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>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 28cb713..d2e6138 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -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;

diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 3a4b09a..8f87304 100644 (file)
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -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;

diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index fa364de..b7d1e2f 100644 (file)
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -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