diff options
Diffstat (limited to 'include/linux/iommu-helper.h')
| -rw-r--r-- | include/linux/iommu-helper.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/iommu-helper.h b/include/linux/iommu-helper.h index c975caf75385..a6d0586e2bf7 100644 --- a/include/linux/iommu-helper.h +++ b/include/linux/iommu-helper.h @@ -1,6 +1,20 @@ +#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, @@ -8,3 +22,5 @@ extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size, unsigned long align_mask); extern void iommu_area_free(unsigned long *map, unsigned long start, unsigned int nr); + +#endif |