/**
* drm_gem_free_mmap_offset - release a fake mmap offset for an object
* @obj: obj in question
*
* This routine frees fake offsets allocated by drm_gem_create_mmap_offset().
*/
void
drm_gem_free_mmap_offset(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;
struct drm_gem_mm *mm = dev->mm_private;
struct drm_map_list *list = &obj->map_list;
drm_ht_remove_item(&mm->offset_hash, &list->hash);
drm_mm_put_block(list->file_offset_node);
kfree(list->map);
list->map = NULL;
}
void drm_gem_object_release_wrap(struct drm_gem_object *obj)
{
/* Remove the list map if one is present */
if (obj->map_list.map) {
struct drm_gem_mm *mm = obj->dev->mm_private;
struct drm_map_list *list = &obj->map_list;
drm_ht_remove_item(&mm->offset_hash, &list->hash);
drm_mm_put_block(list->file_offset_node);
kfree(list->map);
list->map = NULL;
}
drm_gem_object_release(obj);
}
static void ttm_release_base(struct kref *kref)
{
struct ttm_base_object *base =
container_of(kref, struct ttm_base_object, refcount);
struct ttm_object_device *tdev = base->tfile->tdev;
(void)drm_ht_remove_item(&tdev->object_hash, &base->hash);
write_unlock(&tdev->object_lock);
if (base->refcount_release) {
ttm_object_file_unref(&base->tfile);
base->refcount_release(&base);
}
write_lock(&tdev->object_lock);
}
void
drm_gem_free_mmap_offset(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;
struct drm_gem_mm *mm = dev->mm_private;
struct drm_hash_item *list = &obj->map_list;
if (!obj->on_map)
return;
drm_ht_remove_item(&mm->offset_hash, list);
free_unr(mm->idxunr, list->key);
obj->on_map = false;
}
static void ttm_release_base(struct ttm_base_object *base)
{
struct ttm_object_device *tdev = base->tfile->tdev;
(void)drm_ht_remove_item(&tdev->object_hash, &base->hash);
rw_wunlock(&tdev->object_lock);
/*
* Note: We don't use synchronize_rcu() here because it's far
* too slow. It's up to the user to free the object using
* call_rcu() or ttm_base_object_kfree().
*/
if (base->refcount_release) {
ttm_object_file_unref(&base->tfile);
base->refcount_release(&base);
}
rw_wlock(&tdev->object_lock);
}
/**
* Removes the given magic number from the hash table of used magic number
* lists.
*/
static int drm_remove_magic(struct drm_device *dev, drm_magic_t magic)
{
drm_magic_entry_t *pt;
struct drm_hash_item *hash;
DRM_DEBUG("%d\n", magic);
mutex_lock(&dev->struct_mutex);
if (drm_ht_find_item(&dev->magiclist, (unsigned long)magic, &hash)) {
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
pt = drm_hash_entry(hash, drm_magic_entry_t, hash_item);
drm_ht_remove_item(&dev->magiclist, hash);
list_del(&pt->head);
mutex_unlock(&dev->struct_mutex);
kfree(pt);
return 0;
}
int ttm_base_object_init(struct ttm_object_file *tfile,
struct ttm_base_object *base,
bool shareable,
enum ttm_object_type object_type,
void (*rcount_release) (struct ttm_base_object **),
void (*ref_obj_release) (struct ttm_base_object *,
enum ttm_ref_type ref_type))
{
struct ttm_object_device *tdev = tfile->tdev;
int ret;
base->shareable = shareable;
base->tfile = ttm_object_file_ref(tfile);
base->refcount_release = rcount_release;
base->ref_obj_release = ref_obj_release;
base->object_type = object_type;
refcount_init(&base->refcount, 1);
rw_init(&tdev->object_lock, "ttmbao");
rw_wlock(&tdev->object_lock);
ret = drm_ht_just_insert_please(&tdev->object_hash,
&base->hash,
(unsigned long)base, 31, 0, 0);
rw_wunlock(&tdev->object_lock);
if (unlikely(ret != 0))
goto out_err0;
ret = ttm_ref_object_add(tfile, base, TTM_REF_USAGE, NULL);
if (unlikely(ret != 0))
goto out_err1;
ttm_base_object_unref(&base);
return 0;
out_err1:
rw_wlock(&tdev->object_lock);
(void)drm_ht_remove_item(&tdev->object_hash, &base->hash);
rw_wunlock(&tdev->object_lock);
out_err0:
return ret;
}
static void ttm_release_base(struct kref *kref)
{
struct ttm_base_object *base =
container_of(kref, struct ttm_base_object, refcount);
struct ttm_object_device *tdev = base->tfile->tdev;
if (atomic_read(&kref->refcount)) {
lockmgr(&tdev->object_lock, LK_RELEASE);
return;
}
(void)drm_ht_remove_item(&tdev->object_hash, &base->hash);
lockmgr(&tdev->object_lock, LK_RELEASE);
/*
* Note: We don't use synchronize_rcu() here because it's far
* too slow. It's up to the user to free the object using
* call_rcu() or ttm_base_object_kfree().
*/
if (base->refcount_release) {
ttm_object_file_unref(&base->tfile);
base->refcount_release(&base);
}
}
