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Tue, 24 Mar 2020 00:11:47 +0000 Date: Mon, 23 Mar 2020 21:11:43 -0300 From: Jason Gunthorpe To: Andy Gospodarek Cc: Jiri Pirko , Jakub Kicinski , netdev@vger.kernel.org, davem@davemloft.net, parav@mellanox.com, yuvalav@mellanox.com, saeedm@mellanox.com, leon@kernel.org, andrew.gospodarek@broadcom.com, michael.chan@broadcom.com, moshe@mellanox.com, ayal@mellanox.com, eranbe@mellanox.com, vladbu@mellanox.com, kliteyn@mellanox.com, dchickles@marvell.com, sburla@marvell.com, fmanlunas@marvell.com, tariqt@mellanox.com, oss-drivers@netronome.com, snelson@pensando.io, drivers@pensando.io, aelior@marvell.com, GR-everest-linux-l2@marvell.com, grygorii.strashko@ti.com, mlxsw@mellanox.com, idosch@mellanox.com, markz@mellanox.com, jacob.e.keller@intel.com, valex@mellanox.com, linyunsheng@huawei.com, lihong.yang@intel.com, vikas.gupta@broadcom.com, magnus.karlsson@intel.com Subject: Re: [RFC] current devlink extension plan for NICs Message-ID: <20200324001143.GG20941@ziepe.ca> References: <20200319192719.GD11304@nanopsycho.orion> <20200319203253.73cca739@kicinski-fedora-PC1C0HJN> <20200320073555.GE11304@nanopsycho.orion> <20200320142508.31ff70f3@kicinski-fedora-PC1C0HJN> <20200321093525.GJ11304@nanopsycho.orion> <20200323233200.GD21532@C02YVCJELVCG.greyhouse.net> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200323233200.GD21532@C02YVCJELVCG.greyhouse.net> User-Agent: Mutt/1.9.4 (2018-02-28) X-ClientProxiedBy: BL0PR02CA0030.namprd02.prod.outlook.com (2603:10b6:207:3c::43) To VI1PR05MB4141.eurprd05.prod.outlook.com (2603:10a6:803:44::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mlx.ziepe.ca (142.68.57.212) by BL0PR02CA0030.namprd02.prod.outlook.com (2603:10b6:207:3c::43) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2835.19 via Frontend Transport; Tue, 24 Mar 2020 00:11:46 +0000 Received: from jgg by mlx.ziepe.ca with local (Exim 4.90_1) (envelope-from ) id 1jGXAV-0001rS-1V; Mon, 23 Mar 2020 21:11:43 -0300 X-Originating-IP: [142.68.57.212] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 604a018d-7b2c-4ce5-7400-08d7cf87f0d6 X-MS-TrafficTypeDiagnostic: VI1PR05MB3166:|VI1PR05MB3166: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; X-Forefront-PRVS: 03524FBD26 X-Forefront-Antispam-Report: SFV:NSPM;SFS:(10009020)(4636009)(376002)(396003)(346002)(136003)(366004)(39860400002)(4744005)(2906002)(1076003)(4326008)(7416002)(33656002)(86362001)(6916009)(316002)(186003)(36756003)(478600001)(54906003)(9786002)(66946007)(66556008)(66476007)(9746002)(9686003)(8936002)(81156014)(81166006)(8676002)(5660300002)(52116002)(26005)(24400500001);DIR:OUT;SFP:1101;SCL:1;SRVR:VI1PR05MB3166;H:VI1PR05MB4141.eurprd05.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords; Received-SPF: None (protection.outlook.com: mellanox.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: ILFkF7lHqTX65apy0QfQJgpNLbqbtXc0vLRwlGFaICA5e/FbMuw79ktBlwqk8jE7N2eCNHYyHMH2reDgwyZ4gk3MoDJuGgLB4dIdg9skDGgs1A8k3Oa7LrELE858XStuHrPs7N9beGb+zv8i3980zg== X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: 604a018d-7b2c-4ce5-7400-08d7cf87f0d6 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Mar 2020 00:11:47.2700 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: e0GkdIPmlwZbun0sg8HVNs7/WD712a24ScgvB42QwcuPksLsSs2cS/mComowi4dT8tryi0mPVCwhcGaSuzUZ7Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR05MB3166 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Mon, Mar 23, 2020 at 07:32:00PM -0400, Andy Gospodarek wrote: > If a smartnic wants to give control of flows to the host > then it makes more sense to allow some communication at a higher layer > so that requests for hardware offload can be easily validated against > some sort of policy set forth by the admin of the smartnic. The important rule is that a PF/VF/SF is always constrained by its representor. It doesn't matter how it handles the packets internally, via a tx/rx ring, via an eswitch offload, RDMA, iscsi, etc, it is all the same as far as the representor is concerned.. Since eswitch is a powerful offload capability it makes sense to directly nest it. Jason