enetc: add get_ts_info interface for ethtool

This patch is to add get_ts_info interface for ethtool
to support getting timestamping capability.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/enetc/enetc.h

@@ -209,6 +209,9 @@ struct enetc_msg_cmd_set_primary_mac {
 
 #define ENETC_CBDR_TIMEOUT	1000 /* usecs */
 
+/* PTP driver exports */
+extern int enetc_phc_index;
+
 /* SI common */
 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv);
 void enetc_pci_remove(struct pci_dev *pdev);

drivers/net/ethernet/freescale/enetc/enetc_ethtool.c

@@ -555,6 +555,35 @@ static void enetc_get_ringparam(struct net_device *ndev,
 	}
 }
 
+static int enetc_get_ts_info(struct net_device *ndev,
+			     struct ethtool_ts_info *info)
+{
+	int *phc_idx;
+
+	phc_idx = symbol_get(enetc_phc_index);
+	if (phc_idx) {
+		info->phc_index = *phc_idx;
+		symbol_put(enetc_phc_index);
+	} else {
+		info->phc_index = -1;
+	}
+
+#ifdef CONFIG_FSL_ENETC_HW_TIMESTAMPING
+	info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
+				SOF_TIMESTAMPING_RX_HARDWARE |
+				SOF_TIMESTAMPING_RAW_HARDWARE;
+
+	info->tx_types = (1 << HWTSTAMP_TX_OFF) |
+			 (1 << HWTSTAMP_TX_ON);
+	info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
+			   (1 << HWTSTAMP_FILTER_ALL);
+#else
+	info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
+				SOF_TIMESTAMPING_SOFTWARE;
+#endif
+	return 0;
+}
+
 static const struct ethtool_ops enetc_pf_ethtool_ops = {
 	.get_regs_len = enetc_get_reglen,
 	.get_regs = enetc_get_regs,
@@ -571,6 +600,7 @@ static const struct ethtool_ops enetc_pf_ethtool_ops = {
 	.get_link_ksettings = phy_ethtool_get_link_ksettings,
 	.set_link_ksettings = phy_ethtool_set_link_ksettings,
 	.get_link = ethtool_op_get_link,
+	.get_ts_info = enetc_get_ts_info,
 };
 
 static const struct ethtool_ops enetc_vf_ethtool_ops = {
@@ -586,6 +616,7 @@ static const struct ethtool_ops enetc_vf_ethtool_ops = {
 	.set_rxfh = enetc_set_rxfh,
 	.get_ringparam = enetc_get_ringparam,
 	.get_link = ethtool_op_get_link,
+	.get_ts_info = enetc_get_ts_info,
 };
 
 void enetc_set_ethtool_ops(struct net_device *ndev)

drivers/net/ethernet/freescale/enetc/enetc_ptp.c

@@ -7,6 +7,9 @@
 
 #include "enetc.h"
 
+int enetc_phc_index = -1;
+EXPORT_SYMBOL(enetc_phc_index);
+
 static struct ptp_clock_info enetc_ptp_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "ENETC PTP clock",
@@ -96,6 +99,7 @@ static int enetc_ptp_probe(struct pci_dev *pdev,
 	if (err)
 		goto err_no_clock;
 
+	enetc_phc_index = ptp_qoriq->phc_index;
 	pci_set_drvdata(pdev, ptp_qoriq);
 
 	return 0;
@@ -119,6 +123,7 @@ static void enetc_ptp_remove(struct pci_dev *pdev)
 {
 	struct ptp_qoriq *ptp_qoriq = pci_get_drvdata(pdev);
 
+	enetc_phc_index = -1;
 	ptp_qoriq_free(ptp_qoriq);
 	kfree(ptp_qoriq);