release/src-rt-6.x/linux/linux-2.6/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
  20         return pci_dma_supported(to_pci_dev(dev), mask);
  21 }
  22
  23 static inline int
  24 dma_set_mask(struct device *dev, u64 dma_mask)
  25 {
  26         BUG_ON(dev->bus != &pci_bus_type);
  27
  28         return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
  29 }
  30
  31 static inline void *
  32 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
  33                    gfp_t flag)
  34 {
  35         BUG_ON(dev->bus != &pci_bus_type);
  36
  37         return pci_iommu_ops->alloc_consistent(to_pci_dev(dev), size, dma_handle, flag);
  38 }
  39
  40 static inline void
  41 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
  42                     dma_addr_t dma_handle)
  43 {
  44         BUG_ON(dev->bus != &pci_bus_type);
  45
  46         pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
  47 }
  48
  49 static inline dma_addr_t
  50 dma_map_single(struct device *dev, void *cpu_addr, size_t size,
  51                enum dma_data_direction direction)
  52 {
  53         BUG_ON(dev->bus != &pci_bus_type);
  54
  55         return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
  56 }
  57
  58 static inline void
  59 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
  60                  enum dma_data_direction direction)
  61 {
  62         BUG_ON(dev->bus != &pci_bus_type);
  63
  64         pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
  65 }
  66
  67 static inline dma_addr_t
  68 dma_map_page(struct device *dev, struct page *page,
  69              unsigned long offset, size_t size,
  70              enum dma_data_direction direction)
  71 {
  72         BUG_ON(dev->bus != &pci_bus_type);
  73
  74         return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
  75 }
  76
  77 static inline void
  78 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
  79                enum dma_data_direction direction)
  80 {
  81         BUG_ON(dev->bus != &pci_bus_type);
  82
  83         pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
  84 }
  85
  86 static inline int
  87 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  88            enum dma_data_direction direction)
  89 {
  90         BUG_ON(dev->bus != &pci_bus_type);
  91
  92         return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
  93 }
  94
  95 static inline void
  96 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
  97              enum dma_data_direction direction)
  98 {
  99         BUG_ON(dev->bus != &pci_bus_type);
 100
 101         pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
 102 }
 103
 104 static inline void
 105 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
 106                         enum dma_data_direction direction)
 107 {
 108         BUG_ON(dev->bus != &pci_bus_type);
 109
 110         pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
 111                                     size, (int)direction);
 112 }
 113
 114 static inline void
 115 dma_sync_single_for_device(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
 120         pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
 121                                        size, (int)direction);
 122 }
 123
 124 static inline void
 125 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
 126                     enum dma_data_direction direction)
 127 {
 128         BUG_ON(dev->bus != &pci_bus_type);
 129
 130         pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction);
 131 }
 132
 133 static inline void
 134 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
 135                        enum dma_data_direction direction)
 136 {
 137         BUG_ON(dev->bus != &pci_bus_type);
 138
 139         pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction);
 140 }
 141
 142 static inline int
 143 dma_mapping_error(dma_addr_t dma_addr)
 144 {
 145         return pci_dma_mapping_error(dma_addr);
 146 }
 147
 148 #else
 149
 150 struct device;
 151 struct page;
 152 struct scatterlist;
 153
 154 static inline int
 155 dma_supported(struct device *dev, u64 mask)
 156 {
 157         BUG();
 158         return 0;
 159 }
 160
 161 static inline int
 162 dma_set_mask(struct device *dev, u64 dma_mask)
 163 {
 164         BUG();
 165         return 0;
 166 }
 167
 168 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 169                          dma_addr_t *dma_handle, gfp_t flag)
 170 {
 171         BUG();
 172         return NULL;
 173 }
 174
 175 static inline void dma_free_coherent(struct device *dev, size_t size,
 176                        void *vaddr, dma_addr_t dma_handle)
 177 {
 178         BUG();
 179 }
 180
 181 static inline dma_addr_t
 182 dma_map_single(struct device *dev, void *cpu_addr, size_t size,
 183                enum dma_data_direction direction)
 184 {
 185         BUG();
 186         return 0;
 187 }
 188
 189 static inline void
 190 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
 191                  enum dma_data_direction direction)
 192 {
 193         BUG();
 194 }
 195
 196 static inline dma_addr_t
 197 dma_map_page(struct device *dev, struct page *page,
 198              unsigned long offset, size_t size,
 199              enum dma_data_direction direction)
 200 {
 201         BUG();
 202         return 0;
 203 }
 204
 205 static inline void
 206 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
 207                enum dma_data_direction direction)
 208 {
 209         BUG();
 210 }
 211
 212 static inline int
 213 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 214            enum dma_data_direction direction)
 215 {
 216         BUG();
 217         return 0;
 218 }
 219
 220 static inline void
 221 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
 222              enum dma_data_direction direction)
 223 {
 224         BUG();
 225 }
 226
 227 static inline void
 228 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
 229                         enum dma_data_direction direction)
 230 {
 231         BUG();
 232 }
 233
 234 static inline void
 235 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
 236                            enum dma_data_direction direction)
 237 {
 238         BUG();
 239 }
 240
 241 static inline void
 242 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
 243                     enum dma_data_direction direction)
 244 {
 245         BUG();
 246 }
 247
 248 static inline void
 249 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
 250                        enum dma_data_direction direction)
 251 {
 252         BUG();
 253 }
 254
 255 static inline int
 256 dma_mapping_error(dma_addr_t dma_addr)
 257 {
 258         BUG();
 259         return 0;
 260 }
 261
 262 #endif /* PCI */
 263
 264
 265 /* Now for the API extensions over the pci_ one */
 266
 267 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 268 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 269 #define dma_is_consistent(d, h) (1)
 270
 271 static inline int
 272 dma_get_cache_alignment(void)
 273 {
 274         /* no easy way to get cache size on all processors, so return
 275          * the maximum possible, to be safe */
 276         return (1 << INTERNODE_CACHE_SHIFT);
 277 }
 278
 279 static inline void
 280 dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
 281                               unsigned long offset, size_t size,
 282                               enum dma_data_direction direction)
 283 {
 284         /* just sync everything, that's all the pci API can do */
 285         dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction);
 286 }
 287
 288 static inline void
 289 dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
 290                                  unsigned long offset, size_t size,
 291                                  enum dma_data_direction direction)
 292 {
 293         /* just sync everything, that's all the pci API can do */
 294         dma_sync_single_for_device(dev, dma_handle, offset+size, direction);
 295 }
 296
 297 static inline void
 298 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 299                enum dma_data_direction direction)
 300 {
 301         /* could define this in terms of the dma_cache ... operations,
 302          * but if you get this on a platform, you should convert the platform
 303          * to using the generic device DMA API */
 304         BUG();
 305 }
 306
 307 #endif /* _ASM_SPARC64_DMA_MAPPING_H */