aboutsummaryrefslogtreecommitdiffstats
path: root/arch/microblaze/include/asm/dma-mapping.h
blob: 17336252a9b827932be864ba051c46603a8f8f7c (plain)
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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
/*
 * Copyright (C) 2006 Atmark Techno, Inc.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#ifndef _ASM_MICROBLAZE_DMA_MAPPING_H
#define _ASM_MICROBLAZE_DMA_MAPPING_H

#include <asm/cacheflush.h>
#include <linux/io.h>
#include <linux/bug.h>

struct scatterlist;

#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)

/* FIXME */
static inline int
dma_supported(struct device *dev, u64 mask)
{
	return 1;
}

static inline dma_addr_t
dma_map_page(struct device *dev, struct page *page,
	unsigned long offset, size_t size,
	enum dma_data_direction direction)
{
	BUG();
	return 0;
}

static inline void
dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
	enum dma_data_direction direction)
{
	BUG();
}

static inline int
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
	enum dma_data_direction direction)
{
	BUG();
	return 0;
}

static inline void
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
	enum dma_data_direction direction)
{
	BUG();
}

static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
			enum dma_data_direction direction)
{
	BUG();
}

static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
		size_t size, enum dma_data_direction direction)
{
	BUG();
}

static inline void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
		enum dma_data_direction direction)
{
	BUG();
}

static inline void
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
		enum dma_data_direction direction)
{
	BUG();
}

static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
	return 0;
}

static inline void *dma_alloc_coherent(struct device *dev, size_t size,
				dma_addr_t *dma_handle, int flag)
{
	return NULL; /* consistent_alloc(flag, size, dma_handle); */
}

static inline void dma_free_coherent(struct device *dev, size_t size,
			void *vaddr, dma_addr_t dma_handle)
{
	BUG();
}

static inline dma_addr_t
dma_map_single(struct device *dev, void *ptr, size_t size,
	enum dma_data_direction direction)
{
	BUG_ON(direction == DMA_NONE);

	return virt_to_bus(ptr);
}

static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
				    size_t size,
				    enum dma_data_direction direction)
{
	switch (direction) {
	case DMA_FROM_DEVICE:
		flush_dcache_range((unsigned)dma_addr,
			(unsigned)dma_addr + size);
			/* Fall through */
	case DMA_TO_DEVICE:
		break;
	default:
		BUG();
	}
}

#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */