| What: /sys/bus/platform/devices/dfl-port.0/id |
| Date: June 2018 |
| KernelVersion: 4.19 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-only. It returns id of this port. One DFL FPGA device |
| may have more than one port. Userspace could use this id to |
| distinguish different ports under same FPGA device. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/afu_id |
| Date: June 2018 |
| KernelVersion: 4.19 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-only. User can program different PR bitstreams to FPGA |
| Accelerator Function Unit (AFU) for different functions. It |
| returns uuid which could be used to identify which PR bitstream |
| is programmed in this AFU. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/power_state |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-only. It reports the APx (AFU Power) state, different APx |
| means different throttling level. When reading this file, it |
| returns "0" - Normal / "1" - AP1 / "2" - AP2 / "6" - AP6. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/ap1_event |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-write. Read this file for AP1 (AFU Power State 1) event. |
| It's used to indicate transient AP1 state. Write 1 to this |
| file to clear AP1 event. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/ap2_event |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-write. Read this file for AP2 (AFU Power State 2) event. |
| It's used to indicate transient AP2 state. Write 1 to this |
| file to clear AP2 event. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/ltr |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-write. Read or set AFU latency tolerance reporting value. |
| Set ltr to 1 if the AFU can tolerate latency >= 40us or set it |
| to 0 if it is latency sensitive. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/userclk_freqcmd |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Write-only. User writes command to this interface to set |
| userclock to AFU. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/userclk_freqsts |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-only. Read this file to get the status of issued command |
| to userclck_freqcmd. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/userclk_freqcntrcmd |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Write-only. User writes command to this interface to set |
| userclock counter. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/userclk_freqcntrsts |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-only. Read this file to get the status of issued command |
| to userclck_freqcntrcmd. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/errors/errors |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-Write. Read this file to get errors detected on port and |
| Accelerated Function Unit (AFU). Write error code to this file |
| to clear errors. Write fails with -EINVAL if input parsing |
| fails or input error code doesn't match. Write fails with |
| -EBUSY or -ETIMEDOUT if error can't be cleared as hardware |
| in low power state (-EBUSY) or not respoding (-ETIMEDOUT). |
| |
| What: /sys/bus/platform/devices/dfl-port.0/errors/first_error |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-only. Read this file to get the first error detected by |
| hardware. |
| |
| What: /sys/bus/platform/devices/dfl-port.0/errors/first_malformed_req |
| Date: August 2019 |
| KernelVersion: 5.4 |
| Contact: Wu Hao <hao.wu@intel.com> |
| Description: Read-only. Read this file to get the first malformed request |
| captured by hardware. |
