[deliverable/linux.git] / include / asm-x86 / dma-mapping.h

#ifndef _ASM_DMA_MAPPING_H_
#define _ASM_DMA_MAPPING_H_

/*
 * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
 * documentation.
 */

#include <linux/scatterlist.h>
#include <asm/io.h>
#include <asm/swiotlb.h>

struct dma_mapping_ops {
	int             (*mapping_error)(dma_addr_t dma_addr);
	void*           (*alloc_coherent)(struct device *dev, size_t size,
				dma_addr_t *dma_handle, gfp_t gfp);
	void            (*free_coherent)(struct device *dev, size_t size,
				void *vaddr, dma_addr_t dma_handle);
	dma_addr_t      (*map_single)(struct device *hwdev, phys_addr_t ptr,
				size_t size, int direction);
	/* like map_single, but doesn't check the device mask */
	dma_addr_t      (*map_simple)(struct device *hwdev, phys_addr_t ptr,
				size_t size, int direction);
	void            (*unmap_single)(struct device *dev, dma_addr_t addr,
				size_t size, int direction);
	void            (*sync_single_for_cpu)(struct device *hwdev,
				dma_addr_t dma_handle, size_t size,
				int direction);
	void            (*sync_single_for_device)(struct device *hwdev,
				dma_addr_t dma_handle, size_t size,
				int direction);
	void            (*sync_single_range_for_cpu)(struct device *hwdev,
				dma_addr_t dma_handle, unsigned long offset,
				size_t size, int direction);
	void            (*sync_single_range_for_device)(struct device *hwdev,
				dma_addr_t dma_handle, unsigned long offset,
				size_t size, int direction);
	void            (*sync_sg_for_cpu)(struct device *hwdev,
				struct scatterlist *sg, int nelems,
				int direction);
	void            (*sync_sg_for_device)(struct device *hwdev,
				struct scatterlist *sg, int nelems,
				int direction);
	int             (*map_sg)(struct device *hwdev, struct scatterlist *sg,
				int nents, int direction);
	void            (*unmap_sg)(struct device *hwdev,
				struct scatterlist *sg, int nents,
				int direction);
	int             (*dma_supported)(struct device *hwdev, u64 mask);
	int		is_phys;
};

extern const struct dma_mapping_ops *dma_ops;

#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)

void *dma_alloc_coherent(struct device *dev, size_t size,
			   dma_addr_t *dma_handle, gfp_t flag);

void dma_free_coherent(struct device *dev, size_t size,
			 void *vaddr, dma_addr_t dma_handle);


extern int dma_supported(struct device *hwdev, u64 mask);
extern int dma_set_mask(struct device *dev, u64 mask);

#ifdef CONFIG_X86_32
# include "dma-mapping_32.h"
#else
# include "dma-mapping_64.h"
#endif

static inline dma_addr_t
dma_map_single(struct device *hwdev, void *ptr, size_t size,
	       int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	return dma_ops->map_single(hwdev, virt_to_phys(ptr), size, direction);
}

static inline void
dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
		 int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	if (dma_ops->unmap_single)
		dma_ops->unmap_single(dev, addr, size, direction);
}

static inline int
dma_map_sg(struct device *hwdev, struct scatterlist *sg,
	   int nents, int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	return dma_ops->map_sg(hwdev, sg, nents, direction);
}

static inline void
dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
	     int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	if (dma_ops->unmap_sg)
		dma_ops->unmap_sg(hwdev, sg, nents, direction);
}

static inline void
dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
			size_t size, int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	if (dma_ops->sync_single_for_cpu)
		dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
					     direction);
	flush_write_buffers();
}

static inline void
dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
			   size_t size, int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	if (dma_ops->sync_single_for_device)
		dma_ops->sync_single_for_device(hwdev, dma_handle, size,
						direction);
	flush_write_buffers();
}

static inline void
dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
			      unsigned long offset, size_t size, int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	if (dma_ops->sync_single_range_for_cpu)
		dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
						   size, direction);

	flush_write_buffers();
}

static inline void
dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
				 unsigned long offset, size_t size,
				 int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	if (dma_ops->sync_single_range_for_device)
		dma_ops->sync_single_range_for_device(hwdev, dma_handle,
						      offset, size, direction);

	flush_write_buffers();
}

static inline void
dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
		    int nelems, int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	if (dma_ops->sync_sg_for_cpu)
		dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
	flush_write_buffers();
}

static inline void
dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
		       int nelems, int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	if (dma_ops->sync_sg_for_device)
		dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction);

	flush_write_buffers();
}

static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
				      size_t offset, size_t size,
				      int direction)
{
	BUG_ON(!valid_dma_direction(direction));
	return dma_ops->map_single(dev, page_to_phys(page)+offset,
				   size, direction);
}

static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
				  size_t size, int direction)
{
	dma_unmap_single(dev, addr, size, direction);
}

static inline void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
	enum dma_data_direction dir)
{
	flush_write_buffers();
}
#endif
Commit	Line	Data
6f536635 GC	1	#ifndef _ASM_DMA_MAPPING_H_
	2	#define _ASM_DMA_MAPPING_H_
	3
	4	/*
	5	* IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
	6	* documentation.
	7	*/
	8
	9	#include <linux/scatterlist.h>
	10	#include <asm/io.h>
	11	#include <asm/swiotlb.h>
	12
	13	struct dma_mapping_ops {
	14	int (*mapping_error)(dma_addr_t dma_addr);
	15	void* (alloc_coherent)(struct device dev, size_t size,
	16	dma_addr_t *dma_handle, gfp_t gfp);
	17	void (free_coherent)(struct device dev, size_t size,
	18	void *vaddr, dma_addr_t dma_handle);
2be62149	19	dma_addr_t (map_single)(struct device hwdev, phys_addr_t ptr,
6f536635 GC	20	size_t size, int direction);
6f536635 GC	21	/* like map_single, but doesn't check the device mask */
2be62149	22	dma_addr_t (map_simple)(struct device hwdev, phys_addr_t ptr,
6f536635 GC	23	size_t size, int direction);
	24	void (unmap_single)(struct device dev, dma_addr_t addr,
	25	size_t size, int direction);
	26	void (sync_single_for_cpu)(struct device hwdev,
	27	dma_addr_t dma_handle, size_t size,
	28	int direction);
	29	void (sync_single_for_device)(struct device hwdev,
	30	dma_addr_t dma_handle, size_t size,
	31	int direction);
	32	void (sync_single_range_for_cpu)(struct device hwdev,
	33	dma_addr_t dma_handle, unsigned long offset,
	34	size_t size, int direction);
	35	void (sync_single_range_for_device)(struct device hwdev,
	36	dma_addr_t dma_handle, unsigned long offset,
	37	size_t size, int direction);
	38	void (sync_sg_for_cpu)(struct device hwdev,
	39	struct scatterlist *sg, int nelems,
	40	int direction);
	41	void (sync_sg_for_device)(struct device hwdev,
	42	struct scatterlist *sg, int nelems,
	43	int direction);
	44	int (map_sg)(struct device hwdev, struct scatterlist *sg,
	45	int nents, int direction);
	46	void (unmap_sg)(struct device hwdev,
	47	struct scatterlist *sg, int nents,
	48	int direction);
	49	int (dma_supported)(struct device hwdev, u64 mask);
	50	int is_phys;
	51	};
	52
22456b97 GC	53	extern const struct dma_mapping_ops *dma_ops;
22456b97 GC	54
8d396ded GC	55	#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
	56	#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
	57
	58	void dma_alloc_coherent(struct device dev, size_t size,
	59	dma_addr_t *dma_handle, gfp_t flag);
	60
	61	void dma_free_coherent(struct device *dev, size_t size,
	62	void *vaddr, dma_addr_t dma_handle);
	63
	64
802c1f66 GC	65	extern int dma_supported(struct device *hwdev, u64 mask);
	66	extern int dma_set_mask(struct device *dev, u64 mask);
	67
96a388de TG	68	#ifdef CONFIG_X86_32
	69	# include "dma-mapping_32.h"
	70	#else
	71	# include "dma-mapping_64.h"
	72	#endif
6f536635	73
22456b97 GC	74	static inline dma_addr_t
	75	dma_map_single(struct device hwdev, void ptr, size_t size,
	76	int direction)
	77	{
	78	BUG_ON(!valid_dma_direction(direction));
2be62149	79	return dma_ops->map_single(hwdev, virt_to_phys(ptr), size, direction);
22456b97 GC	80	}
22456b97 GC	81
0cb0ae68 GC	82	static inline void
	83	dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
	84	int direction)
	85	{
	86	BUG_ON(!valid_dma_direction(direction));
	87	if (dma_ops->unmap_single)
	88	dma_ops->unmap_single(dev, addr, size, direction);
	89	}
	90
16a3ce9b GC	91	static inline int
	92	dma_map_sg(struct device hwdev, struct scatterlist sg,
	93	int nents, int direction)
	94	{
	95	BUG_ON(!valid_dma_direction(direction));
	96	return dma_ops->map_sg(hwdev, sg, nents, direction);
	97	}
72c784f8 GC	98
	99	static inline void
	100	dma_unmap_sg(struct device hwdev, struct scatterlist sg, int nents,
	101	int direction)
	102	{
	103	BUG_ON(!valid_dma_direction(direction));
	104	if (dma_ops->unmap_sg)
	105	dma_ops->unmap_sg(hwdev, sg, nents, direction);
	106	}
c01dd8cf GC	107
	108	static inline void
	109	dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
	110	size_t size, int direction)
	111	{
	112	BUG_ON(!valid_dma_direction(direction));
	113	if (dma_ops->sync_single_for_cpu)
	114	dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
	115	direction);
	116	flush_write_buffers();
	117	}
	118
9231b269 GC	119	static inline void
	120	dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
	121	size_t size, int direction)
	122	{
	123	BUG_ON(!valid_dma_direction(direction));
	124	if (dma_ops->sync_single_for_device)
	125	dma_ops->sync_single_for_device(hwdev, dma_handle, size,
	126	direction);
	127	flush_write_buffers();
	128	}
	129
627610fc GC	130	static inline void
	131	dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
	132	unsigned long offset, size_t size, int direction)
	133	{
	134	BUG_ON(!valid_dma_direction(direction));
	135	if (dma_ops->sync_single_range_for_cpu)
	136	dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
	137	size, direction);
	138
	139	flush_write_buffers();
	140	}
71362332 GC	141
	142	static inline void
	143	dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
	144	unsigned long offset, size_t size,
	145	int direction)
	146	{
	147	BUG_ON(!valid_dma_direction(direction));
	148	if (dma_ops->sync_single_range_for_device)
	149	dma_ops->sync_single_range_for_device(hwdev, dma_handle,
	150	offset, size, direction);
	151
	152	flush_write_buffers();
	153	}
	154
ed435dee GC	155	static inline void
	156	dma_sync_sg_for_cpu(struct device hwdev, struct scatterlist sg,
	157	int nelems, int direction)
	158	{
	159	BUG_ON(!valid_dma_direction(direction));
	160	if (dma_ops->sync_sg_for_cpu)
	161	dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
	162	flush_write_buffers();
	163	}
e7f3a913 GC	164
	165	static inline void
	166	dma_sync_sg_for_device(struct device hwdev, struct scatterlist sg,
	167	int nelems, int direction)
	168	{
	169	BUG_ON(!valid_dma_direction(direction));
	170	if (dma_ops->sync_sg_for_device)
	171	dma_ops->sync_sg_for_device(hwdev, sg, nelems, direction);
	172
	173	flush_write_buffers();
	174	}
4d92fbf2 GC	175
	176	static inline dma_addr_t dma_map_page(struct device dev, struct page page,
	177	size_t offset, size_t size,
	178	int direction)
	179	{
2be62149 IM	180	BUG_ON(!valid_dma_direction(direction));
	181	return dma_ops->map_single(dev, page_to_phys(page)+offset,
	182	size, direction);
4d92fbf2 GC	183	}
	184
	185	static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
	186	size_t size, int direction)
	187	{
	188	dma_unmap_single(dev, addr, size, direction);
	189	}
	190
3cb6a917 GC	191	static inline void
	192	dma_cache_sync(struct device dev, void vaddr, size_t size,
	193	enum dma_data_direction dir)
	194	{
	195	flush_write_buffers();
	196	}
6f536635	197	#endif