netdev - Re: [RFC next-next v2 3/5] net: marvell: prestera: Add ethtool interface support

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Message-ID: <20200511173118.GL2245@nanopsycho>
Date:   Mon, 11 May 2020 19:31:18 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Vadym Kochan <vadym.kochan@...ision.eu>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Oleksandr Mazur <oleksandr.mazur@...ision.eu>,
        Serhiy Boiko <serhiy.boiko@...ision.eu>,
        Serhiy Pshyk <serhiy.pshyk@...ision.eu>,
        Volodymyr Mytnyk <volodymyr.mytnyk@...ision.eu>,
        Taras Chornyi <taras.chornyi@...ision.eu>,
        Andrii Savka <andrii.savka@...ision.eu>,
        Jiri Pirko <jiri@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>,
        Andrew Lunn <andrew@...n.ch>,
        Chris Packham <Chris.Packham@...iedtelesis.co.nz>
Subject: Re: [RFC next-next v2 3/5] net: marvell: prestera: Add ethtool
 interface support

Fri, May 01, 2020 at 01:20:50AM CEST, vadym.kochan@...ision.eu wrote:
>The ethtool API provides support for the configuration of the following
>features: speed and duplex, auto-negotiation, MDI-x, forward error
>correction, port media type. The API also provides information about the
>port status, hardware and software statistic.  The following limitation

No double space.


>exists:
>
>    - port media type should be configured before speed setting
>    - ethtool –m option is not supported
>    - ethtool –p option is not supported

Those are some odd dashes...


>    - ethtool -r option is supported for RJ45 port only
>    - the following combination of parameters is not supported:
>
>          ethtool -s sw1pX port XX autoneg on
>
>    - forward error correction feature is supported only on SFP ports, 10G
>      speed
>
>    - auto-negotiation and MDI-x features are not supported on
>      Copper-to-Fiber SFP module
>

[...]


>+static const struct ethtool_ops ethtool_ops = {
>+	.get_drvinfo = prestera_port_get_drvinfo,
>+	.get_link_ksettings = prestera_port_get_link_ksettings,
>+	.set_link_ksettings = prestera_port_set_link_ksettings,
>+	.get_fecparam = prestera_port_get_fecparam,
>+	.set_fecparam = prestera_port_set_fecparam,
>+	.get_sset_count = prestera_port_get_sset_count,
>+	.get_strings = prestera_port_get_strings,
>+	.get_ethtool_stats = prestera_port_get_ethtool_stats,
>+	.get_link = ethtool_op_get_link,
>+	.nway_reset = prestera_port_nway_reset
>+};

I wonder, wouldn't it be better to put the ethtool bits into a separate
.c file. You have a separate .c file for less :)


>+
> static int prestera_port_create(struct prestera_switch *sw, u32 id)
> {
> 	struct prestera_port *port;
>@@ -264,6 +1023,7 @@ static int prestera_port_create(struct prestera_switch *sw, u32 id)
> 
> 	dev->features |= NETIF_F_NETNS_LOCAL;
> 	dev->netdev_ops = &netdev_ops;
>+	dev->ethtool_ops = &ethtool_ops;
> 
> 	netif_carrier_off(dev);
> 

[...]