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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2021-11-29 12:48:41 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2021-11-30 11:41:28 +0300 |
| commit | a21800bced7cbaf7bb8f5281db17a5d7ef6e197a (patch) | |
| tree | b71a940ac6f0db01084d74f22a17f1ddf5418975 /drivers/gpu/drm/drm_legacy.h | |
| parent | 2985c96485b7ef4e015d13dc3081fb0479260951 (diff) | |
| download | linux-a21800bced7cbaf7bb8f5281db17a5d7ef6e197a.tar.xz | |
drm: Declare hashtable as legacy
The DRM hashtable code is only used by internal functions for legacy
UMS drivers. Move the implementation behind CONFIG_DRM_LEGACY and the
declarations into legacy header files. Unexport the symbols.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211129094841.22499-4-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/drm_legacy.h')
| -rw-r--r-- | drivers/gpu/drm/drm_legacy.h | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_legacy.h b/drivers/gpu/drm/drm_legacy.h index c9206840c87f..70c9dba114a6 100644 --- a/drivers/gpu/drm/drm_legacy.h +++ b/drivers/gpu/drm/drm_legacy.h @@ -35,9 +35,47 @@ #include <drm/drm_legacy.h> struct agp_memory; +struct drm_buf_desc; struct drm_device; struct drm_file; -struct drm_buf_desc; +struct drm_hash_item; +struct drm_open_hash; + +/* + * Hash-table Support + */ + +#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member) + +/* drm_hashtab.c */ +#if IS_ENABLED(CONFIG_DRM_LEGACY) +int drm_ht_create(struct drm_open_hash *ht, unsigned int order); +int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item); +int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item, + unsigned long seed, int bits, int shift, + unsigned long add); +int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item); + +void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key); +int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key); +int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item); +void drm_ht_remove(struct drm_open_hash *ht); +#endif + +/* + * RCU-safe interface + * + * The user of this API needs to make sure that two or more instances of the + * hash table manipulation functions are never run simultaneously. + * The lookup function drm_ht_find_item_rcu may, however, run simultaneously + * with any of the manipulation functions as long as it's called from within + * an RCU read-locked section. + */ +#define drm_ht_insert_item_rcu drm_ht_insert_item +#define drm_ht_just_insert_please_rcu drm_ht_just_insert_please +#define drm_ht_remove_key_rcu drm_ht_remove_key +#define drm_ht_remove_item_rcu drm_ht_remove_item +#define drm_ht_find_item_rcu drm_ht_find_item /* * Generic DRM Contexts |