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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_request.h"
16#include "hci_codec.h"
17#include "hci_debugfs.h"
18#include "smp.h"
19#include "eir.h"
20#include "msft.h"
21#include "aosp.h"
22#include "leds.h"
23
24static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
25 struct sk_buff *skb)
26{
27 bt_dev_dbg(hdev, "result 0x%2.2x", result);
28
29 if (hdev->req_status != HCI_REQ_PEND)
30 return;
31
32 hdev->req_result = result;
33 hdev->req_status = HCI_REQ_DONE;
34
35 if (skb) {
36 struct sock *sk = hci_skb_sk(skb);
37
38 /* Drop sk reference if set */
39 if (sk)
40 sock_put(sk);
41
42 hdev->req_skb = skb_get(skb);
43 }
44
45 wake_up_interruptible(&hdev->req_wait_q);
46}
47
48static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode,
49 u32 plen, const void *param,
50 struct sock *sk)
51{
52 int len = HCI_COMMAND_HDR_SIZE + plen;
53 struct hci_command_hdr *hdr;
54 struct sk_buff *skb;
55
56 skb = bt_skb_alloc(len, GFP_ATOMIC);
57 if (!skb)
58 return NULL;
59
60 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
61 hdr->opcode = cpu_to_le16(opcode);
62 hdr->plen = plen;
63
64 if (plen)
65 skb_put_data(skb, param, plen);
66
67 bt_dev_dbg(hdev, "skb len %d", skb->len);
68
69 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
70 hci_skb_opcode(skb) = opcode;
71
72 /* Grab a reference if command needs to be associated with a sock (e.g.
73 * likely mgmt socket that initiated the command).
74 */
75 if (sk) {
76 hci_skb_sk(skb) = sk;
77 sock_hold(sk);
78 }
79
80 return skb;
81}
82
83static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
84 const void *param, u8 event, struct sock *sk)
85{
86 struct hci_dev *hdev = req->hdev;
87 struct sk_buff *skb;
88
89 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
90
91 /* If an error occurred during request building, there is no point in
92 * queueing the HCI command. We can simply return.
93 */
94 if (req->err)
95 return;
96
97 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
98 if (!skb) {
99 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
100 opcode);
101 req->err = -ENOMEM;
102 return;
103 }
104
105 if (skb_queue_empty(&req->cmd_q))
106 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
107
108 hci_skb_event(skb) = event;
109
110 skb_queue_tail(&req->cmd_q, skb);
111}
112
113static int hci_cmd_sync_run(struct hci_request *req)
114{
115 struct hci_dev *hdev = req->hdev;
116 struct sk_buff *skb;
117 unsigned long flags;
118
119 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
120
121 /* If an error occurred during request building, remove all HCI
122 * commands queued on the HCI request queue.
123 */
124 if (req->err) {
125 skb_queue_purge(&req->cmd_q);
126 return req->err;
127 }
128
129 /* Do not allow empty requests */
130 if (skb_queue_empty(&req->cmd_q))
131 return -ENODATA;
132
133 skb = skb_peek_tail(&req->cmd_q);
134 bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
135 bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
136
137 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
138 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
139 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
140
141 queue_work(hdev->workqueue, &hdev->cmd_work);
142
143 return 0;
144}
145
146/* This function requires the caller holds hdev->req_lock. */
147struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
148 const void *param, u8 event, u32 timeout,
149 struct sock *sk)
150{
151 struct hci_request req;
152 struct sk_buff *skb;
153 int err = 0;
154
155 bt_dev_dbg(hdev, "Opcode 0x%4.4x", opcode);
156
157 hci_req_init(&req, hdev);
158
159 hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
160
161 hdev->req_status = HCI_REQ_PEND;
162
163 err = hci_cmd_sync_run(&req);
164 if (err < 0)
165 return ERR_PTR(err);
166
167 err = wait_event_interruptible_timeout(hdev->req_wait_q,
168 hdev->req_status != HCI_REQ_PEND,
169 timeout);
170
171 if (err == -ERESTARTSYS)
172 return ERR_PTR(-EINTR);
173
174 switch (hdev->req_status) {
175 case HCI_REQ_DONE:
176 err = -bt_to_errno(hdev->req_result);
177 break;
178
179 case HCI_REQ_CANCELED:
180 err = -hdev->req_result;
181 break;
182
183 default:
184 err = -ETIMEDOUT;
185 break;
186 }
187
188 hdev->req_status = 0;
189 hdev->req_result = 0;
190 skb = hdev->req_skb;
191 hdev->req_skb = NULL;
192
193 bt_dev_dbg(hdev, "end: err %d", err);
194
195 if (err < 0) {
196 kfree_skb(skb);
197 return ERR_PTR(err);
198 }
199
200 return skb;
201}
202EXPORT_SYMBOL(__hci_cmd_sync_sk);
203
204/* This function requires the caller holds hdev->req_lock. */
205struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
206 const void *param, u32 timeout)
207{
208 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
209}
210EXPORT_SYMBOL(__hci_cmd_sync);
211
212/* Send HCI command and wait for command complete event */
213struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
214 const void *param, u32 timeout)
215{
216 struct sk_buff *skb;
217
218 if (!test_bit(HCI_UP, &hdev->flags))
219 return ERR_PTR(-ENETDOWN);
220
221 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
222
223 hci_req_sync_lock(hdev);
224 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
225 hci_req_sync_unlock(hdev);
226
227 return skb;
228}
229EXPORT_SYMBOL(hci_cmd_sync);
230
231/* This function requires the caller holds hdev->req_lock. */
232struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
233 const void *param, u8 event, u32 timeout)
234{
235 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
236 NULL);
237}
238EXPORT_SYMBOL(__hci_cmd_sync_ev);
239
240/* This function requires the caller holds hdev->req_lock. */
241int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
242 const void *param, u8 event, u32 timeout,
243 struct sock *sk)
244{
245 struct sk_buff *skb;
246 u8 status;
247
248 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
249 if (IS_ERR(skb)) {
250 if (!event)
251 bt_dev_err(hdev, "Opcode 0x%4.4x failed: %ld", opcode,
252 PTR_ERR(skb));
253 return PTR_ERR(skb);
254 }
255
256 /* If command return a status event skb will be set to NULL as there are
257 * no parameters, in case of failure IS_ERR(skb) would have be set to
258 * the actual error would be found with PTR_ERR(skb).
259 */
260 if (!skb)
261 return 0;
262
263 status = skb->data[0];
264
265 kfree_skb(skb);
266
267 return status;
268}
269EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
270
271int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
272 const void *param, u32 timeout)
273{
274 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
275 NULL);
276}
277EXPORT_SYMBOL(__hci_cmd_sync_status);
278
279static void hci_cmd_sync_work(struct work_struct *work)
280{
281 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
282
283 bt_dev_dbg(hdev, "");
284
285 /* Dequeue all entries and run them */
286 while (1) {
287 struct hci_cmd_sync_work_entry *entry;
288
289 mutex_lock(&hdev->cmd_sync_work_lock);
290 entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
291 struct hci_cmd_sync_work_entry,
292 list);
293 if (entry)
294 list_del(&entry->list);
295 mutex_unlock(&hdev->cmd_sync_work_lock);
296
297 if (!entry)
298 break;
299
300 bt_dev_dbg(hdev, "entry %p", entry);
301
302 if (entry->func) {
303 int err;
304
305 hci_req_sync_lock(hdev);
306 err = entry->func(hdev, entry->data);
307 if (entry->destroy)
308 entry->destroy(hdev, entry->data, err);
309 hci_req_sync_unlock(hdev);
310 }
311
312 kfree(entry);
313 }
314}
315
316static void hci_cmd_sync_cancel_work(struct work_struct *work)
317{
318 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
319
320 cancel_delayed_work_sync(&hdev->cmd_timer);
321 cancel_delayed_work_sync(&hdev->ncmd_timer);
322 atomic_set(&hdev->cmd_cnt, 1);
323
324 wake_up_interruptible(&hdev->req_wait_q);
325}
326
327static int hci_scan_disable_sync(struct hci_dev *hdev);
328static int scan_disable_sync(struct hci_dev *hdev, void *data)
329{
330 return hci_scan_disable_sync(hdev);
331}
332
333static int hci_inquiry_sync(struct hci_dev *hdev, u8 length);
334static int interleaved_inquiry_sync(struct hci_dev *hdev, void *data)
335{
336 return hci_inquiry_sync(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN);
337}
338
339static void le_scan_disable(struct work_struct *work)
340{
341 struct hci_dev *hdev = container_of(work, struct hci_dev,
342 le_scan_disable.work);
343 int status;
344
345 bt_dev_dbg(hdev, "");
346 hci_dev_lock(hdev);
347
348 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
349 goto _return;
350
351 status = hci_cmd_sync_queue(hdev, scan_disable_sync, NULL, NULL);
352 if (status) {
353 bt_dev_err(hdev, "failed to disable LE scan: %d", status);
354 goto _return;
355 }
356
357 hdev->discovery.scan_start = 0;
358
359 /* If we were running LE only scan, change discovery state. If
360 * we were running both LE and BR/EDR inquiry simultaneously,
361 * and BR/EDR inquiry is already finished, stop discovery,
362 * otherwise BR/EDR inquiry will stop discovery when finished.
363 * If we will resolve remote device name, do not change
364 * discovery state.
365 */
366
367 if (hdev->discovery.type == DISCOV_TYPE_LE)
368 goto discov_stopped;
369
370 if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED)
371 goto _return;
372
373 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) {
374 if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
375 hdev->discovery.state != DISCOVERY_RESOLVING)
376 goto discov_stopped;
377
378 goto _return;
379 }
380
381 status = hci_cmd_sync_queue(hdev, interleaved_inquiry_sync, NULL, NULL);
382 if (status) {
383 bt_dev_err(hdev, "inquiry failed: status %d", status);
384 goto discov_stopped;
385 }
386
387 goto _return;
388
389discov_stopped:
390 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
391
392_return:
393 hci_dev_unlock(hdev);
394}
395
396static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
397 u8 filter_dup);
398
399static int reenable_adv_sync(struct hci_dev *hdev, void *data)
400{
401 bt_dev_dbg(hdev, "");
402
403 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
404 list_empty(&hdev->adv_instances))
405 return 0;
406
407 if (hdev->cur_adv_instance) {
408 return hci_schedule_adv_instance_sync(hdev,
409 hdev->cur_adv_instance,
410 true);
411 } else {
412 if (ext_adv_capable(hdev)) {
413 hci_start_ext_adv_sync(hdev, 0x00);
414 } else {
415 hci_update_adv_data_sync(hdev, 0x00);
416 hci_update_scan_rsp_data_sync(hdev, 0x00);
417 hci_enable_advertising_sync(hdev);
418 }
419 }
420
421 return 0;
422}
423
424static void reenable_adv(struct work_struct *work)
425{
426 struct hci_dev *hdev = container_of(work, struct hci_dev,
427 reenable_adv_work);
428 int status;
429
430 bt_dev_dbg(hdev, "");
431
432 hci_dev_lock(hdev);
433
434 status = hci_cmd_sync_queue(hdev, reenable_adv_sync, NULL, NULL);
435 if (status)
436 bt_dev_err(hdev, "failed to reenable ADV: %d", status);
437
438 hci_dev_unlock(hdev);
439}
440
441static void cancel_adv_timeout(struct hci_dev *hdev)
442{
443 if (hdev->adv_instance_timeout) {
444 hdev->adv_instance_timeout = 0;
445 cancel_delayed_work(&hdev->adv_instance_expire);
446 }
447}
448
449/* For a single instance:
450 * - force == true: The instance will be removed even when its remaining
451 * lifetime is not zero.
452 * - force == false: the instance will be deactivated but kept stored unless
453 * the remaining lifetime is zero.
454 *
455 * For instance == 0x00:
456 * - force == true: All instances will be removed regardless of their timeout
457 * setting.
458 * - force == false: Only instances that have a timeout will be removed.
459 */
460int hci_clear_adv_instance_sync(struct hci_dev *hdev, struct sock *sk,
461 u8 instance, bool force)
462{
463 struct adv_info *adv_instance, *n, *next_instance = NULL;
464 int err;
465 u8 rem_inst;
466
467 /* Cancel any timeout concerning the removed instance(s). */
468 if (!instance || hdev->cur_adv_instance == instance)
469 cancel_adv_timeout(hdev);
470
471 /* Get the next instance to advertise BEFORE we remove
472 * the current one. This can be the same instance again
473 * if there is only one instance.
474 */
475 if (instance && hdev->cur_adv_instance == instance)
476 next_instance = hci_get_next_instance(hdev, instance);
477
478 if (instance == 0x00) {
479 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances,
480 list) {
481 if (!(force || adv_instance->timeout))
482 continue;
483
484 rem_inst = adv_instance->instance;
485 err = hci_remove_adv_instance(hdev, rem_inst);
486 if (!err)
487 mgmt_advertising_removed(sk, hdev, rem_inst);
488 }
489 } else {
490 adv_instance = hci_find_adv_instance(hdev, instance);
491
492 if (force || (adv_instance && adv_instance->timeout &&
493 !adv_instance->remaining_time)) {
494 /* Don't advertise a removed instance. */
495 if (next_instance &&
496 next_instance->instance == instance)
497 next_instance = NULL;
498
499 err = hci_remove_adv_instance(hdev, instance);
500 if (!err)
501 mgmt_advertising_removed(sk, hdev, instance);
502 }
503 }
504
505 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
506 return 0;
507
508 if (next_instance && !ext_adv_capable(hdev))
509 return hci_schedule_adv_instance_sync(hdev,
510 next_instance->instance,
511 false);
512
513 return 0;
514}
515
516static int adv_timeout_expire_sync(struct hci_dev *hdev, void *data)
517{
518 u8 instance = *(u8 *)data;
519
520 kfree(data);
521
522 hci_clear_adv_instance_sync(hdev, NULL, instance, false);
523
524 if (list_empty(&hdev->adv_instances))
525 return hci_disable_advertising_sync(hdev);
526
527 return 0;
528}
529
530static void adv_timeout_expire(struct work_struct *work)
531{
532 u8 *inst_ptr;
533 struct hci_dev *hdev = container_of(work, struct hci_dev,
534 adv_instance_expire.work);
535
536 bt_dev_dbg(hdev, "");
537
538 hci_dev_lock(hdev);
539
540 hdev->adv_instance_timeout = 0;
541
542 if (hdev->cur_adv_instance == 0x00)
543 goto unlock;
544
545 inst_ptr = kmalloc(1, GFP_KERNEL);
546 if (!inst_ptr)
547 goto unlock;
548
549 *inst_ptr = hdev->cur_adv_instance;
550 hci_cmd_sync_queue(hdev, adv_timeout_expire_sync, inst_ptr, NULL);
551
552unlock:
553 hci_dev_unlock(hdev);
554}
555
556void hci_cmd_sync_init(struct hci_dev *hdev)
557{
558 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
559 INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
560 mutex_init(&hdev->cmd_sync_work_lock);
561 mutex_init(&hdev->unregister_lock);
562
563 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
564 INIT_WORK(&hdev->reenable_adv_work, reenable_adv);
565 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable);
566 INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
567}
568
569void hci_cmd_sync_clear(struct hci_dev *hdev)
570{
571 struct hci_cmd_sync_work_entry *entry, *tmp;
572
573 cancel_work_sync(&hdev->cmd_sync_work);
574 cancel_work_sync(&hdev->reenable_adv_work);
575
576 mutex_lock(&hdev->cmd_sync_work_lock);
577 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
578 if (entry->destroy)
579 entry->destroy(hdev, entry->data, -ECANCELED);
580
581 list_del(&entry->list);
582 kfree(entry);
583 }
584 mutex_unlock(&hdev->cmd_sync_work_lock);
585}
586
587void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
588{
589 bt_dev_dbg(hdev, "err 0x%2.2x", err);
590
591 if (hdev->req_status == HCI_REQ_PEND) {
592 hdev->req_result = err;
593 hdev->req_status = HCI_REQ_CANCELED;
594
595 cancel_delayed_work_sync(&hdev->cmd_timer);
596 cancel_delayed_work_sync(&hdev->ncmd_timer);
597 atomic_set(&hdev->cmd_cnt, 1);
598
599 wake_up_interruptible(&hdev->req_wait_q);
600 }
601}
602
603void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
604{
605 bt_dev_dbg(hdev, "err 0x%2.2x", err);
606
607 if (hdev->req_status == HCI_REQ_PEND) {
608 hdev->req_result = err;
609 hdev->req_status = HCI_REQ_CANCELED;
610
611 queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
612 }
613}
614EXPORT_SYMBOL(hci_cmd_sync_cancel);
615
616/* Submit HCI command to be run in as cmd_sync_work:
617 *
618 * - hdev must _not_ be unregistered
619 */
620int hci_cmd_sync_submit(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
621 void *data, hci_cmd_sync_work_destroy_t destroy)
622{
623 struct hci_cmd_sync_work_entry *entry;
624 int err = 0;
625
626 mutex_lock(&hdev->unregister_lock);
627 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
628 err = -ENODEV;
629 goto unlock;
630 }
631
632 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
633 if (!entry) {
634 err = -ENOMEM;
635 goto unlock;
636 }
637 entry->func = func;
638 entry->data = data;
639 entry->destroy = destroy;
640
641 mutex_lock(&hdev->cmd_sync_work_lock);
642 list_add_tail(&entry->list, &hdev->cmd_sync_work_list);
643 mutex_unlock(&hdev->cmd_sync_work_lock);
644
645 queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
646
647unlock:
648 mutex_unlock(&hdev->unregister_lock);
649 return err;
650}
651EXPORT_SYMBOL(hci_cmd_sync_submit);
652
653/* Queue HCI command:
654 *
655 * - hdev must be running
656 */
657int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
658 void *data, hci_cmd_sync_work_destroy_t destroy)
659{
660 /* Only queue command if hdev is running which means it had been opened
661 * and is either on init phase or is already up.
662 */
663 if (!test_bit(HCI_RUNNING, &hdev->flags))
664 return -ENETDOWN;
665
666 return hci_cmd_sync_submit(hdev, func, data, destroy);
667}
668EXPORT_SYMBOL(hci_cmd_sync_queue);
669
670int hci_update_eir_sync(struct hci_dev *hdev)
671{
672 struct hci_cp_write_eir cp;
673
674 bt_dev_dbg(hdev, "");
675
676 if (!hdev_is_powered(hdev))
677 return 0;
678
679 if (!lmp_ext_inq_capable(hdev))
680 return 0;
681
682 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
683 return 0;
684
685 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
686 return 0;
687
688 memset(&cp, 0, sizeof(cp));
689
690 eir_create(hdev, cp.data);
691
692 if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
693 return 0;
694
695 memcpy(hdev->eir, cp.data, sizeof(cp.data));
696
697 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
698 HCI_CMD_TIMEOUT);
699}
700
701static u8 get_service_classes(struct hci_dev *hdev)
702{
703 struct bt_uuid *uuid;
704 u8 val = 0;
705
706 list_for_each_entry(uuid, &hdev->uuids, list)
707 val |= uuid->svc_hint;
708
709 return val;
710}
711
712int hci_update_class_sync(struct hci_dev *hdev)
713{
714 u8 cod[3];
715
716 bt_dev_dbg(hdev, "");
717
718 if (!hdev_is_powered(hdev))
719 return 0;
720
721 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
722 return 0;
723
724 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
725 return 0;
726
727 cod[0] = hdev->minor_class;
728 cod[1] = hdev->major_class;
729 cod[2] = get_service_classes(hdev);
730
731 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
732 cod[1] |= 0x20;
733
734 if (memcmp(cod, hdev->dev_class, 3) == 0)
735 return 0;
736
737 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
738 sizeof(cod), cod, HCI_CMD_TIMEOUT);
739}
740
741static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
742{
743 /* If there is no connection we are OK to advertise. */
744 if (hci_conn_num(hdev, LE_LINK) == 0)
745 return true;
746
747 /* Check le_states if there is any connection in peripheral role. */
748 if (hdev->conn_hash.le_num_peripheral > 0) {
749 /* Peripheral connection state and non connectable mode
750 * bit 20.
751 */
752 if (!connectable && !(hdev->le_states[2] & 0x10))
753 return false;
754
755 /* Peripheral connection state and connectable mode bit 38
756 * and scannable bit 21.
757 */
758 if (connectable && (!(hdev->le_states[4] & 0x40) ||
759 !(hdev->le_states[2] & 0x20)))
760 return false;
761 }
762
763 /* Check le_states if there is any connection in central role. */
764 if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
765 /* Central connection state and non connectable mode bit 18. */
766 if (!connectable && !(hdev->le_states[2] & 0x02))
767 return false;
768
769 /* Central connection state and connectable mode bit 35 and
770 * scannable 19.
771 */
772 if (connectable && (!(hdev->le_states[4] & 0x08) ||
773 !(hdev->le_states[2] & 0x08)))
774 return false;
775 }
776
777 return true;
778}
779
780static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
781{
782 /* If privacy is not enabled don't use RPA */
783 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
784 return false;
785
786 /* If basic privacy mode is enabled use RPA */
787 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
788 return true;
789
790 /* If limited privacy mode is enabled don't use RPA if we're
791 * both discoverable and bondable.
792 */
793 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
794 hci_dev_test_flag(hdev, HCI_BONDABLE))
795 return false;
796
797 /* We're neither bondable nor discoverable in the limited
798 * privacy mode, therefore use RPA.
799 */
800 return true;
801}
802
803static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
804{
805 /* If we're advertising or initiating an LE connection we can't
806 * go ahead and change the random address at this time. This is
807 * because the eventual initiator address used for the
808 * subsequently created connection will be undefined (some
809 * controllers use the new address and others the one we had
810 * when the operation started).
811 *
812 * In this kind of scenario skip the update and let the random
813 * address be updated at the next cycle.
814 */
815 if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
816 hci_lookup_le_connect(hdev)) {
817 bt_dev_dbg(hdev, "Deferring random address update");
818 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
819 return 0;
820 }
821
822 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
823 6, rpa, HCI_CMD_TIMEOUT);
824}
825
826int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
827 bool rpa, u8 *own_addr_type)
828{
829 int err;
830
831 /* If privacy is enabled use a resolvable private address. If
832 * current RPA has expired or there is something else than
833 * the current RPA in use, then generate a new one.
834 */
835 if (rpa) {
836 /* If Controller supports LL Privacy use own address type is
837 * 0x03
838 */
839 if (use_ll_privacy(hdev))
840 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
841 else
842 *own_addr_type = ADDR_LE_DEV_RANDOM;
843
844 /* Check if RPA is valid */
845 if (rpa_valid(hdev))
846 return 0;
847
848 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
849 if (err < 0) {
850 bt_dev_err(hdev, "failed to generate new RPA");
851 return err;
852 }
853
854 err = hci_set_random_addr_sync(hdev, &hdev->rpa);
855 if (err)
856 return err;
857
858 return 0;
859 }
860
861 /* In case of required privacy without resolvable private address,
862 * use an non-resolvable private address. This is useful for active
863 * scanning and non-connectable advertising.
864 */
865 if (require_privacy) {
866 bdaddr_t nrpa;
867
868 while (true) {
869 /* The non-resolvable private address is generated
870 * from random six bytes with the two most significant
871 * bits cleared.
872 */
873 get_random_bytes(&nrpa, 6);
874 nrpa.b[5] &= 0x3f;
875
876 /* The non-resolvable private address shall not be
877 * equal to the public address.
878 */
879 if (bacmp(&hdev->bdaddr, &nrpa))
880 break;
881 }
882
883 *own_addr_type = ADDR_LE_DEV_RANDOM;
884
885 return hci_set_random_addr_sync(hdev, &nrpa);
886 }
887
888 /* If forcing static address is in use or there is no public
889 * address use the static address as random address (but skip
890 * the HCI command if the current random address is already the
891 * static one.
892 *
893 * In case BR/EDR has been disabled on a dual-mode controller
894 * and a static address has been configured, then use that
895 * address instead of the public BR/EDR address.
896 */
897 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
898 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
899 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
900 bacmp(&hdev->static_addr, BDADDR_ANY))) {
901 *own_addr_type = ADDR_LE_DEV_RANDOM;
902 if (bacmp(&hdev->static_addr, &hdev->random_addr))
903 return hci_set_random_addr_sync(hdev,
904 &hdev->static_addr);
905 return 0;
906 }
907
908 /* Neither privacy nor static address is being used so use a
909 * public address.
910 */
911 *own_addr_type = ADDR_LE_DEV_PUBLIC;
912
913 return 0;
914}
915
916static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
917{
918 struct hci_cp_le_set_ext_adv_enable *cp;
919 struct hci_cp_ext_adv_set *set;
920 u8 data[sizeof(*cp) + sizeof(*set) * 1];
921 u8 size;
922
923 /* If request specifies an instance that doesn't exist, fail */
924 if (instance > 0) {
925 struct adv_info *adv;
926
927 adv = hci_find_adv_instance(hdev, instance);
928 if (!adv)
929 return -EINVAL;
930
931 /* If not enabled there is nothing to do */
932 if (!adv->enabled)
933 return 0;
934 }
935
936 memset(data, 0, sizeof(data));
937
938 cp = (void *)data;
939 set = (void *)cp->data;
940
941 /* Instance 0x00 indicates all advertising instances will be disabled */
942 cp->num_of_sets = !!instance;
943 cp->enable = 0x00;
944
945 set->handle = instance;
946
947 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
948
949 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
950 size, data, HCI_CMD_TIMEOUT);
951}
952
953static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
954 bdaddr_t *random_addr)
955{
956 struct hci_cp_le_set_adv_set_rand_addr cp;
957 int err;
958
959 if (!instance) {
960 /* Instance 0x00 doesn't have an adv_info, instead it uses
961 * hdev->random_addr to track its address so whenever it needs
962 * to be updated this also set the random address since
963 * hdev->random_addr is shared with scan state machine.
964 */
965 err = hci_set_random_addr_sync(hdev, random_addr);
966 if (err)
967 return err;
968 }
969
970 memset(&cp, 0, sizeof(cp));
971
972 cp.handle = instance;
973 bacpy(&cp.bdaddr, random_addr);
974
975 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
976 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
977}
978
979int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
980{
981 struct hci_cp_le_set_ext_adv_params cp;
982 bool connectable;
983 u32 flags;
984 bdaddr_t random_addr;
985 u8 own_addr_type;
986 int err;
987 struct adv_info *adv;
988 bool secondary_adv;
989
990 if (instance > 0) {
991 adv = hci_find_adv_instance(hdev, instance);
992 if (!adv)
993 return -EINVAL;
994 } else {
995 adv = NULL;
996 }
997
998 /* Updating parameters of an active instance will return a
999 * Command Disallowed error, so we must first disable the
1000 * instance if it is active.
1001 */
1002 if (adv && !adv->pending) {
1003 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1004 if (err)
1005 return err;
1006 }
1007
1008 flags = hci_adv_instance_flags(hdev, instance);
1009
1010 /* If the "connectable" instance flag was not set, then choose between
1011 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1012 */
1013 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1014 mgmt_get_connectable(hdev);
1015
1016 if (!is_advertising_allowed(hdev, connectable))
1017 return -EPERM;
1018
1019 /* Set require_privacy to true only when non-connectable
1020 * advertising is used. In that case it is fine to use a
1021 * non-resolvable private address.
1022 */
1023 err = hci_get_random_address(hdev, !connectable,
1024 adv_use_rpa(hdev, flags), adv,
1025 &own_addr_type, &random_addr);
1026 if (err < 0)
1027 return err;
1028
1029 memset(&cp, 0, sizeof(cp));
1030
1031 if (adv) {
1032 hci_cpu_to_le24(adv->min_interval, cp.min_interval);
1033 hci_cpu_to_le24(adv->max_interval, cp.max_interval);
1034 cp.tx_power = adv->tx_power;
1035 } else {
1036 hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
1037 hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
1038 cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
1039 }
1040
1041 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
1042
1043 if (connectable) {
1044 if (secondary_adv)
1045 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
1046 else
1047 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
1048 } else if (hci_adv_instance_is_scannable(hdev, instance) ||
1049 (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
1050 if (secondary_adv)
1051 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
1052 else
1053 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
1054 } else {
1055 if (secondary_adv)
1056 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
1057 else
1058 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
1059 }
1060
1061 /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
1062 * contains the peer’s Identity Address and the Peer_Address_Type
1063 * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
1064 * These parameters are used to locate the corresponding local IRK in
1065 * the resolving list; this IRK is used to generate their own address
1066 * used in the advertisement.
1067 */
1068 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
1069 hci_copy_identity_address(hdev, &cp.peer_addr,
1070 &cp.peer_addr_type);
1071
1072 cp.own_addr_type = own_addr_type;
1073 cp.channel_map = hdev->le_adv_channel_map;
1074 cp.handle = instance;
1075
1076 if (flags & MGMT_ADV_FLAG_SEC_2M) {
1077 cp.primary_phy = HCI_ADV_PHY_1M;
1078 cp.secondary_phy = HCI_ADV_PHY_2M;
1079 } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
1080 cp.primary_phy = HCI_ADV_PHY_CODED;
1081 cp.secondary_phy = HCI_ADV_PHY_CODED;
1082 } else {
1083 /* In all other cases use 1M */
1084 cp.primary_phy = HCI_ADV_PHY_1M;
1085 cp.secondary_phy = HCI_ADV_PHY_1M;
1086 }
1087
1088 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
1089 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1090 if (err)
1091 return err;
1092
1093 if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
1094 own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
1095 bacmp(&random_addr, BDADDR_ANY)) {
1096 /* Check if random address need to be updated */
1097 if (adv) {
1098 if (!bacmp(&random_addr, &adv->random_addr))
1099 return 0;
1100 } else {
1101 if (!bacmp(&random_addr, &hdev->random_addr))
1102 return 0;
1103 }
1104
1105 return hci_set_adv_set_random_addr_sync(hdev, instance,
1106 &random_addr);
1107 }
1108
1109 return 0;
1110}
1111
1112static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1113{
1114 struct {
1115 struct hci_cp_le_set_ext_scan_rsp_data cp;
1116 u8 data[HCI_MAX_EXT_AD_LENGTH];
1117 } pdu;
1118 u8 len;
1119 struct adv_info *adv = NULL;
1120 int err;
1121
1122 memset(&pdu, 0, sizeof(pdu));
1123
1124 if (instance) {
1125 adv = hci_find_adv_instance(hdev, instance);
1126 if (!adv || !adv->scan_rsp_changed)
1127 return 0;
1128 }
1129
1130 len = eir_create_scan_rsp(hdev, instance, pdu.data);
1131
1132 pdu.cp.handle = instance;
1133 pdu.cp.length = len;
1134 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1135 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1136
1137 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
1138 sizeof(pdu.cp) + len, &pdu.cp,
1139 HCI_CMD_TIMEOUT);
1140 if (err)
1141 return err;
1142
1143 if (adv) {
1144 adv->scan_rsp_changed = false;
1145 } else {
1146 memcpy(hdev->scan_rsp_data, pdu.data, len);
1147 hdev->scan_rsp_data_len = len;
1148 }
1149
1150 return 0;
1151}
1152
1153static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1154{
1155 struct hci_cp_le_set_scan_rsp_data cp;
1156 u8 len;
1157
1158 memset(&cp, 0, sizeof(cp));
1159
1160 len = eir_create_scan_rsp(hdev, instance, cp.data);
1161
1162 if (hdev->scan_rsp_data_len == len &&
1163 !memcmp(cp.data, hdev->scan_rsp_data, len))
1164 return 0;
1165
1166 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
1167 hdev->scan_rsp_data_len = len;
1168
1169 cp.length = len;
1170
1171 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
1172 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1173}
1174
1175int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1176{
1177 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1178 return 0;
1179
1180 if (ext_adv_capable(hdev))
1181 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
1182
1183 return __hci_set_scan_rsp_data_sync(hdev, instance);
1184}
1185
1186int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
1187{
1188 struct hci_cp_le_set_ext_adv_enable *cp;
1189 struct hci_cp_ext_adv_set *set;
1190 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1191 struct adv_info *adv;
1192
1193 if (instance > 0) {
1194 adv = hci_find_adv_instance(hdev, instance);
1195 if (!adv)
1196 return -EINVAL;
1197 /* If already enabled there is nothing to do */
1198 if (adv->enabled)
1199 return 0;
1200 } else {
1201 adv = NULL;
1202 }
1203
1204 cp = (void *)data;
1205 set = (void *)cp->data;
1206
1207 memset(cp, 0, sizeof(*cp));
1208
1209 cp->enable = 0x01;
1210 cp->num_of_sets = 0x01;
1211
1212 memset(set, 0, sizeof(*set));
1213
1214 set->handle = instance;
1215
1216 /* Set duration per instance since controller is responsible for
1217 * scheduling it.
1218 */
1219 if (adv && adv->timeout) {
1220 u16 duration = adv->timeout * MSEC_PER_SEC;
1221
1222 /* Time = N * 10 ms */
1223 set->duration = cpu_to_le16(duration / 10);
1224 }
1225
1226 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1227 sizeof(*cp) +
1228 sizeof(*set) * cp->num_of_sets,
1229 data, HCI_CMD_TIMEOUT);
1230}
1231
1232int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
1233{
1234 int err;
1235
1236 err = hci_setup_ext_adv_instance_sync(hdev, instance);
1237 if (err)
1238 return err;
1239
1240 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
1241 if (err)
1242 return err;
1243
1244 return hci_enable_ext_advertising_sync(hdev, instance);
1245}
1246
1247int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1248{
1249 struct hci_cp_le_set_per_adv_enable cp;
1250 struct adv_info *adv = NULL;
1251
1252 /* If periodic advertising already disabled there is nothing to do. */
1253 adv = hci_find_adv_instance(hdev, instance);
1254 if (!adv || !adv->periodic || !adv->enabled)
1255 return 0;
1256
1257 memset(&cp, 0, sizeof(cp));
1258
1259 cp.enable = 0x00;
1260 cp.handle = instance;
1261
1262 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1263 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1264}
1265
1266static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance,
1267 u16 min_interval, u16 max_interval)
1268{
1269 struct hci_cp_le_set_per_adv_params cp;
1270
1271 memset(&cp, 0, sizeof(cp));
1272
1273 if (!min_interval)
1274 min_interval = DISCOV_LE_PER_ADV_INT_MIN;
1275
1276 if (!max_interval)
1277 max_interval = DISCOV_LE_PER_ADV_INT_MAX;
1278
1279 cp.handle = instance;
1280 cp.min_interval = cpu_to_le16(min_interval);
1281 cp.max_interval = cpu_to_le16(max_interval);
1282 cp.periodic_properties = 0x0000;
1283
1284 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS,
1285 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1286}
1287
1288static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance)
1289{
1290 struct {
1291 struct hci_cp_le_set_per_adv_data cp;
1292 u8 data[HCI_MAX_PER_AD_LENGTH];
1293 } pdu;
1294 u8 len;
1295
1296 memset(&pdu, 0, sizeof(pdu));
1297
1298 if (instance) {
1299 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1300
1301 if (!adv || !adv->periodic)
1302 return 0;
1303 }
1304
1305 len = eir_create_per_adv_data(hdev, instance, pdu.data);
1306
1307 pdu.cp.length = len;
1308 pdu.cp.handle = instance;
1309 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1310
1311 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA,
1312 sizeof(pdu.cp) + len, &pdu,
1313 HCI_CMD_TIMEOUT);
1314}
1315
1316static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1317{
1318 struct hci_cp_le_set_per_adv_enable cp;
1319 struct adv_info *adv = NULL;
1320
1321 /* If periodic advertising already enabled there is nothing to do. */
1322 adv = hci_find_adv_instance(hdev, instance);
1323 if (adv && adv->periodic && adv->enabled)
1324 return 0;
1325
1326 memset(&cp, 0, sizeof(cp));
1327
1328 cp.enable = 0x01;
1329 cp.handle = instance;
1330
1331 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1332 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1333}
1334
1335/* Checks if periodic advertising data contains a Basic Announcement and if it
1336 * does generates a Broadcast ID and add Broadcast Announcement.
1337 */
1338static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv)
1339{
1340 u8 bid[3];
1341 u8 ad[4 + 3];
1342
1343 /* Skip if NULL adv as instance 0x00 is used for general purpose
1344 * advertising so it cannot used for the likes of Broadcast Announcement
1345 * as it can be overwritten at any point.
1346 */
1347 if (!adv)
1348 return 0;
1349
1350 /* Check if PA data doesn't contains a Basic Audio Announcement then
1351 * there is nothing to do.
1352 */
1353 if (!eir_get_service_data(adv->per_adv_data, adv->per_adv_data_len,
1354 0x1851, NULL))
1355 return 0;
1356
1357 /* Check if advertising data already has a Broadcast Announcement since
1358 * the process may want to control the Broadcast ID directly and in that
1359 * case the kernel shall no interfere.
1360 */
1361 if (eir_get_service_data(adv->adv_data, adv->adv_data_len, 0x1852,
1362 NULL))
1363 return 0;
1364
1365 /* Generate Broadcast ID */
1366 get_random_bytes(bid, sizeof(bid));
1367 eir_append_service_data(ad, 0, 0x1852, bid, sizeof(bid));
1368 hci_set_adv_instance_data(hdev, adv->instance, sizeof(ad), ad, 0, NULL);
1369
1370 return hci_update_adv_data_sync(hdev, adv->instance);
1371}
1372
1373int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len,
1374 u8 *data, u32 flags, u16 min_interval,
1375 u16 max_interval, u16 sync_interval)
1376{
1377 struct adv_info *adv = NULL;
1378 int err;
1379 bool added = false;
1380
1381 hci_disable_per_advertising_sync(hdev, instance);
1382
1383 if (instance) {
1384 adv = hci_find_adv_instance(hdev, instance);
1385 /* Create an instance if that could not be found */
1386 if (!adv) {
1387 adv = hci_add_per_instance(hdev, instance, flags,
1388 data_len, data,
1389 sync_interval,
1390 sync_interval);
1391 if (IS_ERR(adv))
1392 return PTR_ERR(adv);
1393 adv->pending = false;
1394 added = true;
1395 }
1396 }
1397
1398 /* Start advertising */
1399 err = hci_start_ext_adv_sync(hdev, instance);
1400 if (err < 0)
1401 goto fail;
1402
1403 err = hci_adv_bcast_annoucement(hdev, adv);
1404 if (err < 0)
1405 goto fail;
1406
1407 err = hci_set_per_adv_params_sync(hdev, instance, min_interval,
1408 max_interval);
1409 if (err < 0)
1410 goto fail;
1411
1412 err = hci_set_per_adv_data_sync(hdev, instance);
1413 if (err < 0)
1414 goto fail;
1415
1416 err = hci_enable_per_advertising_sync(hdev, instance);
1417 if (err < 0)
1418 goto fail;
1419
1420 return 0;
1421
1422fail:
1423 if (added)
1424 hci_remove_adv_instance(hdev, instance);
1425
1426 return err;
1427}
1428
1429static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
1430{
1431 int err;
1432
1433 if (ext_adv_capable(hdev))
1434 return hci_start_ext_adv_sync(hdev, instance);
1435
1436 err = hci_update_adv_data_sync(hdev, instance);
1437 if (err)
1438 return err;
1439
1440 err = hci_update_scan_rsp_data_sync(hdev, instance);
1441 if (err)
1442 return err;
1443
1444 return hci_enable_advertising_sync(hdev);
1445}
1446
1447int hci_enable_advertising_sync(struct hci_dev *hdev)
1448{
1449 struct adv_info *adv_instance;
1450 struct hci_cp_le_set_adv_param cp;
1451 u8 own_addr_type, enable = 0x01;
1452 bool connectable;
1453 u16 adv_min_interval, adv_max_interval;
1454 u32 flags;
1455 u8 status;
1456
1457 if (ext_adv_capable(hdev))
1458 return hci_enable_ext_advertising_sync(hdev,
1459 hdev->cur_adv_instance);
1460
1461 flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
1462 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
1463
1464 /* If the "connectable" instance flag was not set, then choose between
1465 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1466 */
1467 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1468 mgmt_get_connectable(hdev);
1469
1470 if (!is_advertising_allowed(hdev, connectable))
1471 return -EINVAL;
1472
1473 status = hci_disable_advertising_sync(hdev);
1474 if (status)
1475 return status;
1476
1477 /* Clear the HCI_LE_ADV bit temporarily so that the
1478 * hci_update_random_address knows that it's safe to go ahead
1479 * and write a new random address. The flag will be set back on
1480 * as soon as the SET_ADV_ENABLE HCI command completes.
1481 */
1482 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1483
1484 /* Set require_privacy to true only when non-connectable
1485 * advertising is used. In that case it is fine to use a
1486 * non-resolvable private address.
1487 */
1488 status = hci_update_random_address_sync(hdev, !connectable,
1489 adv_use_rpa(hdev, flags),
1490 &own_addr_type);
1491 if (status)
1492 return status;
1493
1494 memset(&cp, 0, sizeof(cp));
1495
1496 if (adv_instance) {
1497 adv_min_interval = adv_instance->min_interval;
1498 adv_max_interval = adv_instance->max_interval;
1499 } else {
1500 adv_min_interval = hdev->le_adv_min_interval;
1501 adv_max_interval = hdev->le_adv_max_interval;
1502 }
1503
1504 if (connectable) {
1505 cp.type = LE_ADV_IND;
1506 } else {
1507 if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
1508 cp.type = LE_ADV_SCAN_IND;
1509 else
1510 cp.type = LE_ADV_NONCONN_IND;
1511
1512 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1513 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
1514 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
1515 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
1516 }
1517 }
1518
1519 cp.min_interval = cpu_to_le16(adv_min_interval);
1520 cp.max_interval = cpu_to_le16(adv_max_interval);
1521 cp.own_address_type = own_addr_type;
1522 cp.channel_map = hdev->le_adv_channel_map;
1523
1524 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
1525 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1526 if (status)
1527 return status;
1528
1529 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1530 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1531}
1532
1533static int enable_advertising_sync(struct hci_dev *hdev, void *data)
1534{
1535 return hci_enable_advertising_sync(hdev);
1536}
1537
1538int hci_enable_advertising(struct hci_dev *hdev)
1539{
1540 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
1541 list_empty(&hdev->adv_instances))
1542 return 0;
1543
1544 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
1545}
1546
1547int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1548 struct sock *sk)
1549{
1550 int err;
1551
1552 if (!ext_adv_capable(hdev))
1553 return 0;
1554
1555 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1556 if (err)
1557 return err;
1558
1559 /* If request specifies an instance that doesn't exist, fail */
1560 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
1561 return -EINVAL;
1562
1563 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
1564 sizeof(instance), &instance, 0,
1565 HCI_CMD_TIMEOUT, sk);
1566}
1567
1568static int remove_ext_adv_sync(struct hci_dev *hdev, void *data)
1569{
1570 struct adv_info *adv = data;
1571 u8 instance = 0;
1572
1573 if (adv)
1574 instance = adv->instance;
1575
1576 return hci_remove_ext_adv_instance_sync(hdev, instance, NULL);
1577}
1578
1579int hci_remove_ext_adv_instance(struct hci_dev *hdev, u8 instance)
1580{
1581 struct adv_info *adv = NULL;
1582
1583 if (instance) {
1584 adv = hci_find_adv_instance(hdev, instance);
1585 if (!adv)
1586 return -EINVAL;
1587 }
1588
1589 return hci_cmd_sync_queue(hdev, remove_ext_adv_sync, adv, NULL);
1590}
1591
1592int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason)
1593{
1594 struct hci_cp_le_term_big cp;
1595
1596 memset(&cp, 0, sizeof(cp));
1597 cp.handle = handle;
1598 cp.reason = reason;
1599
1600 return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG,
1601 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1602}
1603
1604static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1605{
1606 struct {
1607 struct hci_cp_le_set_ext_adv_data cp;
1608 u8 data[HCI_MAX_EXT_AD_LENGTH];
1609 } pdu;
1610 u8 len;
1611 struct adv_info *adv = NULL;
1612 int err;
1613
1614 memset(&pdu, 0, sizeof(pdu));
1615
1616 if (instance) {
1617 adv = hci_find_adv_instance(hdev, instance);
1618 if (!adv || !adv->adv_data_changed)
1619 return 0;
1620 }
1621
1622 len = eir_create_adv_data(hdev, instance, pdu.data);
1623
1624 pdu.cp.length = len;
1625 pdu.cp.handle = instance;
1626 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1627 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1628
1629 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1630 sizeof(pdu.cp) + len, &pdu.cp,
1631 HCI_CMD_TIMEOUT);
1632 if (err)
1633 return err;
1634
1635 /* Update data if the command succeed */
1636 if (adv) {
1637 adv->adv_data_changed = false;
1638 } else {
1639 memcpy(hdev->adv_data, pdu.data, len);
1640 hdev->adv_data_len = len;
1641 }
1642
1643 return 0;
1644}
1645
1646static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1647{
1648 struct hci_cp_le_set_adv_data cp;
1649 u8 len;
1650
1651 memset(&cp, 0, sizeof(cp));
1652
1653 len = eir_create_adv_data(hdev, instance, cp.data);
1654
1655 /* There's nothing to do if the data hasn't changed */
1656 if (hdev->adv_data_len == len &&
1657 memcmp(cp.data, hdev->adv_data, len) == 0)
1658 return 0;
1659
1660 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1661 hdev->adv_data_len = len;
1662
1663 cp.length = len;
1664
1665 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1666 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1667}
1668
1669int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1670{
1671 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1672 return 0;
1673
1674 if (ext_adv_capable(hdev))
1675 return hci_set_ext_adv_data_sync(hdev, instance);
1676
1677 return hci_set_adv_data_sync(hdev, instance);
1678}
1679
1680int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1681 bool force)
1682{
1683 struct adv_info *adv = NULL;
1684 u16 timeout;
1685
1686 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
1687 return -EPERM;
1688
1689 if (hdev->adv_instance_timeout)
1690 return -EBUSY;
1691
1692 adv = hci_find_adv_instance(hdev, instance);
1693 if (!adv)
1694 return -ENOENT;
1695
1696 /* A zero timeout means unlimited advertising. As long as there is
1697 * only one instance, duration should be ignored. We still set a timeout
1698 * in case further instances are being added later on.
1699 *
1700 * If the remaining lifetime of the instance is more than the duration
1701 * then the timeout corresponds to the duration, otherwise it will be
1702 * reduced to the remaining instance lifetime.
1703 */
1704 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
1705 timeout = adv->duration;
1706 else
1707 timeout = adv->remaining_time;
1708
1709 /* The remaining time is being reduced unless the instance is being
1710 * advertised without time limit.
1711 */
1712 if (adv->timeout)
1713 adv->remaining_time = adv->remaining_time - timeout;
1714
1715 /* Only use work for scheduling instances with legacy advertising */
1716 if (!ext_adv_capable(hdev)) {
1717 hdev->adv_instance_timeout = timeout;
1718 queue_delayed_work(hdev->req_workqueue,
1719 &hdev->adv_instance_expire,
1720 msecs_to_jiffies(timeout * 1000));
1721 }
1722
1723 /* If we're just re-scheduling the same instance again then do not
1724 * execute any HCI commands. This happens when a single instance is
1725 * being advertised.
1726 */
1727 if (!force && hdev->cur_adv_instance == instance &&
1728 hci_dev_test_flag(hdev, HCI_LE_ADV))
1729 return 0;
1730
1731 hdev->cur_adv_instance = instance;
1732
1733 return hci_start_adv_sync(hdev, instance);
1734}
1735
1736static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
1737{
1738 int err;
1739
1740 if (!ext_adv_capable(hdev))
1741 return 0;
1742
1743 /* Disable instance 0x00 to disable all instances */
1744 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1745 if (err)
1746 return err;
1747
1748 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
1749 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1750}
1751
1752static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
1753{
1754 struct adv_info *adv, *n;
1755 int err = 0;
1756
1757 if (ext_adv_capable(hdev))
1758 /* Remove all existing sets */
1759 err = hci_clear_adv_sets_sync(hdev, sk);
1760 if (ext_adv_capable(hdev))
1761 return err;
1762
1763 /* This is safe as long as there is no command send while the lock is
1764 * held.
1765 */
1766 hci_dev_lock(hdev);
1767
1768 /* Cleanup non-ext instances */
1769 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1770 u8 instance = adv->instance;
1771 int err;
1772
1773 if (!(force || adv->timeout))
1774 continue;
1775
1776 err = hci_remove_adv_instance(hdev, instance);
1777 if (!err)
1778 mgmt_advertising_removed(sk, hdev, instance);
1779 }
1780
1781 hci_dev_unlock(hdev);
1782
1783 return 0;
1784}
1785
1786static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
1787 struct sock *sk)
1788{
1789 int err = 0;
1790
1791 /* If we use extended advertising, instance has to be removed first. */
1792 if (ext_adv_capable(hdev))
1793 err = hci_remove_ext_adv_instance_sync(hdev, instance, sk);
1794 if (ext_adv_capable(hdev))
1795 return err;
1796
1797 /* This is safe as long as there is no command send while the lock is
1798 * held.
1799 */
1800 hci_dev_lock(hdev);
1801
1802 err = hci_remove_adv_instance(hdev, instance);
1803 if (!err)
1804 mgmt_advertising_removed(sk, hdev, instance);
1805
1806 hci_dev_unlock(hdev);
1807
1808 return err;
1809}
1810
1811/* For a single instance:
1812 * - force == true: The instance will be removed even when its remaining
1813 * lifetime is not zero.
1814 * - force == false: the instance will be deactivated but kept stored unless
1815 * the remaining lifetime is zero.
1816 *
1817 * For instance == 0x00:
1818 * - force == true: All instances will be removed regardless of their timeout
1819 * setting.
1820 * - force == false: Only instances that have a timeout will be removed.
1821 */
1822int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
1823 u8 instance, bool force)
1824{
1825 struct adv_info *next = NULL;
1826 int err;
1827
1828 /* Cancel any timeout concerning the removed instance(s). */
1829 if (!instance || hdev->cur_adv_instance == instance)
1830 cancel_adv_timeout(hdev);
1831
1832 /* Get the next instance to advertise BEFORE we remove
1833 * the current one. This can be the same instance again
1834 * if there is only one instance.
1835 */
1836 if (hdev->cur_adv_instance == instance)
1837 next = hci_get_next_instance(hdev, instance);
1838
1839 if (!instance) {
1840 err = hci_clear_adv_sync(hdev, sk, force);
1841 if (err)
1842 return err;
1843 } else {
1844 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1845
1846 if (force || (adv && adv->timeout && !adv->remaining_time)) {
1847 /* Don't advertise a removed instance. */
1848 if (next && next->instance == instance)
1849 next = NULL;
1850
1851 err = hci_remove_adv_sync(hdev, instance, sk);
1852 if (err)
1853 return err;
1854 }
1855 }
1856
1857 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
1858 return 0;
1859
1860 if (next && !ext_adv_capable(hdev))
1861 hci_schedule_adv_instance_sync(hdev, next->instance, false);
1862
1863 return 0;
1864}
1865
1866int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
1867{
1868 struct hci_cp_read_rssi cp;
1869
1870 cp.handle = handle;
1871 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
1872 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1873}
1874
1875int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
1876{
1877 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
1878 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
1879}
1880
1881int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
1882{
1883 struct hci_cp_read_tx_power cp;
1884
1885 cp.handle = handle;
1886 cp.type = type;
1887 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
1888 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1889}
1890
1891int hci_disable_advertising_sync(struct hci_dev *hdev)
1892{
1893 u8 enable = 0x00;
1894 int err = 0;
1895
1896 /* If controller is not advertising we are done. */
1897 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
1898 return 0;
1899
1900 if (ext_adv_capable(hdev))
1901 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1902 if (ext_adv_capable(hdev))
1903 return err;
1904
1905 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1906 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1907}
1908
1909static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
1910 u8 filter_dup)
1911{
1912 struct hci_cp_le_set_ext_scan_enable cp;
1913
1914 memset(&cp, 0, sizeof(cp));
1915 cp.enable = val;
1916
1917 if (hci_dev_test_flag(hdev, HCI_MESH))
1918 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
1919 else
1920 cp.filter_dup = filter_dup;
1921
1922 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
1923 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1924}
1925
1926static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
1927 u8 filter_dup)
1928{
1929 struct hci_cp_le_set_scan_enable cp;
1930
1931 if (use_ext_scan(hdev))
1932 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
1933
1934 memset(&cp, 0, sizeof(cp));
1935 cp.enable = val;
1936
1937 if (val && hci_dev_test_flag(hdev, HCI_MESH))
1938 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
1939 else
1940 cp.filter_dup = filter_dup;
1941
1942 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
1943 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1944}
1945
1946static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
1947{
1948 if (!use_ll_privacy(hdev))
1949 return 0;
1950
1951 /* If controller is not/already resolving we are done. */
1952 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
1953 return 0;
1954
1955 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
1956 sizeof(val), &val, HCI_CMD_TIMEOUT);
1957}
1958
1959static int hci_scan_disable_sync(struct hci_dev *hdev)
1960{
1961 int err;
1962
1963 /* If controller is not scanning we are done. */
1964 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
1965 return 0;
1966
1967 if (hdev->scanning_paused) {
1968 bt_dev_dbg(hdev, "Scanning is paused for suspend");
1969 return 0;
1970 }
1971
1972 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
1973 if (err) {
1974 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
1975 return err;
1976 }
1977
1978 return err;
1979}
1980
1981static bool scan_use_rpa(struct hci_dev *hdev)
1982{
1983 return hci_dev_test_flag(hdev, HCI_PRIVACY);
1984}
1985
1986static void hci_start_interleave_scan(struct hci_dev *hdev)
1987{
1988 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
1989 queue_delayed_work(hdev->req_workqueue,
1990 &hdev->interleave_scan, 0);
1991}
1992
1993static bool is_interleave_scanning(struct hci_dev *hdev)
1994{
1995 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
1996}
1997
1998static void cancel_interleave_scan(struct hci_dev *hdev)
1999{
2000 bt_dev_dbg(hdev, "cancelling interleave scan");
2001
2002 cancel_delayed_work_sync(&hdev->interleave_scan);
2003
2004 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
2005}
2006
2007/* Return true if interleave_scan wasn't started until exiting this function,
2008 * otherwise, return false
2009 */
2010static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
2011{
2012 /* Do interleaved scan only if all of the following are true:
2013 * - There is at least one ADV monitor
2014 * - At least one pending LE connection or one device to be scanned for
2015 * - Monitor offloading is not supported
2016 * If so, we should alternate between allowlist scan and one without
2017 * any filters to save power.
2018 */
2019 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
2020 !(list_empty(&hdev->pend_le_conns) &&
2021 list_empty(&hdev->pend_le_reports)) &&
2022 hci_get_adv_monitor_offload_ext(hdev) ==
2023 HCI_ADV_MONITOR_EXT_NONE;
2024 bool is_interleaving = is_interleave_scanning(hdev);
2025
2026 if (use_interleaving && !is_interleaving) {
2027 hci_start_interleave_scan(hdev);
2028 bt_dev_dbg(hdev, "starting interleave scan");
2029 return true;
2030 }
2031
2032 if (!use_interleaving && is_interleaving)
2033 cancel_interleave_scan(hdev);
2034
2035 return false;
2036}
2037
2038/* Removes connection to resolve list if needed.*/
2039static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
2040 bdaddr_t *bdaddr, u8 bdaddr_type)
2041{
2042 struct hci_cp_le_del_from_resolv_list cp;
2043 struct bdaddr_list_with_irk *entry;
2044
2045 if (!use_ll_privacy(hdev))
2046 return 0;
2047
2048 /* Check if the IRK has been programmed */
2049 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
2050 bdaddr_type);
2051 if (!entry)
2052 return 0;
2053
2054 cp.bdaddr_type = bdaddr_type;
2055 bacpy(&cp.bdaddr, bdaddr);
2056
2057 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
2058 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2059}
2060
2061static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
2062 bdaddr_t *bdaddr, u8 bdaddr_type)
2063{
2064 struct hci_cp_le_del_from_accept_list cp;
2065 int err;
2066
2067 /* Check if device is on accept list before removing it */
2068 if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
2069 return 0;
2070
2071 cp.bdaddr_type = bdaddr_type;
2072 bacpy(&cp.bdaddr, bdaddr);
2073
2074 /* Ignore errors when removing from resolving list as that is likely
2075 * that the device was never added.
2076 */
2077 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2078
2079 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
2080 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2081 if (err) {
2082 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
2083 return err;
2084 }
2085
2086 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
2087 cp.bdaddr_type);
2088
2089 return 0;
2090}
2091
2092struct conn_params {
2093 bdaddr_t addr;
2094 u8 addr_type;
2095 hci_conn_flags_t flags;
2096 u8 privacy_mode;
2097};
2098
2099/* Adds connection to resolve list if needed.
2100 * Setting params to NULL programs local hdev->irk
2101 */
2102static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
2103 struct conn_params *params)
2104{
2105 struct hci_cp_le_add_to_resolv_list cp;
2106 struct smp_irk *irk;
2107 struct bdaddr_list_with_irk *entry;
2108 struct hci_conn_params *p;
2109
2110 if (!use_ll_privacy(hdev))
2111 return 0;
2112
2113 /* Attempt to program local identity address, type and irk if params is
2114 * NULL.
2115 */
2116 if (!params) {
2117 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
2118 return 0;
2119
2120 hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
2121 memcpy(cp.peer_irk, hdev->irk, 16);
2122 goto done;
2123 }
2124
2125 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
2126 if (!irk)
2127 return 0;
2128
2129 /* Check if the IK has _not_ been programmed yet. */
2130 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
2131 ¶ms->addr,
2132 params->addr_type);
2133 if (entry)
2134 return 0;
2135
2136 cp.bdaddr_type = params->addr_type;
2137 bacpy(&cp.bdaddr, ¶ms->addr);
2138 memcpy(cp.peer_irk, irk->val, 16);
2139
2140 /* Default privacy mode is always Network */
2141 params->privacy_mode = HCI_NETWORK_PRIVACY;
2142
2143 rcu_read_lock();
2144 p = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2145 ¶ms->addr, params->addr_type);
2146 if (!p)
2147 p = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2148 ¶ms->addr, params->addr_type);
2149 if (p)
2150 WRITE_ONCE(p->privacy_mode, HCI_NETWORK_PRIVACY);
2151 rcu_read_unlock();
2152
2153done:
2154 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
2155 memcpy(cp.local_irk, hdev->irk, 16);
2156 else
2157 memset(cp.local_irk, 0, 16);
2158
2159 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
2160 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2161}
2162
2163/* Set Device Privacy Mode. */
2164static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
2165 struct conn_params *params)
2166{
2167 struct hci_cp_le_set_privacy_mode cp;
2168 struct smp_irk *irk;
2169
2170 /* If device privacy mode has already been set there is nothing to do */
2171 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
2172 return 0;
2173
2174 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
2175 * indicates that LL Privacy has been enabled and
2176 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
2177 */
2178 if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
2179 return 0;
2180
2181 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
2182 if (!irk)
2183 return 0;
2184
2185 memset(&cp, 0, sizeof(cp));
2186 cp.bdaddr_type = irk->addr_type;
2187 bacpy(&cp.bdaddr, &irk->bdaddr);
2188 cp.mode = HCI_DEVICE_PRIVACY;
2189
2190 /* Note: params->privacy_mode is not updated since it is a copy */
2191
2192 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
2193 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2194}
2195
2196/* Adds connection to allow list if needed, if the device uses RPA (has IRK)
2197 * this attempts to program the device in the resolving list as well and
2198 * properly set the privacy mode.
2199 */
2200static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
2201 struct conn_params *params,
2202 u8 *num_entries)
2203{
2204 struct hci_cp_le_add_to_accept_list cp;
2205 int err;
2206
2207 /* During suspend, only wakeable devices can be in acceptlist */
2208 if (hdev->suspended &&
2209 !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) {
2210 hci_le_del_accept_list_sync(hdev, ¶ms->addr,
2211 params->addr_type);
2212 return 0;
2213 }
2214
2215 /* Select filter policy to accept all advertising */
2216 if (*num_entries >= hdev->le_accept_list_size)
2217 return -ENOSPC;
2218
2219 /* Accept list can not be used with RPAs */
2220 if (!use_ll_privacy(hdev) &&
2221 hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type))
2222 return -EINVAL;
2223
2224 /* Attempt to program the device in the resolving list first to avoid
2225 * having to rollback in case it fails since the resolving list is
2226 * dynamic it can probably be smaller than the accept list.
2227 */
2228 err = hci_le_add_resolve_list_sync(hdev, params);
2229 if (err) {
2230 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
2231 return err;
2232 }
2233
2234 /* Set Privacy Mode */
2235 err = hci_le_set_privacy_mode_sync(hdev, params);
2236 if (err) {
2237 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
2238 return err;
2239 }
2240
2241 /* Check if already in accept list */
2242 if (hci_bdaddr_list_lookup(&hdev->le_accept_list, ¶ms->addr,
2243 params->addr_type))
2244 return 0;
2245
2246 *num_entries += 1;
2247 cp.bdaddr_type = params->addr_type;
2248 bacpy(&cp.bdaddr, ¶ms->addr);
2249
2250 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
2251 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2252 if (err) {
2253 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
2254 /* Rollback the device from the resolving list */
2255 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2256 return err;
2257 }
2258
2259 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
2260 cp.bdaddr_type);
2261
2262 return 0;
2263}
2264
2265/* This function disables/pause all advertising instances */
2266static int hci_pause_advertising_sync(struct hci_dev *hdev)
2267{
2268 int err;
2269 int old_state;
2270
2271 /* If already been paused there is nothing to do. */
2272 if (hdev->advertising_paused)
2273 return 0;
2274
2275 bt_dev_dbg(hdev, "Pausing directed advertising");
2276
2277 /* Stop directed advertising */
2278 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
2279 if (old_state) {
2280 /* When discoverable timeout triggers, then just make sure
2281 * the limited discoverable flag is cleared. Even in the case
2282 * of a timeout triggered from general discoverable, it is
2283 * safe to unconditionally clear the flag.
2284 */
2285 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
2286 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
2287 hdev->discov_timeout = 0;
2288 }
2289
2290 bt_dev_dbg(hdev, "Pausing advertising instances");
2291
2292 /* Call to disable any advertisements active on the controller.
2293 * This will succeed even if no advertisements are configured.
2294 */
2295 err = hci_disable_advertising_sync(hdev);
2296 if (err)
2297 return err;
2298
2299 /* If we are using software rotation, pause the loop */
2300 if (!ext_adv_capable(hdev))
2301 cancel_adv_timeout(hdev);
2302
2303 hdev->advertising_paused = true;
2304 hdev->advertising_old_state = old_state;
2305
2306 return 0;
2307}
2308
2309/* This function enables all user advertising instances */
2310static int hci_resume_advertising_sync(struct hci_dev *hdev)
2311{
2312 struct adv_info *adv, *tmp;
2313 int err;
2314
2315 /* If advertising has not been paused there is nothing to do. */
2316 if (!hdev->advertising_paused)
2317 return 0;
2318
2319 /* Resume directed advertising */
2320 hdev->advertising_paused = false;
2321 if (hdev->advertising_old_state) {
2322 hci_dev_set_flag(hdev, HCI_ADVERTISING);
2323 hdev->advertising_old_state = 0;
2324 }
2325
2326 bt_dev_dbg(hdev, "Resuming advertising instances");
2327
2328 if (ext_adv_capable(hdev)) {
2329 /* Call for each tracked instance to be re-enabled */
2330 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
2331 err = hci_enable_ext_advertising_sync(hdev,
2332 adv->instance);
2333 if (!err)
2334 continue;
2335
2336 /* If the instance cannot be resumed remove it */
2337 hci_remove_ext_adv_instance_sync(hdev, adv->instance,
2338 NULL);
2339 }
2340 } else {
2341 /* Schedule for most recent instance to be restarted and begin
2342 * the software rotation loop
2343 */
2344 err = hci_schedule_adv_instance_sync(hdev,
2345 hdev->cur_adv_instance,
2346 true);
2347 }
2348
2349 hdev->advertising_paused = false;
2350
2351 return err;
2352}
2353
2354static int hci_pause_addr_resolution(struct hci_dev *hdev)
2355{
2356 int err;
2357
2358 if (!use_ll_privacy(hdev))
2359 return 0;
2360
2361 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2362 return 0;
2363
2364 /* Cannot disable addr resolution if scanning is enabled or
2365 * when initiating an LE connection.
2366 */
2367 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2368 hci_lookup_le_connect(hdev)) {
2369 bt_dev_err(hdev, "Command not allowed when scan/LE connect");
2370 return -EPERM;
2371 }
2372
2373 /* Cannot disable addr resolution if advertising is enabled. */
2374 err = hci_pause_advertising_sync(hdev);
2375 if (err) {
2376 bt_dev_err(hdev, "Pause advertising failed: %d", err);
2377 return err;
2378 }
2379
2380 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2381 if (err)
2382 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
2383 err);
2384
2385 /* Return if address resolution is disabled and RPA is not used. */
2386 if (!err && scan_use_rpa(hdev))
2387 return 0;
2388
2389 hci_resume_advertising_sync(hdev);
2390 return err;
2391}
2392
2393struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
2394 bool extended, struct sock *sk)
2395{
2396 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
2397 HCI_OP_READ_LOCAL_OOB_DATA;
2398
2399 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
2400}
2401
2402static struct conn_params *conn_params_copy(struct list_head *list, size_t *n)
2403{
2404 struct hci_conn_params *params;
2405 struct conn_params *p;
2406 size_t i;
2407
2408 rcu_read_lock();
2409
2410 i = 0;
2411 list_for_each_entry_rcu(params, list, action)
2412 ++i;
2413 *n = i;
2414
2415 rcu_read_unlock();
2416
2417 p = kvcalloc(*n, sizeof(struct conn_params), GFP_KERNEL);
2418 if (!p)
2419 return NULL;
2420
2421 rcu_read_lock();
2422
2423 i = 0;
2424 list_for_each_entry_rcu(params, list, action) {
2425 /* Racing adds are handled in next scan update */
2426 if (i >= *n)
2427 break;
2428
2429 /* No hdev->lock, but: addr, addr_type are immutable.
2430 * privacy_mode is only written by us or in
2431 * hci_cc_le_set_privacy_mode that we wait for.
2432 * We should be idempotent so MGMT updating flags
2433 * while we are processing is OK.
2434 */
2435 bacpy(&p[i].addr, ¶ms->addr);
2436 p[i].addr_type = params->addr_type;
2437 p[i].flags = READ_ONCE(params->flags);
2438 p[i].privacy_mode = READ_ONCE(params->privacy_mode);
2439 ++i;
2440 }
2441
2442 rcu_read_unlock();
2443
2444 *n = i;
2445 return p;
2446}
2447
2448/* Device must not be scanning when updating the accept list.
2449 *
2450 * Update is done using the following sequence:
2451 *
2452 * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
2453 * Remove Devices From Accept List ->
2454 * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
2455 * Add Devices to Accept List ->
2456 * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
2457 * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
2458 * Enable Scanning
2459 *
2460 * In case of failure advertising shall be restored to its original state and
2461 * return would disable accept list since either accept or resolving list could
2462 * not be programmed.
2463 *
2464 */
2465static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
2466{
2467 struct conn_params *params;
2468 struct bdaddr_list *b, *t;
2469 u8 num_entries = 0;
2470 bool pend_conn, pend_report;
2471 u8 filter_policy;
2472 size_t i, n;
2473 int err;
2474
2475 /* Pause advertising if resolving list can be used as controllers
2476 * cannot accept resolving list modifications while advertising.
2477 */
2478 if (use_ll_privacy(hdev)) {
2479 err = hci_pause_advertising_sync(hdev);
2480 if (err) {
2481 bt_dev_err(hdev, "pause advertising failed: %d", err);
2482 return 0x00;
2483 }
2484 }
2485
2486 /* Disable address resolution while reprogramming accept list since
2487 * devices that do have an IRK will be programmed in the resolving list
2488 * when LL Privacy is enabled.
2489 */
2490 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2491 if (err) {
2492 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
2493 goto done;
2494 }
2495
2496 /* Go through the current accept list programmed into the
2497 * controller one by one and check if that address is connected or is
2498 * still in the list of pending connections or list of devices to
2499 * report. If not present in either list, then remove it from
2500 * the controller.
2501 */
2502 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
2503 if (hci_conn_hash_lookup_le(hdev, &b->bdaddr, b->bdaddr_type))
2504 continue;
2505
2506 /* Pointers not dereferenced, no locks needed */
2507 pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2508 &b->bdaddr,
2509 b->bdaddr_type);
2510 pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2511 &b->bdaddr,
2512 b->bdaddr_type);
2513
2514 /* If the device is not likely to connect or report,
2515 * remove it from the acceptlist.
2516 */
2517 if (!pend_conn && !pend_report) {
2518 hci_le_del_accept_list_sync(hdev, &b->bdaddr,
2519 b->bdaddr_type);
2520 continue;
2521 }
2522
2523 num_entries++;
2524 }
2525
2526 /* Since all no longer valid accept list entries have been
2527 * removed, walk through the list of pending connections
2528 * and ensure that any new device gets programmed into
2529 * the controller.
2530 *
2531 * If the list of the devices is larger than the list of
2532 * available accept list entries in the controller, then
2533 * just abort and return filer policy value to not use the
2534 * accept list.
2535 *
2536 * The list and params may be mutated while we wait for events,
2537 * so make a copy and iterate it.
2538 */
2539
2540 params = conn_params_copy(&hdev->pend_le_conns, &n);
2541 if (!params) {
2542 err = -ENOMEM;
2543 goto done;
2544 }
2545
2546 for (i = 0; i < n; ++i) {
2547 err = hci_le_add_accept_list_sync(hdev, ¶ms[i],
2548 &num_entries);
2549 if (err) {
2550 kvfree(params);
2551 goto done;
2552 }
2553 }
2554
2555 kvfree(params);
2556
2557 /* After adding all new pending connections, walk through
2558 * the list of pending reports and also add these to the
2559 * accept list if there is still space. Abort if space runs out.
2560 */
2561
2562 params = conn_params_copy(&hdev->pend_le_reports, &n);
2563 if (!params) {
2564 err = -ENOMEM;
2565 goto done;
2566 }
2567
2568 for (i = 0; i < n; ++i) {
2569 err = hci_le_add_accept_list_sync(hdev, ¶ms[i],
2570 &num_entries);
2571 if (err) {
2572 kvfree(params);
2573 goto done;
2574 }
2575 }
2576
2577 kvfree(params);
2578
2579 /* Use the allowlist unless the following conditions are all true:
2580 * - We are not currently suspending
2581 * - There are 1 or more ADV monitors registered and it's not offloaded
2582 * - Interleaved scanning is not currently using the allowlist
2583 */
2584 if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
2585 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
2586 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
2587 err = -EINVAL;
2588
2589done:
2590 filter_policy = err ? 0x00 : 0x01;
2591
2592 /* Enable address resolution when LL Privacy is enabled. */
2593 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2594 if (err)
2595 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
2596
2597 /* Resume advertising if it was paused */
2598 if (use_ll_privacy(hdev))
2599 hci_resume_advertising_sync(hdev);
2600
2601 /* Select filter policy to use accept list */
2602 return filter_policy;
2603}
2604
2605static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
2606 u16 interval, u16 window,
2607 u8 own_addr_type, u8 filter_policy)
2608{
2609 struct hci_cp_le_set_ext_scan_params *cp;
2610 struct hci_cp_le_scan_phy_params *phy;
2611 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
2612 u8 num_phy = 0;
2613
2614 cp = (void *)data;
2615 phy = (void *)cp->data;
2616
2617 memset(data, 0, sizeof(data));
2618
2619 cp->own_addr_type = own_addr_type;
2620 cp->filter_policy = filter_policy;
2621
2622 if (scan_1m(hdev) || scan_2m(hdev)) {
2623 cp->scanning_phys |= LE_SCAN_PHY_1M;
2624
2625 phy->type = type;
2626 phy->interval = cpu_to_le16(interval);
2627 phy->window = cpu_to_le16(window);
2628
2629 num_phy++;
2630 phy++;
2631 }
2632
2633 if (scan_coded(hdev)) {
2634 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2635
2636 phy->type = type;
2637 phy->interval = cpu_to_le16(interval);
2638 phy->window = cpu_to_le16(window);
2639
2640 num_phy++;
2641 phy++;
2642 }
2643
2644 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
2645 sizeof(*cp) + sizeof(*phy) * num_phy,
2646 data, HCI_CMD_TIMEOUT);
2647}
2648
2649static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
2650 u16 interval, u16 window,
2651 u8 own_addr_type, u8 filter_policy)
2652{
2653 struct hci_cp_le_set_scan_param cp;
2654
2655 if (use_ext_scan(hdev))
2656 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
2657 window, own_addr_type,
2658 filter_policy);
2659
2660 memset(&cp, 0, sizeof(cp));
2661 cp.type = type;
2662 cp.interval = cpu_to_le16(interval);
2663 cp.window = cpu_to_le16(window);
2664 cp.own_address_type = own_addr_type;
2665 cp.filter_policy = filter_policy;
2666
2667 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
2668 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2669}
2670
2671static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
2672 u16 window, u8 own_addr_type, u8 filter_policy,
2673 u8 filter_dup)
2674{
2675 int err;
2676
2677 if (hdev->scanning_paused) {
2678 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2679 return 0;
2680 }
2681
2682 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
2683 own_addr_type, filter_policy);
2684 if (err)
2685 return err;
2686
2687 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
2688}
2689
2690static int hci_passive_scan_sync(struct hci_dev *hdev)
2691{
2692 u8 own_addr_type;
2693 u8 filter_policy;
2694 u16 window, interval;
2695 u8 filter_dups = LE_SCAN_FILTER_DUP_ENABLE;
2696 int err;
2697
2698 if (hdev->scanning_paused) {
2699 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2700 return 0;
2701 }
2702
2703 err = hci_scan_disable_sync(hdev);
2704 if (err) {
2705 bt_dev_err(hdev, "disable scanning failed: %d", err);
2706 return err;
2707 }
2708
2709 /* Set require_privacy to false since no SCAN_REQ are send
2710 * during passive scanning. Not using an non-resolvable address
2711 * here is important so that peer devices using direct
2712 * advertising with our address will be correctly reported
2713 * by the controller.
2714 */
2715 if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
2716 &own_addr_type))
2717 return 0;
2718
2719 if (hdev->enable_advmon_interleave_scan &&
2720 hci_update_interleaved_scan_sync(hdev))
2721 return 0;
2722
2723 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
2724
2725 /* Adding or removing entries from the accept list must
2726 * happen before enabling scanning. The controller does
2727 * not allow accept list modification while scanning.
2728 */
2729 filter_policy = hci_update_accept_list_sync(hdev);
2730
2731 /* When the controller is using random resolvable addresses and
2732 * with that having LE privacy enabled, then controllers with
2733 * Extended Scanner Filter Policies support can now enable support
2734 * for handling directed advertising.
2735 *
2736 * So instead of using filter polices 0x00 (no acceptlist)
2737 * and 0x01 (acceptlist enabled) use the new filter policies
2738 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
2739 */
2740 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
2741 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
2742 filter_policy |= 0x02;
2743
2744 if (hdev->suspended) {
2745 window = hdev->le_scan_window_suspend;
2746 interval = hdev->le_scan_int_suspend;
2747 } else if (hci_is_le_conn_scanning(hdev)) {
2748 window = hdev->le_scan_window_connect;
2749 interval = hdev->le_scan_int_connect;
2750 } else if (hci_is_adv_monitoring(hdev)) {
2751 window = hdev->le_scan_window_adv_monitor;
2752 interval = hdev->le_scan_int_adv_monitor;
2753 } else {
2754 window = hdev->le_scan_window;
2755 interval = hdev->le_scan_interval;
2756 }
2757
2758 /* Disable all filtering for Mesh */
2759 if (hci_dev_test_flag(hdev, HCI_MESH)) {
2760 filter_policy = 0;
2761 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
2762 }
2763
2764 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
2765
2766 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
2767 own_addr_type, filter_policy, filter_dups);
2768}
2769
2770/* This function controls the passive scanning based on hdev->pend_le_conns
2771 * list. If there are pending LE connection we start the background scanning,
2772 * otherwise we stop it in the following sequence:
2773 *
2774 * If there are devices to scan:
2775 *
2776 * Disable Scanning -> Update Accept List ->
2777 * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
2778 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
2779 * Enable Scanning
2780 *
2781 * Otherwise:
2782 *
2783 * Disable Scanning
2784 */
2785int hci_update_passive_scan_sync(struct hci_dev *hdev)
2786{
2787 int err;
2788
2789 if (!test_bit(HCI_UP, &hdev->flags) ||
2790 test_bit(HCI_INIT, &hdev->flags) ||
2791 hci_dev_test_flag(hdev, HCI_SETUP) ||
2792 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2793 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2794 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2795 return 0;
2796
2797 /* No point in doing scanning if LE support hasn't been enabled */
2798 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2799 return 0;
2800
2801 /* If discovery is active don't interfere with it */
2802 if (hdev->discovery.state != DISCOVERY_STOPPED)
2803 return 0;
2804
2805 /* Reset RSSI and UUID filters when starting background scanning
2806 * since these filters are meant for service discovery only.
2807 *
2808 * The Start Discovery and Start Service Discovery operations
2809 * ensure to set proper values for RSSI threshold and UUID
2810 * filter list. So it is safe to just reset them here.
2811 */
2812 hci_discovery_filter_clear(hdev);
2813
2814 bt_dev_dbg(hdev, "ADV monitoring is %s",
2815 hci_is_adv_monitoring(hdev) ? "on" : "off");
2816
2817 if (!hci_dev_test_flag(hdev, HCI_MESH) &&
2818 list_empty(&hdev->pend_le_conns) &&
2819 list_empty(&hdev->pend_le_reports) &&
2820 !hci_is_adv_monitoring(hdev) &&
2821 !hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2822 /* If there is no pending LE connections or devices
2823 * to be scanned for or no ADV monitors, we should stop the
2824 * background scanning.
2825 */
2826
2827 bt_dev_dbg(hdev, "stopping background scanning");
2828
2829 err = hci_scan_disable_sync(hdev);
2830 if (err)
2831 bt_dev_err(hdev, "stop background scanning failed: %d",
2832 err);
2833 } else {
2834 /* If there is at least one pending LE connection, we should
2835 * keep the background scan running.
2836 */
2837
2838 /* If controller is connecting, we should not start scanning
2839 * since some controllers are not able to scan and connect at
2840 * the same time.
2841 */
2842 if (hci_lookup_le_connect(hdev))
2843 return 0;
2844
2845 bt_dev_dbg(hdev, "start background scanning");
2846
2847 err = hci_passive_scan_sync(hdev);
2848 if (err)
2849 bt_dev_err(hdev, "start background scanning failed: %d",
2850 err);
2851 }
2852
2853 return err;
2854}
2855
2856static int update_scan_sync(struct hci_dev *hdev, void *data)
2857{
2858 return hci_update_scan_sync(hdev);
2859}
2860
2861int hci_update_scan(struct hci_dev *hdev)
2862{
2863 return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL);
2864}
2865
2866static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
2867{
2868 return hci_update_passive_scan_sync(hdev);
2869}
2870
2871int hci_update_passive_scan(struct hci_dev *hdev)
2872{
2873 /* Only queue if it would have any effect */
2874 if (!test_bit(HCI_UP, &hdev->flags) ||
2875 test_bit(HCI_INIT, &hdev->flags) ||
2876 hci_dev_test_flag(hdev, HCI_SETUP) ||
2877 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2878 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2879 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2880 return 0;
2881
2882 return hci_cmd_sync_queue(hdev, update_passive_scan_sync, NULL, NULL);
2883}
2884
2885int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
2886{
2887 int err;
2888
2889 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
2890 return 0;
2891
2892 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
2893 sizeof(val), &val, HCI_CMD_TIMEOUT);
2894
2895 if (!err) {
2896 if (val) {
2897 hdev->features[1][0] |= LMP_HOST_SC;
2898 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
2899 } else {
2900 hdev->features[1][0] &= ~LMP_HOST_SC;
2901 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
2902 }
2903 }
2904
2905 return err;
2906}
2907
2908int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
2909{
2910 int err;
2911
2912 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
2913 lmp_host_ssp_capable(hdev))
2914 return 0;
2915
2916 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
2917 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
2918 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2919 }
2920
2921 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
2922 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2923 if (err)
2924 return err;
2925
2926 return hci_write_sc_support_sync(hdev, 0x01);
2927}
2928
2929int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
2930{
2931 struct hci_cp_write_le_host_supported cp;
2932
2933 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
2934 !lmp_bredr_capable(hdev))
2935 return 0;
2936
2937 /* Check first if we already have the right host state
2938 * (host features set)
2939 */
2940 if (le == lmp_host_le_capable(hdev) &&
2941 simul == lmp_host_le_br_capable(hdev))
2942 return 0;
2943
2944 memset(&cp, 0, sizeof(cp));
2945
2946 cp.le = le;
2947 cp.simul = simul;
2948
2949 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
2950 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2951}
2952
2953static int hci_powered_update_adv_sync(struct hci_dev *hdev)
2954{
2955 struct adv_info *adv, *tmp;
2956 int err;
2957
2958 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2959 return 0;
2960
2961 /* If RPA Resolution has not been enable yet it means the
2962 * resolving list is empty and we should attempt to program the
2963 * local IRK in order to support using own_addr_type
2964 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
2965 */
2966 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
2967 hci_le_add_resolve_list_sync(hdev, NULL);
2968 hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2969 }
2970
2971 /* Make sure the controller has a good default for
2972 * advertising data. This also applies to the case
2973 * where BR/EDR was toggled during the AUTO_OFF phase.
2974 */
2975 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
2976 list_empty(&hdev->adv_instances)) {
2977 if (ext_adv_capable(hdev)) {
2978 err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
2979 if (!err)
2980 hci_update_scan_rsp_data_sync(hdev, 0x00);
2981 } else {
2982 err = hci_update_adv_data_sync(hdev, 0x00);
2983 if (!err)
2984 hci_update_scan_rsp_data_sync(hdev, 0x00);
2985 }
2986
2987 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
2988 hci_enable_advertising_sync(hdev);
2989 }
2990
2991 /* Call for each tracked instance to be scheduled */
2992 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
2993 hci_schedule_adv_instance_sync(hdev, adv->instance, true);
2994
2995 return 0;
2996}
2997
2998static int hci_write_auth_enable_sync(struct hci_dev *hdev)
2999{
3000 u8 link_sec;
3001
3002 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
3003 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
3004 return 0;
3005
3006 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
3007 sizeof(link_sec), &link_sec,
3008 HCI_CMD_TIMEOUT);
3009}
3010
3011int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
3012{
3013 struct hci_cp_write_page_scan_activity cp;
3014 u8 type;
3015 int err = 0;
3016
3017 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3018 return 0;
3019
3020 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3021 return 0;
3022
3023 memset(&cp, 0, sizeof(cp));
3024
3025 if (enable) {
3026 type = PAGE_SCAN_TYPE_INTERLACED;
3027
3028 /* 160 msec page scan interval */
3029 cp.interval = cpu_to_le16(0x0100);
3030 } else {
3031 type = hdev->def_page_scan_type;
3032 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
3033 }
3034
3035 cp.window = cpu_to_le16(hdev->def_page_scan_window);
3036
3037 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
3038 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
3039 err = __hci_cmd_sync_status(hdev,
3040 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
3041 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3042 if (err)
3043 return err;
3044 }
3045
3046 if (hdev->page_scan_type != type)
3047 err = __hci_cmd_sync_status(hdev,
3048 HCI_OP_WRITE_PAGE_SCAN_TYPE,
3049 sizeof(type), &type,
3050 HCI_CMD_TIMEOUT);
3051
3052 return err;
3053}
3054
3055static bool disconnected_accept_list_entries(struct hci_dev *hdev)
3056{
3057 struct bdaddr_list *b;
3058
3059 list_for_each_entry(b, &hdev->accept_list, list) {
3060 struct hci_conn *conn;
3061
3062 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
3063 if (!conn)
3064 return true;
3065
3066 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3067 return true;
3068 }
3069
3070 return false;
3071}
3072
3073static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
3074{
3075 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
3076 sizeof(val), &val,
3077 HCI_CMD_TIMEOUT);
3078}
3079
3080int hci_update_scan_sync(struct hci_dev *hdev)
3081{
3082 u8 scan;
3083
3084 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3085 return 0;
3086
3087 if (!hdev_is_powered(hdev))
3088 return 0;
3089
3090 if (mgmt_powering_down(hdev))
3091 return 0;
3092
3093 if (hdev->scanning_paused)
3094 return 0;
3095
3096 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
3097 disconnected_accept_list_entries(hdev))
3098 scan = SCAN_PAGE;
3099 else
3100 scan = SCAN_DISABLED;
3101
3102 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
3103 scan |= SCAN_INQUIRY;
3104
3105 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
3106 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
3107 return 0;
3108
3109 return hci_write_scan_enable_sync(hdev, scan);
3110}
3111
3112int hci_update_name_sync(struct hci_dev *hdev)
3113{
3114 struct hci_cp_write_local_name cp;
3115
3116 memset(&cp, 0, sizeof(cp));
3117
3118 memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
3119
3120 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
3121 sizeof(cp), &cp,
3122 HCI_CMD_TIMEOUT);
3123}
3124
3125/* This function perform powered update HCI command sequence after the HCI init
3126 * sequence which end up resetting all states, the sequence is as follows:
3127 *
3128 * HCI_SSP_ENABLED(Enable SSP)
3129 * HCI_LE_ENABLED(Enable LE)
3130 * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
3131 * Update adv data)
3132 * Enable Authentication
3133 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
3134 * Set Name -> Set EIR)
3135 * HCI_FORCE_STATIC_ADDR | BDADDR_ANY && !HCI_BREDR_ENABLED (Set Static Address)
3136 */
3137int hci_powered_update_sync(struct hci_dev *hdev)
3138{
3139 int err;
3140
3141 /* Register the available SMP channels (BR/EDR and LE) only when
3142 * successfully powering on the controller. This late
3143 * registration is required so that LE SMP can clearly decide if
3144 * the public address or static address is used.
3145 */
3146 smp_register(hdev);
3147
3148 err = hci_write_ssp_mode_sync(hdev, 0x01);
3149 if (err)
3150 return err;
3151
3152 err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
3153 if (err)
3154 return err;
3155
3156 err = hci_powered_update_adv_sync(hdev);
3157 if (err)
3158 return err;
3159
3160 err = hci_write_auth_enable_sync(hdev);
3161 if (err)
3162 return err;
3163
3164 if (lmp_bredr_capable(hdev)) {
3165 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
3166 hci_write_fast_connectable_sync(hdev, true);
3167 else
3168 hci_write_fast_connectable_sync(hdev, false);
3169 hci_update_scan_sync(hdev);
3170 hci_update_class_sync(hdev);
3171 hci_update_name_sync(hdev);
3172 hci_update_eir_sync(hdev);
3173 }
3174
3175 /* If forcing static address is in use or there is no public
3176 * address use the static address as random address (but skip
3177 * the HCI command if the current random address is already the
3178 * static one.
3179 *
3180 * In case BR/EDR has been disabled on a dual-mode controller
3181 * and a static address has been configured, then use that
3182 * address instead of the public BR/EDR address.
3183 */
3184 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3185 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3186 !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))) {
3187 if (bacmp(&hdev->static_addr, BDADDR_ANY))
3188 return hci_set_random_addr_sync(hdev,
3189 &hdev->static_addr);
3190 }
3191
3192 return 0;
3193}
3194
3195/**
3196 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
3197 * (BD_ADDR) for a HCI device from
3198 * a firmware node property.
3199 * @hdev: The HCI device
3200 *
3201 * Search the firmware node for 'local-bd-address'.
3202 *
3203 * All-zero BD addresses are rejected, because those could be properties
3204 * that exist in the firmware tables, but were not updated by the firmware. For
3205 * example, the DTS could define 'local-bd-address', with zero BD addresses.
3206 */
3207static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
3208{
3209 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
3210 bdaddr_t ba;
3211 int ret;
3212
3213 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
3214 (u8 *)&ba, sizeof(ba));
3215 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
3216 return;
3217
3218 bacpy(&hdev->public_addr, &ba);
3219}
3220
3221struct hci_init_stage {
3222 int (*func)(struct hci_dev *hdev);
3223};
3224
3225/* Run init stage NULL terminated function table */
3226static int hci_init_stage_sync(struct hci_dev *hdev,
3227 const struct hci_init_stage *stage)
3228{
3229 size_t i;
3230
3231 for (i = 0; stage[i].func; i++) {
3232 int err;
3233
3234 err = stage[i].func(hdev);
3235 if (err)
3236 return err;
3237 }
3238
3239 return 0;
3240}
3241
3242/* Read Local Version */
3243static int hci_read_local_version_sync(struct hci_dev *hdev)
3244{
3245 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
3246 0, NULL, HCI_CMD_TIMEOUT);
3247}
3248
3249/* Read BD Address */
3250static int hci_read_bd_addr_sync(struct hci_dev *hdev)
3251{
3252 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
3253 0, NULL, HCI_CMD_TIMEOUT);
3254}
3255
3256#define HCI_INIT(_func) \
3257{ \
3258 .func = _func, \
3259}
3260
3261static const struct hci_init_stage hci_init0[] = {
3262 /* HCI_OP_READ_LOCAL_VERSION */
3263 HCI_INIT(hci_read_local_version_sync),
3264 /* HCI_OP_READ_BD_ADDR */
3265 HCI_INIT(hci_read_bd_addr_sync),
3266 {}
3267};
3268
3269int hci_reset_sync(struct hci_dev *hdev)
3270{
3271 int err;
3272
3273 set_bit(HCI_RESET, &hdev->flags);
3274
3275 err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
3276 HCI_CMD_TIMEOUT);
3277 if (err)
3278 return err;
3279
3280 return 0;
3281}
3282
3283static int hci_init0_sync(struct hci_dev *hdev)
3284{
3285 int err;
3286
3287 bt_dev_dbg(hdev, "");
3288
3289 /* Reset */
3290 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3291 err = hci_reset_sync(hdev);
3292 if (err)
3293 return err;
3294 }
3295
3296 return hci_init_stage_sync(hdev, hci_init0);
3297}
3298
3299static int hci_unconf_init_sync(struct hci_dev *hdev)
3300{
3301 int err;
3302
3303 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3304 return 0;
3305
3306 err = hci_init0_sync(hdev);
3307 if (err < 0)
3308 return err;
3309
3310 if (hci_dev_test_flag(hdev, HCI_SETUP))
3311 hci_debugfs_create_basic(hdev);
3312
3313 return 0;
3314}
3315
3316/* Read Local Supported Features. */
3317static int hci_read_local_features_sync(struct hci_dev *hdev)
3318{
3319 /* Not all AMP controllers support this command */
3320 if (hdev->dev_type == HCI_AMP && !(hdev->commands[14] & 0x20))
3321 return 0;
3322
3323 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
3324 0, NULL, HCI_CMD_TIMEOUT);
3325}
3326
3327/* BR Controller init stage 1 command sequence */
3328static const struct hci_init_stage br_init1[] = {
3329 /* HCI_OP_READ_LOCAL_FEATURES */
3330 HCI_INIT(hci_read_local_features_sync),
3331 /* HCI_OP_READ_LOCAL_VERSION */
3332 HCI_INIT(hci_read_local_version_sync),
3333 /* HCI_OP_READ_BD_ADDR */
3334 HCI_INIT(hci_read_bd_addr_sync),
3335 {}
3336};
3337
3338/* Read Local Commands */
3339static int hci_read_local_cmds_sync(struct hci_dev *hdev)
3340{
3341 /* All Bluetooth 1.2 and later controllers should support the
3342 * HCI command for reading the local supported commands.
3343 *
3344 * Unfortunately some controllers indicate Bluetooth 1.2 support,
3345 * but do not have support for this command. If that is the case,
3346 * the driver can quirk the behavior and skip reading the local
3347 * supported commands.
3348 */
3349 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
3350 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
3351 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
3352 0, NULL, HCI_CMD_TIMEOUT);
3353
3354 return 0;
3355}
3356
3357/* Read Local AMP Info */
3358static int hci_read_local_amp_info_sync(struct hci_dev *hdev)
3359{
3360 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_AMP_INFO,
3361 0, NULL, HCI_CMD_TIMEOUT);
3362}
3363
3364/* Read Data Blk size */
3365static int hci_read_data_block_size_sync(struct hci_dev *hdev)
3366{
3367 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DATA_BLOCK_SIZE,
3368 0, NULL, HCI_CMD_TIMEOUT);
3369}
3370
3371/* Read Flow Control Mode */
3372static int hci_read_flow_control_mode_sync(struct hci_dev *hdev)
3373{
3374 return __hci_cmd_sync_status(hdev, HCI_OP_READ_FLOW_CONTROL_MODE,
3375 0, NULL, HCI_CMD_TIMEOUT);
3376}
3377
3378/* Read Location Data */
3379static int hci_read_location_data_sync(struct hci_dev *hdev)
3380{
3381 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCATION_DATA,
3382 0, NULL, HCI_CMD_TIMEOUT);
3383}
3384
3385/* AMP Controller init stage 1 command sequence */
3386static const struct hci_init_stage amp_init1[] = {
3387 /* HCI_OP_READ_LOCAL_VERSION */
3388 HCI_INIT(hci_read_local_version_sync),
3389 /* HCI_OP_READ_LOCAL_COMMANDS */
3390 HCI_INIT(hci_read_local_cmds_sync),
3391 /* HCI_OP_READ_LOCAL_AMP_INFO */
3392 HCI_INIT(hci_read_local_amp_info_sync),
3393 /* HCI_OP_READ_DATA_BLOCK_SIZE */
3394 HCI_INIT(hci_read_data_block_size_sync),
3395 /* HCI_OP_READ_FLOW_CONTROL_MODE */
3396 HCI_INIT(hci_read_flow_control_mode_sync),
3397 /* HCI_OP_READ_LOCATION_DATA */
3398 HCI_INIT(hci_read_location_data_sync),
3399 {}
3400};
3401
3402static int hci_init1_sync(struct hci_dev *hdev)
3403{
3404 int err;
3405
3406 bt_dev_dbg(hdev, "");
3407
3408 /* Reset */
3409 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3410 err = hci_reset_sync(hdev);
3411 if (err)
3412 return err;
3413 }
3414
3415 switch (hdev->dev_type) {
3416 case HCI_PRIMARY:
3417 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
3418 return hci_init_stage_sync(hdev, br_init1);
3419 case HCI_AMP:
3420 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
3421 return hci_init_stage_sync(hdev, amp_init1);
3422 default:
3423 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
3424 break;
3425 }
3426
3427 return 0;
3428}
3429
3430/* AMP Controller init stage 2 command sequence */
3431static const struct hci_init_stage amp_init2[] = {
3432 /* HCI_OP_READ_LOCAL_FEATURES */
3433 HCI_INIT(hci_read_local_features_sync),
3434 {}
3435};
3436
3437/* Read Buffer Size (ACL mtu, max pkt, etc.) */
3438static int hci_read_buffer_size_sync(struct hci_dev *hdev)
3439{
3440 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
3441 0, NULL, HCI_CMD_TIMEOUT);
3442}
3443
3444/* Read Class of Device */
3445static int hci_read_dev_class_sync(struct hci_dev *hdev)
3446{
3447 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
3448 0, NULL, HCI_CMD_TIMEOUT);
3449}
3450
3451/* Read Local Name */
3452static int hci_read_local_name_sync(struct hci_dev *hdev)
3453{
3454 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
3455 0, NULL, HCI_CMD_TIMEOUT);
3456}
3457
3458/* Read Voice Setting */
3459static int hci_read_voice_setting_sync(struct hci_dev *hdev)
3460{
3461 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
3462 0, NULL, HCI_CMD_TIMEOUT);
3463}
3464
3465/* Read Number of Supported IAC */
3466static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
3467{
3468 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
3469 0, NULL, HCI_CMD_TIMEOUT);
3470}
3471
3472/* Read Current IAC LAP */
3473static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
3474{
3475 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
3476 0, NULL, HCI_CMD_TIMEOUT);
3477}
3478
3479static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
3480 u8 cond_type, bdaddr_t *bdaddr,
3481 u8 auto_accept)
3482{
3483 struct hci_cp_set_event_filter cp;
3484
3485 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3486 return 0;
3487
3488 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3489 return 0;
3490
3491 memset(&cp, 0, sizeof(cp));
3492 cp.flt_type = flt_type;
3493
3494 if (flt_type != HCI_FLT_CLEAR_ALL) {
3495 cp.cond_type = cond_type;
3496 bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
3497 cp.addr_conn_flt.auto_accept = auto_accept;
3498 }
3499
3500 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
3501 flt_type == HCI_FLT_CLEAR_ALL ?
3502 sizeof(cp.flt_type) : sizeof(cp), &cp,
3503 HCI_CMD_TIMEOUT);
3504}
3505
3506static int hci_clear_event_filter_sync(struct hci_dev *hdev)
3507{
3508 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
3509 return 0;
3510
3511 /* In theory the state machine should not reach here unless
3512 * a hci_set_event_filter_sync() call succeeds, but we do
3513 * the check both for parity and as a future reminder.
3514 */
3515 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3516 return 0;
3517
3518 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
3519 BDADDR_ANY, 0x00);
3520}
3521
3522/* Connection accept timeout ~20 secs */
3523static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
3524{
3525 __le16 param = cpu_to_le16(0x7d00);
3526
3527 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
3528 sizeof(param), ¶m, HCI_CMD_TIMEOUT);
3529}
3530
3531/* BR Controller init stage 2 command sequence */
3532static const struct hci_init_stage br_init2[] = {
3533 /* HCI_OP_READ_BUFFER_SIZE */
3534 HCI_INIT(hci_read_buffer_size_sync),
3535 /* HCI_OP_READ_CLASS_OF_DEV */
3536 HCI_INIT(hci_read_dev_class_sync),
3537 /* HCI_OP_READ_LOCAL_NAME */
3538 HCI_INIT(hci_read_local_name_sync),
3539 /* HCI_OP_READ_VOICE_SETTING */
3540 HCI_INIT(hci_read_voice_setting_sync),
3541 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
3542 HCI_INIT(hci_read_num_supported_iac_sync),
3543 /* HCI_OP_READ_CURRENT_IAC_LAP */
3544 HCI_INIT(hci_read_current_iac_lap_sync),
3545 /* HCI_OP_SET_EVENT_FLT */
3546 HCI_INIT(hci_clear_event_filter_sync),
3547 /* HCI_OP_WRITE_CA_TIMEOUT */
3548 HCI_INIT(hci_write_ca_timeout_sync),
3549 {}
3550};
3551
3552static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
3553{
3554 u8 mode = 0x01;
3555
3556 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3557 return 0;
3558
3559 /* When SSP is available, then the host features page
3560 * should also be available as well. However some
3561 * controllers list the max_page as 0 as long as SSP
3562 * has not been enabled. To achieve proper debugging
3563 * output, force the minimum max_page to 1 at least.
3564 */
3565 hdev->max_page = 0x01;
3566
3567 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3568 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3569}
3570
3571static int hci_write_eir_sync(struct hci_dev *hdev)
3572{
3573 struct hci_cp_write_eir cp;
3574
3575 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3576 return 0;
3577
3578 memset(hdev->eir, 0, sizeof(hdev->eir));
3579 memset(&cp, 0, sizeof(cp));
3580
3581 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
3582 HCI_CMD_TIMEOUT);
3583}
3584
3585static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
3586{
3587 u8 mode;
3588
3589 if (!lmp_inq_rssi_capable(hdev) &&
3590 !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3591 return 0;
3592
3593 /* If Extended Inquiry Result events are supported, then
3594 * they are clearly preferred over Inquiry Result with RSSI
3595 * events.
3596 */
3597 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
3598
3599 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
3600 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3601}
3602
3603static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
3604{
3605 if (!lmp_inq_tx_pwr_capable(hdev))
3606 return 0;
3607
3608 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
3609 0, NULL, HCI_CMD_TIMEOUT);
3610}
3611
3612static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
3613{
3614 struct hci_cp_read_local_ext_features cp;
3615
3616 if (!lmp_ext_feat_capable(hdev))
3617 return 0;
3618
3619 memset(&cp, 0, sizeof(cp));
3620 cp.page = page;
3621
3622 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
3623 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3624}
3625
3626static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
3627{
3628 return hci_read_local_ext_features_sync(hdev, 0x01);
3629}
3630
3631/* HCI Controller init stage 2 command sequence */
3632static const struct hci_init_stage hci_init2[] = {
3633 /* HCI_OP_READ_LOCAL_COMMANDS */
3634 HCI_INIT(hci_read_local_cmds_sync),
3635 /* HCI_OP_WRITE_SSP_MODE */
3636 HCI_INIT(hci_write_ssp_mode_1_sync),
3637 /* HCI_OP_WRITE_EIR */
3638 HCI_INIT(hci_write_eir_sync),
3639 /* HCI_OP_WRITE_INQUIRY_MODE */
3640 HCI_INIT(hci_write_inquiry_mode_sync),
3641 /* HCI_OP_READ_INQ_RSP_TX_POWER */
3642 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
3643 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3644 HCI_INIT(hci_read_local_ext_features_1_sync),
3645 /* HCI_OP_WRITE_AUTH_ENABLE */
3646 HCI_INIT(hci_write_auth_enable_sync),
3647 {}
3648};
3649
3650/* Read LE Buffer Size */
3651static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
3652{
3653 /* Use Read LE Buffer Size V2 if supported */
3654 if (iso_capable(hdev) && hdev->commands[41] & 0x20)
3655 return __hci_cmd_sync_status(hdev,
3656 HCI_OP_LE_READ_BUFFER_SIZE_V2,
3657 0, NULL, HCI_CMD_TIMEOUT);
3658
3659 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
3660 0, NULL, HCI_CMD_TIMEOUT);
3661}
3662
3663/* Read LE Local Supported Features */
3664static int hci_le_read_local_features_sync(struct hci_dev *hdev)
3665{
3666 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
3667 0, NULL, HCI_CMD_TIMEOUT);
3668}
3669
3670/* Read LE Supported States */
3671static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
3672{
3673 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
3674 0, NULL, HCI_CMD_TIMEOUT);
3675}
3676
3677/* LE Controller init stage 2 command sequence */
3678static const struct hci_init_stage le_init2[] = {
3679 /* HCI_OP_LE_READ_LOCAL_FEATURES */
3680 HCI_INIT(hci_le_read_local_features_sync),
3681 /* HCI_OP_LE_READ_BUFFER_SIZE */
3682 HCI_INIT(hci_le_read_buffer_size_sync),
3683 /* HCI_OP_LE_READ_SUPPORTED_STATES */
3684 HCI_INIT(hci_le_read_supported_states_sync),
3685 {}
3686};
3687
3688static int hci_init2_sync(struct hci_dev *hdev)
3689{
3690 int err;
3691
3692 bt_dev_dbg(hdev, "");
3693
3694 if (hdev->dev_type == HCI_AMP)
3695 return hci_init_stage_sync(hdev, amp_init2);
3696
3697 err = hci_init_stage_sync(hdev, hci_init2);
3698 if (err)
3699 return err;
3700
3701 if (lmp_bredr_capable(hdev)) {
3702 err = hci_init_stage_sync(hdev, br_init2);
3703 if (err)
3704 return err;
3705 } else {
3706 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
3707 }
3708
3709 if (lmp_le_capable(hdev)) {
3710 err = hci_init_stage_sync(hdev, le_init2);
3711 if (err)
3712 return err;
3713 /* LE-only controllers have LE implicitly enabled */
3714 if (!lmp_bredr_capable(hdev))
3715 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
3716 }
3717
3718 return 0;
3719}
3720
3721static int hci_set_event_mask_sync(struct hci_dev *hdev)
3722{
3723 /* The second byte is 0xff instead of 0x9f (two reserved bits
3724 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
3725 * command otherwise.
3726 */
3727 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
3728
3729 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
3730 * any event mask for pre 1.2 devices.
3731 */
3732 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3733 return 0;
3734
3735 if (lmp_bredr_capable(hdev)) {
3736 events[4] |= 0x01; /* Flow Specification Complete */
3737
3738 /* Don't set Disconnect Complete and mode change when
3739 * suspended as that would wakeup the host when disconnecting
3740 * due to suspend.
3741 */
3742 if (hdev->suspended) {
3743 events[0] &= 0xef;
3744 events[2] &= 0xf7;
3745 }
3746 } else {
3747 /* Use a different default for LE-only devices */
3748 memset(events, 0, sizeof(events));
3749 events[1] |= 0x20; /* Command Complete */
3750 events[1] |= 0x40; /* Command Status */
3751 events[1] |= 0x80; /* Hardware Error */
3752
3753 /* If the controller supports the Disconnect command, enable
3754 * the corresponding event. In addition enable packet flow
3755 * control related events.
3756 */
3757 if (hdev->commands[0] & 0x20) {
3758 /* Don't set Disconnect Complete when suspended as that
3759 * would wakeup the host when disconnecting due to
3760 * suspend.
3761 */
3762 if (!hdev->suspended)
3763 events[0] |= 0x10; /* Disconnection Complete */
3764 events[2] |= 0x04; /* Number of Completed Packets */
3765 events[3] |= 0x02; /* Data Buffer Overflow */
3766 }
3767
3768 /* If the controller supports the Read Remote Version
3769 * Information command, enable the corresponding event.
3770 */
3771 if (hdev->commands[2] & 0x80)
3772 events[1] |= 0x08; /* Read Remote Version Information
3773 * Complete
3774 */
3775
3776 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
3777 events[0] |= 0x80; /* Encryption Change */
3778 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3779 }
3780 }
3781
3782 if (lmp_inq_rssi_capable(hdev) ||
3783 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3784 events[4] |= 0x02; /* Inquiry Result with RSSI */
3785
3786 if (lmp_ext_feat_capable(hdev))
3787 events[4] |= 0x04; /* Read Remote Extended Features Complete */
3788
3789 if (lmp_esco_capable(hdev)) {
3790 events[5] |= 0x08; /* Synchronous Connection Complete */
3791 events[5] |= 0x10; /* Synchronous Connection Changed */
3792 }
3793
3794 if (lmp_sniffsubr_capable(hdev))
3795 events[5] |= 0x20; /* Sniff Subrating */
3796
3797 if (lmp_pause_enc_capable(hdev))
3798 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3799
3800 if (lmp_ext_inq_capable(hdev))
3801 events[5] |= 0x40; /* Extended Inquiry Result */
3802
3803 if (lmp_no_flush_capable(hdev))
3804 events[7] |= 0x01; /* Enhanced Flush Complete */
3805
3806 if (lmp_lsto_capable(hdev))
3807 events[6] |= 0x80; /* Link Supervision Timeout Changed */
3808
3809 if (lmp_ssp_capable(hdev)) {
3810 events[6] |= 0x01; /* IO Capability Request */
3811 events[6] |= 0x02; /* IO Capability Response */
3812 events[6] |= 0x04; /* User Confirmation Request */
3813 events[6] |= 0x08; /* User Passkey Request */
3814 events[6] |= 0x10; /* Remote OOB Data Request */
3815 events[6] |= 0x20; /* Simple Pairing Complete */
3816 events[7] |= 0x04; /* User Passkey Notification */
3817 events[7] |= 0x08; /* Keypress Notification */
3818 events[7] |= 0x10; /* Remote Host Supported
3819 * Features Notification
3820 */
3821 }
3822
3823 if (lmp_le_capable(hdev))
3824 events[7] |= 0x20; /* LE Meta-Event */
3825
3826 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
3827 sizeof(events), events, HCI_CMD_TIMEOUT);
3828}
3829
3830static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
3831{
3832 struct hci_cp_read_stored_link_key cp;
3833
3834 if (!(hdev->commands[6] & 0x20) ||
3835 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
3836 return 0;
3837
3838 memset(&cp, 0, sizeof(cp));
3839 bacpy(&cp.bdaddr, BDADDR_ANY);
3840 cp.read_all = 0x01;
3841
3842 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
3843 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3844}
3845
3846static int hci_setup_link_policy_sync(struct hci_dev *hdev)
3847{
3848 struct hci_cp_write_def_link_policy cp;
3849 u16 link_policy = 0;
3850
3851 if (!(hdev->commands[5] & 0x10))
3852 return 0;
3853
3854 memset(&cp, 0, sizeof(cp));
3855
3856 if (lmp_rswitch_capable(hdev))
3857 link_policy |= HCI_LP_RSWITCH;
3858 if (lmp_hold_capable(hdev))
3859 link_policy |= HCI_LP_HOLD;
3860 if (lmp_sniff_capable(hdev))
3861 link_policy |= HCI_LP_SNIFF;
3862 if (lmp_park_capable(hdev))
3863 link_policy |= HCI_LP_PARK;
3864
3865 cp.policy = cpu_to_le16(link_policy);
3866
3867 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
3868 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3869}
3870
3871static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
3872{
3873 if (!(hdev->commands[8] & 0x01))
3874 return 0;
3875
3876 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
3877 0, NULL, HCI_CMD_TIMEOUT);
3878}
3879
3880static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
3881{
3882 if (!(hdev->commands[18] & 0x04) ||
3883 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
3884 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
3885 return 0;
3886
3887 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
3888 0, NULL, HCI_CMD_TIMEOUT);
3889}
3890
3891static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
3892{
3893 /* Some older Broadcom based Bluetooth 1.2 controllers do not
3894 * support the Read Page Scan Type command. Check support for
3895 * this command in the bit mask of supported commands.
3896 */
3897 if (!(hdev->commands[13] & 0x01))
3898 return 0;
3899
3900 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
3901 0, NULL, HCI_CMD_TIMEOUT);
3902}
3903
3904/* Read features beyond page 1 if available */
3905static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
3906{
3907 u8 page;
3908 int err;
3909
3910 if (!lmp_ext_feat_capable(hdev))
3911 return 0;
3912
3913 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
3914 page++) {
3915 err = hci_read_local_ext_features_sync(hdev, page);
3916 if (err)
3917 return err;
3918 }
3919
3920 return 0;
3921}
3922
3923/* HCI Controller init stage 3 command sequence */
3924static const struct hci_init_stage hci_init3[] = {
3925 /* HCI_OP_SET_EVENT_MASK */
3926 HCI_INIT(hci_set_event_mask_sync),
3927 /* HCI_OP_READ_STORED_LINK_KEY */
3928 HCI_INIT(hci_read_stored_link_key_sync),
3929 /* HCI_OP_WRITE_DEF_LINK_POLICY */
3930 HCI_INIT(hci_setup_link_policy_sync),
3931 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
3932 HCI_INIT(hci_read_page_scan_activity_sync),
3933 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
3934 HCI_INIT(hci_read_def_err_data_reporting_sync),
3935 /* HCI_OP_READ_PAGE_SCAN_TYPE */
3936 HCI_INIT(hci_read_page_scan_type_sync),
3937 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3938 HCI_INIT(hci_read_local_ext_features_all_sync),
3939 {}
3940};
3941
3942static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
3943{
3944 u8 events[8];
3945
3946 if (!lmp_le_capable(hdev))
3947 return 0;
3948
3949 memset(events, 0, sizeof(events));
3950
3951 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
3952 events[0] |= 0x10; /* LE Long Term Key Request */
3953
3954 /* If controller supports the Connection Parameters Request
3955 * Link Layer Procedure, enable the corresponding event.
3956 */
3957 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
3958 /* LE Remote Connection Parameter Request */
3959 events[0] |= 0x20;
3960
3961 /* If the controller supports the Data Length Extension
3962 * feature, enable the corresponding event.
3963 */
3964 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
3965 events[0] |= 0x40; /* LE Data Length Change */
3966
3967 /* If the controller supports LL Privacy feature or LE Extended Adv,
3968 * enable the corresponding event.
3969 */
3970 if (use_enhanced_conn_complete(hdev))
3971 events[1] |= 0x02; /* LE Enhanced Connection Complete */
3972
3973 /* If the controller supports Extended Scanner Filter
3974 * Policies, enable the corresponding event.
3975 */
3976 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
3977 events[1] |= 0x04; /* LE Direct Advertising Report */
3978
3979 /* If the controller supports Channel Selection Algorithm #2
3980 * feature, enable the corresponding event.
3981 */
3982 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
3983 events[2] |= 0x08; /* LE Channel Selection Algorithm */
3984
3985 /* If the controller supports the LE Set Scan Enable command,
3986 * enable the corresponding advertising report event.
3987 */
3988 if (hdev->commands[26] & 0x08)
3989 events[0] |= 0x02; /* LE Advertising Report */
3990
3991 /* If the controller supports the LE Create Connection
3992 * command, enable the corresponding event.
3993 */
3994 if (hdev->commands[26] & 0x10)
3995 events[0] |= 0x01; /* LE Connection Complete */
3996
3997 /* If the controller supports the LE Connection Update
3998 * command, enable the corresponding event.
3999 */
4000 if (hdev->commands[27] & 0x04)
4001 events[0] |= 0x04; /* LE Connection Update Complete */
4002
4003 /* If the controller supports the LE Read Remote Used Features
4004 * command, enable the corresponding event.
4005 */
4006 if (hdev->commands[27] & 0x20)
4007 /* LE Read Remote Used Features Complete */
4008 events[0] |= 0x08;
4009
4010 /* If the controller supports the LE Read Local P-256
4011 * Public Key command, enable the corresponding event.
4012 */
4013 if (hdev->commands[34] & 0x02)
4014 /* LE Read Local P-256 Public Key Complete */
4015 events[0] |= 0x80;
4016
4017 /* If the controller supports the LE Generate DHKey
4018 * command, enable the corresponding event.
4019 */
4020 if (hdev->commands[34] & 0x04)
4021 events[1] |= 0x01; /* LE Generate DHKey Complete */
4022
4023 /* If the controller supports the LE Set Default PHY or
4024 * LE Set PHY commands, enable the corresponding event.
4025 */
4026 if (hdev->commands[35] & (0x20 | 0x40))
4027 events[1] |= 0x08; /* LE PHY Update Complete */
4028
4029 /* If the controller supports LE Set Extended Scan Parameters
4030 * and LE Set Extended Scan Enable commands, enable the
4031 * corresponding event.
4032 */
4033 if (use_ext_scan(hdev))
4034 events[1] |= 0x10; /* LE Extended Advertising Report */
4035
4036 /* If the controller supports the LE Extended Advertising
4037 * command, enable the corresponding event.
4038 */
4039 if (ext_adv_capable(hdev))
4040 events[2] |= 0x02; /* LE Advertising Set Terminated */
4041
4042 if (cis_capable(hdev)) {
4043 events[3] |= 0x01; /* LE CIS Established */
4044 if (cis_peripheral_capable(hdev))
4045 events[3] |= 0x02; /* LE CIS Request */
4046 }
4047
4048 if (bis_capable(hdev)) {
4049 events[1] |= 0x20; /* LE PA Report */
4050 events[1] |= 0x40; /* LE PA Sync Established */
4051 events[3] |= 0x04; /* LE Create BIG Complete */
4052 events[3] |= 0x08; /* LE Terminate BIG Complete */
4053 events[3] |= 0x10; /* LE BIG Sync Established */
4054 events[3] |= 0x20; /* LE BIG Sync Loss */
4055 events[4] |= 0x02; /* LE BIG Info Advertising Report */
4056 }
4057
4058 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
4059 sizeof(events), events, HCI_CMD_TIMEOUT);
4060}
4061
4062/* Read LE Advertising Channel TX Power */
4063static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
4064{
4065 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
4066 /* HCI TS spec forbids mixing of legacy and extended
4067 * advertising commands wherein READ_ADV_TX_POWER is
4068 * also included. So do not call it if extended adv
4069 * is supported otherwise controller will return
4070 * COMMAND_DISALLOWED for extended commands.
4071 */
4072 return __hci_cmd_sync_status(hdev,
4073 HCI_OP_LE_READ_ADV_TX_POWER,
4074 0, NULL, HCI_CMD_TIMEOUT);
4075 }
4076
4077 return 0;
4078}
4079
4080/* Read LE Min/Max Tx Power*/
4081static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
4082{
4083 if (!(hdev->commands[38] & 0x80) ||
4084 test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
4085 return 0;
4086
4087 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
4088 0, NULL, HCI_CMD_TIMEOUT);
4089}
4090
4091/* Read LE Accept List Size */
4092static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
4093{
4094 if (!(hdev->commands[26] & 0x40))
4095 return 0;
4096
4097 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4098 0, NULL, HCI_CMD_TIMEOUT);
4099}
4100
4101/* Clear LE Accept List */
4102static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
4103{
4104 if (!(hdev->commands[26] & 0x80))
4105 return 0;
4106
4107 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
4108 HCI_CMD_TIMEOUT);
4109}
4110
4111/* Read LE Resolving List Size */
4112static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
4113{
4114 if (!(hdev->commands[34] & 0x40))
4115 return 0;
4116
4117 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
4118 0, NULL, HCI_CMD_TIMEOUT);
4119}
4120
4121/* Clear LE Resolving List */
4122static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
4123{
4124 if (!(hdev->commands[34] & 0x20))
4125 return 0;
4126
4127 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
4128 HCI_CMD_TIMEOUT);
4129}
4130
4131/* Set RPA timeout */
4132static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
4133{
4134 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
4135
4136 if (!(hdev->commands[35] & 0x04) ||
4137 test_bit(HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT, &hdev->quirks))
4138 return 0;
4139
4140 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
4141 sizeof(timeout), &timeout,
4142 HCI_CMD_TIMEOUT);
4143}
4144
4145/* Read LE Maximum Data Length */
4146static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
4147{
4148 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4149 return 0;
4150
4151 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
4152 HCI_CMD_TIMEOUT);
4153}
4154
4155/* Read LE Suggested Default Data Length */
4156static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
4157{
4158 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4159 return 0;
4160
4161 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
4162 HCI_CMD_TIMEOUT);
4163}
4164
4165/* Read LE Number of Supported Advertising Sets */
4166static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
4167{
4168 if (!ext_adv_capable(hdev))
4169 return 0;
4170
4171 return __hci_cmd_sync_status(hdev,
4172 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4173 0, NULL, HCI_CMD_TIMEOUT);
4174}
4175
4176/* Write LE Host Supported */
4177static int hci_set_le_support_sync(struct hci_dev *hdev)
4178{
4179 struct hci_cp_write_le_host_supported cp;
4180
4181 /* LE-only devices do not support explicit enablement */
4182 if (!lmp_bredr_capable(hdev))
4183 return 0;
4184
4185 memset(&cp, 0, sizeof(cp));
4186
4187 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
4188 cp.le = 0x01;
4189 cp.simul = 0x00;
4190 }
4191
4192 if (cp.le == lmp_host_le_capable(hdev))
4193 return 0;
4194
4195 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
4196 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4197}
4198
4199/* LE Set Host Feature */
4200static int hci_le_set_host_feature_sync(struct hci_dev *hdev)
4201{
4202 struct hci_cp_le_set_host_feature cp;
4203
4204 if (!cis_capable(hdev))
4205 return 0;
4206
4207 memset(&cp, 0, sizeof(cp));
4208
4209 /* Connected Isochronous Channels (Host Support) */
4210 cp.bit_number = 32;
4211 cp.bit_value = 1;
4212
4213 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE,
4214 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4215}
4216
4217/* LE Controller init stage 3 command sequence */
4218static const struct hci_init_stage le_init3[] = {
4219 /* HCI_OP_LE_SET_EVENT_MASK */
4220 HCI_INIT(hci_le_set_event_mask_sync),
4221 /* HCI_OP_LE_READ_ADV_TX_POWER */
4222 HCI_INIT(hci_le_read_adv_tx_power_sync),
4223 /* HCI_OP_LE_READ_TRANSMIT_POWER */
4224 HCI_INIT(hci_le_read_tx_power_sync),
4225 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
4226 HCI_INIT(hci_le_read_accept_list_size_sync),
4227 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
4228 HCI_INIT(hci_le_clear_accept_list_sync),
4229 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
4230 HCI_INIT(hci_le_read_resolv_list_size_sync),
4231 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
4232 HCI_INIT(hci_le_clear_resolv_list_sync),
4233 /* HCI_OP_LE_SET_RPA_TIMEOUT */
4234 HCI_INIT(hci_le_set_rpa_timeout_sync),
4235 /* HCI_OP_LE_READ_MAX_DATA_LEN */
4236 HCI_INIT(hci_le_read_max_data_len_sync),
4237 /* HCI_OP_LE_READ_DEF_DATA_LEN */
4238 HCI_INIT(hci_le_read_def_data_len_sync),
4239 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
4240 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
4241 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
4242 HCI_INIT(hci_set_le_support_sync),
4243 /* HCI_OP_LE_SET_HOST_FEATURE */
4244 HCI_INIT(hci_le_set_host_feature_sync),
4245 {}
4246};
4247
4248static int hci_init3_sync(struct hci_dev *hdev)
4249{
4250 int err;
4251
4252 bt_dev_dbg(hdev, "");
4253
4254 err = hci_init_stage_sync(hdev, hci_init3);
4255 if (err)
4256 return err;
4257
4258 if (lmp_le_capable(hdev))
4259 return hci_init_stage_sync(hdev, le_init3);
4260
4261 return 0;
4262}
4263
4264static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
4265{
4266 struct hci_cp_delete_stored_link_key cp;
4267
4268 /* Some Broadcom based Bluetooth controllers do not support the
4269 * Delete Stored Link Key command. They are clearly indicating its
4270 * absence in the bit mask of supported commands.
4271 *
4272 * Check the supported commands and only if the command is marked
4273 * as supported send it. If not supported assume that the controller
4274 * does not have actual support for stored link keys which makes this
4275 * command redundant anyway.
4276 *
4277 * Some controllers indicate that they support handling deleting
4278 * stored link keys, but they don't. The quirk lets a driver
4279 * just disable this command.
4280 */
4281 if (!(hdev->commands[6] & 0x80) ||
4282 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
4283 return 0;
4284
4285 memset(&cp, 0, sizeof(cp));
4286 bacpy(&cp.bdaddr, BDADDR_ANY);
4287 cp.delete_all = 0x01;
4288
4289 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
4290 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4291}
4292
4293static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
4294{
4295 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
4296 bool changed = false;
4297
4298 /* Set event mask page 2 if the HCI command for it is supported */
4299 if (!(hdev->commands[22] & 0x04))
4300 return 0;
4301
4302 /* If Connectionless Peripheral Broadcast central role is supported
4303 * enable all necessary events for it.
4304 */
4305 if (lmp_cpb_central_capable(hdev)) {
4306 events[1] |= 0x40; /* Triggered Clock Capture */
4307 events[1] |= 0x80; /* Synchronization Train Complete */
4308 events[2] |= 0x08; /* Truncated Page Complete */
4309 events[2] |= 0x20; /* CPB Channel Map Change */
4310 changed = true;
4311 }
4312
4313 /* If Connectionless Peripheral Broadcast peripheral role is supported
4314 * enable all necessary events for it.
4315 */
4316 if (lmp_cpb_peripheral_capable(hdev)) {
4317 events[2] |= 0x01; /* Synchronization Train Received */
4318 events[2] |= 0x02; /* CPB Receive */
4319 events[2] |= 0x04; /* CPB Timeout */
4320 events[2] |= 0x10; /* Peripheral Page Response Timeout */
4321 changed = true;
4322 }
4323
4324 /* Enable Authenticated Payload Timeout Expired event if supported */
4325 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
4326 events[2] |= 0x80;
4327 changed = true;
4328 }
4329
4330 /* Some Broadcom based controllers indicate support for Set Event
4331 * Mask Page 2 command, but then actually do not support it. Since
4332 * the default value is all bits set to zero, the command is only
4333 * required if the event mask has to be changed. In case no change
4334 * to the event mask is needed, skip this command.
4335 */
4336 if (!changed)
4337 return 0;
4338
4339 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
4340 sizeof(events), events, HCI_CMD_TIMEOUT);
4341}
4342
4343/* Read local codec list if the HCI command is supported */
4344static int hci_read_local_codecs_sync(struct hci_dev *hdev)
4345{
4346 if (hdev->commands[45] & 0x04)
4347 hci_read_supported_codecs_v2(hdev);
4348 else if (hdev->commands[29] & 0x20)
4349 hci_read_supported_codecs(hdev);
4350
4351 return 0;
4352}
4353
4354/* Read local pairing options if the HCI command is supported */
4355static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
4356{
4357 if (!(hdev->commands[41] & 0x08))
4358 return 0;
4359
4360 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
4361 0, NULL, HCI_CMD_TIMEOUT);
4362}
4363
4364/* Get MWS transport configuration if the HCI command is supported */
4365static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
4366{
4367 if (!mws_transport_config_capable(hdev))
4368 return 0;
4369
4370 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
4371 0, NULL, HCI_CMD_TIMEOUT);
4372}
4373
4374/* Check for Synchronization Train support */
4375static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
4376{
4377 if (!lmp_sync_train_capable(hdev))
4378 return 0;
4379
4380 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
4381 0, NULL, HCI_CMD_TIMEOUT);
4382}
4383
4384/* Enable Secure Connections if supported and configured */
4385static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
4386{
4387 u8 support = 0x01;
4388
4389 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
4390 !bredr_sc_enabled(hdev))
4391 return 0;
4392
4393 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
4394 sizeof(support), &support,
4395 HCI_CMD_TIMEOUT);
4396}
4397
4398/* Set erroneous data reporting if supported to the wideband speech
4399 * setting value
4400 */
4401static int hci_set_err_data_report_sync(struct hci_dev *hdev)
4402{
4403 struct hci_cp_write_def_err_data_reporting cp;
4404 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
4405
4406 if (!(hdev->commands[18] & 0x08) ||
4407 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4408 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
4409 return 0;
4410
4411 if (enabled == hdev->err_data_reporting)
4412 return 0;
4413
4414 memset(&cp, 0, sizeof(cp));
4415 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
4416 ERR_DATA_REPORTING_DISABLED;
4417
4418 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4419 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4420}
4421
4422static const struct hci_init_stage hci_init4[] = {
4423 /* HCI_OP_DELETE_STORED_LINK_KEY */
4424 HCI_INIT(hci_delete_stored_link_key_sync),
4425 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
4426 HCI_INIT(hci_set_event_mask_page_2_sync),
4427 /* HCI_OP_READ_LOCAL_CODECS */
4428 HCI_INIT(hci_read_local_codecs_sync),
4429 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
4430 HCI_INIT(hci_read_local_pairing_opts_sync),
4431 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
4432 HCI_INIT(hci_get_mws_transport_config_sync),
4433 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
4434 HCI_INIT(hci_read_sync_train_params_sync),
4435 /* HCI_OP_WRITE_SC_SUPPORT */
4436 HCI_INIT(hci_write_sc_support_1_sync),
4437 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
4438 HCI_INIT(hci_set_err_data_report_sync),
4439 {}
4440};
4441
4442/* Set Suggested Default Data Length to maximum if supported */
4443static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
4444{
4445 struct hci_cp_le_write_def_data_len cp;
4446
4447 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4448 return 0;
4449
4450 memset(&cp, 0, sizeof(cp));
4451 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
4452 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
4453
4454 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
4455 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4456}
4457
4458/* Set Default PHY parameters if command is supported, enables all supported
4459 * PHYs according to the LE Features bits.
4460 */
4461static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
4462{
4463 struct hci_cp_le_set_default_phy cp;
4464
4465 if (!(hdev->commands[35] & 0x20)) {
4466 /* If the command is not supported it means only 1M PHY is
4467 * supported.
4468 */
4469 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
4470 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
4471 return 0;
4472 }
4473
4474 memset(&cp, 0, sizeof(cp));
4475 cp.all_phys = 0x00;
4476 cp.tx_phys = HCI_LE_SET_PHY_1M;
4477 cp.rx_phys = HCI_LE_SET_PHY_1M;
4478
4479 /* Enables 2M PHY if supported */
4480 if (le_2m_capable(hdev)) {
4481 cp.tx_phys |= HCI_LE_SET_PHY_2M;
4482 cp.rx_phys |= HCI_LE_SET_PHY_2M;
4483 }
4484
4485 /* Enables Coded PHY if supported */
4486 if (le_coded_capable(hdev)) {
4487 cp.tx_phys |= HCI_LE_SET_PHY_CODED;
4488 cp.rx_phys |= HCI_LE_SET_PHY_CODED;
4489 }
4490
4491 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
4492 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4493}
4494
4495static const struct hci_init_stage le_init4[] = {
4496 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
4497 HCI_INIT(hci_le_set_write_def_data_len_sync),
4498 /* HCI_OP_LE_SET_DEFAULT_PHY */
4499 HCI_INIT(hci_le_set_default_phy_sync),
4500 {}
4501};
4502
4503static int hci_init4_sync(struct hci_dev *hdev)
4504{
4505 int err;
4506
4507 bt_dev_dbg(hdev, "");
4508
4509 err = hci_init_stage_sync(hdev, hci_init4);
4510 if (err)
4511 return err;
4512
4513 if (lmp_le_capable(hdev))
4514 return hci_init_stage_sync(hdev, le_init4);
4515
4516 return 0;
4517}
4518
4519static int hci_init_sync(struct hci_dev *hdev)
4520{
4521 int err;
4522
4523 err = hci_init1_sync(hdev);
4524 if (err < 0)
4525 return err;
4526
4527 if (hci_dev_test_flag(hdev, HCI_SETUP))
4528 hci_debugfs_create_basic(hdev);
4529
4530 err = hci_init2_sync(hdev);
4531 if (err < 0)
4532 return err;
4533
4534 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
4535 * BR/EDR/LE type controllers. AMP controllers only need the
4536 * first two stages of init.
4537 */
4538 if (hdev->dev_type != HCI_PRIMARY)
4539 return 0;
4540
4541 err = hci_init3_sync(hdev);
4542 if (err < 0)
4543 return err;
4544
4545 err = hci_init4_sync(hdev);
4546 if (err < 0)
4547 return err;
4548
4549 /* This function is only called when the controller is actually in
4550 * configured state. When the controller is marked as unconfigured,
4551 * this initialization procedure is not run.
4552 *
4553 * It means that it is possible that a controller runs through its
4554 * setup phase and then discovers missing settings. If that is the
4555 * case, then this function will not be called. It then will only
4556 * be called during the config phase.
4557 *
4558 * So only when in setup phase or config phase, create the debugfs
4559 * entries and register the SMP channels.
4560 */
4561 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4562 !hci_dev_test_flag(hdev, HCI_CONFIG))
4563 return 0;
4564
4565 if (hci_dev_test_and_set_flag(hdev, HCI_DEBUGFS_CREATED))
4566 return 0;
4567
4568 hci_debugfs_create_common(hdev);
4569
4570 if (lmp_bredr_capable(hdev))
4571 hci_debugfs_create_bredr(hdev);
4572
4573 if (lmp_le_capable(hdev))
4574 hci_debugfs_create_le(hdev);
4575
4576 return 0;
4577}
4578
4579#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
4580
4581static const struct {
4582 unsigned long quirk;
4583 const char *desc;
4584} hci_broken_table[] = {
4585 HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
4586 "HCI Read Local Supported Commands not supported"),
4587 HCI_QUIRK_BROKEN(STORED_LINK_KEY,
4588 "HCI Delete Stored Link Key command is advertised, "
4589 "but not supported."),
4590 HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
4591 "HCI Read Default Erroneous Data Reporting command is "
4592 "advertised, but not supported."),
4593 HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
4594 "HCI Read Transmit Power Level command is advertised, "
4595 "but not supported."),
4596 HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
4597 "HCI Set Event Filter command not supported."),
4598 HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
4599 "HCI Enhanced Setup Synchronous Connection command is "
4600 "advertised, but not supported."),
4601 HCI_QUIRK_BROKEN(SET_RPA_TIMEOUT,
4602 "HCI LE Set Random Private Address Timeout command is "
4603 "advertised, but not supported."),
4604 HCI_QUIRK_BROKEN(LE_CODED,
4605 "HCI LE Coded PHY feature bit is set, "
4606 "but its usage is not supported.")
4607};
4608
4609/* This function handles hdev setup stage:
4610 *
4611 * Calls hdev->setup
4612 * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set.
4613 */
4614static int hci_dev_setup_sync(struct hci_dev *hdev)
4615{
4616 int ret = 0;
4617 bool invalid_bdaddr;
4618 size_t i;
4619
4620 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4621 !test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks))
4622 return 0;
4623
4624 bt_dev_dbg(hdev, "");
4625
4626 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
4627
4628 if (hdev->setup)
4629 ret = hdev->setup(hdev);
4630
4631 for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
4632 if (test_bit(hci_broken_table[i].quirk, &hdev->quirks))
4633 bt_dev_warn(hdev, "%s", hci_broken_table[i].desc);
4634 }
4635
4636 /* The transport driver can set the quirk to mark the
4637 * BD_ADDR invalid before creating the HCI device or in
4638 * its setup callback.
4639 */
4640 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
4641 test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
4642 if (!ret) {
4643 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks) &&
4644 !bacmp(&hdev->public_addr, BDADDR_ANY))
4645 hci_dev_get_bd_addr_from_property(hdev);
4646
4647 if (invalid_bdaddr && bacmp(&hdev->public_addr, BDADDR_ANY) &&
4648 hdev->set_bdaddr) {
4649 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4650 if (!ret)
4651 invalid_bdaddr = false;
4652 }
4653 }
4654
4655 /* The transport driver can set these quirks before
4656 * creating the HCI device or in its setup callback.
4657 *
4658 * For the invalid BD_ADDR quirk it is possible that
4659 * it becomes a valid address if the bootloader does
4660 * provide it (see above).
4661 *
4662 * In case any of them is set, the controller has to
4663 * start up as unconfigured.
4664 */
4665 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
4666 invalid_bdaddr)
4667 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
4668
4669 /* For an unconfigured controller it is required to
4670 * read at least the version information provided by
4671 * the Read Local Version Information command.
4672 *
4673 * If the set_bdaddr driver callback is provided, then
4674 * also the original Bluetooth public device address
4675 * will be read using the Read BD Address command.
4676 */
4677 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4678 return hci_unconf_init_sync(hdev);
4679
4680 return ret;
4681}
4682
4683/* This function handles hdev init stage:
4684 *
4685 * Calls hci_dev_setup_sync to perform setup stage
4686 * Calls hci_init_sync to perform HCI command init sequence
4687 */
4688static int hci_dev_init_sync(struct hci_dev *hdev)
4689{
4690 int ret;
4691
4692 bt_dev_dbg(hdev, "");
4693
4694 atomic_set(&hdev->cmd_cnt, 1);
4695 set_bit(HCI_INIT, &hdev->flags);
4696
4697 ret = hci_dev_setup_sync(hdev);
4698
4699 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
4700 /* If public address change is configured, ensure that
4701 * the address gets programmed. If the driver does not
4702 * support changing the public address, fail the power
4703 * on procedure.
4704 */
4705 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
4706 hdev->set_bdaddr)
4707 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4708 else
4709 ret = -EADDRNOTAVAIL;
4710 }
4711
4712 if (!ret) {
4713 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4714 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4715 ret = hci_init_sync(hdev);
4716 if (!ret && hdev->post_init)
4717 ret = hdev->post_init(hdev);
4718 }
4719 }
4720
4721 /* If the HCI Reset command is clearing all diagnostic settings,
4722 * then they need to be reprogrammed after the init procedure
4723 * completed.
4724 */
4725 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
4726 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4727 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
4728 ret = hdev->set_diag(hdev, true);
4729
4730 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4731 msft_do_open(hdev);
4732 aosp_do_open(hdev);
4733 }
4734
4735 clear_bit(HCI_INIT, &hdev->flags);
4736
4737 return ret;
4738}
4739
4740int hci_dev_open_sync(struct hci_dev *hdev)
4741{
4742 int ret;
4743
4744 bt_dev_dbg(hdev, "");
4745
4746 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
4747 ret = -ENODEV;
4748 goto done;
4749 }
4750
4751 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4752 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
4753 /* Check for rfkill but allow the HCI setup stage to
4754 * proceed (which in itself doesn't cause any RF activity).
4755 */
4756 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
4757 ret = -ERFKILL;
4758 goto done;
4759 }
4760
4761 /* Check for valid public address or a configured static
4762 * random address, but let the HCI setup proceed to
4763 * be able to determine if there is a public address
4764 * or not.
4765 *
4766 * In case of user channel usage, it is not important
4767 * if a public address or static random address is
4768 * available.
4769 *
4770 * This check is only valid for BR/EDR controllers
4771 * since AMP controllers do not have an address.
4772 */
4773 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4774 hdev->dev_type == HCI_PRIMARY &&
4775 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
4776 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
4777 ret = -EADDRNOTAVAIL;
4778 goto done;
4779 }
4780 }
4781
4782 if (test_bit(HCI_UP, &hdev->flags)) {
4783 ret = -EALREADY;
4784 goto done;
4785 }
4786
4787 if (hdev->open(hdev)) {
4788 ret = -EIO;
4789 goto done;
4790 }
4791
4792 hci_devcd_reset(hdev);
4793
4794 set_bit(HCI_RUNNING, &hdev->flags);
4795 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
4796
4797 ret = hci_dev_init_sync(hdev);
4798 if (!ret) {
4799 hci_dev_hold(hdev);
4800 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
4801 hci_adv_instances_set_rpa_expired(hdev, true);
4802 set_bit(HCI_UP, &hdev->flags);
4803 hci_sock_dev_event(hdev, HCI_DEV_UP);
4804 hci_leds_update_powered(hdev, true);
4805 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4806 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
4807 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4808 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4809 hci_dev_test_flag(hdev, HCI_MGMT) &&
4810 hdev->dev_type == HCI_PRIMARY) {
4811 ret = hci_powered_update_sync(hdev);
4812 mgmt_power_on(hdev, ret);
4813 }
4814 } else {
4815 /* Init failed, cleanup */
4816 flush_work(&hdev->tx_work);
4817
4818 /* Since hci_rx_work() is possible to awake new cmd_work
4819 * it should be flushed first to avoid unexpected call of
4820 * hci_cmd_work()
4821 */
4822 flush_work(&hdev->rx_work);
4823 flush_work(&hdev->cmd_work);
4824
4825 skb_queue_purge(&hdev->cmd_q);
4826 skb_queue_purge(&hdev->rx_q);
4827
4828 if (hdev->flush)
4829 hdev->flush(hdev);
4830
4831 if (hdev->sent_cmd) {
4832 cancel_delayed_work_sync(&hdev->cmd_timer);
4833 kfree_skb(hdev->sent_cmd);
4834 hdev->sent_cmd = NULL;
4835 }
4836
4837 clear_bit(HCI_RUNNING, &hdev->flags);
4838 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4839
4840 hdev->close(hdev);
4841 hdev->flags &= BIT(HCI_RAW);
4842 }
4843
4844done:
4845 return ret;
4846}
4847
4848/* This function requires the caller holds hdev->lock */
4849static void hci_pend_le_actions_clear(struct hci_dev *hdev)
4850{
4851 struct hci_conn_params *p;
4852
4853 list_for_each_entry(p, &hdev->le_conn_params, list) {
4854 hci_pend_le_list_del_init(p);
4855 if (p->conn) {
4856 hci_conn_drop(p->conn);
4857 hci_conn_put(p->conn);
4858 p->conn = NULL;
4859 }
4860 }
4861
4862 BT_DBG("All LE pending actions cleared");
4863}
4864
4865static int hci_dev_shutdown(struct hci_dev *hdev)
4866{
4867 int err = 0;
4868 /* Similar to how we first do setup and then set the exclusive access
4869 * bit for userspace, we must first unset userchannel and then clean up.
4870 * Otherwise, the kernel can't properly use the hci channel to clean up
4871 * the controller (some shutdown routines require sending additional
4872 * commands to the controller for example).
4873 */
4874 bool was_userchannel =
4875 hci_dev_test_and_clear_flag(hdev, HCI_USER_CHANNEL);
4876
4877 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
4878 test_bit(HCI_UP, &hdev->flags)) {
4879 /* Execute vendor specific shutdown routine */
4880 if (hdev->shutdown)
4881 err = hdev->shutdown(hdev);
4882 }
4883
4884 if (was_userchannel)
4885 hci_dev_set_flag(hdev, HCI_USER_CHANNEL);
4886
4887 return err;
4888}
4889
4890int hci_dev_close_sync(struct hci_dev *hdev)
4891{
4892 bool auto_off;
4893 int err = 0;
4894
4895 bt_dev_dbg(hdev, "");
4896
4897 cancel_delayed_work(&hdev->power_off);
4898 cancel_delayed_work(&hdev->ncmd_timer);
4899 cancel_delayed_work(&hdev->le_scan_disable);
4900
4901 hci_request_cancel_all(hdev);
4902
4903 if (hdev->adv_instance_timeout) {
4904 cancel_delayed_work_sync(&hdev->adv_instance_expire);
4905 hdev->adv_instance_timeout = 0;
4906 }
4907
4908 err = hci_dev_shutdown(hdev);
4909
4910 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
4911 cancel_delayed_work_sync(&hdev->cmd_timer);
4912 return err;
4913 }
4914
4915 hci_leds_update_powered(hdev, false);
4916
4917 /* Flush RX and TX works */
4918 flush_work(&hdev->tx_work);
4919 flush_work(&hdev->rx_work);
4920
4921 if (hdev->discov_timeout > 0) {
4922 hdev->discov_timeout = 0;
4923 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
4924 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
4925 }
4926
4927 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
4928 cancel_delayed_work(&hdev->service_cache);
4929
4930 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4931 struct adv_info *adv_instance;
4932
4933 cancel_delayed_work_sync(&hdev->rpa_expired);
4934
4935 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
4936 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
4937 }
4938
4939 /* Avoid potential lockdep warnings from the *_flush() calls by
4940 * ensuring the workqueue is empty up front.
4941 */
4942 drain_workqueue(hdev->workqueue);
4943
4944 hci_dev_lock(hdev);
4945
4946 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
4947
4948 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
4949
4950 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
4951 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4952 hci_dev_test_flag(hdev, HCI_MGMT))
4953 __mgmt_power_off(hdev);
4954
4955 hci_inquiry_cache_flush(hdev);
4956 hci_pend_le_actions_clear(hdev);
4957 hci_conn_hash_flush(hdev);
4958 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
4959 smp_unregister(hdev);
4960 hci_dev_unlock(hdev);
4961
4962 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
4963
4964 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4965 aosp_do_close(hdev);
4966 msft_do_close(hdev);
4967 }
4968
4969 if (hdev->flush)
4970 hdev->flush(hdev);
4971
4972 /* Reset device */
4973 skb_queue_purge(&hdev->cmd_q);
4974 atomic_set(&hdev->cmd_cnt, 1);
4975 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
4976 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4977 set_bit(HCI_INIT, &hdev->flags);
4978 hci_reset_sync(hdev);
4979 clear_bit(HCI_INIT, &hdev->flags);
4980 }
4981
4982 /* flush cmd work */
4983 flush_work(&hdev->cmd_work);
4984
4985 /* Drop queues */
4986 skb_queue_purge(&hdev->rx_q);
4987 skb_queue_purge(&hdev->cmd_q);
4988 skb_queue_purge(&hdev->raw_q);
4989
4990 /* Drop last sent command */
4991 if (hdev->sent_cmd) {
4992 cancel_delayed_work_sync(&hdev->cmd_timer);
4993 kfree_skb(hdev->sent_cmd);
4994 hdev->sent_cmd = NULL;
4995 }
4996
4997 clear_bit(HCI_RUNNING, &hdev->flags);
4998 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4999
5000 /* After this point our queues are empty and no tasks are scheduled. */
5001 hdev->close(hdev);
5002
5003 /* Clear flags */
5004 hdev->flags &= BIT(HCI_RAW);
5005 hci_dev_clear_volatile_flags(hdev);
5006
5007 /* Controller radio is available but is currently powered down */
5008 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
5009
5010 memset(hdev->eir, 0, sizeof(hdev->eir));
5011 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
5012 bacpy(&hdev->random_addr, BDADDR_ANY);
5013 hci_codec_list_clear(&hdev->local_codecs);
5014
5015 hci_dev_put(hdev);
5016 return err;
5017}
5018
5019/* This function perform power on HCI command sequence as follows:
5020 *
5021 * If controller is already up (HCI_UP) performs hci_powered_update_sync
5022 * sequence otherwise run hci_dev_open_sync which will follow with
5023 * hci_powered_update_sync after the init sequence is completed.
5024 */
5025static int hci_power_on_sync(struct hci_dev *hdev)
5026{
5027 int err;
5028
5029 if (test_bit(HCI_UP, &hdev->flags) &&
5030 hci_dev_test_flag(hdev, HCI_MGMT) &&
5031 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
5032 cancel_delayed_work(&hdev->power_off);
5033 return hci_powered_update_sync(hdev);
5034 }
5035
5036 err = hci_dev_open_sync(hdev);
5037 if (err < 0)
5038 return err;
5039
5040 /* During the HCI setup phase, a few error conditions are
5041 * ignored and they need to be checked now. If they are still
5042 * valid, it is important to return the device back off.
5043 */
5044 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
5045 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
5046 (hdev->dev_type == HCI_PRIMARY &&
5047 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
5048 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
5049 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
5050 hci_dev_close_sync(hdev);
5051 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
5052 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
5053 HCI_AUTO_OFF_TIMEOUT);
5054 }
5055
5056 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
5057 /* For unconfigured devices, set the HCI_RAW flag
5058 * so that userspace can easily identify them.
5059 */
5060 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5061 set_bit(HCI_RAW, &hdev->flags);
5062
5063 /* For fully configured devices, this will send
5064 * the Index Added event. For unconfigured devices,
5065 * it will send Unconfigued Index Added event.
5066 *
5067 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
5068 * and no event will be send.
5069 */
5070 mgmt_index_added(hdev);
5071 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
5072 /* When the controller is now configured, then it
5073 * is important to clear the HCI_RAW flag.
5074 */
5075 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5076 clear_bit(HCI_RAW, &hdev->flags);
5077
5078 /* Powering on the controller with HCI_CONFIG set only
5079 * happens with the transition from unconfigured to
5080 * configured. This will send the Index Added event.
5081 */
5082 mgmt_index_added(hdev);
5083 }
5084
5085 return 0;
5086}
5087
5088static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
5089{
5090 struct hci_cp_remote_name_req_cancel cp;
5091
5092 memset(&cp, 0, sizeof(cp));
5093 bacpy(&cp.bdaddr, addr);
5094
5095 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
5096 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5097}
5098
5099int hci_stop_discovery_sync(struct hci_dev *hdev)
5100{
5101 struct discovery_state *d = &hdev->discovery;
5102 struct inquiry_entry *e;
5103 int err;
5104
5105 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
5106
5107 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
5108 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
5109 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
5110 0, NULL, HCI_CMD_TIMEOUT);
5111 if (err)
5112 return err;
5113 }
5114
5115 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5116 cancel_delayed_work(&hdev->le_scan_disable);
5117
5118 err = hci_scan_disable_sync(hdev);
5119 if (err)
5120 return err;
5121 }
5122
5123 } else {
5124 err = hci_scan_disable_sync(hdev);
5125 if (err)
5126 return err;
5127 }
5128
5129 /* Resume advertising if it was paused */
5130 if (use_ll_privacy(hdev))
5131 hci_resume_advertising_sync(hdev);
5132
5133 /* No further actions needed for LE-only discovery */
5134 if (d->type == DISCOV_TYPE_LE)
5135 return 0;
5136
5137 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
5138 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
5139 NAME_PENDING);
5140 if (!e)
5141 return 0;
5142
5143 return hci_remote_name_cancel_sync(hdev, &e->data.bdaddr);
5144 }
5145
5146 return 0;
5147}
5148
5149static int hci_disconnect_phy_link_sync(struct hci_dev *hdev, u16 handle,
5150 u8 reason)
5151{
5152 struct hci_cp_disconn_phy_link cp;
5153
5154 memset(&cp, 0, sizeof(cp));
5155 cp.phy_handle = HCI_PHY_HANDLE(handle);
5156 cp.reason = reason;
5157
5158 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONN_PHY_LINK,
5159 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5160}
5161
5162static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
5163 u8 reason)
5164{
5165 struct hci_cp_disconnect cp;
5166
5167 if (conn->type == AMP_LINK)
5168 return hci_disconnect_phy_link_sync(hdev, conn->handle, reason);
5169
5170 if (test_bit(HCI_CONN_BIG_CREATED, &conn->flags)) {
5171 /* This is a BIS connection, hci_conn_del will
5172 * do the necessary cleanup.
5173 */
5174 hci_dev_lock(hdev);
5175 hci_conn_failed(conn, reason);
5176 hci_dev_unlock(hdev);
5177
5178 return 0;
5179 }
5180
5181 memset(&cp, 0, sizeof(cp));
5182 cp.handle = cpu_to_le16(conn->handle);
5183 cp.reason = reason;
5184
5185 /* Wait for HCI_EV_DISCONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5186 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5187 * used when suspending or powering off, where we don't want to wait
5188 * for the peer's response.
5189 */
5190 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5191 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
5192 sizeof(cp), &cp,
5193 HCI_EV_DISCONN_COMPLETE,
5194 HCI_CMD_TIMEOUT, NULL);
5195
5196 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
5197 HCI_CMD_TIMEOUT);
5198}
5199
5200static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
5201 struct hci_conn *conn, u8 reason)
5202{
5203 /* Return reason if scanning since the connection shall probably be
5204 * cleanup directly.
5205 */
5206 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
5207 return reason;
5208
5209 if (conn->role == HCI_ROLE_SLAVE ||
5210 test_and_set_bit(HCI_CONN_CANCEL, &conn->flags))
5211 return 0;
5212
5213 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
5214 0, NULL, HCI_CMD_TIMEOUT);
5215}
5216
5217static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn,
5218 u8 reason)
5219{
5220 if (conn->type == LE_LINK)
5221 return hci_le_connect_cancel_sync(hdev, conn, reason);
5222
5223 if (conn->type == ISO_LINK) {
5224 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
5225 * page 1857:
5226 *
5227 * If this command is issued for a CIS on the Central and the
5228 * CIS is successfully terminated before being established,
5229 * then an HCI_LE_CIS_Established event shall also be sent for
5230 * this CIS with the Status Operation Cancelled by Host (0x44).
5231 */
5232 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
5233 return hci_disconnect_sync(hdev, conn, reason);
5234
5235 /* CIS with no Create CIS sent have nothing to cancel */
5236 if (bacmp(&conn->dst, BDADDR_ANY))
5237 return HCI_ERROR_LOCAL_HOST_TERM;
5238
5239 /* There is no way to cancel a BIS without terminating the BIG
5240 * which is done later on connection cleanup.
5241 */
5242 return 0;
5243 }
5244
5245 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
5246 return 0;
5247
5248 /* Wait for HCI_EV_CONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5249 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5250 * used when suspending or powering off, where we don't want to wait
5251 * for the peer's response.
5252 */
5253 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5254 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN_CANCEL,
5255 6, &conn->dst,
5256 HCI_EV_CONN_COMPLETE,
5257 HCI_CMD_TIMEOUT, NULL);
5258
5259 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
5260 6, &conn->dst, HCI_CMD_TIMEOUT);
5261}
5262
5263static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
5264 u8 reason)
5265{
5266 struct hci_cp_reject_sync_conn_req cp;
5267
5268 memset(&cp, 0, sizeof(cp));
5269 bacpy(&cp.bdaddr, &conn->dst);
5270 cp.reason = reason;
5271
5272 /* SCO rejection has its own limited set of
5273 * allowed error values (0x0D-0x0F).
5274 */
5275 if (reason < 0x0d || reason > 0x0f)
5276 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
5277
5278 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
5279 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5280}
5281
5282static int hci_le_reject_cis_sync(struct hci_dev *hdev, struct hci_conn *conn,
5283 u8 reason)
5284{
5285 struct hci_cp_le_reject_cis cp;
5286
5287 memset(&cp, 0, sizeof(cp));
5288 cp.handle = cpu_to_le16(conn->handle);
5289 cp.reason = reason;
5290
5291 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REJECT_CIS,
5292 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5293}
5294
5295static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
5296 u8 reason)
5297{
5298 struct hci_cp_reject_conn_req cp;
5299
5300 if (conn->type == ISO_LINK)
5301 return hci_le_reject_cis_sync(hdev, conn, reason);
5302
5303 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
5304 return hci_reject_sco_sync(hdev, conn, reason);
5305
5306 memset(&cp, 0, sizeof(cp));
5307 bacpy(&cp.bdaddr, &conn->dst);
5308 cp.reason = reason;
5309
5310 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
5311 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5312}
5313
5314int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
5315{
5316 int err = 0;
5317 u16 handle = conn->handle;
5318 bool disconnect = false;
5319 struct hci_conn *c;
5320
5321 switch (conn->state) {
5322 case BT_CONNECTED:
5323 case BT_CONFIG:
5324 err = hci_disconnect_sync(hdev, conn, reason);
5325 break;
5326 case BT_CONNECT:
5327 err = hci_connect_cancel_sync(hdev, conn, reason);
5328 break;
5329 case BT_CONNECT2:
5330 err = hci_reject_conn_sync(hdev, conn, reason);
5331 break;
5332 case BT_OPEN:
5333 case BT_BOUND:
5334 break;
5335 default:
5336 disconnect = true;
5337 break;
5338 }
5339
5340 hci_dev_lock(hdev);
5341
5342 /* Check if the connection has been cleaned up concurrently */
5343 c = hci_conn_hash_lookup_handle(hdev, handle);
5344 if (!c || c != conn) {
5345 err = 0;
5346 goto unlock;
5347 }
5348
5349 /* Cleanup hci_conn object if it cannot be cancelled as it
5350 * likelly means the controller and host stack are out of sync
5351 * or in case of LE it was still scanning so it can be cleanup
5352 * safely.
5353 */
5354 if (disconnect) {
5355 conn->state = BT_CLOSED;
5356 hci_disconn_cfm(conn, reason);
5357 hci_conn_del(conn);
5358 } else {
5359 hci_conn_failed(conn, reason);
5360 }
5361
5362unlock:
5363 hci_dev_unlock(hdev);
5364 return err;
5365}
5366
5367static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
5368{
5369 struct list_head *head = &hdev->conn_hash.list;
5370 struct hci_conn *conn;
5371
5372 rcu_read_lock();
5373 while ((conn = list_first_or_null_rcu(head, struct hci_conn, list))) {
5374 /* Make sure the connection is not freed while unlocking */
5375 conn = hci_conn_get(conn);
5376 rcu_read_unlock();
5377 /* Disregard possible errors since hci_conn_del shall have been
5378 * called even in case of errors had occurred since it would
5379 * then cause hci_conn_failed to be called which calls
5380 * hci_conn_del internally.
5381 */
5382 hci_abort_conn_sync(hdev, conn, reason);
5383 hci_conn_put(conn);
5384 rcu_read_lock();
5385 }
5386 rcu_read_unlock();
5387
5388 return 0;
5389}
5390
5391/* This function perform power off HCI command sequence as follows:
5392 *
5393 * Clear Advertising
5394 * Stop Discovery
5395 * Disconnect all connections
5396 * hci_dev_close_sync
5397 */
5398static int hci_power_off_sync(struct hci_dev *hdev)
5399{
5400 int err;
5401
5402 /* If controller is already down there is nothing to do */
5403 if (!test_bit(HCI_UP, &hdev->flags))
5404 return 0;
5405
5406 if (test_bit(HCI_ISCAN, &hdev->flags) ||
5407 test_bit(HCI_PSCAN, &hdev->flags)) {
5408 err = hci_write_scan_enable_sync(hdev, 0x00);
5409 if (err)
5410 return err;
5411 }
5412
5413 err = hci_clear_adv_sync(hdev, NULL, false);
5414 if (err)
5415 return err;
5416
5417 err = hci_stop_discovery_sync(hdev);
5418 if (err)
5419 return err;
5420
5421 /* Terminated due to Power Off */
5422 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5423 if (err)
5424 return err;
5425
5426 return hci_dev_close_sync(hdev);
5427}
5428
5429int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
5430{
5431 if (val)
5432 return hci_power_on_sync(hdev);
5433
5434 return hci_power_off_sync(hdev);
5435}
5436
5437static int hci_write_iac_sync(struct hci_dev *hdev)
5438{
5439 struct hci_cp_write_current_iac_lap cp;
5440
5441 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
5442 return 0;
5443
5444 memset(&cp, 0, sizeof(cp));
5445
5446 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
5447 /* Limited discoverable mode */
5448 cp.num_iac = min_t(u8, hdev->num_iac, 2);
5449 cp.iac_lap[0] = 0x00; /* LIAC */
5450 cp.iac_lap[1] = 0x8b;
5451 cp.iac_lap[2] = 0x9e;
5452 cp.iac_lap[3] = 0x33; /* GIAC */
5453 cp.iac_lap[4] = 0x8b;
5454 cp.iac_lap[5] = 0x9e;
5455 } else {
5456 /* General discoverable mode */
5457 cp.num_iac = 1;
5458 cp.iac_lap[0] = 0x33; /* GIAC */
5459 cp.iac_lap[1] = 0x8b;
5460 cp.iac_lap[2] = 0x9e;
5461 }
5462
5463 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
5464 (cp.num_iac * 3) + 1, &cp,
5465 HCI_CMD_TIMEOUT);
5466}
5467
5468int hci_update_discoverable_sync(struct hci_dev *hdev)
5469{
5470 int err = 0;
5471
5472 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
5473 err = hci_write_iac_sync(hdev);
5474 if (err)
5475 return err;
5476
5477 err = hci_update_scan_sync(hdev);
5478 if (err)
5479 return err;
5480
5481 err = hci_update_class_sync(hdev);
5482 if (err)
5483 return err;
5484 }
5485
5486 /* Advertising instances don't use the global discoverable setting, so
5487 * only update AD if advertising was enabled using Set Advertising.
5488 */
5489 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
5490 err = hci_update_adv_data_sync(hdev, 0x00);
5491 if (err)
5492 return err;
5493
5494 /* Discoverable mode affects the local advertising
5495 * address in limited privacy mode.
5496 */
5497 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
5498 if (ext_adv_capable(hdev))
5499 err = hci_start_ext_adv_sync(hdev, 0x00);
5500 else
5501 err = hci_enable_advertising_sync(hdev);
5502 }
5503 }
5504
5505 return err;
5506}
5507
5508static int update_discoverable_sync(struct hci_dev *hdev, void *data)
5509{
5510 return hci_update_discoverable_sync(hdev);
5511}
5512
5513int hci_update_discoverable(struct hci_dev *hdev)
5514{
5515 /* Only queue if it would have any effect */
5516 if (hdev_is_powered(hdev) &&
5517 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
5518 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
5519 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
5520 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
5521 NULL);
5522
5523 return 0;
5524}
5525
5526int hci_update_connectable_sync(struct hci_dev *hdev)
5527{
5528 int err;
5529
5530 err = hci_update_scan_sync(hdev);
5531 if (err)
5532 return err;
5533
5534 /* If BR/EDR is not enabled and we disable advertising as a
5535 * by-product of disabling connectable, we need to update the
5536 * advertising flags.
5537 */
5538 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5539 err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
5540
5541 /* Update the advertising parameters if necessary */
5542 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
5543 !list_empty(&hdev->adv_instances)) {
5544 if (ext_adv_capable(hdev))
5545 err = hci_start_ext_adv_sync(hdev,
5546 hdev->cur_adv_instance);
5547 else
5548 err = hci_enable_advertising_sync(hdev);
5549
5550 if (err)
5551 return err;
5552 }
5553
5554 return hci_update_passive_scan_sync(hdev);
5555}
5556
5557static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
5558{
5559 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
5560 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
5561 struct hci_cp_inquiry cp;
5562
5563 bt_dev_dbg(hdev, "");
5564
5565 if (test_bit(HCI_INQUIRY, &hdev->flags))
5566 return 0;
5567
5568 hci_dev_lock(hdev);
5569 hci_inquiry_cache_flush(hdev);
5570 hci_dev_unlock(hdev);
5571
5572 memset(&cp, 0, sizeof(cp));
5573
5574 if (hdev->discovery.limited)
5575 memcpy(&cp.lap, liac, sizeof(cp.lap));
5576 else
5577 memcpy(&cp.lap, giac, sizeof(cp.lap));
5578
5579 cp.length = length;
5580
5581 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
5582 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5583}
5584
5585static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
5586{
5587 u8 own_addr_type;
5588 /* Accept list is not used for discovery */
5589 u8 filter_policy = 0x00;
5590 /* Default is to enable duplicates filter */
5591 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
5592 int err;
5593
5594 bt_dev_dbg(hdev, "");
5595
5596 /* If controller is scanning, it means the passive scanning is
5597 * running. Thus, we should temporarily stop it in order to set the
5598 * discovery scanning parameters.
5599 */
5600 err = hci_scan_disable_sync(hdev);
5601 if (err) {
5602 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
5603 return err;
5604 }
5605
5606 cancel_interleave_scan(hdev);
5607
5608 /* Pause address resolution for active scan and stop advertising if
5609 * privacy is enabled.
5610 */
5611 err = hci_pause_addr_resolution(hdev);
5612 if (err)
5613 goto failed;
5614
5615 /* All active scans will be done with either a resolvable private
5616 * address (when privacy feature has been enabled) or non-resolvable
5617 * private address.
5618 */
5619 err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
5620 &own_addr_type);
5621 if (err < 0)
5622 own_addr_type = ADDR_LE_DEV_PUBLIC;
5623
5624 if (hci_is_adv_monitoring(hdev) ||
5625 (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
5626 hdev->discovery.result_filtering)) {
5627 /* Duplicate filter should be disabled when some advertisement
5628 * monitor is activated, otherwise AdvMon can only receive one
5629 * advertisement for one peer(*) during active scanning, and
5630 * might report loss to these peers.
5631 *
5632 * If controller does strict duplicate filtering and the
5633 * discovery requires result filtering disables controller based
5634 * filtering since that can cause reports that would match the
5635 * host filter to not be reported.
5636 */
5637 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
5638 }
5639
5640 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
5641 hdev->le_scan_window_discovery,
5642 own_addr_type, filter_policy, filter_dup);
5643 if (!err)
5644 return err;
5645
5646failed:
5647 /* Resume advertising if it was paused */
5648 if (use_ll_privacy(hdev))
5649 hci_resume_advertising_sync(hdev);
5650
5651 /* Resume passive scanning */
5652 hci_update_passive_scan_sync(hdev);
5653 return err;
5654}
5655
5656static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
5657{
5658 int err;
5659
5660 bt_dev_dbg(hdev, "");
5661
5662 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
5663 if (err)
5664 return err;
5665
5666 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5667}
5668
5669int hci_start_discovery_sync(struct hci_dev *hdev)
5670{
5671 unsigned long timeout;
5672 int err;
5673
5674 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
5675
5676 switch (hdev->discovery.type) {
5677 case DISCOV_TYPE_BREDR:
5678 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5679 case DISCOV_TYPE_INTERLEAVED:
5680 /* When running simultaneous discovery, the LE scanning time
5681 * should occupy the whole discovery time sine BR/EDR inquiry
5682 * and LE scanning are scheduled by the controller.
5683 *
5684 * For interleaving discovery in comparison, BR/EDR inquiry
5685 * and LE scanning are done sequentially with separate
5686 * timeouts.
5687 */
5688 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
5689 &hdev->quirks)) {
5690 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5691 /* During simultaneous discovery, we double LE scan
5692 * interval. We must leave some time for the controller
5693 * to do BR/EDR inquiry.
5694 */
5695 err = hci_start_interleaved_discovery_sync(hdev);
5696 break;
5697 }
5698
5699 timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
5700 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5701 break;
5702 case DISCOV_TYPE_LE:
5703 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5704 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5705 break;
5706 default:
5707 return -EINVAL;
5708 }
5709
5710 if (err)
5711 return err;
5712
5713 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
5714
5715 queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
5716 timeout);
5717 return 0;
5718}
5719
5720static void hci_suspend_monitor_sync(struct hci_dev *hdev)
5721{
5722 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5723 case HCI_ADV_MONITOR_EXT_MSFT:
5724 msft_suspend_sync(hdev);
5725 break;
5726 default:
5727 return;
5728 }
5729}
5730
5731/* This function disables discovery and mark it as paused */
5732static int hci_pause_discovery_sync(struct hci_dev *hdev)
5733{
5734 int old_state = hdev->discovery.state;
5735 int err;
5736
5737 /* If discovery already stopped/stopping/paused there nothing to do */
5738 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
5739 hdev->discovery_paused)
5740 return 0;
5741
5742 hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
5743 err = hci_stop_discovery_sync(hdev);
5744 if (err)
5745 return err;
5746
5747 hdev->discovery_paused = true;
5748 hdev->discovery_old_state = old_state;
5749 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
5750
5751 return 0;
5752}
5753
5754static int hci_update_event_filter_sync(struct hci_dev *hdev)
5755{
5756 struct bdaddr_list_with_flags *b;
5757 u8 scan = SCAN_DISABLED;
5758 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
5759 int err;
5760
5761 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5762 return 0;
5763
5764 /* Some fake CSR controllers lock up after setting this type of
5765 * filter, so avoid sending the request altogether.
5766 */
5767 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
5768 return 0;
5769
5770 /* Always clear event filter when starting */
5771 hci_clear_event_filter_sync(hdev);
5772
5773 list_for_each_entry(b, &hdev->accept_list, list) {
5774 if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
5775 continue;
5776
5777 bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
5778
5779 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
5780 HCI_CONN_SETUP_ALLOW_BDADDR,
5781 &b->bdaddr,
5782 HCI_CONN_SETUP_AUTO_ON);
5783 if (err)
5784 bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
5785 &b->bdaddr);
5786 else
5787 scan = SCAN_PAGE;
5788 }
5789
5790 if (scan && !scanning)
5791 hci_write_scan_enable_sync(hdev, scan);
5792 else if (!scan && scanning)
5793 hci_write_scan_enable_sync(hdev, scan);
5794
5795 return 0;
5796}
5797
5798/* This function disables scan (BR and LE) and mark it as paused */
5799static int hci_pause_scan_sync(struct hci_dev *hdev)
5800{
5801 if (hdev->scanning_paused)
5802 return 0;
5803
5804 /* Disable page scan if enabled */
5805 if (test_bit(HCI_PSCAN, &hdev->flags))
5806 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
5807
5808 hci_scan_disable_sync(hdev);
5809
5810 hdev->scanning_paused = true;
5811
5812 return 0;
5813}
5814
5815/* This function performs the HCI suspend procedures in the follow order:
5816 *
5817 * Pause discovery (active scanning/inquiry)
5818 * Pause Directed Advertising/Advertising
5819 * Pause Scanning (passive scanning in case discovery was not active)
5820 * Disconnect all connections
5821 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
5822 * otherwise:
5823 * Update event mask (only set events that are allowed to wake up the host)
5824 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
5825 * Update passive scanning (lower duty cycle)
5826 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
5827 */
5828int hci_suspend_sync(struct hci_dev *hdev)
5829{
5830 int err;
5831
5832 /* If marked as suspended there nothing to do */
5833 if (hdev->suspended)
5834 return 0;
5835
5836 /* Mark device as suspended */
5837 hdev->suspended = true;
5838
5839 /* Pause discovery if not already stopped */
5840 hci_pause_discovery_sync(hdev);
5841
5842 /* Pause other advertisements */
5843 hci_pause_advertising_sync(hdev);
5844
5845 /* Suspend monitor filters */
5846 hci_suspend_monitor_sync(hdev);
5847
5848 /* Prevent disconnects from causing scanning to be re-enabled */
5849 hci_pause_scan_sync(hdev);
5850
5851 if (hci_conn_count(hdev)) {
5852 /* Soft disconnect everything (power off) */
5853 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5854 if (err) {
5855 /* Set state to BT_RUNNING so resume doesn't notify */
5856 hdev->suspend_state = BT_RUNNING;
5857 hci_resume_sync(hdev);
5858 return err;
5859 }
5860
5861 /* Update event mask so only the allowed event can wakeup the
5862 * host.
5863 */
5864 hci_set_event_mask_sync(hdev);
5865 }
5866
5867 /* Only configure accept list if disconnect succeeded and wake
5868 * isn't being prevented.
5869 */
5870 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
5871 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
5872 return 0;
5873 }
5874
5875 /* Unpause to take care of updating scanning params */
5876 hdev->scanning_paused = false;
5877
5878 /* Enable event filter for paired devices */
5879 hci_update_event_filter_sync(hdev);
5880
5881 /* Update LE passive scan if enabled */
5882 hci_update_passive_scan_sync(hdev);
5883
5884 /* Pause scan changes again. */
5885 hdev->scanning_paused = true;
5886
5887 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
5888
5889 return 0;
5890}
5891
5892/* This function resumes discovery */
5893static int hci_resume_discovery_sync(struct hci_dev *hdev)
5894{
5895 int err;
5896
5897 /* If discovery not paused there nothing to do */
5898 if (!hdev->discovery_paused)
5899 return 0;
5900
5901 hdev->discovery_paused = false;
5902
5903 hci_discovery_set_state(hdev, DISCOVERY_STARTING);
5904
5905 err = hci_start_discovery_sync(hdev);
5906
5907 hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
5908 DISCOVERY_FINDING);
5909
5910 return err;
5911}
5912
5913static void hci_resume_monitor_sync(struct hci_dev *hdev)
5914{
5915 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5916 case HCI_ADV_MONITOR_EXT_MSFT:
5917 msft_resume_sync(hdev);
5918 break;
5919 default:
5920 return;
5921 }
5922}
5923
5924/* This function resume scan and reset paused flag */
5925static int hci_resume_scan_sync(struct hci_dev *hdev)
5926{
5927 if (!hdev->scanning_paused)
5928 return 0;
5929
5930 hdev->scanning_paused = false;
5931
5932 hci_update_scan_sync(hdev);
5933
5934 /* Reset passive scanning to normal */
5935 hci_update_passive_scan_sync(hdev);
5936
5937 return 0;
5938}
5939
5940/* This function performs the HCI suspend procedures in the follow order:
5941 *
5942 * Restore event mask
5943 * Clear event filter
5944 * Update passive scanning (normal duty cycle)
5945 * Resume Directed Advertising/Advertising
5946 * Resume discovery (active scanning/inquiry)
5947 */
5948int hci_resume_sync(struct hci_dev *hdev)
5949{
5950 /* If not marked as suspended there nothing to do */
5951 if (!hdev->suspended)
5952 return 0;
5953
5954 hdev->suspended = false;
5955
5956 /* Restore event mask */
5957 hci_set_event_mask_sync(hdev);
5958
5959 /* Clear any event filters and restore scan state */
5960 hci_clear_event_filter_sync(hdev);
5961
5962 /* Resume scanning */
5963 hci_resume_scan_sync(hdev);
5964
5965 /* Resume monitor filters */
5966 hci_resume_monitor_sync(hdev);
5967
5968 /* Resume other advertisements */
5969 hci_resume_advertising_sync(hdev);
5970
5971 /* Resume discovery */
5972 hci_resume_discovery_sync(hdev);
5973
5974 return 0;
5975}
5976
5977static bool conn_use_rpa(struct hci_conn *conn)
5978{
5979 struct hci_dev *hdev = conn->hdev;
5980
5981 return hci_dev_test_flag(hdev, HCI_PRIVACY);
5982}
5983
5984static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
5985 struct hci_conn *conn)
5986{
5987 struct hci_cp_le_set_ext_adv_params cp;
5988 int err;
5989 bdaddr_t random_addr;
5990 u8 own_addr_type;
5991
5992 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5993 &own_addr_type);
5994 if (err)
5995 return err;
5996
5997 /* Set require_privacy to false so that the remote device has a
5998 * chance of identifying us.
5999 */
6000 err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
6001 &own_addr_type, &random_addr);
6002 if (err)
6003 return err;
6004
6005 memset(&cp, 0, sizeof(cp));
6006
6007 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
6008 cp.channel_map = hdev->le_adv_channel_map;
6009 cp.tx_power = HCI_TX_POWER_INVALID;
6010 cp.primary_phy = HCI_ADV_PHY_1M;
6011 cp.secondary_phy = HCI_ADV_PHY_1M;
6012 cp.handle = 0x00; /* Use instance 0 for directed adv */
6013 cp.own_addr_type = own_addr_type;
6014 cp.peer_addr_type = conn->dst_type;
6015 bacpy(&cp.peer_addr, &conn->dst);
6016
6017 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
6018 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
6019 * does not supports advertising data when the advertising set already
6020 * contains some, the controller shall return erroc code 'Invalid
6021 * HCI Command Parameters(0x12).
6022 * So it is required to remove adv set for handle 0x00. since we use
6023 * instance 0 for directed adv.
6024 */
6025 err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
6026 if (err)
6027 return err;
6028
6029 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
6030 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6031 if (err)
6032 return err;
6033
6034 /* Check if random address need to be updated */
6035 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
6036 bacmp(&random_addr, BDADDR_ANY) &&
6037 bacmp(&random_addr, &hdev->random_addr)) {
6038 err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
6039 &random_addr);
6040 if (err)
6041 return err;
6042 }
6043
6044 return hci_enable_ext_advertising_sync(hdev, 0x00);
6045}
6046
6047static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
6048 struct hci_conn *conn)
6049{
6050 struct hci_cp_le_set_adv_param cp;
6051 u8 status;
6052 u8 own_addr_type;
6053 u8 enable;
6054
6055 if (ext_adv_capable(hdev))
6056 return hci_le_ext_directed_advertising_sync(hdev, conn);
6057
6058 /* Clear the HCI_LE_ADV bit temporarily so that the
6059 * hci_update_random_address knows that it's safe to go ahead
6060 * and write a new random address. The flag will be set back on
6061 * as soon as the SET_ADV_ENABLE HCI command completes.
6062 */
6063 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6064
6065 /* Set require_privacy to false so that the remote device has a
6066 * chance of identifying us.
6067 */
6068 status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6069 &own_addr_type);
6070 if (status)
6071 return status;
6072
6073 memset(&cp, 0, sizeof(cp));
6074
6075 /* Some controllers might reject command if intervals are not
6076 * within range for undirected advertising.
6077 * BCM20702A0 is known to be affected by this.
6078 */
6079 cp.min_interval = cpu_to_le16(0x0020);
6080 cp.max_interval = cpu_to_le16(0x0020);
6081
6082 cp.type = LE_ADV_DIRECT_IND;
6083 cp.own_address_type = own_addr_type;
6084 cp.direct_addr_type = conn->dst_type;
6085 bacpy(&cp.direct_addr, &conn->dst);
6086 cp.channel_map = hdev->le_adv_channel_map;
6087
6088 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
6089 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6090 if (status)
6091 return status;
6092
6093 enable = 0x01;
6094
6095 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
6096 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
6097}
6098
6099static void set_ext_conn_params(struct hci_conn *conn,
6100 struct hci_cp_le_ext_conn_param *p)
6101{
6102 struct hci_dev *hdev = conn->hdev;
6103
6104 memset(p, 0, sizeof(*p));
6105
6106 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6107 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6108 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6109 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6110 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
6111 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6112 p->min_ce_len = cpu_to_le16(0x0000);
6113 p->max_ce_len = cpu_to_le16(0x0000);
6114}
6115
6116static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
6117 struct hci_conn *conn, u8 own_addr_type)
6118{
6119 struct hci_cp_le_ext_create_conn *cp;
6120 struct hci_cp_le_ext_conn_param *p;
6121 u8 data[sizeof(*cp) + sizeof(*p) * 3];
6122 u32 plen;
6123
6124 cp = (void *)data;
6125 p = (void *)cp->data;
6126
6127 memset(cp, 0, sizeof(*cp));
6128
6129 bacpy(&cp->peer_addr, &conn->dst);
6130 cp->peer_addr_type = conn->dst_type;
6131 cp->own_addr_type = own_addr_type;
6132
6133 plen = sizeof(*cp);
6134
6135 if (scan_1m(hdev)) {
6136 cp->phys |= LE_SCAN_PHY_1M;
6137 set_ext_conn_params(conn, p);
6138
6139 p++;
6140 plen += sizeof(*p);
6141 }
6142
6143 if (scan_2m(hdev)) {
6144 cp->phys |= LE_SCAN_PHY_2M;
6145 set_ext_conn_params(conn, p);
6146
6147 p++;
6148 plen += sizeof(*p);
6149 }
6150
6151 if (scan_coded(hdev)) {
6152 cp->phys |= LE_SCAN_PHY_CODED;
6153 set_ext_conn_params(conn, p);
6154
6155 plen += sizeof(*p);
6156 }
6157
6158 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
6159 plen, data,
6160 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
6161 conn->conn_timeout, NULL);
6162}
6163
6164int hci_le_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn)
6165{
6166 struct hci_cp_le_create_conn cp;
6167 struct hci_conn_params *params;
6168 u8 own_addr_type;
6169 int err;
6170
6171 /* If requested to connect as peripheral use directed advertising */
6172 if (conn->role == HCI_ROLE_SLAVE) {
6173 /* If we're active scanning and simultaneous roles is not
6174 * enabled simply reject the attempt.
6175 */
6176 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
6177 hdev->le_scan_type == LE_SCAN_ACTIVE &&
6178 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
6179 hci_conn_del(conn);
6180 return -EBUSY;
6181 }
6182
6183 /* Pause advertising while doing directed advertising. */
6184 hci_pause_advertising_sync(hdev);
6185
6186 err = hci_le_directed_advertising_sync(hdev, conn);
6187 goto done;
6188 }
6189
6190 /* Disable advertising if simultaneous roles is not in use. */
6191 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
6192 hci_pause_advertising_sync(hdev);
6193
6194 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
6195 if (params) {
6196 conn->le_conn_min_interval = params->conn_min_interval;
6197 conn->le_conn_max_interval = params->conn_max_interval;
6198 conn->le_conn_latency = params->conn_latency;
6199 conn->le_supv_timeout = params->supervision_timeout;
6200 } else {
6201 conn->le_conn_min_interval = hdev->le_conn_min_interval;
6202 conn->le_conn_max_interval = hdev->le_conn_max_interval;
6203 conn->le_conn_latency = hdev->le_conn_latency;
6204 conn->le_supv_timeout = hdev->le_supv_timeout;
6205 }
6206
6207 /* If controller is scanning, we stop it since some controllers are
6208 * not able to scan and connect at the same time. Also set the
6209 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
6210 * handler for scan disabling knows to set the correct discovery
6211 * state.
6212 */
6213 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
6214 hci_scan_disable_sync(hdev);
6215 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
6216 }
6217
6218 /* Update random address, but set require_privacy to false so
6219 * that we never connect with an non-resolvable address.
6220 */
6221 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6222 &own_addr_type);
6223 if (err)
6224 goto done;
6225
6226 if (use_ext_conn(hdev)) {
6227 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
6228 goto done;
6229 }
6230
6231 memset(&cp, 0, sizeof(cp));
6232
6233 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6234 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6235
6236 bacpy(&cp.peer_addr, &conn->dst);
6237 cp.peer_addr_type = conn->dst_type;
6238 cp.own_address_type = own_addr_type;
6239 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6240 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6241 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
6242 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6243 cp.min_ce_len = cpu_to_le16(0x0000);
6244 cp.max_ce_len = cpu_to_le16(0x0000);
6245
6246 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
6247 *
6248 * If this event is unmasked and the HCI_LE_Connection_Complete event
6249 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
6250 * sent when a new connection has been created.
6251 */
6252 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
6253 sizeof(cp), &cp,
6254 use_enhanced_conn_complete(hdev) ?
6255 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
6256 HCI_EV_LE_CONN_COMPLETE,
6257 conn->conn_timeout, NULL);
6258
6259done:
6260 if (err == -ETIMEDOUT)
6261 hci_le_connect_cancel_sync(hdev, conn, 0x00);
6262
6263 /* Re-enable advertising after the connection attempt is finished. */
6264 hci_resume_advertising_sync(hdev);
6265 return err;
6266}
6267
6268int hci_le_create_cis_sync(struct hci_dev *hdev)
6269{
6270 struct {
6271 struct hci_cp_le_create_cis cp;
6272 struct hci_cis cis[0x1f];
6273 } cmd;
6274 struct hci_conn *conn;
6275 u8 cig = BT_ISO_QOS_CIG_UNSET;
6276
6277 /* The spec allows only one pending LE Create CIS command at a time. If
6278 * the command is pending now, don't do anything. We check for pending
6279 * connections after each CIS Established event.
6280 *
6281 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6282 * page 2566:
6283 *
6284 * If the Host issues this command before all the
6285 * HCI_LE_CIS_Established events from the previous use of the
6286 * command have been generated, the Controller shall return the
6287 * error code Command Disallowed (0x0C).
6288 *
6289 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6290 * page 2567:
6291 *
6292 * When the Controller receives the HCI_LE_Create_CIS command, the
6293 * Controller sends the HCI_Command_Status event to the Host. An
6294 * HCI_LE_CIS_Established event will be generated for each CIS when it
6295 * is established or if it is disconnected or considered lost before
6296 * being established; until all the events are generated, the command
6297 * remains pending.
6298 */
6299
6300 memset(&cmd, 0, sizeof(cmd));
6301
6302 hci_dev_lock(hdev);
6303
6304 rcu_read_lock();
6305
6306 /* Wait until previous Create CIS has completed */
6307 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6308 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
6309 goto done;
6310 }
6311
6312 /* Find CIG with all CIS ready */
6313 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6314 struct hci_conn *link;
6315
6316 if (hci_conn_check_create_cis(conn))
6317 continue;
6318
6319 cig = conn->iso_qos.ucast.cig;
6320
6321 list_for_each_entry_rcu(link, &hdev->conn_hash.list, list) {
6322 if (hci_conn_check_create_cis(link) > 0 &&
6323 link->iso_qos.ucast.cig == cig &&
6324 link->state != BT_CONNECTED) {
6325 cig = BT_ISO_QOS_CIG_UNSET;
6326 break;
6327 }
6328 }
6329
6330 if (cig != BT_ISO_QOS_CIG_UNSET)
6331 break;
6332 }
6333
6334 if (cig == BT_ISO_QOS_CIG_UNSET)
6335 goto done;
6336
6337 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6338 struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis];
6339
6340 if (hci_conn_check_create_cis(conn) ||
6341 conn->iso_qos.ucast.cig != cig)
6342 continue;
6343
6344 set_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6345 cis->acl_handle = cpu_to_le16(conn->parent->handle);
6346 cis->cis_handle = cpu_to_le16(conn->handle);
6347 cmd.cp.num_cis++;
6348
6349 if (cmd.cp.num_cis >= ARRAY_SIZE(cmd.cis))
6350 break;
6351 }
6352
6353done:
6354 rcu_read_unlock();
6355
6356 hci_dev_unlock(hdev);
6357
6358 if (!cmd.cp.num_cis)
6359 return 0;
6360
6361 /* Wait for HCI_LE_CIS_Established */
6362 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CIS,
6363 sizeof(cmd.cp) + sizeof(cmd.cis[0]) *
6364 cmd.cp.num_cis, &cmd,
6365 HCI_EVT_LE_CIS_ESTABLISHED,
6366 conn->conn_timeout, NULL);
6367}
6368
6369int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle)
6370{
6371 struct hci_cp_le_remove_cig cp;
6372
6373 memset(&cp, 0, sizeof(cp));
6374 cp.cig_id = handle;
6375
6376 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp),
6377 &cp, HCI_CMD_TIMEOUT);
6378}
6379
6380int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle)
6381{
6382 struct hci_cp_le_big_term_sync cp;
6383
6384 memset(&cp, 0, sizeof(cp));
6385 cp.handle = handle;
6386
6387 return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC,
6388 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6389}
6390
6391int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
6392{
6393 struct hci_cp_le_pa_term_sync cp;
6394
6395 memset(&cp, 0, sizeof(cp));
6396 cp.handle = cpu_to_le16(handle);
6397
6398 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
6399 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6400}
6401
6402int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
6403 bool use_rpa, struct adv_info *adv_instance,
6404 u8 *own_addr_type, bdaddr_t *rand_addr)
6405{
6406 int err;
6407
6408 bacpy(rand_addr, BDADDR_ANY);
6409
6410 /* If privacy is enabled use a resolvable private address. If
6411 * current RPA has expired then generate a new one.
6412 */
6413 if (use_rpa) {
6414 /* If Controller supports LL Privacy use own address type is
6415 * 0x03
6416 */
6417 if (use_ll_privacy(hdev))
6418 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
6419 else
6420 *own_addr_type = ADDR_LE_DEV_RANDOM;
6421
6422 if (adv_instance) {
6423 if (adv_rpa_valid(adv_instance))
6424 return 0;
6425 } else {
6426 if (rpa_valid(hdev))
6427 return 0;
6428 }
6429
6430 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
6431 if (err < 0) {
6432 bt_dev_err(hdev, "failed to generate new RPA");
6433 return err;
6434 }
6435
6436 bacpy(rand_addr, &hdev->rpa);
6437
6438 return 0;
6439 }
6440
6441 /* In case of required privacy without resolvable private address,
6442 * use an non-resolvable private address. This is useful for
6443 * non-connectable advertising.
6444 */
6445 if (require_privacy) {
6446 bdaddr_t nrpa;
6447
6448 while (true) {
6449 /* The non-resolvable private address is generated
6450 * from random six bytes with the two most significant
6451 * bits cleared.
6452 */
6453 get_random_bytes(&nrpa, 6);
6454 nrpa.b[5] &= 0x3f;
6455
6456 /* The non-resolvable private address shall not be
6457 * equal to the public address.
6458 */
6459 if (bacmp(&hdev->bdaddr, &nrpa))
6460 break;
6461 }
6462
6463 *own_addr_type = ADDR_LE_DEV_RANDOM;
6464 bacpy(rand_addr, &nrpa);
6465
6466 return 0;
6467 }
6468
6469 /* No privacy so use a public address. */
6470 *own_addr_type = ADDR_LE_DEV_PUBLIC;
6471
6472 return 0;
6473}
6474
6475static int _update_adv_data_sync(struct hci_dev *hdev, void *data)
6476{
6477 u8 instance = PTR_UINT(data);
6478
6479 return hci_update_adv_data_sync(hdev, instance);
6480}
6481
6482int hci_update_adv_data(struct hci_dev *hdev, u8 instance)
6483{
6484 return hci_cmd_sync_queue(hdev, _update_adv_data_sync,
6485 UINT_PTR(instance), NULL);
6486}
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_request.h"
16#include "hci_codec.h"
17#include "hci_debugfs.h"
18#include "smp.h"
19#include "eir.h"
20#include "msft.h"
21#include "aosp.h"
22#include "leds.h"
23
24static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
25 struct sk_buff *skb)
26{
27 bt_dev_dbg(hdev, "result 0x%2.2x", result);
28
29 if (hdev->req_status != HCI_REQ_PEND)
30 return;
31
32 hdev->req_result = result;
33 hdev->req_status = HCI_REQ_DONE;
34
35 /* Free the request command so it is not used as response */
36 kfree_skb(hdev->req_skb);
37 hdev->req_skb = NULL;
38
39 if (skb) {
40 struct sock *sk = hci_skb_sk(skb);
41
42 /* Drop sk reference if set */
43 if (sk)
44 sock_put(sk);
45
46 hdev->req_rsp = skb_get(skb);
47 }
48
49 wake_up_interruptible(&hdev->req_wait_q);
50}
51
52static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode,
53 u32 plen, const void *param,
54 struct sock *sk)
55{
56 int len = HCI_COMMAND_HDR_SIZE + plen;
57 struct hci_command_hdr *hdr;
58 struct sk_buff *skb;
59
60 skb = bt_skb_alloc(len, GFP_ATOMIC);
61 if (!skb)
62 return NULL;
63
64 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
65 hdr->opcode = cpu_to_le16(opcode);
66 hdr->plen = plen;
67
68 if (plen)
69 skb_put_data(skb, param, plen);
70
71 bt_dev_dbg(hdev, "skb len %d", skb->len);
72
73 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
74 hci_skb_opcode(skb) = opcode;
75
76 /* Grab a reference if command needs to be associated with a sock (e.g.
77 * likely mgmt socket that initiated the command).
78 */
79 if (sk) {
80 hci_skb_sk(skb) = sk;
81 sock_hold(sk);
82 }
83
84 return skb;
85}
86
87static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
88 const void *param, u8 event, struct sock *sk)
89{
90 struct hci_dev *hdev = req->hdev;
91 struct sk_buff *skb;
92
93 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
94
95 /* If an error occurred during request building, there is no point in
96 * queueing the HCI command. We can simply return.
97 */
98 if (req->err)
99 return;
100
101 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
102 if (!skb) {
103 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
104 opcode);
105 req->err = -ENOMEM;
106 return;
107 }
108
109 if (skb_queue_empty(&req->cmd_q))
110 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
111
112 hci_skb_event(skb) = event;
113
114 skb_queue_tail(&req->cmd_q, skb);
115}
116
117static int hci_cmd_sync_run(struct hci_request *req)
118{
119 struct hci_dev *hdev = req->hdev;
120 struct sk_buff *skb;
121 unsigned long flags;
122
123 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
124
125 /* If an error occurred during request building, remove all HCI
126 * commands queued on the HCI request queue.
127 */
128 if (req->err) {
129 skb_queue_purge(&req->cmd_q);
130 return req->err;
131 }
132
133 /* Do not allow empty requests */
134 if (skb_queue_empty(&req->cmd_q))
135 return -ENODATA;
136
137 skb = skb_peek_tail(&req->cmd_q);
138 bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
139 bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
140
141 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
142 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
143 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
144
145 queue_work(hdev->workqueue, &hdev->cmd_work);
146
147 return 0;
148}
149
150/* This function requires the caller holds hdev->req_lock. */
151struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
152 const void *param, u8 event, u32 timeout,
153 struct sock *sk)
154{
155 struct hci_request req;
156 struct sk_buff *skb;
157 int err = 0;
158
159 bt_dev_dbg(hdev, "Opcode 0x%4.4x", opcode);
160
161 hci_req_init(&req, hdev);
162
163 hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
164
165 hdev->req_status = HCI_REQ_PEND;
166
167 err = hci_cmd_sync_run(&req);
168 if (err < 0)
169 return ERR_PTR(err);
170
171 err = wait_event_interruptible_timeout(hdev->req_wait_q,
172 hdev->req_status != HCI_REQ_PEND,
173 timeout);
174
175 if (err == -ERESTARTSYS)
176 return ERR_PTR(-EINTR);
177
178 switch (hdev->req_status) {
179 case HCI_REQ_DONE:
180 err = -bt_to_errno(hdev->req_result);
181 break;
182
183 case HCI_REQ_CANCELED:
184 err = -hdev->req_result;
185 break;
186
187 default:
188 err = -ETIMEDOUT;
189 break;
190 }
191
192 hdev->req_status = 0;
193 hdev->req_result = 0;
194 skb = hdev->req_rsp;
195 hdev->req_rsp = NULL;
196
197 bt_dev_dbg(hdev, "end: err %d", err);
198
199 if (err < 0) {
200 kfree_skb(skb);
201 return ERR_PTR(err);
202 }
203
204 return skb;
205}
206EXPORT_SYMBOL(__hci_cmd_sync_sk);
207
208/* This function requires the caller holds hdev->req_lock. */
209struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
210 const void *param, u32 timeout)
211{
212 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
213}
214EXPORT_SYMBOL(__hci_cmd_sync);
215
216/* Send HCI command and wait for command complete event */
217struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
218 const void *param, u32 timeout)
219{
220 struct sk_buff *skb;
221
222 if (!test_bit(HCI_UP, &hdev->flags))
223 return ERR_PTR(-ENETDOWN);
224
225 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
226
227 hci_req_sync_lock(hdev);
228 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
229 hci_req_sync_unlock(hdev);
230
231 return skb;
232}
233EXPORT_SYMBOL(hci_cmd_sync);
234
235/* This function requires the caller holds hdev->req_lock. */
236struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
237 const void *param, u8 event, u32 timeout)
238{
239 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
240 NULL);
241}
242EXPORT_SYMBOL(__hci_cmd_sync_ev);
243
244/* This function requires the caller holds hdev->req_lock. */
245int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
246 const void *param, u8 event, u32 timeout,
247 struct sock *sk)
248{
249 struct sk_buff *skb;
250 u8 status;
251
252 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
253 if (IS_ERR(skb)) {
254 if (!event)
255 bt_dev_err(hdev, "Opcode 0x%4.4x failed: %ld", opcode,
256 PTR_ERR(skb));
257 return PTR_ERR(skb);
258 }
259
260 /* If command return a status event skb will be set to NULL as there are
261 * no parameters, in case of failure IS_ERR(skb) would have be set to
262 * the actual error would be found with PTR_ERR(skb).
263 */
264 if (!skb)
265 return 0;
266
267 status = skb->data[0];
268
269 kfree_skb(skb);
270
271 return status;
272}
273EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
274
275int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
276 const void *param, u32 timeout)
277{
278 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
279 NULL);
280}
281EXPORT_SYMBOL(__hci_cmd_sync_status);
282
283static void hci_cmd_sync_work(struct work_struct *work)
284{
285 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
286
287 bt_dev_dbg(hdev, "");
288
289 /* Dequeue all entries and run them */
290 while (1) {
291 struct hci_cmd_sync_work_entry *entry;
292
293 mutex_lock(&hdev->cmd_sync_work_lock);
294 entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
295 struct hci_cmd_sync_work_entry,
296 list);
297 if (entry)
298 list_del(&entry->list);
299 mutex_unlock(&hdev->cmd_sync_work_lock);
300
301 if (!entry)
302 break;
303
304 bt_dev_dbg(hdev, "entry %p", entry);
305
306 if (entry->func) {
307 int err;
308
309 hci_req_sync_lock(hdev);
310 err = entry->func(hdev, entry->data);
311 if (entry->destroy)
312 entry->destroy(hdev, entry->data, err);
313 hci_req_sync_unlock(hdev);
314 }
315
316 kfree(entry);
317 }
318}
319
320static void hci_cmd_sync_cancel_work(struct work_struct *work)
321{
322 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
323
324 cancel_delayed_work_sync(&hdev->cmd_timer);
325 cancel_delayed_work_sync(&hdev->ncmd_timer);
326 atomic_set(&hdev->cmd_cnt, 1);
327
328 wake_up_interruptible(&hdev->req_wait_q);
329}
330
331static int hci_scan_disable_sync(struct hci_dev *hdev);
332static int scan_disable_sync(struct hci_dev *hdev, void *data)
333{
334 return hci_scan_disable_sync(hdev);
335}
336
337static int hci_inquiry_sync(struct hci_dev *hdev, u8 length);
338static int interleaved_inquiry_sync(struct hci_dev *hdev, void *data)
339{
340 return hci_inquiry_sync(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN);
341}
342
343static void le_scan_disable(struct work_struct *work)
344{
345 struct hci_dev *hdev = container_of(work, struct hci_dev,
346 le_scan_disable.work);
347 int status;
348
349 bt_dev_dbg(hdev, "");
350 hci_dev_lock(hdev);
351
352 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
353 goto _return;
354
355 status = hci_cmd_sync_queue(hdev, scan_disable_sync, NULL, NULL);
356 if (status) {
357 bt_dev_err(hdev, "failed to disable LE scan: %d", status);
358 goto _return;
359 }
360
361 hdev->discovery.scan_start = 0;
362
363 /* If we were running LE only scan, change discovery state. If
364 * we were running both LE and BR/EDR inquiry simultaneously,
365 * and BR/EDR inquiry is already finished, stop discovery,
366 * otherwise BR/EDR inquiry will stop discovery when finished.
367 * If we will resolve remote device name, do not change
368 * discovery state.
369 */
370
371 if (hdev->discovery.type == DISCOV_TYPE_LE)
372 goto discov_stopped;
373
374 if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED)
375 goto _return;
376
377 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) {
378 if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
379 hdev->discovery.state != DISCOVERY_RESOLVING)
380 goto discov_stopped;
381
382 goto _return;
383 }
384
385 status = hci_cmd_sync_queue(hdev, interleaved_inquiry_sync, NULL, NULL);
386 if (status) {
387 bt_dev_err(hdev, "inquiry failed: status %d", status);
388 goto discov_stopped;
389 }
390
391 goto _return;
392
393discov_stopped:
394 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
395
396_return:
397 hci_dev_unlock(hdev);
398}
399
400static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
401 u8 filter_dup);
402
403static int reenable_adv_sync(struct hci_dev *hdev, void *data)
404{
405 bt_dev_dbg(hdev, "");
406
407 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
408 list_empty(&hdev->adv_instances))
409 return 0;
410
411 if (hdev->cur_adv_instance) {
412 return hci_schedule_adv_instance_sync(hdev,
413 hdev->cur_adv_instance,
414 true);
415 } else {
416 if (ext_adv_capable(hdev)) {
417 hci_start_ext_adv_sync(hdev, 0x00);
418 } else {
419 hci_update_adv_data_sync(hdev, 0x00);
420 hci_update_scan_rsp_data_sync(hdev, 0x00);
421 hci_enable_advertising_sync(hdev);
422 }
423 }
424
425 return 0;
426}
427
428static void reenable_adv(struct work_struct *work)
429{
430 struct hci_dev *hdev = container_of(work, struct hci_dev,
431 reenable_adv_work);
432 int status;
433
434 bt_dev_dbg(hdev, "");
435
436 hci_dev_lock(hdev);
437
438 status = hci_cmd_sync_queue(hdev, reenable_adv_sync, NULL, NULL);
439 if (status)
440 bt_dev_err(hdev, "failed to reenable ADV: %d", status);
441
442 hci_dev_unlock(hdev);
443}
444
445static void cancel_adv_timeout(struct hci_dev *hdev)
446{
447 if (hdev->adv_instance_timeout) {
448 hdev->adv_instance_timeout = 0;
449 cancel_delayed_work(&hdev->adv_instance_expire);
450 }
451}
452
453/* For a single instance:
454 * - force == true: The instance will be removed even when its remaining
455 * lifetime is not zero.
456 * - force == false: the instance will be deactivated but kept stored unless
457 * the remaining lifetime is zero.
458 *
459 * For instance == 0x00:
460 * - force == true: All instances will be removed regardless of their timeout
461 * setting.
462 * - force == false: Only instances that have a timeout will be removed.
463 */
464int hci_clear_adv_instance_sync(struct hci_dev *hdev, struct sock *sk,
465 u8 instance, bool force)
466{
467 struct adv_info *adv_instance, *n, *next_instance = NULL;
468 int err;
469 u8 rem_inst;
470
471 /* Cancel any timeout concerning the removed instance(s). */
472 if (!instance || hdev->cur_adv_instance == instance)
473 cancel_adv_timeout(hdev);
474
475 /* Get the next instance to advertise BEFORE we remove
476 * the current one. This can be the same instance again
477 * if there is only one instance.
478 */
479 if (instance && hdev->cur_adv_instance == instance)
480 next_instance = hci_get_next_instance(hdev, instance);
481
482 if (instance == 0x00) {
483 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances,
484 list) {
485 if (!(force || adv_instance->timeout))
486 continue;
487
488 rem_inst = adv_instance->instance;
489 err = hci_remove_adv_instance(hdev, rem_inst);
490 if (!err)
491 mgmt_advertising_removed(sk, hdev, rem_inst);
492 }
493 } else {
494 adv_instance = hci_find_adv_instance(hdev, instance);
495
496 if (force || (adv_instance && adv_instance->timeout &&
497 !adv_instance->remaining_time)) {
498 /* Don't advertise a removed instance. */
499 if (next_instance &&
500 next_instance->instance == instance)
501 next_instance = NULL;
502
503 err = hci_remove_adv_instance(hdev, instance);
504 if (!err)
505 mgmt_advertising_removed(sk, hdev, instance);
506 }
507 }
508
509 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
510 return 0;
511
512 if (next_instance && !ext_adv_capable(hdev))
513 return hci_schedule_adv_instance_sync(hdev,
514 next_instance->instance,
515 false);
516
517 return 0;
518}
519
520static int adv_timeout_expire_sync(struct hci_dev *hdev, void *data)
521{
522 u8 instance = *(u8 *)data;
523
524 kfree(data);
525
526 hci_clear_adv_instance_sync(hdev, NULL, instance, false);
527
528 if (list_empty(&hdev->adv_instances))
529 return hci_disable_advertising_sync(hdev);
530
531 return 0;
532}
533
534static void adv_timeout_expire(struct work_struct *work)
535{
536 u8 *inst_ptr;
537 struct hci_dev *hdev = container_of(work, struct hci_dev,
538 adv_instance_expire.work);
539
540 bt_dev_dbg(hdev, "");
541
542 hci_dev_lock(hdev);
543
544 hdev->adv_instance_timeout = 0;
545
546 if (hdev->cur_adv_instance == 0x00)
547 goto unlock;
548
549 inst_ptr = kmalloc(1, GFP_KERNEL);
550 if (!inst_ptr)
551 goto unlock;
552
553 *inst_ptr = hdev->cur_adv_instance;
554 hci_cmd_sync_queue(hdev, adv_timeout_expire_sync, inst_ptr, NULL);
555
556unlock:
557 hci_dev_unlock(hdev);
558}
559
560void hci_cmd_sync_init(struct hci_dev *hdev)
561{
562 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
563 INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
564 mutex_init(&hdev->cmd_sync_work_lock);
565 mutex_init(&hdev->unregister_lock);
566
567 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
568 INIT_WORK(&hdev->reenable_adv_work, reenable_adv);
569 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable);
570 INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
571}
572
573static void _hci_cmd_sync_cancel_entry(struct hci_dev *hdev,
574 struct hci_cmd_sync_work_entry *entry,
575 int err)
576{
577 if (entry->destroy)
578 entry->destroy(hdev, entry->data, err);
579
580 list_del(&entry->list);
581 kfree(entry);
582}
583
584void hci_cmd_sync_clear(struct hci_dev *hdev)
585{
586 struct hci_cmd_sync_work_entry *entry, *tmp;
587
588 cancel_work_sync(&hdev->cmd_sync_work);
589 cancel_work_sync(&hdev->reenable_adv_work);
590
591 mutex_lock(&hdev->cmd_sync_work_lock);
592 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list)
593 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
594 mutex_unlock(&hdev->cmd_sync_work_lock);
595}
596
597void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
598{
599 bt_dev_dbg(hdev, "err 0x%2.2x", err);
600
601 if (hdev->req_status == HCI_REQ_PEND) {
602 hdev->req_result = err;
603 hdev->req_status = HCI_REQ_CANCELED;
604
605 queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
606 }
607}
608EXPORT_SYMBOL(hci_cmd_sync_cancel);
609
610/* Cancel ongoing command request synchronously:
611 *
612 * - Set result and mark status to HCI_REQ_CANCELED
613 * - Wakeup command sync thread
614 */
615void hci_cmd_sync_cancel_sync(struct hci_dev *hdev, int err)
616{
617 bt_dev_dbg(hdev, "err 0x%2.2x", err);
618
619 if (hdev->req_status == HCI_REQ_PEND) {
620 /* req_result is __u32 so error must be positive to be properly
621 * propagated.
622 */
623 hdev->req_result = err < 0 ? -err : err;
624 hdev->req_status = HCI_REQ_CANCELED;
625
626 wake_up_interruptible(&hdev->req_wait_q);
627 }
628}
629EXPORT_SYMBOL(hci_cmd_sync_cancel_sync);
630
631/* Submit HCI command to be run in as cmd_sync_work:
632 *
633 * - hdev must _not_ be unregistered
634 */
635int hci_cmd_sync_submit(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
636 void *data, hci_cmd_sync_work_destroy_t destroy)
637{
638 struct hci_cmd_sync_work_entry *entry;
639 int err = 0;
640
641 mutex_lock(&hdev->unregister_lock);
642 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
643 err = -ENODEV;
644 goto unlock;
645 }
646
647 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
648 if (!entry) {
649 err = -ENOMEM;
650 goto unlock;
651 }
652 entry->func = func;
653 entry->data = data;
654 entry->destroy = destroy;
655
656 mutex_lock(&hdev->cmd_sync_work_lock);
657 list_add_tail(&entry->list, &hdev->cmd_sync_work_list);
658 mutex_unlock(&hdev->cmd_sync_work_lock);
659
660 queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
661
662unlock:
663 mutex_unlock(&hdev->unregister_lock);
664 return err;
665}
666EXPORT_SYMBOL(hci_cmd_sync_submit);
667
668/* Queue HCI command:
669 *
670 * - hdev must be running
671 */
672int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
673 void *data, hci_cmd_sync_work_destroy_t destroy)
674{
675 /* Only queue command if hdev is running which means it had been opened
676 * and is either on init phase or is already up.
677 */
678 if (!test_bit(HCI_RUNNING, &hdev->flags))
679 return -ENETDOWN;
680
681 return hci_cmd_sync_submit(hdev, func, data, destroy);
682}
683EXPORT_SYMBOL(hci_cmd_sync_queue);
684
685static struct hci_cmd_sync_work_entry *
686_hci_cmd_sync_lookup_entry(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
687 void *data, hci_cmd_sync_work_destroy_t destroy)
688{
689 struct hci_cmd_sync_work_entry *entry, *tmp;
690
691 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
692 if (func && entry->func != func)
693 continue;
694
695 if (data && entry->data != data)
696 continue;
697
698 if (destroy && entry->destroy != destroy)
699 continue;
700
701 return entry;
702 }
703
704 return NULL;
705}
706
707/* Queue HCI command entry once:
708 *
709 * - Lookup if an entry already exist and only if it doesn't creates a new entry
710 * and queue it.
711 */
712int hci_cmd_sync_queue_once(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
713 void *data, hci_cmd_sync_work_destroy_t destroy)
714{
715 if (hci_cmd_sync_lookup_entry(hdev, func, data, destroy))
716 return 0;
717
718 return hci_cmd_sync_queue(hdev, func, data, destroy);
719}
720EXPORT_SYMBOL(hci_cmd_sync_queue_once);
721
722/* Lookup HCI command entry:
723 *
724 * - Return first entry that matches by function callback or data or
725 * destroy callback.
726 */
727struct hci_cmd_sync_work_entry *
728hci_cmd_sync_lookup_entry(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
729 void *data, hci_cmd_sync_work_destroy_t destroy)
730{
731 struct hci_cmd_sync_work_entry *entry;
732
733 mutex_lock(&hdev->cmd_sync_work_lock);
734 entry = _hci_cmd_sync_lookup_entry(hdev, func, data, destroy);
735 mutex_unlock(&hdev->cmd_sync_work_lock);
736
737 return entry;
738}
739EXPORT_SYMBOL(hci_cmd_sync_lookup_entry);
740
741/* Cancel HCI command entry */
742void hci_cmd_sync_cancel_entry(struct hci_dev *hdev,
743 struct hci_cmd_sync_work_entry *entry)
744{
745 mutex_lock(&hdev->cmd_sync_work_lock);
746 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
747 mutex_unlock(&hdev->cmd_sync_work_lock);
748}
749EXPORT_SYMBOL(hci_cmd_sync_cancel_entry);
750
751/* Dequeue one HCI command entry:
752 *
753 * - Lookup and cancel first entry that matches.
754 */
755bool hci_cmd_sync_dequeue_once(struct hci_dev *hdev,
756 hci_cmd_sync_work_func_t func,
757 void *data, hci_cmd_sync_work_destroy_t destroy)
758{
759 struct hci_cmd_sync_work_entry *entry;
760
761 entry = hci_cmd_sync_lookup_entry(hdev, func, data, destroy);
762 if (!entry)
763 return false;
764
765 hci_cmd_sync_cancel_entry(hdev, entry);
766
767 return true;
768}
769EXPORT_SYMBOL(hci_cmd_sync_dequeue_once);
770
771/* Dequeue HCI command entry:
772 *
773 * - Lookup and cancel any entry that matches by function callback or data or
774 * destroy callback.
775 */
776bool hci_cmd_sync_dequeue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
777 void *data, hci_cmd_sync_work_destroy_t destroy)
778{
779 struct hci_cmd_sync_work_entry *entry;
780 bool ret = false;
781
782 mutex_lock(&hdev->cmd_sync_work_lock);
783 while ((entry = _hci_cmd_sync_lookup_entry(hdev, func, data,
784 destroy))) {
785 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
786 ret = true;
787 }
788 mutex_unlock(&hdev->cmd_sync_work_lock);
789
790 return ret;
791}
792EXPORT_SYMBOL(hci_cmd_sync_dequeue);
793
794int hci_update_eir_sync(struct hci_dev *hdev)
795{
796 struct hci_cp_write_eir cp;
797
798 bt_dev_dbg(hdev, "");
799
800 if (!hdev_is_powered(hdev))
801 return 0;
802
803 if (!lmp_ext_inq_capable(hdev))
804 return 0;
805
806 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
807 return 0;
808
809 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
810 return 0;
811
812 memset(&cp, 0, sizeof(cp));
813
814 eir_create(hdev, cp.data);
815
816 if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
817 return 0;
818
819 memcpy(hdev->eir, cp.data, sizeof(cp.data));
820
821 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
822 HCI_CMD_TIMEOUT);
823}
824
825static u8 get_service_classes(struct hci_dev *hdev)
826{
827 struct bt_uuid *uuid;
828 u8 val = 0;
829
830 list_for_each_entry(uuid, &hdev->uuids, list)
831 val |= uuid->svc_hint;
832
833 return val;
834}
835
836int hci_update_class_sync(struct hci_dev *hdev)
837{
838 u8 cod[3];
839
840 bt_dev_dbg(hdev, "");
841
842 if (!hdev_is_powered(hdev))
843 return 0;
844
845 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
846 return 0;
847
848 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
849 return 0;
850
851 cod[0] = hdev->minor_class;
852 cod[1] = hdev->major_class;
853 cod[2] = get_service_classes(hdev);
854
855 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
856 cod[1] |= 0x20;
857
858 if (memcmp(cod, hdev->dev_class, 3) == 0)
859 return 0;
860
861 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
862 sizeof(cod), cod, HCI_CMD_TIMEOUT);
863}
864
865static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
866{
867 /* If there is no connection we are OK to advertise. */
868 if (hci_conn_num(hdev, LE_LINK) == 0)
869 return true;
870
871 /* Check le_states if there is any connection in peripheral role. */
872 if (hdev->conn_hash.le_num_peripheral > 0) {
873 /* Peripheral connection state and non connectable mode
874 * bit 20.
875 */
876 if (!connectable && !(hdev->le_states[2] & 0x10))
877 return false;
878
879 /* Peripheral connection state and connectable mode bit 38
880 * and scannable bit 21.
881 */
882 if (connectable && (!(hdev->le_states[4] & 0x40) ||
883 !(hdev->le_states[2] & 0x20)))
884 return false;
885 }
886
887 /* Check le_states if there is any connection in central role. */
888 if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
889 /* Central connection state and non connectable mode bit 18. */
890 if (!connectable && !(hdev->le_states[2] & 0x02))
891 return false;
892
893 /* Central connection state and connectable mode bit 35 and
894 * scannable 19.
895 */
896 if (connectable && (!(hdev->le_states[4] & 0x08) ||
897 !(hdev->le_states[2] & 0x08)))
898 return false;
899 }
900
901 return true;
902}
903
904static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
905{
906 /* If privacy is not enabled don't use RPA */
907 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
908 return false;
909
910 /* If basic privacy mode is enabled use RPA */
911 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
912 return true;
913
914 /* If limited privacy mode is enabled don't use RPA if we're
915 * both discoverable and bondable.
916 */
917 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
918 hci_dev_test_flag(hdev, HCI_BONDABLE))
919 return false;
920
921 /* We're neither bondable nor discoverable in the limited
922 * privacy mode, therefore use RPA.
923 */
924 return true;
925}
926
927static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
928{
929 /* If we're advertising or initiating an LE connection we can't
930 * go ahead and change the random address at this time. This is
931 * because the eventual initiator address used for the
932 * subsequently created connection will be undefined (some
933 * controllers use the new address and others the one we had
934 * when the operation started).
935 *
936 * In this kind of scenario skip the update and let the random
937 * address be updated at the next cycle.
938 */
939 if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
940 hci_lookup_le_connect(hdev)) {
941 bt_dev_dbg(hdev, "Deferring random address update");
942 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
943 return 0;
944 }
945
946 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
947 6, rpa, HCI_CMD_TIMEOUT);
948}
949
950int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
951 bool rpa, u8 *own_addr_type)
952{
953 int err;
954
955 /* If privacy is enabled use a resolvable private address. If
956 * current RPA has expired or there is something else than
957 * the current RPA in use, then generate a new one.
958 */
959 if (rpa) {
960 /* If Controller supports LL Privacy use own address type is
961 * 0x03
962 */
963 if (use_ll_privacy(hdev))
964 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
965 else
966 *own_addr_type = ADDR_LE_DEV_RANDOM;
967
968 /* Check if RPA is valid */
969 if (rpa_valid(hdev))
970 return 0;
971
972 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
973 if (err < 0) {
974 bt_dev_err(hdev, "failed to generate new RPA");
975 return err;
976 }
977
978 err = hci_set_random_addr_sync(hdev, &hdev->rpa);
979 if (err)
980 return err;
981
982 return 0;
983 }
984
985 /* In case of required privacy without resolvable private address,
986 * use an non-resolvable private address. This is useful for active
987 * scanning and non-connectable advertising.
988 */
989 if (require_privacy) {
990 bdaddr_t nrpa;
991
992 while (true) {
993 /* The non-resolvable private address is generated
994 * from random six bytes with the two most significant
995 * bits cleared.
996 */
997 get_random_bytes(&nrpa, 6);
998 nrpa.b[5] &= 0x3f;
999
1000 /* The non-resolvable private address shall not be
1001 * equal to the public address.
1002 */
1003 if (bacmp(&hdev->bdaddr, &nrpa))
1004 break;
1005 }
1006
1007 *own_addr_type = ADDR_LE_DEV_RANDOM;
1008
1009 return hci_set_random_addr_sync(hdev, &nrpa);
1010 }
1011
1012 /* If forcing static address is in use or there is no public
1013 * address use the static address as random address (but skip
1014 * the HCI command if the current random address is already the
1015 * static one.
1016 *
1017 * In case BR/EDR has been disabled on a dual-mode controller
1018 * and a static address has been configured, then use that
1019 * address instead of the public BR/EDR address.
1020 */
1021 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
1022 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
1023 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
1024 bacmp(&hdev->static_addr, BDADDR_ANY))) {
1025 *own_addr_type = ADDR_LE_DEV_RANDOM;
1026 if (bacmp(&hdev->static_addr, &hdev->random_addr))
1027 return hci_set_random_addr_sync(hdev,
1028 &hdev->static_addr);
1029 return 0;
1030 }
1031
1032 /* Neither privacy nor static address is being used so use a
1033 * public address.
1034 */
1035 *own_addr_type = ADDR_LE_DEV_PUBLIC;
1036
1037 return 0;
1038}
1039
1040static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1041{
1042 struct hci_cp_le_set_ext_adv_enable *cp;
1043 struct hci_cp_ext_adv_set *set;
1044 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1045 u8 size;
1046 struct adv_info *adv = NULL;
1047
1048 /* If request specifies an instance that doesn't exist, fail */
1049 if (instance > 0) {
1050 adv = hci_find_adv_instance(hdev, instance);
1051 if (!adv)
1052 return -EINVAL;
1053
1054 /* If not enabled there is nothing to do */
1055 if (!adv->enabled)
1056 return 0;
1057 }
1058
1059 memset(data, 0, sizeof(data));
1060
1061 cp = (void *)data;
1062 set = (void *)cp->data;
1063
1064 /* Instance 0x00 indicates all advertising instances will be disabled */
1065 cp->num_of_sets = !!instance;
1066 cp->enable = 0x00;
1067
1068 set->handle = adv ? adv->handle : instance;
1069
1070 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
1071
1072 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1073 size, data, HCI_CMD_TIMEOUT);
1074}
1075
1076static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
1077 bdaddr_t *random_addr)
1078{
1079 struct hci_cp_le_set_adv_set_rand_addr cp;
1080 int err;
1081
1082 if (!instance) {
1083 /* Instance 0x00 doesn't have an adv_info, instead it uses
1084 * hdev->random_addr to track its address so whenever it needs
1085 * to be updated this also set the random address since
1086 * hdev->random_addr is shared with scan state machine.
1087 */
1088 err = hci_set_random_addr_sync(hdev, random_addr);
1089 if (err)
1090 return err;
1091 }
1092
1093 memset(&cp, 0, sizeof(cp));
1094
1095 cp.handle = instance;
1096 bacpy(&cp.bdaddr, random_addr);
1097
1098 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
1099 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1100}
1101
1102int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1103{
1104 struct hci_cp_le_set_ext_adv_params cp;
1105 bool connectable;
1106 u32 flags;
1107 bdaddr_t random_addr;
1108 u8 own_addr_type;
1109 int err;
1110 struct adv_info *adv;
1111 bool secondary_adv;
1112
1113 if (instance > 0) {
1114 adv = hci_find_adv_instance(hdev, instance);
1115 if (!adv)
1116 return -EINVAL;
1117 } else {
1118 adv = NULL;
1119 }
1120
1121 /* Updating parameters of an active instance will return a
1122 * Command Disallowed error, so we must first disable the
1123 * instance if it is active.
1124 */
1125 if (adv && !adv->pending) {
1126 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1127 if (err)
1128 return err;
1129 }
1130
1131 flags = hci_adv_instance_flags(hdev, instance);
1132
1133 /* If the "connectable" instance flag was not set, then choose between
1134 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1135 */
1136 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1137 mgmt_get_connectable(hdev);
1138
1139 if (!is_advertising_allowed(hdev, connectable))
1140 return -EPERM;
1141
1142 /* Set require_privacy to true only when non-connectable
1143 * advertising is used. In that case it is fine to use a
1144 * non-resolvable private address.
1145 */
1146 err = hci_get_random_address(hdev, !connectable,
1147 adv_use_rpa(hdev, flags), adv,
1148 &own_addr_type, &random_addr);
1149 if (err < 0)
1150 return err;
1151
1152 memset(&cp, 0, sizeof(cp));
1153
1154 if (adv) {
1155 hci_cpu_to_le24(adv->min_interval, cp.min_interval);
1156 hci_cpu_to_le24(adv->max_interval, cp.max_interval);
1157 cp.tx_power = adv->tx_power;
1158 } else {
1159 hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
1160 hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
1161 cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
1162 }
1163
1164 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
1165
1166 if (connectable) {
1167 if (secondary_adv)
1168 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
1169 else
1170 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
1171 } else if (hci_adv_instance_is_scannable(hdev, instance) ||
1172 (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
1173 if (secondary_adv)
1174 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
1175 else
1176 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
1177 } else {
1178 if (secondary_adv)
1179 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
1180 else
1181 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
1182 }
1183
1184 /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
1185 * contains the peer’s Identity Address and the Peer_Address_Type
1186 * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
1187 * These parameters are used to locate the corresponding local IRK in
1188 * the resolving list; this IRK is used to generate their own address
1189 * used in the advertisement.
1190 */
1191 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
1192 hci_copy_identity_address(hdev, &cp.peer_addr,
1193 &cp.peer_addr_type);
1194
1195 cp.own_addr_type = own_addr_type;
1196 cp.channel_map = hdev->le_adv_channel_map;
1197 cp.handle = instance;
1198
1199 if (flags & MGMT_ADV_FLAG_SEC_2M) {
1200 cp.primary_phy = HCI_ADV_PHY_1M;
1201 cp.secondary_phy = HCI_ADV_PHY_2M;
1202 } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
1203 cp.primary_phy = HCI_ADV_PHY_CODED;
1204 cp.secondary_phy = HCI_ADV_PHY_CODED;
1205 } else {
1206 /* In all other cases use 1M */
1207 cp.primary_phy = HCI_ADV_PHY_1M;
1208 cp.secondary_phy = HCI_ADV_PHY_1M;
1209 }
1210
1211 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
1212 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1213 if (err)
1214 return err;
1215
1216 if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
1217 own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
1218 bacmp(&random_addr, BDADDR_ANY)) {
1219 /* Check if random address need to be updated */
1220 if (adv) {
1221 if (!bacmp(&random_addr, &adv->random_addr))
1222 return 0;
1223 } else {
1224 if (!bacmp(&random_addr, &hdev->random_addr))
1225 return 0;
1226 }
1227
1228 return hci_set_adv_set_random_addr_sync(hdev, instance,
1229 &random_addr);
1230 }
1231
1232 return 0;
1233}
1234
1235static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1236{
1237 DEFINE_FLEX(struct hci_cp_le_set_ext_scan_rsp_data, pdu, data, length,
1238 HCI_MAX_EXT_AD_LENGTH);
1239 u8 len;
1240 struct adv_info *adv = NULL;
1241 int err;
1242
1243 if (instance) {
1244 adv = hci_find_adv_instance(hdev, instance);
1245 if (!adv || !adv->scan_rsp_changed)
1246 return 0;
1247 }
1248
1249 len = eir_create_scan_rsp(hdev, instance, pdu->data);
1250
1251 pdu->handle = adv ? adv->handle : instance;
1252 pdu->length = len;
1253 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1254 pdu->frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1255
1256 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
1257 struct_size(pdu, data, len), pdu,
1258 HCI_CMD_TIMEOUT);
1259 if (err)
1260 return err;
1261
1262 if (adv) {
1263 adv->scan_rsp_changed = false;
1264 } else {
1265 memcpy(hdev->scan_rsp_data, pdu->data, len);
1266 hdev->scan_rsp_data_len = len;
1267 }
1268
1269 return 0;
1270}
1271
1272static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1273{
1274 struct hci_cp_le_set_scan_rsp_data cp;
1275 u8 len;
1276
1277 memset(&cp, 0, sizeof(cp));
1278
1279 len = eir_create_scan_rsp(hdev, instance, cp.data);
1280
1281 if (hdev->scan_rsp_data_len == len &&
1282 !memcmp(cp.data, hdev->scan_rsp_data, len))
1283 return 0;
1284
1285 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
1286 hdev->scan_rsp_data_len = len;
1287
1288 cp.length = len;
1289
1290 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
1291 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1292}
1293
1294int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1295{
1296 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1297 return 0;
1298
1299 if (ext_adv_capable(hdev))
1300 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
1301
1302 return __hci_set_scan_rsp_data_sync(hdev, instance);
1303}
1304
1305int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
1306{
1307 struct hci_cp_le_set_ext_adv_enable *cp;
1308 struct hci_cp_ext_adv_set *set;
1309 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1310 struct adv_info *adv;
1311
1312 if (instance > 0) {
1313 adv = hci_find_adv_instance(hdev, instance);
1314 if (!adv)
1315 return -EINVAL;
1316 /* If already enabled there is nothing to do */
1317 if (adv->enabled)
1318 return 0;
1319 } else {
1320 adv = NULL;
1321 }
1322
1323 cp = (void *)data;
1324 set = (void *)cp->data;
1325
1326 memset(cp, 0, sizeof(*cp));
1327
1328 cp->enable = 0x01;
1329 cp->num_of_sets = 0x01;
1330
1331 memset(set, 0, sizeof(*set));
1332
1333 set->handle = adv ? adv->handle : instance;
1334
1335 /* Set duration per instance since controller is responsible for
1336 * scheduling it.
1337 */
1338 if (adv && adv->timeout) {
1339 u16 duration = adv->timeout * MSEC_PER_SEC;
1340
1341 /* Time = N * 10 ms */
1342 set->duration = cpu_to_le16(duration / 10);
1343 }
1344
1345 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1346 sizeof(*cp) +
1347 sizeof(*set) * cp->num_of_sets,
1348 data, HCI_CMD_TIMEOUT);
1349}
1350
1351int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
1352{
1353 int err;
1354
1355 err = hci_setup_ext_adv_instance_sync(hdev, instance);
1356 if (err)
1357 return err;
1358
1359 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
1360 if (err)
1361 return err;
1362
1363 return hci_enable_ext_advertising_sync(hdev, instance);
1364}
1365
1366int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1367{
1368 struct hci_cp_le_set_per_adv_enable cp;
1369 struct adv_info *adv = NULL;
1370
1371 /* If periodic advertising already disabled there is nothing to do. */
1372 adv = hci_find_adv_instance(hdev, instance);
1373 if (!adv || !adv->periodic || !adv->enabled)
1374 return 0;
1375
1376 memset(&cp, 0, sizeof(cp));
1377
1378 cp.enable = 0x00;
1379 cp.handle = instance;
1380
1381 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1382 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1383}
1384
1385static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance,
1386 u16 min_interval, u16 max_interval)
1387{
1388 struct hci_cp_le_set_per_adv_params cp;
1389
1390 memset(&cp, 0, sizeof(cp));
1391
1392 if (!min_interval)
1393 min_interval = DISCOV_LE_PER_ADV_INT_MIN;
1394
1395 if (!max_interval)
1396 max_interval = DISCOV_LE_PER_ADV_INT_MAX;
1397
1398 cp.handle = instance;
1399 cp.min_interval = cpu_to_le16(min_interval);
1400 cp.max_interval = cpu_to_le16(max_interval);
1401 cp.periodic_properties = 0x0000;
1402
1403 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS,
1404 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1405}
1406
1407static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance)
1408{
1409 DEFINE_FLEX(struct hci_cp_le_set_per_adv_data, pdu, data, length,
1410 HCI_MAX_PER_AD_LENGTH);
1411 u8 len;
1412 struct adv_info *adv = NULL;
1413
1414 if (instance) {
1415 adv = hci_find_adv_instance(hdev, instance);
1416 if (!adv || !adv->periodic)
1417 return 0;
1418 }
1419
1420 len = eir_create_per_adv_data(hdev, instance, pdu->data);
1421
1422 pdu->length = len;
1423 pdu->handle = adv ? adv->handle : instance;
1424 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1425
1426 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA,
1427 struct_size(pdu, data, len), pdu,
1428 HCI_CMD_TIMEOUT);
1429}
1430
1431static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1432{
1433 struct hci_cp_le_set_per_adv_enable cp;
1434 struct adv_info *adv = NULL;
1435
1436 /* If periodic advertising already enabled there is nothing to do. */
1437 adv = hci_find_adv_instance(hdev, instance);
1438 if (adv && adv->periodic && adv->enabled)
1439 return 0;
1440
1441 memset(&cp, 0, sizeof(cp));
1442
1443 cp.enable = 0x01;
1444 cp.handle = instance;
1445
1446 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1447 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1448}
1449
1450/* Checks if periodic advertising data contains a Basic Announcement and if it
1451 * does generates a Broadcast ID and add Broadcast Announcement.
1452 */
1453static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv)
1454{
1455 u8 bid[3];
1456 u8 ad[4 + 3];
1457
1458 /* Skip if NULL adv as instance 0x00 is used for general purpose
1459 * advertising so it cannot used for the likes of Broadcast Announcement
1460 * as it can be overwritten at any point.
1461 */
1462 if (!adv)
1463 return 0;
1464
1465 /* Check if PA data doesn't contains a Basic Audio Announcement then
1466 * there is nothing to do.
1467 */
1468 if (!eir_get_service_data(adv->per_adv_data, adv->per_adv_data_len,
1469 0x1851, NULL))
1470 return 0;
1471
1472 /* Check if advertising data already has a Broadcast Announcement since
1473 * the process may want to control the Broadcast ID directly and in that
1474 * case the kernel shall no interfere.
1475 */
1476 if (eir_get_service_data(adv->adv_data, adv->adv_data_len, 0x1852,
1477 NULL))
1478 return 0;
1479
1480 /* Generate Broadcast ID */
1481 get_random_bytes(bid, sizeof(bid));
1482 eir_append_service_data(ad, 0, 0x1852, bid, sizeof(bid));
1483 hci_set_adv_instance_data(hdev, adv->instance, sizeof(ad), ad, 0, NULL);
1484
1485 return hci_update_adv_data_sync(hdev, adv->instance);
1486}
1487
1488int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len,
1489 u8 *data, u32 flags, u16 min_interval,
1490 u16 max_interval, u16 sync_interval)
1491{
1492 struct adv_info *adv = NULL;
1493 int err;
1494 bool added = false;
1495
1496 hci_disable_per_advertising_sync(hdev, instance);
1497
1498 if (instance) {
1499 adv = hci_find_adv_instance(hdev, instance);
1500 /* Create an instance if that could not be found */
1501 if (!adv) {
1502 adv = hci_add_per_instance(hdev, instance, flags,
1503 data_len, data,
1504 sync_interval,
1505 sync_interval);
1506 if (IS_ERR(adv))
1507 return PTR_ERR(adv);
1508 adv->pending = false;
1509 added = true;
1510 }
1511 }
1512
1513 /* Start advertising */
1514 err = hci_start_ext_adv_sync(hdev, instance);
1515 if (err < 0)
1516 goto fail;
1517
1518 err = hci_adv_bcast_annoucement(hdev, adv);
1519 if (err < 0)
1520 goto fail;
1521
1522 err = hci_set_per_adv_params_sync(hdev, instance, min_interval,
1523 max_interval);
1524 if (err < 0)
1525 goto fail;
1526
1527 err = hci_set_per_adv_data_sync(hdev, instance);
1528 if (err < 0)
1529 goto fail;
1530
1531 err = hci_enable_per_advertising_sync(hdev, instance);
1532 if (err < 0)
1533 goto fail;
1534
1535 return 0;
1536
1537fail:
1538 if (added)
1539 hci_remove_adv_instance(hdev, instance);
1540
1541 return err;
1542}
1543
1544static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
1545{
1546 int err;
1547
1548 if (ext_adv_capable(hdev))
1549 return hci_start_ext_adv_sync(hdev, instance);
1550
1551 err = hci_update_adv_data_sync(hdev, instance);
1552 if (err)
1553 return err;
1554
1555 err = hci_update_scan_rsp_data_sync(hdev, instance);
1556 if (err)
1557 return err;
1558
1559 return hci_enable_advertising_sync(hdev);
1560}
1561
1562int hci_enable_advertising_sync(struct hci_dev *hdev)
1563{
1564 struct adv_info *adv_instance;
1565 struct hci_cp_le_set_adv_param cp;
1566 u8 own_addr_type, enable = 0x01;
1567 bool connectable;
1568 u16 adv_min_interval, adv_max_interval;
1569 u32 flags;
1570 u8 status;
1571
1572 if (ext_adv_capable(hdev))
1573 return hci_enable_ext_advertising_sync(hdev,
1574 hdev->cur_adv_instance);
1575
1576 flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
1577 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
1578
1579 /* If the "connectable" instance flag was not set, then choose between
1580 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1581 */
1582 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1583 mgmt_get_connectable(hdev);
1584
1585 if (!is_advertising_allowed(hdev, connectable))
1586 return -EINVAL;
1587
1588 status = hci_disable_advertising_sync(hdev);
1589 if (status)
1590 return status;
1591
1592 /* Clear the HCI_LE_ADV bit temporarily so that the
1593 * hci_update_random_address knows that it's safe to go ahead
1594 * and write a new random address. The flag will be set back on
1595 * as soon as the SET_ADV_ENABLE HCI command completes.
1596 */
1597 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1598
1599 /* Set require_privacy to true only when non-connectable
1600 * advertising is used. In that case it is fine to use a
1601 * non-resolvable private address.
1602 */
1603 status = hci_update_random_address_sync(hdev, !connectable,
1604 adv_use_rpa(hdev, flags),
1605 &own_addr_type);
1606 if (status)
1607 return status;
1608
1609 memset(&cp, 0, sizeof(cp));
1610
1611 if (adv_instance) {
1612 adv_min_interval = adv_instance->min_interval;
1613 adv_max_interval = adv_instance->max_interval;
1614 } else {
1615 adv_min_interval = hdev->le_adv_min_interval;
1616 adv_max_interval = hdev->le_adv_max_interval;
1617 }
1618
1619 if (connectable) {
1620 cp.type = LE_ADV_IND;
1621 } else {
1622 if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
1623 cp.type = LE_ADV_SCAN_IND;
1624 else
1625 cp.type = LE_ADV_NONCONN_IND;
1626
1627 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1628 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
1629 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
1630 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
1631 }
1632 }
1633
1634 cp.min_interval = cpu_to_le16(adv_min_interval);
1635 cp.max_interval = cpu_to_le16(adv_max_interval);
1636 cp.own_address_type = own_addr_type;
1637 cp.channel_map = hdev->le_adv_channel_map;
1638
1639 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
1640 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1641 if (status)
1642 return status;
1643
1644 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1645 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1646}
1647
1648static int enable_advertising_sync(struct hci_dev *hdev, void *data)
1649{
1650 return hci_enable_advertising_sync(hdev);
1651}
1652
1653int hci_enable_advertising(struct hci_dev *hdev)
1654{
1655 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
1656 list_empty(&hdev->adv_instances))
1657 return 0;
1658
1659 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
1660}
1661
1662int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1663 struct sock *sk)
1664{
1665 int err;
1666
1667 if (!ext_adv_capable(hdev))
1668 return 0;
1669
1670 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1671 if (err)
1672 return err;
1673
1674 /* If request specifies an instance that doesn't exist, fail */
1675 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
1676 return -EINVAL;
1677
1678 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
1679 sizeof(instance), &instance, 0,
1680 HCI_CMD_TIMEOUT, sk);
1681}
1682
1683static int remove_ext_adv_sync(struct hci_dev *hdev, void *data)
1684{
1685 struct adv_info *adv = data;
1686 u8 instance = 0;
1687
1688 if (adv)
1689 instance = adv->instance;
1690
1691 return hci_remove_ext_adv_instance_sync(hdev, instance, NULL);
1692}
1693
1694int hci_remove_ext_adv_instance(struct hci_dev *hdev, u8 instance)
1695{
1696 struct adv_info *adv = NULL;
1697
1698 if (instance) {
1699 adv = hci_find_adv_instance(hdev, instance);
1700 if (!adv)
1701 return -EINVAL;
1702 }
1703
1704 return hci_cmd_sync_queue(hdev, remove_ext_adv_sync, adv, NULL);
1705}
1706
1707int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason)
1708{
1709 struct hci_cp_le_term_big cp;
1710
1711 memset(&cp, 0, sizeof(cp));
1712 cp.handle = handle;
1713 cp.reason = reason;
1714
1715 return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG,
1716 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1717}
1718
1719static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1720{
1721 DEFINE_FLEX(struct hci_cp_le_set_ext_adv_data, pdu, data, length,
1722 HCI_MAX_EXT_AD_LENGTH);
1723 u8 len;
1724 struct adv_info *adv = NULL;
1725 int err;
1726
1727 if (instance) {
1728 adv = hci_find_adv_instance(hdev, instance);
1729 if (!adv || !adv->adv_data_changed)
1730 return 0;
1731 }
1732
1733 len = eir_create_adv_data(hdev, instance, pdu->data);
1734
1735 pdu->length = len;
1736 pdu->handle = adv ? adv->handle : instance;
1737 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1738 pdu->frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1739
1740 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1741 struct_size(pdu, data, len), pdu,
1742 HCI_CMD_TIMEOUT);
1743 if (err)
1744 return err;
1745
1746 /* Update data if the command succeed */
1747 if (adv) {
1748 adv->adv_data_changed = false;
1749 } else {
1750 memcpy(hdev->adv_data, pdu->data, len);
1751 hdev->adv_data_len = len;
1752 }
1753
1754 return 0;
1755}
1756
1757static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1758{
1759 struct hci_cp_le_set_adv_data cp;
1760 u8 len;
1761
1762 memset(&cp, 0, sizeof(cp));
1763
1764 len = eir_create_adv_data(hdev, instance, cp.data);
1765
1766 /* There's nothing to do if the data hasn't changed */
1767 if (hdev->adv_data_len == len &&
1768 memcmp(cp.data, hdev->adv_data, len) == 0)
1769 return 0;
1770
1771 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1772 hdev->adv_data_len = len;
1773
1774 cp.length = len;
1775
1776 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1777 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1778}
1779
1780int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1781{
1782 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1783 return 0;
1784
1785 if (ext_adv_capable(hdev))
1786 return hci_set_ext_adv_data_sync(hdev, instance);
1787
1788 return hci_set_adv_data_sync(hdev, instance);
1789}
1790
1791int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1792 bool force)
1793{
1794 struct adv_info *adv = NULL;
1795 u16 timeout;
1796
1797 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
1798 return -EPERM;
1799
1800 if (hdev->adv_instance_timeout)
1801 return -EBUSY;
1802
1803 adv = hci_find_adv_instance(hdev, instance);
1804 if (!adv)
1805 return -ENOENT;
1806
1807 /* A zero timeout means unlimited advertising. As long as there is
1808 * only one instance, duration should be ignored. We still set a timeout
1809 * in case further instances are being added later on.
1810 *
1811 * If the remaining lifetime of the instance is more than the duration
1812 * then the timeout corresponds to the duration, otherwise it will be
1813 * reduced to the remaining instance lifetime.
1814 */
1815 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
1816 timeout = adv->duration;
1817 else
1818 timeout = adv->remaining_time;
1819
1820 /* The remaining time is being reduced unless the instance is being
1821 * advertised without time limit.
1822 */
1823 if (adv->timeout)
1824 adv->remaining_time = adv->remaining_time - timeout;
1825
1826 /* Only use work for scheduling instances with legacy advertising */
1827 if (!ext_adv_capable(hdev)) {
1828 hdev->adv_instance_timeout = timeout;
1829 queue_delayed_work(hdev->req_workqueue,
1830 &hdev->adv_instance_expire,
1831 msecs_to_jiffies(timeout * 1000));
1832 }
1833
1834 /* If we're just re-scheduling the same instance again then do not
1835 * execute any HCI commands. This happens when a single instance is
1836 * being advertised.
1837 */
1838 if (!force && hdev->cur_adv_instance == instance &&
1839 hci_dev_test_flag(hdev, HCI_LE_ADV))
1840 return 0;
1841
1842 hdev->cur_adv_instance = instance;
1843
1844 return hci_start_adv_sync(hdev, instance);
1845}
1846
1847static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
1848{
1849 int err;
1850
1851 if (!ext_adv_capable(hdev))
1852 return 0;
1853
1854 /* Disable instance 0x00 to disable all instances */
1855 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1856 if (err)
1857 return err;
1858
1859 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
1860 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1861}
1862
1863static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
1864{
1865 struct adv_info *adv, *n;
1866 int err = 0;
1867
1868 if (ext_adv_capable(hdev))
1869 /* Remove all existing sets */
1870 err = hci_clear_adv_sets_sync(hdev, sk);
1871 if (ext_adv_capable(hdev))
1872 return err;
1873
1874 /* This is safe as long as there is no command send while the lock is
1875 * held.
1876 */
1877 hci_dev_lock(hdev);
1878
1879 /* Cleanup non-ext instances */
1880 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1881 u8 instance = adv->instance;
1882 int err;
1883
1884 if (!(force || adv->timeout))
1885 continue;
1886
1887 err = hci_remove_adv_instance(hdev, instance);
1888 if (!err)
1889 mgmt_advertising_removed(sk, hdev, instance);
1890 }
1891
1892 hci_dev_unlock(hdev);
1893
1894 return 0;
1895}
1896
1897static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
1898 struct sock *sk)
1899{
1900 int err = 0;
1901
1902 /* If we use extended advertising, instance has to be removed first. */
1903 if (ext_adv_capable(hdev))
1904 err = hci_remove_ext_adv_instance_sync(hdev, instance, sk);
1905 if (ext_adv_capable(hdev))
1906 return err;
1907
1908 /* This is safe as long as there is no command send while the lock is
1909 * held.
1910 */
1911 hci_dev_lock(hdev);
1912
1913 err = hci_remove_adv_instance(hdev, instance);
1914 if (!err)
1915 mgmt_advertising_removed(sk, hdev, instance);
1916
1917 hci_dev_unlock(hdev);
1918
1919 return err;
1920}
1921
1922/* For a single instance:
1923 * - force == true: The instance will be removed even when its remaining
1924 * lifetime is not zero.
1925 * - force == false: the instance will be deactivated but kept stored unless
1926 * the remaining lifetime is zero.
1927 *
1928 * For instance == 0x00:
1929 * - force == true: All instances will be removed regardless of their timeout
1930 * setting.
1931 * - force == false: Only instances that have a timeout will be removed.
1932 */
1933int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
1934 u8 instance, bool force)
1935{
1936 struct adv_info *next = NULL;
1937 int err;
1938
1939 /* Cancel any timeout concerning the removed instance(s). */
1940 if (!instance || hdev->cur_adv_instance == instance)
1941 cancel_adv_timeout(hdev);
1942
1943 /* Get the next instance to advertise BEFORE we remove
1944 * the current one. This can be the same instance again
1945 * if there is only one instance.
1946 */
1947 if (hdev->cur_adv_instance == instance)
1948 next = hci_get_next_instance(hdev, instance);
1949
1950 if (!instance) {
1951 err = hci_clear_adv_sync(hdev, sk, force);
1952 if (err)
1953 return err;
1954 } else {
1955 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1956
1957 if (force || (adv && adv->timeout && !adv->remaining_time)) {
1958 /* Don't advertise a removed instance. */
1959 if (next && next->instance == instance)
1960 next = NULL;
1961
1962 err = hci_remove_adv_sync(hdev, instance, sk);
1963 if (err)
1964 return err;
1965 }
1966 }
1967
1968 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
1969 return 0;
1970
1971 if (next && !ext_adv_capable(hdev))
1972 hci_schedule_adv_instance_sync(hdev, next->instance, false);
1973
1974 return 0;
1975}
1976
1977int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
1978{
1979 struct hci_cp_read_rssi cp;
1980
1981 cp.handle = handle;
1982 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
1983 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1984}
1985
1986int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
1987{
1988 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
1989 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
1990}
1991
1992int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
1993{
1994 struct hci_cp_read_tx_power cp;
1995
1996 cp.handle = handle;
1997 cp.type = type;
1998 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
1999 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2000}
2001
2002int hci_disable_advertising_sync(struct hci_dev *hdev)
2003{
2004 u8 enable = 0x00;
2005 int err = 0;
2006
2007 /* If controller is not advertising we are done. */
2008 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
2009 return 0;
2010
2011 if (ext_adv_capable(hdev))
2012 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
2013 if (ext_adv_capable(hdev))
2014 return err;
2015
2016 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
2017 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
2018}
2019
2020static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
2021 u8 filter_dup)
2022{
2023 struct hci_cp_le_set_ext_scan_enable cp;
2024
2025 memset(&cp, 0, sizeof(cp));
2026 cp.enable = val;
2027
2028 if (hci_dev_test_flag(hdev, HCI_MESH))
2029 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2030 else
2031 cp.filter_dup = filter_dup;
2032
2033 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
2034 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2035}
2036
2037static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
2038 u8 filter_dup)
2039{
2040 struct hci_cp_le_set_scan_enable cp;
2041
2042 if (use_ext_scan(hdev))
2043 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
2044
2045 memset(&cp, 0, sizeof(cp));
2046 cp.enable = val;
2047
2048 if (val && hci_dev_test_flag(hdev, HCI_MESH))
2049 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2050 else
2051 cp.filter_dup = filter_dup;
2052
2053 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
2054 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2055}
2056
2057static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
2058{
2059 if (!use_ll_privacy(hdev))
2060 return 0;
2061
2062 /* If controller is not/already resolving we are done. */
2063 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2064 return 0;
2065
2066 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
2067 sizeof(val), &val, HCI_CMD_TIMEOUT);
2068}
2069
2070static int hci_scan_disable_sync(struct hci_dev *hdev)
2071{
2072 int err;
2073
2074 /* If controller is not scanning we are done. */
2075 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
2076 return 0;
2077
2078 if (hdev->scanning_paused) {
2079 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2080 return 0;
2081 }
2082
2083 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
2084 if (err) {
2085 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
2086 return err;
2087 }
2088
2089 return err;
2090}
2091
2092static bool scan_use_rpa(struct hci_dev *hdev)
2093{
2094 return hci_dev_test_flag(hdev, HCI_PRIVACY);
2095}
2096
2097static void hci_start_interleave_scan(struct hci_dev *hdev)
2098{
2099 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
2100 queue_delayed_work(hdev->req_workqueue,
2101 &hdev->interleave_scan, 0);
2102}
2103
2104static bool is_interleave_scanning(struct hci_dev *hdev)
2105{
2106 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
2107}
2108
2109static void cancel_interleave_scan(struct hci_dev *hdev)
2110{
2111 bt_dev_dbg(hdev, "cancelling interleave scan");
2112
2113 cancel_delayed_work_sync(&hdev->interleave_scan);
2114
2115 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
2116}
2117
2118/* Return true if interleave_scan wasn't started until exiting this function,
2119 * otherwise, return false
2120 */
2121static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
2122{
2123 /* Do interleaved scan only if all of the following are true:
2124 * - There is at least one ADV monitor
2125 * - At least one pending LE connection or one device to be scanned for
2126 * - Monitor offloading is not supported
2127 * If so, we should alternate between allowlist scan and one without
2128 * any filters to save power.
2129 */
2130 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
2131 !(list_empty(&hdev->pend_le_conns) &&
2132 list_empty(&hdev->pend_le_reports)) &&
2133 hci_get_adv_monitor_offload_ext(hdev) ==
2134 HCI_ADV_MONITOR_EXT_NONE;
2135 bool is_interleaving = is_interleave_scanning(hdev);
2136
2137 if (use_interleaving && !is_interleaving) {
2138 hci_start_interleave_scan(hdev);
2139 bt_dev_dbg(hdev, "starting interleave scan");
2140 return true;
2141 }
2142
2143 if (!use_interleaving && is_interleaving)
2144 cancel_interleave_scan(hdev);
2145
2146 return false;
2147}
2148
2149/* Removes connection to resolve list if needed.*/
2150static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
2151 bdaddr_t *bdaddr, u8 bdaddr_type)
2152{
2153 struct hci_cp_le_del_from_resolv_list cp;
2154 struct bdaddr_list_with_irk *entry;
2155
2156 if (!use_ll_privacy(hdev))
2157 return 0;
2158
2159 /* Check if the IRK has been programmed */
2160 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
2161 bdaddr_type);
2162 if (!entry)
2163 return 0;
2164
2165 cp.bdaddr_type = bdaddr_type;
2166 bacpy(&cp.bdaddr, bdaddr);
2167
2168 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
2169 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2170}
2171
2172static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
2173 bdaddr_t *bdaddr, u8 bdaddr_type)
2174{
2175 struct hci_cp_le_del_from_accept_list cp;
2176 int err;
2177
2178 /* Check if device is on accept list before removing it */
2179 if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
2180 return 0;
2181
2182 cp.bdaddr_type = bdaddr_type;
2183 bacpy(&cp.bdaddr, bdaddr);
2184
2185 /* Ignore errors when removing from resolving list as that is likely
2186 * that the device was never added.
2187 */
2188 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2189
2190 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
2191 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2192 if (err) {
2193 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
2194 return err;
2195 }
2196
2197 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
2198 cp.bdaddr_type);
2199
2200 return 0;
2201}
2202
2203struct conn_params {
2204 bdaddr_t addr;
2205 u8 addr_type;
2206 hci_conn_flags_t flags;
2207 u8 privacy_mode;
2208};
2209
2210/* Adds connection to resolve list if needed.
2211 * Setting params to NULL programs local hdev->irk
2212 */
2213static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
2214 struct conn_params *params)
2215{
2216 struct hci_cp_le_add_to_resolv_list cp;
2217 struct smp_irk *irk;
2218 struct bdaddr_list_with_irk *entry;
2219 struct hci_conn_params *p;
2220
2221 if (!use_ll_privacy(hdev))
2222 return 0;
2223
2224 /* Attempt to program local identity address, type and irk if params is
2225 * NULL.
2226 */
2227 if (!params) {
2228 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
2229 return 0;
2230
2231 hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
2232 memcpy(cp.peer_irk, hdev->irk, 16);
2233 goto done;
2234 }
2235
2236 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
2237 if (!irk)
2238 return 0;
2239
2240 /* Check if the IK has _not_ been programmed yet. */
2241 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
2242 ¶ms->addr,
2243 params->addr_type);
2244 if (entry)
2245 return 0;
2246
2247 cp.bdaddr_type = params->addr_type;
2248 bacpy(&cp.bdaddr, ¶ms->addr);
2249 memcpy(cp.peer_irk, irk->val, 16);
2250
2251 /* Default privacy mode is always Network */
2252 params->privacy_mode = HCI_NETWORK_PRIVACY;
2253
2254 rcu_read_lock();
2255 p = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2256 ¶ms->addr, params->addr_type);
2257 if (!p)
2258 p = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2259 ¶ms->addr, params->addr_type);
2260 if (p)
2261 WRITE_ONCE(p->privacy_mode, HCI_NETWORK_PRIVACY);
2262 rcu_read_unlock();
2263
2264done:
2265 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
2266 memcpy(cp.local_irk, hdev->irk, 16);
2267 else
2268 memset(cp.local_irk, 0, 16);
2269
2270 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
2271 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2272}
2273
2274/* Set Device Privacy Mode. */
2275static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
2276 struct conn_params *params)
2277{
2278 struct hci_cp_le_set_privacy_mode cp;
2279 struct smp_irk *irk;
2280
2281 /* If device privacy mode has already been set there is nothing to do */
2282 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
2283 return 0;
2284
2285 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
2286 * indicates that LL Privacy has been enabled and
2287 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
2288 */
2289 if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
2290 return 0;
2291
2292 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
2293 if (!irk)
2294 return 0;
2295
2296 memset(&cp, 0, sizeof(cp));
2297 cp.bdaddr_type = irk->addr_type;
2298 bacpy(&cp.bdaddr, &irk->bdaddr);
2299 cp.mode = HCI_DEVICE_PRIVACY;
2300
2301 /* Note: params->privacy_mode is not updated since it is a copy */
2302
2303 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
2304 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2305}
2306
2307/* Adds connection to allow list if needed, if the device uses RPA (has IRK)
2308 * this attempts to program the device in the resolving list as well and
2309 * properly set the privacy mode.
2310 */
2311static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
2312 struct conn_params *params,
2313 u8 *num_entries)
2314{
2315 struct hci_cp_le_add_to_accept_list cp;
2316 int err;
2317
2318 /* During suspend, only wakeable devices can be in acceptlist */
2319 if (hdev->suspended &&
2320 !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) {
2321 hci_le_del_accept_list_sync(hdev, ¶ms->addr,
2322 params->addr_type);
2323 return 0;
2324 }
2325
2326 /* Select filter policy to accept all advertising */
2327 if (*num_entries >= hdev->le_accept_list_size)
2328 return -ENOSPC;
2329
2330 /* Accept list can not be used with RPAs */
2331 if (!use_ll_privacy(hdev) &&
2332 hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type))
2333 return -EINVAL;
2334
2335 /* Attempt to program the device in the resolving list first to avoid
2336 * having to rollback in case it fails since the resolving list is
2337 * dynamic it can probably be smaller than the accept list.
2338 */
2339 err = hci_le_add_resolve_list_sync(hdev, params);
2340 if (err) {
2341 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
2342 return err;
2343 }
2344
2345 /* Set Privacy Mode */
2346 err = hci_le_set_privacy_mode_sync(hdev, params);
2347 if (err) {
2348 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
2349 return err;
2350 }
2351
2352 /* Check if already in accept list */
2353 if (hci_bdaddr_list_lookup(&hdev->le_accept_list, ¶ms->addr,
2354 params->addr_type))
2355 return 0;
2356
2357 *num_entries += 1;
2358 cp.bdaddr_type = params->addr_type;
2359 bacpy(&cp.bdaddr, ¶ms->addr);
2360
2361 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
2362 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2363 if (err) {
2364 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
2365 /* Rollback the device from the resolving list */
2366 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2367 return err;
2368 }
2369
2370 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
2371 cp.bdaddr_type);
2372
2373 return 0;
2374}
2375
2376/* This function disables/pause all advertising instances */
2377static int hci_pause_advertising_sync(struct hci_dev *hdev)
2378{
2379 int err;
2380 int old_state;
2381
2382 /* If already been paused there is nothing to do. */
2383 if (hdev->advertising_paused)
2384 return 0;
2385
2386 bt_dev_dbg(hdev, "Pausing directed advertising");
2387
2388 /* Stop directed advertising */
2389 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
2390 if (old_state) {
2391 /* When discoverable timeout triggers, then just make sure
2392 * the limited discoverable flag is cleared. Even in the case
2393 * of a timeout triggered from general discoverable, it is
2394 * safe to unconditionally clear the flag.
2395 */
2396 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
2397 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
2398 hdev->discov_timeout = 0;
2399 }
2400
2401 bt_dev_dbg(hdev, "Pausing advertising instances");
2402
2403 /* Call to disable any advertisements active on the controller.
2404 * This will succeed even if no advertisements are configured.
2405 */
2406 err = hci_disable_advertising_sync(hdev);
2407 if (err)
2408 return err;
2409
2410 /* If we are using software rotation, pause the loop */
2411 if (!ext_adv_capable(hdev))
2412 cancel_adv_timeout(hdev);
2413
2414 hdev->advertising_paused = true;
2415 hdev->advertising_old_state = old_state;
2416
2417 return 0;
2418}
2419
2420/* This function enables all user advertising instances */
2421static int hci_resume_advertising_sync(struct hci_dev *hdev)
2422{
2423 struct adv_info *adv, *tmp;
2424 int err;
2425
2426 /* If advertising has not been paused there is nothing to do. */
2427 if (!hdev->advertising_paused)
2428 return 0;
2429
2430 /* Resume directed advertising */
2431 hdev->advertising_paused = false;
2432 if (hdev->advertising_old_state) {
2433 hci_dev_set_flag(hdev, HCI_ADVERTISING);
2434 hdev->advertising_old_state = 0;
2435 }
2436
2437 bt_dev_dbg(hdev, "Resuming advertising instances");
2438
2439 if (ext_adv_capable(hdev)) {
2440 /* Call for each tracked instance to be re-enabled */
2441 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
2442 err = hci_enable_ext_advertising_sync(hdev,
2443 adv->instance);
2444 if (!err)
2445 continue;
2446
2447 /* If the instance cannot be resumed remove it */
2448 hci_remove_ext_adv_instance_sync(hdev, adv->instance,
2449 NULL);
2450 }
2451 } else {
2452 /* Schedule for most recent instance to be restarted and begin
2453 * the software rotation loop
2454 */
2455 err = hci_schedule_adv_instance_sync(hdev,
2456 hdev->cur_adv_instance,
2457 true);
2458 }
2459
2460 hdev->advertising_paused = false;
2461
2462 return err;
2463}
2464
2465static int hci_pause_addr_resolution(struct hci_dev *hdev)
2466{
2467 int err;
2468
2469 if (!use_ll_privacy(hdev))
2470 return 0;
2471
2472 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2473 return 0;
2474
2475 /* Cannot disable addr resolution if scanning is enabled or
2476 * when initiating an LE connection.
2477 */
2478 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2479 hci_lookup_le_connect(hdev)) {
2480 bt_dev_err(hdev, "Command not allowed when scan/LE connect");
2481 return -EPERM;
2482 }
2483
2484 /* Cannot disable addr resolution if advertising is enabled. */
2485 err = hci_pause_advertising_sync(hdev);
2486 if (err) {
2487 bt_dev_err(hdev, "Pause advertising failed: %d", err);
2488 return err;
2489 }
2490
2491 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2492 if (err)
2493 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
2494 err);
2495
2496 /* Return if address resolution is disabled and RPA is not used. */
2497 if (!err && scan_use_rpa(hdev))
2498 return 0;
2499
2500 hci_resume_advertising_sync(hdev);
2501 return err;
2502}
2503
2504struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
2505 bool extended, struct sock *sk)
2506{
2507 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
2508 HCI_OP_READ_LOCAL_OOB_DATA;
2509
2510 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
2511}
2512
2513static struct conn_params *conn_params_copy(struct list_head *list, size_t *n)
2514{
2515 struct hci_conn_params *params;
2516 struct conn_params *p;
2517 size_t i;
2518
2519 rcu_read_lock();
2520
2521 i = 0;
2522 list_for_each_entry_rcu(params, list, action)
2523 ++i;
2524 *n = i;
2525
2526 rcu_read_unlock();
2527
2528 p = kvcalloc(*n, sizeof(struct conn_params), GFP_KERNEL);
2529 if (!p)
2530 return NULL;
2531
2532 rcu_read_lock();
2533
2534 i = 0;
2535 list_for_each_entry_rcu(params, list, action) {
2536 /* Racing adds are handled in next scan update */
2537 if (i >= *n)
2538 break;
2539
2540 /* No hdev->lock, but: addr, addr_type are immutable.
2541 * privacy_mode is only written by us or in
2542 * hci_cc_le_set_privacy_mode that we wait for.
2543 * We should be idempotent so MGMT updating flags
2544 * while we are processing is OK.
2545 */
2546 bacpy(&p[i].addr, ¶ms->addr);
2547 p[i].addr_type = params->addr_type;
2548 p[i].flags = READ_ONCE(params->flags);
2549 p[i].privacy_mode = READ_ONCE(params->privacy_mode);
2550 ++i;
2551 }
2552
2553 rcu_read_unlock();
2554
2555 *n = i;
2556 return p;
2557}
2558
2559/* Clear LE Accept List */
2560static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
2561{
2562 if (!(hdev->commands[26] & 0x80))
2563 return 0;
2564
2565 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
2566 HCI_CMD_TIMEOUT);
2567}
2568
2569/* Device must not be scanning when updating the accept list.
2570 *
2571 * Update is done using the following sequence:
2572 *
2573 * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
2574 * Remove Devices From Accept List ->
2575 * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
2576 * Add Devices to Accept List ->
2577 * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
2578 * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
2579 * Enable Scanning
2580 *
2581 * In case of failure advertising shall be restored to its original state and
2582 * return would disable accept list since either accept or resolving list could
2583 * not be programmed.
2584 *
2585 */
2586static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
2587{
2588 struct conn_params *params;
2589 struct bdaddr_list *b, *t;
2590 u8 num_entries = 0;
2591 bool pend_conn, pend_report;
2592 u8 filter_policy;
2593 size_t i, n;
2594 int err;
2595
2596 /* Pause advertising if resolving list can be used as controllers
2597 * cannot accept resolving list modifications while advertising.
2598 */
2599 if (use_ll_privacy(hdev)) {
2600 err = hci_pause_advertising_sync(hdev);
2601 if (err) {
2602 bt_dev_err(hdev, "pause advertising failed: %d", err);
2603 return 0x00;
2604 }
2605 }
2606
2607 /* Disable address resolution while reprogramming accept list since
2608 * devices that do have an IRK will be programmed in the resolving list
2609 * when LL Privacy is enabled.
2610 */
2611 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2612 if (err) {
2613 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
2614 goto done;
2615 }
2616
2617 /* Force address filtering if PA Sync is in progress */
2618 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2619 struct hci_cp_le_pa_create_sync *sent;
2620
2621 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_PA_CREATE_SYNC);
2622 if (sent) {
2623 struct conn_params pa;
2624
2625 memset(&pa, 0, sizeof(pa));
2626
2627 bacpy(&pa.addr, &sent->addr);
2628 pa.addr_type = sent->addr_type;
2629
2630 /* Clear first since there could be addresses left
2631 * behind.
2632 */
2633 hci_le_clear_accept_list_sync(hdev);
2634
2635 num_entries = 1;
2636 err = hci_le_add_accept_list_sync(hdev, &pa,
2637 &num_entries);
2638 goto done;
2639 }
2640 }
2641
2642 /* Go through the current accept list programmed into the
2643 * controller one by one and check if that address is connected or is
2644 * still in the list of pending connections or list of devices to
2645 * report. If not present in either list, then remove it from
2646 * the controller.
2647 */
2648 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
2649 if (hci_conn_hash_lookup_le(hdev, &b->bdaddr, b->bdaddr_type))
2650 continue;
2651
2652 /* Pointers not dereferenced, no locks needed */
2653 pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2654 &b->bdaddr,
2655 b->bdaddr_type);
2656 pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2657 &b->bdaddr,
2658 b->bdaddr_type);
2659
2660 /* If the device is not likely to connect or report,
2661 * remove it from the acceptlist.
2662 */
2663 if (!pend_conn && !pend_report) {
2664 hci_le_del_accept_list_sync(hdev, &b->bdaddr,
2665 b->bdaddr_type);
2666 continue;
2667 }
2668
2669 num_entries++;
2670 }
2671
2672 /* Since all no longer valid accept list entries have been
2673 * removed, walk through the list of pending connections
2674 * and ensure that any new device gets programmed into
2675 * the controller.
2676 *
2677 * If the list of the devices is larger than the list of
2678 * available accept list entries in the controller, then
2679 * just abort and return filer policy value to not use the
2680 * accept list.
2681 *
2682 * The list and params may be mutated while we wait for events,
2683 * so make a copy and iterate it.
2684 */
2685
2686 params = conn_params_copy(&hdev->pend_le_conns, &n);
2687 if (!params) {
2688 err = -ENOMEM;
2689 goto done;
2690 }
2691
2692 for (i = 0; i < n; ++i) {
2693 err = hci_le_add_accept_list_sync(hdev, ¶ms[i],
2694 &num_entries);
2695 if (err) {
2696 kvfree(params);
2697 goto done;
2698 }
2699 }
2700
2701 kvfree(params);
2702
2703 /* After adding all new pending connections, walk through
2704 * the list of pending reports and also add these to the
2705 * accept list if there is still space. Abort if space runs out.
2706 */
2707
2708 params = conn_params_copy(&hdev->pend_le_reports, &n);
2709 if (!params) {
2710 err = -ENOMEM;
2711 goto done;
2712 }
2713
2714 for (i = 0; i < n; ++i) {
2715 err = hci_le_add_accept_list_sync(hdev, ¶ms[i],
2716 &num_entries);
2717 if (err) {
2718 kvfree(params);
2719 goto done;
2720 }
2721 }
2722
2723 kvfree(params);
2724
2725 /* Use the allowlist unless the following conditions are all true:
2726 * - We are not currently suspending
2727 * - There are 1 or more ADV monitors registered and it's not offloaded
2728 * - Interleaved scanning is not currently using the allowlist
2729 */
2730 if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
2731 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
2732 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
2733 err = -EINVAL;
2734
2735done:
2736 filter_policy = err ? 0x00 : 0x01;
2737
2738 /* Enable address resolution when LL Privacy is enabled. */
2739 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2740 if (err)
2741 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
2742
2743 /* Resume advertising if it was paused */
2744 if (use_ll_privacy(hdev))
2745 hci_resume_advertising_sync(hdev);
2746
2747 /* Select filter policy to use accept list */
2748 return filter_policy;
2749}
2750
2751static void hci_le_scan_phy_params(struct hci_cp_le_scan_phy_params *cp,
2752 u8 type, u16 interval, u16 window)
2753{
2754 cp->type = type;
2755 cp->interval = cpu_to_le16(interval);
2756 cp->window = cpu_to_le16(window);
2757}
2758
2759static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
2760 u16 interval, u16 window,
2761 u8 own_addr_type, u8 filter_policy)
2762{
2763 struct hci_cp_le_set_ext_scan_params *cp;
2764 struct hci_cp_le_scan_phy_params *phy;
2765 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
2766 u8 num_phy = 0x00;
2767
2768 cp = (void *)data;
2769 phy = (void *)cp->data;
2770
2771 memset(data, 0, sizeof(data));
2772
2773 cp->own_addr_type = own_addr_type;
2774 cp->filter_policy = filter_policy;
2775
2776 /* Check if PA Sync is in progress then select the PHY based on the
2777 * hci_conn.iso_qos.
2778 */
2779 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2780 struct hci_cp_le_add_to_accept_list *sent;
2781
2782 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
2783 if (sent) {
2784 struct hci_conn *conn;
2785
2786 conn = hci_conn_hash_lookup_ba(hdev, ISO_LINK,
2787 &sent->bdaddr);
2788 if (conn) {
2789 struct bt_iso_qos *qos = &conn->iso_qos;
2790
2791 if (qos->bcast.in.phy & BT_ISO_PHY_1M ||
2792 qos->bcast.in.phy & BT_ISO_PHY_2M) {
2793 cp->scanning_phys |= LE_SCAN_PHY_1M;
2794 hci_le_scan_phy_params(phy, type,
2795 interval,
2796 window);
2797 num_phy++;
2798 phy++;
2799 }
2800
2801 if (qos->bcast.in.phy & BT_ISO_PHY_CODED) {
2802 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2803 hci_le_scan_phy_params(phy, type,
2804 interval * 3,
2805 window * 3);
2806 num_phy++;
2807 phy++;
2808 }
2809
2810 if (num_phy)
2811 goto done;
2812 }
2813 }
2814 }
2815
2816 if (scan_1m(hdev) || scan_2m(hdev)) {
2817 cp->scanning_phys |= LE_SCAN_PHY_1M;
2818 hci_le_scan_phy_params(phy, type, interval, window);
2819 num_phy++;
2820 phy++;
2821 }
2822
2823 if (scan_coded(hdev)) {
2824 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2825 hci_le_scan_phy_params(phy, type, interval * 3, window * 3);
2826 num_phy++;
2827 phy++;
2828 }
2829
2830done:
2831 if (!num_phy)
2832 return -EINVAL;
2833
2834 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
2835 sizeof(*cp) + sizeof(*phy) * num_phy,
2836 data, HCI_CMD_TIMEOUT);
2837}
2838
2839static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
2840 u16 interval, u16 window,
2841 u8 own_addr_type, u8 filter_policy)
2842{
2843 struct hci_cp_le_set_scan_param cp;
2844
2845 if (use_ext_scan(hdev))
2846 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
2847 window, own_addr_type,
2848 filter_policy);
2849
2850 memset(&cp, 0, sizeof(cp));
2851 cp.type = type;
2852 cp.interval = cpu_to_le16(interval);
2853 cp.window = cpu_to_le16(window);
2854 cp.own_address_type = own_addr_type;
2855 cp.filter_policy = filter_policy;
2856
2857 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
2858 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2859}
2860
2861static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
2862 u16 window, u8 own_addr_type, u8 filter_policy,
2863 u8 filter_dup)
2864{
2865 int err;
2866
2867 if (hdev->scanning_paused) {
2868 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2869 return 0;
2870 }
2871
2872 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
2873 own_addr_type, filter_policy);
2874 if (err)
2875 return err;
2876
2877 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
2878}
2879
2880static int hci_passive_scan_sync(struct hci_dev *hdev)
2881{
2882 u8 own_addr_type;
2883 u8 filter_policy;
2884 u16 window, interval;
2885 u8 filter_dups = LE_SCAN_FILTER_DUP_ENABLE;
2886 int err;
2887
2888 if (hdev->scanning_paused) {
2889 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2890 return 0;
2891 }
2892
2893 err = hci_scan_disable_sync(hdev);
2894 if (err) {
2895 bt_dev_err(hdev, "disable scanning failed: %d", err);
2896 return err;
2897 }
2898
2899 /* Set require_privacy to false since no SCAN_REQ are send
2900 * during passive scanning. Not using an non-resolvable address
2901 * here is important so that peer devices using direct
2902 * advertising with our address will be correctly reported
2903 * by the controller.
2904 */
2905 if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
2906 &own_addr_type))
2907 return 0;
2908
2909 if (hdev->enable_advmon_interleave_scan &&
2910 hci_update_interleaved_scan_sync(hdev))
2911 return 0;
2912
2913 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
2914
2915 /* Adding or removing entries from the accept list must
2916 * happen before enabling scanning. The controller does
2917 * not allow accept list modification while scanning.
2918 */
2919 filter_policy = hci_update_accept_list_sync(hdev);
2920
2921 /* When the controller is using random resolvable addresses and
2922 * with that having LE privacy enabled, then controllers with
2923 * Extended Scanner Filter Policies support can now enable support
2924 * for handling directed advertising.
2925 *
2926 * So instead of using filter polices 0x00 (no acceptlist)
2927 * and 0x01 (acceptlist enabled) use the new filter policies
2928 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
2929 */
2930 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
2931 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
2932 filter_policy |= 0x02;
2933
2934 if (hdev->suspended) {
2935 window = hdev->le_scan_window_suspend;
2936 interval = hdev->le_scan_int_suspend;
2937 } else if (hci_is_le_conn_scanning(hdev)) {
2938 window = hdev->le_scan_window_connect;
2939 interval = hdev->le_scan_int_connect;
2940 } else if (hci_is_adv_monitoring(hdev)) {
2941 window = hdev->le_scan_window_adv_monitor;
2942 interval = hdev->le_scan_int_adv_monitor;
2943 } else {
2944 window = hdev->le_scan_window;
2945 interval = hdev->le_scan_interval;
2946 }
2947
2948 /* Disable all filtering for Mesh */
2949 if (hci_dev_test_flag(hdev, HCI_MESH)) {
2950 filter_policy = 0;
2951 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
2952 }
2953
2954 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
2955
2956 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
2957 own_addr_type, filter_policy, filter_dups);
2958}
2959
2960/* This function controls the passive scanning based on hdev->pend_le_conns
2961 * list. If there are pending LE connection we start the background scanning,
2962 * otherwise we stop it in the following sequence:
2963 *
2964 * If there are devices to scan:
2965 *
2966 * Disable Scanning -> Update Accept List ->
2967 * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
2968 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
2969 * Enable Scanning
2970 *
2971 * Otherwise:
2972 *
2973 * Disable Scanning
2974 */
2975int hci_update_passive_scan_sync(struct hci_dev *hdev)
2976{
2977 int err;
2978
2979 if (!test_bit(HCI_UP, &hdev->flags) ||
2980 test_bit(HCI_INIT, &hdev->flags) ||
2981 hci_dev_test_flag(hdev, HCI_SETUP) ||
2982 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2983 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2984 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2985 return 0;
2986
2987 /* No point in doing scanning if LE support hasn't been enabled */
2988 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2989 return 0;
2990
2991 /* If discovery is active don't interfere with it */
2992 if (hdev->discovery.state != DISCOVERY_STOPPED)
2993 return 0;
2994
2995 /* Reset RSSI and UUID filters when starting background scanning
2996 * since these filters are meant for service discovery only.
2997 *
2998 * The Start Discovery and Start Service Discovery operations
2999 * ensure to set proper values for RSSI threshold and UUID
3000 * filter list. So it is safe to just reset them here.
3001 */
3002 hci_discovery_filter_clear(hdev);
3003
3004 bt_dev_dbg(hdev, "ADV monitoring is %s",
3005 hci_is_adv_monitoring(hdev) ? "on" : "off");
3006
3007 if (!hci_dev_test_flag(hdev, HCI_MESH) &&
3008 list_empty(&hdev->pend_le_conns) &&
3009 list_empty(&hdev->pend_le_reports) &&
3010 !hci_is_adv_monitoring(hdev) &&
3011 !hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
3012 /* If there is no pending LE connections or devices
3013 * to be scanned for or no ADV monitors, we should stop the
3014 * background scanning.
3015 */
3016
3017 bt_dev_dbg(hdev, "stopping background scanning");
3018
3019 err = hci_scan_disable_sync(hdev);
3020 if (err)
3021 bt_dev_err(hdev, "stop background scanning failed: %d",
3022 err);
3023 } else {
3024 /* If there is at least one pending LE connection, we should
3025 * keep the background scan running.
3026 */
3027
3028 /* If controller is connecting, we should not start scanning
3029 * since some controllers are not able to scan and connect at
3030 * the same time.
3031 */
3032 if (hci_lookup_le_connect(hdev))
3033 return 0;
3034
3035 bt_dev_dbg(hdev, "start background scanning");
3036
3037 err = hci_passive_scan_sync(hdev);
3038 if (err)
3039 bt_dev_err(hdev, "start background scanning failed: %d",
3040 err);
3041 }
3042
3043 return err;
3044}
3045
3046static int update_scan_sync(struct hci_dev *hdev, void *data)
3047{
3048 return hci_update_scan_sync(hdev);
3049}
3050
3051int hci_update_scan(struct hci_dev *hdev)
3052{
3053 return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL);
3054}
3055
3056static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
3057{
3058 return hci_update_passive_scan_sync(hdev);
3059}
3060
3061int hci_update_passive_scan(struct hci_dev *hdev)
3062{
3063 /* Only queue if it would have any effect */
3064 if (!test_bit(HCI_UP, &hdev->flags) ||
3065 test_bit(HCI_INIT, &hdev->flags) ||
3066 hci_dev_test_flag(hdev, HCI_SETUP) ||
3067 hci_dev_test_flag(hdev, HCI_CONFIG) ||
3068 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
3069 hci_dev_test_flag(hdev, HCI_UNREGISTER))
3070 return 0;
3071
3072 return hci_cmd_sync_queue_once(hdev, update_passive_scan_sync, NULL,
3073 NULL);
3074}
3075
3076int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
3077{
3078 int err;
3079
3080 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
3081 return 0;
3082
3083 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
3084 sizeof(val), &val, HCI_CMD_TIMEOUT);
3085
3086 if (!err) {
3087 if (val) {
3088 hdev->features[1][0] |= LMP_HOST_SC;
3089 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
3090 } else {
3091 hdev->features[1][0] &= ~LMP_HOST_SC;
3092 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
3093 }
3094 }
3095
3096 return err;
3097}
3098
3099int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
3100{
3101 int err;
3102
3103 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
3104 lmp_host_ssp_capable(hdev))
3105 return 0;
3106
3107 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
3108 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
3109 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3110 }
3111
3112 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3113 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3114 if (err)
3115 return err;
3116
3117 return hci_write_sc_support_sync(hdev, 0x01);
3118}
3119
3120int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
3121{
3122 struct hci_cp_write_le_host_supported cp;
3123
3124 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
3125 !lmp_bredr_capable(hdev))
3126 return 0;
3127
3128 /* Check first if we already have the right host state
3129 * (host features set)
3130 */
3131 if (le == lmp_host_le_capable(hdev) &&
3132 simul == lmp_host_le_br_capable(hdev))
3133 return 0;
3134
3135 memset(&cp, 0, sizeof(cp));
3136
3137 cp.le = le;
3138 cp.simul = simul;
3139
3140 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
3141 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3142}
3143
3144static int hci_powered_update_adv_sync(struct hci_dev *hdev)
3145{
3146 struct adv_info *adv, *tmp;
3147 int err;
3148
3149 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
3150 return 0;
3151
3152 /* If RPA Resolution has not been enable yet it means the
3153 * resolving list is empty and we should attempt to program the
3154 * local IRK in order to support using own_addr_type
3155 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
3156 */
3157 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
3158 hci_le_add_resolve_list_sync(hdev, NULL);
3159 hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
3160 }
3161
3162 /* Make sure the controller has a good default for
3163 * advertising data. This also applies to the case
3164 * where BR/EDR was toggled during the AUTO_OFF phase.
3165 */
3166 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
3167 list_empty(&hdev->adv_instances)) {
3168 if (ext_adv_capable(hdev)) {
3169 err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
3170 if (!err)
3171 hci_update_scan_rsp_data_sync(hdev, 0x00);
3172 } else {
3173 err = hci_update_adv_data_sync(hdev, 0x00);
3174 if (!err)
3175 hci_update_scan_rsp_data_sync(hdev, 0x00);
3176 }
3177
3178 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
3179 hci_enable_advertising_sync(hdev);
3180 }
3181
3182 /* Call for each tracked instance to be scheduled */
3183 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
3184 hci_schedule_adv_instance_sync(hdev, adv->instance, true);
3185
3186 return 0;
3187}
3188
3189static int hci_write_auth_enable_sync(struct hci_dev *hdev)
3190{
3191 u8 link_sec;
3192
3193 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
3194 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
3195 return 0;
3196
3197 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
3198 sizeof(link_sec), &link_sec,
3199 HCI_CMD_TIMEOUT);
3200}
3201
3202int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
3203{
3204 struct hci_cp_write_page_scan_activity cp;
3205 u8 type;
3206 int err = 0;
3207
3208 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3209 return 0;
3210
3211 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3212 return 0;
3213
3214 memset(&cp, 0, sizeof(cp));
3215
3216 if (enable) {
3217 type = PAGE_SCAN_TYPE_INTERLACED;
3218
3219 /* 160 msec page scan interval */
3220 cp.interval = cpu_to_le16(0x0100);
3221 } else {
3222 type = hdev->def_page_scan_type;
3223 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
3224 }
3225
3226 cp.window = cpu_to_le16(hdev->def_page_scan_window);
3227
3228 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
3229 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
3230 err = __hci_cmd_sync_status(hdev,
3231 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
3232 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3233 if (err)
3234 return err;
3235 }
3236
3237 if (hdev->page_scan_type != type)
3238 err = __hci_cmd_sync_status(hdev,
3239 HCI_OP_WRITE_PAGE_SCAN_TYPE,
3240 sizeof(type), &type,
3241 HCI_CMD_TIMEOUT);
3242
3243 return err;
3244}
3245
3246static bool disconnected_accept_list_entries(struct hci_dev *hdev)
3247{
3248 struct bdaddr_list *b;
3249
3250 list_for_each_entry(b, &hdev->accept_list, list) {
3251 struct hci_conn *conn;
3252
3253 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
3254 if (!conn)
3255 return true;
3256
3257 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3258 return true;
3259 }
3260
3261 return false;
3262}
3263
3264static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
3265{
3266 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
3267 sizeof(val), &val,
3268 HCI_CMD_TIMEOUT);
3269}
3270
3271int hci_update_scan_sync(struct hci_dev *hdev)
3272{
3273 u8 scan;
3274
3275 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3276 return 0;
3277
3278 if (!hdev_is_powered(hdev))
3279 return 0;
3280
3281 if (mgmt_powering_down(hdev))
3282 return 0;
3283
3284 if (hdev->scanning_paused)
3285 return 0;
3286
3287 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
3288 disconnected_accept_list_entries(hdev))
3289 scan = SCAN_PAGE;
3290 else
3291 scan = SCAN_DISABLED;
3292
3293 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
3294 scan |= SCAN_INQUIRY;
3295
3296 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
3297 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
3298 return 0;
3299
3300 return hci_write_scan_enable_sync(hdev, scan);
3301}
3302
3303int hci_update_name_sync(struct hci_dev *hdev)
3304{
3305 struct hci_cp_write_local_name cp;
3306
3307 memset(&cp, 0, sizeof(cp));
3308
3309 memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
3310
3311 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
3312 sizeof(cp), &cp,
3313 HCI_CMD_TIMEOUT);
3314}
3315
3316/* This function perform powered update HCI command sequence after the HCI init
3317 * sequence which end up resetting all states, the sequence is as follows:
3318 *
3319 * HCI_SSP_ENABLED(Enable SSP)
3320 * HCI_LE_ENABLED(Enable LE)
3321 * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
3322 * Update adv data)
3323 * Enable Authentication
3324 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
3325 * Set Name -> Set EIR)
3326 * HCI_FORCE_STATIC_ADDR | BDADDR_ANY && !HCI_BREDR_ENABLED (Set Static Address)
3327 */
3328int hci_powered_update_sync(struct hci_dev *hdev)
3329{
3330 int err;
3331
3332 /* Register the available SMP channels (BR/EDR and LE) only when
3333 * successfully powering on the controller. This late
3334 * registration is required so that LE SMP can clearly decide if
3335 * the public address or static address is used.
3336 */
3337 smp_register(hdev);
3338
3339 err = hci_write_ssp_mode_sync(hdev, 0x01);
3340 if (err)
3341 return err;
3342
3343 err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
3344 if (err)
3345 return err;
3346
3347 err = hci_powered_update_adv_sync(hdev);
3348 if (err)
3349 return err;
3350
3351 err = hci_write_auth_enable_sync(hdev);
3352 if (err)
3353 return err;
3354
3355 if (lmp_bredr_capable(hdev)) {
3356 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
3357 hci_write_fast_connectable_sync(hdev, true);
3358 else
3359 hci_write_fast_connectable_sync(hdev, false);
3360 hci_update_scan_sync(hdev);
3361 hci_update_class_sync(hdev);
3362 hci_update_name_sync(hdev);
3363 hci_update_eir_sync(hdev);
3364 }
3365
3366 /* If forcing static address is in use or there is no public
3367 * address use the static address as random address (but skip
3368 * the HCI command if the current random address is already the
3369 * static one.
3370 *
3371 * In case BR/EDR has been disabled on a dual-mode controller
3372 * and a static address has been configured, then use that
3373 * address instead of the public BR/EDR address.
3374 */
3375 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3376 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3377 !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))) {
3378 if (bacmp(&hdev->static_addr, BDADDR_ANY))
3379 return hci_set_random_addr_sync(hdev,
3380 &hdev->static_addr);
3381 }
3382
3383 return 0;
3384}
3385
3386/**
3387 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
3388 * (BD_ADDR) for a HCI device from
3389 * a firmware node property.
3390 * @hdev: The HCI device
3391 *
3392 * Search the firmware node for 'local-bd-address'.
3393 *
3394 * All-zero BD addresses are rejected, because those could be properties
3395 * that exist in the firmware tables, but were not updated by the firmware. For
3396 * example, the DTS could define 'local-bd-address', with zero BD addresses.
3397 */
3398static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
3399{
3400 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
3401 bdaddr_t ba;
3402 int ret;
3403
3404 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
3405 (u8 *)&ba, sizeof(ba));
3406 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
3407 return;
3408
3409 if (test_bit(HCI_QUIRK_BDADDR_PROPERTY_BROKEN, &hdev->quirks))
3410 baswap(&hdev->public_addr, &ba);
3411 else
3412 bacpy(&hdev->public_addr, &ba);
3413}
3414
3415struct hci_init_stage {
3416 int (*func)(struct hci_dev *hdev);
3417};
3418
3419/* Run init stage NULL terminated function table */
3420static int hci_init_stage_sync(struct hci_dev *hdev,
3421 const struct hci_init_stage *stage)
3422{
3423 size_t i;
3424
3425 for (i = 0; stage[i].func; i++) {
3426 int err;
3427
3428 err = stage[i].func(hdev);
3429 if (err)
3430 return err;
3431 }
3432
3433 return 0;
3434}
3435
3436/* Read Local Version */
3437static int hci_read_local_version_sync(struct hci_dev *hdev)
3438{
3439 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
3440 0, NULL, HCI_CMD_TIMEOUT);
3441}
3442
3443/* Read BD Address */
3444static int hci_read_bd_addr_sync(struct hci_dev *hdev)
3445{
3446 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
3447 0, NULL, HCI_CMD_TIMEOUT);
3448}
3449
3450#define HCI_INIT(_func) \
3451{ \
3452 .func = _func, \
3453}
3454
3455static const struct hci_init_stage hci_init0[] = {
3456 /* HCI_OP_READ_LOCAL_VERSION */
3457 HCI_INIT(hci_read_local_version_sync),
3458 /* HCI_OP_READ_BD_ADDR */
3459 HCI_INIT(hci_read_bd_addr_sync),
3460 {}
3461};
3462
3463int hci_reset_sync(struct hci_dev *hdev)
3464{
3465 int err;
3466
3467 set_bit(HCI_RESET, &hdev->flags);
3468
3469 err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
3470 HCI_CMD_TIMEOUT);
3471 if (err)
3472 return err;
3473
3474 return 0;
3475}
3476
3477static int hci_init0_sync(struct hci_dev *hdev)
3478{
3479 int err;
3480
3481 bt_dev_dbg(hdev, "");
3482
3483 /* Reset */
3484 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3485 err = hci_reset_sync(hdev);
3486 if (err)
3487 return err;
3488 }
3489
3490 return hci_init_stage_sync(hdev, hci_init0);
3491}
3492
3493static int hci_unconf_init_sync(struct hci_dev *hdev)
3494{
3495 int err;
3496
3497 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3498 return 0;
3499
3500 err = hci_init0_sync(hdev);
3501 if (err < 0)
3502 return err;
3503
3504 if (hci_dev_test_flag(hdev, HCI_SETUP))
3505 hci_debugfs_create_basic(hdev);
3506
3507 return 0;
3508}
3509
3510/* Read Local Supported Features. */
3511static int hci_read_local_features_sync(struct hci_dev *hdev)
3512{
3513 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
3514 0, NULL, HCI_CMD_TIMEOUT);
3515}
3516
3517/* BR Controller init stage 1 command sequence */
3518static const struct hci_init_stage br_init1[] = {
3519 /* HCI_OP_READ_LOCAL_FEATURES */
3520 HCI_INIT(hci_read_local_features_sync),
3521 /* HCI_OP_READ_LOCAL_VERSION */
3522 HCI_INIT(hci_read_local_version_sync),
3523 /* HCI_OP_READ_BD_ADDR */
3524 HCI_INIT(hci_read_bd_addr_sync),
3525 {}
3526};
3527
3528/* Read Local Commands */
3529static int hci_read_local_cmds_sync(struct hci_dev *hdev)
3530{
3531 /* All Bluetooth 1.2 and later controllers should support the
3532 * HCI command for reading the local supported commands.
3533 *
3534 * Unfortunately some controllers indicate Bluetooth 1.2 support,
3535 * but do not have support for this command. If that is the case,
3536 * the driver can quirk the behavior and skip reading the local
3537 * supported commands.
3538 */
3539 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
3540 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
3541 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
3542 0, NULL, HCI_CMD_TIMEOUT);
3543
3544 return 0;
3545}
3546
3547static int hci_init1_sync(struct hci_dev *hdev)
3548{
3549 int err;
3550
3551 bt_dev_dbg(hdev, "");
3552
3553 /* Reset */
3554 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3555 err = hci_reset_sync(hdev);
3556 if (err)
3557 return err;
3558 }
3559
3560 return hci_init_stage_sync(hdev, br_init1);
3561}
3562
3563/* Read Buffer Size (ACL mtu, max pkt, etc.) */
3564static int hci_read_buffer_size_sync(struct hci_dev *hdev)
3565{
3566 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
3567 0, NULL, HCI_CMD_TIMEOUT);
3568}
3569
3570/* Read Class of Device */
3571static int hci_read_dev_class_sync(struct hci_dev *hdev)
3572{
3573 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
3574 0, NULL, HCI_CMD_TIMEOUT);
3575}
3576
3577/* Read Local Name */
3578static int hci_read_local_name_sync(struct hci_dev *hdev)
3579{
3580 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
3581 0, NULL, HCI_CMD_TIMEOUT);
3582}
3583
3584/* Read Voice Setting */
3585static int hci_read_voice_setting_sync(struct hci_dev *hdev)
3586{
3587 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
3588 0, NULL, HCI_CMD_TIMEOUT);
3589}
3590
3591/* Read Number of Supported IAC */
3592static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
3593{
3594 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
3595 0, NULL, HCI_CMD_TIMEOUT);
3596}
3597
3598/* Read Current IAC LAP */
3599static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
3600{
3601 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
3602 0, NULL, HCI_CMD_TIMEOUT);
3603}
3604
3605static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
3606 u8 cond_type, bdaddr_t *bdaddr,
3607 u8 auto_accept)
3608{
3609 struct hci_cp_set_event_filter cp;
3610
3611 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3612 return 0;
3613
3614 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3615 return 0;
3616
3617 memset(&cp, 0, sizeof(cp));
3618 cp.flt_type = flt_type;
3619
3620 if (flt_type != HCI_FLT_CLEAR_ALL) {
3621 cp.cond_type = cond_type;
3622 bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
3623 cp.addr_conn_flt.auto_accept = auto_accept;
3624 }
3625
3626 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
3627 flt_type == HCI_FLT_CLEAR_ALL ?
3628 sizeof(cp.flt_type) : sizeof(cp), &cp,
3629 HCI_CMD_TIMEOUT);
3630}
3631
3632static int hci_clear_event_filter_sync(struct hci_dev *hdev)
3633{
3634 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
3635 return 0;
3636
3637 /* In theory the state machine should not reach here unless
3638 * a hci_set_event_filter_sync() call succeeds, but we do
3639 * the check both for parity and as a future reminder.
3640 */
3641 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3642 return 0;
3643
3644 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
3645 BDADDR_ANY, 0x00);
3646}
3647
3648/* Connection accept timeout ~20 secs */
3649static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
3650{
3651 __le16 param = cpu_to_le16(0x7d00);
3652
3653 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
3654 sizeof(param), ¶m, HCI_CMD_TIMEOUT);
3655}
3656
3657/* BR Controller init stage 2 command sequence */
3658static const struct hci_init_stage br_init2[] = {
3659 /* HCI_OP_READ_BUFFER_SIZE */
3660 HCI_INIT(hci_read_buffer_size_sync),
3661 /* HCI_OP_READ_CLASS_OF_DEV */
3662 HCI_INIT(hci_read_dev_class_sync),
3663 /* HCI_OP_READ_LOCAL_NAME */
3664 HCI_INIT(hci_read_local_name_sync),
3665 /* HCI_OP_READ_VOICE_SETTING */
3666 HCI_INIT(hci_read_voice_setting_sync),
3667 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
3668 HCI_INIT(hci_read_num_supported_iac_sync),
3669 /* HCI_OP_READ_CURRENT_IAC_LAP */
3670 HCI_INIT(hci_read_current_iac_lap_sync),
3671 /* HCI_OP_SET_EVENT_FLT */
3672 HCI_INIT(hci_clear_event_filter_sync),
3673 /* HCI_OP_WRITE_CA_TIMEOUT */
3674 HCI_INIT(hci_write_ca_timeout_sync),
3675 {}
3676};
3677
3678static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
3679{
3680 u8 mode = 0x01;
3681
3682 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3683 return 0;
3684
3685 /* When SSP is available, then the host features page
3686 * should also be available as well. However some
3687 * controllers list the max_page as 0 as long as SSP
3688 * has not been enabled. To achieve proper debugging
3689 * output, force the minimum max_page to 1 at least.
3690 */
3691 hdev->max_page = 0x01;
3692
3693 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3694 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3695}
3696
3697static int hci_write_eir_sync(struct hci_dev *hdev)
3698{
3699 struct hci_cp_write_eir cp;
3700
3701 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3702 return 0;
3703
3704 memset(hdev->eir, 0, sizeof(hdev->eir));
3705 memset(&cp, 0, sizeof(cp));
3706
3707 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
3708 HCI_CMD_TIMEOUT);
3709}
3710
3711static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
3712{
3713 u8 mode;
3714
3715 if (!lmp_inq_rssi_capable(hdev) &&
3716 !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3717 return 0;
3718
3719 /* If Extended Inquiry Result events are supported, then
3720 * they are clearly preferred over Inquiry Result with RSSI
3721 * events.
3722 */
3723 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
3724
3725 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
3726 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3727}
3728
3729static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
3730{
3731 if (!lmp_inq_tx_pwr_capable(hdev))
3732 return 0;
3733
3734 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
3735 0, NULL, HCI_CMD_TIMEOUT);
3736}
3737
3738static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
3739{
3740 struct hci_cp_read_local_ext_features cp;
3741
3742 if (!lmp_ext_feat_capable(hdev))
3743 return 0;
3744
3745 memset(&cp, 0, sizeof(cp));
3746 cp.page = page;
3747
3748 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
3749 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3750}
3751
3752static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
3753{
3754 return hci_read_local_ext_features_sync(hdev, 0x01);
3755}
3756
3757/* HCI Controller init stage 2 command sequence */
3758static const struct hci_init_stage hci_init2[] = {
3759 /* HCI_OP_READ_LOCAL_COMMANDS */
3760 HCI_INIT(hci_read_local_cmds_sync),
3761 /* HCI_OP_WRITE_SSP_MODE */
3762 HCI_INIT(hci_write_ssp_mode_1_sync),
3763 /* HCI_OP_WRITE_EIR */
3764 HCI_INIT(hci_write_eir_sync),
3765 /* HCI_OP_WRITE_INQUIRY_MODE */
3766 HCI_INIT(hci_write_inquiry_mode_sync),
3767 /* HCI_OP_READ_INQ_RSP_TX_POWER */
3768 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
3769 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3770 HCI_INIT(hci_read_local_ext_features_1_sync),
3771 /* HCI_OP_WRITE_AUTH_ENABLE */
3772 HCI_INIT(hci_write_auth_enable_sync),
3773 {}
3774};
3775
3776/* Read LE Buffer Size */
3777static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
3778{
3779 /* Use Read LE Buffer Size V2 if supported */
3780 if (iso_capable(hdev) && hdev->commands[41] & 0x20)
3781 return __hci_cmd_sync_status(hdev,
3782 HCI_OP_LE_READ_BUFFER_SIZE_V2,
3783 0, NULL, HCI_CMD_TIMEOUT);
3784
3785 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
3786 0, NULL, HCI_CMD_TIMEOUT);
3787}
3788
3789/* Read LE Local Supported Features */
3790static int hci_le_read_local_features_sync(struct hci_dev *hdev)
3791{
3792 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
3793 0, NULL, HCI_CMD_TIMEOUT);
3794}
3795
3796/* Read LE Supported States */
3797static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
3798{
3799 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
3800 0, NULL, HCI_CMD_TIMEOUT);
3801}
3802
3803/* LE Controller init stage 2 command sequence */
3804static const struct hci_init_stage le_init2[] = {
3805 /* HCI_OP_LE_READ_LOCAL_FEATURES */
3806 HCI_INIT(hci_le_read_local_features_sync),
3807 /* HCI_OP_LE_READ_BUFFER_SIZE */
3808 HCI_INIT(hci_le_read_buffer_size_sync),
3809 /* HCI_OP_LE_READ_SUPPORTED_STATES */
3810 HCI_INIT(hci_le_read_supported_states_sync),
3811 {}
3812};
3813
3814static int hci_init2_sync(struct hci_dev *hdev)
3815{
3816 int err;
3817
3818 bt_dev_dbg(hdev, "");
3819
3820 err = hci_init_stage_sync(hdev, hci_init2);
3821 if (err)
3822 return err;
3823
3824 if (lmp_bredr_capable(hdev)) {
3825 err = hci_init_stage_sync(hdev, br_init2);
3826 if (err)
3827 return err;
3828 } else {
3829 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
3830 }
3831
3832 if (lmp_le_capable(hdev)) {
3833 err = hci_init_stage_sync(hdev, le_init2);
3834 if (err)
3835 return err;
3836 /* LE-only controllers have LE implicitly enabled */
3837 if (!lmp_bredr_capable(hdev))
3838 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
3839 }
3840
3841 return 0;
3842}
3843
3844static int hci_set_event_mask_sync(struct hci_dev *hdev)
3845{
3846 /* The second byte is 0xff instead of 0x9f (two reserved bits
3847 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
3848 * command otherwise.
3849 */
3850 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
3851
3852 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
3853 * any event mask for pre 1.2 devices.
3854 */
3855 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3856 return 0;
3857
3858 if (lmp_bredr_capable(hdev)) {
3859 events[4] |= 0x01; /* Flow Specification Complete */
3860
3861 /* Don't set Disconnect Complete and mode change when
3862 * suspended as that would wakeup the host when disconnecting
3863 * due to suspend.
3864 */
3865 if (hdev->suspended) {
3866 events[0] &= 0xef;
3867 events[2] &= 0xf7;
3868 }
3869 } else {
3870 /* Use a different default for LE-only devices */
3871 memset(events, 0, sizeof(events));
3872 events[1] |= 0x20; /* Command Complete */
3873 events[1] |= 0x40; /* Command Status */
3874 events[1] |= 0x80; /* Hardware Error */
3875
3876 /* If the controller supports the Disconnect command, enable
3877 * the corresponding event. In addition enable packet flow
3878 * control related events.
3879 */
3880 if (hdev->commands[0] & 0x20) {
3881 /* Don't set Disconnect Complete when suspended as that
3882 * would wakeup the host when disconnecting due to
3883 * suspend.
3884 */
3885 if (!hdev->suspended)
3886 events[0] |= 0x10; /* Disconnection Complete */
3887 events[2] |= 0x04; /* Number of Completed Packets */
3888 events[3] |= 0x02; /* Data Buffer Overflow */
3889 }
3890
3891 /* If the controller supports the Read Remote Version
3892 * Information command, enable the corresponding event.
3893 */
3894 if (hdev->commands[2] & 0x80)
3895 events[1] |= 0x08; /* Read Remote Version Information
3896 * Complete
3897 */
3898
3899 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
3900 events[0] |= 0x80; /* Encryption Change */
3901 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3902 }
3903 }
3904
3905 if (lmp_inq_rssi_capable(hdev) ||
3906 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3907 events[4] |= 0x02; /* Inquiry Result with RSSI */
3908
3909 if (lmp_ext_feat_capable(hdev))
3910 events[4] |= 0x04; /* Read Remote Extended Features Complete */
3911
3912 if (lmp_esco_capable(hdev)) {
3913 events[5] |= 0x08; /* Synchronous Connection Complete */
3914 events[5] |= 0x10; /* Synchronous Connection Changed */
3915 }
3916
3917 if (lmp_sniffsubr_capable(hdev))
3918 events[5] |= 0x20; /* Sniff Subrating */
3919
3920 if (lmp_pause_enc_capable(hdev))
3921 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3922
3923 if (lmp_ext_inq_capable(hdev))
3924 events[5] |= 0x40; /* Extended Inquiry Result */
3925
3926 if (lmp_no_flush_capable(hdev))
3927 events[7] |= 0x01; /* Enhanced Flush Complete */
3928
3929 if (lmp_lsto_capable(hdev))
3930 events[6] |= 0x80; /* Link Supervision Timeout Changed */
3931
3932 if (lmp_ssp_capable(hdev)) {
3933 events[6] |= 0x01; /* IO Capability Request */
3934 events[6] |= 0x02; /* IO Capability Response */
3935 events[6] |= 0x04; /* User Confirmation Request */
3936 events[6] |= 0x08; /* User Passkey Request */
3937 events[6] |= 0x10; /* Remote OOB Data Request */
3938 events[6] |= 0x20; /* Simple Pairing Complete */
3939 events[7] |= 0x04; /* User Passkey Notification */
3940 events[7] |= 0x08; /* Keypress Notification */
3941 events[7] |= 0x10; /* Remote Host Supported
3942 * Features Notification
3943 */
3944 }
3945
3946 if (lmp_le_capable(hdev))
3947 events[7] |= 0x20; /* LE Meta-Event */
3948
3949 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
3950 sizeof(events), events, HCI_CMD_TIMEOUT);
3951}
3952
3953static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
3954{
3955 struct hci_cp_read_stored_link_key cp;
3956
3957 if (!(hdev->commands[6] & 0x20) ||
3958 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
3959 return 0;
3960
3961 memset(&cp, 0, sizeof(cp));
3962 bacpy(&cp.bdaddr, BDADDR_ANY);
3963 cp.read_all = 0x01;
3964
3965 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
3966 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3967}
3968
3969static int hci_setup_link_policy_sync(struct hci_dev *hdev)
3970{
3971 struct hci_cp_write_def_link_policy cp;
3972 u16 link_policy = 0;
3973
3974 if (!(hdev->commands[5] & 0x10))
3975 return 0;
3976
3977 memset(&cp, 0, sizeof(cp));
3978
3979 if (lmp_rswitch_capable(hdev))
3980 link_policy |= HCI_LP_RSWITCH;
3981 if (lmp_hold_capable(hdev))
3982 link_policy |= HCI_LP_HOLD;
3983 if (lmp_sniff_capable(hdev))
3984 link_policy |= HCI_LP_SNIFF;
3985 if (lmp_park_capable(hdev))
3986 link_policy |= HCI_LP_PARK;
3987
3988 cp.policy = cpu_to_le16(link_policy);
3989
3990 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
3991 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3992}
3993
3994static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
3995{
3996 if (!(hdev->commands[8] & 0x01))
3997 return 0;
3998
3999 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
4000 0, NULL, HCI_CMD_TIMEOUT);
4001}
4002
4003static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
4004{
4005 if (!(hdev->commands[18] & 0x04) ||
4006 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4007 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
4008 return 0;
4009
4010 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4011 0, NULL, HCI_CMD_TIMEOUT);
4012}
4013
4014static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
4015{
4016 /* Some older Broadcom based Bluetooth 1.2 controllers do not
4017 * support the Read Page Scan Type command. Check support for
4018 * this command in the bit mask of supported commands.
4019 */
4020 if (!(hdev->commands[13] & 0x01))
4021 return 0;
4022
4023 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
4024 0, NULL, HCI_CMD_TIMEOUT);
4025}
4026
4027/* Read features beyond page 1 if available */
4028static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
4029{
4030 u8 page;
4031 int err;
4032
4033 if (!lmp_ext_feat_capable(hdev))
4034 return 0;
4035
4036 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
4037 page++) {
4038 err = hci_read_local_ext_features_sync(hdev, page);
4039 if (err)
4040 return err;
4041 }
4042
4043 return 0;
4044}
4045
4046/* HCI Controller init stage 3 command sequence */
4047static const struct hci_init_stage hci_init3[] = {
4048 /* HCI_OP_SET_EVENT_MASK */
4049 HCI_INIT(hci_set_event_mask_sync),
4050 /* HCI_OP_READ_STORED_LINK_KEY */
4051 HCI_INIT(hci_read_stored_link_key_sync),
4052 /* HCI_OP_WRITE_DEF_LINK_POLICY */
4053 HCI_INIT(hci_setup_link_policy_sync),
4054 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
4055 HCI_INIT(hci_read_page_scan_activity_sync),
4056 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
4057 HCI_INIT(hci_read_def_err_data_reporting_sync),
4058 /* HCI_OP_READ_PAGE_SCAN_TYPE */
4059 HCI_INIT(hci_read_page_scan_type_sync),
4060 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
4061 HCI_INIT(hci_read_local_ext_features_all_sync),
4062 {}
4063};
4064
4065static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
4066{
4067 u8 events[8];
4068
4069 if (!lmp_le_capable(hdev))
4070 return 0;
4071
4072 memset(events, 0, sizeof(events));
4073
4074 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
4075 events[0] |= 0x10; /* LE Long Term Key Request */
4076
4077 /* If controller supports the Connection Parameters Request
4078 * Link Layer Procedure, enable the corresponding event.
4079 */
4080 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
4081 /* LE Remote Connection Parameter Request */
4082 events[0] |= 0x20;
4083
4084 /* If the controller supports the Data Length Extension
4085 * feature, enable the corresponding event.
4086 */
4087 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
4088 events[0] |= 0x40; /* LE Data Length Change */
4089
4090 /* If the controller supports LL Privacy feature or LE Extended Adv,
4091 * enable the corresponding event.
4092 */
4093 if (use_enhanced_conn_complete(hdev))
4094 events[1] |= 0x02; /* LE Enhanced Connection Complete */
4095
4096 /* If the controller supports Extended Scanner Filter
4097 * Policies, enable the corresponding event.
4098 */
4099 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
4100 events[1] |= 0x04; /* LE Direct Advertising Report */
4101
4102 /* If the controller supports Channel Selection Algorithm #2
4103 * feature, enable the corresponding event.
4104 */
4105 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
4106 events[2] |= 0x08; /* LE Channel Selection Algorithm */
4107
4108 /* If the controller supports the LE Set Scan Enable command,
4109 * enable the corresponding advertising report event.
4110 */
4111 if (hdev->commands[26] & 0x08)
4112 events[0] |= 0x02; /* LE Advertising Report */
4113
4114 /* If the controller supports the LE Create Connection
4115 * command, enable the corresponding event.
4116 */
4117 if (hdev->commands[26] & 0x10)
4118 events[0] |= 0x01; /* LE Connection Complete */
4119
4120 /* If the controller supports the LE Connection Update
4121 * command, enable the corresponding event.
4122 */
4123 if (hdev->commands[27] & 0x04)
4124 events[0] |= 0x04; /* LE Connection Update Complete */
4125
4126 /* If the controller supports the LE Read Remote Used Features
4127 * command, enable the corresponding event.
4128 */
4129 if (hdev->commands[27] & 0x20)
4130 /* LE Read Remote Used Features Complete */
4131 events[0] |= 0x08;
4132
4133 /* If the controller supports the LE Read Local P-256
4134 * Public Key command, enable the corresponding event.
4135 */
4136 if (hdev->commands[34] & 0x02)
4137 /* LE Read Local P-256 Public Key Complete */
4138 events[0] |= 0x80;
4139
4140 /* If the controller supports the LE Generate DHKey
4141 * command, enable the corresponding event.
4142 */
4143 if (hdev->commands[34] & 0x04)
4144 events[1] |= 0x01; /* LE Generate DHKey Complete */
4145
4146 /* If the controller supports the LE Set Default PHY or
4147 * LE Set PHY commands, enable the corresponding event.
4148 */
4149 if (hdev->commands[35] & (0x20 | 0x40))
4150 events[1] |= 0x08; /* LE PHY Update Complete */
4151
4152 /* If the controller supports LE Set Extended Scan Parameters
4153 * and LE Set Extended Scan Enable commands, enable the
4154 * corresponding event.
4155 */
4156 if (use_ext_scan(hdev))
4157 events[1] |= 0x10; /* LE Extended Advertising Report */
4158
4159 /* If the controller supports the LE Extended Advertising
4160 * command, enable the corresponding event.
4161 */
4162 if (ext_adv_capable(hdev))
4163 events[2] |= 0x02; /* LE Advertising Set Terminated */
4164
4165 if (cis_capable(hdev)) {
4166 events[3] |= 0x01; /* LE CIS Established */
4167 if (cis_peripheral_capable(hdev))
4168 events[3] |= 0x02; /* LE CIS Request */
4169 }
4170
4171 if (bis_capable(hdev)) {
4172 events[1] |= 0x20; /* LE PA Report */
4173 events[1] |= 0x40; /* LE PA Sync Established */
4174 events[3] |= 0x04; /* LE Create BIG Complete */
4175 events[3] |= 0x08; /* LE Terminate BIG Complete */
4176 events[3] |= 0x10; /* LE BIG Sync Established */
4177 events[3] |= 0x20; /* LE BIG Sync Loss */
4178 events[4] |= 0x02; /* LE BIG Info Advertising Report */
4179 }
4180
4181 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
4182 sizeof(events), events, HCI_CMD_TIMEOUT);
4183}
4184
4185/* Read LE Advertising Channel TX Power */
4186static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
4187{
4188 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
4189 /* HCI TS spec forbids mixing of legacy and extended
4190 * advertising commands wherein READ_ADV_TX_POWER is
4191 * also included. So do not call it if extended adv
4192 * is supported otherwise controller will return
4193 * COMMAND_DISALLOWED for extended commands.
4194 */
4195 return __hci_cmd_sync_status(hdev,
4196 HCI_OP_LE_READ_ADV_TX_POWER,
4197 0, NULL, HCI_CMD_TIMEOUT);
4198 }
4199
4200 return 0;
4201}
4202
4203/* Read LE Min/Max Tx Power*/
4204static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
4205{
4206 if (!(hdev->commands[38] & 0x80) ||
4207 test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
4208 return 0;
4209
4210 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
4211 0, NULL, HCI_CMD_TIMEOUT);
4212}
4213
4214/* Read LE Accept List Size */
4215static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
4216{
4217 if (!(hdev->commands[26] & 0x40))
4218 return 0;
4219
4220 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4221 0, NULL, HCI_CMD_TIMEOUT);
4222}
4223
4224/* Read LE Resolving List Size */
4225static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
4226{
4227 if (!(hdev->commands[34] & 0x40))
4228 return 0;
4229
4230 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
4231 0, NULL, HCI_CMD_TIMEOUT);
4232}
4233
4234/* Clear LE Resolving List */
4235static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
4236{
4237 if (!(hdev->commands[34] & 0x20))
4238 return 0;
4239
4240 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
4241 HCI_CMD_TIMEOUT);
4242}
4243
4244/* Set RPA timeout */
4245static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
4246{
4247 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
4248
4249 if (!(hdev->commands[35] & 0x04) ||
4250 test_bit(HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT, &hdev->quirks))
4251 return 0;
4252
4253 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
4254 sizeof(timeout), &timeout,
4255 HCI_CMD_TIMEOUT);
4256}
4257
4258/* Read LE Maximum Data Length */
4259static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
4260{
4261 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4262 return 0;
4263
4264 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
4265 HCI_CMD_TIMEOUT);
4266}
4267
4268/* Read LE Suggested Default Data Length */
4269static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
4270{
4271 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4272 return 0;
4273
4274 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
4275 HCI_CMD_TIMEOUT);
4276}
4277
4278/* Read LE Number of Supported Advertising Sets */
4279static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
4280{
4281 if (!ext_adv_capable(hdev))
4282 return 0;
4283
4284 return __hci_cmd_sync_status(hdev,
4285 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4286 0, NULL, HCI_CMD_TIMEOUT);
4287}
4288
4289/* Write LE Host Supported */
4290static int hci_set_le_support_sync(struct hci_dev *hdev)
4291{
4292 struct hci_cp_write_le_host_supported cp;
4293
4294 /* LE-only devices do not support explicit enablement */
4295 if (!lmp_bredr_capable(hdev))
4296 return 0;
4297
4298 memset(&cp, 0, sizeof(cp));
4299
4300 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
4301 cp.le = 0x01;
4302 cp.simul = 0x00;
4303 }
4304
4305 if (cp.le == lmp_host_le_capable(hdev))
4306 return 0;
4307
4308 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
4309 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4310}
4311
4312/* LE Set Host Feature */
4313static int hci_le_set_host_feature_sync(struct hci_dev *hdev)
4314{
4315 struct hci_cp_le_set_host_feature cp;
4316
4317 if (!cis_capable(hdev))
4318 return 0;
4319
4320 memset(&cp, 0, sizeof(cp));
4321
4322 /* Connected Isochronous Channels (Host Support) */
4323 cp.bit_number = 32;
4324 cp.bit_value = 1;
4325
4326 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE,
4327 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4328}
4329
4330/* LE Controller init stage 3 command sequence */
4331static const struct hci_init_stage le_init3[] = {
4332 /* HCI_OP_LE_SET_EVENT_MASK */
4333 HCI_INIT(hci_le_set_event_mask_sync),
4334 /* HCI_OP_LE_READ_ADV_TX_POWER */
4335 HCI_INIT(hci_le_read_adv_tx_power_sync),
4336 /* HCI_OP_LE_READ_TRANSMIT_POWER */
4337 HCI_INIT(hci_le_read_tx_power_sync),
4338 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
4339 HCI_INIT(hci_le_read_accept_list_size_sync),
4340 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
4341 HCI_INIT(hci_le_clear_accept_list_sync),
4342 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
4343 HCI_INIT(hci_le_read_resolv_list_size_sync),
4344 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
4345 HCI_INIT(hci_le_clear_resolv_list_sync),
4346 /* HCI_OP_LE_SET_RPA_TIMEOUT */
4347 HCI_INIT(hci_le_set_rpa_timeout_sync),
4348 /* HCI_OP_LE_READ_MAX_DATA_LEN */
4349 HCI_INIT(hci_le_read_max_data_len_sync),
4350 /* HCI_OP_LE_READ_DEF_DATA_LEN */
4351 HCI_INIT(hci_le_read_def_data_len_sync),
4352 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
4353 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
4354 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
4355 HCI_INIT(hci_set_le_support_sync),
4356 /* HCI_OP_LE_SET_HOST_FEATURE */
4357 HCI_INIT(hci_le_set_host_feature_sync),
4358 {}
4359};
4360
4361static int hci_init3_sync(struct hci_dev *hdev)
4362{
4363 int err;
4364
4365 bt_dev_dbg(hdev, "");
4366
4367 err = hci_init_stage_sync(hdev, hci_init3);
4368 if (err)
4369 return err;
4370
4371 if (lmp_le_capable(hdev))
4372 return hci_init_stage_sync(hdev, le_init3);
4373
4374 return 0;
4375}
4376
4377static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
4378{
4379 struct hci_cp_delete_stored_link_key cp;
4380
4381 /* Some Broadcom based Bluetooth controllers do not support the
4382 * Delete Stored Link Key command. They are clearly indicating its
4383 * absence in the bit mask of supported commands.
4384 *
4385 * Check the supported commands and only if the command is marked
4386 * as supported send it. If not supported assume that the controller
4387 * does not have actual support for stored link keys which makes this
4388 * command redundant anyway.
4389 *
4390 * Some controllers indicate that they support handling deleting
4391 * stored link keys, but they don't. The quirk lets a driver
4392 * just disable this command.
4393 */
4394 if (!(hdev->commands[6] & 0x80) ||
4395 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
4396 return 0;
4397
4398 memset(&cp, 0, sizeof(cp));
4399 bacpy(&cp.bdaddr, BDADDR_ANY);
4400 cp.delete_all = 0x01;
4401
4402 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
4403 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4404}
4405
4406static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
4407{
4408 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
4409 bool changed = false;
4410
4411 /* Set event mask page 2 if the HCI command for it is supported */
4412 if (!(hdev->commands[22] & 0x04))
4413 return 0;
4414
4415 /* If Connectionless Peripheral Broadcast central role is supported
4416 * enable all necessary events for it.
4417 */
4418 if (lmp_cpb_central_capable(hdev)) {
4419 events[1] |= 0x40; /* Triggered Clock Capture */
4420 events[1] |= 0x80; /* Synchronization Train Complete */
4421 events[2] |= 0x08; /* Truncated Page Complete */
4422 events[2] |= 0x20; /* CPB Channel Map Change */
4423 changed = true;
4424 }
4425
4426 /* If Connectionless Peripheral Broadcast peripheral role is supported
4427 * enable all necessary events for it.
4428 */
4429 if (lmp_cpb_peripheral_capable(hdev)) {
4430 events[2] |= 0x01; /* Synchronization Train Received */
4431 events[2] |= 0x02; /* CPB Receive */
4432 events[2] |= 0x04; /* CPB Timeout */
4433 events[2] |= 0x10; /* Peripheral Page Response Timeout */
4434 changed = true;
4435 }
4436
4437 /* Enable Authenticated Payload Timeout Expired event if supported */
4438 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
4439 events[2] |= 0x80;
4440 changed = true;
4441 }
4442
4443 /* Some Broadcom based controllers indicate support for Set Event
4444 * Mask Page 2 command, but then actually do not support it. Since
4445 * the default value is all bits set to zero, the command is only
4446 * required if the event mask has to be changed. In case no change
4447 * to the event mask is needed, skip this command.
4448 */
4449 if (!changed)
4450 return 0;
4451
4452 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
4453 sizeof(events), events, HCI_CMD_TIMEOUT);
4454}
4455
4456/* Read local codec list if the HCI command is supported */
4457static int hci_read_local_codecs_sync(struct hci_dev *hdev)
4458{
4459 if (hdev->commands[45] & 0x04)
4460 hci_read_supported_codecs_v2(hdev);
4461 else if (hdev->commands[29] & 0x20)
4462 hci_read_supported_codecs(hdev);
4463
4464 return 0;
4465}
4466
4467/* Read local pairing options if the HCI command is supported */
4468static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
4469{
4470 if (!(hdev->commands[41] & 0x08))
4471 return 0;
4472
4473 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
4474 0, NULL, HCI_CMD_TIMEOUT);
4475}
4476
4477/* Get MWS transport configuration if the HCI command is supported */
4478static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
4479{
4480 if (!mws_transport_config_capable(hdev))
4481 return 0;
4482
4483 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
4484 0, NULL, HCI_CMD_TIMEOUT);
4485}
4486
4487/* Check for Synchronization Train support */
4488static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
4489{
4490 if (!lmp_sync_train_capable(hdev))
4491 return 0;
4492
4493 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
4494 0, NULL, HCI_CMD_TIMEOUT);
4495}
4496
4497/* Enable Secure Connections if supported and configured */
4498static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
4499{
4500 u8 support = 0x01;
4501
4502 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
4503 !bredr_sc_enabled(hdev))
4504 return 0;
4505
4506 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
4507 sizeof(support), &support,
4508 HCI_CMD_TIMEOUT);
4509}
4510
4511/* Set erroneous data reporting if supported to the wideband speech
4512 * setting value
4513 */
4514static int hci_set_err_data_report_sync(struct hci_dev *hdev)
4515{
4516 struct hci_cp_write_def_err_data_reporting cp;
4517 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
4518
4519 if (!(hdev->commands[18] & 0x08) ||
4520 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4521 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
4522 return 0;
4523
4524 if (enabled == hdev->err_data_reporting)
4525 return 0;
4526
4527 memset(&cp, 0, sizeof(cp));
4528 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
4529 ERR_DATA_REPORTING_DISABLED;
4530
4531 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4532 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4533}
4534
4535static const struct hci_init_stage hci_init4[] = {
4536 /* HCI_OP_DELETE_STORED_LINK_KEY */
4537 HCI_INIT(hci_delete_stored_link_key_sync),
4538 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
4539 HCI_INIT(hci_set_event_mask_page_2_sync),
4540 /* HCI_OP_READ_LOCAL_CODECS */
4541 HCI_INIT(hci_read_local_codecs_sync),
4542 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
4543 HCI_INIT(hci_read_local_pairing_opts_sync),
4544 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
4545 HCI_INIT(hci_get_mws_transport_config_sync),
4546 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
4547 HCI_INIT(hci_read_sync_train_params_sync),
4548 /* HCI_OP_WRITE_SC_SUPPORT */
4549 HCI_INIT(hci_write_sc_support_1_sync),
4550 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
4551 HCI_INIT(hci_set_err_data_report_sync),
4552 {}
4553};
4554
4555/* Set Suggested Default Data Length to maximum if supported */
4556static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
4557{
4558 struct hci_cp_le_write_def_data_len cp;
4559
4560 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4561 return 0;
4562
4563 memset(&cp, 0, sizeof(cp));
4564 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
4565 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
4566
4567 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
4568 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4569}
4570
4571/* Set Default PHY parameters if command is supported, enables all supported
4572 * PHYs according to the LE Features bits.
4573 */
4574static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
4575{
4576 struct hci_cp_le_set_default_phy cp;
4577
4578 if (!(hdev->commands[35] & 0x20)) {
4579 /* If the command is not supported it means only 1M PHY is
4580 * supported.
4581 */
4582 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
4583 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
4584 return 0;
4585 }
4586
4587 memset(&cp, 0, sizeof(cp));
4588 cp.all_phys = 0x00;
4589 cp.tx_phys = HCI_LE_SET_PHY_1M;
4590 cp.rx_phys = HCI_LE_SET_PHY_1M;
4591
4592 /* Enables 2M PHY if supported */
4593 if (le_2m_capable(hdev)) {
4594 cp.tx_phys |= HCI_LE_SET_PHY_2M;
4595 cp.rx_phys |= HCI_LE_SET_PHY_2M;
4596 }
4597
4598 /* Enables Coded PHY if supported */
4599 if (le_coded_capable(hdev)) {
4600 cp.tx_phys |= HCI_LE_SET_PHY_CODED;
4601 cp.rx_phys |= HCI_LE_SET_PHY_CODED;
4602 }
4603
4604 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
4605 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4606}
4607
4608static const struct hci_init_stage le_init4[] = {
4609 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
4610 HCI_INIT(hci_le_set_write_def_data_len_sync),
4611 /* HCI_OP_LE_SET_DEFAULT_PHY */
4612 HCI_INIT(hci_le_set_default_phy_sync),
4613 {}
4614};
4615
4616static int hci_init4_sync(struct hci_dev *hdev)
4617{
4618 int err;
4619
4620 bt_dev_dbg(hdev, "");
4621
4622 err = hci_init_stage_sync(hdev, hci_init4);
4623 if (err)
4624 return err;
4625
4626 if (lmp_le_capable(hdev))
4627 return hci_init_stage_sync(hdev, le_init4);
4628
4629 return 0;
4630}
4631
4632static int hci_init_sync(struct hci_dev *hdev)
4633{
4634 int err;
4635
4636 err = hci_init1_sync(hdev);
4637 if (err < 0)
4638 return err;
4639
4640 if (hci_dev_test_flag(hdev, HCI_SETUP))
4641 hci_debugfs_create_basic(hdev);
4642
4643 err = hci_init2_sync(hdev);
4644 if (err < 0)
4645 return err;
4646
4647 err = hci_init3_sync(hdev);
4648 if (err < 0)
4649 return err;
4650
4651 err = hci_init4_sync(hdev);
4652 if (err < 0)
4653 return err;
4654
4655 /* This function is only called when the controller is actually in
4656 * configured state. When the controller is marked as unconfigured,
4657 * this initialization procedure is not run.
4658 *
4659 * It means that it is possible that a controller runs through its
4660 * setup phase and then discovers missing settings. If that is the
4661 * case, then this function will not be called. It then will only
4662 * be called during the config phase.
4663 *
4664 * So only when in setup phase or config phase, create the debugfs
4665 * entries and register the SMP channels.
4666 */
4667 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4668 !hci_dev_test_flag(hdev, HCI_CONFIG))
4669 return 0;
4670
4671 if (hci_dev_test_and_set_flag(hdev, HCI_DEBUGFS_CREATED))
4672 return 0;
4673
4674 hci_debugfs_create_common(hdev);
4675
4676 if (lmp_bredr_capable(hdev))
4677 hci_debugfs_create_bredr(hdev);
4678
4679 if (lmp_le_capable(hdev))
4680 hci_debugfs_create_le(hdev);
4681
4682 return 0;
4683}
4684
4685#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
4686
4687static const struct {
4688 unsigned long quirk;
4689 const char *desc;
4690} hci_broken_table[] = {
4691 HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
4692 "HCI Read Local Supported Commands not supported"),
4693 HCI_QUIRK_BROKEN(STORED_LINK_KEY,
4694 "HCI Delete Stored Link Key command is advertised, "
4695 "but not supported."),
4696 HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
4697 "HCI Read Default Erroneous Data Reporting command is "
4698 "advertised, but not supported."),
4699 HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
4700 "HCI Read Transmit Power Level command is advertised, "
4701 "but not supported."),
4702 HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
4703 "HCI Set Event Filter command not supported."),
4704 HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
4705 "HCI Enhanced Setup Synchronous Connection command is "
4706 "advertised, but not supported."),
4707 HCI_QUIRK_BROKEN(SET_RPA_TIMEOUT,
4708 "HCI LE Set Random Private Address Timeout command is "
4709 "advertised, but not supported."),
4710 HCI_QUIRK_BROKEN(LE_CODED,
4711 "HCI LE Coded PHY feature bit is set, "
4712 "but its usage is not supported.")
4713};
4714
4715/* This function handles hdev setup stage:
4716 *
4717 * Calls hdev->setup
4718 * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set.
4719 */
4720static int hci_dev_setup_sync(struct hci_dev *hdev)
4721{
4722 int ret = 0;
4723 bool invalid_bdaddr;
4724 size_t i;
4725
4726 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4727 !test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks))
4728 return 0;
4729
4730 bt_dev_dbg(hdev, "");
4731
4732 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
4733
4734 if (hdev->setup)
4735 ret = hdev->setup(hdev);
4736
4737 for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
4738 if (test_bit(hci_broken_table[i].quirk, &hdev->quirks))
4739 bt_dev_warn(hdev, "%s", hci_broken_table[i].desc);
4740 }
4741
4742 /* The transport driver can set the quirk to mark the
4743 * BD_ADDR invalid before creating the HCI device or in
4744 * its setup callback.
4745 */
4746 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
4747 test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
4748 if (!ret) {
4749 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks) &&
4750 !bacmp(&hdev->public_addr, BDADDR_ANY))
4751 hci_dev_get_bd_addr_from_property(hdev);
4752
4753 if (invalid_bdaddr && bacmp(&hdev->public_addr, BDADDR_ANY) &&
4754 hdev->set_bdaddr) {
4755 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4756 if (!ret)
4757 invalid_bdaddr = false;
4758 }
4759 }
4760
4761 /* The transport driver can set these quirks before
4762 * creating the HCI device or in its setup callback.
4763 *
4764 * For the invalid BD_ADDR quirk it is possible that
4765 * it becomes a valid address if the bootloader does
4766 * provide it (see above).
4767 *
4768 * In case any of them is set, the controller has to
4769 * start up as unconfigured.
4770 */
4771 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
4772 invalid_bdaddr)
4773 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
4774
4775 /* For an unconfigured controller it is required to
4776 * read at least the version information provided by
4777 * the Read Local Version Information command.
4778 *
4779 * If the set_bdaddr driver callback is provided, then
4780 * also the original Bluetooth public device address
4781 * will be read using the Read BD Address command.
4782 */
4783 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4784 return hci_unconf_init_sync(hdev);
4785
4786 return ret;
4787}
4788
4789/* This function handles hdev init stage:
4790 *
4791 * Calls hci_dev_setup_sync to perform setup stage
4792 * Calls hci_init_sync to perform HCI command init sequence
4793 */
4794static int hci_dev_init_sync(struct hci_dev *hdev)
4795{
4796 int ret;
4797
4798 bt_dev_dbg(hdev, "");
4799
4800 atomic_set(&hdev->cmd_cnt, 1);
4801 set_bit(HCI_INIT, &hdev->flags);
4802
4803 ret = hci_dev_setup_sync(hdev);
4804
4805 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
4806 /* If public address change is configured, ensure that
4807 * the address gets programmed. If the driver does not
4808 * support changing the public address, fail the power
4809 * on procedure.
4810 */
4811 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
4812 hdev->set_bdaddr)
4813 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4814 else
4815 ret = -EADDRNOTAVAIL;
4816 }
4817
4818 if (!ret) {
4819 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4820 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4821 ret = hci_init_sync(hdev);
4822 if (!ret && hdev->post_init)
4823 ret = hdev->post_init(hdev);
4824 }
4825 }
4826
4827 /* If the HCI Reset command is clearing all diagnostic settings,
4828 * then they need to be reprogrammed after the init procedure
4829 * completed.
4830 */
4831 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
4832 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4833 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
4834 ret = hdev->set_diag(hdev, true);
4835
4836 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4837 msft_do_open(hdev);
4838 aosp_do_open(hdev);
4839 }
4840
4841 clear_bit(HCI_INIT, &hdev->flags);
4842
4843 return ret;
4844}
4845
4846int hci_dev_open_sync(struct hci_dev *hdev)
4847{
4848 int ret;
4849
4850 bt_dev_dbg(hdev, "");
4851
4852 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
4853 ret = -ENODEV;
4854 goto done;
4855 }
4856
4857 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4858 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
4859 /* Check for rfkill but allow the HCI setup stage to
4860 * proceed (which in itself doesn't cause any RF activity).
4861 */
4862 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
4863 ret = -ERFKILL;
4864 goto done;
4865 }
4866
4867 /* Check for valid public address or a configured static
4868 * random address, but let the HCI setup proceed to
4869 * be able to determine if there is a public address
4870 * or not.
4871 *
4872 * In case of user channel usage, it is not important
4873 * if a public address or static random address is
4874 * available.
4875 */
4876 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4877 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
4878 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
4879 ret = -EADDRNOTAVAIL;
4880 goto done;
4881 }
4882 }
4883
4884 if (test_bit(HCI_UP, &hdev->flags)) {
4885 ret = -EALREADY;
4886 goto done;
4887 }
4888
4889 if (hdev->open(hdev)) {
4890 ret = -EIO;
4891 goto done;
4892 }
4893
4894 hci_devcd_reset(hdev);
4895
4896 set_bit(HCI_RUNNING, &hdev->flags);
4897 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
4898
4899 ret = hci_dev_init_sync(hdev);
4900 if (!ret) {
4901 hci_dev_hold(hdev);
4902 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
4903 hci_adv_instances_set_rpa_expired(hdev, true);
4904 set_bit(HCI_UP, &hdev->flags);
4905 hci_sock_dev_event(hdev, HCI_DEV_UP);
4906 hci_leds_update_powered(hdev, true);
4907 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4908 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
4909 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4910 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4911 hci_dev_test_flag(hdev, HCI_MGMT)) {
4912 ret = hci_powered_update_sync(hdev);
4913 mgmt_power_on(hdev, ret);
4914 }
4915 } else {
4916 /* Init failed, cleanup */
4917 flush_work(&hdev->tx_work);
4918
4919 /* Since hci_rx_work() is possible to awake new cmd_work
4920 * it should be flushed first to avoid unexpected call of
4921 * hci_cmd_work()
4922 */
4923 flush_work(&hdev->rx_work);
4924 flush_work(&hdev->cmd_work);
4925
4926 skb_queue_purge(&hdev->cmd_q);
4927 skb_queue_purge(&hdev->rx_q);
4928
4929 if (hdev->flush)
4930 hdev->flush(hdev);
4931
4932 if (hdev->sent_cmd) {
4933 cancel_delayed_work_sync(&hdev->cmd_timer);
4934 kfree_skb(hdev->sent_cmd);
4935 hdev->sent_cmd = NULL;
4936 }
4937
4938 if (hdev->req_skb) {
4939 kfree_skb(hdev->req_skb);
4940 hdev->req_skb = NULL;
4941 }
4942
4943 clear_bit(HCI_RUNNING, &hdev->flags);
4944 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4945
4946 hdev->close(hdev);
4947 hdev->flags &= BIT(HCI_RAW);
4948 }
4949
4950done:
4951 return ret;
4952}
4953
4954/* This function requires the caller holds hdev->lock */
4955static void hci_pend_le_actions_clear(struct hci_dev *hdev)
4956{
4957 struct hci_conn_params *p;
4958
4959 list_for_each_entry(p, &hdev->le_conn_params, list) {
4960 hci_pend_le_list_del_init(p);
4961 if (p->conn) {
4962 hci_conn_drop(p->conn);
4963 hci_conn_put(p->conn);
4964 p->conn = NULL;
4965 }
4966 }
4967
4968 BT_DBG("All LE pending actions cleared");
4969}
4970
4971static int hci_dev_shutdown(struct hci_dev *hdev)
4972{
4973 int err = 0;
4974 /* Similar to how we first do setup and then set the exclusive access
4975 * bit for userspace, we must first unset userchannel and then clean up.
4976 * Otherwise, the kernel can't properly use the hci channel to clean up
4977 * the controller (some shutdown routines require sending additional
4978 * commands to the controller for example).
4979 */
4980 bool was_userchannel =
4981 hci_dev_test_and_clear_flag(hdev, HCI_USER_CHANNEL);
4982
4983 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
4984 test_bit(HCI_UP, &hdev->flags)) {
4985 /* Execute vendor specific shutdown routine */
4986 if (hdev->shutdown)
4987 err = hdev->shutdown(hdev);
4988 }
4989
4990 if (was_userchannel)
4991 hci_dev_set_flag(hdev, HCI_USER_CHANNEL);
4992
4993 return err;
4994}
4995
4996int hci_dev_close_sync(struct hci_dev *hdev)
4997{
4998 bool auto_off;
4999 int err = 0;
5000
5001 bt_dev_dbg(hdev, "");
5002
5003 cancel_delayed_work(&hdev->power_off);
5004 cancel_delayed_work(&hdev->ncmd_timer);
5005 cancel_delayed_work(&hdev->le_scan_disable);
5006
5007 hci_request_cancel_all(hdev);
5008
5009 if (hdev->adv_instance_timeout) {
5010 cancel_delayed_work_sync(&hdev->adv_instance_expire);
5011 hdev->adv_instance_timeout = 0;
5012 }
5013
5014 err = hci_dev_shutdown(hdev);
5015
5016 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
5017 cancel_delayed_work_sync(&hdev->cmd_timer);
5018 return err;
5019 }
5020
5021 hci_leds_update_powered(hdev, false);
5022
5023 /* Flush RX and TX works */
5024 flush_work(&hdev->tx_work);
5025 flush_work(&hdev->rx_work);
5026
5027 if (hdev->discov_timeout > 0) {
5028 hdev->discov_timeout = 0;
5029 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
5030 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
5031 }
5032
5033 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
5034 cancel_delayed_work(&hdev->service_cache);
5035
5036 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
5037 struct adv_info *adv_instance;
5038
5039 cancel_delayed_work_sync(&hdev->rpa_expired);
5040
5041 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
5042 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
5043 }
5044
5045 /* Avoid potential lockdep warnings from the *_flush() calls by
5046 * ensuring the workqueue is empty up front.
5047 */
5048 drain_workqueue(hdev->workqueue);
5049
5050 hci_dev_lock(hdev);
5051
5052 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
5053
5054 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
5055
5056 if (!auto_off && !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5057 hci_dev_test_flag(hdev, HCI_MGMT))
5058 __mgmt_power_off(hdev);
5059
5060 hci_inquiry_cache_flush(hdev);
5061 hci_pend_le_actions_clear(hdev);
5062 hci_conn_hash_flush(hdev);
5063 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
5064 smp_unregister(hdev);
5065 hci_dev_unlock(hdev);
5066
5067 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
5068
5069 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5070 aosp_do_close(hdev);
5071 msft_do_close(hdev);
5072 }
5073
5074 if (hdev->flush)
5075 hdev->flush(hdev);
5076
5077 /* Reset device */
5078 skb_queue_purge(&hdev->cmd_q);
5079 atomic_set(&hdev->cmd_cnt, 1);
5080 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
5081 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
5082 set_bit(HCI_INIT, &hdev->flags);
5083 hci_reset_sync(hdev);
5084 clear_bit(HCI_INIT, &hdev->flags);
5085 }
5086
5087 /* flush cmd work */
5088 flush_work(&hdev->cmd_work);
5089
5090 /* Drop queues */
5091 skb_queue_purge(&hdev->rx_q);
5092 skb_queue_purge(&hdev->cmd_q);
5093 skb_queue_purge(&hdev->raw_q);
5094
5095 /* Drop last sent command */
5096 if (hdev->sent_cmd) {
5097 cancel_delayed_work_sync(&hdev->cmd_timer);
5098 kfree_skb(hdev->sent_cmd);
5099 hdev->sent_cmd = NULL;
5100 }
5101
5102 /* Drop last request */
5103 if (hdev->req_skb) {
5104 kfree_skb(hdev->req_skb);
5105 hdev->req_skb = NULL;
5106 }
5107
5108 clear_bit(HCI_RUNNING, &hdev->flags);
5109 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
5110
5111 /* After this point our queues are empty and no tasks are scheduled. */
5112 hdev->close(hdev);
5113
5114 /* Clear flags */
5115 hdev->flags &= BIT(HCI_RAW);
5116 hci_dev_clear_volatile_flags(hdev);
5117
5118 memset(hdev->eir, 0, sizeof(hdev->eir));
5119 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
5120 bacpy(&hdev->random_addr, BDADDR_ANY);
5121 hci_codec_list_clear(&hdev->local_codecs);
5122
5123 hci_dev_put(hdev);
5124 return err;
5125}
5126
5127/* This function perform power on HCI command sequence as follows:
5128 *
5129 * If controller is already up (HCI_UP) performs hci_powered_update_sync
5130 * sequence otherwise run hci_dev_open_sync which will follow with
5131 * hci_powered_update_sync after the init sequence is completed.
5132 */
5133static int hci_power_on_sync(struct hci_dev *hdev)
5134{
5135 int err;
5136
5137 if (test_bit(HCI_UP, &hdev->flags) &&
5138 hci_dev_test_flag(hdev, HCI_MGMT) &&
5139 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
5140 cancel_delayed_work(&hdev->power_off);
5141 return hci_powered_update_sync(hdev);
5142 }
5143
5144 err = hci_dev_open_sync(hdev);
5145 if (err < 0)
5146 return err;
5147
5148 /* During the HCI setup phase, a few error conditions are
5149 * ignored and they need to be checked now. If they are still
5150 * valid, it is important to return the device back off.
5151 */
5152 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
5153 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
5154 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
5155 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
5156 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
5157 hci_dev_close_sync(hdev);
5158 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
5159 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
5160 HCI_AUTO_OFF_TIMEOUT);
5161 }
5162
5163 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
5164 /* For unconfigured devices, set the HCI_RAW flag
5165 * so that userspace can easily identify them.
5166 */
5167 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5168 set_bit(HCI_RAW, &hdev->flags);
5169
5170 /* For fully configured devices, this will send
5171 * the Index Added event. For unconfigured devices,
5172 * it will send Unconfigued Index Added event.
5173 *
5174 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
5175 * and no event will be send.
5176 */
5177 mgmt_index_added(hdev);
5178 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
5179 /* When the controller is now configured, then it
5180 * is important to clear the HCI_RAW flag.
5181 */
5182 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5183 clear_bit(HCI_RAW, &hdev->flags);
5184
5185 /* Powering on the controller with HCI_CONFIG set only
5186 * happens with the transition from unconfigured to
5187 * configured. This will send the Index Added event.
5188 */
5189 mgmt_index_added(hdev);
5190 }
5191
5192 return 0;
5193}
5194
5195static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
5196{
5197 struct hci_cp_remote_name_req_cancel cp;
5198
5199 memset(&cp, 0, sizeof(cp));
5200 bacpy(&cp.bdaddr, addr);
5201
5202 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
5203 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5204}
5205
5206int hci_stop_discovery_sync(struct hci_dev *hdev)
5207{
5208 struct discovery_state *d = &hdev->discovery;
5209 struct inquiry_entry *e;
5210 int err;
5211
5212 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
5213
5214 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
5215 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
5216 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
5217 0, NULL, HCI_CMD_TIMEOUT);
5218 if (err)
5219 return err;
5220 }
5221
5222 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5223 cancel_delayed_work(&hdev->le_scan_disable);
5224
5225 err = hci_scan_disable_sync(hdev);
5226 if (err)
5227 return err;
5228 }
5229
5230 } else {
5231 err = hci_scan_disable_sync(hdev);
5232 if (err)
5233 return err;
5234 }
5235
5236 /* Resume advertising if it was paused */
5237 if (use_ll_privacy(hdev))
5238 hci_resume_advertising_sync(hdev);
5239
5240 /* No further actions needed for LE-only discovery */
5241 if (d->type == DISCOV_TYPE_LE)
5242 return 0;
5243
5244 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
5245 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
5246 NAME_PENDING);
5247 if (!e)
5248 return 0;
5249
5250 return hci_remote_name_cancel_sync(hdev, &e->data.bdaddr);
5251 }
5252
5253 return 0;
5254}
5255
5256static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
5257 u8 reason)
5258{
5259 struct hci_cp_disconnect cp;
5260
5261 if (test_bit(HCI_CONN_BIG_CREATED, &conn->flags)) {
5262 /* This is a BIS connection, hci_conn_del will
5263 * do the necessary cleanup.
5264 */
5265 hci_dev_lock(hdev);
5266 hci_conn_failed(conn, reason);
5267 hci_dev_unlock(hdev);
5268
5269 return 0;
5270 }
5271
5272 memset(&cp, 0, sizeof(cp));
5273 cp.handle = cpu_to_le16(conn->handle);
5274 cp.reason = reason;
5275
5276 /* Wait for HCI_EV_DISCONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5277 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5278 * used when suspending or powering off, where we don't want to wait
5279 * for the peer's response.
5280 */
5281 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5282 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
5283 sizeof(cp), &cp,
5284 HCI_EV_DISCONN_COMPLETE,
5285 HCI_CMD_TIMEOUT, NULL);
5286
5287 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
5288 HCI_CMD_TIMEOUT);
5289}
5290
5291static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
5292 struct hci_conn *conn, u8 reason)
5293{
5294 /* Return reason if scanning since the connection shall probably be
5295 * cleanup directly.
5296 */
5297 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
5298 return reason;
5299
5300 if (conn->role == HCI_ROLE_SLAVE ||
5301 test_and_set_bit(HCI_CONN_CANCEL, &conn->flags))
5302 return 0;
5303
5304 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
5305 0, NULL, HCI_CMD_TIMEOUT);
5306}
5307
5308static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn,
5309 u8 reason)
5310{
5311 if (conn->type == LE_LINK)
5312 return hci_le_connect_cancel_sync(hdev, conn, reason);
5313
5314 if (conn->type == ISO_LINK) {
5315 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
5316 * page 1857:
5317 *
5318 * If this command is issued for a CIS on the Central and the
5319 * CIS is successfully terminated before being established,
5320 * then an HCI_LE_CIS_Established event shall also be sent for
5321 * this CIS with the Status Operation Cancelled by Host (0x44).
5322 */
5323 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
5324 return hci_disconnect_sync(hdev, conn, reason);
5325
5326 /* CIS with no Create CIS sent have nothing to cancel */
5327 if (bacmp(&conn->dst, BDADDR_ANY))
5328 return HCI_ERROR_LOCAL_HOST_TERM;
5329
5330 /* There is no way to cancel a BIS without terminating the BIG
5331 * which is done later on connection cleanup.
5332 */
5333 return 0;
5334 }
5335
5336 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
5337 return 0;
5338
5339 /* Wait for HCI_EV_CONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5340 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5341 * used when suspending or powering off, where we don't want to wait
5342 * for the peer's response.
5343 */
5344 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5345 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN_CANCEL,
5346 6, &conn->dst,
5347 HCI_EV_CONN_COMPLETE,
5348 HCI_CMD_TIMEOUT, NULL);
5349
5350 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
5351 6, &conn->dst, HCI_CMD_TIMEOUT);
5352}
5353
5354static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
5355 u8 reason)
5356{
5357 struct hci_cp_reject_sync_conn_req cp;
5358
5359 memset(&cp, 0, sizeof(cp));
5360 bacpy(&cp.bdaddr, &conn->dst);
5361 cp.reason = reason;
5362
5363 /* SCO rejection has its own limited set of
5364 * allowed error values (0x0D-0x0F).
5365 */
5366 if (reason < 0x0d || reason > 0x0f)
5367 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
5368
5369 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
5370 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5371}
5372
5373static int hci_le_reject_cis_sync(struct hci_dev *hdev, struct hci_conn *conn,
5374 u8 reason)
5375{
5376 struct hci_cp_le_reject_cis cp;
5377
5378 memset(&cp, 0, sizeof(cp));
5379 cp.handle = cpu_to_le16(conn->handle);
5380 cp.reason = reason;
5381
5382 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REJECT_CIS,
5383 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5384}
5385
5386static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
5387 u8 reason)
5388{
5389 struct hci_cp_reject_conn_req cp;
5390
5391 if (conn->type == ISO_LINK)
5392 return hci_le_reject_cis_sync(hdev, conn, reason);
5393
5394 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
5395 return hci_reject_sco_sync(hdev, conn, reason);
5396
5397 memset(&cp, 0, sizeof(cp));
5398 bacpy(&cp.bdaddr, &conn->dst);
5399 cp.reason = reason;
5400
5401 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
5402 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5403}
5404
5405int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
5406{
5407 int err = 0;
5408 u16 handle = conn->handle;
5409 bool disconnect = false;
5410 struct hci_conn *c;
5411
5412 switch (conn->state) {
5413 case BT_CONNECTED:
5414 case BT_CONFIG:
5415 err = hci_disconnect_sync(hdev, conn, reason);
5416 break;
5417 case BT_CONNECT:
5418 err = hci_connect_cancel_sync(hdev, conn, reason);
5419 break;
5420 case BT_CONNECT2:
5421 err = hci_reject_conn_sync(hdev, conn, reason);
5422 break;
5423 case BT_OPEN:
5424 case BT_BOUND:
5425 break;
5426 default:
5427 disconnect = true;
5428 break;
5429 }
5430
5431 hci_dev_lock(hdev);
5432
5433 /* Check if the connection has been cleaned up concurrently */
5434 c = hci_conn_hash_lookup_handle(hdev, handle);
5435 if (!c || c != conn) {
5436 err = 0;
5437 goto unlock;
5438 }
5439
5440 /* Cleanup hci_conn object if it cannot be cancelled as it
5441 * likelly means the controller and host stack are out of sync
5442 * or in case of LE it was still scanning so it can be cleanup
5443 * safely.
5444 */
5445 if (disconnect) {
5446 conn->state = BT_CLOSED;
5447 hci_disconn_cfm(conn, reason);
5448 hci_conn_del(conn);
5449 } else {
5450 hci_conn_failed(conn, reason);
5451 }
5452
5453unlock:
5454 hci_dev_unlock(hdev);
5455 return err;
5456}
5457
5458static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
5459{
5460 struct list_head *head = &hdev->conn_hash.list;
5461 struct hci_conn *conn;
5462
5463 rcu_read_lock();
5464 while ((conn = list_first_or_null_rcu(head, struct hci_conn, list))) {
5465 /* Make sure the connection is not freed while unlocking */
5466 conn = hci_conn_get(conn);
5467 rcu_read_unlock();
5468 /* Disregard possible errors since hci_conn_del shall have been
5469 * called even in case of errors had occurred since it would
5470 * then cause hci_conn_failed to be called which calls
5471 * hci_conn_del internally.
5472 */
5473 hci_abort_conn_sync(hdev, conn, reason);
5474 hci_conn_put(conn);
5475 rcu_read_lock();
5476 }
5477 rcu_read_unlock();
5478
5479 return 0;
5480}
5481
5482/* This function perform power off HCI command sequence as follows:
5483 *
5484 * Clear Advertising
5485 * Stop Discovery
5486 * Disconnect all connections
5487 * hci_dev_close_sync
5488 */
5489static int hci_power_off_sync(struct hci_dev *hdev)
5490{
5491 int err;
5492
5493 /* If controller is already down there is nothing to do */
5494 if (!test_bit(HCI_UP, &hdev->flags))
5495 return 0;
5496
5497 hci_dev_set_flag(hdev, HCI_POWERING_DOWN);
5498
5499 if (test_bit(HCI_ISCAN, &hdev->flags) ||
5500 test_bit(HCI_PSCAN, &hdev->flags)) {
5501 err = hci_write_scan_enable_sync(hdev, 0x00);
5502 if (err)
5503 goto out;
5504 }
5505
5506 err = hci_clear_adv_sync(hdev, NULL, false);
5507 if (err)
5508 goto out;
5509
5510 err = hci_stop_discovery_sync(hdev);
5511 if (err)
5512 goto out;
5513
5514 /* Terminated due to Power Off */
5515 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5516 if (err)
5517 goto out;
5518
5519 err = hci_dev_close_sync(hdev);
5520
5521out:
5522 hci_dev_clear_flag(hdev, HCI_POWERING_DOWN);
5523 return err;
5524}
5525
5526int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
5527{
5528 if (val)
5529 return hci_power_on_sync(hdev);
5530
5531 return hci_power_off_sync(hdev);
5532}
5533
5534static int hci_write_iac_sync(struct hci_dev *hdev)
5535{
5536 struct hci_cp_write_current_iac_lap cp;
5537
5538 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
5539 return 0;
5540
5541 memset(&cp, 0, sizeof(cp));
5542
5543 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
5544 /* Limited discoverable mode */
5545 cp.num_iac = min_t(u8, hdev->num_iac, 2);
5546 cp.iac_lap[0] = 0x00; /* LIAC */
5547 cp.iac_lap[1] = 0x8b;
5548 cp.iac_lap[2] = 0x9e;
5549 cp.iac_lap[3] = 0x33; /* GIAC */
5550 cp.iac_lap[4] = 0x8b;
5551 cp.iac_lap[5] = 0x9e;
5552 } else {
5553 /* General discoverable mode */
5554 cp.num_iac = 1;
5555 cp.iac_lap[0] = 0x33; /* GIAC */
5556 cp.iac_lap[1] = 0x8b;
5557 cp.iac_lap[2] = 0x9e;
5558 }
5559
5560 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
5561 (cp.num_iac * 3) + 1, &cp,
5562 HCI_CMD_TIMEOUT);
5563}
5564
5565int hci_update_discoverable_sync(struct hci_dev *hdev)
5566{
5567 int err = 0;
5568
5569 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
5570 err = hci_write_iac_sync(hdev);
5571 if (err)
5572 return err;
5573
5574 err = hci_update_scan_sync(hdev);
5575 if (err)
5576 return err;
5577
5578 err = hci_update_class_sync(hdev);
5579 if (err)
5580 return err;
5581 }
5582
5583 /* Advertising instances don't use the global discoverable setting, so
5584 * only update AD if advertising was enabled using Set Advertising.
5585 */
5586 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
5587 err = hci_update_adv_data_sync(hdev, 0x00);
5588 if (err)
5589 return err;
5590
5591 /* Discoverable mode affects the local advertising
5592 * address in limited privacy mode.
5593 */
5594 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
5595 if (ext_adv_capable(hdev))
5596 err = hci_start_ext_adv_sync(hdev, 0x00);
5597 else
5598 err = hci_enable_advertising_sync(hdev);
5599 }
5600 }
5601
5602 return err;
5603}
5604
5605static int update_discoverable_sync(struct hci_dev *hdev, void *data)
5606{
5607 return hci_update_discoverable_sync(hdev);
5608}
5609
5610int hci_update_discoverable(struct hci_dev *hdev)
5611{
5612 /* Only queue if it would have any effect */
5613 if (hdev_is_powered(hdev) &&
5614 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
5615 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
5616 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
5617 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
5618 NULL);
5619
5620 return 0;
5621}
5622
5623int hci_update_connectable_sync(struct hci_dev *hdev)
5624{
5625 int err;
5626
5627 err = hci_update_scan_sync(hdev);
5628 if (err)
5629 return err;
5630
5631 /* If BR/EDR is not enabled and we disable advertising as a
5632 * by-product of disabling connectable, we need to update the
5633 * advertising flags.
5634 */
5635 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5636 err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
5637
5638 /* Update the advertising parameters if necessary */
5639 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
5640 !list_empty(&hdev->adv_instances)) {
5641 if (ext_adv_capable(hdev))
5642 err = hci_start_ext_adv_sync(hdev,
5643 hdev->cur_adv_instance);
5644 else
5645 err = hci_enable_advertising_sync(hdev);
5646
5647 if (err)
5648 return err;
5649 }
5650
5651 return hci_update_passive_scan_sync(hdev);
5652}
5653
5654static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
5655{
5656 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
5657 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
5658 struct hci_cp_inquiry cp;
5659
5660 bt_dev_dbg(hdev, "");
5661
5662 if (test_bit(HCI_INQUIRY, &hdev->flags))
5663 return 0;
5664
5665 hci_dev_lock(hdev);
5666 hci_inquiry_cache_flush(hdev);
5667 hci_dev_unlock(hdev);
5668
5669 memset(&cp, 0, sizeof(cp));
5670
5671 if (hdev->discovery.limited)
5672 memcpy(&cp.lap, liac, sizeof(cp.lap));
5673 else
5674 memcpy(&cp.lap, giac, sizeof(cp.lap));
5675
5676 cp.length = length;
5677
5678 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
5679 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5680}
5681
5682static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
5683{
5684 u8 own_addr_type;
5685 /* Accept list is not used for discovery */
5686 u8 filter_policy = 0x00;
5687 /* Default is to enable duplicates filter */
5688 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
5689 int err;
5690
5691 bt_dev_dbg(hdev, "");
5692
5693 /* If controller is scanning, it means the passive scanning is
5694 * running. Thus, we should temporarily stop it in order to set the
5695 * discovery scanning parameters.
5696 */
5697 err = hci_scan_disable_sync(hdev);
5698 if (err) {
5699 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
5700 return err;
5701 }
5702
5703 cancel_interleave_scan(hdev);
5704
5705 /* Pause address resolution for active scan and stop advertising if
5706 * privacy is enabled.
5707 */
5708 err = hci_pause_addr_resolution(hdev);
5709 if (err)
5710 goto failed;
5711
5712 /* All active scans will be done with either a resolvable private
5713 * address (when privacy feature has been enabled) or non-resolvable
5714 * private address.
5715 */
5716 err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
5717 &own_addr_type);
5718 if (err < 0)
5719 own_addr_type = ADDR_LE_DEV_PUBLIC;
5720
5721 if (hci_is_adv_monitoring(hdev) ||
5722 (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
5723 hdev->discovery.result_filtering)) {
5724 /* Duplicate filter should be disabled when some advertisement
5725 * monitor is activated, otherwise AdvMon can only receive one
5726 * advertisement for one peer(*) during active scanning, and
5727 * might report loss to these peers.
5728 *
5729 * If controller does strict duplicate filtering and the
5730 * discovery requires result filtering disables controller based
5731 * filtering since that can cause reports that would match the
5732 * host filter to not be reported.
5733 */
5734 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
5735 }
5736
5737 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
5738 hdev->le_scan_window_discovery,
5739 own_addr_type, filter_policy, filter_dup);
5740 if (!err)
5741 return err;
5742
5743failed:
5744 /* Resume advertising if it was paused */
5745 if (use_ll_privacy(hdev))
5746 hci_resume_advertising_sync(hdev);
5747
5748 /* Resume passive scanning */
5749 hci_update_passive_scan_sync(hdev);
5750 return err;
5751}
5752
5753static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
5754{
5755 int err;
5756
5757 bt_dev_dbg(hdev, "");
5758
5759 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
5760 if (err)
5761 return err;
5762
5763 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5764}
5765
5766int hci_start_discovery_sync(struct hci_dev *hdev)
5767{
5768 unsigned long timeout;
5769 int err;
5770
5771 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
5772
5773 switch (hdev->discovery.type) {
5774 case DISCOV_TYPE_BREDR:
5775 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5776 case DISCOV_TYPE_INTERLEAVED:
5777 /* When running simultaneous discovery, the LE scanning time
5778 * should occupy the whole discovery time sine BR/EDR inquiry
5779 * and LE scanning are scheduled by the controller.
5780 *
5781 * For interleaving discovery in comparison, BR/EDR inquiry
5782 * and LE scanning are done sequentially with separate
5783 * timeouts.
5784 */
5785 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
5786 &hdev->quirks)) {
5787 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5788 /* During simultaneous discovery, we double LE scan
5789 * interval. We must leave some time for the controller
5790 * to do BR/EDR inquiry.
5791 */
5792 err = hci_start_interleaved_discovery_sync(hdev);
5793 break;
5794 }
5795
5796 timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
5797 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5798 break;
5799 case DISCOV_TYPE_LE:
5800 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5801 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5802 break;
5803 default:
5804 return -EINVAL;
5805 }
5806
5807 if (err)
5808 return err;
5809
5810 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
5811
5812 queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
5813 timeout);
5814 return 0;
5815}
5816
5817static void hci_suspend_monitor_sync(struct hci_dev *hdev)
5818{
5819 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5820 case HCI_ADV_MONITOR_EXT_MSFT:
5821 msft_suspend_sync(hdev);
5822 break;
5823 default:
5824 return;
5825 }
5826}
5827
5828/* This function disables discovery and mark it as paused */
5829static int hci_pause_discovery_sync(struct hci_dev *hdev)
5830{
5831 int old_state = hdev->discovery.state;
5832 int err;
5833
5834 /* If discovery already stopped/stopping/paused there nothing to do */
5835 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
5836 hdev->discovery_paused)
5837 return 0;
5838
5839 hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
5840 err = hci_stop_discovery_sync(hdev);
5841 if (err)
5842 return err;
5843
5844 hdev->discovery_paused = true;
5845 hdev->discovery_old_state = old_state;
5846 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
5847
5848 return 0;
5849}
5850
5851static int hci_update_event_filter_sync(struct hci_dev *hdev)
5852{
5853 struct bdaddr_list_with_flags *b;
5854 u8 scan = SCAN_DISABLED;
5855 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
5856 int err;
5857
5858 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5859 return 0;
5860
5861 /* Some fake CSR controllers lock up after setting this type of
5862 * filter, so avoid sending the request altogether.
5863 */
5864 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
5865 return 0;
5866
5867 /* Always clear event filter when starting */
5868 hci_clear_event_filter_sync(hdev);
5869
5870 list_for_each_entry(b, &hdev->accept_list, list) {
5871 if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
5872 continue;
5873
5874 bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
5875
5876 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
5877 HCI_CONN_SETUP_ALLOW_BDADDR,
5878 &b->bdaddr,
5879 HCI_CONN_SETUP_AUTO_ON);
5880 if (err)
5881 bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
5882 &b->bdaddr);
5883 else
5884 scan = SCAN_PAGE;
5885 }
5886
5887 if (scan && !scanning)
5888 hci_write_scan_enable_sync(hdev, scan);
5889 else if (!scan && scanning)
5890 hci_write_scan_enable_sync(hdev, scan);
5891
5892 return 0;
5893}
5894
5895/* This function disables scan (BR and LE) and mark it as paused */
5896static int hci_pause_scan_sync(struct hci_dev *hdev)
5897{
5898 if (hdev->scanning_paused)
5899 return 0;
5900
5901 /* Disable page scan if enabled */
5902 if (test_bit(HCI_PSCAN, &hdev->flags))
5903 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
5904
5905 hci_scan_disable_sync(hdev);
5906
5907 hdev->scanning_paused = true;
5908
5909 return 0;
5910}
5911
5912/* This function performs the HCI suspend procedures in the follow order:
5913 *
5914 * Pause discovery (active scanning/inquiry)
5915 * Pause Directed Advertising/Advertising
5916 * Pause Scanning (passive scanning in case discovery was not active)
5917 * Disconnect all connections
5918 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
5919 * otherwise:
5920 * Update event mask (only set events that are allowed to wake up the host)
5921 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
5922 * Update passive scanning (lower duty cycle)
5923 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
5924 */
5925int hci_suspend_sync(struct hci_dev *hdev)
5926{
5927 int err;
5928
5929 /* If marked as suspended there nothing to do */
5930 if (hdev->suspended)
5931 return 0;
5932
5933 /* Mark device as suspended */
5934 hdev->suspended = true;
5935
5936 /* Pause discovery if not already stopped */
5937 hci_pause_discovery_sync(hdev);
5938
5939 /* Pause other advertisements */
5940 hci_pause_advertising_sync(hdev);
5941
5942 /* Suspend monitor filters */
5943 hci_suspend_monitor_sync(hdev);
5944
5945 /* Prevent disconnects from causing scanning to be re-enabled */
5946 hci_pause_scan_sync(hdev);
5947
5948 if (hci_conn_count(hdev)) {
5949 /* Soft disconnect everything (power off) */
5950 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5951 if (err) {
5952 /* Set state to BT_RUNNING so resume doesn't notify */
5953 hdev->suspend_state = BT_RUNNING;
5954 hci_resume_sync(hdev);
5955 return err;
5956 }
5957
5958 /* Update event mask so only the allowed event can wakeup the
5959 * host.
5960 */
5961 hci_set_event_mask_sync(hdev);
5962 }
5963
5964 /* Only configure accept list if disconnect succeeded and wake
5965 * isn't being prevented.
5966 */
5967 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
5968 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
5969 return 0;
5970 }
5971
5972 /* Unpause to take care of updating scanning params */
5973 hdev->scanning_paused = false;
5974
5975 /* Enable event filter for paired devices */
5976 hci_update_event_filter_sync(hdev);
5977
5978 /* Update LE passive scan if enabled */
5979 hci_update_passive_scan_sync(hdev);
5980
5981 /* Pause scan changes again. */
5982 hdev->scanning_paused = true;
5983
5984 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
5985
5986 return 0;
5987}
5988
5989/* This function resumes discovery */
5990static int hci_resume_discovery_sync(struct hci_dev *hdev)
5991{
5992 int err;
5993
5994 /* If discovery not paused there nothing to do */
5995 if (!hdev->discovery_paused)
5996 return 0;
5997
5998 hdev->discovery_paused = false;
5999
6000 hci_discovery_set_state(hdev, DISCOVERY_STARTING);
6001
6002 err = hci_start_discovery_sync(hdev);
6003
6004 hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
6005 DISCOVERY_FINDING);
6006
6007 return err;
6008}
6009
6010static void hci_resume_monitor_sync(struct hci_dev *hdev)
6011{
6012 switch (hci_get_adv_monitor_offload_ext(hdev)) {
6013 case HCI_ADV_MONITOR_EXT_MSFT:
6014 msft_resume_sync(hdev);
6015 break;
6016 default:
6017 return;
6018 }
6019}
6020
6021/* This function resume scan and reset paused flag */
6022static int hci_resume_scan_sync(struct hci_dev *hdev)
6023{
6024 if (!hdev->scanning_paused)
6025 return 0;
6026
6027 hdev->scanning_paused = false;
6028
6029 hci_update_scan_sync(hdev);
6030
6031 /* Reset passive scanning to normal */
6032 hci_update_passive_scan_sync(hdev);
6033
6034 return 0;
6035}
6036
6037/* This function performs the HCI suspend procedures in the follow order:
6038 *
6039 * Restore event mask
6040 * Clear event filter
6041 * Update passive scanning (normal duty cycle)
6042 * Resume Directed Advertising/Advertising
6043 * Resume discovery (active scanning/inquiry)
6044 */
6045int hci_resume_sync(struct hci_dev *hdev)
6046{
6047 /* If not marked as suspended there nothing to do */
6048 if (!hdev->suspended)
6049 return 0;
6050
6051 hdev->suspended = false;
6052
6053 /* Restore event mask */
6054 hci_set_event_mask_sync(hdev);
6055
6056 /* Clear any event filters and restore scan state */
6057 hci_clear_event_filter_sync(hdev);
6058
6059 /* Resume scanning */
6060 hci_resume_scan_sync(hdev);
6061
6062 /* Resume monitor filters */
6063 hci_resume_monitor_sync(hdev);
6064
6065 /* Resume other advertisements */
6066 hci_resume_advertising_sync(hdev);
6067
6068 /* Resume discovery */
6069 hci_resume_discovery_sync(hdev);
6070
6071 return 0;
6072}
6073
6074static bool conn_use_rpa(struct hci_conn *conn)
6075{
6076 struct hci_dev *hdev = conn->hdev;
6077
6078 return hci_dev_test_flag(hdev, HCI_PRIVACY);
6079}
6080
6081static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
6082 struct hci_conn *conn)
6083{
6084 struct hci_cp_le_set_ext_adv_params cp;
6085 int err;
6086 bdaddr_t random_addr;
6087 u8 own_addr_type;
6088
6089 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6090 &own_addr_type);
6091 if (err)
6092 return err;
6093
6094 /* Set require_privacy to false so that the remote device has a
6095 * chance of identifying us.
6096 */
6097 err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
6098 &own_addr_type, &random_addr);
6099 if (err)
6100 return err;
6101
6102 memset(&cp, 0, sizeof(cp));
6103
6104 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
6105 cp.channel_map = hdev->le_adv_channel_map;
6106 cp.tx_power = HCI_TX_POWER_INVALID;
6107 cp.primary_phy = HCI_ADV_PHY_1M;
6108 cp.secondary_phy = HCI_ADV_PHY_1M;
6109 cp.handle = 0x00; /* Use instance 0 for directed adv */
6110 cp.own_addr_type = own_addr_type;
6111 cp.peer_addr_type = conn->dst_type;
6112 bacpy(&cp.peer_addr, &conn->dst);
6113
6114 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
6115 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
6116 * does not supports advertising data when the advertising set already
6117 * contains some, the controller shall return erroc code 'Invalid
6118 * HCI Command Parameters(0x12).
6119 * So it is required to remove adv set for handle 0x00. since we use
6120 * instance 0 for directed adv.
6121 */
6122 err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
6123 if (err)
6124 return err;
6125
6126 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
6127 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6128 if (err)
6129 return err;
6130
6131 /* Check if random address need to be updated */
6132 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
6133 bacmp(&random_addr, BDADDR_ANY) &&
6134 bacmp(&random_addr, &hdev->random_addr)) {
6135 err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
6136 &random_addr);
6137 if (err)
6138 return err;
6139 }
6140
6141 return hci_enable_ext_advertising_sync(hdev, 0x00);
6142}
6143
6144static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
6145 struct hci_conn *conn)
6146{
6147 struct hci_cp_le_set_adv_param cp;
6148 u8 status;
6149 u8 own_addr_type;
6150 u8 enable;
6151
6152 if (ext_adv_capable(hdev))
6153 return hci_le_ext_directed_advertising_sync(hdev, conn);
6154
6155 /* Clear the HCI_LE_ADV bit temporarily so that the
6156 * hci_update_random_address knows that it's safe to go ahead
6157 * and write a new random address. The flag will be set back on
6158 * as soon as the SET_ADV_ENABLE HCI command completes.
6159 */
6160 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6161
6162 /* Set require_privacy to false so that the remote device has a
6163 * chance of identifying us.
6164 */
6165 status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6166 &own_addr_type);
6167 if (status)
6168 return status;
6169
6170 memset(&cp, 0, sizeof(cp));
6171
6172 /* Some controllers might reject command if intervals are not
6173 * within range for undirected advertising.
6174 * BCM20702A0 is known to be affected by this.
6175 */
6176 cp.min_interval = cpu_to_le16(0x0020);
6177 cp.max_interval = cpu_to_le16(0x0020);
6178
6179 cp.type = LE_ADV_DIRECT_IND;
6180 cp.own_address_type = own_addr_type;
6181 cp.direct_addr_type = conn->dst_type;
6182 bacpy(&cp.direct_addr, &conn->dst);
6183 cp.channel_map = hdev->le_adv_channel_map;
6184
6185 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
6186 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6187 if (status)
6188 return status;
6189
6190 enable = 0x01;
6191
6192 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
6193 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
6194}
6195
6196static void set_ext_conn_params(struct hci_conn *conn,
6197 struct hci_cp_le_ext_conn_param *p)
6198{
6199 struct hci_dev *hdev = conn->hdev;
6200
6201 memset(p, 0, sizeof(*p));
6202
6203 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6204 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6205 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6206 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6207 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
6208 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6209 p->min_ce_len = cpu_to_le16(0x0000);
6210 p->max_ce_len = cpu_to_le16(0x0000);
6211}
6212
6213static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
6214 struct hci_conn *conn, u8 own_addr_type)
6215{
6216 struct hci_cp_le_ext_create_conn *cp;
6217 struct hci_cp_le_ext_conn_param *p;
6218 u8 data[sizeof(*cp) + sizeof(*p) * 3];
6219 u32 plen;
6220
6221 cp = (void *)data;
6222 p = (void *)cp->data;
6223
6224 memset(cp, 0, sizeof(*cp));
6225
6226 bacpy(&cp->peer_addr, &conn->dst);
6227 cp->peer_addr_type = conn->dst_type;
6228 cp->own_addr_type = own_addr_type;
6229
6230 plen = sizeof(*cp);
6231
6232 if (scan_1m(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_1M ||
6233 conn->le_adv_sec_phy == HCI_ADV_PHY_1M)) {
6234 cp->phys |= LE_SCAN_PHY_1M;
6235 set_ext_conn_params(conn, p);
6236
6237 p++;
6238 plen += sizeof(*p);
6239 }
6240
6241 if (scan_2m(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_2M ||
6242 conn->le_adv_sec_phy == HCI_ADV_PHY_2M)) {
6243 cp->phys |= LE_SCAN_PHY_2M;
6244 set_ext_conn_params(conn, p);
6245
6246 p++;
6247 plen += sizeof(*p);
6248 }
6249
6250 if (scan_coded(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_CODED ||
6251 conn->le_adv_sec_phy == HCI_ADV_PHY_CODED)) {
6252 cp->phys |= LE_SCAN_PHY_CODED;
6253 set_ext_conn_params(conn, p);
6254
6255 plen += sizeof(*p);
6256 }
6257
6258 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
6259 plen, data,
6260 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
6261 conn->conn_timeout, NULL);
6262}
6263
6264static int hci_le_create_conn_sync(struct hci_dev *hdev, void *data)
6265{
6266 struct hci_cp_le_create_conn cp;
6267 struct hci_conn_params *params;
6268 u8 own_addr_type;
6269 int err;
6270 struct hci_conn *conn = data;
6271
6272 if (!hci_conn_valid(hdev, conn))
6273 return -ECANCELED;
6274
6275 bt_dev_dbg(hdev, "conn %p", conn);
6276
6277 clear_bit(HCI_CONN_SCANNING, &conn->flags);
6278 conn->state = BT_CONNECT;
6279
6280 /* If requested to connect as peripheral use directed advertising */
6281 if (conn->role == HCI_ROLE_SLAVE) {
6282 /* If we're active scanning and simultaneous roles is not
6283 * enabled simply reject the attempt.
6284 */
6285 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
6286 hdev->le_scan_type == LE_SCAN_ACTIVE &&
6287 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
6288 hci_conn_del(conn);
6289 return -EBUSY;
6290 }
6291
6292 /* Pause advertising while doing directed advertising. */
6293 hci_pause_advertising_sync(hdev);
6294
6295 err = hci_le_directed_advertising_sync(hdev, conn);
6296 goto done;
6297 }
6298
6299 /* Disable advertising if simultaneous roles is not in use. */
6300 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
6301 hci_pause_advertising_sync(hdev);
6302
6303 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
6304 if (params) {
6305 conn->le_conn_min_interval = params->conn_min_interval;
6306 conn->le_conn_max_interval = params->conn_max_interval;
6307 conn->le_conn_latency = params->conn_latency;
6308 conn->le_supv_timeout = params->supervision_timeout;
6309 } else {
6310 conn->le_conn_min_interval = hdev->le_conn_min_interval;
6311 conn->le_conn_max_interval = hdev->le_conn_max_interval;
6312 conn->le_conn_latency = hdev->le_conn_latency;
6313 conn->le_supv_timeout = hdev->le_supv_timeout;
6314 }
6315
6316 /* If controller is scanning, we stop it since some controllers are
6317 * not able to scan and connect at the same time. Also set the
6318 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
6319 * handler for scan disabling knows to set the correct discovery
6320 * state.
6321 */
6322 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
6323 hci_scan_disable_sync(hdev);
6324 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
6325 }
6326
6327 /* Update random address, but set require_privacy to false so
6328 * that we never connect with an non-resolvable address.
6329 */
6330 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6331 &own_addr_type);
6332 if (err)
6333 goto done;
6334
6335 if (use_ext_conn(hdev)) {
6336 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
6337 goto done;
6338 }
6339
6340 memset(&cp, 0, sizeof(cp));
6341
6342 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6343 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6344
6345 bacpy(&cp.peer_addr, &conn->dst);
6346 cp.peer_addr_type = conn->dst_type;
6347 cp.own_address_type = own_addr_type;
6348 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6349 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6350 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
6351 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6352 cp.min_ce_len = cpu_to_le16(0x0000);
6353 cp.max_ce_len = cpu_to_le16(0x0000);
6354
6355 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
6356 *
6357 * If this event is unmasked and the HCI_LE_Connection_Complete event
6358 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
6359 * sent when a new connection has been created.
6360 */
6361 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
6362 sizeof(cp), &cp,
6363 use_enhanced_conn_complete(hdev) ?
6364 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
6365 HCI_EV_LE_CONN_COMPLETE,
6366 conn->conn_timeout, NULL);
6367
6368done:
6369 if (err == -ETIMEDOUT)
6370 hci_le_connect_cancel_sync(hdev, conn, 0x00);
6371
6372 /* Re-enable advertising after the connection attempt is finished. */
6373 hci_resume_advertising_sync(hdev);
6374 return err;
6375}
6376
6377int hci_le_create_cis_sync(struct hci_dev *hdev)
6378{
6379 DEFINE_FLEX(struct hci_cp_le_create_cis, cmd, cis, num_cis, 0x1f);
6380 size_t aux_num_cis = 0;
6381 struct hci_conn *conn;
6382 u8 cig = BT_ISO_QOS_CIG_UNSET;
6383
6384 /* The spec allows only one pending LE Create CIS command at a time. If
6385 * the command is pending now, don't do anything. We check for pending
6386 * connections after each CIS Established event.
6387 *
6388 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6389 * page 2566:
6390 *
6391 * If the Host issues this command before all the
6392 * HCI_LE_CIS_Established events from the previous use of the
6393 * command have been generated, the Controller shall return the
6394 * error code Command Disallowed (0x0C).
6395 *
6396 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6397 * page 2567:
6398 *
6399 * When the Controller receives the HCI_LE_Create_CIS command, the
6400 * Controller sends the HCI_Command_Status event to the Host. An
6401 * HCI_LE_CIS_Established event will be generated for each CIS when it
6402 * is established or if it is disconnected or considered lost before
6403 * being established; until all the events are generated, the command
6404 * remains pending.
6405 */
6406
6407 hci_dev_lock(hdev);
6408
6409 rcu_read_lock();
6410
6411 /* Wait until previous Create CIS has completed */
6412 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6413 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
6414 goto done;
6415 }
6416
6417 /* Find CIG with all CIS ready */
6418 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6419 struct hci_conn *link;
6420
6421 if (hci_conn_check_create_cis(conn))
6422 continue;
6423
6424 cig = conn->iso_qos.ucast.cig;
6425
6426 list_for_each_entry_rcu(link, &hdev->conn_hash.list, list) {
6427 if (hci_conn_check_create_cis(link) > 0 &&
6428 link->iso_qos.ucast.cig == cig &&
6429 link->state != BT_CONNECTED) {
6430 cig = BT_ISO_QOS_CIG_UNSET;
6431 break;
6432 }
6433 }
6434
6435 if (cig != BT_ISO_QOS_CIG_UNSET)
6436 break;
6437 }
6438
6439 if (cig == BT_ISO_QOS_CIG_UNSET)
6440 goto done;
6441
6442 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6443 struct hci_cis *cis = &cmd->cis[aux_num_cis];
6444
6445 if (hci_conn_check_create_cis(conn) ||
6446 conn->iso_qos.ucast.cig != cig)
6447 continue;
6448
6449 set_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6450 cis->acl_handle = cpu_to_le16(conn->parent->handle);
6451 cis->cis_handle = cpu_to_le16(conn->handle);
6452 aux_num_cis++;
6453
6454 if (aux_num_cis >= 0x1f)
6455 break;
6456 }
6457 cmd->num_cis = aux_num_cis;
6458
6459done:
6460 rcu_read_unlock();
6461
6462 hci_dev_unlock(hdev);
6463
6464 if (!aux_num_cis)
6465 return 0;
6466
6467 /* Wait for HCI_LE_CIS_Established */
6468 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CIS,
6469 struct_size(cmd, cis, cmd->num_cis),
6470 cmd, HCI_EVT_LE_CIS_ESTABLISHED,
6471 conn->conn_timeout, NULL);
6472}
6473
6474int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle)
6475{
6476 struct hci_cp_le_remove_cig cp;
6477
6478 memset(&cp, 0, sizeof(cp));
6479 cp.cig_id = handle;
6480
6481 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp),
6482 &cp, HCI_CMD_TIMEOUT);
6483}
6484
6485int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle)
6486{
6487 struct hci_cp_le_big_term_sync cp;
6488
6489 memset(&cp, 0, sizeof(cp));
6490 cp.handle = handle;
6491
6492 return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC,
6493 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6494}
6495
6496int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
6497{
6498 struct hci_cp_le_pa_term_sync cp;
6499
6500 memset(&cp, 0, sizeof(cp));
6501 cp.handle = cpu_to_le16(handle);
6502
6503 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
6504 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6505}
6506
6507int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
6508 bool use_rpa, struct adv_info *adv_instance,
6509 u8 *own_addr_type, bdaddr_t *rand_addr)
6510{
6511 int err;
6512
6513 bacpy(rand_addr, BDADDR_ANY);
6514
6515 /* If privacy is enabled use a resolvable private address. If
6516 * current RPA has expired then generate a new one.
6517 */
6518 if (use_rpa) {
6519 /* If Controller supports LL Privacy use own address type is
6520 * 0x03
6521 */
6522 if (use_ll_privacy(hdev))
6523 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
6524 else
6525 *own_addr_type = ADDR_LE_DEV_RANDOM;
6526
6527 if (adv_instance) {
6528 if (adv_rpa_valid(adv_instance))
6529 return 0;
6530 } else {
6531 if (rpa_valid(hdev))
6532 return 0;
6533 }
6534
6535 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
6536 if (err < 0) {
6537 bt_dev_err(hdev, "failed to generate new RPA");
6538 return err;
6539 }
6540
6541 bacpy(rand_addr, &hdev->rpa);
6542
6543 return 0;
6544 }
6545
6546 /* In case of required privacy without resolvable private address,
6547 * use an non-resolvable private address. This is useful for
6548 * non-connectable advertising.
6549 */
6550 if (require_privacy) {
6551 bdaddr_t nrpa;
6552
6553 while (true) {
6554 /* The non-resolvable private address is generated
6555 * from random six bytes with the two most significant
6556 * bits cleared.
6557 */
6558 get_random_bytes(&nrpa, 6);
6559 nrpa.b[5] &= 0x3f;
6560
6561 /* The non-resolvable private address shall not be
6562 * equal to the public address.
6563 */
6564 if (bacmp(&hdev->bdaddr, &nrpa))
6565 break;
6566 }
6567
6568 *own_addr_type = ADDR_LE_DEV_RANDOM;
6569 bacpy(rand_addr, &nrpa);
6570
6571 return 0;
6572 }
6573
6574 /* No privacy so use a public address. */
6575 *own_addr_type = ADDR_LE_DEV_PUBLIC;
6576
6577 return 0;
6578}
6579
6580static int _update_adv_data_sync(struct hci_dev *hdev, void *data)
6581{
6582 u8 instance = PTR_UINT(data);
6583
6584 return hci_update_adv_data_sync(hdev, instance);
6585}
6586
6587int hci_update_adv_data(struct hci_dev *hdev, u8 instance)
6588{
6589 return hci_cmd_sync_queue(hdev, _update_adv_data_sync,
6590 UINT_PTR(instance), NULL);
6591}
6592
6593static int hci_acl_create_conn_sync(struct hci_dev *hdev, void *data)
6594{
6595 struct hci_conn *conn = data;
6596 struct inquiry_entry *ie;
6597 struct hci_cp_create_conn cp;
6598 int err;
6599
6600 if (!hci_conn_valid(hdev, conn))
6601 return -ECANCELED;
6602
6603 /* Many controllers disallow HCI Create Connection while it is doing
6604 * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
6605 * Connection. This may cause the MGMT discovering state to become false
6606 * without user space's request but it is okay since the MGMT Discovery
6607 * APIs do not promise that discovery should be done forever. Instead,
6608 * the user space monitors the status of MGMT discovering and it may
6609 * request for discovery again when this flag becomes false.
6610 */
6611 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
6612 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL, 0,
6613 NULL, HCI_CMD_TIMEOUT);
6614 if (err)
6615 bt_dev_warn(hdev, "Failed to cancel inquiry %d", err);
6616 }
6617
6618 conn->state = BT_CONNECT;
6619 conn->out = true;
6620 conn->role = HCI_ROLE_MASTER;
6621
6622 conn->attempt++;
6623
6624 conn->link_policy = hdev->link_policy;
6625
6626 memset(&cp, 0, sizeof(cp));
6627 bacpy(&cp.bdaddr, &conn->dst);
6628 cp.pscan_rep_mode = 0x02;
6629
6630 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
6631 if (ie) {
6632 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
6633 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
6634 cp.pscan_mode = ie->data.pscan_mode;
6635 cp.clock_offset = ie->data.clock_offset |
6636 cpu_to_le16(0x8000);
6637 }
6638
6639 memcpy(conn->dev_class, ie->data.dev_class, 3);
6640 }
6641
6642 cp.pkt_type = cpu_to_le16(conn->pkt_type);
6643 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
6644 cp.role_switch = 0x01;
6645 else
6646 cp.role_switch = 0x00;
6647
6648 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN,
6649 sizeof(cp), &cp,
6650 HCI_EV_CONN_COMPLETE,
6651 conn->conn_timeout, NULL);
6652}
6653
6654int hci_connect_acl_sync(struct hci_dev *hdev, struct hci_conn *conn)
6655{
6656 return hci_cmd_sync_queue_once(hdev, hci_acl_create_conn_sync, conn,
6657 NULL);
6658}
6659
6660static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
6661{
6662 struct hci_conn *conn = data;
6663
6664 bt_dev_dbg(hdev, "err %d", err);
6665
6666 if (err == -ECANCELED)
6667 return;
6668
6669 hci_dev_lock(hdev);
6670
6671 if (!hci_conn_valid(hdev, conn))
6672 goto done;
6673
6674 if (!err) {
6675 hci_connect_le_scan_cleanup(conn, 0x00);
6676 goto done;
6677 }
6678
6679 /* Check if connection is still pending */
6680 if (conn != hci_lookup_le_connect(hdev))
6681 goto done;
6682
6683 /* Flush to make sure we send create conn cancel command if needed */
6684 flush_delayed_work(&conn->le_conn_timeout);
6685 hci_conn_failed(conn, bt_status(err));
6686
6687done:
6688 hci_dev_unlock(hdev);
6689}
6690
6691int hci_connect_le_sync(struct hci_dev *hdev, struct hci_conn *conn)
6692{
6693 return hci_cmd_sync_queue_once(hdev, hci_le_create_conn_sync, conn,
6694 create_le_conn_complete);
6695}
6696
6697int hci_cancel_connect_sync(struct hci_dev *hdev, struct hci_conn *conn)
6698{
6699 if (conn->state != BT_OPEN)
6700 return -EINVAL;
6701
6702 switch (conn->type) {
6703 case ACL_LINK:
6704 return !hci_cmd_sync_dequeue_once(hdev,
6705 hci_acl_create_conn_sync,
6706 conn, NULL);
6707 case LE_LINK:
6708 return !hci_cmd_sync_dequeue_once(hdev, hci_le_create_conn_sync,
6709 conn, create_le_conn_complete);
6710 }
6711
6712 return -ENOENT;
6713}