From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from DM1PR04CU001.outbound.protection.outlook.com (mail-centralusazon11010004.outbound.protection.outlook.com [52.101.61.4]) (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 1249622538F; Mon, 10 Nov 2025 11:28:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.61.4 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762774141; cv=fail; b=h2m7tSknhPyqEqRAY4I1qHNbcPCZYfcNTAR7VBixGOBb7nuNSeCZe2vg7GSe87inhbcD3FT1yuyGrGJmdjf5aRJzpOkLF2duDNTUK00yFQfLtLz9d0b+M2GYIol/Uk/z2MLn258ni/jJ87rXQLLva8zm4TNfd4IMb87Xe+W1vAI= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762774141; c=relaxed/simple; bh=xZUYUcFVb+0wv94PyFsj9zvQZfLjx+kDDafGKhHGRh4=; h=Message-ID:Date:Subject:To:Cc:References:From:In-Reply-To: Content-Type:MIME-Version; b=A0Hxice5+sCUGxt9UmFS5gpJAkX6CCSnYd8O7hMjDPx1Q8C4tPb+yP8FhToGOOr/J35WHly5Urmt/lZghm1Wv3g06uME5Gb+Vekl4QJbuaoBPpNk8/JweDBC6cNGL7P571f+daJG7a5yS+7hzBlOx1F0hAmVtAHnsl4KmJOOQcg= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=gDURIWOb; arc=fail smtp.client-ip=52.101.61.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="gDURIWOb" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=T6UB9iz3NwzXDWwJWwX0+YqZPlvybGV6SNpsvPd9tBnTTsEsMPpUIcvwXx6Hi8ViFBPktHzZGkhTsY21WU5n5/cZUXaLqUzJHjyVEhdSLLMZemAZ4JgkEp/03W6TPErmhWxs3gWvU8fNwZGMYLNnaDK78VUGgqLEdotZhj/bUl9MAtqncQZwY6eLgN+AufIaMEMjgETgOUi+JzYaQK4JmrLAtUOpT3mVRLehsZPipaTniWKvYV6OQfwdsNC6/Bbhz9I8A0K4670wKKpYNAPVzEe1SG0BkbwVCp7GxRBkFP4WNQKCsQkyJRjrS3PuQXOjCLLiKX0f02UIXohS1KavVA== 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=xZUYUcFVb+0wv94PyFsj9zvQZfLjx+kDDafGKhHGRh4=; b=irp3EL241JsyhmgmMaMWVXYZQGKqK9glgoX+94kMV9w0BC6ZKcMyFXDRDEAvonufWH6cT5AIEc9St9Nsj8GyduX/OrLSWGgk7J5CmcHXjqUXvWsMuJwTMB1s1HHY+Sn/y8fI5VsZjrOoWKnYQfHqsmBmuEu29GHetAEv0xkNzZO6pg7mBLA+EHM2xjkmJzU5SZcn6Ww4a9+VYJ8lJmQ6uhIBQD/+op2c+Ny7XB4YlqDVSVS6e/eqZjUPonYn+ynVaHBgKMo/X1hffzRIP70QeZqBXEHMmX9Tzv4PfwTvx680uq70nUznzE0vEvw+TOrLkzRfS0jsjpozoQLJUH0Ulg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xZUYUcFVb+0wv94PyFsj9zvQZfLjx+kDDafGKhHGRh4=; b=gDURIWObU2czUFTgaRHzYnNB+GHFLvd4u5aFzfDApRpnPdZ2mrrJ+upOb2atK5JJdv8smBKywHxobF8/YalzYYoCAJ8maahpI8SLyPwuFMj929YPSawL/mwOCWu9Aj0xmUu3PVKN7YbosocGCp7S8XEt1zixe+u11dC+rNoVMlY= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from DM6PR12MB4202.namprd12.prod.outlook.com (2603:10b6:5:219::22) by SA5PPF590085732.namprd12.prod.outlook.com (2603:10b6:80f:fc04::8ca) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9298.16; Mon, 10 Nov 2025 11:28:57 +0000 Received: from DM6PR12MB4202.namprd12.prod.outlook.com ([fe80::f943:600c:2558:af79]) by DM6PR12MB4202.namprd12.prod.outlook.com ([fe80::f943:600c:2558:af79%5]) with mapi id 15.20.9298.015; Mon, 10 Nov 2025 11:28:55 +0000 Message-ID: Date: Mon, 10 Nov 2025 11:28:51 +0000 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v19 08/22] cxl: Support dpa initialization without a mailbox Content-Language: en-US To: Jonathan Cameron , alejandro.lucero-palau@amd.com Cc: linux-cxl@vger.kernel.org, netdev@vger.kernel.org, dan.j.williams@intel.com, edward.cree@amd.com, davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, edumazet@google.com, dave.jiang@intel.com, Ben Cheatham References: <20251006100130.2623388-1-alejandro.lucero-palau@amd.com> <20251006100130.2623388-9-alejandro.lucero-palau@amd.com> <20251007142200.00007840@huawei.com> From: Alejandro Lucero Palau In-Reply-To: <20251007142200.00007840@huawei.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MR1P264CA0136.FRAP264.PROD.OUTLOOK.COM (2603:10a6:501:51::9) To DM6PR12MB4202.namprd12.prod.outlook.com (2603:10b6:5:219::22) Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6PR12MB4202:EE_|SA5PPF590085732:EE_ X-MS-Office365-Filtering-Correlation-Id: 5699c894-761f-48f4-8333-08de204c5434 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014; X-Microsoft-Antispam-Message-Info: =?utf-8?B?WFhML094MEpua2xkQjNOa2MzZkdZcC80NElDM0FvdklFamV6aFhlSHFhMTRh?= =?utf-8?B?bFJpWDZGY0poMk15V3c1aHFoNlExNnl5aGk4bHZGT3YzSmE0cHp4bWJMdC9W?= =?utf-8?B?MzA1bGJpaDB5SlBSb3BBVll1Tk5JN212YW92b1BRN01pa2VlZ2tQTlM2cGh6?= =?utf-8?B?Rm95dEFHeC9OanpFV2cxZm9sNzExR3d1eVNKb1dEWnZvRm1VbnRJNWIwWklm?= =?utf-8?B?bFZKbzM4ZndPM3RMdUNOS0ZuM3dnZkU1NjZJNTRjbklxcEFNQW1DbitBeVBu?= =?utf-8?B?U1hVbWJvRHU1ckVFdjVXbFFPc3RZZThpRjg4WXFRemY5ZXVNWG5vKys1Z2w4?= =?utf-8?B?VlhtSEM0NlZEam5JYzZFYm8xWkptRXR5N1JmQnEweGZyQ3V6eVFTNGJTNS9o?= =?utf-8?B?T3pqYUZXaFNJZVl6TFdFczJ6RENsRGwweUxGVzBYbmlNdWRna1FuZ3hPTStT?= =?utf-8?B?MlRxS3ZyV1pzdkJPdWpuOEhDK2h2a1NhYnZQZTY0MXFhUXQ1VmhzV0dHcXFR?= =?utf-8?B?dTErYnZwejU1RHJrZkROZ2FMclRDWmtHUnoraWxwYzZidk5ycjhXc3RFOXVr?= =?utf-8?B?Mk40OUYzdkhQTUh6akZibDlHcHVxbHpKaW9GOVB6VnFQRGRGTWNnOXJTc2Mv?= =?utf-8?B?akVyM2sySE44UitJVk1mLytVYlc3aWRqaHNaR09JTUo4MWxQM0p0V1BZZFYx?= =?utf-8?B?MDNjWXZjcGV4N21Zb0NFT2cvdnB0RGpieitPYWczeTdZMlRXM28xbmdMU2pP?= =?utf-8?B?MlQ2SE82VjNtQjdWckJpY1FLaFIwZ2loNEw0bExVUFZENzdzQ0dOeVREU2tH?= =?utf-8?B?elhwVTJWV2FSc0tXWkRqcWhxL1VZR0VqQng1MUEwVThKc005SThTcGM1TW5r?= =?utf-8?B?TmZwQmxIQkR2NW9DbUhZTmhNb0NXMUtGSDZLL2crMFZCRlA5RHVCclYzbkJx?= =?utf-8?B?c2hLMCt5WExhdVczc013TVhmODJ2V0tKUDJoaE9XejN1M1JYMUd0eG5JbUc0?= =?utf-8?B?eUtuWmJJUFQzZnVPOWxZYVg5MWNOeTc4VFhxZGlsYk5qeG54NmMwV3o2aWNw?= =?utf-8?B?TXQxWWh3M21MZUVOV1RpcDI2UU54dTdURzJCTkM1aGJ3UENSRjRlVU9hd3l0?= =?utf-8?B?Vks4RlpRSnZMK21FSnBKSDJxN1UxcTZPTFcxVkw3R3p5OElua244VlJ4KzND?= =?utf-8?B?UHcyNkJVeGxyKzVJS0l2M1BGRWMzNFdxVWttZ1JUblhpakVyanVnNjBzdTlv?= =?utf-8?B?aVNtQTdDMVNGY2lqOWFDVnRnelEwS2M3SFlyLzZiQ3BOTXVZcDNiN0lIQmZE?= =?utf-8?B?cVZmVXgzamJFSVk3bUQyM1RqN0VBSXdDZWdDbHlkeWw2ZzVMdmdkL1drTnpp?= =?utf-8?B?NDdOZGc0Y2VqeVkwc2x3WEkzcm9MRFc3ZXdXVzlYTTBibVVCa2V4c0g5OEI4?= =?utf-8?B?eERlcldwQXV6bEFiQkxmYkVWSFJob2Vhbnl1OEd4TGtwZTNYQS9CMkxWYmtu?= =?utf-8?B?bDBnUzNuZDZCa053WWJzWElTRTNJckorTVI5TUpkT2NzV2Q0Vkt5OEVOY25q?= =?utf-8?B?S1lzTVJ5L2owenJsbzlaZWZQUjBKQ3dvbVlQblQ1N1diZCtkQWtwcnExcEhN?= =?utf-8?B?cmJnajN2SUZpOWNYM3BKektoQVRzV3RFRGw5THoybHYxOXY2cndXejE4RGJW?= =?utf-8?B?elNsSWQyNWZGNDdibUh4WE50b2VzdjhiM0tyY1dvN3pQQzZLSzlKaGM2aXl6?= =?utf-8?B?RHF1Sm5tSmJycU43akZHUStIcFhvRXplSnBUb0JFckFEWnJwVzhTVjdnU1V5?= =?utf-8?B?amFiNWRuSEc1T2RtVVJiZnFOYVlpdkxHNE1reUdVdk9PSVB2Q0FVRjRQMTRp?= =?utf-8?B?aDN2SkhXS3YwMVB4YmcyVDVKSTRNQ09lMjNjcFNVWCtVYWQxdmJ2YllqcGxp?= =?utf-8?Q?AbgxObHZyaeCFgATi5oGFHNwJGd+0SAl?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM6PR12MB4202.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(376014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?S25USkNaTUw2ME5Gbjc1MkJKZ09DVzdvdCtJVGNuNytUK2kzRk5FYTY4a1hU?= =?utf-8?B?VTRRbDBpWktuQ1dOUHdkUHQvSGkvaGYwcno1OHFQQ1RMUTBlcnZWNStnbnhh?= =?utf-8?B?VGJrWFU2TUdxV1BmMmFQSzdRUWJUWEM4WVg3Zkgrakh3WkNhZ0FVSzE2LytN?= =?utf-8?B?ZzBlT2JnWVFBb0dHc0VleHhvRTVhTENCQW1QdzVKcjdVVDVaa2ZhQkRqR2FU?= =?utf-8?B?eGordWpNZHllcW5rRzFWQ3pIaVFzV1Flc1dkRisxRVFDV0lCRzJReVdveVBH?= =?utf-8?B?R2VVTWc5TGd1K2RvL1c4ODdYM0JIbmxmcm83NTFYYXNzSXJCUVZBMWd3cG5h?= =?utf-8?B?ek9rYTZJd3dYS2pNTVZHbWpXSmVGZnl6aXdTc2c5elZlRUxzaGtwbWNGNzVx?= =?utf-8?B?aytPdlFYbytiZy9tNEMrcGdZVUJsdlZ0WnVWakFZbHovQ0s3SXhmYVFQdElZ?= =?utf-8?B?azJLTjI0Um5RUi9MRG96SGtqd1NuK3U1d1lkQ25KWVhMaGtnL3l4cG9MdDQw?= =?utf-8?B?S0hRdkhGV1FGUFU5SVd0QjFyUVlWS2hBRHk5M2N1eERnY1N6ckdLMTBRYnNs?= =?utf-8?B?ODlwMEdReWFWU1VuZ2VPQ2JYOXEvamZ3QklmRlNSY2NCdnU5d25CdmFya2Rn?= =?utf-8?B?c240bmJYTzFtQmRBNXMvR1dwVkgyUERMV3JHSit4MisxM3hRNy85SjhwTGpu?= =?utf-8?B?bFpPVkdOYjJHeFhTeWtXclVJeVRaU2dFdkdhdE9SZS8wQ2pDWjZDNzRFS29H?= =?utf-8?B?cUVKZUh2WUlLM1ZDTDF5SVFWZmZPendSOVNNVGNsTVZRelQvaG9IZjFaZi9O?= =?utf-8?B?RE4wWFpQNjFFNzUzRzJyMWlic2ZscnhaRXZ2QTR5aC93OCtUR21PWWJ1WDM4?= =?utf-8?B?c09iWnNVUlhCZUdTVFJYejNwV1dpR045TTFNTnBRTFlNKzFUVTZzSmhIdjZt?= =?utf-8?B?Snc0dUI1NFU3ZTd0TkFhUzBYQkdUU1FYTUlsVkQ1YkpDY0huRlk5eWhSMXps?= =?utf-8?B?RGZUcWU4aGJXaEpjWkVYTU1meFBJMEhsK0NOb1ltRUlGOHViUVNOVi9QdnFq?= =?utf-8?B?T3VDR2c3ZUVVKzRJNDhSdkdhdnNucWVSYmVGK1Yxcm1VRmdFYkRMbmZOSU1q?= =?utf-8?B?dFRCNmhXZXZlVHFBZWFBQkhlV01DZ2VpZkIyN1orNTY2YmFiSXhHTWF0TWg4?= =?utf-8?B?M21tWGkzRGVKWTMrd0xLSlQrQWJEVkJJeTlEazdLZ0pYMEN3R1ovQlNmV1l4?= =?utf-8?B?K0RYRVNlZjBNTjFiU3FkQlJxTEVUUER5WVBiV2xOdkwwTVE5VFFtTnE2ekJL?= =?utf-8?B?UC9lZ2RPek9xckNiUldrd3BsNUZvSkNVQjNYUlhFODRJZUtMemh2OWJIbGxi?= =?utf-8?B?aVZzb1pDWjNDdHR0Wm9iRzRQMHZzRkhrQVU5ZWY2YUxSTEM1LzRlYTFjMzJH?= =?utf-8?B?TlJ3S0tVOTFyVytwMjhrWWlGOTc0eWIwaVlCVzZvOHV0ZmVtVHBJbktTaWdi?= =?utf-8?B?T2NWTzNNKy80TkY5ZDkvaHQybi8zdk9MMTV2UnJOQ3ZYUDV0VDdEZXFsMnlE?= =?utf-8?B?NEd5bi82THJzSnBIUTRGcEVJN2luY2EzK21vUHFENXAveE5Sa1o5LzI2YVJs?= =?utf-8?B?eE40T3I5OVFGY2htNEdaaFl5bWdvL1prZUIvMk5mWU1qVjdOR1BLR2xRazV1?= =?utf-8?B?cW1wNmc3Y1Y1TU5mNVNBOFJQNXg2bjZESmR4bG9aaTlQRzRiM2VvQkVpc1po?= =?utf-8?B?TlpGNGJqb3dFUjkwdlI0eG8zSEpCQ2g2RWNrVTgxb2p1c1c1ZjFSZU0wa3N3?= =?utf-8?B?K0dUakZHY0laN292S3d4bHlScjBxak5sbG5ralJQNDQ0R3FaWDZjblNoMlhW?= =?utf-8?B?Y0N4ZmpsUm9iS1pjbXBUSlhMa0hiQVBsNlFtTUdMTjQ0aG1yaWtad1ZQN2tK?= =?utf-8?B?WDVzNGZ4RStXZDVhSVhML1d2WkVyVzg4bDdLRHFDaHA3Q1BMenV5UnBSazdj?= =?utf-8?B?UVdlYVRaMHNnZ1BYZXRGTXFRbTh2NlRodlNwcDFwaTQ3TmF5aGZHVG44KzV6?= =?utf-8?B?MVk4MlhwWHg2cmo1bllZR2ZlbG5UOWU0NmtKVWVRb3F1SEtFTHRRYUNFcE1h?= =?utf-8?Q?Z4VCStEcAmmp40pJrOINV1pdJ?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5699c894-761f-48f4-8333-08de204c5434 X-MS-Exchange-CrossTenant-AuthSource: DM6PR12MB4202.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Nov 2025 11:28:55.3636 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: s4y1eFLP6bFLF8pD0VEIL9kJFM42uHNp6uZQJcSSsdOiSm0IwbvUXXbLmiluq05bUiXnkoDAN1MEDxnZ9WaHTQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA5PPF590085732 On 10/7/25 14:22, Jonathan Cameron wrote: > On Mon, 6 Oct 2025 11:01:16 +0100 > wrote: > >> From: Alejandro Lucero > I think this also needs to mention sfc in the patch title as we'll > need an appropriate RB/Ack for that part. Right. I'll do so. Thanks > Lazy option would be > cxl/sfc: Support dpa initialization without a mailbox > > but there are probably better options. > >> Type3 relies on mailbox CXL_MBOX_OP_IDENTIFY command for initializing >> memdev state params which end up being used for DPA initialization. >> >> Allow a Type2 driver to initialize DPA simply by giving the size of its >> volatile hardware partition. >> >> Move related functions to memdev. >> >> Add sfc driver as the client. >> >> Signed-off-by: Alejandro Lucero >> Reviewed-by: Dan Williams >> Reviewed-by: Dave Jiang >> Reviewed-by: Ben Cheatham