x86 gart: rename iommu.h to gart.h
[linux-2.6.git] / arch / x86 / kernel / pci-swiotlb_64.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/gart.h>
9 #include <asm/swiotlb.h>
10 #include <asm/dma.h>
11
12 int swiotlb __read_mostly;
13 EXPORT_SYMBOL(swiotlb);
14
15 const struct dma_mapping_ops swiotlb_dma_ops = {
16         .mapping_error = swiotlb_dma_mapping_error,
17         .alloc_coherent = swiotlb_alloc_coherent,
18         .free_coherent = swiotlb_free_coherent,
19         .map_single = swiotlb_map_single,
20         .unmap_single = swiotlb_unmap_single,
21         .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
22         .sync_single_for_device = swiotlb_sync_single_for_device,
23         .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
24         .sync_single_range_for_device = swiotlb_sync_single_range_for_device,
25         .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
26         .sync_sg_for_device = swiotlb_sync_sg_for_device,
27         .map_sg = swiotlb_map_sg,
28         .unmap_sg = swiotlb_unmap_sg,
29         .dma_supported = NULL,
30 };
31
32 void __init pci_swiotlb_init(void)
33 {
34         /* don't initialize swiotlb if iommu=off (no_iommu=1) */
35         if (!iommu_detected && !no_iommu && end_pfn > MAX_DMA32_PFN)
36                swiotlb = 1;
37         if (swiotlb_force)
38                 swiotlb = 1;
39         if (swiotlb) {
40                 printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
41                 swiotlb_init();
42                 dma_ops = &swiotlb_dma_ops;
43         }
44 }