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gerrit-public.fairphone.software / kernel / msm-4.9 / e08e1f7adba522378e8d2ae941bf25443866136d / . / include / linux / swiotlb.h
blob: 694f1839cbc05b62eb0bc426092bc004759ce29f [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
17
18/*
19 * log of the size of each IO TLB slab. The number of slabs is command line
20 * controllable.
21 */
22#define IO_TLB_SHIFT 11
23
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]24extern void
25swiotlb_init(void);
26
Jeremy Fitzhardinge8c5df162008-12-16 12:17:26 -0800[diff] [blame]27extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs);
28extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
29
Ian Campbelle08e1f72008-12-16 12:17:30 -0800[diff] [blame^]30extern dma_addr_t swiotlb_phys_to_bus(phys_addr_t address);
31extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
32
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]33extern void
34*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
35 dma_addr_t *dma_handle, gfp_t flags);
36
37extern void
38swiotlb_free_coherent(struct device *hwdev, size_t size,
39 void *vaddr, dma_addr_t dma_handle);
40
41extern dma_addr_t
42swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir);
43
44extern void
45swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
46 size_t size, int dir);
47
48extern dma_addr_t
49swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
50 int dir, struct dma_attrs *attrs);
51
52extern void
53swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
54 size_t size, int dir, struct dma_attrs *attrs);
55
56extern int
57swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
58 int direction);
59
60extern void
61swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
62 int direction);
63
64extern int
65swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
66 int dir, struct dma_attrs *attrs);
67
68extern void
69swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
70 int nelems, int dir, struct dma_attrs *attrs);
71
72extern void
73swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
74 size_t size, int dir);
75
76extern void
77swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
78 int nelems, int dir);
79
80extern void
81swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
82 size_t size, int dir);
83
84extern void
85swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
86 int nelems, int dir);
87
88extern void
89swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
90 unsigned long offset, size_t size, int dir);
91
92extern void
93swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
94 unsigned long offset, size_t size,
95 int dir);
96
97extern int
98swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
99
100extern int
101swiotlb_dma_supported(struct device *hwdev, u64 mask);
102
103#endif /* __LINUX_SWIOTLB_H */