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 static inline int
  14 dma_supported(struct device *dev, u64 mask)
  15 {
  16         BUG_ON(dev->bus != &pci_bus_type);
  17
  18         return pci_dma_supported(to_pci_dev(dev), mask);
  19 }
  20
  21 static inline int
  22 dma_set_mask(struct device *dev, u64 dma_mask)
  23 {
  24         BUG_ON(dev->bus != &pci_bus_type);
  25
  26         return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
  27 }
  28
  29 static inline void *
  30 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
  31                    gfp_t flag)
  32 {
  33         BUG_ON(dev->bus != &pci_bus_type);
  34
  35         return pci_iommu_ops->alloc_consistent(to_pci_dev(dev), size, dma_handle, flag);
  36 }
  37
  38 static inline void
  39 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
  40                     dma_addr_t dma_handle)
  41 {
  42         BUG_ON(dev->bus != &pci_bus_type);
  43
  44         pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
  45 }
  46
  47 static inline dma_addr_t
  48 dma_map_single(struct device *dev, void *cpu_addr, size_t size,
  49                enum dma_data_direction direction)
  50 {
  51         BUG_ON(dev->bus != &pci_bus_type);
  52
  53         return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
  54 }
  55
  56 static inline void
  57 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
  58                  enum dma_data_direction direction)
  59 {
  60         BUG_ON(dev->bus != &pci_bus_type);
  61
  62         pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
  63 }
  64
  65 static inline dma_addr_t
  66 dma_map_page(struct device *dev, struct page *page,
  67              unsigned long offset, size_t size,
  68              enum dma_data_direction direction)
  69 {
  70         BUG_ON(dev->bus != &pci_bus_type);
  71
  72         return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
  73 }
  74
  75 static inline void
  76 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
  77                enum dma_data_direction direction)
  78 {
  79         BUG_ON(dev->bus != &pci_bus_type);
  80
  81         pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
  82 }
  83
  84 static inline int
  85 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  86            enum dma_data_direction direction)
  87 {
  88         BUG_ON(dev->bus != &pci_bus_type);
  89
  90         return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
  91 }
  92
  93 static inline void
  94 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
  95              enum dma_data_direction direction)
  96 {
  97         BUG_ON(dev->bus != &pci_bus_type);
  98
  99         pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
 100 }
 101
 102 static inline void
 103 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
 104                         enum dma_data_direction direction)
 105 {
 106         BUG_ON(dev->bus != &pci_bus_type);
 107
 108         pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
 109                                     size, (int)direction);
 110 }
 111
 112 static inline void
 113 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
 114                            enum dma_data_direction direction)
 115 {
 116         BUG_ON(dev->bus != &pci_bus_type);
 117
 118         pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
 119                                        size, (int)direction);
 120 }
 121
 122 static inline void
 123 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
 124                     enum dma_data_direction direction)
 125 {
 126         BUG_ON(dev->bus != &pci_bus_type);
 127
 128         pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction);
 129 }
 130
 131 static inline void
 132 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
 133                        enum dma_data_direction direction)
 134 {
 135         BUG_ON(dev->bus != &pci_bus_type);
 136
 137         pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction);
 138 }
 139
 140 static inline int
 141 dma_mapping_error(dma_addr_t dma_addr)
 142 {
 143         return pci_dma_mapping_error(dma_addr);
 144 }
 145
 146 #else
 147
 148 struct device;
 149
 150 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 151                          dma_addr_t *dma_handle, gfp_t flag)
 152 {
 153         BUG();
 154         return NULL;
 155 }
 156
 157 static inline void dma_free_coherent(struct device *dev, size_t size,
 158                        void *vaddr, dma_addr_t dma_handle)
 159 {
 160         BUG();
 161 }
 162
 163 static inline void
 164 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
 165                         enum dma_data_direction direction)
 166 {
 167         BUG();
 168 }
 169
 170 static inline void
 171 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
 172                            enum dma_data_direction direction)
 173 {
 174         BUG();
 175 }
 176
 177 #endif /* PCI */
 178
 179
 180 /* Now for the API extensions over the pci_ one */
 181
 182 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 183 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 184 #define dma_is_consistent(d)    (1)
 185
 186 static inline int
 187 dma_get_cache_alignment(void)
 188 {
 189         /* no easy way to get cache size on all processors, so return
 190          * the maximum possible, to be safe */
 191         return (1 << INTERNODE_CACHE_SHIFT);
 192 }
 193
 194 static inline void
 195 dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
 196                               unsigned long offset, size_t size,
 197                               enum dma_data_direction direction)
 198 {
 199         /* just sync everything, that's all the pci API can do */
 200         dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction);
 201 }
 202
 203 static inline void
 204 dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
 205                                  unsigned long offset, size_t size,
 206                                  enum dma_data_direction direction)
 207 {
 208         /* just sync everything, that's all the pci API can do */
 209         dma_sync_single_for_device(dev, dma_handle, offset+size, direction);
 210 }
 211
 212 static inline void
 213 dma_cache_sync(void *vaddr, size_t size,
 214                enum dma_data_direction direction)
 215 {
 216         /* could define this in terms of the dma_cache ... operations,
 217          * but if you get this on a platform, you should convert the platform
 218          * to using the generic device DMA API */
 219         BUG();
 220 }
 221
 222 #endif /* _ASM_SPARC64_DMA_MAPPING_H */