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Diffstat (limited to 'Documentation/ABI/testing/sysfs-platform-mellanox-pmc')
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diff --git a/Documentation/ABI/testing/sysfs-platform-mellanox-pmc b/Documentation/ABI/testing/sysfs-platform-mellanox-pmc new file mode 100644 index 000000000000..29b3f9c58e00 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform-mellanox-pmc @@ -0,0 +1,64 @@ +HID Driver Description +MLNXBFD0 mlxbf-pmc Performance counters (BlueField-1) +MLNXBFD1 mlxbf-pmc Performance counters (BlueField-2) +MLNXBFD2 mlxbf-pmc Performance counters (BlueField-3) + +What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/event_list +Date: Dec 2020 +KernelVersion: 5.10 +Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>" +Description: + List of events supported by the counters in the specific block. + It is used to extract the event number or ID associated with + each event. + +What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/event<N> +Date: Dec 2020 +KernelVersion: 5.10 +Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>" +Description: + Event monitored by corresponding counter. This is used to + program or read back the event that should be or is currently + being monitored by counter<N>. + +What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/counter<N> +Date: Dec 2020 +KernelVersion: 5.10 +Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>" +Description: + Counter value of the event being monitored. This is used to + read the counter value of the event which was programmed using + event<N>. This is also used to clear or reset the counter value + by writing 0 to the counter sysfs. + +What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/enable +Date: Dec 2020 +KernelVersion: 5.10 +Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>" +Description: + Start or stop counters. This is used to start the counters + for monitoring the programmed events and also to stop the + counters after the desired duration. Writing value 1 will + start all the counters in the block, and writing 0 will + stop all the counters together. + +What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/<reg> +Date: Dec 2020 +KernelVersion: 5.10 +Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>" +Description: + Value of register. This is used to read or reset the registers + where various performance statistics are counted for each block. + Writing 0 to the sysfs will clear the counter, writing any other + value is not allowed. + +What: /sys/bus/platform/devices/<HID>/hwmon/hwmonX/<block>/count_clock +Date: Mar 2025 +KernelVersion: 6.14 +Contact: "Shravan Kumar Ramani <shravankr@nvidia.com>" +Description: + Use a counter for counting cycles. This is used to repurpose/dedicate + any of the counters in the block to counting cycles. Each counter is + represented by a bit (bit 0 for counter0, bit1 for counter1 and so on) + and setting the corresponding bit will reserve that specific counter + for counting cycles and override the event<N> setting. |