drm/amdgpu: expose AMDGPU_GEM_CREATE_VRAM_CLEARED to user space

V2: fix the return value for fill failure and validate bo before
filling data

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Flora Cui <Flora.Cui@amd.com>
Reviewed-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 67de19c46ddb..d8e69a7e51f9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -340,11 +340,44 @@ int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
         if (unlikely(r != 0)) {
                 return r;
         }
+
+        if (flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
+            bo->tbo.mem.placement & TTM_PL_FLAG_VRAM) {
+                struct fence *fence;
+
+                if (adev->mman.buffer_funcs_ring == NULL ||
+                   !adev->mman.buffer_funcs_ring->ready) {
+                        r = -EBUSY;
+                        goto fail_free;
+                }
+
+                r = amdgpu_bo_reserve(bo, false);
+                if (unlikely(r != 0))
+                        goto fail_free;
+
+                amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_VRAM);
+                r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
+                if (unlikely(r != 0))
+                        goto fail_unreserve;
+
+                amdgpu_fill_buffer(bo, 0, bo->tbo.resv, &fence);
+                amdgpu_bo_fence(bo, fence, false);
+                amdgpu_bo_unreserve(bo);
+                fence_put(bo->tbo.moving);
+                bo->tbo.moving = fence_get(fence);
+                fence_put(fence);
+        }
         *bo_ptr = bo;
 
         trace_amdgpu_bo_create(bo);
 
         return 0;
+
+fail_unreserve:
+        amdgpu_bo_unreserve(bo);
+fail_free:
+        amdgpu_bo_unref(&bo);
+        return r;
 }
 
 int amdgpu_bo_create(struct amdgpu_device *adev,