IPoIB: Allow disabling/enabling TSO on the fly through ethtool

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c b/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c
index d10b4ec68d28..40e858492f90 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ethtool.c
@@ -49,6 +49,25 @@ static u32 ipoib_get_rx_csum(struct net_device *dev)
                 !test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
 }
 
+static int ipoib_set_tso(struct net_device *dev, u32 data)
+{
+        struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+        if (data) {
+                if (!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
+                    (dev->features & NETIF_F_SG) &&
+                    (priv->hca_caps & IB_DEVICE_UD_TSO)) {
+                        dev->features |= NETIF_F_TSO;
+                } else {
+                        ipoib_warn(priv, "can't set TSO on\n");
+                        return -EOPNOTSUPP;
+                }
+        } else
+                dev->features &= ~NETIF_F_TSO;
+
+        return 0;
+}
+
 static int ipoib_get_coalesce(struct net_device *dev,
                               struct ethtool_coalesce *coal)
 {
@@ -131,6 +150,7 @@ static void ipoib_get_ethtool_stats(struct net_device *dev,
 static const struct ethtool_ops ipoib_ethtool_ops = {
         .get_drvinfo            = ipoib_get_drvinfo,
         .get_rx_csum            = ipoib_get_rx_csum,
+        .set_tso                = ipoib_set_tso,
         .get_coalesce           = ipoib_get_coalesce,
         .set_coalesce           = ipoib_set_coalesce,
         .get_flags              = ethtool_op_get_flags,