summaryrefslogtreecommitdiff
path: root/sound/soc/intel/avs/ipc.c
blob: bdf013c3dd12e2b701e8b17d53470afdbd1f8399 (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
// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
//
// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
//          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
//

#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/slab.h>
#include <sound/hdaudio_ext.h>
#include "avs.h"
#include "messages.h"
#include "registers.h"
#include "trace.h"

#define AVS_IPC_TIMEOUT_MS	300
#define AVS_D0IX_DELAY_MS	300

static int
avs_dsp_set_d0ix(struct avs_dev *adev, bool enable)
{
	struct avs_ipc *ipc = adev->ipc;
	int ret;

	/* Is transition required? */
	if (ipc->in_d0ix == enable)
		return 0;

	ret = avs_dsp_op(adev, set_d0ix, enable);
	if (ret) {
		/* Prevent further d0ix attempts on conscious IPC failure. */
		if (ret == -AVS_EIPC)
			atomic_inc(&ipc->d0ix_disable_depth);

		ipc->in_d0ix = false;
		return ret;
	}

	ipc->in_d0ix = enable;
	return 0;
}

static void avs_dsp_schedule_d0ix(struct avs_dev *adev, struct avs_ipc_msg *tx)
{
	if (atomic_read(&adev->ipc->d0ix_disable_depth))
		return;

	mod_delayed_work(system_power_efficient_wq, &adev->ipc->d0ix_work,
			 msecs_to_jiffies(AVS_D0IX_DELAY_MS));
}

static void avs_dsp_d0ix_work(struct work_struct *work)
{
	struct avs_ipc *ipc = container_of(work, struct avs_ipc, d0ix_work.work);

	avs_dsp_set_d0ix(to_avs_dev(ipc->dev), true);
}

static int avs_dsp_wake_d0i0(struct avs_dev *adev, struct avs_ipc_msg *tx)
{
	struct avs_ipc *ipc = adev->ipc;

	if (!atomic_read(&ipc->d0ix_disable_depth)) {
		cancel_delayed_work_sync(&ipc->d0ix_work);
		return avs_dsp_set_d0ix(adev, false);
	}

	return 0;
}

int avs_dsp_disable_d0ix(struct avs_dev *adev)
{
	struct avs_ipc *ipc = adev->ipc;

	/* Prevent PG only on the first disable. */
	if (atomic_inc_return(&ipc->d0ix_disable_depth) == 1) {
		cancel_delayed_work_sync(&ipc->d0ix_work);
		return avs_dsp_set_d0ix(adev, false);
	}

	return 0;
}

int avs_dsp_enable_d0ix(struct avs_dev *adev)
{
	struct avs_ipc *ipc = adev->ipc;

	if (atomic_dec_and_test(&ipc->d0ix_disable_depth))
		queue_delayed_work(system_power_efficient_wq, &ipc->d0ix_work,
				   msecs_to_jiffies(AVS_D0IX_DELAY_MS));
	return 0;
}

static void avs_dsp_recovery(struct avs_dev *adev)
{
	struct avs_soc_component *acomp;
	unsigned int core_mask;
	int ret;

	mutex_lock(&adev->comp_list_mutex);
	/* disconnect all running streams */
	list_for_each_entry(acomp, &adev->comp_list, node) {
		struct snd_soc_pcm_runtime *rtd;
		struct snd_soc_card *card;

		card = acomp->base.card;
		if (!card)
			continue;

		for_each_card_rtds(card, rtd) {
			struct snd_pcm *pcm;
			int dir;

			pcm = rtd->pcm;
			if (!pcm || rtd->dai_link->no_pcm)
				continue;

			for_each_pcm_streams(dir) {
				struct snd_pcm_substream *substream;

				substream = pcm->streams[dir].substream;
				if (!substream || !substream->runtime)
					continue;

				/* No need for _irq() as we are in nonatomic context. */
				snd_pcm_stream_lock(substream);
				snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
				snd_pcm_stream_unlock(substream);
			}
		}
	}
	mutex_unlock(&adev->comp_list_mutex);

	/* forcibly shutdown all cores */
	core_mask = GENMASK(adev->hw_cfg.dsp_cores - 1, 0);
	avs_dsp_core_disable(adev, core_mask);

	/* attempt dsp reboot */
	ret = avs_dsp_boot_firmware(adev, true);
	if (ret < 0)
		dev_err(adev->dev, "dsp reboot failed: %d\n", ret);

	pm_runtime_mark_last_busy(adev->dev);
	pm_runtime_enable(adev->dev);
	pm_request_autosuspend(adev->dev);

	atomic_set(&adev->ipc->recovering, 0);
}

static void avs_dsp_recovery_work(struct work_struct *work)
{
	struct avs_ipc *ipc = container_of(work, struct avs_ipc, recovery_work);

	avs_dsp_recovery(to_avs_dev(ipc->dev));
}

static void avs_dsp_exception_caught(struct avs_dev *adev, union avs_notify_msg *msg)
{
	struct avs_ipc *ipc = adev->ipc;

	/* Account for the double-exception case. */
	ipc->ready = false;

	if (!atomic_add_unless(&ipc->recovering, 1, 1)) {
		dev_err(adev->dev, "dsp recovery is already in progress\n");
		return;
	}

	dev_crit(adev->dev, "communication severed, rebooting dsp..\n");

	cancel_delayed_work_sync(&ipc->d0ix_work);
	ipc->in_d0ix = false;
	/* Re-enabled on recovery completion. */
	pm_runtime_disable(adev->dev);

	/* Process received notification. */
	avs_dsp_op(adev, coredump, msg);

	schedule_work(&ipc->recovery_work);
}

static void avs_dsp_receive_rx(struct avs_dev *adev, u64 header)
{
	struct avs_ipc *ipc = adev->ipc;
	union avs_reply_msg msg = AVS_MSG(header);
	u64 reg;

	reg = readq(avs_sram_addr(adev, AVS_FW_REGS_WINDOW));
	trace_avs_ipc_reply_msg(header, reg);

	ipc->rx.header = header;
	/* Abort copying payload if request processing was unsuccessful. */
	if (!msg.status) {
		/* update size in case of LARGE_CONFIG_GET */
		if (msg.msg_target == AVS_MOD_MSG &&
		    msg.global_msg_type == AVS_MOD_LARGE_CONFIG_GET)
			ipc->rx.size = min_t(u32, AVS_MAILBOX_SIZE,
					     msg.ext.large_config.data_off_size);

		memcpy_fromio(ipc->rx.data, avs_uplink_addr(adev), ipc->rx.size);
		trace_avs_msg_payload(ipc->rx.data, ipc->rx.size);
	}
}

static void avs_dsp_process_notification(struct avs_dev *adev, u64 header)
{
	struct avs_notify_mod_data mod_data;
	union avs_notify_msg msg = AVS_MSG(header);
	size_t data_size = 0;
	void *data = NULL;
	u64 reg;

	reg = readq(avs_sram_addr(adev, AVS_FW_REGS_WINDOW));
	trace_avs_ipc_notify_msg(header, reg);

	/* Ignore spurious notifications until handshake is established. */
	if (!adev->ipc->ready && msg.notify_msg_type != AVS_NOTIFY_FW_READY) {
		dev_dbg(adev->dev, "FW not ready, skip notification: 0x%08x\n", msg.primary);
		return;
	}

	/* Calculate notification payload size. */
	switch (msg.notify_msg_type) {
	case AVS_NOTIFY_FW_READY:
		break;

	case AVS_NOTIFY_PHRASE_DETECTED:
		data_size = sizeof(struct avs_notify_voice_data);
		break;

	case AVS_NOTIFY_RESOURCE_EVENT:
		data_size = sizeof(struct avs_notify_res_data);
		break;

	case AVS_NOTIFY_LOG_BUFFER_STATUS:
	case AVS_NOTIFY_EXCEPTION_CAUGHT:
		break;

	case AVS_NOTIFY_MODULE_EVENT:
		/* To know the total payload size, header needs to be read first. */
		memcpy_fromio(&mod_data, avs_uplink_addr(adev), sizeof(mod_data));
		data_size = sizeof(mod_data) + mod_data.data_size;
		break;

	default:
		dev_info(adev->dev, "unknown notification: 0x%08x\n", msg.primary);
		break;
	}

	if (data_size) {
		data = kmalloc(data_size, GFP_KERNEL);
		if (!data)
			return;

		memcpy_fromio(data, avs_uplink_addr(adev), data_size);
		trace_avs_msg_payload(data, data_size);
	}

	/* Perform notification-specific operations. */
	switch (msg.notify_msg_type) {
	case AVS_NOTIFY_FW_READY:
		dev_dbg(adev->dev, "FW READY 0x%08x\n", msg.primary);
		adev->ipc->ready = true;
		complete(&adev->fw_ready);
		break;

	case AVS_NOTIFY_LOG_BUFFER_STATUS:
		avs_log_buffer_status_locked(adev, &msg);
		break;

	case AVS_NOTIFY_EXCEPTION_CAUGHT:
		avs_dsp_exception_caught(adev, &msg);
		break;

	default:
		break;
	}

	kfree(data);
}

void avs_dsp_process_response(struct avs_dev *adev, u64 header)
{
	struct avs_ipc *ipc = adev->ipc;

	/*
	 * Response may either be solicited - a reply for a request that has
	 * been sent beforehand - or unsolicited (notification).
	 */
	if (avs_msg_is_reply(header)) {
		/* Response processing is invoked from IRQ thread. */
		spin_lock_irq(&ipc->rx_lock);
		avs_dsp_receive_rx(adev, header);
		ipc->rx_completed = true;
		spin_unlock_irq(&ipc->rx_lock);
	} else {
		avs_dsp_process_notification(adev, header);
	}

	complete(&ipc->busy_completion);
}

irqreturn_t avs_dsp_irq_handler(int irq, void *dev_id)
{
	struct avs_dev *adev = dev_id;
	struct avs_ipc *ipc = adev->ipc;
	u32 adspis, hipc_rsp, hipc_ack;
	irqreturn_t ret = IRQ_NONE;

	adspis = snd_hdac_adsp_readl(adev, AVS_ADSP_REG_ADSPIS);
	if (adspis == UINT_MAX || !(adspis & AVS_ADSP_ADSPIS_IPC))
		return ret;

	hipc_ack = snd_hdac_adsp_readl(adev, SKL_ADSP_REG_HIPCIE);
	hipc_rsp = snd_hdac_adsp_readl(adev, SKL_ADSP_REG_HIPCT);

	/* DSP acked host's request */
	if (hipc_ack & SKL_ADSP_HIPCIE_DONE) {
		/*
		 * As an extra precaution, mask done interrupt. Code executed
		 * due to complete() found below does not assume any masking.
		 */
		snd_hdac_adsp_updatel(adev, SKL_ADSP_REG_HIPCCTL,
				      AVS_ADSP_HIPCCTL_DONE, 0);

		complete(&ipc->done_completion);

		/* tell DSP it has our attention */
		snd_hdac_adsp_updatel(adev, SKL_ADSP_REG_HIPCIE,
				      SKL_ADSP_HIPCIE_DONE,
				      SKL_ADSP_HIPCIE_DONE);
		/* unmask done interrupt */
		snd_hdac_adsp_updatel(adev, SKL_ADSP_REG_HIPCCTL,
				      AVS_ADSP_HIPCCTL_DONE,
				      AVS_ADSP_HIPCCTL_DONE);
		ret = IRQ_HANDLED;
	}

	/* DSP sent new response to process */
	if (hipc_rsp & SKL_ADSP_HIPCT_BUSY) {
		/* mask busy interrupt */
		snd_hdac_adsp_updatel(adev, SKL_ADSP_REG_HIPCCTL,
				      AVS_ADSP_HIPCCTL_BUSY, 0);

		ret = IRQ_WAKE_THREAD;
	}

	return ret;
}

irqreturn_t avs_dsp_irq_thread(int irq, void *dev_id)
{
	struct avs_dev *adev = dev_id;
	union avs_reply_msg msg;
	u32 hipct, hipcte;

	hipct = snd_hdac_adsp_readl(adev, SKL_ADSP_REG_HIPCT);
	hipcte = snd_hdac_adsp_readl(adev, SKL_ADSP_REG_HIPCTE);

	/* ensure DSP sent new response to process */
	if (!(hipct & SKL_ADSP_HIPCT_BUSY))
		return IRQ_NONE;

	msg.primary = hipct;
	msg.ext.val = hipcte;
	avs_dsp_process_response(adev, msg.val);

	/* tell DSP we accepted its message */
	snd_hdac_adsp_updatel(adev, SKL_ADSP_REG_HIPCT,
			      SKL_ADSP_HIPCT_BUSY, SKL_ADSP_HIPCT_BUSY);
	/* unmask busy interrupt */
	snd_hdac_adsp_updatel(adev, SKL_ADSP_REG_HIPCCTL,
			      AVS_ADSP_HIPCCTL_BUSY, AVS_ADSP_HIPCCTL_BUSY);

	return IRQ_HANDLED;
}

static bool avs_ipc_is_busy(struct avs_ipc *ipc)
{
	struct avs_dev *adev = to_avs_dev(ipc->dev);
	u32 hipc_rsp;

	hipc_rsp = snd_hdac_adsp_readl(adev, SKL_ADSP_REG_HIPCT);
	return hipc_rsp & SKL_ADSP_HIPCT_BUSY;
}

static int avs_ipc_wait_busy_completion(struct avs_ipc *ipc, int timeout)
{
	u32 repeats_left = 128; /* to avoid infinite looping */
	int ret;

again:
	ret = wait_for_completion_timeout(&ipc->busy_completion, msecs_to_jiffies(timeout));

	/* DSP could be unresponsive at this point. */
	if (!ipc->ready)
		return -EPERM;

	if (!ret) {
		if (!avs_ipc_is_busy(ipc))
			return -ETIMEDOUT;
		/*
		 * Firmware did its job, either notification or reply
		 * has been received - now wait until it's processed.
		 */
		wait_for_completion_killable(&ipc->busy_completion);
	}

	/* Ongoing notification's bottom-half may cause early wakeup */
	spin_lock(&ipc->rx_lock);
	if (!ipc->rx_completed) {
		if (repeats_left) {
			/* Reply delayed due to notification. */
			repeats_left--;
			reinit_completion(&ipc->busy_completion);
			spin_unlock(&ipc->rx_lock);
			goto again;
		}

		spin_unlock(&ipc->rx_lock);
		return -ETIMEDOUT;
	}

	spin_unlock(&ipc->rx_lock);
	return 0;
}

static void avs_ipc_msg_init(struct avs_ipc *ipc, struct avs_ipc_msg *reply)
{
	lockdep_assert_held(&ipc->rx_lock);

	ipc->rx.header = 0;
	ipc->rx.size = reply ? reply->size : 0;
	ipc->rx_completed = false;

	reinit_completion(&ipc->done_completion);
	reinit_completion(&ipc->busy_completion);
}

static void avs_dsp_send_tx(struct avs_dev *adev, struct avs_ipc_msg *tx, bool read_fwregs)
{
	u64 reg = ULONG_MAX;

	tx->header |= SKL_ADSP_HIPCI_BUSY;
	if (read_fwregs)
		reg = readq(avs_sram_addr(adev, AVS_FW_REGS_WINDOW));

	trace_avs_request(tx, reg);

	if (tx->size)
		memcpy_toio(avs_downlink_addr(adev), tx->data, tx->size);
	snd_hdac_adsp_writel(adev, SKL_ADSP_REG_HIPCIE, tx->header >> 32);
	snd_hdac_adsp_writel(adev, SKL_ADSP_REG_HIPCI, tx->header & UINT_MAX);
}

static int avs_dsp_do_send_msg(struct avs_dev *adev, struct avs_ipc_msg *request,
			       struct avs_ipc_msg *reply, int timeout)
{
	struct avs_ipc *ipc = adev->ipc;
	int ret;

	if (!ipc->ready)
		return -EPERM;

	mutex_lock(&ipc->msg_mutex);

	spin_lock(&ipc->rx_lock);
	avs_ipc_msg_init(ipc, reply);
	avs_dsp_send_tx(adev, request, true);
	spin_unlock(&ipc->rx_lock);

	ret = avs_ipc_wait_busy_completion(ipc, timeout);
	if (ret) {
		if (ret == -ETIMEDOUT) {
			union avs_notify_msg msg = AVS_NOTIFICATION(EXCEPTION_CAUGHT);

			/* Same treatment as on exception, just stack_dump=0. */
			avs_dsp_exception_caught(adev, &msg);
		}
		goto exit;
	}

	ret = ipc->rx.rsp.status;
	if (reply) {
		reply->header = ipc->rx.header;
		reply->size = ipc->rx.size;
		if (reply->data && ipc->rx.size)
			memcpy(reply->data, ipc->rx.data, reply->size);
	}

exit:
	mutex_unlock(&ipc->msg_mutex);
	return ret;
}

static int avs_dsp_send_msg_sequence(struct avs_dev *adev, struct avs_ipc_msg *request,
				     struct avs_ipc_msg *reply, int timeout, bool wake_d0i0,
				     bool schedule_d0ix)
{
	int ret;

	trace_avs_d0ix("wake", wake_d0i0, request->header);
	if (wake_d0i0) {
		ret = avs_dsp_wake_d0i0(adev, request);
		if (ret)
			return ret;
	}

	ret = avs_dsp_do_send_msg(adev, request, reply, timeout);
	if (ret)
		return ret;

	trace_avs_d0ix("schedule", schedule_d0ix, request->header);
	if (schedule_d0ix)
		avs_dsp_schedule_d0ix(adev, request);

	return 0;
}

int avs_dsp_send_msg_timeout(struct avs_dev *adev, struct avs_ipc_msg *request,
			     struct avs_ipc_msg *reply, int timeout)
{
	bool wake_d0i0 = avs_dsp_op(adev, d0ix_toggle, request, true);
	bool schedule_d0ix = avs_dsp_op(adev, d0ix_toggle, request, false);

	return avs_dsp_send_msg_sequence(adev, request, reply, timeout, wake_d0i0, schedule_d0ix);
}

int avs_dsp_send_msg(struct avs_dev *adev, struct avs_ipc_msg *request,
		     struct avs_ipc_msg *reply)
{
	return avs_dsp_send_msg_timeout(adev, request, reply, adev->ipc->default_timeout_ms);
}

int avs_dsp_send_pm_msg_timeout(struct avs_dev *adev, struct avs_ipc_msg *request,
				struct avs_ipc_msg *reply, int timeout, bool wake_d0i0)
{
	return avs_dsp_send_msg_sequence(adev, request, reply, timeout, wake_d0i0, false);
}

int avs_dsp_send_pm_msg(struct avs_dev *adev, struct avs_ipc_msg *request,
			struct avs_ipc_msg *reply, bool wake_d0i0)
{
	return avs_dsp_send_pm_msg_timeout(adev, request, reply, adev->ipc->default_timeout_ms,
					   wake_d0i0);
}

static int avs_dsp_do_send_rom_msg(struct avs_dev *adev, struct avs_ipc_msg *request, int timeout)
{
	struct avs_ipc *ipc = adev->ipc;
	int ret;

	mutex_lock(&ipc->msg_mutex);

	spin_lock(&ipc->rx_lock);
	avs_ipc_msg_init(ipc, NULL);
	/*
	 * with hw still stalled, memory windows may not be
	 * configured properly so avoid accessing SRAM
	 */
	avs_dsp_send_tx(adev, request, false);
	spin_unlock(&ipc->rx_lock);

	/* ROM messages must be sent before main core is unstalled */
	ret = avs_dsp_op(adev, stall, AVS_MAIN_CORE_MASK, false);
	if (!ret) {
		ret = wait_for_completion_timeout(&ipc->done_completion, msecs_to_jiffies(timeout));
		ret = ret ? 0 : -ETIMEDOUT;
	}

	mutex_unlock(&ipc->msg_mutex);

	return ret;
}

int avs_dsp_send_rom_msg_timeout(struct avs_dev *adev, struct avs_ipc_msg *request, int timeout)
{
	return avs_dsp_do_send_rom_msg(adev, request, timeout);
}

int avs_dsp_send_rom_msg(struct avs_dev *adev, struct avs_ipc_msg *request)
{
	return avs_dsp_send_rom_msg_timeout(adev, request, adev->ipc->default_timeout_ms);
}

void avs_dsp_interrupt_control(struct avs_dev *adev, bool enable)
{
	u32 value, mask;

	/*
	 * No particular bit setting order. All of these are required
	 * to have a functional SW <-> FW communication.
	 */
	value = enable ? AVS_ADSP_ADSPIC_IPC : 0;
	snd_hdac_adsp_updatel(adev, AVS_ADSP_REG_ADSPIC, AVS_ADSP_ADSPIC_IPC, value);

	mask = AVS_ADSP_HIPCCTL_DONE | AVS_ADSP_HIPCCTL_BUSY;
	value = enable ? mask : 0;
	snd_hdac_adsp_updatel(adev, SKL_ADSP_REG_HIPCCTL, mask, value);
}

int avs_ipc_init(struct avs_ipc *ipc, struct device *dev)
{
	ipc->rx.data = devm_kzalloc(dev, AVS_MAILBOX_SIZE, GFP_KERNEL);
	if (!ipc->rx.data)
		return -ENOMEM;

	ipc->dev = dev;
	ipc->ready = false;
	ipc->default_timeout_ms = AVS_IPC_TIMEOUT_MS;
	INIT_WORK(&ipc->recovery_work, avs_dsp_recovery_work);
	INIT_DELAYED_WORK(&ipc->d0ix_work, avs_dsp_d0ix_work);
	init_completion(&ipc->done_completion);
	init_completion(&ipc->busy_completion);
	spin_lock_init(&ipc->rx_lock);
	mutex_init(&ipc->msg_mutex);

	return 0;
}

void avs_ipc_block(struct avs_ipc *ipc)
{
	ipc->ready = false;
	cancel_work_sync(&ipc->recovery_work);
	cancel_delayed_work_sync(&ipc->d0ix_work);
	ipc->in_d0ix = false;
}