1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2012-2019, Intel Corporation. All rights reserved.
4 * Intel Management Engine Interface (Intel MEI) Linux driver
7 #include <linux/module.h>
8 #include <linux/device.h>
9 #include <linux/kernel.h>
10 #include <linux/sched/signal.h>
11 #include <linux/init.h>
12 #include <linux/errno.h>
13 #include <linux/slab.h>
14 #include <linux/mutex.h>
15 #include <linux/interrupt.h>
16 #include <linux/mei_cl_bus.h>
21 #define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver)
24 * __mei_cl_send - internal client send (write)
27 * @buf: buffer to send
28 * @length: buffer length
31 * Return: written size bytes or < 0 on error
33 ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
36 struct mei_device *bus;
40 if (WARN_ON(!cl || !cl->dev))
45 mutex_lock(&bus->device_lock);
46 if (bus->dev_state != MEI_DEV_ENABLED) {
51 if (!mei_cl_is_connected(cl)) {
56 /* Check if we have an ME client device */
57 if (!mei_me_cl_is_active(cl->me_cl)) {
62 if (length > mei_cl_mtu(cl)) {
67 while (cl->tx_cb_queued >= bus->tx_queue_limit) {
68 mutex_unlock(&bus->device_lock);
69 rets = wait_event_interruptible(cl->tx_wait,
70 cl->writing_state == MEI_WRITE_COMPLETE ||
71 (!mei_cl_is_connected(cl)));
72 mutex_lock(&bus->device_lock);
74 if (signal_pending(current))
78 if (!mei_cl_is_connected(cl)) {
84 cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, NULL);
90 cb->internal = !!(mode & MEI_CL_IO_TX_INTERNAL);
91 cb->blocking = !!(mode & MEI_CL_IO_TX_BLOCKING);
92 memcpy(cb->buf.data, buf, length);
94 rets = mei_cl_write(cl, cb);
97 mutex_unlock(&bus->device_lock);
103 * __mei_cl_recv - internal client receive (read)
106 * @buf: buffer to receive
107 * @length: buffer length
109 * @timeout: recv timeout, 0 for infinite timeout
111 * Return: read size in bytes of < 0 on error
113 ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length,
114 unsigned int mode, unsigned long timeout)
116 struct mei_device *bus;
117 struct mei_cl_cb *cb;
120 bool nonblock = !!(mode & MEI_CL_IO_RX_NONBLOCK);
122 if (WARN_ON(!cl || !cl->dev))
127 mutex_lock(&bus->device_lock);
128 if (bus->dev_state != MEI_DEV_ENABLED) {
133 cb = mei_cl_read_cb(cl, NULL);
137 rets = mei_cl_read_start(cl, length, NULL);
138 if (rets && rets != -EBUSY)
146 /* wait on event only if there is no other waiter */
147 /* synchronized under device mutex */
148 if (!waitqueue_active(&cl->rx_wait)) {
150 mutex_unlock(&bus->device_lock);
153 rets = wait_event_interruptible_timeout
155 (!list_empty(&cl->rd_completed)) ||
156 (!mei_cl_is_connected(cl)),
157 msecs_to_jiffies(timeout));
161 if (signal_pending(current))
166 if (wait_event_interruptible
168 (!list_empty(&cl->rd_completed)) ||
169 (!mei_cl_is_connected(cl)))) {
170 if (signal_pending(current))
176 mutex_lock(&bus->device_lock);
178 if (!mei_cl_is_connected(cl)) {
184 cb = mei_cl_read_cb(cl, NULL);
196 r_length = min_t(size_t, length, cb->buf_idx);
197 memcpy(buf, cb->buf.data, r_length);
203 mutex_unlock(&bus->device_lock);
209 * mei_cldev_send - me device send (write)
211 * @cldev: me client device
212 * @buf: buffer to send
213 * @length: buffer length
215 * Return: written size in bytes or < 0 on error
217 ssize_t mei_cldev_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
219 struct mei_cl *cl = cldev->cl;
221 return __mei_cl_send(cl, buf, length, MEI_CL_IO_TX_BLOCKING);
223 EXPORT_SYMBOL_GPL(mei_cldev_send);
226 * mei_cldev_recv_nonblock - non block client receive (read)
228 * @cldev: me client device
229 * @buf: buffer to receive
230 * @length: buffer length
232 * Return: read size in bytes of < 0 on error
233 * -EAGAIN if function will block.
235 ssize_t mei_cldev_recv_nonblock(struct mei_cl_device *cldev, u8 *buf,
238 struct mei_cl *cl = cldev->cl;
240 return __mei_cl_recv(cl, buf, length, MEI_CL_IO_RX_NONBLOCK, 0);
242 EXPORT_SYMBOL_GPL(mei_cldev_recv_nonblock);
245 * mei_cldev_recv - client receive (read)
247 * @cldev: me client device
248 * @buf: buffer to receive
249 * @length: buffer length
251 * Return: read size in bytes of < 0 on error
253 ssize_t mei_cldev_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
255 struct mei_cl *cl = cldev->cl;
257 return __mei_cl_recv(cl, buf, length, 0, 0);
259 EXPORT_SYMBOL_GPL(mei_cldev_recv);
262 * mei_cl_bus_rx_work - dispatch rx event for a bus device
266 static void mei_cl_bus_rx_work(struct work_struct *work)
268 struct mei_cl_device *cldev;
269 struct mei_device *bus;
271 cldev = container_of(work, struct mei_cl_device, rx_work);
278 mutex_lock(&bus->device_lock);
279 mei_cl_read_start(cldev->cl, mei_cl_mtu(cldev->cl), NULL);
280 mutex_unlock(&bus->device_lock);
284 * mei_cl_bus_notif_work - dispatch FW notif event for a bus device
288 static void mei_cl_bus_notif_work(struct work_struct *work)
290 struct mei_cl_device *cldev;
292 cldev = container_of(work, struct mei_cl_device, notif_work);
295 cldev->notif_cb(cldev);
299 * mei_cl_bus_notify_event - schedule notify cb on bus client
303 * Return: true if event was scheduled
304 * false if the client is not waiting for event
306 bool mei_cl_bus_notify_event(struct mei_cl *cl)
308 struct mei_cl_device *cldev = cl->cldev;
310 if (!cldev || !cldev->notif_cb)
316 schedule_work(&cldev->notif_work);
318 cl->notify_ev = false;
324 * mei_cl_bus_rx_event - schedule rx event
328 * Return: true if event was scheduled
329 * false if the client is not waiting for event
331 bool mei_cl_bus_rx_event(struct mei_cl *cl)
333 struct mei_cl_device *cldev = cl->cldev;
335 if (!cldev || !cldev->rx_cb)
338 schedule_work(&cldev->rx_work);
344 * mei_cldev_register_rx_cb - register Rx event callback
346 * @cldev: me client devices
347 * @rx_cb: callback function
349 * Return: 0 on success
350 * -EALREADY if an callback is already registered
353 int mei_cldev_register_rx_cb(struct mei_cl_device *cldev, mei_cldev_cb_t rx_cb)
355 struct mei_device *bus = cldev->bus;
363 cldev->rx_cb = rx_cb;
364 INIT_WORK(&cldev->rx_work, mei_cl_bus_rx_work);
366 mutex_lock(&bus->device_lock);
367 ret = mei_cl_read_start(cldev->cl, mei_cl_mtu(cldev->cl), NULL);
368 mutex_unlock(&bus->device_lock);
369 if (ret && ret != -EBUSY)
374 EXPORT_SYMBOL_GPL(mei_cldev_register_rx_cb);
377 * mei_cldev_register_notif_cb - register FW notification event callback
379 * @cldev: me client devices
380 * @notif_cb: callback function
382 * Return: 0 on success
383 * -EALREADY if an callback is already registered
386 int mei_cldev_register_notif_cb(struct mei_cl_device *cldev,
387 mei_cldev_cb_t notif_cb)
389 struct mei_device *bus = cldev->bus;
398 cldev->notif_cb = notif_cb;
399 INIT_WORK(&cldev->notif_work, mei_cl_bus_notif_work);
401 mutex_lock(&bus->device_lock);
402 ret = mei_cl_notify_request(cldev->cl, NULL, 1);
403 mutex_unlock(&bus->device_lock);
409 EXPORT_SYMBOL_GPL(mei_cldev_register_notif_cb);
412 * mei_cldev_get_drvdata - driver data getter
414 * @cldev: mei client device
416 * Return: driver private data
418 void *mei_cldev_get_drvdata(const struct mei_cl_device *cldev)
420 return dev_get_drvdata(&cldev->dev);
422 EXPORT_SYMBOL_GPL(mei_cldev_get_drvdata);
425 * mei_cldev_set_drvdata - driver data setter
427 * @cldev: mei client device
428 * @data: data to store
430 void mei_cldev_set_drvdata(struct mei_cl_device *cldev, void *data)
432 dev_set_drvdata(&cldev->dev, data);
434 EXPORT_SYMBOL_GPL(mei_cldev_set_drvdata);
437 * mei_cldev_uuid - return uuid of the underlying me client
439 * @cldev: mei client device
441 * Return: me client uuid
443 const uuid_le *mei_cldev_uuid(const struct mei_cl_device *cldev)
445 return mei_me_cl_uuid(cldev->me_cl);
447 EXPORT_SYMBOL_GPL(mei_cldev_uuid);
450 * mei_cldev_ver - return protocol version of the underlying me client
452 * @cldev: mei client device
454 * Return: me client protocol version
456 u8 mei_cldev_ver(const struct mei_cl_device *cldev)
458 return mei_me_cl_ver(cldev->me_cl);
460 EXPORT_SYMBOL_GPL(mei_cldev_ver);
463 * mei_cldev_enabled - check whether the device is enabled
465 * @cldev: mei client device
467 * Return: true if me client is initialized and connected
469 bool mei_cldev_enabled(struct mei_cl_device *cldev)
471 return mei_cl_is_connected(cldev->cl);
473 EXPORT_SYMBOL_GPL(mei_cldev_enabled);
476 * mei_cl_bus_module_get - acquire module of the underlying
479 * @cldev: mei client device
481 * Return: true on success; false if the module was removed.
483 static bool mei_cl_bus_module_get(struct mei_cl_device *cldev)
485 return try_module_get(cldev->bus->dev->driver->owner);
489 * mei_cl_bus_module_put - release the underlying hw module.
491 * @cldev: mei client device
493 static void mei_cl_bus_module_put(struct mei_cl_device *cldev)
495 module_put(cldev->bus->dev->driver->owner);
499 * mei_cldev_enable - enable me client device
500 * create connection with me client
502 * @cldev: me client device
504 * Return: 0 on success and < 0 on error
506 int mei_cldev_enable(struct mei_cl_device *cldev)
508 struct mei_device *bus = cldev->bus;
514 mutex_lock(&bus->device_lock);
515 if (cl->state == MEI_FILE_UNINITIALIZED) {
516 ret = mei_cl_link(cl);
519 /* update pointers */
523 if (mei_cl_is_connected(cl)) {
528 if (!mei_me_cl_is_active(cldev->me_cl)) {
529 dev_err(&cldev->dev, "me client is not active\n");
534 ret = mei_cl_connect(cl, cldev->me_cl, NULL);
536 dev_err(&cldev->dev, "cannot connect\n");
539 mutex_unlock(&bus->device_lock);
543 EXPORT_SYMBOL_GPL(mei_cldev_enable);
546 * mei_cldev_unregister_callbacks - internal wrapper for unregistering
549 * @cldev: client device
551 static void mei_cldev_unregister_callbacks(struct mei_cl_device *cldev)
554 cancel_work_sync(&cldev->rx_work);
558 if (cldev->notif_cb) {
559 cancel_work_sync(&cldev->notif_work);
560 cldev->notif_cb = NULL;
565 * mei_cldev_disable - disable me client device
566 * disconnect form the me client
568 * @cldev: me client device
570 * Return: 0 on success and < 0 on error
572 int mei_cldev_disable(struct mei_cl_device *cldev)
574 struct mei_device *bus;
585 mei_cldev_unregister_callbacks(cldev);
587 mutex_lock(&bus->device_lock);
589 if (!mei_cl_is_connected(cl)) {
590 dev_dbg(bus->dev, "Already disconnected\n");
595 err = mei_cl_disconnect(cl);
597 dev_err(bus->dev, "Could not disconnect from the ME client\n");
600 /* Flush queues and remove any pending read */
601 mei_cl_flush_queues(cl, NULL);
604 mutex_unlock(&bus->device_lock);
607 EXPORT_SYMBOL_GPL(mei_cldev_disable);
610 * mei_cl_device_find - find matching entry in the driver id table
612 * @cldev: me client device
613 * @cldrv: me client driver
615 * Return: id on success; NULL if no id is matching
618 struct mei_cl_device_id *mei_cl_device_find(struct mei_cl_device *cldev,
619 struct mei_cl_driver *cldrv)
621 const struct mei_cl_device_id *id;
626 uuid = mei_me_cl_uuid(cldev->me_cl);
627 version = mei_me_cl_ver(cldev->me_cl);
629 id = cldrv->id_table;
630 while (uuid_le_cmp(NULL_UUID_LE, id->uuid)) {
631 if (!uuid_le_cmp(*uuid, id->uuid)) {
635 if (strncmp(cldev->name, id->name,
639 if (id->version != MEI_CL_VERSION_ANY)
640 if (id->version != version)
653 * mei_cl_device_match - device match function
658 * Return: 1 if matching device was found 0 otherwise
660 static int mei_cl_device_match(struct device *dev, struct device_driver *drv)
662 struct mei_cl_device *cldev = to_mei_cl_device(dev);
663 struct mei_cl_driver *cldrv = to_mei_cl_driver(drv);
664 const struct mei_cl_device_id *found_id;
669 if (!cldev->do_match)
672 if (!cldrv || !cldrv->id_table)
675 found_id = mei_cl_device_find(cldev, cldrv);
683 * mei_cl_device_probe - bus probe function
687 * Return: 0 on success; < 0 otherwise
689 static int mei_cl_device_probe(struct device *dev)
691 struct mei_cl_device *cldev;
692 struct mei_cl_driver *cldrv;
693 const struct mei_cl_device_id *id;
696 cldev = to_mei_cl_device(dev);
697 cldrv = to_mei_cl_driver(dev->driver);
702 if (!cldrv || !cldrv->probe)
705 id = mei_cl_device_find(cldev, cldrv);
709 if (!mei_cl_bus_module_get(cldev)) {
710 dev_err(&cldev->dev, "get hw module failed");
714 ret = cldrv->probe(cldev, id);
716 mei_cl_bus_module_put(cldev);
720 __module_get(THIS_MODULE);
725 * mei_cl_device_remove - remove device from the bus
729 * Return: 0 on success; < 0 otherwise
731 static int mei_cl_device_remove(struct device *dev)
733 struct mei_cl_device *cldev = to_mei_cl_device(dev);
734 struct mei_cl_driver *cldrv;
737 if (!cldev || !dev->driver)
740 cldrv = to_mei_cl_driver(dev->driver);
742 ret = cldrv->remove(cldev);
744 mei_cldev_unregister_callbacks(cldev);
746 mei_cl_bus_module_put(cldev);
747 module_put(THIS_MODULE);
753 static ssize_t name_show(struct device *dev, struct device_attribute *a,
756 struct mei_cl_device *cldev = to_mei_cl_device(dev);
758 return scnprintf(buf, PAGE_SIZE, "%s", cldev->name);
760 static DEVICE_ATTR_RO(name);
762 static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
765 struct mei_cl_device *cldev = to_mei_cl_device(dev);
766 const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
768 return scnprintf(buf, PAGE_SIZE, "%pUl", uuid);
770 static DEVICE_ATTR_RO(uuid);
772 static ssize_t version_show(struct device *dev, struct device_attribute *a,
775 struct mei_cl_device *cldev = to_mei_cl_device(dev);
776 u8 version = mei_me_cl_ver(cldev->me_cl);
778 return scnprintf(buf, PAGE_SIZE, "%02X", version);
780 static DEVICE_ATTR_RO(version);
782 static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
785 struct mei_cl_device *cldev = to_mei_cl_device(dev);
786 const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
787 u8 version = mei_me_cl_ver(cldev->me_cl);
789 return scnprintf(buf, PAGE_SIZE, "mei:%s:%pUl:%02X:",
790 cldev->name, uuid, version);
792 static DEVICE_ATTR_RO(modalias);
794 static struct attribute *mei_cldev_attrs[] = {
797 &dev_attr_version.attr,
798 &dev_attr_modalias.attr,
801 ATTRIBUTE_GROUPS(mei_cldev);
804 * mei_cl_device_uevent - me client bus uevent handler
807 * @env: uevent kobject
809 * Return: 0 on success -ENOMEM on when add_uevent_var fails
811 static int mei_cl_device_uevent(struct device *dev, struct kobj_uevent_env *env)
813 struct mei_cl_device *cldev = to_mei_cl_device(dev);
814 const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
815 u8 version = mei_me_cl_ver(cldev->me_cl);
817 if (add_uevent_var(env, "MEI_CL_VERSION=%d", version))
820 if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid))
823 if (add_uevent_var(env, "MEI_CL_NAME=%s", cldev->name))
826 if (add_uevent_var(env, "MODALIAS=mei:%s:%pUl:%02X:",
827 cldev->name, uuid, version))
833 static struct bus_type mei_cl_bus_type = {
835 .dev_groups = mei_cldev_groups,
836 .match = mei_cl_device_match,
837 .probe = mei_cl_device_probe,
838 .remove = mei_cl_device_remove,
839 .uevent = mei_cl_device_uevent,
842 static struct mei_device *mei_dev_bus_get(struct mei_device *bus)
845 get_device(bus->dev);
850 static void mei_dev_bus_put(struct mei_device *bus)
853 put_device(bus->dev);
856 static void mei_cl_bus_dev_release(struct device *dev)
858 struct mei_cl_device *cldev = to_mei_cl_device(dev);
863 mei_me_cl_put(cldev->me_cl);
864 mei_dev_bus_put(cldev->bus);
865 mei_cl_unlink(cldev->cl);
870 static const struct device_type mei_cl_device_type = {
871 .release = mei_cl_bus_dev_release,
875 * mei_cl_bus_set_name - set device name for me client device
877 * @cldev: me client device
879 static inline void mei_cl_bus_set_name(struct mei_cl_device *cldev)
881 dev_set_name(&cldev->dev, "mei:%s:%pUl:%02X",
883 mei_me_cl_uuid(cldev->me_cl),
884 mei_me_cl_ver(cldev->me_cl));
888 * mei_cl_bus_dev_alloc - initialize and allocate mei client device
893 * Return: allocated device structur or NULL on allocation failure
895 static struct mei_cl_device *mei_cl_bus_dev_alloc(struct mei_device *bus,
896 struct mei_me_client *me_cl)
898 struct mei_cl_device *cldev;
901 cldev = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL);
905 cl = mei_cl_allocate(bus);
911 device_initialize(&cldev->dev);
912 cldev->dev.parent = bus->dev;
913 cldev->dev.bus = &mei_cl_bus_type;
914 cldev->dev.type = &mei_cl_device_type;
915 cldev->bus = mei_dev_bus_get(bus);
916 cldev->me_cl = mei_me_cl_get(me_cl);
918 mei_cl_bus_set_name(cldev);
920 INIT_LIST_HEAD(&cldev->bus_list);
926 * mei_cl_dev_setup - setup me client device
927 * run fix up routines and set the device name
930 * @cldev: me client device
932 * Return: true if the device is eligible for enumeration
934 static bool mei_cl_bus_dev_setup(struct mei_device *bus,
935 struct mei_cl_device *cldev)
938 mei_cl_bus_dev_fixup(cldev);
940 /* the device name can change during fix up */
942 mei_cl_bus_set_name(cldev);
944 return cldev->do_match == 1;
948 * mei_cl_bus_dev_add - add me client devices
950 * @cldev: me client device
952 * Return: 0 on success; < 0 on failre
954 static int mei_cl_bus_dev_add(struct mei_cl_device *cldev)
958 dev_dbg(cldev->bus->dev, "adding %pUL:%02X\n",
959 mei_me_cl_uuid(cldev->me_cl),
960 mei_me_cl_ver(cldev->me_cl));
961 ret = device_add(&cldev->dev);
969 * mei_cl_bus_dev_stop - stop the driver
971 * @cldev: me client device
973 static void mei_cl_bus_dev_stop(struct mei_cl_device *cldev)
976 device_release_driver(&cldev->dev);
980 * mei_cl_bus_dev_destroy - destroy me client devices object
982 * @cldev: me client device
984 * Locking: called under "dev->cl_bus_lock" lock
986 static void mei_cl_bus_dev_destroy(struct mei_cl_device *cldev)
989 WARN_ON(!mutex_is_locked(&cldev->bus->cl_bus_lock));
991 if (!cldev->is_added)
994 device_del(&cldev->dev);
996 list_del_init(&cldev->bus_list);
999 put_device(&cldev->dev);
1003 * mei_cl_bus_remove_device - remove a devices form the bus
1005 * @cldev: me client device
1007 static void mei_cl_bus_remove_device(struct mei_cl_device *cldev)
1009 mei_cl_bus_dev_stop(cldev);
1010 mei_cl_bus_dev_destroy(cldev);
1014 * mei_cl_bus_remove_devices - remove all devices form the bus
1018 void mei_cl_bus_remove_devices(struct mei_device *bus)
1020 struct mei_cl_device *cldev, *next;
1022 mutex_lock(&bus->cl_bus_lock);
1023 list_for_each_entry_safe(cldev, next, &bus->device_list, bus_list)
1024 mei_cl_bus_remove_device(cldev);
1025 mutex_unlock(&bus->cl_bus_lock);
1030 * mei_cl_bus_dev_init - allocate and initializes an mei client devices
1031 * based on me client
1036 * Locking: called under "dev->cl_bus_lock" lock
1038 static void mei_cl_bus_dev_init(struct mei_device *bus,
1039 struct mei_me_client *me_cl)
1041 struct mei_cl_device *cldev;
1043 WARN_ON(!mutex_is_locked(&bus->cl_bus_lock));
1045 dev_dbg(bus->dev, "initializing %pUl", mei_me_cl_uuid(me_cl));
1047 if (me_cl->bus_added)
1050 cldev = mei_cl_bus_dev_alloc(bus, me_cl);
1054 me_cl->bus_added = true;
1055 list_add_tail(&cldev->bus_list, &bus->device_list);
1060 * mei_cl_bus_rescan - scan me clients list and add create
1061 * devices for eligible clients
1065 static void mei_cl_bus_rescan(struct mei_device *bus)
1067 struct mei_cl_device *cldev, *n;
1068 struct mei_me_client *me_cl;
1070 mutex_lock(&bus->cl_bus_lock);
1072 down_read(&bus->me_clients_rwsem);
1073 list_for_each_entry(me_cl, &bus->me_clients, list)
1074 mei_cl_bus_dev_init(bus, me_cl);
1075 up_read(&bus->me_clients_rwsem);
1077 list_for_each_entry_safe(cldev, n, &bus->device_list, bus_list) {
1079 if (!mei_me_cl_is_active(cldev->me_cl)) {
1080 mei_cl_bus_remove_device(cldev);
1084 if (cldev->is_added)
1087 if (mei_cl_bus_dev_setup(bus, cldev))
1088 mei_cl_bus_dev_add(cldev);
1090 list_del_init(&cldev->bus_list);
1091 put_device(&cldev->dev);
1094 mutex_unlock(&bus->cl_bus_lock);
1096 dev_dbg(bus->dev, "rescan end");
1099 void mei_cl_bus_rescan_work(struct work_struct *work)
1101 struct mei_device *bus =
1102 container_of(work, struct mei_device, bus_rescan_work);
1104 mei_cl_bus_rescan(bus);
1107 int __mei_cldev_driver_register(struct mei_cl_driver *cldrv,
1108 struct module *owner)
1112 cldrv->driver.name = cldrv->name;
1113 cldrv->driver.owner = owner;
1114 cldrv->driver.bus = &mei_cl_bus_type;
1116 err = driver_register(&cldrv->driver);
1120 pr_debug("mei: driver [%s] registered\n", cldrv->driver.name);
1124 EXPORT_SYMBOL_GPL(__mei_cldev_driver_register);
1126 void mei_cldev_driver_unregister(struct mei_cl_driver *cldrv)
1128 driver_unregister(&cldrv->driver);
1130 pr_debug("mei: driver [%s] unregistered\n", cldrv->driver.name);
1132 EXPORT_SYMBOL_GPL(mei_cldev_driver_unregister);
1135 int __init mei_cl_bus_init(void)
1137 return bus_register(&mei_cl_bus_type);
1140 void __exit mei_cl_bus_exit(void)
1142 bus_unregister(&mei_cl_bus_type);