enetc: Fix HW_VLAN_CTAG_TX|RX toggling

VLAN tag insertion/extraction offload is correctly
activated at probe time but deactivation of this feature
(i.e. via ethtool) is broken.  Toggling works only for
Tx/Rx ring 0 of a PF, and is ignored for the other rings,
including the VF rings.
To fix this, the existing VLAN offload toggling code
was extended to all the rings assigned to a netdevice,
instead of the default ring 0 (likely a leftover from the
early validation days of this feature).  And the code was
moved to the common set_features() function to fix toggling
for the VF driver too.

Fixes: d4fd040 ("enetc: Introduce basic PF and VF ENETC ethernet drivers")
Signed-off-by: Claudiu Manoil <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: claudiu-m

drivers/net/ethernet/freescale/enetc/enetc.c

@@ -1595,6 +1595,24 @@ static int enetc_set_psfp(struct net_device *ndev, int en)
 	return 0;
 }
 
+static void enetc_enable_rxvlan(struct net_device *ndev, bool en)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	int i;
+
+	for (i = 0; i < priv->num_rx_rings; i++)
+		enetc_bdr_enable_rxvlan(&priv->si->hw, i, en);
+}
+
+static void enetc_enable_txvlan(struct net_device *ndev, bool en)
+{
+	struct enetc_ndev_priv *priv = netdev_priv(ndev);
+	int i;
+
+	for (i = 0; i < priv->num_tx_rings; i++)
+		enetc_bdr_enable_txvlan(&priv->si->hw, i, en);
+}
+
 int enetc_set_features(struct net_device *ndev,
 		       netdev_features_t features)
 {
@@ -1604,6 +1622,14 @@ int enetc_set_features(struct net_device *ndev,
 	if (changed & NETIF_F_RXHASH)
 		enetc_set_rss(ndev, !!(features & NETIF_F_RXHASH));
 
+	if (changed & NETIF_F_HW_VLAN_CTAG_RX)
+		enetc_enable_rxvlan(ndev,
+				    !!(features & NETIF_F_HW_VLAN_CTAG_RX));
+
+	if (changed & NETIF_F_HW_VLAN_CTAG_TX)
+		enetc_enable_txvlan(ndev,
+				    !!(features & NETIF_F_HW_VLAN_CTAG_TX));
+
 	if (changed & NETIF_F_HW_TC)
 		err = enetc_set_psfp(ndev, !!(features & NETIF_F_HW_TC));
 

drivers/net/ethernet/freescale/enetc/enetc_hw.h

@@ -531,22 +531,22 @@ struct enetc_msg_cmd_header {
 
 /* Common H/W utility functions */
 
-static inline void enetc_enable_rxvlan(struct enetc_hw *hw, int si_idx,
-				       bool en)
+static inline void enetc_bdr_enable_rxvlan(struct enetc_hw *hw, int idx,
+					   bool en)
 {
-	u32 val = enetc_rxbdr_rd(hw, si_idx, ENETC_RBMR);
+	u32 val = enetc_rxbdr_rd(hw, idx, ENETC_RBMR);
 
 	val = (val & ~ENETC_RBMR_VTE) | (en ? ENETC_RBMR_VTE : 0);
-	enetc_rxbdr_wr(hw, si_idx, ENETC_RBMR, val);
+	enetc_rxbdr_wr(hw, idx, ENETC_RBMR, val);
 }
 
-static inline void enetc_enable_txvlan(struct enetc_hw *hw, int si_idx,
-				       bool en)
+static inline void enetc_bdr_enable_txvlan(struct enetc_hw *hw, int idx,
+					   bool en)
 {
-	u32 val = enetc_txbdr_rd(hw, si_idx, ENETC_TBMR);
+	u32 val = enetc_txbdr_rd(hw, idx, ENETC_TBMR);
 
 	val = (val & ~ENETC_TBMR_VIH) | (en ? ENETC_TBMR_VIH : 0);
-	enetc_txbdr_wr(hw, si_idx, ENETC_TBMR, val);
+	enetc_txbdr_wr(hw, idx, ENETC_TBMR, val);
 }
 
 static inline void enetc_set_bdr_prio(struct enetc_hw *hw, int bdr_idx,

drivers/net/ethernet/freescale/enetc/enetc_pf.c

@@ -649,14 +649,6 @@ static int enetc_pf_set_features(struct net_device *ndev,
 	netdev_features_t changed = ndev->features ^ features;
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 
-	if (changed & NETIF_F_HW_VLAN_CTAG_RX)
-		enetc_enable_rxvlan(&priv->si->hw, 0,
-				    !!(features & NETIF_F_HW_VLAN_CTAG_RX));
-
-	if (changed & NETIF_F_HW_VLAN_CTAG_TX)
-		enetc_enable_txvlan(&priv->si->hw, 0,
-				    !!(features & NETIF_F_HW_VLAN_CTAG_TX));
-
 	if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
 		struct enetc_pf *pf = enetc_si_priv(priv->si);