diff options
| author | Faith Ekstrand <faith.ekstrand@collabora.com> | 2025-12-08 13:08:39 +0300 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@collabora.com> | 2025-12-09 15:09:37 +0300 |
| commit | 62eedf1ccba534b318ca85d3890bf0951b9e0f87 (patch) | |
| tree | a3be8fcbe386d03a97662bcf18e3aa6ee6b007d0 /include/uapi | |
| parent | d17592e61fa8e3b2d58df7c4a24abc8ac58b8d3f (diff) | |
| download | linux-62eedf1ccba534b318ca85d3890bf0951b9e0f87.tar.xz | |
drm/panfrost: Add flag to map GEM object Write-Back Cacheable
Will be used by the UMD to optimize CPU accesses to buffers
that are frequently read by the CPU, or on which the access
pattern makes non-cacheable mappings inefficient.
Mapping buffers CPU-cached implies taking care of the CPU
cache maintenance in the UMD, unless the GPU is IO coherent.
v2:
- Add more to the commit message
v3:
- No changes
v4:
- Fix the map_wc test in panfrost_ioctl_query_bo_info()
v5:
- Drop Steve's R-b (enough has changed to justify a new review)
v6:
- Collect R-b
v7:
- No changes
v8:
- Fix double drm_gem_object_funcs::export assignment
Signed-off-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patch.msgid.link/20251208100841.730527-13-boris.brezillon@collabora.com
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/drm/panfrost_drm.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/uapi/drm/panfrost_drm.h b/include/uapi/drm/panfrost_drm.h index 36ae48ea50d3..50d5337f35ef 100644 --- a/include/uapi/drm/panfrost_drm.h +++ b/include/uapi/drm/panfrost_drm.h @@ -124,9 +124,12 @@ struct drm_panfrost_wait_bo { __s64 timeout_ns; }; -/* Valid flags to pass to drm_panfrost_create_bo */ +/* Valid flags to pass to drm_panfrost_create_bo. + * PANFROST_BO_WB_MMAP can't be set if PANFROST_BO_HEAP is. + */ #define PANFROST_BO_NOEXEC 1 #define PANFROST_BO_HEAP 2 +#define PANFROST_BO_WB_MMAP 4 /** * struct drm_panfrost_create_bo - ioctl argument for creating Panfrost BOs. |