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Date: Wed, 1 Dec 2010 18:44:57 -0600
From: Jon Mason <jon.mason@...r.com>
To: MichałMirosław <mirq-linux@...e.qmqm.pl>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Ben Hutchings <bhutchings@...arflare.com>,
Jesse Gross <jesse@...ira.com>,
Ramkrishna Vepa <Ramkrishna.Vepa@...r.com>,
Sivakumar Subramani <Sivakumar.Subramani@...r.com>,
Sreenivasa Honnur <Sreenivasa.Honnur@...r.com>
Subject: Re: [PATCH v2] net: Fix too optimistic NETIF_F_HW_CSUM features
On Tue, Nov 30, 2010 at 08:38:00AM -0800, MichałMirosław wrote:
> NETIF_F_HW_CSUM is a superset of NETIF_F_IP_CSUM+NETIF_F_IPV6_CSUM, but
> some drivers miss the difference. Fix this and also fix UFO dependency
> on checksumming offload as it makes the same mistake in assumptions.
>
> Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
The vxge sections look sane to me.
Acked-by: Jon Mason <jon.mason@...r.com>
> ---
>
> Changes from v1:
> - fixed compilation of jme driver
> - enable vxge support for IPv6 checksum
> ---
> drivers/net/vxge/vxge-ethtool.c | 2 +-
> drivers/net/vxge/vxge-main.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
> index 102567e..2754280 100644
> --- a/drivers/net/benet/be_main.c
> +++ b/drivers/net/benet/be_main.c
> @@ -2583,10 +2583,12 @@ static void be_netdev_init(struct net_device *netdev)
> int i;
>
> netdev->features |= NETIF_F_SG | NETIF_F_HW_VLAN_RX | NETIF_F_TSO |
> - NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_FILTER | NETIF_F_HW_CSUM |
> + NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_FILTER |
> + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
> NETIF_F_GRO | NETIF_F_TSO6;
>
> - netdev->vlan_features |= NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
> + netdev->vlan_features |= NETIF_F_SG | NETIF_F_TSO |
> + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>
> if (lancer_chip(adapter))
> netdev->vlan_features |= NETIF_F_TSO6;
> diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c
> index f53edfd..40ce95a 100644
> --- a/drivers/net/bnx2x/bnx2x_main.c
> +++ b/drivers/net/bnx2x/bnx2x_main.c
> @@ -8761,7 +8761,7 @@ static int __devinit bnx2x_init_dev(struct pci_dev *pdev,
> dev->netdev_ops = &bnx2x_netdev_ops;
> bnx2x_set_ethtool_ops(dev);
> dev->features |= NETIF_F_SG;
> - dev->features |= NETIF_F_HW_CSUM;
> + dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
> if (bp->flags & USING_DAC_FLAG)
> dev->features |= NETIF_F_HIGHDMA;
> dev->features |= (NETIF_F_TSO | NETIF_F_TSO_ECN);
> @@ -8769,7 +8769,7 @@ static int __devinit bnx2x_init_dev(struct pci_dev *pdev,
> dev->features |= (NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX);
>
> dev->vlan_features |= NETIF_F_SG;
> - dev->vlan_features |= NETIF_F_HW_CSUM;
> + dev->vlan_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
> if (bp->flags & USING_DAC_FLAG)
> dev->vlan_features |= NETIF_F_HIGHDMA;
> dev->vlan_features |= (NETIF_F_TSO | NETIF_F_TSO_ECN);
> diff --git a/drivers/net/jme.c b/drivers/net/jme.c
> index c57d9a4..2411e72 100644
> --- a/drivers/net/jme.c
> +++ b/drivers/net/jme.c
> @@ -2076,12 +2076,11 @@ jme_change_mtu(struct net_device *netdev, int new_mtu)
> }
>
> if (new_mtu > 1900) {
> - netdev->features &= ~(NETIF_F_HW_CSUM |
> - NETIF_F_TSO |
> - NETIF_F_TSO6);
> + netdev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
> + NETIF_F_TSO | NETIF_F_TSO6);
> } else {
> if (test_bit(JME_FLAG_TXCSUM, &jme->flags))
> - netdev->features |= NETIF_F_HW_CSUM;
> + netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
> if (test_bit(JME_FLAG_TSO, &jme->flags))
> netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
> }
> @@ -2514,10 +2513,12 @@ jme_set_tx_csum(struct net_device *netdev, u32 on)
> if (on) {
> set_bit(JME_FLAG_TXCSUM, &jme->flags);
> if (netdev->mtu <= 1900)
> - netdev->features |= NETIF_F_HW_CSUM;
> + netdev->features |=
> + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
> } else {
> clear_bit(JME_FLAG_TXCSUM, &jme->flags);
> - netdev->features &= ~NETIF_F_HW_CSUM;
> + netdev->features &=
> + ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
> }
>
> return 0;
> @@ -2797,7 +2798,8 @@ jme_init_one(struct pci_dev *pdev,
> netdev->netdev_ops = &jme_netdev_ops;
> netdev->ethtool_ops = &jme_ethtool_ops;
> netdev->watchdog_timeo = TX_TIMEOUT;
> - netdev->features = NETIF_F_HW_CSUM |
> + netdev->features = NETIF_F_IP_CSUM |
> + NETIF_F_IPV6_CSUM |
> NETIF_F_SG |
> NETIF_F_TSO |
> NETIF_F_TSO6 |
> diff --git a/drivers/net/pch_gbe/pch_gbe_ethtool.c b/drivers/net/pch_gbe/pch_gbe_ethtool.c
> index c8cc32c..c8c873b 100644
> --- a/drivers/net/pch_gbe/pch_gbe_ethtool.c
> +++ b/drivers/net/pch_gbe/pch_gbe_ethtool.c
> @@ -469,18 +469,6 @@ static int pch_gbe_set_rx_csum(struct net_device *netdev, u32 data)
> }
>
> /**
> - * pch_gbe_get_tx_csum - Report whether transmit checksums are turned on or off
> - * @netdev: Network interface device structure
> - * Returns
> - * true(1): Checksum On
> - * false(0): Checksum Off
> - */
> -static u32 pch_gbe_get_tx_csum(struct net_device *netdev)
> -{
> - return (netdev->features & NETIF_F_HW_CSUM) != 0;
> -}
> -
> -/**
> * pch_gbe_set_tx_csum - Turn transmit checksums on or off
> * @netdev: Network interface device structure
> * @data: Checksum on[true] or off[false]
> @@ -493,11 +481,7 @@ static int pch_gbe_set_tx_csum(struct net_device *netdev, u32 data)
> struct pch_gbe_adapter *adapter = netdev_priv(netdev);
>
> adapter->tx_csum = data;
> - if (data)
> - netdev->features |= NETIF_F_HW_CSUM;
> - else
> - netdev->features &= ~NETIF_F_HW_CSUM;
> - return 0;
> + return ethtool_op_set_tx_ipv6_csum(netdev, data);
> }
>
> /**
> @@ -572,7 +556,6 @@ static const struct ethtool_ops pch_gbe_ethtool_ops = {
> .set_pauseparam = pch_gbe_set_pauseparam,
> .get_rx_csum = pch_gbe_get_rx_csum,
> .set_rx_csum = pch_gbe_set_rx_csum,
> - .get_tx_csum = pch_gbe_get_tx_csum,
> .set_tx_csum = pch_gbe_set_tx_csum,
> .get_strings = pch_gbe_get_strings,
> .get_ethtool_stats = pch_gbe_get_ethtool_stats,
> diff --git a/drivers/net/pch_gbe/pch_gbe_main.c b/drivers/net/pch_gbe/pch_gbe_main.c
> index afb7506..58e7903 100644
> --- a/drivers/net/pch_gbe/pch_gbe_main.c
> +++ b/drivers/net/pch_gbe/pch_gbe_main.c
> @@ -2319,7 +2319,7 @@ static int pch_gbe_probe(struct pci_dev *pdev,
> netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
> netif_napi_add(netdev, &adapter->napi,
> pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
> - netdev->features = NETIF_F_HW_CSUM | NETIF_F_GRO;
> + netdev->features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_GRO;
> pch_gbe_set_ethtool_ops(netdev);
>
> pch_gbe_mac_reset_hw(&adapter->hw);
> @@ -2358,9 +2358,9 @@ static int pch_gbe_probe(struct pci_dev *pdev,
> pch_gbe_check_options(adapter);
>
> if (adapter->tx_csum)
> - netdev->features |= NETIF_F_HW_CSUM;
> + netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
> else
> - netdev->features &= ~NETIF_F_HW_CSUM;
> + netdev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
>
> /* initialize the wol settings based on the eeprom settings */
> adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
> diff --git a/drivers/net/sc92031.c b/drivers/net/sc92031.c
> index 417adf3..76290a8 100644
> --- a/drivers/net/sc92031.c
> +++ b/drivers/net/sc92031.c
> @@ -1449,7 +1449,8 @@ static int __devinit sc92031_probe(struct pci_dev *pdev,
> dev->irq = pdev->irq;
>
> /* faked with skb_copy_and_csum_dev */
> - dev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
> + dev->features = NETIF_F_SG | NETIF_F_HIGHDMA |
> + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>
> dev->netdev_ops = &sc92031_netdev_ops;
> dev->watchdog_timeo = TX_TIMEOUT;
> diff --git a/drivers/net/stmmac/stmmac_ethtool.c b/drivers/net/stmmac/stmmac_ethtool.c
> index f2695fd..fd719ed 100644
> --- a/drivers/net/stmmac/stmmac_ethtool.c
> +++ b/drivers/net/stmmac/stmmac_ethtool.c
> @@ -197,16 +197,6 @@ static void stmmac_ethtool_gregs(struct net_device *dev,
> }
> }
>
> -static int stmmac_ethtool_set_tx_csum(struct net_device *netdev, u32 data)
> -{
> - if (data)
> - netdev->features |= NETIF_F_HW_CSUM;
> - else
> - netdev->features &= ~NETIF_F_HW_CSUM;
> -
> - return 0;
> -}
> -
> static u32 stmmac_ethtool_get_rx_csum(struct net_device *dev)
> {
> struct stmmac_priv *priv = netdev_priv(dev);
> @@ -370,7 +360,7 @@ static struct ethtool_ops stmmac_ethtool_ops = {
> .get_link = ethtool_op_get_link,
> .get_rx_csum = stmmac_ethtool_get_rx_csum,
> .get_tx_csum = ethtool_op_get_tx_csum,
> - .set_tx_csum = stmmac_ethtool_set_tx_csum,
> + .set_tx_csum = ethtool_op_set_tx_ipv6_csum,
> .get_sg = ethtool_op_get_sg,
> .set_sg = ethtool_op_set_sg,
> .get_pauseparam = stmmac_get_pauseparam,
> diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
> index 730a6fd..bfc2d12 100644
> --- a/drivers/net/stmmac/stmmac_main.c
> +++ b/drivers/net/stmmac/stmmac_main.c
> @@ -1494,7 +1494,8 @@ static int stmmac_probe(struct net_device *dev)
> dev->netdev_ops = &stmmac_netdev_ops;
> stmmac_set_ethtool_ops(dev);
>
> - dev->features |= (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA);
> + dev->features |= NETIF_F_SG | NETIF_F_HIGHDMA |
> + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
> dev->watchdog_timeo = msecs_to_jiffies(watchdog);
> #ifdef STMMAC_VLAN_TAG_USED
> /* Both mac100 and gmac support receive VLAN tag detection */
> @@ -1525,7 +1526,7 @@ static int stmmac_probe(struct net_device *dev)
>
> DBG(probe, DEBUG, "%s: Scatter/Gather: %s - HW checksums: %s\n",
> dev->name, (dev->features & NETIF_F_SG) ? "on" : "off",
> - (dev->features & NETIF_F_HW_CSUM) ? "on" : "off");
> + (dev->features & NETIF_F_IP_CSUM) ? "on" : "off");
>
> spin_lock_init(&priv->lock);
>
> diff --git a/drivers/net/vxge/vxge-ethtool.c b/drivers/net/vxge/vxge-ethtool.c
> index bc9bd10..1dd3a21 100644
> --- a/drivers/net/vxge/vxge-ethtool.c
> +++ b/drivers/net/vxge/vxge-ethtool.c
> @@ -1177,7 +1177,7 @@ static const struct ethtool_ops vxge_ethtool_ops = {
> .get_rx_csum = vxge_get_rx_csum,
> .set_rx_csum = vxge_set_rx_csum,
> .get_tx_csum = ethtool_op_get_tx_csum,
> - .set_tx_csum = ethtool_op_set_tx_hw_csum,
> + .set_tx_csum = ethtool_op_set_tx_ipv6_csum,
> .get_sg = ethtool_op_get_sg,
> .set_sg = ethtool_op_set_sg,
> .get_tso = ethtool_op_get_tso,
> diff --git a/drivers/net/vxge/vxge-main.c b/drivers/net/vxge/vxge-main.c
> index a21dae1..d339f5b 100644
> --- a/drivers/net/vxge/vxge-main.c
> +++ b/drivers/net/vxge/vxge-main.c
> @@ -3368,7 +3368,7 @@ static int __devinit vxge_device_register(struct __vxge_hw_device *hldev,
>
> ndev->features |= NETIF_F_SG;
>
> - ndev->features |= NETIF_F_HW_CSUM;
> + ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
> vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
> "%s : checksuming enabled", __func__);
>
> diff --git a/net/core/dev.c b/net/core/dev.c
> index 3259d2c..622f85a 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -5041,10 +5041,13 @@ unsigned long netdev_fix_features(unsigned long features, const char *name)
> }
>
> if (features & NETIF_F_UFO) {
> - if (!(features & NETIF_F_GEN_CSUM)) {
> + /* maybe split UFO into V4 and V6? */
> + if (!((features & NETIF_F_GEN_CSUM) ||
> + (features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
> + == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
> if (name)
> printk(KERN_ERR "%s: Dropping NETIF_F_UFO "
> - "since no NETIF_F_HW_CSUM feature.\n",
> + "since no checksum offload features.\n",
> name);
> features &= ~NETIF_F_UFO;
> }
> diff --git a/net/core/ethtool.c b/net/core/ethtool.c
> index 956a9f4..d5bc2881 100644
> --- a/net/core/ethtool.c
> +++ b/net/core/ethtool.c
> @@ -1171,7 +1171,9 @@ static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
> return -EFAULT;
> if (edata.data && !(dev->features & NETIF_F_SG))
> return -EINVAL;
> - if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
> + if (edata.data && !((dev->features & NETIF_F_GEN_CSUM) ||
> + (dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
> + == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
> return -EINVAL;
> return dev->ethtool_ops->set_ufo(dev, edata.data);
> }
>
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