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