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   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 struct dma_mapping_ops {
  15         int             (*mapping_error)(struct device *dev,
  16                                          dma_addr_t dma_addr);
  17         void*           (*alloc_coherent)(struct device *dev, size_t size,
  18                                 dma_addr_t *dma_handle, gfp_t gfp);
  19         void            (*free_coherent)(struct device *dev, size_t size,
  20                                 void *vaddr, dma_addr_t dma_handle);
  21         dma_addr_t      (*map_single)(struct device *hwdev, unsigned long ptr,
  22                                 size_t size, int direction);
  23         void            (*unmap_single)(struct device *dev, dma_addr_t addr,
  24                                 size_t size, int direction);
  25         void            (*sync_single_for_cpu)(struct device *hwdev,
  26                                 dma_addr_t dma_handle, size_t size,
  27                                 int direction);
  28         void            (*sync_single_for_device)(struct device *hwdev,
  29                                 dma_addr_t dma_handle, size_t size,
  30                                 int direction);
  31         void            (*sync_single_range_for_cpu)(struct device *hwdev,
  32                                 dma_addr_t dma_handle, unsigned long offset,
  33                                 size_t size, int direction);
  34         void            (*sync_single_range_for_device)(struct device *hwdev,
  35                                 dma_addr_t dma_handle, unsigned long offset,
  36                                 size_t size, int direction);
  37         void            (*sync_sg_for_cpu)(struct device *hwdev,
  38                                 struct scatterlist *sg, int nelems,
  39                                 int direction);
  40         void            (*sync_sg_for_device)(struct device *hwdev,
  41                                 struct scatterlist *sg, int nelems,
  42                                 int direction);
  43         int             (*map_sg)(struct device *hwdev, struct scatterlist *sg,
  44                                 int nents, int direction);
  45         void            (*unmap_sg)(struct device *hwdev,
  46                                 struct scatterlist *sg, int nents,
  47                                 int direction);
  48         int             (*dma_supported_op)(struct device *hwdev, u64 mask);
  49         int             is_phys;
  50 };
  51
  52 extern struct dma_mapping_ops *dma_ops;
  53 extern struct ia64_machine_vector ia64_mv;
  54 extern void set_iommu_machvec(void);
  55
  56 #define dma_alloc_coherent(dev, size, handle, gfp)      \
  57         platform_dma_alloc_coherent(dev, size, handle, (gfp) | GFP_DMA)
  58
  59 /* coherent mem. is cheap */
  60 static inline void *
  61 dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
  62                       gfp_t flag)
  63 {
  64         return dma_alloc_coherent(dev, size, dma_handle, flag);
  65 }
  66 #define dma_free_coherent       platform_dma_free_coherent
  67 static inline void
  68 dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
  69                      dma_addr_t dma_handle)
  70 {
  71         dma_free_coherent(dev, size, cpu_addr, dma_handle);
  72 }
  73 #define dma_map_single_attrs    platform_dma_map_single_attrs
  74 static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
  75                                         size_t size, int dir)
  76 {
  77         return dma_map_single_attrs(dev, cpu_addr, size, dir, NULL);
  78 }
  79 #define dma_map_sg_attrs        platform_dma_map_sg_attrs
  80 static inline int dma_map_sg(struct device *dev, struct scatterlist *sgl,
  81                              int nents, int dir)
  82 {
  83         return dma_map_sg_attrs(dev, sgl, nents, dir, NULL);
  84 }
  85 #define dma_unmap_single_attrs  platform_dma_unmap_single_attrs
  86 static inline void dma_unmap_single(struct device *dev, dma_addr_t cpu_addr,
  87                                     size_t size, int dir)
  88 {
  89         return dma_unmap_single_attrs(dev, cpu_addr, size, dir, NULL);
  90 }
  91 #define dma_unmap_sg_attrs      platform_dma_unmap_sg_attrs
  92 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sgl,
  93                                 int nents, int dir)
  94 {
  95         return dma_unmap_sg_attrs(dev, sgl, nents, dir, NULL);
  96 }
  97 #define dma_sync_single_for_cpu platform_dma_sync_single_for_cpu
  98 #define dma_sync_sg_for_cpu     platform_dma_sync_sg_for_cpu
  99 #define dma_sync_single_for_device platform_dma_sync_single_for_device
 100 #define dma_sync_sg_for_device  platform_dma_sync_sg_for_device
 101 #define dma_mapping_error       platform_dma_mapping_error
 102
 103 #define dma_map_page(dev, pg, off, size, dir)                           \
 104         dma_map_single(dev, page_address(pg) + (off), (size), (dir))
 105 #define dma_unmap_page(dev, dma_addr, size, dir)                        \
 106         dma_unmap_single(dev, dma_addr, size, dir)
 107
 108 /*
 109  * Rest of this file is part of the "Advanced DMA API".  Use at your own risk.
 110  * See Documentation/DMA-API.txt for details.
 111  */
 112
 113 #define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir)       \
 114         dma_sync_single_for_cpu(dev, dma_handle, size, dir)
 115 #define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir)    \
 116         dma_sync_single_for_device(dev, dma_handle, size, dir)
 117
 118 #define dma_supported           platform_dma_supported
 119
 120 static inline int
 121 dma_set_mask (struct device *dev, u64 mask)
 122 {
 123         if (!dev->dma_mask || !dma_supported(dev, mask))
 124                 return -EIO;
 125         *dev->dma_mask = mask;
 126         return 0;
 127 }
 128
 129 extern int dma_get_cache_alignment(void);
 130
 131 static inline void
 132 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
 133         enum dma_data_direction dir)
 134 {
 135         /*
 136          * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
 137          * ensure that dma_cache_sync() enforces order, hence the mb().
 138          */
 139         mb();
 140 }
 141
 142 #define dma_is_consistent(d, h) (1)     /* all we do is coherent memory... */
 143
 144 static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
 145 {
 146         return dma_ops;
 147 }
 148
 149
 150
 151 #endif /* _ASM_IA64_DMA_MAPPING_H */