drm/amdgpu: Add mem sync flag for IB allocated by SA

JinzhouSu · alexdeucher · commit 5c88e3b86a88 · 2021-04-20T21:45:24.000-04:00
The buffer of SA bo will be used by many cases. So it's better
to invalidate the cache of indirect buffer allocated by SA before
commit the IB.

Signed-off-by: Jinzhou Su &lt;Jinzhou.Su@amd.com&gt;
Reviewed-by: Christian König &lt;christian.koenig@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -76,6 +76,8 @@ int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 		}
 
 		ib->ptr = amdgpu_sa_bo_cpu_addr(ib->sa_bo);
+		/* flush the cache before commit the IB */
+		ib->flags = AMDGPU_IB_FLAG_EMIT_MEM_SYNC;
 
 		if (!vm)
 			ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo);

Original file line number	Diff line number	Diff line change
`@@ -76,6 +76,8 @@ int amdgpu_ib_get(struct amdgpu_device adev, struct amdgpu_vm vm,`
`76`	`76`	`}`
`77`	`77`
`78`	`78`	`ib->ptr = amdgpu_sa_bo_cpu_addr(ib->sa_bo);`
	`79`	`+ /* flush the cache before commit the IB */`
	`80`	`+ ib->flags = AMDGPU_IB_FLAG_EMIT_MEM_SYNC;`
`79`	`81`
`80`	`82`	`if (!vm)`
`81`	`83`	`ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo);`