net: hns3: Fix speed/duplex information loss problem when executing ethtool ethx cmd of VF

Our VF has not implemented the ops for get_port_type. So when we executing
ethtool ethx cmd of VF, hns3_get_link_ksettings will return directly. And
we can not query anything.

To support get_link_ksettings for VF, this patch replaces get_port_type
with get_media_type. If the media type is HNAE3_MEDIA_TYPE_NONE,
hns3_get_link_ksettings will return link information of VF.

Fixes: 12f46bc1 ("net: hns3: Refine hns3_get_link_ksettings()")
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c

@@ -545,32 +545,17 @@ static int hns3_set_pauseparam(struct net_device *netdev,
 	return -EOPNOTSUPP;
 }
 
-static int hns3_get_link_ksettings(struct net_device *netdev,
+static void hns3_get_ksettings(struct hnae3_handle *h,
 			       struct ethtool_link_ksettings *cmd)
 {
-	struct hnae3_handle *h = hns3_get_handle(netdev);
-	const struct hnae3_ae_ops *ops;
-	u8 link_stat;
-
-	if (!h->ae_algo || !h->ae_algo->ops)
-		return -EOPNOTSUPP;
-
-	ops = h->ae_algo->ops;
-	if (ops->get_port_type)
-		ops->get_port_type(h, &cmd->base.port);
-	else
-		return -EOPNOTSUPP;
+	const struct hnae3_ae_ops *ops = h->ae_algo->ops;
 
-	switch (cmd->base.port) {
-	case PORT_FIBRE:
 	/* 1.auto_neg & speed & duplex from cmd */
 	if (ops->get_ksettings_an_result)
 		ops->get_ksettings_an_result(h,
 					     &cmd->base.autoneg,
 					     &cmd->base.speed,
 					     &cmd->base.duplex);
-		else
-			return -EOPNOTSUPP;
 
 	/* 2.get link mode*/
 	if (ops->get_link_mode)
@@ -582,18 +567,45 @@ static int hns3_get_link_ksettings(struct net_device *netdev,
 	if (ops->get_mdix_mode)
 		ops->get_mdix_mode(h, &cmd->base.eth_tp_mdix_ctrl,
 				   &cmd->base.eth_tp_mdix);
+}
 
+static int hns3_get_link_ksettings(struct net_device *netdev,
+				   struct ethtool_link_ksettings *cmd)
+{
+	struct hnae3_handle *h = hns3_get_handle(netdev);
+	const struct hnae3_ae_ops *ops;
+	u8 media_type;
+	u8 link_stat;
+
+	if (!h->ae_algo || !h->ae_algo->ops)
+		return -EOPNOTSUPP;
+
+	ops = h->ae_algo->ops;
+	if (ops->get_media_type)
+		ops->get_media_type(h, &media_type);
+	else
+		return -EOPNOTSUPP;
+
+	switch (media_type) {
+	case HNAE3_MEDIA_TYPE_NONE:
+		cmd->base.port = PORT_NONE;
+		hns3_get_ksettings(h, cmd);
+		break;
+	case HNAE3_MEDIA_TYPE_FIBER:
+		cmd->base.port = PORT_FIBRE;
+		hns3_get_ksettings(h, cmd);
 		break;
-	case PORT_TP:
+	case HNAE3_MEDIA_TYPE_COPPER:
 		if (!netdev->phydev)
 			return -EOPNOTSUPP;
 
+		cmd->base.port = PORT_TP;
 		phy_ethtool_ksettings_get(netdev->phydev, cmd);
 
 		break;
 	default:
-		netdev_warn(netdev,
-			    "Unknown port type, neither Fibre/Copper detected");
+
+		netdev_warn(netdev, "Unknown media type");
 		return 0;
 	}