diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2025-02-26 20:03:04 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2025-03-06 10:58:27 +0300 |
| commit | b57aa47d39e94dc47403a745e2024664e544078c (patch) | |
| tree | 1ab0ea8b2ce949546a40229f878ebe97e35bd114 /include/drm/drm_gem.h | |
| parent | ced7486468ac3b38d59a69fca5d97998499c936b (diff) | |
| download | linux-b57aa47d39e94dc47403a745e2024664e544078c.tar.xz | |
drm/gem: Test for imported GEM buffers with helper
Add drm_gem_is_imported() that tests if a GEM object's buffer has
been imported. Update the GEM code accordingly.
GEM code usually tests for imports if import_attach has been set
in struct drm_gem_object. But attaching a dma-buf on import requires
a DMA-capable importer device, which is not the case for many serial
busses like USB or I2C. The new helper tests if a GEM object's dma-buf
has been created from the GEM object.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Anusha Srivatsa <asrivats@redhat.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250226172457.217725-2-tzimmermann@suse.de
Diffstat (limited to 'include/drm/drm_gem.h')
| -rw-r--r-- | include/drm/drm_gem.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index fdae947682cd..2bf893eabb4b 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -35,6 +35,7 @@ */ #include <linux/kref.h> +#include <linux/dma-buf.h> #include <linux/dma-resv.h> #include <linux/list.h> #include <linux/mutex.h> @@ -575,6 +576,19 @@ static inline bool drm_gem_object_is_shared_for_memory_stats(struct drm_gem_obje return (obj->handle_count > 1) || obj->dma_buf; } +/** + * drm_gem_is_imported() - Tests if GEM object's buffer has been imported + * @obj: the GEM object + * + * Returns: + * True if the GEM object's buffer has been imported, false otherwise + */ +static inline bool drm_gem_is_imported(const struct drm_gem_object *obj) +{ + /* The dma-buf's priv field points to the original GEM object. */ + return obj->dma_buf && (obj->dma_buf->priv != obj); +} + #ifdef CONFIG_LOCKDEP /** * drm_gem_gpuva_set_lock() - Set the lock protecting accesses to the gpuva list. |