netdev - Re: [PATCH v1 1/4] net: ag71xx: port to phylink

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Date:   Wed, 16 Oct 2019 14:12:16 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Chris Snook <chris.snook@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        James Hogan <jhogan@...nel.org>,
        Jay Cliburn <jcliburn@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Paul Burton <paul.burton@...s.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH v1 1/4] net: ag71xx: port to phylink

On Mon, Oct 14, 2019 at 08:15:46AM +0200, Oleksij Rempel wrote:
> The port to phylink was done as close as possible to initial
> functionality.
> Theoretically this HW can support flow control, practically seems to be not
> enough to just enable it. So, more work should be done.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>

Hi Oleksij

Please include Russell King in Cc: in future.

> -static void ag71xx_phy_link_adjust(struct net_device *ndev)
> +static void ag71xx_mac_validate(struct phylink_config *config,
> +			    unsigned long *supported,
> +			    struct phylink_link_state *state)
>  {
> -	struct ag71xx *ag = netdev_priv(ndev);
> +	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
> +
> +	if (state->interface != PHY_INTERFACE_MODE_NA &&
> +	    state->interface != PHY_INTERFACE_MODE_GMII &&
> +	    state->interface != PHY_INTERFACE_MODE_MII) {
> +		bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
> +		return;
> +	}
> +
> +	phylink_set(mask, MII);
> +
> +	/* flow control is not supported */
>  
> -	ag71xx_link_adjust(ag, true);
> +	phylink_set(mask, 10baseT_Half);
> +	phylink_set(mask, 10baseT_Full);
> +	phylink_set(mask, 100baseT_Half);
> +	phylink_set(mask, 100baseT_Full);
> +
> +	phylink_set(mask, 1000baseT_Full);
> +	phylink_set(mask, 1000baseX_Full);

Can the MAC/PHY dynamically switch between MII and GMII? Maybe you
should only add 1G support when interface is GMII?

> @@ -1239,6 +1255,13 @@ static int ag71xx_open(struct net_device *ndev)
>  	unsigned int max_frame_len;
>  	int ret;
>  
> +	ret = phylink_of_phy_connect(ag->phylink, ag->pdev->dev.of_node, 0);
> +	if (ret) {
> +		netif_info(ag, link, ndev, "phylink_of_phy_connect filed with err: %i\n",
> +			   ret);

netif_info seems wrong. _err()?

	   Andrew