1// SPDX-License-Identifier: GPL-2.0
2/*
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2021 Intel Corporation
6 * Copyright 2023 NXP
7 */
8
9#include <linux/property.h>
10
11#include <net/bluetooth/bluetooth.h>
12#include <net/bluetooth/hci_core.h>
13#include <net/bluetooth/mgmt.h>
14
15#include "hci_request.h"
16#include "hci_codec.h"
17#include "hci_debugfs.h"
18#include "smp.h"
19#include "eir.h"
20#include "msft.h"
21#include "aosp.h"
22#include "leds.h"
23
24static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
25 struct sk_buff *skb)
26{
27 bt_dev_dbg(hdev, "result 0x%2.2x", result);
28
29 if (hdev->req_status != HCI_REQ_PEND)
30 return;
31
32 hdev->req_result = result;
33 hdev->req_status = HCI_REQ_DONE;
34
35 /* Free the request command so it is not used as response */
36 kfree_skb(skb: hdev->req_skb);
37 hdev->req_skb = NULL;
38
39 if (skb) {
40 struct sock *sk = hci_skb_sk(skb);
41
42 /* Drop sk reference if set */
43 if (sk)
44 sock_put(sk);
45
46 hdev->req_rsp = skb_get(skb);
47 }
48
49 wake_up_interruptible(&hdev->req_wait_q);
50}
51
52static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode,
53 u32 plen, const void *param,
54 struct sock *sk)
55{
56 int len = HCI_COMMAND_HDR_SIZE + plen;
57 struct hci_command_hdr *hdr;
58 struct sk_buff *skb;
59
60 skb = bt_skb_alloc(len, GFP_ATOMIC);
61 if (!skb)
62 return NULL;
63
64 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
65 hdr->opcode = cpu_to_le16(opcode);
66 hdr->plen = plen;
67
68 if (plen)
69 skb_put_data(skb, data: param, len: plen);
70
71 bt_dev_dbg(hdev, "skb len %d", skb->len);
72
73 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
74 hci_skb_opcode(skb) = opcode;
75
76 /* Grab a reference if command needs to be associated with a sock (e.g.
77 * likely mgmt socket that initiated the command).
78 */
79 if (sk) {
80 hci_skb_sk(skb) = sk;
81 sock_hold(sk);
82 }
83
84 return skb;
85}
86
87static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
88 const void *param, u8 event, struct sock *sk)
89{
90 struct hci_dev *hdev = req->hdev;
91 struct sk_buff *skb;
92
93 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
94
95 /* If an error occurred during request building, there is no point in
96 * queueing the HCI command. We can simply return.
97 */
98 if (req->err)
99 return;
100
101 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
102 if (!skb) {
103 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
104 opcode);
105 req->err = -ENOMEM;
106 return;
107 }
108
109 if (skb_queue_empty(list: &req->cmd_q))
110 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
111
112 hci_skb_event(skb) = event;
113
114 skb_queue_tail(list: &req->cmd_q, newsk: skb);
115}
116
117static int hci_cmd_sync_run(struct hci_request *req)
118{
119 struct hci_dev *hdev = req->hdev;
120 struct sk_buff *skb;
121 unsigned long flags;
122
123 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
124
125 /* If an error occurred during request building, remove all HCI
126 * commands queued on the HCI request queue.
127 */
128 if (req->err) {
129 skb_queue_purge(list: &req->cmd_q);
130 return req->err;
131 }
132
133 /* Do not allow empty requests */
134 if (skb_queue_empty(list: &req->cmd_q))
135 return -ENODATA;
136
137 skb = skb_peek_tail(list_: &req->cmd_q);
138 bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
139 bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
140
141 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
142 skb_queue_splice_tail(list: &req->cmd_q, head: &hdev->cmd_q);
143 spin_unlock_irqrestore(lock: &hdev->cmd_q.lock, flags);
144
145 queue_work(wq: hdev->workqueue, work: &hdev->cmd_work);
146
147 return 0;
148}
149
150/* This function requires the caller holds hdev->req_lock. */
151struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
152 const void *param, u8 event, u32 timeout,
153 struct sock *sk)
154{
155 struct hci_request req;
156 struct sk_buff *skb;
157 int err = 0;
158
159 bt_dev_dbg(hdev, "Opcode 0x%4.4x", opcode);
160
161 hci_req_init(req: &req, hdev);
162
163 hci_cmd_sync_add(req: &req, opcode, plen, param, event, sk);
164
165 hdev->req_status = HCI_REQ_PEND;
166
167 err = hci_cmd_sync_run(req: &req);
168 if (err < 0)
169 return ERR_PTR(error: err);
170
171 err = wait_event_interruptible_timeout(hdev->req_wait_q,
172 hdev->req_status != HCI_REQ_PEND,
173 timeout);
174
175 if (err == -ERESTARTSYS)
176 return ERR_PTR(error: -EINTR);
177
178 switch (hdev->req_status) {
179 case HCI_REQ_DONE:
180 err = -bt_to_errno(code: hdev->req_result);
181 break;
182
183 case HCI_REQ_CANCELED:
184 err = -hdev->req_result;
185 break;
186
187 default:
188 err = -ETIMEDOUT;
189 break;
190 }
191
192 hdev->req_status = 0;
193 hdev->req_result = 0;
194 skb = hdev->req_rsp;
195 hdev->req_rsp = NULL;
196
197 bt_dev_dbg(hdev, "end: err %d", err);
198
199 if (err < 0) {
200 kfree_skb(skb);
201 return ERR_PTR(error: err);
202 }
203
204 return skb;
205}
206EXPORT_SYMBOL(__hci_cmd_sync_sk);
207
208/* This function requires the caller holds hdev->req_lock. */
209struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
210 const void *param, u32 timeout)
211{
212 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
213}
214EXPORT_SYMBOL(__hci_cmd_sync);
215
216/* Send HCI command and wait for command complete event */
217struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
218 const void *param, u32 timeout)
219{
220 struct sk_buff *skb;
221
222 if (!test_bit(HCI_UP, &hdev->flags))
223 return ERR_PTR(error: -ENETDOWN);
224
225 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
226
227 hci_req_sync_lock(hdev);
228 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
229 hci_req_sync_unlock(hdev);
230
231 return skb;
232}
233EXPORT_SYMBOL(hci_cmd_sync);
234
235/* This function requires the caller holds hdev->req_lock. */
236struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
237 const void *param, u8 event, u32 timeout)
238{
239 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
240 NULL);
241}
242EXPORT_SYMBOL(__hci_cmd_sync_ev);
243
244/* This function requires the caller holds hdev->req_lock. */
245int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
246 const void *param, u8 event, u32 timeout,
247 struct sock *sk)
248{
249 struct sk_buff *skb;
250 u8 status;
251
252 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
253 if (IS_ERR(ptr: skb)) {
254 if (!event)
255 bt_dev_err(hdev, "Opcode 0x%4.4x failed: %ld", opcode,
256 PTR_ERR(skb));
257 return PTR_ERR(ptr: skb);
258 }
259
260 /* If command return a status event skb will be set to NULL as there are
261 * no parameters, in case of failure IS_ERR(skb) would have be set to
262 * the actual error would be found with PTR_ERR(skb).
263 */
264 if (!skb)
265 return 0;
266
267 status = skb->data[0];
268
269 kfree_skb(skb);
270
271 return status;
272}
273EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
274
275int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
276 const void *param, u32 timeout)
277{
278 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
279 NULL);
280}
281EXPORT_SYMBOL(__hci_cmd_sync_status);
282
283static void hci_cmd_sync_work(struct work_struct *work)
284{
285 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
286
287 bt_dev_dbg(hdev, "");
288
289 /* Dequeue all entries and run them */
290 while (1) {
291 struct hci_cmd_sync_work_entry *entry;
292
293 mutex_lock(&hdev->cmd_sync_work_lock);
294 entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
295 struct hci_cmd_sync_work_entry,
296 list);
297 if (entry)
298 list_del(entry: &entry->list);
299 mutex_unlock(lock: &hdev->cmd_sync_work_lock);
300
301 if (!entry)
302 break;
303
304 bt_dev_dbg(hdev, "entry %p", entry);
305
306 if (entry->func) {
307 int err;
308
309 hci_req_sync_lock(hdev);
310 err = entry->func(hdev, entry->data);
311 if (entry->destroy)
312 entry->destroy(hdev, entry->data, err);
313 hci_req_sync_unlock(hdev);
314 }
315
316 kfree(objp: entry);
317 }
318}
319
320static void hci_cmd_sync_cancel_work(struct work_struct *work)
321{
322 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
323
324 cancel_delayed_work_sync(dwork: &hdev->cmd_timer);
325 cancel_delayed_work_sync(dwork: &hdev->ncmd_timer);
326 atomic_set(v: &hdev->cmd_cnt, i: 1);
327
328 wake_up_interruptible(&hdev->req_wait_q);
329}
330
331static int hci_scan_disable_sync(struct hci_dev *hdev);
332static int scan_disable_sync(struct hci_dev *hdev, void *data)
333{
334 return hci_scan_disable_sync(hdev);
335}
336
337static int hci_inquiry_sync(struct hci_dev *hdev, u8 length);
338static int interleaved_inquiry_sync(struct hci_dev *hdev, void *data)
339{
340 return hci_inquiry_sync(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN);
341}
342
343static void le_scan_disable(struct work_struct *work)
344{
345 struct hci_dev *hdev = container_of(work, struct hci_dev,
346 le_scan_disable.work);
347 int status;
348
349 bt_dev_dbg(hdev, "");
350 hci_dev_lock(hdev);
351
352 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
353 goto _return;
354
355 status = hci_cmd_sync_queue(hdev, func: scan_disable_sync, NULL, NULL);
356 if (status) {
357 bt_dev_err(hdev, "failed to disable LE scan: %d", status);
358 goto _return;
359 }
360
361 hdev->discovery.scan_start = 0;
362
363 /* If we were running LE only scan, change discovery state. If
364 * we were running both LE and BR/EDR inquiry simultaneously,
365 * and BR/EDR inquiry is already finished, stop discovery,
366 * otherwise BR/EDR inquiry will stop discovery when finished.
367 * If we will resolve remote device name, do not change
368 * discovery state.
369 */
370
371 if (hdev->discovery.type == DISCOV_TYPE_LE)
372 goto discov_stopped;
373
374 if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED)
375 goto _return;
376
377 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) {
378 if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
379 hdev->discovery.state != DISCOVERY_RESOLVING)
380 goto discov_stopped;
381
382 goto _return;
383 }
384
385 status = hci_cmd_sync_queue(hdev, func: interleaved_inquiry_sync, NULL, NULL);
386 if (status) {
387 bt_dev_err(hdev, "inquiry failed: status %d", status);
388 goto discov_stopped;
389 }
390
391 goto _return;
392
393discov_stopped:
394 hci_discovery_set_state(hdev, state: DISCOVERY_STOPPED);
395
396_return:
397 hci_dev_unlock(hdev);
398}
399
400static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
401 u8 filter_dup);
402
403static int reenable_adv_sync(struct hci_dev *hdev, void *data)
404{
405 bt_dev_dbg(hdev, "");
406
407 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
408 list_empty(head: &hdev->adv_instances))
409 return 0;
410
411 if (hdev->cur_adv_instance) {
412 return hci_schedule_adv_instance_sync(hdev,
413 instance: hdev->cur_adv_instance,
414 force: true);
415 } else {
416 if (ext_adv_capable(hdev)) {
417 hci_start_ext_adv_sync(hdev, instance: 0x00);
418 } else {
419 hci_update_adv_data_sync(hdev, instance: 0x00);
420 hci_update_scan_rsp_data_sync(hdev, instance: 0x00);
421 hci_enable_advertising_sync(hdev);
422 }
423 }
424
425 return 0;
426}
427
428static void reenable_adv(struct work_struct *work)
429{
430 struct hci_dev *hdev = container_of(work, struct hci_dev,
431 reenable_adv_work);
432 int status;
433
434 bt_dev_dbg(hdev, "");
435
436 hci_dev_lock(hdev);
437
438 status = hci_cmd_sync_queue(hdev, func: reenable_adv_sync, NULL, NULL);
439 if (status)
440 bt_dev_err(hdev, "failed to reenable ADV: %d", status);
441
442 hci_dev_unlock(hdev);
443}
444
445static void cancel_adv_timeout(struct hci_dev *hdev)
446{
447 if (hdev->adv_instance_timeout) {
448 hdev->adv_instance_timeout = 0;
449 cancel_delayed_work(dwork: &hdev->adv_instance_expire);
450 }
451}
452
453/* For a single instance:
454 * - force == true: The instance will be removed even when its remaining
455 * lifetime is not zero.
456 * - force == false: the instance will be deactivated but kept stored unless
457 * the remaining lifetime is zero.
458 *
459 * For instance == 0x00:
460 * - force == true: All instances will be removed regardless of their timeout
461 * setting.
462 * - force == false: Only instances that have a timeout will be removed.
463 */
464int hci_clear_adv_instance_sync(struct hci_dev *hdev, struct sock *sk,
465 u8 instance, bool force)
466{
467 struct adv_info *adv_instance, *n, *next_instance = NULL;
468 int err;
469 u8 rem_inst;
470
471 /* Cancel any timeout concerning the removed instance(s). */
472 if (!instance || hdev->cur_adv_instance == instance)
473 cancel_adv_timeout(hdev);
474
475 /* Get the next instance to advertise BEFORE we remove
476 * the current one. This can be the same instance again
477 * if there is only one instance.
478 */
479 if (instance && hdev->cur_adv_instance == instance)
480 next_instance = hci_get_next_instance(hdev, instance);
481
482 if (instance == 0x00) {
483 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances,
484 list) {
485 if (!(force || adv_instance->timeout))
486 continue;
487
488 rem_inst = adv_instance->instance;
489 err = hci_remove_adv_instance(hdev, instance: rem_inst);
490 if (!err)
491 mgmt_advertising_removed(sk, hdev, instance: rem_inst);
492 }
493 } else {
494 adv_instance = hci_find_adv_instance(hdev, instance);
495
496 if (force || (adv_instance && adv_instance->timeout &&
497 !adv_instance->remaining_time)) {
498 /* Don't advertise a removed instance. */
499 if (next_instance &&
500 next_instance->instance == instance)
501 next_instance = NULL;
502
503 err = hci_remove_adv_instance(hdev, instance);
504 if (!err)
505 mgmt_advertising_removed(sk, hdev, instance);
506 }
507 }
508
509 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
510 return 0;
511
512 if (next_instance && !ext_adv_capable(hdev))
513 return hci_schedule_adv_instance_sync(hdev,
514 instance: next_instance->instance,
515 force: false);
516
517 return 0;
518}
519
520static int adv_timeout_expire_sync(struct hci_dev *hdev, void *data)
521{
522 u8 instance = *(u8 *)data;
523
524 kfree(objp: data);
525
526 hci_clear_adv_instance_sync(hdev, NULL, instance, force: false);
527
528 if (list_empty(head: &hdev->adv_instances))
529 return hci_disable_advertising_sync(hdev);
530
531 return 0;
532}
533
534static void adv_timeout_expire(struct work_struct *work)
535{
536 u8 *inst_ptr;
537 struct hci_dev *hdev = container_of(work, struct hci_dev,
538 adv_instance_expire.work);
539
540 bt_dev_dbg(hdev, "");
541
542 hci_dev_lock(hdev);
543
544 hdev->adv_instance_timeout = 0;
545
546 if (hdev->cur_adv_instance == 0x00)
547 goto unlock;
548
549 inst_ptr = kmalloc(size: 1, GFP_KERNEL);
550 if (!inst_ptr)
551 goto unlock;
552
553 *inst_ptr = hdev->cur_adv_instance;
554 hci_cmd_sync_queue(hdev, func: adv_timeout_expire_sync, data: inst_ptr, NULL);
555
556unlock:
557 hci_dev_unlock(hdev);
558}
559
560void hci_cmd_sync_init(struct hci_dev *hdev)
561{
562 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
563 INIT_LIST_HEAD(list: &hdev->cmd_sync_work_list);
564 mutex_init(&hdev->cmd_sync_work_lock);
565 mutex_init(&hdev->unregister_lock);
566
567 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
568 INIT_WORK(&hdev->reenable_adv_work, reenable_adv);
569 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable);
570 INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
571}
572
573static void _hci_cmd_sync_cancel_entry(struct hci_dev *hdev,
574 struct hci_cmd_sync_work_entry *entry,
575 int err)
576{
577 if (entry->destroy)
578 entry->destroy(hdev, entry->data, err);
579
580 list_del(entry: &entry->list);
581 kfree(objp: entry);
582}
583
584void hci_cmd_sync_clear(struct hci_dev *hdev)
585{
586 struct hci_cmd_sync_work_entry *entry, *tmp;
587
588 cancel_work_sync(work: &hdev->cmd_sync_work);
589 cancel_work_sync(work: &hdev->reenable_adv_work);
590
591 mutex_lock(&hdev->cmd_sync_work_lock);
592 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list)
593 _hci_cmd_sync_cancel_entry(hdev, entry, err: -ECANCELED);
594 mutex_unlock(lock: &hdev->cmd_sync_work_lock);
595}
596
597void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
598{
599 bt_dev_dbg(hdev, "err 0x%2.2x", err);
600
601 if (hdev->req_status == HCI_REQ_PEND) {
602 hdev->req_result = err;
603 hdev->req_status = HCI_REQ_CANCELED;
604
605 queue_work(wq: hdev->workqueue, work: &hdev->cmd_sync_cancel_work);
606 }
607}
608EXPORT_SYMBOL(hci_cmd_sync_cancel);
609
610/* Cancel ongoing command request synchronously:
611 *
612 * - Set result and mark status to HCI_REQ_CANCELED
613 * - Wakeup command sync thread
614 */
615void hci_cmd_sync_cancel_sync(struct hci_dev *hdev, int err)
616{
617 bt_dev_dbg(hdev, "err 0x%2.2x", err);
618
619 if (hdev->req_status == HCI_REQ_PEND) {
620 /* req_result is __u32 so error must be positive to be properly
621 * propagated.
622 */
623 hdev->req_result = err < 0 ? -err : err;
624 hdev->req_status = HCI_REQ_CANCELED;
625
626 wake_up_interruptible(&hdev->req_wait_q);
627 }
628}
629EXPORT_SYMBOL(hci_cmd_sync_cancel_sync);
630
631/* Submit HCI command to be run in as cmd_sync_work:
632 *
633 * - hdev must _not_ be unregistered
634 */
635int hci_cmd_sync_submit(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
636 void *data, hci_cmd_sync_work_destroy_t destroy)
637{
638 struct hci_cmd_sync_work_entry *entry;
639 int err = 0;
640
641 mutex_lock(&hdev->unregister_lock);
642 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
643 err = -ENODEV;
644 goto unlock;
645 }
646
647 entry = kmalloc(size: sizeof(*entry), GFP_KERNEL);
648 if (!entry) {
649 err = -ENOMEM;
650 goto unlock;
651 }
652 entry->func = func;
653 entry->data = data;
654 entry->destroy = destroy;
655
656 mutex_lock(&hdev->cmd_sync_work_lock);
657 list_add_tail(new: &entry->list, head: &hdev->cmd_sync_work_list);
658 mutex_unlock(lock: &hdev->cmd_sync_work_lock);
659
660 queue_work(wq: hdev->req_workqueue, work: &hdev->cmd_sync_work);
661
662unlock:
663 mutex_unlock(lock: &hdev->unregister_lock);
664 return err;
665}
666EXPORT_SYMBOL(hci_cmd_sync_submit);
667
668/* Queue HCI command:
669 *
670 * - hdev must be running
671 */
672int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
673 void *data, hci_cmd_sync_work_destroy_t destroy)
674{
675 /* Only queue command if hdev is running which means it had been opened
676 * and is either on init phase or is already up.
677 */
678 if (!test_bit(HCI_RUNNING, &hdev->flags))
679 return -ENETDOWN;
680
681 return hci_cmd_sync_submit(hdev, func, data, destroy);
682}
683EXPORT_SYMBOL(hci_cmd_sync_queue);
684
685static struct hci_cmd_sync_work_entry *
686_hci_cmd_sync_lookup_entry(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
687 void *data, hci_cmd_sync_work_destroy_t destroy)
688{
689 struct hci_cmd_sync_work_entry *entry, *tmp;
690
691 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
692 if (func && entry->func != func)
693 continue;
694
695 if (data && entry->data != data)
696 continue;
697
698 if (destroy && entry->destroy != destroy)
699 continue;
700
701 return entry;
702 }
703
704 return NULL;
705}
706
707/* Queue HCI command entry once:
708 *
709 * - Lookup if an entry already exist and only if it doesn't creates a new entry
710 * and queue it.
711 */
712int hci_cmd_sync_queue_once(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
713 void *data, hci_cmd_sync_work_destroy_t destroy)
714{
715 if (hci_cmd_sync_lookup_entry(hdev, func, data, destroy))
716 return 0;
717
718 return hci_cmd_sync_queue(hdev, func, data, destroy);
719}
720EXPORT_SYMBOL(hci_cmd_sync_queue_once);
721
722/* Lookup HCI command entry:
723 *
724 * - Return first entry that matches by function callback or data or
725 * destroy callback.
726 */
727struct hci_cmd_sync_work_entry *
728hci_cmd_sync_lookup_entry(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
729 void *data, hci_cmd_sync_work_destroy_t destroy)
730{
731 struct hci_cmd_sync_work_entry *entry;
732
733 mutex_lock(&hdev->cmd_sync_work_lock);
734 entry = _hci_cmd_sync_lookup_entry(hdev, func, data, destroy);
735 mutex_unlock(lock: &hdev->cmd_sync_work_lock);
736
737 return entry;
738}
739EXPORT_SYMBOL(hci_cmd_sync_lookup_entry);
740
741/* Cancel HCI command entry */
742void hci_cmd_sync_cancel_entry(struct hci_dev *hdev,
743 struct hci_cmd_sync_work_entry *entry)
744{
745 mutex_lock(&hdev->cmd_sync_work_lock);
746 _hci_cmd_sync_cancel_entry(hdev, entry, err: -ECANCELED);
747 mutex_unlock(lock: &hdev->cmd_sync_work_lock);
748}
749EXPORT_SYMBOL(hci_cmd_sync_cancel_entry);
750
751/* Dequeue one HCI command entry:
752 *
753 * - Lookup and cancel first entry that matches.
754 */
755bool hci_cmd_sync_dequeue_once(struct hci_dev *hdev,
756 hci_cmd_sync_work_func_t func,
757 void *data, hci_cmd_sync_work_destroy_t destroy)
758{
759 struct hci_cmd_sync_work_entry *entry;
760
761 entry = hci_cmd_sync_lookup_entry(hdev, func, data, destroy);
762 if (!entry)
763 return false;
764
765 hci_cmd_sync_cancel_entry(hdev, entry);
766
767 return true;
768}
769EXPORT_SYMBOL(hci_cmd_sync_dequeue_once);
770
771/* Dequeue HCI command entry:
772 *
773 * - Lookup and cancel any entry that matches by function callback or data or
774 * destroy callback.
775 */
776bool hci_cmd_sync_dequeue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
777 void *data, hci_cmd_sync_work_destroy_t destroy)
778{
779 struct hci_cmd_sync_work_entry *entry;
780 bool ret = false;
781
782 mutex_lock(&hdev->cmd_sync_work_lock);
783 while ((entry = _hci_cmd_sync_lookup_entry(hdev, func, data,
784 destroy))) {
785 _hci_cmd_sync_cancel_entry(hdev, entry, err: -ECANCELED);
786 ret = true;
787 }
788 mutex_unlock(lock: &hdev->cmd_sync_work_lock);
789
790 return ret;
791}
792EXPORT_SYMBOL(hci_cmd_sync_dequeue);
793
794int hci_update_eir_sync(struct hci_dev *hdev)
795{
796 struct hci_cp_write_eir cp;
797
798 bt_dev_dbg(hdev, "");
799
800 if (!hdev_is_powered(hdev))
801 return 0;
802
803 if (!lmp_ext_inq_capable(hdev))
804 return 0;
805
806 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
807 return 0;
808
809 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
810 return 0;
811
812 memset(&cp, 0, sizeof(cp));
813
814 eir_create(hdev, data: cp.data);
815
816 if (memcmp(p: cp.data, q: hdev->eir, size: sizeof(cp.data)) == 0)
817 return 0;
818
819 memcpy(hdev->eir, cp.data, sizeof(cp.data));
820
821 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
822 HCI_CMD_TIMEOUT);
823}
824
825static u8 get_service_classes(struct hci_dev *hdev)
826{
827 struct bt_uuid *uuid;
828 u8 val = 0;
829
830 list_for_each_entry(uuid, &hdev->uuids, list)
831 val |= uuid->svc_hint;
832
833 return val;
834}
835
836int hci_update_class_sync(struct hci_dev *hdev)
837{
838 u8 cod[3];
839
840 bt_dev_dbg(hdev, "");
841
842 if (!hdev_is_powered(hdev))
843 return 0;
844
845 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
846 return 0;
847
848 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
849 return 0;
850
851 cod[0] = hdev->minor_class;
852 cod[1] = hdev->major_class;
853 cod[2] = get_service_classes(hdev);
854
855 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
856 cod[1] |= 0x20;
857
858 if (memcmp(p: cod, q: hdev->dev_class, size: 3) == 0)
859 return 0;
860
861 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
862 sizeof(cod), cod, HCI_CMD_TIMEOUT);
863}
864
865static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
866{
867 /* If there is no connection we are OK to advertise. */
868 if (hci_conn_num(hdev, LE_LINK) == 0)
869 return true;
870
871 /* Check le_states if there is any connection in peripheral role. */
872 if (hdev->conn_hash.le_num_peripheral > 0) {
873 /* Peripheral connection state and non connectable mode
874 * bit 20.
875 */
876 if (!connectable && !(hdev->le_states[2] & 0x10))
877 return false;
878
879 /* Peripheral connection state and connectable mode bit 38
880 * and scannable bit 21.
881 */
882 if (connectable && (!(hdev->le_states[4] & 0x40) ||
883 !(hdev->le_states[2] & 0x20)))
884 return false;
885 }
886
887 /* Check le_states if there is any connection in central role. */
888 if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
889 /* Central connection state and non connectable mode bit 18. */
890 if (!connectable && !(hdev->le_states[2] & 0x02))
891 return false;
892
893 /* Central connection state and connectable mode bit 35 and
894 * scannable 19.
895 */
896 if (connectable && (!(hdev->le_states[4] & 0x08) ||
897 !(hdev->le_states[2] & 0x08)))
898 return false;
899 }
900
901 return true;
902}
903
904static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
905{
906 /* If privacy is not enabled don't use RPA */
907 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
908 return false;
909
910 /* If basic privacy mode is enabled use RPA */
911 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
912 return true;
913
914 /* If limited privacy mode is enabled don't use RPA if we're
915 * both discoverable and bondable.
916 */
917 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
918 hci_dev_test_flag(hdev, HCI_BONDABLE))
919 return false;
920
921 /* We're neither bondable nor discoverable in the limited
922 * privacy mode, therefore use RPA.
923 */
924 return true;
925}
926
927static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
928{
929 /* If we're advertising or initiating an LE connection we can't
930 * go ahead and change the random address at this time. This is
931 * because the eventual initiator address used for the
932 * subsequently created connection will be undefined (some
933 * controllers use the new address and others the one we had
934 * when the operation started).
935 *
936 * In this kind of scenario skip the update and let the random
937 * address be updated at the next cycle.
938 */
939 if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
940 hci_lookup_le_connect(hdev)) {
941 bt_dev_dbg(hdev, "Deferring random address update");
942 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
943 return 0;
944 }
945
946 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
947 6, rpa, HCI_CMD_TIMEOUT);
948}
949
950int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
951 bool rpa, u8 *own_addr_type)
952{
953 int err;
954
955 /* If privacy is enabled use a resolvable private address. If
956 * current RPA has expired or there is something else than
957 * the current RPA in use, then generate a new one.
958 */
959 if (rpa) {
960 /* If Controller supports LL Privacy use own address type is
961 * 0x03
962 */
963 if (use_ll_privacy(hdev))
964 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
965 else
966 *own_addr_type = ADDR_LE_DEV_RANDOM;
967
968 /* Check if RPA is valid */
969 if (rpa_valid(hdev))
970 return 0;
971
972 err = smp_generate_rpa(hdev, irk: hdev->irk, rpa: &hdev->rpa);
973 if (err < 0) {
974 bt_dev_err(hdev, "failed to generate new RPA");
975 return err;
976 }
977
978 err = hci_set_random_addr_sync(hdev, rpa: &hdev->rpa);
979 if (err)
980 return err;
981
982 return 0;
983 }
984
985 /* In case of required privacy without resolvable private address,
986 * use an non-resolvable private address. This is useful for active
987 * scanning and non-connectable advertising.
988 */
989 if (require_privacy) {
990 bdaddr_t nrpa;
991
992 while (true) {
993 /* The non-resolvable private address is generated
994 * from random six bytes with the two most significant
995 * bits cleared.
996 */
997 get_random_bytes(buf: &nrpa, len: 6);
998 nrpa.b[5] &= 0x3f;
999
1000 /* The non-resolvable private address shall not be
1001 * equal to the public address.
1002 */
1003 if (bacmp(ba1: &hdev->bdaddr, ba2: &nrpa))
1004 break;
1005 }
1006
1007 *own_addr_type = ADDR_LE_DEV_RANDOM;
1008
1009 return hci_set_random_addr_sync(hdev, rpa: &nrpa);
1010 }
1011
1012 /* If forcing static address is in use or there is no public
1013 * address use the static address as random address (but skip
1014 * the HCI command if the current random address is already the
1015 * static one.
1016 *
1017 * In case BR/EDR has been disabled on a dual-mode controller
1018 * and a static address has been configured, then use that
1019 * address instead of the public BR/EDR address.
1020 */
1021 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
1022 !bacmp(ba1: &hdev->bdaddr, BDADDR_ANY) ||
1023 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
1024 bacmp(ba1: &hdev->static_addr, BDADDR_ANY))) {
1025 *own_addr_type = ADDR_LE_DEV_RANDOM;
1026 if (bacmp(ba1: &hdev->static_addr, ba2: &hdev->random_addr))
1027 return hci_set_random_addr_sync(hdev,
1028 rpa: &hdev->static_addr);
1029 return 0;
1030 }
1031
1032 /* Neither privacy nor static address is being used so use a
1033 * public address.
1034 */
1035 *own_addr_type = ADDR_LE_DEV_PUBLIC;
1036
1037 return 0;
1038}
1039
1040static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1041{
1042 struct hci_cp_le_set_ext_adv_enable *cp;
1043 struct hci_cp_ext_adv_set *set;
1044 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1045 u8 size;
1046
1047 /* If request specifies an instance that doesn't exist, fail */
1048 if (instance > 0) {
1049 struct adv_info *adv;
1050
1051 adv = hci_find_adv_instance(hdev, instance);
1052 if (!adv)
1053 return -EINVAL;
1054
1055 /* If not enabled there is nothing to do */
1056 if (!adv->enabled)
1057 return 0;
1058 }
1059
1060 memset(data, 0, sizeof(data));
1061
1062 cp = (void *)data;
1063 set = (void *)cp->data;
1064
1065 /* Instance 0x00 indicates all advertising instances will be disabled */
1066 cp->num_of_sets = !!instance;
1067 cp->enable = 0x00;
1068
1069 set->handle = instance;
1070
1071 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
1072
1073 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1074 size, data, HCI_CMD_TIMEOUT);
1075}
1076
1077static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
1078 bdaddr_t *random_addr)
1079{
1080 struct hci_cp_le_set_adv_set_rand_addr cp;
1081 int err;
1082
1083 if (!instance) {
1084 /* Instance 0x00 doesn't have an adv_info, instead it uses
1085 * hdev->random_addr to track its address so whenever it needs
1086 * to be updated this also set the random address since
1087 * hdev->random_addr is shared with scan state machine.
1088 */
1089 err = hci_set_random_addr_sync(hdev, rpa: random_addr);
1090 if (err)
1091 return err;
1092 }
1093
1094 memset(&cp, 0, sizeof(cp));
1095
1096 cp.handle = instance;
1097 bacpy(dst: &cp.bdaddr, src: random_addr);
1098
1099 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
1100 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1101}
1102
1103int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1104{
1105 struct hci_cp_le_set_ext_adv_params cp;
1106 bool connectable;
1107 u32 flags;
1108 bdaddr_t random_addr;
1109 u8 own_addr_type;
1110 int err;
1111 struct adv_info *adv;
1112 bool secondary_adv;
1113
1114 if (instance > 0) {
1115 adv = hci_find_adv_instance(hdev, instance);
1116 if (!adv)
1117 return -EINVAL;
1118 } else {
1119 adv = NULL;
1120 }
1121
1122 /* Updating parameters of an active instance will return a
1123 * Command Disallowed error, so we must first disable the
1124 * instance if it is active.
1125 */
1126 if (adv && !adv->pending) {
1127 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1128 if (err)
1129 return err;
1130 }
1131
1132 flags = hci_adv_instance_flags(hdev, instance);
1133
1134 /* If the "connectable" instance flag was not set, then choose between
1135 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1136 */
1137 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1138 mgmt_get_connectable(hdev);
1139
1140 if (!is_advertising_allowed(hdev, connectable))
1141 return -EPERM;
1142
1143 /* Set require_privacy to true only when non-connectable
1144 * advertising is used. In that case it is fine to use a
1145 * non-resolvable private address.
1146 */
1147 err = hci_get_random_address(hdev, require_privacy: !connectable,
1148 use_rpa: adv_use_rpa(hdev, flags), adv_instance: adv,
1149 own_addr_type: &own_addr_type, rand_addr: &random_addr);
1150 if (err < 0)
1151 return err;
1152
1153 memset(&cp, 0, sizeof(cp));
1154
1155 if (adv) {
1156 hci_cpu_to_le24(val: adv->min_interval, dst: cp.min_interval);
1157 hci_cpu_to_le24(val: adv->max_interval, dst: cp.max_interval);
1158 cp.tx_power = adv->tx_power;
1159 } else {
1160 hci_cpu_to_le24(val: hdev->le_adv_min_interval, dst: cp.min_interval);
1161 hci_cpu_to_le24(val: hdev->le_adv_max_interval, dst: cp.max_interval);
1162 cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
1163 }
1164
1165 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
1166
1167 if (connectable) {
1168 if (secondary_adv)
1169 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
1170 else
1171 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
1172 } else if (hci_adv_instance_is_scannable(hdev, instance) ||
1173 (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
1174 if (secondary_adv)
1175 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
1176 else
1177 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
1178 } else {
1179 if (secondary_adv)
1180 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
1181 else
1182 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
1183 }
1184
1185 /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
1186 * contains the peer’s Identity Address and the Peer_Address_Type
1187 * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
1188 * These parameters are used to locate the corresponding local IRK in
1189 * the resolving list; this IRK is used to generate their own address
1190 * used in the advertisement.
1191 */
1192 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
1193 hci_copy_identity_address(hdev, bdaddr: &cp.peer_addr,
1194 bdaddr_type: &cp.peer_addr_type);
1195
1196 cp.own_addr_type = own_addr_type;
1197 cp.channel_map = hdev->le_adv_channel_map;
1198 cp.handle = instance;
1199
1200 if (flags & MGMT_ADV_FLAG_SEC_2M) {
1201 cp.primary_phy = HCI_ADV_PHY_1M;
1202 cp.secondary_phy = HCI_ADV_PHY_2M;
1203 } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
1204 cp.primary_phy = HCI_ADV_PHY_CODED;
1205 cp.secondary_phy = HCI_ADV_PHY_CODED;
1206 } else {
1207 /* In all other cases use 1M */
1208 cp.primary_phy = HCI_ADV_PHY_1M;
1209 cp.secondary_phy = HCI_ADV_PHY_1M;
1210 }
1211
1212 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
1213 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1214 if (err)
1215 return err;
1216
1217 if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
1218 own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
1219 bacmp(ba1: &random_addr, BDADDR_ANY)) {
1220 /* Check if random address need to be updated */
1221 if (adv) {
1222 if (!bacmp(ba1: &random_addr, ba2: &adv->random_addr))
1223 return 0;
1224 } else {
1225 if (!bacmp(ba1: &random_addr, ba2: &hdev->random_addr))
1226 return 0;
1227 }
1228
1229 return hci_set_adv_set_random_addr_sync(hdev, instance,
1230 random_addr: &random_addr);
1231 }
1232
1233 return 0;
1234}
1235
1236static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1237{
1238 struct {
1239 struct hci_cp_le_set_ext_scan_rsp_data cp;
1240 u8 data[HCI_MAX_EXT_AD_LENGTH];
1241 } pdu;
1242 u8 len;
1243 struct adv_info *adv = NULL;
1244 int err;
1245
1246 memset(&pdu, 0, sizeof(pdu));
1247
1248 if (instance) {
1249 adv = hci_find_adv_instance(hdev, instance);
1250 if (!adv || !adv->scan_rsp_changed)
1251 return 0;
1252 }
1253
1254 len = eir_create_scan_rsp(hdev, instance, ptr: pdu.data);
1255
1256 pdu.cp.handle = instance;
1257 pdu.cp.length = len;
1258 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1259 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1260
1261 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
1262 sizeof(pdu.cp) + len, &pdu.cp,
1263 HCI_CMD_TIMEOUT);
1264 if (err)
1265 return err;
1266
1267 if (adv) {
1268 adv->scan_rsp_changed = false;
1269 } else {
1270 memcpy(hdev->scan_rsp_data, pdu.data, len);
1271 hdev->scan_rsp_data_len = len;
1272 }
1273
1274 return 0;
1275}
1276
1277static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1278{
1279 struct hci_cp_le_set_scan_rsp_data cp;
1280 u8 len;
1281
1282 memset(&cp, 0, sizeof(cp));
1283
1284 len = eir_create_scan_rsp(hdev, instance, ptr: cp.data);
1285
1286 if (hdev->scan_rsp_data_len == len &&
1287 !memcmp(p: cp.data, q: hdev->scan_rsp_data, size: len))
1288 return 0;
1289
1290 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
1291 hdev->scan_rsp_data_len = len;
1292
1293 cp.length = len;
1294
1295 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
1296 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1297}
1298
1299int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1300{
1301 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1302 return 0;
1303
1304 if (ext_adv_capable(hdev))
1305 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
1306
1307 return __hci_set_scan_rsp_data_sync(hdev, instance);
1308}
1309
1310int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
1311{
1312 struct hci_cp_le_set_ext_adv_enable *cp;
1313 struct hci_cp_ext_adv_set *set;
1314 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1315 struct adv_info *adv;
1316
1317 if (instance > 0) {
1318 adv = hci_find_adv_instance(hdev, instance);
1319 if (!adv)
1320 return -EINVAL;
1321 /* If already enabled there is nothing to do */
1322 if (adv->enabled)
1323 return 0;
1324 } else {
1325 adv = NULL;
1326 }
1327
1328 cp = (void *)data;
1329 set = (void *)cp->data;
1330
1331 memset(cp, 0, sizeof(*cp));
1332
1333 cp->enable = 0x01;
1334 cp->num_of_sets = 0x01;
1335
1336 memset(set, 0, sizeof(*set));
1337
1338 set->handle = instance;
1339
1340 /* Set duration per instance since controller is responsible for
1341 * scheduling it.
1342 */
1343 if (adv && adv->timeout) {
1344 u16 duration = adv->timeout * MSEC_PER_SEC;
1345
1346 /* Time = N * 10 ms */
1347 set->duration = cpu_to_le16(duration / 10);
1348 }
1349
1350 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1351 sizeof(*cp) +
1352 sizeof(*set) * cp->num_of_sets,
1353 data, HCI_CMD_TIMEOUT);
1354}
1355
1356int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
1357{
1358 int err;
1359
1360 err = hci_setup_ext_adv_instance_sync(hdev, instance);
1361 if (err)
1362 return err;
1363
1364 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
1365 if (err)
1366 return err;
1367
1368 return hci_enable_ext_advertising_sync(hdev, instance);
1369}
1370
1371int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1372{
1373 struct hci_cp_le_set_per_adv_enable cp;
1374 struct adv_info *adv = NULL;
1375
1376 /* If periodic advertising already disabled there is nothing to do. */
1377 adv = hci_find_adv_instance(hdev, instance);
1378 if (!adv || !adv->periodic || !adv->enabled)
1379 return 0;
1380
1381 memset(&cp, 0, sizeof(cp));
1382
1383 cp.enable = 0x00;
1384 cp.handle = instance;
1385
1386 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1387 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1388}
1389
1390static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance,
1391 u16 min_interval, u16 max_interval)
1392{
1393 struct hci_cp_le_set_per_adv_params cp;
1394
1395 memset(&cp, 0, sizeof(cp));
1396
1397 if (!min_interval)
1398 min_interval = DISCOV_LE_PER_ADV_INT_MIN;
1399
1400 if (!max_interval)
1401 max_interval = DISCOV_LE_PER_ADV_INT_MAX;
1402
1403 cp.handle = instance;
1404 cp.min_interval = cpu_to_le16(min_interval);
1405 cp.max_interval = cpu_to_le16(max_interval);
1406 cp.periodic_properties = 0x0000;
1407
1408 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS,
1409 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1410}
1411
1412static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance)
1413{
1414 struct {
1415 struct hci_cp_le_set_per_adv_data cp;
1416 u8 data[HCI_MAX_PER_AD_LENGTH];
1417 } pdu;
1418 u8 len;
1419
1420 memset(&pdu, 0, sizeof(pdu));
1421
1422 if (instance) {
1423 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1424
1425 if (!adv || !adv->periodic)
1426 return 0;
1427 }
1428
1429 len = eir_create_per_adv_data(hdev, instance, ptr: pdu.data);
1430
1431 pdu.cp.length = len;
1432 pdu.cp.handle = instance;
1433 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1434
1435 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA,
1436 sizeof(pdu.cp) + len, &pdu,
1437 HCI_CMD_TIMEOUT);
1438}
1439
1440static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1441{
1442 struct hci_cp_le_set_per_adv_enable cp;
1443 struct adv_info *adv = NULL;
1444
1445 /* If periodic advertising already enabled there is nothing to do. */
1446 adv = hci_find_adv_instance(hdev, instance);
1447 if (adv && adv->periodic && adv->enabled)
1448 return 0;
1449
1450 memset(&cp, 0, sizeof(cp));
1451
1452 cp.enable = 0x01;
1453 cp.handle = instance;
1454
1455 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1456 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1457}
1458
1459/* Checks if periodic advertising data contains a Basic Announcement and if it
1460 * does generates a Broadcast ID and add Broadcast Announcement.
1461 */
1462static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv)
1463{
1464 u8 bid[3];
1465 u8 ad[4 + 3];
1466
1467 /* Skip if NULL adv as instance 0x00 is used for general purpose
1468 * advertising so it cannot used for the likes of Broadcast Announcement
1469 * as it can be overwritten at any point.
1470 */
1471 if (!adv)
1472 return 0;
1473
1474 /* Check if PA data doesn't contains a Basic Audio Announcement then
1475 * there is nothing to do.
1476 */
1477 if (!eir_get_service_data(eir: adv->per_adv_data, eir_len: adv->per_adv_data_len,
1478 uuid: 0x1851, NULL))
1479 return 0;
1480
1481 /* Check if advertising data already has a Broadcast Announcement since
1482 * the process may want to control the Broadcast ID directly and in that
1483 * case the kernel shall no interfere.
1484 */
1485 if (eir_get_service_data(eir: adv->adv_data, eir_len: adv->adv_data_len, uuid: 0x1852,
1486 NULL))
1487 return 0;
1488
1489 /* Generate Broadcast ID */
1490 get_random_bytes(buf: bid, len: sizeof(bid));
1491 eir_append_service_data(eir: ad, eir_len: 0, uuid: 0x1852, data: bid, data_len: sizeof(bid));
1492 hci_set_adv_instance_data(hdev, instance: adv->instance, adv_data_len: sizeof(ad), adv_data: ad, scan_rsp_len: 0, NULL);
1493
1494 return hci_update_adv_data_sync(hdev, instance: adv->instance);
1495}
1496
1497int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len,
1498 u8 *data, u32 flags, u16 min_interval,
1499 u16 max_interval, u16 sync_interval)
1500{
1501 struct adv_info *adv = NULL;
1502 int err;
1503 bool added = false;
1504
1505 hci_disable_per_advertising_sync(hdev, instance);
1506
1507 if (instance) {
1508 adv = hci_find_adv_instance(hdev, instance);
1509 /* Create an instance if that could not be found */
1510 if (!adv) {
1511 adv = hci_add_per_instance(hdev, instance, flags,
1512 data_len, data,
1513 min_interval: sync_interval,
1514 max_interval: sync_interval);
1515 if (IS_ERR(ptr: adv))
1516 return PTR_ERR(ptr: adv);
1517 adv->pending = false;
1518 added = true;
1519 }
1520 }
1521
1522 /* Start advertising */
1523 err = hci_start_ext_adv_sync(hdev, instance);
1524 if (err < 0)
1525 goto fail;
1526
1527 err = hci_adv_bcast_annoucement(hdev, adv);
1528 if (err < 0)
1529 goto fail;
1530
1531 err = hci_set_per_adv_params_sync(hdev, instance, min_interval,
1532 max_interval);
1533 if (err < 0)
1534 goto fail;
1535
1536 err = hci_set_per_adv_data_sync(hdev, instance);
1537 if (err < 0)
1538 goto fail;
1539
1540 err = hci_enable_per_advertising_sync(hdev, instance);
1541 if (err < 0)
1542 goto fail;
1543
1544 return 0;
1545
1546fail:
1547 if (added)
1548 hci_remove_adv_instance(hdev, instance);
1549
1550 return err;
1551}
1552
1553static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
1554{
1555 int err;
1556
1557 if (ext_adv_capable(hdev))
1558 return hci_start_ext_adv_sync(hdev, instance);
1559
1560 err = hci_update_adv_data_sync(hdev, instance);
1561 if (err)
1562 return err;
1563
1564 err = hci_update_scan_rsp_data_sync(hdev, instance);
1565 if (err)
1566 return err;
1567
1568 return hci_enable_advertising_sync(hdev);
1569}
1570
1571int hci_enable_advertising_sync(struct hci_dev *hdev)
1572{
1573 struct adv_info *adv_instance;
1574 struct hci_cp_le_set_adv_param cp;
1575 u8 own_addr_type, enable = 0x01;
1576 bool connectable;
1577 u16 adv_min_interval, adv_max_interval;
1578 u32 flags;
1579 u8 status;
1580
1581 if (ext_adv_capable(hdev))
1582 return hci_enable_ext_advertising_sync(hdev,
1583 instance: hdev->cur_adv_instance);
1584
1585 flags = hci_adv_instance_flags(hdev, instance: hdev->cur_adv_instance);
1586 adv_instance = hci_find_adv_instance(hdev, instance: hdev->cur_adv_instance);
1587
1588 /* If the "connectable" instance flag was not set, then choose between
1589 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1590 */
1591 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1592 mgmt_get_connectable(hdev);
1593
1594 if (!is_advertising_allowed(hdev, connectable))
1595 return -EINVAL;
1596
1597 status = hci_disable_advertising_sync(hdev);
1598 if (status)
1599 return status;
1600
1601 /* Clear the HCI_LE_ADV bit temporarily so that the
1602 * hci_update_random_address knows that it's safe to go ahead
1603 * and write a new random address. The flag will be set back on
1604 * as soon as the SET_ADV_ENABLE HCI command completes.
1605 */
1606 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1607
1608 /* Set require_privacy to true only when non-connectable
1609 * advertising is used. In that case it is fine to use a
1610 * non-resolvable private address.
1611 */
1612 status = hci_update_random_address_sync(hdev, require_privacy: !connectable,
1613 rpa: adv_use_rpa(hdev, flags),
1614 own_addr_type: &own_addr_type);
1615 if (status)
1616 return status;
1617
1618 memset(&cp, 0, sizeof(cp));
1619
1620 if (adv_instance) {
1621 adv_min_interval = adv_instance->min_interval;
1622 adv_max_interval = adv_instance->max_interval;
1623 } else {
1624 adv_min_interval = hdev->le_adv_min_interval;
1625 adv_max_interval = hdev->le_adv_max_interval;
1626 }
1627
1628 if (connectable) {
1629 cp.type = LE_ADV_IND;
1630 } else {
1631 if (hci_adv_instance_is_scannable(hdev, instance: hdev->cur_adv_instance))
1632 cp.type = LE_ADV_SCAN_IND;
1633 else
1634 cp.type = LE_ADV_NONCONN_IND;
1635
1636 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1637 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
1638 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
1639 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
1640 }
1641 }
1642
1643 cp.min_interval = cpu_to_le16(adv_min_interval);
1644 cp.max_interval = cpu_to_le16(adv_max_interval);
1645 cp.own_address_type = own_addr_type;
1646 cp.channel_map = hdev->le_adv_channel_map;
1647
1648 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
1649 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1650 if (status)
1651 return status;
1652
1653 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1654 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1655}
1656
1657static int enable_advertising_sync(struct hci_dev *hdev, void *data)
1658{
1659 return hci_enable_advertising_sync(hdev);
1660}
1661
1662int hci_enable_advertising(struct hci_dev *hdev)
1663{
1664 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
1665 list_empty(head: &hdev->adv_instances))
1666 return 0;
1667
1668 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
1669}
1670
1671int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1672 struct sock *sk)
1673{
1674 int err;
1675
1676 if (!ext_adv_capable(hdev))
1677 return 0;
1678
1679 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1680 if (err)
1681 return err;
1682
1683 /* If request specifies an instance that doesn't exist, fail */
1684 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
1685 return -EINVAL;
1686
1687 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
1688 sizeof(instance), &instance, 0,
1689 HCI_CMD_TIMEOUT, sk);
1690}
1691
1692static int remove_ext_adv_sync(struct hci_dev *hdev, void *data)
1693{
1694 struct adv_info *adv = data;
1695 u8 instance = 0;
1696
1697 if (adv)
1698 instance = adv->instance;
1699
1700 return hci_remove_ext_adv_instance_sync(hdev, instance, NULL);
1701}
1702
1703int hci_remove_ext_adv_instance(struct hci_dev *hdev, u8 instance)
1704{
1705 struct adv_info *adv = NULL;
1706
1707 if (instance) {
1708 adv = hci_find_adv_instance(hdev, instance);
1709 if (!adv)
1710 return -EINVAL;
1711 }
1712
1713 return hci_cmd_sync_queue(hdev, remove_ext_adv_sync, adv, NULL);
1714}
1715
1716int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason)
1717{
1718 struct hci_cp_le_term_big cp;
1719
1720 memset(&cp, 0, sizeof(cp));
1721 cp.handle = handle;
1722 cp.reason = reason;
1723
1724 return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG,
1725 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1726}
1727
1728static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1729{
1730 struct {
1731 struct hci_cp_le_set_ext_adv_data cp;
1732 u8 data[HCI_MAX_EXT_AD_LENGTH];
1733 } pdu;
1734 u8 len;
1735 struct adv_info *adv = NULL;
1736 int err;
1737
1738 memset(&pdu, 0, sizeof(pdu));
1739
1740 if (instance) {
1741 adv = hci_find_adv_instance(hdev, instance);
1742 if (!adv || !adv->adv_data_changed)
1743 return 0;
1744 }
1745
1746 len = eir_create_adv_data(hdev, instance, ptr: pdu.data);
1747
1748 pdu.cp.length = len;
1749 pdu.cp.handle = instance;
1750 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1751 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1752
1753 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1754 sizeof(pdu.cp) + len, &pdu.cp,
1755 HCI_CMD_TIMEOUT);
1756 if (err)
1757 return err;
1758
1759 /* Update data if the command succeed */
1760 if (adv) {
1761 adv->adv_data_changed = false;
1762 } else {
1763 memcpy(hdev->adv_data, pdu.data, len);
1764 hdev->adv_data_len = len;
1765 }
1766
1767 return 0;
1768}
1769
1770static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1771{
1772 struct hci_cp_le_set_adv_data cp;
1773 u8 len;
1774
1775 memset(&cp, 0, sizeof(cp));
1776
1777 len = eir_create_adv_data(hdev, instance, ptr: cp.data);
1778
1779 /* There's nothing to do if the data hasn't changed */
1780 if (hdev->adv_data_len == len &&
1781 memcmp(p: cp.data, q: hdev->adv_data, size: len) == 0)
1782 return 0;
1783
1784 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1785 hdev->adv_data_len = len;
1786
1787 cp.length = len;
1788
1789 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1790 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1791}
1792
1793int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1794{
1795 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1796 return 0;
1797
1798 if (ext_adv_capable(hdev))
1799 return hci_set_ext_adv_data_sync(hdev, instance);
1800
1801 return hci_set_adv_data_sync(hdev, instance);
1802}
1803
1804int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1805 bool force)
1806{
1807 struct adv_info *adv = NULL;
1808 u16 timeout;
1809
1810 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
1811 return -EPERM;
1812
1813 if (hdev->adv_instance_timeout)
1814 return -EBUSY;
1815
1816 adv = hci_find_adv_instance(hdev, instance);
1817 if (!adv)
1818 return -ENOENT;
1819
1820 /* A zero timeout means unlimited advertising. As long as there is
1821 * only one instance, duration should be ignored. We still set a timeout
1822 * in case further instances are being added later on.
1823 *
1824 * If the remaining lifetime of the instance is more than the duration
1825 * then the timeout corresponds to the duration, otherwise it will be
1826 * reduced to the remaining instance lifetime.
1827 */
1828 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
1829 timeout = adv->duration;
1830 else
1831 timeout = adv->remaining_time;
1832
1833 /* The remaining time is being reduced unless the instance is being
1834 * advertised without time limit.
1835 */
1836 if (adv->timeout)
1837 adv->remaining_time = adv->remaining_time - timeout;
1838
1839 /* Only use work for scheduling instances with legacy advertising */
1840 if (!ext_adv_capable(hdev)) {
1841 hdev->adv_instance_timeout = timeout;
1842 queue_delayed_work(wq: hdev->req_workqueue,
1843 dwork: &hdev->adv_instance_expire,
1844 delay: msecs_to_jiffies(m: timeout * 1000));
1845 }
1846
1847 /* If we're just re-scheduling the same instance again then do not
1848 * execute any HCI commands. This happens when a single instance is
1849 * being advertised.
1850 */
1851 if (!force && hdev->cur_adv_instance == instance &&
1852 hci_dev_test_flag(hdev, HCI_LE_ADV))
1853 return 0;
1854
1855 hdev->cur_adv_instance = instance;
1856
1857 return hci_start_adv_sync(hdev, instance);
1858}
1859
1860static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
1861{
1862 int err;
1863
1864 if (!ext_adv_capable(hdev))
1865 return 0;
1866
1867 /* Disable instance 0x00 to disable all instances */
1868 err = hci_disable_ext_adv_instance_sync(hdev, instance: 0x00);
1869 if (err)
1870 return err;
1871
1872 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
1873 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1874}
1875
1876static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
1877{
1878 struct adv_info *adv, *n;
1879 int err = 0;
1880
1881 if (ext_adv_capable(hdev))
1882 /* Remove all existing sets */
1883 err = hci_clear_adv_sets_sync(hdev, sk);
1884 if (ext_adv_capable(hdev))
1885 return err;
1886
1887 /* This is safe as long as there is no command send while the lock is
1888 * held.
1889 */
1890 hci_dev_lock(hdev);
1891
1892 /* Cleanup non-ext instances */
1893 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1894 u8 instance = adv->instance;
1895 int err;
1896
1897 if (!(force || adv->timeout))
1898 continue;
1899
1900 err = hci_remove_adv_instance(hdev, instance);
1901 if (!err)
1902 mgmt_advertising_removed(sk, hdev, instance);
1903 }
1904
1905 hci_dev_unlock(hdev);
1906
1907 return 0;
1908}
1909
1910static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
1911 struct sock *sk)
1912{
1913 int err = 0;
1914
1915 /* If we use extended advertising, instance has to be removed first. */
1916 if (ext_adv_capable(hdev))
1917 err = hci_remove_ext_adv_instance_sync(hdev, instance, sk);
1918 if (ext_adv_capable(hdev))
1919 return err;
1920
1921 /* This is safe as long as there is no command send while the lock is
1922 * held.
1923 */
1924 hci_dev_lock(hdev);
1925
1926 err = hci_remove_adv_instance(hdev, instance);
1927 if (!err)
1928 mgmt_advertising_removed(sk, hdev, instance);
1929
1930 hci_dev_unlock(hdev);
1931
1932 return err;
1933}
1934
1935/* For a single instance:
1936 * - force == true: The instance will be removed even when its remaining
1937 * lifetime is not zero.
1938 * - force == false: the instance will be deactivated but kept stored unless
1939 * the remaining lifetime is zero.
1940 *
1941 * For instance == 0x00:
1942 * - force == true: All instances will be removed regardless of their timeout
1943 * setting.
1944 * - force == false: Only instances that have a timeout will be removed.
1945 */
1946int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
1947 u8 instance, bool force)
1948{
1949 struct adv_info *next = NULL;
1950 int err;
1951
1952 /* Cancel any timeout concerning the removed instance(s). */
1953 if (!instance || hdev->cur_adv_instance == instance)
1954 cancel_adv_timeout(hdev);
1955
1956 /* Get the next instance to advertise BEFORE we remove
1957 * the current one. This can be the same instance again
1958 * if there is only one instance.
1959 */
1960 if (hdev->cur_adv_instance == instance)
1961 next = hci_get_next_instance(hdev, instance);
1962
1963 if (!instance) {
1964 err = hci_clear_adv_sync(hdev, sk, force);
1965 if (err)
1966 return err;
1967 } else {
1968 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1969
1970 if (force || (adv && adv->timeout && !adv->remaining_time)) {
1971 /* Don't advertise a removed instance. */
1972 if (next && next->instance == instance)
1973 next = NULL;
1974
1975 err = hci_remove_adv_sync(hdev, instance, sk);
1976 if (err)
1977 return err;
1978 }
1979 }
1980
1981 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
1982 return 0;
1983
1984 if (next && !ext_adv_capable(hdev))
1985 hci_schedule_adv_instance_sync(hdev, instance: next->instance, force: false);
1986
1987 return 0;
1988}
1989
1990int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
1991{
1992 struct hci_cp_read_rssi cp;
1993
1994 cp.handle = handle;
1995 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
1996 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1997}
1998
1999int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
2000{
2001 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
2002 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
2003}
2004
2005int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
2006{
2007 struct hci_cp_read_tx_power cp;
2008
2009 cp.handle = handle;
2010 cp.type = type;
2011 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
2012 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2013}
2014
2015int hci_disable_advertising_sync(struct hci_dev *hdev)
2016{
2017 u8 enable = 0x00;
2018 int err = 0;
2019
2020 /* If controller is not advertising we are done. */
2021 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
2022 return 0;
2023
2024 if (ext_adv_capable(hdev))
2025 err = hci_disable_ext_adv_instance_sync(hdev, instance: 0x00);
2026 if (ext_adv_capable(hdev))
2027 return err;
2028
2029 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
2030 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
2031}
2032
2033static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
2034 u8 filter_dup)
2035{
2036 struct hci_cp_le_set_ext_scan_enable cp;
2037
2038 memset(&cp, 0, sizeof(cp));
2039 cp.enable = val;
2040
2041 if (hci_dev_test_flag(hdev, HCI_MESH))
2042 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2043 else
2044 cp.filter_dup = filter_dup;
2045
2046 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
2047 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2048}
2049
2050static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
2051 u8 filter_dup)
2052{
2053 struct hci_cp_le_set_scan_enable cp;
2054
2055 if (use_ext_scan(hdev))
2056 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
2057
2058 memset(&cp, 0, sizeof(cp));
2059 cp.enable = val;
2060
2061 if (val && hci_dev_test_flag(hdev, HCI_MESH))
2062 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2063 else
2064 cp.filter_dup = filter_dup;
2065
2066 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
2067 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2068}
2069
2070static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
2071{
2072 if (!use_ll_privacy(hdev))
2073 return 0;
2074
2075 /* If controller is not/already resolving we are done. */
2076 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2077 return 0;
2078
2079 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
2080 sizeof(val), &val, HCI_CMD_TIMEOUT);
2081}
2082
2083static int hci_scan_disable_sync(struct hci_dev *hdev)
2084{
2085 int err;
2086
2087 /* If controller is not scanning we are done. */
2088 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
2089 return 0;
2090
2091 if (hdev->scanning_paused) {
2092 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2093 return 0;
2094 }
2095
2096 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, filter_dup: 0x00);
2097 if (err) {
2098 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
2099 return err;
2100 }
2101
2102 return err;
2103}
2104
2105static bool scan_use_rpa(struct hci_dev *hdev)
2106{
2107 return hci_dev_test_flag(hdev, HCI_PRIVACY);
2108}
2109
2110static void hci_start_interleave_scan(struct hci_dev *hdev)
2111{
2112 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
2113 queue_delayed_work(wq: hdev->req_workqueue,
2114 dwork: &hdev->interleave_scan, delay: 0);
2115}
2116
2117static bool is_interleave_scanning(struct hci_dev *hdev)
2118{
2119 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
2120}
2121
2122static void cancel_interleave_scan(struct hci_dev *hdev)
2123{
2124 bt_dev_dbg(hdev, "cancelling interleave scan");
2125
2126 cancel_delayed_work_sync(dwork: &hdev->interleave_scan);
2127
2128 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
2129}
2130
2131/* Return true if interleave_scan wasn't started until exiting this function,
2132 * otherwise, return false
2133 */
2134static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
2135{
2136 /* Do interleaved scan only if all of the following are true:
2137 * - There is at least one ADV monitor
2138 * - At least one pending LE connection or one device to be scanned for
2139 * - Monitor offloading is not supported
2140 * If so, we should alternate between allowlist scan and one without
2141 * any filters to save power.
2142 */
2143 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
2144 !(list_empty(head: &hdev->pend_le_conns) &&
2145 list_empty(head: &hdev->pend_le_reports)) &&
2146 hci_get_adv_monitor_offload_ext(hdev) ==
2147 HCI_ADV_MONITOR_EXT_NONE;
2148 bool is_interleaving = is_interleave_scanning(hdev);
2149
2150 if (use_interleaving && !is_interleaving) {
2151 hci_start_interleave_scan(hdev);
2152 bt_dev_dbg(hdev, "starting interleave scan");
2153 return true;
2154 }
2155
2156 if (!use_interleaving && is_interleaving)
2157 cancel_interleave_scan(hdev);
2158
2159 return false;
2160}
2161
2162/* Removes connection to resolve list if needed.*/
2163static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
2164 bdaddr_t *bdaddr, u8 bdaddr_type)
2165{
2166 struct hci_cp_le_del_from_resolv_list cp;
2167 struct bdaddr_list_with_irk *entry;
2168
2169 if (!use_ll_privacy(hdev))
2170 return 0;
2171
2172 /* Check if the IRK has been programmed */
2173 entry = hci_bdaddr_list_lookup_with_irk(list: &hdev->le_resolv_list, bdaddr,
2174 type: bdaddr_type);
2175 if (!entry)
2176 return 0;
2177
2178 cp.bdaddr_type = bdaddr_type;
2179 bacpy(dst: &cp.bdaddr, src: bdaddr);
2180
2181 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
2182 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2183}
2184
2185static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
2186 bdaddr_t *bdaddr, u8 bdaddr_type)
2187{
2188 struct hci_cp_le_del_from_accept_list cp;
2189 int err;
2190
2191 /* Check if device is on accept list before removing it */
2192 if (!hci_bdaddr_list_lookup(list: &hdev->le_accept_list, bdaddr, type: bdaddr_type))
2193 return 0;
2194
2195 cp.bdaddr_type = bdaddr_type;
2196 bacpy(dst: &cp.bdaddr, src: bdaddr);
2197
2198 /* Ignore errors when removing from resolving list as that is likely
2199 * that the device was never added.
2200 */
2201 hci_le_del_resolve_list_sync(hdev, bdaddr: &cp.bdaddr, bdaddr_type: cp.bdaddr_type);
2202
2203 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
2204 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2205 if (err) {
2206 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
2207 return err;
2208 }
2209
2210 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
2211 cp.bdaddr_type);
2212
2213 return 0;
2214}
2215
2216struct conn_params {
2217 bdaddr_t addr;
2218 u8 addr_type;
2219 hci_conn_flags_t flags;
2220 u8 privacy_mode;
2221};
2222
2223/* Adds connection to resolve list if needed.
2224 * Setting params to NULL programs local hdev->irk
2225 */
2226static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
2227 struct conn_params *params)
2228{
2229 struct hci_cp_le_add_to_resolv_list cp;
2230 struct smp_irk *irk;
2231 struct bdaddr_list_with_irk *entry;
2232 struct hci_conn_params *p;
2233
2234 if (!use_ll_privacy(hdev))
2235 return 0;
2236
2237 /* Attempt to program local identity address, type and irk if params is
2238 * NULL.
2239 */
2240 if (!params) {
2241 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
2242 return 0;
2243
2244 hci_copy_identity_address(hdev, bdaddr: &cp.bdaddr, bdaddr_type: &cp.bdaddr_type);
2245 memcpy(cp.peer_irk, hdev->irk, 16);
2246 goto done;
2247 }
2248
2249 irk = hci_find_irk_by_addr(hdev, bdaddr: &params->addr, addr_type: params->addr_type);
2250 if (!irk)
2251 return 0;
2252
2253 /* Check if the IK has _not_ been programmed yet. */
2254 entry = hci_bdaddr_list_lookup_with_irk(list: &hdev->le_resolv_list,
2255 bdaddr: &params->addr,
2256 type: params->addr_type);
2257 if (entry)
2258 return 0;
2259
2260 cp.bdaddr_type = params->addr_type;
2261 bacpy(dst: &cp.bdaddr, src: &params->addr);
2262 memcpy(cp.peer_irk, irk->val, 16);
2263
2264 /* Default privacy mode is always Network */
2265 params->privacy_mode = HCI_NETWORK_PRIVACY;
2266
2267 rcu_read_lock();
2268 p = hci_pend_le_action_lookup(list: &hdev->pend_le_conns,
2269 addr: &params->addr, addr_type: params->addr_type);
2270 if (!p)
2271 p = hci_pend_le_action_lookup(list: &hdev->pend_le_reports,
2272 addr: &params->addr, addr_type: params->addr_type);
2273 if (p)
2274 WRITE_ONCE(p->privacy_mode, HCI_NETWORK_PRIVACY);
2275 rcu_read_unlock();
2276
2277done:
2278 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
2279 memcpy(cp.local_irk, hdev->irk, 16);
2280 else
2281 memset(cp.local_irk, 0, 16);
2282
2283 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
2284 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2285}
2286
2287/* Set Device Privacy Mode. */
2288static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
2289 struct conn_params *params)
2290{
2291 struct hci_cp_le_set_privacy_mode cp;
2292 struct smp_irk *irk;
2293
2294 /* If device privacy mode has already been set there is nothing to do */
2295 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
2296 return 0;
2297
2298 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
2299 * indicates that LL Privacy has been enabled and
2300 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
2301 */
2302 if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
2303 return 0;
2304
2305 irk = hci_find_irk_by_addr(hdev, bdaddr: &params->addr, addr_type: params->addr_type);
2306 if (!irk)
2307 return 0;
2308
2309 memset(&cp, 0, sizeof(cp));
2310 cp.bdaddr_type = irk->addr_type;
2311 bacpy(dst: &cp.bdaddr, src: &irk->bdaddr);
2312 cp.mode = HCI_DEVICE_PRIVACY;
2313
2314 /* Note: params->privacy_mode is not updated since it is a copy */
2315
2316 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
2317 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2318}
2319
2320/* Adds connection to allow list if needed, if the device uses RPA (has IRK)
2321 * this attempts to program the device in the resolving list as well and
2322 * properly set the privacy mode.
2323 */
2324static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
2325 struct conn_params *params,
2326 u8 *num_entries)
2327{
2328 struct hci_cp_le_add_to_accept_list cp;
2329 int err;
2330
2331 /* During suspend, only wakeable devices can be in acceptlist */
2332 if (hdev->suspended &&
2333 !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) {
2334 hci_le_del_accept_list_sync(hdev, bdaddr: &params->addr,
2335 bdaddr_type: params->addr_type);
2336 return 0;
2337 }
2338
2339 /* Select filter policy to accept all advertising */
2340 if (*num_entries >= hdev->le_accept_list_size)
2341 return -ENOSPC;
2342
2343 /* Accept list can not be used with RPAs */
2344 if (!use_ll_privacy(hdev) &&
2345 hci_find_irk_by_addr(hdev, bdaddr: &params->addr, addr_type: params->addr_type))
2346 return -EINVAL;
2347
2348 /* Attempt to program the device in the resolving list first to avoid
2349 * having to rollback in case it fails since the resolving list is
2350 * dynamic it can probably be smaller than the accept list.
2351 */
2352 err = hci_le_add_resolve_list_sync(hdev, params);
2353 if (err) {
2354 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
2355 return err;
2356 }
2357
2358 /* Set Privacy Mode */
2359 err = hci_le_set_privacy_mode_sync(hdev, params);
2360 if (err) {
2361 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
2362 return err;
2363 }
2364
2365 /* Check if already in accept list */
2366 if (hci_bdaddr_list_lookup(list: &hdev->le_accept_list, bdaddr: &params->addr,
2367 type: params->addr_type))
2368 return 0;
2369
2370 *num_entries += 1;
2371 cp.bdaddr_type = params->addr_type;
2372 bacpy(dst: &cp.bdaddr, src: &params->addr);
2373
2374 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
2375 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2376 if (err) {
2377 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
2378 /* Rollback the device from the resolving list */
2379 hci_le_del_resolve_list_sync(hdev, bdaddr: &cp.bdaddr, bdaddr_type: cp.bdaddr_type);
2380 return err;
2381 }
2382
2383 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
2384 cp.bdaddr_type);
2385
2386 return 0;
2387}
2388
2389/* This function disables/pause all advertising instances */
2390static int hci_pause_advertising_sync(struct hci_dev *hdev)
2391{
2392 int err;
2393 int old_state;
2394
2395 /* If already been paused there is nothing to do. */
2396 if (hdev->advertising_paused)
2397 return 0;
2398
2399 bt_dev_dbg(hdev, "Pausing directed advertising");
2400
2401 /* Stop directed advertising */
2402 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
2403 if (old_state) {
2404 /* When discoverable timeout triggers, then just make sure
2405 * the limited discoverable flag is cleared. Even in the case
2406 * of a timeout triggered from general discoverable, it is
2407 * safe to unconditionally clear the flag.
2408 */
2409 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
2410 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
2411 hdev->discov_timeout = 0;
2412 }
2413
2414 bt_dev_dbg(hdev, "Pausing advertising instances");
2415
2416 /* Call to disable any advertisements active on the controller.
2417 * This will succeed even if no advertisements are configured.
2418 */
2419 err = hci_disable_advertising_sync(hdev);
2420 if (err)
2421 return err;
2422
2423 /* If we are using software rotation, pause the loop */
2424 if (!ext_adv_capable(hdev))
2425 cancel_adv_timeout(hdev);
2426
2427 hdev->advertising_paused = true;
2428 hdev->advertising_old_state = old_state;
2429
2430 return 0;
2431}
2432
2433/* This function enables all user advertising instances */
2434static int hci_resume_advertising_sync(struct hci_dev *hdev)
2435{
2436 struct adv_info *adv, *tmp;
2437 int err;
2438
2439 /* If advertising has not been paused there is nothing to do. */
2440 if (!hdev->advertising_paused)
2441 return 0;
2442
2443 /* Resume directed advertising */
2444 hdev->advertising_paused = false;
2445 if (hdev->advertising_old_state) {
2446 hci_dev_set_flag(hdev, HCI_ADVERTISING);
2447 hdev->advertising_old_state = 0;
2448 }
2449
2450 bt_dev_dbg(hdev, "Resuming advertising instances");
2451
2452 if (ext_adv_capable(hdev)) {
2453 /* Call for each tracked instance to be re-enabled */
2454 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
2455 err = hci_enable_ext_advertising_sync(hdev,
2456 instance: adv->instance);
2457 if (!err)
2458 continue;
2459
2460 /* If the instance cannot be resumed remove it */
2461 hci_remove_ext_adv_instance_sync(hdev, instance: adv->instance,
2462 NULL);
2463 }
2464 } else {
2465 /* Schedule for most recent instance to be restarted and begin
2466 * the software rotation loop
2467 */
2468 err = hci_schedule_adv_instance_sync(hdev,
2469 instance: hdev->cur_adv_instance,
2470 force: true);
2471 }
2472
2473 hdev->advertising_paused = false;
2474
2475 return err;
2476}
2477
2478static int hci_pause_addr_resolution(struct hci_dev *hdev)
2479{
2480 int err;
2481
2482 if (!use_ll_privacy(hdev))
2483 return 0;
2484
2485 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2486 return 0;
2487
2488 /* Cannot disable addr resolution if scanning is enabled or
2489 * when initiating an LE connection.
2490 */
2491 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2492 hci_lookup_le_connect(hdev)) {
2493 bt_dev_err(hdev, "Command not allowed when scan/LE connect");
2494 return -EPERM;
2495 }
2496
2497 /* Cannot disable addr resolution if advertising is enabled. */
2498 err = hci_pause_advertising_sync(hdev);
2499 if (err) {
2500 bt_dev_err(hdev, "Pause advertising failed: %d", err);
2501 return err;
2502 }
2503
2504 err = hci_le_set_addr_resolution_enable_sync(hdev, val: 0x00);
2505 if (err)
2506 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
2507 err);
2508
2509 /* Return if address resolution is disabled and RPA is not used. */
2510 if (!err && scan_use_rpa(hdev))
2511 return 0;
2512
2513 hci_resume_advertising_sync(hdev);
2514 return err;
2515}
2516
2517struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
2518 bool extended, struct sock *sk)
2519{
2520 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
2521 HCI_OP_READ_LOCAL_OOB_DATA;
2522
2523 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
2524}
2525
2526static struct conn_params *conn_params_copy(struct list_head *list, size_t *n)
2527{
2528 struct hci_conn_params *params;
2529 struct conn_params *p;
2530 size_t i;
2531
2532 rcu_read_lock();
2533
2534 i = 0;
2535 list_for_each_entry_rcu(params, list, action)
2536 ++i;
2537 *n = i;
2538
2539 rcu_read_unlock();
2540
2541 p = kvcalloc(n: *n, size: sizeof(struct conn_params), GFP_KERNEL);
2542 if (!p)
2543 return NULL;
2544
2545 rcu_read_lock();
2546
2547 i = 0;
2548 list_for_each_entry_rcu(params, list, action) {
2549 /* Racing adds are handled in next scan update */
2550 if (i >= *n)
2551 break;
2552
2553 /* No hdev->lock, but: addr, addr_type are immutable.
2554 * privacy_mode is only written by us or in
2555 * hci_cc_le_set_privacy_mode that we wait for.
2556 * We should be idempotent so MGMT updating flags
2557 * while we are processing is OK.
2558 */
2559 bacpy(dst: &p[i].addr, src: &params->addr);
2560 p[i].addr_type = params->addr_type;
2561 p[i].flags = READ_ONCE(params->flags);
2562 p[i].privacy_mode = READ_ONCE(params->privacy_mode);
2563 ++i;
2564 }
2565
2566 rcu_read_unlock();
2567
2568 *n = i;
2569 return p;
2570}
2571
2572/* Clear LE Accept List */
2573static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
2574{
2575 if (!(hdev->commands[26] & 0x80))
2576 return 0;
2577
2578 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
2579 HCI_CMD_TIMEOUT);
2580}
2581
2582/* Device must not be scanning when updating the accept list.
2583 *
2584 * Update is done using the following sequence:
2585 *
2586 * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
2587 * Remove Devices From Accept List ->
2588 * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
2589 * Add Devices to Accept List ->
2590 * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
2591 * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
2592 * Enable Scanning
2593 *
2594 * In case of failure advertising shall be restored to its original state and
2595 * return would disable accept list since either accept or resolving list could
2596 * not be programmed.
2597 *
2598 */
2599static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
2600{
2601 struct conn_params *params;
2602 struct bdaddr_list *b, *t;
2603 u8 num_entries = 0;
2604 bool pend_conn, pend_report;
2605 u8 filter_policy;
2606 size_t i, n;
2607 int err;
2608
2609 /* Pause advertising if resolving list can be used as controllers
2610 * cannot accept resolving list modifications while advertising.
2611 */
2612 if (use_ll_privacy(hdev)) {
2613 err = hci_pause_advertising_sync(hdev);
2614 if (err) {
2615 bt_dev_err(hdev, "pause advertising failed: %d", err);
2616 return 0x00;
2617 }
2618 }
2619
2620 /* Disable address resolution while reprogramming accept list since
2621 * devices that do have an IRK will be programmed in the resolving list
2622 * when LL Privacy is enabled.
2623 */
2624 err = hci_le_set_addr_resolution_enable_sync(hdev, val: 0x00);
2625 if (err) {
2626 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
2627 goto done;
2628 }
2629
2630 /* Force address filtering if PA Sync is in progress */
2631 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2632 struct hci_cp_le_pa_create_sync *sent;
2633
2634 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_PA_CREATE_SYNC);
2635 if (sent) {
2636 struct conn_params pa;
2637
2638 memset(&pa, 0, sizeof(pa));
2639
2640 bacpy(dst: &pa.addr, src: &sent->addr);
2641 pa.addr_type = sent->addr_type;
2642
2643 /* Clear first since there could be addresses left
2644 * behind.
2645 */
2646 hci_le_clear_accept_list_sync(hdev);
2647
2648 num_entries = 1;
2649 err = hci_le_add_accept_list_sync(hdev, params: &pa,
2650 num_entries: &num_entries);
2651 goto done;
2652 }
2653 }
2654
2655 /* Go through the current accept list programmed into the
2656 * controller one by one and check if that address is connected or is
2657 * still in the list of pending connections or list of devices to
2658 * report. If not present in either list, then remove it from
2659 * the controller.
2660 */
2661 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
2662 if (hci_conn_hash_lookup_le(hdev, ba: &b->bdaddr, ba_type: b->bdaddr_type))
2663 continue;
2664
2665 /* Pointers not dereferenced, no locks needed */
2666 pend_conn = hci_pend_le_action_lookup(list: &hdev->pend_le_conns,
2667 addr: &b->bdaddr,
2668 addr_type: b->bdaddr_type);
2669 pend_report = hci_pend_le_action_lookup(list: &hdev->pend_le_reports,
2670 addr: &b->bdaddr,
2671 addr_type: b->bdaddr_type);
2672
2673 /* If the device is not likely to connect or report,
2674 * remove it from the acceptlist.
2675 */
2676 if (!pend_conn && !pend_report) {
2677 hci_le_del_accept_list_sync(hdev, bdaddr: &b->bdaddr,
2678 bdaddr_type: b->bdaddr_type);
2679 continue;
2680 }
2681
2682 num_entries++;
2683 }
2684
2685 /* Since all no longer valid accept list entries have been
2686 * removed, walk through the list of pending connections
2687 * and ensure that any new device gets programmed into
2688 * the controller.
2689 *
2690 * If the list of the devices is larger than the list of
2691 * available accept list entries in the controller, then
2692 * just abort and return filer policy value to not use the
2693 * accept list.
2694 *
2695 * The list and params may be mutated while we wait for events,
2696 * so make a copy and iterate it.
2697 */
2698
2699 params = conn_params_copy(list: &hdev->pend_le_conns, n: &n);
2700 if (!params) {
2701 err = -ENOMEM;
2702 goto done;
2703 }
2704
2705 for (i = 0; i < n; ++i) {
2706 err = hci_le_add_accept_list_sync(hdev, params: &params[i],
2707 num_entries: &num_entries);
2708 if (err) {
2709 kvfree(addr: params);
2710 goto done;
2711 }
2712 }
2713
2714 kvfree(addr: params);
2715
2716 /* After adding all new pending connections, walk through
2717 * the list of pending reports and also add these to the
2718 * accept list if there is still space. Abort if space runs out.
2719 */
2720
2721 params = conn_params_copy(list: &hdev->pend_le_reports, n: &n);
2722 if (!params) {
2723 err = -ENOMEM;
2724 goto done;
2725 }
2726
2727 for (i = 0; i < n; ++i) {
2728 err = hci_le_add_accept_list_sync(hdev, params: &params[i],
2729 num_entries: &num_entries);
2730 if (err) {
2731 kvfree(addr: params);
2732 goto done;
2733 }
2734 }
2735
2736 kvfree(addr: params);
2737
2738 /* Use the allowlist unless the following conditions are all true:
2739 * - We are not currently suspending
2740 * - There are 1 or more ADV monitors registered and it's not offloaded
2741 * - Interleaved scanning is not currently using the allowlist
2742 */
2743 if (!idr_is_empty(idr: &hdev->adv_monitors_idr) && !hdev->suspended &&
2744 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
2745 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
2746 err = -EINVAL;
2747
2748done:
2749 filter_policy = err ? 0x00 : 0x01;
2750
2751 /* Enable address resolution when LL Privacy is enabled. */
2752 err = hci_le_set_addr_resolution_enable_sync(hdev, val: 0x01);
2753 if (err)
2754 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
2755
2756 /* Resume advertising if it was paused */
2757 if (use_ll_privacy(hdev))
2758 hci_resume_advertising_sync(hdev);
2759
2760 /* Select filter policy to use accept list */
2761 return filter_policy;
2762}
2763
2764static void hci_le_scan_phy_params(struct hci_cp_le_scan_phy_params *cp,
2765 u8 type, u16 interval, u16 window)
2766{
2767 cp->type = type;
2768 cp->interval = cpu_to_le16(interval);
2769 cp->window = cpu_to_le16(window);
2770}
2771
2772static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
2773 u16 interval, u16 window,
2774 u8 own_addr_type, u8 filter_policy)
2775{
2776 struct hci_cp_le_set_ext_scan_params *cp;
2777 struct hci_cp_le_scan_phy_params *phy;
2778 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
2779 u8 num_phy = 0x00;
2780
2781 cp = (void *)data;
2782 phy = (void *)cp->data;
2783
2784 memset(data, 0, sizeof(data));
2785
2786 cp->own_addr_type = own_addr_type;
2787 cp->filter_policy = filter_policy;
2788
2789 /* Check if PA Sync is in progress then select the PHY based on the
2790 * hci_conn.iso_qos.
2791 */
2792 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
2793 struct hci_cp_le_add_to_accept_list *sent;
2794
2795 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
2796 if (sent) {
2797 struct hci_conn *conn;
2798
2799 conn = hci_conn_hash_lookup_ba(hdev, ISO_LINK,
2800 ba: &sent->bdaddr);
2801 if (conn) {
2802 struct bt_iso_qos *qos = &conn->iso_qos;
2803
2804 if (qos->bcast.in.phy & BT_ISO_PHY_1M ||
2805 qos->bcast.in.phy & BT_ISO_PHY_2M) {
2806 cp->scanning_phys |= LE_SCAN_PHY_1M;
2807 hci_le_scan_phy_params(cp: phy, type,
2808 interval,
2809 window);
2810 num_phy++;
2811 phy++;
2812 }
2813
2814 if (qos->bcast.in.phy & BT_ISO_PHY_CODED) {
2815 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2816 hci_le_scan_phy_params(cp: phy, type,
2817 interval: interval * 3,
2818 window: window * 3);
2819 num_phy++;
2820 phy++;
2821 }
2822
2823 if (num_phy)
2824 goto done;
2825 }
2826 }
2827 }
2828
2829 if (scan_1m(hdev) || scan_2m(hdev)) {
2830 cp->scanning_phys |= LE_SCAN_PHY_1M;
2831 hci_le_scan_phy_params(cp: phy, type, interval, window);
2832 num_phy++;
2833 phy++;
2834 }
2835
2836 if (scan_coded(hdev)) {
2837 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2838 hci_le_scan_phy_params(cp: phy, type, interval: interval * 3, window: window * 3);
2839 num_phy++;
2840 phy++;
2841 }
2842
2843done:
2844 if (!num_phy)
2845 return -EINVAL;
2846
2847 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
2848 sizeof(*cp) + sizeof(*phy) * num_phy,
2849 data, HCI_CMD_TIMEOUT);
2850}
2851
2852static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
2853 u16 interval, u16 window,
2854 u8 own_addr_type, u8 filter_policy)
2855{
2856 struct hci_cp_le_set_scan_param cp;
2857
2858 if (use_ext_scan(hdev))
2859 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
2860 window, own_addr_type,
2861 filter_policy);
2862
2863 memset(&cp, 0, sizeof(cp));
2864 cp.type = type;
2865 cp.interval = cpu_to_le16(interval);
2866 cp.window = cpu_to_le16(window);
2867 cp.own_address_type = own_addr_type;
2868 cp.filter_policy = filter_policy;
2869
2870 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
2871 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2872}
2873
2874static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
2875 u16 window, u8 own_addr_type, u8 filter_policy,
2876 u8 filter_dup)
2877{
2878 int err;
2879
2880 if (hdev->scanning_paused) {
2881 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2882 return 0;
2883 }
2884
2885 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
2886 own_addr_type, filter_policy);
2887 if (err)
2888 return err;
2889
2890 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
2891}
2892
2893static int hci_passive_scan_sync(struct hci_dev *hdev)
2894{
2895 u8 own_addr_type;
2896 u8 filter_policy;
2897 u16 window, interval;
2898 u8 filter_dups = LE_SCAN_FILTER_DUP_ENABLE;
2899 int err;
2900
2901 if (hdev->scanning_paused) {
2902 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2903 return 0;
2904 }
2905
2906 err = hci_scan_disable_sync(hdev);
2907 if (err) {
2908 bt_dev_err(hdev, "disable scanning failed: %d", err);
2909 return err;
2910 }
2911
2912 /* Set require_privacy to false since no SCAN_REQ are send
2913 * during passive scanning. Not using an non-resolvable address
2914 * here is important so that peer devices using direct
2915 * advertising with our address will be correctly reported
2916 * by the controller.
2917 */
2918 if (hci_update_random_address_sync(hdev, require_privacy: false, rpa: scan_use_rpa(hdev),
2919 own_addr_type: &own_addr_type))
2920 return 0;
2921
2922 if (hdev->enable_advmon_interleave_scan &&
2923 hci_update_interleaved_scan_sync(hdev))
2924 return 0;
2925
2926 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
2927
2928 /* Adding or removing entries from the accept list must
2929 * happen before enabling scanning. The controller does
2930 * not allow accept list modification while scanning.
2931 */
2932 filter_policy = hci_update_accept_list_sync(hdev);
2933
2934 /* When the controller is using random resolvable addresses and
2935 * with that having LE privacy enabled, then controllers with
2936 * Extended Scanner Filter Policies support can now enable support
2937 * for handling directed advertising.
2938 *
2939 * So instead of using filter polices 0x00 (no acceptlist)
2940 * and 0x01 (acceptlist enabled) use the new filter policies
2941 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
2942 */
2943 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
2944 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
2945 filter_policy |= 0x02;
2946
2947 if (hdev->suspended) {
2948 window = hdev->le_scan_window_suspend;
2949 interval = hdev->le_scan_int_suspend;
2950 } else if (hci_is_le_conn_scanning(hdev)) {
2951 window = hdev->le_scan_window_connect;
2952 interval = hdev->le_scan_int_connect;
2953 } else if (hci_is_adv_monitoring(hdev)) {
2954 window = hdev->le_scan_window_adv_monitor;
2955 interval = hdev->le_scan_int_adv_monitor;
2956 } else {
2957 window = hdev->le_scan_window;
2958 interval = hdev->le_scan_interval;
2959 }
2960
2961 /* Disable all filtering for Mesh */
2962 if (hci_dev_test_flag(hdev, HCI_MESH)) {
2963 filter_policy = 0;
2964 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
2965 }
2966
2967 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
2968
2969 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
2970 own_addr_type, filter_policy, filter_dup: filter_dups);
2971}
2972
2973/* This function controls the passive scanning based on hdev->pend_le_conns
2974 * list. If there are pending LE connection we start the background scanning,
2975 * otherwise we stop it in the following sequence:
2976 *
2977 * If there are devices to scan:
2978 *
2979 * Disable Scanning -> Update Accept List ->
2980 * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
2981 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
2982 * Enable Scanning
2983 *
2984 * Otherwise:
2985 *
2986 * Disable Scanning
2987 */
2988int hci_update_passive_scan_sync(struct hci_dev *hdev)
2989{
2990 int err;
2991
2992 if (!test_bit(HCI_UP, &hdev->flags) ||
2993 test_bit(HCI_INIT, &hdev->flags) ||
2994 hci_dev_test_flag(hdev, HCI_SETUP) ||
2995 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2996 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2997 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2998 return 0;
2999
3000 /* No point in doing scanning if LE support hasn't been enabled */
3001 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
3002 return 0;
3003
3004 /* If discovery is active don't interfere with it */
3005 if (hdev->discovery.state != DISCOVERY_STOPPED)
3006 return 0;
3007
3008 /* Reset RSSI and UUID filters when starting background scanning
3009 * since these filters are meant for service discovery only.
3010 *
3011 * The Start Discovery and Start Service Discovery operations
3012 * ensure to set proper values for RSSI threshold and UUID
3013 * filter list. So it is safe to just reset them here.
3014 */
3015 hci_discovery_filter_clear(hdev);
3016
3017 bt_dev_dbg(hdev, "ADV monitoring is %s",
3018 hci_is_adv_monitoring(hdev) ? "on" : "off");
3019
3020 if (!hci_dev_test_flag(hdev, HCI_MESH) &&
3021 list_empty(head: &hdev->pend_le_conns) &&
3022 list_empty(head: &hdev->pend_le_reports) &&
3023 !hci_is_adv_monitoring(hdev) &&
3024 !hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
3025 /* If there is no pending LE connections or devices
3026 * to be scanned for or no ADV monitors, we should stop the
3027 * background scanning.
3028 */
3029
3030 bt_dev_dbg(hdev, "stopping background scanning");
3031
3032 err = hci_scan_disable_sync(hdev);
3033 if (err)
3034 bt_dev_err(hdev, "stop background scanning failed: %d",
3035 err);
3036 } else {
3037 /* If there is at least one pending LE connection, we should
3038 * keep the background scan running.
3039 */
3040
3041 /* If controller is connecting, we should not start scanning
3042 * since some controllers are not able to scan and connect at
3043 * the same time.
3044 */
3045 if (hci_lookup_le_connect(hdev))
3046 return 0;
3047
3048 bt_dev_dbg(hdev, "start background scanning");
3049
3050 err = hci_passive_scan_sync(hdev);
3051 if (err)
3052 bt_dev_err(hdev, "start background scanning failed: %d",
3053 err);
3054 }
3055
3056 return err;
3057}
3058
3059static int update_scan_sync(struct hci_dev *hdev, void *data)
3060{
3061 return hci_update_scan_sync(hdev);
3062}
3063
3064int hci_update_scan(struct hci_dev *hdev)
3065{
3066 return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL);
3067}
3068
3069static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
3070{
3071 return hci_update_passive_scan_sync(hdev);
3072}
3073
3074int hci_update_passive_scan(struct hci_dev *hdev)
3075{
3076 /* Only queue if it would have any effect */
3077 if (!test_bit(HCI_UP, &hdev->flags) ||
3078 test_bit(HCI_INIT, &hdev->flags) ||
3079 hci_dev_test_flag(hdev, HCI_SETUP) ||
3080 hci_dev_test_flag(hdev, HCI_CONFIG) ||
3081 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
3082 hci_dev_test_flag(hdev, HCI_UNREGISTER))
3083 return 0;
3084
3085 return hci_cmd_sync_queue_once(hdev, update_passive_scan_sync, NULL,
3086 NULL);
3087}
3088
3089int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
3090{
3091 int err;
3092
3093 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
3094 return 0;
3095
3096 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
3097 sizeof(val), &val, HCI_CMD_TIMEOUT);
3098
3099 if (!err) {
3100 if (val) {
3101 hdev->features[1][0] |= LMP_HOST_SC;
3102 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
3103 } else {
3104 hdev->features[1][0] &= ~LMP_HOST_SC;
3105 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
3106 }
3107 }
3108
3109 return err;
3110}
3111
3112int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
3113{
3114 int err;
3115
3116 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
3117 lmp_host_ssp_capable(hdev))
3118 return 0;
3119
3120 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
3121 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
3122 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3123 }
3124
3125 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3126 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3127 if (err)
3128 return err;
3129
3130 return hci_write_sc_support_sync(hdev, val: 0x01);
3131}
3132
3133int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
3134{
3135 struct hci_cp_write_le_host_supported cp;
3136
3137 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
3138 !lmp_bredr_capable(hdev))
3139 return 0;
3140
3141 /* Check first if we already have the right host state
3142 * (host features set)
3143 */
3144 if (le == lmp_host_le_capable(hdev) &&
3145 simul == lmp_host_le_br_capable(hdev))
3146 return 0;
3147
3148 memset(&cp, 0, sizeof(cp));
3149
3150 cp.le = le;
3151 cp.simul = simul;
3152
3153 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
3154 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3155}
3156
3157static int hci_powered_update_adv_sync(struct hci_dev *hdev)
3158{
3159 struct adv_info *adv, *tmp;
3160 int err;
3161
3162 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
3163 return 0;
3164
3165 /* If RPA Resolution has not been enable yet it means the
3166 * resolving list is empty and we should attempt to program the
3167 * local IRK in order to support using own_addr_type
3168 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
3169 */
3170 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
3171 hci_le_add_resolve_list_sync(hdev, NULL);
3172 hci_le_set_addr_resolution_enable_sync(hdev, val: 0x01);
3173 }
3174
3175 /* Make sure the controller has a good default for
3176 * advertising data. This also applies to the case
3177 * where BR/EDR was toggled during the AUTO_OFF phase.
3178 */
3179 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
3180 list_empty(head: &hdev->adv_instances)) {
3181 if (ext_adv_capable(hdev)) {
3182 err = hci_setup_ext_adv_instance_sync(hdev, instance: 0x00);
3183 if (!err)
3184 hci_update_scan_rsp_data_sync(hdev, instance: 0x00);
3185 } else {
3186 err = hci_update_adv_data_sync(hdev, instance: 0x00);
3187 if (!err)
3188 hci_update_scan_rsp_data_sync(hdev, instance: 0x00);
3189 }
3190
3191 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
3192 hci_enable_advertising_sync(hdev);
3193 }
3194
3195 /* Call for each tracked instance to be scheduled */
3196 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
3197 hci_schedule_adv_instance_sync(hdev, instance: adv->instance, force: true);
3198
3199 return 0;
3200}
3201
3202static int hci_write_auth_enable_sync(struct hci_dev *hdev)
3203{
3204 u8 link_sec;
3205
3206 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
3207 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
3208 return 0;
3209
3210 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
3211 sizeof(link_sec), &link_sec,
3212 HCI_CMD_TIMEOUT);
3213}
3214
3215int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
3216{
3217 struct hci_cp_write_page_scan_activity cp;
3218 u8 type;
3219 int err = 0;
3220
3221 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3222 return 0;
3223
3224 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3225 return 0;
3226
3227 memset(&cp, 0, sizeof(cp));
3228
3229 if (enable) {
3230 type = PAGE_SCAN_TYPE_INTERLACED;
3231
3232 /* 160 msec page scan interval */
3233 cp.interval = cpu_to_le16(0x0100);
3234 } else {
3235 type = hdev->def_page_scan_type;
3236 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
3237 }
3238
3239 cp.window = cpu_to_le16(hdev->def_page_scan_window);
3240
3241 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
3242 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
3243 err = __hci_cmd_sync_status(hdev,
3244 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
3245 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3246 if (err)
3247 return err;
3248 }
3249
3250 if (hdev->page_scan_type != type)
3251 err = __hci_cmd_sync_status(hdev,
3252 HCI_OP_WRITE_PAGE_SCAN_TYPE,
3253 sizeof(type), &type,
3254 HCI_CMD_TIMEOUT);
3255
3256 return err;
3257}
3258
3259static bool disconnected_accept_list_entries(struct hci_dev *hdev)
3260{
3261 struct bdaddr_list *b;
3262
3263 list_for_each_entry(b, &hdev->accept_list, list) {
3264 struct hci_conn *conn;
3265
3266 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, ba: &b->bdaddr);
3267 if (!conn)
3268 return true;
3269
3270 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3271 return true;
3272 }
3273
3274 return false;
3275}
3276
3277static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
3278{
3279 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
3280 sizeof(val), &val,
3281 HCI_CMD_TIMEOUT);
3282}
3283
3284int hci_update_scan_sync(struct hci_dev *hdev)
3285{
3286 u8 scan;
3287
3288 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3289 return 0;
3290
3291 if (!hdev_is_powered(hdev))
3292 return 0;
3293
3294 if (mgmt_powering_down(hdev))
3295 return 0;
3296
3297 if (hdev->scanning_paused)
3298 return 0;
3299
3300 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
3301 disconnected_accept_list_entries(hdev))
3302 scan = SCAN_PAGE;
3303 else
3304 scan = SCAN_DISABLED;
3305
3306 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
3307 scan |= SCAN_INQUIRY;
3308
3309 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
3310 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
3311 return 0;
3312
3313 return hci_write_scan_enable_sync(hdev, val: scan);
3314}
3315
3316int hci_update_name_sync(struct hci_dev *hdev)
3317{
3318 struct hci_cp_write_local_name cp;
3319
3320 memset(&cp, 0, sizeof(cp));
3321
3322 memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
3323
3324 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
3325 sizeof(cp), &cp,
3326 HCI_CMD_TIMEOUT);
3327}
3328
3329/* This function perform powered update HCI command sequence after the HCI init
3330 * sequence which end up resetting all states, the sequence is as follows:
3331 *
3332 * HCI_SSP_ENABLED(Enable SSP)
3333 * HCI_LE_ENABLED(Enable LE)
3334 * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
3335 * Update adv data)
3336 * Enable Authentication
3337 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
3338 * Set Name -> Set EIR)
3339 * HCI_FORCE_STATIC_ADDR | BDADDR_ANY && !HCI_BREDR_ENABLED (Set Static Address)
3340 */
3341int hci_powered_update_sync(struct hci_dev *hdev)
3342{
3343 int err;
3344
3345 /* Register the available SMP channels (BR/EDR and LE) only when
3346 * successfully powering on the controller. This late
3347 * registration is required so that LE SMP can clearly decide if
3348 * the public address or static address is used.
3349 */
3350 smp_register(hdev);
3351
3352 err = hci_write_ssp_mode_sync(hdev, mode: 0x01);
3353 if (err)
3354 return err;
3355
3356 err = hci_write_le_host_supported_sync(hdev, le: 0x01, simul: 0x00);
3357 if (err)
3358 return err;
3359
3360 err = hci_powered_update_adv_sync(hdev);
3361 if (err)
3362 return err;
3363
3364 err = hci_write_auth_enable_sync(hdev);
3365 if (err)
3366 return err;
3367
3368 if (lmp_bredr_capable(hdev)) {
3369 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
3370 hci_write_fast_connectable_sync(hdev, enable: true);
3371 else
3372 hci_write_fast_connectable_sync(hdev, enable: false);
3373 hci_update_scan_sync(hdev);
3374 hci_update_class_sync(hdev);
3375 hci_update_name_sync(hdev);
3376 hci_update_eir_sync(hdev);
3377 }
3378
3379 /* If forcing static address is in use or there is no public
3380 * address use the static address as random address (but skip
3381 * the HCI command if the current random address is already the
3382 * static one.
3383 *
3384 * In case BR/EDR has been disabled on a dual-mode controller
3385 * and a static address has been configured, then use that
3386 * address instead of the public BR/EDR address.
3387 */
3388 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3389 (!bacmp(ba1: &hdev->bdaddr, BDADDR_ANY) &&
3390 !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))) {
3391 if (bacmp(ba1: &hdev->static_addr, BDADDR_ANY))
3392 return hci_set_random_addr_sync(hdev,
3393 rpa: &hdev->static_addr);
3394 }
3395
3396 return 0;
3397}
3398
3399/**
3400 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
3401 * (BD_ADDR) for a HCI device from
3402 * a firmware node property.
3403 * @hdev: The HCI device
3404 *
3405 * Search the firmware node for 'local-bd-address'.
3406 *
3407 * All-zero BD addresses are rejected, because those could be properties
3408 * that exist in the firmware tables, but were not updated by the firmware. For
3409 * example, the DTS could define 'local-bd-address', with zero BD addresses.
3410 */
3411static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
3412{
3413 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
3414 bdaddr_t ba;
3415 int ret;
3416
3417 ret = fwnode_property_read_u8_array(fwnode, propname: "local-bd-address",
3418 val: (u8 *)&ba, nval: sizeof(ba));
3419 if (ret < 0 || !bacmp(ba1: &ba, BDADDR_ANY))
3420 return;
3421
3422 if (test_bit(HCI_QUIRK_BDADDR_PROPERTY_BROKEN, &hdev->quirks))
3423 baswap(dst: &hdev->public_addr, src: &ba);
3424 else
3425 bacpy(dst: &hdev->public_addr, src: &ba);
3426}
3427
3428struct hci_init_stage {
3429 int (*func)(struct hci_dev *hdev);
3430};
3431
3432/* Run init stage NULL terminated function table */
3433static int hci_init_stage_sync(struct hci_dev *hdev,
3434 const struct hci_init_stage *stage)
3435{
3436 size_t i;
3437
3438 for (i = 0; stage[i].func; i++) {
3439 int err;
3440
3441 err = stage[i].func(hdev);
3442 if (err)
3443 return err;
3444 }
3445
3446 return 0;
3447}
3448
3449/* Read Local Version */
3450static int hci_read_local_version_sync(struct hci_dev *hdev)
3451{
3452 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
3453 0, NULL, HCI_CMD_TIMEOUT);
3454}
3455
3456/* Read BD Address */
3457static int hci_read_bd_addr_sync(struct hci_dev *hdev)
3458{
3459 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
3460 0, NULL, HCI_CMD_TIMEOUT);
3461}
3462
3463#define HCI_INIT(_func) \
3464{ \
3465 .func = _func, \
3466}
3467
3468static const struct hci_init_stage hci_init0[] = {
3469 /* HCI_OP_READ_LOCAL_VERSION */
3470 HCI_INIT(hci_read_local_version_sync),
3471 /* HCI_OP_READ_BD_ADDR */
3472 HCI_INIT(hci_read_bd_addr_sync),
3473 {}
3474};
3475
3476int hci_reset_sync(struct hci_dev *hdev)
3477{
3478 int err;
3479
3480 set_bit(nr: HCI_RESET, addr: &hdev->flags);
3481
3482 err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
3483 HCI_CMD_TIMEOUT);
3484 if (err)
3485 return err;
3486
3487 return 0;
3488}
3489
3490static int hci_init0_sync(struct hci_dev *hdev)
3491{
3492 int err;
3493
3494 bt_dev_dbg(hdev, "");
3495
3496 /* Reset */
3497 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3498 err = hci_reset_sync(hdev);
3499 if (err)
3500 return err;
3501 }
3502
3503 return hci_init_stage_sync(hdev, stage: hci_init0);
3504}
3505
3506static int hci_unconf_init_sync(struct hci_dev *hdev)
3507{
3508 int err;
3509
3510 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3511 return 0;
3512
3513 err = hci_init0_sync(hdev);
3514 if (err < 0)
3515 return err;
3516
3517 if (hci_dev_test_flag(hdev, HCI_SETUP))
3518 hci_debugfs_create_basic(hdev);
3519
3520 return 0;
3521}
3522
3523/* Read Local Supported Features. */
3524static int hci_read_local_features_sync(struct hci_dev *hdev)
3525{
3526 /* Not all AMP controllers support this command */
3527 if (hdev->dev_type == HCI_AMP && !(hdev->commands[14] & 0x20))
3528 return 0;
3529
3530 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
3531 0, NULL, HCI_CMD_TIMEOUT);
3532}
3533
3534/* BR Controller init stage 1 command sequence */
3535static const struct hci_init_stage br_init1[] = {
3536 /* HCI_OP_READ_LOCAL_FEATURES */
3537 HCI_INIT(hci_read_local_features_sync),
3538 /* HCI_OP_READ_LOCAL_VERSION */
3539 HCI_INIT(hci_read_local_version_sync),
3540 /* HCI_OP_READ_BD_ADDR */
3541 HCI_INIT(hci_read_bd_addr_sync),
3542 {}
3543};
3544
3545/* Read Local Commands */
3546static int hci_read_local_cmds_sync(struct hci_dev *hdev)
3547{
3548 /* All Bluetooth 1.2 and later controllers should support the
3549 * HCI command for reading the local supported commands.
3550 *
3551 * Unfortunately some controllers indicate Bluetooth 1.2 support,
3552 * but do not have support for this command. If that is the case,
3553 * the driver can quirk the behavior and skip reading the local
3554 * supported commands.
3555 */
3556 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
3557 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
3558 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
3559 0, NULL, HCI_CMD_TIMEOUT);
3560
3561 return 0;
3562}
3563
3564/* Read Local AMP Info */
3565static int hci_read_local_amp_info_sync(struct hci_dev *hdev)
3566{
3567 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_AMP_INFO,
3568 0, NULL, HCI_CMD_TIMEOUT);
3569}
3570
3571/* Read Data Blk size */
3572static int hci_read_data_block_size_sync(struct hci_dev *hdev)
3573{
3574 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DATA_BLOCK_SIZE,
3575 0, NULL, HCI_CMD_TIMEOUT);
3576}
3577
3578/* Read Flow Control Mode */
3579static int hci_read_flow_control_mode_sync(struct hci_dev *hdev)
3580{
3581 return __hci_cmd_sync_status(hdev, HCI_OP_READ_FLOW_CONTROL_MODE,
3582 0, NULL, HCI_CMD_TIMEOUT);
3583}
3584
3585/* Read Location Data */
3586static int hci_read_location_data_sync(struct hci_dev *hdev)
3587{
3588 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCATION_DATA,
3589 0, NULL, HCI_CMD_TIMEOUT);
3590}
3591
3592/* AMP Controller init stage 1 command sequence */
3593static const struct hci_init_stage amp_init1[] = {
3594 /* HCI_OP_READ_LOCAL_VERSION */
3595 HCI_INIT(hci_read_local_version_sync),
3596 /* HCI_OP_READ_LOCAL_COMMANDS */
3597 HCI_INIT(hci_read_local_cmds_sync),
3598 /* HCI_OP_READ_LOCAL_AMP_INFO */
3599 HCI_INIT(hci_read_local_amp_info_sync),
3600 /* HCI_OP_READ_DATA_BLOCK_SIZE */
3601 HCI_INIT(hci_read_data_block_size_sync),
3602 /* HCI_OP_READ_FLOW_CONTROL_MODE */
3603 HCI_INIT(hci_read_flow_control_mode_sync),
3604 /* HCI_OP_READ_LOCATION_DATA */
3605 HCI_INIT(hci_read_location_data_sync),
3606 {}
3607};
3608
3609static int hci_init1_sync(struct hci_dev *hdev)
3610{
3611 int err;
3612
3613 bt_dev_dbg(hdev, "");
3614
3615 /* Reset */
3616 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3617 err = hci_reset_sync(hdev);
3618 if (err)
3619 return err;
3620 }
3621
3622 switch (hdev->dev_type) {
3623 case HCI_PRIMARY:
3624 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
3625 return hci_init_stage_sync(hdev, stage: br_init1);
3626 case HCI_AMP:
3627 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
3628 return hci_init_stage_sync(hdev, stage: amp_init1);
3629 default:
3630 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
3631 break;
3632 }
3633
3634 return 0;
3635}
3636
3637/* AMP Controller init stage 2 command sequence */
3638static const struct hci_init_stage amp_init2[] = {
3639 /* HCI_OP_READ_LOCAL_FEATURES */
3640 HCI_INIT(hci_read_local_features_sync),
3641 {}
3642};
3643
3644/* Read Buffer Size (ACL mtu, max pkt, etc.) */
3645static int hci_read_buffer_size_sync(struct hci_dev *hdev)
3646{
3647 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
3648 0, NULL, HCI_CMD_TIMEOUT);
3649}
3650
3651/* Read Class of Device */
3652static int hci_read_dev_class_sync(struct hci_dev *hdev)
3653{
3654 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
3655 0, NULL, HCI_CMD_TIMEOUT);
3656}
3657
3658/* Read Local Name */
3659static int hci_read_local_name_sync(struct hci_dev *hdev)
3660{
3661 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
3662 0, NULL, HCI_CMD_TIMEOUT);
3663}
3664
3665/* Read Voice Setting */
3666static int hci_read_voice_setting_sync(struct hci_dev *hdev)
3667{
3668 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
3669 0, NULL, HCI_CMD_TIMEOUT);
3670}
3671
3672/* Read Number of Supported IAC */
3673static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
3674{
3675 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
3676 0, NULL, HCI_CMD_TIMEOUT);
3677}
3678
3679/* Read Current IAC LAP */
3680static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
3681{
3682 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
3683 0, NULL, HCI_CMD_TIMEOUT);
3684}
3685
3686static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
3687 u8 cond_type, bdaddr_t *bdaddr,
3688 u8 auto_accept)
3689{
3690 struct hci_cp_set_event_filter cp;
3691
3692 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3693 return 0;
3694
3695 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3696 return 0;
3697
3698 memset(&cp, 0, sizeof(cp));
3699 cp.flt_type = flt_type;
3700
3701 if (flt_type != HCI_FLT_CLEAR_ALL) {
3702 cp.cond_type = cond_type;
3703 bacpy(dst: &cp.addr_conn_flt.bdaddr, src: bdaddr);
3704 cp.addr_conn_flt.auto_accept = auto_accept;
3705 }
3706
3707 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
3708 flt_type == HCI_FLT_CLEAR_ALL ?
3709 sizeof(cp.flt_type) : sizeof(cp), &cp,
3710 HCI_CMD_TIMEOUT);
3711}
3712
3713static int hci_clear_event_filter_sync(struct hci_dev *hdev)
3714{
3715 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
3716 return 0;
3717
3718 /* In theory the state machine should not reach here unless
3719 * a hci_set_event_filter_sync() call succeeds, but we do
3720 * the check both for parity and as a future reminder.
3721 */
3722 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3723 return 0;
3724
3725 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, cond_type: 0x00,
3726 BDADDR_ANY, auto_accept: 0x00);
3727}
3728
3729/* Connection accept timeout ~20 secs */
3730static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
3731{
3732 __le16 param = cpu_to_le16(0x7d00);
3733
3734 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
3735 sizeof(param), &param, HCI_CMD_TIMEOUT);
3736}
3737
3738/* BR Controller init stage 2 command sequence */
3739static const struct hci_init_stage br_init2[] = {
3740 /* HCI_OP_READ_BUFFER_SIZE */
3741 HCI_INIT(hci_read_buffer_size_sync),
3742 /* HCI_OP_READ_CLASS_OF_DEV */
3743 HCI_INIT(hci_read_dev_class_sync),
3744 /* HCI_OP_READ_LOCAL_NAME */
3745 HCI_INIT(hci_read_local_name_sync),
3746 /* HCI_OP_READ_VOICE_SETTING */
3747 HCI_INIT(hci_read_voice_setting_sync),
3748 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
3749 HCI_INIT(hci_read_num_supported_iac_sync),
3750 /* HCI_OP_READ_CURRENT_IAC_LAP */
3751 HCI_INIT(hci_read_current_iac_lap_sync),
3752 /* HCI_OP_SET_EVENT_FLT */
3753 HCI_INIT(hci_clear_event_filter_sync),
3754 /* HCI_OP_WRITE_CA_TIMEOUT */
3755 HCI_INIT(hci_write_ca_timeout_sync),
3756 {}
3757};
3758
3759static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
3760{
3761 u8 mode = 0x01;
3762
3763 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3764 return 0;
3765
3766 /* When SSP is available, then the host features page
3767 * should also be available as well. However some
3768 * controllers list the max_page as 0 as long as SSP
3769 * has not been enabled. To achieve proper debugging
3770 * output, force the minimum max_page to 1 at least.
3771 */
3772 hdev->max_page = 0x01;
3773
3774 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3775 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3776}
3777
3778static int hci_write_eir_sync(struct hci_dev *hdev)
3779{
3780 struct hci_cp_write_eir cp;
3781
3782 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3783 return 0;
3784
3785 memset(hdev->eir, 0, sizeof(hdev->eir));
3786 memset(&cp, 0, sizeof(cp));
3787
3788 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
3789 HCI_CMD_TIMEOUT);
3790}
3791
3792static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
3793{
3794 u8 mode;
3795
3796 if (!lmp_inq_rssi_capable(hdev) &&
3797 !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3798 return 0;
3799
3800 /* If Extended Inquiry Result events are supported, then
3801 * they are clearly preferred over Inquiry Result with RSSI
3802 * events.
3803 */
3804 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
3805
3806 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
3807 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3808}
3809
3810static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
3811{
3812 if (!lmp_inq_tx_pwr_capable(hdev))
3813 return 0;
3814
3815 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
3816 0, NULL, HCI_CMD_TIMEOUT);
3817}
3818
3819static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
3820{
3821 struct hci_cp_read_local_ext_features cp;
3822
3823 if (!lmp_ext_feat_capable(hdev))
3824 return 0;
3825
3826 memset(&cp, 0, sizeof(cp));
3827 cp.page = page;
3828
3829 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
3830 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3831}
3832
3833static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
3834{
3835 return hci_read_local_ext_features_sync(hdev, page: 0x01);
3836}
3837
3838/* HCI Controller init stage 2 command sequence */
3839static const struct hci_init_stage hci_init2[] = {
3840 /* HCI_OP_READ_LOCAL_COMMANDS */
3841 HCI_INIT(hci_read_local_cmds_sync),
3842 /* HCI_OP_WRITE_SSP_MODE */
3843 HCI_INIT(hci_write_ssp_mode_1_sync),
3844 /* HCI_OP_WRITE_EIR */
3845 HCI_INIT(hci_write_eir_sync),
3846 /* HCI_OP_WRITE_INQUIRY_MODE */
3847 HCI_INIT(hci_write_inquiry_mode_sync),
3848 /* HCI_OP_READ_INQ_RSP_TX_POWER */
3849 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
3850 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3851 HCI_INIT(hci_read_local_ext_features_1_sync),
3852 /* HCI_OP_WRITE_AUTH_ENABLE */
3853 HCI_INIT(hci_write_auth_enable_sync),
3854 {}
3855};
3856
3857/* Read LE Buffer Size */
3858static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
3859{
3860 /* Use Read LE Buffer Size V2 if supported */
3861 if (iso_capable(hdev) && hdev->commands[41] & 0x20)
3862 return __hci_cmd_sync_status(hdev,
3863 HCI_OP_LE_READ_BUFFER_SIZE_V2,
3864 0, NULL, HCI_CMD_TIMEOUT);
3865
3866 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
3867 0, NULL, HCI_CMD_TIMEOUT);
3868}
3869
3870/* Read LE Local Supported Features */
3871static int hci_le_read_local_features_sync(struct hci_dev *hdev)
3872{
3873 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
3874 0, NULL, HCI_CMD_TIMEOUT);
3875}
3876
3877/* Read LE Supported States */
3878static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
3879{
3880 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
3881 0, NULL, HCI_CMD_TIMEOUT);
3882}
3883
3884/* LE Controller init stage 2 command sequence */
3885static const struct hci_init_stage le_init2[] = {
3886 /* HCI_OP_LE_READ_LOCAL_FEATURES */
3887 HCI_INIT(hci_le_read_local_features_sync),
3888 /* HCI_OP_LE_READ_BUFFER_SIZE */
3889 HCI_INIT(hci_le_read_buffer_size_sync),
3890 /* HCI_OP_LE_READ_SUPPORTED_STATES */
3891 HCI_INIT(hci_le_read_supported_states_sync),
3892 {}
3893};
3894
3895static int hci_init2_sync(struct hci_dev *hdev)
3896{
3897 int err;
3898
3899 bt_dev_dbg(hdev, "");
3900
3901 if (hdev->dev_type == HCI_AMP)
3902 return hci_init_stage_sync(hdev, stage: amp_init2);
3903
3904 err = hci_init_stage_sync(hdev, stage: hci_init2);
3905 if (err)
3906 return err;
3907
3908 if (lmp_bredr_capable(hdev)) {
3909 err = hci_init_stage_sync(hdev, stage: br_init2);
3910 if (err)
3911 return err;
3912 } else {
3913 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
3914 }
3915
3916 if (lmp_le_capable(hdev)) {
3917 err = hci_init_stage_sync(hdev, stage: le_init2);
3918 if (err)
3919 return err;
3920 /* LE-only controllers have LE implicitly enabled */
3921 if (!lmp_bredr_capable(hdev))
3922 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
3923 }
3924
3925 return 0;
3926}
3927
3928static int hci_set_event_mask_sync(struct hci_dev *hdev)
3929{
3930 /* The second byte is 0xff instead of 0x9f (two reserved bits
3931 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
3932 * command otherwise.
3933 */
3934 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
3935
3936 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
3937 * any event mask for pre 1.2 devices.
3938 */
3939 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3940 return 0;
3941
3942 if (lmp_bredr_capable(hdev)) {
3943 events[4] |= 0x01; /* Flow Specification Complete */
3944
3945 /* Don't set Disconnect Complete and mode change when
3946 * suspended as that would wakeup the host when disconnecting
3947 * due to suspend.
3948 */
3949 if (hdev->suspended) {
3950 events[0] &= 0xef;
3951 events[2] &= 0xf7;
3952 }
3953 } else {
3954 /* Use a different default for LE-only devices */
3955 memset(events, 0, sizeof(events));
3956 events[1] |= 0x20; /* Command Complete */
3957 events[1] |= 0x40; /* Command Status */
3958 events[1] |= 0x80; /* Hardware Error */
3959
3960 /* If the controller supports the Disconnect command, enable
3961 * the corresponding event. In addition enable packet flow
3962 * control related events.
3963 */
3964 if (hdev->commands[0] & 0x20) {
3965 /* Don't set Disconnect Complete when suspended as that
3966 * would wakeup the host when disconnecting due to
3967 * suspend.
3968 */
3969 if (!hdev->suspended)
3970 events[0] |= 0x10; /* Disconnection Complete */
3971 events[2] |= 0x04; /* Number of Completed Packets */
3972 events[3] |= 0x02; /* Data Buffer Overflow */
3973 }
3974
3975 /* If the controller supports the Read Remote Version
3976 * Information command, enable the corresponding event.
3977 */
3978 if (hdev->commands[2] & 0x80)
3979 events[1] |= 0x08; /* Read Remote Version Information
3980 * Complete
3981 */
3982
3983 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
3984 events[0] |= 0x80; /* Encryption Change */
3985 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3986 }
3987 }
3988
3989 if (lmp_inq_rssi_capable(hdev) ||
3990 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3991 events[4] |= 0x02; /* Inquiry Result with RSSI */
3992
3993 if (lmp_ext_feat_capable(hdev))
3994 events[4] |= 0x04; /* Read Remote Extended Features Complete */
3995
3996 if (lmp_esco_capable(hdev)) {
3997 events[5] |= 0x08; /* Synchronous Connection Complete */
3998 events[5] |= 0x10; /* Synchronous Connection Changed */
3999 }
4000
4001 if (lmp_sniffsubr_capable(hdev))
4002 events[5] |= 0x20; /* Sniff Subrating */
4003
4004 if (lmp_pause_enc_capable(hdev))
4005 events[5] |= 0x80; /* Encryption Key Refresh Complete */
4006
4007 if (lmp_ext_inq_capable(hdev))
4008 events[5] |= 0x40; /* Extended Inquiry Result */
4009
4010 if (lmp_no_flush_capable(hdev))
4011 events[7] |= 0x01; /* Enhanced Flush Complete */
4012
4013 if (lmp_lsto_capable(hdev))
4014 events[6] |= 0x80; /* Link Supervision Timeout Changed */
4015
4016 if (lmp_ssp_capable(hdev)) {
4017 events[6] |= 0x01; /* IO Capability Request */
4018 events[6] |= 0x02; /* IO Capability Response */
4019 events[6] |= 0x04; /* User Confirmation Request */
4020 events[6] |= 0x08; /* User Passkey Request */
4021 events[6] |= 0x10; /* Remote OOB Data Request */
4022 events[6] |= 0x20; /* Simple Pairing Complete */
4023 events[7] |= 0x04; /* User Passkey Notification */
4024 events[7] |= 0x08; /* Keypress Notification */
4025 events[7] |= 0x10; /* Remote Host Supported
4026 * Features Notification
4027 */
4028 }
4029
4030 if (lmp_le_capable(hdev))
4031 events[7] |= 0x20; /* LE Meta-Event */
4032
4033 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
4034 sizeof(events), events, HCI_CMD_TIMEOUT);
4035}
4036
4037static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
4038{
4039 struct hci_cp_read_stored_link_key cp;
4040
4041 if (!(hdev->commands[6] & 0x20) ||
4042 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
4043 return 0;
4044
4045 memset(&cp, 0, sizeof(cp));
4046 bacpy(dst: &cp.bdaddr, BDADDR_ANY);
4047 cp.read_all = 0x01;
4048
4049 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
4050 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4051}
4052
4053static int hci_setup_link_policy_sync(struct hci_dev *hdev)
4054{
4055 struct hci_cp_write_def_link_policy cp;
4056 u16 link_policy = 0;
4057
4058 if (!(hdev->commands[5] & 0x10))
4059 return 0;
4060
4061 memset(&cp, 0, sizeof(cp));
4062
4063 if (lmp_rswitch_capable(hdev))
4064 link_policy |= HCI_LP_RSWITCH;
4065 if (lmp_hold_capable(hdev))
4066 link_policy |= HCI_LP_HOLD;
4067 if (lmp_sniff_capable(hdev))
4068 link_policy |= HCI_LP_SNIFF;
4069 if (lmp_park_capable(hdev))
4070 link_policy |= HCI_LP_PARK;
4071
4072 cp.policy = cpu_to_le16(link_policy);
4073
4074 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
4075 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4076}
4077
4078static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
4079{
4080 if (!(hdev->commands[8] & 0x01))
4081 return 0;
4082
4083 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
4084 0, NULL, HCI_CMD_TIMEOUT);
4085}
4086
4087static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
4088{
4089 if (!(hdev->commands[18] & 0x04) ||
4090 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4091 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
4092 return 0;
4093
4094 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4095 0, NULL, HCI_CMD_TIMEOUT);
4096}
4097
4098static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
4099{
4100 /* Some older Broadcom based Bluetooth 1.2 controllers do not
4101 * support the Read Page Scan Type command. Check support for
4102 * this command in the bit mask of supported commands.
4103 */
4104 if (!(hdev->commands[13] & 0x01))
4105 return 0;
4106
4107 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
4108 0, NULL, HCI_CMD_TIMEOUT);
4109}
4110
4111/* Read features beyond page 1 if available */
4112static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
4113{
4114 u8 page;
4115 int err;
4116
4117 if (!lmp_ext_feat_capable(hdev))
4118 return 0;
4119
4120 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
4121 page++) {
4122 err = hci_read_local_ext_features_sync(hdev, page);
4123 if (err)
4124 return err;
4125 }
4126
4127 return 0;
4128}
4129
4130/* HCI Controller init stage 3 command sequence */
4131static const struct hci_init_stage hci_init3[] = {
4132 /* HCI_OP_SET_EVENT_MASK */
4133 HCI_INIT(hci_set_event_mask_sync),
4134 /* HCI_OP_READ_STORED_LINK_KEY */
4135 HCI_INIT(hci_read_stored_link_key_sync),
4136 /* HCI_OP_WRITE_DEF_LINK_POLICY */
4137 HCI_INIT(hci_setup_link_policy_sync),
4138 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
4139 HCI_INIT(hci_read_page_scan_activity_sync),
4140 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
4141 HCI_INIT(hci_read_def_err_data_reporting_sync),
4142 /* HCI_OP_READ_PAGE_SCAN_TYPE */
4143 HCI_INIT(hci_read_page_scan_type_sync),
4144 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
4145 HCI_INIT(hci_read_local_ext_features_all_sync),
4146 {}
4147};
4148
4149static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
4150{
4151 u8 events[8];
4152
4153 if (!lmp_le_capable(hdev))
4154 return 0;
4155
4156 memset(events, 0, sizeof(events));
4157
4158 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
4159 events[0] |= 0x10; /* LE Long Term Key Request */
4160
4161 /* If controller supports the Connection Parameters Request
4162 * Link Layer Procedure, enable the corresponding event.
4163 */
4164 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
4165 /* LE Remote Connection Parameter Request */
4166 events[0] |= 0x20;
4167
4168 /* If the controller supports the Data Length Extension
4169 * feature, enable the corresponding event.
4170 */
4171 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
4172 events[0] |= 0x40; /* LE Data Length Change */
4173
4174 /* If the controller supports LL Privacy feature or LE Extended Adv,
4175 * enable the corresponding event.
4176 */
4177 if (use_enhanced_conn_complete(hdev))
4178 events[1] |= 0x02; /* LE Enhanced Connection Complete */
4179
4180 /* If the controller supports Extended Scanner Filter
4181 * Policies, enable the corresponding event.
4182 */
4183 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
4184 events[1] |= 0x04; /* LE Direct Advertising Report */
4185
4186 /* If the controller supports Channel Selection Algorithm #2
4187 * feature, enable the corresponding event.
4188 */
4189 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
4190 events[2] |= 0x08; /* LE Channel Selection Algorithm */
4191
4192 /* If the controller supports the LE Set Scan Enable command,
4193 * enable the corresponding advertising report event.
4194 */
4195 if (hdev->commands[26] & 0x08)
4196 events[0] |= 0x02; /* LE Advertising Report */
4197
4198 /* If the controller supports the LE Create Connection
4199 * command, enable the corresponding event.
4200 */
4201 if (hdev->commands[26] & 0x10)
4202 events[0] |= 0x01; /* LE Connection Complete */
4203
4204 /* If the controller supports the LE Connection Update
4205 * command, enable the corresponding event.
4206 */
4207 if (hdev->commands[27] & 0x04)
4208 events[0] |= 0x04; /* LE Connection Update Complete */
4209
4210 /* If the controller supports the LE Read Remote Used Features
4211 * command, enable the corresponding event.
4212 */
4213 if (hdev->commands[27] & 0x20)
4214 /* LE Read Remote Used Features Complete */
4215 events[0] |= 0x08;
4216
4217 /* If the controller supports the LE Read Local P-256
4218 * Public Key command, enable the corresponding event.
4219 */
4220 if (hdev->commands[34] & 0x02)
4221 /* LE Read Local P-256 Public Key Complete */
4222 events[0] |= 0x80;
4223
4224 /* If the controller supports the LE Generate DHKey
4225 * command, enable the corresponding event.
4226 */
4227 if (hdev->commands[34] & 0x04)
4228 events[1] |= 0x01; /* LE Generate DHKey Complete */
4229
4230 /* If the controller supports the LE Set Default PHY or
4231 * LE Set PHY commands, enable the corresponding event.
4232 */
4233 if (hdev->commands[35] & (0x20 | 0x40))
4234 events[1] |= 0x08; /* LE PHY Update Complete */
4235
4236 /* If the controller supports LE Set Extended Scan Parameters
4237 * and LE Set Extended Scan Enable commands, enable the
4238 * corresponding event.
4239 */
4240 if (use_ext_scan(hdev))
4241 events[1] |= 0x10; /* LE Extended Advertising Report */
4242
4243 /* If the controller supports the LE Extended Advertising
4244 * command, enable the corresponding event.
4245 */
4246 if (ext_adv_capable(hdev))
4247 events[2] |= 0x02; /* LE Advertising Set Terminated */
4248
4249 if (cis_capable(hdev)) {
4250 events[3] |= 0x01; /* LE CIS Established */
4251 if (cis_peripheral_capable(hdev))
4252 events[3] |= 0x02; /* LE CIS Request */
4253 }
4254
4255 if (bis_capable(hdev)) {
4256 events[1] |= 0x20; /* LE PA Report */
4257 events[1] |= 0x40; /* LE PA Sync Established */
4258 events[3] |= 0x04; /* LE Create BIG Complete */
4259 events[3] |= 0x08; /* LE Terminate BIG Complete */
4260 events[3] |= 0x10; /* LE BIG Sync Established */
4261 events[3] |= 0x20; /* LE BIG Sync Loss */
4262 events[4] |= 0x02; /* LE BIG Info Advertising Report */
4263 }
4264
4265 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
4266 sizeof(events), events, HCI_CMD_TIMEOUT);
4267}
4268
4269/* Read LE Advertising Channel TX Power */
4270static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
4271{
4272 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
4273 /* HCI TS spec forbids mixing of legacy and extended
4274 * advertising commands wherein READ_ADV_TX_POWER is
4275 * also included. So do not call it if extended adv
4276 * is supported otherwise controller will return
4277 * COMMAND_DISALLOWED for extended commands.
4278 */
4279 return __hci_cmd_sync_status(hdev,
4280 HCI_OP_LE_READ_ADV_TX_POWER,
4281 0, NULL, HCI_CMD_TIMEOUT);
4282 }
4283
4284 return 0;
4285}
4286
4287/* Read LE Min/Max Tx Power*/
4288static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
4289{
4290 if (!(hdev->commands[38] & 0x80) ||
4291 test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
4292 return 0;
4293
4294 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
4295 0, NULL, HCI_CMD_TIMEOUT);
4296}
4297
4298/* Read LE Accept List Size */
4299static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
4300{
4301 if (!(hdev->commands[26] & 0x40))
4302 return 0;
4303
4304 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4305 0, NULL, HCI_CMD_TIMEOUT);
4306}
4307
4308/* Read LE Resolving List Size */
4309static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
4310{
4311 if (!(hdev->commands[34] & 0x40))
4312 return 0;
4313
4314 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
4315 0, NULL, HCI_CMD_TIMEOUT);
4316}
4317
4318/* Clear LE Resolving List */
4319static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
4320{
4321 if (!(hdev->commands[34] & 0x20))
4322 return 0;
4323
4324 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
4325 HCI_CMD_TIMEOUT);
4326}
4327
4328/* Set RPA timeout */
4329static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
4330{
4331 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
4332
4333 if (!(hdev->commands[35] & 0x04) ||
4334 test_bit(HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT, &hdev->quirks))
4335 return 0;
4336
4337 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
4338 sizeof(timeout), &timeout,
4339 HCI_CMD_TIMEOUT);
4340}
4341
4342/* Read LE Maximum Data Length */
4343static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
4344{
4345 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4346 return 0;
4347
4348 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
4349 HCI_CMD_TIMEOUT);
4350}
4351
4352/* Read LE Suggested Default Data Length */
4353static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
4354{
4355 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4356 return 0;
4357
4358 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
4359 HCI_CMD_TIMEOUT);
4360}
4361
4362/* Read LE Number of Supported Advertising Sets */
4363static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
4364{
4365 if (!ext_adv_capable(hdev))
4366 return 0;
4367
4368 return __hci_cmd_sync_status(hdev,
4369 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4370 0, NULL, HCI_CMD_TIMEOUT);
4371}
4372
4373/* Write LE Host Supported */
4374static int hci_set_le_support_sync(struct hci_dev *hdev)
4375{
4376 struct hci_cp_write_le_host_supported cp;
4377
4378 /* LE-only devices do not support explicit enablement */
4379 if (!lmp_bredr_capable(hdev))
4380 return 0;
4381
4382 memset(&cp, 0, sizeof(cp));
4383
4384 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
4385 cp.le = 0x01;
4386 cp.simul = 0x00;
4387 }
4388
4389 if (cp.le == lmp_host_le_capable(hdev))
4390 return 0;
4391
4392 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
4393 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4394}
4395
4396/* LE Set Host Feature */
4397static int hci_le_set_host_feature_sync(struct hci_dev *hdev)
4398{
4399 struct hci_cp_le_set_host_feature cp;
4400
4401 if (!cis_capable(hdev))
4402 return 0;
4403
4404 memset(&cp, 0, sizeof(cp));
4405
4406 /* Connected Isochronous Channels (Host Support) */
4407 cp.bit_number = 32;
4408 cp.bit_value = 1;
4409
4410 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE,
4411 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4412}
4413
4414/* LE Controller init stage 3 command sequence */
4415static const struct hci_init_stage le_init3[] = {
4416 /* HCI_OP_LE_SET_EVENT_MASK */
4417 HCI_INIT(hci_le_set_event_mask_sync),
4418 /* HCI_OP_LE_READ_ADV_TX_POWER */
4419 HCI_INIT(hci_le_read_adv_tx_power_sync),
4420 /* HCI_OP_LE_READ_TRANSMIT_POWER */
4421 HCI_INIT(hci_le_read_tx_power_sync),
4422 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
4423 HCI_INIT(hci_le_read_accept_list_size_sync),
4424 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
4425 HCI_INIT(hci_le_clear_accept_list_sync),
4426 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
4427 HCI_INIT(hci_le_read_resolv_list_size_sync),
4428 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
4429 HCI_INIT(hci_le_clear_resolv_list_sync),
4430 /* HCI_OP_LE_SET_RPA_TIMEOUT */
4431 HCI_INIT(hci_le_set_rpa_timeout_sync),
4432 /* HCI_OP_LE_READ_MAX_DATA_LEN */
4433 HCI_INIT(hci_le_read_max_data_len_sync),
4434 /* HCI_OP_LE_READ_DEF_DATA_LEN */
4435 HCI_INIT(hci_le_read_def_data_len_sync),
4436 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
4437 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
4438 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
4439 HCI_INIT(hci_set_le_support_sync),
4440 /* HCI_OP_LE_SET_HOST_FEATURE */
4441 HCI_INIT(hci_le_set_host_feature_sync),
4442 {}
4443};
4444
4445static int hci_init3_sync(struct hci_dev *hdev)
4446{
4447 int err;
4448
4449 bt_dev_dbg(hdev, "");
4450
4451 err = hci_init_stage_sync(hdev, stage: hci_init3);
4452 if (err)
4453 return err;
4454
4455 if (lmp_le_capable(hdev))
4456 return hci_init_stage_sync(hdev, stage: le_init3);
4457
4458 return 0;
4459}
4460
4461static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
4462{
4463 struct hci_cp_delete_stored_link_key cp;
4464
4465 /* Some Broadcom based Bluetooth controllers do not support the
4466 * Delete Stored Link Key command. They are clearly indicating its
4467 * absence in the bit mask of supported commands.
4468 *
4469 * Check the supported commands and only if the command is marked
4470 * as supported send it. If not supported assume that the controller
4471 * does not have actual support for stored link keys which makes this
4472 * command redundant anyway.
4473 *
4474 * Some controllers indicate that they support handling deleting
4475 * stored link keys, but they don't. The quirk lets a driver
4476 * just disable this command.
4477 */
4478 if (!(hdev->commands[6] & 0x80) ||
4479 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
4480 return 0;
4481
4482 memset(&cp, 0, sizeof(cp));
4483 bacpy(dst: &cp.bdaddr, BDADDR_ANY);
4484 cp.delete_all = 0x01;
4485
4486 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
4487 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4488}
4489
4490static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
4491{
4492 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
4493 bool changed = false;
4494
4495 /* Set event mask page 2 if the HCI command for it is supported */
4496 if (!(hdev->commands[22] & 0x04))
4497 return 0;
4498
4499 /* If Connectionless Peripheral Broadcast central role is supported
4500 * enable all necessary events for it.
4501 */
4502 if (lmp_cpb_central_capable(hdev)) {
4503 events[1] |= 0x40; /* Triggered Clock Capture */
4504 events[1] |= 0x80; /* Synchronization Train Complete */
4505 events[2] |= 0x08; /* Truncated Page Complete */
4506 events[2] |= 0x20; /* CPB Channel Map Change */
4507 changed = true;
4508 }
4509
4510 /* If Connectionless Peripheral Broadcast peripheral role is supported
4511 * enable all necessary events for it.
4512 */
4513 if (lmp_cpb_peripheral_capable(hdev)) {
4514 events[2] |= 0x01; /* Synchronization Train Received */
4515 events[2] |= 0x02; /* CPB Receive */
4516 events[2] |= 0x04; /* CPB Timeout */
4517 events[2] |= 0x10; /* Peripheral Page Response Timeout */
4518 changed = true;
4519 }
4520
4521 /* Enable Authenticated Payload Timeout Expired event if supported */
4522 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
4523 events[2] |= 0x80;
4524 changed = true;
4525 }
4526
4527 /* Some Broadcom based controllers indicate support for Set Event
4528 * Mask Page 2 command, but then actually do not support it. Since
4529 * the default value is all bits set to zero, the command is only
4530 * required if the event mask has to be changed. In case no change
4531 * to the event mask is needed, skip this command.
4532 */
4533 if (!changed)
4534 return 0;
4535
4536 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
4537 sizeof(events), events, HCI_CMD_TIMEOUT);
4538}
4539
4540/* Read local codec list if the HCI command is supported */
4541static int hci_read_local_codecs_sync(struct hci_dev *hdev)
4542{
4543 if (hdev->commands[45] & 0x04)
4544 hci_read_supported_codecs_v2(hdev);
4545 else if (hdev->commands[29] & 0x20)
4546 hci_read_supported_codecs(hdev);
4547
4548 return 0;
4549}
4550
4551/* Read local pairing options if the HCI command is supported */
4552static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
4553{
4554 if (!(hdev->commands[41] & 0x08))
4555 return 0;
4556
4557 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
4558 0, NULL, HCI_CMD_TIMEOUT);
4559}
4560
4561/* Get MWS transport configuration if the HCI command is supported */
4562static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
4563{
4564 if (!mws_transport_config_capable(hdev))
4565 return 0;
4566
4567 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
4568 0, NULL, HCI_CMD_TIMEOUT);
4569}
4570
4571/* Check for Synchronization Train support */
4572static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
4573{
4574 if (!lmp_sync_train_capable(hdev))
4575 return 0;
4576
4577 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
4578 0, NULL, HCI_CMD_TIMEOUT);
4579}
4580
4581/* Enable Secure Connections if supported and configured */
4582static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
4583{
4584 u8 support = 0x01;
4585
4586 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
4587 !bredr_sc_enabled(hdev))
4588 return 0;
4589
4590 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
4591 sizeof(support), &support,
4592 HCI_CMD_TIMEOUT);
4593}
4594
4595/* Set erroneous data reporting if supported to the wideband speech
4596 * setting value
4597 */
4598static int hci_set_err_data_report_sync(struct hci_dev *hdev)
4599{
4600 struct hci_cp_write_def_err_data_reporting cp;
4601 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
4602
4603 if (!(hdev->commands[18] & 0x08) ||
4604 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4605 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
4606 return 0;
4607
4608 if (enabled == hdev->err_data_reporting)
4609 return 0;
4610
4611 memset(&cp, 0, sizeof(cp));
4612 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
4613 ERR_DATA_REPORTING_DISABLED;
4614
4615 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4616 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4617}
4618
4619static const struct hci_init_stage hci_init4[] = {
4620 /* HCI_OP_DELETE_STORED_LINK_KEY */
4621 HCI_INIT(hci_delete_stored_link_key_sync),
4622 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
4623 HCI_INIT(hci_set_event_mask_page_2_sync),
4624 /* HCI_OP_READ_LOCAL_CODECS */
4625 HCI_INIT(hci_read_local_codecs_sync),
4626 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
4627 HCI_INIT(hci_read_local_pairing_opts_sync),
4628 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
4629 HCI_INIT(hci_get_mws_transport_config_sync),
4630 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
4631 HCI_INIT(hci_read_sync_train_params_sync),
4632 /* HCI_OP_WRITE_SC_SUPPORT */
4633 HCI_INIT(hci_write_sc_support_1_sync),
4634 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
4635 HCI_INIT(hci_set_err_data_report_sync),
4636 {}
4637};
4638
4639/* Set Suggested Default Data Length to maximum if supported */
4640static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
4641{
4642 struct hci_cp_le_write_def_data_len cp;
4643
4644 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4645 return 0;
4646
4647 memset(&cp, 0, sizeof(cp));
4648 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
4649 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
4650
4651 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
4652 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4653}
4654
4655/* Set Default PHY parameters if command is supported, enables all supported
4656 * PHYs according to the LE Features bits.
4657 */
4658static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
4659{
4660 struct hci_cp_le_set_default_phy cp;
4661
4662 if (!(hdev->commands[35] & 0x20)) {
4663 /* If the command is not supported it means only 1M PHY is
4664 * supported.
4665 */
4666 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
4667 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
4668 return 0;
4669 }
4670
4671 memset(&cp, 0, sizeof(cp));
4672 cp.all_phys = 0x00;
4673 cp.tx_phys = HCI_LE_SET_PHY_1M;
4674 cp.rx_phys = HCI_LE_SET_PHY_1M;
4675
4676 /* Enables 2M PHY if supported */
4677 if (le_2m_capable(hdev)) {
4678 cp.tx_phys |= HCI_LE_SET_PHY_2M;
4679 cp.rx_phys |= HCI_LE_SET_PHY_2M;
4680 }
4681
4682 /* Enables Coded PHY if supported */
4683 if (le_coded_capable(hdev)) {
4684 cp.tx_phys |= HCI_LE_SET_PHY_CODED;
4685 cp.rx_phys |= HCI_LE_SET_PHY_CODED;
4686 }
4687
4688 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
4689 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4690}
4691
4692static const struct hci_init_stage le_init4[] = {
4693 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
4694 HCI_INIT(hci_le_set_write_def_data_len_sync),
4695 /* HCI_OP_LE_SET_DEFAULT_PHY */
4696 HCI_INIT(hci_le_set_default_phy_sync),
4697 {}
4698};
4699
4700static int hci_init4_sync(struct hci_dev *hdev)
4701{
4702 int err;
4703
4704 bt_dev_dbg(hdev, "");
4705
4706 err = hci_init_stage_sync(hdev, stage: hci_init4);
4707 if (err)
4708 return err;
4709
4710 if (lmp_le_capable(hdev))
4711 return hci_init_stage_sync(hdev, stage: le_init4);
4712
4713 return 0;
4714}
4715
4716static int hci_init_sync(struct hci_dev *hdev)
4717{
4718 int err;
4719
4720 err = hci_init1_sync(hdev);
4721 if (err < 0)
4722 return err;
4723
4724 if (hci_dev_test_flag(hdev, HCI_SETUP))
4725 hci_debugfs_create_basic(hdev);
4726
4727 err = hci_init2_sync(hdev);
4728 if (err < 0)
4729 return err;
4730
4731 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
4732 * BR/EDR/LE type controllers. AMP controllers only need the
4733 * first two stages of init.
4734 */
4735 if (hdev->dev_type != HCI_PRIMARY)
4736 return 0;
4737
4738 err = hci_init3_sync(hdev);
4739 if (err < 0)
4740 return err;
4741
4742 err = hci_init4_sync(hdev);
4743 if (err < 0)
4744 return err;
4745
4746 /* This function is only called when the controller is actually in
4747 * configured state. When the controller is marked as unconfigured,
4748 * this initialization procedure is not run.
4749 *
4750 * It means that it is possible that a controller runs through its
4751 * setup phase and then discovers missing settings. If that is the
4752 * case, then this function will not be called. It then will only
4753 * be called during the config phase.
4754 *
4755 * So only when in setup phase or config phase, create the debugfs
4756 * entries and register the SMP channels.
4757 */
4758 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4759 !hci_dev_test_flag(hdev, HCI_CONFIG))
4760 return 0;
4761
4762 if (hci_dev_test_and_set_flag(hdev, HCI_DEBUGFS_CREATED))
4763 return 0;
4764
4765 hci_debugfs_create_common(hdev);
4766
4767 if (lmp_bredr_capable(hdev))
4768 hci_debugfs_create_bredr(hdev);
4769
4770 if (lmp_le_capable(hdev))
4771 hci_debugfs_create_le(hdev);
4772
4773 return 0;
4774}
4775
4776#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
4777
4778static const struct {
4779 unsigned long quirk;
4780 const char *desc;
4781} hci_broken_table[] = {
4782 HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
4783 "HCI Read Local Supported Commands not supported"),
4784 HCI_QUIRK_BROKEN(STORED_LINK_KEY,
4785 "HCI Delete Stored Link Key command is advertised, "
4786 "but not supported."),
4787 HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
4788 "HCI Read Default Erroneous Data Reporting command is "
4789 "advertised, but not supported."),
4790 HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
4791 "HCI Read Transmit Power Level command is advertised, "
4792 "but not supported."),
4793 HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
4794 "HCI Set Event Filter command not supported."),
4795 HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
4796 "HCI Enhanced Setup Synchronous Connection command is "
4797 "advertised, but not supported."),
4798 HCI_QUIRK_BROKEN(SET_RPA_TIMEOUT,
4799 "HCI LE Set Random Private Address Timeout command is "
4800 "advertised, but not supported."),
4801 HCI_QUIRK_BROKEN(LE_CODED,
4802 "HCI LE Coded PHY feature bit is set, "
4803 "but its usage is not supported.")
4804};
4805
4806/* This function handles hdev setup stage:
4807 *
4808 * Calls hdev->setup
4809 * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set.
4810 */
4811static int hci_dev_setup_sync(struct hci_dev *hdev)
4812{
4813 int ret = 0;
4814 bool invalid_bdaddr;
4815 size_t i;
4816
4817 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4818 !test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks))
4819 return 0;
4820
4821 bt_dev_dbg(hdev, "");
4822
4823 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
4824
4825 if (hdev->setup)
4826 ret = hdev->setup(hdev);
4827
4828 for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
4829 if (test_bit(hci_broken_table[i].quirk, &hdev->quirks))
4830 bt_dev_warn(hdev, "%s", hci_broken_table[i].desc);
4831 }
4832
4833 /* The transport driver can set the quirk to mark the
4834 * BD_ADDR invalid before creating the HCI device or in
4835 * its setup callback.
4836 */
4837 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
4838 test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
4839 if (!ret) {
4840 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks) &&
4841 !bacmp(ba1: &hdev->public_addr, BDADDR_ANY))
4842 hci_dev_get_bd_addr_from_property(hdev);
4843
4844 if (invalid_bdaddr && bacmp(ba1: &hdev->public_addr, BDADDR_ANY) &&
4845 hdev->set_bdaddr) {
4846 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4847 if (!ret)
4848 invalid_bdaddr = false;
4849 }
4850 }
4851
4852 /* The transport driver can set these quirks before
4853 * creating the HCI device or in its setup callback.
4854 *
4855 * For the invalid BD_ADDR quirk it is possible that
4856 * it becomes a valid address if the bootloader does
4857 * provide it (see above).
4858 *
4859 * In case any of them is set, the controller has to
4860 * start up as unconfigured.
4861 */
4862 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
4863 invalid_bdaddr)
4864 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
4865
4866 /* For an unconfigured controller it is required to
4867 * read at least the version information provided by
4868 * the Read Local Version Information command.
4869 *
4870 * If the set_bdaddr driver callback is provided, then
4871 * also the original Bluetooth public device address
4872 * will be read using the Read BD Address command.
4873 */
4874 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4875 return hci_unconf_init_sync(hdev);
4876
4877 return ret;
4878}
4879
4880/* This function handles hdev init stage:
4881 *
4882 * Calls hci_dev_setup_sync to perform setup stage
4883 * Calls hci_init_sync to perform HCI command init sequence
4884 */
4885static int hci_dev_init_sync(struct hci_dev *hdev)
4886{
4887 int ret;
4888
4889 bt_dev_dbg(hdev, "");
4890
4891 atomic_set(v: &hdev->cmd_cnt, i: 1);
4892 set_bit(nr: HCI_INIT, addr: &hdev->flags);
4893
4894 ret = hci_dev_setup_sync(hdev);
4895
4896 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
4897 /* If public address change is configured, ensure that
4898 * the address gets programmed. If the driver does not
4899 * support changing the public address, fail the power
4900 * on procedure.
4901 */
4902 if (bacmp(ba1: &hdev->public_addr, BDADDR_ANY) &&
4903 hdev->set_bdaddr)
4904 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4905 else
4906 ret = -EADDRNOTAVAIL;
4907 }
4908
4909 if (!ret) {
4910 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4911 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4912 ret = hci_init_sync(hdev);
4913 if (!ret && hdev->post_init)
4914 ret = hdev->post_init(hdev);
4915 }
4916 }
4917
4918 /* If the HCI Reset command is clearing all diagnostic settings,
4919 * then they need to be reprogrammed after the init procedure
4920 * completed.
4921 */
4922 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
4923 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4924 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
4925 ret = hdev->set_diag(hdev, true);
4926
4927 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4928 msft_do_open(hdev);
4929 aosp_do_open(hdev);
4930 }
4931
4932 clear_bit(nr: HCI_INIT, addr: &hdev->flags);
4933
4934 return ret;
4935}
4936
4937int hci_dev_open_sync(struct hci_dev *hdev)
4938{
4939 int ret;
4940
4941 bt_dev_dbg(hdev, "");
4942
4943 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
4944 ret = -ENODEV;
4945 goto done;
4946 }
4947
4948 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4949 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
4950 /* Check for rfkill but allow the HCI setup stage to
4951 * proceed (which in itself doesn't cause any RF activity).
4952 */
4953 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
4954 ret = -ERFKILL;
4955 goto done;
4956 }
4957
4958 /* Check for valid public address or a configured static
4959 * random address, but let the HCI setup proceed to
4960 * be able to determine if there is a public address
4961 * or not.
4962 *
4963 * In case of user channel usage, it is not important
4964 * if a public address or static random address is
4965 * available.
4966 *
4967 * This check is only valid for BR/EDR controllers
4968 * since AMP controllers do not have an address.
4969 */
4970 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4971 hdev->dev_type == HCI_PRIMARY &&
4972 !bacmp(ba1: &hdev->bdaddr, BDADDR_ANY) &&
4973 !bacmp(ba1: &hdev->static_addr, BDADDR_ANY)) {
4974 ret = -EADDRNOTAVAIL;
4975 goto done;
4976 }
4977 }
4978
4979 if (test_bit(HCI_UP, &hdev->flags)) {
4980 ret = -EALREADY;
4981 goto done;
4982 }
4983
4984 if (hdev->open(hdev)) {
4985 ret = -EIO;
4986 goto done;
4987 }
4988
4989 hci_devcd_reset(hdev);
4990
4991 set_bit(nr: HCI_RUNNING, addr: &hdev->flags);
4992 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
4993
4994 ret = hci_dev_init_sync(hdev);
4995 if (!ret) {
4996 hci_dev_hold(d: hdev);
4997 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
4998 hci_adv_instances_set_rpa_expired(hdev, rpa_expired: true);
4999 set_bit(nr: HCI_UP, addr: &hdev->flags);
5000 hci_sock_dev_event(hdev, HCI_DEV_UP);
5001 hci_leds_update_powered(hdev, enabled: true);
5002 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
5003 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
5004 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
5005 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5006 hci_dev_test_flag(hdev, HCI_MGMT) &&
5007 hdev->dev_type == HCI_PRIMARY) {
5008 ret = hci_powered_update_sync(hdev);
5009 mgmt_power_on(hdev, err: ret);
5010 }
5011 } else {
5012 /* Init failed, cleanup */
5013 flush_work(work: &hdev->tx_work);
5014
5015 /* Since hci_rx_work() is possible to awake new cmd_work
5016 * it should be flushed first to avoid unexpected call of
5017 * hci_cmd_work()
5018 */
5019 flush_work(work: &hdev->rx_work);
5020 flush_work(work: &hdev->cmd_work);
5021
5022 skb_queue_purge(list: &hdev->cmd_q);
5023 skb_queue_purge(list: &hdev->rx_q);
5024
5025 if (hdev->flush)
5026 hdev->flush(hdev);
5027
5028 if (hdev->sent_cmd) {
5029 cancel_delayed_work_sync(dwork: &hdev->cmd_timer);
5030 kfree_skb(skb: hdev->sent_cmd);
5031 hdev->sent_cmd = NULL;
5032 }
5033
5034 if (hdev->req_skb) {
5035 kfree_skb(skb: hdev->req_skb);
5036 hdev->req_skb = NULL;
5037 }
5038
5039 clear_bit(nr: HCI_RUNNING, addr: &hdev->flags);
5040 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
5041
5042 hdev->close(hdev);
5043 hdev->flags &= BIT(HCI_RAW);
5044 }
5045
5046done:
5047 return ret;
5048}
5049
5050/* This function requires the caller holds hdev->lock */
5051static void hci_pend_le_actions_clear(struct hci_dev *hdev)
5052{
5053 struct hci_conn_params *p;
5054
5055 list_for_each_entry(p, &hdev->le_conn_params, list) {
5056 hci_pend_le_list_del_init(param: p);
5057 if (p->conn) {
5058 hci_conn_drop(conn: p->conn);
5059 hci_conn_put(conn: p->conn);
5060 p->conn = NULL;
5061 }
5062 }
5063
5064 BT_DBG("All LE pending actions cleared");
5065}
5066
5067static int hci_dev_shutdown(struct hci_dev *hdev)
5068{
5069 int err = 0;
5070 /* Similar to how we first do setup and then set the exclusive access
5071 * bit for userspace, we must first unset userchannel and then clean up.
5072 * Otherwise, the kernel can't properly use the hci channel to clean up
5073 * the controller (some shutdown routines require sending additional
5074 * commands to the controller for example).
5075 */
5076 bool was_userchannel =
5077 hci_dev_test_and_clear_flag(hdev, HCI_USER_CHANNEL);
5078
5079 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
5080 test_bit(HCI_UP, &hdev->flags)) {
5081 /* Execute vendor specific shutdown routine */
5082 if (hdev->shutdown)
5083 err = hdev->shutdown(hdev);
5084 }
5085
5086 if (was_userchannel)
5087 hci_dev_set_flag(hdev, HCI_USER_CHANNEL);
5088
5089 return err;
5090}
5091
5092int hci_dev_close_sync(struct hci_dev *hdev)
5093{
5094 bool auto_off;
5095 int err = 0;
5096
5097 bt_dev_dbg(hdev, "");
5098
5099 cancel_delayed_work(dwork: &hdev->power_off);
5100 cancel_delayed_work(dwork: &hdev->ncmd_timer);
5101 cancel_delayed_work(dwork: &hdev->le_scan_disable);
5102
5103 hci_request_cancel_all(hdev);
5104
5105 if (hdev->adv_instance_timeout) {
5106 cancel_delayed_work_sync(dwork: &hdev->adv_instance_expire);
5107 hdev->adv_instance_timeout = 0;
5108 }
5109
5110 err = hci_dev_shutdown(hdev);
5111
5112 if (!test_and_clear_bit(nr: HCI_UP, addr: &hdev->flags)) {
5113 cancel_delayed_work_sync(dwork: &hdev->cmd_timer);
5114 return err;
5115 }
5116
5117 hci_leds_update_powered(hdev, enabled: false);
5118
5119 /* Flush RX and TX works */
5120 flush_work(work: &hdev->tx_work);
5121 flush_work(work: &hdev->rx_work);
5122
5123 if (hdev->discov_timeout > 0) {
5124 hdev->discov_timeout = 0;
5125 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
5126 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
5127 }
5128
5129 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
5130 cancel_delayed_work(dwork: &hdev->service_cache);
5131
5132 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
5133 struct adv_info *adv_instance;
5134
5135 cancel_delayed_work_sync(dwork: &hdev->rpa_expired);
5136
5137 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
5138 cancel_delayed_work_sync(dwork: &adv_instance->rpa_expired_cb);
5139 }
5140
5141 /* Avoid potential lockdep warnings from the *_flush() calls by
5142 * ensuring the workqueue is empty up front.
5143 */
5144 drain_workqueue(wq: hdev->workqueue);
5145
5146 hci_dev_lock(hdev);
5147
5148 hci_discovery_set_state(hdev, state: DISCOVERY_STOPPED);
5149
5150 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
5151
5152 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
5153 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5154 hci_dev_test_flag(hdev, HCI_MGMT))
5155 __mgmt_power_off(hdev);
5156
5157 hci_inquiry_cache_flush(hdev);
5158 hci_pend_le_actions_clear(hdev);
5159 hci_conn_hash_flush(hdev);
5160 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
5161 smp_unregister(hdev);
5162 hci_dev_unlock(hdev);
5163
5164 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
5165
5166 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5167 aosp_do_close(hdev);
5168 msft_do_close(hdev);
5169 }
5170
5171 if (hdev->flush)
5172 hdev->flush(hdev);
5173
5174 /* Reset device */
5175 skb_queue_purge(list: &hdev->cmd_q);
5176 atomic_set(v: &hdev->cmd_cnt, i: 1);
5177 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
5178 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
5179 set_bit(nr: HCI_INIT, addr: &hdev->flags);
5180 hci_reset_sync(hdev);
5181 clear_bit(nr: HCI_INIT, addr: &hdev->flags);
5182 }
5183
5184 /* flush cmd work */
5185 flush_work(work: &hdev->cmd_work);
5186
5187 /* Drop queues */
5188 skb_queue_purge(list: &hdev->rx_q);
5189 skb_queue_purge(list: &hdev->cmd_q);
5190 skb_queue_purge(list: &hdev->raw_q);
5191
5192 /* Drop last sent command */
5193 if (hdev->sent_cmd) {
5194 cancel_delayed_work_sync(dwork: &hdev->cmd_timer);
5195 kfree_skb(skb: hdev->sent_cmd);
5196 hdev->sent_cmd = NULL;
5197 }
5198
5199 /* Drop last request */
5200 if (hdev->req_skb) {
5201 kfree_skb(skb: hdev->req_skb);
5202 hdev->req_skb = NULL;
5203 }
5204
5205 clear_bit(nr: HCI_RUNNING, addr: &hdev->flags);
5206 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
5207
5208 /* After this point our queues are empty and no tasks are scheduled. */
5209 hdev->close(hdev);
5210
5211 /* Clear flags */
5212 hdev->flags &= BIT(HCI_RAW);
5213 hci_dev_clear_volatile_flags(hdev);
5214
5215 /* Controller radio is available but is currently powered down */
5216 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
5217
5218 memset(hdev->eir, 0, sizeof(hdev->eir));
5219 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
5220 bacpy(dst: &hdev->random_addr, BDADDR_ANY);
5221 hci_codec_list_clear(codec_list: &hdev->local_codecs);
5222
5223 hci_dev_put(d: hdev);
5224 return err;
5225}
5226
5227/* This function perform power on HCI command sequence as follows:
5228 *
5229 * If controller is already up (HCI_UP) performs hci_powered_update_sync
5230 * sequence otherwise run hci_dev_open_sync which will follow with
5231 * hci_powered_update_sync after the init sequence is completed.
5232 */
5233static int hci_power_on_sync(struct hci_dev *hdev)
5234{
5235 int err;
5236
5237 if (test_bit(HCI_UP, &hdev->flags) &&
5238 hci_dev_test_flag(hdev, HCI_MGMT) &&
5239 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
5240 cancel_delayed_work(dwork: &hdev->power_off);
5241 return hci_powered_update_sync(hdev);
5242 }
5243
5244 err = hci_dev_open_sync(hdev);
5245 if (err < 0)
5246 return err;
5247
5248 /* During the HCI setup phase, a few error conditions are
5249 * ignored and they need to be checked now. If they are still
5250 * valid, it is important to return the device back off.
5251 */
5252 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
5253 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
5254 (hdev->dev_type == HCI_PRIMARY &&
5255 !bacmp(ba1: &hdev->bdaddr, BDADDR_ANY) &&
5256 !bacmp(ba1: &hdev->static_addr, BDADDR_ANY))) {
5257 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
5258 hci_dev_close_sync(hdev);
5259 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
5260 queue_delayed_work(wq: hdev->req_workqueue, dwork: &hdev->power_off,
5261 HCI_AUTO_OFF_TIMEOUT);
5262 }
5263
5264 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
5265 /* For unconfigured devices, set the HCI_RAW flag
5266 * so that userspace can easily identify them.
5267 */
5268 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5269 set_bit(nr: HCI_RAW, addr: &hdev->flags);
5270
5271 /* For fully configured devices, this will send
5272 * the Index Added event. For unconfigured devices,
5273 * it will send Unconfigued Index Added event.
5274 *
5275 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
5276 * and no event will be send.
5277 */
5278 mgmt_index_added(hdev);
5279 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
5280 /* When the controller is now configured, then it
5281 * is important to clear the HCI_RAW flag.
5282 */
5283 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5284 clear_bit(nr: HCI_RAW, addr: &hdev->flags);
5285
5286 /* Powering on the controller with HCI_CONFIG set only
5287 * happens with the transition from unconfigured to
5288 * configured. This will send the Index Added event.
5289 */
5290 mgmt_index_added(hdev);
5291 }
5292
5293 return 0;
5294}
5295
5296static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
5297{
5298 struct hci_cp_remote_name_req_cancel cp;
5299
5300 memset(&cp, 0, sizeof(cp));
5301 bacpy(dst: &cp.bdaddr, src: addr);
5302
5303 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
5304 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5305}
5306
5307int hci_stop_discovery_sync(struct hci_dev *hdev)
5308{
5309 struct discovery_state *d = &hdev->discovery;
5310 struct inquiry_entry *e;
5311 int err;
5312
5313 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
5314
5315 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
5316 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
5317 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
5318 0, NULL, HCI_CMD_TIMEOUT);
5319 if (err)
5320 return err;
5321 }
5322
5323 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5324 cancel_delayed_work(dwork: &hdev->le_scan_disable);
5325
5326 err = hci_scan_disable_sync(hdev);
5327 if (err)
5328 return err;
5329 }
5330
5331 } else {
5332 err = hci_scan_disable_sync(hdev);
5333 if (err)
5334 return err;
5335 }
5336
5337 /* Resume advertising if it was paused */
5338 if (use_ll_privacy(hdev))
5339 hci_resume_advertising_sync(hdev);
5340
5341 /* No further actions needed for LE-only discovery */
5342 if (d->type == DISCOV_TYPE_LE)
5343 return 0;
5344
5345 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
5346 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
5347 state: NAME_PENDING);
5348 if (!e)
5349 return 0;
5350
5351 return hci_remote_name_cancel_sync(hdev, addr: &e->data.bdaddr);
5352 }
5353
5354 return 0;
5355}
5356
5357static int hci_disconnect_phy_link_sync(struct hci_dev *hdev, u16 handle,
5358 u8 reason)
5359{
5360 struct hci_cp_disconn_phy_link cp;
5361
5362 memset(&cp, 0, sizeof(cp));
5363 cp.phy_handle = HCI_PHY_HANDLE(handle);
5364 cp.reason = reason;
5365
5366 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONN_PHY_LINK,
5367 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5368}
5369
5370static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
5371 u8 reason)
5372{
5373 struct hci_cp_disconnect cp;
5374
5375 if (conn->type == AMP_LINK)
5376 return hci_disconnect_phy_link_sync(hdev, handle: conn->handle, reason);
5377
5378 if (test_bit(HCI_CONN_BIG_CREATED, &conn->flags)) {
5379 /* This is a BIS connection, hci_conn_del will
5380 * do the necessary cleanup.
5381 */
5382 hci_dev_lock(hdev);
5383 hci_conn_failed(conn, status: reason);
5384 hci_dev_unlock(hdev);
5385
5386 return 0;
5387 }
5388
5389 memset(&cp, 0, sizeof(cp));
5390 cp.handle = cpu_to_le16(conn->handle);
5391 cp.reason = reason;
5392
5393 /* Wait for HCI_EV_DISCONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5394 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5395 * used when suspending or powering off, where we don't want to wait
5396 * for the peer's response.
5397 */
5398 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5399 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
5400 sizeof(cp), &cp,
5401 HCI_EV_DISCONN_COMPLETE,
5402 HCI_CMD_TIMEOUT, NULL);
5403
5404 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
5405 HCI_CMD_TIMEOUT);
5406}
5407
5408static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
5409 struct hci_conn *conn, u8 reason)
5410{
5411 /* Return reason if scanning since the connection shall probably be
5412 * cleanup directly.
5413 */
5414 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
5415 return reason;
5416
5417 if (conn->role == HCI_ROLE_SLAVE ||
5418 test_and_set_bit(nr: HCI_CONN_CANCEL, addr: &conn->flags))
5419 return 0;
5420
5421 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
5422 0, NULL, HCI_CMD_TIMEOUT);
5423}
5424
5425static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn,
5426 u8 reason)
5427{
5428 if (conn->type == LE_LINK)
5429 return hci_le_connect_cancel_sync(hdev, conn, reason);
5430
5431 if (conn->type == ISO_LINK) {
5432 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
5433 * page 1857:
5434 *
5435 * If this command is issued for a CIS on the Central and the
5436 * CIS is successfully terminated before being established,
5437 * then an HCI_LE_CIS_Established event shall also be sent for
5438 * this CIS with the Status Operation Cancelled by Host (0x44).
5439 */
5440 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
5441 return hci_disconnect_sync(hdev, conn, reason);
5442
5443 /* CIS with no Create CIS sent have nothing to cancel */
5444 if (bacmp(ba1: &conn->dst, BDADDR_ANY))
5445 return HCI_ERROR_LOCAL_HOST_TERM;
5446
5447 /* There is no way to cancel a BIS without terminating the BIG
5448 * which is done later on connection cleanup.
5449 */
5450 return 0;
5451 }
5452
5453 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
5454 return 0;
5455
5456 /* Wait for HCI_EV_CONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5457 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5458 * used when suspending or powering off, where we don't want to wait
5459 * for the peer's response.
5460 */
5461 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5462 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN_CANCEL,
5463 6, &conn->dst,
5464 HCI_EV_CONN_COMPLETE,
5465 HCI_CMD_TIMEOUT, NULL);
5466
5467 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
5468 6, &conn->dst, HCI_CMD_TIMEOUT);
5469}
5470
5471static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
5472 u8 reason)
5473{
5474 struct hci_cp_reject_sync_conn_req cp;
5475
5476 memset(&cp, 0, sizeof(cp));
5477 bacpy(dst: &cp.bdaddr, src: &conn->dst);
5478 cp.reason = reason;
5479
5480 /* SCO rejection has its own limited set of
5481 * allowed error values (0x0D-0x0F).
5482 */
5483 if (reason < 0x0d || reason > 0x0f)
5484 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
5485
5486 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
5487 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5488}
5489
5490static int hci_le_reject_cis_sync(struct hci_dev *hdev, struct hci_conn *conn,
5491 u8 reason)
5492{
5493 struct hci_cp_le_reject_cis cp;
5494
5495 memset(&cp, 0, sizeof(cp));
5496 cp.handle = cpu_to_le16(conn->handle);
5497 cp.reason = reason;
5498
5499 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REJECT_CIS,
5500 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5501}
5502
5503static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
5504 u8 reason)
5505{
5506 struct hci_cp_reject_conn_req cp;
5507
5508 if (conn->type == ISO_LINK)
5509 return hci_le_reject_cis_sync(hdev, conn, reason);
5510
5511 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
5512 return hci_reject_sco_sync(hdev, conn, reason);
5513
5514 memset(&cp, 0, sizeof(cp));
5515 bacpy(dst: &cp.bdaddr, src: &conn->dst);
5516 cp.reason = reason;
5517
5518 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
5519 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5520}
5521
5522int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
5523{
5524 int err = 0;
5525 u16 handle = conn->handle;
5526 bool disconnect = false;
5527 struct hci_conn *c;
5528
5529 switch (conn->state) {
5530 case BT_CONNECTED:
5531 case BT_CONFIG:
5532 err = hci_disconnect_sync(hdev, conn, reason);
5533 break;
5534 case BT_CONNECT:
5535 err = hci_connect_cancel_sync(hdev, conn, reason);
5536 break;
5537 case BT_CONNECT2:
5538 err = hci_reject_conn_sync(hdev, conn, reason);
5539 break;
5540 case BT_OPEN:
5541 case BT_BOUND:
5542 break;
5543 default:
5544 disconnect = true;
5545 break;
5546 }
5547
5548 hci_dev_lock(hdev);
5549
5550 /* Check if the connection has been cleaned up concurrently */
5551 c = hci_conn_hash_lookup_handle(hdev, handle);
5552 if (!c || c != conn) {
5553 err = 0;
5554 goto unlock;
5555 }
5556
5557 /* Cleanup hci_conn object if it cannot be cancelled as it
5558 * likelly means the controller and host stack are out of sync
5559 * or in case of LE it was still scanning so it can be cleanup
5560 * safely.
5561 */
5562 if (disconnect) {
5563 conn->state = BT_CLOSED;
5564 hci_disconn_cfm(conn, reason);
5565 hci_conn_del(conn);
5566 } else {
5567 hci_conn_failed(conn, status: reason);
5568 }
5569
5570unlock:
5571 hci_dev_unlock(hdev);
5572 return err;
5573}
5574
5575static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
5576{
5577 struct list_head *head = &hdev->conn_hash.list;
5578 struct hci_conn *conn;
5579
5580 rcu_read_lock();
5581 while ((conn = list_first_or_null_rcu(head, struct hci_conn, list))) {
5582 /* Make sure the connection is not freed while unlocking */
5583 conn = hci_conn_get(conn);
5584 rcu_read_unlock();
5585 /* Disregard possible errors since hci_conn_del shall have been
5586 * called even in case of errors had occurred since it would
5587 * then cause hci_conn_failed to be called which calls
5588 * hci_conn_del internally.
5589 */
5590 hci_abort_conn_sync(hdev, conn, reason);
5591 hci_conn_put(conn);
5592 rcu_read_lock();
5593 }
5594 rcu_read_unlock();
5595
5596 return 0;
5597}
5598
5599/* This function perform power off HCI command sequence as follows:
5600 *
5601 * Clear Advertising
5602 * Stop Discovery
5603 * Disconnect all connections
5604 * hci_dev_close_sync
5605 */
5606static int hci_power_off_sync(struct hci_dev *hdev)
5607{
5608 int err;
5609
5610 /* If controller is already down there is nothing to do */
5611 if (!test_bit(HCI_UP, &hdev->flags))
5612 return 0;
5613
5614 hci_dev_set_flag(hdev, HCI_POWERING_DOWN);
5615
5616 if (test_bit(HCI_ISCAN, &hdev->flags) ||
5617 test_bit(HCI_PSCAN, &hdev->flags)) {
5618 err = hci_write_scan_enable_sync(hdev, val: 0x00);
5619 if (err)
5620 goto out;
5621 }
5622
5623 err = hci_clear_adv_sync(hdev, NULL, force: false);
5624 if (err)
5625 goto out;
5626
5627 err = hci_stop_discovery_sync(hdev);
5628 if (err)
5629 goto out;
5630
5631 /* Terminated due to Power Off */
5632 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5633 if (err)
5634 goto out;
5635
5636 err = hci_dev_close_sync(hdev);
5637
5638out:
5639 hci_dev_clear_flag(hdev, HCI_POWERING_DOWN);
5640 return err;
5641}
5642
5643int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
5644{
5645 if (val)
5646 return hci_power_on_sync(hdev);
5647
5648 return hci_power_off_sync(hdev);
5649}
5650
5651static int hci_write_iac_sync(struct hci_dev *hdev)
5652{
5653 struct hci_cp_write_current_iac_lap cp;
5654
5655 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
5656 return 0;
5657
5658 memset(&cp, 0, sizeof(cp));
5659
5660 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
5661 /* Limited discoverable mode */
5662 cp.num_iac = min_t(u8, hdev->num_iac, 2);
5663 cp.iac_lap[0] = 0x00; /* LIAC */
5664 cp.iac_lap[1] = 0x8b;
5665 cp.iac_lap[2] = 0x9e;
5666 cp.iac_lap[3] = 0x33; /* GIAC */
5667 cp.iac_lap[4] = 0x8b;
5668 cp.iac_lap[5] = 0x9e;
5669 } else {
5670 /* General discoverable mode */
5671 cp.num_iac = 1;
5672 cp.iac_lap[0] = 0x33; /* GIAC */
5673 cp.iac_lap[1] = 0x8b;
5674 cp.iac_lap[2] = 0x9e;
5675 }
5676
5677 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
5678 (cp.num_iac * 3) + 1, &cp,
5679 HCI_CMD_TIMEOUT);
5680}
5681
5682int hci_update_discoverable_sync(struct hci_dev *hdev)
5683{
5684 int err = 0;
5685
5686 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
5687 err = hci_write_iac_sync(hdev);
5688 if (err)
5689 return err;
5690
5691 err = hci_update_scan_sync(hdev);
5692 if (err)
5693 return err;
5694
5695 err = hci_update_class_sync(hdev);
5696 if (err)
5697 return err;
5698 }
5699
5700 /* Advertising instances don't use the global discoverable setting, so
5701 * only update AD if advertising was enabled using Set Advertising.
5702 */
5703 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
5704 err = hci_update_adv_data_sync(hdev, instance: 0x00);
5705 if (err)
5706 return err;
5707
5708 /* Discoverable mode affects the local advertising
5709 * address in limited privacy mode.
5710 */
5711 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
5712 if (ext_adv_capable(hdev))
5713 err = hci_start_ext_adv_sync(hdev, instance: 0x00);
5714 else
5715 err = hci_enable_advertising_sync(hdev);
5716 }
5717 }
5718
5719 return err;
5720}
5721
5722static int update_discoverable_sync(struct hci_dev *hdev, void *data)
5723{
5724 return hci_update_discoverable_sync(hdev);
5725}
5726
5727int hci_update_discoverable(struct hci_dev *hdev)
5728{
5729 /* Only queue if it would have any effect */
5730 if (hdev_is_powered(hdev) &&
5731 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
5732 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
5733 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
5734 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
5735 NULL);
5736
5737 return 0;
5738}
5739
5740int hci_update_connectable_sync(struct hci_dev *hdev)
5741{
5742 int err;
5743
5744 err = hci_update_scan_sync(hdev);
5745 if (err)
5746 return err;
5747
5748 /* If BR/EDR is not enabled and we disable advertising as a
5749 * by-product of disabling connectable, we need to update the
5750 * advertising flags.
5751 */
5752 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5753 err = hci_update_adv_data_sync(hdev, instance: hdev->cur_adv_instance);
5754
5755 /* Update the advertising parameters if necessary */
5756 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
5757 !list_empty(head: &hdev->adv_instances)) {
5758 if (ext_adv_capable(hdev))
5759 err = hci_start_ext_adv_sync(hdev,
5760 instance: hdev->cur_adv_instance);
5761 else
5762 err = hci_enable_advertising_sync(hdev);
5763
5764 if (err)
5765 return err;
5766 }
5767
5768 return hci_update_passive_scan_sync(hdev);
5769}
5770
5771static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
5772{
5773 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
5774 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
5775 struct hci_cp_inquiry cp;
5776
5777 bt_dev_dbg(hdev, "");
5778
5779 if (test_bit(HCI_INQUIRY, &hdev->flags))
5780 return 0;
5781
5782 hci_dev_lock(hdev);
5783 hci_inquiry_cache_flush(hdev);
5784 hci_dev_unlock(hdev);
5785
5786 memset(&cp, 0, sizeof(cp));
5787
5788 if (hdev->discovery.limited)
5789 memcpy(&cp.lap, liac, sizeof(cp.lap));
5790 else
5791 memcpy(&cp.lap, giac, sizeof(cp.lap));
5792
5793 cp.length = length;
5794
5795 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
5796 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5797}
5798
5799static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
5800{
5801 u8 own_addr_type;
5802 /* Accept list is not used for discovery */
5803 u8 filter_policy = 0x00;
5804 /* Default is to enable duplicates filter */
5805 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
5806 int err;
5807
5808 bt_dev_dbg(hdev, "");
5809
5810 /* If controller is scanning, it means the passive scanning is
5811 * running. Thus, we should temporarily stop it in order to set the
5812 * discovery scanning parameters.
5813 */
5814 err = hci_scan_disable_sync(hdev);
5815 if (err) {
5816 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
5817 return err;
5818 }
5819
5820 cancel_interleave_scan(hdev);
5821
5822 /* Pause address resolution for active scan and stop advertising if
5823 * privacy is enabled.
5824 */
5825 err = hci_pause_addr_resolution(hdev);
5826 if (err)
5827 goto failed;
5828
5829 /* All active scans will be done with either a resolvable private
5830 * address (when privacy feature has been enabled) or non-resolvable
5831 * private address.
5832 */
5833 err = hci_update_random_address_sync(hdev, require_privacy: true, rpa: scan_use_rpa(hdev),
5834 own_addr_type: &own_addr_type);
5835 if (err < 0)
5836 own_addr_type = ADDR_LE_DEV_PUBLIC;
5837
5838 if (hci_is_adv_monitoring(hdev) ||
5839 (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
5840 hdev->discovery.result_filtering)) {
5841 /* Duplicate filter should be disabled when some advertisement
5842 * monitor is activated, otherwise AdvMon can only receive one
5843 * advertisement for one peer(*) during active scanning, and
5844 * might report loss to these peers.
5845 *
5846 * If controller does strict duplicate filtering and the
5847 * discovery requires result filtering disables controller based
5848 * filtering since that can cause reports that would match the
5849 * host filter to not be reported.
5850 */
5851 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
5852 }
5853
5854 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
5855 window: hdev->le_scan_window_discovery,
5856 own_addr_type, filter_policy, filter_dup);
5857 if (!err)
5858 return err;
5859
5860failed:
5861 /* Resume advertising if it was paused */
5862 if (use_ll_privacy(hdev))
5863 hci_resume_advertising_sync(hdev);
5864
5865 /* Resume passive scanning */
5866 hci_update_passive_scan_sync(hdev);
5867 return err;
5868}
5869
5870static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
5871{
5872 int err;
5873
5874 bt_dev_dbg(hdev, "");
5875
5876 err = hci_active_scan_sync(hdev, interval: hdev->le_scan_int_discovery * 2);
5877 if (err)
5878 return err;
5879
5880 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5881}
5882
5883int hci_start_discovery_sync(struct hci_dev *hdev)
5884{
5885 unsigned long timeout;
5886 int err;
5887
5888 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
5889
5890 switch (hdev->discovery.type) {
5891 case DISCOV_TYPE_BREDR:
5892 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5893 case DISCOV_TYPE_INTERLEAVED:
5894 /* When running simultaneous discovery, the LE scanning time
5895 * should occupy the whole discovery time sine BR/EDR inquiry
5896 * and LE scanning are scheduled by the controller.
5897 *
5898 * For interleaving discovery in comparison, BR/EDR inquiry
5899 * and LE scanning are done sequentially with separate
5900 * timeouts.
5901 */
5902 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
5903 &hdev->quirks)) {
5904 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5905 /* During simultaneous discovery, we double LE scan
5906 * interval. We must leave some time for the controller
5907 * to do BR/EDR inquiry.
5908 */
5909 err = hci_start_interleaved_discovery_sync(hdev);
5910 break;
5911 }
5912
5913 timeout = msecs_to_jiffies(m: hdev->discov_interleaved_timeout);
5914 err = hci_active_scan_sync(hdev, interval: hdev->le_scan_int_discovery);
5915 break;
5916 case DISCOV_TYPE_LE:
5917 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5918 err = hci_active_scan_sync(hdev, interval: hdev->le_scan_int_discovery);
5919 break;
5920 default:
5921 return -EINVAL;
5922 }
5923
5924 if (err)
5925 return err;
5926
5927 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
5928
5929 queue_delayed_work(wq: hdev->req_workqueue, dwork: &hdev->le_scan_disable,
5930 delay: timeout);
5931 return 0;
5932}
5933
5934static void hci_suspend_monitor_sync(struct hci_dev *hdev)
5935{
5936 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5937 case HCI_ADV_MONITOR_EXT_MSFT:
5938 msft_suspend_sync(hdev);
5939 break;
5940 default:
5941 return;
5942 }
5943}
5944
5945/* This function disables discovery and mark it as paused */
5946static int hci_pause_discovery_sync(struct hci_dev *hdev)
5947{
5948 int old_state = hdev->discovery.state;
5949 int err;
5950
5951 /* If discovery already stopped/stopping/paused there nothing to do */
5952 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
5953 hdev->discovery_paused)
5954 return 0;
5955
5956 hci_discovery_set_state(hdev, state: DISCOVERY_STOPPING);
5957 err = hci_stop_discovery_sync(hdev);
5958 if (err)
5959 return err;
5960
5961 hdev->discovery_paused = true;
5962 hdev->discovery_old_state = old_state;
5963 hci_discovery_set_state(hdev, state: DISCOVERY_STOPPED);
5964
5965 return 0;
5966}
5967
5968static int hci_update_event_filter_sync(struct hci_dev *hdev)
5969{
5970 struct bdaddr_list_with_flags *b;
5971 u8 scan = SCAN_DISABLED;
5972 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
5973 int err;
5974
5975 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5976 return 0;
5977
5978 /* Some fake CSR controllers lock up after setting this type of
5979 * filter, so avoid sending the request altogether.
5980 */
5981 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
5982 return 0;
5983
5984 /* Always clear event filter when starting */
5985 hci_clear_event_filter_sync(hdev);
5986
5987 list_for_each_entry(b, &hdev->accept_list, list) {
5988 if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
5989 continue;
5990
5991 bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
5992
5993 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
5994 HCI_CONN_SETUP_ALLOW_BDADDR,
5995 bdaddr: &b->bdaddr,
5996 HCI_CONN_SETUP_AUTO_ON);
5997 if (err)
5998 bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
5999 &b->bdaddr);
6000 else
6001 scan = SCAN_PAGE;
6002 }
6003
6004 if (scan && !scanning)
6005 hci_write_scan_enable_sync(hdev, val: scan);
6006 else if (!scan && scanning)
6007 hci_write_scan_enable_sync(hdev, val: scan);
6008
6009 return 0;
6010}
6011
6012/* This function disables scan (BR and LE) and mark it as paused */
6013static int hci_pause_scan_sync(struct hci_dev *hdev)
6014{
6015 if (hdev->scanning_paused)
6016 return 0;
6017
6018 /* Disable page scan if enabled */
6019 if (test_bit(HCI_PSCAN, &hdev->flags))
6020 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
6021
6022 hci_scan_disable_sync(hdev);
6023
6024 hdev->scanning_paused = true;
6025
6026 return 0;
6027}
6028
6029/* This function performs the HCI suspend procedures in the follow order:
6030 *
6031 * Pause discovery (active scanning/inquiry)
6032 * Pause Directed Advertising/Advertising
6033 * Pause Scanning (passive scanning in case discovery was not active)
6034 * Disconnect all connections
6035 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
6036 * otherwise:
6037 * Update event mask (only set events that are allowed to wake up the host)
6038 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
6039 * Update passive scanning (lower duty cycle)
6040 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
6041 */
6042int hci_suspend_sync(struct hci_dev *hdev)
6043{
6044 int err;
6045
6046 /* If marked as suspended there nothing to do */
6047 if (hdev->suspended)
6048 return 0;
6049
6050 /* Mark device as suspended */
6051 hdev->suspended = true;
6052
6053 /* Pause discovery if not already stopped */
6054 hci_pause_discovery_sync(hdev);
6055
6056 /* Pause other advertisements */
6057 hci_pause_advertising_sync(hdev);
6058
6059 /* Suspend monitor filters */
6060 hci_suspend_monitor_sync(hdev);
6061
6062 /* Prevent disconnects from causing scanning to be re-enabled */
6063 hci_pause_scan_sync(hdev);
6064
6065 if (hci_conn_count(hdev)) {
6066 /* Soft disconnect everything (power off) */
6067 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
6068 if (err) {
6069 /* Set state to BT_RUNNING so resume doesn't notify */
6070 hdev->suspend_state = BT_RUNNING;
6071 hci_resume_sync(hdev);
6072 return err;
6073 }
6074
6075 /* Update event mask so only the allowed event can wakeup the
6076 * host.
6077 */
6078 hci_set_event_mask_sync(hdev);
6079 }
6080
6081 /* Only configure accept list if disconnect succeeded and wake
6082 * isn't being prevented.
6083 */
6084 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
6085 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
6086 return 0;
6087 }
6088
6089 /* Unpause to take care of updating scanning params */
6090 hdev->scanning_paused = false;
6091
6092 /* Enable event filter for paired devices */
6093 hci_update_event_filter_sync(hdev);
6094
6095 /* Update LE passive scan if enabled */
6096 hci_update_passive_scan_sync(hdev);
6097
6098 /* Pause scan changes again. */
6099 hdev->scanning_paused = true;
6100
6101 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
6102
6103 return 0;
6104}
6105
6106/* This function resumes discovery */
6107static int hci_resume_discovery_sync(struct hci_dev *hdev)
6108{
6109 int err;
6110
6111 /* If discovery not paused there nothing to do */
6112 if (!hdev->discovery_paused)
6113 return 0;
6114
6115 hdev->discovery_paused = false;
6116
6117 hci_discovery_set_state(hdev, state: DISCOVERY_STARTING);
6118
6119 err = hci_start_discovery_sync(hdev);
6120
6121 hci_discovery_set_state(hdev, state: err ? DISCOVERY_STOPPED :
6122 DISCOVERY_FINDING);
6123
6124 return err;
6125}
6126
6127static void hci_resume_monitor_sync(struct hci_dev *hdev)
6128{
6129 switch (hci_get_adv_monitor_offload_ext(hdev)) {
6130 case HCI_ADV_MONITOR_EXT_MSFT:
6131 msft_resume_sync(hdev);
6132 break;
6133 default:
6134 return;
6135 }
6136}
6137
6138/* This function resume scan and reset paused flag */
6139static int hci_resume_scan_sync(struct hci_dev *hdev)
6140{
6141 if (!hdev->scanning_paused)
6142 return 0;
6143
6144 hdev->scanning_paused = false;
6145
6146 hci_update_scan_sync(hdev);
6147
6148 /* Reset passive scanning to normal */
6149 hci_update_passive_scan_sync(hdev);
6150
6151 return 0;
6152}
6153
6154/* This function performs the HCI suspend procedures in the follow order:
6155 *
6156 * Restore event mask
6157 * Clear event filter
6158 * Update passive scanning (normal duty cycle)
6159 * Resume Directed Advertising/Advertising
6160 * Resume discovery (active scanning/inquiry)
6161 */
6162int hci_resume_sync(struct hci_dev *hdev)
6163{
6164 /* If not marked as suspended there nothing to do */
6165 if (!hdev->suspended)
6166 return 0;
6167
6168 hdev->suspended = false;
6169
6170 /* Restore event mask */
6171 hci_set_event_mask_sync(hdev);
6172
6173 /* Clear any event filters and restore scan state */
6174 hci_clear_event_filter_sync(hdev);
6175
6176 /* Resume scanning */
6177 hci_resume_scan_sync(hdev);
6178
6179 /* Resume monitor filters */
6180 hci_resume_monitor_sync(hdev);
6181
6182 /* Resume other advertisements */
6183 hci_resume_advertising_sync(hdev);
6184
6185 /* Resume discovery */
6186 hci_resume_discovery_sync(hdev);
6187
6188 return 0;
6189}
6190
6191static bool conn_use_rpa(struct hci_conn *conn)
6192{
6193 struct hci_dev *hdev = conn->hdev;
6194
6195 return hci_dev_test_flag(hdev, HCI_PRIVACY);
6196}
6197
6198static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
6199 struct hci_conn *conn)
6200{
6201 struct hci_cp_le_set_ext_adv_params cp;
6202 int err;
6203 bdaddr_t random_addr;
6204 u8 own_addr_type;
6205
6206 err = hci_update_random_address_sync(hdev, require_privacy: false, rpa: conn_use_rpa(conn),
6207 own_addr_type: &own_addr_type);
6208 if (err)
6209 return err;
6210
6211 /* Set require_privacy to false so that the remote device has a
6212 * chance of identifying us.
6213 */
6214 err = hci_get_random_address(hdev, require_privacy: false, use_rpa: conn_use_rpa(conn), NULL,
6215 own_addr_type: &own_addr_type, rand_addr: &random_addr);
6216 if (err)
6217 return err;
6218
6219 memset(&cp, 0, sizeof(cp));
6220
6221 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
6222 cp.channel_map = hdev->le_adv_channel_map;
6223 cp.tx_power = HCI_TX_POWER_INVALID;
6224 cp.primary_phy = HCI_ADV_PHY_1M;
6225 cp.secondary_phy = HCI_ADV_PHY_1M;
6226 cp.handle = 0x00; /* Use instance 0 for directed adv */
6227 cp.own_addr_type = own_addr_type;
6228 cp.peer_addr_type = conn->dst_type;
6229 bacpy(dst: &cp.peer_addr, src: &conn->dst);
6230
6231 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
6232 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
6233 * does not supports advertising data when the advertising set already
6234 * contains some, the controller shall return erroc code 'Invalid
6235 * HCI Command Parameters(0x12).
6236 * So it is required to remove adv set for handle 0x00. since we use
6237 * instance 0 for directed adv.
6238 */
6239 err = hci_remove_ext_adv_instance_sync(hdev, instance: cp.handle, NULL);
6240 if (err)
6241 return err;
6242
6243 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
6244 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6245 if (err)
6246 return err;
6247
6248 /* Check if random address need to be updated */
6249 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
6250 bacmp(ba1: &random_addr, BDADDR_ANY) &&
6251 bacmp(ba1: &random_addr, ba2: &hdev->random_addr)) {
6252 err = hci_set_adv_set_random_addr_sync(hdev, instance: 0x00,
6253 random_addr: &random_addr);
6254 if (err)
6255 return err;
6256 }
6257
6258 return hci_enable_ext_advertising_sync(hdev, instance: 0x00);
6259}
6260
6261static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
6262 struct hci_conn *conn)
6263{
6264 struct hci_cp_le_set_adv_param cp;
6265 u8 status;
6266 u8 own_addr_type;
6267 u8 enable;
6268
6269 if (ext_adv_capable(hdev))
6270 return hci_le_ext_directed_advertising_sync(hdev, conn);
6271
6272 /* Clear the HCI_LE_ADV bit temporarily so that the
6273 * hci_update_random_address knows that it's safe to go ahead
6274 * and write a new random address. The flag will be set back on
6275 * as soon as the SET_ADV_ENABLE HCI command completes.
6276 */
6277 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6278
6279 /* Set require_privacy to false so that the remote device has a
6280 * chance of identifying us.
6281 */
6282 status = hci_update_random_address_sync(hdev, require_privacy: false, rpa: conn_use_rpa(conn),
6283 own_addr_type: &own_addr_type);
6284 if (status)
6285 return status;
6286
6287 memset(&cp, 0, sizeof(cp));
6288
6289 /* Some controllers might reject command if intervals are not
6290 * within range for undirected advertising.
6291 * BCM20702A0 is known to be affected by this.
6292 */
6293 cp.min_interval = cpu_to_le16(0x0020);
6294 cp.max_interval = cpu_to_le16(0x0020);
6295
6296 cp.type = LE_ADV_DIRECT_IND;
6297 cp.own_address_type = own_addr_type;
6298 cp.direct_addr_type = conn->dst_type;
6299 bacpy(dst: &cp.direct_addr, src: &conn->dst);
6300 cp.channel_map = hdev->le_adv_channel_map;
6301
6302 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
6303 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6304 if (status)
6305 return status;
6306
6307 enable = 0x01;
6308
6309 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
6310 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
6311}
6312
6313static void set_ext_conn_params(struct hci_conn *conn,
6314 struct hci_cp_le_ext_conn_param *p)
6315{
6316 struct hci_dev *hdev = conn->hdev;
6317
6318 memset(p, 0, sizeof(*p));
6319
6320 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6321 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6322 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6323 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6324 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
6325 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6326 p->min_ce_len = cpu_to_le16(0x0000);
6327 p->max_ce_len = cpu_to_le16(0x0000);
6328}
6329
6330static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
6331 struct hci_conn *conn, u8 own_addr_type)
6332{
6333 struct hci_cp_le_ext_create_conn *cp;
6334 struct hci_cp_le_ext_conn_param *p;
6335 u8 data[sizeof(*cp) + sizeof(*p) * 3];
6336 u32 plen;
6337
6338 cp = (void *)data;
6339 p = (void *)cp->data;
6340
6341 memset(cp, 0, sizeof(*cp));
6342
6343 bacpy(dst: &cp->peer_addr, src: &conn->dst);
6344 cp->peer_addr_type = conn->dst_type;
6345 cp->own_addr_type = own_addr_type;
6346
6347 plen = sizeof(*cp);
6348
6349 if (scan_1m(hdev)) {
6350 cp->phys |= LE_SCAN_PHY_1M;
6351 set_ext_conn_params(conn, p);
6352
6353 p++;
6354 plen += sizeof(*p);
6355 }
6356
6357 if (scan_2m(hdev)) {
6358 cp->phys |= LE_SCAN_PHY_2M;
6359 set_ext_conn_params(conn, p);
6360
6361 p++;
6362 plen += sizeof(*p);
6363 }
6364
6365 if (scan_coded(hdev)) {
6366 cp->phys |= LE_SCAN_PHY_CODED;
6367 set_ext_conn_params(conn, p);
6368
6369 plen += sizeof(*p);
6370 }
6371
6372 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
6373 plen, data,
6374 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
6375 conn->conn_timeout, NULL);
6376}
6377
6378static int hci_le_create_conn_sync(struct hci_dev *hdev, void *data)
6379{
6380 struct hci_cp_le_create_conn cp;
6381 struct hci_conn_params *params;
6382 u8 own_addr_type;
6383 int err;
6384 struct hci_conn *conn = data;
6385
6386 if (!hci_conn_valid(hdev, conn))
6387 return -ECANCELED;
6388
6389 bt_dev_dbg(hdev, "conn %p", conn);
6390
6391 clear_bit(nr: HCI_CONN_SCANNING, addr: &conn->flags);
6392 conn->state = BT_CONNECT;
6393
6394 /* If requested to connect as peripheral use directed advertising */
6395 if (conn->role == HCI_ROLE_SLAVE) {
6396 /* If we're active scanning and simultaneous roles is not
6397 * enabled simply reject the attempt.
6398 */
6399 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
6400 hdev->le_scan_type == LE_SCAN_ACTIVE &&
6401 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
6402 hci_conn_del(conn);
6403 return -EBUSY;
6404 }
6405
6406 /* Pause advertising while doing directed advertising. */
6407 hci_pause_advertising_sync(hdev);
6408
6409 err = hci_le_directed_advertising_sync(hdev, conn);
6410 goto done;
6411 }
6412
6413 /* Disable advertising if simultaneous roles is not in use. */
6414 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
6415 hci_pause_advertising_sync(hdev);
6416
6417 params = hci_conn_params_lookup(hdev, addr: &conn->dst, addr_type: conn->dst_type);
6418 if (params) {
6419 conn->le_conn_min_interval = params->conn_min_interval;
6420 conn->le_conn_max_interval = params->conn_max_interval;
6421 conn->le_conn_latency = params->conn_latency;
6422 conn->le_supv_timeout = params->supervision_timeout;
6423 } else {
6424 conn->le_conn_min_interval = hdev->le_conn_min_interval;
6425 conn->le_conn_max_interval = hdev->le_conn_max_interval;
6426 conn->le_conn_latency = hdev->le_conn_latency;
6427 conn->le_supv_timeout = hdev->le_supv_timeout;
6428 }
6429
6430 /* If controller is scanning, we stop it since some controllers are
6431 * not able to scan and connect at the same time. Also set the
6432 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
6433 * handler for scan disabling knows to set the correct discovery
6434 * state.
6435 */
6436 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
6437 hci_scan_disable_sync(hdev);
6438 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
6439 }
6440
6441 /* Update random address, but set require_privacy to false so
6442 * that we never connect with an non-resolvable address.
6443 */
6444 err = hci_update_random_address_sync(hdev, require_privacy: false, rpa: conn_use_rpa(conn),
6445 own_addr_type: &own_addr_type);
6446 if (err)
6447 goto done;
6448
6449 if (use_ext_conn(hdev)) {
6450 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
6451 goto done;
6452 }
6453
6454 memset(&cp, 0, sizeof(cp));
6455
6456 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6457 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6458
6459 bacpy(dst: &cp.peer_addr, src: &conn->dst);
6460 cp.peer_addr_type = conn->dst_type;
6461 cp.own_address_type = own_addr_type;
6462 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6463 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6464 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
6465 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6466 cp.min_ce_len = cpu_to_le16(0x0000);
6467 cp.max_ce_len = cpu_to_le16(0x0000);
6468
6469 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
6470 *
6471 * If this event is unmasked and the HCI_LE_Connection_Complete event
6472 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
6473 * sent when a new connection has been created.
6474 */
6475 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
6476 sizeof(cp), &cp,
6477 use_enhanced_conn_complete(hdev) ?
6478 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
6479 HCI_EV_LE_CONN_COMPLETE,
6480 conn->conn_timeout, NULL);
6481
6482done:
6483 if (err == -ETIMEDOUT)
6484 hci_le_connect_cancel_sync(hdev, conn, reason: 0x00);
6485
6486 /* Re-enable advertising after the connection attempt is finished. */
6487 hci_resume_advertising_sync(hdev);
6488 return err;
6489}
6490
6491int hci_le_create_cis_sync(struct hci_dev *hdev)
6492{
6493 struct {
6494 struct hci_cp_le_create_cis cp;
6495 struct hci_cis cis[0x1f];
6496 } cmd;
6497 struct hci_conn *conn;
6498 u8 cig = BT_ISO_QOS_CIG_UNSET;
6499
6500 /* The spec allows only one pending LE Create CIS command at a time. If
6501 * the command is pending now, don't do anything. We check for pending
6502 * connections after each CIS Established event.
6503 *
6504 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6505 * page 2566:
6506 *
6507 * If the Host issues this command before all the
6508 * HCI_LE_CIS_Established events from the previous use of the
6509 * command have been generated, the Controller shall return the
6510 * error code Command Disallowed (0x0C).
6511 *
6512 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6513 * page 2567:
6514 *
6515 * When the Controller receives the HCI_LE_Create_CIS command, the
6516 * Controller sends the HCI_Command_Status event to the Host. An
6517 * HCI_LE_CIS_Established event will be generated for each CIS when it
6518 * is established or if it is disconnected or considered lost before
6519 * being established; until all the events are generated, the command
6520 * remains pending.
6521 */
6522
6523 memset(&cmd, 0, sizeof(cmd));
6524
6525 hci_dev_lock(hdev);
6526
6527 rcu_read_lock();
6528
6529 /* Wait until previous Create CIS has completed */
6530 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6531 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
6532 goto done;
6533 }
6534
6535 /* Find CIG with all CIS ready */
6536 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6537 struct hci_conn *link;
6538
6539 if (hci_conn_check_create_cis(conn))
6540 continue;
6541
6542 cig = conn->iso_qos.ucast.cig;
6543
6544 list_for_each_entry_rcu(link, &hdev->conn_hash.list, list) {
6545 if (hci_conn_check_create_cis(conn: link) > 0 &&
6546 link->iso_qos.ucast.cig == cig &&
6547 link->state != BT_CONNECTED) {
6548 cig = BT_ISO_QOS_CIG_UNSET;
6549 break;
6550 }
6551 }
6552
6553 if (cig != BT_ISO_QOS_CIG_UNSET)
6554 break;
6555 }
6556
6557 if (cig == BT_ISO_QOS_CIG_UNSET)
6558 goto done;
6559
6560 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6561 struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis];
6562
6563 if (hci_conn_check_create_cis(conn) ||
6564 conn->iso_qos.ucast.cig != cig)
6565 continue;
6566
6567 set_bit(nr: HCI_CONN_CREATE_CIS, addr: &conn->flags);
6568 cis->acl_handle = cpu_to_le16(conn->parent->handle);
6569 cis->cis_handle = cpu_to_le16(conn->handle);
6570 cmd.cp.num_cis++;
6571
6572 if (cmd.cp.num_cis >= ARRAY_SIZE(cmd.cis))
6573 break;
6574 }
6575
6576done:
6577 rcu_read_unlock();
6578
6579 hci_dev_unlock(hdev);
6580
6581 if (!cmd.cp.num_cis)
6582 return 0;
6583
6584 /* Wait for HCI_LE_CIS_Established */
6585 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CIS,
6586 sizeof(cmd.cp) + sizeof(cmd.cis[0]) *
6587 cmd.cp.num_cis, &cmd,
6588 HCI_EVT_LE_CIS_ESTABLISHED,
6589 conn->conn_timeout, NULL);
6590}
6591
6592int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle)
6593{
6594 struct hci_cp_le_remove_cig cp;
6595
6596 memset(&cp, 0, sizeof(cp));
6597 cp.cig_id = handle;
6598
6599 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp),
6600 &cp, HCI_CMD_TIMEOUT);
6601}
6602
6603int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle)
6604{
6605 struct hci_cp_le_big_term_sync cp;
6606
6607 memset(&cp, 0, sizeof(cp));
6608 cp.handle = handle;
6609
6610 return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC,
6611 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6612}
6613
6614int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
6615{
6616 struct hci_cp_le_pa_term_sync cp;
6617
6618 memset(&cp, 0, sizeof(cp));
6619 cp.handle = cpu_to_le16(handle);
6620
6621 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
6622 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6623}
6624
6625int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
6626 bool use_rpa, struct adv_info *adv_instance,
6627 u8 *own_addr_type, bdaddr_t *rand_addr)
6628{
6629 int err;
6630
6631 bacpy(dst: rand_addr, BDADDR_ANY);
6632
6633 /* If privacy is enabled use a resolvable private address. If
6634 * current RPA has expired then generate a new one.
6635 */
6636 if (use_rpa) {
6637 /* If Controller supports LL Privacy use own address type is
6638 * 0x03
6639 */
6640 if (use_ll_privacy(hdev))
6641 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
6642 else
6643 *own_addr_type = ADDR_LE_DEV_RANDOM;
6644
6645 if (adv_instance) {
6646 if (adv_rpa_valid(adv_instance))
6647 return 0;
6648 } else {
6649 if (rpa_valid(hdev))
6650 return 0;
6651 }
6652
6653 err = smp_generate_rpa(hdev, irk: hdev->irk, rpa: &hdev->rpa);
6654 if (err < 0) {
6655 bt_dev_err(hdev, "failed to generate new RPA");
6656 return err;
6657 }
6658
6659 bacpy(dst: rand_addr, src: &hdev->rpa);
6660
6661 return 0;
6662 }
6663
6664 /* In case of required privacy without resolvable private address,
6665 * use an non-resolvable private address. This is useful for
6666 * non-connectable advertising.
6667 */
6668 if (require_privacy) {
6669 bdaddr_t nrpa;
6670
6671 while (true) {
6672 /* The non-resolvable private address is generated
6673 * from random six bytes with the two most significant
6674 * bits cleared.
6675 */
6676 get_random_bytes(buf: &nrpa, len: 6);
6677 nrpa.b[5] &= 0x3f;
6678
6679 /* The non-resolvable private address shall not be
6680 * equal to the public address.
6681 */
6682 if (bacmp(ba1: &hdev->bdaddr, ba2: &nrpa))
6683 break;
6684 }
6685
6686 *own_addr_type = ADDR_LE_DEV_RANDOM;
6687 bacpy(dst: rand_addr, src: &nrpa);
6688
6689 return 0;
6690 }
6691
6692 /* No privacy so use a public address. */
6693 *own_addr_type = ADDR_LE_DEV_PUBLIC;
6694
6695 return 0;
6696}
6697
6698static int _update_adv_data_sync(struct hci_dev *hdev, void *data)
6699{
6700 u8 instance = PTR_UINT(data);
6701
6702 return hci_update_adv_data_sync(hdev, instance);
6703}
6704
6705int hci_update_adv_data(struct hci_dev *hdev, u8 instance)
6706{
6707 return hci_cmd_sync_queue(hdev, _update_adv_data_sync,
6708 UINT_PTR(instance), NULL);
6709}
6710
6711static int hci_acl_create_conn_sync(struct hci_dev *hdev, void *data)
6712{
6713 struct hci_conn *conn = data;
6714 struct inquiry_entry *ie;
6715 struct hci_cp_create_conn cp;
6716 int err;
6717
6718 if (!hci_conn_valid(hdev, conn))
6719 return -ECANCELED;
6720
6721 /* Many controllers disallow HCI Create Connection while it is doing
6722 * HCI Inquiry. So we cancel the Inquiry first before issuing HCI Create
6723 * Connection. This may cause the MGMT discovering state to become false
6724 * without user space's request but it is okay since the MGMT Discovery
6725 * APIs do not promise that discovery should be done forever. Instead,
6726 * the user space monitors the status of MGMT discovering and it may
6727 * request for discovery again when this flag becomes false.
6728 */
6729 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
6730 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL, 0,
6731 NULL, HCI_CMD_TIMEOUT);
6732 if (err)
6733 bt_dev_warn(hdev, "Failed to cancel inquiry %d", err);
6734 }
6735
6736 conn->state = BT_CONNECT;
6737 conn->out = true;
6738 conn->role = HCI_ROLE_MASTER;
6739
6740 conn->attempt++;
6741
6742 conn->link_policy = hdev->link_policy;
6743
6744 memset(&cp, 0, sizeof(cp));
6745 bacpy(dst: &cp.bdaddr, src: &conn->dst);
6746 cp.pscan_rep_mode = 0x02;
6747
6748 ie = hci_inquiry_cache_lookup(hdev, bdaddr: &conn->dst);
6749 if (ie) {
6750 if (inquiry_entry_age(e: ie) <= INQUIRY_ENTRY_AGE_MAX) {
6751 cp.pscan_rep_mode = ie->data.pscan_rep_mode;
6752 cp.pscan_mode = ie->data.pscan_mode;
6753 cp.clock_offset = ie->data.clock_offset |
6754 cpu_to_le16(0x8000);
6755 }
6756
6757 memcpy(conn->dev_class, ie->data.dev_class, 3);
6758 }
6759
6760 cp.pkt_type = cpu_to_le16(conn->pkt_type);
6761 if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
6762 cp.role_switch = 0x01;
6763 else
6764 cp.role_switch = 0x00;
6765
6766 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN,
6767 sizeof(cp), &cp,
6768 HCI_EV_CONN_COMPLETE,
6769 conn->conn_timeout, NULL);
6770}
6771
6772int hci_connect_acl_sync(struct hci_dev *hdev, struct hci_conn *conn)
6773{
6774 return hci_cmd_sync_queue_once(hdev, hci_acl_create_conn_sync, conn,
6775 NULL);
6776}
6777
6778static void create_le_conn_complete(struct hci_dev *hdev, void *data, int err)
6779{
6780 struct hci_conn *conn = data;
6781
6782 bt_dev_dbg(hdev, "err %d", err);
6783
6784 if (err == -ECANCELED)
6785 return;
6786
6787 hci_dev_lock(hdev);
6788
6789 if (!hci_conn_valid(hdev, conn))
6790 goto done;
6791
6792 if (!err) {
6793 hci_connect_le_scan_cleanup(conn, status: 0x00);
6794 goto done;
6795 }
6796
6797 /* Check if connection is still pending */
6798 if (conn != hci_lookup_le_connect(hdev))
6799 goto done;
6800
6801 /* Flush to make sure we send create conn cancel command if needed */
6802 flush_delayed_work(dwork: &conn->le_conn_timeout);
6803 hci_conn_failed(conn, status: bt_status(err));
6804
6805done:
6806 hci_dev_unlock(hdev);
6807}
6808
6809int hci_connect_le_sync(struct hci_dev *hdev, struct hci_conn *conn)
6810{
6811 return hci_cmd_sync_queue_once(hdev, hci_le_create_conn_sync, conn,
6812 create_le_conn_complete);
6813}
6814
6815int hci_cancel_connect_sync(struct hci_dev *hdev, struct hci_conn *conn)
6816{
6817 if (conn->state != BT_OPEN)
6818 return -EINVAL;
6819
6820 switch (conn->type) {
6821 case ACL_LINK:
6822 return !hci_cmd_sync_dequeue_once(hdev,
6823 hci_acl_create_conn_sync,
6824 conn, NULL);
6825 case LE_LINK:
6826 return !hci_cmd_sync_dequeue_once(hdev, hci_le_create_conn_sync,
6827 conn, create_le_conn_complete);
6828 }
6829
6830 return -ENOENT;
6831}
6832

source code of linux/net/bluetooth/hci_sync.c