drm/amdgpu: improve AMDGPU_GEM_CREATE_VRAM_CLEARED handling (v2)

Drop this whole reserve/unreserve dance, just lock the
reservation object manually when creating the BO.

v2: rebase on dma_fence renaming

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

1 files changed, 14 insertions, 15 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 611da3bd2981..bf79b73e1538 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -371,36 +371,36 @@ int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
 
         amdgpu_fill_placement_to_bo(bo, placement);
         /* Kernel allocation are uninterruptible */
+
+        if (!resv) {
+                bool locked;
+
+                reservation_object_init(&bo->tbo.ttm_resv);
+                locked = ww_mutex_trylock(&bo->tbo.ttm_resv.lock);
+                WARN_ON(!locked);
+        }
         r = ttm_bo_init(&adev->mman.bdev, &bo->tbo, size, type,
                         &bo->placement, page_align, !kernel, NULL,
-                        acc_size, sg, resv, &amdgpu_ttm_bo_destroy);
-        if (unlikely(r != 0)) {
+                        acc_size, sg, resv ? resv : &bo->tbo.ttm_resv,
+                        &amdgpu_ttm_bo_destroy);
+        if (unlikely(r != 0))
                 return r;
-        }
 
         if (flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
             bo->tbo.mem.placement & TTM_PL_FLAG_VRAM) {
                 struct dma_fence *fence;
 
-                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;
-
                 r = amdgpu_fill_buffer(bo, 0, bo->tbo.resv, &fence);
                 if (unlikely(r))
                         goto fail_unreserve;
 
                 amdgpu_bo_fence(bo, fence, false);
-                amdgpu_bo_unreserve(bo);
                 dma_fence_put(bo->tbo.moving);
                 bo->tbo.moving = dma_fence_get(fence);
                 dma_fence_put(fence);
         }
+        if (!resv)
+                ww_mutex_unlock(&bo->tbo.resv->lock);
         *bo_ptr = bo;
 
         trace_amdgpu_bo_create(bo);
@@ -408,8 +408,7 @@ int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
         return 0;
 
 fail_unreserve:
-        amdgpu_bo_unreserve(bo);
-fail_free:
+        ww_mutex_unlock(&bo->tbo.resv->lock);
         amdgpu_bo_unref(&bo);
         return r;
 }