[Intel-wired-lan] [PATCH net v1] iavf: Fix handling of vlan strip virtual channel messages
Michal Maloszewski
michal.maloszewski at intel.com
Thu Jan 13 13:48:28 UTC 2022
Modify netdev->features for vlan stripping based on virtual
channel messages received from the PF. Change is needed
to synchronize vlan strip status between PF sysfs and iavf ethtool.
Fixes: 310a2ad92e3f ("virtchnl: rename i40e to generic virtchnl")
Signed-off-by: Norbert Ciosek <norbertx.ciosek at intel.com>
Signed-off-by: Michal Maloszewski <michal.maloszewski at intel.com>
Signed-off-by: Brett Creeley <brett.creeley at intel.com>
---
v3: NETIF_F_HW_VLAN_RX changed into NETIF_F_HW_VLAN_CTAG_RX because there's
no such definition since Linux 3.10. The code is the same as the one from OOT.
Code successfully passed inner review. netdev_update_features() function is not added
because it causes infinite loop.
.../net/ethernet/intel/iavf/iavf_virtchnl.c | 42 +++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
index a40e29455f7d..1805c1ae3bf4 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
@@ -1490,6 +1490,24 @@ void iavf_request_reset(struct iavf_adapter *adapter)
adapter->current_op = VIRTCHNL_OP_UNKNOWN;
}
+/**
+ * iavf_netdev_features_vlan_strip_set - update vlan strip status
+ * @netdev: ptr to netdev being adjusted
+ * @enable: enable or disable vlan strip
+ *
+ * Helper function to change vlan strip status in netdev->features.
+ */
+static void iavf_netdev_features_vlan_strip_set(struct net_device *netdev,
+ const bool enable)
+{
+ if (enable)
+ netdev->features |=
+ NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_RX;
+ else
+ netdev->features &=
+ ~NETIF_F_HW_VLAN_CTAG_RX & ~NETIF_F_HW_VLAN_CTAG_RX;
+}
+
/**
* iavf_virtchnl_completion
* @adapter: adapter structure
@@ -1713,8 +1731,18 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter,
}
break;
case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
+ dev_warn(&adapter->pdev->dev, "Changing VLAN Stripping is not allowed when Port VLAN is configured\n");
+ /* Vlan stripping could not be enabled by ethtool.
+ * Disable it in netdev->features.
+ */
+ iavf_netdev_features_vlan_strip_set(netdev, false);
+ break;
case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
dev_warn(&adapter->pdev->dev, "Changing VLAN Stripping is not allowed when Port VLAN is configured\n");
+ /* Vlan stripping could not be disabled by ethtool.
+ * Enable it in netdev->features.
+ */
+ iavf_netdev_features_vlan_strip_set(netdev, true);
break;
default:
dev_err(&adapter->pdev->dev, "PF returned error %d (%s) to our request %d\n",
@@ -1960,6 +1988,20 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter,
spin_unlock_bh(&adapter->adv_rss_lock);
}
break;
+ case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
+ /* PF enabled vlan strip on this VF.
+ * Update netdev->features if needed to be in sync with ethtool.
+ */
+ if (!v_retval)
+ iavf_netdev_features_vlan_strip_set(netdev, true);
+ break;
+ case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
+ /* PF disabled vlan strip on this VF.
+ * Update netdev->features if needed to be in sync with ethtool.
+ */
+ if (!v_retval)
+ iavf_netdev_features_vlan_strip_set(netdev, false);
+ break;
default:
if (adapter->current_op && (v_opcode != adapter->current_op))
dev_warn(&adapter->pdev->dev, "Expected response %d from PF, received %d\n",
--
2.27.0
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