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 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
  15 extern struct dma_map_ops *dma_ops;
  16 extern struct dma_map_ops *leon_dma_ops;
  17 extern struct dma_map_ops pci32_dma_ops;
  18
  19 extern struct bus_type pci_bus_type;
  20
  21 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  22 {
  23 #ifdef CONFIG_SPARC_LEON
  24         if (sparc_cpu_model == sparc_leon)
  25                 return leon_dma_ops;
  26 #endif
  27 #if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
  28         if (dev->bus == &pci_bus_type)
  29                 return &pci32_dma_ops;
  30 #endif
  31         return dma_ops;
  32 }
  33
  34 #include <asm-generic/dma-mapping-common.h>
  35
  36 #define dma_alloc_coherent(d,s,h,f)     dma_alloc_attrs(d,s,h,f,NULL)
  37
  38 static inline void *dma_alloc_attrs(struct device *dev, size_t size,
  39                                     dma_addr_t *dma_handle, gfp_t flag,
  40                                     struct dma_attrs *attrs)
  41 {
  42         struct dma_map_ops *ops = get_dma_ops(dev);
  43         void *cpu_addr;
  44
  45         cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs);
  46         debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
  47         return cpu_addr;
  48 }
  49
  50 #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
  51
  52 static inline void dma_free_attrs(struct device *dev, size_t size,
  53                                   void *cpu_addr, dma_addr_t dma_handle,
  54                                   struct dma_attrs *attrs)
  55 {
  56         struct dma_map_ops *ops = get_dma_ops(dev);
  57
  58         debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
  59         ops->free(dev, size, cpu_addr, dma_handle, attrs);
  60 }
  61
  62 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
  63 {
  64         debug_dma_mapping_error(dev, dma_addr);
  65         return (dma_addr == DMA_ERROR_CODE);
  66 }
  67
  68 static inline int dma_set_mask(struct device *dev, u64 mask)
  69 {
  70 #ifdef CONFIG_PCI
  71         if (dev->bus == &pci_bus_type) {
  72                 if (!dev->dma_mask || !dma_supported(dev, mask))
  73                         return -EINVAL;
  74                 *dev->dma_mask = mask;
  75                 return 0;
  76         }
  77 #endif
  78         return -EINVAL;
  79 }
  80
  81 #endif