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-rw-r--r--drivers/iommu/intel-iommu.c78
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);