diff options
| author | Kittipon Meesompop | 2018-04-26 09:42:22 +0200 |
|---|---|---|
| committer | David S. Miller | 2018-04-27 19:38:49 +0200 |
| commit | 571f9dd8026b44fe52d9ca9ed6a68c53aad1f3ba (patch) | |
| tree | f416457ad6ff96730b6ba225d86ed121945b1ae0 /drivers/s390/net/qeth_core_main.c | |
| parent | s390/qeth: extend Checksum Offload Assists for IPv6 (diff) | |
| download | kernel-qcow2-linux-571f9dd8026b44fe52d9ca9ed6a68c53aad1f3ba.tar.gz kernel-qcow2-linux-571f9dd8026b44fe52d9ca9ed6a68c53aad1f3ba.tar.xz kernel-qcow2-linux-571f9dd8026b44fe52d9ca9ed6a68c53aad1f3ba.zip | |
s390/qeth: add IPv6 TX checksum offload support
Check if a qeth device supports IPv6 TX checksum offload, and advertise
NETIF_F_IPV6_CSUM accordingly. Add support for setting the relevant bits
in IPv6 packet descriptors.
Currently this has only limited use (ie. UDP, or Jumbo Frames). For any
TCP traffic with a standard MSS, the TCP checksum gets calculated
as part of the linear GSO segmentation.
Signed-off-by: Kittipon Meesompop <kmeesomp@linux.vnet.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net/qeth_core_main.c')
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 5e4a509822f1..55b05d9c1cb6 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -6349,12 +6349,12 @@ static int qeth_ipa_checksum_run_cmd(struct qeth_card *card, static int qeth_send_checksum_on(struct qeth_card *card, int cstype, enum qeth_prot_versions prot) { - const __u32 required_features = QETH_IPA_CHECKSUM_IP_HDR | - QETH_IPA_CHECKSUM_UDP | - QETH_IPA_CHECKSUM_TCP; + u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP; struct qeth_checksum_cmd chksum_cb; int rc; + if (prot == QETH_PROT_IPV4) + required_features |= QETH_IPA_CHECKSUM_IP_HDR; rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0, &chksum_cb, prot); if (!rc) { @@ -6430,8 +6430,8 @@ static int qeth_set_ipa_tso(struct qeth_card *card, int on) return rc; } -#define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO) - +#define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \ + NETIF_F_IPV6_CSUM) /** * qeth_recover_features() - Restore device features after recovery * @dev: the recovering net_device @@ -6471,6 +6471,12 @@ int qeth_set_features(struct net_device *dev, netdev_features_t features) if (rc) changed ^= NETIF_F_IP_CSUM; } + if (changed & NETIF_F_IPV6_CSUM) { + rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM, + IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6); + if (rc) + changed ^= NETIF_F_IPV6_CSUM; + } if ((changed & NETIF_F_RXCSUM)) { rc = qeth_set_ipa_csum(card, features & NETIF_F_RXCSUM, IPA_INBOUND_CHECKSUM, QETH_PROT_IPV4); @@ -6500,6 +6506,8 @@ netdev_features_t qeth_fix_features(struct net_device *dev, QETH_DBF_TEXT(SETUP, 2, "fixfeat"); if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) features &= ~NETIF_F_IP_CSUM; + if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) + features &= ~NETIF_F_IPV6_CSUM; if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) features &= ~NETIF_F_RXCSUM; if (!qeth_is_supported(card, IPA_OUTBOUND_TSO)) |