diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 301c68fab03..1fd8bb76570 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -1905,32 +1905,31 @@ get_valid_domain_for_dev(struct pci_dev *pdev) return domain; } -static dma_addr_t intel_map_single(struct device *hwdev, void *addr, - size_t size, int dir) +static dma_addr_t +intel_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, int dir) { struct pci_dev *pdev = to_pci_dev(hwdev); - int ret; struct dmar_domain *domain; - unsigned long start_addr; + unsigned long start_paddr; struct iova *iova; int prot = 0; + int ret; BUG_ON(dir == DMA_NONE); if (pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) - return virt_to_bus(addr); + return paddr; domain = get_valid_domain_for_dev(pdev); if (!domain) return 0; - addr = (void *)virt_to_phys(addr); - size = aligned_size((u64)addr, size); + size = aligned_size((u64)paddr, size); iova = __intel_alloc_iova(hwdev, domain, size); if (!iova) goto error; - start_addr = iova->pfn_lo << PAGE_SHIFT_4K; + start_paddr = iova->pfn_lo << PAGE_SHIFT_4K; /* * Check if DMAR supports zero-length reads on write only @@ -1942,33 +1941,33 @@ static dma_addr_t intel_map_single(struct device *hwdev, void *addr, if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) prot |= DMA_PTE_WRITE; /* - * addr - (addr + size) might be partial page, we should map the whole + * paddr - (paddr + size) might be partial page, we should map the whole * page. Note: if two part of one page are separately mapped, we - * might have two guest_addr mapping to the same host addr, but this + * might have two guest_addr mapping to the same host paddr, but this * is not a big problem */ - ret = domain_page_mapping(domain, start_addr, - ((u64)addr) & PAGE_MASK_4K, size, prot); + ret = domain_page_mapping(domain, start_paddr, + ((u64)paddr) & PAGE_MASK_4K, size, prot); if (ret) goto error; pr_debug("Device %s request: %lx@%llx mapping: %lx@%llx, dir %d\n", - pci_name(pdev), size, (u64)addr, - size, (u64)start_addr, dir); + pci_name(pdev), size, (u64)paddr, + size, (u64)start_paddr, dir); /* it's a non-present to present mapping */ ret = iommu_flush_iotlb_psi(domain->iommu, domain->id, - start_addr, size >> PAGE_SHIFT_4K, 1); + start_paddr, size >> PAGE_SHIFT_4K, 1); if (ret) iommu_flush_write_buffer(domain->iommu); - return (start_addr + ((u64)addr & (~PAGE_MASK_4K))); + return (start_paddr + ((u64)paddr & (~PAGE_MASK_4K))); error: if (iova) __free_iova(&domain->iovad, iova); printk(KERN_ERR"Device %s request: %lx@%llx dir %d --- failed\n", - pci_name(pdev), size, (u64)addr, dir); + pci_name(pdev), size, (u64)paddr, dir); return 0; } @@ -2082,7 +2081,7 @@ static void * intel_alloc_coherent(struct device *hwdev, size_t size, return NULL; memset(vaddr, 0, size); - *dma_handle = intel_map_single(hwdev, vaddr, size, DMA_BIDIRECTIONAL); + *dma_handle = intel_map_single(hwdev, virt_to_bus(vaddr), size, DMA_BIDIRECTIONAL); if (*dma_handle) return vaddr; free_pages((unsigned long)vaddr, order); |