[linux-2.6-block.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);
int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
extern unsigned long swiotlb_nr_tbl(void);
unsigned long swiotlb_size_or_default(void);
extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);

/*
 * Enumeration for sync targets
 */
enum dma_sync_target {
	SYNC_FOR_CPU = 0,
	SYNC_FOR_DEVICE = 1,
};

/* define the last possible byte of physical address space as a mapping error */
#define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0)

extern phys_addr_t 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,
				     phys_addr_t tlb_addr,
				     size_t size, enum dma_data_direction dir);

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

/* Accessory functions. */
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);
extern int is_swiotlb_buffer(phys_addr_t paddr);

#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);
ac2cbab2	26	int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
f21ffe9f	27	extern unsigned long swiotlb_nr_tbl(void);
c729de8f	28	unsigned long swiotlb_size_or_default(void);
74838b75	29	extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);
1648993f	30
d7ef1533 KRW	31	/*
	32	* Enumeration for sync targets
	33	*/
	34	enum dma_sync_target {
	35	SYNC_FOR_CPU = 0,
	36	SYNC_FOR_DEVICE = 1,
	37	};
e05ed4d1 AD	38
	39	/* define the last possible byte of physical address space as a mapping error */
	40	#define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0)
	41
	42	extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
	43	dma_addr_t tbl_dma_addr,
	44	phys_addr_t phys, size_t size,
	45	enum dma_data_direction dir);
d7ef1533	46
61ca08c3 AD	47	extern void swiotlb_tbl_unmap_single(struct device *hwdev,
61ca08c3 AD	48	phys_addr_t tlb_addr,
d7ef1533 KRW	49	size_t size, enum dma_data_direction dir);
d7ef1533 KRW	50
fbfda893 AD	51	extern void swiotlb_tbl_sync_single(struct device *hwdev,
fbfda893 AD	52	phys_addr_t tlb_addr,
d7ef1533 KRW	53	size_t size, enum dma_data_direction dir,
	54	enum dma_sync_target target);
	55
	56	/* Accessory functions. */
1648993f JR	57	extern void
	58	swiotlb_alloc_coherent(struct device hwdev, size_t size,
	59	dma_addr_t *dma_handle, gfp_t flags);
	60
	61	extern void
	62	swiotlb_free_coherent(struct device *hwdev, size_t size,
	63	void *vaddr, dma_addr_t dma_handle);
	64
f98eee8e FT	65	extern dma_addr_t swiotlb_map_page(struct device dev, struct page page,
	66	unsigned long offset, size_t size,
	67	enum dma_data_direction dir,
	68	struct dma_attrs *attrs);
	69	extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
	70	size_t size, enum dma_data_direction dir,
	71	struct dma_attrs *attrs);
1648993f JR	72
	73	extern int
	74	swiotlb_map_sg(struct device hwdev, struct scatterlist sg, int nents,
22d48269	75	enum dma_data_direction dir);
1648993f JR	76
	77	extern void
	78	swiotlb_unmap_sg(struct device hwdev, struct scatterlist sg, int nents,
22d48269	79	enum dma_data_direction dir);
1648993f JR	80
	81	extern int
	82	swiotlb_map_sg_attrs(struct device hwdev, struct scatterlist sgl, int nelems,
160c1d8e	83	enum dma_data_direction dir, struct dma_attrs *attrs);
1648993f JR	84
	85	extern void
	86	swiotlb_unmap_sg_attrs(struct device hwdev, struct scatterlist sgl,
160c1d8e FT	87	int nelems, enum dma_data_direction dir,
160c1d8e FT	88	struct dma_attrs *attrs);
1648993f JR	89
	90	extern void
	91	swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e	92	size_t size, enum dma_data_direction dir);
1648993f JR	93
	94	extern void
	95	swiotlb_sync_sg_for_cpu(struct device hwdev, struct scatterlist sg,
160c1d8e	96	int nelems, enum dma_data_direction dir);
1648993f JR	97
	98	extern void
	99	swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e	100	size_t size, enum dma_data_direction dir);
1648993f JR	101
	102	extern void
	103	swiotlb_sync_sg_for_device(struct device hwdev, struct scatterlist sg,
160c1d8e	104	int nelems, enum dma_data_direction dir);
1648993f	105
1648993f JR	106	extern int
	107	swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
	108
	109	extern int
	110	swiotlb_dma_supported(struct device *hwdev, u64 mask);
	111
5740afdb FT	112	#ifdef CONFIG_SWIOTLB
	113	extern void __init swiotlb_free(void);
	114	#else
	115	static inline void swiotlb_free(void) { }
	116	#endif
	117
ad32e8cb	118	extern void swiotlb_print_info(void);
9c5a3621 AM	119	extern int is_swiotlb_buffer(phys_addr_t paddr);
9c5a3621 AM	120
1648993f	121	#endif /* __LINUX_SWIOTLB_H */