diff options
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 55 |
1 files changed, 47 insertions, 8 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index b1e97e682500..8d6159426311 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -1611,7 +1611,7 @@ domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev, return ret; parent = parent->bus->self; } - if (tmp->is_pcie) /* this is a PCIE-to-PCI bridge */ + if (pci_is_pcie(tmp)) /* this is a PCIE-to-PCI bridge */ return domain_context_mapping_one(domain, pci_domain_nr(tmp->subordinate), tmp->subordinate->number, 0, @@ -1651,7 +1651,7 @@ static int domain_context_mapped(struct pci_dev *pdev) return ret; parent = parent->bus->self; } - if (tmp->is_pcie) + if (pci_is_pcie(tmp)) return device_context_mapped(iommu, tmp->subordinate->number, 0); else @@ -1821,7 +1821,7 @@ static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw) dev_tmp = pci_find_upstream_pcie_bridge(pdev); if (dev_tmp) { - if (dev_tmp->is_pcie) { + if (pci_is_pcie(dev_tmp)) { bus = dev_tmp->subordinate->number; devfn = 0; } else { @@ -2182,7 +2182,7 @@ static int iommu_should_identity_map(struct pci_dev *pdev, int startup) * the 1:1 domain, just in _case_ one of their siblings turns out * not to be able to map all of memory. */ - if (!pdev->is_pcie) { + if (!pci_is_pcie(pdev)) { if (!pci_is_root_bus(pdev->bus)) return 0; if (pdev->class >> 8 == PCI_CLASS_BRIDGE_PCI) @@ -2767,7 +2767,15 @@ static void *intel_alloc_coherent(struct device *hwdev, size_t size, size = PAGE_ALIGN(size); order = get_order(size); - flags &= ~(GFP_DMA | GFP_DMA32); + + if (!iommu_no_mapping(hwdev)) + flags &= ~(GFP_DMA | GFP_DMA32); + else if (hwdev->coherent_dma_mask < dma_get_required_mask(hwdev)) { + if (hwdev->coherent_dma_mask < DMA_BIT_MASK(32)) + flags |= GFP_DMA; + else + flags |= GFP_DMA32; + } vaddr = (void *)__get_free_pages(flags, order); if (!vaddr) @@ -3207,6 +3215,33 @@ static int __init init_iommu_sysfs(void) } #endif /* CONFIG_PM */ +/* + * Here we only respond to action of unbound device from driver. + * + * Added device is not attached to its DMAR domain here yet. That will happen + * when mapping the device to iova. + */ +static int device_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct device *dev = data; + struct pci_dev *pdev = to_pci_dev(dev); + struct dmar_domain *domain; + + domain = find_domain(pdev); + if (!domain) + return 0; + + if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through) + domain_remove_one_dev_info(domain, pdev); + + return 0; +} + +static struct notifier_block device_nb = { + .notifier_call = device_notifier, +}; + int __init intel_iommu_init(void) { int ret = 0; @@ -3231,7 +3266,7 @@ int __init intel_iommu_init(void) * Check the need for DMA-remapping initialization now. * Above initialization will also be used by Interrupt-remapping. */ - if (no_iommu || swiotlb || dmar_disabled) + if (no_iommu || dmar_disabled) return -ENODEV; iommu_init_mempool(); @@ -3252,13 +3287,17 @@ int __init intel_iommu_init(void) "PCI-DMA: Intel(R) Virtualization Technology for Directed I/O\n"); init_timer(&unmap_timer); - force_iommu = 1; +#ifdef CONFIG_SWIOTLB + swiotlb = 0; +#endif dma_ops = &intel_dma_ops; init_iommu_sysfs(); register_iommu(&intel_iommu_ops); + bus_register_notifier(&pci_bus_type, &device_nb); + return 0; } @@ -3280,7 +3319,7 @@ static void iommu_detach_dependent_devices(struct intel_iommu *iommu, parent->devfn); parent = parent->bus->self; } - if (tmp->is_pcie) /* this is a PCIE-to-PCI bridge */ + if (pci_is_pcie(tmp)) /* this is a PCIE-to-PCI bridge */ iommu_detach_dev(iommu, tmp->subordinate->number, 0); else /* this is a legacy PCI bridge */ |