5.15-stable review patch. If anyone has any objections, please let me know.
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From: Florian Fainelli florian.fainelli@broadcom.com
commit a9f31047baca57d47440c879cf259b86f900260c upstream.
We had a number of short comings:
- EEE must be re-evaluated whenever the state machine detects a link change as wight be switching from a link partner with EEE enabled/disabled
- tx_lpi_enabled controls whether EEE should be enabled/disabled for the transmit path, which applies to the TBUF block
- We do not need to forcibly enable EEE upon system resume, as the PHY state machine will trigger a link event that will do that, too
Fixes: 6ef398ea60d9 ("net: bcmgenet: add EEE support") Signed-off-by: Florian Fainelli florian.fainelli@broadcom.com Reviewed-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Link: https://lore.kernel.org/r/20230606214348.2408018-1-florian.fainelli@broadcom... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org ---
--- drivers/net/ethernet/broadcom/genet/bcmgenet.c | 22 ++++++++-------------- drivers/net/ethernet/broadcom/genet/bcmgenet.h | 3 +++ drivers/net/ethernet/broadcom/genet/bcmmii.c | 6 ++++++ 3 files changed, 17 insertions(+), 14 deletions(-)
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -1248,7 +1248,8 @@ static void bcmgenet_get_ethtool_stats(s } }
-static void bcmgenet_eee_enable_set(struct net_device *dev, bool enable) +void bcmgenet_eee_enable_set(struct net_device *dev, bool enable, + bool tx_lpi_enabled) { struct bcmgenet_priv *priv = netdev_priv(dev); u32 off = priv->hw_params->tbuf_offset + TBUF_ENERGY_CTRL; @@ -1268,7 +1269,7 @@ static void bcmgenet_eee_enable_set(stru
/* Enable EEE and switch to a 27Mhz clock automatically */ reg = bcmgenet_readl(priv->base + off); - if (enable) + if (tx_lpi_enabled) reg |= TBUF_EEE_EN | TBUF_PM_EN; else reg &= ~(TBUF_EEE_EN | TBUF_PM_EN); @@ -1289,6 +1290,7 @@ static void bcmgenet_eee_enable_set(stru
priv->eee.eee_enabled = enable; priv->eee.eee_active = enable; + priv->eee.tx_lpi_enabled = tx_lpi_enabled; }
static int bcmgenet_get_eee(struct net_device *dev, struct ethtool_eee *e) @@ -1304,6 +1306,7 @@ static int bcmgenet_get_eee(struct net_d
e->eee_enabled = p->eee_enabled; e->eee_active = p->eee_active; + e->tx_lpi_enabled = p->tx_lpi_enabled; e->tx_lpi_timer = bcmgenet_umac_readl(priv, UMAC_EEE_LPI_TIMER);
return phy_ethtool_get_eee(dev->phydev, e); @@ -1313,7 +1316,6 @@ static int bcmgenet_set_eee(struct net_d { struct bcmgenet_priv *priv = netdev_priv(dev); struct ethtool_eee *p = &priv->eee; - int ret = 0;
if (GENET_IS_V1(priv)) return -EOPNOTSUPP; @@ -1324,16 +1326,11 @@ static int bcmgenet_set_eee(struct net_d p->eee_enabled = e->eee_enabled;
if (!p->eee_enabled) { - bcmgenet_eee_enable_set(dev, false); + bcmgenet_eee_enable_set(dev, false, false); } else { - ret = phy_init_eee(dev->phydev, 0); - if (ret) { - netif_err(priv, hw, dev, "EEE initialization failed\n"); - return ret; - } - + p->eee_active = phy_init_eee(dev->phydev, false) >= 0; bcmgenet_umac_writel(priv, e->tx_lpi_timer, UMAC_EEE_LPI_TIMER); - bcmgenet_eee_enable_set(dev, true); + bcmgenet_eee_enable_set(dev, p->eee_active, e->tx_lpi_enabled); }
return phy_ethtool_set_eee(dev->phydev, e); @@ -4219,9 +4216,6 @@ static int bcmgenet_resume(struct device if (!device_may_wakeup(d)) phy_resume(dev->phydev);
- if (priv->eee.eee_enabled) - bcmgenet_eee_enable_set(dev, true); - bcmgenet_netif_start(dev);
netif_device_attach(dev); --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h @@ -701,4 +701,7 @@ int bcmgenet_wol_power_down_cfg(struct b void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv, enum bcmgenet_power_mode mode);
+void bcmgenet_eee_enable_set(struct net_device *dev, bool enable, + bool tx_lpi_enabled); + #endif /* __BCMGENET_H__ */ --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -25,6 +25,7 @@
#include "bcmgenet.h"
+ /* setup netdev link state when PHY link status change and * update UMAC and RGMII block when link up */ @@ -102,6 +103,11 @@ void bcmgenet_mii_setup(struct net_devic reg |= CMD_TX_EN | CMD_RX_EN; } bcmgenet_umac_writel(priv, reg, UMAC_CMD); + + priv->eee.eee_active = phy_init_eee(phydev, 0) >= 0; + bcmgenet_eee_enable_set(dev, + priv->eee.eee_enabled && priv->eee.eee_active, + priv->eee.tx_lpi_enabled); } else { /* done if nothing has changed */ if (!status_changed)