RX_AGG_RING
rxbd = &rxr->rx_agg_desc_ring[RX_AGG_RING(bn, prod)][RX_IDX(prod)];
prod_bd = &rxr->rx_agg_desc_ring[RX_AGG_RING(bn, prod)]
&rxr->rx_agg_desc_ring[RX_AGG_RING(bp, prod)][RX_IDX(prod)];
prod_bd = &rxr->rx_agg_desc_ring[RX_AGG_RING(bp, prod)][RX_IDX(prod)];