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| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats | 119 |
1 files changed, 119 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 000000000..860db5303 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-aer_stats @@ -0,0 +1,119 @@ +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). + +What: /sys/bus/pci/devices/<dev>/aer_dev_correctable +Date: July 2018 +KernelVersion: 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 + +What: /sys/bus/pci/devices/<dev>/aer_dev_fatal +Date: July 2018 +KernelVersion: 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 + +What: /sys/bus/pci/devices/<dev>/aer_dev_nonfatal +Date: July 2018 +KernelVersion: 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. + +What: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_cor +Date: July 2018 +KernelVersion: 4.19.0 +Contact: linux-pci@vger.kernel.org, rajatja@google.com +Description: Total number of ERR_COR messages reported to rootport. + +What: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_fatal +Date: July 2018 +KernelVersion: 4.19.0 +Contact: linux-pci@vger.kernel.org, rajatja@google.com +Description: Total number of ERR_FATAL messages reported to rootport. + +What: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_nonfatal +Date: July 2018 +KernelVersion: 4.19.0 +Contact: linux-pci@vger.kernel.org, rajatja@google.com +Description: Total number of ERR_NONFATAL messages reported to rootport. |