WAR: gr3d: limit 3d clock when camera is on
[linux-2.6.git] / include / linux / iommu-helper.h
1 #ifndef _LINUX_IOMMU_HELPER_H
2 #define _LINUX_IOMMU_HELPER_H
3
4 #include <linux/kernel.h>
5
6 static inline unsigned long iommu_device_max_index(unsigned long size,
7                                                    unsigned long offset,
8                                                    u64 dma_mask)
9 {
10         if (size + offset > dma_mask)
11                 return dma_mask - offset + 1;
12         else
13                 return size;
14 }
15
16 extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
17                                   unsigned long shift,
18                                   unsigned long boundary_size);
19 extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
20                                       unsigned long start, unsigned int nr,
21                                       unsigned long shift,
22                                       unsigned long boundary_size,
23                                       unsigned long align_mask);
24
25 static inline unsigned long iommu_num_pages(unsigned long addr,
26                                             unsigned long len,
27                                             unsigned long io_page_size)
28 {
29         unsigned long size = (addr & (io_page_size - 1)) + len;
30
31         return DIV_ROUND_UP(size, io_page_size);
32 }
33
34 #endif