drm/amdgpu: parameterize ttm BO destroy callback

Make provision to pass different ttm BO destroy callback
while creating a amdgpu_bo.

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

Author: Nirmoy Das

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

@@ -54,29 +54,40 @@
 
 static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
 {
-	struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
 	struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
-	struct amdgpu_bo_user *ubo;
 
 	amdgpu_bo_kunmap(bo);
 
 	if (bo->tbo.base.import_attach)
 		drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
 	drm_gem_object_release(&bo->tbo.base);
+	amdgpu_bo_unref(&bo->parent);
+	kvfree(bo);
+}
+
+static void amdgpu_bo_user_destroy(struct ttm_buffer_object *tbo)
+{
+	struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
+	struct amdgpu_bo_user *ubo;
+
+	ubo = to_amdgpu_bo_user(bo);
+	kfree(ubo->metadata);
+	amdgpu_bo_destroy(tbo);
+}
+
+static void amdgpu_bo_vm_destroy(struct ttm_buffer_object *tbo)
+{
+	struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
+	struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
+
 	/* in case amdgpu_device_recover_vram got NULL of bo->parent */
 	if (!list_empty(&bo->shadow_list)) {
 		mutex_lock(&adev->shadow_list_lock);
 		list_del_init(&bo->shadow_list);
 		mutex_unlock(&adev->shadow_list_lock);
 	}
-	amdgpu_bo_unref(&bo->parent);
-
-	if (bo->tbo.type != ttm_bo_type_kernel) {
-		ubo = to_amdgpu_bo_user(bo);
-		kfree(ubo->metadata);
-	}
 
-	kvfree(bo);
+	amdgpu_bo_destroy(tbo);
 }
 
 /**
@@ -91,8 +102,11 @@ static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
  */
 bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
 {
-	if (bo->destroy == &amdgpu_bo_destroy)
+	if (bo->destroy == &amdgpu_bo_destroy ||
+	    bo->destroy == &amdgpu_bo_user_destroy ||
+	    bo->destroy == &amdgpu_bo_vm_destroy)
 		return true;
+
 	return false;
 }
 
@@ -568,9 +582,12 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
 	if (bp->type == ttm_bo_type_kernel)
 		bo->tbo.priority = 1;
 
+	if (!bp->destroy)
+		bp->destroy = &amdgpu_bo_destroy;
+
 	r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, size, bp->type,
 				 &bo->placement, page_align, &ctx,  NULL,
-				 bp->resv, &amdgpu_bo_destroy);
+				 bp->resv, bp->destroy);
 	if (unlikely(r != 0))
 		return r;
 
@@ -634,6 +651,7 @@ int amdgpu_bo_create_user(struct amdgpu_device *adev,
 	int r;
 
 	bp->bo_ptr_size = sizeof(struct amdgpu_bo_user);
+	bp->destroy = &amdgpu_bo_user_destroy;
 	r = amdgpu_bo_create(adev, bp, &bo_ptr);
 	if (r)
 		return r;
@@ -665,6 +683,7 @@ int amdgpu_bo_create_vm(struct amdgpu_device *adev,
 	 * num of amdgpu_vm_pt entries.
 	 */
 	BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
+	bp->destroy = &amdgpu_bo_vm_destroy;
 	r = amdgpu_bo_create(adev, bp, &bo_ptr);
 	if (r)
 		return r;

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

@@ -55,7 +55,8 @@ struct amdgpu_bo_param {
 	u64				flags;
 	enum ttm_bo_type		type;
 	bool				no_wait_gpu;
-	struct dma_resv	*resv;
+	struct dma_resv			*resv;
+	void				(*destroy)(struct ttm_buffer_object *bo);
 };
 
 /* bo virtual addresses in a vm */