LXR linux/arch/sh/include/asm/dma-mapping.h

   1#ifndef __ASM_SH_DMA_MAPPING_H
   2#define __ASM_SH_DMA_MAPPING_H
   3
   4extern struct dma_map_ops *dma_ops;
   5extern void no_iommu_init(void);
   6
   7static inline struct dma_map_ops *get_dma_ops(struct device *dev)
   8{
   9        return dma_ops;
  10}
  11
  12#include <asm-generic/dma-coherent.h>
  13#include <asm-generic/dma-mapping-common.h>
  14
  15static inline int dma_supported(struct device *dev, u64 mask)
  16{
  17        struct dma_map_ops *ops = get_dma_ops(dev);
  18
  19        if (ops->dma_supported)
  20                return ops->dma_supported(dev, mask);
  21
  22        return 1;
  23}
  24
  25static inline int dma_set_mask(struct device *dev, u64 mask)
  26{
  27        struct dma_map_ops *ops = get_dma_ops(dev);
  28
  29        if (!dev->dma_mask || !dma_supported(dev, mask))
  30                return -EIO;
  31        if (ops->set_dma_mask)
  32                return ops->set_dma_mask(dev, mask);
  33
  34        *dev->dma_mask = mask;
  35
  36        return 0;
  37}
  38
  39void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
  40                    enum dma_data_direction dir);
  41
  42#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  43#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  44
  45static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
  46{
  47        struct dma_map_ops *ops = get_dma_ops(dev);
  48
  49        if (ops->mapping_error)
  50                return ops->mapping_error(dev, dma_addr);
  51
  52        return dma_addr == 0;
  53}
  54
  55static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  56                                       dma_addr_t *dma_handle, gfp_t gfp)
  57{
  58        struct dma_map_ops *ops = get_dma_ops(dev);
  59        void *memory;
  60
  61        if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
  62                return memory;
  63        if (!ops->alloc_coherent)
  64                return NULL;
  65
  66        memory = ops->alloc_coherent(dev, size, dma_handle, gfp);
  67        debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
  68
  69        return memory;
  70}
  71
  72static inline void dma_free_coherent(struct device *dev, size_t size,
  73                                     void *vaddr, dma_addr_t dma_handle)
  74{
  75        struct dma_map_ops *ops = get_dma_ops(dev);
  76
  77        if (dma_release_from_coherent(dev, get_order(size), vaddr))
  78                return;
  79
  80        debug_dma_free_coherent(dev, size, vaddr, dma_handle);
  81        if (ops->free_coherent)
  82                ops->free_coherent(dev, size, vaddr, dma_handle);
  83}
  84
  85/* arch/sh/mm/consistent.c */
  86extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
  87                                        dma_addr_t *dma_addr, gfp_t flag);
  88extern void dma_generic_free_coherent(struct device *dev, size_t size,
  89                                      void *vaddr, dma_addr_t dma_handle);
  90
  91#endif /* __ASM_SH_DMA_MAPPING_H */
  92