NHI_TX_SIZE
error = bus_dmamap_create(sc->sc_dmat, NHI_TX_SIZE, 1,
NHI_TX_SIZE, 0, BUS_DMA_WAITOK, &sc->sc_tx_map[i]);
sc->sc_tx_buf[i] = dma_alloc(NHI_TX_SIZE, PR_WAITOK);
dma_free(sc->sc_tx_buf[i], NHI_TX_SIZE);