Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.9 / b38c77d82e42f4e72c162f49ea75f0f0ad76f1b6 / . / include / linux / swiotlb.h
blob: e872526fdc5fbb371ca0e420a961aec4738fdfa2 [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);
FUJITA Tomonoriabbceff2010-05-10 15:15:12 -0400[diff] [blame]26extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
Konrad Rzeszutek Wilkf21ffe92011-08-11 16:50:56 -0400[diff] [blame]27extern unsigned long swiotlb_nr_tbl(void);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]28
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]29/*
30 * Enumeration for sync targets
31 */
32enum dma_sync_target {
33 SYNC_FOR_CPU = 0,
34 SYNC_FOR_DEVICE = 1,
35};
36extern void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr,
37 phys_addr_t phys, size_t size,
38 enum dma_data_direction dir);
39
40extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr,
41 size_t size, enum dma_data_direction dir);
42
43extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr,
44 size_t size, enum dma_data_direction dir,
45 enum dma_sync_target target);
46
47/* Accessory functions. */
48extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
49 enum dma_data_direction dir);
50
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]51extern void
52*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
53 dma_addr_t *dma_handle, gfp_t flags);
54
55extern void
56swiotlb_free_coherent(struct device *hwdev, size_t size,
57 void *vaddr, dma_addr_t dma_handle);
58
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]59extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
60 unsigned long offset, size_t size,
61 enum dma_data_direction dir,
62 struct dma_attrs *attrs);
63extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
64 size_t size, enum dma_data_direction dir,
65 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]66
67extern int
68swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -0500[diff] [blame]69 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]70
71extern void
72swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -0500[diff] [blame]73 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]74
75extern int
76swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]77 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]78
79extern void
80swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]81 int nelems, enum dma_data_direction dir,
82 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]83
84extern void
85swiotlb_sync_single_for_cpu(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_cpu(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_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]94 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]95
96extern void
97swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]98 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]99
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]100extern int
101swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
102
103extern int
104swiotlb_dma_supported(struct device *hwdev, u64 mask);
105
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame]106#ifdef CONFIG_SWIOTLB
107extern void __init swiotlb_free(void);
108#else
109static inline void swiotlb_free(void) { }
110#endif
111
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]112extern void swiotlb_print_info(void);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]113#endif /* __LINUX_SWIOTLB_H */