arch/ia64/include/asm/dma-mapping.h

   1 #ifndef _ASM_IA64_DMA_MAPPING_H
   2 #define _ASM_IA64_DMA_MAPPING_H
   3
   4 /*
   5  * Copyright (C) 2003-2004 Hewlett-Packard Co
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  */
   8 #include <asm/machvec.h>
   9 #include <linux/scatterlist.h>
  10 #include <asm/swiotlb.h>
  11 #include <linux/dma-debug.h>
  12
  13 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
  14
  15 extern struct dma_map_ops *dma_ops;
  16 extern struct ia64_machine_vector ia64_mv;
  17 extern void set_iommu_machvec(void);
  18
  19 extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
  20                                     enum dma_data_direction);
  21 extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
  22                                 enum dma_data_direction);
  23
  24 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  25                                        dma_addr_t *daddr, gfp_t gfp)
  26 {
  27         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  28         void *caddr;
  29
  30         caddr = ops->alloc_coherent(dev, size, daddr, gfp);
  31         debug_dma_alloc_coherent(dev, size, *daddr, caddr);
  32         return caddr;
  33 }
  34
  35 static inline void dma_free_coherent(struct device *dev, size_t size,
  36                                      void *caddr, dma_addr_t daddr)
  37 {
  38         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  39         debug_dma_free_coherent(dev, size, caddr, daddr);
  40         ops->free_coherent(dev, size, caddr, daddr);
  41 }
  42
  43 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  44 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  45
  46 #define get_dma_ops(dev) platform_dma_get_ops(dev)
  47
  48 #include <asm-generic/dma-mapping-common.h>
  49
  50 static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
  51 {
  52         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  53         return ops->mapping_error(dev, daddr);
  54 }
  55
  56 static inline int dma_supported(struct device *dev, u64 mask)
  57 {
  58         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  59         return ops->dma_supported(dev, mask);
  60 }
  61
  62 static inline int
  63 dma_set_mask (struct device *dev, u64 mask)
  64 {
  65         if (!dev->dma_mask || !dma_supported(dev, mask))
  66                 return -EIO;
  67         *dev->dma_mask = mask;
  68         return 0;
  69 }
  70
  71 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  72 {
  73         if (!dev->dma_mask)
  74                 return 0;
  75
  76         return addr + size - 1 <= *dev->dma_mask;
  77 }
  78
  79 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
  80 {
  81         return paddr;
  82 }
  83
  84 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
  85 {
  86         return daddr;
  87 }
  88
  89 static inline void
  90 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
  91         enum dma_data_direction dir)
  92 {
  93         /*
  94          * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
  95          * ensure that dma_cache_sync() enforces order, hence the mb().
  96          */
  97         mb();
  98 }
  99
 100 #endif /* _ASM_IA64_DMA_MAPPING_H */