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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2021 Intel Corporation
6 * Copyright 2023 NXP
7 */
8
9#include <linux/property.h>
10
11#include <net/bluetooth/bluetooth.h>
12#include <net/bluetooth/hci_core.h>
13#include <net/bluetooth/mgmt.h>
14
15#include "hci_codec.h"
16#include "hci_debugfs.h"
17#include "smp.h"
18#include "eir.h"
19#include "msft.h"
20#include "aosp.h"
21#include "leds.h"
22
23static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
24 struct sk_buff *skb)
25{
26 bt_dev_dbg(hdev, "result 0x%2.2x", result);
27
28 if (hdev->req_status != HCI_REQ_PEND)
29 return;
30
31 hdev->req_result = result;
32 hdev->req_status = HCI_REQ_DONE;
33
34 /* Free the request command so it is not used as response */
35 kfree_skb(hdev->req_skb);
36 hdev->req_skb = NULL;
37
38 if (skb) {
39 struct sock *sk = hci_skb_sk(skb);
40
41 /* Drop sk reference if set */
42 if (sk)
43 sock_put(sk);
44
45 hdev->req_rsp = skb_get(skb);
46 }
47
48 wake_up_interruptible(&hdev->req_wait_q);
49}
50
51struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode, u32 plen,
52 const void *param, struct sock *sk)
53{
54 int len = HCI_COMMAND_HDR_SIZE + plen;
55 struct hci_command_hdr *hdr;
56 struct sk_buff *skb;
57
58 skb = bt_skb_alloc(len, GFP_ATOMIC);
59 if (!skb)
60 return NULL;
61
62 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
63 hdr->opcode = cpu_to_le16(opcode);
64 hdr->plen = plen;
65
66 if (plen)
67 skb_put_data(skb, param, plen);
68
69 bt_dev_dbg(hdev, "skb len %d", skb->len);
70
71 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
72 hci_skb_opcode(skb) = opcode;
73
74 /* Grab a reference if command needs to be associated with a sock (e.g.
75 * likely mgmt socket that initiated the command).
76 */
77 if (sk) {
78 hci_skb_sk(skb) = sk;
79 sock_hold(sk);
80 }
81
82 return skb;
83}
84
85static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
86 const void *param, u8 event, struct sock *sk)
87{
88 struct hci_dev *hdev = req->hdev;
89 struct sk_buff *skb;
90
91 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
92
93 /* If an error occurred during request building, there is no point in
94 * queueing the HCI command. We can simply return.
95 */
96 if (req->err)
97 return;
98
99 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
100 if (!skb) {
101 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
102 opcode);
103 req->err = -ENOMEM;
104 return;
105 }
106
107 if (skb_queue_empty(&req->cmd_q))
108 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
109
110 hci_skb_event(skb) = event;
111
112 skb_queue_tail(&req->cmd_q, skb);
113}
114
115static int hci_req_sync_run(struct hci_request *req)
116{
117 struct hci_dev *hdev = req->hdev;
118 struct sk_buff *skb;
119 unsigned long flags;
120
121 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
122
123 /* If an error occurred during request building, remove all HCI
124 * commands queued on the HCI request queue.
125 */
126 if (req->err) {
127 skb_queue_purge(&req->cmd_q);
128 return req->err;
129 }
130
131 /* Do not allow empty requests */
132 if (skb_queue_empty(&req->cmd_q))
133 return -ENODATA;
134
135 skb = skb_peek_tail(&req->cmd_q);
136 bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
137 bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
138
139 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
140 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
141 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
142
143 queue_work(hdev->workqueue, &hdev->cmd_work);
144
145 return 0;
146}
147
148static void hci_request_init(struct hci_request *req, struct hci_dev *hdev)
149{
150 skb_queue_head_init(&req->cmd_q);
151 req->hdev = hdev;
152 req->err = 0;
153}
154
155/* This function requires the caller holds hdev->req_lock. */
156struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
157 const void *param, u8 event, u32 timeout,
158 struct sock *sk)
159{
160 struct hci_request req;
161 struct sk_buff *skb;
162 int err = 0;
163
164 bt_dev_dbg(hdev, "Opcode 0x%4.4x", opcode);
165
166 hci_request_init(&req, hdev);
167
168 hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
169
170 hdev->req_status = HCI_REQ_PEND;
171
172 err = hci_req_sync_run(&req);
173 if (err < 0)
174 return ERR_PTR(err);
175
176 err = wait_event_interruptible_timeout(hdev->req_wait_q,
177 hdev->req_status != HCI_REQ_PEND,
178 timeout);
179
180 if (err == -ERESTARTSYS)
181 return ERR_PTR(-EINTR);
182
183 switch (hdev->req_status) {
184 case HCI_REQ_DONE:
185 err = -bt_to_errno(hdev->req_result);
186 break;
187
188 case HCI_REQ_CANCELED:
189 err = -hdev->req_result;
190 break;
191
192 default:
193 err = -ETIMEDOUT;
194 break;
195 }
196
197 hdev->req_status = 0;
198 hdev->req_result = 0;
199 skb = hdev->req_rsp;
200 hdev->req_rsp = NULL;
201
202 bt_dev_dbg(hdev, "end: err %d", err);
203
204 if (err < 0) {
205 kfree_skb(skb);
206 return ERR_PTR(err);
207 }
208
209 /* If command return a status event skb will be set to NULL as there are
210 * no parameters.
211 */
212 if (!skb)
213 return ERR_PTR(-ENODATA);
214
215 return skb;
216}
217EXPORT_SYMBOL(__hci_cmd_sync_sk);
218
219/* This function requires the caller holds hdev->req_lock. */
220struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
221 const void *param, u32 timeout)
222{
223 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
224}
225EXPORT_SYMBOL(__hci_cmd_sync);
226
227/* Send HCI command and wait for command complete event */
228struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
229 const void *param, u32 timeout)
230{
231 struct sk_buff *skb;
232
233 if (!test_bit(HCI_UP, &hdev->flags))
234 return ERR_PTR(-ENETDOWN);
235
236 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
237
238 hci_req_sync_lock(hdev);
239 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
240 hci_req_sync_unlock(hdev);
241
242 return skb;
243}
244EXPORT_SYMBOL(hci_cmd_sync);
245
246/* This function requires the caller holds hdev->req_lock. */
247struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
248 const void *param, u8 event, u32 timeout)
249{
250 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
251 NULL);
252}
253EXPORT_SYMBOL(__hci_cmd_sync_ev);
254
255/* This function requires the caller holds hdev->req_lock. */
256int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
257 const void *param, u8 event, u32 timeout,
258 struct sock *sk)
259{
260 struct sk_buff *skb;
261 u8 status;
262
263 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
264
265 /* If command return a status event, skb will be set to -ENODATA */
266 if (skb == ERR_PTR(-ENODATA))
267 return 0;
268
269 if (IS_ERR(skb)) {
270 if (!event)
271 bt_dev_err(hdev, "Opcode 0x%4.4x failed: %ld", opcode,
272 PTR_ERR(skb));
273 return PTR_ERR(skb);
274 }
275
276 status = skb->data[0];
277
278 kfree_skb(skb);
279
280 return status;
281}
282EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
283
284int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
285 const void *param, u32 timeout)
286{
287 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
288 NULL);
289}
290EXPORT_SYMBOL(__hci_cmd_sync_status);
291
292int hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
293 const void *param, u32 timeout)
294{
295 int err;
296
297 hci_req_sync_lock(hdev);
298 err = __hci_cmd_sync_status(hdev, opcode, plen, param, timeout);
299 hci_req_sync_unlock(hdev);
300
301 return err;
302}
303EXPORT_SYMBOL(hci_cmd_sync_status);
304
305static void hci_cmd_sync_work(struct work_struct *work)
306{
307 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
308
309 bt_dev_dbg(hdev, "");
310
311 /* Dequeue all entries and run them */
312 while (1) {
313 struct hci_cmd_sync_work_entry *entry;
314
315 mutex_lock(&hdev->cmd_sync_work_lock);
316 entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
317 struct hci_cmd_sync_work_entry,
318 list);
319 if (entry)
320 list_del(&entry->list);
321 mutex_unlock(&hdev->cmd_sync_work_lock);
322
323 if (!entry)
324 break;
325
326 bt_dev_dbg(hdev, "entry %p", entry);
327
328 if (entry->func) {
329 int err;
330
331 hci_req_sync_lock(hdev);
332 err = entry->func(hdev, entry->data);
333 if (entry->destroy)
334 entry->destroy(hdev, entry->data, err);
335 hci_req_sync_unlock(hdev);
336 }
337
338 kfree(entry);
339 }
340}
341
342static void hci_cmd_sync_cancel_work(struct work_struct *work)
343{
344 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
345
346 cancel_delayed_work_sync(&hdev->cmd_timer);
347 cancel_delayed_work_sync(&hdev->ncmd_timer);
348 atomic_set(&hdev->cmd_cnt, 1);
349
350 wake_up_interruptible(&hdev->req_wait_q);
351}
352
353static int hci_scan_disable_sync(struct hci_dev *hdev);
354static int scan_disable_sync(struct hci_dev *hdev, void *data)
355{
356 return hci_scan_disable_sync(hdev);
357}
358
359static int interleaved_inquiry_sync(struct hci_dev *hdev, void *data)
360{
361 return hci_inquiry_sync(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN, 0);
362}
363
364static void le_scan_disable(struct work_struct *work)
365{
366 struct hci_dev *hdev = container_of(work, struct hci_dev,
367 le_scan_disable.work);
368 int status;
369
370 bt_dev_dbg(hdev, "");
371 hci_dev_lock(hdev);
372
373 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
374 goto _return;
375
376 status = hci_cmd_sync_queue(hdev, scan_disable_sync, NULL, NULL);
377 if (status) {
378 bt_dev_err(hdev, "failed to disable LE scan: %d", status);
379 goto _return;
380 }
381
382 /* If we were running LE only scan, change discovery state. If
383 * we were running both LE and BR/EDR inquiry simultaneously,
384 * and BR/EDR inquiry is already finished, stop discovery,
385 * otherwise BR/EDR inquiry will stop discovery when finished.
386 * If we will resolve remote device name, do not change
387 * discovery state.
388 */
389
390 if (hdev->discovery.type == DISCOV_TYPE_LE)
391 goto discov_stopped;
392
393 if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED)
394 goto _return;
395
396 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) {
397 if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
398 hdev->discovery.state != DISCOVERY_RESOLVING)
399 goto discov_stopped;
400
401 goto _return;
402 }
403
404 status = hci_cmd_sync_queue(hdev, interleaved_inquiry_sync, NULL, NULL);
405 if (status) {
406 bt_dev_err(hdev, "inquiry failed: status %d", status);
407 goto discov_stopped;
408 }
409
410 goto _return;
411
412discov_stopped:
413 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
414
415_return:
416 hci_dev_unlock(hdev);
417}
418
419static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
420 u8 filter_dup);
421
422static int reenable_adv_sync(struct hci_dev *hdev, void *data)
423{
424 bt_dev_dbg(hdev, "");
425
426 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
427 list_empty(&hdev->adv_instances))
428 return 0;
429
430 if (hdev->cur_adv_instance) {
431 return hci_schedule_adv_instance_sync(hdev,
432 hdev->cur_adv_instance,
433 true);
434 } else {
435 if (ext_adv_capable(hdev)) {
436 hci_start_ext_adv_sync(hdev, 0x00);
437 } else {
438 hci_update_adv_data_sync(hdev, 0x00);
439 hci_update_scan_rsp_data_sync(hdev, 0x00);
440 hci_enable_advertising_sync(hdev);
441 }
442 }
443
444 return 0;
445}
446
447static void reenable_adv(struct work_struct *work)
448{
449 struct hci_dev *hdev = container_of(work, struct hci_dev,
450 reenable_adv_work);
451 int status;
452
453 bt_dev_dbg(hdev, "");
454
455 hci_dev_lock(hdev);
456
457 status = hci_cmd_sync_queue(hdev, reenable_adv_sync, NULL, NULL);
458 if (status)
459 bt_dev_err(hdev, "failed to reenable ADV: %d", status);
460
461 hci_dev_unlock(hdev);
462}
463
464static void cancel_adv_timeout(struct hci_dev *hdev)
465{
466 if (hdev->adv_instance_timeout) {
467 hdev->adv_instance_timeout = 0;
468 cancel_delayed_work(&hdev->adv_instance_expire);
469 }
470}
471
472/* For a single instance:
473 * - force == true: The instance will be removed even when its remaining
474 * lifetime is not zero.
475 * - force == false: the instance will be deactivated but kept stored unless
476 * the remaining lifetime is zero.
477 *
478 * For instance == 0x00:
479 * - force == true: All instances will be removed regardless of their timeout
480 * setting.
481 * - force == false: Only instances that have a timeout will be removed.
482 */
483int hci_clear_adv_instance_sync(struct hci_dev *hdev, struct sock *sk,
484 u8 instance, bool force)
485{
486 struct adv_info *adv_instance, *n, *next_instance = NULL;
487 int err;
488 u8 rem_inst;
489
490 /* Cancel any timeout concerning the removed instance(s). */
491 if (!instance || hdev->cur_adv_instance == instance)
492 cancel_adv_timeout(hdev);
493
494 /* Get the next instance to advertise BEFORE we remove
495 * the current one. This can be the same instance again
496 * if there is only one instance.
497 */
498 if (instance && hdev->cur_adv_instance == instance)
499 next_instance = hci_get_next_instance(hdev, instance);
500
501 if (instance == 0x00) {
502 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances,
503 list) {
504 if (!(force || adv_instance->timeout))
505 continue;
506
507 rem_inst = adv_instance->instance;
508 err = hci_remove_adv_instance(hdev, rem_inst);
509 if (!err)
510 mgmt_advertising_removed(sk, hdev, rem_inst);
511 }
512 } else {
513 adv_instance = hci_find_adv_instance(hdev, instance);
514
515 if (force || (adv_instance && adv_instance->timeout &&
516 !adv_instance->remaining_time)) {
517 /* Don't advertise a removed instance. */
518 if (next_instance &&
519 next_instance->instance == instance)
520 next_instance = NULL;
521
522 err = hci_remove_adv_instance(hdev, instance);
523 if (!err)
524 mgmt_advertising_removed(sk, hdev, instance);
525 }
526 }
527
528 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
529 return 0;
530
531 if (next_instance && !ext_adv_capable(hdev))
532 return hci_schedule_adv_instance_sync(hdev,
533 next_instance->instance,
534 false);
535
536 return 0;
537}
538
539static int adv_timeout_expire_sync(struct hci_dev *hdev, void *data)
540{
541 u8 instance = *(u8 *)data;
542
543 kfree(data);
544
545 hci_clear_adv_instance_sync(hdev, NULL, instance, false);
546
547 if (list_empty(&hdev->adv_instances))
548 return hci_disable_advertising_sync(hdev);
549
550 return 0;
551}
552
553static void adv_timeout_expire(struct work_struct *work)
554{
555 u8 *inst_ptr;
556 struct hci_dev *hdev = container_of(work, struct hci_dev,
557 adv_instance_expire.work);
558
559 bt_dev_dbg(hdev, "");
560
561 hci_dev_lock(hdev);
562
563 hdev->adv_instance_timeout = 0;
564
565 if (hdev->cur_adv_instance == 0x00)
566 goto unlock;
567
568 inst_ptr = kmalloc(1, GFP_KERNEL);
569 if (!inst_ptr)
570 goto unlock;
571
572 *inst_ptr = hdev->cur_adv_instance;
573 hci_cmd_sync_queue(hdev, adv_timeout_expire_sync, inst_ptr, NULL);
574
575unlock:
576 hci_dev_unlock(hdev);
577}
578
579static bool is_interleave_scanning(struct hci_dev *hdev)
580{
581 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
582}
583
584static int hci_passive_scan_sync(struct hci_dev *hdev);
585
586static void interleave_scan_work(struct work_struct *work)
587{
588 struct hci_dev *hdev = container_of(work, struct hci_dev,
589 interleave_scan.work);
590 unsigned long timeout;
591
592 if (hdev->interleave_scan_state == INTERLEAVE_SCAN_ALLOWLIST) {
593 timeout = msecs_to_jiffies(hdev->advmon_allowlist_duration);
594 } else if (hdev->interleave_scan_state == INTERLEAVE_SCAN_NO_FILTER) {
595 timeout = msecs_to_jiffies(hdev->advmon_no_filter_duration);
596 } else {
597 bt_dev_err(hdev, "unexpected error");
598 return;
599 }
600
601 hci_passive_scan_sync(hdev);
602
603 hci_dev_lock(hdev);
604
605 switch (hdev->interleave_scan_state) {
606 case INTERLEAVE_SCAN_ALLOWLIST:
607 bt_dev_dbg(hdev, "next state: allowlist");
608 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
609 break;
610 case INTERLEAVE_SCAN_NO_FILTER:
611 bt_dev_dbg(hdev, "next state: no filter");
612 hdev->interleave_scan_state = INTERLEAVE_SCAN_ALLOWLIST;
613 break;
614 case INTERLEAVE_SCAN_NONE:
615 bt_dev_err(hdev, "unexpected error");
616 }
617
618 hci_dev_unlock(hdev);
619
620 /* Don't continue interleaving if it was canceled */
621 if (is_interleave_scanning(hdev))
622 queue_delayed_work(hdev->req_workqueue,
623 &hdev->interleave_scan, timeout);
624}
625
626void hci_cmd_sync_init(struct hci_dev *hdev)
627{
628 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
629 INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
630 mutex_init(&hdev->cmd_sync_work_lock);
631 mutex_init(&hdev->unregister_lock);
632
633 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
634 INIT_WORK(&hdev->reenable_adv_work, reenable_adv);
635 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable);
636 INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
637 INIT_DELAYED_WORK(&hdev->interleave_scan, interleave_scan_work);
638}
639
640static void _hci_cmd_sync_cancel_entry(struct hci_dev *hdev,
641 struct hci_cmd_sync_work_entry *entry,
642 int err)
643{
644 if (entry->destroy)
645 entry->destroy(hdev, entry->data, err);
646
647 list_del(&entry->list);
648 kfree(entry);
649}
650
651void hci_cmd_sync_clear(struct hci_dev *hdev)
652{
653 struct hci_cmd_sync_work_entry *entry, *tmp;
654
655 cancel_work_sync(&hdev->cmd_sync_work);
656 cancel_work_sync(&hdev->reenable_adv_work);
657
658 mutex_lock(&hdev->cmd_sync_work_lock);
659 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list)
660 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
661 mutex_unlock(&hdev->cmd_sync_work_lock);
662}
663
664void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
665{
666 bt_dev_dbg(hdev, "err 0x%2.2x", err);
667
668 if (hdev->req_status == HCI_REQ_PEND) {
669 hdev->req_result = err;
670 hdev->req_status = HCI_REQ_CANCELED;
671
672 queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
673 }
674}
675EXPORT_SYMBOL(hci_cmd_sync_cancel);
676
677/* Cancel ongoing command request synchronously:
678 *
679 * - Set result and mark status to HCI_REQ_CANCELED
680 * - Wakeup command sync thread
681 */
682void hci_cmd_sync_cancel_sync(struct hci_dev *hdev, int err)
683{
684 bt_dev_dbg(hdev, "err 0x%2.2x", err);
685
686 if (hdev->req_status == HCI_REQ_PEND) {
687 /* req_result is __u32 so error must be positive to be properly
688 * propagated.
689 */
690 hdev->req_result = err < 0 ? -err : err;
691 hdev->req_status = HCI_REQ_CANCELED;
692
693 wake_up_interruptible(&hdev->req_wait_q);
694 }
695}
696EXPORT_SYMBOL(hci_cmd_sync_cancel_sync);
697
698/* Submit HCI command to be run in as cmd_sync_work:
699 *
700 * - hdev must _not_ be unregistered
701 */
702int hci_cmd_sync_submit(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
703 void *data, hci_cmd_sync_work_destroy_t destroy)
704{
705 struct hci_cmd_sync_work_entry *entry;
706 int err = 0;
707
708 mutex_lock(&hdev->unregister_lock);
709 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
710 err = -ENODEV;
711 goto unlock;
712 }
713
714 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
715 if (!entry) {
716 err = -ENOMEM;
717 goto unlock;
718 }
719 entry->func = func;
720 entry->data = data;
721 entry->destroy = destroy;
722
723 mutex_lock(&hdev->cmd_sync_work_lock);
724 list_add_tail(&entry->list, &hdev->cmd_sync_work_list);
725 mutex_unlock(&hdev->cmd_sync_work_lock);
726
727 queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
728
729unlock:
730 mutex_unlock(&hdev->unregister_lock);
731 return err;
732}
733EXPORT_SYMBOL(hci_cmd_sync_submit);
734
735/* Queue HCI command:
736 *
737 * - hdev must be running
738 */
739int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
740 void *data, hci_cmd_sync_work_destroy_t destroy)
741{
742 /* Only queue command if hdev is running which means it had been opened
743 * and is either on init phase or is already up.
744 */
745 if (!test_bit(HCI_RUNNING, &hdev->flags))
746 return -ENETDOWN;
747
748 return hci_cmd_sync_submit(hdev, func, data, destroy);
749}
750EXPORT_SYMBOL(hci_cmd_sync_queue);
751
752static struct hci_cmd_sync_work_entry *
753_hci_cmd_sync_lookup_entry(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
754 void *data, hci_cmd_sync_work_destroy_t destroy)
755{
756 struct hci_cmd_sync_work_entry *entry, *tmp;
757
758 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
759 if (func && entry->func != func)
760 continue;
761
762 if (data && entry->data != data)
763 continue;
764
765 if (destroy && entry->destroy != destroy)
766 continue;
767
768 return entry;
769 }
770
771 return NULL;
772}
773
774/* Queue HCI command entry once:
775 *
776 * - Lookup if an entry already exist and only if it doesn't creates a new entry
777 * and queue it.
778 */
779int hci_cmd_sync_queue_once(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
780 void *data, hci_cmd_sync_work_destroy_t destroy)
781{
782 if (hci_cmd_sync_lookup_entry(hdev, func, data, destroy))
783 return 0;
784
785 return hci_cmd_sync_queue(hdev, func, data, destroy);
786}
787EXPORT_SYMBOL(hci_cmd_sync_queue_once);
788
789/* Run HCI command:
790 *
791 * - hdev must be running
792 * - if on cmd_sync_work then run immediately otherwise queue
793 */
794int hci_cmd_sync_run(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
795 void *data, hci_cmd_sync_work_destroy_t destroy)
796{
797 /* Only queue command if hdev is running which means it had been opened
798 * and is either on init phase or is already up.
799 */
800 if (!test_bit(HCI_RUNNING, &hdev->flags))
801 return -ENETDOWN;
802
803 /* If on cmd_sync_work then run immediately otherwise queue */
804 if (current_work() == &hdev->cmd_sync_work)
805 return func(hdev, data);
806
807 return hci_cmd_sync_submit(hdev, func, data, destroy);
808}
809EXPORT_SYMBOL(hci_cmd_sync_run);
810
811/* Run HCI command entry once:
812 *
813 * - Lookup if an entry already exist and only if it doesn't creates a new entry
814 * and run it.
815 * - if on cmd_sync_work then run immediately otherwise queue
816 */
817int hci_cmd_sync_run_once(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
818 void *data, hci_cmd_sync_work_destroy_t destroy)
819{
820 if (hci_cmd_sync_lookup_entry(hdev, func, data, destroy))
821 return 0;
822
823 return hci_cmd_sync_run(hdev, func, data, destroy);
824}
825EXPORT_SYMBOL(hci_cmd_sync_run_once);
826
827/* Lookup HCI command entry:
828 *
829 * - Return first entry that matches by function callback or data or
830 * destroy callback.
831 */
832struct hci_cmd_sync_work_entry *
833hci_cmd_sync_lookup_entry(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
834 void *data, hci_cmd_sync_work_destroy_t destroy)
835{
836 struct hci_cmd_sync_work_entry *entry;
837
838 mutex_lock(&hdev->cmd_sync_work_lock);
839 entry = _hci_cmd_sync_lookup_entry(hdev, func, data, destroy);
840 mutex_unlock(&hdev->cmd_sync_work_lock);
841
842 return entry;
843}
844EXPORT_SYMBOL(hci_cmd_sync_lookup_entry);
845
846/* Cancel HCI command entry */
847void hci_cmd_sync_cancel_entry(struct hci_dev *hdev,
848 struct hci_cmd_sync_work_entry *entry)
849{
850 mutex_lock(&hdev->cmd_sync_work_lock);
851 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
852 mutex_unlock(&hdev->cmd_sync_work_lock);
853}
854EXPORT_SYMBOL(hci_cmd_sync_cancel_entry);
855
856/* Dequeue one HCI command entry:
857 *
858 * - Lookup and cancel first entry that matches.
859 */
860bool hci_cmd_sync_dequeue_once(struct hci_dev *hdev,
861 hci_cmd_sync_work_func_t func,
862 void *data, hci_cmd_sync_work_destroy_t destroy)
863{
864 struct hci_cmd_sync_work_entry *entry;
865
866 entry = hci_cmd_sync_lookup_entry(hdev, func, data, destroy);
867 if (!entry)
868 return false;
869
870 hci_cmd_sync_cancel_entry(hdev, entry);
871
872 return true;
873}
874EXPORT_SYMBOL(hci_cmd_sync_dequeue_once);
875
876/* Dequeue HCI command entry:
877 *
878 * - Lookup and cancel any entry that matches by function callback or data or
879 * destroy callback.
880 */
881bool hci_cmd_sync_dequeue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
882 void *data, hci_cmd_sync_work_destroy_t destroy)
883{
884 struct hci_cmd_sync_work_entry *entry;
885 bool ret = false;
886
887 mutex_lock(&hdev->cmd_sync_work_lock);
888 while ((entry = _hci_cmd_sync_lookup_entry(hdev, func, data,
889 destroy))) {
890 _hci_cmd_sync_cancel_entry(hdev, entry, -ECANCELED);
891 ret = true;
892 }
893 mutex_unlock(&hdev->cmd_sync_work_lock);
894
895 return ret;
896}
897EXPORT_SYMBOL(hci_cmd_sync_dequeue);
898
899int hci_update_eir_sync(struct hci_dev *hdev)
900{
901 struct hci_cp_write_eir cp;
902
903 bt_dev_dbg(hdev, "");
904
905 if (!hdev_is_powered(hdev))
906 return 0;
907
908 if (!lmp_ext_inq_capable(hdev))
909 return 0;
910
911 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
912 return 0;
913
914 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
915 return 0;
916
917 memset(&cp, 0, sizeof(cp));
918
919 eir_create(hdev, cp.data);
920
921 if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
922 return 0;
923
924 memcpy(hdev->eir, cp.data, sizeof(cp.data));
925
926 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
927 HCI_CMD_TIMEOUT);
928}
929
930static u8 get_service_classes(struct hci_dev *hdev)
931{
932 struct bt_uuid *uuid;
933 u8 val = 0;
934
935 list_for_each_entry(uuid, &hdev->uuids, list)
936 val |= uuid->svc_hint;
937
938 return val;
939}
940
941int hci_update_class_sync(struct hci_dev *hdev)
942{
943 u8 cod[3];
944
945 bt_dev_dbg(hdev, "");
946
947 if (!hdev_is_powered(hdev))
948 return 0;
949
950 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
951 return 0;
952
953 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
954 return 0;
955
956 cod[0] = hdev->minor_class;
957 cod[1] = hdev->major_class;
958 cod[2] = get_service_classes(hdev);
959
960 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
961 cod[1] |= 0x20;
962
963 if (memcmp(cod, hdev->dev_class, 3) == 0)
964 return 0;
965
966 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
967 sizeof(cod), cod, HCI_CMD_TIMEOUT);
968}
969
970static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
971{
972 /* If there is no connection we are OK to advertise. */
973 if (hci_conn_num(hdev, LE_LINK) == 0)
974 return true;
975
976 /* Check le_states if there is any connection in peripheral role. */
977 if (hdev->conn_hash.le_num_peripheral > 0) {
978 /* Peripheral connection state and non connectable mode
979 * bit 20.
980 */
981 if (!connectable && !(hdev->le_states[2] & 0x10))
982 return false;
983
984 /* Peripheral connection state and connectable mode bit 38
985 * and scannable bit 21.
986 */
987 if (connectable && (!(hdev->le_states[4] & 0x40) ||
988 !(hdev->le_states[2] & 0x20)))
989 return false;
990 }
991
992 /* Check le_states if there is any connection in central role. */
993 if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
994 /* Central connection state and non connectable mode bit 18. */
995 if (!connectable && !(hdev->le_states[2] & 0x02))
996 return false;
997
998 /* Central connection state and connectable mode bit 35 and
999 * scannable 19.
1000 */
1001 if (connectable && (!(hdev->le_states[4] & 0x08) ||
1002 !(hdev->le_states[2] & 0x08)))
1003 return false;
1004 }
1005
1006 return true;
1007}
1008
1009static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
1010{
1011 /* If privacy is not enabled don't use RPA */
1012 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
1013 return false;
1014
1015 /* If basic privacy mode is enabled use RPA */
1016 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
1017 return true;
1018
1019 /* If limited privacy mode is enabled don't use RPA if we're
1020 * both discoverable and bondable.
1021 */
1022 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
1023 hci_dev_test_flag(hdev, HCI_BONDABLE))
1024 return false;
1025
1026 /* We're neither bondable nor discoverable in the limited
1027 * privacy mode, therefore use RPA.
1028 */
1029 return true;
1030}
1031
1032static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
1033{
1034 /* If a random_addr has been set we're advertising or initiating an LE
1035 * connection we can't go ahead and change the random address at this
1036 * time. This is because the eventual initiator address used for the
1037 * subsequently created connection will be undefined (some
1038 * controllers use the new address and others the one we had
1039 * when the operation started).
1040 *
1041 * In this kind of scenario skip the update and let the random
1042 * address be updated at the next cycle.
1043 */
1044 if (bacmp(&hdev->random_addr, BDADDR_ANY) &&
1045 (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
1046 hci_lookup_le_connect(hdev))) {
1047 bt_dev_dbg(hdev, "Deferring random address update");
1048 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1049 return 0;
1050 }
1051
1052 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
1053 6, rpa, HCI_CMD_TIMEOUT);
1054}
1055
1056int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
1057 bool rpa, u8 *own_addr_type)
1058{
1059 int err;
1060
1061 /* If privacy is enabled use a resolvable private address. If
1062 * current RPA has expired or there is something else than
1063 * the current RPA in use, then generate a new one.
1064 */
1065 if (rpa) {
1066 /* If Controller supports LL Privacy use own address type is
1067 * 0x03
1068 */
1069 if (use_ll_privacy(hdev))
1070 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
1071 else
1072 *own_addr_type = ADDR_LE_DEV_RANDOM;
1073
1074 /* Check if RPA is valid */
1075 if (rpa_valid(hdev))
1076 return 0;
1077
1078 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
1079 if (err < 0) {
1080 bt_dev_err(hdev, "failed to generate new RPA");
1081 return err;
1082 }
1083
1084 err = hci_set_random_addr_sync(hdev, &hdev->rpa);
1085 if (err)
1086 return err;
1087
1088 return 0;
1089 }
1090
1091 /* In case of required privacy without resolvable private address,
1092 * use an non-resolvable private address. This is useful for active
1093 * scanning and non-connectable advertising.
1094 */
1095 if (require_privacy) {
1096 bdaddr_t nrpa;
1097
1098 while (true) {
1099 /* The non-resolvable private address is generated
1100 * from random six bytes with the two most significant
1101 * bits cleared.
1102 */
1103 get_random_bytes(&nrpa, 6);
1104 nrpa.b[5] &= 0x3f;
1105
1106 /* The non-resolvable private address shall not be
1107 * equal to the public address.
1108 */
1109 if (bacmp(&hdev->bdaddr, &nrpa))
1110 break;
1111 }
1112
1113 *own_addr_type = ADDR_LE_DEV_RANDOM;
1114
1115 return hci_set_random_addr_sync(hdev, &nrpa);
1116 }
1117
1118 /* If forcing static address is in use or there is no public
1119 * address use the static address as random address (but skip
1120 * the HCI command if the current random address is already the
1121 * static one.
1122 *
1123 * In case BR/EDR has been disabled on a dual-mode controller
1124 * and a static address has been configured, then use that
1125 * address instead of the public BR/EDR address.
1126 */
1127 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
1128 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
1129 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
1130 bacmp(&hdev->static_addr, BDADDR_ANY))) {
1131 *own_addr_type = ADDR_LE_DEV_RANDOM;
1132 if (bacmp(&hdev->static_addr, &hdev->random_addr))
1133 return hci_set_random_addr_sync(hdev,
1134 &hdev->static_addr);
1135 return 0;
1136 }
1137
1138 /* Neither privacy nor static address is being used so use a
1139 * public address.
1140 */
1141 *own_addr_type = ADDR_LE_DEV_PUBLIC;
1142
1143 return 0;
1144}
1145
1146static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1147{
1148 struct hci_cp_le_set_ext_adv_enable *cp;
1149 struct hci_cp_ext_adv_set *set;
1150 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1151 u8 size;
1152 struct adv_info *adv = NULL;
1153
1154 /* If request specifies an instance that doesn't exist, fail */
1155 if (instance > 0) {
1156 adv = hci_find_adv_instance(hdev, instance);
1157 if (!adv)
1158 return -EINVAL;
1159
1160 /* If not enabled there is nothing to do */
1161 if (!adv->enabled)
1162 return 0;
1163 }
1164
1165 memset(data, 0, sizeof(data));
1166
1167 cp = (void *)data;
1168 set = (void *)cp->data;
1169
1170 /* Instance 0x00 indicates all advertising instances will be disabled */
1171 cp->num_of_sets = !!instance;
1172 cp->enable = 0x00;
1173
1174 set->handle = adv ? adv->handle : instance;
1175
1176 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
1177
1178 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1179 size, data, HCI_CMD_TIMEOUT);
1180}
1181
1182static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
1183 bdaddr_t *random_addr)
1184{
1185 struct hci_cp_le_set_adv_set_rand_addr cp;
1186 int err;
1187
1188 if (!instance) {
1189 /* Instance 0x00 doesn't have an adv_info, instead it uses
1190 * hdev->random_addr to track its address so whenever it needs
1191 * to be updated this also set the random address since
1192 * hdev->random_addr is shared with scan state machine.
1193 */
1194 err = hci_set_random_addr_sync(hdev, random_addr);
1195 if (err)
1196 return err;
1197 }
1198
1199 memset(&cp, 0, sizeof(cp));
1200
1201 cp.handle = instance;
1202 bacpy(&cp.bdaddr, random_addr);
1203
1204 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
1205 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1206}
1207
1208int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1209{
1210 struct hci_cp_le_set_ext_adv_params cp;
1211 bool connectable;
1212 u32 flags;
1213 bdaddr_t random_addr;
1214 u8 own_addr_type;
1215 int err;
1216 struct adv_info *adv;
1217 bool secondary_adv;
1218
1219 if (instance > 0) {
1220 adv = hci_find_adv_instance(hdev, instance);
1221 if (!adv)
1222 return -EINVAL;
1223 } else {
1224 adv = NULL;
1225 }
1226
1227 /* Updating parameters of an active instance will return a
1228 * Command Disallowed error, so we must first disable the
1229 * instance if it is active.
1230 */
1231 if (adv && !adv->pending) {
1232 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1233 if (err)
1234 return err;
1235 }
1236
1237 flags = hci_adv_instance_flags(hdev, instance);
1238
1239 /* If the "connectable" instance flag was not set, then choose between
1240 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1241 */
1242 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1243 mgmt_get_connectable(hdev);
1244
1245 if (!is_advertising_allowed(hdev, connectable))
1246 return -EPERM;
1247
1248 /* Set require_privacy to true only when non-connectable
1249 * advertising is used. In that case it is fine to use a
1250 * non-resolvable private address.
1251 */
1252 err = hci_get_random_address(hdev, !connectable,
1253 adv_use_rpa(hdev, flags), adv,
1254 &own_addr_type, &random_addr);
1255 if (err < 0)
1256 return err;
1257
1258 memset(&cp, 0, sizeof(cp));
1259
1260 if (adv) {
1261 hci_cpu_to_le24(adv->min_interval, cp.min_interval);
1262 hci_cpu_to_le24(adv->max_interval, cp.max_interval);
1263 cp.tx_power = adv->tx_power;
1264 } else {
1265 hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
1266 hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
1267 cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
1268 }
1269
1270 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
1271
1272 if (connectable) {
1273 if (secondary_adv)
1274 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
1275 else
1276 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
1277 } else if (hci_adv_instance_is_scannable(hdev, instance) ||
1278 (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
1279 if (secondary_adv)
1280 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
1281 else
1282 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
1283 } else {
1284 if (secondary_adv)
1285 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
1286 else
1287 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
1288 }
1289
1290 /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
1291 * contains the peer’s Identity Address and the Peer_Address_Type
1292 * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
1293 * These parameters are used to locate the corresponding local IRK in
1294 * the resolving list; this IRK is used to generate their own address
1295 * used in the advertisement.
1296 */
1297 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
1298 hci_copy_identity_address(hdev, &cp.peer_addr,
1299 &cp.peer_addr_type);
1300
1301 cp.own_addr_type = own_addr_type;
1302 cp.channel_map = hdev->le_adv_channel_map;
1303 cp.handle = adv ? adv->handle : instance;
1304
1305 if (flags & MGMT_ADV_FLAG_SEC_2M) {
1306 cp.primary_phy = HCI_ADV_PHY_1M;
1307 cp.secondary_phy = HCI_ADV_PHY_2M;
1308 } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
1309 cp.primary_phy = HCI_ADV_PHY_CODED;
1310 cp.secondary_phy = HCI_ADV_PHY_CODED;
1311 } else {
1312 /* In all other cases use 1M */
1313 cp.primary_phy = HCI_ADV_PHY_1M;
1314 cp.secondary_phy = HCI_ADV_PHY_1M;
1315 }
1316
1317 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
1318 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1319 if (err)
1320 return err;
1321
1322 if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
1323 own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
1324 bacmp(&random_addr, BDADDR_ANY)) {
1325 /* Check if random address need to be updated */
1326 if (adv) {
1327 if (!bacmp(&random_addr, &adv->random_addr))
1328 return 0;
1329 } else {
1330 if (!bacmp(&random_addr, &hdev->random_addr))
1331 return 0;
1332 }
1333
1334 return hci_set_adv_set_random_addr_sync(hdev, instance,
1335 &random_addr);
1336 }
1337
1338 return 0;
1339}
1340
1341static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1342{
1343 DEFINE_FLEX(struct hci_cp_le_set_ext_scan_rsp_data, pdu, data, length,
1344 HCI_MAX_EXT_AD_LENGTH);
1345 u8 len;
1346 struct adv_info *adv = NULL;
1347 int err;
1348
1349 if (instance) {
1350 adv = hci_find_adv_instance(hdev, instance);
1351 if (!adv || !adv->scan_rsp_changed)
1352 return 0;
1353 }
1354
1355 len = eir_create_scan_rsp(hdev, instance, pdu->data);
1356
1357 pdu->handle = adv ? adv->handle : instance;
1358 pdu->length = len;
1359 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1360 pdu->frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1361
1362 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
1363 struct_size(pdu, data, len), pdu,
1364 HCI_CMD_TIMEOUT);
1365 if (err)
1366 return err;
1367
1368 if (adv) {
1369 adv->scan_rsp_changed = false;
1370 } else {
1371 memcpy(hdev->scan_rsp_data, pdu->data, len);
1372 hdev->scan_rsp_data_len = len;
1373 }
1374
1375 return 0;
1376}
1377
1378static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1379{
1380 struct hci_cp_le_set_scan_rsp_data cp;
1381 u8 len;
1382
1383 memset(&cp, 0, sizeof(cp));
1384
1385 len = eir_create_scan_rsp(hdev, instance, cp.data);
1386
1387 if (hdev->scan_rsp_data_len == len &&
1388 !memcmp(cp.data, hdev->scan_rsp_data, len))
1389 return 0;
1390
1391 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
1392 hdev->scan_rsp_data_len = len;
1393
1394 cp.length = len;
1395
1396 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
1397 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1398}
1399
1400int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1401{
1402 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1403 return 0;
1404
1405 if (ext_adv_capable(hdev))
1406 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
1407
1408 return __hci_set_scan_rsp_data_sync(hdev, instance);
1409}
1410
1411int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
1412{
1413 struct hci_cp_le_set_ext_adv_enable *cp;
1414 struct hci_cp_ext_adv_set *set;
1415 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1416 struct adv_info *adv;
1417
1418 if (instance > 0) {
1419 adv = hci_find_adv_instance(hdev, instance);
1420 if (!adv)
1421 return -EINVAL;
1422 /* If already enabled there is nothing to do */
1423 if (adv->enabled)
1424 return 0;
1425 } else {
1426 adv = NULL;
1427 }
1428
1429 cp = (void *)data;
1430 set = (void *)cp->data;
1431
1432 memset(cp, 0, sizeof(*cp));
1433
1434 cp->enable = 0x01;
1435 cp->num_of_sets = 0x01;
1436
1437 memset(set, 0, sizeof(*set));
1438
1439 set->handle = adv ? adv->handle : instance;
1440
1441 /* Set duration per instance since controller is responsible for
1442 * scheduling it.
1443 */
1444 if (adv && adv->timeout) {
1445 u16 duration = adv->timeout * MSEC_PER_SEC;
1446
1447 /* Time = N * 10 ms */
1448 set->duration = cpu_to_le16(duration / 10);
1449 }
1450
1451 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1452 sizeof(*cp) +
1453 sizeof(*set) * cp->num_of_sets,
1454 data, HCI_CMD_TIMEOUT);
1455}
1456
1457int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
1458{
1459 int err;
1460
1461 err = hci_setup_ext_adv_instance_sync(hdev, instance);
1462 if (err)
1463 return err;
1464
1465 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
1466 if (err)
1467 return err;
1468
1469 return hci_enable_ext_advertising_sync(hdev, instance);
1470}
1471
1472int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1473{
1474 struct hci_cp_le_set_per_adv_enable cp;
1475 struct adv_info *adv = NULL;
1476
1477 /* If periodic advertising already disabled there is nothing to do. */
1478 adv = hci_find_adv_instance(hdev, instance);
1479 if (!adv || !adv->periodic || !adv->enabled)
1480 return 0;
1481
1482 memset(&cp, 0, sizeof(cp));
1483
1484 cp.enable = 0x00;
1485 cp.handle = instance;
1486
1487 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1488 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1489}
1490
1491static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance,
1492 u16 min_interval, u16 max_interval)
1493{
1494 struct hci_cp_le_set_per_adv_params cp;
1495
1496 memset(&cp, 0, sizeof(cp));
1497
1498 if (!min_interval)
1499 min_interval = DISCOV_LE_PER_ADV_INT_MIN;
1500
1501 if (!max_interval)
1502 max_interval = DISCOV_LE_PER_ADV_INT_MAX;
1503
1504 cp.handle = instance;
1505 cp.min_interval = cpu_to_le16(min_interval);
1506 cp.max_interval = cpu_to_le16(max_interval);
1507 cp.periodic_properties = 0x0000;
1508
1509 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS,
1510 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1511}
1512
1513static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance)
1514{
1515 DEFINE_FLEX(struct hci_cp_le_set_per_adv_data, pdu, data, length,
1516 HCI_MAX_PER_AD_LENGTH);
1517 u8 len;
1518 struct adv_info *adv = NULL;
1519
1520 if (instance) {
1521 adv = hci_find_adv_instance(hdev, instance);
1522 if (!adv || !adv->periodic)
1523 return 0;
1524 }
1525
1526 len = eir_create_per_adv_data(hdev, instance, pdu->data);
1527
1528 pdu->length = len;
1529 pdu->handle = adv ? adv->handle : instance;
1530 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1531
1532 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA,
1533 struct_size(pdu, data, len), pdu,
1534 HCI_CMD_TIMEOUT);
1535}
1536
1537static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1538{
1539 struct hci_cp_le_set_per_adv_enable cp;
1540 struct adv_info *adv = NULL;
1541
1542 /* If periodic advertising already enabled there is nothing to do. */
1543 adv = hci_find_adv_instance(hdev, instance);
1544 if (adv && adv->periodic && adv->enabled)
1545 return 0;
1546
1547 memset(&cp, 0, sizeof(cp));
1548
1549 cp.enable = 0x01;
1550 cp.handle = instance;
1551
1552 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1553 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1554}
1555
1556/* Checks if periodic advertising data contains a Basic Announcement and if it
1557 * does generates a Broadcast ID and add Broadcast Announcement.
1558 */
1559static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv)
1560{
1561 u8 bid[3];
1562 u8 ad[4 + 3];
1563
1564 /* Skip if NULL adv as instance 0x00 is used for general purpose
1565 * advertising so it cannot used for the likes of Broadcast Announcement
1566 * as it can be overwritten at any point.
1567 */
1568 if (!adv)
1569 return 0;
1570
1571 /* Check if PA data doesn't contains a Basic Audio Announcement then
1572 * there is nothing to do.
1573 */
1574 if (!eir_get_service_data(adv->per_adv_data, adv->per_adv_data_len,
1575 0x1851, NULL))
1576 return 0;
1577
1578 /* Check if advertising data already has a Broadcast Announcement since
1579 * the process may want to control the Broadcast ID directly and in that
1580 * case the kernel shall no interfere.
1581 */
1582 if (eir_get_service_data(adv->adv_data, adv->adv_data_len, 0x1852,
1583 NULL))
1584 return 0;
1585
1586 /* Generate Broadcast ID */
1587 get_random_bytes(bid, sizeof(bid));
1588 eir_append_service_data(ad, 0, 0x1852, bid, sizeof(bid));
1589 hci_set_adv_instance_data(hdev, adv->instance, sizeof(ad), ad, 0, NULL);
1590
1591 return hci_update_adv_data_sync(hdev, adv->instance);
1592}
1593
1594int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len,
1595 u8 *data, u32 flags, u16 min_interval,
1596 u16 max_interval, u16 sync_interval)
1597{
1598 struct adv_info *adv = NULL;
1599 int err;
1600 bool added = false;
1601
1602 hci_disable_per_advertising_sync(hdev, instance);
1603
1604 if (instance) {
1605 adv = hci_find_adv_instance(hdev, instance);
1606 /* Create an instance if that could not be found */
1607 if (!adv) {
1608 adv = hci_add_per_instance(hdev, instance, flags,
1609 data_len, data,
1610 sync_interval,
1611 sync_interval);
1612 if (IS_ERR(adv))
1613 return PTR_ERR(adv);
1614 adv->pending = false;
1615 added = true;
1616 }
1617 }
1618
1619 /* Start advertising */
1620 err = hci_start_ext_adv_sync(hdev, instance);
1621 if (err < 0)
1622 goto fail;
1623
1624 err = hci_adv_bcast_annoucement(hdev, adv);
1625 if (err < 0)
1626 goto fail;
1627
1628 err = hci_set_per_adv_params_sync(hdev, instance, min_interval,
1629 max_interval);
1630 if (err < 0)
1631 goto fail;
1632
1633 err = hci_set_per_adv_data_sync(hdev, instance);
1634 if (err < 0)
1635 goto fail;
1636
1637 err = hci_enable_per_advertising_sync(hdev, instance);
1638 if (err < 0)
1639 goto fail;
1640
1641 return 0;
1642
1643fail:
1644 if (added)
1645 hci_remove_adv_instance(hdev, instance);
1646
1647 return err;
1648}
1649
1650static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
1651{
1652 int err;
1653
1654 if (ext_adv_capable(hdev))
1655 return hci_start_ext_adv_sync(hdev, instance);
1656
1657 err = hci_update_adv_data_sync(hdev, instance);
1658 if (err)
1659 return err;
1660
1661 err = hci_update_scan_rsp_data_sync(hdev, instance);
1662 if (err)
1663 return err;
1664
1665 return hci_enable_advertising_sync(hdev);
1666}
1667
1668int hci_enable_advertising_sync(struct hci_dev *hdev)
1669{
1670 struct adv_info *adv_instance;
1671 struct hci_cp_le_set_adv_param cp;
1672 u8 own_addr_type, enable = 0x01;
1673 bool connectable;
1674 u16 adv_min_interval, adv_max_interval;
1675 u32 flags;
1676 u8 status;
1677
1678 if (ext_adv_capable(hdev))
1679 return hci_enable_ext_advertising_sync(hdev,
1680 hdev->cur_adv_instance);
1681
1682 flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
1683 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
1684
1685 /* If the "connectable" instance flag was not set, then choose between
1686 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1687 */
1688 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1689 mgmt_get_connectable(hdev);
1690
1691 if (!is_advertising_allowed(hdev, connectable))
1692 return -EINVAL;
1693
1694 status = hci_disable_advertising_sync(hdev);
1695 if (status)
1696 return status;
1697
1698 /* Clear the HCI_LE_ADV bit temporarily so that the
1699 * hci_update_random_address knows that it's safe to go ahead
1700 * and write a new random address. The flag will be set back on
1701 * as soon as the SET_ADV_ENABLE HCI command completes.
1702 */
1703 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1704
1705 /* Set require_privacy to true only when non-connectable
1706 * advertising is used. In that case it is fine to use a
1707 * non-resolvable private address.
1708 */
1709 status = hci_update_random_address_sync(hdev, !connectable,
1710 adv_use_rpa(hdev, flags),
1711 &own_addr_type);
1712 if (status)
1713 return status;
1714
1715 memset(&cp, 0, sizeof(cp));
1716
1717 if (adv_instance) {
1718 adv_min_interval = adv_instance->min_interval;
1719 adv_max_interval = adv_instance->max_interval;
1720 } else {
1721 adv_min_interval = hdev->le_adv_min_interval;
1722 adv_max_interval = hdev->le_adv_max_interval;
1723 }
1724
1725 if (connectable) {
1726 cp.type = LE_ADV_IND;
1727 } else {
1728 if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
1729 cp.type = LE_ADV_SCAN_IND;
1730 else
1731 cp.type = LE_ADV_NONCONN_IND;
1732
1733 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1734 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
1735 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
1736 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
1737 }
1738 }
1739
1740 cp.min_interval = cpu_to_le16(adv_min_interval);
1741 cp.max_interval = cpu_to_le16(adv_max_interval);
1742 cp.own_address_type = own_addr_type;
1743 cp.channel_map = hdev->le_adv_channel_map;
1744
1745 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
1746 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1747 if (status)
1748 return status;
1749
1750 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1751 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1752}
1753
1754static int enable_advertising_sync(struct hci_dev *hdev, void *data)
1755{
1756 return hci_enable_advertising_sync(hdev);
1757}
1758
1759int hci_enable_advertising(struct hci_dev *hdev)
1760{
1761 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
1762 list_empty(&hdev->adv_instances))
1763 return 0;
1764
1765 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
1766}
1767
1768int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1769 struct sock *sk)
1770{
1771 int err;
1772
1773 if (!ext_adv_capable(hdev))
1774 return 0;
1775
1776 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1777 if (err)
1778 return err;
1779
1780 /* If request specifies an instance that doesn't exist, fail */
1781 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
1782 return -EINVAL;
1783
1784 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
1785 sizeof(instance), &instance, 0,
1786 HCI_CMD_TIMEOUT, sk);
1787}
1788
1789static int remove_ext_adv_sync(struct hci_dev *hdev, void *data)
1790{
1791 struct adv_info *adv = data;
1792 u8 instance = 0;
1793
1794 if (adv)
1795 instance = adv->instance;
1796
1797 return hci_remove_ext_adv_instance_sync(hdev, instance, NULL);
1798}
1799
1800int hci_remove_ext_adv_instance(struct hci_dev *hdev, u8 instance)
1801{
1802 struct adv_info *adv = NULL;
1803
1804 if (instance) {
1805 adv = hci_find_adv_instance(hdev, instance);
1806 if (!adv)
1807 return -EINVAL;
1808 }
1809
1810 return hci_cmd_sync_queue(hdev, remove_ext_adv_sync, adv, NULL);
1811}
1812
1813int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason)
1814{
1815 struct hci_cp_le_term_big cp;
1816
1817 memset(&cp, 0, sizeof(cp));
1818 cp.handle = handle;
1819 cp.reason = reason;
1820
1821 return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG,
1822 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1823}
1824
1825static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1826{
1827 DEFINE_FLEX(struct hci_cp_le_set_ext_adv_data, pdu, data, length,
1828 HCI_MAX_EXT_AD_LENGTH);
1829 u8 len;
1830 struct adv_info *adv = NULL;
1831 int err;
1832
1833 if (instance) {
1834 adv = hci_find_adv_instance(hdev, instance);
1835 if (!adv || !adv->adv_data_changed)
1836 return 0;
1837 }
1838
1839 len = eir_create_adv_data(hdev, instance, pdu->data);
1840
1841 pdu->length = len;
1842 pdu->handle = adv ? adv->handle : instance;
1843 pdu->operation = LE_SET_ADV_DATA_OP_COMPLETE;
1844 pdu->frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1845
1846 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1847 struct_size(pdu, data, len), pdu,
1848 HCI_CMD_TIMEOUT);
1849 if (err)
1850 return err;
1851
1852 /* Update data if the command succeed */
1853 if (adv) {
1854 adv->adv_data_changed = false;
1855 } else {
1856 memcpy(hdev->adv_data, pdu->data, len);
1857 hdev->adv_data_len = len;
1858 }
1859
1860 return 0;
1861}
1862
1863static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1864{
1865 struct hci_cp_le_set_adv_data cp;
1866 u8 len;
1867
1868 memset(&cp, 0, sizeof(cp));
1869
1870 len = eir_create_adv_data(hdev, instance, cp.data);
1871
1872 /* There's nothing to do if the data hasn't changed */
1873 if (hdev->adv_data_len == len &&
1874 memcmp(cp.data, hdev->adv_data, len) == 0)
1875 return 0;
1876
1877 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1878 hdev->adv_data_len = len;
1879
1880 cp.length = len;
1881
1882 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1883 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1884}
1885
1886int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1887{
1888 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1889 return 0;
1890
1891 if (ext_adv_capable(hdev))
1892 return hci_set_ext_adv_data_sync(hdev, instance);
1893
1894 return hci_set_adv_data_sync(hdev, instance);
1895}
1896
1897int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1898 bool force)
1899{
1900 struct adv_info *adv = NULL;
1901 u16 timeout;
1902
1903 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
1904 return -EPERM;
1905
1906 if (hdev->adv_instance_timeout)
1907 return -EBUSY;
1908
1909 adv = hci_find_adv_instance(hdev, instance);
1910 if (!adv)
1911 return -ENOENT;
1912
1913 /* A zero timeout means unlimited advertising. As long as there is
1914 * only one instance, duration should be ignored. We still set a timeout
1915 * in case further instances are being added later on.
1916 *
1917 * If the remaining lifetime of the instance is more than the duration
1918 * then the timeout corresponds to the duration, otherwise it will be
1919 * reduced to the remaining instance lifetime.
1920 */
1921 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
1922 timeout = adv->duration;
1923 else
1924 timeout = adv->remaining_time;
1925
1926 /* The remaining time is being reduced unless the instance is being
1927 * advertised without time limit.
1928 */
1929 if (adv->timeout)
1930 adv->remaining_time = adv->remaining_time - timeout;
1931
1932 /* Only use work for scheduling instances with legacy advertising */
1933 if (!ext_adv_capable(hdev)) {
1934 hdev->adv_instance_timeout = timeout;
1935 queue_delayed_work(hdev->req_workqueue,
1936 &hdev->adv_instance_expire,
1937 msecs_to_jiffies(timeout * 1000));
1938 }
1939
1940 /* If we're just re-scheduling the same instance again then do not
1941 * execute any HCI commands. This happens when a single instance is
1942 * being advertised.
1943 */
1944 if (!force && hdev->cur_adv_instance == instance &&
1945 hci_dev_test_flag(hdev, HCI_LE_ADV))
1946 return 0;
1947
1948 hdev->cur_adv_instance = instance;
1949
1950 return hci_start_adv_sync(hdev, instance);
1951}
1952
1953static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
1954{
1955 int err;
1956
1957 if (!ext_adv_capable(hdev))
1958 return 0;
1959
1960 /* Disable instance 0x00 to disable all instances */
1961 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1962 if (err)
1963 return err;
1964
1965 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
1966 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1967}
1968
1969static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
1970{
1971 struct adv_info *adv, *n;
1972 int err = 0;
1973
1974 if (ext_adv_capable(hdev))
1975 /* Remove all existing sets */
1976 err = hci_clear_adv_sets_sync(hdev, sk);
1977 if (ext_adv_capable(hdev))
1978 return err;
1979
1980 /* This is safe as long as there is no command send while the lock is
1981 * held.
1982 */
1983 hci_dev_lock(hdev);
1984
1985 /* Cleanup non-ext instances */
1986 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1987 u8 instance = adv->instance;
1988 int err;
1989
1990 if (!(force || adv->timeout))
1991 continue;
1992
1993 err = hci_remove_adv_instance(hdev, instance);
1994 if (!err)
1995 mgmt_advertising_removed(sk, hdev, instance);
1996 }
1997
1998 hci_dev_unlock(hdev);
1999
2000 return 0;
2001}
2002
2003static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
2004 struct sock *sk)
2005{
2006 int err = 0;
2007
2008 /* If we use extended advertising, instance has to be removed first. */
2009 if (ext_adv_capable(hdev))
2010 err = hci_remove_ext_adv_instance_sync(hdev, instance, sk);
2011 if (ext_adv_capable(hdev))
2012 return err;
2013
2014 /* This is safe as long as there is no command send while the lock is
2015 * held.
2016 */
2017 hci_dev_lock(hdev);
2018
2019 err = hci_remove_adv_instance(hdev, instance);
2020 if (!err)
2021 mgmt_advertising_removed(sk, hdev, instance);
2022
2023 hci_dev_unlock(hdev);
2024
2025 return err;
2026}
2027
2028/* For a single instance:
2029 * - force == true: The instance will be removed even when its remaining
2030 * lifetime is not zero.
2031 * - force == false: the instance will be deactivated but kept stored unless
2032 * the remaining lifetime is zero.
2033 *
2034 * For instance == 0x00:
2035 * - force == true: All instances will be removed regardless of their timeout
2036 * setting.
2037 * - force == false: Only instances that have a timeout will be removed.
2038 */
2039int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
2040 u8 instance, bool force)
2041{
2042 struct adv_info *next = NULL;
2043 int err;
2044
2045 /* Cancel any timeout concerning the removed instance(s). */
2046 if (!instance || hdev->cur_adv_instance == instance)
2047 cancel_adv_timeout(hdev);
2048
2049 /* Get the next instance to advertise BEFORE we remove
2050 * the current one. This can be the same instance again
2051 * if there is only one instance.
2052 */
2053 if (hdev->cur_adv_instance == instance)
2054 next = hci_get_next_instance(hdev, instance);
2055
2056 if (!instance) {
2057 err = hci_clear_adv_sync(hdev, sk, force);
2058 if (err)
2059 return err;
2060 } else {
2061 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
2062
2063 if (force || (adv && adv->timeout && !adv->remaining_time)) {
2064 /* Don't advertise a removed instance. */
2065 if (next && next->instance == instance)
2066 next = NULL;
2067
2068 err = hci_remove_adv_sync(hdev, instance, sk);
2069 if (err)
2070 return err;
2071 }
2072 }
2073
2074 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
2075 return 0;
2076
2077 if (next && !ext_adv_capable(hdev))
2078 hci_schedule_adv_instance_sync(hdev, next->instance, false);
2079
2080 return 0;
2081}
2082
2083int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
2084{
2085 struct hci_cp_read_rssi cp;
2086
2087 cp.handle = handle;
2088 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
2089 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2090}
2091
2092int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
2093{
2094 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
2095 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
2096}
2097
2098int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
2099{
2100 struct hci_cp_read_tx_power cp;
2101
2102 cp.handle = handle;
2103 cp.type = type;
2104 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
2105 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2106}
2107
2108int hci_disable_advertising_sync(struct hci_dev *hdev)
2109{
2110 u8 enable = 0x00;
2111 int err = 0;
2112
2113 /* If controller is not advertising we are done. */
2114 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
2115 return 0;
2116
2117 if (ext_adv_capable(hdev))
2118 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
2119 if (ext_adv_capable(hdev))
2120 return err;
2121
2122 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
2123 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
2124}
2125
2126static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
2127 u8 filter_dup)
2128{
2129 struct hci_cp_le_set_ext_scan_enable cp;
2130
2131 memset(&cp, 0, sizeof(cp));
2132 cp.enable = val;
2133
2134 if (hci_dev_test_flag(hdev, HCI_MESH))
2135 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2136 else
2137 cp.filter_dup = filter_dup;
2138
2139 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
2140 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2141}
2142
2143static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
2144 u8 filter_dup)
2145{
2146 struct hci_cp_le_set_scan_enable cp;
2147
2148 if (use_ext_scan(hdev))
2149 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
2150
2151 memset(&cp, 0, sizeof(cp));
2152 cp.enable = val;
2153
2154 if (val && hci_dev_test_flag(hdev, HCI_MESH))
2155 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2156 else
2157 cp.filter_dup = filter_dup;
2158
2159 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
2160 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2161}
2162
2163static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
2164{
2165 if (!use_ll_privacy(hdev))
2166 return 0;
2167
2168 /* If controller is not/already resolving we are done. */
2169 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2170 return 0;
2171
2172 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
2173 sizeof(val), &val, HCI_CMD_TIMEOUT);
2174}
2175
2176static int hci_scan_disable_sync(struct hci_dev *hdev)
2177{
2178 int err;
2179
2180 /* If controller is not scanning we are done. */
2181 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
2182 return 0;
2183
2184 if (hdev->scanning_paused) {
2185 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2186 return 0;
2187 }
2188
2189 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
2190 if (err) {
2191 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
2192 return err;
2193 }
2194
2195 return err;
2196}
2197
2198static bool scan_use_rpa(struct hci_dev *hdev)
2199{
2200 return hci_dev_test_flag(hdev, HCI_PRIVACY);
2201}
2202
2203static void hci_start_interleave_scan(struct hci_dev *hdev)
2204{
2205 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
2206 queue_delayed_work(hdev->req_workqueue,
2207 &hdev->interleave_scan, 0);
2208}
2209
2210static void cancel_interleave_scan(struct hci_dev *hdev)
2211{
2212 bt_dev_dbg(hdev, "cancelling interleave scan");
2213
2214 cancel_delayed_work_sync(&hdev->interleave_scan);
2215
2216 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
2217}
2218
2219/* Return true if interleave_scan wasn't started until exiting this function,
2220 * otherwise, return false
2221 */
2222static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
2223{
2224 /* Do interleaved scan only if all of the following are true:
2225 * - There is at least one ADV monitor
2226 * - At least one pending LE connection or one device to be scanned for
2227 * - Monitor offloading is not supported
2228 * If so, we should alternate between allowlist scan and one without
2229 * any filters to save power.
2230 */
2231 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
2232 !(list_empty(&hdev->pend_le_conns) &&
2233 list_empty(&hdev->pend_le_reports)) &&
2234 hci_get_adv_monitor_offload_ext(hdev) ==
2235 HCI_ADV_MONITOR_EXT_NONE;
2236 bool is_interleaving = is_interleave_scanning(hdev);
2237
2238 if (use_interleaving && !is_interleaving) {
2239 hci_start_interleave_scan(hdev);
2240 bt_dev_dbg(hdev, "starting interleave scan");
2241 return true;
2242 }
2243
2244 if (!use_interleaving && is_interleaving)
2245 cancel_interleave_scan(hdev);
2246
2247 return false;
2248}
2249
2250/* Removes connection to resolve list if needed.*/
2251static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
2252 bdaddr_t *bdaddr, u8 bdaddr_type)
2253{
2254 struct hci_cp_le_del_from_resolv_list cp;
2255 struct bdaddr_list_with_irk *entry;
2256
2257 if (!use_ll_privacy(hdev))
2258 return 0;
2259
2260 /* Check if the IRK has been programmed */
2261 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
2262 bdaddr_type);
2263 if (!entry)
2264 return 0;
2265
2266 cp.bdaddr_type = bdaddr_type;
2267 bacpy(&cp.bdaddr, bdaddr);
2268
2269 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
2270 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2271}
2272
2273static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
2274 bdaddr_t *bdaddr, u8 bdaddr_type)
2275{
2276 struct hci_cp_le_del_from_accept_list cp;
2277 int err;
2278
2279 /* Check if device is on accept list before removing it */
2280 if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
2281 return 0;
2282
2283 cp.bdaddr_type = bdaddr_type;
2284 bacpy(&cp.bdaddr, bdaddr);
2285
2286 /* Ignore errors when removing from resolving list as that is likely
2287 * that the device was never added.
2288 */
2289 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2290
2291 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
2292 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2293 if (err) {
2294 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
2295 return err;
2296 }
2297
2298 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
2299 cp.bdaddr_type);
2300
2301 return 0;
2302}
2303
2304struct conn_params {
2305 bdaddr_t addr;
2306 u8 addr_type;
2307 hci_conn_flags_t flags;
2308 u8 privacy_mode;
2309};
2310
2311/* Adds connection to resolve list if needed.
2312 * Setting params to NULL programs local hdev->irk
2313 */
2314static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
2315 struct conn_params *params)
2316{
2317 struct hci_cp_le_add_to_resolv_list cp;
2318 struct smp_irk *irk;
2319 struct bdaddr_list_with_irk *entry;
2320 struct hci_conn_params *p;
2321
2322 if (!use_ll_privacy(hdev))
2323 return 0;
2324
2325 /* Attempt to program local identity address, type and irk if params is
2326 * NULL.
2327 */
2328 if (!params) {
2329 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
2330 return 0;
2331
2332 hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
2333 memcpy(cp.peer_irk, hdev->irk, 16);
2334 goto done;
2335 }
2336
2337 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
2338 if (!irk)
2339 return 0;
2340
2341 /* Check if the IK has _not_ been programmed yet. */
2342 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
2343 ¶ms->addr,
2344 params->addr_type);
2345 if (entry)
2346 return 0;
2347
2348 cp.bdaddr_type = params->addr_type;
2349 bacpy(&cp.bdaddr, ¶ms->addr);
2350 memcpy(cp.peer_irk, irk->val, 16);
2351
2352 /* Default privacy mode is always Network */
2353 params->privacy_mode = HCI_NETWORK_PRIVACY;
2354
2355 rcu_read_lock();
2356 p = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2357 ¶ms->addr, params->addr_type);
2358 if (!p)
2359 p = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2360 ¶ms->addr, params->addr_type);
2361 if (p)
2362 WRITE_ONCE(p->privacy_mode, HCI_NETWORK_PRIVACY);
2363 rcu_read_unlock();
2364
2365done:
2366 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
2367 memcpy(cp.local_irk, hdev->irk, 16);
2368 else
2369 memset(cp.local_irk, 0, 16);
2370
2371 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
2372 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2373}
2374
2375/* Set Device Privacy Mode. */
2376static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
2377 struct conn_params *params)
2378{
2379 struct hci_cp_le_set_privacy_mode cp;
2380 struct smp_irk *irk;
2381
2382 /* If device privacy mode has already been set there is nothing to do */
2383 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
2384 return 0;
2385
2386 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
2387 * indicates that LL Privacy has been enabled and
2388 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
2389 */
2390 if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
2391 return 0;
2392
2393 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
2394 if (!irk)
2395 return 0;
2396
2397 memset(&cp, 0, sizeof(cp));
2398 cp.bdaddr_type = irk->addr_type;
2399 bacpy(&cp.bdaddr, &irk->bdaddr);
2400 cp.mode = HCI_DEVICE_PRIVACY;
2401
2402 /* Note: params->privacy_mode is not updated since it is a copy */
2403
2404 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
2405 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2406}
2407
2408/* Adds connection to allow list if needed, if the device uses RPA (has IRK)
2409 * this attempts to program the device in the resolving list as well and
2410 * properly set the privacy mode.
2411 */
2412static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
2413 struct conn_params *params,
2414 u8 *num_entries)
2415{
2416 struct hci_cp_le_add_to_accept_list cp;
2417 int err;
2418
2419 /* During suspend, only wakeable devices can be in acceptlist */
2420 if (hdev->suspended &&
2421 !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) {
2422 hci_le_del_accept_list_sync(hdev, ¶ms->addr,
2423 params->addr_type);
2424 return 0;
2425 }
2426
2427 /* Select filter policy to accept all advertising */
2428 if (*num_entries >= hdev->le_accept_list_size)
2429 return -ENOSPC;
2430
2431 /* Accept list can not be used with RPAs */
2432 if (!use_ll_privacy(hdev) &&
2433 hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type))
2434 return -EINVAL;
2435
2436 /* Attempt to program the device in the resolving list first to avoid
2437 * having to rollback in case it fails since the resolving list is
2438 * dynamic it can probably be smaller than the accept list.
2439 */
2440 err = hci_le_add_resolve_list_sync(hdev, params);
2441 if (err) {
2442 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
2443 return err;
2444 }
2445
2446 /* Set Privacy Mode */
2447 err = hci_le_set_privacy_mode_sync(hdev, params);
2448 if (err) {
2449 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
2450 return err;
2451 }
2452
2453 /* Check if already in accept list */
2454 if (hci_bdaddr_list_lookup(&hdev->le_accept_list, ¶ms->addr,
2455 params->addr_type))
2456 return 0;
2457
2458 *num_entries += 1;
2459 cp.bdaddr_type = params->addr_type;
2460 bacpy(&cp.bdaddr, ¶ms->addr);
2461
2462 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
2463 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2464 if (err) {
2465 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
2466 /* Rollback the device from the resolving list */
2467 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2468 return err;
2469 }
2470
2471 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
2472 cp.bdaddr_type);
2473
2474 return 0;
2475}
2476
2477/* This function disables/pause all advertising instances */
2478static int hci_pause_advertising_sync(struct hci_dev *hdev)
2479{
2480 int err;
2481 int old_state;
2482
2483 /* If already been paused there is nothing to do. */
2484 if (hdev->advertising_paused)
2485 return 0;
2486
2487 bt_dev_dbg(hdev, "Pausing directed advertising");
2488
2489 /* Stop directed advertising */
2490 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
2491 if (old_state) {
2492 /* When discoverable timeout triggers, then just make sure
2493 * the limited discoverable flag is cleared. Even in the case
2494 * of a timeout triggered from general discoverable, it is
2495 * safe to unconditionally clear the flag.
2496 */
2497 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
2498 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
2499 hdev->discov_timeout = 0;
2500 }
2501
2502 bt_dev_dbg(hdev, "Pausing advertising instances");
2503
2504 /* Call to disable any advertisements active on the controller.
2505 * This will succeed even if no advertisements are configured.
2506 */
2507 err = hci_disable_advertising_sync(hdev);
2508 if (err)
2509 return err;
2510
2511 /* If we are using software rotation, pause the loop */
2512 if (!ext_adv_capable(hdev))
2513 cancel_adv_timeout(hdev);
2514
2515 hdev->advertising_paused = true;
2516 hdev->advertising_old_state = old_state;
2517
2518 return 0;
2519}
2520
2521/* This function enables all user advertising instances */
2522static int hci_resume_advertising_sync(struct hci_dev *hdev)
2523{
2524 struct adv_info *adv, *tmp;
2525 int err;
2526
2527 /* If advertising has not been paused there is nothing to do. */
2528 if (!hdev->advertising_paused)
2529 return 0;
2530
2531 /* Resume directed advertising */
2532 hdev->advertising_paused = false;
2533 if (hdev->advertising_old_state) {
2534 hci_dev_set_flag(hdev, HCI_ADVERTISING);
2535 hdev->advertising_old_state = 0;
2536 }
2537
2538 bt_dev_dbg(hdev, "Resuming advertising instances");
2539
2540 if (ext_adv_capable(hdev)) {
2541 /* Call for each tracked instance to be re-enabled */
2542 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
2543 err = hci_enable_ext_advertising_sync(hdev,
2544 adv->instance);
2545 if (!err)
2546 continue;
2547
2548 /* If the instance cannot be resumed remove it */
2549 hci_remove_ext_adv_instance_sync(hdev, adv->instance,
2550 NULL);
2551 }
2552 } else {
2553 /* Schedule for most recent instance to be restarted and begin
2554 * the software rotation loop
2555 */
2556 err = hci_schedule_adv_instance_sync(hdev,
2557 hdev->cur_adv_instance,
2558 true);
2559 }
2560
2561 hdev->advertising_paused = false;
2562
2563 return err;
2564}
2565
2566static int hci_pause_addr_resolution(struct hci_dev *hdev)
2567{
2568 int err;
2569
2570 if (!use_ll_privacy(hdev))
2571 return 0;
2572
2573 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2574 return 0;
2575
2576 /* Cannot disable addr resolution if scanning is enabled or
2577 * when initiating an LE connection.
2578 */
2579 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2580 hci_lookup_le_connect(hdev)) {
2581 bt_dev_err(hdev, "Command not allowed when scan/LE connect");
2582 return -EPERM;
2583 }
2584
2585 /* Cannot disable addr resolution if advertising is enabled. */
2586 err = hci_pause_advertising_sync(hdev);
2587 if (err) {
2588 bt_dev_err(hdev, "Pause advertising failed: %d", err);
2589 return err;
2590 }
2591
2592 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2593 if (err)
2594 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
2595 err);
2596
2597 /* Return if address resolution is disabled and RPA is not used. */
2598 if (!err && scan_use_rpa(hdev))
2599 return 0;
2600
2601 hci_resume_advertising_sync(hdev);
2602 return err;
2603}
2604
2605struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
2606 bool extended, struct sock *sk)
2607{
2608 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
2609 HCI_OP_READ_LOCAL_OOB_DATA;
2610
2611 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
2612}
2613
2614static struct conn_params *conn_params_copy(struct list_head *list, size_t *n)
2615{
2616 struct hci_conn_params *params;
2617 struct conn_params *p;
2618 size_t i;
2619
2620 rcu_read_lock();
2621
2622 i = 0;
2623 list_for_each_entry_rcu(params, list, action)
2624 ++i;
2625 *n = i;
2626
2627 rcu_read_unlock();
2628
2629 p = kvcalloc(*n, sizeof(struct conn_params), GFP_KERNEL);
2630 if (!p)
2631 return NULL;
2632
2633 rcu_read_lock();
2634
2635 i = 0;
2636 list_for_each_entry_rcu(params, list, action) {
2637 /* Racing adds are handled in next scan update */
2638 if (i >= *n)
2639 break;
2640
2641 /* No hdev->lock, but: addr, addr_type are immutable.
2642 * privacy_mode is only written by us or in
2643 * hci_cc_le_set_privacy_mode that we wait for.
2644 * We should be idempotent so MGMT updating flags
2645 * while we are processing is OK.
2646 */
2647 bacpy(&p[i].addr, ¶ms->addr);
2648 p[i].addr_type = params->addr_type;
2649 p[i].flags = READ_ONCE(params->flags);
2650 p[i].privacy_mode = READ_ONCE(params->privacy_mode);
2651 ++i;
2652 }
2653
2654 rcu_read_unlock();
2655
2656 *n = i;
2657 return p;
2658}
2659
2660/* Clear LE Accept List */
2661static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
2662{
2663 if (!(hdev->commands[26] & 0x80))
2664 return 0;
2665
2666 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
2667 HCI_CMD_TIMEOUT);
2668}
2669
2670/* Device must not be scanning when updating the accept list.
2671 *
2672 * Update is done using the following sequence:
2673 *
2674 * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
2675 * Remove Devices From Accept List ->
2676 * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
2677 * Add Devices to Accept List ->
2678 * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
2679 * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
2680 * Enable Scanning
2681 *
2682 * In case of failure advertising shall be restored to its original state and
2683 * return would disable accept list since either accept or resolving list could
2684 * not be programmed.
2685 *
2686 */
2687static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
2688{
2689 struct conn_params *params;
2690 struct bdaddr_list *b, *t;
2691 u8 num_entries = 0;
2692 bool pend_conn, pend_report;
2693 u8 filter_policy;
2694 size_t i, n;
2695 int err;
2696
2697 /* Pause advertising if resolving list can be used as controllers
2698 * cannot accept resolving list modifications while advertising.
2699 */
2700 if (use_ll_privacy(hdev)) {
2701 err = hci_pause_advertising_sync(hdev);
2702 if (err) {
2703 bt_dev_err(hdev, "pause advertising failed: %d", err);
2704 return 0x00;
2705 }
2706 }
2707
2708 /* Disable address resolution while reprogramming accept list since
2709 * devices that do have an IRK will be programmed in the resolving list
2710 * when LL Privacy is enabled.
2711 */
2712 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2713 if (err) {
2714 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
2715 goto done;
2716 }
2717
2718 /* Force address filtering if PA Sync is in progress */
2719 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2720 struct hci_cp_le_pa_create_sync *sent;
2721
2722 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_PA_CREATE_SYNC);
2723 if (sent) {
2724 struct conn_params pa;
2725
2726 memset(&pa, 0, sizeof(pa));
2727
2728 bacpy(&pa.addr, &sent->addr);
2729 pa.addr_type = sent->addr_type;
2730
2731 /* Clear first since there could be addresses left
2732 * behind.
2733 */
2734 hci_le_clear_accept_list_sync(hdev);
2735
2736 num_entries = 1;
2737 err = hci_le_add_accept_list_sync(hdev, &pa,
2738 &num_entries);
2739 goto done;
2740 }
2741 }
2742
2743 /* Go through the current accept list programmed into the
2744 * controller one by one and check if that address is connected or is
2745 * still in the list of pending connections or list of devices to
2746 * report. If not present in either list, then remove it from
2747 * the controller.
2748 */
2749 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
2750 if (hci_conn_hash_lookup_le(hdev, &b->bdaddr, b->bdaddr_type))
2751 continue;
2752
2753 /* Pointers not dereferenced, no locks needed */
2754 pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2755 &b->bdaddr,
2756 b->bdaddr_type);
2757 pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2758 &b->bdaddr,
2759 b->bdaddr_type);
2760
2761 /* If the device is not likely to connect or report,
2762 * remove it from the acceptlist.
2763 */
2764 if (!pend_conn && !pend_report) {
2765 hci_le_del_accept_list_sync(hdev, &b->bdaddr,
2766 b->bdaddr_type);
2767 continue;
2768 }
2769
2770 num_entries++;
2771 }
2772
2773 /* Since all no longer valid accept list entries have been
2774 * removed, walk through the list of pending connections
2775 * and ensure that any new device gets programmed into
2776 * the controller.
2777 *
2778 * If the list of the devices is larger than the list of
2779 * available accept list entries in the controller, then
2780 * just abort and return filer policy value to not use the
2781 * accept list.
2782 *
2783 * The list and params may be mutated while we wait for events,
2784 * so make a copy and iterate it.
2785 */
2786
2787 params = conn_params_copy(&hdev->pend_le_conns, &n);
2788 if (!params) {
2789 err = -ENOMEM;
2790 goto done;
2791 }
2792
2793 for (i = 0; i < n; ++i) {
2794 err = hci_le_add_accept_list_sync(hdev, ¶ms[i],
2795 &num_entries);
2796 if (err) {
2797 kvfree(params);
2798 goto done;
2799 }
2800 }
2801
2802 kvfree(params);
2803
2804 /* After adding all new pending connections, walk through
2805 * the list of pending reports and also add these to the
2806 * accept list if there is still space. Abort if space runs out.
2807 */
2808
2809 params = conn_params_copy(&hdev->pend_le_reports, &n);
2810 if (!params) {
2811 err = -ENOMEM;
2812 goto done;
2813 }
2814
2815 for (i = 0; i < n; ++i) {
2816 err = hci_le_add_accept_list_sync(hdev, ¶ms[i],
2817 &num_entries);
2818 if (err) {
2819 kvfree(params);
2820 goto done;
2821 }
2822 }
2823
2824 kvfree(params);
2825
2826 /* Use the allowlist unless the following conditions are all true:
2827 * - We are not currently suspending
2828 * - There are 1 or more ADV monitors registered and it's not offloaded
2829 * - Interleaved scanning is not currently using the allowlist
2830 */
2831 if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
2832 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
2833 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
2834 err = -EINVAL;
2835
2836done:
2837 filter_policy = err ? 0x00 : 0x01;
2838
2839 /* Enable address resolution when LL Privacy is enabled. */
2840 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2841 if (err)
2842 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
2843
2844 /* Resume advertising if it was paused */
2845 if (use_ll_privacy(hdev))
2846 hci_resume_advertising_sync(hdev);
2847
2848 /* Select filter policy to use accept list */
2849 return filter_policy;
2850}
2851
2852static void hci_le_scan_phy_params(struct hci_cp_le_scan_phy_params *cp,
2853 u8 type, u16 interval, u16 window)
2854{
2855 cp->type = type;
2856 cp->interval = cpu_to_le16(interval);
2857 cp->window = cpu_to_le16(window);
2858}
2859
2860static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
2861 u16 interval, u16 window,
2862 u8 own_addr_type, u8 filter_policy)
2863{
2864 struct hci_cp_le_set_ext_scan_params *cp;
2865 struct hci_cp_le_scan_phy_params *phy;
2866 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
2867 u8 num_phy = 0x00;
2868
2869 cp = (void *)data;
2870 phy = (void *)cp->data;
2871
2872 memset(data, 0, sizeof(data));
2873
2874 cp->own_addr_type = own_addr_type;
2875 cp->filter_policy = filter_policy;
2876
2877 /* Check if PA Sync is in progress then select the PHY based on the
2878 * hci_conn.iso_qos.
2879 */
2880 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2881 struct hci_cp_le_add_to_accept_list *sent;
2882
2883 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
2884 if (sent) {
2885 struct hci_conn *conn;
2886
2887 conn = hci_conn_hash_lookup_ba(hdev, ISO_LINK,
2888 &sent->bdaddr);
2889 if (conn) {
2890 struct bt_iso_qos *qos = &conn->iso_qos;
2891
2892 if (qos->bcast.in.phy & BT_ISO_PHY_1M ||
2893 qos->bcast.in.phy & BT_ISO_PHY_2M) {
2894 cp->scanning_phys |= LE_SCAN_PHY_1M;
2895 hci_le_scan_phy_params(phy, type,
2896 interval,
2897 window);
2898 num_phy++;
2899 phy++;
2900 }
2901
2902 if (qos->bcast.in.phy & BT_ISO_PHY_CODED) {
2903 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2904 hci_le_scan_phy_params(phy, type,
2905 interval * 3,
2906 window * 3);
2907 num_phy++;
2908 phy++;
2909 }
2910
2911 if (num_phy)
2912 goto done;
2913 }
2914 }
2915 }
2916
2917 if (scan_1m(hdev) || scan_2m(hdev)) {
2918 cp->scanning_phys |= LE_SCAN_PHY_1M;
2919 hci_le_scan_phy_params(phy, type, interval, window);
2920 num_phy++;
2921 phy++;
2922 }
2923
2924 if (scan_coded(hdev)) {
2925 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2926 hci_le_scan_phy_params(phy, type, interval * 3, window * 3);
2927 num_phy++;
2928 phy++;
2929 }
2930
2931done:
2932 if (!num_phy)
2933 return -EINVAL;
2934
2935 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
2936 sizeof(*cp) + sizeof(*phy) * num_phy,
2937 data, HCI_CMD_TIMEOUT);
2938}
2939
2940static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
2941 u16 interval, u16 window,
2942 u8 own_addr_type, u8 filter_policy)
2943{
2944 struct hci_cp_le_set_scan_param cp;
2945
2946 if (use_ext_scan(hdev))
2947 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
2948 window, own_addr_type,
2949 filter_policy);
2950
2951 memset(&cp, 0, sizeof(cp));
2952 cp.type = type;
2953 cp.interval = cpu_to_le16(interval);
2954 cp.window = cpu_to_le16(window);
2955 cp.own_address_type = own_addr_type;
2956 cp.filter_policy = filter_policy;
2957
2958 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
2959 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2960}
2961
2962static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
2963 u16 window, u8 own_addr_type, u8 filter_policy,
2964 u8 filter_dup)
2965{
2966 int err;
2967
2968 if (hdev->scanning_paused) {
2969 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2970 return 0;
2971 }
2972
2973 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
2974 own_addr_type, filter_policy);
2975 if (err)
2976 return err;
2977
2978 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
2979}
2980
2981static int hci_passive_scan_sync(struct hci_dev *hdev)
2982{
2983 u8 own_addr_type;
2984 u8 filter_policy;
2985 u16 window, interval;
2986 u8 filter_dups = LE_SCAN_FILTER_DUP_ENABLE;
2987 int err;
2988
2989 if (hdev->scanning_paused) {
2990 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2991 return 0;
2992 }
2993
2994 err = hci_scan_disable_sync(hdev);
2995 if (err) {
2996 bt_dev_err(hdev, "disable scanning failed: %d", err);
2997 return err;
2998 }
2999
3000 /* Set require_privacy to false since no SCAN_REQ are send
3001 * during passive scanning. Not using an non-resolvable address
3002 * here is important so that peer devices using direct
3003 * advertising with our address will be correctly reported
3004 * by the controller.
3005 */
3006 if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
3007 &own_addr_type))
3008 return 0;
3009
3010 if (hdev->enable_advmon_interleave_scan &&
3011 hci_update_interleaved_scan_sync(hdev))
3012 return 0;
3013
3014 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
3015
3016 /* Adding or removing entries from the accept list must
3017 * happen before enabling scanning. The controller does
3018 * not allow accept list modification while scanning.
3019 */
3020 filter_policy = hci_update_accept_list_sync(hdev);
3021
3022 /* If suspended and filter_policy set to 0x00 (no acceptlist) then
3023 * passive scanning cannot be started since that would require the host
3024 * to be woken up to process the reports.
3025 */
3026 if (hdev->suspended && !filter_policy) {
3027 /* Check if accept list is empty then there is no need to scan
3028 * while suspended.
3029 */
3030 if (list_empty(&hdev->le_accept_list))
3031 return 0;
3032
3033 /* If there are devices is the accept_list that means some
3034 * devices could not be programmed which in non-suspended case
3035 * means filter_policy needs to be set to 0x00 so the host needs
3036 * to filter, but since this is treating suspended case we
3037 * can ignore device needing host to filter to allow devices in
3038 * the acceptlist to be able to wakeup the system.
3039 */
3040 filter_policy = 0x01;
3041 }
3042
3043 /* When the controller is using random resolvable addresses and
3044 * with that having LE privacy enabled, then controllers with
3045 * Extended Scanner Filter Policies support can now enable support
3046 * for handling directed advertising.
3047 *
3048 * So instead of using filter polices 0x00 (no acceptlist)
3049 * and 0x01 (acceptlist enabled) use the new filter policies
3050 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
3051 */
3052 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
3053 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
3054 filter_policy |= 0x02;
3055
3056 if (hdev->suspended) {
3057 window = hdev->le_scan_window_suspend;
3058 interval = hdev->le_scan_int_suspend;
3059 } else if (hci_is_le_conn_scanning(hdev)) {
3060 window = hdev->le_scan_window_connect;
3061 interval = hdev->le_scan_int_connect;
3062 } else if (hci_is_adv_monitoring(hdev)) {
3063 window = hdev->le_scan_window_adv_monitor;
3064 interval = hdev->le_scan_int_adv_monitor;
3065
3066 /* Disable duplicates filter when scanning for advertisement
3067 * monitor for the following reasons.
3068 *
3069 * For HW pattern filtering (ex. MSFT), Realtek and Qualcomm
3070 * controllers ignore RSSI_Sampling_Period when the duplicates
3071 * filter is enabled.
3072 *
3073 * For SW pattern filtering, when we're not doing interleaved
3074 * scanning, it is necessary to disable duplicates filter,
3075 * otherwise hosts can only receive one advertisement and it's
3076 * impossible to know if a peer is still in range.
3077 */
3078 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
3079 } else {
3080 window = hdev->le_scan_window;
3081 interval = hdev->le_scan_interval;
3082 }
3083
3084 /* Disable all filtering for Mesh */
3085 if (hci_dev_test_flag(hdev, HCI_MESH)) {
3086 filter_policy = 0;
3087 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
3088 }
3089
3090 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
3091
3092 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
3093 own_addr_type, filter_policy, filter_dups);
3094}
3095
3096/* This function controls the passive scanning based on hdev->pend_le_conns
3097 * list. If there are pending LE connection we start the background scanning,
3098 * otherwise we stop it in the following sequence:
3099 *
3100 * If there are devices to scan:
3101 *
3102 * Disable Scanning -> Update Accept List ->
3103 * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
3104 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
3105 * Enable Scanning
3106 *
3107 * Otherwise:
3108 *
3109 * Disable Scanning
3110 */
3111int hci_update_passive_scan_sync(struct hci_dev *hdev)
3112{
3113 int err;
3114
3115 if (!test_bit(HCI_UP, &hdev->flags) ||
3116 test_bit(HCI_INIT, &hdev->flags) ||
3117 hci_dev_test_flag(hdev, HCI_SETUP) ||
3118 hci_dev_test_flag(hdev, HCI_CONFIG) ||
3119 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
3120 hci_dev_test_flag(hdev, HCI_UNREGISTER))
3121 return 0;
3122
3123 /* No point in doing scanning if LE support hasn't been enabled */
3124 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
3125 return 0;
3126
3127 /* If discovery is active don't interfere with it */
3128 if (hdev->discovery.state != DISCOVERY_STOPPED)
3129 return 0;
3130
3131 /* Reset RSSI and UUID filters when starting background scanning
3132 * since these filters are meant for service discovery only.
3133 *
3134 * The Start Discovery and Start Service Discovery operations
3135 * ensure to set proper values for RSSI threshold and UUID
3136 * filter list. So it is safe to just reset them here.
3137 */
3138 hci_discovery_filter_clear(hdev);
3139
3140 bt_dev_dbg(hdev, "ADV monitoring is %s",
3141 hci_is_adv_monitoring(hdev) ? "on" : "off");
3142
3143 if (!hci_dev_test_flag(hdev, HCI_MESH) &&
3144 list_empty(&hdev->pend_le_conns) &&
3145 list_empty(&hdev->pend_le_reports) &&
3146 !hci_is_adv_monitoring(hdev) &&
3147 !hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
3148 /* If there is no pending LE connections or devices
3149 * to be scanned for or no ADV monitors, we should stop the
3150 * background scanning.
3151 */
3152
3153 bt_dev_dbg(hdev, "stopping background scanning");
3154
3155 err = hci_scan_disable_sync(hdev);
3156 if (err)
3157 bt_dev_err(hdev, "stop background scanning failed: %d",
3158 err);
3159 } else {
3160 /* If there is at least one pending LE connection, we should
3161 * keep the background scan running.
3162 */
3163
3164 /* If controller is connecting, we should not start scanning
3165 * since some controllers are not able to scan and connect at
3166 * the same time.
3167 */
3168 if (hci_lookup_le_connect(hdev))
3169 return 0;
3170
3171 bt_dev_dbg(hdev, "start background scanning");
3172
3173 err = hci_passive_scan_sync(hdev);
3174 if (err)
3175 bt_dev_err(hdev, "start background scanning failed: %d",
3176 err);
3177 }
3178
3179 return err;
3180}
3181
3182static int update_scan_sync(struct hci_dev *hdev, void *data)
3183{
3184 return hci_update_scan_sync(hdev);
3185}
3186
3187int hci_update_scan(struct hci_dev *hdev)
3188{
3189 return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL);
3190}
3191
3192static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
3193{
3194 return hci_update_passive_scan_sync(hdev);
3195}
3196
3197int hci_update_passive_scan(struct hci_dev *hdev)
3198{
3199 /* Only queue if it would have any effect */
3200 if (!test_bit(HCI_UP, &hdev->flags) ||
3201 test_bit(HCI_INIT, &hdev->flags) ||
3202 hci_dev_test_flag(hdev, HCI_SETUP) ||
3203 hci_dev_test_flag(hdev, HCI_CONFIG) ||
3204 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
3205 hci_dev_test_flag(hdev, HCI_UNREGISTER))
3206 return 0;
3207
3208 return hci_cmd_sync_queue_once(hdev, update_passive_scan_sync, NULL,
3209 NULL);
3210}
3211
3212int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
3213{
3214 int err;
3215
3216 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
3217 return 0;
3218
3219 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
3220 sizeof(val), &val, HCI_CMD_TIMEOUT);
3221
3222 if (!err) {
3223 if (val) {
3224 hdev->features[1][0] |= LMP_HOST_SC;
3225 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
3226 } else {
3227 hdev->features[1][0] &= ~LMP_HOST_SC;
3228 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
3229 }
3230 }
3231
3232 return err;
3233}
3234
3235int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
3236{
3237 int err;
3238
3239 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
3240 lmp_host_ssp_capable(hdev))
3241 return 0;
3242
3243 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
3244 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
3245 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3246 }
3247
3248 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3249 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3250 if (err)
3251 return err;
3252
3253 return hci_write_sc_support_sync(hdev, 0x01);
3254}
3255
3256int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
3257{
3258 struct hci_cp_write_le_host_supported cp;
3259
3260 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
3261 !lmp_bredr_capable(hdev))
3262 return 0;
3263
3264 /* Check first if we already have the right host state
3265 * (host features set)
3266 */
3267 if (le == lmp_host_le_capable(hdev) &&
3268 simul == lmp_host_le_br_capable(hdev))
3269 return 0;
3270
3271 memset(&cp, 0, sizeof(cp));
3272
3273 cp.le = le;
3274 cp.simul = simul;
3275
3276 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
3277 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3278}
3279
3280static int hci_powered_update_adv_sync(struct hci_dev *hdev)
3281{
3282 struct adv_info *adv, *tmp;
3283 int err;
3284
3285 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
3286 return 0;
3287
3288 /* If RPA Resolution has not been enable yet it means the
3289 * resolving list is empty and we should attempt to program the
3290 * local IRK in order to support using own_addr_type
3291 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
3292 */
3293 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
3294 hci_le_add_resolve_list_sync(hdev, NULL);
3295 hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
3296 }
3297
3298 /* Make sure the controller has a good default for
3299 * advertising data. This also applies to the case
3300 * where BR/EDR was toggled during the AUTO_OFF phase.
3301 */
3302 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
3303 list_empty(&hdev->adv_instances)) {
3304 if (ext_adv_capable(hdev)) {
3305 err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
3306 if (!err)
3307 hci_update_scan_rsp_data_sync(hdev, 0x00);
3308 } else {
3309 err = hci_update_adv_data_sync(hdev, 0x00);
3310 if (!err)
3311 hci_update_scan_rsp_data_sync(hdev, 0x00);
3312 }
3313
3314 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
3315 hci_enable_advertising_sync(hdev);
3316 }
3317
3318 /* Call for each tracked instance to be scheduled */
3319 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
3320 hci_schedule_adv_instance_sync(hdev, adv->instance, true);
3321
3322 return 0;
3323}
3324
3325static int hci_write_auth_enable_sync(struct hci_dev *hdev)
3326{
3327 u8 link_sec;
3328
3329 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
3330 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
3331 return 0;
3332
3333 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
3334 sizeof(link_sec), &link_sec,
3335 HCI_CMD_TIMEOUT);
3336}
3337
3338int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
3339{
3340 struct hci_cp_write_page_scan_activity cp;
3341 u8 type;
3342 int err = 0;
3343
3344 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3345 return 0;
3346
3347 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3348 return 0;
3349
3350 memset(&cp, 0, sizeof(cp));
3351
3352 if (enable) {
3353 type = PAGE_SCAN_TYPE_INTERLACED;
3354
3355 /* 160 msec page scan interval */
3356 cp.interval = cpu_to_le16(0x0100);
3357 } else {
3358 type = hdev->def_page_scan_type;
3359 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
3360 }
3361
3362 cp.window = cpu_to_le16(hdev->def_page_scan_window);
3363
3364 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
3365 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
3366 err = __hci_cmd_sync_status(hdev,
3367 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
3368 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3369 if (err)
3370 return err;
3371 }
3372
3373 if (hdev->page_scan_type != type)
3374 err = __hci_cmd_sync_status(hdev,
3375 HCI_OP_WRITE_PAGE_SCAN_TYPE,
3376 sizeof(type), &type,
3377 HCI_CMD_TIMEOUT);
3378
3379 return err;
3380}
3381
3382static bool disconnected_accept_list_entries(struct hci_dev *hdev)
3383{
3384 struct bdaddr_list *b;
3385
3386 list_for_each_entry(b, &hdev->accept_list, list) {
3387 struct hci_conn *conn;
3388
3389 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
3390 if (!conn)
3391 return true;
3392
3393 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3394 return true;
3395 }
3396
3397 return false;
3398}
3399
3400static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
3401{
3402 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
3403 sizeof(val), &val,
3404 HCI_CMD_TIMEOUT);
3405}
3406
3407int hci_update_scan_sync(struct hci_dev *hdev)
3408{
3409 u8 scan;
3410
3411 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3412 return 0;
3413
3414 if (!hdev_is_powered(hdev))
3415 return 0;
3416
3417 if (mgmt_powering_down(hdev))
3418 return 0;
3419
3420 if (hdev->scanning_paused)
3421 return 0;
3422
3423 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
3424 disconnected_accept_list_entries(hdev))
3425 scan = SCAN_PAGE;
3426 else
3427 scan = SCAN_DISABLED;
3428
3429 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
3430 scan |= SCAN_INQUIRY;
3431
3432 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
3433 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
3434 return 0;
3435
3436 return hci_write_scan_enable_sync(hdev, scan);
3437}
3438
3439int hci_update_name_sync(struct hci_dev *hdev)
3440{
3441 struct hci_cp_write_local_name cp;
3442
3443 memset(&cp, 0, sizeof(cp));
3444
3445 memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
3446
3447 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
3448 sizeof(cp), &cp,
3449 HCI_CMD_TIMEOUT);
3450}
3451
3452/* This function perform powered update HCI command sequence after the HCI init
3453 * sequence which end up resetting all states, the sequence is as follows:
3454 *
3455 * HCI_SSP_ENABLED(Enable SSP)
3456 * HCI_LE_ENABLED(Enable LE)
3457 * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
3458 * Update adv data)
3459 * Enable Authentication
3460 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
3461 * Set Name -> Set EIR)
3462 * HCI_FORCE_STATIC_ADDR | BDADDR_ANY && !HCI_BREDR_ENABLED (Set Static Address)
3463 */
3464int hci_powered_update_sync(struct hci_dev *hdev)
3465{
3466 int err;
3467
3468 /* Register the available SMP channels (BR/EDR and LE) only when
3469 * successfully powering on the controller. This late
3470 * registration is required so that LE SMP can clearly decide if
3471 * the public address or static address is used.
3472 */
3473 smp_register(hdev);
3474
3475 err = hci_write_ssp_mode_sync(hdev, 0x01);
3476 if (err)
3477 return err;
3478
3479 err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
3480 if (err)
3481 return err;
3482
3483 err = hci_powered_update_adv_sync(hdev);
3484 if (err)
3485 return err;
3486
3487 err = hci_write_auth_enable_sync(hdev);
3488 if (err)
3489 return err;
3490
3491 if (lmp_bredr_capable(hdev)) {
3492 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
3493 hci_write_fast_connectable_sync(hdev, true);
3494 else
3495 hci_write_fast_connectable_sync(hdev, false);
3496 hci_update_scan_sync(hdev);
3497 hci_update_class_sync(hdev);
3498 hci_update_name_sync(hdev);
3499 hci_update_eir_sync(hdev);
3500 }
3501
3502 /* If forcing static address is in use or there is no public
3503 * address use the static address as random address (but skip
3504 * the HCI command if the current random address is already the
3505 * static one.
3506 *
3507 * In case BR/EDR has been disabled on a dual-mode controller
3508 * and a static address has been configured, then use that
3509 * address instead of the public BR/EDR address.
3510 */
3511 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3512 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3513 !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))) {
3514 if (bacmp(&hdev->static_addr, BDADDR_ANY))
3515 return hci_set_random_addr_sync(hdev,
3516 &hdev->static_addr);
3517 }
3518
3519 return 0;
3520}
3521
3522/**
3523 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
3524 * (BD_ADDR) for a HCI device from
3525 * a firmware node property.
3526 * @hdev: The HCI device
3527 *
3528 * Search the firmware node for 'local-bd-address'.
3529 *
3530 * All-zero BD addresses are rejected, because those could be properties
3531 * that exist in the firmware tables, but were not updated by the firmware. For
3532 * example, the DTS could define 'local-bd-address', with zero BD addresses.
3533 */
3534static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
3535{
3536 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
3537 bdaddr_t ba;
3538 int ret;
3539
3540 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
3541 (u8 *)&ba, sizeof(ba));
3542 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
3543 return;
3544
3545 if (test_bit(HCI_QUIRK_BDADDR_PROPERTY_BROKEN, &hdev->quirks))
3546 baswap(&hdev->public_addr, &ba);
3547 else
3548 bacpy(&hdev->public_addr, &ba);
3549}
3550
3551struct hci_init_stage {
3552 int (*func)(struct hci_dev *hdev);
3553};
3554
3555/* Run init stage NULL terminated function table */
3556static int hci_init_stage_sync(struct hci_dev *hdev,
3557 const struct hci_init_stage *stage)
3558{
3559 size_t i;
3560
3561 for (i = 0; stage[i].func; i++) {
3562 int err;
3563
3564 err = stage[i].func(hdev);
3565 if (err)
3566 return err;
3567 }
3568
3569 return 0;
3570}
3571
3572/* Read Local Version */
3573static int hci_read_local_version_sync(struct hci_dev *hdev)
3574{
3575 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
3576 0, NULL, HCI_CMD_TIMEOUT);
3577}
3578
3579/* Read BD Address */
3580static int hci_read_bd_addr_sync(struct hci_dev *hdev)
3581{
3582 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
3583 0, NULL, HCI_CMD_TIMEOUT);
3584}
3585
3586#define HCI_INIT(_func) \
3587{ \
3588 .func = _func, \
3589}
3590
3591static const struct hci_init_stage hci_init0[] = {
3592 /* HCI_OP_READ_LOCAL_VERSION */
3593 HCI_INIT(hci_read_local_version_sync),
3594 /* HCI_OP_READ_BD_ADDR */
3595 HCI_INIT(hci_read_bd_addr_sync),
3596 {}
3597};
3598
3599int hci_reset_sync(struct hci_dev *hdev)
3600{
3601 int err;
3602
3603 set_bit(HCI_RESET, &hdev->flags);
3604
3605 err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
3606 HCI_CMD_TIMEOUT);
3607 if (err)
3608 return err;
3609
3610 return 0;
3611}
3612
3613static int hci_init0_sync(struct hci_dev *hdev)
3614{
3615 int err;
3616
3617 bt_dev_dbg(hdev, "");
3618
3619 /* Reset */
3620 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3621 err = hci_reset_sync(hdev);
3622 if (err)
3623 return err;
3624 }
3625
3626 return hci_init_stage_sync(hdev, hci_init0);
3627}
3628
3629static int hci_unconf_init_sync(struct hci_dev *hdev)
3630{
3631 int err;
3632
3633 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3634 return 0;
3635
3636 err = hci_init0_sync(hdev);
3637 if (err < 0)
3638 return err;
3639
3640 if (hci_dev_test_flag(hdev, HCI_SETUP))
3641 hci_debugfs_create_basic(hdev);
3642
3643 return 0;
3644}
3645
3646/* Read Local Supported Features. */
3647static int hci_read_local_features_sync(struct hci_dev *hdev)
3648{
3649 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
3650 0, NULL, HCI_CMD_TIMEOUT);
3651}
3652
3653/* BR Controller init stage 1 command sequence */
3654static const struct hci_init_stage br_init1[] = {
3655 /* HCI_OP_READ_LOCAL_FEATURES */
3656 HCI_INIT(hci_read_local_features_sync),
3657 /* HCI_OP_READ_LOCAL_VERSION */
3658 HCI_INIT(hci_read_local_version_sync),
3659 /* HCI_OP_READ_BD_ADDR */
3660 HCI_INIT(hci_read_bd_addr_sync),
3661 {}
3662};
3663
3664/* Read Local Commands */
3665static int hci_read_local_cmds_sync(struct hci_dev *hdev)
3666{
3667 /* All Bluetooth 1.2 and later controllers should support the
3668 * HCI command for reading the local supported commands.
3669 *
3670 * Unfortunately some controllers indicate Bluetooth 1.2 support,
3671 * but do not have support for this command. If that is the case,
3672 * the driver can quirk the behavior and skip reading the local
3673 * supported commands.
3674 */
3675 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
3676 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
3677 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
3678 0, NULL, HCI_CMD_TIMEOUT);
3679
3680 return 0;
3681}
3682
3683static int hci_init1_sync(struct hci_dev *hdev)
3684{
3685 int err;
3686
3687 bt_dev_dbg(hdev, "");
3688
3689 /* Reset */
3690 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3691 err = hci_reset_sync(hdev);
3692 if (err)
3693 return err;
3694 }
3695
3696 return hci_init_stage_sync(hdev, br_init1);
3697}
3698
3699/* Read Buffer Size (ACL mtu, max pkt, etc.) */
3700static int hci_read_buffer_size_sync(struct hci_dev *hdev)
3701{
3702 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
3703 0, NULL, HCI_CMD_TIMEOUT);
3704}
3705
3706/* Read Class of Device */
3707static int hci_read_dev_class_sync(struct hci_dev *hdev)
3708{
3709 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
3710 0, NULL, HCI_CMD_TIMEOUT);
3711}
3712
3713/* Read Local Name */
3714static int hci_read_local_name_sync(struct hci_dev *hdev)
3715{
3716 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
3717 0, NULL, HCI_CMD_TIMEOUT);
3718}
3719
3720/* Read Voice Setting */
3721static int hci_read_voice_setting_sync(struct hci_dev *hdev)
3722{
3723 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
3724 0, NULL, HCI_CMD_TIMEOUT);
3725}
3726
3727/* Read Number of Supported IAC */
3728static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
3729{
3730 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
3731 0, NULL, HCI_CMD_TIMEOUT);
3732}
3733
3734/* Read Current IAC LAP */
3735static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
3736{
3737 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
3738 0, NULL, HCI_CMD_TIMEOUT);
3739}
3740
3741static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
3742 u8 cond_type, bdaddr_t *bdaddr,
3743 u8 auto_accept)
3744{
3745 struct hci_cp_set_event_filter cp;
3746
3747 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3748 return 0;
3749
3750 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3751 return 0;
3752
3753 memset(&cp, 0, sizeof(cp));
3754 cp.flt_type = flt_type;
3755
3756 if (flt_type != HCI_FLT_CLEAR_ALL) {
3757 cp.cond_type = cond_type;
3758 bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
3759 cp.addr_conn_flt.auto_accept = auto_accept;
3760 }
3761
3762 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
3763 flt_type == HCI_FLT_CLEAR_ALL ?
3764 sizeof(cp.flt_type) : sizeof(cp), &cp,
3765 HCI_CMD_TIMEOUT);
3766}
3767
3768static int hci_clear_event_filter_sync(struct hci_dev *hdev)
3769{
3770 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
3771 return 0;
3772
3773 /* In theory the state machine should not reach here unless
3774 * a hci_set_event_filter_sync() call succeeds, but we do
3775 * the check both for parity and as a future reminder.
3776 */
3777 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3778 return 0;
3779
3780 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
3781 BDADDR_ANY, 0x00);
3782}
3783
3784/* Connection accept timeout ~20 secs */
3785static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
3786{
3787 __le16 param = cpu_to_le16(0x7d00);
3788
3789 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
3790 sizeof(param), ¶m, HCI_CMD_TIMEOUT);
3791}
3792
3793/* BR Controller init stage 2 command sequence */
3794static const struct hci_init_stage br_init2[] = {
3795 /* HCI_OP_READ_BUFFER_SIZE */
3796 HCI_INIT(hci_read_buffer_size_sync),
3797 /* HCI_OP_READ_CLASS_OF_DEV */
3798 HCI_INIT(hci_read_dev_class_sync),
3799 /* HCI_OP_READ_LOCAL_NAME */
3800 HCI_INIT(hci_read_local_name_sync),
3801 /* HCI_OP_READ_VOICE_SETTING */
3802 HCI_INIT(hci_read_voice_setting_sync),
3803 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
3804 HCI_INIT(hci_read_num_supported_iac_sync),
3805 /* HCI_OP_READ_CURRENT_IAC_LAP */
3806 HCI_INIT(hci_read_current_iac_lap_sync),
3807 /* HCI_OP_SET_EVENT_FLT */
3808 HCI_INIT(hci_clear_event_filter_sync),
3809 /* HCI_OP_WRITE_CA_TIMEOUT */
3810 HCI_INIT(hci_write_ca_timeout_sync),
3811 {}
3812};
3813
3814static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
3815{
3816 u8 mode = 0x01;
3817
3818 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3819 return 0;
3820
3821 /* When SSP is available, then the host features page
3822 * should also be available as well. However some
3823 * controllers list the max_page as 0 as long as SSP
3824 * has not been enabled. To achieve proper debugging
3825 * output, force the minimum max_page to 1 at least.
3826 */
3827 hdev->max_page = 0x01;
3828
3829 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3830 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3831}
3832
3833static int hci_write_eir_sync(struct hci_dev *hdev)
3834{
3835 struct hci_cp_write_eir cp;
3836
3837 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3838 return 0;
3839
3840 memset(hdev->eir, 0, sizeof(hdev->eir));
3841 memset(&cp, 0, sizeof(cp));
3842
3843 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
3844 HCI_CMD_TIMEOUT);
3845}
3846
3847static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
3848{
3849 u8 mode;
3850
3851 if (!lmp_inq_rssi_capable(hdev) &&
3852 !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3853 return 0;
3854
3855 /* If Extended Inquiry Result events are supported, then
3856 * they are clearly preferred over Inquiry Result with RSSI
3857 * events.
3858 */
3859 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
3860
3861 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
3862 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3863}
3864
3865static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
3866{
3867 if (!lmp_inq_tx_pwr_capable(hdev))
3868 return 0;
3869
3870 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
3871 0, NULL, HCI_CMD_TIMEOUT);
3872}
3873
3874static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
3875{
3876 struct hci_cp_read_local_ext_features cp;
3877
3878 if (!lmp_ext_feat_capable(hdev))
3879 return 0;
3880
3881 memset(&cp, 0, sizeof(cp));
3882 cp.page = page;
3883
3884 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
3885 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3886}
3887
3888static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
3889{
3890 return hci_read_local_ext_features_sync(hdev, 0x01);
3891}
3892
3893/* HCI Controller init stage 2 command sequence */
3894static const struct hci_init_stage hci_init2[] = {
3895 /* HCI_OP_READ_LOCAL_COMMANDS */
3896 HCI_INIT(hci_read_local_cmds_sync),
3897 /* HCI_OP_WRITE_SSP_MODE */
3898 HCI_INIT(hci_write_ssp_mode_1_sync),
3899 /* HCI_OP_WRITE_EIR */
3900 HCI_INIT(hci_write_eir_sync),
3901 /* HCI_OP_WRITE_INQUIRY_MODE */
3902 HCI_INIT(hci_write_inquiry_mode_sync),
3903 /* HCI_OP_READ_INQ_RSP_TX_POWER */
3904 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
3905 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3906 HCI_INIT(hci_read_local_ext_features_1_sync),
3907 /* HCI_OP_WRITE_AUTH_ENABLE */
3908 HCI_INIT(hci_write_auth_enable_sync),
3909 {}
3910};
3911
3912/* Read LE Buffer Size */
3913static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
3914{
3915 /* Use Read LE Buffer Size V2 if supported */
3916 if (iso_capable(hdev) && hdev->commands[41] & 0x20)
3917 return __hci_cmd_sync_status(hdev,
3918 HCI_OP_LE_READ_BUFFER_SIZE_V2,
3919 0, NULL, HCI_CMD_TIMEOUT);
3920
3921 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
3922 0, NULL, HCI_CMD_TIMEOUT);
3923}
3924
3925/* Read LE Local Supported Features */
3926static int hci_le_read_local_features_sync(struct hci_dev *hdev)
3927{
3928 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
3929 0, NULL, HCI_CMD_TIMEOUT);
3930}
3931
3932/* Read LE Supported States */
3933static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
3934{
3935 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
3936 0, NULL, HCI_CMD_TIMEOUT);
3937}
3938
3939/* LE Controller init stage 2 command sequence */
3940static const struct hci_init_stage le_init2[] = {
3941 /* HCI_OP_LE_READ_LOCAL_FEATURES */
3942 HCI_INIT(hci_le_read_local_features_sync),
3943 /* HCI_OP_LE_READ_BUFFER_SIZE */
3944 HCI_INIT(hci_le_read_buffer_size_sync),
3945 /* HCI_OP_LE_READ_SUPPORTED_STATES */
3946 HCI_INIT(hci_le_read_supported_states_sync),
3947 {}
3948};
3949
3950static int hci_init2_sync(struct hci_dev *hdev)
3951{
3952 int err;
3953
3954 bt_dev_dbg(hdev, "");
3955
3956 err = hci_init_stage_sync(hdev, hci_init2);
3957 if (err)
3958 return err;
3959
3960 if (lmp_bredr_capable(hdev)) {
3961 err = hci_init_stage_sync(hdev, br_init2);
3962 if (err)
3963 return err;
3964 } else {
3965 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
3966 }
3967
3968 if (lmp_le_capable(hdev)) {
3969 err = hci_init_stage_sync(hdev, le_init2);
3970 if (err)
3971 return err;
3972 /* LE-only controllers have LE implicitly enabled */
3973 if (!lmp_bredr_capable(hdev))
3974 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
3975 }
3976
3977 return 0;
3978}
3979
3980static int hci_set_event_mask_sync(struct hci_dev *hdev)
3981{
3982 /* The second byte is 0xff instead of 0x9f (two reserved bits
3983 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
3984 * command otherwise.
3985 */
3986 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
3987
3988 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
3989 * any event mask for pre 1.2 devices.
3990 */
3991 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3992 return 0;
3993
3994 if (lmp_bredr_capable(hdev)) {
3995 events[4] |= 0x01; /* Flow Specification Complete */
3996
3997 /* Don't set Disconnect Complete and mode change when
3998 * suspended as that would wakeup the host when disconnecting
3999 * due to suspend.
4000 */
4001 if (hdev->suspended) {
4002 events[0] &= 0xef;
4003 events[2] &= 0xf7;
4004 }
4005 } else {
4006 /* Use a different default for LE-only devices */
4007 memset(events, 0, sizeof(events));
4008 events[1] |= 0x20; /* Command Complete */
4009 events[1] |= 0x40; /* Command Status */
4010 events[1] |= 0x80; /* Hardware Error */
4011
4012 /* If the controller supports the Disconnect command, enable
4013 * the corresponding event. In addition enable packet flow
4014 * control related events.
4015 */
4016 if (hdev->commands[0] & 0x20) {
4017 /* Don't set Disconnect Complete when suspended as that
4018 * would wakeup the host when disconnecting due to
4019 * suspend.
4020 */
4021 if (!hdev->suspended)
4022 events[0] |= 0x10; /* Disconnection Complete */
4023 events[2] |= 0x04; /* Number of Completed Packets */
4024 events[3] |= 0x02; /* Data Buffer Overflow */
4025 }
4026
4027 /* If the controller supports the Read Remote Version
4028 * Information command, enable the corresponding event.
4029 */
4030 if (hdev->commands[2] & 0x80)
4031 events[1] |= 0x08; /* Read Remote Version Information
4032 * Complete
4033 */
4034
4035 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
4036 events[0] |= 0x80; /* Encryption Change */
4037 events[5] |= 0x80; /* Encryption Key Refresh Complete */
4038 }
4039 }
4040
4041 if (lmp_inq_rssi_capable(hdev) ||
4042 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
4043 events[4] |= 0x02; /* Inquiry Result with RSSI */
4044
4045 if (lmp_ext_feat_capable(hdev))
4046 events[4] |= 0x04; /* Read Remote Extended Features Complete */
4047
4048 if (lmp_esco_capable(hdev)) {
4049 events[5] |= 0x08; /* Synchronous Connection Complete */
4050 events[5] |= 0x10; /* Synchronous Connection Changed */
4051 }
4052
4053 if (lmp_sniffsubr_capable(hdev))
4054 events[5] |= 0x20; /* Sniff Subrating */
4055
4056 if (lmp_pause_enc_capable(hdev))
4057 events[5] |= 0x80; /* Encryption Key Refresh Complete */
4058
4059 if (lmp_ext_inq_capable(hdev))
4060 events[5] |= 0x40; /* Extended Inquiry Result */
4061
4062 if (lmp_no_flush_capable(hdev))
4063 events[7] |= 0x01; /* Enhanced Flush Complete */
4064
4065 if (lmp_lsto_capable(hdev))
4066 events[6] |= 0x80; /* Link Supervision Timeout Changed */
4067
4068 if (lmp_ssp_capable(hdev)) {
4069 events[6] |= 0x01; /* IO Capability Request */
4070 events[6] |= 0x02; /* IO Capability Response */
4071 events[6] |= 0x04; /* User Confirmation Request */
4072 events[6] |= 0x08; /* User Passkey Request */
4073 events[6] |= 0x10; /* Remote OOB Data Request */
4074 events[6] |= 0x20; /* Simple Pairing Complete */
4075 events[7] |= 0x04; /* User Passkey Notification */
4076 events[7] |= 0x08; /* Keypress Notification */
4077 events[7] |= 0x10; /* Remote Host Supported
4078 * Features Notification
4079 */
4080 }
4081
4082 if (lmp_le_capable(hdev))
4083 events[7] |= 0x20; /* LE Meta-Event */
4084
4085 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
4086 sizeof(events), events, HCI_CMD_TIMEOUT);
4087}
4088
4089static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
4090{
4091 struct hci_cp_read_stored_link_key cp;
4092
4093 if (!(hdev->commands[6] & 0x20) ||
4094 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
4095 return 0;
4096
4097 memset(&cp, 0, sizeof(cp));
4098 bacpy(&cp.bdaddr, BDADDR_ANY);
4099 cp.read_all = 0x01;
4100
4101 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
4102 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4103}
4104
4105static int hci_setup_link_policy_sync(struct hci_dev *hdev)
4106{
4107 struct hci_cp_write_def_link_policy cp;
4108 u16 link_policy = 0;
4109
4110 if (!(hdev->commands[5] & 0x10))
4111 return 0;
4112
4113 memset(&cp, 0, sizeof(cp));
4114
4115 if (lmp_rswitch_capable(hdev))
4116 link_policy |= HCI_LP_RSWITCH;
4117 if (lmp_hold_capable(hdev))
4118 link_policy |= HCI_LP_HOLD;
4119 if (lmp_sniff_capable(hdev))
4120 link_policy |= HCI_LP_SNIFF;
4121 if (lmp_park_capable(hdev))
4122 link_policy |= HCI_LP_PARK;
4123
4124 cp.policy = cpu_to_le16(link_policy);
4125
4126 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
4127 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4128}
4129
4130static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
4131{
4132 if (!(hdev->commands[8] & 0x01))
4133 return 0;
4134
4135 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
4136 0, NULL, HCI_CMD_TIMEOUT);
4137}
4138
4139static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
4140{
4141 if (!(hdev->commands[18] & 0x04) ||
4142 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4143 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
4144 return 0;
4145
4146 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4147 0, NULL, HCI_CMD_TIMEOUT);
4148}
4149
4150static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
4151{
4152 /* Some older Broadcom based Bluetooth 1.2 controllers do not
4153 * support the Read Page Scan Type command. Check support for
4154 * this command in the bit mask of supported commands.
4155 */
4156 if (!(hdev->commands[13] & 0x01))
4157 return 0;
4158
4159 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
4160 0, NULL, HCI_CMD_TIMEOUT);
4161}
4162
4163/* Read features beyond page 1 if available */
4164static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
4165{
4166 u8 page;
4167 int err;
4168
4169 if (!lmp_ext_feat_capable(hdev))
4170 return 0;
4171
4172 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
4173 page++) {
4174 err = hci_read_local_ext_features_sync(hdev, page);
4175 if (err)
4176 return err;
4177 }
4178
4179 return 0;
4180}
4181
4182/* HCI Controller init stage 3 command sequence */
4183static const struct hci_init_stage hci_init3[] = {
4184 /* HCI_OP_SET_EVENT_MASK */
4185 HCI_INIT(hci_set_event_mask_sync),
4186 /* HCI_OP_READ_STORED_LINK_KEY */
4187 HCI_INIT(hci_read_stored_link_key_sync),
4188 /* HCI_OP_WRITE_DEF_LINK_POLICY */
4189 HCI_INIT(hci_setup_link_policy_sync),
4190 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
4191 HCI_INIT(hci_read_page_scan_activity_sync),
4192 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
4193 HCI_INIT(hci_read_def_err_data_reporting_sync),
4194 /* HCI_OP_READ_PAGE_SCAN_TYPE */
4195 HCI_INIT(hci_read_page_scan_type_sync),
4196 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
4197 HCI_INIT(hci_read_local_ext_features_all_sync),
4198 {}
4199};
4200
4201static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
4202{
4203 u8 events[8];
4204
4205 if (!lmp_le_capable(hdev))
4206 return 0;
4207
4208 memset(events, 0, sizeof(events));
4209
4210 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
4211 events[0] |= 0x10; /* LE Long Term Key Request */
4212
4213 /* If controller supports the Connection Parameters Request
4214 * Link Layer Procedure, enable the corresponding event.
4215 */
4216 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
4217 /* LE Remote Connection Parameter Request */
4218 events[0] |= 0x20;
4219
4220 /* If the controller supports the Data Length Extension
4221 * feature, enable the corresponding event.
4222 */
4223 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
4224 events[0] |= 0x40; /* LE Data Length Change */
4225
4226 /* If the controller supports LL Privacy feature or LE Extended Adv,
4227 * enable the corresponding event.
4228 */
4229 if (use_enhanced_conn_complete(hdev))
4230 events[1] |= 0x02; /* LE Enhanced Connection Complete */
4231
4232 /* If the controller supports Extended Scanner Filter
4233 * Policies, enable the corresponding event.
4234 */
4235 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
4236 events[1] |= 0x04; /* LE Direct Advertising Report */
4237
4238 /* If the controller supports Channel Selection Algorithm #2
4239 * feature, enable the corresponding event.
4240 */
4241 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
4242 events[2] |= 0x08; /* LE Channel Selection Algorithm */
4243
4244 /* If the controller supports the LE Set Scan Enable command,
4245 * enable the corresponding advertising report event.
4246 */
4247 if (hdev->commands[26] & 0x08)
4248 events[0] |= 0x02; /* LE Advertising Report */
4249
4250 /* If the controller supports the LE Create Connection
4251 * command, enable the corresponding event.
4252 */
4253 if (hdev->commands[26] & 0x10)
4254 events[0] |= 0x01; /* LE Connection Complete */
4255
4256 /* If the controller supports the LE Connection Update
4257 * command, enable the corresponding event.
4258 */
4259 if (hdev->commands[27] & 0x04)
4260 events[0] |= 0x04; /* LE Connection Update Complete */
4261
4262 /* If the controller supports the LE Read Remote Used Features
4263 * command, enable the corresponding event.
4264 */
4265 if (hdev->commands[27] & 0x20)
4266 /* LE Read Remote Used Features Complete */
4267 events[0] |= 0x08;
4268
4269 /* If the controller supports the LE Read Local P-256
4270 * Public Key command, enable the corresponding event.
4271 */
4272 if (hdev->commands[34] & 0x02)
4273 /* LE Read Local P-256 Public Key Complete */
4274 events[0] |= 0x80;
4275
4276 /* If the controller supports the LE Generate DHKey
4277 * command, enable the corresponding event.
4278 */
4279 if (hdev->commands[34] & 0x04)
4280 events[1] |= 0x01; /* LE Generate DHKey Complete */
4281
4282 /* If the controller supports the LE Set Default PHY or
4283 * LE Set PHY commands, enable the corresponding event.
4284 */
4285 if (hdev->commands[35] & (0x20 | 0x40))
4286 events[1] |= 0x08; /* LE PHY Update Complete */
4287
4288 /* If the controller supports LE Set Extended Scan Parameters
4289 * and LE Set Extended Scan Enable commands, enable the
4290 * corresponding event.
4291 */
4292 if (use_ext_scan(hdev))
4293 events[1] |= 0x10; /* LE Extended Advertising Report */
4294
4295 /* If the controller supports the LE Extended Advertising
4296 * command, enable the corresponding event.
4297 */
4298 if (ext_adv_capable(hdev))
4299 events[2] |= 0x02; /* LE Advertising Set Terminated */
4300
4301 if (cis_capable(hdev)) {
4302 events[3] |= 0x01; /* LE CIS Established */
4303 if (cis_peripheral_capable(hdev))
4304 events[3] |= 0x02; /* LE CIS Request */
4305 }
4306
4307 if (bis_capable(hdev)) {
4308 events[1] |= 0x20; /* LE PA Report */
4309 events[1] |= 0x40; /* LE PA Sync Established */
4310 events[3] |= 0x04; /* LE Create BIG Complete */
4311 events[3] |= 0x08; /* LE Terminate BIG Complete */
4312 events[3] |= 0x10; /* LE BIG Sync Established */
4313 events[3] |= 0x20; /* LE BIG Sync Loss */
4314 events[4] |= 0x02; /* LE BIG Info Advertising Report */
4315 }
4316
4317 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
4318 sizeof(events), events, HCI_CMD_TIMEOUT);
4319}
4320
4321/* Read LE Advertising Channel TX Power */
4322static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
4323{
4324 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
4325 /* HCI TS spec forbids mixing of legacy and extended
4326 * advertising commands wherein READ_ADV_TX_POWER is
4327 * also included. So do not call it if extended adv
4328 * is supported otherwise controller will return
4329 * COMMAND_DISALLOWED for extended commands.
4330 */
4331 return __hci_cmd_sync_status(hdev,
4332 HCI_OP_LE_READ_ADV_TX_POWER,
4333 0, NULL, HCI_CMD_TIMEOUT);
4334 }
4335
4336 return 0;
4337}
4338
4339/* Read LE Min/Max Tx Power*/
4340static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
4341{
4342 if (!(hdev->commands[38] & 0x80) ||
4343 test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
4344 return 0;
4345
4346 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
4347 0, NULL, HCI_CMD_TIMEOUT);
4348}
4349
4350/* Read LE Accept List Size */
4351static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
4352{
4353 if (!(hdev->commands[26] & 0x40))
4354 return 0;
4355
4356 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4357 0, NULL, HCI_CMD_TIMEOUT);
4358}
4359
4360/* Read LE Resolving List Size */
4361static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
4362{
4363 if (!(hdev->commands[34] & 0x40))
4364 return 0;
4365
4366 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
4367 0, NULL, HCI_CMD_TIMEOUT);
4368}
4369
4370/* Clear LE Resolving List */
4371static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
4372{
4373 if (!(hdev->commands[34] & 0x20))
4374 return 0;
4375
4376 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
4377 HCI_CMD_TIMEOUT);
4378}
4379
4380/* Set RPA timeout */
4381static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
4382{
4383 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
4384
4385 if (!(hdev->commands[35] & 0x04) ||
4386 test_bit(HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT, &hdev->quirks))
4387 return 0;
4388
4389 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
4390 sizeof(timeout), &timeout,
4391 HCI_CMD_TIMEOUT);
4392}
4393
4394/* Read LE Maximum Data Length */
4395static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
4396{
4397 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4398 return 0;
4399
4400 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
4401 HCI_CMD_TIMEOUT);
4402}
4403
4404/* Read LE Suggested Default Data Length */
4405static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
4406{
4407 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4408 return 0;
4409
4410 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
4411 HCI_CMD_TIMEOUT);
4412}
4413
4414/* Read LE Number of Supported Advertising Sets */
4415static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
4416{
4417 if (!ext_adv_capable(hdev))
4418 return 0;
4419
4420 return __hci_cmd_sync_status(hdev,
4421 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4422 0, NULL, HCI_CMD_TIMEOUT);
4423}
4424
4425/* Write LE Host Supported */
4426static int hci_set_le_support_sync(struct hci_dev *hdev)
4427{
4428 struct hci_cp_write_le_host_supported cp;
4429
4430 /* LE-only devices do not support explicit enablement */
4431 if (!lmp_bredr_capable(hdev))
4432 return 0;
4433
4434 memset(&cp, 0, sizeof(cp));
4435
4436 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
4437 cp.le = 0x01;
4438 cp.simul = 0x00;
4439 }
4440
4441 if (cp.le == lmp_host_le_capable(hdev))
4442 return 0;
4443
4444 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
4445 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4446}
4447
4448/* LE Set Host Feature */
4449static int hci_le_set_host_feature_sync(struct hci_dev *hdev)
4450{
4451 struct hci_cp_le_set_host_feature cp;
4452
4453 if (!cis_capable(hdev))
4454 return 0;
4455
4456 memset(&cp, 0, sizeof(cp));
4457
4458 /* Connected Isochronous Channels (Host Support) */
4459 cp.bit_number = 32;
4460 cp.bit_value = 1;
4461
4462 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE,
4463 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4464}
4465
4466/* LE Controller init stage 3 command sequence */
4467static const struct hci_init_stage le_init3[] = {
4468 /* HCI_OP_LE_SET_EVENT_MASK */
4469 HCI_INIT(hci_le_set_event_mask_sync),
4470 /* HCI_OP_LE_READ_ADV_TX_POWER */
4471 HCI_INIT(hci_le_read_adv_tx_power_sync),
4472 /* HCI_OP_LE_READ_TRANSMIT_POWER */
4473 HCI_INIT(hci_le_read_tx_power_sync),
4474 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
4475 HCI_INIT(hci_le_read_accept_list_size_sync),
4476 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
4477 HCI_INIT(hci_le_clear_accept_list_sync),
4478 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
4479 HCI_INIT(hci_le_read_resolv_list_size_sync),
4480 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
4481 HCI_INIT(hci_le_clear_resolv_list_sync),
4482 /* HCI_OP_LE_SET_RPA_TIMEOUT */
4483 HCI_INIT(hci_le_set_rpa_timeout_sync),
4484 /* HCI_OP_LE_READ_MAX_DATA_LEN */
4485 HCI_INIT(hci_le_read_max_data_len_sync),
4486 /* HCI_OP_LE_READ_DEF_DATA_LEN */
4487 HCI_INIT(hci_le_read_def_data_len_sync),
4488 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
4489 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
4490 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
4491 HCI_INIT(hci_set_le_support_sync),
4492 /* HCI_OP_LE_SET_HOST_FEATURE */
4493 HCI_INIT(hci_le_set_host_feature_sync),
4494 {}
4495};
4496
4497static int hci_init3_sync(struct hci_dev *hdev)
4498{
4499 int err;
4500
4501 bt_dev_dbg(hdev, "");
4502
4503 err = hci_init_stage_sync(hdev, hci_init3);
4504 if (err)
4505 return err;
4506
4507 if (lmp_le_capable(hdev))
4508 return hci_init_stage_sync(hdev, le_init3);
4509
4510 return 0;
4511}
4512
4513static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
4514{
4515 struct hci_cp_delete_stored_link_key cp;
4516
4517 /* Some Broadcom based Bluetooth controllers do not support the
4518 * Delete Stored Link Key command. They are clearly indicating its
4519 * absence in the bit mask of supported commands.
4520 *
4521 * Check the supported commands and only if the command is marked
4522 * as supported send it. If not supported assume that the controller
4523 * does not have actual support for stored link keys which makes this
4524 * command redundant anyway.
4525 *
4526 * Some controllers indicate that they support handling deleting
4527 * stored link keys, but they don't. The quirk lets a driver
4528 * just disable this command.
4529 */
4530 if (!(hdev->commands[6] & 0x80) ||
4531 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
4532 return 0;
4533
4534 memset(&cp, 0, sizeof(cp));
4535 bacpy(&cp.bdaddr, BDADDR_ANY);
4536 cp.delete_all = 0x01;
4537
4538 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
4539 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4540}
4541
4542static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
4543{
4544 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
4545 bool changed = false;
4546
4547 /* Set event mask page 2 if the HCI command for it is supported */
4548 if (!(hdev->commands[22] & 0x04))
4549 return 0;
4550
4551 /* If Connectionless Peripheral Broadcast central role is supported
4552 * enable all necessary events for it.
4553 */
4554 if (lmp_cpb_central_capable(hdev)) {
4555 events[1] |= 0x40; /* Triggered Clock Capture */
4556 events[1] |= 0x80; /* Synchronization Train Complete */
4557 events[2] |= 0x08; /* Truncated Page Complete */
4558 events[2] |= 0x20; /* CPB Channel Map Change */
4559 changed = true;
4560 }
4561
4562 /* If Connectionless Peripheral Broadcast peripheral role is supported
4563 * enable all necessary events for it.
4564 */
4565 if (lmp_cpb_peripheral_capable(hdev)) {
4566 events[2] |= 0x01; /* Synchronization Train Received */
4567 events[2] |= 0x02; /* CPB Receive */
4568 events[2] |= 0x04; /* CPB Timeout */
4569 events[2] |= 0x10; /* Peripheral Page Response Timeout */
4570 changed = true;
4571 }
4572
4573 /* Enable Authenticated Payload Timeout Expired event if supported */
4574 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
4575 events[2] |= 0x80;
4576 changed = true;
4577 }
4578
4579 /* Some Broadcom based controllers indicate support for Set Event
4580 * Mask Page 2 command, but then actually do not support it. Since
4581 * the default value is all bits set to zero, the command is only
4582 * required if the event mask has to be changed. In case no change
4583 * to the event mask is needed, skip this command.
4584 */
4585 if (!changed)
4586 return 0;
4587
4588 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
4589 sizeof(events), events, HCI_CMD_TIMEOUT);
4590}
4591
4592/* Read local codec list if the HCI command is supported */
4593static int hci_read_local_codecs_sync(struct hci_dev *hdev)
4594{
4595 if (hdev->commands[45] & 0x04)
4596 hci_read_supported_codecs_v2(hdev);
4597 else if (hdev->commands[29] & 0x20)
4598 hci_read_supported_codecs(hdev);
4599
4600 return 0;
4601}
4602
4603/* Read local pairing options if the HCI command is supported */
4604static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
4605{
4606 if (!(hdev->commands[41] & 0x08))
4607 return 0;
4608
4609 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
4610 0, NULL, HCI_CMD_TIMEOUT);
4611}
4612
4613/* Get MWS transport configuration if the HCI command is supported */
4614static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
4615{
4616 if (!mws_transport_config_capable(hdev))
4617 return 0;
4618
4619 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
4620 0, NULL, HCI_CMD_TIMEOUT);
4621}
4622
4623/* Check for Synchronization Train support */
4624static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
4625{
4626 if (!lmp_sync_train_capable(hdev))
4627 return 0;
4628
4629 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
4630 0, NULL, HCI_CMD_TIMEOUT);
4631}
4632
4633/* Enable Secure Connections if supported and configured */
4634static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
4635{
4636 u8 support = 0x01;
4637
4638 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
4639 !bredr_sc_enabled(hdev))
4640 return 0;
4641
4642 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
4643 sizeof(support), &support,
4644 HCI_CMD_TIMEOUT);
4645}
4646
4647/* Set erroneous data reporting if supported to the wideband speech
4648 * setting value
4649 */
4650static int hci_set_err_data_report_sync(struct hci_dev *hdev)
4651{
4652 struct hci_cp_write_def_err_data_reporting cp;
4653 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
4654
4655 if (!(hdev->commands[18] & 0x08) ||
4656 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4657 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
4658 return 0;
4659
4660 if (enabled == hdev->err_data_reporting)
4661 return 0;
4662
4663 memset(&cp, 0, sizeof(cp));
4664 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
4665 ERR_DATA_REPORTING_DISABLED;
4666
4667 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4668 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4669}
4670
4671static const struct hci_init_stage hci_init4[] = {
4672 /* HCI_OP_DELETE_STORED_LINK_KEY */
4673 HCI_INIT(hci_delete_stored_link_key_sync),
4674 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
4675 HCI_INIT(hci_set_event_mask_page_2_sync),
4676 /* HCI_OP_READ_LOCAL_CODECS */
4677 HCI_INIT(hci_read_local_codecs_sync),
4678 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
4679 HCI_INIT(hci_read_local_pairing_opts_sync),
4680 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
4681 HCI_INIT(hci_get_mws_transport_config_sync),
4682 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
4683 HCI_INIT(hci_read_sync_train_params_sync),
4684 /* HCI_OP_WRITE_SC_SUPPORT */
4685 HCI_INIT(hci_write_sc_support_1_sync),
4686 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
4687 HCI_INIT(hci_set_err_data_report_sync),
4688 {}
4689};
4690
4691/* Set Suggested Default Data Length to maximum if supported */
4692static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
4693{
4694 struct hci_cp_le_write_def_data_len cp;
4695
4696 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4697 return 0;
4698
4699 memset(&cp, 0, sizeof(cp));
4700 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
4701 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
4702
4703 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
4704 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4705}
4706
4707/* Set Default PHY parameters if command is supported, enables all supported
4708 * PHYs according to the LE Features bits.
4709 */
4710static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
4711{
4712 struct hci_cp_le_set_default_phy cp;
4713
4714 if (!(hdev->commands[35] & 0x20)) {
4715 /* If the command is not supported it means only 1M PHY is
4716 * supported.
4717 */
4718 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
4719 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
4720 return 0;
4721 }
4722
4723 memset(&cp, 0, sizeof(cp));
4724 cp.all_phys = 0x00;
4725 cp.tx_phys = HCI_LE_SET_PHY_1M;
4726 cp.rx_phys = HCI_LE_SET_PHY_1M;
4727
4728 /* Enables 2M PHY if supported */
4729 if (le_2m_capable(hdev)) {
4730 cp.tx_phys |= HCI_LE_SET_PHY_2M;
4731 cp.rx_phys |= HCI_LE_SET_PHY_2M;
4732 }
4733
4734 /* Enables Coded PHY if supported */
4735 if (le_coded_capable(hdev)) {
4736 cp.tx_phys |= HCI_LE_SET_PHY_CODED;
4737 cp.rx_phys |= HCI_LE_SET_PHY_CODED;
4738 }
4739
4740 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
4741 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4742}
4743
4744static const struct hci_init_stage le_init4[] = {
4745 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
4746 HCI_INIT(hci_le_set_write_def_data_len_sync),
4747 /* HCI_OP_LE_SET_DEFAULT_PHY */
4748 HCI_INIT(hci_le_set_default_phy_sync),
4749 {}
4750};
4751
4752static int hci_init4_sync(struct hci_dev *hdev)
4753{
4754 int err;
4755
4756 bt_dev_dbg(hdev, "");
4757
4758 err = hci_init_stage_sync(hdev, hci_init4);
4759 if (err)
4760 return err;
4761
4762 if (lmp_le_capable(hdev))
4763 return hci_init_stage_sync(hdev, le_init4);
4764
4765 return 0;
4766}
4767
4768static int hci_init_sync(struct hci_dev *hdev)
4769{
4770 int err;
4771
4772 err = hci_init1_sync(hdev);
4773 if (err < 0)
4774 return err;
4775
4776 if (hci_dev_test_flag(hdev, HCI_SETUP))
4777 hci_debugfs_create_basic(hdev);
4778
4779 err = hci_init2_sync(hdev);
4780 if (err < 0)
4781 return err;
4782
4783 err = hci_init3_sync(hdev);
4784 if (err < 0)
4785 return err;
4786
4787 err = hci_init4_sync(hdev);
4788 if (err < 0)
4789 return err;
4790
4791 /* This function is only called when the controller is actually in
4792 * configured state. When the controller is marked as unconfigured,
4793 * this initialization procedure is not run.
4794 *
4795 * It means that it is possible that a controller runs through its
4796 * setup phase and then discovers missing settings. If that is the
4797 * case, then this function will not be called. It then will only
4798 * be called during the config phase.
4799 *
4800 * So only when in setup phase or config phase, create the debugfs
4801 * entries and register the SMP channels.
4802 */
4803 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4804 !hci_dev_test_flag(hdev, HCI_CONFIG))
4805 return 0;
4806
4807 if (hci_dev_test_and_set_flag(hdev, HCI_DEBUGFS_CREATED))
4808 return 0;
4809
4810 hci_debugfs_create_common(hdev);
4811
4812 if (lmp_bredr_capable(hdev))
4813 hci_debugfs_create_bredr(hdev);
4814
4815 if (lmp_le_capable(hdev))
4816 hci_debugfs_create_le(hdev);
4817
4818 return 0;
4819}
4820
4821#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
4822
4823static const struct {
4824 unsigned long quirk;
4825 const char *desc;
4826} hci_broken_table[] = {
4827 HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
4828 "HCI Read Local Supported Commands not supported"),
4829 HCI_QUIRK_BROKEN(STORED_LINK_KEY,
4830 "HCI Delete Stored Link Key command is advertised, "
4831 "but not supported."),
4832 HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
4833 "HCI Read Default Erroneous Data Reporting command is "
4834 "advertised, but not supported."),
4835 HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
4836 "HCI Read Transmit Power Level command is advertised, "
4837 "but not supported."),
4838 HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
4839 "HCI Set Event Filter command not supported."),
4840 HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
4841 "HCI Enhanced Setup Synchronous Connection command is "
4842 "advertised, but not supported."),
4843 HCI_QUIRK_BROKEN(SET_RPA_TIMEOUT,
4844 "HCI LE Set Random Private Address Timeout command is "
4845 "advertised, but not supported."),
4846 HCI_QUIRK_BROKEN(EXT_CREATE_CONN,
4847 "HCI LE Extended Create Connection command is "
4848 "advertised, but not supported."),
4849 HCI_QUIRK_BROKEN(WRITE_AUTH_PAYLOAD_TIMEOUT,
4850 "HCI WRITE AUTH PAYLOAD TIMEOUT command leads "
4851 "to unexpected SMP errors when pairing "
4852 "and will not be used."),
4853 HCI_QUIRK_BROKEN(LE_CODED,
4854 "HCI LE Coded PHY feature bit is set, "
4855 "but its usage is not supported.")
4856};
4857
4858/* This function handles hdev setup stage:
4859 *
4860 * Calls hdev->setup
4861 * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set.
4862 */
4863static int hci_dev_setup_sync(struct hci_dev *hdev)
4864{
4865 int ret = 0;
4866 bool invalid_bdaddr;
4867 size_t i;
4868
4869 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4870 !test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks))
4871 return 0;
4872
4873 bt_dev_dbg(hdev, "");
4874
4875 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
4876
4877 if (hdev->setup)
4878 ret = hdev->setup(hdev);
4879
4880 for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
4881 if (test_bit(hci_broken_table[i].quirk, &hdev->quirks))
4882 bt_dev_warn(hdev, "%s", hci_broken_table[i].desc);
4883 }
4884
4885 /* The transport driver can set the quirk to mark the
4886 * BD_ADDR invalid before creating the HCI device or in
4887 * its setup callback.
4888 */
4889 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
4890 test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
4891 if (!ret) {
4892 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks) &&
4893 !bacmp(&hdev->public_addr, BDADDR_ANY))
4894 hci_dev_get_bd_addr_from_property(hdev);
4895
4896 if (invalid_bdaddr && bacmp(&hdev->public_addr, BDADDR_ANY) &&
4897 hdev->set_bdaddr) {
4898 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4899 if (!ret)
4900 invalid_bdaddr = false;
4901 }
4902 }
4903
4904 /* The transport driver can set these quirks before
4905 * creating the HCI device or in its setup callback.
4906 *
4907 * For the invalid BD_ADDR quirk it is possible that
4908 * it becomes a valid address if the bootloader does
4909 * provide it (see above).
4910 *
4911 * In case any of them is set, the controller has to
4912 * start up as unconfigured.
4913 */
4914 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
4915 invalid_bdaddr)
4916 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
4917
4918 /* For an unconfigured controller it is required to
4919 * read at least the version information provided by
4920 * the Read Local Version Information command.
4921 *
4922 * If the set_bdaddr driver callback is provided, then
4923 * also the original Bluetooth public device address
4924 * will be read using the Read BD Address command.
4925 */
4926 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4927 return hci_unconf_init_sync(hdev);
4928
4929 return ret;
4930}
4931
4932/* This function handles hdev init stage:
4933 *
4934 * Calls hci_dev_setup_sync to perform setup stage
4935 * Calls hci_init_sync to perform HCI command init sequence
4936 */
4937static int hci_dev_init_sync(struct hci_dev *hdev)
4938{
4939 int ret;
4940
4941 bt_dev_dbg(hdev, "");
4942
4943 atomic_set(&hdev->cmd_cnt, 1);
4944 set_bit(HCI_INIT, &hdev->flags);
4945
4946 ret = hci_dev_setup_sync(hdev);
4947
4948 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
4949 /* If public address change is configured, ensure that
4950 * the address gets programmed. If the driver does not
4951 * support changing the public address, fail the power
4952 * on procedure.
4953 */
4954 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
4955 hdev->set_bdaddr)
4956 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4957 else
4958 ret = -EADDRNOTAVAIL;
4959 }
4960
4961 if (!ret) {
4962 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4963 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4964 ret = hci_init_sync(hdev);
4965 if (!ret && hdev->post_init)
4966 ret = hdev->post_init(hdev);
4967 }
4968 }
4969
4970 /* If the HCI Reset command is clearing all diagnostic settings,
4971 * then they need to be reprogrammed after the init procedure
4972 * completed.
4973 */
4974 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
4975 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4976 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
4977 ret = hdev->set_diag(hdev, true);
4978
4979 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4980 msft_do_open(hdev);
4981 aosp_do_open(hdev);
4982 }
4983
4984 clear_bit(HCI_INIT, &hdev->flags);
4985
4986 return ret;
4987}
4988
4989int hci_dev_open_sync(struct hci_dev *hdev)
4990{
4991 int ret;
4992
4993 bt_dev_dbg(hdev, "");
4994
4995 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
4996 ret = -ENODEV;
4997 goto done;
4998 }
4999
5000 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
5001 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
5002 /* Check for rfkill but allow the HCI setup stage to
5003 * proceed (which in itself doesn't cause any RF activity).
5004 */
5005 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
5006 ret = -ERFKILL;
5007 goto done;
5008 }
5009
5010 /* Check for valid public address or a configured static
5011 * random address, but let the HCI setup proceed to
5012 * be able to determine if there is a public address
5013 * or not.
5014 *
5015 * In case of user channel usage, it is not important
5016 * if a public address or static random address is
5017 * available.
5018 */
5019 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5020 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
5021 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
5022 ret = -EADDRNOTAVAIL;
5023 goto done;
5024 }
5025 }
5026
5027 if (test_bit(HCI_UP, &hdev->flags)) {
5028 ret = -EALREADY;
5029 goto done;
5030 }
5031
5032 if (hdev->open(hdev)) {
5033 ret = -EIO;
5034 goto done;
5035 }
5036
5037 hci_devcd_reset(hdev);
5038
5039 set_bit(HCI_RUNNING, &hdev->flags);
5040 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
5041
5042 ret = hci_dev_init_sync(hdev);
5043 if (!ret) {
5044 hci_dev_hold(hdev);
5045 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
5046 hci_adv_instances_set_rpa_expired(hdev, true);
5047 set_bit(HCI_UP, &hdev->flags);
5048 hci_sock_dev_event(hdev, HCI_DEV_UP);
5049 hci_leds_update_powered(hdev, true);
5050 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
5051 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
5052 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
5053 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5054 hci_dev_test_flag(hdev, HCI_MGMT)) {
5055 ret = hci_powered_update_sync(hdev);
5056 mgmt_power_on(hdev, ret);
5057 }
5058 } else {
5059 /* Init failed, cleanup */
5060 flush_work(&hdev->tx_work);
5061
5062 /* Since hci_rx_work() is possible to awake new cmd_work
5063 * it should be flushed first to avoid unexpected call of
5064 * hci_cmd_work()
5065 */
5066 flush_work(&hdev->rx_work);
5067 flush_work(&hdev->cmd_work);
5068
5069 skb_queue_purge(&hdev->cmd_q);
5070 skb_queue_purge(&hdev->rx_q);
5071
5072 if (hdev->flush)
5073 hdev->flush(hdev);
5074
5075 if (hdev->sent_cmd) {
5076 cancel_delayed_work_sync(&hdev->cmd_timer);
5077 kfree_skb(hdev->sent_cmd);
5078 hdev->sent_cmd = NULL;
5079 }
5080
5081 if (hdev->req_skb) {
5082 kfree_skb(hdev->req_skb);
5083 hdev->req_skb = NULL;
5084 }
5085
5086 clear_bit(HCI_RUNNING, &hdev->flags);
5087 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
5088
5089 hdev->close(hdev);
5090 hdev->flags &= BIT(HCI_RAW);
5091 }
5092
5093done:
5094 return ret;
5095}
5096
5097/* This function requires the caller holds hdev->lock */
5098static void hci_pend_le_actions_clear(struct hci_dev *hdev)
5099{
5100 struct hci_conn_params *p;
5101
5102 list_for_each_entry(p, &hdev->le_conn_params, list) {
5103 hci_pend_le_list_del_init(p);
5104 if (p->conn) {
5105 hci_conn_drop(p->conn);
5106 hci_conn_put(p->conn);
5107 p->conn = NULL;
5108 }
5109 }
5110
5111 BT_DBG("All LE pending actions cleared");
5112}
5113
5114static int hci_dev_shutdown(struct hci_dev *hdev)
5115{
5116 int err = 0;
5117 /* Similar to how we first do setup and then set the exclusive access
5118 * bit for userspace, we must first unset userchannel and then clean up.
5119 * Otherwise, the kernel can't properly use the hci channel to clean up
5120 * the controller (some shutdown routines require sending additional
5121 * commands to the controller for example).
5122 */
5123 bool was_userchannel =
5124 hci_dev_test_and_clear_flag(hdev, HCI_USER_CHANNEL);
5125
5126 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
5127 test_bit(HCI_UP, &hdev->flags)) {
5128 /* Execute vendor specific shutdown routine */
5129 if (hdev->shutdown)
5130 err = hdev->shutdown(hdev);
5131 }
5132
5133 if (was_userchannel)
5134 hci_dev_set_flag(hdev, HCI_USER_CHANNEL);
5135
5136 return err;
5137}
5138
5139int hci_dev_close_sync(struct hci_dev *hdev)
5140{
5141 bool auto_off;
5142 int err = 0;
5143
5144 bt_dev_dbg(hdev, "");
5145
5146 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
5147 disable_delayed_work(&hdev->power_off);
5148 disable_delayed_work(&hdev->ncmd_timer);
5149 disable_delayed_work(&hdev->le_scan_disable);
5150 } else {
5151 cancel_delayed_work(&hdev->power_off);
5152 cancel_delayed_work(&hdev->ncmd_timer);
5153 cancel_delayed_work(&hdev->le_scan_disable);
5154 }
5155
5156 hci_cmd_sync_cancel_sync(hdev, ENODEV);
5157
5158 cancel_interleave_scan(hdev);
5159
5160 if (hdev->adv_instance_timeout) {
5161 cancel_delayed_work_sync(&hdev->adv_instance_expire);
5162 hdev->adv_instance_timeout = 0;
5163 }
5164
5165 err = hci_dev_shutdown(hdev);
5166
5167 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
5168 cancel_delayed_work_sync(&hdev->cmd_timer);
5169 return err;
5170 }
5171
5172 hci_leds_update_powered(hdev, false);
5173
5174 /* Flush RX and TX works */
5175 flush_work(&hdev->tx_work);
5176 flush_work(&hdev->rx_work);
5177
5178 if (hdev->discov_timeout > 0) {
5179 hdev->discov_timeout = 0;
5180 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
5181 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
5182 }
5183
5184 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
5185 cancel_delayed_work(&hdev->service_cache);
5186
5187 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
5188 struct adv_info *adv_instance;
5189
5190 cancel_delayed_work_sync(&hdev->rpa_expired);
5191
5192 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
5193 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
5194 }
5195
5196 /* Avoid potential lockdep warnings from the *_flush() calls by
5197 * ensuring the workqueue is empty up front.
5198 */
5199 drain_workqueue(hdev->workqueue);
5200
5201 hci_dev_lock(hdev);
5202
5203 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
5204
5205 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
5206
5207 if (!auto_off && !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5208 hci_dev_test_flag(hdev, HCI_MGMT))
5209 __mgmt_power_off(hdev);
5210
5211 hci_inquiry_cache_flush(hdev);
5212 hci_pend_le_actions_clear(hdev);
5213 hci_conn_hash_flush(hdev);
5214 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
5215 smp_unregister(hdev);
5216 hci_dev_unlock(hdev);
5217
5218 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
5219
5220 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5221 aosp_do_close(hdev);
5222 msft_do_close(hdev);
5223 }
5224
5225 if (hdev->flush)
5226 hdev->flush(hdev);
5227
5228 /* Reset device */
5229 skb_queue_purge(&hdev->cmd_q);
5230 atomic_set(&hdev->cmd_cnt, 1);
5231 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
5232 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
5233 set_bit(HCI_INIT, &hdev->flags);
5234 hci_reset_sync(hdev);
5235 clear_bit(HCI_INIT, &hdev->flags);
5236 }
5237
5238 /* flush cmd work */
5239 flush_work(&hdev->cmd_work);
5240
5241 /* Drop queues */
5242 skb_queue_purge(&hdev->rx_q);
5243 skb_queue_purge(&hdev->cmd_q);
5244 skb_queue_purge(&hdev->raw_q);
5245
5246 /* Drop last sent command */
5247 if (hdev->sent_cmd) {
5248 cancel_delayed_work_sync(&hdev->cmd_timer);
5249 kfree_skb(hdev->sent_cmd);
5250 hdev->sent_cmd = NULL;
5251 }
5252
5253 /* Drop last request */
5254 if (hdev->req_skb) {
5255 kfree_skb(hdev->req_skb);
5256 hdev->req_skb = NULL;
5257 }
5258
5259 clear_bit(HCI_RUNNING, &hdev->flags);
5260 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
5261
5262 /* After this point our queues are empty and no tasks are scheduled. */
5263 hdev->close(hdev);
5264
5265 /* Clear flags */
5266 hdev->flags &= BIT(HCI_RAW);
5267 hci_dev_clear_volatile_flags(hdev);
5268
5269 memset(hdev->eir, 0, sizeof(hdev->eir));
5270 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
5271 bacpy(&hdev->random_addr, BDADDR_ANY);
5272 hci_codec_list_clear(&hdev->local_codecs);
5273
5274 hci_dev_put(hdev);
5275 return err;
5276}
5277
5278/* This function perform power on HCI command sequence as follows:
5279 *
5280 * If controller is already up (HCI_UP) performs hci_powered_update_sync
5281 * sequence otherwise run hci_dev_open_sync which will follow with
5282 * hci_powered_update_sync after the init sequence is completed.
5283 */
5284static int hci_power_on_sync(struct hci_dev *hdev)
5285{
5286 int err;
5287
5288 if (test_bit(HCI_UP, &hdev->flags) &&
5289 hci_dev_test_flag(hdev, HCI_MGMT) &&
5290 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
5291 cancel_delayed_work(&hdev->power_off);
5292 return hci_powered_update_sync(hdev);
5293 }
5294
5295 err = hci_dev_open_sync(hdev);
5296 if (err < 0)
5297 return err;
5298
5299 /* During the HCI setup phase, a few error conditions are
5300 * ignored and they need to be checked now. If they are still
5301 * valid, it is important to return the device back off.
5302 */
5303 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
5304 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
5305 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
5306 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
5307 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
5308 hci_dev_close_sync(hdev);
5309 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
5310 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
5311 HCI_AUTO_OFF_TIMEOUT);
5312 }
5313
5314 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
5315 /* For unconfigured devices, set the HCI_RAW flag
5316 * so that userspace can easily identify them.
5317 */
5318 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5319 set_bit(HCI_RAW, &hdev->flags);
5320
5321 /* For fully configured devices, this will send
5322 * the Index Added event. For unconfigured devices,
5323 * it will send Unconfigued Index Added event.
5324 *
5325 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
5326 * and no event will be send.
5327 */
5328 mgmt_index_added(hdev);
5329 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
5330 /* When the controller is now configured, then it
5331 * is important to clear the HCI_RAW flag.
5332 */
5333 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5334 clear_bit(HCI_RAW, &hdev->flags);
5335
5336 /* Powering on the controller with HCI_CONFIG set only
5337 * happens with the transition from unconfigured to
5338 * configured. This will send the Index Added event.
5339 */
5340 mgmt_index_added(hdev);
5341 }
5342
5343 return 0;
5344}
5345
5346static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
5347{
5348 struct hci_cp_remote_name_req_cancel cp;
5349
5350 memset(&cp, 0, sizeof(cp));
5351 bacpy(&cp.bdaddr, addr);
5352
5353 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
5354 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5355}
5356
5357int hci_stop_discovery_sync(struct hci_dev *hdev)
5358{
5359 struct discovery_state *d = &hdev->discovery;
5360 struct inquiry_entry *e;
5361 int err;
5362
5363 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
5364
5365 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
5366 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
5367 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
5368 0, NULL, HCI_CMD_TIMEOUT);
5369 if (err)
5370 return err;
5371 }
5372
5373 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5374 cancel_delayed_work(&hdev->le_scan_disable);
5375
5376 err = hci_scan_disable_sync(hdev);
5377 if (err)
5378 return err;
5379 }
5380
5381 } else {
5382 err = hci_scan_disable_sync(hdev);
5383 if (err)
5384 return err;
5385 }
5386
5387 /* Resume advertising if it was paused */
5388 if (use_ll_privacy(hdev))
5389 hci_resume_advertising_sync(hdev);
5390
5391 /* No further actions needed for LE-only discovery */
5392 if (d->type == DISCOV_TYPE_LE)
5393 return 0;
5394
5395 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
5396 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
5397 NAME_PENDING);
5398 if (!e)
5399 return 0;
5400
5401 /* Ignore cancel errors since it should interfere with stopping
5402 * of the discovery.
5403 */
5404 hci_remote_name_cancel_sync(hdev, &e->data.bdaddr);
5405 }
5406
5407 return 0;
5408}
5409
5410static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
5411 u8 reason)
5412{
5413 struct hci_cp_disconnect cp;
5414
5415 if (test_bit(HCI_CONN_BIG_CREATED, &conn->flags)) {
5416 /* This is a BIS connection, hci_conn_del will
5417 * do the necessary cleanup.
5418 */
5419 hci_dev_lock(hdev);
5420 hci_conn_failed(conn, reason);
5421 hci_dev_unlock(hdev);
5422
5423 return 0;
5424 }
5425
5426 memset(&cp, 0, sizeof(cp));
5427 cp.handle = cpu_to_le16(conn->handle);
5428 cp.reason = reason;
5429
5430 /* Wait for HCI_EV_DISCONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5431 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5432 * used when suspending or powering off, where we don't want to wait
5433 * for the peer's response.
5434 */
5435 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5436 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
5437 sizeof(cp), &cp,
5438 HCI_EV_DISCONN_COMPLETE,
5439 HCI_CMD_TIMEOUT, NULL);
5440
5441 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
5442 HCI_CMD_TIMEOUT);
5443}
5444
5445static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
5446 struct hci_conn *conn, u8 reason)
5447{
5448 /* Return reason if scanning since the connection shall probably be
5449 * cleanup directly.
5450 */
5451 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
5452 return reason;
5453
5454 if (conn->role == HCI_ROLE_SLAVE ||
5455 test_and_set_bit(HCI_CONN_CANCEL, &conn->flags))
5456 return 0;
5457
5458 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
5459 0, NULL, HCI_CMD_TIMEOUT);
5460}
5461
5462static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn,
5463 u8 reason)
5464{
5465 if (conn->type == LE_LINK)
5466 return hci_le_connect_cancel_sync(hdev, conn, reason);
5467
5468 if (conn->type == ISO_LINK) {
5469 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
5470 * page 1857:
5471 *
5472 * If this command is issued for a CIS on the Central and the
5473 * CIS is successfully terminated before being established,
5474 * then an HCI_LE_CIS_Established event shall also be sent for
5475 * this CIS with the Status Operation Cancelled by Host (0x44).
5476 */
5477 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
5478 return hci_disconnect_sync(hdev, conn, reason);
5479
5480 /* CIS with no Create CIS sent have nothing to cancel */
5481 if (bacmp(&conn->dst, BDADDR_ANY))
5482 return HCI_ERROR_LOCAL_HOST_TERM;
5483
5484 /* There is no way to cancel a BIS without terminating the BIG
5485 * which is done later on connection cleanup.
5486 */
5487 return 0;
5488 }
5489
5490 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
5491 return 0;
5492
5493 /* Wait for HCI_EV_CONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5494 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5495 * used when suspending or powering off, where we don't want to wait
5496 * for the peer's response.
5497 */
5498 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5499 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN_CANCEL,
5500 6, &conn->dst,
5501 HCI_EV_CONN_COMPLETE,
5502 HCI_CMD_TIMEOUT, NULL);
5503
5504 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
5505 6, &conn->dst, HCI_CMD_TIMEOUT);
5506}
5507
5508static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
5509 u8 reason)
5510{
5511 struct hci_cp_reject_sync_conn_req cp;
5512
5513 memset(&cp, 0, sizeof(cp));
5514 bacpy(&cp.bdaddr, &conn->dst);
5515 cp.reason = reason;
5516
5517 /* SCO rejection has its own limited set of
5518 * allowed error values (0x0D-0x0F).
5519 */
5520 if (reason < 0x0d || reason > 0x0f)
5521 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
5522
5523 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
5524 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5525}
5526
5527static int hci_le_reject_cis_sync(struct hci_dev *hdev, struct hci_conn *conn,
5528 u8 reason)
5529{
5530 struct hci_cp_le_reject_cis cp;
5531
5532 memset(&cp, 0, sizeof(cp));
5533 cp.handle = cpu_to_le16(conn->handle);
5534 cp.reason = reason;
5535
5536 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REJECT_CIS,
5537 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5538}
5539
5540static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
5541 u8 reason)
5542{
5543 struct hci_cp_reject_conn_req cp;
5544
5545 if (conn->type == ISO_LINK)
5546 return hci_le_reject_cis_sync(hdev, conn, reason);
5547
5548 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
5549 return hci_reject_sco_sync(hdev, conn, reason);
5550
5551 memset(&cp, 0, sizeof(cp));
5552 bacpy(&cp.bdaddr, &conn->dst);
5553 cp.reason = reason;
5554
5555 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
5556 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5557}
5558
5559int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
5560{
5561 int err = 0;
5562 u16 handle = conn->handle;
5563 bool disconnect = false;
5564 struct hci_conn *c;
5565
5566 switch (conn->state) {
5567 case BT_CONNECTED:
5568 case BT_CONFIG:
5569 err = hci_disconnect_sync(hdev, conn, reason);
5570 break;
5571 case BT_CONNECT:
5572 err = hci_connect_cancel_sync(hdev, conn, reason);
5573 break;
5574 case BT_CONNECT2:
5575 err = hci_reject_conn_sync(hdev, conn, reason);
5576 break;
5577 case BT_OPEN:
5578 case BT_BOUND:
5579 break;
5580 default:
5581 disconnect = true;
5582 break;
5583 }
5584
5585 hci_dev_lock(hdev);
5586
5587 /* Check if the connection has been cleaned up concurrently */
5588 c = hci_conn_hash_lookup_handle(hdev, handle);
5589 if (!c || c != conn) {
5590 err = 0;
5591 goto unlock;
5592 }
5593
5594 /* Cleanup hci_conn object if it cannot be cancelled as it
5595 * likelly means the controller and host stack are out of sync
5596 * or in case of LE it was still scanning so it can be cleanup
5597 * safely.
5598 */
5599 if (disconnect) {
5600 conn->state = BT_CLOSED;
5601 hci_disconn_cfm(conn, reason);
5602 hci_conn_del(conn);
5603 } else {
5604 hci_conn_failed(conn, reason);
5605 }
5606
5607unlock:
5608 hci_dev_unlock(hdev);
5609 return err;
5610}
5611
5612static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
5613{
5614 struct list_head *head = &hdev->conn_hash.list;
5615 struct hci_conn *conn;
5616
5617 rcu_read_lock();
5618 while ((conn = list_first_or_null_rcu(head, struct hci_conn, list))) {
5619 /* Make sure the connection is not freed while unlocking */
5620 conn = hci_conn_get(conn);
5621 rcu_read_unlock();
5622 /* Disregard possible errors since hci_conn_del shall have been
5623 * called even in case of errors had occurred since it would
5624 * then cause hci_conn_failed to be called which calls
5625 * hci_conn_del internally.
5626 */
5627 hci_abort_conn_sync(hdev, conn, reason);
5628 hci_conn_put(conn);
5629 rcu_read_lock();
5630 }
5631 rcu_read_unlock();
5632
5633 return 0;
5634}
5635
5636/* This function perform power off HCI command sequence as follows:
5637 *
5638 * Clear Advertising
5639 * Stop Discovery
5640 * Disconnect all connections
5641 * hci_dev_close_sync
5642 */
5643static int hci_power_off_sync(struct hci_dev *hdev)
5644{
5645 int err;
5646
5647 /* If controller is already down there is nothing to do */
5648 if (!test_bit(HCI_UP, &hdev->flags))
5649 return 0;
5650
5651 hci_dev_set_flag(hdev, HCI_POWERING_DOWN);
5652
5653 if (test_bit(HCI_ISCAN, &hdev->flags) ||
5654 test_bit(HCI_PSCAN, &hdev->flags)) {
5655 err = hci_write_scan_enable_sync(hdev, 0x00);
5656 if (err)
5657 goto out;
5658 }
5659
5660 err = hci_clear_adv_sync(hdev, NULL, false);
5661 if (err)
5662 goto out;
5663
5664 err = hci_stop_discovery_sync(hdev);
5665 if (err)
5666 goto out;
5667
5668 /* Terminated due to Power Off */
5669 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5670 if (err)
5671 goto out;
5672
5673 err = hci_dev_close_sync(hdev);
5674
5675out:
5676 hci_dev_clear_flag(hdev, HCI_POWERING_DOWN);
5677 return err;
5678}
5679
5680int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
5681{
5682 if (val)
5683 return hci_power_on_sync(hdev);
5684
5685 return hci_power_off_sync(hdev);
5686}
5687
5688static int hci_write_iac_sync(struct hci_dev *hdev)
5689{
5690 struct hci_cp_write_current_iac_lap cp;
5691
5692 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
5693 return 0;
5694
5695 memset(&cp, 0, sizeof(cp));
5696
5697 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
5698 /* Limited discoverable mode */
5699 cp.num_iac = min_t(u8, hdev->num_iac, 2);
5700 cp.iac_lap[0] = 0x00; /* LIAC */
5701 cp.iac_lap[1] = 0x8b;
5702 cp.iac_lap[2] = 0x9e;
5703 cp.iac_lap[3] = 0x33; /* GIAC */
5704 cp.iac_lap[4] = 0x8b;
5705 cp.iac_lap[5] = 0x9e;
5706 } else {
5707 /* General discoverable mode */
5708 cp.num_iac = 1;
5709 cp.iac_lap[0] = 0x33; /* GIAC */
5710 cp.iac_lap[1] = 0x8b;
5711 cp.iac_lap[2] = 0x9e;
5712 }
5713
5714 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
5715 (cp.num_iac * 3) + 1, &cp,
5716 HCI_CMD_TIMEOUT);
5717}
5718
5719int hci_update_discoverable_sync(struct hci_dev *hdev)
5720{
5721 int err = 0;
5722
5723 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
5724 err = hci_write_iac_sync(hdev);
5725 if (err)
5726 return err;
5727
5728 err = hci_update_scan_sync(hdev);
5729 if (err)
5730 return err;
5731
5732 err = hci_update_class_sync(hdev);
5733 if (err)
5734 return err;
5735 }
5736
5737 /* Advertising instances don't use the global discoverable setting, so
5738 * only update AD if advertising was enabled using Set Advertising.
5739 */
5740 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
5741 err = hci_update_adv_data_sync(hdev, 0x00);
5742 if (err)
5743 return err;
5744
5745 /* Discoverable mode affects the local advertising
5746 * address in limited privacy mode.
5747 */
5748 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
5749 if (ext_adv_capable(hdev))
5750 err = hci_start_ext_adv_sync(hdev, 0x00);
5751 else
5752 err = hci_enable_advertising_sync(hdev);
5753 }
5754 }
5755
5756 return err;
5757}
5758
5759static int update_discoverable_sync(struct hci_dev *hdev, void *data)
5760{
5761 return hci_update_discoverable_sync(hdev);
5762}
5763
5764int hci_update_discoverable(struct hci_dev *hdev)
5765{
5766 /* Only queue if it would have any effect */
5767 if (hdev_is_powered(hdev) &&
5768 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
5769 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
5770 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
5771 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
5772 NULL);
5773
5774 return 0;
5775}
5776
5777int hci_update_connectable_sync(struct hci_dev *hdev)
5778{
5779 int err;
5780
5781 err = hci_update_scan_sync(hdev);
5782 if (err)
5783 return err;
5784
5785 /* If BR/EDR is not enabled and we disable advertising as a
5786 * by-product of disabling connectable, we need to update the
5787 * advertising flags.
5788 */
5789 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5790 err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
5791
5792 /* Update the advertising parameters if necessary */
5793 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
5794 !list_empty(&hdev->adv_instances)) {
5795 if (ext_adv_capable(hdev))
5796 err = hci_start_ext_adv_sync(hdev,
5797 hdev->cur_adv_instance);
5798 else
5799 err = hci_enable_advertising_sync(hdev);
5800
5801 if (err)
5802 return err;
5803 }
5804
5805 return hci_update_passive_scan_sync(hdev);
5806}
5807
5808int hci_inquiry_sync(struct hci_dev *hdev, u8 length, u8 num_rsp)
5809{
5810 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
5811 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
5812 struct hci_cp_inquiry cp;
5813
5814 bt_dev_dbg(hdev, "");
5815
5816 if (test_bit(HCI_INQUIRY, &hdev->flags))
5817 return 0;
5818
5819 hci_dev_lock(hdev);
5820 hci_inquiry_cache_flush(hdev);
5821 hci_dev_unlock(hdev);
5822
5823 memset(&cp, 0, sizeof(cp));
5824
5825 if (hdev->discovery.limited)
5826 memcpy(&cp.lap, liac, sizeof(cp.lap));
5827 else
5828 memcpy(&cp.lap, giac, sizeof(cp.lap));
5829
5830 cp.length = length;
5831 cp.num_rsp = num_rsp;
5832
5833 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
5834 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5835}
5836
5837static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
5838{
5839 u8 own_addr_type;
5840 /* Accept list is not used for discovery */
5841 u8 filter_policy = 0x00;
5842 /* Default is to enable duplicates filter */
5843 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
5844 int err;
5845
5846 bt_dev_dbg(hdev, "");
5847
5848 /* If controller is scanning, it means the passive scanning is
5849 * running. Thus, we should temporarily stop it in order to set the
5850 * discovery scanning parameters.
5851 */
5852 err = hci_scan_disable_sync(hdev);
5853 if (err) {
5854 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
5855 return err;
5856 }
5857
5858 cancel_interleave_scan(hdev);
5859
5860 /* Pause address resolution for active scan and stop advertising if
5861 * privacy is enabled.
5862 */
5863 err = hci_pause_addr_resolution(hdev);
5864 if (err)
5865 goto failed;
5866
5867 /* All active scans will be done with either a resolvable private
5868 * address (when privacy feature has been enabled) or non-resolvable
5869 * private address.
5870 */
5871 err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
5872 &own_addr_type);
5873 if (err < 0)
5874 own_addr_type = ADDR_LE_DEV_PUBLIC;
5875
5876 if (hci_is_adv_monitoring(hdev) ||
5877 (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
5878 hdev->discovery.result_filtering)) {
5879 /* Duplicate filter should be disabled when some advertisement
5880 * monitor is activated, otherwise AdvMon can only receive one
5881 * advertisement for one peer(*) during active scanning, and
5882 * might report loss to these peers.
5883 *
5884 * If controller does strict duplicate filtering and the
5885 * discovery requires result filtering disables controller based
5886 * filtering since that can cause reports that would match the
5887 * host filter to not be reported.
5888 */
5889 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
5890 }
5891
5892 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
5893 hdev->le_scan_window_discovery,
5894 own_addr_type, filter_policy, filter_dup);
5895 if (!err)
5896 return err;
5897
5898failed:
5899 /* Resume advertising if it was paused */
5900 if (use_ll_privacy(hdev))
5901 hci_resume_advertising_sync(hdev);
5902
5903 /* Resume passive scanning */
5904 hci_update_passive_scan_sync(hdev);
5905 return err;
5906}
5907
5908static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
5909{
5910 int err;
5911
5912 bt_dev_dbg(hdev, "");
5913
5914 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
5915 if (err)
5916 return err;
5917
5918 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN, 0);
5919}
5920
5921int hci_start_discovery_sync(struct hci_dev *hdev)
5922{
5923 unsigned long timeout;
5924 int err;
5925
5926 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
5927
5928 switch (hdev->discovery.type) {
5929 case DISCOV_TYPE_BREDR:
5930 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN, 0);
5931 case DISCOV_TYPE_INTERLEAVED:
5932 /* When running simultaneous discovery, the LE scanning time
5933 * should occupy the whole discovery time sine BR/EDR inquiry
5934 * and LE scanning are scheduled by the controller.
5935 *
5936 * For interleaving discovery in comparison, BR/EDR inquiry
5937 * and LE scanning are done sequentially with separate
5938 * timeouts.
5939 */
5940 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
5941 &hdev->quirks)) {
5942 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5943 /* During simultaneous discovery, we double LE scan
5944 * interval. We must leave some time for the controller
5945 * to do BR/EDR inquiry.
5946 */
5947 err = hci_start_interleaved_discovery_sync(hdev);
5948 break;
5949 }
5950
5951 timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
5952 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5953 break;
5954 case DISCOV_TYPE_LE:
5955 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5956 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5957 break;
5958 default:
5959 return -EINVAL;
5960 }
5961
5962 if (err)
5963 return err;
5964
5965 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
5966
5967 queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
5968 timeout);
5969 return 0;
5970}
5971
5972static void hci_suspend_monitor_sync(struct hci_dev *hdev)
5973{
5974 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5975 case HCI_ADV_MONITOR_EXT_MSFT:
5976 msft_suspend_sync(hdev);
5977 break;
5978 default:
5979 return;
5980 }
5981}
5982
5983/* This function disables discovery and mark it as paused */
5984static int hci_pause_discovery_sync(struct hci_dev *hdev)
5985{
5986 int old_state = hdev->discovery.state;
5987 int err;
5988
5989 /* If discovery already stopped/stopping/paused there nothing to do */
5990 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
5991 hdev->discovery_paused)
5992 return 0;
5993
5994 hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
5995 err = hci_stop_discovery_sync(hdev);
5996 if (err)
5997 return err;
5998
5999 hdev->discovery_paused = true;
6000 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
6001
6002 return 0;
6003}
6004
6005static int hci_update_event_filter_sync(struct hci_dev *hdev)
6006{
6007 struct bdaddr_list_with_flags *b;
6008 u8 scan = SCAN_DISABLED;
6009 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
6010 int err;
6011
6012 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
6013 return 0;
6014
6015 /* Some fake CSR controllers lock up after setting this type of
6016 * filter, so avoid sending the request altogether.
6017 */
6018 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
6019 return 0;
6020
6021 /* Always clear event filter when starting */
6022 hci_clear_event_filter_sync(hdev);
6023
6024 list_for_each_entry(b, &hdev->accept_list, list) {
6025 if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
6026 continue;
6027
6028 bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
6029
6030 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
6031 HCI_CONN_SETUP_ALLOW_BDADDR,
6032 &b->bdaddr,
6033 HCI_CONN_SETUP_AUTO_ON);
6034 if (err)
6035 bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
6036 &b->bdaddr);
6037 else
6038 scan = SCAN_PAGE;
6039 }
6040
6041 if (scan && !scanning)
6042 hci_write_scan_enable_sync(hdev, scan);
6043 else if (!scan && scanning)
6044 hci_write_scan_enable_sync(hdev, scan);
6045
6046 return 0;
6047}
6048
6049/* This function disables scan (BR and LE) and mark it as paused */
6050static int hci_pause_scan_sync(struct hci_dev *hdev)
6051{
6052 if (hdev->scanning_paused)
6053 return 0;
6054
6055 /* Disable page scan if enabled */
6056 if (test_bit(HCI_PSCAN, &hdev->flags))
6057 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
6058
6059 hci_scan_disable_sync(hdev);
6060
6061 hdev->scanning_paused = true;
6062
6063 return 0;
6064}
6065
6066/* This function performs the HCI suspend procedures in the follow order:
6067 *
6068 * Pause discovery (active scanning/inquiry)
6069 * Pause Directed Advertising/Advertising
6070 * Pause Scanning (passive scanning in case discovery was not active)
6071 * Disconnect all connections
6072 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
6073 * otherwise:
6074 * Update event mask (only set events that are allowed to wake up the host)
6075 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
6076 * Update passive scanning (lower duty cycle)
6077 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
6078 */
6079int hci_suspend_sync(struct hci_dev *hdev)
6080{
6081 int err;
6082
6083 /* If marked as suspended there nothing to do */
6084 if (hdev->suspended)
6085 return 0;
6086
6087 /* Mark device as suspended */
6088 hdev->suspended = true;
6089
6090 /* Pause discovery if not already stopped */
6091 hci_pause_discovery_sync(hdev);
6092
6093 /* Pause other advertisements */
6094 hci_pause_advertising_sync(hdev);
6095
6096 /* Suspend monitor filters */
6097 hci_suspend_monitor_sync(hdev);
6098
6099 /* Prevent disconnects from causing scanning to be re-enabled */
6100 hci_pause_scan_sync(hdev);
6101
6102 if (hci_conn_count(hdev)) {
6103 /* Soft disconnect everything (power off) */
6104 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
6105 if (err) {
6106 /* Set state to BT_RUNNING so resume doesn't notify */
6107 hdev->suspend_state = BT_RUNNING;
6108 hci_resume_sync(hdev);
6109 return err;
6110 }
6111
6112 /* Update event mask so only the allowed event can wakeup the
6113 * host.
6114 */
6115 hci_set_event_mask_sync(hdev);
6116 }
6117
6118 /* Only configure accept list if disconnect succeeded and wake
6119 * isn't being prevented.
6120 */
6121 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
6122 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
6123 return 0;
6124 }
6125
6126 /* Unpause to take care of updating scanning params */
6127 hdev->scanning_paused = false;
6128
6129 /* Enable event filter for paired devices */
6130 hci_update_event_filter_sync(hdev);
6131
6132 /* Update LE passive scan if enabled */
6133 hci_update_passive_scan_sync(hdev);
6134
6135 /* Pause scan changes again. */
6136 hdev->scanning_paused = true;
6137
6138 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
6139
6140 return 0;
6141}
6142
6143/* This function resumes discovery */
6144static int hci_resume_discovery_sync(struct hci_dev *hdev)
6145{
6146 int err;
6147
6148 /* If discovery not paused there nothing to do */
6149 if (!hdev->discovery_paused)
6150 return 0;
6151
6152 hdev->discovery_paused = false;
6153
6154 hci_discovery_set_state(hdev, DISCOVERY_STARTING);
6155
6156 err = hci_start_discovery_sync(hdev);
6157
6158 hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
6159 DISCOVERY_FINDING);
6160
6161 return err;
6162}
6163
6164static void hci_resume_monitor_sync(struct hci_dev *hdev)
6165{
6166 switch (hci_get_adv_monitor_offload_ext(hdev)) {
6167 case HCI_ADV_MONITOR_EXT_MSFT:
6168 msft_resume_sync(hdev);
6169 break;
6170 default:
6171 return;
6172 }
6173}
6174
6175/* This function resume scan and reset paused flag */
6176static int hci_resume_scan_sync(struct hci_dev *hdev)
6177{
6178 if (!hdev->scanning_paused)
6179 return 0;
6180
6181 hdev->scanning_paused = false;
6182
6183 hci_update_scan_sync(hdev);
6184
6185 /* Reset passive scanning to normal */
6186 hci_update_passive_scan_sync(hdev);
6187
6188 return 0;
6189}
6190
6191/* This function performs the HCI suspend procedures in the follow order:
6192 *
6193 * Restore event mask
6194 * Clear event filter
6195 * Update passive scanning (normal duty cycle)
6196 * Resume Directed Advertising/Advertising
6197 * Resume discovery (active scanning/inquiry)
6198 */
6199int hci_resume_sync(struct hci_dev *hdev)
6200{
6201 /* If not marked as suspended there nothing to do */
6202 if (!hdev->suspended)
6203 return 0;
6204
6205 hdev->suspended = false;
6206
6207 /* Restore event mask */
6208 hci_set_event_mask_sync(hdev);
6209
6210 /* Clear any event filters and restore scan state */
6211 hci_clear_event_filter_sync(hdev);
6212
6213 /* Resume scanning */
6214 hci_resume_scan_sync(hdev);
6215
6216 /* Resume monitor filters */
6217 hci_resume_monitor_sync(hdev);
6218
6219 /* Resume other advertisements */
6220 hci_resume_advertising_sync(hdev);
6221
6222 /* Resume discovery */
6223 hci_resume_discovery_sync(hdev);
6224
6225 return 0;
6226}
6227
6228static bool conn_use_rpa(struct hci_conn *conn)
6229{
6230 struct hci_dev *hdev = conn->hdev;
6231
6232 return hci_dev_test_flag(hdev, HCI_PRIVACY);
6233}
6234
6235static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
6236 struct hci_conn *conn)
6237{
6238 struct hci_cp_le_set_ext_adv_params cp;
6239 int err;
6240 bdaddr_t random_addr;
6241 u8 own_addr_type;
6242
6243 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6244 &own_addr_type);
6245 if (err)
6246 return err;
6247
6248 /* Set require_privacy to false so that the remote device has a
6249 * chance of identifying us.
6250 */
6251 err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
6252 &own_addr_type, &random_addr);
6253 if (err)
6254 return err;
6255
6256 memset(&cp, 0, sizeof(cp));
6257
6258 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
6259 cp.channel_map = hdev->le_adv_channel_map;
6260 cp.tx_power = HCI_TX_POWER_INVALID;
6261 cp.primary_phy = HCI_ADV_PHY_1M;
6262 cp.secondary_phy = HCI_ADV_PHY_1M;
6263 cp.handle = 0x00; /* Use instance 0 for directed adv */
6264 cp.own_addr_type = own_addr_type;
6265 cp.peer_addr_type = conn->dst_type;
6266 bacpy(&cp.peer_addr, &conn->dst);
6267
6268 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
6269 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
6270 * does not supports advertising data when the advertising set already
6271 * contains some, the controller shall return erroc code 'Invalid
6272 * HCI Command Parameters(0x12).
6273 * So it is required to remove adv set for handle 0x00. since we use
6274 * instance 0 for directed adv.
6275 */
6276 err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
6277 if (err)
6278 return err;
6279
6280 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
6281 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6282 if (err)
6283 return err;
6284
6285 /* Check if random address need to be updated */
6286 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
6287 bacmp(&random_addr, BDADDR_ANY) &&
6288 bacmp(&random_addr, &hdev->random_addr)) {
6289 err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
6290 &random_addr);
6291 if (err)
6292 return err;
6293 }
6294
6295 return hci_enable_ext_advertising_sync(hdev, 0x00);
6296}
6297
6298static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
6299 struct hci_conn *conn)
6300{
6301 struct hci_cp_le_set_adv_param cp;
6302 u8 status;
6303 u8 own_addr_type;
6304 u8 enable;
6305
6306 if (ext_adv_capable(hdev))
6307 return hci_le_ext_directed_advertising_sync(hdev, conn);
6308
6309 /* Clear the HCI_LE_ADV bit temporarily so that the
6310 * hci_update_random_address knows that it's safe to go ahead
6311 * and write a new random address. The flag will be set back on
6312 * as soon as the SET_ADV_ENABLE HCI command completes.
6313 */
6314 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6315
6316 /* Set require_privacy to false so that the remote device has a
6317 * chance of identifying us.
6318 */
6319 status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6320 &own_addr_type);
6321 if (status)
6322 return status;
6323
6324 memset(&cp, 0, sizeof(cp));
6325
6326 /* Some controllers might reject command if intervals are not
6327 * within range for undirected advertising.
6328 * BCM20702A0 is known to be affected by this.
6329 */
6330 cp.min_interval = cpu_to_le16(0x0020);
6331 cp.max_interval = cpu_to_le16(0x0020);
6332
6333 cp.type = LE_ADV_DIRECT_IND;
6334 cp.own_address_type = own_addr_type;
6335 cp.direct_addr_type = conn->dst_type;
6336 bacpy(&cp.direct_addr, &conn->dst);
6337 cp.channel_map = hdev->le_adv_channel_map;
6338
6339 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
6340 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6341 if (status)
6342 return status;
6343
6344 enable = 0x01;
6345
6346 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
6347 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
6348}
6349
6350static void set_ext_conn_params(struct hci_conn *conn,
6351 struct hci_cp_le_ext_conn_param *p)
6352{
6353 struct hci_dev *hdev = conn->hdev;
6354
6355 memset(p, 0, sizeof(*p));
6356
6357 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6358 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6359 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6360 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6361 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
6362 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6363 p->min_ce_len = cpu_to_le16(0x0000);
6364 p->max_ce_len = cpu_to_le16(0x0000);
6365}
6366
6367static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
6368 struct hci_conn *conn, u8 own_addr_type)
6369{
6370 struct hci_cp_le_ext_create_conn *cp;
6371 struct hci_cp_le_ext_conn_param *p;
6372 u8 data[sizeof(*cp) + sizeof(*p) * 3];
6373 u32 plen;
6374
6375 cp = (void *)data;
6376 p = (void *)cp->data;
6377
6378 memset(cp, 0, sizeof(*cp));
6379
6380 bacpy(&cp->peer_addr, &conn->dst);
6381 cp->peer_addr_type = conn->dst_type;
6382 cp->own_addr_type = own_addr_type;
6383
6384 plen = sizeof(*cp);
6385
6386 if (scan_1m(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_1M ||
6387 conn->le_adv_sec_phy == HCI_ADV_PHY_1M)) {
6388 cp->phys |= LE_SCAN_PHY_1M;
6389 set_ext_conn_params(conn, p);
6390
6391 p++;
6392 plen += sizeof(*p);
6393 }
6394
6395 if (scan_2m(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_2M ||
6396 conn->le_adv_sec_phy == HCI_ADV_PHY_2M)) {
6397 cp->phys |= LE_SCAN_PHY_2M;
6398 set_ext_conn_params(conn, p);
6399
6400 p++;
6401 plen += sizeof(*p);
6402 }
6403
6404 if (scan_coded(hdev) && (conn->le_adv_phy == HCI_ADV_PHY_CODED ||
6405 conn->le_adv_sec_phy == HCI_ADV_PHY_CODED)) {
6406 cp->phys |= LE_SCAN_PHY_CODED;
6407 set_ext_conn_params(conn, p);
6408
6409 plen += sizeof(*p);
6410 }
6411
6412 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
6413 plen, data,
6414 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
6415 conn->conn_timeout, NULL);
6416}
6417
6418static int hci_le_create_conn_sync(struct hci_dev *hdev, void *data)
6419{
6420 struct hci_cp_le_create_conn cp;
6421 struct hci_conn_params *params;
6422 u8 own_addr_type;
6423 int err;
6424 struct hci_conn *conn = data;
6425
6426 if (!hci_conn_valid(hdev, conn))
6427 return -ECANCELED;
6428
6429 bt_dev_dbg(hdev, "conn %p", conn);
6430
6431 clear_bit(HCI_CONN_SCANNING, &conn->flags);
6432 conn->state = BT_CONNECT;
6433
6434 /* If requested to connect as peripheral use directed advertising */
6435 if (conn->role == HCI_ROLE_SLAVE) {
6436 /* If we're active scanning and simultaneous roles is not
6437 * enabled simply reject the attempt.
6438 */
6439 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
6440 hdev->le_scan_type == LE_SCAN_ACTIVE &&
6441 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
6442 hci_conn_del(conn);
6443 return -EBUSY;
6444 }
6445
6446 /* Pause advertising while doing directed advertising. */
6447 hci_pause_advertising_sync(hdev);
6448
6449 err = hci_le_directed_advertising_sync(hdev, conn);
6450 goto done;
6451 }
6452
6453 /* Disable advertising if simultaneous roles is not in use. */
6454 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
6455 hci_pause_advertising_sync(hdev);
6456
6457 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
6458 if (params) {
6459 conn->le_conn_min_interval = params->conn_min_interval;
6460 conn->le_conn_max_interval = params->conn_max_interval;
6461 conn->le_conn_latency = params->conn_latency;
6462 conn->le_supv_timeout = params->supervision_timeout;
6463 } else {
6464 conn->le_conn_min_interval = hdev->le_conn_min_interval;
6465 conn->le_conn_max_interval = hdev->le_conn_max_interval;
6466 conn->le_conn_latency = hdev->le_conn_latency;
6467 conn->le_supv_timeout = hdev->le_supv_timeout;
6468 }
6469
6470 /* If controller is scanning, we stop it since some controllers are
6471 * not able to scan and connect at the same time. Also set the
6472 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
6473 * handler for scan disabling knows to set the correct discovery
6474 * state.
6475 */
6476 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
6477 hci_scan_disable_sync(hdev);
6478 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
6479 }
6480
6481 /* Update random address, but set require_privacy to false so
6482 * that we never connect with an non-resolvable address.
6483 */
6484 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6485 &own_addr_type);
6486 if (err)
6487 goto done;
6488 /* Send command LE Extended Create Connection if supported */
6489 if (use_ext_conn(hdev)) {
6490 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
6491 goto done;
6492 }
6493
6494 memset(&cp, 0, sizeof(cp));
6495
6496 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6497 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6498
6499 bacpy(&cp.peer_addr, &conn->dst);
6500 cp.peer_addr_type = conn->dst_type;
6501 cp.own_address_type = own_addr_type;
6502 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6503 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6504 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
6505 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6506 cp.min_ce_len = cpu_to_le16(0x0000);
6507 cp.max_ce_len = cpu_to_le16(0x0000);
6508
6509 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
6510 *
6511 * If this event is unmasked and the HCI_LE_Connection_Complete event
6512 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
6513 * sent when a new connection has been created.
6514 */
6515 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
6516 sizeof(cp), &cp,
6517 use_enhanced_conn_complete(hdev) ?
6518 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
6519 HCI_EV_LE_CONN_COMPLETE,
6520 conn->conn_timeout, NULL);
6521
6522done:
6523 if (err == -ETIMEDOUT)
6524 hci_le_connect_cancel_sync(hdev, conn, 0x00);
6525
6526 /* Re-enable advertising after the connection attempt is finished. */
6527 hci_resume_advertising_sync(hdev);
6528 return err;
6529}
6530
6531int hci_le_create_cis_sync(struct hci_dev *hdev)
6532{
6533 DEFINE_FLEX(struct hci_cp_le_create_cis, cmd, cis, num_cis, 0x1f);
6534 size_t aux_num_cis = 0;
6535 struct hci_conn *conn;
6536 u8 cig = BT_ISO_QOS_CIG_UNSET;
6537
6538 /* The spec allows only one pending LE Create CIS command at a time. If
6539 * the command is pending now, don't do anything. We check for pending
6540 * connections after each CIS Established event.
6541 *
6542 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6543 * page 2566:
6544 *
6545 * If the Host issues this command before all the
6546 * HCI_LE_CIS_Established events from the previous use of the
6547 * command have been generated, the Controller shall return the
6548 * error code Command Disallowed (0x0C).
6549 *
6550 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6551 * page 2567:
6552 *
6553 * When the Controller receives the HCI_LE_Create_CIS command, the
6554 * Controller sends the HCI_Command_Status event to the Host. An
6555 * HCI_LE_CIS_Established event will be generated for each CIS when it
6556 * is established or if it is disconnected or considered lost before
6557 * being established; until all the events are generated, the command
6558 * remains pending.
6559 */
6560
6561 hci_dev_lock(hdev);
6562
6563 rcu_read_lock();
6564
6565 /* Wait until previous Create CIS has completed */
6566 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6567 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
6568 goto done;
6569 }
6570
6571 /* Find CIG with all CIS ready */
6572 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6573 struct hci_conn *link;
6574
6575 if (hci_conn_check_create_cis(conn))
6576 continue;
6577
6578 cig = conn->iso_qos.ucast.cig;
6579
6580 list_for_each_entry_rcu(link, &hdev->conn_hash.list, list) {
6581 if (hci_conn_check_create_cis(link) > 0 &&
6582 link->iso_qos.ucast.cig == cig &&
6583 link->state != BT_CONNECTED) {
6584 cig = BT_ISO_QOS_CIG_UNSET;
6585 break;
6586 }
6587 }
6588
6589 if (cig != BT_ISO_QOS_CIG_UNSET)
6590 break;
6591 }
6592
6593 if (cig == BT_ISO_QOS_CIG_UNSET)
6594 goto done;
6595
6596 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6597 struct hci_cis *cis = &cmd->cis[aux_num_cis];
6598
6599 if (hci_conn_check_create_cis(conn) ||
6600 conn->iso_qos.ucast.cig != cig)
6601 continue;
6602
6603 set_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6604 cis->acl_handle = cpu_to_le16(conn->parent->handle);
6605 cis->cis_handle = cpu_to_le16(conn->handle);
6606 aux_num_cis++;
6607
6608 if (aux_num_cis >= cmd->num_cis)
6609 break;
6610 }
6611 cmd->num_cis = aux_num_cis;
6612
6613done:
6614 rcu_read_unlock();
6615
6616 hci_dev_unlock(hdev);
6617
6618 if (!aux_num_cis)
6619 return 0;
6620
6621 /* Wait for HCI_LE_CIS_Established */
6622 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CIS,
6623 struct_size(cmd, cis, cmd->num_cis),
6624 cmd, HCI_EVT_LE_CIS_ESTABLISHED,
6625 conn->conn_timeout, NULL);
6626}
6627
6628int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle)
6629{
6630 struct hci_cp_le_remove_cig cp;
6631
6632 memset(&cp, 0, sizeof(cp));
6633 cp.cig_id = handle;
6634
6635 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp),
6636 &cp, HCI_CMD_TIMEOUT);
6637}
6638
6639int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle)
6640{
6641 struct hci_cp_le_big_term_sync cp;
6642
6643 memset(&cp, 0, sizeof(cp));
6644 cp.handle = handle;
6645
6646 return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC,
6647 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6648}
6649
6650int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
6651{
6652 struct hci_cp_le_pa_term_sync cp;
6653
6654 memset(&cp, 0, sizeof(cp));
6655 cp.handle = cpu_to_le16(handle);
6656
6657 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
6658 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6659}
6660
6661int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
6662 bool use_rpa, struct adv_info *adv_instance,
6663 u8 *own_addr_type, bdaddr_t *rand_addr)
6664{
6665 int err;
6666
6667 bacpy(rand_addr, BDADDR_ANY);
6668
6669 /* If privacy is enabled use a resolvable private address. If
6670 * current RPA has expired then generate a new one.
6671 */
6672 if (use_rpa) {
6673 /* If Controller supports LL Privacy use own address type is
6674 * 0x03
6675 */
6676 if (use_ll_privacy(hdev))
6677 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
6678 else
6679 *own_addr_type = ADDR_LE_DEV_RANDOM;
6680
6681 if (adv_instance) {
6682 if (adv_rpa_valid(adv_instance))
6683 return 0;
6684 } else {
6685 if (rpa_valid(hdev))
6686 return 0;
6687 }
6688
6689 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
6690 if (err < 0) {
6691 bt_dev_err(hdev, "failed to generate new RPA");
6692 return err;
6693 }
6694
6695 bacpy(rand_addr, &hdev->rpa);
6696
6697 return 0;
6698 }
6699
6700 /* In case of required privacy without resolvable private address,
6701 * use an non-resolvable private address. This is useful for
6702 * non-connectable advertising.
6703 */
6704 if (require_privacy) {
6705 bdaddr_t nrpa;
6706
6707 while (true) {
6708 /* The non-resolvable private address is generated
6709 * from random six bytes with the two most significant
6710 * bits cleared.
6711 */
6712 get_random_bytes(&nrpa, 6);
6713 nrpa.b[5] &= 0x3f;
6714
6715 /* The non-resolvable private address shall not be
6716 * equal to the public address.
6717 */
6718 if (bacmp(&hdev->bdaddr, &nrpa))
6719 break;
6720 }
6721
6722 *own_addr_type = ADDR_LE_DEV_RANDOM;
6723 bacpy(rand_addr, &nrpa);
6724
6725 return 0;
6726 }
6727
6728 /* No privacy so use a public address. */
6729 *own_addr_type = ADDR_LE_DEV_PUBLIC;
6730
6731 return 0;
6732}
6733
6734static int _update_adv_data_sync(struct hci_dev *hdev, void *data)
6735{
6736 u8 instance = PTR_UINT(data);
6737
6738 return hci_update_adv_data_sync(hdev, instance);
6739}
6740
6741int hci_update_adv_data(struct hci_dev *hdev, u8 instance)
6742{
6743 return hci_cmd_sync_queue(hdev, _update_adv_data_sync,
6744 UINT_PTR(instance), NULL);
6745}
6746
6747static int hci_acl_create_conn_sync(struct hci_dev *hdev, void *data)
6748{
6749 struct hci_conn *conn = data;
6750 struct inquiry_entry *ie;
6751 struct hci_cp_create_conn cp;
6752 int err;
6753
6754 if (!hci_conn_valid(hdev, conn))
6755 return -ECANCELED;
6756
6757 /* Many controllers disallow HCI Create Connection while it is doing
6758 * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
6759 * Connection. This may cause the MGMT discovering state to become false
6760 * without user space's request but it is okay since the MGMT Discovery
6761 * APIs do not promise that discovery should be done forever. Instead,
6762 * the user space monitors the status of MGMT discovering and it may
6763 * request for discovery again when this flag becomes false.
6764 */
6765 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
6766 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL, 0,
6767 NULL, HCI_CMD_TIMEOUT);
6768 if (err)
6769 bt_dev_warn(hdev, "Failed to cancel inquiry %d", err);
6770 }
6771
6772 conn->state = BT_CONNECT;
6773 conn->out = true;
6774 conn->role = HCI_ROLE_MASTER;
6775
6776 conn->attempt++;
6777
6778 conn->link_policy = hdev->link_policy;
6779
6780 memset(&cp, 0, sizeof(cp));
6781 bacpy(&cp.bdaddr, &conn->dst);
6782 cp.pscan_rep_mode = 0x02;
6783
6784 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
6785 if (ie) {
6786 if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
6787 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
6788 cp.pscan_mode = ie->data.pscan_mode;
6789 cp.clock_offset = ie->data.clock_offset |
6790 cpu_to_le16(0x8000);
6791 }
6792
6793 memcpy(conn->dev_class, ie->data.dev_class, 3);
6794 }
6795
6796 cp.pkt_type = cpu_to_le16(conn->pkt_type);
6797 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
6798 cp.role_switch = 0x01;
6799 else
6800 cp.role_switch = 0x00;
6801
6802 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN,
6803 sizeof(cp), &cp,
6804 HCI_EV_CONN_COMPLETE,
6805 conn->conn_timeout, NULL);
6806}
6807
6808int hci_connect_acl_sync(struct hci_dev *hdev, struct hci_conn *conn)
6809{
6810 return hci_cmd_sync_queue_once(hdev, hci_acl_create_conn_sync, conn,
6811 NULL);
6812}
6813
6814static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
6815{
6816 struct hci_conn *conn = data;
6817
6818 bt_dev_dbg(hdev, "err %d", err);
6819
6820 if (err == -ECANCELED)
6821 return;
6822
6823 hci_dev_lock(hdev);
6824
6825 if (!hci_conn_valid(hdev, conn))
6826 goto done;
6827
6828 if (!err) {
6829 hci_connect_le_scan_cleanup(conn, 0x00);
6830 goto done;
6831 }
6832
6833 /* Check if connection is still pending */
6834 if (conn != hci_lookup_le_connect(hdev))
6835 goto done;
6836
6837 /* Flush to make sure we send create conn cancel command if needed */
6838 flush_delayed_work(&conn->le_conn_timeout);
6839 hci_conn_failed(conn, bt_status(err));
6840
6841done:
6842 hci_dev_unlock(hdev);
6843}
6844
6845int hci_connect_le_sync(struct hci_dev *hdev, struct hci_conn *conn)
6846{
6847 return hci_cmd_sync_queue_once(hdev, hci_le_create_conn_sync, conn,
6848 create_le_conn_complete);
6849}
6850
6851int hci_cancel_connect_sync(struct hci_dev *hdev, struct hci_conn *conn)
6852{
6853 if (conn->state != BT_OPEN)
6854 return -EINVAL;
6855
6856 switch (conn->type) {
6857 case ACL_LINK:
6858 return !hci_cmd_sync_dequeue_once(hdev,
6859 hci_acl_create_conn_sync,
6860 conn, NULL);
6861 case LE_LINK:
6862 return !hci_cmd_sync_dequeue_once(hdev, hci_le_create_conn_sync,
6863 conn, create_le_conn_complete);
6864 }
6865
6866 return -ENOENT;
6867}
6868
6869int hci_le_conn_update_sync(struct hci_dev *hdev, struct hci_conn *conn,
6870 struct hci_conn_params *params)
6871{
6872 struct hci_cp_le_conn_update cp;
6873
6874 memset(&cp, 0, sizeof(cp));
6875 cp.handle = cpu_to_le16(conn->handle);
6876 cp.conn_interval_min = cpu_to_le16(params->conn_min_interval);
6877 cp.conn_interval_max = cpu_to_le16(params->conn_max_interval);
6878 cp.conn_latency = cpu_to_le16(params->conn_latency);
6879 cp.supervision_timeout = cpu_to_le16(params->supervision_timeout);
6880 cp.min_ce_len = cpu_to_le16(0x0000);
6881 cp.max_ce_len = cpu_to_le16(0x0000);
6882
6883 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CONN_UPDATE,
6884 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6885}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2021 Intel Corporation
6 */
7
8#include <linux/property.h>
9
10#include <net/bluetooth/bluetooth.h>
11#include <net/bluetooth/hci_core.h>
12#include <net/bluetooth/mgmt.h>
13
14#include "hci_request.h"
15#include "hci_codec.h"
16#include "hci_debugfs.h"
17#include "smp.h"
18#include "eir.h"
19#include "msft.h"
20#include "aosp.h"
21#include "leds.h"
22
23static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
24 struct sk_buff *skb)
25{
26 bt_dev_dbg(hdev, "result 0x%2.2x", result);
27
28 if (hdev->req_status != HCI_REQ_PEND)
29 return;
30
31 hdev->req_result = result;
32 hdev->req_status = HCI_REQ_DONE;
33
34 if (skb) {
35 struct sock *sk = hci_skb_sk(skb);
36
37 /* Drop sk reference if set */
38 if (sk)
39 sock_put(sk);
40
41 hdev->req_skb = skb_get(skb);
42 }
43
44 wake_up_interruptible(&hdev->req_wait_q);
45}
46
47static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode,
48 u32 plen, const void *param,
49 struct sock *sk)
50{
51 int len = HCI_COMMAND_HDR_SIZE + plen;
52 struct hci_command_hdr *hdr;
53 struct sk_buff *skb;
54
55 skb = bt_skb_alloc(len, GFP_ATOMIC);
56 if (!skb)
57 return NULL;
58
59 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
60 hdr->opcode = cpu_to_le16(opcode);
61 hdr->plen = plen;
62
63 if (plen)
64 skb_put_data(skb, param, plen);
65
66 bt_dev_dbg(hdev, "skb len %d", skb->len);
67
68 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
69 hci_skb_opcode(skb) = opcode;
70
71 /* Grab a reference if command needs to be associated with a sock (e.g.
72 * likely mgmt socket that initiated the command).
73 */
74 if (sk) {
75 hci_skb_sk(skb) = sk;
76 sock_hold(sk);
77 }
78
79 return skb;
80}
81
82static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
83 const void *param, u8 event, struct sock *sk)
84{
85 struct hci_dev *hdev = req->hdev;
86 struct sk_buff *skb;
87
88 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
89
90 /* If an error occurred during request building, there is no point in
91 * queueing the HCI command. We can simply return.
92 */
93 if (req->err)
94 return;
95
96 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
97 if (!skb) {
98 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
99 opcode);
100 req->err = -ENOMEM;
101 return;
102 }
103
104 if (skb_queue_empty(&req->cmd_q))
105 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
106
107 hci_skb_event(skb) = event;
108
109 skb_queue_tail(&req->cmd_q, skb);
110}
111
112static int hci_cmd_sync_run(struct hci_request *req)
113{
114 struct hci_dev *hdev = req->hdev;
115 struct sk_buff *skb;
116 unsigned long flags;
117
118 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
119
120 /* If an error occurred during request building, remove all HCI
121 * commands queued on the HCI request queue.
122 */
123 if (req->err) {
124 skb_queue_purge(&req->cmd_q);
125 return req->err;
126 }
127
128 /* Do not allow empty requests */
129 if (skb_queue_empty(&req->cmd_q))
130 return -ENODATA;
131
132 skb = skb_peek_tail(&req->cmd_q);
133 bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
134 bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
135
136 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
137 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
138 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
139
140 queue_work(hdev->workqueue, &hdev->cmd_work);
141
142 return 0;
143}
144
145/* This function requires the caller holds hdev->req_lock. */
146struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
147 const void *param, u8 event, u32 timeout,
148 struct sock *sk)
149{
150 struct hci_request req;
151 struct sk_buff *skb;
152 int err = 0;
153
154 bt_dev_dbg(hdev, "Opcode 0x%4x", opcode);
155
156 hci_req_init(&req, hdev);
157
158 hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
159
160 hdev->req_status = HCI_REQ_PEND;
161
162 err = hci_cmd_sync_run(&req);
163 if (err < 0)
164 return ERR_PTR(err);
165
166 err = wait_event_interruptible_timeout(hdev->req_wait_q,
167 hdev->req_status != HCI_REQ_PEND,
168 timeout);
169
170 if (err == -ERESTARTSYS)
171 return ERR_PTR(-EINTR);
172
173 switch (hdev->req_status) {
174 case HCI_REQ_DONE:
175 err = -bt_to_errno(hdev->req_result);
176 break;
177
178 case HCI_REQ_CANCELED:
179 err = -hdev->req_result;
180 break;
181
182 default:
183 err = -ETIMEDOUT;
184 break;
185 }
186
187 hdev->req_status = 0;
188 hdev->req_result = 0;
189 skb = hdev->req_skb;
190 hdev->req_skb = NULL;
191
192 bt_dev_dbg(hdev, "end: err %d", err);
193
194 if (err < 0) {
195 kfree_skb(skb);
196 return ERR_PTR(err);
197 }
198
199 return skb;
200}
201EXPORT_SYMBOL(__hci_cmd_sync_sk);
202
203/* This function requires the caller holds hdev->req_lock. */
204struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
205 const void *param, u32 timeout)
206{
207 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
208}
209EXPORT_SYMBOL(__hci_cmd_sync);
210
211/* Send HCI command and wait for command complete event */
212struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
213 const void *param, u32 timeout)
214{
215 struct sk_buff *skb;
216
217 if (!test_bit(HCI_UP, &hdev->flags))
218 return ERR_PTR(-ENETDOWN);
219
220 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
221
222 hci_req_sync_lock(hdev);
223 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
224 hci_req_sync_unlock(hdev);
225
226 return skb;
227}
228EXPORT_SYMBOL(hci_cmd_sync);
229
230/* This function requires the caller holds hdev->req_lock. */
231struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
232 const void *param, u8 event, u32 timeout)
233{
234 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
235 NULL);
236}
237EXPORT_SYMBOL(__hci_cmd_sync_ev);
238
239/* This function requires the caller holds hdev->req_lock. */
240int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
241 const void *param, u8 event, u32 timeout,
242 struct sock *sk)
243{
244 struct sk_buff *skb;
245 u8 status;
246
247 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
248 if (IS_ERR(skb)) {
249 bt_dev_err(hdev, "Opcode 0x%4x failed: %ld", opcode,
250 PTR_ERR(skb));
251 return PTR_ERR(skb);
252 }
253
254 /* If command return a status event skb will be set to NULL as there are
255 * no parameters, in case of failure IS_ERR(skb) would have be set to
256 * the actual error would be found with PTR_ERR(skb).
257 */
258 if (!skb)
259 return 0;
260
261 status = skb->data[0];
262
263 kfree_skb(skb);
264
265 return status;
266}
267EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
268
269int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
270 const void *param, u32 timeout)
271{
272 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
273 NULL);
274}
275EXPORT_SYMBOL(__hci_cmd_sync_status);
276
277static void hci_cmd_sync_work(struct work_struct *work)
278{
279 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
280
281 bt_dev_dbg(hdev, "");
282
283 /* Dequeue all entries and run them */
284 while (1) {
285 struct hci_cmd_sync_work_entry *entry;
286
287 mutex_lock(&hdev->cmd_sync_work_lock);
288 entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
289 struct hci_cmd_sync_work_entry,
290 list);
291 if (entry)
292 list_del(&entry->list);
293 mutex_unlock(&hdev->cmd_sync_work_lock);
294
295 if (!entry)
296 break;
297
298 bt_dev_dbg(hdev, "entry %p", entry);
299
300 if (entry->func) {
301 int err;
302
303 hci_req_sync_lock(hdev);
304 err = entry->func(hdev, entry->data);
305 if (entry->destroy)
306 entry->destroy(hdev, entry->data, err);
307 hci_req_sync_unlock(hdev);
308 }
309
310 kfree(entry);
311 }
312}
313
314static void hci_cmd_sync_cancel_work(struct work_struct *work)
315{
316 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
317
318 cancel_delayed_work_sync(&hdev->cmd_timer);
319 cancel_delayed_work_sync(&hdev->ncmd_timer);
320 atomic_set(&hdev->cmd_cnt, 1);
321
322 wake_up_interruptible(&hdev->req_wait_q);
323}
324
325static int hci_scan_disable_sync(struct hci_dev *hdev);
326static int scan_disable_sync(struct hci_dev *hdev, void *data)
327{
328 return hci_scan_disable_sync(hdev);
329}
330
331static int hci_inquiry_sync(struct hci_dev *hdev, u8 length);
332static int interleaved_inquiry_sync(struct hci_dev *hdev, void *data)
333{
334 return hci_inquiry_sync(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN);
335}
336
337static void le_scan_disable(struct work_struct *work)
338{
339 struct hci_dev *hdev = container_of(work, struct hci_dev,
340 le_scan_disable.work);
341 int status;
342
343 bt_dev_dbg(hdev, "");
344 hci_dev_lock(hdev);
345
346 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
347 goto _return;
348
349 cancel_delayed_work(&hdev->le_scan_restart);
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);
398static int hci_le_scan_restart_sync(struct hci_dev *hdev)
399{
400 /* If controller is not scanning we are done. */
401 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
402 return 0;
403
404 if (hdev->scanning_paused) {
405 bt_dev_dbg(hdev, "Scanning is paused for suspend");
406 return 0;
407 }
408
409 hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
410 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE,
411 LE_SCAN_FILTER_DUP_ENABLE);
412}
413
414static int le_scan_restart_sync(struct hci_dev *hdev, void *data)
415{
416 return hci_le_scan_restart_sync(hdev);
417}
418
419static void le_scan_restart(struct work_struct *work)
420{
421 struct hci_dev *hdev = container_of(work, struct hci_dev,
422 le_scan_restart.work);
423 unsigned long timeout, duration, scan_start, now;
424 int status;
425
426 bt_dev_dbg(hdev, "");
427
428 hci_dev_lock(hdev);
429
430 status = hci_cmd_sync_queue(hdev, le_scan_restart_sync, NULL, NULL);
431 if (status) {
432 bt_dev_err(hdev, "failed to restart LE scan: status %d",
433 status);
434 goto unlock;
435 }
436
437 if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
438 !hdev->discovery.scan_start)
439 goto unlock;
440
441 /* When the scan was started, hdev->le_scan_disable has been queued
442 * after duration from scan_start. During scan restart this job
443 * has been canceled, and we need to queue it again after proper
444 * timeout, to make sure that scan does not run indefinitely.
445 */
446 duration = hdev->discovery.scan_duration;
447 scan_start = hdev->discovery.scan_start;
448 now = jiffies;
449 if (now - scan_start <= duration) {
450 int elapsed;
451
452 if (now >= scan_start)
453 elapsed = now - scan_start;
454 else
455 elapsed = ULONG_MAX - scan_start + now;
456
457 timeout = duration - elapsed;
458 } else {
459 timeout = 0;
460 }
461
462 queue_delayed_work(hdev->req_workqueue,
463 &hdev->le_scan_disable, timeout);
464
465unlock:
466 hci_dev_unlock(hdev);
467}
468
469static int reenable_adv_sync(struct hci_dev *hdev, void *data)
470{
471 bt_dev_dbg(hdev, "");
472
473 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
474 list_empty(&hdev->adv_instances))
475 return 0;
476
477 if (hdev->cur_adv_instance) {
478 return hci_schedule_adv_instance_sync(hdev,
479 hdev->cur_adv_instance,
480 true);
481 } else {
482 if (ext_adv_capable(hdev)) {
483 hci_start_ext_adv_sync(hdev, 0x00);
484 } else {
485 hci_update_adv_data_sync(hdev, 0x00);
486 hci_update_scan_rsp_data_sync(hdev, 0x00);
487 hci_enable_advertising_sync(hdev);
488 }
489 }
490
491 return 0;
492}
493
494static void reenable_adv(struct work_struct *work)
495{
496 struct hci_dev *hdev = container_of(work, struct hci_dev,
497 reenable_adv_work);
498 int status;
499
500 bt_dev_dbg(hdev, "");
501
502 hci_dev_lock(hdev);
503
504 status = hci_cmd_sync_queue(hdev, reenable_adv_sync, NULL, NULL);
505 if (status)
506 bt_dev_err(hdev, "failed to reenable ADV: %d", status);
507
508 hci_dev_unlock(hdev);
509}
510
511static void cancel_adv_timeout(struct hci_dev *hdev)
512{
513 if (hdev->adv_instance_timeout) {
514 hdev->adv_instance_timeout = 0;
515 cancel_delayed_work(&hdev->adv_instance_expire);
516 }
517}
518
519/* For a single instance:
520 * - force == true: The instance will be removed even when its remaining
521 * lifetime is not zero.
522 * - force == false: the instance will be deactivated but kept stored unless
523 * the remaining lifetime is zero.
524 *
525 * For instance == 0x00:
526 * - force == true: All instances will be removed regardless of their timeout
527 * setting.
528 * - force == false: Only instances that have a timeout will be removed.
529 */
530int hci_clear_adv_instance_sync(struct hci_dev *hdev, struct sock *sk,
531 u8 instance, bool force)
532{
533 struct adv_info *adv_instance, *n, *next_instance = NULL;
534 int err;
535 u8 rem_inst;
536
537 /* Cancel any timeout concerning the removed instance(s). */
538 if (!instance || hdev->cur_adv_instance == instance)
539 cancel_adv_timeout(hdev);
540
541 /* Get the next instance to advertise BEFORE we remove
542 * the current one. This can be the same instance again
543 * if there is only one instance.
544 */
545 if (instance && hdev->cur_adv_instance == instance)
546 next_instance = hci_get_next_instance(hdev, instance);
547
548 if (instance == 0x00) {
549 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances,
550 list) {
551 if (!(force || adv_instance->timeout))
552 continue;
553
554 rem_inst = adv_instance->instance;
555 err = hci_remove_adv_instance(hdev, rem_inst);
556 if (!err)
557 mgmt_advertising_removed(sk, hdev, rem_inst);
558 }
559 } else {
560 adv_instance = hci_find_adv_instance(hdev, instance);
561
562 if (force || (adv_instance && adv_instance->timeout &&
563 !adv_instance->remaining_time)) {
564 /* Don't advertise a removed instance. */
565 if (next_instance &&
566 next_instance->instance == instance)
567 next_instance = NULL;
568
569 err = hci_remove_adv_instance(hdev, instance);
570 if (!err)
571 mgmt_advertising_removed(sk, hdev, instance);
572 }
573 }
574
575 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
576 return 0;
577
578 if (next_instance && !ext_adv_capable(hdev))
579 return hci_schedule_adv_instance_sync(hdev,
580 next_instance->instance,
581 false);
582
583 return 0;
584}
585
586static int adv_timeout_expire_sync(struct hci_dev *hdev, void *data)
587{
588 u8 instance = *(u8 *)data;
589
590 kfree(data);
591
592 hci_clear_adv_instance_sync(hdev, NULL, instance, false);
593
594 if (list_empty(&hdev->adv_instances))
595 return hci_disable_advertising_sync(hdev);
596
597 return 0;
598}
599
600static void adv_timeout_expire(struct work_struct *work)
601{
602 u8 *inst_ptr;
603 struct hci_dev *hdev = container_of(work, struct hci_dev,
604 adv_instance_expire.work);
605
606 bt_dev_dbg(hdev, "");
607
608 hci_dev_lock(hdev);
609
610 hdev->adv_instance_timeout = 0;
611
612 if (hdev->cur_adv_instance == 0x00)
613 goto unlock;
614
615 inst_ptr = kmalloc(1, GFP_KERNEL);
616 if (!inst_ptr)
617 goto unlock;
618
619 *inst_ptr = hdev->cur_adv_instance;
620 hci_cmd_sync_queue(hdev, adv_timeout_expire_sync, inst_ptr, NULL);
621
622unlock:
623 hci_dev_unlock(hdev);
624}
625
626void hci_cmd_sync_init(struct hci_dev *hdev)
627{
628 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
629 INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
630 mutex_init(&hdev->cmd_sync_work_lock);
631
632 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
633 INIT_WORK(&hdev->reenable_adv_work, reenable_adv);
634 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable);
635 INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart);
636 INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
637}
638
639void hci_cmd_sync_clear(struct hci_dev *hdev)
640{
641 struct hci_cmd_sync_work_entry *entry, *tmp;
642
643 cancel_work_sync(&hdev->cmd_sync_work);
644 cancel_work_sync(&hdev->reenable_adv_work);
645
646 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
647 if (entry->destroy)
648 entry->destroy(hdev, entry->data, -ECANCELED);
649
650 list_del(&entry->list);
651 kfree(entry);
652 }
653}
654
655void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
656{
657 bt_dev_dbg(hdev, "err 0x%2.2x", err);
658
659 if (hdev->req_status == HCI_REQ_PEND) {
660 hdev->req_result = err;
661 hdev->req_status = HCI_REQ_CANCELED;
662
663 cancel_delayed_work_sync(&hdev->cmd_timer);
664 cancel_delayed_work_sync(&hdev->ncmd_timer);
665 atomic_set(&hdev->cmd_cnt, 1);
666
667 wake_up_interruptible(&hdev->req_wait_q);
668 }
669}
670
671void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
672{
673 bt_dev_dbg(hdev, "err 0x%2.2x", err);
674
675 if (hdev->req_status == HCI_REQ_PEND) {
676 hdev->req_result = err;
677 hdev->req_status = HCI_REQ_CANCELED;
678
679 queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
680 }
681}
682EXPORT_SYMBOL(hci_cmd_sync_cancel);
683
684int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
685 void *data, hci_cmd_sync_work_destroy_t destroy)
686{
687 struct hci_cmd_sync_work_entry *entry;
688
689 if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
690 return -ENODEV;
691
692 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
693 if (!entry)
694 return -ENOMEM;
695
696 entry->func = func;
697 entry->data = data;
698 entry->destroy = destroy;
699
700 mutex_lock(&hdev->cmd_sync_work_lock);
701 list_add_tail(&entry->list, &hdev->cmd_sync_work_list);
702 mutex_unlock(&hdev->cmd_sync_work_lock);
703
704 queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
705
706 return 0;
707}
708EXPORT_SYMBOL(hci_cmd_sync_queue);
709
710int hci_update_eir_sync(struct hci_dev *hdev)
711{
712 struct hci_cp_write_eir cp;
713
714 bt_dev_dbg(hdev, "");
715
716 if (!hdev_is_powered(hdev))
717 return 0;
718
719 if (!lmp_ext_inq_capable(hdev))
720 return 0;
721
722 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
723 return 0;
724
725 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
726 return 0;
727
728 memset(&cp, 0, sizeof(cp));
729
730 eir_create(hdev, cp.data);
731
732 if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
733 return 0;
734
735 memcpy(hdev->eir, cp.data, sizeof(cp.data));
736
737 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
738 HCI_CMD_TIMEOUT);
739}
740
741static u8 get_service_classes(struct hci_dev *hdev)
742{
743 struct bt_uuid *uuid;
744 u8 val = 0;
745
746 list_for_each_entry(uuid, &hdev->uuids, list)
747 val |= uuid->svc_hint;
748
749 return val;
750}
751
752int hci_update_class_sync(struct hci_dev *hdev)
753{
754 u8 cod[3];
755
756 bt_dev_dbg(hdev, "");
757
758 if (!hdev_is_powered(hdev))
759 return 0;
760
761 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
762 return 0;
763
764 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
765 return 0;
766
767 cod[0] = hdev->minor_class;
768 cod[1] = hdev->major_class;
769 cod[2] = get_service_classes(hdev);
770
771 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
772 cod[1] |= 0x20;
773
774 if (memcmp(cod, hdev->dev_class, 3) == 0)
775 return 0;
776
777 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
778 sizeof(cod), cod, HCI_CMD_TIMEOUT);
779}
780
781static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
782{
783 /* If there is no connection we are OK to advertise. */
784 if (hci_conn_num(hdev, LE_LINK) == 0)
785 return true;
786
787 /* Check le_states if there is any connection in peripheral role. */
788 if (hdev->conn_hash.le_num_peripheral > 0) {
789 /* Peripheral connection state and non connectable mode
790 * bit 20.
791 */
792 if (!connectable && !(hdev->le_states[2] & 0x10))
793 return false;
794
795 /* Peripheral connection state and connectable mode bit 38
796 * and scannable bit 21.
797 */
798 if (connectable && (!(hdev->le_states[4] & 0x40) ||
799 !(hdev->le_states[2] & 0x20)))
800 return false;
801 }
802
803 /* Check le_states if there is any connection in central role. */
804 if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
805 /* Central connection state and non connectable mode bit 18. */
806 if (!connectable && !(hdev->le_states[2] & 0x02))
807 return false;
808
809 /* Central connection state and connectable mode bit 35 and
810 * scannable 19.
811 */
812 if (connectable && (!(hdev->le_states[4] & 0x08) ||
813 !(hdev->le_states[2] & 0x08)))
814 return false;
815 }
816
817 return true;
818}
819
820static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
821{
822 /* If privacy is not enabled don't use RPA */
823 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
824 return false;
825
826 /* If basic privacy mode is enabled use RPA */
827 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
828 return true;
829
830 /* If limited privacy mode is enabled don't use RPA if we're
831 * both discoverable and bondable.
832 */
833 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
834 hci_dev_test_flag(hdev, HCI_BONDABLE))
835 return false;
836
837 /* We're neither bondable nor discoverable in the limited
838 * privacy mode, therefore use RPA.
839 */
840 return true;
841}
842
843static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
844{
845 /* If we're advertising or initiating an LE connection we can't
846 * go ahead and change the random address at this time. This is
847 * because the eventual initiator address used for the
848 * subsequently created connection will be undefined (some
849 * controllers use the new address and others the one we had
850 * when the operation started).
851 *
852 * In this kind of scenario skip the update and let the random
853 * address be updated at the next cycle.
854 */
855 if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
856 hci_lookup_le_connect(hdev)) {
857 bt_dev_dbg(hdev, "Deferring random address update");
858 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
859 return 0;
860 }
861
862 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
863 6, rpa, HCI_CMD_TIMEOUT);
864}
865
866int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
867 bool rpa, u8 *own_addr_type)
868{
869 int err;
870
871 /* If privacy is enabled use a resolvable private address. If
872 * current RPA has expired or there is something else than
873 * the current RPA in use, then generate a new one.
874 */
875 if (rpa) {
876 /* If Controller supports LL Privacy use own address type is
877 * 0x03
878 */
879 if (use_ll_privacy(hdev))
880 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
881 else
882 *own_addr_type = ADDR_LE_DEV_RANDOM;
883
884 /* Check if RPA is valid */
885 if (rpa_valid(hdev))
886 return 0;
887
888 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
889 if (err < 0) {
890 bt_dev_err(hdev, "failed to generate new RPA");
891 return err;
892 }
893
894 err = hci_set_random_addr_sync(hdev, &hdev->rpa);
895 if (err)
896 return err;
897
898 return 0;
899 }
900
901 /* In case of required privacy without resolvable private address,
902 * use an non-resolvable private address. This is useful for active
903 * scanning and non-connectable advertising.
904 */
905 if (require_privacy) {
906 bdaddr_t nrpa;
907
908 while (true) {
909 /* The non-resolvable private address is generated
910 * from random six bytes with the two most significant
911 * bits cleared.
912 */
913 get_random_bytes(&nrpa, 6);
914 nrpa.b[5] &= 0x3f;
915
916 /* The non-resolvable private address shall not be
917 * equal to the public address.
918 */
919 if (bacmp(&hdev->bdaddr, &nrpa))
920 break;
921 }
922
923 *own_addr_type = ADDR_LE_DEV_RANDOM;
924
925 return hci_set_random_addr_sync(hdev, &nrpa);
926 }
927
928 /* If forcing static address is in use or there is no public
929 * address use the static address as random address (but skip
930 * the HCI command if the current random address is already the
931 * static one.
932 *
933 * In case BR/EDR has been disabled on a dual-mode controller
934 * and a static address has been configured, then use that
935 * address instead of the public BR/EDR address.
936 */
937 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
938 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
939 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
940 bacmp(&hdev->static_addr, BDADDR_ANY))) {
941 *own_addr_type = ADDR_LE_DEV_RANDOM;
942 if (bacmp(&hdev->static_addr, &hdev->random_addr))
943 return hci_set_random_addr_sync(hdev,
944 &hdev->static_addr);
945 return 0;
946 }
947
948 /* Neither privacy nor static address is being used so use a
949 * public address.
950 */
951 *own_addr_type = ADDR_LE_DEV_PUBLIC;
952
953 return 0;
954}
955
956static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
957{
958 struct hci_cp_le_set_ext_adv_enable *cp;
959 struct hci_cp_ext_adv_set *set;
960 u8 data[sizeof(*cp) + sizeof(*set) * 1];
961 u8 size;
962
963 /* If request specifies an instance that doesn't exist, fail */
964 if (instance > 0) {
965 struct adv_info *adv;
966
967 adv = hci_find_adv_instance(hdev, instance);
968 if (!adv)
969 return -EINVAL;
970
971 /* If not enabled there is nothing to do */
972 if (!adv->enabled)
973 return 0;
974 }
975
976 memset(data, 0, sizeof(data));
977
978 cp = (void *)data;
979 set = (void *)cp->data;
980
981 /* Instance 0x00 indicates all advertising instances will be disabled */
982 cp->num_of_sets = !!instance;
983 cp->enable = 0x00;
984
985 set->handle = instance;
986
987 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
988
989 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
990 size, data, HCI_CMD_TIMEOUT);
991}
992
993static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
994 bdaddr_t *random_addr)
995{
996 struct hci_cp_le_set_adv_set_rand_addr cp;
997 int err;
998
999 if (!instance) {
1000 /* Instance 0x00 doesn't have an adv_info, instead it uses
1001 * hdev->random_addr to track its address so whenever it needs
1002 * to be updated this also set the random address since
1003 * hdev->random_addr is shared with scan state machine.
1004 */
1005 err = hci_set_random_addr_sync(hdev, random_addr);
1006 if (err)
1007 return err;
1008 }
1009
1010 memset(&cp, 0, sizeof(cp));
1011
1012 cp.handle = instance;
1013 bacpy(&cp.bdaddr, random_addr);
1014
1015 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
1016 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1017}
1018
1019int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1020{
1021 struct hci_cp_le_set_ext_adv_params cp;
1022 bool connectable;
1023 u32 flags;
1024 bdaddr_t random_addr;
1025 u8 own_addr_type;
1026 int err;
1027 struct adv_info *adv;
1028 bool secondary_adv;
1029
1030 if (instance > 0) {
1031 adv = hci_find_adv_instance(hdev, instance);
1032 if (!adv)
1033 return -EINVAL;
1034 } else {
1035 adv = NULL;
1036 }
1037
1038 /* Updating parameters of an active instance will return a
1039 * Command Disallowed error, so we must first disable the
1040 * instance if it is active.
1041 */
1042 if (adv && !adv->pending) {
1043 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1044 if (err)
1045 return err;
1046 }
1047
1048 flags = hci_adv_instance_flags(hdev, instance);
1049
1050 /* If the "connectable" instance flag was not set, then choose between
1051 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1052 */
1053 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1054 mgmt_get_connectable(hdev);
1055
1056 if (!is_advertising_allowed(hdev, connectable))
1057 return -EPERM;
1058
1059 /* Set require_privacy to true only when non-connectable
1060 * advertising is used. In that case it is fine to use a
1061 * non-resolvable private address.
1062 */
1063 err = hci_get_random_address(hdev, !connectable,
1064 adv_use_rpa(hdev, flags), adv,
1065 &own_addr_type, &random_addr);
1066 if (err < 0)
1067 return err;
1068
1069 memset(&cp, 0, sizeof(cp));
1070
1071 if (adv) {
1072 hci_cpu_to_le24(adv->min_interval, cp.min_interval);
1073 hci_cpu_to_le24(adv->max_interval, cp.max_interval);
1074 cp.tx_power = adv->tx_power;
1075 } else {
1076 hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
1077 hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
1078 cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
1079 }
1080
1081 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
1082
1083 if (connectable) {
1084 if (secondary_adv)
1085 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
1086 else
1087 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
1088 } else if (hci_adv_instance_is_scannable(hdev, instance) ||
1089 (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
1090 if (secondary_adv)
1091 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
1092 else
1093 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
1094 } else {
1095 if (secondary_adv)
1096 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
1097 else
1098 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
1099 }
1100
1101 /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
1102 * contains the peer’s Identity Address and the Peer_Address_Type
1103 * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
1104 * These parameters are used to locate the corresponding local IRK in
1105 * the resolving list; this IRK is used to generate their own address
1106 * used in the advertisement.
1107 */
1108 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
1109 hci_copy_identity_address(hdev, &cp.peer_addr,
1110 &cp.peer_addr_type);
1111
1112 cp.own_addr_type = own_addr_type;
1113 cp.channel_map = hdev->le_adv_channel_map;
1114 cp.handle = instance;
1115
1116 if (flags & MGMT_ADV_FLAG_SEC_2M) {
1117 cp.primary_phy = HCI_ADV_PHY_1M;
1118 cp.secondary_phy = HCI_ADV_PHY_2M;
1119 } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
1120 cp.primary_phy = HCI_ADV_PHY_CODED;
1121 cp.secondary_phy = HCI_ADV_PHY_CODED;
1122 } else {
1123 /* In all other cases use 1M */
1124 cp.primary_phy = HCI_ADV_PHY_1M;
1125 cp.secondary_phy = HCI_ADV_PHY_1M;
1126 }
1127
1128 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
1129 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1130 if (err)
1131 return err;
1132
1133 if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
1134 own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
1135 bacmp(&random_addr, BDADDR_ANY)) {
1136 /* Check if random address need to be updated */
1137 if (adv) {
1138 if (!bacmp(&random_addr, &adv->random_addr))
1139 return 0;
1140 } else {
1141 if (!bacmp(&random_addr, &hdev->random_addr))
1142 return 0;
1143 }
1144
1145 return hci_set_adv_set_random_addr_sync(hdev, instance,
1146 &random_addr);
1147 }
1148
1149 return 0;
1150}
1151
1152static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1153{
1154 struct {
1155 struct hci_cp_le_set_ext_scan_rsp_data cp;
1156 u8 data[HCI_MAX_EXT_AD_LENGTH];
1157 } pdu;
1158 u8 len;
1159 struct adv_info *adv = NULL;
1160 int err;
1161
1162 memset(&pdu, 0, sizeof(pdu));
1163
1164 if (instance) {
1165 adv = hci_find_adv_instance(hdev, instance);
1166 if (!adv || !adv->scan_rsp_changed)
1167 return 0;
1168 }
1169
1170 len = eir_create_scan_rsp(hdev, instance, pdu.data);
1171
1172 pdu.cp.handle = instance;
1173 pdu.cp.length = len;
1174 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1175 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1176
1177 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
1178 sizeof(pdu.cp) + len, &pdu.cp,
1179 HCI_CMD_TIMEOUT);
1180 if (err)
1181 return err;
1182
1183 if (adv) {
1184 adv->scan_rsp_changed = false;
1185 } else {
1186 memcpy(hdev->scan_rsp_data, pdu.data, len);
1187 hdev->scan_rsp_data_len = len;
1188 }
1189
1190 return 0;
1191}
1192
1193static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1194{
1195 struct hci_cp_le_set_scan_rsp_data cp;
1196 u8 len;
1197
1198 memset(&cp, 0, sizeof(cp));
1199
1200 len = eir_create_scan_rsp(hdev, instance, cp.data);
1201
1202 if (hdev->scan_rsp_data_len == len &&
1203 !memcmp(cp.data, hdev->scan_rsp_data, len))
1204 return 0;
1205
1206 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
1207 hdev->scan_rsp_data_len = len;
1208
1209 cp.length = len;
1210
1211 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
1212 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1213}
1214
1215int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1216{
1217 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1218 return 0;
1219
1220 if (ext_adv_capable(hdev))
1221 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
1222
1223 return __hci_set_scan_rsp_data_sync(hdev, instance);
1224}
1225
1226int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
1227{
1228 struct hci_cp_le_set_ext_adv_enable *cp;
1229 struct hci_cp_ext_adv_set *set;
1230 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1231 struct adv_info *adv;
1232
1233 if (instance > 0) {
1234 adv = hci_find_adv_instance(hdev, instance);
1235 if (!adv)
1236 return -EINVAL;
1237 /* If already enabled there is nothing to do */
1238 if (adv->enabled)
1239 return 0;
1240 } else {
1241 adv = NULL;
1242 }
1243
1244 cp = (void *)data;
1245 set = (void *)cp->data;
1246
1247 memset(cp, 0, sizeof(*cp));
1248
1249 cp->enable = 0x01;
1250 cp->num_of_sets = 0x01;
1251
1252 memset(set, 0, sizeof(*set));
1253
1254 set->handle = instance;
1255
1256 /* Set duration per instance since controller is responsible for
1257 * scheduling it.
1258 */
1259 if (adv && adv->timeout) {
1260 u16 duration = adv->timeout * MSEC_PER_SEC;
1261
1262 /* Time = N * 10 ms */
1263 set->duration = cpu_to_le16(duration / 10);
1264 }
1265
1266 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1267 sizeof(*cp) +
1268 sizeof(*set) * cp->num_of_sets,
1269 data, HCI_CMD_TIMEOUT);
1270}
1271
1272int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
1273{
1274 int err;
1275
1276 err = hci_setup_ext_adv_instance_sync(hdev, instance);
1277 if (err)
1278 return err;
1279
1280 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
1281 if (err)
1282 return err;
1283
1284 return hci_enable_ext_advertising_sync(hdev, instance);
1285}
1286
1287static int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1288{
1289 struct hci_cp_le_set_per_adv_enable cp;
1290
1291 /* If periodic advertising already disabled there is nothing to do. */
1292 if (!hci_dev_test_flag(hdev, HCI_LE_PER_ADV))
1293 return 0;
1294
1295 memset(&cp, 0, sizeof(cp));
1296
1297 cp.enable = 0x00;
1298 cp.handle = instance;
1299
1300 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1301 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1302}
1303
1304static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance,
1305 u16 min_interval, u16 max_interval)
1306{
1307 struct hci_cp_le_set_per_adv_params cp;
1308
1309 memset(&cp, 0, sizeof(cp));
1310
1311 if (!min_interval)
1312 min_interval = DISCOV_LE_PER_ADV_INT_MIN;
1313
1314 if (!max_interval)
1315 max_interval = DISCOV_LE_PER_ADV_INT_MAX;
1316
1317 cp.handle = instance;
1318 cp.min_interval = cpu_to_le16(min_interval);
1319 cp.max_interval = cpu_to_le16(max_interval);
1320 cp.periodic_properties = 0x0000;
1321
1322 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS,
1323 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1324}
1325
1326static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance)
1327{
1328 struct {
1329 struct hci_cp_le_set_per_adv_data cp;
1330 u8 data[HCI_MAX_PER_AD_LENGTH];
1331 } pdu;
1332 u8 len;
1333
1334 memset(&pdu, 0, sizeof(pdu));
1335
1336 if (instance) {
1337 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1338
1339 if (!adv || !adv->periodic)
1340 return 0;
1341 }
1342
1343 len = eir_create_per_adv_data(hdev, instance, pdu.data);
1344
1345 pdu.cp.length = len;
1346 pdu.cp.handle = instance;
1347 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1348
1349 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA,
1350 sizeof(pdu.cp) + len, &pdu,
1351 HCI_CMD_TIMEOUT);
1352}
1353
1354static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1355{
1356 struct hci_cp_le_set_per_adv_enable cp;
1357
1358 /* If periodic advertising already enabled there is nothing to do. */
1359 if (hci_dev_test_flag(hdev, HCI_LE_PER_ADV))
1360 return 0;
1361
1362 memset(&cp, 0, sizeof(cp));
1363
1364 cp.enable = 0x01;
1365 cp.handle = instance;
1366
1367 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1368 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1369}
1370
1371/* Checks if periodic advertising data contains a Basic Announcement and if it
1372 * does generates a Broadcast ID and add Broadcast Announcement.
1373 */
1374static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv)
1375{
1376 u8 bid[3];
1377 u8 ad[4 + 3];
1378
1379 /* Skip if NULL adv as instance 0x00 is used for general purpose
1380 * advertising so it cannot used for the likes of Broadcast Announcement
1381 * as it can be overwritten at any point.
1382 */
1383 if (!adv)
1384 return 0;
1385
1386 /* Check if PA data doesn't contains a Basic Audio Announcement then
1387 * there is nothing to do.
1388 */
1389 if (!eir_get_service_data(adv->per_adv_data, adv->per_adv_data_len,
1390 0x1851, NULL))
1391 return 0;
1392
1393 /* Check if advertising data already has a Broadcast Announcement since
1394 * the process may want to control the Broadcast ID directly and in that
1395 * case the kernel shall no interfere.
1396 */
1397 if (eir_get_service_data(adv->adv_data, adv->adv_data_len, 0x1852,
1398 NULL))
1399 return 0;
1400
1401 /* Generate Broadcast ID */
1402 get_random_bytes(bid, sizeof(bid));
1403 eir_append_service_data(ad, 0, 0x1852, bid, sizeof(bid));
1404 hci_set_adv_instance_data(hdev, adv->instance, sizeof(ad), ad, 0, NULL);
1405
1406 return hci_update_adv_data_sync(hdev, adv->instance);
1407}
1408
1409int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len,
1410 u8 *data, u32 flags, u16 min_interval,
1411 u16 max_interval, u16 sync_interval)
1412{
1413 struct adv_info *adv = NULL;
1414 int err;
1415 bool added = false;
1416
1417 hci_disable_per_advertising_sync(hdev, instance);
1418
1419 if (instance) {
1420 adv = hci_find_adv_instance(hdev, instance);
1421 /* Create an instance if that could not be found */
1422 if (!adv) {
1423 adv = hci_add_per_instance(hdev, instance, flags,
1424 data_len, data,
1425 sync_interval,
1426 sync_interval);
1427 if (IS_ERR(adv))
1428 return PTR_ERR(adv);
1429 added = true;
1430 }
1431 }
1432
1433 /* Only start advertising if instance 0 or if a dedicated instance has
1434 * been added.
1435 */
1436 if (!adv || added) {
1437 err = hci_start_ext_adv_sync(hdev, instance);
1438 if (err < 0)
1439 goto fail;
1440
1441 err = hci_adv_bcast_annoucement(hdev, adv);
1442 if (err < 0)
1443 goto fail;
1444 }
1445
1446 err = hci_set_per_adv_params_sync(hdev, instance, min_interval,
1447 max_interval);
1448 if (err < 0)
1449 goto fail;
1450
1451 err = hci_set_per_adv_data_sync(hdev, instance);
1452 if (err < 0)
1453 goto fail;
1454
1455 err = hci_enable_per_advertising_sync(hdev, instance);
1456 if (err < 0)
1457 goto fail;
1458
1459 return 0;
1460
1461fail:
1462 if (added)
1463 hci_remove_adv_instance(hdev, instance);
1464
1465 return err;
1466}
1467
1468static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
1469{
1470 int err;
1471
1472 if (ext_adv_capable(hdev))
1473 return hci_start_ext_adv_sync(hdev, instance);
1474
1475 err = hci_update_adv_data_sync(hdev, instance);
1476 if (err)
1477 return err;
1478
1479 err = hci_update_scan_rsp_data_sync(hdev, instance);
1480 if (err)
1481 return err;
1482
1483 return hci_enable_advertising_sync(hdev);
1484}
1485
1486int hci_enable_advertising_sync(struct hci_dev *hdev)
1487{
1488 struct adv_info *adv_instance;
1489 struct hci_cp_le_set_adv_param cp;
1490 u8 own_addr_type, enable = 0x01;
1491 bool connectable;
1492 u16 adv_min_interval, adv_max_interval;
1493 u32 flags;
1494 u8 status;
1495
1496 if (ext_adv_capable(hdev))
1497 return hci_enable_ext_advertising_sync(hdev,
1498 hdev->cur_adv_instance);
1499
1500 flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
1501 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
1502
1503 /* If the "connectable" instance flag was not set, then choose between
1504 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1505 */
1506 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1507 mgmt_get_connectable(hdev);
1508
1509 if (!is_advertising_allowed(hdev, connectable))
1510 return -EINVAL;
1511
1512 status = hci_disable_advertising_sync(hdev);
1513 if (status)
1514 return status;
1515
1516 /* Clear the HCI_LE_ADV bit temporarily so that the
1517 * hci_update_random_address knows that it's safe to go ahead
1518 * and write a new random address. The flag will be set back on
1519 * as soon as the SET_ADV_ENABLE HCI command completes.
1520 */
1521 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1522
1523 /* Set require_privacy to true only when non-connectable
1524 * advertising is used. In that case it is fine to use a
1525 * non-resolvable private address.
1526 */
1527 status = hci_update_random_address_sync(hdev, !connectable,
1528 adv_use_rpa(hdev, flags),
1529 &own_addr_type);
1530 if (status)
1531 return status;
1532
1533 memset(&cp, 0, sizeof(cp));
1534
1535 if (adv_instance) {
1536 adv_min_interval = adv_instance->min_interval;
1537 adv_max_interval = adv_instance->max_interval;
1538 } else {
1539 adv_min_interval = hdev->le_adv_min_interval;
1540 adv_max_interval = hdev->le_adv_max_interval;
1541 }
1542
1543 if (connectable) {
1544 cp.type = LE_ADV_IND;
1545 } else {
1546 if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
1547 cp.type = LE_ADV_SCAN_IND;
1548 else
1549 cp.type = LE_ADV_NONCONN_IND;
1550
1551 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1552 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
1553 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
1554 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
1555 }
1556 }
1557
1558 cp.min_interval = cpu_to_le16(adv_min_interval);
1559 cp.max_interval = cpu_to_le16(adv_max_interval);
1560 cp.own_address_type = own_addr_type;
1561 cp.channel_map = hdev->le_adv_channel_map;
1562
1563 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
1564 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1565 if (status)
1566 return status;
1567
1568 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1569 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1570}
1571
1572static int enable_advertising_sync(struct hci_dev *hdev, void *data)
1573{
1574 return hci_enable_advertising_sync(hdev);
1575}
1576
1577int hci_enable_advertising(struct hci_dev *hdev)
1578{
1579 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
1580 list_empty(&hdev->adv_instances))
1581 return 0;
1582
1583 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
1584}
1585
1586int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1587 struct sock *sk)
1588{
1589 int err;
1590
1591 if (!ext_adv_capable(hdev))
1592 return 0;
1593
1594 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1595 if (err)
1596 return err;
1597
1598 /* If request specifies an instance that doesn't exist, fail */
1599 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
1600 return -EINVAL;
1601
1602 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
1603 sizeof(instance), &instance, 0,
1604 HCI_CMD_TIMEOUT, sk);
1605}
1606
1607static int remove_ext_adv_sync(struct hci_dev *hdev, void *data)
1608{
1609 struct adv_info *adv = data;
1610 u8 instance = 0;
1611
1612 if (adv)
1613 instance = adv->instance;
1614
1615 return hci_remove_ext_adv_instance_sync(hdev, instance, NULL);
1616}
1617
1618int hci_remove_ext_adv_instance(struct hci_dev *hdev, u8 instance)
1619{
1620 struct adv_info *adv = NULL;
1621
1622 if (instance) {
1623 adv = hci_find_adv_instance(hdev, instance);
1624 if (!adv)
1625 return -EINVAL;
1626 }
1627
1628 return hci_cmd_sync_queue(hdev, remove_ext_adv_sync, adv, NULL);
1629}
1630
1631int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason)
1632{
1633 struct hci_cp_le_term_big cp;
1634
1635 memset(&cp, 0, sizeof(cp));
1636 cp.handle = handle;
1637 cp.reason = reason;
1638
1639 return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG,
1640 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1641}
1642
1643static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1644{
1645 struct {
1646 struct hci_cp_le_set_ext_adv_data cp;
1647 u8 data[HCI_MAX_EXT_AD_LENGTH];
1648 } pdu;
1649 u8 len;
1650 struct adv_info *adv = NULL;
1651 int err;
1652
1653 memset(&pdu, 0, sizeof(pdu));
1654
1655 if (instance) {
1656 adv = hci_find_adv_instance(hdev, instance);
1657 if (!adv || !adv->adv_data_changed)
1658 return 0;
1659 }
1660
1661 len = eir_create_adv_data(hdev, instance, pdu.data);
1662
1663 pdu.cp.length = len;
1664 pdu.cp.handle = instance;
1665 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1666 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1667
1668 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1669 sizeof(pdu.cp) + len, &pdu.cp,
1670 HCI_CMD_TIMEOUT);
1671 if (err)
1672 return err;
1673
1674 /* Update data if the command succeed */
1675 if (adv) {
1676 adv->adv_data_changed = false;
1677 } else {
1678 memcpy(hdev->adv_data, pdu.data, len);
1679 hdev->adv_data_len = len;
1680 }
1681
1682 return 0;
1683}
1684
1685static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1686{
1687 struct hci_cp_le_set_adv_data cp;
1688 u8 len;
1689
1690 memset(&cp, 0, sizeof(cp));
1691
1692 len = eir_create_adv_data(hdev, instance, cp.data);
1693
1694 /* There's nothing to do if the data hasn't changed */
1695 if (hdev->adv_data_len == len &&
1696 memcmp(cp.data, hdev->adv_data, len) == 0)
1697 return 0;
1698
1699 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1700 hdev->adv_data_len = len;
1701
1702 cp.length = len;
1703
1704 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1705 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1706}
1707
1708int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1709{
1710 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1711 return 0;
1712
1713 if (ext_adv_capable(hdev))
1714 return hci_set_ext_adv_data_sync(hdev, instance);
1715
1716 return hci_set_adv_data_sync(hdev, instance);
1717}
1718
1719int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1720 bool force)
1721{
1722 struct adv_info *adv = NULL;
1723 u16 timeout;
1724
1725 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
1726 return -EPERM;
1727
1728 if (hdev->adv_instance_timeout)
1729 return -EBUSY;
1730
1731 adv = hci_find_adv_instance(hdev, instance);
1732 if (!adv)
1733 return -ENOENT;
1734
1735 /* A zero timeout means unlimited advertising. As long as there is
1736 * only one instance, duration should be ignored. We still set a timeout
1737 * in case further instances are being added later on.
1738 *
1739 * If the remaining lifetime of the instance is more than the duration
1740 * then the timeout corresponds to the duration, otherwise it will be
1741 * reduced to the remaining instance lifetime.
1742 */
1743 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
1744 timeout = adv->duration;
1745 else
1746 timeout = adv->remaining_time;
1747
1748 /* The remaining time is being reduced unless the instance is being
1749 * advertised without time limit.
1750 */
1751 if (adv->timeout)
1752 adv->remaining_time = adv->remaining_time - timeout;
1753
1754 /* Only use work for scheduling instances with legacy advertising */
1755 if (!ext_adv_capable(hdev)) {
1756 hdev->adv_instance_timeout = timeout;
1757 queue_delayed_work(hdev->req_workqueue,
1758 &hdev->adv_instance_expire,
1759 msecs_to_jiffies(timeout * 1000));
1760 }
1761
1762 /* If we're just re-scheduling the same instance again then do not
1763 * execute any HCI commands. This happens when a single instance is
1764 * being advertised.
1765 */
1766 if (!force && hdev->cur_adv_instance == instance &&
1767 hci_dev_test_flag(hdev, HCI_LE_ADV))
1768 return 0;
1769
1770 hdev->cur_adv_instance = instance;
1771
1772 return hci_start_adv_sync(hdev, instance);
1773}
1774
1775static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
1776{
1777 int err;
1778
1779 if (!ext_adv_capable(hdev))
1780 return 0;
1781
1782 /* Disable instance 0x00 to disable all instances */
1783 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1784 if (err)
1785 return err;
1786
1787 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
1788 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1789}
1790
1791static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
1792{
1793 struct adv_info *adv, *n;
1794 int err = 0;
1795
1796 if (ext_adv_capable(hdev))
1797 /* Remove all existing sets */
1798 err = hci_clear_adv_sets_sync(hdev, sk);
1799 if (ext_adv_capable(hdev))
1800 return err;
1801
1802 /* This is safe as long as there is no command send while the lock is
1803 * held.
1804 */
1805 hci_dev_lock(hdev);
1806
1807 /* Cleanup non-ext instances */
1808 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1809 u8 instance = adv->instance;
1810 int err;
1811
1812 if (!(force || adv->timeout))
1813 continue;
1814
1815 err = hci_remove_adv_instance(hdev, instance);
1816 if (!err)
1817 mgmt_advertising_removed(sk, hdev, instance);
1818 }
1819
1820 hci_dev_unlock(hdev);
1821
1822 return 0;
1823}
1824
1825static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
1826 struct sock *sk)
1827{
1828 int err = 0;
1829
1830 /* If we use extended advertising, instance has to be removed first. */
1831 if (ext_adv_capable(hdev))
1832 err = hci_remove_ext_adv_instance_sync(hdev, instance, sk);
1833 if (ext_adv_capable(hdev))
1834 return err;
1835
1836 /* This is safe as long as there is no command send while the lock is
1837 * held.
1838 */
1839 hci_dev_lock(hdev);
1840
1841 err = hci_remove_adv_instance(hdev, instance);
1842 if (!err)
1843 mgmt_advertising_removed(sk, hdev, instance);
1844
1845 hci_dev_unlock(hdev);
1846
1847 return err;
1848}
1849
1850/* For a single instance:
1851 * - force == true: The instance will be removed even when its remaining
1852 * lifetime is not zero.
1853 * - force == false: the instance will be deactivated but kept stored unless
1854 * the remaining lifetime is zero.
1855 *
1856 * For instance == 0x00:
1857 * - force == true: All instances will be removed regardless of their timeout
1858 * setting.
1859 * - force == false: Only instances that have a timeout will be removed.
1860 */
1861int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
1862 u8 instance, bool force)
1863{
1864 struct adv_info *next = NULL;
1865 int err;
1866
1867 /* Cancel any timeout concerning the removed instance(s). */
1868 if (!instance || hdev->cur_adv_instance == instance)
1869 cancel_adv_timeout(hdev);
1870
1871 /* Get the next instance to advertise BEFORE we remove
1872 * the current one. This can be the same instance again
1873 * if there is only one instance.
1874 */
1875 if (hdev->cur_adv_instance == instance)
1876 next = hci_get_next_instance(hdev, instance);
1877
1878 if (!instance) {
1879 err = hci_clear_adv_sync(hdev, sk, force);
1880 if (err)
1881 return err;
1882 } else {
1883 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1884
1885 if (force || (adv && adv->timeout && !adv->remaining_time)) {
1886 /* Don't advertise a removed instance. */
1887 if (next && next->instance == instance)
1888 next = NULL;
1889
1890 err = hci_remove_adv_sync(hdev, instance, sk);
1891 if (err)
1892 return err;
1893 }
1894 }
1895
1896 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
1897 return 0;
1898
1899 if (next && !ext_adv_capable(hdev))
1900 hci_schedule_adv_instance_sync(hdev, next->instance, false);
1901
1902 return 0;
1903}
1904
1905int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
1906{
1907 struct hci_cp_read_rssi cp;
1908
1909 cp.handle = handle;
1910 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
1911 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1912}
1913
1914int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
1915{
1916 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
1917 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
1918}
1919
1920int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
1921{
1922 struct hci_cp_read_tx_power cp;
1923
1924 cp.handle = handle;
1925 cp.type = type;
1926 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
1927 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1928}
1929
1930int hci_disable_advertising_sync(struct hci_dev *hdev)
1931{
1932 u8 enable = 0x00;
1933 int err = 0;
1934
1935 /* If controller is not advertising we are done. */
1936 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
1937 return 0;
1938
1939 if (ext_adv_capable(hdev))
1940 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1941 if (ext_adv_capable(hdev))
1942 return err;
1943
1944 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1945 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1946}
1947
1948static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
1949 u8 filter_dup)
1950{
1951 struct hci_cp_le_set_ext_scan_enable cp;
1952
1953 memset(&cp, 0, sizeof(cp));
1954 cp.enable = val;
1955
1956 if (hci_dev_test_flag(hdev, HCI_MESH))
1957 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
1958 else
1959 cp.filter_dup = filter_dup;
1960
1961 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
1962 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1963}
1964
1965static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
1966 u8 filter_dup)
1967{
1968 struct hci_cp_le_set_scan_enable cp;
1969
1970 if (use_ext_scan(hdev))
1971 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
1972
1973 memset(&cp, 0, sizeof(cp));
1974 cp.enable = val;
1975
1976 if (val && hci_dev_test_flag(hdev, HCI_MESH))
1977 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
1978 else
1979 cp.filter_dup = filter_dup;
1980
1981 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
1982 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1983}
1984
1985static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
1986{
1987 if (!use_ll_privacy(hdev))
1988 return 0;
1989
1990 /* If controller is not/already resolving we are done. */
1991 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
1992 return 0;
1993
1994 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
1995 sizeof(val), &val, HCI_CMD_TIMEOUT);
1996}
1997
1998static int hci_scan_disable_sync(struct hci_dev *hdev)
1999{
2000 int err;
2001
2002 /* If controller is not scanning we are done. */
2003 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
2004 return 0;
2005
2006 if (hdev->scanning_paused) {
2007 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2008 return 0;
2009 }
2010
2011 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
2012 if (err) {
2013 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
2014 return err;
2015 }
2016
2017 return err;
2018}
2019
2020static bool scan_use_rpa(struct hci_dev *hdev)
2021{
2022 return hci_dev_test_flag(hdev, HCI_PRIVACY);
2023}
2024
2025static void hci_start_interleave_scan(struct hci_dev *hdev)
2026{
2027 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
2028 queue_delayed_work(hdev->req_workqueue,
2029 &hdev->interleave_scan, 0);
2030}
2031
2032static bool is_interleave_scanning(struct hci_dev *hdev)
2033{
2034 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
2035}
2036
2037static void cancel_interleave_scan(struct hci_dev *hdev)
2038{
2039 bt_dev_dbg(hdev, "cancelling interleave scan");
2040
2041 cancel_delayed_work_sync(&hdev->interleave_scan);
2042
2043 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
2044}
2045
2046/* Return true if interleave_scan wasn't started until exiting this function,
2047 * otherwise, return false
2048 */
2049static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
2050{
2051 /* Do interleaved scan only if all of the following are true:
2052 * - There is at least one ADV monitor
2053 * - At least one pending LE connection or one device to be scanned for
2054 * - Monitor offloading is not supported
2055 * If so, we should alternate between allowlist scan and one without
2056 * any filters to save power.
2057 */
2058 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
2059 !(list_empty(&hdev->pend_le_conns) &&
2060 list_empty(&hdev->pend_le_reports)) &&
2061 hci_get_adv_monitor_offload_ext(hdev) ==
2062 HCI_ADV_MONITOR_EXT_NONE;
2063 bool is_interleaving = is_interleave_scanning(hdev);
2064
2065 if (use_interleaving && !is_interleaving) {
2066 hci_start_interleave_scan(hdev);
2067 bt_dev_dbg(hdev, "starting interleave scan");
2068 return true;
2069 }
2070
2071 if (!use_interleaving && is_interleaving)
2072 cancel_interleave_scan(hdev);
2073
2074 return false;
2075}
2076
2077/* Removes connection to resolve list if needed.*/
2078static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
2079 bdaddr_t *bdaddr, u8 bdaddr_type)
2080{
2081 struct hci_cp_le_del_from_resolv_list cp;
2082 struct bdaddr_list_with_irk *entry;
2083
2084 if (!use_ll_privacy(hdev))
2085 return 0;
2086
2087 /* Check if the IRK has been programmed */
2088 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
2089 bdaddr_type);
2090 if (!entry)
2091 return 0;
2092
2093 cp.bdaddr_type = bdaddr_type;
2094 bacpy(&cp.bdaddr, bdaddr);
2095
2096 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
2097 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2098}
2099
2100static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
2101 bdaddr_t *bdaddr, u8 bdaddr_type)
2102{
2103 struct hci_cp_le_del_from_accept_list cp;
2104 int err;
2105
2106 /* Check if device is on accept list before removing it */
2107 if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
2108 return 0;
2109
2110 cp.bdaddr_type = bdaddr_type;
2111 bacpy(&cp.bdaddr, bdaddr);
2112
2113 /* Ignore errors when removing from resolving list as that is likely
2114 * that the device was never added.
2115 */
2116 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2117
2118 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
2119 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2120 if (err) {
2121 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
2122 return err;
2123 }
2124
2125 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
2126 cp.bdaddr_type);
2127
2128 return 0;
2129}
2130
2131/* Adds connection to resolve list if needed.
2132 * Setting params to NULL programs local hdev->irk
2133 */
2134static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
2135 struct hci_conn_params *params)
2136{
2137 struct hci_cp_le_add_to_resolv_list cp;
2138 struct smp_irk *irk;
2139 struct bdaddr_list_with_irk *entry;
2140
2141 if (!use_ll_privacy(hdev))
2142 return 0;
2143
2144 /* Attempt to program local identity address, type and irk if params is
2145 * NULL.
2146 */
2147 if (!params) {
2148 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
2149 return 0;
2150
2151 hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
2152 memcpy(cp.peer_irk, hdev->irk, 16);
2153 goto done;
2154 }
2155
2156 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
2157 if (!irk)
2158 return 0;
2159
2160 /* Check if the IK has _not_ been programmed yet. */
2161 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
2162 ¶ms->addr,
2163 params->addr_type);
2164 if (entry)
2165 return 0;
2166
2167 cp.bdaddr_type = params->addr_type;
2168 bacpy(&cp.bdaddr, ¶ms->addr);
2169 memcpy(cp.peer_irk, irk->val, 16);
2170
2171 /* Default privacy mode is always Network */
2172 params->privacy_mode = HCI_NETWORK_PRIVACY;
2173
2174done:
2175 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
2176 memcpy(cp.local_irk, hdev->irk, 16);
2177 else
2178 memset(cp.local_irk, 0, 16);
2179
2180 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
2181 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2182}
2183
2184/* Set Device Privacy Mode. */
2185static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
2186 struct hci_conn_params *params)
2187{
2188 struct hci_cp_le_set_privacy_mode cp;
2189 struct smp_irk *irk;
2190
2191 /* If device privacy mode has already been set there is nothing to do */
2192 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
2193 return 0;
2194
2195 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
2196 * indicates that LL Privacy has been enabled and
2197 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
2198 */
2199 if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
2200 return 0;
2201
2202 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
2203 if (!irk)
2204 return 0;
2205
2206 memset(&cp, 0, sizeof(cp));
2207 cp.bdaddr_type = irk->addr_type;
2208 bacpy(&cp.bdaddr, &irk->bdaddr);
2209 cp.mode = HCI_DEVICE_PRIVACY;
2210
2211 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
2212 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2213}
2214
2215/* Adds connection to allow list if needed, if the device uses RPA (has IRK)
2216 * this attempts to program the device in the resolving list as well and
2217 * properly set the privacy mode.
2218 */
2219static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
2220 struct hci_conn_params *params,
2221 u8 *num_entries)
2222{
2223 struct hci_cp_le_add_to_accept_list cp;
2224 int err;
2225
2226 /* During suspend, only wakeable devices can be in acceptlist */
2227 if (hdev->suspended &&
2228 !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
2229 return 0;
2230
2231 /* Select filter policy to accept all advertising */
2232 if (*num_entries >= hdev->le_accept_list_size)
2233 return -ENOSPC;
2234
2235 /* Accept list can not be used with RPAs */
2236 if (!use_ll_privacy(hdev) &&
2237 hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type))
2238 return -EINVAL;
2239
2240 /* Attempt to program the device in the resolving list first to avoid
2241 * having to rollback in case it fails since the resolving list is
2242 * dynamic it can probably be smaller than the accept list.
2243 */
2244 err = hci_le_add_resolve_list_sync(hdev, params);
2245 if (err) {
2246 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
2247 return err;
2248 }
2249
2250 /* Set Privacy Mode */
2251 err = hci_le_set_privacy_mode_sync(hdev, params);
2252 if (err) {
2253 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
2254 return err;
2255 }
2256
2257 /* Check if already in accept list */
2258 if (hci_bdaddr_list_lookup(&hdev->le_accept_list, ¶ms->addr,
2259 params->addr_type))
2260 return 0;
2261
2262 *num_entries += 1;
2263 cp.bdaddr_type = params->addr_type;
2264 bacpy(&cp.bdaddr, ¶ms->addr);
2265
2266 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
2267 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2268 if (err) {
2269 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
2270 /* Rollback the device from the resolving list */
2271 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2272 return err;
2273 }
2274
2275 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
2276 cp.bdaddr_type);
2277
2278 return 0;
2279}
2280
2281/* This function disables/pause all advertising instances */
2282static int hci_pause_advertising_sync(struct hci_dev *hdev)
2283{
2284 int err;
2285 int old_state;
2286
2287 /* If already been paused there is nothing to do. */
2288 if (hdev->advertising_paused)
2289 return 0;
2290
2291 bt_dev_dbg(hdev, "Pausing directed advertising");
2292
2293 /* Stop directed advertising */
2294 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
2295 if (old_state) {
2296 /* When discoverable timeout triggers, then just make sure
2297 * the limited discoverable flag is cleared. Even in the case
2298 * of a timeout triggered from general discoverable, it is
2299 * safe to unconditionally clear the flag.
2300 */
2301 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
2302 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
2303 hdev->discov_timeout = 0;
2304 }
2305
2306 bt_dev_dbg(hdev, "Pausing advertising instances");
2307
2308 /* Call to disable any advertisements active on the controller.
2309 * This will succeed even if no advertisements are configured.
2310 */
2311 err = hci_disable_advertising_sync(hdev);
2312 if (err)
2313 return err;
2314
2315 /* If we are using software rotation, pause the loop */
2316 if (!ext_adv_capable(hdev))
2317 cancel_adv_timeout(hdev);
2318
2319 hdev->advertising_paused = true;
2320 hdev->advertising_old_state = old_state;
2321
2322 return 0;
2323}
2324
2325/* This function enables all user advertising instances */
2326static int hci_resume_advertising_sync(struct hci_dev *hdev)
2327{
2328 struct adv_info *adv, *tmp;
2329 int err;
2330
2331 /* If advertising has not been paused there is nothing to do. */
2332 if (!hdev->advertising_paused)
2333 return 0;
2334
2335 /* Resume directed advertising */
2336 hdev->advertising_paused = false;
2337 if (hdev->advertising_old_state) {
2338 hci_dev_set_flag(hdev, HCI_ADVERTISING);
2339 hdev->advertising_old_state = 0;
2340 }
2341
2342 bt_dev_dbg(hdev, "Resuming advertising instances");
2343
2344 if (ext_adv_capable(hdev)) {
2345 /* Call for each tracked instance to be re-enabled */
2346 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
2347 err = hci_enable_ext_advertising_sync(hdev,
2348 adv->instance);
2349 if (!err)
2350 continue;
2351
2352 /* If the instance cannot be resumed remove it */
2353 hci_remove_ext_adv_instance_sync(hdev, adv->instance,
2354 NULL);
2355 }
2356 } else {
2357 /* Schedule for most recent instance to be restarted and begin
2358 * the software rotation loop
2359 */
2360 err = hci_schedule_adv_instance_sync(hdev,
2361 hdev->cur_adv_instance,
2362 true);
2363 }
2364
2365 hdev->advertising_paused = false;
2366
2367 return err;
2368}
2369
2370struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
2371 bool extended, struct sock *sk)
2372{
2373 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
2374 HCI_OP_READ_LOCAL_OOB_DATA;
2375
2376 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
2377}
2378
2379/* Device must not be scanning when updating the accept list.
2380 *
2381 * Update is done using the following sequence:
2382 *
2383 * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
2384 * Remove Devices From Accept List ->
2385 * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
2386 * Add Devices to Accept List ->
2387 * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
2388 * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
2389 * Enable Scanning
2390 *
2391 * In case of failure advertising shall be restored to its original state and
2392 * return would disable accept list since either accept or resolving list could
2393 * not be programmed.
2394 *
2395 */
2396static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
2397{
2398 struct hci_conn_params *params;
2399 struct bdaddr_list *b, *t;
2400 u8 num_entries = 0;
2401 bool pend_conn, pend_report;
2402 u8 filter_policy;
2403 int err;
2404
2405 /* Pause advertising if resolving list can be used as controllers are
2406 * cannot accept resolving list modifications while advertising.
2407 */
2408 if (use_ll_privacy(hdev)) {
2409 err = hci_pause_advertising_sync(hdev);
2410 if (err) {
2411 bt_dev_err(hdev, "pause advertising failed: %d", err);
2412 return 0x00;
2413 }
2414 }
2415
2416 /* Disable address resolution while reprogramming accept list since
2417 * devices that do have an IRK will be programmed in the resolving list
2418 * when LL Privacy is enabled.
2419 */
2420 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2421 if (err) {
2422 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
2423 goto done;
2424 }
2425
2426 /* Go through the current accept list programmed into the
2427 * controller one by one and check if that address is connected or is
2428 * still in the list of pending connections or list of devices to
2429 * report. If not present in either list, then remove it from
2430 * the controller.
2431 */
2432 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
2433 if (hci_conn_hash_lookup_le(hdev, &b->bdaddr, b->bdaddr_type))
2434 continue;
2435
2436 pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2437 &b->bdaddr,
2438 b->bdaddr_type);
2439 pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2440 &b->bdaddr,
2441 b->bdaddr_type);
2442
2443 /* If the device is not likely to connect or report,
2444 * remove it from the acceptlist.
2445 */
2446 if (!pend_conn && !pend_report) {
2447 hci_le_del_accept_list_sync(hdev, &b->bdaddr,
2448 b->bdaddr_type);
2449 continue;
2450 }
2451
2452 num_entries++;
2453 }
2454
2455 /* Since all no longer valid accept list entries have been
2456 * removed, walk through the list of pending connections
2457 * and ensure that any new device gets programmed into
2458 * the controller.
2459 *
2460 * If the list of the devices is larger than the list of
2461 * available accept list entries in the controller, then
2462 * just abort and return filer policy value to not use the
2463 * accept list.
2464 */
2465 list_for_each_entry(params, &hdev->pend_le_conns, action) {
2466 err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
2467 if (err)
2468 goto done;
2469 }
2470
2471 /* After adding all new pending connections, walk through
2472 * the list of pending reports and also add these to the
2473 * accept list if there is still space. Abort if space runs out.
2474 */
2475 list_for_each_entry(params, &hdev->pend_le_reports, action) {
2476 err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
2477 if (err)
2478 goto done;
2479 }
2480
2481 /* Use the allowlist unless the following conditions are all true:
2482 * - We are not currently suspending
2483 * - There are 1 or more ADV monitors registered and it's not offloaded
2484 * - Interleaved scanning is not currently using the allowlist
2485 */
2486 if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
2487 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
2488 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
2489 err = -EINVAL;
2490
2491done:
2492 filter_policy = err ? 0x00 : 0x01;
2493
2494 /* Enable address resolution when LL Privacy is enabled. */
2495 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2496 if (err)
2497 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
2498
2499 /* Resume advertising if it was paused */
2500 if (use_ll_privacy(hdev))
2501 hci_resume_advertising_sync(hdev);
2502
2503 /* Select filter policy to use accept list */
2504 return filter_policy;
2505}
2506
2507/* Returns true if an le connection is in the scanning state */
2508static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
2509{
2510 struct hci_conn_hash *h = &hdev->conn_hash;
2511 struct hci_conn *c;
2512
2513 rcu_read_lock();
2514
2515 list_for_each_entry_rcu(c, &h->list, list) {
2516 if (c->type == LE_LINK && c->state == BT_CONNECT &&
2517 test_bit(HCI_CONN_SCANNING, &c->flags)) {
2518 rcu_read_unlock();
2519 return true;
2520 }
2521 }
2522
2523 rcu_read_unlock();
2524
2525 return false;
2526}
2527
2528static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
2529 u16 interval, u16 window,
2530 u8 own_addr_type, u8 filter_policy)
2531{
2532 struct hci_cp_le_set_ext_scan_params *cp;
2533 struct hci_cp_le_scan_phy_params *phy;
2534 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
2535 u8 num_phy = 0;
2536
2537 cp = (void *)data;
2538 phy = (void *)cp->data;
2539
2540 memset(data, 0, sizeof(data));
2541
2542 cp->own_addr_type = own_addr_type;
2543 cp->filter_policy = filter_policy;
2544
2545 if (scan_1m(hdev) || scan_2m(hdev)) {
2546 cp->scanning_phys |= LE_SCAN_PHY_1M;
2547
2548 phy->type = type;
2549 phy->interval = cpu_to_le16(interval);
2550 phy->window = cpu_to_le16(window);
2551
2552 num_phy++;
2553 phy++;
2554 }
2555
2556 if (scan_coded(hdev)) {
2557 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2558
2559 phy->type = type;
2560 phy->interval = cpu_to_le16(interval);
2561 phy->window = cpu_to_le16(window);
2562
2563 num_phy++;
2564 phy++;
2565 }
2566
2567 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
2568 sizeof(*cp) + sizeof(*phy) * num_phy,
2569 data, HCI_CMD_TIMEOUT);
2570}
2571
2572static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
2573 u16 interval, u16 window,
2574 u8 own_addr_type, u8 filter_policy)
2575{
2576 struct hci_cp_le_set_scan_param cp;
2577
2578 if (use_ext_scan(hdev))
2579 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
2580 window, own_addr_type,
2581 filter_policy);
2582
2583 memset(&cp, 0, sizeof(cp));
2584 cp.type = type;
2585 cp.interval = cpu_to_le16(interval);
2586 cp.window = cpu_to_le16(window);
2587 cp.own_address_type = own_addr_type;
2588 cp.filter_policy = filter_policy;
2589
2590 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
2591 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2592}
2593
2594static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
2595 u16 window, u8 own_addr_type, u8 filter_policy,
2596 u8 filter_dup)
2597{
2598 int err;
2599
2600 if (hdev->scanning_paused) {
2601 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2602 return 0;
2603 }
2604
2605 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
2606 own_addr_type, filter_policy);
2607 if (err)
2608 return err;
2609
2610 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
2611}
2612
2613static int hci_passive_scan_sync(struct hci_dev *hdev)
2614{
2615 u8 own_addr_type;
2616 u8 filter_policy;
2617 u16 window, interval;
2618 u8 filter_dups = LE_SCAN_FILTER_DUP_ENABLE;
2619 int err;
2620
2621 if (hdev->scanning_paused) {
2622 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2623 return 0;
2624 }
2625
2626 err = hci_scan_disable_sync(hdev);
2627 if (err) {
2628 bt_dev_err(hdev, "disable scanning failed: %d", err);
2629 return err;
2630 }
2631
2632 /* Set require_privacy to false since no SCAN_REQ are send
2633 * during passive scanning. Not using an non-resolvable address
2634 * here is important so that peer devices using direct
2635 * advertising with our address will be correctly reported
2636 * by the controller.
2637 */
2638 if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
2639 &own_addr_type))
2640 return 0;
2641
2642 if (hdev->enable_advmon_interleave_scan &&
2643 hci_update_interleaved_scan_sync(hdev))
2644 return 0;
2645
2646 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
2647
2648 /* Adding or removing entries from the accept list must
2649 * happen before enabling scanning. The controller does
2650 * not allow accept list modification while scanning.
2651 */
2652 filter_policy = hci_update_accept_list_sync(hdev);
2653
2654 /* When the controller is using random resolvable addresses and
2655 * with that having LE privacy enabled, then controllers with
2656 * Extended Scanner Filter Policies support can now enable support
2657 * for handling directed advertising.
2658 *
2659 * So instead of using filter polices 0x00 (no acceptlist)
2660 * and 0x01 (acceptlist enabled) use the new filter policies
2661 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
2662 */
2663 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
2664 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
2665 filter_policy |= 0x02;
2666
2667 if (hdev->suspended) {
2668 window = hdev->le_scan_window_suspend;
2669 interval = hdev->le_scan_int_suspend;
2670 } else if (hci_is_le_conn_scanning(hdev)) {
2671 window = hdev->le_scan_window_connect;
2672 interval = hdev->le_scan_int_connect;
2673 } else if (hci_is_adv_monitoring(hdev)) {
2674 window = hdev->le_scan_window_adv_monitor;
2675 interval = hdev->le_scan_int_adv_monitor;
2676 } else {
2677 window = hdev->le_scan_window;
2678 interval = hdev->le_scan_interval;
2679 }
2680
2681 /* Disable all filtering for Mesh */
2682 if (hci_dev_test_flag(hdev, HCI_MESH)) {
2683 filter_policy = 0;
2684 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
2685 }
2686
2687 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
2688
2689 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
2690 own_addr_type, filter_policy, filter_dups);
2691}
2692
2693/* This function controls the passive scanning based on hdev->pend_le_conns
2694 * list. If there are pending LE connection we start the background scanning,
2695 * otherwise we stop it in the following sequence:
2696 *
2697 * If there are devices to scan:
2698 *
2699 * Disable Scanning -> Update Accept List ->
2700 * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
2701 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
2702 * Enable Scanning
2703 *
2704 * Otherwise:
2705 *
2706 * Disable Scanning
2707 */
2708int hci_update_passive_scan_sync(struct hci_dev *hdev)
2709{
2710 int err;
2711
2712 if (!test_bit(HCI_UP, &hdev->flags) ||
2713 test_bit(HCI_INIT, &hdev->flags) ||
2714 hci_dev_test_flag(hdev, HCI_SETUP) ||
2715 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2716 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2717 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2718 return 0;
2719
2720 /* No point in doing scanning if LE support hasn't been enabled */
2721 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2722 return 0;
2723
2724 /* If discovery is active don't interfere with it */
2725 if (hdev->discovery.state != DISCOVERY_STOPPED)
2726 return 0;
2727
2728 /* Reset RSSI and UUID filters when starting background scanning
2729 * since these filters are meant for service discovery only.
2730 *
2731 * The Start Discovery and Start Service Discovery operations
2732 * ensure to set proper values for RSSI threshold and UUID
2733 * filter list. So it is safe to just reset them here.
2734 */
2735 hci_discovery_filter_clear(hdev);
2736
2737 bt_dev_dbg(hdev, "ADV monitoring is %s",
2738 hci_is_adv_monitoring(hdev) ? "on" : "off");
2739
2740 if (!hci_dev_test_flag(hdev, HCI_MESH) &&
2741 list_empty(&hdev->pend_le_conns) &&
2742 list_empty(&hdev->pend_le_reports) &&
2743 !hci_is_adv_monitoring(hdev) &&
2744 !hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2745 /* If there is no pending LE connections or devices
2746 * to be scanned for or no ADV monitors, we should stop the
2747 * background scanning.
2748 */
2749
2750 bt_dev_dbg(hdev, "stopping background scanning");
2751
2752 err = hci_scan_disable_sync(hdev);
2753 if (err)
2754 bt_dev_err(hdev, "stop background scanning failed: %d",
2755 err);
2756 } else {
2757 /* If there is at least one pending LE connection, we should
2758 * keep the background scan running.
2759 */
2760
2761 /* If controller is connecting, we should not start scanning
2762 * since some controllers are not able to scan and connect at
2763 * the same time.
2764 */
2765 if (hci_lookup_le_connect(hdev))
2766 return 0;
2767
2768 bt_dev_dbg(hdev, "start background scanning");
2769
2770 err = hci_passive_scan_sync(hdev);
2771 if (err)
2772 bt_dev_err(hdev, "start background scanning failed: %d",
2773 err);
2774 }
2775
2776 return err;
2777}
2778
2779static int update_scan_sync(struct hci_dev *hdev, void *data)
2780{
2781 return hci_update_scan_sync(hdev);
2782}
2783
2784int hci_update_scan(struct hci_dev *hdev)
2785{
2786 return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL);
2787}
2788
2789static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
2790{
2791 return hci_update_passive_scan_sync(hdev);
2792}
2793
2794int hci_update_passive_scan(struct hci_dev *hdev)
2795{
2796 /* Only queue if it would have any effect */
2797 if (!test_bit(HCI_UP, &hdev->flags) ||
2798 test_bit(HCI_INIT, &hdev->flags) ||
2799 hci_dev_test_flag(hdev, HCI_SETUP) ||
2800 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2801 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2802 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2803 return 0;
2804
2805 return hci_cmd_sync_queue(hdev, update_passive_scan_sync, NULL, NULL);
2806}
2807
2808int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
2809{
2810 int err;
2811
2812 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
2813 return 0;
2814
2815 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
2816 sizeof(val), &val, HCI_CMD_TIMEOUT);
2817
2818 if (!err) {
2819 if (val) {
2820 hdev->features[1][0] |= LMP_HOST_SC;
2821 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
2822 } else {
2823 hdev->features[1][0] &= ~LMP_HOST_SC;
2824 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
2825 }
2826 }
2827
2828 return err;
2829}
2830
2831int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
2832{
2833 int err;
2834
2835 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
2836 lmp_host_ssp_capable(hdev))
2837 return 0;
2838
2839 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
2840 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
2841 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2842 }
2843
2844 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
2845 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2846 if (err)
2847 return err;
2848
2849 return hci_write_sc_support_sync(hdev, 0x01);
2850}
2851
2852int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
2853{
2854 struct hci_cp_write_le_host_supported cp;
2855
2856 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
2857 !lmp_bredr_capable(hdev))
2858 return 0;
2859
2860 /* Check first if we already have the right host state
2861 * (host features set)
2862 */
2863 if (le == lmp_host_le_capable(hdev) &&
2864 simul == lmp_host_le_br_capable(hdev))
2865 return 0;
2866
2867 memset(&cp, 0, sizeof(cp));
2868
2869 cp.le = le;
2870 cp.simul = simul;
2871
2872 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
2873 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2874}
2875
2876static int hci_powered_update_adv_sync(struct hci_dev *hdev)
2877{
2878 struct adv_info *adv, *tmp;
2879 int err;
2880
2881 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2882 return 0;
2883
2884 /* If RPA Resolution has not been enable yet it means the
2885 * resolving list is empty and we should attempt to program the
2886 * local IRK in order to support using own_addr_type
2887 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
2888 */
2889 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
2890 hci_le_add_resolve_list_sync(hdev, NULL);
2891 hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2892 }
2893
2894 /* Make sure the controller has a good default for
2895 * advertising data. This also applies to the case
2896 * where BR/EDR was toggled during the AUTO_OFF phase.
2897 */
2898 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
2899 list_empty(&hdev->adv_instances)) {
2900 if (ext_adv_capable(hdev)) {
2901 err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
2902 if (!err)
2903 hci_update_scan_rsp_data_sync(hdev, 0x00);
2904 } else {
2905 err = hci_update_adv_data_sync(hdev, 0x00);
2906 if (!err)
2907 hci_update_scan_rsp_data_sync(hdev, 0x00);
2908 }
2909
2910 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
2911 hci_enable_advertising_sync(hdev);
2912 }
2913
2914 /* Call for each tracked instance to be scheduled */
2915 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
2916 hci_schedule_adv_instance_sync(hdev, adv->instance, true);
2917
2918 return 0;
2919}
2920
2921static int hci_write_auth_enable_sync(struct hci_dev *hdev)
2922{
2923 u8 link_sec;
2924
2925 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
2926 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
2927 return 0;
2928
2929 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
2930 sizeof(link_sec), &link_sec,
2931 HCI_CMD_TIMEOUT);
2932}
2933
2934int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
2935{
2936 struct hci_cp_write_page_scan_activity cp;
2937 u8 type;
2938 int err = 0;
2939
2940 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
2941 return 0;
2942
2943 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
2944 return 0;
2945
2946 memset(&cp, 0, sizeof(cp));
2947
2948 if (enable) {
2949 type = PAGE_SCAN_TYPE_INTERLACED;
2950
2951 /* 160 msec page scan interval */
2952 cp.interval = cpu_to_le16(0x0100);
2953 } else {
2954 type = hdev->def_page_scan_type;
2955 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
2956 }
2957
2958 cp.window = cpu_to_le16(hdev->def_page_scan_window);
2959
2960 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
2961 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
2962 err = __hci_cmd_sync_status(hdev,
2963 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
2964 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2965 if (err)
2966 return err;
2967 }
2968
2969 if (hdev->page_scan_type != type)
2970 err = __hci_cmd_sync_status(hdev,
2971 HCI_OP_WRITE_PAGE_SCAN_TYPE,
2972 sizeof(type), &type,
2973 HCI_CMD_TIMEOUT);
2974
2975 return err;
2976}
2977
2978static bool disconnected_accept_list_entries(struct hci_dev *hdev)
2979{
2980 struct bdaddr_list *b;
2981
2982 list_for_each_entry(b, &hdev->accept_list, list) {
2983 struct hci_conn *conn;
2984
2985 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
2986 if (!conn)
2987 return true;
2988
2989 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2990 return true;
2991 }
2992
2993 return false;
2994}
2995
2996static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
2997{
2998 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
2999 sizeof(val), &val,
3000 HCI_CMD_TIMEOUT);
3001}
3002
3003int hci_update_scan_sync(struct hci_dev *hdev)
3004{
3005 u8 scan;
3006
3007 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3008 return 0;
3009
3010 if (!hdev_is_powered(hdev))
3011 return 0;
3012
3013 if (mgmt_powering_down(hdev))
3014 return 0;
3015
3016 if (hdev->scanning_paused)
3017 return 0;
3018
3019 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
3020 disconnected_accept_list_entries(hdev))
3021 scan = SCAN_PAGE;
3022 else
3023 scan = SCAN_DISABLED;
3024
3025 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
3026 scan |= SCAN_INQUIRY;
3027
3028 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
3029 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
3030 return 0;
3031
3032 return hci_write_scan_enable_sync(hdev, scan);
3033}
3034
3035int hci_update_name_sync(struct hci_dev *hdev)
3036{
3037 struct hci_cp_write_local_name cp;
3038
3039 memset(&cp, 0, sizeof(cp));
3040
3041 memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
3042
3043 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
3044 sizeof(cp), &cp,
3045 HCI_CMD_TIMEOUT);
3046}
3047
3048/* This function perform powered update HCI command sequence after the HCI init
3049 * sequence which end up resetting all states, the sequence is as follows:
3050 *
3051 * HCI_SSP_ENABLED(Enable SSP)
3052 * HCI_LE_ENABLED(Enable LE)
3053 * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
3054 * Update adv data)
3055 * Enable Authentication
3056 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
3057 * Set Name -> Set EIR)
3058 * HCI_FORCE_STATIC_ADDR | BDADDR_ANY && !HCI_BREDR_ENABLED (Set Static Address)
3059 */
3060int hci_powered_update_sync(struct hci_dev *hdev)
3061{
3062 int err;
3063
3064 /* Register the available SMP channels (BR/EDR and LE) only when
3065 * successfully powering on the controller. This late
3066 * registration is required so that LE SMP can clearly decide if
3067 * the public address or static address is used.
3068 */
3069 smp_register(hdev);
3070
3071 err = hci_write_ssp_mode_sync(hdev, 0x01);
3072 if (err)
3073 return err;
3074
3075 err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
3076 if (err)
3077 return err;
3078
3079 err = hci_powered_update_adv_sync(hdev);
3080 if (err)
3081 return err;
3082
3083 err = hci_write_auth_enable_sync(hdev);
3084 if (err)
3085 return err;
3086
3087 if (lmp_bredr_capable(hdev)) {
3088 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
3089 hci_write_fast_connectable_sync(hdev, true);
3090 else
3091 hci_write_fast_connectable_sync(hdev, false);
3092 hci_update_scan_sync(hdev);
3093 hci_update_class_sync(hdev);
3094 hci_update_name_sync(hdev);
3095 hci_update_eir_sync(hdev);
3096 }
3097
3098 /* If forcing static address is in use or there is no public
3099 * address use the static address as random address (but skip
3100 * the HCI command if the current random address is already the
3101 * static one.
3102 *
3103 * In case BR/EDR has been disabled on a dual-mode controller
3104 * and a static address has been configured, then use that
3105 * address instead of the public BR/EDR address.
3106 */
3107 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3108 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3109 !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))) {
3110 if (bacmp(&hdev->static_addr, BDADDR_ANY))
3111 return hci_set_random_addr_sync(hdev,
3112 &hdev->static_addr);
3113 }
3114
3115 return 0;
3116}
3117
3118/**
3119 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
3120 * (BD_ADDR) for a HCI device from
3121 * a firmware node property.
3122 * @hdev: The HCI device
3123 *
3124 * Search the firmware node for 'local-bd-address'.
3125 *
3126 * All-zero BD addresses are rejected, because those could be properties
3127 * that exist in the firmware tables, but were not updated by the firmware. For
3128 * example, the DTS could define 'local-bd-address', with zero BD addresses.
3129 */
3130static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
3131{
3132 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
3133 bdaddr_t ba;
3134 int ret;
3135
3136 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
3137 (u8 *)&ba, sizeof(ba));
3138 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
3139 return;
3140
3141 bacpy(&hdev->public_addr, &ba);
3142}
3143
3144struct hci_init_stage {
3145 int (*func)(struct hci_dev *hdev);
3146};
3147
3148/* Run init stage NULL terminated function table */
3149static int hci_init_stage_sync(struct hci_dev *hdev,
3150 const struct hci_init_stage *stage)
3151{
3152 size_t i;
3153
3154 for (i = 0; stage[i].func; i++) {
3155 int err;
3156
3157 err = stage[i].func(hdev);
3158 if (err)
3159 return err;
3160 }
3161
3162 return 0;
3163}
3164
3165/* Read Local Version */
3166static int hci_read_local_version_sync(struct hci_dev *hdev)
3167{
3168 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
3169 0, NULL, HCI_CMD_TIMEOUT);
3170}
3171
3172/* Read BD Address */
3173static int hci_read_bd_addr_sync(struct hci_dev *hdev)
3174{
3175 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
3176 0, NULL, HCI_CMD_TIMEOUT);
3177}
3178
3179#define HCI_INIT(_func) \
3180{ \
3181 .func = _func, \
3182}
3183
3184static const struct hci_init_stage hci_init0[] = {
3185 /* HCI_OP_READ_LOCAL_VERSION */
3186 HCI_INIT(hci_read_local_version_sync),
3187 /* HCI_OP_READ_BD_ADDR */
3188 HCI_INIT(hci_read_bd_addr_sync),
3189 {}
3190};
3191
3192int hci_reset_sync(struct hci_dev *hdev)
3193{
3194 int err;
3195
3196 set_bit(HCI_RESET, &hdev->flags);
3197
3198 err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
3199 HCI_CMD_TIMEOUT);
3200 if (err)
3201 return err;
3202
3203 return 0;
3204}
3205
3206static int hci_init0_sync(struct hci_dev *hdev)
3207{
3208 int err;
3209
3210 bt_dev_dbg(hdev, "");
3211
3212 /* Reset */
3213 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3214 err = hci_reset_sync(hdev);
3215 if (err)
3216 return err;
3217 }
3218
3219 return hci_init_stage_sync(hdev, hci_init0);
3220}
3221
3222static int hci_unconf_init_sync(struct hci_dev *hdev)
3223{
3224 int err;
3225
3226 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3227 return 0;
3228
3229 err = hci_init0_sync(hdev);
3230 if (err < 0)
3231 return err;
3232
3233 if (hci_dev_test_flag(hdev, HCI_SETUP))
3234 hci_debugfs_create_basic(hdev);
3235
3236 return 0;
3237}
3238
3239/* Read Local Supported Features. */
3240static int hci_read_local_features_sync(struct hci_dev *hdev)
3241{
3242 /* Not all AMP controllers support this command */
3243 if (hdev->dev_type == HCI_AMP && !(hdev->commands[14] & 0x20))
3244 return 0;
3245
3246 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
3247 0, NULL, HCI_CMD_TIMEOUT);
3248}
3249
3250/* BR Controller init stage 1 command sequence */
3251static const struct hci_init_stage br_init1[] = {
3252 /* HCI_OP_READ_LOCAL_FEATURES */
3253 HCI_INIT(hci_read_local_features_sync),
3254 /* HCI_OP_READ_LOCAL_VERSION */
3255 HCI_INIT(hci_read_local_version_sync),
3256 /* HCI_OP_READ_BD_ADDR */
3257 HCI_INIT(hci_read_bd_addr_sync),
3258 {}
3259};
3260
3261/* Read Local Commands */
3262static int hci_read_local_cmds_sync(struct hci_dev *hdev)
3263{
3264 /* All Bluetooth 1.2 and later controllers should support the
3265 * HCI command for reading the local supported commands.
3266 *
3267 * Unfortunately some controllers indicate Bluetooth 1.2 support,
3268 * but do not have support for this command. If that is the case,
3269 * the driver can quirk the behavior and skip reading the local
3270 * supported commands.
3271 */
3272 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
3273 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
3274 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
3275 0, NULL, HCI_CMD_TIMEOUT);
3276
3277 return 0;
3278}
3279
3280/* Read Local AMP Info */
3281static int hci_read_local_amp_info_sync(struct hci_dev *hdev)
3282{
3283 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_AMP_INFO,
3284 0, NULL, HCI_CMD_TIMEOUT);
3285}
3286
3287/* Read Data Blk size */
3288static int hci_read_data_block_size_sync(struct hci_dev *hdev)
3289{
3290 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DATA_BLOCK_SIZE,
3291 0, NULL, HCI_CMD_TIMEOUT);
3292}
3293
3294/* Read Flow Control Mode */
3295static int hci_read_flow_control_mode_sync(struct hci_dev *hdev)
3296{
3297 return __hci_cmd_sync_status(hdev, HCI_OP_READ_FLOW_CONTROL_MODE,
3298 0, NULL, HCI_CMD_TIMEOUT);
3299}
3300
3301/* Read Location Data */
3302static int hci_read_location_data_sync(struct hci_dev *hdev)
3303{
3304 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCATION_DATA,
3305 0, NULL, HCI_CMD_TIMEOUT);
3306}
3307
3308/* AMP Controller init stage 1 command sequence */
3309static const struct hci_init_stage amp_init1[] = {
3310 /* HCI_OP_READ_LOCAL_VERSION */
3311 HCI_INIT(hci_read_local_version_sync),
3312 /* HCI_OP_READ_LOCAL_COMMANDS */
3313 HCI_INIT(hci_read_local_cmds_sync),
3314 /* HCI_OP_READ_LOCAL_AMP_INFO */
3315 HCI_INIT(hci_read_local_amp_info_sync),
3316 /* HCI_OP_READ_DATA_BLOCK_SIZE */
3317 HCI_INIT(hci_read_data_block_size_sync),
3318 /* HCI_OP_READ_FLOW_CONTROL_MODE */
3319 HCI_INIT(hci_read_flow_control_mode_sync),
3320 /* HCI_OP_READ_LOCATION_DATA */
3321 HCI_INIT(hci_read_location_data_sync),
3322};
3323
3324static int hci_init1_sync(struct hci_dev *hdev)
3325{
3326 int err;
3327
3328 bt_dev_dbg(hdev, "");
3329
3330 /* Reset */
3331 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3332 err = hci_reset_sync(hdev);
3333 if (err)
3334 return err;
3335 }
3336
3337 switch (hdev->dev_type) {
3338 case HCI_PRIMARY:
3339 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
3340 return hci_init_stage_sync(hdev, br_init1);
3341 case HCI_AMP:
3342 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
3343 return hci_init_stage_sync(hdev, amp_init1);
3344 default:
3345 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
3346 break;
3347 }
3348
3349 return 0;
3350}
3351
3352/* AMP Controller init stage 2 command sequence */
3353static const struct hci_init_stage amp_init2[] = {
3354 /* HCI_OP_READ_LOCAL_FEATURES */
3355 HCI_INIT(hci_read_local_features_sync),
3356};
3357
3358/* Read Buffer Size (ACL mtu, max pkt, etc.) */
3359static int hci_read_buffer_size_sync(struct hci_dev *hdev)
3360{
3361 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
3362 0, NULL, HCI_CMD_TIMEOUT);
3363}
3364
3365/* Read Class of Device */
3366static int hci_read_dev_class_sync(struct hci_dev *hdev)
3367{
3368 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
3369 0, NULL, HCI_CMD_TIMEOUT);
3370}
3371
3372/* Read Local Name */
3373static int hci_read_local_name_sync(struct hci_dev *hdev)
3374{
3375 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
3376 0, NULL, HCI_CMD_TIMEOUT);
3377}
3378
3379/* Read Voice Setting */
3380static int hci_read_voice_setting_sync(struct hci_dev *hdev)
3381{
3382 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
3383 0, NULL, HCI_CMD_TIMEOUT);
3384}
3385
3386/* Read Number of Supported IAC */
3387static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
3388{
3389 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
3390 0, NULL, HCI_CMD_TIMEOUT);
3391}
3392
3393/* Read Current IAC LAP */
3394static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
3395{
3396 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
3397 0, NULL, HCI_CMD_TIMEOUT);
3398}
3399
3400static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
3401 u8 cond_type, bdaddr_t *bdaddr,
3402 u8 auto_accept)
3403{
3404 struct hci_cp_set_event_filter cp;
3405
3406 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3407 return 0;
3408
3409 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3410 return 0;
3411
3412 memset(&cp, 0, sizeof(cp));
3413 cp.flt_type = flt_type;
3414
3415 if (flt_type != HCI_FLT_CLEAR_ALL) {
3416 cp.cond_type = cond_type;
3417 bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
3418 cp.addr_conn_flt.auto_accept = auto_accept;
3419 }
3420
3421 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
3422 flt_type == HCI_FLT_CLEAR_ALL ?
3423 sizeof(cp.flt_type) : sizeof(cp), &cp,
3424 HCI_CMD_TIMEOUT);
3425}
3426
3427static int hci_clear_event_filter_sync(struct hci_dev *hdev)
3428{
3429 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
3430 return 0;
3431
3432 /* In theory the state machine should not reach here unless
3433 * a hci_set_event_filter_sync() call succeeds, but we do
3434 * the check both for parity and as a future reminder.
3435 */
3436 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3437 return 0;
3438
3439 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
3440 BDADDR_ANY, 0x00);
3441}
3442
3443/* Connection accept timeout ~20 secs */
3444static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
3445{
3446 __le16 param = cpu_to_le16(0x7d00);
3447
3448 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
3449 sizeof(param), ¶m, HCI_CMD_TIMEOUT);
3450}
3451
3452/* BR Controller init stage 2 command sequence */
3453static const struct hci_init_stage br_init2[] = {
3454 /* HCI_OP_READ_BUFFER_SIZE */
3455 HCI_INIT(hci_read_buffer_size_sync),
3456 /* HCI_OP_READ_CLASS_OF_DEV */
3457 HCI_INIT(hci_read_dev_class_sync),
3458 /* HCI_OP_READ_LOCAL_NAME */
3459 HCI_INIT(hci_read_local_name_sync),
3460 /* HCI_OP_READ_VOICE_SETTING */
3461 HCI_INIT(hci_read_voice_setting_sync),
3462 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
3463 HCI_INIT(hci_read_num_supported_iac_sync),
3464 /* HCI_OP_READ_CURRENT_IAC_LAP */
3465 HCI_INIT(hci_read_current_iac_lap_sync),
3466 /* HCI_OP_SET_EVENT_FLT */
3467 HCI_INIT(hci_clear_event_filter_sync),
3468 /* HCI_OP_WRITE_CA_TIMEOUT */
3469 HCI_INIT(hci_write_ca_timeout_sync),
3470 {}
3471};
3472
3473static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
3474{
3475 u8 mode = 0x01;
3476
3477 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3478 return 0;
3479
3480 /* When SSP is available, then the host features page
3481 * should also be available as well. However some
3482 * controllers list the max_page as 0 as long as SSP
3483 * has not been enabled. To achieve proper debugging
3484 * output, force the minimum max_page to 1 at least.
3485 */
3486 hdev->max_page = 0x01;
3487
3488 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3489 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3490}
3491
3492static int hci_write_eir_sync(struct hci_dev *hdev)
3493{
3494 struct hci_cp_write_eir cp;
3495
3496 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3497 return 0;
3498
3499 memset(hdev->eir, 0, sizeof(hdev->eir));
3500 memset(&cp, 0, sizeof(cp));
3501
3502 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
3503 HCI_CMD_TIMEOUT);
3504}
3505
3506static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
3507{
3508 u8 mode;
3509
3510 if (!lmp_inq_rssi_capable(hdev) &&
3511 !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3512 return 0;
3513
3514 /* If Extended Inquiry Result events are supported, then
3515 * they are clearly preferred over Inquiry Result with RSSI
3516 * events.
3517 */
3518 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
3519
3520 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
3521 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3522}
3523
3524static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
3525{
3526 if (!lmp_inq_tx_pwr_capable(hdev))
3527 return 0;
3528
3529 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
3530 0, NULL, HCI_CMD_TIMEOUT);
3531}
3532
3533static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
3534{
3535 struct hci_cp_read_local_ext_features cp;
3536
3537 if (!lmp_ext_feat_capable(hdev))
3538 return 0;
3539
3540 memset(&cp, 0, sizeof(cp));
3541 cp.page = page;
3542
3543 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
3544 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3545}
3546
3547static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
3548{
3549 return hci_read_local_ext_features_sync(hdev, 0x01);
3550}
3551
3552/* HCI Controller init stage 2 command sequence */
3553static const struct hci_init_stage hci_init2[] = {
3554 /* HCI_OP_READ_LOCAL_COMMANDS */
3555 HCI_INIT(hci_read_local_cmds_sync),
3556 /* HCI_OP_WRITE_SSP_MODE */
3557 HCI_INIT(hci_write_ssp_mode_1_sync),
3558 /* HCI_OP_WRITE_EIR */
3559 HCI_INIT(hci_write_eir_sync),
3560 /* HCI_OP_WRITE_INQUIRY_MODE */
3561 HCI_INIT(hci_write_inquiry_mode_sync),
3562 /* HCI_OP_READ_INQ_RSP_TX_POWER */
3563 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
3564 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3565 HCI_INIT(hci_read_local_ext_features_1_sync),
3566 /* HCI_OP_WRITE_AUTH_ENABLE */
3567 HCI_INIT(hci_write_auth_enable_sync),
3568 {}
3569};
3570
3571/* Read LE Buffer Size */
3572static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
3573{
3574 /* Use Read LE Buffer Size V2 if supported */
3575 if (iso_capable(hdev) && hdev->commands[41] & 0x20)
3576 return __hci_cmd_sync_status(hdev,
3577 HCI_OP_LE_READ_BUFFER_SIZE_V2,
3578 0, NULL, HCI_CMD_TIMEOUT);
3579
3580 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
3581 0, NULL, HCI_CMD_TIMEOUT);
3582}
3583
3584/* Read LE Local Supported Features */
3585static int hci_le_read_local_features_sync(struct hci_dev *hdev)
3586{
3587 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
3588 0, NULL, HCI_CMD_TIMEOUT);
3589}
3590
3591/* Read LE Supported States */
3592static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
3593{
3594 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
3595 0, NULL, HCI_CMD_TIMEOUT);
3596}
3597
3598/* LE Controller init stage 2 command sequence */
3599static const struct hci_init_stage le_init2[] = {
3600 /* HCI_OP_LE_READ_LOCAL_FEATURES */
3601 HCI_INIT(hci_le_read_local_features_sync),
3602 /* HCI_OP_LE_READ_BUFFER_SIZE */
3603 HCI_INIT(hci_le_read_buffer_size_sync),
3604 /* HCI_OP_LE_READ_SUPPORTED_STATES */
3605 HCI_INIT(hci_le_read_supported_states_sync),
3606 {}
3607};
3608
3609static int hci_init2_sync(struct hci_dev *hdev)
3610{
3611 int err;
3612
3613 bt_dev_dbg(hdev, "");
3614
3615 if (hdev->dev_type == HCI_AMP)
3616 return hci_init_stage_sync(hdev, amp_init2);
3617
3618 err = hci_init_stage_sync(hdev, hci_init2);
3619 if (err)
3620 return err;
3621
3622 if (lmp_bredr_capable(hdev)) {
3623 err = hci_init_stage_sync(hdev, br_init2);
3624 if (err)
3625 return err;
3626 } else {
3627 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
3628 }
3629
3630 if (lmp_le_capable(hdev)) {
3631 err = hci_init_stage_sync(hdev, le_init2);
3632 if (err)
3633 return err;
3634 /* LE-only controllers have LE implicitly enabled */
3635 if (!lmp_bredr_capable(hdev))
3636 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
3637 }
3638
3639 return 0;
3640}
3641
3642static int hci_set_event_mask_sync(struct hci_dev *hdev)
3643{
3644 /* The second byte is 0xff instead of 0x9f (two reserved bits
3645 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
3646 * command otherwise.
3647 */
3648 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
3649
3650 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
3651 * any event mask for pre 1.2 devices.
3652 */
3653 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3654 return 0;
3655
3656 if (lmp_bredr_capable(hdev)) {
3657 events[4] |= 0x01; /* Flow Specification Complete */
3658
3659 /* Don't set Disconnect Complete when suspended as that
3660 * would wakeup the host when disconnecting due to
3661 * suspend.
3662 */
3663 if (hdev->suspended)
3664 events[0] &= 0xef;
3665 } else {
3666 /* Use a different default for LE-only devices */
3667 memset(events, 0, sizeof(events));
3668 events[1] |= 0x20; /* Command Complete */
3669 events[1] |= 0x40; /* Command Status */
3670 events[1] |= 0x80; /* Hardware Error */
3671
3672 /* If the controller supports the Disconnect command, enable
3673 * the corresponding event. In addition enable packet flow
3674 * control related events.
3675 */
3676 if (hdev->commands[0] & 0x20) {
3677 /* Don't set Disconnect Complete when suspended as that
3678 * would wakeup the host when disconnecting due to
3679 * suspend.
3680 */
3681 if (!hdev->suspended)
3682 events[0] |= 0x10; /* Disconnection Complete */
3683 events[2] |= 0x04; /* Number of Completed Packets */
3684 events[3] |= 0x02; /* Data Buffer Overflow */
3685 }
3686
3687 /* If the controller supports the Read Remote Version
3688 * Information command, enable the corresponding event.
3689 */
3690 if (hdev->commands[2] & 0x80)
3691 events[1] |= 0x08; /* Read Remote Version Information
3692 * Complete
3693 */
3694
3695 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
3696 events[0] |= 0x80; /* Encryption Change */
3697 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3698 }
3699 }
3700
3701 if (lmp_inq_rssi_capable(hdev) ||
3702 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3703 events[4] |= 0x02; /* Inquiry Result with RSSI */
3704
3705 if (lmp_ext_feat_capable(hdev))
3706 events[4] |= 0x04; /* Read Remote Extended Features Complete */
3707
3708 if (lmp_esco_capable(hdev)) {
3709 events[5] |= 0x08; /* Synchronous Connection Complete */
3710 events[5] |= 0x10; /* Synchronous Connection Changed */
3711 }
3712
3713 if (lmp_sniffsubr_capable(hdev))
3714 events[5] |= 0x20; /* Sniff Subrating */
3715
3716 if (lmp_pause_enc_capable(hdev))
3717 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3718
3719 if (lmp_ext_inq_capable(hdev))
3720 events[5] |= 0x40; /* Extended Inquiry Result */
3721
3722 if (lmp_no_flush_capable(hdev))
3723 events[7] |= 0x01; /* Enhanced Flush Complete */
3724
3725 if (lmp_lsto_capable(hdev))
3726 events[6] |= 0x80; /* Link Supervision Timeout Changed */
3727
3728 if (lmp_ssp_capable(hdev)) {
3729 events[6] |= 0x01; /* IO Capability Request */
3730 events[6] |= 0x02; /* IO Capability Response */
3731 events[6] |= 0x04; /* User Confirmation Request */
3732 events[6] |= 0x08; /* User Passkey Request */
3733 events[6] |= 0x10; /* Remote OOB Data Request */
3734 events[6] |= 0x20; /* Simple Pairing Complete */
3735 events[7] |= 0x04; /* User Passkey Notification */
3736 events[7] |= 0x08; /* Keypress Notification */
3737 events[7] |= 0x10; /* Remote Host Supported
3738 * Features Notification
3739 */
3740 }
3741
3742 if (lmp_le_capable(hdev))
3743 events[7] |= 0x20; /* LE Meta-Event */
3744
3745 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
3746 sizeof(events), events, HCI_CMD_TIMEOUT);
3747}
3748
3749static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
3750{
3751 struct hci_cp_read_stored_link_key cp;
3752
3753 if (!(hdev->commands[6] & 0x20) ||
3754 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
3755 return 0;
3756
3757 memset(&cp, 0, sizeof(cp));
3758 bacpy(&cp.bdaddr, BDADDR_ANY);
3759 cp.read_all = 0x01;
3760
3761 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
3762 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3763}
3764
3765static int hci_setup_link_policy_sync(struct hci_dev *hdev)
3766{
3767 struct hci_cp_write_def_link_policy cp;
3768 u16 link_policy = 0;
3769
3770 if (!(hdev->commands[5] & 0x10))
3771 return 0;
3772
3773 memset(&cp, 0, sizeof(cp));
3774
3775 if (lmp_rswitch_capable(hdev))
3776 link_policy |= HCI_LP_RSWITCH;
3777 if (lmp_hold_capable(hdev))
3778 link_policy |= HCI_LP_HOLD;
3779 if (lmp_sniff_capable(hdev))
3780 link_policy |= HCI_LP_SNIFF;
3781 if (lmp_park_capable(hdev))
3782 link_policy |= HCI_LP_PARK;
3783
3784 cp.policy = cpu_to_le16(link_policy);
3785
3786 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
3787 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3788}
3789
3790static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
3791{
3792 if (!(hdev->commands[8] & 0x01))
3793 return 0;
3794
3795 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
3796 0, NULL, HCI_CMD_TIMEOUT);
3797}
3798
3799static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
3800{
3801 if (!(hdev->commands[18] & 0x04) ||
3802 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
3803 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
3804 return 0;
3805
3806 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
3807 0, NULL, HCI_CMD_TIMEOUT);
3808}
3809
3810static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
3811{
3812 /* Some older Broadcom based Bluetooth 1.2 controllers do not
3813 * support the Read Page Scan Type command. Check support for
3814 * this command in the bit mask of supported commands.
3815 */
3816 if (!(hdev->commands[13] & 0x01))
3817 return 0;
3818
3819 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
3820 0, NULL, HCI_CMD_TIMEOUT);
3821}
3822
3823/* Read features beyond page 1 if available */
3824static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
3825{
3826 u8 page;
3827 int err;
3828
3829 if (!lmp_ext_feat_capable(hdev))
3830 return 0;
3831
3832 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
3833 page++) {
3834 err = hci_read_local_ext_features_sync(hdev, page);
3835 if (err)
3836 return err;
3837 }
3838
3839 return 0;
3840}
3841
3842/* HCI Controller init stage 3 command sequence */
3843static const struct hci_init_stage hci_init3[] = {
3844 /* HCI_OP_SET_EVENT_MASK */
3845 HCI_INIT(hci_set_event_mask_sync),
3846 /* HCI_OP_READ_STORED_LINK_KEY */
3847 HCI_INIT(hci_read_stored_link_key_sync),
3848 /* HCI_OP_WRITE_DEF_LINK_POLICY */
3849 HCI_INIT(hci_setup_link_policy_sync),
3850 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
3851 HCI_INIT(hci_read_page_scan_activity_sync),
3852 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
3853 HCI_INIT(hci_read_def_err_data_reporting_sync),
3854 /* HCI_OP_READ_PAGE_SCAN_TYPE */
3855 HCI_INIT(hci_read_page_scan_type_sync),
3856 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3857 HCI_INIT(hci_read_local_ext_features_all_sync),
3858 {}
3859};
3860
3861static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
3862{
3863 u8 events[8];
3864
3865 if (!lmp_le_capable(hdev))
3866 return 0;
3867
3868 memset(events, 0, sizeof(events));
3869
3870 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
3871 events[0] |= 0x10; /* LE Long Term Key Request */
3872
3873 /* If controller supports the Connection Parameters Request
3874 * Link Layer Procedure, enable the corresponding event.
3875 */
3876 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
3877 /* LE Remote Connection Parameter Request */
3878 events[0] |= 0x20;
3879
3880 /* If the controller supports the Data Length Extension
3881 * feature, enable the corresponding event.
3882 */
3883 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
3884 events[0] |= 0x40; /* LE Data Length Change */
3885
3886 /* If the controller supports LL Privacy feature or LE Extended Adv,
3887 * enable the corresponding event.
3888 */
3889 if (use_enhanced_conn_complete(hdev))
3890 events[1] |= 0x02; /* LE Enhanced Connection Complete */
3891
3892 /* If the controller supports Extended Scanner Filter
3893 * Policies, enable the corresponding event.
3894 */
3895 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
3896 events[1] |= 0x04; /* LE Direct Advertising Report */
3897
3898 /* If the controller supports Channel Selection Algorithm #2
3899 * feature, enable the corresponding event.
3900 */
3901 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
3902 events[2] |= 0x08; /* LE Channel Selection Algorithm */
3903
3904 /* If the controller supports the LE Set Scan Enable command,
3905 * enable the corresponding advertising report event.
3906 */
3907 if (hdev->commands[26] & 0x08)
3908 events[0] |= 0x02; /* LE Advertising Report */
3909
3910 /* If the controller supports the LE Create Connection
3911 * command, enable the corresponding event.
3912 */
3913 if (hdev->commands[26] & 0x10)
3914 events[0] |= 0x01; /* LE Connection Complete */
3915
3916 /* If the controller supports the LE Connection Update
3917 * command, enable the corresponding event.
3918 */
3919 if (hdev->commands[27] & 0x04)
3920 events[0] |= 0x04; /* LE Connection Update Complete */
3921
3922 /* If the controller supports the LE Read Remote Used Features
3923 * command, enable the corresponding event.
3924 */
3925 if (hdev->commands[27] & 0x20)
3926 /* LE Read Remote Used Features Complete */
3927 events[0] |= 0x08;
3928
3929 /* If the controller supports the LE Read Local P-256
3930 * Public Key command, enable the corresponding event.
3931 */
3932 if (hdev->commands[34] & 0x02)
3933 /* LE Read Local P-256 Public Key Complete */
3934 events[0] |= 0x80;
3935
3936 /* If the controller supports the LE Generate DHKey
3937 * command, enable the corresponding event.
3938 */
3939 if (hdev->commands[34] & 0x04)
3940 events[1] |= 0x01; /* LE Generate DHKey Complete */
3941
3942 /* If the controller supports the LE Set Default PHY or
3943 * LE Set PHY commands, enable the corresponding event.
3944 */
3945 if (hdev->commands[35] & (0x20 | 0x40))
3946 events[1] |= 0x08; /* LE PHY Update Complete */
3947
3948 /* If the controller supports LE Set Extended Scan Parameters
3949 * and LE Set Extended Scan Enable commands, enable the
3950 * corresponding event.
3951 */
3952 if (use_ext_scan(hdev))
3953 events[1] |= 0x10; /* LE Extended Advertising Report */
3954
3955 /* If the controller supports the LE Extended Advertising
3956 * command, enable the corresponding event.
3957 */
3958 if (ext_adv_capable(hdev))
3959 events[2] |= 0x02; /* LE Advertising Set Terminated */
3960
3961 if (cis_capable(hdev)) {
3962 events[3] |= 0x01; /* LE CIS Established */
3963 if (cis_peripheral_capable(hdev))
3964 events[3] |= 0x02; /* LE CIS Request */
3965 }
3966
3967 if (bis_capable(hdev)) {
3968 events[3] |= 0x04; /* LE Create BIG Complete */
3969 events[3] |= 0x08; /* LE Terminate BIG Complete */
3970 events[3] |= 0x10; /* LE BIG Sync Established */
3971 events[3] |= 0x20; /* LE BIG Sync Loss */
3972 }
3973
3974 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
3975 sizeof(events), events, HCI_CMD_TIMEOUT);
3976}
3977
3978/* Read LE Advertising Channel TX Power */
3979static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
3980{
3981 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
3982 /* HCI TS spec forbids mixing of legacy and extended
3983 * advertising commands wherein READ_ADV_TX_POWER is
3984 * also included. So do not call it if extended adv
3985 * is supported otherwise controller will return
3986 * COMMAND_DISALLOWED for extended commands.
3987 */
3988 return __hci_cmd_sync_status(hdev,
3989 HCI_OP_LE_READ_ADV_TX_POWER,
3990 0, NULL, HCI_CMD_TIMEOUT);
3991 }
3992
3993 return 0;
3994}
3995
3996/* Read LE Min/Max Tx Power*/
3997static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
3998{
3999 if (!(hdev->commands[38] & 0x80) ||
4000 test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
4001 return 0;
4002
4003 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
4004 0, NULL, HCI_CMD_TIMEOUT);
4005}
4006
4007/* Read LE Accept List Size */
4008static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
4009{
4010 if (!(hdev->commands[26] & 0x40))
4011 return 0;
4012
4013 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4014 0, NULL, HCI_CMD_TIMEOUT);
4015}
4016
4017/* Clear LE Accept List */
4018static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
4019{
4020 if (!(hdev->commands[26] & 0x80))
4021 return 0;
4022
4023 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
4024 HCI_CMD_TIMEOUT);
4025}
4026
4027/* Read LE Resolving List Size */
4028static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
4029{
4030 if (!(hdev->commands[34] & 0x40))
4031 return 0;
4032
4033 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
4034 0, NULL, HCI_CMD_TIMEOUT);
4035}
4036
4037/* Clear LE Resolving List */
4038static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
4039{
4040 if (!(hdev->commands[34] & 0x20))
4041 return 0;
4042
4043 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
4044 HCI_CMD_TIMEOUT);
4045}
4046
4047/* Set RPA timeout */
4048static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
4049{
4050 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
4051
4052 if (!(hdev->commands[35] & 0x04))
4053 return 0;
4054
4055 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
4056 sizeof(timeout), &timeout,
4057 HCI_CMD_TIMEOUT);
4058}
4059
4060/* Read LE Maximum Data Length */
4061static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
4062{
4063 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4064 return 0;
4065
4066 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
4067 HCI_CMD_TIMEOUT);
4068}
4069
4070/* Read LE Suggested Default Data Length */
4071static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
4072{
4073 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4074 return 0;
4075
4076 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
4077 HCI_CMD_TIMEOUT);
4078}
4079
4080/* Read LE Number of Supported Advertising Sets */
4081static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
4082{
4083 if (!ext_adv_capable(hdev))
4084 return 0;
4085
4086 return __hci_cmd_sync_status(hdev,
4087 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4088 0, NULL, HCI_CMD_TIMEOUT);
4089}
4090
4091/* Write LE Host Supported */
4092static int hci_set_le_support_sync(struct hci_dev *hdev)
4093{
4094 struct hci_cp_write_le_host_supported cp;
4095
4096 /* LE-only devices do not support explicit enablement */
4097 if (!lmp_bredr_capable(hdev))
4098 return 0;
4099
4100 memset(&cp, 0, sizeof(cp));
4101
4102 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
4103 cp.le = 0x01;
4104 cp.simul = 0x00;
4105 }
4106
4107 if (cp.le == lmp_host_le_capable(hdev))
4108 return 0;
4109
4110 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
4111 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4112}
4113
4114/* LE Set Host Feature */
4115static int hci_le_set_host_feature_sync(struct hci_dev *hdev)
4116{
4117 struct hci_cp_le_set_host_feature cp;
4118
4119 if (!iso_capable(hdev))
4120 return 0;
4121
4122 memset(&cp, 0, sizeof(cp));
4123
4124 /* Isochronous Channels (Host Support) */
4125 cp.bit_number = 32;
4126 cp.bit_value = 1;
4127
4128 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE,
4129 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4130}
4131
4132/* LE Controller init stage 3 command sequence */
4133static const struct hci_init_stage le_init3[] = {
4134 /* HCI_OP_LE_SET_EVENT_MASK */
4135 HCI_INIT(hci_le_set_event_mask_sync),
4136 /* HCI_OP_LE_READ_ADV_TX_POWER */
4137 HCI_INIT(hci_le_read_adv_tx_power_sync),
4138 /* HCI_OP_LE_READ_TRANSMIT_POWER */
4139 HCI_INIT(hci_le_read_tx_power_sync),
4140 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
4141 HCI_INIT(hci_le_read_accept_list_size_sync),
4142 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
4143 HCI_INIT(hci_le_clear_accept_list_sync),
4144 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
4145 HCI_INIT(hci_le_read_resolv_list_size_sync),
4146 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
4147 HCI_INIT(hci_le_clear_resolv_list_sync),
4148 /* HCI_OP_LE_SET_RPA_TIMEOUT */
4149 HCI_INIT(hci_le_set_rpa_timeout_sync),
4150 /* HCI_OP_LE_READ_MAX_DATA_LEN */
4151 HCI_INIT(hci_le_read_max_data_len_sync),
4152 /* HCI_OP_LE_READ_DEF_DATA_LEN */
4153 HCI_INIT(hci_le_read_def_data_len_sync),
4154 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
4155 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
4156 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
4157 HCI_INIT(hci_set_le_support_sync),
4158 /* HCI_OP_LE_SET_HOST_FEATURE */
4159 HCI_INIT(hci_le_set_host_feature_sync),
4160 {}
4161};
4162
4163static int hci_init3_sync(struct hci_dev *hdev)
4164{
4165 int err;
4166
4167 bt_dev_dbg(hdev, "");
4168
4169 err = hci_init_stage_sync(hdev, hci_init3);
4170 if (err)
4171 return err;
4172
4173 if (lmp_le_capable(hdev))
4174 return hci_init_stage_sync(hdev, le_init3);
4175
4176 return 0;
4177}
4178
4179static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
4180{
4181 struct hci_cp_delete_stored_link_key cp;
4182
4183 /* Some Broadcom based Bluetooth controllers do not support the
4184 * Delete Stored Link Key command. They are clearly indicating its
4185 * absence in the bit mask of supported commands.
4186 *
4187 * Check the supported commands and only if the command is marked
4188 * as supported send it. If not supported assume that the controller
4189 * does not have actual support for stored link keys which makes this
4190 * command redundant anyway.
4191 *
4192 * Some controllers indicate that they support handling deleting
4193 * stored link keys, but they don't. The quirk lets a driver
4194 * just disable this command.
4195 */
4196 if (!(hdev->commands[6] & 0x80) ||
4197 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
4198 return 0;
4199
4200 memset(&cp, 0, sizeof(cp));
4201 bacpy(&cp.bdaddr, BDADDR_ANY);
4202 cp.delete_all = 0x01;
4203
4204 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
4205 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4206}
4207
4208static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
4209{
4210 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
4211 bool changed = false;
4212
4213 /* Set event mask page 2 if the HCI command for it is supported */
4214 if (!(hdev->commands[22] & 0x04))
4215 return 0;
4216
4217 /* If Connectionless Peripheral Broadcast central role is supported
4218 * enable all necessary events for it.
4219 */
4220 if (lmp_cpb_central_capable(hdev)) {
4221 events[1] |= 0x40; /* Triggered Clock Capture */
4222 events[1] |= 0x80; /* Synchronization Train Complete */
4223 events[2] |= 0x08; /* Truncated Page Complete */
4224 events[2] |= 0x20; /* CPB Channel Map Change */
4225 changed = true;
4226 }
4227
4228 /* If Connectionless Peripheral Broadcast peripheral role is supported
4229 * enable all necessary events for it.
4230 */
4231 if (lmp_cpb_peripheral_capable(hdev)) {
4232 events[2] |= 0x01; /* Synchronization Train Received */
4233 events[2] |= 0x02; /* CPB Receive */
4234 events[2] |= 0x04; /* CPB Timeout */
4235 events[2] |= 0x10; /* Peripheral Page Response Timeout */
4236 changed = true;
4237 }
4238
4239 /* Enable Authenticated Payload Timeout Expired event if supported */
4240 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
4241 events[2] |= 0x80;
4242 changed = true;
4243 }
4244
4245 /* Some Broadcom based controllers indicate support for Set Event
4246 * Mask Page 2 command, but then actually do not support it. Since
4247 * the default value is all bits set to zero, the command is only
4248 * required if the event mask has to be changed. In case no change
4249 * to the event mask is needed, skip this command.
4250 */
4251 if (!changed)
4252 return 0;
4253
4254 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
4255 sizeof(events), events, HCI_CMD_TIMEOUT);
4256}
4257
4258/* Read local codec list if the HCI command is supported */
4259static int hci_read_local_codecs_sync(struct hci_dev *hdev)
4260{
4261 if (hdev->commands[45] & 0x04)
4262 hci_read_supported_codecs_v2(hdev);
4263 else if (hdev->commands[29] & 0x20)
4264 hci_read_supported_codecs(hdev);
4265
4266 return 0;
4267}
4268
4269/* Read local pairing options if the HCI command is supported */
4270static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
4271{
4272 if (!(hdev->commands[41] & 0x08))
4273 return 0;
4274
4275 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
4276 0, NULL, HCI_CMD_TIMEOUT);
4277}
4278
4279/* Get MWS transport configuration if the HCI command is supported */
4280static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
4281{
4282 if (!mws_transport_config_capable(hdev))
4283 return 0;
4284
4285 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
4286 0, NULL, HCI_CMD_TIMEOUT);
4287}
4288
4289/* Check for Synchronization Train support */
4290static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
4291{
4292 if (!lmp_sync_train_capable(hdev))
4293 return 0;
4294
4295 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
4296 0, NULL, HCI_CMD_TIMEOUT);
4297}
4298
4299/* Enable Secure Connections if supported and configured */
4300static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
4301{
4302 u8 support = 0x01;
4303
4304 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
4305 !bredr_sc_enabled(hdev))
4306 return 0;
4307
4308 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
4309 sizeof(support), &support,
4310 HCI_CMD_TIMEOUT);
4311}
4312
4313/* Set erroneous data reporting if supported to the wideband speech
4314 * setting value
4315 */
4316static int hci_set_err_data_report_sync(struct hci_dev *hdev)
4317{
4318 struct hci_cp_write_def_err_data_reporting cp;
4319 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
4320
4321 if (!(hdev->commands[18] & 0x08) ||
4322 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4323 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
4324 return 0;
4325
4326 if (enabled == hdev->err_data_reporting)
4327 return 0;
4328
4329 memset(&cp, 0, sizeof(cp));
4330 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
4331 ERR_DATA_REPORTING_DISABLED;
4332
4333 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4334 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4335}
4336
4337static const struct hci_init_stage hci_init4[] = {
4338 /* HCI_OP_DELETE_STORED_LINK_KEY */
4339 HCI_INIT(hci_delete_stored_link_key_sync),
4340 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
4341 HCI_INIT(hci_set_event_mask_page_2_sync),
4342 /* HCI_OP_READ_LOCAL_CODECS */
4343 HCI_INIT(hci_read_local_codecs_sync),
4344 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
4345 HCI_INIT(hci_read_local_pairing_opts_sync),
4346 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
4347 HCI_INIT(hci_get_mws_transport_config_sync),
4348 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
4349 HCI_INIT(hci_read_sync_train_params_sync),
4350 /* HCI_OP_WRITE_SC_SUPPORT */
4351 HCI_INIT(hci_write_sc_support_1_sync),
4352 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
4353 HCI_INIT(hci_set_err_data_report_sync),
4354 {}
4355};
4356
4357/* Set Suggested Default Data Length to maximum if supported */
4358static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
4359{
4360 struct hci_cp_le_write_def_data_len cp;
4361
4362 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4363 return 0;
4364
4365 memset(&cp, 0, sizeof(cp));
4366 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
4367 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
4368
4369 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
4370 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4371}
4372
4373/* Set Default PHY parameters if command is supported */
4374static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
4375{
4376 struct hci_cp_le_set_default_phy cp;
4377
4378 if (!(hdev->commands[35] & 0x20))
4379 return 0;
4380
4381 memset(&cp, 0, sizeof(cp));
4382 cp.all_phys = 0x00;
4383 cp.tx_phys = hdev->le_tx_def_phys;
4384 cp.rx_phys = hdev->le_rx_def_phys;
4385
4386 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
4387 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4388}
4389
4390static const struct hci_init_stage le_init4[] = {
4391 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
4392 HCI_INIT(hci_le_set_write_def_data_len_sync),
4393 /* HCI_OP_LE_SET_DEFAULT_PHY */
4394 HCI_INIT(hci_le_set_default_phy_sync),
4395 {}
4396};
4397
4398static int hci_init4_sync(struct hci_dev *hdev)
4399{
4400 int err;
4401
4402 bt_dev_dbg(hdev, "");
4403
4404 err = hci_init_stage_sync(hdev, hci_init4);
4405 if (err)
4406 return err;
4407
4408 if (lmp_le_capable(hdev))
4409 return hci_init_stage_sync(hdev, le_init4);
4410
4411 return 0;
4412}
4413
4414static int hci_init_sync(struct hci_dev *hdev)
4415{
4416 int err;
4417
4418 err = hci_init1_sync(hdev);
4419 if (err < 0)
4420 return err;
4421
4422 if (hci_dev_test_flag(hdev, HCI_SETUP))
4423 hci_debugfs_create_basic(hdev);
4424
4425 err = hci_init2_sync(hdev);
4426 if (err < 0)
4427 return err;
4428
4429 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
4430 * BR/EDR/LE type controllers. AMP controllers only need the
4431 * first two stages of init.
4432 */
4433 if (hdev->dev_type != HCI_PRIMARY)
4434 return 0;
4435
4436 err = hci_init3_sync(hdev);
4437 if (err < 0)
4438 return err;
4439
4440 err = hci_init4_sync(hdev);
4441 if (err < 0)
4442 return err;
4443
4444 /* This function is only called when the controller is actually in
4445 * configured state. When the controller is marked as unconfigured,
4446 * this initialization procedure is not run.
4447 *
4448 * It means that it is possible that a controller runs through its
4449 * setup phase and then discovers missing settings. If that is the
4450 * case, then this function will not be called. It then will only
4451 * be called during the config phase.
4452 *
4453 * So only when in setup phase or config phase, create the debugfs
4454 * entries and register the SMP channels.
4455 */
4456 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4457 !hci_dev_test_flag(hdev, HCI_CONFIG))
4458 return 0;
4459
4460 hci_debugfs_create_common(hdev);
4461
4462 if (lmp_bredr_capable(hdev))
4463 hci_debugfs_create_bredr(hdev);
4464
4465 if (lmp_le_capable(hdev))
4466 hci_debugfs_create_le(hdev);
4467
4468 return 0;
4469}
4470
4471#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
4472
4473static const struct {
4474 unsigned long quirk;
4475 const char *desc;
4476} hci_broken_table[] = {
4477 HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
4478 "HCI Read Local Supported Commands not supported"),
4479 HCI_QUIRK_BROKEN(STORED_LINK_KEY,
4480 "HCI Delete Stored Link Key command is advertised, "
4481 "but not supported."),
4482 HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
4483 "HCI Read Default Erroneous Data Reporting command is "
4484 "advertised, but not supported."),
4485 HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
4486 "HCI Read Transmit Power Level command is advertised, "
4487 "but not supported."),
4488 HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
4489 "HCI Set Event Filter command not supported."),
4490 HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
4491 "HCI Enhanced Setup Synchronous Connection command is "
4492 "advertised, but not supported.")
4493};
4494
4495/* This function handles hdev setup stage:
4496 *
4497 * Calls hdev->setup
4498 * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set.
4499 */
4500static int hci_dev_setup_sync(struct hci_dev *hdev)
4501{
4502 int ret = 0;
4503 bool invalid_bdaddr;
4504 size_t i;
4505
4506 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4507 !test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks))
4508 return 0;
4509
4510 bt_dev_dbg(hdev, "");
4511
4512 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
4513
4514 if (hdev->setup)
4515 ret = hdev->setup(hdev);
4516
4517 for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
4518 if (test_bit(hci_broken_table[i].quirk, &hdev->quirks))
4519 bt_dev_warn(hdev, "%s", hci_broken_table[i].desc);
4520 }
4521
4522 /* The transport driver can set the quirk to mark the
4523 * BD_ADDR invalid before creating the HCI device or in
4524 * its setup callback.
4525 */
4526 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
4527
4528 if (!ret) {
4529 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
4530 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
4531 hci_dev_get_bd_addr_from_property(hdev);
4532
4533 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
4534 hdev->set_bdaddr) {
4535 ret = hdev->set_bdaddr(hdev,
4536 &hdev->public_addr);
4537
4538 /* If setting of the BD_ADDR from the device
4539 * property succeeds, then treat the address
4540 * as valid even if the invalid BD_ADDR
4541 * quirk indicates otherwise.
4542 */
4543 if (!ret)
4544 invalid_bdaddr = false;
4545 }
4546 }
4547 }
4548
4549 /* The transport driver can set these quirks before
4550 * creating the HCI device or in its setup callback.
4551 *
4552 * For the invalid BD_ADDR quirk it is possible that
4553 * it becomes a valid address if the bootloader does
4554 * provide it (see above).
4555 *
4556 * In case any of them is set, the controller has to
4557 * start up as unconfigured.
4558 */
4559 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
4560 invalid_bdaddr)
4561 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
4562
4563 /* For an unconfigured controller it is required to
4564 * read at least the version information provided by
4565 * the Read Local Version Information command.
4566 *
4567 * If the set_bdaddr driver callback is provided, then
4568 * also the original Bluetooth public device address
4569 * will be read using the Read BD Address command.
4570 */
4571 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4572 return hci_unconf_init_sync(hdev);
4573
4574 return ret;
4575}
4576
4577/* This function handles hdev init stage:
4578 *
4579 * Calls hci_dev_setup_sync to perform setup stage
4580 * Calls hci_init_sync to perform HCI command init sequence
4581 */
4582static int hci_dev_init_sync(struct hci_dev *hdev)
4583{
4584 int ret;
4585
4586 bt_dev_dbg(hdev, "");
4587
4588 atomic_set(&hdev->cmd_cnt, 1);
4589 set_bit(HCI_INIT, &hdev->flags);
4590
4591 ret = hci_dev_setup_sync(hdev);
4592
4593 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
4594 /* If public address change is configured, ensure that
4595 * the address gets programmed. If the driver does not
4596 * support changing the public address, fail the power
4597 * on procedure.
4598 */
4599 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
4600 hdev->set_bdaddr)
4601 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4602 else
4603 ret = -EADDRNOTAVAIL;
4604 }
4605
4606 if (!ret) {
4607 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4608 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4609 ret = hci_init_sync(hdev);
4610 if (!ret && hdev->post_init)
4611 ret = hdev->post_init(hdev);
4612 }
4613 }
4614
4615 /* If the HCI Reset command is clearing all diagnostic settings,
4616 * then they need to be reprogrammed after the init procedure
4617 * completed.
4618 */
4619 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
4620 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4621 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
4622 ret = hdev->set_diag(hdev, true);
4623
4624 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4625 msft_do_open(hdev);
4626 aosp_do_open(hdev);
4627 }
4628
4629 clear_bit(HCI_INIT, &hdev->flags);
4630
4631 return ret;
4632}
4633
4634int hci_dev_open_sync(struct hci_dev *hdev)
4635{
4636 int ret;
4637
4638 bt_dev_dbg(hdev, "");
4639
4640 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
4641 ret = -ENODEV;
4642 goto done;
4643 }
4644
4645 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4646 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
4647 /* Check for rfkill but allow the HCI setup stage to
4648 * proceed (which in itself doesn't cause any RF activity).
4649 */
4650 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
4651 ret = -ERFKILL;
4652 goto done;
4653 }
4654
4655 /* Check for valid public address or a configured static
4656 * random address, but let the HCI setup proceed to
4657 * be able to determine if there is a public address
4658 * or not.
4659 *
4660 * In case of user channel usage, it is not important
4661 * if a public address or static random address is
4662 * available.
4663 *
4664 * This check is only valid for BR/EDR controllers
4665 * since AMP controllers do not have an address.
4666 */
4667 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4668 hdev->dev_type == HCI_PRIMARY &&
4669 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
4670 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
4671 ret = -EADDRNOTAVAIL;
4672 goto done;
4673 }
4674 }
4675
4676 if (test_bit(HCI_UP, &hdev->flags)) {
4677 ret = -EALREADY;
4678 goto done;
4679 }
4680
4681 if (hdev->open(hdev)) {
4682 ret = -EIO;
4683 goto done;
4684 }
4685
4686 set_bit(HCI_RUNNING, &hdev->flags);
4687 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
4688
4689 ret = hci_dev_init_sync(hdev);
4690 if (!ret) {
4691 hci_dev_hold(hdev);
4692 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
4693 hci_adv_instances_set_rpa_expired(hdev, true);
4694 set_bit(HCI_UP, &hdev->flags);
4695 hci_sock_dev_event(hdev, HCI_DEV_UP);
4696 hci_leds_update_powered(hdev, true);
4697 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4698 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
4699 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4700 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4701 hci_dev_test_flag(hdev, HCI_MGMT) &&
4702 hdev->dev_type == HCI_PRIMARY) {
4703 ret = hci_powered_update_sync(hdev);
4704 mgmt_power_on(hdev, ret);
4705 }
4706 } else {
4707 /* Init failed, cleanup */
4708 flush_work(&hdev->tx_work);
4709
4710 /* Since hci_rx_work() is possible to awake new cmd_work
4711 * it should be flushed first to avoid unexpected call of
4712 * hci_cmd_work()
4713 */
4714 flush_work(&hdev->rx_work);
4715 flush_work(&hdev->cmd_work);
4716
4717 skb_queue_purge(&hdev->cmd_q);
4718 skb_queue_purge(&hdev->rx_q);
4719
4720 if (hdev->flush)
4721 hdev->flush(hdev);
4722
4723 if (hdev->sent_cmd) {
4724 cancel_delayed_work_sync(&hdev->cmd_timer);
4725 kfree_skb(hdev->sent_cmd);
4726 hdev->sent_cmd = NULL;
4727 }
4728
4729 clear_bit(HCI_RUNNING, &hdev->flags);
4730 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4731
4732 hdev->close(hdev);
4733 hdev->flags &= BIT(HCI_RAW);
4734 }
4735
4736done:
4737 return ret;
4738}
4739
4740/* This function requires the caller holds hdev->lock */
4741static void hci_pend_le_actions_clear(struct hci_dev *hdev)
4742{
4743 struct hci_conn_params *p;
4744
4745 list_for_each_entry(p, &hdev->le_conn_params, list) {
4746 if (p->conn) {
4747 hci_conn_drop(p->conn);
4748 hci_conn_put(p->conn);
4749 p->conn = NULL;
4750 }
4751 list_del_init(&p->action);
4752 }
4753
4754 BT_DBG("All LE pending actions cleared");
4755}
4756
4757static int hci_dev_shutdown(struct hci_dev *hdev)
4758{
4759 int err = 0;
4760 /* Similar to how we first do setup and then set the exclusive access
4761 * bit for userspace, we must first unset userchannel and then clean up.
4762 * Otherwise, the kernel can't properly use the hci channel to clean up
4763 * the controller (some shutdown routines require sending additional
4764 * commands to the controller for example).
4765 */
4766 bool was_userchannel =
4767 hci_dev_test_and_clear_flag(hdev, HCI_USER_CHANNEL);
4768
4769 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
4770 test_bit(HCI_UP, &hdev->flags)) {
4771 /* Execute vendor specific shutdown routine */
4772 if (hdev->shutdown)
4773 err = hdev->shutdown(hdev);
4774 }
4775
4776 if (was_userchannel)
4777 hci_dev_set_flag(hdev, HCI_USER_CHANNEL);
4778
4779 return err;
4780}
4781
4782int hci_dev_close_sync(struct hci_dev *hdev)
4783{
4784 bool auto_off;
4785 int err = 0;
4786
4787 bt_dev_dbg(hdev, "");
4788
4789 cancel_delayed_work(&hdev->power_off);
4790 cancel_delayed_work(&hdev->ncmd_timer);
4791 cancel_delayed_work(&hdev->le_scan_disable);
4792 cancel_delayed_work(&hdev->le_scan_restart);
4793
4794 hci_request_cancel_all(hdev);
4795
4796 if (hdev->adv_instance_timeout) {
4797 cancel_delayed_work_sync(&hdev->adv_instance_expire);
4798 hdev->adv_instance_timeout = 0;
4799 }
4800
4801 err = hci_dev_shutdown(hdev);
4802
4803 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
4804 cancel_delayed_work_sync(&hdev->cmd_timer);
4805 return err;
4806 }
4807
4808 hci_leds_update_powered(hdev, false);
4809
4810 /* Flush RX and TX works */
4811 flush_work(&hdev->tx_work);
4812 flush_work(&hdev->rx_work);
4813
4814 if (hdev->discov_timeout > 0) {
4815 hdev->discov_timeout = 0;
4816 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
4817 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
4818 }
4819
4820 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
4821 cancel_delayed_work(&hdev->service_cache);
4822
4823 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4824 struct adv_info *adv_instance;
4825
4826 cancel_delayed_work_sync(&hdev->rpa_expired);
4827
4828 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
4829 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
4830 }
4831
4832 /* Avoid potential lockdep warnings from the *_flush() calls by
4833 * ensuring the workqueue is empty up front.
4834 */
4835 drain_workqueue(hdev->workqueue);
4836
4837 hci_dev_lock(hdev);
4838
4839 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
4840
4841 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
4842
4843 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
4844 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4845 hci_dev_test_flag(hdev, HCI_MGMT))
4846 __mgmt_power_off(hdev);
4847
4848 hci_inquiry_cache_flush(hdev);
4849 hci_pend_le_actions_clear(hdev);
4850 hci_conn_hash_flush(hdev);
4851 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
4852 smp_unregister(hdev);
4853 hci_dev_unlock(hdev);
4854
4855 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
4856
4857 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4858 aosp_do_close(hdev);
4859 msft_do_close(hdev);
4860 }
4861
4862 if (hdev->flush)
4863 hdev->flush(hdev);
4864
4865 /* Reset device */
4866 skb_queue_purge(&hdev->cmd_q);
4867 atomic_set(&hdev->cmd_cnt, 1);
4868 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
4869 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4870 set_bit(HCI_INIT, &hdev->flags);
4871 hci_reset_sync(hdev);
4872 clear_bit(HCI_INIT, &hdev->flags);
4873 }
4874
4875 /* flush cmd work */
4876 flush_work(&hdev->cmd_work);
4877
4878 /* Drop queues */
4879 skb_queue_purge(&hdev->rx_q);
4880 skb_queue_purge(&hdev->cmd_q);
4881 skb_queue_purge(&hdev->raw_q);
4882
4883 /* Drop last sent command */
4884 if (hdev->sent_cmd) {
4885 cancel_delayed_work_sync(&hdev->cmd_timer);
4886 kfree_skb(hdev->sent_cmd);
4887 hdev->sent_cmd = NULL;
4888 }
4889
4890 clear_bit(HCI_RUNNING, &hdev->flags);
4891 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4892
4893 /* After this point our queues are empty and no tasks are scheduled. */
4894 hdev->close(hdev);
4895
4896 /* Clear flags */
4897 hdev->flags &= BIT(HCI_RAW);
4898 hci_dev_clear_volatile_flags(hdev);
4899
4900 /* Controller radio is available but is currently powered down */
4901 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
4902
4903 memset(hdev->eir, 0, sizeof(hdev->eir));
4904 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
4905 bacpy(&hdev->random_addr, BDADDR_ANY);
4906
4907 hci_dev_put(hdev);
4908 return err;
4909}
4910
4911/* This function perform power on HCI command sequence as follows:
4912 *
4913 * If controller is already up (HCI_UP) performs hci_powered_update_sync
4914 * sequence otherwise run hci_dev_open_sync which will follow with
4915 * hci_powered_update_sync after the init sequence is completed.
4916 */
4917static int hci_power_on_sync(struct hci_dev *hdev)
4918{
4919 int err;
4920
4921 if (test_bit(HCI_UP, &hdev->flags) &&
4922 hci_dev_test_flag(hdev, HCI_MGMT) &&
4923 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
4924 cancel_delayed_work(&hdev->power_off);
4925 return hci_powered_update_sync(hdev);
4926 }
4927
4928 err = hci_dev_open_sync(hdev);
4929 if (err < 0)
4930 return err;
4931
4932 /* During the HCI setup phase, a few error conditions are
4933 * ignored and they need to be checked now. If they are still
4934 * valid, it is important to return the device back off.
4935 */
4936 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
4937 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
4938 (hdev->dev_type == HCI_PRIMARY &&
4939 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
4940 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
4941 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
4942 hci_dev_close_sync(hdev);
4943 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
4944 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
4945 HCI_AUTO_OFF_TIMEOUT);
4946 }
4947
4948 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
4949 /* For unconfigured devices, set the HCI_RAW flag
4950 * so that userspace can easily identify them.
4951 */
4952 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4953 set_bit(HCI_RAW, &hdev->flags);
4954
4955 /* For fully configured devices, this will send
4956 * the Index Added event. For unconfigured devices,
4957 * it will send Unconfigued Index Added event.
4958 *
4959 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
4960 * and no event will be send.
4961 */
4962 mgmt_index_added(hdev);
4963 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
4964 /* When the controller is now configured, then it
4965 * is important to clear the HCI_RAW flag.
4966 */
4967 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4968 clear_bit(HCI_RAW, &hdev->flags);
4969
4970 /* Powering on the controller with HCI_CONFIG set only
4971 * happens with the transition from unconfigured to
4972 * configured. This will send the Index Added event.
4973 */
4974 mgmt_index_added(hdev);
4975 }
4976
4977 return 0;
4978}
4979
4980static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
4981{
4982 struct hci_cp_remote_name_req_cancel cp;
4983
4984 memset(&cp, 0, sizeof(cp));
4985 bacpy(&cp.bdaddr, addr);
4986
4987 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
4988 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4989}
4990
4991int hci_stop_discovery_sync(struct hci_dev *hdev)
4992{
4993 struct discovery_state *d = &hdev->discovery;
4994 struct inquiry_entry *e;
4995 int err;
4996
4997 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
4998
4999 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
5000 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
5001 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
5002 0, NULL, HCI_CMD_TIMEOUT);
5003 if (err)
5004 return err;
5005 }
5006
5007 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5008 cancel_delayed_work(&hdev->le_scan_disable);
5009 cancel_delayed_work(&hdev->le_scan_restart);
5010
5011 err = hci_scan_disable_sync(hdev);
5012 if (err)
5013 return err;
5014 }
5015
5016 } else {
5017 err = hci_scan_disable_sync(hdev);
5018 if (err)
5019 return err;
5020 }
5021
5022 /* Resume advertising if it was paused */
5023 if (use_ll_privacy(hdev))
5024 hci_resume_advertising_sync(hdev);
5025
5026 /* No further actions needed for LE-only discovery */
5027 if (d->type == DISCOV_TYPE_LE)
5028 return 0;
5029
5030 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
5031 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
5032 NAME_PENDING);
5033 if (!e)
5034 return 0;
5035
5036 return hci_remote_name_cancel_sync(hdev, &e->data.bdaddr);
5037 }
5038
5039 return 0;
5040}
5041
5042static int hci_disconnect_phy_link_sync(struct hci_dev *hdev, u16 handle,
5043 u8 reason)
5044{
5045 struct hci_cp_disconn_phy_link cp;
5046
5047 memset(&cp, 0, sizeof(cp));
5048 cp.phy_handle = HCI_PHY_HANDLE(handle);
5049 cp.reason = reason;
5050
5051 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONN_PHY_LINK,
5052 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5053}
5054
5055static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
5056 u8 reason)
5057{
5058 struct hci_cp_disconnect cp;
5059
5060 if (conn->type == AMP_LINK)
5061 return hci_disconnect_phy_link_sync(hdev, conn->handle, reason);
5062
5063 memset(&cp, 0, sizeof(cp));
5064 cp.handle = cpu_to_le16(conn->handle);
5065 cp.reason = reason;
5066
5067 /* Wait for HCI_EV_DISCONN_COMPLETE not HCI_EV_CMD_STATUS when not
5068 * suspending.
5069 */
5070 if (!hdev->suspended)
5071 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
5072 sizeof(cp), &cp,
5073 HCI_EV_DISCONN_COMPLETE,
5074 HCI_CMD_TIMEOUT, NULL);
5075
5076 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
5077 HCI_CMD_TIMEOUT);
5078}
5079
5080static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
5081 struct hci_conn *conn)
5082{
5083 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
5084 return 0;
5085
5086 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
5087 6, &conn->dst, HCI_CMD_TIMEOUT);
5088}
5089
5090static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn)
5091{
5092 if (conn->type == LE_LINK)
5093 return hci_le_connect_cancel_sync(hdev, conn);
5094
5095 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
5096 return 0;
5097
5098 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
5099 6, &conn->dst, HCI_CMD_TIMEOUT);
5100}
5101
5102static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
5103 u8 reason)
5104{
5105 struct hci_cp_reject_sync_conn_req cp;
5106
5107 memset(&cp, 0, sizeof(cp));
5108 bacpy(&cp.bdaddr, &conn->dst);
5109 cp.reason = reason;
5110
5111 /* SCO rejection has its own limited set of
5112 * allowed error values (0x0D-0x0F).
5113 */
5114 if (reason < 0x0d || reason > 0x0f)
5115 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
5116
5117 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
5118 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5119}
5120
5121static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
5122 u8 reason)
5123{
5124 struct hci_cp_reject_conn_req cp;
5125
5126 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
5127 return hci_reject_sco_sync(hdev, conn, reason);
5128
5129 memset(&cp, 0, sizeof(cp));
5130 bacpy(&cp.bdaddr, &conn->dst);
5131 cp.reason = reason;
5132
5133 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
5134 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5135}
5136
5137int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
5138{
5139 int err;
5140
5141 switch (conn->state) {
5142 case BT_CONNECTED:
5143 case BT_CONFIG:
5144 return hci_disconnect_sync(hdev, conn, reason);
5145 case BT_CONNECT:
5146 err = hci_connect_cancel_sync(hdev, conn);
5147 /* Cleanup hci_conn object if it cannot be cancelled as it
5148 * likelly means the controller and host stack are out of sync.
5149 */
5150 if (err) {
5151 hci_dev_lock(hdev);
5152 hci_conn_failed(conn, err);
5153 hci_dev_unlock(hdev);
5154 }
5155 return err;
5156 case BT_CONNECT2:
5157 return hci_reject_conn_sync(hdev, conn, reason);
5158 default:
5159 conn->state = BT_CLOSED;
5160 break;
5161 }
5162
5163 return 0;
5164}
5165
5166static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
5167{
5168 struct hci_conn *conn, *tmp;
5169 int err;
5170
5171 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
5172 err = hci_abort_conn_sync(hdev, conn, reason);
5173 if (err)
5174 return err;
5175 }
5176
5177 return 0;
5178}
5179
5180/* This function perform power off HCI command sequence as follows:
5181 *
5182 * Clear Advertising
5183 * Stop Discovery
5184 * Disconnect all connections
5185 * hci_dev_close_sync
5186 */
5187static int hci_power_off_sync(struct hci_dev *hdev)
5188{
5189 int err;
5190
5191 /* If controller is already down there is nothing to do */
5192 if (!test_bit(HCI_UP, &hdev->flags))
5193 return 0;
5194
5195 if (test_bit(HCI_ISCAN, &hdev->flags) ||
5196 test_bit(HCI_PSCAN, &hdev->flags)) {
5197 err = hci_write_scan_enable_sync(hdev, 0x00);
5198 if (err)
5199 return err;
5200 }
5201
5202 err = hci_clear_adv_sync(hdev, NULL, false);
5203 if (err)
5204 return err;
5205
5206 err = hci_stop_discovery_sync(hdev);
5207 if (err)
5208 return err;
5209
5210 /* Terminated due to Power Off */
5211 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5212 if (err)
5213 return err;
5214
5215 return hci_dev_close_sync(hdev);
5216}
5217
5218int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
5219{
5220 if (val)
5221 return hci_power_on_sync(hdev);
5222
5223 return hci_power_off_sync(hdev);
5224}
5225
5226static int hci_write_iac_sync(struct hci_dev *hdev)
5227{
5228 struct hci_cp_write_current_iac_lap cp;
5229
5230 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
5231 return 0;
5232
5233 memset(&cp, 0, sizeof(cp));
5234
5235 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
5236 /* Limited discoverable mode */
5237 cp.num_iac = min_t(u8, hdev->num_iac, 2);
5238 cp.iac_lap[0] = 0x00; /* LIAC */
5239 cp.iac_lap[1] = 0x8b;
5240 cp.iac_lap[2] = 0x9e;
5241 cp.iac_lap[3] = 0x33; /* GIAC */
5242 cp.iac_lap[4] = 0x8b;
5243 cp.iac_lap[5] = 0x9e;
5244 } else {
5245 /* General discoverable mode */
5246 cp.num_iac = 1;
5247 cp.iac_lap[0] = 0x33; /* GIAC */
5248 cp.iac_lap[1] = 0x8b;
5249 cp.iac_lap[2] = 0x9e;
5250 }
5251
5252 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
5253 (cp.num_iac * 3) + 1, &cp,
5254 HCI_CMD_TIMEOUT);
5255}
5256
5257int hci_update_discoverable_sync(struct hci_dev *hdev)
5258{
5259 int err = 0;
5260
5261 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
5262 err = hci_write_iac_sync(hdev);
5263 if (err)
5264 return err;
5265
5266 err = hci_update_scan_sync(hdev);
5267 if (err)
5268 return err;
5269
5270 err = hci_update_class_sync(hdev);
5271 if (err)
5272 return err;
5273 }
5274
5275 /* Advertising instances don't use the global discoverable setting, so
5276 * only update AD if advertising was enabled using Set Advertising.
5277 */
5278 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
5279 err = hci_update_adv_data_sync(hdev, 0x00);
5280 if (err)
5281 return err;
5282
5283 /* Discoverable mode affects the local advertising
5284 * address in limited privacy mode.
5285 */
5286 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
5287 if (ext_adv_capable(hdev))
5288 err = hci_start_ext_adv_sync(hdev, 0x00);
5289 else
5290 err = hci_enable_advertising_sync(hdev);
5291 }
5292 }
5293
5294 return err;
5295}
5296
5297static int update_discoverable_sync(struct hci_dev *hdev, void *data)
5298{
5299 return hci_update_discoverable_sync(hdev);
5300}
5301
5302int hci_update_discoverable(struct hci_dev *hdev)
5303{
5304 /* Only queue if it would have any effect */
5305 if (hdev_is_powered(hdev) &&
5306 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
5307 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
5308 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
5309 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
5310 NULL);
5311
5312 return 0;
5313}
5314
5315int hci_update_connectable_sync(struct hci_dev *hdev)
5316{
5317 int err;
5318
5319 err = hci_update_scan_sync(hdev);
5320 if (err)
5321 return err;
5322
5323 /* If BR/EDR is not enabled and we disable advertising as a
5324 * by-product of disabling connectable, we need to update the
5325 * advertising flags.
5326 */
5327 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5328 err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
5329
5330 /* Update the advertising parameters if necessary */
5331 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
5332 !list_empty(&hdev->adv_instances)) {
5333 if (ext_adv_capable(hdev))
5334 err = hci_start_ext_adv_sync(hdev,
5335 hdev->cur_adv_instance);
5336 else
5337 err = hci_enable_advertising_sync(hdev);
5338
5339 if (err)
5340 return err;
5341 }
5342
5343 return hci_update_passive_scan_sync(hdev);
5344}
5345
5346static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
5347{
5348 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
5349 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
5350 struct hci_cp_inquiry cp;
5351
5352 bt_dev_dbg(hdev, "");
5353
5354 if (hci_dev_test_flag(hdev, HCI_INQUIRY))
5355 return 0;
5356
5357 hci_dev_lock(hdev);
5358 hci_inquiry_cache_flush(hdev);
5359 hci_dev_unlock(hdev);
5360
5361 memset(&cp, 0, sizeof(cp));
5362
5363 if (hdev->discovery.limited)
5364 memcpy(&cp.lap, liac, sizeof(cp.lap));
5365 else
5366 memcpy(&cp.lap, giac, sizeof(cp.lap));
5367
5368 cp.length = length;
5369
5370 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
5371 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5372}
5373
5374static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
5375{
5376 u8 own_addr_type;
5377 /* Accept list is not used for discovery */
5378 u8 filter_policy = 0x00;
5379 /* Default is to enable duplicates filter */
5380 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
5381 int err;
5382
5383 bt_dev_dbg(hdev, "");
5384
5385 /* If controller is scanning, it means the passive scanning is
5386 * running. Thus, we should temporarily stop it in order to set the
5387 * discovery scanning parameters.
5388 */
5389 err = hci_scan_disable_sync(hdev);
5390 if (err) {
5391 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
5392 return err;
5393 }
5394
5395 cancel_interleave_scan(hdev);
5396
5397 /* Pause advertising since active scanning disables address resolution
5398 * which advertising depend on in order to generate its RPAs.
5399 */
5400 if (use_ll_privacy(hdev) && hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5401 err = hci_pause_advertising_sync(hdev);
5402 if (err) {
5403 bt_dev_err(hdev, "pause advertising failed: %d", err);
5404 goto failed;
5405 }
5406 }
5407
5408 /* Disable address resolution while doing active scanning since the
5409 * accept list shall not be used and all reports shall reach the host
5410 * anyway.
5411 */
5412 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
5413 if (err) {
5414 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
5415 err);
5416 goto failed;
5417 }
5418
5419 /* All active scans will be done with either a resolvable private
5420 * address (when privacy feature has been enabled) or non-resolvable
5421 * private address.
5422 */
5423 err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
5424 &own_addr_type);
5425 if (err < 0)
5426 own_addr_type = ADDR_LE_DEV_PUBLIC;
5427
5428 if (hci_is_adv_monitoring(hdev)) {
5429 /* Duplicate filter should be disabled when some advertisement
5430 * monitor is activated, otherwise AdvMon can only receive one
5431 * advertisement for one peer(*) during active scanning, and
5432 * might report loss to these peers.
5433 *
5434 * Note that different controllers have different meanings of
5435 * |duplicate|. Some of them consider packets with the same
5436 * address as duplicate, and others consider packets with the
5437 * same address and the same RSSI as duplicate. Although in the
5438 * latter case we don't need to disable duplicate filter, but
5439 * it is common to have active scanning for a short period of
5440 * time, the power impact should be neglectable.
5441 */
5442 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
5443 }
5444
5445 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
5446 hdev->le_scan_window_discovery,
5447 own_addr_type, filter_policy, filter_dup);
5448 if (!err)
5449 return err;
5450
5451failed:
5452 /* Resume advertising if it was paused */
5453 if (use_ll_privacy(hdev))
5454 hci_resume_advertising_sync(hdev);
5455
5456 /* Resume passive scanning */
5457 hci_update_passive_scan_sync(hdev);
5458 return err;
5459}
5460
5461static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
5462{
5463 int err;
5464
5465 bt_dev_dbg(hdev, "");
5466
5467 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
5468 if (err)
5469 return err;
5470
5471 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5472}
5473
5474int hci_start_discovery_sync(struct hci_dev *hdev)
5475{
5476 unsigned long timeout;
5477 int err;
5478
5479 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
5480
5481 switch (hdev->discovery.type) {
5482 case DISCOV_TYPE_BREDR:
5483 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5484 case DISCOV_TYPE_INTERLEAVED:
5485 /* When running simultaneous discovery, the LE scanning time
5486 * should occupy the whole discovery time sine BR/EDR inquiry
5487 * and LE scanning are scheduled by the controller.
5488 *
5489 * For interleaving discovery in comparison, BR/EDR inquiry
5490 * and LE scanning are done sequentially with separate
5491 * timeouts.
5492 */
5493 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
5494 &hdev->quirks)) {
5495 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5496 /* During simultaneous discovery, we double LE scan
5497 * interval. We must leave some time for the controller
5498 * to do BR/EDR inquiry.
5499 */
5500 err = hci_start_interleaved_discovery_sync(hdev);
5501 break;
5502 }
5503
5504 timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
5505 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5506 break;
5507 case DISCOV_TYPE_LE:
5508 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5509 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5510 break;
5511 default:
5512 return -EINVAL;
5513 }
5514
5515 if (err)
5516 return err;
5517
5518 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
5519
5520 /* When service discovery is used and the controller has a
5521 * strict duplicate filter, it is important to remember the
5522 * start and duration of the scan. This is required for
5523 * restarting scanning during the discovery phase.
5524 */
5525 if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
5526 hdev->discovery.result_filtering) {
5527 hdev->discovery.scan_start = jiffies;
5528 hdev->discovery.scan_duration = timeout;
5529 }
5530
5531 queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
5532 timeout);
5533 return 0;
5534}
5535
5536static void hci_suspend_monitor_sync(struct hci_dev *hdev)
5537{
5538 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5539 case HCI_ADV_MONITOR_EXT_MSFT:
5540 msft_suspend_sync(hdev);
5541 break;
5542 default:
5543 return;
5544 }
5545}
5546
5547/* This function disables discovery and mark it as paused */
5548static int hci_pause_discovery_sync(struct hci_dev *hdev)
5549{
5550 int old_state = hdev->discovery.state;
5551 int err;
5552
5553 /* If discovery already stopped/stopping/paused there nothing to do */
5554 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
5555 hdev->discovery_paused)
5556 return 0;
5557
5558 hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
5559 err = hci_stop_discovery_sync(hdev);
5560 if (err)
5561 return err;
5562
5563 hdev->discovery_paused = true;
5564 hdev->discovery_old_state = old_state;
5565 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
5566
5567 return 0;
5568}
5569
5570static int hci_update_event_filter_sync(struct hci_dev *hdev)
5571{
5572 struct bdaddr_list_with_flags *b;
5573 u8 scan = SCAN_DISABLED;
5574 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
5575 int err;
5576
5577 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5578 return 0;
5579
5580 /* Some fake CSR controllers lock up after setting this type of
5581 * filter, so avoid sending the request altogether.
5582 */
5583 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
5584 return 0;
5585
5586 /* Always clear event filter when starting */
5587 hci_clear_event_filter_sync(hdev);
5588
5589 list_for_each_entry(b, &hdev->accept_list, list) {
5590 if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
5591 continue;
5592
5593 bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
5594
5595 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
5596 HCI_CONN_SETUP_ALLOW_BDADDR,
5597 &b->bdaddr,
5598 HCI_CONN_SETUP_AUTO_ON);
5599 if (err)
5600 bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
5601 &b->bdaddr);
5602 else
5603 scan = SCAN_PAGE;
5604 }
5605
5606 if (scan && !scanning)
5607 hci_write_scan_enable_sync(hdev, scan);
5608 else if (!scan && scanning)
5609 hci_write_scan_enable_sync(hdev, scan);
5610
5611 return 0;
5612}
5613
5614/* This function disables scan (BR and LE) and mark it as paused */
5615static int hci_pause_scan_sync(struct hci_dev *hdev)
5616{
5617 if (hdev->scanning_paused)
5618 return 0;
5619
5620 /* Disable page scan if enabled */
5621 if (test_bit(HCI_PSCAN, &hdev->flags))
5622 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
5623
5624 hci_scan_disable_sync(hdev);
5625
5626 hdev->scanning_paused = true;
5627
5628 return 0;
5629}
5630
5631/* This function performs the HCI suspend procedures in the follow order:
5632 *
5633 * Pause discovery (active scanning/inquiry)
5634 * Pause Directed Advertising/Advertising
5635 * Pause Scanning (passive scanning in case discovery was not active)
5636 * Disconnect all connections
5637 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
5638 * otherwise:
5639 * Update event mask (only set events that are allowed to wake up the host)
5640 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
5641 * Update passive scanning (lower duty cycle)
5642 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
5643 */
5644int hci_suspend_sync(struct hci_dev *hdev)
5645{
5646 int err;
5647
5648 /* If marked as suspended there nothing to do */
5649 if (hdev->suspended)
5650 return 0;
5651
5652 /* Mark device as suspended */
5653 hdev->suspended = true;
5654
5655 /* Pause discovery if not already stopped */
5656 hci_pause_discovery_sync(hdev);
5657
5658 /* Pause other advertisements */
5659 hci_pause_advertising_sync(hdev);
5660
5661 /* Suspend monitor filters */
5662 hci_suspend_monitor_sync(hdev);
5663
5664 /* Prevent disconnects from causing scanning to be re-enabled */
5665 hci_pause_scan_sync(hdev);
5666
5667 if (hci_conn_count(hdev)) {
5668 /* Soft disconnect everything (power off) */
5669 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5670 if (err) {
5671 /* Set state to BT_RUNNING so resume doesn't notify */
5672 hdev->suspend_state = BT_RUNNING;
5673 hci_resume_sync(hdev);
5674 return err;
5675 }
5676
5677 /* Update event mask so only the allowed event can wakeup the
5678 * host.
5679 */
5680 hci_set_event_mask_sync(hdev);
5681 }
5682
5683 /* Only configure accept list if disconnect succeeded and wake
5684 * isn't being prevented.
5685 */
5686 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
5687 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
5688 return 0;
5689 }
5690
5691 /* Unpause to take care of updating scanning params */
5692 hdev->scanning_paused = false;
5693
5694 /* Enable event filter for paired devices */
5695 hci_update_event_filter_sync(hdev);
5696
5697 /* Update LE passive scan if enabled */
5698 hci_update_passive_scan_sync(hdev);
5699
5700 /* Pause scan changes again. */
5701 hdev->scanning_paused = true;
5702
5703 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
5704
5705 return 0;
5706}
5707
5708/* This function resumes discovery */
5709static int hci_resume_discovery_sync(struct hci_dev *hdev)
5710{
5711 int err;
5712
5713 /* If discovery not paused there nothing to do */
5714 if (!hdev->discovery_paused)
5715 return 0;
5716
5717 hdev->discovery_paused = false;
5718
5719 hci_discovery_set_state(hdev, DISCOVERY_STARTING);
5720
5721 err = hci_start_discovery_sync(hdev);
5722
5723 hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
5724 DISCOVERY_FINDING);
5725
5726 return err;
5727}
5728
5729static void hci_resume_monitor_sync(struct hci_dev *hdev)
5730{
5731 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5732 case HCI_ADV_MONITOR_EXT_MSFT:
5733 msft_resume_sync(hdev);
5734 break;
5735 default:
5736 return;
5737 }
5738}
5739
5740/* This function resume scan and reset paused flag */
5741static int hci_resume_scan_sync(struct hci_dev *hdev)
5742{
5743 if (!hdev->scanning_paused)
5744 return 0;
5745
5746 hdev->scanning_paused = false;
5747
5748 hci_update_scan_sync(hdev);
5749
5750 /* Reset passive scanning to normal */
5751 hci_update_passive_scan_sync(hdev);
5752
5753 return 0;
5754}
5755
5756/* This function performs the HCI suspend procedures in the follow order:
5757 *
5758 * Restore event mask
5759 * Clear event filter
5760 * Update passive scanning (normal duty cycle)
5761 * Resume Directed Advertising/Advertising
5762 * Resume discovery (active scanning/inquiry)
5763 */
5764int hci_resume_sync(struct hci_dev *hdev)
5765{
5766 /* If not marked as suspended there nothing to do */
5767 if (!hdev->suspended)
5768 return 0;
5769
5770 hdev->suspended = false;
5771
5772 /* Restore event mask */
5773 hci_set_event_mask_sync(hdev);
5774
5775 /* Clear any event filters and restore scan state */
5776 hci_clear_event_filter_sync(hdev);
5777
5778 /* Resume scanning */
5779 hci_resume_scan_sync(hdev);
5780
5781 /* Resume monitor filters */
5782 hci_resume_monitor_sync(hdev);
5783
5784 /* Resume other advertisements */
5785 hci_resume_advertising_sync(hdev);
5786
5787 /* Resume discovery */
5788 hci_resume_discovery_sync(hdev);
5789
5790 return 0;
5791}
5792
5793static bool conn_use_rpa(struct hci_conn *conn)
5794{
5795 struct hci_dev *hdev = conn->hdev;
5796
5797 return hci_dev_test_flag(hdev, HCI_PRIVACY);
5798}
5799
5800static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
5801 struct hci_conn *conn)
5802{
5803 struct hci_cp_le_set_ext_adv_params cp;
5804 int err;
5805 bdaddr_t random_addr;
5806 u8 own_addr_type;
5807
5808 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5809 &own_addr_type);
5810 if (err)
5811 return err;
5812
5813 /* Set require_privacy to false so that the remote device has a
5814 * chance of identifying us.
5815 */
5816 err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
5817 &own_addr_type, &random_addr);
5818 if (err)
5819 return err;
5820
5821 memset(&cp, 0, sizeof(cp));
5822
5823 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
5824 cp.own_addr_type = own_addr_type;
5825 cp.channel_map = hdev->le_adv_channel_map;
5826 cp.tx_power = HCI_TX_POWER_INVALID;
5827 cp.primary_phy = HCI_ADV_PHY_1M;
5828 cp.secondary_phy = HCI_ADV_PHY_1M;
5829 cp.handle = 0x00; /* Use instance 0 for directed adv */
5830 cp.own_addr_type = own_addr_type;
5831 cp.peer_addr_type = conn->dst_type;
5832 bacpy(&cp.peer_addr, &conn->dst);
5833
5834 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
5835 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
5836 * does not supports advertising data when the advertising set already
5837 * contains some, the controller shall return erroc code 'Invalid
5838 * HCI Command Parameters(0x12).
5839 * So it is required to remove adv set for handle 0x00. since we use
5840 * instance 0 for directed adv.
5841 */
5842 err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
5843 if (err)
5844 return err;
5845
5846 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
5847 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5848 if (err)
5849 return err;
5850
5851 /* Check if random address need to be updated */
5852 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
5853 bacmp(&random_addr, BDADDR_ANY) &&
5854 bacmp(&random_addr, &hdev->random_addr)) {
5855 err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
5856 &random_addr);
5857 if (err)
5858 return err;
5859 }
5860
5861 return hci_enable_ext_advertising_sync(hdev, 0x00);
5862}
5863
5864static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
5865 struct hci_conn *conn)
5866{
5867 struct hci_cp_le_set_adv_param cp;
5868 u8 status;
5869 u8 own_addr_type;
5870 u8 enable;
5871
5872 if (ext_adv_capable(hdev))
5873 return hci_le_ext_directed_advertising_sync(hdev, conn);
5874
5875 /* Clear the HCI_LE_ADV bit temporarily so that the
5876 * hci_update_random_address knows that it's safe to go ahead
5877 * and write a new random address. The flag will be set back on
5878 * as soon as the SET_ADV_ENABLE HCI command completes.
5879 */
5880 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5881
5882 /* Set require_privacy to false so that the remote device has a
5883 * chance of identifying us.
5884 */
5885 status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5886 &own_addr_type);
5887 if (status)
5888 return status;
5889
5890 memset(&cp, 0, sizeof(cp));
5891
5892 /* Some controllers might reject command if intervals are not
5893 * within range for undirected advertising.
5894 * BCM20702A0 is known to be affected by this.
5895 */
5896 cp.min_interval = cpu_to_le16(0x0020);
5897 cp.max_interval = cpu_to_le16(0x0020);
5898
5899 cp.type = LE_ADV_DIRECT_IND;
5900 cp.own_address_type = own_addr_type;
5901 cp.direct_addr_type = conn->dst_type;
5902 bacpy(&cp.direct_addr, &conn->dst);
5903 cp.channel_map = hdev->le_adv_channel_map;
5904
5905 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
5906 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5907 if (status)
5908 return status;
5909
5910 enable = 0x01;
5911
5912 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
5913 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
5914}
5915
5916static void set_ext_conn_params(struct hci_conn *conn,
5917 struct hci_cp_le_ext_conn_param *p)
5918{
5919 struct hci_dev *hdev = conn->hdev;
5920
5921 memset(p, 0, sizeof(*p));
5922
5923 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
5924 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
5925 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
5926 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
5927 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
5928 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
5929 p->min_ce_len = cpu_to_le16(0x0000);
5930 p->max_ce_len = cpu_to_le16(0x0000);
5931}
5932
5933static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
5934 struct hci_conn *conn, u8 own_addr_type)
5935{
5936 struct hci_cp_le_ext_create_conn *cp;
5937 struct hci_cp_le_ext_conn_param *p;
5938 u8 data[sizeof(*cp) + sizeof(*p) * 3];
5939 u32 plen;
5940
5941 cp = (void *)data;
5942 p = (void *)cp->data;
5943
5944 memset(cp, 0, sizeof(*cp));
5945
5946 bacpy(&cp->peer_addr, &conn->dst);
5947 cp->peer_addr_type = conn->dst_type;
5948 cp->own_addr_type = own_addr_type;
5949
5950 plen = sizeof(*cp);
5951
5952 if (scan_1m(hdev)) {
5953 cp->phys |= LE_SCAN_PHY_1M;
5954 set_ext_conn_params(conn, p);
5955
5956 p++;
5957 plen += sizeof(*p);
5958 }
5959
5960 if (scan_2m(hdev)) {
5961 cp->phys |= LE_SCAN_PHY_2M;
5962 set_ext_conn_params(conn, p);
5963
5964 p++;
5965 plen += sizeof(*p);
5966 }
5967
5968 if (scan_coded(hdev)) {
5969 cp->phys |= LE_SCAN_PHY_CODED;
5970 set_ext_conn_params(conn, p);
5971
5972 plen += sizeof(*p);
5973 }
5974
5975 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
5976 plen, data,
5977 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
5978 conn->conn_timeout, NULL);
5979}
5980
5981int hci_le_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn)
5982{
5983 struct hci_cp_le_create_conn cp;
5984 struct hci_conn_params *params;
5985 u8 own_addr_type;
5986 int err;
5987
5988 /* If requested to connect as peripheral use directed advertising */
5989 if (conn->role == HCI_ROLE_SLAVE) {
5990 /* If we're active scanning and simultaneous roles is not
5991 * enabled simply reject the attempt.
5992 */
5993 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
5994 hdev->le_scan_type == LE_SCAN_ACTIVE &&
5995 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
5996 hci_conn_del(conn);
5997 return -EBUSY;
5998 }
5999
6000 /* Pause advertising while doing directed advertising. */
6001 hci_pause_advertising_sync(hdev);
6002
6003 err = hci_le_directed_advertising_sync(hdev, conn);
6004 goto done;
6005 }
6006
6007 /* Disable advertising if simultaneous roles is not in use. */
6008 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
6009 hci_pause_advertising_sync(hdev);
6010
6011 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
6012 if (params) {
6013 conn->le_conn_min_interval = params->conn_min_interval;
6014 conn->le_conn_max_interval = params->conn_max_interval;
6015 conn->le_conn_latency = params->conn_latency;
6016 conn->le_supv_timeout = params->supervision_timeout;
6017 } else {
6018 conn->le_conn_min_interval = hdev->le_conn_min_interval;
6019 conn->le_conn_max_interval = hdev->le_conn_max_interval;
6020 conn->le_conn_latency = hdev->le_conn_latency;
6021 conn->le_supv_timeout = hdev->le_supv_timeout;
6022 }
6023
6024 /* If controller is scanning, we stop it since some controllers are
6025 * not able to scan and connect at the same time. Also set the
6026 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
6027 * handler for scan disabling knows to set the correct discovery
6028 * state.
6029 */
6030 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
6031 hci_scan_disable_sync(hdev);
6032 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
6033 }
6034
6035 /* Update random address, but set require_privacy to false so
6036 * that we never connect with an non-resolvable address.
6037 */
6038 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6039 &own_addr_type);
6040 if (err)
6041 goto done;
6042
6043 if (use_ext_conn(hdev)) {
6044 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
6045 goto done;
6046 }
6047
6048 memset(&cp, 0, sizeof(cp));
6049
6050 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6051 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6052
6053 bacpy(&cp.peer_addr, &conn->dst);
6054 cp.peer_addr_type = conn->dst_type;
6055 cp.own_address_type = own_addr_type;
6056 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6057 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6058 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
6059 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6060 cp.min_ce_len = cpu_to_le16(0x0000);
6061 cp.max_ce_len = cpu_to_le16(0x0000);
6062
6063 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
6064 *
6065 * If this event is unmasked and the HCI_LE_Connection_Complete event
6066 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
6067 * sent when a new connection has been created.
6068 */
6069 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
6070 sizeof(cp), &cp,
6071 use_enhanced_conn_complete(hdev) ?
6072 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
6073 HCI_EV_LE_CONN_COMPLETE,
6074 conn->conn_timeout, NULL);
6075
6076done:
6077 /* Re-enable advertising after the connection attempt is finished. */
6078 hci_resume_advertising_sync(hdev);
6079 return err;
6080}
6081
6082int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle)
6083{
6084 struct hci_cp_le_remove_cig cp;
6085
6086 memset(&cp, 0, sizeof(cp));
6087 cp.cig_id = handle;
6088
6089 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp),
6090 &cp, HCI_CMD_TIMEOUT);
6091}
6092
6093int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle)
6094{
6095 struct hci_cp_le_big_term_sync cp;
6096
6097 memset(&cp, 0, sizeof(cp));
6098 cp.handle = handle;
6099
6100 return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC,
6101 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6102}
6103
6104int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
6105{
6106 struct hci_cp_le_pa_term_sync cp;
6107
6108 memset(&cp, 0, sizeof(cp));
6109 cp.handle = cpu_to_le16(handle);
6110
6111 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
6112 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6113}
6114
6115int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
6116 bool use_rpa, struct adv_info *adv_instance,
6117 u8 *own_addr_type, bdaddr_t *rand_addr)
6118{
6119 int err;
6120
6121 bacpy(rand_addr, BDADDR_ANY);
6122
6123 /* If privacy is enabled use a resolvable private address. If
6124 * current RPA has expired then generate a new one.
6125 */
6126 if (use_rpa) {
6127 /* If Controller supports LL Privacy use own address type is
6128 * 0x03
6129 */
6130 if (use_ll_privacy(hdev))
6131 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
6132 else
6133 *own_addr_type = ADDR_LE_DEV_RANDOM;
6134
6135 if (adv_instance) {
6136 if (adv_rpa_valid(adv_instance))
6137 return 0;
6138 } else {
6139 if (rpa_valid(hdev))
6140 return 0;
6141 }
6142
6143 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
6144 if (err < 0) {
6145 bt_dev_err(hdev, "failed to generate new RPA");
6146 return err;
6147 }
6148
6149 bacpy(rand_addr, &hdev->rpa);
6150
6151 return 0;
6152 }
6153
6154 /* In case of required privacy without resolvable private address,
6155 * use an non-resolvable private address. This is useful for
6156 * non-connectable advertising.
6157 */
6158 if (require_privacy) {
6159 bdaddr_t nrpa;
6160
6161 while (true) {
6162 /* The non-resolvable private address is generated
6163 * from random six bytes with the two most significant
6164 * bits cleared.
6165 */
6166 get_random_bytes(&nrpa, 6);
6167 nrpa.b[5] &= 0x3f;
6168
6169 /* The non-resolvable private address shall not be
6170 * equal to the public address.
6171 */
6172 if (bacmp(&hdev->bdaddr, &nrpa))
6173 break;
6174 }
6175
6176 *own_addr_type = ADDR_LE_DEV_RANDOM;
6177 bacpy(rand_addr, &nrpa);
6178
6179 return 0;
6180 }
6181
6182 /* No privacy so use a public address. */
6183 *own_addr_type = ADDR_LE_DEV_PUBLIC;
6184
6185 return 0;
6186}
6187
6188static int _update_adv_data_sync(struct hci_dev *hdev, void *data)
6189{
6190 u8 instance = PTR_ERR(data);
6191
6192 return hci_update_adv_data_sync(hdev, instance);
6193}
6194
6195int hci_update_adv_data(struct hci_dev *hdev, u8 instance)
6196{
6197 return hci_cmd_sync_queue(hdev, _update_adv_data_sync,
6198 ERR_PTR(instance), NULL);
6199}