[mirror_ubuntu-zesty-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;

/*
 * 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(void);

extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs);
extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);

extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
				      phys_addr_t address);
extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);

extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);

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,
	       int direction);

extern void
swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
		 int direction);

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 void
swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
				  unsigned long offset, size_t size,
				  enum dma_data_direction dir);

extern void
swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
				     unsigned long offset, size_t size,
				     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);

#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
0016fdee IC	10	/*
	11	* Maximum allowable number of contiguous slabs to map,
	12	* must be a power of 2. What is the appropriate value ?
	13	* The complexity of {map,unmap}_single is linearly dependent on this value.
	14	*/
	15	#define IO_TLB_SEGSIZE 128
	16
	17
	18	/*
	19	* log of the size of each IO TLB slab. The number of slabs is command line
	20	* controllable.
	21	*/
	22	#define IO_TLB_SHIFT 11
	23
1648993f JR	24	extern void
	25	swiotlb_init(void);
	26
8c5df16b JF	27	extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs);
	28	extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
	29
70a7d3cc JF	30	extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
70a7d3cc JF	31	phys_addr_t address);
e08e1f7a IC	32	extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
e08e1f7a IC	33
0b8698ab	34	extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
b81ea27b	35
1648993f JR	36	extern void
	37	swiotlb_alloc_coherent(struct device hwdev, size_t size,
	38	dma_addr_t *dma_handle, gfp_t flags);
	39
	40	extern void
	41	swiotlb_free_coherent(struct device *hwdev, size_t size,
	42	void *vaddr, dma_addr_t dma_handle);
	43
f98eee8e FT	44	extern dma_addr_t swiotlb_map_page(struct device dev, struct page page,
	45	unsigned long offset, size_t size,
	46	enum dma_data_direction dir,
	47	struct dma_attrs *attrs);
	48	extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
	49	size_t size, enum dma_data_direction dir,
	50	struct dma_attrs *attrs);
1648993f JR	51
	52	extern int
	53	swiotlb_map_sg(struct device hwdev, struct scatterlist sg, int nents,
	54	int direction);
	55
	56	extern void
	57	swiotlb_unmap_sg(struct device hwdev, struct scatterlist sg, int nents,
	58	int direction);
	59
	60	extern int
	61	swiotlb_map_sg_attrs(struct device hwdev, struct scatterlist sgl, int nelems,
160c1d8e	62	enum dma_data_direction dir, struct dma_attrs *attrs);
1648993f JR	63
	64	extern void
	65	swiotlb_unmap_sg_attrs(struct device hwdev, struct scatterlist sgl,
160c1d8e FT	66	int nelems, enum dma_data_direction dir,
160c1d8e FT	67	struct dma_attrs *attrs);
1648993f JR	68
	69	extern void
	70	swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e	71	size_t size, enum dma_data_direction dir);
1648993f JR	72
	73	extern void
	74	swiotlb_sync_sg_for_cpu(struct device hwdev, struct scatterlist sg,
160c1d8e	75	int nelems, enum dma_data_direction dir);
1648993f JR	76
	77	extern void
	78	swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e	79	size_t size, enum dma_data_direction dir);
1648993f JR	80
	81	extern void
	82	swiotlb_sync_sg_for_device(struct device hwdev, struct scatterlist sg,
160c1d8e	83	int nelems, enum dma_data_direction dir);
1648993f JR	84
	85	extern void
	86	swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e FT	87	unsigned long offset, size_t size,
160c1d8e FT	88	enum dma_data_direction dir);
1648993f JR	89
	90	extern void
	91	swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
	92	unsigned long offset, size_t size,
160c1d8e	93	enum dma_data_direction dir);
1648993f JR	94
	95	extern int
	96	swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
	97
	98	extern int
	99	swiotlb_dma_supported(struct device *hwdev, u64 mask);
	100
	101	#endif /* __LINUX_SWIOTLB_H */