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author | Thomas Zimmermann <tzimmermann@suse.de> | 2019-05-08 10:26:12 +0200 |
---|---|---|
committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-05-15 16:17:05 +0200 |
commit | 6c812bc5074bbc969e78fadfbba7ac41fe61ddeb (patch) | |
tree | ac2d9c1a6905209d1984e2a63060f920a1ecc3c6 /drivers/gpu/drm/drm_gem_vram_helper.c | |
parent | 85438a8ddf031f416758ecf8c080ff92075acb01 (diff) | |
download | linux-6c812bc5074bbc969e78fadfbba7ac41fe61ddeb.tar.gz linux-6c812bc5074bbc969e78fadfbba7ac41fe61ddeb.tar.bz2 linux-6c812bc5074bbc969e78fadfbba7ac41fe61ddeb.zip |
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>
Diffstat (limited to 'drivers/gpu/drm/drm_gem_vram_helper.c')
-rw-r--r-- | drivers/gpu/drm/drm_gem_vram_helper.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c index 761a546412f8..d6c4e0d0a1c5 100644 --- a/drivers/gpu/drm/drm_gem_vram_helper.c +++ b/drivers/gpu/drm/drm_gem_vram_helper.c @@ -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); |