AGE_CMB_BLOCK_SZ
AGE_CMB_BLOCK_SZ, age_dmamap_cb, &ctx, 0);
bzero(rd->age_cmb_block, AGE_CMB_BLOCK_SZ);
cmb_block_end = sc->age_rdata.age_cmb_block_paddr + AGE_CMB_BLOCK_SZ;
AGE_CMB_BLOCK_SZ, /* maxsize */
AGE_CMB_BLOCK_SZ, /* maxsegsize */