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Fri, 17 Jul 2026 00:51:39 -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 , Pavan Chebbi , Saeed Mahameed , Tariq Toukan , Gal Pressman Subject: [PATCH net V2 0/2] net/mlx5e: Report zero bandwidth for non-ETS traffic Date: Fri, 17 Jul 2026 10:51:23 +0300 Message-ID: <20260717075125.1244877-1-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: SA2PEPF000015CC:EE_|MN0PR12MB5811:EE_ X-MS-Office365-Filtering-Correlation-Id: 7d113c27-0b60-4ef2-6f98-08dee3d84579 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|376014|7416014|82310400026|23010399003|1800799024|13003099007|6133799003|56012099006|11063799006|10067099003|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)(376014)(7416014)(82310400026)(23010399003)(1800799024)(13003099007)(6133799003)(56012099006)(11063799006)(10067099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: f0V7Sxp+Vd8DLkl9awlXYqV6ofLRH/dqHOExAE460q6NIMeFf52R7/P9GmFLsdevZIcM5jEtekuAgWeAWGzvhVjImzh8dF5fsf3Y1cJETeYv8GIdcMIzHGWQkZSIOC1YKkOwPBMaJzQh1/DYt5CK9UwoY2arfXCjaBvN5l2KlscgJkD2skdSDn8Gi399NhFlAFmR0a4wQnhHqy9b06G02Z9EwAUG1nTsVlhllMMJ6qO+H1iS4UIdkCc0mbZ/2Ixjiv8uBACgM7sBXKoDNrGYIxLiFkQz/aEnO5vi6zaCrAGbzzzrQ827YtZV1c6zmXxZyn855SOcTA6vnygEe2HkAdeBC7mbHp4wzus/GIr53Op3KKjS0uULk2lHqkZFW6+h6IKB8Vlts8jqLIpq1I0+B6voYFmEgvYqLDNaawGMsPyJV1g58MvXYCHswYkmyHfK X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jul 2026 07:51:54.9858 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7d113c27-0b60-4ef2-6f98-08dee3d84579 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: SA2PEPF000015CC.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5811 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, introduced by commit 820c2c5e773d ("net/mlx5e: Read ETS settings directly from firmware"), and the set path does not reject the unsupported CB Shaper TSA, introduced 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, and rejects CB Shaper TSA configurations that the driver does not support. Regards, Tariq V2: - Dropped patch 2 "net/mlx5e: Validate bandwidth for non-ETS traffic classes" (Jakub). We'll submit a more generic version of it. V1: https://lore.kernel.org/all/20260622112925.624795-1-tariqt@nvidia.com/ Alexei Lazar (2): net/mlx5e: Report zero bandwidth for non-ETS traffic classes net/mlx5e: Reject unsupported CB Shaper TSA in ETS validation .../net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) base-commit: 3f1f755366687d051174739fb99f7d560202f60b -- 2.44.0