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Tue, 29 Aug 2023 00:38:33 -0700 (PDT) MIME-Version: 1.0 References: <20230802173451.3151646-1-qi.z.zhang@intel.com> <98CBD80474FA8B44BF855DF32C47DC35D87AB8@smartserver.smartshare.dk> <98CBD80474FA8B44BF855DF32C47DC35D87AB9@smartserver.smartshare.dk> <CALBAE1OLAw0jA-GH-j3evBJ+GhqvRxeUEk1TSxwVrxXQbzDL4w@mail.gmail.com> <DS0PR11MB7442A5C3D7949AD1D9EE7008EB0BA@DS0PR11MB7442.namprd11.prod.outlook.com> <98CBD80474FA8B44BF855DF32C47DC35D87ABF@smartserver.smartshare.dk> <MW2PR12MB4666530D9A316362DF8BD3F8D60BA@MW2PR12MB4666.namprd12.prod.outlook.com> <MW2PR12MB4666530C86BE0EEFD2166C39D60BA@MW2PR12MB4666.namprd12.prod.outlook.com> <PH7PR11MB7450AA53C689604CCA00E4BEEB0BA@PH7PR11MB7450.namprd11.prod.outlook.com> <98CBD80474FA8B44BF855DF32C47DC35D87AC2@smartserver.smartshare.dk> <DM4PR11MB59940F8B256243F99CA55C20D708A@DM4PR11MB5994.namprd11.prod.outlook.com> <98CBD80474FA8B44BF855DF32C47DC35D87AC4@smartserver.smartshare.dk> <DS0PR11MB7442FA5FD7E623E164D700CDEB15A@DS0PR11MB7442.namprd11.prod.outlook.com> <DS0PR11MB744270B2AA5378B0A70FFB7CEB15A@DS0PR11MB7442.namprd11.prod.outlook.com> <MW2PR12MB466674EC05B218966F810DECD6E1A@MW2PR12MB4666.namprd12.prod.outlook.com> <DS0PR11MB7442B2B00EDBDAA3CC631617EBE0A@DS0PR11MB7442.namprd11.prod.outlook.com> In-Reply-To: <DS0PR11MB7442B2B00EDBDAA3CC631617EBE0A@DS0PR11MB7442.namprd11.prod.outlook.com> From: Jerin Jacob <jerinjacobk@gmail.com> Date: Tue, 29 Aug 2023 13:08:07 +0530 Message-ID: <CALBAE1M27yb-kXR=_1u7BmL--b0Ju56_A4Tc51P4Oiwv5Og5Sw@mail.gmail.com> Subject: Re: DPDK community: RTE_FLOW support for P4-programmable devices To: "Dumitrescu, Cristian" <cristian.dumitrescu@intel.com> Cc: Ori Kam <orika@nvidia.com>, =?UTF-8?Q?Morten_Br=C3=B8rup?= <mb@smartsharesystems.com>, "Zhang, Qi Z" <qi.z.zhang@intel.com>, "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>, "techboard@dpdk.org" <techboard@dpdk.org>, "Mcnamara, John" <john.mcnamara@intel.com>, "Zhang, Helin" <helin.zhang@intel.com>, "dev@dpdk.org" <dev@dpdk.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org On Mon, Aug 28, 2023 at 9:43=E2=80=AFPM Dumitrescu, Cristian <cristian.dumitrescu@intel.com> wrote: > > > > We just set up a community call for next week to discuss in more deta= ils the > > > proposal for RTE_FLOW extensions to support P4-programmable devices > > > https://mails.dpdk.org/archives/dev/2023-August/273703.html and look = for > > > ways to converge and make progress. > > > > > > All the people from To: and CC: are already invited. To avoid clutter= ing > > people's > > > calendars, I did not add dev@dpdk.org, so if anybody else wants to at= tend, > > > please send me a private email and I will be happy to forward the inv= ite. > > > > > > Thanks, > > > Cristian > > Attendees: Morten Brorup, Jerin Jacob, Anoob Joseph, Vipin Varghese, Qi Z= hang, > Cristian Dumitrescu > > 1. Ori (RTE_FLOW maintainer) and others were not present, probably on vac= ation, > hopefully they will be able to attend the next call on this topic. Ferruh= had a last > minute conflict that he could not avoid. > > 2. Cristian presented a few slides (attached) with the problem statement,= current > RTE_FLOW gaps for P4-programmable devices and the list of current solutio= n > proposals. > > 3. Everybody on the call agreed that the P4-programmable devices from Int= el, > AMD and others need to be fully supported by DPDK and that there are some > gaps in RTE_FLOW to be fixed for supporting these devices. Personally, It makes sense to me to have normative DPDK API to send p4 runtime message to the ethdev so that we have "vendor neutral + DPDK based" p4 runtime backend. I prefer to have specialized ethdev ops for this due to the following reaso= ns. # If the ethdev has both real TCAM based HW(for existing rte_flow patterns and actions) and SW agent to receive P4 runtime message etc. Typically, it needs to take a different path in driver to talk. Assume, if = you have cascaded patterns/actions, One is targeted for TCAM and other for SW agent for p4, one need to have serious amount checking for dispatching.It complicates the driver and forbid to have driver optimization especially cases for templates etc. if user making rules for both category of HW. # All we need "char buffer//string" based communication ethdev <-> app.