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Message-ID: <ZMDXFiSFI/hyr8j6@corigine.com>
Date: Wed, 26 Jul 2023 10:19:34 +0200
From: Simon Horman <simon.horman@...igine.com>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Atin Bainada <hi@...nb.me>,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH 2/3] net: dsa: qca8k: make learning configurable
and keep off if standalone
On Mon, Jul 24, 2023 at 05:30:57AM +0200, Christian Marangi wrote:
> Address learning should initially be turned off by the driver for port
> operation in standalone mode, then the DSA core handles changes to it
> via ds->ops->port_bridge_flags().
>
> Currently this is not the case for qca8k where learning is enabled
> unconditionally in qca8k_setup for every user port.
>
> Handle ports configured in standalone mode by making the learning
> configurable and not enabling it by default.
>
> Implement .port_pre_bridge_flags and .port_bridge_flags dsa ops to
> enable learning for bridge that request it and tweak
> .port_stp_state_set to correctly disable learning when port is
> configured in standalone mode.
>
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c
...
> @@ -1978,6 +1977,8 @@ static const struct dsa_switch_ops qca8k_switch_ops = {
> .port_change_mtu = qca8k_port_change_mtu,
> .port_max_mtu = qca8k_port_max_mtu,
> .port_stp_state_set = qca8k_port_stp_state_set,
> + .port_pre_bridge_flags = qca8k_port_pre_bridge_flags,
> + .port_bridge_flags = qca8k_port_bridge_flags,
> .port_bridge_join = qca8k_port_bridge_join,
> .port_bridge_leave = qca8k_port_bridge_leave,
> .port_fast_age = qca8k_port_fast_age,
> diff --git a/drivers/net/dsa/qca/qca8k-common.c b/drivers/net/dsa/qca/qca8k-common.c
...
> @@ -591,6 +611,30 @@ void qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
>
> qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
> QCA8K_PORT_LOOKUP_STATE_MASK, stp_state);
> +
> + qca8k_port_configure_learning(ds, port, learning);
> +}
> +
> +int qca8k_port_pre_bridge_flags(struct dsa_switch *ds, int port,
> + struct switchdev_brport_flags flags,
> + struct netlink_ext_ack *extack)
> +{
> + if (flags.mask & ~BR_LEARNING)
> + return -EINVAL;
If I am reading things right then some implementation of this callback
return -EINVAL when they see unexpected flags. And some seem not to
- possibly because all flags are expected.
So I'm slightly unsure if this is correct or not.
> +
> + return 0;
> +}
...
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