This is a note to let you know that I've just added the patch titled
net: bcmgenet: Fix EEE implementation
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-bcmgenet-fix-eee-implementation.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a9f31047baca57d47440c879cf259b86f900260c Mon Sep 17 00:00:00 2001
From: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
Date: Tue, 6 Jun 2023 14:43:47 -0700
Subject: net: bcmgenet: Fix EEE implementation
From: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Reviewed-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230606214348.2408018-1-florian.fainelli@xxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
---
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
@@ -1018,7 +1018,8 @@ 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;
@@ -1038,7 +1039,7 @@ 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);
@@ -1059,6 +1060,7 @@ 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)
@@ -1074,6 +1076,7 @@ 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);
@@ -1083,7 +1086,6 @@ 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;
@@ -1094,16 +1096,11 @@ 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);
@@ -3688,9 +3685,6 @@ 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
@@ -736,4 +736,7 @@ 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
*/
@@ -96,6 +97,11 @@ void bcmgenet_mii_setup(struct net_devic
CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE);
reg |= cmd_bits;
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)
Patches currently in stable-queue which might be from florian.fainelli@xxxxxxxxxxxx are
queue-5.4/irqchip-irq-brcmstb-l2-add-write-memory-barrier-before-exit.patch
queue-5.4/net-bcmgenet-fix-eee-implementation.patch
queue-5.4/spi-bcm-qspi-fix-sfdp-bfpt-read-by-usig-mspi-read.patch
