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ecb5fbe299
This patch adds status sysfs interface for fpga manager, it's a read only interface which allows user to get fpga manager status, including full/partial reconfiguration error and other status information. It adds a status callback to fpga_manager_ops too, allows each fpga_manager driver to define its own method to collect latest status from hardware. The following sysfs file is created: * /sys/class/fpga_manager/<fpga>/status Return status of fpga manager, including reconfiguration errors. Signed-off-by: Wu Hao <hao.wu@intel.com> Acked-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
62 lines
2.5 KiB
Plaintext
62 lines
2.5 KiB
Plaintext
What: /sys/class/fpga_manager/<fpga>/name
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Date: August 2015
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KernelVersion: 4.3
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Contact: Alan Tull <atull@opensource.altera.com>
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Description: Name of low level fpga manager driver.
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What: /sys/class/fpga_manager/<fpga>/state
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Date: August 2015
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KernelVersion: 4.3
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Contact: Alan Tull <atull@opensource.altera.com>
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Description: Read fpga manager state as a string.
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The intent is to provide enough detail that if something goes
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wrong during FPGA programming (something that the driver can't
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fix) then userspace can know, i.e. if the firmware request
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fails, that could be due to not being able to find the firmware
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file.
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This is a superset of FPGA states and fpga manager driver
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states. The fpga manager driver is walking through these steps
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to get the FPGA into a known operating state. It's a sequence,
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though some steps may get skipped. Valid FPGA states will vary
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by manufacturer; this is a superset.
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* unknown = can't determine state
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* power off = FPGA power is off
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* power up = FPGA reports power is up
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* reset = FPGA held in reset state
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* firmware request = firmware class request in progress
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* firmware request error = firmware request failed
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* write init = preparing FPGA for programming
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* write init error = Error while preparing FPGA for
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programming
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* write = FPGA ready to receive image data
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* write error = Error while programming
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* write complete = Doing post programming steps
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* write complete error = Error while doing post programming
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* operating = FPGA is programmed and operating
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What: /sys/class/fpga_manager/<fpga>/status
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Date: June 2018
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KernelVersion: 4.19
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Contact: Wu Hao <hao.wu@intel.com>
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Description: Read fpga manager status as a string.
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If FPGA programming operation fails, it could be caused by crc
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error or incompatible bitstream image. The intent of this
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interface is to provide more detailed information for FPGA
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programming errors to userspace. This is a list of strings for
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the supported status.
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* reconfig operation error - invalid operations detected by
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reconfiguration hardware.
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e.g. start reconfiguration
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with errors not cleared
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* reconfig CRC error - CRC error detected by
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reconfiguration hardware.
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* reconfig incompatible image - reconfiguration image is
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incompatible with hardware
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* reconfig IP protocol error - protocol errors detected by
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reconfiguration hardware
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* reconfig fifo overflow error - FIFO overflow detected by
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reconfiguration hardware
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