1 /* Glue code to lib/swiotlb.c */
4 #include <linux/cache.h>
5 #include <linux/module.h>
6 #include <linux/dma-mapping.h>
8 #include <asm/swiotlb.h>
10 #include <asm/iommu.h>
11 #include <asm/machvec.h>
13 int swiotlb __read_mostly;
14 EXPORT_SYMBOL(swiotlb);
16 /* Set this to 1 if there is a HW IOMMU in the system */
17 int iommu_detected __read_mostly;
19 struct dma_map_ops swiotlb_dma_ops = {
20 .alloc_coherent = swiotlb_alloc_coherent,
21 .free_coherent = swiotlb_free_coherent,
22 .map_page = swiotlb_map_page,
23 .unmap_page = swiotlb_unmap_page,
24 .map_sg = swiotlb_map_sg_attrs,
25 .unmap_sg = swiotlb_unmap_sg_attrs,
26 .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
27 .sync_single_for_device = swiotlb_sync_single_for_device,
28 .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
29 .sync_single_range_for_device = swiotlb_sync_single_range_for_device,
30 .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
31 .sync_sg_for_device = swiotlb_sync_sg_for_device,
32 .dma_supported = swiotlb_dma_supported,
33 .mapping_error = swiotlb_dma_mapping_error,
36 void swiotlb_dma_init(void)
38 dma_ops = &swiotlb_dma_ops;
42 void __init pci_swiotlb_init(void)
44 if (!iommu_detected) {
45 #ifdef CONFIG_IA64_GENERIC
47 printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
50 dma_ops = &swiotlb_dma_ops;
52 panic("Unable to find Intel IOMMU");