Commit 10028c5a authored by Eric Anholt's avatar Eric Anholt
Browse files

drm: Create a driver hook for allocating GEM object structs. 



The CMA helpers had no way for a driver to extend the struct with its
own fields.  Since the CMA helpers are mostly "Allocate a
drm_gem_cma_object, then fill in a few fields", it's hard to write as
pure helpers without passing in a driver callback for the allocate
step.

Signed-off-by: default avatarEric Anholt <eric@anholt.net>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 8005c49d

drivers/gpu/drm/drm_gem_cma_helper.c

+6 −4
Original line number Diff line number Diff line
@@ -59,11 +59,13 @@ __drm_gem_cma_create(struct drm_device *drm, size_t size) 
	struct drm_gem_object *gem_obj;

	int ret;



	cma_obj = kzalloc(sizeof(*cma_obj), GFP_KERNEL);

	if (!cma_obj)

	if (drm->driver->gem_create_object)

		gem_obj = drm->driver->gem_create_object(drm, size);

	else

		gem_obj = kzalloc(sizeof(*cma_obj), GFP_KERNEL);

	if (!gem_obj)

		return ERR_PTR(-ENOMEM);



	gem_obj = &cma_obj->base;

	cma_obj = container_of(gem_obj, struct drm_gem_cma_object, base);



	ret = drm_gem_object_init(drm, gem_obj, size);

	if (ret)

include/drm/drmP.h

+7 −0
Original line number Diff line number Diff line
@@ -580,6 +580,13 @@ struct drm_driver { 
	int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);

	void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);



	/**

	 * Hook for allocating the GEM object struct, for use by core

	 * helpers.

	 */

	struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,

						    size_t size);



	/* prime: */

	/* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */

	int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,

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