linux-kernel - [PATCH net-next] enetc: add software timestamping

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Date:   Tue, 10 Dec 2019 01:15:37 +0100
From:   Michael Walle <michael@...le.cc>
To:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     "David S . Miller" <davem@...emloft.net>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH net-next] enetc: add software timestamping

Provide a software TX timestamp and add it to the ethtool query
interface.

skb_tx_timestamp() is also needed if one would like to use PHY
timestamping.

Signed-off-by: Michael Walle <michael@...le.cc>
---
 drivers/net/ethernet/freescale/enetc/enetc.c         | 2 ++
 drivers/net/ethernet/freescale/enetc/enetc_ethtool.c | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c
index 17739906c966..2ee4a2cd4780 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -227,6 +227,8 @@ static int enetc_map_tx_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb,
 	enetc_bdr_idx_inc(tx_ring, &i);
 	tx_ring->next_to_use = i;
 
+	skb_tx_timestamp(skb);
+
 	/* let H/W know BD ring has been updated */
 	enetc_wr_reg(tx_ring->tpir, i); /* includes wmb() */
 
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
index 880a8ed8bb47..301ee0dde02d 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
@@ -579,6 +579,7 @@ static int enetc_get_ts_info(struct net_device *ndev,
 			   (1 << HWTSTAMP_FILTER_ALL);
 #else
 	info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
+				SOF_TIMESTAMPING_TX_SOFTWARE |
 				SOF_TIMESTAMPING_SOFTWARE;
 #endif
 	return 0;
-- 
2.20.1