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Thu, 26 Mar 2026 00:02:52 -0700 Received: from vdi.nvidia.com (10.127.8.10) by mail.nvidia.com (10.126.190.181) with Microsoft SMTP Server id 15.2.2562.20 via Frontend Transport; Thu, 26 Mar 2026 00:02:42 -0700 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Donald Hunter , Simon Horman , Jiri Pirko , Jonathan Corbet , Shuah Khan , Saeed Mahameed , "Leon Romanovsky" , Tariq Toukan , Mark Bloch , Shuah Khan , Chuck Lever , "Matthieu Baerts (NGI0)" , Carolina Jubran , Cosmin Ratiu , Dragos Tatulea , Jacob Keller , Shahar Shitrit , "Daniel Zahka" , Parav Pandit , "Adithya Jayachandran" , Kees Cook , "Shay Drori" , Daniel Jurgens , Moshe Shemesh , Willem de Bruijn , David Wei , Petr Machata , Stanislav Fomichev , Daniel Borkmann , Joe Damato , Nikolay Aleksandrov , Vadim Fedorenko , "Michael S. Tsirkin" , "Antonio Quartulli" , Allison Henderson , Bui Quang Minh , Nimrod Oren , , , , , , Gal Pressman , Jiri Pirko Subject: [PATCH net-next V9 14/14] net/mlx5: Document devlink rates Date: Thu, 26 Mar 2026 08:59:49 +0200 Message-ID: <20260326065949.44058-15-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260326065949.44058-1-tariqt@nvidia.com> References: <20260326065949.44058-1-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF00004FC1:EE_|BY5PR12MB4131:EE_ X-MS-Office365-Filtering-Correlation-Id: cc76f1b5-2d45-4ad4-4655-08de8b05b826 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|36860700016|376014|7416014|22082099003|18002099003|56012099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(82310400026)(36860700016)(376014)(7416014)(22082099003)(18002099003)(56012099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: VDhU6Ehv6fNYizwKz3ycwBNoUD+rxPrJDaabZYFuXbQ7/a1PyEG40r2QPecpJR+7YOs5EsRcIJpw9i/xOme5blaXNJXx8uFV4SCznCG/dxopoh7GoUJOqJ91Ro8HzGTQl4bplB8UfvD4jqPJxeomSz3PY5ZNfIEJqC+QzGTMjWaf3AVsMutP5VWaQvBeZfq7+NHqzyqsTUxR3pO4tV9qloIUROPmgTMync4GJoZnpUljCuO+tlRStM8bG6VgaeDoDZotGKsw8PhfxHyebHwG0buClPrW1Xj23Bq8mZvX5vZnr1SCvPJu7KN7txSI/1QXqYBoqb2GXV71ihQZO3MNZKIekqesU9rQxINL9JR1Pz58KdT/4xZkk5R/KxyK8mkQ1byalBroHwoDUm+1BIeMTaqM7b3z85KE8q4GX87P8vmOTVHPQ+sZVFXvn6rdN/mU X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Mar 2026 07:03:01.2209 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cc76f1b5-2d45-4ad4-4655-08de8b05b826 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF00004FC1.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4131 From: Cosmin Ratiu It seems rates were not documented in the mlx5-specific file, so add examples on how to limit VFs and groups and also provide an example of the intended way to achieve cross-esw scheduling. Signed-off-by: Cosmin Ratiu Reviewed-by: Carolina Jubran Signed-off-by: Tariq Toukan --- Documentation/networking/devlink/mlx5.rst | 33 +++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/Documentation/networking/devlink/mlx5.rst b/Documentation/networking/devlink/mlx5.rst index 4bba4d780a4a..62c4d7bf0877 100644 --- a/Documentation/networking/devlink/mlx5.rst +++ b/Documentation/networking/devlink/mlx5.rst @@ -419,3 +419,36 @@ User commands examples: .. note:: This command can run over all interfaces such as PF/VF and representor ports. + +Rates +===== + +mlx5 devices can limit transmission of individual VFs or a group of them via +the devlink-rate API in switchdev mode. + +User commands examples: + +- Print the existing rates:: + + $ devlink port function rate show + +- Set a max tx limit on traffic from VF0:: + + $ devlink port function rate set pci/0000:82:00.0/1 tx_max 10Gbit + +- Create a rate group with a max tx limit and adding two VFs to it:: + + $ devlink port function rate add pci/0000:82:00.0/group1 tx_max 10Gbit + $ devlink port function rate set pci/0000:82:00.0/1 parent group1 + $ devlink port function rate set pci/0000:82:00.0/2 parent group1 + +- Same scenario, with a min guarantee of 20% of the bandwidth for the first VFs:: + + $ devlink port function rate add pci/0000:82:00.0/group1 tx_max 10Gbit + $ devlink port function rate set pci/0000:82:00.0/1 parent group1 tx_share 2Gbit + $ devlink port function rate set pci/0000:82:00.0/2 parent group1 + +- Cross-device scheduling:: + + $ devlink port function rate add pci/0000:82:00.0/group1 tx_max 10Gbit + $ devlink port function rate set pci/0000:82:00.1/32769 parent pci/0000:82:00.0/group1 -- 2.44.0