Commit 99943382 authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

net: Allow network devices to have PHY statistics 



Add a new callback: get_ethtool_phy_stats() which allows network device
drivers not making use of the PHY library to return PHY statistics.
Update ethtool_get_phy_stats(), __ethtool_get_sset_count() and
__ethtool_get_strings() accordingly to interogate the network device
about ETH_SS_PHY_STATS.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c59530d0

include/linux/ethtool.h

+5 −0
Original line number Diff line number Diff line
@@ -312,6 +312,9 @@ bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32, 
 *	by kernel. Returns a negative error code or zero.

 * @get_fecparam: Get the network device Forward Error Correction parameters.

 * @set_fecparam: Set the network device Forward Error Correction parameters.

 * @get_ethtool_phy_stats: Return extended statistics about the PHY device.

 *	This is only useful if the device maintains PHY statistics and

 *	cannot use the standard PHY library helpers.

 *

 * All operations are optional (i.e. the function pointer may be set

 * to %NULL) and callers must take this into account.  Callers must
@@ -407,5 +410,7 @@ struct ethtool_ops { 
				      struct ethtool_fecparam *);

	int	(*set_fecparam)(struct net_device *,

				      struct ethtool_fecparam *);

	void	(*get_ethtool_phy_stats)(struct net_device *,

					 struct ethtool_stats *, u64 *);

};

#endif /* _LINUX_ETHTOOL_H */

net/core/ethtool.c

+21 −18
Original line number Diff line number Diff line
@@ -227,12 +227,9 @@ static int __ethtool_get_sset_count(struct net_device *dev, int sset) 
	if (sset == ETH_SS_PHY_TUNABLES)

		return ARRAY_SIZE(phy_tunable_strings);



	if (sset == ETH_SS_PHY_STATS) {

		if (dev->phydev)

	if (sset == ETH_SS_PHY_STATS && dev->phydev &&

	    !ops->get_ethtool_phy_stats)

		return phy_ethtool_get_sset_count(dev->phydev);

		else

			return -EOPNOTSUPP;

	}



	if (ops->get_sset_count && ops->get_strings)

		return ops->get_sset_count(dev, sset);
@@ -255,12 +252,10 @@ static void __ethtool_get_strings(struct net_device *dev, 
		memcpy(data, tunable_strings, sizeof(tunable_strings));

	else if (stringset == ETH_SS_PHY_TUNABLES)

		memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));

	else if (stringset == ETH_SS_PHY_STATS) {

		if (dev->phydev)

	else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&

		 !ops->get_ethtool_phy_stats)

		phy_ethtool_get_strings(dev->phydev, data);

	else

			return;

	} else

		/* ops->get_strings is valid because checked earlier */

		ops->get_strings(dev, stringset, data);

}
@@ -1972,15 +1967,19 @@ static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 


static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)

{

	struct ethtool_stats stats;

	const struct ethtool_ops *ops = dev->ethtool_ops;

	struct phy_device *phydev = dev->phydev;

	struct ethtool_stats stats;

	u64 *data;

	int ret, n_stats;



	if (!phydev)

	if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))

		return -EOPNOTSUPP;



	if (dev->phydev && !ops->get_ethtool_phy_stats)

		n_stats = phy_ethtool_get_sset_count(dev->phydev);

	else

		n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);

	if (n_stats < 0)

		return n_stats;

	if (n_stats > S32_MAX / sizeof(u64))
@@ -1995,9 +1994,13 @@ static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 
	if (n_stats && !data)

		return -ENOMEM;



	if (dev->phydev && !ops->get_ethtool_phy_stats) {

		ret = phy_ethtool_get_stats(dev->phydev, &stats, data);

		if (ret < 0)

			return ret;

	} else {

		ops->get_ethtool_phy_stats(dev, &stats, data);

	}



	ret = -EFAULT;

	if (copy_to_user(useraddr, &stats, sizeof(stats)))

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