netdev - [PATCH net-next v9 7/7] net: fec: Fixup EEE

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Date: Sat,  2 Mar 2024 20:53:06 +0100
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Wei Fang <wei.fang@....com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>,
	kernel@...gutronix.de,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	Shenwei Wang <shenwei.wang@....com>,
	Clark Wang <xiaoning.wang@....com>,
	NXP Linux Team <linux-imx@....com>
Subject: [PATCH net-next v9 7/7] net: fec: Fixup EEE

From: Andrew Lunn <andrew@...n.ch>

The enabling/disabling of EEE in the MAC should happen as a result of
auto negotiation. So move the enable/disable into
fec_enet_adjust_link() which gets called by phylib when there is a
change in link status.

fec_enet_set_eee() now just stores away the LPI timer value.
Everything else is passed to phylib, so it can correctly setup the
PHY.

fec_enet_get_eee() relies on phylib doing most of the work,
the MAC driver just adds the LPI timer value.

Call phy_support_eee() if the quirk is present to indicate the MAC
actually supports EEE.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
Tested-by: Oleksij Rempel <o.rempel@...gutronix.de> (On iMX8MP debix)
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
Reviewed-by: Wei Fang <wei.fang@....com>
---
v2: Only call fec_enet_eee_mode_set for those that support EEE
v7: update against kernel v6.8-rc4
---
 drivers/net/ethernet/freescale/fec_main.c | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index a2c786550342f..d7693fdf640d5 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2033,13 +2033,8 @@ static int fec_enet_eee_mode_set(struct net_device *ndev, bool enable)
 	struct fec_enet_private *fep = netdev_priv(ndev);
 	struct ethtool_keee *p = &fep->eee;
 	unsigned int sleep_cycle, wake_cycle;
-	int ret = 0;
 
 	if (enable) {
-		ret = phy_init_eee(ndev->phydev, false);
-		if (ret)
-			return ret;
-
 		sleep_cycle = fec_enet_us_to_tx_cycle(ndev, p->tx_lpi_timer);
 		wake_cycle = sleep_cycle;
 	} else {
@@ -2047,8 +2042,6 @@ static int fec_enet_eee_mode_set(struct net_device *ndev, bool enable)
 		wake_cycle = 0;
 	}
 
-	p->tx_lpi_enabled = enable;
-
 	writel(sleep_cycle, fep->hwp + FEC_LPI_SLEEP);
 	writel(wake_cycle, fep->hwp + FEC_LPI_WAKE);
 
@@ -2094,6 +2087,8 @@ static void fec_enet_adjust_link(struct net_device *ndev)
 			netif_tx_unlock_bh(ndev);
 			napi_enable(&fep->napi);
 		}
+		if (fep->quirks & FEC_QUIRK_HAS_EEE)
+			fec_enet_eee_mode_set(ndev, phy_dev->enable_tx_lpi);
 	} else {
 		if (fep->link) {
 			netif_stop_queue(ndev);
@@ -2453,6 +2448,9 @@ static int fec_enet_mii_probe(struct net_device *ndev)
 	else
 		phy_set_max_speed(phy_dev, 100);
 
+	if (fep->quirks & FEC_QUIRK_HAS_EEE)
+		phy_support_eee(phy_dev);
+
 	fep->link = 0;
 	fep->full_duplex = 0;
 
@@ -3172,7 +3170,6 @@ fec_enet_get_eee(struct net_device *ndev, struct ethtool_keee *edata)
 		return -ENETDOWN;
 
 	edata->tx_lpi_timer = p->tx_lpi_timer;
-	edata->tx_lpi_enabled = p->tx_lpi_enabled;
 
 	return phy_ethtool_get_eee(ndev->phydev, edata);
 }
@@ -3182,7 +3179,6 @@ fec_enet_set_eee(struct net_device *ndev, struct ethtool_keee *edata)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
 	struct ethtool_keee *p = &fep->eee;
-	int ret = 0;
 
 	if (!(fep->quirks & FEC_QUIRK_HAS_EEE))
 		return -EOPNOTSUPP;
@@ -3192,15 +3188,6 @@ fec_enet_set_eee(struct net_device *ndev, struct ethtool_keee *edata)
 
 	p->tx_lpi_timer = edata->tx_lpi_timer;
 
-	if (!edata->eee_enabled || !edata->tx_lpi_enabled ||
-	    !edata->tx_lpi_timer)
-		ret = fec_enet_eee_mode_set(ndev, false);
-	else
-		ret = fec_enet_eee_mode_set(ndev, true);
-
-	if (ret)
-		return ret;
-
 	return phy_ethtool_set_eee(ndev->phydev, edata);
 }
 
-- 
2.39.2