net: phy: Define PHY statistics ethtool_phy_ops

Extend ethtool_phy_ops to include the 3 function pointers necessary for
implementing PHY statistics. In a subsequent change we will uninline
those functions.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phy_device.c

@@ -3028,6 +3028,9 @@ static struct phy_driver genphy_driver = {
 };
 
 static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
+	.get_sset_count		= phy_ethtool_get_sset_count,
+	.get_strings		= phy_ethtool_get_strings,
+	.get_stats		= phy_ethtool_get_stats,
 	.start_cable_test	= phy_start_cable_test,
 	.start_cable_test_tdr	= phy_start_cable_test_tdr,
 };

include/linux/ethtool.h

@@ -508,13 +508,20 @@ struct phy_tdr_config;
 
 /**
  * struct ethtool_phy_ops - Optional PHY device options
+ * @get_sset_count: Get number of strings that @get_strings will write.
+ * @get_strings: Return a set of strings that describe the requested objects
+ * @get_stats: Return extended statistics about the PHY device.
  * @start_cable_test - Start a cable test
  * @start_cable_test_tdr - Start a Time Domain Reflectometry cable test
  *
  * All operations are optional (i.e. the function pointer may be set to %NULL)
  * and callers must take this into account. Callers must hold the RTNL lock.
  */
 struct ethtool_phy_ops {
+	int (*get_sset_count)(struct phy_device *dev);
+	int (*get_strings)(struct phy_device *dev, u8 *data);
+	int (*get_stats)(struct phy_device *dev,
+			 struct ethtool_stats *stats, u64 *data);
 	int (*start_cable_test)(struct phy_device *phydev,
 				struct netlink_ext_ack *extack);
 	int (*start_cable_test_tdr)(struct phy_device *phydev,