STGE_RX_RING_ADDR
STGE_ADDR_HI(STGE_RX_RING_ADDR(sc, 0)));
STGE_ADDR_LO(STGE_RX_RING_ADDR(sc, 0)));
addr = STGE_RX_RING_ADDR(sc, 0);
addr = STGE_RX_RING_ADDR(sc, i + 1);