linux-kernel - [PATCH net-next] net: gianfar: convert to ndo_hwtstamp_get() and ndo_hwtstamp

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Message-ID: <20250508143659.1944220-1-vladimir.oltean@nxp.com>
Date: Thu,  8 May 2025 17:36:59 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org
Cc: Köry Maincent <kory.maincent@...tlin.com>,
	Claudiu Manoil <claudiu.manoil@....com>,
	Andrew Lunn <andrew@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Richard Cochran <richardcochran@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next] net: gianfar: convert to ndo_hwtstamp_get() and ndo_hwtstamp_set()

New timestamping API was introduced in commit 66f7223039c0 ("net: add
NDOs for configuring hardware timestamping") from kernel v6.6. It is
time to convert the gianfar driver to the new API, so that the
ndo_eth_ioctl() path can be removed completely.

Don't propagate the unnecessary "config.flags = 0;" assignment to
gfar_hwtstamp_get(), because dev_get_hwtstamp() provides a zero
initialized struct kernel_hwtstamp_config.

After removing timestamping logic from gfar_ioctl(), the rest is
equivalent to phy_do_ioctl_running(), so provide that directly as our
ndo_eth_ioctl() implementation.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
Tested-by: Vladimir Oltean <vladimir.oltean@....com> # LS1021A
---
 drivers/net/ethernet/freescale/gianfar.c | 53 +++++++-----------------
 1 file changed, 16 insertions(+), 37 deletions(-)

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index deb35b38c976..bcbcad613512 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -2061,15 +2061,13 @@ static void gfar_timeout(struct net_device *dev, unsigned int txqueue)
 	schedule_work(&priv->reset_task);
 }
 
-static int gfar_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
+static int gfar_hwtstamp_set(struct net_device *netdev,
+			     struct kernel_hwtstamp_config *config,
+			     struct netlink_ext_ack *extack)
 {
-	struct hwtstamp_config config;
 	struct gfar_private *priv = netdev_priv(netdev);
 
-	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
-		return -EFAULT;
-
-	switch (config.tx_type) {
+	switch (config->tx_type) {
 	case HWTSTAMP_TX_OFF:
 		priv->hwts_tx_en = 0;
 		break;
@@ -2082,7 +2080,7 @@ static int gfar_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
 		return -ERANGE;
 	}
 
-	switch (config.rx_filter) {
+	switch (config->rx_filter) {
 	case HWTSTAMP_FILTER_NONE:
 		if (priv->hwts_rx_en) {
 			priv->hwts_rx_en = 0;
@@ -2096,44 +2094,23 @@ static int gfar_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
 			priv->hwts_rx_en = 1;
 			reset_gfar(netdev);
 		}
-		config.rx_filter = HWTSTAMP_FILTER_ALL;
+		config->rx_filter = HWTSTAMP_FILTER_ALL;
 		break;
 	}
 
-	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
-		-EFAULT : 0;
+	return 0;
 }
 
-static int gfar_hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
+static int gfar_hwtstamp_get(struct net_device *netdev,
+			     struct kernel_hwtstamp_config *config)
 {
-	struct hwtstamp_config config;
 	struct gfar_private *priv = netdev_priv(netdev);
 
-	config.flags = 0;
-	config.tx_type = priv->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
-	config.rx_filter = (priv->hwts_rx_en ?
-			    HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE);
-
-	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
-		-EFAULT : 0;
-}
-
-static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
-	struct phy_device *phydev = dev->phydev;
+	config->tx_type = priv->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
+	config->rx_filter = priv->hwts_rx_en ? HWTSTAMP_FILTER_ALL :
+			    HWTSTAMP_FILTER_NONE;
 
-	if (!netif_running(dev))
-		return -EINVAL;
-
-	if (cmd == SIOCSHWTSTAMP)
-		return gfar_hwtstamp_set(dev, rq);
-	if (cmd == SIOCGHWTSTAMP)
-		return gfar_hwtstamp_get(dev, rq);
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_mii_ioctl(phydev, rq, cmd);
+	return 0;
 }
 
 /* Interrupt Handler for Transmit complete */
@@ -3174,7 +3151,7 @@ static const struct net_device_ops gfar_netdev_ops = {
 	.ndo_set_features = gfar_set_features,
 	.ndo_set_rx_mode = gfar_set_multi,
 	.ndo_tx_timeout = gfar_timeout,
-	.ndo_eth_ioctl = gfar_ioctl,
+	.ndo_eth_ioctl = phy_do_ioctl_running,
 	.ndo_get_stats64 = gfar_get_stats64,
 	.ndo_change_carrier = fixed_phy_change_carrier,
 	.ndo_set_mac_address = gfar_set_mac_addr,
@@ -3182,6 +3159,8 @@ static const struct net_device_ops gfar_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller = gfar_netpoll,
 #endif
+	.ndo_hwtstamp_get = gfar_hwtstamp_get,
+	.ndo_hwtstamp_set = gfar_hwtstamp_set,
 };
 
 /* Set up the ethernet device structure, private data,
-- 
2.43.0