include/asm-ia64/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
  11 #define dma_alloc_coherent      platform_dma_alloc_coherent
  12 /* coherent mem. is cheap */
  13 static inline void *
  14 dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
  15                       gfp_t flag)
  16 {
  17         return dma_alloc_coherent(dev, size, dma_handle, flag);
  18 }
  19 #define dma_free_coherent       platform_dma_free_coherent
  20 static inline void
  21 dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
  22                      dma_addr_t dma_handle)
  23 {
  24         dma_free_coherent(dev, size, cpu_addr, dma_handle);
  25 }
  26 #define dma_map_single          platform_dma_map_single
  27 #define dma_map_sg              platform_dma_map_sg
  28 #define dma_unmap_single        platform_dma_unmap_single
  29 #define dma_unmap_sg            platform_dma_unmap_sg
  30 #define dma_sync_single_for_cpu platform_dma_sync_single_for_cpu
  31 #define dma_sync_sg_for_cpu     platform_dma_sync_sg_for_cpu
  32 #define dma_sync_single_for_device platform_dma_sync_single_for_device
  33 #define dma_sync_sg_for_device  platform_dma_sync_sg_for_device
  34 #define dma_mapping_error       platform_dma_mapping_error
  35
  36 #define dma_map_page(dev, pg, off, size, dir)                           \
  37         dma_map_single(dev, page_address(pg) + (off), (size), (dir))
  38 #define dma_unmap_page(dev, dma_addr, size, dir)                        \
  39         dma_unmap_single(dev, dma_addr, size, dir)
  40
  41 /*
  42  * Rest of this file is part of the "Advanced DMA API".  Use at your own risk.
  43  * See Documentation/DMA-API.txt for details.
  44  */
  45
  46 #define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir)       \
  47         dma_sync_single_for_cpu(dev, dma_handle, size, dir)
  48 #define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir)    \
  49         dma_sync_single_for_device(dev, dma_handle, size, dir)
  50
  51 #define dma_supported           platform_dma_supported
  52
  53 static inline int
  54 dma_set_mask (struct device *dev, u64 mask)
  55 {
  56         if (!dev->dma_mask || !dma_supported(dev, mask))
  57                 return -EIO;
  58         *dev->dma_mask = mask;
  59         return 0;
  60 }
  61
  62 extern int dma_get_cache_alignment(void);
  63
  64 static inline void
  65 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
  66         enum dma_data_direction dir)
  67 {
  68         /*
  69          * IA-64 is cache-coherent, so this is mostly a no-op.  However, we do need to
  70          * ensure that dma_cache_sync() enforces order, hence the mb().
  71          */
  72         mb();
  73 }
  74
  75 #define dma_is_consistent(d, h) (1)     /* all we do is coherent memory... */
  76
  77 #endif /* _ASM_IA64_DMA_MAPPING_H */