ethtool: Extend ethtool plugin module eeprom API to phylib

This patch extends the ethtool plugin module eeprom API to support cards
whose phy support is delegated to a separate driver.

The handlers for ETHTOOL_GMODULEINFO and ETHTOOL_GMODULEEEPROM call the
module_info and module_eeprom functions if the phy driver provides them;
otherwise the handlers call the equivalent ethtool_ops functions provided
by network drivers with built-in phy support.

Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 22af8f8..9c189a1 100644 (file)
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -565,6 +565,15 @@ struct phy_driver {
        void (*write_mmd_indirect)(struct phy_device *dev, int ptrad,
                                   int devnum, int regnum, u32 val);
 
+       /* Get the size and type of the eeprom contained within a plug-in
+        * module */
+       int (*module_info)(struct phy_device *dev,
+                          struct ethtool_modinfo *modinfo);
+
+       /* Get the eeprom information from the plug-in module */
+       int (*module_eeprom)(struct phy_device *dev,
+                            struct ethtool_eeprom *ee, u8 *data);
+
        struct device_driver driver;
 };
 #define to_phy_driver(d) container_of(d, struct phy_driver, driver)

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 550892c..91f74f3 100644 (file)
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1597,20 +1597,31 @@ static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
        return err;
 }
 
+static int __ethtool_get_module_info(struct net_device *dev,
+                                    struct ethtool_modinfo *modinfo)
+{
+       const struct ethtool_ops *ops = dev->ethtool_ops;
+       struct phy_device *phydev = dev->phydev;
+
+       if (phydev && phydev->drv && phydev->drv->module_info)
+               return phydev->drv->module_info(phydev, modinfo);
+
+       if (ops->get_module_info)
+               return ops->get_module_info(dev, modinfo);
+
+       return -EOPNOTSUPP;
+}
+
 static int ethtool_get_module_info(struct net_device *dev,
                                   void __user *useraddr)
 {
        int ret;
        struct ethtool_modinfo modinfo;
-       const struct ethtool_ops *ops = dev->ethtool_ops;
-
-       if (!ops->get_module_info)
-               return -EOPNOTSUPP;
 
        if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
                return -EFAULT;
 
-       ret = ops->get_module_info(dev, &modinfo);
+       ret = __ethtool_get_module_info(dev, &modinfo);
        if (ret)
                return ret;
 
@@ -1620,21 +1631,33 @@ static int ethtool_get_module_info(struct net_device *dev,
        return 0;
 }
 
+static int __ethtool_get_module_eeprom(struct net_device *dev,
+                                      struct ethtool_eeprom *ee, u8 *data)
+{
+       const struct ethtool_ops *ops = dev->ethtool_ops;
+       struct phy_device *phydev = dev->phydev;
+
+       if (phydev && phydev->drv && phydev->drv->module_eeprom)
+               return phydev->drv->module_eeprom(phydev, ee, data);
+
+       if (ops->get_module_eeprom)
+               return ops->get_module_eeprom(dev, ee, data);
+
+       return -EOPNOTSUPP;
+}
+
 static int ethtool_get_module_eeprom(struct net_device *dev,
                                     void __user *useraddr)
 {
        int ret;
        struct ethtool_modinfo modinfo;
-       const struct ethtool_ops *ops = dev->ethtool_ops;
-
-       if (!ops->get_module_info || !ops->get_module_eeprom)
-               return -EOPNOTSUPP;
 
-       ret = ops->get_module_info(dev, &modinfo);
+       ret = __ethtool_get_module_info(dev, &modinfo);
        if (ret)
                return ret;
 
-       return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
+       return ethtool_get_any_eeprom(dev, useraddr,
+                                     __ethtool_get_module_eeprom,
                                      modinfo.eeprom_len);
 }