net/mlx4_en: Add ethtool support for [rx|tx]vlan offload set to OFF/ON

Move mlx4_en_reset_config to en_netdev.c as it now serves more general purpose.
Add support for turning OFF/ON the rx/tx vlan offlad.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 88 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index c4bd2c7a8d2e..3c6a58a94763 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -2190,6 +2190,16 @@ static int mlx4_en_set_features(struct net_device *netdev,
 		netdev_features_t features)
 {
 	struct mlx4_en_priv *priv = netdev_priv(netdev);
+	int ret = 0;
+
+	if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_HW_VLAN_CTAG_RX)) {
+		en_info(priv, "Turn %s RX vlan strip offload\n",
+			(features & NETIF_F_HW_VLAN_CTAG_RX) ? "ON" : "OFF");
+		ret = mlx4_en_reset_config(netdev, priv->hwtstamp_config,
+					   features);
+		if (ret)
+			return ret;
+	}
 
 	if (features & NETIF_F_LOOPBACK)
 		priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
@@ -2559,7 +2569,8 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
 	dev->features = dev->hw_features | NETIF_F_HIGHDMA |
 			NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
 			NETIF_F_HW_VLAN_CTAG_FILTER;
-	dev->hw_features |= NETIF_F_LOOPBACK;
+	dev->hw_features |= NETIF_F_LOOPBACK |
+			NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
 
 	if (mdev->dev->caps.steering_mode ==
 	    MLX4_STEERING_MODE_DEVICE_MANAGED)
@@ -2633,3 +2644,79 @@ out:
 	return err;
 }
 
+int mlx4_en_reset_config(struct net_device *dev,
+			 struct hwtstamp_config ts_config,
+			 netdev_features_t features)
+{
+	struct mlx4_en_priv *priv = netdev_priv(dev);
+	struct mlx4_en_dev *mdev = priv->mdev;
+	int port_up = 0;
+	int err = 0;
+
+	if (priv->hwtstamp_config.tx_type == ts_config.tx_type &&
+	    priv->hwtstamp_config.rx_filter == ts_config.rx_filter &&
+	    !DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX))
+		return 0; /* Nothing to change */
+
+	if (DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX) &&
+	    (features & NETIF_F_HW_VLAN_CTAG_RX) &&
+	    (priv->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE)) {
+		en_warn(priv, "Can't turn ON rx vlan offload while time-stamping rx filter is ON\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&mdev->state_lock);
+	if (priv->port_up) {
+		port_up = 1;
+		mlx4_en_stop_port(dev, 1);
+	}
+
+	mlx4_en_free_resources(priv);
+
+	en_warn(priv, "Changing device configuration rx filter(%x) rx vlan(%x)\n",
+		ts_config.rx_filter, !!(features & NETIF_F_HW_VLAN_CTAG_RX));
+
+	priv->hwtstamp_config.tx_type = ts_config.tx_type;
+	priv->hwtstamp_config.rx_filter = ts_config.rx_filter;
+
+	if (DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX)) {
+		if (features & NETIF_F_HW_VLAN_CTAG_RX)
+			dev->features |= NETIF_F_HW_VLAN_CTAG_RX;
+		else
+			dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
+	} else if (ts_config.rx_filter == HWTSTAMP_FILTER_NONE) {
+		/* RX time-stamping is OFF, update the RX vlan offload
+		 * to the latest wanted state
+		 */
+		if (dev->wanted_features & NETIF_F_HW_VLAN_CTAG_RX)
+			dev->features |= NETIF_F_HW_VLAN_CTAG_RX;
+		else
+			dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
+	}
+
+	/* RX vlan offload and RX time-stamping can't co-exist !
+	 * Regardless of the caller's choice,
+	 * Turn Off RX vlan offload in case of time-stamping is ON
+	 */
+	if (ts_config.rx_filter != HWTSTAMP_FILTER_NONE) {
+		if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
+			en_warn(priv, "Turning off RX vlan offload since RX time-stamping is ON\n");
+		dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
+	}
+
+	err = mlx4_en_alloc_resources(priv);
+	if (err) {
+		en_err(priv, "Failed reallocating port resources\n");
+		goto out;
+	}
+	if (port_up) {
+		err = mlx4_en_start_port(dev);
+		if (err)
+			en_err(priv, "Failed starting port\n");
+	}
+
+out:
+	mutex_unlock(&mdev->state_lock);
+	netdev_features_change(dev);
+	return err;
+}