From patchwork Mon Feb 7 17:22:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yishai Hadas X-Patchwork-Id: 12737761 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C45BC46467 for ; Mon, 7 Feb 2022 17:33:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1381809AbiBGRbO (ORCPT ); Mon, 7 Feb 2022 12:31:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44886 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241198AbiBGRXU (ORCPT ); Mon, 7 Feb 2022 12:23:20 -0500 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2050.outbound.protection.outlook.com [40.107.94.50]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E3E30C0401DB; Mon, 7 Feb 2022 09:23:18 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ecdwJD+HDvJ7C0P597O3hLtbytm5YvXlVLXjuDQmuweVn8YHuFdwzVcnHuSCHQsoM091yOwqqBXp4C4L8eNc80VOjLLdZhpGgShEnbtbww7LxbvC2OnhvVRXhaBVDWEWWRkYqNB/iVS9kUPVXUFfYamzLxorT3xCOucEAaoEwNxOn0eEOqXP5ejVaRAEYRGqR/rindbvc6HILESoclOyuQ/0JB2/I0ff/tE0mzL1qRMnn5/O55n7xE/K0fk8y6feCnG5SUSDNm/ca4vJZJC1X0w4ztA98s0Hb+iRaYa1dauQAJiLElY6Q3XXl40KHktlDIWYRFBXq2MDfCppFgfG+A== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=NultjMQVehi+CPwn9nKymN3VP3QKmVagd6D7Y7plSUE=; b=B+e096VrGIJr2UR7anjbmD2nPFnfPUxIhtWCQDGpDTxmNFZZHKranqjemFQQaQEW7rtHbYHYP7bUOUbNyhz8EMfLknblTPa1hglvydJMoQNoLIoN5tCikBKmhTINItqYF4Mq3CmNzTIqF0UR2DiY9IrVeZCN3gPX+Pz2LJaDREf1f+Pg34AOL0OSuwzYJrotMlru0XtMlkEoC8ILKnTUn8VwaLXwFzsdO0Bn5XPdNp6hwGDsEbmheAQaDZmI+hmL5ZvdPQSUudSaGKa3oHVMeKSGNMVaszlQ6CI5vfbiAkVjj/CFj8uBzWkO8h3TVslXLaKW0mKf/LGKSNn8AKSX3w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 12.22.5.238) smtp.rcpttodomain=intel.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); 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=NultjMQVehi+CPwn9nKymN3VP3QKmVagd6D7Y7plSUE=; b=Hd3yi9MZ1z3N/8lX0z9vE4LkcD2w1Z4h3WghM7CDrx0prbIsAxXuq9EVKr3ToWflpUyPEjGBrlN83pmwoNbpYdvZuanWH4PgkZcqtX15E4nl0J+qOCgfsRfc945hkvY3E5X8UojGu2MucsRAdRhmQfXhmUpwusyFyu/5VJrkcfvrufHYe5+bVWL5OEpoa3h3Fzksoo9WUhAIFLLHbjdUhycnrA4z3AYbFSrcDXGobsLV6NL0+TYYIJIoO97jzWy9QjN3BGFr4BYWHJ6RgDhw+MnetHt08Fb9r+D1AcfA7bv80oyg+DtiuGQ6AAwER39Um5IIRY5xrKpCThNHtmzxTA== Received: from MWHPR19CA0001.namprd19.prod.outlook.com (2603:10b6:300:d4::11) by DM5PR12MB1499.namprd12.prod.outlook.com (2603:10b6:4:8::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4951.11; Mon, 7 Feb 2022 17:23:10 +0000 Received: from CO1NAM11FT043.eop-nam11.prod.protection.outlook.com (2603:10b6:300:d4:cafe::43) by MWHPR19CA0001.outlook.office365.com (2603:10b6:300:d4::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4951.19 via Frontend Transport; Mon, 7 Feb 2022 17:23:10 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 12.22.5.238) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 12.22.5.238 as permitted sender) receiver=protection.outlook.com; client-ip=12.22.5.238; helo=mail.nvidia.com; Received: from mail.nvidia.com (12.22.5.238) by CO1NAM11FT043.mail.protection.outlook.com (10.13.174.193) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.4951.12 via Frontend Transport; Mon, 7 Feb 2022 17:23:10 +0000 Received: from rnnvmail205.nvidia.com (10.129.68.10) by DRHQMAIL105.nvidia.com (10.27.9.14) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Mon, 7 Feb 2022 17:23:09 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by rnnvmail205.nvidia.com (10.129.68.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.9; Mon, 7 Feb 2022 09:23:09 -0800 Received: from vdi.nvidia.com (10.127.8.10) by mail.nvidia.com (10.129.68.8) with Microsoft SMTP Server id 15.2.986.9 via Frontend Transport; Mon, 7 Feb 2022 09:23:05 -0800 From: Yishai Hadas To: , , , CC: , , , , , , , , , , , Subject: [PATCH V7 mlx5-next 01/15] PCI/IOV: Add pci_iov_vf_id() to get VF index Date: Mon, 7 Feb 2022 19:22:02 +0200 Message-ID: <20220207172216.206415-2-yishaih@nvidia.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20220207172216.206415-1-yishaih@nvidia.com> References: <20220207172216.206415-1-yishaih@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 3bc703b0-6974-4c41-8c96-08d9ea5e8391 X-MS-TrafficTypeDiagnostic: DM5PR12MB1499:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6790; 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:12.22.5.238;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230001)(4636009)(46966006)(36840700001)(40470700004)(110136005)(40460700003)(6636002)(6666004)(54906003)(508600001)(7696005)(316002)(4326008)(8676002)(8936002)(86362001)(70586007)(70206006)(36860700001)(82310400004)(356005)(47076005)(5660300002)(83380400001)(81166007)(1076003)(2616005)(26005)(336012)(426003)(186003)(36756003)(2906002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Feb 2022 17:23:10.3721 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3bc703b0-6974-4c41-8c96-08d9ea5e8391 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.238];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT043.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB1499 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Jason Gunthorpe The PCI core uses the VF index internally, often called the vf_id, during the setup of the VF, eg pci_iov_add_virtfn(). This index is needed for device drivers that implement live migration for their internal operations that configure/control their VFs. Specifically, mlx5_vfio_pci driver that is introduced in coming patches from this series needs it and not the bus/device/function which is exposed today. Add pci_iov_vf_id() which computes the vf_id by reversing the math that was used to create the bus/device/function. Signed-off-by: Jason Gunthorpe Acked-by: Bjorn Helgaas Signed-off-by: Leon Romanovsky Signed-off-by: Yishai Hadas --- drivers/pci/iov.c | 14 ++++++++++++++ include/linux/pci.h | 8 +++++++- 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 0267977c9f17..2e9f3d70803a 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -33,6 +33,20 @@ int pci_iov_virtfn_devfn(struct pci_dev *dev, int vf_id) } EXPORT_SYMBOL_GPL(pci_iov_virtfn_devfn); +int pci_iov_vf_id(struct pci_dev *dev) +{ + struct pci_dev *pf; + + if (!dev->is_virtfn) + return -EINVAL; + + pf = pci_physfn(dev); + return (((dev->bus->number << 8) + dev->devfn) - + ((pf->bus->number << 8) + pf->devfn + pf->sriov->offset)) / + pf->sriov->stride; +} +EXPORT_SYMBOL_GPL(pci_iov_vf_id); + /* * Per SR-IOV spec sec 3.3.10 and 3.3.11, First VF Offset and VF Stride may * change when NumVFs changes. diff --git a/include/linux/pci.h b/include/linux/pci.h index 8253a5413d7c..3d4ff7b35ad1 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2166,7 +2166,7 @@ void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar); #ifdef CONFIG_PCI_IOV int pci_iov_virtfn_bus(struct pci_dev *dev, int id); int pci_iov_virtfn_devfn(struct pci_dev *dev, int id); - +int pci_iov_vf_id(struct pci_dev *dev); int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn); void pci_disable_sriov(struct pci_dev *dev); @@ -2194,6 +2194,12 @@ static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id) { return -ENOSYS; } + +static inline int pci_iov_vf_id(struct pci_dev *dev) +{ + return -ENOSYS; +} + static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn) { return -ENODEV; }