[PATCH net-next v2 3/7] net: liquidio_vf: convert to use ndo_hwtstamp callbacks

[Vadim Fedorenko <vadim.fedorenko@linux.dev>]

The driver implemented SIOCSHWTSTAMP ioctl command only, but there is a
way to get configuration back. Implement both ndo_hwtstamp_set and
ndo_hwtstamp_set callbacks.

Reviewed-by: Kory Maincent <kory.maincent@bootlin.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
---
 .../ethernet/cavium/liquidio/lio_vf_main.c    | 48 ++++++++-----------
 1 file changed, 19 insertions(+), 29 deletions(-)

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index 3230dff5ba05..e02942dbbcce 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -1236,20 +1236,13 @@ liquidio_get_stats64(struct net_device *netdev,
 		lstats->tx_carrier_errors;
 }
 
-/**
- * hwtstamp_ioctl - Handler for SIOCSHWTSTAMP ioctl
- * @netdev: network device
- * @ifr: interface request
- */
-static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
+static int liquidio_hwtstamp_set(struct net_device *netdev,
+				 struct kernel_hwtstamp_config *conf,
+				 struct netlink_ext_ack *extack)
 {
 	struct lio *lio = GET_LIO(netdev);
-	struct hwtstamp_config conf;
-
-	if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
-		return -EFAULT;
 
-	switch (conf.tx_type) {
+	switch (conf->tx_type) {
 	case HWTSTAMP_TX_ON:
 	case HWTSTAMP_TX_OFF:
 		break;
@@ -1257,7 +1250,7 @@ static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
 		return -ERANGE;
 	}
 
-	switch (conf.rx_filter) {
+	switch (conf->rx_filter) {
 	case HWTSTAMP_FILTER_NONE:
 		break;
 	case HWTSTAMP_FILTER_ALL:
@@ -1275,35 +1268,31 @@ static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
 	case HWTSTAMP_FILTER_PTP_V2_SYNC:
 	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
 	case HWTSTAMP_FILTER_NTP_ALL:
-		conf.rx_filter = HWTSTAMP_FILTER_ALL;
+		conf->rx_filter = HWTSTAMP_FILTER_ALL;
 		break;
 	default:
 		return -ERANGE;
 	}
 
-	if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
+	if (conf->rx_filter == HWTSTAMP_FILTER_ALL)
 		ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
 
 	else
 		ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
 
-	return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
+	return 0;
 }
 
-/**
- * liquidio_ioctl - ioctl handler
- * @netdev: network device
- * @ifr: interface request
- * @cmd: command
- */
-static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+static int liquidio_hwtstamp_get(struct net_device *netdev,
+				 struct kernel_hwtstamp_config *conf)
 {
-	switch (cmd) {
-	case SIOCSHWTSTAMP:
-		return hwtstamp_ioctl(netdev, ifr);
-	default:
-		return -EOPNOTSUPP;
-	}
+	struct lio *lio = GET_LIO(netdev);
+
+	/* TX timestamping is techically always on */
+	conf->tx_type = HWTSTAMP_TX_ON;
+	conf->rx_filter = ifstate_check(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED) ?
+			  HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
+	return 0;
 }
 
 static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
@@ -1881,9 +1870,10 @@ static const struct net_device_ops lionetdevops = {
 	.ndo_vlan_rx_add_vid    = liquidio_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid   = liquidio_vlan_rx_kill_vid,
 	.ndo_change_mtu		= liquidio_change_mtu,
-	.ndo_eth_ioctl		= liquidio_ioctl,
 	.ndo_fix_features	= liquidio_fix_features,
 	.ndo_set_features	= liquidio_set_features,
+	.ndo_hwtstamp_get	= liquidio_hwtstamp_get,
+	.ndo_hwtstamp_set	= liquidio_hwtstamp_set,
 };
 
 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
-- 
2.47.3