diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/net/qeth_main.c | 82 |
1 files changed, 68 insertions, 14 deletions
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c index 610d27cfd28b..443cde10353e 100644 --- a/drivers/s390/net/qeth_main.c +++ b/drivers/s390/net/qeth_main.c @@ -4555,6 +4555,53 @@ qeth_get_elements_no(struct qeth_card *card, void *hdr, return elements_needed; } +static void qeth_tx_csum(struct sk_buff *skb) +{ + int tlen; + + if (skb->protocol == htons(ETH_P_IP)) { + tlen = ntohs(ip_hdr(skb)->tot_len) - (ip_hdr(skb)->ihl << 2); + switch (ip_hdr(skb)->protocol) { + case IPPROTO_TCP: + tcp_hdr(skb)->check = 0; + tcp_hdr(skb)->check = csum_tcpudp_magic( + ip_hdr(skb)->saddr, ip_hdr(skb)->daddr, + tlen, ip_hdr(skb)->protocol, + skb_checksum(skb, skb_transport_offset(skb), + tlen, 0)); + break; + case IPPROTO_UDP: + udp_hdr(skb)->check = 0; + udp_hdr(skb)->check = csum_tcpudp_magic( + ip_hdr(skb)->saddr, ip_hdr(skb)->daddr, + tlen, ip_hdr(skb)->protocol, + skb_checksum(skb, skb_transport_offset(skb), + tlen, 0)); + break; + } + } else if (skb->protocol == htons(ETH_P_IPV6)) { + switch (ipv6_hdr(skb)->nexthdr) { + case IPPROTO_TCP: + tcp_hdr(skb)->check = 0; + tcp_hdr(skb)->check = csum_ipv6_magic( + &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, + ipv6_hdr(skb)->payload_len, + ipv6_hdr(skb)->nexthdr, + skb_checksum(skb, skb_transport_offset(skb), + ipv6_hdr(skb)->payload_len, 0)); + break; + case IPPROTO_UDP: + udp_hdr(skb)->check = 0; + udp_hdr(skb)->check = csum_ipv6_magic( + &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, + ipv6_hdr(skb)->payload_len, + ipv6_hdr(skb)->nexthdr, + skb_checksum(skb, skb_transport_offset(skb), + ipv6_hdr(skb)->payload_len, 0)); + break; + } + } +} static int qeth_send_packet(struct qeth_card *card, struct sk_buff *skb) @@ -4640,6 +4687,10 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb) elements_needed += elems; } + if ((large_send == QETH_LARGE_SEND_NO) && + (skb->ip_summed == CHECKSUM_PARTIAL)) + qeth_tx_csum(new_skb); + if (card->info.type != QETH_CARD_TYPE_IQD) rc = qeth_do_send_packet(card, queue, new_skb, hdr, elements_needed, ctx); @@ -6387,20 +6438,18 @@ qeth_deregister_addr_entry(struct qeth_card *card, struct qeth_ipaddr *addr) static u32 qeth_ethtool_get_tx_csum(struct net_device *dev) { - /* We may need to say that we support tx csum offload if - * we do EDDP or TSO. There are discussions going on to - * enforce rules in the stack and in ethtool that make - * SG and TSO depend on HW_CSUM. At the moment there are - * no such rules.... - * If we say yes here, we have to checksum outbound packets - * any time. */ - return 0; + return (dev->features & NETIF_F_HW_CSUM) != 0; } static int qeth_ethtool_set_tx_csum(struct net_device *dev, u32 data) { - return -EINVAL; + if (data) + dev->features |= NETIF_F_HW_CSUM; + else + dev->features &= ~NETIF_F_HW_CSUM; + + return 0; } static u32 @@ -7414,7 +7463,8 @@ qeth_start_ipa_tso(struct qeth_card *card) } if (rc && (card->options.large_send == QETH_LARGE_SEND_TSO)){ card->options.large_send = QETH_LARGE_SEND_NO; - card->dev->features &= ~ (NETIF_F_TSO | NETIF_F_SG); + card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG | + NETIF_F_HW_CSUM); } return rc; } @@ -7554,22 +7604,26 @@ qeth_set_large_send(struct qeth_card *card, enum qeth_large_send_types type) card->options.large_send = type; switch (card->options.large_send) { case QETH_LARGE_SEND_EDDP: - card->dev->features |= NETIF_F_TSO | NETIF_F_SG; + card->dev->features |= NETIF_F_TSO | NETIF_F_SG | + NETIF_F_HW_CSUM; break; case QETH_LARGE_SEND_TSO: if (qeth_is_supported(card, IPA_OUTBOUND_TSO)){ - card->dev->features |= NETIF_F_TSO | NETIF_F_SG; + card->dev->features |= NETIF_F_TSO | NETIF_F_SG | + NETIF_F_HW_CSUM; } else { PRINT_WARN("TSO not supported on %s. " "large_send set to 'no'.\n", card->dev->name); - card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG); + card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG | + NETIF_F_HW_CSUM); card->options.large_send = QETH_LARGE_SEND_NO; rc = -EOPNOTSUPP; } break; default: /* includes QETH_LARGE_SEND_NO */ - card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG); + card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG | + NETIF_F_HW_CSUM); break; } if (card->state == CARD_STATE_UP) |