#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)
|
{
|
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 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);
|
|
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
|
