* [PATCH v3 2/3] aerdrv: Enhanced AER logging
@ 2012-11-30 20:39 Lance Ortiz
2012-11-30 20:59 ` Joe Perches
0 siblings, 1 reply; 5+ messages in thread
From: Lance Ortiz @ 2012-11-30 20:39 UTC (permalink / raw)
To: bhelgaas, lance_ortiz, jiang.liu, tony.luck, bp, rostedt,
mchehab, linux-acpi, linux-pci, linux-kernel
This patch will provide a more reliable and easy way for user-space
applications to have access to AER logs rather than reading them from the
message buffer. It also provides a way to notify user-space when an AER
event occurs.
The aer driver is updated to generate a trace event of function 'aer_event'
when an AER occurs. The trace event was added to both the interrupt
based aer path and the firmware first path
Signed-off-by: Lance Ortiz <lance.ortiz@hp.com>
---
drivers/acpi/apei/cper.c | 17 +++++++++++++++--
drivers/pci/pcie/aer/aerdrv_errprint.c | 10 +++++++++-
include/linux/aer.h | 2 +-
3 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
index e6defd8..87345d4 100644
--- a/drivers/acpi/apei/cper.c
+++ b/drivers/acpi/apei/cper.c
@@ -29,6 +29,7 @@
#include <linux/time.h>
#include <linux/cper.h>
#include <linux/acpi.h>
+#include <linux/pci.h>
#include <linux/aer.h>
/*
@@ -249,6 +250,10 @@ static const char *cper_pcie_port_type_strs[] = {
static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
const struct acpi_hest_generic_data *gdata)
{
+#ifdef CONFIG_ACPI_APEI_PCIEAER
+ struct pci_dev *dev;
+#endif
+
if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE)
printk("%s""port_type: %d, %s\n", pfx, pcie->port_type,
pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ?
@@ -281,9 +286,17 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
"%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
pfx, pcie->bridge.secondary_status, pcie->bridge.control);
#ifdef CONFIG_ACPI_APEI_PCIEAER
- if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) {
+ dev = pci_get_domain_bus_and_slot(pcie->device_id.segment,
+ pcie->device_id.bus, pcie->device_id.function);
+ if (!dev)
+ printk("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n",
+ pcie->device_id.segment, pcie->device_id.bus,
+ pcie->device_id.slot, pcie->device_id.function);
+
+ if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO && dev) {
struct aer_capability_regs *aer_regs = (void *)pcie->aer_info;
- cper_print_aer(pfx, gdata->error_severity, aer_regs);
+ cper_print_aer(dev, gdata->error_severity, aer_regs);
+ pci_dev_put(dev);
}
#endif
}
diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c
index 3ea5173..34d96e4 100644
--- a/drivers/pci/pcie/aer/aerdrv_errprint.c
+++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
@@ -23,6 +23,9 @@
#include "aerdrv.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/ras.h>
+
#define AER_AGENT_RECEIVER 0
#define AER_AGENT_REQUESTER 1
#define AER_AGENT_COMPLETER 2
@@ -194,6 +197,8 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
if (info->id && info->error_dev_num > 1 && info->id == id)
printk("%s"" Error of this Agent(%04x) is reported first\n",
prefix, id);
+ trace_aer_event(dev_name(&dev->dev), (info->status & ~info->mask),
+ info->severity);
}
void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
@@ -217,12 +222,13 @@ int cper_severity_to_aer(int cper_severity)
}
EXPORT_SYMBOL_GPL(cper_severity_to_aer);
-void cper_print_aer(const char *prefix, int cper_severity,
+void cper_print_aer(struct pci_dev *dev, int cper_severity,
struct aer_capability_regs *aer)
{
int aer_severity, layer, agent, status_strs_size, tlp_header_valid = 0;
u32 status, mask;
const char **status_strs;
+ char *prefix = NULL;
aer_severity = cper_severity_to_aer(cper_severity);
if (aer_severity == AER_CORRECTABLE) {
@@ -259,5 +265,7 @@ void cper_print_aer(const char *prefix, int cper_severity,
*(tlp + 8), *(tlp + 15), *(tlp + 14),
*(tlp + 13), *(tlp + 12));
}
+ trace_aer_event(dev_name(&dev->dev), (status & ~mask),
+ aer_severity);
}
#endif
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 544abdb..7b86dc6 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -49,7 +49,7 @@ static inline int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
}
#endif
-extern void cper_print_aer(const char *prefix, int cper_severity,
+extern void cper_print_aer(struct pci_dev *dev, int cper_severity,
struct aer_capability_regs *aer);
extern int cper_severity_to_aer(int cper_severity);
extern void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn,
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v3 2/3] aerdrv: Enhanced AER logging
2012-11-30 20:39 [PATCH v3 2/3] aerdrv: Enhanced AER logging Lance Ortiz
@ 2012-11-30 20:59 ` Joe Perches
0 siblings, 0 replies; 5+ messages in thread
From: Joe Perches @ 2012-11-30 20:59 UTC (permalink / raw)
To: Lance Ortiz
Cc: bhelgaas, lance_ortiz, jiang.liu, tony.luck, bp, rostedt,
mchehab, linux-acpi, linux-pci, linux-kernel
On Fri, 2012-11-30 at 13:39 -0700, Lance Ortiz wrote:
> This patch will provide a more reliable and easy way for user-space
> applications to have access to AER logs rather than reading them from the
> message buffer. It also provides a way to notify user-space when an AER
> event occurs.
Please run your patches through checkpatch.
[]
> diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
[]
> @@ -249,6 +250,10 @@ static const char *cper_pcie_port_type_strs[] = {
> static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
> const struct acpi_hest_generic_data *gdata)
> {
> +#ifdef CONFIG_ACPI_APEI_PCIEAER
> + struct pci_dev *dev;
> +#endif
> +
> if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE)
> printk("%s""port_type: %d, %s\n", pfx, pcie->port_type,
> pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ?
> @@ -281,9 +286,17 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
> "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
> pfx, pcie->bridge.secondary_status, pcie->bridge.control);
> #ifdef CONFIG_ACPI_APEI_PCIEAER
> - if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) {
> + dev = pci_get_domain_bus_and_slot(pcie->device_id.segment,
> + pcie->device_id.bus, pcie->device_id.function);
> + if (!dev)
> + printk("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n",
> + pcie->device_id.segment, pcie->device_id.bus,
> + pcie->device_id.slot, pcie->device_id.function);
Please prefix this with an appropriate KERN_<LEVEL>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3 2/3] aerdrv: Enhanced AER logging
2012-12-01 15:51 ` Borislav Petkov
@ 2012-12-01 16:01 ` Borislav Petkov
0 siblings, 0 replies; 5+ messages in thread
From: Borislav Petkov @ 2012-12-01 16:01 UTC (permalink / raw)
To: Lance Ortiz
Cc: bhelgaas, lance_ortiz, jiang.liu, tony.luck, rostedt, mchehab,
linux-acpi, linux-pci, linux-kernel
On Sat, Dec 01, 2012 at 04:51:30PM +0100, Borislav Petkov wrote:
> > @@ -281,9 +286,17 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
> > "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
> > pfx, pcie->bridge.secondary_status, pcie->bridge.control);
> > #ifdef CONFIG_ACPI_APEI_PCIEAER
> > - if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) {
> > + dev = pci_get_domain_bus_and_slot(pcie->device_id.segment,
> > + pcie->device_id.bus, pcie->device_id.function);
> > + if (!dev)
> > + pr_info("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n",
> > + pcie->device_id.segment, pcie->device_id.bus,
> > + pcie->device_id.slot, pcie->device_id.function);
> > +
> > + if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO && dev) {
>
> You don't need to test dev here because you've tested for !dev in the
> line above...
>
> > struct aer_capability_regs *aer_regs = (void *)pcie->aer_info;
> > - cper_print_aer(pfx, gdata->error_severity, aer_regs);
> > + cper_print_aer(dev, gdata->error_severity, aer_regs);
> > + pci_dev_put(dev);
>
> ... and thus this pci_dev_put() has to be unconditional, i.e. after the
> if test.
Not entirely correct: you don't need to test dev if you return early in
the !dev case. And AFAICT you should return early because if you can't
get dev, you can't call cper_print_aer() afterwards.
IOW, this hunk should look like this:
@@ -281,10 +286,19 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
"%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
pfx, pcie->bridge.secondary_status, pcie->bridge.control);
#ifdef CONFIG_ACPI_APEI_PCIEAER
- if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) {
- struct aer_capability_regs *aer_regs = (void *)pcie->aer_info;
- cper_print_aer(pfx, gdata->error_severity, aer_regs);
+ dev = pci_get_domain_bus_and_slot(pcie->device_id.segment,
+ pcie->device_id.bus, pcie->device_id.function);
+ if (!dev) {
+ pr_info("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n",
+ pcie->device_id.segment, pcie->device_id.bus,
+ pcie->device_id.slot, pcie->device_id.function);
+ return;
}
+
+ if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO)
+ cper_print_aer(dev, gdata->error_severity,
+ (struct aer_capability_regs *)pcie->aer_info);
+ pci_dev_put(dev);
#endif
}
Thanks.
--
Regards/Gruss,
Boris.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3 2/3] aerdrv: Enhanced AER logging
2012-11-30 21:33 ` [PATCH v3 2/3] aerdrv: Enhanced AER logging Lance Ortiz
@ 2012-12-01 15:51 ` Borislav Petkov
2012-12-01 16:01 ` Borislav Petkov
0 siblings, 1 reply; 5+ messages in thread
From: Borislav Petkov @ 2012-12-01 15:51 UTC (permalink / raw)
To: Lance Ortiz
Cc: bhelgaas, lance_ortiz, jiang.liu, tony.luck, rostedt, mchehab,
linux-acpi, linux-pci, linux-kernel
On Fri, Nov 30, 2012 at 02:33:37PM -0700, Lance Ortiz wrote:
> This patch will provide a more reliable and easy way for user-space
> applications to have access to AER logs rather than reading them from the
> message buffer. It also provides a way to notify user-space when an AER
> event occurs.
>
> The aer driver is updated to generate a trace event of function 'aer_event'
> when an AER occurs.
... when a PCIe error is reported over the AER interface.
> The trace event was added to both the interrupt
> based aer path and the firmware first path
>
> v1-v2 fix compile errors in ifdefs.
> v2-v3 Update to new location of trace header. Update print to remove
> warning.
>
> Signed-off-by: Lance Ortiz <lance.ortiz@hp.com>
> ---
>
> drivers/acpi/apei/cper.c | 17 +++++++++++++++--
> drivers/pci/pcie/aer/aerdrv_errprint.c | 10 +++++++++-
> include/linux/aer.h | 2 +-
> 3 files changed, 25 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
> index e6defd8..e9d6062 100644
> --- a/drivers/acpi/apei/cper.c
> +++ b/drivers/acpi/apei/cper.c
> @@ -29,6 +29,7 @@
> #include <linux/time.h>
> #include <linux/cper.h>
> #include <linux/acpi.h>
> +#include <linux/pci.h>
> #include <linux/aer.h>
>
> /*
> @@ -249,6 +250,10 @@ static const char *cper_pcie_port_type_strs[] = {
> static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
> const struct acpi_hest_generic_data *gdata)
> {
> +#ifdef CONFIG_ACPI_APEI_PCIEAER
> + struct pci_dev *dev;
> +#endif
> +
> if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE)
> printk("%s""port_type: %d, %s\n", pfx, pcie->port_type,
> pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ?
> @@ -281,9 +286,17 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
> "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
> pfx, pcie->bridge.secondary_status, pcie->bridge.control);
> #ifdef CONFIG_ACPI_APEI_PCIEAER
> - if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) {
> + dev = pci_get_domain_bus_and_slot(pcie->device_id.segment,
> + pcie->device_id.bus, pcie->device_id.function);
> + if (!dev)
> + pr_info("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n",
> + pcie->device_id.segment, pcie->device_id.bus,
> + pcie->device_id.slot, pcie->device_id.function);
> +
> + if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO && dev) {
You don't need to test dev here because you've tested for !dev in the
line above...
> struct aer_capability_regs *aer_regs = (void *)pcie->aer_info;
> - cper_print_aer(pfx, gdata->error_severity, aer_regs);
> + cper_print_aer(dev, gdata->error_severity, aer_regs);
> + pci_dev_put(dev);
... and thus this pci_dev_put() has to be unconditional, i.e. after the
if test.
which means that you can simplify the last 4 lines like this:
if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO)
cper_print_aer(dev, gdata->error_severity,
(struct aer_capability_regs *)pcie->aer_info);
pci_dev_put(dev);
...
Thanks.
--
Regards/Gruss,
Boris.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v3 2/3] aerdrv: Enhanced AER logging
2012-11-30 21:33 [PATCH v3 1/3] aerdrv: Trace Event for AER Lance Ortiz
@ 2012-11-30 21:33 ` Lance Ortiz
2012-12-01 15:51 ` Borislav Petkov
0 siblings, 1 reply; 5+ messages in thread
From: Lance Ortiz @ 2012-11-30 21:33 UTC (permalink / raw)
To: bhelgaas, lance_ortiz, jiang.liu, tony.luck, bp, rostedt,
mchehab, linux-acpi, linux-pci, linux-kernel
This patch will provide a more reliable and easy way for user-space
applications to have access to AER logs rather than reading them from the
message buffer. It also provides a way to notify user-space when an AER
event occurs.
The aer driver is updated to generate a trace event of function 'aer_event'
when an AER occurs. The trace event was added to both the interrupt
based aer path and the firmware first path
v1-v2 fix compile errors in ifdefs.
v2-v3 Update to new location of trace header. Update print to remove
warning.
Signed-off-by: Lance Ortiz <lance.ortiz@hp.com>
---
drivers/acpi/apei/cper.c | 17 +++++++++++++++--
drivers/pci/pcie/aer/aerdrv_errprint.c | 10 +++++++++-
include/linux/aer.h | 2 +-
3 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
index e6defd8..e9d6062 100644
--- a/drivers/acpi/apei/cper.c
+++ b/drivers/acpi/apei/cper.c
@@ -29,6 +29,7 @@
#include <linux/time.h>
#include <linux/cper.h>
#include <linux/acpi.h>
+#include <linux/pci.h>
#include <linux/aer.h>
/*
@@ -249,6 +250,10 @@ static const char *cper_pcie_port_type_strs[] = {
static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
const struct acpi_hest_generic_data *gdata)
{
+#ifdef CONFIG_ACPI_APEI_PCIEAER
+ struct pci_dev *dev;
+#endif
+
if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE)
printk("%s""port_type: %d, %s\n", pfx, pcie->port_type,
pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ?
@@ -281,9 +286,17 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
"%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
pfx, pcie->bridge.secondary_status, pcie->bridge.control);
#ifdef CONFIG_ACPI_APEI_PCIEAER
- if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) {
+ dev = pci_get_domain_bus_and_slot(pcie->device_id.segment,
+ pcie->device_id.bus, pcie->device_id.function);
+ if (!dev)
+ pr_info("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n",
+ pcie->device_id.segment, pcie->device_id.bus,
+ pcie->device_id.slot, pcie->device_id.function);
+
+ if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO && dev) {
struct aer_capability_regs *aer_regs = (void *)pcie->aer_info;
- cper_print_aer(pfx, gdata->error_severity, aer_regs);
+ cper_print_aer(dev, gdata->error_severity, aer_regs);
+ pci_dev_put(dev);
}
#endif
}
diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c
index 3ea5173..34d96e4 100644
--- a/drivers/pci/pcie/aer/aerdrv_errprint.c
+++ b/drivers/pci/pcie/aer/aerdrv_errprint.c
@@ -23,6 +23,9 @@
#include "aerdrv.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/ras.h>
+
#define AER_AGENT_RECEIVER 0
#define AER_AGENT_REQUESTER 1
#define AER_AGENT_COMPLETER 2
@@ -194,6 +197,8 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
if (info->id && info->error_dev_num > 1 && info->id == id)
printk("%s"" Error of this Agent(%04x) is reported first\n",
prefix, id);
+ trace_aer_event(dev_name(&dev->dev), (info->status & ~info->mask),
+ info->severity);
}
void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
@@ -217,12 +222,13 @@ int cper_severity_to_aer(int cper_severity)
}
EXPORT_SYMBOL_GPL(cper_severity_to_aer);
-void cper_print_aer(const char *prefix, int cper_severity,
+void cper_print_aer(struct pci_dev *dev, int cper_severity,
struct aer_capability_regs *aer)
{
int aer_severity, layer, agent, status_strs_size, tlp_header_valid = 0;
u32 status, mask;
const char **status_strs;
+ char *prefix = NULL;
aer_severity = cper_severity_to_aer(cper_severity);
if (aer_severity == AER_CORRECTABLE) {
@@ -259,5 +265,7 @@ void cper_print_aer(const char *prefix, int cper_severity,
*(tlp + 8), *(tlp + 15), *(tlp + 14),
*(tlp + 13), *(tlp + 12));
}
+ trace_aer_event(dev_name(&dev->dev), (status & ~mask),
+ aer_severity);
}
#endif
diff --git a/include/linux/aer.h b/include/linux/aer.h
index 544abdb..7b86dc6 100644
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -49,7 +49,7 @@ static inline int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
}
#endif
-extern void cper_print_aer(const char *prefix, int cper_severity,
+extern void cper_print_aer(struct pci_dev *dev, int cper_severity,
struct aer_capability_regs *aer);
extern int cper_severity_to_aer(int cper_severity);
extern void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn,
^ permalink raw reply related [flat|nested] 5+ messages in thread
end of thread, other threads:[~2012-12-01 16:01 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-11-30 20:39 [PATCH v3 2/3] aerdrv: Enhanced AER logging Lance Ortiz
2012-11-30 20:59 ` Joe Perches
2012-11-30 21:33 [PATCH v3 1/3] aerdrv: Trace Event for AER Lance Ortiz
2012-11-30 21:33 ` [PATCH v3 2/3] aerdrv: Enhanced AER logging Lance Ortiz
2012-12-01 15:51 ` Borislav Petkov
2012-12-01 16:01 ` Borislav Petkov
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