+ int (*bo_import)(struct bo *bo, struct drv_import_fd_data *data);
+ void *(*bo_map)(struct bo *bo, struct map_info *data, size_t plane, int prot);
+ int (*bo_unmap)(struct bo *bo, struct map_info *data);
+ uint32_t (*resolve_format)(uint32_t format, uint64_t usage);
+ struct combinations combos;