[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, void *ptr,
				size_t size, int direction);
	/* like map_single, but doesn't check the device mask */
	dma_addr_t      (*map_simple)(struct device *hwdev, char *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;

#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, 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();
}

#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);
	19	dma_addr_t (map_single)(struct device hwdev, void *ptr,
	20	size_t size, int direction);
	21	/* like map_single, but doesn't check the device mask */
	22	dma_addr_t (map_simple)(struct device hwdev, char *ptr,
	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
96a388de TG	55	#ifdef CONFIG_X86_32
	56	# include "dma-mapping_32.h"
	57	#else
	58	# include "dma-mapping_64.h"
	59	#endif
6f536635	60
22456b97 GC	61	static inline dma_addr_t
	62	dma_map_single(struct device hwdev, void ptr, size_t size,
	63	int direction)
	64	{
	65	BUG_ON(!valid_dma_direction(direction));
	66	return dma_ops->map_single(hwdev, ptr, size, direction);
	67	}
	68
0cb0ae68 GC	69	static inline void
	70	dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
	71	int direction)
	72	{
	73	BUG_ON(!valid_dma_direction(direction));
	74	if (dma_ops->unmap_single)
	75	dma_ops->unmap_single(dev, addr, size, direction);
	76	}
	77
16a3ce9b GC	78	static inline int
	79	dma_map_sg(struct device hwdev, struct scatterlist sg,
	80	int nents, int direction)
	81	{
	82	BUG_ON(!valid_dma_direction(direction));
	83	return dma_ops->map_sg(hwdev, sg, nents, direction);
	84	}
72c784f8 GC	85
	86	static inline void
	87	dma_unmap_sg(struct device hwdev, struct scatterlist sg, int nents,
	88	int direction)
	89	{
	90	BUG_ON(!valid_dma_direction(direction));
	91	if (dma_ops->unmap_sg)
	92	dma_ops->unmap_sg(hwdev, sg, nents, direction);
	93	}
c01dd8cf GC	94
	95	static inline void
	96	dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
	97	size_t size, int direction)
	98	{
	99	BUG_ON(!valid_dma_direction(direction));
	100	if (dma_ops->sync_single_for_cpu)
	101	dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
	102	direction);
	103	flush_write_buffers();
	104	}
	105
9231b269 GC	106	static inline void
	107	dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
	108	size_t size, int direction)
	109	{
	110	BUG_ON(!valid_dma_direction(direction));
	111	if (dma_ops->sync_single_for_device)
	112	dma_ops->sync_single_for_device(hwdev, dma_handle, size,
	113	direction);
	114	flush_write_buffers();
	115	}
	116
627610fc GC	117	static inline void
	118	dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
	119	unsigned long offset, size_t size, int direction)
	120	{
	121	BUG_ON(!valid_dma_direction(direction));
	122	if (dma_ops->sync_single_range_for_cpu)
	123	dma_ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
	124	size, direction);
	125
	126	flush_write_buffers();
	127	}
71362332 GC	128
	129	static inline void
	130	dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
	131	unsigned long offset, size_t size,
	132	int direction)
	133	{
	134	BUG_ON(!valid_dma_direction(direction));
	135	if (dma_ops->sync_single_range_for_device)
	136	dma_ops->sync_single_range_for_device(hwdev, dma_handle,
	137	offset, size, direction);
	138
	139	flush_write_buffers();
	140	}
	141
6f536635	142	#endif