1 files changed, 158 insertions, 59 deletions

diff --git a/drivers/crypto/intel/qat/qat_common/adf_sriov.c b/drivers/crypto/intel/qat/qat_common/adf_sriov.c
index f44025bb6f99..bb904ba4bf84 100644
--- a/drivers/crypto/intel/qat/qat_common/adf_sriov.c
+++ b/drivers/crypto/intel/qat/qat_common/adf_sriov.c
@@ -26,10 +26,12 @@ static void adf_iov_send_resp(struct work_struct *work)
 	u32 vf_nr = vf_info->vf_nr;
 	bool ret;
 
+	mutex_lock(&vf_info->pfvf_mig_lock);
 	ret = adf_recv_and_handle_vf2pf_msg(accel_dev, vf_nr);
 	if (ret)
 		/* re-enable interrupt on PF from this VF */
 		adf_enable_vf2pf_interrupts(accel_dev, 1 << vf_nr);
+	mutex_unlock(&vf_info->pfvf_mig_lock);
 
 	kfree(pf2vf_resp);
 }
@@ -60,9 +62,9 @@ static int adf_enable_sriov(struct adf_accel_dev *accel_dev)
 		/* This ptr will be populated when VFs will be created */
 		vf_info->accel_dev = accel_dev;
 		vf_info->vf_nr = i;
-		vf_info->vf_compat_ver = 0;
 
 		mutex_init(&vf_info->pf2vf_lock);
+		mutex_init(&vf_info->pfvf_mig_lock);
 		ratelimit_state_init(&vf_info->vf2pf_ratelimit,
 				     ADF_VF2PF_RATELIMIT_INTERVAL,
 				     ADF_VF2PF_RATELIMIT_BURST);
@@ -84,6 +86,147 @@ static int adf_enable_sriov(struct adf_accel_dev *accel_dev)
 	return pci_enable_sriov(pdev, totalvfs);
 }
 
+static int adf_add_sriov_configuration(struct adf_accel_dev *accel_dev)
+{
+	unsigned long val = 0;
+	int ret;
+
+	ret = adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC);
+	if (ret)
+		return ret;
+
+	ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC, ADF_NUM_CY,
+					  &val, ADF_DEC);
+	if (ret)
+		return ret;
+
+	ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC, ADF_NUM_DC,
+					  &val, ADF_DEC);
+	if (ret)
+		return ret;
+
+	set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
+
+	return ret;
+}
+
+static int adf_do_disable_sriov(struct adf_accel_dev *accel_dev)
+{
+	int ret;
+
+	if (adf_dev_in_use(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev),
+			"Cannot disable SR-IOV, device in use\n");
+		return -EBUSY;
+	}
+
+	if (adf_dev_started(accel_dev)) {
+		if (adf_devmgr_in_reset(accel_dev)) {
+			dev_err(&GET_DEV(accel_dev),
+				"Cannot disable SR-IOV, device in reset\n");
+			return -EBUSY;
+		}
+
+		ret = adf_dev_down(accel_dev);
+		if (ret)
+			goto err_del_cfg;
+	}
+
+	adf_disable_sriov(accel_dev);
+
+	ret = adf_dev_up(accel_dev, true);
+	if (ret)
+		goto err_del_cfg;
+
+	return 0;
+
+err_del_cfg:
+	adf_cfg_del_all_except(accel_dev, ADF_GENERAL_SEC);
+	return ret;
+}
+
+static int adf_do_enable_sriov(struct adf_accel_dev *accel_dev)
+{
+	struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
+	int totalvfs = pci_sriov_get_totalvfs(pdev);
+	unsigned long val;
+	int ret;
+
+	if (!device_iommu_mapped(&GET_DEV(accel_dev))) {
+		dev_warn(&GET_DEV(accel_dev),
+			 "IOMMU should be enabled for SR-IOV to work correctly\n");
+	}
+
+	if (adf_dev_started(accel_dev)) {
+		if (adf_devmgr_in_reset(accel_dev) || adf_dev_in_use(accel_dev)) {
+			dev_err(&GET_DEV(accel_dev), "Device busy\n");
+			return -EBUSY;
+		}
+
+		ret = adf_dev_down(accel_dev);
+		if (ret)
+			return ret;
+	}
+
+	ret = adf_add_sriov_configuration(accel_dev);
+	if (ret)
+		goto err_del_cfg;
+
+	/* Allocate memory for VF info structs */
+	accel_dev->pf.vf_info = kcalloc(totalvfs, sizeof(struct adf_accel_vf_info),
+					GFP_KERNEL);
+	ret = -ENOMEM;
+	if (!accel_dev->pf.vf_info)
+		goto err_del_cfg;
+
+	ret = adf_dev_up(accel_dev, false);
+	if (ret) {
+		dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
+			accel_dev->accel_id);
+		goto err_free_vf_info;
+	}
+
+	ret = adf_enable_sriov(accel_dev);
+	if (ret)
+		goto err_free_vf_info;
+
+	val = 1;
+	ret = adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC, ADF_SRIOV_ENABLED,
+					  &val, ADF_DEC);
+	if (ret)
+		goto err_free_vf_info;
+
+	return totalvfs;
+
+err_free_vf_info:
+	adf_dev_down(accel_dev);
+	kfree(accel_dev->pf.vf_info);
+	accel_dev->pf.vf_info = NULL;
+	return ret;
+err_del_cfg:
+	adf_cfg_del_all_except(accel_dev, ADF_GENERAL_SEC);
+	return ret;
+}
+
+void adf_reenable_sriov(struct adf_accel_dev *accel_dev)
+{
+	struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
+	char cfg[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
+
+	if (adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
+				    ADF_SRIOV_ENABLED, cfg))
+		return;
+
+	if (!accel_dev->pf.vf_info)
+		return;
+
+	if (adf_add_sriov_configuration(accel_dev))
+		return;
+
+	dev_dbg(&pdev->dev, "Re-enabling SRIOV\n");
+	adf_enable_sriov(accel_dev);
+}
+
 /**
  * adf_disable_sriov() - Disable SRIOV for the device
  * @accel_dev:  Pointer to accel device.
@@ -103,6 +246,7 @@ void adf_disable_sriov(struct adf_accel_dev *accel_dev)
 		return;
 
 	adf_pf2vf_notify_restarting(accel_dev);
+	adf_pf2vf_wait_for_restarting_complete(accel_dev);
 	pci_disable_sriov(accel_to_pci_dev(accel_dev));
 
 	/* Disable VF to PF interrupts */
@@ -112,11 +256,15 @@ void adf_disable_sriov(struct adf_accel_dev *accel_dev)
 	if (hw_data->configure_iov_threads)
 		hw_data->configure_iov_threads(accel_dev, false);
 
-	for (i = 0, vf = accel_dev->pf.vf_info; i < totalvfs; i++, vf++)
+	for (i = 0, vf = accel_dev->pf.vf_info; i < totalvfs; i++, vf++) {
 		mutex_destroy(&vf->pf2vf_lock);
+		mutex_destroy(&vf->pfvf_mig_lock);
+	}
 
-	kfree(accel_dev->pf.vf_info);
-	accel_dev->pf.vf_info = NULL;
+	if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status)) {
+		kfree(accel_dev->pf.vf_info);
+		accel_dev->pf.vf_info = NULL;
+	}
 }
 EXPORT_SYMBOL_GPL(adf_disable_sriov);
 
@@ -135,73 +283,24 @@ EXPORT_SYMBOL_GPL(adf_disable_sriov);
 int adf_sriov_configure(struct pci_dev *pdev, int numvfs)
 {
 	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
-	int totalvfs = pci_sriov_get_totalvfs(pdev);
-	unsigned long val;
-	int ret;
 
 	if (!accel_dev) {
 		dev_err(&pdev->dev, "Failed to find accel_dev\n");
 		return -EFAULT;
 	}
 
-	if (!device_iommu_mapped(&pdev->dev))
-		dev_warn(&pdev->dev, "IOMMU should be enabled for SR-IOV to work correctly\n");
-
-	if (accel_dev->pf.vf_info) {
-		dev_info(&pdev->dev, "Already enabled for this device\n");
-		return -EINVAL;
-	}
-
-	if (adf_dev_started(accel_dev)) {
-		if (adf_devmgr_in_reset(accel_dev) ||
-		    adf_dev_in_use(accel_dev)) {
-			dev_err(&GET_DEV(accel_dev), "Device busy\n");
-			return -EBUSY;
-		}
-
-		ret = adf_dev_down(accel_dev, true);
-		if (ret)
-			return ret;
-	}
-
-	if (adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC))
-		return -EFAULT;
-	val = 0;
-	if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
-					ADF_NUM_CY, (void *)&val, ADF_DEC))
-		return -EFAULT;
-	ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC, ADF_NUM_DC,
-					  &val, ADF_DEC);
-	if (ret)
-		return ret;
-
-	set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
-
-	/* Allocate memory for VF info structs */
-	accel_dev->pf.vf_info = kcalloc(totalvfs,
-					sizeof(struct adf_accel_vf_info),
-					GFP_KERNEL);
-	if (!accel_dev->pf.vf_info)
-		return -ENOMEM;
-
-	if (adf_dev_up(accel_dev, false)) {
-		dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
-			accel_dev->accel_id);
-		return -EFAULT;
-	}
-
-	ret = adf_enable_sriov(accel_dev);
-	if (ret)
-		return ret;
-
-	return numvfs;
+	if (numvfs)
+		return adf_do_enable_sriov(accel_dev);
+	else
+		return adf_do_disable_sriov(accel_dev);
 }
 EXPORT_SYMBOL_GPL(adf_sriov_configure);
 
 int __init adf_init_pf_wq(void)
 {
 	/* Workqueue for PF2VF responses */
-	pf2vf_resp_wq = alloc_workqueue("qat_pf2vf_resp_wq", WQ_MEM_RECLAIM, 0);
+	pf2vf_resp_wq = alloc_workqueue("qat_pf2vf_resp_wq",
+					WQ_MEM_RECLAIM | WQ_PERCPU, 0);
 
 	return !pf2vf_resp_wq ? -ENOMEM : 0;
 }