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iommu/vt-d: Always store iommu in device_domain_info 

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse 2014-03-09 13:31:18 -07:00
parent e2f8c5f6d4
commit 5a8f40e8c8
1 changed files with 31 additions and 16 deletions
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47
drivers/iommu/intel-iommu.c
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@ -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)