target/linux/generic/backport-5.15/774-v5.16-09-net-dsa-rtl8366rb-Support-fast-aging.patch

   1 From 8eb13420eb9ab4a4e2ebd612bf5dc9dba0039236 Mon Sep 17 00:00:00 2001
   2 From: Linus Walleij <linus.walleij@linaro.org>
   3 Date: Tue, 5 Oct 2021 21:47:03 +0200
   4 Subject: [PATCH 09/11] net: dsa: rtl8366rb: Support fast aging
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 This implements fast aging per-port using the special "security"
  10 register, which will flush any learned L2 LUT entries on a port.
  11
  12 The vendor API just enabled setting and clearing this bit, so
  13 we set it to age out any entries on the port and then we clear
  14 it again.
  15
  16 Suggested-by: Vladimir Oltean <olteanv@gmail.com>
  17 Cc: Mauri Sandberg <sandberg@mailfence.com>
  18 Cc: DENG Qingfang <dqfext@gmail.com>
  19 Cc: Florian Fainelli <f.fainelli@gmail.com>
  20 Reviewed-by: Alvin Šipraga <alsi@bang-olufsen.dk>
  21 Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
  22 Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
  23 Signed-off-by: David S. Miller <davem@davemloft.net>
  24 ---
  25  drivers/net/dsa/rtl8366rb.c | 14 ++++++++++++++
  26  1 file changed, 14 insertions(+)
  27
  28 --- a/drivers/net/dsa/rtl8366rb.c
  29 +++ b/drivers/net/dsa/rtl8366rb.c
  30 @@ -1308,6 +1308,19 @@ rtl8366rb_port_bridge_flags(struct dsa_s
  31         return 0;
  32  }
  33
  34 +static void
  35 +rtl8366rb_port_fast_age(struct dsa_switch *ds, int port)
  36 +{
  37 +       struct realtek_smi *smi = ds->priv;
  38 +
  39 +       /* This will age out any learned L2 entries */
  40 +       regmap_update_bits(smi->map, RTL8366RB_SECURITY_CTRL,
  41 +                          BIT(port), BIT(port));
  42 +       /* Restore the normal state of things */
  43 +       regmap_update_bits(smi->map, RTL8366RB_SECURITY_CTRL,
  44 +                          BIT(port), 0);
  45 +}
  46 +
  47  static int rtl8366rb_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
  48  {
  49         struct realtek_smi *smi = ds->priv;
  50 @@ -1720,6 +1733,7 @@ static const struct dsa_switch_ops rtl83
  51         .port_disable = rtl8366rb_port_disable,
  52         .port_pre_bridge_flags = rtl8366rb_port_pre_bridge_flags,
  53         .port_bridge_flags = rtl8366rb_port_bridge_flags,
  54 +       .port_fast_age = rtl8366rb_port_fast_age,
  55         .port_change_mtu = rtl8366rb_change_mtu,
  56         .port_max_mtu = rtl8366rb_max_mtu,
  57  };