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fpga: mgr: add status for fpga-manager

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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 <[email protected]>
Acked-by: Alan Tull <[email protected]>
Acked-by: Moritz Fischer <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Wu Hao 2018-06-30 08:53:10 +08:00 • committed by Greg Kroah-Hartman
commit ecb5fbe299
3 changed files with 61 additions and 0 deletions
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24
Documentation/ABI/testing/sysfs-class-fpga-manager
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@ -35,3 +35,27 @@ Description: Read fpga manager state as a string.
* 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/<fpga>/status
Date: June 2018
KernelVersion: 4.19
Contact: Wu Hao <[email protected]>
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