linux-kernel - [PATCH net-next v5 8/8] gve: Advertise support for rx hardware timestamping

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Message-ID: <20250614000754.164827-9-hramamurthy@google.com>
Date: Sat, 14 Jun 2025 00:07:54 +0000
From: Harshitha Ramamurthy <hramamurthy@...gle.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	pabeni@...hat.com, jeroendb@...gle.com, hramamurthy@...gle.com, 
	andrew+netdev@...n.ch, willemb@...gle.com, ziweixiao@...gle.com, 
	pkaligineedi@...gle.com, yyd@...gle.com, joshwash@...gle.com, 
	shailend@...gle.com, linux@...blig.org, thostet@...gle.com, 
	jfraker@...gle.com, richardcochran@...il.com, jdamato@...tly.com, 
	vadim.fedorenko@...ux.dev, horms@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next v5 8/8] gve: Advertise support for rx hardware timestamping

From: John Fraker <jfraker@...gle.com>

Expand the get_ts_info ethtool handler with the new gve_get_ts_info
which advertises support for rx hardware timestamping.

With this patch, the driver now fully supports rx hardware timestamping.

Signed-off-by: John Fraker <jfraker@...gle.com>
Signed-off-by: Ziwei Xiao <ziweixiao@...gle.com>
Reviewed-by: Willem de Bruijn <willemb@...gle.com>
Signed-off-by: Harshitha Ramamurthy <hramamurthy@...gle.com>
---
 Changes in v5:
  - Add the phc_index info into the gve_get_ts_info. (Jakub Kicinski)
---
 drivers/net/ethernet/google/gve/gve_ethtool.c | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c
index 6ecbcee4ec13..8dbd7639e115 100644
--- a/drivers/net/ethernet/google/gve/gve_ethtool.c
+++ b/drivers/net/ethernet/google/gve/gve_ethtool.c
@@ -923,6 +923,27 @@ static int gve_set_rxfh(struct net_device *netdev, struct ethtool_rxfh_param *rx
 	return 0;
 }
 
+static int gve_get_ts_info(struct net_device *netdev,
+			   struct kernel_ethtool_ts_info *info)
+{
+	struct gve_priv *priv = netdev_priv(netdev);
+
+	ethtool_op_get_ts_info(netdev, info);
+
+	if (priv->nic_timestamp_supported) {
+		info->so_timestamping |= SOF_TIMESTAMPING_RX_HARDWARE |
+					 SOF_TIMESTAMPING_RAW_HARDWARE;
+
+		info->rx_filters |= BIT(HWTSTAMP_FILTER_NONE) |
+				    BIT(HWTSTAMP_FILTER_ALL);
+
+		if (priv->ptp)
+			info->phc_index = ptp_clock_index(priv->ptp->clock);
+	}
+
+	return 0;
+}
+
 const struct ethtool_ops gve_ethtool_ops = {
 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS,
 	.supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT,
@@ -951,5 +972,5 @@ const struct ethtool_ops gve_ethtool_ops = {
 	.get_priv_flags = gve_get_priv_flags,
 	.set_priv_flags = gve_set_priv_flags,
 	.get_link_ksettings = gve_get_link_ksettings,
-	.get_ts_info = ethtool_op_get_ts_info,
+	.get_ts_info = gve_get_ts_info,
 };
-- 
2.50.0.rc1.591.g9c95f17f64-goog