drm/amdgpu: Make SDMA phase quantum configurable

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Set a configurable SDMA phase quantum when enabling SDMA context
switching. The default value significantly reduces SDMA latency
in page table updates when user-mode SDMA queues have concurrent
activity, compared to the initial HW setting.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Andres Rodriguez <andres.rodriguez@amd.com>
Reviewed-by: Shaoyun Liu <shaoyun.liu@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Felix Kuehling 2016-07-15 18:37:05 -04:00 • committed by Alex Deucher

parent 763dbbfa5f

commit a667386cb9

5 changed files with 100 additions and 3 deletions

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1

drivers/gpu/drm/amd/amdgpu/amdgpu.h

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4

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

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32

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

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32

drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c

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34

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

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