release/src-rt-6.x.4708/linux/linux-2.6.36/include/asm-generic/dma-mapping-common.h

   1 #ifndef _ASM_GENERIC_DMA_MAPPING_H
   2 #define _ASM_GENERIC_DMA_MAPPING_H
   3
   4 #include <linux/kmemcheck.h>
   5 #include <linux/scatterlist.h>
   6 #include <linux/dma-debug.h>
   7 #include <linux/dma-attrs.h>
   8
   9 static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
  10                                               size_t size,
  11                                               enum dma_data_direction dir,
  12                                               struct dma_attrs *attrs)
  13 {
  14         struct dma_map_ops *ops = get_dma_ops(dev);
  15         dma_addr_t addr;
  16
  17         kmemcheck_mark_initialized(ptr, size);
  18         BUG_ON(!valid_dma_direction(dir));
  19         addr = ops->map_page(dev, virt_to_page(ptr),
  20                              (unsigned long)ptr & ~PAGE_MASK, size,
  21                              dir, attrs);
  22         debug_dma_map_page(dev, virt_to_page(ptr),
  23                            (unsigned long)ptr & ~PAGE_MASK, size,
  24                            dir, addr, true);
  25         return addr;
  26 }
  27
  28 static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
  29                                           size_t size,
  30                                           enum dma_data_direction dir,
  31                                           struct dma_attrs *attrs)
  32 {
  33         struct dma_map_ops *ops = get_dma_ops(dev);
  34
  35         BUG_ON(!valid_dma_direction(dir));
  36         if (ops->unmap_page)
  37                 ops->unmap_page(dev, addr, size, dir, attrs);
  38         debug_dma_unmap_page(dev, addr, size, dir, true);
  39 }
  40
  41 static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
  42                                    int nents, enum dma_data_direction dir,
  43                                    struct dma_attrs *attrs)
  44 {
  45         struct dma_map_ops *ops = get_dma_ops(dev);
  46         int i, ents;
  47         struct scatterlist *s;
  48
  49         for_each_sg(sg, s, nents, i)
  50                 kmemcheck_mark_initialized(sg_virt(s), s->length);
  51         BUG_ON(!valid_dma_direction(dir));
  52         ents = ops->map_sg(dev, sg, nents, dir, attrs);
  53         debug_dma_map_sg(dev, sg, nents, ents, dir);
  54
  55         return ents;
  56 }
  57
  58 static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
  59                                       int nents, enum dma_data_direction dir,
  60                                       struct dma_attrs *attrs)
  61 {
  62         struct dma_map_ops *ops = get_dma_ops(dev);
  63
  64         BUG_ON(!valid_dma_direction(dir));
  65         debug_dma_unmap_sg(dev, sg, nents, dir);
  66         if (ops->unmap_sg)
  67                 ops->unmap_sg(dev, sg, nents, dir, attrs);
  68 }
  69
  70 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
  71                                       size_t offset, size_t size,
  72                                       enum dma_data_direction dir)
  73 {
  74         struct dma_map_ops *ops = get_dma_ops(dev);
  75         dma_addr_t addr;
  76
  77         kmemcheck_mark_initialized(page_address(page) + offset, size);
  78         BUG_ON(!valid_dma_direction(dir));
  79         addr = ops->map_page(dev, page, offset, size, dir, NULL);
  80         debug_dma_map_page(dev, page, offset, size, dir, addr, false);
  81
  82         return addr;
  83 }
  84
  85 static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
  86                                   size_t size, enum dma_data_direction dir)
  87 {
  88         struct dma_map_ops *ops = get_dma_ops(dev);
  89
  90         BUG_ON(!valid_dma_direction(dir));
  91         if (ops->unmap_page)
  92                 ops->unmap_page(dev, addr, size, dir, NULL);
  93         debug_dma_unmap_page(dev, addr, size, dir, false);
  94 }
  95
  96 static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
  97                                            size_t size,
  98                                            enum dma_data_direction dir)
  99 {
 100         struct dma_map_ops *ops = get_dma_ops(dev);
 101
 102         BUG_ON(!valid_dma_direction(dir));
 103         if (ops->sync_single_for_cpu)
 104                 ops->sync_single_for_cpu(dev, addr, size, dir);
 105         debug_dma_sync_single_for_cpu(dev, addr, size, dir);
 106 }
 107
 108 static inline void dma_sync_single_for_device(struct device *dev,
 109                                               dma_addr_t addr, size_t size,
 110                                               enum dma_data_direction dir)
 111 {
 112         struct dma_map_ops *ops = get_dma_ops(dev);
 113
 114         BUG_ON(!valid_dma_direction(dir));
 115         if (ops->sync_single_for_device)
 116                 ops->sync_single_for_device(dev, addr, size, dir);
 117         debug_dma_sync_single_for_device(dev, addr, size, dir);
 118 }
 119
 120 static inline void dma_sync_single_range_for_cpu(struct device *dev,
 121                                                  dma_addr_t addr,
 122                                                  unsigned long offset,
 123                                                  size_t size,
 124                                                  enum dma_data_direction dir)
 125 {
 126         dma_sync_single_for_cpu(dev, addr + offset, size, dir);
 127 }
 128
 129 static inline void dma_sync_single_range_for_device(struct device *dev,
 130                                                     dma_addr_t addr,
 131                                                     unsigned long offset,
 132                                                     size_t size,
 133                                                     enum dma_data_direction dir)
 134 {
 135         dma_sync_single_for_device(dev, addr + offset, size, dir);
 136 }
 137
 138 static inline void
 139 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
 140                     int nelems, enum dma_data_direction dir)
 141 {
 142         struct dma_map_ops *ops = get_dma_ops(dev);
 143
 144         BUG_ON(!valid_dma_direction(dir));
 145         if (ops->sync_sg_for_cpu)
 146                 ops->sync_sg_for_cpu(dev, sg, nelems, dir);
 147         debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
 148 }
 149
 150 static inline void
 151 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
 152                        int nelems, enum dma_data_direction dir)
 153 {
 154         struct dma_map_ops *ops = get_dma_ops(dev);
 155
 156         BUG_ON(!valid_dma_direction(dir));
 157         if (ops->sync_sg_for_device)
 158                 ops->sync_sg_for_device(dev, sg, nelems, dir);
 159         debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
 160
 161 }
 162
 163 #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
 164 #define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
 165 #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
 166 #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
 167
 168 #endif