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charset=UTF-8 Date: Thu, 27 Feb 2025 15:06:58 -0800 Message-Id: Cc: "Greg KH" , "Jason Gunthorpe" , "Danilo Krummrich" , "Joel Fernandes" , "Alexandre Courbot" , "Gary Guo" , "Joel Fernandes" , "Boqun Feng" , "Ben Skeggs" , , , , , Subject: Re: [RFC PATCH 0/3] gpu: nova-core: add basic timer subdevice implementation From: "John Hubbard" To: "Dave Airlie" X-Mailer: aerc 0.20.1-0-g2ecb8770224a References: <2f062199-8d69-48a2-baa6-abb755479a16@nvidia.com> <20250225210228.GA1801922@joelnvbox> <20250225225756.GA4959@nvidia.com> <20250226004916.GB4959@nvidia.com> <20250226172120.GD28425@nvidia.com> <20250226234730.GC39591@nvidia.com> <2025022644-fleshed-petite-a944@gregkh> In-Reply-To: X-ClientProxiedBy: BYAPR05CA0032.namprd05.prod.outlook.com (2603:10b6:a03:c0::45) To LV2PR12MB5968.namprd12.prod.outlook.com (2603:10b6:408:14f::7) Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5968:EE_|MN0PR12MB5762:EE_ X-MS-Office365-Filtering-Correlation-Id: cfec91ab-675c-444e-342a-08dd5783712b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|1800799024|376014|366016; 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Maybe at this point in the discussion it would help to discern between nova-core and nova-drm: drivers/gpu/nova-core/ (under discussion here) drivers/gpu/drm/nova/ (Future) ...keeping in mind that nova-core will be used by other, non-DRM things, notably VFIO. > > DRM has reasons for doing what drm does, that is a separate discussion > of how a rust driver fits into the DRM. The rust code has to conform > to the C expectations for the subsystems they are fitting into. > > The drm has spent years moving things to devm/drmm type constructs, > adding hotplug with the unplug mechanisms, but it's a long journey and > certainly not something nova would want to wait to reconstruct from > scratch. ack. thanks, John Hubbard