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gerrit-public.fairphone.software / kernel / msm-4.9 / 23fc09ee09c3b8f904a2220c7f71b2ff04e91219 / . / include / linux / swiotlb.h
blob: 071d62c214a6e0b0cb91e3022513c45169d06a6b [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);
Konrad Rzeszutek Wilk74838b72012-07-27 20:55:27 -0400[diff] [blame]28extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]29
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]30/*
31 * Enumeration for sync targets
32 */
33enum dma_sync_target {
34 SYNC_FOR_CPU = 0,
35 SYNC_FOR_DEVICE = 1,
36};
Alexander Duycke05ed4d2012-10-15 10:19:39 -0700[diff] [blame]37
38/* define the last possible byte of physical address space as a mapping error */
39#define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0)
40
41extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
42 dma_addr_t tbl_dma_addr,
43 phys_addr_t phys, size_t size,
44 enum dma_data_direction dir);
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]45
Alexander Duyck61ca08c2012-10-15 10:19:44 -0700[diff] [blame]46extern void swiotlb_tbl_unmap_single(struct device *hwdev,
47 phys_addr_t tlb_addr,
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]48 size_t size, enum dma_data_direction dir);
49
Alexander Duyckfbfda892012-10-15 10:19:49 -0700[diff] [blame]50extern void swiotlb_tbl_sync_single(struct device *hwdev,
51 phys_addr_t tlb_addr,
Konrad Rzeszutek Wilkd7ef1532010-05-28 11:37:10 -0400[diff] [blame]52 size_t size, enum dma_data_direction dir,
53 enum dma_sync_target target);
54
55/* Accessory functions. */
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]56extern void
57*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
58 dma_addr_t *dma_handle, gfp_t flags);
59
60extern void
61swiotlb_free_coherent(struct device *hwdev, size_t size,
62 void *vaddr, dma_addr_t dma_handle);
63
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]64extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
65 unsigned long offset, size_t size,
66 enum dma_data_direction dir,
67 struct dma_attrs *attrs);
68extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
69 size_t size, enum dma_data_direction dir,
70 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]71
72extern int
73swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -0500[diff] [blame]74 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]75
76extern void
77swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -0500[diff] [blame]78 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]79
80extern int
81swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]82 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]83
84extern void
85swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]86 int nelems, enum dma_data_direction dir,
87 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]88
89extern void
90swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]91 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]92
93extern void
94swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]95 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]96
97extern void
98swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]99 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]100
101extern void
102swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]103 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]104
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]105extern int
106swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
107
108extern int
109swiotlb_dma_supported(struct device *hwdev, u64 mask);
110
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame]111#ifdef CONFIG_SWIOTLB
112extern void __init swiotlb_free(void);
113#else
114static inline void swiotlb_free(void) { }
115#endif
116
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]117extern void swiotlb_print_info(void);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]118#endif /* __LINUX_SWIOTLB_H */