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authorGraeme Gregory <graeme.gregory@linaro.org>2016-06-07 15:03:32 +0100
committerGraeme Gregory <graeme.gregory@linaro.org>2016-06-07 15:03:32 +0100
commit224ba1d9a2f024731095b914868e1c4bf5a8933e (patch)
treed7e9dad6db3042902ac0d03cead7118cf25ad073
parent0ca5bc98334a884e958d7c375275983ead19b503 (diff)
parent9d05dcfdce8beff689fa12e8ccd71d27116bf1ec (diff)
downloadleg-kernel-224ba1d9a2f024731095b914868e1c4bf5a8933e.tar.gz
Merge branch 'topic-pci' into leg-kernel
-rw-r--r--arch/arm64/Kconfig2
-rw-r--r--arch/arm64/kernel/pci.c144
-rw-r--r--drivers/acpi/Kconfig3
-rw-r--r--drivers/acpi/Makefile1
-rw-r--r--drivers/acpi/pci_mcfg.c126
-rw-r--r--drivers/acpi/pci_root.c39
-rw-r--r--drivers/pci/ecam.c6
-rw-r--r--drivers/pci/host/pci-host-common.c3
-rw-r--r--drivers/pci/host/pci-host-generic.c3
-rw-r--r--drivers/pci/host/pci-thunder-ecam.c3
-rw-r--r--drivers/pci/host/pci-thunder-pem.c138
-rw-r--r--drivers/pci/pci.c29
-rw-r--r--include/asm-generic/vmlinux.lds.h7
-rw-r--r--include/linux/pci-acpi.h21
-rw-r--r--include/linux/pci-ecam.h (renamed from drivers/pci/ecam.h)4
-rw-r--r--include/linux/pci.h9
16 files changed, 500 insertions, 38 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e167260fcd0c..4413f0660719 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -5,6 +5,7 @@ config ARM64
select ACPI_REDUCED_HARDWARE_ONLY if ACPI
select ACPI_SPCR_TABLE if ACPI
select HAVE_ACPI_APEI if ACPI
+ select ACPI_MCFG if ACPI
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select ARCH_HAS_ELF_RANDOMIZE
@@ -98,6 +99,7 @@ config ARM64
select OF_EARLY_FLATTREE
select OF_NUMA if NUMA && OF
select OF_RESERVED_MEM
+ select PCI_ECAM if ACPI
select PERF_USE_VMALLOC
select POWER_RESET
select POWER_SUPPLY
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index 3c4e308b40a0..3a83c28a790b 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -17,6 +17,9 @@
#include <linux/mm.h>
#include <linux/of_pci.h>
#include <linux/of_platform.h>
+#include <linux/pci.h>
+#include <linux/pci-acpi.h>
+#include <linux/pci-ecam.h>
#include <linux/slab.h>
/*
@@ -50,11 +53,16 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
}
/*
- * Try to assign the IRQ number from DT when adding a new device
+ * Try to assign the IRQ number when probing a new device
*/
-int pcibios_add_device(struct pci_dev *dev)
+int pcibios_alloc_irq(struct pci_dev *dev)
{
- dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
+ if (acpi_disabled)
+ dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
+#ifdef CONFIG_ACPI
+ else
+ return acpi_pci_irq_enable(dev);
+#endif
return 0;
}
@@ -65,13 +73,21 @@ int pcibios_add_device(struct pci_dev *dev)
int raw_pci_read(unsigned int domain, unsigned int bus,
unsigned int devfn, int reg, int len, u32 *val)
{
- return -ENXIO;
+ struct pci_bus *b = pci_find_bus(domain, bus);
+
+ if (!b)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ return b->ops->read(b, devfn, reg, len, val);
}
int raw_pci_write(unsigned int domain, unsigned int bus,
unsigned int devfn, int reg, int len, u32 val)
{
- return -ENXIO;
+ struct pci_bus *b = pci_find_bus(domain, bus);
+
+ if (!b)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ return b->ops->write(b, devfn, reg, len, val);
}
#ifdef CONFIG_NUMA
@@ -85,10 +101,122 @@ EXPORT_SYMBOL(pcibus_to_node);
#endif
#ifdef CONFIG_ACPI
-/* Root bridge scanning */
+
+struct acpi_pci_generic_root_info {
+ struct acpi_pci_root_info common;
+ struct pci_config_window *cfg; /* config space mapping */
+};
+
+int acpi_pci_bus_domain_nr(struct pci_bus *bus)
+{
+ struct pci_config_window *cfg = bus->sysdata;
+ struct acpi_device *adev = to_acpi_device(cfg->parent);
+ struct acpi_pci_root *root = acpi_driver_data(adev);
+
+ return root->segment;
+}
+
+int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
+{
+ if (!acpi_disabled) {
+ struct pci_config_window *cfg = bridge->bus->sysdata;
+ struct acpi_device *adev = to_acpi_device(cfg->parent);
+ ACPI_COMPANION_SET(&bridge->dev, adev);
+ }
+
+ return 0;
+}
+
+/*
+ * Lookup the bus range for the domain in MCFG, and set up config space
+ * mapping.
+ */
+static int pci_acpi_setup_ecam_mapping(struct acpi_pci_root *root,
+ struct acpi_pci_generic_root_info *ri)
+{
+ struct resource *bus_res = &root->secondary;
+ u16 seg = root->segment;
+ struct pci_config_window *cfg;
+ struct resource cfgres;
+ unsigned int bsz;
+ int err;
+ struct pci_ecam_ops *ops;
+
+ err = pci_mcfg_lookup(root);
+ if (err) {
+ pr_err("%04x:%pR MCFG region not found\n", seg, bus_res);
+ return err;
+ }
+
+ ops = pci_mcfg_get_ops(root);
+ bsz = 1 << ops->bus_shift;
+ cfgres.start = root->mcfg_addr + bus_res->start * bsz;
+ cfgres.end = cfgres.start + resource_size(bus_res) * bsz - 1;
+ cfgres.flags = IORESOURCE_MEM;
+ cfg = pci_ecam_create(&root->device->dev, &cfgres, bus_res, ops);
+ if (IS_ERR(cfg)) {
+ pr_err("%04x:%pR error %ld mapping CAM\n", seg, bus_res,
+ PTR_ERR(cfg));
+ return PTR_ERR(cfg);
+ }
+
+ ri->cfg = cfg;
+ return 0;
+}
+
+/* release_info: free resrouces allocated by init_info */
+static void pci_acpi_generic_release_info(struct acpi_pci_root_info *ci)
+{
+ struct acpi_pci_generic_root_info *ri;
+
+ ri = container_of(ci, struct acpi_pci_generic_root_info, common);
+ pci_ecam_free(ri->cfg);
+ kfree(ri);
+}
+
+static struct acpi_pci_root_ops acpi_pci_root_ops = {
+ .release_info = pci_acpi_generic_release_info,
+};
+
+/* Interface called from ACPI code to setup PCI host controller */
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
- /* TODO: Should be revisited when implementing PCI on ACPI */
- return NULL;
+ int node = acpi_get_node(root->device->handle);
+ struct acpi_pci_generic_root_info *ri;
+ struct pci_bus *bus, *child;
+ int err;
+
+ ri = kzalloc_node(sizeof(*ri), GFP_KERNEL, node);
+ if (!ri)
+ return NULL;
+
+ err = pci_acpi_setup_ecam_mapping(root, ri);
+ if (err)
+ return NULL;
+
+ acpi_pci_root_ops.pci_ops = &ri->cfg->ops->pci_ops;
+ bus = acpi_pci_root_create(root, &acpi_pci_root_ops, &ri->common,
+ ri->cfg);
+ if (!bus)
+ return NULL;
+
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
+
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+
+ return bus;
+}
+
+void pcibios_add_bus(struct pci_bus *bus)
+{
+ acpi_pci_add_bus(bus);
}
+
+void pcibios_remove_bus(struct pci_bus *bus)
+{
+ acpi_pci_remove_bus(bus);
+}
+
#endif
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 47ef6f1a1e3c..4752c8c4f7de 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -223,6 +223,9 @@ config ACPI_PROCESSOR_IDLE
bool
select CPU_IDLE
+config ACPI_MCFG
+ bool
+
config ACPI_CPPC_LIB
bool
depends on ACPI_PROCESSOR
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 603563ac2eb2..ad65111687f9 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -40,6 +40,7 @@ acpi-$(CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC) += processor_pdc.o
acpi-y += ec.o
acpi-$(CONFIG_ACPI_DOCK) += dock.o
acpi-y += pci_root.o pci_link.o pci_irq.o
+obj-$(CONFIG_ACPI_MCFG) += pci_mcfg.o
acpi-y += acpi_lpss.o acpi_apd.o
acpi-y += acpi_platform.o
acpi-y += acpi_pnp.o
diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
new file mode 100644
index 000000000000..f3d4570a4f9c
--- /dev/null
+++ b/drivers/acpi/pci_mcfg.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2016 Broadcom
+ * Author: Jayachandran C <jchandra@broadcom.com>
+ * Copyright (C) 2016 Semihalf
+ * Author: Tomasz Nowicki <tn@semihalf.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation (the "GPL").
+ *
+ * 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 version 2 (GPLv2) for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 (GPLv2) along with this source code.
+ */
+
+#define pr_fmt(fmt) "ACPI: " fmt
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/pci-acpi.h>
+#include <linux/pci-ecam.h>
+
+/* Root pointer to the mapped MCFG table */
+static struct acpi_table_mcfg *mcfg_table;
+static int mcfg_entries;
+
+extern struct pci_cfg_fixup __start_acpi_mcfg_fixups[];
+extern struct pci_cfg_fixup __end_acpi_mcfg_fixups[];
+
+struct pci_ecam_ops *pci_mcfg_get_ops(struct acpi_pci_root *root)
+{
+ int bus_num = root->secondary.start;
+ int domain = root->segment;
+ struct pci_cfg_fixup *f;
+
+ if (!mcfg_table)
+ return &pci_generic_ecam_ops;
+
+ /*
+ * Match against platform specific quirks and return corresponding
+ * CAM ops.
+ *
+ * First match against PCI topology <domain:bus> then use OEM ID and
+ * OEM revision from MCFG table standard header.
+ */
+ for (f = __start_acpi_mcfg_fixups; f < __end_acpi_mcfg_fixups; f++) {
+ if ((f->domain == domain || f->domain == PCI_MCFG_DOMAIN_ANY) &&
+ (f->bus_num == bus_num || f->bus_num == PCI_MCFG_BUS_ANY) &&
+ (!strncmp(f->oem_id, mcfg_table->header.oem_id,
+ ACPI_OEM_ID_SIZE)) &&
+ (f->oem_revision == mcfg_table->header.oem_revision))
+ return f->ops;
+ }
+ /* No quirks, use ECAM */
+ return &pci_generic_ecam_ops;
+}
+
+int pci_mcfg_lookup(struct acpi_pci_root *root)
+{
+ struct acpi_mcfg_allocation *mptr, *entry = NULL;
+ struct resource *bus_res = &root->secondary;
+ int i;
+
+ if (mcfg_table) {
+ mptr = (struct acpi_mcfg_allocation *) &mcfg_table[1];
+ for (i = 0; i < mcfg_entries && !entry; i++, mptr++)
+ if (mptr->pci_segment == root->segment &&
+ mptr->start_bus_number == bus_res->start)
+ entry = mptr;
+ }
+
+ /* not found, use _CBA if available, else error */
+ if (!entry) {
+ if (root->mcfg_addr)
+ return root->mcfg_addr;
+ pr_err("%04x:%pR MCFG lookup failed\n", root->segment, bus_res);
+ return -ENOENT;
+ } else if (root->mcfg_addr && entry->address != root->mcfg_addr) {
+ pr_warn("%04x:%pR CBA %pa != MCFG %lx, using CBA\n",
+ root->segment, bus_res, &root->mcfg_addr,
+ (unsigned long)entry->address);
+ return 0;
+ }
+
+ /* found matching entry, bus range check */
+ if (entry->end_bus_number != bus_res->end) {
+ resource_size_t bus_end = min_t(resource_size_t,
+ entry->end_bus_number, bus_res->end);
+ pr_warn("%04x:%pR bus end mismatch, using %02lx\n",
+ root->segment, bus_res, (unsigned long)bus_end);
+ bus_res->end = bus_end;
+ }
+
+ if (!root->mcfg_addr)
+ root->mcfg_addr = entry->address;
+ return 0;
+}
+
+static __init int pci_mcfg_parse(struct acpi_table_header *header)
+{
+ if (header->length < sizeof(struct acpi_table_mcfg))
+ return -EINVAL;
+
+ mcfg_entries = (header->length - sizeof(struct acpi_table_mcfg)) /
+ sizeof(struct acpi_mcfg_allocation);
+ if (mcfg_entries == 0) {
+ pr_err("MCFG has no entries\n");
+ return -EINVAL;
+ }
+
+ mcfg_table = (struct acpi_table_mcfg *)header;
+ pr_info("MCFG table detected, %d entries\n", mcfg_entries);
+ return 0;
+}
+
+/* Interface called by ACPI - parse and save MCFG table */
+void __init pci_mmcfg_late_init(void)
+{
+ int err = acpi_table_parse(ACPI_SIG_MCFG, pci_mcfg_parse);
+ if (err)
+ pr_err("Failed to parse MCFG (%d)\n", err);
+}
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index a35dd237ded9..31323b19d305 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -719,6 +719,40 @@ next:
}
}
+#ifdef PCI_IOBASE
+static void acpi_pci_root_remap_iospace(struct resource_entry *entry)
+{
+ struct resource *res = entry->res;
+ resource_size_t cpu_addr = res->start;
+ resource_size_t pci_addr = cpu_addr - entry->offset;
+ resource_size_t length = resource_size(res);
+ unsigned long port;
+
+ if (pci_register_io_range(cpu_addr, length))
+ goto err;
+
+ port = pci_address_to_pio(cpu_addr);
+ if (port == (unsigned long)-1)
+ goto err;
+
+ res->start = port;
+ res->end = port + length - 1;
+ entry->offset = port - pci_addr;
+
+ if (pci_remap_iospace(res, cpu_addr) < 0)
+ goto err;
+
+ pr_info("Remapped I/O %pa to %pR\n", &cpu_addr, res);
+ return;
+err:
+ res->flags |= IORESOURCE_DISABLED;
+}
+#else
+static void acpi_pci_root_remap_iospace(struct resource_entry *entry)
+{
+}
+#endif
+
int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info)
{
int ret;
@@ -739,6 +773,9 @@ int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info)
"no IO and memory resources present in _CRS\n");
else {
resource_list_for_each_entry_safe(entry, tmp, list) {
+ if (entry->res->flags & IORESOURCE_IO)
+ acpi_pci_root_remap_iospace(entry);
+
if (entry->res->flags & IORESOURCE_DISABLED)
resource_list_destroy_entry(entry);
else
@@ -810,6 +847,8 @@ static void acpi_pci_root_release_info(struct pci_host_bridge *bridge)
resource_list_for_each_entry(entry, &bridge->windows) {
res = entry->res;
+ if (res->flags & IORESOURCE_IO)
+ pci_unmap_iospace(res);
if (res->parent &&
(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
release_resource(res);
diff --git a/drivers/pci/ecam.c b/drivers/pci/ecam.c
index f9832ad8efe2..66e0d718472f 100644
--- a/drivers/pci/ecam.c
+++ b/drivers/pci/ecam.c
@@ -19,10 +19,9 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
+#include <linux/pci-ecam.h>
#include <linux/slab.h>
-#include "ecam.h"
-
/*
* On 64-bit systems, we do a single ioremap for the whole config space
* since we have enough virtual address range available. On 32-bit, we
@@ -52,6 +51,7 @@ struct pci_config_window *pci_ecam_create(struct device *dev,
if (!cfg)
return ERR_PTR(-ENOMEM);
+ cfg->parent = dev;
cfg->ops = ops;
cfg->busr.start = busr->start;
cfg->busr.end = busr->end;
@@ -95,7 +95,7 @@ struct pci_config_window *pci_ecam_create(struct device *dev,
}
if (ops->init) {
- err = ops->init(dev, cfg);
+ err = ops->init(cfg);
if (err)
goto err_exit;
}
diff --git a/drivers/pci/host/pci-host-common.c b/drivers/pci/host/pci-host-common.c
index 8cba7ab73df9..c18b9e3bb8bd 100644
--- a/drivers/pci/host/pci-host-common.c
+++ b/drivers/pci/host/pci-host-common.c
@@ -20,10 +20,9 @@
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
+#include <linux/pci-ecam.h>
#include <linux/platform_device.h>
-#include "../ecam.h"
-
static int gen_pci_parse_request_of_pci_ranges(struct device *dev,
struct list_head *resources, struct resource **bus_range)
{
diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c
index 6eaceab1bf04..f0ca6de0d87e 100644
--- a/drivers/pci/host/pci-host-generic.c
+++ b/drivers/pci/host/pci-host-generic.c
@@ -23,10 +23,9 @@
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
+#include <linux/pci-ecam.h>
#include <linux/platform_device.h>
-#include "../ecam.h"
-
static struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = {
.bus_shift = 16,
.pci_ops = {
diff --git a/drivers/pci/host/pci-thunder-ecam.c b/drivers/pci/host/pci-thunder-ecam.c
index 540d030613eb..a9fc1c9105fd 100644
--- a/drivers/pci/host/pci-thunder-ecam.c
+++ b/drivers/pci/host/pci-thunder-ecam.c
@@ -11,10 +11,9 @@
#include <linux/ioport.h>
#include <linux/of_pci.h>
#include <linux/of.h>
+#include <linux/pci-ecam.h>
#include <linux/platform_device.h>
-#include "../ecam.h"
-
static void set_val(u32 v, int where, int size, u32 *val)
{
int shift = (where & 3) * 8;
diff --git a/drivers/pci/host/pci-thunder-pem.c b/drivers/pci/host/pci-thunder-pem.c
index 9b8ab94f3c8c..8f002ef5ea2a 100644
--- a/drivers/pci/host/pci-thunder-pem.c
+++ b/drivers/pci/host/pci-thunder-pem.c
@@ -18,10 +18,10 @@
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
+#include <linux/pci-acpi.h>
+#include <linux/pci-ecam.h>
#include <linux/platform_device.h>
-#include "../ecam.h"
-
#define PEM_CFG_WR 0x28
#define PEM_CFG_RD 0x30
@@ -285,31 +285,109 @@ static int thunder_pem_config_write(struct pci_bus *bus, unsigned int devfn,
return pci_generic_config_write(bus, devfn, where, size, val);
}
-static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg)
+#ifdef CONFIG_ACPI
+
+struct pem_acpi_res {
+ struct resource resource;
+ int found;
+};
+
+static acpi_status
+thunder_pem_cfg(struct acpi_resource *resource, void *ctx)
+{
+ struct pem_acpi_res *pem_ctx = ctx;
+ struct resource *res = &pem_ctx->resource;
+
+ if ((resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) ||
+ (resource->data.address32.resource_type != ACPI_MEMORY_RANGE))
+ return AE_OK;
+
+ res->start = resource->data.address64.address.minimum;
+ res->end = resource->data.address64.address.maximum;
+ res->flags = IORESOURCE_MEM;
+
+ pem_ctx->found++;
+ return AE_OK;
+}
+
+static acpi_status
+thunder_pem_find_dev(acpi_handle handle, u32 level, void *ctx, void **ret)
+{
+ struct pem_acpi_res *pem_ctx = ctx;
+ struct acpi_device_info *info;
+ acpi_status status = AE_OK;
+
+ status = acpi_get_object_info(handle, &info);
+ if (ACPI_FAILURE(status))
+ return AE_OK;
+
+ if (strncmp(info->hardware_id.string, "THRX0001", 8) != 0)
+ goto out;
+
+ pem_ctx->found = 0;
+ status = acpi_walk_resources(handle, METHOD_NAME__CRS, thunder_pem_cfg,
+ pem_ctx);
+ if (ACPI_FAILURE(status))
+ goto out;
+
+ if (pem_ctx->found)
+ status = AE_CTRL_TERMINATE;
+out:
+ kfree(info);
+ return status;
+}
+
+static struct resource *thunder_pem_get_acpi_res(struct device *dev)
+{
+ struct acpi_device *adev = to_acpi_device(dev);
+ acpi_handle handle = acpi_device_handle(adev);
+ struct pem_acpi_res *pem_ctx;
+ acpi_status status;
+
+ pem_ctx = devm_kzalloc(dev, sizeof(*pem_ctx), GFP_KERNEL);
+ if (!pem_ctx)
+ return NULL;
+
+ status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
+ thunder_pem_find_dev, NULL, pem_ctx, NULL);
+ if (ACPI_FAILURE(status) || !pem_ctx->found)
+ return NULL;
+
+ return &pem_ctx->resource;
+}
+#else
+static struct resource *thunder_pem_get_acpi_res(struct device *dev)
+{
+ return NULL;
+}
+#endif
+
+static int thunder_pem_init(struct pci_config_window *cfg)
{
+ struct device *dev = cfg->parent;
resource_size_t bar4_start;
struct resource *res_pem;
struct thunder_pem_pci *pem_pci;
struct platform_device *pdev;
- /* Only OF support for now */
- if (!dev->of_node)
- return -EINVAL;
-
pem_pci = devm_kzalloc(dev, sizeof(*pem_pci), GFP_KERNEL);
if (!pem_pci)
return -ENOMEM;
- pdev = to_platform_device(dev);
-
- /*
- * The second register range is the PEM bridge to the PCIe
- * bus. It has a different config access method than those
- * devices behind the bridge.
- */
- res_pem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (acpi_disabled) {
+ pdev = to_platform_device(dev);
+
+ /*
+ * The second register range is the PEM bridge to the PCIe
+ * bus. It has a different config access method than those
+ * devices behind the bridge.
+ */
+ res_pem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ } else {
+ res_pem = thunder_pem_get_acpi_res(dev);
+ }
if (!res_pem) {
- dev_err(dev, "missing \"reg[1]\"property\n");
+ dev_err(dev, "missing configuration region\n");
return -EINVAL;
}
@@ -362,5 +440,33 @@ static struct platform_driver thunder_pem_driver = {
};
module_platform_driver(thunder_pem_driver);
+#ifdef CONFIG_ACPI
+
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 4, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 5, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 6, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 7, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 8, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 9, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 14, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 15, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 16, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 17, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 18, PCI_MCFG_BUS_ANY);
+DECLARE_ACPI_MCFG_FIXUP(&pci_thunder_pem_ops, "CAVIUM", 1,
+ 19, PCI_MCFG_BUS_ANY);
+#endif
+
MODULE_DESCRIPTION("Thunder PEM PCIe host driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index c8b4dbdd1bdd..2b52178a11c9 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -7,6 +7,7 @@
* Copyright 1997 -- 2000 Martin Mares <mj@ucw.cz>
*/
+#include <linux/acpi.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
@@ -25,6 +26,7 @@
#include <linux/device.h>
#include <linux/pm_runtime.h>
#include <linux/pci_hotplug.h>
+#include <linux/vmalloc.h>
#include <asm/setup.h>
#include <linux/aer.h>
#include "pci.h"
@@ -3165,6 +3167,23 @@ int __weak pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr)
#endif
}
+/**
+ * pci_unmap_iospace - Unmap the memory mapped I/O space
+ * @res: resource to be unmapped
+ *
+ * Unmap the CPU virtual address @res from virtual address space.
+ * Only architectures that have memory mapped IO functions defined
+ * (and the PCI_IOBASE value defined) should call this function.
+ */
+void pci_unmap_iospace(struct resource *res)
+{
+#if defined(PCI_IOBASE) && defined(CONFIG_MMU)
+ unsigned long vaddr = (unsigned long)PCI_IOBASE + res->start;
+
+ unmap_kernel_range(vaddr, resource_size(res));
+#endif
+}
+
static void __pci_set_master(struct pci_dev *dev, bool enable)
{
u16 old_cmd, cmd;
@@ -4923,7 +4942,7 @@ int pci_get_new_domain_nr(void)
}
#ifdef CONFIG_PCI_DOMAINS_GENERIC
-void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+static int of_pci_bus_domain_nr(struct device *parent)
{
static int use_dt_domains = -1;
int domain = -1;
@@ -4967,7 +4986,13 @@ void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
domain = -1;
}
- bus->domain_nr = domain;
+ return domain;
+}
+
+void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+{
+ bus->domain_nr = acpi_disabled ? of_pci_bus_domain_nr(parent) :
+ acpi_pci_bus_domain_nr(bus);
}
#endif
#endif
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 6a67ab94b553..43604fc68507 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -300,6 +300,13 @@
VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \
} \
\
+ /* ACPI MCFG quirks */ \
+ .acpi_fixup : AT(ADDR(.acpi_fixup) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start_acpi_mcfg_fixups) = .; \
+ *(.acpi_fixup_mcfg) \
+ VMLINUX_SYMBOL(__end_acpi_mcfg_fixups) = .; \
+ } \
+ \
/* Built-in firmware blobs */ \
.builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start_builtin_fw) = .; \
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 89ab0572dbc6..b4e810641301 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -24,6 +24,9 @@ static inline acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev)
}
extern phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle);
+extern int pci_mcfg_lookup(struct acpi_pci_root *root);
+extern struct pci_ecam_ops *pci_mcfg_get_ops(struct acpi_pci_root *root);
+
static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
{
struct pci_bus *pbus = pdev->bus;
@@ -70,6 +73,24 @@ struct acpi_pci_root_ops {
int (*prepare_resources)(struct acpi_pci_root_info *info);
};
+struct pci_cfg_fixup {
+ struct pci_ecam_ops *ops;
+ char *oem_id;
+ u32 oem_revision;
+ int domain;
+ int bus_num;
+};
+
+#define PCI_MCFG_DOMAIN_ANY -1
+#define PCI_MCFG_BUS_ANY -1
+
+/* Designate a routine to fix up buggy MCFG */
+#define DECLARE_ACPI_MCFG_FIXUP(ops, oem_id, rev, dom, bus) \
+ static const struct pci_cfg_fixup __mcfg_fixup_##system##dom##bus\
+ __used __attribute__((__section__(".acpi_fixup_mcfg"), \
+ aligned((sizeof(void *))))) = \
+ { ops, oem_id, rev, dom, bus };
+
extern int acpi_pci_probe_root_resources(struct acpi_pci_root_info *info);
extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
struct acpi_pci_root_ops *ops,
diff --git a/drivers/pci/ecam.h b/include/linux/pci-ecam.h
index 9878bebd45bb..7adad206b1f4 100644
--- a/drivers/pci/ecam.h
+++ b/include/linux/pci-ecam.h
@@ -27,8 +27,7 @@ struct pci_config_window;
struct pci_ecam_ops {
unsigned int bus_shift;
struct pci_ops pci_ops;
- int (*init)(struct device *,
- struct pci_config_window *);
+ int (*init)(struct pci_config_window *);
};
/*
@@ -45,6 +44,7 @@ struct pci_config_window {
void __iomem *win; /* 64-bit single mapping */
void __iomem **winp; /* 32-bit per-bus mapping */
};
+ struct device *parent;/* ECAM res was from this dev */
};
/* create and free pci_config_window */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b67e4df20801..f66d1881c2d9 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1167,6 +1167,7 @@ int pci_register_io_range(phys_addr_t addr, resource_size_t size);
unsigned long pci_address_to_pio(phys_addr_t addr);
phys_addr_t pci_pio_to_address(unsigned long pio);
int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
+void pci_unmap_iospace(struct resource *res);
static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
{
@@ -1389,6 +1390,12 @@ static inline int pci_domain_nr(struct pci_bus *bus)
{
return bus->domain_nr;
}
+/* Arch specific ACPI hook to set-up domain number */
+#ifdef CONFIG_ACPI
+int acpi_pci_bus_domain_nr(struct pci_bus *bus);
+#else
+static inline int acpi_pci_bus_domain_nr(struct pci_bus *bus) { return -1; }
+#endif
void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent);
#else
static inline void pci_bus_assign_domain_nr(struct pci_bus *bus,
@@ -1722,7 +1729,7 @@ void pcibios_free_irq(struct pci_dev *dev);
extern struct dev_pm_ops pcibios_pm_ops;
#endif
-#ifdef CONFIG_PCI_MMCONFIG
+#if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
void __init pci_mmcfg_early_init(void);
void __init pci_mmcfg_late_init(void);
#else