Commit | Line | Data |
---|---|---|
e5354107 SO |
1 | /* |
2 | * Intel Management Engine Interface (Intel MEI) Linux driver | |
3 | * Copyright (c) 2012-2013, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/kernel.h> | |
174cd4b1 | 19 | #include <linux/sched/signal.h> |
e5354107 SO |
20 | #include <linux/init.h> |
21 | #include <linux/errno.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mutex.h> | |
24 | #include <linux/interrupt.h> | |
e5354107 SO |
25 | #include <linux/mei_cl_bus.h> |
26 | ||
27 | #include "mei_dev.h" | |
3e833295 | 28 | #include "client.h" |
e5354107 SO |
29 | |
30 | #define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver) | |
31 | #define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev) | |
32 | ||
62382997 TW |
33 | /** |
34 | * __mei_cl_send - internal client send (write) | |
35 | * | |
36 | * @cl: host client | |
37 | * @buf: buffer to send | |
38 | * @length: buffer length | |
e0cb6b2f | 39 | * @mode: sending mode |
62382997 TW |
40 | * |
41 | * Return: written size bytes or < 0 on error | |
42 | */ | |
43 | ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, | |
e0cb6b2f | 44 | unsigned int mode) |
e5354107 | 45 | { |
62382997 | 46 | struct mei_device *bus; |
6cbb097f | 47 | struct mei_cl_cb *cb; |
62382997 | 48 | ssize_t rets; |
e5354107 | 49 | |
62382997 TW |
50 | if (WARN_ON(!cl || !cl->dev)) |
51 | return -ENODEV; | |
c93b76b3 | 52 | |
62382997 | 53 | bus = cl->dev; |
e5354107 | 54 | |
62382997 | 55 | mutex_lock(&bus->device_lock); |
15c13dfc AU |
56 | if (bus->dev_state != MEI_DEV_ENABLED) { |
57 | rets = -ENODEV; | |
58 | goto out; | |
59 | } | |
60 | ||
62382997 TW |
61 | if (!mei_cl_is_connected(cl)) { |
62 | rets = -ENODEV; | |
63 | goto out; | |
64 | } | |
e5354107 | 65 | |
62382997 TW |
66 | /* Check if we have an ME client device */ |
67 | if (!mei_me_cl_is_active(cl->me_cl)) { | |
68 | rets = -ENOTTY; | |
69 | goto out; | |
70 | } | |
c93b76b3 | 71 | |
62382997 TW |
72 | if (length > mei_cl_mtu(cl)) { |
73 | rets = -EFBIG; | |
74 | goto out; | |
75 | } | |
e5354107 | 76 | |
62382997 TW |
77 | cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, NULL); |
78 | if (!cb) { | |
79 | rets = -ENOMEM; | |
80 | goto out; | |
e5354107 SO |
81 | } |
82 | ||
e0cb6b2f AU |
83 | cb->internal = !!(mode & MEI_CL_IO_TX_INTERNAL); |
84 | cb->blocking = !!(mode & MEI_CL_IO_TX_BLOCKING); | |
62382997 TW |
85 | memcpy(cb->buf.data, buf, length); |
86 | ||
e0cb6b2f | 87 | rets = mei_cl_write(cl, cb); |
62382997 TW |
88 | |
89 | out: | |
90 | mutex_unlock(&bus->device_lock); | |
62382997 TW |
91 | |
92 | return rets; | |
e5354107 SO |
93 | } |
94 | ||
62382997 TW |
95 | /** |
96 | * __mei_cl_recv - internal client receive (read) | |
97 | * | |
98 | * @cl: host client | |
df7f5447 | 99 | * @buf: buffer to receive |
62382997 | 100 | * @length: buffer length |
076802d0 | 101 | * @mode: io mode |
62382997 TW |
102 | * |
103 | * Return: read size in bytes of < 0 on error | |
104 | */ | |
076802d0 AU |
105 | ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length, |
106 | unsigned int mode) | |
e5354107 | 107 | { |
62382997 TW |
108 | struct mei_device *bus; |
109 | struct mei_cl_cb *cb; | |
110 | size_t r_length; | |
111 | ssize_t rets; | |
076802d0 | 112 | bool nonblock = !!(mode & MEI_CL_IO_RX_NONBLOCK); |
e5354107 | 113 | |
62382997 | 114 | if (WARN_ON(!cl || !cl->dev)) |
e5354107 SO |
115 | return -ENODEV; |
116 | ||
62382997 | 117 | bus = cl->dev; |
e5354107 | 118 | |
62382997 | 119 | mutex_lock(&bus->device_lock); |
15c13dfc AU |
120 | if (bus->dev_state != MEI_DEV_ENABLED) { |
121 | rets = -ENODEV; | |
122 | goto out; | |
123 | } | |
e5354107 | 124 | |
62382997 TW |
125 | cb = mei_cl_read_cb(cl, NULL); |
126 | if (cb) | |
127 | goto copy; | |
e5354107 | 128 | |
62382997 TW |
129 | rets = mei_cl_read_start(cl, length, NULL); |
130 | if (rets && rets != -EBUSY) | |
131 | goto out; | |
e5354107 | 132 | |
076802d0 AU |
133 | if (nonblock) { |
134 | rets = -EAGAIN; | |
135 | goto out; | |
136 | } | |
137 | ||
62382997 | 138 | /* wait on event only if there is no other waiter */ |
1eb5bd4d AU |
139 | /* synchronized under device mutex */ |
140 | if (!waitqueue_active(&cl->rx_wait)) { | |
e5354107 | 141 | |
62382997 | 142 | mutex_unlock(&bus->device_lock); |
3e833295 | 143 | |
62382997 TW |
144 | if (wait_event_interruptible(cl->rx_wait, |
145 | (!list_empty(&cl->rd_completed)) || | |
146 | (!mei_cl_is_connected(cl)))) { | |
e5354107 | 147 | |
62382997 TW |
148 | if (signal_pending(current)) |
149 | return -EINTR; | |
150 | return -ERESTARTSYS; | |
151 | } | |
152 | ||
153 | mutex_lock(&bus->device_lock); | |
154 | ||
155 | if (!mei_cl_is_connected(cl)) { | |
2d4d5481 | 156 | rets = -ENODEV; |
62382997 TW |
157 | goto out; |
158 | } | |
e5354107 SO |
159 | } |
160 | ||
62382997 TW |
161 | cb = mei_cl_read_cb(cl, NULL); |
162 | if (!cb) { | |
163 | rets = 0; | |
164 | goto out; | |
165 | } | |
e5354107 | 166 | |
62382997 TW |
167 | copy: |
168 | if (cb->status) { | |
169 | rets = cb->status; | |
170 | goto free; | |
171 | } | |
007d64eb | 172 | |
62382997 TW |
173 | r_length = min_t(size_t, length, cb->buf_idx); |
174 | memcpy(buf, cb->buf.data, r_length); | |
175 | rets = r_length; | |
007d64eb | 176 | |
62382997 TW |
177 | free: |
178 | mei_io_cb_free(cb); | |
179 | out: | |
180 | mutex_unlock(&bus->device_lock); | |
181 | ||
182 | return rets; | |
007d64eb | 183 | } |
007d64eb | 184 | |
62382997 | 185 | /** |
d49dc5e7 | 186 | * mei_cldev_send - me device send (write) |
62382997 TW |
187 | * |
188 | * @cldev: me client device | |
189 | * @buf: buffer to send | |
190 | * @length: buffer length | |
191 | * | |
192 | * Return: written size in bytes or < 0 on error | |
193 | */ | |
d49dc5e7 | 194 | ssize_t mei_cldev_send(struct mei_cl_device *cldev, u8 *buf, size_t length) |
007d64eb | 195 | { |
62382997 | 196 | struct mei_cl *cl = cldev->cl; |
007d64eb | 197 | |
e0cb6b2f | 198 | return __mei_cl_send(cl, buf, length, MEI_CL_IO_TX_BLOCKING); |
007d64eb | 199 | } |
d49dc5e7 | 200 | EXPORT_SYMBOL_GPL(mei_cldev_send); |
007d64eb | 201 | |
076802d0 AU |
202 | /** |
203 | * mei_cldev_recv_nonblock - non block client receive (read) | |
204 | * | |
205 | * @cldev: me client device | |
206 | * @buf: buffer to receive | |
207 | * @length: buffer length | |
208 | * | |
209 | * Return: read size in bytes of < 0 on error | |
210 | * -EAGAIN if function will block. | |
211 | */ | |
212 | ssize_t mei_cldev_recv_nonblock(struct mei_cl_device *cldev, u8 *buf, | |
213 | size_t length) | |
214 | { | |
215 | struct mei_cl *cl = cldev->cl; | |
216 | ||
217 | return __mei_cl_recv(cl, buf, length, MEI_CL_IO_RX_NONBLOCK); | |
218 | } | |
219 | EXPORT_SYMBOL_GPL(mei_cldev_recv_nonblock); | |
220 | ||
62382997 | 221 | /** |
d49dc5e7 | 222 | * mei_cldev_recv - client receive (read) |
62382997 TW |
223 | * |
224 | * @cldev: me client device | |
df7f5447 | 225 | * @buf: buffer to receive |
62382997 TW |
226 | * @length: buffer length |
227 | * | |
228 | * Return: read size in bytes of < 0 on error | |
229 | */ | |
d49dc5e7 | 230 | ssize_t mei_cldev_recv(struct mei_cl_device *cldev, u8 *buf, size_t length) |
e5354107 | 231 | { |
62382997 | 232 | struct mei_cl *cl = cldev->cl; |
e5354107 | 233 | |
076802d0 | 234 | return __mei_cl_recv(cl, buf, length, 0); |
e5354107 | 235 | } |
d49dc5e7 | 236 | EXPORT_SYMBOL_GPL(mei_cldev_recv); |
e5354107 | 237 | |
62382997 | 238 | /** |
7c7a6077 | 239 | * mei_cl_bus_rx_work - dispatch rx event for a bus device |
62382997 TW |
240 | * |
241 | * @work: work | |
242 | */ | |
7c7a6077 | 243 | static void mei_cl_bus_rx_work(struct work_struct *work) |
e5354107 | 244 | { |
62382997 | 245 | struct mei_cl_device *cldev; |
bc46b45a | 246 | struct mei_device *bus; |
c93b76b3 | 247 | |
7c7a6077 | 248 | cldev = container_of(work, struct mei_cl_device, rx_work); |
007d64eb | 249 | |
bc46b45a AU |
250 | bus = cldev->bus; |
251 | ||
7c7a6077 AU |
252 | if (cldev->rx_cb) |
253 | cldev->rx_cb(cldev); | |
007d64eb | 254 | |
7c7a6077 AU |
255 | mutex_lock(&bus->device_lock); |
256 | mei_cl_read_start(cldev->cl, mei_cl_mtu(cldev->cl), NULL); | |
257 | mutex_unlock(&bus->device_lock); | |
258 | } | |
e5354107 | 259 | |
7c7a6077 AU |
260 | /** |
261 | * mei_cl_bus_notif_work - dispatch FW notif event for a bus device | |
262 | * | |
263 | * @work: work | |
264 | */ | |
265 | static void mei_cl_bus_notif_work(struct work_struct *work) | |
266 | { | |
267 | struct mei_cl_device *cldev; | |
268 | ||
269 | cldev = container_of(work, struct mei_cl_device, notif_work); | |
270 | ||
271 | if (cldev->notif_cb) | |
272 | cldev->notif_cb(cldev); | |
bb2ef9c3 AU |
273 | } |
274 | ||
275 | /** | |
276 | * mei_cl_bus_notify_event - schedule notify cb on bus client | |
277 | * | |
278 | * @cl: host client | |
850f8940 TW |
279 | * |
280 | * Return: true if event was scheduled | |
281 | * false if the client is not waiting for event | |
bb2ef9c3 | 282 | */ |
850f8940 | 283 | bool mei_cl_bus_notify_event(struct mei_cl *cl) |
bb2ef9c3 AU |
284 | { |
285 | struct mei_cl_device *cldev = cl->cldev; | |
286 | ||
7c7a6077 | 287 | if (!cldev || !cldev->notif_cb) |
850f8940 | 288 | return false; |
bb2ef9c3 AU |
289 | |
290 | if (!cl->notify_ev) | |
850f8940 | 291 | return false; |
bb2ef9c3 | 292 | |
7c7a6077 | 293 | schedule_work(&cldev->notif_work); |
bb2ef9c3 AU |
294 | |
295 | cl->notify_ev = false; | |
850f8940 TW |
296 | |
297 | return true; | |
e5354107 SO |
298 | } |
299 | ||
62382997 | 300 | /** |
7c7a6077 | 301 | * mei_cl_bus_rx_event - schedule rx event |
62382997 TW |
302 | * |
303 | * @cl: host client | |
a1f9ae2b TW |
304 | * |
305 | * Return: true if event was scheduled | |
306 | * false if the client is not waiting for event | |
62382997 | 307 | */ |
a1f9ae2b | 308 | bool mei_cl_bus_rx_event(struct mei_cl *cl) |
e5354107 | 309 | { |
62382997 | 310 | struct mei_cl_device *cldev = cl->cldev; |
d49ed64a | 311 | |
7c7a6077 | 312 | if (!cldev || !cldev->rx_cb) |
a1f9ae2b | 313 | return false; |
bb2ef9c3 | 314 | |
7c7a6077 | 315 | schedule_work(&cldev->rx_work); |
a1f9ae2b TW |
316 | |
317 | return true; | |
a7b71bc0 | 318 | } |
d49ed64a | 319 | |
62382997 | 320 | /** |
7c7a6077 | 321 | * mei_cldev_register_rx_cb - register Rx event callback |
62382997 TW |
322 | * |
323 | * @cldev: me client devices | |
7c7a6077 | 324 | * @rx_cb: callback function |
62382997 TW |
325 | * |
326 | * Return: 0 on success | |
327 | * -EALREADY if an callback is already registered | |
328 | * <0 on other errors | |
329 | */ | |
7c7a6077 | 330 | int mei_cldev_register_rx_cb(struct mei_cl_device *cldev, mei_cldev_cb_t rx_cb) |
e5354107 | 331 | { |
bc46b45a | 332 | struct mei_device *bus = cldev->bus; |
48168f45 TW |
333 | int ret; |
334 | ||
7c7a6077 AU |
335 | if (!rx_cb) |
336 | return -EINVAL; | |
337 | if (cldev->rx_cb) | |
62382997 | 338 | return -EALREADY; |
e5354107 | 339 | |
7c7a6077 AU |
340 | cldev->rx_cb = rx_cb; |
341 | INIT_WORK(&cldev->rx_work, mei_cl_bus_rx_work); | |
a7b71bc0 | 342 | |
7c7a6077 AU |
343 | mutex_lock(&bus->device_lock); |
344 | ret = mei_cl_read_start(cldev->cl, mei_cl_mtu(cldev->cl), NULL); | |
345 | mutex_unlock(&bus->device_lock); | |
346 | if (ret && ret != -EBUSY) | |
347 | return ret; | |
bb2ef9c3 | 348 | |
7c7a6077 AU |
349 | return 0; |
350 | } | |
351 | EXPORT_SYMBOL_GPL(mei_cldev_register_rx_cb); | |
352 | ||
353 | /** | |
354 | * mei_cldev_register_notif_cb - register FW notification event callback | |
355 | * | |
356 | * @cldev: me client devices | |
357 | * @notif_cb: callback function | |
358 | * | |
359 | * Return: 0 on success | |
360 | * -EALREADY if an callback is already registered | |
361 | * <0 on other errors | |
362 | */ | |
363 | int mei_cldev_register_notif_cb(struct mei_cl_device *cldev, | |
364 | mei_cldev_cb_t notif_cb) | |
365 | { | |
366 | struct mei_device *bus = cldev->bus; | |
367 | int ret; | |
368 | ||
369 | if (!notif_cb) | |
370 | return -EINVAL; | |
371 | ||
372 | if (cldev->notif_cb) | |
373 | return -EALREADY; | |
374 | ||
375 | cldev->notif_cb = notif_cb; | |
376 | INIT_WORK(&cldev->notif_work, mei_cl_bus_notif_work); | |
377 | ||
378 | mutex_lock(&bus->device_lock); | |
379 | ret = mei_cl_notify_request(cldev->cl, NULL, 1); | |
380 | mutex_unlock(&bus->device_lock); | |
381 | if (ret) | |
382 | return ret; | |
e5354107 | 383 | |
62382997 TW |
384 | return 0; |
385 | } | |
7c7a6077 | 386 | EXPORT_SYMBOL_GPL(mei_cldev_register_notif_cb); |
e5354107 | 387 | |
62382997 | 388 | /** |
d49dc5e7 | 389 | * mei_cldev_get_drvdata - driver data getter |
62382997 TW |
390 | * |
391 | * @cldev: mei client device | |
392 | * | |
393 | * Return: driver private data | |
394 | */ | |
d49dc5e7 | 395 | void *mei_cldev_get_drvdata(const struct mei_cl_device *cldev) |
62382997 TW |
396 | { |
397 | return dev_get_drvdata(&cldev->dev); | |
e5354107 | 398 | } |
d49dc5e7 | 399 | EXPORT_SYMBOL_GPL(mei_cldev_get_drvdata); |
e5354107 | 400 | |
62382997 | 401 | /** |
d49dc5e7 | 402 | * mei_cldev_set_drvdata - driver data setter |
62382997 TW |
403 | * |
404 | * @cldev: mei client device | |
405 | * @data: data to store | |
406 | */ | |
d49dc5e7 | 407 | void mei_cldev_set_drvdata(struct mei_cl_device *cldev, void *data) |
e5354107 | 408 | { |
62382997 | 409 | dev_set_drvdata(&cldev->dev, data); |
e5354107 | 410 | } |
d49dc5e7 | 411 | EXPORT_SYMBOL_GPL(mei_cldev_set_drvdata); |
333e4ee0 | 412 | |
baeacd03 TW |
413 | /** |
414 | * mei_cldev_uuid - return uuid of the underlying me client | |
415 | * | |
416 | * @cldev: mei client device | |
417 | * | |
418 | * Return: me client uuid | |
419 | */ | |
420 | const uuid_le *mei_cldev_uuid(const struct mei_cl_device *cldev) | |
421 | { | |
422 | return mei_me_cl_uuid(cldev->me_cl); | |
423 | } | |
424 | EXPORT_SYMBOL_GPL(mei_cldev_uuid); | |
425 | ||
426 | /** | |
427 | * mei_cldev_ver - return protocol version of the underlying me client | |
428 | * | |
429 | * @cldev: mei client device | |
430 | * | |
431 | * Return: me client protocol version | |
432 | */ | |
433 | u8 mei_cldev_ver(const struct mei_cl_device *cldev) | |
434 | { | |
435 | return mei_me_cl_ver(cldev->me_cl); | |
436 | } | |
437 | EXPORT_SYMBOL_GPL(mei_cldev_ver); | |
438 | ||
01a14ede TW |
439 | /** |
440 | * mei_cldev_enabled - check whether the device is enabled | |
441 | * | |
442 | * @cldev: mei client device | |
443 | * | |
444 | * Return: true if me client is initialized and connected | |
445 | */ | |
446 | bool mei_cldev_enabled(struct mei_cl_device *cldev) | |
447 | { | |
c110cdb1 | 448 | return mei_cl_is_connected(cldev->cl); |
01a14ede TW |
449 | } |
450 | EXPORT_SYMBOL_GPL(mei_cldev_enabled); | |
451 | ||
62382997 | 452 | /** |
5026c9cb | 453 | * mei_cldev_enable - enable me client device |
62382997 TW |
454 | * create connection with me client |
455 | * | |
456 | * @cldev: me client device | |
457 | * | |
458 | * Return: 0 on success and < 0 on error | |
459 | */ | |
d49dc5e7 | 460 | int mei_cldev_enable(struct mei_cl_device *cldev) |
333e4ee0 | 461 | { |
6009595a TW |
462 | struct mei_device *bus = cldev->bus; |
463 | struct mei_cl *cl; | |
464 | int ret; | |
333e4ee0 | 465 | |
6009595a | 466 | cl = cldev->cl; |
333e4ee0 | 467 | |
c110cdb1 | 468 | if (cl->state == MEI_FILE_UNINITIALIZED) { |
6009595a | 469 | mutex_lock(&bus->device_lock); |
c110cdb1 | 470 | ret = mei_cl_link(cl); |
6009595a | 471 | mutex_unlock(&bus->device_lock); |
c110cdb1 AU |
472 | if (ret) |
473 | return ret; | |
6009595a | 474 | /* update pointers */ |
6009595a TW |
475 | cl->cldev = cldev; |
476 | } | |
333e4ee0 | 477 | |
62382997 | 478 | mutex_lock(&bus->device_lock); |
62382997 | 479 | if (mei_cl_is_connected(cl)) { |
6009595a TW |
480 | ret = 0; |
481 | goto out; | |
62382997 | 482 | } |
333e4ee0 | 483 | |
6009595a TW |
484 | if (!mei_me_cl_is_active(cldev->me_cl)) { |
485 | dev_err(&cldev->dev, "me client is not active\n"); | |
486 | ret = -ENOTTY; | |
487 | goto out; | |
62382997 TW |
488 | } |
489 | ||
6009595a TW |
490 | ret = mei_cl_connect(cl, cldev->me_cl, NULL); |
491 | if (ret < 0) | |
492 | dev_err(&cldev->dev, "cannot connect\n"); | |
493 | ||
494 | out: | |
62382997 TW |
495 | mutex_unlock(&bus->device_lock); |
496 | ||
6009595a | 497 | return ret; |
333e4ee0 | 498 | } |
d49dc5e7 | 499 | EXPORT_SYMBOL_GPL(mei_cldev_enable); |
3e833295 | 500 | |
57080e88 AU |
501 | /** |
502 | * mei_cldev_unregister_callbacks - internal wrapper for unregistering | |
503 | * callbacks. | |
504 | * | |
505 | * @cldev: client device | |
506 | */ | |
507 | static void mei_cldev_unregister_callbacks(struct mei_cl_device *cldev) | |
508 | { | |
509 | if (cldev->rx_cb) { | |
510 | cancel_work_sync(&cldev->rx_work); | |
511 | cldev->rx_cb = NULL; | |
512 | } | |
513 | ||
514 | if (cldev->notif_cb) { | |
515 | cancel_work_sync(&cldev->notif_work); | |
516 | cldev->notif_cb = NULL; | |
517 | } | |
518 | } | |
519 | ||
62382997 | 520 | /** |
d49dc5e7 | 521 | * mei_cldev_disable - disable me client device |
62382997 TW |
522 | * disconnect form the me client |
523 | * | |
524 | * @cldev: me client device | |
525 | * | |
526 | * Return: 0 on success and < 0 on error | |
527 | */ | |
d49dc5e7 | 528 | int mei_cldev_disable(struct mei_cl_device *cldev) |
3e833295 | 529 | { |
b37719c3 | 530 | struct mei_device *bus; |
6009595a TW |
531 | struct mei_cl *cl; |
532 | int err; | |
3e833295 | 533 | |
c110cdb1 | 534 | if (!cldev) |
3e833295 SO |
535 | return -ENODEV; |
536 | ||
6009595a TW |
537 | cl = cldev->cl; |
538 | ||
539 | bus = cldev->bus; | |
4234a6de | 540 | |
57080e88 AU |
541 | mei_cldev_unregister_callbacks(cldev); |
542 | ||
62382997 | 543 | mutex_lock(&bus->device_lock); |
4234a6de | 544 | |
62382997 | 545 | if (!mei_cl_is_connected(cl)) { |
8d52af67 TW |
546 | dev_dbg(bus->dev, "Already disconnected\n"); |
547 | err = 0; | |
548 | goto out; | |
549 | } | |
550 | ||
62382997 | 551 | err = mei_cl_disconnect(cl); |
6009595a | 552 | if (err < 0) |
8d52af67 | 553 | dev_err(bus->dev, "Could not disconnect from the ME client\n"); |
3e833295 | 554 | |
6009595a | 555 | out: |
62382997 TW |
556 | /* Flush queues and remove any pending read */ |
557 | mei_cl_flush_queues(cl, NULL); | |
6009595a TW |
558 | mei_cl_unlink(cl); |
559 | ||
b37719c3 | 560 | mutex_unlock(&bus->device_lock); |
62382997 | 561 | return err; |
3e833295 | 562 | } |
d49dc5e7 | 563 | EXPORT_SYMBOL_GPL(mei_cldev_disable); |
3e833295 | 564 | |
5d882460 AU |
565 | /** |
566 | * mei_cl_bus_module_get - acquire module of the underlying | |
567 | * hw module. | |
568 | * | |
569 | * @cl: host client | |
570 | * | |
571 | * Return: true on success; false if the module was removed. | |
572 | */ | |
573 | bool mei_cl_bus_module_get(struct mei_cl *cl) | |
574 | { | |
575 | struct mei_cl_device *cldev = cl->cldev; | |
576 | ||
577 | if (!cldev) | |
578 | return true; | |
579 | ||
580 | return try_module_get(cldev->bus->dev->driver->owner); | |
581 | } | |
582 | ||
583 | /** | |
584 | * mei_cl_bus_module_put - release the underlying hw module. | |
585 | * | |
586 | * @cl: host client | |
587 | */ | |
588 | void mei_cl_bus_module_put(struct mei_cl *cl) | |
589 | { | |
590 | struct mei_cl_device *cldev = cl->cldev; | |
591 | ||
592 | if (cldev) | |
593 | module_put(cldev->bus->dev->driver->owner); | |
594 | } | |
595 | ||
688a9cce TW |
596 | /** |
597 | * mei_cl_device_find - find matching entry in the driver id table | |
598 | * | |
599 | * @cldev: me client device | |
600 | * @cldrv: me client driver | |
601 | * | |
602 | * Return: id on success; NULL if no id is matching | |
603 | */ | |
604 | static const | |
605 | struct mei_cl_device_id *mei_cl_device_find(struct mei_cl_device *cldev, | |
606 | struct mei_cl_driver *cldrv) | |
3e833295 | 607 | { |
62382997 TW |
608 | const struct mei_cl_device_id *id; |
609 | const uuid_le *uuid; | |
b26864ca TW |
610 | u8 version; |
611 | bool match; | |
3e833295 | 612 | |
62382997 | 613 | uuid = mei_me_cl_uuid(cldev->me_cl); |
b26864ca | 614 | version = mei_me_cl_ver(cldev->me_cl); |
3e833295 | 615 | |
62382997 | 616 | id = cldrv->id_table; |
62382997 | 617 | while (uuid_le_cmp(NULL_UUID_LE, id->uuid)) { |
62382997 | 618 | if (!uuid_le_cmp(*uuid, id->uuid)) { |
b26864ca | 619 | match = true; |
688a9cce | 620 | |
b26864ca TW |
621 | if (cldev->name[0]) |
622 | if (strncmp(cldev->name, id->name, | |
623 | sizeof(id->name))) | |
624 | match = false; | |
688a9cce | 625 | |
b26864ca TW |
626 | if (id->version != MEI_CL_VERSION_ANY) |
627 | if (id->version != version) | |
628 | match = false; | |
629 | if (match) | |
688a9cce | 630 | return id; |
62382997 | 631 | } |
e2b31644 | 632 | |
62382997 TW |
633 | id++; |
634 | } | |
3e833295 | 635 | |
688a9cce TW |
636 | return NULL; |
637 | } | |
638 | ||
639 | /** | |
640 | * mei_cl_device_match - device match function | |
641 | * | |
642 | * @dev: device | |
643 | * @drv: driver | |
644 | * | |
645 | * Return: 1 if matching device was found 0 otherwise | |
646 | */ | |
647 | static int mei_cl_device_match(struct device *dev, struct device_driver *drv) | |
648 | { | |
649 | struct mei_cl_device *cldev = to_mei_cl_device(dev); | |
650 | struct mei_cl_driver *cldrv = to_mei_cl_driver(drv); | |
651 | const struct mei_cl_device_id *found_id; | |
652 | ||
653 | if (!cldev) | |
654 | return 0; | |
655 | ||
71ce7891 TW |
656 | if (!cldev->do_match) |
657 | return 0; | |
658 | ||
688a9cce TW |
659 | if (!cldrv || !cldrv->id_table) |
660 | return 0; | |
661 | ||
662 | found_id = mei_cl_device_find(cldev, cldrv); | |
663 | if (found_id) | |
664 | return 1; | |
665 | ||
62382997 TW |
666 | return 0; |
667 | } | |
e2b31644 | 668 | |
feb8cd0f TW |
669 | /** |
670 | * mei_cl_device_probe - bus probe function | |
671 | * | |
672 | * @dev: device | |
673 | * | |
674 | * Return: 0 on success; < 0 otherwise | |
675 | */ | |
62382997 TW |
676 | static int mei_cl_device_probe(struct device *dev) |
677 | { | |
feb8cd0f | 678 | struct mei_cl_device *cldev; |
62382997 | 679 | struct mei_cl_driver *cldrv; |
feb8cd0f | 680 | const struct mei_cl_device_id *id; |
b9c79543 | 681 | int ret; |
feb8cd0f TW |
682 | |
683 | cldev = to_mei_cl_device(dev); | |
684 | cldrv = to_mei_cl_driver(dev->driver); | |
3e833295 | 685 | |
62382997 TW |
686 | if (!cldev) |
687 | return 0; | |
3e833295 | 688 | |
62382997 TW |
689 | if (!cldrv || !cldrv->probe) |
690 | return -ENODEV; | |
691 | ||
feb8cd0f TW |
692 | id = mei_cl_device_find(cldev, cldrv); |
693 | if (!id) | |
694 | return -ENODEV; | |
62382997 | 695 | |
b9c79543 AK |
696 | ret = cldrv->probe(cldev, id); |
697 | if (ret) | |
698 | return ret; | |
62382997 | 699 | |
b9c79543 AK |
700 | __module_get(THIS_MODULE); |
701 | return 0; | |
62382997 | 702 | } |
3e833295 | 703 | |
feb8cd0f TW |
704 | /** |
705 | * mei_cl_device_remove - remove device from the bus | |
706 | * | |
707 | * @dev: device | |
708 | * | |
709 | * Return: 0 on success; < 0 otherwise | |
710 | */ | |
62382997 TW |
711 | static int mei_cl_device_remove(struct device *dev) |
712 | { | |
713 | struct mei_cl_device *cldev = to_mei_cl_device(dev); | |
714 | struct mei_cl_driver *cldrv; | |
feb8cd0f | 715 | int ret = 0; |
3e833295 | 716 | |
62382997 TW |
717 | if (!cldev || !dev->driver) |
718 | return 0; | |
719 | ||
9ecb839f AU |
720 | cldrv = to_mei_cl_driver(dev->driver); |
721 | if (cldrv->remove) | |
722 | ret = cldrv->remove(cldev); | |
723 | ||
57080e88 | 724 | mei_cldev_unregister_callbacks(cldev); |
3d33ff24 | 725 | |
feb8cd0f TW |
726 | module_put(THIS_MODULE); |
727 | dev->driver = NULL; | |
728 | return ret; | |
3e833295 | 729 | |
3e833295 SO |
730 | } |
731 | ||
62382997 TW |
732 | static ssize_t name_show(struct device *dev, struct device_attribute *a, |
733 | char *buf) | |
3e833295 | 734 | { |
62382997 | 735 | struct mei_cl_device *cldev = to_mei_cl_device(dev); |
3e833295 | 736 | |
423de92f | 737 | return scnprintf(buf, PAGE_SIZE, "%s", cldev->name); |
3e833295 | 738 | } |
62382997 | 739 | static DEVICE_ATTR_RO(name); |
3e833295 | 740 | |
62382997 TW |
741 | static ssize_t uuid_show(struct device *dev, struct device_attribute *a, |
742 | char *buf) | |
3e833295 | 743 | { |
62382997 TW |
744 | struct mei_cl_device *cldev = to_mei_cl_device(dev); |
745 | const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl); | |
3e833295 | 746 | |
423de92f | 747 | return scnprintf(buf, PAGE_SIZE, "%pUl", uuid); |
3e833295 | 748 | } |
62382997 | 749 | static DEVICE_ATTR_RO(uuid); |
3e833295 | 750 | |
40b7320e TW |
751 | static ssize_t version_show(struct device *dev, struct device_attribute *a, |
752 | char *buf) | |
753 | { | |
754 | struct mei_cl_device *cldev = to_mei_cl_device(dev); | |
755 | u8 version = mei_me_cl_ver(cldev->me_cl); | |
40b7320e | 756 | |
423de92f | 757 | return scnprintf(buf, PAGE_SIZE, "%02X", version); |
40b7320e TW |
758 | } |
759 | static DEVICE_ATTR_RO(version); | |
760 | ||
62382997 TW |
761 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
762 | char *buf) | |
3e833295 | 763 | { |
62382997 TW |
764 | struct mei_cl_device *cldev = to_mei_cl_device(dev); |
765 | const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl); | |
6f9193ec | 766 | u8 version = mei_me_cl_ver(cldev->me_cl); |
3e833295 | 767 | |
6f9193ec PA |
768 | return scnprintf(buf, PAGE_SIZE, "mei:%s:%pUl:%02X:", |
769 | cldev->name, uuid, version); | |
3e833295 | 770 | } |
62382997 | 771 | static DEVICE_ATTR_RO(modalias); |
3e833295 | 772 | |
d49dc5e7 | 773 | static struct attribute *mei_cldev_attrs[] = { |
62382997 TW |
774 | &dev_attr_name.attr, |
775 | &dev_attr_uuid.attr, | |
40b7320e | 776 | &dev_attr_version.attr, |
62382997 TW |
777 | &dev_attr_modalias.attr, |
778 | NULL, | |
779 | }; | |
d49dc5e7 | 780 | ATTRIBUTE_GROUPS(mei_cldev); |
62382997 | 781 | |
38d3c00d TW |
782 | /** |
783 | * mei_cl_device_uevent - me client bus uevent handler | |
784 | * | |
785 | * @dev: device | |
786 | * @env: uevent kobject | |
787 | * | |
788 | * Return: 0 on success -ENOMEM on when add_uevent_var fails | |
789 | */ | |
790 | static int mei_cl_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
3e833295 | 791 | { |
62382997 TW |
792 | struct mei_cl_device *cldev = to_mei_cl_device(dev); |
793 | const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl); | |
40b7320e TW |
794 | u8 version = mei_me_cl_ver(cldev->me_cl); |
795 | ||
796 | if (add_uevent_var(env, "MEI_CL_VERSION=%d", version)) | |
797 | return -ENOMEM; | |
3e833295 | 798 | |
62382997 TW |
799 | if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid)) |
800 | return -ENOMEM; | |
3e833295 | 801 | |
62382997 TW |
802 | if (add_uevent_var(env, "MEI_CL_NAME=%s", cldev->name)) |
803 | return -ENOMEM; | |
804 | ||
b26864ca TW |
805 | if (add_uevent_var(env, "MODALIAS=mei:%s:%pUl:%02X:", |
806 | cldev->name, uuid, version)) | |
62382997 | 807 | return -ENOMEM; |
3e833295 SO |
808 | |
809 | return 0; | |
810 | } | |
cf3baefb | 811 | |
62382997 TW |
812 | static struct bus_type mei_cl_bus_type = { |
813 | .name = "mei", | |
d49dc5e7 | 814 | .dev_groups = mei_cldev_groups, |
62382997 TW |
815 | .match = mei_cl_device_match, |
816 | .probe = mei_cl_device_probe, | |
817 | .remove = mei_cl_device_remove, | |
38d3c00d | 818 | .uevent = mei_cl_device_uevent, |
62382997 TW |
819 | }; |
820 | ||
512f64d9 TW |
821 | static struct mei_device *mei_dev_bus_get(struct mei_device *bus) |
822 | { | |
823 | if (bus) | |
824 | get_device(bus->dev); | |
825 | ||
826 | return bus; | |
827 | } | |
828 | ||
829 | static void mei_dev_bus_put(struct mei_device *bus) | |
830 | { | |
831 | if (bus) | |
832 | put_device(bus->dev); | |
833 | } | |
834 | ||
ae48d74d | 835 | static void mei_cl_bus_dev_release(struct device *dev) |
aa6aef21 | 836 | { |
62382997 TW |
837 | struct mei_cl_device *cldev = to_mei_cl_device(dev); |
838 | ||
839 | if (!cldev) | |
840 | return; | |
841 | ||
842 | mei_me_cl_put(cldev->me_cl); | |
512f64d9 | 843 | mei_dev_bus_put(cldev->bus); |
c110cdb1 | 844 | kfree(cldev->cl); |
62382997 | 845 | kfree(cldev); |
aa6aef21 | 846 | } |
aa6aef21 | 847 | |
b8d01b7f | 848 | static const struct device_type mei_cl_device_type = { |
ae48d74d | 849 | .release = mei_cl_bus_dev_release, |
62382997 TW |
850 | }; |
851 | ||
213dd193 TW |
852 | /** |
853 | * mei_cl_bus_set_name - set device name for me client device | |
854 | * | |
855 | * @cldev: me client device | |
856 | */ | |
857 | static inline void mei_cl_bus_set_name(struct mei_cl_device *cldev) | |
858 | { | |
859 | dev_set_name(&cldev->dev, "mei:%s:%pUl:%02X", | |
860 | cldev->name, | |
861 | mei_me_cl_uuid(cldev->me_cl), | |
862 | mei_me_cl_ver(cldev->me_cl)); | |
863 | } | |
864 | ||
71ce7891 | 865 | /** |
ae48d74d | 866 | * mei_cl_bus_dev_alloc - initialize and allocate mei client device |
71ce7891 TW |
867 | * |
868 | * @bus: mei device | |
869 | * @me_cl: me client | |
870 | * | |
871 | * Return: allocated device structur or NULL on allocation failure | |
872 | */ | |
ae48d74d TW |
873 | static struct mei_cl_device *mei_cl_bus_dev_alloc(struct mei_device *bus, |
874 | struct mei_me_client *me_cl) | |
71ce7891 TW |
875 | { |
876 | struct mei_cl_device *cldev; | |
c110cdb1 | 877 | struct mei_cl *cl; |
71ce7891 TW |
878 | |
879 | cldev = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL); | |
880 | if (!cldev) | |
881 | return NULL; | |
882 | ||
c110cdb1 AU |
883 | cl = mei_cl_allocate(bus); |
884 | if (!cl) { | |
885 | kfree(cldev); | |
886 | return NULL; | |
887 | } | |
888 | ||
71ce7891 TW |
889 | device_initialize(&cldev->dev); |
890 | cldev->dev.parent = bus->dev; | |
891 | cldev->dev.bus = &mei_cl_bus_type; | |
892 | cldev->dev.type = &mei_cl_device_type; | |
893 | cldev->bus = mei_dev_bus_get(bus); | |
894 | cldev->me_cl = mei_me_cl_get(me_cl); | |
c110cdb1 | 895 | cldev->cl = cl; |
213dd193 | 896 | mei_cl_bus_set_name(cldev); |
71ce7891 TW |
897 | cldev->is_added = 0; |
898 | INIT_LIST_HEAD(&cldev->bus_list); | |
899 | ||
900 | return cldev; | |
901 | } | |
902 | ||
903 | /** | |
904 | * mei_cl_dev_setup - setup me client device | |
905 | * run fix up routines and set the device name | |
906 | * | |
907 | * @bus: mei device | |
908 | * @cldev: me client device | |
909 | * | |
910 | * Return: true if the device is eligible for enumeration | |
911 | */ | |
ae48d74d TW |
912 | static bool mei_cl_bus_dev_setup(struct mei_device *bus, |
913 | struct mei_cl_device *cldev) | |
71ce7891 TW |
914 | { |
915 | cldev->do_match = 1; | |
ae48d74d | 916 | mei_cl_bus_dev_fixup(cldev); |
71ce7891 | 917 | |
213dd193 | 918 | /* the device name can change during fix up */ |
71ce7891 | 919 | if (cldev->do_match) |
213dd193 | 920 | mei_cl_bus_set_name(cldev); |
71ce7891 TW |
921 | |
922 | return cldev->do_match == 1; | |
923 | } | |
924 | ||
925 | /** | |
926 | * mei_cl_bus_dev_add - add me client devices | |
927 | * | |
928 | * @cldev: me client device | |
929 | * | |
930 | * Return: 0 on success; < 0 on failre | |
931 | */ | |
932 | static int mei_cl_bus_dev_add(struct mei_cl_device *cldev) | |
933 | { | |
934 | int ret; | |
935 | ||
b26864ca TW |
936 | dev_dbg(cldev->bus->dev, "adding %pUL:%02X\n", |
937 | mei_me_cl_uuid(cldev->me_cl), | |
938 | mei_me_cl_ver(cldev->me_cl)); | |
71ce7891 TW |
939 | ret = device_add(&cldev->dev); |
940 | if (!ret) | |
941 | cldev->is_added = 1; | |
942 | ||
943 | return ret; | |
944 | } | |
945 | ||
6009595a TW |
946 | /** |
947 | * mei_cl_bus_dev_stop - stop the driver | |
948 | * | |
949 | * @cldev: me client device | |
950 | */ | |
951 | static void mei_cl_bus_dev_stop(struct mei_cl_device *cldev) | |
952 | { | |
953 | if (cldev->is_added) | |
954 | device_release_driver(&cldev->dev); | |
955 | } | |
956 | ||
957 | /** | |
958 | * mei_cl_bus_dev_destroy - destroy me client devices object | |
959 | * | |
960 | * @cldev: me client device | |
2da55cfd TW |
961 | * |
962 | * Locking: called under "dev->cl_bus_lock" lock | |
6009595a TW |
963 | */ |
964 | static void mei_cl_bus_dev_destroy(struct mei_cl_device *cldev) | |
965 | { | |
2da55cfd TW |
966 | |
967 | WARN_ON(!mutex_is_locked(&cldev->bus->cl_bus_lock)); | |
968 | ||
6009595a TW |
969 | if (!cldev->is_added) |
970 | return; | |
971 | ||
972 | device_del(&cldev->dev); | |
973 | ||
6009595a | 974 | list_del_init(&cldev->bus_list); |
6009595a TW |
975 | |
976 | cldev->is_added = 0; | |
977 | put_device(&cldev->dev); | |
978 | } | |
979 | ||
980 | /** | |
981 | * mei_cl_bus_remove_device - remove a devices form the bus | |
982 | * | |
983 | * @cldev: me client device | |
984 | */ | |
985 | static void mei_cl_bus_remove_device(struct mei_cl_device *cldev) | |
986 | { | |
987 | mei_cl_bus_dev_stop(cldev); | |
988 | mei_cl_bus_dev_destroy(cldev); | |
989 | } | |
990 | ||
991 | /** | |
992 | * mei_cl_bus_remove_devices - remove all devices form the bus | |
993 | * | |
994 | * @bus: mei device | |
995 | */ | |
996 | void mei_cl_bus_remove_devices(struct mei_device *bus) | |
997 | { | |
998 | struct mei_cl_device *cldev, *next; | |
999 | ||
2da55cfd | 1000 | mutex_lock(&bus->cl_bus_lock); |
6009595a TW |
1001 | list_for_each_entry_safe(cldev, next, &bus->device_list, bus_list) |
1002 | mei_cl_bus_remove_device(cldev); | |
2da55cfd | 1003 | mutex_unlock(&bus->cl_bus_lock); |
6009595a TW |
1004 | } |
1005 | ||
1006 | ||
1007 | /** | |
ae48d74d | 1008 | * mei_cl_bus_dev_init - allocate and initializes an mei client devices |
6009595a TW |
1009 | * based on me client |
1010 | * | |
1011 | * @bus: mei device | |
1012 | * @me_cl: me client | |
2da55cfd TW |
1013 | * |
1014 | * Locking: called under "dev->cl_bus_lock" lock | |
6009595a | 1015 | */ |
ae48d74d TW |
1016 | static void mei_cl_bus_dev_init(struct mei_device *bus, |
1017 | struct mei_me_client *me_cl) | |
e46980a1 | 1018 | { |
62382997 | 1019 | struct mei_cl_device *cldev; |
6009595a | 1020 | |
2da55cfd TW |
1021 | WARN_ON(!mutex_is_locked(&bus->cl_bus_lock)); |
1022 | ||
6009595a TW |
1023 | dev_dbg(bus->dev, "initializing %pUl", mei_me_cl_uuid(me_cl)); |
1024 | ||
1025 | if (me_cl->bus_added) | |
1026 | return; | |
e46980a1 | 1027 | |
ae48d74d | 1028 | cldev = mei_cl_bus_dev_alloc(bus, me_cl); |
62382997 | 1029 | if (!cldev) |
6009595a | 1030 | return; |
e46980a1 | 1031 | |
6009595a TW |
1032 | me_cl->bus_added = true; |
1033 | list_add_tail(&cldev->bus_list, &bus->device_list); | |
0c53357c | 1034 | |
6009595a | 1035 | } |
e46980a1 | 1036 | |
6009595a TW |
1037 | /** |
1038 | * mei_cl_bus_rescan - scan me clients list and add create | |
1039 | * devices for eligible clients | |
1040 | * | |
1041 | * @bus: mei device | |
1042 | */ | |
8bb2d27f | 1043 | static void mei_cl_bus_rescan(struct mei_device *bus) |
6009595a TW |
1044 | { |
1045 | struct mei_cl_device *cldev, *n; | |
1046 | struct mei_me_client *me_cl; | |
e46980a1 | 1047 | |
2da55cfd TW |
1048 | mutex_lock(&bus->cl_bus_lock); |
1049 | ||
6009595a TW |
1050 | down_read(&bus->me_clients_rwsem); |
1051 | list_for_each_entry(me_cl, &bus->me_clients, list) | |
ae48d74d | 1052 | mei_cl_bus_dev_init(bus, me_cl); |
6009595a | 1053 | up_read(&bus->me_clients_rwsem); |
e46980a1 | 1054 | |
6009595a | 1055 | list_for_each_entry_safe(cldev, n, &bus->device_list, bus_list) { |
e46980a1 | 1056 | |
6009595a TW |
1057 | if (!mei_me_cl_is_active(cldev->me_cl)) { |
1058 | mei_cl_bus_remove_device(cldev); | |
1059 | continue; | |
1060 | } | |
e46980a1 | 1061 | |
6009595a TW |
1062 | if (cldev->is_added) |
1063 | continue; | |
1064 | ||
ae48d74d | 1065 | if (mei_cl_bus_dev_setup(bus, cldev)) |
6009595a TW |
1066 | mei_cl_bus_dev_add(cldev); |
1067 | else { | |
1068 | list_del_init(&cldev->bus_list); | |
1069 | put_device(&cldev->dev); | |
1070 | } | |
1071 | } | |
1072 | mutex_unlock(&bus->cl_bus_lock); | |
1073 | ||
1074 | dev_dbg(bus->dev, "rescan end"); | |
62382997 | 1075 | } |
e46980a1 | 1076 | |
a816a00e AU |
1077 | void mei_cl_bus_rescan_work(struct work_struct *work) |
1078 | { | |
1079 | struct mei_device *bus = | |
1080 | container_of(work, struct mei_device, bus_rescan_work); | |
1081 | ||
1082 | mei_cl_bus_rescan(bus); | |
1083 | } | |
1084 | ||
d49dc5e7 TW |
1085 | int __mei_cldev_driver_register(struct mei_cl_driver *cldrv, |
1086 | struct module *owner) | |
62382997 TW |
1087 | { |
1088 | int err; | |
e46980a1 | 1089 | |
62382997 TW |
1090 | cldrv->driver.name = cldrv->name; |
1091 | cldrv->driver.owner = owner; | |
1092 | cldrv->driver.bus = &mei_cl_bus_type; | |
e46980a1 | 1093 | |
62382997 TW |
1094 | err = driver_register(&cldrv->driver); |
1095 | if (err) | |
1096 | return err; | |
e46980a1 | 1097 | |
62382997 | 1098 | pr_debug("mei: driver [%s] registered\n", cldrv->driver.name); |
e46980a1 | 1099 | |
62382997 | 1100 | return 0; |
e46980a1 | 1101 | } |
d49dc5e7 | 1102 | EXPORT_SYMBOL_GPL(__mei_cldev_driver_register); |
e46980a1 | 1103 | |
d49dc5e7 | 1104 | void mei_cldev_driver_unregister(struct mei_cl_driver *cldrv) |
cf3baefb | 1105 | { |
62382997 | 1106 | driver_unregister(&cldrv->driver); |
cf3baefb | 1107 | |
62382997 | 1108 | pr_debug("mei: driver [%s] unregistered\n", cldrv->driver.name); |
cf3baefb | 1109 | } |
d49dc5e7 | 1110 | EXPORT_SYMBOL_GPL(mei_cldev_driver_unregister); |
cf3baefb | 1111 | |
6009595a | 1112 | |
cf3baefb SO |
1113 | int __init mei_cl_bus_init(void) |
1114 | { | |
1115 | return bus_register(&mei_cl_bus_type); | |
1116 | } | |
1117 | ||
1118 | void __exit mei_cl_bus_exit(void) | |
1119 | { | |
1120 | bus_unregister(&mei_cl_bus_type); | |
1121 | } |