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[v3,09/16] iommufd/viommu: Add vdev_to_dev helper

Message ID d5326ed6354a9f480a90b3557744ae0a7452c8bc.1728491532.git.nicolinc@nvidia.com (mailing list archive)
State New
Headers show
Series cover-letter: iommufd: Add vIOMMU infrastructure (Part-2: vDEVICE) | expand

Commit Message

Nicolin Chen Oct. 9, 2024, 4:38 p.m. UTC 
This avoids a bigger trouble of moving the struct iommufd_device to the
public header.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
---
 include/linux/iommufd.h            | 7 +++++++
 drivers/iommu/iommufd/viommu_api.c | 7 +++++++
 2 files changed, 14 insertions(+)

Comments

Jason Gunthorpe Oct. 17, 2024, 7:09 p.m. UTC | #1 
On Wed, Oct 09, 2024 at 09:38:21AM -0700, Nicolin Chen wrote:
> This avoids a bigger trouble of moving the struct iommufd_device to the
> public header.
> 
> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> ---
>  include/linux/iommufd.h            | 7 +++++++
>  drivers/iommu/iommufd/viommu_api.c | 7 +++++++
>  2 files changed, 14 insertions(+)

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

Jason
diff mbox series

Patch

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);