[GitHub/mt8127/android_kernel_alcatel_ttab.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_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
0016fdee IC	17	/*
	18	* log of the size of each IO TLB slab. The number of slabs is command line
	19	* controllable.
	20	*/
	21	#define IO_TLB_SHIFT 11
	22
1648993f JR	23	extern void
	24	swiotlb_init(void);
	25
	26	extern void
	27	swiotlb_alloc_coherent(struct device hwdev, size_t size,
	28	dma_addr_t *dma_handle, gfp_t flags);
	29
	30	extern void
	31	swiotlb_free_coherent(struct device *hwdev, size_t size,
	32	void *vaddr, dma_addr_t dma_handle);
	33
f98eee8e FT	34	extern dma_addr_t swiotlb_map_page(struct device dev, struct page page,
	35	unsigned long offset, size_t size,
	36	enum dma_data_direction dir,
	37	struct dma_attrs *attrs);
	38	extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
	39	size_t size, enum dma_data_direction dir,
	40	struct dma_attrs *attrs);
1648993f JR	41
	42	extern int
	43	swiotlb_map_sg(struct device hwdev, struct scatterlist sg, int nents,
	44	int direction);
	45
	46	extern void
	47	swiotlb_unmap_sg(struct device hwdev, struct scatterlist sg, int nents,
	48	int direction);
	49
	50	extern int
	51	swiotlb_map_sg_attrs(struct device hwdev, struct scatterlist sgl, int nelems,
160c1d8e	52	enum dma_data_direction dir, struct dma_attrs *attrs);
1648993f JR	53
	54	extern void
	55	swiotlb_unmap_sg_attrs(struct device hwdev, struct scatterlist sgl,
160c1d8e FT	56	int nelems, enum dma_data_direction dir,
160c1d8e FT	57	struct dma_attrs *attrs);
1648993f JR	58
	59	extern void
	60	swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e	61	size_t size, enum dma_data_direction dir);
1648993f JR	62
	63	extern void
	64	swiotlb_sync_sg_for_cpu(struct device hwdev, struct scatterlist sg,
160c1d8e	65	int nelems, enum dma_data_direction dir);
1648993f JR	66
	67	extern void
	68	swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e	69	size_t size, enum dma_data_direction dir);
1648993f JR	70
	71	extern void
	72	swiotlb_sync_sg_for_device(struct device hwdev, struct scatterlist sg,
160c1d8e	73	int nelems, enum dma_data_direction dir);
1648993f JR	74
	75	extern void
	76	swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
160c1d8e FT	77	unsigned long offset, size_t size,
160c1d8e FT	78	enum dma_data_direction dir);
1648993f JR	79
	80	extern void
	81	swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
	82	unsigned long offset, size_t size,
160c1d8e	83	enum dma_data_direction dir);
1648993f JR	84
	85	extern int
	86	swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
	87
	88	extern int
	89	swiotlb_dma_supported(struct device *hwdev, u64 mask);
	90
	91	#endif /* __LINUX_SWIOTLB_H */