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1What: /sys/bus/dfl/devices/dfl_dev.X/fec_mode2Date: Oct 20203KernelVersion: 5.124Contact: Xu Yilun <yilun.xu@intel.com>5Description: Read-only. Returns the FEC mode of the 25G links of the6 ethernet retimers configured by Nios firmware. "rs" for Reed7 Solomon FEC, "kr" for Fire Code FEC, "no" for NO FEC.8 "not supported" if the FEC mode setting is not supported, this9 happens when the Nios firmware version major < 3, or no link is10 configured to 25G.11 Format: string12 13What: /sys/bus/dfl/devices/dfl_dev.X/retimer_A_mode14Date: Oct 202015KernelVersion: 5.1216Contact: Xu Yilun <yilun.xu@intel.com>17Description: Read-only. Returns the enumeration value of the working mode of18 the retimer A configured by the Nios firmware. The value is19 read out from shared registers filled by the Nios firmware. Now20 the values could be:21 22 - "0": Reset23 - "1": 4x10G24 - "2": 4x25G25 - "3": 2x25G26 - "4": 2x25G+2x10G27 - "5": 1x25G28 29 If the Nios firmware is updated in future to support more30 retimer modes, more enumeration value is expected.31 Format: 0x%x32 33What: /sys/bus/dfl/devices/dfl_dev.X/retimer_B_mode34Date: Oct 202035KernelVersion: 5.1236Contact: Xu Yilun <yilun.xu@intel.com>37Description: Read-only. Returns the enumeration value of the working mode of38 the retimer B configured by the Nios firmware. The value format39 is the same as retimer_A_mode.40 41What: /sys/bus/dfl/devices/dfl_dev.X/nios_fw_version42Date: Oct 202043KernelVersion: 5.1244Contact: Xu Yilun <yilun.xu@intel.com>45Description: Read-only. Returns the version of the Nios firmware in the46 FPGA. Its format is "major.minor.patch".47 Format: %x.%x.%x48