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 50945C531D1 for ; Wed, 18 Feb 2026 21:21:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BB18810E6B3; Wed, 18 Feb 2026 21:21:49 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.b="ghlkt1jp"; dkim-atps=neutral Received: from SN4PR0501CU005.outbound.protection.outlook.com (mail-southcentralusazon11011057.outbound.protection.outlook.com [40.93.194.57]) by gabe.freedesktop.org (Postfix) with ESMTPS id D13FA10E699; Wed, 18 Feb 2026 21:21:47 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=vMM4bGAFQTsZA8YVrEovUUcufPXYyai2nUmiwHo9421Ch14a0cnhuAqnWc/7p9qu3LeT800bpLWh+nZobfAKlH4pbzqgBKoaLeSc5LY/XpFFMX4a8VY4Ks+7Lv9ihoJvgsC6cS4vY4UNK6FWwuolCh1GydJFE2zNL4DJg6UriZbgx1A8VauAyfWu6QgBBT1dUm8JUjC5FG78hnyqIguYNpe+QYX90B6VSRxuP6PJLSMu07xfU5c6m5M2ubFC3ZeWnOImNWdAmSjfpb4TdnMkbuEZJBKWH/fU5nyknokU6rfFtKXcR/EpxJyVMZoco023mKO8ZE1JAm6hIx5qcpayiw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=oEFoi0XF3NRMKs/0e55+d2lFKLXGaXv3MzDlki0jRHs=; b=THE3HelhnY5mE+tfTLKqYJ13AXfrMtUYUmlURwZzoBPS0x+vj5tHdwyl/jHWIe0QPiKenDvebR3wtQ12o627YVI6PneRu7DAusfVTtJTwvCf2Uke6qDEOedItcSCIP/AGTS6cUjXGGJSbz8kGFfzPH8C4i8TAFfe1VjB9jtMpGn24j0VZ8HCVFY/MM5a+DlnZoPuQeITmWRu4sUJFZbaoR4WZp1VwIwhQJ4f909QTzKBS0+/ROEZfVnpz8WGQ55PpoP7F3ooNk6UqPOwH7f177ObfAcacl59+lOlRbp5xFv3Xo5eOx8FJ6E9hcKpd/OjJ2FweJArPYGJDNnGwKl2AA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=oEFoi0XF3NRMKs/0e55+d2lFKLXGaXv3MzDlki0jRHs=; b=ghlkt1jp0jbYexMnu9gliu9C4+oQUpQA/A4/soLvpUNGffJY2lDDlASFr3jAutw8m9QVvVMRPhyK4Cq2tMrY/s2dxcXic5o5elAM5vW7I4I4K+B1sdSaxg958DYx0pDgndaBzHroD/4nkMuNsaUtJQD7hVzGsF4csh3o82/VCvCMIIf8psvH5mZCJN6gzyZ/QWwSVKaqs3WqX7yLUSUi50Mz15UkgZ7Rno0EofiyCWcvdA1rZao957h3/MLIrgAVaFkYgs2tNn1gmfxHqAeKesTkYrmbFadjYHDMRF5GzGmm8unO/PEWLVzJICLehf/0dssG6YY3xWSruyJlKaoaZQ== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from DS0PR12MB6486.namprd12.prod.outlook.com (2603:10b6:8:c5::21) by PH7PR12MB6636.namprd12.prod.outlook.com (2603:10b6:510:212::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9632.15; Wed, 18 Feb 2026 21:21:42 +0000 Received: from DS0PR12MB6486.namprd12.prod.outlook.com ([fe80::88a9:f314:c95f:8b33]) by DS0PR12MB6486.namprd12.prod.outlook.com ([fe80::88a9:f314:c95f:8b33%4]) with mapi id 15.20.9632.010; Wed, 18 Feb 2026 21:21:41 +0000 From: Joel Fernandes To: linux-kernel@vger.kernel.org Cc: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jonathan Corbet , Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Huang Rui , Matthew Auld , Matthew Brost , Lucas De Marchi , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Helge Deller , Danilo Krummrich , Alice Ryhl , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Trevor Gross , John Hubbard , Alistair Popple , Timur Tabi , Edwin Peer , Alexandre Courbot , Andrea Righi , Andy Ritger , Zhi Wang , Balbir Singh , Philipp Stanner , Elle Rhumsaa , Daniel Almeida , Eliot Courtney , joel@joelfernandes.org, nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org, rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-fbdev@vger.kernel.org, Joel Fernandes , Nikola Djukic Subject: [PATCH v7 23/23] nova-core: mm: Add BarUser to struct Gpu and create at boot Date: Wed, 18 Feb 2026 16:20:20 -0500 Message-Id: <20260218212020.800836-24-joelagnelf@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260218212020.800836-1-joelagnelf@nvidia.com> References: <20260218212020.800836-1-joelagnelf@nvidia.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BL0PR1501CA0034.namprd15.prod.outlook.com (2603:10b6:207:17::47) To DS0PR12MB6486.namprd12.prod.outlook.com (2603:10b6:8:c5::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR12MB6486:EE_|PH7PR12MB6636:EE_ X-MS-Office365-Filtering-Correlation-Id: 5c319d2f-5666-4997-4e32-08de6f33b5a3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|7416014|376014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?CDMJHqlqBAx5rnAfBaQmElB8YOVDKl21ndD8M2QxzbcZ0LWrbXQ9NG9tuWSf?= =?us-ascii?Q?Cx5ANKGpO8FU3PLLW4P38omQDBtjYpkTNmxEwKfuohF4Fz155ZvL5ItAuEO2?= =?us-ascii?Q?VZALkk2Ov4HOL1s/vrT4iQVO57+edDBpbCAer0MT+fg8zjetLmDgnqi3O6x6?= =?us-ascii?Q?GfUHI3E94oorsJNJXmW4VxYf9o4wVufd6TD1LZZufeMiFCLILPCrynvbg7IU?= =?us-ascii?Q?GgSbs8scMsNbP5qVyW2DUfFq0Z11iIRlXougYs+zU/vlxMDmOIV7VuhGNYjQ?= =?us-ascii?Q?7IKACANL2GYerXrfSy2hKn1/roYCIKS49zfi8kZl0yziejsuZjNPGmWPEOg2?= =?us-ascii?Q?4V5EfyE3zoN2B7YyOxbJKUPhX8S8JdN7cXXtnkJBioZiB0aOSRM9YRMYhbI3?= =?us-ascii?Q?IaAGivx505JUr82wbzO6XwdoeEvAn4EEKxNJaphkZHMdW0lFEImQq9Vv02n9?= =?us-ascii?Q?iCSmNJOPf7gUBHe7ZdpGCH+iPNvSel/gBZ9+heJd1yQt7fVCywdmnajZZQS6?= =?us-ascii?Q?qkkkAqYWme4EnFvrSkwkhxDhFAo61EeXhKp0QmGC0ZZSsMrCMR764vrzdy3n?= =?us-ascii?Q?qmIrga8zp6aOHiZBEXrokXXTvPe5CeNPgYivl4yzL0Uhg5mpuZMxeWC34HPk?= =?us-ascii?Q?IQ05GlmJ2KVzds8emxzuJQtjfony51XJaNvIs78Nf/Ze718oWTZUrHE99RZk?= =?us-ascii?Q?coh2xWaSuxTcxoXS237/OMlSWvJgZn0Q5TB3MzQ/oJd+nvFr/aAcHlQ5Rvp2?= =?us-ascii?Q?uHQ7MzdUEpG/mpf9UQA2JXQml2MzDNPQvDtHztUzSLLh+TmUeODFxtiLfNFl?= =?us-ascii?Q?XYSdc90kzvlI9523/iES56TPJScEb+LQdJ6iAjTHwmgGqnjhW4iGErvLy/+n?= =?us-ascii?Q?vJyUSIvJX8HB26rrJDK+Dnizjo7pmw5DIwzoTktUF206bOkJVNBD34mpl1+7?= =?us-ascii?Q?+77rXq0OxWXfSZbFO/gOYr5cI7x8k36E9hyu02gqzN1Fh2+0a7LsxUn+K2XH?= =?us-ascii?Q?HCzcOzZR+1VYNA3mIbRWe55hzfk1FmjfaYZx1EnaYPqzQbCpmBp2G2tY8M+7?= =?us-ascii?Q?Vobr0x6Al5eyWfV77i/Afz+ZksJfYABwb6rTWtk5gEFUOKd5nhycgBKjxPSR?= =?us-ascii?Q?eAc9HJAKmx6l4efl9jmuKHxMkOtcDgYzokvIopaNCqS4X4/mMc9821hSWG4x?= =?us-ascii?Q?IDcIXbddXSRbigaCV7vXqRS6MyMIKTGSLcyEccy6rhA5KMPP2JpztcvuI+Ip?= =?us-ascii?Q?6LwEuAC5zD8q5K+lNFHlOHXKRSg1KO2V9kzaj4NNlkeGES4ei7Q+M3EHFBUK?= =?us-ascii?Q?qlkVZbgR3uDcxalDSrUJuvYWbCWNCZOaW11/1v2kkXg75G43n1soEXraPNEF?= =?us-ascii?Q?Pgr0YVH839fb0qsggh8V9Ks+B8L2AMYeJdCtD7yRil6DF6+W/6MxAGcOCOhv?= =?us-ascii?Q?7SL8kWWWgWyZ+3PPPbfGzZ0k+SPSyBk93eUUqSoDJeou2+Ywrmdydaggm5BI?= =?us-ascii?Q?+W0wLaCbl9CFNlzoXzOFITfxHJUubP5rfeRWA3kBJ01s3aurSVuRNWZQbXLx?= =?us-ascii?Q?B/+gZ38pYkE55MgBMMw=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:DS0PR12MB6486.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230040)(1800799024)(366016)(7416014)(376014); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?MD7/HA18MlDKQ7OF31CvU1E17IcM2cU16ejQyBdX2iH81cVYj5plW+vljj+e?= =?us-ascii?Q?X8GSC0RMszgzOdVGhi+5dN4rHOcA9WTeLVZHN0yyBV352wEi5w5E0vK59Wl/?= =?us-ascii?Q?fmvgbpiwywdXl798A9M7kh7bZ6hIPBxhvf9DAzfu4VQS2Onp9YXK2ubvqq31?= =?us-ascii?Q?QX8Kq0HqwBmMFG3rhBCG+A9lBZFsC67krYTwsRlr6Bg3Jl3lY1IfUwDCvAJ+?= =?us-ascii?Q?i6Ua6ImX45wp2rp7jXWhUbbrwUBpDa7Dj1brh7X1+jO0kFizNSpNtteDf1ta?= =?us-ascii?Q?RBWMGH6ZswOXxCwlamzNNUPmdS0c3DBJkyBwzD3RZe+5yrr5mc5BkFjTWAcs?= =?us-ascii?Q?tZahJKbjsGpJnM80Dp79wZ9OCd2/0uh5p59shDk/HZ9scdIwJ495KBDoiWcC?= =?us-ascii?Q?KqjEDV07arhnUWcaCeCNaOFw9HucYnqIpYITg8IwIisNEyfSn3Ze5yzUwjDQ?= =?us-ascii?Q?JoFW40Jx6d6hXqrB0LwgA/6pSzCxTrn3xY6nevlKFj9A0+UDOs55dE73/Suz?= =?us-ascii?Q?rV5uIX5GdfUxoaHM73pVZ39SF15DZmhidEKW0rlSzioYs+BUm6B+3Xsv89tN?= =?us-ascii?Q?vMasHhRvtmHFLmIqLI7vy6JoGZ+VBfa3R9yN4Ae+N7+6F0Z6iNIyx96e/sMb?= =?us-ascii?Q?9wYfq6yvdJgzx9ZnddZvQcjJ/AixcObE3OBYi5sTbwlYxhm6tJkZF9dVKNNO?= =?us-ascii?Q?oHSsWdrUAO8m9BgjXYDF+7ZZKw73SPoshSXmNuiWCqnBw4z+UrtdLPQtBZqr?= =?us-ascii?Q?MLt7MVWvNUnhKqTsNQMLgXwyTqGrgx3ISg0AqrFKy2n5zGb4Cwpp5hewmj0U?= =?us-ascii?Q?u8opg1Laab0iw4dsSxvbdfAe7b53dh7/hsFKHgIF/yISmC5RFGKBiaHPYI1b?= =?us-ascii?Q?Yr04uxNaAhS+COuFBW2QKUsdx1MsEpf4elDo2dTjs6tNxMM38Qh8kiFSkmmN?= =?us-ascii?Q?MrvYct6acEO42rrLEzV9UOQdCxH1GvlxrSFJppDfCdRhqeq25I/qMN+mfmKD?= =?us-ascii?Q?Ky4ZhVjmL7+akYQtPwGYUjwIqxdLkPkVTB48xq5grXr2QVUDTn3qCPVoJYmx?= =?us-ascii?Q?X/QYt/TYiQgHsxuNGQQZfVu668ct92utENOK/EAwVjhC/lllywJfZ67o6cRw?= =?us-ascii?Q?9//kbXBYv4V9U0sLL6fp1y0Td08PK/MnLZOz+gk46yfTq7XITWOau9EWPNCS?= =?us-ascii?Q?945a5oXcZSOoYCBNItsvsR2orPXTJ+HLZuXe9NUHy9w4LTXtv+QxRbY2CkF/?= =?us-ascii?Q?Bxh5w2+bvx+XnR2Az5DYrez0VKNcA4TgKZS3QlxrctL6K7PlWlG7WPxSjtx+?= =?us-ascii?Q?Vig9UD4JiTSGp/qzAoq9GrzfkuvvOnjBRKCOdMBVa1dK/BMtS+AaKzP2HmEu?= =?us-ascii?Q?lldbC7QmYkTN42pCxL/Sqg3YSjrxGJtXQPu8v4nioK01ZJ3rIRlCxc3NTI3U?= =?us-ascii?Q?V5+Oeeb5htjxeenKdq3VJRASnjczNqEwEtbvBC08nCCHstLm39yWR5Qw5JnD?= =?us-ascii?Q?MxZbV5LxUGce5b4zNroRKhvkLShdn7uUSo6uroKqVjMSLUhGSdz5Mo5/LXQz?= =?us-ascii?Q?9zQozmprF9NCoxWZKPwookuXQkZu5Wd2EAFuSPhLdqxqFdg2+z49WL5HlJH3?= =?us-ascii?Q?J634/OvfCUDQM8rGrP+yTQKn2Vfs64kwBhr9cBhVLpT0Irqrl5gU8ALsT2qk?= =?us-ascii?Q?eojgIbzl057vn8APPuxMpIgO5nuBBI2bRqGWaplVGS1wDO5uohXIUl44fDV5?= =?us-ascii?Q?TYDseo/Ffg=3D=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5c319d2f-5666-4997-4e32-08de6f33b5a3 X-MS-Exchange-CrossTenant-AuthSource: DS0PR12MB6486.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Feb 2026 21:21:41.6863 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: GBnH3t+aq3yiWwcPoUzeSVaPIk3L7yExpChp6cJ6jXpaGPmYtzTcl+5E8BYczob0yDCN5yZZGvWoWMhpODYSnw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6636 X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Add a BarUser field to struct Gpu and eagerly create it during GPU initialization. The BarUser provides the BAR1 user interface for CPU access to GPU virtual memory through the GPU's MMU. The BarUser is initialized using BAR1 PDE base address from GSP static info, MMU version and BAR1 size obtained from platform device. Cc: Nikola Djukic Signed-off-by: Joel Fernandes --- drivers/gpu/nova-core/gpu.rs | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/nova-core/gpu.rs b/drivers/gpu/nova-core/gpu.rs index 670a2a89c6ec..159ccea8464a 100644 --- a/drivers/gpu/nova-core/gpu.rs +++ b/drivers/gpu/nova-core/gpu.rs @@ -26,7 +26,12 @@ commands::GetGspStaticInfoReply, Gsp, // }, - mm::GpuMm, + mm::{ + bar_user::BarUser, + pagetable::MmuVersion, + GpuMm, + VramAddress, // + }, regs, }; @@ -35,6 +40,7 @@ struct BootParams { usable_vram_start: u64, usable_vram_size: u64, + bar1_pde_base: u64, } macro_rules! define_chipset { @@ -272,6 +278,8 @@ pub(crate) struct Gpu { gsp: Gsp, /// Static GPU information from GSP. gsp_static_info: GetGspStaticInfoReply, + /// BAR1 user interface for CPU access to GPU virtual memory. + bar_user: BarUser, } impl Gpu { @@ -285,6 +293,7 @@ pub(crate) fn new<'a>( let boot_params: Cell = Cell::new(BootParams { usable_vram_start: 0, usable_vram_size: 0, + bar1_pde_base: 0, }); try_pin_init!(Self { @@ -329,6 +338,7 @@ pub(crate) fn new<'a>( boot_params.set(BootParams { usable_vram_start: usable_vram.start, usable_vram_size: usable_vram.end - usable_vram.start, + bar1_pde_base: info.bar1_pde_base(), }); info @@ -345,6 +355,16 @@ pub(crate) fn new<'a>( })? }, + // Create BAR1 user interface for CPU access to GPU virtual memory. + // Uses the BAR1 PDE base from GSP and full BAR1 size for VA space. + bar_user: { + let params = boot_params.get(); + let pdb_addr = VramAddress::new(params.bar1_pde_base); + let mmu_version = MmuVersion::from(spec.chipset.arch()); + let bar1_size = pdev.resource_len(1)?; + BarUser::new(pdb_addr, mmu_version, bar1_size)? + }, + bar: devres_bar, }) } -- 2.34.1