arch/sparc/include/asm/dma-mapping.h

   1 #ifndef ___ASM_SPARC_DMA_MAPPING_H
   2 #define ___ASM_SPARC_DMA_MAPPING_H
   3
   4 #include <linux/scatterlist.h>
   5 #include <linux/mm.h>
   6 #include <linux/dma-debug.h>
   7
   8 #define DMA_ERROR_CODE  (~(dma_addr_t)0x0)
   9
  10 extern int dma_supported(struct device *dev, u64 mask);
  11
  12 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  13 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  14 #define dma_is_consistent(d, h) (1)
  15
  16 extern struct dma_map_ops *dma_ops, pci32_dma_ops;
  17 extern struct bus_type pci_bus_type;
  18
  19 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  20 {
  21 #if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
  22         if (dev->bus == &pci_bus_type)
  23                 return &pci32_dma_ops;
  24 #endif
  25         return dma_ops;
  26 }
  27
  28 #include <asm-generic/dma-mapping-common.h>
  29
  30 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  31                                        dma_addr_t *dma_handle, gfp_t flag)
  32 {
  33         struct dma_map_ops *ops = get_dma_ops(dev);
  34         void *cpu_addr;
  35
  36         cpu_addr = ops->alloc_coherent(dev, size, dma_handle, flag);
  37         debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
  38         return cpu_addr;
  39 }
  40
  41 static inline void dma_free_coherent(struct device *dev, size_t size,
  42                                      void *cpu_addr, dma_addr_t dma_handle)
  43 {
  44         struct dma_map_ops *ops = get_dma_ops(dev);
  45
  46         debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
  47         ops->free_coherent(dev, size, cpu_addr, dma_handle);
  48 }
  49
  50 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
  51 {
  52         return (dma_addr == DMA_ERROR_CODE);
  53 }
  54
  55 static inline int dma_set_mask(struct device *dev, u64 mask)
  56 {
  57 #ifdef CONFIG_PCI
  58         if (dev->bus == &pci_bus_type) {
  59                 if (!dev->dma_mask || !dma_supported(dev, mask))
  60                         return -EINVAL;
  61                 *dev->dma_mask = mask;
  62                 return 0;
  63         }
  64 #endif
  65         return -EINVAL;
  66 }
  67
  68 #endif