enic: Add tunable_ops support for rx_copybreak

This patch adds support for setting/getting rx_copybreak using
generic ethtool tunable.

Defines enic_get_tunable() & enic_set_tunable() to get/set rx_copybreak.
As of now, these two function supports only rx_copybreak.

Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
index 523c9ceb04c0..85173d620758 100644
--- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c
+++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
@@ -379,6 +379,43 @@ static int enic_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
         return ret;
 }
 
+static int enic_get_tunable(struct net_device *dev,
+                            const struct ethtool_tunable *tuna, void *data)
+{
+        struct enic *enic = netdev_priv(dev);
+        int ret = 0;
+
+        switch (tuna->id) {
+        case ETHTOOL_RX_COPYBREAK:
+                *(u32 *)data = enic->rx_copybreak;
+                break;
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        return ret;
+}
+
+static int enic_set_tunable(struct net_device *dev,
+                            const struct ethtool_tunable *tuna,
+                            const void *data)
+{
+        struct enic *enic = netdev_priv(dev);
+        int ret = 0;
+
+        switch (tuna->id) {
+        case ETHTOOL_RX_COPYBREAK:
+                enic->rx_copybreak = *(u32 *)data;
+                break;
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        return ret;
+}
+
 static const struct ethtool_ops enic_ethtool_ops = {
         .get_settings = enic_get_settings,
         .get_drvinfo = enic_get_drvinfo,
@@ -391,6 +428,8 @@ static const struct ethtool_ops enic_ethtool_ops = {
         .get_coalesce = enic_get_coalesce,
         .set_coalesce = enic_set_coalesce,
         .get_rxnfc = enic_get_rxnfc,
+        .get_tunable = enic_get_tunable,
+        .set_tunable = enic_set_tunable,
 };
 
 void enic_set_ethtool_ops(struct net_device *netdev)