Commit | Line | Data |
---|---|---|
1965aae3 PA |
1 | #ifndef _ASM_X86_DMA_MAPPING_H |
2 | #define _ASM_X86_DMA_MAPPING_H | |
6f536635 GC |
3 | |
4 | /* | |
5 | * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for | |
6 | * documentation. | |
7 | */ | |
8 | ||
9 | #include <linux/scatterlist.h> | |
abe6602b | 10 | #include <linux/dma-attrs.h> |
6f536635 GC |
11 | #include <asm/io.h> |
12 | #include <asm/swiotlb.h> | |
6c505ce3 | 13 | #include <asm-generic/dma-coherent.h> |
6f536635 | 14 | |
7c183416 | 15 | extern dma_addr_t bad_dma_address; |
b7107a3d | 16 | extern int iommu_merge; |
6c505ce3 | 17 | extern struct device x86_dma_fallback_dev; |
b7107a3d | 18 | extern int panic_on_overflow; |
7c183416 | 19 | |
6f536635 | 20 | struct dma_mapping_ops { |
8d8bb39b FT |
21 | int (*mapping_error)(struct device *dev, |
22 | dma_addr_t dma_addr); | |
6f536635 GC |
23 | void* (*alloc_coherent)(struct device *dev, size_t size, |
24 | dma_addr_t *dma_handle, gfp_t gfp); | |
25 | void (*free_coherent)(struct device *dev, size_t size, | |
26 | void *vaddr, dma_addr_t dma_handle); | |
6f536635 GC |
27 | void (*sync_single_for_cpu)(struct device *hwdev, |
28 | dma_addr_t dma_handle, size_t size, | |
29 | int direction); | |
30 | void (*sync_single_for_device)(struct device *hwdev, | |
31 | dma_addr_t dma_handle, size_t size, | |
32 | int direction); | |
33 | void (*sync_single_range_for_cpu)(struct device *hwdev, | |
34 | dma_addr_t dma_handle, unsigned long offset, | |
35 | size_t size, int direction); | |
36 | void (*sync_single_range_for_device)(struct device *hwdev, | |
37 | dma_addr_t dma_handle, unsigned long offset, | |
38 | size_t size, int direction); | |
39 | void (*sync_sg_for_cpu)(struct device *hwdev, | |
40 | struct scatterlist *sg, int nelems, | |
41 | int direction); | |
42 | void (*sync_sg_for_device)(struct device *hwdev, | |
43 | struct scatterlist *sg, int nelems, | |
44 | int direction); | |
45 | int (*map_sg)(struct device *hwdev, struct scatterlist *sg, | |
46 | int nents, int direction); | |
47 | void (*unmap_sg)(struct device *hwdev, | |
48 | struct scatterlist *sg, int nents, | |
49 | int direction); | |
abe6602b FT |
50 | dma_addr_t (*map_page)(struct device *dev, struct page *page, |
51 | unsigned long offset, size_t size, | |
52 | enum dma_data_direction dir, | |
53 | struct dma_attrs *attrs); | |
54 | void (*unmap_page)(struct device *dev, dma_addr_t dma_handle, | |
55 | size_t size, enum dma_data_direction dir, | |
56 | struct dma_attrs *attrs); | |
6f536635 GC |
57 | int (*dma_supported)(struct device *hwdev, u64 mask); |
58 | int is_phys; | |
59 | }; | |
60 | ||
8d8bb39b | 61 | extern struct dma_mapping_ops *dma_ops; |
22456b97 | 62 | |
8d8bb39b | 63 | static inline struct dma_mapping_ops *get_dma_ops(struct device *dev) |
c786df08 | 64 | { |
8d8bb39b FT |
65 | #ifdef CONFIG_X86_32 |
66 | return dma_ops; | |
67 | #else | |
68 | if (unlikely(!dev) || !dev->archdata.dma_ops) | |
69 | return dma_ops; | |
70 | else | |
71 | return dev->archdata.dma_ops; | |
cfb80c9e | 72 | #endif |
8d8bb39b FT |
73 | } |
74 | ||
75 | /* Make sure we keep the same behaviour */ | |
76 | static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) | |
77 | { | |
8d8bb39b FT |
78 | struct dma_mapping_ops *ops = get_dma_ops(dev); |
79 | if (ops->mapping_error) | |
80 | return ops->mapping_error(dev, dma_addr); | |
c786df08 | 81 | |
7b1dedca | 82 | return (dma_addr == bad_dma_address); |
c786df08 GC |
83 | } |
84 | ||
8d396ded GC |
85 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
86 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) | |
6c505ce3 | 87 | #define dma_is_consistent(d, h) (1) |
8d396ded | 88 | |
802c1f66 GC |
89 | extern int dma_supported(struct device *hwdev, u64 mask); |
90 | extern int dma_set_mask(struct device *dev, u64 mask); | |
91 | ||
9f6ac577 FT |
92 | extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, |
93 | dma_addr_t *dma_addr, gfp_t flag); | |
94 | ||
22456b97 GC |
95 | static inline dma_addr_t |
96 | dma_map_single(struct device *hwdev, void *ptr, size_t size, | |
97 | int direction) | |
98 | { | |
8d8bb39b FT |
99 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
100 | ||
22456b97 | 101 | BUG_ON(!valid_dma_direction(direction)); |
d7dff840 FT |
102 | return ops->map_page(hwdev, virt_to_page(ptr), |
103 | (unsigned long)ptr & ~PAGE_MASK, size, | |
104 | direction, NULL); | |
22456b97 GC |
105 | } |
106 | ||
0cb0ae68 GC |
107 | static inline void |
108 | dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size, | |
109 | int direction) | |
110 | { | |
8d8bb39b FT |
111 | struct dma_mapping_ops *ops = get_dma_ops(dev); |
112 | ||
0cb0ae68 | 113 | BUG_ON(!valid_dma_direction(direction)); |
d7dff840 FT |
114 | if (ops->unmap_page) |
115 | ops->unmap_page(dev, addr, size, direction, NULL); | |
0cb0ae68 GC |
116 | } |
117 | ||
16a3ce9b GC |
118 | static inline int |
119 | dma_map_sg(struct device *hwdev, struct scatterlist *sg, | |
120 | int nents, int direction) | |
121 | { | |
8d8bb39b FT |
122 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
123 | ||
16a3ce9b | 124 | BUG_ON(!valid_dma_direction(direction)); |
8d8bb39b | 125 | return ops->map_sg(hwdev, sg, nents, direction); |
16a3ce9b | 126 | } |
72c784f8 GC |
127 | |
128 | static inline void | |
129 | dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, | |
130 | int direction) | |
131 | { | |
8d8bb39b FT |
132 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
133 | ||
72c784f8 | 134 | BUG_ON(!valid_dma_direction(direction)); |
8d8bb39b FT |
135 | if (ops->unmap_sg) |
136 | ops->unmap_sg(hwdev, sg, nents, direction); | |
72c784f8 | 137 | } |
c01dd8cf GC |
138 | |
139 | static inline void | |
140 | dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle, | |
141 | size_t size, int direction) | |
142 | { | |
8d8bb39b FT |
143 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
144 | ||
c01dd8cf | 145 | BUG_ON(!valid_dma_direction(direction)); |
8d8bb39b FT |
146 | if (ops->sync_single_for_cpu) |
147 | ops->sync_single_for_cpu(hwdev, dma_handle, size, direction); | |
c01dd8cf GC |
148 | flush_write_buffers(); |
149 | } | |
150 | ||
9231b269 GC |
151 | static inline void |
152 | dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle, | |
153 | size_t size, int direction) | |
154 | { | |
8d8bb39b FT |
155 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
156 | ||
9231b269 | 157 | BUG_ON(!valid_dma_direction(direction)); |
8d8bb39b FT |
158 | if (ops->sync_single_for_device) |
159 | ops->sync_single_for_device(hwdev, dma_handle, size, direction); | |
9231b269 GC |
160 | flush_write_buffers(); |
161 | } | |
162 | ||
627610fc GC |
163 | static inline void |
164 | dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle, | |
165 | unsigned long offset, size_t size, int direction) | |
166 | { | |
8d8bb39b | 167 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
627610fc | 168 | |
8d8bb39b FT |
169 | BUG_ON(!valid_dma_direction(direction)); |
170 | if (ops->sync_single_range_for_cpu) | |
171 | ops->sync_single_range_for_cpu(hwdev, dma_handle, offset, | |
172 | size, direction); | |
627610fc GC |
173 | flush_write_buffers(); |
174 | } | |
71362332 GC |
175 | |
176 | static inline void | |
177 | dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle, | |
178 | unsigned long offset, size_t size, | |
179 | int direction) | |
180 | { | |
8d8bb39b | 181 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
71362332 | 182 | |
8d8bb39b FT |
183 | BUG_ON(!valid_dma_direction(direction)); |
184 | if (ops->sync_single_range_for_device) | |
185 | ops->sync_single_range_for_device(hwdev, dma_handle, | |
186 | offset, size, direction); | |
71362332 GC |
187 | flush_write_buffers(); |
188 | } | |
189 | ||
ed435dee GC |
190 | static inline void |
191 | dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, | |
192 | int nelems, int direction) | |
193 | { | |
8d8bb39b FT |
194 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
195 | ||
ed435dee | 196 | BUG_ON(!valid_dma_direction(direction)); |
8d8bb39b FT |
197 | if (ops->sync_sg_for_cpu) |
198 | ops->sync_sg_for_cpu(hwdev, sg, nelems, direction); | |
ed435dee GC |
199 | flush_write_buffers(); |
200 | } | |
e7f3a913 GC |
201 | |
202 | static inline void | |
203 | dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, | |
204 | int nelems, int direction) | |
205 | { | |
8d8bb39b FT |
206 | struct dma_mapping_ops *ops = get_dma_ops(hwdev); |
207 | ||
e7f3a913 | 208 | BUG_ON(!valid_dma_direction(direction)); |
8d8bb39b FT |
209 | if (ops->sync_sg_for_device) |
210 | ops->sync_sg_for_device(hwdev, sg, nelems, direction); | |
e7f3a913 GC |
211 | |
212 | flush_write_buffers(); | |
213 | } | |
4d92fbf2 GC |
214 | |
215 | static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, | |
216 | size_t offset, size_t size, | |
217 | int direction) | |
218 | { | |
8d8bb39b FT |
219 | struct dma_mapping_ops *ops = get_dma_ops(dev); |
220 | ||
2be62149 | 221 | BUG_ON(!valid_dma_direction(direction)); |
d7dff840 | 222 | return ops->map_page(dev, page, offset, size, direction, NULL); |
4d92fbf2 GC |
223 | } |
224 | ||
225 | static inline void dma_unmap_page(struct device *dev, dma_addr_t addr, | |
226 | size_t size, int direction) | |
227 | { | |
228 | dma_unmap_single(dev, addr, size, direction); | |
229 | } | |
230 | ||
3cb6a917 GC |
231 | static inline void |
232 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, | |
233 | enum dma_data_direction dir) | |
234 | { | |
235 | flush_write_buffers(); | |
236 | } | |
ae17a63b | 237 | |
b7107a3d GC |
238 | static inline int dma_get_cache_alignment(void) |
239 | { | |
240 | /* no easy way to get cache size on all x86, so return the | |
241 | * maximum possible, to be safe */ | |
242 | return boot_cpu_data.x86_clflush_size; | |
243 | } | |
244 | ||
823e7e8c FT |
245 | static inline unsigned long dma_alloc_coherent_mask(struct device *dev, |
246 | gfp_t gfp) | |
247 | { | |
248 | unsigned long dma_mask = 0; | |
b7107a3d | 249 | |
823e7e8c FT |
250 | dma_mask = dev->coherent_dma_mask; |
251 | if (!dma_mask) | |
252 | dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK; | |
253 | ||
254 | return dma_mask; | |
255 | } | |
256 | ||
257 | static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp) | |
258 | { | |
259 | unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp); | |
260 | ||
75bebb7f FT |
261 | if (dma_mask <= DMA_24BIT_MASK) |
262 | gfp |= GFP_DMA; | |
263 | #ifdef CONFIG_X86_64 | |
823e7e8c FT |
264 | if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) |
265 | gfp |= GFP_DMA32; | |
266 | #endif | |
267 | return gfp; | |
268 | } | |
269 | ||
6c505ce3 JR |
270 | static inline void * |
271 | dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, | |
272 | gfp_t gfp) | |
273 | { | |
274 | struct dma_mapping_ops *ops = get_dma_ops(dev); | |
275 | void *memory; | |
276 | ||
8a53ad67 FT |
277 | gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); |
278 | ||
6c505ce3 JR |
279 | if (dma_alloc_from_coherent(dev, size, dma_handle, &memory)) |
280 | return memory; | |
281 | ||
282 | if (!dev) { | |
283 | dev = &x86_dma_fallback_dev; | |
284 | gfp |= GFP_DMA; | |
285 | } | |
286 | ||
98216260 | 287 | if (!is_device_dma_capable(dev)) |
de9f521f FT |
288 | return NULL; |
289 | ||
823e7e8c FT |
290 | if (!ops->alloc_coherent) |
291 | return NULL; | |
292 | ||
293 | return ops->alloc_coherent(dev, size, dma_handle, | |
294 | dma_alloc_coherent_gfp_flags(dev, gfp)); | |
6c505ce3 JR |
295 | } |
296 | ||
297 | static inline void dma_free_coherent(struct device *dev, size_t size, | |
298 | void *vaddr, dma_addr_t bus) | |
299 | { | |
300 | struct dma_mapping_ops *ops = get_dma_ops(dev); | |
301 | ||
302 | WARN_ON(irqs_disabled()); /* for portability */ | |
303 | ||
304 | if (dma_release_from_coherent(dev, get_order(size), vaddr)) | |
305 | return; | |
306 | ||
307 | if (ops->free_coherent) | |
308 | ops->free_coherent(dev, size, vaddr, bus); | |
309 | } | |
b7107a3d | 310 | |
6f536635 | 311 | #endif |