diff options
Diffstat (limited to 'drivers/staging/omapdrm/omap_gem_helpers.c')
| -rw-r--r-- | drivers/staging/omapdrm/omap_gem_helpers.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/staging/omapdrm/omap_gem_helpers.c b/drivers/staging/omapdrm/omap_gem_helpers.c index 1cfc12d35593..29275c7209e9 100644 --- a/drivers/staging/omapdrm/omap_gem_helpers.c +++ b/drivers/staging/omapdrm/omap_gem_helpers.c @@ -112,3 +112,58 @@ void _drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages, drm_free_large(pages); } + +int +_drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size) +{ + struct drm_device *dev = obj->dev; + struct drm_gem_mm *mm = dev->mm_private; + struct drm_map_list *list; + struct drm_local_map *map; + int ret = 0; + + /* Set the object up for mmap'ing */ + list = &obj->map_list; + list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); + if (!list->map) + return -ENOMEM; + + map = list->map; + map->type = _DRM_GEM; + map->size = size; + map->handle = obj; + + /* Get a DRM GEM mmap offset allocated... */ + list->file_offset_node = drm_mm_search_free(&mm->offset_manager, + size / PAGE_SIZE, 0, 0); + + if (!list->file_offset_node) { + DRM_ERROR("failed to allocate offset for bo %d\n", obj->name); + ret = -ENOSPC; + goto out_free_list; + } + + list->file_offset_node = drm_mm_get_block(list->file_offset_node, + size / PAGE_SIZE, 0); + if (!list->file_offset_node) { + ret = -ENOMEM; + goto out_free_list; + } + + list->hash.key = list->file_offset_node->start; + ret = drm_ht_insert_item(&mm->offset_hash, &list->hash); + if (ret) { + DRM_ERROR("failed to add to map hash\n"); + goto out_free_mm; + } + + return 0; + +out_free_mm: + drm_mm_put_block(list->file_offset_node); +out_free_list: + kfree(list->map); + list->map = NULL; + + return ret; +} |