[dpdk-dev] [PATCH] net/ena: enable multi segment in Tx offload flags

[Michał Krawczyk]

pon., 12 lip 2021 o 19:03 Ghalem Boudour <ghalem.boudour at 6wind.com> napisał(a):
>
> The DPDK ENA driver does not provide multi-segment tx offload capability.
> Let's add DEV_TX_OFFLOAD_MULTI_SEGS to ports offload capability by default.
>

Hi Ghalem,

This patch enables announcement of the DEV_TX_OFFLOAD_MULTI_SEGS
capability, but still the application may not request this offload.

As ENA PMD currently assumes all the mbufs may have multiple segments
(and we don't have fast-path for the other cases), I suggest
overwriting this flag in the ena_dev_configure(), similar to what
we're doing with the DEV_RX_OFFLOAD_RSS_HASH flag.

Best regards,
Michal

> This flag in not listed in doc/guides/nics/features/default.ini, so
> ena.ini does not need to be updated.
>
> Signed-off-by: Ghalem Boudour <ghalem.boudour at 6wind.com>
> Reviewed-by: Olivier Matz <olivier.matz at 6wind.com>
> ---
>  drivers/net/ena/ena_ethdev.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
> index dfe68279fa7b..a8422ee425ce 100644
> --- a/drivers/net/ena/ena_ethdev.c
> +++ b/drivers/net/ena/ena_ethdev.c
> @@ -2055,6 +2055,7 @@ static int ena_infos_get(struct rte_eth_dev *dev,
>                         DEV_RX_OFFLOAD_TCP_CKSUM;
>
>         rx_feat |= DEV_RX_OFFLOAD_JUMBO_FRAME;
> +       tx_feat |= DEV_TX_OFFLOAD_MULTI_SEGS;
>
>         /* Inform framework about available features */
>         dev_info->rx_offload_capa = rx_feat;
> --
> 2.28.0
>