1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _LINUX_MSM_DMA_IOMMU_MAPPING_H
#define _LINUX_MSM_DMA_IOMMU_MAPPING_H
#include <linux/device.h>
#include <linux/dma-buf.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
#ifdef CONFIG_IOMMU_API
/*
* This function is not taking a reference to the dma_buf here. It is expected
* that clients hold reference to the dma_buf until they are done with mapping
* and unmapping.
*/
int msm_dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir, struct dma_buf *dma_buf,
struct dma_attrs *attrs);
static inline int msm_dma_map_sg_lazy(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir,
struct dma_buf *dma_buf)
{
return msm_dma_map_sg_attrs(dev, sg, nents, dir, dma_buf, NULL);
}
static inline int msm_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir,
struct dma_buf *dma_buf)
{
DEFINE_DMA_ATTRS(attrs);
init_dma_attrs(&attrs);
dma_set_attr(DMA_ATTR_NO_DELAYED_UNMAP, &attrs);
return msm_dma_map_sg_attrs(dev, sg, nents, dir, dma_buf, &attrs);
}
void msm_dma_unmap_sg(struct device *dev, struct scatterlist *sgl, int nents,
enum dma_data_direction dir, struct dma_buf *dma_buf);
int msm_dma_unmap_all_for_dev(struct device *dev);
/*
* Below is private function only to be called by framework (ION) and not by
* clients.
*/
void msm_dma_buf_freed(void *buffer);
#else /*CONFIG_IOMMU_API*/
static inline int msm_dma_map_sg_attrs(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir, struct dma_buf *dma_buf,
struct dma_attrs *attr)
{
return -EINVAL;
}
static inline int msm_dma_map_sg_lazy(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir,
struct dma_buf *dma_buf)
{
return -EINVAL;
}
static inline int msm_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir,
struct dma_buf *dma_buf)
{
return -EINVAL;
}
static inline void msm_dma_unmap_sg(struct device *dev,
struct scatterlist *sgl, int nents,
enum dma_data_direction dir,
struct dma_buf *dma_buf)
{
}
static inline int msm_dma_unmap_all_for_dev(struct device *dev)
{
return 0;
}
static inline void msm_dma_buf_freed(void *buffer) {}
#endif /*CONFIG_IOMMU_API*/
#endif
|
