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gerrit-public.fairphone.software / kernel / msm-4.9 / c8a7972c3b3633bf90daf50b135665d8ca4838c4 / . / include / linux / swiotlb.h
blob: 8c0e349f4a6cb83f616f1d0046c1db7ab504d531 [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);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]27
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]28/*
29 * Enumeration for sync targets
30 */
31enum dma_sync_target {
32 SYNC_FOR_CPU = 0,
33 SYNC_FOR_DEVICE = 1,
34};
35extern void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr,
36 phys_addr_t phys, size_t size,
37 enum dma_data_direction dir);
38
39extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr,
40 size_t size, enum dma_data_direction dir);
41
42extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr,
43 size_t size, enum dma_data_direction dir,
44 enum dma_sync_target target);
45
46/* Accessory functions. */
47extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
48 enum dma_data_direction dir);
49
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]50extern void
51*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
52 dma_addr_t *dma_handle, gfp_t flags);
53
54extern void
55swiotlb_free_coherent(struct device *hwdev, size_t size,
56 void *vaddr, dma_addr_t dma_handle);
57
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]58extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
59 unsigned long offset, size_t size,
60 enum dma_data_direction dir,
61 struct dma_attrs *attrs);
62extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
63 size_t size, enum dma_data_direction dir,
64 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]65
66extern int
67swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -0500[diff] [blame]68 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]69
70extern void
71swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -0500[diff] [blame]72 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]73
74extern int
75swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]76 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]77
78extern void
79swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]80 int nelems, enum dma_data_direction dir,
81 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]82
83extern void
84swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]85 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]86
87extern void
88swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]89 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]90
91extern void
92swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]93 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]94
95extern void
96swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]97 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]98
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]99extern int
100swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
101
102extern int
103swiotlb_dma_supported(struct device *hwdev, u64 mask);
104
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame]105#ifdef CONFIG_SWIOTLB
106extern void __init swiotlb_free(void);
107#else
108static inline void swiotlb_free(void) { }
109#endif
110
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]111extern void swiotlb_print_info(void);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]112#endif /* __LINUX_SWIOTLB_H */