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

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
......@@ -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)
......
......@@ -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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