Support TCP/UDP checksum offload. Signed-off-by: Yong Wang <yongwang at vmware.com> --- doc/guides/rel_notes/release_2_3.rst | 3 +++ drivers/net/vmxnet3/vmxnet3_rxtx.c | 26 +++++++++++++++++++++++--- 2 files changed, 26 insertions(+), 3 deletions(-)
diff --git a/doc/guides/rel_notes/release_2_3.rst b/doc/guides/rel_notes/release_2_3.rst index a23c8ac..58205fe 100644 --- a/doc/guides/rel_notes/release_2_3.rst +++ b/doc/guides/rel_notes/release_2_3.rst @@ -20,6 +20,9 @@ Drivers Tx data ring has been shown to improve small pkt forwarding performance on vSphere environment. +* **vmxnet3: add tx l4 cksum offload.** + + Support TCP/UDP checksum offload. Libraries ~~~~~~~~~ diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c index f3af2f2..2c1bc3c 100644 --- a/drivers/net/vmxnet3/vmxnet3_rxtx.c +++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c @@ -415,7 +415,27 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, gdesc->txd.tci = txm->vlan_tci; } - /* TODO: Add transmit checksum offload here */ + if (txm->ol_flags & PKT_TX_L4_MASK) { + gdesc->txd.om = VMXNET3_OM_CSUM; + gdesc->txd.hlen = txm->l2_len + txm->l3_len; + + switch (txm->ol_flags & PKT_TX_L4_MASK) { + case PKT_TX_TCP_CKSUM: + gdesc->txd.msscof = gdesc->txd.hlen + offsetof(struct tcp_hdr, cksum); + break; + case PKT_TX_UDP_CKSUM: + gdesc->txd.msscof = gdesc->txd.hlen + offsetof(struct udp_hdr, dgram_cksum); + break; + default: + PMD_TX_LOG(WARNING, "requested cksum offload not supported %#llx", + txm->ol_flags & PKT_TX_L4_MASK); + abort(); + } + } else { + gdesc->txd.hlen = 0; + gdesc->txd.om = VMXNET3_OM_NONE; + gdesc->txd.msscof = 0; + } /* flip the GEN bit on the SOP */ rte_compiler_barrier(); @@ -729,8 +749,8 @@ vmxnet3_dev_tx_queue_setup(struct rte_eth_dev *dev, PMD_INIT_FUNC_TRACE(); if ((tx_conf->txq_flags & ETH_TXQ_FLAGS_NOXSUMS) != - ETH_TXQ_FLAGS_NOXSUMS) { - PMD_INIT_LOG(ERR, "TX no support for checksum offload yet"); + ETH_TXQ_FLAGS_NOXSUMSCTP) { + PMD_INIT_LOG(ERR, "SCTP checksum offload not supported"); return -EINVAL; } -- 1.9.1