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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8F8AC433F5 for ; Thu, 30 Sep 2021 05:07:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CEA02613A6 for ; Thu, 30 Sep 2021 05:07:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238841AbhI3FHt (ORCPT ); Thu, 30 Sep 2021 01:07:49 -0400 Received: from mail-bn7nam10on2046.outbound.protection.outlook.com ([40.107.92.46]:3841 "EHLO NAM10-BN7-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229918AbhI3FHs (ORCPT ); Thu, 30 Sep 2021 01:07:48 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Jq2NR55RtAcAZ9nD8fYXv8wWYQWhcDN/SJXpp3QMqsXieKLoPYMcGUbxR4aU/5s21VBYyzHa6Wq0JACIvYkPhu0B0msnZqDRl2suiD2zrPuJmhegxq+MHkl2fKUKczIYwthmECOgLbQVMrfxZY2yviYtuf9a4k/HbggOHkCPV6IWt4RlRU4Y7kRMZumrfaB1B279kMogKVJ7VGwB22+gaIstEPQ/DMLW6wTu8xEYHKRcyog58tHsQUwaE0cIS2jOWPidRJNkq4rQf44hA4JsONARW6aaEUggNIl/rVLC9XMTDpSdToQr5Q8QB2tcqdC7gM55TqJnVrcESgriYbIXsg== 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; bh=n4apOFsF6g5BVOtw89xtPAjefBg3Zju1qz1MqxDBEXc=; b=OW8Pra4iA7uXUA0jSrw7GRVw4de0VyQInaaXW/8n78vNM1KgfcpLM3hTbwQjYRiapc6g6I9bCw35Js7DXlw6ODJHyC0RByfBy5EJCWL8h8AUiaAxBAIolnXBGOPdROUHNBKUVB91ZRQmD4wwjNJOzpo2mzNTeiHMQ7TF+8htw65FKm2x8HUlUz1ukgtGEBeK1ePOZFo+n+H28XUSULA7PLCNVYfH0K7KEJZ4LNB6yYzYQH3sQJJKffKogARnjkjOwDz/6QxzSlMJdlr7zzDObTokXAstTIfSiHZx1ExjHOAFA5jF3e+ILAM2LMiFaLgQ/mtdefQ3+JFM0aggee3Ztg== 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=n4apOFsF6g5BVOtw89xtPAjefBg3Zju1qz1MqxDBEXc=; b=l9Px9BdZ0EH0PuGsTcwRRWavVViKqAalEQIM0VBwEXsBmYKwwDeAKAAFnzr4ybxy2r0rGR7wANkcUSLTGWyeC0Xam+W4edMDijpoNqgMnZ3mLi8lfUc1qQHV2ql3ps1mZr9PxzIK+1np7p7PR6HlTEQV0Wl3ILRep06bvtFS9KYQ/M77jgcIQ4WT9uN4TpzwqQT8tOafYCE/ToGfgvjK7uHHBFntr2RkXanM/1x5+bX5c2y/4F0VnFi+fY4ugPIetWXeTCrgJfQ4OvfCmzsUUuBe/jVUtE8cLvcfXrSm2q3FVKbCyqlQ5qqFu95idLZGzDO1HqwzcU/Sga07cHGEMA== Received: from MW2PR12MB4667.namprd12.prod.outlook.com (2603:10b6:302:12::28) by MWHPR12MB1199.namprd12.prod.outlook.com (2603:10b6:300:10::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4566.14; Thu, 30 Sep 2021 05:06:04 +0000 Received: from MW2PR12MB4667.namprd12.prod.outlook.com ([fe80::3db1:105d:2524:524]) by MW2PR12MB4667.namprd12.prod.outlook.com ([fe80::3db1:105d:2524:524%7]) with mapi id 15.20.4566.014; Thu, 30 Sep 2021 05:06:04 +0000 From: Chaitanya Kulkarni To: Logan Gunthorpe , "linux-kernel@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "linux-block@vger.kernel.org" , "linux-pci@vger.kernel.org" , "linux-mm@kvack.org" , "iommu@lists.linux-foundation.org" CC: Stephen Bates , Christoph Hellwig , Dan Williams , Jason Gunthorpe , =?utf-8?B?Q2hyaXN0aWFuIEvDtm5pZw==?= , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Jakowski Andrzej , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin , Bjorn Helgaas , Ira Weiny , Robin Murphy , Martin Oliveira , Chaitanya Kulkarni Subject: Re: [PATCH v3 09/20] nvme-pci: check DMA ops when indicating support for PCI P2PDMA Thread-Topic: [PATCH v3 09/20] nvme-pci: check DMA ops when indicating support for PCI P2PDMA Thread-Index: AQHXq1RfNFWZGZ0XhUyLU5ISdBtHSKu8GxKA Date: Thu, 30 Sep 2021 05:06:03 +0000 Message-ID: References: <20210916234100.122368-1-logang@deltatee.com> <20210916234100.122368-10-logang@deltatee.com> In-Reply-To: <20210916234100.122368-10-logang@deltatee.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 authentication-results: deltatee.com; dkim=none (message not signed) header.d=none;deltatee.com; dmarc=none action=none header.from=nvidia.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 777e5a4f-a1f2-4c79-5cf4-08d983d000ee x-ms-traffictypediagnostic: MWHPR12MB1199: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:6430; x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:MW2PR12MB4667.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(366004)(38100700002)(86362001)(5660300002)(7416002)(508600001)(26005)(122000001)(2906002)(36756003)(54906003)(186003)(4326008)(66946007)(6512007)(31696002)(110136005)(316002)(71200400001)(38070700005)(6506007)(31686004)(66476007)(83380400001)(76116006)(2616005)(8676002)(8936002)(91956017)(6486002)(64756008)(66446008)(66556008)(43740500002)(45980500001);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?utf-8?B?ZlRmc0V0UEJGUWZQa1FsY21vdUQweUpFYU4zdGhlNU1tblltRnk3WVc3aC9U?= =?utf-8?B?ZTlMR080MnNQV2VWR0tjWEY5aXpzVG1RZ1JTZ3hvWG53OXFQakxUNVBHZHJE?= =?utf-8?B?czdpcXBSakpEMWRUMFFZdzZsQlFVNVFhT2VVaWRDeWFQMGFycWNQRVJxRjFO?= =?utf-8?B?Z3ExY3pUd2dPRmwxOXRLUURYeTAvNFJDM1dPMGFhMkZNKzV1VTRHUWc2THdK?= =?utf-8?B?R1RndzBqV0tsVWtvMTlDRTFTYzRYeVZJNDRkODEyK0I2MUs1Umt2MTR5U1dv?= =?utf-8?B?SXVmcTNTdWd0R2JsZ0ttVWNGblBmcGJRZXdvS1NoUHc5MUtFbzVuZmRmMWNF?= =?utf-8?B?QnUrdTFvcmpKV05uSDdua1ZQam5Oenh6Y0hDTEhyb2tQdU12N0h6ZHRJblMz?= =?utf-8?B?WnpBcUJ6OVM0LytNcTB4TzZXcDNtblV4azJHUkx3SkFTY3cvL3djOXdudDBL?= =?utf-8?B?NmlNQm5nQXFqVHlWVnRHdVVhOVU5Y1N4WmJxSisvcnpWUmx2Wks2SHZxQ3JI?= =?utf-8?B?UDQ2VHJ5NFFTTEZOK0NxVDBKdDlwaUVieE5SYWJqYkxSQzdabFBKVi9YNlg3?= =?utf-8?B?M1ZFZjdzSlhwT0NGK3BZU2NvcmVLSGpnMHozL1dDQ2dzeUpST1c4M1lDYWNu?= =?utf-8?B?emFwU3h5blJFQmo3VGp4N2R5dE5haHpRQjRSRXkyRzd3TGxEeFBWbE40K29J?= =?utf-8?B?NFNwdm9tRzU0QUh6dU83QXdUM2RPVm9hbnJ1MDZ2b1hWYlBuaDdNNDl3TlF4?= =?utf-8?B?TlgrckgvWFZqTzQ3czBORzhGeDNrT0JWTUltSHZtSkcyK3VRQlVubEI1YVk0?= =?utf-8?B?OEcramFnazJrZEtTTWlUbU16NUJTL2NTeURSZm9IOEdxMDVOd1VQK3YyOCsr?= =?utf-8?B?d0xKM1lXY0lRZCtRSHZxSVpPakVHRG95K3k2VFhlVngyWmxnSXRKSEtWSUoz?= =?utf-8?B?cTR1Z0ZDb0FwbVZHNDBJVmlHMk5idDU5N1JiOWtHcUppWkYrY1psOWFFQmp2?= =?utf-8?B?TSs5TFlRSzJqTlV4Y1Jpb3dteXFHbkNVa1IxRm1VRG83dXRjTytESHE1SkZH?= =?utf-8?B?OXRPR1VKOUhYVGV4c1dGem1DVDYxMVd4SWxzYnRXRXl6Qi9ja2wrZVJnSiti?= =?utf-8?B?QTRKNURITGtHQ0NVTElFSHFXSkJqSVI0K0VLMzRRekErRDcxdzhaaVdTamxL?= =?utf-8?B?Rk9tc1NKU1hOMm5PRkdpNHYxVG9OdWx1L2hqQnpsTWFIeHVhK25WQXY4ZWF0?= =?utf-8?B?bzF4ZzRGdGNYMTJzZEVFU1pab3FRLzRKOGlyenZiTHZBZFQ4UktkeGY4Znpt?= =?utf-8?B?bERCRUhwM09EQ050MDlMam9BYkxlQk91NW16K095TkJTblVWeWVjWXluNTF3?= =?utf-8?B?L21Nbnh5eWc1U0EyeWtpcXN3Q0I2aGkrclRzaERqSHlsenFPOEFCQndOc3Vp?= =?utf-8?B?NW82d1VJb1pENTV5akdzUlpwSHRCNlJrQTR4Q1NQN3RlY1Z4ci94SjU1M25S?= =?utf-8?B?eGM3TElMNklCNnlrUTQrT0tSbTk2ZTFTNzJsY2Q3cktDbHY3bXFGNHlBd0o1?= =?utf-8?B?bGs2cWVzN2pTUUovaEI3OGkrNG5pS0g4ZU9pK0ZEaWlRWkFraDY2SWxGS0Qv?= =?utf-8?B?NzFSeG1mcFE5WkdNYXJURjh6b3dUN252MW5BZ1l3d3haMENtVHd5LzdQTTBn?= =?utf-8?B?QjlYMlRHMUVuR3cyLzYzdlZ4SGFOOWpIaVhCQWs1T1NRODc4ZVdqMmM1Q3Z0?= =?utf-8?Q?sArylWtH+P1cDrKmGs=3D?= Content-Type: text/plain; charset="utf-8" Content-ID: <5FF28D33A5C7914D8479462BA157C132@namprd12.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MW2PR12MB4667.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 777e5a4f-a1f2-4c79-5cf4-08d983d000ee X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Sep 2021 05:06:03.9814 (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: 0fvCR/4ED2Ayi6HSchUtjcYuvhr9IO6JHd9fgplg1magDGfGHaOxut5ftTUJf+itmnK7p6phJvgkcwyjKdqkxA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR12MB1199 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org TG9nYW4sDQoNCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvbnZtZS9ob3N0L2NvcmUuYyBiL2RyaXZl cnMvbnZtZS9ob3N0L2NvcmUuYw0KPiBpbmRleCA3ZWZiMzFiODdmMzcuLjkxNjc1MGE1NGY2MCAx MDA2NDQNCj4gLS0tIGEvZHJpdmVycy9udm1lL2hvc3QvY29yZS5jDQo+ICsrKyBiL2RyaXZlcnMv bnZtZS9ob3N0L2NvcmUuYw0KPiBAQCAtMzc3MSw3ICszNzcxLDggQEAgc3RhdGljIHZvaWQgbnZt ZV9hbGxvY19ucyhzdHJ1Y3QgbnZtZV9jdHJsICpjdHJsLCB1bnNpZ25lZCBuc2lkLA0KPiAgICAg ICAgICAgICAgICAgIGJsa19xdWV1ZV9mbGFnX3NldChRVUVVRV9GTEFHX1NUQUJMRV9XUklURVMs IG5zLT5xdWV1ZSk7DQo+IA0KPiAgICAgICAgICBibGtfcXVldWVfZmxhZ19zZXQoUVVFVUVfRkxB R19OT05ST1QsIG5zLT5xdWV1ZSk7DQo+IC0gICAgICAgaWYgKGN0cmwtPm9wcy0+ZmxhZ3MgJiBO Vk1FX0ZfUENJX1AyUERNQSkNCj4gKyAgICAgICBpZiAoY3RybC0+b3BzLT5zdXBwb3J0c19wY2lf cDJwZG1hICYmDQo+ICsgICAgICAgICAgIGN0cmwtPm9wcy0+c3VwcG9ydHNfcGNpX3AycGRtYShj dHJsKSkNCj4gICAgICAgICAgICAgICAgICBibGtfcXVldWVfZmxhZ19zZXQoUVVFVUVfRkxBR19Q Q0lfUDJQRE1BLCBucy0+cXVldWUpOw0KPiANCj4gICAgICAgICAgbnMtPmN0cmwgPSBjdHJsOw0K PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9udm1lL2hvc3QvbnZtZS5oIGIvZHJpdmVycy9udm1lL2hv c3QvbnZtZS5oDQo+IGluZGV4IDk4NzFjMGM5Mzc0Yy4uZmI5YmZjNTJhNmQ3IDEwMDY0NA0KPiAt LS0gYS9kcml2ZXJzL252bWUvaG9zdC9udm1lLmgNCj4gKysrIGIvZHJpdmVycy9udm1lL2hvc3Qv bnZtZS5oDQo+IEBAIC00NzcsNyArNDc3LDYgQEAgc3RydWN0IG52bWVfY3RybF9vcHMgew0KPiAg ICAgICAgICB1bnNpZ25lZCBpbnQgZmxhZ3M7DQo+ICAgI2RlZmluZSBOVk1FX0ZfRkFCUklDUyAg ICAgICAgICAgICAgICAgKDEgPDwgMCkNCj4gICAjZGVmaW5lIE5WTUVfRl9NRVRBREFUQV9TVVBQ T1JURUQgICAgICAoMSA8PCAxKQ0KPiAtI2RlZmluZSBOVk1FX0ZfUENJX1AyUERNQSAgICAgICAg ICAgICAgKDEgPDwgMikNCj4gICAgICAgICAgaW50ICgqcmVnX3JlYWQzMikoc3RydWN0IG52bWVf Y3RybCAqY3RybCwgdTMyIG9mZiwgdTMyICp2YWwpOw0KPiAgICAgICAgICBpbnQgKCpyZWdfd3Jp dGUzMikoc3RydWN0IG52bWVfY3RybCAqY3RybCwgdTMyIG9mZiwgdTMyIHZhbCk7DQo+ICAgICAg ICAgIGludCAoKnJlZ19yZWFkNjQpKHN0cnVjdCBudm1lX2N0cmwgKmN0cmwsIHUzMiBvZmYsIHU2 NCAqdmFsKTsNCj4gQEAgLTQ4NSw2ICs0ODQsNyBAQCBzdHJ1Y3QgbnZtZV9jdHJsX29wcyB7DQo+ ICAgICAgICAgIHZvaWQgKCpzdWJtaXRfYXN5bmNfZXZlbnQpKHN0cnVjdCBudm1lX2N0cmwgKmN0 cmwpOw0KPiAgICAgICAgICB2b2lkICgqZGVsZXRlX2N0cmwpKHN0cnVjdCBudm1lX2N0cmwgKmN0 cmwpOw0KPiAgICAgICAgICBpbnQgKCpnZXRfYWRkcmVzcykoc3RydWN0IG52bWVfY3RybCAqY3Ry bCwgY2hhciAqYnVmLCBpbnQgc2l6ZSk7DQo+ICsgICAgICAgYm9vbCAoKnN1cHBvcnRzX3BjaV9w MnBkbWEpKHN0cnVjdCBudm1lX2N0cmwgKmN0cmwpOw0KPiAgIH07DQo+IA0KDQpJcyB0aGlzIG5l dyBvcHMgb25seSBuZWVkZWQgZm9yIHRoZSBQQ0llIHRyYW5zcG9ydCA/IG9yIGRvIHlvdSBoYXZl IA0KZm9sbG93aW5nIHBhdGNoZXMgdG8gdXNlIHRoaXMgb3AgZm9yIHRoZSBvdGhlciB0cmFuc3Bv cnRzID8NCg0KSWYgaXQgaXMgb25seSBuZWVkZWQgZm9yIHRoZSBQQ0llIHRoZW4gd2UgbmVlZCB0 byBmaW5kIGEgd2F5IHRvDQpub3QgYWRkIHRoaXMgc29tZWhvdy4uLg0KDQo=