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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2021 Intel Corporation
6 * Copyright 2023 NXP
7 */
8
9#include <linux/property.h>
10
11#include <net/bluetooth/bluetooth.h>
12#include <net/bluetooth/hci_core.h>
13#include <net/bluetooth/mgmt.h>
14
15#include "hci_codec.h"
16#include "hci_debugfs.h"
17#include "smp.h"
18#include "eir.h"
19#include "msft.h"
20#include "aosp.h"
21#include "leds.h"
22
23static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
24 struct sk_buff *skb)
25{
26 bt_dev_dbg(hdev, "result 0x%2.2x", result);
27
28 if (READ_ONCE(hdev->req_status) != HCI_REQ_PEND)
29 return;
30
31 hdev->req_result = result;
32 WRITE_ONCE(hdev->req_status, HCI_REQ_DONE);
33
34 /* Free the request command so it is not used as response */
35 hci_dev_lock(hdev);
36 kfree_skb(hdev->req_skb);
37 hdev->req_skb = NULL;
38 hci_dev_unlock(hdev);
39
40 if (skb) {
41 struct sock *sk = hci_skb_sk(skb);
42
43 /* Drop sk reference if set */
44 if (sk)
45 sock_put(sk);
46
47 hdev->req_rsp = skb_get(skb);
48 }
49
50 wake_up_interruptible(&hdev->req_wait_q);
51}
52
53struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode, u32 plen,
54 const void *param, struct sock *sk)
55{
56 int len = HCI_COMMAND_HDR_SIZE + plen;
57 struct hci_command_hdr *hdr;
58 struct sk_buff *skb;
59
60 skb = bt_skb_alloc(len, GFP_ATOMIC);
61 if (!skb)
62 return NULL;
63
64 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
65 hdr->opcode = cpu_to_le16(opcode);
66 hdr->plen = plen;
67
68 if (plen)
69 skb_put_data(skb, param, plen);
70
71 bt_dev_dbg(hdev, "skb len %d", skb->len);
72
73 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
74 hci_skb_opcode(skb) = opcode;
75
76 /* Grab a reference if command needs to be associated with a sock (e.g.
77 * likely mgmt socket that initiated the command).
78 */
79 if (sk) {
80 hci_skb_sk(skb) = sk;
81 sock_hold(sk);
82 }
83
84 return skb;
85}
86
87static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
88 const void *param, u8 event, struct sock *sk)
89{
90 struct hci_dev *hdev = req->hdev;
91 struct sk_buff *skb;
92
93 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
94
95 /* If an error occurred during request building, there is no point in
96 * queueing the HCI command. We can simply return.
97 */
98 if (req->err)
99 return;
100
101 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
102 if (!skb) {
103 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
104 opcode);
105 req->err = -ENOMEM;
106 return;
107 }
108
109 if (skb_queue_empty(&req->cmd_q))
110 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
111
112 hci_skb_event(skb) = event;
113
114 skb_queue_tail(&req->cmd_q, skb);
115}
116
117static int hci_req_sync_run(struct hci_request *req)
118{
119 struct hci_dev *hdev = req->hdev;
120 struct sk_buff *skb;
121 unsigned long flags;
122
123 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
124
125 /* If an error occurred during request building, remove all HCI
126 * commands queued on the HCI request queue.
127 */
128 if (req->err) {
129 skb_queue_purge(&req->cmd_q);
130 return req->err;
131 }
132
133 /* Do not allow empty requests */
134 if (skb_queue_empty(&req->cmd_q))
135 return -ENODATA;
136
137 skb = skb_peek_tail(&req->cmd_q);
138 bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
139 bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
140
141 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
142 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
143 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
144
145 queue_work(hdev->workqueue, &hdev->cmd_work);
146
147 return 0;
148}
149
150static void hci_request_init(struct hci_request *req, struct hci_dev *hdev)
151{
152 skb_queue_head_init(&req->cmd_q);
153 req->hdev = hdev;
154 req->err = 0;
155}
156
157/* This function requires the caller holds hdev->req_lock. */
158struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
159 const void *param, u8 event, u32 timeout,
160 struct sock *sk)
161{
162 struct hci_request req;
163 struct sk_buff *skb;
164 int err = 0;
165
166 bt_dev_dbg(hdev, "Opcode 0x%4.4x", opcode);
167
168 hci_request_init(&req, hdev);
169
170 hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
171
172 WRITE_ONCE(hdev->req_status, HCI_REQ_PEND);
173
174 err = hci_req_sync_run(&req);
175 if (err < 0)
176 return ERR_PTR(err);
177
178 err = wait_event_interruptible_timeout(hdev->req_wait_q,
179 READ_ONCE(hdev->req_status) != HCI_REQ_PEND,
180 timeout);
181
182 if (err == -ERESTARTSYS)
183 return ERR_PTR(-EINTR);
184
185 switch (READ_ONCE(hdev->req_status)) {
186 case HCI_REQ_DONE:
187 err = -bt_to_errno(hdev->req_result);
188 break;
189
190 case HCI_REQ_CANCELED:
191 err = -hdev->req_result;
192 break;
193
194 default:
195 err = -ETIMEDOUT;
196 break;
197 }
198
199 WRITE_ONCE(hdev->req_status, 0);
200 hdev->req_result = 0;
201 skb = hdev->req_rsp;
202 hdev->req_rsp = NULL;
203
204 bt_dev_dbg(hdev, "end: err %d", err);
205
206 if (err < 0) {
207 kfree_skb(skb);
208 return ERR_PTR(err);
209 }
210
211 /* If command return a status event skb will be set to NULL as there are
212 * no parameters.
213 */
214 if (!skb)
215 return ERR_PTR(-ENODATA);
216
217 return skb;
218}
219EXPORT_SYMBOL(__hci_cmd_sync_sk);
220
221/* This function requires the caller holds hdev->req_lock. */
222struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
223 const void *param, u32 timeout)
224{
225 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
226}
227EXPORT_SYMBOL(__hci_cmd_sync);
228
229/* Send HCI command and wait for command complete event */
230struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
231 const void *param, u32 timeout)
232{
233 struct sk_buff *skb;
234
235 if (!test_bit(HCI_UP, &hdev->flags))
236 return ERR_PTR(-ENETDOWN);
237
238 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
239
240 hci_req_sync_lock(hdev);
241 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
242 hci_req_sync_unlock(hdev);
243
244 return skb;
245}
246EXPORT_SYMBOL(hci_cmd_sync);
247
248/* This function requires the caller holds hdev->req_lock. */
249struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
250 const void *param, u8 event, u32 timeout)
251{
252 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
253 NULL);
254}
255EXPORT_SYMBOL(__hci_cmd_sync_ev);
256
257/* This function requires the caller holds hdev->req_lock. */
258int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
259 const void *param, u8 event, u32 timeout,
260 struct sock *sk)
261{
262 struct sk_buff *skb;
263 u8 status;
264
265 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
266
267 /* If command return a status event, skb will be set to -ENODATA */
268 if (skb == ERR_PTR(-ENODATA))
269 return 0;
270
271 if (IS_ERR(skb)) {
272 if (!event)
273 bt_dev_err(hdev, "Opcode 0x%4.4x failed: %ld", opcode,
274 PTR_ERR(skb));
275 return PTR_ERR(skb);
276 }
277
278 status = skb->data[0];
279
280 kfree_skb(skb);
281
282 return status;
283}
284EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
285
286int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
287 const void *param, u32 timeout)
288{
289 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
290 NULL);
291}
292EXPORT_SYMBOL(__hci_cmd_sync_status);
293
294int hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
295 const void *param, u32 timeout)
296{
297 int err;
298
299 hci_req_sync_lock(hdev);
300 err = __hci_cmd_sync_status(hdev, opcode, plen, param, timeout);
301 hci_req_sync_unlock(hdev);
302
303 return err;
304}
305EXPORT_SYMBOL(hci_cmd_sync_status);
306
307static void hci_cmd_sync_work(struct work_struct *work)
308{
309 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
310
311 bt_dev_dbg(hdev, "");
312
313 /* Dequeue all entries and run them */
314 while (1) {
315 struct hci_cmd_sync_work_entry *entry;
316
317 /* Leave the backlog to hci_cmd_sync_clear() */
318 if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
319 break;
320
321 mutex_lock(&hdev->cmd_sync_work_lock);
322 entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
323 struct hci_cmd_sync_work_entry,
324 list);
325 if (entry)
326 list_del(&entry->list);
327 mutex_unlock(&hdev->cmd_sync_work_lock);
328
329 if (!entry)
330 break;
331
332 bt_dev_dbg(hdev, "entry %p", entry);
333
334 if (entry->func) {
335 int err;
336
337 hci_req_sync_lock(hdev);
338 err = entry->func(hdev, entry->data);
339 if (entry->destroy)
340 entry->destroy(hdev, entry->data, err);
341 hci_req_sync_unlock(hdev);
342 }
343
344 kfree(entry);
345 }
346}
347
348static void hci_cmd_sync_cancel_work(struct work_struct *work)
349{
350 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
351
352 cancel_delayed_work_sync(&hdev->cmd_timer);
353 cancel_delayed_work_sync(&hdev->ncmd_timer);
354 atomic_set(&hdev->cmd_cnt, 1);
355
356 wake_up_interruptible(&hdev->req_wait_q);
357}
358
359static int hci_scan_disable_sync(struct hci_dev *hdev);
360static int scan_disable_sync(struct hci_dev *hdev, void *data)
361{
362 return hci_scan_disable_sync(hdev);
363}
364
365static int interleaved_inquiry_sync(struct hci_dev *hdev, void *data)
366{
367 return hci_inquiry_sync(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN, 0);
368}
369
370static void le_scan_disable(struct work_struct *work)
371{
372 struct hci_dev *hdev = container_of(work, struct hci_dev,
373 le_scan_disable.work);
374 int status;
375
376 bt_dev_dbg(hdev, "");
377 hci_dev_lock(hdev);
378
379 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
380 goto _return;
381
382 status = hci_cmd_sync_queue(hdev, scan_disable_sync, NULL, NULL);
383 if (status) {
384 bt_dev_err(hdev, "failed to disable LE scan: %d", status);
385 goto _return;
386 }
387
388 /* If we were running LE only scan, change discovery state. If
389 * we were running both LE and BR/EDR inquiry simultaneously,
390 * and BR/EDR inquiry is already finished, stop discovery,
391 * otherwise BR/EDR inquiry will stop discovery when finished.
392 * If we will resolve remote device name, do not change
393 * discovery state.
394 */
395
396 if (hdev->discovery.type == DISCOV_TYPE_LE)
397 goto discov_stopped;
398
399 if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED)
400 goto _return;
401
402 if (hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY)) {
403 if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
404 hdev->discovery.state != DISCOVERY_RESOLVING)
405 goto discov_stopped;
406
407 goto _return;
408 }
409
410 status = hci_cmd_sync_queue(hdev, interleaved_inquiry_sync, NULL, NULL);
411 if (status) {
412 bt_dev_err(hdev, "inquiry failed: status %d", status);
413 goto discov_stopped;
414 }
415
416 goto _return;
417
418discov_stopped:
419 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
420
421_return:
422 hci_dev_unlock(hdev);
423}
424
425static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
426 u8 filter_dup);
427
428static int reenable_adv_sync(struct hci_dev *hdev, void *data)
429{
430 bt_dev_dbg(hdev, "");
431
432 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
433 list_empty(&hdev->adv_instances))
434 return 0;
435
436 if (hdev->cur_adv_instance) {
437 return hci_schedule_adv_instance_sync(hdev,
438 hdev->cur_adv_instance,
439 true);
440 } else {
441 if (ext_adv_capable(hdev)) {
442 hci_start_ext_adv_sync(hdev, 0x00);
443 } else {
444 hci_update_adv_data_sync(hdev, 0x00);
445 hci_update_scan_rsp_data_sync(hdev, 0x00);
446 hci_enable_advertising_sync(hdev);
447 }
448 }
449
450 return 0;
451}
452
453static void reenable_adv(struct work_struct *work)
454{
455 struct hci_dev *hdev = container_of(work, struct hci_dev,
456 reenable_adv_work);
457 int status;
458
459 bt_dev_dbg(hdev, "");
460
461 hci_dev_lock(hdev);
462
463 status = hci_cmd_sync_queue(hdev, reenable_adv_sync, NULL, NULL);
464 if (status)
465 bt_dev_err(hdev, "failed to reenable ADV: %d", status);
466
467 hci_dev_unlock(hdev);
468}
469
470static void cancel_adv_timeout(struct hci_dev *hdev)
471{
472 if (hdev->adv_instance_timeout) {
473 hdev->adv_instance_timeout = 0;
474 cancel_delayed_work(&hdev->adv_instance_expire);
475 }
476}
477
478/* For a single instance:
479 * - force == true: The instance will be removed even when its remaining
480 * lifetime is not zero.
481 * - force == false: the instance will be deactivated but kept stored unless
482 * the remaining lifetime is zero.
483 *
484 * For instance == 0x00:
485 * - force == true: All instances will be removed regardless of their timeout
486 * setting.
487 * - force == false: Only instances that have a timeout will be removed.
488 */
489int hci_clear_adv_instance_sync(struct hci_dev *hdev, struct sock *sk,
490 u8 instance, bool force)
491{
492 struct adv_info *adv_instance, *n, *next_instance = NULL;
493 int err;
494 u8 rem_inst;
495
496 /* Cancel any timeout concerning the removed instance(s). */
497 if (!instance || hdev->cur_adv_instance == instance)
498 cancel_adv_timeout(hdev);
499
500 /* Get the next instance to advertise BEFORE we remove
501 * the current one. This can be the same instance again
502 * if there is only one instance.
503 */
504 if (instance && hdev->cur_adv_instance == instance)
505 next_instance = hci_get_next_instance(hdev, instance);
506
507 if (instance == 0x00) {
508 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances,
509 list) {
510 if (!(force || adv_instance->timeout))
511 continue;
512
513 rem_inst = adv_instance->instance;
514 err = hci_remove_adv_instance(hdev, rem_inst);
515 if (!err)
516 mgmt_advertising_removed(sk, hdev, rem_inst);
517 }
518 } else {
519 adv_instance = hci_find_adv_instance(hdev, instance);
520
521 if (force || (adv_instance && adv_instance->timeout &&
522 !adv_instance->remaining_time)) {
523 /* Don't advertise a removed instance. */
524 if (next_instance &&
525 next_instance->instance == instance)
526 next_instance = NULL;
527
528 err = hci_remove_adv_instance(hdev, instance);
529 if (!err)
530 mgmt_advertising_removed(sk, hdev, instance);
531 }
532 }
533
534 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
535 return 0;
536
537 if (next_instance && !ext_adv_capable(hdev))
538 return hci_schedule_adv_instance_sync(hdev,
539 next_instance->instance,
540 false);
541
542 return 0;
543}
544
545static int adv_timeout_expire_sync(struct hci_dev *hdev, void *data)
546{
547 u8 instance = *(u8 *)data;
548
549 hci_clear_adv_instance_sync(hdev, NULL, instance, false);
550
551 if (list_empty(&hdev->adv_instances))
552 return hci_disable_advertising_sync(hdev);
553
554 return 0;
555}
556
557static void adv_timeout_expire_destroy(struct hci_dev *hdev, void *data,
558 int err)
559{
560 kfree(data);
561}
562
563static void adv_timeout_expire(struct work_struct *work)
564{
565 u8 *inst_ptr;
566 struct hci_dev *hdev = container_of(work, struct hci_dev,
567 adv_instance_expire.work);
568
569 bt_dev_dbg(hdev, "");
570
571 hci_dev_lock(hdev);
572
573 hdev->adv_instance_timeout = 0;
574
575 if (hdev->cur_adv_instance == 0x00)
576 goto unlock;
577
578 inst_ptr = kmalloc(1, GFP_KERNEL);
579 if (!inst_ptr)
580 goto unlock;
581
582 *inst_ptr = hdev->cur_adv_instance;
583 if (hci_cmd_sync_queue(hdev, adv_timeout_expire_sync, inst_ptr,
584 adv_timeout_expire_destroy) < 0)
585 kfree(inst_ptr);
586
587unlock:
588 hci_dev_unlock(hdev);
589}
590
591static bool is_interleave_scanning(struct hci_dev *hdev)
592{
593 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
594}
595
596static int hci_passive_scan_sync(struct hci_dev *hdev);
597
598static void interleave_scan_work(struct work_struct *work)
599{
600 struct hci_dev *hdev = container_of(work, struct hci_dev,
601 interleave_scan.work);
602 unsigned long timeout;
603
604 if (hdev->interleave_scan_state == INTERLEAVE_SCAN_ALLOWLIST) {
605 timeout = msecs_to_jiffies(hdev->advmon_allowlist_duration);
606 } else if (hdev->interleave_scan_state == INTERLEAVE_SCAN_NO_FILTER) {
607 timeout = msecs_to_jiffies(hdev->advmon_no_filter_duration);
608 } else {
609 bt_dev_err(hdev, "unexpected error");
610 return;
611 }
612
613 hci_passive_scan_sync(hdev);
614
615 hci_dev_lock(hdev);
616
617 switch (hdev->interleave_scan_state) {
618 case INTERLEAVE_SCAN_ALLOWLIST:
619 bt_dev_dbg(hdev, "next state: allowlist");
620 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
621 break;
622 case INTERLEAVE_SCAN_NO_FILTER:
623 bt_dev_dbg(hdev, "next state: no filter");
624 hdev->interleave_scan_state = INTERLEAVE_SCAN_ALLOWLIST;
625 break;
626 case INTERLEAVE_SCAN_NONE:
627 bt_dev_err(hdev, "unexpected error");
628 }
629
630 hci_dev_unlock(hdev);
631
632 /* Don't continue interleaving if it was canceled */
633 if (is_interleave_scanning(hdev))
634 queue_delayed_work(hdev->req_workqueue,
635 &hdev->interleave_scan, timeout);
636}
637
638void hci_cmd_sync_init(struct hci_dev *hdev)
639{
640 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
641 INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
642 mutex_init(&hdev->cmd_sync_work_lock);
643 mutex_init(&hdev->unregister_lock);
644
645 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
646 INIT_WORK(&hdev->reenable_adv_work, reenable_adv);
647 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable);
648 INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
649 INIT_DELAYED_WORK(&hdev->interleave_scan, interleave_scan_work);
650}
651
652static void _hci_cmd_sync_cancel_entry(struct hci_dev *hdev,
653 struct hci_cmd_sync_work_entry *entry,
654 int err)
655{
656 if (entry->destroy)
657 entry->destroy(hdev, entry->data, err);
658
659 list_del(&entry->list);
660 kfree(entry);
661}
662
663void hci_cmd_sync_clear(struct hci_dev *hdev)
664{
665 struct hci_cmd_sync_work_entry *entry, *tmp;
666
667 /* cmd_work is disabled, the pending request can only time out */
668 hci_cmd_sync_cancel_sync(hdev, ENODEV);
669 cancel_work_sync(&hdev->cmd_sync_work);
670 cancel_work_sync(&hdev->reenable_adv_work);
671
672 mutex_lock(&hdev->cmd_sync_work_lock);
673 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list)
674 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
675 mutex_unlock(&hdev->cmd_sync_work_lock);
676}
677
678void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
679{
680 bt_dev_dbg(hdev, "err 0x%2.2x", err);
681
682 if (READ_ONCE(hdev->req_status) == HCI_REQ_PEND) {
683 hdev->req_result = err;
684 WRITE_ONCE(hdev->req_status, HCI_REQ_CANCELED);
685
686 queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
687 }
688}
689EXPORT_SYMBOL(hci_cmd_sync_cancel);
690
691/* Cancel ongoing command request synchronously:
692 *
693 * - Set result and mark status to HCI_REQ_CANCELED
694 * - Wakeup command sync thread
695 */
696void hci_cmd_sync_cancel_sync(struct hci_dev *hdev, int err)
697{
698 bt_dev_dbg(hdev, "err 0x%2.2x", err);
699
700 if (READ_ONCE(hdev->req_status) == HCI_REQ_PEND) {
701 /* req_result is __u32 so error must be positive to be properly
702 * propagated.
703 */
704 hdev->req_result = err < 0 ? -err : err;
705 WRITE_ONCE(hdev->req_status, HCI_REQ_CANCELED);
706
707 wake_up_interruptible(&hdev->req_wait_q);
708 }
709}
710EXPORT_SYMBOL(hci_cmd_sync_cancel_sync);
711
712/* Submit HCI command to be run in as cmd_sync_work:
713 *
714 * - hdev must _not_ be unregistered
715 */
716int hci_cmd_sync_submit(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
717 void *data, hci_cmd_sync_work_destroy_t destroy)
718{
719 struct hci_cmd_sync_work_entry *entry;
720 int err = 0;
721
722 mutex_lock(&hdev->unregister_lock);
723 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
724 err = -ENODEV;
725 goto unlock;
726 }
727
728 entry = kmalloc_obj(*entry);
729 if (!entry) {
730 err = -ENOMEM;
731 goto unlock;
732 }
733 entry->func = func;
734 entry->data = data;
735 entry->destroy = destroy;
736
737 mutex_lock(&hdev->cmd_sync_work_lock);
738 list_add_tail(&entry->list, &hdev->cmd_sync_work_list);
739 mutex_unlock(&hdev->cmd_sync_work_lock);
740
741 queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
742
743unlock:
744 mutex_unlock(&hdev->unregister_lock);
745 return err;
746}
747EXPORT_SYMBOL(hci_cmd_sync_submit);
748
749/* Queue HCI command:
750 *
751 * - hdev must be running
752 */
753int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
754 void *data, hci_cmd_sync_work_destroy_t destroy)
755{
756 /* Only queue command if hdev is running which means it had been opened
757 * and is either on init phase or is already up.
758 */
759 if (!test_bit(HCI_RUNNING, &hdev->flags))
760 return -ENETDOWN;
761
762 return hci_cmd_sync_submit(hdev, func, data, destroy);
763}
764EXPORT_SYMBOL(hci_cmd_sync_queue);
765
766static struct hci_cmd_sync_work_entry *
767_hci_cmd_sync_lookup_entry(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
768 void *data, hci_cmd_sync_work_destroy_t destroy)
769{
770 struct hci_cmd_sync_work_entry *entry, *tmp;
771
772 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
773 if (func && entry->func != func)
774 continue;
775
776 if (data && entry->data != data)
777 continue;
778
779 if (destroy && entry->destroy != destroy)
780 continue;
781
782 return entry;
783 }
784
785 return NULL;
786}
787
788/* Queue HCI command entry once:
789 *
790 * - Lookup if an entry already exist and only if it doesn't creates a new entry
791 * and queue it.
792 */
793int hci_cmd_sync_queue_once(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
794 void *data, hci_cmd_sync_work_destroy_t destroy)
795{
796 if (hci_cmd_sync_lookup_entry(hdev, func, data, destroy))
797 return -EEXIST;
798
799 return hci_cmd_sync_queue(hdev, func, data, destroy);
800}
801EXPORT_SYMBOL(hci_cmd_sync_queue_once);
802
803/* Run HCI command:
804 *
805 * - hdev must be running
806 * - if on cmd_sync_work then run immediately otherwise queue
807 */
808int hci_cmd_sync_run(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
809 void *data, hci_cmd_sync_work_destroy_t destroy)
810{
811 /* Only queue command if hdev is running which means it had been opened
812 * and is either on init phase or is already up.
813 */
814 if (!test_bit(HCI_RUNNING, &hdev->flags))
815 return -ENETDOWN;
816
817 /* If on cmd_sync_work then run immediately otherwise queue */
818 if (current_work() == &hdev->cmd_sync_work) {
819 int err;
820
821 err = func(hdev, data);
822 if (destroy)
823 destroy(hdev, data, err);
824
825 return 0;
826 }
827
828 return hci_cmd_sync_submit(hdev, func, data, destroy);
829}
830EXPORT_SYMBOL(hci_cmd_sync_run);
831
832/* Run HCI command entry once:
833 *
834 * - Lookup if an entry already exist and only if it doesn't creates a new entry
835 * and run it.
836 * - if on cmd_sync_work then run immediately otherwise queue
837 */
838int hci_cmd_sync_run_once(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
839 void *data, hci_cmd_sync_work_destroy_t destroy)
840{
841 if (hci_cmd_sync_lookup_entry(hdev, func, data, destroy))
842 return -EEXIST;
843
844 return hci_cmd_sync_run(hdev, func, data, destroy);
845}
846EXPORT_SYMBOL(hci_cmd_sync_run_once);
847
848/* Lookup HCI command entry:
849 *
850 * - Return first entry that matches by function callback or data or
851 * destroy callback.
852 */
853struct hci_cmd_sync_work_entry *
854hci_cmd_sync_lookup_entry(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
855 void *data, hci_cmd_sync_work_destroy_t destroy)
856{
857 struct hci_cmd_sync_work_entry *entry;
858
859 mutex_lock(&hdev->cmd_sync_work_lock);
860 entry = _hci_cmd_sync_lookup_entry(hdev, func, data, destroy);
861 mutex_unlock(&hdev->cmd_sync_work_lock);
862
863 return entry;
864}
865EXPORT_SYMBOL(hci_cmd_sync_lookup_entry);
866
867/* Cancel HCI command entry */
868void hci_cmd_sync_cancel_entry(struct hci_dev *hdev,
869 struct hci_cmd_sync_work_entry *entry)
870{
871 mutex_lock(&hdev->cmd_sync_work_lock);
872 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
873 mutex_unlock(&hdev->cmd_sync_work_lock);
874}
875EXPORT_SYMBOL(hci_cmd_sync_cancel_entry);
876
877/* Dequeue HCI command entry:
878 *
879 * - Lookup and cancel any entry that matches by function callback or data or
880 * destroy callback.
881 */
882bool hci_cmd_sync_dequeue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
883 void *data, hci_cmd_sync_work_destroy_t destroy)
884{
885 struct hci_cmd_sync_work_entry *entry;
886 bool ret = false;
887
888 mutex_lock(&hdev->cmd_sync_work_lock);
889 while ((entry = _hci_cmd_sync_lookup_entry(hdev, func, data,
890 destroy))) {
891 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
892 ret = true;
893 }
894 mutex_unlock(&hdev->cmd_sync_work_lock);
895
896 return ret;
897}
898EXPORT_SYMBOL(hci_cmd_sync_dequeue);
899
900int hci_update_eir_sync(struct hci_dev *hdev)
901{
902 struct hci_cp_write_eir cp;
903
904 bt_dev_dbg(hdev, "");
905
906 if (!hdev_is_powered(hdev))
907 return 0;
908
909 if (!lmp_ext_inq_capable(hdev))
910 return 0;
911
912 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
913 return 0;
914
915 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
916 return 0;
917
918 memset(&cp, 0, sizeof(cp));
919
920 hci_dev_lock(hdev);
921 eir_create(hdev, cp.data);
922
923 if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0) {
924 hci_dev_unlock(hdev);
925 return 0;
926 }
927
928 memcpy(hdev->eir, cp.data, sizeof(cp.data));
929 hci_dev_unlock(hdev);
930
931 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
932 HCI_CMD_TIMEOUT);
933}
934
935static u8 get_service_classes(struct hci_dev *hdev)
936{
937 struct bt_uuid *uuid;
938 u8 val = 0;
939
940 list_for_each_entry(uuid, &hdev->uuids, list)
941 val |= uuid->svc_hint;
942
943 return val;
944}
945
946int hci_update_class_sync(struct hci_dev *hdev)
947{
948 u8 cod[3];
949
950 bt_dev_dbg(hdev, "");
951
952 if (!hdev_is_powered(hdev))
953 return 0;
954
955 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
956 return 0;
957
958 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
959 return 0;
960
961 hci_dev_lock(hdev);
962 cod[0] = hdev->minor_class;
963 cod[1] = hdev->major_class;
964 cod[2] = get_service_classes(hdev);
965
966 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
967 cod[1] |= 0x20;
968
969 if (memcmp(cod, hdev->dev_class, 3) == 0) {
970 hci_dev_unlock(hdev);
971 return 0;
972 }
973
974 hci_dev_unlock(hdev);
975
976 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
977 sizeof(cod), cod, HCI_CMD_TIMEOUT);
978}
979
980static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
981{
982 /* If there is no connection we are OK to advertise. */
983 if (hci_conn_num(hdev, LE_LINK) == 0)
984 return true;
985
986 /* Check le_states if there is any connection in peripheral role. */
987 if (hdev->conn_hash.le_num_peripheral > 0) {
988 /* Peripheral connection state and non connectable mode
989 * bit 20.
990 */
991 if (!connectable && !(hdev->le_states[2] & 0x10))
992 return false;
993
994 /* Peripheral connection state and connectable mode bit 38
995 * and scannable bit 21.
996 */
997 if (connectable && (!(hdev->le_states[4] & 0x40) ||
998 !(hdev->le_states[2] & 0x20)))
999 return false;
1000 }
1001
1002 /* Check le_states if there is any connection in central role. */
1003 if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
1004 /* Central connection state and non connectable mode bit 18. */
1005 if (!connectable && !(hdev->le_states[2] & 0x02))
1006 return false;
1007
1008 /* Central connection state and connectable mode bit 35 and
1009 * scannable 19.
1010 */
1011 if (connectable && (!(hdev->le_states[4] & 0x08) ||
1012 !(hdev->le_states[2] & 0x08)))
1013 return false;
1014 }
1015
1016 return true;
1017}
1018
1019static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
1020{
1021 /* If privacy is not enabled don't use RPA */
1022 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
1023 return false;
1024
1025 /* If basic privacy mode is enabled use RPA */
1026 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
1027 return true;
1028
1029 /* If limited privacy mode is enabled don't use RPA if we're
1030 * both discoverable and bondable.
1031 */
1032 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
1033 hci_dev_test_flag(hdev, HCI_BONDABLE))
1034 return false;
1035
1036 /* We're neither bondable nor discoverable in the limited
1037 * privacy mode, therefore use RPA.
1038 */
1039 return true;
1040}
1041
1042static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
1043{
1044 /* If a random_addr has been set we're advertising or initiating an LE
1045 * connection we can't go ahead and change the random address at this
1046 * time. This is because the eventual initiator address used for the
1047 * subsequently created connection will be undefined (some
1048 * controllers use the new address and others the one we had
1049 * when the operation started).
1050 *
1051 * In this kind of scenario skip the update and let the random
1052 * address be updated at the next cycle.
1053 */
1054 rcu_read_lock();
1055
1056 if (bacmp(&hdev->random_addr, BDADDR_ANY) &&
1057 (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
1058 hci_lookup_le_connect(hdev))) {
1059 bt_dev_dbg(hdev, "Deferring random address update");
1060 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1061 rcu_read_unlock();
1062 return 0;
1063 }
1064
1065 rcu_read_unlock();
1066
1067 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
1068 6, rpa, HCI_CMD_TIMEOUT);
1069}
1070
1071int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
1072 bool rpa, u8 *own_addr_type)
1073{
1074 int err;
1075
1076 /* If privacy is enabled use a resolvable private address. If
1077 * current RPA has expired or there is something else than
1078 * the current RPA in use, then generate a new one.
1079 */
1080 if (rpa) {
1081 /* If Controller supports LL Privacy use own address type is
1082 * 0x03
1083 */
1084 if (ll_privacy_capable(hdev))
1085 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
1086 else
1087 *own_addr_type = ADDR_LE_DEV_RANDOM;
1088
1089 /* Check if RPA is valid */
1090 if (rpa_valid(hdev))
1091 return 0;
1092
1093 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
1094 if (err < 0) {
1095 bt_dev_err(hdev, "failed to generate new RPA");
1096 return err;
1097 }
1098
1099 err = hci_set_random_addr_sync(hdev, &hdev->rpa);
1100 if (err)
1101 return err;
1102
1103 return 0;
1104 }
1105
1106 /* In case of required privacy without resolvable private address,
1107 * use an non-resolvable private address. This is useful for active
1108 * scanning and non-connectable advertising.
1109 */
1110 if (require_privacy) {
1111 bdaddr_t nrpa;
1112
1113 while (true) {
1114 /* The non-resolvable private address is generated
1115 * from random six bytes with the two most significant
1116 * bits cleared.
1117 */
1118 get_random_bytes(&nrpa, 6);
1119 nrpa.b[5] &= 0x3f;
1120
1121 /* The non-resolvable private address shall not be
1122 * equal to the public address.
1123 */
1124 if (bacmp(&hdev->bdaddr, &nrpa))
1125 break;
1126 }
1127
1128 *own_addr_type = ADDR_LE_DEV_RANDOM;
1129
1130 return hci_set_random_addr_sync(hdev, &nrpa);
1131 }
1132
1133 /* If forcing static address is in use or there is no public
1134 * address use the static address as random address (but skip
1135 * the HCI command if the current random address is already the
1136 * static one.
1137 *
1138 * In case BR/EDR has been disabled on a dual-mode controller
1139 * and a static address has been configured, then use that
1140 * address instead of the public BR/EDR address.
1141 */
1142 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
1143 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
1144 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
1145 bacmp(&hdev->static_addr, BDADDR_ANY))) {
1146 *own_addr_type = ADDR_LE_DEV_RANDOM;
1147 if (bacmp(&hdev->static_addr, &hdev->random_addr))
1148 return hci_set_random_addr_sync(hdev,
1149 &hdev->static_addr);
1150 return 0;
1151 }
1152
1153 /* Neither privacy nor static address is being used so use a
1154 * public address.
1155 */
1156 *own_addr_type = ADDR_LE_DEV_PUBLIC;
1157
1158 return 0;
1159}
1160
1161static int hci_disable_ext_adv_legacy_instance_sync(struct hci_dev *hdev)
1162{
1163 struct hci_cp_le_set_ext_adv_enable *cp;
1164 struct hci_cp_ext_adv_set *set;
1165 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1166 u8 size;
1167
1168 if (!hci_dev_test_flag(hdev, HCI_LE_ADV_0))
1169 return 0;
1170
1171 memset(data, 0, sizeof(data));
1172
1173 cp = (void *)data;
1174 set = (void *)cp->data;
1175
1176 cp->num_of_sets = 0x01;
1177 cp->enable = 0x00;
1178
1179 set->handle = 0x00;
1180
1181 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
1182
1183 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1184 size, data, HCI_CMD_TIMEOUT);
1185}
1186
1187static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1188{
1189 struct hci_cp_le_set_ext_adv_enable *cp;
1190 struct hci_cp_ext_adv_set *set;
1191 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1192 u8 size;
1193 struct adv_info *adv = NULL;
1194
1195 /* If request specifies an instance that doesn't exist, fail */
1196 if (instance > 0) {
1197 adv = hci_find_adv_instance(hdev, instance);
1198 if (!adv)
1199 return -EINVAL;
1200
1201 /* If not enabled there is nothing to do */
1202 if (!adv->enabled)
1203 return 0;
1204 }
1205
1206 memset(data, 0, sizeof(data));
1207
1208 cp = (void *)data;
1209 set = (void *)cp->data;
1210
1211 /* Instance 0x00 indicates all advertising instances will be disabled */
1212 cp->num_of_sets = !!instance;
1213 cp->enable = 0x00;
1214
1215 set->handle = adv ? adv->handle : instance;
1216
1217 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
1218
1219 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1220 size, data, HCI_CMD_TIMEOUT);
1221}
1222
1223static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
1224 bdaddr_t *random_addr)
1225{
1226 struct hci_cp_le_set_adv_set_rand_addr cp;
1227 int err;
1228
1229 if (!instance) {
1230 /* Instance 0x00 doesn't have an adv_info, instead it uses
1231 * hdev->random_addr to track its address so whenever it needs
1232 * to be updated this also set the random address since
1233 * hdev->random_addr is shared with scan state machine.
1234 */
1235 err = hci_set_random_addr_sync(hdev, random_addr);
1236 if (err)
1237 return err;
1238 }
1239
1240 memset(&cp, 0, sizeof(cp));
1241
1242 cp.handle = instance;
1243 bacpy(&cp.bdaddr, random_addr);
1244
1245 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
1246 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1247}
1248
1249static int
1250hci_set_ext_adv_params_sync(struct hci_dev *hdev, u8 instance,
1251 const struct hci_cp_le_set_ext_adv_params *cp,
1252 struct hci_rp_le_set_ext_adv_params *rp)
1253{
1254 struct adv_info *adv;
1255 struct sk_buff *skb;
1256
1257 skb = __hci_cmd_sync(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(*cp),
1258 cp, HCI_CMD_TIMEOUT);
1259
1260 /* If command return a status event, skb will be set to -ENODATA */
1261 if (skb == ERR_PTR(-ENODATA))
1262 return 0;
1263
1264 if (IS_ERR(skb)) {
1265 bt_dev_err(hdev, "Opcode 0x%4.4x failed: %ld",
1266 HCI_OP_LE_SET_EXT_ADV_PARAMS, PTR_ERR(skb));
1267 return PTR_ERR(skb);
1268 }
1269
1270 if (skb->len != sizeof(*rp)) {
1271 bt_dev_err(hdev, "Invalid response length for 0x%4.4x: %u",
1272 HCI_OP_LE_SET_EXT_ADV_PARAMS, skb->len);
1273 kfree_skb(skb);
1274 return -EIO;
1275 }
1276
1277 memcpy(rp, skb->data, sizeof(*rp));
1278 kfree_skb(skb);
1279
1280 if (!rp->status) {
1281 hdev->adv_addr_type = cp->own_addr_type;
1282 if (!instance) {
1283 /* Store in hdev for instance 0 */
1284 hdev->adv_tx_power = rp->tx_power;
1285 } else {
1286 hci_dev_lock(hdev);
1287 adv = hci_find_adv_instance(hdev, instance);
1288 if (adv)
1289 adv->tx_power = rp->tx_power;
1290 hci_dev_unlock(hdev);
1291 }
1292 }
1293
1294 return rp->status;
1295}
1296
1297static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1298 __context_unsafe(/* conditional locking */)
1299{
1300 DEFINE_FLEX(struct hci_cp_le_set_ext_adv_data, pdu, data, length,
1301 HCI_MAX_EXT_AD_LENGTH);
1302 u8 len;
1303 struct adv_info *adv = NULL;
1304 int err;
1305
1306 if (instance) {
1307 hci_dev_lock(hdev);
1308
1309 adv = hci_find_adv_instance(hdev, instance);
1310 if (!adv || !adv->adv_data_changed) {
1311 hci_dev_unlock(hdev);
1312 return 0;
1313 }
1314 }
1315
1316 len = eir_create_adv_data(hdev, instance, pdu->data,
1317 HCI_MAX_EXT_AD_LENGTH);
1318
1319 pdu->length = len;
1320 pdu->handle = adv ? adv->handle : instance;
1321 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1322 pdu->frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1323
1324 if (adv) {
1325 adv->adv_data_changed = false;
1326 hci_dev_unlock(hdev);
1327 }
1328
1329 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1330 struct_size(pdu, data, len), pdu,
1331 HCI_CMD_TIMEOUT);
1332 if (err) {
1333 if (instance) {
1334 hci_dev_lock(hdev);
1335 adv = hci_find_adv_instance(hdev, instance);
1336 if (adv)
1337 adv->adv_data_changed = true;
1338 hci_dev_unlock(hdev);
1339 }
1340
1341 return err;
1342 }
1343
1344 if (!instance) {
1345 memcpy(hdev->adv_data, pdu->data, len);
1346 hdev->adv_data_len = len;
1347 }
1348
1349 return 0;
1350}
1351
1352static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1353{
1354 struct hci_cp_le_set_adv_data cp;
1355 u8 len;
1356
1357 memset(&cp, 0, sizeof(cp));
1358
1359 len = eir_create_adv_data(hdev, instance, cp.data, sizeof(cp.data));
1360
1361 /* There's nothing to do if the data hasn't changed */
1362 if (hdev->adv_data_len == len &&
1363 memcmp(cp.data, hdev->adv_data, len) == 0)
1364 return 0;
1365
1366 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1367 hdev->adv_data_len = len;
1368
1369 cp.length = len;
1370
1371 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1372 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1373}
1374
1375int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1376{
1377 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1378 return 0;
1379
1380 if (ext_adv_capable(hdev))
1381 return hci_set_ext_adv_data_sync(hdev, instance);
1382
1383 return hci_set_adv_data_sync(hdev, instance);
1384}
1385
1386int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1387 __context_unsafe(/* conditional locking */)
1388{
1389 struct hci_cp_le_set_ext_adv_params cp;
1390 struct hci_rp_le_set_ext_adv_params rp;
1391 bool connectable, require_privacy;
1392 u32 flags;
1393 bdaddr_t random_addr;
1394 u8 own_addr_type;
1395 int err;
1396 struct adv_info *adv;
1397 bool secondary_adv;
1398
1399 /* Updating parameters of an active instance will return a
1400 * Command Disallowed error, so disable it before taking a snapshot.
1401 */
1402 if (instance > 0) {
1403 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1404 if (err)
1405 return err;
1406
1407 hci_dev_lock(hdev);
1408 adv = hci_find_adv_instance(hdev, instance);
1409 if (!adv) {
1410 hci_dev_unlock(hdev);
1411 return -EINVAL;
1412 }
1413 } else {
1414 err = hci_disable_ext_adv_legacy_instance_sync(hdev);
1415 if (err)
1416 return err;
1417
1418 adv = NULL;
1419 }
1420
1421 flags = hci_adv_instance_flags(hdev, instance);
1422
1423 /* If the "connectable" instance flag was not set, then choose between
1424 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1425 */
1426 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1427 mgmt_get_connectable(hdev);
1428
1429 if (!is_advertising_allowed(hdev, connectable)) {
1430 if (instance)
1431 hci_dev_unlock(hdev);
1432 return -EPERM;
1433 }
1434
1435 /* Set require_privacy to true only when non-connectable
1436 * advertising is used and it is not periodic.
1437 * In that case it is fine to use a non-resolvable private address.
1438 */
1439 require_privacy = !connectable && !(adv && adv->periodic);
1440
1441 err = hci_get_random_address(hdev, require_privacy,
1442 adv_use_rpa(hdev, flags), adv,
1443 &own_addr_type, &random_addr);
1444 if (err < 0) {
1445 if (instance)
1446 hci_dev_unlock(hdev);
1447 return err;
1448 }
1449
1450 memset(&cp, 0, sizeof(cp));
1451
1452 if (adv) {
1453 hci_cpu_to_le24(adv->min_interval, cp.min_interval);
1454 hci_cpu_to_le24(adv->max_interval, cp.max_interval);
1455 cp.tx_power = adv->tx_power;
1456 cp.sid = adv->sid;
1457 } else {
1458 hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
1459 hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
1460 cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
1461 cp.sid = 0x00;
1462 }
1463
1464 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
1465
1466 if (connectable) {
1467 if (secondary_adv)
1468 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
1469 else
1470 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
1471 } else if (hci_adv_instance_is_scannable(hdev, instance) ||
1472 (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
1473 if (secondary_adv)
1474 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
1475 else
1476 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
1477 } else {
1478 if (secondary_adv)
1479 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
1480 else
1481 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
1482 }
1483
1484 /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
1485 * contains the peer’s Identity Address and the Peer_Address_Type
1486 * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
1487 * These parameters are used to locate the corresponding local IRK in
1488 * the resolving list; this IRK is used to generate their own address
1489 * used in the advertisement.
1490 */
1491 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
1492 hci_copy_identity_address(hdev, &cp.peer_addr,
1493 &cp.peer_addr_type);
1494
1495 cp.own_addr_type = own_addr_type;
1496 cp.channel_map = hdev->le_adv_channel_map;
1497 cp.handle = adv ? adv->handle : instance;
1498
1499 if (instance)
1500 hci_dev_unlock(hdev);
1501
1502 if (flags & MGMT_ADV_FLAG_SEC_2M) {
1503 cp.primary_phy = HCI_ADV_PHY_1M;
1504 cp.secondary_phy = HCI_ADV_PHY_2M;
1505 } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
1506 cp.primary_phy = HCI_ADV_PHY_CODED;
1507 cp.secondary_phy = HCI_ADV_PHY_CODED;
1508 } else {
1509 /* In all other cases use 1M */
1510 cp.primary_phy = HCI_ADV_PHY_1M;
1511 cp.secondary_phy = HCI_ADV_PHY_1M;
1512 }
1513
1514 err = hci_set_ext_adv_params_sync(hdev, instance, &cp, &rp);
1515 if (err)
1516 return err;
1517
1518 /* Update adv data as tx power is known now */
1519 err = hci_set_ext_adv_data_sync(hdev, instance);
1520 if (err)
1521 return err;
1522
1523 if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
1524 own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
1525 bacmp(&random_addr, BDADDR_ANY)) {
1526 /* Check if random address need to be updated */
1527 if (instance) {
1528 hci_dev_lock(hdev);
1529 adv = hci_find_adv_instance(hdev, instance);
1530 if (!adv || !bacmp(&random_addr, &adv->random_addr)) {
1531 hci_dev_unlock(hdev);
1532 return 0;
1533 }
1534 hci_dev_unlock(hdev);
1535 } else {
1536 if (!bacmp(&random_addr, &hdev->random_addr))
1537 return 0;
1538 }
1539
1540 return hci_set_adv_set_random_addr_sync(hdev, instance,
1541 &random_addr);
1542 }
1543
1544 return 0;
1545}
1546
1547static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1548 __context_unsafe(/* conditional locking */)
1549{
1550 DEFINE_FLEX(struct hci_cp_le_set_ext_scan_rsp_data, pdu, data, length,
1551 HCI_MAX_EXT_AD_LENGTH);
1552 u8 len;
1553 struct adv_info *adv = NULL;
1554 int err;
1555
1556 if (instance) {
1557 hci_dev_lock(hdev);
1558
1559 adv = hci_find_adv_instance(hdev, instance);
1560 if (!adv || !adv->scan_rsp_changed) {
1561 hci_dev_unlock(hdev);
1562 return 0;
1563 }
1564 }
1565
1566 len = eir_create_scan_rsp(hdev, instance, pdu->data);
1567
1568 pdu->handle = adv ? adv->handle : instance;
1569 pdu->length = len;
1570 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1571 pdu->frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1572
1573 if (adv) {
1574 adv->scan_rsp_changed = false;
1575 hci_dev_unlock(hdev);
1576 }
1577
1578 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
1579 struct_size(pdu, data, len), pdu,
1580 HCI_CMD_TIMEOUT);
1581 if (err) {
1582 if (instance) {
1583 hci_dev_lock(hdev);
1584 adv = hci_find_adv_instance(hdev, instance);
1585 if (adv)
1586 adv->scan_rsp_changed = true;
1587 hci_dev_unlock(hdev);
1588 }
1589
1590 return err;
1591 }
1592
1593 if (!instance) {
1594 memcpy(hdev->scan_rsp_data, pdu->data, len);
1595 hdev->scan_rsp_data_len = len;
1596 }
1597
1598 return 0;
1599}
1600
1601static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1602 __context_unsafe(/* conditional locking */)
1603{
1604 struct hci_cp_le_set_scan_rsp_data cp;
1605 u8 len;
1606
1607 memset(&cp, 0, sizeof(cp));
1608
1609 if (instance)
1610 hci_dev_lock(hdev);
1611
1612 len = eir_create_scan_rsp(hdev, instance, cp.data);
1613
1614 if (instance)
1615 hci_dev_unlock(hdev);
1616
1617 if (hdev->scan_rsp_data_len == len &&
1618 !memcmp(cp.data, hdev->scan_rsp_data, len))
1619 return 0;
1620
1621 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
1622 hdev->scan_rsp_data_len = len;
1623
1624 cp.length = len;
1625
1626 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
1627 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1628}
1629
1630int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1631{
1632 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1633 return 0;
1634
1635 if (ext_adv_capable(hdev))
1636 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
1637
1638 return __hci_set_scan_rsp_data_sync(hdev, instance);
1639}
1640
1641int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
1642{
1643 struct hci_cp_le_set_ext_adv_enable *cp;
1644 struct hci_cp_ext_adv_set *set;
1645 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1646 struct adv_info *adv;
1647
1648 if (instance > 0) {
1649 adv = hci_find_adv_instance(hdev, instance);
1650 if (!adv)
1651 return -EINVAL;
1652 /* If already enabled there is nothing to do */
1653 if (adv->enabled)
1654 return 0;
1655 } else {
1656 adv = NULL;
1657 }
1658
1659 cp = (void *)data;
1660 set = (void *)cp->data;
1661
1662 memset(cp, 0, sizeof(*cp));
1663
1664 cp->enable = 0x01;
1665 cp->num_of_sets = 0x01;
1666
1667 memset(set, 0, sizeof(*set));
1668
1669 set->handle = adv ? adv->handle : instance;
1670
1671 /* Set duration per instance since controller is responsible for
1672 * scheduling it.
1673 */
1674 if (adv && adv->timeout) {
1675 u16 duration = adv->timeout * MSEC_PER_SEC;
1676
1677 /* Time = N * 10 ms */
1678 set->duration = cpu_to_le16(duration / 10);
1679 }
1680
1681 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1682 sizeof(*cp) +
1683 sizeof(*set) * cp->num_of_sets,
1684 data, HCI_CMD_TIMEOUT);
1685}
1686
1687int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
1688{
1689 int err;
1690
1691 err = hci_setup_ext_adv_instance_sync(hdev, instance);
1692 if (err)
1693 return err;
1694
1695 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
1696 if (err)
1697 return err;
1698
1699 return hci_enable_ext_advertising_sync(hdev, instance);
1700}
1701
1702int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1703{
1704 struct hci_cp_le_set_per_adv_enable cp;
1705 struct adv_info *adv = NULL;
1706
1707 /* If periodic advertising already disabled there is nothing to do. */
1708 adv = hci_find_adv_instance(hdev, instance);
1709 if (!adv || !adv->periodic_enabled)
1710 return 0;
1711
1712 memset(&cp, 0, sizeof(cp));
1713
1714 cp.enable = 0x00;
1715 cp.handle = instance;
1716
1717 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1718 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1719}
1720
1721static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance,
1722 u16 min_interval, u16 max_interval)
1723{
1724 struct hci_cp_le_set_per_adv_params cp;
1725
1726 memset(&cp, 0, sizeof(cp));
1727
1728 if (!min_interval)
1729 min_interval = DISCOV_LE_PER_ADV_INT_MIN;
1730
1731 if (!max_interval)
1732 max_interval = DISCOV_LE_PER_ADV_INT_MAX;
1733
1734 cp.handle = instance;
1735 cp.min_interval = cpu_to_le16(min_interval);
1736 cp.max_interval = cpu_to_le16(max_interval);
1737 cp.periodic_properties = 0x0000;
1738
1739 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS,
1740 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1741}
1742
1743static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance)
1744 __context_unsafe(/* conditional locking */)
1745{
1746 DEFINE_FLEX(struct hci_cp_le_set_per_adv_data, pdu, data, length,
1747 HCI_MAX_PER_AD_LENGTH);
1748 u8 len;
1749 struct adv_info *adv = NULL;
1750
1751 if (instance) {
1752 hci_dev_lock(hdev);
1753
1754 adv = hci_find_adv_instance(hdev, instance);
1755 if (!adv || !adv->periodic) {
1756 hci_dev_unlock(hdev);
1757 return 0;
1758 }
1759 }
1760
1761 len = eir_create_per_adv_data(hdev, instance, pdu->data);
1762
1763 pdu->length = len;
1764 pdu->handle = adv ? adv->handle : instance;
1765 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1766
1767 if (adv)
1768 hci_dev_unlock(hdev);
1769
1770 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA,
1771 struct_size(pdu, data, len), pdu,
1772 HCI_CMD_TIMEOUT);
1773}
1774
1775static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1776{
1777 struct hci_cp_le_set_per_adv_enable cp;
1778 struct adv_info *adv = NULL;
1779
1780 /* If periodic advertising already enabled there is nothing to do. */
1781 adv = hci_find_adv_instance(hdev, instance);
1782 if (adv && adv->periodic_enabled)
1783 return 0;
1784
1785 memset(&cp, 0, sizeof(cp));
1786
1787 cp.enable = 0x01;
1788 cp.handle = instance;
1789
1790 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1791 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1792}
1793
1794/* Checks if periodic advertising data contains a Basic Announcement and if it
1795 * does generates a Broadcast ID and add Broadcast Announcement.
1796 */
1797static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv)
1798{
1799 u8 bid[3];
1800 u8 ad[HCI_MAX_EXT_AD_LENGTH];
1801 u8 len;
1802
1803 /* Skip if NULL adv as instance 0x00 is used for general purpose
1804 * advertising so it cannot used for the likes of Broadcast Announcement
1805 * as it can be overwritten at any point.
1806 */
1807 if (!adv)
1808 return 0;
1809
1810 /* Check if PA data doesn't contains a Basic Audio Announcement then
1811 * there is nothing to do.
1812 */
1813 if (!eir_get_service_data(adv->per_adv_data, adv->per_adv_data_len,
1814 0x1851, NULL))
1815 return 0;
1816
1817 /* Check if advertising data already has a Broadcast Announcement since
1818 * the process may want to control the Broadcast ID directly and in that
1819 * case the kernel shall no interfere.
1820 */
1821 if (eir_get_service_data(adv->adv_data, adv->adv_data_len, 0x1852,
1822 NULL))
1823 return 0;
1824
1825 /* Generate Broadcast ID */
1826 get_random_bytes(bid, sizeof(bid));
1827 len = eir_append_service_data(ad, 0, 0x1852, bid, sizeof(bid));
1828 if (adv->adv_data_len > sizeof(ad) - len) {
1829 bt_dev_err(hdev, "No room for Broadcast Announcement");
1830 return -EINVAL;
1831 }
1832
1833 memcpy(ad + len, adv->adv_data, adv->adv_data_len);
1834 hci_set_adv_instance_data(hdev, adv->instance, len + adv->adv_data_len,
1835 ad, 0, NULL);
1836
1837 return hci_update_adv_data_sync(hdev, adv->instance);
1838}
1839
1840int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 sid,
1841 u8 data_len, u8 *data, u32 flags, u16 min_interval,
1842 u16 max_interval, u16 sync_interval)
1843{
1844 struct adv_info *adv = NULL;
1845 int err;
1846 bool added = false;
1847
1848 hci_disable_per_advertising_sync(hdev, instance);
1849
1850 if (instance) {
1851 adv = hci_find_adv_instance(hdev, instance);
1852 if (adv) {
1853 if (sid != HCI_SID_INVALID && adv->sid != sid) {
1854 /* If the SID don't match attempt to find by
1855 * SID.
1856 */
1857 adv = hci_find_adv_sid(hdev, sid);
1858 if (!adv) {
1859 bt_dev_err(hdev,
1860 "Unable to find adv_info");
1861 return -EINVAL;
1862 }
1863 }
1864
1865 /* Turn it into periodic advertising */
1866 adv->periodic = true;
1867 adv->per_adv_data_len = data_len;
1868 if (data)
1869 memcpy(adv->per_adv_data, data, data_len);
1870 adv->flags = flags;
1871 } else if (!adv) {
1872 /* Create an instance if that could not be found */
1873 adv = hci_add_per_instance(hdev, instance, sid, flags,
1874 data_len, data,
1875 sync_interval,
1876 sync_interval);
1877 if (IS_ERR(adv))
1878 return PTR_ERR(adv);
1879 adv->pending = false;
1880 added = true;
1881 }
1882 }
1883
1884 /* Start advertising */
1885 err = hci_start_ext_adv_sync(hdev, instance);
1886 if (err < 0)
1887 goto fail;
1888
1889 err = hci_adv_bcast_annoucement(hdev, adv);
1890 if (err < 0)
1891 goto fail;
1892
1893 err = hci_set_per_adv_params_sync(hdev, instance, min_interval,
1894 max_interval);
1895 if (err < 0)
1896 goto fail;
1897
1898 err = hci_set_per_adv_data_sync(hdev, instance);
1899 if (err < 0)
1900 goto fail;
1901
1902 err = hci_enable_per_advertising_sync(hdev, instance);
1903 if (err < 0)
1904 goto fail;
1905
1906 return 0;
1907
1908fail:
1909 if (added)
1910 hci_remove_adv_instance(hdev, instance);
1911
1912 return err;
1913}
1914
1915static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
1916{
1917 int err;
1918
1919 if (ext_adv_capable(hdev))
1920 return hci_start_ext_adv_sync(hdev, instance);
1921
1922 err = hci_update_adv_data_sync(hdev, instance);
1923 if (err)
1924 return err;
1925
1926 err = hci_update_scan_rsp_data_sync(hdev, instance);
1927 if (err)
1928 return err;
1929
1930 return hci_enable_advertising_sync(hdev);
1931}
1932
1933int hci_enable_advertising_sync(struct hci_dev *hdev)
1934{
1935 struct adv_info *adv_instance;
1936 struct hci_cp_le_set_adv_param cp;
1937 u8 own_addr_type, enable = 0x01;
1938 bool connectable;
1939 u16 adv_min_interval, adv_max_interval;
1940 u32 flags;
1941 u8 status;
1942
1943 if (ext_adv_capable(hdev))
1944 return hci_enable_ext_advertising_sync(hdev,
1945 hdev->cur_adv_instance);
1946
1947 flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
1948 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
1949
1950 /* If the "connectable" instance flag was not set, then choose between
1951 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1952 */
1953 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1954 mgmt_get_connectable(hdev);
1955
1956 if (!is_advertising_allowed(hdev, connectable))
1957 return -EINVAL;
1958
1959 status = hci_disable_advertising_sync(hdev);
1960 if (status)
1961 return status;
1962
1963 /* Clear the HCI_LE_ADV bit temporarily so that the
1964 * hci_update_random_address knows that it's safe to go ahead
1965 * and write a new random address. The flag will be set back on
1966 * as soon as the SET_ADV_ENABLE HCI command completes.
1967 */
1968 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1969
1970 /* Set require_privacy to true only when non-connectable
1971 * advertising is used. In that case it is fine to use a
1972 * non-resolvable private address.
1973 */
1974 status = hci_update_random_address_sync(hdev, !connectable,
1975 adv_use_rpa(hdev, flags),
1976 &own_addr_type);
1977 if (status)
1978 return status;
1979
1980 memset(&cp, 0, sizeof(cp));
1981
1982 if (adv_instance) {
1983 adv_min_interval = adv_instance->min_interval;
1984 adv_max_interval = adv_instance->max_interval;
1985 } else {
1986 adv_min_interval = hdev->le_adv_min_interval;
1987 adv_max_interval = hdev->le_adv_max_interval;
1988 }
1989
1990 if (connectable) {
1991 cp.type = LE_ADV_IND;
1992 } else {
1993 if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
1994 cp.type = LE_ADV_SCAN_IND;
1995 else
1996 cp.type = LE_ADV_NONCONN_IND;
1997
1998 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1999 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
2000 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
2001 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
2002 }
2003 }
2004
2005 cp.min_interval = cpu_to_le16(adv_min_interval);
2006 cp.max_interval = cpu_to_le16(adv_max_interval);
2007 cp.own_address_type = own_addr_type;
2008 cp.channel_map = hdev->le_adv_channel_map;
2009
2010 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
2011 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2012 if (status)
2013 return status;
2014
2015 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
2016 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
2017}
2018
2019static int enable_advertising_sync(struct hci_dev *hdev, void *data)
2020{
2021 return hci_enable_advertising_sync(hdev);
2022}
2023
2024int hci_enable_advertising(struct hci_dev *hdev)
2025{
2026 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
2027 list_empty(&hdev->adv_instances))
2028 return 0;
2029
2030 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
2031}
2032
2033int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
2034 struct sock *sk)
2035{
2036 int err;
2037
2038 if (!ext_adv_capable(hdev))
2039 return 0;
2040
2041 err = hci_disable_ext_adv_instance_sync(hdev, instance);
2042 if (err)
2043 return err;
2044
2045 /* If request specifies an instance that doesn't exist, fail */
2046 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
2047 return -EINVAL;
2048
2049 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
2050 sizeof(instance), &instance, 0,
2051 HCI_CMD_TIMEOUT, sk);
2052}
2053
2054int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason)
2055{
2056 struct hci_cp_le_term_big cp;
2057
2058 memset(&cp, 0, sizeof(cp));
2059 cp.handle = handle;
2060 cp.reason = reason;
2061
2062 return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG,
2063 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2064}
2065
2066int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
2067 bool force)
2068{
2069 struct adv_info *adv = NULL;
2070 u16 timeout;
2071
2072 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
2073 return -EPERM;
2074
2075 if (hdev->adv_instance_timeout)
2076 return -EBUSY;
2077
2078 adv = hci_find_adv_instance(hdev, instance);
2079 if (!adv)
2080 return -ENOENT;
2081
2082 /* A zero timeout means unlimited advertising. As long as there is
2083 * only one instance, duration should be ignored. We still set a timeout
2084 * in case further instances are being added later on.
2085 *
2086 * If the remaining lifetime of the instance is more than the duration
2087 * then the timeout corresponds to the duration, otherwise it will be
2088 * reduced to the remaining instance lifetime.
2089 */
2090 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
2091 timeout = adv->duration;
2092 else
2093 timeout = adv->remaining_time;
2094
2095 /* The remaining time is being reduced unless the instance is being
2096 * advertised without time limit.
2097 */
2098 if (adv->timeout)
2099 adv->remaining_time = adv->remaining_time - timeout;
2100
2101 /* Only use work for scheduling instances with legacy advertising */
2102 if (!ext_adv_capable(hdev)) {
2103 hdev->adv_instance_timeout = timeout;
2104 queue_delayed_work(hdev->req_workqueue,
2105 &hdev->adv_instance_expire,
2106 secs_to_jiffies(timeout));
2107 }
2108
2109 /* If we're just re-scheduling the same instance again then do not
2110 * execute any HCI commands. This happens when a single instance is
2111 * being advertised.
2112 */
2113 if (!force && hdev->cur_adv_instance == instance &&
2114 hci_dev_test_flag(hdev, HCI_LE_ADV))
2115 return 0;
2116
2117 hdev->cur_adv_instance = instance;
2118
2119 return hci_start_adv_sync(hdev, instance);
2120}
2121
2122static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
2123{
2124 int err;
2125
2126 if (!ext_adv_capable(hdev))
2127 return 0;
2128
2129 /* Disable instance 0x00 to disable all instances */
2130 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
2131 if (err)
2132 return err;
2133
2134 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
2135 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
2136}
2137
2138static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
2139{
2140 struct adv_info *adv, *n;
2141
2142 if (ext_adv_capable(hdev))
2143 /* Remove all existing sets */
2144 return hci_clear_adv_sets_sync(hdev, sk);
2145
2146 /* This is safe as long as there is no command send while the lock is
2147 * held.
2148 */
2149 hci_dev_lock(hdev);
2150
2151 /* Cleanup non-ext instances */
2152 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
2153 u8 instance = adv->instance;
2154 int err;
2155
2156 if (!(force || adv->timeout))
2157 continue;
2158
2159 err = hci_remove_adv_instance(hdev, instance);
2160 if (!err)
2161 mgmt_advertising_removed(sk, hdev, instance);
2162 }
2163
2164 hci_dev_unlock(hdev);
2165
2166 return 0;
2167}
2168
2169static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
2170 struct sock *sk)
2171{
2172 int err;
2173
2174 /* If we use extended advertising, instance has to be removed first. */
2175 if (ext_adv_capable(hdev))
2176 return hci_remove_ext_adv_instance_sync(hdev, instance, sk);
2177
2178 /* This is safe as long as there is no command send while the lock is
2179 * held.
2180 */
2181 hci_dev_lock(hdev);
2182
2183 err = hci_remove_adv_instance(hdev, instance);
2184 if (!err)
2185 mgmt_advertising_removed(sk, hdev, instance);
2186
2187 hci_dev_unlock(hdev);
2188
2189 return err;
2190}
2191
2192/* For a single instance:
2193 * - force == true: The instance will be removed even when its remaining
2194 * lifetime is not zero.
2195 * - force == false: the instance will be deactivated but kept stored unless
2196 * the remaining lifetime is zero.
2197 *
2198 * For instance == 0x00:
2199 * - force == true: All instances will be removed regardless of their timeout
2200 * setting.
2201 * - force == false: Only instances that have a timeout will be removed.
2202 */
2203int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
2204 u8 instance, bool force)
2205{
2206 struct adv_info *next = NULL;
2207 int err;
2208
2209 /* Cancel any timeout concerning the removed instance(s). */
2210 if (!instance || hdev->cur_adv_instance == instance)
2211 cancel_adv_timeout(hdev);
2212
2213 /* Get the next instance to advertise BEFORE we remove
2214 * the current one. This can be the same instance again
2215 * if there is only one instance.
2216 */
2217 if (hdev->cur_adv_instance == instance)
2218 next = hci_get_next_instance(hdev, instance);
2219
2220 if (!instance) {
2221 err = hci_clear_adv_sync(hdev, sk, force);
2222 if (err)
2223 return err;
2224 } else {
2225 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
2226
2227 if (force || (adv && adv->timeout && !adv->remaining_time)) {
2228 /* Don't advertise a removed instance. */
2229 if (next && next->instance == instance)
2230 next = NULL;
2231
2232 err = hci_remove_adv_sync(hdev, instance, sk);
2233 if (err)
2234 return err;
2235 }
2236 }
2237
2238 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
2239 return 0;
2240
2241 if (next && !ext_adv_capable(hdev))
2242 hci_schedule_adv_instance_sync(hdev, next->instance, false);
2243
2244 return 0;
2245}
2246
2247int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
2248{
2249 struct hci_cp_read_rssi cp;
2250
2251 cp.handle = handle;
2252 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
2253 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2254}
2255
2256int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
2257{
2258 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
2259 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
2260}
2261
2262int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
2263{
2264 struct hci_cp_read_tx_power cp;
2265
2266 cp.handle = handle;
2267 cp.type = type;
2268 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
2269 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2270}
2271
2272int hci_disable_advertising_sync(struct hci_dev *hdev)
2273{
2274 u8 enable = 0x00;
2275
2276 /* If controller is not advertising we are done. */
2277 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
2278 return 0;
2279
2280 if (ext_adv_capable(hdev))
2281 return hci_disable_ext_adv_instance_sync(hdev, 0x00);
2282
2283 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
2284 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
2285}
2286
2287static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
2288 u8 filter_dup)
2289{
2290 struct hci_cp_le_set_ext_scan_enable cp;
2291
2292 memset(&cp, 0, sizeof(cp));
2293 cp.enable = val;
2294
2295 if (hci_dev_test_flag(hdev, HCI_MESH))
2296 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2297 else
2298 cp.filter_dup = filter_dup;
2299
2300 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
2301 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2302}
2303
2304static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
2305 u8 filter_dup)
2306{
2307 struct hci_cp_le_set_scan_enable cp;
2308
2309 if (use_ext_scan(hdev))
2310 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
2311
2312 memset(&cp, 0, sizeof(cp));
2313 cp.enable = val;
2314
2315 if (val && hci_dev_test_flag(hdev, HCI_MESH))
2316 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2317 else
2318 cp.filter_dup = filter_dup;
2319
2320 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
2321 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2322}
2323
2324static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
2325{
2326 if (!ll_privacy_capable(hdev))
2327 return 0;
2328
2329 /* If controller is not/already resolving we are done. */
2330 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2331 return 0;
2332
2333 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
2334 sizeof(val), &val, HCI_CMD_TIMEOUT);
2335}
2336
2337static int hci_scan_disable_sync(struct hci_dev *hdev)
2338{
2339 int err;
2340
2341 /* If controller is not scanning we are done. */
2342 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
2343 return 0;
2344
2345 if (hdev->scanning_paused) {
2346 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2347 return 0;
2348 }
2349
2350 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
2351 if (err) {
2352 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
2353 return err;
2354 }
2355
2356 return err;
2357}
2358
2359static bool scan_use_rpa(struct hci_dev *hdev)
2360{
2361 return hci_dev_test_flag(hdev, HCI_PRIVACY);
2362}
2363
2364static void hci_start_interleave_scan(struct hci_dev *hdev)
2365{
2366 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
2367 queue_delayed_work(hdev->req_workqueue,
2368 &hdev->interleave_scan, 0);
2369}
2370
2371static void cancel_interleave_scan(struct hci_dev *hdev)
2372{
2373 bt_dev_dbg(hdev, "cancelling interleave scan");
2374
2375 cancel_delayed_work_sync(&hdev->interleave_scan);
2376
2377 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
2378}
2379
2380/* Return true if interleave_scan wasn't started until exiting this function,
2381 * otherwise, return false
2382 */
2383static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
2384{
2385 /* Do interleaved scan only if all of the following are true:
2386 * - There is at least one ADV monitor
2387 * - At least one pending LE connection or one device to be scanned for
2388 * - Monitor offloading is not supported
2389 * If so, we should alternate between allowlist scan and one without
2390 * any filters to save power.
2391 */
2392 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
2393 !(list_empty(&hdev->pend_le_conns) &&
2394 list_empty(&hdev->pend_le_reports)) &&
2395 hci_get_adv_monitor_offload_ext(hdev) ==
2396 HCI_ADV_MONITOR_EXT_NONE;
2397 bool is_interleaving = is_interleave_scanning(hdev);
2398
2399 if (use_interleaving && !is_interleaving) {
2400 hci_start_interleave_scan(hdev);
2401 bt_dev_dbg(hdev, "starting interleave scan");
2402 return true;
2403 }
2404
2405 if (!use_interleaving && is_interleaving)
2406 cancel_interleave_scan(hdev);
2407
2408 return false;
2409}
2410
2411/* Removes connection to resolve list if needed.*/
2412static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
2413 bdaddr_t *bdaddr, u8 bdaddr_type)
2414{
2415 struct hci_cp_le_del_from_resolv_list cp;
2416 struct bdaddr_list_with_irk *entry;
2417
2418 if (!ll_privacy_capable(hdev))
2419 return 0;
2420
2421 /* Check if the IRK has been programmed */
2422 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
2423 bdaddr_type);
2424 if (!entry)
2425 return 0;
2426
2427 cp.bdaddr_type = bdaddr_type;
2428 bacpy(&cp.bdaddr, bdaddr);
2429
2430 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
2431 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2432}
2433
2434static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
2435 bdaddr_t *bdaddr, u8 bdaddr_type)
2436{
2437 struct hci_cp_le_del_from_accept_list cp;
2438 int err;
2439
2440 /* Check if device is on accept list before removing it */
2441 if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
2442 return 0;
2443
2444 cp.bdaddr_type = bdaddr_type;
2445 bacpy(&cp.bdaddr, bdaddr);
2446
2447 /* Ignore errors when removing from resolving list as that is likely
2448 * that the device was never added.
2449 */
2450 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2451
2452 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
2453 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2454 if (err) {
2455 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
2456 return err;
2457 }
2458
2459 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
2460 cp.bdaddr_type);
2461
2462 return 0;
2463}
2464
2465struct conn_params {
2466 bdaddr_t addr;
2467 u8 addr_type;
2468 hci_conn_flags_t flags;
2469 u8 privacy_mode;
2470};
2471
2472/* Adds connection to resolve list if needed.
2473 * Setting params to NULL programs local hdev->irk
2474 */
2475static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
2476 struct conn_params *params)
2477{
2478 struct hci_cp_le_add_to_resolv_list cp;
2479 struct smp_irk *irk;
2480 struct bdaddr_list_with_irk *entry;
2481 struct hci_conn_params *p;
2482
2483 if (!ll_privacy_capable(hdev))
2484 return 0;
2485
2486 /* Attempt to program local identity address, type and irk if params is
2487 * NULL.
2488 */
2489 if (!params) {
2490 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
2491 return 0;
2492
2493 hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
2494 memcpy(cp.peer_irk, hdev->irk, 16);
2495 goto done;
2496 } else if (!(params->flags & HCI_CONN_FLAG_ADDRESS_RESOLUTION))
2497 return 0;
2498
2499 irk = hci_find_irk_by_addr(hdev, &params->addr, params->addr_type);
2500 if (!irk)
2501 return 0;
2502
2503 /* Check if the IK has _not_ been programmed yet. */
2504 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
2505 &params->addr,
2506 params->addr_type);
2507 if (entry)
2508 return 0;
2509
2510 cp.bdaddr_type = params->addr_type;
2511 bacpy(&cp.bdaddr, &params->addr);
2512 memcpy(cp.peer_irk, irk->val, 16);
2513
2514 /* Default privacy mode is always Network */
2515 params->privacy_mode = HCI_NETWORK_PRIVACY;
2516
2517 rcu_read_lock();
2518 p = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2519 &params->addr, params->addr_type);
2520 if (!p)
2521 p = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2522 &params->addr, params->addr_type);
2523 if (p)
2524 WRITE_ONCE(p->privacy_mode, HCI_NETWORK_PRIVACY);
2525 rcu_read_unlock();
2526
2527done:
2528 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
2529 memcpy(cp.local_irk, hdev->irk, 16);
2530 else
2531 memset(cp.local_irk, 0, 16);
2532
2533 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
2534 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2535}
2536
2537/* Set Device Privacy Mode. */
2538static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
2539 struct conn_params *params)
2540{
2541 struct hci_cp_le_set_privacy_mode cp;
2542 struct smp_irk *irk;
2543
2544 if (!ll_privacy_capable(hdev) ||
2545 !(params->flags & HCI_CONN_FLAG_ADDRESS_RESOLUTION))
2546 return 0;
2547
2548 /* If device privacy mode has already been set there is nothing to do */
2549 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
2550 return 0;
2551
2552 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
2553 * indicates that LL Privacy has been enabled and
2554 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
2555 */
2556 if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
2557 return 0;
2558
2559 irk = hci_find_irk_by_addr(hdev, &params->addr, params->addr_type);
2560 if (!irk)
2561 return 0;
2562
2563 memset(&cp, 0, sizeof(cp));
2564 cp.bdaddr_type = irk->addr_type;
2565 bacpy(&cp.bdaddr, &irk->bdaddr);
2566 cp.mode = HCI_DEVICE_PRIVACY;
2567
2568 /* Note: params->privacy_mode is not updated since it is a copy */
2569
2570 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
2571 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2572}
2573
2574/* Adds connection to allow list if needed, if the device uses RPA (has IRK)
2575 * this attempts to program the device in the resolving list as well and
2576 * properly set the privacy mode.
2577 */
2578static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
2579 struct conn_params *params,
2580 u8 *num_entries)
2581{
2582 struct hci_cp_le_add_to_accept_list cp;
2583 int err;
2584
2585 /* During suspend, only wakeable devices can be in acceptlist */
2586 if (hdev->suspended &&
2587 !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) {
2588 hci_le_del_accept_list_sync(hdev, &params->addr,
2589 params->addr_type);
2590 return 0;
2591 }
2592
2593 /* Select filter policy to accept all advertising */
2594 if (*num_entries >= hdev->le_accept_list_size)
2595 return -ENOSPC;
2596
2597 /* Attempt to program the device in the resolving list first to avoid
2598 * having to rollback in case it fails since the resolving list is
2599 * dynamic it can probably be smaller than the accept list.
2600 */
2601 err = hci_le_add_resolve_list_sync(hdev, params);
2602 if (err) {
2603 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
2604 return err;
2605 }
2606
2607 /* Set Privacy Mode */
2608 err = hci_le_set_privacy_mode_sync(hdev, params);
2609 if (err) {
2610 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
2611 return err;
2612 }
2613
2614 /* Check if already in accept list */
2615 if (hci_bdaddr_list_lookup(&hdev->le_accept_list, &params->addr,
2616 params->addr_type))
2617 return 0;
2618
2619 *num_entries += 1;
2620 cp.bdaddr_type = params->addr_type;
2621 bacpy(&cp.bdaddr, &params->addr);
2622
2623 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
2624 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2625 if (err) {
2626 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
2627 /* Rollback the device from the resolving list */
2628 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2629 return err;
2630 }
2631
2632 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
2633 cp.bdaddr_type);
2634
2635 return 0;
2636}
2637
2638/* This function disables/pause all advertising instances */
2639static int hci_pause_advertising_sync(struct hci_dev *hdev)
2640{
2641 int err;
2642 int old_state;
2643
2644 /* If controller is not advertising we are done. */
2645 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
2646 return 0;
2647
2648 /* If already been paused there is nothing to do. */
2649 if (hdev->advertising_paused)
2650 return 0;
2651
2652 bt_dev_dbg(hdev, "Pausing directed advertising");
2653
2654 /* Stop directed advertising */
2655 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
2656 if (old_state) {
2657 /* When discoverable timeout triggers, then just make sure
2658 * the limited discoverable flag is cleared. Even in the case
2659 * of a timeout triggered from general discoverable, it is
2660 * safe to unconditionally clear the flag.
2661 */
2662 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
2663 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
2664 hdev->discov_timeout = 0;
2665 }
2666
2667 bt_dev_dbg(hdev, "Pausing advertising instances");
2668
2669 /* Call to disable any advertisements active on the controller.
2670 * This will succeed even if no advertisements are configured.
2671 */
2672 err = hci_disable_advertising_sync(hdev);
2673 if (err)
2674 return err;
2675
2676 /* If we are using software rotation, pause the loop */
2677 if (!ext_adv_capable(hdev))
2678 cancel_adv_timeout(hdev);
2679
2680 hdev->advertising_paused = true;
2681 hdev->advertising_old_state = old_state;
2682
2683 return 0;
2684}
2685
2686/* This function enables all user advertising instances */
2687static int hci_resume_advertising_sync(struct hci_dev *hdev)
2688{
2689 struct adv_info *adv, *tmp;
2690 int err;
2691
2692 /* If advertising has not been paused there is nothing to do. */
2693 if (!hdev->advertising_paused)
2694 return 0;
2695
2696 /* Resume directed advertising */
2697 hdev->advertising_paused = false;
2698 if (hdev->advertising_old_state) {
2699 hci_dev_set_flag(hdev, HCI_ADVERTISING);
2700 hdev->advertising_old_state = 0;
2701 }
2702
2703 bt_dev_dbg(hdev, "Resuming advertising instances");
2704
2705 if (ext_adv_capable(hdev)) {
2706 /* Call for each tracked instance to be re-enabled */
2707 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
2708 err = hci_enable_ext_advertising_sync(hdev,
2709 adv->instance);
2710 if (!err)
2711 continue;
2712
2713 /* If the instance cannot be resumed remove it */
2714 hci_remove_ext_adv_instance_sync(hdev, adv->instance,
2715 NULL);
2716 }
2717
2718 /* If current advertising instance is set to instance 0x00
2719 * then we need to re-enable it.
2720 */
2721 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_ADV_0))
2722 err = hci_enable_ext_advertising_sync(hdev, 0x00);
2723 } else {
2724 /* Schedule for most recent instance to be restarted and begin
2725 * the software rotation loop
2726 */
2727 err = hci_schedule_adv_instance_sync(hdev,
2728 hdev->cur_adv_instance,
2729 true);
2730 }
2731
2732 hdev->advertising_paused = false;
2733
2734 return err;
2735}
2736
2737static int hci_pause_addr_resolution(struct hci_dev *hdev)
2738{
2739 int err;
2740
2741 if (!ll_privacy_capable(hdev))
2742 return 0;
2743
2744 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2745 return 0;
2746
2747 /* Cannot disable addr resolution if scanning is enabled or
2748 * when initiating an LE connection.
2749 */
2750 rcu_read_lock();
2751
2752 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2753 hci_lookup_le_connect(hdev)) {
2754 rcu_read_unlock();
2755 bt_dev_err(hdev, "Command not allowed when scan/LE connect");
2756 return -EPERM;
2757 }
2758
2759 rcu_read_unlock();
2760
2761 /* Cannot disable addr resolution if advertising is enabled. */
2762 err = hci_pause_advertising_sync(hdev);
2763 if (err) {
2764 bt_dev_err(hdev, "Pause advertising failed: %d", err);
2765 return err;
2766 }
2767
2768 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2769 if (err)
2770 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
2771 err);
2772
2773 /* Return if address resolution is disabled and RPA is not used. */
2774 if (!err && scan_use_rpa(hdev))
2775 return 0;
2776
2777 hci_resume_advertising_sync(hdev);
2778 return err;
2779}
2780
2781struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
2782 bool extended, struct sock *sk)
2783{
2784 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
2785 HCI_OP_READ_LOCAL_OOB_DATA;
2786
2787 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
2788}
2789
2790static struct conn_params *conn_params_copy(struct list_head *list, size_t *n)
2791{
2792 struct hci_conn_params *params;
2793 struct conn_params *p;
2794 size_t i;
2795
2796 rcu_read_lock();
2797
2798 i = 0;
2799 list_for_each_entry_rcu(params, list, action)
2800 ++i;
2801 *n = i;
2802
2803 rcu_read_unlock();
2804
2805 p = kvzalloc_objs(struct conn_params, *n);
2806 if (!p)
2807 return NULL;
2808
2809 rcu_read_lock();
2810
2811 i = 0;
2812 list_for_each_entry_rcu(params, list, action) {
2813 /* Racing adds are handled in next scan update */
2814 if (i >= *n)
2815 break;
2816
2817 /* No hdev->lock, but: addr, addr_type are immutable.
2818 * privacy_mode is only written by us or in
2819 * hci_cc_le_set_privacy_mode that we wait for.
2820 * We should be idempotent so MGMT updating flags
2821 * while we are processing is OK.
2822 */
2823 bacpy(&p[i].addr, &params->addr);
2824 p[i].addr_type = params->addr_type;
2825 p[i].flags = READ_ONCE(params->flags);
2826 p[i].privacy_mode = READ_ONCE(params->privacy_mode);
2827 ++i;
2828 }
2829
2830 rcu_read_unlock();
2831
2832 *n = i;
2833 return p;
2834}
2835
2836/* Clear LE Accept List */
2837static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
2838{
2839 if (!(hdev->commands[26] & 0x80))
2840 return 0;
2841
2842 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
2843 HCI_CMD_TIMEOUT);
2844}
2845
2846/* Device must not be scanning when updating the accept list.
2847 *
2848 * Update is done using the following sequence:
2849 *
2850 * ll_privacy_capable((Disable Advertising) -> Disable Resolving List) ->
2851 * Remove Devices From Accept List ->
2852 * (has IRK && ll_privacy_capable(Remove Devices From Resolving List))->
2853 * Add Devices to Accept List ->
2854 * (has IRK && ll_privacy_capable(Remove Devices From Resolving List)) ->
2855 * ll_privacy_capable(Enable Resolving List -> (Enable Advertising)) ->
2856 * Enable Scanning
2857 *
2858 * In case of failure advertising shall be restored to its original state and
2859 * return would disable accept list since either accept or resolving list could
2860 * not be programmed.
2861 *
2862 */
2863static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
2864{
2865 struct conn_params *params;
2866 struct bdaddr_list *b, *t;
2867 u8 num_entries = 0;
2868 bool pend_conn, pend_report;
2869 u8 filter_policy;
2870 size_t i, n;
2871 int err;
2872
2873 /* Pause advertising if resolving list can be used as controllers
2874 * cannot accept resolving list modifications while advertising.
2875 */
2876 if (ll_privacy_capable(hdev)) {
2877 err = hci_pause_advertising_sync(hdev);
2878 if (err) {
2879 bt_dev_err(hdev, "pause advertising failed: %d", err);
2880 return 0x00;
2881 }
2882 }
2883
2884 /* Disable address resolution while reprogramming accept list since
2885 * devices that do have an IRK will be programmed in the resolving list
2886 * when LL Privacy is enabled.
2887 */
2888 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2889 if (err) {
2890 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
2891 goto done;
2892 }
2893
2894 /* Force address filtering if PA Sync is in progress */
2895 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2896 struct hci_conn *conn;
2897
2898 rcu_read_lock();
2899
2900 conn = hci_conn_hash_lookup_create_pa_sync(hdev);
2901 if (conn) {
2902 struct conn_params pa;
2903
2904 memset(&pa, 0, sizeof(pa));
2905
2906 bacpy(&pa.addr, &conn->dst);
2907 pa.addr_type = conn->dst_type;
2908
2909 rcu_read_unlock();
2910
2911 /* Clear first since there could be addresses left
2912 * behind.
2913 */
2914 hci_le_clear_accept_list_sync(hdev);
2915
2916 num_entries = 1;
2917 err = hci_le_add_accept_list_sync(hdev, &pa,
2918 &num_entries);
2919 goto done;
2920 } else {
2921 rcu_read_unlock();
2922 }
2923 }
2924
2925 /* Go through the current accept list programmed into the
2926 * controller one by one and check if that address is connected or is
2927 * still in the list of pending connections or list of devices to
2928 * report. If not present in either list, then remove it from
2929 * the controller.
2930 */
2931 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
2932 rcu_read_lock();
2933
2934 if (hci_conn_hash_lookup_le(hdev, &b->bdaddr, b->bdaddr_type)) {
2935 rcu_read_unlock();
2936 continue;
2937 }
2938
2939 pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2940 &b->bdaddr,
2941 b->bdaddr_type);
2942 pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2943 &b->bdaddr,
2944 b->bdaddr_type);
2945
2946 rcu_read_unlock();
2947
2948 /* If the device is not likely to connect or report,
2949 * remove it from the acceptlist.
2950 */
2951 if (!pend_conn && !pend_report) {
2952 hci_le_del_accept_list_sync(hdev, &b->bdaddr,
2953 b->bdaddr_type);
2954 continue;
2955 }
2956
2957 num_entries++;
2958 }
2959
2960 /* Since all no longer valid accept list entries have been
2961 * removed, walk through the list of pending connections
2962 * and ensure that any new device gets programmed into
2963 * the controller.
2964 *
2965 * If the list of the devices is larger than the list of
2966 * available accept list entries in the controller, then
2967 * just abort and return filer policy value to not use the
2968 * accept list.
2969 *
2970 * The list and params may be mutated while we wait for events,
2971 * so make a copy and iterate it.
2972 */
2973
2974 params = conn_params_copy(&hdev->pend_le_conns, &n);
2975 if (!params) {
2976 err = -ENOMEM;
2977 goto done;
2978 }
2979
2980 for (i = 0; i < n; ++i) {
2981 err = hci_le_add_accept_list_sync(hdev, &params[i],
2982 &num_entries);
2983 if (err) {
2984 kvfree(params);
2985 goto done;
2986 }
2987 }
2988
2989 kvfree(params);
2990
2991 /* After adding all new pending connections, walk through
2992 * the list of pending reports and also add these to the
2993 * accept list if there is still space. Abort if space runs out.
2994 */
2995
2996 params = conn_params_copy(&hdev->pend_le_reports, &n);
2997 if (!params) {
2998 err = -ENOMEM;
2999 goto done;
3000 }
3001
3002 for (i = 0; i < n; ++i) {
3003 err = hci_le_add_accept_list_sync(hdev, &params[i],
3004 &num_entries);
3005 if (err) {
3006 kvfree(params);
3007 goto done;
3008 }
3009 }
3010
3011 kvfree(params);
3012
3013 /* Use the allowlist unless the following conditions are all true:
3014 * - We are not currently suspending
3015 * - There are 1 or more ADV monitors registered and it's not offloaded
3016 * - Interleaved scanning is not currently using the allowlist
3017 */
3018 if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
3019 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
3020 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
3021 err = -EINVAL;
3022
3023done:
3024 filter_policy = err ? 0x00 : 0x01;
3025
3026 /* Enable address resolution when LL Privacy is enabled. */
3027 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
3028 if (err)
3029 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
3030
3031 /* Resume advertising if it was paused */
3032 if (ll_privacy_capable(hdev))
3033 hci_resume_advertising_sync(hdev);
3034
3035 /* Select filter policy to use accept list */
3036 return filter_policy;
3037}
3038
3039static void hci_le_scan_phy_params(struct hci_cp_le_scan_phy_params *cp,
3040 u8 type, u16 interval, u16 window)
3041{
3042 cp->type = type;
3043 cp->interval = cpu_to_le16(interval);
3044 cp->window = cpu_to_le16(window);
3045}
3046
3047static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
3048 u16 interval, u16 window,
3049 u8 own_addr_type, u8 filter_policy)
3050{
3051 struct hci_cp_le_set_ext_scan_params *cp;
3052 struct hci_cp_le_scan_phy_params *phy;
3053 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
3054 u8 num_phy = 0x00;
3055
3056 cp = (void *)data;
3057 phy = (void *)cp->data;
3058
3059 memset(data, 0, sizeof(data));
3060
3061 cp->own_addr_type = own_addr_type;
3062 cp->filter_policy = filter_policy;
3063
3064 /* Check if PA Sync is in progress then select the PHY based on the
3065 * hci_conn.iso_qos.
3066 */
3067 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
3068 struct hci_cp_le_add_to_accept_list *sent;
3069 bdaddr_t bdaddr;
3070
3071 hci_dev_lock(hdev);
3072 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
3073 if (sent)
3074 bacpy(&bdaddr, &sent->bdaddr);
3075 hci_dev_unlock(hdev);
3076
3077 if (sent) {
3078 struct hci_conn *conn;
3079
3080 rcu_read_lock();
3081
3082 conn = hci_conn_hash_lookup_ba(hdev, PA_LINK,
3083 &bdaddr);
3084 if (conn) {
3085 struct bt_iso_qos *qos = &conn->iso_qos;
3086
3087 if (qos->bcast.in.phys & BT_ISO_PHY_1M ||
3088 qos->bcast.in.phys & BT_ISO_PHY_2M) {
3089 cp->scanning_phys |= LE_SCAN_PHY_1M;
3090 hci_le_scan_phy_params(phy, type,
3091 interval,
3092 window);
3093 num_phy++;
3094 phy++;
3095 }
3096
3097 if (qos->bcast.in.phys & BT_ISO_PHY_CODED) {
3098 cp->scanning_phys |= LE_SCAN_PHY_CODED;
3099 hci_le_scan_phy_params(phy, type,
3100 interval * 3,
3101 window * 3);
3102 num_phy++;
3103 phy++;
3104 }
3105
3106 rcu_read_unlock();
3107
3108 if (num_phy)
3109 goto done;
3110 } else {
3111 rcu_read_unlock();
3112 }
3113 }
3114 }
3115
3116 if (scan_1m(hdev) || scan_2m(hdev)) {
3117 cp->scanning_phys |= LE_SCAN_PHY_1M;
3118 hci_le_scan_phy_params(phy, type, interval, window);
3119 num_phy++;
3120 phy++;
3121 }
3122
3123 if (scan_coded(hdev)) {
3124 cp->scanning_phys |= LE_SCAN_PHY_CODED;
3125 hci_le_scan_phy_params(phy, type, interval * 3, window * 3);
3126 num_phy++;
3127 phy++;
3128 }
3129
3130done:
3131 if (!num_phy)
3132 return -EINVAL;
3133
3134 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
3135 sizeof(*cp) + sizeof(*phy) * num_phy,
3136 data, HCI_CMD_TIMEOUT);
3137}
3138
3139static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
3140 u16 interval, u16 window,
3141 u8 own_addr_type, u8 filter_policy)
3142{
3143 struct hci_cp_le_set_scan_param cp;
3144
3145 if (use_ext_scan(hdev))
3146 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
3147 window, own_addr_type,
3148 filter_policy);
3149
3150 memset(&cp, 0, sizeof(cp));
3151 cp.type = type;
3152 cp.interval = cpu_to_le16(interval);
3153 cp.window = cpu_to_le16(window);
3154 cp.own_address_type = own_addr_type;
3155 cp.filter_policy = filter_policy;
3156
3157 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
3158 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3159}
3160
3161static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
3162 u16 window, u8 own_addr_type, u8 filter_policy,
3163 u8 filter_dup)
3164{
3165 int err;
3166
3167 if (hdev->scanning_paused) {
3168 bt_dev_dbg(hdev, "Scanning is paused for suspend");
3169 return 0;
3170 }
3171
3172 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
3173 own_addr_type, filter_policy);
3174 if (err)
3175 return err;
3176
3177 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
3178}
3179
3180static int hci_passive_scan_sync(struct hci_dev *hdev)
3181{
3182 u8 own_addr_type;
3183 u8 filter_policy;
3184 u16 window, interval;
3185 u8 filter_dups = LE_SCAN_FILTER_DUP_ENABLE;
3186 int err;
3187
3188 if (hdev->scanning_paused) {
3189 bt_dev_dbg(hdev, "Scanning is paused for suspend");
3190 return 0;
3191 }
3192
3193 err = hci_scan_disable_sync(hdev);
3194 if (err) {
3195 bt_dev_err(hdev, "disable scanning failed: %d", err);
3196 return err;
3197 }
3198
3199 /* Set require_privacy to false since no SCAN_REQ are send
3200 * during passive scanning. Not using an non-resolvable address
3201 * here is important so that peer devices using direct
3202 * advertising with our address will be correctly reported
3203 * by the controller.
3204 */
3205 if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
3206 &own_addr_type))
3207 return 0;
3208
3209 if (hdev->enable_advmon_interleave_scan &&
3210 hci_update_interleaved_scan_sync(hdev))
3211 return 0;
3212
3213 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
3214
3215 /* Adding or removing entries from the accept list must
3216 * happen before enabling scanning. The controller does
3217 * not allow accept list modification while scanning.
3218 */
3219 filter_policy = hci_update_accept_list_sync(hdev);
3220
3221 /* If suspended and filter_policy set to 0x00 (no acceptlist) then
3222 * passive scanning cannot be started since that would require the host
3223 * to be woken up to process the reports.
3224 */
3225 if (hdev->suspended && !filter_policy) {
3226 /* Check if accept list is empty then there is no need to scan
3227 * while suspended.
3228 */
3229 if (list_empty(&hdev->le_accept_list))
3230 return 0;
3231
3232 /* If there are devices is the accept_list that means some
3233 * devices could not be programmed which in non-suspended case
3234 * means filter_policy needs to be set to 0x00 so the host needs
3235 * to filter, but since this is treating suspended case we
3236 * can ignore device needing host to filter to allow devices in
3237 * the acceptlist to be able to wakeup the system.
3238 */
3239 filter_policy = 0x01;
3240 }
3241
3242 /* When the controller is using random resolvable addresses and
3243 * with that having LE privacy enabled, then controllers with
3244 * Extended Scanner Filter Policies support can now enable support
3245 * for handling directed advertising.
3246 *
3247 * So instead of using filter polices 0x00 (no acceptlist)
3248 * and 0x01 (acceptlist enabled) use the new filter policies
3249 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
3250 */
3251 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
3252 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
3253 filter_policy |= 0x02;
3254
3255 if (hdev->suspended) {
3256 window = hdev->le_scan_window_suspend;
3257 interval = hdev->le_scan_int_suspend;
3258 } else if (hci_is_le_conn_scanning(hdev)) {
3259 window = hdev->le_scan_window_connect;
3260 interval = hdev->le_scan_int_connect;
3261 } else if (hci_is_adv_monitoring(hdev)) {
3262 window = hdev->le_scan_window_adv_monitor;
3263 interval = hdev->le_scan_int_adv_monitor;
3264
3265 /* Disable duplicates filter when scanning for advertisement
3266 * monitor for the following reasons.
3267 *
3268 * For HW pattern filtering (ex. MSFT), Realtek and Qualcomm
3269 * controllers ignore RSSI_Sampling_Period when the duplicates
3270 * filter is enabled.
3271 *
3272 * For SW pattern filtering, when we're not doing interleaved
3273 * scanning, it is necessary to disable duplicates filter,
3274 * otherwise hosts can only receive one advertisement and it's
3275 * impossible to know if a peer is still in range.
3276 */
3277 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
3278 } else {
3279 window = hdev->le_scan_window;
3280 interval = hdev->le_scan_interval;
3281 }
3282
3283 /* Disable all filtering for Mesh */
3284 if (hci_dev_test_flag(hdev, HCI_MESH)) {
3285 filter_policy = 0;
3286 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
3287 }
3288
3289 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
3290
3291 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
3292 own_addr_type, filter_policy, filter_dups);
3293}
3294
3295/* This function controls the passive scanning based on hdev->pend_le_conns
3296 * list. If there are pending LE connection we start the background scanning,
3297 * otherwise we stop it in the following sequence:
3298 *
3299 * If there are devices to scan:
3300 *
3301 * Disable Scanning -> Update Accept List ->
3302 * ll_privacy_capable((Disable Advertising) -> Disable Resolving List ->
3303 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
3304 * Enable Scanning
3305 *
3306 * Otherwise:
3307 *
3308 * Disable Scanning
3309 */
3310int hci_update_passive_scan_sync(struct hci_dev *hdev)
3311{
3312 int err;
3313
3314 if (!test_bit(HCI_UP, &hdev->flags) ||
3315 test_bit(HCI_INIT, &hdev->flags) ||
3316 hci_dev_test_flag(hdev, HCI_SETUP) ||
3317 hci_dev_test_flag(hdev, HCI_CONFIG) ||
3318 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
3319 hci_dev_test_flag(hdev, HCI_UNREGISTER))
3320 return 0;
3321
3322 /* No point in doing scanning if LE support hasn't been enabled */
3323 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
3324 return 0;
3325
3326 /* If discovery is active don't interfere with it */
3327 if (hdev->discovery.state != DISCOVERY_STOPPED)
3328 return 0;
3329
3330 /* Reset RSSI and UUID filters when starting background scanning
3331 * since these filters are meant for service discovery only.
3332 *
3333 * The Start Discovery and Start Service Discovery operations
3334 * ensure to set proper values for RSSI threshold and UUID
3335 * filter list. So it is safe to just reset them here.
3336 */
3337 hci_discovery_filter_clear(hdev);
3338
3339 bt_dev_dbg(hdev, "ADV monitoring is %s",
3340 hci_is_adv_monitoring(hdev) ? "on" : "off");
3341
3342 if (!hci_dev_test_flag(hdev, HCI_MESH) &&
3343 list_empty(&hdev->pend_le_conns) &&
3344 list_empty(&hdev->pend_le_reports) &&
3345 !hci_is_adv_monitoring(hdev) &&
3346 !hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
3347 /* If there is no pending LE connections or devices
3348 * to be scanned for or no ADV monitors, we should stop the
3349 * background scanning.
3350 */
3351
3352 bt_dev_dbg(hdev, "stopping background scanning");
3353
3354 err = hci_scan_disable_sync(hdev);
3355 if (err)
3356 bt_dev_err(hdev, "stop background scanning failed: %d",
3357 err);
3358 } else {
3359 /* If there is at least one pending LE connection, we should
3360 * keep the background scan running.
3361 */
3362 bool exists;
3363
3364 /* If controller is connecting, we should not start scanning
3365 * since some controllers are not able to scan and connect at
3366 * the same time.
3367 */
3368 rcu_read_lock();
3369 exists = hci_lookup_le_connect(hdev);
3370 rcu_read_unlock();
3371 if (exists)
3372 return 0;
3373
3374 bt_dev_dbg(hdev, "start background scanning");
3375
3376 err = hci_passive_scan_sync(hdev);
3377 if (err)
3378 bt_dev_err(hdev, "start background scanning failed: %d",
3379 err);
3380 }
3381
3382 return err;
3383}
3384
3385static int update_scan_sync(struct hci_dev *hdev, void *data)
3386{
3387 return hci_update_scan_sync(hdev);
3388}
3389
3390int hci_update_scan(struct hci_dev *hdev)
3391{
3392 return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL);
3393}
3394
3395static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
3396{
3397 return hci_update_passive_scan_sync(hdev);
3398}
3399
3400int hci_update_passive_scan(struct hci_dev *hdev)
3401{
3402 int err;
3403
3404 /* Only queue if it would have any effect */
3405 if (!test_bit(HCI_UP, &hdev->flags) ||
3406 test_bit(HCI_INIT, &hdev->flags) ||
3407 hci_dev_test_flag(hdev, HCI_SETUP) ||
3408 hci_dev_test_flag(hdev, HCI_CONFIG) ||
3409 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
3410 hci_dev_test_flag(hdev, HCI_UNREGISTER))
3411 return 0;
3412
3413 err = hci_cmd_sync_queue_once(hdev, update_passive_scan_sync, NULL,
3414 NULL);
3415 return (err == -EEXIST) ? 0 : err;
3416}
3417
3418int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
3419{
3420 int err;
3421
3422 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
3423 return 0;
3424
3425 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
3426 sizeof(val), &val, HCI_CMD_TIMEOUT);
3427
3428 if (!err) {
3429 if (val) {
3430 hdev->features[1][0] |= LMP_HOST_SC;
3431 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
3432 } else {
3433 hdev->features[1][0] &= ~LMP_HOST_SC;
3434 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
3435 }
3436 }
3437
3438 return err;
3439}
3440
3441int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
3442{
3443 int err;
3444
3445 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
3446 lmp_host_ssp_capable(hdev))
3447 return 0;
3448
3449 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
3450 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
3451 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3452 }
3453
3454 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3455 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3456 if (err)
3457 return err;
3458
3459 return hci_write_sc_support_sync(hdev, 0x01);
3460}
3461
3462int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
3463{
3464 struct hci_cp_write_le_host_supported cp;
3465
3466 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
3467 !lmp_bredr_capable(hdev))
3468 return 0;
3469
3470 /* Check first if we already have the right host state
3471 * (host features set)
3472 */
3473 if (le == lmp_host_le_capable(hdev) &&
3474 simul == lmp_host_le_br_capable(hdev))
3475 return 0;
3476
3477 memset(&cp, 0, sizeof(cp));
3478
3479 cp.le = le;
3480 cp.simul = simul;
3481
3482 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
3483 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3484}
3485
3486static int hci_powered_update_adv_sync(struct hci_dev *hdev)
3487{
3488 struct adv_info *adv, *tmp;
3489 int err;
3490
3491 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
3492 return 0;
3493
3494 /* If RPA Resolution has not been enable yet it means the
3495 * resolving list is empty and we should attempt to program the
3496 * local IRK in order to support using own_addr_type
3497 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
3498 */
3499 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
3500 hci_le_add_resolve_list_sync(hdev, NULL);
3501 hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
3502 }
3503
3504 /* Make sure the controller has a good default for
3505 * advertising data. This also applies to the case
3506 * where BR/EDR was toggled during the AUTO_OFF phase.
3507 */
3508 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
3509 list_empty(&hdev->adv_instances)) {
3510 if (ext_adv_capable(hdev)) {
3511 err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
3512 if (!err)
3513 hci_update_scan_rsp_data_sync(hdev, 0x00);
3514 } else {
3515 err = hci_update_adv_data_sync(hdev, 0x00);
3516 if (!err)
3517 hci_update_scan_rsp_data_sync(hdev, 0x00);
3518 }
3519
3520 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
3521 hci_enable_advertising_sync(hdev);
3522 }
3523
3524 /* Call for each tracked instance to be scheduled */
3525 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
3526 hci_schedule_adv_instance_sync(hdev, adv->instance, true);
3527
3528 return 0;
3529}
3530
3531static int hci_write_auth_enable_sync(struct hci_dev *hdev)
3532{
3533 u8 link_sec;
3534
3535 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
3536 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
3537 return 0;
3538
3539 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
3540 sizeof(link_sec), &link_sec,
3541 HCI_CMD_TIMEOUT);
3542}
3543
3544int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
3545{
3546 struct hci_cp_write_page_scan_activity cp;
3547 u8 type;
3548 int err = 0;
3549
3550 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3551 return 0;
3552
3553 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3554 return 0;
3555
3556 memset(&cp, 0, sizeof(cp));
3557
3558 if (enable) {
3559 type = PAGE_SCAN_TYPE_INTERLACED;
3560
3561 /* 160 msec page scan interval */
3562 cp.interval = cpu_to_le16(0x0100);
3563 } else {
3564 type = hdev->def_page_scan_type;
3565 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
3566 }
3567
3568 cp.window = cpu_to_le16(hdev->def_page_scan_window);
3569
3570 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
3571 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
3572 err = __hci_cmd_sync_status(hdev,
3573 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
3574 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3575 if (err)
3576 return err;
3577 }
3578
3579 if (hdev->page_scan_type != type)
3580 err = __hci_cmd_sync_status(hdev,
3581 HCI_OP_WRITE_PAGE_SCAN_TYPE,
3582 sizeof(type), &type,
3583 HCI_CMD_TIMEOUT);
3584
3585 return err;
3586}
3587
3588static bool disconnected_accept_list_entries(struct hci_dev *hdev)
3589 __must_hold(&hdev->lock)
3590{
3591 struct bdaddr_list *b;
3592
3593 list_for_each_entry(b, &hdev->accept_list, list) {
3594 struct hci_conn *conn;
3595
3596 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
3597 if (!conn)
3598 return true;
3599
3600 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3601 return true;
3602 }
3603
3604 return false;
3605}
3606
3607static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
3608{
3609 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
3610 sizeof(val), &val,
3611 HCI_CMD_TIMEOUT);
3612}
3613
3614int hci_update_scan_sync(struct hci_dev *hdev)
3615{
3616 u8 scan;
3617
3618 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3619 return 0;
3620
3621 if (!hdev_is_powered(hdev))
3622 return 0;
3623
3624 if (mgmt_powering_down(hdev))
3625 return 0;
3626
3627 if (hdev->scanning_paused)
3628 return 0;
3629
3630 hci_dev_lock(hdev);
3631
3632 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
3633 disconnected_accept_list_entries(hdev))
3634 scan = SCAN_PAGE;
3635 else
3636 scan = SCAN_DISABLED;
3637
3638 hci_dev_unlock(hdev);
3639
3640 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
3641 scan |= SCAN_INQUIRY;
3642
3643 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
3644 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
3645 return 0;
3646
3647 return hci_write_scan_enable_sync(hdev, scan);
3648}
3649
3650int hci_update_name_sync(struct hci_dev *hdev, const u8 *name)
3651{
3652 struct hci_cp_write_local_name cp;
3653
3654 memset(&cp, 0, sizeof(cp));
3655
3656 memcpy(cp.name, name, sizeof(cp.name));
3657
3658 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
3659 sizeof(cp), &cp,
3660 HCI_CMD_TIMEOUT);
3661}
3662
3663/* This function perform powered update HCI command sequence after the HCI init
3664 * sequence which end up resetting all states, the sequence is as follows:
3665 *
3666 * HCI_SSP_ENABLED(Enable SSP)
3667 * HCI_LE_ENABLED(Enable LE)
3668 * HCI_LE_ENABLED(ll_privacy_capable(Add local IRK to Resolving List) ->
3669 * Update adv data)
3670 * Enable Authentication
3671 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
3672 * Set Name -> Set EIR)
3673 * HCI_FORCE_STATIC_ADDR | BDADDR_ANY && !HCI_BREDR_ENABLED (Set Static Address)
3674 */
3675int hci_powered_update_sync(struct hci_dev *hdev)
3676{
3677 int err;
3678
3679 /* Register the available SMP channels (BR/EDR and LE) only when
3680 * successfully powering on the controller. This late
3681 * registration is required so that LE SMP can clearly decide if
3682 * the public address or static address is used.
3683 */
3684 smp_register(hdev);
3685
3686 err = hci_write_ssp_mode_sync(hdev, 0x01);
3687 if (err)
3688 return err;
3689
3690 err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
3691 if (err)
3692 return err;
3693
3694 err = hci_powered_update_adv_sync(hdev);
3695 if (err)
3696 return err;
3697
3698 err = hci_write_auth_enable_sync(hdev);
3699 if (err)
3700 return err;
3701
3702 if (lmp_bredr_capable(hdev)) {
3703 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
3704 hci_write_fast_connectable_sync(hdev, true);
3705 else
3706 hci_write_fast_connectable_sync(hdev, false);
3707 hci_update_scan_sync(hdev);
3708 hci_update_class_sync(hdev);
3709 hci_update_name_sync(hdev, hdev->dev_name);
3710 hci_update_eir_sync(hdev);
3711 }
3712
3713 /* If forcing static address is in use or there is no public
3714 * address use the static address as random address (but skip
3715 * the HCI command if the current random address is already the
3716 * static one.
3717 *
3718 * In case BR/EDR has been disabled on a dual-mode controller
3719 * and a static address has been configured, then use that
3720 * address instead of the public BR/EDR address.
3721 */
3722 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3723 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3724 !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))) {
3725 if (bacmp(&hdev->static_addr, BDADDR_ANY))
3726 return hci_set_random_addr_sync(hdev,
3727 &hdev->static_addr);
3728 }
3729
3730 return 0;
3731}
3732
3733/**
3734 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
3735 * (BD_ADDR) for a HCI device from
3736 * a firmware node property.
3737 * @hdev: The HCI device
3738 *
3739 * Search the firmware node for 'local-bd-address'.
3740 *
3741 * All-zero BD addresses are rejected, because those could be properties
3742 * that exist in the firmware tables, but were not updated by the firmware. For
3743 * example, the DTS could define 'local-bd-address', with zero BD addresses.
3744 */
3745static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
3746{
3747 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
3748 bdaddr_t ba;
3749 int ret;
3750
3751 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
3752 (u8 *)&ba, sizeof(ba));
3753 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
3754 return;
3755
3756 if (hci_test_quirk(hdev, HCI_QUIRK_BDADDR_PROPERTY_BROKEN))
3757 baswap(&hdev->public_addr, &ba);
3758 else
3759 bacpy(&hdev->public_addr, &ba);
3760}
3761
3762struct hci_init_stage {
3763 int (*func)(struct hci_dev *hdev);
3764};
3765
3766/* Run init stage NULL terminated function table */
3767static int hci_init_stage_sync(struct hci_dev *hdev,
3768 const struct hci_init_stage *stage)
3769{
3770 size_t i;
3771
3772 for (i = 0; stage[i].func; i++) {
3773 int err;
3774
3775 err = stage[i].func(hdev);
3776 if (err)
3777 return err;
3778 }
3779
3780 return 0;
3781}
3782
3783/* Read Local Version */
3784static int hci_read_local_version_sync(struct hci_dev *hdev)
3785{
3786 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
3787 0, NULL, HCI_CMD_TIMEOUT);
3788}
3789
3790/* Read BD Address */
3791static int hci_read_bd_addr_sync(struct hci_dev *hdev)
3792{
3793 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
3794 0, NULL, HCI_CMD_TIMEOUT);
3795}
3796
3797#define HCI_INIT(_func) \
3798{ \
3799 .func = _func, \
3800}
3801
3802static const struct hci_init_stage hci_init0[] = {
3803 /* HCI_OP_READ_LOCAL_VERSION */
3804 HCI_INIT(hci_read_local_version_sync),
3805 /* HCI_OP_READ_BD_ADDR */
3806 HCI_INIT(hci_read_bd_addr_sync),
3807 {}
3808};
3809
3810int hci_reset_sync(struct hci_dev *hdev)
3811{
3812 set_bit(HCI_RESET, &hdev->flags);
3813
3814 return __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
3815 HCI_CMD_TIMEOUT);
3816}
3817
3818/* Send a raw HCI reset for use by vendor drivers */
3819int __hci_reset_sync(struct hci_dev *hdev)
3820{
3821 return __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
3822 HCI_INIT_TIMEOUT);
3823}
3824EXPORT_SYMBOL(__hci_reset_sync);
3825
3826static int hci_init0_sync(struct hci_dev *hdev)
3827{
3828 int err;
3829
3830 bt_dev_dbg(hdev, "");
3831
3832 /* Reset */
3833 if (!hci_test_quirk(hdev, HCI_QUIRK_RESET_ON_CLOSE)) {
3834 err = hci_reset_sync(hdev);
3835 if (err)
3836 return err;
3837 }
3838
3839 return hci_init_stage_sync(hdev, hci_init0);
3840}
3841
3842static int hci_unconf_init_sync(struct hci_dev *hdev)
3843{
3844 int err;
3845
3846 if (hci_test_quirk(hdev, HCI_QUIRK_RAW_DEVICE))
3847 return 0;
3848
3849 err = hci_init0_sync(hdev);
3850 if (err < 0)
3851 return err;
3852
3853 if (hci_dev_test_flag(hdev, HCI_SETUP))
3854 hci_debugfs_create_basic(hdev);
3855
3856 return 0;
3857}
3858
3859/* Read Local Supported Features. */
3860static int hci_read_local_features_sync(struct hci_dev *hdev)
3861{
3862 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
3863 0, NULL, HCI_CMD_TIMEOUT);
3864}
3865
3866/* BR Controller init stage 1 command sequence */
3867static const struct hci_init_stage br_init1[] = {
3868 /* HCI_OP_READ_LOCAL_FEATURES */
3869 HCI_INIT(hci_read_local_features_sync),
3870 /* HCI_OP_READ_LOCAL_VERSION */
3871 HCI_INIT(hci_read_local_version_sync),
3872 /* HCI_OP_READ_BD_ADDR */
3873 HCI_INIT(hci_read_bd_addr_sync),
3874 {}
3875};
3876
3877/* Read Local Commands */
3878static int hci_read_local_cmds_sync(struct hci_dev *hdev)
3879{
3880 /* All Bluetooth 1.2 and later controllers should support the
3881 * HCI command for reading the local supported commands.
3882 *
3883 * Unfortunately some controllers indicate Bluetooth 1.2 support,
3884 * but do not have support for this command. If that is the case,
3885 * the driver can quirk the behavior and skip reading the local
3886 * supported commands.
3887 */
3888 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
3889 !hci_test_quirk(hdev, HCI_QUIRK_BROKEN_LOCAL_COMMANDS))
3890 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
3891 0, NULL, HCI_CMD_TIMEOUT);
3892
3893 return 0;
3894}
3895
3896static int hci_init1_sync(struct hci_dev *hdev)
3897{
3898 int err;
3899
3900 bt_dev_dbg(hdev, "");
3901
3902 /* Reset */
3903 if (!hci_test_quirk(hdev, HCI_QUIRK_RESET_ON_CLOSE)) {
3904 err = hci_reset_sync(hdev);
3905 if (err)
3906 return err;
3907 }
3908
3909 return hci_init_stage_sync(hdev, br_init1);
3910}
3911
3912/* Read Buffer Size (ACL mtu, max pkt, etc.) */
3913static int hci_read_buffer_size_sync(struct hci_dev *hdev)
3914{
3915 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
3916 0, NULL, HCI_CMD_TIMEOUT);
3917}
3918
3919/* Read Class of Device */
3920static int hci_read_dev_class_sync(struct hci_dev *hdev)
3921{
3922 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
3923 0, NULL, HCI_CMD_TIMEOUT);
3924}
3925
3926/* Read Local Name */
3927static int hci_read_local_name_sync(struct hci_dev *hdev)
3928{
3929 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
3930 0, NULL, HCI_CMD_TIMEOUT);
3931}
3932
3933/* Read Voice Setting */
3934static int hci_read_voice_setting_sync(struct hci_dev *hdev)
3935{
3936 if (!read_voice_setting_capable(hdev))
3937 return 0;
3938
3939 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
3940 0, NULL, HCI_CMD_TIMEOUT);
3941}
3942
3943/* Read Number of Supported IAC */
3944static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
3945{
3946 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
3947 0, NULL, HCI_CMD_TIMEOUT);
3948}
3949
3950/* Read Current IAC LAP */
3951static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
3952{
3953 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
3954 0, NULL, HCI_CMD_TIMEOUT);
3955}
3956
3957static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
3958 u8 cond_type, bdaddr_t *bdaddr,
3959 u8 auto_accept)
3960{
3961 struct hci_cp_set_event_filter cp;
3962
3963 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3964 return 0;
3965
3966 if (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL))
3967 return 0;
3968
3969 memset(&cp, 0, sizeof(cp));
3970 cp.flt_type = flt_type;
3971
3972 if (flt_type != HCI_FLT_CLEAR_ALL) {
3973 cp.cond_type = cond_type;
3974 bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
3975 cp.addr_conn_flt.auto_accept = auto_accept;
3976 }
3977
3978 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
3979 flt_type == HCI_FLT_CLEAR_ALL ?
3980 sizeof(cp.flt_type) : sizeof(cp), &cp,
3981 HCI_CMD_TIMEOUT);
3982}
3983
3984static int hci_clear_event_filter_sync(struct hci_dev *hdev)
3985{
3986 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
3987 return 0;
3988
3989 /* In theory the state machine should not reach here unless
3990 * a hci_set_event_filter_sync() call succeeds, but we do
3991 * the check both for parity and as a future reminder.
3992 */
3993 if (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL))
3994 return 0;
3995
3996 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
3997 BDADDR_ANY, 0x00);
3998}
3999
4000/* Connection accept timeout ~20 secs */
4001static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
4002{
4003 __le16 param = cpu_to_le16(0x7d00);
4004
4005 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
4006 sizeof(param), &param, HCI_CMD_TIMEOUT);
4007}
4008
4009/* Enable SCO flow control if supported */
4010static int hci_write_sync_flowctl_sync(struct hci_dev *hdev)
4011{
4012 struct hci_cp_write_sync_flowctl cp;
4013 int err;
4014
4015 /* Check if the controller supports SCO and HCI_OP_WRITE_SYNC_FLOWCTL */
4016 if (!lmp_sco_capable(hdev) || !(hdev->commands[10] & BIT(4)) ||
4017 !hci_test_quirk(hdev, HCI_QUIRK_SYNC_FLOWCTL_SUPPORTED))
4018 return 0;
4019
4020 memset(&cp, 0, sizeof(cp));
4021 cp.enable = 0x01;
4022
4023 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SYNC_FLOWCTL,
4024 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4025 if (!err)
4026 hci_dev_set_flag(hdev, HCI_SCO_FLOWCTL);
4027
4028 return err;
4029}
4030
4031/* BR Controller init stage 2 command sequence */
4032static const struct hci_init_stage br_init2[] = {
4033 /* HCI_OP_READ_BUFFER_SIZE */
4034 HCI_INIT(hci_read_buffer_size_sync),
4035 /* HCI_OP_READ_CLASS_OF_DEV */
4036 HCI_INIT(hci_read_dev_class_sync),
4037 /* HCI_OP_READ_LOCAL_NAME */
4038 HCI_INIT(hci_read_local_name_sync),
4039 /* HCI_OP_READ_VOICE_SETTING */
4040 HCI_INIT(hci_read_voice_setting_sync),
4041 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
4042 HCI_INIT(hci_read_num_supported_iac_sync),
4043 /* HCI_OP_READ_CURRENT_IAC_LAP */
4044 HCI_INIT(hci_read_current_iac_lap_sync),
4045 /* HCI_OP_SET_EVENT_FLT */
4046 HCI_INIT(hci_clear_event_filter_sync),
4047 /* HCI_OP_WRITE_CA_TIMEOUT */
4048 HCI_INIT(hci_write_ca_timeout_sync),
4049 /* HCI_OP_WRITE_SYNC_FLOWCTL */
4050 HCI_INIT(hci_write_sync_flowctl_sync),
4051 {}
4052};
4053
4054static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
4055{
4056 u8 mode = 0x01;
4057
4058 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
4059 return 0;
4060
4061 /* When SSP is available, then the host features page
4062 * should also be available as well. However some
4063 * controllers list the max_page as 0 as long as SSP
4064 * has not been enabled. To achieve proper debugging
4065 * output, force the minimum max_page to 1 at least.
4066 */
4067 hdev->max_page = 0x01;
4068
4069 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
4070 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
4071}
4072
4073static int hci_write_eir_sync(struct hci_dev *hdev)
4074{
4075 struct hci_cp_write_eir cp;
4076
4077 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
4078 return 0;
4079
4080 memset(hdev->eir, 0, sizeof(hdev->eir));
4081 memset(&cp, 0, sizeof(cp));
4082
4083 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
4084 HCI_CMD_TIMEOUT);
4085}
4086
4087static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
4088{
4089 u8 mode;
4090
4091 if (!lmp_inq_rssi_capable(hdev) &&
4092 !hci_test_quirk(hdev, HCI_QUIRK_FIXUP_INQUIRY_MODE))
4093 return 0;
4094
4095 /* If Extended Inquiry Result events are supported, then
4096 * they are clearly preferred over Inquiry Result with RSSI
4097 * events.
4098 */
4099 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
4100
4101 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
4102 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
4103}
4104
4105static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
4106{
4107 if (!lmp_inq_tx_pwr_capable(hdev))
4108 return 0;
4109
4110 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
4111 0, NULL, HCI_CMD_TIMEOUT);
4112}
4113
4114static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
4115{
4116 struct hci_cp_read_local_ext_features cp;
4117
4118 if (!lmp_ext_feat_capable(hdev))
4119 return 0;
4120
4121 memset(&cp, 0, sizeof(cp));
4122 cp.page = page;
4123
4124 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
4125 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4126}
4127
4128static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
4129{
4130 return hci_read_local_ext_features_sync(hdev, 0x01);
4131}
4132
4133/* HCI Controller init stage 2 command sequence */
4134static const struct hci_init_stage hci_init2[] = {
4135 /* HCI_OP_READ_LOCAL_COMMANDS */
4136 HCI_INIT(hci_read_local_cmds_sync),
4137 /* HCI_OP_WRITE_SSP_MODE */
4138 HCI_INIT(hci_write_ssp_mode_1_sync),
4139 /* HCI_OP_WRITE_EIR */
4140 HCI_INIT(hci_write_eir_sync),
4141 /* HCI_OP_WRITE_INQUIRY_MODE */
4142 HCI_INIT(hci_write_inquiry_mode_sync),
4143 /* HCI_OP_READ_INQ_RSP_TX_POWER */
4144 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
4145 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
4146 HCI_INIT(hci_read_local_ext_features_1_sync),
4147 /* HCI_OP_WRITE_AUTH_ENABLE */
4148 HCI_INIT(hci_write_auth_enable_sync),
4149 {}
4150};
4151
4152/* Read LE Buffer Size */
4153static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
4154{
4155 /* Use Read LE Buffer Size V2 if supported */
4156 if (iso_capable(hdev) && hdev->commands[41] & 0x20)
4157 return __hci_cmd_sync_status(hdev,
4158 HCI_OP_LE_READ_BUFFER_SIZE_V2,
4159 0, NULL, HCI_CMD_TIMEOUT);
4160
4161 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
4162 0, NULL, HCI_CMD_TIMEOUT);
4163}
4164
4165/* Read LE Local Supported Features */
4166static int hci_le_read_local_features_sync(struct hci_dev *hdev)
4167{
4168 int err;
4169
4170 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
4171 0, NULL, HCI_CMD_TIMEOUT);
4172 if (err)
4173 return err;
4174
4175 if (ll_ext_feature_capable(hdev) && hdev->commands[47] & BIT(2))
4176 return __hci_cmd_sync_status(hdev,
4177 HCI_OP_LE_READ_ALL_LOCAL_FEATURES,
4178 0, NULL, HCI_CMD_TIMEOUT);
4179
4180 return err;
4181}
4182
4183/* Read LE Supported States */
4184static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
4185{
4186 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
4187 0, NULL, HCI_CMD_TIMEOUT);
4188}
4189
4190/* LE Controller init stage 2 command sequence */
4191static const struct hci_init_stage le_init2[] = {
4192 /* HCI_OP_LE_READ_LOCAL_FEATURES */
4193 HCI_INIT(hci_le_read_local_features_sync),
4194 /* HCI_OP_LE_READ_BUFFER_SIZE */
4195 HCI_INIT(hci_le_read_buffer_size_sync),
4196 /* HCI_OP_LE_READ_SUPPORTED_STATES */
4197 HCI_INIT(hci_le_read_supported_states_sync),
4198 {}
4199};
4200
4201static int hci_init2_sync(struct hci_dev *hdev)
4202{
4203 int err;
4204
4205 bt_dev_dbg(hdev, "");
4206
4207 err = hci_init_stage_sync(hdev, hci_init2);
4208 if (err)
4209 return err;
4210
4211 if (lmp_bredr_capable(hdev)) {
4212 err = hci_init_stage_sync(hdev, br_init2);
4213 if (err)
4214 return err;
4215 } else {
4216 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
4217 }
4218
4219 if (lmp_le_capable(hdev)) {
4220 err = hci_init_stage_sync(hdev, le_init2);
4221 if (err)
4222 return err;
4223 /* LE-only controllers have LE implicitly enabled */
4224 if (!lmp_bredr_capable(hdev))
4225 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
4226 }
4227
4228 return 0;
4229}
4230
4231static int hci_set_event_mask_sync(struct hci_dev *hdev)
4232{
4233 /* The second byte is 0xff instead of 0x9f (two reserved bits
4234 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
4235 * command otherwise.
4236 */
4237 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
4238
4239 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
4240 * any event mask for pre 1.2 devices.
4241 */
4242 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
4243 return 0;
4244
4245 if (lmp_bredr_capable(hdev)) {
4246 events[4] |= 0x01; /* Flow Specification Complete */
4247
4248 /* Don't set Disconnect Complete and mode change when
4249 * suspended as that would wakeup the host when disconnecting
4250 * due to suspend.
4251 */
4252 if (hdev->suspended) {
4253 events[0] &= 0xef;
4254 events[2] &= 0xf7;
4255 }
4256 } else {
4257 /* Use a different default for LE-only devices */
4258 memset(events, 0, sizeof(events));
4259 events[1] |= 0x20; /* Command Complete */
4260 events[1] |= 0x40; /* Command Status */
4261 events[1] |= 0x80; /* Hardware Error */
4262
4263 /* If the controller supports the Disconnect command, enable
4264 * the corresponding event. In addition enable packet flow
4265 * control related events.
4266 */
4267 if (hdev->commands[0] & 0x20) {
4268 /* Don't set Disconnect Complete when suspended as that
4269 * would wakeup the host when disconnecting due to
4270 * suspend.
4271 */
4272 if (!hdev->suspended)
4273 events[0] |= 0x10; /* Disconnection Complete */
4274 events[2] |= 0x04; /* Number of Completed Packets */
4275 events[3] |= 0x02; /* Data Buffer Overflow */
4276 }
4277
4278 /* If the controller supports the Read Remote Version
4279 * Information command, enable the corresponding event.
4280 */
4281 if (hdev->commands[2] & 0x80)
4282 events[1] |= 0x08; /* Read Remote Version Information
4283 * Complete
4284 */
4285
4286 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
4287 events[0] |= 0x80; /* Encryption Change */
4288 events[5] |= 0x80; /* Encryption Key Refresh Complete */
4289 }
4290 }
4291
4292 if (lmp_inq_rssi_capable(hdev) ||
4293 hci_test_quirk(hdev, HCI_QUIRK_FIXUP_INQUIRY_MODE))
4294 events[4] |= 0x02; /* Inquiry Result with RSSI */
4295
4296 if (lmp_ext_feat_capable(hdev))
4297 events[4] |= 0x04; /* Read Remote Extended Features Complete */
4298
4299 if (lmp_esco_capable(hdev)) {
4300 events[5] |= 0x08; /* Synchronous Connection Complete */
4301 events[5] |= 0x10; /* Synchronous Connection Changed */
4302 }
4303
4304 if (lmp_sniffsubr_capable(hdev))
4305 events[5] |= 0x20; /* Sniff Subrating */
4306
4307 if (lmp_pause_enc_capable(hdev))
4308 events[5] |= 0x80; /* Encryption Key Refresh Complete */
4309
4310 if (lmp_ext_inq_capable(hdev))
4311 events[5] |= 0x40; /* Extended Inquiry Result */
4312
4313 if (lmp_no_flush_capable(hdev))
4314 events[7] |= 0x01; /* Enhanced Flush Complete */
4315
4316 if (lmp_lsto_capable(hdev))
4317 events[6] |= 0x80; /* Link Supervision Timeout Changed */
4318
4319 if (lmp_ssp_capable(hdev)) {
4320 events[6] |= 0x01; /* IO Capability Request */
4321 events[6] |= 0x02; /* IO Capability Response */
4322 events[6] |= 0x04; /* User Confirmation Request */
4323 events[6] |= 0x08; /* User Passkey Request */
4324 events[6] |= 0x10; /* Remote OOB Data Request */
4325 events[6] |= 0x20; /* Simple Pairing Complete */
4326 events[7] |= 0x04; /* User Passkey Notification */
4327 events[7] |= 0x08; /* Keypress Notification */
4328 events[7] |= 0x10; /* Remote Host Supported
4329 * Features Notification
4330 */
4331 }
4332
4333 if (lmp_le_capable(hdev))
4334 events[7] |= 0x20; /* LE Meta-Event */
4335
4336 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
4337 sizeof(events), events, HCI_CMD_TIMEOUT);
4338}
4339
4340static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
4341{
4342 struct hci_cp_read_stored_link_key cp;
4343
4344 if (!(hdev->commands[6] & 0x20) ||
4345 hci_test_quirk(hdev, HCI_QUIRK_BROKEN_STORED_LINK_KEY))
4346 return 0;
4347
4348 memset(&cp, 0, sizeof(cp));
4349 bacpy(&cp.bdaddr, BDADDR_ANY);
4350 cp.read_all = 0x01;
4351
4352 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
4353 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4354}
4355
4356static int hci_setup_link_policy_sync(struct hci_dev *hdev)
4357{
4358 struct hci_cp_write_def_link_policy cp;
4359 u16 link_policy = 0;
4360
4361 if (!(hdev->commands[5] & 0x10))
4362 return 0;
4363
4364 memset(&cp, 0, sizeof(cp));
4365
4366 if (lmp_rswitch_capable(hdev))
4367 link_policy |= HCI_LP_RSWITCH;
4368 if (lmp_hold_capable(hdev))
4369 link_policy |= HCI_LP_HOLD;
4370 if (lmp_sniff_capable(hdev))
4371 link_policy |= HCI_LP_SNIFF;
4372 if (lmp_park_capable(hdev))
4373 link_policy |= HCI_LP_PARK;
4374
4375 cp.policy = cpu_to_le16(link_policy);
4376
4377 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
4378 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4379}
4380
4381static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
4382{
4383 if (!(hdev->commands[8] & 0x01))
4384 return 0;
4385
4386 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
4387 0, NULL, HCI_CMD_TIMEOUT);
4388}
4389
4390static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
4391{
4392 if (!(hdev->commands[18] & 0x04) ||
4393 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4394 hci_test_quirk(hdev, HCI_QUIRK_BROKEN_ERR_DATA_REPORTING))
4395 return 0;
4396
4397 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4398 0, NULL, HCI_CMD_TIMEOUT);
4399}
4400
4401static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
4402{
4403 /* Some older Broadcom based Bluetooth 1.2 controllers do not
4404 * support the Read Page Scan Type command. Check support for
4405 * this command in the bit mask of supported commands.
4406 */
4407 if (!(hdev->commands[13] & 0x01) ||
4408 hci_test_quirk(hdev, HCI_QUIRK_BROKEN_READ_PAGE_SCAN_TYPE))
4409 return 0;
4410
4411 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
4412 0, NULL, HCI_CMD_TIMEOUT);
4413}
4414
4415/* Read features beyond page 1 if available */
4416static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
4417{
4418 u8 page;
4419 int err;
4420
4421 if (!lmp_ext_feat_capable(hdev))
4422 return 0;
4423
4424 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
4425 page++) {
4426 err = hci_read_local_ext_features_sync(hdev, page);
4427 if (err)
4428 return err;
4429 }
4430
4431 return 0;
4432}
4433
4434/* HCI Controller init stage 3 command sequence */
4435static const struct hci_init_stage hci_init3[] = {
4436 /* HCI_OP_SET_EVENT_MASK */
4437 HCI_INIT(hci_set_event_mask_sync),
4438 /* HCI_OP_READ_STORED_LINK_KEY */
4439 HCI_INIT(hci_read_stored_link_key_sync),
4440 /* HCI_OP_WRITE_DEF_LINK_POLICY */
4441 HCI_INIT(hci_setup_link_policy_sync),
4442 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
4443 HCI_INIT(hci_read_page_scan_activity_sync),
4444 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
4445 HCI_INIT(hci_read_def_err_data_reporting_sync),
4446 /* HCI_OP_READ_PAGE_SCAN_TYPE */
4447 HCI_INIT(hci_read_page_scan_type_sync),
4448 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
4449 HCI_INIT(hci_read_local_ext_features_all_sync),
4450 {}
4451};
4452
4453static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
4454{
4455 u8 events[8];
4456
4457 if (!lmp_le_capable(hdev))
4458 return 0;
4459
4460 memset(events, 0, sizeof(events));
4461
4462 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
4463 events[0] |= 0x10; /* LE Long Term Key Request */
4464
4465 /* If controller supports the Connection Parameters Request
4466 * Link Layer Procedure, enable the corresponding event.
4467 */
4468 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
4469 /* LE Remote Connection Parameter Request */
4470 events[0] |= 0x20;
4471
4472 /* If the controller supports the Data Length Extension
4473 * feature, enable the corresponding event.
4474 */
4475 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
4476 events[0] |= 0x40; /* LE Data Length Change */
4477
4478 /* If the controller supports LL Privacy feature or LE Extended Adv,
4479 * enable the corresponding event.
4480 */
4481 if (use_enhanced_conn_complete(hdev))
4482 events[1] |= 0x02; /* LE Enhanced Connection Complete */
4483
4484 /* Mark Device Privacy if Privacy Mode is supported */
4485 if (privacy_mode_capable(hdev))
4486 hdev->conn_flags |= HCI_CONN_FLAG_DEVICE_PRIVACY;
4487
4488 /* Mark Address Resolution if LL Privacy is supported */
4489 if (ll_privacy_capable(hdev))
4490 hdev->conn_flags |= HCI_CONN_FLAG_ADDRESS_RESOLUTION;
4491
4492 /* Mark PAST if supported */
4493 if (past_capable(hdev))
4494 hdev->conn_flags |= HCI_CONN_FLAG_PAST;
4495
4496 /* If the controller supports Extended Scanner Filter
4497 * Policies, enable the corresponding event.
4498 */
4499 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
4500 events[1] |= 0x04; /* LE Direct Advertising Report */
4501
4502 /* If the controller supports Channel Selection Algorithm #2
4503 * feature, enable the corresponding event.
4504 */
4505 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
4506 events[2] |= 0x08; /* LE Channel Selection Algorithm */
4507
4508 /* If the controller supports the LE Set Scan Enable command,
4509 * enable the corresponding advertising report event.
4510 */
4511 if (hdev->commands[26] & 0x08)
4512 events[0] |= 0x02; /* LE Advertising Report */
4513
4514 /* If the controller supports the LE Create Connection
4515 * command, enable the corresponding event.
4516 */
4517 if (hdev->commands[26] & 0x10)
4518 events[0] |= 0x01; /* LE Connection Complete */
4519
4520 /* If the controller supports the LE Connection Update
4521 * command, enable the corresponding event.
4522 */
4523 if (hdev->commands[27] & 0x04)
4524 events[0] |= 0x04; /* LE Connection Update Complete */
4525
4526 /* If the controller supports the LE Read Remote Used Features
4527 * command, enable the corresponding event.
4528 */
4529 if (hdev->commands[27] & 0x20)
4530 /* LE Read Remote Used Features Complete */
4531 events[0] |= 0x08;
4532
4533 /* If the controller supports the LE Read Local P-256
4534 * Public Key command, enable the corresponding event.
4535 */
4536 if (hdev->commands[34] & 0x02)
4537 /* LE Read Local P-256 Public Key Complete */
4538 events[0] |= 0x80;
4539
4540 /* If the controller supports the LE Generate DHKey
4541 * command, enable the corresponding event.
4542 */
4543 if (hdev->commands[34] & 0x04)
4544 events[1] |= 0x01; /* LE Generate DHKey Complete */
4545
4546 /* If the controller supports the LE Set Default PHY or
4547 * LE Set PHY commands, enable the corresponding event.
4548 */
4549 if (hdev->commands[35] & (0x20 | 0x40))
4550 events[1] |= 0x08; /* LE PHY Update Complete */
4551
4552 /* If the controller supports LE Set Extended Scan Parameters
4553 * and LE Set Extended Scan Enable commands, enable the
4554 * corresponding event.
4555 */
4556 if (use_ext_scan(hdev))
4557 events[1] |= 0x10; /* LE Extended Advertising Report */
4558
4559 /* If the controller supports the LE Extended Advertising
4560 * command, enable the corresponding event.
4561 */
4562 if (ext_adv_capable(hdev))
4563 events[2] |= 0x02; /* LE Advertising Set Terminated */
4564
4565 if (past_receiver_capable(hdev))
4566 events[2] |= 0x80; /* LE PAST Received */
4567
4568 if (cis_capable(hdev)) {
4569 events[3] |= 0x01; /* LE CIS Established */
4570 if (cis_peripheral_capable(hdev))
4571 events[3] |= 0x02; /* LE CIS Request */
4572 }
4573
4574 if (bis_capable(hdev)) {
4575 events[1] |= 0x20; /* LE PA Report */
4576 events[1] |= 0x40; /* LE PA Sync Established */
4577 events[1] |= 0x80; /* LE PA Sync Lost */
4578 events[3] |= 0x04; /* LE Create BIG Complete */
4579 events[3] |= 0x08; /* LE Terminate BIG Complete */
4580 events[3] |= 0x10; /* LE BIG Sync Established */
4581 events[3] |= 0x20; /* LE BIG Sync Loss */
4582 events[4] |= 0x02; /* LE BIG Info Advertising Report */
4583 }
4584
4585 if (ll_ext_feature_capable(hdev))
4586 events[5] |= BIT(2);
4587
4588 if (le_cs_capable(hdev)) {
4589 /* Channel Sounding events */
4590 events[5] |= 0x08; /* LE CS Read Remote Supported Cap Complete event */
4591 events[5] |= 0x10; /* LE CS Read Remote FAE Table Complete event */
4592 events[5] |= 0x20; /* LE CS Security Enable Complete event */
4593 events[5] |= 0x40; /* LE CS Config Complete event */
4594 events[5] |= 0x80; /* LE CS Procedure Enable Complete event */
4595 events[6] |= 0x01; /* LE CS Subevent Result event */
4596 events[6] |= 0x02; /* LE CS Subevent Result Continue event */
4597 events[6] |= 0x04; /* LE CS Test End Complete event */
4598 }
4599
4600 if (le_sci_capable(hdev))
4601 events[6] |= 0x40; /* LE Connection Rate Change event */
4602
4603 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
4604 sizeof(events), events, HCI_CMD_TIMEOUT);
4605}
4606
4607/* Read LE Advertising Channel TX Power */
4608static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
4609{
4610 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
4611 /* HCI TS spec forbids mixing of legacy and extended
4612 * advertising commands wherein READ_ADV_TX_POWER is
4613 * also included. So do not call it if extended adv
4614 * is supported otherwise controller will return
4615 * COMMAND_DISALLOWED for extended commands.
4616 */
4617 return __hci_cmd_sync_status(hdev,
4618 HCI_OP_LE_READ_ADV_TX_POWER,
4619 0, NULL, HCI_CMD_TIMEOUT);
4620 }
4621
4622 return 0;
4623}
4624
4625/* Read LE Min/Max Tx Power*/
4626static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
4627{
4628 if (!(hdev->commands[38] & 0x80) ||
4629 hci_test_quirk(hdev, HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER))
4630 return 0;
4631
4632 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
4633 0, NULL, HCI_CMD_TIMEOUT);
4634}
4635
4636/* Read LE Accept List Size */
4637static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
4638{
4639 if (!(hdev->commands[26] & 0x40))
4640 return 0;
4641
4642 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4643 0, NULL, HCI_CMD_TIMEOUT);
4644}
4645
4646/* Read LE Resolving List Size */
4647static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
4648{
4649 if (!(hdev->commands[34] & 0x40))
4650 return 0;
4651
4652 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
4653 0, NULL, HCI_CMD_TIMEOUT);
4654}
4655
4656/* Clear LE Resolving List */
4657static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
4658{
4659 if (!(hdev->commands[34] & 0x20))
4660 return 0;
4661
4662 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
4663 HCI_CMD_TIMEOUT);
4664}
4665
4666/* Set RPA timeout */
4667static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
4668{
4669 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
4670
4671 if (!(hdev->commands[35] & 0x04) ||
4672 hci_test_quirk(hdev, HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT))
4673 return 0;
4674
4675 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
4676 sizeof(timeout), &timeout,
4677 HCI_CMD_TIMEOUT);
4678}
4679
4680/* Read LE Maximum Data Length */
4681static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
4682{
4683 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4684 return 0;
4685
4686 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
4687 HCI_CMD_TIMEOUT);
4688}
4689
4690/* Read LE Suggested Default Data Length */
4691static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
4692{
4693 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4694 return 0;
4695
4696 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
4697 HCI_CMD_TIMEOUT);
4698}
4699
4700/* Read LE Number of Supported Advertising Sets */
4701static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
4702{
4703 if (!ext_adv_capable(hdev))
4704 return 0;
4705
4706 return __hci_cmd_sync_status(hdev,
4707 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4708 0, NULL, HCI_CMD_TIMEOUT);
4709}
4710
4711/* Write LE Host Supported */
4712static int hci_set_le_support_sync(struct hci_dev *hdev)
4713{
4714 struct hci_cp_write_le_host_supported cp;
4715
4716 /* LE-only devices do not support explicit enablement */
4717 if (!lmp_bredr_capable(hdev))
4718 return 0;
4719
4720 memset(&cp, 0, sizeof(cp));
4721
4722 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
4723 cp.le = 0x01;
4724 cp.simul = 0x00;
4725 }
4726
4727 if (cp.le == lmp_host_le_capable(hdev))
4728 return 0;
4729
4730 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
4731 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4732}
4733
4734/* LE Set Host Feature V2 */
4735static int hci_le_set_host_feature_v2_sync(struct hci_dev *hdev, u16 bit,
4736 u8 value)
4737{
4738 struct hci_cp_le_set_host_feature_v2 cp;
4739
4740 memset(&cp, 0, sizeof(cp));
4741
4742 /* Connected Isochronous Channels (Host Support) */
4743 cp.bit_number = cpu_to_le16(bit);
4744 cp.bit_value = value;
4745
4746 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE_V2,
4747 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4748}
4749
4750/* LE Set Host Feature */
4751static int hci_le_set_host_feature_sync(struct hci_dev *hdev, u16 bit, u8 value)
4752{
4753 struct hci_cp_le_set_host_feature cp;
4754
4755 if (ll_ext_feature_capable(hdev) && hdev->commands[47] & BIT(4))
4756 return hci_le_set_host_feature_v2_sync(hdev, bit, value);
4757
4758 if (bit > 255)
4759 return 0;
4760
4761 memset(&cp, 0, sizeof(cp));
4762
4763 /* Connected Isochronous Channels (Host Support) */
4764 cp.bit_number = bit;
4765 cp.bit_value = value;
4766
4767 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE,
4768 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4769}
4770
4771static int hci_le_read_conn_interval_sync(struct hci_dev *hdev)
4772{
4773 if (!le_sci_capable(hdev))
4774 return 0;
4775
4776 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_CONN_INTERVAL,
4777 0, NULL, HCI_CMD_TIMEOUT);
4778}
4779
4780static int hci_le_set_def_rate_sync(struct hci_dev *hdev)
4781{
4782 struct hci_cp_le_set_def_rate cp;
4783 u16 interval_min = 0x000a; /* 1.25 ms */
4784 u16 interval_max = 0x0078; /* 15 ms */
4785
4786 if (!le_sci_capable(hdev))
4787 return 0;
4788
4789 /* Clamp the interval range to the controller's minimum supported
4790 * connection interval (read via HCI_OP_LE_READ_CONN_INTERVAL) so the
4791 * default rate parameters are not rejected. The maximum is raised as
4792 * well if needed to keep interval_min <= interval_max.
4793 */
4794 if (hdev->le_min_rate_interval > interval_min) {
4795 interval_min = hdev->le_min_rate_interval;
4796 if (interval_min > interval_max)
4797 interval_max = interval_min;
4798 }
4799
4800 memset(&cp, 0, sizeof(cp));
4801
4802 /* Use the HIDS 1.2 recommended Full Range mode values as the default
4803 * rate parameters (see HOGP v1.2 spec). Connection intervals are in
4804 * units of 0.125 ms and the supervision timeout is in units of 10 ms.
4805 */
4806 cp.interval_min = cpu_to_le16(interval_min);
4807 cp.interval_max = cpu_to_le16(interval_max);
4808 cp.subrate_min = cpu_to_le16(0x0001);
4809 cp.subrate_max = cpu_to_le16(0x0004);
4810 cp.max_latency = cpu_to_le16(0x0000);
4811 cp.cont_num = cpu_to_le16(0x0001);
4812 cp.supv_timeout = cpu_to_le16(0x000c); /* 120 ms */
4813
4814 /* The connection event length recommended in requests by a Peripheral
4815 * uses units of 125 us with a valid range of 0x0001 to 0x7CFF
4816 * (0.125 ms to 3.999875 s), so 0x0000 cannot be used. Also note that
4817 * the Controller is not required to use these values:
4818 *
4819 * BLUETOOTH CORE SPECIFICATION Version 6.2 | Vol 4, Part E
4820 * 7.8.158. LE Set Default Rate Parameters command
4821 *
4822 * The Min_CE_Length and Max_CE_Length parameters provide the
4823 * Controller with the expected minimum and maximum length of the
4824 * connection events. The Controller is not required to use these
4825 * values.
4826 *
4827 * So it is safe to just use the minimum.
4828 */
4829 cp.min_ce_len = cpu_to_le16(0x0001);
4830 cp.max_ce_len = cpu_to_le16(0x0001);
4831
4832 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEF_RATE,
4833 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4834}
4835
4836/* Set Host Features, each feature needs to be sent separately since
4837 * HCI_OP_LE_SET_HOST_FEATURE doesn't support setting all of them at once.
4838 */
4839static int hci_le_set_host_features_sync(struct hci_dev *hdev)
4840{
4841 int err = 0;
4842
4843 if (cis_capable(hdev)) {
4844 /* Connected Isochronous Channels (Host Support) */
4845 err = hci_le_set_host_feature_sync(hdev, 32,
4846 (iso_enabled(hdev) ? 0x01 :
4847 0x00));
4848 if (err)
4849 return err;
4850 }
4851
4852 if (le_cs_capable(hdev)) {
4853 /* Channel Sounding (Host Support) */
4854 err = hci_le_set_host_feature_sync(hdev, 47, 0x01);
4855 if (err)
4856 return err;
4857 }
4858
4859 if (le_sci_capable(hdev))
4860 /* Shorter Connection Intervals (Host Support) */
4861 err = hci_le_set_host_feature_sync(hdev, 73, 0x01);
4862
4863 return err;
4864}
4865
4866/* LE Controller init stage 3 command sequence */
4867static const struct hci_init_stage le_init3[] = {
4868 /* HCI_OP_LE_SET_EVENT_MASK */
4869 HCI_INIT(hci_le_set_event_mask_sync),
4870 /* HCI_OP_LE_READ_ADV_TX_POWER */
4871 HCI_INIT(hci_le_read_adv_tx_power_sync),
4872 /* HCI_OP_LE_READ_TRANSMIT_POWER */
4873 HCI_INIT(hci_le_read_tx_power_sync),
4874 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
4875 HCI_INIT(hci_le_read_accept_list_size_sync),
4876 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
4877 HCI_INIT(hci_le_clear_accept_list_sync),
4878 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
4879 HCI_INIT(hci_le_read_resolv_list_size_sync),
4880 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
4881 HCI_INIT(hci_le_clear_resolv_list_sync),
4882 /* HCI_OP_LE_SET_RPA_TIMEOUT */
4883 HCI_INIT(hci_le_set_rpa_timeout_sync),
4884 /* HCI_OP_LE_READ_MAX_DATA_LEN */
4885 HCI_INIT(hci_le_read_max_data_len_sync),
4886 /* HCI_OP_LE_READ_DEF_DATA_LEN */
4887 HCI_INIT(hci_le_read_def_data_len_sync),
4888 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
4889 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
4890 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
4891 HCI_INIT(hci_set_le_support_sync),
4892 /* HCI_OP_LE_SET_HOST_FEATURE */
4893 HCI_INIT(hci_le_set_host_features_sync),
4894 /* HCI_OP_LE_READ_CONN_INTERVAL */
4895 HCI_INIT(hci_le_read_conn_interval_sync),
4896 /* HCI_OP_LE_SET_DEF_RATE */
4897 HCI_INIT(hci_le_set_def_rate_sync),
4898 {}
4899};
4900
4901static int hci_init3_sync(struct hci_dev *hdev)
4902{
4903 int err;
4904
4905 bt_dev_dbg(hdev, "");
4906
4907 err = hci_init_stage_sync(hdev, hci_init3);
4908 if (err)
4909 return err;
4910
4911 if (lmp_le_capable(hdev))
4912 return hci_init_stage_sync(hdev, le_init3);
4913
4914 return 0;
4915}
4916
4917static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
4918{
4919 struct hci_cp_delete_stored_link_key cp;
4920
4921 /* Some Broadcom based Bluetooth controllers do not support the
4922 * Delete Stored Link Key command. They are clearly indicating its
4923 * absence in the bit mask of supported commands.
4924 *
4925 * Check the supported commands and only if the command is marked
4926 * as supported send it. If not supported assume that the controller
4927 * does not have actual support for stored link keys which makes this
4928 * command redundant anyway.
4929 *
4930 * Some controllers indicate that they support handling deleting
4931 * stored link keys, but they don't. The quirk lets a driver
4932 * just disable this command.
4933 */
4934 if (!(hdev->commands[6] & 0x80) ||
4935 hci_test_quirk(hdev, HCI_QUIRK_BROKEN_STORED_LINK_KEY))
4936 return 0;
4937
4938 memset(&cp, 0, sizeof(cp));
4939 bacpy(&cp.bdaddr, BDADDR_ANY);
4940 cp.delete_all = 0x01;
4941
4942 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
4943 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4944}
4945
4946static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
4947{
4948 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
4949 bool changed = false;
4950
4951 /* Set event mask page 2 if the HCI command for it is supported */
4952 if (!(hdev->commands[22] & 0x04))
4953 return 0;
4954
4955 /* If Connectionless Peripheral Broadcast central role is supported
4956 * enable all necessary events for it.
4957 */
4958 if (lmp_cpb_central_capable(hdev)) {
4959 events[1] |= 0x40; /* Triggered Clock Capture */
4960 events[1] |= 0x80; /* Synchronization Train Complete */
4961 events[2] |= 0x08; /* Truncated Page Complete */
4962 events[2] |= 0x20; /* CPB Channel Map Change */
4963 changed = true;
4964 }
4965
4966 /* If Connectionless Peripheral Broadcast peripheral role is supported
4967 * enable all necessary events for it.
4968 */
4969 if (lmp_cpb_peripheral_capable(hdev)) {
4970 events[2] |= 0x01; /* Synchronization Train Received */
4971 events[2] |= 0x02; /* CPB Receive */
4972 events[2] |= 0x04; /* CPB Timeout */
4973 events[2] |= 0x10; /* Peripheral Page Response Timeout */
4974 changed = true;
4975 }
4976
4977 /* Enable Authenticated Payload Timeout Expired event if supported */
4978 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
4979 events[2] |= 0x80;
4980 changed = true;
4981 }
4982
4983 /* Some Broadcom based controllers indicate support for Set Event
4984 * Mask Page 2 command, but then actually do not support it. Since
4985 * the default value is all bits set to zero, the command is only
4986 * required if the event mask has to be changed. In case no change
4987 * to the event mask is needed, skip this command.
4988 */
4989 if (!changed)
4990 return 0;
4991
4992 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
4993 sizeof(events), events, HCI_CMD_TIMEOUT);
4994}
4995
4996/* Read local codec list if the HCI command is supported */
4997static int hci_read_local_codecs_sync(struct hci_dev *hdev)
4998{
4999 if (hdev->commands[45] & 0x04)
5000 hci_read_supported_codecs_v2(hdev);
5001 else if (hdev->commands[29] & 0x20)
5002 hci_read_supported_codecs(hdev);
5003
5004 return 0;
5005}
5006
5007/* Read local pairing options if the HCI command is supported */
5008static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
5009{
5010 if (!(hdev->commands[41] & 0x08))
5011 return 0;
5012
5013 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
5014 0, NULL, HCI_CMD_TIMEOUT);
5015}
5016
5017/* Get MWS transport configuration if the HCI command is supported */
5018static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
5019{
5020 if (!mws_transport_config_capable(hdev))
5021 return 0;
5022
5023 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
5024 0, NULL, HCI_CMD_TIMEOUT);
5025}
5026
5027/* Check for Synchronization Train support */
5028static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
5029{
5030 if (!lmp_sync_train_capable(hdev))
5031 return 0;
5032
5033 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
5034 0, NULL, HCI_CMD_TIMEOUT);
5035}
5036
5037/* Enable Secure Connections if supported and configured */
5038static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
5039{
5040 u8 support = 0x01;
5041
5042 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
5043 !bredr_sc_enabled(hdev))
5044 return 0;
5045
5046 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
5047 sizeof(support), &support,
5048 HCI_CMD_TIMEOUT);
5049}
5050
5051/* Set erroneous data reporting if supported to the wideband speech
5052 * setting value
5053 */
5054static int hci_set_err_data_report_sync(struct hci_dev *hdev)
5055{
5056 struct hci_cp_write_def_err_data_reporting cp;
5057 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
5058
5059 if (!(hdev->commands[18] & 0x08) ||
5060 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
5061 hci_test_quirk(hdev, HCI_QUIRK_BROKEN_ERR_DATA_REPORTING))
5062 return 0;
5063
5064 if (enabled == hdev->err_data_reporting)
5065 return 0;
5066
5067 memset(&cp, 0, sizeof(cp));
5068 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
5069 ERR_DATA_REPORTING_DISABLED;
5070
5071 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
5072 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5073}
5074
5075static const struct hci_init_stage hci_init4[] = {
5076 /* HCI_OP_DELETE_STORED_LINK_KEY */
5077 HCI_INIT(hci_delete_stored_link_key_sync),
5078 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
5079 HCI_INIT(hci_set_event_mask_page_2_sync),
5080 /* HCI_OP_READ_LOCAL_CODECS */
5081 HCI_INIT(hci_read_local_codecs_sync),
5082 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
5083 HCI_INIT(hci_read_local_pairing_opts_sync),
5084 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
5085 HCI_INIT(hci_get_mws_transport_config_sync),
5086 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
5087 HCI_INIT(hci_read_sync_train_params_sync),
5088 /* HCI_OP_WRITE_SC_SUPPORT */
5089 HCI_INIT(hci_write_sc_support_1_sync),
5090 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
5091 HCI_INIT(hci_set_err_data_report_sync),
5092 {}
5093};
5094
5095/* Set Suggested Default Data Length to maximum if supported */
5096static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
5097{
5098 struct hci_cp_le_write_def_data_len cp;
5099
5100 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
5101 return 0;
5102
5103 memset(&cp, 0, sizeof(cp));
5104 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
5105 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
5106
5107 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
5108 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5109}
5110
5111/* Set Default PHY parameters if command is supported, enables all supported
5112 * PHYs according to the LE Features bits.
5113 */
5114static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
5115{
5116 struct hci_cp_le_set_default_phy cp;
5117
5118 if (!(hdev->commands[35] & 0x20)) {
5119 /* If the command is not supported it means only 1M PHY is
5120 * supported.
5121 */
5122 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
5123 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
5124 return 0;
5125 }
5126
5127 memset(&cp, 0, sizeof(cp));
5128 cp.all_phys = 0x00;
5129 cp.tx_phys = HCI_LE_SET_PHY_1M;
5130 cp.rx_phys = HCI_LE_SET_PHY_1M;
5131
5132 /* Enables 2M PHY if supported */
5133 if (le_2m_capable(hdev)) {
5134 cp.tx_phys |= HCI_LE_SET_PHY_2M;
5135 cp.rx_phys |= HCI_LE_SET_PHY_2M;
5136 }
5137
5138 /* Enables Coded PHY if supported */
5139 if (le_coded_capable(hdev)) {
5140 cp.tx_phys |= HCI_LE_SET_PHY_CODED;
5141 cp.rx_phys |= HCI_LE_SET_PHY_CODED;
5142 }
5143
5144 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
5145 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5146}
5147
5148static const struct hci_init_stage le_init4[] = {
5149 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
5150 HCI_INIT(hci_le_set_write_def_data_len_sync),
5151 /* HCI_OP_LE_SET_DEFAULT_PHY */
5152 HCI_INIT(hci_le_set_default_phy_sync),
5153 {}
5154};
5155
5156static int hci_init4_sync(struct hci_dev *hdev)
5157{
5158 int err;
5159
5160 bt_dev_dbg(hdev, "");
5161
5162 err = hci_init_stage_sync(hdev, hci_init4);
5163 if (err)
5164 return err;
5165
5166 if (lmp_le_capable(hdev))
5167 return hci_init_stage_sync(hdev, le_init4);
5168
5169 return 0;
5170}
5171
5172static int hci_init_sync(struct hci_dev *hdev)
5173{
5174 int err;
5175
5176 err = hci_init1_sync(hdev);
5177 if (err < 0)
5178 return err;
5179
5180 if (hci_dev_test_flag(hdev, HCI_SETUP))
5181 hci_debugfs_create_basic(hdev);
5182
5183 err = hci_init2_sync(hdev);
5184 if (err < 0)
5185 return err;
5186
5187 err = hci_init3_sync(hdev);
5188 if (err < 0)
5189 return err;
5190
5191 err = hci_init4_sync(hdev);
5192 if (err < 0)
5193 return err;
5194
5195 /* This function is only called when the controller is actually in
5196 * configured state. When the controller is marked as unconfigured,
5197 * this initialization procedure is not run.
5198 *
5199 * It means that it is possible that a controller runs through its
5200 * setup phase and then discovers missing settings. If that is the
5201 * case, then this function will not be called. It then will only
5202 * be called during the config phase.
5203 *
5204 * So only when in setup phase or config phase, create the debugfs
5205 * entries and register the SMP channels.
5206 */
5207 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
5208 !hci_dev_test_flag(hdev, HCI_CONFIG))
5209 return 0;
5210
5211 if (hci_dev_test_and_set_flag(hdev, HCI_DEBUGFS_CREATED))
5212 return 0;
5213
5214 hci_debugfs_create_common(hdev);
5215
5216 if (lmp_bredr_capable(hdev))
5217 hci_debugfs_create_bredr(hdev);
5218
5219 if (lmp_le_capable(hdev))
5220 hci_debugfs_create_le(hdev);
5221
5222 return 0;
5223}
5224
5225#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
5226
5227static const struct {
5228 unsigned long quirk;
5229 const char *desc;
5230} hci_broken_table[] = {
5231 HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
5232 "HCI Read Local Supported Commands not supported"),
5233 HCI_QUIRK_BROKEN(STORED_LINK_KEY,
5234 "HCI Delete Stored Link Key command is advertised, "
5235 "but not supported."),
5236 HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
5237 "HCI Read Default Erroneous Data Reporting command is "
5238 "advertised, but not supported."),
5239 HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
5240 "HCI Read Transmit Power Level command is advertised, "
5241 "but not supported."),
5242 HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
5243 "HCI Set Event Filter command not supported."),
5244 HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
5245 "HCI Enhanced Setup Synchronous Connection command is "
5246 "advertised, but not supported."),
5247 HCI_QUIRK_BROKEN(SET_RPA_TIMEOUT,
5248 "HCI LE Set Random Private Address Timeout command is "
5249 "advertised, but not supported."),
5250 HCI_QUIRK_BROKEN(EXT_CREATE_CONN,
5251 "HCI LE Extended Create Connection command is "
5252 "advertised, but not supported."),
5253 HCI_QUIRK_BROKEN(WRITE_AUTH_PAYLOAD_TIMEOUT,
5254 "HCI WRITE AUTH PAYLOAD TIMEOUT command leads "
5255 "to unexpected SMP errors when pairing "
5256 "and will not be used."),
5257 HCI_QUIRK_BROKEN(LE_CODED,
5258 "HCI LE Coded PHY feature bit is set, "
5259 "but its usage is not supported.")
5260};
5261
5262/* This function handles hdev setup stage:
5263 *
5264 * Calls hdev->setup
5265 * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set.
5266 */
5267static int hci_dev_setup_sync(struct hci_dev *hdev)
5268{
5269 int ret = 0;
5270 bool invalid_bdaddr;
5271 size_t i;
5272
5273 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
5274 !hci_test_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_SETUP))
5275 return 0;
5276
5277 bt_dev_dbg(hdev, "");
5278
5279 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
5280
5281 if (hdev->setup)
5282 ret = hdev->setup(hdev);
5283
5284 for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
5285 if (hci_test_quirk(hdev, hci_broken_table[i].quirk))
5286 bt_dev_warn(hdev, "%s", hci_broken_table[i].desc);
5287 }
5288
5289 /* The transport driver can set the quirk to mark the
5290 * BD_ADDR invalid before creating the HCI device or in
5291 * its setup callback.
5292 */
5293 invalid_bdaddr = hci_test_quirk(hdev, HCI_QUIRK_INVALID_BDADDR) ||
5294 hci_test_quirk(hdev, HCI_QUIRK_USE_BDADDR_PROPERTY);
5295 if (!ret) {
5296 if (hci_test_quirk(hdev, HCI_QUIRK_USE_BDADDR_PROPERTY) &&
5297 !bacmp(&hdev->public_addr, BDADDR_ANY))
5298 hci_dev_get_bd_addr_from_property(hdev);
5299
5300 if (invalid_bdaddr && bacmp(&hdev->public_addr, BDADDR_ANY) &&
5301 hdev->set_bdaddr) {
5302 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
5303 if (!ret)
5304 invalid_bdaddr = false;
5305 }
5306 }
5307
5308 /* The transport driver can set these quirks before
5309 * creating the HCI device or in its setup callback.
5310 *
5311 * For the invalid BD_ADDR quirk it is possible that
5312 * it becomes a valid address if the bootloader does
5313 * provide it (see above).
5314 *
5315 * In case any of them is set, the controller has to
5316 * start up as unconfigured.
5317 */
5318 if (hci_test_quirk(hdev, HCI_QUIRK_EXTERNAL_CONFIG) ||
5319 invalid_bdaddr)
5320 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
5321
5322 /* For an unconfigured controller it is required to
5323 * read at least the version information provided by
5324 * the Read Local Version Information command.
5325 *
5326 * If the set_bdaddr driver callback is provided, then
5327 * also the original Bluetooth public device address
5328 * will be read using the Read BD Address command.
5329 */
5330 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5331 return hci_unconf_init_sync(hdev);
5332
5333 return ret;
5334}
5335
5336/* This function handles hdev init stage:
5337 *
5338 * Calls hci_dev_setup_sync to perform setup stage
5339 * Calls hci_init_sync to perform HCI command init sequence
5340 */
5341static int hci_dev_init_sync(struct hci_dev *hdev)
5342{
5343 int ret;
5344
5345 bt_dev_dbg(hdev, "");
5346
5347 atomic_set(&hdev->cmd_cnt, 1);
5348 set_bit(HCI_INIT, &hdev->flags);
5349
5350 ret = hci_dev_setup_sync(hdev);
5351
5352 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
5353 /* If public address change is configured, ensure that
5354 * the address gets programmed. If the driver does not
5355 * support changing the public address, fail the power
5356 * on procedure.
5357 */
5358 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
5359 hdev->set_bdaddr)
5360 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
5361 else
5362 ret = -EADDRNOTAVAIL;
5363 }
5364
5365 if (!ret) {
5366 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
5367 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5368 ret = hci_init_sync(hdev);
5369 if (!ret && hdev->post_init)
5370 ret = hdev->post_init(hdev);
5371 }
5372 }
5373
5374 /* If the HCI Reset command is clearing all diagnostic settings,
5375 * then they need to be reprogrammed after the init procedure
5376 * completed.
5377 */
5378 if (hci_test_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_DIAG) &&
5379 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5380 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
5381 ret = hdev->set_diag(hdev, true);
5382
5383 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5384 msft_do_open(hdev);
5385 aosp_do_open(hdev);
5386 }
5387
5388 clear_bit(HCI_INIT, &hdev->flags);
5389
5390 return ret;
5391}
5392
5393int hci_dev_open_sync(struct hci_dev *hdev)
5394{
5395 int ret;
5396
5397 bt_dev_dbg(hdev, "");
5398
5399 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
5400 ret = -ENODEV;
5401 goto done;
5402 }
5403
5404 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
5405 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
5406 /* Check for rfkill but allow the HCI setup stage to
5407 * proceed (which in itself doesn't cause any RF activity).
5408 */
5409 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
5410 ret = -ERFKILL;
5411 goto done;
5412 }
5413
5414 /* Check for valid public address or a configured static
5415 * random address, but let the HCI setup proceed to
5416 * be able to determine if there is a public address
5417 * or not.
5418 *
5419 * In case of user channel usage, it is not important
5420 * if a public address or static random address is
5421 * available.
5422 */
5423 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5424 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
5425 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
5426 ret = -EADDRNOTAVAIL;
5427 goto done;
5428 }
5429 }
5430
5431 if (test_bit(HCI_UP, &hdev->flags)) {
5432 ret = -EALREADY;
5433 goto done;
5434 }
5435
5436 if (hdev->open(hdev)) {
5437 ret = -EIO;
5438 goto done;
5439 }
5440
5441 hci_devcd_reset(hdev);
5442
5443 set_bit(HCI_RUNNING, &hdev->flags);
5444 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
5445
5446 ret = hci_dev_init_sync(hdev);
5447 if (!ret) {
5448 hci_dev_hold(hdev);
5449 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
5450 hci_adv_instances_set_rpa_expired(hdev, true);
5451 set_bit(HCI_UP, &hdev->flags);
5452 hci_sock_dev_event(hdev, HCI_DEV_UP);
5453 hci_leds_update_powered(hdev, true);
5454 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
5455 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
5456 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
5457 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5458 hci_dev_test_flag(hdev, HCI_MGMT)) {
5459 ret = hci_powered_update_sync(hdev);
5460 mgmt_power_on(hdev, ret);
5461 }
5462 } else {
5463 /* Init failed, cleanup */
5464 flush_work(&hdev->tx_work);
5465
5466 /* Since hci_rx_work() is possible to awake new cmd_work
5467 * it should be flushed first to avoid unexpected call of
5468 * hci_cmd_work()
5469 */
5470 flush_work(&hdev->rx_work);
5471 flush_work(&hdev->cmd_work);
5472
5473 skb_queue_purge(&hdev->cmd_q);
5474 skb_queue_purge(&hdev->rx_q);
5475
5476 if (hdev->flush)
5477 hdev->flush(hdev);
5478
5479 if (hdev->sent_cmd) {
5480 cancel_delayed_work_sync(&hdev->cmd_timer);
5481 kfree_skb(hdev->sent_cmd);
5482 hdev->sent_cmd = NULL;
5483 }
5484
5485 if (hdev->req_skb) {
5486 kfree_skb(hdev->req_skb);
5487 hdev->req_skb = NULL;
5488 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
5489 }
5490
5491 clear_bit(HCI_RUNNING, &hdev->flags);
5492 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
5493
5494 hdev->close(hdev);
5495 hdev->flags &= BIT(HCI_RAW);
5496 }
5497
5498done:
5499 return ret;
5500}
5501
5502/* This function requires the caller holds hdev->lock */
5503static void hci_pend_le_actions_clear(struct hci_dev *hdev)
5504{
5505 struct hci_conn_params *p;
5506
5507 list_for_each_entry(p, &hdev->le_conn_params, list) {
5508 hci_pend_le_list_del_init(p);
5509 if (p->conn) {
5510 hci_conn_drop(p->conn);
5511 hci_conn_put(p->conn);
5512 p->conn = NULL;
5513 }
5514 }
5515
5516 BT_DBG("All LE pending actions cleared");
5517}
5518
5519static int hci_dev_shutdown(struct hci_dev *hdev)
5520{
5521 int err = 0;
5522 /* Similar to how we first do setup and then set the exclusive access
5523 * bit for userspace, we must first unset userchannel and then clean up.
5524 * Otherwise, the kernel can't properly use the hci channel to clean up
5525 * the controller (some shutdown routines require sending additional
5526 * commands to the controller for example).
5527 */
5528 bool was_userchannel =
5529 hci_dev_test_and_clear_flag(hdev, HCI_USER_CHANNEL);
5530
5531 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
5532 test_bit(HCI_UP, &hdev->flags)) {
5533 /* Execute vendor specific shutdown routine */
5534 if (hdev->shutdown)
5535 err = hdev->shutdown(hdev);
5536 }
5537
5538 if (was_userchannel)
5539 hci_dev_set_flag(hdev, HCI_USER_CHANNEL);
5540
5541 return err;
5542}
5543
5544int hci_dev_close_sync(struct hci_dev *hdev)
5545{
5546 bool auto_off;
5547 int err = 0;
5548
5549 bt_dev_dbg(hdev, "");
5550
5551 /* Set HCI_DRAIN_WORKQUEUE flag to prevent queuing work during
5552 * reset/close. See hci_cmd_work() and handle_cmd_cnt_and_timer().
5553 */
5554 hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
5555 synchronize_rcu();
5556
5557 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
5558 disable_delayed_work(&hdev->power_off);
5559 disable_delayed_work(&hdev->ncmd_timer);
5560 disable_delayed_work(&hdev->le_scan_disable);
5561 } else {
5562 cancel_delayed_work(&hdev->power_off);
5563 cancel_delayed_work(&hdev->ncmd_timer);
5564 cancel_delayed_work(&hdev->le_scan_disable);
5565 }
5566
5567 hci_cmd_sync_cancel_sync(hdev, ENODEV);
5568
5569 cancel_interleave_scan(hdev);
5570
5571 if (hdev->adv_instance_timeout) {
5572 cancel_delayed_work_sync(&hdev->adv_instance_expire);
5573 hdev->adv_instance_timeout = 0;
5574 }
5575
5576 err = hci_dev_shutdown(hdev);
5577
5578 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
5579 cancel_delayed_work_sync(&hdev->cmd_timer);
5580 hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
5581 return err;
5582 }
5583
5584 hci_leds_update_powered(hdev, false);
5585
5586 /* Flush RX and TX works */
5587 flush_work(&hdev->tx_work);
5588 flush_work(&hdev->rx_work);
5589
5590 if (hdev->discov_timeout > 0) {
5591 hdev->discov_timeout = 0;
5592 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
5593 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
5594 }
5595
5596 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
5597 cancel_delayed_work(&hdev->service_cache);
5598
5599 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
5600 struct adv_info *adv_instance;
5601
5602 cancel_delayed_work_sync(&hdev->rpa_expired);
5603
5604 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
5605 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
5606 }
5607
5608 /* Avoid potential lockdep warnings from the *_flush() calls by
5609 * ensuring the workqueue is empty up front.
5610 */
5611 drain_workqueue(hdev->workqueue);
5612
5613 hci_dev_lock(hdev);
5614
5615 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
5616
5617 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
5618
5619 if (!auto_off && !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5620 hci_dev_test_flag(hdev, HCI_MGMT))
5621 __mgmt_power_off(hdev);
5622
5623 hci_inquiry_cache_flush(hdev);
5624 hci_pend_le_actions_clear(hdev);
5625 hci_conn_hash_flush(hdev);
5626 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
5627 smp_unregister(hdev);
5628 hci_dev_unlock(hdev);
5629
5630 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
5631
5632 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5633 aosp_do_close(hdev);
5634 msft_do_close(hdev);
5635 }
5636
5637 if (hdev->flush)
5638 hdev->flush(hdev);
5639
5640 /* Reset device */
5641 skb_queue_purge(&hdev->cmd_q);
5642 atomic_set(&hdev->cmd_cnt, 1);
5643 hdev->acl_cnt = 0;
5644 hdev->sco_cnt = 0;
5645 hdev->le_cnt = 0;
5646 hdev->iso_cnt = 0;
5647 if (hci_test_quirk(hdev, HCI_QUIRK_RESET_ON_CLOSE) &&
5648 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
5649 set_bit(HCI_INIT, &hdev->flags);
5650 hci_reset_sync(hdev);
5651 clear_bit(HCI_INIT, &hdev->flags);
5652 }
5653
5654 /* flush cmd work */
5655 flush_work(&hdev->cmd_work);
5656
5657 /* Drop queues */
5658 skb_queue_purge(&hdev->rx_q);
5659 skb_queue_purge(&hdev->cmd_q);
5660 skb_queue_purge(&hdev->raw_q);
5661
5662 /* Drop last sent command */
5663 if (hdev->sent_cmd) {
5664 cancel_delayed_work_sync(&hdev->cmd_timer);
5665 kfree_skb(hdev->sent_cmd);
5666 hdev->sent_cmd = NULL;
5667 }
5668
5669 /* Drop last request */
5670 if (hdev->req_skb) {
5671 kfree_skb(hdev->req_skb);
5672 hdev->req_skb = NULL;
5673 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
5674 }
5675
5676 clear_bit(HCI_RUNNING, &hdev->flags);
5677 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
5678
5679 /* After this point our queues are empty and no tasks are scheduled. */
5680 hdev->close(hdev);
5681
5682 /* Clear flags */
5683 hdev->flags &= BIT(HCI_RAW);
5684 hci_dev_clear_volatile_flags(hdev);
5685 hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
5686
5687 memset(hdev->eir, 0, sizeof(hdev->eir));
5688 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
5689 bacpy(&hdev->random_addr, BDADDR_ANY);
5690 hci_dev_lock(hdev);
5691 hci_codec_list_clear(&hdev->local_codecs);
5692 hci_dev_unlock(hdev);
5693
5694 hci_dev_put(hdev);
5695 return err;
5696}
5697
5698/* This function perform power on HCI command sequence as follows:
5699 *
5700 * If controller is already up (HCI_UP) performs hci_powered_update_sync
5701 * sequence otherwise run hci_dev_open_sync which will follow with
5702 * hci_powered_update_sync after the init sequence is completed.
5703 */
5704static int hci_power_on_sync(struct hci_dev *hdev)
5705{
5706 int err;
5707
5708 if (test_bit(HCI_UP, &hdev->flags) &&
5709 hci_dev_test_flag(hdev, HCI_MGMT) &&
5710 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
5711 cancel_delayed_work(&hdev->power_off);
5712 return hci_powered_update_sync(hdev);
5713 }
5714
5715 err = hci_dev_open_sync(hdev);
5716 if (err < 0)
5717 return err;
5718
5719 /* During the HCI setup phase, a few error conditions are
5720 * ignored and they need to be checked now. If they are still
5721 * valid, it is important to return the device back off.
5722 */
5723 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
5724 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
5725 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
5726 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
5727 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
5728 hci_dev_close_sync(hdev);
5729 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
5730 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
5731 HCI_AUTO_OFF_TIMEOUT);
5732 }
5733
5734 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
5735 /* For unconfigured devices, set the HCI_RAW flag
5736 * so that userspace can easily identify them.
5737 */
5738 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5739 set_bit(HCI_RAW, &hdev->flags);
5740
5741 /* For fully configured devices, this will send
5742 * the Index Added event. For unconfigured devices,
5743 * it will send Unconfigued Index Added event.
5744 *
5745 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
5746 * and no event will be send.
5747 */
5748 mgmt_index_added(hdev);
5749 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
5750 /* When the controller is now configured, then it
5751 * is important to clear the HCI_RAW flag.
5752 */
5753 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5754 clear_bit(HCI_RAW, &hdev->flags);
5755
5756 /* Powering on the controller with HCI_CONFIG set only
5757 * happens with the transition from unconfigured to
5758 * configured. This will send the Index Added event.
5759 */
5760 mgmt_index_added(hdev);
5761 }
5762
5763 return 0;
5764}
5765
5766static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
5767{
5768 struct hci_cp_remote_name_req_cancel cp;
5769
5770 memset(&cp, 0, sizeof(cp));
5771 bacpy(&cp.bdaddr, addr);
5772
5773 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
5774 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5775}
5776
5777int hci_stop_discovery_sync(struct hci_dev *hdev)
5778{
5779 struct discovery_state *d = &hdev->discovery;
5780 struct inquiry_entry *e;
5781 bdaddr_t addr;
5782 int err;
5783
5784 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
5785
5786 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
5787 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
5788 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
5789 0, NULL, HCI_CMD_TIMEOUT);
5790 if (err)
5791 return err;
5792 }
5793
5794 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5795 cancel_delayed_work(&hdev->le_scan_disable);
5796
5797 err = hci_scan_disable_sync(hdev);
5798 if (err)
5799 return err;
5800 }
5801
5802 } else {
5803 err = hci_scan_disable_sync(hdev);
5804 if (err)
5805 return err;
5806 }
5807
5808 /* Resume advertising if it was paused */
5809 if (ll_privacy_capable(hdev))
5810 hci_resume_advertising_sync(hdev);
5811
5812 /* No further actions needed for LE-only discovery */
5813 if (d->type == DISCOV_TYPE_LE)
5814 return 0;
5815
5816 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
5817 hci_dev_lock(hdev);
5818 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
5819 NAME_PENDING);
5820 if (!e) {
5821 hci_dev_unlock(hdev);
5822 return 0;
5823 }
5824
5825 bacpy(&addr, &e->data.bdaddr);
5826 hci_dev_unlock(hdev);
5827
5828 /* Ignore cancel errors since it should interfere with stopping
5829 * of the discovery.
5830 */
5831 hci_remote_name_cancel_sync(hdev, &addr);
5832 }
5833
5834 return 0;
5835}
5836
5837static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
5838 u8 reason)
5839{
5840 struct hci_cp_disconnect cp;
5841
5842 if (conn->type == BIS_LINK || conn->type == PA_LINK) {
5843 /* This is a BIS connection, hci_conn_del will
5844 * do the necessary cleanup.
5845 */
5846 hci_dev_lock(hdev);
5847 hci_conn_failed(conn, reason);
5848 hci_dev_unlock(hdev);
5849
5850 return 0;
5851 }
5852
5853 memset(&cp, 0, sizeof(cp));
5854 cp.handle = cpu_to_le16(conn->handle);
5855 cp.reason = reason;
5856
5857 /* Wait for HCI_EV_DISCONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5858 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5859 * used when suspending or powering off, where we don't want to wait
5860 * for the peer's response.
5861 */
5862 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5863 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
5864 sizeof(cp), &cp,
5865 HCI_EV_DISCONN_COMPLETE,
5866 HCI_CMD_TIMEOUT, NULL);
5867
5868 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
5869 HCI_CMD_TIMEOUT);
5870}
5871
5872static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
5873 struct hci_conn *conn, u8 reason)
5874{
5875 /* Return reason if scanning since the connection shall probably be
5876 * cleanup directly.
5877 */
5878 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
5879 return reason;
5880
5881 if (conn->role == HCI_ROLE_SLAVE ||
5882 test_and_set_bit(HCI_CONN_CANCEL, &conn->flags))
5883 return 0;
5884
5885 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
5886 0, NULL, HCI_CMD_TIMEOUT);
5887}
5888
5889static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn,
5890 u8 reason)
5891{
5892 if (conn->type == LE_LINK)
5893 return hci_le_connect_cancel_sync(hdev, conn, reason);
5894
5895 if (conn->type == CIS_LINK) {
5896 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
5897 * page 1857:
5898 *
5899 * If this command is issued for a CIS on the Central and the
5900 * CIS is successfully terminated before being established,
5901 * then an HCI_LE_CIS_Established event shall also be sent for
5902 * this CIS with the Status Operation Cancelled by Host (0x44).
5903 */
5904 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
5905 return hci_disconnect_sync(hdev, conn, reason);
5906
5907 /* CIS with no Create CIS sent have nothing to cancel */
5908 return HCI_ERROR_LOCAL_HOST_TERM;
5909 }
5910
5911 if (conn->type == BIS_LINK || conn->type == PA_LINK) {
5912 /* There is no way to cancel a BIS without terminating the BIG
5913 * which is done later on connection cleanup.
5914 */
5915 return 0;
5916 }
5917
5918 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
5919 return 0;
5920
5921 /* Wait for HCI_EV_CONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5922 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5923 * used when suspending or powering off, where we don't want to wait
5924 * for the peer's response.
5925 */
5926 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5927 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN_CANCEL,
5928 6, &conn->dst,
5929 HCI_EV_CONN_COMPLETE,
5930 HCI_CMD_TIMEOUT, NULL);
5931
5932 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
5933 6, &conn->dst, HCI_CMD_TIMEOUT);
5934}
5935
5936static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
5937 u8 reason)
5938{
5939 struct hci_cp_reject_sync_conn_req cp;
5940
5941 memset(&cp, 0, sizeof(cp));
5942 bacpy(&cp.bdaddr, &conn->dst);
5943 cp.reason = reason;
5944
5945 /* SCO rejection has its own limited set of
5946 * allowed error values (0x0D-0x0F).
5947 */
5948 if (reason < 0x0d || reason > 0x0f)
5949 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
5950
5951 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
5952 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5953}
5954
5955static int hci_le_reject_cis_sync(struct hci_dev *hdev, struct hci_conn *conn,
5956 u8 reason)
5957{
5958 struct hci_cp_le_reject_cis cp;
5959
5960 memset(&cp, 0, sizeof(cp));
5961 cp.handle = cpu_to_le16(conn->handle);
5962 cp.reason = reason;
5963
5964 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REJECT_CIS,
5965 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5966}
5967
5968static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
5969 u8 reason)
5970{
5971 struct hci_cp_reject_conn_req cp;
5972
5973 if (conn->type == CIS_LINK)
5974 return hci_le_reject_cis_sync(hdev, conn, reason);
5975
5976 if (conn->type == BIS_LINK || conn->type == PA_LINK)
5977 return -EINVAL;
5978
5979 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
5980 return hci_reject_sco_sync(hdev, conn, reason);
5981
5982 memset(&cp, 0, sizeof(cp));
5983 bacpy(&cp.bdaddr, &conn->dst);
5984 cp.reason = reason;
5985
5986 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
5987 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5988}
5989
5990int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
5991{
5992 int err = 0;
5993 u16 handle = conn->handle;
5994 bool disconnect = false;
5995 struct hci_conn *c;
5996
5997 switch (conn->state) {
5998 case BT_CONNECTED:
5999 case BT_CONFIG:
6000 err = hci_disconnect_sync(hdev, conn, reason);
6001 break;
6002 case BT_CONNECT:
6003 err = hci_connect_cancel_sync(hdev, conn, reason);
6004 break;
6005 case BT_CONNECT2:
6006 err = hci_reject_conn_sync(hdev, conn, reason);
6007 break;
6008 case BT_OPEN:
6009 case BT_BOUND:
6010 break;
6011 default:
6012 disconnect = true;
6013 break;
6014 }
6015
6016 hci_dev_lock(hdev);
6017
6018 /* Check if the connection has been cleaned up concurrently */
6019 c = hci_conn_hash_lookup_handle(hdev, handle);
6020 if (!c || c != conn) {
6021 err = 0;
6022 goto unlock;
6023 }
6024
6025 /* Cleanup hci_conn object if it cannot be cancelled as it
6026 * likely means the controller and host stack are out of sync
6027 * or in case of LE it was still scanning so it can be cleanup
6028 * safely.
6029 */
6030 if (disconnect) {
6031 conn->state = BT_CLOSED;
6032 hci_disconn_cfm(conn, reason);
6033 hci_conn_del(conn);
6034 } else {
6035 hci_conn_failed(conn, reason);
6036 }
6037
6038unlock:
6039 hci_dev_unlock(hdev);
6040 return err;
6041}
6042
6043static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
6044{
6045 struct list_head *head = &hdev->conn_hash.list;
6046 struct hci_conn *conn;
6047
6048 rcu_read_lock();
6049 while ((conn = list_first_or_null_rcu(head, struct hci_conn, list))) {
6050 /* Make sure the connection is not freed while unlocking */
6051 conn = hci_conn_get(conn);
6052 rcu_read_unlock();
6053 /* Disregard possible errors since hci_conn_del shall have been
6054 * called even in case of errors had occurred since it would
6055 * then cause hci_conn_failed to be called which calls
6056 * hci_conn_del internally.
6057 */
6058 hci_abort_conn_sync(hdev, conn, reason);
6059 hci_conn_put(conn);
6060 rcu_read_lock();
6061 }
6062 rcu_read_unlock();
6063
6064 return 0;
6065}
6066
6067/* This function perform power off HCI command sequence as follows:
6068 *
6069 * Clear Advertising
6070 * Stop Discovery
6071 * Disconnect all connections
6072 * hci_dev_close_sync
6073 */
6074static int hci_power_off_sync(struct hci_dev *hdev)
6075{
6076 int err;
6077
6078 /* If controller is already down there is nothing to do */
6079 if (!test_bit(HCI_UP, &hdev->flags))
6080 return 0;
6081
6082 hci_dev_set_flag(hdev, HCI_POWERING_DOWN);
6083
6084 if (test_bit(HCI_ISCAN, &hdev->flags) ||
6085 test_bit(HCI_PSCAN, &hdev->flags)) {
6086 err = hci_write_scan_enable_sync(hdev, 0x00);
6087 if (err)
6088 goto out;
6089 }
6090
6091 err = hci_clear_adv_sync(hdev, NULL, false);
6092 if (err)
6093 goto out;
6094
6095 err = hci_stop_discovery_sync(hdev);
6096 if (err)
6097 goto out;
6098
6099 /* Terminated due to Power Off */
6100 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
6101 if (err)
6102 goto out;
6103
6104 err = hci_dev_close_sync(hdev);
6105
6106out:
6107 hci_dev_clear_flag(hdev, HCI_POWERING_DOWN);
6108 return err;
6109}
6110
6111int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
6112{
6113 if (val)
6114 return hci_power_on_sync(hdev);
6115
6116 return hci_power_off_sync(hdev);
6117}
6118
6119static int hci_write_iac_sync(struct hci_dev *hdev)
6120{
6121 struct hci_cp_write_current_iac_lap cp;
6122
6123 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
6124 return 0;
6125
6126 memset(&cp, 0, sizeof(cp));
6127
6128 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
6129 /* Limited discoverable mode */
6130 cp.num_iac = min_t(u8, hdev->num_iac, 2);
6131 cp.iac_lap[0] = 0x00; /* LIAC */
6132 cp.iac_lap[1] = 0x8b;
6133 cp.iac_lap[2] = 0x9e;
6134 cp.iac_lap[3] = 0x33; /* GIAC */
6135 cp.iac_lap[4] = 0x8b;
6136 cp.iac_lap[5] = 0x9e;
6137 } else {
6138 /* General discoverable mode */
6139 cp.num_iac = 1;
6140 cp.iac_lap[0] = 0x33; /* GIAC */
6141 cp.iac_lap[1] = 0x8b;
6142 cp.iac_lap[2] = 0x9e;
6143 }
6144
6145 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
6146 (cp.num_iac * 3) + 1, &cp,
6147 HCI_CMD_TIMEOUT);
6148}
6149
6150int hci_update_discoverable_sync(struct hci_dev *hdev)
6151{
6152 int err = 0;
6153
6154 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
6155 err = hci_write_iac_sync(hdev);
6156 if (err)
6157 return err;
6158
6159 err = hci_update_scan_sync(hdev);
6160 if (err)
6161 return err;
6162
6163 err = hci_update_class_sync(hdev);
6164 if (err)
6165 return err;
6166 }
6167
6168 /* Advertising instances don't use the global discoverable setting, so
6169 * only update AD if advertising was enabled using Set Advertising.
6170 */
6171 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
6172 err = hci_update_adv_data_sync(hdev, 0x00);
6173 if (err)
6174 return err;
6175
6176 /* Discoverable mode affects the local advertising
6177 * address in limited privacy mode.
6178 */
6179 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
6180 if (ext_adv_capable(hdev))
6181 err = hci_start_ext_adv_sync(hdev, 0x00);
6182 else
6183 err = hci_enable_advertising_sync(hdev);
6184 }
6185 }
6186
6187 return err;
6188}
6189
6190static int update_discoverable_sync(struct hci_dev *hdev, void *data)
6191{
6192 return hci_update_discoverable_sync(hdev);
6193}
6194
6195int hci_update_discoverable(struct hci_dev *hdev)
6196{
6197 /* Only queue if it would have any effect */
6198 if (hdev_is_powered(hdev) &&
6199 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
6200 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
6201 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
6202 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
6203 NULL);
6204
6205 return 0;
6206}
6207
6208int hci_update_connectable_sync(struct hci_dev *hdev)
6209{
6210 int err;
6211
6212 err = hci_update_scan_sync(hdev);
6213 if (err)
6214 return err;
6215
6216 /* If BR/EDR is not enabled and we disable advertising as a
6217 * by-product of disabling connectable, we need to update the
6218 * advertising flags.
6219 */
6220 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
6221 err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
6222
6223 /* Update the advertising parameters if necessary */
6224 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
6225 !list_empty(&hdev->adv_instances)) {
6226 if (ext_adv_capable(hdev))
6227 err = hci_start_ext_adv_sync(hdev,
6228 hdev->cur_adv_instance);
6229 else
6230 err = hci_enable_advertising_sync(hdev);
6231
6232 if (err)
6233 return err;
6234 }
6235
6236 return hci_update_passive_scan_sync(hdev);
6237}
6238
6239int hci_inquiry_sync(struct hci_dev *hdev, u8 length, u8 num_rsp)
6240{
6241 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
6242 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
6243 struct hci_cp_inquiry cp;
6244
6245 bt_dev_dbg(hdev, "");
6246
6247 if (test_bit(HCI_INQUIRY, &hdev->flags))
6248 return 0;
6249
6250 hci_dev_lock(hdev);
6251 hci_inquiry_cache_flush(hdev);
6252 hci_dev_unlock(hdev);
6253
6254 memset(&cp, 0, sizeof(cp));
6255
6256 if (hdev->discovery.limited)
6257 memcpy(&cp.lap, liac, sizeof(cp.lap));
6258 else
6259 memcpy(&cp.lap, giac, sizeof(cp.lap));
6260
6261 cp.length = length;
6262 cp.num_rsp = num_rsp;
6263
6264 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
6265 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6266}
6267
6268static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
6269{
6270 u8 own_addr_type;
6271 /* Accept list is not used for discovery */
6272 u8 filter_policy = 0x00;
6273 /* Default is to enable duplicates filter */
6274 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
6275 int err;
6276
6277 bt_dev_dbg(hdev, "");
6278
6279 /* If controller is scanning, it means the passive scanning is
6280 * running. Thus, we should temporarily stop it in order to set the
6281 * discovery scanning parameters.
6282 */
6283 err = hci_scan_disable_sync(hdev);
6284 if (err) {
6285 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
6286 return err;
6287 }
6288
6289 cancel_interleave_scan(hdev);
6290
6291 /* Pause address resolution for active scan and stop advertising if
6292 * privacy is enabled.
6293 */
6294 err = hci_pause_addr_resolution(hdev);
6295 if (err)
6296 goto failed;
6297
6298 /* All active scans will be done with either a resolvable private
6299 * address (when privacy feature has been enabled) or non-resolvable
6300 * private address.
6301 */
6302 err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
6303 &own_addr_type);
6304 if (err < 0)
6305 own_addr_type = ADDR_LE_DEV_PUBLIC;
6306
6307 if (hci_is_adv_monitoring(hdev) ||
6308 (hci_test_quirk(hdev, HCI_QUIRK_STRICT_DUPLICATE_FILTER) &&
6309 hdev->discovery.result_filtering)) {
6310 /* Duplicate filter should be disabled when some advertisement
6311 * monitor is activated, otherwise AdvMon can only receive one
6312 * advertisement for one peer(*) during active scanning, and
6313 * might report loss to these peers.
6314 *
6315 * If controller does strict duplicate filtering and the
6316 * discovery requires result filtering disables controller based
6317 * filtering since that can cause reports that would match the
6318 * host filter to not be reported.
6319 */
6320 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
6321 }
6322
6323 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
6324 hdev->le_scan_window_discovery,
6325 own_addr_type, filter_policy, filter_dup);
6326 if (!err)
6327 return err;
6328
6329failed:
6330 /* Resume advertising if it was paused */
6331 if (ll_privacy_capable(hdev))
6332 hci_resume_advertising_sync(hdev);
6333
6334 /* Resume passive scanning */
6335 hci_update_passive_scan_sync(hdev);
6336 return err;
6337}
6338
6339static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
6340{
6341 int err;
6342
6343 bt_dev_dbg(hdev, "");
6344
6345 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
6346 if (err)
6347 return err;
6348
6349 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN, 0);
6350}
6351
6352int hci_start_discovery_sync(struct hci_dev *hdev)
6353{
6354 unsigned long timeout;
6355 int err;
6356
6357 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
6358
6359 switch (hdev->discovery.type) {
6360 case DISCOV_TYPE_BREDR:
6361 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN, 0);
6362 case DISCOV_TYPE_INTERLEAVED:
6363 /* When running simultaneous discovery, the LE scanning time
6364 * should occupy the whole discovery time sine BR/EDR inquiry
6365 * and LE scanning are scheduled by the controller.
6366 *
6367 * For interleaving discovery in comparison, BR/EDR inquiry
6368 * and LE scanning are done sequentially with separate
6369 * timeouts.
6370 */
6371 if (hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY)) {
6372 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
6373 /* During simultaneous discovery, we double LE scan
6374 * interval. We must leave some time for the controller
6375 * to do BR/EDR inquiry.
6376 */
6377 err = hci_start_interleaved_discovery_sync(hdev);
6378 break;
6379 }
6380
6381 timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
6382 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
6383 break;
6384 case DISCOV_TYPE_LE:
6385 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
6386 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
6387 break;
6388 default:
6389 return -EINVAL;
6390 }
6391
6392 if (err)
6393 return err;
6394
6395 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
6396
6397 queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
6398 timeout);
6399 return 0;
6400}
6401
6402static void hci_suspend_monitor_sync(struct hci_dev *hdev)
6403{
6404 switch (hci_get_adv_monitor_offload_ext(hdev)) {
6405 case HCI_ADV_MONITOR_EXT_MSFT:
6406 msft_suspend_sync(hdev);
6407 break;
6408 default:
6409 return;
6410 }
6411}
6412
6413/* This function disables discovery and mark it as paused */
6414static int hci_pause_discovery_sync(struct hci_dev *hdev)
6415{
6416 int old_state = hdev->discovery.state;
6417 int err;
6418
6419 /* If discovery already stopped/stopping/paused there nothing to do */
6420 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
6421 hdev->discovery_paused)
6422 return 0;
6423
6424 hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
6425 err = hci_stop_discovery_sync(hdev);
6426 if (err)
6427 return err;
6428
6429 hdev->discovery_paused = true;
6430 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
6431
6432 return 0;
6433}
6434
6435static int hci_update_event_filter_sync(struct hci_dev *hdev)
6436{
6437 struct bdaddr_list_with_flags *b;
6438 bdaddr_t *accept_list;
6439 size_t i, num_entries = 0;
6440 u8 scan = SCAN_DISABLED;
6441 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
6442 int err;
6443
6444 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
6445 return 0;
6446
6447 /* Some fake CSR controllers lock up after setting this type of
6448 * filter, so avoid sending the request altogether.
6449 */
6450 if (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL))
6451 return 0;
6452
6453 /* Always clear event filter when starting */
6454 hci_clear_event_filter_sync(hdev);
6455
6456 hci_dev_lock(hdev);
6457
6458 list_for_each_entry(b, &hdev->accept_list, list)
6459 if (b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)
6460 num_entries++;
6461
6462 if (!num_entries) {
6463 hci_dev_unlock(hdev);
6464 goto update_scan;
6465 }
6466
6467 accept_list = kmalloc_objs(*accept_list, num_entries);
6468 if (!accept_list) {
6469 hci_dev_unlock(hdev);
6470 return -ENOMEM;
6471 }
6472
6473 i = 0;
6474 list_for_each_entry(b, &hdev->accept_list, list)
6475 if (b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)
6476 bacpy(&accept_list[i++], &b->bdaddr);
6477
6478 hci_dev_unlock(hdev);
6479
6480 for (i = 0; i < num_entries; i++) {
6481 bt_dev_dbg(hdev, "Adding event filters for %pMR",
6482 &accept_list[i]);
6483
6484 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
6485 HCI_CONN_SETUP_ALLOW_BDADDR,
6486 &accept_list[i],
6487 HCI_CONN_SETUP_AUTO_ON);
6488 if (err)
6489 bt_dev_err(hdev, "Failed to set event filter for %pMR",
6490 &accept_list[i]);
6491 else
6492 scan = SCAN_PAGE;
6493 }
6494
6495 kfree(accept_list);
6496
6497update_scan:
6498 if (scan && !scanning)
6499 hci_write_scan_enable_sync(hdev, scan);
6500 else if (!scan && scanning)
6501 hci_write_scan_enable_sync(hdev, scan);
6502
6503 return 0;
6504}
6505
6506/* This function disables scan (BR and LE) and mark it as paused */
6507static int hci_pause_scan_sync(struct hci_dev *hdev)
6508{
6509 if (hdev->scanning_paused)
6510 return 0;
6511
6512 /* Disable page scan if enabled */
6513 if (test_bit(HCI_PSCAN, &hdev->flags))
6514 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
6515
6516 hci_scan_disable_sync(hdev);
6517
6518 hdev->scanning_paused = true;
6519
6520 return 0;
6521}
6522
6523/* This function performs the HCI suspend procedures in the follow order:
6524 *
6525 * Pause discovery (active scanning/inquiry)
6526 * Pause Directed Advertising/Advertising
6527 * Pause Scanning (passive scanning in case discovery was not active)
6528 * Disconnect all connections
6529 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
6530 * otherwise:
6531 * Update event mask (only set events that are allowed to wake up the host)
6532 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
6533 * Update passive scanning (lower duty cycle)
6534 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
6535 */
6536int hci_suspend_sync(struct hci_dev *hdev)
6537{
6538 int err;
6539
6540 /* If marked as suspended there nothing to do */
6541 if (hdev->suspended)
6542 return 0;
6543
6544 /* Mark device as suspended */
6545 hdev->suspended = true;
6546
6547 /* Pause discovery if not already stopped */
6548 hci_pause_discovery_sync(hdev);
6549
6550 /* Pause other advertisements */
6551 hci_pause_advertising_sync(hdev);
6552
6553 /* Suspend monitor filters */
6554 hci_suspend_monitor_sync(hdev);
6555
6556 /* Prevent disconnects from causing scanning to be re-enabled */
6557 hci_pause_scan_sync(hdev);
6558
6559 if (hci_conn_count(hdev)) {
6560 /* Soft disconnect everything (power off) */
6561 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
6562 if (err) {
6563 /* Set state to BT_RUNNING so resume doesn't notify */
6564 hdev->suspend_state = BT_RUNNING;
6565 hci_resume_sync(hdev);
6566 return err;
6567 }
6568
6569 /* Update event mask so only the allowed event can wakeup the
6570 * host.
6571 */
6572 hci_set_event_mask_sync(hdev);
6573 }
6574
6575 /* Only configure accept list if disconnect succeeded and wake
6576 * isn't being prevented.
6577 */
6578 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
6579 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
6580 return 0;
6581 }
6582
6583 /* Unpause to take care of updating scanning params */
6584 hdev->scanning_paused = false;
6585
6586 /* Enable event filter for paired devices */
6587 hci_update_event_filter_sync(hdev);
6588
6589 /* Update LE passive scan if enabled */
6590 hci_update_passive_scan_sync(hdev);
6591
6592 /* Pause scan changes again. */
6593 hdev->scanning_paused = true;
6594
6595 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
6596
6597 return 0;
6598}
6599
6600/* This function resumes discovery */
6601static int hci_resume_discovery_sync(struct hci_dev *hdev)
6602{
6603 int err;
6604
6605 /* If discovery not paused there nothing to do */
6606 if (!hdev->discovery_paused)
6607 return 0;
6608
6609 hdev->discovery_paused = false;
6610
6611 hci_discovery_set_state(hdev, DISCOVERY_STARTING);
6612
6613 err = hci_start_discovery_sync(hdev);
6614
6615 hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
6616 DISCOVERY_FINDING);
6617
6618 return err;
6619}
6620
6621static void hci_resume_monitor_sync(struct hci_dev *hdev)
6622{
6623 switch (hci_get_adv_monitor_offload_ext(hdev)) {
6624 case HCI_ADV_MONITOR_EXT_MSFT:
6625 msft_resume_sync(hdev);
6626 break;
6627 default:
6628 return;
6629 }
6630}
6631
6632/* This function resume scan and reset paused flag */
6633static int hci_resume_scan_sync(struct hci_dev *hdev)
6634{
6635 if (!hdev->scanning_paused)
6636 return 0;
6637
6638 hdev->scanning_paused = false;
6639
6640 hci_update_scan_sync(hdev);
6641
6642 /* Reset passive scanning to normal */
6643 hci_update_passive_scan_sync(hdev);
6644
6645 return 0;
6646}
6647
6648/* This function performs the HCI suspend procedures in the follow order:
6649 *
6650 * Restore event mask
6651 * Clear event filter
6652 * Update passive scanning (normal duty cycle)
6653 * Resume Directed Advertising/Advertising
6654 * Resume discovery (active scanning/inquiry)
6655 */
6656int hci_resume_sync(struct hci_dev *hdev)
6657{
6658 /* If not marked as suspended there nothing to do */
6659 if (!hdev->suspended)
6660 return 0;
6661
6662 hdev->suspended = false;
6663
6664 /* Restore event mask */
6665 hci_set_event_mask_sync(hdev);
6666
6667 /* Clear any event filters and restore scan state */
6668 hci_clear_event_filter_sync(hdev);
6669
6670 /* Resume scanning */
6671 hci_resume_scan_sync(hdev);
6672
6673 /* Resume monitor filters */
6674 hci_resume_monitor_sync(hdev);
6675
6676 /* Resume other advertisements */
6677 hci_resume_advertising_sync(hdev);
6678
6679 /* Resume discovery */
6680 hci_resume_discovery_sync(hdev);
6681
6682 return 0;
6683}
6684
6685static bool conn_use_rpa(struct hci_conn *conn)
6686{
6687 struct hci_dev *hdev = conn->hdev;
6688
6689 return hci_dev_test_flag(hdev, HCI_PRIVACY);
6690}
6691
6692static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
6693 struct hci_conn *conn)
6694{
6695 struct hci_cp_le_set_ext_adv_params cp;
6696 struct hci_rp_le_set_ext_adv_params rp;
6697 int err;
6698 bdaddr_t random_addr;
6699 u8 own_addr_type;
6700
6701 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6702 &own_addr_type);
6703 if (err)
6704 return err;
6705
6706 /* Set require_privacy to false so that the remote device has a
6707 * chance of identifying us.
6708 */
6709 err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
6710 &own_addr_type, &random_addr);
6711 if (err)
6712 return err;
6713
6714 memset(&cp, 0, sizeof(cp));
6715
6716 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
6717 cp.channel_map = hdev->le_adv_channel_map;
6718 cp.tx_power = HCI_TX_POWER_INVALID;
6719 cp.primary_phy = HCI_ADV_PHY_1M;
6720 cp.secondary_phy = HCI_ADV_PHY_1M;
6721 cp.handle = 0x00; /* Use instance 0 for directed adv */
6722 cp.own_addr_type = own_addr_type;
6723 cp.peer_addr_type = conn->dst_type;
6724 bacpy(&cp.peer_addr, &conn->dst);
6725
6726 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
6727 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
6728 * does not supports advertising data when the advertising set already
6729 * contains some, the controller shall return erroc code 'Invalid
6730 * HCI Command Parameters(0x12).
6731 * So it is required to remove adv set for handle 0x00. since we use
6732 * instance 0 for directed adv.
6733 */
6734 err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
6735 if (err)
6736 return err;
6737
6738 err = hci_set_ext_adv_params_sync(hdev, 0, &cp, &rp);
6739 if (err)
6740 return err;
6741
6742 /* Update adv data as tx power is known now */
6743 err = hci_set_ext_adv_data_sync(hdev, cp.handle);
6744 if (err)
6745 return err;
6746
6747 /* Check if random address need to be updated */
6748 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
6749 bacmp(&random_addr, BDADDR_ANY) &&
6750 bacmp(&random_addr, &hdev->random_addr)) {
6751 err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
6752 &random_addr);
6753 if (err)
6754 return err;
6755 }
6756
6757 return hci_enable_ext_advertising_sync(hdev, 0x00);
6758}
6759
6760static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
6761 struct hci_conn *conn)
6762{
6763 struct hci_cp_le_set_adv_param cp;
6764 u8 status;
6765 u8 own_addr_type;
6766 u8 enable;
6767
6768 if (ext_adv_capable(hdev))
6769 return hci_le_ext_directed_advertising_sync(hdev, conn);
6770
6771 /* Clear the HCI_LE_ADV bit temporarily so that the
6772 * hci_update_random_address knows that it's safe to go ahead
6773 * and write a new random address. The flag will be set back on
6774 * as soon as the SET_ADV_ENABLE HCI command completes.
6775 */
6776 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6777
6778 /* Set require_privacy to false so that the remote device has a
6779 * chance of identifying us.
6780 */
6781 status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6782 &own_addr_type);
6783 if (status)
6784 return status;
6785
6786 memset(&cp, 0, sizeof(cp));
6787
6788 /* Some controllers might reject command if intervals are not
6789 * within range for undirected advertising.
6790 * BCM20702A0 is known to be affected by this.
6791 */
6792 cp.min_interval = cpu_to_le16(0x0020);
6793 cp.max_interval = cpu_to_le16(0x0020);
6794
6795 cp.type = LE_ADV_DIRECT_IND;
6796 cp.own_address_type = own_addr_type;
6797 cp.direct_addr_type = conn->dst_type;
6798 bacpy(&cp.direct_addr, &conn->dst);
6799 cp.channel_map = hdev->le_adv_channel_map;
6800
6801 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
6802 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6803 if (status)
6804 return status;
6805
6806 enable = 0x01;
6807
6808 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
6809 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
6810}
6811
6812static void set_ext_conn_params(struct hci_conn *conn,
6813 struct hci_cp_le_ext_conn_param *p)
6814{
6815 struct hci_dev *hdev = conn->hdev;
6816
6817 memset(p, 0, sizeof(*p));
6818
6819 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6820 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6821 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6822 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6823 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
6824 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6825 p->min_ce_len = cpu_to_le16(0x0000);
6826 p->max_ce_len = cpu_to_le16(0x0000);
6827}
6828
6829static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
6830 struct hci_conn *conn, u8 own_addr_type)
6831{
6832 struct hci_cp_le_ext_create_conn *cp;
6833 struct hci_cp_le_ext_conn_param *p;
6834 u8 data[sizeof(*cp) + sizeof(*p) * 3];
6835 u32 plen;
6836
6837 cp = (void *)data;
6838 p = (void *)cp->data;
6839
6840 memset(cp, 0, sizeof(*cp));
6841
6842 bacpy(&cp->peer_addr, &conn->dst);
6843 cp->peer_addr_type = conn->dst_type;
6844 cp->own_addr_type = own_addr_type;
6845
6846 plen = sizeof(*cp);
6847
6848 if (scan_1m(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_1M ||
6849 conn->le_adv_sec_phy == HCI_ADV_PHY_1M)) {
6850 cp->phys |= LE_SCAN_PHY_1M;
6851 set_ext_conn_params(conn, p);
6852
6853 p++;
6854 plen += sizeof(*p);
6855 }
6856
6857 if (scan_2m(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_2M ||
6858 conn->le_adv_sec_phy == HCI_ADV_PHY_2M)) {
6859 cp->phys |= LE_SCAN_PHY_2M;
6860 set_ext_conn_params(conn, p);
6861
6862 p++;
6863 plen += sizeof(*p);
6864 }
6865
6866 if (scan_coded(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_CODED ||
6867 conn->le_adv_sec_phy == HCI_ADV_PHY_CODED)) {
6868 cp->phys |= LE_SCAN_PHY_CODED;
6869 set_ext_conn_params(conn, p);
6870
6871 plen += sizeof(*p);
6872 }
6873
6874 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
6875 plen, data,
6876 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
6877 conn->conn_timeout, NULL);
6878}
6879
6880static int hci_le_create_conn_sync(struct hci_dev *hdev, void *data)
6881{
6882 struct hci_cp_le_create_conn cp;
6883 struct hci_conn_params *params;
6884 u8 own_addr_type;
6885 int err;
6886 struct hci_conn *conn = data;
6887
6888 if (!hci_conn_valid(hdev, conn))
6889 return -ECANCELED;
6890
6891 bt_dev_dbg(hdev, "conn %p", conn);
6892
6893 clear_bit(HCI_CONN_SCANNING, &conn->flags);
6894 conn->state = BT_CONNECT;
6895
6896 /* If requested to connect as peripheral use directed advertising */
6897 if (conn->role == HCI_ROLE_SLAVE) {
6898 /* If we're active scanning and simultaneous roles is not
6899 * enabled simply reject the attempt.
6900 */
6901 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
6902 hdev->le_scan_type == LE_SCAN_ACTIVE &&
6903 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
6904 conn->state = BT_OPEN;
6905 hci_abort_conn_sync(hdev, conn,
6906 HCI_ERROR_REJ_LIMITED_RESOURCES);
6907 return -EBUSY;
6908 }
6909
6910 /* Pause advertising while doing directed advertising. */
6911 hci_pause_advertising_sync(hdev);
6912
6913 err = hci_le_directed_advertising_sync(hdev, conn);
6914 goto done;
6915 }
6916
6917 /* Disable advertising if simultaneous roles is not in use. */
6918 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
6919 hci_pause_advertising_sync(hdev);
6920
6921 hci_dev_lock(hdev);
6922
6923 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
6924 if (params) {
6925 conn->le_conn_min_interval = params->conn_min_interval;
6926 conn->le_conn_max_interval = params->conn_max_interval;
6927 conn->le_conn_latency = params->conn_latency;
6928 conn->le_supv_timeout = params->supervision_timeout;
6929 } else {
6930 conn->le_conn_min_interval = hdev->le_conn_min_interval;
6931 conn->le_conn_max_interval = hdev->le_conn_max_interval;
6932 conn->le_conn_latency = hdev->le_conn_latency;
6933 conn->le_supv_timeout = hdev->le_supv_timeout;
6934 }
6935
6936 hci_dev_unlock(hdev);
6937
6938 /* If controller is scanning, we stop it since some controllers are
6939 * not able to scan and connect at the same time. Also set the
6940 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
6941 * handler for scan disabling knows to set the correct discovery
6942 * state.
6943 */
6944 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
6945 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
6946 hci_scan_disable_sync(hdev);
6947 }
6948
6949 /* Update random address, but set require_privacy to false so
6950 * that we never connect with an non-resolvable address.
6951 */
6952 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6953 &own_addr_type);
6954 if (err)
6955 goto done;
6956
6957 /* Mark create connection in flight so hci_cancel_connect_sync() can
6958 * cancel it while blocking on the connection complete event.
6959 */
6960 set_bit(HCI_CONN_CREATE, &conn->flags);
6961
6962 /* Send command LE Extended Create Connection if supported */
6963 if (use_ext_conn(hdev)) {
6964 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
6965 goto done;
6966 }
6967
6968 memset(&cp, 0, sizeof(cp));
6969
6970 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6971 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6972
6973 bacpy(&cp.peer_addr, &conn->dst);
6974 cp.peer_addr_type = conn->dst_type;
6975 cp.own_address_type = own_addr_type;
6976 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6977 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6978 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
6979 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6980 cp.min_ce_len = cpu_to_le16(0x0000);
6981 cp.max_ce_len = cpu_to_le16(0x0000);
6982
6983 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
6984 *
6985 * If this event is unmasked and the HCI_LE_Connection_Complete event
6986 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
6987 * sent when a new connection has been created.
6988 */
6989 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
6990 sizeof(cp), &cp,
6991 use_enhanced_conn_complete(hdev) ?
6992 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
6993 HCI_EV_LE_CONN_COMPLETE,
6994 conn->conn_timeout, NULL);
6995
6996done:
6997 clear_bit(HCI_CONN_CREATE, &conn->flags);
6998
6999 if (err == -ETIMEDOUT)
7000 hci_le_connect_cancel_sync(hdev, conn, 0x00);
7001
7002 /* Re-enable advertising after the connection attempt is finished. */
7003 hci_resume_advertising_sync(hdev);
7004 return err;
7005}
7006
7007int hci_le_create_cis_sync(struct hci_dev *hdev)
7008{
7009 DEFINE_FLEX(struct hci_cp_le_create_cis, cmd, cis, num_cis, 0x1f);
7010 size_t aux_num_cis = 0;
7011 struct hci_conn *conn;
7012 u16 timeout = 0;
7013 u8 cig = BT_ISO_QOS_CIG_UNSET;
7014
7015 /* The spec allows only one pending LE Create CIS command at a time. If
7016 * the command is pending now, don't do anything. We check for pending
7017 * connections after each CIS Established event.
7018 *
7019 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
7020 * page 2566:
7021 *
7022 * If the Host issues this command before all the
7023 * HCI_LE_CIS_Established events from the previous use of the
7024 * command have been generated, the Controller shall return the
7025 * error code Command Disallowed (0x0C).
7026 *
7027 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
7028 * page 2567:
7029 *
7030 * When the Controller receives the HCI_LE_Create_CIS command, the
7031 * Controller sends the HCI_Command_Status event to the Host. An
7032 * HCI_LE_CIS_Established event will be generated for each CIS when it
7033 * is established or if it is disconnected or considered lost before
7034 * being established; until all the events are generated, the command
7035 * remains pending.
7036 */
7037
7038 hci_dev_lock(hdev);
7039
7040 rcu_read_lock();
7041
7042 /* Wait until previous Create CIS has completed */
7043 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
7044 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
7045 goto done;
7046 }
7047
7048 /* Find CIG with all CIS ready */
7049 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
7050 struct hci_conn *link;
7051
7052 if (hci_conn_check_create_cis(conn))
7053 continue;
7054
7055 cig = conn->iso_qos.ucast.cig;
7056
7057 list_for_each_entry_rcu(link, &hdev->conn_hash.list, list) {
7058 if (hci_conn_check_create_cis(link) > 0 &&
7059 link->iso_qos.ucast.cig == cig &&
7060 link->state != BT_CONNECTED) {
7061 cig = BT_ISO_QOS_CIG_UNSET;
7062 break;
7063 }
7064 }
7065
7066 if (cig != BT_ISO_QOS_CIG_UNSET)
7067 break;
7068 }
7069
7070 if (cig == BT_ISO_QOS_CIG_UNSET)
7071 goto done;
7072
7073 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
7074 struct hci_cis *cis = &cmd->cis[aux_num_cis];
7075
7076 if (hci_conn_check_create_cis(conn) ||
7077 conn->iso_qos.ucast.cig != cig)
7078 continue;
7079
7080 set_bit(HCI_CONN_CREATE_CIS, &conn->flags);
7081 cis->acl_handle = cpu_to_le16(conn->parent->handle);
7082 cis->cis_handle = cpu_to_le16(conn->handle);
7083 timeout = conn->conn_timeout;
7084 aux_num_cis++;
7085
7086 if (aux_num_cis >= cmd->num_cis)
7087 break;
7088 }
7089 cmd->num_cis = aux_num_cis;
7090
7091done:
7092 rcu_read_unlock();
7093
7094 hci_dev_unlock(hdev);
7095
7096 if (!aux_num_cis)
7097 return 0;
7098
7099 /* Wait for HCI_LE_CIS_Established */
7100 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CIS,
7101 struct_size(cmd, cis, cmd->num_cis),
7102 cmd, HCI_EVT_LE_CIS_ESTABLISHED,
7103 timeout, NULL);
7104}
7105
7106int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle)
7107{
7108 struct hci_cp_le_remove_cig cp;
7109
7110 memset(&cp, 0, sizeof(cp));
7111 cp.cig_id = handle;
7112
7113 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp),
7114 &cp, HCI_CMD_TIMEOUT);
7115}
7116
7117int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle)
7118{
7119 struct hci_cp_le_big_term_sync cp;
7120
7121 memset(&cp, 0, sizeof(cp));
7122 cp.handle = handle;
7123
7124 return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC,
7125 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
7126}
7127
7128int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
7129{
7130 struct hci_cp_le_pa_term_sync cp;
7131
7132 memset(&cp, 0, sizeof(cp));
7133 cp.handle = cpu_to_le16(handle);
7134
7135 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
7136 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
7137}
7138
7139int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
7140 bool use_rpa, struct adv_info *adv_instance,
7141 u8 *own_addr_type, bdaddr_t *rand_addr)
7142{
7143 int err;
7144
7145 bacpy(rand_addr, BDADDR_ANY);
7146
7147 /* If privacy is enabled use a resolvable private address. If
7148 * current RPA has expired then generate a new one.
7149 */
7150 if (use_rpa) {
7151 /* If Controller supports LL Privacy use own address type is
7152 * 0x03
7153 */
7154 if (ll_privacy_capable(hdev))
7155 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
7156 else
7157 *own_addr_type = ADDR_LE_DEV_RANDOM;
7158
7159 if (adv_instance) {
7160 if (adv_rpa_valid(adv_instance))
7161 return 0;
7162 } else {
7163 if (rpa_valid(hdev))
7164 return 0;
7165 }
7166
7167 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
7168 if (err < 0) {
7169 bt_dev_err(hdev, "failed to generate new RPA");
7170 return err;
7171 }
7172
7173 bacpy(rand_addr, &hdev->rpa);
7174
7175 return 0;
7176 }
7177
7178 /* In case of required privacy without resolvable private address,
7179 * use an non-resolvable private address. This is useful for
7180 * non-connectable advertising.
7181 */
7182 if (require_privacy) {
7183 bdaddr_t nrpa;
7184
7185 while (true) {
7186 /* The non-resolvable private address is generated
7187 * from random six bytes with the two most significant
7188 * bits cleared.
7189 */
7190 get_random_bytes(&nrpa, 6);
7191 nrpa.b[5] &= 0x3f;
7192
7193 /* The non-resolvable private address shall not be
7194 * equal to the public address.
7195 */
7196 if (bacmp(&hdev->bdaddr, &nrpa))
7197 break;
7198 }
7199
7200 *own_addr_type = ADDR_LE_DEV_RANDOM;
7201 bacpy(rand_addr, &nrpa);
7202
7203 return 0;
7204 }
7205
7206 /* No privacy, use the current address */
7207 hci_copy_identity_address(hdev, rand_addr, own_addr_type);
7208
7209 return 0;
7210}
7211
7212static int _update_adv_data_sync(struct hci_dev *hdev, void *data)
7213{
7214 u8 instance = PTR_UINT(data);
7215
7216 return hci_update_adv_data_sync(hdev, instance);
7217}
7218
7219int hci_update_adv_data(struct hci_dev *hdev, u8 instance)
7220{
7221 return hci_cmd_sync_queue(hdev, _update_adv_data_sync,
7222 UINT_PTR(instance), NULL);
7223}
7224
7225static int hci_acl_create_conn_sync(struct hci_dev *hdev, void *data)
7226{
7227 struct hci_conn *conn = data;
7228 struct inquiry_entry *ie;
7229 struct hci_cp_create_conn cp;
7230 int err;
7231
7232 if (!hci_conn_valid(hdev, conn))
7233 return -ECANCELED;
7234
7235 /* Many controllers disallow HCI Create Connection while it is doing
7236 * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
7237 * Connection. This may cause the MGMT discovering state to become false
7238 * without user space's request but it is okay since the MGMT Discovery
7239 * APIs do not promise that discovery should be done forever. Instead,
7240 * the user space monitors the status of MGMT discovering and it may
7241 * request for discovery again when this flag becomes false.
7242 */
7243 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
7244 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL, 0,
7245 NULL, HCI_CMD_TIMEOUT);
7246 if (err)
7247 bt_dev_warn(hdev, "Failed to cancel inquiry %d", err);
7248 }
7249
7250 conn->state = BT_CONNECT;
7251 conn->out = true;
7252 conn->role = HCI_ROLE_MASTER;
7253
7254 conn->attempt++;
7255
7256 memset(&cp, 0, sizeof(cp));
7257 bacpy(&cp.bdaddr, &conn->dst);
7258 cp.pscan_rep_mode = 0x02;
7259
7260 hci_dev_lock(hdev);
7261 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
7262 if (ie) {
7263 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
7264 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
7265 cp.pscan_mode = ie->data.pscan_mode;
7266 cp.clock_offset = ie->data.clock_offset |
7267 cpu_to_le16(0x8000);
7268 }
7269
7270 memcpy(conn->dev_class, ie->data.dev_class, 3);
7271 }
7272 hci_dev_unlock(hdev);
7273
7274 cp.pkt_type = cpu_to_le16(conn->pkt_type);
7275 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
7276 cp.role_switch = 0x01;
7277 else
7278 cp.role_switch = 0x00;
7279
7280 /* Mark create connection in flight so hci_cancel_connect_sync() can
7281 * cancel it while blocking on the connection complete event.
7282 */
7283 set_bit(HCI_CONN_CREATE, &conn->flags);
7284
7285 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN,
7286 sizeof(cp), &cp,
7287 HCI_EV_CONN_COMPLETE,
7288 conn->conn_timeout, NULL);
7289
7290 clear_bit(HCI_CONN_CREATE, &conn->flags);
7291
7292 return err;
7293}
7294
7295static void hci_acl_create_conn_sync_complete(struct hci_dev *hdev, void *data,
7296 int err)
7297{
7298 struct hci_conn *conn = data;
7299
7300 hci_conn_put(conn);
7301}
7302
7303int hci_connect_acl_sync(struct hci_dev *hdev, struct hci_conn *conn)
7304{
7305 int err;
7306
7307 err = hci_cmd_sync_queue_once(hdev, hci_acl_create_conn_sync,
7308 hci_conn_get(conn),
7309 hci_acl_create_conn_sync_complete);
7310 if (err)
7311 hci_conn_put(conn);
7312 return (err == -EEXIST) ? 0 : err;
7313}
7314
7315static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
7316{
7317 struct hci_conn *conn = data;
7318
7319 bt_dev_dbg(hdev, "err %d", err);
7320
7321 if (err == -ECANCELED)
7322 goto done;
7323
7324 hci_dev_lock(hdev);
7325
7326 if (!hci_conn_valid(hdev, conn))
7327 goto unlock;
7328
7329 if (!err) {
7330 hci_connect_le_scan_cleanup(conn, 0x00);
7331 goto unlock;
7332 }
7333
7334 /* Check if this connection is still pending.
7335 *
7336 * hci_lookup_le_connect() returns only the first LE connection
7337 * in BT_CONNECT, which is not necessarily this one when two are
7338 * pending at once, so ask the connection itself.
7339 */
7340 if (conn->state != BT_CONNECT)
7341 goto unlock;
7342
7343 /* Flush to make sure we send create conn cancel command if needed */
7344 flush_delayed_work(&conn->le_conn_timeout);
7345 hci_conn_failed(conn, bt_status(err));
7346
7347unlock:
7348 hci_dev_unlock(hdev);
7349done:
7350 hci_conn_put(conn);
7351}
7352
7353int hci_connect_le_sync(struct hci_dev *hdev, struct hci_conn *conn)
7354{
7355 int err;
7356
7357 err = hci_cmd_sync_queue_once(hdev, hci_le_create_conn_sync,
7358 hci_conn_get(conn),
7359 create_le_conn_complete);
7360 if (err)
7361 hci_conn_put(conn);
7362 return (err == -EEXIST) ? 0 : err;
7363}
7364
7365static int hci_acl_cancel_create_conn_sync(struct hci_dev *hdev,
7366 struct hci_conn *conn)
7367{
7368 struct hci_cmd_sync_work_entry *entry;
7369 int err = -EBUSY;
7370
7371 /* cmd_sync_work_lock makes the HCI_CONN_CREATE test and the cancel
7372 * atomic against the worker, which takes this lock to dequeue every
7373 * entry: while it is held no other command can become pending, so
7374 * hci_cmd_sync_cancel() cannot cancel an unrelated command.
7375 */
7376 mutex_lock(&hdev->cmd_sync_work_lock);
7377
7378 /* In flight: this connection owns the pending request, cancel it. */
7379 if (test_bit(HCI_CONN_CREATE, &conn->flags)) {
7380 hci_cmd_sync_cancel(hdev, ECANCELED);
7381 goto unlock;
7382 }
7383
7384 /* Still queued: a successful dequeue means it never started, so there
7385 * is nothing to disconnect.
7386 */
7387 entry = _hci_cmd_sync_lookup_entry(hdev, hci_acl_create_conn_sync, conn,
7388 NULL);
7389 if (entry) {
7390 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
7391 err = 0;
7392 }
7393
7394unlock:
7395 mutex_unlock(&hdev->cmd_sync_work_lock);
7396 return err;
7397}
7398
7399static int hci_le_cancel_create_conn_sync(struct hci_dev *hdev,
7400 struct hci_conn *conn)
7401{
7402 struct hci_cmd_sync_work_entry *entry;
7403 int err = -EBUSY;
7404
7405 /* cmd_sync_work_lock keeps the HCI_CONN_CREATE test and the cancel
7406 * atomic against the cmd_sync worker.
7407 */
7408 mutex_lock(&hdev->cmd_sync_work_lock);
7409
7410 if (test_bit(HCI_CONN_CREATE, &conn->flags)) {
7411 hci_cmd_sync_cancel(hdev, ECANCELED);
7412 goto unlock;
7413 }
7414
7415 entry = _hci_cmd_sync_lookup_entry(hdev, hci_le_create_conn_sync, conn,
7416 create_le_conn_complete);
7417 if (entry) {
7418 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
7419 err = 0;
7420 }
7421
7422unlock:
7423 mutex_unlock(&hdev->cmd_sync_work_lock);
7424 return err;
7425}
7426
7427static int hci_cis_cancel_create_conn_sync(struct hci_dev *hdev,
7428 struct hci_conn *conn)
7429{
7430 /* LE Create CIS is shared by the whole CIG and cannot be dequeued
7431 * per-connection, so only an in-flight command can be cancelled.
7432 * cmd_sync_work_lock keeps the test and the cancel atomic against the
7433 * cmd_sync worker.
7434 */
7435 mutex_lock(&hdev->cmd_sync_work_lock);
7436
7437 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
7438 hci_cmd_sync_cancel(hdev, ECANCELED);
7439
7440 mutex_unlock(&hdev->cmd_sync_work_lock);
7441 return -EBUSY;
7442}
7443
7444int hci_cancel_connect_sync(struct hci_dev *hdev, struct hci_conn *conn)
7445{
7446 switch (conn->type) {
7447 case ACL_LINK:
7448 return hci_acl_cancel_create_conn_sync(hdev, conn);
7449 case LE_LINK:
7450 return hci_le_cancel_create_conn_sync(hdev, conn);
7451 case CIS_LINK:
7452 return hci_cis_cancel_create_conn_sync(hdev, conn);
7453 default:
7454 return -ENOENT;
7455 }
7456}
7457
7458int hci_le_conn_update_sync(struct hci_dev *hdev, struct hci_conn *conn,
7459 struct hci_conn_params *params)
7460{
7461 struct hci_cp_le_conn_update cp;
7462
7463 memset(&cp, 0, sizeof(cp));
7464 cp.handle = cpu_to_le16(conn->handle);
7465 cp.conn_interval_min = cpu_to_le16(params->conn_min_interval);
7466 cp.conn_interval_max = cpu_to_le16(params->conn_max_interval);
7467 cp.conn_latency = cpu_to_le16(params->conn_latency);
7468 cp.supervision_timeout = cpu_to_le16(params->supervision_timeout);
7469 cp.min_ce_len = cpu_to_le16(0x0000);
7470 cp.max_ce_len = cpu_to_le16(0x0000);
7471
7472 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CONN_UPDATE,
7473 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
7474}
7475
7476static int hci_le_conn_rate_request_sync(struct hci_dev *hdev, void *data)
7477{
7478 struct hci_conn *conn = data;
7479 struct hci_conn_params *params;
7480 struct hci_cp_le_conn_rate cp;
7481
7482 hci_dev_lock(hdev);
7483
7484 /* The request was queued asynchronously so re-validate the connection
7485 * and its parameters under hdev->lock. The connection may have been
7486 * torn down, or may not have a valid handle yet (still connecting),
7487 * and the parameters may have been removed in the meantime (e.g. by
7488 * Load Connection Parameters). Snapshot the rate values so the
7489 * blocking command below can run without holding hdev->lock.
7490 */
7491 if (!hci_conn_valid(hdev, conn) ||
7492 HCI_CONN_HANDLE_UNSET(conn->handle)) {
7493 hci_dev_unlock(hdev);
7494 return -ECANCELED;
7495 }
7496
7497 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
7498 if (!params) {
7499 hci_dev_unlock(hdev);
7500 return -ECANCELED;
7501 }
7502
7503 memset(&cp, 0, sizeof(cp));
7504 cp.handle = cpu_to_le16(conn->handle);
7505 cp.interval_min = cpu_to_le16(params->rate_min_interval);
7506 cp.interval_max = cpu_to_le16(params->rate_max_interval);
7507 cp.subrate_min = cpu_to_le16(params->subrate_min);
7508 cp.subrate_max = cpu_to_le16(params->subrate_max);
7509 cp.max_latency = cpu_to_le16(params->max_latency);
7510 cp.cont_num = cpu_to_le16(params->cont_num);
7511 cp.supv_timeout = cpu_to_le16(params->rate_supv_timeout);
7512
7513 /* The connection event length recommended in requests by a Peripheral
7514 * uses units of 125 us with a valid range of 0x0001 to 0x7CFF
7515 * (0.125 ms to 3.999875 s), so 0x0000 cannot be used. Also note that
7516 * the Controller is not required to use these values:
7517 *
7518 * BLUETOOTH CORE SPECIFICATION Version 6.2 | Vol 4, Part E
7519 * 7.8.157. LE Connection Rate Request command
7520 *
7521 * The Min_CE_Length and Max_CE_Length parameters provide the
7522 * Controller with the expected minimum and maximum length of the
7523 * connection events. The Controller is not required to use these
7524 * values.
7525 *
7526 * So it is safe to just use the minimum.
7527 */
7528 cp.min_ce_len = cpu_to_le16(0x0001);
7529 cp.max_ce_len = cpu_to_le16(0x0001);
7530
7531 hci_dev_unlock(hdev);
7532
7533 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CONN_RATE,
7534 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
7535}
7536
7537static void hci_le_conn_rate_request_destroy(struct hci_dev *hdev, void *data,
7538 int err)
7539{
7540 struct hci_conn *conn = data;
7541
7542 hci_conn_put(conn);
7543}
7544
7545int hci_le_conn_rate_request(struct hci_dev *hdev, struct hci_conn *conn)
7546{
7547 int err;
7548
7549 /* Hold a reference to the connection so it cannot be freed while the
7550 * request is pending or running on the cmd_sync worker.
7551 */
7552 err = hci_cmd_sync_queue(hdev, hci_le_conn_rate_request_sync,
7553 hci_conn_get(conn),
7554 hci_le_conn_rate_request_destroy);
7555 if (err < 0)
7556 hci_conn_put(conn);
7557
7558 return err;
7559}
7560
7561static void create_pa_complete(struct hci_dev *hdev, void *data, int err)
7562{
7563 struct hci_conn *conn = data;
7564 struct hci_conn *pa_sync;
7565
7566 bt_dev_dbg(hdev, "err %d", err);
7567
7568 if (err == -ECANCELED)
7569 goto done;
7570
7571 hci_dev_lock(hdev);
7572
7573 if (hci_conn_valid(hdev, conn))
7574 clear_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags);
7575
7576 if (!err)
7577 goto unlock;
7578
7579 /* Add connection to indicate PA sync error */
7580 pa_sync = hci_conn_add_unset(hdev, PA_LINK, BDADDR_ANY, 0,
7581 HCI_ROLE_SLAVE);
7582
7583 if (IS_ERR(pa_sync))
7584 goto unlock;
7585
7586 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
7587
7588 /* Notify iso layer */
7589 hci_connect_cfm(pa_sync, bt_status(err));
7590
7591unlock:
7592 hci_dev_unlock(hdev);
7593done:
7594 hci_conn_put(conn);
7595}
7596
7597static int hci_le_past_params_sync(struct hci_dev *hdev, struct hci_conn *conn,
7598 u16 acl_handle, struct bt_iso_qos *qos)
7599{
7600 struct hci_cp_le_past_params cp;
7601 int err;
7602
7603 memset(&cp, 0, sizeof(cp));
7604 cp.handle = cpu_to_le16(acl_handle);
7605 /* An HCI_LE_Periodic_Advertising_Sync_Transfer_Received event is sent
7606 * to the Host. HCI_LE_Periodic_Advertising_Report events will be
7607 * enabled with duplicate filtering enabled.
7608 */
7609 cp.mode = 0x03;
7610 cp.skip = cpu_to_le16(qos->bcast.skip);
7611 cp.sync_timeout = cpu_to_le16(qos->bcast.sync_timeout);
7612 cp.cte_type = qos->bcast.sync_cte_type;
7613
7614 /* HCI_LE_PAST_PARAMS command returns a command complete event so it
7615 * cannot wait for HCI_EV_LE_PAST_RECEIVED.
7616 */
7617 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_PAST_PARAMS,
7618 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
7619 if (err)
7620 return err;
7621
7622 /* Wait for HCI_EV_LE_PAST_RECEIVED event */
7623 return __hci_cmd_sync_status_sk(hdev, HCI_OP_NOP, 0, NULL,
7624 HCI_EV_LE_PAST_RECEIVED,
7625 conn->conn_timeout, NULL);
7626}
7627
7628static int hci_le_pa_create_sync(struct hci_dev *hdev, void *data)
7629{
7630 struct hci_cp_le_pa_create_sync cp;
7631 struct hci_conn *conn = data, *le;
7632 struct bt_iso_qos *qos = &conn->iso_qos;
7633 int err;
7634
7635 if (!hci_conn_valid(hdev, conn))
7636 return -ECANCELED;
7637
7638 if (conn->sync_handle != HCI_SYNC_HANDLE_INVALID)
7639 return -EINVAL;
7640
7641 if (hci_dev_test_and_set_flag(hdev, HCI_PA_SYNC))
7642 return -EBUSY;
7643
7644 /* Stop scanning if SID has not been set and active scanning is enabled
7645 * so we use passive scanning which will be scanning using the allow
7646 * list programmed to contain only the connection address.
7647 */
7648 if (conn->sid == HCI_SID_INVALID &&
7649 hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
7650 hci_scan_disable_sync(hdev);
7651 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
7652 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
7653 }
7654
7655 /* Mark HCI_CONN_CREATE_PA_SYNC so hci_update_passive_scan_sync can
7656 * program the address in the allow list so PA advertisements can be
7657 * received.
7658 */
7659 set_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags);
7660
7661 hci_update_passive_scan_sync(hdev);
7662
7663 /* Check if PAST is possible:
7664 *
7665 * 1. Check if an ACL connection with the destination address exists
7666 * 2. Check if that HCI_CONN_FLAG_PAST has been set which indicates that
7667 * user really intended to use PAST.
7668 */
7669 hci_dev_lock(hdev);
7670
7671 le = hci_conn_hash_lookup_le(hdev, &conn->dst, conn->dst_type);
7672 if (le) {
7673 struct hci_conn_params *params;
7674 hci_conn_flags_t flags = 0;
7675 u16 le_handle = le->handle;
7676
7677 params = hci_conn_params_lookup(hdev, &le->dst, le->dst_type);
7678 if (params)
7679 flags = params->flags;
7680
7681 hci_dev_unlock(hdev);
7682
7683 if (flags & HCI_CONN_FLAG_PAST) {
7684 err = hci_le_past_params_sync(hdev, conn, le_handle,
7685 qos);
7686 if (!err)
7687 goto done;
7688 }
7689 } else {
7690 hci_dev_unlock(hdev);
7691 }
7692
7693 /* SID has not been set listen for HCI_EV_LE_EXT_ADV_REPORT to update
7694 * it.
7695 */
7696 if (conn->sid == HCI_SID_INVALID) {
7697 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_NOP, 0, NULL,
7698 HCI_EV_LE_EXT_ADV_REPORT,
7699 conn->conn_timeout, NULL);
7700 if (err == -ETIMEDOUT)
7701 goto done;
7702 }
7703
7704 memset(&cp, 0, sizeof(cp));
7705 cp.options = qos->bcast.options;
7706 cp.sid = conn->sid;
7707 cp.addr_type = conn->dst_type;
7708 bacpy(&cp.addr, &conn->dst);
7709 cp.skip = cpu_to_le16(qos->bcast.skip);
7710 cp.sync_timeout = cpu_to_le16(qos->bcast.sync_timeout);
7711 cp.sync_cte_type = qos->bcast.sync_cte_type;
7712
7713 /* The spec allows only one pending LE Periodic Advertising Create
7714 * Sync command at a time so we forcefully wait for PA Sync Established
7715 * event since cmd_work can only schedule one command at a time.
7716 *
7717 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
7718 * page 2493:
7719 *
7720 * If the Host issues this command when another HCI_LE_Periodic_
7721 * Advertising_Create_Sync command is pending, the Controller shall
7722 * return the error code Command Disallowed (0x0C).
7723 */
7724 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_PA_CREATE_SYNC,
7725 sizeof(cp), &cp,
7726 HCI_EV_LE_PA_SYNC_ESTABLISHED,
7727 conn->conn_timeout, NULL);
7728 if (err == -ETIMEDOUT)
7729 __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_CREATE_SYNC_CANCEL,
7730 0, NULL, HCI_CMD_TIMEOUT);
7731
7732done:
7733 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
7734
7735 /* Update passive scan since HCI_PA_SYNC flag has been cleared */
7736 hci_update_passive_scan_sync(hdev);
7737
7738 return err;
7739}
7740
7741int hci_connect_pa_sync(struct hci_dev *hdev, struct hci_conn *conn)
7742{
7743 int err;
7744
7745 err = hci_cmd_sync_queue_once(hdev, hci_le_pa_create_sync,
7746 hci_conn_get(conn),
7747 create_pa_complete);
7748 if (err)
7749 hci_conn_put(conn);
7750 return (err == -EEXIST) ? 0 : err;
7751}
7752
7753static void create_big_complete(struct hci_dev *hdev, void *data, int err)
7754{
7755 struct hci_conn *conn = data;
7756
7757 bt_dev_dbg(hdev, "err %d", err);
7758
7759 if (err == -ECANCELED)
7760 goto done;
7761
7762 clear_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags);
7763
7764done:
7765 hci_conn_put(conn);
7766}
7767
7768static int hci_le_big_create_sync(struct hci_dev *hdev, void *data)
7769{
7770 DEFINE_FLEX(struct hci_cp_le_big_create_sync, cp, bis, num_bis,
7771 HCI_MAX_ISO_BIS);
7772 struct hci_conn *conn = data;
7773 struct bt_iso_qos *qos = &conn->iso_qos;
7774 int err;
7775
7776 if (!hci_conn_valid(hdev, conn))
7777 return -ECANCELED;
7778
7779 set_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags);
7780
7781 memset(cp, 0, sizeof(*cp));
7782 cp->handle = qos->bcast.big;
7783 cp->sync_handle = cpu_to_le16(conn->sync_handle);
7784 cp->encryption = qos->bcast.encryption;
7785 memcpy(cp->bcode, qos->bcast.bcode, sizeof(cp->bcode));
7786 cp->mse = qos->bcast.mse;
7787 cp->timeout = cpu_to_le16(qos->bcast.timeout);
7788 cp->num_bis = conn->num_bis;
7789 memcpy(cp->bis, conn->bis, conn->num_bis);
7790
7791 /* The spec allows only one pending LE BIG Create Sync command at
7792 * a time, so we forcefully wait for BIG Sync Established event since
7793 * cmd_work can only schedule one command at a time.
7794 *
7795 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
7796 * page 2586:
7797 *
7798 * If the Host sends this command when the Controller is in the
7799 * process of synchronizing to any BIG, i.e. the HCI_LE_BIG_Sync_
7800 * Established event has not been generated, the Controller shall
7801 * return the error code Command Disallowed (0x0C).
7802 */
7803 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_BIG_CREATE_SYNC,
7804 struct_size(cp, bis, cp->num_bis), cp,
7805 HCI_EVT_LE_BIG_SYNC_ESTABLISHED,
7806 conn->conn_timeout, NULL);
7807 if (err == -ETIMEDOUT)
7808 hci_le_big_terminate_sync(hdev, cp->handle);
7809
7810 return err;
7811}
7812
7813int hci_connect_big_sync(struct hci_dev *hdev, struct hci_conn *conn)
7814{
7815 int err;
7816
7817 if (!conn)
7818 return 0;
7819
7820 err = hci_cmd_sync_queue_once(hdev, hci_le_big_create_sync,
7821 hci_conn_get(conn),
7822 create_big_complete);
7823 if (err)
7824 hci_conn_put(conn);
7825 return (err == -EEXIST) ? 0 : err;
7826}
7827
7828struct past_data {
7829 struct hci_conn *conn;
7830 struct hci_conn *le;
7831};
7832
7833static void past_complete(struct hci_dev *hdev, void *data, int err)
7834{
7835 struct past_data *past = data;
7836
7837 bt_dev_dbg(hdev, "err %d", err);
7838
7839 hci_conn_put(past->conn);
7840 hci_conn_put(past->le);
7841 kfree(past);
7842}
7843
7844static int hci_le_past_set_info_sync(struct hci_dev *hdev, void *data)
7845{
7846 struct past_data *past = data;
7847 struct hci_cp_le_past_set_info cp;
7848
7849 hci_dev_lock(hdev);
7850
7851 if (!hci_conn_valid(hdev, past->conn) ||
7852 !hci_conn_valid(hdev, past->le)) {
7853 hci_dev_unlock(hdev);
7854 return -ECANCELED;
7855 }
7856
7857 memset(&cp, 0, sizeof(cp));
7858 cp.handle = cpu_to_le16(past->le->handle);
7859 cp.adv_handle = past->conn->iso_qos.bcast.bis;
7860
7861 hci_dev_unlock(hdev);
7862
7863 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PAST_SET_INFO,
7864 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
7865}
7866
7867static int hci_le_past_sync(struct hci_dev *hdev, void *data)
7868{
7869 struct past_data *past = data;
7870 struct hci_cp_le_past cp;
7871
7872 hci_dev_lock(hdev);
7873
7874 if (!hci_conn_valid(hdev, past->conn) ||
7875 !hci_conn_valid(hdev, past->le)) {
7876 hci_dev_unlock(hdev);
7877 return -ECANCELED;
7878 }
7879
7880 memset(&cp, 0, sizeof(cp));
7881 cp.handle = cpu_to_le16(past->le->handle);
7882 cp.sync_handle = cpu_to_le16(past->conn->sync_handle);
7883
7884 hci_dev_unlock(hdev);
7885
7886 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PAST,
7887 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
7888}
7889
7890int hci_past_sync(struct hci_conn *conn, struct hci_conn *le)
7891{
7892 struct past_data *data;
7893 int err;
7894
7895 if (conn->type != BIS_LINK && conn->type != PA_LINK)
7896 return -EINVAL;
7897
7898 if (!past_sender_capable(conn->hdev))
7899 return -EOPNOTSUPP;
7900
7901 data = kmalloc_obj(*data);
7902 if (!data)
7903 return -ENOMEM;
7904
7905 data->conn = hci_conn_get(conn);
7906 data->le = hci_conn_get(le);
7907
7908 if (conn->role == HCI_ROLE_MASTER)
7909 err = hci_cmd_sync_queue_once(conn->hdev,
7910 hci_le_past_set_info_sync, data,
7911 past_complete);
7912 else
7913 err = hci_cmd_sync_queue_once(conn->hdev, hci_le_past_sync,
7914 data, past_complete);
7915
7916 if (err) {
7917 hci_conn_put(data->conn);
7918 hci_conn_put(data->le);
7919 kfree(data);
7920 }
7921
7922 return (err == -EEXIST) ? 0 : err;
7923}
7924
7925static void le_read_features_complete(struct hci_dev *hdev, void *data, int err)
7926{
7927 struct hci_conn *conn = data;
7928
7929 bt_dev_dbg(hdev, "err %d", err);
7930
7931 hci_conn_drop(conn);
7932 hci_conn_put(conn);
7933}
7934
7935static int hci_le_read_all_remote_features_sync(struct hci_dev *hdev,
7936 void *data)
7937{
7938 struct hci_conn *conn = data;
7939 struct hci_cp_le_read_all_remote_features cp;
7940
7941 memset(&cp, 0, sizeof(cp));
7942 cp.handle = cpu_to_le16(conn->handle);
7943 cp.pages = 10; /* Attempt to read all pages */
7944
7945 /* Wait for HCI_EVT_LE_ALL_REMOTE_FEATURES_COMPLETE event otherwise
7946 * hci_conn_drop may run prematurely causing a disconnection.
7947 */
7948 return __hci_cmd_sync_status_sk(hdev,
7949 HCI_OP_LE_READ_ALL_REMOTE_FEATURES,
7950 sizeof(cp), &cp,
7951 HCI_EVT_LE_ALL_REMOTE_FEATURES_COMPLETE,
7952 HCI_CMD_TIMEOUT, NULL);
7953}
7954
7955static int hci_le_read_remote_features_sync(struct hci_dev *hdev, void *data)
7956{
7957 struct hci_conn *conn = data;
7958 struct hci_cp_le_read_remote_features cp;
7959
7960 if (!hci_conn_valid(hdev, conn))
7961 return -ECANCELED;
7962
7963 /* Check if LL Extended Feature Set is supported and
7964 * HCI_OP_LE_READ_ALL_REMOTE_FEATURES is supported then use that to read
7965 * all features.
7966 */
7967 if (ll_ext_feature_capable(hdev) && hdev->commands[47] & BIT(3))
7968 return hci_le_read_all_remote_features_sync(hdev, data);
7969
7970 memset(&cp, 0, sizeof(cp));
7971 cp.handle = cpu_to_le16(conn->handle);
7972
7973 /* Wait for HCI_EV_LE_REMOTE_FEAT_COMPLETE event otherwise
7974 * hci_conn_drop may run prematurely causing a disconnection.
7975 */
7976 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
7977 sizeof(cp), &cp,
7978 HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7979 HCI_CMD_TIMEOUT, NULL);
7980}
7981
7982int hci_le_read_remote_features(struct hci_conn *conn)
7983{
7984 struct hci_dev *hdev = conn->hdev;
7985 int err;
7986
7987 /* The remote features procedure is defined for central
7988 * role only. So only in case of an initiated connection
7989 * request the remote features.
7990 *
7991 * If the local controller supports peripheral-initiated features
7992 * exchange, then requesting the remote features in peripheral
7993 * role is possible. Otherwise just transition into the
7994 * connected state without requesting the remote features.
7995 */
7996 if (conn->out || (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
7997 err = hci_cmd_sync_queue_once(hdev,
7998 hci_le_read_remote_features_sync,
7999 hci_conn_hold(hci_conn_get(conn)),
8000 le_read_features_complete);
8001 if (err) {
8002 hci_conn_drop(conn);
8003 hci_conn_put(conn);
8004 }
8005 } else {
8006 err = -EOPNOTSUPP;
8007 }
8008
8009 return (err == -EEXIST) ? 0 : err;
8010}
8011
8012static void pkt_type_changed(struct hci_dev *hdev, void *data, int err)
8013{
8014 struct hci_cp_change_conn_ptype *cp = data;
8015
8016 bt_dev_dbg(hdev, "err %d", err);
8017
8018 kfree(cp);
8019}
8020
8021static int hci_change_conn_ptype_sync(struct hci_dev *hdev, void *data)
8022{
8023 struct hci_cp_change_conn_ptype *cp = data;
8024
8025 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CHANGE_CONN_PTYPE,
8026 sizeof(*cp), cp,
8027 HCI_EV_PKT_TYPE_CHANGE,
8028 HCI_CMD_TIMEOUT, NULL);
8029}
8030
8031int hci_acl_change_pkt_type(struct hci_conn *conn, u16 pkt_type)
8032{
8033 struct hci_dev *hdev = conn->hdev;
8034 struct hci_cp_change_conn_ptype *cp;
8035 int err;
8036
8037 cp = kmalloc_obj(*cp);
8038 if (!cp)
8039 return -ENOMEM;
8040
8041 cp->handle = cpu_to_le16(conn->handle);
8042 cp->pkt_type = cpu_to_le16(pkt_type);
8043
8044 err = hci_cmd_sync_queue_once(hdev, hci_change_conn_ptype_sync, cp,
8045 pkt_type_changed);
8046 if (err)
8047 kfree(cp);
8048
8049 return (err == -EEXIST) ? 0 : err;
8050}
8051
8052static void le_phy_update_complete(struct hci_dev *hdev, void *data, int err)
8053{
8054 struct hci_cp_le_set_phy *cp = data;
8055
8056 bt_dev_dbg(hdev, "err %d", err);
8057
8058 kfree(cp);
8059}
8060
8061static int hci_le_set_phy_sync(struct hci_dev *hdev, void *data)
8062{
8063 struct hci_cp_le_set_phy *cp = data;
8064
8065 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_SET_PHY,
8066 sizeof(*cp), cp,
8067 HCI_EV_LE_PHY_UPDATE_COMPLETE,
8068 HCI_CMD_TIMEOUT, NULL);
8069}
8070
8071int hci_le_set_phy(struct hci_conn *conn, u8 tx_phys, u8 rx_phys)
8072{
8073 struct hci_dev *hdev = conn->hdev;
8074 struct hci_cp_le_set_phy *cp;
8075 int err;
8076
8077 cp = kmalloc_obj(*cp);
8078 if (!cp)
8079 return -ENOMEM;
8080
8081 memset(cp, 0, sizeof(*cp));
8082 cp->handle = cpu_to_le16(conn->handle);
8083 cp->tx_phys = tx_phys;
8084 cp->rx_phys = rx_phys;
8085
8086 err = hci_cmd_sync_queue_once(hdev, hci_le_set_phy_sync, cp,
8087 le_phy_update_complete);
8088 if (err)
8089 kfree(cp);
8090
8091 return (err == -EEXIST) ? 0 : err;
8092}