diff options
| -rw-r--r-- | linux-core/drm_bo.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/linux-core/drm_bo.c b/linux-core/drm_bo.c index 74476d35..7439e27d 100644 --- a/linux-core/drm_bo.c +++ b/linux-core/drm_bo.c @@ -1346,6 +1346,49 @@ static int drm_bo_add_ttm(drm_file_t * priv, drm_buffer_object_t * bo) return ret; } +/* + * Transfer a buffer object's memory and LRU status to a newly + * created object. User-space references remains with the old + * object. Call bo->mutex locked. + */ + +int drm_buffer_object_transfer(drm_buffer_object_t *bo, + drm_buffer_object_t **new_obj) +{ + drm_buffer_object_t *fbo; + drm_device_t *dev = bo->dev; + drm_buffer_manager_t *bm = &dev->bm; + + fbo = drm_ctl_calloc(1, sizeof(*bo), DRM_MEM_BUFOBJ); + if (!fbo) + return -ENOMEM; + + *fbo = *bo; + mutex_init(&fbo->mutex); + mutex_lock(&fbo->mutex); + mutex_lock(&dev->struct_mutex); + + INIT_LIST_HEAD(&fbo->ddestroy); + INIT_LIST_HEAD(&fbo->lru); + list_splice_init(&bo->lru, &fbo->lru); + + bo->mm_node = NULL; + bo->ttm = NULL; + bo->ttm_object = NULL; + bo->fence = NULL; + bo->flags = 0; + + fbo->mm_node->private = (void *)fbo; + atomic_set(&fbo->usage, 1); + atomic_inc(&bm->count); + mutex_unlock(&dev->struct_mutex); + mutex_unlock(&fbo->mutex); + + *new_obj = fbo; + return 0; +} + + int drm_buffer_object_create(drm_file_t * priv, unsigned long size, drm_bo_type_t type, |