From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D46DD346777 for ; Fri, 20 Mar 2026 23:37:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774049827; cv=none; b=I3d0kw/llFVu8gO1wlt+j8rvH86C7RhqAD9fwkiZKDEap9hcTiJhuIw/P6CyJl51l13O30A3kpFHmQNP994CL3uok/UHTJY1yvIuYSDOLECYmEnSyda5nukY6BLrObISoslAKOQtTq/CBWq59n8wc5hqbzxdAkf8Z6bE5C0dfP8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774049827; c=relaxed/simple; bh=Lq/Ga7NNTFEu6sXu9geeqc+kiBT/8M36TEJ943bRBsU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=OBcRpOZo1gGqTj/gKf+rsVxfEq0algOPFpt3B9DquZNViXBanXVZTjlNXzv6o2+rscs4Ith2c7ejno/2LYWis83GKgcr59wU5PMvx52gypx4yG7+YZvO8Za+xYXXl0BVnqt8T9OhzaamBUMWmpT/4qcTGvMqnCVf/R0bdYUlGGQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=c+sL3zbH; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="c+sL3zbH" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1774049824; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=eGS+bPTCCnx2OfxFYkphRjFLuxpr51ULITK831fZk4E=; b=c+sL3zbHDYLKdrKQLxhd4+BDmsS1oNa3GCHrNKGdpU3mxl+Cr7oT5nKlCUN0XMjU4P0HQy 1lEcTYmZvQVMQfW4MQIjcLPaibU+Wym1kCERCiU81o4EMhOiQyABrg861eDqc5+8CRWuKd EQSKidkLYrinhgdOYghvaEAbEINmKxM= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-364-MdSbmsTyP_ipftwrgNCuOw-1; Fri, 20 Mar 2026 19:37:01 -0400 X-MC-Unique: MdSbmsTyP_ipftwrgNCuOw-1 X-Mimecast-MFC-AGG-ID: MdSbmsTyP_ipftwrgNCuOw_1774049818 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E7C04195608C; Fri, 20 Mar 2026 23:36:57 +0000 (UTC) Received: from GoldenWind.redhat.com (unknown [10.22.80.37]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 38C4B18001FE; Fri, 20 Mar 2026 23:36:55 +0000 (UTC) From: Lyude Paul To: linux-kernel@vger.kernel.org, Danilo Krummrich , rust-for-linux@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: nouveau@lists.freedesktop.org, "Gary Guo" , "Miguel Ojeda" , "Simona Vetter" , "Alice Ryhl" , "Shankari Anand" , "Maxime Ripard" , "David Airlie" , "Benno Lossin" , "Asahi Lina" , "Daniel Almeida" , "Lyude Paul" Subject: [PATCH v6 0/5] Introduce DeviceContext Date: Fri, 20 Mar 2026 19:34:25 -0400 Message-ID: <20260320233645.950190-1-lyude@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Previous version of this patch series: https://patchwork.freedesktop.org/series/160217/#rev5 One of the unsolved issues we still have with the rust DRM bindings is the ability to limit certain Device operations to contexts where we can guarantee that a Device has been fully initialized and registered with userspace, or vice-versa (e.g. must be unregistered). While the previous solution for this that I had was simply not exposing drm::Device at all until the device has been registered with userspace, unfortunately this isn't enough since: * As we found out with Tyr, drivers occasionally need to be able to create GEM objects before device registration * We would still need to be able to handle KMS callbacks which could be invoked after KMS init but before userspace registration (not handled in this series specifically, but DeviceContext will be required for handling this). This patch series provides a pretty nice solution to this, by implementing a very similar solution to kernel::device::DeviceContext: introducing our own DeviceContext type state. Series-wide changes V2: * s/DeviceCtx/DeviceContext/ for consistency * Move private driver-data availability to the Registration DeviceContext * s/AnyCtx/Init/ V4: * Split out DriverAllocImpl into it's own patch More changes described in each patch description. Lyude Paul (5): rust/drm: Fix potential drop of uninitialized driver data rust/drm: Introduce DeviceContext rust/drm: Don't setup private driver data until registration rust/drm/gem: Add DriverAllocImpl type alias rust/drm/gem: Use DeviceContext with GEM objects drivers/gpu/drm/nova/driver.rs | 10 +- drivers/gpu/drm/nova/gem.rs | 11 +- drivers/gpu/drm/tyr/driver.rs | 12 +- drivers/gpu/drm/tyr/gem.rs | 10 +- rust/kernel/drm/device.rs | 252 +++++++++++++++++++++++++-------- rust/kernel/drm/driver.rs | 52 +++++-- rust/kernel/drm/gem/mod.rs | 64 ++++++--- rust/kernel/drm/mod.rs | 4 + 8 files changed, 312 insertions(+), 103 deletions(-) base-commit: d19ab42867ae7c68be84ed957d95712b7934773f -- 2.53.0