1 #ifndef _ASM_GENERIC_DMA_MAPPING_H
2 #define _ASM_GENERIC_DMA_MAPPING_H
3
4 #include <linux/kmemcheck.h>
5 #include <linux/bug.h>
6 #include <linux/scatterlist.h>
7 #include <linux/dma-debug.h>
8 #include <linux/dma-attrs.h>
9
dma_map_single_attrs(struct device * dev,void * ptr,size_t size,enum dma_data_direction dir,struct dma_attrs * attrs)10 static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
11 size_t size,
12 enum dma_data_direction dir,
13 struct dma_attrs *attrs)
14 {
15 struct dma_map_ops *ops = get_dma_ops(dev);
16 dma_addr_t addr;
17
18 kmemcheck_mark_initialized(ptr, size);
19 BUG_ON(!valid_dma_direction(dir));
20 addr = ops->map_page(dev, virt_to_page(ptr),
21 (unsigned long)ptr & ~PAGE_MASK, size,
22 dir, attrs);
23 debug_dma_map_page(dev, virt_to_page(ptr),
24 (unsigned long)ptr & ~PAGE_MASK, size,
25 dir, addr, true);
26 return addr;
27 }
28
dma_unmap_single_attrs(struct device * dev,dma_addr_t addr,size_t size,enum dma_data_direction dir,struct dma_attrs * attrs)29 static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
30 size_t size,
31 enum dma_data_direction dir,
32 struct dma_attrs *attrs)
33 {
34 struct dma_map_ops *ops = get_dma_ops(dev);
35
36 BUG_ON(!valid_dma_direction(dir));
37 if (ops->unmap_page)
38 ops->unmap_page(dev, addr, size, dir, attrs);
39 debug_dma_unmap_page(dev, addr, size, dir, true);
40 }
41
dma_map_sg_attrs(struct device * dev,struct scatterlist * sg,int nents,enum dma_data_direction dir,struct dma_attrs * attrs)42 static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
43 int nents, enum dma_data_direction dir,
44 struct dma_attrs *attrs)
45 {
46 struct dma_map_ops *ops = get_dma_ops(dev);
47 int i, ents;
48 struct scatterlist *s;
49
50 for_each_sg(sg, s, nents, i)
51 kmemcheck_mark_initialized(sg_virt(s), s->length);
52 BUG_ON(!valid_dma_direction(dir));
53 ents = ops->map_sg(dev, sg, nents, dir, attrs);
54 debug_dma_map_sg(dev, sg, nents, ents, dir);
55
56 return ents;
57 }
58
dma_unmap_sg_attrs(struct device * dev,struct scatterlist * sg,int nents,enum dma_data_direction dir,struct dma_attrs * attrs)59 static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
60 int nents, enum dma_data_direction dir,
61 struct dma_attrs *attrs)
62 {
63 struct dma_map_ops *ops = get_dma_ops(dev);
64
65 BUG_ON(!valid_dma_direction(dir));
66 debug_dma_unmap_sg(dev, sg, nents, dir);
67 if (ops->unmap_sg)
68 ops->unmap_sg(dev, sg, nents, dir, attrs);
69 }
70
dma_map_page(struct device * dev,struct page * page,size_t offset,size_t size,enum dma_data_direction dir)71 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
72 size_t offset, size_t size,
73 enum dma_data_direction dir)
74 {
75 struct dma_map_ops *ops = get_dma_ops(dev);
76 dma_addr_t addr;
77
78 kmemcheck_mark_initialized(page_address(page) + offset, size);
79 BUG_ON(!valid_dma_direction(dir));
80 addr = ops->map_page(dev, page, offset, size, dir, NULL);
81 debug_dma_map_page(dev, page, offset, size, dir, addr, false);
82
83 return addr;
84 }
85
dma_unmap_page(struct device * dev,dma_addr_t addr,size_t size,enum dma_data_direction dir)86 static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
87 size_t size, enum dma_data_direction dir)
88 {
89 struct dma_map_ops *ops = get_dma_ops(dev);
90
91 BUG_ON(!valid_dma_direction(dir));
92 if (ops->unmap_page)
93 ops->unmap_page(dev, addr, size, dir, NULL);
94 debug_dma_unmap_page(dev, addr, size, dir, false);
95 }
96
dma_sync_single_for_cpu(struct device * dev,dma_addr_t addr,size_t size,enum dma_data_direction dir)97 static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
98 size_t size,
99 enum dma_data_direction dir)
100 {
101 struct dma_map_ops *ops = get_dma_ops(dev);
102
103 BUG_ON(!valid_dma_direction(dir));
104 if (ops->sync_single_for_cpu)
105 ops->sync_single_for_cpu(dev, addr, size, dir);
106 debug_dma_sync_single_for_cpu(dev, addr, size, dir);
107 }
108
dma_sync_single_for_device(struct device * dev,dma_addr_t addr,size_t size,enum dma_data_direction dir)109 static inline void dma_sync_single_for_device(struct device *dev,
110 dma_addr_t addr, size_t size,
111 enum dma_data_direction dir)
112 {
113 struct dma_map_ops *ops = get_dma_ops(dev);
114
115 BUG_ON(!valid_dma_direction(dir));
116 if (ops->sync_single_for_device)
117 ops->sync_single_for_device(dev, addr, size, dir);
118 debug_dma_sync_single_for_device(dev, addr, size, dir);
119 }
120
dma_sync_single_range_for_cpu(struct device * dev,dma_addr_t addr,unsigned long offset,size_t size,enum dma_data_direction dir)121 static inline void dma_sync_single_range_for_cpu(struct device *dev,
122 dma_addr_t addr,
123 unsigned long offset,
124 size_t size,
125 enum dma_data_direction dir)
126 {
127 const struct dma_map_ops *ops = get_dma_ops(dev);
128
129 BUG_ON(!valid_dma_direction(dir));
130 if (ops->sync_single_for_cpu)
131 ops->sync_single_for_cpu(dev, addr + offset, size, dir);
132 debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
133 }
134
dma_sync_single_range_for_device(struct device * dev,dma_addr_t addr,unsigned long offset,size_t size,enum dma_data_direction dir)135 static inline void dma_sync_single_range_for_device(struct device *dev,
136 dma_addr_t addr,
137 unsigned long offset,
138 size_t size,
139 enum dma_data_direction dir)
140 {
141 const struct dma_map_ops *ops = get_dma_ops(dev);
142
143 BUG_ON(!valid_dma_direction(dir));
144 if (ops->sync_single_for_device)
145 ops->sync_single_for_device(dev, addr + offset, size, dir);
146 debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
147 }
148
149 static inline void
dma_sync_sg_for_cpu(struct device * dev,struct scatterlist * sg,int nelems,enum dma_data_direction dir)150 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
151 int nelems, enum dma_data_direction dir)
152 {
153 struct dma_map_ops *ops = get_dma_ops(dev);
154
155 BUG_ON(!valid_dma_direction(dir));
156 if (ops->sync_sg_for_cpu)
157 ops->sync_sg_for_cpu(dev, sg, nelems, dir);
158 debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
159 }
160
161 static inline void
dma_sync_sg_for_device(struct device * dev,struct scatterlist * sg,int nelems,enum dma_data_direction dir)162 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
163 int nelems, enum dma_data_direction dir)
164 {
165 struct dma_map_ops *ops = get_dma_ops(dev);
166
167 BUG_ON(!valid_dma_direction(dir));
168 if (ops->sync_sg_for_device)
169 ops->sync_sg_for_device(dev, sg, nelems, dir);
170 debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
171
172 }
173
174 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
175 #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
176 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
177 #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
178
179 #endif
180