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gerrit-public.fairphone.software / kernel / msm-4.9 / 160c1d8e40866edfeae7d68816b7005d70acf391 / . / include / linux / swiotlb.h
blob: 0567c3d8633bf5d4c1fcc1601983a972109838ed [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
44extern dma_addr_t
45swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir);
46
47extern void
48swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
49 size_t size, int dir);
50
51extern dma_addr_t
52swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
53 int dir, struct dma_attrs *attrs);
54
55extern void
56swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
57 size_t size, int dir, struct dma_attrs *attrs);
58
59extern int
60swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
61 int direction);
62
63extern void
64swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
65 int direction);
66
67extern int
68swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame^]69 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]70
71extern void
72swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame^]73 int nelems, enum dma_data_direction dir,
74 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]75
76extern void
77swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame^]78 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]79
80extern void
81swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame^]82 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]83
84extern void
85swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame^]86 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]87
88extern void
89swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame^]90 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]91
92extern void
93swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame^]94 unsigned long offset, size_t size,
95 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]96
97extern void
98swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
99 unsigned long offset, size_t size,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame^]100 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]101
102extern int
103swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
104
105extern int
106swiotlb_dma_supported(struct device *hwdev, u64 mask);
107
108#endif /* __LINUX_SWIOTLB_H */