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Bluetooth: hci_sync: Fix handling of HCI_OP_CREATE_CONN_CANCEL
[linux-block.git] / net / bluetooth / hci_sync.c
CommitLineData
6a98e383
MH		 1// SPDX-License-Identifier: GPL-2.0
2/*
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2021 Intel Corporation
6a42e9bf 6 * Copyright 2023 NXP
6a98e383
MH		 7 */
8
d0b13706
LAD		 9#include <linux/property.h>
10
6a98e383
MH		 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"
828cea2b 16#include "hci_codec.h"
d0b13706 17#include "hci_debugfs.h"
6a98e383 18#include "smp.h"
161510cc 19#include "eir.h"
d0b13706
LAD		 20#include "msft.h"
21#include "aosp.h"
22#include "leds.h"
6a98e383
MH		 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
cba6b758
LAD		 35 if (skb) {
36 struct sock *sk = hci_skb_sk(skb);
37
38 /* Drop sk reference if set */
39 if (sk)
40 sock_put(sk);
41
42 hdev->req_skb = skb_get(skb);
43 }
44
6a98e383
MH		 45 wake_up_interruptible(&hdev->req_wait_q);
46}
47
48static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode,
49 u32 plen, const void *param,
50 struct sock *sk)
51{
52 int len = HCI_COMMAND_HDR_SIZE + plen;
53 struct hci_command_hdr *hdr;
54 struct sk_buff *skb;
55
56 skb = bt_skb_alloc(len, GFP_ATOMIC);
57 if (!skb)
58 return NULL;
59
60 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
61 hdr->opcode = cpu_to_le16(opcode);
62 hdr->plen = plen;
63
64 if (plen)
65 skb_put_data(skb, param, plen);
66
67 bt_dev_dbg(hdev, "skb len %d", skb->len);
68
69 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
70 hci_skb_opcode(skb) = opcode;
71
cba6b758
LAD		 72 /* Grab a reference if command needs to be associated with a sock (e.g.
73 * likely mgmt socket that initiated the command).
74 */
75 if (sk) {
76 hci_skb_sk(skb) = sk;
77 sock_hold(sk);
78 }
79
6a98e383
MH		 80 return skb;
81}
82
83static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
84 const void *param, u8 event, struct sock *sk)
85{
86 struct hci_dev *hdev = req->hdev;
87 struct sk_buff *skb;
88
89 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
90
91 /* If an error occurred during request building, there is no point in
92 * queueing the HCI command. We can simply return.
93 */
94 if (req->err)
95 return;
96
97 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
98 if (!skb) {
99 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
100 opcode);
101 req->err = -ENOMEM;
102 return;
103 }
104
105 if (skb_queue_empty(&req->cmd_q))
106 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
107
85b56857 108 hci_skb_event(skb) = event;
6a98e383
MH		 109
110 skb_queue_tail(&req->cmd_q, skb);
111}
112
113static int hci_cmd_sync_run(struct hci_request *req)
114{
115 struct hci_dev *hdev = req->hdev;
116 struct sk_buff *skb;
117 unsigned long flags;
118
119 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
120
121 /* If an error occurred during request building, remove all HCI
122 * commands queued on the HCI request queue.
123 */
124 if (req->err) {
125 skb_queue_purge(&req->cmd_q);
126 return req->err;
127 }
128
129 /* Do not allow empty requests */
130 if (skb_queue_empty(&req->cmd_q))
131 return -ENODATA;
132
133 skb = skb_peek_tail(&req->cmd_q);
134 bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
135 bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
136
137 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
138 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
139 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
140
141 queue_work(hdev->workqueue, &hdev->cmd_work);
142
143 return 0;
144}
145
146/* This function requires the caller holds hdev->req_lock. */
147struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
148 const void *param, u8 event, u32 timeout,
149 struct sock *sk)
150{
151 struct hci_request req;
152 struct sk_buff *skb;
153 int err = 0;
154
d0b13706 155 bt_dev_dbg(hdev, "Opcode 0x%4x", opcode);
6a98e383
MH		 156
157 hci_req_init(&req, hdev);
158
159 hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
160
161 hdev->req_status = HCI_REQ_PEND;
162
163 err = hci_cmd_sync_run(&req);
164 if (err < 0)
165 return ERR_PTR(err);
166
167 err = wait_event_interruptible_timeout(hdev->req_wait_q,
168 hdev->req_status != HCI_REQ_PEND,
169 timeout);
170
171 if (err == -ERESTARTSYS)
172 return ERR_PTR(-EINTR);
173
174 switch (hdev->req_status) {
175 case HCI_REQ_DONE:
176 err = -bt_to_errno(hdev->req_result);
177 break;
178
179 case HCI_REQ_CANCELED:
180 err = -hdev->req_result;
181 break;
182
183 default:
184 err = -ETIMEDOUT;
185 break;
186 }
187
188 hdev->req_status = 0;
189 hdev->req_result = 0;
190 skb = hdev->req_skb;
191 hdev->req_skb = NULL;
192
193 bt_dev_dbg(hdev, "end: err %d", err);
194
195 if (err < 0) {
196 kfree_skb(skb);
197 return ERR_PTR(err);
198 }
199
6a98e383
MH		 200 return skb;
201}
202EXPORT_SYMBOL(__hci_cmd_sync_sk);
203
204/* This function requires the caller holds hdev->req_lock. */
205struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
206 const void *param, u32 timeout)
207{
208 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
209}
210EXPORT_SYMBOL(__hci_cmd_sync);
211
212/* Send HCI command and wait for command complete event */
213struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
214 const void *param, u32 timeout)
215{
216 struct sk_buff *skb;
217
218 if (!test_bit(HCI_UP, &hdev->flags))
219 return ERR_PTR(-ENETDOWN);
220
221 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
222
223 hci_req_sync_lock(hdev);
224 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
225 hci_req_sync_unlock(hdev);
226
227 return skb;
228}
229EXPORT_SYMBOL(hci_cmd_sync);
230
231/* This function requires the caller holds hdev->req_lock. */
232struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
233 const void *param, u8 event, u32 timeout)
234{
235 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
236 NULL);
237}
238EXPORT_SYMBOL(__hci_cmd_sync_ev);
239
240/* This function requires the caller holds hdev->req_lock. */
241int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
242 const void *param, u8 event, u32 timeout,
243 struct sock *sk)
244{
245 struct sk_buff *skb;
246 u8 status;
247
248 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
abfeea47 249 if (IS_ERR(skb)) {
b62e7220
LAD		 250 if (!event)
251 bt_dev_err(hdev, "Opcode 0x%4x failed: %ld", opcode,
252 PTR_ERR(skb));
6a98e383
MH		 253 return PTR_ERR(skb);
254 }
255
abfeea47
LAD		 256 /* If command return a status event skb will be set to NULL as there are
257 * no parameters, in case of failure IS_ERR(skb) would have be set to
258 * the actual error would be found with PTR_ERR(skb).
259 */
260 if (!skb)
261 return 0;
262
6a98e383
MH		 263 status = skb->data[0];
264
265 kfree_skb(skb);
266
267 return status;
268}
269EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
270
271int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
272 const void *param, u32 timeout)
273{
274 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
275 NULL);
276}
277EXPORT_SYMBOL(__hci_cmd_sync_status);
278
279static void hci_cmd_sync_work(struct work_struct *work)
280{
281 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
6a98e383
MH		 282
283 bt_dev_dbg(hdev, "");
284
008ee9eb
LAD		 285 /* Dequeue all entries and run them */
286 while (1) {
287 struct hci_cmd_sync_work_entry *entry;
6a98e383 288
008ee9eb
LAD		 289 mutex_lock(&hdev->cmd_sync_work_lock);
290 entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
291 struct hci_cmd_sync_work_entry,
292 list);
293 if (entry)
294 list_del(&entry->list);
295 mutex_unlock(&hdev->cmd_sync_work_lock);
6a98e383 296
008ee9eb
LAD		 297 if (!entry)
298 break;
6a98e383 299
008ee9eb 300 bt_dev_dbg(hdev, "entry %p", entry);
6a98e383 301
008ee9eb
LAD		 302 if (entry->func) {
303 int err;
6a98e383 304
008ee9eb
LAD		 305 hci_req_sync_lock(hdev);
306 err = entry->func(hdev, entry->data);
307 if (entry->destroy)
308 entry->destroy(hdev, entry->data, err);
309 hci_req_sync_unlock(hdev);
310 }
311
312 kfree(entry);
6a98e383
MH		 313 }
314}
315
744451c1
BB		 316static void hci_cmd_sync_cancel_work(struct work_struct *work)
317{
318 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
319
320 cancel_delayed_work_sync(&hdev->cmd_timer);
321 cancel_delayed_work_sync(&hdev->ncmd_timer);
322 atomic_set(&hdev->cmd_cnt, 1);
323
324 wake_up_interruptible(&hdev->req_wait_q);
325}
326
8ffde2a7
BG		 327static int hci_scan_disable_sync(struct hci_dev *hdev);
328static int scan_disable_sync(struct hci_dev *hdev, void *data)
329{
330 return hci_scan_disable_sync(hdev);
331}
332
333static int hci_inquiry_sync(struct hci_dev *hdev, u8 length);
334static int interleaved_inquiry_sync(struct hci_dev *hdev, void *data)
335{
336 return hci_inquiry_sync(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN);
337}
338
339static void le_scan_disable(struct work_struct *work)
340{
341 struct hci_dev *hdev = container_of(work, struct hci_dev,
342 le_scan_disable.work);
343 int status;
344
345 bt_dev_dbg(hdev, "");
346 hci_dev_lock(hdev);
347
348 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
349 goto _return;
350
351 cancel_delayed_work(&hdev->le_scan_restart);
352
353 status = hci_cmd_sync_queue(hdev, scan_disable_sync, NULL, NULL);
354 if (status) {
355 bt_dev_err(hdev, "failed to disable LE scan: %d", status);
356 goto _return;
357 }
358
359 hdev->discovery.scan_start = 0;
360
361 /* If we were running LE only scan, change discovery state. If
362 * we were running both LE and BR/EDR inquiry simultaneously,
363 * and BR/EDR inquiry is already finished, stop discovery,
364 * otherwise BR/EDR inquiry will stop discovery when finished.
365 * If we will resolve remote device name, do not change
366 * discovery state.
367 */
368
369 if (hdev->discovery.type == DISCOV_TYPE_LE)
370 goto discov_stopped;
371
372 if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED)
373 goto _return;
374
375 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) {
376 if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
377 hdev->discovery.state != DISCOVERY_RESOLVING)
378 goto discov_stopped;
379
380 goto _return;
381 }
382
383 status = hci_cmd_sync_queue(hdev, interleaved_inquiry_sync, NULL, NULL);
384 if (status) {
385 bt_dev_err(hdev, "inquiry failed: status %d", status);
386 goto discov_stopped;
387 }
388
389 goto _return;
390
391discov_stopped:
392 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
393
394_return:
395 hci_dev_unlock(hdev);
396}
397
27d54b77
BG		 398static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
399 u8 filter_dup);
400static int hci_le_scan_restart_sync(struct hci_dev *hdev)
401{
402 /* If controller is not scanning we are done. */
403 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
404 return 0;
405
406 if (hdev->scanning_paused) {
407 bt_dev_dbg(hdev, "Scanning is paused for suspend");
408 return 0;
409 }
410
411 hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
412 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE,
413 LE_SCAN_FILTER_DUP_ENABLE);
414}
415
416static int le_scan_restart_sync(struct hci_dev *hdev, void *data)
417{
418 return hci_le_scan_restart_sync(hdev);
419}
420
421static void le_scan_restart(struct work_struct *work)
422{
423 struct hci_dev *hdev = container_of(work, struct hci_dev,
424 le_scan_restart.work);
425 unsigned long timeout, duration, scan_start, now;
426 int status;
427
428 bt_dev_dbg(hdev, "");
429
430 hci_dev_lock(hdev);
431
432 status = hci_cmd_sync_queue(hdev, le_scan_restart_sync, NULL, NULL);
433 if (status) {
434 bt_dev_err(hdev, "failed to restart LE scan: status %d",
435 status);
436 goto unlock;
437 }
438
439 if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
440 !hdev->discovery.scan_start)
441 goto unlock;
442
443 /* When the scan was started, hdev->le_scan_disable has been queued
444 * after duration from scan_start. During scan restart this job
445 * has been canceled, and we need to queue it again after proper
446 * timeout, to make sure that scan does not run indefinitely.
447 */
448 duration = hdev->discovery.scan_duration;
449 scan_start = hdev->discovery.scan_start;
450 now = jiffies;
451 if (now - scan_start <= duration) {
452 int elapsed;
453
454 if (now >= scan_start)
455 elapsed = now - scan_start;
456 else
457 elapsed = ULONG_MAX - scan_start + now;
458
459 timeout = duration - elapsed;
460 } else {
461 timeout = 0;
462 }
463
464 queue_delayed_work(hdev->req_workqueue,
465 &hdev->le_scan_disable, timeout);
466
467unlock:
468 hci_dev_unlock(hdev);
469}
470
b338d917
BG		 471static int reenable_adv_sync(struct hci_dev *hdev, void *data)
472{
473 bt_dev_dbg(hdev, "");
474
475 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
476 list_empty(&hdev->adv_instances))
477 return 0;
478
479 if (hdev->cur_adv_instance) {
480 return hci_schedule_adv_instance_sync(hdev,
481 hdev->cur_adv_instance,
482 true);
483 } else {
484 if (ext_adv_capable(hdev)) {
485 hci_start_ext_adv_sync(hdev, 0x00);
486 } else {
487 hci_update_adv_data_sync(hdev, 0x00);
488 hci_update_scan_rsp_data_sync(hdev, 0x00);
489 hci_enable_advertising_sync(hdev);
490 }
491 }
492
493 return 0;
494}
495
496static void reenable_adv(struct work_struct *work)
497{
498 struct hci_dev *hdev = container_of(work, struct hci_dev,
499 reenable_adv_work);
500 int status;
501
502 bt_dev_dbg(hdev, "");
503
504 hci_dev_lock(hdev);
505
506 status = hci_cmd_sync_queue(hdev, reenable_adv_sync, NULL, NULL);
507 if (status)
508 bt_dev_err(hdev, "failed to reenable ADV: %d", status);
509
510 hci_dev_unlock(hdev);
511}
512
c249ea9b
BG		 513static void cancel_adv_timeout(struct hci_dev *hdev)
514{
515 if (hdev->adv_instance_timeout) {
516 hdev->adv_instance_timeout = 0;
517 cancel_delayed_work(&hdev->adv_instance_expire);
518 }
519}
520
521/* For a single instance:
522 * - force == true: The instance will be removed even when its remaining
523 * lifetime is not zero.
524 * - force == false: the instance will be deactivated but kept stored unless
525 * the remaining lifetime is zero.
526 *
527 * For instance == 0x00:
528 * - force == true: All instances will be removed regardless of their timeout
529 * setting.
530 * - force == false: Only instances that have a timeout will be removed.
531 */
532int hci_clear_adv_instance_sync(struct hci_dev *hdev, struct sock *sk,
533 u8 instance, bool force)
534{
535 struct adv_info *adv_instance, *n, *next_instance = NULL;
536 int err;
537 u8 rem_inst;
538
539 /* Cancel any timeout concerning the removed instance(s). */
540 if (!instance || hdev->cur_adv_instance == instance)
541 cancel_adv_timeout(hdev);
542
543 /* Get the next instance to advertise BEFORE we remove
544 * the current one. This can be the same instance again
545 * if there is only one instance.
546 */
547 if (instance && hdev->cur_adv_instance == instance)
548 next_instance = hci_get_next_instance(hdev, instance);
549
550 if (instance == 0x00) {
551 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances,
552 list) {
553 if (!(force || adv_instance->timeout))
554 continue;
555
556 rem_inst = adv_instance->instance;
557 err = hci_remove_adv_instance(hdev, rem_inst);
558 if (!err)
559 mgmt_advertising_removed(sk, hdev, rem_inst);
560 }
561 } else {
562 adv_instance = hci_find_adv_instance(hdev, instance);
563
564 if (force || (adv_instance && adv_instance->timeout &&
565 !adv_instance->remaining_time)) {
566 /* Don't advertise a removed instance. */
567 if (next_instance &&
568 next_instance->instance == instance)
569 next_instance = NULL;
570
571 err = hci_remove_adv_instance(hdev, instance);
572 if (!err)
573 mgmt_advertising_removed(sk, hdev, instance);
574 }
575 }
576
577 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
578 return 0;
579
580 if (next_instance && !ext_adv_capable(hdev))
581 return hci_schedule_adv_instance_sync(hdev,
582 next_instance->instance,
583 false);
584
585 return 0;
586}
587
588static int adv_timeout_expire_sync(struct hci_dev *hdev, void *data)
589{
590 u8 instance = *(u8 *)data;
591
592 kfree(data);
593
594 hci_clear_adv_instance_sync(hdev, NULL, instance, false);
595
596 if (list_empty(&hdev->adv_instances))
597 return hci_disable_advertising_sync(hdev);
598
599 return 0;
600}
601
602static void adv_timeout_expire(struct work_struct *work)
603{
604 u8 *inst_ptr;
605 struct hci_dev *hdev = container_of(work, struct hci_dev,
606 adv_instance_expire.work);
607
608 bt_dev_dbg(hdev, "");
609
610 hci_dev_lock(hdev);
611
612 hdev->adv_instance_timeout = 0;
613
614 if (hdev->cur_adv_instance == 0x00)
615 goto unlock;
616
617 inst_ptr = kmalloc(1, GFP_KERNEL);
618 if (!inst_ptr)
619 goto unlock;
620
621 *inst_ptr = hdev->cur_adv_instance;
622 hci_cmd_sync_queue(hdev, adv_timeout_expire_sync, inst_ptr, NULL);
623
624unlock:
625 hci_dev_unlock(hdev);
626}
627
6a98e383
MH		 628void hci_cmd_sync_init(struct hci_dev *hdev)
629{
630 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
631 INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
632 mutex_init(&hdev->cmd_sync_work_lock);
1857c199 633 mutex_init(&hdev->unregister_lock);
744451c1
BB		 634
635 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
b338d917 636 INIT_WORK(&hdev->reenable_adv_work, reenable_adv);
8ffde2a7 637 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable);
27d54b77 638 INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart);
c249ea9b 639 INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
6a98e383
MH		 640}
641
642void hci_cmd_sync_clear(struct hci_dev *hdev)
643{
644 struct hci_cmd_sync_work_entry *entry, *tmp;
645
646 cancel_work_sync(&hdev->cmd_sync_work);
b338d917 647 cancel_work_sync(&hdev->reenable_adv_work);
6a98e383 648
1c66bee4 649 mutex_lock(&hdev->cmd_sync_work_lock);
6a98e383
MH		 650 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
651 if (entry->destroy)
652 entry->destroy(hdev, entry->data, -ECANCELED);
653
654 list_del(&entry->list);
655 kfree(entry);
656 }
1c66bee4 657 mutex_unlock(&hdev->cmd_sync_work_lock);
6a98e383
MH		 658}
659
744451c1 660void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
914b08b3
BB		 661{
662 bt_dev_dbg(hdev, "err 0x%2.2x", err);
663
664 if (hdev->req_status == HCI_REQ_PEND) {
665 hdev->req_result = err;
666 hdev->req_status = HCI_REQ_CANCELED;
667
668 cancel_delayed_work_sync(&hdev->cmd_timer);
669 cancel_delayed_work_sync(&hdev->ncmd_timer);
670 atomic_set(&hdev->cmd_cnt, 1);
671
672 wake_up_interruptible(&hdev->req_wait_q);
673 }
674}
744451c1
BB		 675
676void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
677{
678 bt_dev_dbg(hdev, "err 0x%2.2x", err);
679
680 if (hdev->req_status == HCI_REQ_PEND) {
681 hdev->req_result = err;
682 hdev->req_status = HCI_REQ_CANCELED;
683
684 queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
685 }
686}
914b08b3
BB		 687EXPORT_SYMBOL(hci_cmd_sync_cancel);
688
d883a466
LAD		 689/* Submit HCI command to be run in as cmd_sync_work:
690 *
691 * - hdev must _not_ be unregistered
692 */
693int hci_cmd_sync_submit(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
694 void *data, hci_cmd_sync_work_destroy_t destroy)
6a98e383
MH		 695{
696 struct hci_cmd_sync_work_entry *entry;
1857c199 697 int err = 0;
6a98e383 698
1857c199
ZJ		 699 mutex_lock(&hdev->unregister_lock);
700 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
701 err = -ENODEV;
702 goto unlock;
703 }
0b94f265 704
6a98e383 705 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
1857c199
ZJ		 706 if (!entry) {
707 err = -ENOMEM;
708 goto unlock;
709 }
6a98e383
MH		 710 entry->func = func;
711 entry->data = data;
712 entry->destroy = destroy;
713
714 mutex_lock(&hdev->cmd_sync_work_lock);
715 list_add_tail(&entry->list, &hdev->cmd_sync_work_list);
716 mutex_unlock(&hdev->cmd_sync_work_lock);
717
718 queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
719
1857c199
ZJ		 720unlock:
721 mutex_unlock(&hdev->unregister_lock);
722 return err;
6a98e383 723}
d883a466
LAD		 724EXPORT_SYMBOL(hci_cmd_sync_submit);
725
726/* Queue HCI command:
727 *
728 * - hdev must be running
729 */
730int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
731 void *data, hci_cmd_sync_work_destroy_t destroy)
732{
733 /* Only queue command if hdev is running which means it had been opened
734 * and is either on init phase or is already up.
735 */
736 if (!test_bit(HCI_RUNNING, &hdev->flags))
737 return -ENETDOWN;
738
739 return hci_cmd_sync_submit(hdev, func, data, destroy);
740}
6a98e383 741EXPORT_SYMBOL(hci_cmd_sync_queue);
161510cc
LAD		 742
743int hci_update_eir_sync(struct hci_dev *hdev)
744{
745 struct hci_cp_write_eir cp;
746
747 bt_dev_dbg(hdev, "");
748
749 if (!hdev_is_powered(hdev))
750 return 0;
751
752 if (!lmp_ext_inq_capable(hdev))
753 return 0;
754
755 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
756 return 0;
757
758 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
759 return 0;
760
761 memset(&cp, 0, sizeof(cp));
762
763 eir_create(hdev, cp.data);
764
765 if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
766 return 0;
767
768 memcpy(hdev->eir, cp.data, sizeof(cp.data));
769
770 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
771 HCI_CMD_TIMEOUT);
772}
773
774static u8 get_service_classes(struct hci_dev *hdev)
775{
776 struct bt_uuid *uuid;
777 u8 val = 0;
778
779 list_for_each_entry(uuid, &hdev->uuids, list)
780 val |= uuid->svc_hint;
781
782 return val;
783}
784
785int hci_update_class_sync(struct hci_dev *hdev)
786{
787 u8 cod[3];
788
789 bt_dev_dbg(hdev, "");
790
791 if (!hdev_is_powered(hdev))
792 return 0;
793
794 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
795 return 0;
796
797 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
798 return 0;
799
800 cod[0] = hdev->minor_class;
801 cod[1] = hdev->major_class;
802 cod[2] = get_service_classes(hdev);
803
804 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
805 cod[1] |= 0x20;
806
807 if (memcmp(cod, hdev->dev_class, 3) == 0)
808 return 0;
809
810 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
811 sizeof(cod), cod, HCI_CMD_TIMEOUT);
812}
cba6b758
LAD		 813
814static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
815{
816 /* If there is no connection we are OK to advertise. */
817 if (hci_conn_num(hdev, LE_LINK) == 0)
818 return true;
819
820 /* Check le_states if there is any connection in peripheral role. */
821 if (hdev->conn_hash.le_num_peripheral > 0) {
822 /* Peripheral connection state and non connectable mode
823 * bit 20.
824 */
825 if (!connectable && !(hdev->le_states[2] & 0x10))
826 return false;
827
828 /* Peripheral connection state and connectable mode bit 38
829 * and scannable bit 21.
830 */
831 if (connectable && (!(hdev->le_states[4] & 0x40) ||
832 !(hdev->le_states[2] & 0x20)))
833 return false;
834 }
835
836 /* Check le_states if there is any connection in central role. */
837 if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
838 /* Central connection state and non connectable mode bit 18. */
839 if (!connectable && !(hdev->le_states[2] & 0x02))
840 return false;
841
842 /* Central connection state and connectable mode bit 35 and
843 * scannable 19.
844 */
845 if (connectable && (!(hdev->le_states[4] & 0x08) ||
846 !(hdev->le_states[2] & 0x08)))
847 return false;
848 }
849
850 return true;
851}
852
853static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
854{
855 /* If privacy is not enabled don't use RPA */
856 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
857 return false;
858
859 /* If basic privacy mode is enabled use RPA */
860 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
861 return true;
862
863 /* If limited privacy mode is enabled don't use RPA if we're
864 * both discoverable and bondable.
865 */
866 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
867 hci_dev_test_flag(hdev, HCI_BONDABLE))
868 return false;
869
870 /* We're neither bondable nor discoverable in the limited
871 * privacy mode, therefore use RPA.
872 */
873 return true;
874}
875
876static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
877{
878 /* If we're advertising or initiating an LE connection we can't
879 * go ahead and change the random address at this time. This is
880 * because the eventual initiator address used for the
881 * subsequently created connection will be undefined (some
882 * controllers use the new address and others the one we had
883 * when the operation started).
884 *
885 * In this kind of scenario skip the update and let the random
886 * address be updated at the next cycle.
887 */
888 if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
889 hci_lookup_le_connect(hdev)) {
890 bt_dev_dbg(hdev, "Deferring random address update");
891 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
892 return 0;
893 }
894
895 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
896 6, rpa, HCI_CMD_TIMEOUT);
897}
898
899int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
900 bool rpa, u8 *own_addr_type)
901{
902 int err;
903
904 /* If privacy is enabled use a resolvable private address. If
905 * current RPA has expired or there is something else than
906 * the current RPA in use, then generate a new one.
907 */
908 if (rpa) {
909 /* If Controller supports LL Privacy use own address type is
910 * 0x03
911 */
ad383c2c 912 if (use_ll_privacy(hdev))
cba6b758
LAD		 913 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
914 else
915 *own_addr_type = ADDR_LE_DEV_RANDOM;
916
917 /* Check if RPA is valid */
918 if (rpa_valid(hdev))
919 return 0;
920
921 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
922 if (err < 0) {
923 bt_dev_err(hdev, "failed to generate new RPA");
924 return err;
925 }
926
927 err = hci_set_random_addr_sync(hdev, &hdev->rpa);
928 if (err)
929 return err;
930
931 return 0;
932 }
933
934 /* In case of required privacy without resolvable private address,
935 * use an non-resolvable private address. This is useful for active
936 * scanning and non-connectable advertising.
937 */
938 if (require_privacy) {
939 bdaddr_t nrpa;
940
941 while (true) {
942 /* The non-resolvable private address is generated
943 * from random six bytes with the two most significant
944 * bits cleared.
945 */
946 get_random_bytes(&nrpa, 6);
947 nrpa.b[5] &= 0x3f;
948
949 /* The non-resolvable private address shall not be
950 * equal to the public address.
951 */
952 if (bacmp(&hdev->bdaddr, &nrpa))
953 break;
954 }
955
956 *own_addr_type = ADDR_LE_DEV_RANDOM;
957
958 return hci_set_random_addr_sync(hdev, &nrpa);
959 }
960
961 /* If forcing static address is in use or there is no public
962 * address use the static address as random address (but skip
963 * the HCI command if the current random address is already the
964 * static one.
965 *
966 * In case BR/EDR has been disabled on a dual-mode controller
967 * and a static address has been configured, then use that
968 * address instead of the public BR/EDR address.
969 */
970 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
971 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
972 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
973 bacmp(&hdev->static_addr, BDADDR_ANY))) {
974 *own_addr_type = ADDR_LE_DEV_RANDOM;
975 if (bacmp(&hdev->static_addr, &hdev->random_addr))
976 return hci_set_random_addr_sync(hdev,
977 &hdev->static_addr);
978 return 0;
979 }
980
981 /* Neither privacy nor static address is being used so use a
982 * public address.
983 */
984 *own_addr_type = ADDR_LE_DEV_PUBLIC;
985
986 return 0;
987}
988
989static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
990{
991 struct hci_cp_le_set_ext_adv_enable *cp;
992 struct hci_cp_ext_adv_set *set;
993 u8 data[sizeof(*cp) + sizeof(*set) * 1];
994 u8 size;
995
996 /* If request specifies an instance that doesn't exist, fail */
997 if (instance > 0) {
998 struct adv_info *adv;
999
1000 adv = hci_find_adv_instance(hdev, instance);
1001 if (!adv)
1002 return -EINVAL;
1003
1004 /* If not enabled there is nothing to do */
1005 if (!adv->enabled)
1006 return 0;
1007 }
1008
1009 memset(data, 0, sizeof(data));
1010
1011 cp = (void *)data;
1012 set = (void *)cp->data;
1013
1014 /* Instance 0x00 indicates all advertising instances will be disabled */
1015 cp->num_of_sets = !!instance;
1016 cp->enable = 0x00;
1017
1018 set->handle = instance;
1019
1020 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
1021
1022 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1023 size, data, HCI_CMD_TIMEOUT);
1024}
1025
1026static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
1027 bdaddr_t *random_addr)
1028{
1029 struct hci_cp_le_set_adv_set_rand_addr cp;
1030 int err;
1031
1032 if (!instance) {
1033 /* Instance 0x00 doesn't have an adv_info, instead it uses
1034 * hdev->random_addr to track its address so whenever it needs
1035 * to be updated this also set the random address since
1036 * hdev->random_addr is shared with scan state machine.
1037 */
1038 err = hci_set_random_addr_sync(hdev, random_addr);
1039 if (err)
1040 return err;
1041 }
1042
1043 memset(&cp, 0, sizeof(cp));
1044
1045 cp.handle = instance;
1046 bacpy(&cp.bdaddr, random_addr);
1047
1048 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
1049 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1050}
1051
1052int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
1053{
1054 struct hci_cp_le_set_ext_adv_params cp;
1055 bool connectable;
1056 u32 flags;
1057 bdaddr_t random_addr;
1058 u8 own_addr_type;
1059 int err;
1060 struct adv_info *adv;
1061 bool secondary_adv;
1062
1063 if (instance > 0) {
1064 adv = hci_find_adv_instance(hdev, instance);
1065 if (!adv)
1066 return -EINVAL;
1067 } else {
1068 adv = NULL;
1069 }
1070
1071 /* Updating parameters of an active instance will return a
1072 * Command Disallowed error, so we must first disable the
1073 * instance if it is active.
1074 */
1075 if (adv && !adv->pending) {
1076 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1077 if (err)
1078 return err;
1079 }
1080
1081 flags = hci_adv_instance_flags(hdev, instance);
1082
1083 /* If the "connectable" instance flag was not set, then choose between
1084 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1085 */
1086 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1087 mgmt_get_connectable(hdev);
1088
1089 if (!is_advertising_allowed(hdev, connectable))
1090 return -EPERM;
1091
1092 /* Set require_privacy to true only when non-connectable
1093 * advertising is used. In that case it is fine to use a
1094 * non-resolvable private address.
1095 */
1096 err = hci_get_random_address(hdev, !connectable,
1097 adv_use_rpa(hdev, flags), adv,
1098 &own_addr_type, &random_addr);
1099 if (err < 0)
1100 return err;
1101
1102 memset(&cp, 0, sizeof(cp));
1103
1104 if (adv) {
1105 hci_cpu_to_le24(adv->min_interval, cp.min_interval);
1106 hci_cpu_to_le24(adv->max_interval, cp.max_interval);
1107 cp.tx_power = adv->tx_power;
1108 } else {
1109 hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
1110 hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
1111 cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
1112 }
1113
1114 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
1115
1116 if (connectable) {
1117 if (secondary_adv)
1118 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
1119 else
1120 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
1121 } else if (hci_adv_instance_is_scannable(hdev, instance) ||
1122 (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
1123 if (secondary_adv)
1124 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
1125 else
1126 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
1127 } else {
1128 if (secondary_adv)
1129 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
1130 else
1131 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
1132 }
1133
cf75ad8b
LAD		 1134 /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
1135 * contains the peer’s Identity Address and the Peer_Address_Type
1136 * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
1137 * These parameters are used to locate the corresponding local IRK in
1138 * the resolving list; this IRK is used to generate their own address
1139 * used in the advertisement.
1140 */
1141 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
1142 hci_copy_identity_address(hdev, &cp.peer_addr,
1143 &cp.peer_addr_type);
1144
cba6b758
LAD		 1145 cp.own_addr_type = own_addr_type;
1146 cp.channel_map = hdev->le_adv_channel_map;
1147 cp.handle = instance;
1148
1149 if (flags & MGMT_ADV_FLAG_SEC_2M) {
1150 cp.primary_phy = HCI_ADV_PHY_1M;
1151 cp.secondary_phy = HCI_ADV_PHY_2M;
1152 } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
1153 cp.primary_phy = HCI_ADV_PHY_CODED;
1154 cp.secondary_phy = HCI_ADV_PHY_CODED;
1155 } else {
1156 /* In all other cases use 1M */
1157 cp.primary_phy = HCI_ADV_PHY_1M;
1158 cp.secondary_phy = HCI_ADV_PHY_1M;
1159 }
1160
1161 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
1162 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1163 if (err)
1164 return err;
1165
1166 if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
1167 own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
1168 bacmp(&random_addr, BDADDR_ANY)) {
1169 /* Check if random address need to be updated */
1170 if (adv) {
1171 if (!bacmp(&random_addr, &adv->random_addr))
1172 return 0;
1173 } else {
1174 if (!bacmp(&random_addr, &hdev->random_addr))
1175 return 0;
1176 }
1177
1178 return hci_set_adv_set_random_addr_sync(hdev, instance,
1179 &random_addr);
1180 }
1181
1182 return 0;
1183}
1184
1185static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1186{
1187 struct {
1188 struct hci_cp_le_set_ext_scan_rsp_data cp;
1189 u8 data[HCI_MAX_EXT_AD_LENGTH];
1190 } pdu;
1191 u8 len;
34a718bc
LAD		 1192 struct adv_info *adv = NULL;
1193 int err;
cba6b758
LAD		 1194
1195 memset(&pdu, 0, sizeof(pdu));
1196
34a718bc
LAD		 1197 if (instance) {
1198 adv = hci_find_adv_instance(hdev, instance);
1199 if (!adv || !adv->scan_rsp_changed)
1200 return 0;
1201 }
cba6b758 1202
34a718bc 1203 len = eir_create_scan_rsp(hdev, instance, pdu.data);
cba6b758
LAD		 1204
1205 pdu.cp.handle = instance;
1206 pdu.cp.length = len;
1207 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1208 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1209
34a718bc
LAD		 1210 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
1211 sizeof(pdu.cp) + len, &pdu.cp,
1212 HCI_CMD_TIMEOUT);
1213 if (err)
1214 return err;
1215
1216 if (adv) {
1217 adv->scan_rsp_changed = false;
1218 } else {
1219 memcpy(hdev->scan_rsp_data, pdu.data, len);
1220 hdev->scan_rsp_data_len = len;
1221 }
1222
1223 return 0;
cba6b758
LAD		 1224}
1225
1226static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1227{
1228 struct hci_cp_le_set_scan_rsp_data cp;
1229 u8 len;
1230
1231 memset(&cp, 0, sizeof(cp));
1232
1233 len = eir_create_scan_rsp(hdev, instance, cp.data);
1234
1235 if (hdev->scan_rsp_data_len == len &&
1236 !memcmp(cp.data, hdev->scan_rsp_data, len))
1237 return 0;
1238
1239 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
1240 hdev->scan_rsp_data_len = len;
1241
1242 cp.length = len;
1243
1244 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
1245 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1246}
1247
1248int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
1249{
1250 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1251 return 0;
1252
1253 if (ext_adv_capable(hdev))
1254 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
1255
1256 return __hci_set_scan_rsp_data_sync(hdev, instance);
1257}
1258
1259int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
1260{
1261 struct hci_cp_le_set_ext_adv_enable *cp;
1262 struct hci_cp_ext_adv_set *set;
1263 u8 data[sizeof(*cp) + sizeof(*set) * 1];
1264 struct adv_info *adv;
1265
1266 if (instance > 0) {
1267 adv = hci_find_adv_instance(hdev, instance);
1268 if (!adv)
1269 return -EINVAL;
1270 /* If already enabled there is nothing to do */
1271 if (adv->enabled)
1272 return 0;
1273 } else {
1274 adv = NULL;
1275 }
1276
1277 cp = (void *)data;
1278 set = (void *)cp->data;
1279
1280 memset(cp, 0, sizeof(*cp));
1281
1282 cp->enable = 0x01;
1283 cp->num_of_sets = 0x01;
1284
1285 memset(set, 0, sizeof(*set));
1286
1287 set->handle = instance;
1288
1289 /* Set duration per instance since controller is responsible for
1290 * scheduling it.
1291 */
f16a491c 1292 if (adv && adv->timeout) {
cba6b758
LAD		 1293 u16 duration = adv->timeout * MSEC_PER_SEC;
1294
1295 /* Time = N * 10 ms */
1296 set->duration = cpu_to_le16(duration / 10);
1297 }
1298
1299 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
1300 sizeof(*cp) +
1301 sizeof(*set) * cp->num_of_sets,
1302 data, HCI_CMD_TIMEOUT);
1303}
1304
1305int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
1306{
1307 int err;
1308
1309 err = hci_setup_ext_adv_instance_sync(hdev, instance);
1310 if (err)
1311 return err;
1312
1313 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
1314 if (err)
1315 return err;
1316
1317 return hci_enable_ext_advertising_sync(hdev, instance);
1318}
1319
eca0ae4a
LAD		 1320static int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1321{
1322 struct hci_cp_le_set_per_adv_enable cp;
6a42e9bf 1323 struct adv_info *adv = NULL;
eca0ae4a
LAD		 1324
1325 /* If periodic advertising already disabled there is nothing to do. */
6a42e9bf
IT		 1326 adv = hci_find_adv_instance(hdev, instance);
1327 if (!adv || !adv->periodic || !adv->enabled)
eca0ae4a
LAD		 1328 return 0;
1329
1330 memset(&cp, 0, sizeof(cp));
1331
1332 cp.enable = 0x00;
1333 cp.handle = instance;
1334
1335 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1336 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1337}
1338
1339static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance,
1340 u16 min_interval, u16 max_interval)
1341{
1342 struct hci_cp_le_set_per_adv_params cp;
1343
1344 memset(&cp, 0, sizeof(cp));
1345
1346 if (!min_interval)
1347 min_interval = DISCOV_LE_PER_ADV_INT_MIN;
1348
1349 if (!max_interval)
1350 max_interval = DISCOV_LE_PER_ADV_INT_MAX;
1351
1352 cp.handle = instance;
1353 cp.min_interval = cpu_to_le16(min_interval);
1354 cp.max_interval = cpu_to_le16(max_interval);
1355 cp.periodic_properties = 0x0000;
1356
1357 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS,
1358 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1359}
1360
1361static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance)
1362{
1363 struct {
1364 struct hci_cp_le_set_per_adv_data cp;
1365 u8 data[HCI_MAX_PER_AD_LENGTH];
1366 } pdu;
1367 u8 len;
1368
1369 memset(&pdu, 0, sizeof(pdu));
1370
1371 if (instance) {
1372 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1373
1374 if (!adv || !adv->periodic)
1375 return 0;
1376 }
1377
1378 len = eir_create_per_adv_data(hdev, instance, pdu.data);
1379
1380 pdu.cp.length = len;
1381 pdu.cp.handle = instance;
1382 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1383
1384 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA,
1385 sizeof(pdu.cp) + len, &pdu,
1386 HCI_CMD_TIMEOUT);
1387}
1388
1389static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance)
1390{
1391 struct hci_cp_le_set_per_adv_enable cp;
6a42e9bf 1392 struct adv_info *adv = NULL;
eca0ae4a
LAD		 1393
1394 /* If periodic advertising already enabled there is nothing to do. */
6a42e9bf
IT		 1395 adv = hci_find_adv_instance(hdev, instance);
1396 if (adv && adv->periodic && adv->enabled)
eca0ae4a
LAD		 1397 return 0;
1398
1399 memset(&cp, 0, sizeof(cp));
1400
1401 cp.enable = 0x01;
1402 cp.handle = instance;
1403
1404 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE,
1405 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1406}
1407
1408/* Checks if periodic advertising data contains a Basic Announcement and if it
1409 * does generates a Broadcast ID and add Broadcast Announcement.
1410 */
1411static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv)
1412{
1413 u8 bid[3];
1414 u8 ad[4 + 3];
1415
1416 /* Skip if NULL adv as instance 0x00 is used for general purpose
1417 * advertising so it cannot used for the likes of Broadcast Announcement
1418 * as it can be overwritten at any point.
1419 */
1420 if (!adv)
1421 return 0;
1422
1423 /* Check if PA data doesn't contains a Basic Audio Announcement then
1424 * there is nothing to do.
1425 */
1426 if (!eir_get_service_data(adv->per_adv_data, adv->per_adv_data_len,
1427 0x1851, NULL))
1428 return 0;
1429
1430 /* Check if advertising data already has a Broadcast Announcement since
1431 * the process may want to control the Broadcast ID directly and in that
1432 * case the kernel shall no interfere.
1433 */
1434 if (eir_get_service_data(adv->adv_data, adv->adv_data_len, 0x1852,
1435 NULL))
1436 return 0;
1437
1438 /* Generate Broadcast ID */
1439 get_random_bytes(bid, sizeof(bid));
1440 eir_append_service_data(ad, 0, 0x1852, bid, sizeof(bid));
1441 hci_set_adv_instance_data(hdev, adv->instance, sizeof(ad), ad, 0, NULL);
1442
1443 return hci_update_adv_data_sync(hdev, adv->instance);
1444}
1445
1446int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len,
1447 u8 *data, u32 flags, u16 min_interval,
1448 u16 max_interval, u16 sync_interval)
1449{
1450 struct adv_info *adv = NULL;
1451 int err;
1452 bool added = false;
1453
1454 hci_disable_per_advertising_sync(hdev, instance);
1455
1456 if (instance) {
1457 adv = hci_find_adv_instance(hdev, instance);
1458 /* Create an instance if that could not be found */
1459 if (!adv) {
1460 adv = hci_add_per_instance(hdev, instance, flags,
1461 data_len, data,
1462 sync_interval,
1463 sync_interval);
1464 if (IS_ERR(adv))
1465 return PTR_ERR(adv);
6a42e9bf 1466 adv->pending = false;
eca0ae4a
LAD		 1467 added = true;
1468 }
1469 }
1470
6a42e9bf
IT		 1471 /* Start advertising */
1472 err = hci_start_ext_adv_sync(hdev, instance);
1473 if (err < 0)
1474 goto fail;
1475
1476 err = hci_adv_bcast_annoucement(hdev, adv);
1477 if (err < 0)
1478 goto fail;
eca0ae4a
LAD		 1479
1480 err = hci_set_per_adv_params_sync(hdev, instance, min_interval,
1481 max_interval);
1482 if (err < 0)
1483 goto fail;
1484
1485 err = hci_set_per_adv_data_sync(hdev, instance);
1486 if (err < 0)
1487 goto fail;
1488
1489 err = hci_enable_per_advertising_sync(hdev, instance);
1490 if (err < 0)
1491 goto fail;
1492
1493 return 0;
1494
1495fail:
1496 if (added)
1497 hci_remove_adv_instance(hdev, instance);
1498
1499 return err;
1500}
1501
cba6b758
LAD		 1502static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
1503{
1504 int err;
1505
1506 if (ext_adv_capable(hdev))
1507 return hci_start_ext_adv_sync(hdev, instance);
1508
1509 err = hci_update_adv_data_sync(hdev, instance);
1510 if (err)
1511 return err;
1512
1513 err = hci_update_scan_rsp_data_sync(hdev, instance);
1514 if (err)
1515 return err;
1516
1517 return hci_enable_advertising_sync(hdev);
1518}
1519
1520int hci_enable_advertising_sync(struct hci_dev *hdev)
1521{
1522 struct adv_info *adv_instance;
1523 struct hci_cp_le_set_adv_param cp;
1524 u8 own_addr_type, enable = 0x01;
1525 bool connectable;
1526 u16 adv_min_interval, adv_max_interval;
1527 u32 flags;
1528 u8 status;
1529
ad383c2c
LAD		 1530 if (ext_adv_capable(hdev))
1531 return hci_enable_ext_advertising_sync(hdev,
1532 hdev->cur_adv_instance);
1533
cba6b758
LAD		 1534 flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
1535 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
1536
1537 /* If the "connectable" instance flag was not set, then choose between
1538 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1539 */
1540 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1541 mgmt_get_connectable(hdev);
1542
1543 if (!is_advertising_allowed(hdev, connectable))
1544 return -EINVAL;
1545
ad383c2c
LAD		 1546 status = hci_disable_advertising_sync(hdev);
1547 if (status)
1548 return status;
cba6b758
LAD		 1549
1550 /* Clear the HCI_LE_ADV bit temporarily so that the
1551 * hci_update_random_address knows that it's safe to go ahead
1552 * and write a new random address. The flag will be set back on
1553 * as soon as the SET_ADV_ENABLE HCI command completes.
1554 */
1555 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1556
1557 /* Set require_privacy to true only when non-connectable
1558 * advertising is used. In that case it is fine to use a
1559 * non-resolvable private address.
1560 */
1561 status = hci_update_random_address_sync(hdev, !connectable,
1562 adv_use_rpa(hdev, flags),
1563 &own_addr_type);
1564 if (status)
1565 return status;
1566
1567 memset(&cp, 0, sizeof(cp));
1568
1569 if (adv_instance) {
1570 adv_min_interval = adv_instance->min_interval;
1571 adv_max_interval = adv_instance->max_interval;
1572 } else {
1573 adv_min_interval = hdev->le_adv_min_interval;
1574 adv_max_interval = hdev->le_adv_max_interval;
1575 }
1576
1577 if (connectable) {
1578 cp.type = LE_ADV_IND;
1579 } else {
1580 if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
1581 cp.type = LE_ADV_SCAN_IND;
1582 else
1583 cp.type = LE_ADV_NONCONN_IND;
1584
1585 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1586 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
1587 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
1588 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
1589 }
1590 }
1591
1592 cp.min_interval = cpu_to_le16(adv_min_interval);
1593 cp.max_interval = cpu_to_le16(adv_max_interval);
1594 cp.own_address_type = own_addr_type;
1595 cp.channel_map = hdev->le_adv_channel_map;
1596
1597 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
1598 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1599 if (status)
1600 return status;
1601
1602 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1603 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1604}
1605
abfeea47
LAD		 1606static int enable_advertising_sync(struct hci_dev *hdev, void *data)
1607{
1608 return hci_enable_advertising_sync(hdev);
1609}
1610
1611int hci_enable_advertising(struct hci_dev *hdev)
1612{
1613 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
1614 list_empty(&hdev->adv_instances))
1615 return 0;
1616
1617 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
1618}
1619
1620int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1621 struct sock *sk)
cba6b758
LAD		 1622{
1623 int err;
1624
1625 if (!ext_adv_capable(hdev))
1626 return 0;
1627
1628 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1629 if (err)
1630 return err;
1631
1632 /* If request specifies an instance that doesn't exist, fail */
1633 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
1634 return -EINVAL;
1635
1636 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
1637 sizeof(instance), &instance, 0,
1638 HCI_CMD_TIMEOUT, sk);
1639}
1640
eca0ae4a
LAD		 1641static int remove_ext_adv_sync(struct hci_dev *hdev, void *data)
1642{
1643 struct adv_info *adv = data;
1644 u8 instance = 0;
1645
1646 if (adv)
1647 instance = adv->instance;
1648
1649 return hci_remove_ext_adv_instance_sync(hdev, instance, NULL);
1650}
1651
1652int hci_remove_ext_adv_instance(struct hci_dev *hdev, u8 instance)
1653{
1654 struct adv_info *adv = NULL;
1655
1656 if (instance) {
1657 adv = hci_find_adv_instance(hdev, instance);
1658 if (!adv)
1659 return -EINVAL;
1660 }
1661
1662 return hci_cmd_sync_queue(hdev, remove_ext_adv_sync, adv, NULL);
1663}
1664
1665int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason)
1666{
1667 struct hci_cp_le_term_big cp;
1668
1669 memset(&cp, 0, sizeof(cp));
1670 cp.handle = handle;
1671 cp.reason = reason;
1672
1673 return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG,
1674 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1675}
1676
cba6b758
LAD		 1677static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1678{
1679 struct {
1680 struct hci_cp_le_set_ext_adv_data cp;
1681 u8 data[HCI_MAX_EXT_AD_LENGTH];
1682 } pdu;
1683 u8 len;
34a718bc
LAD		 1684 struct adv_info *adv = NULL;
1685 int err;
cba6b758
LAD		 1686
1687 memset(&pdu, 0, sizeof(pdu));
1688
34a718bc
LAD		 1689 if (instance) {
1690 adv = hci_find_adv_instance(hdev, instance);
1691 if (!adv || !adv->adv_data_changed)
1692 return 0;
1693 }
cba6b758 1694
34a718bc 1695 len = eir_create_adv_data(hdev, instance, pdu.data);
cba6b758
LAD		 1696
1697 pdu.cp.length = len;
1698 pdu.cp.handle = instance;
1699 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1700 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1701
34a718bc
LAD		 1702 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1703 sizeof(pdu.cp) + len, &pdu.cp,
1704 HCI_CMD_TIMEOUT);
1705 if (err)
1706 return err;
1707
1708 /* Update data if the command succeed */
1709 if (adv) {
1710 adv->adv_data_changed = false;
1711 } else {
1712 memcpy(hdev->adv_data, pdu.data, len);
1713 hdev->adv_data_len = len;
1714 }
1715
1716 return 0;
cba6b758
LAD		 1717}
1718
1719static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1720{
1721 struct hci_cp_le_set_adv_data cp;
1722 u8 len;
1723
1724 memset(&cp, 0, sizeof(cp));
1725
1726 len = eir_create_adv_data(hdev, instance, cp.data);
1727
1728 /* There's nothing to do if the data hasn't changed */
1729 if (hdev->adv_data_len == len &&
1730 memcmp(cp.data, hdev->adv_data, len) == 0)
1731 return 0;
1732
1733 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1734 hdev->adv_data_len = len;
1735
1736 cp.length = len;
1737
1738 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1739 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1740}
1741
1742int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1743{
1744 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1745 return 0;
1746
1747 if (ext_adv_capable(hdev))
1748 return hci_set_ext_adv_data_sync(hdev, instance);
1749
1750 return hci_set_adv_data_sync(hdev, instance);
1751}
1752
1753int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1754 bool force)
1755{
1756 struct adv_info *adv = NULL;
1757 u16 timeout;
1758
cf75ad8b 1759 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
cba6b758
LAD		 1760 return -EPERM;
1761
1762 if (hdev->adv_instance_timeout)
1763 return -EBUSY;
1764
1765 adv = hci_find_adv_instance(hdev, instance);
1766 if (!adv)
1767 return -ENOENT;
1768
1769 /* A zero timeout means unlimited advertising. As long as there is
1770 * only one instance, duration should be ignored. We still set a timeout
1771 * in case further instances are being added later on.
1772 *
1773 * If the remaining lifetime of the instance is more than the duration
1774 * then the timeout corresponds to the duration, otherwise it will be
1775 * reduced to the remaining instance lifetime.
1776 */
1777 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
1778 timeout = adv->duration;
1779 else
1780 timeout = adv->remaining_time;
1781
1782 /* The remaining time is being reduced unless the instance is being
1783 * advertised without time limit.
1784 */
1785 if (adv->timeout)
1786 adv->remaining_time = adv->remaining_time - timeout;
1787
1788 /* Only use work for scheduling instances with legacy advertising */
1789 if (!ext_adv_capable(hdev)) {
1790 hdev->adv_instance_timeout = timeout;
1791 queue_delayed_work(hdev->req_workqueue,
1792 &hdev->adv_instance_expire,
1793 msecs_to_jiffies(timeout * 1000));
1794 }
1795
1796 /* If we're just re-scheduling the same instance again then do not
1797 * execute any HCI commands. This happens when a single instance is
1798 * being advertised.
1799 */
1800 if (!force && hdev->cur_adv_instance == instance &&
1801 hci_dev_test_flag(hdev, HCI_LE_ADV))
1802 return 0;
1803
1804 hdev->cur_adv_instance = instance;
1805
1806 return hci_start_adv_sync(hdev, instance);
1807}
1808
1809static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
1810{
1811 int err;
1812
1813 if (!ext_adv_capable(hdev))
1814 return 0;
1815
1816 /* Disable instance 0x00 to disable all instances */
1817 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1818 if (err)
1819 return err;
1820
1821 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
1822 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1823}
1824
1825static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
1826{
1827 struct adv_info *adv, *n;
b338d917 1828 int err = 0;
cba6b758
LAD		 1829
1830 if (ext_adv_capable(hdev))
1831 /* Remove all existing sets */
b338d917
BG		 1832 err = hci_clear_adv_sets_sync(hdev, sk);
1833 if (ext_adv_capable(hdev))
1834 return err;
cba6b758
LAD		 1835
1836 /* This is safe as long as there is no command send while the lock is
1837 * held.
1838 */
1839 hci_dev_lock(hdev);
1840
1841 /* Cleanup non-ext instances */
1842 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1843 u8 instance = adv->instance;
1844 int err;
1845
1846 if (!(force || adv->timeout))
1847 continue;
1848
1849 err = hci_remove_adv_instance(hdev, instance);
1850 if (!err)
1851 mgmt_advertising_removed(sk, hdev, instance);
1852 }
1853
1854 hci_dev_unlock(hdev);
1855
1856 return 0;
1857}
1858
1859static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
1860 struct sock *sk)
1861{
b338d917 1862 int err = 0;
cba6b758
LAD		 1863
1864 /* If we use extended advertising, instance has to be removed first. */
1865 if (ext_adv_capable(hdev))
b338d917
BG		 1866 err = hci_remove_ext_adv_instance_sync(hdev, instance, sk);
1867 if (ext_adv_capable(hdev))
1868 return err;
cba6b758
LAD		 1869
1870 /* This is safe as long as there is no command send while the lock is
1871 * held.
1872 */
1873 hci_dev_lock(hdev);
1874
1875 err = hci_remove_adv_instance(hdev, instance);
1876 if (!err)
1877 mgmt_advertising_removed(sk, hdev, instance);
1878
1879 hci_dev_unlock(hdev);
1880
1881 return err;
1882}
1883
1884/* For a single instance:
1885 * - force == true: The instance will be removed even when its remaining
1886 * lifetime is not zero.
1887 * - force == false: the instance will be deactivated but kept stored unless
1888 * the remaining lifetime is zero.
1889 *
1890 * For instance == 0x00:
1891 * - force == true: All instances will be removed regardless of their timeout
1892 * setting.
1893 * - force == false: Only instances that have a timeout will be removed.
1894 */
1895int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
1896 u8 instance, bool force)
1897{
1898 struct adv_info *next = NULL;
1899 int err;
1900
1901 /* Cancel any timeout concerning the removed instance(s). */
1902 if (!instance || hdev->cur_adv_instance == instance)
1903 cancel_adv_timeout(hdev);
1904
1905 /* Get the next instance to advertise BEFORE we remove
1906 * the current one. This can be the same instance again
1907 * if there is only one instance.
1908 */
1909 if (hdev->cur_adv_instance == instance)
1910 next = hci_get_next_instance(hdev, instance);
1911
1912 if (!instance) {
1913 err = hci_clear_adv_sync(hdev, sk, force);
1914 if (err)
1915 return err;
1916 } else {
1917 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1918
1919 if (force || (adv && adv->timeout && !adv->remaining_time)) {
1920 /* Don't advertise a removed instance. */
1921 if (next && next->instance == instance)
1922 next = NULL;
1923
1924 err = hci_remove_adv_sync(hdev, instance, sk);
1925 if (err)
1926 return err;
1927 }
1928 }
1929
1930 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
1931 return 0;
1932
1933 if (next && !ext_adv_capable(hdev))
1934 hci_schedule_adv_instance_sync(hdev, next->instance, false);
1935
1936 return 0;
1937}
1938
47db6b42
BG		 1939int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
1940{
1941 struct hci_cp_read_rssi cp;
1942
1943 cp.handle = handle;
1944 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
1945 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1946}
1947
5a750137
BG		 1948int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
1949{
1950 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
1951 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
1952}
1953
47db6b42
BG		 1954int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
1955{
1956 struct hci_cp_read_tx_power cp;
1957
1958 cp.handle = handle;
1959 cp.type = type;
1960 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
1961 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1962}
1963
cba6b758
LAD		 1964int hci_disable_advertising_sync(struct hci_dev *hdev)
1965{
1966 u8 enable = 0x00;
b338d917 1967 int err = 0;
cba6b758 1968
ad383c2c
LAD		 1969 /* If controller is not advertising we are done. */
1970 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
1971 return 0;
1972
cba6b758 1973 if (ext_adv_capable(hdev))
b338d917
BG		 1974 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1975 if (ext_adv_capable(hdev))
1976 return err;
cba6b758
LAD		 1977
1978 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1979 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1980}
e8907f76
LAD		 1981
1982static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
1983 u8 filter_dup)
1984{
1985 struct hci_cp_le_set_ext_scan_enable cp;
1986
1987 memset(&cp, 0, sizeof(cp));
1988 cp.enable = val;
b338d917
BG		 1989
1990 if (hci_dev_test_flag(hdev, HCI_MESH))
1991 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
1992 else
1993 cp.filter_dup = filter_dup;
e8907f76
LAD		 1994
1995 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
1996 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1997}
1998
1999static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
2000 u8 filter_dup)
2001{
2002 struct hci_cp_le_set_scan_enable cp;
2003
2004 if (use_ext_scan(hdev))
2005 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
2006
2007 memset(&cp, 0, sizeof(cp));
2008 cp.enable = val;
b338d917
BG		 2009
2010 if (val && hci_dev_test_flag(hdev, HCI_MESH))
2011 cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
2012 else
2013 cp.filter_dup = filter_dup;
e8907f76
LAD		 2014
2015 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
2016 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2017}
2018
2019static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
2020{
ad383c2c
LAD		 2021 if (!use_ll_privacy(hdev))
2022 return 0;
2023
2024 /* If controller is not/already resolving we are done. */
2025 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
e8907f76
LAD		 2026 return 0;
2027
2028 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
2029 sizeof(val), &val, HCI_CMD_TIMEOUT);
2030}
2031
27592ca1 2032static int hci_scan_disable_sync(struct hci_dev *hdev)
e8907f76
LAD		 2033{
2034 int err;
2035
2036 /* If controller is not scanning we are done. */
2037 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
2038 return 0;
2039
2040 if (hdev->scanning_paused) {
2041 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2042 return 0;
2043 }
2044
e8907f76
LAD		 2045 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
2046 if (err) {
2047 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
2048 return err;
2049 }
2050
e8907f76
LAD		 2051 return err;
2052}
2053
2054static bool scan_use_rpa(struct hci_dev *hdev)
2055{
2056 return hci_dev_test_flag(hdev, HCI_PRIVACY);
2057}
2058
2059static void hci_start_interleave_scan(struct hci_dev *hdev)
2060{
2061 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
2062 queue_delayed_work(hdev->req_workqueue,
2063 &hdev->interleave_scan, 0);
2064}
2065
2066static bool is_interleave_scanning(struct hci_dev *hdev)
2067{
2068 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
2069}
2070
2071static void cancel_interleave_scan(struct hci_dev *hdev)
2072{
2073 bt_dev_dbg(hdev, "cancelling interleave scan");
2074
2075 cancel_delayed_work_sync(&hdev->interleave_scan);
2076
2077 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
2078}
2079
2080/* Return true if interleave_scan wasn't started until exiting this function,
2081 * otherwise, return false
2082 */
2083static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
2084{
2085 /* Do interleaved scan only if all of the following are true:
2086 * - There is at least one ADV monitor
2087 * - At least one pending LE connection or one device to be scanned for
2088 * - Monitor offloading is not supported
2089 * If so, we should alternate between allowlist scan and one without
2090 * any filters to save power.
2091 */
2092 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
2093 !(list_empty(&hdev->pend_le_conns) &&
2094 list_empty(&hdev->pend_le_reports)) &&
2095 hci_get_adv_monitor_offload_ext(hdev) ==
2096 HCI_ADV_MONITOR_EXT_NONE;
2097 bool is_interleaving = is_interleave_scanning(hdev);
2098
2099 if (use_interleaving && !is_interleaving) {
2100 hci_start_interleave_scan(hdev);
2101 bt_dev_dbg(hdev, "starting interleave scan");
2102 return true;
2103 }
2104
2105 if (!use_interleaving && is_interleaving)
2106 cancel_interleave_scan(hdev);
2107
2108 return false;
2109}
2110
2111/* Removes connection to resolve list if needed.*/
2112static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
2113 bdaddr_t *bdaddr, u8 bdaddr_type)
2114{
2115 struct hci_cp_le_del_from_resolv_list cp;
2116 struct bdaddr_list_with_irk *entry;
2117
ad383c2c 2118 if (!use_ll_privacy(hdev))
e8907f76
LAD		 2119 return 0;
2120
2121 /* Check if the IRK has been programmed */
2122 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
2123 bdaddr_type);
2124 if (!entry)
2125 return 0;
2126
2127 cp.bdaddr_type = bdaddr_type;
2128 bacpy(&cp.bdaddr, bdaddr);
2129
2130 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
2131 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2132}
2133
2134static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
2135 bdaddr_t *bdaddr, u8 bdaddr_type)
2136{
2137 struct hci_cp_le_del_from_accept_list cp;
2138 int err;
2139
2140 /* Check if device is on accept list before removing it */
2141 if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
2142 return 0;
2143
2144 cp.bdaddr_type = bdaddr_type;
2145 bacpy(&cp.bdaddr, bdaddr);
2146
ad383c2c
LAD		 2147 /* Ignore errors when removing from resolving list as that is likely
2148 * that the device was never added.
2149 */
2150 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
2151
e8907f76
LAD		 2152 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
2153 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2154 if (err) {
2155 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
2156 return err;
2157 }
2158
2159 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
2160 cp.bdaddr_type);
2161
ad383c2c 2162 return 0;
e8907f76
LAD		 2163}
2164
195ef75e
PV		 2165struct conn_params {
2166 bdaddr_t addr;
2167 u8 addr_type;
2168 hci_conn_flags_t flags;
2169 u8 privacy_mode;
2170};
2171
cf75ad8b
LAD		 2172/* Adds connection to resolve list if needed.
2173 * Setting params to NULL programs local hdev->irk
2174 */
e8907f76 2175static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
195ef75e 2176 struct conn_params *params)
e8907f76
LAD		 2177{
2178 struct hci_cp_le_add_to_resolv_list cp;
2179 struct smp_irk *irk;
2180 struct bdaddr_list_with_irk *entry;
195ef75e 2181 struct hci_conn_params *p;
e8907f76 2182
ad383c2c 2183 if (!use_ll_privacy(hdev))
e8907f76
LAD		 2184 return 0;
2185
cf75ad8b
LAD		 2186 /* Attempt to program local identity address, type and irk if params is
2187 * NULL.
2188 */
2189 if (!params) {
2190 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
2191 return 0;
2192
2193 hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
2194 memcpy(cp.peer_irk, hdev->irk, 16);
2195 goto done;
2196 }
2197
e8907f76
LAD		 2198 irk = hci_find_irk_by_addr(hdev, &params->addr, params->addr_type);
2199 if (!irk)
2200 return 0;
2201
2202 /* Check if the IK has _not_ been programmed yet. */
2203 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
2204 &params->addr,
2205 params->addr_type);
2206 if (entry)
2207 return 0;
2208
2209 cp.bdaddr_type = params->addr_type;
2210 bacpy(&cp.bdaddr, &params->addr);
2211 memcpy(cp.peer_irk, irk->val, 16);
2212
0900b1c6
LAD		 2213 /* Default privacy mode is always Network */
2214 params->privacy_mode = HCI_NETWORK_PRIVACY;
2215
195ef75e
PV		 2216 rcu_read_lock();
2217 p = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2218 &params->addr, params->addr_type);
2219 if (!p)
2220 p = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2221 &params->addr, params->addr_type);
2222 if (p)
2223 WRITE_ONCE(p->privacy_mode, HCI_NETWORK_PRIVACY);
2224 rcu_read_unlock();
2225
cf75ad8b 2226done:
e8907f76
LAD		 2227 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
2228 memcpy(cp.local_irk, hdev->irk, 16);
2229 else
2230 memset(cp.local_irk, 0, 16);
2231
2232 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
2233 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2234}
2235
853b70b5
LAD		 2236/* Set Device Privacy Mode. */
2237static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
195ef75e 2238 struct conn_params *params)
853b70b5
LAD		 2239{
2240 struct hci_cp_le_set_privacy_mode cp;
2241 struct smp_irk *irk;
2242
2243 /* If device privacy mode has already been set there is nothing to do */
2244 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
2245 return 0;
2246
2247 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
2248 * indicates that LL Privacy has been enabled and
2249 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
2250 */
e1cff700 2251 if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
853b70b5
LAD		 2252 return 0;
2253
2254 irk = hci_find_irk_by_addr(hdev, &params->addr, params->addr_type);
2255 if (!irk)
2256 return 0;
2257
2258 memset(&cp, 0, sizeof(cp));
2259 cp.bdaddr_type = irk->addr_type;
2260 bacpy(&cp.bdaddr, &irk->bdaddr);
2261 cp.mode = HCI_DEVICE_PRIVACY;
2262
195ef75e
PV		 2263 /* Note: params->privacy_mode is not updated since it is a copy */
2264
853b70b5
LAD		 2265 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
2266 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2267}
2268
e8907f76 2269/* Adds connection to allow list if needed, if the device uses RPA (has IRK)
853b70b5
LAD		 2270 * this attempts to program the device in the resolving list as well and
2271 * properly set the privacy mode.
e8907f76
LAD		 2272 */
2273static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
195ef75e 2274 struct conn_params *params,
ad383c2c 2275 u8 *num_entries)
e8907f76
LAD		 2276{
2277 struct hci_cp_le_add_to_accept_list cp;
2278 int err;
2279
3b420553
LAD		 2280 /* During suspend, only wakeable devices can be in acceptlist */
2281 if (hdev->suspended &&
e1cff700 2282 !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
3b420553
LAD		 2283 return 0;
2284
e8907f76
LAD		 2285 /* Select filter policy to accept all advertising */
2286 if (*num_entries >= hdev->le_accept_list_size)
2287 return -ENOSPC;
2288
2289 /* Accept list can not be used with RPAs */
ad383c2c 2290 if (!use_ll_privacy(hdev) &&
3b420553 2291 hci_find_irk_by_addr(hdev, &params->addr, params->addr_type))
e8907f76 2292 return -EINVAL;
e8907f76 2293
ad383c2c
LAD		 2294 /* Attempt to program the device in the resolving list first to avoid
2295 * having to rollback in case it fails since the resolving list is
2296 * dynamic it can probably be smaller than the accept list.
2297 */
2298 err = hci_le_add_resolve_list_sync(hdev, params);
2299 if (err) {
2300 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
2301 return err;
2302 }
2303
853b70b5
LAD		 2304 /* Set Privacy Mode */
2305 err = hci_le_set_privacy_mode_sync(hdev, params);
2306 if (err) {
2307 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
2308 return err;
2309 }
2310
2311 /* Check if already in accept list */
2312 if (hci_bdaddr_list_lookup(&hdev->le_accept_list, &params->addr,
2313 params->addr_type))
2314 return 0;
2315
e8907f76
LAD		 2316 *num_entries += 1;
2317 cp.bdaddr_type = params->addr_type;
2318 bacpy(&cp.bdaddr, &params->addr);
2319
2320 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
2321 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2322 if (err) {
2323 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
ad383c2c
LAD		 2324 /* Rollback the device from the resolving list */
2325 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
e8907f76
LAD		 2326 return err;
2327 }
2328
2329 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
2330 cp.bdaddr_type);
2331
ad383c2c
LAD		 2332 return 0;
2333}
2334
182ee45d 2335/* This function disables/pause all advertising instances */
ad383c2c
LAD		 2336static int hci_pause_advertising_sync(struct hci_dev *hdev)
2337{
2338 int err;
182ee45d 2339 int old_state;
ad383c2c 2340
9446bdde
LAD		 2341 /* If already been paused there is nothing to do. */
2342 if (hdev->advertising_paused)
ad383c2c
LAD		 2343 return 0;
2344
182ee45d
LAD		 2345 bt_dev_dbg(hdev, "Pausing directed advertising");
2346
2347 /* Stop directed advertising */
2348 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
2349 if (old_state) {
2350 /* When discoverable timeout triggers, then just make sure
2351 * the limited discoverable flag is cleared. Even in the case
2352 * of a timeout triggered from general discoverable, it is
2353 * safe to unconditionally clear the flag.
2354 */
2355 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
2356 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
2357 hdev->discov_timeout = 0;
2358 }
2359
ad383c2c
LAD		 2360 bt_dev_dbg(hdev, "Pausing advertising instances");
2361
2362 /* Call to disable any advertisements active on the controller.
2363 * This will succeed even if no advertisements are configured.
2364 */
2365 err = hci_disable_advertising_sync(hdev);
2366 if (err)
2367 return err;
2368
2369 /* If we are using software rotation, pause the loop */
2370 if (!ext_adv_capable(hdev))
2371 cancel_adv_timeout(hdev);
2372
2373 hdev->advertising_paused = true;
182ee45d 2374 hdev->advertising_old_state = old_state;
ad383c2c
LAD		 2375
2376 return 0;
e8907f76
LAD		 2377}
2378
182ee45d 2379/* This function enables all user advertising instances */
ad383c2c
LAD		 2380static int hci_resume_advertising_sync(struct hci_dev *hdev)
2381{
2382 struct adv_info *adv, *tmp;
2383 int err;
2384
2385 /* If advertising has not been paused there is nothing to do. */
2386 if (!hdev->advertising_paused)
2387 return 0;
2388
182ee45d
LAD		 2389 /* Resume directed advertising */
2390 hdev->advertising_paused = false;
2391 if (hdev->advertising_old_state) {
2392 hci_dev_set_flag(hdev, HCI_ADVERTISING);
182ee45d
LAD		 2393 hdev->advertising_old_state = 0;
2394 }
2395
ad383c2c
LAD		 2396 bt_dev_dbg(hdev, "Resuming advertising instances");
2397
2398 if (ext_adv_capable(hdev)) {
2399 /* Call for each tracked instance to be re-enabled */
2400 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
2401 err = hci_enable_ext_advertising_sync(hdev,
2402 adv->instance);
2403 if (!err)
2404 continue;
2405
2406 /* If the instance cannot be resumed remove it */
2407 hci_remove_ext_adv_instance_sync(hdev, adv->instance,
2408 NULL);
2409 }
2410 } else {
2411 /* Schedule for most recent instance to be restarted and begin
2412 * the software rotation loop
2413 */
2414 err = hci_schedule_adv_instance_sync(hdev,
2415 hdev->cur_adv_instance,
2416 true);
2417 }
2418
2419 hdev->advertising_paused = false;
2420
2421 return err;
2422}
2423
3c44a431
ZJ		 2424static int hci_pause_addr_resolution(struct hci_dev *hdev)
2425{
2426 int err;
2427
2428 if (!use_ll_privacy(hdev))
2429 return 0;
2430
2431 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
2432 return 0;
2433
2434 /* Cannot disable addr resolution if scanning is enabled or
2435 * when initiating an LE connection.
2436 */
2437 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2438 hci_lookup_le_connect(hdev)) {
2439 bt_dev_err(hdev, "Command not allowed when scan/LE connect");
2440 return -EPERM;
2441 }
2442
2443 /* Cannot disable addr resolution if advertising is enabled. */
2444 err = hci_pause_advertising_sync(hdev);
2445 if (err) {
2446 bt_dev_err(hdev, "Pause advertising failed: %d", err);
2447 return err;
2448 }
2449
2450 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2451 if (err)
2452 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
2453 err);
2454
2455 /* Return if address resolution is disabled and RPA is not used. */
2456 if (!err && scan_use_rpa(hdev))
ae051b04 2457 return 0;
3c44a431
ZJ		 2458
2459 hci_resume_advertising_sync(hdev);
2460 return err;
2461}
2462
f892244b
BG		 2463struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
2464 bool extended, struct sock *sk)
2465{
2466 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
2467 HCI_OP_READ_LOCAL_OOB_DATA;
2468
2469 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
2470}
2471
195ef75e
PV		 2472static struct conn_params *conn_params_copy(struct list_head *list, size_t *n)
2473{
2474 struct hci_conn_params *params;
2475 struct conn_params *p;
2476 size_t i;
2477
2478 rcu_read_lock();
2479
2480 i = 0;
2481 list_for_each_entry_rcu(params, list, action)
2482 ++i;
2483 *n = i;
2484
2485 rcu_read_unlock();
2486
2487 p = kvcalloc(*n, sizeof(struct conn_params), GFP_KERNEL);
2488 if (!p)
2489 return NULL;
2490
2491 rcu_read_lock();
2492
2493 i = 0;
2494 list_for_each_entry_rcu(params, list, action) {
2495 /* Racing adds are handled in next scan update */
2496 if (i >= *n)
2497 break;
2498
2499 /* No hdev->lock, but: addr, addr_type are immutable.
2500 * privacy_mode is only written by us or in
2501 * hci_cc_le_set_privacy_mode that we wait for.
2502 * We should be idempotent so MGMT updating flags
2503 * while we are processing is OK.
2504 */
2505 bacpy(&p[i].addr, &params->addr);
2506 p[i].addr_type = params->addr_type;
2507 p[i].flags = READ_ONCE(params->flags);
2508 p[i].privacy_mode = READ_ONCE(params->privacy_mode);
2509 ++i;
2510 }
2511
2512 rcu_read_unlock();
2513
2514 *n = i;
2515 return p;
2516}
2517
ad383c2c
LAD		 2518/* Device must not be scanning when updating the accept list.
2519 *
2520 * Update is done using the following sequence:
2521 *
2522 * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
2523 * Remove Devices From Accept List ->
2524 * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
2525 * Add Devices to Accept List ->
2526 * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
2527 * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
2528 * Enable Scanning
2529 *
2530 * In case of failure advertising shall be restored to its original state and
2531 * return would disable accept list since either accept or resolving list could
2532 * not be programmed.
2533 *
2534 */
e8907f76
LAD		 2535static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
2536{
195ef75e 2537 struct conn_params *params;
e8907f76
LAD		 2538 struct bdaddr_list *b, *t;
2539 u8 num_entries = 0;
2540 bool pend_conn, pend_report;
80740ebb 2541 u8 filter_policy;
195ef75e 2542 size_t i, n;
ad383c2c
LAD		 2543 int err;
2544
3c44a431 2545 /* Pause advertising if resolving list can be used as controllers
ad383c2c 2546 * cannot accept resolving list modifications while advertising.
e8907f76 2547 */
ad383c2c
LAD		 2548 if (use_ll_privacy(hdev)) {
2549 err = hci_pause_advertising_sync(hdev);
2550 if (err) {
2551 bt_dev_err(hdev, "pause advertising failed: %d", err);
2552 return 0x00;
2553 }
2554 }
e8907f76 2555
ad383c2c
LAD		 2556 /* Disable address resolution while reprogramming accept list since
2557 * devices that do have an IRK will be programmed in the resolving list
2558 * when LL Privacy is enabled.
2559 */
2560 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
2561 if (err) {
2562 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
2563 goto done;
2564 }
e8907f76
LAD		 2565
2566 /* Go through the current accept list programmed into the
6828b583
LAD		 2567 * controller one by one and check if that address is connected or is
2568 * still in the list of pending connections or list of devices to
e8907f76
LAD		 2569 * report. If not present in either list, then remove it from
2570 * the controller.
2571 */
2572 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
6828b583
LAD		 2573 if (hci_conn_hash_lookup_le(hdev, &b->bdaddr, b->bdaddr_type))
2574 continue;
2575
195ef75e 2576 /* Pointers not dereferenced, no locks needed */
e8907f76
LAD		 2577 pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
2578 &b->bdaddr,
2579 b->bdaddr_type);
2580 pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
2581 &b->bdaddr,
2582 b->bdaddr_type);
2583
2584 /* If the device is not likely to connect or report,
2585 * remove it from the acceptlist.
2586 */
2587 if (!pend_conn && !pend_report) {
2588 hci_le_del_accept_list_sync(hdev, &b->bdaddr,
2589 b->bdaddr_type);
2590 continue;
2591 }
2592
e8907f76
LAD		 2593 num_entries++;
2594 }
2595
2596 /* Since all no longer valid accept list entries have been
2597 * removed, walk through the list of pending connections
2598 * and ensure that any new device gets programmed into
2599 * the controller.
2600 *
2601 * If the list of the devices is larger than the list of
2602 * available accept list entries in the controller, then
2603 * just abort and return filer policy value to not use the
2604 * accept list.
195ef75e
PV		 2605 *
2606 * The list and params may be mutated while we wait for events,
2607 * so make a copy and iterate it.
e8907f76 2608 */
195ef75e
PV		 2609
2610 params = conn_params_copy(&hdev->pend_le_conns, &n);
2611 if (!params) {
2612 err = -ENOMEM;
2613 goto done;
2614 }
2615
2616 for (i = 0; i < n; ++i) {
2617 err = hci_le_add_accept_list_sync(hdev, &params[i],
2618 &num_entries);
2619 if (err) {
2620 kvfree(params);
ad383c2c 2621 goto done;
195ef75e 2622 }
e8907f76
LAD		 2623 }
2624
195ef75e
PV		 2625 kvfree(params);
2626
e8907f76
LAD		 2627 /* After adding all new pending connections, walk through
2628 * the list of pending reports and also add these to the
2629 * accept list if there is still space. Abort if space runs out.
2630 */
195ef75e
PV		 2631
2632 params = conn_params_copy(&hdev->pend_le_reports, &n);
2633 if (!params) {
2634 err = -ENOMEM;
2635 goto done;
2636 }
2637
2638 for (i = 0; i < n; ++i) {
2639 err = hci_le_add_accept_list_sync(hdev, &params[i],
2640 &num_entries);
2641 if (err) {
2642 kvfree(params);
ad383c2c 2643 goto done;
195ef75e 2644 }
e8907f76
LAD		 2645 }
2646
195ef75e
PV		 2647 kvfree(params);
2648
e8907f76
LAD		 2649 /* Use the allowlist unless the following conditions are all true:
2650 * - We are not currently suspending
2651 * - There are 1 or more ADV monitors registered and it's not offloaded
2652 * - Interleaved scanning is not currently using the allowlist
2653 */
2654 if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
2655 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
2656 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
ad383c2c
LAD		 2657 err = -EINVAL;
2658
2659done:
80740ebb
LAD		 2660 filter_policy = err ? 0x00 : 0x01;
2661
ad383c2c
LAD		 2662 /* Enable address resolution when LL Privacy is enabled. */
2663 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2664 if (err)
2665 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
2666
2667 /* Resume advertising if it was paused */
2668 if (use_ll_privacy(hdev))
2669 hci_resume_advertising_sync(hdev);
e8907f76
LAD		 2670
2671 /* Select filter policy to use accept list */
80740ebb 2672 return filter_policy;
e8907f76
LAD		 2673}
2674
2675/* Returns true if an le connection is in the scanning state */
2676static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
2677{
2678 struct hci_conn_hash *h = &hdev->conn_hash;
2679 struct hci_conn *c;
2680
2681 rcu_read_lock();
2682
2683 list_for_each_entry_rcu(c, &h->list, list) {
2684 if (c->type == LE_LINK && c->state == BT_CONNECT &&
2685 test_bit(HCI_CONN_SCANNING, &c->flags)) {
2686 rcu_read_unlock();
2687 return true;
2688 }
2689 }
2690
2691 rcu_read_unlock();
2692
2693 return false;
2694}
2695
2696static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
2697 u16 interval, u16 window,
2698 u8 own_addr_type, u8 filter_policy)
2699{
2700 struct hci_cp_le_set_ext_scan_params *cp;
2701 struct hci_cp_le_scan_phy_params *phy;
2702 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
2703 u8 num_phy = 0;
2704
2705 cp = (void *)data;
2706 phy = (void *)cp->data;
2707
2708 memset(data, 0, sizeof(data));
2709
2710 cp->own_addr_type = own_addr_type;
2711 cp->filter_policy = filter_policy;
2712
2713 if (scan_1m(hdev) || scan_2m(hdev)) {
2714 cp->scanning_phys |= LE_SCAN_PHY_1M;
2715
2716 phy->type = type;
2717 phy->interval = cpu_to_le16(interval);
2718 phy->window = cpu_to_le16(window);
2719
2720 num_phy++;
2721 phy++;
2722 }
2723
2724 if (scan_coded(hdev)) {
2725 cp->scanning_phys |= LE_SCAN_PHY_CODED;
2726
2727 phy->type = type;
2728 phy->interval = cpu_to_le16(interval);
2729 phy->window = cpu_to_le16(window);
2730
2731 num_phy++;
2732 phy++;
2733 }
2734
2735 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
2736 sizeof(*cp) + sizeof(*phy) * num_phy,
2737 data, HCI_CMD_TIMEOUT);
2738}
2739
2740static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
2741 u16 interval, u16 window,
2742 u8 own_addr_type, u8 filter_policy)
2743{
2744 struct hci_cp_le_set_scan_param cp;
2745
2746 if (use_ext_scan(hdev))
2747 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
2748 window, own_addr_type,
2749 filter_policy);
2750
2751 memset(&cp, 0, sizeof(cp));
2752 cp.type = type;
2753 cp.interval = cpu_to_le16(interval);
2754 cp.window = cpu_to_le16(window);
2755 cp.own_address_type = own_addr_type;
2756 cp.filter_policy = filter_policy;
2757
2758 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
2759 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2760}
2761
2762static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
abfeea47
LAD		 2763 u16 window, u8 own_addr_type, u8 filter_policy,
2764 u8 filter_dup)
e8907f76
LAD		 2765{
2766 int err;
2767
2768 if (hdev->scanning_paused) {
2769 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2770 return 0;
2771 }
2772
e8907f76
LAD		 2773 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
2774 own_addr_type, filter_policy);
2775 if (err)
2776 return err;
2777
abfeea47 2778 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
e8907f76
LAD		 2779}
2780
27592ca1 2781static int hci_passive_scan_sync(struct hci_dev *hdev)
e8907f76
LAD		 2782{
2783 u8 own_addr_type;
2784 u8 filter_policy;
2785 u16 window, interval;
b338d917 2786 u8 filter_dups = LE_SCAN_FILTER_DUP_ENABLE;
ad383c2c 2787 int err;
e8907f76
LAD		 2788
2789 if (hdev->scanning_paused) {
2790 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2791 return 0;
2792 }
2793
ad383c2c
LAD		 2794 err = hci_scan_disable_sync(hdev);
2795 if (err) {
2796 bt_dev_err(hdev, "disable scanning failed: %d", err);
2797 return err;
2798 }
2799
e8907f76
LAD		 2800 /* Set require_privacy to false since no SCAN_REQ are send
2801 * during passive scanning. Not using an non-resolvable address
2802 * here is important so that peer devices using direct
2803 * advertising with our address will be correctly reported
2804 * by the controller.
2805 */
2806 if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
2807 &own_addr_type))
2808 return 0;
2809
2810 if (hdev->enable_advmon_interleave_scan &&
2811 hci_update_interleaved_scan_sync(hdev))
2812 return 0;
2813
2814 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
ad383c2c 2815
e8907f76
LAD		 2816 /* Adding or removing entries from the accept list must
2817 * happen before enabling scanning. The controller does
2818 * not allow accept list modification while scanning.
2819 */
2820 filter_policy = hci_update_accept_list_sync(hdev);
2821
2822 /* When the controller is using random resolvable addresses and
2823 * with that having LE privacy enabled, then controllers with
2824 * Extended Scanner Filter Policies support can now enable support
2825 * for handling directed advertising.
2826 *
2827 * So instead of using filter polices 0x00 (no acceptlist)
2828 * and 0x01 (acceptlist enabled) use the new filter policies
2829 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
2830 */
2831 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
2832 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
2833 filter_policy |= 0x02;
2834
2835 if (hdev->suspended) {
2836 window = hdev->le_scan_window_suspend;
2837 interval = hdev->le_scan_int_suspend;
e8907f76
LAD		 2838 } else if (hci_is_le_conn_scanning(hdev)) {
2839 window = hdev->le_scan_window_connect;
2840 interval = hdev->le_scan_int_connect;
2841 } else if (hci_is_adv_monitoring(hdev)) {
2842 window = hdev->le_scan_window_adv_monitor;
2843 interval = hdev->le_scan_int_adv_monitor;
2844 } else {
2845 window = hdev->le_scan_window;
2846 interval = hdev->le_scan_interval;
2847 }
2848
b338d917
BG		 2849 /* Disable all filtering for Mesh */
2850 if (hci_dev_test_flag(hdev, HCI_MESH)) {
2851 filter_policy = 0;
2852 filter_dups = LE_SCAN_FILTER_DUP_DISABLE;
2853 }
2854
e8907f76
LAD		 2855 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
2856
2857 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
b338d917 2858 own_addr_type, filter_policy, filter_dups);
e8907f76
LAD		 2859}
2860
2861/* This function controls the passive scanning based on hdev->pend_le_conns
2862 * list. If there are pending LE connection we start the background scanning,
ad383c2c
LAD		 2863 * otherwise we stop it in the following sequence:
2864 *
2865 * If there are devices to scan:
2866 *
2867 * Disable Scanning -> Update Accept List ->
2868 * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
2869 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
2870 * Enable Scanning
2871 *
2872 * Otherwise:
2873 *
2874 * Disable Scanning
e8907f76
LAD		 2875 */
2876int hci_update_passive_scan_sync(struct hci_dev *hdev)
2877{
2878 int err;
2879
2880 if (!test_bit(HCI_UP, &hdev->flags) ||
2881 test_bit(HCI_INIT, &hdev->flags) ||
2882 hci_dev_test_flag(hdev, HCI_SETUP) ||
2883 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2884 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2885 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2886 return 0;
2887
2888 /* No point in doing scanning if LE support hasn't been enabled */
2889 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2890 return 0;
2891
2892 /* If discovery is active don't interfere with it */
2893 if (hdev->discovery.state != DISCOVERY_STOPPED)
2894 return 0;
2895
2896 /* Reset RSSI and UUID filters when starting background scanning
2897 * since these filters are meant for service discovery only.
2898 *
2899 * The Start Discovery and Start Service Discovery operations
2900 * ensure to set proper values for RSSI threshold and UUID
2901 * filter list. So it is safe to just reset them here.
2902 */
2903 hci_discovery_filter_clear(hdev);
2904
2905 bt_dev_dbg(hdev, "ADV monitoring is %s",
2906 hci_is_adv_monitoring(hdev) ? "on" : "off");
2907
b338d917
BG		 2908 if (!hci_dev_test_flag(hdev, HCI_MESH) &&
2909 list_empty(&hdev->pend_le_conns) &&
e8907f76 2910 list_empty(&hdev->pend_le_reports) &&
eca0ae4a
LAD		 2911 !hci_is_adv_monitoring(hdev) &&
2912 !hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
e8907f76
LAD		 2913 /* If there is no pending LE connections or devices
2914 * to be scanned for or no ADV monitors, we should stop the
2915 * background scanning.
2916 */
2917
2918 bt_dev_dbg(hdev, "stopping background scanning");
2919
ad383c2c 2920 err = hci_scan_disable_sync(hdev);
e8907f76
LAD		 2921 if (err)
2922 bt_dev_err(hdev, "stop background scanning failed: %d",
2923 err);
2924 } else {
2925 /* If there is at least one pending LE connection, we should
2926 * keep the background scan running.
2927 */
2928
2929 /* If controller is connecting, we should not start scanning
2930 * since some controllers are not able to scan and connect at
2931 * the same time.
2932 */
2933 if (hci_lookup_le_connect(hdev))
2934 return 0;
2935
e8907f76
LAD		 2936 bt_dev_dbg(hdev, "start background scanning");
2937
2938 err = hci_passive_scan_sync(hdev);
2939 if (err)
2940 bt_dev_err(hdev, "start background scanning failed: %d",
2941 err);
2942 }
2943
2944 return err;
2945}
ad383c2c 2946
bb876725
BG		 2947static int update_scan_sync(struct hci_dev *hdev, void *data)
2948{
2949 return hci_update_scan_sync(hdev);
2950}
2951
2952int hci_update_scan(struct hci_dev *hdev)
2953{
2954 return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL);
2955}
2956
ad383c2c
LAD		 2957static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
2958{
2959 return hci_update_passive_scan_sync(hdev);
2960}
2961
2962int hci_update_passive_scan(struct hci_dev *hdev)
2963{
5bee2fd6
LAD		 2964 /* Only queue if it would have any effect */
2965 if (!test_bit(HCI_UP, &hdev->flags) ||
2966 test_bit(HCI_INIT, &hdev->flags) ||
2967 hci_dev_test_flag(hdev, HCI_SETUP) ||
2968 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2969 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2970 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2971 return 0;
2972
ad383c2c
LAD		 2973 return hci_cmd_sync_queue(hdev, update_passive_scan_sync, NULL, NULL);
2974}
cf75ad8b 2975
2f2eb0c9 2976int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
cf75ad8b 2977{
2f2eb0c9
BG		 2978 int err;
2979
cf75ad8b
LAD		 2980 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
2981 return 0;
2982
2f2eb0c9 2983 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
cf75ad8b 2984 sizeof(val), &val, HCI_CMD_TIMEOUT);
2f2eb0c9
BG		 2985
2986 if (!err) {
2987 if (val) {
2988 hdev->features[1][0] |= LMP_HOST_SC;
2989 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
2990 } else {
2991 hdev->features[1][0] &= ~LMP_HOST_SC;
2992 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
2993 }
2994 }
2995
2996 return err;
cf75ad8b
LAD		 2997}
2998
3244845c 2999int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
cf75ad8b
LAD		 3000{
3001 int err;
3002
3003 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
3004 lmp_host_ssp_capable(hdev))
3005 return 0;
3006
3244845c
BG		 3007 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
3008 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
3009 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3010 }
3011
cf75ad8b
LAD		 3012 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3013 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3014 if (err)
3015 return err;
3016
3017 return hci_write_sc_support_sync(hdev, 0x01);
3018}
3019
d81a494c 3020int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
cf75ad8b
LAD		 3021{
3022 struct hci_cp_write_le_host_supported cp;
3023
3024 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
3025 !lmp_bredr_capable(hdev))
3026 return 0;
3027
3028 /* Check first if we already have the right host state
3029 * (host features set)
3030 */
3031 if (le == lmp_host_le_capable(hdev) &&
3032 simul == lmp_host_le_br_capable(hdev))
3033 return 0;
3034
3035 memset(&cp, 0, sizeof(cp));
3036
3037 cp.le = le;
3038 cp.simul = simul;
3039
3040 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
3041 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3042}
3043
3044static int hci_powered_update_adv_sync(struct hci_dev *hdev)
3045{
3046 struct adv_info *adv, *tmp;
3047 int err;
3048
3049 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
3050 return 0;
3051
3052 /* If RPA Resolution has not been enable yet it means the
3053 * resolving list is empty and we should attempt to program the
3054 * local IRK in order to support using own_addr_type
3055 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
3056 */
3057 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
3058 hci_le_add_resolve_list_sync(hdev, NULL);
3059 hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
3060 }
3061
3062 /* Make sure the controller has a good default for
3063 * advertising data. This also applies to the case
3064 * where BR/EDR was toggled during the AUTO_OFF phase.
3065 */
3066 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
3067 list_empty(&hdev->adv_instances)) {
3068 if (ext_adv_capable(hdev)) {
3069 err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
3070 if (!err)
3071 hci_update_scan_rsp_data_sync(hdev, 0x00);
3072 } else {
3073 err = hci_update_adv_data_sync(hdev, 0x00);
3074 if (!err)
3075 hci_update_scan_rsp_data_sync(hdev, 0x00);
3076 }
3077
3078 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
3079 hci_enable_advertising_sync(hdev);
3080 }
3081
3082 /* Call for each tracked instance to be scheduled */
3083 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
3084 hci_schedule_adv_instance_sync(hdev, adv->instance, true);
3085
3086 return 0;
3087}
3088
3089static int hci_write_auth_enable_sync(struct hci_dev *hdev)
3090{
3091 u8 link_sec;
3092
3093 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
3094 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
3095 return 0;
3096
3097 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
3098 sizeof(link_sec), &link_sec,
3099 HCI_CMD_TIMEOUT);
3100}
3101
353a0249 3102int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
cf75ad8b
LAD		 3103{
3104 struct hci_cp_write_page_scan_activity cp;
3105 u8 type;
3106 int err = 0;
3107
3108 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3109 return 0;
3110
3111 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3112 return 0;
3113
3114 memset(&cp, 0, sizeof(cp));
3115
3116 if (enable) {
3117 type = PAGE_SCAN_TYPE_INTERLACED;
3118
3119 /* 160 msec page scan interval */
3120 cp.interval = cpu_to_le16(0x0100);
3121 } else {
3122 type = hdev->def_page_scan_type;
3123 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
3124 }
3125
3126 cp.window = cpu_to_le16(hdev->def_page_scan_window);
3127
3128 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
3129 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
3130 err = __hci_cmd_sync_status(hdev,
3131 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
3132 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3133 if (err)
3134 return err;
3135 }
3136
3137 if (hdev->page_scan_type != type)
3138 err = __hci_cmd_sync_status(hdev,
3139 HCI_OP_WRITE_PAGE_SCAN_TYPE,
3140 sizeof(type), &type,
3141 HCI_CMD_TIMEOUT);
3142
3143 return err;
3144}
3145
3146static bool disconnected_accept_list_entries(struct hci_dev *hdev)
3147{
3148 struct bdaddr_list *b;
3149
3150 list_for_each_entry(b, &hdev->accept_list, list) {
3151 struct hci_conn *conn;
3152
3153 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
3154 if (!conn)
3155 return true;
3156
3157 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3158 return true;
3159 }
3160
3161 return false;
3162}
3163
3164static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
3165{
3166 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
3167 sizeof(val), &val,
3168 HCI_CMD_TIMEOUT);
3169}
3170
451d95a9 3171int hci_update_scan_sync(struct hci_dev *hdev)
cf75ad8b
LAD		 3172{
3173 u8 scan;
3174
3175 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
3176 return 0;
3177
3178 if (!hdev_is_powered(hdev))
3179 return 0;
3180
3181 if (mgmt_powering_down(hdev))
3182 return 0;
3183
3184 if (hdev->scanning_paused)
3185 return 0;
3186
3187 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
3188 disconnected_accept_list_entries(hdev))
3189 scan = SCAN_PAGE;
3190 else
3191 scan = SCAN_DISABLED;
3192
3193 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
3194 scan |= SCAN_INQUIRY;
3195
3196 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
3197 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
3198 return 0;
3199
3200 return hci_write_scan_enable_sync(hdev, scan);
3201}
3202
6f6ff38a 3203int hci_update_name_sync(struct hci_dev *hdev)
cf75ad8b
LAD		 3204{
3205 struct hci_cp_write_local_name cp;
3206
3207 memset(&cp, 0, sizeof(cp));
3208
3209 memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
3210
3211 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
3212 sizeof(cp), &cp,
3213 HCI_CMD_TIMEOUT);
3214}
3215
3216/* This function perform powered update HCI command sequence after the HCI init
3217 * sequence which end up resetting all states, the sequence is as follows:
3218 *
3219 * HCI_SSP_ENABLED(Enable SSP)
3220 * HCI_LE_ENABLED(Enable LE)
3221 * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
3222 * Update adv data)
3223 * Enable Authentication
3224 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
3225 * Set Name -> Set EIR)
e411443c 3226 * HCI_FORCE_STATIC_ADDR | BDADDR_ANY && !HCI_BREDR_ENABLED (Set Static Address)
cf75ad8b
LAD		 3227 */
3228int hci_powered_update_sync(struct hci_dev *hdev)
3229{
3230 int err;
3231
3232 /* Register the available SMP channels (BR/EDR and LE) only when
3233 * successfully powering on the controller. This late
3234 * registration is required so that LE SMP can clearly decide if
3235 * the public address or static address is used.
3236 */
3237 smp_register(hdev);
3238
3239 err = hci_write_ssp_mode_sync(hdev, 0x01);
3240 if (err)
3241 return err;
3242
3243 err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
3244 if (err)
3245 return err;
3246
3247 err = hci_powered_update_adv_sync(hdev);
3248 if (err)
3249 return err;
3250
3251 err = hci_write_auth_enable_sync(hdev);
3252 if (err)
3253 return err;
3254
3255 if (lmp_bredr_capable(hdev)) {
3256 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
3257 hci_write_fast_connectable_sync(hdev, true);
3258 else
3259 hci_write_fast_connectable_sync(hdev, false);
3260 hci_update_scan_sync(hdev);
3261 hci_update_class_sync(hdev);
3262 hci_update_name_sync(hdev);
3263 hci_update_eir_sync(hdev);
3264 }
3265
e411443c
LAD		 3266 /* If forcing static address is in use or there is no public
3267 * address use the static address as random address (but skip
3268 * the HCI command if the current random address is already the
3269 * static one.
3270 *
3271 * In case BR/EDR has been disabled on a dual-mode controller
3272 * and a static address has been configured, then use that
3273 * address instead of the public BR/EDR address.
3274 */
3275 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3276 (!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3277 !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))) {
3278 if (bacmp(&hdev->static_addr, BDADDR_ANY))
3279 return hci_set_random_addr_sync(hdev,
3280 &hdev->static_addr);
3281 }
3282
cf75ad8b
LAD		 3283 return 0;
3284}
3285
d0b13706
LAD		 3286/**
3287 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
3288 * (BD_ADDR) for a HCI device from
3289 * a firmware node property.
3290 * @hdev: The HCI device
cf75ad8b 3291 *
d0b13706
LAD		 3292 * Search the firmware node for 'local-bd-address'.
3293 *
3294 * All-zero BD addresses are rejected, because those could be properties
3295 * that exist in the firmware tables, but were not updated by the firmware. For
3296 * example, the DTS could define 'local-bd-address', with zero BD addresses.
cf75ad8b 3297 */
d0b13706 3298static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
cf75ad8b 3299{
d0b13706
LAD		 3300 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
3301 bdaddr_t ba;
3302 int ret;
cf75ad8b 3303
d0b13706
LAD		 3304 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
3305 (u8 *)&ba, sizeof(ba));
3306 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
3307 return;
cf75ad8b 3308
d0b13706
LAD		 3309 bacpy(&hdev->public_addr, &ba);
3310}
cf75ad8b 3311
d0b13706
LAD		 3312struct hci_init_stage {
3313 int (*func)(struct hci_dev *hdev);
3314};
cf75ad8b 3315
d0b13706
LAD		 3316/* Run init stage NULL terminated function table */
3317static int hci_init_stage_sync(struct hci_dev *hdev,
3318 const struct hci_init_stage *stage)
3319{
3320 size_t i;
cf75ad8b 3321
d0b13706
LAD		 3322 for (i = 0; stage[i].func; i++) {
3323 int err;
cf75ad8b 3324
d0b13706
LAD		 3325 err = stage[i].func(hdev);
3326 if (err)
3327 return err;
cf75ad8b
LAD		 3328 }
3329
3330 return 0;
3331}
3332
d0b13706
LAD		 3333/* Read Local Version */
3334static int hci_read_local_version_sync(struct hci_dev *hdev)
cf75ad8b 3335{
d0b13706
LAD		 3336 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
3337 0, NULL, HCI_CMD_TIMEOUT);
3338}
cf75ad8b 3339
d0b13706
LAD		 3340/* Read BD Address */
3341static int hci_read_bd_addr_sync(struct hci_dev *hdev)
3342{
3343 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
3344 0, NULL, HCI_CMD_TIMEOUT);
3345}
cf75ad8b 3346
d0b13706
LAD		 3347#define HCI_INIT(_func) \
3348{ \
3349 .func = _func, \
cf75ad8b
LAD		 3350}
3351
d0b13706
LAD		 3352static const struct hci_init_stage hci_init0[] = {
3353 /* HCI_OP_READ_LOCAL_VERSION */
3354 HCI_INIT(hci_read_local_version_sync),
3355 /* HCI_OP_READ_BD_ADDR */
3356 HCI_INIT(hci_read_bd_addr_sync),
3357 {}
3358};
3359
3360int hci_reset_sync(struct hci_dev *hdev)
cf75ad8b 3361{
cf75ad8b
LAD		 3362 int err;
3363
d0b13706 3364 set_bit(HCI_RESET, &hdev->flags);
cf75ad8b 3365
d0b13706
LAD		 3366 err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
3367 HCI_CMD_TIMEOUT);
3368 if (err)
3369 return err;
cf75ad8b 3370
d0b13706
LAD		 3371 return 0;
3372}
cf75ad8b 3373
d0b13706
LAD		 3374static int hci_init0_sync(struct hci_dev *hdev)
3375{
3376 int err;
cf75ad8b 3377
d0b13706
LAD		 3378 bt_dev_dbg(hdev, "");
3379
3380 /* Reset */
3381 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3382 err = hci_reset_sync(hdev);
cf75ad8b
LAD		 3383 if (err)
3384 return err;
3385 }
3386
d0b13706
LAD		 3387 return hci_init_stage_sync(hdev, hci_init0);
3388}
abfeea47 3389
d0b13706
LAD		 3390static int hci_unconf_init_sync(struct hci_dev *hdev)
3391{
3392 int err;
3393
3394 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
cf75ad8b
LAD		 3395 return 0;
3396
d0b13706
LAD		 3397 err = hci_init0_sync(hdev);
3398 if (err < 0)
3399 return err;
cf75ad8b 3400
d0b13706
LAD		 3401 if (hci_dev_test_flag(hdev, HCI_SETUP))
3402 hci_debugfs_create_basic(hdev);
cf75ad8b
LAD		 3403
3404 return 0;
3405}
3406
d0b13706
LAD		 3407/* Read Local Supported Features. */
3408static int hci_read_local_features_sync(struct hci_dev *hdev)
cf75ad8b 3409{
d0b13706
LAD		 3410 /* Not all AMP controllers support this command */
3411 if (hdev->dev_type == HCI_AMP && !(hdev->commands[14] & 0x20))
3412 return 0;
cf75ad8b 3413
d0b13706
LAD		 3414 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
3415 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 3416}
3417
d0b13706
LAD		 3418/* BR Controller init stage 1 command sequence */
3419static const struct hci_init_stage br_init1[] = {
3420 /* HCI_OP_READ_LOCAL_FEATURES */
3421 HCI_INIT(hci_read_local_features_sync),
3422 /* HCI_OP_READ_LOCAL_VERSION */
3423 HCI_INIT(hci_read_local_version_sync),
3424 /* HCI_OP_READ_BD_ADDR */
3425 HCI_INIT(hci_read_bd_addr_sync),
3426 {}
3427};
3428
3429/* Read Local Commands */
3430static int hci_read_local_cmds_sync(struct hci_dev *hdev)
cf75ad8b 3431{
d0b13706
LAD		 3432 /* All Bluetooth 1.2 and later controllers should support the
3433 * HCI command for reading the local supported commands.
3434 *
3435 * Unfortunately some controllers indicate Bluetooth 1.2 support,
3436 * but do not have support for this command. If that is the case,
3437 * the driver can quirk the behavior and skip reading the local
3438 * supported commands.
3439 */
3440 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
3441 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
3442 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
3443 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b 3444
d0b13706 3445 return 0;
cf75ad8b
LAD		 3446}
3447
d0b13706
LAD		 3448/* Read Local AMP Info */
3449static int hci_read_local_amp_info_sync(struct hci_dev *hdev)
cf75ad8b 3450{
d0b13706
LAD		 3451 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_AMP_INFO,
3452 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 3453}
3454
d0b13706
LAD		 3455/* Read Data Blk size */
3456static int hci_read_data_block_size_sync(struct hci_dev *hdev)
cf75ad8b 3457{
d0b13706
LAD		 3458 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DATA_BLOCK_SIZE,
3459 0, NULL, HCI_CMD_TIMEOUT);
3460}
cf75ad8b 3461
d0b13706
LAD		 3462/* Read Flow Control Mode */
3463static int hci_read_flow_control_mode_sync(struct hci_dev *hdev)
3464{
3465 return __hci_cmd_sync_status(hdev, HCI_OP_READ_FLOW_CONTROL_MODE,
3466 0, NULL, HCI_CMD_TIMEOUT);
3467}
cf75ad8b 3468
d0b13706
LAD		 3469/* Read Location Data */
3470static int hci_read_location_data_sync(struct hci_dev *hdev)
3471{
3472 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCATION_DATA,
3473 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 3474}
3475
d0b13706
LAD		 3476/* AMP Controller init stage 1 command sequence */
3477static const struct hci_init_stage amp_init1[] = {
3478 /* HCI_OP_READ_LOCAL_VERSION */
3479 HCI_INIT(hci_read_local_version_sync),
3480 /* HCI_OP_READ_LOCAL_COMMANDS */
3481 HCI_INIT(hci_read_local_cmds_sync),
3482 /* HCI_OP_READ_LOCAL_AMP_INFO */
3483 HCI_INIT(hci_read_local_amp_info_sync),
3484 /* HCI_OP_READ_DATA_BLOCK_SIZE */
3485 HCI_INIT(hci_read_data_block_size_sync),
3486 /* HCI_OP_READ_FLOW_CONTROL_MODE */
3487 HCI_INIT(hci_read_flow_control_mode_sync),
3488 /* HCI_OP_READ_LOCATION_DATA */
3489 HCI_INIT(hci_read_location_data_sync),
bce56405 3490 {}
d0b13706
LAD		 3491};
3492
3493static int hci_init1_sync(struct hci_dev *hdev)
cf75ad8b 3494{
d0b13706 3495 int err;
cf75ad8b 3496
d0b13706 3497 bt_dev_dbg(hdev, "");
cf75ad8b 3498
d0b13706
LAD		 3499 /* Reset */
3500 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
3501 err = hci_reset_sync(hdev);
3502 if (err)
3503 return err;
3504 }
cf75ad8b 3505
d0b13706
LAD		 3506 switch (hdev->dev_type) {
3507 case HCI_PRIMARY:
3508 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
3509 return hci_init_stage_sync(hdev, br_init1);
3510 case HCI_AMP:
3511 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
3512 return hci_init_stage_sync(hdev, amp_init1);
3513 default:
3514 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
3515 break;
3516 }
3517
3518 return 0;
cf75ad8b
LAD		 3519}
3520
d0b13706
LAD		 3521/* AMP Controller init stage 2 command sequence */
3522static const struct hci_init_stage amp_init2[] = {
3523 /* HCI_OP_READ_LOCAL_FEATURES */
3524 HCI_INIT(hci_read_local_features_sync),
bce56405 3525 {}
d0b13706
LAD		 3526};
3527
3528/* Read Buffer Size (ACL mtu, max pkt, etc.) */
3529static int hci_read_buffer_size_sync(struct hci_dev *hdev)
cf75ad8b 3530{
d0b13706
LAD		 3531 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
3532 0, NULL, HCI_CMD_TIMEOUT);
3533}
cf75ad8b 3534
d0b13706
LAD		 3535/* Read Class of Device */
3536static int hci_read_dev_class_sync(struct hci_dev *hdev)
3537{
3538 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
3539 0, NULL, HCI_CMD_TIMEOUT);
3540}
cf75ad8b 3541
d0b13706
LAD		 3542/* Read Local Name */
3543static int hci_read_local_name_sync(struct hci_dev *hdev)
3544{
3545 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
3546 0, NULL, HCI_CMD_TIMEOUT);
3547}
cf75ad8b 3548
d0b13706
LAD		 3549/* Read Voice Setting */
3550static int hci_read_voice_setting_sync(struct hci_dev *hdev)
3551{
3552 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
3553 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 3554}
3555
d0b13706
LAD		 3556/* Read Number of Supported IAC */
3557static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
cf75ad8b 3558{
d0b13706
LAD		 3559 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
3560 0, NULL, HCI_CMD_TIMEOUT);
3561}
cf75ad8b 3562
d0b13706
LAD		 3563/* Read Current IAC LAP */
3564static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
3565{
3566 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
3567 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 3568}
3569
d0b13706
LAD		 3570static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
3571 u8 cond_type, bdaddr_t *bdaddr,
3572 u8 auto_accept)
cf75ad8b 3573{
d0b13706 3574 struct hci_cp_set_event_filter cp;
cf75ad8b 3575
d0b13706 3576 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
cf75ad8b
LAD		 3577 return 0;
3578
0eaecfb2
IFM		 3579 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3580 return 0;
3581
d0b13706
LAD		 3582 memset(&cp, 0, sizeof(cp));
3583 cp.flt_type = flt_type;
cf75ad8b 3584
d0b13706
LAD		 3585 if (flt_type != HCI_FLT_CLEAR_ALL) {
3586 cp.cond_type = cond_type;
3587 bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
3588 cp.addr_conn_flt.auto_accept = auto_accept;
cf75ad8b
LAD		 3589 }
3590
d0b13706
LAD		 3591 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
3592 flt_type == HCI_FLT_CLEAR_ALL ?
3593 sizeof(cp.flt_type) : sizeof(cp), &cp,
3594 HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 3595}
3596
d0b13706 3597static int hci_clear_event_filter_sync(struct hci_dev *hdev)
cf75ad8b 3598{
d0b13706
LAD		 3599 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
3600 return 0;
3601
0eaecfb2
IFM		 3602 /* In theory the state machine should not reach here unless
3603 * a hci_set_event_filter_sync() call succeeds, but we do
3604 * the check both for parity and as a future reminder.
3605 */
3606 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
3607 return 0;
3608
d0b13706
LAD		 3609 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
3610 BDADDR_ANY, 0x00);
3611}
3612
3613/* Connection accept timeout ~20 secs */
3614static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
3615{
3616 __le16 param = cpu_to_le16(0x7d00);
3617
3618 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
3619 sizeof(param), &param, HCI_CMD_TIMEOUT);
3620}
3621
3622/* BR Controller init stage 2 command sequence */
3623static const struct hci_init_stage br_init2[] = {
3624 /* HCI_OP_READ_BUFFER_SIZE */
3625 HCI_INIT(hci_read_buffer_size_sync),
3626 /* HCI_OP_READ_CLASS_OF_DEV */
3627 HCI_INIT(hci_read_dev_class_sync),
3628 /* HCI_OP_READ_LOCAL_NAME */
3629 HCI_INIT(hci_read_local_name_sync),
3630 /* HCI_OP_READ_VOICE_SETTING */
3631 HCI_INIT(hci_read_voice_setting_sync),
3632 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
3633 HCI_INIT(hci_read_num_supported_iac_sync),
3634 /* HCI_OP_READ_CURRENT_IAC_LAP */
3635 HCI_INIT(hci_read_current_iac_lap_sync),
3636 /* HCI_OP_SET_EVENT_FLT */
3637 HCI_INIT(hci_clear_event_filter_sync),
3638 /* HCI_OP_WRITE_CA_TIMEOUT */
3639 HCI_INIT(hci_write_ca_timeout_sync),
3640 {}
3641};
3642
3643static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
3644{
3645 u8 mode = 0x01;
3646
3647 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3648 return 0;
3649
3650 /* When SSP is available, then the host features page
3651 * should also be available as well. However some
3652 * controllers list the max_page as 0 as long as SSP
3653 * has not been enabled. To achieve proper debugging
3654 * output, force the minimum max_page to 1 at least.
3655 */
3656 hdev->max_page = 0x01;
3657
3658 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
3659 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3660}
3661
3662static int hci_write_eir_sync(struct hci_dev *hdev)
3663{
3664 struct hci_cp_write_eir cp;
3665
3666 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
3667 return 0;
3668
3669 memset(hdev->eir, 0, sizeof(hdev->eir));
3670 memset(&cp, 0, sizeof(cp));
3671
3672 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
3673 HCI_CMD_TIMEOUT);
3674}
3675
3676static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
3677{
3678 u8 mode;
3679
3680 if (!lmp_inq_rssi_capable(hdev) &&
3681 !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3682 return 0;
3683
3684 /* If Extended Inquiry Result events are supported, then
3685 * they are clearly preferred over Inquiry Result with RSSI
3686 * events.
3687 */
3688 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
3689
3690 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
3691 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
3692}
3693
3694static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
3695{
3696 if (!lmp_inq_tx_pwr_capable(hdev))
3697 return 0;
3698
3699 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
3700 0, NULL, HCI_CMD_TIMEOUT);
3701}
3702
3703static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
3704{
3705 struct hci_cp_read_local_ext_features cp;
3706
3707 if (!lmp_ext_feat_capable(hdev))
3708 return 0;
3709
3710 memset(&cp, 0, sizeof(cp));
3711 cp.page = page;
3712
3713 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
3714 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3715}
3716
3717static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
3718{
3719 return hci_read_local_ext_features_sync(hdev, 0x01);
3720}
3721
3722/* HCI Controller init stage 2 command sequence */
3723static const struct hci_init_stage hci_init2[] = {
3724 /* HCI_OP_READ_LOCAL_COMMANDS */
3725 HCI_INIT(hci_read_local_cmds_sync),
3726 /* HCI_OP_WRITE_SSP_MODE */
3727 HCI_INIT(hci_write_ssp_mode_1_sync),
3728 /* HCI_OP_WRITE_EIR */
3729 HCI_INIT(hci_write_eir_sync),
3730 /* HCI_OP_WRITE_INQUIRY_MODE */
3731 HCI_INIT(hci_write_inquiry_mode_sync),
3732 /* HCI_OP_READ_INQ_RSP_TX_POWER */
3733 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
3734 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3735 HCI_INIT(hci_read_local_ext_features_1_sync),
3736 /* HCI_OP_WRITE_AUTH_ENABLE */
3737 HCI_INIT(hci_write_auth_enable_sync),
3738 {}
3739};
3740
3741/* Read LE Buffer Size */
3742static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
3743{
c1631dbc 3744 /* Use Read LE Buffer Size V2 if supported */
3a4d29b6 3745 if (iso_capable(hdev) && hdev->commands[41] & 0x20)
c1631dbc
LAD		 3746 return __hci_cmd_sync_status(hdev,
3747 HCI_OP_LE_READ_BUFFER_SIZE_V2,
3748 0, NULL, HCI_CMD_TIMEOUT);
3749
d0b13706
LAD		 3750 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
3751 0, NULL, HCI_CMD_TIMEOUT);
3752}
3753
3754/* Read LE Local Supported Features */
3755static int hci_le_read_local_features_sync(struct hci_dev *hdev)
3756{
3757 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
3758 0, NULL, HCI_CMD_TIMEOUT);
3759}
3760
3761/* Read LE Supported States */
3762static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
3763{
3764 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
3765 0, NULL, HCI_CMD_TIMEOUT);
3766}
3767
3768/* LE Controller init stage 2 command sequence */
3769static const struct hci_init_stage le_init2[] = {
d0b13706
LAD		 3770 /* HCI_OP_LE_READ_LOCAL_FEATURES */
3771 HCI_INIT(hci_le_read_local_features_sync),
3a4d29b6
LAD		 3772 /* HCI_OP_LE_READ_BUFFER_SIZE */
3773 HCI_INIT(hci_le_read_buffer_size_sync),
d0b13706
LAD		 3774 /* HCI_OP_LE_READ_SUPPORTED_STATES */
3775 HCI_INIT(hci_le_read_supported_states_sync),
3776 {}
3777};
3778
3779static int hci_init2_sync(struct hci_dev *hdev)
3780{
3781 int err;
3782
3783 bt_dev_dbg(hdev, "");
3784
3785 if (hdev->dev_type == HCI_AMP)
3786 return hci_init_stage_sync(hdev, amp_init2);
3787
26afbd82
LAD		 3788 err = hci_init_stage_sync(hdev, hci_init2);
3789 if (err)
3790 return err;
3791
d0b13706
LAD		 3792 if (lmp_bredr_capable(hdev)) {
3793 err = hci_init_stage_sync(hdev, br_init2);
3794 if (err)
3795 return err;
3796 } else {
3797 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
3798 }
3799
3800 if (lmp_le_capable(hdev)) {
3801 err = hci_init_stage_sync(hdev, le_init2);
3802 if (err)
3803 return err;
3804 /* LE-only controllers have LE implicitly enabled */
3805 if (!lmp_bredr_capable(hdev))
3806 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
3807 }
3808
26afbd82 3809 return 0;
d0b13706
LAD		 3810}
3811
3812static int hci_set_event_mask_sync(struct hci_dev *hdev)
3813{
3814 /* The second byte is 0xff instead of 0x9f (two reserved bits
3815 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
3816 * command otherwise.
3817 */
3818 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
3819
3820 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
3821 * any event mask for pre 1.2 devices.
3822 */
3823 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3824 return 0;
3825
3826 if (lmp_bredr_capable(hdev)) {
3827 events[4] |= 0x01; /* Flow Specification Complete */
182ee45d
LAD		 3828
3829 /* Don't set Disconnect Complete when suspended as that
3830 * would wakeup the host when disconnecting due to
3831 * suspend.
3832 */
3833 if (hdev->suspended)
3834 events[0] &= 0xef;
d0b13706
LAD		 3835 } else {
3836 /* Use a different default for LE-only devices */
3837 memset(events, 0, sizeof(events));
3838 events[1] |= 0x20; /* Command Complete */
3839 events[1] |= 0x40; /* Command Status */
3840 events[1] |= 0x80; /* Hardware Error */
3841
3842 /* If the controller supports the Disconnect command, enable
3843 * the corresponding event. In addition enable packet flow
3844 * control related events.
3845 */
3846 if (hdev->commands[0] & 0x20) {
182ee45d
LAD		 3847 /* Don't set Disconnect Complete when suspended as that
3848 * would wakeup the host when disconnecting due to
3849 * suspend.
3850 */
3851 if (!hdev->suspended)
3852 events[0] |= 0x10; /* Disconnection Complete */
d0b13706
LAD		 3853 events[2] |= 0x04; /* Number of Completed Packets */
3854 events[3] |= 0x02; /* Data Buffer Overflow */
3855 }
3856
3857 /* If the controller supports the Read Remote Version
3858 * Information command, enable the corresponding event.
3859 */
3860 if (hdev->commands[2] & 0x80)
3861 events[1] |= 0x08; /* Read Remote Version Information
3862 * Complete
3863 */
3864
3865 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
3866 events[0] |= 0x80; /* Encryption Change */
3867 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3868 }
3869 }
3870
3871 if (lmp_inq_rssi_capable(hdev) ||
3872 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3873 events[4] |= 0x02; /* Inquiry Result with RSSI */
3874
3875 if (lmp_ext_feat_capable(hdev))
3876 events[4] |= 0x04; /* Read Remote Extended Features Complete */
3877
3878 if (lmp_esco_capable(hdev)) {
3879 events[5] |= 0x08; /* Synchronous Connection Complete */
3880 events[5] |= 0x10; /* Synchronous Connection Changed */
3881 }
3882
3883 if (lmp_sniffsubr_capable(hdev))
3884 events[5] |= 0x20; /* Sniff Subrating */
3885
3886 if (lmp_pause_enc_capable(hdev))
3887 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3888
3889 if (lmp_ext_inq_capable(hdev))
3890 events[5] |= 0x40; /* Extended Inquiry Result */
3891
3892 if (lmp_no_flush_capable(hdev))
3893 events[7] |= 0x01; /* Enhanced Flush Complete */
3894
3895 if (lmp_lsto_capable(hdev))
3896 events[6] |= 0x80; /* Link Supervision Timeout Changed */
3897
3898 if (lmp_ssp_capable(hdev)) {
3899 events[6] |= 0x01; /* IO Capability Request */
3900 events[6] |= 0x02; /* IO Capability Response */
3901 events[6] |= 0x04; /* User Confirmation Request */
3902 events[6] |= 0x08; /* User Passkey Request */
3903 events[6] |= 0x10; /* Remote OOB Data Request */
3904 events[6] |= 0x20; /* Simple Pairing Complete */
3905 events[7] |= 0x04; /* User Passkey Notification */
3906 events[7] |= 0x08; /* Keypress Notification */
3907 events[7] |= 0x10; /* Remote Host Supported
3908 * Features Notification
3909 */
3910 }
3911
3912 if (lmp_le_capable(hdev))
3913 events[7] |= 0x20; /* LE Meta-Event */
3914
3915 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
3916 sizeof(events), events, HCI_CMD_TIMEOUT);
3917}
3918
3919static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
3920{
3921 struct hci_cp_read_stored_link_key cp;
3922
3923 if (!(hdev->commands[6] & 0x20) ||
3924 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
3925 return 0;
3926
3927 memset(&cp, 0, sizeof(cp));
3928 bacpy(&cp.bdaddr, BDADDR_ANY);
3929 cp.read_all = 0x01;
3930
3931 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
3932 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3933}
3934
3935static int hci_setup_link_policy_sync(struct hci_dev *hdev)
3936{
3937 struct hci_cp_write_def_link_policy cp;
3938 u16 link_policy = 0;
3939
3940 if (!(hdev->commands[5] & 0x10))
3941 return 0;
3942
3943 memset(&cp, 0, sizeof(cp));
3944
3945 if (lmp_rswitch_capable(hdev))
3946 link_policy |= HCI_LP_RSWITCH;
3947 if (lmp_hold_capable(hdev))
3948 link_policy |= HCI_LP_HOLD;
3949 if (lmp_sniff_capable(hdev))
3950 link_policy |= HCI_LP_SNIFF;
3951 if (lmp_park_capable(hdev))
3952 link_policy |= HCI_LP_PARK;
3953
3954 cp.policy = cpu_to_le16(link_policy);
3955
3956 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
3957 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3958}
3959
3960static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
3961{
3962 if (!(hdev->commands[8] & 0x01))
3963 return 0;
3964
3965 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
3966 0, NULL, HCI_CMD_TIMEOUT);
3967}
3968
3969static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
3970{
3971 if (!(hdev->commands[18] & 0x04) ||
42d7731e
IFM		 3972 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
3973 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
d0b13706
LAD		 3974 return 0;
3975
3976 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
3977 0, NULL, HCI_CMD_TIMEOUT);
3978}
3979
3980static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
3981{
3982 /* Some older Broadcom based Bluetooth 1.2 controllers do not
3983 * support the Read Page Scan Type command. Check support for
3984 * this command in the bit mask of supported commands.
3985 */
3986 if (!(hdev->commands[13] & 0x01))
3987 return 0;
3988
3989 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
3990 0, NULL, HCI_CMD_TIMEOUT);
3991}
3992
3993/* Read features beyond page 1 if available */
3994static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
3995{
3996 u8 page;
3997 int err;
3998
3999 if (!lmp_ext_feat_capable(hdev))
4000 return 0;
4001
4002 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
4003 page++) {
4004 err = hci_read_local_ext_features_sync(hdev, page);
4005 if (err)
4006 return err;
4007 }
4008
4009 return 0;
4010}
4011
4012/* HCI Controller init stage 3 command sequence */
4013static const struct hci_init_stage hci_init3[] = {
4014 /* HCI_OP_SET_EVENT_MASK */
4015 HCI_INIT(hci_set_event_mask_sync),
4016 /* HCI_OP_READ_STORED_LINK_KEY */
4017 HCI_INIT(hci_read_stored_link_key_sync),
4018 /* HCI_OP_WRITE_DEF_LINK_POLICY */
4019 HCI_INIT(hci_setup_link_policy_sync),
4020 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
4021 HCI_INIT(hci_read_page_scan_activity_sync),
4022 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
4023 HCI_INIT(hci_read_def_err_data_reporting_sync),
4024 /* HCI_OP_READ_PAGE_SCAN_TYPE */
4025 HCI_INIT(hci_read_page_scan_type_sync),
4026 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
4027 HCI_INIT(hci_read_local_ext_features_all_sync),
4028 {}
4029};
4030
4031static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
4032{
4033 u8 events[8];
4034
4035 if (!lmp_le_capable(hdev))
4036 return 0;
4037
4038 memset(events, 0, sizeof(events));
4039
4040 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
4041 events[0] |= 0x10; /* LE Long Term Key Request */
4042
4043 /* If controller supports the Connection Parameters Request
4044 * Link Layer Procedure, enable the corresponding event.
4045 */
4046 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
4047 /* LE Remote Connection Parameter Request */
4048 events[0] |= 0x20;
4049
4050 /* If the controller supports the Data Length Extension
4051 * feature, enable the corresponding event.
4052 */
4053 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
4054 events[0] |= 0x40; /* LE Data Length Change */
4055
a56a1138
LAD		 4056 /* If the controller supports LL Privacy feature or LE Extended Adv,
4057 * enable the corresponding event.
d0b13706 4058 */
a56a1138 4059 if (use_enhanced_conn_complete(hdev))
d0b13706
LAD		 4060 events[1] |= 0x02; /* LE Enhanced Connection Complete */
4061
4062 /* If the controller supports Extended Scanner Filter
4063 * Policies, enable the corresponding event.
4064 */
4065 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
4066 events[1] |= 0x04; /* LE Direct Advertising Report */
4067
4068 /* If the controller supports Channel Selection Algorithm #2
4069 * feature, enable the corresponding event.
4070 */
4071 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
4072 events[2] |= 0x08; /* LE Channel Selection Algorithm */
4073
4074 /* If the controller supports the LE Set Scan Enable command,
4075 * enable the corresponding advertising report event.
4076 */
4077 if (hdev->commands[26] & 0x08)
4078 events[0] |= 0x02; /* LE Advertising Report */
4079
4080 /* If the controller supports the LE Create Connection
4081 * command, enable the corresponding event.
4082 */
4083 if (hdev->commands[26] & 0x10)
4084 events[0] |= 0x01; /* LE Connection Complete */
4085
4086 /* If the controller supports the LE Connection Update
4087 * command, enable the corresponding event.
4088 */
4089 if (hdev->commands[27] & 0x04)
4090 events[0] |= 0x04; /* LE Connection Update Complete */
4091
4092 /* If the controller supports the LE Read Remote Used Features
4093 * command, enable the corresponding event.
4094 */
4095 if (hdev->commands[27] & 0x20)
4096 /* LE Read Remote Used Features Complete */
4097 events[0] |= 0x08;
4098
4099 /* If the controller supports the LE Read Local P-256
4100 * Public Key command, enable the corresponding event.
4101 */
4102 if (hdev->commands[34] & 0x02)
4103 /* LE Read Local P-256 Public Key Complete */
4104 events[0] |= 0x80;
4105
4106 /* If the controller supports the LE Generate DHKey
4107 * command, enable the corresponding event.
4108 */
4109 if (hdev->commands[34] & 0x04)
4110 events[1] |= 0x01; /* LE Generate DHKey Complete */
4111
4112 /* If the controller supports the LE Set Default PHY or
4113 * LE Set PHY commands, enable the corresponding event.
4114 */
4115 if (hdev->commands[35] & (0x20 | 0x40))
4116 events[1] |= 0x08; /* LE PHY Update Complete */
4117
4118 /* If the controller supports LE Set Extended Scan Parameters
4119 * and LE Set Extended Scan Enable commands, enable the
4120 * corresponding event.
4121 */
4122 if (use_ext_scan(hdev))
4123 events[1] |= 0x10; /* LE Extended Advertising Report */
4124
4125 /* If the controller supports the LE Extended Advertising
4126 * command, enable the corresponding event.
4127 */
4128 if (ext_adv_capable(hdev))
4129 events[2] |= 0x02; /* LE Advertising Set Terminated */
4130
26afbd82
LAD		 4131 if (cis_capable(hdev)) {
4132 events[3] |= 0x01; /* LE CIS Established */
4133 if (cis_peripheral_capable(hdev))
4134 events[3] |= 0x02; /* LE CIS Request */
4135 }
4136
eca0ae4a 4137 if (bis_capable(hdev)) {
c33362a5
CD		 4138 events[1] |= 0x20; /* LE PA Report */
4139 events[1] |= 0x40; /* LE PA Sync Established */
eca0ae4a
LAD		 4140 events[3] |= 0x04; /* LE Create BIG Complete */
4141 events[3] |= 0x08; /* LE Terminate BIG Complete */
4142 events[3] |= 0x10; /* LE BIG Sync Established */
4143 events[3] |= 0x20; /* LE BIG Sync Loss */
c33362a5 4144 events[4] |= 0x02; /* LE BIG Info Advertising Report */
eca0ae4a
LAD		 4145 }
4146
d0b13706
LAD		 4147 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
4148 sizeof(events), events, HCI_CMD_TIMEOUT);
4149}
4150
4151/* Read LE Advertising Channel TX Power */
4152static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
4153{
4154 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
4155 /* HCI TS spec forbids mixing of legacy and extended
4156 * advertising commands wherein READ_ADV_TX_POWER is
4157 * also included. So do not call it if extended adv
4158 * is supported otherwise controller will return
4159 * COMMAND_DISALLOWED for extended commands.
4160 */
4161 return __hci_cmd_sync_status(hdev,
4162 HCI_OP_LE_READ_ADV_TX_POWER,
4163 0, NULL, HCI_CMD_TIMEOUT);
4164 }
4165
4166 return 0;
4167}
4168
4169/* Read LE Min/Max Tx Power*/
4170static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
4171{
d2f8114f
AG		 4172 if (!(hdev->commands[38] & 0x80) ||
4173 test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
d0b13706
LAD		 4174 return 0;
4175
4176 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
4177 0, NULL, HCI_CMD_TIMEOUT);
4178}
4179
4180/* Read LE Accept List Size */
4181static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
4182{
4183 if (!(hdev->commands[26] & 0x40))
4184 return 0;
4185
4186 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4187 0, NULL, HCI_CMD_TIMEOUT);
4188}
4189
4190/* Clear LE Accept List */
4191static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
4192{
4193 if (!(hdev->commands[26] & 0x80))
4194 return 0;
4195
4196 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
4197 HCI_CMD_TIMEOUT);
4198}
4199
4200/* Read LE Resolving List Size */
4201static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
4202{
4203 if (!(hdev->commands[34] & 0x40))
4204 return 0;
4205
4206 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
4207 0, NULL, HCI_CMD_TIMEOUT);
4208}
4209
4210/* Clear LE Resolving List */
4211static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
4212{
4213 if (!(hdev->commands[34] & 0x20))
4214 return 0;
4215
4216 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
4217 HCI_CMD_TIMEOUT);
4218}
4219
4220/* Set RPA timeout */
4221static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
4222{
4223 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
4224
91b6d02d
RC		 4225 if (!(hdev->commands[35] & 0x04) ||
4226 test_bit(HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT, &hdev->quirks))
d0b13706
LAD		 4227 return 0;
4228
4229 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
4230 sizeof(timeout), &timeout,
4231 HCI_CMD_TIMEOUT);
4232}
4233
4234/* Read LE Maximum Data Length */
4235static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
4236{
4237 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4238 return 0;
4239
4240 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
4241 HCI_CMD_TIMEOUT);
4242}
4243
4244/* Read LE Suggested Default Data Length */
4245static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
4246{
4247 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4248 return 0;
4249
4250 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
4251 HCI_CMD_TIMEOUT);
4252}
4253
4254/* Read LE Number of Supported Advertising Sets */
4255static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
4256{
4257 if (!ext_adv_capable(hdev))
4258 return 0;
4259
4260 return __hci_cmd_sync_status(hdev,
4261 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4262 0, NULL, HCI_CMD_TIMEOUT);
4263}
4264
4265/* Write LE Host Supported */
4266static int hci_set_le_support_sync(struct hci_dev *hdev)
4267{
4268 struct hci_cp_write_le_host_supported cp;
4269
4270 /* LE-only devices do not support explicit enablement */
4271 if (!lmp_bredr_capable(hdev))
4272 return 0;
4273
4274 memset(&cp, 0, sizeof(cp));
4275
4276 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
4277 cp.le = 0x01;
4278 cp.simul = 0x00;
4279 }
4280
4281 if (cp.le == lmp_host_le_capable(hdev))
4282 return 0;
4283
4284 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
4285 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4286}
4287
26afbd82
LAD		 4288/* LE Set Host Feature */
4289static int hci_le_set_host_feature_sync(struct hci_dev *hdev)
4290{
4291 struct hci_cp_le_set_host_feature cp;
4292
4293 if (!iso_capable(hdev))
4294 return 0;
4295
4296 memset(&cp, 0, sizeof(cp));
4297
4298 /* Isochronous Channels (Host Support) */
4299 cp.bit_number = 32;
4300 cp.bit_value = 1;
4301
4302 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE,
4303 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4304}
4305
d0b13706
LAD		 4306/* LE Controller init stage 3 command sequence */
4307static const struct hci_init_stage le_init3[] = {
4308 /* HCI_OP_LE_SET_EVENT_MASK */
4309 HCI_INIT(hci_le_set_event_mask_sync),
4310 /* HCI_OP_LE_READ_ADV_TX_POWER */
4311 HCI_INIT(hci_le_read_adv_tx_power_sync),
4312 /* HCI_OP_LE_READ_TRANSMIT_POWER */
4313 HCI_INIT(hci_le_read_tx_power_sync),
4314 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
4315 HCI_INIT(hci_le_read_accept_list_size_sync),
4316 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
4317 HCI_INIT(hci_le_clear_accept_list_sync),
4318 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
4319 HCI_INIT(hci_le_read_resolv_list_size_sync),
4320 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
4321 HCI_INIT(hci_le_clear_resolv_list_sync),
4322 /* HCI_OP_LE_SET_RPA_TIMEOUT */
4323 HCI_INIT(hci_le_set_rpa_timeout_sync),
4324 /* HCI_OP_LE_READ_MAX_DATA_LEN */
4325 HCI_INIT(hci_le_read_max_data_len_sync),
4326 /* HCI_OP_LE_READ_DEF_DATA_LEN */
4327 HCI_INIT(hci_le_read_def_data_len_sync),
4328 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
4329 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
4330 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
4331 HCI_INIT(hci_set_le_support_sync),
26afbd82
LAD		 4332 /* HCI_OP_LE_SET_HOST_FEATURE */
4333 HCI_INIT(hci_le_set_host_feature_sync),
d0b13706
LAD		 4334 {}
4335};
4336
4337static int hci_init3_sync(struct hci_dev *hdev)
4338{
4339 int err;
4340
4341 bt_dev_dbg(hdev, "");
4342
4343 err = hci_init_stage_sync(hdev, hci_init3);
4344 if (err)
4345 return err;
4346
4347 if (lmp_le_capable(hdev))
4348 return hci_init_stage_sync(hdev, le_init3);
4349
4350 return 0;
4351}
4352
4353static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
4354{
4355 struct hci_cp_delete_stored_link_key cp;
4356
4357 /* Some Broadcom based Bluetooth controllers do not support the
4358 * Delete Stored Link Key command. They are clearly indicating its
4359 * absence in the bit mask of supported commands.
4360 *
4361 * Check the supported commands and only if the command is marked
4362 * as supported send it. If not supported assume that the controller
4363 * does not have actual support for stored link keys which makes this
4364 * command redundant anyway.
4365 *
4366 * Some controllers indicate that they support handling deleting
4367 * stored link keys, but they don't. The quirk lets a driver
4368 * just disable this command.
4369 */
4370 if (!(hdev->commands[6] & 0x80) ||
4371 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
4372 return 0;
4373
4374 memset(&cp, 0, sizeof(cp));
4375 bacpy(&cp.bdaddr, BDADDR_ANY);
4376 cp.delete_all = 0x01;
4377
4378 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
4379 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4380}
4381
4382static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
4383{
4384 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
4385 bool changed = false;
4386
4387 /* Set event mask page 2 if the HCI command for it is supported */
4388 if (!(hdev->commands[22] & 0x04))
4389 return 0;
4390
4391 /* If Connectionless Peripheral Broadcast central role is supported
4392 * enable all necessary events for it.
4393 */
4394 if (lmp_cpb_central_capable(hdev)) {
4395 events[1] |= 0x40; /* Triggered Clock Capture */
4396 events[1] |= 0x80; /* Synchronization Train Complete */
0feb8af0 4397 events[2] |= 0x08; /* Truncated Page Complete */
d0b13706
LAD		 4398 events[2] |= 0x20; /* CPB Channel Map Change */
4399 changed = true;
4400 }
4401
4402 /* If Connectionless Peripheral Broadcast peripheral role is supported
4403 * enable all necessary events for it.
4404 */
4405 if (lmp_cpb_peripheral_capable(hdev)) {
4406 events[2] |= 0x01; /* Synchronization Train Received */
4407 events[2] |= 0x02; /* CPB Receive */
4408 events[2] |= 0x04; /* CPB Timeout */
0feb8af0 4409 events[2] |= 0x10; /* Peripheral Page Response Timeout */
d0b13706
LAD		 4410 changed = true;
4411 }
4412
4413 /* Enable Authenticated Payload Timeout Expired event if supported */
4414 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
4415 events[2] |= 0x80;
4416 changed = true;
4417 }
4418
4419 /* Some Broadcom based controllers indicate support for Set Event
4420 * Mask Page 2 command, but then actually do not support it. Since
4421 * the default value is all bits set to zero, the command is only
4422 * required if the event mask has to be changed. In case no change
4423 * to the event mask is needed, skip this command.
4424 */
4425 if (!changed)
4426 return 0;
4427
4428 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
4429 sizeof(events), events, HCI_CMD_TIMEOUT);
4430}
4431
4432/* Read local codec list if the HCI command is supported */
4433static int hci_read_local_codecs_sync(struct hci_dev *hdev)
4434{
828cea2b
C		 4435 if (hdev->commands[45] & 0x04)
4436 hci_read_supported_codecs_v2(hdev);
4437 else if (hdev->commands[29] & 0x20)
4438 hci_read_supported_codecs(hdev);
d0b13706 4439
828cea2b 4440 return 0;
d0b13706
LAD		 4441}
4442
4443/* Read local pairing options if the HCI command is supported */
4444static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
4445{
4446 if (!(hdev->commands[41] & 0x08))
4447 return 0;
4448
4449 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
4450 0, NULL, HCI_CMD_TIMEOUT);
4451}
4452
4453/* Get MWS transport configuration if the HCI command is supported */
4454static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
4455{
ffcb0a44 4456 if (!mws_transport_config_capable(hdev))
d0b13706
LAD		 4457 return 0;
4458
4459 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
4460 0, NULL, HCI_CMD_TIMEOUT);
4461}
4462
4463/* Check for Synchronization Train support */
4464static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
4465{
4466 if (!lmp_sync_train_capable(hdev))
4467 return 0;
4468
4469 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
4470 0, NULL, HCI_CMD_TIMEOUT);
4471}
4472
4473/* Enable Secure Connections if supported and configured */
4474static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
4475{
4476 u8 support = 0x01;
4477
4478 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
4479 !bredr_sc_enabled(hdev))
4480 return 0;
4481
4482 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
4483 sizeof(support), &support,
4484 HCI_CMD_TIMEOUT);
4485}
4486
4487/* Set erroneous data reporting if supported to the wideband speech
4488 * setting value
4489 */
4490static int hci_set_err_data_report_sync(struct hci_dev *hdev)
4491{
4492 struct hci_cp_write_def_err_data_reporting cp;
4493 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
4494
4495 if (!(hdev->commands[18] & 0x08) ||
42d7731e
IFM		 4496 !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
4497 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
d0b13706
LAD		 4498 return 0;
4499
4500 if (enabled == hdev->err_data_reporting)
4501 return 0;
4502
4503 memset(&cp, 0, sizeof(cp));
4504 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
4505 ERR_DATA_REPORTING_DISABLED;
4506
4507 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4508 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4509}
4510
4511static const struct hci_init_stage hci_init4[] = {
4512 /* HCI_OP_DELETE_STORED_LINK_KEY */
4513 HCI_INIT(hci_delete_stored_link_key_sync),
4514 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
4515 HCI_INIT(hci_set_event_mask_page_2_sync),
4516 /* HCI_OP_READ_LOCAL_CODECS */
4517 HCI_INIT(hci_read_local_codecs_sync),
4518 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
4519 HCI_INIT(hci_read_local_pairing_opts_sync),
4520 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
4521 HCI_INIT(hci_get_mws_transport_config_sync),
4522 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
4523 HCI_INIT(hci_read_sync_train_params_sync),
4524 /* HCI_OP_WRITE_SC_SUPPORT */
4525 HCI_INIT(hci_write_sc_support_1_sync),
4526 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
4527 HCI_INIT(hci_set_err_data_report_sync),
4528 {}
4529};
4530
4531/* Set Suggested Default Data Length to maximum if supported */
4532static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
4533{
4534 struct hci_cp_le_write_def_data_len cp;
4535
4536 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
4537 return 0;
4538
4539 memset(&cp, 0, sizeof(cp));
4540 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
4541 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
4542
4543 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
4544 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4545}
4546
288c9022
LAD		 4547/* Set Default PHY parameters if command is supported, enables all supported
4548 * PHYs according to the LE Features bits.
4549 */
d0b13706
LAD		 4550static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
4551{
4552 struct hci_cp_le_set_default_phy cp;
4553
288c9022
LAD		 4554 if (!(hdev->commands[35] & 0x20)) {
4555 /* If the command is not supported it means only 1M PHY is
4556 * supported.
4557 */
4558 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
4559 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
d0b13706 4560 return 0;
288c9022 4561 }
d0b13706
LAD		 4562
4563 memset(&cp, 0, sizeof(cp));
4564 cp.all_phys = 0x00;
288c9022
LAD		 4565 cp.tx_phys = HCI_LE_SET_PHY_1M;
4566 cp.rx_phys = HCI_LE_SET_PHY_1M;
4567
4568 /* Enables 2M PHY if supported */
4569 if (le_2m_capable(hdev)) {
4570 cp.tx_phys |= HCI_LE_SET_PHY_2M;
4571 cp.rx_phys |= HCI_LE_SET_PHY_2M;
4572 }
4573
4574 /* Enables Coded PHY if supported */
4575 if (le_coded_capable(hdev)) {
4576 cp.tx_phys |= HCI_LE_SET_PHY_CODED;
4577 cp.rx_phys |= HCI_LE_SET_PHY_CODED;
4578 }
d0b13706
LAD		 4579
4580 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
4581 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4582}
4583
4584static const struct hci_init_stage le_init4[] = {
4585 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
4586 HCI_INIT(hci_le_set_write_def_data_len_sync),
4587 /* HCI_OP_LE_SET_DEFAULT_PHY */
4588 HCI_INIT(hci_le_set_default_phy_sync),
4589 {}
4590};
4591
4592static int hci_init4_sync(struct hci_dev *hdev)
4593{
4594 int err;
4595
4596 bt_dev_dbg(hdev, "");
4597
4598 err = hci_init_stage_sync(hdev, hci_init4);
4599 if (err)
4600 return err;
4601
4602 if (lmp_le_capable(hdev))
4603 return hci_init_stage_sync(hdev, le_init4);
4604
4605 return 0;
4606}
4607
4608static int hci_init_sync(struct hci_dev *hdev)
4609{
4610 int err;
4611
4612 err = hci_init1_sync(hdev);
4613 if (err < 0)
4614 return err;
4615
4616 if (hci_dev_test_flag(hdev, HCI_SETUP))
4617 hci_debugfs_create_basic(hdev);
4618
4619 err = hci_init2_sync(hdev);
4620 if (err < 0)
4621 return err;
4622
4623 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
4624 * BR/EDR/LE type controllers. AMP controllers only need the
4625 * first two stages of init.
4626 */
4627 if (hdev->dev_type != HCI_PRIMARY)
4628 return 0;
4629
4630 err = hci_init3_sync(hdev);
4631 if (err < 0)
4632 return err;
4633
4634 err = hci_init4_sync(hdev);
4635 if (err < 0)
4636 return err;
4637
4638 /* This function is only called when the controller is actually in
4639 * configured state. When the controller is marked as unconfigured,
4640 * this initialization procedure is not run.
4641 *
4642 * It means that it is possible that a controller runs through its
4643 * setup phase and then discovers missing settings. If that is the
4644 * case, then this function will not be called. It then will only
4645 * be called during the config phase.
4646 *
4647 * So only when in setup phase or config phase, create the debugfs
4648 * entries and register the SMP channels.
4649 */
4650 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4651 !hci_dev_test_flag(hdev, HCI_CONFIG))
4652 return 0;
4653
fe2ccc6c
JH		 4654 if (hci_dev_test_and_set_flag(hdev, HCI_DEBUGFS_CREATED))
4655 return 0;
4656
d0b13706
LAD		 4657 hci_debugfs_create_common(hdev);
4658
4659 if (lmp_bredr_capable(hdev))
4660 hci_debugfs_create_bredr(hdev);
4661
4662 if (lmp_le_capable(hdev))
4663 hci_debugfs_create_le(hdev);
4664
4665 return 0;
4666}
4667
6b5c1cda
LAD		 4668#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
4669
4670static const struct {
4671 unsigned long quirk;
4672 const char *desc;
4673} hci_broken_table[] = {
4674 HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
4675 "HCI Read Local Supported Commands not supported"),
4676 HCI_QUIRK_BROKEN(STORED_LINK_KEY,
4677 "HCI Delete Stored Link Key command is advertised, "
4678 "but not supported."),
42d7731e
IFM		 4679 HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
4680 "HCI Read Default Erroneous Data Reporting command is "
4681 "advertised, but not supported."),
6b5c1cda
LAD		 4682 HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
4683 "HCI Read Transmit Power Level command is advertised, "
4684 "but not supported."),
4685 HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
4686 "HCI Set Event Filter command not supported."),
4687 HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
4688 "HCI Enhanced Setup Synchronous Connection command is "
91b6d02d
RC		 4689 "advertised, but not supported."),
4690 HCI_QUIRK_BROKEN(SET_RPA_TIMEOUT,
4691 "HCI LE Set Random Private Address Timeout command is "
6b5c1cda
LAD		 4692 "advertised, but not supported.")
4693};
4694
1bbf4023
LAD		 4695/* This function handles hdev setup stage:
4696 *
4697 * Calls hdev->setup
4698 * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set.
4699 */
4700static int hci_dev_setup_sync(struct hci_dev *hdev)
d0b13706
LAD		 4701{
4702 int ret = 0;
1bbf4023
LAD		 4703 bool invalid_bdaddr;
4704 size_t i;
d0b13706
LAD		 4705
4706 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1bbf4023
LAD		 4707 !test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks))
4708 return 0;
d0b13706 4709
1bbf4023 4710 bt_dev_dbg(hdev, "");
d0b13706 4711
1bbf4023 4712 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
d0b13706 4713
1bbf4023
LAD		 4714 if (hdev->setup)
4715 ret = hdev->setup(hdev);
6b5c1cda 4716
1bbf4023
LAD		 4717 for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
4718 if (test_bit(hci_broken_table[i].quirk, &hdev->quirks))
4719 bt_dev_warn(hdev, "%s", hci_broken_table[i].desc);
4720 }
d0b13706 4721
1bbf4023
LAD		 4722 /* The transport driver can set the quirk to mark the
4723 * BD_ADDR invalid before creating the HCI device or in
4724 * its setup callback.
4725 */
6945795b
JH		 4726 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
4727 test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
1bbf4023 4728 if (!ret) {
0cb73658
JH		 4729 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks) &&
4730 !bacmp(&hdev->public_addr, BDADDR_ANY))
4731 hci_dev_get_bd_addr_from_property(hdev);
4732
6945795b 4733 if (invalid_bdaddr && bacmp(&hdev->public_addr, BDADDR_ANY) &&
0cb73658
JH		 4734 hdev->set_bdaddr) {
4735 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4736 if (!ret)
4737 invalid_bdaddr = false;
d0b13706 4738 }
1bbf4023 4739 }
d0b13706 4740
1bbf4023
LAD		 4741 /* The transport driver can set these quirks before
4742 * creating the HCI device or in its setup callback.
4743 *
4744 * For the invalid BD_ADDR quirk it is possible that
4745 * it becomes a valid address if the bootloader does
4746 * provide it (see above).
4747 *
4748 * In case any of them is set, the controller has to
4749 * start up as unconfigured.
4750 */
4751 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
4752 invalid_bdaddr)
4753 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
d0b13706 4754
1bbf4023
LAD		 4755 /* For an unconfigured controller it is required to
4756 * read at least the version information provided by
4757 * the Read Local Version Information command.
4758 *
4759 * If the set_bdaddr driver callback is provided, then
4760 * also the original Bluetooth public device address
4761 * will be read using the Read BD Address command.
4762 */
4763 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4764 return hci_unconf_init_sync(hdev);
4765
4766 return ret;
4767}
4768
4769/* This function handles hdev init stage:
4770 *
4771 * Calls hci_dev_setup_sync to perform setup stage
4772 * Calls hci_init_sync to perform HCI command init sequence
4773 */
4774static int hci_dev_init_sync(struct hci_dev *hdev)
4775{
4776 int ret;
4777
4778 bt_dev_dbg(hdev, "");
4779
4780 atomic_set(&hdev->cmd_cnt, 1);
4781 set_bit(HCI_INIT, &hdev->flags);
4782
4783 ret = hci_dev_setup_sync(hdev);
d0b13706
LAD		 4784
4785 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
4786 /* If public address change is configured, ensure that
4787 * the address gets programmed. If the driver does not
4788 * support changing the public address, fail the power
4789 * on procedure.
4790 */
4791 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
4792 hdev->set_bdaddr)
4793 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
4794 else
4795 ret = -EADDRNOTAVAIL;
4796 }
4797
4798 if (!ret) {
4799 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4800 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4801 ret = hci_init_sync(hdev);
4802 if (!ret && hdev->post_init)
4803 ret = hdev->post_init(hdev);
4804 }
4805 }
4806
4807 /* If the HCI Reset command is clearing all diagnostic settings,
4808 * then they need to be reprogrammed after the init procedure
4809 * completed.
4810 */
4811 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
4812 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4813 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
4814 ret = hdev->set_diag(hdev, true);
4815
385315de
JM		 4816 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4817 msft_do_open(hdev);
4818 aosp_do_open(hdev);
4819 }
d0b13706
LAD		 4820
4821 clear_bit(HCI_INIT, &hdev->flags);
4822
1bbf4023
LAD		 4823 return ret;
4824}
4825
4826int hci_dev_open_sync(struct hci_dev *hdev)
4827{
4828 int ret;
4829
4830 bt_dev_dbg(hdev, "");
4831
4832 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
4833 ret = -ENODEV;
4834 goto done;
4835 }
4836
4837 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4838 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
4839 /* Check for rfkill but allow the HCI setup stage to
4840 * proceed (which in itself doesn't cause any RF activity).
4841 */
4842 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
4843 ret = -ERFKILL;
4844 goto done;
4845 }
4846
4847 /* Check for valid public address or a configured static
4848 * random address, but let the HCI setup proceed to
4849 * be able to determine if there is a public address
4850 * or not.
4851 *
4852 * In case of user channel usage, it is not important
4853 * if a public address or static random address is
4854 * available.
4855 *
4856 * This check is only valid for BR/EDR controllers
4857 * since AMP controllers do not have an address.
4858 */
4859 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4860 hdev->dev_type == HCI_PRIMARY &&
4861 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
4862 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
4863 ret = -EADDRNOTAVAIL;
4864 goto done;
4865 }
4866 }
4867
4868 if (test_bit(HCI_UP, &hdev->flags)) {
4869 ret = -EALREADY;
4870 goto done;
4871 }
4872
4873 if (hdev->open(hdev)) {
4874 ret = -EIO;
4875 goto done;
4876 }
4877
9695ef87
APS		 4878 hci_devcd_reset(hdev);
4879
1bbf4023
LAD		 4880 set_bit(HCI_RUNNING, &hdev->flags);
4881 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
4882
4883 ret = hci_dev_init_sync(hdev);
d0b13706
LAD		 4884 if (!ret) {
4885 hci_dev_hold(hdev);
4886 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
4887 hci_adv_instances_set_rpa_expired(hdev, true);
4888 set_bit(HCI_UP, &hdev->flags);
4889 hci_sock_dev_event(hdev, HCI_DEV_UP);
4890 hci_leds_update_powered(hdev, true);
4891 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4892 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
4893 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4894 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4895 hci_dev_test_flag(hdev, HCI_MGMT) &&
4896 hdev->dev_type == HCI_PRIMARY) {
4897 ret = hci_powered_update_sync(hdev);
6abf0dae 4898 mgmt_power_on(hdev, ret);
d0b13706
LAD		 4899 }
4900 } else {
4901 /* Init failed, cleanup */
4902 flush_work(&hdev->tx_work);
4903
4904 /* Since hci_rx_work() is possible to awake new cmd_work
4905 * it should be flushed first to avoid unexpected call of
4906 * hci_cmd_work()
4907 */
4908 flush_work(&hdev->rx_work);
4909 flush_work(&hdev->cmd_work);
4910
4911 skb_queue_purge(&hdev->cmd_q);
4912 skb_queue_purge(&hdev->rx_q);
4913
4914 if (hdev->flush)
4915 hdev->flush(hdev);
4916
4917 if (hdev->sent_cmd) {
97dfaf07 4918 cancel_delayed_work_sync(&hdev->cmd_timer);
d0b13706
LAD		 4919 kfree_skb(hdev->sent_cmd);
4920 hdev->sent_cmd = NULL;
4921 }
4922
4923 clear_bit(HCI_RUNNING, &hdev->flags);
4924 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4925
4926 hdev->close(hdev);
4927 hdev->flags &= BIT(HCI_RAW);
4928 }
4929
4930done:
4931 return ret;
4932}
4933
4934/* This function requires the caller holds hdev->lock */
4935static void hci_pend_le_actions_clear(struct hci_dev *hdev)
4936{
4937 struct hci_conn_params *p;
4938
4939 list_for_each_entry(p, &hdev->le_conn_params, list) {
195ef75e 4940 hci_pend_le_list_del_init(p);
d0b13706
LAD		 4941 if (p->conn) {
4942 hci_conn_drop(p->conn);
4943 hci_conn_put(p->conn);
4944 p->conn = NULL;
4945 }
d0b13706
LAD		 4946 }
4947
4948 BT_DBG("All LE pending actions cleared");
4949}
4950
8dbc3e75
APS		 4951static int hci_dev_shutdown(struct hci_dev *hdev)
4952{
4953 int err = 0;
4954 /* Similar to how we first do setup and then set the exclusive access
4955 * bit for userspace, we must first unset userchannel and then clean up.
4956 * Otherwise, the kernel can't properly use the hci channel to clean up
4957 * the controller (some shutdown routines require sending additional
4958 * commands to the controller for example).
4959 */
4960 bool was_userchannel =
4961 hci_dev_test_and_clear_flag(hdev, HCI_USER_CHANNEL);
4962
4963 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
4964 test_bit(HCI_UP, &hdev->flags)) {
4965 /* Execute vendor specific shutdown routine */
4966 if (hdev->shutdown)
4967 err = hdev->shutdown(hdev);
4968 }
4969
4970 if (was_userchannel)
4971 hci_dev_set_flag(hdev, HCI_USER_CHANNEL);
4972
4973 return err;
4974}
4975
d0b13706
LAD		 4976int hci_dev_close_sync(struct hci_dev *hdev)
4977{
4978 bool auto_off;
4979 int err = 0;
4980
4981 bt_dev_dbg(hdev, "");
4982
4983 cancel_delayed_work(&hdev->power_off);
4984 cancel_delayed_work(&hdev->ncmd_timer);
8ffde2a7 4985 cancel_delayed_work(&hdev->le_scan_disable);
27d54b77 4986 cancel_delayed_work(&hdev->le_scan_restart);
d0b13706
LAD		 4987
4988 hci_request_cancel_all(hdev);
4989
c249ea9b
BG		 4990 if (hdev->adv_instance_timeout) {
4991 cancel_delayed_work_sync(&hdev->adv_instance_expire);
4992 hdev->adv_instance_timeout = 0;
4993 }
4994
8dbc3e75 4995 err = hci_dev_shutdown(hdev);
d0b13706
LAD		 4996
4997 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
4998 cancel_delayed_work_sync(&hdev->cmd_timer);
4999 return err;
5000 }
5001
5002 hci_leds_update_powered(hdev, false);
5003
5004 /* Flush RX and TX works */
5005 flush_work(&hdev->tx_work);
5006 flush_work(&hdev->rx_work);
5007
5008 if (hdev->discov_timeout > 0) {
5009 hdev->discov_timeout = 0;
5010 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
5011 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
5012 }
5013
5014 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
5015 cancel_delayed_work(&hdev->service_cache);
5016
5017 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
5018 struct adv_info *adv_instance;
5019
5020 cancel_delayed_work_sync(&hdev->rpa_expired);
5021
5022 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
5023 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
5024 }
5025
5026 /* Avoid potential lockdep warnings from the *_flush() calls by
5027 * ensuring the workqueue is empty up front.
5028 */
5029 drain_workqueue(hdev->workqueue);
5030
5031 hci_dev_lock(hdev);
5032
5033 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
5034
5035 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
5036
5037 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
5038 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5039 hci_dev_test_flag(hdev, HCI_MGMT))
5040 __mgmt_power_off(hdev);
5041
5042 hci_inquiry_cache_flush(hdev);
5043 hci_pend_le_actions_clear(hdev);
5044 hci_conn_hash_flush(hdev);
fa78d2d1 5045 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
d0b13706 5046 smp_unregister(hdev);
fa78d2d1 5047 hci_dev_unlock(hdev);
d0b13706
LAD		 5048
5049 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
5050
385315de
JM		 5051 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5052 aosp_do_close(hdev);
5053 msft_do_close(hdev);
5054 }
d0b13706
LAD		 5055
5056 if (hdev->flush)
5057 hdev->flush(hdev);
5058
5059 /* Reset device */
5060 skb_queue_purge(&hdev->cmd_q);
5061 atomic_set(&hdev->cmd_cnt, 1);
5062 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
5063 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
5064 set_bit(HCI_INIT, &hdev->flags);
5065 hci_reset_sync(hdev);
5066 clear_bit(HCI_INIT, &hdev->flags);
5067 }
5068
5069 /* flush cmd work */
5070 flush_work(&hdev->cmd_work);
5071
5072 /* Drop queues */
5073 skb_queue_purge(&hdev->rx_q);
5074 skb_queue_purge(&hdev->cmd_q);
5075 skb_queue_purge(&hdev->raw_q);
5076
5077 /* Drop last sent command */
5078 if (hdev->sent_cmd) {
5079 cancel_delayed_work_sync(&hdev->cmd_timer);
5080 kfree_skb(hdev->sent_cmd);
5081 hdev->sent_cmd = NULL;
5082 }
5083
5084 clear_bit(HCI_RUNNING, &hdev->flags);
5085 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
5086
d0b13706
LAD		 5087 /* After this point our queues are empty and no tasks are scheduled. */
5088 hdev->close(hdev);
5089
5090 /* Clear flags */
5091 hdev->flags &= BIT(HCI_RAW);
5092 hci_dev_clear_volatile_flags(hdev);
5093
5094 /* Controller radio is available but is currently powered down */
5095 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
5096
5097 memset(hdev->eir, 0, sizeof(hdev->eir));
5098 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
5099 bacpy(&hdev->random_addr, BDADDR_ANY);
5100
5101 hci_dev_put(hdev);
5102 return err;
5103}
5104
5105/* This function perform power on HCI command sequence as follows:
5106 *
5107 * If controller is already up (HCI_UP) performs hci_powered_update_sync
5108 * sequence otherwise run hci_dev_open_sync which will follow with
5109 * hci_powered_update_sync after the init sequence is completed.
5110 */
5111static int hci_power_on_sync(struct hci_dev *hdev)
5112{
5113 int err;
5114
5115 if (test_bit(HCI_UP, &hdev->flags) &&
5116 hci_dev_test_flag(hdev, HCI_MGMT) &&
5117 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
5118 cancel_delayed_work(&hdev->power_off);
5119 return hci_powered_update_sync(hdev);
5120 }
5121
5122 err = hci_dev_open_sync(hdev);
5123 if (err < 0)
5124 return err;
5125
5126 /* During the HCI setup phase, a few error conditions are
5127 * ignored and they need to be checked now. If they are still
5128 * valid, it is important to return the device back off.
5129 */
5130 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
5131 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
5132 (hdev->dev_type == HCI_PRIMARY &&
5133 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
5134 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
5135 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
5136 hci_dev_close_sync(hdev);
5137 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
5138 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
5139 HCI_AUTO_OFF_TIMEOUT);
5140 }
5141
5142 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
5143 /* For unconfigured devices, set the HCI_RAW flag
5144 * so that userspace can easily identify them.
5145 */
5146 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5147 set_bit(HCI_RAW, &hdev->flags);
5148
5149 /* For fully configured devices, this will send
5150 * the Index Added event. For unconfigured devices,
5151 * it will send Unconfigued Index Added event.
5152 *
5153 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
5154 * and no event will be send.
5155 */
5156 mgmt_index_added(hdev);
5157 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
5158 /* When the controller is now configured, then it
5159 * is important to clear the HCI_RAW flag.
5160 */
5161 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5162 clear_bit(HCI_RAW, &hdev->flags);
5163
5164 /* Powering on the controller with HCI_CONFIG set only
5165 * happens with the transition from unconfigured to
5166 * configured. This will send the Index Added event.
5167 */
5168 mgmt_index_added(hdev);
5169 }
5170
5171 return 0;
5172}
5173
5174static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
5175{
5176 struct hci_cp_remote_name_req_cancel cp;
5177
5178 memset(&cp, 0, sizeof(cp));
5179 bacpy(&cp.bdaddr, addr);
5180
5181 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
5182 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5183}
5184
5185int hci_stop_discovery_sync(struct hci_dev *hdev)
5186{
5187 struct discovery_state *d = &hdev->discovery;
5188 struct inquiry_entry *e;
5189 int err;
5190
5191 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
5192
5193 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
5194 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
5195 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
5196 0, NULL, HCI_CMD_TIMEOUT);
5197 if (err)
5198 return err;
5199 }
5200
5201 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5202 cancel_delayed_work(&hdev->le_scan_disable);
5203 cancel_delayed_work(&hdev->le_scan_restart);
5204
5205 err = hci_scan_disable_sync(hdev);
5206 if (err)
5207 return err;
5208 }
5209
5210 } else {
5211 err = hci_scan_disable_sync(hdev);
5212 if (err)
5213 return err;
5214 }
5215
5216 /* Resume advertising if it was paused */
5217 if (use_ll_privacy(hdev))
5218 hci_resume_advertising_sync(hdev);
5219
5220 /* No further actions needed for LE-only discovery */
5221 if (d->type == DISCOV_TYPE_LE)
5222 return 0;
5223
5224 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
5225 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
5226 NAME_PENDING);
5227 if (!e)
5228 return 0;
5229
5230 return hci_remote_name_cancel_sync(hdev, &e->data.bdaddr);
5231 }
5232
5233 return 0;
5234}
5235
5236static int hci_disconnect_phy_link_sync(struct hci_dev *hdev, u16 handle,
5237 u8 reason)
5238{
5239 struct hci_cp_disconn_phy_link cp;
5240
5241 memset(&cp, 0, sizeof(cp));
5242 cp.phy_handle = HCI_PHY_HANDLE(handle);
5243 cp.reason = reason;
5244
5245 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONN_PHY_LINK,
5246 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5247}
5248
5249static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
5250 u8 reason)
5251{
5252 struct hci_cp_disconnect cp;
5253
5254 if (conn->type == AMP_LINK)
5255 return hci_disconnect_phy_link_sync(hdev, conn->handle, reason);
5256
5257 memset(&cp, 0, sizeof(cp));
5258 cp.handle = cpu_to_le16(conn->handle);
5259 cp.reason = reason;
5260
f5d13029
AP		 5261 /* Wait for HCI_EV_DISCONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5262 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5263 * used when suspending or powering off, where we don't want to wait
5264 * for the peer's response.
d0b13706 5265 */
f5d13029 5266 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
d0b13706
LAD		 5267 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
5268 sizeof(cp), &cp,
5269 HCI_EV_DISCONN_COMPLETE,
5270 HCI_CMD_TIMEOUT, NULL);
5271
5272 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
5273 HCI_CMD_TIMEOUT);
5274}
5275
5276static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
a13f316e 5277 struct hci_conn *conn, u8 reason)
d0b13706 5278{
a13f316e
LAD		 5279 /* Return reason if scanning since the connection shall probably be
5280 * cleanup directly.
5281 */
d0b13706 5282 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
a13f316e 5283 return reason;
d0b13706 5284
a13f316e
LAD		 5285 if (conn->role == HCI_ROLE_SLAVE ||
5286 test_and_set_bit(HCI_CONN_CANCEL, &conn->flags))
b62e7220
LAD		 5287 return 0;
5288
d0b13706 5289 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
b62e7220 5290 0, NULL, HCI_CMD_TIMEOUT);
d0b13706
LAD		 5291}
5292
a13f316e
LAD		 5293static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn,
5294 u8 reason)
d0b13706
LAD		 5295{
5296 if (conn->type == LE_LINK)
a13f316e 5297 return hci_le_connect_cancel_sync(hdev, conn, reason);
d0b13706 5298
04a51d61
LAD		 5299 if (conn->type == ISO_LINK) {
5300 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
5301 * page 1857:
5302 *
5303 * If this command is issued for a CIS on the Central and the
5304 * CIS is successfully terminated before being established,
5305 * then an HCI_LE_CIS_Established event shall also be sent for
5306 * this CIS with the Status Operation Cancelled by Host (0x44).
5307 */
5308 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
5309 return hci_disconnect_sync(hdev, conn, reason);
5310
2889bdd0
PV		 5311 /* CIS with no Create CIS sent have nothing to cancel */
5312 if (bacmp(&conn->dst, BDADDR_ANY))
5313 return HCI_ERROR_LOCAL_HOST_TERM;
5314
04a51d61
LAD		 5315 /* There is no way to cancel a BIS without terminating the BIG
5316 * which is done later on connection cleanup.
5317 */
5318 return 0;
5319 }
5320
d0b13706
LAD		 5321 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
5322 return 0;
5323
094e3639
LAD		 5324 /* Wait for HCI_EV_CONN_COMPLETE, not HCI_EV_CMD_STATUS, when the
5325 * reason is anything but HCI_ERROR_REMOTE_POWER_OFF. This reason is
5326 * used when suspending or powering off, where we don't want to wait
5327 * for the peer's response.
5328 */
5329 if (reason != HCI_ERROR_REMOTE_POWER_OFF)
5330 return __hci_cmd_sync_status_sk(hdev, HCI_OP_CREATE_CONN_CANCEL,
5331 6, &conn->dst,
5332 HCI_EV_CONN_COMPLETE,
5333 HCI_CMD_TIMEOUT, NULL);
5334
d0b13706
LAD		 5335 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
5336 6, &conn->dst, HCI_CMD_TIMEOUT);
5337}
5338
5339static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
5340 u8 reason)
5341{
5342 struct hci_cp_reject_sync_conn_req cp;
5343
5344 memset(&cp, 0, sizeof(cp));
5345 bacpy(&cp.bdaddr, &conn->dst);
5346 cp.reason = reason;
5347
5348 /* SCO rejection has its own limited set of
5349 * allowed error values (0x0D-0x0F).
5350 */
5351 if (reason < 0x0d || reason > 0x0f)
5352 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
5353
5354 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
5355 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5356}
5357
04a51d61
LAD		 5358static int hci_le_reject_cis_sync(struct hci_dev *hdev, struct hci_conn *conn,
5359 u8 reason)
5360{
5361 struct hci_cp_le_reject_cis cp;
5362
5363 memset(&cp, 0, sizeof(cp));
5364 cp.handle = cpu_to_le16(conn->handle);
5365 cp.reason = reason;
5366
5367 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REJECT_CIS,
5368 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5369}
5370
d0b13706
LAD		 5371static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
5372 u8 reason)
5373{
5374 struct hci_cp_reject_conn_req cp;
5375
04a51d61
LAD		 5376 if (conn->type == ISO_LINK)
5377 return hci_le_reject_cis_sync(hdev, conn, reason);
5378
d0b13706
LAD		 5379 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
5380 return hci_reject_sco_sync(hdev, conn, reason);
5381
5382 memset(&cp, 0, sizeof(cp));
5383 bacpy(&cp.bdaddr, &conn->dst);
5384 cp.reason = reason;
5385
5386 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
5387 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5388}
5389
1f7435c8 5390int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
d0b13706 5391{
9b3628d7
LAD		 5392 int err;
5393
d0b13706
LAD		 5394 switch (conn->state) {
5395 case BT_CONNECTED:
5396 case BT_CONFIG:
5397 return hci_disconnect_sync(hdev, conn, reason);
5398 case BT_CONNECT:
a13f316e 5399 err = hci_connect_cancel_sync(hdev, conn, reason);
9b3628d7 5400 /* Cleanup hci_conn object if it cannot be cancelled as it
a13f316e
LAD		 5401 * likelly means the controller and host stack are out of sync
5402 * or in case of LE it was still scanning so it can be cleanup
5403 * safely.
9b3628d7 5404 */
b8288548
ZJ		 5405 if (err) {
5406 hci_dev_lock(hdev);
9b3628d7 5407 hci_conn_failed(conn, err);
b8288548
ZJ		 5408 hci_dev_unlock(hdev);
5409 }
9b3628d7 5410 return err;
d0b13706
LAD		 5411 case BT_CONNECT2:
5412 return hci_reject_conn_sync(hdev, conn, reason);
f777d882 5413 case BT_OPEN:
2889bdd0
PV		 5414 case BT_BOUND:
5415 hci_dev_lock(hdev);
5416 hci_conn_failed(conn, reason);
5417 hci_dev_unlock(hdev);
5418 return 0;
d0b13706
LAD		 5419 default:
5420 conn->state = BT_CLOSED;
5421 break;
5422 }
5423
5424 return 0;
5425}
5426
182ee45d
LAD		 5427static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
5428{
5429 struct hci_conn *conn, *tmp;
5430 int err;
5431
5432 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
5433 err = hci_abort_conn_sync(hdev, conn, reason);
5434 if (err)
5435 return err;
5436 }
5437
8cd3c55c 5438 return 0;
182ee45d
LAD		 5439}
5440
d0b13706
LAD		 5441/* This function perform power off HCI command sequence as follows:
5442 *
5443 * Clear Advertising
5444 * Stop Discovery
5445 * Disconnect all connections
5446 * hci_dev_close_sync
5447 */
5448static int hci_power_off_sync(struct hci_dev *hdev)
5449{
d0b13706
LAD		 5450 int err;
5451
5452 /* If controller is already down there is nothing to do */
5453 if (!test_bit(HCI_UP, &hdev->flags))
5454 return 0;
5455
5456 if (test_bit(HCI_ISCAN, &hdev->flags) ||
5457 test_bit(HCI_PSCAN, &hdev->flags)) {
5458 err = hci_write_scan_enable_sync(hdev, 0x00);
5459 if (err)
5460 return err;
5461 }
5462
5463 err = hci_clear_adv_sync(hdev, NULL, false);
5464 if (err)
5465 return err;
5466
5467 err = hci_stop_discovery_sync(hdev);
5468 if (err)
5469 return err;
5470
182ee45d
LAD		 5471 /* Terminated due to Power Off */
5472 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5473 if (err)
5474 return err;
d0b13706
LAD		 5475
5476 return hci_dev_close_sync(hdev);
5477}
5478
5479int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
5480{
5481 if (val)
5482 return hci_power_on_sync(hdev);
cf75ad8b
LAD		 5483
5484 return hci_power_off_sync(hdev);
5485}
abfeea47 5486
2bd1b237
LAD		 5487static int hci_write_iac_sync(struct hci_dev *hdev)
5488{
5489 struct hci_cp_write_current_iac_lap cp;
5490
5491 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
5492 return 0;
5493
5494 memset(&cp, 0, sizeof(cp));
5495
5496 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
5497 /* Limited discoverable mode */
5498 cp.num_iac = min_t(u8, hdev->num_iac, 2);
5499 cp.iac_lap[0] = 0x00; /* LIAC */
5500 cp.iac_lap[1] = 0x8b;
5501 cp.iac_lap[2] = 0x9e;
5502 cp.iac_lap[3] = 0x33; /* GIAC */
5503 cp.iac_lap[4] = 0x8b;
5504 cp.iac_lap[5] = 0x9e;
5505 } else {
5506 /* General discoverable mode */
5507 cp.num_iac = 1;
5508 cp.iac_lap[0] = 0x33; /* GIAC */
5509 cp.iac_lap[1] = 0x8b;
5510 cp.iac_lap[2] = 0x9e;
5511 }
5512
5513 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
5514 (cp.num_iac * 3) + 1, &cp,
5515 HCI_CMD_TIMEOUT);
5516}
5517
5518int hci_update_discoverable_sync(struct hci_dev *hdev)
5519{
5520 int err = 0;
5521
5522 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
5523 err = hci_write_iac_sync(hdev);
5524 if (err)
5525 return err;
5526
5527 err = hci_update_scan_sync(hdev);
5528 if (err)
5529 return err;
5530
5531 err = hci_update_class_sync(hdev);
5532 if (err)
5533 return err;
5534 }
5535
5536 /* Advertising instances don't use the global discoverable setting, so
5537 * only update AD if advertising was enabled using Set Advertising.
5538 */
5539 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
5540 err = hci_update_adv_data_sync(hdev, 0x00);
5541 if (err)
5542 return err;
5543
5544 /* Discoverable mode affects the local advertising
5545 * address in limited privacy mode.
5546 */
5547 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
5548 if (ext_adv_capable(hdev))
5549 err = hci_start_ext_adv_sync(hdev, 0x00);
5550 else
5551 err = hci_enable_advertising_sync(hdev);
5552 }
5553 }
5554
5555 return err;
5556}
5557
5558static int update_discoverable_sync(struct hci_dev *hdev, void *data)
5559{
5560 return hci_update_discoverable_sync(hdev);
5561}
5562
5563int hci_update_discoverable(struct hci_dev *hdev)
5564{
5565 /* Only queue if it would have any effect */
5566 if (hdev_is_powered(hdev) &&
5567 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
5568 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
5569 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
5570 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
5571 NULL);
5572
5573 return 0;
5574}
5575
f056a657
LAD		 5576int hci_update_connectable_sync(struct hci_dev *hdev)
5577{
5578 int err;
5579
5580 err = hci_update_scan_sync(hdev);
5581 if (err)
5582 return err;
5583
5584 /* If BR/EDR is not enabled and we disable advertising as a
5585 * by-product of disabling connectable, we need to update the
5586 * advertising flags.
5587 */
5588 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5589 err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
5590
5591 /* Update the advertising parameters if necessary */
5592 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
5593 !list_empty(&hdev->adv_instances)) {
5594 if (ext_adv_capable(hdev))
5595 err = hci_start_ext_adv_sync(hdev,
5596 hdev->cur_adv_instance);
5597 else
5598 err = hci_enable_advertising_sync(hdev);
5599
5600 if (err)
5601 return err;
5602 }
5603
5604 return hci_update_passive_scan_sync(hdev);
5605}
5606
abfeea47
LAD		 5607static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
5608{
5609 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
5610 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
5611 struct hci_cp_inquiry cp;
5612
5613 bt_dev_dbg(hdev, "");
5614
5615 if (hci_dev_test_flag(hdev, HCI_INQUIRY))
5616 return 0;
5617
5618 hci_dev_lock(hdev);
5619 hci_inquiry_cache_flush(hdev);
5620 hci_dev_unlock(hdev);
5621
5622 memset(&cp, 0, sizeof(cp));
5623
5624 if (hdev->discovery.limited)
5625 memcpy(&cp.lap, liac, sizeof(cp.lap));
5626 else
5627 memcpy(&cp.lap, giac, sizeof(cp.lap));
5628
5629 cp.length = length;
5630
5631 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
5632 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5633}
5634
5635static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
5636{
5637 u8 own_addr_type;
5638 /* Accept list is not used for discovery */
5639 u8 filter_policy = 0x00;
5640 /* Default is to enable duplicates filter */
5641 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
5642 int err;
5643
5644 bt_dev_dbg(hdev, "");
5645
5646 /* If controller is scanning, it means the passive scanning is
5647 * running. Thus, we should temporarily stop it in order to set the
5648 * discovery scanning parameters.
5649 */
5650 err = hci_scan_disable_sync(hdev);
5651 if (err) {
5652 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
5653 return err;
5654 }
5655
5656 cancel_interleave_scan(hdev);
5657
3c44a431
ZJ		 5658 /* Pause address resolution for active scan and stop advertising if
5659 * privacy is enabled.
abfeea47 5660 */
3c44a431
ZJ		 5661 err = hci_pause_addr_resolution(hdev);
5662 if (err)
abfeea47 5663 goto failed;
abfeea47
LAD		 5664
5665 /* All active scans will be done with either a resolvable private
5666 * address (when privacy feature has been enabled) or non-resolvable
5667 * private address.
5668 */
5669 err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
5670 &own_addr_type);
5671 if (err < 0)
5672 own_addr_type = ADDR_LE_DEV_PUBLIC;
5673
5674 if (hci_is_adv_monitoring(hdev)) {
5675 /* Duplicate filter should be disabled when some advertisement
5676 * monitor is activated, otherwise AdvMon can only receive one
5677 * advertisement for one peer(*) during active scanning, and
5678 * might report loss to these peers.
5679 *
5680 * Note that different controllers have different meanings of
5681 * |duplicate|. Some of them consider packets with the same
5682 * address as duplicate, and others consider packets with the
5683 * same address and the same RSSI as duplicate. Although in the
5684 * latter case we don't need to disable duplicate filter, but
5685 * it is common to have active scanning for a short period of
5686 * time, the power impact should be neglectable.
5687 */
5688 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
5689 }
5690
5691 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
5692 hdev->le_scan_window_discovery,
5693 own_addr_type, filter_policy, filter_dup);
5694 if (!err)
5695 return err;
5696
5697failed:
5698 /* Resume advertising if it was paused */
5699 if (use_ll_privacy(hdev))
5700 hci_resume_advertising_sync(hdev);
5701
5702 /* Resume passive scanning */
5703 hci_update_passive_scan_sync(hdev);
5704 return err;
5705}
5706
5707static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
5708{
5709 int err;
5710
5711 bt_dev_dbg(hdev, "");
5712
5713 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
5714 if (err)
5715 return err;
5716
5717 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5718}
5719
5720int hci_start_discovery_sync(struct hci_dev *hdev)
5721{
5722 unsigned long timeout;
5723 int err;
5724
5725 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
5726
5727 switch (hdev->discovery.type) {
5728 case DISCOV_TYPE_BREDR:
5729 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
5730 case DISCOV_TYPE_INTERLEAVED:
5731 /* When running simultaneous discovery, the LE scanning time
5732 * should occupy the whole discovery time sine BR/EDR inquiry
5733 * and LE scanning are scheduled by the controller.
5734 *
5735 * For interleaving discovery in comparison, BR/EDR inquiry
5736 * and LE scanning are done sequentially with separate
5737 * timeouts.
5738 */
5739 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
5740 &hdev->quirks)) {
5741 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5742 /* During simultaneous discovery, we double LE scan
5743 * interval. We must leave some time for the controller
5744 * to do BR/EDR inquiry.
5745 */
5746 err = hci_start_interleaved_discovery_sync(hdev);
5747 break;
5748 }
5749
5750 timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
5751 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5752 break;
5753 case DISCOV_TYPE_LE:
5754 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
5755 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
5756 break;
5757 default:
5758 return -EINVAL;
5759 }
5760
5761 if (err)
5762 return err;
5763
5764 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
5765
5766 /* When service discovery is used and the controller has a
5767 * strict duplicate filter, it is important to remember the
5768 * start and duration of the scan. This is required for
5769 * restarting scanning during the discovery phase.
5770 */
5771 if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
5772 hdev->discovery.result_filtering) {
5773 hdev->discovery.scan_start = jiffies;
5774 hdev->discovery.scan_duration = timeout;
5775 }
5776
5777 queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
5778 timeout);
abfeea47
LAD		 5779 return 0;
5780}
182ee45d
LAD		 5781
5782static void hci_suspend_monitor_sync(struct hci_dev *hdev)
5783{
5784 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5785 case HCI_ADV_MONITOR_EXT_MSFT:
5786 msft_suspend_sync(hdev);
5787 break;
5788 default:
5789 return;
5790 }
5791}
5792
5793/* This function disables discovery and mark it as paused */
5794static int hci_pause_discovery_sync(struct hci_dev *hdev)
5795{
5796 int old_state = hdev->discovery.state;
5797 int err;
5798
5799 /* If discovery already stopped/stopping/paused there nothing to do */
5800 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
5801 hdev->discovery_paused)
5802 return 0;
5803
5804 hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
5805 err = hci_stop_discovery_sync(hdev);
5806 if (err)
5807 return err;
5808
5809 hdev->discovery_paused = true;
5810 hdev->discovery_old_state = old_state;
5811 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
5812
5813 return 0;
5814}
5815
5816static int hci_update_event_filter_sync(struct hci_dev *hdev)
5817{
5818 struct bdaddr_list_with_flags *b;
5819 u8 scan = SCAN_DISABLED;
5820 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
5821 int err;
5822
5823 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
5824 return 0;
5825
0eaecfb2
IFM		 5826 /* Some fake CSR controllers lock up after setting this type of
5827 * filter, so avoid sending the request altogether.
5828 */
5829 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
5830 return 0;
5831
182ee45d
LAD		 5832 /* Always clear event filter when starting */
5833 hci_clear_event_filter_sync(hdev);
5834
5835 list_for_each_entry(b, &hdev->accept_list, list) {
e1cff700 5836 if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
182ee45d
LAD		 5837 continue;
5838
5839 bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
5840
5841 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
5842 HCI_CONN_SETUP_ALLOW_BDADDR,
5843 &b->bdaddr,
5844 HCI_CONN_SETUP_AUTO_ON);
5845 if (err)
5846 bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
5847 &b->bdaddr);
5848 else
5849 scan = SCAN_PAGE;
5850 }
5851
5852 if (scan && !scanning)
5853 hci_write_scan_enable_sync(hdev, scan);
5854 else if (!scan && scanning)
5855 hci_write_scan_enable_sync(hdev, scan);
5856
5857 return 0;
5858}
5859
3b420553
LAD		 5860/* This function disables scan (BR and LE) and mark it as paused */
5861static int hci_pause_scan_sync(struct hci_dev *hdev)
5862{
5863 if (hdev->scanning_paused)
5864 return 0;
5865
5866 /* Disable page scan if enabled */
5867 if (test_bit(HCI_PSCAN, &hdev->flags))
5868 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
5869
5870 hci_scan_disable_sync(hdev);
5871
5872 hdev->scanning_paused = true;
5873
5874 return 0;
5875}
5876
182ee45d
LAD		 5877/* This function performs the HCI suspend procedures in the follow order:
5878 *
5879 * Pause discovery (active scanning/inquiry)
5880 * Pause Directed Advertising/Advertising
3b420553 5881 * Pause Scanning (passive scanning in case discovery was not active)
182ee45d
LAD		 5882 * Disconnect all connections
5883 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
5884 * otherwise:
5885 * Update event mask (only set events that are allowed to wake up the host)
5886 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
5887 * Update passive scanning (lower duty cycle)
5888 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
5889 */
5890int hci_suspend_sync(struct hci_dev *hdev)
5891{
5892 int err;
5893
5894 /* If marked as suspended there nothing to do */
5895 if (hdev->suspended)
5896 return 0;
5897
5898 /* Mark device as suspended */
5899 hdev->suspended = true;
5900
5901 /* Pause discovery if not already stopped */
5902 hci_pause_discovery_sync(hdev);
5903
5904 /* Pause other advertisements */
5905 hci_pause_advertising_sync(hdev);
5906
182ee45d
LAD		 5907 /* Suspend monitor filters */
5908 hci_suspend_monitor_sync(hdev);
5909
5910 /* Prevent disconnects from causing scanning to be re-enabled */
3b420553 5911 hci_pause_scan_sync(hdev);
182ee45d 5912
123f6d3a
LAD		 5913 if (hci_conn_count(hdev)) {
5914 /* Soft disconnect everything (power off) */
5915 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
5916 if (err) {
5917 /* Set state to BT_RUNNING so resume doesn't notify */
5918 hdev->suspend_state = BT_RUNNING;
5919 hci_resume_sync(hdev);
5920 return err;
5921 }
182ee45d 5922
123f6d3a
LAD		 5923 /* Update event mask so only the allowed event can wakeup the
5924 * host.
5925 */
5926 hci_set_event_mask_sync(hdev);
5927 }
ef61b6ea 5928
182ee45d
LAD		 5929 /* Only configure accept list if disconnect succeeded and wake
5930 * isn't being prevented.
5931 */
5932 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
5933 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
5934 return 0;
5935 }
5936
5937 /* Unpause to take care of updating scanning params */
5938 hdev->scanning_paused = false;
5939
182ee45d
LAD		 5940 /* Enable event filter for paired devices */
5941 hci_update_event_filter_sync(hdev);
5942
5943 /* Update LE passive scan if enabled */
5944 hci_update_passive_scan_sync(hdev);
5945
5946 /* Pause scan changes again. */
5947 hdev->scanning_paused = true;
5948
5949 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
5950
5951 return 0;
5952}
5953
5954/* This function resumes discovery */
5955static int hci_resume_discovery_sync(struct hci_dev *hdev)
5956{
5957 int err;
5958
5959 /* If discovery not paused there nothing to do */
5960 if (!hdev->discovery_paused)
5961 return 0;
5962
5963 hdev->discovery_paused = false;
5964
5965 hci_discovery_set_state(hdev, DISCOVERY_STARTING);
5966
5967 err = hci_start_discovery_sync(hdev);
5968
5969 hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
5970 DISCOVERY_FINDING);
5971
5972 return err;
5973}
5974
5975static void hci_resume_monitor_sync(struct hci_dev *hdev)
5976{
5977 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5978 case HCI_ADV_MONITOR_EXT_MSFT:
5979 msft_resume_sync(hdev);
5980 break;
5981 default:
5982 return;
5983 }
5984}
5985
3b420553
LAD		 5986/* This function resume scan and reset paused flag */
5987static int hci_resume_scan_sync(struct hci_dev *hdev)
5988{
5989 if (!hdev->scanning_paused)
5990 return 0;
5991
68253f3c
ZJ		 5992 hdev->scanning_paused = false;
5993
3b420553
LAD		 5994 hci_update_scan_sync(hdev);
5995
5996 /* Reset passive scanning to normal */
5997 hci_update_passive_scan_sync(hdev);
5998
3b420553
LAD		 5999 return 0;
6000}
6001
182ee45d
LAD		 6002/* This function performs the HCI suspend procedures in the follow order:
6003 *
6004 * Restore event mask
6005 * Clear event filter
6006 * Update passive scanning (normal duty cycle)
6007 * Resume Directed Advertising/Advertising
6008 * Resume discovery (active scanning/inquiry)
6009 */
6010int hci_resume_sync(struct hci_dev *hdev)
6011{
6012 /* If not marked as suspended there nothing to do */
6013 if (!hdev->suspended)
6014 return 0;
6015
6016 hdev->suspended = false;
182ee45d
LAD		 6017
6018 /* Restore event mask */
6019 hci_set_event_mask_sync(hdev);
6020
6021 /* Clear any event filters and restore scan state */
6022 hci_clear_event_filter_sync(hdev);
182ee45d 6023
3b420553
LAD		 6024 /* Resume scanning */
6025 hci_resume_scan_sync(hdev);
182ee45d
LAD		 6026
6027 /* Resume monitor filters */
6028 hci_resume_monitor_sync(hdev);
6029
6030 /* Resume other advertisements */
6031 hci_resume_advertising_sync(hdev);
6032
6033 /* Resume discovery */
6034 hci_resume_discovery_sync(hdev);
6035
6036 return 0;
6037}
8e8b92ee
LAD		 6038
6039static bool conn_use_rpa(struct hci_conn *conn)
6040{
6041 struct hci_dev *hdev = conn->hdev;
6042
6043 return hci_dev_test_flag(hdev, HCI_PRIVACY);
6044}
6045
6046static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
6047 struct hci_conn *conn)
6048{
6049 struct hci_cp_le_set_ext_adv_params cp;
6050 int err;
6051 bdaddr_t random_addr;
6052 u8 own_addr_type;
6053
6054 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6055 &own_addr_type);
6056 if (err)
6057 return err;
6058
6059 /* Set require_privacy to false so that the remote device has a
6060 * chance of identifying us.
6061 */
6062 err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
6063 &own_addr_type, &random_addr);
6064 if (err)
6065 return err;
6066
6067 memset(&cp, 0, sizeof(cp));
6068
6069 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
8e8b92ee
LAD		 6070 cp.channel_map = hdev->le_adv_channel_map;
6071 cp.tx_power = HCI_TX_POWER_INVALID;
6072 cp.primary_phy = HCI_ADV_PHY_1M;
6073 cp.secondary_phy = HCI_ADV_PHY_1M;
6074 cp.handle = 0x00; /* Use instance 0 for directed adv */
6075 cp.own_addr_type = own_addr_type;
6076 cp.peer_addr_type = conn->dst_type;
6077 bacpy(&cp.peer_addr, &conn->dst);
6078
6079 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
6080 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
6081 * does not supports advertising data when the advertising set already
6082 * contains some, the controller shall return erroc code 'Invalid
6083 * HCI Command Parameters(0x12).
6084 * So it is required to remove adv set for handle 0x00. since we use
6085 * instance 0 for directed adv.
6086 */
6087 err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
6088 if (err)
6089 return err;
6090
6091 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
6092 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6093 if (err)
6094 return err;
6095
6096 /* Check if random address need to be updated */
6097 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
6098 bacmp(&random_addr, BDADDR_ANY) &&
6099 bacmp(&random_addr, &hdev->random_addr)) {
6100 err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
6101 &random_addr);
6102 if (err)
6103 return err;
6104 }
6105
6106 return hci_enable_ext_advertising_sync(hdev, 0x00);
6107}
6108
6109static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
6110 struct hci_conn *conn)
6111{
6112 struct hci_cp_le_set_adv_param cp;
6113 u8 status;
6114 u8 own_addr_type;
6115 u8 enable;
6116
6117 if (ext_adv_capable(hdev))
6118 return hci_le_ext_directed_advertising_sync(hdev, conn);
6119
6120 /* Clear the HCI_LE_ADV bit temporarily so that the
6121 * hci_update_random_address knows that it's safe to go ahead
6122 * and write a new random address. The flag will be set back on
6123 * as soon as the SET_ADV_ENABLE HCI command completes.
6124 */
6125 hci_dev_clear_flag(hdev, HCI_LE_ADV);
6126
6127 /* Set require_privacy to false so that the remote device has a
6128 * chance of identifying us.
6129 */
6130 status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6131 &own_addr_type);
6132 if (status)
6133 return status;
6134
6135 memset(&cp, 0, sizeof(cp));
6136
6137 /* Some controllers might reject command if intervals are not
6138 * within range for undirected advertising.
6139 * BCM20702A0 is known to be affected by this.
6140 */
6141 cp.min_interval = cpu_to_le16(0x0020);
6142 cp.max_interval = cpu_to_le16(0x0020);
6143
6144 cp.type = LE_ADV_DIRECT_IND;
6145 cp.own_address_type = own_addr_type;
6146 cp.direct_addr_type = conn->dst_type;
6147 bacpy(&cp.direct_addr, &conn->dst);
6148 cp.channel_map = hdev->le_adv_channel_map;
6149
6150 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
6151 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6152 if (status)
6153 return status;
6154
6155 enable = 0x01;
6156
6157 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
6158 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
6159}
6160
6161static void set_ext_conn_params(struct hci_conn *conn,
6162 struct hci_cp_le_ext_conn_param *p)
6163{
6164 struct hci_dev *hdev = conn->hdev;
6165
6166 memset(p, 0, sizeof(*p));
6167
6168 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6169 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6170 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6171 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6172 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
6173 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6174 p->min_ce_len = cpu_to_le16(0x0000);
6175 p->max_ce_len = cpu_to_le16(0x0000);
6176}
6177
89a0b8b9
LAD		 6178static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
6179 struct hci_conn *conn, u8 own_addr_type)
8e8b92ee
LAD		 6180{
6181 struct hci_cp_le_ext_create_conn *cp;
6182 struct hci_cp_le_ext_conn_param *p;
6183 u8 data[sizeof(*cp) + sizeof(*p) * 3];
6184 u32 plen;
6185
6186 cp = (void *)data;
6187 p = (void *)cp->data;
6188
6189 memset(cp, 0, sizeof(*cp));
6190
6191 bacpy(&cp->peer_addr, &conn->dst);
6192 cp->peer_addr_type = conn->dst_type;
6193 cp->own_addr_type = own_addr_type;
6194
6195 plen = sizeof(*cp);
6196
6197 if (scan_1m(hdev)) {
6198 cp->phys |= LE_SCAN_PHY_1M;
6199 set_ext_conn_params(conn, p);
6200
6201 p++;
6202 plen += sizeof(*p);
6203 }
6204
6205 if (scan_2m(hdev)) {
6206 cp->phys |= LE_SCAN_PHY_2M;
6207 set_ext_conn_params(conn, p);
6208
6209 p++;
6210 plen += sizeof(*p);
6211 }
6212
6213 if (scan_coded(hdev)) {
6214 cp->phys |= LE_SCAN_PHY_CODED;
6215 set_ext_conn_params(conn, p);
6216
6217 plen += sizeof(*p);
6218 }
6219
6cd29ec6
LAD		 6220 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
6221 plen, data,
6222 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
a56a1138 6223 conn->conn_timeout, NULL);
8e8b92ee
LAD		 6224}
6225
6226int hci_le_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn)
6227{
6228 struct hci_cp_le_create_conn cp;
6229 struct hci_conn_params *params;
6230 u8 own_addr_type;
6231 int err;
6232
8e8b92ee
LAD		 6233 /* If requested to connect as peripheral use directed advertising */
6234 if (conn->role == HCI_ROLE_SLAVE) {
76d0685b
LAD		 6235 /* If we're active scanning and simultaneous roles is not
6236 * enabled simply reject the attempt.
8e8b92ee
LAD		 6237 */
6238 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
4fc9857a 6239 hdev->le_scan_type == LE_SCAN_ACTIVE &&
76d0685b 6240 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
8e8b92ee
LAD		 6241 hci_conn_del(conn);
6242 return -EBUSY;
6243 }
6244
4fc9857a
LAD		 6245 /* Pause advertising while doing directed advertising. */
6246 hci_pause_advertising_sync(hdev);
6247
8e8b92ee
LAD		 6248 err = hci_le_directed_advertising_sync(hdev, conn);
6249 goto done;
6250 }
6251
76d0685b
LAD		 6252 /* Disable advertising if simultaneous roles is not in use. */
6253 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
4fc9857a
LAD		 6254 hci_pause_advertising_sync(hdev);
6255
8e8b92ee
LAD		 6256 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
6257 if (params) {
6258 conn->le_conn_min_interval = params->conn_min_interval;
6259 conn->le_conn_max_interval = params->conn_max_interval;
6260 conn->le_conn_latency = params->conn_latency;
6261 conn->le_supv_timeout = params->supervision_timeout;
6262 } else {
6263 conn->le_conn_min_interval = hdev->le_conn_min_interval;
6264 conn->le_conn_max_interval = hdev->le_conn_max_interval;
6265 conn->le_conn_latency = hdev->le_conn_latency;
6266 conn->le_supv_timeout = hdev->le_supv_timeout;
6267 }
6268
6269 /* If controller is scanning, we stop it since some controllers are
6270 * not able to scan and connect at the same time. Also set the
6271 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
6272 * handler for scan disabling knows to set the correct discovery
6273 * state.
6274 */
6275 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
6276 hci_scan_disable_sync(hdev);
6277 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
6278 }
6279
6280 /* Update random address, but set require_privacy to false so
6281 * that we never connect with an non-resolvable address.
6282 */
6283 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
6284 &own_addr_type);
6285 if (err)
6286 goto done;
6287
6288 if (use_ext_conn(hdev)) {
6289 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
6290 goto done;
6291 }
6292
6293 memset(&cp, 0, sizeof(cp));
6294
6295 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
6296 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
6297
6298 bacpy(&cp.peer_addr, &conn->dst);
6299 cp.peer_addr_type = conn->dst_type;
6300 cp.own_address_type = own_addr_type;
6301 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
6302 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
6303 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
6304 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
6305 cp.min_ce_len = cpu_to_le16(0x0000);
6306 cp.max_ce_len = cpu_to_le16(0x0000);
6307
a56a1138
LAD		 6308 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
6309 *
6310 * If this event is unmasked and the HCI_LE_Connection_Complete event
6311 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
6312 * sent when a new connection has been created.
6313 */
6cd29ec6 6314 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
a56a1138
LAD		 6315 sizeof(cp), &cp,
6316 use_enhanced_conn_complete(hdev) ?
6317 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
6318 HCI_EV_LE_CONN_COMPLETE,
6319 conn->conn_timeout, NULL);
8e8b92ee
LAD		 6320
6321done:
b62e7220 6322 if (err == -ETIMEDOUT)
a13f316e 6323 hci_le_connect_cancel_sync(hdev, conn, 0x00);
b62e7220 6324
4fc9857a 6325 /* Re-enable advertising after the connection attempt is finished. */
8e8b92ee
LAD		 6326 hci_resume_advertising_sync(hdev);
6327 return err;
6328}
26afbd82 6329
7f74563e 6330int hci_le_create_cis_sync(struct hci_dev *hdev)
c09b80be
LAD		 6331{
6332 struct {
6333 struct hci_cp_le_create_cis cp;
6334 struct hci_cis cis[0x1f];
6335 } cmd;
7f74563e
PV		 6336 struct hci_conn *conn;
6337 u8 cig = BT_ISO_QOS_CIG_UNSET;
6338
6339 /* The spec allows only one pending LE Create CIS command at a time. If
6340 * the command is pending now, don't do anything. We check for pending
6341 * connections after each CIS Established event.
6342 *
6343 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6344 * page 2566:
6345 *
6346 * If the Host issues this command before all the
6347 * HCI_LE_CIS_Established events from the previous use of the
6348 * command have been generated, the Controller shall return the
6349 * error code Command Disallowed (0x0C).
6350 *
6351 * BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E
6352 * page 2567:
6353 *
6354 * When the Controller receives the HCI_LE_Create_CIS command, the
6355 * Controller sends the HCI_Command_Status event to the Host. An
6356 * HCI_LE_CIS_Established event will be generated for each CIS when it
6357 * is established or if it is disconnected or considered lost before
6358 * being established; until all the events are generated, the command
6359 * remains pending.
6360 */
c09b80be
LAD		 6361
6362 memset(&cmd, 0, sizeof(cmd));
c09b80be
LAD		 6363
6364 hci_dev_lock(hdev);
6365
6366 rcu_read_lock();
6367
7f74563e 6368 /* Wait until previous Create CIS has completed */
c09b80be 6369 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
7f74563e
PV		 6370 if (test_bit(HCI_CONN_CREATE_CIS, &conn->flags))
6371 goto done;
6372 }
c09b80be 6373
7f74563e
PV		 6374 /* Find CIG with all CIS ready */
6375 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6376 struct hci_conn *link;
6377
6378 if (hci_conn_check_create_cis(conn))
c09b80be
LAD		 6379 continue;
6380
7f74563e
PV		 6381 cig = conn->iso_qos.ucast.cig;
6382
6383 list_for_each_entry_rcu(link, &hdev->conn_hash.list, list) {
6384 if (hci_conn_check_create_cis(link) > 0 &&
6385 link->iso_qos.ucast.cig == cig &&
6386 link->state != BT_CONNECTED) {
6387 cig = BT_ISO_QOS_CIG_UNSET;
6388 break;
6389 }
c09b80be
LAD		 6390 }
6391
7f74563e
PV		 6392 if (cig != BT_ISO_QOS_CIG_UNSET)
6393 break;
6394 }
6395
6396 if (cig == BT_ISO_QOS_CIG_UNSET)
6397 goto done;
6398
6399 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6400 struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis];
6401
6402 if (hci_conn_check_create_cis(conn) ||
6403 conn->iso_qos.ucast.cig != cig)
6404 continue;
6405
6406 set_bit(HCI_CONN_CREATE_CIS, &conn->flags);
c09b80be
LAD		 6407 cis->acl_handle = cpu_to_le16(conn->parent->handle);
6408 cis->cis_handle = cpu_to_le16(conn->handle);
6409 cmd.cp.num_cis++;
7f74563e
PV		 6410
6411 if (cmd.cp.num_cis >= ARRAY_SIZE(cmd.cis))
6412 break;
c09b80be
LAD		 6413 }
6414
7f74563e 6415done:
c09b80be
LAD		 6416 rcu_read_unlock();
6417
6418 hci_dev_unlock(hdev);
6419
6420 if (!cmd.cp.num_cis)
6421 return 0;
6422
6423 /* Wait for HCI_LE_CIS_Established */
6424 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CIS,
6425 sizeof(cmd.cp) + sizeof(cmd.cis[0]) *
6426 cmd.cp.num_cis, &cmd,
6427 HCI_EVT_LE_CIS_ESTABLISHED,
6428 conn->conn_timeout, NULL);
6429}
6430
26afbd82
LAD		 6431int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle)
6432{
6433 struct hci_cp_le_remove_cig cp;
6434
6435 memset(&cp, 0, sizeof(cp));
6436 cp.cig_id = handle;
6437
6438 return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp),
6439 &cp, HCI_CMD_TIMEOUT);
6440}
eca0ae4a
LAD		 6441
6442int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle)
6443{
6444 struct hci_cp_le_big_term_sync cp;
6445
6446 memset(&cp, 0, sizeof(cp));
6447 cp.handle = handle;
6448
6449 return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC,
6450 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6451}
6452
6453int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
6454{
6455 struct hci_cp_le_pa_term_sync cp;
6456
6457 memset(&cp, 0, sizeof(cp));
6458 cp.handle = cpu_to_le16(handle);
6459
6460 return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
6461 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
6462}
3fe318ee
BG		 6463
6464int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
6465 bool use_rpa, struct adv_info *adv_instance,
6466 u8 *own_addr_type, bdaddr_t *rand_addr)
6467{
6468 int err;
6469
6470 bacpy(rand_addr, BDADDR_ANY);
6471
6472 /* If privacy is enabled use a resolvable private address. If
6473 * current RPA has expired then generate a new one.
6474 */
6475 if (use_rpa) {
6476 /* If Controller supports LL Privacy use own address type is
6477 * 0x03
6478 */
6479 if (use_ll_privacy(hdev))
6480 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
6481 else
6482 *own_addr_type = ADDR_LE_DEV_RANDOM;
6483
6484 if (adv_instance) {
6485 if (adv_rpa_valid(adv_instance))
6486 return 0;
6487 } else {
6488 if (rpa_valid(hdev))
6489 return 0;
6490 }
6491
6492 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
6493 if (err < 0) {
6494 bt_dev_err(hdev, "failed to generate new RPA");
6495 return err;
6496 }
6497
6498 bacpy(rand_addr, &hdev->rpa);
6499
6500 return 0;
6501 }
6502
6503 /* In case of required privacy without resolvable private address,
6504 * use an non-resolvable private address. This is useful for
6505 * non-connectable advertising.
6506 */
6507 if (require_privacy) {
6508 bdaddr_t nrpa;
6509
6510 while (true) {
6511 /* The non-resolvable private address is generated
6512 * from random six bytes with the two most significant
6513 * bits cleared.
6514 */
6515 get_random_bytes(&nrpa, 6);
6516 nrpa.b[5] &= 0x3f;
6517
6518 /* The non-resolvable private address shall not be
6519 * equal to the public address.
6520 */
6521 if (bacmp(&hdev->bdaddr, &nrpa))
6522 break;
6523 }
6524
6525 *own_addr_type = ADDR_LE_DEV_RANDOM;
6526 bacpy(rand_addr, &nrpa);
6527
6528 return 0;
6529 }
6530
6531 /* No privacy so use a public address. */
6532 *own_addr_type = ADDR_LE_DEV_PUBLIC;
6533
6534 return 0;
6535}
651cd3d6
BG		 6536
6537static int _update_adv_data_sync(struct hci_dev *hdev, void *data)
6538{
1ed8b37c 6539 u8 instance = PTR_ERR(data);
651cd3d6
BG		 6540
6541 return hci_update_adv_data_sync(hdev, instance);
6542}
6543
6544int hci_update_adv_data(struct hci_dev *hdev, u8 instance)
6545{
1ed8b37c
ZS		 6546 return hci_cmd_sync_queue(hdev, _update_adv_data_sync,
6547 ERR_PTR(instance), NULL);
651cd3d6 6548}
Linux 6.x block layer and io_uring tree(s)