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gerrit-public.fairphone.software / kernel / msm-5.4 / 74838b75379a53678ffc5f59de86161d21e2c808 / . / include / linux / swiotlb.h
blob: 8d08b3ed406db688c6fa8c1cfe10d921870d2e72 [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};
37extern void *swiotlb_tbl_map_single(struct device *hwdev, dma_addr_t tbl_dma_addr,
38 phys_addr_t phys, size_t size,
39 enum dma_data_direction dir);
40
41extern void swiotlb_tbl_unmap_single(struct device *hwdev, char *dma_addr,
42 size_t size, enum dma_data_direction dir);
43
44extern void swiotlb_tbl_sync_single(struct device *hwdev, char *dma_addr,
45 size_t size, enum dma_data_direction dir,
46 enum dma_sync_target target);
47
48/* Accessory functions. */
49extern void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
50 enum dma_data_direction dir);
51
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]52extern void
53*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
54 dma_addr_t *dma_handle, gfp_t flags);
55
56extern void
57swiotlb_free_coherent(struct device *hwdev, size_t size,
58 void *vaddr, dma_addr_t dma_handle);
59
FUJITA Tomonorif98eee82009-01-05 23:59:03 +0900[diff] [blame]60extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
61 unsigned long offset, size_t size,
62 enum dma_data_direction dir,
63 struct dma_attrs *attrs);
64extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
65 size_t size, enum dma_data_direction dir,
66 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]67
68extern int
69swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
Konrad Rzeszutek Wilk22d48262010-05-10 15:01:15 -0500[diff] [blame]70 enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]71
72extern void
73swiotlb_unmap_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 int
77swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]78 enum dma_data_direction dir, struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]79
80extern void
81swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]82 int nelems, enum dma_data_direction dir,
83 struct dma_attrs *attrs);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]84
85extern void
86swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]87 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]88
89extern void
90swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]91 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]92
93extern void
94swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]95 size_t size, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]96
97extern void
98swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
FUJITA Tomonori160c1d82009-01-05 23:59:02 +0900[diff] [blame]99 int nelems, enum dma_data_direction dir);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]100
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]101extern int
102swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
103
104extern int
105swiotlb_dma_supported(struct device *hwdev, u64 mask);
106
FUJITA Tomonori5740afd2009-11-10 19:46:18 +0900[diff] [blame]107#ifdef CONFIG_SWIOTLB
108extern void __init swiotlb_free(void);
109#else
110static inline void swiotlb_free(void) { }
111#endif
112
FUJITA Tomonoriad32e8c2009-11-10 19:46:19 +0900[diff] [blame]113extern void swiotlb_print_info(void);
Joerg Roedel16489932008-10-15 22:01:03 -0700[diff] [blame]114#endif /* __LINUX_SWIOTLB_H */