nxe_ring_alloc
sc->sc_cmd_ring = nxe_ring_alloc(sc,
sc->sc_status_ring = nxe_ring_alloc(sc,
nr = nxe_ring_alloc(sc, sizeof(struct nxe_rx_desc),
struct nxe_ring *nxe_ring_alloc(struct nxe_softc *, size_t, u_int);