Commit 4cf400e1 authored by Eddie James's avatar Eddie James Committed by Joel Stanley
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docs: ABI: testing: Document the OCC hwmon FFDC binary interface 



Add documentation for the new binary sysfs that will dump the SBEFIFO
FFDC.

Signed-off-by: default avatarEddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20211019205307.36946-4-eajames@linux.ibm.com


Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
parent 8ec3cc9f

Documentation/ABI/testing/sysfs-bus-platform-devices-occ-hwmon

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What:		/sys/bus/platform/devices/occ-hwmon.X/ffdc

KernelVersion:	5.15

Contact:	eajames@linux.ibm.com

Description:

		Contains the First Failure Data Capture from the SBEFIFO

		hardware, if there is any from a previous transfer. Otherwise,

		the file is empty. The data is cleared when it's been

		completely read by a user. As the name suggests, only the data

		from the first error is saved, until it's cleared upon read. The OCC hwmon driver, running on

		a Baseboard Management Controller (BMC), communicates with

		POWER9 and up processors over the Self-Boot Engine (SBE) FIFO.

		In many error conditions, the SBEFIFO will return error data

		indicating the type of error and system state, etc.