Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004 IBM |
| 3 | * |
| 4 | * Implements the generic device dma API for powerpc. |
| 5 | * the pci and vio busses |
| 6 | */ |
| 7 | #ifndef _ASM_DMA_MAPPING_H |
| 8 | #define _ASM_DMA_MAPPING_H |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 9 | #ifdef __KERNEL__ |
| 10 | |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/cache.h> |
| 13 | /* need struct page definitions */ |
| 14 | #include <linux/mm.h> |
| 15 | #include <linux/scatterlist.h> |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 16 | #include <linux/dma-attrs.h> |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 17 | #include <asm/io.h> |
| 18 | |
| 19 | #define DMA_ERROR_CODE (~(dma_addr_t)0x0) |
| 20 | |
| 21 | #ifdef CONFIG_NOT_COHERENT_CACHE |
| 22 | /* |
| 23 | * DMA-consistent mapping functions for PowerPCs that don't support |
| 24 | * cache snooping. These allocate/free a region of uncached mapped |
| 25 | * memory space for use with DMA devices. Alternatively, you could |
| 26 | * allocate the space "normally" and use the cache management functions |
| 27 | * to ensure it is consistent. |
| 28 | */ |
| 29 | extern void *__dma_alloc_coherent(size_t size, dma_addr_t *handle, gfp_t gfp); |
| 30 | extern void __dma_free_coherent(size_t size, void *vaddr); |
| 31 | extern void __dma_sync(void *vaddr, size_t size, int direction); |
| 32 | extern void __dma_sync_page(struct page *page, unsigned long offset, |
| 33 | size_t size, int direction); |
| 34 | |
| 35 | #else /* ! CONFIG_NOT_COHERENT_CACHE */ |
| 36 | /* |
| 37 | * Cache coherent cores. |
| 38 | */ |
| 39 | |
| 40 | #define __dma_alloc_coherent(gfp, size, handle) NULL |
| 41 | #define __dma_free_coherent(size, addr) ((void)0) |
| 42 | #define __dma_sync(addr, size, rw) ((void)0) |
| 43 | #define __dma_sync_page(pg, off, sz, rw) ((void)0) |
| 44 | |
| 45 | #endif /* ! CONFIG_NOT_COHERENT_CACHE */ |
| 46 | |
| 47 | #ifdef CONFIG_PPC64 |
| 48 | /* |
| 49 | * DMA operations are abstracted for G5 vs. i/pSeries, PCI vs. VIO |
| 50 | */ |
| 51 | struct dma_mapping_ops { |
| 52 | void * (*alloc_coherent)(struct device *dev, size_t size, |
| 53 | dma_addr_t *dma_handle, gfp_t flag); |
| 54 | void (*free_coherent)(struct device *dev, size_t size, |
| 55 | void *vaddr, dma_addr_t dma_handle); |
| 56 | dma_addr_t (*map_single)(struct device *dev, void *ptr, |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 57 | size_t size, enum dma_data_direction direction, |
| 58 | struct dma_attrs *attrs); |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 59 | void (*unmap_single)(struct device *dev, dma_addr_t dma_addr, |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 60 | size_t size, enum dma_data_direction direction, |
| 61 | struct dma_attrs *attrs); |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 62 | int (*map_sg)(struct device *dev, struct scatterlist *sg, |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 63 | int nents, enum dma_data_direction direction, |
| 64 | struct dma_attrs *attrs); |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 65 | void (*unmap_sg)(struct device *dev, struct scatterlist *sg, |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 66 | int nents, enum dma_data_direction direction, |
| 67 | struct dma_attrs *attrs); |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 68 | int (*dma_supported)(struct device *dev, u64 mask); |
| 69 | int (*set_dma_mask)(struct device *dev, u64 dma_mask); |
| 70 | }; |
| 71 | |
| 72 | static inline struct dma_mapping_ops *get_dma_ops(struct device *dev) |
| 73 | { |
| 74 | /* We don't handle the NULL dev case for ISA for now. We could |
| 75 | * do it via an out of line call but it is not needed for now. The |
| 76 | * only ISA DMA device we support is the floppy and we have a hack |
| 77 | * in the floppy driver directly to get a device for us. |
| 78 | */ |
| 79 | if (unlikely(dev == NULL || dev->archdata.dma_ops == NULL)) |
| 80 | return NULL; |
| 81 | return dev->archdata.dma_ops; |
| 82 | } |
| 83 | |
Michael Ellerman | 1f62a16 | 2008-01-30 01:13:58 +1100 | [diff] [blame] | 84 | static inline void set_dma_ops(struct device *dev, struct dma_mapping_ops *ops) |
| 85 | { |
| 86 | dev->archdata.dma_ops = ops; |
| 87 | } |
| 88 | |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 89 | static inline int dma_supported(struct device *dev, u64 mask) |
| 90 | { |
| 91 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 92 | |
| 93 | if (unlikely(dma_ops == NULL)) |
| 94 | return 0; |
| 95 | if (dma_ops->dma_supported == NULL) |
| 96 | return 1; |
| 97 | return dma_ops->dma_supported(dev, mask); |
| 98 | } |
| 99 | |
Michael Ellerman | 84631f3 | 2007-12-17 17:35:53 +1100 | [diff] [blame] | 100 | /* We have our own implementation of pci_set_dma_mask() */ |
| 101 | #define HAVE_ARCH_PCI_SET_DMA_MASK |
| 102 | |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 103 | static inline int dma_set_mask(struct device *dev, u64 dma_mask) |
| 104 | { |
| 105 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 106 | |
| 107 | if (unlikely(dma_ops == NULL)) |
| 108 | return -EIO; |
| 109 | if (dma_ops->set_dma_mask != NULL) |
| 110 | return dma_ops->set_dma_mask(dev, dma_mask); |
| 111 | if (!dev->dma_mask || !dma_supported(dev, dma_mask)) |
| 112 | return -EIO; |
| 113 | *dev->dma_mask = dma_mask; |
| 114 | return 0; |
| 115 | } |
| 116 | |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 117 | static inline dma_addr_t dma_map_single_attrs(struct device *dev, |
| 118 | void *cpu_addr, |
| 119 | size_t size, |
| 120 | enum dma_data_direction direction, |
| 121 | struct dma_attrs *attrs) |
| 122 | { |
| 123 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 124 | |
| 125 | BUG_ON(!dma_ops); |
| 126 | return dma_ops->map_single(dev, cpu_addr, size, direction, attrs); |
| 127 | } |
| 128 | |
| 129 | static inline void dma_unmap_single_attrs(struct device *dev, |
| 130 | dma_addr_t dma_addr, |
| 131 | size_t size, |
| 132 | enum dma_data_direction direction, |
| 133 | struct dma_attrs *attrs) |
| 134 | { |
| 135 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 136 | |
| 137 | BUG_ON(!dma_ops); |
| 138 | dma_ops->unmap_single(dev, dma_addr, size, direction, attrs); |
| 139 | } |
| 140 | |
| 141 | static inline dma_addr_t dma_map_page_attrs(struct device *dev, |
| 142 | struct page *page, |
| 143 | unsigned long offset, size_t size, |
| 144 | enum dma_data_direction direction, |
| 145 | struct dma_attrs *attrs) |
| 146 | { |
| 147 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 148 | |
| 149 | BUG_ON(!dma_ops); |
| 150 | return dma_ops->map_single(dev, page_address(page) + offset, size, |
| 151 | direction, attrs); |
| 152 | } |
| 153 | |
| 154 | static inline void dma_unmap_page_attrs(struct device *dev, |
| 155 | dma_addr_t dma_address, |
| 156 | size_t size, |
| 157 | enum dma_data_direction direction, |
| 158 | struct dma_attrs *attrs) |
| 159 | { |
| 160 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 161 | |
| 162 | BUG_ON(!dma_ops); |
| 163 | dma_ops->unmap_single(dev, dma_address, size, direction, attrs); |
| 164 | } |
| 165 | |
| 166 | static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, |
| 167 | int nents, enum dma_data_direction direction, |
| 168 | struct dma_attrs *attrs) |
| 169 | { |
| 170 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 171 | |
| 172 | BUG_ON(!dma_ops); |
| 173 | return dma_ops->map_sg(dev, sg, nents, direction, attrs); |
| 174 | } |
| 175 | |
| 176 | static inline void dma_unmap_sg_attrs(struct device *dev, |
| 177 | struct scatterlist *sg, |
| 178 | int nhwentries, |
| 179 | enum dma_data_direction direction, |
| 180 | struct dma_attrs *attrs) |
| 181 | { |
| 182 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 183 | |
| 184 | BUG_ON(!dma_ops); |
| 185 | dma_ops->unmap_sg(dev, sg, nhwentries, direction, attrs); |
| 186 | } |
| 187 | |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 188 | static inline void *dma_alloc_coherent(struct device *dev, size_t size, |
| 189 | dma_addr_t *dma_handle, gfp_t flag) |
| 190 | { |
| 191 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 192 | |
| 193 | BUG_ON(!dma_ops); |
| 194 | return dma_ops->alloc_coherent(dev, size, dma_handle, flag); |
| 195 | } |
| 196 | |
| 197 | static inline void dma_free_coherent(struct device *dev, size_t size, |
| 198 | void *cpu_addr, dma_addr_t dma_handle) |
| 199 | { |
| 200 | struct dma_mapping_ops *dma_ops = get_dma_ops(dev); |
| 201 | |
| 202 | BUG_ON(!dma_ops); |
| 203 | dma_ops->free_coherent(dev, size, cpu_addr, dma_handle); |
| 204 | } |
| 205 | |
| 206 | static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, |
| 207 | size_t size, |
| 208 | enum dma_data_direction direction) |
| 209 | { |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 210 | return dma_map_single_attrs(dev, cpu_addr, size, direction, NULL); |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, |
| 214 | size_t size, |
| 215 | enum dma_data_direction direction) |
| 216 | { |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 217 | dma_unmap_single_attrs(dev, dma_addr, size, direction, NULL); |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, |
| 221 | unsigned long offset, size_t size, |
| 222 | enum dma_data_direction direction) |
| 223 | { |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 224 | return dma_map_page_attrs(dev, page, offset, size, direction, NULL); |
Anton Blanchard | 33ff910 | 2007-10-16 14:54:33 -0500 | [diff] [blame] | 225 | } |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 226 | |
| 227 | static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, |
| 228 | size_t size, |
| 229 | enum dma_data_direction direction) |
| 230 | { |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 231 | dma_unmap_page_attrs(dev, dma_address, size, direction, NULL); |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | static inline int dma_map_sg(struct device *dev, struct scatterlist *sg, |
| 235 | int nents, enum dma_data_direction direction) |
| 236 | { |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 237 | return dma_map_sg_attrs(dev, sg, nents, direction, NULL); |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, |
| 241 | int nhwentries, |
| 242 | enum dma_data_direction direction) |
| 243 | { |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame^] | 244 | dma_unmap_sg_attrs(dev, sg, nhwentries, direction, NULL); |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 245 | } |
| 246 | |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 247 | /* |
| 248 | * Available generic sets of operations |
| 249 | */ |
| 250 | extern struct dma_mapping_ops dma_iommu_ops; |
| 251 | extern struct dma_mapping_ops dma_direct_ops; |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 252 | |
| 253 | #else /* CONFIG_PPC64 */ |
| 254 | |
| 255 | #define dma_supported(dev, mask) (1) |
| 256 | |
| 257 | static inline int dma_set_mask(struct device *dev, u64 dma_mask) |
| 258 | { |
| 259 | if (!dev->dma_mask || !dma_supported(dev, mask)) |
| 260 | return -EIO; |
| 261 | |
| 262 | *dev->dma_mask = dma_mask; |
| 263 | |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | static inline void *dma_alloc_coherent(struct device *dev, size_t size, |
| 268 | dma_addr_t * dma_handle, |
| 269 | gfp_t gfp) |
| 270 | { |
| 271 | #ifdef CONFIG_NOT_COHERENT_CACHE |
| 272 | return __dma_alloc_coherent(size, dma_handle, gfp); |
| 273 | #else |
| 274 | void *ret; |
| 275 | /* ignore region specifiers */ |
| 276 | gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); |
| 277 | |
| 278 | if (dev == NULL || dev->coherent_dma_mask < 0xffffffff) |
| 279 | gfp |= GFP_DMA; |
| 280 | |
| 281 | ret = (void *)__get_free_pages(gfp, get_order(size)); |
| 282 | |
| 283 | if (ret != NULL) { |
| 284 | memset(ret, 0, size); |
| 285 | *dma_handle = virt_to_bus(ret); |
| 286 | } |
| 287 | |
| 288 | return ret; |
| 289 | #endif |
| 290 | } |
| 291 | |
| 292 | static inline void |
| 293 | dma_free_coherent(struct device *dev, size_t size, void *vaddr, |
| 294 | dma_addr_t dma_handle) |
| 295 | { |
| 296 | #ifdef CONFIG_NOT_COHERENT_CACHE |
| 297 | __dma_free_coherent(size, vaddr); |
| 298 | #else |
| 299 | free_pages((unsigned long)vaddr, get_order(size)); |
| 300 | #endif |
| 301 | } |
| 302 | |
| 303 | static inline dma_addr_t |
| 304 | dma_map_single(struct device *dev, void *ptr, size_t size, |
| 305 | enum dma_data_direction direction) |
| 306 | { |
| 307 | BUG_ON(direction == DMA_NONE); |
| 308 | |
| 309 | __dma_sync(ptr, size, direction); |
| 310 | |
| 311 | return virt_to_bus(ptr); |
| 312 | } |
| 313 | |
Segher Boessenkool | f774216d | 2007-08-02 01:41:15 +1000 | [diff] [blame] | 314 | static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, |
| 315 | size_t size, |
| 316 | enum dma_data_direction direction) |
| 317 | { |
| 318 | /* We do nothing. */ |
| 319 | } |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 320 | |
| 321 | static inline dma_addr_t |
| 322 | dma_map_page(struct device *dev, struct page *page, |
| 323 | unsigned long offset, size_t size, |
| 324 | enum dma_data_direction direction) |
| 325 | { |
| 326 | BUG_ON(direction == DMA_NONE); |
| 327 | |
| 328 | __dma_sync_page(page, offset, size, direction); |
| 329 | |
| 330 | return page_to_bus(page) + offset; |
| 331 | } |
| 332 | |
Segher Boessenkool | f774216d | 2007-08-02 01:41:15 +1000 | [diff] [blame] | 333 | static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, |
| 334 | size_t size, |
| 335 | enum dma_data_direction direction) |
| 336 | { |
| 337 | /* We do nothing. */ |
| 338 | } |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 339 | |
| 340 | static inline int |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 341 | dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents, |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 342 | enum dma_data_direction direction) |
| 343 | { |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 344 | struct scatterlist *sg; |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 345 | int i; |
| 346 | |
| 347 | BUG_ON(direction == DMA_NONE); |
| 348 | |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 349 | for_each_sg(sgl, sg, nents, i) { |
Olof Johansson | 5edadbd | 2007-10-23 09:13:14 +0200 | [diff] [blame] | 350 | BUG_ON(!sg_page(sg)); |
| 351 | __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction); |
| 352 | sg->dma_address = page_to_bus(sg_page(sg)) + sg->offset; |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | return nents; |
| 356 | } |
| 357 | |
Segher Boessenkool | f774216d | 2007-08-02 01:41:15 +1000 | [diff] [blame] | 358 | static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, |
| 359 | int nhwentries, |
| 360 | enum dma_data_direction direction) |
| 361 | { |
| 362 | /* We don't do anything here. */ |
| 363 | } |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 364 | |
| 365 | #endif /* CONFIG_PPC64 */ |
| 366 | |
| 367 | static inline void dma_sync_single_for_cpu(struct device *dev, |
| 368 | dma_addr_t dma_handle, size_t size, |
| 369 | enum dma_data_direction direction) |
| 370 | { |
| 371 | BUG_ON(direction == DMA_NONE); |
| 372 | __dma_sync(bus_to_virt(dma_handle), size, direction); |
| 373 | } |
| 374 | |
| 375 | static inline void dma_sync_single_for_device(struct device *dev, |
| 376 | dma_addr_t dma_handle, size_t size, |
| 377 | enum dma_data_direction direction) |
| 378 | { |
| 379 | BUG_ON(direction == DMA_NONE); |
| 380 | __dma_sync(bus_to_virt(dma_handle), size, direction); |
| 381 | } |
| 382 | |
| 383 | static inline void dma_sync_sg_for_cpu(struct device *dev, |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 384 | struct scatterlist *sgl, int nents, |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 385 | enum dma_data_direction direction) |
| 386 | { |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 387 | struct scatterlist *sg; |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 388 | int i; |
| 389 | |
| 390 | BUG_ON(direction == DMA_NONE); |
| 391 | |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 392 | for_each_sg(sgl, sg, nents, i) |
Olof Johansson | 5edadbd | 2007-10-23 09:13:14 +0200 | [diff] [blame] | 393 | __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction); |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | static inline void dma_sync_sg_for_device(struct device *dev, |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 397 | struct scatterlist *sgl, int nents, |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 398 | enum dma_data_direction direction) |
| 399 | { |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 400 | struct scatterlist *sg; |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 401 | int i; |
| 402 | |
| 403 | BUG_ON(direction == DMA_NONE); |
| 404 | |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 405 | for_each_sg(sgl, sg, nents, i) |
Olof Johansson | 5edadbd | 2007-10-23 09:13:14 +0200 | [diff] [blame] | 406 | __dma_sync_page(sg_page(sg), sg->offset, sg->length, direction); |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | static inline int dma_mapping_error(dma_addr_t dma_addr) |
| 410 | { |
| 411 | #ifdef CONFIG_PPC64 |
| 412 | return (dma_addr == DMA_ERROR_CODE); |
| 413 | #else |
| 414 | return 0; |
| 415 | #endif |
| 416 | } |
| 417 | |
| 418 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| 419 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
| 420 | #ifdef CONFIG_NOT_COHERENT_CACHE |
Ralf Baechle | f67637e | 2006-12-06 20:38:54 -0800 | [diff] [blame] | 421 | #define dma_is_consistent(d, h) (0) |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 422 | #else |
Ralf Baechle | f67637e | 2006-12-06 20:38:54 -0800 | [diff] [blame] | 423 | #define dma_is_consistent(d, h) (1) |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 424 | #endif |
| 425 | |
| 426 | static inline int dma_get_cache_alignment(void) |
| 427 | { |
| 428 | #ifdef CONFIG_PPC64 |
| 429 | /* no easy way to get cache size on all processors, so return |
| 430 | * the maximum possible, to be safe */ |
Ravikiran G Thirumalai | 1fd73c6 | 2006-01-08 01:01:28 -0800 | [diff] [blame] | 431 | return (1 << INTERNODE_CACHE_SHIFT); |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 432 | #else |
| 433 | /* |
| 434 | * Each processor family will define its own L1_CACHE_SHIFT, |
| 435 | * L1_CACHE_BYTES wraps to this, so this is always safe. |
| 436 | */ |
| 437 | return L1_CACHE_BYTES; |
| 438 | #endif |
| 439 | } |
| 440 | |
| 441 | static inline void dma_sync_single_range_for_cpu(struct device *dev, |
| 442 | dma_addr_t dma_handle, unsigned long offset, size_t size, |
| 443 | enum dma_data_direction direction) |
| 444 | { |
| 445 | /* just sync everything for now */ |
| 446 | dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction); |
| 447 | } |
| 448 | |
| 449 | static inline void dma_sync_single_range_for_device(struct device *dev, |
| 450 | dma_addr_t dma_handle, unsigned long offset, size_t size, |
| 451 | enum dma_data_direction direction) |
| 452 | { |
| 453 | /* just sync everything for now */ |
| 454 | dma_sync_single_for_device(dev, dma_handle, offset + size, direction); |
| 455 | } |
| 456 | |
Ralf Baechle | d3fa72e | 2006-12-06 20:38:56 -0800 | [diff] [blame] | 457 | static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 458 | enum dma_data_direction direction) |
| 459 | { |
| 460 | BUG_ON(direction == DMA_NONE); |
| 461 | __dma_sync(vaddr, size, (int)direction); |
| 462 | } |
| 463 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 464 | #endif /* __KERNEL__ */ |
Stephen Rothwell | 78b0973 | 2005-11-19 01:40:46 +1100 | [diff] [blame] | 465 | #endif /* _ASM_DMA_MAPPING_H */ |