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gerrit-public.fairphone.software / kernel / msm-4.9 / ad32e8cb86e7894aac51c8963eaa9f36bb8a4e14 / . / include / linux / swiotlb.h
blob: eb9bdb4d4854d6d12101c9d645a7bbdf691f02aa [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
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame^]23extern void swiotlb_init(int verbose);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]24
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]25extern void
26*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
27 dma_addr_t *dma_handle, gfp_t flags);
28
29extern void
30swiotlb_free_coherent(struct device *hwdev, size_t size,
31 void *vaddr, dma_addr_t dma_handle);
32
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]33extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
34 unsigned long offset, size_t size,
35 enum dma_data_direction dir,
36 struct dma_attrs *attrs);
37extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
38 size_t size, enum dma_data_direction dir,
39 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]40
41extern int
42swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
43 int direction);
44
45extern void
46swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
47 int direction);
48
49extern int
50swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]51 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]52
53extern void
54swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]55 int nelems, enum dma_data_direction dir,
56 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]57
58extern void
59swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]60 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]61
62extern void
63swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]64 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]65
66extern void
67swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]68 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]69
70extern void
71swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]72 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]73
74extern void
75swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]76 unsigned long offset, size_t size,
77 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]78
79extern void
80swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
81 unsigned long offset, size_t size,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]82 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]83
84extern int
85swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
86
87extern int
88swiotlb_dma_supported(struct device *hwdev, u64 mask);
89
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame]90#ifdef CONFIG_SWIOTLB
91extern void __init swiotlb_free(void);
92#else
93static inline void swiotlb_free(void) { }
94#endif
95
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame^]96extern void swiotlb_print_info(void);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]97#endif /* __LINUX_SWIOTLB_H */