netdev - Re: [net-next PATCH 10/19] net: dsa: qca8k: add support for port fast aging

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Date:   Fri, 19 Nov 2021 03:20:13 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Ansuel Smith <ansuelsmth@...il.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [net-next PATCH 10/19] net: dsa: qca8k: add support for port
 fast aging

On Wed, Nov 17, 2021 at 10:04:42PM +0100, Ansuel Smith wrote:
> The switch doesn't support fast aging but it does support the flush of
> the ARL table for a specific port. Add this function to simulate
> fast aging and proprely support stp state set.
                 ~~~~~~~~                   ~~~
                 properly                   verb? noun? what are you saying here?

What difference do you see between fast ageing and ARL table flushing
for a specific port?

> 
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> ---
>  drivers/net/dsa/qca8k.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
> index cf4f69b36b47..d73886b36e6a 100644
> --- a/drivers/net/dsa/qca8k.c
> +++ b/drivers/net/dsa/qca8k.c
> @@ -1823,6 +1823,16 @@ qca8k_port_bridge_leave(struct dsa_switch *ds, int port, struct net_device *br)
>  			   QCA8K_PORT_LOOKUP_MEMBER, BIT(cpu_port));
>  }
>  
> +static void
> +qca8k_port_fast_age(struct dsa_switch *ds, int port)
> +{
> +	struct qca8k_priv *priv = ds->priv;
> +
> +	mutex_lock(&priv->reg_mutex);
> +	qca8k_fdb_access(priv, QCA8K_FDB_FLUSH_PORT, port);
> +	mutex_unlock(&priv->reg_mutex);
> +}
> +
>  static int
>  qca8k_port_enable(struct dsa_switch *ds, int port,
>  		  struct phy_device *phy)
> @@ -2031,6 +2041,7 @@ static const struct dsa_switch_ops qca8k_switch_ops = {
>  	.port_stp_state_set	= qca8k_port_stp_state_set,
>  	.port_bridge_join	= qca8k_port_bridge_join,
>  	.port_bridge_leave	= qca8k_port_bridge_leave,
> +	.port_fast_age		= qca8k_port_fast_age,
>  	.port_fdb_add		= qca8k_port_fdb_add,
>  	.port_fdb_del		= qca8k_port_fdb_del,
>  	.port_fdb_dump		= qca8k_port_fdb_dump,
> -- 
> 2.32.0
>