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Sun, 11 Oct 2026 04:29:17 -0700 Received: from vdi.nvidia.com (10.127.8.10) by mail.nvidia.com (10.126.190.181) with Microsoft SMTP Server id 15.2.2562.49 via Frontend Transport; Sun, 11 Oct 2026 04:29:13 -0700 From: Tariq Toukan To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , , Paolo Abeni CC: Alexei Lazar , Carolina Jubran , Dragos Tatulea , Gal Pressman , "Leon Romanovsky" , open list , , Mark Bloch , Saeed Mahameed , Tariq Toukan Subject: [PATCH net-next 0/2] net/mlx5e: Align setdcbx with DCBX capability flags Date: Sun, 11 Oct 2026 14:28:58 +0300 Message-ID: <20261011112900.802150-1-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: DS2PEPF000061C3:EE_|IA1PR12MB6211:EE_ X-MS-Office365-Filtering-Correlation-Id: c1b43b44-279e-4028-9de9-08df278ae498 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|82310400026|36860700016|376014|1800799024|10067099003|18002099003|11063799006|261009223027099003|56012099006; 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)(23010399003)(82310400026)(36860700016)(376014)(1800799024)(10067099003)(18002099003)(11063799006)(261009223027099003)(56012099006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: YzkvHyaOqXVXcxTHjauqdCmyW/QlNh7cIxwTrMF1Uj+mwnOnRtXiE7PPoEvVw5kHO7wauAk0sZJyzCvwGSngZ70NvTnDYcoljMq5b4+BHrRIg/nWRCv3tFnbkzW+v0O5ebB3JYvQNZ24FZd1+8EIbaV6k0MHteIMfUX6Zdf0sTMEIidcRN9uIigARwN5m9WCEvkEDGkUPMmnzh2h7sybOOq9pGanv1nDtRKwQ/Mp0zp7r07VH78+4llaMRNtYn6Q6LQ0cXurIlkWrrIpfqaawKhj9vgI4VKGxeyyh5yzP/gCQIJielNRKkkSKhhlcWGBLrNqHCeT1PxSfHkl0KMDsnlDbIHCAsctEjB3WRlP63GjtxDyjm3NxXFLo17adJAISPtGXQpx9l7c/iv5TmQk9rZGmf/ZhBO+EGApavnwjdZXVkgXcQnoKflj7NiSVnRS X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Oct 2026 11:29:20.2663 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c1b43b44-279e-4028-9de9-08df278ae498 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: DS2PEPF000061C3.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6211 Hi, This series by Alexei aligns the mlx5e DCBX mode handling in the setdcbx DCB callback with the DCBX capability flags. Today mlx5e_dcbnl_setdcbx() applies two different policies: a request of mode 0 switches the firmware to AUTO, while any other request is accepted only if it carries DCB_CAP_DCBX_HOST. Requests with DCB_CAP_DCBX_LLD_MANAGED are rejected outright, even though that flag describes exactly the case where DCBX negotiation is done by the firmware/LLD agent rather than by the host. Patch 1 switches the firmware between HOST and AUTO modes based solely on the DCB_CAP_DCBX_HOST bit, which folds the two code paths into one and removes the dedicated switch-to-host helper. When moving to firmware-controlled mode, CEE, IEEE and LLD_MANAGED are reported together due to a firmware limitation. Patch 2 drops the rejection of DCB_CAP_DCBX_LLD_MANAGED, so that requesting it switches to firmware-controlled DCBX mode. Regards, Tariq Alexei Lazar (2): net/mlx5e: Select DCBX HOST/AUTO from capability flags in setdcbx net/mlx5e: Add DCB_CAP_DCBX_LLD_MANAGED support in setdcbx .../ethernet/mellanox/mlx5/core/en_dcbnl.c | 51 +++++-------------- 1 file changed, 14 insertions(+), 37 deletions(-) base-commit: d8674294aefef02266c4d47ad10131f1bffbe534 -- 2.44.0