JME_RX_RING_SIZE
bzero(rd->jme_rx_ring, JME_RX_RING_SIZE);
error = bus_dmamap_create(sc->sc_dmat, JME_RX_RING_SIZE, 1,
JME_RX_RING_SIZE, 0, BUS_DMA_NOWAIT,
error = bus_dmamem_alloc(sc->sc_dmat, JME_RX_RING_SIZE, ETHER_ALIGN, 0,
nsegs, JME_RX_RING_SIZE, (caddr_t *)&sc->jme_rdata.jme_rx_ring,
JME_RX_RING_SIZE, NULL, BUS_DMA_NOWAIT);
rx_ring_end = sc->jme_rdata.jme_rx_ring_paddr + JME_RX_RING_SIZE;