1// SPDX-License-Identifier: GPL-2.0-only
2//
3// Copyright(c) 2022 Intel Corporation
4//
5// Authors: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
6// Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
7//
8
9#include <linux/debugfs.h>
10#include <linux/errno.h>
11#include <linux/list.h>
12#include <linux/module.h>
13#include <linux/mutex.h>
14#include <linux/slab.h>
15#include <sound/sof/ipc4/header.h>
16#include "ops.h"
17#include "sof-client.h"
18#include "sof-priv.h"
19#include "ipc3-priv.h"
20#include "ipc4-priv.h"
21
22/**
23 * struct sof_ipc_event_entry - IPC client event description
24 * @ipc_msg_type: IPC msg type of the event the client is interested
25 * @cdev: sof_client_dev of the requesting client
26 * @callback: Callback function of the client
27 * @list: item in SOF core client event list
28 */
29struct sof_ipc_event_entry {
30 u32 ipc_msg_type;
31 struct sof_client_dev *cdev;
32 sof_client_event_callback callback;
33 struct list_head list;
34};
35
36/**
37 * struct sof_state_event_entry - DSP panic event subscription entry
38 * @cdev: sof_client_dev of the requesting client
39 * @callback: Callback function of the client
40 * @list: item in SOF core client event list
41 */
42struct sof_state_event_entry {
43 struct sof_client_dev *cdev;
44 sof_client_fw_state_callback callback;
45 struct list_head list;
46};
47
48/**
49 * struct sof_client_dev_entry - client device entry for internal management use
50 * @sdev: pointer to SOF core device struct
51 * @list: item in SOF core client dev list
52 * @client_dev: SOF client device
53 */
54struct sof_client_dev_entry {
55 struct snd_sof_dev *sdev;
56 struct list_head list;
57
58 struct sof_client_dev client_dev;
59};
60
61#define cdev_to_centry(cdev) \
62 container_of(cdev, struct sof_client_dev_entry, client_dev)
63
64static void sof_client_auxdev_release(struct device *dev)
65{
66 struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
67 struct sof_client_dev *cdev = auxiliary_dev_to_sof_client_dev(auxdev);
68 struct sof_client_dev_entry *centry = cdev_to_centry(cdev);
69
70 kfree(objp: cdev->auxdev.dev.platform_data);
71 kfree(objp: centry);
72}
73
74static int sof_client_dev_add_data(struct sof_client_dev *cdev, const void *data,
75 size_t size)
76{
77 void *d = NULL;
78
79 if (data) {
80 d = kmemdup(data, size, GFP_KERNEL);
81 if (!d)
82 return -ENOMEM;
83 }
84
85 cdev->auxdev.dev.platform_data = d;
86 return 0;
87}
88
89#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
90static int sof_register_ipc_flood_test(struct snd_sof_dev *sdev)
91{
92 int ret = 0;
93 int i;
94
95 if (sdev->pdata->ipc_type != SOF_IPC_TYPE_3)
96 return 0;
97
98 for (i = 0; i < CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST_NUM; i++) {
99 ret = sof_client_dev_register(sdev, name: "ipc_flood", id: i, NULL, size: 0);
100 if (ret < 0)
101 break;
102 }
103
104 if (ret) {
105 for (; i >= 0; --i)
106 sof_client_dev_unregister(sdev, name: "ipc_flood", id: i);
107 }
108
109 return ret;
110}
111
112static void sof_unregister_ipc_flood_test(struct snd_sof_dev *sdev)
113{
114 int i;
115
116 for (i = 0; i < CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST_NUM; i++)
117 sof_client_dev_unregister(sdev, name: "ipc_flood", id: i);
118}
119#else
120static inline int sof_register_ipc_flood_test(struct snd_sof_dev *sdev)
121{
122 return 0;
123}
124
125static inline void sof_unregister_ipc_flood_test(struct snd_sof_dev *sdev) {}
126#endif /* CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST */
127
128#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_MSG_INJECTOR)
129static int sof_register_ipc_msg_injector(struct snd_sof_dev *sdev)
130{
131 return sof_client_dev_register(sdev, name: "msg_injector", id: 0, NULL, size: 0);
132}
133
134static void sof_unregister_ipc_msg_injector(struct snd_sof_dev *sdev)
135{
136 sof_client_dev_unregister(sdev, name: "msg_injector", id: 0);
137}
138#else
139static inline int sof_register_ipc_msg_injector(struct snd_sof_dev *sdev)
140{
141 return 0;
142}
143
144static inline void sof_unregister_ipc_msg_injector(struct snd_sof_dev *sdev) {}
145#endif /* CONFIG_SND_SOC_SOF_DEBUG_IPC_MSG_INJECTOR */
146
147#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_KERNEL_INJECTOR)
148static int sof_register_ipc_kernel_injector(struct snd_sof_dev *sdev)
149{
150 /* Only IPC3 supported right now */
151 if (sdev->pdata->ipc_type != SOF_IPC_TYPE_3)
152 return 0;
153
154 return sof_client_dev_register(sdev, name: "kernel_injector", id: 0, NULL, size: 0);
155}
156
157static void sof_unregister_ipc_kernel_injector(struct snd_sof_dev *sdev)
158{
159 sof_client_dev_unregister(sdev, name: "kernel_injector", id: 0);
160}
161#else
162static inline int sof_register_ipc_kernel_injector(struct snd_sof_dev *sdev)
163{
164 return 0;
165}
166
167static inline void sof_unregister_ipc_kernel_injector(struct snd_sof_dev *sdev) {}
168#endif /* CONFIG_SND_SOC_SOF_DEBUG_IPC_KERNEL_INJECTOR */
169
170int sof_register_clients(struct snd_sof_dev *sdev)
171{
172 int ret;
173
174 if (sdev->dspless_mode_selected)
175 return 0;
176
177 /* Register platform independent client devices */
178 ret = sof_register_ipc_flood_test(sdev);
179 if (ret) {
180 dev_err(sdev->dev, "IPC flood test client registration failed\n");
181 return ret;
182 }
183
184 ret = sof_register_ipc_msg_injector(sdev);
185 if (ret) {
186 dev_err(sdev->dev, "IPC message injector client registration failed\n");
187 goto err_msg_injector;
188 }
189
190 ret = sof_register_ipc_kernel_injector(sdev);
191 if (ret) {
192 dev_err(sdev->dev, "IPC kernel injector client registration failed\n");
193 goto err_kernel_injector;
194 }
195
196 /* Platform dependent client device registration */
197
198 if (sof_ops(sdev) && sof_ops(sdev)->register_ipc_clients)
199 ret = sof_ops(sdev)->register_ipc_clients(sdev);
200
201 if (!ret)
202 return 0;
203
204 sof_unregister_ipc_kernel_injector(sdev);
205
206err_kernel_injector:
207 sof_unregister_ipc_msg_injector(sdev);
208
209err_msg_injector:
210 sof_unregister_ipc_flood_test(sdev);
211
212 return ret;
213}
214
215void sof_unregister_clients(struct snd_sof_dev *sdev)
216{
217 if (sof_ops(sdev) && sof_ops(sdev)->unregister_ipc_clients)
218 sof_ops(sdev)->unregister_ipc_clients(sdev);
219
220 sof_unregister_ipc_kernel_injector(sdev);
221 sof_unregister_ipc_msg_injector(sdev);
222 sof_unregister_ipc_flood_test(sdev);
223}
224
225int sof_client_dev_register(struct snd_sof_dev *sdev, const char *name, u32 id,
226 const void *data, size_t size)
227{
228 struct sof_client_dev_entry *centry;
229 struct auxiliary_device *auxdev;
230 struct sof_client_dev *cdev;
231 int ret;
232
233 centry = kzalloc(sizeof(*centry), GFP_KERNEL);
234 if (!centry)
235 return -ENOMEM;
236
237 cdev = &centry->client_dev;
238
239 centry->sdev = sdev;
240 auxdev = &cdev->auxdev;
241 auxdev->name = name;
242 auxdev->dev.parent = sdev->dev;
243 auxdev->dev.release = sof_client_auxdev_release;
244 auxdev->id = id;
245
246 ret = sof_client_dev_add_data(cdev, data, size);
247 if (ret < 0)
248 goto err_dev_add_data;
249
250 ret = auxiliary_device_init(auxdev);
251 if (ret < 0) {
252 dev_err(sdev->dev, "failed to initialize client dev %s.%d\n", name, id);
253 goto err_dev_init;
254 }
255
256 ret = auxiliary_device_add(&cdev->auxdev);
257 if (ret < 0) {
258 dev_err(sdev->dev, "failed to add client dev %s.%d\n", name, id);
259 /*
260 * sof_client_auxdev_release() will be invoked to free up memory
261 * allocations through put_device()
262 */
263 auxiliary_device_uninit(auxdev: &cdev->auxdev);
264 return ret;
265 }
266
267 /* add to list of SOF client devices */
268 mutex_lock(&sdev->ipc_client_mutex);
269 list_add(new: &centry->list, head: &sdev->ipc_client_list);
270 mutex_unlock(lock: &sdev->ipc_client_mutex);
271
272 return 0;
273
274err_dev_init:
275 kfree(objp: cdev->auxdev.dev.platform_data);
276
277err_dev_add_data:
278 kfree(objp: centry);
279
280 return ret;
281}
282EXPORT_SYMBOL_NS_GPL(sof_client_dev_register, "SND_SOC_SOF_CLIENT");
283
284void sof_client_dev_unregister(struct snd_sof_dev *sdev, const char *name, u32 id)
285{
286 struct sof_client_dev_entry *centry;
287
288 mutex_lock(&sdev->ipc_client_mutex);
289
290 /*
291 * sof_client_auxdev_release() will be invoked to free up memory
292 * allocations through put_device()
293 */
294 list_for_each_entry(centry, &sdev->ipc_client_list, list) {
295 struct sof_client_dev *cdev = &centry->client_dev;
296
297 if (!strcmp(cdev->auxdev.name, name) && cdev->auxdev.id == id) {
298 list_del(entry: &centry->list);
299 auxiliary_device_delete(auxdev: &cdev->auxdev);
300 auxiliary_device_uninit(auxdev: &cdev->auxdev);
301 break;
302 }
303 }
304
305 mutex_unlock(lock: &sdev->ipc_client_mutex);
306}
307EXPORT_SYMBOL_NS_GPL(sof_client_dev_unregister, "SND_SOC_SOF_CLIENT");
308
309int sof_client_ipc_tx_message(struct sof_client_dev *cdev, void *ipc_msg,
310 void *reply_data, size_t reply_bytes)
311{
312 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
313
314 if (sdev->pdata->ipc_type == SOF_IPC_TYPE_3) {
315 struct sof_ipc_cmd_hdr *hdr = ipc_msg;
316
317 return sof_ipc_tx_message(ipc: sdev->ipc, msg_data: ipc_msg, msg_bytes: hdr->size,
318 reply_data, reply_bytes);
319 } else if (sdev->pdata->ipc_type == SOF_IPC_TYPE_4) {
320 struct sof_ipc4_msg *msg = ipc_msg;
321
322 return sof_ipc_tx_message(ipc: sdev->ipc, msg_data: ipc_msg, msg_bytes: msg->data_size,
323 reply_data, reply_bytes);
324 }
325
326 return -EINVAL;
327}
328EXPORT_SYMBOL_NS_GPL(sof_client_ipc_tx_message, "SND_SOC_SOF_CLIENT");
329
330int sof_client_ipc_rx_message(struct sof_client_dev *cdev, void *ipc_msg, void *msg_buf)
331{
332 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
333
334 if (IS_ENABLED(CONFIG_SND_SOC_SOF_IPC3) &&
335 sdev->pdata->ipc_type == SOF_IPC_TYPE_3) {
336 struct sof_ipc_cmd_hdr *hdr = ipc_msg;
337
338 if (hdr->size < sizeof(hdr)) {
339 dev_err(sdev->dev, "The received message size is invalid\n");
340 return -EINVAL;
341 }
342
343 sof_ipc3_do_rx_work(sdev, hdr: ipc_msg, msg_buf);
344 return 0;
345 }
346
347 return -EOPNOTSUPP;
348}
349EXPORT_SYMBOL_NS_GPL(sof_client_ipc_rx_message, "SND_SOC_SOF_CLIENT");
350
351int sof_client_ipc_set_get_data(struct sof_client_dev *cdev, void *ipc_msg,
352 bool set)
353{
354 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
355
356 if (sdev->pdata->ipc_type == SOF_IPC_TYPE_3) {
357 struct sof_ipc_cmd_hdr *hdr = ipc_msg;
358
359 return sof_ipc_set_get_data(ipc: sdev->ipc, msg_data: ipc_msg, msg_bytes: hdr->size, set);
360 } else if (sdev->pdata->ipc_type == SOF_IPC_TYPE_4) {
361 struct sof_ipc4_msg *msg = ipc_msg;
362
363 return sof_ipc_set_get_data(ipc: sdev->ipc, msg_data: ipc_msg, msg_bytes: msg->data_size,
364 set);
365 }
366
367 return -EINVAL;
368}
369EXPORT_SYMBOL_NS_GPL(sof_client_ipc_set_get_data, "SND_SOC_SOF_CLIENT");
370
371#ifdef CONFIG_SND_SOC_SOF_IPC4
372struct sof_ipc4_fw_module *sof_client_ipc4_find_module(struct sof_client_dev *c, const guid_t *uuid)
373{
374 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev: c);
375
376 if (sdev->pdata->ipc_type == SOF_IPC_TYPE_4)
377 return sof_ipc4_find_module_by_uuid(sdev, uuid);
378 dev_err(sdev->dev, "Only supported with IPC4\n");
379
380 return NULL;
381}
382EXPORT_SYMBOL_NS_GPL(sof_client_ipc4_find_module, "SND_SOC_SOF_CLIENT");
383
384struct snd_sof_widget *sof_client_ipc4_find_swidget_by_id(struct sof_client_dev *cdev,
385 u32 module_id, int instance_id)
386{
387 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
388
389 if (sdev->pdata->ipc_type == SOF_IPC_TYPE_4)
390 return sof_ipc4_find_swidget_by_ids(sdev, module_id, instance_id);
391 dev_err(sdev->dev, "Only supported with IPC4\n");
392
393 return NULL;
394}
395EXPORT_SYMBOL_NS_GPL(sof_client_ipc4_find_swidget_by_id, "SND_SOC_SOF_CLIENT");
396#endif
397
398int sof_suspend_clients(struct snd_sof_dev *sdev, pm_message_t state)
399{
400 const struct auxiliary_driver *adrv;
401 struct sof_client_dev_entry *centry;
402
403 mutex_lock(&sdev->ipc_client_mutex);
404
405 list_for_each_entry(centry, &sdev->ipc_client_list, list) {
406 struct sof_client_dev *cdev = &centry->client_dev;
407
408 /* Skip devices without loaded driver */
409 if (!cdev->auxdev.dev.driver)
410 continue;
411
412 adrv = to_auxiliary_drv(drv: cdev->auxdev.dev.driver);
413 if (adrv->suspend)
414 adrv->suspend(&cdev->auxdev, state);
415 }
416
417 mutex_unlock(lock: &sdev->ipc_client_mutex);
418
419 return 0;
420}
421EXPORT_SYMBOL_NS_GPL(sof_suspend_clients, "SND_SOC_SOF_CLIENT");
422
423int sof_resume_clients(struct snd_sof_dev *sdev)
424{
425 const struct auxiliary_driver *adrv;
426 struct sof_client_dev_entry *centry;
427
428 mutex_lock(&sdev->ipc_client_mutex);
429
430 list_for_each_entry(centry, &sdev->ipc_client_list, list) {
431 struct sof_client_dev *cdev = &centry->client_dev;
432
433 /* Skip devices without loaded driver */
434 if (!cdev->auxdev.dev.driver)
435 continue;
436
437 adrv = to_auxiliary_drv(drv: cdev->auxdev.dev.driver);
438 if (adrv->resume)
439 adrv->resume(&cdev->auxdev);
440 }
441
442 mutex_unlock(lock: &sdev->ipc_client_mutex);
443
444 return 0;
445}
446EXPORT_SYMBOL_NS_GPL(sof_resume_clients, "SND_SOC_SOF_CLIENT");
447
448struct dentry *sof_client_get_debugfs_root(struct sof_client_dev *cdev)
449{
450 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
451
452 return sdev->debugfs_root;
453}
454EXPORT_SYMBOL_NS_GPL(sof_client_get_debugfs_root, "SND_SOC_SOF_CLIENT");
455
456/* DMA buffer allocation in client drivers must use the core SOF device */
457struct device *sof_client_get_dma_dev(struct sof_client_dev *cdev)
458{
459 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
460
461 return sdev->dev;
462}
463EXPORT_SYMBOL_NS_GPL(sof_client_get_dma_dev, "SND_SOC_SOF_CLIENT");
464
465const struct sof_ipc_fw_version *sof_client_get_fw_version(struct sof_client_dev *cdev)
466{
467 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
468
469 return &sdev->fw_ready.version;
470}
471EXPORT_SYMBOL_NS_GPL(sof_client_get_fw_version, "SND_SOC_SOF_CLIENT");
472
473size_t sof_client_get_ipc_max_payload_size(struct sof_client_dev *cdev)
474{
475 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
476
477 return sdev->ipc->max_payload_size;
478}
479EXPORT_SYMBOL_NS_GPL(sof_client_get_ipc_max_payload_size, "SND_SOC_SOF_CLIENT");
480
481enum sof_ipc_type sof_client_get_ipc_type(struct sof_client_dev *cdev)
482{
483 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
484
485 return sdev->pdata->ipc_type;
486}
487EXPORT_SYMBOL_NS_GPL(sof_client_get_ipc_type, "SND_SOC_SOF_CLIENT");
488
489/* module refcount management of SOF core */
490int sof_client_core_module_get(struct sof_client_dev *cdev)
491{
492 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
493
494 if (!try_module_get(module: sdev->dev->driver->owner))
495 return -ENODEV;
496
497 return 0;
498}
499EXPORT_SYMBOL_NS_GPL(sof_client_core_module_get, "SND_SOC_SOF_CLIENT");
500
501void sof_client_core_module_put(struct sof_client_dev *cdev)
502{
503 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
504
505 module_put(module: sdev->dev->driver->owner);
506}
507EXPORT_SYMBOL_NS_GPL(sof_client_core_module_put, "SND_SOC_SOF_CLIENT");
508
509/* IPC event handling */
510void sof_client_ipc_rx_dispatcher(struct snd_sof_dev *sdev, void *msg_buf)
511{
512 struct sof_ipc_event_entry *event;
513 u32 msg_type;
514
515 if (sdev->pdata->ipc_type == SOF_IPC_TYPE_3) {
516 struct sof_ipc_cmd_hdr *hdr = msg_buf;
517
518 msg_type = hdr->cmd & SOF_GLB_TYPE_MASK;
519 } else if (sdev->pdata->ipc_type == SOF_IPC_TYPE_4) {
520 struct sof_ipc4_msg *msg = msg_buf;
521
522 msg_type = SOF_IPC4_NOTIFICATION_TYPE_GET(msg->primary);
523 } else {
524 dev_dbg_once(sdev->dev, "Not supported IPC version: %d\n",
525 sdev->pdata->ipc_type);
526 return;
527 }
528
529 mutex_lock(&sdev->client_event_handler_mutex);
530
531 list_for_each_entry(event, &sdev->ipc_rx_handler_list, list) {
532 if (event->ipc_msg_type == msg_type)
533 event->callback(event->cdev, msg_buf);
534 }
535
536 mutex_unlock(lock: &sdev->client_event_handler_mutex);
537}
538
539int sof_client_register_ipc_rx_handler(struct sof_client_dev *cdev,
540 u32 ipc_msg_type,
541 sof_client_event_callback callback)
542{
543 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
544 struct sof_ipc_event_entry *event;
545
546 if (!callback)
547 return -EINVAL;
548
549 if (sdev->pdata->ipc_type == SOF_IPC_TYPE_3) {
550 if (!(ipc_msg_type & SOF_GLB_TYPE_MASK))
551 return -EINVAL;
552 } else if (sdev->pdata->ipc_type == SOF_IPC_TYPE_4) {
553 if (!(ipc_msg_type & SOF_IPC4_NOTIFICATION_TYPE_MASK))
554 return -EINVAL;
555 } else {
556 dev_warn(sdev->dev, "%s: Not supported IPC version: %d\n",
557 __func__, sdev->pdata->ipc_type);
558 return -EINVAL;
559 }
560
561 event = kmalloc(sizeof(*event), GFP_KERNEL);
562 if (!event)
563 return -ENOMEM;
564
565 event->ipc_msg_type = ipc_msg_type;
566 event->cdev = cdev;
567 event->callback = callback;
568
569 /* add to list of SOF client devices */
570 mutex_lock(&sdev->client_event_handler_mutex);
571 list_add(new: &event->list, head: &sdev->ipc_rx_handler_list);
572 mutex_unlock(lock: &sdev->client_event_handler_mutex);
573
574 return 0;
575}
576EXPORT_SYMBOL_NS_GPL(sof_client_register_ipc_rx_handler, "SND_SOC_SOF_CLIENT");
577
578void sof_client_unregister_ipc_rx_handler(struct sof_client_dev *cdev,
579 u32 ipc_msg_type)
580{
581 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
582 struct sof_ipc_event_entry *event;
583
584 mutex_lock(&sdev->client_event_handler_mutex);
585
586 list_for_each_entry(event, &sdev->ipc_rx_handler_list, list) {
587 if (event->cdev == cdev && event->ipc_msg_type == ipc_msg_type) {
588 list_del(entry: &event->list);
589 kfree(objp: event);
590 break;
591 }
592 }
593
594 mutex_unlock(lock: &sdev->client_event_handler_mutex);
595}
596EXPORT_SYMBOL_NS_GPL(sof_client_unregister_ipc_rx_handler, "SND_SOC_SOF_CLIENT");
597
598/*DSP state notification and query */
599void sof_client_fw_state_dispatcher(struct snd_sof_dev *sdev)
600{
601 struct sof_state_event_entry *event;
602
603 mutex_lock(&sdev->client_event_handler_mutex);
604
605 list_for_each_entry(event, &sdev->fw_state_handler_list, list)
606 event->callback(event->cdev, sdev->fw_state);
607
608 mutex_unlock(lock: &sdev->client_event_handler_mutex);
609}
610
611int sof_client_register_fw_state_handler(struct sof_client_dev *cdev,
612 sof_client_fw_state_callback callback)
613{
614 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
615 struct sof_state_event_entry *event;
616
617 if (!callback)
618 return -EINVAL;
619
620 event = kmalloc(sizeof(*event), GFP_KERNEL);
621 if (!event)
622 return -ENOMEM;
623
624 event->cdev = cdev;
625 event->callback = callback;
626
627 /* add to list of SOF client devices */
628 mutex_lock(&sdev->client_event_handler_mutex);
629 list_add(new: &event->list, head: &sdev->fw_state_handler_list);
630 mutex_unlock(lock: &sdev->client_event_handler_mutex);
631
632 return 0;
633}
634EXPORT_SYMBOL_NS_GPL(sof_client_register_fw_state_handler, "SND_SOC_SOF_CLIENT");
635
636void sof_client_unregister_fw_state_handler(struct sof_client_dev *cdev)
637{
638 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
639 struct sof_state_event_entry *event;
640
641 mutex_lock(&sdev->client_event_handler_mutex);
642
643 list_for_each_entry(event, &sdev->fw_state_handler_list, list) {
644 if (event->cdev == cdev) {
645 list_del(entry: &event->list);
646 kfree(objp: event);
647 break;
648 }
649 }
650
651 mutex_unlock(lock: &sdev->client_event_handler_mutex);
652}
653EXPORT_SYMBOL_NS_GPL(sof_client_unregister_fw_state_handler, "SND_SOC_SOF_CLIENT");
654
655enum sof_fw_state sof_client_get_fw_state(struct sof_client_dev *cdev)
656{
657 struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
658
659 return sdev->fw_state;
660}
661EXPORT_SYMBOL_NS_GPL(sof_client_get_fw_state, "SND_SOC_SOF_CLIENT");
662
663struct snd_sof_dev *sof_client_dev_to_sof_dev(struct sof_client_dev *cdev)
664{
665 struct sof_client_dev_entry *centry = cdev_to_centry(cdev);
666
667 return centry->sdev;
668}
669EXPORT_SYMBOL_NS_GPL(sof_client_dev_to_sof_dev, "SND_SOC_SOF_CLIENT");
670

source code of linux/sound/soc/sof/sof-client.c