dmac_priority_t
static void dmac_start(struct pxadmac_softc *, dmac_priority_t);
dmac_allocate_channel(struct pxadmac_softc *sc, dmac_priority_t priority,
dmac_free_channel(struct pxadmac_softc *sc, dmac_priority_t priority,
dmac_start(struct pxadmac_softc *sc, dmac_priority_t priority)
dmac_priority_t dx_priority;