include/asm-sparc64/dma-mapping.h

   1 #ifndef _ASM_SPARC64_DMA_MAPPING_H
   2 #define _ASM_SPARC64_DMA_MAPPING_H
   3
   4
   5 #ifdef CONFIG_PCI
   6
   7 /* we implement the API below in terms of the existing PCI one,
   8  * so include it */
   9 #include <linux/pci.h>
  10 /* need struct page definitions */
  11 #include <linux/mm.h>
  12
  13 #include <asm/of_device.h>
  14
  15 static inline int
  16 dma_supported(struct device *dev, u64 mask)
  17 {
  18         BUG_ON(dev->bus != &pci_bus_type &&
  19                dev->bus != &ebus_bus_type);
  20
  21         return pci_dma_supported(to_pci_dev(dev), mask);
  22 }
  23
  24 static inline int
  25 dma_set_mask(struct device *dev, u64 dma_mask)
  26 {
  27         BUG_ON(dev->bus != &pci_bus_type &&
  28                dev->bus != &ebus_bus_type);
  29
  30         return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
  31 }
  32
  33 static inline void *
  34 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
  35                    gfp_t flag)
  36 {
  37         BUG_ON(dev->bus != &pci_bus_type &&
  38                dev->bus != &ebus_bus_type);
  39
  40         return pci_iommu_ops->alloc_consistent(to_pci_dev(dev), size, dma_handle, flag);
  41 }
  42
  43 static inline void
  44 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
  45                     dma_addr_t dma_handle)
  46 {
  47         BUG_ON(dev->bus != &pci_bus_type &&
  48                dev->bus != &ebus_bus_type);
  49
  50         pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
  51 }
  52
  53 static inline dma_addr_t
  54 dma_map_single(struct device *dev, void *cpu_addr, size_t size,
  55                enum dma_data_direction direction)
  56 {
  57         BUG_ON(dev->bus != &pci_bus_type &&
  58                dev->bus != &ebus_bus_type);
  59
  60         return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
  61 }
  62
  63 static inline void
  64 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
  65                  enum dma_data_direction direction)
  66 {
  67         BUG_ON(dev->bus != &pci_bus_type &&
  68                dev->bus != &ebus_bus_type);
  69
  70         pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
  71 }
  72
  73 static inline dma_addr_t
  74 dma_map_page(struct device *dev, struct page *page,
  75              unsigned long offset, size_t size,
  76              enum dma_data_direction direction)
  77 {
  78         BUG_ON(dev->bus != &pci_bus_type &&
  79                dev->bus != &ebus_bus_type);
  80
  81         return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
  82 }
  83
  84 static inline void
  85 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
  86                enum dma_data_direction direction)
  87 {
  88         BUG_ON(dev->bus != &pci_bus_type &&
  89                dev->bus != &ebus_bus_type);
  90
  91         pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
  92 }
  93
  94 static inline int
  95 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  96            enum dma_data_direction direction)
  97 {
  98         BUG_ON(dev->bus != &pci_bus_type &&
  99                dev->bus != &ebus_bus_type);
 100
 101         return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
 102 }
 103
 104 static inline void
 105 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
 106              enum dma_data_direction direction)
 107 {
 108         BUG_ON(dev->bus != &pci_bus_type &&
 109                dev->bus != &ebus_bus_type);
 110
 111         pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
 112 }
 113
 114 static inline void
 115 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
 116                         enum dma_data_direction direction)
 117 {
 118         BUG_ON(dev->bus != &pci_bus_type &&
 119                dev->bus != &ebus_bus_type);
 120
 121         pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
 122                                     size, (int)direction);
 123 }
 124
 125 static inline void
 126 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
 127                            enum dma_data_direction direction)
 128 {
 129         BUG_ON(dev->bus != &pci_bus_type &&
 130                dev->bus != &ebus_bus_type);
 131
 132         pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
 133                                        size, (int)direction);
 134 }
 135
 136 static inline void
 137 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
 138                     enum dma_data_direction direction)
 139 {
 140         BUG_ON(dev->bus != &pci_bus_type &&
 141                dev->bus != &ebus_bus_type);
 142
 143         pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction);
 144 }
 145
 146 static inline void
 147 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
 148                        enum dma_data_direction direction)
 149 {
 150         BUG_ON(dev->bus != &pci_bus_type &&
 151                dev->bus != &ebus_bus_type);
 152
 153         pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction);
 154 }
 155
 156 static inline int
 157 dma_mapping_error(dma_addr_t dma_addr)
 158 {
 159         return pci_dma_mapping_error(dma_addr);
 160 }
 161
 162 #else
 163
 164 struct device;
 165 struct page;
 166 struct scatterlist;
 167
 168 static inline int
 169 dma_supported(struct device *dev, u64 mask)
 170 {
 171         BUG();
 172         return 0;
 173 }
 174
 175 static inline int
 176 dma_set_mask(struct device *dev, u64 dma_mask)
 177 {
 178         BUG();
 179         return 0;
 180 }
 181
 182 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 183                          dma_addr_t *dma_handle, gfp_t flag)
 184 {
 185         BUG();
 186         return NULL;
 187 }
 188
 189 static inline void dma_free_coherent(struct device *dev, size_t size,
 190                        void *vaddr, dma_addr_t dma_handle)
 191 {
 192         BUG();
 193 }
 194
 195 static inline dma_addr_t
 196 dma_map_single(struct device *dev, void *cpu_addr, size_t size,
 197                enum dma_data_direction direction)
 198 {
 199         BUG();
 200         return 0;
 201 }
 202
 203 static inline void
 204 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
 205                  enum dma_data_direction direction)
 206 {
 207         BUG();
 208 }
 209
 210 static inline dma_addr_t
 211 dma_map_page(struct device *dev, struct page *page,
 212              unsigned long offset, size_t size,
 213              enum dma_data_direction direction)
 214 {
 215         BUG();
 216         return 0;
 217 }
 218
 219 static inline void
 220 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
 221                enum dma_data_direction direction)
 222 {
 223         BUG();
 224 }
 225
 226 static inline int
 227 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 228            enum dma_data_direction direction)
 229 {
 230         BUG();
 231         return 0;
 232 }
 233
 234 static inline void
 235 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
 236              enum dma_data_direction direction)
 237 {
 238         BUG();
 239 }
 240
 241 static inline void
 242 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
 243                         enum dma_data_direction direction)
 244 {
 245         BUG();
 246 }
 247
 248 static inline void
 249 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
 250                            enum dma_data_direction direction)
 251 {
 252         BUG();
 253 }
 254
 255 static inline void
 256 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
 257                     enum dma_data_direction direction)
 258 {
 259         BUG();
 260 }
 261
 262 static inline void
 263 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
 264                        enum dma_data_direction direction)
 265 {
 266         BUG();
 267 }
 268
 269 static inline int
 270 dma_mapping_error(dma_addr_t dma_addr)
 271 {
 272         BUG();
 273         return 0;
 274 }
 275
 276 #endif /* PCI */
 277
 278
 279 /* Now for the API extensions over the pci_ one */
 280
 281 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 282 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 283 #define dma_is_consistent(d, h) (1)
 284
 285 static inline int
 286 dma_get_cache_alignment(void)
 287 {
 288         /* no easy way to get cache size on all processors, so return
 289          * the maximum possible, to be safe */
 290         return (1 << INTERNODE_CACHE_SHIFT);
 291 }
 292
 293 static inline void
 294 dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
 295                               unsigned long offset, size_t size,
 296                               enum dma_data_direction direction)
 297 {
 298         /* just sync everything, that's all the pci API can do */
 299         dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction);
 300 }
 301
 302 static inline void
 303 dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
 304                                  unsigned long offset, size_t size,
 305                                  enum dma_data_direction direction)
 306 {
 307         /* just sync everything, that's all the pci API can do */
 308         dma_sync_single_for_device(dev, dma_handle, offset+size, direction);
 309 }
 310
 311 static inline void
 312 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 313                enum dma_data_direction direction)
 314 {
 315         /* could define this in terms of the dma_cache ... operations,
 316          * but if you get this on a platform, you should convert the platform
 317          * to using the generic device DMA API */
 318         BUG();
 319 }
 320
 321 #endif /* _ASM_SPARC64_DMA_MAPPING_H */