linux-kernel - Re: [PATCH net-next v5 06/16] net: dsa: vsc73xx: add port_stp_state

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Message-ID: <20240227192735.GN277116@kernel.org>
Date: Tue, 27 Feb 2024 19:27:35 +0000
From: Simon Horman <horms@...nel.org>
To: Pawel Dembicki <paweldembicki@...il.com>
Cc: netdev@...r.kernel.org, linus.walleij@...aro.org,
	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>,
	Claudiu Manoil <claudiu.manoil@....com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	UNGLinuxDriver@...rochip.com, Russell King <linux@...linux.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v5 06/16] net: dsa: vsc73xx: add
 port_stp_state_set function

On Fri, Feb 23, 2024 at 10:00:36PM +0100, Pawel Dembicki wrote:
> This isn't a fully functional implementation of 802.1D, but
> port_stp_state_set is required for a future tag8021q operations.
> 
> This implementation handles properly all states, but vsc73xx doesn't
> forward STP packets.
> 
> Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>

..

> diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c

..

> @@ -1036,6 +1029,89 @@ static void vsc73xx_phylink_get_caps(struct dsa_switch *dsa, int port,
>  	config->mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000;
>  }
>  
> +static void vsc73xx_refresh_fwd_map(struct dsa_switch *ds, int port, u8 state)
> +{
> +	struct dsa_port *other_dp, *dp = dsa_to_port(ds, port);
> +	struct vsc73xx *vsc = ds->priv;
> +	u16 mask;
> +
> +	if (state != BR_STATE_FORWARDING) {
> +		/* Ports that aren't in the forwarding state must not
> +		 * forward packets anywhere.
> +		 */
> +		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> +				    VSC73XX_SRCMASKS + port,
> +				    VSC73XX_SRCMASKS_PORTS_MASK, 0);
> +
> +		dsa_switch_for_each_available_port(other_dp, ds) {
> +			if (other_dp == dp)
> +				continue;
> +			vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> +					    VSC73XX_SRCMASKS + other_dp->index,
> +					    BIT(port), 0);
> +		}
> +
> +	return;

Nit: the line above should be indented by one more tab.

> +	}

..