From: "Dumitrescu, Cristian" <cristian.dumitrescu@intel.com>
To: "Dumitrescu, Cristian" <cristian.dumitrescu@intel.com>,
Ori Kam <orika@nvidia.com>, Jerin Jacob <jerinjacobk@gmail.com>,
"Zhang, Qi Z" <qi.z.zhang@intel.com>
Cc: "NBU-Contact-Thomas Monjalon (EXTERNAL)" <thomas@monjalon.net>,
"david.marchand@redhat.com" <david.marchand@redhat.com>,
"Richardson, Bruce" <bruce.richardson@intel.com>,
"jerinj@marvell.com" <jerinj@marvell.com>,
"ferruh.yigit@amd.com" <ferruh.yigit@amd.com>,
"Mcnamara, John" <john.mcnamara@intel.com>,
"Zhang, Helin" <helin.zhang@intel.com>,
"techboard@dpdk.org" <techboard@dpdk.org>,
"dev@dpdk.org" <dev@dpdk.org>,
Ivan Malov <ivan.malov@arknetworks.am>
Subject: RE: [RFC] lib/ethdev: introduce table driven APIs
Date: Wed, 2 Aug 2023 09:31:18 +0000 [thread overview]
Message-ID: <DS0PR11MB7442D74D33EB6BAC3AC661A6EB0BA@DS0PR11MB7442.namprd11.prod.outlook.com> (raw)
In-Reply-To: <DS0PR11MB74426627935C3001D80B0107EB39A@DS0PR11MB7442.namprd11.prod.outlook.com>
> -----Original Message-----
> From: Dumitrescu, Cristian <cristian.dumitrescu@intel.com>
> Sent: Wednesday, July 19, 2023 2:39 PM
> To: Ori Kam <orika@nvidia.com>; Jerin Jacob <jerinjacobk@gmail.com>;
> Zhang, Qi Z <qi.z.zhang@intel.com>
> Cc: NBU-Contact-Thomas Monjalon (EXTERNAL) <thomas@monjalon.net>;
> david.marchand@redhat.com; Richardson, Bruce
> <bruce.richardson@intel.com>; jerinj@marvell.com; ferruh.yigit@amd.com;
> Mcnamara, John <john.mcnamara@intel.com>; Zhang, Helin
> <helin.zhang@intel.com>; techboard@dpdk.org; dev@dpdk.org; Ivan Malov
> <ivan.malov@arknetworks.am>
> Subject: RE: [RFC] lib/ethdev: introduce table driven APIs
>
> Hi folks,
>
> > -----Original Message-----
> > From: Ori Kam <orika@nvidia.com>
> > Sent: Tuesday, June 20, 2023 12:11 PM
> > To: Jerin Jacob <jerinjacobk@gmail.com>; Zhang, Qi Z
> > <qi.z.zhang@intel.com>
> > Cc: Dumitrescu, Cristian <cristian.dumitrescu@intel.com>; NBU-Contact-
> > Thomas Monjalon (EXTERNAL) <thomas@monjalon.net>;
> > david.marchand@redhat.com; Richardson, Bruce
> > <bruce.richardson@intel.com>; jerinj@marvell.com;
> ferruh.yigit@amd.com;
> > Mcnamara, John <john.mcnamara@intel.com>; Zhang, Helin
> > <helin.zhang@intel.com>; techboard@dpdk.org; dev@dpdk.org; Ivan
> Malov
> > <ivan.malov@arknetworks.am>
> > Subject: RE: [RFC] lib/ethdev: introduce table driven APIs
> >
> <snip>
>
> > >
> > > Yes. We need to change the backend compiler to understand the rte_flow
> > > mapping to p4 to avoid any translation cost.
> > +1
> > I think the idea is that the complier will convert to rte_flow and supply
> some
> > mapping file so when application uses some name it will be translated to
> the
> > correct
> > preconfigured rte_flow action
>
> Sorry to join late to this thread.
>
> Let me try to clarify the role of the P4 compiler:
>
> 1. P4 compiler is for the data path only, while this proposal is for a control
> path API.
>
> 2. The P4 program simply defines the data path pipeline, i.e. the table
> topology that
> Ivan was mentioning. The P4 compiler takes this P4 program as input and
> translates
> it to a sort of firmware that the HW understands and loads to create that data
> path.
>
> 3. The P4 program defines the key and action formats for each table, but it
> does NOT
> contain the set of entries (key/action pairs) for each table; the actual table
> entries are
> populated post-init by the user using a control path API such as RTE_FLOW or
> other.
>
> So what Qi's proposal is about is a control path API to populate the tables, an
> API that
> is similar to the RTE_FLOW API, and not about a data path API to define a
> topology of
> tables (the table topology is either hardcoded at HW design time or
> configured in HW at
> init time by "firmware" produced by the P4 compiler out of a P4 program).
>
> Makes sense?
>
> Regards,
> Cristian
Hi folks,
Based on community feedback, we realized that introducing a new and significant
API that overlaps in scope with the existing RTE_FLOW API might not be the best
path forward.
Therefore, we are now looking for ways to support our hardware capabilities with
minimal extensions to the RTE_FLOW API, hence Qi and myself just send this
new proposal:
https://mails.dpdk.org/archives/dev/2023-August/273703.html
Please review this new RFC and provide your input.
Thanks for the feedback!
Regards,
Qi and Cristian
prev parent reply other threads:[~2023-08-02 9:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-12 11:15 Qi Zhang
2023-06-12 15:32 ` Ivan Malov
2023-06-13 3:48 ` Zhang, Qi Z
2023-06-13 6:38 ` Ivan Malov
2023-06-14 5:42 ` Zhang, Qi Z
2023-06-14 18:30 ` Ori Kam
2023-06-15 2:25 ` Zhang, Qi Z
2023-06-15 4:57 ` Jerin Jacob
2023-06-15 6:03 ` Zhang, Qi Z
2023-06-15 6:21 ` Jerin Jacob
2023-06-15 7:42 ` Zhang, Qi Z
2023-06-15 8:37 ` Jerin Jacob
2023-06-15 13:25 ` Zhang, Qi Z
2023-06-16 1:20 ` Jerin Jacob
2023-06-19 0:22 ` Zhang, Qi Z
2023-06-19 9:52 ` Jerin Jacob
2023-06-20 1:52 ` Zhang, Qi Z
2023-06-20 5:06 ` Jerin Jacob
2023-06-20 11:10 ` Ori Kam
2023-07-19 13:39 ` Dumitrescu, Cristian
2023-08-02 9:31 ` Dumitrescu, Cristian [this message]
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