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Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats | 122 |
1 files changed, 122 insertions, 0 deletions
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..4b0318c99507 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats @@ -0,0 +1,122 @@ +========================== +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 endpoint 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 +problematic endpoint 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: linux-pci@vger.kernel.org, rajatja@google.com +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: linux-pci@vger.kernel.org, rajatja@google.com +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: linux-pci@vger.kernel.org, rajatja@google.com +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 +------------------------------------------------------------------------- + +============================ +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 include 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: linux-pci@vger.kernel.org, rajatja@google.com +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: linux-pci@vger.kernel.org, rajatja@google.com +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: linux-pci@vger.kernel.org, rajatja@google.com +Description: Total number of ERR_NONFATAL messages reported to rootport. |