[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>

extern dma_addr_t bad_dma_address;
extern int iommu_merge;
extern struct device fallback_dev;
extern int panic_on_overflow;
extern int force_iommu;

struct dma_mapping_ops {
	int             (*mapping_error)(struct device *dev,
					 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 struct dma_mapping_ops *dma_ops;

static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
{
#ifdef CONFIG_X86_32
	return dma_ops;
#else
	if (unlikely(!dev) || !dev->archdata.dma_ops)
		return dma_ops;
	else
		return dev->archdata.dma_ops;
#endif
}

/* Make sure we keep the same behaviour */
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
#ifdef CONFIG_X86_32
	return 0;
#else
	struct dma_mapping_ops *ops = get_dma_ops(dev);
	if (ops->mapping_error)
		return ops->mapping_error(dev, dma_addr);

	return (dma_addr == bad_dma_address);
#endif
}

#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);

static inline dma_addr_t
dma_map_single(struct device *hwdev, void *ptr, size_t size,
	       int direction)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	return 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)
{
	struct dma_mapping_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(direction));
	if (ops->unmap_single)
		ops->unmap_single(dev, addr, size, direction);
}

static inline int
dma_map_sg(struct device *hwdev, struct scatterlist *sg,
	   int nents, int direction)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	return ops->map_sg(hwdev, sg, nents, direction);
}

static inline void
dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
	     int direction)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	if (ops->unmap_sg)
		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)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	if (ops->sync_single_for_cpu)
		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)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	if (ops->sync_single_for_device)
		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)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	if (ops->sync_single_range_for_cpu)
		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)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	if (ops->sync_single_range_for_device)
		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)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	if (ops->sync_sg_for_cpu)
		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)
{
	struct dma_mapping_ops *ops = get_dma_ops(hwdev);

	BUG_ON(!valid_dma_direction(direction));
	if (ops->sync_sg_for_device)
		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)
{
	struct dma_mapping_ops *ops = get_dma_ops(dev);

	BUG_ON(!valid_dma_direction(direction));
	return 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();
}

static inline int dma_get_cache_alignment(void)
{
	/* no easy way to get cache size on all x86, so return the
	 * maximum possible, to be safe */
	return boot_cpu_data.x86_clflush_size;
}

#define dma_is_consistent(d, h)	(1)

#include <asm-generic/dma-coherent.h>
#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
7c183416	13	extern dma_addr_t bad_dma_address;
b7107a3d GC	14	extern int iommu_merge;
	15	extern struct device fallback_dev;
	16	extern int panic_on_overflow;
fae9a0d8	17	extern int force_iommu;
7c183416	18
6f536635	19	struct dma_mapping_ops {
8d8bb39b FT	20	int (mapping_error)(struct device dev,
8d8bb39b FT	21	dma_addr_t dma_addr);
6f536635 GC	22	void* (alloc_coherent)(struct device dev, size_t size,
	23	dma_addr_t *dma_handle, gfp_t gfp);
	24	void (free_coherent)(struct device dev, size_t size,
	25	void *vaddr, dma_addr_t dma_handle);
2be62149	26	dma_addr_t (map_single)(struct device hwdev, phys_addr_t ptr,
6f536635 GC	27	size_t size, int direction);
6f536635 GC	28	/* like map_single, but doesn't check the device mask */
2be62149	29	dma_addr_t (map_simple)(struct device hwdev, phys_addr_t ptr,
6f536635 GC	30	size_t size, int direction);
	31	void (unmap_single)(struct device dev, dma_addr_t addr,
	32	size_t size, int direction);
	33	void (sync_single_for_cpu)(struct device hwdev,
	34	dma_addr_t dma_handle, size_t size,
	35	int direction);
	36	void (sync_single_for_device)(struct device hwdev,
	37	dma_addr_t dma_handle, size_t size,
	38	int direction);
	39	void (sync_single_range_for_cpu)(struct device hwdev,
	40	dma_addr_t dma_handle, unsigned long offset,
	41	size_t size, int direction);
	42	void (sync_single_range_for_device)(struct device hwdev,
	43	dma_addr_t dma_handle, unsigned long offset,
	44	size_t size, int direction);
	45	void (sync_sg_for_cpu)(struct device hwdev,
	46	struct scatterlist *sg, int nelems,
	47	int direction);
	48	void (sync_sg_for_device)(struct device hwdev,
	49	struct scatterlist *sg, int nelems,
	50	int direction);
	51	int (map_sg)(struct device hwdev, struct scatterlist *sg,
	52	int nents, int direction);
	53	void (unmap_sg)(struct device hwdev,
	54	struct scatterlist *sg, int nents,
	55	int direction);
	56	int (dma_supported)(struct device hwdev, u64 mask);
	57	int is_phys;
	58	};
	59
8d8bb39b	60	extern struct dma_mapping_ops *dma_ops;
22456b97	61
8d8bb39b	62	static inline struct dma_mapping_ops get_dma_ops(struct device dev)
c786df08	63	{
8d8bb39b FT	64	#ifdef CONFIG_X86_32
	65	return dma_ops;
	66	#else
	67	if (unlikely(!dev) \|\| !dev->archdata.dma_ops)
	68	return dma_ops;
	69	else
	70	return dev->archdata.dma_ops;
	71	#endif
	72	}
	73
	74	/* Make sure we keep the same behaviour */
	75	static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
	76	{
	77	#ifdef CONFIG_X86_32
	78	return 0;
	79	#else
	80	struct dma_mapping_ops *ops = get_dma_ops(dev);
	81	if (ops->mapping_error)
	82	return ops->mapping_error(dev, dma_addr);
c786df08 GC	83
c786df08 GC	84	return (dma_addr == bad_dma_address);
8d8bb39b	85	#endif
c786df08 GC	86	}
c786df08 GC	87
8d396ded GC	88	#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
	89	#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
	90
	91	void dma_alloc_coherent(struct device dev, size_t size,
	92	dma_addr_t *dma_handle, gfp_t flag);
	93
	94	void dma_free_coherent(struct device *dev, size_t size,
	95	void *vaddr, dma_addr_t dma_handle);
	96
	97
802c1f66 GC	98	extern int dma_supported(struct device *hwdev, u64 mask);
	99	extern int dma_set_mask(struct device *dev, u64 mask);
	100
22456b97 GC	101	static inline dma_addr_t
	102	dma_map_single(struct device hwdev, void ptr, size_t size,
	103	int direction)
	104	{
8d8bb39b FT	105	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
8d8bb39b FT	106
22456b97	107	BUG_ON(!valid_dma_direction(direction));
8d8bb39b	108	return ops->map_single(hwdev, virt_to_phys(ptr), size, direction);
22456b97 GC	109	}
22456b97 GC	110
0cb0ae68 GC	111	static inline void
	112	dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
	113	int direction)
	114	{
8d8bb39b FT	115	struct dma_mapping_ops *ops = get_dma_ops(dev);
8d8bb39b FT	116
0cb0ae68	117	BUG_ON(!valid_dma_direction(direction));
8d8bb39b FT	118	if (ops->unmap_single)
8d8bb39b FT	119	ops->unmap_single(dev, addr, size, direction);
0cb0ae68 GC	120	}
0cb0ae68 GC	121
16a3ce9b GC	122	static inline int
	123	dma_map_sg(struct device hwdev, struct scatterlist sg,
	124	int nents, int direction)
	125	{
8d8bb39b FT	126	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
8d8bb39b FT	127
16a3ce9b	128	BUG_ON(!valid_dma_direction(direction));
8d8bb39b	129	return ops->map_sg(hwdev, sg, nents, direction);
16a3ce9b	130	}
72c784f8 GC	131
	132	static inline void
	133	dma_unmap_sg(struct device hwdev, struct scatterlist sg, int nents,
	134	int direction)
	135	{
8d8bb39b FT	136	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
8d8bb39b FT	137
72c784f8	138	BUG_ON(!valid_dma_direction(direction));
8d8bb39b FT	139	if (ops->unmap_sg)
8d8bb39b FT	140	ops->unmap_sg(hwdev, sg, nents, direction);
72c784f8	141	}
c01dd8cf GC	142
	143	static inline void
	144	dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
	145	size_t size, int direction)
	146	{
8d8bb39b FT	147	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
8d8bb39b FT	148
c01dd8cf	149	BUG_ON(!valid_dma_direction(direction));
8d8bb39b FT	150	if (ops->sync_single_for_cpu)
8d8bb39b FT	151	ops->sync_single_for_cpu(hwdev, dma_handle, size, direction);
c01dd8cf GC	152	flush_write_buffers();
	153	}
	154
9231b269 GC	155	static inline void
	156	dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
	157	size_t size, int direction)
	158	{
8d8bb39b FT	159	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
8d8bb39b FT	160
9231b269	161	BUG_ON(!valid_dma_direction(direction));
8d8bb39b FT	162	if (ops->sync_single_for_device)
8d8bb39b FT	163	ops->sync_single_for_device(hwdev, dma_handle, size, direction);
9231b269 GC	164	flush_write_buffers();
	165	}
	166
627610fc GC	167	static inline void
	168	dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
	169	unsigned long offset, size_t size, int direction)
	170	{
8d8bb39b	171	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
627610fc	172
8d8bb39b FT	173	BUG_ON(!valid_dma_direction(direction));
	174	if (ops->sync_single_range_for_cpu)
	175	ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
	176	size, direction);
627610fc GC	177	flush_write_buffers();
627610fc GC	178	}
71362332 GC	179
	180	static inline void
	181	dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
	182	unsigned long offset, size_t size,
	183	int direction)
	184	{
8d8bb39b	185	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
71362332	186
8d8bb39b FT	187	BUG_ON(!valid_dma_direction(direction));
	188	if (ops->sync_single_range_for_device)
	189	ops->sync_single_range_for_device(hwdev, dma_handle,
	190	offset, size, direction);
71362332 GC	191	flush_write_buffers();
	192	}
	193
ed435dee GC	194	static inline void
	195	dma_sync_sg_for_cpu(struct device hwdev, struct scatterlist sg,
	196	int nelems, int direction)
	197	{
8d8bb39b FT	198	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
8d8bb39b FT	199
ed435dee	200	BUG_ON(!valid_dma_direction(direction));
8d8bb39b FT	201	if (ops->sync_sg_for_cpu)
8d8bb39b FT	202	ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
ed435dee GC	203	flush_write_buffers();
ed435dee GC	204	}
e7f3a913 GC	205
	206	static inline void
	207	dma_sync_sg_for_device(struct device hwdev, struct scatterlist sg,
	208	int nelems, int direction)
	209	{
8d8bb39b FT	210	struct dma_mapping_ops *ops = get_dma_ops(hwdev);
8d8bb39b FT	211
e7f3a913	212	BUG_ON(!valid_dma_direction(direction));
8d8bb39b FT	213	if (ops->sync_sg_for_device)
8d8bb39b FT	214	ops->sync_sg_for_device(hwdev, sg, nelems, direction);
e7f3a913 GC	215
	216	flush_write_buffers();
	217	}
4d92fbf2 GC	218
	219	static inline dma_addr_t dma_map_page(struct device dev, struct page page,
	220	size_t offset, size_t size,
	221	int direction)
	222	{
8d8bb39b FT	223	struct dma_mapping_ops *ops = get_dma_ops(dev);
8d8bb39b FT	224
2be62149	225	BUG_ON(!valid_dma_direction(direction));
8d8bb39b FT	226	return ops->map_single(dev, page_to_phys(page) + offset,
8d8bb39b FT	227	size, direction);
4d92fbf2 GC	228	}
	229
	230	static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
	231	size_t size, int direction)
	232	{
	233	dma_unmap_single(dev, addr, size, direction);
	234	}
	235
3cb6a917 GC	236	static inline void
	237	dma_cache_sync(struct device dev, void vaddr, size_t size,
	238	enum dma_data_direction dir)
	239	{
	240	flush_write_buffers();
	241	}
ae17a63b	242
b7107a3d GC	243	static inline int dma_get_cache_alignment(void)
	244	{
	245	/* no easy way to get cache size on all x86, so return the
	246	* maximum possible, to be safe */
	247	return boot_cpu_data.x86_clflush_size;
	248	}
	249
	250	#define dma_is_consistent(d, h) (1)
	251
323ec001	252	#include <asm-generic/dma-coherent.h>
6f536635	253	#endif