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authorJan Glauber <jang@linux.vnet.ibm.com>2012-11-29 14:34:48 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-11-30 17:47:24 +0100
commitcbc0dd1f856b52b59c2c73a477b6cb210c8c66ad (patch)
tree064ceb4d1b2acb8716867b2a3fb65ae05bef1a31 /arch/s390
parent828b35f60eb0148f994bb13e328df94578b07142 (diff)
downloadvexpress-lsk-cbc0dd1f856b52b59c2c73a477b6cb210c8c66ad.tar.gz
s390/pci: CHSC PCI support for error and availability events
Add CHSC store-event-information support for PCI (notfication type 2) and report error and availability events to the PCI architecture layer. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/pci.h4
-rw-r--r--arch/s390/pci/Makefile3
-rw-r--r--arch/s390/pci/pci_event.c93
3 files changed, 99 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index e9dc0090ac4..d3597dcfec3 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -127,6 +127,10 @@ void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *);
int zpci_msihash_init(void);
void zpci_msihash_exit(void);
+/* Error handling and recovery */
+void zpci_event_error(void *);
+void zpci_event_availability(void *);
+
/* Helpers */
struct zpci_dev *get_zdev(struct pci_dev *);
struct zpci_dev *get_zdev_by_fid(u32);
diff --git a/arch/s390/pci/Makefile b/arch/s390/pci/Makefile
index 4590596d8b2..7e36f42ba08 100644
--- a/arch/s390/pci/Makefile
+++ b/arch/s390/pci/Makefile
@@ -2,4 +2,5 @@
# Makefile for the s390 PCI subsystem.
#
-obj-$(CONFIG_PCI) += pci.o pci_dma.o pci_clp.o pci_msi.o
+obj-$(CONFIG_PCI) += pci.o pci_dma.o pci_clp.o pci_msi.o \
+ pci_event.o
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
new file mode 100644
index 00000000000..dbed8cd3370
--- /dev/null
+++ b/arch/s390/pci/pci_event.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright IBM Corp. 2012
+ *
+ * Author(s):
+ * Jan Glauber <jang@linux.vnet.ibm.com>
+ */
+
+#define COMPONENT "zPCI"
+#define pr_fmt(fmt) COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+
+/* Content Code Description for PCI Function Error */
+struct zpci_ccdf_err {
+ u32 reserved1;
+ u32 fh; /* function handle */
+ u32 fid; /* function id */
+ u32 ett : 4; /* expected table type */
+ u32 mvn : 12; /* MSI vector number */
+ u32 dmaas : 8; /* DMA address space */
+ u32 : 6;
+ u32 q : 1; /* event qualifier */
+ u32 rw : 1; /* read/write */
+ u64 faddr; /* failing address */
+ u32 reserved3;
+ u16 reserved4;
+ u16 pec; /* PCI event code */
+} __packed;
+
+/* Content Code Description for PCI Function Availability */
+struct zpci_ccdf_avail {
+ u32 reserved1;
+ u32 fh; /* function handle */
+ u32 fid; /* function id */
+ u32 reserved2;
+ u32 reserved3;
+ u32 reserved4;
+ u32 reserved5;
+ u16 reserved6;
+ u16 pec; /* PCI event code */
+} __packed;
+
+static void zpci_event_log_err(struct zpci_ccdf_err *ccdf)
+{
+ struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
+
+ dev_err(&zdev->pdev->dev, "event code: 0x%x\n", ccdf->pec);
+}
+
+static void zpci_event_log_avail(struct zpci_ccdf_avail *ccdf)
+{
+ struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
+
+ pr_err("%s%s: availability event: fh: 0x%x fid: 0x%x event code: 0x%x reason:",
+ (zdev) ? dev_driver_string(&zdev->pdev->dev) : "?",
+ (zdev) ? dev_name(&zdev->pdev->dev) : "?",
+ ccdf->fh, ccdf->fid, ccdf->pec);
+ print_hex_dump(KERN_CONT, "ccdf", DUMP_PREFIX_OFFSET,
+ 16, 1, ccdf, sizeof(*ccdf), false);
+
+ switch (ccdf->pec) {
+ case 0x0301:
+ zpci_enable_device(zdev);
+ break;
+ case 0x0302:
+ clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
+ break;
+ case 0x0306:
+ clp_find_pci_devices();
+ break;
+ default:
+ break;
+ }
+}
+
+void zpci_event_error(void *data)
+{
+ struct zpci_ccdf_err *ccdf = data;
+ struct zpci_dev *zdev;
+
+ zpci_event_log_err(ccdf);
+ zdev = get_zdev_by_fid(ccdf->fid);
+ if (!zdev) {
+ pr_err("Error event for unknown fid: %x", ccdf->fid);
+ return;
+ }
+}
+
+void zpci_event_availability(void *data)
+{
+ zpci_event_log_avail(data);
+}