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