ALC_SMB_SZ
error = bus_dmamap_create(sc->sc_dmat, ALC_SMB_SZ, 1,
ALC_SMB_SZ, 0, BUS_DMA_NOWAIT,
error = bus_dmamem_alloc(sc->sc_dmat, ALC_SMB_SZ,
nsegs, ALC_SMB_SZ, (caddr_t *)&sc->alc_rdata.alc_smb,
sc->alc_rdata.alc_smb, ALC_SMB_SZ, NULL,
bzero(rd->alc_smb, ALC_SMB_SZ);