dma_get_seg_boundary
base_index = ALIGN(iommu_bus_base & dma_get_seg_boundary(dev),
unsigned long seg_mask = dma_get_seg_boundary(dev);
unsigned long mask = dma_get_seg_boundary(dev);
unsigned int max_seg_boundary = dma_get_seg_boundary(dev) + 1;
return (dma_get_seg_boundary(dev) >> page_shift) + 1;
u64 start, end, boundary = dma_get_seg_boundary(dev);
unsigned long boundary_mask = dma_get_seg_boundary(dev);