[NET]: Add ethtool support for NETIF_F_IPV6_CSUM devices.

Add ethtool utility function to set or clear IPV6_CSUM feature flag.
Modify tg3.c and bnx2.c to use this function when doing ethtool -K
to change tx checksum.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 15 insertions, 2 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 4e5e1cb2adc1..d23861c8658c 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -6218,7 +6218,7 @@ bnx2_set_tx_csum(struct net_device *dev, u32 data)
         struct bnx2 *bp = netdev_priv(dev);
 
         if (CHIP_NUM(bp) == CHIP_NUM_5709)
-                return (ethtool_op_set_tx_hw_csum(dev, data));
+                return (ethtool_op_set_tx_ipv6_csum(dev, data));
         else
                 return (ethtool_op_set_tx_csum(dev, data));
 }
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 32e4037dcb50..5ee14764fd74 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8318,7 +8318,7 @@ static int tg3_set_tx_csum(struct net_device *dev, u32 data)
 
         if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5755 ||
             GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5787)
-                ethtool_op_set_tx_hw_csum(dev, data);
+                ethtool_op_set_tx_ipv6_csum(dev, data);
         else
                 ethtool_op_set_tx_csum(dev, data);
 
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index f2d248f8cc92..3a632244f31b 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -265,6 +265,7 @@ u32 ethtool_op_get_link(struct net_device *dev);
 u32 ethtool_op_get_tx_csum(struct net_device *dev);
 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data);
 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data);
+int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data);
 u32 ethtool_op_get_sg(struct net_device *dev);
 int ethtool_op_set_sg(struct net_device *dev, u32 data);
 u32 ethtool_op_get_tso(struct net_device *dev);
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 8d5e5a09b576..0b531e98ec33 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -52,6 +52,17 @@ int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
 
         return 0;
 }
+
+int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
+{
+        if (data)
+                dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
+        else
+                dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
+
+        return 0;
+}
+
 u32 ethtool_op_get_sg(struct net_device *dev)
 {
         return (dev->features & NETIF_F_SG) != 0;
@@ -980,5 +991,6 @@ EXPORT_SYMBOL(ethtool_op_set_sg);
 EXPORT_SYMBOL(ethtool_op_set_tso);
 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
+EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
 EXPORT_SYMBOL(ethtool_op_set_ufo);
 EXPORT_SYMBOL(ethtool_op_get_ufo);