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Tue, 24 Mar 2026 05:31:24 -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 , Chuck Lever , "Matthieu Baerts (NGI0)" , Cosmin Ratiu , "Carolina Jubran" , Daniel Zahka , "Shay Drory" , Kees Cook , Daniel Jurgens , Moshe Shemesh , Adithya Jayachandran , Willem de Bruijn , David Wei , Petr Machata , Stanislav Fomichev , Vadim Fedorenko , , , , , , Gal Pressman , Jiri Pirko Subject: [PATCH net-next V8 14/14] net/mlx5: Document devlink rates Date: Tue, 24 Mar 2026 14:28:48 +0200 Message-ID: <20260324122848.36731-15-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260324122848.36731-1-tariqt@nvidia.com> References: <20260324122848.36731-1-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: MN1PEPF0000ECD9:EE_|LV2PR12MB5751:EE_ X-MS-Office365-Filtering-Correlation-Id: 5270c316-bc1d-48f4-6760-08de89a153c8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|7416014|36860700016|1800799024|22082099003|56012099003|18002099003; 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:(13230040)(82310400026)(376014)(7416014)(36860700016)(1800799024)(22082099003)(56012099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 3U53vmerjCxiqcHdhQQZcwBIjxDiawBOdtHZaZ6ykoY87NqHqh1Hzdm3x0FEKNXQfLPa9D3lmzt+P/mjiCl2XiwXk4ZDPvtrE5vPWYt2pr1zj36Bjq2VUbVZ22aFkX3ZpunmF23JnxV+2D0SY7kTn7EHcmdHh1sOdKJo7uaQzUjc6GeUCvnRwR+6OLmJmbMcNjb+z+FolXLtHRPZfupaBAXMtSEAFnd4HBNluG+jTx6CC0WowXzz7GWeZXKywZk42EF4hmsUdsuH0T6XEB4uNzrgpMXVqEsr9udKFpU2j2qeQmuO2pLXX/mCI7FyrkCp0YwRzTZMAXKilt4BSbEFD90v44Wl22sHRVvrWDutw5aCPcPsEMFNWDM0tXWCD2GUop67R47//SWfLaj/oW8hlUS+gmHzU6qOVwcy3i5D0DglEi06A/QEfDEOs6ql9nlX X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Mar 2026 12:31:51.9508 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5270c316-bc1d-48f4-6760-08de89a153c8 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: MN1PEPF0000ECD9.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV2PR12MB5751 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