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Glauber Costa6f536632008-03-25 18:36:20 -03001#ifndef _ASM_DMA_MAPPING_H_
2#define _ASM_DMA_MAPPING_H_
3
4/*
5 * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
6 * documentation.
7 */
8
9#include <linux/scatterlist.h>
10#include <asm/io.h>
11#include <asm/swiotlb.h>
12
13struct dma_mapping_ops {
14 int (*mapping_error)(dma_addr_t dma_addr);
15 void* (*alloc_coherent)(struct device *dev, size_t size,
16 dma_addr_t *dma_handle, gfp_t gfp);
17 void (*free_coherent)(struct device *dev, size_t size,
18 void *vaddr, dma_addr_t dma_handle);
19 dma_addr_t (*map_single)(struct device *hwdev, void *ptr,
20 size_t size, int direction);
21 /* like map_single, but doesn't check the device mask */
22 dma_addr_t (*map_simple)(struct device *hwdev, char *ptr,
23 size_t size, int direction);
24 void (*unmap_single)(struct device *dev, dma_addr_t addr,
25 size_t size, int direction);
26 void (*sync_single_for_cpu)(struct device *hwdev,
27 dma_addr_t dma_handle, size_t size,
28 int direction);
29 void (*sync_single_for_device)(struct device *hwdev,
30 dma_addr_t dma_handle, size_t size,
31 int direction);
32 void (*sync_single_range_for_cpu)(struct device *hwdev,
33 dma_addr_t dma_handle, unsigned long offset,
34 size_t size, int direction);
35 void (*sync_single_range_for_device)(struct device *hwdev,
36 dma_addr_t dma_handle, unsigned long offset,
37 size_t size, int direction);
38 void (*sync_sg_for_cpu)(struct device *hwdev,
39 struct scatterlist *sg, int nelems,
40 int direction);
41 void (*sync_sg_for_device)(struct device *hwdev,
42 struct scatterlist *sg, int nelems,
43 int direction);
44 int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
45 int nents, int direction);
46 void (*unmap_sg)(struct device *hwdev,
47 struct scatterlist *sg, int nents,
48 int direction);
49 int (*dma_supported)(struct device *hwdev, u64 mask);
50 int is_phys;
51};
52
Glauber Costa22456b92008-03-25 18:36:21 -030053extern const struct dma_mapping_ops *dma_ops;
54
Thomas Gleixner96a388d2007-10-11 11:20:03 +020055#ifdef CONFIG_X86_32
56# include "dma-mapping_32.h"
57#else
58# include "dma-mapping_64.h"
59#endif
Glauber Costa6f536632008-03-25 18:36:20 -030060
Glauber Costa22456b92008-03-25 18:36:21 -030061static inline dma_addr_t
62dma_map_single(struct device *hwdev, void *ptr, size_t size,
63 int direction)
64{
65 BUG_ON(!valid_dma_direction(direction));
66 return dma_ops->map_single(hwdev, ptr, size, direction);
67}
68
Glauber Costa0cb0ae62008-03-25 18:36:22 -030069static inline void
70dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
71 int direction)
72{
73 BUG_ON(!valid_dma_direction(direction));
74 if (dma_ops->unmap_single)
75 dma_ops->unmap_single(dev, addr, size, direction);
76}
77
Glauber Costa16a3ce92008-03-25 18:36:23 -030078static inline int
79dma_map_sg(struct device *hwdev, struct scatterlist *sg,
80 int nents, int direction)
81{
82 BUG_ON(!valid_dma_direction(direction));
83 return dma_ops->map_sg(hwdev, sg, nents, direction);
84}
Glauber Costa6f536632008-03-25 18:36:20 -030085#endif