MVGBE_TX_RING_ADDR
MVGBE_WRITE(sc, MVGBE_TCQDP, MVGBE_TX_RING_ADDR(sc, 0));
H2MVGBE32(MVGBE_TX_RING_ADDR(sc, 0));
H2MVGBE32(MVGBE_TX_RING_ADDR(sc, i + 1));