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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 13:57:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 13:57:13 -0800
commit7ed214ac2095f561a94335ca672b6c42a1ea40ff (patch)
treeda41901bff1d0d8d61170bf362384fdc61deb3ab /drivers
parent21eaab6d19ed43e82ed39c8deb7f192134fb4a0e (diff)
parent29e5507ae4ab34397f538f06b7070c81a4e4a2bf (diff)
downloadlinux-7ed214ac2095f561a94335ca672b6c42a1ea40ff.tar.gz
Merge tag 'char-misc-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver patches from Greg Kroah-Hartman: "Here's the big char/misc driver patches for 3.9-rc1. Nothing major here, just lots of different driver updates (mei, hyperv, ipack, extcon, vmci, etc.). All of these have been in the linux-next tree for a while." * tag 'char-misc-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (209 commits) w1: w1_therm: Add force-pullup option for "broken" sensors w1: ds2482: Added 1-Wire pull-up support to the driver vme: add missing put_device() after device_register() fails extcon: max8997: Use workqueue to check cable state after completing boot of platform extcon: max8997: Set default UART/USB path on probe extcon: max8997: Consolidate duplicate code for checking ADC/CHG cable type extcon: max8997: Set default of ADC debounce time during initialization extcon: max8997: Remove duplicate code related to set H/W line path extcon: max8997: Move defined constant to header file extcon: max77693: Make max77693_extcon_cable static extcon: max8997: Remove unreachable code extcon: max8997: Make max8997_extcon_cable static extcon: max77693: Remove unnecessary goto statement to improve readability extcon: max77693: Convert to devm_input_allocate_device() extcon: gpio: Rename filename of extcon-gpio.c according to kernel naming style CREDITS: update email and address of Harald Hoyer extcon: arizona: Use MICDET for final microphone identification extcon: arizona: Always take the first HPDET reading as the final one extcon: arizona: Clear _trig_sts bits after jack detection extcon: arizona: Don't HPDET magic when headphones are enabled ...
Diffstat (limited to 'drivers')
-rw-r--r--drivers/Kconfig2
-rw-r--r--drivers/Makefile1
-rw-r--r--drivers/char/hw_random/exynos-rng.c2
-rw-r--r--drivers/char/mem.c10
-rw-r--r--drivers/char/pcmcia/synclink_cs.c645
-rw-r--r--drivers/extcon/Kconfig4
-rw-r--r--drivers/extcon/extcon-arizona.c810
-rw-r--r--drivers/extcon/extcon-gpio.c2
-rw-r--r--drivers/extcon/extcon-max77693.c981
-rw-r--r--drivers/extcon/extcon-max8997.c734
-rw-r--r--drivers/hid/hid-hyperv.c3
-rw-r--r--drivers/hv/channel.c33
-rw-r--r--drivers/hv/channel_mgmt.c93
-rw-r--r--drivers/hv/connection.c232
-rw-r--r--drivers/hv/hv.c72
-rw-r--r--drivers/hv/hv_balloon.c63
-rw-r--r--drivers/hv/hv_util.c46
-rw-r--r--drivers/hv/hyperv_vmbus.h65
-rw-r--r--drivers/hv/ring_buffer.c130
-rw-r--r--drivers/hv/vmbus_drv.c54
-rw-r--r--drivers/ipack/devices/ipoctal.c113
-rw-r--r--drivers/mfd/wm5102-tables.c10
-rw-r--r--drivers/misc/Kconfig12
-rw-r--r--drivers/misc/Makefile3
-rw-r--r--drivers/misc/cb710/Kconfig2
-rw-r--r--drivers/misc/lattice-ecp3-config.c243
-rw-r--r--drivers/misc/mei/Kconfig15
-rw-r--r--drivers/misc/mei/Makefile6
-rw-r--r--drivers/misc/mei/amthif.c164
-rw-r--r--drivers/misc/mei/client.c729
-rw-r--r--drivers/misc/mei/client.h102
-rw-r--r--drivers/misc/mei/hbm.c669
-rw-r--r--drivers/misc/mei/hbm.h39
-rw-r--r--drivers/misc/mei/hw-me-regs.h167
-rw-r--r--drivers/misc/mei/hw-me.c576
-rw-r--r--drivers/misc/mei/hw-me.h48
-rw-r--r--drivers/misc/mei/hw.h125
-rw-r--r--drivers/misc/mei/init.c572
-rw-r--r--drivers/misc/mei/interface.c388
-rw-r--r--drivers/misc/mei/interface.h81
-rw-r--r--drivers/misc/mei/interrupt.c656
-rw-r--r--drivers/misc/mei/iorw.c366
-rw-r--r--drivers/misc/mei/main.c536
-rw-r--r--drivers/misc/mei/mei_dev.h350
-rw-r--r--drivers/misc/mei/pci-me.c396
-rw-r--r--drivers/misc/mei/wd.c77
-rw-r--r--drivers/misc/ti-st/st_core.c3
-rw-r--r--drivers/misc/vmw_vmci/Kconfig16
-rw-r--r--drivers/misc/vmw_vmci/Makefile4
-rw-r--r--drivers/misc/vmw_vmci/vmci_context.c1214
-rw-r--r--drivers/misc/vmw_vmci/vmci_context.h182
-rw-r--r--drivers/misc/vmw_vmci/vmci_datagram.c500
-rw-r--r--drivers/misc/vmw_vmci/vmci_datagram.h52
-rw-r--r--drivers/misc/vmw_vmci/vmci_doorbell.c604
-rw-r--r--drivers/misc/vmw_vmci/vmci_doorbell.h51
-rw-r--r--drivers/misc/vmw_vmci/vmci_driver.c117
-rw-r--r--drivers/misc/vmw_vmci/vmci_driver.h50
-rw-r--r--drivers/misc/vmw_vmci/vmci_event.c224
-rw-r--r--drivers/misc/vmw_vmci/vmci_event.h25
-rw-r--r--drivers/misc/vmw_vmci/vmci_guest.c759
-rw-r--r--drivers/misc/vmw_vmci/vmci_handle_array.c142
-rw-r--r--drivers/misc/vmw_vmci/vmci_handle_array.h52
-rw-r--r--drivers/misc/vmw_vmci/vmci_host.c1043
-rw-r--r--drivers/misc/vmw_vmci/vmci_queue_pair.c3425
-rw-r--r--drivers/misc/vmw_vmci/vmci_queue_pair.h191
-rw-r--r--drivers/misc/vmw_vmci/vmci_resource.c229
-rw-r--r--drivers/misc/vmw_vmci/vmci_resource.h59
-rw-r--r--drivers/misc/vmw_vmci/vmci_route.c226
-rw-r--r--drivers/misc/vmw_vmci/vmci_route.h30
-rw-r--r--drivers/mmc/host/Kconfig2
-rw-r--r--drivers/net/Kconfig4
-rw-r--r--drivers/net/Makefile1
-rw-r--r--drivers/net/hyperv/netvsc_drv.c3
-rw-r--r--drivers/net/ntb_netdev.c408
-rw-r--r--drivers/ntb/Kconfig13
-rw-r--r--drivers/ntb/Makefile3
-rw-r--r--drivers/ntb/ntb_hw.c1141
-rw-r--r--drivers/ntb/ntb_hw.h181
-rw-r--r--drivers/ntb/ntb_regs.h139
-rw-r--r--drivers/ntb/ntb_transport.c1441
-rw-r--r--drivers/pcmcia/i82092.c8
-rw-r--r--drivers/pcmcia/vrc4171_card.c1
-rw-r--r--drivers/scsi/storvsc_drv.c12
-rw-r--r--drivers/vme/vme.c1
-rw-r--r--drivers/w1/masters/ds1wm.c52
-rw-r--r--drivers/w1/masters/ds2482.c51
-rw-r--r--drivers/w1/masters/mxc_w1.c49
-rw-r--r--drivers/w1/masters/w1-gpio.c2
-rw-r--r--drivers/w1/slaves/w1_therm.c36
89 files changed, 19154 insertions, 4019 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 2b4e89ba15a..202fa6d051b 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -152,6 +152,8 @@ source "drivers/memory/Kconfig"
source "drivers/iio/Kconfig"
+source "drivers/ntb/Kconfig"
+
source "drivers/vme/Kconfig"
source "drivers/pwm/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index a8d32f1094b..b359948fc02 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -147,3 +147,4 @@ obj-$(CONFIG_MEMORY) += memory/
obj-$(CONFIG_IIO) += iio/
obj-$(CONFIG_VME_BUS) += vme/
obj-$(CONFIG_IPACK_BUS) += ipack/
+obj-$(CONFIG_NTB) += ntb/
diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c
index 4673fc4ad93..ac47631ab34 100644
--- a/drivers/char/hw_random/exynos-rng.c
+++ b/drivers/char/hw_random/exynos-rng.c
@@ -163,7 +163,7 @@ static int exynos_rng_runtime_resume(struct device *dev)
}
-UNIVERSAL_DEV_PM_OPS(exynos_rng_pm_ops, exynos_rng_runtime_suspend,
+static UNIVERSAL_DEV_PM_OPS(exynos_rng_pm_ops, exynos_rng_runtime_suspend,
exynos_rng_runtime_resume, NULL);
static struct platform_driver exynos_rng_driver = {
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index c6fa3bc2baa..6f6e92a3102 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -399,7 +399,7 @@ static ssize_t read_kmem(struct file *file, char __user *buf,
{
unsigned long p = *ppos;
ssize_t low_count, read, sz;
- char * kbuf; /* k-addr because vread() takes vmlist_lock rwlock */
+ char *kbuf; /* k-addr because vread() takes vmlist_lock rwlock */
int err = 0;
read = 0;
@@ -527,7 +527,7 @@ static ssize_t write_kmem(struct file *file, const char __user *buf,
unsigned long p = *ppos;
ssize_t wrote = 0;
ssize_t virtr = 0;
- char * kbuf; /* k-addr because vwrite() takes vmlist_lock rwlock */
+ char *kbuf; /* k-addr because vwrite() takes vmlist_lock rwlock */
int err = 0;
if (p < (unsigned long) high_memory) {
@@ -595,7 +595,7 @@ static ssize_t write_port(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
unsigned long i = *ppos;
- const char __user * tmp = buf;
+ const char __user *tmp = buf;
if (!access_ok(VERIFY_READ, buf, count))
return -EFAULT;
@@ -729,7 +729,7 @@ static loff_t memory_lseek(struct file *file, loff_t offset, int orig)
return ret;
}
-static int open_port(struct inode * inode, struct file * filp)
+static int open_port(struct inode *inode, struct file *filp)
{
return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
}
@@ -898,7 +898,7 @@ static int __init chr_dev_init(void)
continue;
/*
- * Create /dev/port?
+ * Create /dev/port?
*/
if ((minor == DEVPORT_MINOR) && !arch_has_dev_port())
continue;
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index d0c9852ab87..5c5cc00ebb0 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -102,8 +102,7 @@ static MGSL_PARAMS default_params = {
ASYNC_PARITY_NONE /* unsigned char parity; */
};
-typedef struct
-{
+typedef struct {
int count;
unsigned char status;
char data[1];
@@ -326,10 +325,10 @@ typedef struct _mgslpc_info {
#define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
#define set_reg_bits(info, reg, mask) \
- write_reg(info, (reg), \
+ write_reg(info, (reg), \
(unsigned char) (read_reg(info, (reg)) | (mask)))
#define clear_reg_bits(info, reg, mask) \
- write_reg(info, (reg), \
+ write_reg(info, (reg), \
(unsigned char) (read_reg(info, (reg)) & ~(mask)))
/*
* interrupt enable/disable routines
@@ -356,10 +355,10 @@ static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short
}
#define port_irq_disable(info, mask) \
- { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
+ { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
#define port_irq_enable(info, mask) \
- { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
+ { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
static void rx_start(MGSLPC_INFO *info);
static void rx_stop(MGSLPC_INFO *info);
@@ -397,7 +396,7 @@ static int adapter_test(MGSLPC_INFO *info);
static int claim_resources(MGSLPC_INFO *info);
static void release_resources(MGSLPC_INFO *info);
-static void mgslpc_add_device(MGSLPC_INFO *info);
+static int mgslpc_add_device(MGSLPC_INFO *info);
static void mgslpc_remove_device(MGSLPC_INFO *info);
static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty);
@@ -514,49 +513,56 @@ static const struct tty_port_operations mgslpc_port_ops = {
static int mgslpc_probe(struct pcmcia_device *link)
{
- MGSLPC_INFO *info;
- int ret;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_attach\n");
-
- info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
- if (!info) {
- printk("Error can't allocate device instance data\n");
- return -ENOMEM;
- }
-
- info->magic = MGSLPC_MAGIC;
- tty_port_init(&info->port);
- info->port.ops = &mgslpc_port_ops;
- INIT_WORK(&info->task, bh_handler);
- info->max_frame_size = 4096;
- info->port.close_delay = 5*HZ/10;
- info->port.closing_wait = 30*HZ;
- init_waitqueue_head(&info->status_event_wait_q);
- init_waitqueue_head(&info->event_wait_q);
- spin_lock_init(&info->lock);
- spin_lock_init(&info->netlock);
- memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
- info->idle_mode = HDLC_TXIDLE_FLAGS;
- info->imra_value = 0xffff;
- info->imrb_value = 0xffff;
- info->pim_value = 0xff;
-
- info->p_dev = link;
- link->priv = info;
-
- /* Initialize the struct pcmcia_device structure */
-
- ret = mgslpc_config(link);
- if (ret) {
- tty_port_destroy(&info->port);
- return ret;
- }
-
- mgslpc_add_device(info);
-
- return 0;
+ MGSLPC_INFO *info;
+ int ret;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("mgslpc_attach\n");
+
+ info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
+ if (!info) {
+ printk("Error can't allocate device instance data\n");
+ return -ENOMEM;
+ }
+
+ info->magic = MGSLPC_MAGIC;
+ tty_port_init(&info->port);
+ info->port.ops = &mgslpc_port_ops;
+ INIT_WORK(&info->task, bh_handler);
+ info->max_frame_size = 4096;
+ info->port.close_delay = 5*HZ/10;
+ info->port.closing_wait = 30*HZ;
+ init_waitqueue_head(&info->status_event_wait_q);
+ init_waitqueue_head(&info->event_wait_q);
+ spin_lock_init(&info->lock);
+ spin_lock_init(&info->netlock);
+ memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
+ info->idle_mode = HDLC_TXIDLE_FLAGS;
+ info->imra_value = 0xffff;
+ info->imrb_value = 0xffff;
+ info->pim_value = 0xff;
+
+ info->p_dev = link;
+ link->priv = info;
+
+ /* Initialize the struct pcmcia_device structure */
+
+ ret = mgslpc_config(link);
+ if (ret != 0)
+ goto failed;
+
+ ret = mgslpc_add_device(info);
+ if (ret != 0)
+ goto failed_release;
+
+ return 0;
+
+failed_release:
+ mgslpc_release((u_long)link);
+failed:
+ tty_port_destroy(&info->port);
+ kfree(info);
+ return ret;
}
/* Card has been inserted.
@@ -569,35 +575,35 @@ static int mgslpc_ioprobe(struct pcmcia_device *p_dev, void *priv_data)
static int mgslpc_config(struct pcmcia_device *link)
{
- MGSLPC_INFO *info = link->priv;
- int ret;
+ MGSLPC_INFO *info = link->priv;
+ int ret;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("mgslpc_config(0x%p)\n", link);
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("mgslpc_config(0x%p)\n", link);
- link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
+ link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
- ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL);
- if (ret != 0)
- goto failed;
+ ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL);
+ if (ret != 0)
+ goto failed;
- link->config_index = 8;
- link->config_regs = PRESENT_OPTION;
+ link->config_index = 8;
+ link->config_regs = PRESENT_OPTION;
- ret = pcmcia_request_irq(link, mgslpc_isr);
- if (ret)
- goto failed;
- ret = pcmcia_enable_device(link);
- if (ret)
- goto failed;
+ ret = pcmcia_request_irq(link, mgslpc_isr);
+ if (ret)
+ goto failed;
+ ret = pcmcia_enable_device(link);
+ if (ret)
+ goto failed;
- info->io_base = link->resource[0]->start;
- info->irq_level = link->irq;
- return 0;
+ info->io_base = link->resource[0]->start;
+ info->irq_level = link->irq;
+ return 0;
failed:
- mgslpc_release((u_long)link);
- return -ENODEV;
+ mgslpc_release((u_long)link);
+ return -ENODEV;
}
/* Card has been removed.
@@ -703,12 +709,12 @@ static void tx_pause(struct tty_struct *tty)
if (mgslpc_paranoia_check(info, tty->name, "tx_pause"))
return;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("tx_pause(%s)\n",info->device_name);
+ printk("tx_pause(%s)\n", info->device_name);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (info->tx_enabled)
- tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ tx_stop(info);
+ spin_unlock_irqrestore(&info->lock, flags);
}
static void tx_release(struct tty_struct *tty)
@@ -719,12 +725,12 @@ static void tx_release(struct tty_struct *tty)
if (mgslpc_paranoia_check(info, tty->name, "tx_release"))
return;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("tx_release(%s)\n",info->device_name);
+ printk("tx_release(%s)\n", info->device_name);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (!info->tx_enabled)
- tx_start(info, tty);
- spin_unlock_irqrestore(&info->lock,flags);
+ tx_start(info, tty);
+ spin_unlock_irqrestore(&info->lock, flags);
}
/* Return next bottom half action to perform.
@@ -735,7 +741,7 @@ static int bh_action(MGSLPC_INFO *info)
unsigned long flags;
int rc = 0;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (info->pending_bh & BH_RECEIVE) {
info->pending_bh &= ~BH_RECEIVE;
@@ -754,7 +760,7 @@ static int bh_action(MGSLPC_INFO *info)
info->bh_requested = false;
}
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return rc;
}
@@ -766,7 +772,7 @@ static void bh_handler(struct work_struct *work)
int action;
if (debug_level >= DEBUG_LEVEL_BH)
- printk( "%s(%d):bh_handler(%s) entry\n",
+ printk("%s(%d):bh_handler(%s) entry\n",
__FILE__,__LINE__,info->device_name);
info->bh_running = true;
@@ -775,8 +781,8 @@ static void bh_handler(struct work_struct *work)
while((action = bh_action(info)) != 0) {
/* Process work item */
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):bh_handler() work item action=%d\n",
+ if (debug_level >= DEBUG_LEVEL_BH)
+ printk("%s(%d):bh_handler() work item action=%d\n",
__FILE__,__LINE__,action);
switch (action) {
@@ -799,7 +805,7 @@ static void bh_handler(struct work_struct *work)
tty_kref_put(tty);
if (debug_level >= DEBUG_LEVEL_BH)
- printk( "%s(%d):bh_handler(%s) exit\n",
+ printk("%s(%d):bh_handler(%s) exit\n",
__FILE__,__LINE__,info->device_name);
}
@@ -828,7 +834,7 @@ static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size));
if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom);
+ printk("%s(%d):rx_ready_hdlc(eom=%d)\n", __FILE__, __LINE__, eom);
if (!info->rx_enabled)
return;
@@ -844,7 +850,8 @@ static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
if (eom) {
/* end of frame, get FIFO count from RBCL register */
- if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f)))
+ fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
+ if (fifo_count == 0)
fifo_count = 32;
} else
fifo_count = 32;
@@ -889,7 +896,7 @@ static void rx_ready_async(MGSLPC_INFO *info, int tcd)
unsigned char data, status, flag;
int fifo_count;
int work = 0;
- struct mgsl_icount *icount = &info->icount;
+ struct mgsl_icount *icount = &info->icount;
if (tcd) {
/* early termination, get FIFO count from RBCL register */
@@ -994,7 +1001,7 @@ static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty)
int c;
if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name);
+ printk("%s(%d):tx_ready(%s)\n", __FILE__, __LINE__, info->device_name);
if (info->params.mode == MGSL_MODE_HDLC) {
if (!info->tx_active)
@@ -1239,7 +1246,7 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
*/
if (info->pending_bh && !info->bh_running && !info->bh_requested) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
+ if (debug_level >= DEBUG_LEVEL_ISR)
printk("%s(%d):%s queueing bh task.\n",
__FILE__,__LINE__,info->device_name);
schedule_work(&info->task);
@@ -1263,7 +1270,7 @@ static int startup(MGSLPC_INFO * info, struct tty_struct *tty)
int retval = 0;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name);
+ printk("%s(%d):startup(%s)\n", __FILE__, __LINE__, info->device_name);
if (info->port.flags & ASYNC_INITIALIZED)
return 0;
@@ -1273,7 +1280,7 @@ static int startup(MGSLPC_INFO * info, struct tty_struct *tty)
info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
if (!info->tx_buf) {
printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
- __FILE__,__LINE__,info->device_name);
+ __FILE__, __LINE__, info->device_name);
return -ENOMEM;
}
}
@@ -1288,15 +1295,15 @@ static int startup(MGSLPC_INFO * info, struct tty_struct *tty)
retval = claim_resources(info);
/* perform existence check and diagnostics */
- if ( !retval )
+ if (!retval)
retval = adapter_test(info);
- if ( retval ) {
- if (capable(CAP_SYS_ADMIN) && tty)
+ if (retval) {
+ if (capable(CAP_SYS_ADMIN) && tty)
set_bit(TTY_IO_ERROR, &tty->flags);
release_resources(info);
- return retval;
- }
+ return retval;
+ }
/* program hardware for current parameters */
mgslpc_change_params(info, tty);
@@ -1320,7 +1327,7 @@ static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_shutdown(%s)\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
/* clear status wait queue because status changes */
/* can't happen after shutting down the hardware */
@@ -1334,7 +1341,7 @@ static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
info->tx_buf = NULL;
}
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
rx_stop(info);
tx_stop(info);
@@ -1342,12 +1349,12 @@ static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
/* TODO:disable interrupts instead of reset to preserve signal states */
reset_device(info);
- if (!tty || tty->termios.c_cflag & HUPCL) {
+ if (!tty || tty->termios.c_cflag & HUPCL) {
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
set_signals(info);
}
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
release_resources(info);
@@ -1361,7 +1368,7 @@ static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty)
{
unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
rx_stop(info);
tx_stop(info);
@@ -1386,7 +1393,7 @@ static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty)
if (info->netcount || (tty && (tty->termios.c_cflag & CREAD)))
rx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
}
/* Reconfigure adapter based on new parameters
@@ -1401,13 +1408,13 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_change_params(%s)\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
cflag = tty->termios.c_cflag;
/* if B0 rate (hangup) specified then negate RTS and DTR */
/* otherwise assert RTS and DTR */
- if (cflag & CBAUD)
+ if (cflag & CBAUD)
info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
else
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
@@ -1453,7 +1460,7 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
info->params.data_rate = tty_get_baud_rate(tty);
}
- if ( info->params.data_rate ) {
+ if (info->params.data_rate) {
info->timeout = (32*HZ*bits_per_char) /
info->params.data_rate;
}
@@ -1488,8 +1495,8 @@ static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO) {
- printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
- __FILE__,__LINE__,ch,info->device_name);
+ printk("%s(%d):mgslpc_put_char(%d) on %s\n",
+ __FILE__, __LINE__, ch, info->device_name);
}
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char"))
@@ -1498,7 +1505,7 @@ static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
if (!info->tx_buf)
return 0;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) {
if (info->tx_count < TXBUFSIZE - 1) {
@@ -1508,7 +1515,7 @@ static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
}
}
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return 1;
}
@@ -1521,8 +1528,8 @@ static void mgslpc_flush_chars(struct tty_struct *tty)
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
- __FILE__,__LINE__,info->device_name,info->tx_count);
+ printk("%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
+ __FILE__, __LINE__, info->device_name, info->tx_count);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars"))
return;
@@ -1532,13 +1539,13 @@ static void mgslpc_flush_chars(struct tty_struct *tty)
return;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
- __FILE__,__LINE__,info->device_name);
+ printk("%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
+ __FILE__, __LINE__, info->device_name);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (!info->tx_active)
- tx_start(info, tty);
- spin_unlock_irqrestore(&info->lock,flags);
+ tx_start(info, tty);
+ spin_unlock_irqrestore(&info->lock, flags);
}
/* Send a block of data
@@ -1559,8 +1566,8 @@ static int mgslpc_write(struct tty_struct * tty,
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):mgslpc_write(%s) count=%d\n",
- __FILE__,__LINE__,info->device_name,count);
+ printk("%s(%d):mgslpc_write(%s) count=%d\n",
+ __FILE__, __LINE__, info->device_name, count);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") ||
!info->tx_buf)
@@ -1586,26 +1593,26 @@ static int mgslpc_write(struct tty_struct * tty,
memcpy(info->tx_buf + info->tx_put, buf, c);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1);
info->tx_count += c;
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
buf += c;
count -= c;
ret += c;
}
start:
- if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
- spin_lock_irqsave(&info->lock,flags);
+ if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
+ spin_lock_irqsave(&info->lock, flags);
if (!info->tx_active)
- tx_start(info, tty);
- spin_unlock_irqrestore(&info->lock,flags);
- }
+ tx_start(info, tty);
+ spin_unlock_irqrestore(&info->lock, flags);
+ }
cleanup:
if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
- __FILE__,__LINE__,info->device_name,ret);
+ printk("%s(%d):mgslpc_write(%s) returning=%d\n",
+ __FILE__, __LINE__, info->device_name, ret);
return ret;
}
@@ -1633,7 +1640,7 @@ static int mgslpc_write_room(struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_write_room(%s)=%d\n",
- __FILE__,__LINE__, info->device_name, ret);
+ __FILE__, __LINE__, info->device_name, ret);
return ret;
}
@@ -1646,7 +1653,7 @@ static int mgslpc_chars_in_buffer(struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer"))
return 0;
@@ -1658,7 +1665,7 @@ static int mgslpc_chars_in_buffer(struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
- __FILE__,__LINE__, info->device_name, rc);
+ __FILE__, __LINE__, info->device_name, rc);
return rc;
}
@@ -1672,15 +1679,15 @@ static void mgslpc_flush_buffer(struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer"))
return;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
info->tx_count = info->tx_put = info->tx_get = 0;
del_timer(&info->tx_timer);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
wake_up_interruptible(&tty->write_wait);
tty_wakeup(tty);
@@ -1695,17 +1702,17 @@ static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
- __FILE__,__LINE__, info->device_name, ch );
+ __FILE__, __LINE__, info->device_name, ch);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar"))
return;
info->x_char = ch;
if (ch) {
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (!info->tx_enabled)
- tx_start(info, tty);
- spin_unlock_irqrestore(&info->lock,flags);
+ tx_start(info, tty);
+ spin_unlock_irqrestore(&info->lock, flags);
}
}
@@ -1718,7 +1725,7 @@ static void mgslpc_throttle(struct tty_struct * tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_throttle(%s) entry\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle"))
return;
@@ -1726,11 +1733,11 @@ static void mgslpc_throttle(struct tty_struct * tty)
if (I_IXOFF(tty))
mgslpc_send_xchar(tty, STOP_CHAR(tty));
- if (tty->termios.c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->lock,flags);
+ if (tty->termios.c_cflag & CRTSCTS) {
+ spin_lock_irqsave(&info->lock, flags);
info->serial_signals &= ~SerialSignal_RTS;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
}
}
@@ -1743,7 +1750,7 @@ static void mgslpc_unthrottle(struct tty_struct * tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle"))
return;
@@ -1755,11 +1762,11 @@ static void mgslpc_unthrottle(struct tty_struct * tty)
mgslpc_send_xchar(tty, START_CHAR(tty));
}
- if (tty->termios.c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->lock,flags);
+ if (tty->termios.c_cflag & CRTSCTS) {
+ spin_lock_irqsave(&info->lock, flags);
info->serial_signals |= SerialSignal_RTS;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
}
}
@@ -1797,33 +1804,33 @@ static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
*
* Arguments:
*
- * info pointer to device instance data
- * new_params user buffer containing new serial params
+ * info pointer to device instance data
+ * new_params user buffer containing new serial params
*
* Returns: 0 if success, otherwise error code
*/
static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty)
{
- unsigned long flags;
+ unsigned long flags;
MGSL_PARAMS tmp_params;
int err;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):set_params %s\n", __FILE__,__LINE__,
- info->device_name );
+ info->device_name);
COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):set_params(%s) user buffer copy failed\n",
- __FILE__,__LINE__,info->device_name);
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):set_params(%s) user buffer copy failed\n",
+ __FILE__, __LINE__, info->device_name);
return -EFAULT;
}
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
- mgslpc_change_params(info, tty);
+ mgslpc_change_params(info, tty);
return 0;
}
@@ -1841,13 +1848,13 @@ static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode)
static int set_txidle(MGSLPC_INFO * info, int idle_mode)
{
- unsigned long flags;
+ unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("set_txidle(%s,%d)\n", info->device_name, idle_mode);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
info->idle_mode = idle_mode;
tx_set_idle(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return 0;
}
@@ -1864,11 +1871,11 @@ static int get_interface(MGSLPC_INFO * info, int __user *if_mode)
static int set_interface(MGSLPC_INFO * info, int if_mode)
{
- unsigned long flags;
+ unsigned long flags;
unsigned char val;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("set_interface(%s,%d)\n", info->device_name, if_mode);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
info->if_mode = if_mode;
val = read_reg(info, PVR) & 0x0f;
@@ -1880,18 +1887,18 @@ static int set_interface(MGSLPC_INFO * info, int if_mode)
}
write_reg(info, PVR, val);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return 0;
}
static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty)
{
- unsigned long flags;
+ unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("set_txenable(%s,%d)\n", info->device_name, enable);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (enable) {
if (!info->tx_enabled)
tx_start(info, tty);
@@ -1899,18 +1906,18 @@ static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty)
if (info->tx_enabled)
tx_stop(info);
}
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return 0;
}
static int tx_abort(MGSLPC_INFO * info)
{
- unsigned long flags;
+ unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("tx_abort(%s)\n", info->device_name);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (info->tx_active && info->tx_count &&
info->params.mode == MGSL_MODE_HDLC) {
/* clear data count so FIFO is not filled on next IRQ.
@@ -1919,18 +1926,18 @@ static int tx_abort(MGSLPC_INFO * info)
info->tx_count = info->tx_put = info->tx_get = 0;
info->tx_aborting = true;
}
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return 0;
}
static int set_rxenable(MGSLPC_INFO * info, int enable)
{
- unsigned long flags;
+ unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("set_rxenable(%s,%d)\n", info->device_name, enable);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (enable) {
if (!info->rx_enabled)
rx_start(info);
@@ -1938,21 +1945,21 @@ static int set_rxenable(MGSLPC_INFO * info, int enable)
if (info->rx_enabled)
rx_stop(info);
}
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return 0;
}
/* wait for specified event to occur
*
- * Arguments: info pointer to device instance data
- * mask pointer to bitmask of events to wait for
- * Return Value: 0 if successful and bit mask updated with
+ * Arguments: info pointer to device instance data
+ * mask pointer to bitmask of events to wait for
+ * Return Value: 0 if successful and bit mask updated with
* of events triggerred,
- * otherwise error code
+ * otherwise error code
*/
static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
{
- unsigned long flags;
+ unsigned long flags;
int s;
int rc=0;
struct mgsl_icount cprev, cnow;
@@ -1968,18 +1975,18 @@ static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("wait_events(%s,%d)\n", info->device_name, mask);
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
/* return immediately if state matches requested events */
get_signals(info);
s = info->serial_signals;
events = mask &
( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
- ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
+ ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
if (events) {
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
goto exit;
}
@@ -1994,7 +2001,7 @@ static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
set_current_state(TASK_INTERRUPTIBLE);
add_wait_queue(&info->event_wait_q, &wait);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
for(;;) {
@@ -2005,11 +2012,11 @@ static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
}
/* get current irq counts */
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
cnow = info->icount;
newsigs = info->input_signal_events;
set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
/* if no change, wait aborted for some reason */
if (newsigs.dsr_up == oldsigs.dsr_up &&
@@ -2048,10 +2055,10 @@ static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
set_current_state(TASK_RUNNING);
if (mask & MgslEvent_ExitHuntMode) {
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (!waitqueue_active(&info->event_wait_q))
irq_disable(info, CHA, IRQ_EXITHUNT);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
}
exit:
if (rc == 0)
@@ -2061,17 +2068,17 @@ exit:
static int modem_input_wait(MGSLPC_INFO *info,int arg)
{
- unsigned long flags;
+ unsigned long flags;
int rc;
struct mgsl_icount cprev, cnow;
DECLARE_WAITQUEUE(wait, current);
/* save current irq counts */
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
cprev = info->icount;
add_wait_queue(&info->status_event_wait_q, &wait);
set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
for(;;) {
schedule();
@@ -2081,10 +2088,10 @@ static int modem_input_wait(MGSLPC_INFO *info,int arg)
}
/* get new irq counts */
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
cnow = info->icount;
set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
/* if no change, wait aborted for some reason */
if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
@@ -2115,11 +2122,11 @@ static int tiocmget(struct tty_struct *tty)
{
MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
unsigned int result;
- unsigned long flags;
+ unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
@@ -2130,7 +2137,7 @@ static int tiocmget(struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s tiocmget() value=%08X\n",
- __FILE__,__LINE__, info->device_name, result );
+ __FILE__, __LINE__, info->device_name, result);
return result;
}
@@ -2140,11 +2147,11 @@ static int tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear)
{
MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
- unsigned long flags;
+ unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s tiocmset(%x,%x)\n",
- __FILE__,__LINE__,info->device_name, set, clear);
+ __FILE__, __LINE__, info->device_name, set, clear);
if (set & TIOCM_RTS)
info->serial_signals |= SerialSignal_RTS;
@@ -2155,9 +2162,9 @@ static int tiocmset(struct tty_struct *tty,
if (clear & TIOCM_DTR)
info->serial_signals &= ~SerialSignal_DTR;
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
return 0;
}
@@ -2174,17 +2181,17 @@ static int mgslpc_break(struct tty_struct *tty, int break_state)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_break(%s,%d)\n",
- __FILE__,__LINE__, info->device_name, break_state);
+ __FILE__, __LINE__, info->device_name, break_state);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break"))
return -EINVAL;
- spin_lock_irqsave(&info->lock,flags);
- if (break_state == -1)
+ spin_lock_irqsave(&info->lock, flags);
+ if (break_state == -1)
set_reg_bits(info, CHA+DAFO, BIT6);
else
clear_reg_bits(info, CHA+DAFO, BIT6);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return 0;
}
@@ -2195,9 +2202,9 @@ static int mgslpc_get_icount(struct tty_struct *tty,
struct mgsl_icount cnow; /* kernel counter temps */
unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
cnow = info->icount;
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
icount->cts = cnow.cts;
icount->dsr = cnow.dsr;
@@ -2218,9 +2225,9 @@ static int mgslpc_get_icount(struct tty_struct *tty,
*
* Arguments:
*
- * tty pointer to tty instance data
- * cmd IOCTL command code
- * arg command argument/context
+ * tty pointer to tty instance data
+ * cmd IOCTL command code
+ * arg command argument/context
*
* Return Value: 0 if success, otherwise error code
*/
@@ -2231,8 +2238,8 @@ static int mgslpc_ioctl(struct tty_struct *tty,
void __user *argp = (void __user *)arg;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
- info->device_name, cmd );
+ printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__, __LINE__,
+ info->device_name, cmd);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl"))
return -ENODEV;
@@ -2278,8 +2285,8 @@ static int mgslpc_ioctl(struct tty_struct *tty,
*
* Arguments:
*
- * tty pointer to tty structure
- * termios pointer to buffer to hold returned old termios
+ * tty pointer to tty structure
+ * termios pointer to buffer to hold returned old termios
*/
static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
{
@@ -2287,8 +2294,8 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__,
- tty->driver->name );
+ printk("%s(%d):mgslpc_set_termios %s\n", __FILE__, __LINE__,
+ tty->driver->name);
/* just return if nothing has changed */
if ((tty->termios.c_cflag == old_termios->c_cflag)
@@ -2302,22 +2309,22 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term
if (old_termios->c_cflag & CBAUD &&
!(tty->termios.c_cflag & CBAUD)) {
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
}
/* Handle transition away from B0 status */
if (!(old_termios->c_cflag & CBAUD) &&
tty->termios.c_cflag & CBAUD) {
info->serial_signals |= SerialSignal_DTR;
- if (!(tty->termios.c_cflag & CRTSCTS) ||
- !test_bit(TTY_THROTTLED, &tty->flags)) {
+ if (!(tty->termios.c_cflag & CRTSCTS) ||
+ !test_bit(TTY_THROTTLED, &tty->flags)) {
info->serial_signals |= SerialSignal_RTS;
- }
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ }
+ spin_lock_irqsave(&info->lock, flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
}
/* Handle turning off CRTSCTS */
@@ -2338,15 +2345,15 @@ static void mgslpc_close(struct tty_struct *tty, struct file * filp)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
- __FILE__,__LINE__, info->device_name, port->count);
+ __FILE__, __LINE__, info->device_name, port->count);
WARN_ON(!port->count);
if (tty_port_close_start(port, tty, filp) == 0)
goto cleanup;
- if (port->flags & ASYNC_INITIALIZED)
- mgslpc_wait_until_sent(tty, info->timeout);
+ if (port->flags & ASYNC_INITIALIZED)
+ mgslpc_wait_until_sent(tty, info->timeout);
mgslpc_flush_buffer(tty);
@@ -2357,7 +2364,7 @@ static void mgslpc_close(struct tty_struct *tty, struct file * filp)
tty_port_tty_set(port, NULL);
cleanup:
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__,
+ printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__, __LINE__,
tty->driver->name, port->count);
}
@@ -2368,12 +2375,12 @@ static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
unsigned long orig_jiffies, char_time;
- if (!info )
+ if (!info)
return;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
return;
@@ -2389,8 +2396,8 @@ static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
* Note: use tight timings here to satisfy the NIST-PCTS.
*/
- if ( info->params.data_rate ) {
- char_time = info->timeout/(32 * 5);
+ if (info->params.data_rate) {
+ char_time = info->timeout/(32 * 5);
if (!char_time)
char_time++;
} else
@@ -2421,7 +2428,7 @@ static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
exit:
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
}
/* Called by tty_hangup() when a hangup is signaled.
@@ -2433,7 +2440,7 @@ static void mgslpc_hangup(struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_hangup(%s)\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup"))
return;
@@ -2448,9 +2455,9 @@ static int carrier_raised(struct tty_port *port)
MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
if (info->serial_signals & SerialSignal_DCD)
return 1;
@@ -2462,13 +2469,13 @@ static void dtr_rts(struct tty_port *port, int onoff)
MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (onoff)
info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
else
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
}
@@ -2476,14 +2483,14 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
{
MGSLPC_INFO *info;
struct tty_port *port;
- int retval, line;
- unsigned long flags;
+ int retval, line;
+ unsigned long flags;
/* verify range of specified line number */
line = tty->index;
if (line >= mgslpc_device_count) {
printk("%s(%d):mgslpc_open with invalid line #%d.\n",
- __FILE__,__LINE__,line);
+ __FILE__, __LINE__, line);
return -ENODEV;
}
@@ -2500,7 +2507,7 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
- __FILE__,__LINE__,tty->driver->name, port->count);
+ __FILE__, __LINE__, tty->driver->name, port->count);
/* If port is closing, signal caller to try again */
if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){
@@ -2535,13 +2542,13 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
if (retval) {
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):block_til_ready(%s) returned %d\n",
- __FILE__,__LINE__, info->device_name, retval);
+ __FILE__, __LINE__, info->device_name, retval);
goto cleanup;
}
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_open(%s) success\n",
- __FILE__,__LINE__, info->device_name);
+ __FILE__, __LINE__, info->device_name);
retval = 0;
cleanup:
@@ -2561,9 +2568,9 @@ static inline void line_info(struct seq_file *m, MGSLPC_INFO *info)
info->device_name, info->io_base, info->irq_level);
/* output current serial signal states */
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
stat_buf[0] = 0;
stat_buf[1] = 0;
@@ -2625,7 +2632,7 @@ static int mgslpc_proc_show(struct seq_file *m, void *v)
seq_printf(m, "synclink driver:%s\n", driver_version);
info = mgslpc_device_list;
- while( info ) {
+ while (info) {
line_info(m, info);
info = info->next_device;
}
@@ -2686,8 +2693,8 @@ static void rx_free_buffers(MGSLPC_INFO *info)
static int claim_resources(MGSLPC_INFO *info)
{
- if (rx_alloc_buffers(info) < 0 ) {
- printk( "Can't allocate rx buffer %s\n", info->device_name);
+ if (rx_alloc_buffers(info) < 0) {
+ printk("Can't allocate rx buffer %s\n", info->device_name);
release_resources(info);
return -ENODEV;
}
@@ -2706,8 +2713,12 @@ static void release_resources(MGSLPC_INFO *info)
*
* Arguments: info pointer to device instance data
*/
-static void mgslpc_add_device(MGSLPC_INFO *info)
+static int mgslpc_add_device(MGSLPC_INFO *info)
{
+ MGSLPC_INFO *current_dev = NULL;
+ struct device *tty_dev;
+ int ret;
+
info->next_device = NULL;
info->line = mgslpc_device_count;
sprintf(info->device_name,"ttySLP%d",info->line);
@@ -2722,8 +2733,8 @@ static void mgslpc_add_device(MGSLPC_INFO *info)
if (!mgslpc_device_list)
mgslpc_device_list = info;
else {
- MGSLPC_INFO *current_dev = mgslpc_device_list;
- while( current_dev->next_device )
+ current_dev = mgslpc_device_list;
+ while (current_dev->next_device)
current_dev = current_dev->next_device;
current_dev->next_device = info;
}
@@ -2733,14 +2744,34 @@ static void mgslpc_add_device(MGSLPC_INFO *info)
else if (info->max_frame_size > 65535)
info->max_frame_size = 65535;
- printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
+ printk("SyncLink PC Card %s:IO=%04X IRQ=%d\n",
info->device_name, info->io_base, info->irq_level);
#if SYNCLINK_GENERIC_HDLC
- hdlcdev_init(info);
+ ret = hdlcdev_init(info);
+ if (ret != 0)
+ goto failed;
#endif
- tty_port_register_device(&info->port, serial_driver, info->line,
+
+ tty_dev = tty_port_register_device(&info->port, serial_driver, info->line,
&info->p_dev->dev);
+ if (IS_ERR(tty_dev)) {
+ ret = PTR_ERR(tty_dev);
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_exit(info);
+#endif
+ goto failed;
+ }
+
+ return 0;
+
+failed:
+ if (current_dev)
+ current_dev->next_device = NULL;
+ else
+ mgslpc_device_list = NULL;
+ mgslpc_device_count--;
+ return ret;
}
static void mgslpc_remove_device(MGSLPC_INFO *remove_info)
@@ -3262,7 +3293,7 @@ static void rx_stop(MGSLPC_INFO *info)
{
if (debug_level >= DEBUG_LEVEL_ISR)
printk("%s(%d):rx_stop(%s)\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
/* MODE:03 RAC Receiver Active, 0=inactive */
clear_reg_bits(info, CHA + MODE, BIT3);
@@ -3275,7 +3306,7 @@ static void rx_start(MGSLPC_INFO *info)
{
if (debug_level >= DEBUG_LEVEL_ISR)
printk("%s(%d):rx_start(%s)\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
rx_reset_buffers(info);
info->rx_enabled = false;
@@ -3291,7 +3322,7 @@ static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty)
{
if (debug_level >= DEBUG_LEVEL_ISR)
printk("%s(%d):tx_start(%s)\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
if (info->tx_count) {
/* If auto RTS enabled and RTS is inactive, then assert */
@@ -3329,7 +3360,7 @@ static void tx_stop(MGSLPC_INFO *info)
{
if (debug_level >= DEBUG_LEVEL_ISR)
printk("%s(%d):tx_stop(%s)\n",
- __FILE__,__LINE__, info->device_name );
+ __FILE__, __LINE__, info->device_name);
del_timer(&info->tx_timer);
@@ -3681,7 +3712,7 @@ static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty)
if (debug_level >= DEBUG_LEVEL_BH)
printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
- __FILE__,__LINE__,info->device_name,status,framesize);
+ __FILE__, __LINE__, info->device_name, status, framesize);
if (debug_level >= DEBUG_LEVEL_DATA)
trace_block(info, buf->data, framesize, 0);
@@ -3709,13 +3740,13 @@ static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty)
}
}
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
buf->status = buf->count = 0;
info->rx_frame_count--;
info->rx_get++;
if (info->rx_get >= info->rx_buf_count)
info->rx_get = 0;
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return true;
}
@@ -3729,7 +3760,7 @@ static bool register_test(MGSLPC_INFO *info)
bool rc = true;
unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
reset_device(info);
for (i = 0; i < count; i++) {
@@ -3742,7 +3773,7 @@ static bool register_test(MGSLPC_INFO *info)
}
}
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return rc;
}
@@ -3751,7 +3782,7 @@ static bool irq_test(MGSLPC_INFO *info)
unsigned long end_time;
unsigned long flags;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
reset_device(info);
info->testing_irq = true;
@@ -3765,7 +3796,7 @@ static bool irq_test(MGSLPC_INFO *info)
write_reg(info, CHA + TIMR, 0); /* 512 cycles */
issue_command(info, CHA, CMD_START_TIMER);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
end_time=100;
while(end_time-- && !info->irq_occurred) {
@@ -3774,9 +3805,9 @@ static bool irq_test(MGSLPC_INFO *info)
info->testing_irq = false;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
reset_device(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return info->irq_occurred;
}
@@ -3785,21 +3816,21 @@ static int adapter_test(MGSLPC_INFO *info)
{
if (!register_test(info)) {
info->init_error = DiagStatus_AddressFailure;
- printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
- __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
+ printk("%s(%d):Register test failure for device %s Addr=%04X\n",
+ __FILE__, __LINE__, info->device_name, (unsigned short)(info->io_base));
return -ENODEV;
}
if (!irq_test(info)) {
info->init_error = DiagStatus_IrqFailure;
- printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
- __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
+ printk("%s(%d):Interrupt test failure for device %s IRQ=%d\n",
+ __FILE__, __LINE__, info->device_name, (unsigned short)(info->irq_level));
return -ENODEV;
}
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):device %s passed diagnostics\n",
- __FILE__,__LINE__,info->device_name);
+ __FILE__, __LINE__, info->device_name);
return 0;
}
@@ -3808,9 +3839,9 @@ static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
int i;
int linecount;
if (xmit)
- printk("%s tx data:\n",info->device_name);
+ printk("%s tx data:\n", info->device_name);
else
- printk("%s rx data:\n",info->device_name);
+ printk("%s rx data:\n", info->device_name);
while(count) {
if (count > 16)
@@ -3819,12 +3850,12 @@ static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
linecount = count;
for(i=0;i<linecount;i++)
- printk("%02X ",(unsigned char)data[i]);
+ printk("%02X ", (unsigned char)data[i]);
for(;i<17;i++)
printk(" ");
for(i=0;i<linecount;i++) {
if (data[i]>=040 && data[i]<=0176)
- printk("%c",data[i]);
+ printk("%c", data[i]);
else
printk(".");
}
@@ -3843,18 +3874,18 @@ static void tx_timeout(unsigned long context)
MGSLPC_INFO *info = (MGSLPC_INFO*)context;
unsigned long flags;
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):tx_timeout(%s)\n",
- __FILE__,__LINE__,info->device_name);
- if(info->tx_active &&
- info->params.mode == MGSL_MODE_HDLC) {
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):tx_timeout(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+ if (info->tx_active &&
+ info->params.mode == MGSL_MODE_HDLC) {
info->icount.txtimeout++;
}
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
info->tx_active = false;
info->tx_count = info->tx_put = info->tx_get = 0;
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
#if SYNCLINK_GENERIC_HDLC
if (info->netcount)
@@ -3936,7 +3967,7 @@ static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
+ printk(KERN_INFO "%s:hdlc_xmit(%s)\n", __FILE__, dev->name);
/* stop sending until this frame completes */
netif_stop_queue(dev);
@@ -3957,13 +3988,13 @@ static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
dev->trans_start = jiffies;
/* start hardware transmitter if necessary */
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
if (!info->tx_active) {
struct tty_struct *tty = tty_port_tty_get(&info->port);
- tx_start(info, tty);
- tty_kref_put(tty);
+ tx_start(info, tty);
+ tty_kref_put(tty);
}
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return NETDEV_TX_OK;
}
@@ -3984,10 +4015,11 @@ static int hdlcdev_open(struct net_device *dev)
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
+ printk("%s:hdlcdev_open(%s)\n", __FILE__, dev->name);
/* generic HDLC layer open processing */
- if ((rc = hdlc_open(dev)))
+ rc = hdlc_open(dev);
+ if (rc != 0)
return rc;
/* arbitrate between network and tty opens */
@@ -4002,7 +4034,8 @@ static int hdlcdev_open(struct net_device *dev)
tty = tty_port_tty_get(&info->port);
/* claim resources and init adapter */
- if ((rc = startup(info, tty)) != 0) {
+ rc = startup(info, tty);
+ if (rc != 0) {
tty_kref_put(tty);
spin_lock_irqsave(&info->netlock, flags);
info->netcount=0;
@@ -4044,7 +4077,7 @@ static int hdlcdev_close(struct net_device *dev)
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
+ printk("%s:hdlcdev_close(%s)\n", __FILE__, dev->name);
netif_stop_queue(dev);
@@ -4078,7 +4111,7 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
unsigned int flags;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
+ printk("%s:hdlcdev_ioctl(%s)\n", __FILE__, dev->name);
/* return error if TTY interface open */
if (info->port.count)
@@ -4179,14 +4212,14 @@ static void hdlcdev_tx_timeout(struct net_device *dev)
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("hdlcdev_tx_timeout(%s)\n",dev->name);
+ printk("hdlcdev_tx_timeout(%s)\n", dev->name);
dev->stats.tx_errors++;
dev->stats.tx_aborted_errors++;
- spin_lock_irqsave(&info->lock,flags);
+ spin_lock_irqsave(&info->lock, flags);
tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ spin_unlock_irqrestore(&info->lock, flags);
netif_wake_queue(dev);
}
@@ -4217,7 +4250,7 @@ static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size)
struct net_device *dev = info->netdev;
if (debug_level >= DEBUG_LEVEL_INFO)
- printk("hdlcdev_rx(%s)\n",dev->name);
+ printk("hdlcdev_rx(%s)\n", dev->name);
if (skb == NULL) {
printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
@@ -4260,8 +4293,9 @@ static int hdlcdev_init(MGSLPC_INFO *info)
/* allocate and initialize network and HDLC layer objects */
- if (!(dev = alloc_hdlcdev(info))) {
- printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
+ dev = alloc_hdlcdev(info);
+ if (dev == NULL) {
+ printk(KERN_ERR "%s:hdlc device allocation failure\n", __FILE__);
return -ENOMEM;
}
@@ -4280,8 +4314,9 @@ static int hdlcdev_init(MGSLPC_INFO *info)
hdlc->xmit = hdlcdev_xmit;
/* register objects with HDLC layer */
- if ((rc = register_hdlc_device(dev))) {
- printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
+ rc = register_hdlc_device(dev);
+ if (rc) {
+ printk(KERN_WARNING "%s:unable to register hdlc device\n", __FILE__);
free_netdev(dev);
return rc;
}
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 07122a9ef36..5168a1324a6 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -29,7 +29,7 @@ config EXTCON_ADC_JACK
config EXTCON_MAX77693
tristate "MAX77693 EXTCON Support"
- depends on MFD_MAX77693
+ depends on MFD_MAX77693 && INPUT
select IRQ_DOMAIN
select REGMAP_I2C
help
@@ -47,7 +47,7 @@ config EXTCON_MAX8997
config EXTCON_ARIZONA
tristate "Wolfson Arizona EXTCON support"
- depends on MFD_ARIZONA && INPUT
+ depends on MFD_ARIZONA && INPUT && SND_SOC
help
Say Y here to enable support for external accessory detection
with Wolfson Arizona devices. These are audio CODECs with
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 414aed50b1b..dc357a4051f 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -27,12 +27,18 @@
#include <linux/regulator/consumer.h>
#include <linux/extcon.h>
+#include <sound/soc.h>
+
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>
#define ARIZONA_NUM_BUTTONS 6
+#define ARIZONA_ACCDET_MODE_MIC 0
+#define ARIZONA_ACCDET_MODE_HPL 1
+#define ARIZONA_ACCDET_MODE_HPR 2
+
struct arizona_extcon_info {
struct device *dev;
struct arizona *arizona;
@@ -45,17 +51,28 @@ struct arizona_extcon_info {
int micd_num_modes;
bool micd_reva;
+ bool micd_clamp;
+
+ struct delayed_work hpdet_work;
+
+ bool hpdet_active;
+ bool hpdet_done;
+
+ int num_hpdet_res;
+ unsigned int hpdet_res[3];
bool mic;
bool detecting;
int jack_flips;
+ int hpdet_ip;
+
struct extcon_dev edev;
};
static const struct arizona_micd_config micd_default_modes[] = {
- { ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
{ 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
+ { ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
};
static struct {
@@ -73,11 +90,13 @@ static struct {
#define ARIZONA_CABLE_MECHANICAL 0
#define ARIZONA_CABLE_MICROPHONE 1
#define ARIZONA_CABLE_HEADPHONE 2
+#define ARIZONA_CABLE_LINEOUT 3
static const char *arizona_cable[] = {
"Mechanical",
"Microphone",
"Headphone",
+ "Line-out",
NULL,
};
@@ -85,8 +104,9 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
{
struct arizona *arizona = info->arizona;
- gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
- info->micd_modes[mode].gpio);
+ if (arizona->pdata.micd_pol_gpio > 0)
+ gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
+ info->micd_modes[mode].gpio);
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_BIAS_SRC_MASK,
info->micd_modes[mode].bias);
@@ -98,19 +118,70 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
}
+static const char *arizona_extcon_get_micbias(struct arizona_extcon_info *info)
+{
+ switch (info->micd_modes[0].bias >> ARIZONA_MICD_BIAS_SRC_SHIFT) {
+ case 1:
+ return "MICBIAS1";
+ case 2:
+ return "MICBIAS2";
+ case 3:
+ return "MICBIAS3";
+ default:
+ return "MICVDD";
+ }
+}
+
+static void arizona_extcon_pulse_micbias(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ const char *widget = arizona_extcon_get_micbias(info);
+ struct snd_soc_dapm_context *dapm = arizona->dapm;
+ int ret;
+
+ mutex_lock(&dapm->card->dapm_mutex);
+
+ ret = snd_soc_dapm_force_enable_pin(dapm, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to enable %s: %d\n",
+ widget, ret);
+
+ mutex_unlock(&dapm->card->dapm_mutex);
+
+ snd_soc_dapm_sync(dapm);
+
+ if (!arizona->pdata.micd_force_micbias) {
+ mutex_lock(&dapm->card->dapm_mutex);
+
+ ret = snd_soc_dapm_disable_pin(arizona->dapm, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to disable %s: %d\n",
+ widget, ret);
+
+ mutex_unlock(&dapm->card->dapm_mutex);
+
+ snd_soc_dapm_sync(dapm);
+ }
+}
+
static void arizona_start_mic(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
bool change;
int ret;
- info->detecting = true;
- info->mic = false;
- info->jack_flips = 0;
-
/* Microphone detection can't use idle mode */
pm_runtime_get(info->dev);
+ if (info->detecting) {
+ ret = regulator_allow_bypass(info->micvdd, false);
+ if (ret != 0) {
+ dev_err(arizona->dev,
+ "Failed to regulate MICVDD: %d\n",
+ ret);
+ }
+ }
+
ret = regulator_enable(info->micvdd);
if (ret != 0) {
dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
@@ -123,6 +194,12 @@ static void arizona_start_mic(struct arizona_extcon_info *info)
regmap_write(arizona->regmap, 0x80, 0x0);
}
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
+
+ arizona_extcon_pulse_micbias(info);
+
regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
&change);
@@ -135,18 +212,39 @@ static void arizona_start_mic(struct arizona_extcon_info *info)
static void arizona_stop_mic(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
+ const char *widget = arizona_extcon_get_micbias(info);
+ struct snd_soc_dapm_context *dapm = arizona->dapm;
bool change;
+ int ret;
regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, 0,
&change);
+ mutex_lock(&dapm->card->dapm_mutex);
+
+ ret = snd_soc_dapm_disable_pin(dapm, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev,
+ "Failed to disable %s: %d\n",
+ widget, ret);
+
+ mutex_unlock(&dapm->card->dapm_mutex);
+
+ snd_soc_dapm_sync(dapm);
+
if (info->micd_reva) {
regmap_write(arizona->regmap, 0x80, 0x3);
regmap_write(arizona->regmap, 0x294, 2);
regmap_write(arizona->regmap, 0x80, 0x0);
}
+ ret = regulator_allow_bypass(info->micvdd, true);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
+ ret);
+ }
+
if (change) {
regulator_disable(info->micvdd);
pm_runtime_mark_last_busy(info->dev);
@@ -154,6 +252,478 @@ static void arizona_stop_mic(struct arizona_extcon_info *info)
}
}
+static struct {
+ unsigned int factor_a;
+ unsigned int factor_b;
+} arizona_hpdet_b_ranges[] = {
+ { 5528, 362464 },
+ { 11084, 6186851 },
+ { 11065, 65460395 },
+};
+
+static struct {
+ int min;
+ int max;
+} arizona_hpdet_c_ranges[] = {
+ { 0, 30 },
+ { 8, 100 },
+ { 100, 1000 },
+ { 1000, 10000 },
+};
+
+static int arizona_hpdet_read(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ unsigned int val, range;
+ int ret;
+
+ ret = regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_2, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read HPDET status: %d\n",
+ ret);
+ return ret;
+ }
+
+ switch (info->hpdet_ip) {
+ case 0:
+ if (!(val & ARIZONA_HP_DONE)) {
+ dev_err(arizona->dev, "HPDET did not complete: %x\n",
+ val);
+ return -EAGAIN;
+ }
+
+ val &= ARIZONA_HP_LVL_MASK;
+ break;
+
+ case 1:
+ if (!(val & ARIZONA_HP_DONE_B)) {
+ dev_err(arizona->dev, "HPDET did not complete: %x\n",
+ val);
+ return -EAGAIN;
+ }
+
+ ret = regmap_read(arizona->regmap, ARIZONA_HP_DACVAL, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read HP value: %d\n",
+ ret);
+ return -EAGAIN;
+ }
+
+ regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
+ &range);
+ range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
+ >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
+
+ if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 &&
+ (val < 100 || val > 0x3fb)) {
+ range++;
+ dev_dbg(arizona->dev, "Moving to HPDET range %d\n",
+ range);
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_IMPEDANCE_RANGE_MASK,
+ range <<
+ ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
+ return -EAGAIN;
+ }
+
+ /* If we go out of range report top of range */
+ if (val < 100 || val > 0x3fb) {
+ dev_dbg(arizona->dev, "Measurement out of range\n");
+ return 10000;
+ }
+
+ dev_dbg(arizona->dev, "HPDET read %d in range %d\n",
+ val, range);
+
+ val = arizona_hpdet_b_ranges[range].factor_b
+ / ((val * 100) -
+ arizona_hpdet_b_ranges[range].factor_a);
+ break;
+
+ default:
+ dev_warn(arizona->dev, "Unknown HPDET IP revision %d\n",
+ info->hpdet_ip);
+ case 2:
+ if (!(val & ARIZONA_HP_DONE_B)) {
+ dev_err(arizona->dev, "HPDET did not complete: %x\n",
+ val);
+ return -EAGAIN;
+ }
+
+ val &= ARIZONA_HP_LVL_B_MASK;
+
+ regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
+ &range);
+ range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
+ >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
+
+ /* Skip up or down a range? */
+ if (range && (val < arizona_hpdet_c_ranges[range].min)) {
+ range--;
+ dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n",
+ arizona_hpdet_c_ranges[range].min,
+ arizona_hpdet_c_ranges[range].max);
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_IMPEDANCE_RANGE_MASK,
+ range <<
+ ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
+ return -EAGAIN;
+ }
+
+ if (range < ARRAY_SIZE(arizona_hpdet_c_ranges) - 1 &&
+ (val >= arizona_hpdet_c_ranges[range].max)) {
+ range++;
+ dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n",
+ arizona_hpdet_c_ranges[range].min,
+ arizona_hpdet_c_ranges[range].max);
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_IMPEDANCE_RANGE_MASK,
+ range <<
+ ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
+ return -EAGAIN;
+ }
+ }
+
+ dev_dbg(arizona->dev, "HP impedance %d ohms\n", val);
+ return val;
+}
+
+static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading)
+{
+ struct arizona *arizona = info->arizona;
+ int id_gpio = arizona->pdata.hpdet_id_gpio;
+
+ /*
+ * If we're using HPDET for accessory identification we need
+ * to take multiple measurements, step through them in sequence.
+ */
+ if (arizona->pdata.hpdet_acc_id) {
+ info->hpdet_res[info->num_hpdet_res++] = *reading;
+
+ /*
+ * If the impedence is too high don't measure the
+ * second ground.
+ */
+ if (info->num_hpdet_res == 1 && *reading >= 45) {
+ dev_dbg(arizona->dev, "Skipping ground flip\n");
+ info->hpdet_res[info->num_hpdet_res++] = *reading;
+ }
+
+ if (info->num_hpdet_res == 1) {
+ dev_dbg(arizona->dev, "Flipping ground\n");
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_SRC,
+ ~info->micd_modes[0].src);
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_POLL, ARIZONA_HP_POLL);
+ return -EAGAIN;
+ }
+
+ /* Only check the mic directly if we didn't already ID it */
+ if (id_gpio && info->num_hpdet_res == 2 &&
+ !((info->hpdet_res[0] > info->hpdet_res[1] * 2))) {
+ dev_dbg(arizona->dev, "Measuring mic\n");
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK |
+ ARIZONA_ACCDET_SRC,
+ ARIZONA_ACCDET_MODE_HPR |
+ info->micd_modes[0].src);
+
+ gpio_set_value_cansleep(id_gpio, 1);
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_POLL, ARIZONA_HP_POLL);
+ return -EAGAIN;
+ }
+
+ /* OK, got both. Now, compare... */
+ dev_dbg(arizona->dev, "HPDET measured %d %d %d\n",
+ info->hpdet_res[0], info->hpdet_res[1],
+ info->hpdet_res[2]);
+
+
+ /* Take the headphone impedance for the main report */
+ *reading = info->hpdet_res[0];
+
+ /*
+ * Either the two grounds measure differently or we
+ * measure the mic as high impedance.
+ */
+ if ((info->hpdet_res[0] > info->hpdet_res[1] * 2) ||
+ (id_gpio && info->hpdet_res[2] > 10)) {
+ dev_dbg(arizona->dev, "Detected mic\n");
+ info->mic = true;
+ info->detecting = true;
+ } else {
+ dev_dbg(arizona->dev, "Detected headphone\n");
+ }
+
+ /* Make sure everything is reset back to the real polarity */
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_SRC,
+ info->micd_modes[0].src);
+ }
+
+ return 0;
+}
+
+static irqreturn_t arizona_hpdet_irq(int irq, void *data)
+{
+ struct arizona_extcon_info *info = data;
+ struct arizona *arizona = info->arizona;
+ int id_gpio = arizona->pdata.hpdet_id_gpio;
+ int report = ARIZONA_CABLE_HEADPHONE;
+ unsigned int val;
+ int ret, reading;
+
+ mutex_lock(&info->lock);
+
+ /* If we got a spurious IRQ for some reason then ignore it */
+ if (!info->hpdet_active) {
+ dev_warn(arizona->dev, "Spurious HPDET IRQ\n");
+ mutex_unlock(&info->lock);
+ return IRQ_NONE;
+ }
+
+ /* If the cable was removed while measuring ignore the result */
+ ret = extcon_get_cable_state_(&info->edev, ARIZONA_CABLE_MECHANICAL);
+ if (ret < 0) {
+ dev_err(arizona->dev, "Failed to check cable state: %d\n",
+ ret);
+ goto out;
+ } else if (!ret) {
+ dev_dbg(arizona->dev, "Ignoring HPDET for removed cable\n");
+ goto done;
+ }
+
+ ret = arizona_hpdet_read(info);
+ if (ret == -EAGAIN) {
+ goto out;
+ } else if (ret < 0) {
+ goto done;
+ }
+ reading = ret;
+
+ /* Reset back to starting range */
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
+ 0);
+
+ ret = arizona_hpdet_do_id(info, &reading);
+ if (ret == -EAGAIN) {
+ goto out;
+ } else if (ret < 0) {
+ goto done;
+ }
+
+ /* Report high impedence cables as line outputs */
+ if (reading >= 5000)
+ report = ARIZONA_CABLE_LINEOUT;
+ else
+ report = ARIZONA_CABLE_HEADPHONE;
+
+ ret = extcon_set_cable_state_(&info->edev, report, true);
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to report HP/line: %d\n",
+ ret);
+
+ mutex_lock(&arizona->dapm->card->dapm_mutex);
+
+ ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read output enables: %d\n",
+ ret);
+ val = 0;
+ }
+
+ if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) {
+ ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, 0);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to undo magic: %d\n",
+ ret);
+
+ ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, 0);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to undo magic: %d\n",
+ ret);
+ }
+
+ mutex_unlock(&arizona->dapm->card->dapm_mutex);
+
+done:
+ if (id_gpio)
+ gpio_set_value_cansleep(id_gpio, 0);
+
+ /* Revert back to MICDET mode */
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
+
+ /* If we have a mic then reenable MICDET */
+ if (info->mic)
+ arizona_start_mic(info);
+
+ if (info->hpdet_active) {
+ pm_runtime_put_autosuspend(info->dev);
+ info->hpdet_active = false;
+ }
+
+ info->hpdet_done = true;
+
+out:
+ mutex_unlock(&info->lock);
+
+ return IRQ_HANDLED;
+}
+
+static void arizona_identify_headphone(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ int ret;
+
+ if (info->hpdet_done)
+ return;
+
+ dev_dbg(arizona->dev, "Starting HPDET\n");
+
+ /* Make sure we keep the device enabled during the measurement */
+ pm_runtime_get(info->dev);
+
+ info->hpdet_active = true;
+
+ if (info->mic)
+ arizona_stop_mic(info);
+
+ ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, 0x4000);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to do magic: %d\n", ret);
+
+ ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, 0x4000);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to do magic: %d\n", ret);
+
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK,
+ ARIZONA_ACCDET_MODE_HPL);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to set HPDETL mode: %d\n", ret);
+ goto err;
+ }
+
+ ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_POLL, ARIZONA_HP_POLL);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n",
+ ret);
+ goto err;
+ }
+
+ return;
+
+err:
+ regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
+
+ /* Just report headphone */
+ ret = extcon_update_state(&info->edev,
+ 1 << ARIZONA_CABLE_HEADPHONE,
+ 1 << ARIZONA_CABLE_HEADPHONE);
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
+
+ if (info->mic)
+ arizona_start_mic(info);
+
+ info->hpdet_active = false;
+}
+
+static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ unsigned int val;
+ int ret;
+
+ dev_dbg(arizona->dev, "Starting identification via HPDET\n");
+
+ /* Make sure we keep the device enabled during the measurement */
+ pm_runtime_get_sync(info->dev);
+
+ info->hpdet_active = true;
+
+ arizona_extcon_pulse_micbias(info);
+
+ mutex_lock(&arizona->dapm->card->dapm_mutex);
+
+ ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read output enables: %d\n",
+ ret);
+ val = 0;
+ }
+
+ if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) {
+ ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000,
+ 0x4000);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to do magic: %d\n",
+ ret);
+
+ ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000,
+ 0x4000);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to do magic: %d\n",
+ ret);
+ }
+
+ mutex_unlock(&arizona->dapm->card->dapm_mutex);
+
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_SRC | ARIZONA_ACCDET_MODE_MASK,
+ info->micd_modes[0].src |
+ ARIZONA_ACCDET_MODE_HPL);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to set HPDETL mode: %d\n", ret);
+ goto err;
+ }
+
+ ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
+ ARIZONA_HP_POLL, ARIZONA_HP_POLL);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n",
+ ret);
+ goto err;
+ }
+
+ return;
+
+err:
+ regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
+
+ /* Just report headphone */
+ ret = extcon_update_state(&info->edev,
+ 1 << ARIZONA_CABLE_HEADPHONE,
+ 1 << ARIZONA_CABLE_HEADPHONE);
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
+
+ info->hpdet_active = false;
+}
+
static irqreturn_t arizona_micdet(int irq, void *data)
{
struct arizona_extcon_info *info = data;
@@ -187,16 +757,23 @@ static irqreturn_t arizona_micdet(int irq, void *data)
/* If we got a high impedence we should have a headset, report it. */
if (info->detecting && (val & 0x400)) {
+ arizona_identify_headphone(info);
+
ret = extcon_update_state(&info->edev,
- 1 << ARIZONA_CABLE_MICROPHONE |
- 1 << ARIZONA_CABLE_HEADPHONE,
- 1 << ARIZONA_CABLE_MICROPHONE |
- 1 << ARIZONA_CABLE_HEADPHONE);
+ 1 << ARIZONA_CABLE_MICROPHONE,
+ 1 << ARIZONA_CABLE_MICROPHONE);
if (ret != 0)
dev_err(arizona->dev, "Headset report failed: %d\n",
ret);
+ /* Don't need to regulate for button detection */
+ ret = regulator_allow_bypass(info->micvdd, false);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
+ ret);
+ }
+
info->mic = true;
info->detecting = false;
goto handled;
@@ -209,20 +786,13 @@ static irqreturn_t arizona_micdet(int irq, void *data)
* impedence then give up and report headphones.
*/
if (info->detecting && (val & 0x3f8)) {
- info->jack_flips++;
-
if (info->jack_flips >= info->micd_num_modes) {
- dev_dbg(arizona->dev, "Detected headphone\n");
+ dev_dbg(arizona->dev, "Detected HP/line\n");
+ arizona_identify_headphone(info);
+
info->detecting = false;
- arizona_stop_mic(info);
- ret = extcon_set_cable_state_(&info->edev,
- ARIZONA_CABLE_HEADPHONE,
- true);
- if (ret != 0)
- dev_err(arizona->dev,
- "Headphone report failed: %d\n",
- ret);
+ arizona_stop_mic(info);
} else {
info->micd_mode++;
if (info->micd_mode == info->micd_num_modes)
@@ -258,13 +828,7 @@ static irqreturn_t arizona_micdet(int irq, void *data)
info->detecting = false;
arizona_stop_mic(info);
- ret = extcon_set_cable_state_(&info->edev,
- ARIZONA_CABLE_HEADPHONE,
- true);
- if (ret != 0)
- dev_err(arizona->dev,
- "Headphone report failed: %d\n",
- ret);
+ arizona_identify_headphone(info);
} else {
dev_warn(arizona->dev, "Button with no mic: %x\n",
val);
@@ -275,6 +839,7 @@ static irqreturn_t arizona_micdet(int irq, void *data)
input_report_key(info->input,
arizona_lvl_to_key[i].report, 0);
input_sync(info->input);
+ arizona_extcon_pulse_micbias(info);
}
handled:
@@ -284,17 +849,38 @@ handled:
return IRQ_HANDLED;
}
+static void arizona_hpdet_work(struct work_struct *work)
+{
+ struct arizona_extcon_info *info = container_of(work,
+ struct arizona_extcon_info,
+ hpdet_work.work);
+
+ mutex_lock(&info->lock);
+ arizona_start_hpdet_acc_id(info);
+ mutex_unlock(&info->lock);
+}
+
static irqreturn_t arizona_jackdet(int irq, void *data)
{
struct arizona_extcon_info *info = data;
struct arizona *arizona = info->arizona;
- unsigned int val;
+ unsigned int val, present, mask;
int ret, i;
pm_runtime_get_sync(info->dev);
+ cancel_delayed_work_sync(&info->hpdet_work);
+
mutex_lock(&info->lock);
+ if (arizona->pdata.jd_gpio5) {
+ mask = ARIZONA_MICD_CLAMP_STS;
+ present = 0;
+ } else {
+ mask = ARIZONA_JD1_STS;
+ present = ARIZONA_JD1_STS;
+ }
+
ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
@@ -304,7 +890,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
return IRQ_NONE;
}
- if (val & ARIZONA_JD1_STS) {
+ if ((val & mask) == present) {
dev_dbg(arizona->dev, "Detected jack\n");
ret = extcon_set_cable_state_(&info->edev,
ARIZONA_CABLE_MECHANICAL, true);
@@ -313,12 +899,31 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
dev_err(arizona->dev, "Mechanical report failed: %d\n",
ret);
- arizona_start_mic(info);
+ if (!arizona->pdata.hpdet_acc_id) {
+ info->detecting = true;
+ info->mic = false;
+ info->jack_flips = 0;
+
+ arizona_start_mic(info);
+ } else {
+ schedule_delayed_work(&info->hpdet_work,
+ msecs_to_jiffies(250));
+ }
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB, 0);
} else {
dev_dbg(arizona->dev, "Detected jack removal\n");
arizona_stop_mic(info);
+ info->num_hpdet_res = 0;
+ for (i = 0; i < ARRAY_SIZE(info->hpdet_res); i++)
+ info->hpdet_res[i] = 0;
+ info->mic = false;
+ info->hpdet_done = false;
+
for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
input_report_key(info->input,
arizona_lvl_to_key[i].report, 0);
@@ -328,8 +933,20 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
if (ret != 0)
dev_err(arizona->dev, "Removal report failed: %d\n",
ret);
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB,
+ ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB);
}
+ /* Clear trig_sts to make sure DCVDD is not forced up */
+ regmap_write(arizona->regmap, ARIZONA_AOD_WKUP_AND_TRIG,
+ ARIZONA_MICD_CLAMP_FALL_TRIG_STS |
+ ARIZONA_MICD_CLAMP_RISE_TRIG_STS |
+ ARIZONA_JD1_FALL_TRIG_STS |
+ ARIZONA_JD1_RISE_TRIG_STS);
+
mutex_unlock(&info->lock);
pm_runtime_mark_last_busy(info->dev);
@@ -343,8 +960,12 @@ static int arizona_extcon_probe(struct platform_device *pdev)
struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
struct arizona_pdata *pdata;
struct arizona_extcon_info *info;
+ int jack_irq_fall, jack_irq_rise;
int ret, mode, i;
+ if (!arizona->dapm || !arizona->dapm->card)
+ return -EPROBE_DEFER;
+
pdata = dev_get_platdata(arizona->dev);
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
@@ -364,7 +985,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
mutex_init(&info->lock);
info->arizona = arizona;
info->dev = &pdev->dev;
- info->detecting = true;
+ INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work);
platform_set_drvdata(pdev, info);
switch (arizona->type) {
@@ -374,6 +995,8 @@ static int arizona_extcon_probe(struct platform_device *pdev)
info->micd_reva = true;
break;
default:
+ info->micd_clamp = true;
+ info->hpdet_ip = 1;
break;
}
break;
@@ -416,9 +1039,64 @@ static int arizona_extcon_probe(struct platform_device *pdev)
}
}
+ if (arizona->pdata.hpdet_id_gpio > 0) {
+ ret = devm_gpio_request_one(&pdev->dev,
+ arizona->pdata.hpdet_id_gpio,
+ GPIOF_OUT_INIT_LOW,
+ "HPDET");
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
+ arizona->pdata.hpdet_id_gpio, ret);
+ goto err_register;
+ }
+ }
+
+ if (arizona->pdata.micd_bias_start_time)
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_BIAS_STARTTIME_MASK,
+ arizona->pdata.micd_bias_start_time
+ << ARIZONA_MICD_BIAS_STARTTIME_SHIFT);
+
+ if (arizona->pdata.micd_rate)
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_RATE_MASK,
+ arizona->pdata.micd_rate
+ << ARIZONA_MICD_RATE_SHIFT);
+
+ if (arizona->pdata.micd_dbtime)
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_DBTIME_MASK,
+ arizona->pdata.micd_dbtime
+ << ARIZONA_MICD_DBTIME_SHIFT);
+
+ /*
+ * If we have a clamp use it, activating in conjunction with
+ * GPIO5 if that is connected for jack detect operation.
+ */
+ if (info->micd_clamp) {
+ if (arizona->pdata.jd_gpio5) {
+ /* Put the GPIO into input mode */
+ regmap_write(arizona->regmap, ARIZONA_GPIO5_CTRL,
+ 0xc101);
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_MICD_CLAMP_CONTROL,
+ ARIZONA_MICD_CLAMP_MODE_MASK, 0x9);
+ } else {
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_MICD_CLAMP_CONTROL,
+ ARIZONA_MICD_CLAMP_MODE_MASK, 0x4);
+ }
+
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_MICD_CLAMP_DB,
+ ARIZONA_MICD_CLAMP_DB);
+ }
+
arizona_extcon_set_mode(info, 0);
- info->input = input_allocate_device();
+ info->input = devm_input_allocate_device(&pdev->dev);
if (!info->input) {
dev_err(arizona->dev, "Can't allocate input dev\n");
ret = -ENOMEM;
@@ -436,7 +1114,15 @@ static int arizona_extcon_probe(struct platform_device *pdev)
pm_runtime_idle(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
- ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
+ if (arizona->pdata.jd_gpio5) {
+ jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE;
+ jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL;
+ } else {
+ jack_irq_rise = ARIZONA_IRQ_JD_RISE;
+ jack_irq_fall = ARIZONA_IRQ_JD_FALL;
+ }
+
+ ret = arizona_request_irq(arizona, jack_irq_rise,
"JACKDET rise", arizona_jackdet, info);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
@@ -444,21 +1130,21 @@ static int arizona_extcon_probe(struct platform_device *pdev)
goto err_input;
}
- ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
+ ret = arizona_set_irq_wake(arizona, jack_irq_rise, 1);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
ret);
goto err_rise;
}
- ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
+ ret = arizona_request_irq(arizona, jack_irq_fall,
"JACKDET fall", arizona_jackdet, info);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
goto err_rise_wake;
}
- ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
+ ret = arizona_set_irq_wake(arizona, jack_irq_fall, 1);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
ret);
@@ -472,11 +1158,12 @@ static int arizona_extcon_probe(struct platform_device *pdev)
goto err_fall_wake;
}
- regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
- ARIZONA_MICD_BIAS_STARTTIME_MASK |
- ARIZONA_MICD_RATE_MASK,
- 7 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT |
- 8 << ARIZONA_MICD_RATE_SHIFT);
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_HPDET,
+ "HPDET", arizona_hpdet_irq, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get HPDET IRQ: %d\n", ret);
+ goto err_micdet;
+ }
arizona_clk32k_enable(arizona);
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
@@ -494,23 +1181,24 @@ static int arizona_extcon_probe(struct platform_device *pdev)
ret = input_register_device(info->input);
if (ret) {
dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
- goto err_micdet;
+ goto err_hpdet;
}
return 0;
+err_hpdet:
+ arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info);
err_micdet:
arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
err_fall_wake:
- arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
+ arizona_set_irq_wake(arizona, jack_irq_fall, 0);
err_fall:
- arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
+ arizona_free_irq(arizona, jack_irq_fall, info);
err_rise_wake:
- arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
+ arizona_set_irq_wake(arizona, jack_irq_rise, 0);
err_rise:
- arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
+ arizona_free_irq(arizona, jack_irq_rise, info);
err_input:
- input_free_device(info->input);
err_register:
pm_runtime_disable(&pdev->dev);
extcon_dev_unregister(&info->edev);
@@ -522,18 +1210,32 @@ static int arizona_extcon_remove(struct platform_device *pdev)
{
struct arizona_extcon_info *info = platform_get_drvdata(pdev);
struct arizona *arizona = info->arizona;
+ int jack_irq_rise, jack_irq_fall;
pm_runtime_disable(&pdev->dev);
- arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
- arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
+ regmap_update_bits(arizona->regmap,
+ ARIZONA_MICD_CLAMP_CONTROL,
+ ARIZONA_MICD_CLAMP_MODE_MASK, 0);
+
+ if (arizona->pdata.jd_gpio5) {
+ jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE;
+ jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL;
+ } else {
+ jack_irq_rise = ARIZONA_IRQ_JD_RISE;
+ jack_irq_fall = ARIZONA_IRQ_JD_FALL;
+ }
+
+ arizona_set_irq_wake(arizona, jack_irq_rise, 0);
+ arizona_set_irq_wake(arizona, jack_irq_fall, 0);
+ arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info);
arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
- arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
- arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
+ arizona_free_irq(arizona, jack_irq_rise, info);
+ arizona_free_irq(arizona, jack_irq_fall, info);
+ cancel_delayed_work_sync(&info->hpdet_work);
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
ARIZONA_JD1_ENA, 0);
arizona_clk32k_disable(arizona);
- input_unregister_device(info->input);
extcon_dev_unregister(&info->edev);
return 0;
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index 1b14bfcdc17..02bec32adde 100644
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -29,7 +29,7 @@
#include <linux/workqueue.h>
#include <linux/gpio.h>
#include <linux/extcon.h>
-#include <linux/extcon/extcon_gpio.h>
+#include <linux/extcon/extcon-gpio.h>
struct gpio_extcon_data {
struct extcon_dev edev;
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
index 8c17b65eb74..b70e3815c45 100644
--- a/drivers/extcon/extcon-max77693.c
+++ b/drivers/extcon/extcon-max77693.c
@@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
+#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/platform_device.h>
@@ -29,92 +30,7 @@
#include <linux/irqdomain.h>
#define DEV_NAME "max77693-muic"
-
-/* MAX77693 MUIC - STATUS1~3 Register */
-#define STATUS1_ADC_SHIFT (0)
-#define STATUS1_ADCLOW_SHIFT (5)
-#define STATUS1_ADCERR_SHIFT (6)
-#define STATUS1_ADC1K_SHIFT (7)
-#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
-#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
-#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
-#define STATUS1_ADC1K_MASK (0x1 << STATUS1_ADC1K_SHIFT)
-
-#define STATUS2_CHGTYP_SHIFT (0)
-#define STATUS2_CHGDETRUN_SHIFT (3)
-#define STATUS2_DCDTMR_SHIFT (4)
-#define STATUS2_DXOVP_SHIFT (5)
-#define STATUS2_VBVOLT_SHIFT (6)
-#define STATUS2_VIDRM_SHIFT (7)
-#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
-#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
-#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
-#define STATUS2_DXOVP_MASK (0x1 << STATUS2_DXOVP_SHIFT)
-#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
-#define STATUS2_VIDRM_MASK (0x1 << STATUS2_VIDRM_SHIFT)
-
-#define STATUS3_OVP_SHIFT (2)
-#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
-
-/* MAX77693 CDETCTRL1~2 register */
-#define CDETCTRL1_CHGDETEN_SHIFT (0)
-#define CDETCTRL1_CHGTYPMAN_SHIFT (1)
-#define CDETCTRL1_DCDEN_SHIFT (2)
-#define CDETCTRL1_DCD2SCT_SHIFT (3)
-#define CDETCTRL1_CDDELAY_SHIFT (4)
-#define CDETCTRL1_DCDCPL_SHIFT (5)
-#define CDETCTRL1_CDPDET_SHIFT (7)
-#define CDETCTRL1_CHGDETEN_MASK (0x1 << CDETCTRL1_CHGDETEN_SHIFT)
-#define CDETCTRL1_CHGTYPMAN_MASK (0x1 << CDETCTRL1_CHGTYPMAN_SHIFT)
-#define CDETCTRL1_DCDEN_MASK (0x1 << CDETCTRL1_DCDEN_SHIFT)
-#define CDETCTRL1_DCD2SCT_MASK (0x1 << CDETCTRL1_DCD2SCT_SHIFT)
-#define CDETCTRL1_CDDELAY_MASK (0x1 << CDETCTRL1_CDDELAY_SHIFT)
-#define CDETCTRL1_DCDCPL_MASK (0x1 << CDETCTRL1_DCDCPL_SHIFT)
-#define CDETCTRL1_CDPDET_MASK (0x1 << CDETCTRL1_CDPDET_SHIFT)
-
-#define CDETCTRL2_VIDRMEN_SHIFT (1)
-#define CDETCTRL2_DXOVPEN_SHIFT (3)
-#define CDETCTRL2_VIDRMEN_MASK (0x1 << CDETCTRL2_VIDRMEN_SHIFT)
-#define CDETCTRL2_DXOVPEN_MASK (0x1 << CDETCTRL2_DXOVPEN_SHIFT)
-
-/* MAX77693 MUIC - CONTROL1~3 register */
-#define COMN1SW_SHIFT (0)
-#define COMP2SW_SHIFT (3)
-#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
-#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
-#define COMP_SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
-#define CONTROL1_SW_USB ((1 << COMP2SW_SHIFT) \
- | (1 << COMN1SW_SHIFT))
-#define CONTROL1_SW_AUDIO ((2 << COMP2SW_SHIFT) \
- | (2 << COMN1SW_SHIFT))
-#define CONTROL1_SW_UART ((3 << COMP2SW_SHIFT) \
- | (3 << COMN1SW_SHIFT))
-#define CONTROL1_SW_OPEN ((0 << COMP2SW_SHIFT) \
- | (0 << COMN1SW_SHIFT))
-
-#define CONTROL2_LOWPWR_SHIFT (0)
-#define CONTROL2_ADCEN_SHIFT (1)
-#define CONTROL2_CPEN_SHIFT (2)
-#define CONTROL2_SFOUTASRT_SHIFT (3)
-#define CONTROL2_SFOUTORD_SHIFT (4)
-#define CONTROL2_ACCDET_SHIFT (5)
-#define CONTROL2_USBCPINT_SHIFT (6)
-#define CONTROL2_RCPS_SHIFT (7)
-#define CONTROL2_LOWPWR_MASK (0x1 << CONTROL2_LOWPWR_SHIFT)
-#define CONTROL2_ADCEN_MASK (0x1 << CONTROL2_ADCEN_SHIFT)
-#define CONTROL2_CPEN_MASK (0x1 << CONTROL2_CPEN_SHIFT)
-#define CONTROL2_SFOUTASRT_MASK (0x1 << CONTROL2_SFOUTASRT_SHIFT)
-#define CONTROL2_SFOUTORD_MASK (0x1 << CONTROL2_SFOUTORD_SHIFT)
-#define CONTROL2_ACCDET_MASK (0x1 << CONTROL2_ACCDET_SHIFT)
-#define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT)
-#define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT)
-
-#define CONTROL3_JIGSET_SHIFT (0)
-#define CONTROL3_BTLDSET_SHIFT (2)
-#define CONTROL3_ADCDBSET_SHIFT (4)
-#define CONTROL3_JIGSET_MASK (0x3 << CONTROL3_JIGSET_SHIFT)
-#define CONTROL3_BTLDSET_MASK (0x3 << CONTROL3_BTLDSET_SHIFT)
-#define CONTROL3_ADCDBSET_MASK (0x3 << CONTROL3_ADCDBSET_SHIFT)
+#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
enum max77693_muic_adc_debounce_time {
ADC_DEBOUNCE_TIME_5MS = 0,
@@ -127,14 +43,40 @@ struct max77693_muic_info {
struct device *dev;
struct max77693_dev *max77693;
struct extcon_dev *edev;
- int prev_adc;
- int prev_adc_gnd;
+ int prev_cable_type;
+ int prev_cable_type_gnd;
int prev_chg_type;
+ int prev_button_type;
u8 status[2];
int irq;
struct work_struct irq_work;
struct mutex mutex;
+
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+
+ /* Button of dock device */
+ struct input_dev *dock;
+
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ int path_usb;
+ int path_uart;
+};
+
+enum max77693_muic_cable_group {
+ MAX77693_CABLE_GROUP_ADC = 0,
+ MAX77693_CABLE_GROUP_ADC_GND,
+ MAX77693_CABLE_GROUP_CHG,
+ MAX77693_CABLE_GROUP_VBVOLT,
};
enum max77693_muic_charger_type {
@@ -215,27 +157,59 @@ enum max77693_muic_acc_type {
/* The below accessories have same ADC value so ADCLow and
ADC1K bit is used to separate specific accessory */
- MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, ADCLow:0, ADC1K:0 */
- MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */
- MAX77693_MUIC_GND_MHL_CABLE = 0x103, /* ADC:0x0, ADCLow:1, ADC1K:1 */
+ MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, VBVolot:0, ADCLow:0, ADC1K:0 */
+ MAX77693_MUIC_GND_USB_OTG_VB = 0x104, /* ADC:0x0, VBVolot:1, ADCLow:0, ADC1K:0 */
+ MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:0 */
+ MAX77693_MUIC_GND_MHL = 0x103, /* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:1 */
+ MAX77693_MUIC_GND_MHL_VB = 0x107, /* ADC:0x0, VBVolot:1, ADCLow:1, ADC1K:1 */
};
/* MAX77693 MUIC device support below list of accessories(external connector) */
-const char *max77693_extcon_cable[] = {
- [0] = "USB",
- [1] = "USB-Host",
- [2] = "TA",
- [3] = "Fast-charger",
- [4] = "Slow-charger",
- [5] = "Charge-downstream",
- [6] = "MHL",
- [7] = "Audio-video-load",
- [8] = "Audio-video-noload",
- [9] = "JIG",
+enum {
+ EXTCON_CABLE_USB = 0,
+ EXTCON_CABLE_USB_HOST,
+ EXTCON_CABLE_TA,
+ EXTCON_CABLE_FAST_CHARGER,
+ EXTCON_CABLE_SLOW_CHARGER,
+ EXTCON_CABLE_CHARGE_DOWNSTREAM,
+ EXTCON_CABLE_MHL,
+ EXTCON_CABLE_MHL_TA,
+ EXTCON_CABLE_JIG_USB_ON,
+ EXTCON_CABLE_JIG_USB_OFF,
+ EXTCON_CABLE_JIG_UART_OFF,
+ EXTCON_CABLE_JIG_UART_ON,
+ EXTCON_CABLE_DOCK_SMART,
+ EXTCON_CABLE_DOCK_DESK,
+ EXTCON_CABLE_DOCK_AUDIO,
+
+ _EXTCON_CABLE_NUM,
+};
+
+static const char *max77693_extcon_cable[] = {
+ [EXTCON_CABLE_USB] = "USB",
+ [EXTCON_CABLE_USB_HOST] = "USB-Host",
+ [EXTCON_CABLE_TA] = "TA",
+ [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
+ [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
+ [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
+ [EXTCON_CABLE_MHL] = "MHL",
+ [EXTCON_CABLE_MHL_TA] = "MHL_TA",
+ [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON",
+ [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
+ [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
+ [EXTCON_CABLE_JIG_UART_ON] = "Dock-Car",
+ [EXTCON_CABLE_DOCK_SMART] = "Dock-Smart",
+ [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
+ [EXTCON_CABLE_DOCK_AUDIO] = "Dock-Audio",
NULL,
};
+/*
+ * max77693_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max77693 MUIC
+ * @time: the debounce time of ADC
+ */
static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
enum max77693_muic_adc_debounce_time time)
{
@@ -250,18 +224,29 @@ static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
MAX77693_MUIC_REG_CTRL3,
time << CONTROL3_ADCDBSET_SHIFT,
CONTROL3_ADCDBSET_MASK);
- if (ret)
+ if (ret) {
dev_err(info->dev, "failed to set ADC debounce time\n");
+ return -EAGAIN;
+ }
break;
default:
dev_err(info->dev, "invalid ADC debounce time\n");
- ret = -EINVAL;
- break;
+ return -EINVAL;
}
- return ret;
+ return 0;
};
+/*
+ * max77693_muic_set_path - Set hardware line according to attached cable
+ * @info: the instance including private data of max77693 MUIC
+ * @value: the path according to attached cable
+ * @attached: the state of cable (true:attached, false:detached)
+ *
+ * The max77693 MUIC device share outside H/W line among a varity of cables
+ * so, this function set internal path of H/W line according to the type of
+ * attached cable.
+ */
static int max77693_muic_set_path(struct max77693_muic_info *info,
u8 val, bool attached)
{
@@ -277,7 +262,7 @@ static int max77693_muic_set_path(struct max77693_muic_info *info,
MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
if (ret < 0) {
dev_err(info->dev, "failed to update MUIC register\n");
- goto out;
+ return -EAGAIN;
}
if (attached)
@@ -290,141 +275,457 @@ static int max77693_muic_set_path(struct max77693_muic_info *info,
CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
if (ret < 0) {
dev_err(info->dev, "failed to update MUIC register\n");
- goto out;
+ return -EAGAIN;
}
dev_info(info->dev,
"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
ctrl1, ctrl2, attached ? "attached" : "detached");
-out:
- return ret;
+
+ return 0;
}
-static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info,
- bool attached)
+/*
+ * max77693_muic_get_cable_type - Return cable type and check cable state
+ * @info: the instance including private data of max77693 MUIC
+ * @group: the path according to attached cable
+ * @attached: store cable state and return
+ *
+ * This function check the cable state either attached or detached,
+ * and then divide precise type of cable according to cable group.
+ * - MAX77693_CABLE_GROUP_ADC
+ * - MAX77693_CABLE_GROUP_ADC_GND
+ * - MAX77693_CABLE_GROUP_CHG
+ * - MAX77693_CABLE_GROUP_VBVOLT
+ */
+static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
+ enum max77693_muic_cable_group group, bool *attached)
{
- int ret = 0;
- int type;
- int adc, adc1k, adclow;
+ int cable_type = 0;
+ int adc;
+ int adc1k;
+ int adclow;
+ int vbvolt;
+ int chg_type;
+
+ switch (group) {
+ case MAX77693_CABLE_GROUP_ADC:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ /*
+ * Check current cable state/cable type and store cable type
+ * (info->prev_cable_type) for handling cable when cable is
+ * detached.
+ */
+ if (adc == MAX77693_MUIC_ADC_OPEN) {
+ *attached = false;
+
+ cable_type = info->prev_cable_type;
+ info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ cable_type = info->prev_cable_type = adc;
+ }
+ break;
+ case MAX77693_CABLE_GROUP_ADC_GND:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ /*
+ * Check current cable state/cable type and store cable type
+ * (info->prev_cable_type/_gnd) for handling cable when cable
+ * is detached.
+ */
+ if (adc == MAX77693_MUIC_ADC_OPEN) {
+ *attached = false;
+
+ cable_type = info->prev_cable_type_gnd;
+ info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ adclow = info->status[0] & STATUS1_ADCLOW_MASK;
+ adclow >>= STATUS1_ADCLOW_SHIFT;
+ adc1k = info->status[0] & STATUS1_ADC1K_MASK;
+ adc1k >>= STATUS1_ADC1K_SHIFT;
+
+ vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
+ vbvolt >>= STATUS2_VBVOLT_SHIFT;
+
+ /**
+ * [0x1][VBVolt][ADCLow][ADC1K]
+ * [0x1 0 0 0 ] : USB_OTG
+ * [0x1 1 0 0 ] : USB_OTG_VB
+ * [0x1 0 1 0 ] : Audio Video Cable with load
+ * [0x1 0 1 1 ] : MHL without charging connector
+ * [0x1 1 1 1 ] : MHL with charging connector
+ */
+ cable_type = ((0x1 << 8)
+ | (vbvolt << 2)
+ | (adclow << 1)
+ | adc1k);
+
+ info->prev_cable_type = adc;
+ info->prev_cable_type_gnd = cable_type;
+ }
- if (attached) {
+ break;
+ case MAX77693_CABLE_GROUP_CHG:
+ /*
+ * Read charger type to check cable type and decide cable state
+ * according to type of charger cable.
+ */
+ chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
+ *attached = false;
+
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
+ } else {
+ *attached = true;
+
+ /*
+ * Check current cable state/cable type and store cable
+ * type(info->prev_chg_type) for handling cable when
+ * charger cable is detached.
+ */
+ cable_type = info->prev_chg_type = chg_type;
+ }
+
+ break;
+ case MAX77693_CABLE_GROUP_VBVOLT:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
adc = info->status[0] & STATUS1_ADC_MASK;
- adclow = info->status[0] & STATUS1_ADCLOW_MASK;
- adclow >>= STATUS1_ADCLOW_SHIFT;
- adc1k = info->status[0] & STATUS1_ADC1K_MASK;
- adc1k >>= STATUS1_ADC1K_SHIFT;
-
- /**
- * [0x1][ADCLow][ADC1K]
- * [0x1 0 0 ] : USB_OTG
- * [0x1 1 0 ] : Audio Video Cable with load
- * [0x1 1 1 ] : MHL
+ adc >>= STATUS1_ADC_SHIFT;
+ chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ if (adc == MAX77693_MUIC_ADC_OPEN
+ && chg_type == MAX77693_CHARGER_TYPE_NONE)
+ *attached = false;
+ else
+ *attached = true;
+
+ /*
+ * Read vbvolt field, if vbvolt is 1,
+ * this cable is used for charging.
+ */
+ vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
+ vbvolt >>= STATUS2_VBVOLT_SHIFT;
+
+ cable_type = vbvolt;
+ break;
+ default:
+ dev_err(info->dev, "Unknown cable group (%d)\n", group);
+ cable_type = -EINVAL;
+ break;
+ }
+
+ return cable_type;
+}
+
+static int max77693_muic_dock_handler(struct max77693_muic_info *info,
+ int cable_type, bool attached)
+{
+ int ret = 0;
+ int vbvolt;
+ bool cable_attached;
+ char dock_name[CABLE_NAME_MAX];
+
+ dev_info(info->dev,
+ "external connector is %s (adc:0x%02x)\n",
+ attached ? "attached" : "detached", cable_type);
+
+ switch (cable_type) {
+ case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
+ /*
+ * Check power cable whether attached or detached state.
+ * The Dock-Smart device need surely external power supply.
+ * If power cable(USB/TA) isn't connected to Dock device,
+ * user can't use Dock-Smart for desktop mode.
+ */
+ vbvolt = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
+ if (attached && !vbvolt) {
+ dev_warn(info->dev,
+ "Cannot detect external power supply\n");
+ return 0;
+ }
+
+ /*
+ * Notify Dock-Smart/MHL state.
+ * - Dock-Smart device include three type of cable which
+ * are HDMI, USB for mouse/keyboard and micro-usb port
+ * for USB/TA cable. Dock-Smart device need always exteranl
+ * power supply(USB/TA cable through micro-usb cable). Dock-
+ * Smart device support screen output of target to separate
+ * monitor and mouse/keyboard for desktop mode.
+ *
+ * Features of 'USB/TA cable with Dock-Smart device'
+ * - Support MHL
+ * - Support external output feature of audio
+ * - Support charging through micro-usb port without data
+ * connection if TA cable is connected to target.
+ * - Support charging and data connection through micro-usb port
+ * if USB cable is connected between target and host
+ * device.
+ * - Support OTG device (Mouse/Keyboard)
*/
- type = ((0x1 << 8) | (adclow << 1) | adc1k);
+ ret = max77693_muic_set_path(info, info->path_usb, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_cable_state(info->edev, "Dock-Smart", attached);
+ extcon_set_cable_state(info->edev, "MHL", attached);
+ goto out;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* Dock-Car */
+ strcpy(dock_name, "Dock-Car");
+ break;
+ case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
+ strcpy(dock_name, "Dock-Desk");
+ break;
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
+ strcpy(dock_name, "Dock-Audio");
+ if (!attached)
+ extcon_set_cable_state(info->edev, "USB", false);
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s dock device\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
+ }
+
+ /* Dock-Car/Desk/Audio, PATH:AUDIO */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_cable_state(info->edev, dock_name, attached);
+
+out:
+ return 0;
+}
+
+static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
+ int button_type, bool attached)
+{
+ struct input_dev *dock = info->dock;
+ unsigned int code;
+
+ switch (button_type) {
+ case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
+ ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
+ /* DOCK_KEY_PREV */
+ code = KEY_PREVIOUSSONG;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
+ ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
+ /* DOCK_KEY_NEXT */
+ code = KEY_NEXTSONG;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
+ /* DOCK_VOL_DOWN */
+ code = KEY_VOLUMEDOWN;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
+ /* DOCK_VOL_UP */
+ code = KEY_VOLUMEUP;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
+ ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
+ /* DOCK_KEY_PLAY_PAUSE */
+ code = KEY_PLAYPAUSE;
+ break;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s key (adc:0x%x)\n",
+ attached ? "pressed" : "released", button_type);
+ return -EINVAL;
+ }
+
+ input_event(dock, EV_KEY, code, attached);
+ input_sync(dock);
+
+ return 0;
+}
- /* Store previous ADC value to handle accessory
- when accessory will be detached */
- info->prev_adc = adc;
- info->prev_adc_gnd = type;
- } else
- type = info->prev_adc_gnd;
+static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
+{
+ int cable_type_gnd;
+ int ret = 0;
+ bool attached;
- switch (type) {
+ cable_type_gnd = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_ADC_GND, &attached);
+
+ switch (cable_type_gnd) {
case MAX77693_MUIC_GND_USB_OTG:
- /* USB_OTG */
+ case MAX77693_MUIC_GND_USB_OTG_VB:
+ /* USB_OTG, PATH: AP_USB */
ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
if (ret < 0)
- goto out;
+ return ret;
extcon_set_cable_state(info->edev, "USB-Host", attached);
break;
case MAX77693_MUIC_GND_AV_CABLE_LOAD:
- /* Audio Video Cable with load */
+ /* Audio Video Cable with load, PATH:AUDIO */
ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
if (ret < 0)
- goto out;
+ return ret;
extcon_set_cable_state(info->edev,
"Audio-video-load", attached);
break;
- case MAX77693_MUIC_GND_MHL_CABLE:
- /* MHL */
+ case MAX77693_MUIC_GND_MHL:
+ case MAX77693_MUIC_GND_MHL_VB:
+ /* MHL or MHL with USB/TA cable */
extcon_set_cable_state(info->edev, "MHL", attached);
break;
default:
- dev_err(info->dev, "failed to detect %s accessory\n",
+ dev_err(info->dev, "failed to detect %s cable of gnd type\n",
attached ? "attached" : "detached");
- dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n",
- adc, adclow, adc1k);
- ret = -EINVAL;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int max77693_muic_jig_handler(struct max77693_muic_info *info,
+ int cable_type, bool attached)
+{
+ char cable_name[32];
+ int ret = 0;
+ u8 path = CONTROL1_SW_OPEN;
+
+ dev_info(info->dev,
+ "external connector is %s (adc:0x%02x)\n",
+ attached ? "attached" : "detached", cable_type);
+
+ switch (cable_type) {
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
+ /* PATH:AP_USB */
+ strcpy(cable_name, "JIG-USB-OFF");
+ path = CONTROL1_SW_USB;
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
+ /* PATH:AP_USB */
+ strcpy(cable_name, "JIG-USB-ON");
+ path = CONTROL1_SW_USB;
break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
+ /* PATH:AP_UART */
+ strcpy(cable_name, "JIG-UART-OFF");
+ path = CONTROL1_SW_UART;
+ break;
+ default:
+ dev_err(info->dev, "failed to detect %s jig cable\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
}
-out:
- return ret;
+ ret = max77693_muic_set_path(info, path, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_cable_state(info->edev, cable_name, attached);
+
+ return 0;
}
-static int max77693_muic_adc_handler(struct max77693_muic_info *info,
- int curr_adc, bool attached)
+static int max77693_muic_adc_handler(struct max77693_muic_info *info)
{
+ int cable_type;
+ int button_type;
+ bool attached;
int ret = 0;
- int adc;
- if (attached) {
- /* Store ADC value to handle accessory
- when accessory will be detached */
- info->prev_adc = curr_adc;
- adc = curr_adc;
- } else
- adc = info->prev_adc;
+ /* Check accessory state which is either detached or attached */
+ cable_type = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_ADC, &attached);
dev_info(info->dev,
"external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
- attached ? "attached" : "detached", curr_adc, info->prev_adc);
+ attached ? "attached" : "detached", cable_type,
+ info->prev_cable_type);
- switch (adc) {
+ switch (cable_type) {
case MAX77693_MUIC_ADC_GROUND:
/* USB_OTG/MHL/Audio */
- max77693_muic_adc_ground_handler(info, attached);
+ max77693_muic_adc_ground_handler(info);
break;
case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
- /* USB */
- ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
- if (ret < 0)
- goto out;
- extcon_set_cable_state(info->edev, "USB", attached);
- break;
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
- case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
/* JIG */
- ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached);
+ ret = max77693_muic_jig_handler(info, cable_type, attached);
if (ret < 0)
- goto out;
- extcon_set_cable_state(info->edev, "JIG", attached);
+ return ret;
break;
- case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
- /* Audio Video cable with no-load */
- ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
+ case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* Dock-Car */
+ case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
+ /*
+ * DOCK device
+ *
+ * The MAX77693 MUIC device can detect total 34 cable type
+ * except of charger cable and MUIC device didn't define
+ * specfic role of cable in the range of from 0x01 to 0x12
+ * of ADC value. So, can use/define cable with no role according
+ * to schema of hardware board.
+ */
+ ret = max77693_muic_dock_handler(info, cable_type, attached);
if (ret < 0)
- goto out;
- extcon_set_cable_state(info->edev,
- "Audio-video-noload", attached);
+ return ret;
+ break;
+ case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
+ case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
+ case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
+ case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
+ case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
+ /*
+ * Button of DOCK device
+ * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
+ *
+ * The MAX77693 MUIC device can detect total 34 cable type
+ * except of charger cable and MUIC device didn't define
+ * specfic role of cable in the range of from 0x01 to 0x12
+ * of ADC value. So, can use/define cable with no role according
+ * to schema of hardware board.
+ */
+ if (attached)
+ button_type = info->prev_button_type = cable_type;
+ else
+ button_type = info->prev_button_type;
+
+ ret = max77693_muic_dock_button_handler(info, button_type,
+ attached);
+ if (ret < 0)
+ return ret;
break;
case MAX77693_MUIC_ADC_SEND_END_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:
case MAX77693_MUIC_ADC_RESERVED_ACC_1:
case MAX77693_MUIC_ADC_RESERVED_ACC_2:
- case MAX77693_MUIC_ADC_RESERVED_ACC_3:
case MAX77693_MUIC_ADC_RESERVED_ACC_4:
case MAX77693_MUIC_ADC_RESERVED_ACC_5:
case MAX77693_MUIC_ADC_CEA936_AUDIO:
@@ -432,60 +733,164 @@ static int max77693_muic_adc_handler(struct max77693_muic_info *info,
case MAX77693_MUIC_ADC_TTY_CONVERTER:
case MAX77693_MUIC_ADC_UART_CABLE:
case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
- case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
- /* This accessory isn't used in general case if it is specially
- needed to detect additional accessory, should implement
- proper operation when this accessory is attached/detached. */
+ /*
+ * This accessory isn't used in general case if it is specially
+ * needed to detect additional accessory, should implement
+ * proper operation when this accessory is attached/detached.
+ */
dev_info(info->dev,
"accessory is %s but it isn't used (adc:0x%x)\n",
- attached ? "attached" : "detached", adc);
- goto out;
+ attached ? "attached" : "detached", cable_type);
+ return -EAGAIN;
default:
dev_err(info->dev,
"failed to detect %s accessory (adc:0x%x)\n",
- attached ? "attached" : "detached", adc);
- ret = -EINVAL;
- goto out;
+ attached ? "attached" : "detached", cable_type);
+ return -EINVAL;
}
-out:
- return ret;
+ return 0;
}
-static int max77693_muic_chg_handler(struct max77693_muic_info *info,
- int curr_chg_type, bool attached)
+static int max77693_muic_chg_handler(struct max77693_muic_info *info)
{
- int ret = 0;
int chg_type;
+ int cable_type_gnd;
+ int cable_type;
+ bool attached;
+ bool cable_attached;
+ int ret = 0;
- if (attached) {
- /* Store previous charger type to control
- when charger accessory will be detached */
- info->prev_chg_type = curr_chg_type;
- chg_type = curr_chg_type;
- } else
- chg_type = info->prev_chg_type;
+ chg_type = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_CHG, &attached);
dev_info(info->dev,
"external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
attached ? "attached" : "detached",
- curr_chg_type, info->prev_chg_type);
+ chg_type, info->prev_chg_type);
switch (chg_type) {
case MAX77693_CHARGER_TYPE_USB:
- ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
- if (ret < 0)
- goto out;
- extcon_set_cable_state(info->edev, "USB", attached);
+ case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
+ case MAX77693_CHARGER_TYPE_NONE:
+ /* Check MAX77693_CABLE_GROUP_ADC_GND type */
+ cable_type_gnd = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_ADC_GND,
+ &cable_attached);
+ switch (cable_type_gnd) {
+ case MAX77693_MUIC_GND_MHL:
+ case MAX77693_MUIC_GND_MHL_VB:
+ /*
+ * MHL cable with MHL_TA(USB/TA) cable
+ * - MHL cable include two port(HDMI line and separate micro-
+ * usb port. When the target connect MHL cable, extcon driver
+ * check whether MHL_TA(USB/TA) cable is connected. If MHL_TA
+ * cable is connected, extcon driver notify state to notifiee
+ * for charging battery.
+ *
+ * Features of 'MHL_TA(USB/TA) with MHL cable'
+ * - Support MHL
+ * - Support charging through micro-usb port without data connection
+ */
+ extcon_set_cable_state(info->edev, "MHL_TA", attached);
+ if (!cable_attached)
+ extcon_set_cable_state(info->edev, "MHL", cable_attached);
+ break;
+ }
+
+ /* Check MAX77693_CABLE_GROUP_ADC type */
+ cable_type = max77693_muic_get_cable_type(info,
+ MAX77693_CABLE_GROUP_ADC,
+ &cable_attached);
+ switch (cable_type) {
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
+ /*
+ * Dock-Audio device with USB/TA cable
+ * - Dock device include two port(Dock-Audio and micro-usb
+ * port). When the target connect Dock-Audio device, extcon
+ * driver check whether USB/TA cable is connected. If USB/TA
+ * cable is connected, extcon driver notify state to notifiee
+ * for charging battery.
+ *
+ * Features of 'USB/TA cable with Dock-Audio device'
+ * - Support external output feature of audio.
+ * - Support charging through micro-usb port without data
+ * connection.
+ */
+ extcon_set_cable_state(info->edev, "USB", attached);
+
+ if (!cable_attached)
+ extcon_set_cable_state(info->edev, "Dock-Audio", cable_attached);
+ break;
+ case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
+ /*
+ * Dock-Smart device with USB/TA cable
+ * - Dock-Desk device include three type of cable which
+ * are HDMI, USB for mouse/keyboard and micro-usb port
+ * for USB/TA cable. Dock-Smart device need always exteranl
+ * power supply(USB/TA cable through micro-usb cable). Dock-
+ * Smart device support screen output of target to separate
+ * monitor and mouse/keyboard for desktop mode.
+ *
+ * Features of 'USB/TA cable with Dock-Smart device'
+ * - Support MHL
+ * - Support external output feature of audio
+ * - Support charging through micro-usb port without data
+ * connection if TA cable is connected to target.
+ * - Support charging and data connection through micro-usb port
+ * if USB cable is connected between target and host
+ * device.
+ * - Support OTG device (Mouse/Keyboard)
+ */
+ ret = max77693_muic_set_path(info, info->path_usb, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_cable_state(info->edev, "Dock-Smart", attached);
+ extcon_set_cable_state(info->edev, "MHL", attached);
+
+ break;
+ }
+
+ /* Check MAX77693_CABLE_GROUP_CHG type */
+ switch (chg_type) {
+ case MAX77693_CHARGER_TYPE_NONE:
+ /*
+ * When MHL(with USB/TA cable) or Dock-Audio with USB/TA cable
+ * is attached, muic device happen below two interrupt.
+ * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting MHL/Dock-Audio.
+ * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting USB/TA cable
+ * connected to MHL or Dock-Audio.
+ * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC interrupt
+ * than MAX77693_MUIC_IRQ_INT2_CHGTYP interrupt.
+ *
+ * If user attach MHL (with USB/TA cable and immediately detach
+ * MHL with USB/TA cable before MAX77693_MUIC_IRQ_INT2_CHGTYP
+ * interrupt is happened, USB/TA cable remain connected state to
+ * target. But USB/TA cable isn't connected to target. The user
+ * be face with unusual action. So, driver should check this
+ * situation in spite of, that previous charger type is N/A.
+ */
+ break;
+ case MAX77693_CHARGER_TYPE_USB:
+ /* Only USB cable, PATH:AP_USB */
+ ret = max77693_muic_set_path(info, info->path_usb, attached);
+ if (ret < 0)
+ return ret;
+
+ extcon_set_cable_state(info->edev, "USB", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
+ /* Only TA cable */
+ extcon_set_cable_state(info->edev, "TA", attached);
+ break;
+ }
break;
case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
extcon_set_cable_state(info->edev,
"Charge-downstream", attached);
break;
- case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
- extcon_set_cable_state(info->edev, "TA", attached);
- break;
case MAX77693_CHARGER_TYPE_APPLE_500MA:
extcon_set_cable_state(info->edev, "Slow-charger", attached);
break;
@@ -498,22 +903,18 @@ static int max77693_muic_chg_handler(struct max77693_muic_info *info,
dev_err(info->dev,
"failed to detect %s accessory (chg_type:0x%x)\n",
attached ? "attached" : "detached", chg_type);
- ret = -EINVAL;
- goto out;
+ return -EINVAL;
}
-out:
- return ret;
+ return 0;
}
static void max77693_muic_irq_work(struct work_struct *work)
{
struct max77693_muic_info *info = container_of(work,
struct max77693_muic_info, irq_work);
- int curr_adc, curr_chg_type;
int irq_type = -1;
int i, ret = 0;
- bool attached = true;
if (!info->edev)
return;
@@ -539,14 +940,7 @@ static void max77693_muic_irq_work(struct work_struct *work)
case MAX77693_MUIC_IRQ_INT1_ADC1K:
/* Handle all of accessory except for
type of charger accessory */
- curr_adc = info->status[0] & STATUS1_ADC_MASK;
- curr_adc >>= STATUS1_ADC_SHIFT;
-
- /* Check accessory state which is either detached or attached */
- if (curr_adc == MAX77693_MUIC_ADC_OPEN)
- attached = false;
-
- ret = max77693_muic_adc_handler(info, curr_adc, attached);
+ ret = max77693_muic_adc_handler(info);
break;
case MAX77693_MUIC_IRQ_INT2_CHGTYP:
case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
@@ -555,15 +949,7 @@ static void max77693_muic_irq_work(struct work_struct *work)
case MAX77693_MUIC_IRQ_INT2_VBVOLT:
case MAX77693_MUIC_IRQ_INT2_VIDRM:
/* Handle charger accessory */
- curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
- curr_chg_type >>= STATUS2_CHGTYP_SHIFT;
-
- /* Check charger accessory state which
- is either detached or attached */
- if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE)
- attached = false;
-
- ret = max77693_muic_chg_handler(info, curr_chg_type, attached);
+ ret = max77693_muic_chg_handler(info);
break;
case MAX77693_MUIC_IRQ_INT3_EOC:
case MAX77693_MUIC_IRQ_INT3_CGMBC:
@@ -575,7 +961,8 @@ static void max77693_muic_irq_work(struct work_struct *work)
default:
dev_err(info->dev, "muic interrupt: irq %d occurred\n",
irq_type);
- break;
+ mutex_unlock(&info->mutex);
+ return;
}
if (ret < 0)
@@ -604,7 +991,9 @@ static struct regmap_config max77693_muic_regmap_config = {
static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
{
int ret = 0;
- int adc, chg_type;
+ int adc;
+ int chg_type;
+ bool attached;
mutex_lock(&info->mutex);
@@ -617,35 +1006,39 @@ static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
return -EINVAL;
}
- adc = info->status[0] & STATUS1_ADC_MASK;
- adc >>= STATUS1_ADC_SHIFT;
-
- if (adc != MAX77693_MUIC_ADC_OPEN) {
- dev_info(info->dev,
- "external connector is attached (adc:0x%02x)\n", adc);
+ adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
+ &attached);
+ if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
+ ret = max77693_muic_adc_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect accessory\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
- ret = max77693_muic_adc_handler(info, adc, true);
- if (ret < 0)
- dev_err(info->dev, "failed to detect accessory\n");
- goto out;
+ chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
+ &attached);
+ if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
+ ret = max77693_muic_chg_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect charger accessory\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
}
- chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
- chg_type >>= STATUS2_CHGTYP_SHIFT;
+ mutex_unlock(&info->mutex);
- if (chg_type != MAX77693_CHARGER_TYPE_NONE) {
- dev_info(info->dev,
- "external connector is attached (chg_type:0x%x)\n",
- chg_type);
+ return 0;
+}
- max77693_muic_chg_handler(info, chg_type, true);
- if (ret < 0)
- dev_err(info->dev, "failed to detect charger accessory\n");
- }
+static void max77693_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct max77693_muic_info *info = container_of(to_delayed_work(work),
+ struct max77693_muic_info, wq_detcable);
-out:
- mutex_unlock(&info->mutex);
- return ret;
+ max77693_muic_detect_accessory(info);
}
static int max77693_muic_probe(struct platform_device *pdev)
@@ -654,7 +1047,9 @@ static int max77693_muic_probe(struct platform_device *pdev)
struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
struct max77693_muic_platform_data *muic_pdata = pdata->muic_data;
struct max77693_muic_info *info;
- int ret, i;
+ int delay_jiffies;
+ int ret;
+ int i;
u8 id;
info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
@@ -678,6 +1073,32 @@ static int max77693_muic_probe(struct platform_device *pdev)
return ret;
}
}
+
+ /* Register input device for button of dock device */
+ info->dock = devm_input_allocate_device(&pdev->dev);
+ if (!info->dock) {
+ dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
+ return -ENOMEM;
+ }
+ info->dock->name = "max77693-muic/dock";
+ info->dock->phys = "max77693-muic/extcon";
+ info->dock->dev.parent = &pdev->dev;
+
+ __set_bit(EV_REP, info->dock->evbit);
+
+ input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
+ input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
+ input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
+ input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
+ input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
+
+ ret = input_register_device(info->dock);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
+ ret);
+ return ret;
+ }
+
platform_set_drvdata(pdev, info);
mutex_init(&info->mutex);
@@ -697,13 +1118,13 @@ static int max77693_muic_probe(struct platform_device *pdev)
ret = request_threaded_irq(virq, NULL,
max77693_muic_irq_handler,
- IRQF_ONESHOT, muic_irq->name, info);
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
if (ret) {
dev_err(&pdev->dev,
"failed: irq request (IRQ: %d,"
" error :%d)\n",
muic_irq->irq, ret);
-
goto err_irq;
}
}
@@ -749,23 +1170,54 @@ static int max77693_muic_probe(struct platform_device *pdev)
= muic_pdata->init_data[i].data;
}
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ if (muic_pdata->path_uart)
+ info->path_uart = muic_pdata->path_uart;
+ else
+ info->path_uart = CONTROL1_SW_UART;
+
+ if (muic_pdata->path_usb)
+ info->path_usb = muic_pdata->path_usb;
+ else
+ info->path_usb = CONTROL1_SW_USB;
+
+ /* Set initial path for UART */
+ max77693_muic_set_path(info, info->path_uart, true);
+
/* Check revision number of MUIC device*/
ret = max77693_read_reg(info->max77693->regmap_muic,
MAX77693_MUIC_REG_ID, &id);
if (ret < 0) {
dev_err(&pdev->dev, "failed to read revision number\n");
- goto err_irq;
+ goto err_extcon;
}
dev_info(info->dev, "device ID : 0x%x\n", id);
/* Set ADC debounce time */
max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
- /* Detect accessory on boot */
- max77693_muic_detect_accessory(info);
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
+ if (muic_pdata->detcable_delay_ms)
+ delay_jiffies = msecs_to_jiffies(muic_pdata->detcable_delay_ms);
+ else
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+ schedule_delayed_work(&info->wq_detcable, delay_jiffies);
return ret;
+err_extcon:
+ extcon_dev_unregister(info->edev);
err_irq:
while (--i >= 0)
free_irq(muic_irqs[i].virq, info);
@@ -780,6 +1232,7 @@ static int max77693_muic_remove(struct platform_device *pdev)
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
free_irq(muic_irqs[i].virq, info);
cancel_work_sync(&info->irq_work);
+ input_unregister_device(info->dock);
extcon_dev_unregister(info->edev);
return 0;
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 93009fe6ef0..e636d950ad6 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -29,51 +29,14 @@
#include <linux/irqdomain.h>
#define DEV_NAME "max8997-muic"
+#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
-/* MAX8997-MUIC STATUS1 register */
-#define STATUS1_ADC_SHIFT 0
-#define STATUS1_ADCLOW_SHIFT 5
-#define STATUS1_ADCERR_SHIFT 6
-#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
-#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
-#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
-
-/* MAX8997-MUIC STATUS2 register */
-#define STATUS2_CHGTYP_SHIFT 0
-#define STATUS2_CHGDETRUN_SHIFT 3
-#define STATUS2_DCDTMR_SHIFT 4
-#define STATUS2_DBCHG_SHIFT 5
-#define STATUS2_VBVOLT_SHIFT 6
-#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
-#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
-#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
-#define STATUS2_DBCHG_MASK (0x1 << STATUS2_DBCHG_SHIFT)
-#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
-
-/* MAX8997-MUIC STATUS3 register */
-#define STATUS3_OVP_SHIFT 2
-#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
-
-/* MAX8997-MUIC CONTROL1 register */
-#define COMN1SW_SHIFT 0
-#define COMP2SW_SHIFT 3
-#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
-#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
-#define SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
-
-#define MAX8997_SW_USB ((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
-#define MAX8997_SW_AUDIO ((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
-#define MAX8997_SW_UART ((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
-#define MAX8997_SW_OPEN ((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))
-
-#define MAX8997_ADC_GROUND 0x00
-#define MAX8997_ADC_MHL 0x01
-#define MAX8997_ADC_JIG_USB_1 0x18
-#define MAX8997_ADC_JIG_USB_2 0x19
-#define MAX8997_ADC_DESKDOCK 0x1a
-#define MAX8997_ADC_JIG_UART 0x1c
-#define MAX8997_ADC_CARDOCK 0x1d
-#define MAX8997_ADC_OPEN 0x1f
+enum max8997_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */
+ ADC_DEBOUNCE_TIME_10MS, /* 10ms */
+ ADC_DEBOUNCE_TIME_25MS, /* 25ms */
+ ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */
+};
struct max8997_muic_irq {
unsigned int irq;
@@ -82,61 +45,303 @@ struct max8997_muic_irq {
};
static struct max8997_muic_irq muic_irqs[] = {
- { MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
- { MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
- { MAX8997_MUICIRQ_ADC, "muic-ADC" },
- { MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
- { MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
- { MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
- { MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
- { MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
- { MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
+ { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" },
+ { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" },
+ { MAX8997_MUICIRQ_ADC, "muic-ADC" },
+ { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" },
+ { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" },
+ { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" },
+ { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" },
+ { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" },
+ { MAX8997_MUICIRQ_OVP, "muic-OVP" },
+};
+
+/* Define supported cable type */
+enum max8997_muic_acc_type {
+ MAX8997_MUIC_ADC_GROUND = 0x0,
+ MAX8997_MUIC_ADC_MHL, /* MHL*/
+ MAX8997_MUIC_ADC_REMOTE_S1_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S2_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S3_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S4_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S5_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S6_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S7_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S8_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S9_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S10_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S11_BUTTON,
+ MAX8997_MUIC_ADC_REMOTE_S12_BUTTON,
+ MAX8997_MUIC_ADC_RESERVED_ACC_1,
+ MAX8997_MUIC_ADC_RESERVED_ACC_2,
+ MAX8997_MUIC_ADC_RESERVED_ACC_3,
+ MAX8997_MUIC_ADC_RESERVED_ACC_4,
+ MAX8997_MUIC_ADC_RESERVED_ACC_5,
+ MAX8997_MUIC_ADC_CEA936_AUDIO,
+ MAX8997_MUIC_ADC_PHONE_POWERED_DEV,
+ MAX8997_MUIC_ADC_TTY_CONVERTER,
+ MAX8997_MUIC_ADC_UART_CABLE,
+ MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG,
+ MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */
+ MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */
+ MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */
+ MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG,
+ MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */
+ MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */
+ MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE,
+ MAX8997_MUIC_ADC_OPEN, /* OPEN */
+};
+
+enum max8997_muic_cable_group {
+ MAX8997_CABLE_GROUP_ADC = 0,
+ MAX8997_CABLE_GROUP_ADC_GND,
+ MAX8997_CABLE_GROUP_CHG,
+ MAX8997_CABLE_GROUP_VBVOLT,
+};
+
+enum max8997_muic_usb_type {
+ MAX8997_USB_HOST,
+ MAX8997_USB_DEVICE,
+};
+
+enum max8997_muic_charger_type {
+ MAX8997_CHARGER_TYPE_NONE = 0,
+ MAX8997_CHARGER_TYPE_USB,
+ MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT,
+ MAX8997_CHARGER_TYPE_DEDICATED_CHG,
+ MAX8997_CHARGER_TYPE_500MA,
+ MAX8997_CHARGER_TYPE_1A,
+ MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7,
};
struct max8997_muic_info {
struct device *dev;
struct i2c_client *muic;
- struct max8997_muic_platform_data *muic_pdata;
+ struct extcon_dev *edev;
+ int prev_cable_type;
+ int prev_chg_type;
+ u8 status[2];
int irq;
struct work_struct irq_work;
+ struct mutex mutex;
+ struct max8997_muic_platform_data *muic_pdata;
enum max8997_muic_charger_type pre_charger_type;
- int pre_adc;
- struct mutex mutex;
+ /*
+ * Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ struct delayed_work wq_detcable;
+
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ int path_usb;
+ int path_uart;
+};
- struct extcon_dev *edev;
+enum {
+ EXTCON_CABLE_USB = 0,
+ EXTCON_CABLE_USB_HOST,
+ EXTCON_CABLE_TA,
+ EXTCON_CABLE_FAST_CHARGER,
+ EXTCON_CABLE_SLOW_CHARGER,
+ EXTCON_CABLE_CHARGE_DOWNSTREAM,
+ EXTCON_CABLE_MHL,
+ EXTCON_CABLE_DOCK_DESK,
+ EXTCON_CABLE_DOCK_CARD,
+ EXTCON_CABLE_JIG,
+
+ _EXTCON_CABLE_NUM,
};
-const char *max8997_extcon_cable[] = {
- [0] = "USB",
- [1] = "USB-Host",
- [2] = "TA",
- [3] = "Fast-charger",
- [4] = "Slow-charger",
- [5] = "Charge-downstream",
- [6] = "MHL",
- [7] = "Dock-desk",
- [8] = "Dock-card",
- [9] = "JIG",
+static const char *max8997_extcon_cable[] = {
+ [EXTCON_CABLE_USB] = "USB",
+ [EXTCON_CABLE_USB_HOST] = "USB-Host",
+ [EXTCON_CABLE_TA] = "TA",
+ [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
+ [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
+ [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
+ [EXTCON_CABLE_MHL] = "MHL",
+ [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
+ [EXTCON_CABLE_DOCK_CARD] = "Dock-Card",
+ [EXTCON_CABLE_JIG] = "JIG",
NULL,
};
+/*
+ * max8997_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max8997 MUIC
+ * @time: the debounce time of ADC
+ */
+static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
+ enum max8997_muic_adc_debounce_time time)
+{
+ int ret;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_0_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL3,
+ time << CONTROL3_ADCDBSET_SHIFT,
+ CONTROL3_ADCDBSET_MASK);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ return -EAGAIN;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ return -EINVAL;
+ }
+
+ return 0;
+};
+
+/*
+ * max8997_muic_set_path - Set hardware line according to attached cable
+ * @info: the instance including private data of max8997 MUIC
+ * @value: the path according to attached cable
+ * @attached: the state of cable (true:attached, false:detached)
+ *
+ * The max8997 MUIC device share outside H/W line among a varity of cables,
+ * so this function set internal path of H/W line according to the type of
+ * attached cable.
+ */
+static int max8997_muic_set_path(struct max8997_muic_info *info,
+ u8 val, bool attached)
+{
+ int ret = 0;
+ u8 ctrl1, ctrl2 = 0;
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = CONTROL1_SW_OPEN;
+
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return -EAGAIN;
+ }
+
+ if (attached)
+ ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL2, ctrl2,
+ CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return -EAGAIN;
+ }
+
+ dev_info(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+
+ return 0;
+}
+
+/*
+ * max8997_muic_get_cable_type - Return cable type and check cable state
+ * @info: the instance including private data of max8997 MUIC
+ * @group: the path according to attached cable
+ * @attached: store cable state and return
+ *
+ * This function check the cable state either attached or detached,
+ * and then divide precise type of cable according to cable group.
+ * - MAX8997_CABLE_GROUP_ADC
+ * - MAX8997_CABLE_GROUP_CHG
+ */
+static int max8997_muic_get_cable_type(struct max8997_muic_info *info,
+ enum max8997_muic_cable_group group, bool *attached)
+{
+ int cable_type = 0;
+ int adc;
+ int chg_type;
+
+ switch (group) {
+ case MAX8997_CABLE_GROUP_ADC:
+ /*
+ * Read ADC value to check cable type and decide cable state
+ * according to cable type
+ */
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ /*
+ * Check current cable state/cable type and store cable type
+ * (info->prev_cable_type) for handling cable when cable is
+ * detached.
+ */
+ if (adc == MAX8997_MUIC_ADC_OPEN) {
+ *attached = false;
+
+ cable_type = info->prev_cable_type;
+ info->prev_cable_type = MAX8997_MUIC_ADC_OPEN;
+ } else {
+ *attached = true;
+
+ cable_type = info->prev_cable_type = adc;
+ }
+ break;
+ case MAX8997_CABLE_GROUP_CHG:
+ /*
+ * Read charger type to check cable type and decide cable state
+ * according to type of charger cable.
+ */
+ chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ if (chg_type == MAX8997_CHARGER_TYPE_NONE) {
+ *attached = false;
+
+ cable_type = info->prev_chg_type;
+ info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE;
+ } else {
+ *attached = true;
+
+ /*
+ * Check current cable state/cable type and store cable
+ * type(info->prev_chg_type) for handling cable when
+ * charger cable is detached.
+ */
+ cable_type = info->prev_chg_type = chg_type;
+ }
+
+ break;
+ default:
+ dev_err(info->dev, "Unknown cable group (%d)\n", group);
+ cable_type = -EINVAL;
+ break;
+ }
+
+ return cable_type;
+}
+
static int max8997_muic_handle_usb(struct max8997_muic_info *info,
enum max8997_muic_usb_type usb_type, bool attached)
{
int ret = 0;
if (usb_type == MAX8997_USB_HOST) {
- /* switch to USB */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
- SW_MASK);
- if (ret) {
+ ret = max8997_muic_set_path(info, info->path_usb, attached);
+ if (ret < 0) {
dev_err(info->dev, "failed to update muic register\n");
- goto out;
+ return ret;
}
}
@@ -148,41 +353,39 @@ static int max8997_muic_handle_usb(struct max8997_muic_info *info,
extcon_set_cable_state(info->edev, "USB", attached);
break;
default:
- ret = -EINVAL;
- break;
+ dev_err(info->dev, "failed to detect %s usb cable\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
}
-out:
- return ret;
+ return 0;
}
static int max8997_muic_handle_dock(struct max8997_muic_info *info,
- int adc, bool attached)
+ int cable_type, bool attached)
{
int ret = 0;
- /* switch to AUDIO */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
- SW_MASK);
+ ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
if (ret) {
dev_err(info->dev, "failed to update muic register\n");
- goto out;
+ return ret;
}
- switch (adc) {
- case MAX8997_ADC_DESKDOCK:
+ switch (cable_type) {
+ case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
extcon_set_cable_state(info->edev, "Dock-desk", attached);
break;
- case MAX8997_ADC_CARDOCK:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
extcon_set_cable_state(info->edev, "Dock-card", attached);
break;
default:
- ret = -EINVAL;
- break;
+ dev_err(info->dev, "failed to detect %s dock device\n",
+ attached ? "attached" : "detached");
+ return -EINVAL;
}
-out:
- return ret;
+
+ return 0;
}
static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
@@ -191,199 +394,188 @@ static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
int ret = 0;
/* switch to UART */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
- SW_MASK);
+ ret = max8997_muic_set_path(info, info->path_uart, attached);
if (ret) {
dev_err(info->dev, "failed to update muic register\n");
- goto out;
+ return -EINVAL;
}
extcon_set_cable_state(info->edev, "JIG", attached);
-out:
- return ret;
-}
-
-static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
-{
- int ret = 0;
- switch (info->pre_adc) {
- case MAX8997_ADC_GROUND:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
- break;
- case MAX8997_ADC_MHL:
- extcon_set_cable_state(info->edev, "MHL", false);
- break;
- case MAX8997_ADC_JIG_USB_1:
- case MAX8997_ADC_JIG_USB_2:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
- break;
- case MAX8997_ADC_DESKDOCK:
- case MAX8997_ADC_CARDOCK:
- ret = max8997_muic_handle_dock(info, info->pre_adc, false);
- break;
- case MAX8997_ADC_JIG_UART:
- ret = max8997_muic_handle_jig_uart(info, false);
- break;
- default:
- break;
- }
-
- return ret;
+ return 0;
}
-static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
+static int max8997_muic_adc_handler(struct max8997_muic_info *info)
{
+ int cable_type;
+ bool attached;
int ret = 0;
- switch (adc) {
- case MAX8997_ADC_GROUND:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
- break;
- case MAX8997_ADC_MHL:
- extcon_set_cable_state(info->edev, "MHL", true);
- break;
- case MAX8997_ADC_JIG_USB_1:
- case MAX8997_ADC_JIG_USB_2:
- ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
- break;
- case MAX8997_ADC_DESKDOCK:
- case MAX8997_ADC_CARDOCK:
- ret = max8997_muic_handle_dock(info, adc, true);
- break;
- case MAX8997_ADC_JIG_UART:
- ret = max8997_muic_handle_jig_uart(info, true);
- break;
- case MAX8997_ADC_OPEN:
- ret = max8997_muic_handle_adc_detach(info);
- break;
- default:
- ret = -EINVAL;
- goto out;
- }
-
- info->pre_adc = adc;
-out:
- return ret;
-}
-
-static int max8997_muic_handle_charger_type_detach(
- struct max8997_muic_info *info)
-{
- switch (info->pre_charger_type) {
- case MAX8997_CHARGER_TYPE_USB:
- extcon_set_cable_state(info->edev, "USB", false);
- break;
- case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
- extcon_set_cable_state(info->edev, "Charge-downstream", false);
- break;
- case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
- extcon_set_cable_state(info->edev, "TA", false);
- break;
- case MAX8997_CHARGER_TYPE_500MA:
- extcon_set_cable_state(info->edev, "Slow-charger", false);
- break;
- case MAX8997_CHARGER_TYPE_1A:
- extcon_set_cable_state(info->edev, "Fast-charger", false);
- break;
+ /* Check cable state which is either detached or attached */
+ cable_type = max8997_muic_get_cable_type(info,
+ MAX8997_CABLE_GROUP_ADC, &attached);
+
+ switch (cable_type) {
+ case MAX8997_MUIC_ADC_GROUND:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_MHL:
+ extcon_set_cable_state(info->edev, "MHL", attached);
+ break;
+ case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON:
+ ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
+ ret = max8997_muic_handle_dock(info, cable_type, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ ret = max8997_muic_handle_jig_uart(info, attached);
+ break;
+ case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON:
+ case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_1:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_2:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_3:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_4:
+ case MAX8997_MUIC_ADC_RESERVED_ACC_5:
+ case MAX8997_MUIC_ADC_CEA936_AUDIO:
+ case MAX8997_MUIC_ADC_PHONE_POWERED_DEV:
+ case MAX8997_MUIC_ADC_TTY_CONVERTER:
+ case MAX8997_MUIC_ADC_UART_CABLE:
+ case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG:
+ case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG:
+ case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE:
+ /*
+ * This cable isn't used in general case if it is specially
+ * needed to detect additional cable, should implement
+ * proper operation when this cable is attached/detached.
+ */
+ dev_info(info->dev,
+ "cable is %s but it isn't used (type:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
+ return -EAGAIN;
default:
+ dev_err(info->dev,
+ "failed to detect %s unknown cable (type:0x%x)\n",
+ attached ? "attached" : "detached", cable_type);
return -EINVAL;
- break;
}
return 0;
}
-static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
- enum max8997_muic_charger_type charger_type)
+static int max8997_muic_chg_handler(struct max8997_muic_info *info)
{
- u8 adc;
- int ret;
+ int chg_type;
+ bool attached;
+ int adc;
- ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
- if (ret) {
- dev_err(info->dev, "failed to read muic register\n");
- goto out;
- }
+ chg_type = max8997_muic_get_cable_type(info,
+ MAX8997_CABLE_GROUP_CHG, &attached);
- switch (charger_type) {
+ switch (chg_type) {
case MAX8997_CHARGER_TYPE_NONE:
- ret = max8997_muic_handle_charger_type_detach(info);
break;
case MAX8997_CHARGER_TYPE_USB:
- if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) {
max8997_muic_handle_usb(info,
- MAX8997_USB_DEVICE, true);
+ MAX8997_USB_DEVICE, attached);
}
break;
case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
- extcon_set_cable_state(info->edev, "Charge-downstream", true);
+ extcon_set_cable_state(info->edev, "Charge-downstream", attached);
break;
case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
- extcon_set_cable_state(info->edev, "TA", true);
+ extcon_set_cable_state(info->edev, "TA", attached);
break;
case MAX8997_CHARGER_TYPE_500MA:
- extcon_set_cable_state(info->edev, "Slow-charger", true);
+ extcon_set_cable_state(info->edev, "Slow-charger", attached);
break;
case MAX8997_CHARGER_TYPE_1A:
- extcon_set_cable_state(info->edev, "Fast-charger", true);
+ extcon_set_cable_state(info->edev, "Fast-charger", attached);
break;
default:
- ret = -EINVAL;
- goto out;
+ dev_err(info->dev,
+ "failed to detect %s unknown chg cable (type:0x%x)\n",
+ attached ? "attached" : "detached", chg_type);
+ return -EINVAL;
}
- info->pre_charger_type = charger_type;
-out:
- return ret;
+ return 0;
}
static void max8997_muic_irq_work(struct work_struct *work)
{
struct max8997_muic_info *info = container_of(work,
struct max8997_muic_info, irq_work);
- u8 status[2];
- u8 adc, chg_type;
int irq_type = 0;
int i, ret;
+ if (!info->edev)
+ return;
+
mutex_lock(&info->mutex);
+ for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
+ if (info->irq == muic_irqs[i].virq)
+ irq_type = muic_irqs[i].irq;
+
ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
- 2, status);
+ 2, info->status);
if (ret) {
dev_err(info->dev, "failed to read muic register\n");
mutex_unlock(&info->mutex);
return;
}
- dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
- status[0], status[1]);
-
- for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
- if (info->irq == muic_irqs[i].virq)
- irq_type = muic_irqs[i].irq;
-
switch (irq_type) {
+ case MAX8997_MUICIRQ_ADCError:
+ case MAX8997_MUICIRQ_ADCLow:
case MAX8997_MUICIRQ_ADC:
- adc = status[0] & STATUS1_ADC_MASK;
- adc >>= STATUS1_ADC_SHIFT;
-
- max8997_muic_handle_adc(info, adc);
+ /* Handle all of cable except for charger cable */
+ ret = max8997_muic_adc_handler(info);
break;
+ case MAX8997_MUICIRQ_VBVolt:
+ case MAX8997_MUICIRQ_DBChg:
+ case MAX8997_MUICIRQ_DCDTmr:
+ case MAX8997_MUICIRQ_ChgDetRun:
case MAX8997_MUICIRQ_ChgTyp:
- chg_type = status[1] & STATUS2_CHGTYP_MASK;
- chg_type >>= STATUS2_CHGTYP_SHIFT;
-
- max8997_muic_handle_charger_type(info, chg_type);
+ /* Handle charger cable */
+ ret = max8997_muic_chg_handler(info);
+ break;
+ case MAX8997_MUICIRQ_OVP:
break;
default:
dev_info(info->dev, "misc interrupt: irq %d occurred\n",
irq_type);
- break;
+ mutex_unlock(&info->mutex);
+ return;
}
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
mutex_unlock(&info->mutex);
return;
@@ -401,29 +593,60 @@ static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
return IRQ_HANDLED;
}
-static void max8997_muic_detect_dev(struct max8997_muic_info *info)
+static int max8997_muic_detect_dev(struct max8997_muic_info *info)
{
- int ret;
- u8 status[2], adc, chg_type;
+ int ret = 0;
+ int adc;
+ int chg_type;
+ bool attached;
- ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
- 2, status);
+ mutex_lock(&info->mutex);
+
+ /* Read STATUSx register to detect accessory */
+ ret = max8997_bulk_read(info->muic,
+ MAX8997_MUIC_REG_STATUS1, 2, info->status);
if (ret) {
- dev_err(info->dev, "failed to read muic register\n");
- return;
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return -EINVAL;
}
- dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
- status[0], status[1]);
+ adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC,
+ &attached);
+ if (attached && adc != MAX8997_MUIC_ADC_OPEN) {
+ ret = max8997_muic_adc_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect ADC cable\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
- adc = status[0] & STATUS1_ADC_MASK;
- adc >>= STATUS1_ADC_SHIFT;
+ chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG,
+ &attached);
+ if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) {
+ ret = max8997_muic_chg_handler(info);
+ if (ret < 0) {
+ dev_err(info->dev, "Cannot detect charger cable\n");
+ mutex_unlock(&info->mutex);
+ return ret;
+ }
+ }
+
+ mutex_unlock(&info->mutex);
+
+ return 0;
+}
- chg_type = status[1] & STATUS2_CHGTYP_MASK;
- chg_type >>= STATUS2_CHGTYP_SHIFT;
+static void max8997_muic_detect_cable_wq(struct work_struct *work)
+{
+ struct max8997_muic_info *info = container_of(to_delayed_work(work),
+ struct max8997_muic_info, wq_detcable);
+ int ret;
- max8997_muic_handle_adc(info, adc);
- max8997_muic_handle_charger_type(info, chg_type);
+ ret = max8997_muic_detect_dev(info);
+ if (ret < 0)
+ pr_err("failed to detect cable type\n");
}
static int max8997_muic_probe(struct platform_device *pdev)
@@ -431,6 +654,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
struct max8997_muic_info *info;
+ int delay_jiffies;
int ret, i;
info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
@@ -459,8 +683,10 @@ static int max8997_muic_probe(struct platform_device *pdev)
}
muic_irq->virq = virq;
- ret = request_threaded_irq(virq, NULL, max8997_muic_irq_handler,
- 0, muic_irq->name, info);
+ ret = request_threaded_irq(virq, NULL,
+ max8997_muic_irq_handler,
+ IRQF_NO_SUSPEND,
+ muic_irq->name, info);
if (ret) {
dev_err(&pdev->dev,
"failed: irq request (IRQ: %d,"
@@ -496,10 +722,42 @@ static int max8997_muic_probe(struct platform_device *pdev)
}
}
- /* Initial device detection */
- max8997_muic_detect_dev(info);
+ /*
+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+ * h/w path of COMP2/COMN1 on CONTROL1 register.
+ */
+ if (pdata->muic_pdata->path_uart)
+ info->path_uart = pdata->muic_pdata->path_uart;
+ else
+ info->path_uart = CONTROL1_SW_UART;
+
+ if (pdata->muic_pdata->path_usb)
+ info->path_usb = pdata->muic_pdata->path_usb;
+ else
+ info->path_usb = CONTROL1_SW_USB;
+
+ /* Set initial path for UART */
+ max8997_muic_set_path(info, info->path_uart, true);
+
+ /* Set ADC debounce time */
+ max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
+ /*
+ * Detect accessory after completing the initialization of platform
+ *
+ * - Use delayed workqueue to detect cable state and then
+ * notify cable state to notifiee/platform through uevent.
+ * After completing the booting of platform, the extcon provider
+ * driver should notify cable state to upper layer.
+ */
+ INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq);
+ if (pdata->muic_pdata->detcable_delay_ms)
+ delay_jiffies = msecs_to_jiffies(pdata->muic_pdata->detcable_delay_ms);
+ else
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
+ schedule_delayed_work(&info->wq_detcable, delay_jiffies);
- return ret;
+ return 0;
err_irq:
while (--i >= 0)
diff --git a/drivers/hid/hid-hyperv.c b/drivers/hid/hid-hyperv.c
index 3d62781b899..aa3fec0d9dc 100644
--- a/drivers/hid/hid-hyperv.c
+++ b/drivers/hid/hid-hyperv.c
@@ -568,8 +568,7 @@ static int mousevsc_remove(struct hv_device *dev)
static const struct hv_vmbus_device_id id_table[] = {
/* Mouse guid */
- { VMBUS_DEVICE(0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c,
- 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A) },
+ { HV_MOUSE_GUID, },
{ },
};
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 773a2f25a8f..0b122f8c700 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -55,7 +55,7 @@ static void vmbus_setevent(struct vmbus_channel *channel)
[channel->monitor_grp].pending);
} else {
- vmbus_set_event(channel->offermsg.child_relid);
+ vmbus_set_event(channel);
}
}
@@ -181,7 +181,7 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle;
open_msg->downstream_ringbuffer_pageoffset = send_ringbuffer_size >>
PAGE_SHIFT;
- open_msg->server_contextarea_gpadlhandle = 0;
+ open_msg->target_vp = newchannel->target_vp;
if (userdatalen > MAX_USER_DEFINED_BYTES) {
err = -EINVAL;
@@ -564,6 +564,7 @@ int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer,
struct scatterlist bufferlist[3];
u64 aligned_data = 0;
int ret;
+ bool signal = false;
/* Setup the descriptor */
@@ -580,9 +581,9 @@ int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer,
sg_set_buf(&bufferlist[2], &aligned_data,
packetlen_aligned - packetlen);
- ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3);
+ ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal);
- if (ret == 0 && !hv_get_ringbuffer_interrupt_mask(&channel->outbound))
+ if (ret == 0 && signal)
vmbus_setevent(channel);
return ret;
@@ -606,6 +607,7 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
u32 packetlen_aligned;
struct scatterlist bufferlist[3];
u64 aligned_data = 0;
+ bool signal = false;
if (pagecount > MAX_PAGE_BUFFER_COUNT)
return -EINVAL;
@@ -641,9 +643,9 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
sg_set_buf(&bufferlist[2], &aligned_data,
packetlen_aligned - packetlen);
- ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3);
+ ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal);
- if (ret == 0 && !hv_get_ringbuffer_interrupt_mask(&channel->outbound))
+ if (ret == 0 && signal)
vmbus_setevent(channel);
return ret;
@@ -665,6 +667,7 @@ int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
u32 packetlen_aligned;
struct scatterlist bufferlist[3];
u64 aligned_data = 0;
+ bool signal = false;
u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->offset,
multi_pagebuffer->len);
@@ -703,9 +706,9 @@ int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel,
sg_set_buf(&bufferlist[2], &aligned_data,
packetlen_aligned - packetlen);
- ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3);
+ ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal);
- if (ret == 0 && !hv_get_ringbuffer_interrupt_mask(&channel->outbound))
+ if (ret == 0 && signal)
vmbus_setevent(channel);
return ret;
@@ -732,6 +735,7 @@ int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer,
u32 packetlen;
u32 userlen;
int ret;
+ bool signal = false;
*buffer_actual_len = 0;
*requestid = 0;
@@ -758,8 +762,10 @@ int vmbus_recvpacket(struct vmbus_channel *channel, void *buffer,
/* Copy over the packet to the user buffer */
ret = hv_ringbuffer_read(&channel->inbound, buffer, userlen,
- (desc.offset8 << 3));
+ (desc.offset8 << 3), &signal);
+ if (signal)
+ vmbus_setevent(channel);
return 0;
}
@@ -774,8 +780,8 @@ int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer,
{
struct vmpacket_descriptor desc;
u32 packetlen;
- u32 userlen;
int ret;
+ bool signal = false;
*buffer_actual_len = 0;
*requestid = 0;
@@ -788,7 +794,6 @@ int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer,
packetlen = desc.len8 << 3;
- userlen = packetlen - (desc.offset8 << 3);
*buffer_actual_len = packetlen;
@@ -802,7 +807,11 @@ int vmbus_recvpacket_raw(struct vmbus_channel *channel, void *buffer,
*requestid = desc.trans_id;
/* Copy over the entire packet to the user buffer */
- ret = hv_ringbuffer_read(&channel->inbound, buffer, packetlen, 0);
+ ret = hv_ringbuffer_read(&channel->inbound, buffer, packetlen, 0,
+ &signal);
+
+ if (signal)
+ vmbus_setevent(channel);
return 0;
}
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 2f84c5cff8d..53a8600162a 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -257,6 +257,70 @@ static void vmbus_process_offer(struct work_struct *work)
}
}
+enum {
+ IDE = 0,
+ SCSI,
+ NIC,
+ MAX_PERF_CHN,
+};
+
+/*
+ * This is an array of device_ids (device types) that are performance critical.
+ * We attempt to distribute the interrupt load for these devices across
+ * all available CPUs.
+ */
+static const struct hv_vmbus_device_id hp_devs[] = {
+ /* IDE */
+ { HV_IDE_GUID, },
+ /* Storage - SCSI */
+ { HV_SCSI_GUID, },
+ /* Network */
+ { HV_NIC_GUID, },
+};
+
+
+/*
+ * We use this state to statically distribute the channel interrupt load.
+ */
+static u32 next_vp;
+
+/*
+ * Starting with Win8, we can statically distribute the incoming
+ * channel interrupt load by binding a channel to VCPU. We
+ * implement here a simple round robin scheme for distributing
+ * the interrupt load.
+ * We will bind channels that are not performance critical to cpu 0 and
+ * performance critical channels (IDE, SCSI and Network) will be uniformly
+ * distributed across all available CPUs.
+ */
+static u32 get_vp_index(uuid_le *type_guid)
+{
+ u32 cur_cpu;
+ int i;
+ bool perf_chn = false;
+ u32 max_cpus = num_online_cpus();
+
+ for (i = IDE; i < MAX_PERF_CHN; i++) {
+ if (!memcmp(type_guid->b, hp_devs[i].guid,
+ sizeof(uuid_le))) {
+ perf_chn = true;
+ break;
+ }
+ }
+ if ((vmbus_proto_version == VERSION_WS2008) ||
+ (vmbus_proto_version == VERSION_WIN7) || (!perf_chn)) {
+ /*
+ * Prior to win8, all channel interrupts are
+ * delivered on cpu 0.
+ * Also if the channel is not a performance critical
+ * channel, bind it to cpu 0.
+ */
+ return 0;
+ }
+ cur_cpu = (++next_vp % max_cpus);
+ return 0;
+}
+
/*
* vmbus_onoffer - Handler for channel offers from vmbus in parent partition.
*
@@ -275,6 +339,35 @@ static void vmbus_onoffer(struct vmbus_channel_message_header *hdr)
return;
}
+ /*
+ * By default we setup state to enable batched
+ * reading. A specific service can choose to
+ * disable this prior to opening the channel.
+ */
+ newchannel->batched_reading = true;
+
+ /*
+ * Setup state for signalling the host.
+ */
+ newchannel->sig_event = (struct hv_input_signal_event *)
+ (ALIGN((unsigned long)
+ &newchannel->sig_buf,
+ HV_HYPERCALL_PARAM_ALIGN));
+
+ newchannel->sig_event->connectionid.asu32 = 0;
+ newchannel->sig_event->connectionid.u.id = VMBUS_EVENT_CONNECTION_ID;
+ newchannel->sig_event->flag_number = 0;
+ newchannel->sig_event->rsvdz = 0;
+
+ if (vmbus_proto_version != VERSION_WS2008) {
+ newchannel->is_dedicated_interrupt =
+ (offer->is_dedicated_interrupt != 0);
+ newchannel->sig_event->connectionid.u.id =
+ offer->connection_id;
+ }
+
+ newchannel->target_vp = get_vp_index(&offer->offer.if_type);
+
memcpy(&newchannel->offermsg, offer,
sizeof(struct vmbus_channel_offer_channel));
newchannel->monitor_grp = (u8)offer->monitorid / 32;
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 650c9f0b664..253a74ba245 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -30,6 +30,7 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/hyperv.h>
+#include <linux/export.h>
#include <asm/hyperv.h>
#include "hyperv_vmbus.h"
@@ -40,15 +41,99 @@ struct vmbus_connection vmbus_connection = {
};
/*
+ * Negotiated protocol version with the host.
+ */
+__u32 vmbus_proto_version;
+EXPORT_SYMBOL_GPL(vmbus_proto_version);
+
+static __u32 vmbus_get_next_version(__u32 current_version)
+{
+ switch (current_version) {
+ case (VERSION_WIN7):
+ return VERSION_WS2008;
+
+ case (VERSION_WIN8):
+ return VERSION_WIN7;
+
+ case (VERSION_WS2008):
+ default:
+ return VERSION_INVAL;
+ }
+}
+
+static int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo,
+ __u32 version)
+{
+ int ret = 0;
+ struct vmbus_channel_initiate_contact *msg;
+ unsigned long flags;
+ int t;
+
+ init_completion(&msginfo->waitevent);
+
+ msg = (struct vmbus_channel_initiate_contact *)msginfo->msg;
+
+ msg->header.msgtype = CHANNELMSG_INITIATE_CONTACT;
+ msg->vmbus_version_requested = version;
+ msg->interrupt_page = virt_to_phys(vmbus_connection.int_page);
+ msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages);
+ msg->monitor_page2 = virt_to_phys(
+ (void *)((unsigned long)vmbus_connection.monitor_pages +
+ PAGE_SIZE));
+
+ /*
+ * Add to list before we send the request since we may
+ * receive the response before returning from this routine
+ */
+ spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
+ list_add_tail(&msginfo->msglistentry,
+ &vmbus_connection.chn_msg_list);
+
+ spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
+
+ ret = vmbus_post_msg(msg,
+ sizeof(struct vmbus_channel_initiate_contact));
+ if (ret != 0) {
+ spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
+ list_del(&msginfo->msglistentry);
+ spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock,
+ flags);
+ return ret;
+ }
+
+ /* Wait for the connection response */
+ t = wait_for_completion_timeout(&msginfo->waitevent, 5*HZ);
+ if (t == 0) {
+ spin_lock_irqsave(&vmbus_connection.channelmsg_lock,
+ flags);
+ list_del(&msginfo->msglistentry);
+ spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock,
+ flags);
+ return -ETIMEDOUT;
+ }
+
+ spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
+ list_del(&msginfo->msglistentry);
+ spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
+
+ /* Check if successful */
+ if (msginfo->response.version_response.version_supported) {
+ vmbus_connection.conn_state = CONNECTED;
+ } else {
+ return -ECONNREFUSED;
+ }
+
+ return ret;
+}
+
+/*
* vmbus_connect - Sends a connect request on the partition service connection
*/
int vmbus_connect(void)
{
int ret = 0;
- int t;
struct vmbus_channel_msginfo *msginfo = NULL;
- struct vmbus_channel_initiate_contact *msg;
- unsigned long flags;
+ __u32 version;
/* Initialize the vmbus connection */
vmbus_connection.conn_state = CONNECTING;
@@ -99,69 +184,38 @@ int vmbus_connect(void)
goto cleanup;
}
- init_completion(&msginfo->waitevent);
-
- msg = (struct vmbus_channel_initiate_contact *)msginfo->msg;
-
- msg->header.msgtype = CHANNELMSG_INITIATE_CONTACT;
- msg->vmbus_version_requested = VMBUS_REVISION_NUMBER;
- msg->interrupt_page = virt_to_phys(vmbus_connection.int_page);
- msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages);
- msg->monitor_page2 = virt_to_phys(
- (void *)((unsigned long)vmbus_connection.monitor_pages +
- PAGE_SIZE));
-
/*
- * Add to list before we send the request since we may
- * receive the response before returning from this routine
+ * Negotiate a compatible VMBUS version number with the
+ * host. We start with the highest number we can support
+ * and work our way down until we negotiate a compatible
+ * version.
*/
- spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
- list_add_tail(&msginfo->msglistentry,
- &vmbus_connection.chn_msg_list);
- spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
+ version = VERSION_CURRENT;
- ret = vmbus_post_msg(msg,
- sizeof(struct vmbus_channel_initiate_contact));
- if (ret != 0) {
- spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
- list_del(&msginfo->msglistentry);
- spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock,
- flags);
- goto cleanup;
- }
+ do {
+ ret = vmbus_negotiate_version(msginfo, version);
+ if (ret == 0)
+ break;
- /* Wait for the connection response */
- t = wait_for_completion_timeout(&msginfo->waitevent, 5*HZ);
- if (t == 0) {
- spin_lock_irqsave(&vmbus_connection.channelmsg_lock,
- flags);
- list_del(&msginfo->msglistentry);
- spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock,
- flags);
- ret = -ETIMEDOUT;
- goto cleanup;
- }
+ version = vmbus_get_next_version(version);
+ } while (version != VERSION_INVAL);
- spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
- list_del(&msginfo->msglistentry);
- spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
-
- /* Check if successful */
- if (msginfo->response.version_response.version_supported) {
- vmbus_connection.conn_state = CONNECTED;
- } else {
- pr_err("Unable to connect, "
- "Version %d not supported by Hyper-V\n",
- VMBUS_REVISION_NUMBER);
- ret = -ECONNREFUSED;
+ if (version == VERSION_INVAL)
goto cleanup;
- }
+
+ vmbus_proto_version = version;
+ pr_info("Hyper-V Host Build:%d-%d.%d-%d-%d.%d; Vmbus version:%d.%d\n",
+ host_info_eax, host_info_ebx >> 16,
+ host_info_ebx & 0xFFFF, host_info_ecx,
+ host_info_edx >> 24, host_info_edx & 0xFFFFFF,
+ version >> 16, version & 0xFFFF);
kfree(msginfo);
return 0;
cleanup:
+ pr_err("Unable to connect to host\n");
vmbus_connection.conn_state = DISCONNECTED;
if (vmbus_connection.work_queue)
@@ -212,6 +266,9 @@ static void process_chn_event(u32 relid)
{
struct vmbus_channel *channel;
unsigned long flags;
+ void *arg;
+ bool read_state;
+ u32 bytes_to_read;
/*
* Find the channel based on this relid and invokes the
@@ -234,10 +291,29 @@ static void process_chn_event(u32 relid)
*/
spin_lock_irqsave(&channel->inbound_lock, flags);
- if (channel->onchannel_callback != NULL)
- channel->onchannel_callback(channel->channel_callback_context);
- else
+ if (channel->onchannel_callback != NULL) {
+ arg = channel->channel_callback_context;
+ read_state = channel->batched_reading;
+ /*
+ * This callback reads the messages sent by the host.
+ * We can optimize host to guest signaling by ensuring:
+ * 1. While reading the channel, we disable interrupts from
+ * host.
+ * 2. Ensure that we process all posted messages from the host
+ * before returning from this callback.
+ * 3. Once we return, enable signaling from the host. Once this
+ * state is set we check to see if additional packets are
+ * available to read. In this case we repeat the process.
+ */
+
+ do {
+ hv_begin_read(&channel->inbound);
+ channel->onchannel_callback(arg);
+ bytes_to_read = hv_end_read(&channel->inbound);
+ } while (read_state && (bytes_to_read != 0));
+ } else {
pr_err("no channel callback for relid - %u\n", relid);
+ }
spin_unlock_irqrestore(&channel->inbound_lock, flags);
}
@@ -248,10 +324,32 @@ static void process_chn_event(u32 relid)
void vmbus_on_event(unsigned long data)
{
u32 dword;
- u32 maxdword = MAX_NUM_CHANNELS_SUPPORTED >> 5;
+ u32 maxdword;
int bit;
u32 relid;
- u32 *recv_int_page = vmbus_connection.recv_int_page;
+ u32 *recv_int_page = NULL;
+ void *page_addr;
+ int cpu = smp_processor_id();
+ union hv_synic_event_flags *event;
+
+ if ((vmbus_proto_version == VERSION_WS2008) ||
+ (vmbus_proto_version == VERSION_WIN7)) {
+ maxdword = MAX_NUM_CHANNELS_SUPPORTED >> 5;
+ recv_int_page = vmbus_connection.recv_int_page;
+ } else {
+ /*
+ * When the host is win8 and beyond, the event page
+ * can be directly checked to get the id of the channel
+ * that has the interrupt pending.
+ */
+ maxdword = HV_EVENT_FLAGS_DWORD_COUNT;
+ page_addr = hv_context.synic_event_page[cpu];
+ event = (union hv_synic_event_flags *)page_addr +
+ VMBUS_MESSAGE_SINT;
+ recv_int_page = event->flags32;
+ }
+
+
/* Check events */
if (!recv_int_page)
@@ -307,12 +405,16 @@ int vmbus_post_msg(void *buffer, size_t buflen)
/*
* vmbus_set_event - Send an event notification to the parent
*/
-int vmbus_set_event(u32 child_relid)
+int vmbus_set_event(struct vmbus_channel *channel)
{
- /* Each u32 represents 32 channels */
- sync_set_bit(child_relid & 31,
- (unsigned long *)vmbus_connection.send_int_page +
- (child_relid >> 5));
+ u32 child_relid = channel->offermsg.child_relid;
+
+ if (!channel->is_dedicated_interrupt) {
+ /* Each u32 represents 32 channels */
+ sync_set_bit(child_relid & 31,
+ (unsigned long *)vmbus_connection.send_int_page +
+ (child_relid >> 5));
+ }
- return hv_signal_event();
+ return hv_signal_event(channel->sig_event);
}
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 3648f8f0f36..1c5481da6e4 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -27,6 +27,7 @@
#include <linux/vmalloc.h>
#include <linux/hyperv.h>
#include <linux/version.h>
+#include <linux/interrupt.h>
#include <asm/hyperv.h>
#include "hyperv_vmbus.h"
@@ -34,13 +35,16 @@
struct hv_context hv_context = {
.synic_initialized = false,
.hypercall_page = NULL,
- .signal_event_param = NULL,
- .signal_event_buffer = NULL,
};
/*
* query_hypervisor_info - Get version info of the windows hypervisor
*/
+unsigned int host_info_eax;
+unsigned int host_info_ebx;
+unsigned int host_info_ecx;
+unsigned int host_info_edx;
+
static int query_hypervisor_info(void)
{
unsigned int eax;
@@ -70,13 +74,10 @@ static int query_hypervisor_info(void)
edx = 0;
op = HVCPUID_VERSION;
cpuid(op, &eax, &ebx, &ecx, &edx);
- pr_info("Hyper-V Host OS Build:%d-%d.%d-%d-%d.%d\n",
- eax,
- ebx >> 16,
- ebx & 0xFFFF,
- ecx,
- edx >> 24,
- edx & 0xFFFFFF);
+ host_info_eax = eax;
+ host_info_ebx = ebx;
+ host_info_ecx = ecx;
+ host_info_edx = edx;
}
return max_leaf;
}
@@ -137,6 +138,10 @@ int hv_init(void)
memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS);
memset(hv_context.synic_message_page, 0,
sizeof(void *) * NR_CPUS);
+ memset(hv_context.vp_index, 0,
+ sizeof(int) * NR_CPUS);
+ memset(hv_context.event_dpc, 0,
+ sizeof(void *) * NR_CPUS);
max_leaf = query_hypervisor_info();
@@ -168,24 +173,6 @@ int hv_init(void)
hv_context.hypercall_page = virtaddr;
- /* Setup the global signal event param for the signal event hypercall */
- hv_context.signal_event_buffer =
- kmalloc(sizeof(struct hv_input_signal_event_buffer),
- GFP_KERNEL);
- if (!hv_context.signal_event_buffer)
- goto cleanup;
-
- hv_context.signal_event_param =
- (struct hv_input_signal_event *)
- (ALIGN((unsigned long)
- hv_context.signal_event_buffer,
- HV_HYPERCALL_PARAM_ALIGN));
- hv_context.signal_event_param->connectionid.asu32 = 0;
- hv_context.signal_event_param->connectionid.u.id =
- VMBUS_EVENT_CONNECTION_ID;
- hv_context.signal_event_param->flag_number = 0;
- hv_context.signal_event_param->rsvdz = 0;
-
return 0;
cleanup:
@@ -213,10 +200,6 @@ void hv_cleanup(void)
/* Reset our OS id */
wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0);
- kfree(hv_context.signal_event_buffer);
- hv_context.signal_event_buffer = NULL;
- hv_context.signal_event_param = NULL;
-
if (hv_context.hypercall_page) {
hypercall_msr.as_uint64 = 0;
wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
@@ -273,13 +256,12 @@ int hv_post_message(union hv_connection_id connection_id,
*
* This involves a hypercall.
*/
-u16 hv_signal_event(void)
+u16 hv_signal_event(void *con_id)
{
u16 status;
- status = do_hypercall(HVCALL_SIGNAL_EVENT,
- hv_context.signal_event_param,
- NULL) & 0xFFFF;
+ status = (do_hypercall(HVCALL_SIGNAL_EVENT, con_id, NULL) & 0xFFFF);
+
return status;
}
@@ -297,6 +279,7 @@ void hv_synic_init(void *irqarg)
union hv_synic_siefp siefp;
union hv_synic_sint shared_sint;
union hv_synic_scontrol sctrl;
+ u64 vp_index;
u32 irq_vector = *((u32 *)(irqarg));
int cpu = smp_processor_id();
@@ -307,6 +290,15 @@ void hv_synic_init(void *irqarg)
/* Check the version */
rdmsrl(HV_X64_MSR_SVERSION, version);
+ hv_context.event_dpc[cpu] = (struct tasklet_struct *)
+ kmalloc(sizeof(struct tasklet_struct),
+ GFP_ATOMIC);
+ if (hv_context.event_dpc[cpu] == NULL) {
+ pr_err("Unable to allocate event dpc\n");
+ goto cleanup;
+ }
+ tasklet_init(hv_context.event_dpc[cpu], vmbus_on_event, cpu);
+
hv_context.synic_message_page[cpu] =
(void *)get_zeroed_page(GFP_ATOMIC);
@@ -345,7 +337,7 @@ void hv_synic_init(void *irqarg)
shared_sint.as_uint64 = 0;
shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */
shared_sint.masked = false;
- shared_sint.auto_eoi = false;
+ shared_sint.auto_eoi = true;
wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
@@ -356,6 +348,14 @@ void hv_synic_init(void *irqarg)
wrmsrl(HV_X64_MSR_SCONTROL, sctrl.as_uint64);
hv_context.synic_initialized = true;
+
+ /*
+ * Setup the mapping between Hyper-V's notion
+ * of cpuid and Linux' notion of cpuid.
+ * This array will be indexed using Linux cpuid.
+ */
+ rdmsrl(HV_X64_MSR_VP_INDEX, vp_index);
+ hv_context.vp_index[cpu] = (u32)vp_index;
return;
cleanup:
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index dd289fd179c..37873213e24 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -29,7 +29,6 @@
#include <linux/memory_hotplug.h>
#include <linux/memory.h>
#include <linux/notifier.h>
-#include <linux/mman.h>
#include <linux/percpu_counter.h>
#include <linux/hyperv.h>
@@ -415,10 +414,17 @@ struct dm_info_msg {
static bool hot_add;
static bool do_hot_add;
+/*
+ * Delay reporting memory pressure by
+ * the specified number of seconds.
+ */
+static uint pressure_report_delay = 30;
module_param(hot_add, bool, (S_IRUGO | S_IWUSR));
MODULE_PARM_DESC(hot_add, "If set attempt memory hot_add");
+module_param(pressure_report_delay, uint, (S_IRUGO | S_IWUSR));
+MODULE_PARM_DESC(pressure_report_delay, "Delay in secs in reporting pressure");
static atomic_t trans_id = ATOMIC_INIT(0);
static int dm_ring_size = (5 * PAGE_SIZE);
@@ -517,6 +523,34 @@ static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg)
}
}
+unsigned long compute_balloon_floor(void)
+{
+ unsigned long min_pages;
+#define MB2PAGES(mb) ((mb) << (20 - PAGE_SHIFT))
+ /* Simple continuous piecewiese linear function:
+ * max MiB -> min MiB gradient
+ * 0 0
+ * 16 16
+ * 32 24
+ * 128 72 (1/2)
+ * 512 168 (1/4)
+ * 2048 360 (1/8)
+ * 8192 552 (1/32)
+ * 32768 1320
+ * 131072 4392
+ */
+ if (totalram_pages < MB2PAGES(128))
+ min_pages = MB2PAGES(8) + (totalram_pages >> 1);
+ else if (totalram_pages < MB2PAGES(512))
+ min_pages = MB2PAGES(40) + (totalram_pages >> 2);
+ else if (totalram_pages < MB2PAGES(2048))
+ min_pages = MB2PAGES(104) + (totalram_pages >> 3);
+ else
+ min_pages = MB2PAGES(296) + (totalram_pages >> 5);
+#undef MB2PAGES
+ return min_pages;
+}
+
/*
* Post our status as it relates memory pressure to the
* host. Host expects the guests to post this status
@@ -530,15 +564,30 @@ static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg)
static void post_status(struct hv_dynmem_device *dm)
{
struct dm_status status;
+ struct sysinfo val;
-
+ if (pressure_report_delay > 0) {
+ --pressure_report_delay;
+ return;
+ }
+ si_meminfo(&val);
memset(&status, 0, sizeof(struct dm_status));
status.hdr.type = DM_STATUS_REPORT;
status.hdr.size = sizeof(struct dm_status);
status.hdr.trans_id = atomic_inc_return(&trans_id);
-
- status.num_committed = vm_memory_committed();
+ /*
+ * The host expects the guest to report free memory.
+ * Further, the host expects the pressure information to
+ * include the ballooned out pages.
+ * For a given amount of memory that we are managing, we
+ * need to compute a floor below which we should not balloon.
+ * Compute this and add it to the pressure report.
+ */
+ status.num_avail = val.freeram;
+ status.num_committed = vm_memory_committed() +
+ dm->num_pages_ballooned +
+ compute_balloon_floor();
vmbus_sendpacket(dm->dev->channel, &status,
sizeof(struct dm_status),
@@ -547,8 +596,6 @@ static void post_status(struct hv_dynmem_device *dm)
}
-
-
static void free_balloon_pages(struct hv_dynmem_device *dm,
union dm_mem_page_range *range_array)
{
@@ -1013,9 +1060,7 @@ static int balloon_remove(struct hv_device *dev)
static const struct hv_vmbus_device_id id_table[] = {
/* Dynamic Memory Class ID */
/* 525074DC-8985-46e2-8057-A307DC18A502 */
- { VMBUS_DEVICE(0xdc, 0x74, 0x50, 0X52, 0x85, 0x89, 0xe2, 0x46,
- 0x80, 0x57, 0xa3, 0x07, 0xdc, 0x18, 0xa5, 0x02)
- },
+ { HV_DM_GUID, },
{ },
};
diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index a0667de7a04..1d4cbd8e826 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -49,6 +49,16 @@ static struct hv_util_service util_kvp = {
.util_deinit = hv_kvp_deinit,
};
+static void perform_shutdown(struct work_struct *dummy)
+{
+ orderly_poweroff(true);
+}
+
+/*
+ * Perform the shutdown operation in a thread context.
+ */
+static DECLARE_WORK(shutdown_work, perform_shutdown);
+
static void shutdown_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
@@ -106,7 +116,7 @@ static void shutdown_onchannelcallback(void *context)
}
if (execute_shutdown == true)
- orderly_poweroff(true);
+ schedule_work(&shutdown_work);
}
/*
@@ -274,6 +284,16 @@ static int util_probe(struct hv_device *dev,
}
}
+ /*
+ * The set of services managed by the util driver are not performance
+ * critical and do not need batched reading. Furthermore, some services
+ * such as KVP can only handle one message from the host at a time.
+ * Turn off batched reading for all util drivers before we open the
+ * channel.
+ */
+
+ set_channel_read_state(dev->channel, false);
+
ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, 0,
srv->util_cb, dev->channel);
if (ret)
@@ -304,21 +324,21 @@ static int util_remove(struct hv_device *dev)
static const struct hv_vmbus_device_id id_table[] = {
/* Shutdown guid */
- { VMBUS_DEVICE(0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
- 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB)
- .driver_data = (unsigned long)&util_shutdown },
+ { HV_SHUTDOWN_GUID,
+ .driver_data = (unsigned long)&util_shutdown
+ },
/* Time synch guid */
- { VMBUS_DEVICE(0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49,
- 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf)
- .driver_data = (unsigned long)&util_timesynch },
+ { HV_TS_GUID,
+ .driver_data = (unsigned long)&util_timesynch
+ },
/* Heartbeat guid */
- { VMBUS_DEVICE(0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
- 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d)
- .driver_data = (unsigned long)&util_heartbeat },
+ { HV_HEART_BEAT_GUID,
+ .driver_data = (unsigned long)&util_heartbeat
+ },
/* KVP guid */
- { VMBUS_DEVICE(0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d,
- 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6)
- .driver_data = (unsigned long)&util_kvp },
+ { HV_KVP_GUID,
+ .driver_data = (unsigned long)&util_kvp
+ },
{ },
};
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index d8d1fadb398..12f2f9e989f 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -101,15 +101,6 @@ enum hv_message_type {
/* Define invalid partition identifier. */
#define HV_PARTITION_ID_INVALID ((u64)0x0)
-/* Define connection identifier type. */
-union hv_connection_id {
- u32 asu32;
- struct {
- u32 id:24;
- u32 reserved:8;
- } u;
-};
-
/* Define port identifier type. */
union hv_port_id {
u32 asu32;
@@ -338,13 +329,6 @@ struct hv_input_post_message {
u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
};
-/* Definition of the hv_signal_event hypercall input structure. */
-struct hv_input_signal_event {
- union hv_connection_id connectionid;
- u16 flag_number;
- u16 rsvdz;
-};
-
/*
* Versioning definitions used for guests reporting themselves to the
* hypervisor, and visa versa.
@@ -498,11 +482,6 @@ static const uuid_le VMBUS_SERVICE_ID = {
-struct hv_input_signal_event_buffer {
- u64 align8;
- struct hv_input_signal_event event;
-};
-
struct hv_context {
/* We only support running on top of Hyper-V
* So at this point this really can only contain the Hyper-V ID
@@ -513,16 +492,24 @@ struct hv_context {
bool synic_initialized;
- /*
- * This is used as an input param to HvCallSignalEvent hypercall. The
- * input param is immutable in our usage and must be dynamic mem (vs
- * stack or global). */
- struct hv_input_signal_event_buffer *signal_event_buffer;
- /* 8-bytes aligned of the buffer above */
- struct hv_input_signal_event *signal_event_param;
-
void *synic_message_page[NR_CPUS];
void *synic_event_page[NR_CPUS];
+ /*
+ * Hypervisor's notion of virtual processor ID is different from
+ * Linux' notion of CPU ID. This information can only be retrieved
+ * in the context of the calling CPU. Setup a map for easy access
+ * to this information:
+ *
+ * vp_index[a] is the Hyper-V's processor ID corresponding to
+ * Linux cpuid 'a'.
+ */
+ u32 vp_index[NR_CPUS];
+ /*
+ * Starting with win8, we can take channel interrupts on any CPU;
+ * we will manage the tasklet that handles events on a per CPU
+ * basis.
+ */
+ struct tasklet_struct *event_dpc[NR_CPUS];
};
extern struct hv_context hv_context;
@@ -538,12 +525,19 @@ extern int hv_post_message(union hv_connection_id connection_id,
enum hv_message_type message_type,
void *payload, size_t payload_size);
-extern u16 hv_signal_event(void);
+extern u16 hv_signal_event(void *con_id);
extern void hv_synic_init(void *irqarg);
extern void hv_synic_cleanup(void *arg);
+/*
+ * Host version information.
+ */
+extern unsigned int host_info_eax;
+extern unsigned int host_info_ebx;
+extern unsigned int host_info_ecx;
+extern unsigned int host_info_edx;
/* Interface */
@@ -555,7 +549,7 @@ void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info,
struct scatterlist *sglist,
- u32 sgcount);
+ u32 sgcount, bool *signal);
int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer,
u32 buflen);
@@ -563,13 +557,16 @@ int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer,
int hv_ringbuffer_read(struct hv_ring_buffer_info *ring_info,
void *buffer,
u32 buflen,
- u32 offset);
+ u32 offset, bool *signal);
-u32 hv_get_ringbuffer_interrupt_mask(struct hv_ring_buffer_info *ring_info);
void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info);
+void hv_begin_read(struct hv_ring_buffer_info *rbi);
+
+u32 hv_end_read(struct hv_ring_buffer_info *rbi);
+
/*
* Maximum channels is determined by the size of the interrupt page
* which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
@@ -657,7 +654,7 @@ int vmbus_connect(void);
int vmbus_post_msg(void *buffer, size_t buflen);
-int vmbus_set_event(u32 child_relid);
+int vmbus_set_event(struct vmbus_channel *channel);
void vmbus_on_event(unsigned long data);
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index 7233c88f01b..cafa72ffdc3 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -29,6 +29,105 @@
#include "hyperv_vmbus.h"
+void hv_begin_read(struct hv_ring_buffer_info *rbi)
+{
+ rbi->ring_buffer->interrupt_mask = 1;
+ smp_mb();
+}
+
+u32 hv_end_read(struct hv_ring_buffer_info *rbi)
+{
+ u32 read;
+ u32 write;
+
+ rbi->ring_buffer->interrupt_mask = 0;
+ smp_mb();
+
+ /*
+ * Now check to see if the ring buffer is still empty.
+ * If it is not, we raced and we need to process new
+ * incoming messages.
+ */
+ hv_get_ringbuffer_availbytes(rbi, &read, &write);
+
+ return read;
+}
+
+/*
+ * When we write to the ring buffer, check if the host needs to
+ * be signaled. Here is the details of this protocol:
+ *
+ * 1. The host guarantees that while it is draining the
+ * ring buffer, it will set the interrupt_mask to
+ * indicate it does not need to be interrupted when
+ * new data is placed.
+ *
+ * 2. The host guarantees that it will completely drain
+ * the ring buffer before exiting the read loop. Further,
+ * once the ring buffer is empty, it will clear the
+ * interrupt_mask and re-check to see if new data has
+ * arrived.
+ */
+
+static bool hv_need_to_signal(u32 old_write, struct hv_ring_buffer_info *rbi)
+{
+ if (rbi->ring_buffer->interrupt_mask)
+ return false;
+
+ /*
+ * This is the only case we need to signal when the
+ * ring transitions from being empty to non-empty.
+ */
+ if (old_write == rbi->ring_buffer->read_index)
+ return true;
+
+ return false;
+}
+
+/*
+ * To optimize the flow management on the send-side,
+ * when the sender is blocked because of lack of
+ * sufficient space in the ring buffer, potential the
+ * consumer of the ring buffer can signal the producer.
+ * This is controlled by the following parameters:
+ *
+ * 1. pending_send_sz: This is the size in bytes that the
+ * producer is trying to send.
+ * 2. The feature bit feat_pending_send_sz set to indicate if
+ * the consumer of the ring will signal when the ring
+ * state transitions from being full to a state where
+ * there is room for the producer to send the pending packet.
+ */
+
+static bool hv_need_to_signal_on_read(u32 old_rd,
+ struct hv_ring_buffer_info *rbi)
+{
+ u32 prev_write_sz;
+ u32 cur_write_sz;
+ u32 r_size;
+ u32 write_loc = rbi->ring_buffer->write_index;
+ u32 read_loc = rbi->ring_buffer->read_index;
+ u32 pending_sz = rbi->ring_buffer->pending_send_sz;
+
+ /*
+ * If the other end is not blocked on write don't bother.
+ */
+ if (pending_sz == 0)
+ return false;
+
+ r_size = rbi->ring_datasize;
+ cur_write_sz = write_loc >= read_loc ? r_size - (write_loc - read_loc) :
+ read_loc - write_loc;
+
+ prev_write_sz = write_loc >= old_rd ? r_size - (write_loc - old_rd) :
+ old_rd - write_loc;
+
+
+ if ((prev_write_sz < pending_sz) && (cur_write_sz >= pending_sz))
+ return true;
+
+ return false;
+}
/*
* hv_get_next_write_location()
@@ -239,19 +338,6 @@ void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
}
}
-
-/*
- *
- * hv_get_ringbuffer_interrupt_mask()
- *
- * Get the interrupt mask for the specified ring buffer
- *
- */
-u32 hv_get_ringbuffer_interrupt_mask(struct hv_ring_buffer_info *rbi)
-{
- return rbi->ring_buffer->interrupt_mask;
-}
-
/*
*
* hv_ringbuffer_init()
@@ -298,7 +384,7 @@ void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info)
*
*/
int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info,
- struct scatterlist *sglist, u32 sgcount)
+ struct scatterlist *sglist, u32 sgcount, bool *signal)
{
int i = 0;
u32 bytes_avail_towrite;
@@ -307,6 +393,7 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info,
struct scatterlist *sg;
u32 next_write_location;
+ u32 old_write;
u64 prev_indices = 0;
unsigned long flags;
@@ -335,6 +422,8 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info,
/* Write to the ring buffer */
next_write_location = hv_get_next_write_location(outring_info);
+ old_write = next_write_location;
+
for_each_sg(sglist, sg, sgcount, i)
{
next_write_location = hv_copyto_ringbuffer(outring_info,
@@ -351,14 +440,16 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info,
&prev_indices,
sizeof(u64));
- /* Make sure we flush all writes before updating the writeIndex */
- smp_wmb();
+ /* Issue a full memory barrier before updating the write index */
+ smp_mb();
/* Now, update the write location */
hv_set_next_write_location(outring_info, next_write_location);
spin_unlock_irqrestore(&outring_info->ring_lock, flags);
+
+ *signal = hv_need_to_signal(old_write, outring_info);
return 0;
}
@@ -414,13 +505,14 @@ int hv_ringbuffer_peek(struct hv_ring_buffer_info *Inring_info,
*
*/
int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
- u32 buflen, u32 offset)
+ u32 buflen, u32 offset, bool *signal)
{
u32 bytes_avail_towrite;
u32 bytes_avail_toread;
u32 next_read_location = 0;
u64 prev_indices = 0;
unsigned long flags;
+ u32 old_read;
if (buflen <= 0)
return -EINVAL;
@@ -431,6 +523,8 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
&bytes_avail_toread,
&bytes_avail_towrite);
+ old_read = bytes_avail_toread;
+
/* Make sure there is something to read */
if (bytes_avail_toread < buflen) {
spin_unlock_irqrestore(&inring_info->ring_lock, flags);
@@ -461,5 +555,7 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
spin_unlock_irqrestore(&inring_info->ring_lock, flags);
+ *signal = hv_need_to_signal_on_read(old_read, inring_info);
+
return 0;
}
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 8e1a9ec5300..cf19dfa5ead 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -33,6 +33,7 @@
#include <acpi/acpi_bus.h>
#include <linux/completion.h>
#include <linux/hyperv.h>
+#include <linux/kernel_stat.h>
#include <asm/hyperv.h>
#include <asm/hypervisor.h>
#include "hyperv_vmbus.h"
@@ -41,7 +42,6 @@
static struct acpi_device *hv_acpi_dev;
static struct tasklet_struct msg_dpc;
-static struct tasklet_struct event_dpc;
static struct completion probe_event;
static int irq;
@@ -454,21 +454,40 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id)
union hv_synic_event_flags *event;
bool handled = false;
+ page_addr = hv_context.synic_event_page[cpu];
+ if (page_addr == NULL)
+ return IRQ_NONE;
+
+ event = (union hv_synic_event_flags *)page_addr +
+ VMBUS_MESSAGE_SINT;
/*
* Check for events before checking for messages. This is the order
* in which events and messages are checked in Windows guests on
* Hyper-V, and the Windows team suggested we do the same.
*/
- page_addr = hv_context.synic_event_page[cpu];
- event = (union hv_synic_event_flags *)page_addr + VMBUS_MESSAGE_SINT;
+ if ((vmbus_proto_version == VERSION_WS2008) ||
+ (vmbus_proto_version == VERSION_WIN7)) {
- /* Since we are a child, we only need to check bit 0 */
- if (sync_test_and_clear_bit(0, (unsigned long *) &event->flags32[0])) {
+ /* Since we are a child, we only need to check bit 0 */
+ if (sync_test_and_clear_bit(0,
+ (unsigned long *) &event->flags32[0])) {
+ handled = true;
+ }
+ } else {
+ /*
+ * Our host is win8 or above. The signaling mechanism
+ * has changed and we can directly look at the event page.
+ * If bit n is set then we have an interrup on the channel
+ * whose id is n.
+ */
handled = true;
- tasklet_schedule(&event_dpc);
}
+ if (handled)
+ tasklet_schedule(hv_context.event_dpc[cpu]);
+
+
page_addr = hv_context.synic_message_page[cpu];
msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
@@ -485,6 +504,19 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id)
}
/*
+ * vmbus interrupt flow handler:
+ * vmbus interrupts can concurrently occur on multiple CPUs and
+ * can be handled concurrently.
+ */
+
+static void vmbus_flow_handler(unsigned int irq, struct irq_desc *desc)
+{
+ kstat_incr_irqs_this_cpu(irq, desc);
+
+ desc->action->handler(irq, desc->action->dev_id);
+}
+
+/*
* vmbus_bus_init -Main vmbus driver initialization routine.
*
* Here, we
@@ -506,7 +538,6 @@ static int vmbus_bus_init(int irq)
}
tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0);
- tasklet_init(&event_dpc, vmbus_on_event, 0);
ret = bus_register(&hv_bus);
if (ret)
@@ -520,6 +551,13 @@ static int vmbus_bus_init(int irq)
goto err_unregister;
}
+ /*
+ * Vmbus interrupts can be handled concurrently on
+ * different CPUs. Establish an appropriate interrupt flow
+ * handler that can support this model.
+ */
+ irq_set_handler(irq, vmbus_flow_handler);
+
vector = IRQ0_VECTOR + irq;
/*
@@ -575,8 +613,6 @@ int __vmbus_driver_register(struct hv_driver *hv_driver, struct module *owner, c
ret = driver_register(&hv_driver->driver);
- vmbus_request_offers();
-
return ret;
}
EXPORT_SYMBOL_GPL(__vmbus_driver_register);
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index ab20a0851dd..141094e7c06 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -20,7 +20,6 @@
#include <linux/serial.h>
#include <linux/tty_flip.h>
#include <linux/slab.h>
-#include <linux/atomic.h>
#include <linux/io.h>
#include <linux/ipack.h>
#include "ipoctal.h"
@@ -38,21 +37,19 @@ struct ipoctal_channel {
spinlock_t lock;
unsigned int pointer_read;
unsigned int pointer_write;
- atomic_t open;
struct tty_port tty_port;
union scc2698_channel __iomem *regs;
union scc2698_block __iomem *block_regs;
unsigned int board_id;
- unsigned char *board_write;
u8 isr_rx_rdy_mask;
u8 isr_tx_rdy_mask;
+ unsigned int rx_enable;
};
struct ipoctal {
struct ipack_device *dev;
unsigned int board_id;
struct ipoctal_channel channel[NR_CHANNELS];
- unsigned char write;
struct tty_driver *tty_drv;
u8 __iomem *mem8_space;
u8 __iomem *int_space;
@@ -64,28 +61,23 @@ static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty)
channel = dev_get_drvdata(tty->dev);
+ /*
+ * Enable RX. TX will be enabled when
+ * there is something to send
+ */
iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
+ channel->rx_enable = 1;
return 0;
}
static int ipoctal_open(struct tty_struct *tty, struct file *file)
{
- int res;
struct ipoctal_channel *channel;
channel = dev_get_drvdata(tty->dev);
-
- if (atomic_read(&channel->open))
- return -EBUSY;
-
tty->driver_data = channel;
- res = tty_port_open(&channel->tty_port, tty, file);
- if (res)
- return res;
-
- atomic_inc(&channel->open);
- return 0;
+ return tty_port_open(&channel->tty_port, tty, file);
}
static void ipoctal_reset_stats(struct ipoctal_stats *stats)
@@ -111,9 +103,7 @@ static void ipoctal_close(struct tty_struct *tty, struct file *filp)
struct ipoctal_channel *channel = tty->driver_data;
tty_port_close(&channel->tty_port, tty, filp);
-
- if (atomic_dec_and_test(&channel->open))
- ipoctal_free_channel(channel);
+ ipoctal_free_channel(channel);
}
static int ipoctal_get_icount(struct tty_struct *tty,
@@ -137,11 +127,12 @@ static void ipoctal_irq_rx(struct ipoctal_channel *channel, u8 sr)
{
struct tty_port *port = &channel->tty_port;
unsigned char value;
- unsigned char flag = TTY_NORMAL;
+ unsigned char flag;
u8 isr;
do {
value = ioread8(&channel->regs->r.rhr);
+ flag = TTY_NORMAL;
/* Error: count statistics */
if (sr & SR_ERROR) {
iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);
@@ -183,10 +174,8 @@ static void ipoctal_irq_tx(struct ipoctal_channel *channel)
unsigned char value;
unsigned int *pointer_write = &channel->pointer_write;
- if (channel->nb_bytes <= 0) {
- channel->nb_bytes = 0;
+ if (channel->nb_bytes == 0)
return;
- }
value = channel->tty_port.xmit_buf[*pointer_write];
iowrite8(value, &channel->regs->w.thr);
@@ -194,39 +183,27 @@ static void ipoctal_irq_tx(struct ipoctal_channel *channel)
(*pointer_write)++;
*pointer_write = *pointer_write % PAGE_SIZE;
channel->nb_bytes--;
-
- if ((channel->nb_bytes == 0) &&
- (waitqueue_active(&channel->queue))) {
-
- if (channel->board_id != IPACK1_DEVICE_ID_SBS_OCTAL_485) {
- *channel->board_write = 1;
- wake_up_interruptible(&channel->queue);
- }
- }
}
static void ipoctal_irq_channel(struct ipoctal_channel *channel)
{
u8 isr, sr;
- /* If there is no client, skip the check */
- if (!atomic_read(&channel->open))
- return;
-
+ spin_lock(&channel->lock);
/* The HW is organized in pair of channels. See which register we need
* to read from */
isr = ioread8(&channel->block_regs->r.isr);
sr = ioread8(&channel->regs->r.sr);
- /* In case of RS-485, change from TX to RX when finishing TX.
- * Half-duplex. */
- if ((channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) &&
- (sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) {
+ if ((sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) {
iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);
- iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr);
- iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
- *channel->board_write = 1;
- wake_up_interruptible(&channel->queue);
+ /* In case of RS-485, change from TX to RX when finishing TX.
+ * Half-duplex. */
+ if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) {
+ iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr);
+ iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
+ channel->rx_enable = 1;
+ }
}
/* RX data */
@@ -237,7 +214,7 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel)
if ((isr & channel->isr_tx_rdy_mask) && (sr & SR_TX_READY))
ipoctal_irq_tx(channel);
- tty_flip_buffer_push(&channel->tty_port);
+ spin_unlock(&channel->lock);
}
static irqreturn_t ipoctal_irq_handler(void *arg)
@@ -245,14 +222,14 @@ static irqreturn_t ipoctal_irq_handler(void *arg)
unsigned int i;
struct ipoctal *ipoctal = (struct ipoctal *) arg;
- /* Check all channels */
- for (i = 0; i < NR_CHANNELS; i++)
- ipoctal_irq_channel(&ipoctal->channel[i]);
-
/* Clear the IPack device interrupt */
readw(ipoctal->int_space + ACK_INT_REQ0);
readw(ipoctal->int_space + ACK_INT_REQ1);
+ /* Check all channels */
+ for (i = 0; i < NR_CHANNELS; i++)
+ ipoctal_irq_channel(&ipoctal->channel[i]);
+
return IRQ_HANDLED;
}
@@ -306,7 +283,7 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
ipoctal->mem8_space =
devm_ioremap_nocache(&ipoctal->dev->dev,
region->start, 0x8000);
- if (!addr) {
+ if (!ipoctal->mem8_space) {
dev_err(&ipoctal->dev->dev,
"Unable to map slot [%d:%d] MEM8 space!\n",
bus_nr, slot);
@@ -319,7 +296,6 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
struct ipoctal_channel *channel = &ipoctal->channel[i];
channel->regs = chan_regs + i;
channel->block_regs = block_regs + (i >> 1);
- channel->board_write = &ipoctal->write;
channel->board_id = ipoctal->board_id;
if (i & 1) {
channel->isr_tx_rdy_mask = ISR_TxRDY_B;
@@ -330,6 +306,7 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
}
iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
+ channel->rx_enable = 0;
iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
iowrite8(MR1_CHRL_8_BITS | MR1_ERROR_CHAR | MR1_RxINT_RxRDY,
@@ -402,8 +379,6 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
ipoctal_reset_stats(&channel->stats);
channel->nb_bytes = 0;
- init_waitqueue_head(&channel->queue);
-
spin_lock_init(&channel->lock);
channel->pointer_read = 0;
channel->pointer_write = 0;
@@ -414,12 +389,6 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
continue;
}
dev_set_drvdata(tty_dev, channel);
-
- /*
- * Enable again the RX. TX will be enabled when
- * there is something to send
- */
- iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
}
return 0;
@@ -459,6 +428,7 @@ static int ipoctal_write_tty(struct tty_struct *tty,
/* As the IP-OCTAL 485 only supports half duplex, do it manually */
if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) {
iowrite8(CR_DISABLE_RX, &channel->regs->w.cr);
+ channel->rx_enable = 0;
iowrite8(CR_CMD_ASSERT_RTSN, &channel->regs->w.cr);
}
@@ -467,10 +437,6 @@ static int ipoctal_write_tty(struct tty_struct *tty,
* operations
*/
iowrite8(CR_ENABLE_TX, &channel->regs->w.cr);
- wait_event_interruptible(channel->queue, *channel->board_write);
- iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);
-
- *channel->board_write = 0;
return char_copied;
}
@@ -622,8 +588,9 @@ static void ipoctal_set_termios(struct tty_struct *tty,
iowrite8(mr2, &channel->regs->w.mr);
iowrite8(csr, &channel->regs->w.csr);
- /* Enable again the RX */
- iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
+ /* Enable again the RX, if it was before */
+ if (channel->rx_enable)
+ iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);
}
static void ipoctal_hangup(struct tty_struct *tty)
@@ -643,6 +610,7 @@ static void ipoctal_hangup(struct tty_struct *tty)
tty_port_hangup(&channel->tty_port);
iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
+ channel->rx_enable = 0;
iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);
@@ -652,6 +620,22 @@ static void ipoctal_hangup(struct tty_struct *tty)
wake_up_interruptible(&channel->tty_port.open_wait);
}
+static void ipoctal_shutdown(struct tty_struct *tty)
+{
+ struct ipoctal_channel *channel = tty->driver_data;
+
+ if (channel == NULL)
+ return;
+
+ iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
+ channel->rx_enable = 0;
+ iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
+ iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
+ iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);
+ iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr);
+ clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);
+}
+
static const struct tty_operations ipoctal_fops = {
.ioctl = NULL,
.open = ipoctal_open,
@@ -662,6 +646,7 @@ static const struct tty_operations ipoctal_fops = {
.chars_in_buffer = ipoctal_chars_in_buffer,
.get_icount = ipoctal_get_icount,
.hangup = ipoctal_hangup,
+ .shutdown = ipoctal_shutdown,
};
static int ipoctal_probe(struct ipack_device *dev)
diff --git a/drivers/mfd/wm5102-tables.c b/drivers/mfd/wm5102-tables.c
index f6fcb87b350..a9d9d41d95d 100644
--- a/drivers/mfd/wm5102-tables.c
+++ b/drivers/mfd/wm5102-tables.c
@@ -84,6 +84,12 @@ int wm5102_patch(struct arizona *arizona)
}
static const struct regmap_irq wm5102_aod_irqs[ARIZONA_NUM_IRQ] = {
+ [ARIZONA_IRQ_MICD_CLAMP_FALL] = {
+ .mask = ARIZONA_MICD_CLAMP_FALL_EINT1
+ },
+ [ARIZONA_IRQ_MICD_CLAMP_RISE] = {
+ .mask = ARIZONA_MICD_CLAMP_RISE_EINT1
+ },
[ARIZONA_IRQ_GP5_FALL] = { .mask = ARIZONA_GP5_FALL_EINT1 },
[ARIZONA_IRQ_GP5_RISE] = { .mask = ARIZONA_GP5_RISE_EINT1 },
[ARIZONA_IRQ_JD_FALL] = { .mask = ARIZONA_JD1_FALL_EINT1 },
@@ -313,6 +319,7 @@ static const struct reg_default wm5102_reg_default[] = {
{ 0x0000021A, 0x01A6 }, /* R538 - Mic Bias Ctrl 3 */
{ 0x00000293, 0x0000 }, /* R659 - Accessory Detect Mode 1 */
{ 0x0000029B, 0x0020 }, /* R667 - Headphone Detect 1 */
+ { 0x000002A2, 0x0000 }, /* R674 - Micd clamp control */
{ 0x000002A3, 0x1102 }, /* R675 - Mic Detect 1 */
{ 0x000002A4, 0x009F }, /* R676 - Mic Detect 2 */
{ 0x000002A5, 0x0000 }, /* R677 - Mic Detect 3 */
@@ -1107,6 +1114,8 @@ static bool wm5102_readable_register(struct device *dev, unsigned int reg)
case ARIZONA_ACCESSORY_DETECT_MODE_1:
case ARIZONA_HEADPHONE_DETECT_1:
case ARIZONA_HEADPHONE_DETECT_2:
+ case ARIZONA_HP_DACVAL:
+ case ARIZONA_MICD_CLAMP_CONTROL:
case ARIZONA_MIC_DETECT_1:
case ARIZONA_MIC_DETECT_2:
case ARIZONA_MIC_DETECT_3:
@@ -1876,6 +1885,7 @@ static bool wm5102_volatile_register(struct device *dev, unsigned int reg)
case ARIZONA_DSP1_STATUS_2:
case ARIZONA_DSP1_STATUS_3:
case ARIZONA_HEADPHONE_DETECT_2:
+ case ARIZONA_HP_DACVAL:
case ARIZONA_MIC_DETECT_3:
return true;
default:
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 668a5822ab4..e83fdfe0c8c 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -499,6 +499,17 @@ config USB_SWITCH_FSA9480
stereo and mono audio, video, microphone and UART data to use
a common connector port.
+config LATTICE_ECP3_CONFIG
+ tristate "Lattice ECP3 FPGA bitstream configuration via SPI"
+ depends on SPI && SYSFS
+ select FW_LOADER
+ default n
+ help
+ This option enables support for bitstream configuration (programming
+ or loading) of the Lattice ECP3 FPGA family via SPI.
+
+ If unsure, say N.
+
source "drivers/misc/c2port/Kconfig"
source "drivers/misc/eeprom/Kconfig"
source "drivers/misc/cb710/Kconfig"
@@ -507,4 +518,5 @@ source "drivers/misc/lis3lv02d/Kconfig"
source "drivers/misc/carma/Kconfig"
source "drivers/misc/altera-stapl/Kconfig"
source "drivers/misc/mei/Kconfig"
+source "drivers/misc/vmw_vmci/Kconfig"
endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 2129377c0de..35a1463c72d 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -49,3 +49,6 @@ obj-y += carma/
obj-$(CONFIG_USB_SWITCH_FSA9480) += fsa9480.o
obj-$(CONFIG_ALTERA_STAPL) +=altera-stapl/
obj-$(CONFIG_INTEL_MEI) += mei/
+obj-$(CONFIG_MAX8997_MUIC) += max8997-muic.o
+obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci/
+obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o
diff --git a/drivers/misc/cb710/Kconfig b/drivers/misc/cb710/Kconfig
index 22429b8b106..5acb9c5b49c 100644
--- a/drivers/misc/cb710/Kconfig
+++ b/drivers/misc/cb710/Kconfig
@@ -1,6 +1,6 @@
config CB710_CORE
tristate "ENE CB710/720 Flash memory card reader support"
- depends on PCI
+ depends on PCI && GENERIC_HARDIRQS
help
This option enables support for PCI ENE CB710/720 Flash memory card
reader found in some laptops (ie. some versions of HP Compaq nx9500).
diff --git a/drivers/misc/lattice-ecp3-config.c b/drivers/misc/lattice-ecp3-config.c
new file mode 100644
index 00000000000..155700bfd2b
--- /dev/null
+++ b/drivers/misc/lattice-ecp3-config.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2012 Stefan Roese <sr@denx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/spi/spi.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#define FIRMWARE_NAME "lattice-ecp3.bit"
+
+/*
+ * The JTAG ID's of the supported FPGA's. The ID is 32bit wide
+ * reversed as noted in the manual.
+ */
+#define ID_ECP3_17 0xc2088080
+#define ID_ECP3_35 0xc2048080
+
+/* FPGA commands */
+#define FPGA_CMD_READ_ID 0x07 /* plus 24 bits */
+#define FPGA_CMD_READ_STATUS 0x09 /* plus 24 bits */
+#define FPGA_CMD_CLEAR 0x70
+#define FPGA_CMD_REFRESH 0x71
+#define FPGA_CMD_WRITE_EN 0x4a /* plus 2 bits */
+#define FPGA_CMD_WRITE_DIS 0x4f /* plus 8 bits */
+#define FPGA_CMD_WRITE_INC 0x41 /* plus 0 bits */
+
+/*
+ * The status register is 32bit revered, DONE is bit 17 from the TN1222.pdf
+ * (LatticeECP3 Slave SPI Port User's Guide)
+ */
+#define FPGA_STATUS_DONE 0x00004000
+#define FPGA_STATUS_CLEARED 0x00010000
+
+#define FPGA_CLEAR_TIMEOUT 5000 /* max. 5000ms for FPGA clear */
+#define FPGA_CLEAR_MSLEEP 10
+#define FPGA_CLEAR_LOOP_COUNT (FPGA_CLEAR_TIMEOUT / FPGA_CLEAR_MSLEEP)
+
+struct fpga_data {
+ struct completion fw_loaded;
+};
+
+struct ecp3_dev {
+ u32 jedec_id;
+ char *name;
+};
+
+static const struct ecp3_dev ecp3_dev[] = {
+ {
+ .jedec_id = ID_ECP3_17,
+ .name = "Lattice ECP3-17",
+ },
+ {
+ .jedec_id = ID_ECP3_35,
+ .name = "Lattice ECP3-35",
+ },
+};
+
+static void firmware_load(const struct firmware *fw, void *context)
+{
+ struct spi_device *spi = (struct spi_device *)context;
+ struct fpga_data *data = dev_get_drvdata(&spi->dev);
+ u8 *buffer;
+ int ret;
+ u8 txbuf[8];
+ u8 rxbuf[8];
+ int rx_len = 8;
+ int i;
+ u32 jedec_id;
+ u32 status;
+
+ if (fw->size == 0) {
+ dev_err(&spi->dev, "Error: Firmware size is 0!\n");
+ return;
+ }
+
+ /* Fill dummy data (24 stuffing bits for commands) */
+ txbuf[1] = 0x00;
+ txbuf[2] = 0x00;
+ txbuf[3] = 0x00;
+
+ /* Trying to speak with the FPGA via SPI... */
+ txbuf[0] = FPGA_CMD_READ_ID;
+ ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
+ dev_dbg(&spi->dev, "FPGA JTAG ID=%08x\n", *(u32 *)&rxbuf[4]);
+ jedec_id = *(u32 *)&rxbuf[4];
+
+ for (i = 0; i < ARRAY_SIZE(ecp3_dev); i++) {
+ if (jedec_id == ecp3_dev[i].jedec_id)
+ break;
+ }
+ if (i == ARRAY_SIZE(ecp3_dev)) {
+ dev_err(&spi->dev,
+ "Error: No supported FPGA detected (JEDEC_ID=%08x)!\n",
+ jedec_id);
+ return;
+ }
+
+ dev_info(&spi->dev, "FPGA %s detected\n", ecp3_dev[i].name);
+
+ txbuf[0] = FPGA_CMD_READ_STATUS;
+ ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
+ dev_dbg(&spi->dev, "FPGA Status=%08x\n", *(u32 *)&rxbuf[4]);
+
+ buffer = kzalloc(fw->size + 8, GFP_KERNEL);
+ if (!buffer) {
+ dev_err(&spi->dev, "Error: Can't allocate memory!\n");
+ return;
+ }
+
+ /*
+ * Insert WRITE_INC command into stream (one SPI frame)
+ */
+ buffer[0] = FPGA_CMD_WRITE_INC;
+ buffer[1] = 0xff;
+ buffer[2] = 0xff;
+ buffer[3] = 0xff;
+ memcpy(buffer + 4, fw->data, fw->size);
+
+ txbuf[0] = FPGA_CMD_REFRESH;
+ ret = spi_write(spi, txbuf, 4);
+
+ txbuf[0] = FPGA_CMD_WRITE_EN;
+ ret = spi_write(spi, txbuf, 4);
+
+ txbuf[0] = FPGA_CMD_CLEAR;
+ ret = spi_write(spi, txbuf, 4);
+
+ /*
+ * Wait for FPGA memory to become cleared
+ */
+ for (i = 0; i < FPGA_CLEAR_LOOP_COUNT; i++) {
+ txbuf[0] = FPGA_CMD_READ_STATUS;
+ ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
+ status = *(u32 *)&rxbuf[4];
+ if (status == FPGA_STATUS_CLEARED)
+ break;
+
+ msleep(FPGA_CLEAR_MSLEEP);
+ }
+
+ if (i == FPGA_CLEAR_LOOP_COUNT) {
+ dev_err(&spi->dev,
+ "Error: Timeout waiting for FPGA to clear (status=%08x)!\n",
+ status);
+ kfree(buffer);
+ return;
+ }
+
+ dev_info(&spi->dev, "Configuring the FPGA...\n");
+ ret = spi_write(spi, buffer, fw->size + 8);
+
+ txbuf[0] = FPGA_CMD_WRITE_DIS;
+ ret = spi_write(spi, txbuf, 4);
+
+ txbuf[0] = FPGA_CMD_READ_STATUS;
+ ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
+ dev_dbg(&spi->dev, "FPGA Status=%08x\n", *(u32 *)&rxbuf[4]);
+ status = *(u32 *)&rxbuf[4];
+
+ /* Check result */
+ if (status & FPGA_STATUS_DONE)
+ dev_info(&spi->dev, "FPGA succesfully configured!\n");
+ else
+ dev_info(&spi->dev, "FPGA not configured (DONE not set)\n");
+
+ /*
+ * Don't forget to release the firmware again
+ */
+ release_firmware(fw);
+
+ kfree(buffer);
+
+ complete(&data->fw_loaded);
+}
+
+static int lattice_ecp3_probe(struct spi_device *spi)
+{
+ struct fpga_data *data;
+ int err;
+
+ data = devm_kzalloc(&spi->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ dev_err(&spi->dev, "Memory allocation for fpga_data failed\n");
+ return -ENOMEM;
+ }
+ spi_set_drvdata(spi, data);
+
+ init_completion(&data->fw_loaded);
+ err = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG,
+ FIRMWARE_NAME, &spi->dev,
+ GFP_KERNEL, spi, firmware_load);
+ if (err) {
+ dev_err(&spi->dev, "Firmware loading failed with %d!\n", err);
+ return err;
+ }
+
+ dev_info(&spi->dev, "FPGA bitstream configuration driver registered\n");
+
+ return 0;
+}
+
+static int lattice_ecp3_remove(struct spi_device *spi)
+{
+ struct fpga_data *data = spi_get_drvdata(spi);
+
+ wait_for_completion(&data->fw_loaded);
+
+ return 0;
+}
+
+static const struct spi_device_id lattice_ecp3_id[] = {
+ { "ecp3-17", 0 },
+ { "ecp3-35", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, lattice_ecp3_id);
+
+static struct spi_driver lattice_ecp3_driver = {
+ .driver = {
+ .name = "lattice-ecp3",
+ .owner = THIS_MODULE,
+ },
+ .probe = lattice_ecp3_probe,
+ .remove = lattice_ecp3_remove,
+ .id_table = lattice_ecp3_id,
+};
+
+module_spi_driver(lattice_ecp3_driver);
+
+MODULE_AUTHOR("Stefan Roese <sr@denx.de>");
+MODULE_DESCRIPTION("Lattice ECP3 FPGA configuration via SPI");
+MODULE_LICENSE("GPL");
diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig
index 5a79ccde2fd..d21b4d006a5 100644
--- a/drivers/misc/mei/Kconfig
+++ b/drivers/misc/mei/Kconfig
@@ -1,11 +1,22 @@
config INTEL_MEI
- tristate "Intel Management Engine Interface (Intel MEI)"
+ tristate "Intel Management Engine Interface"
depends on X86 && PCI && WATCHDOG_CORE
help
The Intel Management Engine (Intel ME) provides Manageability,
Security and Media services for system containing Intel chipsets.
if selected /dev/mei misc device will be created.
+ For more information see
+ <http://software.intel.com/en-us/manageability/>
+
+config INTEL_MEI_ME
+ bool "ME Enabled Intel Chipsets"
+ depends on INTEL_MEI
+ depends on X86 && PCI && WATCHDOG_CORE
+ default y
+ help
+ MEI support for ME Enabled Intel chipsets.
+
Supported Chipsets are:
7 Series Chipset Family
6 Series Chipset Family
@@ -24,5 +35,3 @@ config INTEL_MEI
82Q33 Express
82X38/X48 Express
- For more information see
- <http://software.intel.com/en-us/manageability/>
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index 0017842e166..040af6c7b14 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -4,9 +4,11 @@
#
obj-$(CONFIG_INTEL_MEI) += mei.o
mei-objs := init.o
+mei-objs += hbm.o
mei-objs += interrupt.o
-mei-objs += interface.o
-mei-objs += iorw.o
+mei-objs += client.o
mei-objs += main.o
mei-objs += amthif.o
mei-objs += wd.o
+mei-$(CONFIG_INTEL_MEI_ME) += pci-me.o
+mei-$(CONFIG_INTEL_MEI_ME) += hw-me.o
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index e40ffd9502d..c86d7e3839a 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -31,15 +31,16 @@
#include <linux/jiffies.h>
#include <linux/uaccess.h>
+#include <linux/mei.h>
#include "mei_dev.h"
-#include "hw.h"
-#include <linux/mei.h>
-#include "interface.h"
+#include "hbm.h"
+#include "hw-me.h"
+#include "client.h"
-const uuid_le mei_amthi_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac,
- 0xa8, 0x46, 0xe0, 0xff, 0x65,
- 0x81, 0x4c);
+const uuid_le mei_amthif_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d,
+ 0xac, 0xa8, 0x46, 0xe0,
+ 0xff, 0x65, 0x81, 0x4c);
/**
* mei_amthif_reset_params - initializes mei device iamthif
@@ -64,22 +65,24 @@ void mei_amthif_reset_params(struct mei_device *dev)
* @dev: the device structure
*
*/
-void mei_amthif_host_init(struct mei_device *dev)
+int mei_amthif_host_init(struct mei_device *dev)
{
- int i;
+ struct mei_cl *cl = &dev->iamthif_cl;
unsigned char *msg_buf;
+ int ret, i;
+
+ dev->iamthif_state = MEI_IAMTHIF_IDLE;
- mei_cl_init(&dev->iamthif_cl, dev);
- dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
+ mei_cl_init(cl, dev);
- /* find ME amthi client */
- i = mei_me_cl_link(dev, &dev->iamthif_cl,
- &mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID);
+ i = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
if (i < 0) {
- dev_info(&dev->pdev->dev, "failed to find iamthif client.\n");
- return;
+ dev_info(&dev->pdev->dev, "amthif: failed to find the client\n");
+ return -ENOENT;
}
+ cl->me_client_id = dev->me_clients[i].client_id;
+
/* Assign iamthif_mtu to the value received from ME */
dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length;
@@ -93,19 +96,29 @@ void mei_amthif_host_init(struct mei_device *dev)
msg_buf = kcalloc(dev->iamthif_mtu,
sizeof(unsigned char), GFP_KERNEL);
if (!msg_buf) {
- dev_dbg(&dev->pdev->dev, "memory allocation for ME message buffer failed.\n");
- return;
+ dev_err(&dev->pdev->dev, "amthif: memory allocation for ME message buffer failed.\n");
+ return -ENOMEM;
}
dev->iamthif_msg_buf = msg_buf;
- if (mei_connect(dev, &dev->iamthif_cl)) {
- dev_dbg(&dev->pdev->dev, "Failed to connect to AMTHI client\n");
- dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
- dev->iamthif_cl.host_client_id = 0;
+ ret = mei_cl_link(cl, MEI_IAMTHIF_HOST_CLIENT_ID);
+
+ if (ret < 0) {
+ dev_err(&dev->pdev->dev, "amthif: failed link client\n");
+ return -ENOENT;
+ }
+
+ cl->state = MEI_FILE_CONNECTING;
+
+ if (mei_hbm_cl_connect_req(dev, cl)) {
+ dev_dbg(&dev->pdev->dev, "amthif: Failed to connect to ME client\n");
+ cl->state = MEI_FILE_DISCONNECTED;
+ cl->host_client_id = 0;
} else {
- dev->iamthif_cl.timer_count = MEI_CONNECT_TIMEOUT;
+ cl->timer_count = MEI_CONNECT_TIMEOUT;
}
+ return 0;
}
/**
@@ -168,10 +181,10 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
if (i < 0) {
- dev_dbg(&dev->pdev->dev, "amthi client not found.\n");
+ dev_dbg(&dev->pdev->dev, "amthif client not found.\n");
return -ENODEV;
}
- dev_dbg(&dev->pdev->dev, "checking amthi data\n");
+ dev_dbg(&dev->pdev->dev, "checking amthif data\n");
cb = mei_amthif_find_read_list_entry(dev, file);
/* Check for if we can block or not*/
@@ -179,7 +192,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
return -EAGAIN;
- dev_dbg(&dev->pdev->dev, "waiting for amthi data\n");
+ dev_dbg(&dev->pdev->dev, "waiting for amthif data\n");
while (cb == NULL) {
/* unlock the Mutex */
mutex_unlock(&dev->device_lock);
@@ -197,17 +210,17 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
}
- dev_dbg(&dev->pdev->dev, "Got amthi data\n");
+ dev_dbg(&dev->pdev->dev, "Got amthif data\n");
dev->iamthif_timer = 0;
if (cb) {
timeout = cb->read_time +
mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER);
- dev_dbg(&dev->pdev->dev, "amthi timeout = %lud\n",
+ dev_dbg(&dev->pdev->dev, "amthif timeout = %lud\n",
timeout);
if (time_after(jiffies, timeout)) {
- dev_dbg(&dev->pdev->dev, "amthi Time out\n");
+ dev_dbg(&dev->pdev->dev, "amthif Time out\n");
/* 15 sec for the message has expired */
list_del(&cb->list);
rets = -ETIMEDOUT;
@@ -227,9 +240,9 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
* remove message from deletion list
*/
- dev_dbg(&dev->pdev->dev, "amthi cb->response_buffer size - %d\n",
+ dev_dbg(&dev->pdev->dev, "amthif cb->response_buffer size - %d\n",
cb->response_buffer.size);
- dev_dbg(&dev->pdev->dev, "amthi cb->buf_idx - %lu\n", cb->buf_idx);
+ dev_dbg(&dev->pdev->dev, "amthif cb->buf_idx - %lu\n", cb->buf_idx);
/* length is being turncated to PAGE_SIZE, however,
* the buf_idx may point beyond */
@@ -245,7 +258,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
}
}
free:
- dev_dbg(&dev->pdev->dev, "free amthi cb memory.\n");
+ dev_dbg(&dev->pdev->dev, "free amthif cb memory.\n");
*offset = 0;
mei_io_cb_free(cb);
out:
@@ -269,7 +282,7 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
if (!dev || !cb)
return -ENODEV;
- dev_dbg(&dev->pdev->dev, "write data to amthi client.\n");
+ dev_dbg(&dev->pdev->dev, "write data to amthif client.\n");
dev->iamthif_state = MEI_IAMTHIF_WRITING;
dev->iamthif_current_cb = cb;
@@ -280,15 +293,15 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
memcpy(dev->iamthif_msg_buf, cb->request_buffer.data,
cb->request_buffer.size);
- ret = mei_flow_ctrl_creds(dev, &dev->iamthif_cl);
+ ret = mei_cl_flow_ctrl_creds(&dev->iamthif_cl);
if (ret < 0)
return ret;
- if (ret && dev->mei_host_buffer_is_empty) {
+ if (ret && dev->hbuf_is_ready) {
ret = 0;
- dev->mei_host_buffer_is_empty = false;
- if (cb->request_buffer.size > mei_hbuf_max_data(dev)) {
- mei_hdr.length = mei_hbuf_max_data(dev);
+ dev->hbuf_is_ready = false;
+ if (cb->request_buffer.size > mei_hbuf_max_len(dev)) {
+ mei_hdr.length = mei_hbuf_max_len(dev);
mei_hdr.msg_complete = 0;
} else {
mei_hdr.length = cb->request_buffer.size;
@@ -300,25 +313,24 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
mei_hdr.reserved = 0;
dev->iamthif_msg_buf_index += mei_hdr.length;
if (mei_write_message(dev, &mei_hdr,
- (unsigned char *)(dev->iamthif_msg_buf),
- mei_hdr.length))
+ (unsigned char *)dev->iamthif_msg_buf))
return -ENODEV;
if (mei_hdr.msg_complete) {
- if (mei_flow_ctrl_reduce(dev, &dev->iamthif_cl))
+ if (mei_cl_flow_ctrl_reduce(&dev->iamthif_cl))
return -ENODEV;
dev->iamthif_flow_control_pending = true;
dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
- dev_dbg(&dev->pdev->dev, "add amthi cb to write waiting list\n");
+ dev_dbg(&dev->pdev->dev, "add amthif cb to write waiting list\n");
dev->iamthif_current_cb = cb;
dev->iamthif_file_object = cb->file_object;
list_add_tail(&cb->list, &dev->write_waiting_list.list);
} else {
- dev_dbg(&dev->pdev->dev, "message does not complete, so add amthi cb to write list.\n");
+ dev_dbg(&dev->pdev->dev, "message does not complete, so add amthif cb to write list.\n");
list_add_tail(&cb->list, &dev->write_list.list);
}
} else {
- if (!(dev->mei_host_buffer_is_empty))
+ if (!dev->hbuf_is_ready)
dev_dbg(&dev->pdev->dev, "host buffer is not empty");
dev_dbg(&dev->pdev->dev, "No flow control credentials, so add iamthif cb to write list.\n");
@@ -383,7 +395,7 @@ void mei_amthif_run_next_cmd(struct mei_device *dev)
dev->iamthif_timer = 0;
dev->iamthif_file_object = NULL;
- dev_dbg(&dev->pdev->dev, "complete amthi cmd_list cb.\n");
+ dev_dbg(&dev->pdev->dev, "complete amthif cmd_list cb.\n");
list_for_each_entry_safe(pos, next, &dev->amthif_cmd_list.list, list) {
list_del(&pos->list);
@@ -392,7 +404,7 @@ void mei_amthif_run_next_cmd(struct mei_device *dev)
status = mei_amthif_send_cmd(dev, pos);
if (status) {
dev_dbg(&dev->pdev->dev,
- "amthi write failed status = %d\n",
+ "amthif write failed status = %d\n",
status);
return;
}
@@ -412,7 +424,7 @@ unsigned int mei_amthif_poll(struct mei_device *dev,
if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE &&
dev->iamthif_file_object == file) {
mask |= (POLLIN | POLLRDNORM);
- dev_dbg(&dev->pdev->dev, "run next amthi cb\n");
+ dev_dbg(&dev->pdev->dev, "run next amthif cb\n");
mei_amthif_run_next_cmd(dev);
}
return mask;
@@ -434,54 +446,51 @@ unsigned int mei_amthif_poll(struct mei_device *dev,
int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list)
{
- struct mei_msg_hdr *mei_hdr;
+ struct mei_msg_hdr mei_hdr;
struct mei_cl *cl = cb->cl;
size_t len = dev->iamthif_msg_buf_size - dev->iamthif_msg_buf_index;
size_t msg_slots = mei_data2slots(len);
- mei_hdr = (struct mei_msg_hdr *)&dev->wr_msg_buf[0];
- mei_hdr->host_addr = cl->host_client_id;
- mei_hdr->me_addr = cl->me_client_id;
- mei_hdr->reserved = 0;
+ mei_hdr.host_addr = cl->host_client_id;
+ mei_hdr.me_addr = cl->me_client_id;
+ mei_hdr.reserved = 0;
if (*slots >= msg_slots) {
- mei_hdr->length = len;
- mei_hdr->msg_complete = 1;
+ mei_hdr.length = len;
+ mei_hdr.msg_complete = 1;
/* Split the message only if we can write the whole host buffer */
} else if (*slots == dev->hbuf_depth) {
msg_slots = *slots;
len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
- mei_hdr->length = len;
- mei_hdr->msg_complete = 0;
+ mei_hdr.length = len;
+ mei_hdr.msg_complete = 0;
} else {
/* wait for next time the host buffer is empty */
return 0;
}
- dev_dbg(&dev->pdev->dev, "msg: len = %d complete = %d\n",
- mei_hdr->length, mei_hdr->msg_complete);
+ dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
*slots -= msg_slots;
- if (mei_write_message(dev, mei_hdr,
- dev->iamthif_msg_buf + dev->iamthif_msg_buf_index,
- mei_hdr->length)) {
+ if (mei_write_message(dev, &mei_hdr,
+ dev->iamthif_msg_buf + dev->iamthif_msg_buf_index)) {
dev->iamthif_state = MEI_IAMTHIF_IDLE;
cl->status = -ENODEV;
list_del(&cb->list);
return -ENODEV;
}
- if (mei_flow_ctrl_reduce(dev, cl))
+ if (mei_cl_flow_ctrl_reduce(cl))
return -ENODEV;
- dev->iamthif_msg_buf_index += mei_hdr->length;
+ dev->iamthif_msg_buf_index += mei_hdr.length;
cl->status = 0;
- if (mei_hdr->msg_complete) {
+ if (mei_hdr.msg_complete) {
dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
dev->iamthif_flow_control_pending = true;
- /* save iamthif cb sent to amthi client */
+ /* save iamthif cb sent to amthif client */
cb->buf_idx = dev->iamthif_msg_buf_index;
dev->iamthif_current_cb = cb;
@@ -494,11 +503,11 @@ int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
/**
* mei_amthif_irq_read_message - read routine after ISR to
- * handle the read amthi message
+ * handle the read amthif message
*
* @complete_list: An instance of our list structure
* @dev: the device structure
- * @mei_hdr: header of amthi message
+ * @mei_hdr: header of amthif message
*
* returns 0 on success, <0 on failure.
*/
@@ -522,10 +531,10 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
return 0;
dev_dbg(&dev->pdev->dev,
- "amthi_message_buffer_index =%d\n",
+ "amthif_message_buffer_index =%d\n",
mei_hdr->length);
- dev_dbg(&dev->pdev->dev, "completed amthi read.\n ");
+ dev_dbg(&dev->pdev->dev, "completed amthif read.\n ");
if (!dev->iamthif_current_cb)
return -ENODEV;
@@ -540,8 +549,8 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
cb->read_time = jiffies;
if (dev->iamthif_ioctl && cb->cl == &dev->iamthif_cl) {
/* found the iamthif cb */
- dev_dbg(&dev->pdev->dev, "complete the amthi read cb.\n ");
- dev_dbg(&dev->pdev->dev, "add the amthi read cb to complete.\n ");
+ dev_dbg(&dev->pdev->dev, "complete the amthif read cb.\n ");
+ dev_dbg(&dev->pdev->dev, "add the amthif read cb to complete.\n ");
list_add_tail(&cb->list, &complete_list->list);
}
return 0;
@@ -563,7 +572,7 @@ int mei_amthif_irq_read(struct mei_device *dev, s32 *slots)
return -EMSGSIZE;
}
*slots -= mei_data2slots(sizeof(struct hbm_flow_control));
- if (mei_send_flow_control(dev, &dev->iamthif_cl)) {
+ if (mei_hbm_cl_flow_control_req(dev, &dev->iamthif_cl)) {
dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
return -EIO;
}
@@ -574,7 +583,7 @@ int mei_amthif_irq_read(struct mei_device *dev, s32 *slots)
dev->iamthif_msg_buf_index = 0;
dev->iamthif_msg_buf_size = 0;
dev->iamthif_stall_timer = MEI_IAMTHIF_STALL_TIMER;
- dev->mei_host_buffer_is_empty = mei_hbuf_is_empty(dev);
+ dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
return 0;
}
@@ -593,7 +602,7 @@ void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
dev->iamthif_msg_buf,
dev->iamthif_msg_buf_index);
list_add_tail(&cb->list, &dev->amthif_rd_complete_list.list);
- dev_dbg(&dev->pdev->dev, "amthi read completed\n");
+ dev_dbg(&dev->pdev->dev, "amthif read completed\n");
dev->iamthif_timer = jiffies;
dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
dev->iamthif_timer);
@@ -601,7 +610,7 @@ void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
mei_amthif_run_next_cmd(dev);
}
- dev_dbg(&dev->pdev->dev, "completing amthi call back.\n");
+ dev_dbg(&dev->pdev->dev, "completing amthif call back.\n");
wake_up_interruptible(&dev->iamthif_cl.wait);
}
@@ -635,7 +644,8 @@ static bool mei_clear_list(struct mei_device *dev,
if (dev->iamthif_current_cb == cb_pos) {
dev->iamthif_current_cb = NULL;
/* send flow control to iamthif client */
- mei_send_flow_control(dev, &dev->iamthif_cl);
+ mei_hbm_cl_flow_control_req(dev,
+ &dev->iamthif_cl);
}
/* free all allocated buffers */
mei_io_cb_free(cb_pos);
@@ -706,11 +716,11 @@ int mei_amthif_release(struct mei_device *dev, struct file *file)
if (dev->iamthif_file_object == file &&
dev->iamthif_state != MEI_IAMTHIF_IDLE) {
- dev_dbg(&dev->pdev->dev, "amthi canceled iamthif state %d\n",
+ dev_dbg(&dev->pdev->dev, "amthif canceled iamthif state %d\n",
dev->iamthif_state);
dev->iamthif_canceled = true;
if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) {
- dev_dbg(&dev->pdev->dev, "run next amthi iamthif cb\n");
+ dev_dbg(&dev->pdev->dev, "run next amthif iamthif cb\n");
mei_amthif_run_next_cmd(dev);
}
}
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
new file mode 100644
index 00000000000..1569afe935d
--- /dev/null
+++ b/drivers/misc/mei/client.c
@@ -0,0 +1,729 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+
+#include <linux/mei.h>
+
+#include "mei_dev.h"
+#include "hbm.h"
+#include "client.h"
+
+/**
+ * mei_me_cl_by_uuid - locate index of me client
+ *
+ * @dev: mei device
+ * returns me client index or -ENOENT if not found
+ */
+int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid)
+{
+ int i, res = -ENOENT;
+
+ for (i = 0; i < dev->me_clients_num; ++i)
+ if (uuid_le_cmp(*uuid,
+ dev->me_clients[i].props.protocol_name) == 0) {
+ res = i;
+ break;
+ }
+
+ return res;
+}
+
+
+/**
+ * mei_me_cl_by_id return index to me_clients for client_id
+ *
+ * @dev: the device structure
+ * @client_id: me client id
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * returns index on success, -ENOENT on failure.
+ */
+
+int mei_me_cl_by_id(struct mei_device *dev, u8 client_id)
+{
+ int i;
+ for (i = 0; i < dev->me_clients_num; i++)
+ if (dev->me_clients[i].client_id == client_id)
+ break;
+ if (WARN_ON(dev->me_clients[i].client_id != client_id))
+ return -ENOENT;
+
+ if (i == dev->me_clients_num)
+ return -ENOENT;
+
+ return i;
+}
+
+
+/**
+ * mei_io_list_flush - removes list entry belonging to cl.
+ *
+ * @list: An instance of our list structure
+ * @cl: host client
+ */
+void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl)
+{
+ struct mei_cl_cb *cb;
+ struct mei_cl_cb *next;
+
+ list_for_each_entry_safe(cb, next, &list->list, list) {
+ if (cb->cl && mei_cl_cmp_id(cl, cb->cl))
+ list_del(&cb->list);
+ }
+}
+
+/**
+ * mei_io_cb_free - free mei_cb_private related memory
+ *
+ * @cb: mei callback struct
+ */
+void mei_io_cb_free(struct mei_cl_cb *cb)
+{
+ if (cb == NULL)
+ return;
+
+ kfree(cb->request_buffer.data);
+ kfree(cb->response_buffer.data);
+ kfree(cb);
+}
+
+/**
+ * mei_io_cb_init - allocate and initialize io callback
+ *
+ * @cl - mei client
+ * @file: pointer to file structure
+ *
+ * returns mei_cl_cb pointer or NULL;
+ */
+struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp)
+{
+ struct mei_cl_cb *cb;
+
+ cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL);
+ if (!cb)
+ return NULL;
+
+ mei_io_list_init(cb);
+
+ cb->file_object = fp;
+ cb->cl = cl;
+ cb->buf_idx = 0;
+ return cb;
+}
+
+/**
+ * mei_io_cb_alloc_req_buf - allocate request buffer
+ *
+ * @cb - io callback structure
+ * @size: size of the buffer
+ *
+ * returns 0 on success
+ * -EINVAL if cb is NULL
+ * -ENOMEM if allocation failed
+ */
+int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length)
+{
+ if (!cb)
+ return -EINVAL;
+
+ if (length == 0)
+ return 0;
+
+ cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!cb->request_buffer.data)
+ return -ENOMEM;
+ cb->request_buffer.size = length;
+ return 0;
+}
+/**
+ * mei_io_cb_alloc_req_buf - allocate respose buffer
+ *
+ * @cb - io callback structure
+ * @size: size of the buffer
+ *
+ * returns 0 on success
+ * -EINVAL if cb is NULL
+ * -ENOMEM if allocation failed
+ */
+int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length)
+{
+ if (!cb)
+ return -EINVAL;
+
+ if (length == 0)
+ return 0;
+
+ cb->response_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!cb->response_buffer.data)
+ return -ENOMEM;
+ cb->response_buffer.size = length;
+ return 0;
+}
+
+
+
+/**
+ * mei_cl_flush_queues - flushes queue lists belonging to cl.
+ *
+ * @dev: the device structure
+ * @cl: host client
+ */
+int mei_cl_flush_queues(struct mei_cl *cl)
+{
+ if (WARN_ON(!cl || !cl->dev))
+ return -EINVAL;
+
+ dev_dbg(&cl->dev->pdev->dev, "remove list entry belonging to cl\n");
+ mei_io_list_flush(&cl->dev->read_list, cl);
+ mei_io_list_flush(&cl->dev->write_list, cl);
+ mei_io_list_flush(&cl->dev->write_waiting_list, cl);
+ mei_io_list_flush(&cl->dev->ctrl_wr_list, cl);
+ mei_io_list_flush(&cl->dev->ctrl_rd_list, cl);
+ mei_io_list_flush(&cl->dev->amthif_cmd_list, cl);
+ mei_io_list_flush(&cl->dev->amthif_rd_complete_list, cl);
+ return 0;
+}
+
+
+/**
+ * mei_cl_init - initializes intialize cl.
+ *
+ * @cl: host client to be initialized
+ * @dev: mei device
+ */
+void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
+{
+ memset(cl, 0, sizeof(struct mei_cl));
+ init_waitqueue_head(&cl->wait);
+ init_waitqueue_head(&cl->rx_wait);
+ init_waitqueue_head(&cl->tx_wait);
+ INIT_LIST_HEAD(&cl->link);
+ cl->reading_state = MEI_IDLE;
+ cl->writing_state = MEI_IDLE;
+ cl->dev = dev;
+}
+
+/**
+ * mei_cl_allocate - allocates cl structure and sets it up.
+ *
+ * @dev: mei device
+ * returns The allocated file or NULL on failure
+ */
+struct mei_cl *mei_cl_allocate(struct mei_device *dev)
+{
+ struct mei_cl *cl;
+
+ cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL);
+ if (!cl)
+ return NULL;
+
+ mei_cl_init(cl, dev);
+
+ return cl;
+}
+
+/**
+ * mei_cl_find_read_cb - find this cl's callback in the read list
+ *
+ * @dev: device structure
+ * returns cb on success, NULL on error
+ */
+struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl)
+{
+ struct mei_device *dev = cl->dev;
+ struct mei_cl_cb *cb = NULL;
+ struct mei_cl_cb *next = NULL;
+
+ list_for_each_entry_safe(cb, next, &dev->read_list.list, list)
+ if (mei_cl_cmp_id(cl, cb->cl))
+ return cb;
+ return NULL;
+}
+
+/** mei_cl_link: allocte host id in the host map
+ *
+ * @cl - host client
+ * @id - fixed host id or -1 for genereting one
+ * returns 0 on success
+ * -EINVAL on incorrect values
+ * -ENONET if client not found
+ */
+int mei_cl_link(struct mei_cl *cl, int id)
+{
+ struct mei_device *dev;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -EINVAL;
+
+ dev = cl->dev;
+
+ /* If Id is not asigned get one*/
+ if (id == MEI_HOST_CLIENT_ID_ANY)
+ id = find_first_zero_bit(dev->host_clients_map,
+ MEI_CLIENTS_MAX);
+
+ if (id >= MEI_CLIENTS_MAX) {
+ dev_err(&dev->pdev->dev, "id exceded %d", MEI_CLIENTS_MAX) ;
+ return -ENOENT;
+ }
+
+ dev->open_handle_count++;
+
+ cl->host_client_id = id;
+ list_add_tail(&cl->link, &dev->file_list);
+
+ set_bit(id, dev->host_clients_map);
+
+ cl->state = MEI_FILE_INITIALIZING;
+
+ dev_dbg(&dev->pdev->dev, "link cl host id = %d\n", cl->host_client_id);
+ return 0;
+}
+
+/**
+ * mei_cl_unlink - remove me_cl from the list
+ *
+ * @dev: the device structure
+ */
+int mei_cl_unlink(struct mei_cl *cl)
+{
+ struct mei_device *dev;
+ struct mei_cl *pos, *next;
+
+ /* don't shout on error exit path */
+ if (!cl)
+ return 0;
+
+ /* wd and amthif might not be initialized */
+ if (!cl->dev)
+ return 0;
+
+ dev = cl->dev;
+
+ list_for_each_entry_safe(pos, next, &dev->file_list, link) {
+ if (cl->host_client_id == pos->host_client_id) {
+ dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n",
+ pos->host_client_id, pos->me_client_id);
+ list_del_init(&pos->link);
+ break;
+ }
+ }
+ return 0;
+}
+
+
+void mei_host_client_init(struct work_struct *work)
+{
+ struct mei_device *dev = container_of(work,
+ struct mei_device, init_work);
+ struct mei_client_properties *client_props;
+ int i;
+
+ mutex_lock(&dev->device_lock);
+
+ bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
+ dev->open_handle_count = 0;
+
+ /*
+ * Reserving the first three client IDs
+ * 0: Reserved for MEI Bus Message communications
+ * 1: Reserved for Watchdog
+ * 2: Reserved for AMTHI
+ */
+ bitmap_set(dev->host_clients_map, 0, 3);
+
+ for (i = 0; i < dev->me_clients_num; i++) {
+ client_props = &dev->me_clients[i].props;
+
+ if (!uuid_le_cmp(client_props->protocol_name, mei_amthif_guid))
+ mei_amthif_host_init(dev);
+ else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid))
+ mei_wd_host_init(dev);
+ }
+
+ dev->dev_state = MEI_DEV_ENABLED;
+
+ mutex_unlock(&dev->device_lock);
+}
+
+
+/**
+ * mei_cl_disconnect - disconnect host clinet form the me one
+ *
+ * @cl: host client
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int mei_cl_disconnect(struct mei_cl *cl)
+{
+ struct mei_device *dev;
+ struct mei_cl_cb *cb;
+ int rets, err;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ if (cl->state != MEI_FILE_DISCONNECTING)
+ return 0;
+
+ cb = mei_io_cb_init(cl, NULL);
+ if (!cb)
+ return -ENOMEM;
+
+ cb->fop_type = MEI_FOP_CLOSE;
+ if (dev->hbuf_is_ready) {
+ dev->hbuf_is_ready = false;
+ if (mei_hbm_cl_disconnect_req(dev, cl)) {
+ rets = -ENODEV;
+ dev_err(&dev->pdev->dev, "failed to disconnect.\n");
+ goto free;
+ }
+ mdelay(10); /* Wait for hardware disconnection ready */
+ list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
+ } else {
+ dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n");
+ list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
+
+ }
+ mutex_unlock(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ MEI_FILE_DISCONNECTED == cl->state,
+ mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+
+ mutex_lock(&dev->device_lock);
+ if (MEI_FILE_DISCONNECTED == cl->state) {
+ rets = 0;
+ dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n");
+ } else {
+ rets = -ENODEV;
+ if (MEI_FILE_DISCONNECTED != cl->state)
+ dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n");
+
+ if (err)
+ dev_dbg(&dev->pdev->dev,
+ "wait failed disconnect err=%08x\n",
+ err);
+
+ dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n");
+ }
+
+ mei_io_list_flush(&dev->ctrl_rd_list, cl);
+ mei_io_list_flush(&dev->ctrl_wr_list, cl);
+free:
+ mei_io_cb_free(cb);
+ return rets;
+}
+
+
+/**
+ * mei_cl_is_other_connecting - checks if other
+ * client with the same me client id is connecting
+ *
+ * @cl: private data of the file object
+ *
+ * returns ture if other client is connected, 0 - otherwise.
+ */
+bool mei_cl_is_other_connecting(struct mei_cl *cl)
+{
+ struct mei_device *dev;
+ struct mei_cl *pos;
+ struct mei_cl *next;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return false;
+
+ dev = cl->dev;
+
+ list_for_each_entry_safe(pos, next, &dev->file_list, link) {
+ if ((pos->state == MEI_FILE_CONNECTING) &&
+ (pos != cl) && cl->me_client_id == pos->me_client_id)
+ return true;
+
+ }
+
+ return false;
+}
+
+/**
+ * mei_cl_connect - connect host clinet to the me one
+ *
+ * @cl: host client
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int mei_cl_connect(struct mei_cl *cl, struct file *file)
+{
+ struct mei_device *dev;
+ struct mei_cl_cb *cb;
+ long timeout = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT);
+ int rets;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ cb = mei_io_cb_init(cl, file);
+ if (!cb) {
+ rets = -ENOMEM;
+ goto out;
+ }
+
+ cb->fop_type = MEI_FOP_IOCTL;
+
+ if (dev->hbuf_is_ready && !mei_cl_is_other_connecting(cl)) {
+ dev->hbuf_is_ready = false;
+
+ if (mei_hbm_cl_connect_req(dev, cl)) {
+ rets = -ENODEV;
+ goto out;
+ }
+ cl->timer_count = MEI_CONNECT_TIMEOUT;
+ list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
+ } else {
+ list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
+ }
+
+ mutex_unlock(&dev->device_lock);
+ rets = wait_event_timeout(dev->wait_recvd_msg,
+ (cl->state == MEI_FILE_CONNECTED ||
+ cl->state == MEI_FILE_DISCONNECTED),
+ timeout * HZ);
+ mutex_lock(&dev->device_lock);
+
+ if (cl->state != MEI_FILE_CONNECTED) {
+ rets = -EFAULT;
+
+ mei_io_list_flush(&dev->ctrl_rd_list, cl);
+ mei_io_list_flush(&dev->ctrl_wr_list, cl);
+ goto out;
+ }
+
+ rets = cl->status;
+
+out:
+ mei_io_cb_free(cb);
+ return rets;
+}
+
+/**
+ * mei_cl_flow_ctrl_creds - checks flow_control credits for cl.
+ *
+ * @dev: the device structure
+ * @cl: private data of the file object
+ *
+ * returns 1 if mei_flow_ctrl_creds >0, 0 - otherwise.
+ * -ENOENT if mei_cl is not present
+ * -EINVAL if single_recv_buf == 0
+ */
+int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
+{
+ struct mei_device *dev;
+ int i;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -EINVAL;
+
+ dev = cl->dev;
+
+ if (!dev->me_clients_num)
+ return 0;
+
+ if (cl->mei_flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->me_clients_num; i++) {
+ struct mei_me_client *me_cl = &dev->me_clients[i];
+ if (me_cl->client_id == cl->me_client_id) {
+ if (me_cl->mei_flow_ctrl_creds) {
+ if (WARN_ON(me_cl->props.single_recv_buf == 0))
+ return -EINVAL;
+ return 1;
+ } else {
+ return 0;
+ }
+ }
+ }
+ return -ENOENT;
+}
+
+/**
+ * mei_cl_flow_ctrl_reduce - reduces flow_control.
+ *
+ * @dev: the device structure
+ * @cl: private data of the file object
+ * @returns
+ * 0 on success
+ * -ENOENT when me client is not found
+ * -EINVAL when ctrl credits are <= 0
+ */
+int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
+{
+ struct mei_device *dev;
+ int i;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -EINVAL;
+
+ dev = cl->dev;
+
+ if (!dev->me_clients_num)
+ return -ENOENT;
+
+ for (i = 0; i < dev->me_clients_num; i++) {
+ struct mei_me_client *me_cl = &dev->me_clients[i];
+ if (me_cl->client_id == cl->me_client_id) {
+ if (me_cl->props.single_recv_buf != 0) {
+ if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))
+ return -EINVAL;
+ dev->me_clients[i].mei_flow_ctrl_creds--;
+ } else {
+ if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))
+ return -EINVAL;
+ cl->mei_flow_ctrl_creds--;
+ }
+ return 0;
+ }
+ }
+ return -ENOENT;
+}
+
+/**
+ * mei_cl_start_read - the start read client message function.
+ *
+ * @cl: host client
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int mei_cl_read_start(struct mei_cl *cl)
+{
+ struct mei_device *dev;
+ struct mei_cl_cb *cb;
+ int rets;
+ int i;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ if (cl->state != MEI_FILE_CONNECTED)
+ return -ENODEV;
+
+ if (dev->dev_state != MEI_DEV_ENABLED)
+ return -ENODEV;
+
+ if (cl->read_cb) {
+ dev_dbg(&dev->pdev->dev, "read is pending.\n");
+ return -EBUSY;
+ }
+ i = mei_me_cl_by_id(dev, cl->me_client_id);
+ if (i < 0) {
+ dev_err(&dev->pdev->dev, "no such me client %d\n",
+ cl->me_client_id);
+ return -ENODEV;
+ }
+
+ cb = mei_io_cb_init(cl, NULL);
+ if (!cb)
+ return -ENOMEM;
+
+ rets = mei_io_cb_alloc_resp_buf(cb,
+ dev->me_clients[i].props.max_msg_length);
+ if (rets)
+ goto err;
+
+ cb->fop_type = MEI_FOP_READ;
+ cl->read_cb = cb;
+ if (dev->hbuf_is_ready) {
+ dev->hbuf_is_ready = false;
+ if (mei_hbm_cl_flow_control_req(dev, cl)) {
+ rets = -ENODEV;
+ goto err;
+ }
+ list_add_tail(&cb->list, &dev->read_list.list);
+ } else {
+ list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
+ }
+ return rets;
+err:
+ mei_io_cb_free(cb);
+ return rets;
+}
+
+/**
+ * mei_cl_all_disconnect - disconnect forcefully all connected clients
+ *
+ * @dev - mei device
+ */
+
+void mei_cl_all_disconnect(struct mei_device *dev)
+{
+ struct mei_cl *cl, *next;
+
+ list_for_each_entry_safe(cl, next, &dev->file_list, link) {
+ cl->state = MEI_FILE_DISCONNECTED;
+ cl->mei_flow_ctrl_creds = 0;
+ cl->read_cb = NULL;
+ cl->timer_count = 0;
+ }
+}
+
+
+/**
+ * mei_cl_all_read_wakeup - wake up all readings so they can be interrupted
+ *
+ * @dev - mei device
+ */
+void mei_cl_all_read_wakeup(struct mei_device *dev)
+{
+ struct mei_cl *cl, *next;
+ list_for_each_entry_safe(cl, next, &dev->file_list, link) {
+ if (waitqueue_active(&cl->rx_wait)) {
+ dev_dbg(&dev->pdev->dev, "Waking up client!\n");
+ wake_up_interruptible(&cl->rx_wait);
+ }
+ }
+}
+
+/**
+ * mei_cl_all_write_clear - clear all pending writes
+
+ * @dev - mei device
+ */
+void mei_cl_all_write_clear(struct mei_device *dev)
+{
+ struct mei_cl_cb *cb, *next;
+
+ list_for_each_entry_safe(cb, next, &dev->write_list.list, list) {
+ list_del(&cb->list);
+ mei_io_cb_free(cb);
+ }
+}
+
+
diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
new file mode 100644
index 00000000000..214b2397ec3
--- /dev/null
+++ b/drivers/misc/mei/client.h
@@ -0,0 +1,102 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#ifndef _MEI_CLIENT_H_
+#define _MEI_CLIENT_H_
+
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <linux/poll.h>
+#include <linux/mei.h>
+
+#include "mei_dev.h"
+
+int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid);
+int mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
+
+/*
+ * MEI IO Functions
+ */
+struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp);
+void mei_io_cb_free(struct mei_cl_cb *priv_cb);
+int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length);
+int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length);
+
+
+/**
+ * mei_io_list_init - Sets up a queue list.
+ *
+ * @list: An instance cl callback structure
+ */
+static inline void mei_io_list_init(struct mei_cl_cb *list)
+{
+ INIT_LIST_HEAD(&list->list);
+}
+void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl);
+
+/*
+ * MEI Host Client Functions
+ */
+
+struct mei_cl *mei_cl_allocate(struct mei_device *dev);
+void mei_cl_init(struct mei_cl *cl, struct mei_device *dev);
+
+
+int mei_cl_link(struct mei_cl *cl, int id);
+int mei_cl_unlink(struct mei_cl *cl);
+
+int mei_cl_flush_queues(struct mei_cl *cl);
+struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl);
+
+/**
+ * mei_cl_cmp_id - tells if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * returns true - if ids are the same and not NULL
+ */
+static inline bool mei_cl_cmp_id(const struct mei_cl *cl1,
+ const struct mei_cl *cl2)
+{
+ return cl1 && cl2 &&
+ (cl1->host_client_id == cl2->host_client_id) &&
+ (cl1->me_client_id == cl2->me_client_id);
+}
+
+
+int mei_cl_flow_ctrl_creds(struct mei_cl *cl);
+
+int mei_cl_flow_ctrl_reduce(struct mei_cl *cl);
+/*
+ * MEI input output function prototype
+ */
+bool mei_cl_is_other_connecting(struct mei_cl *cl);
+int mei_cl_disconnect(struct mei_cl *cl);
+
+int mei_cl_read_start(struct mei_cl *cl);
+
+int mei_cl_connect(struct mei_cl *cl, struct file *file);
+
+void mei_host_client_init(struct work_struct *work);
+
+
+void mei_cl_all_disconnect(struct mei_device *dev);
+void mei_cl_all_read_wakeup(struct mei_device *dev);
+void mei_cl_all_write_clear(struct mei_device *dev);
+
+
+#endif /* _MEI_CLIENT_H_ */
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
new file mode 100644
index 00000000000..fb9e63ba3bb
--- /dev/null
+++ b/drivers/misc/mei/hbm.c
@@ -0,0 +1,669 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/mei.h>
+
+#include "mei_dev.h"
+#include "hbm.h"
+#include "hw-me.h"
+
+/**
+ * mei_hbm_me_cl_allocate - allocates storage for me clients
+ *
+ * @dev: the device structure
+ *
+ * returns none.
+ */
+static void mei_hbm_me_cl_allocate(struct mei_device *dev)
+{
+ struct mei_me_client *clients;
+ int b;
+
+ /* count how many ME clients we have */
+ for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX)
+ dev->me_clients_num++;
+
+ if (dev->me_clients_num <= 0)
+ return;
+
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+
+ dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n",
+ dev->me_clients_num * sizeof(struct mei_me_client));
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->me_clients_num,
+ sizeof(struct mei_me_client), GFP_KERNEL);
+ if (!clients) {
+ dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
+ dev->dev_state = MEI_DEV_RESETING;
+ mei_reset(dev, 1);
+ return;
+ }
+ dev->me_clients = clients;
+ return;
+}
+
+/**
+ * mei_hbm_cl_hdr - construct client hbm header
+ * @cl: - client
+ * @hbm_cmd: host bus message command
+ * @buf: buffer for cl header
+ * @len: buffer length
+ */
+static inline
+void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
+{
+ struct mei_hbm_cl_cmd *cmd = buf;
+
+ memset(cmd, 0, len);
+
+ cmd->hbm_cmd = hbm_cmd;
+ cmd->host_addr = cl->host_client_id;
+ cmd->me_addr = cl->me_client_id;
+}
+
+/**
+ * same_disconn_addr - tells if they have the same address
+ *
+ * @file: private data of the file object.
+ * @disconn: disconnection request.
+ *
+ * returns true if addres are same
+ */
+static inline
+bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf)
+{
+ struct mei_hbm_cl_cmd *cmd = buf;
+ return cl->host_client_id == cmd->host_addr &&
+ cl->me_client_id == cmd->me_addr;
+}
+
+
+/**
+ * is_treat_specially_client - checks if the message belongs
+ * to the file private data.
+ *
+ * @cl: private data of the file object
+ * @rs: connect response bus message
+ *
+ */
+static bool is_treat_specially_client(struct mei_cl *cl,
+ struct hbm_client_connect_response *rs)
+{
+ if (mei_hbm_cl_addr_equal(cl, rs)) {
+ if (!rs->status) {
+ cl->state = MEI_FILE_CONNECTED;
+ cl->status = 0;
+
+ } else {
+ cl->state = MEI_FILE_DISCONNECTED;
+ cl->status = -ENODEV;
+ }
+ cl->timer_count = 0;
+
+ return true;
+ }
+ return false;
+}
+
+/**
+ * mei_hbm_start_req - sends start request message.
+ *
+ * @dev: the device structure
+ */
+void mei_hbm_start_req(struct mei_device *dev)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ struct hbm_host_version_request *start_req;
+ const size_t len = sizeof(struct hbm_host_version_request);
+
+ mei_hbm_hdr(mei_hdr, len);
+
+ /* host start message */
+ start_req = (struct hbm_host_version_request *)dev->wr_msg.data;
+ memset(start_req, 0, len);
+ start_req->hbm_cmd = HOST_START_REQ_CMD;
+ start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ start_req->host_version.minor_version = HBM_MINOR_VERSION;
+
+ dev->recvd_msg = false;
+ if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
+ dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
+ dev->dev_state = MEI_DEV_RESETING;
+ mei_reset(dev, 1);
+ }
+ dev->init_clients_state = MEI_START_MESSAGE;
+ dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ return ;
+}
+
+/**
+ * mei_hbm_enum_clients_req - sends enumeration client request message.
+ *
+ * @dev: the device structure
+ *
+ * returns none.
+ */
+static void mei_hbm_enum_clients_req(struct mei_device *dev)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ struct hbm_host_enum_request *enum_req;
+ const size_t len = sizeof(struct hbm_host_enum_request);
+ /* enumerate clients */
+ mei_hbm_hdr(mei_hdr, len);
+
+ enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;
+ memset(enum_req, 0, len);
+ enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
+
+ if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
+ dev->dev_state = MEI_DEV_RESETING;
+ dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
+ mei_reset(dev, 1);
+ }
+ dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE;
+ dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ return;
+}
+
+/**
+ * mei_hbm_prop_requsest - request property for a single client
+ *
+ * @dev: the device structure
+ *
+ * returns none.
+ */
+
+static int mei_hbm_prop_req(struct mei_device *dev)
+{
+
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ struct hbm_props_request *prop_req;
+ const size_t len = sizeof(struct hbm_props_request);
+ unsigned long next_client_index;
+ u8 client_num;
+
+
+ client_num = dev->me_client_presentation_num;
+
+ next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
+ dev->me_client_index);
+
+ /* We got all client properties */
+ if (next_client_index == MEI_CLIENTS_MAX) {
+ schedule_work(&dev->init_work);
+
+ return 0;
+ }
+
+ dev->me_clients[client_num].client_id = next_client_index;
+ dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
+
+ mei_hbm_hdr(mei_hdr, len);
+ prop_req = (struct hbm_props_request *)dev->wr_msg.data;
+
+ memset(prop_req, 0, sizeof(struct hbm_props_request));
+
+
+ prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
+ prop_req->address = next_client_index;
+
+ if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
+ dev->dev_state = MEI_DEV_RESETING;
+ dev_err(&dev->pdev->dev, "Properties request command failed\n");
+ mei_reset(dev, 1);
+
+ return -EIO;
+ }
+
+ dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ dev->me_client_index = next_client_index;
+
+ return 0;
+}
+
+/**
+ * mei_hbm_stop_req_prepare - perpare stop request message
+ *
+ * @dev - mei device
+ * @mei_hdr - mei message header
+ * @data - hbm message body buffer
+ */
+static void mei_hbm_stop_req_prepare(struct mei_device *dev,
+ struct mei_msg_hdr *mei_hdr, unsigned char *data)
+{
+ struct hbm_host_stop_request *req =
+ (struct hbm_host_stop_request *)data;
+ const size_t len = sizeof(struct hbm_host_stop_request);
+
+ mei_hbm_hdr(mei_hdr, len);
+
+ memset(req, 0, len);
+ req->hbm_cmd = HOST_STOP_REQ_CMD;
+ req->reason = DRIVER_STOP_REQUEST;
+}
+
+/**
+ * mei_hbm_cl_flow_control_req - sends flow control requst.
+ *
+ * @dev: the device structure
+ * @cl: client info
+ *
+ * This function returns -EIO on write failure
+ */
+int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ const size_t len = sizeof(struct hbm_flow_control);
+
+ mei_hbm_hdr(mei_hdr, len);
+ mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len);
+
+ dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
+ cl->host_client_id, cl->me_client_id);
+
+ return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+}
+
+/**
+ * add_single_flow_creds - adds single buffer credentials.
+ *
+ * @file: private data ot the file object.
+ * @flow: flow control.
+ */
+static void mei_hbm_add_single_flow_creds(struct mei_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct mei_me_client *client;
+ int i;
+
+ for (i = 0; i < dev->me_clients_num; i++) {
+ client = &dev->me_clients[i];
+ if (client && flow->me_addr == client->client_id) {
+ if (client->props.single_recv_buf) {
+ client->mei_flow_ctrl_creds++;
+ dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
+ client->mei_flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
+ }
+ }
+ }
+}
+
+/**
+ * mei_hbm_cl_flow_control_res - flow control response from me
+ *
+ * @dev: the device structure
+ * @flow_control: flow control response bus message
+ */
+static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct mei_cl *cl = NULL;
+ struct mei_cl *next = NULL;
+
+ if (!flow_control->host_addr) {
+ /* single receive buffer */
+ mei_hbm_add_single_flow_creds(dev, flow_control);
+ return;
+ }
+
+ /* normal connection */
+ list_for_each_entry_safe(cl, next, &dev->file_list, link) {
+ if (mei_hbm_cl_addr_equal(cl, flow_control)) {
+ cl->mei_flow_ctrl_creds++;
+ dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr, flow_control->me_addr);
+ dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
+ cl->mei_flow_ctrl_creds);
+ break;
+ }
+ }
+}
+
+
+/**
+ * mei_hbm_cl_disconnect_req - sends disconnect message to fw.
+ *
+ * @dev: the device structure
+ * @cl: a client to disconnect from
+ *
+ * This function returns -EIO on write failure
+ */
+int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ const size_t len = sizeof(struct hbm_client_connect_request);
+
+ mei_hbm_hdr(mei_hdr, len);
+ mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len);
+
+ return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+}
+
+/**
+ * mei_hbm_cl_disconnect_res - disconnect response from ME
+ *
+ * @dev: the device structure
+ * @rs: disconnect response bus message
+ */
+static void mei_hbm_cl_disconnect_res(struct mei_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct mei_cl *cl;
+ struct mei_cl_cb *pos = NULL, *next = NULL;
+
+ dev_dbg(&dev->pdev->dev,
+ "disconnect_response:\n"
+ "ME Client = %d\n"
+ "Host Client = %d\n"
+ "Status = %d\n",
+ rs->me_addr,
+ rs->host_addr,
+ rs->status);
+
+ list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
+ cl = pos->cl;
+
+ if (!cl) {
+ list_del(&pos->list);
+ return;
+ }
+
+ dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
+ if (mei_hbm_cl_addr_equal(cl, rs)) {
+ list_del(&pos->list);
+ if (!rs->status)
+ cl->state = MEI_FILE_DISCONNECTED;
+
+ cl->status = 0;
+ cl->timer_count = 0;
+ break;
+ }
+ }
+}
+
+/**
+ * mei_hbm_cl_connect_req - send connection request to specific me client
+ *
+ * @dev: the device structure
+ * @cl: a client to connect to
+ *
+ * returns -EIO on write failure
+ */
+int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ const size_t len = sizeof(struct hbm_client_connect_request);
+
+ mei_hbm_hdr(mei_hdr, len);
+ mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len);
+
+ return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+}
+
+/**
+ * mei_hbm_cl_connect_res - connect resposne from the ME
+ *
+ * @dev: the device structure
+ * @rs: connect response bus message
+ */
+static void mei_hbm_cl_connect_res(struct mei_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct mei_cl *cl;
+ struct mei_cl_cb *pos = NULL, *next = NULL;
+
+ dev_dbg(&dev->pdev->dev,
+ "connect_response:\n"
+ "ME Client = %d\n"
+ "Host Client = %d\n"
+ "Status = %d\n",
+ rs->me_addr,
+ rs->host_addr,
+ rs->status);
+
+ /* if WD or iamthif client treat specially */
+
+ if (is_treat_specially_client(&dev->wd_cl, rs)) {
+ dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
+ mei_watchdog_register(dev);
+
+ return;
+ }
+
+ if (is_treat_specially_client(&dev->iamthif_cl, rs)) {
+ dev->iamthif_state = MEI_IAMTHIF_IDLE;
+ return;
+ }
+ list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
+
+ cl = pos->cl;
+ if (!cl) {
+ list_del(&pos->list);
+ return;
+ }
+ if (pos->fop_type == MEI_FOP_IOCTL) {
+ if (is_treat_specially_client(cl, rs)) {
+ list_del(&pos->list);
+ cl->status = 0;
+ cl->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+
+/**
+ * mei_client_disconnect_request - disconnect request initiated by me
+ * host sends disoconnect response
+ *
+ * @dev: the device structure.
+ * @disconnect_req: disconnect request bus message from the me
+ */
+static void mei_hbm_fw_disconnect_req(struct mei_device *dev,
+ struct hbm_client_connect_request *disconnect_req)
+{
+ struct mei_cl *cl, *next;
+ const size_t len = sizeof(struct hbm_client_connect_response);
+
+ list_for_each_entry_safe(cl, next, &dev->file_list, link) {
+ if (mei_hbm_cl_addr_equal(cl, disconnect_req)) {
+ dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ cl->state = MEI_FILE_DISCONNECTED;
+ cl->timer_count = 0;
+ if (cl == &dev->wd_cl)
+ dev->wd_pending = false;
+ else if (cl == &dev->iamthif_cl)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ mei_hbm_hdr(&dev->wr_ext_msg.hdr, len);
+ mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD,
+ dev->wr_ext_msg.data, len);
+ break;
+ }
+ }
+}
+
+
+/**
+ * mei_hbm_dispatch - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @dev: the device structure
+ * @mei_hdr: header of bus message
+ */
+void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
+{
+ struct mei_bus_message *mei_msg;
+ struct mei_me_client *me_client;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_client_connect_request *disconnect_req;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+
+ /* read the message to our buffer */
+ BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
+ mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
+ mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
+
+ switch (mei_msg->hbm_cmd) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *)mei_msg;
+ if (!version_res->host_version_supported) {
+ dev->version = version_res->me_max_version;
+ dev_dbg(&dev->pdev->dev, "version mismatch.\n");
+
+ mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr,
+ dev->wr_msg.data);
+ mei_write_message(dev, &dev->wr_msg.hdr,
+ dev->wr_msg.data);
+ return;
+ }
+
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
+ dev->init_clients_state == MEI_START_MESSAGE) {
+ dev->init_clients_timer = 0;
+ mei_hbm_enum_clients_req(dev);
+ } else {
+ dev->recvd_msg = false;
+ dev_dbg(&dev->pdev->dev, "reset due to received hbm: host start\n");
+ mei_reset(dev, 1);
+ return;
+ }
+
+ dev->recvd_msg = true;
+ dev_dbg(&dev->pdev->dev, "host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res = (struct hbm_client_connect_response *) mei_msg;
+ mei_hbm_cl_connect_res(dev, connect_res);
+ dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res = (struct hbm_client_connect_response *) mei_msg;
+ mei_hbm_cl_disconnect_res(dev, disconnect_res);
+ dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case MEI_FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) mei_msg;
+ mei_hbm_cl_flow_control_res(dev, flow_control);
+ dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
+ break;
+
+ case HOST_CLIENT_PROPERTIES_RES_CMD:
+ props_res = (struct hbm_props_response *)mei_msg;
+ me_client = &dev->me_clients[dev->me_client_presentation_num];
+
+ if (props_res->status || !dev->me_clients) {
+ dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n");
+ mei_reset(dev, 1);
+ return;
+ }
+
+ if (me_client->client_id != props_res->address) {
+ dev_err(&dev->pdev->dev,
+ "Host client properties reply mismatch\n");
+ mei_reset(dev, 1);
+
+ return;
+ }
+
+ if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
+ dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) {
+ dev_err(&dev->pdev->dev,
+ "Unexpected client properties reply\n");
+ mei_reset(dev, 1);
+
+ return;
+ }
+
+ me_client->props = props_res->client_properties;
+ dev->me_client_index++;
+ dev->me_client_presentation_num++;
+
+ /* request property for the next client */
+ mei_hbm_prop_req(dev);
+
+ break;
+
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) mei_msg;
+ memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
+ if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
+ dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) {
+ dev->init_clients_timer = 0;
+ dev->me_client_presentation_num = 0;
+ dev->me_client_index = 0;
+ mei_hbm_me_cl_allocate(dev);
+ dev->init_clients_state =
+ MEI_CLIENT_PROPERTIES_MESSAGE;
+
+ /* first property reqeust */
+ mei_hbm_prop_req(dev);
+ } else {
+ dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n");
+ mei_reset(dev, 1);
+ return;
+ }
+ break;
+
+ case HOST_STOP_RES_CMD:
+ dev->dev_state = MEI_DEV_DISABLED;
+ dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n");
+ mei_reset(dev, 1);
+ break;
+
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req = (struct hbm_client_connect_request *)mei_msg;
+ mei_hbm_fw_disconnect_req(dev, disconnect_req);
+ break;
+
+ case ME_STOP_REQ_CMD:
+
+ mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr,
+ dev->wr_ext_msg.data);
+ break;
+ default:
+ BUG();
+ break;
+
+ }
+}
+
diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h
new file mode 100644
index 00000000000..b552afbaf85
--- /dev/null
+++ b/drivers/misc/mei/hbm.h
@@ -0,0 +1,39 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#ifndef _MEI_HBM_H_
+#define _MEI_HBM_H_
+
+void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
+
+static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length)
+{
+ hdr->host_addr = 0;
+ hdr->me_addr = 0;
+ hdr->length = length;
+ hdr->msg_complete = 1;
+ hdr->reserved = 0;
+}
+
+void mei_hbm_start_req(struct mei_device *dev);
+
+int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl);
+int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl);
+int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
+
+
+#endif /* _MEI_HBM_H_ */
+
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
new file mode 100644
index 00000000000..6a203b6e834
--- /dev/null
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -0,0 +1,167 @@
+/******************************************************************************
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Intel MEI Interface Header
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ * Intel Corporation.
+ * linux-mei@linux.intel.com
+ * http://www.intel.com
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#ifndef _MEI_HW_MEI_REGS_H_
+#define _MEI_HW_MEI_REGS_H_
+
+/*
+ * MEI device IDs
+ */
+#define MEI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
+#define MEI_DEV_ID_82G35 0x2984 /* 82G35 Express */
+#define MEI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
+#define MEI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
+
+#define MEI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
+#define MEI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
+
+#define MEI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
+#define MEI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
+#define MEI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
+#define MEI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
+#define MEI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
+
+#define MEI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
+#define MEI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
+#define MEI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
+#define MEI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
+#define MEI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
+
+#define MEI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
+#define MEI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
+#define MEI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
+#define MEI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
+
+#define MEI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
+#define MEI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
+#define MEI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
+#define MEI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
+
+#define MEI_DEV_ID_IBXPK_1 0x3B64 /* Calpella */
+#define MEI_DEV_ID_IBXPK_2 0x3B65 /* Calpella */
+
+#define MEI_DEV_ID_CPT_1 0x1C3A /* Couger Point */
+#define MEI_DEV_ID_PBG_1 0x1D3A /* C600/X79 Patsburg */
+
+#define MEI_DEV_ID_PPT_1 0x1E3A /* Panther Point */
+#define MEI_DEV_ID_PPT_2 0x1CBA /* Panther Point */
+#define MEI_DEV_ID_PPT_3 0x1DBA /* Panther Point */
+
+#define MEI_DEV_ID_LPT 0x8C3A /* Lynx Point */
+#define MEI_DEV_ID_LPT_LP 0x9C3A /* Lynx Point LP */
+/*
+ * MEI HW Section
+ */
+
+/* MEI registers */
+/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
+#define H_CB_WW 0
+/* H_CSR - Host Control Status register */
+#define H_CSR 4
+/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
+#define ME_CB_RW 8
+/* ME_CSR_HA - ME Control Status Host Access register (read only) */
+#define ME_CSR_HA 0xC
+
+
+/* register bits of H_CSR (Host Control Status register) */
+/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
+#define H_CBD 0xFF000000
+/* Host Circular Buffer Write Pointer */
+#define H_CBWP 0x00FF0000
+/* Host Circular Buffer Read Pointer */
+#define H_CBRP 0x0000FF00
+/* Host Reset */
+#define H_RST 0x00000010
+/* Host Ready */
+#define H_RDY 0x00000008
+/* Host Interrupt Generate */
+#define H_IG 0x00000004
+/* Host Interrupt Status */
+#define H_IS 0x00000002
+/* Host Interrupt Enable */
+#define H_IE 0x00000001
+
+
+/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
+/* ME CB (Circular Buffer) Depth HRA (Host Read Access) - host read only
+access to ME_CBD */
+#define ME_CBD_HRA 0xFF000000
+/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
+#define ME_CBWP_HRA 0x00FF0000
+/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
+#define ME_CBRP_HRA 0x0000FF00
+/* ME Reset HRA - host read only access to ME_RST */
+#define ME_RST_HRA 0x00000010
+/* ME Ready HRA - host read only access to ME_RDY */
+#define ME_RDY_HRA 0x00000008
+/* ME Interrupt Generate HRA - host read only access to ME_IG */
+#define ME_IG_HRA 0x00000004
+/* ME Interrupt Status HRA - host read only access to ME_IS */
+#define ME_IS_HRA 0x00000002
+/* ME Interrupt Enable HRA - host read only access to ME_IE */
+#define ME_IE_HRA 0x00000001
+
+#endif /* _MEI_HW_MEI_REGS_H_ */
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
new file mode 100644
index 00000000000..45ea7185c00
--- /dev/null
+++ b/drivers/misc/mei/hw-me.c
@@ -0,0 +1,576 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/pci.h>
+
+#include <linux/kthread.h>
+#include <linux/interrupt.h>
+
+#include "mei_dev.h"
+#include "hw-me.h"
+
+#include "hbm.h"
+
+
+/**
+ * mei_reg_read - Reads 32bit data from the mei device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns register value (u32)
+ */
+static inline u32 mei_reg_read(const struct mei_me_hw *hw,
+ unsigned long offset)
+{
+ return ioread32(hw->mem_addr + offset);
+}
+
+
+/**
+ * mei_reg_write - Writes 32bit data to the mei device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to write the data
+ * @value: register value to write (u32)
+ */
+static inline void mei_reg_write(const struct mei_me_hw *hw,
+ unsigned long offset, u32 value)
+{
+ iowrite32(value, hw->mem_addr + offset);
+}
+
+/**
+ * mei_mecbrw_read - Reads 32bit data from ME circular buffer
+ * read window register
+ *
+ * @dev: the device structure
+ *
+ * returns ME_CB_RW register value (u32)
+ */
+static u32 mei_me_mecbrw_read(const struct mei_device *dev)
+{
+ return mei_reg_read(to_me_hw(dev), ME_CB_RW);
+}
+/**
+ * mei_mecsr_read - Reads 32bit data from the ME CSR
+ *
+ * @dev: the device structure
+ *
+ * returns ME_CSR_HA register value (u32)
+ */
+static inline u32 mei_mecsr_read(const struct mei_me_hw *hw)
+{
+ return mei_reg_read(hw, ME_CSR_HA);
+}
+
+/**
+ * mei_hcsr_read - Reads 32bit data from the host CSR
+ *
+ * @dev: the device structure
+ *
+ * returns H_CSR register value (u32)
+ */
+static inline u32 mei_hcsr_read(const struct mei_me_hw *hw)
+{
+ return mei_reg_read(hw, H_CSR);
+}
+
+/**
+ * mei_hcsr_set - writes H_CSR register to the mei device,
+ * and ignores the H_IS bit for it is write-one-to-zero.
+ *
+ * @dev: the device structure
+ */
+static inline void mei_hcsr_set(struct mei_me_hw *hw, u32 hcsr)
+{
+ hcsr &= ~H_IS;
+ mei_reg_write(hw, H_CSR, hcsr);
+}
+
+
+/**
+ * me_hw_config - configure hw dependent settings
+ *
+ * @dev: mei device
+ */
+static void mei_me_hw_config(struct mei_device *dev)
+{
+ u32 hcsr = mei_hcsr_read(to_me_hw(dev));
+ /* Doesn't change in runtime */
+ dev->hbuf_depth = (hcsr & H_CBD) >> 24;
+}
+/**
+ * mei_clear_interrupts - clear and stop interrupts
+ *
+ * @dev: the device structure
+ */
+static void mei_me_intr_clear(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 hcsr = mei_hcsr_read(hw);
+ if ((hcsr & H_IS) == H_IS)
+ mei_reg_write(hw, H_CSR, hcsr);
+}
+/**
+ * mei_me_intr_enable - enables mei device interrupts
+ *
+ * @dev: the device structure
+ */
+static void mei_me_intr_enable(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 hcsr = mei_hcsr_read(hw);
+ hcsr |= H_IE;
+ mei_hcsr_set(hw, hcsr);
+}
+
+/**
+ * mei_disable_interrupts - disables mei device interrupts
+ *
+ * @dev: the device structure
+ */
+static void mei_me_intr_disable(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 hcsr = mei_hcsr_read(hw);
+ hcsr &= ~H_IE;
+ mei_hcsr_set(hw, hcsr);
+}
+
+/**
+ * mei_me_hw_reset - resets fw via mei csr register.
+ *
+ * @dev: the device structure
+ * @interrupts_enabled: if interrupt should be enabled after reset.
+ */
+static void mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 hcsr = mei_hcsr_read(hw);
+
+ dev_dbg(&dev->pdev->dev, "before reset HCSR = 0x%08x.\n", hcsr);
+
+ hcsr |= (H_RST | H_IG);
+
+ if (intr_enable)
+ hcsr |= H_IE;
+ else
+ hcsr &= ~H_IE;
+
+ mei_hcsr_set(hw, hcsr);
+
+ hcsr = mei_hcsr_read(hw) | H_IG;
+ hcsr &= ~H_RST;
+
+ mei_hcsr_set(hw, hcsr);
+
+ hcsr = mei_hcsr_read(hw);
+
+ dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", hcsr);
+}
+
+/**
+ * mei_me_host_set_ready - enable device
+ *
+ * @dev - mei device
+ * returns bool
+ */
+
+static void mei_me_host_set_ready(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ hw->host_hw_state |= H_IE | H_IG | H_RDY;
+ mei_hcsr_set(hw, hw->host_hw_state);
+}
+/**
+ * mei_me_host_is_ready - check whether the host has turned ready
+ *
+ * @dev - mei device
+ * returns bool
+ */
+static bool mei_me_host_is_ready(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ hw->host_hw_state = mei_hcsr_read(hw);
+ return (hw->host_hw_state & H_RDY) == H_RDY;
+}
+
+/**
+ * mei_me_hw_is_ready - check whether the me(hw) has turned ready
+ *
+ * @dev - mei device
+ * returns bool
+ */
+static bool mei_me_hw_is_ready(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ hw->me_hw_state = mei_mecsr_read(hw);
+ return (hw->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA;
+}
+
+/**
+ * mei_hbuf_filled_slots - gets number of device filled buffer slots
+ *
+ * @dev: the device structure
+ *
+ * returns number of filled slots
+ */
+static unsigned char mei_hbuf_filled_slots(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ char read_ptr, write_ptr;
+
+ hw->host_hw_state = mei_hcsr_read(hw);
+
+ read_ptr = (char) ((hw->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((hw->host_hw_state & H_CBWP) >> 16);
+
+ return (unsigned char) (write_ptr - read_ptr);
+}
+
+/**
+ * mei_hbuf_is_empty - checks if host buffer is empty.
+ *
+ * @dev: the device structure
+ *
+ * returns true if empty, false - otherwise.
+ */
+static bool mei_me_hbuf_is_empty(struct mei_device *dev)
+{
+ return mei_hbuf_filled_slots(dev) == 0;
+}
+
+/**
+ * mei_me_hbuf_empty_slots - counts write empty slots.
+ *
+ * @dev: the device structure
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ */
+static int mei_me_hbuf_empty_slots(struct mei_device *dev)
+{
+ unsigned char filled_slots, empty_slots;
+
+ filled_slots = mei_hbuf_filled_slots(dev);
+ empty_slots = dev->hbuf_depth - filled_slots;
+
+ /* check for overflow */
+ if (filled_slots > dev->hbuf_depth)
+ return -EOVERFLOW;
+
+ return empty_slots;
+}
+
+static size_t mei_me_hbuf_max_len(const struct mei_device *dev)
+{
+ return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr);
+}
+
+
+/**
+ * mei_write_message - writes a message to mei device.
+ *
+ * @dev: the device structure
+ * @header: mei HECI header of message
+ * @buf: message payload will be written
+ *
+ * This function returns -EIO if write has failed
+ */
+static int mei_me_write_message(struct mei_device *dev,
+ struct mei_msg_hdr *header,
+ unsigned char *buf)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ unsigned long rem, dw_cnt;
+ unsigned long length = header->length;
+ u32 *reg_buf = (u32 *)buf;
+ u32 hcsr;
+ int i;
+ int empty_slots;
+
+ dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(header));
+
+ empty_slots = mei_hbuf_empty_slots(dev);
+ dev_dbg(&dev->pdev->dev, "empty slots = %hu.\n", empty_slots);
+
+ dw_cnt = mei_data2slots(length);
+ if (empty_slots < 0 || dw_cnt > empty_slots)
+ return -EIO;
+
+ mei_reg_write(hw, H_CB_WW, *((u32 *) header));
+
+ for (i = 0; i < length / 4; i++)
+ mei_reg_write(hw, H_CB_WW, reg_buf[i]);
+
+ rem = length & 0x3;
+ if (rem > 0) {
+ u32 reg = 0;
+ memcpy(&reg, &buf[length - rem], rem);
+ mei_reg_write(hw, H_CB_WW, reg);
+ }
+
+ hcsr = mei_hcsr_read(hw) | H_IG;
+ mei_hcsr_set(hw, hcsr);
+ if (!mei_me_hw_is_ready(dev))
+ return -EIO;
+
+ return 0;
+}
+
+/**
+ * mei_me_count_full_read_slots - counts read full slots.
+ *
+ * @dev: the device structure
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ */
+static int mei_me_count_full_read_slots(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots;
+
+ hw->me_hw_state = mei_mecsr_read(hw);
+ buffer_depth = (unsigned char)((hw->me_hw_state & ME_CBD_HRA) >> 24);
+ read_ptr = (char) ((hw->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((hw->me_hw_state & ME_CBWP_HRA) >> 16);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+
+ /* check for overflow */
+ if (filled_slots > buffer_depth)
+ return -EOVERFLOW;
+
+ dev_dbg(&dev->pdev->dev, "filled_slots =%08x\n", filled_slots);
+ return (int)filled_slots;
+}
+
+/**
+ * mei_me_read_slots - reads a message from mei device.
+ *
+ * @dev: the device structure
+ * @buffer: message buffer will be written
+ * @buffer_length: message size will be read
+ */
+static int mei_me_read_slots(struct mei_device *dev, unsigned char *buffer,
+ unsigned long buffer_length)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 *reg_buf = (u32 *)buffer;
+ u32 hcsr;
+
+ for (; buffer_length >= sizeof(u32); buffer_length -= sizeof(u32))
+ *reg_buf++ = mei_me_mecbrw_read(dev);
+
+ if (buffer_length > 0) {
+ u32 reg = mei_me_mecbrw_read(dev);
+ memcpy(reg_buf, &reg, buffer_length);
+ }
+
+ hcsr = mei_hcsr_read(hw) | H_IG;
+ mei_hcsr_set(hw, hcsr);
+ return 0;
+}
+
+/**
+ * mei_me_irq_quick_handler - The ISR of the MEI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ */
+
+irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id)
+{
+ struct mei_device *dev = (struct mei_device *) dev_id;
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 csr_reg = mei_hcsr_read(hw);
+
+ if ((csr_reg & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* clear H_IS bit in H_CSR */
+ mei_reg_write(hw, H_CSR, csr_reg);
+
+ return IRQ_WAKE_THREAD;
+}
+
+/**
+ * mei_me_irq_thread_handler - function called after ISR to handle the interrupt
+ * processing.
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ *
+ */
+irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
+{
+ struct mei_device *dev = (struct mei_device *) dev_id;
+ struct mei_cl_cb complete_list;
+ struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
+ struct mei_cl *cl;
+ s32 slots;
+ int rets;
+ bool bus_message_received;
+
+
+ dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ mutex_lock(&dev->device_lock);
+ mei_io_list_init(&complete_list);
+
+ /* Ack the interrupt here
+ * In case of MSI we don't go through the quick handler */
+ if (pci_dev_msi_enabled(dev->pdev))
+ mei_clear_interrupts(dev);
+
+ /* check if ME wants a reset */
+ if (!mei_hw_is_ready(dev) &&
+ dev->dev_state != MEI_DEV_RESETING &&
+ dev->dev_state != MEI_DEV_INITIALIZING) {
+ dev_dbg(&dev->pdev->dev, "FW not ready.\n");
+ mei_reset(dev, 1);
+ mutex_unlock(&dev->device_lock);
+ return IRQ_HANDLED;
+ }
+
+ /* check if we need to start the dev */
+ if (!mei_host_is_ready(dev)) {
+ if (mei_hw_is_ready(dev)) {
+ dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
+
+ mei_host_set_ready(dev);
+
+ dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
+ /* link is established * start sending messages. */
+
+ dev->dev_state = MEI_DEV_INIT_CLIENTS;
+
+ mei_hbm_start_req(dev);
+ mutex_unlock(&dev->device_lock);
+ return IRQ_HANDLED;
+ } else {
+ dev_dbg(&dev->pdev->dev, "FW not ready.\n");
+ mutex_unlock(&dev->device_lock);
+ return IRQ_HANDLED;
+ }
+ }
+ /* check slots available for reading */
+ slots = mei_count_full_read_slots(dev);
+ while (slots > 0) {
+ /* we have urgent data to send so break the read */
+ if (dev->wr_ext_msg.hdr.length)
+ break;
+ dev_dbg(&dev->pdev->dev, "slots =%08x\n", slots);
+ dev_dbg(&dev->pdev->dev, "call mei_irq_read_handler.\n");
+ rets = mei_irq_read_handler(dev, &complete_list, &slots);
+ if (rets)
+ goto end;
+ }
+ rets = mei_irq_write_handler(dev, &complete_list);
+end:
+ dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
+ dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
+
+ bus_message_received = false;
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ dev_dbg(&dev->pdev->dev, "received waiting bus message\n");
+ bus_message_received = true;
+ }
+ mutex_unlock(&dev->device_lock);
+ if (bus_message_received) {
+ dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = false;
+ }
+ if (list_empty(&complete_list.list))
+ return IRQ_HANDLED;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next, &complete_list.list, list) {
+ cl = cb_pos->cl;
+ list_del(&cb_pos->list);
+ if (cl) {
+ if (cl != &dev->iamthif_cl) {
+ dev_dbg(&dev->pdev->dev, "completing call back.\n");
+ mei_irq_complete_handler(cl, cb_pos);
+ cb_pos = NULL;
+ } else if (cl == &dev->iamthif_cl) {
+ mei_amthif_complete(dev, cb_pos);
+ }
+ }
+ }
+ return IRQ_HANDLED;
+}
+static const struct mei_hw_ops mei_me_hw_ops = {
+
+ .host_set_ready = mei_me_host_set_ready,
+ .host_is_ready = mei_me_host_is_ready,
+
+ .hw_is_ready = mei_me_hw_is_ready,
+ .hw_reset = mei_me_hw_reset,
+ .hw_config = mei_me_hw_config,
+
+ .intr_clear = mei_me_intr_clear,
+ .intr_enable = mei_me_intr_enable,
+ .intr_disable = mei_me_intr_disable,
+
+ .hbuf_free_slots = mei_me_hbuf_empty_slots,
+ .hbuf_is_ready = mei_me_hbuf_is_empty,
+ .hbuf_max_len = mei_me_hbuf_max_len,
+
+ .write = mei_me_write_message,
+
+ .rdbuf_full_slots = mei_me_count_full_read_slots,
+ .read_hdr = mei_me_mecbrw_read,
+ .read = mei_me_read_slots
+};
+
+/**
+ * init_mei_device - allocates and initializes the mei device structure
+ *
+ * @pdev: The pci device structure
+ *
+ * returns The mei_device_device pointer on success, NULL on failure.
+ */
+struct mei_device *mei_me_dev_init(struct pci_dev *pdev)
+{
+ struct mei_device *dev;
+
+ dev = kzalloc(sizeof(struct mei_device) +
+ sizeof(struct mei_me_hw), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ mei_device_init(dev);
+
+ INIT_LIST_HEAD(&dev->wd_cl.link);
+ INIT_LIST_HEAD(&dev->iamthif_cl.link);
+ mei_io_list_init(&dev->amthif_cmd_list);
+ mei_io_list_init(&dev->amthif_rd_complete_list);
+
+ INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
+ INIT_WORK(&dev->init_work, mei_host_client_init);
+
+ dev->ops = &mei_me_hw_ops;
+
+ dev->pdev = pdev;
+ return dev;
+}
+
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
new file mode 100644
index 00000000000..8518d3eeb83
--- /dev/null
+++ b/drivers/misc/mei/hw-me.h
@@ -0,0 +1,48 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+
+
+#ifndef _MEI_INTERFACE_H_
+#define _MEI_INTERFACE_H_
+
+#include <linux/mei.h>
+#include "mei_dev.h"
+#include "client.h"
+
+struct mei_me_hw {
+ void __iomem *mem_addr;
+ /*
+ * hw states of host and fw(ME)
+ */
+ u32 host_hw_state;
+ u32 me_hw_state;
+};
+
+#define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw)
+
+struct mei_device *mei_me_dev_init(struct pci_dev *pdev);
+
+/* get slots (dwords) from a message length + header (bytes) */
+static inline unsigned char mei_data2slots(size_t length)
+{
+ return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
+}
+
+irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id);
+irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id);
+
+#endif /* _MEI_INTERFACE_H_ */
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index be8ca6b333c..cb2f556b425 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -31,109 +31,6 @@
#define MEI_IAMTHIF_STALL_TIMER 12 /* HPS */
#define MEI_IAMTHIF_READ_TIMER 10 /* HPS */
-/*
- * Internal Clients Number
- */
-#define MEI_WD_HOST_CLIENT_ID 1
-#define MEI_IAMTHIF_HOST_CLIENT_ID 2
-
-/*
- * MEI device IDs
- */
-#define MEI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
-#define MEI_DEV_ID_82G35 0x2984 /* 82G35 Express */
-#define MEI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
-#define MEI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
-
-#define MEI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
-#define MEI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
-
-#define MEI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
-#define MEI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
-#define MEI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
-#define MEI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
-#define MEI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
-
-#define MEI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
-#define MEI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
-#define MEI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
-#define MEI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
-#define MEI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
-
-#define MEI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
-#define MEI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
-#define MEI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
-#define MEI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
-
-#define MEI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
-#define MEI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
-#define MEI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
-#define MEI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
-
-#define MEI_DEV_ID_IBXPK_1 0x3B64 /* Calpella */
-#define MEI_DEV_ID_IBXPK_2 0x3B65 /* Calpella */
-
-#define MEI_DEV_ID_CPT_1 0x1C3A /* Couger Point */
-#define MEI_DEV_ID_PBG_1 0x1D3A /* C600/X79 Patsburg */
-
-#define MEI_DEV_ID_PPT_1 0x1E3A /* Panther Point */
-#define MEI_DEV_ID_PPT_2 0x1CBA /* Panther Point */
-#define MEI_DEV_ID_PPT_3 0x1DBA /* Panther Point */
-
-#define MEI_DEV_ID_LPT 0x8C3A /* Lynx Point */
-#define MEI_DEV_ID_LPT_LP 0x9C3A /* Lynx Point LP */
-/*
- * MEI HW Section
- */
-
-/* MEI registers */
-/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
-#define H_CB_WW 0
-/* H_CSR - Host Control Status register */
-#define H_CSR 4
-/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
-#define ME_CB_RW 8
-/* ME_CSR_HA - ME Control Status Host Access register (read only) */
-#define ME_CSR_HA 0xC
-
-
-/* register bits of H_CSR (Host Control Status register) */
-/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
-#define H_CBD 0xFF000000
-/* Host Circular Buffer Write Pointer */
-#define H_CBWP 0x00FF0000
-/* Host Circular Buffer Read Pointer */
-#define H_CBRP 0x0000FF00
-/* Host Reset */
-#define H_RST 0x00000010
-/* Host Ready */
-#define H_RDY 0x00000008
-/* Host Interrupt Generate */
-#define H_IG 0x00000004
-/* Host Interrupt Status */
-#define H_IS 0x00000002
-/* Host Interrupt Enable */
-#define H_IE 0x00000001
-
-
-/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
-/* ME CB (Circular Buffer) Depth HRA (Host Read Access) - host read only
-access to ME_CBD */
-#define ME_CBD_HRA 0xFF000000
-/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
-#define ME_CBWP_HRA 0x00FF0000
-/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
-#define ME_CBRP_HRA 0x0000FF00
-/* ME Reset HRA - host read only access to ME_RST */
-#define ME_RST_HRA 0x00000010
-/* ME Ready HRA - host read only access to ME_RDY */
-#define ME_RDY_HRA 0x00000008
-/* ME Interrupt Generate HRA - host read only access to ME_IG */
-#define ME_IG_HRA 0x00000004
-/* ME Interrupt Status HRA - host read only access to ME_IS */
-#define ME_IS_HRA 0x00000002
-/* ME Interrupt Enable HRA - host read only access to ME_IE */
-#define ME_IE_HRA 0x00000001
/*
* MEI Version
@@ -224,6 +121,22 @@ struct mei_bus_message {
u8 data[0];
} __packed;
+/**
+ * struct hbm_cl_cmd - client specific host bus command
+ * CONNECT, DISCONNECT, and FlOW CONTROL
+ *
+ * @hbm_cmd - bus message command header
+ * @me_addr - address of the client in ME
+ * @host_addr - address of the client in the driver
+ * @data
+ */
+struct mei_hbm_cl_cmd {
+ u8 hbm_cmd;
+ u8 me_addr;
+ u8 host_addr;
+ u8 data;
+};
+
struct hbm_version {
u8 minor_version;
u8 major_version;
@@ -333,11 +246,5 @@ struct hbm_flow_control {
u8 reserved[MEI_FC_MESSAGE_RESERVED_LENGTH];
} __packed;
-struct mei_me_client {
- struct mei_client_properties props;
- u8 client_id;
- u8 mei_flow_ctrl_creds;
-} __packed;
-
#endif
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index a54cd5567ca..6ec530168af 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -19,11 +19,11 @@
#include <linux/wait.h>
#include <linux/delay.h>
-#include "mei_dev.h"
-#include "hw.h"
-#include "interface.h"
#include <linux/mei.h>
+#include "mei_dev.h"
+#include "client.h"
+
const char *mei_dev_state_str(int state)
{
#define MEI_DEV_STATE(state) case MEI_DEV_##state: return #state
@@ -42,84 +42,20 @@ const char *mei_dev_state_str(int state)
#undef MEI_DEV_STATE
}
-
-
-/**
- * mei_io_list_flush - removes list entry belonging to cl.
- *
- * @list: An instance of our list structure
- * @cl: private data of the file object
- */
-void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl)
-{
- struct mei_cl_cb *pos;
- struct mei_cl_cb *next;
-
- list_for_each_entry_safe(pos, next, &list->list, list) {
- if (pos->cl) {
- if (mei_cl_cmp_id(cl, pos->cl))
- list_del(&pos->list);
- }
- }
-}
-/**
- * mei_cl_flush_queues - flushes queue lists belonging to cl.
- *
- * @dev: the device structure
- * @cl: private data of the file object
- */
-int mei_cl_flush_queues(struct mei_cl *cl)
+void mei_device_init(struct mei_device *dev)
{
- if (!cl || !cl->dev)
- return -EINVAL;
-
- dev_dbg(&cl->dev->pdev->dev, "remove list entry belonging to cl\n");
- mei_io_list_flush(&cl->dev->read_list, cl);
- mei_io_list_flush(&cl->dev->write_list, cl);
- mei_io_list_flush(&cl->dev->write_waiting_list, cl);
- mei_io_list_flush(&cl->dev->ctrl_wr_list, cl);
- mei_io_list_flush(&cl->dev->ctrl_rd_list, cl);
- mei_io_list_flush(&cl->dev->amthif_cmd_list, cl);
- mei_io_list_flush(&cl->dev->amthif_rd_complete_list, cl);
- return 0;
-}
-
-
-
-/**
- * init_mei_device - allocates and initializes the mei device structure
- *
- * @pdev: The pci device structure
- *
- * returns The mei_device_device pointer on success, NULL on failure.
- */
-struct mei_device *mei_device_init(struct pci_dev *pdev)
-{
- struct mei_device *dev;
-
- dev = kzalloc(sizeof(struct mei_device), GFP_KERNEL);
- if (!dev)
- return NULL;
-
/* setup our list array */
INIT_LIST_HEAD(&dev->file_list);
- INIT_LIST_HEAD(&dev->wd_cl.link);
- INIT_LIST_HEAD(&dev->iamthif_cl.link);
mutex_init(&dev->device_lock);
init_waitqueue_head(&dev->wait_recvd_msg);
init_waitqueue_head(&dev->wait_stop_wd);
dev->dev_state = MEI_DEV_INITIALIZING;
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
mei_io_list_init(&dev->read_list);
mei_io_list_init(&dev->write_list);
mei_io_list_init(&dev->write_waiting_list);
mei_io_list_init(&dev->ctrl_wr_list);
mei_io_list_init(&dev->ctrl_rd_list);
- mei_io_list_init(&dev->amthif_cmd_list);
- mei_io_list_init(&dev->amthif_rd_complete_list);
- dev->pdev = pdev;
- return dev;
}
/**
@@ -131,101 +67,64 @@ struct mei_device *mei_device_init(struct pci_dev *pdev)
*/
int mei_hw_init(struct mei_device *dev)
{
- int err = 0;
- int ret;
+ int ret = 0;
mutex_lock(&dev->device_lock);
- dev->host_hw_state = mei_hcsr_read(dev);
- dev->me_hw_state = mei_mecsr_read(dev);
- dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, mestate = 0x%08x.\n",
- dev->host_hw_state, dev->me_hw_state);
-
/* acknowledge interrupt and stop interupts */
- if ((dev->host_hw_state & H_IS) == H_IS)
- mei_reg_write(dev, H_CSR, dev->host_hw_state);
+ mei_clear_interrupts(dev);
- /* Doesn't change in runtime */
- dev->hbuf_depth = (dev->host_hw_state & H_CBD) >> 24;
+ mei_hw_config(dev);
dev->recvd_msg = false;
dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n");
mei_reset(dev, 1);
- dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
- dev->host_hw_state, dev->me_hw_state);
-
/* wait for ME to turn on ME_RDY */
if (!dev->recvd_msg) {
mutex_unlock(&dev->device_lock);
- err = wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ ret = wait_event_interruptible_timeout(dev->wait_recvd_msg,
dev->recvd_msg,
mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT));
mutex_lock(&dev->device_lock);
}
- if (err <= 0 && !dev->recvd_msg) {
+ if (ret <= 0 && !dev->recvd_msg) {
dev->dev_state = MEI_DEV_DISABLED;
dev_dbg(&dev->pdev->dev,
"wait_event_interruptible_timeout failed"
"on wait for ME to turn on ME_RDY.\n");
- ret = -ENODEV;
- goto out;
+ goto err;
}
- if (!(((dev->host_hw_state & H_RDY) == H_RDY) &&
- ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
- dev->dev_state = MEI_DEV_DISABLED;
- dev_dbg(&dev->pdev->dev,
- "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
- dev->host_hw_state, dev->me_hw_state);
-
- if (!(dev->host_hw_state & H_RDY))
- dev_dbg(&dev->pdev->dev, "host turn off H_RDY.\n");
- if (!(dev->me_hw_state & ME_RDY_HRA))
- dev_dbg(&dev->pdev->dev, "ME turn off ME_RDY.\n");
+ if (!mei_host_is_ready(dev)) {
+ dev_err(&dev->pdev->dev, "host is not ready.\n");
+ goto err;
+ }
- dev_err(&dev->pdev->dev, "link layer initialization failed.\n");
- ret = -ENODEV;
- goto out;
+ if (!mei_hw_is_ready(dev)) {
+ dev_err(&dev->pdev->dev, "ME is not ready.\n");
+ goto err;
}
if (dev->version.major_version != HBM_MAJOR_VERSION ||
dev->version.minor_version != HBM_MINOR_VERSION) {
dev_dbg(&dev->pdev->dev, "MEI start failed.\n");
- ret = -ENODEV;
- goto out;
+ goto err;
}
dev->recvd_msg = false;
- dev_dbg(&dev->pdev->dev, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
- dev->host_hw_state, dev->me_hw_state);
- dev_dbg(&dev->pdev->dev, "ME turn on ME_RDY and host turn on H_RDY.\n");
dev_dbg(&dev->pdev->dev, "link layer has been established.\n");
- dev_dbg(&dev->pdev->dev, "MEI start success.\n");
- ret = 0;
-out:
mutex_unlock(&dev->device_lock);
- return ret;
-}
-
-/**
- * mei_hw_reset - resets fw via mei csr register.
- *
- * @dev: the device structure
- * @interrupts_enabled: if interrupt should be enabled after reset.
- */
-static void mei_hw_reset(struct mei_device *dev, int interrupts_enabled)
-{
- dev->host_hw_state |= (H_RST | H_IG);
-
- if (interrupts_enabled)
- mei_enable_interrupts(dev);
- else
- mei_disable_interrupts(dev);
+ return 0;
+err:
+ dev_err(&dev->pdev->dev, "link layer initialization failed.\n");
+ dev->dev_state = MEI_DEV_DISABLED;
+ mutex_unlock(&dev->device_lock);
+ return -ENODEV;
}
/**
@@ -236,56 +135,34 @@ static void mei_hw_reset(struct mei_device *dev, int interrupts_enabled)
*/
void mei_reset(struct mei_device *dev, int interrupts_enabled)
{
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
- struct mei_cl_cb *cb_pos = NULL;
- struct mei_cl_cb *cb_next = NULL;
bool unexpected;
- if (dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) {
- dev->need_reset = true;
+ if (dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET)
return;
- }
unexpected = (dev->dev_state != MEI_DEV_INITIALIZING &&
dev->dev_state != MEI_DEV_DISABLED &&
dev->dev_state != MEI_DEV_POWER_DOWN &&
dev->dev_state != MEI_DEV_POWER_UP);
- dev->host_hw_state = mei_hcsr_read(dev);
-
- dev_dbg(&dev->pdev->dev, "before reset host_hw_state = 0x%08x.\n",
- dev->host_hw_state);
-
mei_hw_reset(dev, interrupts_enabled);
- dev->host_hw_state &= ~H_RST;
- dev->host_hw_state |= H_IG;
-
- mei_hcsr_set(dev);
-
- dev_dbg(&dev->pdev->dev, "currently saved host_hw_state = 0x%08x.\n",
- dev->host_hw_state);
-
- dev->need_reset = false;
if (dev->dev_state != MEI_DEV_INITIALIZING) {
if (dev->dev_state != MEI_DEV_DISABLED &&
dev->dev_state != MEI_DEV_POWER_DOWN)
dev->dev_state = MEI_DEV_RESETING;
- list_for_each_entry_safe(cl_pos,
- cl_next, &dev->file_list, link) {
- cl_pos->state = MEI_FILE_DISCONNECTED;
- cl_pos->mei_flow_ctrl_creds = 0;
- cl_pos->read_cb = NULL;
- cl_pos->timer_count = 0;
- }
+ mei_cl_all_disconnect(dev);
+
/* remove entry if already in list */
dev_dbg(&dev->pdev->dev, "remove iamthif and wd from the file list.\n");
- mei_me_cl_unlink(dev, &dev->wd_cl);
-
- mei_me_cl_unlink(dev, &dev->iamthif_cl);
+ mei_cl_unlink(&dev->wd_cl);
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+ mei_cl_unlink(&dev->iamthif_cl);
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
mei_amthif_reset_params(dev);
memset(&dev->wr_ext_msg, 0, sizeof(dev->wr_ext_msg));
@@ -295,392 +172,17 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
dev->rd_msg_hdr = 0;
dev->wd_pending = false;
- /* update the state of the registers after reset */
- dev->host_hw_state = mei_hcsr_read(dev);
- dev->me_hw_state = mei_mecsr_read(dev);
-
- dev_dbg(&dev->pdev->dev, "after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
- dev->host_hw_state, dev->me_hw_state);
-
if (unexpected)
dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n",
mei_dev_state_str(dev->dev_state));
- /* Wake up all readings so they can be interrupted */
- list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
- if (waitqueue_active(&cl_pos->rx_wait)) {
- dev_dbg(&dev->pdev->dev, "Waking up client!\n");
- wake_up_interruptible(&cl_pos->rx_wait);
- }
- }
- /* remove all waiting requests */
- list_for_each_entry_safe(cb_pos, cb_next, &dev->write_list.list, list) {
- list_del(&cb_pos->list);
- mei_io_cb_free(cb_pos);
- }
-}
-
-
-
-/**
- * host_start_message - mei host sends start message.
- *
- * @dev: the device structure
- *
- * returns none.
- */
-void mei_host_start_message(struct mei_device *dev)
-{
- struct mei_msg_hdr *mei_hdr;
- struct hbm_host_version_request *start_req;
- const size_t len = sizeof(struct hbm_host_version_request);
-
- mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
-
- /* host start message */
- start_req = (struct hbm_host_version_request *)&dev->wr_msg_buf[1];
- memset(start_req, 0, len);
- start_req->hbm_cmd = HOST_START_REQ_CMD;
- start_req->host_version.major_version = HBM_MAJOR_VERSION;
- start_req->host_version.minor_version = HBM_MINOR_VERSION;
-
- dev->recvd_msg = false;
- if (mei_write_message(dev, mei_hdr, (unsigned char *)start_req, len)) {
- dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
- dev->dev_state = MEI_DEV_RESETING;
- mei_reset(dev, 1);
- }
- dev->init_clients_state = MEI_START_MESSAGE;
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
- return ;
-}
-
-/**
- * host_enum_clients_message - host sends enumeration client request message.
- *
- * @dev: the device structure
- *
- * returns none.
- */
-void mei_host_enum_clients_message(struct mei_device *dev)
-{
- struct mei_msg_hdr *mei_hdr;
- struct hbm_host_enum_request *enum_req;
- const size_t len = sizeof(struct hbm_host_enum_request);
- /* enumerate clients */
- mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
-
- enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
- memset(enum_req, 0, sizeof(struct hbm_host_enum_request));
- enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
-
- if (mei_write_message(dev, mei_hdr, (unsigned char *)enum_req, len)) {
- dev->dev_state = MEI_DEV_RESETING;
- dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
- mei_reset(dev, 1);
- }
- dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE;
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
- return;
-}
-
-
-/**
- * allocate_me_clients_storage - allocates storage for me clients
- *
- * @dev: the device structure
- *
- * returns none.
- */
-void mei_allocate_me_clients_storage(struct mei_device *dev)
-{
- struct mei_me_client *clients;
- int b;
-
- /* count how many ME clients we have */
- for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX)
- dev->me_clients_num++;
-
- if (dev->me_clients_num <= 0)
- return ;
-
-
- if (dev->me_clients != NULL) {
- kfree(dev->me_clients);
- dev->me_clients = NULL;
- }
- dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n",
- dev->me_clients_num * sizeof(struct mei_me_client));
- /* allocate storage for ME clients representation */
- clients = kcalloc(dev->me_clients_num,
- sizeof(struct mei_me_client), GFP_KERNEL);
- if (!clients) {
- dev_dbg(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
- dev->dev_state = MEI_DEV_RESETING;
- mei_reset(dev, 1);
- return ;
- }
- dev->me_clients = clients;
- return ;
-}
-
-void mei_host_client_init(struct work_struct *work)
-{
- struct mei_device *dev = container_of(work,
- struct mei_device, init_work);
- struct mei_client_properties *client_props;
- int i;
-
- mutex_lock(&dev->device_lock);
-
- bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
- dev->open_handle_count = 0;
-
- /*
- * Reserving the first three client IDs
- * 0: Reserved for MEI Bus Message communications
- * 1: Reserved for Watchdog
- * 2: Reserved for AMTHI
- */
- bitmap_set(dev->host_clients_map, 0, 3);
-
- for (i = 0; i < dev->me_clients_num; i++) {
- client_props = &dev->me_clients[i].props;
-
- if (!uuid_le_cmp(client_props->protocol_name, mei_amthi_guid))
- mei_amthif_host_init(dev);
- else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid))
- mei_wd_host_init(dev);
- }
-
- dev->dev_state = MEI_DEV_ENABLED;
-
- mutex_unlock(&dev->device_lock);
-}
-
-int mei_host_client_enumerate(struct mei_device *dev)
-{
-
- struct mei_msg_hdr *mei_hdr;
- struct hbm_props_request *prop_req;
- const size_t len = sizeof(struct hbm_props_request);
- unsigned long next_client_index;
- u8 client_num;
-
-
- client_num = dev->me_client_presentation_num;
-
- next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
- dev->me_client_index);
-
- /* We got all client properties */
- if (next_client_index == MEI_CLIENTS_MAX) {
- schedule_work(&dev->init_work);
-
- return 0;
- }
-
- dev->me_clients[client_num].client_id = next_client_index;
- dev->me_clients[client_num].mei_flow_ctrl_creds = 0;
-
- mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
- prop_req = (struct hbm_props_request *)&dev->wr_msg_buf[1];
-
- memset(prop_req, 0, sizeof(struct hbm_props_request));
-
-
- prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
- prop_req->address = next_client_index;
-
- if (mei_write_message(dev, mei_hdr, (unsigned char *) prop_req,
- mei_hdr->length)) {
- dev->dev_state = MEI_DEV_RESETING;
- dev_err(&dev->pdev->dev, "Properties request command failed\n");
- mei_reset(dev, 1);
-
- return -EIO;
- }
-
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
- dev->me_client_index = next_client_index;
-
- return 0;
-}
-
-/**
- * mei_init_file_private - initializes private file structure.
- *
- * @priv: private file structure to be initialized
- * @file: the file structure
- */
-void mei_cl_init(struct mei_cl *priv, struct mei_device *dev)
-{
- memset(priv, 0, sizeof(struct mei_cl));
- init_waitqueue_head(&priv->wait);
- init_waitqueue_head(&priv->rx_wait);
- init_waitqueue_head(&priv->tx_wait);
- INIT_LIST_HEAD(&priv->link);
- priv->reading_state = MEI_IDLE;
- priv->writing_state = MEI_IDLE;
- priv->dev = dev;
-}
-
-int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid)
-{
- int i, res = -ENOENT;
-
- for (i = 0; i < dev->me_clients_num; ++i)
- if (uuid_le_cmp(*cuuid,
- dev->me_clients[i].props.protocol_name) == 0) {
- res = i;
- break;
- }
-
- return res;
-}
-
-
-/**
- * mei_me_cl_link - create link between host and me clinet and add
- * me_cl to the list
- *
- * @dev: the device structure
- * @cl: link between me and host client assocated with opened file descriptor
- * @cuuid: uuid of ME client
- * @client_id: id of the host client
- *
- * returns ME client index if ME client
- * -EINVAL on incorrect values
- * -ENONET if client not found
- */
-int mei_me_cl_link(struct mei_device *dev, struct mei_cl *cl,
- const uuid_le *cuuid, u8 host_cl_id)
-{
- int i;
-
- if (!dev || !cl || !cuuid)
- return -EINVAL;
-
- /* check for valid client id */
- i = mei_me_cl_by_uuid(dev, cuuid);
- if (i >= 0) {
- cl->me_client_id = dev->me_clients[i].client_id;
- cl->state = MEI_FILE_CONNECTING;
- cl->host_client_id = host_cl_id;
-
- list_add_tail(&cl->link, &dev->file_list);
- return (u8)i;
- }
-
- return -ENOENT;
-}
-/**
- * mei_me_cl_unlink - remove me_cl from the list
- *
- * @dev: the device structure
- * @host_client_id: host client id to be removed
- */
-void mei_me_cl_unlink(struct mei_device *dev, struct mei_cl *cl)
-{
- struct mei_cl *pos, *next;
- list_for_each_entry_safe(pos, next, &dev->file_list, link) {
- if (cl->host_client_id == pos->host_client_id) {
- dev_dbg(&dev->pdev->dev, "remove host client = %d, ME client = %d\n",
- pos->host_client_id, pos->me_client_id);
- list_del_init(&pos->link);
- break;
- }
- }
-}
+ /* wake up all readings so they can be interrupted */
+ mei_cl_all_read_wakeup(dev);
-/**
- * mei_alloc_file_private - allocates a private file structure and sets it up.
- * @file: the file structure
- *
- * returns The allocated file or NULL on failure
- */
-struct mei_cl *mei_cl_allocate(struct mei_device *dev)
-{
- struct mei_cl *cl;
-
- cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL);
- if (!cl)
- return NULL;
-
- mei_cl_init(cl, dev);
-
- return cl;
+ /* remove all waiting requests */
+ mei_cl_all_write_clear(dev);
}
-/**
- * mei_disconnect_host_client - sends disconnect message to fw from host client.
- *
- * @dev: the device structure
- * @cl: private data of the file object
- *
- * Locking: called under "dev->device_lock" lock
- *
- * returns 0 on success, <0 on failure.
- */
-int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl)
-{
- struct mei_cl_cb *cb;
- int rets, err;
-
- if (!dev || !cl)
- return -ENODEV;
-
- if (cl->state != MEI_FILE_DISCONNECTING)
- return 0;
-
- cb = mei_io_cb_init(cl, NULL);
- if (!cb)
- return -ENOMEM;
-
- cb->fop_type = MEI_FOP_CLOSE;
- if (dev->mei_host_buffer_is_empty) {
- dev->mei_host_buffer_is_empty = false;
- if (mei_disconnect(dev, cl)) {
- rets = -ENODEV;
- dev_dbg(&dev->pdev->dev, "failed to call mei_disconnect.\n");
- goto free;
- }
- mdelay(10); /* Wait for hardware disconnection ready */
- list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
- } else {
- dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n");
- list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
-
- }
- mutex_unlock(&dev->device_lock);
-
- err = wait_event_timeout(dev->wait_recvd_msg,
- MEI_FILE_DISCONNECTED == cl->state,
- mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
-
- mutex_lock(&dev->device_lock);
- if (MEI_FILE_DISCONNECTED == cl->state) {
- rets = 0;
- dev_dbg(&dev->pdev->dev, "successfully disconnected from FW client.\n");
- } else {
- rets = -ENODEV;
- if (MEI_FILE_DISCONNECTED != cl->state)
- dev_dbg(&dev->pdev->dev, "wrong status client disconnect.\n");
-
- if (err)
- dev_dbg(&dev->pdev->dev,
- "wait failed disconnect err=%08x\n",
- err);
-
- dev_dbg(&dev->pdev->dev, "failed to disconnect from FW client.\n");
- }
-
- mei_io_list_flush(&dev->ctrl_rd_list, cl);
- mei_io_list_flush(&dev->ctrl_wr_list, cl);
-free:
- mei_io_cb_free(cb);
- return rets;
-}
diff --git a/drivers/misc/mei/interface.c b/drivers/misc/mei/interface.c
deleted file mode 100644
index 8de85478596..00000000000
--- a/drivers/misc/mei/interface.c
+++ /dev/null
@@ -1,388 +0,0 @@
-/*
- *
- * Intel Management Engine Interface (Intel MEI) Linux driver
- * Copyright (c) 2003-2012, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- */
-
-#include <linux/pci.h>
-#include "mei_dev.h"
-#include <linux/mei.h>
-#include "interface.h"
-
-
-
-/**
- * mei_set_csr_register - writes H_CSR register to the mei device,
- * and ignores the H_IS bit for it is write-one-to-zero.
- *
- * @dev: the device structure
- */
-void mei_hcsr_set(struct mei_device *dev)
-{
- if ((dev->host_hw_state & H_IS) == H_IS)
- dev->host_hw_state &= ~H_IS;
- mei_reg_write(dev, H_CSR, dev->host_hw_state);
- dev->host_hw_state = mei_hcsr_read(dev);
-}
-
-/**
- * mei_csr_enable_interrupts - enables mei device interrupts
- *
- * @dev: the device structure
- */
-void mei_enable_interrupts(struct mei_device *dev)
-{
- dev->host_hw_state |= H_IE;
- mei_hcsr_set(dev);
-}
-
-/**
- * mei_csr_disable_interrupts - disables mei device interrupts
- *
- * @dev: the device structure
- */
-void mei_disable_interrupts(struct mei_device *dev)
-{
- dev->host_hw_state &= ~H_IE;
- mei_hcsr_set(dev);
-}
-
-/**
- * mei_hbuf_filled_slots - gets number of device filled buffer slots
- *
- * @device: the device structure
- *
- * returns number of filled slots
- */
-static unsigned char mei_hbuf_filled_slots(struct mei_device *dev)
-{
- char read_ptr, write_ptr;
-
- dev->host_hw_state = mei_hcsr_read(dev);
-
- read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
- write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
-
- return (unsigned char) (write_ptr - read_ptr);
-}
-
-/**
- * mei_hbuf_is_empty - checks if host buffer is empty.
- *
- * @dev: the device structure
- *
- * returns true if empty, false - otherwise.
- */
-bool mei_hbuf_is_empty(struct mei_device *dev)
-{
- return mei_hbuf_filled_slots(dev) == 0;
-}
-
-/**
- * mei_hbuf_empty_slots - counts write empty slots.
- *
- * @dev: the device structure
- *
- * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
- */
-int mei_hbuf_empty_slots(struct mei_device *dev)
-{
- unsigned char filled_slots, empty_slots;
-
- filled_slots = mei_hbuf_filled_slots(dev);
- empty_slots = dev->hbuf_depth - filled_slots;
-
- /* check for overflow */
- if (filled_slots > dev->hbuf_depth)
- return -EOVERFLOW;
-
- return empty_slots;
-}
-
-/**
- * mei_write_message - writes a message to mei device.
- *
- * @dev: the device structure
- * @header: header of message
- * @write_buffer: message buffer will be written
- * @write_length: message size will be written
- *
- * This function returns -EIO if write has failed
- */
-int mei_write_message(struct mei_device *dev, struct mei_msg_hdr *header,
- unsigned char *buf, unsigned long length)
-{
- unsigned long rem, dw_cnt;
- u32 *reg_buf = (u32 *)buf;
- int i;
- int empty_slots;
-
-
- dev_dbg(&dev->pdev->dev,
- "mei_write_message header=%08x.\n",
- *((u32 *) header));
-
- empty_slots = mei_hbuf_empty_slots(dev);
- dev_dbg(&dev->pdev->dev, "empty slots = %hu.\n", empty_slots);
-
- dw_cnt = mei_data2slots(length);
- if (empty_slots < 0 || dw_cnt > empty_slots)
- return -EIO;
-
- mei_reg_write(dev, H_CB_WW, *((u32 *) header));
-
- for (i = 0; i < length / 4; i++)
- mei_reg_write(dev, H_CB_WW, reg_buf[i]);
-
- rem = length & 0x3;
- if (rem > 0) {
- u32 reg = 0;
- memcpy(&reg, &buf[length - rem], rem);
- mei_reg_write(dev, H_CB_WW, reg);
- }
-
- dev->host_hw_state = mei_hcsr_read(dev);
- dev->host_hw_state |= H_IG;
- mei_hcsr_set(dev);
- dev->me_hw_state = mei_mecsr_read(dev);
- if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
- return -EIO;
-
- return 0;
-}
-
-/**
- * mei_count_full_read_slots - counts read full slots.
- *
- * @dev: the device structure
- *
- * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
- */
-int mei_count_full_read_slots(struct mei_device *dev)
-{
- char read_ptr, write_ptr;
- unsigned char buffer_depth, filled_slots;
-
- dev->me_hw_state = mei_mecsr_read(dev);
- buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
- read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
- write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
- filled_slots = (unsigned char) (write_ptr - read_ptr);
-
- /* check for overflow */
- if (filled_slots > buffer_depth)
- return -EOVERFLOW;
-
- dev_dbg(&dev->pdev->dev, "filled_slots =%08x\n", filled_slots);
- return (int)filled_slots;
-}
-
-/**
- * mei_read_slots - reads a message from mei device.
- *
- * @dev: the device structure
- * @buffer: message buffer will be written
- * @buffer_length: message size will be read
- */
-void mei_read_slots(struct mei_device *dev, unsigned char *buffer,
- unsigned long buffer_length)
-{
- u32 *reg_buf = (u32 *)buffer;
-
- for (; buffer_length >= sizeof(u32); buffer_length -= sizeof(u32))
- *reg_buf++ = mei_mecbrw_read(dev);
-
- if (buffer_length > 0) {
- u32 reg = mei_mecbrw_read(dev);
- memcpy(reg_buf, &reg, buffer_length);
- }
-
- dev->host_hw_state |= H_IG;
- mei_hcsr_set(dev);
-}
-
-/**
- * mei_flow_ctrl_creds - checks flow_control credentials.
- *
- * @dev: the device structure
- * @cl: private data of the file object
- *
- * returns 1 if mei_flow_ctrl_creds >0, 0 - otherwise.
- * -ENOENT if mei_cl is not present
- * -EINVAL if single_recv_buf == 0
- */
-int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl)
-{
- int i;
-
- if (!dev->me_clients_num)
- return 0;
-
- if (cl->mei_flow_ctrl_creds > 0)
- return 1;
-
- for (i = 0; i < dev->me_clients_num; i++) {
- struct mei_me_client *me_cl = &dev->me_clients[i];
- if (me_cl->client_id == cl->me_client_id) {
- if (me_cl->mei_flow_ctrl_creds) {
- if (WARN_ON(me_cl->props.single_recv_buf == 0))
- return -EINVAL;
- return 1;
- } else {
- return 0;
- }
- }
- }
- return -ENOENT;
-}
-
-/**
- * mei_flow_ctrl_reduce - reduces flow_control.
- *
- * @dev: the device structure
- * @cl: private data of the file object
- * @returns
- * 0 on success
- * -ENOENT when me client is not found
- * -EINVAL when ctrl credits are <= 0
- */
-int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl)
-{
- int i;
-
- if (!dev->me_clients_num)
- return -ENOENT;
-
- for (i = 0; i < dev->me_clients_num; i++) {
- struct mei_me_client *me_cl = &dev->me_clients[i];
- if (me_cl->client_id == cl->me_client_id) {
- if (me_cl->props.single_recv_buf != 0) {
- if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))
- return -EINVAL;
- dev->me_clients[i].mei_flow_ctrl_creds--;
- } else {
- if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))
- return -EINVAL;
- cl->mei_flow_ctrl_creds--;
- }
- return 0;
- }
- }
- return -ENOENT;
-}
-
-/**
- * mei_send_flow_control - sends flow control to fw.
- *
- * @dev: the device structure
- * @cl: private data of the file object
- *
- * This function returns -EIO on write failure
- */
-int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl)
-{
- struct mei_msg_hdr *mei_hdr;
- struct hbm_flow_control *flow_ctrl;
- const size_t len = sizeof(struct hbm_flow_control);
-
- mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
-
- flow_ctrl = (struct hbm_flow_control *)&dev->wr_msg_buf[1];
- memset(flow_ctrl, 0, len);
- flow_ctrl->hbm_cmd = MEI_FLOW_CONTROL_CMD;
- flow_ctrl->host_addr = cl->host_client_id;
- flow_ctrl->me_addr = cl->me_client_id;
- /* FIXME: reserved !? */
- memset(flow_ctrl->reserved, 0, sizeof(flow_ctrl->reserved));
- dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
- cl->host_client_id, cl->me_client_id);
-
- return mei_write_message(dev, mei_hdr,
- (unsigned char *) flow_ctrl, len);
-}
-
-/**
- * mei_other_client_is_connecting - checks if other
- * client with the same client id is connected.
- *
- * @dev: the device structure
- * @cl: private data of the file object
- *
- * returns 1 if other client is connected, 0 - otherwise.
- */
-int mei_other_client_is_connecting(struct mei_device *dev,
- struct mei_cl *cl)
-{
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
-
- list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
- if ((cl_pos->state == MEI_FILE_CONNECTING) &&
- (cl_pos != cl) &&
- cl->me_client_id == cl_pos->me_client_id)
- return 1;
-
- }
- return 0;
-}
-
-/**
- * mei_disconnect - sends disconnect message to fw.
- *
- * @dev: the device structure
- * @cl: private data of the file object
- *
- * This function returns -EIO on write failure
- */
-int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
-{
- struct mei_msg_hdr *mei_hdr;
- struct hbm_client_connect_request *req;
- const size_t len = sizeof(struct hbm_client_connect_request);
-
- mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
-
- req = (struct hbm_client_connect_request *)&dev->wr_msg_buf[1];
- memset(req, 0, len);
- req->hbm_cmd = CLIENT_DISCONNECT_REQ_CMD;
- req->host_addr = cl->host_client_id;
- req->me_addr = cl->me_client_id;
- req->reserved = 0;
-
- return mei_write_message(dev, mei_hdr, (unsigned char *)req, len);
-}
-
-/**
- * mei_connect - sends connect message to fw.
- *
- * @dev: the device structure
- * @cl: private data of the file object
- *
- * This function returns -EIO on write failure
- */
-int mei_connect(struct mei_device *dev, struct mei_cl *cl)
-{
- struct mei_msg_hdr *mei_hdr;
- struct hbm_client_connect_request *req;
- const size_t len = sizeof(struct hbm_client_connect_request);
-
- mei_hdr = mei_hbm_hdr(&dev->wr_msg_buf[0], len);
-
- req = (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
- req->hbm_cmd = CLIENT_CONNECT_REQ_CMD;
- req->host_addr = cl->host_client_id;
- req->me_addr = cl->me_client_id;
- req->reserved = 0;
-
- return mei_write_message(dev, mei_hdr, (unsigned char *) req, len);
-}
diff --git a/drivers/misc/mei/interface.h b/drivers/misc/mei/interface.h
deleted file mode 100644
index ec6c785a396..00000000000
--- a/drivers/misc/mei/interface.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- *
- * Intel Management Engine Interface (Intel MEI) Linux driver
- * Copyright (c) 2003-2012, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- */
-
-
-
-#ifndef _MEI_INTERFACE_H_
-#define _MEI_INTERFACE_H_
-
-#include <linux/mei.h>
-#include "mei_dev.h"
-
-
-
-void mei_read_slots(struct mei_device *dev,
- unsigned char *buffer,
- unsigned long buffer_length);
-
-int mei_write_message(struct mei_device *dev,
- struct mei_msg_hdr *header,
- unsigned char *write_buffer,
- unsigned long write_length);
-
-bool mei_hbuf_is_empty(struct mei_device *dev);
-
-int mei_hbuf_empty_slots(struct mei_device *dev);
-
-static inline size_t mei_hbuf_max_data(const struct mei_device *dev)
-{
- return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr);
-}
-
-/* get slots (dwords) from a message length + header (bytes) */
-static inline unsigned char mei_data2slots(size_t length)
-{
- return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
-}
-
-int mei_count_full_read_slots(struct mei_device *dev);
-
-
-int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);
-
-
-
-int mei_wd_send(struct mei_device *dev);
-int mei_wd_stop(struct mei_device *dev);
-int mei_wd_host_init(struct mei_device *dev);
-/*
- * mei_watchdog_register - Registering watchdog interface
- * once we got connection to the WD Client
- * @dev - mei device
- */
-void mei_watchdog_register(struct mei_device *dev);
-/*
- * mei_watchdog_unregister - Unregistering watchdog interface
- * @dev - mei device
- */
-void mei_watchdog_unregister(struct mei_device *dev);
-
-int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl);
-
-int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl);
-
-int mei_disconnect(struct mei_device *dev, struct mei_cl *cl);
-int mei_other_client_is_connecting(struct mei_device *dev, struct mei_cl *cl);
-int mei_connect(struct mei_device *dev, struct mei_cl *cl);
-
-#endif /* _MEI_INTERFACE_H_ */
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 04fa2134615..3535b2676c9 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -21,41 +21,21 @@
#include <linux/fs.h>
#include <linux/jiffies.h>
-#include "mei_dev.h"
#include <linux/mei.h>
-#include "hw.h"
-#include "interface.h"
-
-
-/**
- * mei_interrupt_quick_handler - The ISR of the MEI device
- *
- * @irq: The irq number
- * @dev_id: pointer to the device structure
- *
- * returns irqreturn_t
- */
-irqreturn_t mei_interrupt_quick_handler(int irq, void *dev_id)
-{
- struct mei_device *dev = (struct mei_device *) dev_id;
- u32 csr_reg = mei_hcsr_read(dev);
-
- if ((csr_reg & H_IS) != H_IS)
- return IRQ_NONE;
- /* clear H_IS bit in H_CSR */
- mei_reg_write(dev, H_CSR, csr_reg);
+#include "mei_dev.h"
+#include "hbm.h"
+#include "hw-me.h"
+#include "client.h"
- return IRQ_WAKE_THREAD;
-}
/**
- * _mei_cmpl - processes completed operation.
+ * mei_complete_handler - processes completed operation.
*
* @cl: private data of the file object.
* @cb_pos: callback block.
*/
-static void _mei_cmpl(struct mei_cl *cl, struct mei_cl_cb *cb_pos)
+void mei_irq_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb_pos)
{
if (cb_pos->fop_type == MEI_FOP_WRITE) {
mei_io_cb_free(cb_pos);
@@ -150,8 +130,8 @@ quit:
dev_dbg(&dev->pdev->dev, "message read\n");
if (!buffer) {
mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length);
- dev_dbg(&dev->pdev->dev, "discarding message, header =%08x.\n",
- *(u32 *) dev->rd_msg_buf);
+ dev_dbg(&dev->pdev->dev, "discarding message " MEI_HDR_FMT "\n",
+ MEI_HDR_PRM(mei_hdr));
}
return 0;
@@ -179,7 +159,7 @@ static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots,
*slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
- if (mei_disconnect(dev, cl)) {
+ if (mei_hbm_cl_disconnect_req(dev, cl)) {
cl->status = 0;
cb_pos->buf_idx = 0;
list_move_tail(&cb_pos->list, &cmpl_list->list);
@@ -195,440 +175,6 @@ static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots,
return 0;
}
-/**
- * is_treat_specially_client - checks if the message belongs
- * to the file private data.
- *
- * @cl: private data of the file object
- * @rs: connect response bus message
- *
- */
-static bool is_treat_specially_client(struct mei_cl *cl,
- struct hbm_client_connect_response *rs)
-{
-
- if (cl->host_client_id == rs->host_addr &&
- cl->me_client_id == rs->me_addr) {
- if (!rs->status) {
- cl->state = MEI_FILE_CONNECTED;
- cl->status = 0;
-
- } else {
- cl->state = MEI_FILE_DISCONNECTED;
- cl->status = -ENODEV;
- }
- cl->timer_count = 0;
-
- return true;
- }
- return false;
-}
-
-/**
- * mei_client_connect_response - connects to response irq routine
- *
- * @dev: the device structure
- * @rs: connect response bus message
- */
-static void mei_client_connect_response(struct mei_device *dev,
- struct hbm_client_connect_response *rs)
-{
-
- struct mei_cl *cl;
- struct mei_cl_cb *pos = NULL, *next = NULL;
-
- dev_dbg(&dev->pdev->dev,
- "connect_response:\n"
- "ME Client = %d\n"
- "Host Client = %d\n"
- "Status = %d\n",
- rs->me_addr,
- rs->host_addr,
- rs->status);
-
- /* if WD or iamthif client treat specially */
-
- if (is_treat_specially_client(&(dev->wd_cl), rs)) {
- dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
- mei_watchdog_register(dev);
-
- return;
- }
-
- if (is_treat_specially_client(&(dev->iamthif_cl), rs)) {
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
- return;
- }
- list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
-
- cl = pos->cl;
- if (!cl) {
- list_del(&pos->list);
- return;
- }
- if (pos->fop_type == MEI_FOP_IOCTL) {
- if (is_treat_specially_client(cl, rs)) {
- list_del(&pos->list);
- cl->status = 0;
- cl->timer_count = 0;
- break;
- }
- }
- }
-}
-
-/**
- * mei_client_disconnect_response - disconnects from response irq routine
- *
- * @dev: the device structure
- * @rs: disconnect response bus message
- */
-static void mei_client_disconnect_response(struct mei_device *dev,
- struct hbm_client_connect_response *rs)
-{
- struct mei_cl *cl;
- struct mei_cl_cb *pos = NULL, *next = NULL;
-
- dev_dbg(&dev->pdev->dev,
- "disconnect_response:\n"
- "ME Client = %d\n"
- "Host Client = %d\n"
- "Status = %d\n",
- rs->me_addr,
- rs->host_addr,
- rs->status);
-
- list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
- cl = pos->cl;
-
- if (!cl) {
- list_del(&pos->list);
- return;
- }
-
- dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
- if (cl->host_client_id == rs->host_addr &&
- cl->me_client_id == rs->me_addr) {
-
- list_del(&pos->list);
- if (!rs->status)
- cl->state = MEI_FILE_DISCONNECTED;
-
- cl->status = 0;
- cl->timer_count = 0;
- break;
- }
- }
-}
-
-/**
- * same_flow_addr - tells if they have the same address.
- *
- * @file: private data of the file object.
- * @flow: flow control.
- *
- * returns !=0, same; 0,not.
- */
-static int same_flow_addr(struct mei_cl *cl, struct hbm_flow_control *flow)
-{
- return (cl->host_client_id == flow->host_addr &&
- cl->me_client_id == flow->me_addr);
-}
-
-/**
- * add_single_flow_creds - adds single buffer credentials.
- *
- * @file: private data ot the file object.
- * @flow: flow control.
- */
-static void add_single_flow_creds(struct mei_device *dev,
- struct hbm_flow_control *flow)
-{
- struct mei_me_client *client;
- int i;
-
- for (i = 0; i < dev->me_clients_num; i++) {
- client = &dev->me_clients[i];
- if (client && flow->me_addr == client->client_id) {
- if (client->props.single_recv_buf) {
- client->mei_flow_ctrl_creds++;
- dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
- flow->me_addr);
- dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
- client->mei_flow_ctrl_creds);
- } else {
- BUG(); /* error in flow control */
- }
- }
- }
-}
-
-/**
- * mei_client_flow_control_response - flow control response irq routine
- *
- * @dev: the device structure
- * @flow_control: flow control response bus message
- */
-static void mei_client_flow_control_response(struct mei_device *dev,
- struct hbm_flow_control *flow_control)
-{
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
-
- if (!flow_control->host_addr) {
- /* single receive buffer */
- add_single_flow_creds(dev, flow_control);
- } else {
- /* normal connection */
- list_for_each_entry_safe(cl_pos, cl_next,
- &dev->file_list, link) {
- dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in file_list\n");
-
- dev_dbg(&dev->pdev->dev, "cl of host client %d ME client %d.\n",
- cl_pos->host_client_id,
- cl_pos->me_client_id);
- dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
- flow_control->host_addr,
- flow_control->me_addr);
- if (same_flow_addr(cl_pos, flow_control)) {
- dev_dbg(&dev->pdev->dev, "recv ctrl msg for host %d ME %d.\n",
- flow_control->host_addr,
- flow_control->me_addr);
- cl_pos->mei_flow_ctrl_creds++;
- dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
- cl_pos->mei_flow_ctrl_creds);
- break;
- }
- }
- }
-}
-
-/**
- * same_disconn_addr - tells if they have the same address
- *
- * @file: private data of the file object.
- * @disconn: disconnection request.
- *
- * returns !=0, same; 0,not.
- */
-static int same_disconn_addr(struct mei_cl *cl,
- struct hbm_client_connect_request *req)
-{
- return (cl->host_client_id == req->host_addr &&
- cl->me_client_id == req->me_addr);
-}
-
-/**
- * mei_client_disconnect_request - disconnects from request irq routine
- *
- * @dev: the device structure.
- * @disconnect_req: disconnect request bus message.
- */
-static void mei_client_disconnect_request(struct mei_device *dev,
- struct hbm_client_connect_request *disconnect_req)
-{
- struct hbm_client_connect_response *disconnect_res;
- struct mei_cl *pos, *next;
- const size_t len = sizeof(struct hbm_client_connect_response);
-
- list_for_each_entry_safe(pos, next, &dev->file_list, link) {
- if (same_disconn_addr(pos, disconnect_req)) {
- dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
- disconnect_req->host_addr,
- disconnect_req->me_addr);
- pos->state = MEI_FILE_DISCONNECTED;
- pos->timer_count = 0;
- if (pos == &dev->wd_cl)
- dev->wd_pending = false;
- else if (pos == &dev->iamthif_cl)
- dev->iamthif_timer = 0;
-
- /* prepare disconnect response */
- (void)mei_hbm_hdr((u32 *)&dev->wr_ext_msg.hdr, len);
- disconnect_res =
- (struct hbm_client_connect_response *)
- &dev->wr_ext_msg.data;
- disconnect_res->hbm_cmd = CLIENT_DISCONNECT_RES_CMD;
- disconnect_res->host_addr = pos->host_client_id;
- disconnect_res->me_addr = pos->me_client_id;
- disconnect_res->status = 0;
- break;
- }
- }
-}
-
-/**
- * mei_irq_thread_read_bus_message - bottom half read routine after ISR to
- * handle the read bus message cmd processing.
- *
- * @dev: the device structure
- * @mei_hdr: header of bus message
- */
-static void mei_irq_thread_read_bus_message(struct mei_device *dev,
- struct mei_msg_hdr *mei_hdr)
-{
- struct mei_bus_message *mei_msg;
- struct mei_me_client *me_client;
- struct hbm_host_version_response *version_res;
- struct hbm_client_connect_response *connect_res;
- struct hbm_client_connect_response *disconnect_res;
- struct hbm_client_connect_request *disconnect_req;
- struct hbm_flow_control *flow_control;
- struct hbm_props_response *props_res;
- struct hbm_host_enum_response *enum_res;
- struct hbm_host_stop_request *stop_req;
-
- /* read the message to our buffer */
- BUG_ON(mei_hdr->length >= sizeof(dev->rd_msg_buf));
- mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length);
- mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
-
- switch (mei_msg->hbm_cmd) {
- case HOST_START_RES_CMD:
- version_res = (struct hbm_host_version_response *) mei_msg;
- if (version_res->host_version_supported) {
- dev->version.major_version = HBM_MAJOR_VERSION;
- dev->version.minor_version = HBM_MINOR_VERSION;
- if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
- dev->init_clients_state == MEI_START_MESSAGE) {
- dev->init_clients_timer = 0;
- mei_host_enum_clients_message(dev);
- } else {
- dev->recvd_msg = false;
- dev_dbg(&dev->pdev->dev, "IMEI reset due to received host start response bus message.\n");
- mei_reset(dev, 1);
- return;
- }
- } else {
- u32 *buf = dev->wr_msg_buf;
- const size_t len = sizeof(struct hbm_host_stop_request);
-
- dev->version = version_res->me_max_version;
-
- /* send stop message */
- mei_hdr = mei_hbm_hdr(&buf[0], len);
- stop_req = (struct hbm_host_stop_request *)&buf[1];
- memset(stop_req, 0, len);
- stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
- stop_req->reason = DRIVER_STOP_REQUEST;
-
- mei_write_message(dev, mei_hdr,
- (unsigned char *)stop_req, len);
- dev_dbg(&dev->pdev->dev, "version mismatch.\n");
- return;
- }
-
- dev->recvd_msg = true;
- dev_dbg(&dev->pdev->dev, "host start response message received.\n");
- break;
-
- case CLIENT_CONNECT_RES_CMD:
- connect_res = (struct hbm_client_connect_response *) mei_msg;
- mei_client_connect_response(dev, connect_res);
- dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
- wake_up(&dev->wait_recvd_msg);
- break;
-
- case CLIENT_DISCONNECT_RES_CMD:
- disconnect_res = (struct hbm_client_connect_response *) mei_msg;
- mei_client_disconnect_response(dev, disconnect_res);
- dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
- wake_up(&dev->wait_recvd_msg);
- break;
-
- case MEI_FLOW_CONTROL_CMD:
- flow_control = (struct hbm_flow_control *) mei_msg;
- mei_client_flow_control_response(dev, flow_control);
- dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
- break;
-
- case HOST_CLIENT_PROPERTIES_RES_CMD:
- props_res = (struct hbm_props_response *)mei_msg;
- me_client = &dev->me_clients[dev->me_client_presentation_num];
-
- if (props_res->status || !dev->me_clients) {
- dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n");
- mei_reset(dev, 1);
- return;
- }
-
- if (me_client->client_id != props_res->address) {
- dev_err(&dev->pdev->dev,
- "Host client properties reply mismatch\n");
- mei_reset(dev, 1);
-
- return;
- }
-
- if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
- dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) {
- dev_err(&dev->pdev->dev,
- "Unexpected client properties reply\n");
- mei_reset(dev, 1);
-
- return;
- }
-
- me_client->props = props_res->client_properties;
- dev->me_client_index++;
- dev->me_client_presentation_num++;
-
- mei_host_client_enumerate(dev);
-
- break;
-
- case HOST_ENUM_RES_CMD:
- enum_res = (struct hbm_host_enum_response *) mei_msg;
- memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
- if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
- dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) {
- dev->init_clients_timer = 0;
- dev->me_client_presentation_num = 0;
- dev->me_client_index = 0;
- mei_allocate_me_clients_storage(dev);
- dev->init_clients_state =
- MEI_CLIENT_PROPERTIES_MESSAGE;
-
- mei_host_client_enumerate(dev);
- } else {
- dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n");
- mei_reset(dev, 1);
- return;
- }
- break;
-
- case HOST_STOP_RES_CMD:
- dev->dev_state = MEI_DEV_DISABLED;
- dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n");
- mei_reset(dev, 1);
- break;
-
- case CLIENT_DISCONNECT_REQ_CMD:
- /* search for client */
- disconnect_req = (struct hbm_client_connect_request *)mei_msg;
- mei_client_disconnect_request(dev, disconnect_req);
- break;
-
- case ME_STOP_REQ_CMD:
- {
- /* prepare stop request: sent in next interrupt event */
-
- const size_t len = sizeof(struct hbm_host_stop_request);
-
- mei_hdr = mei_hbm_hdr((u32 *)&dev->wr_ext_msg.hdr, len);
- stop_req = (struct hbm_host_stop_request *)&dev->wr_ext_msg.data;
- memset(stop_req, 0, len);
- stop_req->hbm_cmd = HOST_STOP_REQ_CMD;
- stop_req->reason = DRIVER_STOP_REQUEST;
- break;
- }
- default:
- BUG();
- break;
-
- }
-}
-
/**
* _mei_hb_read - processes read related operation.
@@ -655,7 +201,7 @@ static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots,
*slots -= mei_data2slots(sizeof(struct hbm_flow_control));
- if (mei_send_flow_control(dev, cl)) {
+ if (mei_hbm_cl_flow_control_req(dev, cl)) {
cl->status = -ENODEV;
cb_pos->buf_idx = 0;
list_move_tail(&cb_pos->list, &cmpl_list->list);
@@ -691,8 +237,8 @@ static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots,
}
cl->state = MEI_FILE_CONNECTING;
- *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
- if (mei_connect(dev, cl)) {
+ *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
+ if (mei_hbm_cl_connect_req(dev, cl)) {
cl->status = -ENODEV;
cb_pos->buf_idx = 0;
list_del(&cb_pos->list);
@@ -717,25 +263,24 @@ static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots,
static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots,
struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list)
{
- struct mei_msg_hdr *mei_hdr;
+ struct mei_msg_hdr mei_hdr;
struct mei_cl *cl = cb->cl;
size_t len = cb->request_buffer.size - cb->buf_idx;
size_t msg_slots = mei_data2slots(len);
- mei_hdr = (struct mei_msg_hdr *)&dev->wr_msg_buf[0];
- mei_hdr->host_addr = cl->host_client_id;
- mei_hdr->me_addr = cl->me_client_id;
- mei_hdr->reserved = 0;
+ mei_hdr.host_addr = cl->host_client_id;
+ mei_hdr.me_addr = cl->me_client_id;
+ mei_hdr.reserved = 0;
if (*slots >= msg_slots) {
- mei_hdr->length = len;
- mei_hdr->msg_complete = 1;
+ mei_hdr.length = len;
+ mei_hdr.msg_complete = 1;
/* Split the message only if we can write the whole host buffer */
} else if (*slots == dev->hbuf_depth) {
msg_slots = *slots;
len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
- mei_hdr->length = len;
- mei_hdr->msg_complete = 0;
+ mei_hdr.length = len;
+ mei_hdr.msg_complete = 0;
} else {
/* wait for next time the host buffer is empty */
return 0;
@@ -743,23 +288,22 @@ static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots,
dev_dbg(&dev->pdev->dev, "buf: size = %d idx = %lu\n",
cb->request_buffer.size, cb->buf_idx);
- dev_dbg(&dev->pdev->dev, "msg: len = %d complete = %d\n",
- mei_hdr->length, mei_hdr->msg_complete);
+ dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
*slots -= msg_slots;
- if (mei_write_message(dev, mei_hdr,
- cb->request_buffer.data + cb->buf_idx, len)) {
+ if (mei_write_message(dev, &mei_hdr,
+ cb->request_buffer.data + cb->buf_idx)) {
cl->status = -ENODEV;
list_move_tail(&cb->list, &cmpl_list->list);
return -ENODEV;
}
- if (mei_flow_ctrl_reduce(dev, cl))
+ if (mei_cl_flow_ctrl_reduce(cl))
return -ENODEV;
cl->status = 0;
- cb->buf_idx += mei_hdr->length;
- if (mei_hdr->msg_complete)
+ cb->buf_idx += mei_hdr.length;
+ if (mei_hdr.msg_complete)
list_move_tail(&cb->list, &dev->write_waiting_list.list);
return 0;
@@ -769,15 +313,14 @@ static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots,
* mei_irq_thread_read_handler - bottom half read routine after ISR to
* handle the read processing.
*
- * @cmpl_list: An instance of our list structure
* @dev: the device structure
+ * @cmpl_list: An instance of our list structure
* @slots: slots to read.
*
* returns 0 on success, <0 on failure.
*/
-static int mei_irq_thread_read_handler(struct mei_cl_cb *cmpl_list,
- struct mei_device *dev,
- s32 *slots)
+int mei_irq_read_handler(struct mei_device *dev,
+ struct mei_cl_cb *cmpl_list, s32 *slots)
{
struct mei_msg_hdr *mei_hdr;
struct mei_cl *cl_pos = NULL;
@@ -785,13 +328,13 @@ static int mei_irq_thread_read_handler(struct mei_cl_cb *cmpl_list,
int ret = 0;
if (!dev->rd_msg_hdr) {
- dev->rd_msg_hdr = mei_mecbrw_read(dev);
+ dev->rd_msg_hdr = mei_read_hdr(dev);
dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
(*slots)--;
dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
}
mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr;
- dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", mei_hdr->length);
+ dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
if (mei_hdr->reserved || !dev->rd_msg_hdr) {
dev_dbg(&dev->pdev->dev, "corrupted message header.\n");
@@ -830,19 +373,18 @@ static int mei_irq_thread_read_handler(struct mei_cl_cb *cmpl_list,
/* decide where to read the message too */
if (!mei_hdr->host_addr) {
dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_bus_message.\n");
- mei_irq_thread_read_bus_message(dev, mei_hdr);
+ mei_hbm_dispatch(dev, mei_hdr);
dev_dbg(&dev->pdev->dev, "end mei_irq_thread_read_bus_message.\n");
} else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
(MEI_FILE_CONNECTED == dev->iamthif_cl.state) &&
(dev->iamthif_state == MEI_IAMTHIF_READING)) {
dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
- dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
- mei_hdr->length);
+
+ dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
ret = mei_amthif_irq_read_message(cmpl_list, dev, mei_hdr);
if (ret)
goto end;
-
} else {
dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n");
ret = mei_irq_thread_read_client_message(cmpl_list,
@@ -869,15 +411,15 @@ end:
/**
- * mei_irq_thread_write_handler - bottom half write routine after
- * ISR to handle the write processing.
+ * mei_irq_write_handler - dispatch write requests
+ * after irq received
*
* @dev: the device structure
* @cmpl_list: An instance of our list structure
*
* returns 0 on success, <0 on failure.
*/
-static int mei_irq_thread_write_handler(struct mei_device *dev,
+int mei_irq_write_handler(struct mei_device *dev,
struct mei_cl_cb *cmpl_list)
{
@@ -887,7 +429,7 @@ static int mei_irq_thread_write_handler(struct mei_device *dev,
s32 slots;
int ret;
- if (!mei_hbuf_is_empty(dev)) {
+ if (!mei_hbuf_is_ready(dev)) {
dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n");
return 0;
}
@@ -930,16 +472,16 @@ static int mei_irq_thread_write_handler(struct mei_device *dev,
if (dev->wr_ext_msg.hdr.length) {
mei_write_message(dev, &dev->wr_ext_msg.hdr,
- dev->wr_ext_msg.data, dev->wr_ext_msg.hdr.length);
+ dev->wr_ext_msg.data);
slots -= mei_data2slots(dev->wr_ext_msg.hdr.length);
dev->wr_ext_msg.hdr.length = 0;
}
if (dev->dev_state == MEI_DEV_ENABLED) {
if (dev->wd_pending &&
- mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) {
+ mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) {
if (mei_wd_send(dev))
dev_dbg(&dev->pdev->dev, "wd send failed.\n");
- else if (mei_flow_ctrl_reduce(dev, &dev->wd_cl))
+ else if (mei_cl_flow_ctrl_reduce(&dev->wd_cl))
return -ENODEV;
dev->wd_pending = false;
@@ -978,7 +520,7 @@ static int mei_irq_thread_write_handler(struct mei_device *dev,
break;
case MEI_FOP_IOCTL:
/* connect message */
- if (mei_other_client_is_connecting(dev, cl))
+ if (mei_cl_is_other_connecting(cl))
continue;
ret = _mei_irq_thread_ioctl(dev, &slots, pos,
cl, cmpl_list);
@@ -998,7 +540,7 @@ static int mei_irq_thread_write_handler(struct mei_device *dev,
cl = pos->cl;
if (cl == NULL)
continue;
- if (mei_flow_ctrl_creds(dev, cl) <= 0) {
+ if (mei_cl_flow_ctrl_creds(cl) <= 0) {
dev_dbg(&dev->pdev->dev,
"No flow control credentials for client %d, not sending.\n",
cl->host_client_id);
@@ -1123,115 +665,3 @@ out:
mutex_unlock(&dev->device_lock);
}
-/**
- * mei_interrupt_thread_handler - function called after ISR to handle the interrupt
- * processing.
- *
- * @irq: The irq number
- * @dev_id: pointer to the device structure
- *
- * returns irqreturn_t
- *
- */
-irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id)
-{
- struct mei_device *dev = (struct mei_device *) dev_id;
- struct mei_cl_cb complete_list;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
- struct mei_cl *cl;
- s32 slots;
- int rets;
- bool bus_message_received;
-
-
- dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n");
- /* initialize our complete list */
- mutex_lock(&dev->device_lock);
- mei_io_list_init(&complete_list);
- dev->host_hw_state = mei_hcsr_read(dev);
-
- /* Ack the interrupt here
- * In case of MSI we don't go through the quick handler */
- if (pci_dev_msi_enabled(dev->pdev))
- mei_reg_write(dev, H_CSR, dev->host_hw_state);
-
- dev->me_hw_state = mei_mecsr_read(dev);
-
- /* check if ME wants a reset */
- if ((dev->me_hw_state & ME_RDY_HRA) == 0 &&
- dev->dev_state != MEI_DEV_RESETING &&
- dev->dev_state != MEI_DEV_INITIALIZING) {
- dev_dbg(&dev->pdev->dev, "FW not ready.\n");
- mei_reset(dev, 1);
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
- }
-
- /* check if we need to start the dev */
- if ((dev->host_hw_state & H_RDY) == 0) {
- if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
- dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
- dev->host_hw_state |= (H_IE | H_IG | H_RDY);
- mei_hcsr_set(dev);
- dev->dev_state = MEI_DEV_INIT_CLIENTS;
- dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
- /* link is established
- * start sending messages.
- */
- mei_host_start_message(dev);
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
- } else {
- dev_dbg(&dev->pdev->dev, "FW not ready.\n");
- mutex_unlock(&dev->device_lock);
- return IRQ_HANDLED;
- }
- }
- /* check slots available for reading */
- slots = mei_count_full_read_slots(dev);
- while (slots > 0) {
- /* we have urgent data to send so break the read */
- if (dev->wr_ext_msg.hdr.length)
- break;
- dev_dbg(&dev->pdev->dev, "slots =%08x\n", slots);
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_handler.\n");
- rets = mei_irq_thread_read_handler(&complete_list, dev, &slots);
- if (rets)
- goto end;
- }
- rets = mei_irq_thread_write_handler(dev, &complete_list);
-end:
- dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
- dev->host_hw_state = mei_hcsr_read(dev);
- dev->mei_host_buffer_is_empty = mei_hbuf_is_empty(dev);
-
- bus_message_received = false;
- if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
- dev_dbg(&dev->pdev->dev, "received waiting bus message\n");
- bus_message_received = true;
- }
- mutex_unlock(&dev->device_lock);
- if (bus_message_received) {
- dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n");
- wake_up_interruptible(&dev->wait_recvd_msg);
- bus_message_received = false;
- }
- if (list_empty(&complete_list.list))
- return IRQ_HANDLED;
-
-
- list_for_each_entry_safe(cb_pos, cb_next, &complete_list.list, list) {
- cl = cb_pos->cl;
- list_del(&cb_pos->list);
- if (cl) {
- if (cl != &dev->iamthif_cl) {
- dev_dbg(&dev->pdev->dev, "completing call back.\n");
- _mei_cmpl(cl, cb_pos);
- cb_pos = NULL;
- } else if (cl == &dev->iamthif_cl) {
- mei_amthif_complete(dev, cb_pos);
- }
- }
- }
- return IRQ_HANDLED;
-}
diff --git a/drivers/misc/mei/iorw.c b/drivers/misc/mei/iorw.c
deleted file mode 100644
index eb93a1b53b9..00000000000
--- a/drivers/misc/mei/iorw.c
+++ /dev/null
@@ -1,366 +0,0 @@
-/*
- *
- * Intel Management Engine Interface (Intel MEI) Linux driver
- * Copyright (c) 2003-2012, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- */
-
-
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/aio.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/ioctl.h>
-#include <linux/cdev.h>
-#include <linux/list.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/uuid.h>
-#include <linux/jiffies.h>
-#include <linux/uaccess.h>
-
-
-#include "mei_dev.h"
-#include "hw.h"
-#include <linux/mei.h>
-#include "interface.h"
-
-/**
- * mei_io_cb_free - free mei_cb_private related memory
- *
- * @cb: mei callback struct
- */
-void mei_io_cb_free(struct mei_cl_cb *cb)
-{
- if (cb == NULL)
- return;
-
- kfree(cb->request_buffer.data);
- kfree(cb->response_buffer.data);
- kfree(cb);
-}
-/**
- * mei_io_cb_init - allocate and initialize io callback
- *
- * @cl - mei client
- * @file: pointer to file structure
- *
- * returns mei_cl_cb pointer or NULL;
- */
-struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp)
-{
- struct mei_cl_cb *cb;
-
- cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL);
- if (!cb)
- return NULL;
-
- mei_io_list_init(cb);
-
- cb->file_object = fp;
- cb->cl = cl;
- cb->buf_idx = 0;
- return cb;
-}
-
-
-/**
- * mei_io_cb_alloc_req_buf - allocate request buffer
- *
- * @cb - io callback structure
- * @size: size of the buffer
- *
- * returns 0 on success
- * -EINVAL if cb is NULL
- * -ENOMEM if allocation failed
- */
-int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length)
-{
- if (!cb)
- return -EINVAL;
-
- if (length == 0)
- return 0;
-
- cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
- if (!cb->request_buffer.data)
- return -ENOMEM;
- cb->request_buffer.size = length;
- return 0;
-}
-/**
- * mei_io_cb_alloc_req_buf - allocate respose buffer
- *
- * @cb - io callback structure
- * @size: size of the buffer
- *
- * returns 0 on success
- * -EINVAL if cb is NULL
- * -ENOMEM if allocation failed
- */
-int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length)
-{
- if (!cb)
- return -EINVAL;
-
- if (length == 0)
- return 0;
-
- cb->response_buffer.data = kmalloc(length, GFP_KERNEL);
- if (!cb->response_buffer.data)
- return -ENOMEM;
- cb->response_buffer.size = length;
- return 0;
-}
-
-
-/**
- * mei_me_cl_by_id return index to me_clients for client_id
- *
- * @dev: the device structure
- * @client_id: me client id
- *
- * Locking: called under "dev->device_lock" lock
- *
- * returns index on success, -ENOENT on failure.
- */
-
-int mei_me_cl_by_id(struct mei_device *dev, u8 client_id)
-{
- int i;
- for (i = 0; i < dev->me_clients_num; i++)
- if (dev->me_clients[i].client_id == client_id)
- break;
- if (WARN_ON(dev->me_clients[i].client_id != client_id))
- return -ENOENT;
-
- if (i == dev->me_clients_num)
- return -ENOENT;
-
- return i;
-}
-
-/**
- * mei_ioctl_connect_client - the connect to fw client IOCTL function
- *
- * @dev: the device structure
- * @data: IOCTL connect data, input and output parameters
- * @file: private data of the file object
- *
- * Locking: called under "dev->device_lock" lock
- *
- * returns 0 on success, <0 on failure.
- */
-int mei_ioctl_connect_client(struct file *file,
- struct mei_connect_client_data *data)
-{
- struct mei_device *dev;
- struct mei_cl_cb *cb;
- struct mei_client *client;
- struct mei_cl *cl;
- long timeout = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT);
- int i;
- int err;
- int rets;
-
- cl = file->private_data;
- if (WARN_ON(!cl || !cl->dev))
- return -ENODEV;
-
- dev = cl->dev;
-
- dev_dbg(&dev->pdev->dev, "mei_ioctl_connect_client() Entry\n");
-
- /* buffered ioctl cb */
- cb = mei_io_cb_init(cl, file);
- if (!cb) {
- rets = -ENOMEM;
- goto end;
- }
-
- cb->fop_type = MEI_FOP_IOCTL;
-
- if (dev->dev_state != MEI_DEV_ENABLED) {
- rets = -ENODEV;
- goto end;
- }
- if (cl->state != MEI_FILE_INITIALIZING &&
- cl->state != MEI_FILE_DISCONNECTED) {
- rets = -EBUSY;
- goto end;
- }
-
- /* find ME client we're trying to connect to */
- i = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
- if (i >= 0 && !dev->me_clients[i].props.fixed_address) {
- cl->me_client_id = dev->me_clients[i].client_id;
- cl->state = MEI_FILE_CONNECTING;
- }
-
- dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
- cl->me_client_id);
- dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n",
- dev->me_clients[i].props.protocol_version);
- dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n",
- dev->me_clients[i].props.max_msg_length);
-
- /* if we're connecting to amthi client then we will use the
- * existing connection
- */
- if (uuid_le_cmp(data->in_client_uuid, mei_amthi_guid) == 0) {
- dev_dbg(&dev->pdev->dev, "FW Client is amthi\n");
- if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) {
- rets = -ENODEV;
- goto end;
- }
- clear_bit(cl->host_client_id, dev->host_clients_map);
- mei_me_cl_unlink(dev, cl);
-
- kfree(cl);
- cl = NULL;
- file->private_data = &dev->iamthif_cl;
-
- client = &data->out_client_properties;
- client->max_msg_length =
- dev->me_clients[i].props.max_msg_length;
- client->protocol_version =
- dev->me_clients[i].props.protocol_version;
- rets = dev->iamthif_cl.status;
-
- goto end;
- }
-
- if (cl->state != MEI_FILE_CONNECTING) {
- rets = -ENODEV;
- goto end;
- }
-
-
- /* prepare the output buffer */
- client = &data->out_client_properties;
- client->max_msg_length = dev->me_clients[i].props.max_msg_length;
- client->protocol_version = dev->me_clients[i].props.protocol_version;
- dev_dbg(&dev->pdev->dev, "Can connect?\n");
- if (dev->mei_host_buffer_is_empty
- && !mei_other_client_is_connecting(dev, cl)) {
- dev_dbg(&dev->pdev->dev, "Sending Connect Message\n");
- dev->mei_host_buffer_is_empty = false;
- if (mei_connect(dev, cl)) {
- dev_dbg(&dev->pdev->dev, "Sending connect message - failed\n");
- rets = -ENODEV;
- goto end;
- } else {
- dev_dbg(&dev->pdev->dev, "Sending connect message - succeeded\n");
- cl->timer_count = MEI_CONNECT_TIMEOUT;
- list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
- }
-
-
- } else {
- dev_dbg(&dev->pdev->dev, "Queuing the connect request due to device busy\n");
- dev_dbg(&dev->pdev->dev, "add connect cb to control write list.\n");
- list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
- }
- mutex_unlock(&dev->device_lock);
- err = wait_event_timeout(dev->wait_recvd_msg,
- (MEI_FILE_CONNECTED == cl->state ||
- MEI_FILE_DISCONNECTED == cl->state), timeout);
-
- mutex_lock(&dev->device_lock);
- if (MEI_FILE_CONNECTED == cl->state) {
- dev_dbg(&dev->pdev->dev, "successfully connected to FW client.\n");
- rets = cl->status;
- goto end;
- } else {
- dev_dbg(&dev->pdev->dev, "failed to connect to FW client.cl->state = %d.\n",
- cl->state);
- if (!err) {
- dev_dbg(&dev->pdev->dev,
- "wait_event_interruptible_timeout failed on client"
- " connect message fw response message.\n");
- }
- rets = -EFAULT;
-
- mei_io_list_flush(&dev->ctrl_rd_list, cl);
- mei_io_list_flush(&dev->ctrl_wr_list, cl);
- goto end;
- }
- rets = 0;
-end:
- dev_dbg(&dev->pdev->dev, "free connect cb memory.");
- mei_io_cb_free(cb);
- return rets;
-}
-
-/**
- * mei_start_read - the start read client message function.
- *
- * @dev: the device structure
- * @if_num: minor number
- * @cl: private data of the file object
- *
- * returns 0 on success, <0 on failure.
- */
-int mei_start_read(struct mei_device *dev, struct mei_cl *cl)
-{
- struct mei_cl_cb *cb;
- int rets;
- int i;
-
- if (cl->state != MEI_FILE_CONNECTED)
- return -ENODEV;
-
- if (dev->dev_state != MEI_DEV_ENABLED)
- return -ENODEV;
-
- if (cl->read_pending || cl->read_cb) {
- dev_dbg(&dev->pdev->dev, "read is pending.\n");
- return -EBUSY;
- }
- i = mei_me_cl_by_id(dev, cl->me_client_id);
- if (i < 0) {
- dev_err(&dev->pdev->dev, "no such me client %d\n",
- cl->me_client_id);
- return -ENODEV;
- }
-
- cb = mei_io_cb_init(cl, NULL);
- if (!cb)
- return -ENOMEM;
-
- rets = mei_io_cb_alloc_resp_buf(cb,
- dev->me_clients[i].props.max_msg_length);
- if (rets)
- goto err;
-
- cb->fop_type = MEI_FOP_READ;
- cl->read_cb = cb;
- if (dev->mei_host_buffer_is_empty) {
- dev->mei_host_buffer_is_empty = false;
- if (mei_send_flow_control(dev, cl)) {
- rets = -ENODEV;
- goto err;
- }
- list_add_tail(&cb->list, &dev->read_list.list);
- } else {
- list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
- }
- return rets;
-err:
- mei_io_cb_free(cb);
- return rets;
-}
-
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 43fb52ff98a..903f809b21f 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -37,79 +37,11 @@
#include <linux/interrupt.h>
#include <linux/miscdevice.h>
-#include "mei_dev.h"
#include <linux/mei.h>
-#include "interface.h"
-
-/* AMT device is a singleton on the platform */
-static struct pci_dev *mei_pdev;
-
-/* mei_pci_tbl - PCI Device ID Table */
-static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = {
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_LP)},
-
- /* required last entry */
- {0, }
-};
-
-MODULE_DEVICE_TABLE(pci, mei_pci_tbl);
-static DEFINE_MUTEX(mei_mutex);
-
-
-/**
- * find_read_list_entry - find read list entry
- *
- * @dev: device structure
- * @file: pointer to file structure
- *
- * returns cb on success, NULL on error
- */
-static struct mei_cl_cb *find_read_list_entry(
- struct mei_device *dev,
- struct mei_cl *cl)
-{
- struct mei_cl_cb *pos = NULL;
- struct mei_cl_cb *next = NULL;
-
- dev_dbg(&dev->pdev->dev, "remove read_list CB\n");
- list_for_each_entry_safe(pos, next, &dev->read_list.list, list)
- if (mei_cl_cmp_id(cl, pos->cl))
- return pos;
- return NULL;
-}
+#include "mei_dev.h"
+#include "hw-me.h"
+#include "client.h"
/**
* mei_open - the open function
@@ -121,16 +53,20 @@ static struct mei_cl_cb *find_read_list_entry(
*/
static int mei_open(struct inode *inode, struct file *file)
{
+ struct miscdevice *misc = file->private_data;
+ struct pci_dev *pdev;
struct mei_cl *cl;
struct mei_device *dev;
- unsigned long cl_id;
+
int err;
err = -ENODEV;
- if (!mei_pdev)
+ if (!misc->parent)
goto out;
- dev = pci_get_drvdata(mei_pdev);
+ pdev = container_of(misc->parent, struct pci_dev, dev);
+
+ dev = pci_get_drvdata(pdev);
if (!dev)
goto out;
@@ -153,24 +89,9 @@ static int mei_open(struct inode *inode, struct file *file)
goto out_unlock;
}
- cl_id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX);
- if (cl_id >= MEI_CLIENTS_MAX) {
- dev_err(&dev->pdev->dev, "client_id exceded %d",
- MEI_CLIENTS_MAX) ;
+ err = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
+ if (err)
goto out_unlock;
- }
-
- cl->host_client_id = cl_id;
-
- dev_dbg(&dev->pdev->dev, "client_id = %d\n", cl->host_client_id);
-
- dev->open_handle_count++;
-
- list_add_tail(&cl->link, &dev->file_list);
-
- set_bit(cl->host_client_id, dev->host_clients_map);
- cl->state = MEI_FILE_INITIALIZING;
- cl->sm_state = 0;
file->private_data = cl;
mutex_unlock(&dev->device_lock);
@@ -216,7 +137,7 @@ static int mei_release(struct inode *inode, struct file *file)
"ME client = %d\n",
cl->host_client_id,
cl->me_client_id);
- rets = mei_disconnect_host_client(dev, cl);
+ rets = mei_cl_disconnect(cl);
}
mei_cl_flush_queues(cl);
dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n",
@@ -227,12 +148,13 @@ static int mei_release(struct inode *inode, struct file *file)
clear_bit(cl->host_client_id, dev->host_clients_map);
dev->open_handle_count--;
}
- mei_me_cl_unlink(dev, cl);
+ mei_cl_unlink(cl);
+
/* free read cb */
cb = NULL;
if (cl->read_cb) {
- cb = find_read_list_entry(dev, cl);
+ cb = mei_cl_find_read_cb(cl);
/* Remove entry from read list */
if (cb)
list_del(&cb->list);
@@ -322,7 +244,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
goto out;
}
- err = mei_start_read(dev, cl);
+ err = mei_cl_read_start(cl);
if (err && err != -EBUSY) {
dev_dbg(&dev->pdev->dev,
"mei start read failure with status = %d\n", err);
@@ -393,14 +315,13 @@ copy_buffer:
goto out;
free:
- cb_pos = find_read_list_entry(dev, cl);
+ cb_pos = mei_cl_find_read_cb(cl);
/* Remove entry from read list */
if (cb_pos)
list_del(&cb_pos->list);
mei_io_cb_free(cb);
cl->reading_state = MEI_IDLE;
cl->read_cb = NULL;
- cl->read_pending = 0;
out:
dev_dbg(&dev->pdev->dev, "end mei read rets= %d\n", rets);
mutex_unlock(&dev->device_lock);
@@ -475,16 +396,15 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
/* free entry used in read */
if (cl->reading_state == MEI_READ_COMPLETE) {
*offset = 0;
- write_cb = find_read_list_entry(dev, cl);
+ write_cb = mei_cl_find_read_cb(cl);
if (write_cb) {
list_del(&write_cb->list);
mei_io_cb_free(write_cb);
write_cb = NULL;
cl->reading_state = MEI_IDLE;
cl->read_cb = NULL;
- cl->read_pending = 0;
}
- } else if (cl->reading_state == MEI_IDLE && !cl->read_pending)
+ } else if (cl->reading_state == MEI_IDLE)
*offset = 0;
@@ -519,7 +439,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
if (rets) {
dev_err(&dev->pdev->dev,
- "amthi write failed with status = %d\n", rets);
+ "amthif write failed with status = %d\n", rets);
goto err;
}
mutex_unlock(&dev->device_lock);
@@ -530,20 +450,20 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n",
cl->host_client_id, cl->me_client_id);
- rets = mei_flow_ctrl_creds(dev, cl);
+ rets = mei_cl_flow_ctrl_creds(cl);
if (rets < 0)
goto err;
- if (rets == 0 || dev->mei_host_buffer_is_empty == false) {
+ if (rets == 0 || !dev->hbuf_is_ready) {
write_cb->buf_idx = 0;
mei_hdr.msg_complete = 0;
cl->writing_state = MEI_WRITING;
goto out;
}
- dev->mei_host_buffer_is_empty = false;
- if (length > mei_hbuf_max_data(dev)) {
- mei_hdr.length = mei_hbuf_max_data(dev);
+ dev->hbuf_is_ready = false;
+ if (length > mei_hbuf_max_len(dev)) {
+ mei_hdr.length = mei_hbuf_max_len(dev);
mei_hdr.msg_complete = 0;
} else {
mei_hdr.length = length;
@@ -552,10 +472,10 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
mei_hdr.host_addr = cl->host_client_id;
mei_hdr.me_addr = cl->me_client_id;
mei_hdr.reserved = 0;
- dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n",
- *((u32 *) &mei_hdr));
- if (mei_write_message(dev, &mei_hdr,
- write_cb->request_buffer.data, mei_hdr.length)) {
+
+ dev_dbg(&dev->pdev->dev, "write " MEI_HDR_FMT "\n",
+ MEI_HDR_PRM(&mei_hdr));
+ if (mei_write_message(dev, &mei_hdr, write_cb->request_buffer.data)) {
rets = -ENODEV;
goto err;
}
@@ -564,7 +484,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
out:
if (mei_hdr.msg_complete) {
- if (mei_flow_ctrl_reduce(dev, cl)) {
+ if (mei_cl_flow_ctrl_reduce(cl)) {
rets = -ENODEV;
goto err;
}
@@ -582,6 +502,103 @@ err:
return rets;
}
+/**
+ * mei_ioctl_connect_client - the connect to fw client IOCTL function
+ *
+ * @dev: the device structure
+ * @data: IOCTL connect data, input and output parameters
+ * @file: private data of the file object
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int mei_ioctl_connect_client(struct file *file,
+ struct mei_connect_client_data *data)
+{
+ struct mei_device *dev;
+ struct mei_client *client;
+ struct mei_cl *cl;
+ int i;
+ int rets;
+
+ cl = file->private_data;
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ if (dev->dev_state != MEI_DEV_ENABLED) {
+ rets = -ENODEV;
+ goto end;
+ }
+
+ if (cl->state != MEI_FILE_INITIALIZING &&
+ cl->state != MEI_FILE_DISCONNECTED) {
+ rets = -EBUSY;
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ i = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
+ if (i >= 0 && !dev->me_clients[i].props.fixed_address) {
+ cl->me_client_id = dev->me_clients[i].client_id;
+ cl->state = MEI_FILE_CONNECTING;
+ }
+
+ dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
+ cl->me_client_id);
+ dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n",
+ dev->me_clients[i].props.protocol_version);
+ dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n",
+ dev->me_clients[i].props.max_msg_length);
+
+ /* if we're connecting to amthif client then we will use the
+ * existing connection
+ */
+ if (uuid_le_cmp(data->in_client_uuid, mei_amthif_guid) == 0) {
+ dev_dbg(&dev->pdev->dev, "FW Client is amthi\n");
+ if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ goto end;
+ }
+ clear_bit(cl->host_client_id, dev->host_clients_map);
+ mei_cl_unlink(cl);
+
+ kfree(cl);
+ cl = NULL;
+ file->private_data = &dev->iamthif_cl;
+
+ client = &data->out_client_properties;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_cl.status;
+
+ goto end;
+ }
+
+ if (cl->state != MEI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ goto end;
+ }
+
+
+ /* prepare the output buffer */
+ client = &data->out_client_properties;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ dev_dbg(&dev->pdev->dev, "Can connect?\n");
+
+
+ rets = mei_cl_connect(cl, file);
+
+end:
+ dev_dbg(&dev->pdev->dev, "free connect cb memory.");
+ return rets;
+}
+
/**
* mei_ioctl - the IOCTL function
@@ -630,6 +647,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
rets = -EFAULT;
goto out;
}
+
rets = mei_ioctl_connect_client(file, connect_data);
/* if all is ok, copying the data back to user. */
@@ -726,7 +744,6 @@ static const struct file_operations mei_fops = {
.llseek = no_llseek
};
-
/*
* Misc Device Struct
*/
@@ -736,300 +753,17 @@ static struct miscdevice mei_misc_device = {
.minor = MISC_DYNAMIC_MINOR,
};
-/**
- * mei_quirk_probe - probe for devices that doesn't valid ME interface
- * @pdev: PCI device structure
- * @ent: entry into pci_device_table
- *
- * returns true if ME Interface is valid, false otherwise
- */
-static bool mei_quirk_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
+int mei_register(struct device *dev)
{
- u32 reg;
- if (ent->device == MEI_DEV_ID_PBG_1) {
- pci_read_config_dword(pdev, 0x48, &reg);
- /* make sure that bit 9 is up and bit 10 is down */
- if ((reg & 0x600) == 0x200) {
- dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
- return false;
- }
- }
- return true;
-}
-/**
- * mei_probe - Device Initialization Routine
- *
- * @pdev: PCI device structure
- * @ent: entry in kcs_pci_tbl
- *
- * returns 0 on success, <0 on failure.
- */
-static int mei_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- struct mei_device *dev;
- int err;
-
- mutex_lock(&mei_mutex);
-
- if (!mei_quirk_probe(pdev, ent)) {
- err = -ENODEV;
- goto end;
- }
-
- if (mei_pdev) {
- err = -EEXIST;
- goto end;
- }
- /* enable pci dev */
- err = pci_enable_device(pdev);
- if (err) {
- dev_err(&pdev->dev, "failed to enable pci device.\n");
- goto end;
- }
- /* set PCI host mastering */
- pci_set_master(pdev);
- /* pci request regions for mei driver */
- err = pci_request_regions(pdev, KBUILD_MODNAME);
- if (err) {
- dev_err(&pdev->dev, "failed to get pci regions.\n");
- goto disable_device;
- }
- /* allocates and initializes the mei dev structure */
- dev = mei_device_init(pdev);
- if (!dev) {
- err = -ENOMEM;
- goto release_regions;
- }
- /* mapping IO device memory */
- dev->mem_addr = pci_iomap(pdev, 0, 0);
- if (!dev->mem_addr) {
- dev_err(&pdev->dev, "mapping I/O device memory failure.\n");
- err = -ENOMEM;
- goto free_device;
- }
- pci_enable_msi(pdev);
-
- /* request and enable interrupt */
- if (pci_dev_msi_enabled(pdev))
- err = request_threaded_irq(pdev->irq,
- NULL,
- mei_interrupt_thread_handler,
- IRQF_ONESHOT, KBUILD_MODNAME, dev);
- else
- err = request_threaded_irq(pdev->irq,
- mei_interrupt_quick_handler,
- mei_interrupt_thread_handler,
- IRQF_SHARED, KBUILD_MODNAME, dev);
-
- if (err) {
- dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
- pdev->irq);
- goto disable_msi;
- }
- INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
- INIT_WORK(&dev->init_work, mei_host_client_init);
-
- if (mei_hw_init(dev)) {
- dev_err(&pdev->dev, "init hw failure.\n");
- err = -ENODEV;
- goto release_irq;
- }
-
- err = misc_register(&mei_misc_device);
- if (err)
- goto release_irq;
-
- mei_pdev = pdev;
- pci_set_drvdata(pdev, dev);
-
-
- schedule_delayed_work(&dev->timer_work, HZ);
-
- mutex_unlock(&mei_mutex);
-
- pr_debug("initialization successful.\n");
-
- return 0;
-
-release_irq:
- /* disable interrupts */
- dev->host_hw_state = mei_hcsr_read(dev);
- mei_disable_interrupts(dev);
- flush_scheduled_work();
- free_irq(pdev->irq, dev);
-disable_msi:
- pci_disable_msi(pdev);
- pci_iounmap(pdev, dev->mem_addr);
-free_device:
- kfree(dev);
-release_regions:
- pci_release_regions(pdev);
-disable_device:
- pci_disable_device(pdev);
-end:
- mutex_unlock(&mei_mutex);
- dev_err(&pdev->dev, "initialization failed.\n");
- return err;
+ mei_misc_device.parent = dev;
+ return misc_register(&mei_misc_device);
}
-/**
- * mei_remove - Device Removal Routine
- *
- * @pdev: PCI device structure
- *
- * mei_remove is called by the PCI subsystem to alert the driver
- * that it should release a PCI device.
- */
-static void mei_remove(struct pci_dev *pdev)
+void mei_deregister(void)
{
- struct mei_device *dev;
-
- if (mei_pdev != pdev)
- return;
-
- dev = pci_get_drvdata(pdev);
- if (!dev)
- return;
-
- mutex_lock(&dev->device_lock);
-
- cancel_delayed_work(&dev->timer_work);
-
- mei_wd_stop(dev);
-
- mei_pdev = NULL;
-
- if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) {
- dev->iamthif_cl.state = MEI_FILE_DISCONNECTING;
- mei_disconnect_host_client(dev, &dev->iamthif_cl);
- }
- if (dev->wd_cl.state == MEI_FILE_CONNECTED) {
- dev->wd_cl.state = MEI_FILE_DISCONNECTING;
- mei_disconnect_host_client(dev, &dev->wd_cl);
- }
-
- /* Unregistering watchdog device */
- mei_watchdog_unregister(dev);
-
- /* remove entry if already in list */
- dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n");
- mei_me_cl_unlink(dev, &dev->wd_cl);
- mei_me_cl_unlink(dev, &dev->iamthif_cl);
-
- dev->iamthif_current_cb = NULL;
- dev->me_clients_num = 0;
-
- mutex_unlock(&dev->device_lock);
-
- flush_scheduled_work();
-
- /* disable interrupts */
- mei_disable_interrupts(dev);
-
- free_irq(pdev->irq, dev);
- pci_disable_msi(pdev);
- pci_set_drvdata(pdev, NULL);
-
- if (dev->mem_addr)
- pci_iounmap(pdev, dev->mem_addr);
-
- kfree(dev);
-
- pci_release_regions(pdev);
- pci_disable_device(pdev);
-
misc_deregister(&mei_misc_device);
-}
-#ifdef CONFIG_PM
-static int mei_pci_suspend(struct device *device)
-{
- struct pci_dev *pdev = to_pci_dev(device);
- struct mei_device *dev = pci_get_drvdata(pdev);
- int err;
-
- if (!dev)
- return -ENODEV;
- mutex_lock(&dev->device_lock);
-
- cancel_delayed_work(&dev->timer_work);
-
- /* Stop watchdog if exists */
- err = mei_wd_stop(dev);
- /* Set new mei state */
- if (dev->dev_state == MEI_DEV_ENABLED ||
- dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) {
- dev->dev_state = MEI_DEV_POWER_DOWN;
- mei_reset(dev, 0);
- }
- mutex_unlock(&dev->device_lock);
-
- free_irq(pdev->irq, dev);
- pci_disable_msi(pdev);
-
- return err;
+ mei_misc_device.parent = NULL;
}
-static int mei_pci_resume(struct device *device)
-{
- struct pci_dev *pdev = to_pci_dev(device);
- struct mei_device *dev;
- int err;
-
- dev = pci_get_drvdata(pdev);
- if (!dev)
- return -ENODEV;
-
- pci_enable_msi(pdev);
-
- /* request and enable interrupt */
- if (pci_dev_msi_enabled(pdev))
- err = request_threaded_irq(pdev->irq,
- NULL,
- mei_interrupt_thread_handler,
- IRQF_ONESHOT, KBUILD_MODNAME, dev);
- else
- err = request_threaded_irq(pdev->irq,
- mei_interrupt_quick_handler,
- mei_interrupt_thread_handler,
- IRQF_SHARED, KBUILD_MODNAME, dev);
-
- if (err) {
- dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
- pdev->irq);
- return err;
- }
-
- mutex_lock(&dev->device_lock);
- dev->dev_state = MEI_DEV_POWER_UP;
- mei_reset(dev, 1);
- mutex_unlock(&dev->device_lock);
-
- /* Start timer if stopped in suspend */
- schedule_delayed_work(&dev->timer_work, HZ);
-
- return err;
-}
-static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume);
-#define MEI_PM_OPS (&mei_pm_ops)
-#else
-#define MEI_PM_OPS NULL
-#endif /* CONFIG_PM */
-/*
- * PCI driver structure
- */
-static struct pci_driver mei_driver = {
- .name = KBUILD_MODNAME,
- .id_table = mei_pci_tbl,
- .probe = mei_probe,
- .remove = mei_remove,
- .shutdown = mei_remove,
- .driver.pm = MEI_PM_OPS,
-};
-
-module_pci_driver(mei_driver);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
MODULE_LICENSE("GPL v2");
+
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 25da04549d0..cb80166161f 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -21,7 +21,9 @@
#include <linux/watchdog.h>
#include <linux/poll.h>
#include <linux/mei.h>
+
#include "hw.h"
+#include "hw-me-regs.h"
/*
* watch dog definition
@@ -44,7 +46,7 @@
/*
* AMTHI Client UUID
*/
-extern const uuid_le mei_amthi_guid;
+extern const uuid_le mei_amthif_guid;
/*
* Watchdog Client UUID
@@ -65,12 +67,18 @@ extern const u8 mei_wd_state_independence_msg[3][4];
* Number of File descriptors/handles
* that can be opened to the driver.
*
- * Limit to 253: 256 Total Clients
+ * Limit to 255: 256 Total Clients
* minus internal client for MEI Bus Messags
- * minus internal client for AMTHI
- * minus internal client for Watchdog
*/
-#define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 3)
+#define MEI_MAX_OPEN_HANDLE_COUNT (MEI_CLIENTS_MAX - 1)
+
+/*
+ * Internal Clients Number
+ */
+#define MEI_HOST_CLIENT_ID_ANY (-1)
+#define MEI_HBM_HOST_CLIENT_ID 0 /* not used, just for documentation */
+#define MEI_WD_HOST_CLIENT_ID 1
+#define MEI_IAMTHIF_HOST_CLIENT_ID 2
/* File state */
@@ -150,6 +158,19 @@ struct mei_message_data {
unsigned char *data;
};
+/**
+ * struct mei_me_client - representation of me (fw) client
+ *
+ * @props - client properties
+ * @client_id - me client id
+ * @mei_flow_ctrl_creds - flow control credits
+ */
+struct mei_me_client {
+ struct mei_client_properties props;
+ u8 client_id;
+ u8 mei_flow_ctrl_creds;
+};
+
struct mei_cl;
@@ -178,7 +199,6 @@ struct mei_cl {
wait_queue_head_t tx_wait;
wait_queue_head_t rx_wait;
wait_queue_head_t wait;
- int read_pending;
int status;
/* ID of client connected */
u8 host_client_id;
@@ -191,10 +211,67 @@ struct mei_cl {
struct mei_cl_cb *read_cb;
};
+/** struct mei_hw_ops
+ *
+ * @host_set_ready - notify FW that host side is ready
+ * @host_is_ready - query for host readiness
+
+ * @hw_is_ready - query if hw is ready
+ * @hw_reset - reset hw
+ * @hw_config - configure hw
+
+ * @intr_clear - clear pending interrupts
+ * @intr_enable - enable interrupts
+ * @intr_disable - disable interrupts
+
+ * @hbuf_free_slots - query for write buffer empty slots
+ * @hbuf_is_ready - query if write buffer is empty
+ * @hbuf_max_len - query for write buffer max len
+
+ * @write - write a message to FW
+
+ * @rdbuf_full_slots - query how many slots are filled
+
+ * @read_hdr - get first 4 bytes (header)
+ * @read - read a buffer from the FW
+ */
+struct mei_hw_ops {
+
+ void (*host_set_ready) (struct mei_device *dev);
+ bool (*host_is_ready) (struct mei_device *dev);
+
+ bool (*hw_is_ready) (struct mei_device *dev);
+ void (*hw_reset) (struct mei_device *dev, bool enable);
+ void (*hw_config) (struct mei_device *dev);
+
+ void (*intr_clear) (struct mei_device *dev);
+ void (*intr_enable) (struct mei_device *dev);
+ void (*intr_disable) (struct mei_device *dev);
+
+ int (*hbuf_free_slots) (struct mei_device *dev);
+ bool (*hbuf_is_ready) (struct mei_device *dev);
+ size_t (*hbuf_max_len) (const struct mei_device *dev);
+
+ int (*write)(struct mei_device *dev,
+ struct mei_msg_hdr *hdr,
+ unsigned char *buf);
+
+ int (*rdbuf_full_slots)(struct mei_device *dev);
+
+ u32 (*read_hdr)(const struct mei_device *dev);
+ int (*read) (struct mei_device *dev,
+ unsigned char *buf, unsigned long len);
+};
+
/**
* struct mei_device - MEI private device struct
- * @hbuf_depth - depth of host(write) buffer
- * @wr_ext_msg - buffer for hbm control responses (set in read cycle)
+
+ * @mem_addr - mem mapped base register address
+
+ * @hbuf_depth - depth of hardware host/write buffer is slots
+ * @hbuf_is_ready - query if the host host/write buffer is ready
+ * @wr_msg - the buffer for hbm control messages
+ * @wr_ext_msg - the buffer for hbm control responses (set in read cycle)
*/
struct mei_device {
struct pci_dev *pdev; /* pointer to pci device struct */
@@ -213,24 +290,14 @@ struct mei_device {
*/
struct list_head file_list;
long open_handle_count;
- /*
- * memory of device
- */
- unsigned int mem_base;
- unsigned int mem_length;
- void __iomem *mem_addr;
+
/*
* lock for the device
*/
struct mutex device_lock; /* device lock */
struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */
bool recvd_msg;
- /*
- * hw states of host and fw(ME)
- */
- u32 host_hw_state;
- u32 me_hw_state;
- u8 hbuf_depth;
+
/*
* waiting queue for receive message from FW
*/
@@ -243,11 +310,20 @@ struct mei_device {
enum mei_dev_state dev_state;
enum mei_init_clients_states init_clients_state;
u16 init_clients_timer;
- bool need_reset;
unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */
u32 rd_msg_hdr;
- u32 wr_msg_buf[128]; /* used for control messages */
+
+ /* write buffer */
+ u8 hbuf_depth;
+ bool hbuf_is_ready;
+
+ /* used for control messages */
+ struct {
+ struct mei_msg_hdr hdr;
+ unsigned char data[128];
+ } wr_msg;
+
struct {
struct mei_msg_hdr hdr;
unsigned char data[4]; /* All HBM messages are 4 bytes */
@@ -261,7 +337,6 @@ struct mei_device {
u8 me_clients_num;
u8 me_client_presentation_num;
u8 me_client_index;
- bool mei_host_buffer_is_empty;
struct mei_cl wd_cl;
enum mei_wd_states wd_state;
@@ -289,6 +364,9 @@ struct mei_device {
bool iamthif_canceled;
struct work_struct init_work;
+
+ const struct mei_hw_ops *ops;
+ char hw[0] __aligned(sizeof(void *));
};
static inline unsigned long mei_secs_to_jiffies(unsigned long sec)
@@ -300,96 +378,28 @@ static inline unsigned long mei_secs_to_jiffies(unsigned long sec)
/*
* mei init function prototypes
*/
-struct mei_device *mei_device_init(struct pci_dev *pdev);
+void mei_device_init(struct mei_device *dev);
void mei_reset(struct mei_device *dev, int interrupts);
int mei_hw_init(struct mei_device *dev);
-int mei_task_initialize_clients(void *data);
-int mei_initialize_clients(struct mei_device *dev);
-int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl);
-void mei_allocate_me_clients_storage(struct mei_device *dev);
-
-
-int mei_me_cl_link(struct mei_device *dev, struct mei_cl *cl,
- const uuid_le *cguid, u8 host_client_id);
-void mei_me_cl_unlink(struct mei_device *dev, struct mei_cl *cl);
-int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *cuuid);
-int mei_me_cl_by_id(struct mei_device *dev, u8 client_id);
-
-/*
- * MEI IO Functions
- */
-struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp);
-void mei_io_cb_free(struct mei_cl_cb *priv_cb);
-int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length);
-int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length);
-
-
-/**
- * mei_io_list_init - Sets up a queue list.
- *
- * @list: An instance cl callback structure
- */
-static inline void mei_io_list_init(struct mei_cl_cb *list)
-{
- INIT_LIST_HEAD(&list->list);
-}
-void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl);
-
-/*
- * MEI ME Client Functions
- */
-
-struct mei_cl *mei_cl_allocate(struct mei_device *dev);
-void mei_cl_init(struct mei_cl *cl, struct mei_device *dev);
-int mei_cl_flush_queues(struct mei_cl *cl);
-/**
- * mei_cl_cmp_id - tells if file private data have same id
- *
- * @fe1: private data of 1. file object
- * @fe2: private data of 2. file object
- *
- * returns true - if ids are the same and not NULL
- */
-static inline bool mei_cl_cmp_id(const struct mei_cl *cl1,
- const struct mei_cl *cl2)
-{
- return cl1 && cl2 &&
- (cl1->host_client_id == cl2->host_client_id) &&
- (cl1->me_client_id == cl2->me_client_id);
-}
-
-
-
-/*
- * MEI Host Client Functions
- */
-void mei_host_start_message(struct mei_device *dev);
-void mei_host_enum_clients_message(struct mei_device *dev);
-int mei_host_client_enumerate(struct mei_device *dev);
-void mei_host_client_init(struct work_struct *work);
/*
* MEI interrupt functions prototype
*/
-irqreturn_t mei_interrupt_quick_handler(int irq, void *dev_id);
-irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id);
-void mei_timer(struct work_struct *work);
-/*
- * MEI input output function prototype
- */
-int mei_ioctl_connect_client(struct file *file,
- struct mei_connect_client_data *data);
+void mei_timer(struct work_struct *work);
+int mei_irq_read_handler(struct mei_device *dev,
+ struct mei_cl_cb *cmpl_list, s32 *slots);
-int mei_start_read(struct mei_device *dev, struct mei_cl *cl);
+int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list);
+void mei_irq_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb_pos);
/*
* AMTHIF - AMT Host Interface Functions
*/
void mei_amthif_reset_params(struct mei_device *dev);
-void mei_amthif_host_init(struct mei_device *dev);
+int mei_amthif_host_init(struct mei_device *dev);
int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *priv_cb);
@@ -407,9 +417,6 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
void mei_amthif_run_next_cmd(struct mei_device *dev);
-int mei_amthif_read_message(struct mei_cl_cb *complete_list,
- struct mei_device *dev, struct mei_msg_hdr *mei_hdr);
-
int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list);
@@ -418,92 +425,107 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
struct mei_device *dev, struct mei_msg_hdr *mei_hdr);
int mei_amthif_irq_read(struct mei_device *dev, s32 *slots);
+
+int mei_wd_send(struct mei_device *dev);
+int mei_wd_stop(struct mei_device *dev);
+int mei_wd_host_init(struct mei_device *dev);
/*
- * Register Access Function
+ * mei_watchdog_register - Registering watchdog interface
+ * once we got connection to the WD Client
+ * @dev - mei device
+ */
+void mei_watchdog_register(struct mei_device *dev);
+/*
+ * mei_watchdog_unregister - Unregistering watchdog interface
+ * @dev - mei device
*/
+void mei_watchdog_unregister(struct mei_device *dev);
-/**
- * mei_reg_read - Reads 32bit data from the mei device
- *
- * @dev: the device structure
- * @offset: offset from which to read the data
- *
- * returns register value (u32)
+/*
+ * Register Access Function
*/
-static inline u32 mei_reg_read(const struct mei_device *dev,
- unsigned long offset)
+
+static inline void mei_hw_config(struct mei_device *dev)
+{
+ dev->ops->hw_config(dev);
+}
+static inline void mei_hw_reset(struct mei_device *dev, bool enable)
{
- return ioread32(dev->mem_addr + offset);
+ dev->ops->hw_reset(dev, enable);
}
-/**
- * mei_reg_write - Writes 32bit data to the mei device
- *
- * @dev: the device structure
- * @offset: offset from which to write the data
- * @value: register value to write (u32)
- */
-static inline void mei_reg_write(const struct mei_device *dev,
- unsigned long offset, u32 value)
+static inline void mei_clear_interrupts(struct mei_device *dev)
{
- iowrite32(value, dev->mem_addr + offset);
+ dev->ops->intr_clear(dev);
}
-/**
- * mei_hcsr_read - Reads 32bit data from the host CSR
- *
- * @dev: the device structure
- *
- * returns the byte read.
- */
-static inline u32 mei_hcsr_read(const struct mei_device *dev)
+static inline void mei_enable_interrupts(struct mei_device *dev)
{
- return mei_reg_read(dev, H_CSR);
+ dev->ops->intr_enable(dev);
}
-/**
- * mei_mecsr_read - Reads 32bit data from the ME CSR
- *
- * @dev: the device structure
- *
- * returns ME_CSR_HA register value (u32)
- */
-static inline u32 mei_mecsr_read(const struct mei_device *dev)
+static inline void mei_disable_interrupts(struct mei_device *dev)
{
- return mei_reg_read(dev, ME_CSR_HA);
+ dev->ops->intr_disable(dev);
}
-/**
- * get_me_cb_rw - Reads 32bit data from the mei ME_CB_RW register
- *
- * @dev: the device structure
- *
- * returns ME_CB_RW register value (u32)
- */
-static inline u32 mei_mecbrw_read(const struct mei_device *dev)
+static inline void mei_host_set_ready(struct mei_device *dev)
{
- return mei_reg_read(dev, ME_CB_RW);
+ dev->ops->host_set_ready(dev);
+}
+static inline bool mei_host_is_ready(struct mei_device *dev)
+{
+ return dev->ops->host_is_ready(dev);
+}
+static inline bool mei_hw_is_ready(struct mei_device *dev)
+{
+ return dev->ops->hw_is_ready(dev);
}
+static inline bool mei_hbuf_is_ready(struct mei_device *dev)
+{
+ return dev->ops->hbuf_is_ready(dev);
+}
-/*
- * mei interface function prototypes
- */
-void mei_hcsr_set(struct mei_device *dev);
-void mei_csr_clear_his(struct mei_device *dev);
+static inline int mei_hbuf_empty_slots(struct mei_device *dev)
+{
+ return dev->ops->hbuf_free_slots(dev);
+}
+
+static inline size_t mei_hbuf_max_len(const struct mei_device *dev)
+{
+ return dev->ops->hbuf_max_len(dev);
+}
-void mei_enable_interrupts(struct mei_device *dev);
-void mei_disable_interrupts(struct mei_device *dev);
+static inline int mei_write_message(struct mei_device *dev,
+ struct mei_msg_hdr *hdr,
+ unsigned char *buf)
+{
+ return dev->ops->write(dev, hdr, buf);
+}
-static inline struct mei_msg_hdr *mei_hbm_hdr(u32 *buf, size_t length)
+static inline u32 mei_read_hdr(const struct mei_device *dev)
{
- struct mei_msg_hdr *hdr = (struct mei_msg_hdr *)buf;
- hdr->host_addr = 0;
- hdr->me_addr = 0;
- hdr->length = length;
- hdr->msg_complete = 1;
- hdr->reserved = 0;
- return hdr;
+ return dev->ops->read_hdr(dev);
}
+static inline void mei_read_slots(struct mei_device *dev,
+ unsigned char *buf, unsigned long len)
+{
+ dev->ops->read(dev, buf, len);
+}
+
+static inline int mei_count_full_read_slots(struct mei_device *dev)
+{
+ return dev->ops->rdbuf_full_slots(dev);
+}
+
+int mei_register(struct device *dev);
+void mei_deregister(void);
+
+#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d comp=%1d"
+#define MEI_HDR_PRM(hdr) \
+ (hdr)->host_addr, (hdr)->me_addr, \
+ (hdr)->length, (hdr)->msg_complete
+
#endif
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
new file mode 100644
index 00000000000..b40ec0601ab
--- /dev/null
+++ b/drivers/misc/mei/pci-me.c
@@ -0,0 +1,396 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/sched.h>
+#include <linux/uuid.h>
+#include <linux/compat.h>
+#include <linux/jiffies.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+
+#include <linux/mei.h>
+
+#include "mei_dev.h"
+#include "hw-me.h"
+#include "client.h"
+
+/* AMT device is a singleton on the platform */
+static struct pci_dev *mei_pdev;
+
+/* mei_pci_tbl - PCI Device ID Table */
+static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_LP)},
+
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, mei_pci_tbl);
+
+static DEFINE_MUTEX(mei_mutex);
+
+/**
+ * mei_quirk_probe - probe for devices that doesn't valid ME interface
+ * @pdev: PCI device structure
+ * @ent: entry into pci_device_table
+ *
+ * returns true if ME Interface is valid, false otherwise
+ */
+static bool mei_quirk_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ u32 reg;
+ if (ent->device == MEI_DEV_ID_PBG_1) {
+ pci_read_config_dword(pdev, 0x48, &reg);
+ /* make sure that bit 9 is up and bit 10 is down */
+ if ((reg & 0x600) == 0x200) {
+ dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
+ return false;
+ }
+ }
+ return true;
+}
+/**
+ * mei_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device structure
+ * @ent: entry in kcs_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int mei_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ struct mei_device *dev;
+ struct mei_me_hw *hw;
+ int err;
+
+ mutex_lock(&mei_mutex);
+
+ if (!mei_quirk_probe(pdev, ent)) {
+ err = -ENODEV;
+ goto end;
+ }
+
+ if (mei_pdev) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for mei driver */
+ err = pci_request_regions(pdev, KBUILD_MODNAME);
+ if (err) {
+ dev_err(&pdev->dev, "failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the mei dev structure */
+ dev = mei_me_dev_init(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ hw = to_me_hw(dev);
+ /* mapping IO device memory */
+ hw->mem_addr = pci_iomap(pdev, 0, 0);
+ if (!hw->mem_addr) {
+ dev_err(&pdev->dev, "mapping I/O device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ pci_enable_msi(pdev);
+
+ /* request and enable interrupt */
+ if (pci_dev_msi_enabled(pdev))
+ err = request_threaded_irq(pdev->irq,
+ NULL,
+ mei_me_irq_thread_handler,
+ IRQF_ONESHOT, KBUILD_MODNAME, dev);
+ else
+ err = request_threaded_irq(pdev->irq,
+ mei_me_irq_quick_handler,
+ mei_me_irq_thread_handler,
+ IRQF_SHARED, KBUILD_MODNAME, dev);
+
+ if (err) {
+ dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
+ pdev->irq);
+ goto disable_msi;
+ }
+
+ if (mei_hw_init(dev)) {
+ dev_err(&pdev->dev, "init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+
+ err = mei_register(&pdev->dev);
+ if (err)
+ goto release_irq;
+
+ mei_pdev = pdev;
+ pci_set_drvdata(pdev, dev);
+
+
+ schedule_delayed_work(&dev->timer_work, HZ);
+
+ mutex_unlock(&mei_mutex);
+
+ pr_debug("initialization successful.\n");
+
+ return 0;
+
+release_irq:
+ mei_disable_interrupts(dev);
+ flush_scheduled_work();
+ free_irq(pdev->irq, dev);
+disable_msi:
+ pci_disable_msi(pdev);
+ pci_iounmap(pdev, hw->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ mutex_unlock(&mei_mutex);
+ dev_err(&pdev->dev, "initialization failed.\n");
+ return err;
+}
+
+/**
+ * mei_remove - Device Removal Routine
+ *
+ * @pdev: PCI device structure
+ *
+ * mei_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void mei_remove(struct pci_dev *pdev)
+{
+ struct mei_device *dev;
+ struct mei_me_hw *hw;
+
+ if (mei_pdev != pdev)
+ return;
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return;
+
+ hw = to_me_hw(dev);
+
+ mutex_lock(&dev->device_lock);
+
+ cancel_delayed_work(&dev->timer_work);
+
+ mei_wd_stop(dev);
+
+ mei_pdev = NULL;
+
+ if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) {
+ dev->iamthif_cl.state = MEI_FILE_DISCONNECTING;
+ mei_cl_disconnect(&dev->iamthif_cl);
+ }
+ if (dev->wd_cl.state == MEI_FILE_CONNECTED) {
+ dev->wd_cl.state = MEI_FILE_DISCONNECTING;
+ mei_cl_disconnect(&dev->wd_cl);
+ }
+
+ /* Unregistering watchdog device */
+ mei_watchdog_unregister(dev);
+
+ /* remove entry if already in list */
+ dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n");
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+ mei_cl_unlink(&dev->wd_cl);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+ mei_cl_unlink(&dev->iamthif_cl);
+
+ dev->iamthif_current_cb = NULL;
+ dev->me_clients_num = 0;
+
+ mutex_unlock(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ mei_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_disable_msi(pdev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (hw->mem_addr)
+ pci_iounmap(pdev, hw->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+
+ mei_deregister();
+
+}
+#ifdef CONFIG_PM
+static int mei_pci_suspend(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev = pci_get_drvdata(pdev);
+ int err;
+
+ if (!dev)
+ return -ENODEV;
+ mutex_lock(&dev->device_lock);
+
+ cancel_delayed_work(&dev->timer_work);
+
+ /* Stop watchdog if exists */
+ err = mei_wd_stop(dev);
+ /* Set new mei state */
+ if (dev->dev_state == MEI_DEV_ENABLED ||
+ dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) {
+ dev->dev_state = MEI_DEV_POWER_DOWN;
+ mei_reset(dev, 0);
+ }
+ mutex_unlock(&dev->device_lock);
+
+ free_irq(pdev->irq, dev);
+ pci_disable_msi(pdev);
+
+ return err;
+}
+
+static int mei_pci_resume(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct mei_device *dev;
+ int err;
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ pci_enable_msi(pdev);
+
+ /* request and enable interrupt */
+ if (pci_dev_msi_enabled(pdev))
+ err = request_threaded_irq(pdev->irq,
+ NULL,
+ mei_me_irq_thread_handler,
+ IRQF_ONESHOT, KBUILD_MODNAME, dev);
+ else
+ err = request_threaded_irq(pdev->irq,
+ mei_me_irq_quick_handler,
+ mei_me_irq_thread_handler,
+ IRQF_SHARED, KBUILD_MODNAME, dev);
+
+ if (err) {
+ dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
+ pdev->irq);
+ return err;
+ }
+
+ mutex_lock(&dev->device_lock);
+ dev->dev_state = MEI_DEV_POWER_UP;
+ mei_reset(dev, 1);
+ mutex_unlock(&dev->device_lock);
+
+ /* Start timer if stopped in suspend */
+ schedule_delayed_work(&dev->timer_work, HZ);
+
+ return err;
+}
+static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume);
+#define MEI_PM_OPS (&mei_pm_ops)
+#else
+#define MEI_PM_OPS NULL
+#endif /* CONFIG_PM */
+/*
+ * PCI driver structure
+ */
+static struct pci_driver mei_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = mei_pci_tbl,
+ .probe = mei_probe,
+ .remove = mei_remove,
+ .shutdown = mei_remove,
+ .driver.pm = MEI_PM_OPS,
+};
+
+module_pci_driver(mei_driver);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c
index 9299a8c29a6..2413247fc39 100644
--- a/drivers/misc/mei/wd.c
+++ b/drivers/misc/mei/wd.c
@@ -21,11 +21,13 @@
#include <linux/sched.h>
#include <linux/watchdog.h>
-#include "mei_dev.h"
-#include "hw.h"
-#include "interface.h"
#include <linux/mei.h>
+#include "mei_dev.h"
+#include "hbm.h"
+#include "hw-me.h"
+#include "client.h"
+
static const u8 mei_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
static const u8 mei_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
@@ -62,30 +64,41 @@ static void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout)
*/
int mei_wd_host_init(struct mei_device *dev)
{
- int id;
- mei_cl_init(&dev->wd_cl, dev);
+ struct mei_cl *cl = &dev->wd_cl;
+ int i;
+ int ret;
+
+ mei_cl_init(cl, dev);
- /* look for WD client and connect to it */
- dev->wd_cl.state = MEI_FILE_DISCONNECTED;
dev->wd_timeout = MEI_WD_DEFAULT_TIMEOUT;
dev->wd_state = MEI_WD_IDLE;
- /* Connect WD ME client to the host client */
- id = mei_me_cl_link(dev, &dev->wd_cl,
- &mei_wd_guid, MEI_WD_HOST_CLIENT_ID);
- if (id < 0) {
+ /* check for valid client id */
+ i = mei_me_cl_by_uuid(dev, &mei_wd_guid);
+ if (i < 0) {
dev_info(&dev->pdev->dev, "wd: failed to find the client\n");
return -ENOENT;
}
- if (mei_connect(dev, &dev->wd_cl)) {
+ cl->me_client_id = dev->me_clients[i].client_id;
+
+ ret = mei_cl_link(cl, MEI_WD_HOST_CLIENT_ID);
+
+ if (ret < 0) {
+ dev_info(&dev->pdev->dev, "wd: failed link client\n");
+ return -ENOENT;
+ }
+
+ cl->state = MEI_FILE_CONNECTING;
+
+ if (mei_hbm_cl_connect_req(dev, cl)) {
dev_err(&dev->pdev->dev, "wd: failed to connect to the client\n");
- dev->wd_cl.state = MEI_FILE_DISCONNECTED;
- dev->wd_cl.host_client_id = 0;
+ cl->state = MEI_FILE_DISCONNECTED;
+ cl->host_client_id = 0;
return -EIO;
}
- dev->wd_cl.timer_count = MEI_CONNECT_TIMEOUT;
+ cl->timer_count = MEI_CONNECT_TIMEOUT;
return 0;
}
@@ -101,22 +114,21 @@ int mei_wd_host_init(struct mei_device *dev)
*/
int mei_wd_send(struct mei_device *dev)
{
- struct mei_msg_hdr *mei_hdr;
+ struct mei_msg_hdr hdr;
- mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
- mei_hdr->host_addr = dev->wd_cl.host_client_id;
- mei_hdr->me_addr = dev->wd_cl.me_client_id;
- mei_hdr->msg_complete = 1;
- mei_hdr->reserved = 0;
+ hdr.host_addr = dev->wd_cl.host_client_id;
+ hdr.me_addr = dev->wd_cl.me_client_id;
+ hdr.msg_complete = 1;
+ hdr.reserved = 0;
if (!memcmp(dev->wd_data, mei_start_wd_params, MEI_WD_HDR_SIZE))
- mei_hdr->length = MEI_WD_START_MSG_SIZE;
+ hdr.length = MEI_WD_START_MSG_SIZE;
else if (!memcmp(dev->wd_data, mei_stop_wd_params, MEI_WD_HDR_SIZE))
- mei_hdr->length = MEI_WD_STOP_MSG_SIZE;
+ hdr.length = MEI_WD_STOP_MSG_SIZE;
else
return -EINVAL;
- return mei_write_message(dev, mei_hdr, dev->wd_data, mei_hdr->length);
+ return mei_write_message(dev, &hdr, dev->wd_data);
}
/**
@@ -141,16 +153,16 @@ int mei_wd_stop(struct mei_device *dev)
dev->wd_state = MEI_WD_STOPPING;
- ret = mei_flow_ctrl_creds(dev, &dev->wd_cl);
+ ret = mei_cl_flow_ctrl_creds(&dev->wd_cl);
if (ret < 0)
goto out;
- if (ret && dev->mei_host_buffer_is_empty) {
+ if (ret && dev->hbuf_is_ready) {
ret = 0;
- dev->mei_host_buffer_is_empty = false;
+ dev->hbuf_is_ready = false;
if (!mei_wd_send(dev)) {
- ret = mei_flow_ctrl_reduce(dev, &dev->wd_cl);
+ ret = mei_cl_flow_ctrl_reduce(&dev->wd_cl);
if (ret)
goto out;
} else {
@@ -270,10 +282,9 @@ static int mei_wd_ops_ping(struct watchdog_device *wd_dev)
dev->wd_state = MEI_WD_RUNNING;
/* Check if we can send the ping to HW*/
- if (dev->mei_host_buffer_is_empty &&
- mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) {
+ if (dev->hbuf_is_ready && mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) {
- dev->mei_host_buffer_is_empty = false;
+ dev->hbuf_is_ready = false;
dev_dbg(&dev->pdev->dev, "wd: sending ping\n");
if (mei_wd_send(dev)) {
@@ -282,9 +293,9 @@ static int mei_wd_ops_ping(struct watchdog_device *wd_dev)
goto end;
}
- if (mei_flow_ctrl_reduce(dev, &dev->wd_cl)) {
+ if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) {
dev_err(&dev->pdev->dev,
- "wd: mei_flow_ctrl_reduce() failed.\n");
+ "wd: mei_cl_flow_ctrl_reduce() failed.\n");
ret = -EIO;
goto end;
}
diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c
index b90a2241d79..0a142801635 100644
--- a/drivers/misc/ti-st/st_core.c
+++ b/drivers/misc/ti-st/st_core.c
@@ -240,7 +240,8 @@ void st_int_recv(void *disc_data,
char *ptr;
struct st_proto_s *proto;
unsigned short payload_len = 0;
- int len = 0, type = 0;
+ int len = 0;
+ unsigned char type = 0;
unsigned char *plen;
struct st_data_s *st_gdata = (struct st_data_s *)disc_data;
unsigned long flags;
diff --git a/drivers/misc/vmw_vmci/Kconfig b/drivers/misc/vmw_vmci/Kconfig
new file mode 100644
index 00000000000..39c2ecadb27
--- /dev/null
+++ b/drivers/misc/vmw_vmci/Kconfig
@@ -0,0 +1,16 @@
+#
+# VMware VMCI device
+#
+
+config VMWARE_VMCI
+ tristate "VMware VMCI Driver"
+ depends on X86 && PCI
+ help
+ This is VMware's Virtual Machine Communication Interface. It enables
+ high-speed communication between host and guest in a virtual
+ environment via the VMCI virtual device.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called vmw_vmci.
diff --git a/drivers/misc/vmw_vmci/Makefile b/drivers/misc/vmw_vmci/Makefile
new file mode 100644
index 00000000000..4da9893c394
--- /dev/null
+++ b/drivers/misc/vmw_vmci/Makefile
@@ -0,0 +1,4 @@
+obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci.o
+vmw_vmci-y += vmci_context.o vmci_datagram.o vmci_doorbell.o \
+ vmci_driver.o vmci_event.o vmci_guest.o vmci_handle_array.o \
+ vmci_host.o vmci_queue_pair.o vmci_resource.o vmci_route.o
diff --git a/drivers/misc/vmw_vmci/vmci_context.c b/drivers/misc/vmw_vmci/vmci_context.c
new file mode 100644
index 00000000000..f866a4baecb
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_context.c
@@ -0,0 +1,1214 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/vmw_vmci_api.h>
+#include <linux/highmem.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include "vmci_queue_pair.h"
+#include "vmci_datagram.h"
+#include "vmci_doorbell.h"
+#include "vmci_context.h"
+#include "vmci_driver.h"
+#include "vmci_event.h"
+
+/*
+ * List of current VMCI contexts. Contexts can be added by
+ * vmci_ctx_create() and removed via vmci_ctx_destroy().
+ * These, along with context lookup, are protected by the
+ * list structure's lock.
+ */
+static struct {
+ struct list_head head;
+ spinlock_t lock; /* Spinlock for context list operations */
+} ctx_list = {
+ .head = LIST_HEAD_INIT(ctx_list.head),
+ .lock = __SPIN_LOCK_UNLOCKED(ctx_list.lock),
+};
+
+/* Used by contexts that did not set up notify flag pointers */
+static bool ctx_dummy_notify;
+
+static void ctx_signal_notify(struct vmci_ctx *context)
+{
+ *context->notify = true;
+}
+
+static void ctx_clear_notify(struct vmci_ctx *context)
+{
+ *context->notify = false;
+}
+
+/*
+ * If nothing requires the attention of the guest, clears both
+ * notify flag and call.
+ */
+static void ctx_clear_notify_call(struct vmci_ctx *context)
+{
+ if (context->pending_datagrams == 0 &&
+ vmci_handle_arr_get_size(context->pending_doorbell_array) == 0)
+ ctx_clear_notify(context);
+}
+
+/*
+ * Sets the context's notify flag iff datagrams are pending for this
+ * context. Called from vmci_setup_notify().
+ */
+void vmci_ctx_check_signal_notify(struct vmci_ctx *context)
+{
+ spin_lock(&context->lock);
+ if (context->pending_datagrams)
+ ctx_signal_notify(context);
+ spin_unlock(&context->lock);
+}
+
+/*
+ * Allocates and initializes a VMCI context.
+ */
+struct vmci_ctx *vmci_ctx_create(u32 cid, u32 priv_flags,
+ uintptr_t event_hnd,
+ int user_version,
+ const struct cred *cred)
+{
+ struct vmci_ctx *context;
+ int error;
+
+ if (cid == VMCI_INVALID_ID) {
+ pr_devel("Invalid context ID for VMCI context\n");
+ error = -EINVAL;
+ goto err_out;
+ }
+
+ if (priv_flags & ~VMCI_PRIVILEGE_ALL_FLAGS) {
+ pr_devel("Invalid flag (flags=0x%x) for VMCI context\n",
+ priv_flags);
+ error = -EINVAL;
+ goto err_out;
+ }
+
+ if (user_version == 0) {
+ pr_devel("Invalid suer_version %d\n", user_version);
+ error = -EINVAL;
+ goto err_out;
+ }
+
+ context = kzalloc(sizeof(*context), GFP_KERNEL);
+ if (!context) {
+ pr_warn("Failed to allocate memory for VMCI context\n");
+ error = -EINVAL;
+ goto err_out;
+ }
+
+ kref_init(&context->kref);
+ spin_lock_init(&context->lock);
+ INIT_LIST_HEAD(&context->list_item);
+ INIT_LIST_HEAD(&context->datagram_queue);
+ INIT_LIST_HEAD(&context->notifier_list);
+
+ /* Initialize host-specific VMCI context. */
+ init_waitqueue_head(&context->host_context.wait_queue);
+
+ context->queue_pair_array = vmci_handle_arr_create(0);
+ if (!context->queue_pair_array) {
+ error = -ENOMEM;
+ goto err_free_ctx;
+ }
+
+ context->doorbell_array = vmci_handle_arr_create(0);
+ if (!context->doorbell_array) {
+ error = -ENOMEM;
+ goto err_free_qp_array;
+ }
+
+ context->pending_doorbell_array = vmci_handle_arr_create(0);
+ if (!context->pending_doorbell_array) {
+ error = -ENOMEM;
+ goto err_free_db_array;
+ }
+
+ context->user_version = user_version;
+
+ context->priv_flags = priv_flags;
+
+ if (cred)
+ context->cred = get_cred(cred);
+
+ context->notify = &ctx_dummy_notify;
+ context->notify_page = NULL;
+
+ /*
+ * If we collide with an existing context we generate a new
+ * and use it instead. The VMX will determine if regeneration
+ * is okay. Since there isn't 4B - 16 VMs running on a given
+ * host, the below loop will terminate.
+ */
+ spin_lock(&ctx_list.lock);
+
+ while (vmci_ctx_exists(cid)) {
+ /* We reserve the lowest 16 ids for fixed contexts. */
+ cid = max(cid, VMCI_RESERVED_CID_LIMIT - 1) + 1;
+ if (cid == VMCI_INVALID_ID)
+ cid = VMCI_RESERVED_CID_LIMIT;
+ }
+ context->cid = cid;
+
+ list_add_tail_rcu(&context->list_item, &ctx_list.head);
+ spin_unlock(&ctx_list.lock);
+
+ return context;
+
+ err_free_db_array:
+ vmci_handle_arr_destroy(context->doorbell_array);
+ err_free_qp_array:
+ vmci_handle_arr_destroy(context->queue_pair_array);
+ err_free_ctx:
+ kfree(context);
+ err_out:
+ return ERR_PTR(error);
+}
+
+/*
+ * Destroy VMCI context.
+ */
+void vmci_ctx_destroy(struct vmci_ctx *context)
+{
+ spin_lock(&ctx_list.lock);
+ list_del_rcu(&context->list_item);
+ spin_unlock(&ctx_list.lock);
+ synchronize_rcu();
+
+ vmci_ctx_put(context);
+}
+
+/*
+ * Fire notification for all contexts interested in given cid.
+ */
+static int ctx_fire_notification(u32 context_id, u32 priv_flags)
+{
+ u32 i, array_size;
+ struct vmci_ctx *sub_ctx;
+ struct vmci_handle_arr *subscriber_array;
+ struct vmci_handle context_handle =
+ vmci_make_handle(context_id, VMCI_EVENT_HANDLER);
+
+ /*
+ * We create an array to hold the subscribers we find when
+ * scanning through all contexts.
+ */
+ subscriber_array = vmci_handle_arr_create(0);
+ if (subscriber_array == NULL)
+ return VMCI_ERROR_NO_MEM;
+
+ /*
+ * Scan all contexts to find who is interested in being
+ * notified about given contextID.
+ */
+ rcu_read_lock();
+ list_for_each_entry_rcu(sub_ctx, &ctx_list.head, list_item) {
+ struct vmci_handle_list *node;
+
+ /*
+ * We only deliver notifications of the removal of
+ * contexts, if the two contexts are allowed to
+ * interact.
+ */
+ if (vmci_deny_interaction(priv_flags, sub_ctx->priv_flags))
+ continue;
+
+ list_for_each_entry_rcu(node, &sub_ctx->notifier_list, node) {
+ if (!vmci_handle_is_equal(node->handle, context_handle))
+ continue;
+
+ vmci_handle_arr_append_entry(&subscriber_array,
+ vmci_make_handle(sub_ctx->cid,
+ VMCI_EVENT_HANDLER));
+ }
+ }
+ rcu_read_unlock();
+
+ /* Fire event to all subscribers. */
+ array_size = vmci_handle_arr_get_size(subscriber_array);
+ for (i = 0; i < array_size; i++) {
+ int result;
+ struct vmci_event_ctx ev;
+
+ ev.msg.hdr.dst = vmci_handle_arr_get_entry(subscriber_array, i);
+ ev.msg.hdr.src = vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
+ VMCI_CONTEXT_RESOURCE_ID);
+ ev.msg.hdr.payload_size = sizeof(ev) - sizeof(ev.msg.hdr);
+ ev.msg.event_data.event = VMCI_EVENT_CTX_REMOVED;
+ ev.payload.context_id = context_id;
+
+ result = vmci_datagram_dispatch(VMCI_HYPERVISOR_CONTEXT_ID,
+ &ev.msg.hdr, false);
+ if (result < VMCI_SUCCESS) {
+ pr_devel("Failed to enqueue event datagram (type=%d) for context (ID=0x%x)\n",
+ ev.msg.event_data.event,
+ ev.msg.hdr.dst.context);
+ /* We continue to enqueue on next subscriber. */
+ }
+ }
+ vmci_handle_arr_destroy(subscriber_array);
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Returns the current number of pending datagrams. The call may
+ * also serve as a synchronization point for the datagram queue,
+ * as no enqueue operations can occur concurrently.
+ */
+int vmci_ctx_pending_datagrams(u32 cid, u32 *pending)
+{
+ struct vmci_ctx *context;
+
+ context = vmci_ctx_get(cid);
+ if (context == NULL)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ spin_lock(&context->lock);
+ if (pending)
+ *pending = context->pending_datagrams;
+ spin_unlock(&context->lock);
+ vmci_ctx_put(context);
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Queues a VMCI datagram for the appropriate target VM context.
+ */
+int vmci_ctx_enqueue_datagram(u32 cid, struct vmci_datagram *dg)
+{
+ struct vmci_datagram_queue_entry *dq_entry;
+ struct vmci_ctx *context;
+ struct vmci_handle dg_src;
+ size_t vmci_dg_size;
+
+ vmci_dg_size = VMCI_DG_SIZE(dg);
+ if (vmci_dg_size > VMCI_MAX_DG_SIZE) {
+ pr_devel("Datagram too large (bytes=%Zu)\n", vmci_dg_size);
+ return VMCI_ERROR_INVALID_ARGS;
+ }
+
+ /* Get the target VM's VMCI context. */
+ context = vmci_ctx_get(cid);
+ if (!context) {
+ pr_devel("Invalid context (ID=0x%x)\n", cid);
+ return VMCI_ERROR_INVALID_ARGS;
+ }
+
+ /* Allocate guest call entry and add it to the target VM's queue. */
+ dq_entry = kmalloc(sizeof(*dq_entry), GFP_KERNEL);
+ if (dq_entry == NULL) {
+ pr_warn("Failed to allocate memory for datagram\n");
+ vmci_ctx_put(context);
+ return VMCI_ERROR_NO_MEM;
+ }
+ dq_entry->dg = dg;
+ dq_entry->dg_size = vmci_dg_size;
+ dg_src = dg->src;
+ INIT_LIST_HEAD(&dq_entry->list_item);
+
+ spin_lock(&context->lock);
+
+ /*
+ * We put a higher limit on datagrams from the hypervisor. If
+ * the pending datagram is not from hypervisor, then we check
+ * if enqueueing it would exceed the
+ * VMCI_MAX_DATAGRAM_QUEUE_SIZE limit on the destination. If
+ * the pending datagram is from hypervisor, we allow it to be
+ * queued at the destination side provided we don't reach the
+ * VMCI_MAX_DATAGRAM_AND_EVENT_QUEUE_SIZE limit.
+ */
+ if (context->datagram_queue_size + vmci_dg_size >=
+ VMCI_MAX_DATAGRAM_QUEUE_SIZE &&
+ (!vmci_handle_is_equal(dg_src,
+ vmci_make_handle
+ (VMCI_HYPERVISOR_CONTEXT_ID,
+ VMCI_CONTEXT_RESOURCE_ID)) ||
+ context->datagram_queue_size + vmci_dg_size >=
+ VMCI_MAX_DATAGRAM_AND_EVENT_QUEUE_SIZE)) {
+ spin_unlock(&context->lock);
+ vmci_ctx_put(context);
+ kfree(dq_entry);
+ pr_devel("Context (ID=0x%x) receive queue is full\n", cid);
+ return VMCI_ERROR_NO_RESOURCES;
+ }
+
+ list_add(&dq_entry->list_item, &context->datagram_queue);
+ context->pending_datagrams++;
+ context->datagram_queue_size += vmci_dg_size;
+ ctx_signal_notify(context);
+ wake_up(&context->host_context.wait_queue);
+ spin_unlock(&context->lock);
+ vmci_ctx_put(context);
+
+ return vmci_dg_size;
+}
+
+/*
+ * Verifies whether a context with the specified context ID exists.
+ * FIXME: utility is dubious as no decisions can be reliably made
+ * using this data as context can appear and disappear at any time.
+ */
+bool vmci_ctx_exists(u32 cid)
+{
+ struct vmci_ctx *context;
+ bool exists = false;
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(context, &ctx_list.head, list_item) {
+ if (context->cid == cid) {
+ exists = true;
+ break;
+ }
+ }
+
+ rcu_read_unlock();
+ return exists;
+}
+
+/*
+ * Retrieves VMCI context corresponding to the given cid.
+ */
+struct vmci_ctx *vmci_ctx_get(u32 cid)
+{
+ struct vmci_ctx *c, *context = NULL;
+
+ if (cid == VMCI_INVALID_ID)
+ return NULL;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(c, &ctx_list.head, list_item) {
+ if (c->cid == cid) {
+ /*
+ * The context owner drops its own reference to the
+ * context only after removing it from the list and
+ * waiting for RCU grace period to expire. This
+ * means that we are not about to increase the
+ * reference count of something that is in the
+ * process of being destroyed.
+ */
+ context = c;
+ kref_get(&context->kref);
+ break;
+ }
+ }
+ rcu_read_unlock();
+
+ return context;
+}
+
+/*
+ * Deallocates all parts of a context data structure. This
+ * function doesn't lock the context, because it assumes that
+ * the caller was holding the last reference to context.
+ */
+static void ctx_free_ctx(struct kref *kref)
+{
+ struct vmci_ctx *context = container_of(kref, struct vmci_ctx, kref);
+ struct vmci_datagram_queue_entry *dq_entry, *dq_entry_tmp;
+ struct vmci_handle temp_handle;
+ struct vmci_handle_list *notifier, *tmp;
+
+ /*
+ * Fire event to all contexts interested in knowing this
+ * context is dying.
+ */
+ ctx_fire_notification(context->cid, context->priv_flags);
+
+ /*
+ * Cleanup all queue pair resources attached to context. If
+ * the VM dies without cleaning up, this code will make sure
+ * that no resources are leaked.
+ */
+ temp_handle = vmci_handle_arr_get_entry(context->queue_pair_array, 0);
+ while (!vmci_handle_is_equal(temp_handle, VMCI_INVALID_HANDLE)) {
+ if (vmci_qp_broker_detach(temp_handle,
+ context) < VMCI_SUCCESS) {
+ /*
+ * When vmci_qp_broker_detach() succeeds it
+ * removes the handle from the array. If
+ * detach fails, we must remove the handle
+ * ourselves.
+ */
+ vmci_handle_arr_remove_entry(context->queue_pair_array,
+ temp_handle);
+ }
+ temp_handle =
+ vmci_handle_arr_get_entry(context->queue_pair_array, 0);
+ }
+
+ /*
+ * It is fine to destroy this without locking the callQueue, as
+ * this is the only thread having a reference to the context.
+ */
+ list_for_each_entry_safe(dq_entry, dq_entry_tmp,
+ &context->datagram_queue, list_item) {
+ WARN_ON(dq_entry->dg_size != VMCI_DG_SIZE(dq_entry->dg));
+ list_del(&dq_entry->list_item);
+ kfree(dq_entry->dg);
+ kfree(dq_entry);
+ }
+
+ list_for_each_entry_safe(notifier, tmp,
+ &context->notifier_list, node) {
+ list_del(&notifier->node);
+ kfree(notifier);
+ }
+
+ vmci_handle_arr_destroy(context->queue_pair_array);
+ vmci_handle_arr_destroy(context->doorbell_array);
+ vmci_handle_arr_destroy(context->pending_doorbell_array);
+ vmci_ctx_unset_notify(context);
+ if (context->cred)
+ put_cred(context->cred);
+ kfree(context);
+}
+
+/*
+ * Drops reference to VMCI context. If this is the last reference to
+ * the context it will be deallocated. A context is created with
+ * a reference count of one, and on destroy, it is removed from
+ * the context list before its reference count is decremented. Thus,
+ * if we reach zero, we are sure that nobody else are about to increment
+ * it (they need the entry in the context list for that), and so there
+ * is no need for locking.
+ */
+void vmci_ctx_put(struct vmci_ctx *context)
+{
+ kref_put(&context->kref, ctx_free_ctx);
+}
+
+/*
+ * Dequeues the next datagram and returns it to caller.
+ * The caller passes in a pointer to the max size datagram
+ * it can handle and the datagram is only unqueued if the
+ * size is less than max_size. If larger max_size is set to
+ * the size of the datagram to give the caller a chance to
+ * set up a larger buffer for the guestcall.
+ */
+int vmci_ctx_dequeue_datagram(struct vmci_ctx *context,
+ size_t *max_size,
+ struct vmci_datagram **dg)
+{
+ struct vmci_datagram_queue_entry *dq_entry;
+ struct list_head *list_item;
+ int rv;
+
+ /* Dequeue the next datagram entry. */
+ spin_lock(&context->lock);
+ if (context->pending_datagrams == 0) {
+ ctx_clear_notify_call(context);
+ spin_unlock(&context->lock);
+ pr_devel("No datagrams pending\n");
+ return VMCI_ERROR_NO_MORE_DATAGRAMS;
+ }
+
+ list_item = context->datagram_queue.next;
+
+ dq_entry =
+ list_entry(list_item, struct vmci_datagram_queue_entry, list_item);
+
+ /* Check size of caller's buffer. */
+ if (*max_size < dq_entry->dg_size) {
+ *max_size = dq_entry->dg_size;
+ spin_unlock(&context->lock);
+ pr_devel("Caller's buffer should be at least (size=%u bytes)\n",
+ (u32) *max_size);
+ return VMCI_ERROR_NO_MEM;
+ }
+
+ list_del(list_item);
+ context->pending_datagrams--;
+ context->datagram_queue_size -= dq_entry->dg_size;
+ if (context->pending_datagrams == 0) {
+ ctx_clear_notify_call(context);
+ rv = VMCI_SUCCESS;
+ } else {
+ /*
+ * Return the size of the next datagram.
+ */
+ struct vmci_datagram_queue_entry *next_entry;
+
+ list_item = context->datagram_queue.next;
+ next_entry =
+ list_entry(list_item, struct vmci_datagram_queue_entry,
+ list_item);
+
+ /*
+ * The following size_t -> int truncation is fine as
+ * the maximum size of a (routable) datagram is 68KB.
+ */
+ rv = (int)next_entry->dg_size;
+ }
+ spin_unlock(&context->lock);
+
+ /* Caller must free datagram. */
+ *dg = dq_entry->dg;
+ dq_entry->dg = NULL;
+ kfree(dq_entry);
+
+ return rv;
+}
+
+/*
+ * Reverts actions set up by vmci_setup_notify(). Unmaps and unlocks the
+ * page mapped/locked by vmci_setup_notify().
+ */
+void vmci_ctx_unset_notify(struct vmci_ctx *context)
+{
+ struct page *notify_page;
+
+ spin_lock(&context->lock);
+
+ notify_page = context->notify_page;
+ context->notify = &ctx_dummy_notify;
+ context->notify_page = NULL;
+
+ spin_unlock(&context->lock);
+
+ if (notify_page) {
+ kunmap(notify_page);
+ put_page(notify_page);
+ }
+}
+
+/*
+ * Add remote_cid to list of contexts current contexts wants
+ * notifications from/about.
+ */
+int vmci_ctx_add_notification(u32 context_id, u32 remote_cid)
+{
+ struct vmci_ctx *context;
+ struct vmci_handle_list *notifier, *n;
+ int result;
+ bool exists = false;
+
+ context = vmci_ctx_get(context_id);
+ if (!context)
+ return VMCI_ERROR_NOT_FOUND;
+
+ if (VMCI_CONTEXT_IS_VM(context_id) && VMCI_CONTEXT_IS_VM(remote_cid)) {
+ pr_devel("Context removed notifications for other VMs not supported (src=0x%x, remote=0x%x)\n",
+ context_id, remote_cid);
+ result = VMCI_ERROR_DST_UNREACHABLE;
+ goto out;
+ }
+
+ if (context->priv_flags & VMCI_PRIVILEGE_FLAG_RESTRICTED) {
+ result = VMCI_ERROR_NO_ACCESS;
+ goto out;
+ }
+
+ notifier = kmalloc(sizeof(struct vmci_handle_list), GFP_KERNEL);
+ if (!notifier) {
+ result = VMCI_ERROR_NO_MEM;
+ goto out;
+ }
+
+ INIT_LIST_HEAD(&notifier->node);
+ notifier->handle = vmci_make_handle(remote_cid, VMCI_EVENT_HANDLER);
+
+ spin_lock(&context->lock);
+
+ list_for_each_entry(n, &context->notifier_list, node) {
+ if (vmci_handle_is_equal(n->handle, notifier->handle)) {
+ exists = true;
+ break;
+ }
+ }
+
+ if (exists) {
+ kfree(notifier);
+ result = VMCI_ERROR_ALREADY_EXISTS;
+ } else {
+ list_add_tail_rcu(&notifier->node, &context->notifier_list);
+ context->n_notifiers++;
+ result = VMCI_SUCCESS;
+ }
+
+ spin_unlock(&context->lock);
+
+ out:
+ vmci_ctx_put(context);
+ return result;
+}
+
+/*
+ * Remove remote_cid from current context's list of contexts it is
+ * interested in getting notifications from/about.
+ */
+int vmci_ctx_remove_notification(u32 context_id, u32 remote_cid)
+{
+ struct vmci_ctx *context;
+ struct vmci_handle_list *notifier, *tmp;
+ struct vmci_handle handle;
+ bool found = false;
+
+ context = vmci_ctx_get(context_id);
+ if (!context)
+ return VMCI_ERROR_NOT_FOUND;
+
+ handle = vmci_make_handle(remote_cid, VMCI_EVENT_HANDLER);
+
+ spin_lock(&context->lock);
+ list_for_each_entry_safe(notifier, tmp,
+ &context->notifier_list, node) {
+ if (vmci_handle_is_equal(notifier->handle, handle)) {
+ list_del_rcu(&notifier->node);
+ context->n_notifiers--;
+ found = true;
+ break;
+ }
+ }
+ spin_unlock(&context->lock);
+
+ if (found) {
+ synchronize_rcu();
+ kfree(notifier);
+ }
+
+ vmci_ctx_put(context);
+
+ return found ? VMCI_SUCCESS : VMCI_ERROR_NOT_FOUND;
+}
+
+static int vmci_ctx_get_chkpt_notifiers(struct vmci_ctx *context,
+ u32 *buf_size, void **pbuf)
+{
+ u32 *notifiers;
+ size_t data_size;
+ struct vmci_handle_list *entry;
+ int i = 0;
+
+ if (context->n_notifiers == 0) {
+ *buf_size = 0;
+ *pbuf = NULL;
+ return VMCI_SUCCESS;
+ }
+
+ data_size = context->n_notifiers * sizeof(*notifiers);
+ if (*buf_size < data_size) {
+ *buf_size = data_size;
+ return VMCI_ERROR_MORE_DATA;
+ }
+
+ notifiers = kmalloc(data_size, GFP_ATOMIC); /* FIXME: want GFP_KERNEL */
+ if (!notifiers)
+ return VMCI_ERROR_NO_MEM;
+
+ list_for_each_entry(entry, &context->notifier_list, node)
+ notifiers[i++] = entry->handle.context;
+
+ *buf_size = data_size;
+ *pbuf = notifiers;
+ return VMCI_SUCCESS;
+}
+
+static int vmci_ctx_get_chkpt_doorbells(struct vmci_ctx *context,
+ u32 *buf_size, void **pbuf)
+{
+ struct dbell_cpt_state *dbells;
+ size_t n_doorbells;
+ int i;
+
+ n_doorbells = vmci_handle_arr_get_size(context->doorbell_array);
+ if (n_doorbells > 0) {
+ size_t data_size = n_doorbells * sizeof(*dbells);
+ if (*buf_size < data_size) {
+ *buf_size = data_size;
+ return VMCI_ERROR_MORE_DATA;
+ }
+
+ dbells = kmalloc(data_size, GFP_ATOMIC);
+ if (!dbells)
+ return VMCI_ERROR_NO_MEM;
+
+ for (i = 0; i < n_doorbells; i++)
+ dbells[i].handle = vmci_handle_arr_get_entry(
+ context->doorbell_array, i);
+
+ *buf_size = data_size;
+ *pbuf = dbells;
+ } else {
+ *buf_size = 0;
+ *pbuf = NULL;
+ }
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Get current context's checkpoint state of given type.
+ */
+int vmci_ctx_get_chkpt_state(u32 context_id,
+ u32 cpt_type,
+ u32 *buf_size,
+ void **pbuf)
+{
+ struct vmci_ctx *context;
+ int result;
+
+ context = vmci_ctx_get(context_id);
+ if (!context)
+ return VMCI_ERROR_NOT_FOUND;
+
+ spin_lock(&context->lock);
+
+ switch (cpt_type) {
+ case VMCI_NOTIFICATION_CPT_STATE:
+ result = vmci_ctx_get_chkpt_notifiers(context, buf_size, pbuf);
+ break;
+
+ case VMCI_WELLKNOWN_CPT_STATE:
+ /*
+ * For compatibility with VMX'en with VM to VM communication, we
+ * always return zero wellknown handles.
+ */
+
+ *buf_size = 0;
+ *pbuf = NULL;
+ result = VMCI_SUCCESS;
+ break;
+
+ case VMCI_DOORBELL_CPT_STATE:
+ result = vmci_ctx_get_chkpt_doorbells(context, buf_size, pbuf);
+ break;
+
+ default:
+ pr_devel("Invalid cpt state (type=%d)\n", cpt_type);
+ result = VMCI_ERROR_INVALID_ARGS;
+ break;
+ }
+
+ spin_unlock(&context->lock);
+ vmci_ctx_put(context);
+
+ return result;
+}
+
+/*
+ * Set current context's checkpoint state of given type.
+ */
+int vmci_ctx_set_chkpt_state(u32 context_id,
+ u32 cpt_type,
+ u32 buf_size,
+ void *cpt_buf)
+{
+ u32 i;
+ u32 current_id;
+ int result = VMCI_SUCCESS;
+ u32 num_ids = buf_size / sizeof(u32);
+
+ if (cpt_type == VMCI_WELLKNOWN_CPT_STATE && num_ids > 0) {
+ /*
+ * We would end up here if VMX with VM to VM communication
+ * attempts to restore a checkpoint with wellknown handles.
+ */
+ pr_warn("Attempt to restore checkpoint with obsolete wellknown handles\n");
+ return VMCI_ERROR_OBSOLETE;
+ }
+
+ if (cpt_type != VMCI_NOTIFICATION_CPT_STATE) {
+ pr_devel("Invalid cpt state (type=%d)\n", cpt_type);
+ return VMCI_ERROR_INVALID_ARGS;
+ }
+
+ for (i = 0; i < num_ids && result == VMCI_SUCCESS; i++) {
+ current_id = ((u32 *)cpt_buf)[i];
+ result = vmci_ctx_add_notification(context_id, current_id);
+ if (result != VMCI_SUCCESS)
+ break;
+ }
+ if (result != VMCI_SUCCESS)
+ pr_devel("Failed to set cpt state (type=%d) (error=%d)\n",
+ cpt_type, result);
+
+ return result;
+}
+
+/*
+ * Retrieves the specified context's pending notifications in the
+ * form of a handle array. The handle arrays returned are the
+ * actual data - not a copy and should not be modified by the
+ * caller. They must be released using
+ * vmci_ctx_rcv_notifications_release.
+ */
+int vmci_ctx_rcv_notifications_get(u32 context_id,
+ struct vmci_handle_arr **db_handle_array,
+ struct vmci_handle_arr **qp_handle_array)
+{
+ struct vmci_ctx *context;
+ int result = VMCI_SUCCESS;
+
+ context = vmci_ctx_get(context_id);
+ if (context == NULL)
+ return VMCI_ERROR_NOT_FOUND;
+
+ spin_lock(&context->lock);
+
+ *db_handle_array = context->pending_doorbell_array;
+ context->pending_doorbell_array = vmci_handle_arr_create(0);
+ if (!context->pending_doorbell_array) {
+ context->pending_doorbell_array = *db_handle_array;
+ *db_handle_array = NULL;
+ result = VMCI_ERROR_NO_MEM;
+ }
+ *qp_handle_array = NULL;
+
+ spin_unlock(&context->lock);
+ vmci_ctx_put(context);
+
+ return result;
+}
+
+/*
+ * Releases handle arrays with pending notifications previously
+ * retrieved using vmci_ctx_rcv_notifications_get. If the
+ * notifications were not successfully handed over to the guest,
+ * success must be false.
+ */
+void vmci_ctx_rcv_notifications_release(u32 context_id,
+ struct vmci_handle_arr *db_handle_array,
+ struct vmci_handle_arr *qp_handle_array,
+ bool success)
+{
+ struct vmci_ctx *context = vmci_ctx_get(context_id);
+
+ spin_lock(&context->lock);
+ if (!success) {
+ struct vmci_handle handle;
+
+ /*
+ * New notifications may have been added while we were not
+ * holding the context lock, so we transfer any new pending
+ * doorbell notifications to the old array, and reinstate the
+ * old array.
+ */
+
+ handle = vmci_handle_arr_remove_tail(
+ context->pending_doorbell_array);
+ while (!vmci_handle_is_invalid(handle)) {
+ if (!vmci_handle_arr_has_entry(db_handle_array,
+ handle)) {
+ vmci_handle_arr_append_entry(
+ &db_handle_array, handle);
+ }
+ handle = vmci_handle_arr_remove_tail(
+ context->pending_doorbell_array);
+ }
+ vmci_handle_arr_destroy(context->pending_doorbell_array);
+ context->pending_doorbell_array = db_handle_array;
+ db_handle_array = NULL;
+ } else {
+ ctx_clear_notify_call(context);
+ }
+ spin_unlock(&context->lock);
+ vmci_ctx_put(context);
+
+ if (db_handle_array)
+ vmci_handle_arr_destroy(db_handle_array);
+
+ if (qp_handle_array)
+ vmci_handle_arr_destroy(qp_handle_array);
+}
+
+/*
+ * Registers that a new doorbell handle has been allocated by the
+ * context. Only doorbell handles registered can be notified.
+ */
+int vmci_ctx_dbell_create(u32 context_id, struct vmci_handle handle)
+{
+ struct vmci_ctx *context;
+ int result;
+
+ if (context_id == VMCI_INVALID_ID || vmci_handle_is_invalid(handle))
+ return VMCI_ERROR_INVALID_ARGS;
+
+ context = vmci_ctx_get(context_id);
+ if (context == NULL)
+ return VMCI_ERROR_NOT_FOUND;
+
+ spin_lock(&context->lock);
+ if (!vmci_handle_arr_has_entry(context->doorbell_array, handle)) {
+ vmci_handle_arr_append_entry(&context->doorbell_array, handle);
+ result = VMCI_SUCCESS;
+ } else {
+ result = VMCI_ERROR_DUPLICATE_ENTRY;
+ }
+
+ spin_unlock(&context->lock);
+ vmci_ctx_put(context);
+
+ return result;
+}
+
+/*
+ * Unregisters a doorbell handle that was previously registered
+ * with vmci_ctx_dbell_create.
+ */
+int vmci_ctx_dbell_destroy(u32 context_id, struct vmci_handle handle)
+{
+ struct vmci_ctx *context;
+ struct vmci_handle removed_handle;
+
+ if (context_id == VMCI_INVALID_ID || vmci_handle_is_invalid(handle))
+ return VMCI_ERROR_INVALID_ARGS;
+
+ context = vmci_ctx_get(context_id);
+ if (context == NULL)
+ return VMCI_ERROR_NOT_FOUND;
+
+ spin_lock(&context->lock);
+ removed_handle =
+ vmci_handle_arr_remove_entry(context->doorbell_array, handle);
+ vmci_handle_arr_remove_entry(context->pending_doorbell_array, handle);
+ spin_unlock(&context->lock);
+
+ vmci_ctx_put(context);
+
+ return vmci_handle_is_invalid(removed_handle) ?
+ VMCI_ERROR_NOT_FOUND : VMCI_SUCCESS;
+}
+
+/*
+ * Unregisters all doorbell handles that were previously
+ * registered with vmci_ctx_dbell_create.
+ */
+int vmci_ctx_dbell_destroy_all(u32 context_id)
+{
+ struct vmci_ctx *context;
+ struct vmci_handle handle;
+
+ if (context_id == VMCI_INVALID_ID)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ context = vmci_ctx_get(context_id);
+ if (context == NULL)
+ return VMCI_ERROR_NOT_FOUND;
+
+ spin_lock(&context->lock);
+ do {
+ struct vmci_handle_arr *arr = context->doorbell_array;
+ handle = vmci_handle_arr_remove_tail(arr);
+ } while (!vmci_handle_is_invalid(handle));
+ do {
+ struct vmci_handle_arr *arr = context->pending_doorbell_array;
+ handle = vmci_handle_arr_remove_tail(arr);
+ } while (!vmci_handle_is_invalid(handle));
+ spin_unlock(&context->lock);
+
+ vmci_ctx_put(context);
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Registers a notification of a doorbell handle initiated by the
+ * specified source context. The notification of doorbells are
+ * subject to the same isolation rules as datagram delivery. To
+ * allow host side senders of notifications a finer granularity
+ * of sender rights than those assigned to the sending context
+ * itself, the host context is required to specify a different
+ * set of privilege flags that will override the privileges of
+ * the source context.
+ */
+int vmci_ctx_notify_dbell(u32 src_cid,
+ struct vmci_handle handle,
+ u32 src_priv_flags)
+{
+ struct vmci_ctx *dst_context;
+ int result;
+
+ if (vmci_handle_is_invalid(handle))
+ return VMCI_ERROR_INVALID_ARGS;
+
+ /* Get the target VM's VMCI context. */
+ dst_context = vmci_ctx_get(handle.context);
+ if (!dst_context) {
+ pr_devel("Invalid context (ID=0x%x)\n", handle.context);
+ return VMCI_ERROR_NOT_FOUND;
+ }
+
+ if (src_cid != handle.context) {
+ u32 dst_priv_flags;
+
+ if (VMCI_CONTEXT_IS_VM(src_cid) &&
+ VMCI_CONTEXT_IS_VM(handle.context)) {
+ pr_devel("Doorbell notification from VM to VM not supported (src=0x%x, dst=0x%x)\n",
+ src_cid, handle.context);
+ result = VMCI_ERROR_DST_UNREACHABLE;
+ goto out;
+ }
+
+ result = vmci_dbell_get_priv_flags(handle, &dst_priv_flags);
+ if (result < VMCI_SUCCESS) {
+ pr_warn("Failed to get privilege flags for destination (handle=0x%x:0x%x)\n",
+ handle.context, handle.resource);
+ goto out;
+ }
+
+ if (src_cid != VMCI_HOST_CONTEXT_ID ||
+ src_priv_flags == VMCI_NO_PRIVILEGE_FLAGS) {
+ src_priv_flags = vmci_context_get_priv_flags(src_cid);
+ }
+
+ if (vmci_deny_interaction(src_priv_flags, dst_priv_flags)) {
+ result = VMCI_ERROR_NO_ACCESS;
+ goto out;
+ }
+ }
+
+ if (handle.context == VMCI_HOST_CONTEXT_ID) {
+ result = vmci_dbell_host_context_notify(src_cid, handle);
+ } else {
+ spin_lock(&dst_context->lock);
+
+ if (!vmci_handle_arr_has_entry(dst_context->doorbell_array,
+ handle)) {
+ result = VMCI_ERROR_NOT_FOUND;
+ } else {
+ if (!vmci_handle_arr_has_entry(
+ dst_context->pending_doorbell_array,
+ handle)) {
+ vmci_handle_arr_append_entry(
+ &dst_context->pending_doorbell_array,
+ handle);
+
+ ctx_signal_notify(dst_context);
+ wake_up(&dst_context->host_context.wait_queue);
+
+ }
+ result = VMCI_SUCCESS;
+ }
+ spin_unlock(&dst_context->lock);
+ }
+
+ out:
+ vmci_ctx_put(dst_context);
+
+ return result;
+}
+
+bool vmci_ctx_supports_host_qp(struct vmci_ctx *context)
+{
+ return context && context->user_version >= VMCI_VERSION_HOSTQP;
+}
+
+/*
+ * Registers that a new queue pair handle has been allocated by
+ * the context.
+ */
+int vmci_ctx_qp_create(struct vmci_ctx *context, struct vmci_handle handle)
+{
+ int result;
+
+ if (context == NULL || vmci_handle_is_invalid(handle))
+ return VMCI_ERROR_INVALID_ARGS;
+
+ if (!vmci_handle_arr_has_entry(context->queue_pair_array, handle)) {
+ vmci_handle_arr_append_entry(&context->queue_pair_array,
+ handle);
+ result = VMCI_SUCCESS;
+ } else {
+ result = VMCI_ERROR_DUPLICATE_ENTRY;
+ }
+
+ return result;
+}
+
+/*
+ * Unregisters a queue pair handle that was previously registered
+ * with vmci_ctx_qp_create.
+ */
+int vmci_ctx_qp_destroy(struct vmci_ctx *context, struct vmci_handle handle)
+{
+ struct vmci_handle hndl;
+
+ if (context == NULL || vmci_handle_is_invalid(handle))
+ return VMCI_ERROR_INVALID_ARGS;
+
+ hndl = vmci_handle_arr_remove_entry(context->queue_pair_array, handle);
+
+ return vmci_handle_is_invalid(hndl) ?
+ VMCI_ERROR_NOT_FOUND : VMCI_SUCCESS;
+}
+
+/*
+ * Determines whether a given queue pair handle is registered
+ * with the given context.
+ */
+bool vmci_ctx_qp_exists(struct vmci_ctx *context, struct vmci_handle handle)
+{
+ if (context == NULL || vmci_handle_is_invalid(handle))
+ return false;
+
+ return vmci_handle_arr_has_entry(context->queue_pair_array, handle);
+}
+
+/*
+ * vmci_context_get_priv_flags() - Retrieve privilege flags.
+ * @context_id: The context ID of the VMCI context.
+ *
+ * Retrieves privilege flags of the given VMCI context ID.
+ */
+u32 vmci_context_get_priv_flags(u32 context_id)
+{
+ if (vmci_host_code_active()) {
+ u32 flags;
+ struct vmci_ctx *context;
+
+ context = vmci_ctx_get(context_id);
+ if (!context)
+ return VMCI_LEAST_PRIVILEGE_FLAGS;
+
+ flags = context->priv_flags;
+ vmci_ctx_put(context);
+ return flags;
+ }
+ return VMCI_NO_PRIVILEGE_FLAGS;
+}
+EXPORT_SYMBOL_GPL(vmci_context_get_priv_flags);
+
+/*
+ * vmci_is_context_owner() - Determimnes if user is the context owner
+ * @context_id: The context ID of the VMCI context.
+ * @uid: The host user id (real kernel value).
+ *
+ * Determines whether a given UID is the owner of given VMCI context.
+ */
+bool vmci_is_context_owner(u32 context_id, kuid_t uid)
+{
+ bool is_owner = false;
+
+ if (vmci_host_code_active()) {
+ struct vmci_ctx *context = vmci_ctx_get(context_id);
+ if (context) {
+ if (context->cred)
+ is_owner = uid_eq(context->cred->uid, uid);
+ vmci_ctx_put(context);
+ }
+ }
+
+ return is_owner;
+}
+EXPORT_SYMBOL_GPL(vmci_is_context_owner);
diff --git a/drivers/misc/vmw_vmci/vmci_context.h b/drivers/misc/vmw_vmci/vmci_context.h
new file mode 100644
index 00000000000..24a88e68a1e
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_context.h
@@ -0,0 +1,182 @@
+/*
+ * VMware VMCI driver (vmciContext.h)
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef _VMCI_CONTEXT_H_
+#define _VMCI_CONTEXT_H_
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/atomic.h>
+#include <linux/kref.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+
+#include "vmci_handle_array.h"
+#include "vmci_datagram.h"
+
+/* Used to determine what checkpoint state to get and set. */
+enum {
+ VMCI_NOTIFICATION_CPT_STATE = 1,
+ VMCI_WELLKNOWN_CPT_STATE = 2,
+ VMCI_DG_OUT_STATE = 3,
+ VMCI_DG_IN_STATE = 4,
+ VMCI_DG_IN_SIZE_STATE = 5,
+ VMCI_DOORBELL_CPT_STATE = 6,
+};
+
+/* Host specific struct used for signalling */
+struct vmci_host {
+ wait_queue_head_t wait_queue;
+};
+
+struct vmci_handle_list {
+ struct list_head node;
+ struct vmci_handle handle;
+};
+
+struct vmci_ctx {
+ struct list_head list_item; /* For global VMCI list. */
+ u32 cid;
+ struct kref kref;
+ struct list_head datagram_queue; /* Head of per VM queue. */
+ u32 pending_datagrams;
+ size_t datagram_queue_size; /* Size of datagram queue in bytes. */
+
+ /*
+ * Version of the code that created
+ * this context; e.g., VMX.
+ */
+ int user_version;
+ spinlock_t lock; /* Locks callQueue and handle_arrays. */
+
+ /*
+ * queue_pairs attached to. The array of
+ * handles for queue pairs is accessed
+ * from the code for QP API, and there
+ * it is protected by the QP lock. It
+ * is also accessed from the context
+ * clean up path, which does not
+ * require a lock. VMCILock is not
+ * used to protect the QP array field.
+ */
+ struct vmci_handle_arr *queue_pair_array;
+
+ /* Doorbells created by context. */
+ struct vmci_handle_arr *doorbell_array;
+
+ /* Doorbells pending for context. */
+ struct vmci_handle_arr *pending_doorbell_array;
+
+ /* Contexts current context is subscribing to. */
+ struct list_head notifier_list;
+ unsigned int n_notifiers;
+
+ struct vmci_host host_context;
+ u32 priv_flags;
+
+ const struct cred *cred;
+ bool *notify; /* Notify flag pointer - hosted only. */
+ struct page *notify_page; /* Page backing the notify UVA. */
+};
+
+/* VMCINotifyAddRemoveInfo: Used to add/remove remote context notifications. */
+struct vmci_ctx_info {
+ u32 remote_cid;
+ int result;
+};
+
+/* VMCICptBufInfo: Used to set/get current context's checkpoint state. */
+struct vmci_ctx_chkpt_buf_info {
+ u64 cpt_buf;
+ u32 cpt_type;
+ u32 buf_size;
+ s32 result;
+ u32 _pad;
+};
+
+/*
+ * VMCINotificationReceiveInfo: Used to recieve pending notifications
+ * for doorbells and queue pairs.
+ */
+struct vmci_ctx_notify_recv_info {
+ u64 db_handle_buf_uva;
+ u64 db_handle_buf_size;
+ u64 qp_handle_buf_uva;
+ u64 qp_handle_buf_size;
+ s32 result;
+ u32 _pad;
+};
+
+/*
+ * Utilility function that checks whether two entities are allowed
+ * to interact. If one of them is restricted, the other one must
+ * be trusted.
+ */
+static inline bool vmci_deny_interaction(u32 part_one, u32 part_two)
+{
+ return ((part_one & VMCI_PRIVILEGE_FLAG_RESTRICTED) &&
+ !(part_two & VMCI_PRIVILEGE_FLAG_TRUSTED)) ||
+ ((part_two & VMCI_PRIVILEGE_FLAG_RESTRICTED) &&
+ !(part_one & VMCI_PRIVILEGE_FLAG_TRUSTED));
+}
+
+struct vmci_ctx *vmci_ctx_create(u32 cid, u32 flags,
+ uintptr_t event_hnd, int version,
+ const struct cred *cred);
+void vmci_ctx_destroy(struct vmci_ctx *context);
+
+bool vmci_ctx_supports_host_qp(struct vmci_ctx *context);
+int vmci_ctx_enqueue_datagram(u32 cid, struct vmci_datagram *dg);
+int vmci_ctx_dequeue_datagram(struct vmci_ctx *context,
+ size_t *max_size, struct vmci_datagram **dg);
+int vmci_ctx_pending_datagrams(u32 cid, u32 *pending);
+struct vmci_ctx *vmci_ctx_get(u32 cid);
+void vmci_ctx_put(struct vmci_ctx *context);
+bool vmci_ctx_exists(u32 cid);
+
+int vmci_ctx_add_notification(u32 context_id, u32 remote_cid);
+int vmci_ctx_remove_notification(u32 context_id, u32 remote_cid);
+int vmci_ctx_get_chkpt_state(u32 context_id, u32 cpt_type,
+ u32 *num_cids, void **cpt_buf_ptr);
+int vmci_ctx_set_chkpt_state(u32 context_id, u32 cpt_type,
+ u32 num_cids, void *cpt_buf);
+
+int vmci_ctx_qp_create(struct vmci_ctx *context, struct vmci_handle handle);
+int vmci_ctx_qp_destroy(struct vmci_ctx *context, struct vmci_handle handle);
+bool vmci_ctx_qp_exists(struct vmci_ctx *context, struct vmci_handle handle);
+
+void vmci_ctx_check_signal_notify(struct vmci_ctx *context);
+void vmci_ctx_unset_notify(struct vmci_ctx *context);
+
+int vmci_ctx_dbell_create(u32 context_id, struct vmci_handle handle);
+int vmci_ctx_dbell_destroy(u32 context_id, struct vmci_handle handle);
+int vmci_ctx_dbell_destroy_all(u32 context_id);
+int vmci_ctx_notify_dbell(u32 cid, struct vmci_handle handle,
+ u32 src_priv_flags);
+
+int vmci_ctx_rcv_notifications_get(u32 context_id, struct vmci_handle_arr
+ **db_handle_array, struct vmci_handle_arr
+ **qp_handle_array);
+void vmci_ctx_rcv_notifications_release(u32 context_id, struct vmci_handle_arr
+ *db_handle_array, struct vmci_handle_arr
+ *qp_handle_array, bool success);
+
+static inline u32 vmci_ctx_get_id(struct vmci_ctx *context)
+{
+ if (!context)
+ return VMCI_INVALID_ID;
+ return context->cid;
+}
+
+#endif /* _VMCI_CONTEXT_H_ */
diff --git a/drivers/misc/vmw_vmci/vmci_datagram.c b/drivers/misc/vmw_vmci/vmci_datagram.c
new file mode 100644
index 00000000000..ed5c433cd49
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_datagram.c
@@ -0,0 +1,500 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/vmw_vmci_api.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/bug.h>
+
+#include "vmci_datagram.h"
+#include "vmci_resource.h"
+#include "vmci_context.h"
+#include "vmci_driver.h"
+#include "vmci_event.h"
+#include "vmci_route.h"
+
+/*
+ * struct datagram_entry describes the datagram entity. It is used for datagram
+ * entities created only on the host.
+ */
+struct datagram_entry {
+ struct vmci_resource resource;
+ u32 flags;
+ bool run_delayed;
+ vmci_datagram_recv_cb recv_cb;
+ void *client_data;
+ u32 priv_flags;
+};
+
+struct delayed_datagram_info {
+ struct datagram_entry *entry;
+ struct vmci_datagram msg;
+ struct work_struct work;
+ bool in_dg_host_queue;
+};
+
+/* Number of in-flight host->host datagrams */
+static atomic_t delayed_dg_host_queue_size = ATOMIC_INIT(0);
+
+/*
+ * Create a datagram entry given a handle pointer.
+ */
+static int dg_create_handle(u32 resource_id,
+ u32 flags,
+ u32 priv_flags,
+ vmci_datagram_recv_cb recv_cb,
+ void *client_data, struct vmci_handle *out_handle)
+{
+ int result;
+ u32 context_id;
+ struct vmci_handle handle;
+ struct datagram_entry *entry;
+
+ if ((flags & VMCI_FLAG_WELLKNOWN_DG_HND) != 0)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ if ((flags & VMCI_FLAG_ANYCID_DG_HND) != 0) {
+ context_id = VMCI_INVALID_ID;
+ } else {
+ context_id = vmci_get_context_id();
+ if (context_id == VMCI_INVALID_ID)
+ return VMCI_ERROR_NO_RESOURCES;
+ }
+
+ handle = vmci_make_handle(context_id, resource_id);
+
+ entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry) {
+ pr_warn("Failed allocating memory for datagram entry\n");
+ return VMCI_ERROR_NO_MEM;
+ }
+
+ entry->run_delayed = (flags & VMCI_FLAG_DG_DELAYED_CB) ? true : false;
+ entry->flags = flags;
+ entry->recv_cb = recv_cb;
+ entry->client_data = client_data;
+ entry->priv_flags = priv_flags;
+
+ /* Make datagram resource live. */
+ result = vmci_resource_add(&entry->resource,
+ VMCI_RESOURCE_TYPE_DATAGRAM,
+ handle);
+ if (result != VMCI_SUCCESS) {
+ pr_warn("Failed to add new resource (handle=0x%x:0x%x), error: %d\n",
+ handle.context, handle.resource, result);
+ kfree(entry);
+ return result;
+ }
+
+ *out_handle = vmci_resource_handle(&entry->resource);
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Internal utility function with the same purpose as
+ * vmci_datagram_get_priv_flags that also takes a context_id.
+ */
+static int vmci_datagram_get_priv_flags(u32 context_id,
+ struct vmci_handle handle,
+ u32 *priv_flags)
+{
+ if (context_id == VMCI_INVALID_ID)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ if (context_id == VMCI_HOST_CONTEXT_ID) {
+ struct datagram_entry *src_entry;
+ struct vmci_resource *resource;
+
+ resource = vmci_resource_by_handle(handle,
+ VMCI_RESOURCE_TYPE_DATAGRAM);
+ if (!resource)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ src_entry = container_of(resource, struct datagram_entry,
+ resource);
+ *priv_flags = src_entry->priv_flags;
+ vmci_resource_put(resource);
+ } else if (context_id == VMCI_HYPERVISOR_CONTEXT_ID)
+ *priv_flags = VMCI_MAX_PRIVILEGE_FLAGS;
+ else
+ *priv_flags = vmci_context_get_priv_flags(context_id);
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Calls the specified callback in a delayed context.
+ */
+static void dg_delayed_dispatch(struct work_struct *work)
+{
+ struct delayed_datagram_info *dg_info =
+ container_of(work, struct delayed_datagram_info, work);
+
+ dg_info->entry->recv_cb(dg_info->entry->client_data, &dg_info->msg);
+
+ vmci_resource_put(&dg_info->entry->resource);
+
+ if (dg_info->in_dg_host_queue)
+ atomic_dec(&delayed_dg_host_queue_size);
+
+ kfree(dg_info);
+}
+
+/*
+ * Dispatch datagram as a host, to the host, or other vm context. This
+ * function cannot dispatch to hypervisor context handlers. This should
+ * have been handled before we get here by vmci_datagram_dispatch.
+ * Returns number of bytes sent on success, error code otherwise.
+ */
+static int dg_dispatch_as_host(u32 context_id, struct vmci_datagram *dg)
+{
+ int retval;
+ size_t dg_size;
+ u32 src_priv_flags;
+
+ dg_size = VMCI_DG_SIZE(dg);
+
+ /* Host cannot send to the hypervisor. */
+ if (dg->dst.context == VMCI_HYPERVISOR_CONTEXT_ID)
+ return VMCI_ERROR_DST_UNREACHABLE;
+
+ /* Check that source handle matches sending context. */
+ if (dg->src.context != context_id) {
+ pr_devel("Sender context (ID=0x%x) is not owner of src datagram entry (handle=0x%x:0x%x)\n",
+ context_id, dg->src.context, dg->src.resource);
+ return VMCI_ERROR_NO_ACCESS;
+ }
+
+ /* Get hold of privileges of sending endpoint. */
+ retval = vmci_datagram_get_priv_flags(context_id, dg->src,
+ &src_priv_flags);
+ if (retval != VMCI_SUCCESS) {
+ pr_warn("Couldn't get privileges (handle=0x%x:0x%x)\n",
+ dg->src.context, dg->src.resource);
+ return retval;
+ }
+
+ /* Determine if we should route to host or guest destination. */
+ if (dg->dst.context == VMCI_HOST_CONTEXT_ID) {
+ /* Route to host datagram entry. */
+ struct datagram_entry *dst_entry;
+ struct vmci_resource *resource;
+
+ if (dg->src.context == VMCI_HYPERVISOR_CONTEXT_ID &&
+ dg->dst.resource == VMCI_EVENT_HANDLER) {
+ return vmci_event_dispatch(dg);
+ }
+
+ resource = vmci_resource_by_handle(dg->dst,
+ VMCI_RESOURCE_TYPE_DATAGRAM);
+ if (!resource) {
+ pr_devel("Sending to invalid destination (handle=0x%x:0x%x)\n",
+ dg->dst.context, dg->dst.resource);
+ return VMCI_ERROR_INVALID_RESOURCE;
+ }
+ dst_entry = container_of(resource, struct datagram_entry,
+ resource);
+ if (vmci_deny_interaction(src_priv_flags,
+ dst_entry->priv_flags)) {
+ vmci_resource_put(resource);
+ return VMCI_ERROR_NO_ACCESS;
+ }
+
+ /*
+ * If a VMCI datagram destined for the host is also sent by the
+ * host, we always run it delayed. This ensures that no locks
+ * are held when the datagram callback runs.
+ */
+ if (dst_entry->run_delayed ||
+ dg->src.context == VMCI_HOST_CONTEXT_ID) {
+ struct delayed_datagram_info *dg_info;
+
+ if (atomic_add_return(1, &delayed_dg_host_queue_size)
+ == VMCI_MAX_DELAYED_DG_HOST_QUEUE_SIZE) {
+ atomic_dec(&delayed_dg_host_queue_size);
+ vmci_resource_put(resource);
+ return VMCI_ERROR_NO_MEM;
+ }
+
+ dg_info = kmalloc(sizeof(*dg_info) +
+ (size_t) dg->payload_size, GFP_ATOMIC);
+ if (!dg_info) {
+ atomic_dec(&delayed_dg_host_queue_size);
+ vmci_resource_put(resource);
+ return VMCI_ERROR_NO_MEM;
+ }
+
+ dg_info->in_dg_host_queue = true;
+ dg_info->entry = dst_entry;
+ memcpy(&dg_info->msg, dg, dg_size);
+
+ INIT_WORK(&dg_info->work, dg_delayed_dispatch);
+ schedule_work(&dg_info->work);
+ retval = VMCI_SUCCESS;
+
+ } else {
+ retval = dst_entry->recv_cb(dst_entry->client_data, dg);
+ vmci_resource_put(resource);
+ if (retval < VMCI_SUCCESS)
+ return retval;
+ }
+ } else {
+ /* Route to destination VM context. */
+ struct vmci_datagram *new_dg;
+
+ if (context_id != dg->dst.context) {
+ if (vmci_deny_interaction(src_priv_flags,
+ vmci_context_get_priv_flags
+ (dg->dst.context))) {
+ return VMCI_ERROR_NO_ACCESS;
+ } else if (VMCI_CONTEXT_IS_VM(context_id)) {
+ /*
+ * If the sending context is a VM, it
+ * cannot reach another VM.
+ */
+
+ pr_devel("Datagram communication between VMs not supported (src=0x%x, dst=0x%x)\n",
+ context_id, dg->dst.context);
+ return VMCI_ERROR_DST_UNREACHABLE;
+ }
+ }
+
+ /* We make a copy to enqueue. */
+ new_dg = kmalloc(dg_size, GFP_KERNEL);
+ if (new_dg == NULL)
+ return VMCI_ERROR_NO_MEM;
+
+ memcpy(new_dg, dg, dg_size);
+ retval = vmci_ctx_enqueue_datagram(dg->dst.context, new_dg);
+ if (retval < VMCI_SUCCESS) {
+ kfree(new_dg);
+ return retval;
+ }
+ }
+
+ /*
+ * We currently truncate the size to signed 32 bits. This doesn't
+ * matter for this handler as it only support 4Kb messages.
+ */
+ return (int)dg_size;
+}
+
+/*
+ * Dispatch datagram as a guest, down through the VMX and potentially to
+ * the host.
+ * Returns number of bytes sent on success, error code otherwise.
+ */
+static int dg_dispatch_as_guest(struct vmci_datagram *dg)
+{
+ int retval;
+ struct vmci_resource *resource;
+
+ resource = vmci_resource_by_handle(dg->src,
+ VMCI_RESOURCE_TYPE_DATAGRAM);
+ if (!resource)
+ return VMCI_ERROR_NO_HANDLE;
+
+ retval = vmci_send_datagram(dg);
+ vmci_resource_put(resource);
+ return retval;
+}
+
+/*
+ * Dispatch datagram. This will determine the routing for the datagram
+ * and dispatch it accordingly.
+ * Returns number of bytes sent on success, error code otherwise.
+ */
+int vmci_datagram_dispatch(u32 context_id,
+ struct vmci_datagram *dg, bool from_guest)
+{
+ int retval;
+ enum vmci_route route;
+
+ BUILD_BUG_ON(sizeof(struct vmci_datagram) != 24);
+
+ if (VMCI_DG_SIZE(dg) > VMCI_MAX_DG_SIZE) {
+ pr_devel("Payload (size=%llu bytes) too big to send\n",
+ (unsigned long long)dg->payload_size);
+ return VMCI_ERROR_INVALID_ARGS;
+ }
+
+ retval = vmci_route(&dg->src, &dg->dst, from_guest, &route);
+ if (retval < VMCI_SUCCESS) {
+ pr_devel("Failed to route datagram (src=0x%x, dst=0x%x, err=%d)\n",
+ dg->src.context, dg->dst.context, retval);
+ return retval;
+ }
+
+ if (VMCI_ROUTE_AS_HOST == route) {
+ if (VMCI_INVALID_ID == context_id)
+ context_id = VMCI_HOST_CONTEXT_ID;
+ return dg_dispatch_as_host(context_id, dg);
+ }
+
+ if (VMCI_ROUTE_AS_GUEST == route)
+ return dg_dispatch_as_guest(dg);
+
+ pr_warn("Unknown route (%d) for datagram\n", route);
+ return VMCI_ERROR_DST_UNREACHABLE;
+}
+
+/*
+ * Invoke the handler for the given datagram. This is intended to be
+ * called only when acting as a guest and receiving a datagram from the
+ * virtual device.
+ */
+int vmci_datagram_invoke_guest_handler(struct vmci_datagram *dg)
+{
+ struct vmci_resource *resource;
+ struct datagram_entry *dst_entry;
+
+ resource = vmci_resource_by_handle(dg->dst,
+ VMCI_RESOURCE_TYPE_DATAGRAM);
+ if (!resource) {
+ pr_devel("destination (handle=0x%x:0x%x) doesn't exist\n",
+ dg->dst.context, dg->dst.resource);
+ return VMCI_ERROR_NO_HANDLE;
+ }
+
+ dst_entry = container_of(resource, struct datagram_entry, resource);
+ if (dst_entry->run_delayed) {
+ struct delayed_datagram_info *dg_info;
+
+ dg_info = kmalloc(sizeof(*dg_info) + (size_t)dg->payload_size,
+ GFP_ATOMIC);
+ if (!dg_info) {
+ vmci_resource_put(resource);
+ return VMCI_ERROR_NO_MEM;
+ }
+
+ dg_info->in_dg_host_queue = false;
+ dg_info->entry = dst_entry;
+ memcpy(&dg_info->msg, dg, VMCI_DG_SIZE(dg));
+
+ INIT_WORK(&dg_info->work, dg_delayed_dispatch);
+ schedule_work(&dg_info->work);
+ } else {
+ dst_entry->recv_cb(dst_entry->client_data, dg);
+ vmci_resource_put(resource);
+ }
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * vmci_datagram_create_handle_priv() - Create host context datagram endpoint
+ * @resource_id: The resource ID.
+ * @flags: Datagram Flags.
+ * @priv_flags: Privilege Flags.
+ * @recv_cb: Callback when receiving datagrams.
+ * @client_data: Pointer for a datagram_entry struct
+ * @out_handle: vmci_handle that is populated as a result of this function.
+ *
+ * Creates a host context datagram endpoint and returns a handle to it.
+ */
+int vmci_datagram_create_handle_priv(u32 resource_id,
+ u32 flags,
+ u32 priv_flags,
+ vmci_datagram_recv_cb recv_cb,
+ void *client_data,
+ struct vmci_handle *out_handle)
+{
+ if (out_handle == NULL)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ if (recv_cb == NULL) {
+ pr_devel("Client callback needed when creating datagram\n");
+ return VMCI_ERROR_INVALID_ARGS;
+ }
+
+ if (priv_flags & ~VMCI_PRIVILEGE_ALL_FLAGS)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ return dg_create_handle(resource_id, flags, priv_flags, recv_cb,
+ client_data, out_handle);
+}
+EXPORT_SYMBOL_GPL(vmci_datagram_create_handle_priv);
+
+/*
+ * vmci_datagram_create_handle() - Create host context datagram endpoint
+ * @resource_id: Resource ID.
+ * @flags: Datagram Flags.
+ * @recv_cb: Callback when receiving datagrams.
+ * @client_ata: Pointer for a datagram_entry struct
+ * @out_handle: vmci_handle that is populated as a result of this function.
+ *
+ * Creates a host context datagram endpoint and returns a handle to
+ * it. Same as vmci_datagram_create_handle_priv without the priviledge
+ * flags argument.
+ */
+int vmci_datagram_create_handle(u32 resource_id,
+ u32 flags,
+ vmci_datagram_recv_cb recv_cb,
+ void *client_data,
+ struct vmci_handle *out_handle)
+{
+ return vmci_datagram_create_handle_priv(
+ resource_id, flags,
+ VMCI_DEFAULT_PROC_PRIVILEGE_FLAGS,
+ recv_cb, client_data,
+ out_handle);
+}
+EXPORT_SYMBOL_GPL(vmci_datagram_create_handle);
+
+/*
+ * vmci_datagram_destroy_handle() - Destroys datagram handle
+ * @handle: vmci_handle to be destroyed and reaped.
+ *
+ * Use this function to destroy any datagram handles created by
+ * vmci_datagram_create_handle{,Priv} functions.
+ */
+int vmci_datagram_destroy_handle(struct vmci_handle handle)
+{
+ struct datagram_entry *entry;
+ struct vmci_resource *resource;
+
+ resource = vmci_resource_by_handle(handle, VMCI_RESOURCE_TYPE_DATAGRAM);
+ if (!resource) {
+ pr_devel("Failed to destroy datagram (handle=0x%x:0x%x)\n",
+ handle.context, handle.resource);
+ return VMCI_ERROR_NOT_FOUND;
+ }
+
+ entry = container_of(resource, struct datagram_entry, resource);
+
+ vmci_resource_put(&entry->resource);
+ vmci_resource_remove(&entry->resource);
+ kfree(entry);
+
+ return VMCI_SUCCESS;
+}
+EXPORT_SYMBOL_GPL(vmci_datagram_destroy_handle);
+
+/*
+ * vmci_datagram_send() - Send a datagram
+ * @msg: The datagram to send.
+ *
+ * Sends the provided datagram on its merry way.
+ */
+int vmci_datagram_send(struct vmci_datagram *msg)
+{
+ if (msg == NULL)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ return vmci_datagram_dispatch(VMCI_INVALID_ID, msg, false);
+}
+EXPORT_SYMBOL_GPL(vmci_datagram_send);
diff --git a/drivers/misc/vmw_vmci/vmci_datagram.h b/drivers/misc/vmw_vmci/vmci_datagram.h
new file mode 100644
index 00000000000..eb4aab7f64e
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_datagram.h
@@ -0,0 +1,52 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef _VMCI_DATAGRAM_H_
+#define _VMCI_DATAGRAM_H_
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+#include "vmci_context.h"
+
+#define VMCI_MAX_DELAYED_DG_HOST_QUEUE_SIZE 256
+
+/*
+ * The struct vmci_datagram_queue_entry is a queue header for the in-kernel VMCI
+ * datagram queues. It is allocated in non-paged memory, as the
+ * content is accessed while holding a spinlock. The pending datagram
+ * itself may be allocated from paged memory. We shadow the size of
+ * the datagram in the non-paged queue entry as this size is used
+ * while holding the same spinlock as above.
+ */
+struct vmci_datagram_queue_entry {
+ struct list_head list_item; /* For queuing. */
+ size_t dg_size; /* Size of datagram. */
+ struct vmci_datagram *dg; /* Pending datagram. */
+};
+
+/* VMCIDatagramSendRecvInfo */
+struct vmci_datagram_snd_rcv_info {
+ u64 addr;
+ u32 len;
+ s32 result;
+};
+
+/* Datagram API for non-public use. */
+int vmci_datagram_dispatch(u32 context_id, struct vmci_datagram *dg,
+ bool from_guest);
+int vmci_datagram_invoke_guest_handler(struct vmci_datagram *dg);
+
+#endif /* _VMCI_DATAGRAM_H_ */
diff --git a/drivers/misc/vmw_vmci/vmci_doorbell.c b/drivers/misc/vmw_vmci/vmci_doorbell.c
new file mode 100644
index 00000000000..c3e8397f62e
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_doorbell.c
@@ -0,0 +1,604 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/vmw_vmci_api.h>
+#include <linux/completion.h>
+#include <linux/hash.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include "vmci_datagram.h"
+#include "vmci_doorbell.h"
+#include "vmci_resource.h"
+#include "vmci_driver.h"
+#include "vmci_route.h"
+
+
+#define VMCI_DOORBELL_INDEX_BITS 6
+#define VMCI_DOORBELL_INDEX_TABLE_SIZE (1 << VMCI_DOORBELL_INDEX_BITS)
+#define VMCI_DOORBELL_HASH(_idx) hash_32(_idx, VMCI_DOORBELL_INDEX_BITS)
+
+/*
+ * DoorbellEntry describes the a doorbell notification handle allocated by the
+ * host.
+ */
+struct dbell_entry {
+ struct vmci_resource resource;
+ struct hlist_node node;
+ struct work_struct work;
+ vmci_callback notify_cb;
+ void *client_data;
+ u32 idx;
+ u32 priv_flags;
+ bool run_delayed;
+ atomic_t active; /* Only used by guest personality */
+};
+
+/* The VMCI index table keeps track of currently registered doorbells. */
+struct dbell_index_table {
+ spinlock_t lock; /* Index table lock */
+ struct hlist_head entries[VMCI_DOORBELL_INDEX_TABLE_SIZE];
+};
+
+static struct dbell_index_table vmci_doorbell_it = {
+ .lock = __SPIN_LOCK_UNLOCKED(vmci_doorbell_it.lock),
+};
+
+/*
+ * The max_notify_idx is one larger than the currently known bitmap index in
+ * use, and is used to determine how much of the bitmap needs to be scanned.
+ */
+static u32 max_notify_idx;
+
+/*
+ * The notify_idx_count is used for determining whether there are free entries
+ * within the bitmap (if notify_idx_count + 1 < max_notify_idx).
+ */
+static u32 notify_idx_count;
+
+/*
+ * The last_notify_idx_reserved is used to track the last index handed out - in
+ * the case where multiple handles share a notification index, we hand out
+ * indexes round robin based on last_notify_idx_reserved.
+ */
+static u32 last_notify_idx_reserved;
+
+/* This is a one entry cache used to by the index allocation. */
+static u32 last_notify_idx_released = PAGE_SIZE;
+
+
+/*
+ * Utility function that retrieves the privilege flags associated
+ * with a given doorbell handle. For guest endpoints, the
+ * privileges are determined by the context ID, but for host
+ * endpoints privileges are associated with the complete
+ * handle. Hypervisor endpoints are not yet supported.
+ */
+int vmci_dbell_get_priv_flags(struct vmci_handle handle, u32 *priv_flags)
+{
+ if (priv_flags == NULL || handle.context == VMCI_INVALID_ID)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ if (handle.context == VMCI_HOST_CONTEXT_ID) {
+ struct dbell_entry *entry;
+ struct vmci_resource *resource;
+
+ resource = vmci_resource_by_handle(handle,
+ VMCI_RESOURCE_TYPE_DOORBELL);
+ if (!resource)
+ return VMCI_ERROR_NOT_FOUND;
+
+ entry = container_of(resource, struct dbell_entry, resource);
+ *priv_flags = entry->priv_flags;
+ vmci_resource_put(resource);
+ } else if (handle.context == VMCI_HYPERVISOR_CONTEXT_ID) {
+ /*
+ * Hypervisor endpoints for notifications are not
+ * supported (yet).
+ */
+ return VMCI_ERROR_INVALID_ARGS;
+ } else {
+ *priv_flags = vmci_context_get_priv_flags(handle.context);
+ }
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Find doorbell entry by bitmap index.
+ */
+static struct dbell_entry *dbell_index_table_find(u32 idx)
+{
+ u32 bucket = VMCI_DOORBELL_HASH(idx);
+ struct dbell_entry *dbell;
+ struct hlist_node *node;
+
+ hlist_for_each_entry(dbell, node, &vmci_doorbell_it.entries[bucket],
+ node) {
+ if (idx == dbell->idx)
+ return dbell;
+ }
+
+ return NULL;
+}
+
+/*
+ * Add the given entry to the index table. This willi take a reference to the
+ * entry's resource so that the entry is not deleted before it is removed from
+ * the * table.
+ */
+static void dbell_index_table_add(struct dbell_entry *entry)
+{
+ u32 bucket;
+ u32 new_notify_idx;
+
+ vmci_resource_get(&entry->resource);
+
+ spin_lock_bh(&vmci_doorbell_it.lock);
+
+ /*
+ * Below we try to allocate an index in the notification
+ * bitmap with "not too much" sharing between resources. If we
+ * use less that the full bitmap, we either add to the end if
+ * there are no unused flags within the currently used area,
+ * or we search for unused ones. If we use the full bitmap, we
+ * allocate the index round robin.
+ */
+ if (max_notify_idx < PAGE_SIZE || notify_idx_count < PAGE_SIZE) {
+ if (last_notify_idx_released < max_notify_idx &&
+ !dbell_index_table_find(last_notify_idx_released)) {
+ new_notify_idx = last_notify_idx_released;
+ last_notify_idx_released = PAGE_SIZE;
+ } else {
+ bool reused = false;
+ new_notify_idx = last_notify_idx_reserved;
+ if (notify_idx_count + 1 < max_notify_idx) {
+ do {
+ if (!dbell_index_table_find
+ (new_notify_idx)) {
+ reused = true;
+ break;
+ }
+ new_notify_idx = (new_notify_idx + 1) %
+ max_notify_idx;
+ } while (new_notify_idx !=
+ last_notify_idx_released);
+ }
+ if (!reused) {
+ new_notify_idx = max_notify_idx;
+ max_notify_idx++;
+ }
+ }
+ } else {
+ new_notify_idx = (last_notify_idx_reserved + 1) % PAGE_SIZE;
+ }
+
+ last_notify_idx_reserved = new_notify_idx;
+ notify_idx_count++;
+
+ entry->idx = new_notify_idx;
+ bucket = VMCI_DOORBELL_HASH(entry->idx);
+ hlist_add_head(&entry->node, &vmci_doorbell_it.entries[bucket]);
+
+ spin_unlock_bh(&vmci_doorbell_it.lock);
+}
+
+/*
+ * Remove the given entry from the index table. This will release() the
+ * entry's resource.
+ */
+static void dbell_index_table_remove(struct dbell_entry *entry)
+{
+ spin_lock_bh(&vmci_doorbell_it.lock);
+
+ hlist_del_init(&entry->node);
+
+ notify_idx_count--;
+ if (entry->idx == max_notify_idx - 1) {
+ /*
+ * If we delete an entry with the maximum known
+ * notification index, we take the opportunity to
+ * prune the current max. As there might be other
+ * unused indices immediately below, we lower the
+ * maximum until we hit an index in use.
+ */
+ while (max_notify_idx > 0 &&
+ !dbell_index_table_find(max_notify_idx - 1))
+ max_notify_idx--;
+ }
+
+ last_notify_idx_released = entry->idx;
+
+ spin_unlock_bh(&vmci_doorbell_it.lock);
+
+ vmci_resource_put(&entry->resource);
+}
+
+/*
+ * Creates a link between the given doorbell handle and the given
+ * index in the bitmap in the device backend. A notification state
+ * is created in hypervisor.
+ */
+static int dbell_link(struct vmci_handle handle, u32 notify_idx)
+{
+ struct vmci_doorbell_link_msg link_msg;
+
+ link_msg.hdr.dst = vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
+ VMCI_DOORBELL_LINK);
+ link_msg.hdr.src = VMCI_ANON_SRC_HANDLE;
+ link_msg.hdr.payload_size = sizeof(link_msg) - VMCI_DG_HEADERSIZE;
+ link_msg.handle = handle;
+ link_msg.notify_idx = notify_idx;
+
+ return vmci_send_datagram(&link_msg.hdr);
+}
+
+/*
+ * Unlinks the given doorbell handle from an index in the bitmap in
+ * the device backend. The notification state is destroyed in hypervisor.
+ */
+static int dbell_unlink(struct vmci_handle handle)
+{
+ struct vmci_doorbell_unlink_msg unlink_msg;
+
+ unlink_msg.hdr.dst = vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
+ VMCI_DOORBELL_UNLINK);
+ unlink_msg.hdr.src = VMCI_ANON_SRC_HANDLE;
+ unlink_msg.hdr.payload_size = sizeof(unlink_msg) - VMCI_DG_HEADERSIZE;
+ unlink_msg.handle = handle;
+
+ return vmci_send_datagram(&unlink_msg.hdr);
+}
+
+/*
+ * Notify another guest or the host. We send a datagram down to the
+ * host via the hypervisor with the notification info.
+ */
+static int dbell_notify_as_guest(struct vmci_handle handle, u32 priv_flags)
+{
+ struct vmci_doorbell_notify_msg notify_msg;
+
+ notify_msg.hdr.dst = vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
+ VMCI_DOORBELL_NOTIFY);
+ notify_msg.hdr.src = VMCI_ANON_SRC_HANDLE;
+ notify_msg.hdr.payload_size = sizeof(notify_msg) - VMCI_DG_HEADERSIZE;
+ notify_msg.handle = handle;
+
+ return vmci_send_datagram(&notify_msg.hdr);
+}
+
+/*
+ * Calls the specified callback in a delayed context.
+ */
+static void dbell_delayed_dispatch(struct work_struct *work)
+{
+ struct dbell_entry *entry = container_of(work,
+ struct dbell_entry, work);
+
+ entry->notify_cb(entry->client_data);
+ vmci_resource_put(&entry->resource);
+}
+
+/*
+ * Dispatches a doorbell notification to the host context.
+ */
+int vmci_dbell_host_context_notify(u32 src_cid, struct vmci_handle handle)
+{
+ struct dbell_entry *entry;
+ struct vmci_resource *resource;
+
+ if (vmci_handle_is_invalid(handle)) {
+ pr_devel("Notifying an invalid doorbell (handle=0x%x:0x%x)\n",
+ handle.context, handle.resource);
+ return VMCI_ERROR_INVALID_ARGS;
+ }
+
+ resource = vmci_resource_by_handle(handle,
+ VMCI_RESOURCE_TYPE_DOORBELL);
+ if (!resource) {
+ pr_devel("Notifying an unknown doorbell (handle=0x%x:0x%x)\n",
+ handle.context, handle.resource);
+ return VMCI_ERROR_NOT_FOUND;
+ }
+
+ entry = container_of(resource, struct dbell_entry, resource);
+ if (entry->run_delayed) {
+ schedule_work(&entry->work);
+ } else {
+ entry->notify_cb(entry->client_data);
+ vmci_resource_put(resource);
+ }
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Register the notification bitmap with the host.
+ */
+bool vmci_dbell_register_notification_bitmap(u32 bitmap_ppn)
+{
+ int result;
+ struct vmci_notify_bm_set_msg bitmap_set_msg;
+
+ bitmap_set_msg.hdr.dst = vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
+ VMCI_SET_NOTIFY_BITMAP);
+ bitmap_set_msg.hdr.src = VMCI_ANON_SRC_HANDLE;
+ bitmap_set_msg.hdr.payload_size = sizeof(bitmap_set_msg) -
+ VMCI_DG_HEADERSIZE;
+ bitmap_set_msg.bitmap_ppn = bitmap_ppn;
+
+ result = vmci_send_datagram(&bitmap_set_msg.hdr);
+ if (result != VMCI_SUCCESS) {
+ pr_devel("Failed to register (PPN=%u) as notification bitmap (error=%d)\n",
+ bitmap_ppn, result);
+ return false;
+ }
+ return true;
+}
+
+/*
+ * Executes or schedules the handlers for a given notify index.
+ */
+static void dbell_fire_entries(u32 notify_idx)
+{
+ u32 bucket = VMCI_DOORBELL_HASH(notify_idx);
+ struct dbell_entry *dbell;
+ struct hlist_node *node;
+
+ spin_lock_bh(&vmci_doorbell_it.lock);
+
+ hlist_for_each_entry(dbell, node,
+ &vmci_doorbell_it.entries[bucket], node) {
+ if (dbell->idx == notify_idx &&
+ atomic_read(&dbell->active) == 1) {
+ if (dbell->run_delayed) {
+ vmci_resource_get(&dbell->resource);
+ schedule_work(&dbell->work);
+ } else {
+ dbell->notify_cb(dbell->client_data);
+ }
+ }
+ }
+
+ spin_unlock_bh(&vmci_doorbell_it.lock);
+}
+
+/*
+ * Scans the notification bitmap, collects pending notifications,
+ * resets the bitmap and invokes appropriate callbacks.
+ */
+void vmci_dbell_scan_notification_entries(u8 *bitmap)
+{
+ u32 idx;
+
+ for (idx = 0; idx < max_notify_idx; idx++) {
+ if (bitmap[idx] & 0x1) {
+ bitmap[idx] &= ~1;
+ dbell_fire_entries(idx);
+ }
+ }
+}
+
+/*
+ * vmci_doorbell_create() - Creates a doorbell
+ * @handle: A handle used to track the resource. Can be invalid.
+ * @flags: Flag that determines context of callback.
+ * @priv_flags: Privileges flags.
+ * @notify_cb: The callback to be ivoked when the doorbell fires.
+ * @client_data: A parameter to be passed to the callback.
+ *
+ * Creates a doorbell with the given callback. If the handle is
+ * VMCI_INVALID_HANDLE, a free handle will be assigned, if
+ * possible. The callback can be run immediately (potentially with
+ * locks held - the default) or delayed (in a kernel thread) by
+ * specifying the flag VMCI_FLAG_DELAYED_CB. If delayed execution
+ * is selected, a given callback may not be run if the kernel is
+ * unable to allocate memory for the delayed execution (highly
+ * unlikely).
+ */
+int vmci_doorbell_create(struct vmci_handle *handle,
+ u32 flags,
+ u32 priv_flags,
+ vmci_callback notify_cb, void *client_data)
+{
+ struct dbell_entry *entry;
+ struct vmci_handle new_handle;
+ int result;
+
+ if (!handle || !notify_cb || flags & ~VMCI_FLAG_DELAYED_CB ||
+ priv_flags & ~VMCI_PRIVILEGE_ALL_FLAGS)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ if (entry == NULL) {
+ pr_warn("Failed allocating memory for datagram entry\n");
+ return VMCI_ERROR_NO_MEM;
+ }
+
+ if (vmci_handle_is_invalid(*handle)) {
+ u32 context_id = vmci_get_context_id();
+
+ /* Let resource code allocate a free ID for us */
+ new_handle = vmci_make_handle(context_id, VMCI_INVALID_ID);
+ } else {
+ bool valid_context = false;
+
+ /*
+ * Validate the handle. We must do both of the checks below
+ * because we can be acting as both a host and a guest at the
+ * same time. We always allow the host context ID, since the
+ * host functionality is in practice always there with the
+ * unified driver.
+ */
+ if (handle->context == VMCI_HOST_CONTEXT_ID ||
+ (vmci_guest_code_active() &&
+ vmci_get_context_id() == handle->context)) {
+ valid_context = true;
+ }
+
+ if (!valid_context || handle->resource == VMCI_INVALID_ID) {
+ pr_devel("Invalid argument (handle=0x%x:0x%x)\n",
+ handle->context, handle->resource);
+ result = VMCI_ERROR_INVALID_ARGS;
+ goto free_mem;
+ }
+
+ new_handle = *handle;
+ }
+
+ entry->idx = 0;
+ INIT_HLIST_NODE(&entry->node);
+ entry->priv_flags = priv_flags;
+ INIT_WORK(&entry->work, dbell_delayed_dispatch);
+ entry->run_delayed = flags & VMCI_FLAG_DELAYED_CB;
+ entry->notify_cb = notify_cb;
+ entry->client_data = client_data;
+ atomic_set(&entry->active, 0);
+
+ result = vmci_resource_add(&entry->resource,
+ VMCI_RESOURCE_TYPE_DOORBELL,
+ new_handle);
+ if (result != VMCI_SUCCESS) {
+ pr_warn("Failed to add new resource (handle=0x%x:0x%x), error: %d\n",
+ new_handle.context, new_handle.resource, result);
+ goto free_mem;
+ }
+
+ new_handle = vmci_resource_handle(&entry->resource);
+ if (vmci_guest_code_active()) {
+ dbell_index_table_add(entry);
+ result = dbell_link(new_handle, entry->idx);
+ if (VMCI_SUCCESS != result)
+ goto destroy_resource;
+
+ atomic_set(&entry->active, 1);
+ }
+
+ *handle = new_handle;
+
+ return result;
+
+ destroy_resource:
+ dbell_index_table_remove(entry);
+ vmci_resource_remove(&entry->resource);
+ free_mem:
+ kfree(entry);
+ return result;
+}
+EXPORT_SYMBOL_GPL(vmci_doorbell_create);
+
+/*
+ * vmci_doorbell_destroy() - Destroy a doorbell.
+ * @handle: The handle tracking the resource.
+ *
+ * Destroys a doorbell previously created with vmcii_doorbell_create. This
+ * operation may block waiting for a callback to finish.
+ */
+int vmci_doorbell_destroy(struct vmci_handle handle)
+{
+ struct dbell_entry *entry;
+ struct vmci_resource *resource;
+
+ if (vmci_handle_is_invalid(handle))
+ return VMCI_ERROR_INVALID_ARGS;
+
+ resource = vmci_resource_by_handle(handle,
+ VMCI_RESOURCE_TYPE_DOORBELL);
+ if (!resource) {
+ pr_devel("Failed to destroy doorbell (handle=0x%x:0x%x)\n",
+ handle.context, handle.resource);
+ return VMCI_ERROR_NOT_FOUND;
+ }
+
+ entry = container_of(resource, struct dbell_entry, resource);
+
+ if (vmci_guest_code_active()) {
+ int result;
+
+ dbell_index_table_remove(entry);
+
+ result = dbell_unlink(handle);
+ if (VMCI_SUCCESS != result) {
+
+ /*
+ * The only reason this should fail would be
+ * an inconsistency between guest and
+ * hypervisor state, where the guest believes
+ * it has an active registration whereas the
+ * hypervisor doesn't. One case where this may
+ * happen is if a doorbell is unregistered
+ * following a hibernation at a time where the
+ * doorbell state hasn't been restored on the
+ * hypervisor side yet. Since the handle has
+ * now been removed in the guest, we just
+ * print a warning and return success.
+ */
+ pr_devel("Unlink of doorbell (handle=0x%x:0x%x) unknown by hypervisor (error=%d)\n",
+ handle.context, handle.resource, result);
+ }
+ }
+
+ /*
+ * Now remove the resource from the table. It might still be in use
+ * after this, in a callback or still on the delayed work queue.
+ */
+ vmci_resource_put(&entry->resource);
+ vmci_resource_remove(&entry->resource);
+
+ kfree(entry);
+
+ return VMCI_SUCCESS;
+}
+EXPORT_SYMBOL_GPL(vmci_doorbell_destroy);
+
+/*
+ * vmci_doorbell_notify() - Ring the doorbell (and hide in the bushes).
+ * @dst: The handlle identifying the doorbell resource
+ * @priv_flags: Priviledge flags.
+ *
+ * Generates a notification on the doorbell identified by the
+ * handle. For host side generation of notifications, the caller
+ * can specify what the privilege of the calling side is.
+ */
+int vmci_doorbell_notify(struct vmci_handle dst, u32 priv_flags)
+{
+ int retval;
+ enum vmci_route route;
+ struct vmci_handle src;
+
+ if (vmci_handle_is_invalid(dst) ||
+ (priv_flags & ~VMCI_PRIVILEGE_ALL_FLAGS))
+ return VMCI_ERROR_INVALID_ARGS;
+
+ src = VMCI_INVALID_HANDLE;
+ retval = vmci_route(&src, &dst, false, &route);
+ if (retval < VMCI_SUCCESS)
+ return retval;
+
+ if (VMCI_ROUTE_AS_HOST == route)
+ return vmci_ctx_notify_dbell(VMCI_HOST_CONTEXT_ID,
+ dst, priv_flags);
+
+ if (VMCI_ROUTE_AS_GUEST == route)
+ return dbell_notify_as_guest(dst, priv_flags);
+
+ pr_warn("Unknown route (%d) for doorbell\n", route);
+ return VMCI_ERROR_DST_UNREACHABLE;
+}
+EXPORT_SYMBOL_GPL(vmci_doorbell_notify);
diff --git a/drivers/misc/vmw_vmci/vmci_doorbell.h b/drivers/misc/vmw_vmci/vmci_doorbell.h
new file mode 100644
index 00000000000..e4c0b17486a
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_doorbell.h
@@ -0,0 +1,51 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef VMCI_DOORBELL_H
+#define VMCI_DOORBELL_H
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/types.h>
+
+#include "vmci_driver.h"
+
+/*
+ * VMCINotifyResourceInfo: Used to create and destroy doorbells, and
+ * generate a notification for a doorbell or queue pair.
+ */
+struct vmci_dbell_notify_resource_info {
+ struct vmci_handle handle;
+ u16 resource;
+ u16 action;
+ s32 result;
+};
+
+/*
+ * Structure used for checkpointing the doorbell mappings. It is
+ * written to the checkpoint as is, so changing this structure will
+ * break checkpoint compatibility.
+ */
+struct dbell_cpt_state {
+ struct vmci_handle handle;
+ u64 bitmap_idx;
+};
+
+int vmci_dbell_host_context_notify(u32 src_cid, struct vmci_handle handle);
+int vmci_dbell_get_priv_flags(struct vmci_handle handle, u32 *priv_flags);
+
+bool vmci_dbell_register_notification_bitmap(u32 bitmap_ppn);
+void vmci_dbell_scan_notification_entries(u8 *bitmap);
+
+#endif /* VMCI_DOORBELL_H */
diff --git a/drivers/misc/vmw_vmci/vmci_driver.c b/drivers/misc/vmw_vmci/vmci_driver.c
new file mode 100644
index 00000000000..7b3fce2da6c
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_driver.c
@@ -0,0 +1,117 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/vmw_vmci_api.h>
+#include <linux/atomic.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include "vmci_driver.h"
+#include "vmci_event.h"
+
+static bool vmci_disable_host;
+module_param_named(disable_host, vmci_disable_host, bool, 0);
+MODULE_PARM_DESC(disable_host,
+ "Disable driver host personality (default=enabled)");
+
+static bool vmci_disable_guest;
+module_param_named(disable_guest, vmci_disable_guest, bool, 0);
+MODULE_PARM_DESC(disable_guest,
+ "Disable driver guest personality (default=enabled)");
+
+static bool vmci_guest_personality_initialized;
+static bool vmci_host_personality_initialized;
+
+/*
+ * vmci_get_context_id() - Gets the current context ID.
+ *
+ * Returns the current context ID. Note that since this is accessed only
+ * from code running in the host, this always returns the host context ID.
+ */
+u32 vmci_get_context_id(void)
+{
+ if (vmci_guest_code_active())
+ return vmci_get_vm_context_id();
+ else if (vmci_host_code_active())
+ return VMCI_HOST_CONTEXT_ID;
+
+ return VMCI_INVALID_ID;
+}
+EXPORT_SYMBOL_GPL(vmci_get_context_id);
+
+static int __init vmci_drv_init(void)
+{
+ int vmci_err;
+ int error;
+
+ vmci_err = vmci_event_init();
+ if (vmci_err < VMCI_SUCCESS) {
+ pr_err("Failed to initialize VMCIEvent (result=%d)\n",
+ vmci_err);
+ return -EINVAL;
+ }
+
+ if (!vmci_disable_guest) {
+ error = vmci_guest_init();
+ if (error) {
+ pr_warn("Failed to initialize guest personality (err=%d)\n",
+ error);
+ } else {
+ vmci_guest_personality_initialized = true;
+ pr_info("Guest personality initialized and is %s\n",
+ vmci_guest_code_active() ?
+ "active" : "inactive");
+ }
+ }
+
+ if (!vmci_disable_host) {
+ error = vmci_host_init();
+ if (error) {
+ pr_warn("Unable to initialize host personality (err=%d)\n",
+ error);
+ } else {
+ vmci_host_personality_initialized = true;
+ pr_info("Initialized host personality\n");
+ }
+ }
+
+ if (!vmci_guest_personality_initialized &&
+ !vmci_host_personality_initialized) {
+ vmci_event_exit();
+ return -ENODEV;
+ }
+
+ return 0;
+}
+module_init(vmci_drv_init);
+
+static void __exit vmci_drv_exit(void)
+{
+ if (vmci_guest_personality_initialized)
+ vmci_guest_exit();
+
+ if (vmci_host_personality_initialized)
+ vmci_host_exit();
+
+ vmci_event_exit();
+}
+module_exit(vmci_drv_exit);
+
+MODULE_AUTHOR("VMware, Inc.");
+MODULE_DESCRIPTION("VMware Virtual Machine Communication Interface.");
+MODULE_VERSION("1.0.0.0-k");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/vmw_vmci/vmci_driver.h b/drivers/misc/vmw_vmci/vmci_driver.h
new file mode 100644
index 00000000000..f69156a1f30
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_driver.h
@@ -0,0 +1,50 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef _VMCI_DRIVER_H_
+#define _VMCI_DRIVER_H_
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/wait.h>
+
+#include "vmci_queue_pair.h"
+#include "vmci_context.h"
+
+enum vmci_obj_type {
+ VMCIOBJ_VMX_VM = 10,
+ VMCIOBJ_CONTEXT,
+ VMCIOBJ_SOCKET,
+ VMCIOBJ_NOT_SET,
+};
+
+/* For storing VMCI structures in file handles. */
+struct vmci_obj {
+ void *ptr;
+ enum vmci_obj_type type;
+};
+
+u32 vmci_get_context_id(void);
+int vmci_send_datagram(struct vmci_datagram *dg);
+
+int vmci_host_init(void);
+void vmci_host_exit(void);
+bool vmci_host_code_active(void);
+
+int vmci_guest_init(void);
+void vmci_guest_exit(void);
+bool vmci_guest_code_active(void);
+u32 vmci_get_vm_context_id(void);
+
+#endif /* _VMCI_DRIVER_H_ */
diff --git a/drivers/misc/vmw_vmci/vmci_event.c b/drivers/misc/vmw_vmci/vmci_event.c
new file mode 100644
index 00000000000..8449516d6ac
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_event.c
@@ -0,0 +1,224 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/vmw_vmci_api.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include "vmci_driver.h"
+#include "vmci_event.h"
+
+#define EVENT_MAGIC 0xEABE0000
+#define VMCI_EVENT_MAX_ATTEMPTS 10
+
+struct vmci_subscription {
+ u32 id;
+ u32 event;
+ vmci_event_cb callback;
+ void *callback_data;
+ struct list_head node; /* on one of subscriber lists */
+};
+
+static struct list_head subscriber_array[VMCI_EVENT_MAX];
+static DEFINE_MUTEX(subscriber_mutex);
+
+int __init vmci_event_init(void)
+{
+ int i;
+
+ for (i = 0; i < VMCI_EVENT_MAX; i++)
+ INIT_LIST_HEAD(&subscriber_array[i]);
+
+ return VMCI_SUCCESS;
+}
+
+void vmci_event_exit(void)
+{
+ int e;
+
+ /* We free all memory at exit. */
+ for (e = 0; e < VMCI_EVENT_MAX; e++) {
+ struct vmci_subscription *cur, *p2;
+ list_for_each_entry_safe(cur, p2, &subscriber_array[e], node) {
+
+ /*
+ * We should never get here because all events
+ * should have been unregistered before we try
+ * to unload the driver module.
+ */
+ pr_warn("Unexpected free events occurring\n");
+ list_del(&cur->node);
+ kfree(cur);
+ }
+ }
+}
+
+/*
+ * Find entry. Assumes subscriber_mutex is held.
+ */
+static struct vmci_subscription *event_find(u32 sub_id)
+{
+ int e;
+
+ for (e = 0; e < VMCI_EVENT_MAX; e++) {
+ struct vmci_subscription *cur;
+ list_for_each_entry(cur, &subscriber_array[e], node) {
+ if (cur->id == sub_id)
+ return cur;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Actually delivers the events to the subscribers.
+ * The callback function for each subscriber is invoked.
+ */
+static void event_deliver(struct vmci_event_msg *event_msg)
+{
+ struct vmci_subscription *cur;
+ struct list_head *subscriber_list;
+
+ rcu_read_lock();
+ subscriber_list = &subscriber_array[event_msg->event_data.event];
+ list_for_each_entry_rcu(cur, subscriber_list, node) {
+ cur->callback(cur->id, &event_msg->event_data,
+ cur->callback_data);
+ }
+ rcu_read_unlock();
+}
+
+/*
+ * Dispatcher for the VMCI_EVENT_RECEIVE datagrams. Calls all
+ * subscribers for given event.
+ */
+int vmci_event_dispatch(struct vmci_datagram *msg)
+{
+ struct vmci_event_msg *event_msg = (struct vmci_event_msg *)msg;
+
+ if (msg->payload_size < sizeof(u32) ||
+ msg->payload_size > sizeof(struct vmci_event_data_max))
+ return VMCI_ERROR_INVALID_ARGS;
+
+ if (!VMCI_EVENT_VALID(event_msg->event_data.event))
+ return VMCI_ERROR_EVENT_UNKNOWN;
+
+ event_deliver(event_msg);
+ return VMCI_SUCCESS;
+}
+
+/*
+ * vmci_event_subscribe() - Subscribe to a given event.
+ * @event: The event to subscribe to.
+ * @callback: The callback to invoke upon the event.
+ * @callback_data: Data to pass to the callback.
+ * @subscription_id: ID used to track subscription. Used with
+ * vmci_event_unsubscribe()
+ *
+ * Subscribes to the provided event. The callback specified will be
+ * fired from RCU critical section and therefore must not sleep.
+ */
+int vmci_event_subscribe(u32 event,
+ vmci_event_cb callback,
+ void *callback_data,
+ u32 *new_subscription_id)
+{
+ struct vmci_subscription *sub;
+ int attempts;
+ int retval;
+ bool have_new_id = false;
+
+ if (!new_subscription_id) {
+ pr_devel("%s: Invalid subscription (NULL)\n", __func__);
+ return VMCI_ERROR_INVALID_ARGS;
+ }
+
+ if (!VMCI_EVENT_VALID(event) || !callback) {
+ pr_devel("%s: Failed to subscribe to event (type=%d) (callback=%p) (data=%p)\n",
+ __func__, event, callback, callback_data);
+ return VMCI_ERROR_INVALID_ARGS;
+ }
+
+ sub = kzalloc(sizeof(*sub), GFP_KERNEL);
+ if (!sub)
+ return VMCI_ERROR_NO_MEM;
+
+ sub->id = VMCI_EVENT_MAX;
+ sub->event = event;
+ sub->callback = callback;
+ sub->callback_data = callback_data;
+ INIT_LIST_HEAD(&sub->node);
+
+ mutex_lock(&subscriber_mutex);
+
+ /* Creation of a new event is always allowed. */
+ for (attempts = 0; attempts < VMCI_EVENT_MAX_ATTEMPTS; attempts++) {
+ static u32 subscription_id;
+ /*
+ * We try to get an id a couple of time before
+ * claiming we are out of resources.
+ */
+
+ /* Test for duplicate id. */
+ if (!event_find(++subscription_id)) {
+ sub->id = subscription_id;
+ have_new_id = true;
+ break;
+ }
+ }
+
+ if (have_new_id) {
+ list_add_rcu(&sub->node, &subscriber_array[event]);
+ retval = VMCI_SUCCESS;
+ } else {
+ retval = VMCI_ERROR_NO_RESOURCES;
+ }
+
+ mutex_unlock(&subscriber_mutex);
+
+ *new_subscription_id = sub->id;
+ return retval;
+}
+EXPORT_SYMBOL_GPL(vmci_event_subscribe);
+
+/*
+ * vmci_event_unsubscribe() - unsubscribe from an event.
+ * @sub_id: A subscription ID as provided by vmci_event_subscribe()
+ *
+ * Unsubscribe from given event. Removes it from list and frees it.
+ * Will return callback_data if requested by caller.
+ */
+int vmci_event_unsubscribe(u32 sub_id)
+{
+ struct vmci_subscription *s;
+
+ mutex_lock(&subscriber_mutex);
+ s = event_find(sub_id);
+ if (s)
+ list_del_rcu(&s->node);
+ mutex_unlock(&subscriber_mutex);
+
+ if (!s)
+ return VMCI_ERROR_NOT_FOUND;
+
+ synchronize_rcu();
+ kfree(s);
+
+ return VMCI_SUCCESS;
+}
+EXPORT_SYMBOL_GPL(vmci_event_unsubscribe);
diff --git a/drivers/misc/vmw_vmci/vmci_event.h b/drivers/misc/vmw_vmci/vmci_event.h
new file mode 100644
index 00000000000..7df9b1c0a96
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_event.h
@@ -0,0 +1,25 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef __VMCI_EVENT_H__
+#define __VMCI_EVENT_H__
+
+#include <linux/vmw_vmci_api.h>
+
+int vmci_event_init(void);
+void vmci_event_exit(void);
+int vmci_event_dispatch(struct vmci_datagram *msg);
+
+#endif /*__VMCI_EVENT_H__ */
diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c
new file mode 100644
index 00000000000..60c01999f48
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_guest.c
@@ -0,0 +1,759 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/vmw_vmci_api.h>
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/highmem.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/vmalloc.h>
+
+#include "vmci_datagram.h"
+#include "vmci_doorbell.h"
+#include "vmci_context.h"
+#include "vmci_driver.h"
+#include "vmci_event.h"
+
+#define PCI_VENDOR_ID_VMWARE 0x15AD
+#define PCI_DEVICE_ID_VMWARE_VMCI 0x0740
+
+#define VMCI_UTIL_NUM_RESOURCES 1
+
+static bool vmci_disable_msi;
+module_param_named(disable_msi, vmci_disable_msi, bool, 0);
+MODULE_PARM_DESC(disable_msi, "Disable MSI use in driver - (default=0)");
+
+static bool vmci_disable_msix;
+module_param_named(disable_msix, vmci_disable_msix, bool, 0);
+MODULE_PARM_DESC(disable_msix, "Disable MSI-X use in driver - (default=0)");
+
+static u32 ctx_update_sub_id = VMCI_INVALID_ID;
+static u32 vm_context_id = VMCI_INVALID_ID;
+
+struct vmci_guest_device {
+ struct device *dev; /* PCI device we are attached to */
+ void __iomem *iobase;
+
+ unsigned int irq;
+ unsigned int intr_type;
+ bool exclusive_vectors;
+ struct msix_entry msix_entries[VMCI_MAX_INTRS];
+
+ struct tasklet_struct datagram_tasklet;
+ struct tasklet_struct bm_tasklet;
+
+ void *data_buffer;
+ void *notification_bitmap;
+};
+
+/* vmci_dev singleton device and supporting data*/
+static struct vmci_guest_device *vmci_dev_g;
+static DEFINE_SPINLOCK(vmci_dev_spinlock);
+
+static atomic_t vmci_num_guest_devices = ATOMIC_INIT(0);
+
+bool vmci_guest_code_active(void)
+{
+ return atomic_read(&vmci_num_guest_devices) != 0;
+}
+
+u32 vmci_get_vm_context_id(void)
+{
+ if (vm_context_id == VMCI_INVALID_ID) {
+ struct vmci_datagram get_cid_msg;
+ get_cid_msg.dst =
+ vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
+ VMCI_GET_CONTEXT_ID);
+ get_cid_msg.src = VMCI_ANON_SRC_HANDLE;
+ get_cid_msg.payload_size = 0;
+ vm_context_id = vmci_send_datagram(&get_cid_msg);
+ }
+ return vm_context_id;
+}
+
+/*
+ * VM to hypervisor call mechanism. We use the standard VMware naming
+ * convention since shared code is calling this function as well.
+ */
+int vmci_send_datagram(struct vmci_datagram *dg)
+{
+ unsigned long flags;
+ int result;
+
+ /* Check args. */
+ if (dg == NULL)
+ return VMCI_ERROR_INVALID_ARGS;
+
+ /*
+ * Need to acquire spinlock on the device because the datagram
+ * data may be spread over multiple pages and the monitor may
+ * interleave device user rpc calls from multiple
+ * VCPUs. Acquiring the spinlock precludes that
+ * possibility. Disabling interrupts to avoid incoming
+ * datagrams during a "rep out" and possibly landing up in
+ * this function.
+ */
+ spin_lock_irqsave(&vmci_dev_spinlock, flags);
+
+ if (vmci_dev_g) {
+ iowrite8_rep(vmci_dev_g->iobase + VMCI_DATA_OUT_ADDR,
+ dg, VMCI_DG_SIZE(dg));
+ result = ioread32(vmci_dev_g->iobase + VMCI_RESULT_LOW_ADDR);
+ } else {
+ result = VMCI_ERROR_UNAVAILABLE;
+ }
+
+ spin_unlock_irqrestore(&vmci_dev_spinlock, flags);
+
+ return result;
+}
+EXPORT_SYMBOL_GPL(vmci_send_datagram);
+
+/*
+ * Gets called with the new context id if updated or resumed.
+ * Context id.
+ */
+static void vmci_guest_cid_update(u32 sub_id,
+ const struct vmci_event_data *event_data,
+ void *client_data)
+{
+ const struct vmci_event_payld_ctx *ev_payload =
+ vmci_event_data_const_payload(event_data);
+
+ if (sub_id != ctx_update_sub_id) {
+ pr_devel("Invalid subscriber (ID=0x%x)\n", sub_id);
+ return;
+ }
+
+ if (!event_data || ev_payload->context_id == VMCI_INVALID_ID) {
+ pr_devel("Invalid event data\n");
+ return;
+ }
+
+ pr_devel("Updating context from (ID=0x%x) to (ID=0x%x) on event (type=%d)\n",
+ vm_context_id, ev_payload->context_id, event_data->event);
+
+ vm_context_id = ev_payload->context_id;
+}
+
+/*
+ * Verify that the host supports the hypercalls we need. If it does not,
+ * try to find fallback hypercalls and use those instead. Returns
+ * true if required hypercalls (or fallback hypercalls) are
+ * supported by the host, false otherwise.
+ */
+static bool vmci_check_host_caps(struct pci_dev *pdev)
+{
+ bool result;
+ struct vmci_resource_query_msg *msg;
+ u32 msg_size = sizeof(struct vmci_resource_query_hdr) +
+ VMCI_UTIL_NUM_RESOURCES * sizeof(u32);
+ struct vmci_datagram *check_msg;
+
+ check_msg = kmalloc(msg_size, GFP_KERNEL);
+ if (!check_msg) {
+ dev_err(&pdev->dev, "%s: Insufficient memory\n", __func__);
+ return false;
+ }
+
+ check_msg->dst = vmci_make_handle(VMCI_HYPERVISOR_CONTEXT_ID,
+ VMCI_RESOURCES_QUERY);
+ check_msg->src = VMCI_ANON_SRC_HANDLE;
+ check_msg->payload_size = msg_size - VMCI_DG_HEADERSIZE;
+ msg = (struct vmci_resource_query_msg *)VMCI_DG_PAYLOAD(check_msg);
+
+ msg->num_resources = VMCI_UTIL_NUM_RESOURCES;
+ msg->resources[0] = VMCI_GET_CONTEXT_ID;
+
+ /* Checks that hyper calls are supported */
+ result = vmci_send_datagram(check_msg) == 0x01;
+ kfree(check_msg);
+
+ dev_dbg(&pdev->dev, "%s: Host capability check: %s\n",
+ __func__, result ? "PASSED" : "FAILED");
+
+ /* We need the vector. There are no fallbacks. */
+ return result;
+}
+
+/*
+ * Reads datagrams from the data in port and dispatches them. We
+ * always start reading datagrams into only the first page of the
+ * datagram buffer. If the datagrams don't fit into one page, we
+ * use the maximum datagram buffer size for the remainder of the
+ * invocation. This is a simple heuristic for not penalizing
+ * small datagrams.
+ *
+ * This function assumes that it has exclusive access to the data
+ * in port for the duration of the call.
+ */
+static void vmci_dispatch_dgs(unsigned long data)
+{
+ struct vmci_guest_device *vmci_dev = (struct vmci_guest_device *)data;
+ u8 *dg_in_buffer = vmci_dev->data_buffer;
+ struct vmci_datagram *dg;
+ size_t dg_in_buffer_size = VMCI_MAX_DG_SIZE;
+ size_t current_dg_in_buffer_size = PAGE_SIZE;
+ size_t remaining_bytes;
+
+ BUILD_BUG_ON(VMCI_MAX_DG_SIZE < PAGE_SIZE);
+
+ ioread8_rep(vmci_dev->iobase + VMCI_DATA_IN_ADDR,
+ vmci_dev->data_buffer, current_dg_in_buffer_size);
+ dg = (struct vmci_datagram *)dg_in_buffer;
+ remaining_bytes = current_dg_in_buffer_size;
+
+ while (dg->dst.resource != VMCI_INVALID_ID ||
+ remaining_bytes > PAGE_SIZE) {
+ unsigned dg_in_size;
+
+ /*
+ * When the input buffer spans multiple pages, a datagram can
+ * start on any page boundary in the buffer.
+ */
+ if (dg->dst.resource == VMCI_INVALID_ID) {
+ dg = (struct vmci_datagram *)roundup(
+ (uintptr_t)dg + 1, PAGE_SIZE);
+ remaining_bytes =
+ (size_t)(dg_in_buffer +
+ current_dg_in_buffer_size -
+ (u8 *)dg);
+ continue;
+ }
+
+ dg_in_size = VMCI_DG_SIZE_ALIGNED(dg);
+
+ if (dg_in_size <= dg_in_buffer_size) {
+ int result;
+
+ /*
+ * If the remaining bytes in the datagram
+ * buffer doesn't contain the complete
+ * datagram, we first make sure we have enough
+ * room for it and then we read the reminder
+ * of the datagram and possibly any following
+ * datagrams.
+ */
+ if (dg_in_size > remaining_bytes) {
+ if (remaining_bytes !=
+ current_dg_in_buffer_size) {
+
+ /*
+ * We move the partial
+ * datagram to the front and
+ * read the reminder of the
+ * datagram and possibly
+ * following calls into the
+ * following bytes.
+ */
+ memmove(dg_in_buffer, dg_in_buffer +
+ current_dg_in_buffer_size -
+ remaining_bytes,
+ remaining_bytes);
+ dg = (struct vmci_datagram *)
+ dg_in_buffer;
+ }
+
+ if (current_dg_in_buffer_size !=
+ dg_in_buffer_size)
+ current_dg_in_buffer_size =
+ dg_in_buffer_size;
+
+ ioread8_rep(vmci_dev->iobase +
+ VMCI_DATA_IN_ADDR,
+ vmci_dev->data_buffer +
+ remaining_bytes,
+ current_dg_in_buffer_size -
+ remaining_bytes);
+ }
+
+ /*
+ * We special case event datagrams from the
+ * hypervisor.
+ */
+ if (dg->src.context == VMCI_HYPERVISOR_CONTEXT_ID &&
+ dg->dst.resource == VMCI_EVENT_HANDLER) {
+ result = vmci_event_dispatch(dg);
+ } else {
+ result = vmci_datagram_invoke_guest_handler(dg);
+ }
+ if (result < VMCI_SUCCESS)
+ dev_dbg(vmci_dev->dev,
+ "Datagram with resource (ID=0x%x) failed (err=%d)\n",
+ dg->dst.resource, result);
+
+ /* On to the next datagram. */
+ dg = (struct vmci_datagram *)((u8 *)dg +
+ dg_in_size);
+ } else {
+ size_t bytes_to_skip;
+
+ /*
+ * Datagram doesn't fit in datagram buffer of maximal
+ * size. We drop it.
+ */
+ dev_dbg(vmci_dev->dev,
+ "Failed to receive datagram (size=%u bytes)\n",
+ dg_in_size);
+
+ bytes_to_skip = dg_in_size - remaining_bytes;
+ if (current_dg_in_buffer_size != dg_in_buffer_size)
+ current_dg_in_buffer_size = dg_in_buffer_size;
+
+ for (;;) {
+ ioread8_rep(vmci_dev->iobase +
+ VMCI_DATA_IN_ADDR,
+ vmci_dev->data_buffer,
+ current_dg_in_buffer_size);
+ if (bytes_to_skip <= current_dg_in_buffer_size)
+ break;
+
+ bytes_to_skip -= current_dg_in_buffer_size;
+ }
+ dg = (struct vmci_datagram *)(dg_in_buffer +
+ bytes_to_skip);
+ }
+
+ remaining_bytes =
+ (size_t) (dg_in_buffer + current_dg_in_buffer_size -
+ (u8 *)dg);
+
+ if (remaining_bytes < VMCI_DG_HEADERSIZE) {
+ /* Get the next batch of datagrams. */
+
+ ioread8_rep(vmci_dev->iobase + VMCI_DATA_IN_ADDR,
+ vmci_dev->data_buffer,
+ current_dg_in_buffer_size);
+ dg = (struct vmci_datagram *)dg_in_buffer;
+ remaining_bytes = current_dg_in_buffer_size;
+ }
+ }
+}
+
+/*
+ * Scans the notification bitmap for raised flags, clears them
+ * and handles the notifications.
+ */
+static void vmci_process_bitmap(unsigned long data)
+{
+ struct vmci_guest_device *dev = (struct vmci_guest_device *)data;
+
+ if (!dev->notification_bitmap) {
+ dev_dbg(dev->dev, "No bitmap present in %s\n", __func__);
+ return;
+ }
+
+ vmci_dbell_scan_notification_entries(dev->notification_bitmap);
+}
+
+/*
+ * Enable MSI-X. Try exclusive vectors first, then shared vectors.
+ */
+static int vmci_enable_msix(struct pci_dev *pdev,
+ struct vmci_guest_device *vmci_dev)
+{
+ int i;
+ int result;
+
+ for (i = 0; i < VMCI_MAX_INTRS; ++i) {
+ vmci_dev->msix_entries[i].entry = i;
+ vmci_dev->msix_entries[i].vector = i;
+ }
+
+ result = pci_enable_msix(pdev, vmci_dev->msix_entries, VMCI_MAX_INTRS);
+ if (result == 0)
+ vmci_dev->exclusive_vectors = true;
+ else if (result > 0)
+ result = pci_enable_msix(pdev, vmci_dev->msix_entries, 1);
+
+ return result;
+}
+
+/*
+ * Interrupt handler for legacy or MSI interrupt, or for first MSI-X
+ * interrupt (vector VMCI_INTR_DATAGRAM).
+ */
+static irqreturn_t vmci_interrupt(int irq, void *_dev)
+{
+ struct vmci_guest_device *dev = _dev;
+
+ /*
+ * If we are using MSI-X with exclusive vectors then we simply schedule
+ * the datagram tasklet, since we know the interrupt was meant for us.
+ * Otherwise we must read the ICR to determine what to do.
+ */
+
+ if (dev->intr_type == VMCI_INTR_TYPE_MSIX && dev->exclusive_vectors) {
+ tasklet_schedule(&dev->datagram_tasklet);
+ } else {
+ unsigned int icr;
+
+ /* Acknowledge interrupt and determine what needs doing. */
+ icr = ioread32(dev->iobase + VMCI_ICR_ADDR);
+ if (icr == 0 || icr == ~0)
+ return IRQ_NONE;
+
+ if (icr & VMCI_ICR_DATAGRAM) {
+ tasklet_schedule(&dev->datagram_tasklet);
+ icr &= ~VMCI_ICR_DATAGRAM;
+ }
+
+ if (icr & VMCI_ICR_NOTIFICATION) {
+ tasklet_schedule(&dev->bm_tasklet);
+ icr &= ~VMCI_ICR_NOTIFICATION;
+ }
+
+ if (icr != 0)
+ dev_warn(dev->dev,
+ "Ignoring unknown interrupt cause (%d)\n",
+ icr);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Interrupt handler for MSI-X interrupt vector VMCI_INTR_NOTIFICATION,
+ * which is for the notification bitmap. Will only get called if we are
+ * using MSI-X with exclusive vectors.
+ */
+static irqreturn_t vmci_interrupt_bm(int irq, void *_dev)
+{
+ struct vmci_guest_device *dev = _dev;
+
+ /* For MSI-X we can just assume it was meant for us. */
+ tasklet_schedule(&dev->bm_tasklet);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Most of the initialization at module load time is done here.
+ */
+static int vmci_guest_probe_device(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct vmci_guest_device *vmci_dev;
+ void __iomem *iobase;
+ unsigned int capabilities;
+ unsigned long cmd;
+ int vmci_err;
+ int error;
+
+ dev_dbg(&pdev->dev, "Probing for vmci/PCI guest device\n");
+
+ error = pcim_enable_device(pdev);
+ if (error) {
+ dev_err(&pdev->dev,
+ "Failed to enable VMCI device: %d\n", error);
+ return error;
+ }
+
+ error = pcim_iomap_regions(pdev, 1 << 0, KBUILD_MODNAME);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to reserve/map IO regions\n");
+ return error;
+ }
+
+ iobase = pcim_iomap_table(pdev)[0];
+
+ dev_info(&pdev->dev, "Found VMCI PCI device at %#lx, irq %u\n",
+ (unsigned long)iobase, pdev->irq);
+
+ vmci_dev = devm_kzalloc(&pdev->dev, sizeof(*vmci_dev), GFP_KERNEL);
+ if (!vmci_dev) {
+ dev_err(&pdev->dev,
+ "Can't allocate memory for VMCI device\n");
+ return -ENOMEM;
+ }
+
+ vmci_dev->dev = &pdev->dev;
+ vmci_dev->intr_type = VMCI_INTR_TYPE_INTX;
+ vmci_dev->exclusive_vectors = false;
+ vmci_dev->iobase = iobase;
+
+ tasklet_init(&vmci_dev->datagram_tasklet,
+ vmci_dispatch_dgs, (unsigned long)vmci_dev);
+ tasklet_init(&vmci_dev->bm_tasklet,
+ vmci_process_bitmap, (unsigned long)vmci_dev);
+
+ vmci_dev->data_buffer = vmalloc(VMCI_MAX_DG_SIZE);
+ if (!vmci_dev->data_buffer) {
+ dev_err(&pdev->dev,
+ "Can't allocate memory for datagram buffer\n");
+ return -ENOMEM;
+ }
+
+ pci_set_master(pdev); /* To enable queue_pair functionality. */
+
+ /*
+ * Verify that the VMCI Device supports the capabilities that
+ * we need. If the device is missing capabilities that we would
+ * like to use, check for fallback capabilities and use those
+ * instead (so we can run a new VM on old hosts). Fail the load if
+ * a required capability is missing and there is no fallback.
+ *
+ * Right now, we need datagrams. There are no fallbacks.
+ */
+ capabilities = ioread32(vmci_dev->iobase + VMCI_CAPS_ADDR);
+ if (!(capabilities & VMCI_CAPS_DATAGRAM)) {
+ dev_err(&pdev->dev, "Device does not support datagrams\n");
+ error = -ENXIO;
+ goto err_free_data_buffer;
+ }
+
+ /*
+ * If the hardware supports notifications, we will use that as
+ * well.
+ */
+ if (capabilities & VMCI_CAPS_NOTIFICATIONS) {
+ vmci_dev->notification_bitmap = vmalloc(PAGE_SIZE);
+ if (!vmci_dev->notification_bitmap) {
+ dev_warn(&pdev->dev,
+ "Unable to allocate notification bitmap\n");
+ } else {
+ memset(vmci_dev->notification_bitmap, 0, PAGE_SIZE);
+ capabilities |= VMCI_CAPS_NOTIFICATIONS;
+ }
+ }
+
+ dev_info(&pdev->dev, "Using capabilities 0x%x\n", capabilities);
+
+ /* Let the host know which capabilities we intend to use. */
+ iowrite32(capabilities, vmci_dev->iobase + VMCI_CAPS_ADDR);
+
+ /* Set up global device so that we can start sending datagrams */
+ spin_lock_irq(&vmci_dev_spinlock);
+ vmci_dev_g = vmci_dev;
+ spin_unlock_irq(&vmci_dev_spinlock);
+
+ /*
+ * Register notification bitmap with device if that capability is
+ * used.
+ */
+ if (capabilities & VMCI_CAPS_NOTIFICATIONS) {
+ struct page *page =
+ vmalloc_to_page(vmci_dev->notification_bitmap);
+ unsigned long bitmap_ppn = page_to_pfn(page);
+ if (!vmci_dbell_register_notification_bitmap(bitmap_ppn)) {
+ dev_warn(&pdev->dev,
+ "VMCI device unable to register notification bitmap with PPN 0x%x\n",
+ (u32) bitmap_ppn);
+ goto err_remove_vmci_dev_g;
+ }
+ }
+
+ /* Check host capabilities. */
+ if (!vmci_check_host_caps(pdev))
+ goto err_remove_bitmap;
+
+ /* Enable device. */
+
+ /*
+ * We subscribe to the VMCI_EVENT_CTX_ID_UPDATE here so we can
+ * update the internal context id when needed.
+ */
+ vmci_err = vmci_event_subscribe(VMCI_EVENT_CTX_ID_UPDATE,
+ vmci_guest_cid_update, NULL,
+ &ctx_update_sub_id);
+ if (vmci_err < VMCI_SUCCESS)
+ dev_warn(&pdev->dev,
+ "Failed to subscribe to event (type=%d): %d\n",
+ VMCI_EVENT_CTX_ID_UPDATE, vmci_err);
+
+ /*
+ * Enable interrupts. Try MSI-X first, then MSI, and then fallback on
+ * legacy interrupts.
+ */
+ if (!vmci_disable_msix && !vmci_enable_msix(pdev, vmci_dev)) {
+ vmci_dev->intr_type = VMCI_INTR_TYPE_MSIX;
+ vmci_dev->irq = vmci_dev->msix_entries[0].vector;
+ } else if (!vmci_disable_msi && !pci_enable_msi(pdev)) {
+ vmci_dev->intr_type = VMCI_INTR_TYPE_MSI;
+ vmci_dev->irq = pdev->irq;
+ } else {
+ vmci_dev->intr_type = VMCI_INTR_TYPE_INTX;
+ vmci_dev->irq = pdev->irq;
+ }
+
+ /*
+ * Request IRQ for legacy or MSI interrupts, or for first
+ * MSI-X vector.
+ */
+ error = request_irq(vmci_dev->irq, vmci_interrupt, IRQF_SHARED,
+ KBUILD_MODNAME, vmci_dev);
+ if (error) {
+ dev_err(&pdev->dev, "Irq %u in use: %d\n",
+ vmci_dev->irq, error);
+ goto err_disable_msi;
+ }
+
+ /*
+ * For MSI-X with exclusive vectors we need to request an
+ * interrupt for each vector so that we get a separate
+ * interrupt handler routine. This allows us to distinguish
+ * between the vectors.
+ */
+ if (vmci_dev->exclusive_vectors) {
+ error = request_irq(vmci_dev->msix_entries[1].vector,
+ vmci_interrupt_bm, 0, KBUILD_MODNAME,
+ vmci_dev);
+ if (error) {
+ dev_err(&pdev->dev,
+ "Failed to allocate irq %u: %d\n",
+ vmci_dev->msix_entries[1].vector, error);
+ goto err_free_irq;
+ }
+ }
+
+ dev_dbg(&pdev->dev, "Registered device\n");
+
+ atomic_inc(&vmci_num_guest_devices);
+
+ /* Enable specific interrupt bits. */
+ cmd = VMCI_IMR_DATAGRAM;
+ if (capabilities & VMCI_CAPS_NOTIFICATIONS)
+ cmd |= VMCI_IMR_NOTIFICATION;
+ iowrite32(cmd, vmci_dev->iobase + VMCI_IMR_ADDR);
+
+ /* Enable interrupts. */
+ iowrite32(VMCI_CONTROL_INT_ENABLE,
+ vmci_dev->iobase + VMCI_CONTROL_ADDR);
+
+ pci_set_drvdata(pdev, vmci_dev);
+ return 0;
+
+err_free_irq:
+ free_irq(vmci_dev->irq, &vmci_dev);
+ tasklet_kill(&vmci_dev->datagram_tasklet);
+ tasklet_kill(&vmci_dev->bm_tasklet);
+
+err_disable_msi:
+ if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSIX)
+ pci_disable_msix(pdev);
+ else if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSI)
+ pci_disable_msi(pdev);
+
+ vmci_err = vmci_event_unsubscribe(ctx_update_sub_id);
+ if (vmci_err < VMCI_SUCCESS)
+ dev_warn(&pdev->dev,
+ "Failed to unsubscribe from event (type=%d) with subscriber (ID=0x%x): %d\n",
+ VMCI_EVENT_CTX_ID_UPDATE, ctx_update_sub_id, vmci_err);
+
+err_remove_bitmap:
+ if (vmci_dev->notification_bitmap) {
+ iowrite32(VMCI_CONTROL_RESET,
+ vmci_dev->iobase + VMCI_CONTROL_ADDR);
+ vfree(vmci_dev->notification_bitmap);
+ }
+
+err_remove_vmci_dev_g:
+ spin_lock_irq(&vmci_dev_spinlock);
+ vmci_dev_g = NULL;
+ spin_unlock_irq(&vmci_dev_spinlock);
+
+err_free_data_buffer:
+ vfree(vmci_dev->data_buffer);
+
+ /* The rest are managed resources and will be freed by PCI core */
+ return error;
+}
+
+static void vmci_guest_remove_device(struct pci_dev *pdev)
+{
+ struct vmci_guest_device *vmci_dev = pci_get_drvdata(pdev);
+ int vmci_err;
+
+ dev_dbg(&pdev->dev, "Removing device\n");
+
+ atomic_dec(&vmci_num_guest_devices);
+
+ vmci_qp_guest_endpoints_exit();
+
+ vmci_err = vmci_event_unsubscribe(ctx_update_sub_id);
+ if (vmci_err < VMCI_SUCCESS)
+ dev_warn(&pdev->dev,
+ "Failed to unsubscribe from event (type=%d) with subscriber (ID=0x%x): %d\n",
+ VMCI_EVENT_CTX_ID_UPDATE, ctx_update_sub_id, vmci_err);
+
+ spin_lock_irq(&vmci_dev_spinlock);
+ vmci_dev_g = NULL;
+ spin_unlock_irq(&vmci_dev_spinlock);
+
+ dev_dbg(&pdev->dev, "Resetting vmci device\n");
+ iowrite32(VMCI_CONTROL_RESET, vmci_dev->iobase + VMCI_CONTROL_ADDR);
+
+ /*
+ * Free IRQ and then disable MSI/MSI-X as appropriate. For
+ * MSI-X, we might have multiple vectors, each with their own
+ * IRQ, which we must free too.
+ */
+ free_irq(vmci_dev->irq, vmci_dev);
+ if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSIX) {
+ if (vmci_dev->exclusive_vectors)
+ free_irq(vmci_dev->msix_entries[1].vector, vmci_dev);
+ pci_disable_msix(pdev);
+ } else if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSI) {
+ pci_disable_msi(pdev);
+ }
+
+ tasklet_kill(&vmci_dev->datagram_tasklet);
+ tasklet_kill(&vmci_dev->bm_tasklet);
+
+ if (vmci_dev->notification_bitmap) {
+ /*
+ * The device reset above cleared the bitmap state of the
+ * device, so we can safely free it here.
+ */
+
+ vfree(vmci_dev->notification_bitmap);
+ }
+
+ vfree(vmci_dev->data_buffer);
+
+ /* The rest are managed resources and will be freed by PCI core */
+}
+
+static DEFINE_PCI_DEVICE_TABLE(vmci_ids) = {
+ { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_VMCI), },
+ { 0 },
+};
+MODULE_DEVICE_TABLE(pci, vmci_ids);
+
+static struct pci_driver vmci_guest_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = vmci_ids,
+ .probe = vmci_guest_probe_device,
+ .remove = vmci_guest_remove_device,
+};
+
+int __init vmci_guest_init(void)
+{
+ return pci_register_driver(&vmci_guest_driver);
+}
+
+void __exit vmci_guest_exit(void)
+{
+ pci_unregister_driver(&vmci_guest_driver);
+}
diff --git a/drivers/misc/vmw_vmci/vmci_handle_array.c b/drivers/misc/vmw_vmci/vmci_handle_array.c
new file mode 100644
index 00000000000..344973a0fb0
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_handle_array.c
@@ -0,0 +1,142 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/slab.h>
+#include "vmci_handle_array.h"
+
+static size_t handle_arr_calc_size(size_t capacity)
+{
+ return sizeof(struct vmci_handle_arr) +
+ capacity * sizeof(struct vmci_handle);
+}
+
+struct vmci_handle_arr *vmci_handle_arr_create(size_t capacity)
+{
+ struct vmci_handle_arr *array;
+
+ if (capacity == 0)
+ capacity = VMCI_HANDLE_ARRAY_DEFAULT_SIZE;
+
+ array = kmalloc(handle_arr_calc_size(capacity), GFP_ATOMIC);
+ if (!array)
+ return NULL;
+
+ array->capacity = capacity;
+ array->size = 0;
+
+ return array;
+}
+
+void vmci_handle_arr_destroy(struct vmci_handle_arr *array)
+{
+ kfree(array);
+}
+
+void vmci_handle_arr_append_entry(struct vmci_handle_arr **array_ptr,
+ struct vmci_handle handle)
+{
+ struct vmci_handle_arr *array = *array_ptr;
+
+ if (unlikely(array->size >= array->capacity)) {
+ /* reallocate. */
+ struct vmci_handle_arr *new_array;
+ size_t new_capacity = array->capacity * VMCI_ARR_CAP_MULT;
+ size_t new_size = handle_arr_calc_size(new_capacity);
+
+ new_array = krealloc(array, new_size, GFP_ATOMIC);
+ if (!new_array)
+ return;
+
+ new_array->capacity = new_capacity;
+ *array_ptr = array = new_array;
+ }
+
+ array->entries[array->size] = handle;
+ array->size++;
+}
+
+/*
+ * Handle that was removed, VMCI_INVALID_HANDLE if entry not found.
+ */
+struct vmci_handle vmci_handle_arr_remove_entry(struct vmci_handle_arr *array,
+ struct vmci_handle entry_handle)
+{
+ struct vmci_handle handle = VMCI_INVALID_HANDLE;
+ size_t i;
+
+ for (i = 0; i < array->size; i++) {
+ if (vmci_handle_is_equal(array->entries[i], entry_handle)) {
+ handle = array->entries[i];
+ array->size--;
+ array->entries[i] = array->entries[array->size];
+ array->entries[array->size] = VMCI_INVALID_HANDLE;
+ break;
+ }
+ }
+
+ return handle;
+}
+
+/*
+ * Handle that was removed, VMCI_INVALID_HANDLE if array was empty.
+ */
+struct vmci_handle vmci_handle_arr_remove_tail(struct vmci_handle_arr *array)
+{
+ struct vmci_handle handle = VMCI_INVALID_HANDLE;
+
+ if (array->size) {
+ array->size--;
+ handle = array->entries[array->size];
+ array->entries[array->size] = VMCI_INVALID_HANDLE;
+ }
+
+ return handle;
+}
+
+/*
+ * Handle at given index, VMCI_INVALID_HANDLE if invalid index.
+ */
+struct vmci_handle
+vmci_handle_arr_get_entry(const struct vmci_handle_arr *array, size_t index)
+{
+ if (unlikely(index >= array->size))
+ return VMCI_INVALID_HANDLE;
+
+ return array->entries[index];
+}
+
+bool vmci_handle_arr_has_entry(const struct vmci_handle_arr *array,
+ struct vmci_handle entry_handle)
+{
+ size_t i;
+
+ for (i = 0; i < array->size; i++)
+ if (vmci_handle_is_equal(array->entries[i], entry_handle))
+ return true;
+
+ return false;
+}
+
+/*
+ * NULL if the array is empty. Otherwise, a pointer to the array
+ * of VMCI handles in the handle array.
+ */
+struct vmci_handle *vmci_handle_arr_get_handles(struct vmci_handle_arr *array)
+{
+ if (array->size)
+ return array->entries;
+
+ return NULL;
+}
diff --git a/drivers/misc/vmw_vmci/vmci_handle_array.h b/drivers/misc/vmw_vmci/vmci_handle_array.h
new file mode 100644
index 00000000000..b5f3a7f98cf
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_handle_array.h
@@ -0,0 +1,52 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef _VMCI_HANDLE_ARRAY_H_
+#define _VMCI_HANDLE_ARRAY_H_
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/types.h>
+
+#define VMCI_HANDLE_ARRAY_DEFAULT_SIZE 4
+#define VMCI_ARR_CAP_MULT 2 /* Array capacity multiplier */
+
+struct vmci_handle_arr {
+ size_t capacity;
+ size_t size;
+ struct vmci_handle entries[];
+};
+
+struct vmci_handle_arr *vmci_handle_arr_create(size_t capacity);
+void vmci_handle_arr_destroy(struct vmci_handle_arr *array);
+void vmci_handle_arr_append_entry(struct vmci_handle_arr **array_ptr,
+ struct vmci_handle handle);
+struct vmci_handle vmci_handle_arr_remove_entry(struct vmci_handle_arr *array,
+ struct vmci_handle
+ entry_handle);
+struct vmci_handle vmci_handle_arr_remove_tail(struct vmci_handle_arr *array);
+struct vmci_handle
+vmci_handle_arr_get_entry(const struct vmci_handle_arr *array, size_t index);
+bool vmci_handle_arr_has_entry(const struct vmci_handle_arr *array,
+ struct vmci_handle entry_handle);
+struct vmci_handle *vmci_handle_arr_get_handles(struct vmci_handle_arr *array);
+
+static inline size_t vmci_handle_arr_get_size(
+ const struct vmci_handle_arr *array)
+{
+ return array->size;
+}
+
+
+#endif /* _VMCI_HANDLE_ARRAY_H_ */
diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c
new file mode 100644
index 00000000000..d4722b3dc8e
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_host.c
@@ -0,0 +1,1043 @@
+/*
+ * VMware VMCI Driver
+ *
+ * Copyright (C) 2012 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/vmw_vmci_defs.h>
+#include <linux/vmw_vmci_api.h>
+#include <linux/moduleparam.h>
+#include <linux/miscdevice.h>
+#include <linux/interrupt.h>
+#include <linux/highmem.h>
+#include <linux/atomic.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/file.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/pci.h>
+#include <linux/smp.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+
+#include "vmci_handle_array.h"
+#include "vmci_queue_pair.h"
+#include "vmci_datagram.h"
+#include "vmci_doorbell.h"
+#include "vmci_resource.h"
+#include "vmci_context.h"
+#include "vmci_driver.h"
+#include "vmci_event.h"
+
+#define VMCI_UTIL_NUM_RESOURCES 1
+
+enum {
+ VMCI_NOTIFY_RESOURCE_QUEUE_PAIR = 0,
+ VMCI_NOTIFY_RESOURCE_DOOR_BELL = 1,
+};
+
+enum {
+ VMCI_NOTIFY_RESOURCE_ACTION_NOTIFY = 0,
+ VMCI_NOTIFY_RESOURCE_ACTION_CREATE = 1,
+ VMCI_NOTIFY_RESOURCE_ACTION_DESTROY = 2,
+};
+
+/*
+ * VMCI driver initialization. This block can also be used to
+ * pass initial group membership etc.
+ */
+struct vmci_init_blk {
+ u32 cid;
+ u32 flags;
+};
+
+/* VMCIqueue_pairAllocInfo_VMToVM */
+struct vmci_qp_alloc_info_vmvm {
+ struct vmci_handle handle;
+ u32 peer;
+ u32 flags;
+ u64 produce_size;
+ u64 consume_size;
+ u64 produce_page_file; /* User VA. */
+ u64 consume_page_file; /* User VA. */
+ u64 produce_page_file_size; /* Size of the file name array. */
+ u64 consume_page_file_size; /* Size of the file name array. */
+ s32 result;
+ u32 _pad;
+};
+
+/* VMCISetNotifyInfo: Used to pass notify flag's address to the host driver. */
+struct vmci_set_notify_info {
+ u64 notify_uva;
+ s32 result;
+ u32 _pad;
+};
+
+/*
+ * Per-instance host state
+ */
+struct vmci_host_dev {
+ struct vmci_ctx *context;
+ int user_version;
+ enum vmci_obj_type ct_type;
+ struct mutex lock; /* Mutex lock for vmci context access */
+};
+
+static struct vmci_ctx *host_context;
+static bool vmci_host_device_initialized;
+static atomic_t vmci_host_active_users = ATOMIC_INIT(0);
+
+/*
+ * Determines whether the VMCI host personality is
+ * available. Since the core functionality of the host driver is
+ * always present, all guests could possibly use the host
+ * personality. However, to minimize the deviation from the
+ * pre-unified driver state of affairs, we only consider the host
+ * device active if there is no active guest device or if there
+ * are VMX'en with active VMCI contexts using the host device.
+ */
+bool vmci_host_code_active(void)
+{
+ return vmci_host_device_initialized &&
+ (!vmci_guest_code_active() ||
+ atomic_read(&vmci_host_active_users) > 0);
+}
+
+/*
+ * Called on open of /dev/vmci.
+ */
+static int vmci_host_open(struct inode *inode, struct file *filp)
+{
+ struct vmci_host_dev *vmci_host_dev;
+
+ vmci_host_dev = kzalloc(sizeof(struct vmci_host_dev), GFP_KERNEL);
+ if (vmci_host_dev == NULL)
+ return -ENOMEM;
+
+ vmci_host_dev->ct_type = VMCIOBJ_NOT_SET;
+ mutex_init(&vmci_host_dev->lock);
+ filp->private_data = vmci_host_dev;
+
+ return 0;
+}
+
+/*
+ * Called on close of /dev/vmci, most often when the process
+ * exits.
+ */
+static int vmci_host_close(struct inode *inode, struct file *filp)
+{
+ struct vmci_host_dev *vmci_host_dev = filp->private_data;
+
+ if (vmci_host_dev->ct_type == VMCIOBJ_CONTEXT) {
+ vmci_ctx_destroy(vmci_host_dev->context);
+ vmci_host_dev->context = NULL;
+
+ /*
+ * The number of active contexts is used to track whether any
+ * VMX'en are using the host personality. It is incremented when
+ * a context is created through the IOCTL_VMCI_INIT_CONTEXT
+ * ioctl.
+ */
+ atomic_dec(&vmci_host_active_users);
+ }
+ vmci_host_dev->ct_type = VMCIOBJ_NOT_SET;
+
+ kfree(vmci_host_dev);
+ filp->private_data = NULL;
+ return 0;
+}
+
+/*
+ * This is used to wake up the VMX when a VMCI call arrives, or
+ * to wake up select() or poll() at the next clock tick.
+ */
+static unsigned int vmci_host_poll(struct file *filp, poll_table *wait)
+{
+ struct vmci_host_dev *vmci_host_dev = filp->private_data;
+ struct vmci_ctx *context = vmci_host_dev->context;
+ unsigned int mask = 0;
+
+ if (vmci_host_dev->ct_type == VMCIOBJ_CONTEXT) {
+ /* Check for VMCI calls to this VM context. */
+ if (wait)
+ poll_wait(filp, &context->host_context.wait_queue,
+ wait);
+
+ spin_lock(&context->lock);
+ if (context->pending_datagrams > 0 ||
+ vmci_handle_arr_get_size(
+ context->pending_doorbell_array) > 0) {
+ mask = POLLIN;
+ }
+ spin_unlock(&context->lock);
+ }
+ return mask;
+}
+
+/*
+ * Copies the handles of a handle array into a user buffer, and
+ * returns the new length in userBufferSize. If the copy to the
+ * user buffer fails, the functions still returns VMCI_SUCCESS,
+ * but retval != 0.
+ */
+static int drv_cp_harray_to_user(void __user *user_buf_uva,
+ u64 *user_buf_size,
+ struct vmci_handle_arr *handle_array,
+ int *retval)
+{
+ u32 array_size = 0;
+ struct vmci_handle *handles;
+
+ if (handle_array)
+ array_size = vmci_handle_arr_get_size(handle_array);
+
+ if (array_size * sizeof(*handles) > *user_buf_size)
+ return VMCI_ERROR_MORE_DATA;
+
+ *user_buf_size = array_size * sizeof(*handles);
+ if (*user_buf_size)
+ *retval = copy_to_user(user_buf_uva,
+ vmci_handle_arr_get_handles
+ (handle_array), *user_buf_size);
+
+ return VMCI_SUCCESS;
+}
+
+/*
+ * Sets up a given context for notify to work. Calls drv_map_bool_ptr()
+ * which maps the notify boolean in user VA in kernel space.
+ */
+static int vmci_host_setup_notify(struct vmci_ctx *context,
+ unsigned long uva)
+{
+ struct page *page;
+ int retval;
+
+ if (context->notify_page) {
+ pr_devel("%s: Notify mechanism is already set up\n", __func__);
+ return VMCI_ERROR_DUPLICATE_ENTRY;
+ }
+
+ /*
+ * We are using 'bool' internally, but let's make sure we explicit
+ * about the size.
+ */
+ BUILD_BUG_ON(sizeof(bool) != sizeof(u8));
+ if (!access_ok(VERIFY_WRITE, (void __user *)uva, sizeof(u8)))
+ return VMCI_ERROR_GENERIC;
+
+ /*
+ * Lock physical page backing a given user VA.
+ */
+ down_read(&current->mm->mmap_sem);
+ retval = get_user_pages(current, current->mm,
+ PAGE_ALIGN(uva),
+ 1, 1, 0, &page, NULL);
+ up_read(&current->mm->mmap_sem);
+ if (retval != 1)
+ return VMCI_ERROR_GENERIC;
+
+ /*
+ * Map the locked page and set up notify pointer.
+ */
+ context->notify = kmap(page) + (uva & (PAGE_SIZE - 1));
+ vmci_ctx_check_signal_notify(context);
+
+ return VMCI_SUCCESS;
+}
+
+static int vmci_host_get_version(struct vmci_host_dev *vmci_host_dev,
+ unsigned int cmd, void __user *uptr)
+{
+ if (cmd == IOCTL_VMCI_VERSION2) {
+ int __user *vptr = uptr;
+ if (get_user(vmci_host_dev->user_version, vptr))
+ return -EFAULT;
+ }
+
+ /*
+ * The basic logic here is:
+ *
+ * If the user sends in a version of 0 tell it our version.
+ * If the user didn't send in a version, tell it our version.
+ * If the user sent in an old version, tell it -its- version.
+ * If the user sent in an newer version, tell it our version.
+ *
+ * The rationale behind telling the caller its version is that
+ * Workstation 6.5 required that VMX and VMCI kernel module were
+ * version sync'd. All new VMX users will be programmed to
+ * handle the VMCI kernel module version.
+ */
+
+ if (vmci_host_dev->user_version > 0 &&
+ vmci_host_dev->user_version < VMCI_VERSION_HOSTQP) {
+ return vmci_host_dev->user_version;
+ }
+
+ return VMCI_VERSION;
+}
+
+#define vmci_ioctl_err(fmt, ...) \
+ pr_devel("%s: " fmt, ioctl_name, ##__VA_ARGS__)
+
+static int vmci_host_do_init_context(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_init_blk init_block;
+ const struct cred *cred;
+ int retval;
+
+ if (copy_from_user(&init_block, uptr, sizeof(init_block))) {
+ vmci_ioctl_err("error reading init block\n");
+ return -EFAULT;
+ }
+
+ mutex_lock(&vmci_host_dev->lock);
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_NOT_SET) {
+ vmci_ioctl_err("received VMCI init on initialized handle\n");
+ retval = -EINVAL;
+ goto out;
+ }
+
+ if (init_block.flags & ~VMCI_PRIVILEGE_FLAG_RESTRICTED) {
+ vmci_ioctl_err("unsupported VMCI restriction flag\n");
+ retval = -EINVAL;
+ goto out;
+ }
+
+ cred = get_current_cred();
+ vmci_host_dev->context = vmci_ctx_create(init_block.cid,
+ init_block.flags, 0,
+ vmci_host_dev->user_version,
+ cred);
+ put_cred(cred);
+ if (IS_ERR(vmci_host_dev->context)) {
+ retval = PTR_ERR(vmci_host_dev->context);
+ vmci_ioctl_err("error initializing context\n");
+ goto out;
+ }
+
+ /*
+ * Copy cid to userlevel, we do this to allow the VMX
+ * to enforce its policy on cid generation.
+ */
+ init_block.cid = vmci_ctx_get_id(vmci_host_dev->context);
+ if (copy_to_user(uptr, &init_block, sizeof(init_block))) {
+ vmci_ctx_destroy(vmci_host_dev->context);
+ vmci_host_dev->context = NULL;
+ vmci_ioctl_err("error writing init block\n");
+ retval = -EFAULT;
+ goto out;
+ }
+
+ vmci_host_dev->ct_type = VMCIOBJ_CONTEXT;
+ atomic_inc(&vmci_host_active_users);
+
+ retval = 0;
+
+out:
+ mutex_unlock(&vmci_host_dev->lock);
+ return retval;
+}
+
+static int vmci_host_do_send_datagram(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_datagram_snd_rcv_info send_info;
+ struct vmci_datagram *dg = NULL;
+ u32 cid;
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
+ vmci_ioctl_err("only valid for contexts\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&send_info, uptr, sizeof(send_info)))
+ return -EFAULT;
+
+ if (send_info.len > VMCI_MAX_DG_SIZE) {
+ vmci_ioctl_err("datagram is too big (size=%d)\n",
+ send_info.len);
+ return -EINVAL;
+ }
+
+ if (send_info.len < sizeof(*dg)) {
+ vmci_ioctl_err("datagram is too small (size=%d)\n",
+ send_info.len);
+ return -EINVAL;
+ }
+
+ dg = kmalloc(send_info.len, GFP_KERNEL);
+ if (!dg) {
+ vmci_ioctl_err(
+ "cannot allocate memory to dispatch datagram\n");
+ return -ENOMEM;
+ }
+
+ if (copy_from_user(dg, (void __user *)(uintptr_t)send_info.addr,
+ send_info.len)) {
+ vmci_ioctl_err("error getting datagram\n");
+ kfree(dg);
+ return -EFAULT;
+ }
+
+ pr_devel("Datagram dst (handle=0x%x:0x%x) src (handle=0x%x:0x%x), payload (size=%llu bytes)\n",
+ dg->dst.context, dg->dst.resource,
+ dg->src.context, dg->src.resource,
+ (unsigned long long)dg->payload_size);
+
+ /* Get source context id. */
+ cid = vmci_ctx_get_id(vmci_host_dev->context);
+ send_info.result = vmci_datagram_dispatch(cid, dg, true);
+ kfree(dg);
+
+ return copy_to_user(uptr, &send_info, sizeof(send_info)) ? -EFAULT : 0;
+}
+
+static int vmci_host_do_receive_datagram(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_datagram_snd_rcv_info recv_info;
+ struct vmci_datagram *dg = NULL;
+ int retval;
+ size_t size;
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
+ vmci_ioctl_err("only valid for contexts\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&recv_info, uptr, sizeof(recv_info)))
+ return -EFAULT;
+
+ size = recv_info.len;
+ recv_info.result = vmci_ctx_dequeue_datagram(vmci_host_dev->context,
+ &size, &dg);
+
+ if (recv_info.result >= VMCI_SUCCESS) {
+ void __user *ubuf = (void __user *)(uintptr_t)recv_info.addr;
+ retval = copy_to_user(ubuf, dg, VMCI_DG_SIZE(dg));
+ kfree(dg);
+ if (retval != 0)
+ return -EFAULT;
+ }
+
+ return copy_to_user(uptr, &recv_info, sizeof(recv_info)) ? -EFAULT : 0;
+}
+
+static int vmci_host_do_alloc_queuepair(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_handle handle;
+ int vmci_status;
+ int __user *retptr;
+ u32 cid;
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
+ vmci_ioctl_err("only valid for contexts\n");
+ return -EINVAL;
+ }
+
+ cid = vmci_ctx_get_id(vmci_host_dev->context);
+
+ if (vmci_host_dev->user_version < VMCI_VERSION_NOVMVM) {
+ struct vmci_qp_alloc_info_vmvm alloc_info;
+ struct vmci_qp_alloc_info_vmvm __user *info = uptr;
+
+ if (copy_from_user(&alloc_info, uptr, sizeof(alloc_info)))
+ return -EFAULT;
+
+ handle = alloc_info.handle;
+ retptr = &info->result;
+
+ vmci_status = vmci_qp_broker_alloc(alloc_info.handle,
+ alloc_info.peer,
+ alloc_info.flags,
+ VMCI_NO_PRIVILEGE_FLAGS,
+ alloc_info.produce_size,
+ alloc_info.consume_size,
+ NULL,
+ vmci_host_dev->context);
+
+ if (vmci_status == VMCI_SUCCESS)
+ vmci_status = VMCI_SUCCESS_QUEUEPAIR_CREATE;
+ } else {
+ struct vmci_qp_alloc_info alloc_info;
+ struct vmci_qp_alloc_info __user *info = uptr;
+ struct vmci_qp_page_store page_store;
+
+ if (copy_from_user(&alloc_info, uptr, sizeof(alloc_info)))
+ return -EFAULT;
+
+ handle = alloc_info.handle;
+ retptr = &info->result;
+
+ page_store.pages = alloc_info.ppn_va;
+ page_store.len = alloc_info.num_ppns;
+
+ vmci_status = vmci_qp_broker_alloc(alloc_info.handle,
+ alloc_info.peer,
+ alloc_info.flags,
+ VMCI_NO_PRIVILEGE_FLAGS,
+ alloc_info.produce_size,
+ alloc_info.consume_size,
+ &page_store,
+ vmci_host_dev->context);
+ }
+
+ if (put_user(vmci_status, retptr)) {
+ if (vmci_status >= VMCI_SUCCESS) {
+ vmci_status = vmci_qp_broker_detach(handle,
+ vmci_host_dev->context);
+ }
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int vmci_host_do_queuepair_setva(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_qp_set_va_info set_va_info;
+ struct vmci_qp_set_va_info __user *info = uptr;
+ s32 result;
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
+ vmci_ioctl_err("only valid for contexts\n");
+ return -EINVAL;
+ }
+
+ if (vmci_host_dev->user_version < VMCI_VERSION_NOVMVM) {
+ vmci_ioctl_err("is not allowed\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&set_va_info, uptr, sizeof(set_va_info)))
+ return -EFAULT;
+
+ if (set_va_info.va) {
+ /*
+ * VMX is passing down a new VA for the queue
+ * pair mapping.
+ */
+ result = vmci_qp_broker_map(set_va_info.handle,
+ vmci_host_dev->context,
+ set_va_info.va);
+ } else {
+ /*
+ * The queue pair is about to be unmapped by
+ * the VMX.
+ */
+ result = vmci_qp_broker_unmap(set_va_info.handle,
+ vmci_host_dev->context, 0);
+ }
+
+ return put_user(result, &info->result) ? -EFAULT : 0;
+}
+
+static int vmci_host_do_queuepair_setpf(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_qp_page_file_info page_file_info;
+ struct vmci_qp_page_file_info __user *info = uptr;
+ s32 result;
+
+ if (vmci_host_dev->user_version < VMCI_VERSION_HOSTQP ||
+ vmci_host_dev->user_version >= VMCI_VERSION_NOVMVM) {
+ vmci_ioctl_err("not supported on this VMX (version=%d)\n",
+ vmci_host_dev->user_version);
+ return -EINVAL;
+ }
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
+ vmci_ioctl_err("only valid for contexts\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&page_file_info, uptr, sizeof(*info)))
+ return -EFAULT;
+
+ /*
+ * Communicate success pre-emptively to the caller. Note that the
+ * basic premise is that it is incumbent upon the caller not to look at
+ * the info.result field until after the ioctl() returns. And then,
+ * only if the ioctl() result indicates no error. We send up the
+ * SUCCESS status before calling SetPageStore() store because failing
+ * to copy up the result code means unwinding the SetPageStore().
+ *
+ * It turns out the logic to unwind a SetPageStore() opens a can of
+ * worms. For example, if a host had created the queue_pair and a
+ * guest attaches and SetPageStore() is successful but writing success
+ * fails, then ... the host has to be stopped from writing (anymore)
+ * data into the queue_pair. That means an additional test in the
+ * VMCI_Enqueue() code path. Ugh.
+ */
+
+ if (put_user(VMCI_SUCCESS, &info->result)) {
+ /*
+ * In this case, we can't write a result field of the
+ * caller's info block. So, we don't even try to
+ * SetPageStore().
+ */
+ return -EFAULT;
+ }
+
+ result = vmci_qp_broker_set_page_store(page_file_info.handle,
+ page_file_info.produce_va,
+ page_file_info.consume_va,
+ vmci_host_dev->context);
+ if (result < VMCI_SUCCESS) {
+ if (put_user(result, &info->result)) {
+ /*
+ * Note that in this case the SetPageStore()
+ * call failed but we were unable to
+ * communicate that to the caller (because the
+ * copy_to_user() call failed). So, if we
+ * simply return an error (in this case
+ * -EFAULT) then the caller will know that the
+ * SetPageStore failed even though we couldn't
+ * put the result code in the result field and
+ * indicate exactly why it failed.
+ *
+ * That says nothing about the issue where we
+ * were once able to write to the caller's info
+ * memory and now can't. Something more
+ * serious is probably going on than the fact
+ * that SetPageStore() didn't work.
+ */
+ return -EFAULT;
+ }
+ }
+
+ return 0;
+}
+
+static int vmci_host_do_qp_detach(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_qp_dtch_info detach_info;
+ struct vmci_qp_dtch_info __user *info = uptr;
+ s32 result;
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
+ vmci_ioctl_err("only valid for contexts\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&detach_info, uptr, sizeof(detach_info)))
+ return -EFAULT;
+
+ result = vmci_qp_broker_detach(detach_info.handle,
+ vmci_host_dev->context);
+ if (result == VMCI_SUCCESS &&
+ vmci_host_dev->user_version < VMCI_VERSION_NOVMVM) {
+ result = VMCI_SUCCESS_LAST_DETACH;
+ }
+
+ return put_user(result, &info->result) ? -EFAULT : 0;
+}
+
+static int vmci_host_do_ctx_add_notify(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_ctx_info ar_info;
+ struct vmci_ctx_info __user *info = uptr;
+ s32 result;
+ u32 cid;
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
+ vmci_ioctl_err("only valid for contexts\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&ar_info, uptr, sizeof(ar_info)))
+ return -EFAULT;
+
+ cid = vmci_ctx_get_id(vmci_host_dev->context);
+ result = vmci_ctx_add_notification(cid, ar_info.remote_cid);
+
+ return put_user(result, &info->result) ? -EFAULT : 0;
+}
+
+static int vmci_host_do_ctx_remove_notify(struct vmci_host_dev *vmci_host_dev,
+ const char *ioctl_name,
+ void __user *uptr)
+{
+ struct vmci_ctx_info ar_info;
+ struct vmci_ctx_info __user *info = uptr;
+ u32 cid;
+ int result;
+
+ if (vmci_host_dev->ct_type != VMCIOBJ_CONTEXT) {
+ vmci_ioctl_err("only valid for contexts\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&ar_info, uptr, sizeof(ar_info)))
+ return -EFAULT;
+
+ cid = vmci_ctx_get_id(vmci_host_dev->context);