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 #define DMA_ERROR_CODE 0
  16
  17 extern struct dma_map_ops *dma_ops;
  18 extern struct ia64_machine_vector ia64_mv;
  19 extern void set_iommu_machvec(void);
  20
  21 extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
  22                                     enum dma_data_direction);
  23 extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
  24                                 enum dma_data_direction);
  25
  26 #define dma_alloc_coherent(d,s,h,f)     dma_alloc_attrs(d,s,h,f,NULL)
  27
  28 static inline void *dma_alloc_attrs(struct device *dev, size_t size,
  29                                     dma_addr_t *daddr, gfp_t gfp,
  30                                     struct dma_attrs *attrs)
  31 {
  32         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  33         void *caddr;
  34
  35         caddr = ops->alloc(dev, size, daddr, gfp, attrs);
  36         debug_dma_alloc_coherent(dev, size, *daddr, caddr);
  37         return caddr;
  38 }
  39
  40 #define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
  41
  42 static inline void dma_free_attrs(struct device *dev, size_t size,
  43                                   void *caddr, dma_addr_t daddr,
  44                                   struct dma_attrs *attrs)
  45 {
  46         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  47         debug_dma_free_coherent(dev, size, caddr, daddr);
  48         ops->free(dev, size, caddr, daddr, attrs);
  49 }
  50
  51 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  52 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  53
  54 #define get_dma_ops(dev) platform_dma_get_ops(dev)
  55
  56 #include <asm-generic/dma-mapping-common.h>
  57
  58 static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
  59 {
  60         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  61         debug_dma_mapping_error(dev, daddr);
  62         return ops->mapping_error(dev, daddr);
  63 }
  64
  65 static inline int dma_supported(struct device *dev, u64 mask)
  66 {
  67         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  68         return ops->dma_supported(dev, mask);
  69 }
  70
  71 static inline int
  72 dma_set_mask (struct device *dev, u64 mask)
  73 {
  74         if (!dev->dma_mask || !dma_supported(dev, mask))
  75                 return -EIO;
  76         *dev->dma_mask = mask;
  77         return 0;
  78 }
  79
  80 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
  81 {
  82         if (!dev->dma_mask)
  83                 return 0;
  84
  85         return addr + size - 1 <= *dev->dma_mask;
  86 }
  87
  88 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
  89 {
  90         return paddr;
  91 }
  92
  93 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
  94 {
  95         return daddr;
  96 }
  97
  98 static inline void
  99 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
 100         enum dma_data_direction dir)
 101 {
 102         /*
 103          * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
 104          * ensure that dma_cache_sync() enforces order, hence the mb().
 105          */
 106         mb();
 107 }
 108
 109 #endif /* _ASM_IA64_DMA_MAPPING_H */