ASD_SCB_SIZE
asd_ha->hw_prof.max_scbs = asd_get_cmdctx_size(asd_ha)/ASD_SCB_SIZE;
size = (max_cmnds - asd_ha->hw_prof.max_scbs + 1) * ASD_SCB_SIZE;
dma_addr = ALIGN((unsigned long) dma_handle, ASD_SCB_SIZE);
dma_addr -= asd_ha->hw_prof.max_scbs * ASD_SCB_SIZE;
for (i = 0; i < ASD_SCB_SIZE; i += 4)