summaryrefslogtreecommitdiffstats
path: root/sound/soc/sof/sof-client-probes.c
blob: 30f771ac7bbf92bb35141e8347dbdd6b524b2412 (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
// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright(c) 2019-2022 Intel Corporation. All rights reserved.
//
// Author: Cezary Rojewski <cezary.rojewski@intel.com>
//
// SOF client support:
//  Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
//  Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
//

#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/string_helpers.h>
#include <linux/stddef.h>

#include <sound/soc.h>
#include <sound/sof/header.h>
#include "sof-client.h"
#include "sof-client-probes.h"

#define SOF_PROBES_SUSPEND_DELAY_MS 3000
/* only extraction supported for now */
#define SOF_PROBES_NUM_DAI_LINKS 1

#define SOF_PROBES_INVALID_NODE_ID UINT_MAX

static bool __read_mostly sof_probes_enabled;
module_param_named(enable, sof_probes_enabled, bool, 0444);
MODULE_PARM_DESC(enable, "Enable SOF probes support");

static int sof_probes_compr_startup(struct snd_compr_stream *cstream,
				    struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = snd_soc_component_get_drvdata(dai->component);
	struct sof_client_dev *cdev = snd_soc_card_get_drvdata(card);
	struct sof_probes_priv *priv = cdev->data;
	const struct sof_probes_host_ops *ops = priv->host_ops;
	int ret;

	if (sof_client_get_fw_state(cdev) == SOF_FW_CRASHED)
		return -ENODEV;

	ret = sof_client_core_module_get(cdev);
	if (ret)
		return ret;

	ret = ops->startup(cdev, cstream, dai, &priv->extractor_stream_tag);
	if (ret) {
		dev_err(dai->dev, "Failed to startup probe stream: %d\n", ret);
		priv->extractor_stream_tag = SOF_PROBES_INVALID_NODE_ID;
		sof_client_core_module_put(cdev);
	}

	return ret;
}

static int sof_probes_compr_shutdown(struct snd_compr_stream *cstream,
				     struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = snd_soc_component_get_drvdata(dai->component);
	struct sof_client_dev *cdev = snd_soc_card_get_drvdata(card);
	struct sof_probes_priv *priv = cdev->data;
	const struct sof_probes_host_ops *ops = priv->host_ops;
	const struct sof_probes_ipc_ops *ipc = priv->ipc_ops;
	struct sof_probe_point_desc *desc;
	size_t num_desc;
	int i, ret;

	/* disconnect all probe points */
	ret = ipc->points_info(cdev, &desc, &num_desc);
	if (ret < 0) {
		dev_err(dai->dev, "Failed to get probe points: %d\n", ret);
		goto exit;
	}

	for (i = 0; i < num_desc; i++)
		ipc->points_remove(cdev, &desc[i].buffer_id, 1);
	kfree(desc);

exit:
	ret = ipc->deinit(cdev);
	if (ret < 0)
		dev_err(dai->dev, "Failed to deinit probe: %d\n", ret);

	priv->extractor_stream_tag = SOF_PROBES_INVALID_NODE_ID;
	snd_compr_free_pages(cstream);

	ret = ops->shutdown(cdev, cstream, dai);

	sof_client_core_module_put(cdev);

	return ret;
}

static int sof_probes_compr_set_params(struct snd_compr_stream *cstream,
				       struct snd_compr_params *params,
				       struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = snd_soc_component_get_drvdata(dai->component);
	struct sof_client_dev *cdev = snd_soc_card_get_drvdata(card);
	struct snd_compr_runtime *rtd = cstream->runtime;
	struct sof_probes_priv *priv = cdev->data;
	const struct sof_probes_host_ops *ops = priv->host_ops;
	const struct sof_probes_ipc_ops *ipc = priv->ipc_ops;
	int ret;

	cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG;
	cstream->dma_buffer.dev.dev = sof_client_get_dma_dev(cdev);
	ret = snd_compr_malloc_pages(cstream, rtd->buffer_size);
	if (ret < 0)
		return ret;

	ret = ops->set_params(cdev, cstream, params, dai);
	if (ret)
		return ret;

	ret = ipc->init(cdev, priv->extractor_stream_tag, rtd->dma_bytes);
	if (ret < 0) {
		dev_err(dai->dev, "Failed to init probe: %d\n", ret);
		return ret;
	}

	return 0;
}

static int sof_probes_compr_trigger(struct snd_compr_stream *cstream, int cmd,
				    struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = snd_soc_component_get_drvdata(dai->component);
	struct sof_client_dev *cdev = snd_soc_card_get_drvdata(card);
	struct sof_probes_priv *priv = cdev->data;
	const struct sof_probes_host_ops *ops = priv->host_ops;

	return ops->trigger(cdev, cstream, cmd, dai);
}

static int sof_probes_compr_pointer(struct snd_compr_stream *cstream,
				    struct snd_compr_tstamp *tstamp,
				    struct snd_soc_dai *dai)
{
	struct snd_soc_card *card = snd_soc_component_get_drvdata(dai->component);
	struct sof_client_dev *cdev = snd_soc_card_get_drvdata(card);
	struct sof_probes_priv *priv = cdev->data;
	const struct sof_probes_host_ops *ops = priv->host_ops;

	return ops->pointer(cdev, cstream, tstamp, dai);
}

static const struct snd_soc_cdai_ops sof_probes_compr_ops = {
	.startup = sof_probes_compr_startup,
	.shutdown = sof_probes_compr_shutdown,
	.set_params = sof_probes_compr_set_params,
	.trigger = sof_probes_compr_trigger,
	.pointer = sof_probes_compr_pointer,
};

static int sof_probes_compr_copy(struct snd_soc_component *component,
				 struct snd_compr_stream *cstream,
				 char __user *buf, size_t count)
{
	struct snd_compr_runtime *rtd = cstream->runtime;
	unsigned int offset, n;
	void *ptr;
	int ret;

	if (count > rtd->buffer_size)
		count = rtd->buffer_size;

	div_u64_rem(rtd->total_bytes_transferred, rtd->buffer_size, &offset);
	ptr = rtd->dma_area + offset;
	n = rtd->buffer_size - offset;

	if (count < n) {
		ret = copy_to_user(buf, ptr, count);
	} else {
		ret = copy_to_user(buf, ptr, n);
		ret += copy_to_user(buf + n, rtd->dma_area, count - n);
	}

	if (ret)
		return count - ret;
	return count;
}

static const struct snd_compress_ops sof_probes_compressed_ops = {
	.copy = sof_probes_compr_copy,
};

static ssize_t sof_probes_dfs_points_read(struct file *file, char __user *to,
					  size_t count, loff_t *ppos)
{
	struct sof_client_dev *cdev = file->private_data;
	struct sof_probes_priv *priv = cdev->data;
	struct device *dev = &cdev->auxdev.dev;
	struct sof_probe_point_desc *desc;
	const struct sof_probes_ipc_ops *ipc = priv->ipc_ops;
	int remaining, offset;
	size_t num_desc;
	char *buf;
	int i, ret, err;

	if (priv->extractor_stream_tag == SOF_PROBES_INVALID_NODE_ID) {
		dev_warn(dev, "no extractor stream running\n");
		return -ENOENT;
	}

	buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	ret = pm_runtime_resume_and_get(dev);
	if (ret < 0 && ret != -EACCES) {
		dev_err_ratelimited(dev, "debugfs read failed to resume %d\n", ret);
		goto exit;
	}

	ret = ipc->points_info(cdev, &desc, &num_desc);
	if (ret < 0)
		goto pm_error;

	for (i = 0; i < num_desc; i++) {
		offset = strlen(buf);
		remaining = PAGE_SIZE - offset;
		ret = snprintf(buf + offset, remaining,
			       "Id: %#010x  Purpose: %u  Node id: %#x\n",
				desc[i].buffer_id, desc[i].purpose, desc[i].stream_tag);
		if (ret < 0 || ret >= remaining) {
			/* truncate the output buffer at the last full line */
			buf[offset] = '\0';
			break;
		}
	}

	ret = simple_read_from_buffer(to, count, ppos, buf, strlen(buf));

	kfree(desc);

pm_error:
	pm_runtime_mark_last_busy(dev);
	err = pm_runtime_put_autosuspend(dev);
	if (err < 0)
		dev_err_ratelimited(dev, "debugfs read failed to idle %d\n", err);

exit:
	kfree(buf);
	return ret;
}

static ssize_t
sof_probes_dfs_points_write(struct file *file, const char __user *from,
			    size_t count, loff_t *ppos)
{
	struct sof_client_dev *cdev = file->private_data;
	struct sof_probes_priv *priv = cdev->data;
	const struct sof_probes_ipc_ops *ipc = priv->ipc_ops;
	struct device *dev = &cdev->auxdev.dev;
	struct sof_probe_point_desc *desc;
	u32 num_elems, *array;
	size_t bytes;
	int ret, err;

	if (priv->extractor_stream_tag == SOF_PROBES_INVALID_NODE_ID) {
		dev_warn(dev, "no extractor stream running\n");
		return -ENOENT;
	}

	ret = parse_int_array_user(from, count, (int **)&array);
	if (ret < 0)
		return ret;

	num_elems = *array;
	bytes = sizeof(*array) * num_elems;
	if (bytes % sizeof(*desc)) {
		ret = -EINVAL;
		goto exit;
	}

	desc = (struct sof_probe_point_desc *)&array[1];

	ret = pm_runtime_resume_and_get(dev);
	if (ret < 0 && ret != -EACCES) {
		dev_err_ratelimited(dev, "debugfs write failed to resume %d\n", ret);
		goto exit;
	}

	ret = ipc->points_add(cdev, desc, bytes / sizeof(*desc));
	if (!ret)
		ret = count;

	pm_runtime_mark_last_busy(dev);
	err = pm_runtime_put_autosuspend(dev);
	if (err < 0)
		dev_err_ratelimited(dev, "debugfs write failed to idle %d\n", err);
exit:
	kfree(array);
	return ret;
}

static const struct file_operations sof_probes_points_fops = {
	.open = simple_open,
	.read = sof_probes_dfs_points_read,
	.write = sof_probes_dfs_points_write,
	.llseek = default_llseek,

	.owner = THIS_MODULE,
};

static ssize_t
sof_probes_dfs_points_remove_write(struct file *file, const char __user *from,
				   size_t count, loff_t *ppos)
{
	struct sof_client_dev *cdev = file->private_data;
	struct sof_probes_priv *priv = cdev->data;
	const struct sof_probes_ipc_ops *ipc = priv->ipc_ops;
	struct device *dev = &cdev->auxdev.dev;
	int ret, err;
	u32 *array;

	if (priv->extractor_stream_tag == SOF_PROBES_INVALID_NODE_ID) {
		dev_warn(dev, "no extractor stream running\n");
		return -ENOENT;
	}

	ret = parse_int_array_user(from, count, (int **)&array);
	if (ret < 0)
		return ret;

	ret = pm_runtime_resume_and_get(dev);
	if (ret < 0) {
		dev_err_ratelimited(dev, "debugfs write failed to resume %d\n", ret);
		goto exit;
	}

	ret = ipc->points_remove(cdev, &array[1], array[0]);
	if (!ret)
		ret = count;

	pm_runtime_mark_last_busy(dev);
	err = pm_runtime_put_autosuspend(dev);
	if (err < 0)
		dev_err_ratelimited(dev, "debugfs write failed to idle %d\n", err);
exit:
	kfree(array);
	return ret;
}

static const struct file_operations sof_probes_points_remove_fops = {
	.open = simple_open,
	.write = sof_probes_dfs_points_remove_write,
	.llseek = default_llseek,

	.owner = THIS_MODULE,
};

static const struct snd_soc_dai_ops sof_probes_dai_ops = {
	.compress_new = snd_soc_new_compress,
};

static struct snd_soc_dai_driver sof_probes_dai_drv[] = {
{
	.name = "Probe Extraction CPU DAI",
	.ops  = &sof_probes_dai_ops,
	.cops = &sof_probes_compr_ops,
	.capture = {
		.stream_name = "Probe Extraction",
		.channels_min = 1,
		.channels_max = 8,
		.rates = SNDRV_PCM_RATE_48000,
		.rate_min = 48000,
		.rate_max = 48000,
	},
},
};

static const struct snd_soc_component_driver sof_probes_component = {
	.name = "sof-probes-component",
	.compress_ops = &sof_probes_compressed_ops,
	.module_get_upon_open = 1,
	.legacy_dai_naming = 1,
};

static int sof_probes_client_probe(struct auxiliary_device *auxdev,
				   const struct auxiliary_device_id *id)
{
	struct sof_client_dev *cdev = auxiliary_dev_to_sof_client_dev(auxdev);
	struct dentry *dfsroot = sof_client_get_debugfs_root(cdev);
	struct device *dev = &auxdev->dev;
	struct snd_soc_dai_link_component platform_component[] = {
		{
			.name = dev_name(dev),
		}
	};
	struct snd_soc_card *card;
	struct sof_probes_priv *priv;
	struct snd_soc_dai_link_component *cpus;
	struct sof_probes_host_ops *ops;
	struct snd_soc_dai_link *links;
	int ret;

	/* do not set up the probes support if it is not enabled */
	if (!sof_probes_enabled)
		return -ENXIO;

	ops = dev_get_platdata(dev);
	if (!ops) {
		dev_err(dev, "missing platform data\n");
		return -ENODEV;
	}
	if (!ops->startup || !ops->shutdown || !ops->set_params || !ops->trigger ||
	    !ops->pointer) {
		dev_err(dev, "missing platform callback(s)\n");
		return -ENODEV;
	}

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->host_ops = ops;

	switch (sof_client_get_ipc_type(cdev)) {
#ifdef CONFIG_SND_SOC_SOF_IPC4
	case SOF_IPC_TYPE_4:
		priv->ipc_ops = &ipc4_probe_ops;
		break;
#endif
#ifdef CONFIG_SND_SOC_SOF_IPC3
	case SOF_IPC_TYPE_3:
		priv->ipc_ops = &ipc3_probe_ops;
		break;
#endif
	default:
		dev_err(dev, "Matching IPC ops not found.");
		return -ENODEV;
	}

	cdev->data = priv;

	/* register probes component driver and dai */
	ret = devm_snd_soc_register_component(dev, &sof_probes_component,
					      sof_probes_dai_drv,
					      ARRAY_SIZE(sof_probes_dai_drv));
	if (ret < 0) {
		dev_err(dev, "failed to register SOF probes DAI driver %d\n", ret);
		return ret;
	}

	/* set client data */
	priv->extractor_stream_tag = SOF_PROBES_INVALID_NODE_ID;

	/* create read-write probes_points debugfs entry */
	priv->dfs_points = debugfs_create_file("probe_points", 0644, dfsroot,
					       cdev, &sof_probes_points_fops);

	/* create read-write probe_points_remove debugfs entry */
	priv->dfs_points_remove = debugfs_create_file("probe_points_remove", 0644,
						      dfsroot, cdev,
						      &sof_probes_points_remove_fops);

	links = devm_kcalloc(dev, SOF_PROBES_NUM_DAI_LINKS, sizeof(*links), GFP_KERNEL);
	cpus = devm_kcalloc(dev, SOF_PROBES_NUM_DAI_LINKS, sizeof(*cpus), GFP_KERNEL);
	if (!links || !cpus) {
		debugfs_remove(priv->dfs_points);
		debugfs_remove(priv->dfs_points_remove);
		return -ENOMEM;
	}

	/* extraction DAI link */
	links[0].name = "Compress Probe Capture";
	links[0].id = 0;
	links[0].cpus = &cpus[0];
	links[0].num_cpus = 1;
	links[0].cpus->dai_name = "Probe Extraction CPU DAI";
	links[0].codecs = &snd_soc_dummy_dlc;
	links[0].num_codecs = 1;
	links[0].platforms = platform_component;
	links[0].num_platforms = ARRAY_SIZE(platform_component);
	links[0].nonatomic = 1;

	card = &priv->card;

	card->dev = dev;
	card->name = "sof-probes";
	card->owner = THIS_MODULE;
	card->num_links = SOF_PROBES_NUM_DAI_LINKS;
	card->dai_link = links;

	/* set idle_bias_off to prevent the core from resuming the card->dev */
	card->dapm.idle_bias_off = true;

	snd_soc_card_set_drvdata(card, cdev);

	ret = devm_snd_soc_register_card(dev, card);
	if (ret < 0) {
		debugfs_remove(priv->dfs_points);
		debugfs_remove(priv->dfs_points_remove);
		dev_err(dev, "Probes card register failed %d\n", ret);
		return ret;
	}

	/* enable runtime PM */
	pm_runtime_set_autosuspend_delay(dev, SOF_PROBES_SUSPEND_DELAY_MS);
	pm_runtime_use_autosuspend(dev);
	pm_runtime_enable(dev);
	pm_runtime_mark_last_busy(dev);
	pm_runtime_idle(dev);

	return 0;
}

static void sof_probes_client_remove(struct auxiliary_device *auxdev)
{
	struct sof_client_dev *cdev = auxiliary_dev_to_sof_client_dev(auxdev);
	struct sof_probes_priv *priv = cdev->data;

	if (!sof_probes_enabled)
		return;

	pm_runtime_disable(&auxdev->dev);
	debugfs_remove(priv->dfs_points);
	debugfs_remove(priv->dfs_points_remove);
}

static const struct auxiliary_device_id sof_probes_client_id_table[] = {
	{ .name = "snd_sof.hda-probes", },
	{ .name = "snd_sof.acp-probes", },
	{},
};
MODULE_DEVICE_TABLE(auxiliary, sof_probes_client_id_table);

/* driver name will be set based on KBUILD_MODNAME */
static struct auxiliary_driver sof_probes_client_drv = {
	.probe = sof_probes_client_probe,
	.remove = sof_probes_client_remove,

	.id_table = sof_probes_client_id_table,
};

module_auxiliary_driver(sof_probes_client_drv);

MODULE_DESCRIPTION("SOF Probes Client Driver");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS(SND_SOC_SOF_CLIENT);