summaryrefslogtreecommitdiffstats
path: root/drivers/iommu
diff options
context:
space:
mode:
authorDavid Woodhouse <David.Woodhouse@intel.com>2014-03-09 13:31:18 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2014-03-24 14:06:44 +0000
commit5a8f40e8c8801a9805bbe60d140ed2b0b3b91d18 (patch)
tree8f70047bbeeb2b8e356e3fadac52130df27079db /drivers/iommu
parente2f8c5f6d45b092b52adea9d71018ef11250b924 (diff)
downloadop-kernel-dev-5a8f40e8c8801a9805bbe60d140ed2b0b3b91d18.zip
op-kernel-dev-5a8f40e8c8801a9805bbe60d140ed2b0b3b91d18.tar.gz
iommu/vt-d: Always store iommu in device_domain_info
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel-iommu.c47
1 files changed, 31 insertions, 16 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 84f0d42..8303f25 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1274,8 +1274,6 @@ iommu_support_dev_iotlb (struct dmar_domain *domain, struct intel_iommu *iommu,
if (!dmar_find_matched_atsr_unit(pdev))
return NULL;
- info->iommu = iommu;
-
return info;
}
@@ -2134,7 +2132,7 @@ static struct dmar_domain *find_domain(struct device *dev)
return NULL;
}
-static inline struct dmar_domain *
+static inline struct device_domain_info *
dmar_search_domain_by_dev_info(int segment, int bus, int devfn)
{
struct device_domain_info *info;
@@ -2142,16 +2140,17 @@ dmar_search_domain_by_dev_info(int segment, int bus, int devfn)
list_for_each_entry(info, &device_domain_list, global)
if (info->segment == segment && info->bus == bus &&
info->devfn == devfn)
- return info->domain;
+ return info;
return NULL;
}
-static struct dmar_domain *dmar_insert_dev_info(int segment, int bus, int devfn,
+static struct dmar_domain *dmar_insert_dev_info(struct intel_iommu *iommu,
+ int segment, int bus, int devfn,
struct device *dev,
struct dmar_domain *domain)
{
- struct dmar_domain *found;
+ struct dmar_domain *found = NULL;
struct device_domain_info *info;
unsigned long flags;
@@ -2164,14 +2163,19 @@ static struct dmar_domain *dmar_insert_dev_info(int segment, int bus, int devfn,
info->devfn = devfn;
info->dev = dev;
info->domain = domain;
+ info->iommu = iommu;
if (!dev)
domain->flags |= DOMAIN_FLAG_P2P_MULTIPLE_DEVICES;
spin_lock_irqsave(&device_domain_lock, flags);
if (dev)
found = find_domain(dev);
- else
- found = dmar_search_domain_by_dev_info(segment, bus, devfn);
+ else {
+ struct device_domain_info *info2;
+ info2 = dmar_search_domain_by_dev_info(segment, bus, devfn);
+ if (info2)
+ found = info2->domain;
+ }
if (found) {
spin_unlock_irqrestore(&device_domain_lock, flags);
free_devinfo_mem(info);
@@ -2192,7 +2196,8 @@ static struct dmar_domain *dmar_insert_dev_info(int segment, int bus, int devfn,
static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw)
{
struct dmar_domain *domain, *free = NULL;
- struct intel_iommu *iommu;
+ struct intel_iommu *iommu = NULL;
+ struct device_domain_info *info;
struct dmar_drhd_unit *drhd;
struct pci_dev *dev_tmp;
unsigned long flags;
@@ -2215,10 +2220,13 @@ static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw)
devfn = dev_tmp->devfn;
}
spin_lock_irqsave(&device_domain_lock, flags);
- domain = dmar_search_domain_by_dev_info(segment, bus, devfn);
+ info = dmar_search_domain_by_dev_info(segment, bus, devfn);
+ if (info) {
+ iommu = info->iommu;
+ domain = info->domain;
+ }
spin_unlock_irqrestore(&device_domain_lock, flags);
- /* pcie-pci bridge already has a domain, uses it */
- if (domain)
+ if (info)
goto found_domain;
}
@@ -2244,14 +2252,15 @@ static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw)
/* register pcie-to-pci device */
if (dev_tmp) {
- domain = dmar_insert_dev_info(segment, bus, devfn, NULL, domain);
+ domain = dmar_insert_dev_info(iommu, segment, bus, devfn, NULL,
+ domain);
if (!domain)
goto error;
}
found_domain:
- domain = dmar_insert_dev_info(segment, pdev->bus->number, pdev->devfn,
- &pdev->dev, domain);
+ domain = dmar_insert_dev_info(iommu, segment, pdev->bus->number,
+ pdev->devfn, &pdev->dev, domain);
error:
if (free != domain)
domain_exit(free);
@@ -2453,9 +2462,15 @@ static int domain_add_dev_info(struct dmar_domain *domain,
int translation)
{
struct dmar_domain *ndomain;
+ struct intel_iommu *iommu;
int ret;
- ndomain = dmar_insert_dev_info(pci_domain_nr(pdev->bus),
+ iommu = device_to_iommu(pci_domain_nr(pdev->bus),
+ pdev->bus->number, pdev->devfn);
+ if (!iommu)
+ return -ENODEV;
+
+ ndomain = dmar_insert_dev_info(iommu, pci_domain_nr(pdev->bus),
pdev->bus->number, pdev->devfn,
&pdev->dev, domain);
if (ndomain != domain)
OpenPOWER on IntegriCloud