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 | ||
46a7fa27 | 8 | #include <asm/iommu.h> |
17a941d8 MBY |
9 | #include <asm/swiotlb.h> |
10 | #include <asm/dma.h> | |
11 | ||
12 | int swiotlb __read_mostly; | |
17a941d8 | 13 | |
2be62149 IM |
14 | static dma_addr_t |
15 | swiotlb_map_single_phys(struct device *hwdev, phys_addr_t paddr, size_t size, | |
16 | int direction) | |
17 | { | |
18 | return swiotlb_map_single(hwdev, phys_to_virt(paddr), size, direction); | |
19 | } | |
20 | ||
8d8bb39b | 21 | struct dma_mapping_ops swiotlb_dma_ops = { |
17a941d8 MBY |
22 | .mapping_error = swiotlb_dma_mapping_error, |
23 | .alloc_coherent = swiotlb_alloc_coherent, | |
24 | .free_coherent = swiotlb_free_coherent, | |
2be62149 | 25 | .map_single = swiotlb_map_single_phys, |
17a941d8 MBY |
26 | .unmap_single = swiotlb_unmap_single, |
27 | .sync_single_for_cpu = swiotlb_sync_single_for_cpu, | |
28 | .sync_single_for_device = swiotlb_sync_single_for_device, | |
29 | .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, | |
30 | .sync_single_range_for_device = swiotlb_sync_single_range_for_device, | |
31 | .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, | |
32 | .sync_sg_for_device = swiotlb_sync_sg_for_device, | |
33 | .map_sg = swiotlb_map_sg, | |
34 | .unmap_sg = swiotlb_unmap_sg, | |
35 | .dma_supported = NULL, | |
36 | }; | |
37 | ||
563aaf06 | 38 | void __init pci_swiotlb_init(void) |
17a941d8 MBY |
39 | { |
40 | /* don't initialize swiotlb if iommu=off (no_iommu=1) */ | |
c987d12f | 41 | if (!iommu_detected && !no_iommu && max_pfn > MAX_DMA32_PFN) |
17a941d8 | 42 | swiotlb = 1; |
65f87d8a AK |
43 | if (swiotlb_force) |
44 | swiotlb = 1; | |
17a941d8 | 45 | if (swiotlb) { |
17a941d8 | 46 | printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n"); |
5b7b644c | 47 | swiotlb_init(); |
17a941d8 MBY |
48 | dma_ops = &swiotlb_dma_ops; |
49 | } | |
50 | } |