Re: [net-next v3 4/6] net: marvell: prestera: Add ethtool interface support

[Jiri Pirko <jiri@resnulli.us>]

Sat, Jul 25, 2020 at 05:06:49PM CEST, vadym.kochan@plvision.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
>exists:
>
>    - port media type should be configured before speed setting
>    - ethtool -m option is not supported
>    - ethtool -p option is not supported
>    - 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
>
>Signed-off-by: Andrii Savka <andrii.savka@plvision.eu>
>Signed-off-by: Serhiy Boiko <serhiy.boiko@plvision.eu>
>Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
>---

[...]

	
>+
>+void prestera_ethtool_get_stats(struct net_device *dev,
>+				struct ethtool_stats *stats, u64 *data)
>+{
>+	struct prestera_port *port = netdev_priv(dev);
>+	struct prestera_port_stats *port_stats;
>+
>+	port_stats = &port->cached_hw_stats.stats;
>+
>+	memcpy((u8 *)data, port_stats, sizeof(*port_stats));

Avoid the needless cast.


[...]
	
	
>+static const struct ethtool_ops ethtool_ops = {
>+	.get_drvinfo = prestera_ethtool_get_drvinfo,
>+	.get_link_ksettings = prestera_ethtool_get_link_ksettings,
>+	.set_link_ksettings = prestera_ethtool_set_link_ksettings,
>+	.get_fecparam = prestera_ethtool_get_fecparam,
>+	.set_fecparam = prestera_ethtool_set_fecparam,
>+	.get_sset_count = prestera_ethtool_get_sset_count,
>+	.get_strings = prestera_ethtool_get_strings,
>+	.get_ethtool_stats = prestera_ethtool_get_stats,
>+	.get_link = ethtool_op_get_link,
>+	.nway_reset = prestera_ethtool_nway_reset
>+};

Have the struct in prestera_ethtool.c and export just the struct instead
of all the callbacks.


>+
> static int prestera_port_create(struct prestera_switch *sw, u32 id)
> {
> 	struct prestera_port *port;
>@@ -235,6 +266,7 @@ 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);
> 
>-- 
>2.17.1
>