Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...

[safe/jmp/linux-2.6] / drivers / pci / intel-iommu.c

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 43d755a..8d61594 100644 (file)
--- 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;
@@ -3261,6 +3296,8 @@ int __init intel_iommu_init(void)
 
        register_iommu(&intel_iommu_ops);
 
+       bus_register_notifier(&pci_bus_type, &device_nb);
+
        return 0;
 }
 
@@ -3282,7 +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 */