1 // SPDX-License-Identifier: GPL-2.0
3  * transport_class.c - implementation of generic transport classes
6  * Copyright (c) 2005 - James Bottomley <James.Bottomley@steeleye.com>
21  * transport class<-----attribute container<----class device
23  * Usually the attribute container is per-HBA, but the design doesn't
38  * transport_class_register - register an initial transport class
40  * @tclass:	a pointer to the transport class structure to be initialised
44  * zeros and then generic class must have been initialised with the
53 	return class_register(&tclass->class);  in transport_class_register()
58  * transport_class_unregister - unregister a previously registered class
67 	class_unregister(&tclass->class);  in transport_class_unregister()
80  * anon_transport_class_register - register an anonymous class
94 	atc->container.class = &atc->tclass.class;  in anon_transport_class_register()
95 	attribute_container_set_no_classdevs(&atc->container);  in anon_transport_class_register()
96 	error = attribute_container_register(&atc->container);  in anon_transport_class_register()
99 	atc->tclass.setup = anon_transport_dummy_function;  in anon_transport_class_register()
100 	atc->tclass.remove = anon_transport_dummy_function;  in anon_transport_class_register()
106  * anon_transport_class_unregister - unregister an anon class
115 	if (unlikely(attribute_container_unregister(&atc->container)))  in anon_transport_class_unregister()
124 	struct transport_class *tclass = class_to_transport_class(cont->class);  in transport_setup_classdev()
127 	if (tclass->setup)  in transport_setup_classdev()
128 		tclass->setup(tcont, dev, classdev);  in transport_setup_classdev()
134 …* transport_setup_device - declare a new dev for transport class association but don't make it vis…
158 	struct transport_class *tclass = class_to_transport_class(cont->class);  in transport_add_class_device()
166 	if (tcont->statistics) {  in transport_add_class_device()
167 		error = sysfs_create_group(&classdev->kobj, tcont->statistics);  in transport_add_class_device()
177 	if (tclass->remove)  in transport_add_class_device()
178 		tclass->remove(tcont, dev, classdev);  in transport_add_class_device()
185  * transport_add_device - declare a new dev for transport class association
206 	struct transport_class *tclass = class_to_transport_class(cont->class);  in transport_configure()
209 	if (tclass->configure)  in transport_configure()
210 		tclass->configure(tcont, dev, cdev);  in transport_configure()
216  * transport_configure_device - configure an already set up device
239 	struct transport_class *tclass = class_to_transport_class(cont->class);  in transport_remove_classdev()
241 	if (tclass->remove)  in transport_remove_classdev()
242 		tclass->remove(tcont, dev, classdev);  in transport_remove_classdev()
244 	if (tclass->remove != anon_transport_dummy_function) {  in transport_remove_classdev()
245 		if (tcont->statistics)  in transport_remove_classdev()
246 			sysfs_remove_group(&classdev->kobj, tcont->statistics);  in transport_remove_classdev()
255  * transport_remove_device - remove the visibility of a device
276 	struct transport_class *tclass = class_to_transport_class(cont->class);  in transport_destroy_classdev()
278 	if (tclass->remove != anon_transport_dummy_function)  in transport_destroy_classdev()
284  * transport_destroy_device - destroy a removed device
291  * last reference goes to zero.  Note also that the classdev retains a