[deliverable/linux.git] / arch / arm / include / asm / dma-iommu.h

#ifndef ASMARM_DMA_IOMMU_H
#define ASMARM_DMA_IOMMU_H

#ifdef __KERNEL__

#include <linux/mm_types.h>
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#include <linux/kmemcheck.h>
#include <linux/kref.h>

struct dma_iommu_mapping {
	/* iommu specific data */
	struct iommu_domain	*domain;

	unsigned long		**bitmaps;	/* array of bitmaps */
	unsigned int		nr_bitmaps;	/* nr of elements in array */
	unsigned int		extensions;
	size_t			bitmap_size;	/* size of a single bitmap */
	size_t			bits;		/* per bitmap */
	dma_addr_t		base;

	spinlock_t		lock;
	struct kref		kref;
};

struct dma_iommu_mapping *
arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size);

void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);

int arm_iommu_attach_device(struct device *dev,
					struct dma_iommu_mapping *mapping);
void arm_iommu_detach_device(struct device *dev);

#endif /* __KERNEL__ */
#endif
Commit	Line	Data
4ce63fcd MS	1	#ifndef ASMARM_DMA_IOMMU_H
	2	#define ASMARM_DMA_IOMMU_H
	3
	4	#ifdef __KERNEL__
	5
	6	#include <linux/mm_types.h>
	7	#include <linux/scatterlist.h>
	8	#include <linux/dma-debug.h>
	9	#include <linux/kmemcheck.h>
3e3a1823	10	#include <linux/kref.h>
4ce63fcd MS	11
	12	struct dma_iommu_mapping {
	13	/* iommu specific data */
	14	struct iommu_domain *domain;
	15
4d852ef8 AH	16	unsigned long *bitmaps; / array of bitmaps */
	17	unsigned int nr_bitmaps; /* nr of elements in array */
	18	unsigned int extensions;
	19	size_t bitmap_size; /* size of a single bitmap */
	20	size_t bits; /* per bitmap */
4ce63fcd MS	21	dma_addr_t base;
	22
	23	spinlock_t lock;
	24	struct kref kref;
	25	};
	26
	27	struct dma_iommu_mapping *
1424532b	28	arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size);
4ce63fcd MS	29
	30	void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
	31
	32	int arm_iommu_attach_device(struct device *dev,
	33	struct dma_iommu_mapping *mapping);
6fe36758	34	void arm_iommu_detach_device(struct device *dev);
4ce63fcd MS	35
	36	#endif /* __KERNEL__ */
	37	#endif