linux-kernel - Re: [net-next PATCH v2 2/2] net: airoha: add phylink support for GDM1

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Message-ID: <aPpFjvJTv1_CEMy6@lore-desk>
Date: Thu, 23 Oct 2025 17:11:10 +0200
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Russell King <linux@...linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH v2 2/2] net: airoha: add phylink support for GDM1

> In preparation for support of GDM2+ port, fill in phylink OPs for GDM1
> that is an INTERNAL port for the Embedded Switch.

Hi Christian,

just few nitpicks inline. Fixing them:

Acked-by: Lorenzo Bianconi <lorenzo@...nel.org>

> 
> Add all the phylink start/stop and fill in the MAC capabilities and the
> internal interface as the supported interface.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> ---
>  drivers/net/ethernet/airoha/Kconfig      |  1 +
>  drivers/net/ethernet/airoha/airoha_eth.c | 77 +++++++++++++++++++++++-
>  drivers/net/ethernet/airoha/airoha_eth.h |  3 +
>  3 files changed, 80 insertions(+), 1 deletion(-)
> 

[...]

> @@ -2813,6 +2817,18 @@ static const struct ethtool_ops airoha_ethtool_ops = {
>  	.get_link		= ethtool_op_get_link,
>  };
>  
> +static struct phylink_pcs *airoha_phylink_mac_select_pcs(struct phylink_config *config,
> +							 phy_interface_t interface)

can you please do not go over 79 columns? (I still like it :))

static struct phylink_pcs *
airoha_phylink_mac_select_pcs(struct phylink_config *config,
			      phy_interface_t interface)
{
	return NULL;
}

> +{
> +	return NULL;
> +}
> +
> +static void airoha_mac_config(struct phylink_config *config,
> +			      unsigned int mode,
> +			      const struct phylink_link_state *state)
> +{
> +}
> +
>  static int airoha_metadata_dst_alloc(struct airoha_gdm_port *port)
>  {
>  	int i;
> @@ -2857,6 +2873,57 @@ bool airoha_is_valid_gdm_port(struct airoha_eth *eth,
>  	return false;
>  }
>  
> +static void airoha_mac_link_up(struct phylink_config *config,
> +			       struct phy_device *phy, unsigned int mode,
> +			       phy_interface_t interface, int speed,
> +			       int duplex, bool tx_pause, bool rx_pause)
> +{
> +}
> +
> +static void airoha_mac_link_down(struct phylink_config *config,
> +				 unsigned int mode, phy_interface_t interface)
> +{
> +}
> +
> +static const struct phylink_mac_ops airoha_phylink_ops = {
> +	.mac_select_pcs = airoha_phylink_mac_select_pcs,
> +	.mac_config = airoha_mac_config,
> +	.mac_link_up = airoha_mac_link_up,
> +	.mac_link_down = airoha_mac_link_down,
> +};

can you please align it like airoha_ethtool_ops or airoha_netdev_ops?

> +
> +static int airoha_setup_phylink(struct net_device *netdev)
> +{
> +	struct airoha_gdm_port *port = netdev_priv(netdev);
> +	struct device *dev = &netdev->dev;
> +	struct phylink *phylink;
> +	int phy_mode;
> +
> +	phy_mode = device_get_phy_mode(dev);
> +	if (phy_mode < 0) {
> +		dev_err(dev, "incorrect phy-mode\n");
> +		return phy_mode;
> +	}
> +
> +	port->phylink_config.dev = dev;
> +	port->phylink_config.type = PHYLINK_NETDEV;
> +	port->phylink_config.mac_capabilities = MAC_ASYM_PAUSE |
> +						MAC_SYM_PAUSE |
> +						MAC_10000FD;
> +
> +	__set_bit(PHY_INTERFACE_MODE_INTERNAL,
> +		  port->phylink_config.supported_interfaces);
> +
> +	phylink = phylink_create(&port->phylink_config, dev_fwnode(dev),
> +				 phy_mode, &airoha_phylink_ops);
> +	if (IS_ERR(phylink))
> +		return PTR_ERR(phylink);
> +
> +	port->phylink = phylink;
> +
> +	return 0;
> +}
> +
>  static int airoha_alloc_gdm_port(struct airoha_eth *eth,
>  				 struct device_node *np, int index)
>  {
> @@ -2935,12 +3002,18 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth,
>  	if (err)
>  		return err;
>  
> -	err = register_netdev(dev);
> +	err = airoha_setup_phylink(port->dev);
>  	if (err)
>  		goto free_metadata_dst;
>  
> +	err = register_netdev(dev);
> +	if (err)
> +		goto free_phylink;
> +
>  	return 0;
>  
> +free_phylink:
> +	phylink_destroy(port->phylink);
>  free_metadata_dst:
>  	airoha_metadata_dst_free(port);
>  	return err;
> @@ -3049,6 +3122,7 @@ static int airoha_probe(struct platform_device *pdev)
>  
>  		if (port && port->dev->reg_state == NETREG_REGISTERED) {
>  			unregister_netdev(port->dev);
> +			phylink_destroy(port->phylink);
>  			airoha_metadata_dst_free(port);
>  		}
>  	}
> @@ -3076,6 +3150,7 @@ static void airoha_remove(struct platform_device *pdev)
>  
>  		airoha_dev_stop(port->dev);
>  		unregister_netdev(port->dev);
> +		phylink_destroy(port->phylink);
>  		airoha_metadata_dst_free(port);
>  	}
>  	free_netdev(eth->napi_dev);
> diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
> index eb27a4ff5198..c144c1ece23b 100644
> --- a/drivers/net/ethernet/airoha/airoha_eth.h
> +++ b/drivers/net/ethernet/airoha/airoha_eth.h
> @@ -531,6 +531,9 @@ struct airoha_gdm_port {
>  	struct net_device *dev;
>  	int id;
>  
> +	struct phylink *phylink;
> +	struct phylink_config phylink_config;
> +
>  	struct airoha_hw_stats stats;
>  
>  	DECLARE_BITMAP(qos_sq_bmap, AIROHA_NUM_QOS_CHANNELS);
> -- 
> 2.51.0
> 

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