The kernel now has common statistics for transmit timestamps, so
implement them in the ice driver.

use via
ethtool -I -T eth0

Reviewed-by: Jacob Keller <jacob.e.kel...@intel.com>
Reviewed-by: Jakub Kicinski <k...@kernel.org>
Reviewed-by: Hariprasad Kelam <hke...@marvell.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeb...@intel.com>
---

$ sudo ethtool -I -T eth0
Time stamping parameters for eth0:
Capabilities:
        hardware-transmit
        software-transmit
        hardware-receive
        software-receive
        software-system-clock
        hardware-raw-clock
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
        off
        on
Hardware Receive Filter Modes:
        none
        all
Statistics:
  tx_pkts: 17
  tx_lost: 0
  tx_err: 0
---
 drivers/net/ethernet/intel/ice/ice_ethtool.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c 
b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index 6f0a857f55c9..97a7a0632a1d 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -4357,6 +4357,23 @@ static void ice_get_rmon_stats(struct net_device *netdev,
        *ranges = ice_rmon_ranges;
 }
 
+/* ice_get_ts_stats - provide timestamping stats
+ * @netdev: the netdevice pointer from ethtool
+ * @ts_stats: the ethtool data structure to fill in
+ */
+static void ice_get_ts_stats(struct net_device *netdev,
+                            struct ethtool_ts_stats *ts_stats)
+{
+       struct ice_pf *pf = ice_netdev_to_pf(netdev);
+       struct ice_ptp *ptp = &pf->ptp;
+
+       ts_stats->pkts = ptp->tx_hwtstamp_good;
+       ts_stats->err = ptp->tx_hwtstamp_skipped +
+                       ptp->tx_hwtstamp_flushed +
+                       ptp->tx_hwtstamp_discarded;
+       ts_stats->lost = ptp->tx_hwtstamp_timeouts;
+}
+
 static const struct ethtool_ops ice_ethtool_ops = {
        .cap_rss_ctx_supported  = true,
        .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
@@ -4407,6 +4424,7 @@ static const struct ethtool_ops ice_ethtool_ops = {
        .get_eth_mac_stats      = ice_get_eth_mac_stats,
        .get_pause_stats        = ice_get_pause_stats,
        .get_rmon_stats         = ice_get_rmon_stats,
+       .get_ts_stats           = ice_get_ts_stats,
 };
 
 static const struct ethtool_ops ice_ethtool_safe_mode_ops = {
-- 
2.43.0

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