From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Durrant Subject: [PATCH net-next] xen-netfront: add support for IPv6 offloads Date: Wed, 15 Jan 2014 15:18:31 +0000 Message-ID: <1389799111-8372-1-git-send-email-paul.durrant@citrix.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Paul Durrant , Konrad Rzeszutek Wilk , Boris Ostrovsky , David Vrabel To: , Return-path: Received: from smtp02.citrix.com ([66.165.176.63]:25536 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751259AbaAOPSv (ORCPT ); Wed, 15 Jan 2014 10:18:51 -0500 Sender: netdev-owner@vger.kernel.org List-ID: This patch adds support for IPv6 checksum offload and GSO when those features are available in the backend. Signed-off-by: Paul Durrant Cc: Konrad Rzeszutek Wilk Cc: Boris Ostrovsky Cc: David Vrabel --- drivers/net/xen-netfront.c | 48 +++++++++++++++++++++++++++++++++++++++----- 1 file changed, 43 insertions(+), 5 deletions(-) diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index c41537b..321759f 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -617,7 +617,9 @@ static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev) tx->flags |= XEN_NETTXF_extra_info; gso->u.gso.size = skb_shinfo(skb)->gso_size; - gso->u.gso.type = XEN_NETIF_GSO_TYPE_TCPV4; + gso->u.gso.type = (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) ? + XEN_NETIF_GSO_TYPE_TCPV6 : + XEN_NETIF_GSO_TYPE_TCPV4; gso->u.gso.pad = 0; gso->u.gso.features = 0; @@ -809,15 +811,18 @@ static int xennet_set_skb_gso(struct sk_buff *skb, return -EINVAL; } - /* Currently only TCPv4 S.O. is supported. */ - if (gso->u.gso.type != XEN_NETIF_GSO_TYPE_TCPV4) { + if (gso->u.gso.type != XEN_NETIF_GSO_TYPE_TCPV4 && + gso->u.gso.type != XEN_NETIF_GSO_TYPE_TCPV6) { if (net_ratelimit()) pr_warn("Bad GSO type %d\n", gso->u.gso.type); return -EINVAL; } skb_shinfo(skb)->gso_size = gso->u.gso.size; - skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; + skb_shinfo(skb)->gso_type = + (gso->u.gso.type == XEN_NETIF_GSO_TYPE_TCPV4) ? + SKB_GSO_TCPV4 : + SKB_GSO_TCPV6; /* Header must be checked, and gso_segs computed. */ skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY; @@ -1191,6 +1196,15 @@ static netdev_features_t xennet_fix_features(struct net_device *dev, features &= ~NETIF_F_SG; } + if (features & NETIF_F_IPV6_CSUM) { + if (xenbus_scanf(XBT_NIL, np->xbdev->otherend, + "feature-ipv6-csum-offload", "%d", &val) < 0) + val = 0; + + if (!val) + features &= ~NETIF_F_IPV6_CSUM; + } + if (features & NETIF_F_TSO) { if (xenbus_scanf(XBT_NIL, np->xbdev->otherend, "feature-gso-tcpv4", "%d", &val) < 0) @@ -1200,6 +1214,15 @@ static netdev_features_t xennet_fix_features(struct net_device *dev, features &= ~NETIF_F_TSO; } + if (features & NETIF_F_TSO6) { + if (xenbus_scanf(XBT_NIL, np->xbdev->otherend, + "feature-gso-tcpv6", "%d", &val) < 0) + val = 0; + + if (!val) + features &= ~NETIF_F_TSO6; + } + return features; } @@ -1338,7 +1361,9 @@ static struct net_device *xennet_create_dev(struct xenbus_device *dev) netif_napi_add(netdev, &np->napi, xennet_poll, 64); netdev->features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM | NETIF_F_GSO_ROBUST; - netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO; + netdev->hw_features = NETIF_F_SG | + NETIF_F_IPV6_CSUM | + NETIF_F_TSO | NETIF_F_TSO6; /* * Assume that all hw features are available for now. This set @@ -1716,6 +1741,19 @@ again: goto abort_transaction; } + err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv6", "%d", 1); + if (err) { + message = "writing feature-gso-tcpv6"; + goto abort_transaction; + } + + err = xenbus_printf(xbt, dev->nodename, "feature-ipv6-csum-offload", + "%d", 1); + if (err) { + message = "writing feature-ipv6-csum-offload"; + goto abort_transaction; + } + err = xenbus_transaction_end(xbt, 0); if (err) { if (err == -EAGAIN) -- 1.7.10.4