[mirror_ubuntu-bionic-kernel.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);
extern unsigned long swiotlb_nr_tbl(void);

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