netdev - Re: [PATCH net-next v2 2/3] net: dsa: mv88e6xxx: add support for bridge flags

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Date:   Tue, 19 Feb 2019 11:16:12 -0500
From:   Vivien Didelot <vivien.didelot@...il.com>
To:     Russell King <rmk+kernel@...linux.org.uk>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 2/3] net: dsa: mv88e6xxx: add support for
 bridge flags

Hi Russell,

On Sun, 17 Feb 2019 16:32:34 +0000, Russell King <rmk+kernel@...linux.org.uk> wrote:
> +static int mv88e6xxx_port_bridge_flags(struct dsa_switch *ds, int port,
> +				       unsigned long flags)
> +{
> +	struct mv88e6xxx_chip *chip = ds->priv;
> +	bool unicast, multicast;
> +	int ret = -EOPNOTSUPP;
> +
> +	unicast = dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port) ||
> +		flags & BR_FLOOD;
> +	multicast = flags & BR_MCAST_FLOOD;
> +
> +	mutex_lock(&chip->reg_lock);
> +	if (chip->info->ops->port_set_egress_floods)
> +		ret = chip->info->ops->port_set_egress_floods(chip, port,
> +							      unicast,
> +							      multicast);
> +	mutex_unlock(&chip->reg_lock);
> +
> +	return ret;
> +}
> +
> +static unsigned long mv88e6xxx_bridge_flags_support(struct dsa_switch *ds)
> +{
> +	struct mv88e6xxx_chip *chip = ds->priv;
> +	unsigned long support = 0;
> +
> +	if (chip->info->ops->port_set_egress_floods)
> +		support |= BR_FLOOD | BR_MCAST_FLOOD;
> +
> +	return support;
> +}

I think that it isn't necessary to propagate the notion of bridge flags down
to the DSA drivers. It might be just enough to add:

    port_egress_flood(dsa_switch *ds, int port, bool uc, bool mc)

to dsa_switch_ops and set BR_FLOOD | BR_MCAST_FLOOD from the DSA core,
if the targeted driver has ds->ops->port_set_egress_flood. What do you think?


Thanks,

	Vivien