arch/ia64/kernel/pci-swiotlb.c

   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 /* Set this to 1 if there is a HW IOMMU in the system */
  17 int iommu_detected __read_mostly;
  18
  19 struct dma_mapping_ops swiotlb_dma_ops = {
  20         .alloc_coherent = swiotlb_alloc_coherent,
  21         .free_coherent = swiotlb_free_coherent,
  22         .map_single = swiotlb_map_single,
  23         .unmap_single = swiotlb_unmap_single,
  24         .map_single_attrs = swiotlb_map_single_attrs,
  25         .unmap_single_attrs = swiotlb_unmap_single_attrs,
  26         .map_sg_attrs = swiotlb_map_sg_attrs,
  27         .unmap_sg_attrs = swiotlb_unmap_sg_attrs,
  28         .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
  29         .sync_single_for_device = swiotlb_sync_single_for_device,
  30         .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
  31         .sync_single_range_for_device = swiotlb_sync_single_range_for_device,
  32         .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
  33         .sync_sg_for_device = swiotlb_sync_sg_for_device,
  34         .map_sg = swiotlb_map_sg,
  35         .unmap_sg = swiotlb_unmap_sg,
  36         .dma_supported_op = swiotlb_dma_supported,
  37         .mapping_error = swiotlb_dma_mapping_error,
  38 };
  39
  40 void __init pci_swiotlb_init(void)
  41 {
  42         if (!iommu_detected) {
  43 #ifdef CONFIG_IA64_GENERIC
  44                 swiotlb = 1;
  45                 printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
  46                 machvec_init("dig");
  47                 swiotlb_init();
  48                 dma_ops = &swiotlb_dma_ops;
  49 #else
  50                 panic("Unable to find Intel IOMMU");
  51 #endif
  52         }
  53 }