commit 40ca1988e03c001747d0b4cc1b25cf38297c9f9e
author Eli Cohen <eli@dev.mellanox.co.il> Wed Apr 16 21:09:27 2008 -0700
committer Roland Dreier <rolandd@cisco.com> Wed Apr 16 21:09:27 2008 -0700
tree 5eb1d1e32b41409bd722df9c80deb326a227b09f
parent c93570f23a98c633570397aedc6d1808f5d5846a

IPoIB: Add LSO support

For HCAs that support TCP segmentation offload (IB_DEVICE_UD_TSO), set
NETIF_F_TSO and use HW LSO to offload TCP segmentation.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/ulp/ipoib/ipoib_cm.c

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index edf63dc..9d411f2 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -1384,7 +1384,7 @@
 		ipoib_warn(priv, "enabling connected mode "
 			   "will cause multicast packet drops\n");
 
-		dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG);
+		dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO);
 		priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
 
 		ipoib_flush_paths(dev);
@@ -1396,8 +1396,11 @@
 		dev->mtu = min(priv->mcast_mtu, dev->mtu);
 		ipoib_flush_paths(dev);
 
-		if (test_bit(IPOIB_FLAG_CSUM, &priv->flags))
+		if (test_bit(IPOIB_FLAG_CSUM, &priv->flags)) {
 			dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
+			if (priv->hca_caps & IB_DEVICE_UD_TSO)
+				dev->features |= NETIF_F_TSO;
+		}
 
 		return count;
 	}