[dpdk-dev] [PATCH v2 1/2] ethdev: add level support for RSS offload types

[Ajit Khaparde]

On Sat, Aug 8, 2020 at 7:36 AM <kirankumark at marvell.com> wrote:

> From: Kiran Kumar K <kirankumark at marvell.com>
>
> This patch reserves 2 bits as input selection to select Inner and
> outer layers for RSS computation. It is combined with existing
> ETH_RSS_* to choose Inner or outer layers for L2, L3 and L4.

How do you plan to use this? Do you need to make any changes to testpmd?


> This functionality already exists in rte_flow through level parameter in
> RSS action configuration rte_flow_action_rss.
>
> Signed-off-by: Kiran Kumar K <kirankumark at marvell.com>
> ---
> v2 changes:
> * Reserved bit 50 & 51
>
>  lib/librte_ethdev/rte_ethdev.h | 27 +++++++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
>
> diff --git a/lib/librte_ethdev/rte_ethdev.h
> b/lib/librte_ethdev/rte_ethdev.h
> index d29930fd8..28184cc85 100644
> --- a/lib/librte_ethdev/rte_ethdev.h
> +++ b/lib/librte_ethdev/rte_ethdev.h
> @@ -552,6 +552,33 @@ struct rte_eth_rss_conf {
>  #define RTE_ETH_RSS_L3_PRE64      (1ULL << 53)
>  #define RTE_ETH_RSS_L3_PRE96      (1ULL << 52)
>
> +/*
> + * We use the following macros to combine with the above layers to choose
> + * inner and outer layers or both for RSS computation.
> + * Note: Default is 0: inner layers, 1: outer layers, 2: both
> + * bit 50 and 51 are reserved for this.
> + */
> +
> +/**
> + * Level 0, It basically stands for the innermost encapsulation level RSS
> + * can be performed on according to PMD and device capabilities.
> + */
> +#define ETH_RSS_LEVEL_INNER        (0ULL << 50)
> +/**
> + * Level 1, It basically stands for the outermost encapsulation level RSS
> + * can be performed on according to PMD and device capabilities.
> + */
> +#define ETH_RSS_LEVEL_OUTER        (1ULL << 50)
> +/**
> + * Level 2, It basically stands for the both inner and outermost
> + * encapsulation level RSS can be performed on according to PMD and
> + * device capabilities.
> + */
> +#define ETH_RSS_LEVEL_INNER_OUTER  (2ULL << 50)
> +#define ETH_RSS_LEVEL_MASK        (3ULL << 50)
> +
> +#define ETH_RSS_LEVEL(rss_hf) ((rss_hf & ETH_RSS_LEVEL_MASK) >> 50)
> +
>  /**
>   * For input set change of hash filter, if SRC_ONLY and DST_ONLY of
>   * the same level are used simultaneously, it is the same case as
> --
> 2.25.1
>
>