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gerrit-public.fairphone.software / kernel / msm-4.9 / f98eee8ea99fe74ee9c4e867ba178ec3072793be / . / include / linux / swiotlb.h
blob: 493dc17e7c87b123622c870c72f3ef7604c2569e [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
Jeremy Fitzhardinge70a7d3c2008-12-22 10:26:05 -0800[diff] [blame]30extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
31 phys_addr_t address);
Ian Campbelle08e1f72008-12-16 12:17:30 -0800[diff] [blame]32extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
33
Ian Campbellb81ea272008-12-16 12:17:31 -0800[diff] [blame]34extern int swiotlb_arch_range_needs_mapping(void *ptr, size_t size);
35
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]36extern void
37*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
38 dma_addr_t *dma_handle, gfp_t flags);
39
40extern void
41swiotlb_free_coherent(struct device *hwdev, size_t size,
42 void *vaddr, dma_addr_t dma_handle);
43
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame^]44extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
45 unsigned long offset, size_t size,
46 enum dma_data_direction dir,
47 struct dma_attrs *attrs);
48extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
49 size_t size, enum dma_data_direction dir,
50 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]51
52extern int
53swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
54 int direction);
55
56extern void
57swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
58 int direction);
59
60extern int
61swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]62 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]63
64extern void
65swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]66 int nelems, enum dma_data_direction dir,
67 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]68
69extern void
70swiotlb_sync_single_for_cpu(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_cpu(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
77extern void
78swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]79 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]80
81extern void
82swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]83 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]84
85extern void
86swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]87 unsigned long offset, size_t size,
88 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]89
90extern void
91swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
92 unsigned long offset, size_t size,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]93 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]94
95extern int
96swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
97
98extern int
99swiotlb_dma_supported(struct device *hwdev, u64 mask);
100
101#endif /* __LINUX_SWIOTLB_H */