[dpdk-dev] [PATCH] doc: announce ABI change for RSS hash funtion

Ananyev, Konstantin konstantin.ananyev at intel.com
Tue Aug 6 16:45:34 CEST 2019

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Thomas Monjalon
> Sent: Tuesday, August 6, 2019 12:35 PM
> To: Su, Simei <simei.su at intel.com>
> Cc: dev at dpdk.org; Zhang, Qi Z <qi.z.zhang at intel.com>; Wu, Jingjing <jingjing.wu at intel.com>; Xing, Beilei <beilei.xing at intel.com>; Yang,
> Qiming <qiming.yang at intel.com>; orika at mellanox.com; adrien.mazarguil at 6wind.com; arybchenko at solarflare.com; Yigit, Ferruh
> <ferruh.yigit at intel.com>
> Subject: Re: [dpdk-dev] [PATCH] doc: announce ABI change for RSS hash funtion
> 04/07/2019 06:43, simei:
> > From: Simei Su <simei.su at intel.com>
> >
> > Add new field SYMMETRIC_TOEPLITZ in rte_eth_hash_function. This
> > can support symmetric hash function by rte_flow RSS action.
> >
> > Signed-off-by: Simei Su <simei.su at intel.com>
> > ---
> > +* ethdev: New member in ``rte_eth_hash_funtion`` to support symmetric hash funtion.
> That's unfortunate there is a typo in the name of the enum you want to change.
> Do you have any reference to the algo you want to support? A paper maybe?

If I am not mistaken that's just an intent to enable symmetric RSS hash-function via standard RSS  rte_flow API -
feature already available with i40e and newest Intel HW.
(AFAIK on i40e right now it could be configured via RTE_ETH_HASH_FILTER_SYM_HASH_ENA_PER_PORT).
If so, then I think the author may need to mention what PMDs will support that feature in 19.11.


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