net: dsa: implement get_ts_stats ethtool operation for user ports

Integrate with the standard infrastructure for reporting hardware packet
timestamping statistics.

Signed-off-by: Vladimir Oltean <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: vladimiroltean

include/net/dsa.h

@@ -906,6 +906,8 @@ struct dsa_switch_ops {
 	void	(*get_rmon_stats)(struct dsa_switch *ds, int port,
 				  struct ethtool_rmon_stats *rmon_stats,
 				  const struct ethtool_rmon_hist_range **ranges);
+	void	(*get_ts_stats)(struct dsa_switch *ds, int port,
+				struct ethtool_ts_stats *ts_stats);
 	void	(*get_stats64)(struct dsa_switch *ds, int port,
 				   struct rtnl_link_stats64 *s);
 	void	(*get_pause_stats)(struct dsa_switch *ds, int port,

net/dsa/user.c

@@ -1150,6 +1150,16 @@ dsa_user_get_rmon_stats(struct net_device *dev,
 		ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges);
 }
 
+static void dsa_user_get_ts_stats(struct net_device *dev,
+				  struct ethtool_ts_stats *ts_stats)
+{
+	struct dsa_port *dp = dsa_user_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
+
+	if (ds->ops->get_ts_stats)
+		ds->ops->get_ts_stats(ds, dp->index, ts_stats);
+}
+
 static void dsa_user_net_selftest(struct net_device *ndev,
 				  struct ethtool_test *etest, u64 *buf)
 {
@@ -2501,6 +2511,7 @@ static const struct ethtool_ops dsa_user_ethtool_ops = {
 	.get_eth_mac_stats	= dsa_user_get_eth_mac_stats,
 	.get_eth_ctrl_stats	= dsa_user_get_eth_ctrl_stats,
 	.get_rmon_stats		= dsa_user_get_rmon_stats,
+	.get_ts_stats		= dsa_user_get_ts_stats,
 	.set_wol		= dsa_user_set_wol,
 	.get_wol		= dsa_user_get_wol,
 	.set_eee		= dsa_user_set_eee,