LXR linux/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
  10extern 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
  15extern struct dma_map_ops *dma_ops;
  16extern struct dma_map_ops *leon_dma_ops;
  17extern struct dma_map_ops pci32_dma_ops;
  18
  19extern struct bus_type pci_bus_type;
  20
  21static inline struct dma_map_ops *get_dma_ops(struct device *dev)
  22{
  23#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
  24        if (sparc_cpu_model == sparc_leon)
  25                return leon_dma_ops;
  26        else if (dev->bus == &pci_bus_type)
  27                return &pci32_dma_ops;
  28#endif
  29        return dma_ops;
  30}
  31
  32#include <asm-generic/dma-mapping-common.h>
  33
  34#define dma_alloc_coherent(d,s,h,f)     dma_alloc_attrs(d,s,h,f,NULL)
  35
  36static inline void *dma_alloc_attrs(struct device *dev, size_t size,
  37                                    dma_addr_t *dma_handle, gfp_t flag,
  38                                    struct dma_attrs *attrs)
  39{
  40        struct dma_map_ops *ops = get_dma_ops(dev);
  41        void *cpu_addr;
  42
  43        cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs);
  44        debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
  45        return cpu_addr;
  46}
  47
  48#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
  49
  50static inline void dma_free_attrs(struct device *dev, size_t size,
  51                                  void *cpu_addr, dma_addr_t dma_handle,
  52                                  struct dma_attrs *attrs)
  53{
  54        struct dma_map_ops *ops = get_dma_ops(dev);
  55
  56        debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
  57        ops->free(dev, size, cpu_addr, dma_handle, attrs);
  58}
  59
  60static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
  61{
  62        debug_dma_mapping_error(dev, dma_addr);
  63        return (dma_addr == DMA_ERROR_CODE);
  64}
  65
  66static inline int dma_set_mask(struct device *dev, u64 mask)
  67{
  68#ifdef CONFIG_PCI
  69        if (dev->bus == &pci_bus_type) {
  70                if (!dev->dma_mask || !dma_supported(dev, mask))
  71                        return -EINVAL;
  72                *dev->dma_mask = mask;
  73                return 0;
  74        }
  75#endif
  76        return -EINVAL;
  77}
  78
  79#endif
  80