@@ -184,6 +184,8 @@ static inline int iommufd_vfio_compat_set_no_iommu(struct iommufd_ctx *ictx)
struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx,
size_t size,
enum iommufd_object_type type);
+struct device *iommufd_viommu_find_dev(struct iommufd_viommu *viommu,
+ unsigned long vdev_id);
#else /* !CONFIG_IOMMUFD_DRIVER */
static inline struct iommufd_object *
_iommufd_object_alloc(struct iommufd_ctx *ictx, size_t size,
@@ -191,6 +193,12 @@ _iommufd_object_alloc(struct iommufd_ctx *ictx, size_t size,
{
return ERR_PTR(-EOPNOTSUPP);
}
+
+static inline struct device *
+iommufd_viommu_find_dev(struct iommufd_viommu *viommu, unsigned long vdev_id)
+{
+ return NULL;
+}
#endif /* CONFIG_IOMMUFD_DRIVER */
/*
@@ -36,3 +36,16 @@ struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx,
return ERR_PTR(rc);
}
EXPORT_SYMBOL_NS_GPL(_iommufd_object_alloc, IOMMUFD);
+
+/* Caller should xa_lock(&viommu->vdevs) to protect the return value */
+struct device *iommufd_viommu_find_dev(struct iommufd_viommu *viommu,
+ unsigned long vdev_id)
+{
+ struct iommufd_vdevice *vdev;
+
+ lockdep_is_held(&viommu->vdevs.xa_lock);
+
+ vdev = xa_load(&viommu->vdevs, vdev_id);
+ return vdev ? vdev->idev->dev : NULL;
+}
+EXPORT_SYMBOL_NS_GPL(iommufd_viommu_find_dev, IOMMUFD);
This avoids a bigger trouble of exposing struct iommufd_device and struct iommufd_vdevice in the public header. Signed-off-by: Nicolin Chen <nicolinc@nvidia.com> --- include/linux/iommufd.h | 8 ++++++++ drivers/iommu/iommufd/driver.c | 13 +++++++++++++ 2 files changed, 21 insertions(+)