Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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
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
24extern void
25swiotlb_init(void);
26
27extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs);
28extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
29
30extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
31 phys_addr_t address);
32extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
33
34extern int swiotlb_arch_range_needs_mapping(void *ptr, size_t size);
35
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,
69 int dir, struct dma_attrs *attrs);
70
71extern void
72swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
73 int nelems, int dir, struct dma_attrs *attrs);
74
75extern void
76swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
77 size_t size, int dir);
78
79extern void
80swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
81 int nelems, int dir);
82
83extern void
84swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
85 size_t size, int dir);
86
87extern void
88swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
89 int nelems, int dir);
90
91extern void
92swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
93 unsigned long offset, size_t size, int dir);
94
95extern void
96swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
97 unsigned long offset, size_t size,
98 int dir);
99
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
106#endif /* __LINUX_SWIOTLB_H */