jazz_dma_page_offs
off = jazz_dma_page_offs(segs[i]._ds_paddr);
jazz_dma_page_offs(segs[i].ds_addr)) / JAZZ_DMA_PAGE_SIZE;
off = jazz_dma_page_offs(buf);
size = jazz_dma_page_round(size + jazz_dma_page_offs(va));
size = jazz_dma_page_round(size + jazz_dma_page_offs(pa));