linux-kernel - Re: [PATCH v5 net-next 06/12] net: ethernet: ti: introduce cpsw switchdev based driver part 1

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Message-ID: <20191029122422.GL15259@lunn.ch>
Date:   Tue, 29 Oct 2019 13:24:22 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     netdev@...r.kernel.org,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        "David S . Miller" <davem@...emloft.net>,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>,
        Jiri Pirko <jiri@...nulli.us>,
        Florian Fainelli <f.fainelli@...il.com>,
        Sekhar Nori <nsekhar@...com>, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, Murali Karicheri <m-karicheri2@...com>,
        Ivan Vecera <ivecera@...hat.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v5 net-next 06/12] net: ethernet: ti: introduce cpsw
  switchdev based driver part 1 - dual-emac

>  config TI_CPTS
>  	bool "TI Common Platform Time Sync (CPTS) Support"
> -	depends on TI_CPSW || TI_KEYSTONE_NETCP || COMPILE_TEST
> +	depends on TI_CPSW || TI_KEYSTONE_NETCP || COMPILE_TEST || TI_CPSW_SWITCHDEV

nit picking, but COMPILE_TEST is generally last on the line.

> +/**
> + * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
> + * if it's not deleted
> + * @ndev: device to sync
> + * @addr: address to be added or deleted
> + * @vid: vlan id, if vid < 0 set/unset address for real device
> + * @add: add address if the flag is set or remove otherwise
> + */
> +static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
> +		       int vid, int add)
> +{
> +	struct cpsw_priv *priv = netdev_priv(ndev);
> +	struct cpsw_common *cpsw = priv->cpsw;
> +	int slave_no = cpsw_slave_index(cpsw, priv);
> +	int mask, flags, ret;

David will complain about reverse Christmas tree. You need to move
some of the assignments into the body of the function. This problems
happens a few times in the code.

> +static int cpsw_set_pauseparam(struct net_device *ndev,
> +			       struct ethtool_pauseparam *pause)
> +{
> +	struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
> +	struct cpsw_priv *priv = netdev_priv(ndev);
> +
> +	priv->rx_pause = pause->rx_pause ? true : false;
> +	priv->tx_pause = pause->tx_pause ? true : false;
> +
> +	return phy_restart_aneg(cpsw->slaves[priv->emac_port - 1].phy);
> +}

You should look at the value of pause.autoneg.

> +static const struct devlink_ops cpsw_devlink_ops;

It would be nice to avoid this forward declaration.

> +static const struct devlink_param cpsw_devlink_params[] = {
> +	DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_ALE_BYPASS,
> +			     "ale_bypass", DEVLINK_PARAM_TYPE_BOOL,
> +			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
> +			     cpsw_dl_ale_ctrl_get, cpsw_dl_ale_ctrl_set, NULL),
> +};

Is this documented?

   Andrew