target/linux/generic/backport-5.4/707-v5.7-0008-net-dsa-bcm_sf2-Disable-learning-for-ASP-port.patch

   1 From 8b6b208b69917d88bb3e087f8c9e61c6b05ed571 Mon Sep 17 00:00:00 2001
   2 From: Florian Fainelli <f.fainelli@gmail.com>
   3 Date: Mon, 30 Mar 2020 14:38:50 -0700
   4 Subject: [PATCH] net: dsa: bcm_sf2: Disable learning for ASP port
   5
   6 We don't want to enable learning for the ASP port since it only receives
   7 directed traffic, this allows us to bypass ARL-driven forwarding rules
   8 which could conflict with Broadcom tags and/or CFP forwarding.
   9
  10 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  11 Signed-off-by: David S. Miller <davem@davemloft.net>
  12 ---
  13  drivers/net/dsa/bcm_sf2.c | 10 +++++++++-
  14  1 file changed, 9 insertions(+), 1 deletion(-)
  15
  16 --- a/drivers/net/dsa/bcm_sf2.c
  17 +++ b/drivers/net/dsa/bcm_sf2.c
  18 @@ -173,9 +173,17 @@ static int bcm_sf2_port_setup(struct dsa
  19         core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
  20
  21         /* Enable Broadcom tags for that port if requested */
  22 -       if (priv->brcm_tag_mask & BIT(port))
  23 +       if (priv->brcm_tag_mask & BIT(port)) {
  24                 b53_brcm_hdr_setup(ds, port);
  25
  26 +               /* Disable learning on ASP port */
  27 +               if (port == 7) {
  28 +                       reg = core_readl(priv, CORE_DIS_LEARN);
  29 +                       reg |= BIT(port);
  30 +                       core_writel(priv, reg, CORE_DIS_LEARN);
  31 +               }
  32 +       }
  33 +
  34         /* Configure Traffic Class to QoS mapping, allow each priority to map
  35          * to a different queue number
  36          */