1What: /sys/class/fpga_manager/<fpga>/name 2Date: August 2015 3KernelVersion: 4.3 4Contact: Alan Tull <atull@opensource.altera.com> 5Description: Name of low level fpga manager driver. 6 7What: /sys/class/fpga_manager/<fpga>/state 8Date: August 2015 9KernelVersion: 4.3 10Contact: Alan Tull <atull@opensource.altera.com> 11Description: Read fpga manager state as a string. 12 The intent is to provide enough detail that if something goes 13 wrong during FPGA programming (something that the driver can't 14 fix) then userspace can know, i.e. if the firmware request 15 fails, that could be due to not being able to find the firmware 16 file. 17 18 This is a superset of FPGA states and fpga manager driver 19 states. The fpga manager driver is walking through these steps 20 to get the FPGA into a known operating state. It's a sequence, 21 though some steps may get skipped. Valid FPGA states will vary 22 by manufacturer; this is a superset. 23 24 * unknown = can't determine state 25 * power off = FPGA power is off 26 * power up = FPGA reports power is up 27 * reset = FPGA held in reset state 28 * firmware request = firmware class request in progress 29 * firmware request error = firmware request failed 30 * write init = preparing FPGA for programming 31 * write init error = Error while preparing FPGA for 32 programming 33 * write = FPGA ready to receive image data 34 * write error = Error while programming 35 * write complete = Doing post programming steps 36 * write complete error = Error while doing post programming 37 * operating = FPGA is programmed and operating 38 39What: /sys/class/fpga_manager/<fpga>/status 40Date: June 2018 41KernelVersion: 4.19 42Contact: Wu Hao <hao.wu@intel.com> 43Description: Read fpga manager status as a string. 44 If FPGA programming operation fails, it could be caused by crc 45 error or incompatible bitstream image. The intent of this 46 interface is to provide more detailed information for FPGA 47 programming errors to userspace. This is a list of strings for 48 the supported status. 49 50 * reconfig operation error - invalid operations detected by 51 reconfiguration hardware. 52 e.g. start reconfiguration 53 with errors not cleared 54 * reconfig CRC error - CRC error detected by 55 reconfiguration hardware. 56 * reconfig incompatible image - reconfiguration image is 57 incompatible with hardware 58 * reconfig IP protocol error - protocol errors detected by 59 reconfiguration hardware 60 * reconfig fifo overflow error - FIFO overflow detected by 61 reconfiguration hardware 62