3  * IOMMU sysfs class support
10 #include <linux/iommu.h>
16  * As devices are added to the IOMMU, we'll add links to the group.
38 	.name = "iommu",
50  * Init the struct device for the IOMMU. IOMMU specific attributes can
52  * IOMMU type.
54 int iommu_device_sysfs_add(struct iommu_device *iommu,  in iommu_device_sysfs_add()  argument
62 	iommu->dev = kzalloc(sizeof(*iommu->dev), GFP_KERNEL);  in iommu_device_sysfs_add()
63 	if (!iommu->dev)  in iommu_device_sysfs_add()
66 	device_initialize(iommu->dev);  in iommu_device_sysfs_add()
68 	iommu->dev->class = &iommu_class;  in iommu_device_sysfs_add()
69 	iommu->dev->parent = parent;  in iommu_device_sysfs_add()
70 	iommu->dev->groups = groups;  in iommu_device_sysfs_add()
73 	ret = kobject_set_name_vargs(&iommu->dev->kobj, fmt, vargs);  in iommu_device_sysfs_add()
78 	ret = device_add(iommu->dev);  in iommu_device_sysfs_add()
82 	dev_set_drvdata(iommu->dev, iommu);  in iommu_device_sysfs_add()
87 	put_device(iommu->dev);  in iommu_device_sysfs_add()
92 void iommu_device_sysfs_remove(struct iommu_device *iommu)  in iommu_device_sysfs_remove()  argument
94 	dev_set_drvdata(iommu->dev, NULL);  in iommu_device_sysfs_remove()
95 	device_unregister(iommu->dev);  in iommu_device_sysfs_remove()
96 	iommu->dev = NULL;  in iommu_device_sysfs_remove()
101  * IOMMU drivers can indicate a device is managed by a given IOMMU using
103  * directory of the IOMMU device in sysfs and an "iommu" link will be
104  * created under the linked device, pointing back at the IOMMU device.
106 int iommu_device_link(struct iommu_device *iommu, struct device *link)  in iommu_device_link()  argument
110 	ret = sysfs_add_link_to_group(&iommu->dev->kobj, "devices",  in iommu_device_link()
115 	ret = sysfs_create_link_nowarn(&link->kobj, &iommu->dev->kobj, "iommu");  in iommu_device_link()
117 		sysfs_remove_link_from_group(&iommu->dev->kobj, "devices",  in iommu_device_link()
123 void iommu_device_unlink(struct iommu_device *iommu, struct device *link)  in iommu_device_unlink()  argument
125 	sysfs_remove_link(&link->kobj, "iommu");  in iommu_device_unlink()
126 	sysfs_remove_link_from_group(&iommu->dev->kobj, "devices", dev_name(link));  in iommu_device_unlink()