e1000: FIX: enable hw TSO for IPV6

Enable TSO for IPV6. All e1000 hardware supports it. This reduces CPU
utilizations by 50% when transmitting IPv6 frames.

Fix symbol naming enabling ipv6 TSO. Turn off TSO6 for 10/100.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>

3 files changed, 24 insertions, 5 deletions

diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index 7ecce438d258..3f0be02e85e2 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -59,6 +59,9 @@
 #include <linux/capability.h>
 #include <linux/in.h>
 #include <linux/ip.h>
+#ifdef NETIF_F_TSO6
+#include <linux/ipv6.h>
+#endif
 #include <linux/tcp.h>
 #include <linux/udp.h>
 #include <net/pkt_sched.h>
diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index 82d2c78e1696..b9c0927d79b3 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -348,6 +348,13 @@ e1000_set_tso(struct net_device *netdev, uint32_t data)
         else
                 netdev->features &= ~NETIF_F_TSO;
 
+#ifdef NETIF_F_TSO6
+        if (data)
+                netdev->features |= NETIF_F_TSO6;
+        else
+                netdev->features &= ~NETIF_F_TSO6;
+#endif
+
         DPRINTK(PROBE, INFO, "TSO is %s\n", data ? "Enabled" : "Disabled");
         adapter->tso_force = TRUE;
         return 0;
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 35d6d080522f..38ee39e570ea 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -844,9 +844,9 @@ e1000_probe(struct pci_dev *pdev,
            (adapter->hw.mac_type != e1000_82547))
                 netdev->features |= NETIF_F_TSO;
 
-#ifdef NETIF_F_TSO_IPV6
+#ifdef NETIF_F_TSO6
         if (adapter->hw.mac_type > e1000_82547_rev_2)
-                netdev->features |= NETIF_F_TSO_IPV6;
+                netdev->features |= NETIF_F_TSO6;
 #endif
 #endif
         if (pci_using_dac)
@@ -1814,8 +1814,11 @@ e1000_setup_rctl(struct e1000_adapter *adapter)
                 /* Configure extra packet-split registers */
                 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
                 rfctl |= E1000_RFCTL_EXTEN;
-                /* disable IPv6 packet split support */
-                rfctl |= E1000_RFCTL_IPV6_DIS;
+                /* disable packet split support for IPv6 extension headers,
+                 * because some malformed IPv6 headers can hang the RX */
+                rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
+                          E1000_RFCTL_NEW_IPV6_EXT_DIS);
+
                 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
 
                 rctl |= E1000_RCTL_DTYP_PS;
@@ -2473,9 +2476,15 @@ e1000_watchdog(unsigned long data)
                                         DPRINTK(PROBE,INFO,
                                         "10/100 speed: disabling TSO\n");
                                         netdev->features &= ~NETIF_F_TSO;
+#ifdef NETIF_F_TSO6
+                                        netdev->features &= ~NETIF_F_TSO6;
+#endif
                                         break;
                                 case SPEED_1000:
                                         netdev->features |= NETIF_F_TSO;
+#ifdef NETIF_F_TSO6
+                                        netdev->features |= NETIF_F_TSO6;
+#endif
                                         break;
                                 default:
                                         /* oops */
@@ -2610,7 +2619,7 @@ e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
                                                    0);
                         cmd_length = E1000_TXD_CMD_IP;
                         ipcse = skb->h.raw - skb->data - 1;
-#ifdef NETIF_F_TSO_IPV6
+#ifdef NETIF_F_TSO6
                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
                         skb->nh.ipv6h->payload_len = 0;
                         skb->h.th->check =