tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
fork
Configure Feed
Select the types of activity you want to include in your feed.
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
10extern int swiotlb_force;
11
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
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
25extern void swiotlb_init(int verbose);
26
27extern void
28*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
29 dma_addr_t *dma_handle, gfp_t flags);
30
31extern void
32swiotlb_free_coherent(struct device *hwdev, size_t size,
33 void *vaddr, dma_addr_t dma_handle);
34
35extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
36 unsigned long offset, size_t size,
37 enum dma_data_direction dir,
38 struct dma_attrs *attrs);
39extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
40 size_t size, enum dma_data_direction dir,
41 struct dma_attrs *attrs);
42
43extern int
44swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
45 int direction);
46
47extern void
48swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
49 int direction);
50
51extern int
52swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
53 enum dma_data_direction dir, struct dma_attrs *attrs);
54
55extern void
56swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
57 int nelems, enum dma_data_direction dir,
58 struct dma_attrs *attrs);
59
60extern void
61swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
62 size_t size, enum dma_data_direction dir);
63
64extern void
65swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
66 int nelems, enum dma_data_direction dir);
67
68extern void
69swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
70 size_t size, enum dma_data_direction dir);
71
72extern void
73swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
74 int nelems, enum dma_data_direction dir);
75
76extern void
77swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
78 unsigned long offset, size_t size,
79 enum dma_data_direction dir);
80
81extern void
82swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
83 unsigned long offset, size_t size,
84 enum dma_data_direction dir);
85
86extern int
87swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
88
89extern int
90swiotlb_dma_supported(struct device *hwdev, u64 mask);
91
92#ifdef CONFIG_SWIOTLB
93extern void __init swiotlb_free(void);
94#else
95static inline void swiotlb_free(void) { }
96#endif
97
98extern void swiotlb_print_info(void);
99#endif /* __LINUX_SWIOTLB_H */