linux-kernel - [PATCH net-next] net: mvpp2: convert to ndo_hwtstamp_get() and ndo_hwtstamp

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Message-ID: <20250508144630.1979215-1-vladimir.oltean@nxp.com>
Date: Thu,  8 May 2025 17:46:30 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org
Cc: Köry Maincent <kory.maincent@...tlin.com>,
	Marcin Wojtas <marcin.s.wojtas@...il.com>,
	Russell King <linux@...linux.org.uk>,
	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: mvpp2: 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 mvpp2 driver to the new API, so that the
ndo_eth_ioctl() path can be removed completely.

Note that on the !port->hwtstamp condition, the old code used to fall
through in mvpp2_ioctl(), and return either -ENOTSUPP if !port->phylink,
or -EOPNOTSUPP, in phylink_mii_ioctl(). Keep the test for port->hwtstamp
in the newly introduced net_device_ops, but consolidate the error code
to just -EOPNOTSUPP. The other one is documented as NFS-specific, it's
best to avoid it anyway.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
Only compile-tested.

 .../net/ethernet/marvell/mvpp2/mvpp2_main.c   | 58 ++++++++-----------
 1 file changed, 23 insertions(+), 35 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 416a926a8281..a7872d14a49d 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -5173,38 +5173,40 @@ mvpp2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
 	stats->tx_dropped	= dev->stats.tx_dropped;
 }
 
-static int mvpp2_set_ts_config(struct mvpp2_port *port, struct ifreq *ifr)
+static int mvpp2_hwtstamp_set(struct net_device *dev,
+			      struct kernel_hwtstamp_config *config,
+			      struct netlink_ext_ack *extack)
 {
-	struct hwtstamp_config config;
+	struct mvpp2_port *port = netdev_priv(dev);
 	void __iomem *ptp;
 	u32 gcr, int_mask;
 
-	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
-		return -EFAULT;
+	if (!port->hwtstamp)
+		return -EOPNOTSUPP;
 
-	if (config.tx_type != HWTSTAMP_TX_OFF &&
-	    config.tx_type != HWTSTAMP_TX_ON)
+	if (config->tx_type != HWTSTAMP_TX_OFF &&
+	    config->tx_type != HWTSTAMP_TX_ON)
 		return -ERANGE;
 
 	ptp = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id);
 
 	int_mask = gcr = 0;
-	if (config.tx_type != HWTSTAMP_TX_OFF) {
+	if (config->tx_type != HWTSTAMP_TX_OFF) {
 		gcr |= MVPP22_PTP_GCR_TSU_ENABLE | MVPP22_PTP_GCR_TX_RESET;
 		int_mask |= MVPP22_PTP_INT_MASK_QUEUE1 |
 			    MVPP22_PTP_INT_MASK_QUEUE0;
 	}
 
 	/* It seems we must also release the TX reset when enabling the TSU */
-	if (config.rx_filter != HWTSTAMP_FILTER_NONE)
+	if (config->rx_filter != HWTSTAMP_FILTER_NONE)
 		gcr |= MVPP22_PTP_GCR_TSU_ENABLE | MVPP22_PTP_GCR_RX_RESET |
 		       MVPP22_PTP_GCR_TX_RESET;
 
 	if (gcr & MVPP22_PTP_GCR_TSU_ENABLE)
 		mvpp22_tai_start(port->priv->tai);
 
-	if (config.rx_filter != HWTSTAMP_FILTER_NONE) {
-		config.rx_filter = HWTSTAMP_FILTER_ALL;
+	if (config->rx_filter != HWTSTAMP_FILTER_NONE) {
+		config->rx_filter = HWTSTAMP_FILTER_ALL;
 		mvpp2_modify(ptp + MVPP22_PTP_GCR,
 			     MVPP22_PTP_GCR_RX_RESET |
 			     MVPP22_PTP_GCR_TX_RESET |
@@ -5225,26 +5227,22 @@ static int mvpp2_set_ts_config(struct mvpp2_port *port, struct ifreq *ifr)
 	if (!(gcr & MVPP22_PTP_GCR_TSU_ENABLE))
 		mvpp22_tai_stop(port->priv->tai);
 
-	port->tx_hwtstamp_type = config.tx_type;
-
-	if (copy_to_user(ifr->ifr_data, &config, sizeof(config)))
-		return -EFAULT;
+	port->tx_hwtstamp_type = config->tx_type;
 
 	return 0;
 }
 
-static int mvpp2_get_ts_config(struct mvpp2_port *port, struct ifreq *ifr)
+static int mvpp2_hwtstamp_get(struct net_device *dev,
+			      struct kernel_hwtstamp_config *config)
 {
-	struct hwtstamp_config config;
-
-	memset(&config, 0, sizeof(config));
+	struct mvpp2_port *port = netdev_priv(dev);
 
-	config.tx_type = port->tx_hwtstamp_type;
-	config.rx_filter = port->rx_hwtstamp ?
-		HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
+	if (!port->hwtstamp)
+		return -EOPNOTSUPP;
 
-	if (copy_to_user(ifr->ifr_data, &config, sizeof(config)))
-		return -EFAULT;
+	config->tx_type = port->tx_hwtstamp_type;
+	config->rx_filter = port->rx_hwtstamp ? HWTSTAMP_FILTER_ALL :
+			    HWTSTAMP_FILTER_NONE;
 
 	return 0;
 }
@@ -5274,18 +5272,6 @@ static int mvpp2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
 	struct mvpp2_port *port = netdev_priv(dev);
 
-	switch (cmd) {
-	case SIOCSHWTSTAMP:
-		if (port->hwtstamp)
-			return mvpp2_set_ts_config(port, ifr);
-		break;
-
-	case SIOCGHWTSTAMP:
-		if (port->hwtstamp)
-			return mvpp2_get_ts_config(port, ifr);
-		break;
-	}
-
 	if (!port->phylink)
 		return -ENOTSUPP;
 
@@ -5799,6 +5785,8 @@ static const struct net_device_ops mvpp2_netdev_ops = {
 	.ndo_set_features	= mvpp2_set_features,
 	.ndo_bpf		= mvpp2_xdp,
 	.ndo_xdp_xmit		= mvpp2_xdp_xmit,
+	.ndo_hwtstamp_get	= mvpp2_hwtstamp_get,
+	.ndo_hwtstamp_set	= mvpp2_hwtstamp_set,
 };
 
 static const struct ethtool_ops mvpp2_eth_tool_ops = {
-- 
2.43.0