[netdrvr] add ethtool_ops to struct net_device, and associated infrastructure

Contributed by Matthew Wilcox.

include/linux/ethtool.h

@@ -97,7 +97,7 @@ struct ethtool_coalesce {
 	u32	rx_max_coalesced_frames;
 
 	/* Same as above two parameters, except that these values
-	 * apply while an IRQ is being services by the host.  Not
+	 * apply while an IRQ is being serviced by the host.  Not
 	 * all cards support this feature and the values are ignored
 	 * in that case.
 	 */
@@ -119,7 +119,7 @@ struct ethtool_coalesce {
 	u32	tx_max_coalesced_frames;
 
 	/* Same as above two parameters, except that these values
-	 * apply while an IRQ is being services by the host.  Not
+	 * apply while an IRQ is being serviced by the host.  Not
 	 * all cards support this feature and the values are ignored
 	 * in that case.
 	 */
@@ -250,6 +250,101 @@ struct ethtool_stats {
 	u64	data[0];
 };
 
+struct net_device;
+
+/* Some generic methods drivers may use in their ethtool_ops */
+u32 ethtool_op_get_link(struct net_device *dev);
+u32 ethtool_op_get_tx_csum(struct net_device *dev);
+u32 ethtool_op_get_sg(struct net_device *dev);
+int ethtool_op_set_sg(struct net_device *dev, u32 data);
+
+/**
+ * &ethtool_ops - Alter and report network device settings
+ * get_settings: Get device-specific settings
+ * set_settings: Set device-specific settings
+ * get_drvinfo: Report driver information
+ * get_regs: Get device registers
+ * get_wol: Report whether Wake-on-Lan is enabled
+ * set_wol: Turn Wake-on-Lan on or off
+ * get_msglevel: Report driver message level
+ * set_msglevel: Set driver message level
+ * nway_reset: Restart autonegotiation
+ * get_link: Get link status
+ * get_eeprom: Read data from the device EEPROM
+ * set_eeprom: Write data to the device EEPROM
+ * get_coalesce: Get interrupt coalescing parameters
+ * set_coalesce: Set interrupt coalescing parameters
+ * get_ringparam: Report ring sizes
+ * set_ringparam: Set ring sizes
+ * get_pauseparam: Report pause parameters
+ * set_pauseparam: Set pause paramters
+ * get_rx_csum: Report whether receive checksums are turned on or off
+ * set_rx_csum: Turn receive checksum on or off
+ * get_tx_csum: Report whether transmit checksums are turned on or off
+ * set_tx_csum: Turn transmit checksums on or off
+ * get_sg: Report whether scatter-gather is enabled
+ * set_sg: Turn scatter-gather on or off
+ * self_test: Run specified self-tests
+ * get_strings: Return a set of strings that describe the requested objects 
+ * phys_id: Identify the device
+ * get_stats: Return statistics about the device
+ *
+ * Description:
+ *
+ * get_settings:
+ *	@get_settings is passed an &ethtool_cmd to fill in.  It returns
+ *	an negative errno or zero.
+ *
+ * set_settings:
+ *	@set_settings is passed an &ethtool_cmd and should attempt to set
+ *	all the settings this device supports.  It may return an error value
+ *	if something goes wrong (otherwise 0).
+ *
+ * get_eeprom:
+ *	Should fill in the magic field.  Don't need to check len for zero
+ *	or wraparound but must check offset + len < size.  Fill in the data
+ *	argument with the eeprom values from offset to offset + len.  Update
+ *	len to the amount read.  Returns an error or zero.
+ *
+ * set_eeprom:
+ *	Should validate the magic field.  Don't need to check len for zero
+ *	or wraparound but must check offset + len < size.  Update len to
+ *	the amount written.  Returns an error or zero.
+ */
+struct ethtool_ops {
+	int	(*get_settings)(struct net_device *, struct ethtool_cmd *);
+	int	(*set_settings)(struct net_device *, struct ethtool_cmd *);
+	void	(*get_drvinfo)(struct net_device *, struct ethtool_drvinfo *);
+	int	(*get_regs_len)(struct net_device *);
+	void	(*get_regs)(struct net_device *, struct ethtool_regs *, void *);
+	void	(*get_wol)(struct net_device *, struct ethtool_wolinfo *);
+	int	(*set_wol)(struct net_device *, struct ethtool_wolinfo *);
+	u32	(*get_msglevel)(struct net_device *);
+	void	(*set_msglevel)(struct net_device *, u32);
+	int	(*nway_reset)(struct net_device *);
+	u32	(*get_link)(struct net_device *);
+	int	(*get_eeprom)(struct net_device *, struct ethtool_eeprom *, u8 *);
+	int	(*set_eeprom)(struct net_device *, struct ethtool_eeprom *, u8 *);
+	int	(*get_coalesce)(struct net_device *, struct ethtool_coalesce *);
+	int	(*set_coalesce)(struct net_device *, struct ethtool_coalesce *);
+	void	(*get_ringparam)(struct net_device *, struct ethtool_ringparam *);
+	int	(*set_ringparam)(struct net_device *, struct ethtool_ringparam *);
+	void	(*get_pauseparam)(struct net_device *, struct ethtool_pauseparam*);
+	int	(*set_pauseparam)(struct net_device *, struct ethtool_pauseparam*);
+	u32	(*get_rx_csum)(struct net_device *);
+	int	(*set_rx_csum)(struct net_device *, u32);
+	u32	(*get_tx_csum)(struct net_device *);
+	int	(*set_tx_csum)(struct net_device *, u32);
+	u32	(*get_sg)(struct net_device *);
+	int	(*set_sg)(struct net_device *, u32);
+	int	(*self_test_count)(struct net_device *);
+	void	(*self_test)(struct net_device *, struct ethtool_test *, u64 *);
+	void	(*get_strings)(struct net_device *, u32 stringset, u8 *);
+	int	(*phys_id)(struct net_device *, u32);
+	int	(*get_stats_count)(struct net_device *);
+	void	(*get_ethtool_stats)(struct net_device *, struct ethtool_stats *, u64 *);
+};
+
 /* CMDs currently supported */
 #define ETHTOOL_GSET		0x00000001 /* Get settings. */
 #define ETHTOOL_SSET		0x00000002 /* Set settings. */

include/linux/netdevice.h

@@ -43,6 +43,7 @@
 
 struct divert_blk;
 struct vlan_group;
+struct ethtool_ops;
 
 #define HAVE_ALLOC_NETDEV		/* feature macro: alloc_xxxdev
 					   functions are available. */
@@ -300,6 +301,8 @@ struct net_device
 	 * See <net/iw_handler.h> for details. Jean II */
 	struct iw_handler_def *	wireless_handlers;
 
+	struct ethtool_ops *ethtool_ops;
+
 	/*
 	 * This marks the end of the "visible" part of the structure. All
 	 * fields hereafter are internal to the system, and may change at
@@ -485,7 +488,6 @@ struct packet_type
 	struct list_head	list;
 };
 
-
 #include <linux/interrupt.h>
 #include <linux/notifier.h>
 
@@ -633,6 +635,7 @@ extern int		netif_rx(struct sk_buff *skb);
 #define HAVE_NETIF_RECEIVE_SKB 1
 extern int		netif_receive_skb(struct sk_buff *skb);
 extern int		dev_ioctl(unsigned int cmd, void *);
+extern int		dev_ethtool(struct ifreq *);
 extern unsigned		dev_get_flags(const struct net_device *);
 extern int		dev_change_flags(struct net_device *, unsigned);
 extern int		dev_set_mtu(struct net_device *, int);

net/core/Makefile

@@ -6,8 +6,8 @@ obj-y := sock.o skbuff.o iovec.o datagram.o scm.o
 
 obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
 
-obj-y		     += flow.o dev.o net-sysfs.o dev_mcast.o dst.o neighbour.o \
-			rtnetlink.o utils.o link_watch.o filter.o
+obj-y		     += flow.o dev.o ethtool.o net-sysfs.o dev_mcast.o dst.o \
+			neighbour.o rtnetlink.o utils.o link_watch.o filter.o
 
 obj-$(CONFIG_NETFILTER) += netfilter.o
 obj-$(CONFIG_NET_DIVERT) += dv.o

net/core/dev.c

@@ -2365,7 +2365,6 @@ static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd)
 			    cmd == SIOCBONDSLAVEINFOQUERY ||
 			    cmd == SIOCBONDINFOQUERY ||
 			    cmd == SIOCBONDCHANGEACTIVE ||
-			    cmd == SIOCETHTOOL ||
 			    cmd == SIOCGMIIPHY ||
 			    cmd == SIOCGMIIREG ||
 			    cmd == SIOCSMIIREG ||
@@ -2462,13 +2461,26 @@ int dev_ioctl(unsigned int cmd, void *arg)
 			}
 			return ret;
 
+		case SIOCETHTOOL:
+			dev_load(ifr.ifr_name);
+			rtnl_lock();
+			ret = dev_ethtool(&ifr);
+			rtnl_unlock();
+			if (!ret) {
+				if (colon)
+					*colon = ':';
+				if (copy_to_user(arg, &ifr,
+						 sizeof(struct ifreq)))
+					ret = -EFAULT;
+			}
+			return ret;
+
 		/*
 		 *	These ioctl calls:
 		 *	- require superuser power.
 		 *	- require strict serialization.
 		 *	- return a value
 		 */
-		case SIOCETHTOOL:
 		case SIOCGMIIPHY:
 		case SIOCGMIIREG:
 			if (!capable(CAP_NET_ADMIN))