release/src-rt-6.x.4708/linux/linux-2.6.36/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
  15 extern struct dma_map_ops *dma_ops, pci32_dma_ops;
  16 extern struct bus_type pci_bus_type;
  17
  18 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  19 {
  20 #if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
  21         if (dev->bus == &pci_bus_type)
  22                 return &pci32_dma_ops;
  23 #endif
  24         return dma_ops;
  25 }
  26
  27 #include <asm-generic/dma-mapping-common.h>
  28
  29 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  30                                        dma_addr_t *dma_handle, gfp_t flag)
  31 {
  32         struct dma_map_ops *ops = get_dma_ops(dev);
  33         void *cpu_addr;
  34
  35         cpu_addr = ops->alloc_coherent(dev, size, dma_handle, flag);
  36         debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
  37         return cpu_addr;
  38 }
  39
  40 static inline void dma_free_coherent(struct device *dev, size_t size,
  41                                      void *cpu_addr, dma_addr_t dma_handle)
  42 {
  43         struct dma_map_ops *ops = get_dma_ops(dev);
  44
  45         debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
  46         ops->free_coherent(dev, size, cpu_addr, dma_handle);
  47 }
  48
  49 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
  50 {
  51         return (dma_addr == DMA_ERROR_CODE);
  52 }
  53
  54 static inline int dma_set_mask(struct device *dev, u64 mask)
  55 {
  56 #ifdef CONFIG_PCI
  57         if (dev->bus == &pci_bus_type) {
  58                 if (!dev->dma_mask || !dma_supported(dev, mask))
  59                         return -EINVAL;
  60                 *dev->dma_mask = mask;
  61                 return 0;
  62         }
  63 #endif
  64         return -EINVAL;
  65 }
  66
  67 #endif