1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2020 The Linux Foundation. All rights reserved.
4 */
5
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/slab.h>
9 #include <linux/string.h>
10 #include <linux/workqueue.h>
11
12 #include "pdr_internal.h"
13
14 struct pdr_service {
15 char service_name[SERVREG_NAME_LENGTH + 1];
16 char service_path[SERVREG_NAME_LENGTH + 1];
17
18 struct sockaddr_qrtr addr;
19
20 unsigned int instance;
21 unsigned int service;
22 u8 service_data_valid;
23 u32 service_data;
24 int state;
25
26 bool need_notifier_register;
27 bool need_notifier_remove;
28 bool need_locator_lookup;
29 bool service_connected;
30
31 struct list_head node;
32 };
33
34 struct pdr_handle {
35 struct qmi_handle locator_hdl;
36 struct qmi_handle notifier_hdl;
37
38 struct sockaddr_qrtr locator_addr;
39
40 struct list_head lookups;
41 struct list_head indack_list;
42
43 /* control access to pdr lookup/indack lists */
44 struct mutex list_lock;
45
46 /* serialize pd status invocation */
47 struct mutex status_lock;
48
49 /* control access to the locator state */
50 struct mutex lock;
51
52 bool locator_init_complete;
53
54 struct work_struct locator_work;
55 struct work_struct notifier_work;
56 struct work_struct indack_work;
57
58 struct workqueue_struct *notifier_wq;
59 struct workqueue_struct *indack_wq;
60
61 void (*status)(int state, char *service_path, void *priv);
62 void *priv;
63 };
64
65 struct pdr_list_node {
66 enum servreg_service_state curr_state;
67 u16 transaction_id;
68 struct pdr_service *pds;
69 struct list_head node;
70 };
71
pdr_locator_new_server(struct qmi_handle * qmi,struct qmi_service * svc)72 static int pdr_locator_new_server(struct qmi_handle *qmi,
73 struct qmi_service *svc)
74 {
75 struct pdr_handle *pdr = container_of(qmi, struct pdr_handle,
76 locator_hdl);
77 struct pdr_service *pds;
78
79 /* Create a local client port for QMI communication */
80 pdr->locator_addr.sq_family = AF_QIPCRTR;
81 pdr->locator_addr.sq_node = svc->node;
82 pdr->locator_addr.sq_port = svc->port;
83
84 mutex_lock(&pdr->lock);
85 pdr->locator_init_complete = true;
86 mutex_unlock(&pdr->lock);
87
88 /* Service pending lookup requests */
89 mutex_lock(&pdr->list_lock);
90 list_for_each_entry(pds, &pdr->lookups, node) {
91 if (pds->need_locator_lookup)
92 schedule_work(&pdr->locator_work);
93 }
94 mutex_unlock(&pdr->list_lock);
95
96 return 0;
97 }
98
pdr_locator_del_server(struct qmi_handle * qmi,struct qmi_service * svc)99 static void pdr_locator_del_server(struct qmi_handle *qmi,
100 struct qmi_service *svc)
101 {
102 struct pdr_handle *pdr = container_of(qmi, struct pdr_handle,
103 locator_hdl);
104
105 mutex_lock(&pdr->lock);
106 pdr->locator_init_complete = false;
107 mutex_unlock(&pdr->lock);
108
109 pdr->locator_addr.sq_node = 0;
110 pdr->locator_addr.sq_port = 0;
111 }
112
113 static const struct qmi_ops pdr_locator_ops = {
114 .new_server = pdr_locator_new_server,
115 .del_server = pdr_locator_del_server,
116 };
117
pdr_register_listener(struct pdr_handle * pdr,struct pdr_service * pds,bool enable)118 static int pdr_register_listener(struct pdr_handle *pdr,
119 struct pdr_service *pds,
120 bool enable)
121 {
122 struct servreg_register_listener_resp resp;
123 struct servreg_register_listener_req req;
124 struct qmi_txn txn;
125 int ret;
126
127 ret = qmi_txn_init(&pdr->notifier_hdl, &txn,
128 servreg_register_listener_resp_ei,
129 &resp);
130 if (ret < 0)
131 return ret;
132
133 req.enable = enable;
134 strscpy(req.service_path, pds->service_path, sizeof(req.service_path));
135
136 ret = qmi_send_request(&pdr->notifier_hdl, &pds->addr,
137 &txn, SERVREG_REGISTER_LISTENER_REQ,
138 SERVREG_REGISTER_LISTENER_REQ_LEN,
139 servreg_register_listener_req_ei,
140 &req);
141 if (ret < 0) {
142 qmi_txn_cancel(&txn);
143 return ret;
144 }
145
146 ret = qmi_txn_wait(&txn, 5 * HZ);
147 if (ret < 0) {
148 pr_err("PDR: %s register listener txn wait failed: %d\n",
149 pds->service_path, ret);
150 return ret;
151 }
152
153 if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
154 pr_err("PDR: %s register listener failed: 0x%x\n",
155 pds->service_path, resp.resp.error);
156 return -EREMOTEIO;
157 }
158
159 pds->state = resp.curr_state;
160
161 return 0;
162 }
163
pdr_notifier_work(struct work_struct * work)164 static void pdr_notifier_work(struct work_struct *work)
165 {
166 struct pdr_handle *pdr = container_of(work, struct pdr_handle,
167 notifier_work);
168 struct pdr_service *pds;
169 int ret;
170
171 mutex_lock(&pdr->list_lock);
172 list_for_each_entry(pds, &pdr->lookups, node) {
173 if (pds->service_connected) {
174 if (!pds->need_notifier_register)
175 continue;
176
177 pds->need_notifier_register = false;
178 ret = pdr_register_listener(pdr, pds, true);
179 if (ret < 0)
180 pds->state = SERVREG_SERVICE_STATE_DOWN;
181 } else {
182 if (!pds->need_notifier_remove)
183 continue;
184
185 pds->need_notifier_remove = false;
186 pds->state = SERVREG_SERVICE_STATE_DOWN;
187 }
188
189 mutex_lock(&pdr->status_lock);
190 pdr->status(pds->state, pds->service_path, pdr->priv);
191 mutex_unlock(&pdr->status_lock);
192 }
193 mutex_unlock(&pdr->list_lock);
194 }
195
pdr_notifier_new_server(struct qmi_handle * qmi,struct qmi_service * svc)196 static int pdr_notifier_new_server(struct qmi_handle *qmi,
197 struct qmi_service *svc)
198 {
199 struct pdr_handle *pdr = container_of(qmi, struct pdr_handle,
200 notifier_hdl);
201 struct pdr_service *pds;
202
203 mutex_lock(&pdr->list_lock);
204 list_for_each_entry(pds, &pdr->lookups, node) {
205 if (pds->service == svc->service &&
206 pds->instance == svc->instance) {
207 pds->service_connected = true;
208 pds->need_notifier_register = true;
209 pds->addr.sq_family = AF_QIPCRTR;
210 pds->addr.sq_node = svc->node;
211 pds->addr.sq_port = svc->port;
212 queue_work(pdr->notifier_wq, &pdr->notifier_work);
213 }
214 }
215 mutex_unlock(&pdr->list_lock);
216
217 return 0;
218 }
219
pdr_notifier_del_server(struct qmi_handle * qmi,struct qmi_service * svc)220 static void pdr_notifier_del_server(struct qmi_handle *qmi,
221 struct qmi_service *svc)
222 {
223 struct pdr_handle *pdr = container_of(qmi, struct pdr_handle,
224 notifier_hdl);
225 struct pdr_service *pds;
226
227 mutex_lock(&pdr->list_lock);
228 list_for_each_entry(pds, &pdr->lookups, node) {
229 if (pds->service == svc->service &&
230 pds->instance == svc->instance) {
231 pds->service_connected = false;
232 pds->need_notifier_remove = true;
233 pds->addr.sq_node = 0;
234 pds->addr.sq_port = 0;
235 queue_work(pdr->notifier_wq, &pdr->notifier_work);
236 }
237 }
238 mutex_unlock(&pdr->list_lock);
239 }
240
241 static const struct qmi_ops pdr_notifier_ops = {
242 .new_server = pdr_notifier_new_server,
243 .del_server = pdr_notifier_del_server,
244 };
245
pdr_send_indack_msg(struct pdr_handle * pdr,struct pdr_service * pds,u16 tid)246 static int pdr_send_indack_msg(struct pdr_handle *pdr, struct pdr_service *pds,
247 u16 tid)
248 {
249 struct servreg_set_ack_resp resp;
250 struct servreg_set_ack_req req;
251 struct qmi_txn txn;
252 int ret;
253
254 ret = qmi_txn_init(&pdr->notifier_hdl, &txn, servreg_set_ack_resp_ei,
255 &resp);
256 if (ret < 0)
257 return ret;
258
259 req.transaction_id = tid;
260 strscpy(req.service_path, pds->service_path, sizeof(req.service_path));
261
262 ret = qmi_send_request(&pdr->notifier_hdl, &pds->addr,
263 &txn, SERVREG_SET_ACK_REQ,
264 SERVREG_SET_ACK_REQ_LEN,
265 servreg_set_ack_req_ei,
266 &req);
267
268 /* Skip waiting for response */
269 qmi_txn_cancel(&txn);
270 return ret;
271 }
272
pdr_indack_work(struct work_struct * work)273 static void pdr_indack_work(struct work_struct *work)
274 {
275 struct pdr_handle *pdr = container_of(work, struct pdr_handle,
276 indack_work);
277 struct pdr_list_node *ind, *tmp;
278 struct pdr_service *pds;
279
280 list_for_each_entry_safe(ind, tmp, &pdr->indack_list, node) {
281 pds = ind->pds;
282
283 mutex_lock(&pdr->status_lock);
284 pds->state = ind->curr_state;
285 pdr->status(pds->state, pds->service_path, pdr->priv);
286 mutex_unlock(&pdr->status_lock);
287
288 /* Ack the indication after clients release the PD resources */
289 pdr_send_indack_msg(pdr, pds, ind->transaction_id);
290
291 mutex_lock(&pdr->list_lock);
292 list_del(&ind->node);
293 mutex_unlock(&pdr->list_lock);
294
295 kfree(ind);
296 }
297 }
298
pdr_indication_cb(struct qmi_handle * qmi,struct sockaddr_qrtr * sq,struct qmi_txn * txn,const void * data)299 static void pdr_indication_cb(struct qmi_handle *qmi,
300 struct sockaddr_qrtr *sq,
301 struct qmi_txn *txn, const void *data)
302 {
303 struct pdr_handle *pdr = container_of(qmi, struct pdr_handle,
304 notifier_hdl);
305 const struct servreg_state_updated_ind *ind_msg = data;
306 struct pdr_list_node *ind;
307 struct pdr_service *pds = NULL, *iter;
308
309 if (!ind_msg || !ind_msg->service_path[0] ||
310 strlen(ind_msg->service_path) > SERVREG_NAME_LENGTH)
311 return;
312
313 mutex_lock(&pdr->list_lock);
314 list_for_each_entry(iter, &pdr->lookups, node) {
315 if (strcmp(iter->service_path, ind_msg->service_path))
316 continue;
317
318 pds = iter;
319 break;
320 }
321 mutex_unlock(&pdr->list_lock);
322
323 if (!pds)
324 return;
325
326 pr_info("PDR: Indication received from %s, state: 0x%x, trans-id: %d\n",
327 ind_msg->service_path, ind_msg->curr_state,
328 ind_msg->transaction_id);
329
330 ind = kzalloc(sizeof(*ind), GFP_KERNEL);
331 if (!ind)
332 return;
333
334 ind->transaction_id = ind_msg->transaction_id;
335 ind->curr_state = ind_msg->curr_state;
336 ind->pds = pds;
337
338 mutex_lock(&pdr->list_lock);
339 list_add_tail(&ind->node, &pdr->indack_list);
340 mutex_unlock(&pdr->list_lock);
341
342 queue_work(pdr->indack_wq, &pdr->indack_work);
343 }
344
345 static const struct qmi_msg_handler qmi_indication_handler[] = {
346 {
347 .type = QMI_INDICATION,
348 .msg_id = SERVREG_STATE_UPDATED_IND_ID,
349 .ei = servreg_state_updated_ind_ei,
350 .decoded_size = sizeof(struct servreg_state_updated_ind),
351 .fn = pdr_indication_cb,
352 },
353 {}
354 };
355
pdr_get_domain_list(struct servreg_get_domain_list_req * req,struct servreg_get_domain_list_resp * resp,struct pdr_handle * pdr)356 static int pdr_get_domain_list(struct servreg_get_domain_list_req *req,
357 struct servreg_get_domain_list_resp *resp,
358 struct pdr_handle *pdr)
359 {
360 struct qmi_txn txn;
361 int ret;
362
363 ret = qmi_txn_init(&pdr->locator_hdl, &txn,
364 servreg_get_domain_list_resp_ei, resp);
365 if (ret < 0)
366 return ret;
367
368 ret = qmi_send_request(&pdr->locator_hdl,
369 &pdr->locator_addr,
370 &txn, SERVREG_GET_DOMAIN_LIST_REQ,
371 SERVREG_GET_DOMAIN_LIST_REQ_MAX_LEN,
372 servreg_get_domain_list_req_ei,
373 req);
374 if (ret < 0) {
375 qmi_txn_cancel(&txn);
376 return ret;
377 }
378
379 ret = qmi_txn_wait(&txn, 5 * HZ);
380 if (ret < 0) {
381 pr_err("PDR: %s get domain list txn wait failed: %d\n",
382 req->service_name, ret);
383 return ret;
384 }
385
386 if (resp->resp.result != QMI_RESULT_SUCCESS_V01) {
387 pr_err("PDR: %s get domain list failed: 0x%x\n",
388 req->service_name, resp->resp.error);
389 return -EREMOTEIO;
390 }
391
392 return 0;
393 }
394
pdr_locate_service(struct pdr_handle * pdr,struct pdr_service * pds)395 static int pdr_locate_service(struct pdr_handle *pdr, struct pdr_service *pds)
396 {
397 struct servreg_get_domain_list_resp *resp;
398 struct servreg_get_domain_list_req req;
399 struct servreg_location_entry *entry;
400 int domains_read = 0;
401 int ret, i;
402
403 resp = kzalloc(sizeof(*resp), GFP_KERNEL);
404 if (!resp)
405 return -ENOMEM;
406
407 /* Prepare req message */
408 strscpy(req.service_name, pds->service_name, sizeof(req.service_name));
409 req.domain_offset_valid = true;
410 req.domain_offset = 0;
411
412 do {
413 req.domain_offset = domains_read;
414 ret = pdr_get_domain_list(&req, resp, pdr);
415 if (ret < 0)
416 goto out;
417
418 for (i = domains_read; i < resp->domain_list_len; i++) {
419 entry = &resp->domain_list[i];
420
421 if (strnlen(entry->name, sizeof(entry->name)) == sizeof(entry->name))
422 continue;
423
424 if (!strcmp(entry->name, pds->service_path)) {
425 pds->service_data_valid = entry->service_data_valid;
426 pds->service_data = entry->service_data;
427 pds->instance = entry->instance;
428 goto out;
429 }
430 }
431
432 /* Update ret to indicate that the service is not yet found */
433 ret = -ENXIO;
434
435 /* Always read total_domains from the response msg */
436 if (resp->domain_list_len > resp->total_domains)
437 resp->domain_list_len = resp->total_domains;
438
439 domains_read += resp->domain_list_len;
440 } while (domains_read < resp->total_domains);
441 out:
442 kfree(resp);
443 return ret;
444 }
445
pdr_notify_lookup_failure(struct pdr_handle * pdr,struct pdr_service * pds,int err)446 static void pdr_notify_lookup_failure(struct pdr_handle *pdr,
447 struct pdr_service *pds,
448 int err)
449 {
450 pr_err("PDR: service lookup for %s failed: %d\n",
451 pds->service_name, err);
452
453 if (err == -ENXIO)
454 return;
455
456 list_del(&pds->node);
457 pds->state = SERVREG_LOCATOR_ERR;
458 mutex_lock(&pdr->status_lock);
459 pdr->status(pds->state, pds->service_path, pdr->priv);
460 mutex_unlock(&pdr->status_lock);
461 kfree(pds);
462 }
463
pdr_locator_work(struct work_struct * work)464 static void pdr_locator_work(struct work_struct *work)
465 {
466 struct pdr_handle *pdr = container_of(work, struct pdr_handle,
467 locator_work);
468 struct pdr_service *pds, *tmp;
469 int ret = 0;
470
471 /* Bail out early if the SERVREG LOCATOR QMI service is not up */
472 mutex_lock(&pdr->lock);
473 if (!pdr->locator_init_complete) {
474 mutex_unlock(&pdr->lock);
475 pr_debug("PDR: SERVICE LOCATOR service not available\n");
476 return;
477 }
478 mutex_unlock(&pdr->lock);
479
480 mutex_lock(&pdr->list_lock);
481 list_for_each_entry_safe(pds, tmp, &pdr->lookups, node) {
482 if (!pds->need_locator_lookup)
483 continue;
484
485 ret = pdr_locate_service(pdr, pds);
486 if (ret < 0) {
487 pdr_notify_lookup_failure(pdr, pds, ret);
488 continue;
489 }
490
491 ret = qmi_add_lookup(&pdr->notifier_hdl, pds->service, 1,
492 pds->instance);
493 if (ret < 0) {
494 pdr_notify_lookup_failure(pdr, pds, ret);
495 continue;
496 }
497
498 pds->need_locator_lookup = false;
499 }
500 mutex_unlock(&pdr->list_lock);
501 }
502
503 /**
504 * pdr_add_lookup() - register a tracking request for a PD
505 * @pdr: PDR client handle
506 * @service_name: service name of the tracking request
507 * @service_path: service path of the tracking request
508 *
509 * Registering a pdr lookup allows for tracking the life cycle of the PD.
510 *
511 * Return: pdr_service object on success, ERR_PTR on failure. -EALREADY is
512 * returned if a lookup is already in progress for the given service path.
513 */
pdr_add_lookup(struct pdr_handle * pdr,const char * service_name,const char * service_path)514 struct pdr_service *pdr_add_lookup(struct pdr_handle *pdr,
515 const char *service_name,
516 const char *service_path)
517 {
518 struct pdr_service *pds, *tmp;
519 int ret;
520
521 if (IS_ERR_OR_NULL(pdr))
522 return ERR_PTR(-EINVAL);
523
524 if (!service_name || strlen(service_name) > SERVREG_NAME_LENGTH ||
525 !service_path || strlen(service_path) > SERVREG_NAME_LENGTH)
526 return ERR_PTR(-EINVAL);
527
528 pds = kzalloc(sizeof(*pds), GFP_KERNEL);
529 if (!pds)
530 return ERR_PTR(-ENOMEM);
531
532 pds->service = SERVREG_NOTIFIER_SERVICE;
533 strscpy(pds->service_name, service_name, sizeof(pds->service_name));
534 strscpy(pds->service_path, service_path, sizeof(pds->service_path));
535 pds->need_locator_lookup = true;
536
537 mutex_lock(&pdr->list_lock);
538 list_for_each_entry(tmp, &pdr->lookups, node) {
539 if (strcmp(tmp->service_path, service_path))
540 continue;
541
542 mutex_unlock(&pdr->list_lock);
543 ret = -EALREADY;
544 goto err;
545 }
546
547 list_add(&pds->node, &pdr->lookups);
548 mutex_unlock(&pdr->list_lock);
549
550 schedule_work(&pdr->locator_work);
551
552 return pds;
553 err:
554 kfree(pds);
555 return ERR_PTR(ret);
556 }
557 EXPORT_SYMBOL(pdr_add_lookup);
558
559 /**
560 * pdr_restart_pd() - restart PD
561 * @pdr: PDR client handle
562 * @pds: PD service handle
563 *
564 * Restarts the PD tracked by the PDR client handle for a given service path.
565 *
566 * Return: 0 on success, negative errno on failure.
567 */
pdr_restart_pd(struct pdr_handle * pdr,struct pdr_service * pds)568 int pdr_restart_pd(struct pdr_handle *pdr, struct pdr_service *pds)
569 {
570 struct servreg_restart_pd_resp resp;
571 struct servreg_restart_pd_req req = { 0 };
572 struct sockaddr_qrtr addr;
573 struct pdr_service *tmp;
574 struct qmi_txn txn;
575 int ret;
576
577 if (IS_ERR_OR_NULL(pdr) || IS_ERR_OR_NULL(pds))
578 return -EINVAL;
579
580 mutex_lock(&pdr->list_lock);
581 list_for_each_entry(tmp, &pdr->lookups, node) {
582 if (tmp != pds)
583 continue;
584
585 if (!pds->service_connected)
586 break;
587
588 /* Prepare req message */
589 strscpy(req.service_path, pds->service_path, sizeof(req.service_path));
590 addr = pds->addr;
591 break;
592 }
593 mutex_unlock(&pdr->list_lock);
594
595 if (!req.service_path[0])
596 return -EINVAL;
597
598 ret = qmi_txn_init(&pdr->notifier_hdl, &txn,
599 servreg_restart_pd_resp_ei,
600 &resp);
601 if (ret < 0)
602 return ret;
603
604 ret = qmi_send_request(&pdr->notifier_hdl, &addr,
605 &txn, SERVREG_RESTART_PD_REQ,
606 SERVREG_RESTART_PD_REQ_MAX_LEN,
607 servreg_restart_pd_req_ei, &req);
608 if (ret < 0) {
609 qmi_txn_cancel(&txn);
610 return ret;
611 }
612
613 ret = qmi_txn_wait(&txn, 5 * HZ);
614 if (ret < 0) {
615 pr_err("PDR: %s PD restart txn wait failed: %d\n",
616 req.service_path, ret);
617 return ret;
618 }
619
620 /* Check response if PDR is disabled */
621 if (resp.resp.result == QMI_RESULT_FAILURE_V01 &&
622 resp.resp.error == QMI_ERR_DISABLED_V01) {
623 pr_err("PDR: %s PD restart is disabled: 0x%x\n",
624 req.service_path, resp.resp.error);
625 return -EOPNOTSUPP;
626 }
627
628 /* Check the response for other error case*/
629 if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
630 pr_err("PDR: %s request for PD restart failed: 0x%x\n",
631 req.service_path, resp.resp.error);
632 return -EREMOTEIO;
633 }
634
635 return 0;
636 }
637 EXPORT_SYMBOL(pdr_restart_pd);
638
639 /**
640 * pdr_handle_alloc() - initialize the PDR client handle
641 * @status: function to be called on PD state change
642 * @priv: handle for client's use
643 *
644 * Initializes the PDR client handle to allow for tracking/restart of PDs.
645 *
646 * Return: pdr_handle object on success, ERR_PTR on failure.
647 */
pdr_handle_alloc(void (* status)(int state,char * service_path,void * priv),void * priv)648 struct pdr_handle *pdr_handle_alloc(void (*status)(int state,
649 char *service_path,
650 void *priv), void *priv)
651 {
652 struct pdr_handle *pdr;
653 int ret;
654
655 if (!status)
656 return ERR_PTR(-EINVAL);
657
658 pdr = kzalloc(sizeof(*pdr), GFP_KERNEL);
659 if (!pdr)
660 return ERR_PTR(-ENOMEM);
661
662 pdr->status = status;
663 pdr->priv = priv;
664
665 mutex_init(&pdr->status_lock);
666 mutex_init(&pdr->list_lock);
667 mutex_init(&pdr->lock);
668
669 INIT_LIST_HEAD(&pdr->lookups);
670 INIT_LIST_HEAD(&pdr->indack_list);
671
672 INIT_WORK(&pdr->locator_work, pdr_locator_work);
673 INIT_WORK(&pdr->notifier_work, pdr_notifier_work);
674 INIT_WORK(&pdr->indack_work, pdr_indack_work);
675
676 pdr->notifier_wq = create_singlethread_workqueue("pdr_notifier_wq");
677 if (!pdr->notifier_wq) {
678 ret = -ENOMEM;
679 goto free_pdr_handle;
680 }
681
682 pdr->indack_wq = alloc_ordered_workqueue("pdr_indack_wq", WQ_HIGHPRI);
683 if (!pdr->indack_wq) {
684 ret = -ENOMEM;
685 goto destroy_notifier;
686 }
687
688 ret = qmi_handle_init(&pdr->locator_hdl,
689 SERVREG_GET_DOMAIN_LIST_RESP_MAX_LEN,
690 &pdr_locator_ops, NULL);
691 if (ret < 0)
692 goto destroy_indack;
693
694 ret = qmi_add_lookup(&pdr->locator_hdl, SERVREG_LOCATOR_SERVICE, 1, 1);
695 if (ret < 0)
696 goto release_qmi_handle;
697
698 ret = qmi_handle_init(&pdr->notifier_hdl,
699 SERVREG_STATE_UPDATED_IND_MAX_LEN,
700 &pdr_notifier_ops,
701 qmi_indication_handler);
702 if (ret < 0)
703 goto release_qmi_handle;
704
705 return pdr;
706
707 release_qmi_handle:
708 qmi_handle_release(&pdr->locator_hdl);
709 destroy_indack:
710 destroy_workqueue(pdr->indack_wq);
711 destroy_notifier:
712 destroy_workqueue(pdr->notifier_wq);
713 free_pdr_handle:
714 kfree(pdr);
715
716 return ERR_PTR(ret);
717 }
718 EXPORT_SYMBOL(pdr_handle_alloc);
719
720 /**
721 * pdr_handle_release() - release the PDR client handle
722 * @pdr: PDR client handle
723 *
724 * Cleans up pending tracking requests and releases the underlying qmi handles.
725 */
pdr_handle_release(struct pdr_handle * pdr)726 void pdr_handle_release(struct pdr_handle *pdr)
727 {
728 struct pdr_service *pds, *tmp;
729
730 if (IS_ERR_OR_NULL(pdr))
731 return;
732
733 mutex_lock(&pdr->list_lock);
734 list_for_each_entry_safe(pds, tmp, &pdr->lookups, node) {
735 list_del(&pds->node);
736 kfree(pds);
737 }
738 mutex_unlock(&pdr->list_lock);
739
740 cancel_work_sync(&pdr->locator_work);
741 cancel_work_sync(&pdr->notifier_work);
742 cancel_work_sync(&pdr->indack_work);
743
744 destroy_workqueue(pdr->notifier_wq);
745 destroy_workqueue(pdr->indack_wq);
746
747 qmi_handle_release(&pdr->locator_hdl);
748 qmi_handle_release(&pdr->notifier_hdl);
749
750 kfree(pdr);
751 }
752 EXPORT_SYMBOL(pdr_handle_release);
753
754 MODULE_LICENSE("GPL v2");
755 MODULE_DESCRIPTION("Qualcomm Protection Domain Restart helpers");
756