1 ==========================
2 PCIe Device AER statistics
3 ==========================
4 These attributes show up under all the devices that are AER capable. These
5 statistical counters indicate the errors "as seen/reported by the device".
6 Note that this may mean that if an endpoint is causing problems, the AER
7 counters may increment at its link partner (e.g. root port) because the
8 errors may be "seen" / reported by the link partner and not the
9 problematic endpoint itself (which may report all counters as 0 as it never
12 Where: /sys/bus/pci/devices/<dev>/aer_dev_correctable
14 Kernel Version: 4.19.0
15 Contact: linux-pci@vger.kernel.org, rajatja@google.com
16 Description: List of correctable errors seen and reported by this
17 PCI device using ERR_COR. Note that since multiple errors may
18 be reported using a single ERR_COR message, thus
19 TOTAL_ERR_COR at the end of the file may not match the actual
20 total of all the errors in the file. Sample output:
21 -------------------------------------------------------------------------
22 localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_correctable
27 Replay Timer Timeout 0
29 Corrected Internal Error 0
32 -------------------------------------------------------------------------
34 Where: /sys/bus/pci/devices/<dev>/aer_dev_fatal
36 Kernel Version: 4.19.0
37 Contact: linux-pci@vger.kernel.org, rajatja@google.com
38 Description: List of uncorrectable fatal errors seen and reported by this
39 PCI device using ERR_FATAL. Note that since multiple errors may
40 be reported using a single ERR_FATAL message, thus
41 TOTAL_ERR_FATAL at the end of the file may not match the actual
42 total of all the errors in the file. Sample output:
43 -------------------------------------------------------------------------
44 localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_fatal
49 Flow Control Protocol 0
52 Unexpected Completion 0
58 Uncorrectable Internal Error 0
60 AtomicOp Egress Blocked 0
61 TLP Prefix Blocked Error 0
63 -------------------------------------------------------------------------
65 Where: /sys/bus/pci/devices/<dev>/aer_dev_nonfatal
67 Kernel Version: 4.19.0
68 Contact: linux-pci@vger.kernel.org, rajatja@google.com
69 Description: List of uncorrectable nonfatal errors seen and reported by this
70 PCI device using ERR_NONFATAL. Note that since multiple errors
71 may be reported using a single ERR_FATAL message, thus
72 TOTAL_ERR_NONFATAL at the end of the file may not match the
73 actual total of all the errors in the file. Sample output:
74 -------------------------------------------------------------------------
75 localhost /sys/devices/pci0000:00/0000:00:1c.0 # cat aer_dev_nonfatal
80 Flow Control Protocol 0
83 Unexpected Completion 0
89 Uncorrectable Internal Error 0
91 AtomicOp Egress Blocked 0
92 TLP Prefix Blocked Error 0
94 -------------------------------------------------------------------------
96 ============================
97 PCIe Rootport AER statistics
98 ============================
99 These attributes show up under only the rootports (or root complex event
100 collectors) that are AER capable. These indicate the number of error messages as
101 "reported to" the rootport. Please note that the rootports also transmit
102 (internally) the ERR_* messages for errors seen by the internal rootport PCI
103 device, so these counters include them and are thus cumulative of all the error
104 messages on the PCI hierarchy originating at that root port.
106 Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_cor
108 Kernel Version: 4.19.0
109 Contact: linux-pci@vger.kernel.org, rajatja@google.com
110 Description: Total number of ERR_COR messages reported to rootport.
112 Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_fatal
114 Kernel Version: 4.19.0
115 Contact: linux-pci@vger.kernel.org, rajatja@google.com
116 Description: Total number of ERR_FATAL messages reported to rootport.
118 Where: /sys/bus/pci/devices/<dev>/aer_stats/aer_rootport_total_err_nonfatal
120 Kernel Version: 4.19.0
121 Contact: linux-pci@vger.kernel.org, rajatja@google.com
122 Description: Total number of ERR_NONFATAL messages reported to rootport.