DESC0
ASSERT((dmfe_ring_get32(descp, index, DESC0) & TX_OWN) == 0);
dmfe_ring_put32(descp, index, DESC0, TX_OWN);
dmfe_ring_put32(descp, i, DESC0, RX_OWN);
dmfe_ring_put32(descp, i, DESC0, 0);
desc0 = dmfe_ring_get32(descp, index, DESC0);
dmfe_ring_put32(descp, index, DESC0, RX_OWN);
desc0 = dmfe_ring_get32(descp, index, DESC0);
desc0 = dmfe_ring_get32(descp, i, DESC0);
desc0 = dmfe_ring_get32(descp, i, DESC0);