What: /sys/class/fpga_manager//name Date: August 2015 KernelVersion: 4.3 Contact: Alan Tull Description: Name of low level fpga manager driver. What: /sys/class/fpga_manager//state Date: August 2015 KernelVersion: 4.3 Contact: Alan Tull Description: Read fpga manager state as a string. The intent is to provide enough detail that if something goes wrong during FPGA programming (something that the driver can't fix) then userspace can know, i.e. if the firmware request fails, that could be due to not being able to find the firmware file. This is a superset of FPGA states and fpga manager driver states. The fpga manager driver is walking through these steps to get the FPGA into a known operating state. It's a sequence, though some steps may get skipped. Valid FPGA states will vary by manufacturer; this is a superset. * unknown = can't determine state * power off = FPGA power is off * power up = FPGA reports power is up * reset = FPGA held in reset state * firmware request = firmware class request in progress * firmware request error = firmware request failed * write init = preparing FPGA for programming * write init error = Error while preparing FPGA for programming * write = FPGA ready to receive image data * write error = Error while programming * write complete = Doing post programming steps * write complete error = Error while doing post programming * operating = FPGA is programmed and operating What: /sys/class/fpga_manager//status Date: June 2018 KernelVersion: 4.19 Contact: Wu Hao Description: Read fpga manager status as a string. If FPGA programming operation fails, it could be caused by crc error or incompatible bitstream image. The intent of this interface is to provide more detailed information for FPGA programming errors to userspace. This is a list of strings for the supported status. * reconfig operation error - invalid operations detected by reconfiguration hardware. e.g. start reconfiguration with errors not cleared * reconfig CRC error - CRC error detected by reconfiguration hardware. * reconfig incompatible image - reconfiguration image is incompatible with hardware * reconfig IP protocol error - protocol errors detected by reconfiguration hardware * reconfig fifo overflow error - FIFO overflow detected by reconfiguration hardware