diff options
| author | Paul Durrant <Paul.Durrant@citrix.com> | 2014-01-15 17:30:33 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-16 16:22:54 -0800 |
| commit | 2c0057dec90bf65618c5e8f97e9193ff756ee2fb (patch) | |
| tree | f56095abb803f61304ce0d0f854b6df45614b4a3 /drivers/net/xen-netfront.c | |
| parent | 0b4cec8c2e872a6bc9146a001d7532f31023aed5 (diff) | |
| download | linux-rt-2c0057dec90bf65618c5e8f97e9193ff756ee2fb.tar.gz | |
xen-netfront: add support for IPv6 offloads
This patch adds support for IPv6 checksum offload and GSO when those
features are available in the backend.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netfront.c')
| -rw-r--r-- | drivers/net/xen-netfront.c | 48 |
1 files changed, 43 insertions, 5 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index c41537b577a4..d7bee8a5308e 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_write(xbt, dev->nodename, "feature-gso-tcpv6", "1"); + if (err) { + message = "writing feature-gso-tcpv6"; + goto abort_transaction; + } + + err = xenbus_write(xbt, dev->nodename, "feature-ipv6-csum-offload", + "1"); + if (err) { + message = "writing feature-ipv6-csum-offload"; + goto abort_transaction; + } + err = xenbus_transaction_end(xbt, 0); if (err) { if (err == -EAGAIN) |