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12833017e5
Add sysfs attributes for rootport statistics (that are cumulative of all the ERR_* messages seen on this PCI hierarchy). Signed-off-by: Rajat Jain <rajatja@google.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
123 lines
4.6 KiB
Plaintext
123 lines
4.6 KiB
Plaintext
==========================
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PCIe Device AER statistics
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==========================
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These attributes show up under all the devices that are AER capable. These
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statistical counters indicate the errors "as seen/reported by the device".
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Note that this may mean that if an endpoint is causing problems, the AER
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counters may increment at its link partner (e.g. root port) because the
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errors may be "seen" / reported by the link partner and not the
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problematic endpoint itself (which may report all counters as 0 as it never
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saw any problems).
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Where: /sys/bus/pci/devices/<dev>/aer_dev_correctable
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Date: July 2018
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Kernel Version: 4.19.0
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Contact: linux-pci@vger.kernel.org, rajatja@google.com
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Description: List of correctable errors seen and reported by this
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PCI device using ERR_COR. Note that since multiple errors may
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be reported using a single ERR_COR message, thus
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TOTAL_ERR_COR at the end of the file may not match the actual
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total of all the errors in the file. Sample output:
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-------------------------------------------------------------------------
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localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_correctable
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Receiver Error 2
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Bad TLP 0
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Bad DLLP 0
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RELAY_NUM Rollover 0
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Replay Timer Timeout 0
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Advisory Non-Fatal 0
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Corrected Internal Error 0
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Header Log Overflow 0
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TOTAL_ERR_COR 2
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-------------------------------------------------------------------------
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Where: /sys/bus/pci/devices/<dev>/aer_dev_fatal
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Date: July 2018
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Kernel Version: 4.19.0
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Contact: linux-pci@vger.kernel.org, rajatja@google.com
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Description: List of uncorrectable fatal errors seen and reported by this
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PCI device using ERR_FATAL. Note that since multiple errors may
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be reported using a single ERR_FATAL message, thus
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TOTAL_ERR_FATAL at the end of the file may not match the actual
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total of all the errors in the file. Sample output:
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-------------------------------------------------------------------------
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localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_fatal
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Undefined 0
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Data Link Protocol 0
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Surprise Down Error 0
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Poisoned TLP 0
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Flow Control Protocol 0
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Completion Timeout 0
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Completer Abort 0
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Unexpected Completion 0
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Receiver Overflow 0
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Malformed TLP 0
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ECRC 0
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Unsupported Request 0
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ACS Violation 0
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Uncorrectable Internal Error 0
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MC Blocked TLP 0
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AtomicOp Egress Blocked 0
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TLP Prefix Blocked Error 0
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TOTAL_ERR_FATAL 0
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-------------------------------------------------------------------------
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Where: /sys/bus/pci/devices/<dev>/aer_dev_nonfatal
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Date: July 2018
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Kernel Version: 4.19.0
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Contact: linux-pci@vger.kernel.org, rajatja@google.com
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Description: List of uncorrectable nonfatal errors seen and reported by this
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PCI device using ERR_NONFATAL. Note that since multiple errors
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may be reported using a single ERR_FATAL message, thus
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TOTAL_ERR_NONFATAL at the end of the file may not match the
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actual total of all the errors in the file. Sample output:
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-------------------------------------------------------------------------
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localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_nonfatal
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Undefined 0
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Data Link Protocol 0
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Surprise Down Error 0
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Poisoned TLP 0
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Flow Control Protocol 0
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Completion Timeout 0
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Completer Abort 0
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Unexpected Completion 0
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Receiver Overflow 0
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Malformed TLP 0
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ECRC 0
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Unsupported Request 0
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ACS Violation 0
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Uncorrectable Internal Error 0
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MC Blocked TLP 0
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AtomicOp Egress Blocked 0
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TLP Prefix Blocked Error 0
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TOTAL_ERR_NONFATAL 0
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-------------------------------------------------------------------------
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============================
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PCIe Rootport AER statistics
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============================
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These attributes show up under only the rootports (or root complex event
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collectors) that are AER capable. These indicate the number of error messages as
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"reported to" the rootport. Please note that the rootports also transmit
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(internally) the ERR_* messages for errors seen by the internal rootport PCI
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device, so these counters include them and are thus cumulative of all the error
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messages on the PCI hierarchy originating at that root port.
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Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_cor
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Date: July 2018
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Kernel Version: 4.19.0
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Contact: linux-pci@vger.kernel.org, rajatja@google.com
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Description: Total number of ERR_COR messages reported to rootport.
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Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_fatal
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Date: July 2018
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Kernel Version: 4.19.0
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Contact: linux-pci@vger.kernel.org, rajatja@google.com
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Description: Total number of ERR_FATAL messages reported to rootport.
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Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_nonfatal
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Date: July 2018
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Kernel Version: 4.19.0
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Contact: linux-pci@vger.kernel.org, rajatja@google.com
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Description: Total number of ERR_NONFATAL messages reported to rootport.
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