| /* Glue code to lib/swiotlb.c */ |
| |
| #include <linux/pci.h> |
| #include <linux/cache.h> |
| #include <linux/module.h> |
| #include <linux/dma-mapping.h> |
| |
| #include <asm/proto.h> |
| #include <asm/swiotlb.h> |
| #include <asm/dma.h> |
| |
| int swiotlb __read_mostly; |
| EXPORT_SYMBOL(swiotlb); |
| |
| const struct dma_mapping_ops swiotlb_dma_ops = { |
| .mapping_error = swiotlb_dma_mapping_error, |
| .alloc_coherent = swiotlb_alloc_coherent, |
| .free_coherent = swiotlb_free_coherent, |
| .map_single = swiotlb_map_single, |
| .unmap_single = swiotlb_unmap_single, |
| .sync_single_for_cpu = swiotlb_sync_single_for_cpu, |
| .sync_single_for_device = swiotlb_sync_single_for_device, |
| .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, |
| .sync_single_range_for_device = swiotlb_sync_single_range_for_device, |
| .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, |
| .sync_sg_for_device = swiotlb_sync_sg_for_device, |
| .map_sg = swiotlb_map_sg, |
| .unmap_sg = swiotlb_unmap_sg, |
| .dma_supported = NULL, |
| }; |
| |
| void __init pci_swiotlb_init(void) |
| { |
| /* don't initialize swiotlb if iommu=off (no_iommu=1) */ |
| if (!iommu_detected && !no_iommu && end_pfn > MAX_DMA32_PFN) |
| swiotlb = 1; |
| if (swiotlb_force) |
| swiotlb = 1; |
| if (swiotlb) { |
| printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n"); |
| swiotlb_init(); |
| dma_ops = &swiotlb_dma_ops; |
| } |
| } |