target/linux/bcm4908/patches-5.10/071-v5.12-0002-net-dsa-bcm_sf2-use-2-Gbps-IMP-port-link-on-BCM4908.patch

   1 From 8373a0fe9c7160a55482effa8a3f725efd3f8434 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
   3 Date: Wed, 10 Mar 2021 13:51:59 +0100
   4 Subject: [PATCH] net: dsa: bcm_sf2: use 2 Gbps IMP port link on BCM4908
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 BCM4908 uses 2 Gbps link between switch and the Ethernet interface.
  10 Without this BCM4908 devices were able to achieve only 2 x ~895 Mb/s.
  11 This allows handling e.g. NAT traffic with 940 Mb/s.
  12
  13 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  14 Acked-by: Florian Fainelli <f.fainelli@gmail.com>
  15 Signed-off-by: David S. Miller <davem@davemloft.net>
  16 ---
  17  drivers/net/dsa/bcm_sf2.c | 5 ++++-
  18  1 file changed, 4 insertions(+), 1 deletion(-)
  19
  20 --- a/drivers/net/dsa/bcm_sf2.c
  21 +++ b/drivers/net/dsa/bcm_sf2.c
  22 @@ -114,7 +114,10 @@ static void bcm_sf2_imp_setup(struct dsa
  23                 /* Force link status for IMP port */
  24                 reg = core_readl(priv, offset);
  25                 reg |= (MII_SW_OR | LINK_STS);
  26 -               reg &= ~GMII_SPEED_UP_2G;
  27 +               if (priv->type == BCM4908_DEVICE_ID)
  28 +                       reg |= GMII_SPEED_UP_2G;
  29 +               else
  30 +                       reg &= ~GMII_SPEED_UP_2G;
  31                 core_writel(priv, reg, offset);
  32
  33                 /* Enable Broadcast, Multicast, Unicast forwarding to IMP port */