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
 166 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 167                          dma_addr_t *dma_handle, gfp_t flag)
 168 {
 169         BUG();
 170         return NULL;
 171 }
 172
 173 static inline void dma_free_coherent(struct device *dev, size_t size,
 174                        void *vaddr, dma_addr_t dma_handle)
 175 {
 176         BUG();
 177 }
 178
 179 static inline void
 180 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
 181                         enum dma_data_direction direction)
 182 {
 183         BUG();
 184 }
 185
 186 static inline void
 187 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
 188                            enum dma_data_direction direction)
 189 {
 190         BUG();
 191 }
 192
 193 #endif /* PCI */
 194
 195
 196 /* Now for the API extensions over the pci_ one */
 197
 198 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 199 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 200 #define dma_is_consistent(d, h) (1)
 201
 202 static inline int
 203 dma_get_cache_alignment(void)
 204 {
 205         /* no easy way to get cache size on all processors, so return
 206          * the maximum possible, to be safe */
 207         return (1 << INTERNODE_CACHE_SHIFT);
 208 }
 209
 210 static inline void
 211 dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
 212                               unsigned long offset, size_t size,
 213                               enum dma_data_direction direction)
 214 {
 215         /* just sync everything, that's all the pci API can do */
 216         dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction);
 217 }
 218
 219 static inline void
 220 dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
 221                                  unsigned long offset, size_t size,
 222                                  enum dma_data_direction direction)
 223 {
 224         /* just sync everything, that's all the pci API can do */
 225         dma_sync_single_for_device(dev, dma_handle, offset+size, direction);
 226 }
 227
 228 static inline void
 229 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 230                enum dma_data_direction direction)
 231 {
 232         /* could define this in terms of the dma_cache ... operations,
 233          * but if you get this on a platform, you should convert the platform
 234          * to using the generic device DMA API */
 235         BUG();
 236 }
 237
 238 #endif /* _ASM_SPARC64_DMA_MAPPING_H */