summaryrefslogtreecommitdiffstats
path: root/arch/ia64/include/asm/dma-mapping.h
blob: 36c0009dbece5d29d80ac8253edb64e6cd98867b (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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
#ifndef _ASM_IA64_DMA_MAPPING_H
#define _ASM_IA64_DMA_MAPPING_H

/*
 * Copyright (C) 2003-2004 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */
#include <asm/machvec.h>
#include <linux/scatterlist.h>
#include <asm/swiotlb.h>

#define ARCH_HAS_DMA_GET_REQUIRED_MASK

extern struct dma_map_ops *dma_ops;
extern struct ia64_machine_vector ia64_mv;
extern void set_iommu_machvec(void);

extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
				    enum dma_data_direction);
extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
				enum dma_data_direction);

static inline void *dma_alloc_coherent(struct device *dev, size_t size,
				       dma_addr_t *daddr, gfp_t gfp)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	return ops->alloc_coherent(dev, size, daddr, gfp);
}

static inline void dma_free_coherent(struct device *dev, size_t size,
				     void *caddr, dma_addr_t daddr)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	ops->free_coherent(dev, size, caddr, daddr);
}

#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)

static inline dma_addr_t dma_map_single_attrs(struct device *dev,
					      void *caddr, size_t size,
					      enum dma_data_direction dir,
					      struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	return ops->map_page(dev, virt_to_page(caddr),
			     (unsigned long)caddr & ~PAGE_MASK, size,
			     dir, attrs);
}

static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t daddr,
					  size_t size,
					  enum dma_data_direction dir,
					  struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	ops->unmap_page(dev, daddr, size, dir, attrs);
}

#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)

static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
				   int nents, enum dma_data_direction dir,
				   struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	return ops->map_sg(dev, sgl, nents, dir, attrs);
}

static inline void dma_unmap_sg_attrs(struct device *dev,
				      struct scatterlist *sgl, int nents,
				      enum dma_data_direction dir,
				      struct dma_attrs *attrs)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	ops->unmap_sg(dev, sgl, nents, dir, attrs);
}

#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)

static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t daddr,
					   size_t size,
					   enum dma_data_direction dir)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	ops->sync_single_for_cpu(dev, daddr, size, dir);
}

static inline void dma_sync_sg_for_cpu(struct device *dev,
				       struct scatterlist *sgl,
				       int nents, enum dma_data_direction dir)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	ops->sync_sg_for_cpu(dev, sgl, nents, dir);
}

static inline void dma_sync_single_for_device(struct device *dev,
					      dma_addr_t daddr,
					      size_t size,
					      enum dma_data_direction dir)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	ops->sync_single_for_device(dev, daddr, size, dir);
}

static inline void dma_sync_sg_for_device(struct device *dev,
					  struct scatterlist *sgl,
					  int nents,
					  enum dma_data_direction dir)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	ops->sync_sg_for_device(dev, sgl, nents, dir);
}

static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	return ops->mapping_error(dev, daddr);
}

static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
				      size_t offset, size_t size,
				      enum dma_data_direction dir)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	return ops->map_page(dev, page, offset, size, dir, NULL);
}

static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
				  size_t size, enum dma_data_direction dir)
{
	dma_unmap_single(dev, addr, size, dir);
}

/*
 * Rest of this file is part of the "Advanced DMA API".  Use at your own risk.
 * See Documentation/DMA-API.txt for details.
 */

#define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir)	\
	dma_sync_single_for_cpu(dev, dma_handle, size, dir)
#define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir)	\
	dma_sync_single_for_device(dev, dma_handle, size, dir)

static inline int dma_supported(struct device *dev, u64 mask)
{
	struct dma_map_ops *ops = platform_dma_get_ops(dev);
	return ops->dma_supported(dev, mask);
}

static inline int
dma_set_mask (struct device *dev, u64 mask)
{
	if (!dev->dma_mask || !dma_supported(dev, mask))
		return -EIO;
	*dev->dma_mask = mask;
	return 0;
}

extern int dma_get_cache_alignment(void);

static inline void
dma_cache_sync (struct device *dev, void *vaddr, size_t size,
	enum dma_data_direction dir)
{
	/*
	 * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
	 * ensure that dma_cache_sync() enforces order, hence the mb().
	 */
	mb();
}

#define dma_is_consistent(d, h)	(1)	/* all we do is coherent memory... */

#endif /* _ASM_IA64_DMA_MAPPING_H */
OpenPOWER on IntegriCloud