netdev - [PATCH net-next] net: gianfar: add support for software TX timestamping

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Date:   Wed, 29 Jun 2022 21:13:35 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Richard Cochran <richardcochran@...il.com>
Subject: [PATCH net-next] net: gianfar: add support for software TX timestamping

These are required by certain network profiling applications in order to
measure delays.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/ethernet/freescale/gianfar.c         | 1 +
 drivers/net/ethernet/freescale/gianfar_ethtool.c | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index 3dc9369a33f7..e7bf1524b68e 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -1944,6 +1944,7 @@ static netdev_tx_t gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
 	}
 
+	skb_tx_timestamp(skb);
 	netdev_tx_sent_queue(txq, bytes_sent);
 
 	gfar_wmb();
diff --git a/drivers/net/ethernet/freescale/gianfar_ethtool.c b/drivers/net/ethernet/freescale/gianfar_ethtool.c
index 9a2c16d69e2c..81fb68730138 100644
--- a/drivers/net/ethernet/freescale/gianfar_ethtool.c
+++ b/drivers/net/ethernet/freescale/gianfar_ethtool.c
@@ -1457,6 +1457,7 @@ static int gfar_get_ts_info(struct net_device *dev,
 
 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) {
 		info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
+					SOF_TIMESTAMPING_TX_SOFTWARE |
 					SOF_TIMESTAMPING_SOFTWARE;
 		return 0;
 	}
@@ -1474,7 +1475,10 @@ static int gfar_get_ts_info(struct net_device *dev,
 
 	info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
 				SOF_TIMESTAMPING_RX_HARDWARE |
-				SOF_TIMESTAMPING_RAW_HARDWARE;
+				SOF_TIMESTAMPING_RAW_HARDWARE |
+				SOF_TIMESTAMPING_RX_SOFTWARE |
+				SOF_TIMESTAMPING_TX_SOFTWARE |
+				SOF_TIMESTAMPING_SOFTWARE;
 	info->tx_types = (1 << HWTSTAMP_TX_OFF) |
 			 (1 << HWTSTAMP_TX_ON);
 	info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
-- 
2.25.1