aboutsummaryrefslogtreecommitdiff
path: root/arch/sparc/kernel/dma.c
blob: 3c9ff4f8af3a65980785905f4d1f9ff61a64e00a (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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
/* dma.c: PCI and SBUS DMA accessors for 32-bit sparc.
 *
 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <linux/mm.h>

#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif

#include "dma.h"

int dma_supported(struct device *dev, u64 mask)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type)
		return pci_dma_supported(to_pci_dev(dev), mask);
#endif
	return 0;
}
EXPORT_SYMBOL(dma_supported);

int dma_set_mask(struct device *dev, u64 dma_mask)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type)
		return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
#endif
	return -EOPNOTSUPP;
}
EXPORT_SYMBOL(dma_set_mask);

void *dma_alloc_coherent(struct device *dev, size_t size,
			 dma_addr_t *dma_handle, gfp_t flag)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type)
		return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
#endif
	return sbus_alloc_consistent(dev, size, dma_handle);
}
EXPORT_SYMBOL(dma_alloc_coherent);

void dma_free_coherent(struct device *dev, size_t size,
		       void *cpu_addr, dma_addr_t dma_handle)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type) {
		pci_free_consistent(to_pci_dev(dev), size,
				    cpu_addr, dma_handle);
		return;
	}
#endif
	sbus_free_consistent(dev, size, cpu_addr, dma_handle);
}
EXPORT_SYMBOL(dma_free_coherent);

dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
			  size_t size, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type)
		return pci_map_single(to_pci_dev(dev), cpu_addr,
				      size, (int)direction);
#endif
	return sbus_map_single(dev, cpu_addr, size, (int)direction);
}
EXPORT_SYMBOL(dma_map_single);

void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
		      size_t size,
		      enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type) {
		pci_unmap_single(to_pci_dev(dev), dma_addr,
				 size, (int)direction);
		return;
	}
#endif
	sbus_unmap_single(dev, dma_addr, size, (int)direction);
}
EXPORT_SYMBOL(dma_unmap_single);

dma_addr_t dma_map_page(struct device *dev, struct page *page,
			unsigned long offset, size_t size,
			enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type)
		return pci_map_page(to_pci_dev(dev), page, offset,
				    size, (int)direction);
#endif
	return sbus_map_single(dev, page_address(page) + offset,
			       size, (int)direction);
}
EXPORT_SYMBOL(dma_map_page);

void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
		    size_t size, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type) {
		pci_unmap_page(to_pci_dev(dev), dma_address,
			       size, (int)direction);
		return;
	}
#endif
	sbus_unmap_single(dev, dma_address, size, (int)direction);
}
EXPORT_SYMBOL(dma_unmap_page);

int dma_map_sg(struct device *dev, struct scatterlist *sg,
			     int nents, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type)
		return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
#endif
	return sbus_map_sg(dev, sg, nents, direction);
}
EXPORT_SYMBOL(dma_map_sg);

void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
		  int nents, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type) {
		pci_unmap_sg(to_pci_dev(dev), sg, nents, (int)direction);
		return;
	}
#endif
	sbus_unmap_sg(dev, sg, nents, (int)direction);
}
EXPORT_SYMBOL(dma_unmap_sg);

void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
			     size_t size, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type) {
		pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
					    size, (int)direction);
		return;
	}
#endif
	sbus_dma_sync_single_for_cpu(dev, dma_handle, size, (int) direction);
}
EXPORT_SYMBOL(dma_sync_single_for_cpu);

void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
				size_t size, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type) {
		pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
					       size, (int)direction);
		return;
	}
#endif
	sbus_dma_sync_single_for_device(dev, dma_handle, size, (int) direction);
}
EXPORT_SYMBOL(dma_sync_single_for_device);

void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
			 int nelems, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type) {
		pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg,
					nelems, (int)direction);
		return;
	}
#endif
	BUG();
}
EXPORT_SYMBOL(dma_sync_sg_for_cpu);

void dma_sync_sg_for_device(struct device *dev,
			    struct scatterlist *sg, int nelems,
			    enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
	if (dev->bus == &pci_bus_type) {
		pci_dma_sync_sg_for_device(to_pci_dev(dev), sg,
					   nelems, (int)direction);
		return;
	}
#endif
	BUG();
}
EXPORT_SYMBOL(dma_sync_sg_for_device);