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Commit | Line | Data |
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17a941d8 MBY |
1 | /* Glue code to lib/swiotlb.c */ |
2 | ||
3 | #include <linux/pci.h> | |
4 | #include <linux/cache.h> | |
5 | #include <linux/module.h> | |
d6bd3a39 REB |
6 | #include <linux/dma-mapping.h> |
7 | ||
395624fc | 8 | #include <asm/gart.h> |
17a941d8 MBY |
9 | #include <asm/swiotlb.h> |
10 | #include <asm/dma.h> | |
11 | ||
12 | int swiotlb __read_mostly; | |
13 | EXPORT_SYMBOL(swiotlb); | |
14 | ||
e6584504 | 15 | const struct dma_mapping_ops swiotlb_dma_ops = { |
17a941d8 MBY |
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 | ||
563aaf06 | 32 | void __init pci_swiotlb_init(void) |
17a941d8 MBY |
33 | { |
34 | /* don't initialize swiotlb if iommu=off (no_iommu=1) */ | |
65f87d8a | 35 | if (!iommu_detected && !no_iommu && end_pfn > MAX_DMA32_PFN) |
17a941d8 | 36 | swiotlb = 1; |
65f87d8a AK |
37 | if (swiotlb_force) |
38 | swiotlb = 1; | |
17a941d8 | 39 | if (swiotlb) { |
17a941d8 | 40 | printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n"); |
5b7b644c | 41 | swiotlb_init(); |
17a941d8 MBY |
42 | dma_ops = &swiotlb_dma_ops; |
43 | } | |
44 | } |