ralink: improve tx vlan offload

hardware tx vlan offload only support max 16 vids
now use add/delete vlan interface to update vlan id table
when duplicate vlan id index detect.
disable hardware tx vlan offload support.

Signed-off-by: michael lee <igvtee@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43301 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 55 insertions, 0 deletions

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c
index f09751040b..c62fb8f56d 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.c
@@ -418,6 +418,54 @@ static struct rtnl_link_stats64 *fe_get_stats64(struct net_device *dev,
 	return storage;
 }
 
+static int fe_vlan_rx_add_vid(struct net_device *dev,
+		__be16 proto, u16 vid)
+{
+	struct fe_priv *priv = netdev_priv(dev);
+	u32 idx = (vid & 0xf);
+	u32 vlan_cfg;
+
+	if (!((fe_reg_table[FE_REG_FE_DMA_VID_BASE]) &&
+			(dev->features | NETIF_F_HW_VLAN_CTAG_TX)))
+		return 0;
+
+	if (test_bit(idx, &priv->vlan_map)) {
+		netdev_warn(dev, "disable tx vlan offload\n");
+		dev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_TX;
+		netdev_update_features(dev);
+	} else {
+		vlan_cfg = fe_r32(fe_reg_table[FE_REG_FE_DMA_VID_BASE] +
+				((idx >> 1) << 2));
+		if (idx & 0x1) {
+			vlan_cfg &= 0xffff;
+			vlan_cfg |= (vid << 16);
+		} else {
+			vlan_cfg &= 0xffff0000;
+			vlan_cfg |= vid;
+		}
+		fe_w32(vlan_cfg, fe_reg_table[FE_REG_FE_DMA_VID_BASE] +
+				((idx >> 1) << 2));
+		set_bit(idx, &priv->vlan_map);
+	}
+
+	return 0;
+}
+
+static int fe_vlan_rx_kill_vid(struct net_device *dev,
+		__be16 proto, u16 vid)
+{
+	struct fe_priv *priv = netdev_priv(dev);
+	u32 idx = (vid & 0xf);
+
+	if (!((fe_reg_table[FE_REG_FE_DMA_VID_BASE]) &&
+				(dev->features | NETIF_F_HW_VLAN_CTAG_TX)))
+		return 0;
+
+	clear_bit(idx, &priv->vlan_map);
+
+	return 0;
+}
+
 static int fe_tx_map_dma(struct sk_buff *skb, struct net_device *dev,
 		int idx)
 {
@@ -1182,6 +1230,8 @@ static const struct net_device_ops fe_netdev_ops = {
 	.ndo_change_mtu		= fe_change_mtu,
 	.ndo_tx_timeout		= fe_tx_timeout,
 	.ndo_get_stats64        = fe_get_stats64,
+	.ndo_vlan_rx_add_vid	= fe_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= fe_vlan_rx_kill_vid,
 };
 
 static int fe_probe(struct platform_device *pdev)
@@ -1237,6 +1287,10 @@ static int fe_probe(struct platform_device *pdev)
 		~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX);
 	netdev->features |= netdev->hw_features;
 
+	/* fake rx vlan filter func. to support tx vlan offload func */
+	if (fe_reg_table[FE_REG_FE_DMA_VID_BASE])
+		netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+
 	priv = netdev_priv(netdev);
 	spin_lock_init(&priv->page_lock);
 	if (fe_reg_table[FE_REG_FE_COUNTER_BASE]) {
diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h
index 67d5ce65cf..8245330fbc 100644
--- a/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h
+++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/ralink_soc_eth.h
@@ -432,6 +432,7 @@ struct fe_priv
 	int				link[8];
 
 	struct fe_hw_stats		*hw_stats;
+	unsigned long			vlan_map;
 };
 
 extern const struct of_device_id of_fe_match[];