| #ifndef _LINUX_IOMMU_HELPER_H |
| #define _LINUX_IOMMU_HELPER_H |
| |
| static inline unsigned long iommu_device_max_index(unsigned long size, |
| unsigned long offset, |
| u64 dma_mask) |
| { |
| if (size + offset > dma_mask) |
| return dma_mask - offset + 1; |
| else |
| return size; |
| } |
| |
| extern int iommu_is_span_boundary(unsigned int index, unsigned int nr, |
| unsigned long shift, |
| unsigned long boundary_size); |
| extern void iommu_area_reserve(unsigned long *map, unsigned long i, int len); |
| extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size, |
| unsigned long start, unsigned int nr, |
| unsigned long shift, |
| unsigned long boundary_size, |
| unsigned long align_mask); |
| extern void iommu_area_free(unsigned long *map, unsigned long start, |
| unsigned int nr); |
| |
| extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len, |
| unsigned long io_page_size); |
| |
| #endif |