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
|
/*
* Port on Texas Instruments TMS320C6x architecture
*
* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
* Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef _ASM_C6X_DMA_MAPPING_H
#define _ASM_C6X_DMA_MAPPING_H
#include <linux/dma-debug.h>
#include <asm-generic/dma-coherent.h>
#define dma_supported(d, m) 1
static inline int dma_set_mask(struct device *dev, u64 dma_mask)
{
if (!dev->dma_mask || !dma_supported(dev, dma_mask))
return -EIO;
*dev->dma_mask = dma_mask;
return 0;
}
/*
* DMA errors are defined by all-bits-set in the DMA address.
*/
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return dma_addr == ~0;
}
extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
size_t size, enum dma_data_direction dir);
extern void dma_unmap_single(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir);
extern int dma_map_sg(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction direction);
extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction direction);
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
dma_addr_t handle;
handle = dma_map_single(dev, page_address(page) + offset, size, dir);
debug_dma_map_page(dev, page, offset, size, dir, handle, false);
return handle;
}
static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
dma_unmap_single(dev, handle, size, dir);
debug_dma_unmap_page(dev, handle, size, dir, false);
}
extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir);
extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
size_t size,
enum dma_data_direction dir);
extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir);
extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir);
extern void coherent_mem_init(u32 start, u32 size);
extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent((d), (s), (h), (f))
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent((d), (s), (v), (h))
#endif /* _ASM_C6X_DMA_MAPPING_H */
|
