Commit 6c812bc5 authored by Thomas Zimmermann's avatar Thomas Zimmermann Committed by Gerd Hoffmann
Browse files

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: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: http://patchwork.freedesktop.org/patch/msgid/20190508082630.15116-3-tzimmermann@suse.de


Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent 85438a8d

drivers/gpu/drm/drm_gem_vram_helper.c

+50 −0
Original line number Diff line number Diff line
@@ -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);

include/drm/drm_gem_vram_helper.h

+10 −0
Original line number Diff line number Diff line
@@ -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

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