[net-next 35/40] ixgbe: disable RSC when Rx checksum is off
From: Jeff Kirsher <hidden>
Date: 2011-06-07 12:33:32
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Emil Tantilov <redacted> Disabling Rx checksumming leads to performance degradation due to RSC causing packets to have incorrect checksums. Signed-off-by: Emil Tantilov <redacted> Tested-by: Evan Swanson <redacted> Signed-off-by: Jeff Kirsher <redacted> --- drivers/net/ixgbe/ixgbe_ethtool.c | 44 +++++++++++++++++++++++++++--------- 1 files changed, 33 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 3dd0f82..f96193d 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c@@ -457,17 +457,6 @@ 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;
@@ -483,6 +472,39 @@ 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;
--
1.7.5.2