net: sparx5: Implement SIOCSHWTSTAMP and SIOCGHWTSTAMP

Implement the ioctl callbacks SIOCSHWTSTAMP and SIOCGHWTSTAMP to allow
to configure the ports to enable/disable timestamping for TX. The RX
timestamping is always enabled. The HW is capable to run both 1-step
timestamping and 2-step timestamping.
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/sparx5/sparx5_main.h

@@ -84,6 +84,10 @@ enum sparx5_vlan_port_type {
 #define SPARX5_PHC_COUNT		3
 #define SPARX5_PHC_PORT			0
 
+#define IFH_REW_OP_NOOP			0x0
+#define IFH_REW_OP_ONE_STEP_PTP		0x3
+#define IFH_REW_OP_TWO_STEP_PTP		0x4
+
 struct sparx5;
 
 struct sparx5_db_hw {
@@ -174,6 +178,8 @@ struct sparx5_port {
 	u32 custom_etype;
 	bool vlan_aware;
 	struct hrtimer inj_timer;
+	/* ptp */
+	u8 ptp_cmd;
 };
 
 enum sparx5_core_clockfreq {
@@ -242,6 +248,7 @@ struct sparx5 {
 	bool ptp;
 	struct sparx5_phc phc[SPARX5_PHC_COUNT];
 	spinlock_t ptp_clock_lock; /* lock for phc */
+	struct mutex ptp_lock; /* lock for ptp interface state */
 };
 
 /* sparx5_switchdev.c */
@@ -314,6 +321,8 @@ void sparx5_unregister_netdevs(struct sparx5 *sparx5);
 /* sparx5_ptp.c */
 int sparx5_ptp_init(struct sparx5 *sparx5);
 void sparx5_ptp_deinit(struct sparx5 *sparx5);
+int sparx5_ptp_hwtstamp_set(struct sparx5_port *port, struct ifreq *ifr);
+int sparx5_ptp_hwtstamp_get(struct sparx5_port *port, struct ifreq *ifr);
 
 /* Clock period in picoseconds */
 static inline u32 sparx5_clk_period(enum sparx5_core_clockfreq cclock)

drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c

@@ -179,6 +179,24 @@ static int sparx5_get_port_parent_id(struct net_device *dev,
 	return 0;
 }
 
+static int sparx5_port_ioctl(struct net_device *dev, struct ifreq *ifr,
+			     int cmd)
+{
+	struct sparx5_port *sparx5_port = netdev_priv(dev);
+	struct sparx5 *sparx5 = sparx5_port->sparx5;
+
+	if (!phy_has_hwtstamp(dev->phydev) && sparx5->ptp) {
+		switch (cmd) {
+		case SIOCSHWTSTAMP:
+			return sparx5_ptp_hwtstamp_set(sparx5_port, ifr);
+		case SIOCGHWTSTAMP:
+			return sparx5_ptp_hwtstamp_get(sparx5_port, ifr);
+		}
+	}
+
+	return phy_mii_ioctl(dev->phydev, ifr, cmd);
+}
+
 static const struct net_device_ops sparx5_port_netdev_ops = {
 	.ndo_open               = sparx5_port_open,
 	.ndo_stop               = sparx5_port_stop,
@@ -189,6 +207,7 @@ static const struct net_device_ops sparx5_port_netdev_ops = {
 	.ndo_validate_addr      = eth_validate_addr,
 	.ndo_get_stats64        = sparx5_get_stats64,
 	.ndo_get_port_parent_id = sparx5_get_port_parent_id,
+	.ndo_eth_ioctl          = sparx5_port_ioctl,
 };
 
 bool sparx5_netdevice_check(const struct net_device *dev)

drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c

@@ -74,6 +74,79 @@ static u64 sparx5_ptp_get_nominal_value(struct sparx5 *sparx5)
 	return res;
 }
 
+int sparx5_ptp_hwtstamp_set(struct sparx5_port *port, struct ifreq *ifr)
+{
+	struct sparx5 *sparx5 = port->sparx5;
+	struct hwtstamp_config cfg;
+	struct sparx5_phc *phc;
+
+	/* For now don't allow to run ptp on ports that are part of a bridge,
+	 * because in case of transparent clock the HW will still forward the
+	 * frames, so there would be duplicate frames
+	 */
+
+	if (test_bit(port->portno, sparx5->bridge_mask))
+		return -EINVAL;
+
+	if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
+		return -EFAULT;
+
+	switch (cfg.tx_type) {
+	case HWTSTAMP_TX_ON:
+		port->ptp_cmd = IFH_REW_OP_TWO_STEP_PTP;
+		break;
+	case HWTSTAMP_TX_ONESTEP_SYNC:
+		port->ptp_cmd = IFH_REW_OP_ONE_STEP_PTP;
+		break;
+	case HWTSTAMP_TX_OFF:
+		port->ptp_cmd = IFH_REW_OP_NOOP;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	switch (cfg.rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		break;
+	case HWTSTAMP_FILTER_ALL:
+	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+	case HWTSTAMP_FILTER_NTP_ALL:
+		cfg.rx_filter = HWTSTAMP_FILTER_ALL;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	/* Commit back the result & save it */
+	mutex_lock(&sparx5->ptp_lock);
+	phc = &sparx5->phc[SPARX5_PHC_PORT];
+	memcpy(&phc->hwtstamp_config, &cfg, sizeof(cfg));
+	mutex_unlock(&sparx5->ptp_lock);
+
+	return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+}
+
+int sparx5_ptp_hwtstamp_get(struct sparx5_port *port, struct ifreq *ifr)
+{
+	struct sparx5 *sparx5 = port->sparx5;
+	struct sparx5_phc *phc;
+
+	phc = &sparx5->phc[SPARX5_PHC_PORT];
+	return copy_to_user(ifr->ifr_data, &phc->hwtstamp_config,
+			    sizeof(phc->hwtstamp_config)) ? -EFAULT : 0;
+}
+
 static int sparx5_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
 {
 	struct sparx5_phc *phc = container_of(ptp, struct sparx5_phc, info);
@@ -291,6 +364,7 @@ int sparx5_ptp_init(struct sparx5 *sparx5)
 	}
 
 	spin_lock_init(&sparx5->ptp_clock_lock);
+	mutex_init(&sparx5->ptp_lock);
 
 	/* Disable master counters */
 	spx5_wr(PTP_PTP_DOM_CFG_PTP_ENA_SET(0), sparx5, PTP_PTP_DOM_CFG);