linux-kernel - Re: [PATCH net-next v2 1/5] net: ipqess: introduce the Qualcomm IPQESS driver

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Message-ID: <20220517090910.7e1344ca@pc-20.home>
Date:   Tue, 17 May 2022 09:09:10 +0200
From:   Maxime Chevallier <maxime.chevallier@...tlin.com>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>
Cc:     davem@...emloft.net, Rob Herring <robh+dt@...nel.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, thomas.petazzoni@...tlin.com,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Vladimir Oltean <vladimir.oltean@....com>,
        Luka Perkov <luka.perkov@...tura.hr>,
        Robert Marko <robert.marko@...tura.hr>
Subject: Re: [PATCH net-next v2 1/5] net: ipqess: introduce the Qualcomm
 IPQESS driver

Hello Russell,

Thanks for the review.

On Sat, 14 May 2022 18:18:17 +0100
"Russell King (Oracle)" <linux@...linux.org.uk> wrote:

> On Sat, May 14, 2022 at 05:06:52PM +0200, Maxime Chevallier wrote:
> > +static int ipqess_do_ioctl(struct net_device *netdev, struct ifreq
> > *ifr, int cmd) +{
> > +	struct ipqess *ess = netdev_priv(netdev);
> > +
> > +	switch (cmd) {
> > +	case SIOCGMIIPHY:
> > +	case SIOCGMIIREG:
> > +	case SIOCSMIIREG:
> > +		return phylink_mii_ioctl(ess->phylink, ifr, cmd);
> > +	default:
> > +		break;
> > +	}
> > +
> > +	return -EOPNOTSUPP;
> > +}  
> 
> Is there a reason this isn't just:
> 
> 	return phylink_mii_ioctl(ess->phylink, ifr, cmd);

Not really, an oversight on my part, I'll address that in v3

> ?
> 
> > +static int ipqess_axi_probe(struct platform_device *pdev)
> > +{
> > +	struct device_node *np = pdev->dev.of_node;
> > +	struct net_device *netdev;
> > +	phy_interface_t phy_mode;
> > +	struct resource *res;
> > +	struct ipqess *ess;
> > +	int i, err = 0;
> > +
> > +	netdev = devm_alloc_etherdev_mqs(&pdev->dev, sizeof(struct
> > ipqess),
> > +					 IPQESS_NETDEV_QUEUES,
> > +					 IPQESS_NETDEV_QUEUES);
> > +	if (!netdev)
> > +		return -ENOMEM;
> > +
> > +	ess = netdev_priv(netdev);
> > +	ess->netdev = netdev;
> > +	ess->pdev = pdev;
> > +	spin_lock_init(&ess->stats_lock);
> > +	SET_NETDEV_DEV(netdev, &pdev->dev);
> > +	platform_set_drvdata(pdev, netdev);
> > +
> > +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > +	ess->hw_addr = devm_ioremap_resource(&pdev->dev, res);
> > +	if (IS_ERR(ess->hw_addr))
> > +		return PTR_ERR(ess->hw_addr);
> > +
> > +	err = of_get_phy_mode(np, &phy_mode);
> > +	if (err) {
> > +		dev_err(&pdev->dev, "incorrect phy-mode\n");
> > +		return err;
> > +	}
> > +
> > +	ess->ess_clk = devm_clk_get(&pdev->dev, "ess");
> > +	if (!IS_ERR(ess->ess_clk))
> > +		clk_prepare_enable(ess->ess_clk);
> > +
> > +	ess->ess_rst = devm_reset_control_get(&pdev->dev, "ess");
> > +	if (IS_ERR(ess->ess_rst))
> > +		goto err_clk;
> > +
> > +	ipqess_reset(ess);
> > +
> > +	ess->phylink_config.dev = &netdev->dev;
> > +	ess->phylink_config.type = PHYLINK_NETDEV;
> > +
> > +	__set_bit(PHY_INTERFACE_MODE_INTERNAL,
> > +		  ess->phylink_config.supported_interfaces);  
> 
> No mac capabilities?

My bad too, I also missed that. I'll also address that in v3.

> > +
> > +	ess->phylink = phylink_create(&ess->phylink_config,
> > +				      of_fwnode_handle(np),
> > phy_mode,
> > +				      &ipqess_phylink_mac_ops);  
> 

Thanks,

Maxime