[PATCH] More ethtool support for sis900 and warning fix

  
  Add support to sis900 for the following ethtool ops:
        - get_link
        - get_settings
        - set_settings
        - nway_reset
Signed-off-by: Daniele Venzano <webvenza@libero.it>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

drivers/net/sis900.c

@@ -162,6 +162,7 @@ struct sis900_private {
 	struct mii_phy * mii;
 	struct mii_phy * first_mii; /* record the first mii structure */
 	unsigned int cur_phy;
+	struct mii_if_info mii_info;
 
 	struct timer_list timer; /* Link status detection timer. */
 	u8 autong_complete; /* 1: auto-negotiate complete  */
@@ -203,7 +204,7 @@ static int sis900_open(struct net_device *net_dev);
 static int sis900_mii_probe (struct net_device * net_dev);
 static void sis900_init_rxfilter (struct net_device * net_dev);
 static u16 read_eeprom(long ioaddr, int location);
-static u16 mdio_read(struct net_device *net_dev, int phy_id, int location);
+static int mdio_read(struct net_device *net_dev, int phy_id, int location);
 static void mdio_write(struct net_device *net_dev, int phy_id, int location, int val);
 static void sis900_timer(unsigned long data);
 static void sis900_check_mode (struct net_device *net_dev, struct mii_phy *mii_phy);
@@ -479,6 +480,12 @@ static int __devinit sis900_probe(struct pci_dev *pci_dev,
 	else
 		sis_priv->msg_enable = SIS900_DEF_MSG;
 
+	sis_priv->mii_info.dev = net_dev;
+	sis_priv->mii_info.mdio_read = mdio_read;
+	sis_priv->mii_info.mdio_write = mdio_write;
+	sis_priv->mii_info.phy_id_mask = 0x1f;
+	sis_priv->mii_info.reg_num_mask = 0x1f;
+
 	/* Get Mac address according to the chip revision */
 	pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &(sis_priv->chipset_rev));
 	if(netif_msg_probe(sis_priv))
@@ -725,6 +732,8 @@ static u16 sis900_default_phy(struct net_device * net_dev)
 		       pci_name(sis_priv->pci_dev), sis_priv->cur_phy);
 	}
 	
+	sis_priv->mii_info.phy_id = sis_priv->cur_phy;
+
 	status = mdio_read(net_dev, sis_priv->cur_phy, MII_CONTROL);
 	status &= (~MII_CNTL_ISOLATE);
 
@@ -852,7 +861,7 @@ static void mdio_reset(long mdio_addr)
  *	Please see SiS7014 or ICS spec
  */
 
-static u16 mdio_read(struct net_device *net_dev, int phy_id, int location)
+static int mdio_read(struct net_device *net_dev, int phy_id, int location)
 {
 	long mdio_addr = net_dev->base_addr + mear;
 	int mii_cmd = MIIread|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
@@ -1966,10 +1975,47 @@ static void sis900_set_msglevel(struct net_device *net_dev, u32 value)
 	sis_priv->msg_enable = value;
 }
 
+static u32 sis900_get_link(struct net_device *net_dev)
+{
+	struct sis900_private *sis_priv = net_dev->priv;
+	return mii_link_ok(&sis_priv->mii_info);
+}
+
+static int sis900_get_settings(struct net_device *net_dev,
+				struct ethtool_cmd *cmd)
+{
+	struct sis900_private *sis_priv = net_dev->priv;
+	spin_lock_irq(&sis_priv->lock);
+	mii_ethtool_gset(&sis_priv->mii_info, cmd);
+	spin_unlock_irq(&sis_priv->lock);
+	return 0;
+}
+
+static int sis900_set_settings(struct net_device *net_dev,
+				struct ethtool_cmd *cmd)
+{
+	struct sis900_private *sis_priv = net_dev->priv;
+	int rt;
+	spin_lock_irq(&sis_priv->lock);
+	rt = mii_ethtool_sset(&sis_priv->mii_info, cmd);
+	spin_unlock_irq(&sis_priv->lock);
+	return rt;
+}
+
+static int sis900_nway_reset(struct net_device *net_dev)
+{
+	struct sis900_private *sis_priv = net_dev->priv;
+	return mii_nway_restart(&sis_priv->mii_info);
+}
+
 static struct ethtool_ops sis900_ethtool_ops = {
 	.get_drvinfo 	= sis900_get_drvinfo,
 	.get_msglevel	= sis900_get_msglevel,
 	.set_msglevel	= sis900_set_msglevel,
+	.get_link	= sis900_get_link,
+	.get_settings	= sis900_get_settings,
+	.set_settings	= sis900_set_settings,
+	.nway_reset	= sis900_nway_reset,
 };
 
 /**