Signed-off-by: David Woodhouse <david.woodho...@intel.com>
---
drivers/iommu/intel-iommu.c | 35 +++++++++++++++++------------------
1 file changed, 17 insertions(+), 18 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index ccef436..1ab7c18 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1240,13 +1240,13 @@ static void __iommu_flush_iotlb(struct intel_iommu
*iommu, u16 did,
(unsigned long long)DMA_TLB_IAIG(val));
}
-static struct device_domain_info *iommu_support_dev_iotlb(
- struct dmar_domain *domain, int segment, u8 bus, u8 devfn)
+static struct device_domain_info *
+iommu_support_dev_iotlb (struct dmar_domain *domain, struct intel_iommu *iommu,
+ u8 bus, u8 devfn)
{
int found = 0;
unsigned long flags;
struct device_domain_info *info;
- struct intel_iommu *iommu = device_to_iommu(segment, bus, devfn);
struct pci_dev *pdev;
if (!ecap_dev_iotlb_support(iommu->ecap))
@@ -1700,12 +1700,12 @@ static void domain_exit(struct dmar_domain *domain)
free_domain_mem(domain);
}
-static int domain_context_mapping_one(struct dmar_domain *domain, int segment,
- u8 bus, u8 devfn, int translation)
+static int domain_context_mapping_one(struct dmar_domain *domain,
+ struct intel_iommu *iommu,
+ u8 bus, u8 devfn, int translation)
{
struct context_entry *context;
unsigned long flags;
- struct intel_iommu *iommu;
struct dma_pte *pgd;
unsigned long num;
unsigned long ndomains;
@@ -1720,10 +1720,6 @@ static int domain_context_mapping_one(struct dmar_domain
*domain, int segment,
BUG_ON(translation != CONTEXT_TT_PASS_THROUGH &&
translation != CONTEXT_TT_MULTI_LEVEL);
- iommu = device_to_iommu(segment, bus, devfn);
- if (!iommu)
- return -ENODEV;
-
context = device_to_context_entry(iommu, bus, devfn);
if (!context)
return -ENOMEM;
@@ -1781,7 +1777,7 @@ static int domain_context_mapping_one(struct dmar_domain
*domain, int segment,
context_set_domain_id(context, id);
if (translation != CONTEXT_TT_PASS_THROUGH) {
- info = iommu_support_dev_iotlb(domain, segment, bus, devfn);
+ info = iommu_support_dev_iotlb(domain, iommu, bus, devfn);
translation = info ? CONTEXT_TT_DEV_IOTLB :
CONTEXT_TT_MULTI_LEVEL;
}
@@ -1836,8 +1832,14 @@ domain_context_mapping(struct dmar_domain *domain,
struct pci_dev *pdev,
{
int ret;
struct pci_dev *tmp, *parent;
+ struct intel_iommu *iommu;
+
+ iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number,
+ pdev->devfn);
+ if (!iommu)
+ return -ENODEV;
- ret = domain_context_mapping_one(domain, pci_domain_nr(pdev->bus),
+ ret = domain_context_mapping_one(domain, iommu,
pdev->bus->number, pdev->devfn,
translation);
if (ret)
@@ -1850,8 +1852,7 @@ domain_context_mapping(struct dmar_domain *domain, struct
pci_dev *pdev,
/* Secondary interface's bus number and devfn 0 */
parent = pdev->bus->self;
while (parent != tmp) {
- ret = domain_context_mapping_one(domain,
- pci_domain_nr(parent->bus),
+ ret = domain_context_mapping_one(domain, iommu,
parent->bus->number,
parent->devfn, translation);
if (ret)
@@ -1859,13 +1860,11 @@ domain_context_mapping(struct dmar_domain *domain,
struct pci_dev *pdev,
parent = parent->bus->self;
}
if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */
- return domain_context_mapping_one(domain,
- pci_domain_nr(tmp->subordinate),
+ return domain_context_mapping_one(domain, iommu,
tmp->subordinate->number, 0,
translation);
else /* this is a legacy PCI bridge */
- return domain_context_mapping_one(domain,
- pci_domain_nr(tmp->bus),
+ return domain_context_mapping_one(domain, iommu,
tmp->bus->number,
tmp->devfn,
translation);
--
1.8.5.3
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