[PATCH net-next 0/3] Convert Broadcom SF2 to mac_link_up() resolved state

[PATCH net-next 0/3] Convert Broadcom SF2 to mac_link_up() resolved state

[Russell King - ARM Linux admin]

Convert Broadcom SF2 DSA support to use the newly provided resolved
link state via mac_link_up() rather than using the state in
mac_config().

 drivers/net/dsa/bcm_sf2.c | 90 +++++++++++++++++++++++++++++------------------
 1 file changed, 56 insertions(+), 34 deletions(-)

-- 
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[PATCH net-next 1/3] net: dsa/bcm_sf2: fix incorrect usage of state->link

[Russell King]

state->link has never been valid in mac_config() implementations -
while it may be correct in some calls, it is not true that it can be
relied upon.

Fix bcm_sf2 to use the correct method of handling forced link status.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/net/dsa/bcm_sf2.c | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 946e41f020a5..5a8759d2de6c 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -618,8 +618,6 @@ static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port,
 		break;
 	}
 
-	if (state->link)
-		reg |= LINK_STS;
 	if (state->duplex == DUPLEX_FULL)
 		reg |= DUPLX_MODE;
 
@@ -650,6 +648,20 @@ static void bcm_sf2_sw_mac_link_down(struct dsa_switch *ds, int port,
 				     unsigned int mode,
 				     phy_interface_t interface)
 {
+	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
+	u32 reg, offset;
+
+	if (port != core_readl(priv, CORE_IMP0_PRT_ID)) {
+		if (priv->type == BCM7445_DEVICE_ID)
+			offset = CORE_STS_OVERRIDE_GMIIP_PORT(port);
+		else
+			offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port);
+
+		reg = core_readl(priv, offset);
+		reg &= ~LINK_STS;
+		core_writel(priv, reg, offset);
+	}
+
 	bcm_sf2_sw_mac_link_set(ds, port, interface, false);
 }
 
@@ -662,9 +674,21 @@ static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port,
 {
 	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 	struct ethtool_eee *p = &priv->dev->ports[port].eee;
+	u32 reg, offset;
 
 	bcm_sf2_sw_mac_link_set(ds, port, interface, true);
 
+	if (port != core_readl(priv, CORE_IMP0_PRT_ID)) {
+		if (priv->type == BCM7445_DEVICE_ID)
+			offset = CORE_STS_OVERRIDE_GMIIP_PORT(port);
+		else
+			offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port);
+
+		reg = core_readl(priv, offset);
+		reg |= LINK_STS;
+		core_writel(priv, reg, offset);
+	}
+
 	if (mode == MLO_AN_PHY && phydev)
 		p->eee_enabled = b53_eee_init(ds, port, phydev);
 }
-- 
2.20.1

[PATCH net-next 2/3] net: dsa/bcm_sf2: move speed/duplex forcing to mac_link_up()

[Russell King]

Convert the bcm_sf2 to use the finalised speed and duplex in its
mac_link_up() call rather than the parameters in mac_config().

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/net/dsa/bcm_sf2.c | 43 +++++++++++++++------------------------
 1 file changed, 16 insertions(+), 27 deletions(-)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 5a8759d2de6c..062e6efad53f 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -558,16 +558,11 @@ static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port,
 {
 	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 	u32 id_mode_dis = 0, port_mode;
-	u32 reg, offset;
+	u32 reg;
 
 	if (port == core_readl(priv, CORE_IMP0_PRT_ID))
 		return;
 
-	if (priv->type == BCM7445_DEVICE_ID)
-		offset = CORE_STS_OVERRIDE_GMIIP_PORT(port);
-	else
-		offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port);
-
 	switch (state->interface) {
 	case PHY_INTERFACE_MODE_RGMII:
 		id_mode_dis = 1;
@@ -582,8 +577,8 @@ static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port,
 		port_mode = EXT_REVMII;
 		break;
 	default:
-		/* all other PHYs: internal and MoCA */
-		goto force_link;
+		/* Nothing required for all other PHYs: internal and MoCA */
+		return;
 	}
 
 	/* Clear id_mode_dis bit, and the existing port mode, let
@@ -605,23 +600,6 @@ static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port,
 	}
 
 	reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
-
-force_link:
-	/* Force link settings detected from the PHY */
-	reg = SW_OVERRIDE;
-	switch (state->speed) {
-	case SPEED_1000:
-		reg |= SPDSTS_1000 << SPEED_SHIFT;
-		break;
-	case SPEED_100:
-		reg |= SPDSTS_100 << SPEED_SHIFT;
-		break;
-	}
-
-	if (state->duplex == DUPLEX_FULL)
-		reg |= DUPLX_MODE;
-
-	core_writel(priv, reg, offset);
 }
 
 static void bcm_sf2_sw_mac_link_set(struct dsa_switch *ds, int port,
@@ -684,8 +662,19 @@ static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port,
 		else
 			offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port);
 
-		reg = core_readl(priv, offset);
-		reg |= LINK_STS;
+		reg = SW_OVERRIDE | LINK_STS;
+		switch (speed) {
+		case SPEED_1000:
+			reg |= SPDSTS_1000 << SPEED_SHIFT;
+			break;
+		case SPEED_100:
+			reg |= SPDSTS_100 << SPEED_SHIFT;
+			break;
+		}
+
+		if (duplex == DUPLEX_FULL)
+			reg |= DUPLX_MODE;
+
 		core_writel(priv, reg, offset);
 	}
 
-- 
2.20.1

[PATCH net-next 3/3] net: dsa/bcm_sf2: move pause mode setting into mac_link_up()

[Russell King]

bcm_sf2 only appears to support pause modes on RGMII interfaces (the
enable bits are in the RGMII control register.)  Setup the pause modes
for RGMII connections.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/net/dsa/bcm_sf2.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 062e6efad53f..45e4d40d7e25 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -587,18 +587,11 @@ static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port,
 	reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
 	reg &= ~ID_MODE_DIS;
 	reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT);
-	reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
 
 	reg |= port_mode;
 	if (id_mode_dis)
 		reg |= ID_MODE_DIS;
 
-	if (state->pause & MLO_PAUSE_TXRX_MASK) {
-		if (state->pause & MLO_PAUSE_TX)
-			reg |= TX_PAUSE_EN;
-		reg |= RX_PAUSE_EN;
-	}
-
 	reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
 }
 
@@ -662,6 +655,22 @@ static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port,
 		else
 			offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port);
 
+		if (interface == PHY_INTERFACE_MODE_RGMII ||
+		    interface == PHY_INTERFACE_MODE_RGMII_TXID ||
+		    interface == PHY_INTERFACE_MODE_MII ||
+		    interface == PHY_INTERFACE_MODE_REVMII) {
+			reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
+			reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
+
+			if (tx_pause)
+				reg |= TX_PAUSE_EN;
+			if (rx_pause)
+				reg |= RX_PAUSE_EN;
+
+			reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
+		}
+
+
 		reg = SW_OVERRIDE | LINK_STS;
 		switch (speed) {
 		case SPEED_1000:
-- 
2.20.1

Re: [PATCH net-next 3/3] net: dsa/bcm_sf2: move pause mode setting into mac_link_up()

[Jakub Kicinski]

On Tue, 30 Jun 2020 11:28:18 +0100 Russell King wrote:
> @@ -662,6 +655,22 @@ static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port,
>  		else
>  			offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port);
>  
> +		if (interface == PHY_INTERFACE_MODE_RGMII ||
> +		    interface == PHY_INTERFACE_MODE_RGMII_TXID ||
> +		    interface == PHY_INTERFACE_MODE_MII ||
> +		    interface == PHY_INTERFACE_MODE_REVMII) {
> +			reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
> +			reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
> +
> +			if (tx_pause)
> +				reg |= TX_PAUSE_EN;
> +			if (rx_pause)
> +				reg |= RX_PAUSE_EN;
> +
> +			reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
> +		}
> +
> +

nit: double new line

Re: [PATCH net-next 0/3] Convert Broadcom SF2 to mac_link_up() resolved state

[David Miller]

From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Date: Tue, 30 Jun 2020 11:27:51 +0100

> Convert Broadcom SF2 DSA support to use the newly provided resolved
> link state via mac_link_up() rather than using the state in
> mac_config().

Series applied with double newline in patch #3 fixed up.

Re: [PATCH net-next 0/3] Convert Broadcom SF2 to mac_link_up() resolved state

[Russell King - ARM Linux admin]

On Tue, Jun 30, 2020 at 01:05:32PM -0700, David Miller wrote:
> From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
> Date: Tue, 30 Jun 2020 11:27:51 +0100
> 
> > Convert Broadcom SF2 DSA support to use the newly provided resolved
> > link state via mac_link_up() rather than using the state in
> > mac_config().
> 
> Series applied with double newline in patch #3 fixed up.

Thanks David, I was going to send a series with that fixed up tomorrow.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!