CS4231_BUFSZ
if (off >= CS4231_BUFSZ) {
off = CS4231_BUFSZ - 4;
rc = ddi_dma_mem_alloc(eng->ce_dmah, CS4231_BUFSZ, &buf_attr,
eng->ce_kaddr, CS4231_BUFSZ, dir | DDI_DMA_CONSISTENT,