accel/habanalabs: add pci health check during heartbeat

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[ Upstream commit d8b9cea584 ]

Currently upon a heartbeat failure, we don't know if the failure
is due to firmware hang or due to a bad PCI link. Hence, we
are reading a PCI config space register with a known value (vendor ID)
so we will know which of the two possibilities caused the heartbeat
failure.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Ofir Bitton 2023-04-18 14:48:22 +03:00 • committed by Greg Kroah-Hartman

parent 4503b78fe6

commit 7f59afa93f

3 changed files with 16 additions and 3 deletions

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15

drivers/accel/habanalabs/common/device.c

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2

drivers/accel/habanalabs/common/habanalabs.h

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2

drivers/accel/habanalabs/common/habanalabs_drv.c

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