diff options
Diffstat (limited to 'include/linux/iommu-helper.h')
| -rw-r--r-- | include/linux/iommu-helper.h | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/include/linux/iommu-helper.h b/include/linux/iommu-helper.h index 3b068e5b5671..86bdeffe43ad 100644 --- a/include/linux/iommu-helper.h +++ b/include/linux/iommu-helper.h @@ -1,6 +1,8 @@ #ifndef _LINUX_IOMMU_HELPER_H #define _LINUX_IOMMU_HELPER_H +#include <linux/kernel.h> + static inline unsigned long iommu_device_max_index(unsigned long size, unsigned long offset, u64 dma_mask) @@ -14,16 +16,19 @@ static inline unsigned long iommu_device_max_index(unsigned long 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); +static inline unsigned long iommu_num_pages(unsigned long addr, + unsigned long len, + unsigned long io_page_size) +{ + unsigned long size = (addr & (io_page_size - 1)) + len; + + return DIV_ROUND_UP(size, io_page_size); +} #endif |