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Tue, 25 Nov 2025 12:07:51 -0800 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Donald Hunter , Jiri Pirko , Jonathan Corbet , Saeed Mahameed , "Leon Romanovsky" , Tariq Toukan , Mark Bloch , , , , , Gal Pressman , Moshe Shemesh , Carolina Jubran , Cosmin Ratiu , Jiri Pirko , Randy Dunlap Subject: [PATCH net-next V4 14/14] net/mlx5: Document devlink rates Date: Tue, 25 Nov 2025 22:06:13 +0200 Message-ID: <1764101173-1312171-15-git-send-email-tariqt@nvidia.com> X-Mailer: git-send-email 2.8.0 In-Reply-To: <1764101173-1312171-1-git-send-email-tariqt@nvidia.com> References: <1764101173-1312171-1-git-send-email-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00001CE2:EE_|SJ1PR12MB6244:EE_ X-MS-Office365-Filtering-Correlation-Id: 7fe961fe-5fd8-4ad0-6cbe-08de2c5e628f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|82310400026|376014|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?VMBTZMJ/nFsodT+BaLUKQcXdKq7F4O4d5fDlDG07Xa219d2h9gP21hqXqoBf?= =?us-ascii?Q?DMIN9++tQvtfNdGggMRSUNN8uh+83B9XyJ4Zo9j1Sh6GqeFEJDUt3jQWdxes?= =?us-ascii?Q?QcjgbgngPZmJJ0oK+smFgg8YGJA15TR4XyfTJhUACmJUxhgxcJdNMAPqOABg?= =?us-ascii?Q?do8/rEI32yGFBvv3Yh1aVg03qU5ZS+hcuP92t4e822BIby8ocznfWzCXwMS2?= =?us-ascii?Q?qfHMymQtbBhPv3+Vh3/rGu0belVibY0jyyqzIlE7b9JampqYRAMOvVXramwK?= =?us-ascii?Q?FwNHvlTBY1drmttC93Ek6hCBFBAPPpzD7MswWNwVeQgszMglpUMI4Afy+ZOQ?= =?us-ascii?Q?4//S6K2GQaIP1RRZ1D/VbPB1qejmyqN8taRAldLzhSxUxmSIzDQ23HDX+XNQ?= =?us-ascii?Q?jRjlRNCAxhFnLq+exk6U8LC85OLW4Su436f5S4Oo6Ldi8hCUAOraCHxJGiZV?= =?us-ascii?Q?0SUKw7FcVIpcTdj511zjyTV2qmKW0VTrHgHT4Gv+80+FgB8xprzuaNfQR1/V?= =?us-ascii?Q?KDH7tefn2VXt2U57U6trKU4bkSqrfF8ktx72K7sXV+O5AS2m+UmCLpcQWPy7?= =?us-ascii?Q?wv9Qf7/IcTTBR1Nn6nHYrwKSpk0lyPGL/mzjx12n879kPXhGMEwnlIqEWOr8?= =?us-ascii?Q?m6Z7rwK/1BWIMQYI2ISCKLkXdamuS6eSjLu86GxS+fsoR5P5AhedOpERWJVx?= =?us-ascii?Q?ID+y9hKqGHrrHEw5TJYNcgvHRAHlnzqB5iz+5mJOfcuLLf4V5RdhlDgMv6k8?= =?us-ascii?Q?62MsliaLvmFkiAMGDjMrrbd+VapAs1uTsmjAiJhOVk8e/2a0pPLXnB40HRuU?= =?us-ascii?Q?/twtr4Zwnt+7xtNRQyF2EwmX9Y7GOn4VYdDG5mWdOhtMKbYQqWoIfaNJuV/B?= =?us-ascii?Q?0NL0alaMDVLCXbjKHowZJiGho0iClldsxEwcsq263JMgh18NmPAZIwN9rs4l?= =?us-ascii?Q?GLpETRRA+/7wmmQv3OeZk/kPAR6RxVD3XHcGuvM7t+DrympfvyoOIJDOQwyI?= =?us-ascii?Q?ezekt6aSZjlhkv0ImsM2bpfmzyiowOBiGeKCwn3UIyNI7VIfkdYwPUOs7NCT?= =?us-ascii?Q?eodoQkYua6UeLTSi2rkGcw/5xFCo8zVdFI42wQdW1Q0mGP5R6zWpXgEgKbYt?= =?us-ascii?Q?LmMnxoZPSXN7Dp7PWgy1upM0bbB3+rkwTqCh0+yk4U5/pdhS5YcQsg+k6KCt?= =?us-ascii?Q?f1PW9SmNW+ZeYyVR2JwIWaT35HVIMzWSTXeOBQMqnOQy6vXaZpujCtttrg1B?= =?us-ascii?Q?zOzM81BFQty1Uykm7CbUAmHa0LpVIYIrWnrUPFoRwi9fv9HsfUR/PIETcwiN?= =?us-ascii?Q?EWocfjk8AsyBX5DD6cm2bOhJUs5XeElnk1AUF3CydL9Sn3vfjH+DIPzyttL1?= =?us-ascii?Q?Fewtyt2YVyNhTJfw2Ff65fCA6Jh2PF3K5s5a1/kty20nGZlUDqqV2dz1JHgq?= =?us-ascii?Q?SErBS0vapIQcivSjgoz2PQj4gi/795UOSdSx4mwDor4oXYiZlFX4EPs1ObXt?= =?us-ascii?Q?l7NOwgeceP2xLxsblgtGMac/HSkZX3L3rFNEap2DUeG8rzaTNTxK7ibdeHVw?= =?us-ascii?Q?GG35B9O1ZAPFhUjIKtM=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(82310400026)(376014)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Nov 2025 20:08:22.3924 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7fe961fe-5fd8-4ad0-6cbe-08de2c5e628f X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CE2.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR12MB6244 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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/netw= orking/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: =20 .. note:: This command can run over all interfaces such as PF/VF and representor = ports. + +Rates +=3D=3D=3D=3D=3D + +mlx5 devices can limit transmission of individual VFs or a group of them v= ia +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 firs= t 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_s= hare 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/000= 0:82:00.0/group1 --=20 2.31.1