| 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. |
