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Miller" , Nicolas Ferre , Alexandre Belloni , Claudiu Beznea , Koichiro Den , Niklas Cassel , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-nvme@lists.infradead.org, mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev Subject: Re: [PATCH 1/8] dmaengine: Add API to combine configuration and preparation (sg and single) Message-ID: References: <20251208-dma_prep_config-v1-0-53490c5e1e2a@nxp.com> <20251208-dma_prep_config-v1-1-53490c5e1e2a@nxp.com> <20251209063809.GA27728@lst.de> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251209063809.GA27728@lst.de> X-ClientProxiedBy: SJ0PR05CA0201.namprd05.prod.outlook.com (2603:10b6:a03:330::26) To DU2PR04MB8951.eurprd04.prod.outlook.com (2603:10a6:10:2e2::22) Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU2PR04MB8951:EE_|PR3PR04MB7404:EE_ X-MS-Office365-Filtering-Correlation-Id: cc4208ce-a286-4d85-bb74-08de373a4936 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|52116014|7416014|376014|19092799006|366016|1800799024|38350700014; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?TBvHRa26AHqgoTwZdQ4Lfw9SjP1E2CjGBRGtS/0mXt+s07YypGyVwh5dOleW?= =?us-ascii?Q?r/eWAXdQmXYCPLd/fr2UAdIA6tIbMT5AhpSUGUuVR5FLmGTXwq063uiFBaKV?= =?us-ascii?Q?0YkFmKGfchujS+io+1wMuHW19v3XDvk0LEIKy4HyVxBb3iAnIxuneqOcAO60?= =?us-ascii?Q?FS4j7Ztk5gKncdveiVkrtXhXeIc4s5xjEdqM0yH8qWFk6Qu/LOv7ajDL2wUd?= =?us-ascii?Q?9y5Te4cLj1/eqRSJefsiih2hl/PaqetLPeQEzHMMOS6jLSCnygLvVehFyyOR?= =?us-ascii?Q?CVm9RUjo4cF/BKX27KG0Qxs2VKz8O7VdCdF65oK++QSqTbjlLhwtOcMfDeuN?= =?us-ascii?Q?HVb+xQ7u0UkasKS30qKESArgD+VIvkydVPAYjs/PlmJzubV2KpYeat8Yq7Lz?= =?us-ascii?Q?vWFMFP+eKCJ9JK/SCXL+wZZQBiZ1l4n69MSddnCZoOj1uUlIyOaTyYNAzYWk?= =?us-ascii?Q?7vb3eu6wmwCfsVPCYIIppdcec1amoK5cjM7D5ismLD0rxf6MNQBDYlVAS1Pz?= =?us-ascii?Q?LGJ239Ujp9eEX+6lkYuXjdRQKTphJfOTO1/uKbyn0k2Hq4AmwKheCzWf+IV+?= =?us-ascii?Q?trSi5Kk8tcDRnpD5iohSDiTBq8Ld6t3mzppOs9KQ/7ct+xd3uBZBhg8YjXpF?= =?us-ascii?Q?fI/6Ox7c95wHB0/Boo7l+F+h7Rzq3pucf/5UGc7biaCWrSk3zvEcHwnfP80f?= =?us-ascii?Q?TuX+zqmkVSGoM0CsYvMBj2iL24o2tvgaenZwEMfBFB4ST6rxDdK6WHgzp44C?= =?us-ascii?Q?cqJ2k75B5jO/XmkuYeJbLM7s+Io6uwnMPs9+cRMGXAGwloVnIZwYr7tBRljB?= =?us-ascii?Q?jRjMoxvdskM1I63eHRB03/33IjcLbaihnpm5O5AywE9YHaxkz917xq1kaTUy?= =?us-ascii?Q?Iwzfhm8yHVLuvCQJ7Fflgmd6/PxjZ12DgQh3Bo1R5WOTYlxVt49VKnvW6ddS?= =?us-ascii?Q?zDikAu7H2waQmTWw/l6op5rHonjHMBzVionUqJVKohaH3yaSwibjDjecfrEi?= =?us-ascii?Q?yQ8bNVuyN7hjqrCtDHDxr9l1L1TaB+HoHkFKdmtf47hfYauzeqDbGlxTfs0T?= =?us-ascii?Q?L8kB13Y0JCEB7adnjRMKlv4bey5QHnlMcL0WOnIk2pL73snHeZhf+B1IhylZ?= =?us-ascii?Q?rKdn4DUMBxneyIECMsvZ36DuZXKgAcuOFhTOkfCapnlKyR72ZftpxBnmfyN1?= =?us-ascii?Q?5g8WDESf/16uEA6wv3/FiBzy/2//2T9vnVreck8O7QJA/xgSLRdoW3VP/hQj?= =?us-ascii?Q?Q+7yTTrXjDp0OcVwrNco9HHq9ZYERDtkcpTMe+a2xxgJ1MPo36dy3GAV7ZCO?= =?us-ascii?Q?4PasnRb7vuomFMHSjoKNl8q1hZcMjIE4Az1/K5qMgj0crbtHK4p7kzPz5MnI?= =?us-ascii?Q?ob847z/nWXHpJ5qQ92YH5te/Ns/2sdbHN/t81OvuLI6bUSxvoVwRMJDtjd1R?= =?us-ascii?Q?cB9i82Izg8VEDiM4aadnz4Wgohusta78c9ooj/tETJd1oy30/sjp1cXFN/D7?= =?us-ascii?Q?7D+LSSj3dYlz1qyHnAC9lS0tqbofWyzZjQjGfAUuSUcpLL+lUe9LH36qkGC7?= =?us-ascii?Q?wTQy1khhSYvLvacvjtKiU0jrkVfY1bUH4fBB9aef?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: cc4208ce-a286-4d85-bb74-08de373a4936 X-MS-Exchange-CrossTenant-AuthSource: DU2PR04MB8951.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Dec 2025 15:47:41.6689 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: igtPwsRjrTvXuW8RmO9YWdsJD6GlN5qpRLcBFst/LW+tPYkxekByt/UgKE2qS2zyc45jnfY+PF9Eay/9X1jwSw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PR3PR04MB7404 On Tue, Dec 09, 2025 at 07:38:09AM +0100, Christoph Hellwig wrote: > On Mon, Dec 08, 2025 at 12:09:40PM -0500, Frank Li wrote: > > Previously, configuration and preparation required two separate calls. This > > works well when configuration is done only once during initialization. > > > > However, in cases where the burst length or source/destination address must > > be adjusted for each transfer, calling two functions is verbose and > > requires additional locking to ensure both steps complete atomically. > > > > Add a new API and callback device_prep_slave_sg_config that combines > > configuration and preparation into a single operation. If the configuration > > argument is passed as NULL, fall back to the existing implementation. > > Maybe this would be a good time to start retiring the "slave" naming > and come up with shorter names as a win-win situation? Yes, 'prep_sg_config' or 'prep_sg' should be enough. Frank >