BNX2_RX_RING_IDX
sw_ring_cons = BNX2_RX_RING_IDX(sw_cons);
sw_ring_prod = BNX2_RX_RING_IDX(sw_prod);
next_ring_idx = BNX2_RX_RING_IDX(BNX2_NEXT_RX_BD(sw_cons));
ring_prod = BNX2_RX_RING_IDX(prod);