Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _ASM_I386_DMA_MAPPING_H |
2 | #define _ASM_I386_DMA_MAPPING_H | |
3 | ||
4 | #include <linux/mm.h> | |
a17b4904 | 5 | #include <linux/scatterlist.h> |
1da177e4 LT |
6 | |
7 | #include <asm/cache.h> | |
8 | #include <asm/io.h> | |
fd78f117 | 9 | #include <asm/bug.h> |
1da177e4 LT |
10 | |
11 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) | |
12 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) | |
13 | ||
14 | void *dma_alloc_coherent(struct device *dev, size_t size, | |
dd0fc66f | 15 | dma_addr_t *dma_handle, gfp_t flag); |
1da177e4 LT |
16 | |
17 | void dma_free_coherent(struct device *dev, size_t size, | |
18 | void *vaddr, dma_addr_t dma_handle); | |
19 | ||
20 | static inline dma_addr_t | |
21 | dma_map_single(struct device *dev, void *ptr, size_t size, | |
22 | enum dma_data_direction direction) | |
23 | { | |
cd1c6a48 | 24 | BUG_ON(!valid_dma_direction(direction)); |
fd78f117 | 25 | WARN_ON(size == 0); |
1da177e4 LT |
26 | flush_write_buffers(); |
27 | return virt_to_phys(ptr); | |
28 | } | |
29 | ||
30 | static inline void | |
31 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, | |
32 | enum dma_data_direction direction) | |
33 | { | |
cd1c6a48 | 34 | BUG_ON(!valid_dma_direction(direction)); |
1da177e4 LT |
35 | } |
36 | ||
37 | static inline int | |
a17b4904 | 38 | dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, |
1da177e4 LT |
39 | enum dma_data_direction direction) |
40 | { | |
a17b4904 | 41 | struct scatterlist *sg; |
1da177e4 LT |
42 | int i; |
43 | ||
cd1c6a48 | 44 | BUG_ON(!valid_dma_direction(direction)); |
a17b4904 | 45 | WARN_ON(nents == 0 || sglist[0].length == 0); |
1da177e4 | 46 | |
a17b4904 JA |
47 | for_each_sg(sglist, sg, nents, i) { |
48 | BUG_ON(!sg->page); | |
1da177e4 | 49 | |
a17b4904 | 50 | sg->dma_address = page_to_phys(sg->page) + sg->offset; |
1da177e4 LT |
51 | } |
52 | ||
53 | flush_write_buffers(); | |
54 | return nents; | |
55 | } | |
56 | ||
57 | static inline dma_addr_t | |
58 | dma_map_page(struct device *dev, struct page *page, unsigned long offset, | |
59 | size_t size, enum dma_data_direction direction) | |
60 | { | |
cd1c6a48 | 61 | BUG_ON(!valid_dma_direction(direction)); |
1da177e4 LT |
62 | return page_to_phys(page) + offset; |
63 | } | |
64 | ||
65 | static inline void | |
66 | dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, | |
67 | enum dma_data_direction direction) | |
68 | { | |
cd1c6a48 | 69 | BUG_ON(!valid_dma_direction(direction)); |
1da177e4 LT |
70 | } |
71 | ||
72 | ||
73 | static inline void | |
74 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, | |
75 | enum dma_data_direction direction) | |
76 | { | |
cd1c6a48 | 77 | BUG_ON(!valid_dma_direction(direction)); |
1da177e4 LT |
78 | } |
79 | ||
80 | static inline void | |
81 | dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, | |
82 | enum dma_data_direction direction) | |
83 | { | |
84 | } | |
85 | ||
86 | static inline void | |
87 | dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, | |
88 | enum dma_data_direction direction) | |
89 | { | |
90 | flush_write_buffers(); | |
91 | } | |
92 | ||
93 | static inline void | |
94 | dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, | |
95 | unsigned long offset, size_t size, | |
96 | enum dma_data_direction direction) | |
97 | { | |
98 | } | |
99 | ||
100 | static inline void | |
101 | dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, | |
102 | unsigned long offset, size_t size, | |
103 | enum dma_data_direction direction) | |
104 | { | |
105 | flush_write_buffers(); | |
106 | } | |
107 | ||
108 | static inline void | |
109 | dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, | |
110 | enum dma_data_direction direction) | |
111 | { | |
112 | } | |
113 | ||
114 | static inline void | |
115 | dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, | |
116 | enum dma_data_direction direction) | |
117 | { | |
118 | flush_write_buffers(); | |
119 | } | |
120 | ||
121 | static inline int | |
122 | dma_mapping_error(dma_addr_t dma_addr) | |
123 | { | |
124 | return 0; | |
125 | } | |
126 | ||
388c19e1 AK |
127 | extern int forbid_dac; |
128 | ||
1da177e4 LT |
129 | static inline int |
130 | dma_supported(struct device *dev, u64 mask) | |
131 | { | |
132 | /* | |
133 | * we fall back to GFP_DMA when the mask isn't all 1s, | |
134 | * so we can't guarantee allocations that must be | |
135 | * within a tighter range than GFP_DMA.. | |
136 | */ | |
137 | if(mask < 0x00ffffff) | |
138 | return 0; | |
139 | ||
388c19e1 AK |
140 | /* Work around chipset bugs */ |
141 | if (forbid_dac > 0 && mask > 0xffffffffULL) | |
142 | return 0; | |
143 | ||
1da177e4 LT |
144 | return 1; |
145 | } | |
146 | ||
147 | static inline int | |
148 | dma_set_mask(struct device *dev, u64 mask) | |
149 | { | |
150 | if(!dev->dma_mask || !dma_supported(dev, mask)) | |
151 | return -EIO; | |
152 | ||
153 | *dev->dma_mask = mask; | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
158 | static inline int | |
159 | dma_get_cache_alignment(void) | |
160 | { | |
161 | /* no easy way to get cache size on all x86, so return the | |
162 | * maximum possible, to be safe */ | |
1fd73c6b | 163 | return (1 << INTERNODE_CACHE_SHIFT); |
1da177e4 LT |
164 | } |
165 | ||
f67637ee | 166 | #define dma_is_consistent(d, h) (1) |
1da177e4 LT |
167 | |
168 | static inline void | |
d3fa72e4 | 169 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
1da177e4 LT |
170 | enum dma_data_direction direction) |
171 | { | |
172 | flush_write_buffers(); | |
173 | } | |
174 | ||
175 | #define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY | |
176 | extern int | |
177 | dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, | |
178 | dma_addr_t device_addr, size_t size, int flags); | |
179 | ||
180 | extern void | |
181 | dma_release_declared_memory(struct device *dev); | |
182 | ||
183 | extern void * | |
184 | dma_mark_declared_memory_occupied(struct device *dev, | |
185 | dma_addr_t device_addr, size_t size); | |
186 | ||
187 | #endif |