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

   1 /*
   2  * Copyright (C) 2006 Atmark Techno, Inc.
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License. See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  */
   8
   9 #ifndef _ASM_MICROBLAZE_DMA_MAPPING_H
  10 #define _ASM_MICROBLAZE_DMA_MAPPING_H
  11
  12 #include <asm/cacheflush.h>
  13 #include <linux/io.h>
  14 #include <linux/bug.h>
  15
  16 struct scatterlist;
  17
  18 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
  19 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
  20
  21 /* FIXME */
  22 static inline int
  23 dma_supported(struct device *dev, u64 mask)
  24 {
  25         return 1;
  26 }
  27
  28 static inline dma_addr_t
  29 dma_map_page(struct device *dev, struct page *page,
  30         unsigned long offset, size_t size,
  31         enum dma_data_direction direction)
  32 {
  33         BUG();
  34         return 0;
  35 }
  36
  37 static inline void
  38 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
  39         enum dma_data_direction direction)
  40 {
  41         BUG();
  42 }
  43
  44 static inline int
  45 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  46         enum dma_data_direction direction)
  47 {
  48         BUG();
  49         return 0;
  50 }
  51
  52 static inline void
  53 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
  54         enum dma_data_direction direction)
  55 {
  56         BUG();
  57 }
  58
  59 static inline void
  60 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
  61                         enum dma_data_direction direction)
  62 {
  63         BUG();
  64 }
  65
  66 static inline void
  67 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
  68                 size_t size, enum dma_data_direction direction)
  69 {
  70         BUG();
  71 }
  72
  73 static inline void
  74 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
  75                 enum dma_data_direction direction)
  76 {
  77         BUG();
  78 }
  79
  80 static inline void
  81 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
  82                 enum dma_data_direction direction)
  83 {
  84         BUG();
  85 }
  86
  87 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
  88 {
  89         return 0;
  90 }
  91
  92 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
  93                                 dma_addr_t *dma_handle, int flag)
  94 {
  95         return NULL; /* consistent_alloc(flag, size, dma_handle); */
  96 }
  97
  98 static inline void dma_free_coherent(struct device *dev, size_t size,
  99                         void *vaddr, dma_addr_t dma_handle)
 100 {
 101         BUG();
 102 }
 103
 104 static inline dma_addr_t
 105 dma_map_single(struct device *dev, void *ptr, size_t size,
 106         enum dma_data_direction direction)
 107 {
 108         BUG_ON(direction == DMA_NONE);
 109
 110         return virt_to_bus(ptr);
 111 }
 112
 113 static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
 114                                     size_t size,
 115                                     enum dma_data_direction direction)
 116 {
 117         switch (direction) {
 118         case DMA_FROM_DEVICE:
 119                 flush_dcache_range((unsigned)dma_addr,
 120                         (unsigned)dma_addr + size);
 121                         /* Fall through */
 122         case DMA_TO_DEVICE:
 123                 break;
 124         default:
 125                 BUG();
 126         }
 127 }
 128
 129 #endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */