[linux.git] / include / linux / swiotlb.h

#ifndef __LINUX_SWIOTLB_H
#define __LINUX_SWIOTLB_H

#include <linux/types.h>

struct device;
struct dma_attrs;
struct scatterlist;

extern int swiotlb_force;

/*
 * Maximum allowable number of contiguous slabs to map,
 * must be a power of 2.  What is the appropriate value ?
 * The complexity of {map,unmap}_single is linearly dependent on this value.
 */
#define IO_TLB_SEGSIZE	128

/*
 * log of the size of each IO TLB slab.  The number of slabs is command line
 * controllable.
 */
#define IO_TLB_SHIFT 11

extern void swiotlb_init(int verbose);
extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);

/*
 * Enumeration for sync targets
 */
enum dma_sync_target {
	SYNC_FOR_CPU = 0,
	SYNC_FOR_DEVICE = 1,
};
extern void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr,
				    phys_addr_t phys, size_t size,
				    enum dma_data_direction dir);

extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr,
				     size_t size, enum dma_data_direction dir);

extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr,
				    size_t size, enum dma_data_direction dir,
				    enum dma_sync_target target);

/* Accessory functions. */
extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
			   enum dma_data_direction dir);

extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
			dma_addr_t *dma_handle, gfp_t flags);

extern void
swiotlb_free_coherent(struct device *hwdev, size_t size,
		      void *vaddr, dma_addr_t dma_handle);

extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
				   unsigned long offset, size_t size,
				   enum dma_data_direction dir,
				   struct dma_attrs *attrs);
extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
			       size_t size, enum dma_data_direction dir,
			       struct dma_attrs *attrs);

extern int
swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
	       enum dma_data_direction dir);

extern void
swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
		 enum dma_data_direction dir);

extern int
swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
		     enum dma_data_direction dir, struct dma_attrs *attrs);

extern void
swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
		       int nelems, enum dma_data_direction dir,
		       struct dma_attrs *attrs);

extern void
swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
			    size_t size, enum dma_data_direction dir);

extern void
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
			int nelems, enum dma_data_direction dir);

extern void
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
			       size_t size, enum dma_data_direction dir);

extern void
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
			   int nelems, enum dma_data_direction dir);

extern int
swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);

extern int
swiotlb_dma_supported(struct device *hwdev, u64 mask);

#ifdef CONFIG_SWIOTLB
extern void __init swiotlb_free(void);
#else
static inline void swiotlb_free(void) { }
#endif

extern void swiotlb_print_info(void);
#endif /* __LINUX_SWIOTLB_H */
Commit	Line	Data
1648993f JR	1	#ifndef __LINUX_SWIOTLB_H
	2	#define __LINUX_SWIOTLB_H
	3
	4	#include <linux/types.h>
	5
	6	struct device;
	7	struct dma_attrs;
	8	struct scatterlist;
	9
6959450e FT	10	extern int swiotlb_force;
6959450e FT	11
0016fdee IC	12	/*
	13	* Maximum allowable number of contiguous slabs to map,
	14	* must be a power of 2. What is the appropriate value ?
	15	* The complexity of {map,unmap}_single is linearly dependent on this value.
	16	*/
	17	#define IO_TLB_SEGSIZE 128
	18
0016fdee IC	19	/*
	20	* log of the size of each IO TLB slab. The number of slabs is command line
	21	* controllable.
	22	*/
	23	#define IO_TLB_SHIFT 11
	24
ad32e8cb	25	extern void swiotlb_init(int verbose);
abbceff7	26	extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
1648993f	27
d7ef1533 KRW	28	/*
	29	* Enumeration for sync targets
	30	*/
	31	enum dma_sync_target {
	32	SYNC_FOR_CPU = 0,
	33	SYNC_FOR_DEVICE = 1,
	34	};
	35	extern void swiotlb_tbl_map_single(struct device hwdev, dma_addr_t tbl_dma_addr,
	36	phys_addr_t phys, size_t size,
	37	enum dma_data_direction dir);
	38
	39	extern void swiotlb_tbl_unmap_single(struct device hwdev, char dma_addr,
	40	size_t size, enum dma_data_direction dir);
	41
	42	extern void swiotlb_tbl_sync_single(struct device hwdev, char dma_addr,
	43	size_t size, enum dma_data_direction dir,
	44	enum dma_sync_target target);
	45
	46	/* Accessory functions. */
	47	extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
	48	enum dma_data_direction dir);
	49
1648993f JR	50	extern void
	51	swiotlb_alloc_coherent(struct device hwdev, size_t size,
	52	dma_addr_t *dma_handle, gfp_t flags);
	53
	54	extern void
	55	swiotlb_free_coherent(struct device *hwdev, size_t size,
	56	void *vaddr, dma_addr_t dma_handle);
	57
f98eee8e FT	58	extern dma_addr_t swiotlb_map_page(struct device dev, struct page page,
	59	unsigned long offset, size_t size,
	60	enum dma_data_direction dir,
	61	struct dma_attrs *attrs);
	62	extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
	63	size_t size, enum dma_data_direction dir,
	64	struct dma_attrs *attrs);
1648993f JR	65
	66	extern int
	67	swiotlb_map_sg(struct device hwdev, struct scatterlist sg, int nents,
22d48269	68	enum dma_data_direction dir);
1648993f JR	69
	70	extern void
	71	swiotlb_unmap_sg(struct device hwdev, struct scatterlist sg, int nents,
22d48269	72	enum dma_data_direction dir);
1648993f JR	73
	74	extern int
	75	swiotlb_map_sg_attrs(struct device hwdev, struct scatterlist sgl, int nelems,
160c1d8e	76	enum dma_data_direction dir, struct dma_attrs *attrs);
1648993f JR	77
	78	extern void
	79	swiotlb_unmap_sg_attrs(struct device hwdev, struct scatterlist sgl,
160c1d8e FT	80	int nelems, enum dma_data_direction dir,
160c1d8e FT	81	struct dma_attrs *attrs);
1648993f JR	82
	83	extern void
	84	swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e	85	size_t size, enum dma_data_direction dir);
1648993f JR	86
	87	extern void
	88	swiotlb_sync_sg_for_cpu(struct device hwdev, struct scatterlist sg,
160c1d8e	89	int nelems, enum dma_data_direction dir);
1648993f JR	90
	91	extern void
	92	swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e	93	size_t size, enum dma_data_direction dir);
1648993f JR	94
	95	extern void
	96	swiotlb_sync_sg_for_device(struct device hwdev, struct scatterlist sg,
160c1d8e	97	int nelems, enum dma_data_direction dir);
1648993f	98
1648993f JR	99	extern int
	100	swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
	101
	102	extern int
	103	swiotlb_dma_supported(struct device *hwdev, u64 mask);
	104
5740afdb FT	105	#ifdef CONFIG_SWIOTLB
	106	extern void __init swiotlb_free(void);
	107	#else
	108	static inline void swiotlb_free(void) { }
	109	#endif
	110
ad32e8cb	111	extern void swiotlb_print_info(void);
1648993f	112	#endif /* __LINUX_SWIOTLB_H */