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 075DEC0219E for ; Tue, 11 Feb 2025 19:27:00 +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=rvCn+Ggv3GXEmXTt486rBCKpXSrSq6d1Imq3HVo70dI=; b=SDTR6VEcA6jqpW/0YS7iqGKLmw sFA+XeR+BVLyc0U6g2u7QN4SohT3CjqI3Egmm6lDpodqvncip65loBgl66Dc7nd5kdJ9vZBGW4zWo 1AGGfr7Ll9uSymEwED+7XvtPuYbJ5kLCN8Jz2bAz+leOMfjwm0Az5ggWMETR/O3PhtBsQLGWhNy6Y vHifrPJgssIpDVCyYg33tO9n8QWSWQxpMGqiLg66weTABlxLcrcqQ/FSODZmZ4NueMNKg5zOFOl48 E0EjXrsvCJFW9u4UCDZwDuPXME1a/n03mhzYXBIcMNdt3M/wvyId3xj/q+1T0fn/94wF9kh1N6yAX QJhRHj+w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1thvuC-000000051BC-2Wvv; Tue, 11 Feb 2025 19:26:48 +0000 Received: from mail-norwayeastazlp170130007.outbound.protection.outlook.com ([2a01:111:f403:c20f::7] helo=OSPPR02CU001.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1thvpp-00000004zUY-3d3Z for linux-arm-kernel@lists.infradead.org; Tue, 11 Feb 2025 19:22:19 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=VMMcGvxXfw8/Si//AZjt6RqYag1Gdk+qa7fHABvbM30K+MC87zjKzRm+P2sf+LETFccLImhxwMSCo8K1FXgePClkTjJrSGVRZowClg7qPpkbRwQ+d+SWJWhvfOoT0qgGyDdwb26FaKVERKlDTApb1C4aTm/L7RAXz9TjQViZfN5d0dyIiLDtlgBE8YPz6PSywG7oKQvVuBOj3Ej6/Alpt2j9/+2SV4mBvBISPXkpQefaWgCdH70l/ID1Q3w0Df2hDmKfHbI3/to9DuVlGhMuJgzoNQBcf/vx4WnOYOa6OuZQSCb8iMyXm2+S9Bm0E53B0fXsNDXGkfhfuhYoNyxfxQ== 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=rvCn+Ggv3GXEmXTt486rBCKpXSrSq6d1Imq3HVo70dI=; b=Cif2o0BhLf8W+ol914fykbmsYLJkHmpS3Jr2L8X/yZ8X38mx4oa6ChadyaqifHH05ltExihuqHJRGpNhdv6YXuLDfIUEFfhBuLZlDYSovwM9DC6sbPOrtPC0j1vaeJgRx6n4y8tT6oKrlJXwQEpDRas9ib9PP57sp3KA1KGRb3fEcuVg/iRnWgTO9ylA5UrfJD8DaSqvOdXDcBviSj2AZ5RBDDYmgSO8m9O4pyOey1rKYBhb+9QDojj2fo5u1cPkNCA92N93K3f5fyHSJIhszrWMoA5+xA5TCtyVDRZuQQ9SgtFqDOVZQuLP3z0AvFBpWs61rbu1af3DrwUqtF4hAA== 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=rvCn+Ggv3GXEmXTt486rBCKpXSrSq6d1Imq3HVo70dI=; b=c+k/ebEEwEdDfinNQhkyJsA/HFvvBPM3u9Wrr8uPwduFz3WhcVC3Qub+INT0XTIOln1whtgAf44WioSHfw8PnBt0FvL+PgPJawLxRXuP8uKbSGlTpzDWEo6h2mIx0ezFALc4i1CP/isCoxnVghZqz6V4nLcLHrWLo/Rlx+WHN1LuEbcUCX5NpNPbfRHWLt5zET+RpstI/VfDovddwCpUyEIwDA6T9d8pdanyU8Ukp+RtSh7TA7gzrx7bMWPAt3apV1leMBNr1w2yhx5EAmjVbmL+RZbvwnrxn+ENXwbcr9rj+rpG0S5UgnOtmkNiEPRJ6JGxFW76IquiFjJh5/h4pA== 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 VI0PR04MB10291.eurprd04.prod.outlook.com (2603:10a6:800:245::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8422.16; Tue, 11 Feb 2025 19:22:11 +0000 Received: from PAXPR04MB9642.eurprd04.prod.outlook.com ([fe80::9126:a61e:341d:4b06]) by PAXPR04MB9642.eurprd04.prod.outlook.com ([fe80::9126:a61e:341d:4b06%6]) with mapi id 15.20.8422.012; Tue, 11 Feb 2025 19:22:11 +0000 From: Frank Li Subject: [PATCH v15 00/15] PCI: EP: Add RC-to-EP doorbell with platform MSI controller Date: Tue, 11 Feb 2025 14:21:53 -0500 Message-Id: <20250211-ep-msi-v15-0-bcacc1f2b1a9@nxp.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-B4-Tracking: v=1; b=H4sIAFKjq2cC/13SyWrDMBAG4FcJPldlFq099T1KD1obH7JgF5MS8 u6VA7FlH0fo+xlp5t6Neejz2H0c7t2Qp37sL+daoHo7dPHozz9Z9KkedAQkERBEvorT2AsbZPS BOWDIXb18HXLpb8+kr+9aH/vx9zL8PYMnnk9fEeoVMbEAEXOK1nnUEf3n+XZ9j5dTNwdMskGMC 5IVGTTJU3IukN0itSIEuyBVkUfpFEZIAGaLdIOQFqQrkqo4Q5Q50q490yK5IFNRkj4a70tIFLf ItkgvyFakCxZtS0kYwha5FRHwgtz8Jg0pRC6oUtoihFat/dUJgrAmsrFVJr1n2DK3Mpy/XbIs3 rIzYc+oYbgOq/4mCOYkFVPximDHuGXruHDeDC11JnSUIskdW1ZDAYFZ2bwbThsMyLpQaHbj8Xj 8AzKhufXsAgAA To: Kishon Vijay Abraham I , "Rafael J. Wysocki" , Thomas Gleixner , Anup Patel , Kishon Vijay Abraham I , Marc Zyngier , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Manivannan Sadhasivam , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Kishon Vijay Abraham I , Bjorn Helgaas , Arnd Bergmann , Shuah Khan , Richard Zhu , Lucas Stach , Lorenzo Pieralisi , Rob Herring , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Krzysztof Kozlowski , Conor Dooley Cc: Niklas Cassel , dlemoal@kernel.org, jdmason@kudzu.us, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-kselftest@vger.kernel.org, imx@lists.linux.dev, devicetree@vger.kernel.org, Frank Li X-Mailer: b4 0.13-dev-e586c X-Developer-Signature: v=1; a=ed25519-sha256; t=1739301723; l=10831; i=Frank.Li@nxp.com; s=20240130; h=from:subject:message-id; bh=J7HfnSyU8azP0i+o1RPxj1D0gtVxDW0e9yd4XZUBqzc=; b=v08axDfA61CNKB9TW3Pu1KNJpoBAVNk9T9wswCmj/X7ojrStvBirh7YuMbs20k8chFe+zjSTn sqwQhVxocD9D+rJWpFcvIHKvtFy5fZiadcRCvdYy5Qvn1hr3srCsfMq X-Developer-Key: i=Frank.Li@nxp.com; a=ed25519; pk=I0L1sDUfPxpAkRvPKy7MdauTuSENRq+DnA+G4qcS94Q= X-ClientProxiedBy: SJ0PR13CA0231.namprd13.prod.outlook.com (2603:10b6:a03:2c1::26) To PAXPR04MB9642.eurprd04.prod.outlook.com (2603:10a6:102:240::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB9642:EE_|VI0PR04MB10291:EE_ X-MS-Office365-Filtering-Correlation-Id: 3a287d55-44ab-4763-dce7-08dd4ad16243 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|366016|1800799024|52116014|38350700014|921020; X-Microsoft-Antispam-Message-Info: =?utf-8?B?L2lPWEgyc01ETWlzWEZmcDVSTk5hTmNXWE54Uklka0tTeUQ3YVZyWmpCWW1O?= =?utf-8?B?Vzd2TTVXanBXa0Mrd3NGM0s4MzJ4QWFsYm9aL1p3NVFENjJSYW1uKzgvZFJB?= =?utf-8?B?TStmNDlPaTZQVE84SkdRYy9hcnd3dVNxVEtHdE82V1Q5R3NaaWRLa2RXcjRt?= =?utf-8?B?VFlCWGh3blMyNzVRWHlpcW5mOGJFc3RXbXJqbEdHMXZ2RjhONmZoZmZCT2po?= =?utf-8?B?Yi9kRnVhQVBkZjM3YmhZWVBqdDllaUxDMElOYXAvLzdoSDZiQStrTnBOSEgw?= =?utf-8?B?TUFYeS9UcE9ONk90UHhFMjRlK21GdTBwdmw1NFFGNVFrZVp6a1ZjVVp3Zlox?= =?utf-8?B?a0k1UUxmMVNIUWViaHJ0OTFEN0dxbkpJMW1Ga2NtWWVhL0RLZ3FISkduTHBY?= =?utf-8?B?ODh6UXBIUkt1UVV5R0M0dXZybHUrRm1GQkFKSkV3RERHay9xYysyQmk4YThW?= =?utf-8?B?czdlV2Q0RVVLd1Y3MjFER0NSaURTOEI2NGlkdWxEekZBajhIUTRVTVkxU2Jw?= =?utf-8?B?d0JGUXdNRHQzeGR0TUkyUDZGWGN1Q3QvczIrS2hOU1d0bklkMTZPVEhkeG5X?= =?utf-8?B?Wk5JMFFHZzFaQ1dZYjNlOTZySk1SVklzZVV2djJoeG0vQ2tzalZNeW5ldDZz?= =?utf-8?B?TkNXZ3BvVStQcVhOZWsrZlhwZzFnREZXdkdFeVRHV3gzRlE4RWhpeEhiMGFH?= =?utf-8?B?K29QTVhlTTBBZjJmY3ZkTnlQVTZPbWMwNHRNSFMyMjVPNUJiZE9la0xsd3dp?= =?utf-8?B?ZEtHc1d1b0hMSVk2azkxcnRBbVlTNmI2dERqNG1SUXE3d2FEWDlpUGtJUmh5?= =?utf-8?B?eTNvbzJRZENzVVRYQmZLbXNTc0dwaS9ud3hNYWRDWHJnZDFxN1I4cjBuRWhN?= =?utf-8?B?MVBrOGNTbU5VRFVNYXREYzNjYnJjMW1IbDFlZVFUVUE4SjV5cnhtS2VDV2Np?= =?utf-8?B?dStxTEd3OUlQTzZONnlETmVKMENNaUVhQkRNUmFrMGxHU0hEL01LNWs2TEc4?= =?utf-8?B?a2sxNFh2eEQwWVg1Wms0V2N3MXFvRkxGNVIwZjdQaHYwdDYwS05hT0d5Ykcr?= =?utf-8?B?b2RyN1ZuZ0NiZy9TWEVibVhHS3dnT3RlQ1VYb1A3LzZaUWZHb0tZTlZMQ2Rh?= =?utf-8?B?NXMrVll2anYrcHJsYy9NamRKWmRYZFNEcEUrb29tdVhYTzJ6THNEcDhBd3Rz?= =?utf-8?B?YWNCT0hQdGVuQ3VuYWo5bGJrTmlKbWlxWTN4NlNLRUthL3hZU0t1czJiOGdo?= =?utf-8?B?NTlxb0REaTR5UG1UZFZDQWw0blFFQSszWVF5ci9YK3gxaGMvbFpNVHhkcnkr?= =?utf-8?B?TUEwL3ozbGxoN3ZMNXphYmJGdDZwSW5OcXp1NXhJOUx4SGdBK3B1dlBiWFV5?= =?utf-8?B?Rm9CVmlzeUNBS1U1MHIwWmRxR2lvQmtRRXdxYkx0V3pkYklpYU9uZ1U3Tk9H?= =?utf-8?B?WGVWeWZ1RnovR1Vtb3MrdFd4WW1URWJxemxiVTI5dHlCMFZmRlhJS0xEdlFV?= =?utf-8?B?alE1UzFFWFl3Y25uckE3eU1qVitLSEU4UGRJQ0JKWGpBei9uMFhnWVBvYjdU?= =?utf-8?B?RHlOR1VSWkF1MnBkdjBPdFV6T2dRcm5BR1lYb3RxM0dWR1lhTjlZT0M5WmQ3?= =?utf-8?B?VlpRL0h2V0xHdVd1RnJkWlByd2FxcWlDLzZiVnF5ZDQvL3llaXRncE5sSlJ1?= =?utf-8?B?TXdOakRoTGJvRDBJQWJzaWRJVjh3a1ZrdXpBakhDTE8vWEFnSTRNZUVsd1NU?= =?utf-8?B?dWVFRGppbCtybnVxekxlMmNmNmZJOHhVc1d0UmdpY2hHNzdLUDdJRmF3cC9R?= =?utf-8?B?anFGOUJtYVVUMTd5N0Uva21RZlhMUVRGNkphMXYxRUdpcU5XenBUUkhUWStE?= =?utf-8?B?akJ5czZYNkVQOHk5bkFMRzlET1pGQzRMZkJGdnBiSXdjS0Y0N0tvTDZqZnFq?= =?utf-8?B?TE9xbjhRUDRVejd5WHJQeFEzVWk5a0FaaFdwWlN6enp1eUhsbXJlYTIzSnM4?= =?utf-8?B?V1lVMnJMbG9nPT0=?= 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)(7416014)(376014)(366016)(1800799024)(52116014)(38350700014)(921020);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?czJCbFAydzlSZnQzVmpKNkV6bHgyaFNnWVFwS2RPYVlqdmhSM0xweGdBZUVS?= =?utf-8?B?WkxjTS9ZMzNBWk5qUGJxeTREVzZYQlVBNUI2OVliUnZoY05iZ0ZQNSt4UFZ1?= =?utf-8?B?blcrKzRSaHowUXcvS1RRcUk4c0hRS0JGNVRhVkUxZWNGT21PMmxaVjl4d1dJ?= =?utf-8?B?UWVNWm1UU3R0cU9vTElTZVN1QkxrU25UVmdnYk5rd2FBTVBEMnhLSmR3TlNL?= =?utf-8?B?YS9oOFpkMFV5bHVpdFQ2dWZvY2t3aHhUZjBiUHE1YzdueUQxUjl0RzEvWEpj?= =?utf-8?B?R2lVQ2EvNi90UzVpRVlqakZGRXBXZjhuVFM0anM2ZW5pVFkrcFNab3dkSUlj?= =?utf-8?B?NkU2blYvVWtNKzA2NGFXMHd0aUtFUmk1TUVUNDE5TDUza3FpS1pra2Rvakkz?= =?utf-8?B?NDI3YlcyTmltQS9BU2JFTUN0Q2xkc0N1K0cxWFVhRVN3ZVBRY0JiWVJLL3F2?= =?utf-8?B?V2FOZ0NDK1NBaXBvVzN0aUdIbXJITzhWdFhSRVJmTno3ZW9tM2h0ZXlvSFpj?= =?utf-8?B?eS9uNjRmYWt1dlZjQ3lHZjJEYWdVeHBrSEg4OEdxTS9kcWU1SFQ3U1k4UGh3?= =?utf-8?B?ODUyUVVqSDVVblBsYnV2bXJvUGh2QU5rWVFjOXZHVlFNVWRGVWNGUUFubzZY?= =?utf-8?B?SlhkQXExK243SXFwZ1FZVTgxd1EybDJqTjRYdXFHWkJTbXBCNW51WkY4NEdt?= =?utf-8?B?cTl2cTBjS0Qzdk1BTkFJMXhXbkp2eFhUamJvS3p4a3E4UWlnbW1hdmFyT3pw?= =?utf-8?B?K0k0ZnVyT1NJbGRWVE1iRXNGYkhmczJlbFJ4cW0rcHBjamwxRm43U2JSSVhD?= =?utf-8?B?Qm0rUVovcW93aTNmRFdpd2g0dGZMMHdodUhQcElna2xkYTltWXlrT0JNKzh6?= =?utf-8?B?L1pqRXIxZk5zMlZpQnVjOGZuODh6ckRnSGxhUjNiZWNFRmNMWlpnTnNWRHNJ?= =?utf-8?B?eEVOZEdTU2dxcGxyM2MwcHRCTFR2OHpJSFFpcjNlZnlyb2s0YmJMcWo0bHRJ?= =?utf-8?B?eXJKdE9GU3ZaUkh1N3RjaFVJc3ZtbUdyQUQwTGp6VEhQMnk3R24rT3NSTlRk?= =?utf-8?B?ODI5YVRXSW9Va0hLTEJDS3orYjZ3OGViZTI4M056ejNjQW1IbW9FT2ttNE1D?= =?utf-8?B?enZSRk5tTFkxZDh3am9BTktOVldaU2VlRTJtcVJqRTFWVWUrMUZwbjRDN0Jt?= =?utf-8?B?RDU3NE5xSlhCbXhueTQrazJ4K2xrWEhmT3lhTE5jSENKMkNKenhwdVNjeFlZ?= =?utf-8?B?ekdtU1o4WTlJTmtTc0lJb1EzaW1aWnloeEYreEpkRjhyMFowdTFseWVPYnJ6?= =?utf-8?B?b3FVb0J3dk1wQ0ZScnZrRmcyNGtvQkNoRDNENjBIYjRLZ3VUNUxHRjJ4dktr?= =?utf-8?B?ai9yOTlLWDVoWWlaUEwzcUtkbzM1UVMycGl4N1M1TWY5aWpMRUltQnd0ZHU5?= =?utf-8?B?cm9iNW9OeVZ0aFBmMDRFTU0yUHgwci9sWWdZMXJPR2ZoRkhyQVZxeG1iSHBu?= =?utf-8?B?K1N2ajQwWXhSUW0wRU1HcVVMalhTY2pNaG1zdFFISkxtQTJVRmVtSzBzVHR4?= =?utf-8?B?ZEMzRGplL3BXYVQxbzRVekN2NHpqRC9sU0ZqNHBPdUJueVkzVVdRU1RVSEdU?= =?utf-8?B?TmZvbHBKbkdLaGxPcjRBeG5tSWxWOVFBUzNrLzgzUkFnejJNVmpqU0lkYkEx?= =?utf-8?B?d3BRYUpwQmdaLzB3d2pxZXVKNlNyODZqbHhYSTk2Sm9UMTV6SDAzOFpKYlNu?= =?utf-8?B?OExra2psSERpQmJNWnd6NnFUVHE3UGZBb043enNtVnZ4TnUxaGVSR3pHYUhh?= =?utf-8?B?SnFaTnRna0Q3WlVDeEZpakIwY3AwWDQ3b0o3bzF6ek1PaUd2OTh5ZExxWm95?= =?utf-8?B?NCtCbnE0STY2Z0duUW9SdmZuNFBURHdDY1VlbHRNam5rZU5UT05NMUVtdFVJ?= =?utf-8?B?TlcxUWhwaXdqMTk5ZHIwMjB1ZEJPUDNqdnBkTEJZU3Q4aFN6a0hwaHhwaUhM?= =?utf-8?B?QW1sUFpIUVNXWU9QMHU4SFVnYUtRakkyemd6K0U3Q0VDYkVWVjh1OG9Ya0VZ?= =?utf-8?B?b1l0VjMwbE1ZUENkMDErNzJreC9UT1Q0WFlCTXJLT1N1ZG5sT3B0VWRvbTVo?= =?utf-8?Q?IrfwS4+Pt8CIUddP/ZQ9DxxCK?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3a287d55-44ab-4763-dce7-08dd4ad16243 X-MS-Exchange-CrossTenant-AuthSource: PAXPR04MB9642.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Feb 2025 19:22:11.6322 (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: PJrRtJUb0nbwCFqll6VuB0X/T2BsdGtysPBpdknwOCdEwiHo+qHsRrI2amQFlMtWFIrt0Jw4jkgcLoACat/Xog== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI0PR04MB10291 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250211_112218_085656_9B9F9557 X-CRM114-Status: GOOD ( 12.01 ) 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 v15: - rebase to v6.14-rc1 - fix build issue find by kernel test robot - Link to v14: https://lore.kernel.org/r/20250207-ep-msi-v14-0-9671b136f2b8@nxp.com Changes in v14: Marc Zyngier raised concerns about adding DOMAIN_BUS_DEVICE_PCI_EP_MSI. As a result, the approach has been reverted to the v9 method. However, there are several improvements: MSI now supports msi-map in addition to msi-parent. - The struct device: id is used as the endpoint function (EPF) device identity to map to the stream ID (sideband information). - The EPC device tree source (DTS) utilizes msi-map to provide such information. - The EPF device's of_node is set to the EPC controller’s node. This approach is commonly used for multi-function device (MFD) platform child devices, allowing them to inherit properties from the MFD device’s DTS, such as reset-cells and gpio-cells. This method is well-suited for the current case, as the EPF is inherently created/binded to the EPC and should inherit the EPC’s DTS node properties. Additionally: Since the basic IMX95 LUT support has already been merged into the mainline, a DTS and driver increment patch is added to complete the solution. The patch is rebased onto the latest linux-next tree and aligned with the new pcitest framework. - Link to v13: https://lore.kernel.org/r/20241218-ep-msi-v13-0-646e2192dc24@nxp.com Changes in v13: - Change to use DOMAIN_BUS_PCI_DEVICE_EP_MSI - Change request id as func | vfunc << 3 - Remove IRQ_DOMAIN_MSI_IMMUTABLE Thomas Gleixner: I hope capture all your points in review comments. If missed, let me know. - Link to v12: https://lore.kernel.org/r/20241211-ep-msi-v12-0-33d4532fa520@nxp.com Changes in v12: - Change to use IRQ_DOMAIN_MSI_IMMUTABLE and add help function irq_domain_msi_is_immuatble(). - split PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check to 3 patches - Link to v11: https://lore.kernel.org/r/20241209-ep-msi-v11-0-7434fa8397bd@nxp.com Changes in v11: - Change to use MSI_FLAG_MSG_IMMUTABLE - Link to v10: https://lore.kernel.org/r/20241204-ep-msi-v10-0-87c378dbcd6d@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. Signed-off-by: Frank Li --- Frank Li (15): platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() irqdomain: Add IRQ_DOMAIN_FLAG_MSI_IMMUTABLE and irq_domain_is_msi_immutable() irqchip/gic-v3-its: Set IRQ_DOMAIN_FLAG_MSI_IMMUTABLE for ITS irqchip/gic-v3-its: Add support for device tree msi-map and msi-mask PCI: endpoint: Set ID and of_node for function driver 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 selftests: pci_endpoint: Add doorbell test case pci: imx6: Add helper function imx_pcie_add_lut_by_rid() pci: imx6: Add LUT setting for MSI/IOMMU in Endpoint mode arm64: dts: imx95: Add msi-map for pci-ep device arm64: dts: imx95-19x19-evk: Add PCIe1 endpoint function overlay file arch/arm64/boot/dts/freescale/Makefile | 3 + .../dts/freescale/imx95-19x19-evk-pcie1-ep.dtso | 21 ++++ arch/arm64/boot/dts/freescale/imx95.dtsi | 1 + drivers/base/platform-msi.c | 1 + drivers/irqchip/irq-gic-v3-its-msi-parent.c | 8 ++ drivers/irqchip/irq-gic-v3-its.c | 2 +- drivers/misc/pci_endpoint_test.c | 81 +++++++++++++ drivers/pci/controller/dwc/pci-imx6.c | 25 ++-- drivers/pci/endpoint/Makefile | 1 + drivers/pci/endpoint/functions/pci-epf-test.c | 132 +++++++++++++++++++++ drivers/pci/endpoint/pci-ep-msi.c | 90 ++++++++++++++ drivers/pci/endpoint/pci-epf-core.c | 48 ++++++++ include/linux/irqdomain.h | 7 ++ include/linux/pci-ep-msi.h | 28 +++++ include/linux/pci-epf.h | 21 ++++ include/uapi/linux/pcitest.h | 1 + .../selftests/pci_endpoint/pci_endpoint_test.c | 25 ++++ 17 files changed, 486 insertions(+), 9 deletions(-) --- base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b change-id: 20241010-ep-msi-8b4cab33b1be Best regards, --- Frank Li