generic: backport 5.16 RTL8366RB improvements

The prerequisite DSA changes for the nice RTL8366RB improvements
are already backported so bring back these changes as well.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/774-v5.16-09-net-dsa-rtl8366rb-Support-fast-aging.patch b/target/linux/generic/backport-5.15/774-v5.16-09-net-dsa-rtl8366rb-Support-fast-aging.patch
new file mode 100644
index 0000000000..a74108e23d
--- /dev/null
+++ b/target/linux/generic/backport-5.15/774-v5.16-09-net-dsa-rtl8366rb-Support-fast-aging.patch
@@ -0,0 +1,57 @@
+From 8eb13420eb9ab4a4e2ebd612bf5dc9dba0039236 Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Tue, 5 Oct 2021 21:47:03 +0200
+Subject: [PATCH 09/11] net: dsa: rtl8366rb: Support fast aging
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This implements fast aging per-port using the special "security"
+register, which will flush any learned L2 LUT entries on a port.
+
+The vendor API just enabled setting and clearing this bit, so
+we set it to age out any entries on the port and then we clear
+it again.
+
+Suggested-by: Vladimir Oltean <olteanv@gmail.com>
+Cc: Mauri Sandberg <sandberg@mailfence.com>
+Cc: DENG Qingfang <dqfext@gmail.com>
+Cc: Florian Fainelli <f.fainelli@gmail.com>
+Reviewed-by: Alvin Šipraga <alsi@bang-olufsen.dk>
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/rtl8366rb.c | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+--- a/drivers/net/dsa/rtl8366rb.c
++++ b/drivers/net/dsa/rtl8366rb.c
+@@ -1308,6 +1308,19 @@ rtl8366rb_port_bridge_flags(struct dsa_s
+ 	return 0;
+ }
+ 
++static void
++rtl8366rb_port_fast_age(struct dsa_switch *ds, int port)
++{
++	struct realtek_smi *smi = ds->priv;
++
++	/* This will age out any learned L2 entries */
++	regmap_update_bits(smi->map, RTL8366RB_SECURITY_CTRL,
++			   BIT(port), BIT(port));
++	/* Restore the normal state of things */
++	regmap_update_bits(smi->map, RTL8366RB_SECURITY_CTRL,
++			   BIT(port), 0);
++}
++
+ static int rtl8366rb_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
+ {
+ 	struct realtek_smi *smi = ds->priv;
+@@ -1720,6 +1733,7 @@ static const struct dsa_switch_ops rtl83
+ 	.port_disable = rtl8366rb_port_disable,
+ 	.port_pre_bridge_flags = rtl8366rb_port_pre_bridge_flags,
+ 	.port_bridge_flags = rtl8366rb_port_bridge_flags,
++	.port_fast_age = rtl8366rb_port_fast_age,
+ 	.port_change_mtu = rtl8366rb_change_mtu,
+ 	.port_max_mtu = rtl8366rb_max_mtu,
+ };