drm/ttm: replace last move_notify with delete_mem_notify

The move notify callback is only used in one place, this should
be removed in the future, but for now just rename it to the use
case which is to notify the driver that the GPU memory is to be
deleted.

Drivers can be cleaned up after this separately.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201021044031.1752624-2-airlied@gmail.com

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

@@ -1730,6 +1730,12 @@ static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
 	return ret;
 }
 
+static void
+amdgpu_bo_delete_mem_notify(struct ttm_buffer_object *bo)
+{
+	amdgpu_bo_move_notify(bo, false, NULL);
+}
+
 static struct ttm_bo_driver amdgpu_bo_driver = {
 	.ttm_tt_create = &amdgpu_ttm_tt_create,
 	.ttm_tt_populate = &amdgpu_ttm_tt_populate,
@@ -1739,7 +1745,7 @@ static struct ttm_bo_driver amdgpu_bo_driver = {
 	.evict_flags = &amdgpu_evict_flags,
 	.move = &amdgpu_bo_move,
 	.verify_access = &amdgpu_verify_access,
-	.move_notify = &amdgpu_bo_move_notify,
+	.delete_mem_notify = &amdgpu_bo_delete_mem_notify,
 	.release_notify = &amdgpu_bo_release_notify,
 	.io_mem_reserve = &amdgpu_ttm_io_mem_reserve,
 	.io_mem_pfn = amdgpu_ttm_io_mem_pfn,

drivers/gpu/drm/drm_gem_vram_helper.c

@@ -949,9 +949,7 @@ static void bo_driver_evict_flags(struct ttm_buffer_object *bo,
 	drm_gem_vram_bo_driver_evict_flags(gbo, placement);
 }
 
-static void bo_driver_move_notify(struct ttm_buffer_object *bo,
-				  bool evict,
-				  struct ttm_resource *new_mem)
+static void bo_driver_delete_mem_notify(struct ttm_buffer_object *bo)
 {
 	struct drm_gem_vram_object *gbo;
 
@@ -961,7 +959,7 @@ static void bo_driver_move_notify(struct ttm_buffer_object *bo,
 
 	gbo = drm_gem_vram_of_bo(bo);
 
-	drm_gem_vram_bo_driver_move_notify(gbo, evict, new_mem);
+	drm_gem_vram_bo_driver_move_notify(gbo, false, NULL);
 }
 
 static int bo_driver_move(struct ttm_buffer_object *bo,
@@ -1002,7 +1000,7 @@ static struct ttm_bo_driver bo_driver = {
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = bo_driver_evict_flags,
 	.move = bo_driver_move,
-	.move_notify = bo_driver_move_notify,
+	.delete_mem_notify = bo_driver_delete_mem_notify,
 	.io_mem_reserve = bo_driver_io_mem_reserve,
 };
 

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -1401,6 +1401,12 @@ nouveau_bo_fence(struct nouveau_bo *nvbo, struct nouveau_fence *fence, bool excl
 		dma_resv_add_shared_fence(resv, &fence->base);
 }
 
+static void
+nouveau_bo_delete_mem_notify(struct ttm_buffer_object *bo)
+{
+	nouveau_bo_move_ntfy(bo, false, NULL);
+}
+
 struct ttm_bo_driver nouveau_bo_driver = {
 	.ttm_tt_create = &nouveau_ttm_tt_create,
 	.ttm_tt_populate = &nouveau_ttm_tt_populate,
@@ -1408,7 +1414,7 @@ struct ttm_bo_driver nouveau_bo_driver = {
 	.ttm_tt_destroy = &nouveau_ttm_tt_destroy,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = nouveau_bo_evict_flags,
-	.move_notify = nouveau_bo_move_ntfy,
+	.delete_mem_notify = nouveau_bo_delete_mem_notify,
 	.move = nouveau_bo_move,
 	.verify_access = nouveau_bo_verify_access,
 	.io_mem_reserve = &nouveau_ttm_io_mem_reserve,

drivers/gpu/drm/qxl/qxl_ttm.c

@@ -166,6 +166,11 @@ out:
 	return ret;
 }
 
+static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
+{
+	qxl_bo_move_notify(bo, false, NULL);
+}
+
 static struct ttm_bo_driver qxl_bo_driver = {
 	.ttm_tt_create = &qxl_ttm_tt_create,
 	.ttm_tt_destroy = &qxl_ttm_backend_destroy,
@@ -173,7 +178,7 @@ static struct ttm_bo_driver qxl_bo_driver = {
 	.evict_flags = &qxl_evict_flags,
 	.move = &qxl_bo_move,
 	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
-	.move_notify = &qxl_bo_move_notify,
+	.delete_mem_notify = &qxl_bo_delete_mem_notify,
 };
 
 static int qxl_ttm_init_mem_type(struct qxl_device *qdev,

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -824,6 +824,12 @@ bool radeon_ttm_tt_is_readonly(struct radeon_device *rdev,
 	return !!(gtt->userflags & RADEON_GEM_USERPTR_READONLY);
 }
 
+static void
+radeon_bo_delete_mem_notify(struct ttm_buffer_object *bo)
+{
+	radeon_bo_move_notify(bo, false, NULL);
+}
+
 static struct ttm_bo_driver radeon_bo_driver = {
 	.ttm_tt_create = &radeon_ttm_tt_create,
 	.ttm_tt_populate = &radeon_ttm_tt_populate,
@@ -833,7 +839,7 @@ static struct ttm_bo_driver radeon_bo_driver = {
 	.evict_flags = &radeon_evict_flags,
 	.move = &radeon_bo_move,
 	.verify_access = &radeon_verify_access,
-	.move_notify = &radeon_bo_move_notify,
+	.delete_mem_notify = &radeon_bo_delete_mem_notify,
 	.io_mem_reserve = &radeon_ttm_io_mem_reserve,
 };
 

drivers/gpu/drm/ttm/ttm_bo.c

@@ -284,8 +284,8 @@ out_err:
 
 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
 {
-	if (bo->bdev->driver->move_notify)
-		bo->bdev->driver->move_notify(bo, false, NULL);
+	if (bo->bdev->driver->delete_mem_notify)
+		bo->bdev->driver->delete_mem_notify(bo);
 
 	ttm_bo_tt_destroy(bo);
 	ttm_resource_free(bo, &bo->mem);

drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c

@@ -771,6 +771,12 @@ fail:
 	return ret;
 }
 
+static void
+vmw_delete_mem_notify(struct ttm_buffer_object *bo)
+{
+	vmw_move_notify(bo, false, NULL);
+}
+
 struct ttm_bo_driver vmw_bo_driver = {
 	.ttm_tt_create = &vmw_ttm_tt_create,
 	.ttm_tt_populate = &vmw_ttm_populate,
@@ -780,7 +786,7 @@ struct ttm_bo_driver vmw_bo_driver = {
 	.evict_flags = vmw_evict_flags,
 	.move = vmw_move,
 	.verify_access = vmw_verify_access,
-	.move_notify = vmw_move_notify,
+	.delete_mem_notify = vmw_delete_mem_notify,
 	.swap_notify = vmw_swap_notify,
 	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
 };

include/drm/ttm/ttm_bo_driver.h

@@ -156,15 +156,9 @@ struct ttm_bo_driver {
 			     struct file *filp);
 
 	/**
-	 * Hook to notify driver about a driver move so it
-	 * can do tiling things and book-keeping.
-	 *
-	 * @evict: whether this move is evicting the buffer from the graphics
-	 * address space
+	 * Hook to notify driver about a resource delete.
 	 */
-	void (*move_notify)(struct ttm_buffer_object *bo,
-			    bool evict,
-			    struct ttm_resource *new_mem);
+	void (*delete_mem_notify)(struct ttm_buffer_object *bo);
 
 	/**
 	 * notify the driver that we're about to swap out this bo