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emacs 28.1 From: Petr Machata To: Daniel Machon CC: , , , , , , , , , , , , , , , , , Subject: Re: [PATCH net-next v6 1/6] net: dcb: add new pcp selector to app object Date: Tue, 1 Nov 2022 15:02:39 +0100 In-Reply-To: <20221101094834.2726202-2-daniel.machon@microchip.com> Message-ID: <87edumvkkx.fsf@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.126.230.35] X-ClientProxiedBy: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT005:EE_|DM6PR12MB4284:EE_ X-MS-Office365-Filtering-Correlation-Id: 1c45ed46-0a03-4dc5-c81e-08dabc11cfb0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230022)(4636009)(376002)(396003)(136003)(346002)(39860400002)(451199015)(36840700001)(40470700004)(46966006)(6666004)(5660300002)(7416002)(26005)(2906002)(82740400003)(86362001)(36860700001)(478600001)(82310400005)(54906003)(6916009)(40460700003)(40480700001)(426003)(47076005)(41300700001)(2616005)(356005)(336012)(4326008)(186003)(16526019)(70586007)(70206006)(8676002)(8936002)(83380400001)(7636003)(316002)(36756003);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Nov 2022 14:03:11.0188 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1c45ed46-0a03-4dc5-c81e-08dabc11cfb0 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT005.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4284 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Daniel Machon writes: > Add new PCP selector for the 8021Qaz APP managed object. > > As the PCP selector is not part of the 8021Qaz standard, a new non-std > extension attribute DCB_ATTR_DCB_APP has been introduced. Also two > helper functions to translate between selector and app attribute type > has been added. The new selector has been given a value of 255, to > minimize the risk of future overlap of std- and non-std attributes. > > The new DCB_ATTR_DCB_APP is sent alongside the ieee std attribute in the > app table. This means that the dcb_app struct can now both contain std- > and non-std app attributes. Currently there is no overlap between the > selector values of the two attributes. > > The purpose of adding the PCP selector, is to be able to offload > PCP-based queue classification to the 8021Q Priority Code Point table, > see 6.9.3 of IEEE Std 802.1Q-2018. > > PCP and DEI is encoded in the protocol field as 8*dei+pcp, so that a > mapping of PCP 2 and DEI 1 to priority 3 is encoded as {255, 10, 3}. > > Signed-off-by: Daniel Machon Reviewed-by: Petr Machata