aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/iommu-helper.h
blob: 64d1b638745d63bc0ac7569427e583db3236a0cc (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
#ifndef _LINUX_IOMMU_HELPER_H
#define _LINUX_IOMMU_HELPER_H

static inline unsigned long iommu_device_max_index(unsigned long size,
						   unsigned long offset,
						   u64 dma_mask)
{
	if (size + offset > dma_mask)
		return dma_mask - offset + 1;
	else
		return size;
}

extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
				  unsigned long shift,
				  unsigned long boundary_size);
extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
				      unsigned long start, unsigned int nr,
				      unsigned long shift,
				      unsigned long boundary_size,
				      unsigned long align_mask);

extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
				     unsigned long io_page_size);

#endif