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 X-Spam-Level: X-Spam-Status: No, score=-4.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 362AFC433E0 for ; Tue, 21 Jul 2020 16:25:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 108CA20771 for ; Tue, 21 Jul 2020 16:25:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=Mellanox.com header.i=@Mellanox.com header.b="FdaHrvVg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728379AbgGUQZJ (ORCPT ); Tue, 21 Jul 2020 12:25:09 -0400 Received: from mail-eopbgr60066.outbound.protection.outlook.com ([40.107.6.66]:14978 "EHLO EUR04-DB3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726919AbgGUQZJ (ORCPT ); Tue, 21 Jul 2020 12:25:09 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=LFH0aWIQiXCqS8QMn4vZqrtavYjzm2UzMcgeZhpp6/QVzSHh+mQn+yu/YSl8VX+NstRP+Ojn+TMxq+kUC6t548mB8BjyYIr2OBUtWFYhRRMIphEGZNAYsLxW5H9KtcoddRwiUYwRNPWtzuzzw1W3rOOoC9JV72BCZFtoZuE8kvx86rTW7Z3XClXMcO06XwQQt2k5PtT/AvcHreXZLIIuXw5gS92KekLueA/5aLVlT3S/UF2vY01/58gamoY6VirxU2ePcheSzqDI5rp+fIsjV5qLf4muTfZ39uWtv60zm9BHpzvVzgvz8AN0Wj6u7v1b3zV89485N1x7C7rRaK0/PA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=BxIUqmVcJjeucPujZ3oAX3sWhQPvniTvHgdFbarLwdY=; b=TEyiwujcblNEemy5oegVVtOe7W7UZYu4owL+NVuhgYMW3zjgMsX9RJYjTwBmucjTFldjS4jze6tRUc9I6yCmoEcF/wZlkK3fp4eUP94m4y52Xm+i4mLp28xOK6SuNb4R4GYiQK8tkduqLloZ3eugk3OGvGLqIVdiVSi1rVUo72HavabUyZ+d1fNk6ufCla0pPavc+nNYGg7VlP7HPTajEMPVbhQuh/Q88dL60HWgs1MgL/pSB4TnV/drSOEUeEZqwce2qdL/CnVsf8rCxvhTGr+rjsJOfCuUkiGWi+GVtzYFe7wpwdnh22AyThN7Ky4E5zxC1/e8HZ+iMQr7L/Odyg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=mellanox.com; dmarc=pass action=none header.from=mellanox.com; dkim=pass header.d=mellanox.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Mellanox.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=BxIUqmVcJjeucPujZ3oAX3sWhQPvniTvHgdFbarLwdY=; b=FdaHrvVgvZgWejETQzRG+5SsRx9886kN969sjeeagfrLLasLt5kq6x7cx4qItamiNBpy3FctAZsEc0HPI+pyomv4hXl+s3+UqDCP3zgrqIfBycSSCG0qBRgIsn4c8mfCQ7NCuJoOMMFp34erAX6sdp4Z0l033mxqIMNtXh5ehrY= Authentication-Results: intel.com; dkim=none (message not signed) header.d=none;intel.com; dmarc=none action=none header.from=mellanox.com; Received: from VI1PR05MB4141.eurprd05.prod.outlook.com (2603:10a6:803:44::15) by VI1PR0502MB3952.eurprd05.prod.outlook.com (2603:10a6:803:23::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3195.24; Tue, 21 Jul 2020 16:25:05 +0000 Received: from VI1PR05MB4141.eurprd05.prod.outlook.com ([fe80::252e:52c7:170b:35d]) by VI1PR05MB4141.eurprd05.prod.outlook.com ([fe80::252e:52c7:170b:35d%5]) with mapi id 15.20.3195.026; Tue, 21 Jul 2020 16:25:05 +0000 Date: Tue, 21 Jul 2020 13:25:01 -0300 From: Jason Gunthorpe To: Dave Jiang Cc: vkoul@kernel.org, megha.dey@intel.com, maz@kernel.org, bhelgaas@google.com, rafael@kernel.org, gregkh@linuxfoundation.org, tglx@linutronix.de, hpa@zytor.com, alex.williamson@redhat.com, jacob.jun.pan@intel.com, ashok.raj@intel.com, yi.l.liu@intel.com, baolu.lu@intel.com, kevin.tian@intel.com, sanjay.k.kumar@intel.com, tony.luck@intel.com, jing.lin@intel.com, dan.j.williams@intel.com, kwankhede@nvidia.com, eric.auger@redhat.com, parav@mellanox.com, dave.hansen@intel.com, netanelg@mellanox.com, shahafs@mellanox.com, yan.y.zhao@linux.intel.com, pbonzini@redhat.com, samuel.ortiz@intel.com, mona.hossain@intel.com, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org Subject: Re: [PATCH RFC v2 04/18] irq/dev-msi: Introduce APIs to allocate/free dev-msi interrupts Message-ID: <20200721162501.GC2021248@mellanox.com> References: <159534667974.28840.2045034360240786644.stgit@djiang5-desk3.ch.intel.com> <159534736176.28840.5547007059232964457.stgit@djiang5-desk3.ch.intel.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <159534736176.28840.5547007059232964457.stgit@djiang5-desk3.ch.intel.com> X-ClientProxiedBy: MN2PR13CA0029.namprd13.prod.outlook.com (2603:10b6:208:160::42) To VI1PR05MB4141.eurprd05.prod.outlook.com (2603:10a6:803:44::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mlx.ziepe.ca (156.34.48.30) by MN2PR13CA0029.namprd13.prod.outlook.com (2603:10b6:208:160::42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3216.15 via Frontend Transport; Tue, 21 Jul 2020 16:25:04 +0000 Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1jxv4f-00DGaQ-GT; Tue, 21 Jul 2020 13:25:01 -0300 X-Originating-IP: [156.34.48.30] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 15196007-01a4-4df4-f3d3-08d82d92a02c X-MS-TrafficTypeDiagnostic: VI1PR0502MB3952: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6430; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: tvd7/H5c/IytsPIVME8EwHSiMLoAbjf2suVvYSgsrIgnMidYYTJoqcBAB/4EgORSUjtscraVTWy2EDkVTukggcFehxc828p1JsbGAsid+hf6I0dVMEOxSyQmjbWY4/WouiOR3EYkBhIgOZIhLh7vjMRLz1UzgYMGgTUcYzgoxy8cr8tM/JY0cnxHK0KtlFLzSHaWp5bsCLQbH35i9PtUZaQ7ZczSXyCC9EpUtqhRUKmspK3kyNuSlFmIG9CmOvVa8DIAhPpPkQHZeBq8sASfmI0o6D2+WEM4Tan/pcF3R4reTsVAcyc7aaisxZAIXcOY4NcV2Z9RBSHK4iiAPlr4mg== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:VI1PR05MB4141.eurprd05.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:(4636009)(136003)(346002)(366004)(396003)(376002)(39830400003)(36756003)(86362001)(5660300002)(2906002)(316002)(478600001)(66556008)(66476007)(26005)(426003)(33656002)(6916009)(186003)(8676002)(4326008)(7406005)(83380400001)(7416002)(2616005)(4744005)(9746002)(9786002)(8936002)(66946007)(1076003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: enjRqkU2/KEOmfS0ROVqzO0KNOcuClQIMccQKnBdV4ptmnV6E7illlW2Pu43JGQezIiJ5do/MwxxIKA05D6tYov5qm1MskkjR09pFJi3U+iO2MGCKytzI5IQPDaa4vnTFACO8dWBO4vk+b3JmG86sUHG9UDGxqMqT7CG+YwXwv1cWVlGQzjCAai+0xkAjW0/dsLlW/TTQWD9K221H8qjrMDasY44VHiM9Ibva3y/Bog6BP1FSmSUDRBeJOZdZfn156aaLFY/KZ6foEUGdMmlb70gi3w/TBWCaogbiI+w0ydGZ+3Rfm5hYlGqE0gljaEED6D+o2ZsRW7j/RUgBjlmn+layVgIbHrYrv9KuM7XjcBgL6Cj/oU+EeBAW73snjol4fidbN8R14vbAgu0kQn70iNo+MM1dPyXZdL+7+NWvBcuTKEhPAw7qj8yinG7oikYOHaFP92T2p0iybw7Xls1U8xlVfHnnOMv/TxImazZy/g= X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: 15196007-01a4-4df4-f3d3-08d82d92a02c X-MS-Exchange-CrossTenant-AuthSource: VI1PR05MB4141.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jul 2020 16:25:05.0859 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: WwFLbMYHvWy1dfO8Lt39VNdX8PiVBAlxyfsca9pDMeY7oklJQU2zKDi124nWKHWpyw7YeUXwVur4r9BaLTkh6A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0502MB3952 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org On Tue, Jul 21, 2020 at 09:02:41AM -0700, Dave Jiang wrote: > From: Megha Dey > > The dev-msi interrupts are to be allocated/freed only for custom devices, > not standard PCI-MSIX devices. > > These interrupts are device-defined and they are distinct from the already > existing msi interrupts: > pci-msi: Standard PCI MSI/MSI-X setup format > platform-msi: Platform custom, but device-driver opaque MSI setup/control > arch-msi: fallback for devices not assigned to the generic PCI domain > dev-msi: device defined IRQ domain for ancillary devices. For e.g. DSA > portal devices use device specific IMS(Interrupt message store) interrupts. > > dev-msi interrupts are represented by their own device-type. That means > dev->msi_list is never contended for different interrupt types. It > will either be all PCI-MSI or all device-defined. Not sure I follow this, where is the enforcement that only dev-msi or normal MSI is being used at one time on a single struct device? Jason