[deliverable/linux.git] / include / linux / iommu-helper.h

#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 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 unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
				     unsigned long io_page_size);

#endif
Commit	Line	Data
	1	#ifndef _LINUX_IOMMU_HELPER_H
	2	#define _LINUX_IOMMU_HELPER_H
	3
	4	static inline unsigned long iommu_device_max_index(unsigned long size,
	5	unsigned long offset,
	6	u64 dma_mask)
	7	{
	8	if (size + offset > dma_mask)
	9	return dma_mask - offset + 1;
	10	else
	11	return size;
	12	}
	13
	14	extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
	15	unsigned long shift,
	16	unsigned long boundary_size);
	17	extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
	18	unsigned long start, unsigned int nr,
	19	unsigned long shift,
	20	unsigned long boundary_size,
	21	unsigned long align_mask);
	22
	23	extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
	24	unsigned long io_page_size);
	25
	26	#endif