AHD_NSEG
/*nsegments*/AHD_NSEG,
list_size = sizeof(struct ahd_dma_seg) * AHD_NSEG;
list_size = sizeof(struct ahd_dma64_seg) * AHD_NSEG;
/*maxsize*/(AHD_NSEG - 1) * PAGE_SIZE,
/*nsegments*/AHD_NSEG,