[RFC PATCH 06/10] 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
---
arch/s390/include/asm/pci.h | 4 ++
arch/s390/pci/Makefile | 3 +-
arch/s390/pci/pci_event.c | 93 ++
drivers/s390/cio/chsc.c | 156 +++-
4 files changed, 211 insertions(+), 45 deletions(-)
create mode 100644 arch/s390/pci/pci_event.c
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index ca48caf..3dc2cb6 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 4590596..7e36f42 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 000..dbed8cd
--- /dev/null
+++ b/arch/s390/pci/pci_event.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright IBM Corp. 2012
+ *
+ * Author(s):
+ *Jan Glauber
+ */
+
+#define COMPONENT "zPCI"
+#define pr_fmt(fmt) COMPONENT ": " fmt
+
+#include
+#include
+
+/* 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(>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(>pdev->dev) : "?",
+ (zdev) ? dev_name(>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);
+}
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 4d51a7c..68e80e2 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -1,7 +1,7 @@
/*
* S/390 common I/O routines -- channel subsystem call
*
- *Copyright IBM Corp. 1999, 2010
+ *Copyright IBM Corp. 1999,2012
*Author(s): Ingo Adlung (adl...@de.ibm.com)
* Cornelia Huck (cornelia.h...@de.ibm.com)
* Arnd Bergmann (ar...@de.ibm.com)
@@ -14,6 +14,7 @@
#include
#include
#include
+#include
#include
#include
@@ -260,26 +261,45 @@ __get_chpid_from_lir(void *data)
[RFC PATCH 06/10] 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 j...@linux.vnet.ibm.com
---
arch/s390/include/asm/pci.h | 4 ++
arch/s390/pci/Makefile | 3 +-
arch/s390/pci/pci_event.c | 93 ++
drivers/s390/cio/chsc.c | 156 +++-
4 files changed, 211 insertions(+), 45 deletions(-)
create mode 100644 arch/s390/pci/pci_event.c
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index ca48caf..3dc2cb6 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 4590596..7e36f42 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 000..dbed8cd
--- /dev/null
+++ b/arch/s390/pci/pci_event.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright IBM Corp. 2012
+ *
+ * Author(s):
+ *Jan Glauber j...@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);
+}
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 4d51a7c..68e80e2 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -1,7 +1,7 @@
/*
* S/390 common I/O routines -- channel subsystem call
*
- *Copyright IBM Corp. 1999, 2010
+ *Copyright IBM Corp. 1999,2012
*Author(s): Ingo Adlung (adl...@de.ibm.com)
* Cornelia Huck (cornelia.h...@de.ibm.com)
* Arnd Bergmann (ar...@de.ibm.com)
@@ -14,6 +14,7 @@
#include linux/slab.h
#include linux/init.h
#include linux/device.h
