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Thu, 29 May 2025 07:21:18 +0000 Message-ID: Date: Thu, 29 May 2025 10:21:12 +0300 User-Agent: Mozilla Thunderbird Subject: Re: [Intel-wired-lan] [PATCH iwl-next v3 4/7] igc: assign highest TX queue number as highest priority in mqprio To: "Abdul Rahim, Faizal" , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vladimir Oltean CC: , , , Simon Horman , Faizal Rahim , Aleksandr Loktionov , Chwee-Lin Choong References: <20250519071911.2748406-1-faizal.abdul.rahim@intel.com> <20250519071911.2748406-5-faizal.abdul.rahim@intel.com> Content-Language: en-US From: Mor Bar-Gabay In-Reply-To: <20250519071911.2748406-5-faizal.abdul.rahim@intel.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: TL2P290CA0017.ISRP290.PROD.OUTLOOK.COM (2603:1096:950:3::7) To CY5PR11MB6307.namprd11.prod.outlook.com (2603:10b6:930:21::20) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY5PR11MB6307:EE_|LV8PR11MB8461:EE_ X-MS-Office365-Filtering-Correlation-Id: 05adc9ca-a266-4f8a-9d4f-08dd9e8167cb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|7416014|376014|921020; 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A queue mapped to TC 3 had higher priority than one mapped to > TC 0. > > To improve code reuse for upcoming patches and align with typical NIC > behavior, this patch updates the logic to prioritize higher queue numbers > when mqprio is used. As a result, queue 0 becomes the lowest priority and > queue 3 becomes the highest. > > This patch also introduces igc_tsn_is_tc_to_queue_priority_ordered() to > preserve the original TC-based priority rule and reject configurations > where a higher TC maps to a lower queue offset. > > Reviewed-by: Simon Horman > Signed-off-by: Faizal Rahim > --- > drivers/net/ethernet/intel/igc/igc_main.c | 19 ++++++++++++ > drivers/net/ethernet/intel/igc/igc_tsn.c | 35 ++++++++++++++--------- > 2 files changed, 41 insertions(+), 13 deletions(-) > Tested-by: Mor Bar-Gabay