include/asm-alpha/dma-mapping.h

   1 #ifndef _ALPHA_DMA_MAPPING_H
   2 #define _ALPHA_DMA_MAPPING_H
   3
   4 #include <linux/config.h>
   5
   6 #ifdef CONFIG_PCI
   7
   8 #include <linux/pci.h>
   9
  10 #define dma_map_single(dev, va, size, dir)              \
  11                 pci_map_single(alpha_gendev_to_pci(dev), va, size, dir)
  12 #define dma_unmap_single(dev, addr, size, dir)          \
  13                 pci_unmap_single(alpha_gendev_to_pci(dev), addr, size, dir)
  14 #define dma_alloc_coherent(dev, size, addr, gfp)        \
  15                 pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr)
  16 #define dma_free_coherent(dev, size, va, addr)          \
  17                 pci_free_consistent(alpha_gendev_to_pci(dev), size, va, addr)
  18 #define dma_map_page(dev, page, off, size, dir)         \
  19                 pci_map_single(alpha_gendev_to_pci(dev), page, off, size, dir)
  20 #define dma_unmap_page(dev, addr, size, dir)            \
  21                 pci_unmap_page(alpha_gendev_to_pci(dev), addr, size, dir)
  22 #define dma_map_sg(dev, sg, nents, dir)                 \
  23                 pci_map_sg(alpha_gendev_to_pci(dev), sg, nents, dir)
  24 #define dma_unmap_sg(dev, sg, nents, dir)               \
  25                 pci_unmap_sg(alpha_gendev_to_pci(dev), sg, nents, dir)
  26 #define dma_supported(dev, mask)                        \
  27                 pci_dma_supported(alpha_gendev_to_pci(dev), mask)
  28 #define dma_mapping_error(addr)                         \
  29                 pci_dma_mapping_error(addr)
  30
  31 #else   /* no PCI - no IOMMU. */
  32
  33 void *dma_alloc_coherent(struct device *dev, size_t size,
  34                          dma_addr_t *dma_handle, int gfp);
  35 int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
  36                enum dma_data_direction direction);
  37
  38 #define dma_free_coherent(dev, size, va, addr)          \
  39                 free_pages((unsigned long)va, get_order(size))
  40 #define dma_supported(dev, mask)                (mask < 0x00ffffffUL ? 0 : 1)
  41 #define dma_map_single(dev, va, size, dir)      virt_to_phys(va)
  42 #define dma_map_page(dev, page, off, size, dir) (page_to_pa(page) + off)
  43
  44 #define dma_unmap_single(dev, addr, size, dir)  do { } while (0)
  45 #define dma_unmap_page(dev, addr, size, dir)    do { } while (0)
  46 #define dma_unmap_sg(dev, sg, nents, dir)       do { } while (0)
  47
  48 #define dma_mapping_error(addr)  (0)
  49
  50 #endif  /* !CONFIG_PCI */
  51
  52 #define dma_alloc_noncoherent(d, s, h, f)       dma_alloc_coherent(d, s, h, f)
  53 #define dma_free_noncoherent(d, s, v, h)        dma_free_coherent(d, s, v, h)
  54 #define dma_is_consistent(dev)                  (1)
  55
  56 int dma_set_mask(struct device *dev, u64 mask);
  57
  58 #define dma_sync_single_for_cpu(dev, addr, size, dir)     do { } while (0)
  59 #define dma_sync_single_for_device(dev, addr, size, dir)  do { } while (0)
  60 #define dma_sync_single_range(dev, addr, off, size, dir)  do { } while (0)
  61 #define dma_sync_sg_for_cpu(dev, sg, nents, dir)          do { } while (0)
  62 #define dma_sync_sg_for_device(dev, sg, nents, dir)       do { } while (0)
  63 #define dma_cache_sync(va, size, dir)                     do { } while (0)
  64
  65 #define dma_get_cache_alignment()                         L1_CACHE_BYTES
  66
  67 #endif  /* _ALPHA_DMA_MAPPING_H */