linux-kernel - [PATCH net-next] gve: Correctly report software timestamping capabilities

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Date: Mon,  8 Apr 2024 11:09:01 -0700
From: John Fraker <jfraker@...gle.com>
To: netdev@...r.kernel.org
Cc: John Fraker <jfraker@...gle.com>, Praveen Kaligineedi <pkaligineedi@...gle.com>, 
	Harshitha Ramamurthy <hramamurthy@...gle.com>, Shailend Chand <shailend@...gle.com>, 
	Willem de Bruijn <willemb@...gle.com>, "David S. Miller" <davem@...emloft.net>, 
	Jakub Kicinski <kuba@...nel.org>, Junfeng Guo <junfeng.guo@...el.com>, 
	Ziwei Xiao <ziweixiao@...gle.com>, Jeroen de Borst <jeroendb@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH net-next] gve: Correctly report software timestamping capabilities

gve has supported software timestamp generation since its inception,
but has not advertised that support via ethtool. This patch correctly
advertises that support.

Reviewed-by: Praveen Kaligineedi <pkaligineedi@...gle.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@...gle.com>
Signed-off-by: John Fraker <jfraker@...gle.com>

---
 drivers/net/ethernet/google/gve/gve_ethtool.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c
index 815dead..99f5aeb 100644
--- a/drivers/net/ethernet/google/gve/gve_ethtool.c
+++ b/drivers/net/ethernet/google/gve/gve_ethtool.c
@@ -4,6 +4,8 @@
  * Copyright (C) 2015-2021 Google, Inc.
  */
 
+#include <linux/ethtool.h>
+#include <linux/net_tstamp.h>
 #include <linux/rtnetlink.h>
 #include "gve.h"
 #include "gve_adminq.h"
@@ -763,6 +765,15 @@ static int gve_set_coalesce(struct net_device *netdev,
 	return 0;
 }
 
+static int gve_get_ts_info(struct net_device *netdev, struct ethtool_ts_info *info)
+{
+	info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
+				SOF_TIMESTAMPING_TX_SOFTWARE |
+				SOF_TIMESTAMPING_SOFTWARE;
+
+	return 0;
+}
+
 const struct ethtool_ops gve_ethtool_ops = {
 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS,
 	.supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT,
@@ -784,5 +795,6 @@ const struct ethtool_ops gve_ethtool_ops = {
 	.set_tunable = gve_set_tunable,
 	.get_priv_flags = gve_get_priv_flags,
 	.set_priv_flags = gve_set_priv_flags,
-	.get_link_ksettings = gve_get_link_ksettings
+	.get_link_ksettings = gve_get_link_ksettings,
+	.get_ts_info = gve_get_ts_info
 };
-- 
2.44.0.478.gd926399ef9-goog