igc: Add support for ethtool GET_TS_INFO command

This command allows igc to report what types of timestamping are
supported. ptp4l uses this to detect if the hardware supports
timestamping.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/igc/igc_ethtool.c

@@ -1600,6 +1600,39 @@ static int igc_set_channels(struct net_device *netdev,
 	return 0;
 }
 
+static int igc_get_ts_info(struct net_device *dev,
+			   struct ethtool_ts_info *info)
+{
+	struct igc_adapter *adapter = netdev_priv(dev);
+
+	if (adapter->ptp_clock)
+		info->phc_index = ptp_clock_index(adapter->ptp_clock);
+	else
+		info->phc_index = -1;
+
+	switch (adapter->hw.mac.type) {
+	case igc_i225:
+		info->so_timestamping =
+			SOF_TIMESTAMPING_TX_SOFTWARE |
+			SOF_TIMESTAMPING_RX_SOFTWARE |
+			SOF_TIMESTAMPING_SOFTWARE |
+			SOF_TIMESTAMPING_TX_HARDWARE |
+			SOF_TIMESTAMPING_RX_HARDWARE |
+			SOF_TIMESTAMPING_RAW_HARDWARE;
+
+		info->tx_types =
+			BIT(HWTSTAMP_TX_OFF) |
+			BIT(HWTSTAMP_TX_ON);
+
+		info->rx_filters = BIT(HWTSTAMP_FILTER_NONE);
+		info->rx_filters |= BIT(HWTSTAMP_FILTER_ALL);
+
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static u32 igc_get_priv_flags(struct net_device *netdev)
 {
 	struct igc_adapter *adapter = netdev_priv(netdev);
@@ -1847,6 +1880,7 @@ static const struct ethtool_ops igc_ethtool_ops = {
 	.get_rxfh_indir_size	= igc_get_rxfh_indir_size,
 	.get_rxfh		= igc_get_rxfh,
 	.set_rxfh		= igc_set_rxfh,
+	.get_ts_info		= igc_get_ts_info,
 	.get_channels		= igc_get_channels,
 	.set_channels		= igc_set_channels,
 	.get_priv_flags		= igc_get_priv_flags,