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gerrit-public.fairphone.software / kernel / msm-4.9 / 5740afdb68abadc473fd5392df733558a58c1254 / . / include / linux / swiotlb.h
blob: 59bafa6902907dbfc570b9ea0ce107fcc2e20163 [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
Ian Campbell0016fde2008-12-16 12:17:27 -0800[diff] [blame]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
Ian Campbell0016fde2008-12-16 12:17:27 -0800[diff] [blame]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
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]23extern void
24swiotlb_init(void);
25
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]26extern void
27*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
28 dma_addr_t *dma_handle, gfp_t flags);
29
30extern void
31swiotlb_free_coherent(struct device *hwdev, size_t size,
32 void *vaddr, dma_addr_t dma_handle);
33
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]34extern 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);
38extern 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);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]41
42extern int
43swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
44 int direction);
45
46extern void
47swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
48 int direction);
49
50extern int
51swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]52 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]53
54extern void
55swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]56 int nelems, enum dma_data_direction dir,
57 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]58
59extern void
60swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]61 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]62
63extern void
64swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]65 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]66
67extern void
68swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]69 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]70
71extern void
72swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]73 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]74
75extern void
76swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]77 unsigned long offset, size_t size,
78 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]79
80extern void
81swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
82 unsigned long offset, size_t size,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]83 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]84
85extern int
86swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
87
88extern int
89swiotlb_dma_supported(struct device *hwdev, u64 mask);
90
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame^]91#ifdef CONFIG_SWIOTLB
92extern void __init swiotlb_free(void);
93#else
94static inline void swiotlb_free(void) { }
95#endif
96
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]97#endif /* __LINUX_SWIOTLB_H */