This avoids a bigger trouble of exposing struct iommufd_device and struct iommufd_vdevice in the public header.
Reviewed-by: Kevin Tian kevin.tian@intel.com Reviewed-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Nicolin Chen nicolinc@nvidia.com --- include/linux/iommufd.h | 8 ++++++++ drivers/iommu/iommufd/driver.c | 13 +++++++++++++ 2 files changed, 21 insertions(+)
diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 2bc735ff9511..11110c749200 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -185,6 +185,8 @@ 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_CORE */ static inline struct iommufd_object * _iommufd_object_alloc(struct iommufd_ctx *ictx, size_t size, @@ -192,6 +194,12 @@ _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_CORE */
/* diff --git a/drivers/iommu/iommufd/driver.c b/drivers/iommu/iommufd/driver.c index 2bc47d92a0ab..7b67fdf44134 100644 --- a/drivers/iommu/iommufd/driver.c +++ b/drivers/iommu/iommufd/driver.c @@ -36,5 +36,18 @@ struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx, } 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_assert_held(&viommu->vdevs.xa_lock); + + vdev = xa_load(&viommu->vdevs, vdev_id); + return vdev ? vdev->dev : NULL; +} +EXPORT_SYMBOL_NS_GPL(iommufd_viommu_find_dev, IOMMUFD); + MODULE_DESCRIPTION("iommufd code shared with builtin modules"); MODULE_LICENSE("GPL");