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iommu/vt-d: Make intel_iommu_enable_pasid() more generic 

This moves intel_iommu_enable_pasid() out of the scope of
CONFIG_INTEL_IOMMU_SVM with more and more features requiring
pasid function.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2019-03-25 09:30:29 +08:00 committed by Joerg Roedel
parent 2b899390fd
commit d7cbc0f322
3 changed files with 26 additions and 16 deletions
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21
drivers/iommu/intel-iommu.c
View File

@ -5307,8 +5307,7 @@ static void intel_iommu_put_resv_regions(struct device *dev,
}
}
#ifdef CONFIG_INTEL_IOMMU_SVM
int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev)
int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev)
{
struct device_domain_info *info;
struct context_entry *context;
@ -5317,7 +5316,7 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sd
u64 ctx_lo;
int ret;
domain = get_valid_domain_for_dev(sdev->dev);
domain = get_valid_domain_for_dev(dev);
if (!domain)
return -EINVAL;
@ -5325,7 +5324,7 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sd
spin_lock(&iommu->lock);
ret = -EINVAL;
info = sdev->dev->archdata.iommu;
info = dev->archdata.iommu;
if (!info || !info->pasid_supported)
goto out;
@ -5335,14 +5334,13 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sd
ctx_lo = context[0].lo;
sdev->did = FLPT_DEFAULT_DID;
sdev->sid = PCI_DEVID(info->bus, info->devfn);
if (!(ctx_lo & CONTEXT_PASIDE)) {
ctx_lo |= CONTEXT_PASIDE;
context[0].lo = ctx_lo;
wmb();
iommu->flush.flush_context(iommu, sdev->did, sdev->sid,
iommu->flush.flush_context(iommu,
domain->iommu_did[iommu->seq_id],
PCI_DEVID(info->bus, info->devfn),
DMA_CCMD_MASK_NOBIT,
DMA_CCMD_DEVICE_INVL);
}
@ -5351,12 +5349,6 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sd
if (!info->pasid_enabled)
iommu_enable_dev_iotlb(info);
if (info->ats_enabled) {
sdev->dev_iotlb = 1;
sdev->qdep = info->ats_qdep;
if (sdev->qdep >= QI_DEV_EIOTLB_MAX_INVS)
sdev->qdep = 0;
}
ret = 0;
out:
@ -5366,6 +5358,7 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sd
return ret;
}
#ifdef CONFIG_INTEL_IOMMU_SVM
struct intel_iommu *intel_svm_device_to_iommu(struct device *dev)
{
struct intel_iommu *iommu;

19
drivers/iommu/intel-svm.c
View File

@ -228,6 +228,7 @@ static LIST_HEAD(global_svm_list);
int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ops *ops)
{
struct intel_iommu *iommu = intel_svm_device_to_iommu(dev);
struct device_domain_info *info;
struct intel_svm_dev *sdev;
struct intel_svm *svm = NULL;
struct mm_struct *mm = NULL;
@ -291,13 +292,29 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
}
sdev->dev = dev;
ret = intel_iommu_enable_pasid(iommu, sdev);
ret = intel_iommu_enable_pasid(iommu, dev);
if (ret || !pasid) {
/* If they don't actually want to assign a PASID, this is
* just an enabling check/preparation. */
kfree(sdev);
goto out;
}
info = dev->archdata.iommu;
if (!info || !info->pasid_supported) {
kfree(sdev);
goto out;
}
sdev->did = FLPT_DEFAULT_DID;
sdev->sid = PCI_DEVID(info->bus, info->devfn);
if (info->ats_enabled) {
sdev->dev_iotlb = 1;
sdev->qdep = info->ats_qdep;
if (sdev->qdep >= QI_DEV_EIOTLB_MAX_INVS)
sdev->qdep = 0;
}
/* Finish the setup now we know we're keeping it */
sdev->users = 1;
sdev->ops = ops;

2
include/linux/intel-iommu.h
View File

@ -650,6 +650,7 @@ struct intel_iommu *domain_get_iommu(struct dmar_domain *domain);
int for_each_device_domain(int (*fn)(struct device_domain_info *info,
void *data), void *data);
void iommu_flush_write_buffer(struct intel_iommu *iommu);
int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev);
#ifdef CONFIG_INTEL_IOMMU_SVM
int intel_svm_init(struct intel_iommu *iommu);
@ -679,7 +680,6 @@ struct intel_svm {
struct list_head list;
};
extern int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev);
extern struct intel_iommu *intel_svm_device_to_iommu(struct device *dev);
#endif