rocker: implement get settings mode command

Introduce a helper to ask HW for the port mode (world).
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/rocker/rocker_main.c

@@ -1495,6 +1495,30 @@ rocker_cmd_get_port_settings_macaddr_proc(const struct rocker_port *rocker_port,
 	return 0;
 }
 
+static int
+rocker_cmd_get_port_settings_mode_proc(const struct rocker_port *rocker_port,
+				       const struct rocker_desc_info *desc_info,
+				       void *priv)
+{
+	u8 *p_mode = priv;
+	const struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
+	const struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
+	const struct rocker_tlv *attr;
+
+	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
+	if (!attrs[ROCKER_TLV_CMD_INFO])
+		return -EIO;
+
+	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
+				attrs[ROCKER_TLV_CMD_INFO]);
+	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE];
+	if (!attr)
+		return -EIO;
+
+	*p_mode = rocker_tlv_get_u8(info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MODE]);
+	return 0;
+}
+
 struct port_name {
 	char *buf;
 	size_t len;
@@ -1660,6 +1684,14 @@ static int rocker_cmd_get_port_settings_macaddr(struct rocker_port *rocker_port,
 			       macaddr);
 }
 
+static int rocker_cmd_get_port_settings_mode(struct rocker_port *rocker_port,
+					     u8 *p_mode)
+{
+	return rocker_cmd_exec(rocker_port, NULL, 0,
+			       rocker_cmd_get_port_settings_prep, NULL,
+			       rocker_cmd_get_port_settings_mode_proc, p_mode);
+}
+
 static int rocker_cmd_set_port_settings_ethtool(struct rocker_port *rocker_port,
 						struct ethtool_cmd *ecmd)
 {