[PATCH] net: dsa: bcm_sf2: use 2 Gbps IMP port link on BCM4908

[PATCH] net: dsa: bcm_sf2: use 2 Gbps IMP port link on BCM4908

[Rafał Miłecki]

From: Rafał Miłecki <rafal@milecki.pl>

BCM4908 uses 2 Gbps link between switch and the Ethernet interface.
Without this BCM4908 devices were able to achieve only 2 x ~895 Mb/s.
This allows handling e.g. NAT traffic with 940 Mb/s.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
 drivers/net/dsa/bcm_sf2.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 7583fc12a9d7..d183206c4bb4 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -114,7 +114,10 @@ static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
 		/* Force link status for IMP port */
 		reg = core_readl(priv, offset);
 		reg |= (MII_SW_OR | LINK_STS);
-		reg &= ~GMII_SPEED_UP_2G;
+		if (priv->type == BCM4908_DEVICE_ID)
+			reg |= GMII_SPEED_UP_2G;
+		else
+			reg &= ~GMII_SPEED_UP_2G;
 		core_writel(priv, reg, offset);
 
 		/* Enable Broadcast, Multicast, Unicast forwarding to IMP port */
-- 
2.26.2

Re: [PATCH] net: dsa: bcm_sf2: use 2 Gbps IMP port link on BCM4908

[Florian Fainelli]

On 3/10/21 4:51 AM, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> BCM4908 uses 2 Gbps link between switch and the Ethernet interface.
> Without this BCM4908 devices were able to achieve only 2 x ~895 Mb/s.
> This allows handling e.g. NAT traffic with 940 Mb/s.
> 
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

Acked-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

Re: [PATCH] net: dsa: bcm_sf2: use 2 Gbps IMP port link on BCM4908

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Wed, 10 Mar 2021 13:51:59 +0100 you wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> BCM4908 uses 2 Gbps link between switch and the Ethernet interface.
> Without this BCM4908 devices were able to achieve only 2 x ~895 Mb/s.
> This allows handling e.g. NAT traffic with 940 Mb/s.
> 
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
> 
> [...]

Here is the summary with links:
  - net: dsa: bcm_sf2: use 2 Gbps IMP port link on BCM4908
    https://git.kernel.org/netdev/net/c/8373a0fe9c71

You are awesome, thank you!
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