drm/ttm: remove the init_mem_type callback

It is a very strange concept to call a function which just
calls back the caller for the functions parameters.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/382085/

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

@@ -62,12 +62,6 @@
 
 #define AMDGPU_TTM_VRAM_MAX_DW_READ	(size_t)128
 
-static int amdgpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
-				struct ttm_mem_type_manager *man)
-{
-	return 0;
-}
-
 static int amdgpu_ttm_init_vram(struct amdgpu_device *adev)
 {
 
@@ -1727,7 +1721,6 @@ static struct ttm_bo_driver amdgpu_bo_driver = {
 	.ttm_tt_create = &amdgpu_ttm_tt_create,
 	.ttm_tt_populate = &amdgpu_ttm_tt_populate,
 	.ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
-	.init_mem_type = &amdgpu_init_mem_type,
 	.eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
 	.evict_flags = &amdgpu_evict_flags,
 	.move = &amdgpu_bo_move,

drivers/gpu/drm/drm_gem_vram_helper.c

@@ -1004,12 +1004,6 @@ static struct ttm_tt *bo_driver_ttm_tt_create(struct ttm_buffer_object *bo,
 	return NULL;
 }
 
-static int bo_driver_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
-				   struct ttm_mem_type_manager *man)
-{
-	return 0;
-}
-
 static void bo_driver_evict_flags(struct ttm_buffer_object *bo,
 				  struct ttm_placement *placement)
 {
@@ -1069,7 +1063,6 @@ static struct ttm_bo_driver bo_driver = {
 	.ttm_tt_create = bo_driver_ttm_tt_create,
 	.ttm_tt_populate = ttm_pool_populate,
 	.ttm_tt_unpopulate = ttm_pool_unpopulate,
-	.init_mem_type = bo_driver_init_mem_type,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = bo_driver_evict_flags,
 	.move_notify = bo_driver_move_notify,

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -646,13 +646,6 @@ nouveau_ttm_tt_create(struct ttm_buffer_object *bo, uint32_t page_flags)
 	return nouveau_sgdma_create_ttm(bo, page_flags);
 }
 
-static int
-nouveau_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
-			 struct ttm_mem_type_manager *man)
-{
-	return 0;
-}
-
 static void
 nouveau_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
 {
@@ -1643,7 +1636,6 @@ struct ttm_bo_driver nouveau_bo_driver = {
 	.ttm_tt_create = &nouveau_ttm_tt_create,
 	.ttm_tt_populate = &nouveau_ttm_tt_populate,
 	.ttm_tt_unpopulate = &nouveau_ttm_tt_unpopulate,
-	.init_mem_type = nouveau_bo_init_mem_type,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = nouveau_bo_evict_flags,
 	.move_notify = nouveau_bo_move_ntfy,

drivers/gpu/drm/qxl/qxl_ttm.c

@@ -48,12 +48,6 @@ static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
 	return qdev;
 }
 
-static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
-			     struct ttm_mem_type_manager *man)
-{
-	return 0;
-}
-
 static void qxl_evict_flags(struct ttm_buffer_object *bo,
 				struct ttm_placement *placement)
 {
@@ -215,7 +209,6 @@ static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 
 static struct ttm_bo_driver qxl_bo_driver = {
 	.ttm_tt_create = &qxl_ttm_tt_create,
-	.init_mem_type = &qxl_init_mem_type,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = &qxl_evict_flags,
 	.move = &qxl_bo_move,

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -66,12 +66,6 @@ struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
 	return rdev;
 }
 
-static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
-				struct ttm_mem_type_manager *man)
-{
-	return 0;
-}
-
 static int radeon_ttm_init_vram(struct radeon_device *rdev)
 {
 	struct ttm_mem_type_manager *man = &rdev->mman.bdev.man[TTM_PL_VRAM];
@@ -753,7 +747,6 @@ static struct ttm_bo_driver radeon_bo_driver = {
 	.ttm_tt_create = &radeon_ttm_tt_create,
 	.ttm_tt_populate = &radeon_ttm_tt_populate,
 	.ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
-	.init_mem_type = &radeon_init_mem_type,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = &radeon_evict_flags,
 	.move = &radeon_bo_move,

drivers/gpu/drm/ttm/ttm_bo.c

@@ -1524,10 +1524,6 @@ int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
 	mutex_init(&man->io_reserve_mutex);
 	spin_lock_init(&man->move_lock);
 	INIT_LIST_HEAD(&man->io_reserve_lru);
-
-	ret = bdev->driver->init_mem_type(bdev, type, man);
-	if (ret)
-		return ret;
 	man->bdev = bdev;
 
 	if (type != TTM_PL_SYSTEM) {

drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c

@@ -736,12 +736,6 @@ static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
 	return NULL;
 }
 
-static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
-		      struct ttm_mem_type_manager *man)
-{
-	return 0;
-}
-
 static void vmw_evict_flags(struct ttm_buffer_object *bo,
 		     struct ttm_placement *placement)
 {
@@ -817,7 +811,6 @@ struct ttm_bo_driver vmw_bo_driver = {
 	.ttm_tt_create = &vmw_ttm_tt_create,
 	.ttm_tt_populate = &vmw_ttm_populate,
 	.ttm_tt_unpopulate = &vmw_ttm_unpopulate,
-	.init_mem_type = vmw_init_mem_type,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = vmw_evict_flags,
 	.move = NULL,

include/drm/ttm/ttm_bo_driver.h

@@ -157,7 +157,6 @@ struct ttm_mem_type_manager_func {
  * @move: The fence of the last pipelined move operation.
  *
  * This structure is used to identify and manage memory types for a device.
- * It's set up by the ttm_bo_driver::init_mem_type method.
  */
 
 
@@ -203,8 +202,6 @@ struct ttm_mem_type_manager {
  * struct ttm_bo_driver
  *
  * @create_ttm_backend_entry: Callback to create a struct ttm_backend.
- * @init_mem_type: Callback to initialize a struct ttm_mem_type_manager
- * structure.
  * @evict_flags: Callback to obtain placement flags when a buffer is evicted.
  * @move: Callback for a driver to hook in accelerated functions to
  * move a buffer.
@@ -247,9 +244,6 @@ struct ttm_bo_driver {
 	 */
 	void (*ttm_tt_unpopulate)(struct ttm_tt *ttm);
 
-	int (*init_mem_type)(struct ttm_bo_device *bdev, uint32_t type,
-			     struct ttm_mem_type_manager *man);
-
 	/**
 	 * struct ttm_bo_driver member eviction_valuable
 	 *