include/linux/iommu-helper.h

   1 static inline unsigned long iommu_device_max_index(unsigned long size,
   2                                                    unsigned long offset,
   3                                                    u64 dma_mask)
   4 {
   5         if (size + offset > dma_mask)
   6                 return dma_mask - offset + 1;
   7         else
   8                 return size;
   9 }
  10
  11 extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
  12                                   unsigned long shift,
  13                                   unsigned long boundary_size);
  14 extern void iommu_area_reserve(unsigned long *map, unsigned long i, int len);
  15 extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
  16                                       unsigned long start, unsigned int nr,
  17                                       unsigned long shift,
  18                                       unsigned long boundary_size,
  19                                       unsigned long align_mask);
  20 extern void iommu_area_free(unsigned long *map, unsigned long start,
  21                             unsigned int nr);