Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / include / linux / iommu-helper.h
1 #ifndef _LINUX_IOMMU_HELPER_H
2 #define _LINUX_IOMMU_HELPER_H
3
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
14 extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
15                                   unsigned long shift,
16                                   unsigned long boundary_size);
17 extern 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
23 extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
24                                      unsigned long io_page_size);
25
26 #endif