diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 78 |
1 files changed, 46 insertions, 32 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 1030230d4851..cfc5eef81b82 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -664,37 +664,53 @@ static void domain_update_iommu_cap(struct dmar_domain *domain) domain_update_iommu_superpage(domain); } -static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) +static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn) { struct dmar_drhd_unit *drhd = NULL; struct intel_iommu *iommu; - struct device *dev; - struct pci_dev *pdev; + struct device *tmp; + struct pci_dev *ptmp, *pdev = NULL; + u16 segment; int i; + if (dev_is_pci(dev)) { + pdev = to_pci_dev(dev); + segment = pci_domain_nr(pdev->bus); + } else if (ACPI_COMPANION(dev)) + dev = &ACPI_COMPANION(dev)->dev; + rcu_read_lock(); for_each_active_iommu(iommu, drhd) { - if (segment != drhd->segment) + if (pdev && segment != drhd->segment) continue; for_each_active_dev_scope(drhd->devices, - drhd->devices_cnt, i, dev) { - if (!dev_is_pci(dev)) - continue; - pdev = to_pci_dev(dev); - if (pdev->bus->number == bus && pdev->devfn == devfn) - goto out; - if (pdev->subordinate && - pdev->subordinate->number <= bus && - pdev->subordinate->busn_res.end >= bus) + drhd->devices_cnt, i, tmp) { + if (tmp == dev) { + *bus = drhd->devices[i].bus; + *devfn = drhd->devices[i].devfn; goto out; + } + + if (!pdev || !dev_is_pci(tmp)) + continue; + + ptmp = to_pci_dev(tmp); + if (ptmp->subordinate && + ptmp->subordinate->number <= pdev->bus->number && + ptmp->subordinate->busn_res.end >= pdev->bus->number) + goto got_pdev; } - if (drhd->include_all) + if (pdev && drhd->include_all) { + got_pdev: + *bus = pdev->bus->number; + *devfn = pdev->devfn; goto out; + } } iommu = NULL; -out: + out: rcu_read_unlock(); return iommu; @@ -1830,14 +1846,13 @@ domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev, int ret; struct pci_dev *tmp, *parent; struct intel_iommu *iommu; + u8 bus, devfn; - iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, - pdev->devfn); + iommu = device_to_iommu(&pdev->dev, &bus, &devfn); if (!iommu) return -ENODEV; - ret = domain_context_mapping_one(domain, iommu, - pdev->bus->number, pdev->devfn, + ret = domain_context_mapping_one(domain, iommu, bus, devfn, translation); if (ret) return ret; @@ -1872,13 +1887,13 @@ static int domain_context_mapped(struct pci_dev *pdev) int ret; struct pci_dev *tmp, *parent; struct intel_iommu *iommu; + u8 bus, devfn; - iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, - pdev->devfn); + iommu = device_to_iommu(&pdev->dev, &bus, &devfn); if (!iommu) return -ENODEV; - ret = device_context_mapped(iommu, pdev->bus->number, pdev->devfn); + ret = device_context_mapped(iommu, bus, devfn); if (!ret) return ret; /* dependent device mapping */ @@ -2459,15 +2474,14 @@ static int domain_add_dev_info(struct dmar_domain *domain, { struct dmar_domain *ndomain; struct intel_iommu *iommu; + u8 bus, devfn; int ret; - iommu = device_to_iommu(pci_domain_nr(pdev->bus), - pdev->bus->number, pdev->devfn); + iommu = device_to_iommu(&pdev->dev, &bus, &devfn); if (!iommu) return -ENODEV; - ndomain = dmar_insert_dev_info(iommu, pdev->bus->number, pdev->devfn, - &pdev->dev, domain); + ndomain = dmar_insert_dev_info(iommu, bus, devfn, &pdev->dev, domain); if (ndomain != domain) return -EBUSY; @@ -4020,9 +4034,9 @@ static void domain_remove_one_dev_info(struct dmar_domain *domain, struct intel_iommu *iommu; unsigned long flags; int found = 0; + u8 bus, devfn; - iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, - pdev->devfn); + iommu = device_to_iommu(&pdev->dev, &bus, &devfn); if (!iommu) return; @@ -4142,6 +4156,7 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, struct pci_dev *pdev = to_pci_dev(dev); struct intel_iommu *iommu; int addr_width; + u8 bus, devfn; /* normally pdev is not mapped */ if (unlikely(domain_context_mapped(pdev))) { @@ -4157,8 +4172,7 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, } } - iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, - pdev->devfn); + iommu = device_to_iommu(dev, &bus, &devfn); if (!iommu) return -ENODEV; @@ -4324,9 +4338,9 @@ static int intel_iommu_add_device(struct device *dev) struct pci_dev *bridge, *dma_pdev = NULL; struct iommu_group *group; int ret; + u8 bus, devfn; - if (!device_to_iommu(pci_domain_nr(pdev->bus), - pdev->bus->number, pdev->devfn)) + if (!device_to_iommu(dev, &bus, &devfn)) return -ENODEV; bridge = pci_find_upstream_pcie_bridge(pdev); |