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Wed, 9 Oct 2024 09:39:06 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , Subject: [PATCH v3 09/16] iommufd/viommu: Add vdev_to_dev helper Date: Wed, 9 Oct 2024 09:38:21 -0700 Message-ID: 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: DS3PEPF000099DD:EE_|IA1PR12MB6161:EE_ X-MS-Office365-Filtering-Correlation-Id: f4cdfb1d-4df3-4ceb-1662-08dce880e96c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|36860700013|1800799024|376014|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(7416014)(36860700013)(1800799024)(376014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2024 16:39:14.8150 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f4cdfb1d-4df3-4ceb-1662-08dce880e96c X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS3PEPF000099DD.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6161 This avoids a bigger trouble of moving the struct iommufd_device to the public header. Signed-off-by: Nicolin Chen Reviewed-by: Jason Gunthorpe --- include/linux/iommufd.h | 7 +++++++ drivers/iommu/iommufd/viommu_api.c | 7 +++++++ 2 files changed, 14 insertions(+) diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index e58b3e43aa7b..18d9b95f1cbc 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -85,6 +85,7 @@ struct iommufd_vdevice { struct iommufd_viommu *viommu; u64 id; /* per-vIOMMU virtual ID */ }; +struct device *vdev_to_dev(struct iommufd_vdevice *vdev); /** * struct iommufd_viommu_ops - vIOMMU specific operations @@ -134,6 +135,7 @@ __iommufd_viommu_alloc(struct iommufd_ctx *ictx, size_t size, const struct iommufd_viommu_ops *ops); struct iommufd_vdevice * __iommufd_vdevice_alloc(struct iommufd_ctx *ictx, size_t size); +struct device *vdev_to_dev(struct iommufd_vdevice *vdev); #else /* !CONFIG_IOMMUFD */ static inline struct iommufd_ctx *iommufd_ctx_from_file(struct file *file) { @@ -187,6 +189,11 @@ __iommufd_vdevice_alloc(struct iommufd_ctx *ictx, size_t size) { return ERR_PTR(-EOPNOTSUPP); } + +static inline struct device *vdev_to_dev(struct iommufd_vdevice *vdev) +{ + return NULL; +} #endif /* CONFIG_IOMMUFD */ /* diff --git a/drivers/iommu/iommufd/viommu_api.c b/drivers/iommu/iommufd/viommu_api.c index 8419df3b658c..281e85be520d 100644 --- a/drivers/iommu/iommufd/viommu_api.c +++ b/drivers/iommu/iommufd/viommu_api.c @@ -69,3 +69,10 @@ __iommufd_vdevice_alloc(struct iommufd_ctx *ictx, size_t size) return container_of(obj, struct iommufd_vdevice, obj); } EXPORT_SYMBOL_NS_GPL(__iommufd_vdevice_alloc, IOMMUFD); + +/* Caller should xa_lock(&viommu->vdevs) to protect the return value */ +struct device *vdev_to_dev(struct iommufd_vdevice *vdev) +{ + return vdev ? vdev->idev->dev : NULL; +} +EXPORT_SYMBOL_NS_GPL(vdev_to_dev, IOMMUFD);