[PATCH] net/ice: fix Tx offload path choice

[Ling, WeiX]

> -----Original Message-----
> From: Kevin Liu <kevinx.liu at intel.com>
> Sent: Friday, December 24, 2021 11:09 PM
> To: dev at dpdk.org
> Cc: Zhang, Qi Z <qi.z.zhang at intel.com>; Yang, SteveX
> <stevex.yang at intel.com>; Liu, KevinX <kevinx.liu at intel.com>;
> stable at dpdk.org
> Subject: [PATCH] net/ice: fix Tx offload path choice
>
> Testpmd forwards packets in checksum mode that it needs to calculate the
> checksum of each layer's protocol.
>
> When setting the hardware calculates the outer UDP checksum and the
> software calculates the outer IP checksum, the dev->tx_pkt_burst in
> ice_set_tx_function is set to ice_xmit_pkts_vec_avx2.
> The inner and outer UDP checksum of the tunnel packet after forwarding is
> wrong.The dev->tx_pkt_burst should be set to ice_xmit_pkts.
>
> The patch adds RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM to
> ICE_TX_NO_VECTOR_FLAGS,set dev->tx_pkt_burst to ice_xmit_pkts.After
> the tunnel packet is forwarded, the inner and outer UDP checksum is correct.
>
> At the same time, the patch of "net/ice: fix Tx Checksum offload" will cause
> interrupt errors in a special case that only inner IP and inner UDP checksum
> are set for hardware calculation.The patch is updating
> ICE_TX_NO_VECTOR_FLAGS, the problem can be solved, so I will restore the
> code modification of that patch.
>
> Fixes: e6b9d6411e91 ("app/testpmd: add SW L4 checksum in multi-
> segments")
> Fixes: 28f9002ab67f ("net/ice: add Tx AVX512 offload path")
> Fixes: 295968d17407 ("ethdev: add namespace")
> Fixes: 17c7d0f9d6a4 ("net/ice: support basic Rx/Tx")
> Cc: stable at dpdk.org
>
> Signed-off-by: Kevin Liu <kevinx.liu at intel.com>
> ---

Tested-by: Wei Ling <weix.ling at intel.com>