drm/amdgpu: enable retry fault wptr overflow

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If xnack is on, VM retry fault interrupt send to IH ring1, and ring1
will be full quickly. IH cannot receive other interrupts, this causes
deadlock if migrating buffer using sdma and waiting for sdma done while
handling retry fault.

Remove VMC from IH storm client, enable ring1 write pointer overflow,
then IH will drop retry fault interrupts and be able to receive other
interrupts while driver is handling retry fault.

IH ring1 write pointer doesn't writeback to memory by IH, and ring1
write pointer recorded by self-irq is not updated, so always read
the latest ring1 write pointer from register.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Philip Yang 2020-09-22 13:09:33 -04:00 • committed by Alex Deucher

parent df23d1bbd1

commit b672cb1eee

2 changed files with 22 additions and 42 deletions

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32

drivers/gpu/drm/amd/amdgpu/vega10_ih.c

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32

drivers/gpu/drm/amd/amdgpu/vega20_ih.c

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