[dpdk-dev] [RFC] Generic flow director/filtering/classification API

[Chandran, Sugesh]

Hi Andrey,

Regards
_Sugesh


> -----Original Message-----
> From: Chilikin, Andrey
> Sent: Friday, July 15, 2016 11:02 AM
> To: Chandran, Sugesh <sugesh.chandran at intel.com>; 'Adrien Mazarguil'
> <adrien.mazarguil at 6wind.com>
> Cc: dev at dpdk.org; Thomas Monjalon <thomas.monjalon at 6wind.com>;
> Zhang, Helin <helin.zhang at intel.com>; Wu, Jingjing
> <jingjing.wu at intel.com>; Rasesh Mody <rasesh.mody at qlogic.com>; Ajit
> Khaparde <ajit.khaparde at broadcom.com>; Rahul Lakkireddy
> <rahul.lakkireddy at chelsio.com>; Lu, Wenzhuo <wenzhuo.lu at intel.com>;
> Jan Medala <jan at semihalf.com>; John Daley <johndale at cisco.com>; Chen,
> Jing D <jing.d.chen at intel.com>; Ananyev, Konstantin
> <konstantin.ananyev at intel.com>; Matej Vido <matejvido at gmail.com>;
> Alejandro Lucero <alejandro.lucero at netronome.com>; Sony Chacko
> <sony.chacko at qlogic.com>; Jerin Jacob
> <jerin.jacob at caviumnetworks.com>; De Lara Guarch, Pablo
> <pablo.de.lara.guarch at intel.com>; Olga Shern <olgas at mellanox.com>
> Subject: RE: [dpdk-dev] [RFC] Generic flow director/filtering/classification
> API
> 
> Hi Sugesh,
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Chandran, Sugesh
> > Sent: Friday, July 15, 2016 10:23 AM
> > To: 'Adrien Mazarguil' <adrien.mazarguil at 6wind.com>
> 
> <snip>
> 
> > > > > To PMD maintainers: please comment if you know devices that
> > > > > support tagging matching packets with more than 32 bits of
> > > > > user-provided data!
> > > > [Sugesh] I guess the flow director ID is 64 bit , The XL710 datasheet says
> so.
> > > > And in the 'rte_mbuf' structure the 64 bit FDIR-ID is shared with
> > > > rss hash. This can be a software driver limitation that expose
> > > > only
> > > > 32 bit. Possibly because of cache alignment issues? Since the
> > > > hardware can support 64 bit, I feel it make sense to support 64 bit as
> well.
> 
> XL710 supports 32bit FDIR ID only, I believe you mix it up with flexible payload
> data which can take 0, 4 or 8 bytes of the RX descriptor.
[Sugesh] Thank you for correcting Andrey.
Its my mistake..I mixed up with flexible payload data. The FDIR ID is only 32 bit.

> 
> Regards,
> Andrey