IO_PAGE_ALIGN
size = IO_PAGE_ALIGN(size);
npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK);
npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK);
npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK);
npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length)
size = IO_PAGE_ALIGN(size);
npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK);
npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK);