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