diff options
| author | Rob Clark <robdclark@chromium.org> | 2025-06-29 13:13:07 -0700 |
|---|---|---|
| committer | Rob Clark <robin.clark@oss.qualcomm.com> | 2025-07-04 17:48:36 -0700 |
| commit | b58e12a66e47eaf95b31bbefbc260e5a0b3e638c (patch) | |
| tree | 74c77508ffa87706f2e15b388a884113e4a352a3 /drivers/gpu/drm/msm/msm_gem_prime.c | |
| parent | 6a4d287a1ae6e49f8ef57fcb2a512c2b0bbef966 (diff) | |
drm/msm: Add _NO_SHARE flag
Buffers that are not shared between contexts can share a single resv
object. This way drm_gpuvm will not track them as external objects, and
submit-time validating overhead will be O(1) for all N non-shared BOs,
instead of O(n).
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Tested-by: Antonino Maniscalco <antomani103@gmail.com>
Reviewed-by: Antonino Maniscalco <antomani103@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/661497/
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem_prime.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem_prime.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c index 2e37913d5a6a..4d93f2daeeaa 100644 --- a/drivers/gpu/drm/msm/msm_gem_prime.c +++ b/drivers/gpu/drm/msm/msm_gem_prime.c @@ -16,6 +16,9 @@ struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj) struct msm_gem_object *msm_obj = to_msm_bo(obj); int npages = obj->size >> PAGE_SHIFT; + if (msm_obj->flags & MSM_BO_NO_SHARE) + return ERR_PTR(-EINVAL); + if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */ return ERR_PTR(-ENOMEM); @@ -45,6 +48,15 @@ struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev, return msm_gem_import(dev, attach->dmabuf, sg); } + +struct dma_buf *msm_gem_prime_export(struct drm_gem_object *obj, int flags) +{ + if (to_msm_bo(obj)->flags & MSM_BO_NO_SHARE) + return ERR_PTR(-EPERM); + + return drm_gem_prime_export(obj, flags); +} + int msm_gem_prime_pin(struct drm_gem_object *obj) { struct page **pages; @@ -53,6 +65,9 @@ int msm_gem_prime_pin(struct drm_gem_object *obj) if (drm_gem_is_imported(obj)) return 0; + if (to_msm_bo(obj)->flags & MSM_BO_NO_SHARE) + return -EINVAL; + pages = msm_gem_pin_pages_locked(obj); if (IS_ERR(pages)) ret = PTR_ERR(pages); |