projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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> | |
| 6 | #include <asm/dma-mapping.h> | |
| 7 | #include <asm/proto.h> | |
| 8 | #include <asm/swiotlb.h> | |
| 9 | #include <asm/dma.h> | |
| 10 | ||
| 11 | int swiotlb __read_mostly; | |
| 12 | EXPORT_SYMBOL(swiotlb); | |
| 13 | ||
| 14 | struct dma_mapping_ops swiotlb_dma_ops = { | |
| 15 | .mapping_error = swiotlb_dma_mapping_error, | |
| 16 | .alloc_coherent = swiotlb_alloc_coherent, | |
| 17 | .free_coherent = swiotlb_free_coherent, | |
| 18 | .map_single = swiotlb_map_single, | |
| 19 | .unmap_single = swiotlb_unmap_single, | |
| 20 | .sync_single_for_cpu = swiotlb_sync_single_for_cpu, | |
| 21 | .sync_single_for_device = swiotlb_sync_single_for_device, | |
| 22 | .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, | |
| 23 | .sync_single_range_for_device = swiotlb_sync_single_range_for_device, | |
| 24 | .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, | |
| 25 | .sync_sg_for_device = swiotlb_sync_sg_for_device, | |
| 26 | .map_sg = swiotlb_map_sg, | |
| 27 | .unmap_sg = swiotlb_unmap_sg, | |
| 28 | .dma_supported = NULL, | |
| 29 | }; | |
| 30 | ||
| 31 | void pci_swiotlb_init(void) | |
| 32 | { | |
| 33 | /* don't initialize swiotlb if iommu=off (no_iommu=1) */ | |
| 34 | if (!iommu_aperture && !no_iommu && | |
| 35 | (end_pfn > MAX_DMA32_PFN || force_iommu)) | |
| 36 | swiotlb = 1; | |
| 37 | if (swiotlb) { | |
| 38 | swiotlb_init(); | |
| 39 | printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n"); | |
| 40 | dma_ops = &swiotlb_dma_ops; | |
| 41 | } | |
| 42 | } |