mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 14:21:55 +07:00
afb79e993a
Add documentation under drivers/staging for new fpga manager's sysfs interface. Signed-off-by: Alan Tull <atull@opensource.altera.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
What: /sys/class/fpga_manager/<fpga>/name
|
|
Date: August 2015
|
|
KernelVersion: 4.3
|
|
Contact: Alan Tull <atull@opensource.altera.com>
|
|
Description: Name of low level fpga manager driver.
|
|
|
|
What: /sys/class/fpga_manager/<fpga>/state
|
|
Date: August 2015
|
|
KernelVersion: 4.3
|
|
Contact: Alan Tull <atull@opensource.altera.com>
|
|
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
|