From patchwork Tue Aug 27 17:02:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolin Chen X-Patchwork-Id: 823333 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2070.outbound.protection.outlook.com [40.107.220.70]) (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 A8EA41D4142; Tue, 27 Aug 2024 17:02:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.220.70 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724778172; cv=fail; b=SC51pkKBvwWEdQByK7dty2abZiDM9ztCehRGv5nkaIX08VpJD+unOZgEg3NZtYpitMJOqBA7TT6pa4IvCaggdV7HjP20OVPS5aJ3nXHPAgD+RTi24Z/DjGDMQ/6yN9xy9GG2XpoA7AU0pNZ6v2WpctgQ5HWJE9+TDFeZ1C8TOs0= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724778172; c=relaxed/simple; bh=tn3OZnD55oCB4nvsOABWOGDJHPUP9Bbp/ZRBukOfSdc=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gzwdc4iTqJ57jgRWhb1l/93vjjQjltxLtI5KQRKv5Fdvy6Qn+yy94HTaTGQt5mhfR0HJbXwNXNbyLf2posR3X550RnUTc9X9r8ZFYneaRnrUkTznHU5a+KNDBa5X8KGMLYZ6Kpj+r/INiSG7yeVcg8MwHLR4ckFd/VdGjaY7uJM= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=VOTxo1T8; arc=fail smtp.client-ip=40.107.220.70 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="VOTxo1T8" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Jlk/AaLW33cWx8MwaKJSvcdYr8nz4rJ4qWIT2AlcIw3quU/aXbXU+dt8BLNzxsDWns4wL0Fu9WOB5j/GBPBxjQxnI8SplgMASNT2F6IP5NK8kAN2YtiM+NYuqomyL4k/0cCGsWsOkOA2YxW+1mViHRUcNs6MoI1CwEA4HHYlw/9Ub+2zuGVtkHkrJC6BtUgZZXyyj9fq+FzvsTEwp/J2TYRMVedtiuLH3A/QjV/ube/hWoyimmmTaMki0vY/VHrHpcyZykQh+iZfEvqjR/DJ6exVm3dL+F/ga4Y/sd3r9U+lgDP31l+yQuTy/ZeVtJcldJmB+bA+s5vLscDzSvILHw== 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=S7uJzBWU3ug9HE5spQDfc2A+knb9ed9B5xzddhVFhvw=; b=JxRp6h8mvZmVU3RUBV+iPe1bdzgD1DIVfM651pI2aBYfABS33Q5xIffbKb+mg3VqW1LENhR5mafqlkpAzHdcjDu8KDtkSkIE1cZW8txwJFb4ptlErGVtr21TzImz7+PJgNKnDmj6cLYbN+ETT8jQmYFiiq4tBZ0x8BRQ6VLG+9JD5FS8VZrJrMflJfdk6Q5JHZxzEREa4r5IBfysICI3BDHrHS5bk9xncIQ1eRNs0KarFmaJAXf9SWePvGL9kWzNymAJ5rKEkYLdi4npVXk4trfuvqq9yYpplGzB+Zqtgi863KT5GsmRxw49jVWpJ8I8fGpkrzvImQwXxtN0mo0s7A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.160) smtp.rcpttodomain=huawei.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 (0) 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=S7uJzBWU3ug9HE5spQDfc2A+knb9ed9B5xzddhVFhvw=; b=VOTxo1T8553etDr7d1k/LjNrvSThdNbcXuMHySpqW1ycfT7iG1rJqcrnKZrpNueO2doC8ZFJwoj2GG8dF+YJWabWkrbVvyBylFgJBqgTpEZq6kHMrrA7AI6L5CGhc6q8ygr3YAgaeTPR5mgIdzlGM2nUnRcPXuhkWUGceVFjsdUXO+wksw7scJVzvM/hZb52f9cSfMCa21yzikknIB9fVLmudxdqWZ7QzGrkYr5Dm+MjdRhavA5sZ2sJsy6WyzIdV3ocOChrJzfmH6cR48UcZuklwB5nmKtY7aCsedSWJBczL7ktsr0Jdf2UqqRmp6jZ8pdtpm+nutBeSEK5W1LwFg== Received: from DS7PR05CA0072.namprd05.prod.outlook.com (2603:10b6:8:57::7) by IA1PR12MB6387.namprd12.prod.outlook.com (2603:10b6:208:389::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7897.25; Tue, 27 Aug 2024 17:02:47 +0000 Received: from DS3PEPF000099D6.namprd04.prod.outlook.com (2603:10b6:8:57:cafe::a3) by DS7PR05CA0072.outlook.office365.com (2603:10b6:8:57::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7918.14 via Frontend Transport; Tue, 27 Aug 2024 17:02:46 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.117.160) 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 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.160) by DS3PEPF000099D6.mail.protection.outlook.com (10.167.17.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7918.13 via Frontend Transport; Tue, 27 Aug 2024 17:02:46 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Tue, 27 Aug 2024 10:02:29 -0700 Received: from rnnvmail201.nvidia.com (10.129.68.8) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Tue, 27 Aug 2024 10:02:29 -0700 Received: from Asurada-Nvidia.nvidia.com (10.127.8.13) by mail.nvidia.com (10.129.68.8) with Microsoft SMTP Server id 15.2.1544.4 via Frontend Transport; Tue, 27 Aug 2024 10:02:27 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , Subject: [PATCH v1 05/10] iommufd/viommu: Add iommufd_vdev_id_to_dev helper Date: Tue, 27 Aug 2024 10:02:07 -0700 Message-ID: <0079015047db9981c111f09414a863b644c038ef.1724777091.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS3PEPF000099D6:EE_|IA1PR12MB6387:EE_ X-MS-Office365-Filtering-Correlation-Id: 6c1c7aa8-3382-4c97-35b9-08dcc6ba1335 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|36860700013|376014|7416014|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge1.nvidia.com; CAT:NONE; SFS:(13230040)(1800799024)(36860700013)(376014)(7416014)(82310400026); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Aug 2024 17:02:46.6519 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6c1c7aa8-3382-4c97-35b9-08dcc6ba1335 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.160]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS3PEPF000099D6.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6387 This helps drivers to get the dev pointer held by the vdev_id structure. Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/viommu_api.c | 14 ++++++++++++++ include/linux/iommufd.h | 7 +++++++ 2 files changed, 21 insertions(+) diff --git a/drivers/iommu/iommufd/viommu_api.c b/drivers/iommu/iommufd/viommu_api.c index 3772a5892a6c..82eb33e047cf 100644 --- a/drivers/iommu/iommufd/viommu_api.c +++ b/drivers/iommu/iommufd/viommu_api.c @@ -51,3 +51,17 @@ iommufd_viommu_to_parent_domain(struct iommufd_viommu *viommu) return viommu->hwpt->common.domain; } EXPORT_SYMBOL_NS_GPL(iommufd_viommu_to_parent_domain, IOMMUFD); + +/* + * Fetch the dev pointer in the vdev_id structure. Caller must make ensure the + * lifecycle of the vdev_id structure, likely by adding a driver-level lock to + * protect the passed-in vdev_id for any race against a potential unset_vdev_id + * callback. + */ +struct device *iommufd_vdev_id_to_dev(struct iommufd_vdev_id *vdev_id) +{ + if (!vdev_id || !vdev_id->viommu) + return NULL; + return vdev_id->idev->dev; +} +EXPORT_SYMBOL_NS_GPL(iommufd_vdev_id_to_dev, IOMMUFD); diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index c89583c7c792..88d6586a424f 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -99,6 +99,7 @@ void iommufd_access_unpin_pages(struct iommufd_access *access, unsigned long iova, unsigned long length); int iommufd_access_rw(struct iommufd_access *access, unsigned long iova, void *data, size_t len, unsigned int flags); +struct device *iommufd_vdev_id_to_dev(struct iommufd_vdev_id *vdev_id); int iommufd_vfio_compat_ioas_get_id(struct iommufd_ctx *ictx, u32 *out_ioas_id); int iommufd_vfio_compat_ioas_create(struct iommufd_ctx *ictx); int iommufd_vfio_compat_set_no_iommu(struct iommufd_ctx *ictx); @@ -138,6 +139,12 @@ static inline int iommufd_access_rw(struct iommufd_access *access, unsigned long return -EOPNOTSUPP; } +static inline struct device * +iommufd_vdev_id_to_dev(struct iommufd_vdev_id *vdev_id) +{ + return NULL; +} + static inline int iommufd_vfio_compat_ioas_create(struct iommufd_ctx *ictx) { return -EOPNOTSUPP;