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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2020-06-09 12:08:19 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-06-10 11:16:43 +0300 |
| commit | d18ee06b4889bf7da412069ef60baeaaca3ac6f4 (patch) | |
| tree | 0a8b690ca1695f40320f8349b344214aa993f59c /drivers/gpu/drm/drm_gem_shmem_helper.c | |
| parent | ad0f449bebc79b01583c711684fefcdc9620320a (diff) | |
| download | linux-d18ee06b4889bf7da412069ef60baeaaca3ac6f4.tar.xz | |
drm/shmem-helper: Add .gem_create_object helper that sets map_cached flag
The helper drm_gem_shmem_create_object_cached() allocates an GEM SHMEM
object and sets the map_cached flag. Useful for drivers that want cached
mappings.
v3:
* style fixes
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200609090820.20256-2-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/drm_gem_shmem_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_gem_shmem_helper.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index f750063968ef..0a7e3b664bc2 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -461,6 +461,33 @@ bool drm_gem_shmem_purge(struct drm_gem_object *obj) EXPORT_SYMBOL(drm_gem_shmem_purge); /** + * drm_gem_shmem_create_object_cached - Create a shmem buffer object with + * cached mappings + * @dev: DRM device + * @size: Size of the object to allocate + * + * By default, shmem buffer objects use writecombine mappings. This + * function implements struct drm_driver.gem_create_object for shmem + * buffer objects with cached mappings. + * + * Returns: + * A struct drm_gem_shmem_object * on success or NULL negative on failure. + */ +struct drm_gem_object * +drm_gem_shmem_create_object_cached(struct drm_device *dev, size_t size) +{ + struct drm_gem_shmem_object *shmem; + + shmem = kzalloc(sizeof(*shmem), GFP_KERNEL); + if (!shmem) + return NULL; + shmem->map_cached = true; + + return &shmem->base; +} +EXPORT_SYMBOL(drm_gem_shmem_create_object_cached); + +/** * drm_gem_shmem_dumb_create - Create a dumb shmem buffer object * @file: DRM file structure to create the dumb buffer for * @dev: DRM device |