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Mon, 22 Jun 2026 04:29:50 -0700 From: Tariq Toukan To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , , Paolo Abeni CC: Alexei Lazar , Carolina Jubran , Leon Romanovsky , , , Mark Bloch , Saeed Mahameed , Tariq Toukan , Gal Pressman Subject: [PATCH net 0/3] net/mlx5e: Report zero bandwidth for non-ETS traffic Date: Mon, 22 Jun 2026 14:29:22 +0300 Message-ID: <20260622112925.624795-1-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 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: DS3PEPF0000C37E:EE_|DM3PR12MB9391:EE_ X-MS-Office365-Filtering-Correlation-Id: 6b05c4fc-3dda-4006-7a72-08ded0519da0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|376014|23010399003|1800799024|11063799006|56012099006|6133799003|18002099003; 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)(36860700016)(82310400026)(376014)(23010399003)(1800799024)(11063799006)(56012099006)(6133799003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: Nw/fQMz03U8LAD8UUP77vdkeWC2V2woax0f6j3VR9kbrdYCNcRG9uqQMyu4d8Z9nbY020Z9DZHdGC4Lqfe2w+ueGK0SZIvAkVRnSoeNauOQV5myijrQf5leMxkyJ6ElcbkuPccowRXMfPDOOQFIWMofWkKvUhAc2LMm+coewB7zLPsYlOOxcmtZKadu+AnAepZ/Bx18BSxxGUHQCDnaeRr6g5ld/mV2+n2oONPQp0NyjGxdhQwg5rPx+QKlJ/qdojdzH0/uFthUhyEf2ub/mC+l+rCbVeXT4BZj0mzGfS3VGmxV+RM6xWdbFR2OF7I2PsIra+pabOghliYFMYp0gWZ9Iy6hIOC5Gz5BSFMdGhGSMPw4D8+z+XJrL4XBy0hdVyVqAyVIo75l7OGCTlve1kzgAm+SDtFb0uR1IO96Zrl+QSGNQAy11IuqMefLQi/C4 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Jun 2026 11:30:08.7188 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6b05c4fc-3dda-4006-7a72-08ded0519da0 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: DS3PEPF0000C37E.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM3PR12MB9391 Hi, The IEEE 802.1Qaz standard restricts bandwidth allocation percentages to Enhanced Transmission Selection (ETS) traffic classes; STRICT, VENDOR, and CB Shaper TSA types carry no bandwidth semantics. Two problems exist in the mlx5e DCBNL ETS implementation: the get path reports 100% bandwidth for all TCs regardless of TSA type due to a hardware limitation, and the set path neither rejects non-zero bandwidth values for non-ETS TCs nor rejects the unsupported CB Shaper TSA altogether. The first issue was introduced by commit 820c2c5e773d ("net/mlx5e: Read ETS settings directly from firmware") and the latter two by commit 08fb1dacdd76 ("net/mlx5e: Support DCBNL IEEE ETS"). This series by Alexei Lazar fixes the get path to report zero bandwidth for non-ETS traffic classes, adds validation to reject non-zero bandwidth for non-ETS TCs on the set path, and rejects CB Shaper TSA configurations that the driver does not support. Regards, Tariq Alexei Lazar (3): net/mlx5e: Report zero bandwidth for non-ETS traffic classes net/mlx5e: Validate bandwidth for non-ETS traffic classes net/mlx5e: Reject unsupported CB Shaper TSA in ETS validation .../ethernet/mellanox/mlx5/core/en_dcbnl.c | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) base-commit: d07d80b6a129a44538cda1549b7acf95154fb197 -- 2.44.0