xdma_prep_sg
xdma_prep_sg(sc->xchan_tx, TX_QUEUE_SIZE, maxphys, 8, 16, 0,
xdma_prep_sg(sc->xchan_rx, TX_QUEUE_SIZE, maxphys, 8, 16, 0,
int xdma_prep_sg(xdma_channel_t *, uint32_t,