Re: [dpdk-dev] [PATCH] net/octeontx2: extend RSS supported offload types

[Jerin Jacob <jerinjacobk@gmail.com>]

On Wed, Jan 22, 2020 at 9:16 AM <kirankumark@marvell.com> wrote:
>
> From: Kiran Kumar K <kirankumark@marvell.com>
>
> Extend RSS offload types for octeontx2. Add support to select
> L3 SRC, L3 DST, L4 SRC and L4 DST for RSS calculation.
>
> Add support to select L3 SRC or DST only, L4 SRC or DST only for RSS
> calculation.
>
> With this requirement there will be following combinations,
> IPV[4,6]_SRC_ONLY, IPV[4,6]_DST_ONLY, [TCP,UDP,SCTP]_SRC_ONLY,
> [TCP,UDP,SCTP]_DST_ONLY. So, instead of creating a bit for each
> combination, we are using upper 4 bits (31:28) in the flow_key_cfg
> to represent the SRC, DST selection. 31 => L3_SRC, 30 => L3_DST,
> 29 => L4_SRC, 28 => L4_DST. These won't be part of flow_cfg, so that
> we don't need to change the existing ABI.
>
> Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
> ---
>
>  struct nix_rss_flowkey_cfg_rsp {
> diff --git a/drivers/net/octeontx2/otx2_rss.c b/drivers/net/octeontx2/otx2_rss.c
> index bc7b64387..7a8c8f3de 100644
> --- a/drivers/net/octeontx2/otx2_rss.c
> +++ b/drivers/net/octeontx2/otx2_rss.c
> @@ -210,6 +210,18 @@ otx2_rss_ethdev_to_nix(struct otx2_eth_dev *dev, uint64_t ethdev_rss,
>
>         dev->rss_info.nix_rss = ethdev_rss;
>

Should n't we update the struct
rte_eth_dev_info::flow_type_rss_offloads to show this capability to
the driver. Please check other drivers.



> +       if (ethdev_rss & ETH_RSS_L3_SRC_ONLY)
> +               flowkey_cfg |= FLOW_KEY_TYPE_L3_SRC;
> +
> +       if (ethdev_rss & ETH_RSS_L3_DST_ONLY)
> +               flowkey_cfg |= FLOW_KEY_TYPE_L3_DST;
> +
> +       if (ethdev_rss & ETH_RSS_L4_SRC_ONLY)
> +               flowkey_cfg |= FLOW_KEY_TYPE_L4_SRC;
> +
> +       if (ethdev_rss & ETH_RSS_L4_DST_ONLY)
> +               flowkey_cfg |= FLOW_KEY_TYPE_L4_DST;
> +
>         if (ethdev_rss & RSS_IPV4_ENABLE)
>                 flowkey_cfg |= flow_key_type[rss_level][RSS_IPV4_INDEX];
>
> --
> 2.17.1
>