From 34324dc2bf27c1773045fea63cb11f7e2a6ad2b9 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Tue, 15 Nov 2011 15:29:55 +0000 Subject: [PATCH] net: remove NETIF_F_NO_CSUM feature bit MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Only distinct use is checking if NETIF_F_NOCACHE_COPY should be enabled by default. The check heuristics is altered a bit here, so it hits other people than before. The default shouldn't be trusted for performance-critical cases anyway. For all other uses NETIF_F_NO_CSUM is equivalent to NETIF_F_HW_CSUM. Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- drivers/ieee802154/fakehard.c | 2 +- drivers/misc/sgi-xp/xpnet.c | 2 +- drivers/net/bonding/bond_main.c | 2 +- drivers/net/can/dev.c | 2 +- drivers/net/can/slcan.c | 2 +- drivers/net/dummy.c | 2 +- drivers/net/ifb.c | 2 +- drivers/net/loopback.c | 2 +- drivers/net/veth.c | 2 +- include/linux/netdev_features.h | 5 ++--- include/linux/skbuff.h | 1 - net/bridge/br_device.c | 4 ++-- net/core/dev.c | 21 ++++++--------------- net/core/ethtool.c | 1 - 14 files changed, 19 insertions(+), 31 deletions(-) diff --git a/drivers/ieee802154/fakehard.c b/drivers/ieee802154/fakehard.c index eb0e2ccc79ae..73d453159408 100644 --- a/drivers/ieee802154/fakehard.c +++ b/drivers/ieee802154/fakehard.c @@ -343,7 +343,7 @@ static void ieee802154_fake_setup(struct net_device *dev) { dev->addr_len = IEEE802154_ADDR_LEN; memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); - dev->features = NETIF_F_NO_CSUM; + dev->features = NETIF_F_HW_CSUM; dev->needed_tailroom = 2; /* FCS */ dev->mtu = 127; dev->tx_queue_len = 10; diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c index 42f067347bc7..3fac67a5204c 100644 --- a/drivers/misc/sgi-xp/xpnet.c +++ b/drivers/misc/sgi-xp/xpnet.c @@ -576,7 +576,7 @@ xpnet_init(void) * report an error if the data is not retrievable and the * packet will be dropped. */ - xpnet_device->features = NETIF_F_NO_CSUM; + xpnet_device->features = NETIF_F_HW_CSUM; result = register_netdev(xpnet_device); if (result != 0) { diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index ac5337a04639..25a44d94be17 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -4361,7 +4361,7 @@ static void bond_setup(struct net_device *bond_dev) NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER; - bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_NO_CSUM); + bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM); bond_dev->features |= bond_dev->hw_features; } diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 25695bde0549..120f1ab5a2ce 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -454,7 +454,7 @@ static void can_setup(struct net_device *dev) /* New-style flags. */ dev->flags = IFF_NOARP; - dev->features = NETIF_F_NO_CSUM; + dev->features = NETIF_F_HW_CSUM; } struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf) diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c index a979b006f459..3f1ebcc2cb83 100644 --- a/drivers/net/can/slcan.c +++ b/drivers/net/can/slcan.c @@ -387,7 +387,7 @@ static void slc_setup(struct net_device *dev) /* New-style flags. */ dev->flags = IFF_NOARP; - dev->features = NETIF_F_NO_CSUM; + dev->features = NETIF_F_HW_CSUM; } /****************************************** diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c index a7c5e8831e8c..087648ea1edb 100644 --- a/drivers/net/dummy.c +++ b/drivers/net/dummy.c @@ -134,7 +134,7 @@ static void dummy_setup(struct net_device *dev) dev->flags |= IFF_NOARP; dev->flags &= ~IFF_MULTICAST; dev->features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO; - dev->features |= NETIF_F_NO_CSUM | NETIF_F_HIGHDMA | NETIF_F_LLTX; + dev->features |= NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_LLTX; random_ether_addr(dev->dev_addr); } diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c index 46b5f5fd686b..e05b645bbc32 100644 --- a/drivers/net/ifb.c +++ b/drivers/net/ifb.c @@ -164,7 +164,7 @@ static const struct net_device_ops ifb_netdev_ops = { .ndo_validate_addr = eth_validate_addr, }; -#define IFB_FEATURES (NETIF_F_NO_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST | \ +#define IFB_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST | \ NETIF_F_TSO_ECN | NETIF_F_TSO | NETIF_F_TSO6 | \ NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_TX) diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index 4ce9e5f2c069..b71998d0b5b4 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -169,7 +169,7 @@ static void loopback_setup(struct net_device *dev) dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | NETIF_F_UFO - | NETIF_F_NO_CSUM + | NETIF_F_HW_CSUM | NETIF_F_RXCSUM | NETIF_F_HIGHDMA | NETIF_F_LLTX diff --git a/drivers/net/veth.c b/drivers/net/veth.c index d32a75fb6d21..b576812bdc59 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -271,7 +271,7 @@ static void veth_setup(struct net_device *dev) dev->features |= NETIF_F_LLTX; dev->destructor = veth_dev_free; - dev->hw_features = NETIF_F_NO_CSUM | NETIF_F_SG | NETIF_F_RXCSUM; + dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_RXCSUM; } /* diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h index 20e3a1f9892d..77f5202977ce 100644 --- a/include/linux/netdev_features.h +++ b/include/linux/netdev_features.h @@ -17,7 +17,7 @@ typedef u64 netdev_features_t; enum { NETIF_F_SG_BIT, /* Scatter/gather IO. */ NETIF_F_IP_CSUM_BIT, /* Can checksum TCP/UDP over IPv4. */ - NETIF_F_NO_CSUM_BIT, /* Does not require checksum. F.e. loopack. */ + __UNUSED_NETIF_F_1, NETIF_F_HW_CSUM_BIT, /* Can checksum all the packets. */ NETIF_F_IPV6_CSUM_BIT, /* Can checksum TCP/UDP over IPV6 */ NETIF_F_HIGHDMA_BIT, /* Can DMA to high memory. */ @@ -88,7 +88,6 @@ enum { #define NETIF_F_LRO __NETIF_F(LRO) #define NETIF_F_NETNS_LOCAL __NETIF_F(NETNS_LOCAL) #define NETIF_F_NOCACHE_COPY __NETIF_F(NOCACHE_COPY) -#define NETIF_F_NO_CSUM __NETIF_F(NO_CSUM) #define NETIF_F_NTUPLE __NETIF_F(NTUPLE) #define NETIF_F_RXCSUM __NETIF_F(RXCSUM) #define NETIF_F_RXHASH __NETIF_F(RXHASH) @@ -118,7 +117,7 @@ enum { #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \ NETIF_F_TSO6 | NETIF_F_UFO) -#define NETIF_F_GEN_CSUM (NETIF_F_HW_CSUM | NETIF_F_NO_CSUM) +#define NETIF_F_GEN_CSUM NETIF_F_HW_CSUM #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index a10e487c0864..b93117389cfe 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -88,7 +88,6 @@ * at device setup time. * NETIF_F_HW_CSUM - it is clever device, it is able to checksum * everything. - * NETIF_F_NO_CSUM - loopback or reliable single hop media. * NETIF_F_IP_CSUM - device is dumb. It is able to csum only * TCP/UDP over IPv4. Sigh. Vendors like this * way by an unknown reason. Though, see comment above diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 772bad34794c..a3754ac262c3 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -342,10 +342,10 @@ void br_dev_setup(struct net_device *dev) dev->priv_flags = IFF_EBRIDGE; dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | - NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX | + NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL | NETIF_F_HW_VLAN_TX; dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | - NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | + NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_TX; br->dev = dev; diff --git a/net/core/dev.c b/net/core/dev.c index f1cca59c4638..26c49d55e79d 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5362,12 +5362,6 @@ static netdev_features_t netdev_fix_features(struct net_device *dev, features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); } - if ((features & NETIF_F_NO_CSUM) && - (features & (NETIF_F_HW_CSUM|NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) { - netdev_warn(dev, "mixed no checksumming and other settings.\n"); - features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM|NETIF_F_HW_CSUM); - } - /* Fix illegal SG+CSUM combinations. */ if ((features & NETIF_F_SG) && !(features & NETIF_F_ALL_CSUM)) { @@ -5624,11 +5618,12 @@ int register_netdevice(struct net_device *dev) dev->wanted_features = dev->features & dev->hw_features; /* Turn on no cache copy if HW is doing checksum */ - dev->hw_features |= NETIF_F_NOCACHE_COPY; - if ((dev->features & NETIF_F_ALL_CSUM) && - !(dev->features & NETIF_F_NO_CSUM)) { - dev->wanted_features |= NETIF_F_NOCACHE_COPY; - dev->features |= NETIF_F_NOCACHE_COPY; + if (!(dev->flags & IFF_LOOPBACK)) { + dev->hw_features |= NETIF_F_NOCACHE_COPY; + if (dev->features & NETIF_F_ALL_CSUM) { + dev->wanted_features |= NETIF_F_NOCACHE_COPY; + dev->features |= NETIF_F_NOCACHE_COPY; + } } /* Make NETIF_F_HIGHDMA inheritable to VLAN devices. @@ -6374,10 +6369,6 @@ netdev_features_t netdev_increment_features(netdev_features_t all, all |= one & (NETIF_F_ONE_FOR_ALL|NETIF_F_ALL_CSUM) & mask; all &= one | ~NETIF_F_ALL_FOR_ALL; - /* If device needs checksumming, downgrade to it. */ - if (all & (NETIF_F_ALL_CSUM & ~NETIF_F_NO_CSUM)) - all &= ~NETIF_F_NO_CSUM; - /* If one device supports hw checksumming, set for all. */ if (all & NETIF_F_GEN_CSUM) all &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM); diff --git a/net/core/ethtool.c b/net/core/ethtool.c index bbf84fe0096e..d2eff9ec88be 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -43,7 +43,6 @@ EXPORT_SYMBOL(ethtool_op_get_link); static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = { [NETIF_F_SG_BIT] = "tx-scatter-gather", [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4", - [NETIF_F_NO_CSUM_BIT] = "tx-checksum-unneeded", [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic", [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6", [NETIF_F_HIGHDMA_BIT] = "highdma", -- 2.30.2