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Date:   Fri, 21 Oct 2022 11:26:41 +0530
From:   Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
To:     <netdev@...r.kernel.org>
CC:     <davem@...emloft.net>, <kuba@...nel.org>,
        <linux-kernel@...r.kernel.org>, <bryan.whitehead@...rochip.com>,
        <hkallweit1@...il.com>, <pabeni@...hat.com>, <edumazet@...gle.com>,
        <linux@...linux.org.uk>, <UNGLinuxDriver@...rochip.com>,
        <andrew@...n.ch>, <Ian.Saturley@...rochip.com>
Subject: [PATCH net-next 1/2] net: lan743x: Add support for get_pauseparam and set_pauseparam

Add pause get and set functions

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
---
 .../net/ethernet/microchip/lan743x_ethtool.c  | 46 +++++++++++++++++++
 drivers/net/ethernet/microchip/lan743x_main.c |  4 +-
 drivers/net/ethernet/microchip/lan743x_main.h |  2 +
 3 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c b/drivers/net/ethernet/microchip/lan743x_ethtool.c
index c739d60ee17d..44c98715eb17 100644
--- a/drivers/net/ethernet/microchip/lan743x_ethtool.c
+++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c
@@ -1233,6 +1233,50 @@ static void lan743x_get_regs(struct net_device *dev,
 	lan743x_common_regs(dev, regs, p);
 }
 
+static void lan743x_get_pauseparam(struct net_device *dev,
+				   struct ethtool_pauseparam *pause)
+{
+	struct lan743x_adapter *adapter = netdev_priv(dev);
+	struct lan743x_phy *phy = &adapter->phy;
+
+	if (phy->fc_request_control & FLOW_CTRL_TX)
+		pause->tx_pause = 1;
+	if (phy->fc_request_control & FLOW_CTRL_RX)
+		pause->rx_pause = 1;
+	pause->autoneg = phy->fc_autoneg;
+}
+
+static int lan743x_set_pauseparam(struct net_device *dev,
+				  struct ethtool_pauseparam *pause)
+{
+	struct lan743x_adapter *adapter = netdev_priv(dev);
+	struct phy_device *phydev = dev->phydev;
+	struct lan743x_phy *phy = &adapter->phy;
+
+	if (!phydev)
+		return -ENODEV;
+
+	if (!phy_validate_pause(phydev, pause))
+		return -EINVAL;
+
+	phy->fc_request_control = 0;
+	if (pause->rx_pause)
+		phy->fc_request_control |= FLOW_CTRL_RX;
+
+	if (pause->tx_pause)
+		phy->fc_request_control |= FLOW_CTRL_TX;
+
+	phy->fc_autoneg = pause->autoneg;
+
+	phy_set_asym_pause(phydev, pause->rx_pause,  pause->tx_pause);
+
+	if (pause->autoneg == AUTONEG_DISABLE)
+		lan743x_mac_flow_ctrl_set_enables(adapter, pause->tx_pause,
+						  pause->rx_pause);
+
+	return 0;
+}
+
 const struct ethtool_ops lan743x_ethtool_ops = {
 	.get_drvinfo = lan743x_ethtool_get_drvinfo,
 	.get_msglevel = lan743x_ethtool_get_msglevel,
@@ -1259,6 +1303,8 @@ const struct ethtool_ops lan743x_ethtool_ops = {
 	.set_link_ksettings = phy_ethtool_set_link_ksettings,
 	.get_regs_len = lan743x_get_regs_len,
 	.get_regs = lan743x_get_regs,
+	.get_pauseparam = lan743x_get_pauseparam,
+	.set_pauseparam = lan743x_set_pauseparam,
 #ifdef CONFIG_PM
 	.get_wol = lan743x_ethtool_get_wol,
 	.set_wol = lan743x_ethtool_set_wol,
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index 50eeecba1f18..c0f8ba601c01 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -1326,8 +1326,8 @@ static void lan743x_mac_close(struct lan743x_adapter *adapter)
 				 1, 1000, 20000, 100);
 }
 
-static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
-					      bool tx_enable, bool rx_enable)
+void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
+				       bool tx_enable, bool rx_enable)
 {
 	u32 flow_setting = 0;
 
diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h
index 67877d3b6dd9..bc5eea4c7b40 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.h
+++ b/drivers/net/ethernet/microchip/lan743x_main.h
@@ -1159,5 +1159,7 @@ u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset);
 void lan743x_csr_write(struct lan743x_adapter *adapter, int offset, u32 data);
 int lan743x_hs_syslock_acquire(struct lan743x_adapter *adapter, u16 timeout);
 void lan743x_hs_syslock_release(struct lan743x_adapter *adapter);
+void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
+				       bool tx_enable, bool rx_enable);
 
 #endif /* _LAN743X_H */
-- 
2.25.1

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