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Diffstat (limited to 'Documentation/ABI/testing/debugfs-driver-qat')
| -rw-r--r-- | Documentation/ABI/testing/debugfs-driver-qat | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/debugfs-driver-qat b/Documentation/ABI/testing/debugfs-driver-qat new file mode 100644 index 000000000000..6731ffacc5f0 --- /dev/null +++ b/Documentation/ABI/testing/debugfs-driver-qat @@ -0,0 +1,61 @@ +What: /sys/kernel/debug/qat_<device>_<BDF>/qat/fw_counters +Date: November 2023 +KernelVersion: 6.6 +Contact: qat-linux@intel.com +Description: (RO) Read returns the number of requests sent to the FW and the number of responses + received from the FW for each Acceleration Engine + Reported firmware counters:: + + <N>: Number of requests sent from Acceleration Engine N to FW and responses + Acceleration Engine N received from FW + +What: /sys/kernel/debug/qat_<device>_<BDF>/heartbeat/config +Date: November 2023 +KernelVersion: 6.6 +Contact: qat-linux@intel.com +Description: (RW) Read returns value of the Heartbeat update period. + Write to the file changes this period value. + + This period should reflect planned polling interval of device + health status. High frequency Heartbeat monitoring wastes CPU cycles + but minimizes the customer’s system downtime. Also, if there are + large service requests that take some time to complete, high frequency + Heartbeat monitoring could result in false reports of unresponsiveness + and in those cases, period needs to be increased. + + This parameter is effective only for c3xxx, c62x, dh895xcc devices. + 4xxx has this value internally fixed to 200ms. + + Default value is set to 500. Minimal allowed value is 200. + All values are expressed in milliseconds. + +What: /sys/kernel/debug/qat_<device>_<BDF>/heartbeat/queries_failed +Date: November 2023 +KernelVersion: 6.6 +Contact: qat-linux@intel.com +Description: (RO) Read returns the number of times the device became unresponsive. + + Attribute returns value of the counter which is incremented when + status query results negative. + +What: /sys/kernel/debug/qat_<device>_<BDF>/heartbeat/queries_sent +Date: November 2023 +KernelVersion: 6.6 +Contact: qat-linux@intel.com +Description: (RO) Read returns the number of times the control process checked + if the device is responsive. + + Attribute returns value of the counter which is incremented on + every status query. + +What: /sys/kernel/debug/qat_<device>_<BDF>/heartbeat/status +Date: November 2023 +KernelVersion: 6.6 +Contact: qat-linux@intel.com +Description: (RO) Read returns the device health status. + + Returns 0 when device is healthy or -1 when is unresponsive + or the query failed to send. + + The driver does not monitor for Heartbeat. It is left for a user + to poll the status periodically. |