blob: c71cee8bd9577124730b0ec524045f582063a99d [file] [log] [blame]
Tomas Winkler9ca90502013-01-08 23:07:13 +02001/*
2 *
3 * Intel Management Engine Interface (Intel MEI) Linux driver
4 * Copyright (c) 2003-2012, Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 */
16
Tomas Winkler9ca90502013-01-08 23:07:13 +020017#include <linux/sched.h>
18#include <linux/wait.h>
19#include <linux/delay.h>
Tomas Winkler1f180352014-09-29 16:31:46 +030020#include <linux/slab.h>
Tomas Winkler04bb1392014-03-18 22:52:04 +020021#include <linux/pm_runtime.h>
Tomas Winkler9ca90502013-01-08 23:07:13 +020022
23#include <linux/mei.h>
24
25#include "mei_dev.h"
26#include "hbm.h"
Tomas Winkler90e0b5f2013-01-08 23:07:14 +020027#include "client.h"
28
29/**
Tomas Winkler79563db2015-01-11 00:07:16 +020030 * mei_me_cl_init - initialize me client
31 *
32 * @me_cl: me client
33 */
34void mei_me_cl_init(struct mei_me_client *me_cl)
35{
36 INIT_LIST_HEAD(&me_cl->list);
37 kref_init(&me_cl->refcnt);
38}
39
40/**
41 * mei_me_cl_get - increases me client refcount
42 *
43 * @me_cl: me client
44 *
45 * Locking: called under "dev->device_lock" lock
46 *
47 * Return: me client or NULL
48 */
49struct mei_me_client *mei_me_cl_get(struct mei_me_client *me_cl)
50{
Tomas Winklerb7d88512015-02-10 10:39:31 +020051 if (me_cl && kref_get_unless_zero(&me_cl->refcnt))
52 return me_cl;
Tomas Winkler79563db2015-01-11 00:07:16 +020053
Tomas Winklerb7d88512015-02-10 10:39:31 +020054 return NULL;
Tomas Winkler79563db2015-01-11 00:07:16 +020055}
56
57/**
Tomas Winklerb7d88512015-02-10 10:39:31 +020058 * mei_me_cl_release - free me client
Tomas Winkler79563db2015-01-11 00:07:16 +020059 *
60 * Locking: called under "dev->device_lock" lock
61 *
62 * @ref: me_client refcount
63 */
64static void mei_me_cl_release(struct kref *ref)
65{
66 struct mei_me_client *me_cl =
67 container_of(ref, struct mei_me_client, refcnt);
Tomas Winklerb7d88512015-02-10 10:39:31 +020068
Tomas Winkler79563db2015-01-11 00:07:16 +020069 kfree(me_cl);
70}
Tomas Winklerb7d88512015-02-10 10:39:31 +020071
Tomas Winkler79563db2015-01-11 00:07:16 +020072/**
73 * mei_me_cl_put - decrease me client refcount and free client if necessary
74 *
75 * Locking: called under "dev->device_lock" lock
76 *
77 * @me_cl: me client
78 */
79void mei_me_cl_put(struct mei_me_client *me_cl)
80{
81 if (me_cl)
82 kref_put(&me_cl->refcnt, mei_me_cl_release);
83}
84
85/**
Alexander Usyskind49ed642015-05-04 09:43:54 +030086 * __mei_me_cl_del - delete me client from the list and decrease
Tomas Winklerb7d88512015-02-10 10:39:31 +020087 * reference counter
88 *
89 * @dev: mei device
90 * @me_cl: me client
91 *
92 * Locking: dev->me_clients_rwsem
93 */
94static void __mei_me_cl_del(struct mei_device *dev, struct mei_me_client *me_cl)
95{
96 if (!me_cl)
97 return;
98
Alexander Usyskind49ed642015-05-04 09:43:54 +030099 list_del_init(&me_cl->list);
Tomas Winklerb7d88512015-02-10 10:39:31 +0200100 mei_me_cl_put(me_cl);
101}
102
103/**
Alexander Usyskind49ed642015-05-04 09:43:54 +0300104 * mei_me_cl_del - delete me client from the list and decrease
105 * reference counter
106 *
107 * @dev: mei device
108 * @me_cl: me client
109 */
110void mei_me_cl_del(struct mei_device *dev, struct mei_me_client *me_cl)
111{
112 down_write(&dev->me_clients_rwsem);
113 __mei_me_cl_del(dev, me_cl);
114 up_write(&dev->me_clients_rwsem);
115}
116
117/**
Tomas Winklerb7d88512015-02-10 10:39:31 +0200118 * mei_me_cl_add - add me client to the list
119 *
120 * @dev: mei device
121 * @me_cl: me client
122 */
123void mei_me_cl_add(struct mei_device *dev, struct mei_me_client *me_cl)
124{
125 down_write(&dev->me_clients_rwsem);
126 list_add(&me_cl->list, &dev->me_clients);
127 up_write(&dev->me_clients_rwsem);
128}
129
130/**
131 * __mei_me_cl_by_uuid - locate me client by uuid
132 * increases ref count
133 *
134 * @dev: mei device
135 * @uuid: me client uuid
136 *
137 * Return: me client or NULL if not found
138 *
139 * Locking: dev->me_clients_rwsem
140 */
141static struct mei_me_client *__mei_me_cl_by_uuid(struct mei_device *dev,
142 const uuid_le *uuid)
143{
144 struct mei_me_client *me_cl;
145 const uuid_le *pn;
146
147 WARN_ON(!rwsem_is_locked(&dev->me_clients_rwsem));
148
149 list_for_each_entry(me_cl, &dev->me_clients, list) {
150 pn = &me_cl->props.protocol_name;
151 if (uuid_le_cmp(*uuid, *pn) == 0)
152 return mei_me_cl_get(me_cl);
153 }
154
155 return NULL;
156}
157
158/**
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300159 * mei_me_cl_by_uuid - locate me client by uuid
Tomas Winkler79563db2015-01-11 00:07:16 +0200160 * increases ref count
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200161 *
162 * @dev: mei device
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300163 * @uuid: me client uuid
Alexander Usyskina27a76d2014-02-17 15:13:22 +0200164 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300165 * Return: me client or NULL if not found
Tomas Winklerb7d88512015-02-10 10:39:31 +0200166 *
167 * Locking: dev->me_clients_rwsem
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200168 */
Tomas Winklerb7d88512015-02-10 10:39:31 +0200169struct mei_me_client *mei_me_cl_by_uuid(struct mei_device *dev,
Tomas Winklerd3208322014-08-24 12:08:55 +0300170 const uuid_le *uuid)
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200171{
Tomas Winkler5ca2d382014-08-21 14:29:13 +0300172 struct mei_me_client *me_cl;
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200173
Tomas Winklerb7d88512015-02-10 10:39:31 +0200174 down_read(&dev->me_clients_rwsem);
175 me_cl = __mei_me_cl_by_uuid(dev, uuid);
176 up_read(&dev->me_clients_rwsem);
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200177
Tomas Winklerb7d88512015-02-10 10:39:31 +0200178 return me_cl;
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200179}
180
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200181/**
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300182 * mei_me_cl_by_id - locate me client by client id
Tomas Winkler79563db2015-01-11 00:07:16 +0200183 * increases ref count
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200184 *
185 * @dev: the device structure
186 * @client_id: me client id
187 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300188 * Return: me client or NULL if not found
Tomas Winklerb7d88512015-02-10 10:39:31 +0200189 *
190 * Locking: dev->me_clients_rwsem
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200191 */
Tomas Winklerd3208322014-08-24 12:08:55 +0300192struct mei_me_client *mei_me_cl_by_id(struct mei_device *dev, u8 client_id)
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200193{
Alexander Usyskina27a76d2014-02-17 15:13:22 +0200194
Tomas Winklerb7d88512015-02-10 10:39:31 +0200195 struct mei_me_client *__me_cl, *me_cl = NULL;
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200196
Tomas Winklerb7d88512015-02-10 10:39:31 +0200197 down_read(&dev->me_clients_rwsem);
198 list_for_each_entry(__me_cl, &dev->me_clients, list) {
199 if (__me_cl->client_id == client_id) {
200 me_cl = mei_me_cl_get(__me_cl);
201 break;
202 }
203 }
204 up_read(&dev->me_clients_rwsem);
205
206 return me_cl;
207}
208
209/**
210 * __mei_me_cl_by_uuid_id - locate me client by client id and uuid
211 * increases ref count
212 *
213 * @dev: the device structure
214 * @uuid: me client uuid
215 * @client_id: me client id
216 *
217 * Return: me client or null if not found
218 *
219 * Locking: dev->me_clients_rwsem
220 */
221static struct mei_me_client *__mei_me_cl_by_uuid_id(struct mei_device *dev,
222 const uuid_le *uuid, u8 client_id)
223{
224 struct mei_me_client *me_cl;
225 const uuid_le *pn;
226
227 WARN_ON(!rwsem_is_locked(&dev->me_clients_rwsem));
228
229 list_for_each_entry(me_cl, &dev->me_clients, list) {
230 pn = &me_cl->props.protocol_name;
231 if (uuid_le_cmp(*uuid, *pn) == 0 &&
232 me_cl->client_id == client_id)
Tomas Winkler79563db2015-01-11 00:07:16 +0200233 return mei_me_cl_get(me_cl);
Tomas Winklerb7d88512015-02-10 10:39:31 +0200234 }
Tomas Winkler79563db2015-01-11 00:07:16 +0200235
Tomas Winklerd3208322014-08-24 12:08:55 +0300236 return NULL;
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200237}
Tomas Winkler9ca90502013-01-08 23:07:13 +0200238
Tomas Winklerb7d88512015-02-10 10:39:31 +0200239
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300240/**
241 * mei_me_cl_by_uuid_id - locate me client by client id and uuid
Tomas Winkler79563db2015-01-11 00:07:16 +0200242 * increases ref count
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300243 *
244 * @dev: the device structure
245 * @uuid: me client uuid
246 * @client_id: me client id
247 *
Tomas Winklerb7d88512015-02-10 10:39:31 +0200248 * Return: me client or null if not found
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300249 */
Tomas Winklerd880f322014-08-21 14:29:15 +0300250struct mei_me_client *mei_me_cl_by_uuid_id(struct mei_device *dev,
251 const uuid_le *uuid, u8 client_id)
252{
253 struct mei_me_client *me_cl;
254
Tomas Winklerb7d88512015-02-10 10:39:31 +0200255 down_read(&dev->me_clients_rwsem);
256 me_cl = __mei_me_cl_by_uuid_id(dev, uuid, client_id);
257 up_read(&dev->me_clients_rwsem);
Tomas Winkler79563db2015-01-11 00:07:16 +0200258
Tomas Winklerb7d88512015-02-10 10:39:31 +0200259 return me_cl;
Tomas Winklerd880f322014-08-21 14:29:15 +0300260}
261
Tomas Winkler25ca6472014-08-21 14:29:14 +0300262/**
Tomas Winkler79563db2015-01-11 00:07:16 +0200263 * mei_me_cl_rm_by_uuid - remove all me clients matching uuid
Tomas Winkler25ca6472014-08-21 14:29:14 +0300264 *
265 * @dev: the device structure
266 * @uuid: me client uuid
Tomas Winkler79563db2015-01-11 00:07:16 +0200267 *
268 * Locking: called under "dev->device_lock" lock
Tomas Winkler25ca6472014-08-21 14:29:14 +0300269 */
Tomas Winkler79563db2015-01-11 00:07:16 +0200270void mei_me_cl_rm_by_uuid(struct mei_device *dev, const uuid_le *uuid)
Tomas Winkler25ca6472014-08-21 14:29:14 +0300271{
Tomas Winklerb7d88512015-02-10 10:39:31 +0200272 struct mei_me_client *me_cl;
Tomas Winkler25ca6472014-08-21 14:29:14 +0300273
Tomas Winkler79563db2015-01-11 00:07:16 +0200274 dev_dbg(dev->dev, "remove %pUl\n", uuid);
Tomas Winklerb7d88512015-02-10 10:39:31 +0200275
276 down_write(&dev->me_clients_rwsem);
277 me_cl = __mei_me_cl_by_uuid(dev, uuid);
278 __mei_me_cl_del(dev, me_cl);
279 up_write(&dev->me_clients_rwsem);
Tomas Winkler79563db2015-01-11 00:07:16 +0200280}
281
282/**
283 * mei_me_cl_rm_by_uuid_id - remove all me clients matching client id
284 *
285 * @dev: the device structure
286 * @uuid: me client uuid
287 * @id: me client id
288 *
289 * Locking: called under "dev->device_lock" lock
290 */
291void mei_me_cl_rm_by_uuid_id(struct mei_device *dev, const uuid_le *uuid, u8 id)
292{
Tomas Winklerb7d88512015-02-10 10:39:31 +0200293 struct mei_me_client *me_cl;
Tomas Winkler79563db2015-01-11 00:07:16 +0200294
295 dev_dbg(dev->dev, "remove %pUl %d\n", uuid, id);
Tomas Winklerb7d88512015-02-10 10:39:31 +0200296
297 down_write(&dev->me_clients_rwsem);
298 me_cl = __mei_me_cl_by_uuid_id(dev, uuid, id);
299 __mei_me_cl_del(dev, me_cl);
300 up_write(&dev->me_clients_rwsem);
Tomas Winkler25ca6472014-08-21 14:29:14 +0300301}
302
Tomas Winkler79563db2015-01-11 00:07:16 +0200303/**
304 * mei_me_cl_rm_all - remove all me clients
305 *
306 * @dev: the device structure
307 *
308 * Locking: called under "dev->device_lock" lock
309 */
310void mei_me_cl_rm_all(struct mei_device *dev)
311{
312 struct mei_me_client *me_cl, *next;
313
Tomas Winklerb7d88512015-02-10 10:39:31 +0200314 down_write(&dev->me_clients_rwsem);
Tomas Winkler79563db2015-01-11 00:07:16 +0200315 list_for_each_entry_safe(me_cl, next, &dev->me_clients, list)
Tomas Winklerb7d88512015-02-10 10:39:31 +0200316 __mei_me_cl_del(dev, me_cl);
317 up_write(&dev->me_clients_rwsem);
Tomas Winkler79563db2015-01-11 00:07:16 +0200318}
319
Tomas Winkler9ca90502013-01-08 23:07:13 +0200320/**
Tomas Winklercc99ecf2014-03-10 15:10:40 +0200321 * mei_cl_cmp_id - tells if the clients are the same
322 *
323 * @cl1: host client 1
324 * @cl2: host client 2
325 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300326 * Return: true - if the clients has same host and me ids
Tomas Winklercc99ecf2014-03-10 15:10:40 +0200327 * false - otherwise
328 */
329static inline bool mei_cl_cmp_id(const struct mei_cl *cl1,
330 const struct mei_cl *cl2)
331{
332 return cl1 && cl2 &&
333 (cl1->host_client_id == cl2->host_client_id) &&
Alexander Usyskind49ed642015-05-04 09:43:54 +0300334 (mei_cl_me_id(cl1) == mei_cl_me_id(cl2));
Tomas Winklercc99ecf2014-03-10 15:10:40 +0200335}
336
337/**
Tomas Winkler9ca90502013-01-08 23:07:13 +0200338 * mei_io_cb_free - free mei_cb_private related memory
339 *
340 * @cb: mei callback struct
341 */
342void mei_io_cb_free(struct mei_cl_cb *cb)
343{
344 if (cb == NULL)
345 return;
346
Tomas Winkler928fa662015-02-10 10:39:45 +0200347 list_del(&cb->list);
Tomas Winkler5db75142015-02-10 10:39:42 +0200348 kfree(cb->buf.data);
Tomas Winkler9ca90502013-01-08 23:07:13 +0200349 kfree(cb);
350}
351
352/**
353 * mei_io_cb_init - allocate and initialize io callback
354 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300355 * @cl: mei client
Tomas Winklerbca67d62015-02-10 10:39:43 +0200356 * @type: operation type
Masanari Iida393b1482013-04-05 01:05:05 +0900357 * @fp: pointer to file structure
Tomas Winkler9ca90502013-01-08 23:07:13 +0200358 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300359 * Return: mei_cl_cb pointer or NULL;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200360 */
Tomas Winkler3030dc02016-07-26 01:06:05 +0300361static struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl,
362 enum mei_cb_file_ops type,
363 const struct file *fp)
Tomas Winkler9ca90502013-01-08 23:07:13 +0200364{
365 struct mei_cl_cb *cb;
366
367 cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL);
368 if (!cb)
369 return NULL;
370
Tomas Winkler928fa662015-02-10 10:39:45 +0200371 INIT_LIST_HEAD(&cb->list);
Tomas Winkler62e8e6a2016-02-07 23:35:24 +0200372 cb->fp = fp;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200373 cb->cl = cl;
374 cb->buf_idx = 0;
Tomas Winklerbca67d62015-02-10 10:39:43 +0200375 cb->fop_type = type;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200376 return cb;
377}
378
379/**
Tomas Winkler928fa662015-02-10 10:39:45 +0200380 * __mei_io_list_flush - removes and frees cbs belonging to cl.
381 *
382 * @list: an instance of our list structure
383 * @cl: host client, can be NULL for flushing the whole list
384 * @free: whether to free the cbs
385 */
386static void __mei_io_list_flush(struct mei_cl_cb *list,
387 struct mei_cl *cl, bool free)
388{
389 struct mei_cl_cb *cb, *next;
390
391 /* enable removing everything if no cl is specified */
392 list_for_each_entry_safe(cb, next, &list->list, list) {
393 if (!cl || mei_cl_cmp_id(cl, cb->cl)) {
394 list_del_init(&cb->list);
395 if (free)
396 mei_io_cb_free(cb);
397 }
398 }
399}
400
401/**
402 * mei_io_list_flush - removes list entry belonging to cl.
403 *
404 * @list: An instance of our list structure
405 * @cl: host client
406 */
407void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl)
408{
409 __mei_io_list_flush(list, cl, false);
410}
411
412/**
413 * mei_io_list_free - removes cb belonging to cl and free them
414 *
415 * @list: An instance of our list structure
416 * @cl: host client
417 */
418static inline void mei_io_list_free(struct mei_cl_cb *list, struct mei_cl *cl)
419{
420 __mei_io_list_flush(list, cl, true);
421}
422
423/**
Tomas Winklerbca67d62015-02-10 10:39:43 +0200424 * mei_cl_alloc_cb - a convenient wrapper for allocating read cb
425 *
426 * @cl: host client
427 * @length: size of the buffer
Alexander Usyskin967b2742016-11-11 03:00:09 +0200428 * @fop_type: operation type
Tomas Winklerbca67d62015-02-10 10:39:43 +0200429 * @fp: associated file pointer (might be NULL)
430 *
431 * Return: cb on success and NULL on failure
432 */
433struct mei_cl_cb *mei_cl_alloc_cb(struct mei_cl *cl, size_t length,
Tomas Winkler3030dc02016-07-26 01:06:05 +0300434 enum mei_cb_file_ops fop_type,
Tomas Winklerf23e2cc2016-02-07 23:35:23 +0200435 const struct file *fp)
Tomas Winklerbca67d62015-02-10 10:39:43 +0200436{
437 struct mei_cl_cb *cb;
438
Tomas Winkler3030dc02016-07-26 01:06:05 +0300439 cb = mei_io_cb_init(cl, fop_type, fp);
Tomas Winklerbca67d62015-02-10 10:39:43 +0200440 if (!cb)
441 return NULL;
442
Alexander Usyskinaab3b1a2016-05-24 16:03:41 -0400443 if (length == 0)
444 return cb;
445
446 cb->buf.data = kmalloc(length, GFP_KERNEL);
447 if (!cb->buf.data) {
Tomas Winklerbca67d62015-02-10 10:39:43 +0200448 mei_io_cb_free(cb);
449 return NULL;
450 }
Alexander Usyskinaab3b1a2016-05-24 16:03:41 -0400451 cb->buf.size = length;
Tomas Winklerbca67d62015-02-10 10:39:43 +0200452
453 return cb;
454}
455
456/**
Tomas Winkler3030dc02016-07-26 01:06:05 +0300457 * mei_cl_enqueue_ctrl_wr_cb - a convenient wrapper for allocating
458 * and enqueuing of the control commands cb
459 *
460 * @cl: host client
461 * @length: size of the buffer
Alexander Usyskin967b2742016-11-11 03:00:09 +0200462 * @fop_type: operation type
Tomas Winkler3030dc02016-07-26 01:06:05 +0300463 * @fp: associated file pointer (might be NULL)
464 *
465 * Return: cb on success and NULL on failure
466 * Locking: called under "dev->device_lock" lock
467 */
468struct mei_cl_cb *mei_cl_enqueue_ctrl_wr_cb(struct mei_cl *cl, size_t length,
469 enum mei_cb_file_ops fop_type,
470 const struct file *fp)
471{
472 struct mei_cl_cb *cb;
473
474 /* for RX always allocate at least client's mtu */
475 if (length)
476 length = max_t(size_t, length, mei_cl_mtu(cl));
477
478 cb = mei_cl_alloc_cb(cl, length, fop_type, fp);
479 if (!cb)
480 return NULL;
481
482 list_add_tail(&cb->list, &cl->dev->ctrl_wr_list.list);
483 return cb;
484}
485
486/**
Tomas Winklera9bed612015-02-10 10:39:46 +0200487 * mei_cl_read_cb - find this cl's callback in the read list
488 * for a specific file
489 *
490 * @cl: host client
491 * @fp: file pointer (matching cb file object), may be NULL
492 *
493 * Return: cb on success, NULL if cb is not found
494 */
495struct mei_cl_cb *mei_cl_read_cb(const struct mei_cl *cl, const struct file *fp)
496{
497 struct mei_cl_cb *cb;
498
499 list_for_each_entry(cb, &cl->rd_completed, list)
Tomas Winkler62e8e6a2016-02-07 23:35:24 +0200500 if (!fp || fp == cb->fp)
Tomas Winklera9bed612015-02-10 10:39:46 +0200501 return cb;
502
503 return NULL;
504}
505
506/**
507 * mei_cl_read_cb_flush - free client's read pending and completed cbs
508 * for a specific file
509 *
510 * @cl: host client
511 * @fp: file pointer (matching cb file object), may be NULL
512 */
513void mei_cl_read_cb_flush(const struct mei_cl *cl, const struct file *fp)
514{
515 struct mei_cl_cb *cb, *next;
516
517 list_for_each_entry_safe(cb, next, &cl->rd_completed, list)
Tomas Winkler62e8e6a2016-02-07 23:35:24 +0200518 if (!fp || fp == cb->fp)
Tomas Winklera9bed612015-02-10 10:39:46 +0200519 mei_io_cb_free(cb);
520
521
522 list_for_each_entry_safe(cb, next, &cl->rd_pending, list)
Tomas Winkler62e8e6a2016-02-07 23:35:24 +0200523 if (!fp || fp == cb->fp)
Tomas Winklera9bed612015-02-10 10:39:46 +0200524 mei_io_cb_free(cb);
525}
526
527/**
Tomas Winkler9ca90502013-01-08 23:07:13 +0200528 * mei_cl_flush_queues - flushes queue lists belonging to cl.
529 *
Tomas Winkler9ca90502013-01-08 23:07:13 +0200530 * @cl: host client
Tomas Winklera9bed612015-02-10 10:39:46 +0200531 * @fp: file pointer (matching cb file object), may be NULL
Alexander Usyskince231392014-09-29 16:31:50 +0300532 *
533 * Return: 0 on success, -EINVAL if cl or cl->dev is NULL.
Tomas Winkler9ca90502013-01-08 23:07:13 +0200534 */
Tomas Winklera9bed612015-02-10 10:39:46 +0200535int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp)
Tomas Winkler9ca90502013-01-08 23:07:13 +0200536{
Alexander Usyskinc0abffb2013-09-15 18:11:07 +0300537 struct mei_device *dev;
538
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200539 if (WARN_ON(!cl || !cl->dev))
Tomas Winkler9ca90502013-01-08 23:07:13 +0200540 return -EINVAL;
541
Alexander Usyskinc0abffb2013-09-15 18:11:07 +0300542 dev = cl->dev;
543
544 cl_dbg(dev, cl, "remove list entry belonging to cl\n");
Tomas Winklercc99ecf2014-03-10 15:10:40 +0200545 mei_io_list_free(&cl->dev->write_list, cl);
546 mei_io_list_free(&cl->dev->write_waiting_list, cl);
Tomas Winkler9ca90502013-01-08 23:07:13 +0200547 mei_io_list_flush(&cl->dev->ctrl_wr_list, cl);
548 mei_io_list_flush(&cl->dev->ctrl_rd_list, cl);
549 mei_io_list_flush(&cl->dev->amthif_cmd_list, cl);
Tomas Winklera9bed612015-02-10 10:39:46 +0200550
551 mei_cl_read_cb_flush(cl, fp);
552
Tomas Winkler9ca90502013-01-08 23:07:13 +0200553 return 0;
554}
555
Tomas Winkler9ca90502013-01-08 23:07:13 +0200556
557/**
Alexander Usyskin83ce0742014-01-08 22:31:46 +0200558 * mei_cl_init - initializes cl.
Tomas Winkler9ca90502013-01-08 23:07:13 +0200559 *
560 * @cl: host client to be initialized
561 * @dev: mei device
562 */
563void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
564{
565 memset(cl, 0, sizeof(struct mei_cl));
566 init_waitqueue_head(&cl->wait);
567 init_waitqueue_head(&cl->rx_wait);
568 init_waitqueue_head(&cl->tx_wait);
Tomas Winklerb38a3622015-07-26 09:54:19 +0300569 init_waitqueue_head(&cl->ev_wait);
Tomas Winklera9bed612015-02-10 10:39:46 +0200570 INIT_LIST_HEAD(&cl->rd_completed);
571 INIT_LIST_HEAD(&cl->rd_pending);
Tomas Winkler9ca90502013-01-08 23:07:13 +0200572 INIT_LIST_HEAD(&cl->link);
Tomas Winkler9ca90502013-01-08 23:07:13 +0200573 cl->writing_state = MEI_IDLE;
Tomas Winkler3c666182015-05-04 09:43:52 +0300574 cl->state = MEI_FILE_INITIALIZING;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200575 cl->dev = dev;
576}
577
578/**
579 * mei_cl_allocate - allocates cl structure and sets it up.
580 *
581 * @dev: mei device
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300582 * Return: The allocated file or NULL on failure
Tomas Winkler9ca90502013-01-08 23:07:13 +0200583 */
584struct mei_cl *mei_cl_allocate(struct mei_device *dev)
585{
586 struct mei_cl *cl;
587
588 cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL);
589 if (!cl)
590 return NULL;
591
592 mei_cl_init(cl, dev);
593
594 return cl;
595}
596
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200597/**
Alexander Usyskin3908be62015-02-10 10:39:35 +0200598 * mei_cl_link - allocate host id in the host map
Tomas Winkler9ca90502013-01-08 23:07:13 +0200599 *
Alexander Usyskin3908be62015-02-10 10:39:35 +0200600 * @cl: host client
Masanari Iida393b1482013-04-05 01:05:05 +0900601 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300602 * Return: 0 on success
Tomas Winkler9ca90502013-01-08 23:07:13 +0200603 * -EINVAL on incorrect values
Tomas Winkler03b8d342015-02-10 10:39:44 +0200604 * -EMFILE if open count exceeded.
Tomas Winkler9ca90502013-01-08 23:07:13 +0200605 */
Alexander Usyskin7851e002016-02-07 23:35:40 +0200606int mei_cl_link(struct mei_cl *cl)
Tomas Winkler9ca90502013-01-08 23:07:13 +0200607{
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200608 struct mei_device *dev;
Tomas Winkler22f96a02013-09-16 23:44:47 +0300609 long open_handle_count;
Alexander Usyskin7851e002016-02-07 23:35:40 +0200610 int id;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200611
Tomas Winkler781d0d82013-01-08 23:07:22 +0200612 if (WARN_ON(!cl || !cl->dev))
Tomas Winkler9ca90502013-01-08 23:07:13 +0200613 return -EINVAL;
614
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200615 dev = cl->dev;
616
Alexander Usyskin7851e002016-02-07 23:35:40 +0200617 id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX);
Tomas Winkler781d0d82013-01-08 23:07:22 +0200618 if (id >= MEI_CLIENTS_MAX) {
Tomas Winkler2bf94cab2014-09-29 16:31:42 +0300619 dev_err(dev->dev, "id exceeded %d", MEI_CLIENTS_MAX);
Tomas Winklere036cc52013-09-16 23:44:46 +0300620 return -EMFILE;
621 }
622
Tomas Winkler22f96a02013-09-16 23:44:47 +0300623 open_handle_count = dev->open_handle_count + dev->iamthif_open_count;
624 if (open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) {
Tomas Winkler2bf94cab2014-09-29 16:31:42 +0300625 dev_err(dev->dev, "open_handle_count exceeded %d",
Tomas Winklere036cc52013-09-16 23:44:46 +0300626 MEI_MAX_OPEN_HANDLE_COUNT);
627 return -EMFILE;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200628 }
629
Tomas Winkler781d0d82013-01-08 23:07:22 +0200630 dev->open_handle_count++;
631
632 cl->host_client_id = id;
633 list_add_tail(&cl->link, &dev->file_list);
634
635 set_bit(id, dev->host_clients_map);
636
637 cl->state = MEI_FILE_INITIALIZING;
638
Alexander Usyskinc0abffb2013-09-15 18:11:07 +0300639 cl_dbg(dev, cl, "link cl\n");
Tomas Winkler781d0d82013-01-08 23:07:22 +0200640 return 0;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200641}
Tomas Winkler781d0d82013-01-08 23:07:22 +0200642
Tomas Winkler9ca90502013-01-08 23:07:13 +0200643/**
Alexander Usyskind49ed642015-05-04 09:43:54 +0300644 * mei_cl_unlink - remove host client from the list
Tomas Winkler9ca90502013-01-08 23:07:13 +0200645 *
Masanari Iida393b1482013-04-05 01:05:05 +0900646 * @cl: host client
Alexander Usyskince231392014-09-29 16:31:50 +0300647 *
648 * Return: always 0
Tomas Winkler9ca90502013-01-08 23:07:13 +0200649 */
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200650int mei_cl_unlink(struct mei_cl *cl)
Tomas Winkler9ca90502013-01-08 23:07:13 +0200651{
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200652 struct mei_device *dev;
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200653
Tomas Winkler781d0d82013-01-08 23:07:22 +0200654 /* don't shout on error exit path */
655 if (!cl)
656 return 0;
657
Alexander Usyskinfdd9b862016-01-08 00:49:21 +0200658 /* amthif might not be initialized */
Tomas Winkler8e9a4a92013-01-10 17:32:14 +0200659 if (!cl->dev)
660 return 0;
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200661
662 dev = cl->dev;
663
Tomas Winklera14c44d2013-09-16 23:44:45 +0300664 cl_dbg(dev, cl, "unlink client");
665
Tomas Winkler22f96a02013-09-16 23:44:47 +0300666 if (dev->open_handle_count > 0)
667 dev->open_handle_count--;
668
669 /* never clear the 0 bit */
670 if (cl->host_client_id)
671 clear_bit(cl->host_client_id, dev->host_clients_map);
672
673 list_del_init(&cl->link);
674
675 cl->state = MEI_FILE_INITIALIZING;
676
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200677 return 0;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200678}
679
Alexander Usyskin025fb792016-02-07 23:35:43 +0200680void mei_host_client_init(struct mei_device *dev)
Tomas Winkler9ca90502013-01-08 23:07:13 +0200681{
Tomas Winkler9ca90502013-01-08 23:07:13 +0200682 dev->dev_state = MEI_DEV_ENABLED;
Tomas Winkler6adb8ef2014-01-12 00:36:10 +0200683 dev->reset_count = 0;
Tomas Winkler04bb1392014-03-18 22:52:04 +0200684
Alexander Usyskin025fb792016-02-07 23:35:43 +0200685 schedule_work(&dev->bus_rescan_work);
Tomas Winkler60095952015-07-23 15:08:47 +0300686
Tomas Winkler2bf94cab2014-09-29 16:31:42 +0300687 pm_runtime_mark_last_busy(dev->dev);
688 dev_dbg(dev->dev, "rpm: autosuspend\n");
689 pm_runtime_autosuspend(dev->dev);
Tomas Winkler9ca90502013-01-08 23:07:13 +0200690}
691
Tomas Winkler6aae48f2014-02-19 17:35:47 +0200692/**
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300693 * mei_hbuf_acquire - try to acquire host buffer
Tomas Winkler6aae48f2014-02-19 17:35:47 +0200694 *
695 * @dev: the device structure
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300696 * Return: true if host buffer was acquired
Tomas Winkler6aae48f2014-02-19 17:35:47 +0200697 */
698bool mei_hbuf_acquire(struct mei_device *dev)
699{
Tomas Winkler04bb1392014-03-18 22:52:04 +0200700 if (mei_pg_state(dev) == MEI_PG_ON ||
Alexander Usyskin3dc196e2015-06-13 08:51:17 +0300701 mei_pg_in_transition(dev)) {
Tomas Winkler2bf94cab2014-09-29 16:31:42 +0300702 dev_dbg(dev->dev, "device is in pg\n");
Tomas Winkler04bb1392014-03-18 22:52:04 +0200703 return false;
704 }
705
Tomas Winkler6aae48f2014-02-19 17:35:47 +0200706 if (!dev->hbuf_is_ready) {
Tomas Winkler2bf94cab2014-09-29 16:31:42 +0300707 dev_dbg(dev->dev, "hbuf is not ready\n");
Tomas Winkler6aae48f2014-02-19 17:35:47 +0200708 return false;
709 }
710
711 dev->hbuf_is_ready = false;
712
713 return true;
714}
Tomas Winkler9ca90502013-01-08 23:07:13 +0200715
716/**
Alexander Usyskina4307fe2016-02-07 23:35:35 +0200717 * mei_cl_wake_all - wake up readers, writers and event waiters so
718 * they can be interrupted
719 *
720 * @cl: host client
721 */
722static void mei_cl_wake_all(struct mei_cl *cl)
723{
724 struct mei_device *dev = cl->dev;
725
726 /* synchronized under device mutex */
727 if (waitqueue_active(&cl->rx_wait)) {
728 cl_dbg(dev, cl, "Waking up reading client!\n");
729 wake_up_interruptible(&cl->rx_wait);
730 }
731 /* synchronized under device mutex */
732 if (waitqueue_active(&cl->tx_wait)) {
733 cl_dbg(dev, cl, "Waking up writing client!\n");
734 wake_up_interruptible(&cl->tx_wait);
735 }
736 /* synchronized under device mutex */
737 if (waitqueue_active(&cl->ev_wait)) {
738 cl_dbg(dev, cl, "Waking up waiting for event clients!\n");
739 wake_up_interruptible(&cl->ev_wait);
740 }
Alexander Usyskin7ff4bdd2016-04-20 11:03:55 -0400741 /* synchronized under device mutex */
742 if (waitqueue_active(&cl->wait)) {
743 cl_dbg(dev, cl, "Waking up ctrl write clients!\n");
Alexander Usyskin69f18042016-05-09 00:07:46 -0400744 wake_up(&cl->wait);
Alexander Usyskin7ff4bdd2016-04-20 11:03:55 -0400745 }
Alexander Usyskina4307fe2016-02-07 23:35:35 +0200746}
747
748/**
Tomas Winkler3c666182015-05-04 09:43:52 +0300749 * mei_cl_set_disconnected - set disconnected state and clear
750 * associated states and resources
751 *
752 * @cl: host client
753 */
754void mei_cl_set_disconnected(struct mei_cl *cl)
755{
756 struct mei_device *dev = cl->dev;
757
758 if (cl->state == MEI_FILE_DISCONNECTED ||
759 cl->state == MEI_FILE_INITIALIZING)
760 return;
761
762 cl->state = MEI_FILE_DISCONNECTED;
Alexander Usyskina4307fe2016-02-07 23:35:35 +0200763 mei_io_list_free(&dev->write_list, cl);
764 mei_io_list_free(&dev->write_waiting_list, cl);
Tomas Winkler3c666182015-05-04 09:43:52 +0300765 mei_io_list_flush(&dev->ctrl_rd_list, cl);
766 mei_io_list_flush(&dev->ctrl_wr_list, cl);
Alexander Usyskina4307fe2016-02-07 23:35:35 +0200767 mei_cl_wake_all(cl);
Alexander Usyskin46978ad2016-07-26 01:06:03 +0300768 cl->rx_flow_ctrl_creds = 0;
Tomas Winkler4034b812016-07-26 01:06:04 +0300769 cl->tx_flow_ctrl_creds = 0;
Tomas Winkler3c666182015-05-04 09:43:52 +0300770 cl->timer_count = 0;
Alexander Usyskind49ed642015-05-04 09:43:54 +0300771
Alexander Usyskina03d77f62015-05-04 09:43:55 +0300772 if (!cl->me_cl)
773 return;
774
775 if (!WARN_ON(cl->me_cl->connect_count == 0))
776 cl->me_cl->connect_count--;
777
Alexander Usyskinc241e9b2015-06-13 21:18:40 +0300778 if (cl->me_cl->connect_count == 0)
Tomas Winkler4034b812016-07-26 01:06:04 +0300779 cl->me_cl->tx_flow_ctrl_creds = 0;
Alexander Usyskinc241e9b2015-06-13 21:18:40 +0300780
Alexander Usyskind49ed642015-05-04 09:43:54 +0300781 mei_me_cl_put(cl->me_cl);
782 cl->me_cl = NULL;
Tomas Winkler3c666182015-05-04 09:43:52 +0300783}
784
Alexander Usyskina03d77f62015-05-04 09:43:55 +0300785static int mei_cl_set_connecting(struct mei_cl *cl, struct mei_me_client *me_cl)
786{
Alexander Usyskin1df629e2015-05-04 09:43:56 +0300787 if (!mei_me_cl_get(me_cl))
Alexander Usyskina03d77f62015-05-04 09:43:55 +0300788 return -ENOENT;
789
Alexander Usyskin1df629e2015-05-04 09:43:56 +0300790 /* only one connection is allowed for fixed address clients */
791 if (me_cl->props.fixed_address) {
792 if (me_cl->connect_count) {
793 mei_me_cl_put(me_cl);
794 return -EBUSY;
795 }
796 }
797
798 cl->me_cl = me_cl;
Alexander Usyskina03d77f62015-05-04 09:43:55 +0300799 cl->state = MEI_FILE_CONNECTING;
800 cl->me_cl->connect_count++;
801
802 return 0;
803}
804
Tomas Winkler3c666182015-05-04 09:43:52 +0300805/*
806 * mei_cl_send_disconnect - send disconnect request
807 *
808 * @cl: host client
809 * @cb: callback block
810 *
811 * Return: 0, OK; otherwise, error.
812 */
813static int mei_cl_send_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb)
814{
815 struct mei_device *dev;
816 int ret;
817
818 dev = cl->dev;
819
820 ret = mei_hbm_cl_disconnect_req(dev, cl);
821 cl->status = ret;
822 if (ret) {
823 cl->state = MEI_FILE_DISCONNECT_REPLY;
824 return ret;
825 }
826
827 list_move_tail(&cb->list, &dev->ctrl_rd_list.list);
828 cl->timer_count = MEI_CONNECT_TIMEOUT;
Alexander Usyskin1892fc22016-09-25 13:25:31 +0300829 mei_schedule_stall_timer(dev);
Tomas Winkler3c666182015-05-04 09:43:52 +0300830
831 return 0;
832}
833
834/**
835 * mei_cl_irq_disconnect - processes close related operation from
836 * interrupt thread context - send disconnect request
837 *
838 * @cl: client
839 * @cb: callback block.
840 * @cmpl_list: complete list.
841 *
842 * Return: 0, OK; otherwise, error.
843 */
844int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb,
845 struct mei_cl_cb *cmpl_list)
846{
847 struct mei_device *dev = cl->dev;
848 u32 msg_slots;
849 int slots;
850 int ret;
851
852 msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request));
853 slots = mei_hbuf_empty_slots(dev);
854
855 if (slots < msg_slots)
856 return -EMSGSIZE;
857
858 ret = mei_cl_send_disconnect(cl, cb);
859 if (ret)
860 list_move_tail(&cb->list, &cmpl_list->list);
861
862 return ret;
863}
864
Tomas Winkler3c666182015-05-04 09:43:52 +0300865/**
Alexander Usyskin18901352015-07-23 21:37:13 +0300866 * __mei_cl_disconnect - disconnect host client from the me one
867 * internal function runtime pm has to be already acquired
Tomas Winkler9ca90502013-01-08 23:07:13 +0200868 *
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200869 * @cl: host client
Tomas Winkler9ca90502013-01-08 23:07:13 +0200870 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300871 * Return: 0 on success, <0 on failure.
Tomas Winkler9ca90502013-01-08 23:07:13 +0200872 */
Alexander Usyskin18901352015-07-23 21:37:13 +0300873static int __mei_cl_disconnect(struct mei_cl *cl)
Tomas Winkler9ca90502013-01-08 23:07:13 +0200874{
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200875 struct mei_device *dev;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200876 struct mei_cl_cb *cb;
Alexander Usyskinfe2f17eb32014-07-17 10:53:38 +0300877 int rets;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200878
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200879 dev = cl->dev;
880
Tomas Winkler3c666182015-05-04 09:43:52 +0300881 cl->state = MEI_FILE_DISCONNECTING;
882
Tomas Winkler3030dc02016-07-26 01:06:05 +0300883 cb = mei_cl_enqueue_ctrl_wr_cb(cl, 0, MEI_FOP_DISCONNECT, NULL);
884 if (!cb) {
885 rets = -ENOMEM;
Tomas Winkler3c666182015-05-04 09:43:52 +0300886 goto out;
Tomas Winkler3030dc02016-07-26 01:06:05 +0300887 }
Tomas Winkler5a8373f2014-08-21 14:29:17 +0300888
Tomas Winkler6aae48f2014-02-19 17:35:47 +0200889 if (mei_hbuf_acquire(dev)) {
Tomas Winkler3c666182015-05-04 09:43:52 +0300890 rets = mei_cl_send_disconnect(cl, cb);
891 if (rets) {
Alexander Usyskinc0abffb2013-09-15 18:11:07 +0300892 cl_err(dev, cl, "failed to disconnect.\n");
Tomas Winkler3c666182015-05-04 09:43:52 +0300893 goto out;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200894 }
Tomas Winkler9ca90502013-01-08 23:07:13 +0200895 }
Tomas Winkler3c666182015-05-04 09:43:52 +0300896
Tomas Winkler9ca90502013-01-08 23:07:13 +0200897 mutex_unlock(&dev->device_lock);
Alexander Usyskin7ff4bdd2016-04-20 11:03:55 -0400898 wait_event_timeout(cl->wait,
899 cl->state == MEI_FILE_DISCONNECT_REPLY ||
900 cl->state == MEI_FILE_DISCONNECTED,
Tomas Winkler3c666182015-05-04 09:43:52 +0300901 mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
Tomas Winkler9ca90502013-01-08 23:07:13 +0200902 mutex_lock(&dev->device_lock);
Alexander Usyskinfe2f17eb32014-07-17 10:53:38 +0300903
Tomas Winkler3c666182015-05-04 09:43:52 +0300904 rets = cl->status;
Alexander Usyskin7ff4bdd2016-04-20 11:03:55 -0400905 if (cl->state != MEI_FILE_DISCONNECT_REPLY &&
906 cl->state != MEI_FILE_DISCONNECTED) {
Alexander Usyskinfe2f17eb32014-07-17 10:53:38 +0300907 cl_dbg(dev, cl, "timeout on disconnect from FW client.\n");
908 rets = -ETIME;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200909 }
910
Tomas Winkler3c666182015-05-04 09:43:52 +0300911out:
912 /* we disconnect also on error */
913 mei_cl_set_disconnected(cl);
914 if (!rets)
915 cl_dbg(dev, cl, "successfully disconnected from FW client.\n");
916
Alexander Usyskin18901352015-07-23 21:37:13 +0300917 mei_io_cb_free(cb);
918 return rets;
919}
920
921/**
922 * mei_cl_disconnect - disconnect host client from the me one
923 *
924 * @cl: host client
925 *
926 * Locking: called under "dev->device_lock" lock
927 *
928 * Return: 0 on success, <0 on failure.
929 */
930int mei_cl_disconnect(struct mei_cl *cl)
931{
932 struct mei_device *dev;
933 int rets;
934
935 if (WARN_ON(!cl || !cl->dev))
936 return -ENODEV;
937
938 dev = cl->dev;
939
940 cl_dbg(dev, cl, "disconnecting");
941
942 if (!mei_cl_is_connected(cl))
943 return 0;
944
945 if (mei_cl_is_fixed_address(cl)) {
946 mei_cl_set_disconnected(cl);
947 return 0;
948 }
949
950 rets = pm_runtime_get(dev->dev);
951 if (rets < 0 && rets != -EINPROGRESS) {
952 pm_runtime_put_noidle(dev->dev);
953 cl_err(dev, cl, "rpm: get failed %d\n", rets);
954 return rets;
955 }
956
957 rets = __mei_cl_disconnect(cl);
958
Tomas Winkler04bb1392014-03-18 22:52:04 +0200959 cl_dbg(dev, cl, "rpm: autosuspend\n");
Tomas Winkler2bf94cab2014-09-29 16:31:42 +0300960 pm_runtime_mark_last_busy(dev->dev);
961 pm_runtime_put_autosuspend(dev->dev);
Tomas Winkler04bb1392014-03-18 22:52:04 +0200962
Tomas Winkler9ca90502013-01-08 23:07:13 +0200963 return rets;
964}
965
966
967/**
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200968 * mei_cl_is_other_connecting - checks if other
969 * client with the same me client id is connecting
Tomas Winkler9ca90502013-01-08 23:07:13 +0200970 *
Tomas Winkler9ca90502013-01-08 23:07:13 +0200971 * @cl: private data of the file object
972 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300973 * Return: true if other client is connected, false - otherwise.
Tomas Winkler9ca90502013-01-08 23:07:13 +0200974 */
Tomas Winkler0c533572015-05-04 09:43:53 +0300975static bool mei_cl_is_other_connecting(struct mei_cl *cl)
Tomas Winkler9ca90502013-01-08 23:07:13 +0200976{
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200977 struct mei_device *dev;
Tomas Winkler0c533572015-05-04 09:43:53 +0300978 struct mei_cl_cb *cb;
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200979
980 dev = cl->dev;
981
Tomas Winkler0c533572015-05-04 09:43:53 +0300982 list_for_each_entry(cb, &dev->ctrl_rd_list.list, list) {
983 if (cb->fop_type == MEI_FOP_CONNECT &&
Alexander Usyskind49ed642015-05-04 09:43:54 +0300984 mei_cl_me_id(cl) == mei_cl_me_id(cb->cl))
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200985 return true;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200986 }
Tomas Winkler90e0b5f2013-01-08 23:07:14 +0200987
988 return false;
Tomas Winkler9ca90502013-01-08 23:07:13 +0200989}
990
991/**
Tomas Winkler0c533572015-05-04 09:43:53 +0300992 * mei_cl_send_connect - send connect request
993 *
994 * @cl: host client
995 * @cb: callback block
996 *
997 * Return: 0, OK; otherwise, error.
998 */
999static int mei_cl_send_connect(struct mei_cl *cl, struct mei_cl_cb *cb)
1000{
1001 struct mei_device *dev;
1002 int ret;
1003
1004 dev = cl->dev;
1005
1006 ret = mei_hbm_cl_connect_req(dev, cl);
1007 cl->status = ret;
1008 if (ret) {
1009 cl->state = MEI_FILE_DISCONNECT_REPLY;
1010 return ret;
1011 }
1012
1013 list_move_tail(&cb->list, &dev->ctrl_rd_list.list);
1014 cl->timer_count = MEI_CONNECT_TIMEOUT;
Alexander Usyskin1892fc22016-09-25 13:25:31 +03001015 mei_schedule_stall_timer(dev);
Tomas Winkler0c533572015-05-04 09:43:53 +03001016 return 0;
1017}
1018
1019/**
1020 * mei_cl_irq_connect - send connect request in irq_thread context
1021 *
1022 * @cl: host client
1023 * @cb: callback block
1024 * @cmpl_list: complete list
1025 *
1026 * Return: 0, OK; otherwise, error.
1027 */
1028int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb,
1029 struct mei_cl_cb *cmpl_list)
1030{
1031 struct mei_device *dev = cl->dev;
1032 u32 msg_slots;
1033 int slots;
1034 int rets;
1035
1036 msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request));
1037 slots = mei_hbuf_empty_slots(dev);
1038
1039 if (mei_cl_is_other_connecting(cl))
1040 return 0;
1041
1042 if (slots < msg_slots)
1043 return -EMSGSIZE;
1044
1045 rets = mei_cl_send_connect(cl, cb);
1046 if (rets)
1047 list_move_tail(&cb->list, &cmpl_list->list);
1048
1049 return rets;
1050}
1051
1052/**
Alexander Usyskin83ce0742014-01-08 22:31:46 +02001053 * mei_cl_connect - connect host client to the me one
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001054 *
1055 * @cl: host client
Alexander Usyskind49ed642015-05-04 09:43:54 +03001056 * @me_cl: me client
Tomas Winkler3030dc02016-07-26 01:06:05 +03001057 * @fp: pointer to file structure
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001058 *
1059 * Locking: called under "dev->device_lock" lock
1060 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +03001061 * Return: 0 on success, <0 on failure.
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001062 */
Alexander Usyskind49ed642015-05-04 09:43:54 +03001063int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
Tomas Winkler3030dc02016-07-26 01:06:05 +03001064 const struct file *fp)
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001065{
1066 struct mei_device *dev;
1067 struct mei_cl_cb *cb;
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001068 int rets;
1069
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001070 if (WARN_ON(!cl || !cl->dev || !me_cl))
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001071 return -ENODEV;
1072
1073 dev = cl->dev;
1074
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001075 rets = mei_cl_set_connecting(cl, me_cl);
1076 if (rets)
1077 return rets;
1078
1079 if (mei_cl_is_fixed_address(cl)) {
1080 cl->state = MEI_FILE_CONNECTED;
1081 return 0;
1082 }
1083
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001084 rets = pm_runtime_get(dev->dev);
Tomas Winkler04bb1392014-03-18 22:52:04 +02001085 if (rets < 0 && rets != -EINPROGRESS) {
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001086 pm_runtime_put_noidle(dev->dev);
Tomas Winkler04bb1392014-03-18 22:52:04 +02001087 cl_err(dev, cl, "rpm: get failed %d\n", rets);
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001088 goto nortpm;
Tomas Winkler04bb1392014-03-18 22:52:04 +02001089 }
1090
Tomas Winkler3030dc02016-07-26 01:06:05 +03001091 cb = mei_cl_enqueue_ctrl_wr_cb(cl, 0, MEI_FOP_CONNECT, fp);
1092 if (!cb) {
1093 rets = -ENOMEM;
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001094 goto out;
Tomas Winkler3030dc02016-07-26 01:06:05 +03001095 }
Tomas Winkler0c533572015-05-04 09:43:53 +03001096
Tomas Winkler6aae48f2014-02-19 17:35:47 +02001097 /* run hbuf acquire last so we don't have to undo */
1098 if (!mei_cl_is_other_connecting(cl) && mei_hbuf_acquire(dev)) {
Tomas Winkler0c533572015-05-04 09:43:53 +03001099 rets = mei_cl_send_connect(cl, cb);
1100 if (rets)
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001101 goto out;
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001102 }
1103
1104 mutex_unlock(&dev->device_lock);
Tomas Winkler12f45ed2014-08-21 14:29:18 +03001105 wait_event_timeout(cl->wait,
Alexander Usyskin285e2992014-02-17 15:13:20 +02001106 (cl->state == MEI_FILE_CONNECTED ||
Alexander Usyskin7ff4bdd2016-04-20 11:03:55 -04001107 cl->state == MEI_FILE_DISCONNECTED ||
Alexander Usyskin18901352015-07-23 21:37:13 +03001108 cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
Tomas Winkler3c666182015-05-04 09:43:52 +03001109 cl->state == MEI_FILE_DISCONNECT_REPLY),
Alexander Usyskin285e2992014-02-17 15:13:20 +02001110 mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001111 mutex_lock(&dev->device_lock);
1112
Tomas Winklerf3de9b62015-03-27 00:27:58 +02001113 if (!mei_cl_is_connected(cl)) {
Alexander Usyskin18901352015-07-23 21:37:13 +03001114 if (cl->state == MEI_FILE_DISCONNECT_REQUIRED) {
1115 mei_io_list_flush(&dev->ctrl_rd_list, cl);
1116 mei_io_list_flush(&dev->ctrl_wr_list, cl);
1117 /* ignore disconnect return valuue;
1118 * in case of failure reset will be invoked
1119 */
1120 __mei_cl_disconnect(cl);
1121 rets = -EFAULT;
1122 goto out;
1123 }
1124
Tomas Winkler0c533572015-05-04 09:43:53 +03001125 /* timeout or something went really wrong */
Alexander Usyskin285e2992014-02-17 15:13:20 +02001126 if (!cl->status)
1127 cl->status = -EFAULT;
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001128 }
1129
1130 rets = cl->status;
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001131out:
Tomas Winkler04bb1392014-03-18 22:52:04 +02001132 cl_dbg(dev, cl, "rpm: autosuspend\n");
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001133 pm_runtime_mark_last_busy(dev->dev);
1134 pm_runtime_put_autosuspend(dev->dev);
Tomas Winkler04bb1392014-03-18 22:52:04 +02001135
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001136 mei_io_cb_free(cb);
Tomas Winkler0c533572015-05-04 09:43:53 +03001137
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001138nortpm:
Tomas Winkler0c533572015-05-04 09:43:53 +03001139 if (!mei_cl_is_connected(cl))
1140 mei_cl_set_disconnected(cl);
1141
Tomas Winkler9f81abda2013-01-08 23:07:15 +02001142 return rets;
1143}
1144
1145/**
Tomas Winkler03b8d342015-02-10 10:39:44 +02001146 * mei_cl_alloc_linked - allocate and link host client
1147 *
1148 * @dev: the device structure
Tomas Winkler03b8d342015-02-10 10:39:44 +02001149 *
1150 * Return: cl on success ERR_PTR on failure
1151 */
Alexander Usyskin7851e002016-02-07 23:35:40 +02001152struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev)
Tomas Winkler03b8d342015-02-10 10:39:44 +02001153{
1154 struct mei_cl *cl;
1155 int ret;
1156
1157 cl = mei_cl_allocate(dev);
1158 if (!cl) {
1159 ret = -ENOMEM;
1160 goto err;
1161 }
1162
Alexander Usyskin7851e002016-02-07 23:35:40 +02001163 ret = mei_cl_link(cl);
Tomas Winkler03b8d342015-02-10 10:39:44 +02001164 if (ret)
1165 goto err;
1166
1167 return cl;
1168err:
1169 kfree(cl);
1170 return ERR_PTR(ret);
1171}
1172
Tomas Winkler03b8d342015-02-10 10:39:44 +02001173/**
Tomas Winkler4034b812016-07-26 01:06:04 +03001174 * mei_cl_tx_flow_ctrl_creds - checks flow_control credits for cl.
Tomas Winkler9ca90502013-01-08 23:07:13 +02001175 *
Alexander Usyskin06ee5362016-02-07 23:35:37 +02001176 * @cl: host client
Tomas Winkler9ca90502013-01-08 23:07:13 +02001177 *
Tomas Winkler4034b812016-07-26 01:06:04 +03001178 * Return: 1 if tx_flow_ctrl_creds >0, 0 - otherwise.
Tomas Winkler9ca90502013-01-08 23:07:13 +02001179 */
Tomas Winkler4034b812016-07-26 01:06:04 +03001180static int mei_cl_tx_flow_ctrl_creds(struct mei_cl *cl)
Tomas Winkler9ca90502013-01-08 23:07:13 +02001181{
Alexander Usyskind49ed642015-05-04 09:43:54 +03001182 if (WARN_ON(!cl || !cl->me_cl))
Tomas Winkler90e0b5f2013-01-08 23:07:14 +02001183 return -EINVAL;
1184
Tomas Winkler4034b812016-07-26 01:06:04 +03001185 if (cl->tx_flow_ctrl_creds > 0)
Tomas Winkler9ca90502013-01-08 23:07:13 +02001186 return 1;
1187
Alexander Usyskina808c802016-06-16 17:58:58 +03001188 if (mei_cl_is_fixed_address(cl))
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001189 return 1;
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001190
Alexander Usyskind49ed642015-05-04 09:43:54 +03001191 if (mei_cl_is_single_recv_buf(cl)) {
Tomas Winkler4034b812016-07-26 01:06:04 +03001192 if (cl->me_cl->tx_flow_ctrl_creds > 0)
Alexander Usyskind49ed642015-05-04 09:43:54 +03001193 return 1;
Tomas Winkler9ca90502013-01-08 23:07:13 +02001194 }
Alexander Usyskind49ed642015-05-04 09:43:54 +03001195 return 0;
Tomas Winkler9ca90502013-01-08 23:07:13 +02001196}
1197
1198/**
Tomas Winkler4034b812016-07-26 01:06:04 +03001199 * mei_cl_tx_flow_ctrl_creds_reduce - reduces transmit flow control credits
1200 * for a client
Tomas Winkler9ca90502013-01-08 23:07:13 +02001201 *
Tomas Winkler4034b812016-07-26 01:06:04 +03001202 * @cl: host client
Masanari Iida393b1482013-04-05 01:05:05 +09001203 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +03001204 * Return:
Tomas Winkler9ca90502013-01-08 23:07:13 +02001205 * 0 on success
Tomas Winkler9ca90502013-01-08 23:07:13 +02001206 * -EINVAL when ctrl credits are <= 0
1207 */
Tomas Winkler4034b812016-07-26 01:06:04 +03001208static int mei_cl_tx_flow_ctrl_creds_reduce(struct mei_cl *cl)
Tomas Winkler9ca90502013-01-08 23:07:13 +02001209{
Alexander Usyskind49ed642015-05-04 09:43:54 +03001210 if (WARN_ON(!cl || !cl->me_cl))
Tomas Winkler90e0b5f2013-01-08 23:07:14 +02001211 return -EINVAL;
1212
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001213 if (mei_cl_is_fixed_address(cl))
1214 return 0;
1215
Alexander Usyskind49ed642015-05-04 09:43:54 +03001216 if (mei_cl_is_single_recv_buf(cl)) {
Tomas Winkler4034b812016-07-26 01:06:04 +03001217 if (WARN_ON(cl->me_cl->tx_flow_ctrl_creds <= 0))
Alexander Usyskind49ed642015-05-04 09:43:54 +03001218 return -EINVAL;
Tomas Winkler4034b812016-07-26 01:06:04 +03001219 cl->me_cl->tx_flow_ctrl_creds--;
Alexander Usyskin12d00662014-02-17 15:13:23 +02001220 } else {
Tomas Winkler4034b812016-07-26 01:06:04 +03001221 if (WARN_ON(cl->tx_flow_ctrl_creds <= 0))
Alexander Usyskind49ed642015-05-04 09:43:54 +03001222 return -EINVAL;
Tomas Winkler4034b812016-07-26 01:06:04 +03001223 cl->tx_flow_ctrl_creds--;
Alexander Usyskin12d00662014-02-17 15:13:23 +02001224 }
Alexander Usyskind49ed642015-05-04 09:43:54 +03001225 return 0;
Tomas Winkler9ca90502013-01-08 23:07:13 +02001226}
1227
Tomas Winkler9ca90502013-01-08 23:07:13 +02001228/**
Tomas Winkler51678cc2015-07-26 09:54:18 +03001229 * mei_cl_notify_fop2req - convert fop to proper request
1230 *
1231 * @fop: client notification start response command
1232 *
1233 * Return: MEI_HBM_NOTIFICATION_START/STOP
1234 */
1235u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop)
1236{
1237 if (fop == MEI_FOP_NOTIFY_START)
1238 return MEI_HBM_NOTIFICATION_START;
1239 else
1240 return MEI_HBM_NOTIFICATION_STOP;
1241}
1242
1243/**
1244 * mei_cl_notify_req2fop - convert notification request top file operation type
1245 *
1246 * @req: hbm notification request type
1247 *
1248 * Return: MEI_FOP_NOTIFY_START/STOP
1249 */
1250enum mei_cb_file_ops mei_cl_notify_req2fop(u8 req)
1251{
1252 if (req == MEI_HBM_NOTIFICATION_START)
1253 return MEI_FOP_NOTIFY_START;
1254 else
1255 return MEI_FOP_NOTIFY_STOP;
1256}
1257
1258/**
1259 * mei_cl_irq_notify - send notification request in irq_thread context
1260 *
1261 * @cl: client
1262 * @cb: callback block.
1263 * @cmpl_list: complete list.
1264 *
1265 * Return: 0 on such and error otherwise.
1266 */
1267int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb,
1268 struct mei_cl_cb *cmpl_list)
1269{
1270 struct mei_device *dev = cl->dev;
1271 u32 msg_slots;
1272 int slots;
1273 int ret;
1274 bool request;
1275
1276 msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request));
1277 slots = mei_hbuf_empty_slots(dev);
1278
1279 if (slots < msg_slots)
1280 return -EMSGSIZE;
1281
1282 request = mei_cl_notify_fop2req(cb->fop_type);
1283 ret = mei_hbm_cl_notify_req(dev, cl, request);
1284 if (ret) {
1285 cl->status = ret;
1286 list_move_tail(&cb->list, &cmpl_list->list);
1287 return ret;
1288 }
1289
1290 list_move_tail(&cb->list, &dev->ctrl_rd_list.list);
1291 return 0;
1292}
1293
1294/**
1295 * mei_cl_notify_request - send notification stop/start request
1296 *
1297 * @cl: host client
Tomas Winkler3030dc02016-07-26 01:06:05 +03001298 * @fp: associate request with file
Tomas Winkler51678cc2015-07-26 09:54:18 +03001299 * @request: 1 for start or 0 for stop
1300 *
1301 * Locking: called under "dev->device_lock" lock
1302 *
1303 * Return: 0 on such and error otherwise.
1304 */
Tomas Winklerf23e2cc2016-02-07 23:35:23 +02001305int mei_cl_notify_request(struct mei_cl *cl,
Tomas Winkler3030dc02016-07-26 01:06:05 +03001306 const struct file *fp, u8 request)
Tomas Winkler51678cc2015-07-26 09:54:18 +03001307{
1308 struct mei_device *dev;
1309 struct mei_cl_cb *cb;
1310 enum mei_cb_file_ops fop_type;
1311 int rets;
1312
1313 if (WARN_ON(!cl || !cl->dev))
1314 return -ENODEV;
1315
1316 dev = cl->dev;
1317
1318 if (!dev->hbm_f_ev_supported) {
1319 cl_dbg(dev, cl, "notifications not supported\n");
1320 return -EOPNOTSUPP;
1321 }
1322
1323 rets = pm_runtime_get(dev->dev);
1324 if (rets < 0 && rets != -EINPROGRESS) {
1325 pm_runtime_put_noidle(dev->dev);
1326 cl_err(dev, cl, "rpm: get failed %d\n", rets);
1327 return rets;
1328 }
1329
1330 fop_type = mei_cl_notify_req2fop(request);
Tomas Winkler3030dc02016-07-26 01:06:05 +03001331 cb = mei_cl_enqueue_ctrl_wr_cb(cl, 0, fop_type, fp);
Tomas Winkler51678cc2015-07-26 09:54:18 +03001332 if (!cb) {
1333 rets = -ENOMEM;
1334 goto out;
1335 }
1336
1337 if (mei_hbuf_acquire(dev)) {
1338 if (mei_hbm_cl_notify_req(dev, cl, request)) {
1339 rets = -ENODEV;
1340 goto out;
1341 }
Tomas Winkler3030dc02016-07-26 01:06:05 +03001342 list_move_tail(&cb->list, &dev->ctrl_rd_list.list);
Tomas Winkler51678cc2015-07-26 09:54:18 +03001343 }
1344
1345 mutex_unlock(&dev->device_lock);
Alexander Usyskin7ff4bdd2016-04-20 11:03:55 -04001346 wait_event_timeout(cl->wait,
1347 cl->notify_en == request || !mei_cl_is_connected(cl),
1348 mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
Tomas Winkler51678cc2015-07-26 09:54:18 +03001349 mutex_lock(&dev->device_lock);
1350
Alexander Usyskin4a8eaa92016-04-20 11:03:54 -04001351 if (cl->notify_en != request && !cl->status)
1352 cl->status = -EFAULT;
Tomas Winkler51678cc2015-07-26 09:54:18 +03001353
1354 rets = cl->status;
1355
1356out:
1357 cl_dbg(dev, cl, "rpm: autosuspend\n");
1358 pm_runtime_mark_last_busy(dev->dev);
1359 pm_runtime_put_autosuspend(dev->dev);
1360
1361 mei_io_cb_free(cb);
1362 return rets;
1363}
1364
1365/**
Tomas Winkler237092b2015-07-26 09:54:22 +03001366 * mei_cl_notify - raise notification
1367 *
1368 * @cl: host client
1369 *
1370 * Locking: called under "dev->device_lock" lock
1371 */
1372void mei_cl_notify(struct mei_cl *cl)
1373{
1374 struct mei_device *dev;
1375
1376 if (!cl || !cl->dev)
1377 return;
1378
1379 dev = cl->dev;
1380
1381 if (!cl->notify_en)
1382 return;
1383
1384 cl_dbg(dev, cl, "notify event");
1385 cl->notify_ev = true;
Tomas Winkler850f8942016-02-07 23:35:31 +02001386 if (!mei_cl_bus_notify_event(cl))
1387 wake_up_interruptible(&cl->ev_wait);
Tomas Winkler237092b2015-07-26 09:54:22 +03001388
1389 if (cl->ev_async)
1390 kill_fasync(&cl->ev_async, SIGIO, POLL_PRI);
Alexander Usyskinbb2ef9c2015-07-26 09:54:23 +03001391
Tomas Winkler237092b2015-07-26 09:54:22 +03001392}
1393
1394/**
Tomas Winklerb38a3622015-07-26 09:54:19 +03001395 * mei_cl_notify_get - get or wait for notification event
1396 *
1397 * @cl: host client
1398 * @block: this request is blocking
1399 * @notify_ev: true if notification event was received
1400 *
1401 * Locking: called under "dev->device_lock" lock
1402 *
1403 * Return: 0 on such and error otherwise.
1404 */
1405int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev)
1406{
1407 struct mei_device *dev;
1408 int rets;
1409
1410 *notify_ev = false;
1411
1412 if (WARN_ON(!cl || !cl->dev))
1413 return -ENODEV;
1414
1415 dev = cl->dev;
1416
1417 if (!mei_cl_is_connected(cl))
1418 return -ENODEV;
1419
1420 if (cl->notify_ev)
1421 goto out;
1422
1423 if (!block)
1424 return -EAGAIN;
1425
1426 mutex_unlock(&dev->device_lock);
1427 rets = wait_event_interruptible(cl->ev_wait, cl->notify_ev);
1428 mutex_lock(&dev->device_lock);
1429
1430 if (rets < 0)
1431 return rets;
1432
1433out:
1434 *notify_ev = cl->notify_ev;
1435 cl->notify_ev = false;
1436 return 0;
1437}
1438
1439/**
Masanari Iida393b1482013-04-05 01:05:05 +09001440 * mei_cl_read_start - the start read client message function.
Tomas Winkler9ca90502013-01-08 23:07:13 +02001441 *
Tomas Winkler90e0b5f2013-01-08 23:07:14 +02001442 * @cl: host client
Alexander Usyskince231392014-09-29 16:31:50 +03001443 * @length: number of bytes to read
Tomas Winklerbca67d62015-02-10 10:39:43 +02001444 * @fp: pointer to file structure
Tomas Winkler9ca90502013-01-08 23:07:13 +02001445 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +03001446 * Return: 0 on success, <0 on failure.
Tomas Winkler9ca90502013-01-08 23:07:13 +02001447 */
Tomas Winklerf23e2cc2016-02-07 23:35:23 +02001448int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp)
Tomas Winkler9ca90502013-01-08 23:07:13 +02001449{
Tomas Winkler90e0b5f2013-01-08 23:07:14 +02001450 struct mei_device *dev;
Tomas Winkler9ca90502013-01-08 23:07:13 +02001451 struct mei_cl_cb *cb;
1452 int rets;
Tomas Winkler9ca90502013-01-08 23:07:13 +02001453
Tomas Winkler90e0b5f2013-01-08 23:07:14 +02001454 if (WARN_ON(!cl || !cl->dev))
1455 return -ENODEV;
1456
1457 dev = cl->dev;
1458
Tomas Winklerb950ac12013-07-25 20:15:53 +03001459 if (!mei_cl_is_connected(cl))
Tomas Winkler9ca90502013-01-08 23:07:13 +02001460 return -ENODEV;
1461
Alexander Usyskind49ed642015-05-04 09:43:54 +03001462 if (!mei_me_cl_is_active(cl->me_cl)) {
1463 cl_err(dev, cl, "no such me client\n");
Alexander Usyskin7ca96aa2014-02-19 17:35:49 +02001464 return -ENOTTY;
Tomas Winkler9ca90502013-01-08 23:07:13 +02001465 }
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001466
Alexander Usyskin9d27e732016-07-26 01:06:07 +03001467 if (mei_cl_is_fixed_address(cl) || cl == &dev->iamthif_cl)
Alexander Usyskine51dfa52016-07-26 01:06:02 +03001468 return 0;
1469
Alexander Usyskin46978ad2016-07-26 01:06:03 +03001470 /* HW currently supports only one pending read */
1471 if (cl->rx_flow_ctrl_creds)
1472 return -EBUSY;
1473
Tomas Winkler3030dc02016-07-26 01:06:05 +03001474 cb = mei_cl_enqueue_ctrl_wr_cb(cl, length, MEI_FOP_READ, fp);
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001475 if (!cb)
1476 return -ENOMEM;
1477
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001478 rets = pm_runtime_get(dev->dev);
Tomas Winkler04bb1392014-03-18 22:52:04 +02001479 if (rets < 0 && rets != -EINPROGRESS) {
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001480 pm_runtime_put_noidle(dev->dev);
Tomas Winkler04bb1392014-03-18 22:52:04 +02001481 cl_err(dev, cl, "rpm: get failed %d\n", rets);
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001482 goto nortpm;
Tomas Winkler04bb1392014-03-18 22:52:04 +02001483 }
1484
Alexander Usyskin46978ad2016-07-26 01:06:03 +03001485 rets = 0;
Tomas Winkler6aae48f2014-02-19 17:35:47 +02001486 if (mei_hbuf_acquire(dev)) {
Alexander Usyskin86113502014-03-31 17:59:24 +03001487 rets = mei_hbm_cl_flow_control_req(dev, cl);
1488 if (rets < 0)
Tomas Winkler04bb1392014-03-18 22:52:04 +02001489 goto out;
Tomas Winkler04bb1392014-03-18 22:52:04 +02001490
Alexander Usyskin46978ad2016-07-26 01:06:03 +03001491 list_move_tail(&cb->list, &cl->rd_pending);
Tomas Winkler9ca90502013-01-08 23:07:13 +02001492 }
Alexander Usyskin46978ad2016-07-26 01:06:03 +03001493 cl->rx_flow_ctrl_creds++;
Chao Biaccb8842014-02-12 21:27:25 +02001494
Tomas Winkler04bb1392014-03-18 22:52:04 +02001495out:
1496 cl_dbg(dev, cl, "rpm: autosuspend\n");
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001497 pm_runtime_mark_last_busy(dev->dev);
1498 pm_runtime_put_autosuspend(dev->dev);
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001499nortpm:
Tomas Winkler04bb1392014-03-18 22:52:04 +02001500 if (rets)
1501 mei_io_cb_free(cb);
1502
Tomas Winkler9ca90502013-01-08 23:07:13 +02001503 return rets;
1504}
1505
Tomas Winkler074b4c02013-02-06 14:06:44 +02001506/**
Tomas Winkler9d098192014-02-19 17:35:48 +02001507 * mei_cl_irq_write - write a message to device
Tomas Winkler21767542013-06-23 09:36:59 +03001508 * from the interrupt thread context
1509 *
1510 * @cl: client
1511 * @cb: callback block.
Tomas Winkler21767542013-06-23 09:36:59 +03001512 * @cmpl_list: complete list.
1513 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +03001514 * Return: 0, OK; otherwise error.
Tomas Winkler21767542013-06-23 09:36:59 +03001515 */
Tomas Winkler9d098192014-02-19 17:35:48 +02001516int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
1517 struct mei_cl_cb *cmpl_list)
Tomas Winkler21767542013-06-23 09:36:59 +03001518{
Tomas Winkler136698e2013-09-16 23:44:44 +03001519 struct mei_device *dev;
1520 struct mei_msg_data *buf;
Tomas Winkler21767542013-06-23 09:36:59 +03001521 struct mei_msg_hdr mei_hdr;
Tomas Winkler136698e2013-09-16 23:44:44 +03001522 size_t len;
1523 u32 msg_slots;
Tomas Winkler9d098192014-02-19 17:35:48 +02001524 int slots;
Tomas Winkler2ebf8c92013-09-16 23:44:43 +03001525 int rets;
Alexander Usyskinb8b7303572015-05-07 15:53:58 +03001526 bool first_chunk;
Tomas Winkler21767542013-06-23 09:36:59 +03001527
Tomas Winkler136698e2013-09-16 23:44:44 +03001528 if (WARN_ON(!cl || !cl->dev))
1529 return -ENODEV;
1530
1531 dev = cl->dev;
1532
Tomas Winkler5db75142015-02-10 10:39:42 +02001533 buf = &cb->buf;
Tomas Winkler136698e2013-09-16 23:44:44 +03001534
Alexander Usyskinb8b7303572015-05-07 15:53:58 +03001535 first_chunk = cb->buf_idx == 0;
1536
Tomas Winkler4034b812016-07-26 01:06:04 +03001537 rets = first_chunk ? mei_cl_tx_flow_ctrl_creds(cl) : 1;
Tomas Winkler136698e2013-09-16 23:44:44 +03001538 if (rets < 0)
1539 return rets;
1540
1541 if (rets == 0) {
Tomas Winkler04bb1392014-03-18 22:52:04 +02001542 cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
Tomas Winkler136698e2013-09-16 23:44:44 +03001543 return 0;
1544 }
1545
Tomas Winkler9d098192014-02-19 17:35:48 +02001546 slots = mei_hbuf_empty_slots(dev);
Tomas Winkler136698e2013-09-16 23:44:44 +03001547 len = buf->size - cb->buf_idx;
1548 msg_slots = mei_data2slots(len);
1549
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001550 mei_hdr.host_addr = mei_cl_host_addr(cl);
Alexander Usyskind49ed642015-05-04 09:43:54 +03001551 mei_hdr.me_addr = mei_cl_me_id(cl);
Tomas Winkler21767542013-06-23 09:36:59 +03001552 mei_hdr.reserved = 0;
Tomas Winkler479327f2013-12-17 15:56:56 +02001553 mei_hdr.internal = cb->internal;
Tomas Winkler21767542013-06-23 09:36:59 +03001554
Tomas Winkler9d098192014-02-19 17:35:48 +02001555 if (slots >= msg_slots) {
Tomas Winkler21767542013-06-23 09:36:59 +03001556 mei_hdr.length = len;
1557 mei_hdr.msg_complete = 1;
1558 /* Split the message only if we can write the whole host buffer */
Tomas Winkler9d098192014-02-19 17:35:48 +02001559 } else if (slots == dev->hbuf_depth) {
1560 msg_slots = slots;
1561 len = (slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
Tomas Winkler21767542013-06-23 09:36:59 +03001562 mei_hdr.length = len;
1563 mei_hdr.msg_complete = 0;
1564 } else {
1565 /* wait for next time the host buffer is empty */
1566 return 0;
1567 }
1568
Alexander Usyskin35bf7692016-02-17 18:27:34 +02001569 cl_dbg(dev, cl, "buf: size = %zu idx = %zu\n",
Tomas Winkler5db75142015-02-10 10:39:42 +02001570 cb->buf.size, cb->buf_idx);
Tomas Winkler21767542013-06-23 09:36:59 +03001571
Tomas Winkler136698e2013-09-16 23:44:44 +03001572 rets = mei_write_message(dev, &mei_hdr, buf->data + cb->buf_idx);
Tomas Winkler2ebf8c92013-09-16 23:44:43 +03001573 if (rets) {
1574 cl->status = rets;
Tomas Winkler21767542013-06-23 09:36:59 +03001575 list_move_tail(&cb->list, &cmpl_list->list);
Tomas Winkler2ebf8c92013-09-16 23:44:43 +03001576 return rets;
Tomas Winkler21767542013-06-23 09:36:59 +03001577 }
1578
1579 cl->status = 0;
Tomas Winkler4dfaa9f2013-06-23 09:37:00 +03001580 cl->writing_state = MEI_WRITING;
Tomas Winkler21767542013-06-23 09:36:59 +03001581 cb->buf_idx += mei_hdr.length;
Tomas Winkler86601722015-02-10 10:39:40 +02001582 cb->completed = mei_hdr.msg_complete == 1;
Tomas Winkler4dfaa9f2013-06-23 09:37:00 +03001583
Alexander Usyskinb8b7303572015-05-07 15:53:58 +03001584 if (first_chunk) {
Tomas Winkler4034b812016-07-26 01:06:04 +03001585 if (mei_cl_tx_flow_ctrl_creds_reduce(cl))
Tomas Winkler2ebf8c92013-09-16 23:44:43 +03001586 return -EIO;
Tomas Winkler21767542013-06-23 09:36:59 +03001587 }
1588
Alexander Usyskinb8b7303572015-05-07 15:53:58 +03001589 if (mei_hdr.msg_complete)
1590 list_move_tail(&cb->list, &dev->write_waiting_list.list);
1591
Tomas Winkler21767542013-06-23 09:36:59 +03001592 return 0;
1593}
1594
1595/**
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001596 * mei_cl_write - submit a write cb to mei device
Alexander Usyskina8605ea2014-09-29 16:31:49 +03001597 * assumes device_lock is locked
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001598 *
1599 * @cl: host client
Alexander Usyskina8605ea2014-09-29 16:31:49 +03001600 * @cb: write callback with filled data
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001601 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +03001602 * Return: number of bytes sent on success, <0 on failure.
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001603 */
Alexander Usyskine0cb6b22016-11-08 18:26:08 +02001604int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb)
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001605{
1606 struct mei_device *dev;
1607 struct mei_msg_data *buf;
1608 struct mei_msg_hdr mei_hdr;
Alexander Usyskin23253c32015-07-23 10:43:11 +03001609 int size;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001610 int rets;
Alexander Usyskine0cb6b22016-11-08 18:26:08 +02001611 bool blocking;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001612
1613 if (WARN_ON(!cl || !cl->dev))
1614 return -ENODEV;
1615
1616 if (WARN_ON(!cb))
1617 return -EINVAL;
1618
1619 dev = cl->dev;
1620
Tomas Winkler5db75142015-02-10 10:39:42 +02001621 buf = &cb->buf;
Alexander Usyskin23253c32015-07-23 10:43:11 +03001622 size = buf->size;
Alexander Usyskine0cb6b22016-11-08 18:26:08 +02001623 blocking = cb->blocking;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001624
Alexander Usyskin23253c32015-07-23 10:43:11 +03001625 cl_dbg(dev, cl, "size=%d\n", size);
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001626
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001627 rets = pm_runtime_get(dev->dev);
Tomas Winkler04bb1392014-03-18 22:52:04 +02001628 if (rets < 0 && rets != -EINPROGRESS) {
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001629 pm_runtime_put_noidle(dev->dev);
Tomas Winkler04bb1392014-03-18 22:52:04 +02001630 cl_err(dev, cl, "rpm: get failed %d\n", rets);
Alexander Usyskin6cbb0972016-02-10 23:57:26 +02001631 goto free;
Tomas Winkler04bb1392014-03-18 22:52:04 +02001632 }
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001633
Tomas Winkler6aae48f2014-02-19 17:35:47 +02001634 cb->buf_idx = 0;
1635 cl->writing_state = MEI_IDLE;
1636
Alexander Usyskin1df629e2015-05-04 09:43:56 +03001637 mei_hdr.host_addr = mei_cl_host_addr(cl);
Alexander Usyskind49ed642015-05-04 09:43:54 +03001638 mei_hdr.me_addr = mei_cl_me_id(cl);
Tomas Winkler6aae48f2014-02-19 17:35:47 +02001639 mei_hdr.reserved = 0;
1640 mei_hdr.msg_complete = 0;
1641 mei_hdr.internal = cb->internal;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001642
Tomas Winkler4034b812016-07-26 01:06:04 +03001643 rets = mei_cl_tx_flow_ctrl_creds(cl);
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001644 if (rets < 0)
1645 goto err;
1646
Tomas Winkler6aae48f2014-02-19 17:35:47 +02001647 if (rets == 0) {
1648 cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
Alexander Usyskin23253c32015-07-23 10:43:11 +03001649 rets = size;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001650 goto out;
1651 }
Tomas Winkler6aae48f2014-02-19 17:35:47 +02001652 if (!mei_hbuf_acquire(dev)) {
1653 cl_dbg(dev, cl, "Cannot acquire the host buffer: not sending.\n");
Alexander Usyskin23253c32015-07-23 10:43:11 +03001654 rets = size;
Tomas Winkler6aae48f2014-02-19 17:35:47 +02001655 goto out;
1656 }
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001657
1658 /* Check for a maximum length */
Alexander Usyskin23253c32015-07-23 10:43:11 +03001659 if (size > mei_hbuf_max_len(dev)) {
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001660 mei_hdr.length = mei_hbuf_max_len(dev);
1661 mei_hdr.msg_complete = 0;
1662 } else {
Alexander Usyskin23253c32015-07-23 10:43:11 +03001663 mei_hdr.length = size;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001664 mei_hdr.msg_complete = 1;
1665 }
1666
Tomas Winkler2ebf8c92013-09-16 23:44:43 +03001667 rets = mei_write_message(dev, &mei_hdr, buf->data);
1668 if (rets)
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001669 goto err;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001670
Tomas Winkler4034b812016-07-26 01:06:04 +03001671 rets = mei_cl_tx_flow_ctrl_creds_reduce(cl);
Alexander Usyskinb8b7303572015-05-07 15:53:58 +03001672 if (rets)
1673 goto err;
1674
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001675 cl->writing_state = MEI_WRITING;
1676 cb->buf_idx = mei_hdr.length;
Tomas Winkler86601722015-02-10 10:39:40 +02001677 cb->completed = mei_hdr.msg_complete == 1;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001678
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001679out:
Alexander Usyskinb8b7303572015-05-07 15:53:58 +03001680 if (mei_hdr.msg_complete)
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001681 list_add_tail(&cb->list, &dev->write_waiting_list.list);
Alexander Usyskinb8b7303572015-05-07 15:53:58 +03001682 else
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001683 list_add_tail(&cb->list, &dev->write_list.list);
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001684
Alexander Usyskin23253c32015-07-23 10:43:11 +03001685 cb = NULL;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001686 if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) {
1687
1688 mutex_unlock(&dev->device_lock);
Alexander Usyskin7ca96aa2014-02-19 17:35:49 +02001689 rets = wait_event_interruptible(cl->tx_wait,
Alexander Usyskin0faf6a32016-02-07 23:35:34 +02001690 cl->writing_state == MEI_WRITE_COMPLETE ||
1691 (!mei_cl_is_connected(cl)));
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001692 mutex_lock(&dev->device_lock);
Alexander Usyskin7ca96aa2014-02-19 17:35:49 +02001693 /* wait_event_interruptible returns -ERESTARTSYS */
1694 if (rets) {
1695 if (signal_pending(current))
1696 rets = -EINTR;
1697 goto err;
1698 }
Alexander Usyskin0faf6a32016-02-07 23:35:34 +02001699 if (cl->writing_state != MEI_WRITE_COMPLETE) {
1700 rets = -EFAULT;
1701 goto err;
1702 }
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001703 }
Alexander Usyskin7ca96aa2014-02-19 17:35:49 +02001704
Alexander Usyskin23253c32015-07-23 10:43:11 +03001705 rets = size;
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001706err:
Tomas Winkler04bb1392014-03-18 22:52:04 +02001707 cl_dbg(dev, cl, "rpm: autosuspend\n");
Tomas Winkler2bf94cab2014-09-29 16:31:42 +03001708 pm_runtime_mark_last_busy(dev->dev);
1709 pm_runtime_put_autosuspend(dev->dev);
Alexander Usyskin6cbb0972016-02-10 23:57:26 +02001710free:
1711 mei_io_cb_free(cb);
Tomas Winkler04bb1392014-03-18 22:52:04 +02001712
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001713 return rets;
1714}
1715
1716
Tomas Winklerdb086fa2013-05-12 15:34:45 +03001717/**
1718 * mei_cl_complete - processes completed operation for a client
1719 *
1720 * @cl: private data of the file object.
1721 * @cb: callback block.
1722 */
1723void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
1724{
Alexander Usyskina1809d32015-05-07 15:53:59 +03001725 struct mei_device *dev = cl->dev;
1726
Tomas Winkler3c666182015-05-04 09:43:52 +03001727 switch (cb->fop_type) {
1728 case MEI_FOP_WRITE:
Tomas Winklerdb086fa2013-05-12 15:34:45 +03001729 mei_io_cb_free(cb);
Tomas Winklerdb086fa2013-05-12 15:34:45 +03001730 cl->writing_state = MEI_WRITE_COMPLETE;
Alexander Usyskina1809d32015-05-07 15:53:59 +03001731 if (waitqueue_active(&cl->tx_wait)) {
Tomas Winklerdb086fa2013-05-12 15:34:45 +03001732 wake_up_interruptible(&cl->tx_wait);
Alexander Usyskina1809d32015-05-07 15:53:59 +03001733 } else {
1734 pm_runtime_mark_last_busy(dev->dev);
1735 pm_request_autosuspend(dev->dev);
1736 }
Tomas Winkler3c666182015-05-04 09:43:52 +03001737 break;
Tomas Winklerdb086fa2013-05-12 15:34:45 +03001738
Tomas Winkler3c666182015-05-04 09:43:52 +03001739 case MEI_FOP_READ:
Tomas Winklera9bed612015-02-10 10:39:46 +02001740 list_add_tail(&cb->list, &cl->rd_completed);
Alexander Usyskin46978ad2016-07-26 01:06:03 +03001741 if (!mei_cl_is_fixed_address(cl) &&
1742 !WARN_ON(!cl->rx_flow_ctrl_creds))
1743 cl->rx_flow_ctrl_creds--;
Tomas Winklera1f9ae22016-02-07 23:35:30 +02001744 if (!mei_cl_bus_rx_event(cl))
1745 wake_up_interruptible(&cl->rx_wait);
Tomas Winkler3c666182015-05-04 09:43:52 +03001746 break;
Tomas Winklerdb086fa2013-05-12 15:34:45 +03001747
Tomas Winkler3c666182015-05-04 09:43:52 +03001748 case MEI_FOP_CONNECT:
1749 case MEI_FOP_DISCONNECT:
Tomas Winkler51678cc2015-07-26 09:54:18 +03001750 case MEI_FOP_NOTIFY_STOP:
1751 case MEI_FOP_NOTIFY_START:
Tomas Winkler3c666182015-05-04 09:43:52 +03001752 if (waitqueue_active(&cl->wait))
1753 wake_up(&cl->wait);
1754
1755 break;
Alexander Usyskin6a8d6482016-04-17 12:16:03 -04001756 case MEI_FOP_DISCONNECT_RSP:
1757 mei_io_cb_free(cb);
1758 mei_cl_set_disconnected(cl);
1759 break;
Tomas Winkler3c666182015-05-04 09:43:52 +03001760 default:
1761 BUG_ON(0);
Tomas Winklerdb086fa2013-05-12 15:34:45 +03001762 }
1763}
1764
Tomas Winkler4234a6d2013-04-08 21:56:37 +03001765
1766/**
Tomas Winkler074b4c02013-02-06 14:06:44 +02001767 * mei_cl_all_disconnect - disconnect forcefully all connected clients
1768 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +03001769 * @dev: mei device
Tomas Winkler074b4c02013-02-06 14:06:44 +02001770 */
Tomas Winkler074b4c02013-02-06 14:06:44 +02001771void mei_cl_all_disconnect(struct mei_device *dev)
1772{
Tomas Winkler31f88f52014-02-17 15:13:25 +02001773 struct mei_cl *cl;
Tomas Winkler074b4c02013-02-06 14:06:44 +02001774
Tomas Winkler3c666182015-05-04 09:43:52 +03001775 list_for_each_entry(cl, &dev->file_list, link)
1776 mei_cl_set_disconnected(cl);
Tomas Winkler074b4c02013-02-06 14:06:44 +02001777}