dma_range_map_max
size = dma_range_map_max(dev->dma_range_map) - dma_base;
end = dma_range_map_max(map);
end = dma_range_map_max(map);
dma_range_map_max(map) < domain->geometry.aperture_start) {
end = dma_range_map_max(map);