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| author | Rob Clark <robdclark@chromium.org> | 2023-11-06 21:50:26 +0300 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2023-11-21 05:33:17 +0300 |
| commit | 9902cb999e4e913d98e8afe4b36c08e4a793e1ce (patch) | |
| tree | ac483307cac18761cc46f76cbbe32a8b327dac71 /drivers/gpu/drm/msm/msm_gem.h | |
| parent | d1912f6972b857e63577e8094f5f1242d9fe3c7d (diff) | |
| download | linux-9902cb999e4e913d98e8afe4b36c08e4a793e1ce.tar.xz | |
drm/msm/gem: Add metadata
The EXT_external_objects extension is a bit awkward as it doesn't pass
explicit modifiers, leaving the importer to guess with incomplete
information. In the case of vk (turnip) exporting and gl (freedreno)
importing, the "OPTIMAL_TILING_EXT" layout depends on VkImageCreateInfo
flags (among other things), which the importer does not know. Which
unfortunately leaves us with the need for a metadata back-channel.
The contents of the metadata are defined by userspace. The
EXT_external_objects extension is only required to work between
compatible versions of gl and vk drivers, as defined by device and
driver UUIDs.
v2: add missing metadata kfree
v3: Rework to move copy_from/to_user out from under gem obj lock
to avoid angering lockdep about deadlocks against fs-reclaim
Signed-off-by: Rob Clark <robdclark@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/566157/
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem.h')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h index 8ddef5443140..6352bd3cc5ed 100644 --- a/drivers/gpu/drm/msm/msm_gem.h +++ b/drivers/gpu/drm/msm/msm_gem.h @@ -108,6 +108,10 @@ struct msm_gem_object { char name[32]; /* Identifier to print for the debugfs files */ + /* userspace metadata backchannel */ + void *metadata; + u32 metadata_size; + /** * pin_count: Number of times the pages are pinned * |