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 4F942202C48 for ; Fri, 23 Jan 2026 23:12:43 +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=1769209964; cv=none; b=rG/qJXaIUfEgHdzBm8e+SzIN0c6CigZ0C591xKCTetjsmevGsiGyrJQr8dM0Wz0Tr3Zb/TUVMYumDD5lBnyUC6mtH3HFMWeNzc54m4JZrXiDcxd4lAg6ovsdHtHuxZJWn1yOcZtSjK80hHvRXH8lf1f+YHpKe9cvImoFFcMhePY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769209964; c=relaxed/simple; bh=64mXrIypsqELuidG6/QdOaI4qfl7c/REsvPJT3dyB8k=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=DOoJK2NebhTOx7+gCUgdm8h6RMXjmzfaUUzxmzs1bNUC5Do6pibFr4hMOIQLZkOn8d2/00uRzes0zdMW9joijEtjOcPUWpoEC7R7Lwlr4DOwIDbHvY0wPuqf/45VvYXW8AK6DIYNX3nx8oJN/gUEApql/gQDAOz8pYWUco71XtY= 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=XWSMMurI; 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="XWSMMurI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1769209962; 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=q3EQGPwM17ahHgggCnLwM/epN4ehtW+OIYvbEeIxdv8=; b=XWSMMurIXo8PxJRyOoYCru7tIuY5eEt63Z4hDXtEYFfa/5GZqm/LmLWpuEQRSTiIVDFr3Z bvP/+5Icm5mmgP0ZeLgfXyuvop/hIduFr7kDeEPb8y0m8kAi2FIqjL7QVZP8ROn9akaB7e KxH4nJuzsZAuRDucxhyM9kJrPdzn9Js= 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-194-tpzwDz1ZM7OmPHgWxAyfjQ-1; Fri, 23 Jan 2026 18:12:38 -0500 X-MC-Unique: tpzwDz1ZM7OmPHgWxAyfjQ-1 X-Mimecast-MFC-AGG-ID: tpzwDz1ZM7OmPHgWxAyfjQ_1769209956 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (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 6FEEE1956054; Fri, 23 Jan 2026 23:12:36 +0000 (UTC) Received: from GoldenWind.redhat.com (unknown [10.22.89.232]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E0F581958DC4; Fri, 23 Jan 2026 23:12:33 +0000 (UTC) From: Lyude Paul To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org, Danilo Krummrich Cc: nouveau@lists.freedesktop.org, "Miguel Ojeda" , "Simona Vetter" , "Alice Ryhl" , "Shankari Anand" , "David Airlie" , "Benno Lossin" , "Asahi Lina" , "Daniel Almeida" , "Lyude Paul" Subject: [PATCH v4 0/3] Introduce DeviceContext Date: Fri, 23 Jan 2026 18:10:12 -0500 Message-ID: <20260123231230.248500-1-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 3.0 on 10.30.177.12 Previous version of this patch series: https://patchwork.freedesktop.org/series/160217/#rev2 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. This patch series depends on the two pre-requisite patch series: * https://patchwork.freedesktop.org/series/160523/ Series-wide changes V2: * s/DeviceCtx/DeviceContext/ for consistency * Move private driver-data availability to the Registration DeviceContext * s/AnyCtx/Init/ More changes described in each patch description. Lyude Paul (3): rust/drm: Introduce DeviceContext rust/drm: Don't setup private driver data until registration 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 | 3 +- rust/kernel/drm/device.rs | 250 +++++++++++++++++++++++++-------- rust/kernel/drm/driver.rs | 52 +++++-- rust/kernel/drm/gem/mod.rs | 64 ++++++--- rust/kernel/drm/mod.rs | 4 + 8 files changed, 305 insertions(+), 101 deletions(-) base-commit: 5ec66bbc74883b73d169ceb25dcb7a5cb22e275b prerequisite-patch-id: ddb20be75c8fc92ba2d48a5c4aa8e724202de1ff prerequisite-patch-id: 87e69cd89a806392d3275b19fbfb160d44d957c9 -- 2.52.0