e1000e: Expose MDI-X status via ethtool change

Ethtool is a standard way of getting information about
ethernet interfaces.  We enhance ethtool kernel interface
& e1000e to make the MDI-X status readable via ethtool in
userspace.

Signed-off-by: Chaitanya Lala <clala@riverbed.com>
Signed-off-by: Arthur Jones <ajones@riverbed.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index 3d6435617527a64bb9bc03fd85475185ac5ce140..1bf4d2a5d34f8b7421839033c7dd4cedb748bc1c 100644 (file)
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -167,6 +167,15 @@ static int e1000_get_settings(struct net_device *netdev,
 
        ecmd->autoneg = ((hw->phy.media_type == e1000_media_type_fiber) ||
                         hw->mac.autoneg) ? AUTONEG_ENABLE : AUTONEG_DISABLE;
+
+       /* MDI-X => 2; MDI =>1; Invalid =>0 */
+       if ((hw->phy.media_type == e1000_media_type_copper) &&
+           !hw->mac.get_link_status)
+               ecmd->eth_tp_mdix = hw->phy.is_mdix ? ETH_TP_MDI_X :
+                                                     ETH_TP_MDI;
+       else
+               ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;
+
        return 0;
 }
 

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 380b04272bf112da520e09844f75e185b5da4365..9b660bd2e2b37db4a955d02e02929db4531b7ded 100644 (file)
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -30,7 +30,8 @@ struct ethtool_cmd {
        __u32   maxtxpkt;       /* Tx pkts before generating tx int */
        __u32   maxrxpkt;       /* Rx pkts before generating rx int */
        __u16   speed_hi;
-       __u16   reserved2;
+       __u8    eth_tp_mdix;
+       __u8    reserved2;
        __u32   lp_advertising; /* Features the link partner advertises */
        __u32   reserved[2];
 };
@@ -632,6 +633,11 @@ struct ethtool_ops {
 #define AUTONEG_DISABLE                0x00
 #define AUTONEG_ENABLE         0x01
 
+/* Mode MDI or MDI-X */
+#define ETH_TP_MDI_INVALID     0x00
+#define ETH_TP_MDI             0x01
+#define ETH_TP_MDI_X           0x02
+
 /* Wake-On-Lan options. */
 #define WAKE_PHY               (1 << 0)
 #define WAKE_UCAST             (1 << 1)