This is a follow up to:
https://lkml.org/lkml/2018/5/22/1057
Respinning as a new patchset because the old one has been refactored
to include new patches (that were not part of original), and dropping
some patches. The major changes are:
* Provide breakdown of Fatal / non fatal errors separately
* Include the "total" in the same file
* do some PCI cleanup before the actual aer_stats stuff
* Include documentation in the main patch
* Rename variables / attributes to better match the newer reality.
Rajat Jain (4):
PCI: Move pci_aer_init() and pci_no_aer() declarations to
drivers/pci/pci.h
PCI/AER: Define and allocate aer_stats structure for AER capable
devices
PCI/AER: Add sysfs attributes to provide AER stats and breakdown
PCI/AER: Add sysfs attributes for rootport cumulative stats
.../testing/sysfs-bus-pci-devices-aer_stats | 122 +++++++++++
Documentation/PCI/pcieaer-howto.txt | 5 +
drivers/pci/pci-sysfs.c | 3 +
drivers/pci/pci.h | 11 +
drivers/pci/pcie/aer.c | 198 +++++++++++++++++-
drivers/pci/probe.c | 1 +
include/linux/pci.h | 5 +-
7 files changed, 337 insertions(+), 8 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
--
2.18.0.rc2.346.g013aa6912e-goog
Since these functions are unsed only internally, move them to the PCI
internal header file. Also, no one cares about return value of
pci_aer_init(), so make it void.
Signed-off-by: Rajat Jain <[email protected]>
---
drivers/pci/pci.h | 8 ++++++++
drivers/pci/pcie/aer.c | 4 ++--
include/linux/pci.h | 4 ----
3 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index c358e7a07f3f..9a1af85aca77 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -452,4 +452,12 @@ static inline int devm_of_pci_get_host_bridge_resources(struct device *dev,
}
#endif
+#ifdef CONFIG_PCIEAER
+void pci_no_aer(void);
+void pci_aer_init(struct pci_dev *dev);
+#else
+static inline void pci_no_aer(void) { }
+static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; }
+#endif
+
#endif /* DRIVERS_PCI_H */
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index a2e88386af28..11482669b93b 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -402,10 +402,10 @@ int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
return 0;
}
-int pci_aer_init(struct pci_dev *dev)
+void pci_aer_init(struct pci_dev *dev)
{
dev->aer_cap = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
- return pci_cleanup_aer_error_status_regs(dev);
+ pci_cleanup_aer_error_status_regs(dev);
}
#define AER_AGENT_RECEIVER 0
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 340029b2fb38..b4ffea05c999 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1468,13 +1468,9 @@ static inline bool pcie_aspm_support_enabled(void) { return false; }
#endif
#ifdef CONFIG_PCIEAER
-void pci_no_aer(void);
bool pci_aer_available(void);
-int pci_aer_init(struct pci_dev *dev);
#else
-static inline void pci_no_aer(void) { }
static inline bool pci_aer_available(void) { return false; }
-static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; }
#endif
#ifdef CONFIG_PCIE_ECRC
--
2.18.0.rc2.346.g013aa6912e-goog
Add sysfs attributes to provide total and breakdown of the AERs seen,
into different type of correctable, fatal and nonfatal errors:
/sys/bus/pci/devices/<dev>/aer_dev_correctable
/sys/bus/pci/devices/<dev>/aer_dev_fatal
/sys/bus/pci/devices/<dev>/aer_dev_nonfatal
Signed-off-by: Rajat Jain <[email protected]>
---
.../testing/sysfs-bus-pci-devices-aer_stats | 94 +++++++++++++++++++
Documentation/PCI/pcieaer-howto.txt | 5 +
drivers/pci/pci-sysfs.c | 3 +
drivers/pci/pci.h | 1 +
drivers/pci/pcie/aer.c | 94 +++++++++++++++++++
5 files changed, 197 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats b/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
new file mode 100644
index 000000000000..7dd54bdf910b
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
@@ -0,0 +1,94 @@
+==========================
+PCIe Device AER statistics
+==========================
+These attributes show up under all the devices that are AER capable. These
+statistical counters indicate the errors "as seen/reported by the device".
+Note that this may mean that if an end point is causing problems, the AER
+counters may increment at its link partner (e.g. root port) because the
+errors may be "seen" / reported by the link partner and not the the
+problematic end point itself (which may report all counters as 0 as it never
+saw any problems).
+
+Where: /sys/bus/pci/devices/<dev>/aer_dev_correctable
+Date: July 2018
+Kernel Version: 4.19.0
+Contact: [email protected], [email protected]
+Description: List of correctable errors seen and reported by this
+ PCI device using ERR_COR. Note that since multiple errors may
+ be reported using a single ERR_COR message, thus
+ TOTAL_ERR_COR at the end of the file may not match the actual
+ total of all the errors in the file. Sample output:
+-------------------------------------------------------------------------
+localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_correctable
+Receiver Error 2
+Bad TLP 0
+Bad DLLP 0
+RELAY_NUM Rollover 0
+Replay Timer Timeout 0
+Advisory Non-Fatal 0
+Corrected Internal Error 0
+Header Log Overflow 0
+TOTAL_ERR_COR 2
+-------------------------------------------------------------------------
+
+Where: /sys/bus/pci/devices/<dev>/aer_dev_fatal
+Date: July 2018
+Kernel Version: 4.19.0
+Contact: [email protected], [email protected]
+Description: List of uncorrectable fatal errors seen and reported by this
+ PCI device using ERR_FATAL. Note that since multiple errors may
+ be reported using a single ERR_FATAL message, thus
+ TOTAL_ERR_FATAL at the end of the file may not match the actual
+ total of all the errors in the file. Sample output:
+-------------------------------------------------------------------------
+localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_fatal
+Undefined 0
+Data Link Protocol 0
+Surprise Down Error 0
+Poisoned TLP 0
+Flow Control Protocol 0
+Completion Timeout 0
+Completer Abort 0
+Unexpected Completion 0
+Receiver Overflow 0
+Malformed TLP 0
+ECRC 0
+Unsupported Request 0
+ACS Violation 0
+Uncorrectable Internal Error 0
+MC Blocked TLP 0
+AtomicOp Egress Blocked 0
+TLP Prefix Blocked Error 0
+TOTAL_ERR_FATAL 0
+-------------------------------------------------------------------------
+
+Where: /sys/bus/pci/devices/<dev>/aer_dev_nonfatal
+Date: July 2018
+Kernel Version: 4.19.0
+Contact: [email protected], [email protected]
+Description: List of uncorrectable nonfatal errors seen and reported by this
+ PCI device using ERR_NONFATAL. Note that since multiple errors
+ may be reported using a single ERR_FATAL message, thus
+ TOTAL_ERR_NONFATAL at the end of the file may not match the
+ actual total of all the errors in the file. Sample output:
+-------------------------------------------------------------------------
+localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_nonfatal
+Undefined 0
+Data Link Protocol 0
+Surprise Down Error 0
+Poisoned TLP 0
+Flow Control Protocol 0
+Completion Timeout 0
+Completer Abort 0
+Unexpected Completion 0
+Receiver Overflow 0
+Malformed TLP 0
+ECRC 0
+Unsupported Request 0
+ACS Violation 0
+Uncorrectable Internal Error 0
+MC Blocked TLP 0
+AtomicOp Egress Blocked 0
+TLP Prefix Blocked Error 0
+TOTAL_ERR_NONFATAL 0
+-------------------------------------------------------------------------
diff --git a/Documentation/PCI/pcieaer-howto.txt b/Documentation/PCI/pcieaer-howto.txt
index acd0dddd6bb8..91b6e677cb8c 100644
--- a/Documentation/PCI/pcieaer-howto.txt
+++ b/Documentation/PCI/pcieaer-howto.txt
@@ -73,6 +73,11 @@ In the example, 'Requester ID' means the ID of the device who sends
the error message to root port. Pls. refer to pci express specs for
other fields.
+2.4 AER Statistics / Counters
+
+When PCIe AER errors are captured, the counters / statistics are also exposed
+in form of sysfs attributes which are documented at
+Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
3. Developer Guide
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 0c4653c1d2ce..9f1cb9051d7d 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1746,6 +1746,9 @@ static const struct attribute_group *pci_dev_attr_groups[] = {
#endif
&pci_bridge_attr_group,
&pcie_dev_attr_group,
+#ifdef CONFIG_PCIEAER
+ &aer_stats_attr_group,
+#endif
NULL,
};
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 0759a7be9ef2..679f1edb73e6 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -456,6 +456,7 @@ static inline int devm_of_pci_get_host_bridge_resources(struct device *dev,
void pci_no_aer(void);
void pci_aer_init(struct pci_dev *dev);
void pci_aer_exit(struct pci_dev *dev);
+extern const struct attribute_group aer_stats_attr_group;
#else
static inline void pci_no_aer(void) { }
static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; }
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 6aa5284d5805..15c6ae4b9754 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -562,6 +562,99 @@ static const char *aer_agent_string[] = {
"Transmitter ID"
};
+#define aer_stats_dev_attr(name, stats_array, strings_array, \
+ total_string, total_field) \
+ static ssize_t \
+ name##_show(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ unsigned int i; \
+ char *str = buf; \
+ struct pci_dev *pdev = to_pci_dev(dev); \
+ u64 *stats = pdev->aer_stats->stats_array; \
+ \
+ for (i = 0; i < ARRAY_SIZE(strings_array); i++) { \
+ if (strings_array[i]) \
+ str += sprintf(str, "%s %llu\n", \
+ strings_array[i], stats[i]); \
+ else if (stats[i]) \
+ str += sprintf(str, #stats_array "_bit[%d] %llu\n",\
+ i, stats[i]); \
+ } \
+ str += sprintf(str, "TOTAL_%s %llu\n", total_string, \
+ pdev->aer_stats->total_field); \
+ return str-buf; \
+} \
+static DEVICE_ATTR_RO(name)
+
+aer_stats_dev_attr(aer_dev_correctable, dev_cor_errs,
+ aer_correctable_error_string, "ERR_COR",
+ dev_total_cor_errs);
+aer_stats_dev_attr(aer_dev_fatal, dev_fatal_errs,
+ aer_uncorrectable_error_string, "ERR_FATAL",
+ dev_total_fatal_errs);
+aer_stats_dev_attr(aer_dev_nonfatal, dev_nonfatal_errs,
+ aer_uncorrectable_error_string, "ERR_NONFATAL",
+ dev_total_nonfatal_errs);
+
+static struct attribute *aer_stats_attrs[] __ro_after_init = {
+ &dev_attr_aer_dev_correctable.attr,
+ &dev_attr_aer_dev_fatal.attr,
+ &dev_attr_aer_dev_nonfatal.attr,
+ NULL
+};
+
+static umode_t aer_stats_attrs_are_visible(struct kobject *kobj,
+ struct attribute *a, int n)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ if (!pdev->aer_stats)
+ return 0;
+
+ return a->mode;
+}
+
+const struct attribute_group aer_stats_attr_group = {
+ .attrs = aer_stats_attrs,
+ .is_visible = aer_stats_attrs_are_visible,
+};
+
+static void pci_dev_aer_stats_incr(struct pci_dev *pdev,
+ struct aer_err_info *info)
+{
+ int status, i, max = -1;
+ u64 *counter = NULL;
+ struct aer_stats *aer_stats = pdev->aer_stats;
+
+ if (!aer_stats)
+ return;
+
+ switch (info->severity) {
+ case AER_CORRECTABLE:
+ aer_stats->dev_total_cor_errs++;
+ counter = &aer_stats->dev_cor_errs[0];
+ max = AER_MAX_TYPEOF_COR_ERRS;
+ break;
+ case AER_NONFATAL:
+ aer_stats->dev_total_nonfatal_errs++;
+ counter = &aer_stats->dev_nonfatal_errs[0];
+ max = AER_MAX_TYPEOF_UNCOR_ERRS;
+ break;
+ case AER_FATAL:
+ aer_stats->dev_total_fatal_errs++;
+ counter = &aer_stats->dev_fatal_errs[0];
+ max = AER_MAX_TYPEOF_UNCOR_ERRS;
+ break;
+ }
+
+ status = (info->status & ~info->mask);
+ for (i = 0; i < max; i++)
+ if (status & (1 << i))
+ counter[i]++;
+}
+
static void __print_tlp_header(struct pci_dev *dev,
struct aer_header_log_regs *t)
{
@@ -594,6 +687,7 @@ static void __aer_print_error(struct pci_dev *dev,
pci_err(dev, " [%2d] Unknown Error Bit%s\n",
i, info->first_error == i ? " (First)" : "");
}
+ pci_dev_aer_stats_incr(dev, info);
}
static void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
--
2.18.0.rc2.346.g013aa6912e-goog
Add sysfs attributes for rootport statistics (that are cumulative
of all the ERR_* messages seen on this PCI hierarchy).
Signed-off-by: Rajat Jain <[email protected]>
---
.../testing/sysfs-bus-pci-devices-aer_stats | 28 +++++++++++
drivers/pci/pcie/aer.c | 47 +++++++++++++++++++
2 files changed, 75 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats b/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
index 7dd54bdf910b..3fec94c8e6e2 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
+++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
@@ -92,3 +92,31 @@ AtomicOp Egress Blocked 0
TLP Prefix Blocked Error 0
TOTAL_ERR_NONFATAL 0
-------------------------------------------------------------------------
+
+============================
+PCIe Rootport AER statistics
+============================
+These attributes show up under only the rootports (or root complex event
+collectors) that are AER capable. These indicate the number of error messages as
+"reported to" the rootport. Please note that the rootports also transmit
+(internally) the ERR_* messages for errors seen by the internal rootport PCI
+device, so these counters includes them and are thus cumulative of all the error
+messages on the PCI hierarchy originating at that root port.
+
+Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_cor
+Date: July 2018
+Kernel Version: 4.19.0
+Contact: [email protected], [email protected]
+Description: Total number of ERR_COR messages reported to rootport.
+
+Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_fatal
+Date: July 2018
+Kernel Version: 4.19.0
+Contact: [email protected], [email protected]
+Description: Total number of ERR_FATAL messages reported to rootport.
+
+Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_nonfatal
+Date: July 2018
+Kernel Version: 4.19.0
+Contact: [email protected], [email protected]
+Description: Total number of ERR_NONFATAL messages reported to rootport.
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 15c6ae4b9754..6801cde534d5 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -597,10 +597,30 @@ aer_stats_dev_attr(aer_dev_nonfatal, dev_nonfatal_errs,
aer_uncorrectable_error_string, "ERR_NONFATAL",
dev_total_nonfatal_errs);
+#define aer_stats_rootport_attr(name, field) \
+ static ssize_t \
+ name##_show(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct pci_dev *pdev = to_pci_dev(dev); \
+ return sprintf(buf, "%llu\n", pdev->aer_stats->field); \
+} \
+static DEVICE_ATTR_RO(name)
+
+aer_stats_rootport_attr(aer_rootport_total_err_cor,
+ rootport_total_cor_errs);
+aer_stats_rootport_attr(aer_rootport_total_err_fatal,
+ rootport_total_fatal_errs);
+aer_stats_rootport_attr(aer_rootport_total_err_nonfatal,
+ rootport_total_nonfatal_errs);
+
static struct attribute *aer_stats_attrs[] __ro_after_init = {
&dev_attr_aer_dev_correctable.attr,
&dev_attr_aer_dev_fatal.attr,
&dev_attr_aer_dev_nonfatal.attr,
+ &dev_attr_aer_rootport_total_err_cor.attr,
+ &dev_attr_aer_rootport_total_err_fatal.attr,
+ &dev_attr_aer_rootport_total_err_nonfatal.attr,
NULL
};
@@ -613,6 +633,12 @@ static umode_t aer_stats_attrs_are_visible(struct kobject *kobj,
if (!pdev->aer_stats)
return 0;
+ if ((a == &dev_attr_aer_rootport_total_err_cor.attr ||
+ a == &dev_attr_aer_rootport_total_err_fatal.attr ||
+ a == &dev_attr_aer_rootport_total_err_nonfatal.attr) &&
+ pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT)
+ return 0;
+
return a->mode;
}
@@ -655,6 +681,25 @@ static void pci_dev_aer_stats_incr(struct pci_dev *pdev,
counter[i]++;
}
+static void pci_rootport_aer_stats_incr(struct pci_dev *pdev,
+ struct aer_err_source *e_src)
+{
+ struct aer_stats *aer_stats = pdev->aer_stats;
+
+ if (!aer_stats)
+ return;
+
+ if (e_src->status & PCI_ERR_ROOT_COR_RCV)
+ aer_stats->rootport_total_cor_errs++;
+
+ if (e_src->status & PCI_ERR_ROOT_UNCOR_RCV) {
+ if (e_src->status & PCI_ERR_ROOT_FATAL_RCV)
+ aer_stats->rootport_total_fatal_errs++;
+ else
+ aer_stats->rootport_total_nonfatal_errs++;
+ }
+}
+
static void __print_tlp_header(struct pci_dev *dev,
struct aer_header_log_regs *t)
{
@@ -1105,6 +1150,8 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
struct pci_dev *pdev = rpc->rpd;
struct aer_err_info *e_info = &rpc->e_info;
+ pci_rootport_aer_stats_incr(pdev, e_src);
+
/*
* There is a possibility that both correctable error and
* uncorrectable error being logged. Report correctable error first.
--
2.18.0.rc2.346.g013aa6912e-goog
Define a structure to hold the AER statistics. There are 2 groups
of statistics: dev_* counters that are to be collected for all AER
capable devices and rootport_* counters that are collected for all
(AER capable) rootports only. Allocate and free this structure when
device is added or released (thus counters survive the lifetime of the
device).
Signed-off-by: Rajat Jain <[email protected]>
---
drivers/pci/pci.h | 2 ++
drivers/pci/pcie/aer.c | 53 ++++++++++++++++++++++++++++++++++++++++--
drivers/pci/probe.c | 1 +
include/linux/pci.h | 1 +
4 files changed, 55 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 9a1af85aca77..0759a7be9ef2 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -455,9 +455,11 @@ static inline int devm_of_pci_get_host_bridge_resources(struct device *dev,
#ifdef CONFIG_PCIEAER
void pci_no_aer(void);
void pci_aer_init(struct pci_dev *dev);
+void pci_aer_exit(struct pci_dev *dev);
#else
static inline void pci_no_aer(void) { }
static inline int pci_aer_init(struct pci_dev *d) { return -ENODEV; }
+static inline void pci_aer_exit(struct pci_dev *d) { }
#endif
#endif /* DRIVERS_PCI_H */
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 11482669b93b..6aa5284d5805 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -33,6 +33,9 @@
#define AER_ERROR_SOURCES_MAX 100
#define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */
+#define AER_MAX_TYPEOF_COR_ERRS 16 /* as per PCI_ERR_COR_STATUS */
+#define AER_MAX_TYPEOF_UNCOR_ERRS 26 /* as per PCI_ERR_UNCOR_STATUS*/
+
struct aer_err_info {
struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
int error_dev_num;
@@ -76,6 +79,42 @@ struct aer_rpc {
*/
};
+/* AER stats for the device */
+struct aer_stats {
+
+ /*
+ * Fields for all AER capable devices. They indicate the errors
+ * "as seen by this device". Note that this may mean that if an
+ * end point is causing problems, the AER counters may increment
+ * at its link partner (e.g. root port) because the errors will be
+ * "seen" by the link partner and not the the problematic end point
+ * itself (which may report all counters as 0 as it never saw any
+ * problems).
+ */
+ /* Counters for different type of correctable errors */
+ u64 dev_cor_errs[AER_MAX_TYPEOF_COR_ERRS];
+ /* Counters for different type of fatal uncorrectable errors */
+ u64 dev_fatal_errs[AER_MAX_TYPEOF_UNCOR_ERRS];
+ /* Counters for different type of nonfatal uncorrectable errors */
+ u64 dev_nonfatal_errs[AER_MAX_TYPEOF_UNCOR_ERRS];
+ /* Total number of ERR_COR sent by this device */
+ u64 dev_total_cor_errs;
+ /* Total number of ERR_FATAL sent by this device */
+ u64 dev_total_fatal_errs;
+ /* Total number of ERR_NONFATAL sent by this device */
+ u64 dev_total_nonfatal_errs;
+
+ /*
+ * Fields for Root ports & root complex event collectors only, these
+ * indicate the total number of ERR_COR, ERR_FATAL, and ERR_NONFATAL
+ * messages received by the root port / event collector, INCLUDING the
+ * ones that are generated internally (by the rootport itself)
+ */
+ u64 rootport_total_cor_errs;
+ u64 rootport_total_fatal_errs;
+ u64 rootport_total_nonfatal_errs;
+};
+
#define AER_LOG_TLP_MASKS (PCI_ERR_UNC_POISON_TLP| \
PCI_ERR_UNC_ECRC| \
PCI_ERR_UNC_UNSUP| \
@@ -405,9 +444,19 @@ int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
void pci_aer_init(struct pci_dev *dev)
{
dev->aer_cap = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
+
+ if (dev->aer_cap)
+ dev->aer_stats = kzalloc(sizeof(struct aer_stats), GFP_KERNEL);
+
pci_cleanup_aer_error_status_regs(dev);
}
+void pci_aer_exit(struct pci_dev *dev)
+{
+ kfree(dev->aer_stats);
+ dev->aer_stats = NULL;
+}
+
#define AER_AGENT_RECEIVER 0
#define AER_AGENT_REQUESTER 1
#define AER_AGENT_COMPLETER 2
@@ -458,7 +507,7 @@ static const char *aer_error_layer[] = {
"Transaction Layer"
};
-static const char *aer_correctable_error_string[] = {
+static const char *aer_correctable_error_string[AER_MAX_TYPEOF_COR_ERRS] = {
"Receiver Error", /* Bit Position 0 */
NULL,
NULL,
@@ -477,7 +526,7 @@ static const char *aer_correctable_error_string[] = {
"Header Log Overflow", /* Bit Position 15 */
};
-static const char *aer_uncorrectable_error_string[] = {
+static const char *aer_uncorrectable_error_string[AER_MAX_TYPEOF_UNCOR_ERRS] = {
"Undefined", /* Bit Position 0 */
NULL,
NULL,
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ac876e32de4b..48edd0c9e4bc 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2064,6 +2064,7 @@ static void pci_configure_device(struct pci_dev *dev)
static void pci_release_capabilities(struct pci_dev *dev)
{
+ pci_aer_exit(dev);
pci_vpd_release(dev);
pci_iov_release(dev);
pci_free_cap_save_buffers(dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b4ffea05c999..6bc0aa0fc33f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -299,6 +299,7 @@ struct pci_dev {
u8 hdr_type; /* PCI header type (`multi' flag masked out) */
#ifdef CONFIG_PCIEAER
u16 aer_cap; /* AER capability offset */
+ struct aer_stats *aer_stats; /* AER stats for this device */
#endif
u8 pcie_cap; /* PCIe capability offset */
u8 msi_cap; /* MSI capability offset */
--
2.18.0.rc2.346.g013aa6912e-goog
On Thu, Jun 21, 2018 at 04:48:25PM -0700, Rajat Jain wrote:
> This is a follow up to:
> https://lkml.org/lkml/2018/5/22/1057
>
> Respinning as a new patchset because the old one has been refactored
> to include new patches (that were not part of original), and dropping
> some patches. The major changes are:
>
> * Provide breakdown of Fatal / non fatal errors separately
> * Include the "total" in the same file
> * do some PCI cleanup before the actual aer_stats stuff
> * Include documentation in the main patch
> * Rename variables / attributes to better match the newer reality.
>
> Rajat Jain (4):
> PCI: Move pci_aer_init() and pci_no_aer() declarations to
> drivers/pci/pci.h
> PCI/AER: Define and allocate aer_stats structure for AER capable
> devices
> PCI/AER: Add sysfs attributes to provide AER stats and breakdown
> PCI/AER: Add sysfs attributes for rootport cumulative stats
>
> .../testing/sysfs-bus-pci-devices-aer_stats | 122 +++++++++++
> Documentation/PCI/pcieaer-howto.txt | 5 +
> drivers/pci/pci-sysfs.c | 3 +
> drivers/pci/pci.h | 11 +
> drivers/pci/pcie/aer.c | 198 +++++++++++++++++-
> drivers/pci/probe.c | 1 +
> include/linux/pci.h | 5 +-
> 7 files changed, 337 insertions(+), 8 deletions(-)
> create mode 100644 Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats
Applied to pci/aer for v4.19, thanks!