aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel/dma.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/kernel/dma.c')
-rw-r--r--arch/sparc/kernel/dma.c175
1 files changed, 5 insertions, 170 deletions
diff --git a/arch/sparc/kernel/dma.c b/arch/sparc/kernel/dma.c
index 524c32f97c55..e1ba8ee21b9a 100644
--- a/arch/sparc/kernel/dma.c
+++ b/arch/sparc/kernel/dma.c
@@ -1,178 +1,13 @@
1/* dma.c: PCI and SBUS DMA accessors for 32-bit sparc.
2 *
3 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
4 */
5
6#include <linux/kernel.h> 1#include <linux/kernel.h>
7#include <linux/module.h> 2#include <linux/module.h>
8#include <linux/dma-mapping.h> 3#include <linux/dma-mapping.h>
9#include <linux/scatterlist.h> 4#include <linux/dma-debug.h>
10#include <linux/mm.h>
11
12#ifdef CONFIG_PCI
13#include <linux/pci.h>
14#endif
15 5
16#include "dma.h" 6#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 15)
17 7
18int dma_supported(struct device *dev, u64 mask) 8static int __init dma_init(void)
19{ 9{
20#ifdef CONFIG_PCI 10 dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
21 if (dev->bus == &pci_bus_type)
22 return pci_dma_supported(to_pci_dev(dev), mask);
23#endif
24 return 0; 11 return 0;
25} 12}
26EXPORT_SYMBOL(dma_supported); 13fs_initcall(dma_init);
27
28int dma_set_mask(struct device *dev, u64 dma_mask)
29{
30#ifdef CONFIG_PCI
31 if (dev->bus == &pci_bus_type)
32 return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
33#endif
34 return -EOPNOTSUPP;
35}
36EXPORT_SYMBOL(dma_set_mask);
37
38static void *dma32_alloc_coherent(struct device *dev, size_t size,
39 dma_addr_t *dma_handle, gfp_t flag)
40{
41#ifdef CONFIG_PCI
42 if (dev->bus == &pci_bus_type)
43 return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
44#endif
45 return sbus_alloc_consistent(dev, size, dma_handle);
46}
47
48static void dma32_free_coherent(struct device *dev, size_t size,
49 void *cpu_addr, dma_addr_t dma_handle)
50{
51#ifdef CONFIG_PCI
52 if (dev->bus == &pci_bus_type) {
53 pci_free_consistent(to_pci_dev(dev), size,
54 cpu_addr, dma_handle);
55 return;
56 }
57#endif
58 sbus_free_consistent(dev, size, cpu_addr, dma_handle);
59}
60
61static dma_addr_t dma32_map_page(struct device *dev, struct page *page,
62 unsigned long offset, size_t size,
63 enum dma_data_direction direction)
64{
65#ifdef CONFIG_PCI
66 if (dev->bus == &pci_bus_type)
67 return pci_map_page(to_pci_dev(dev), page, offset,
68 size, (int)direction);
69#endif
70 return sbus_map_single(dev, page_address(page) + offset,
71 size, (int)direction);
72}
73
74static void dma32_unmap_page(struct device *dev, dma_addr_t dma_address,
75 size_t size, enum dma_data_direction direction)
76{
77#ifdef CONFIG_PCI
78 if (dev->bus == &pci_bus_type) {
79 pci_unmap_page(to_pci_dev(dev), dma_address,
80 size, (int)direction);
81 return;
82 }
83#endif
84 sbus_unmap_single(dev, dma_address, size, (int)direction);
85}
86
87static int dma32_map_sg(struct device *dev, struct scatterlist *sg,
88 int nents, enum dma_data_direction direction)
89{
90#ifdef CONFIG_PCI
91 if (dev->bus == &pci_bus_type)
92 return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
93#endif
94 return sbus_map_sg(dev, sg, nents, direction);
95}
96
97void dma32_unmap_sg(struct device *dev, struct scatterlist *sg,
98 int nents, enum dma_data_direction direction)
99{
100#ifdef CONFIG_PCI
101 if (dev->bus == &pci_bus_type) {
102 pci_unmap_sg(to_pci_dev(dev), sg, nents, (int)direction);
103 return;
104 }
105#endif
106 sbus_unmap_sg(dev, sg, nents, (int)direction);
107}
108
109static void dma32_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
110 size_t size,
111 enum dma_data_direction direction)
112{
113#ifdef CONFIG_PCI
114 if (dev->bus == &pci_bus_type) {
115 pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
116 size, (int)direction);
117 return;
118 }
119#endif
120 sbus_dma_sync_single_for_cpu(dev, dma_handle, size, (int) direction);
121}
122
123static void dma32_sync_single_for_device(struct device *dev,
124 dma_addr_t dma_handle, size_t size,
125 enum dma_data_direction direction)
126{
127#ifdef CONFIG_PCI
128 if (dev->bus == &pci_bus_type) {
129 pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
130 size, (int)direction);
131 return;
132 }
133#endif
134 sbus_dma_sync_single_for_device(dev, dma_handle, size, (int) direction);
135}
136
137static void dma32_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
138 int nelems, enum dma_data_direction direction)
139{
140#ifdef CONFIG_PCI
141 if (dev->bus == &pci_bus_type) {
142 pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg,
143 nelems, (int)direction);
144 return;
145 }
146#endif
147 BUG();
148}
149
150static void dma32_sync_sg_for_device(struct device *dev,
151 struct scatterlist *sg, int nelems,
152 enum dma_data_direction direction)
153{
154#ifdef CONFIG_PCI
155 if (dev->bus == &pci_bus_type) {
156 pci_dma_sync_sg_for_device(to_pci_dev(dev), sg,
157 nelems, (int)direction);
158 return;
159 }
160#endif
161 BUG();
162}
163
164static const struct dma_ops dma32_dma_ops = {
165 .alloc_coherent = dma32_alloc_coherent,
166 .free_coherent = dma32_free_coherent,
167 .map_page = dma32_map_page,
168 .unmap_page = dma32_unmap_page,
169 .map_sg = dma32_map_sg,
170 .unmap_sg = dma32_unmap_sg,
171 .sync_single_for_cpu = dma32_sync_single_for_cpu,
172 .sync_single_for_device = dma32_sync_single_for_device,
173 .sync_sg_for_cpu = dma32_sync_sg_for_cpu,
174 .sync_sg_for_device = dma32_sync_sg_for_device,
175};
176
177const struct dma_ops *dma_ops = &dma32_dma_ops;
178EXPORT_SYMBOL(dma_ops);
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-27 10:34:45 -0400