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drm: Add |struct drm_gem_vram_object| callbacks for |struct ttm_bo_driver| 

The provided helpers can be used for the respective callback functions
in |struct ttm_bo_driver|.

v2:
	* drm_is_gem_vram() is now a private function
	* documentation fixes

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: http://patchwork.freedesktop.org/patch/msgid/20190508082630.15116-3-tzimmermann@suse.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Thomas Zimmermann 2019-05-08 10:26:12 +02:00 committed by Gerd Hoffmann
parent 85438a8ddf
commit 6c812bc507
2 changed files with 60 additions and 0 deletions
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50
drivers/gpu/drm/drm_gem_vram_helper.c
View File

@ -410,3 +410,53 @@ void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo)
drm_gem_vram_kunmap_at(gbo, &gbo->kmap);
}
EXPORT_SYMBOL(drm_gem_vram_kunmap);
/*
* Helpers for struct ttm_bo_driver
*/
static bool drm_is_gem_vram(struct ttm_buffer_object *bo)
{
return (bo->destroy == ttm_buffer_object_destroy);
}
/**
* drm_gem_vram_bo_driver_evict_flags() - \
Implements &struct ttm_bo_driver.evict_flags
* @bo: TTM buffer object. Refers to &struct drm_gem_vram_object.bo
* @pl: TTM placement information.
*/
void drm_gem_vram_bo_driver_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *pl)
{
struct drm_gem_vram_object *gbo;
/* TTM may pass BOs that are not GEM VRAM BOs. */
if (!drm_is_gem_vram(bo))
return;
gbo = drm_gem_vram_of_bo(bo);
drm_gem_vram_placement(gbo, TTM_PL_FLAG_SYSTEM);
*pl = gbo->placement;
}
EXPORT_SYMBOL(drm_gem_vram_bo_driver_evict_flags);
/**
* drm_gem_vram_bo_driver_verify_access() - \
Implements &struct ttm_bo_driver.verify_access
* @bo: TTM buffer object. Refers to &struct drm_gem_vram_object.bo
* @filp: File pointer.
*
* Returns:
* 0 on success, or
* a negative errno code otherwise.
*/
int drm_gem_vram_bo_driver_verify_access(struct ttm_buffer_object *bo,
struct file *filp)
{
struct drm_gem_vram_object *gbo = drm_gem_vram_of_bo(bo);
return drm_vma_node_verify_access(&gbo->gem.vma_node,
filp->private_data);
}
EXPORT_SYMBOL(drm_gem_vram_bo_driver_verify_access);

10
include/drm/drm_gem_vram_helper.h
View File

@ -89,4 +89,14 @@ void drm_gem_vram_kunmap_at(struct drm_gem_vram_object *gbo,
struct ttm_bo_kmap_obj *kmap);
void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo);
/*
* Helpers for struct ttm_bo_driver
*/
void drm_gem_vram_bo_driver_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *pl);
int drm_gem_vram_bo_driver_verify_access(struct ttm_buffer_object *bo,
struct file *filp);
#endif