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   1 /* Glue code to lib/swiotlb.c */
   2
   3 #include <linux/pci.h>
   4 #include <linux/cache.h>
   5 #include <linux/module.h>
   6 #include <linux/dma-mapping.h>
   7
   8 #include <asm/swiotlb.h>
   9 #include <asm/dma.h>
  10 #include <asm/iommu.h>
  11 #include <asm/machvec.h>
  12
  13 int swiotlb __read_mostly;
  14 EXPORT_SYMBOL(swiotlb);
  15
  16 struct dma_map_ops swiotlb_dma_ops = {
  17         .alloc_coherent = swiotlb_alloc_coherent,
  18         .free_coherent = swiotlb_free_coherent,
  19         .map_page = swiotlb_map_page,
  20         .unmap_page = swiotlb_unmap_page,
  21         .map_sg = swiotlb_map_sg_attrs,
  22         .unmap_sg = swiotlb_unmap_sg_attrs,
  23         .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
  24         .sync_single_for_device = swiotlb_sync_single_for_device,
  25         .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
  26         .sync_single_range_for_device = swiotlb_sync_single_range_for_device,
  27         .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
  28         .sync_sg_for_device = swiotlb_sync_sg_for_device,
  29         .dma_supported = swiotlb_dma_supported,
  30         .mapping_error = swiotlb_dma_mapping_error,
  31 };
  32
  33 void __init swiotlb_dma_init(void)
  34 {
  35         dma_ops = &swiotlb_dma_ops;
  36         swiotlb_init();
  37 }
  38
  39 void __init pci_swiotlb_init(void)
  40 {
  41         if (!iommu_detected) {
  42 #ifdef CONFIG_IA64_GENERIC
  43                 swiotlb = 1;
  44                 printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
  45                 machvec_init("dig");
  46                 swiotlb_init();
  47                 dma_ops = &swiotlb_dma_ops;
  48 #else
  49                 panic("Unable to find Intel IOMMU");
  50 #endif
  51         }
  52 }