EDMA_RX_RING_SIZE
mbufq_init(&mq, EDMA_RX_RING_SIZE);
sc->sc_config.rx_ring_count = EDMA_RX_RING_SIZE;
for (n = 0; n < EDMA_RX_RING_SIZE - 1; n++) {
for (i = 0; i < EDMA_RX_RING_SIZE; i++) {