From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Metcalf Subject: [PATCH 09/12] tile: support TSO for IPv6 in tilegx network driver Date: Wed, 31 Jul 2013 11:05:04 -0400 Message-ID: <799eca39dc7f85ba12e1d8c5b072f8b6740fda1c.1375283106.git.cmetcalf@tilera.com> References: Mime-Version: 1.0 Content-Type: text/plain To: , Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Signed-off-by: Chris Metcalf --- drivers/net/ethernet/tile/tilegx.c | 44 +++++++++++++++++++++++++------------- 1 file changed, 29 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/tile/tilegx.c b/drivers/net/ethernet/tile/tilegx.c index 01068a9..ebc1b43 100644 --- a/drivers/net/ethernet/tile/tilegx.c +++ b/drivers/net/ethernet/tile/tilegx.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include @@ -1512,20 +1513,20 @@ static int tso_count_edescs(struct sk_buff *skb) return num_edescs; } -/* Prepare modified copies of the skbuff headers. - * FIXME: add support for IPv6. - */ +/* Prepare modified copies of the skbuff headers. */ static void tso_headers_prepare(struct sk_buff *skb, unsigned char *headers, s64 slot) { struct skb_shared_info *sh = skb_shinfo(skb); struct iphdr *ih; + struct ipv6hdr *ih6; struct tcphdr *th; unsigned int sh_len = skb_transport_offset(skb) + tcp_hdrlen(skb); unsigned int data_len = skb->len - sh_len; unsigned char *data = skb->data; unsigned int ih_off, th_off, p_len; unsigned int isum_seed, tsum_seed, id, seq; + int is_ipv6; long f_id = -1; /* id of the current fragment */ long f_size = skb_headlen(skb) - sh_len; /* current fragment size */ long f_used = 0; /* bytes used from the current fragment */ @@ -1533,18 +1534,24 @@ static void tso_headers_prepare(struct sk_buff *skb, unsigned char *headers, int segment; /* Locate original headers and compute various lengths. */ - ih = ip_hdr(skb); + is_ipv6 = skb_is_gso_v6(skb); + if (is_ipv6) { + ih6 = ipv6_hdr(skb); + ih_off = skb_network_offset(skb); + } else { + ih = ip_hdr(skb); + ih_off = skb_network_offset(skb); + isum_seed = ((0xFFFF - ih->check) + + (0xFFFF - ih->tot_len) + + (0xFFFF - ih->id)); + id = ntohs(ih->id); + } + th = tcp_hdr(skb); - ih_off = skb_network_offset(skb); th_off = skb_transport_offset(skb); p_len = sh->gso_size; - /* Set up seed values for IP and TCP csum and initialize id and seq. */ - isum_seed = ((0xFFFF - ih->check) + - (0xFFFF - ih->tot_len) + - (0xFFFF - ih->id)); tsum_seed = th->check + (0xFFFF ^ htons(skb->len)); - id = ntohs(ih->id); seq = ntohl(th->seq); /* Prepare all the headers. */ @@ -1558,11 +1565,17 @@ static void tso_headers_prepare(struct sk_buff *skb, unsigned char *headers, memcpy(buf, data, sh_len); /* Update copied ip header. */ - ih = (struct iphdr *)(buf + ih_off); - ih->tot_len = htons(sh_len + p_len - ih_off); - ih->id = htons(id); - ih->check = csum_long(isum_seed + ih->tot_len + - ih->id) ^ 0xffff; + if (is_ipv6) { + ih6 = (struct ipv6hdr *)(buf + ih_off); + ih6->payload_len = htons(sh_len + p_len - ih_off - + sizeof(*ih6)); + } else { + ih = (struct iphdr *)(buf + ih_off); + ih->tot_len = htons(sh_len + p_len - ih_off); + ih->id = htons(id); + ih->check = csum_long(isum_seed + ih->tot_len + + ih->id) ^ 0xffff; + } /* Update copied tcp header. */ th = (struct tcphdr *)(buf + th_off); @@ -1950,6 +1963,7 @@ static void tile_net_setup(struct net_device *dev) dev->features |= NETIF_F_HW_CSUM; dev->features |= NETIF_F_SG; dev->features |= NETIF_F_TSO; + dev->features |= NETIF_F_TSO6; dev->mtu = 1500; } -- 1.8.3.1