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Commit | Line | Data |
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1e19b16a TG |
1 | #ifndef _LINUX_IOMMU_HELPER_H |
2 | #define _LINUX_IOMMU_HELPER_H | |
3 | ||
eecfffc1 FT |
4 | static 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 | ||
3715863a FT |
14 | extern int iommu_is_span_boundary(unsigned int index, unsigned int nr, |
15 | unsigned long shift, | |
16 | unsigned long boundary_size); | |
d26dbc5c | 17 | extern void iommu_area_reserve(unsigned long *map, unsigned long i, int len); |
0291df8c FT |
18 | extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size, |
19 | unsigned long start, unsigned int nr, | |
20 | unsigned long shift, | |
21 | unsigned long boundary_size, | |
22 | unsigned long align_mask); | |
23 | extern void iommu_area_free(unsigned long *map, unsigned long start, | |
24 | unsigned int nr); | |
1e19b16a | 25 | |
56d93660 JR |
26 | extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len, |
27 | unsigned long io_page_size); | |
28 | ||
1e19b16a | 29 | #endif |