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gerrit-public.fairphone.software / kernel / msm-4.9 / 70c7c9c4438fc3ca573744c5448df90dbcc5e159 / . / include / linux / swiotlb.h
blob: 81a4e213c6cf9bd934792d0135836cc9ef8d4d36 [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);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]26
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]27extern void
28*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
29 dma_addr_t *dma_handle, gfp_t flags);
30
31extern void
32swiotlb_free_coherent(struct device *hwdev, size_t size,
33 void *vaddr, dma_addr_t dma_handle);
34
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]35extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
36 unsigned long offset, size_t size,
37 enum dma_data_direction dir,
38 struct dma_attrs *attrs);
39extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
40 size_t size, enum dma_data_direction dir,
41 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]42
43extern int
44swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
45 int direction);
46
47extern void
48swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
49 int direction);
50
51extern int
52swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]53 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]54
55extern void
56swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]57 int nelems, enum dma_data_direction dir,
58 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]59
60extern void
61swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]62 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]63
64extern void
65swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]66 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]67
68extern void
69swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]70 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]71
72extern void
73swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]74 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]75
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]76extern int
77swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
78
79extern int
80swiotlb_dma_supported(struct device *hwdev, u64 mask);
81
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame]82#ifdef CONFIG_SWIOTLB
83extern void __init swiotlb_free(void);
84#else
85static inline void swiotlb_free(void) { }
86#endif
87
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]88extern void swiotlb_print_info(void);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]89#endif /* __LINUX_SWIOTLB_H */