Re: [PATCH net-next v5 2/8] net: ethtool: plumb PHY stats to PHY drivers

+	/**
+	 * @get_link_stats: Retrieve link statistics.
+	 * @dev: The PHY device for which the statistics are retrieved.
+	 * @link_stats: structure where link-specific stats will be stored.
+	 *
+	 * Retrieves link-related statistics for the given PHY device. The input
+	 * structure is pre-initialized with `ETHTOOL_STAT_NOT_SET`, and the
+	 * driver must only modify members corresponding to supported
+	 * statistics. Unmodified members will remain set to
+	 * `ETHTOOL_STAT_NOT_SET` and will not be returned to userspace.
+	 *
+	 * Return: 0 on success or a negative error code on failure.

+	 */
+	void (*get_link_stats)(struct phy_device *dev,
+			       struct ethtool_link_ext_stats *link_stats);
 	/** @get_sset_count: Number of statistic counters */
 	int (*get_sset_count)(struct phy_device *dev);
 	/** @get_strings: Names of the statistic counters */

@@ -1777,6 +1810,49 @@ static inline bool phy_is_pseudo_fixed_link(struct phy_device *phydev)
 	return phydev->is_pseudo_fixed_link;
 }
 
+/**
+ * phy_ethtool_get_phy_stats - Retrieve standardized PHY statistics
+ * @phydev: Pointer to the PHY device
+ * @phy_stats: Pointer to ethtool_eth_phy_stats structure
+ * @phydev_stats: Pointer to ethtool_phy_stats structure
+ *
+ * Fetches PHY statistics using a kernel-defined interface for consistent
+ * diagnostics. Unlike phy_ethtool_get_stats(), which allows custom stats,
+ * this function enforces a standardized format for better interoperability.
+ */
+static inline void phy_ethtool_get_phy_stats(struct phy_device *phydev,
+					struct ethtool_eth_phy_stats *phy_stats,
+					struct ethtool_phy_stats *phydev_stats)
+{
+	if (!phydev->drv || !phydev->drv->get_phy_stats)
+		return;
+
+	mutex_lock(&phydev->lock);
+	phydev->drv->get_phy_stats(phydev, phy_stats, phydev_stats);
+	mutex_unlock(&phydev->lock);
+}
+
+/**
+ * phy_ethtool_get_link_ext_stats - Retrieve extended link statistics for a PHY
+ * @phydev: Pointer to the PHY device
+ * @link_stats: Pointer to the structure to store extended link statistics
+ *
+ * Populates the ethtool_link_ext_stats structure with link down event counts
+ * and additional driver-specific link statistics, if available.
+ */
+static inline void phy_ethtool_get_link_ext_stats(struct phy_device *phydev,
+				    struct ethtool_link_ext_stats *link_stats)
+{
+	link_stats->link_down_events = READ_ONCE(phydev->link_down_events);
+
+	if (!phydev->drv || !phydev->drv->get_link_stats)
+		return;
+
+	mutex_lock(&phydev->lock);
+	phydev->drv->get_link_stats(phydev, link_stats);
+	mutex_unlock(&phydev->lock);
+}