netdev - Re: [PATCH net-next RFC v4 1/5] net: ethtool: Refactor identical get_ts

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Date:   Wed, 12 Apr 2023 16:16:36 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Köry Maincent <kory.maincent@...tlin.com>
Cc:     netdev@...r.kernel.org, kuba@...nel.org, glipus@...il.com,
        maxime.chevallier@...tlin.com, vadim.fedorenko@...ux.dev,
        richardcochran@...il.com, gerhard@...leder-embedded.com,
        thomas.petazzoni@...tlin.com, krzysztof.kozlowski+dt@...aro.org,
        robh+dt@...nel.org, linux@...linux.org.uk
Subject: Re: [PATCH net-next RFC v4 1/5] net: ethtool: Refactor identical
 get_ts_info implementations.

On Thu, Apr 06, 2023 at 07:33:04PM +0200, Köry Maincent wrote:
> From: Richard Cochran <richardcochran@...il.com>
> 
> The vlan, macvlan and the bonding drivers call their "real" device driver
> in order to report the time stamping capabilities.  Provide a core
> ethtool helper function to avoid copy/paste in the stack.
> 
> Signed-off-by: Richard Cochran <richardcochran@...il.com>
> Signed-off-by: Kory Maincent <kory.maincent@...tlin.com>
> ---
>  static netdev_features_t macvlan_fix_features(struct net_device *dev,
> diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
> index 798d35890118..a21302032dfa 100644
> --- a/include/linux/ethtool.h
> +++ b/include/linux/ethtool.h
> @@ -1042,6 +1042,14 @@ static inline int ethtool_mm_frag_size_min_to_add(u32 val_min, u32 *val_add,
>  	return -EINVAL;
>  }
>  
> +/**
> + * ethtool_get_ts_info_by_layer - Obtains time stamping capabilities from the MAC or PHY layer.
> + * @dev: pointer to net_device structure
> + * @info: buffer to hold the result
> + * Returns zero on sauces, non-zero otherwise.

Not sure if I'm missing some joke with the sauces here.

> + */
> +int ethtool_get_ts_info_by_layer(struct net_device *dev, struct ethtool_ts_info *info);
> +
>  /**
>   * ethtool_sprintf - Write formatted string to ethtool string data
>   * @data: Pointer to start of string to update