From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (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 3AF3B83A14 for ; Thu, 12 Feb 2026 01:37:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770860273; cv=pass; b=Ek14Peq5lGQXPuv9Lf19bq82qzJ2IxjEM8wUX/Azco7hDSvWIZYVw/yD0OM8qozqoj5+gwj6l8nzAep/p4yKy2BR+8EjJqJb/oOu/1+h+fcD0EOpB3zv3yo2IEwYLO4RiOL1wxr5vQ9+wKixFW4x8DqOEBfgmbwv+di+tSCB6Lk= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770860273; c=relaxed/simple; bh=B+4t3MA4uFO8i7m+loCKhgtsECjik9Xj6DirPf0f7sQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RKU6UdKLESm8rXNRwh53eJ7zYP6GZnY1YApycDsqx0W1p1POUYoPgCweDA4Ne5RO+MDGTNhRa7xRTySYJBL+Mr58WrK4VvTQQO59GO+az48MY7JRABvTDyyWOOhIZynVnPAnf1Zz4exXcBTaur2O43kHTBfvdS5sJrc76fqFLps= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=deborah.brouwer@collabora.com header.b=AQDZ0NFp; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=deborah.brouwer@collabora.com header.b="AQDZ0NFp" ARC-Seal: i=1; a=rsa-sha256; t=1770860263; cv=none; d=zohomail.com; s=zohoarc; b=WENxZRI5ARoyOHmuXvQU51JK0V12y1bBm+Rfej7Rtb++SW6XXHcmBdsBQjuKMOas/ogpQaauDftF2N14W5v8Jlbq4YHw6eW1Jvh2oyeP5yj+h7ngmJ3Dw+PmFLnBh1T9hKLVoOmwzWp9u0jBo/Ebq7cN5AzhAXT8tgWpR3I8pQY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1770860263; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=arvc3A7kVKOZImIISEA7QoPqP9daySKhh4Mbr1901II=; b=Jr04evUz7aeXZaQP4XO4zmEtRG43SUbDz/T48xVuLHvBDvBe0dmri7cw2L+cM4eIh+REhWCh3Y9F9PA0GYTHtNtnQoGJx2o20CWWgh3tARckwIxPxLux410XYepfM6hCsSrT3HK7r/FqNsgCo69Kj5ROiQjFhboGMweInVHvDOs= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=deborah.brouwer@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1770860263; s=zohomail; d=collabora.com; i=deborah.brouwer@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=arvc3A7kVKOZImIISEA7QoPqP9daySKhh4Mbr1901II=; b=AQDZ0NFpkkbnmbDpsM+P2kfrCD3+XD8+HGXrmYaEk/GnTXtB8D+wIhBs29c61wix 36rPIYs/8niCAzZj5W16Z1Jttxi05mhEC97Yx1e9ayxE2PoVayylnROozVm9vMIhbhs HVl+Pgu1xiu7xetzajseADSdD2qfvAxMx62l2gQ0= Received: by mx.zohomail.com with SMTPS id 1770860261379801.9602771459028; Wed, 11 Feb 2026 17:37:41 -0800 (PST) From: Deborah Brouwer To: dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org Cc: daniel.almeida@collabora.com, aliceryhl@google.com, boris.brezillon@collabora.com, beata.michalska@arm.com, lyude@redhat.com, Deborah Brouwer Subject: [PATCH 06/12] drm/tyr: add shmem backing for GEM objects Date: Wed, 11 Feb 2026 17:37:07 -0800 Message-ID: <20260212013713.304343-7-deborah.brouwer@collabora.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260212013713.304343-1-deborah.brouwer@collabora.com> References: <20260212013713.304343-1-deborah.brouwer@collabora.com> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add support for GEM buffer objects backed by shared memory. This introduces the BoCreateArgs structure for passing creation parameters including flags, and adds a flags field to BoData. A new_dummy_object() helper is provided to create a dummy GEM object for use as a GPUVM root. The Bo type alias is added to simplify working with Tyr's shmem-backed GEM objects throughout the driver. Co-developed-by: Boris Brezillon Signed-off-by: Boris Brezillon Signed-off-by: Deborah Brouwer --- drivers/gpu/drm/tyr/gem.rs | 52 ++++++++++++++++++++++++++++++++------ 1 file changed, 44 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/tyr/gem.rs b/drivers/gpu/drm/tyr/gem.rs index c1208d332dea..6a58f2da88d3 100644 --- a/drivers/gpu/drm/tyr/gem.rs +++ b/drivers/gpu/drm/tyr/gem.rs @@ -1,28 +1,64 @@ // SPDX-License-Identifier: GPL-2.0 or MIT +//! GEM buffer object management for the Tyr driver. +//! +//! This module provides buffer object (BO) management functionality using +//! DRM's GEM subsystem with shmem backing. use kernel::{ drm::{ gem, + gem::shmem, DeviceContext, // }, - prelude::*, // + prelude::*, + sync::aref::ARef, // }; -use crate::driver::TyrDrmDriver; +use crate::driver::{ + TyrDrmDevice, + TyrDrmDriver, // +}; -/// GEM Object inner driver data +/// Tyr's DriverObject type for GEM objects. #[pin_data] -pub(crate) struct BoData {} +pub(crate) struct BoData { + flags: u32, +} + +/// Provides a way to pass arguments when creating BoData +/// as required by the gem::DriverObject trait. +pub(crate) struct BoCreateArgs { + flags: u32, +} impl gem::DriverObject for BoData { type Driver = TyrDrmDriver; - type Args = (); + type Args = BoCreateArgs; fn new( - _dev: &kernel::drm::Device, + _dev: &TyrDrmDevice, _size: usize, - _args: (), + args: BoCreateArgs, ) -> impl PinInit { - try_pin_init!(BoData {}) + try_pin_init!(Self { flags: args.flags }) } } + +/// Type alias for Tyr GEM buffer objects. +pub(crate) type Bo = gem::shmem::Object; + +/// Creates a dummy GEM object to serve as the root of a GPUVM. +#[expect(dead_code)] +pub(crate) fn new_dummy_object(ddev: &TyrDrmDevice) -> Result> { + let bo = gem::shmem::Object::::new( + ddev, + 4096, + shmem::ObjectConfig { + map_wc: true, + parent_resv_obj: None, + }, + BoCreateArgs { flags: 0 }, + )?; + + Ok(bo) +} -- 2.52.0