projects / linux-2.6-block.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> | |
| 8ce79960 JF |
6 | #include <linux/swiotlb.h> |
| 7 | #include <linux/bootmem.h> | |
| d6bd3a39 REB |
8 | #include <linux/dma-mapping.h> |
| 9 | ||
| 46a7fa27 | 10 | #include <asm/iommu.h> |
| 17a941d8 MBY |
11 | #include <asm/swiotlb.h> |
| 12 | #include <asm/dma.h> | |
| 13 | ||
| 14 | int swiotlb __read_mostly; | |
| 17a941d8 | 15 | |
| 03967c52 FT |
16 | static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size, |
| 17 | dma_addr_t *dma_handle, gfp_t flags) | |
| 18 | { | |
| 19 | void *vaddr; | |
| 20 | ||
| 21 | vaddr = dma_generic_alloc_coherent(hwdev, size, dma_handle, flags); | |
| 22 | if (vaddr) | |
| 23 | return vaddr; | |
| 24 | ||
| 25 | return swiotlb_alloc_coherent(hwdev, size, dma_handle, flags); | |
| 26 | } | |
| 27 | ||
| ff6c6fed | 28 | static struct dma_map_ops swiotlb_dma_ops = { |
| 17a941d8 | 29 | .mapping_error = swiotlb_dma_mapping_error, |
| 03967c52 | 30 | .alloc_coherent = x86_swiotlb_alloc_coherent, |
| 17a941d8 | 31 | .free_coherent = swiotlb_free_coherent, |
| 17a941d8 MBY |
32 | .sync_single_for_cpu = swiotlb_sync_single_for_cpu, |
| 33 | .sync_single_for_device = swiotlb_sync_single_for_device, | |
| 34 | .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, | |
| 35 | .sync_single_range_for_device = swiotlb_sync_single_range_for_device, | |
| 36 | .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, | |
| 37 | .sync_sg_for_device = swiotlb_sync_sg_for_device, | |
| 160c1d8e FT |
38 | .map_sg = swiotlb_map_sg_attrs, |
| 39 | .unmap_sg = swiotlb_unmap_sg_attrs, | |
| 4cf37bb7 FT |
40 | .map_page = swiotlb_map_page, |
| 41 | .unmap_page = swiotlb_unmap_page, | |
| 17a941d8 MBY |
42 | .dma_supported = NULL, |
| 43 | }; | |
| 44 | ||
| 563aaf06 | 45 | void __init pci_swiotlb_init(void) |
| 17a941d8 MBY |
46 | { |
| 47 | /* don't initialize swiotlb if iommu=off (no_iommu=1) */ | |
| cfb80c9e | 48 | #ifdef CONFIG_X86_64 |
| 19943b0e DW |
49 | if ((!iommu_detected && !no_iommu && max_pfn > MAX_DMA32_PFN)) |
| 50 | swiotlb = 1; | |
| cfb80c9e | 51 | #endif |
| 65f87d8a AK |
52 | if (swiotlb_force) |
| 53 | swiotlb = 1; | |
| 17a941d8 | 54 | if (swiotlb) { |
| ad32e8cb | 55 | swiotlb_init(0); |
| 17a941d8 MBY |
56 | dma_ops = &swiotlb_dma_ops; |
| 57 | } | |
| 58 | } |