285 static inline void *vio_dring_cur(struct vio_dring_state *dr)  in vio_dring_cur()  argument
287 	return dr->base + (dr->entry_size * dr->prod);  in vio_dring_cur()
290 static inline void *vio_dring_entry(struct vio_dring_state *dr,  in vio_dring_entry()  argument
293 	return dr->base + (dr->entry_size * index);  in vio_dring_entry()
296 static inline u32 vio_dring_avail(struct vio_dring_state *dr,  in vio_dring_avail()  argument
299 	return (dr->pending -  in vio_dring_avail()
300 		((dr->prod - dr->cons) & (ring_size - 1)) - 1);  in vio_dring_avail()
303 static inline u32 vio_dring_next(struct vio_dring_state *dr, u32 index)  in vio_dring_next()  argument
305 	if (++index == dr->num_entries)  in vio_dring_next()
310 static inline u32 vio_dring_prev(struct vio_dring_state *dr, u32 index)  in vio_dring_prev()  argument
313 		return dr->num_entries - 1;  in vio_dring_prev()