linux-stable.git/include/drm/drm_gem.h, branch linux-6.17.y

drm/gem: Add ww_acquire_ctx support to drm_gem_lru_scan()

2025-07-04T18:09:43+00:00

If the callback is going to have to attempt to grab more locks, it is
useful to have an ww_acquire_ctx to avoid locking order problems.

Why not use the drm_exec helper instead?  Mainly because (a) where
ww_acquire_init() is called is awkward, and (b) we don't really
need to retry after backoff, we can just move on to the next object.

Signed-off-by: Rob Clark 
Signed-off-by: Rob Clark 
Tested-by: Antonino Maniscalco 
Reviewed-by: Antonino Maniscalco 
Patchwork: https://patchwork.freedesktop.org/patch/661463/

drm/gem: Inline drm_gem_pin() into PRIME helpers

2025-05-30T07:47:28+00:00

Inline drm_gem_pin() into its only caller drm_gem_map_attach()
and update the documentation in the callback's purpose. Do the
equivalent for drm_gem_unpin(). Also add stricter error checking
on the involved locking.

The pin operation in the GEM object functions is a helper for
PRIME-exported buffer objects. Having drm_gem_pin() gives the
impression of a general-purpose interface, which is not the case.
Removing it makes the pin callback a bit harder to misuse.

v2:
- clarify comment on pin callback (Dmitry)

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Dmitry Osipenko 
Link: https://lore.kernel.org/r/20250526132634.531789-5-tzimmermann@suse.de

BackMerge tag 'v6.15-rc5' into drm-next

2025-05-06T06:39:25+00:00

Linux 6.15-rc5, requested by tzimmerman for fixes required in drm-next.

Signed-off-by: Dave Airlie

drm/gem: Internally test import_attach for imported objects

2025-04-17T07:52:48+00:00

Test struct drm_gem_object.import_attach to detect imported objects.

During object clenanup, the dma_buf field might be NULL. Testing it in
an object's free callback then incorrectly does a cleanup as for native
objects. Happens for calls to drm_mode_destroy_dumb_ioctl() that
clears the dma_buf field in drm_gem_object_exported_dma_buf_free().

v3:
- only test for import_attach (Boris)
v2:
- use import_attach.dmabuf instead of dma_buf (Christian)

Signed-off-by: Thomas Zimmermann 
Fixes: b57aa47d39e9 ("drm/gem: Test for imported GEM buffers with helper")
Reported-by: Andy Yan 
Closes: https://lore.kernel.org/dri-devel/38d09d34.4354.196379aa560.Coremail.andyshrk@163.com/
Tested-by: Andy Yan 
Cc: Thomas Zimmermann 
Cc: Anusha Srivatsa 
Cc: Christian König 
Cc: Maarten Lankhorst 
Cc: Maxime Ripard 
Cc: David Airlie 
Cc: Simona Vetter 
Cc: Sumit Semwal 
Cc: "Christian König" 
Cc: dri-devel@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Reviewed-by: Boris Brezillon 
Reviewed-by: Simona Vetter 
Link: https://lore.kernel.org/r/20250416065820.26076-1-tzimmermann@suse.de

drm/gem: Document locking rule of vmap and evict callbacks

2025-03-26T20:00:06+00:00

The vmap/vunmap/evict GEM callbacks are always invoked with a held GEM's
reservation lock. Document this locking rule for clarity.

Reviewed-by: Boris Brezillon 
Reviewed-by: Christian König 
Acked-by: Thomas Zimmermann 
Signed-off-by: Dmitry Osipenko 
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-4-dmitry.osipenko@collabora.com

drm/gem: Add _locked postfix to functions that have unlocked counterpart

2025-03-26T20:00:02+00:00

Add _locked postfix to drm_gem functions that have unlocked counterpart
functions to make GEM functions naming more consistent and intuitive in
regards to the locking requirements.

Acked-by: Maxime Ripard 
Reviewed-by: Boris Brezillon 
Suggested-by: Boris Brezillon 
Reviewed-by: Christian König 
Acked-by: Thomas Zimmermann 
Signed-off-by: Dmitry Osipenko 
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-3-dmitry.osipenko@collabora.com

drm/gem: Change locked/unlocked postfix of drm_gem_v/unmap() function names

2025-03-26T19:59:56+00:00

Make drm/gem API function names consistent by having locked function
use the _locked postfix in the name, while the unlocked variants don't
use the _unlocked postfix. Rename drm_gem_v/unmap() function names to
make them consistent with the rest of the API functions.

Acked-by: Maxime Ripard 
Reviewed-by: Boris Brezillon 
Suggested-by: Boris Brezillon 
Reviewed-by: Christian König 
Acked-by: Thomas Zimmermann 
Signed-off-by: Dmitry Osipenko 
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-2-dmitry.osipenko@collabora.com

drm/gem: Test for imported GEM buffers with helper

2025-03-06T07:58:27+00:00

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 
Reviewed-by: Anusha Srivatsa 
Reviewed-by: Christian König 
Link: https://patchwork.freedesktop.org/patch/msgid/20250226172457.217725-2-tzimmermann@suse.de

drm: make drm-active- stats optional

2024-12-19T15:56:17+00:00

When memory stats is generated fresh everytime by going though all the
BOs, their active information is quite easy to get. But if the stats are
tracked with BO's state this becomes harder since the job scheduling
part doesn't really deal with individual buffers.

Make drm-active- optional to enable amdgpu to switch to the second
method.

Signed-off-by: Yunxiang Li 
Reviewed-by: Tvrtko Ursulin 
Link: https://patchwork.freedesktop.org/patch/msgid/20241219151411.1150-3-Yunxiang.Li@amd.com
Signed-off-by: Christian König

Merge drm/drm-next into drm-misc-next

2024-09-30T08:50:54+00:00

Get drm-misc-next to up v6.12-rc1.

Signed-off-by: Thomas Zimmermann