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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 A87A4E77172 for ; Wed, 4 Dec 2024 23:29:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version:Cc:To: Content-Transfer-Encoding:Content-Type:Message-Id:Date:Subject:From:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=Au0gmyzBByXMX9kk9x9rwBQKfT1Y9pshosRUmRms4M0=; b=YSeSMW5Bz6vHTHJd37vQK9b7sV +m3KdQ6f4q9aLkrY+6VYI0o1hkYJuSIX5DurrQfFMwXijOzFNszTA/lZiNIuJdzRs1x4Ro70Rg0Dh DsqNyCb43oT5TZAirqRyuO/y3Onvkg33zGcAz99fXHKSZsCnDD9j0s6z5r+F2bGu7rEvQaS6gIF2k Cvzo4La4Z7/0rXTcAi3M1i6WqRGlBUTWu7BNIqRc/EpN2hMTiCQsP/wj00dbvTzXzXWZI7OM/xr98 fBtIf6wVSfvwv+os4/DcJfw4SoPMGz8G54I67gRbBhRnnBmOyuqpmjhXYBnCvUY5txEerfrkrgkNd vjtBGOMg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tIynq-0000000E9b8-18BX; Wed, 04 Dec 2024 23:29:06 +0000 Received: from mail-db8eur05on20631.outbound.protection.outlook.com ([2a01:111:f403:2614::631] helo=EUR05-DB8-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tIyl8-0000000E8r5-2hl6 for linux-arm-kernel@lists.infradead.org; Wed, 04 Dec 2024 23:26:20 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Ri/3bUT8PAjDEBOg16+ZSnbyo91nwBiA58G8LUlW66N/33v5JU7jPpoebDND+VH2KfBJahEF1WVYEer5WVOEohscdSb9nbpnKPw053Yjrtco62VE75ikkK+Wyyz+puydVKqxIGP951iXGW9YopHrV9ZEeQzXmUQYYTt0ZnPEtYZAizeD0eNODezdlxP7337LWpmNHp9szBEltg3S90WwVJeXDOFCQVxEFFQKdZ4cmD/Pijme9aNKnVruSZd9svwHFdIssq7aHeqf/jX5YkM24yJpDdYGo+6qyDqqUbnTf32SAFQ5XTjpcYhndTk4g0Tbjy1TsV7BuAg1nMwOFuD+Ng== 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=Au0gmyzBByXMX9kk9x9rwBQKfT1Y9pshosRUmRms4M0=; b=dDtgM0MGUz7VgRMOGC/xW0u6i4uMA3m5jzLU9nALRxoTMWRfT41fiv+N3VnopmiQx5amkSvXc50b+v9div6HDIf7F5kwBfthZn7RFjr2H5t35hmPIoaSFLXLCykQJ7oZq9TqRmd0RJAOUOffZGbwMAEvqhu7asltaB4hxLkz4EnM5XBMudD84ew350PrBgGGFZAPwCWDLXoaqmRVfPmxCUPubKJrdW6MDhc/ZHyNxvKYnEtErX1EHlD7I1iMFYj5VRbMd3MIGulV82Qv0+/kNLxAe/Cp+scXXYyk7TcpqZEAWJAL5rvBHqmncPXmBx45omi9TW1OlFncZx4WwOhAtA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Au0gmyzBByXMX9kk9x9rwBQKfT1Y9pshosRUmRms4M0=; b=YtKU66a5GS0a1qw7qb+5T9q8ljR/jz7h3sqRb65BxB/TEaG7FcRsJQ1Eiv9bf7VivJGMKonEfWcmNuyUphPk/Oah87UOCvnodADpF5+qxzqySGY0FtEc00KnPwE5WCGFifG941VcmCC3U6dNMEGbdUwbFa+UIOAumZ7u7eEhaWnkTgpbl5D5vrYYCsK/FdMPZRKHPBRA9fYdjhD0RKmJER/kHlNmuUwRGiZcG3buZQ2nUdxH6rRprlSpo9U90yHNtN2EVFI+CM5spTZJtm7iL0vWXQMc99J5N1s75nu3H4neUdN3jYCeID9YhBI+Y0Qft7wXT+21UjS+OKvDbrDGIQ== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from PAXPR04MB9642.eurprd04.prod.outlook.com (2603:10a6:102:240::14) by DU4PR04MB11006.eurprd04.prod.outlook.com (2603:10a6:10:58a::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8230.11; Wed, 4 Dec 2024 23:26:14 +0000 Received: from PAXPR04MB9642.eurprd04.prod.outlook.com ([fe80::9126:a61e:341d:4b06]) by PAXPR04MB9642.eurprd04.prod.outlook.com ([fe80::9126:a61e:341d:4b06%5]) with mapi id 15.20.8230.010; Wed, 4 Dec 2024 23:26:14 +0000 From: Frank Li Subject: [PATCH v10 0/7] PCI: EP: Add RC-to-EP doorbell with platform MSI controller Date: Wed, 04 Dec 2024 18:25:50 -0500 Message-Id: <20241204-ep-msi-v10-0-87c378dbcd6d@nxp.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-B4-Tracking: v=1; b=H4sIAP7kUGcC/13PS27DIBCA4atErEvF8Car3qPKAhhoWMS27MpKF fnuwZGC7S5nxPdreJApjSVN5Hx6kDHNZSp9VwdgHycSr777SbRgXRDOuAQGjKaB3qZCbZDRByE ChETq42FMudxfpe9Lna9l+u3Hv1d4Fuv2nVDvxCwoozFhtM6DjuC/uvvwGfsbWQOz3CEBDcmKD Bj0HJ0L3B6R2hAw25CqyIN0CiJDxswR6R0C3pCuSKrsDOdJRP7vPLNHsiFTEUofjfc5II9HZPd IN2Qr0hmytjkjhHBEbkOciYbc+ifNMESRQSFuaFmWJ7ORz5XZAQAA To: Manivannan Sadhasivam , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Kishon Vijay Abraham I , Bjorn Helgaas , Arnd Bergmann , Greg Kroah-Hartman , "Rafael J. Wysocki" , Thomas Gleixner , Anup Patel , Marc Zyngier Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, imx@lists.linux.dev, Niklas Cassel , dlemoal@kernel.org, jdmason@kudzu.us, linux-arm-kernel@lists.infradead.org, Frank Li X-Mailer: b4 0.13-dev-e586c X-Developer-Signature: v=1; a=ed25519-sha256; t=1733354769; l=8442; i=Frank.Li@nxp.com; s=20240130; h=from:subject:message-id; bh=ndCsNl7CzN6Fgn0Kp89Q1LtC1gKv1xdWwtoLPsqn874=; b=ILm4DKj5EZzMS+iAluuDbx4E4V+D6/l9gx92p+0d8AMpI66uZjgjwWMoIqN+6TI0mXU7m2A4c d3dl8btJIsnDsP2DMiqTK/mkp0Zi3UHq+b7Jt1ekpCvFj9d9H2uDrNZ X-Developer-Key: i=Frank.Li@nxp.com; a=ed25519; pk=I0L1sDUfPxpAkRvPKy7MdauTuSENRq+DnA+G4qcS94Q= X-ClientProxiedBy: SJ0PR05CA0031.namprd05.prod.outlook.com (2603:10b6:a03:33f::6) To PAXPR04MB9642.eurprd04.prod.outlook.com (2603:10a6:102:240::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB9642:EE_|DU4PR04MB11006:EE_ X-MS-Office365-Filtering-Correlation-Id: 5cf8f125-e4c2-4b1b-9c03-08dd14bb0b84 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|52116014|376014|7416014|1800799024|38350700014|921020; X-Microsoft-Antispam-Message-Info: =?utf-8?B?TmFmSmdMVFBoN2RsSmJYNENPZklET3dSbXRMdUxQdllhcDZubGVzbTdqam43?= =?utf-8?B?MU5DemVlRm1pR0tZdnVYdGdBSFpHaXhwa2lZMnJ2WE9YNllRY3lTem1KUTRU?= =?utf-8?B?Rm80RHhoN2pWSHVOQ05uSVFVelJlVlhBVERBckNyQ1FpMDcyZWNOQ2h4Z3JL?= =?utf-8?B?bTByYXU3ZkJSUDh0WjJDRC93WjVIMCtYMk02T0NMOFd3enFsSzRrVjZFcXdR?= =?utf-8?B?bm9XaTVvdldVYkd0QTNPc0tzNWpjRXpBSXhKVFc2R2xpYVdJRFgxTUVyZEwy?= =?utf-8?B?MWc5QTB5dXRSZFNZMDdMWGczTkplYWhpSldBYVR4U25RQVRzWnhESjYyeFlD?= =?utf-8?B?QnpMR3NxRUlvSFJPZ2tJZlFUM2tWTmNRUVhIOEZIVW9HcFpRNURUaU9pNmI2?= =?utf-8?B?YTVRaEtOOEExQzd1dnN0Yk9DU3dvKzgvMlllSnh2T2NBQmJOTWQyVkhGdEx2?= =?utf-8?B?M3VMOUJyYUw5akdWekFSOVJBMXVId2ppU2IzcUUrT0hyc24ydG9XZkxoNmdO?= =?utf-8?B?WUlNL1dHbnpranVXamFqem1HQjVwaFlGS0FQb0QvVk0yNm43ZFF5SXNaQzJM?= =?utf-8?B?N2NsZ1I1RUZheEJ2WFl2b2hKV0hiYjVPdkRnZUpDSkJOa3l3UitLZFhXd1Nu?= =?utf-8?B?eXhPNTI0bTRVNWQzTTdiSG5JVDRROVFMNHBoNE5acGZNejRhRGhabGNoN29D?= =?utf-8?B?Y3kxTHRSZGdLb1paR1pVcjk5amJNQWllc3ZKRkRhZjdzK2JGNVJ4blR0Mmdy?= =?utf-8?B?UWNhQk56bnlmbzlzMU5MOG9MOUxEdkFlR1g0N1B3M0czR0tnQ0pwNnZUbWFk?= =?utf-8?B?VHozYXBvb2JMTmVpLzBpaGtVYmlBVHRSTTl2NUdTNjJKS0RRcFk4dDErZE52?= =?utf-8?B?USszUTZ5dkwydUZSWktXU0s0SUVKZXBuQTNnajk0ejVaKzluY2QzWVhXaHpM?= =?utf-8?B?RmVqMEJkVUk3Q0gwb09SVFhXM25mam4rcjVzYm9NU29jL3dwMklrazFWQldp?= =?utf-8?B?cU9PanpMWFVNWDY4MTJmakloaWxlZ2FVTVZPUEtFMzRxK1BOZ0k2L3BXVk1L?= =?utf-8?B?QldBN2FmaGZBSGEyVEFoWmEvVm5XekYwUTl3QXc5WDdQdUkyREhEMCtNZGF6?= =?utf-8?B?c3daanc0dXBHWDI0ZHh0Tld2NXZFRE16d3BsSDZRU3RPbkJqSVhZUDhIRUp4?= =?utf-8?B?MmFkVFd1RU14OHd6dnlYQUdwODMzVmZINFd1Z1RYVk5QTjhtekcwMFhrMUJm?= =?utf-8?B?OXZyR2IzaEMyMURmR0l6MCtDVFF5ZnlKWHd4b01YeXNwbmlWYkJKU1djMHA2?= =?utf-8?B?WHpZYXk4dHovZFNYUFowU2lwODFmNXZYa3NCRDE0Q2RhYXkyT1B5UERER1Yr?= =?utf-8?B?cTNVR3Urc3JhcFJQaThaR1ZHcWxoa1dnYjNDenMxUDNzL2V5QU5pOXVIblVt?= =?utf-8?B?c2RabFl5VUZxakFaNUJ2K1dtc2RYUWxpN2xkSUZtdHplcHdDdnBkWWtxY05P?= =?utf-8?B?V2V6Vm1JOEQvcHQ1WUJKRmRKQngwSG5pTHgrVGM2aUZ3OU5QWWRwN1dzOURs?= =?utf-8?B?S0wzZm5QS1VoRThsYW5sUEJaMHozMWI3KzR1M0lITzd6ZTBMVCtVdW1mcTVI?= =?utf-8?B?NjhNRGNQdE00cWhNMWs1cHhTMkJ1S202RnQ5N0poSjBsc1NPSjMvTTR3dld5?= =?utf-8?B?clN6SHEvMFExRG4xRVM1QjdBVk9nMzZCQzIxR1E0MERhOEVPaDdwaFlqeVd1?= =?utf-8?B?MzAxdkliS055MDFGT3hqTi9uNUZWRzJhZmJSd01GTmxEMUxHbUlHUnMxWkQ5?= =?utf-8?B?ZDNXeGx1Q2d6T3RveUppMnVhV29RMXlmYk9uY0E4QnBaVDRLdVZEdWVMZWVE?= =?utf-8?B?S0tseHV1K25nOUc2QXcrcXBqSzFSUnc2VGNPLzgrMTgvc0RucFZIUnpkeFFX?= =?utf-8?Q?nnbGHibhkkM=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PAXPR04MB9642.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(52116014)(376014)(7416014)(1800799024)(38350700014)(921020);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?VlRxQVo3a3d3a2JtbTk4dDFJOEEwNytxY3I5ZmE4UmlUT0RCSFhHS2VQMHli?= =?utf-8?B?SEtDL2pxRVlMNVlyOTBORTBhcFRKbW4xSURSM21pZTErbFkvcUR1M0V0UWwx?= =?utf-8?B?NEhjUXlWTmZRTStiTndaR250bGFBVWZLcWNDQ3BFclR6UHNjNzdrR0EvNk1u?= =?utf-8?B?VktOUnJBamI3b1VIeW5qcS9DZFM1em1vSUI1bDlNY25aVWpuQzNoWE91ZzFR?= =?utf-8?B?WENaVS9ZeDRMTUpxVm5ic0k0VnhiTmlIb243Mm5GOEozTGNvbms0dEFxanBF?= =?utf-8?B?aVlIVEY5T3FzQVZwNjJXMFN5S3dNQTFXd3JaVUYyVVpBcFQ0WllldW5OSFZF?= =?utf-8?B?R2txWFFsVXJybFNJWi9vT25uMmhmWVNmNjhqMGFnT3dNU2JZbUNFUEVibmJK?= =?utf-8?B?amsySkRQY2pGaDFocjlCa0ptYU1VbExsU05pQlJvN0lzaTVIUmRkZGVIblNF?= =?utf-8?B?OEU0Q2w4MHlQL0lBUkFJczN2U0N2alBMTUxtb0tIZGxsUkNsM0d4bEU3N1hG?= =?utf-8?B?R3ErR2RVeW9USVYrY29FVG5scDhCeFJRVm5HTmoycXJ0TmZGWkJJTFl2dXlz?= =?utf-8?B?MVh4Z0FGYTdOMFZRT29nN1VDeVFFWkNwOEdBM0VrUmNtM1g0M2hsSHAxbkhj?= =?utf-8?B?WnpEL1d0eUlKVUpTWmRYV2hBREJqcGhQaEtYdWJjWU5FeGZCdXFXNnUxZEpy?= =?utf-8?B?UGgrNlliM1pjTkNZeTJ1VE1YcnBUK3pmY2s3UmJnWWZjdkNKK25XNncwYjdh?= =?utf-8?B?Rk5sejNWRTNLS29JYjZRcFJyMUJDbG1tUUVBNW9Lc0taQktuUVR0c0crUldB?= =?utf-8?B?VjQvRnJjcURVbE8yZjN0SEQzWER0NUNNMHpVRy9lREc5c2J4OHdVQTFxaFRQ?= =?utf-8?B?TW5rTEtTdmcwMGlUK1lyKy8vVC9zS1RER2d6ak1ndGt3Tklaa0ZVYmowenQr?= =?utf-8?B?d2JGVlZ1dUNJK0I3dzFmV1hpazlCQ01aYWxzSWhBc2RBNjdXZkQ2LzdMVzNS?= =?utf-8?B?V0xVMGhQY0l2S1kzbFpwOFJacXBEZ2h3Q0RIbnJuV1lDbWFQME82UDg3aFBO?= =?utf-8?B?NWFDWjlNRnF5bXM2L1pMZDAzN28xRFNLQlh6KzdCRFhCRjhuTjFNVUNNdVhh?= =?utf-8?B?OUxySTlhRENQWDN2dlVGT3FVb3NBS0d3bkwraDNxODVQcENxL25ZZGIyc1Bk?= =?utf-8?B?ZDhoeHltMFBpTjh1YURFYk5pUE9WY2ZHUnIxcGV2cHlJVEJBaE5FZ0Y3emo3?= =?utf-8?B?YThSNy9SMHdsdklhSUxwTDEyd0lxWTlmZHYvdjdKc0tjYkFZa1lhdnhtNmVD?= =?utf-8?B?NUVETWVjU1RwTyttS3BGYktEVEtkMkNQOG92aEhyc0srMGg3US9Ld2NJelly?= =?utf-8?B?SzJFOExMRGxnNDBwenRGSG8xa3I5SzlvU0tlK2NRMXowOFhxZkh0L2RoUlYy?= =?utf-8?B?aWRGbTFDOHZyRmdMVmQxRG14aE9CMzM0UHpjMjk0ZjBrWHFISkxHd21rZ3E1?= =?utf-8?B?QkFyVkFyT0hQYm1LZlYvVjZBMmlHM3Y0U1AwbmlMOVdjRE1rOWk0Qjdpb1FR?= =?utf-8?B?cjlTNTNLYU85dHF0RjNiOTlIUHFUNUJIdGUzb2Vjc1RKbGt3NHM0N1VHaytk?= =?utf-8?B?UzY1ZE9JdENxU1Nvd053U01wTmo0VVZHellsejVZZWIrdXRidXJXRjJuRzZS?= =?utf-8?B?Q3lKYllXWVhxU0Y0UmNSdkJlL3ViYmdPZXVLUnY5bjRZZWk0Lys5Mk5pc2Zx?= =?utf-8?B?amRXeHRhb084SU5HbXJCamtzZmtzRmd5MzBwNm8rN04vN0M0SHdSRlZQcnlD?= =?utf-8?B?UzViTllUTG1jRStiYWE2SjVIbVBFY0V0dW05WmlSWGtEOUs0V3gyeHg0TkJW?= =?utf-8?B?UW01NnhhSWRuQnZyOEVWSnVxUWtQMGxKNmNqcGhHU1lyalh2RTQ1VmJTdDVt?= =?utf-8?B?OVo3aWozNnpPTWR0SjBHMlVrZHRRRzg1ekZUVVBQWUYrMHRMOFVseHJnUnZ2?= =?utf-8?B?WDNPK3BjT0w0c0taZ24wRHplcFNzclVhVnkrYzE3cVNTYWN0czNrSWtPVWxS?= =?utf-8?B?d2NRK2RBQm1HNUJJc2FIcmdyaVd5S1ljTktrbmJXc1dOeDlHMWkzMGY3L1Zu?= =?utf-8?Q?GZnA=3D?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5cf8f125-e4c2-4b1b-9c03-08dd14bb0b84 X-MS-Exchange-CrossTenant-AuthSource: PAXPR04MB9642.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Dec 2024 23:26:14.2225 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: yvP0pJ5m6qqEJO0FpGucl2ZlNIfQQ9uesSmw8tTAaaqnTMjLAfRm7YZU7a+bjMZjL/5IRCczo51iX2ckDk5IuA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU4PR04MB11006 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241204_152618_834077_4E87C374 X-CRM114-Status: GOOD ( 10.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org ┌────────────┐ ┌───────────────────────────────────┐ ┌────────────────┐ │ │ │ │ │ │ │ │ │ PCI Endpoint │ │ PCI Host │ │ │ │ │ │ │ │ │◄──┤ 1.platform_msi_domain_alloc_irqs()│ │ │ │ │ │ │ │ │ │ MSI ├──►│ 2.write_msi_msg() ├──►├─BAR │ │ Controller │ │ update doorbell register address│ │ │ │ │ │ for BAR │ │ │ │ │ │ │ │ 3. Write BAR│ │ │◄──┼───────────────────────────────────┼───┤ │ │ │ │ │ │ │ │ ├──►│ 4.Irq Handle │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ └────────────┘ └───────────────────────────────────┘ └────────────────┘ This patches based on old https://lore.kernel.org/imx/20221124055036.1630573-1-Frank.Li@nxp.com/ Original patch only target to vntb driver. But actually it is common method. This patches add new API to pci-epf-core, so any EP driver can use it. Previous v2 discussion here. https://lore.kernel.org/imx/20230911220920.1817033-1-Frank.Li@nxp.com/ Changes in v10: Thomas Gleixner: There are big change in pci-ep-msi.c. I am sure if go on the corrent path. The key improvement is remove only 1 function devices's limitation. I use new patch for imutable check, which relative additional feature compared to base enablement patch. - Remove patch Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() - Add new patch irqchip/gic-v3-its: Avoid overwriting msi_prepare callback if provided by msi_domain_info - Remove only support 1 endpoint function limiation. - Create one MSI domain for each endpoint function devices. - Use "msi-map" in pci ep controler node, instead of of msi-parent. first argument is (func_no << 8 | vfunc_no) - Link to v9: https://lore.kernel.org/r/20241203-ep-msi-v9-0-a60dbc3f15dd@nxp.com Changes in v9 - Add patch platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() - Remove patch PCI: endpoint: Add pci_epc_get_fn() API for customizable filtering - Remove API pci_epf_align_inbound_addr_lo_hi - Move doorbell_alloc in to doorbell_enable function. - Link to v8: https://lore.kernel.org/r/20241116-ep-msi-v8-0-6f1f68ffd1bb@nxp.com Changes in v8: - update helper function name to pci_epf_align_inbound_addr() - Link to v7: https://lore.kernel.org/r/20241114-ep-msi-v7-0-d4ac7aafbd2c@nxp.com Changes in v7: - Add helper function pci_epf_align_addr(); - Link to v6: https://lore.kernel.org/r/20241112-ep-msi-v6-0-45f9722e3c2a@nxp.com Changes in v6: - change doorbell_addr to doorbell_offset - use round_down() - add Niklas's test by tag - rebase to pci/endpoint - Link to v5: https://lore.kernel.org/r/20241108-ep-msi-v5-0-a14951c0d007@nxp.com Changes in v5: - Move request_irq to epf test function driver for more flexiable user case - Add fixed size bar handler - Some minor improvememtn to see each patches's changelog. - Link to v4: https://lore.kernel.org/r/20241031-ep-msi-v4-0-717da2d99b28@nxp.com Changes in v4: - Remove patch genirq/msi: Add cleanup guard define for msi_lock_descs()/msi_unlock_descs() - Use new method to avoid compatible problem. Add new command DOORBELL_ENABLE and DOORBELL_DISABLE. pcitest -B send DOORBELL_ENABLE first, EP test function driver try to remap one of BAR_N (except test register bar) to ITS MSI MMIO space. Old driver don't support new command, so failure return, not side effect. After test, DOORBELL_DISABLE command send out to recover original map, so pcitest bar test can pass as normal. - Other detail change see each patches's change log - Link to v3: https://lore.kernel.org/r/20241015-ep-msi-v3-0-cedc89a16c1a@nxp.com Change from v2 to v3 - Fixed manivannan's comments - Move common part to pci-ep-msi.c and pci-ep-msi.h - rebase to 6.12-rc1 - use RevID to distingiush old version mkdir /sys/kernel/config/pci_ep/functions/pci_epf_test/func1 echo 16 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/msi_interrupts echo 0x080c > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/deviceid echo 0x1957 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/vendorid echo 1 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/revid ^^^^^^ to enable platform msi support. ln -s /sys/kernel/config/pci_ep/functions/pci_epf_test/func1 /sys/kernel/config/pci_ep/controllers/4c380000.pcie-ep - use new device ID, which identify support doorbell to avoid broken compatility. Enable doorbell support only for PCI_DEVICE_ID_IMX8_DB, while other devices keep the same behavior as before. EP side RC with old driver RC with new driver PCI_DEVICE_ID_IMX8_DB no probe doorbell enabled Other device ID doorbell disabled* doorbell disabled* * Behavior remains unchanged. Change from v1 to v2 - Add missed patch for endpont/pci-epf-test.c - Move alloc and free to epc driver from epf. - Provide general help function for EPC driver to alloc platform msi irq. - Fixed manivannan's comments. To: Manivannan Sadhasivam To: Krzysztof Wilczyński To: Kishon Vijay Abraham I To: Bjorn Helgaas To: Arnd Bergmann To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: imx@lists.linux.dev Cc: Niklas Cassel Cc: dlemoal@kernel.org Cc: jdmason@kudzu.us To: Rafael J. Wysocki To: Thomas Gleixner To: Anup Patel To: Kishon Vijay Abraham I To: Marc Zyngier To: Thomas Gleixner Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Frank Li --- Frank Li (7): irqchip/gic-v3-its: Avoid overwriting msi_prepare callback if provided by msi_domain_info PCI: endpoint: Add RC-to-EP doorbell support using platform MSI controller PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check PCI: endpoint: Add pci_epf_align_inbound_addr() helper for address alignment PCI: endpoint: pci-epf-test: Add doorbell test support misc: pci_endpoint_test: Add doorbell test case tools: PCI: Add 'B' option for test doorbell drivers/irqchip/irq-gic-v3-its-msi-parent.c | 3 +- drivers/misc/pci_endpoint_test.c | 80 +++++++++++++ drivers/pci/endpoint/Makefile | 2 +- drivers/pci/endpoint/functions/pci-epf-test.c | 132 ++++++++++++++++++++++ drivers/pci/endpoint/pci-ep-msi.c | 156 ++++++++++++++++++++++++++ drivers/pci/endpoint/pci-epf-core.c | 44 ++++++++ include/linux/msi.h | 2 + include/linux/pci-ep-msi.h | 15 +++ include/linux/pci-epf.h | 19 ++++ include/uapi/linux/pcitest.h | 1 + tools/pci/pcitest.c | 16 ++- 11 files changed, 467 insertions(+), 3 deletions(-) --- base-commit: f134785ecf3bd881a10f83dccacdcea2ac45e673 change-id: 20241010-ep-msi-8b4cab33b1be Best regards, --- Frank Li