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- #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);
- #endif
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