drm/amdgpu: use GPU_HDP_FLUSH for sriov

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Currently SRIOV runtime will use kiq to write HDP_MEM_FLUSH_CNTL for
hdp flush. This register need to be write from CPU for nbif to aware,
otherwise it will not work.

Implement amdgpu_kiq_hdp_flush and use kiq to do gpu hdp flush during
sriov runtime.

v2:
- fallback to amdgpu_asic_flush_hdp when amdgpu_kiq_hdp_flush failed
- add function amdgpu_mes_hdp_flush

v3:
- changed returned error

Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Victor Zhao <Victor.Zhao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Victor Zhao 2025-10-09 10:42:48 +08:00 • committed by Alex Deucher

parent e71ca1efd3

commit 6169b555db

5 changed files with 95 additions and 3 deletions

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13

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

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71

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

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1

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

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12

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

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1

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

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