Commit 231927d9 authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

drm/ttm: add drm_gem_ttm_mmap() 



Add helper function to mmap ttm bo's using &drm_gem_object_funcs.mmap().

Note that with this code path access verification is done by
drm_gem_mmap() (which calls drm_vma_node_is_allowed(()).
The &ttm_bo_driver.verify_access() callback is is not used.

v3: use ttm_bo_mmap_obj instead of ttm_bo_mmap_vma_setup

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20191016115203.20095-9-kraxel@redhat.com
parent 12067e0e

drivers/gpu/drm/drm_gem_ttm_helper.c

+17 −0
Original line number Original line Diff line number Diff line
@@ -52,5 +52,22 @@ void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent, 
}

}

EXPORT_SYMBOL(drm_gem_ttm_print_info);

EXPORT_SYMBOL(drm_gem_ttm_print_info);





/**

 * drm_gem_ttm_mmap() - mmap &ttm_buffer_object

 * @gem: GEM object.

 * @vma: vm area.

 *

 * This function can be used as &drm_gem_object_funcs.mmap

 * callback.

 */

int drm_gem_ttm_mmap(struct drm_gem_object *gem,

		     struct vm_area_struct *vma)

{

	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);



	return ttm_bo_mmap_obj(vma, bo);

}

EXPORT_SYMBOL(drm_gem_ttm_mmap);



MODULE_DESCRIPTION("DRM gem ttm helpers");

MODULE_DESCRIPTION("DRM gem ttm helpers");

MODULE_LICENSE("GPL");
 
MODULE_LICENSE("GPL");

include/drm/drm_gem_ttm_helper.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -15,5 +15,7 @@ 




void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,

void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,

			    const struct drm_gem_object *gem);

			    const struct drm_gem_object *gem);

int drm_gem_ttm_mmap(struct drm_gem_object *gem,

		     struct vm_area_struct *vma);





#endif
 
#endif

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