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ixgbe: disable RSC when Rx checksum is off

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Disabling Rx checksumming leads to performance degradation due to
RSC causing packets to have incorrect checksums.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Evan Swanson <evan.swanson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Emil Tantilov 2011-05-13 02:22:50 +00:00 • committed by Jeff Kirsher
parent c988ee8290
commit 2ba279e2f7
1 changed files with 33 additions and 11 deletions
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44
drivers/net/ixgbe/ixgbe_ethtool.c
View file

@ -458,17 +458,6 @@ static u32 ixgbe_get_rx_csum(struct net_device *netdev)
return adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED;
}
static int ixgbe_set_rx_csum(struct net_device *netdev, u32 data)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
if (data)
adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
else
adapter->flags &= ~IXGBE_FLAG_RX_CSUM_ENABLED;
return 0;
}
static void ixgbe_set_rsc(struct ixgbe_adapter *adapter)
{
int i;
@ -484,6 +473,39 @@ static void ixgbe_set_rsc(struct ixgbe_adapter *adapter)
}
}
static int ixgbe_set_rx_csum(struct net_device *netdev, u32 data)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
bool need_reset = false;
if (data) {
adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
} else {
adapter->flags &= ~IXGBE_FLAG_RX_CSUM_ENABLED;
if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) {
adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
netdev->features &= ~NETIF_F_LRO;
}
switch (adapter->hw.mac.type) {
case ixgbe_mac_X540:
ixgbe_set_rsc(adapter);
break;
case ixgbe_mac_82599EB:
need_reset = true;
break;
default:
break;
}
}
if (need_reset)
ixgbe_do_reset(netdev);
return 0;
}
static u32 ixgbe_get_tx_csum(struct net_device *netdev)
{
return (netdev->features & NETIF_F_IP_CSUM) != 0;