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Thu, 26 Feb 2026 14:19:22 -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 , Shuah Khan , , , , , , Gal Pressman , Dragos Tatulea , Shay Drory , Jiri Pirko , Moshe Shemesh Subject: [PATCH net-next V3 00/10] devlink: add per-port resource support Date: Fri, 27 Feb 2026 00:19:06 +0200 Message-ID: <20260226221916.1800227-1-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: linux-kernel@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: MN1PEPF0000F0E4:EE_|SA5PPFD8C5D7E64:EE_ X-MS-Office365-Filtering-Correlation-Id: 060234ab-1dcd-4cf5-aa32-08de75852a2b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|376014|7416014|36860700013|13003099007; X-Microsoft-Antispam-Message-Info: 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 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)(82310400026)(376014)(7416014)(36860700013)(13003099007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: rndv18Ltcpo3LPYDDvkPbFcKuGHDK1d9i0qUPDKHl0hCDuSelLuX5pXDusgwenmNoq+46jJg1eCFVdYV6D25kdOssjlLAtX5ymkUn6FGGBh6ABsU+3+O4ofx6+0F0SD5wM04wegN28O80wffUxLcTAPREB5b+JFs3j+rJ80G9rRgp5Us8X0/OXReOolxfP5wnYJFaJUz07WO75lnh0a29Tphp+yb8MoeroCrELVCaTVf/pK8febwc4Tt7G9VZT3pQiJjWRELTvhKmSpe4T7BDoWkevL0Heblktr39RpcaH+H0a4qC7d2j6F9O7Bd+XeEPp3/cDpIyS27CZ8s7BmWiBw0910ybQd6LpLocQJ5HXBvN+KLiRnC0W4SZ1C7N11qvOuarlIep6Io6RTgi/vaRVqReEesHtKXwvJyRL3Zx3ZgBU2sc2vMqc0hJ3DRWWwN X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Feb 2026 22:19:53.0049 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 060234ab-1dcd-4cf5-aa32-08de75852a2b 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: MN1PEPF0000F0E4.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA5PPFD8C5D7E64 Hi, This series adds devlink per-port resource support. See detailed description by Or below [1]. Regards, Tariq [1] Currently, devlink resources are only available at the device level. However, some resources are inherently per-port, such as the maximum number of subfunctions (SFs) that can be created on a specific PF port. This limitation prevents user space from obtaining accurate per-port capacity information. This series adds infrastructure for per-port resources in devlink core and implements it in the mlx5 driver to expose the max_SFs resource on PF devlink ports. Patch #1 adds dump support for device-level resources Patch #2 adds selftest for resource dump Patch #3 adds dump to resource documentation Patch #4 refactors resource functions to be generic Patch #5 adds port-level resource registration infrastructure Patch #6 adds port resource netlink command Patch #7 registers SF resource on PF port representor in mlx5 Patch #8 adds devlink port resource registration to netdevsim for testing Patch #9 adds selftest for devlink port resources Patch #10 documents port-level resources With this series, users can query per-port resources: $ devlink port resource show pci/0000:03:00.0/196608 pci/0000:03:00.0/196608: name max_SFs size 20 unit entry $ devlink port resource show pci/0000:03:00.0/196608: name max_SFs size 20 unit entry pci/0000:03:00.1/262144: name max_SFs size 20 unit entry Userspace patches for iproute2: https://github.com/ohartoov/iproute2/tree/port_resource V3: - Add dump command for device-level resources. - Fix selftest to expect the "test_resource" registered by netdevsim instead of max_SFs. - Use a single netlink fill function for both device-level and port-level resources. - Fix documentation to refer to the GET command (kernel/netlink perspective) instead of show. - Link to V2: https://lore.kernel.org/all/20260205142833.1727929-1-tariqt@nvidia.com/ Or Har-Toov (10): devlink: Add dump support for device-level resources selftest: netdevsim: Add resource dump test devlink: Add dump to resource documentation devlink: Refactor resource functions to be generic devlink: Add port-level resource registration infrastructure devlink: Add port resource netlink command net/mlx5: Register SF resource on PF port representor netdevsim: Add devlink port resource registration selftest: netdevsim: Add devlink port resource test devlink: Document port-level resources Documentation/netlink/specs/devlink.yaml | 29 +- .../networking/devlink/devlink-resource.rst | 60 ++- .../net/ethernet/mellanox/mlx5/core/devlink.h | 4 + .../mellanox/mlx5/core/esw/devlink_port.c | 37 ++ drivers/net/netdevsim/dev.c | 23 +- drivers/net/netdevsim/netdevsim.h | 4 + include/net/devlink.h | 10 +- include/uapi/linux/devlink.h | 3 + net/devlink/devl_internal.h | 4 + net/devlink/netlink.c | 2 +- net/devlink/netlink_gen.c | 49 ++- net/devlink/netlink_gen.h | 8 +- net/devlink/port.c | 3 + net/devlink/resource.c | 366 +++++++++++++++--- .../drivers/net/netdevsim/devlink.sh | 53 ++- 15 files changed, 581 insertions(+), 74 deletions(-) base-commit: 90fcb0f3bc5ab67773b35030af68ed8c6bd83e1c -- 2.44.0