iommu-helper.h revision a66022c457755b5eef61e30866114679c95e1f54 
1#ifndef _LINUX_IOMMU_HELPER_H
2#define _LINUX_IOMMU_HELPER_H
3
4static inline unsigned long iommu_device_max_index(unsigned long size,
5						   unsigned long offset,
6						   u64 dma_mask)
7{
8	if (size + offset > dma_mask)
9		return dma_mask - offset + 1;
10	else
11		return size;
12}
13
14extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
15				  unsigned long shift,
16				  unsigned long boundary_size);
17extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
18				      unsigned long start, unsigned int nr,
19				      unsigned long shift,
20				      unsigned long boundary_size,
21				      unsigned long align_mask);
22
23extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
24				     unsigned long io_page_size);
25
26#endif
27