netdev - [net-next 2/4] net: ethtool: add the EEE support

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Date:	Tue,  6 Mar 2012 09:28:12 +0100
From:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, bhutchings@...arflare.com,
	rayagond@...avyalabs.com,
	Giuseppe Cavallaro <peppe.cavallaro@...com>
Subject: [net-next 2/4] net: ethtool: add the EEE support

This patch adds two new functions to detect if Energy-Efficient
Ethernet (EEE) is supported and the way to enable/disable it.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
---
 include/linux/ethtool.h |    7 +++++++
 net/core/ethtool.c      |   32 ++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 0 deletions(-)

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index e1d9e0e..8aed0dd 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -48,6 +48,7 @@ struct ethtool_cmd {
 	__u8	eth_tp_mdix;
 	__u8	reserved2;
 	__u32	lp_advertising;	/* Features the link partner advertises */
+	__u32	eee;		/* Energy-Efficient Etehrnet */
 	__u32	reserved[2];
 };
 
@@ -893,6 +894,8 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
  * 		   and flag of the device.
  * @get_dump_data: Get dump data.
  * @set_dump: Set dump specific flags to the device.
+ * @get_eee: Get Energy-Efficient Ethernet (EEE) supported and status.
+ * @set_eee: Set EEE status (enable/disable).
  *
  * All operations are optional (i.e. the function pointer may be set
  * to %NULL) and callers must take this into account.  Callers must
@@ -956,6 +959,8 @@ struct ethtool_ops {
 				 struct ethtool_dump *, void *);
 	int	(*set_dump)(struct net_device *, struct ethtool_dump *);
 
+	int	(*get_eee) (struct net_device *, struct ethtool_value *);
+	int	(*set_eee) (struct net_device *, struct ethtool_value *);
 };
 #endif /* __KERNEL__ */
 
@@ -1029,6 +1034,8 @@ struct ethtool_ops {
 #define ETHTOOL_SET_DUMP	0x0000003e /* Set dump settings */
 #define ETHTOOL_GET_DUMP_FLAG	0x0000003f /* Get dump settings */
 #define ETHTOOL_GET_DUMP_DATA	0x00000040 /* Get dump data */
+#define ETHTOOL_GEEE		0x00000041 /* Get EEE */
+#define ETHTOOL_SEEE		0x00000042 /* Set EEE */
 
 /* compatibility with older code */
 #define SPARC_ETH_GSET		ETHTOOL_GSET
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 6d6d7d2..f47075e 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -716,6 +716,32 @@ static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 	return dev->ethtool_ops->set_wol(dev, &wol);
 }
 
+static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
+{
+	struct ethtool_value edata;
+
+	if (!dev->ethtool_ops->get_eee)
+		return -EOPNOTSUPP;
+
+	dev->ethtool_ops->get_eee(dev, &edata);
+
+	if (copy_to_user(useraddr, &edata, sizeof(edata)))
+		return -EFAULT;
+	return 0;
+}
+
+static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
+{
+	struct ethtool_value edata;
+
+	if (!dev->ethtool_ops->set_eee)
+		return -EOPNOTSUPP;
+
+	if (copy_from_user(&edata, useraddr, sizeof(edata)))
+		return -EFAULT;
+
+	return dev->ethtool_ops->set_eee(dev, &edata);
+}
 static int ethtool_nway_reset(struct net_device *dev)
 {
 	if (!dev->ethtool_ops->nway_reset)
@@ -1370,6 +1396,12 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
 		rc = ethtool_set_value_void(dev, useraddr,
 				       dev->ethtool_ops->set_msglevel);
 		break;
+	case ETHTOOL_GEEE:
+		rc = ethtool_get_eee(dev, useraddr);
+		break;
+	case ETHTOOL_SEEE:
+		rc = ethtool_set_eee(dev, useraddr);
+		break;
 	case ETHTOOL_NWAY_RST:
 		rc = ethtool_nway_reset(dev);
 		break;
-- 
1.7.4.4

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