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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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@@ -7315,10 +7315,17 @@ void amdgpu_device_flush_hdp(struct amdgpu_device *adev,
if (adev->gmc.xgmi.connected_to_cpu)
return;
if (ring && ring->funcs->emit_hdp_flush)
if (ring && ring->funcs->emit_hdp_flush) {
amdgpu_ring_emit_hdp_flush(ring);
else
amdgpu_asic_flush_hdp(adev, ring);
return;
}
if (!ring && amdgpu_sriov_runtime(adev)) {
if (!amdgpu_kiq_hdp_flush(adev))
return;
}
amdgpu_asic_flush_hdp(adev, ring);
}
void amdgpu_device_invalidate_hdp(struct amdgpu_device *adev,