macb_rx_ring_wrap
entry = macb_rx_ring_wrap(bp, queue->rx_prepared_head);
entry = macb_rx_ring_wrap(bp, queue->rx_tail);
macb_rx_ring_wrap(bp, first_frag),
macb_rx_ring_wrap(bp, last_frag), len);
entry = macb_rx_ring_wrap(bp, queue->rx_tail);
index = macb_rx_ring_wrap(queue->bp, index);
macb_rx_ring_wrap(queue->bp, index);