Merge branch 'ethtool-get_ts_stats-for-dsa-and-ocelot-driver'

Vladimir Oltean says:

====================
ethtool get_ts_stats() for DSA and ocelot driver

After a recent patch set with fixes and general restructuring, Jakub asked
for the Felix DSA driver to start reporting standardized statistics
for hardware timestamping:
https://lore.kernel.org/netdev/20241207180640.12da60ed@kernel.org/

Testing follows the same procedure as in the aforementioned series, with PTP
packet loss induced through taprio:

$ ethtool -I --show-time-stamping swp3
Time stamping parameters for swp3:
Capabilities:
        hardware-transmit
        software-transmit
        hardware-receive
        software-receive
        software-system-clock
        hardware-raw-clock
PTP Hardware Clock: 1
Hardware Transmit Timestamp Modes:
        off
        on
        onestep-sync
Hardware Receive Filter Modes:
        none
        ptpv2-l4-event
        ptpv2-l2-event
        ptpv2-event
Statistics:
  tx_pkts: 14591
  tx_lost: 85
  tx_err: 0

v1: https://lore.kernel.org/20241213140852.1254063-1-vladimir.oltean@nxp.com/
====================

Link: https://patch.msgid.link/20250116104628.123555-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

4 files changed, 21 insertions, 0 deletions

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index e4136b0df892..64301ddf2f59 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -559,6 +559,12 @@ struct ethtool_rmon_stats {
 /**
  * struct ethtool_ts_stats - HW timestamping statistics
  * @pkts: Number of packets successfully timestamped by the hardware.
+ * @onestep_pkts_unconfirmed: Number of PTP packets with one-step TX
+ *			      timestamping that were sent, but for which the
+ *			      device offers no confirmation whether they made
+ *			      it onto the wire and the timestamp was inserted
+ *			      in the originTimestamp or correctionField, or
+ *			      not.
  * @lost: Number of hardware timestamping requests where the timestamping
  *	information from the hardware never arrived for submission with
  *	the skb.
@@ -571,6 +577,7 @@ struct ethtool_rmon_stats {
 struct ethtool_ts_stats {
 	struct_group(tx_stats,
 		u64 pkts;
+		u64 onestep_pkts_unconfirmed;
 		u64 lost;
 		u64 err;
 	);
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 9640d5c67f56..a0a9481c52c2 100644
--- a/include/net/dsa.h
+++ b/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,
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 2db9ae0575b6..6db7fc9dbaa4 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -759,6 +759,14 @@ struct ocelot_mm_state {
 	u8 active_preemptible_tcs;
 };
 
+struct ocelot_ts_stats {
+	u64 pkts;
+	u64 onestep_pkts_unconfirmed;
+	u64 lost;
+	u64 err;
+	struct u64_stats_sync syncp;
+};
+
 struct ocelot_port;
 
 struct ocelot_port {
@@ -778,6 +786,7 @@ struct ocelot_port {
 
 	phy_interface_t			phy_mode;
 
+	struct ocelot_ts_stats		*ts_stats;
 	struct sk_buff_head		tx_skbs;
 
 	unsigned int			trap_proto;
@@ -1023,6 +1032,8 @@ void ocelot_port_get_eth_mac_stats(struct ocelot *ocelot, int port,
 				   struct ethtool_eth_mac_stats *mac_stats);
 void ocelot_port_get_eth_phy_stats(struct ocelot *ocelot, int port,
 				   struct ethtool_eth_phy_stats *phy_stats);
+void ocelot_port_get_ts_stats(struct ocelot *ocelot, int port,
+			      struct ethtool_ts_stats *ts_stats);
 int ocelot_get_ts_info(struct ocelot *ocelot, int port,
 		       struct kernel_ethtool_ts_info *info);
 void ocelot_set_ageing_time(struct ocelot *ocelot, unsigned int msecs);
diff --git a/include/uapi/linux/ethtool_netlink_generated.h b/include/uapi/linux/ethtool_netlink_generated.h
index 2e17ff348f89..fe24c3459ac0 100644
--- a/include/uapi/linux/ethtool_netlink_generated.h
+++ b/include/uapi/linux/ethtool_netlink_generated.h
@@ -382,6 +382,7 @@ enum {
 	ETHTOOL_A_TS_STAT_TX_PKTS,
 	ETHTOOL_A_TS_STAT_TX_LOST,
 	ETHTOOL_A_TS_STAT_TX_ERR,
+	ETHTOOL_A_TS_STAT_TX_ONESTEP_PKTS_UNCONFIRMED,
 
 	__ETHTOOL_A_TS_STAT_CNT,
 	ETHTOOL_A_TS_STAT_MAX = (__ETHTOOL_A_TS_STAT_CNT - 1)