4 files changed, 17 insertions, 42 deletions

diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index 6d12033649f8..7e4715f92773 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -349,7 +349,9 @@ static void idxd_cdev_evl_drain_pasid(struct idxd_wq *wq, u32 pasid)
 			set_bit(h, evl->bmap);
 		h = (h + 1) % size;
 	}
-	drain_workqueue(wq->wq);
+	if (wq->wq)
+		drain_workqueue(wq->wq);
+
 	mutex_unlock(&evl->lock);
 }
 
@@ -442,10 +444,12 @@ static int idxd_submit_user_descriptor(struct idxd_user_context *ctx,
 	 * DSA devices are capable of indirect ("batch") command submission.
 	 * On devices where direct user submissions are not safe, we cannot
 	 * allow this since there is no good way for us to verify these
-	 * indirect commands.
+	 * indirect commands. Narrow the restriction of operations with the
+	 * BATCH opcode to only DSA version 1 devices.
 	 */
 	if (is_dsa_dev(idxd_dev) && descriptor.opcode == DSA_OPCODE_BATCH &&
-		!wq->idxd->user_submission_safe)
+	    wq->idxd->hw.version == DEVICE_VERSION_1 &&
+	    !wq->idxd->user_submission_safe)
 		return -EINVAL;
 	/*
 	 * As per the programming specification, the completion address must be
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 214b8039439f..74e6695881e6 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -19,7 +19,6 @@
 
 #define IDXD_DRIVER_VERSION	"1.00"
 
-extern struct kmem_cache *idxd_desc_pool;
 extern bool tc_override;
 
 struct idxd_wq;
@@ -171,7 +170,6 @@ struct idxd_cdev {
 
 #define DRIVER_NAME_SIZE		128
 
-#define IDXD_ALLOCATED_BATCH_SIZE	128U
 #define WQ_NAME_SIZE   1024
 #define WQ_TYPE_SIZE   10
 
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 760b7d81fcd8..80355d03004d 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -702,27 +702,6 @@ static void idxd_disable_system_pasid(struct idxd_device *idxd)
 	idxd->pasid = IOMMU_PASID_INVALID;
 }
 
-static int idxd_enable_sva(struct pci_dev *pdev)
-{
-	int ret;
-
-	ret = iommu_dev_enable_feature(&pdev->dev, IOMMU_DEV_FEAT_IOPF);
-	if (ret)
-		return ret;
-
-	ret = iommu_dev_enable_feature(&pdev->dev, IOMMU_DEV_FEAT_SVA);
-	if (ret)
-		iommu_dev_disable_feature(&pdev->dev, IOMMU_DEV_FEAT_IOPF);
-
-	return ret;
-}
-
-static void idxd_disable_sva(struct pci_dev *pdev)
-{
-	iommu_dev_disable_feature(&pdev->dev, IOMMU_DEV_FEAT_SVA);
-	iommu_dev_disable_feature(&pdev->dev, IOMMU_DEV_FEAT_IOPF);
-}
-
 static int idxd_probe(struct idxd_device *idxd)
 {
 	struct pci_dev *pdev = idxd->pdev;
@@ -737,17 +716,13 @@ static int idxd_probe(struct idxd_device *idxd)
 	dev_dbg(dev, "IDXD reset complete\n");
 
 	if (IS_ENABLED(CONFIG_INTEL_IDXD_SVM) && sva) {
-		if (idxd_enable_sva(pdev)) {
-			dev_warn(dev, "Unable to turn on user SVA feature.\n");
-		} else {
-			set_bit(IDXD_FLAG_USER_PASID_ENABLED, &idxd->flags);
+		set_bit(IDXD_FLAG_USER_PASID_ENABLED, &idxd->flags);
 
-			rc = idxd_enable_system_pasid(idxd);
-			if (rc)
-				dev_warn(dev, "No in-kernel DMA with PASID. %d\n", rc);
-			else
-				set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
-		}
+		rc = idxd_enable_system_pasid(idxd);
+		if (rc)
+			dev_warn(dev, "No in-kernel DMA with PASID. %d\n", rc);
+		else
+			set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
 	} else if (!sva) {
 		dev_warn(dev, "User forced SVA off via module param.\n");
 	}
@@ -785,8 +760,6 @@ static int idxd_probe(struct idxd_device *idxd)
  err:
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
-	if (device_user_pasid_enabled(idxd))
-		idxd_disable_sva(pdev);
 	return rc;
 }
 
@@ -797,8 +770,6 @@ static void idxd_cleanup(struct idxd_device *idxd)
 	idxd_cleanup_internals(idxd);
 	if (device_pasid_enabled(idxd))
 		idxd_disable_system_pasid(idxd);
-	if (device_user_pasid_enabled(idxd))
-		idxd_disable_sva(idxd->pdev);
 }
 
 /*
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 6af493f6ba77..9f0701021af0 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1208,9 +1208,11 @@ static ssize_t op_cap_show_common(struct device *dev, char *buf, unsigned long *
 
 		/* On systems where direct user submissions are not safe, we need to clear out
 		 * the BATCH capability from the capability mask in sysfs since we cannot support
-		 * that command on such systems.
+		 * that command on such systems. Narrow the restriction of operations with the
+		 * BATCH opcode to only DSA version 1 devices.
 		 */
-		if (i == DSA_OPCODE_BATCH/64 && !confdev_to_idxd(dev)->user_submission_safe)
+		if (i == DSA_OPCODE_BATCH/64 && !confdev_to_idxd(dev)->user_submission_safe &&
+		    confdev_to_idxd(dev)->hw.version == DEVICE_VERSION_1)
 			clear_bit(DSA_OPCODE_BATCH % 64, &val);
 
 		pos += sysfs_emit_at(buf, pos, "%*pb", 64, &val);