bnxt_en: Disallow forced speed for 10GBaseT devices.

10GBaseT devices must autonegotiate to determine master/slave clocking.
Disallow forced speed in ethtool .set_settings() for these devices.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -4611,6 +4611,7 @@ static int bnxt_update_link(struct bnxt *bp, bool chng_link_state)
 	link_info->phy_ver[1] = resp->phy_min;
 	link_info->phy_ver[2] = resp->phy_bld;
 	link_info->media_type = resp->media_type;
+	link_info->phy_type = resp->phy_type;
 	link_info->transceiver = resp->xcvr_pkg_type;
 	link_info->phy_addr = resp->eee_config_phy_addr &
 			      PORT_PHY_QCFG_RESP_PHY_ADDR_MASK;

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -759,6 +759,7 @@ struct bnxt_ntuple_filter {
 };
 
 struct bnxt_link_info {
+	u8			phy_type;
 	u8			media_type;
 	u8			transceiver;
 	u8			phy_addr;

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

@@ -850,7 +850,15 @@ static int bnxt_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 		set_pause = true;
 	} else {
 		u16 fw_speed;
+		u8 phy_type = link_info->phy_type;
 
+		if (phy_type == PORT_PHY_QCFG_RESP_PHY_TYPE_BASET  ||
+		    phy_type == PORT_PHY_QCFG_RESP_PHY_TYPE_BASETE ||
+		    link_info->media_type == PORT_PHY_QCFG_RESP_MEDIA_TYPE_TP) {
+			netdev_err(dev, "10GBase-T devices must autoneg\n");
+			rc = -EINVAL;
+			goto set_setting_exit;
+		}
 		/* TODO: currently don't support half duplex */
 		if (cmd->duplex == DUPLEX_HALF) {
 			netdev_err(dev, "HALF DUPLEX is not supported!\n");