kernel/2.6.29.6-aldebaran-rt/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
  12 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
  13
  14 extern struct dma_map_ops *dma_ops;
  15 extern struct ia64_machine_vector ia64_mv;
  16 extern void set_iommu_machvec(void);
  17
  18 extern void machvec_dma_sync_single(struct device *, dma_addr_t, size_t,
  19                                     enum dma_data_direction);
  20 extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
  21                                 enum dma_data_direction);
  22
  23 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  24                                        dma_addr_t *daddr, gfp_t gfp)
  25 {
  26         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  27         return ops->alloc_coherent(dev, size, daddr, gfp);
  28 }
  29
  30 static inline void dma_free_coherent(struct device *dev, size_t size,
  31                                      void *caddr, dma_addr_t daddr)
  32 {
  33         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  34         ops->free_coherent(dev, size, caddr, daddr);
  35 }
  36
  37 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  38 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  39
  40 static inline dma_addr_t dma_map_single_attrs(struct device *dev,
  41                                               void *caddr, size_t size,
  42                                               enum dma_data_direction dir,
  43                                               struct dma_attrs *attrs)
  44 {
  45         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  46         return ops->map_page(dev, virt_to_page(caddr),
  47                              (unsigned long)caddr & ~PAGE_MASK, size,
  48                              dir, attrs);
  49 }
  50
  51 static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t daddr,
  52                                           size_t size,
  53                                           enum dma_data_direction dir,
  54                                           struct dma_attrs *attrs)
  55 {
  56         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  57         ops->unmap_page(dev, daddr, size, dir, attrs);
  58 }
  59
  60 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
  61 #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
  62
  63 static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl,
  64                                    int nents, enum dma_data_direction dir,
  65                                    struct dma_attrs *attrs)
  66 {
  67         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  68         return ops->map_sg(dev, sgl, nents, dir, attrs);
  69 }
  70
  71 static inline void dma_unmap_sg_attrs(struct device *dev,
  72                                       struct scatterlist *sgl, int nents,
  73                                       enum dma_data_direction dir,
  74                                       struct dma_attrs *attrs)
  75 {
  76         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  77         ops->unmap_sg(dev, sgl, nents, dir, attrs);
  78 }
  79
  80 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
  81 #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
  82
  83 static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t daddr,
  84                                            size_t size,
  85                                            enum dma_data_direction dir)
  86 {
  87         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  88         ops->sync_single_for_cpu(dev, daddr, size, dir);
  89 }
  90
  91 static inline void dma_sync_sg_for_cpu(struct device *dev,
  92                                        struct scatterlist *sgl,
  93                                        int nents, enum dma_data_direction dir)
  94 {
  95         struct dma_map_ops *ops = platform_dma_get_ops(dev);
  96         ops->sync_sg_for_cpu(dev, sgl, nents, dir);
  97 }
  98
  99 static inline void dma_sync_single_for_device(struct device *dev,
 100                                               dma_addr_t daddr,
 101                                               size_t size,
 102                                               enum dma_data_direction dir)
 103 {
 104         struct dma_map_ops *ops = platform_dma_get_ops(dev);
 105         ops->sync_single_for_device(dev, daddr, size, dir);
 106 }
 107
 108 static inline void dma_sync_sg_for_device(struct device *dev,
 109                                           struct scatterlist *sgl,
 110                                           int nents,
 111                                           enum dma_data_direction dir)
 112 {
 113         struct dma_map_ops *ops = platform_dma_get_ops(dev);
 114         ops->sync_sg_for_device(dev, sgl, nents, dir);
 115 }
 116
 117 static inline int dma_mapping_error(struct device *dev, dma_addr_t daddr)
 118 {
 119         struct dma_map_ops *ops = platform_dma_get_ops(dev);
 120         return ops->mapping_error(dev, daddr);
 121 }
 122
 123 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
 124                                       size_t offset, size_t size,
 125                                       enum dma_data_direction dir)
 126 {
 127         struct dma_map_ops *ops = platform_dma_get_ops(dev);
 128         return ops->map_page(dev, page, offset, size, dir, NULL);
 129 }
 130
 131 static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
 132                                   size_t size, enum dma_data_direction dir)
 133 {
 134         dma_unmap_single(dev, addr, size, dir);
 135 }
 136
 137 /*
 138  * Rest of this file is part of the "Advanced DMA API".  Use at your own risk.
 139  * See Documentation/DMA-API.txt for details.
 140  */
 141
 142 #define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir)       \
 143         dma_sync_single_for_cpu(dev, dma_handle, size, dir)
 144 #define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir)    \
 145         dma_sync_single_for_device(dev, dma_handle, size, dir)
 146
 147 static inline int dma_supported(struct device *dev, u64 mask)
 148 {
 149         struct dma_map_ops *ops = platform_dma_get_ops(dev);
 150         return ops->dma_supported(dev, mask);
 151 }
 152
 153 static inline int
 154 dma_set_mask (struct device *dev, u64 mask)
 155 {
 156         if (!dev->dma_mask || !dma_supported(dev, mask))
 157                 return -EIO;
 158         *dev->dma_mask = mask;
 159         return 0;
 160 }
 161
 162 extern int dma_get_cache_alignment(void);
 163
 164 static inline void
 165 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
 166         enum dma_data_direction dir)
 167 {
 168         /*
 169          * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
 170          * ensure that dma_cache_sync() enforces order, hence the mb().
 171          */
 172         mb();
 173 }
 174
 175 #define dma_is_consistent(d, h) (1)     /* all we do is coherent memory... */
 176
 177 #endif /* _ASM_IA64_DMA_MAPPING_H */