From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DC6CECD3420 for ; Mon, 2 Sep 2024 16:40:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D827110E0C7; Mon, 2 Sep 2024 16:40:06 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; secure) header.d=ffwll.ch header.i=@ffwll.ch header.b="GPc+GU9W"; dkim-atps=neutral Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) by gabe.freedesktop.org (Postfix) with ESMTPS id A187810E0C7 for ; Mon, 2 Sep 2024 16:40:05 +0000 (UTC) Received: by mail-wm1-f52.google.com with SMTP id 5b1f17b1804b1-42bb8cf8abeso34938715e9.2 for ; Mon, 02 Sep 2024 09:40:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; t=1725295204; x=1725900004; darn=lists.freedesktop.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=Qxn7jDrhXcDat8mwJsxtE8edha00W1MVu07WpvK7c6k=; b=GPc+GU9Wjzn7ndaC8N51FtYvnvUnU4/eRQUEjWlxl/5Urp2rAzpVvnEPsY4WIoUWp8 iszIsbNeM9nEqtDK2GPUp2exTTZJM4PLPCam+XZl4eHLKlFCSW7IikWF/2faaYlEWrvy +wZXcd6QD6whXvnHZwYnsP787jvzF1IH6YYgU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725295204; x=1725900004; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Qxn7jDrhXcDat8mwJsxtE8edha00W1MVu07WpvK7c6k=; b=JzF+pLHsEaadl8iYA2f7SInXA9ZPU5UFgtWgqhmq/uNbTie3fDVZWaJHzmPIEGRcn2 clzUMASQovBL3YjVtKPHOY+Vo2R4BtRzmJbFgurH4MDkpUPgDtNTwnd7OAPl6ti5eyH3 H68N2mHFNBo4KS1/97d7XK6ewESL7Hsm4yOGXnboNxWYTeJLwx75GXSZR+UWuLJaezXH atY/+JPoP5n+46lYCF7pNoumsgiJCB5og4mEzu9Ocur3J6usrvRkgmR1gSvHbVF1hmS4 4Zu2thpkVVS1A5BBhVPaADy+BR3vQw6GGHKGgP+gkZbj0twA96JDGLkdvun2NlBWnmeN 19WA== X-Forwarded-Encrypted: i=1; AJvYcCXi9YwrDo4gL5VqYUBMrBljm2tokLf7cmf0YrQKhWvPsnuMUer1os/oTbblkSpQms+8BH5cJrTVsxw=@lists.freedesktop.org X-Gm-Message-State: AOJu0YxAN80XYMLPTpe8o+PvnmErfo2McRvkU1PoyOvy7fOd7EPhHTIm JLYQPc3cGle2OqhKwu1KI753yQaceKiFJDGUNvHmT8nw5etJwcUpZ+LFVG0O1G8= X-Google-Smtp-Source: AGHT+IGE14ktT1PD1qJMhFnhMzNGipg0c4D+FGJxtT3YeSHoyJQBt14wG1cM+FJZoDWCYkaSr3vGdg== X-Received: by 2002:a05:600c:1d89:b0:427:fa39:b0db with SMTP id 5b1f17b1804b1-42bb01e5bffmr114062755e9.27.1725295203677; Mon, 02 Sep 2024 09:40:03 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:5485:d4b2:c087:b497]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42bacaac810sm162739935e9.33.2024.09.02.09.40.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Sep 2024 09:40:03 -0700 (PDT) Date: Mon, 2 Sep 2024 18:40:00 +0200 From: Daniel Vetter To: Danilo Krummrich Cc: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, ojeda@kernel.org, alex.gaynor@gmail.com, wedsonaf@gmail.com, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, benno.lossin@proton.me, a.hindborg@samsung.com, aliceryhl@google.com, lina@asahilina.net, pstanner@redhat.com, ajanulgu@redhat.com, lyude@redhat.com, gregkh@linuxfoundation.org, robh@kernel.org, daniel.almeida@collabora.com, rust-for-linux@vger.kernel.org, dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org Subject: Re: [PATCH v2 0/8] DRM Rust abstractions and Nova Message-ID: References: <20240618233324.14217-1-dakr@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240618233324.14217-1-dakr@redhat.com> X-Operating-System: Linux phenom 6.9.12-amd64 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Wed, Jun 19, 2024 at 01:31:36AM +0200, Danilo Krummrich wrote: > This patch series implements some basic DRM Rust abstractions and a stub > implementation of the Nova GPU driver. > > Nova is intended to be developed upstream, starting out with just a stub driver > to lift some initial required infrastructure upstream. A more detailed > explanation can be found in [1]. > > This patch series is based on the "Device / Driver and PCI Rust abstractions" > series [2]. > > The DRM bits can also be found in [3] and the Nova bits in [4]. > > Changes in v2: > ============== > - split up the DRM device / driver abstractions in three separate commits > - separate `struct drm_device` abstraction in a separte source file more > cleanly > - switch `struct drm_driver` and `struct file_operations` to 'static const' > allocations > - implement `Registration::new_foreign_owned` (using `Devres`), such that we > don't need to keep the `Registration` alive on the Rust side, but > automatically revoke it on device unbind > - add missing DRM driver features (Rob) > - use `module_pci_driver!` macro in Nova > - use a const sized `pci::Bar` in Nova > - increase the total amount of Documentation, rephrase some safety comments and > commit messages for less ambiguity > - fix compilation issues with some documentation example > > [1] https://lore.kernel.org/dri-devel/Zfsj0_tb-0-tNrJy@cassiopeiae/T/#u > [2] Reply to this mail titled "Device / Driver and PCI Rust abstractions". > [3] https://gitlab.freedesktop.org/drm/misc/kernel/-/tree/topic/rust-drm > [4] https://gitlab.freedesktop.org/drm/nova/-/tree/nova-next Ok finally stopped dragging my feet on this, went through my old comments, looked at stuff again, and wrote some replies. I think all but the question around type safety for drm_driver->features can be sorted out post-merge, when we have a driver that needs it. The feature flags stuff I think essentially makes the current abstraction unsafe, and you can blow up when constructing a new drm::Device instance if you're creative enough I think. Cheers, Sima > > Asahi Lina (4): > rust: drm: ioctl: Add DRM ioctl abstraction > rust: Add a Sealed trait > rust: drm: file: Add File abstraction > rust: drm: gem: Add GEM object abstraction > > Danilo Krummrich (4): > rust: drm: add driver abstractions > rust: drm: add device abstraction > rust: drm: add DRM driver registration > nova: add initial driver stub > > MAINTAINERS | 10 + > drivers/gpu/drm/Kconfig | 2 + > drivers/gpu/drm/Makefile | 1 + > drivers/gpu/drm/nova/Kconfig | 12 + > drivers/gpu/drm/nova/Makefile | 3 + > drivers/gpu/drm/nova/driver.rs | 85 +++++++ > drivers/gpu/drm/nova/file.rs | 70 ++++++ > drivers/gpu/drm/nova/gem.rs | 50 ++++ > drivers/gpu/drm/nova/gpu.rs | 173 ++++++++++++++ > drivers/gpu/drm/nova/nova.rs | 18 ++ > include/uapi/drm/nova_drm.h | 101 ++++++++ > rust/bindings/bindings_helper.h | 5 + > rust/helpers.c | 23 ++ > rust/kernel/drm/device.rs | 182 ++++++++++++++ > rust/kernel/drm/drv.rs | 199 ++++++++++++++++ > rust/kernel/drm/file.rs | 116 +++++++++ > rust/kernel/drm/gem/mod.rs | 409 ++++++++++++++++++++++++++++++++ > rust/kernel/drm/ioctl.rs | 153 ++++++++++++ > rust/kernel/drm/mod.rs | 9 + > rust/kernel/lib.rs | 7 + > rust/uapi/uapi_helper.h | 2 + > 21 files changed, 1630 insertions(+) > create mode 100644 drivers/gpu/drm/nova/Kconfig > create mode 100644 drivers/gpu/drm/nova/Makefile > create mode 100644 drivers/gpu/drm/nova/driver.rs > create mode 100644 drivers/gpu/drm/nova/file.rs > create mode 100644 drivers/gpu/drm/nova/gem.rs > create mode 100644 drivers/gpu/drm/nova/gpu.rs > create mode 100644 drivers/gpu/drm/nova/nova.rs > create mode 100644 include/uapi/drm/nova_drm.h > create mode 100644 rust/kernel/drm/device.rs > create mode 100644 rust/kernel/drm/drv.rs > create mode 100644 rust/kernel/drm/file.rs > create mode 100644 rust/kernel/drm/gem/mod.rs > create mode 100644 rust/kernel/drm/ioctl.rs > create mode 100644 rust/kernel/drm/mod.rs > > > base-commit: 6646240d29b11de3177f71ff777d0ae683c32623 > -- > 2.45.1 > -- Simona Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch