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