[dpdk-dev] [PATCH v7 2/3] ethdev: extend RSS offload types

Su, Simei simei.su at intel.com
Sun Sep 29 10:55:41 CEST 2019



> -----Original Message-----
> From: Su, Simei
> Sent: Sunday, September 29, 2019 3:09 PM
> To: Zhang, Qi Z <qi.z.zhang at intel.com>; Wu, Jingjing <jingjing.wu at intel.com>;
> Ye, Xiaolong <xiaolong.ye at intel.com>; Yigit, Ferruh <ferruh.yigit at intel.com>
> Cc: dev at dpdk.org; Su, Simei <simei.su at intel.com>
> Subject: [PATCH v7 2/3] ethdev: extend RSS offload types
> 
> This patch reserves several bits as input set selection from the high end of the 64
> bits. It is combined with exisiting ETH_RSS_* to represent rss types.
> 
> for example:
>   ETH_RSS_IPV4 | ETH_RSS_L3_SRC_ONLY: hash on src ip address only
>   ETH_RSS_IPV4_UDP | ETH_RSS_L4_DST_ONLY: hash on src/dst IP and
>                                           dst UDP port
> 
> Signed-off-by: Simei Su <simei.su at intel.com>
  Acked-by: Ori Kam <orika at mellanox.com>
> ---
>  lib/librte_ethdev/rte_ethdev.h | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h index
> 7722f70..e68bca8 100644
> --- a/lib/librte_ethdev/rte_ethdev.h
> +++ b/lib/librte_ethdev/rte_ethdev.h
> @@ -505,6 +505,19 @@ struct rte_eth_rss_conf {
>  #define ETH_RSS_GENEVE             (1ULL << 20)
>  #define ETH_RSS_NVGRE              (1ULL << 21)
> 
> +/*
> + * We use the following macros to combine with above ETH_RSS_* for
> + * more specific input set selection. These bits are defined starting
> + * from the high end of the 64 bits.
> + * Note: If we use above ETH_RSS_* without SRC/DST_ONLY, it represents
> + * both SRC and DST are taken into account. SRC_ONLY and DST_ONLY of
> + * the same level can't be used simultaneously.
> + */
> +#define ETH_RSS_L3_SRC_ONLY        (1ULL << 63)
> +#define ETH_RSS_L3_DST_ONLY        (1ULL << 62)
> +#define ETH_RSS_L4_SRC_ONLY        (1ULL << 61)
> +#define ETH_RSS_L4_DST_ONLY        (1ULL << 60)
> +
>  #define ETH_RSS_IP ( \
>  	ETH_RSS_IPV4 | \
>  	ETH_RSS_FRAG_IPV4 | \
> --
> 1.8.3.1



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