AGE_CMB_BLOCK_SZ
bzero(rd->age_cmb_block, AGE_CMB_BLOCK_SZ);
error = bus_dmamap_create(sc->sc_dmat, AGE_CMB_BLOCK_SZ, 1,
AGE_CMB_BLOCK_SZ, 0, BUS_DMA_NOWAIT,
error = bus_dmamem_alloc(sc->sc_dmat, AGE_CMB_BLOCK_SZ,
nsegs, AGE_CMB_BLOCK_SZ, (caddr_t *)&sc->age_rdata.age_cmb_block,
sc->age_rdata.age_cmb_block, AGE_CMB_BLOCK_SZ, NULL,