summaryrefslogtreecommitdiff
path: root/drivers/misc/mei/hbm.c
blob: 6916045166eb4fda8eb347ff8978aac5c6ca6fc9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
/*
 *
 * Intel Management Engine Interface (Intel MEI) Linux driver
 * Copyright (c) 2003-2012, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */

#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mei.h>

#include "mei_dev.h"
#include "hbm.h"
#include "hw-me.h"

/**
 * mei_hbm_me_cl_allocate - allocates storage for me clients
 *
 * @dev: the device structure
 *
 * returns none.
 */
static void mei_hbm_me_cl_allocate(struct mei_device *dev)
{
	struct mei_me_client *clients;
	int b;

	/* count how many ME clients we have */
	for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX)
		dev->me_clients_num++;

	if (dev->me_clients_num <= 0)
		return;

	kfree(dev->me_clients);
	dev->me_clients = NULL;

	dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%zd.\n",
		dev->me_clients_num * sizeof(struct mei_me_client));
	/* allocate storage for ME clients representation */
	clients = kcalloc(dev->me_clients_num,
			sizeof(struct mei_me_client), GFP_KERNEL);
	if (!clients) {
		dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
		dev->dev_state = MEI_DEV_RESETTING;
		mei_reset(dev, 1);
		return;
	}
	dev->me_clients = clients;
	return;
}

/**
 * mei_hbm_cl_hdr - construct client hbm header
 *
 * @cl: - client
 * @hbm_cmd: host bus message command
 * @buf: buffer for cl header
 * @len: buffer length
 */
static inline
void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
{
	struct mei_hbm_cl_cmd *cmd = buf;

	memset(cmd, 0, len);

	cmd->hbm_cmd = hbm_cmd;
	cmd->host_addr = cl->host_client_id;
	cmd->me_addr = cl->me_client_id;
}

/**
 * same_disconn_addr - tells if they have the same address
 *
 * @file: private data of the file object.
 * @disconn: disconnection request.
 *
 * returns true if addres are same
 */
static inline
bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf)
{
	struct mei_hbm_cl_cmd *cmd = buf;
	return cl->host_client_id == cmd->host_addr &&
		cl->me_client_id == cmd->me_addr;
}


/**
 * is_treat_specially_client - checks if the message belongs
 * to the file private data.
 *
 * @cl: private data of the file object
 * @rs: connect response bus message
 *
 */
static bool is_treat_specially_client(struct mei_cl *cl,
		struct hbm_client_connect_response *rs)
{
	if (mei_hbm_cl_addr_equal(cl, rs)) {
		if (!rs->status) {
			cl->state = MEI_FILE_CONNECTED;
			cl->status = 0;

		} else {
			cl->state = MEI_FILE_DISCONNECTED;
			cl->status = -ENODEV;
		}
		cl->timer_count = 0;

		return true;
	}
	return false;
}

int mei_hbm_start_wait(struct mei_device *dev)
{
	int ret;
	if (dev->hbm_state > MEI_HBM_START)
		return 0;

	mutex_unlock(&dev->device_lock);
	ret = wait_event_interruptible_timeout(dev->wait_recvd_msg,
			dev->hbm_state == MEI_HBM_IDLE ||
			dev->hbm_state > MEI_HBM_START,
			mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT));
	mutex_lock(&dev->device_lock);

	if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) {
		dev->hbm_state = MEI_HBM_IDLE;
		dev_err(&dev->pdev->dev, "wating for mei start failed\n");
		return -ETIMEDOUT;
	}
	return 0;
}

/**
 * mei_hbm_start_req - sends start request message.
 *
 * @dev: the device structure
 */
int mei_hbm_start_req(struct mei_device *dev)
{
	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
	struct hbm_host_version_request *start_req;
	const size_t len = sizeof(struct hbm_host_version_request);

	mei_hbm_hdr(mei_hdr, len);

	/* host start message */
	start_req = (struct hbm_host_version_request *)dev->wr_msg.data;
	memset(start_req, 0, len);
	start_req->hbm_cmd = HOST_START_REQ_CMD;
	start_req->host_version.major_version = HBM_MAJOR_VERSION;
	start_req->host_version.minor_version = HBM_MINOR_VERSION;

	dev->hbm_state = MEI_HBM_IDLE;
	if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
		dev_err(&dev->pdev->dev, "version message writet failed\n");
		dev->dev_state = MEI_DEV_RESETTING;
		mei_reset(dev, 1);
		return -ENODEV;
	}
	dev->hbm_state = MEI_HBM_START;
	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
	return 0;
}

/*
 * mei_hbm_enum_clients_req - sends enumeration client request message.
 *
 * @dev: the device structure
 *
 * returns none.
 */
static void mei_hbm_enum_clients_req(struct mei_device *dev)
{
	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
	struct hbm_host_enum_request *enum_req;
	const size_t len = sizeof(struct hbm_host_enum_request);
	/* enumerate clients */
	mei_hbm_hdr(mei_hdr, len);

	enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;
	memset(enum_req, 0, len);
	enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;

	if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
		dev->dev_state = MEI_DEV_RESETTING;
		dev_err(&dev->pdev->dev, "enumeration request write failed.\n");
		mei_reset(dev, 1);
	}
	dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
	return;
}

/**
 * mei_hbm_prop_req - request property for a single client
 *
 * @dev: the device structure
 *
 * returns none.
 */

static int mei_hbm_prop_req(struct mei_device *dev)
{

	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
	struct hbm_props_request *prop_req;
	const size_t len = sizeof(struct hbm_props_request);
	unsigned long next_client_index;
	u8 client_num;


	client_num = dev->me_client_presentation_num;

	next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX,
					  dev->me_client_index);

	/* We got all client properties */
	if (next_client_index == MEI_CLIENTS_MAX) {
		dev->hbm_state = MEI_HBM_STARTED;
		schedule_work(&dev->init_work);

		return 0;
	}

	dev->me_clients[client_num].client_id = next_client_index;
	dev->me_clients[client_num].mei_flow_ctrl_creds = 0;

	mei_hbm_hdr(mei_hdr, len);
	prop_req = (struct hbm_props_request *)dev->wr_msg.data;

	memset(prop_req, 0, sizeof(struct hbm_props_request));


	prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
	prop_req->address = next_client_index;

	if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
		dev->dev_state = MEI_DEV_RESETTING;
		dev_err(&dev->pdev->dev, "properties request write failed\n");
		mei_reset(dev, 1);

		return -EIO;
	}

	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
	dev->me_client_index = next_client_index;

	return 0;
}

/**
 * mei_hbm_stop_req_prepare - perpare stop request message
 *
 * @dev - mei device
 * @mei_hdr - mei message header
 * @data - hbm message body buffer
 */
static void mei_hbm_stop_req_prepare(struct mei_device *dev,
		struct mei_msg_hdr *mei_hdr, unsigned char *data)
{
	struct hbm_host_stop_request *req =
			(struct hbm_host_stop_request *)data;
	const size_t len = sizeof(struct hbm_host_stop_request);

	mei_hbm_hdr(mei_hdr, len);

	memset(req, 0, len);
	req->hbm_cmd = HOST_STOP_REQ_CMD;
	req->reason = DRIVER_STOP_REQUEST;
}

/**
 * mei_hbm_cl_flow_control_req - sends flow control requst.
 *
 * @dev: the device structure
 * @cl: client info
 *
 * This function returns -EIO on write failure
 */
int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
{
	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
	const size_t len = sizeof(struct hbm_flow_control);

	mei_hbm_hdr(mei_hdr, len);
	mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len);

	dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
		cl->host_client_id, cl->me_client_id);

	return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
}

/**
 * mei_hbm_add_single_flow_creds - adds single buffer credentials.
 *
 * @dev: the device structure
 * @flow: flow control.
 */
static void mei_hbm_add_single_flow_creds(struct mei_device *dev,
				  struct hbm_flow_control *flow)
{
	struct mei_me_client *client;
	int i;

	for (i = 0; i < dev->me_clients_num; i++) {
		client = &dev->me_clients[i];
		if (client && flow->me_addr == client->client_id) {
			if (client->props.single_recv_buf) {
				client->mei_flow_ctrl_creds++;
				dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
				    flow->me_addr);
				dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
				    client->mei_flow_ctrl_creds);
			} else {
				BUG();	/* error in flow control */
			}
		}
	}
}

/**
 * mei_hbm_cl_flow_control_res - flow control response from me
 *
 * @dev: the device structure
 * @flow_control: flow control response bus message
 */
static void mei_hbm_cl_flow_control_res(struct mei_device *dev,
		struct hbm_flow_control *flow_control)
{
	struct mei_cl *cl = NULL;
	struct mei_cl *next = NULL;

	if (!flow_control->host_addr) {
		/* single receive buffer */
		mei_hbm_add_single_flow_creds(dev, flow_control);
		return;
	}

	/* normal connection */
	list_for_each_entry_safe(cl, next, &dev->file_list, link) {
		if (mei_hbm_cl_addr_equal(cl, flow_control)) {
			cl->mei_flow_ctrl_creds++;
			dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n",
				flow_control->host_addr, flow_control->me_addr);
			dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n",
				    cl->mei_flow_ctrl_creds);
				break;
		}
	}
}


/**
 * mei_hbm_cl_disconnect_req - sends disconnect message to fw.
 *
 * @dev: the device structure
 * @cl: a client to disconnect from
 *
 * This function returns -EIO on write failure
 */
int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
{
	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
	const size_t len = sizeof(struct hbm_client_connect_request);

	mei_hbm_hdr(mei_hdr, len);
	mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len);

	return mei_write_message(dev, mei_hdr, dev->wr_msg.data);
}

/**
 * mei_hbm_cl_disconnect_res - disconnect response from ME
 *
 * @dev: the device structure
 * @rs: disconnect response bus message
 */
static void mei_hbm_cl_disconnect_res(struct mei_device *dev,
		struct hbm_client_connect_response *rs)
{
	struct mei_cl *cl;
	struct mei_cl_cb *pos = NULL, *next = NULL;

	dev_dbg(&dev->pdev->dev,
			"disconnect_response:\n"
			"ME Client = %d\n"
			"Host Client = %d\n"
			"Status = %d\n",
			rs->me_addr,
			rs->host_addr,
			rs->status);

	list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {
		cl = pos->cl;

		if (!cl) {
			list_del(&pos->list);
			return;
		}

		dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n");
		if (mei_hbm_cl_addr_equal(cl, rs)) {
			list_del(&pos->list);
			if (!rs->status)
				cl->state = MEI_FILE_DISCONNECTED;

			cl->status = 0;
			cl->timer_count = 0;
			break;
		}
	}
}

/**
 * mei_hbm_cl_connect_req - send connection request to specific me client
 *
 * @dev: the device structure
 * @cl: a client to connect to
 *
 * returns -EIO on write failure
 */
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
{
	struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
	const size_t len = sizeof(struct hbm_client_connect_request);

	mei_hbm_hdr(mei_hdr, len);
	mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len);

	return mei_write_message(dev, mei_hdr,  dev->wr_msg.data);
}

/**
 * mei_hbm_cl_connect_res - connect resposne from the ME
 *
 * @dev: the device structure
 * @rs: connect response bus message
 */
static void mei_hbm_cl_connect_res(struct mei_device *dev,
		struct hbm_client_connect_response *rs)
{

	struct mei_cl *cl;
	struct mei_cl_cb *pos = NULL, *next = NULL;

	dev_dbg(&dev->pdev->dev,
			"connect_response:\n"
			"ME Client = %d\n"
			"Host Client = %d\n"
			"Status = %d\n",
			rs->me_addr,
			rs->host_addr,
			rs->status);

	/* if WD or iamthif client treat specially */

	if (is_treat_specially_client(&dev->wd_cl, rs)) {
		dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n");
		mei_watchdog_register(dev);

		return;
	}

	if (is_treat_specially_client(&dev->iamthif_cl, rs)) {
		dev->iamthif_state = MEI_IAMTHIF_IDLE;
		return;
	}
	list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) {

		cl = pos->cl;
		if (!cl) {
			list_del(&pos->list);
			return;
		}
		if (pos->fop_type == MEI_FOP_IOCTL) {
			if (is_treat_specially_client(cl, rs)) {
				list_del(&pos->list);
				cl->status = 0;
				cl->timer_count = 0;
				break;
			}
		}
	}
}


/**
 * mei_hbm_fw_disconnect_req - disconnect request initiated by me
 *  host sends disoconnect response
 *
 * @dev: the device structure.
 * @disconnect_req: disconnect request bus message from the me
 */
static void mei_hbm_fw_disconnect_req(struct mei_device *dev,
		struct hbm_client_connect_request *disconnect_req)
{
	struct mei_cl *cl, *next;
	const size_t len = sizeof(struct hbm_client_connect_response);

	list_for_each_entry_safe(cl, next, &dev->file_list, link) {
		if (mei_hbm_cl_addr_equal(cl, disconnect_req)) {
			dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n",
					disconnect_req->host_addr,
					disconnect_req->me_addr);
			cl->state = MEI_FILE_DISCONNECTED;
			cl->timer_count = 0;
			if (cl == &dev->wd_cl)
				dev->wd_pending = false;
			else if (cl == &dev->iamthif_cl)
				dev->iamthif_timer = 0;

			/* prepare disconnect response */
			mei_hbm_hdr(&dev->wr_ext_msg.hdr, len);
			mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD,
					 dev->wr_ext_msg.data, len);
			break;
		}
	}
}


/**
 * mei_hbm_dispatch - bottom half read routine after ISR to
 * handle the read bus message cmd processing.
 *
 * @dev: the device structure
 * @mei_hdr: header of bus message
 */
void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
{
	struct mei_bus_message *mei_msg;
	struct mei_me_client *me_client;
	struct hbm_host_version_response *version_res;
	struct hbm_client_connect_response *connect_res;
	struct hbm_client_connect_response *disconnect_res;
	struct hbm_client_connect_request *disconnect_req;
	struct hbm_flow_control *flow_control;
	struct hbm_props_response *props_res;
	struct hbm_host_enum_response *enum_res;

	/* read the message to our buffer */
	BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
	mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
	mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;

	switch (mei_msg->hbm_cmd) {
	case HOST_START_RES_CMD:
		version_res = (struct hbm_host_version_response *)mei_msg;
		if (!version_res->host_version_supported) {
			dev->version = version_res->me_max_version;
			dev_dbg(&dev->pdev->dev, "version mismatch.\n");

			dev->hbm_state = MEI_HBM_STOP;
			mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr,
						dev->wr_msg.data);
			mei_write_message(dev, &dev->wr_msg.hdr,
					dev->wr_msg.data);

			return;
		}

		dev->version.major_version = HBM_MAJOR_VERSION;
		dev->version.minor_version = HBM_MINOR_VERSION;
		if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
		    dev->hbm_state == MEI_HBM_START) {
			dev->init_clients_timer = 0;
			mei_hbm_enum_clients_req(dev);
		} else {
			dev_err(&dev->pdev->dev, "reset: wrong host start response\n");
			mei_reset(dev, 1);
			return;
		}

		wake_up_interruptible(&dev->wait_recvd_msg);
		dev_dbg(&dev->pdev->dev, "host start response message received.\n");
		break;

	case CLIENT_CONNECT_RES_CMD:
		connect_res = (struct hbm_client_connect_response *) mei_msg;
		mei_hbm_cl_connect_res(dev, connect_res);
		dev_dbg(&dev->pdev->dev, "client connect response message received.\n");
		wake_up(&dev->wait_recvd_msg);
		break;

	case CLIENT_DISCONNECT_RES_CMD:
		disconnect_res = (struct hbm_client_connect_response *) mei_msg;
		mei_hbm_cl_disconnect_res(dev, disconnect_res);
		dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n");
		wake_up(&dev->wait_recvd_msg);
		break;

	case MEI_FLOW_CONTROL_CMD:
		flow_control = (struct hbm_flow_control *) mei_msg;
		mei_hbm_cl_flow_control_res(dev, flow_control);
		dev_dbg(&dev->pdev->dev, "client flow control response message received.\n");
		break;

	case HOST_CLIENT_PROPERTIES_RES_CMD:
		props_res = (struct hbm_props_response *)mei_msg;
		me_client = &dev->me_clients[dev->me_client_presentation_num];

		if (props_res->status || !dev->me_clients) {
			dev_err(&dev->pdev->dev, "reset: properties response hbm wrong status.\n");
			mei_reset(dev, 1);
			return;
		}

		if (me_client->client_id != props_res->address) {
			dev_err(&dev->pdev->dev, "reset: host properties response address mismatch\n");
			mei_reset(dev, 1);
			return;
		}

		if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
		    dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
			dev_err(&dev->pdev->dev, "reset: unexpected properties response\n");
			mei_reset(dev, 1);

			return;
		}

		me_client->props = props_res->client_properties;
		dev->me_client_index++;
		dev->me_client_presentation_num++;

		/* request property for the next client */
		mei_hbm_prop_req(dev);

		break;

	case HOST_ENUM_RES_CMD:
		enum_res = (struct hbm_host_enum_response *) mei_msg;
		memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
		if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
		    dev->hbm_state == MEI_HBM_ENUM_CLIENTS) {
				dev->init_clients_timer = 0;
				dev->me_client_presentation_num = 0;
				dev->me_client_index = 0;
				mei_hbm_me_cl_allocate(dev);
				dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;

				/* first property reqeust */
				mei_hbm_prop_req(dev);
		} else {
			dev_err(&dev->pdev->dev, "reset: unexpected enumeration response hbm.\n");
			mei_reset(dev, 1);
			return;
		}
		break;

	case HOST_STOP_RES_CMD:

		if (dev->hbm_state != MEI_HBM_STOP)
			dev_err(&dev->pdev->dev, "unexpected stop response hbm.\n");
		dev->dev_state = MEI_DEV_DISABLED;
		dev_info(&dev->pdev->dev, "reset: FW stop response.\n");
		mei_reset(dev, 1);
		break;

	case CLIENT_DISCONNECT_REQ_CMD:
		/* search for client */
		disconnect_req = (struct hbm_client_connect_request *)mei_msg;
		mei_hbm_fw_disconnect_req(dev, disconnect_req);
		break;

	case ME_STOP_REQ_CMD:

		dev->hbm_state = MEI_HBM_STOP;
		mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr,
					dev->wr_ext_msg.data);
		break;
	default:
		BUG();
		break;

	}
}