diff options
| author | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2025-03-23 00:26:07 +0300 |
|---|---|---|
| committer | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2025-03-26 23:00:21 +0300 |
| commit | 0271cc484f3f73d5c6f88d3e43a5d98e07c76381 (patch) | |
| tree | 337e246f8f5b37cb5ffa0eaf3567ad86d80e5307 | |
| parent | 051b6646d36dc974c3884d75021bf282925b171c (diff) | |
drm/shmem-helper: Switch drm_gem_shmem_vmap/vunmap to use pin/unpin
The vmapped pages shall be pinned in memory and previously get/put_pages()
were implicitly hard-pinning/unpinning the pages. This will no longer be
the case with addition of memory shrinker because pages_use_count > 0 won't
determine anymore whether pages are hard-pinned (they will be soft-pinned),
while the new pages_pin_count will do the hard-pinning. Switch the
vmap/vunmap() to use pin/unpin() functions in a preparation of addition
of the memory shrinker support to drm-shmem.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-10-dmitry.osipenko@collabora.com
| -rw-r--r-- | drivers/gpu/drm/drm_gem_shmem_helper.c | 6 | ||||
| -rw-r--r-- | include/drm/drm_gem_shmem_helper.h | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 6fb96e790abd..84a196bbe44f 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -360,7 +360,7 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, return 0; } - ret = drm_gem_shmem_get_pages_locked(shmem); + ret = drm_gem_shmem_pin_locked(shmem); if (ret) goto err_zero_use; @@ -383,7 +383,7 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, err_put_pages: if (!drm_gem_is_imported(obj)) - drm_gem_shmem_put_pages_locked(shmem); + drm_gem_shmem_unpin_locked(shmem); err_zero_use: shmem->vmap_use_count = 0; @@ -420,7 +420,7 @@ void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, return; vunmap(shmem->vaddr); - drm_gem_shmem_put_pages_locked(shmem); + drm_gem_shmem_unpin_locked(shmem); } shmem->vaddr = NULL; diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index 3a4be433d5f0..8b9bba87ae63 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -130,7 +130,7 @@ int drm_gem_shmem_madvise_locked(struct drm_gem_shmem_object *shmem, int madv); static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem) { return (shmem->madv > 0) && - !shmem->vmap_use_count && shmem->sgt && + !refcount_read(&shmem->pages_pin_count) && shmem->sgt && !shmem->base.dma_buf && !drm_gem_is_imported(&shmem->base); } |