1 // SPDX-License-Identifier: GPL-2.0
20 static int ffa_device_match(struct device *dev, struct device_driver *drv)  in ffa_device_match()  argument
25 	id_table = to_ffa_driver(drv)->id_table;  in ffa_device_match()
26 	ffa_dev = to_ffa_dev(dev);  in ffa_device_match()
28 	while (!uuid_is_null(&id_table->uuid)) {  in ffa_device_match()
30 		 * FF-A v1.0 doesn't provide discovery of UUIDs, just the  in ffa_device_match()
32 		 * id_table UUID and assign the UUID to the device if the  in ffa_device_match()
35 		if (uuid_is_null(&ffa_dev->uuid))  in ffa_device_match()
36 			ffa_device_match_uuid(ffa_dev, &id_table->uuid);  in ffa_device_match()
38 		if (uuid_equal(&ffa_dev->uuid, &id_table->uuid))  in ffa_device_match()
46 static int ffa_device_probe(struct device *dev)  in ffa_device_probe()  argument
48 	struct ffa_driver *ffa_drv = to_ffa_driver(dev->driver);  in ffa_device_probe()
49 	struct ffa_device *ffa_dev = to_ffa_dev(dev);  in ffa_device_probe()
51 	return ffa_drv->probe(ffa_dev);  in ffa_device_probe()
54 static void ffa_device_remove(struct device *dev)  in ffa_device_remove()  argument
56 	struct ffa_driver *ffa_drv = to_ffa_driver(dev->driver);  in ffa_device_remove()
58 	if (ffa_drv->remove)  in ffa_device_remove()
59 		ffa_drv->remove(to_ffa_dev(dev));  in ffa_device_remove()
62 static int ffa_device_uevent(const struct device *dev, struct kobj_uevent_env *env)  in ffa_device_uevent()  argument
64 	const struct ffa_device *ffa_dev = to_ffa_dev(dev);  in ffa_device_uevent()
67 			      ffa_dev->vm_id, &ffa_dev->uuid);  in ffa_device_uevent()
70 static ssize_t partition_id_show(struct device *dev,  in partition_id_show()  argument
73 	struct ffa_device *ffa_dev = to_ffa_dev(dev);  in partition_id_show()
75 	return sprintf(buf, "0x%04x\n", ffa_dev->vm_id);  in partition_id_show()
79 static ssize_t uuid_show(struct device *dev, struct device_attribute *attr,  in uuid_show()  argument
82 	struct ffa_device *ffa_dev = to_ffa_dev(dev);  in uuid_show()
84 	return sprintf(buf, "%pUb\n", &ffa_dev->uuid);  in uuid_show()
86 static DEVICE_ATTR_RO(uuid);
110 	if (!driver->probe)  in ffa_driver_register()
111 		return -EINVAL;  in ffa_driver_register()
113 	driver->driver.bus = &ffa_bus_type;  in ffa_driver_register()
114 	driver->driver.name = driver->name;  in ffa_driver_register()
115 	driver->driver.owner = owner;  in ffa_driver_register()
116 	driver->driver.mod_name = mod_name;  in ffa_driver_register()
118 	ret = driver_register(&driver->driver);  in ffa_driver_register()
120 		pr_debug("registered new ffa driver %s\n", driver->name);  in ffa_driver_register()
128 	driver_unregister(&driver->driver);  in ffa_driver_unregister()
132 static void ffa_release_device(struct device *dev)  in ffa_release_device()  argument
134 	struct ffa_device *ffa_dev = to_ffa_dev(dev);  in ffa_release_device()
136 	ida_free(&ffa_bus_id, ffa_dev->id);  in ffa_release_device()
140 static int __ffa_devices_unregister(struct device *dev, void *data)  in __ffa_devices_unregister()  argument
142 	device_unregister(dev);  in __ffa_devices_unregister()
156 	struct device *dev = NULL;  in ffa_device_is_valid()  local
160 		dev = bus_find_next_device(&ffa_bus_type, dev);  in ffa_device_is_valid()
161 		tmp_dev = to_ffa_dev(dev);  in ffa_device_is_valid()
166 		put_device(dev);  in ffa_device_is_valid()
167 	} while (dev);  in ffa_device_is_valid()
169 	put_device(dev);  in ffa_device_is_valid()
174 struct ffa_device *ffa_device_register(const uuid_t *uuid, int vm_id,  in ffa_device_register()  argument
178 	struct device *dev;  in ffa_device_register()  local
191 	dev = &ffa_dev->dev;  in ffa_device_register()
192 	dev->bus = &ffa_bus_type;  in ffa_device_register()
193 	dev->release = ffa_release_device;  in ffa_device_register()
194 	dev_set_name(&ffa_dev->dev, "arm-ffa-%d", id);  in ffa_device_register()
196 	ffa_dev->id = id;  in ffa_device_register()
197 	ffa_dev->vm_id = vm_id;  in ffa_device_register()
198 	ffa_dev->ops = ops;  in ffa_device_register()
199 	uuid_copy(&ffa_dev->uuid, uuid);  in ffa_device_register()
201 	ret = device_register(&ffa_dev->dev);  in ffa_device_register()
203 		dev_err(dev, "unable to register device %s err=%d\n",  in ffa_device_register()
204 			dev_name(dev), ret);  in ffa_device_register()
205 		put_device(dev);  in ffa_device_register()
218 	device_unregister(&ffa_dev->dev);  in ffa_device_unregister()