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Thomas Gleixner1e19b162008-10-06 14:15:24 +02001#ifndef _LINUX_IOMMU_HELPER_H
2#define _LINUX_IOMMU_HELPER_H
3
FUJITA Tomonorieecfffc2008-09-12 19:42:33 +09004static 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
FUJITA Tomonori37158632008-03-04 14:29:27 -080014extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
15 unsigned long shift,
16 unsigned long boundary_size);
FUJITA Tomonorid26dbc52008-09-22 22:35:07 +090017extern void iommu_area_reserve(unsigned long *map, unsigned long i, int len);
FUJITA Tomonori0291df82008-02-04 22:28:07 -080018extern 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);
23extern void iommu_area_free(unsigned long *map, unsigned long start,
24 unsigned int nr);
Thomas Gleixner1e19b162008-10-06 14:15:24 +020025
26#endif