oce_dma_alloc
int oce_dma_alloc(struct oce_softc *, bus_size_t, struct oce_dma_mem *);
if (oce_dma_alloc(sc, sizeof(struct oce_bmbx), &sc->sc_mbx)) {
if (oce_dma_alloc(sc, OCE_MAX_PAYLOAD, &sc->sc_pld)) {