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WOW64; rv:52.0) Gecko/20100101 > Thunderbird/52.9.1 > > External Email > > On 10/5/2018 5:46 AM, Jerin Jacob wrote: > > Based on PKT_TX_IP_CKSUM definition the user needs > > to fill l2_len and l3_len mbuf fields before issuing > > HW Tx checksum request. > > > > Fixes: dad1ec72a377 ("doc: document NIC features") > > Cc: stable@dpdk.org > > > > Signed-off-by: Jerin Jacob > > --- > > > > See PKT_TX_IP_CKSUM at > > https://git.dpdk.org/dpdk/tree/lib/librte_mbuf/rte_mbuf.h#n283 > > > > --- > > doc/guides/nics/features.rst | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst > > index b085bda86..e726a6bb8 100644 > > --- a/doc/guides/nics/features.rst > > +++ b/doc/guides/nics/features.rst > > @@ -562,6 +562,7 @@ Supports L3 checksum offload. > > * **[uses] rte_eth_txconf,rte_eth_txmode**: ``offloads:DEV_TX_OFFLOAD_IPV4_CKSUM``. > > * **[uses] mbuf**: ``mbuf.ol_flags:PKT_TX_IP_CKSUM``, > > ``mbuf.ol_flags:PKT_TX_IPV4`` | ``PKT_TX_IPV6``. > > +* **[uses] mbuf**: ``mbuf.l2_len``, ``mbuf.l3_len``. > > Thanks this was missing. > > ``mbuf.l2_len``, ``mbuf.l3_len`` are required for TX CKSUM offload, in > documentation there is no distinction for Rx or Tx, do you think does it worth > to clarify PMD `uses` these values for Tx cksum offload only? IMO, there will not be any confusion as mbuf.l2_len comes under uint64_t tx_offload in struct rte_mbuf. > > > > * **[provides] mbuf**: ``mbuf.ol_flags:PKT_RX_IP_CKSUM_UNKNOWN`` | > > ``PKT_RX_IP_CKSUM_BAD`` | ``PKT_RX_IP_CKSUM_GOOD`` | > > ``PKT_RX_IP_CKSUM_NONE``. > > >