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gerrit-public.fairphone.software / kernel / msm-4.9 / abbceff7d7a884968e876e52578da1db4a4f6b54 / . / include / linux / swiotlb.h
blob: b406261d88871206742d827d38772941ebfa6a32 [file] [log] [blame]
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]1#ifndef __LINUX_SWIOTLB_H
2#define __LINUX_SWIOTLB_H
3
4#include <linux/types.h>
5
6struct device;
7struct dma_attrs;
8struct scatterlist;
9
FUJITA Tomonori69594502009-11-14 20:46:38 +0900[diff] [blame]10extern int swiotlb_force;
11
Ian Campbell0016fde2008-12-16 12:17:27 -0800[diff] [blame]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
Ian Campbell0016fde2008-12-16 12:17:27 -0800[diff] [blame]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
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]25extern void swiotlb_init(int verbose);
FUJITA Tomonoriabbceff2010-05-10 15:15:12 -0400[diff] [blame^]26extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]27
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]28extern void
29*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
30 dma_addr_t *dma_handle, gfp_t flags);
31
32extern void
33swiotlb_free_coherent(struct device *hwdev, size_t size,
34 void *vaddr, dma_addr_t dma_handle);
35
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]36extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
37 unsigned long offset, size_t size,
38 enum dma_data_direction dir,
39 struct dma_attrs *attrs);
40extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
41 size_t size, enum dma_data_direction dir,
42 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]43
44extern int
45swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
46 int direction);
47
48extern void
49swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
50 int direction);
51
52extern int
53swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]54 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]55
56extern void
57swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]58 int nelems, enum dma_data_direction dir,
59 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]60
61extern void
62swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]63 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]64
65extern void
66swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]67 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]68
69extern void
70swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]71 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]72
73extern void
74swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]75 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]76
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]77extern int
78swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
79
80extern int
81swiotlb_dma_supported(struct device *hwdev, u64 mask);
82
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame]83#ifdef CONFIG_SWIOTLB
84extern void __init swiotlb_free(void);
85#else
86static inline void swiotlb_free(void) { }
87#endif
88
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]89extern void swiotlb_print_info(void);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]90#endif /* __LINUX_SWIOTLB_H */