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Merge tag 'gpio-fixes-for-v5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-block.git] / net / bluetooth / hci_sync.c
CommitLineData
6a98e383
MH		 1// SPDX-License-Identifier: GPL-2.0
2/*
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2021 Intel Corporation
6 */
7
d0b13706
LAD		 8#include <linux/property.h>
9
6a98e383
MH		 10#include <net/bluetooth/bluetooth.h>
11#include <net/bluetooth/hci_core.h>
12#include <net/bluetooth/mgmt.h>
13
14#include "hci_request.h"
d0b13706 15#include "hci_debugfs.h"
6a98e383 16#include "smp.h"
161510cc 17#include "eir.h"
d0b13706
LAD		 18#include "msft.h"
19#include "aosp.h"
20#include "leds.h"
6a98e383
MH		 21
22static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
23 struct sk_buff *skb)
24{
25 bt_dev_dbg(hdev, "result 0x%2.2x", result);
26
27 if (hdev->req_status != HCI_REQ_PEND)
28 return;
29
30 hdev->req_result = result;
31 hdev->req_status = HCI_REQ_DONE;
32
cba6b758
LAD		 33 if (skb) {
34 struct sock *sk = hci_skb_sk(skb);
35
36 /* Drop sk reference if set */
37 if (sk)
38 sock_put(sk);
39
40 hdev->req_skb = skb_get(skb);
41 }
42
6a98e383
MH		 43 wake_up_interruptible(&hdev->req_wait_q);
44}
45
46static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode,
47 u32 plen, const void *param,
48 struct sock *sk)
49{
50 int len = HCI_COMMAND_HDR_SIZE + plen;
51 struct hci_command_hdr *hdr;
52 struct sk_buff *skb;
53
54 skb = bt_skb_alloc(len, GFP_ATOMIC);
55 if (!skb)
56 return NULL;
57
58 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
59 hdr->opcode = cpu_to_le16(opcode);
60 hdr->plen = plen;
61
62 if (plen)
63 skb_put_data(skb, param, plen);
64
65 bt_dev_dbg(hdev, "skb len %d", skb->len);
66
67 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
68 hci_skb_opcode(skb) = opcode;
69
cba6b758
LAD		 70 /* Grab a reference if command needs to be associated with a sock (e.g.
71 * likely mgmt socket that initiated the command).
72 */
73 if (sk) {
74 hci_skb_sk(skb) = sk;
75 sock_hold(sk);
76 }
77
6a98e383
MH		 78 return skb;
79}
80
81static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
82 const void *param, u8 event, struct sock *sk)
83{
84 struct hci_dev *hdev = req->hdev;
85 struct sk_buff *skb;
86
87 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
88
89 /* If an error occurred during request building, there is no point in
90 * queueing the HCI command. We can simply return.
91 */
92 if (req->err)
93 return;
94
95 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
96 if (!skb) {
97 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
98 opcode);
99 req->err = -ENOMEM;
100 return;
101 }
102
103 if (skb_queue_empty(&req->cmd_q))
104 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
105
85b56857 106 hci_skb_event(skb) = event;
6a98e383
MH		 107
108 skb_queue_tail(&req->cmd_q, skb);
109}
110
111static int hci_cmd_sync_run(struct hci_request *req)
112{
113 struct hci_dev *hdev = req->hdev;
114 struct sk_buff *skb;
115 unsigned long flags;
116
117 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
118
119 /* If an error occurred during request building, remove all HCI
120 * commands queued on the HCI request queue.
121 */
122 if (req->err) {
123 skb_queue_purge(&req->cmd_q);
124 return req->err;
125 }
126
127 /* Do not allow empty requests */
128 if (skb_queue_empty(&req->cmd_q))
129 return -ENODATA;
130
131 skb = skb_peek_tail(&req->cmd_q);
132 bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete;
133 bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB;
134
135 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
136 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
137 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
138
139 queue_work(hdev->workqueue, &hdev->cmd_work);
140
141 return 0;
142}
143
144/* This function requires the caller holds hdev->req_lock. */
145struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
146 const void *param, u8 event, u32 timeout,
147 struct sock *sk)
148{
149 struct hci_request req;
150 struct sk_buff *skb;
151 int err = 0;
152
d0b13706 153 bt_dev_dbg(hdev, "Opcode 0x%4x", opcode);
6a98e383
MH		 154
155 hci_req_init(&req, hdev);
156
157 hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
158
159 hdev->req_status = HCI_REQ_PEND;
160
161 err = hci_cmd_sync_run(&req);
162 if (err < 0)
163 return ERR_PTR(err);
164
165 err = wait_event_interruptible_timeout(hdev->req_wait_q,
166 hdev->req_status != HCI_REQ_PEND,
167 timeout);
168
169 if (err == -ERESTARTSYS)
170 return ERR_PTR(-EINTR);
171
172 switch (hdev->req_status) {
173 case HCI_REQ_DONE:
174 err = -bt_to_errno(hdev->req_result);
175 break;
176
177 case HCI_REQ_CANCELED:
178 err = -hdev->req_result;
179 break;
180
181 default:
182 err = -ETIMEDOUT;
183 break;
184 }
185
186 hdev->req_status = 0;
187 hdev->req_result = 0;
188 skb = hdev->req_skb;
189 hdev->req_skb = NULL;
190
191 bt_dev_dbg(hdev, "end: err %d", err);
192
193 if (err < 0) {
194 kfree_skb(skb);
195 return ERR_PTR(err);
196 }
197
6a98e383
MH		 198 return skb;
199}
200EXPORT_SYMBOL(__hci_cmd_sync_sk);
201
202/* This function requires the caller holds hdev->req_lock. */
203struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
204 const void *param, u32 timeout)
205{
206 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
207}
208EXPORT_SYMBOL(__hci_cmd_sync);
209
210/* Send HCI command and wait for command complete event */
211struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
212 const void *param, u32 timeout)
213{
214 struct sk_buff *skb;
215
216 if (!test_bit(HCI_UP, &hdev->flags))
217 return ERR_PTR(-ENETDOWN);
218
219 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
220
221 hci_req_sync_lock(hdev);
222 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
223 hci_req_sync_unlock(hdev);
224
225 return skb;
226}
227EXPORT_SYMBOL(hci_cmd_sync);
228
229/* This function requires the caller holds hdev->req_lock. */
230struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
231 const void *param, u8 event, u32 timeout)
232{
233 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
234 NULL);
235}
236EXPORT_SYMBOL(__hci_cmd_sync_ev);
237
238/* This function requires the caller holds hdev->req_lock. */
239int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
240 const void *param, u8 event, u32 timeout,
241 struct sock *sk)
242{
243 struct sk_buff *skb;
244 u8 status;
245
246 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
abfeea47 247 if (IS_ERR(skb)) {
6a98e383
MH		 248 bt_dev_err(hdev, "Opcode 0x%4x failed: %ld", opcode,
249 PTR_ERR(skb));
250 return PTR_ERR(skb);
251 }
252
abfeea47
LAD		 253 /* If command return a status event skb will be set to NULL as there are
254 * no parameters, in case of failure IS_ERR(skb) would have be set to
255 * the actual error would be found with PTR_ERR(skb).
256 */
257 if (!skb)
258 return 0;
259
6a98e383
MH		 260 status = skb->data[0];
261
262 kfree_skb(skb);
263
264 return status;
265}
266EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
267
268int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
269 const void *param, u32 timeout)
270{
271 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
272 NULL);
273}
274EXPORT_SYMBOL(__hci_cmd_sync_status);
275
276static void hci_cmd_sync_work(struct work_struct *work)
277{
278 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
6a98e383
MH		 279
280 bt_dev_dbg(hdev, "");
281
008ee9eb
LAD		 282 /* Dequeue all entries and run them */
283 while (1) {
284 struct hci_cmd_sync_work_entry *entry;
6a98e383 285
008ee9eb
LAD		 286 mutex_lock(&hdev->cmd_sync_work_lock);
287 entry = list_first_entry_or_null(&hdev->cmd_sync_work_list,
288 struct hci_cmd_sync_work_entry,
289 list);
290 if (entry)
291 list_del(&entry->list);
292 mutex_unlock(&hdev->cmd_sync_work_lock);
6a98e383 293
008ee9eb
LAD		 294 if (!entry)
295 break;
6a98e383 296
008ee9eb 297 bt_dev_dbg(hdev, "entry %p", entry);
6a98e383 298
008ee9eb
LAD		 299 if (entry->func) {
300 int err;
6a98e383 301
008ee9eb
LAD		 302 hci_req_sync_lock(hdev);
303 err = entry->func(hdev, entry->data);
304 if (entry->destroy)
305 entry->destroy(hdev, entry->data, err);
306 hci_req_sync_unlock(hdev);
307 }
308
309 kfree(entry);
6a98e383
MH		 310 }
311}
312
744451c1
BB		 313static void hci_cmd_sync_cancel_work(struct work_struct *work)
314{
315 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
316
317 cancel_delayed_work_sync(&hdev->cmd_timer);
318 cancel_delayed_work_sync(&hdev->ncmd_timer);
319 atomic_set(&hdev->cmd_cnt, 1);
320
321 wake_up_interruptible(&hdev->req_wait_q);
322}
323
6a98e383
MH		 324void hci_cmd_sync_init(struct hci_dev *hdev)
325{
326 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
327 INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
328 mutex_init(&hdev->cmd_sync_work_lock);
744451c1
BB		 329
330 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
6a98e383
MH		 331}
332
333void hci_cmd_sync_clear(struct hci_dev *hdev)
334{
335 struct hci_cmd_sync_work_entry *entry, *tmp;
336
337 cancel_work_sync(&hdev->cmd_sync_work);
338
339 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
340 if (entry->destroy)
341 entry->destroy(hdev, entry->data, -ECANCELED);
342
343 list_del(&entry->list);
344 kfree(entry);
345 }
346}
347
744451c1 348void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
914b08b3
BB		 349{
350 bt_dev_dbg(hdev, "err 0x%2.2x", err);
351
352 if (hdev->req_status == HCI_REQ_PEND) {
353 hdev->req_result = err;
354 hdev->req_status = HCI_REQ_CANCELED;
355
356 cancel_delayed_work_sync(&hdev->cmd_timer);
357 cancel_delayed_work_sync(&hdev->ncmd_timer);
358 atomic_set(&hdev->cmd_cnt, 1);
359
360 wake_up_interruptible(&hdev->req_wait_q);
361 }
362}
744451c1
BB		 363
364void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
365{
366 bt_dev_dbg(hdev, "err 0x%2.2x", err);
367
368 if (hdev->req_status == HCI_REQ_PEND) {
369 hdev->req_result = err;
370 hdev->req_status = HCI_REQ_CANCELED;
371
372 queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
373 }
374}
914b08b3
BB		 375EXPORT_SYMBOL(hci_cmd_sync_cancel);
376
6a98e383
MH		 377int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
378 void *data, hci_cmd_sync_work_destroy_t destroy)
379{
380 struct hci_cmd_sync_work_entry *entry;
381
0b94f265
LAD		 382 if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
383 return -ENODEV;
384
6a98e383
MH		 385 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
386 if (!entry)
387 return -ENOMEM;
388
389 entry->func = func;
390 entry->data = data;
391 entry->destroy = destroy;
392
393 mutex_lock(&hdev->cmd_sync_work_lock);
394 list_add_tail(&entry->list, &hdev->cmd_sync_work_list);
395 mutex_unlock(&hdev->cmd_sync_work_lock);
396
397 queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
398
399 return 0;
400}
401EXPORT_SYMBOL(hci_cmd_sync_queue);
161510cc
LAD		 402
403int hci_update_eir_sync(struct hci_dev *hdev)
404{
405 struct hci_cp_write_eir cp;
406
407 bt_dev_dbg(hdev, "");
408
409 if (!hdev_is_powered(hdev))
410 return 0;
411
412 if (!lmp_ext_inq_capable(hdev))
413 return 0;
414
415 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
416 return 0;
417
418 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
419 return 0;
420
421 memset(&cp, 0, sizeof(cp));
422
423 eir_create(hdev, cp.data);
424
425 if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
426 return 0;
427
428 memcpy(hdev->eir, cp.data, sizeof(cp.data));
429
430 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
431 HCI_CMD_TIMEOUT);
432}
433
434static u8 get_service_classes(struct hci_dev *hdev)
435{
436 struct bt_uuid *uuid;
437 u8 val = 0;
438
439 list_for_each_entry(uuid, &hdev->uuids, list)
440 val |= uuid->svc_hint;
441
442 return val;
443}
444
445int hci_update_class_sync(struct hci_dev *hdev)
446{
447 u8 cod[3];
448
449 bt_dev_dbg(hdev, "");
450
451 if (!hdev_is_powered(hdev))
452 return 0;
453
454 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
455 return 0;
456
457 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
458 return 0;
459
460 cod[0] = hdev->minor_class;
461 cod[1] = hdev->major_class;
462 cod[2] = get_service_classes(hdev);
463
464 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
465 cod[1] |= 0x20;
466
467 if (memcmp(cod, hdev->dev_class, 3) == 0)
468 return 0;
469
470 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
471 sizeof(cod), cod, HCI_CMD_TIMEOUT);
472}
cba6b758
LAD		 473
474static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
475{
476 /* If there is no connection we are OK to advertise. */
477 if (hci_conn_num(hdev, LE_LINK) == 0)
478 return true;
479
480 /* Check le_states if there is any connection in peripheral role. */
481 if (hdev->conn_hash.le_num_peripheral > 0) {
482 /* Peripheral connection state and non connectable mode
483 * bit 20.
484 */
485 if (!connectable && !(hdev->le_states[2] & 0x10))
486 return false;
487
488 /* Peripheral connection state and connectable mode bit 38
489 * and scannable bit 21.
490 */
491 if (connectable && (!(hdev->le_states[4] & 0x40) ||
492 !(hdev->le_states[2] & 0x20)))
493 return false;
494 }
495
496 /* Check le_states if there is any connection in central role. */
497 if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) {
498 /* Central connection state and non connectable mode bit 18. */
499 if (!connectable && !(hdev->le_states[2] & 0x02))
500 return false;
501
502 /* Central connection state and connectable mode bit 35 and
503 * scannable 19.
504 */
505 if (connectable && (!(hdev->le_states[4] & 0x08) ||
506 !(hdev->le_states[2] & 0x08)))
507 return false;
508 }
509
510 return true;
511}
512
513static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
514{
515 /* If privacy is not enabled don't use RPA */
516 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
517 return false;
518
519 /* If basic privacy mode is enabled use RPA */
520 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
521 return true;
522
523 /* If limited privacy mode is enabled don't use RPA if we're
524 * both discoverable and bondable.
525 */
526 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
527 hci_dev_test_flag(hdev, HCI_BONDABLE))
528 return false;
529
530 /* We're neither bondable nor discoverable in the limited
531 * privacy mode, therefore use RPA.
532 */
533 return true;
534}
535
536static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
537{
538 /* If we're advertising or initiating an LE connection we can't
539 * go ahead and change the random address at this time. This is
540 * because the eventual initiator address used for the
541 * subsequently created connection will be undefined (some
542 * controllers use the new address and others the one we had
543 * when the operation started).
544 *
545 * In this kind of scenario skip the update and let the random
546 * address be updated at the next cycle.
547 */
548 if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
549 hci_lookup_le_connect(hdev)) {
550 bt_dev_dbg(hdev, "Deferring random address update");
551 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
552 return 0;
553 }
554
555 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
556 6, rpa, HCI_CMD_TIMEOUT);
557}
558
559int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
560 bool rpa, u8 *own_addr_type)
561{
562 int err;
563
564 /* If privacy is enabled use a resolvable private address. If
565 * current RPA has expired or there is something else than
566 * the current RPA in use, then generate a new one.
567 */
568 if (rpa) {
569 /* If Controller supports LL Privacy use own address type is
570 * 0x03
571 */
ad383c2c 572 if (use_ll_privacy(hdev))
cba6b758
LAD		 573 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
574 else
575 *own_addr_type = ADDR_LE_DEV_RANDOM;
576
577 /* Check if RPA is valid */
578 if (rpa_valid(hdev))
579 return 0;
580
581 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
582 if (err < 0) {
583 bt_dev_err(hdev, "failed to generate new RPA");
584 return err;
585 }
586
587 err = hci_set_random_addr_sync(hdev, &hdev->rpa);
588 if (err)
589 return err;
590
591 return 0;
592 }
593
594 /* In case of required privacy without resolvable private address,
595 * use an non-resolvable private address. This is useful for active
596 * scanning and non-connectable advertising.
597 */
598 if (require_privacy) {
599 bdaddr_t nrpa;
600
601 while (true) {
602 /* The non-resolvable private address is generated
603 * from random six bytes with the two most significant
604 * bits cleared.
605 */
606 get_random_bytes(&nrpa, 6);
607 nrpa.b[5] &= 0x3f;
608
609 /* The non-resolvable private address shall not be
610 * equal to the public address.
611 */
612 if (bacmp(&hdev->bdaddr, &nrpa))
613 break;
614 }
615
616 *own_addr_type = ADDR_LE_DEV_RANDOM;
617
618 return hci_set_random_addr_sync(hdev, &nrpa);
619 }
620
621 /* If forcing static address is in use or there is no public
622 * address use the static address as random address (but skip
623 * the HCI command if the current random address is already the
624 * static one.
625 *
626 * In case BR/EDR has been disabled on a dual-mode controller
627 * and a static address has been configured, then use that
628 * address instead of the public BR/EDR address.
629 */
630 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
631 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
632 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
633 bacmp(&hdev->static_addr, BDADDR_ANY))) {
634 *own_addr_type = ADDR_LE_DEV_RANDOM;
635 if (bacmp(&hdev->static_addr, &hdev->random_addr))
636 return hci_set_random_addr_sync(hdev,
637 &hdev->static_addr);
638 return 0;
639 }
640
641 /* Neither privacy nor static address is being used so use a
642 * public address.
643 */
644 *own_addr_type = ADDR_LE_DEV_PUBLIC;
645
646 return 0;
647}
648
649static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
650{
651 struct hci_cp_le_set_ext_adv_enable *cp;
652 struct hci_cp_ext_adv_set *set;
653 u8 data[sizeof(*cp) + sizeof(*set) * 1];
654 u8 size;
655
656 /* If request specifies an instance that doesn't exist, fail */
657 if (instance > 0) {
658 struct adv_info *adv;
659
660 adv = hci_find_adv_instance(hdev, instance);
661 if (!adv)
662 return -EINVAL;
663
664 /* If not enabled there is nothing to do */
665 if (!adv->enabled)
666 return 0;
667 }
668
669 memset(data, 0, sizeof(data));
670
671 cp = (void *)data;
672 set = (void *)cp->data;
673
674 /* Instance 0x00 indicates all advertising instances will be disabled */
675 cp->num_of_sets = !!instance;
676 cp->enable = 0x00;
677
678 set->handle = instance;
679
680 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
681
682 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
683 size, data, HCI_CMD_TIMEOUT);
684}
685
686static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
687 bdaddr_t *random_addr)
688{
689 struct hci_cp_le_set_adv_set_rand_addr cp;
690 int err;
691
692 if (!instance) {
693 /* Instance 0x00 doesn't have an adv_info, instead it uses
694 * hdev->random_addr to track its address so whenever it needs
695 * to be updated this also set the random address since
696 * hdev->random_addr is shared with scan state machine.
697 */
698 err = hci_set_random_addr_sync(hdev, random_addr);
699 if (err)
700 return err;
701 }
702
703 memset(&cp, 0, sizeof(cp));
704
705 cp.handle = instance;
706 bacpy(&cp.bdaddr, random_addr);
707
708 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
709 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
710}
711
712int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
713{
714 struct hci_cp_le_set_ext_adv_params cp;
715 bool connectable;
716 u32 flags;
717 bdaddr_t random_addr;
718 u8 own_addr_type;
719 int err;
720 struct adv_info *adv;
721 bool secondary_adv;
722
723 if (instance > 0) {
724 adv = hci_find_adv_instance(hdev, instance);
725 if (!adv)
726 return -EINVAL;
727 } else {
728 adv = NULL;
729 }
730
731 /* Updating parameters of an active instance will return a
732 * Command Disallowed error, so we must first disable the
733 * instance if it is active.
734 */
735 if (adv && !adv->pending) {
736 err = hci_disable_ext_adv_instance_sync(hdev, instance);
737 if (err)
738 return err;
739 }
740
741 flags = hci_adv_instance_flags(hdev, instance);
742
743 /* If the "connectable" instance flag was not set, then choose between
744 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
745 */
746 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
747 mgmt_get_connectable(hdev);
748
749 if (!is_advertising_allowed(hdev, connectable))
750 return -EPERM;
751
752 /* Set require_privacy to true only when non-connectable
753 * advertising is used. In that case it is fine to use a
754 * non-resolvable private address.
755 */
756 err = hci_get_random_address(hdev, !connectable,
757 adv_use_rpa(hdev, flags), adv,
758 &own_addr_type, &random_addr);
759 if (err < 0)
760 return err;
761
762 memset(&cp, 0, sizeof(cp));
763
764 if (adv) {
765 hci_cpu_to_le24(adv->min_interval, cp.min_interval);
766 hci_cpu_to_le24(adv->max_interval, cp.max_interval);
767 cp.tx_power = adv->tx_power;
768 } else {
769 hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval);
770 hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval);
771 cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE;
772 }
773
774 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
775
776 if (connectable) {
777 if (secondary_adv)
778 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
779 else
780 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND);
781 } else if (hci_adv_instance_is_scannable(hdev, instance) ||
782 (flags & MGMT_ADV_PARAM_SCAN_RSP)) {
783 if (secondary_adv)
784 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
785 else
786 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
787 } else {
788 if (secondary_adv)
789 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
790 else
791 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
792 }
793
cf75ad8b
LAD		 794 /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter
795 * contains the peer’s Identity Address and the Peer_Address_Type
796 * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01).
797 * These parameters are used to locate the corresponding local IRK in
798 * the resolving list; this IRK is used to generate their own address
799 * used in the advertisement.
800 */
801 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
802 hci_copy_identity_address(hdev, &cp.peer_addr,
803 &cp.peer_addr_type);
804
cba6b758
LAD		 805 cp.own_addr_type = own_addr_type;
806 cp.channel_map = hdev->le_adv_channel_map;
807 cp.handle = instance;
808
809 if (flags & MGMT_ADV_FLAG_SEC_2M) {
810 cp.primary_phy = HCI_ADV_PHY_1M;
811 cp.secondary_phy = HCI_ADV_PHY_2M;
812 } else if (flags & MGMT_ADV_FLAG_SEC_CODED) {
813 cp.primary_phy = HCI_ADV_PHY_CODED;
814 cp.secondary_phy = HCI_ADV_PHY_CODED;
815 } else {
816 /* In all other cases use 1M */
817 cp.primary_phy = HCI_ADV_PHY_1M;
818 cp.secondary_phy = HCI_ADV_PHY_1M;
819 }
820
821 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
822 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
823 if (err)
824 return err;
825
826 if ((own_addr_type == ADDR_LE_DEV_RANDOM ||
827 own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) &&
828 bacmp(&random_addr, BDADDR_ANY)) {
829 /* Check if random address need to be updated */
830 if (adv) {
831 if (!bacmp(&random_addr, &adv->random_addr))
832 return 0;
833 } else {
834 if (!bacmp(&random_addr, &hdev->random_addr))
835 return 0;
836 }
837
838 return hci_set_adv_set_random_addr_sync(hdev, instance,
839 &random_addr);
840 }
841
842 return 0;
843}
844
845static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
846{
847 struct {
848 struct hci_cp_le_set_ext_scan_rsp_data cp;
849 u8 data[HCI_MAX_EXT_AD_LENGTH];
850 } pdu;
851 u8 len;
852
853 memset(&pdu, 0, sizeof(pdu));
854
855 len = eir_create_scan_rsp(hdev, instance, pdu.data);
856
857 if (hdev->scan_rsp_data_len == len &&
858 !memcmp(pdu.data, hdev->scan_rsp_data, len))
859 return 0;
860
861 memcpy(hdev->scan_rsp_data, pdu.data, len);
862 hdev->scan_rsp_data_len = len;
863
864 pdu.cp.handle = instance;
865 pdu.cp.length = len;
866 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
867 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
868
869 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
870 sizeof(pdu.cp) + len, &pdu.cp,
871 HCI_CMD_TIMEOUT);
872}
873
874static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
875{
876 struct hci_cp_le_set_scan_rsp_data cp;
877 u8 len;
878
879 memset(&cp, 0, sizeof(cp));
880
881 len = eir_create_scan_rsp(hdev, instance, cp.data);
882
883 if (hdev->scan_rsp_data_len == len &&
884 !memcmp(cp.data, hdev->scan_rsp_data, len))
885 return 0;
886
887 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
888 hdev->scan_rsp_data_len = len;
889
890 cp.length = len;
891
892 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
893 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
894}
895
896int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
897{
898 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
899 return 0;
900
901 if (ext_adv_capable(hdev))
902 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
903
904 return __hci_set_scan_rsp_data_sync(hdev, instance);
905}
906
907int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
908{
909 struct hci_cp_le_set_ext_adv_enable *cp;
910 struct hci_cp_ext_adv_set *set;
911 u8 data[sizeof(*cp) + sizeof(*set) * 1];
912 struct adv_info *adv;
913
914 if (instance > 0) {
915 adv = hci_find_adv_instance(hdev, instance);
916 if (!adv)
917 return -EINVAL;
918 /* If already enabled there is nothing to do */
919 if (adv->enabled)
920 return 0;
921 } else {
922 adv = NULL;
923 }
924
925 cp = (void *)data;
926 set = (void *)cp->data;
927
928 memset(cp, 0, sizeof(*cp));
929
930 cp->enable = 0x01;
931 cp->num_of_sets = 0x01;
932
933 memset(set, 0, sizeof(*set));
934
935 set->handle = instance;
936
937 /* Set duration per instance since controller is responsible for
938 * scheduling it.
939 */
f16a491c 940 if (adv && adv->timeout) {
cba6b758
LAD		 941 u16 duration = adv->timeout * MSEC_PER_SEC;
942
943 /* Time = N * 10 ms */
944 set->duration = cpu_to_le16(duration / 10);
945 }
946
947 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
948 sizeof(*cp) +
949 sizeof(*set) * cp->num_of_sets,
950 data, HCI_CMD_TIMEOUT);
951}
952
953int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
954{
955 int err;
956
957 err = hci_setup_ext_adv_instance_sync(hdev, instance);
958 if (err)
959 return err;
960
961 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
962 if (err)
963 return err;
964
965 return hci_enable_ext_advertising_sync(hdev, instance);
966}
967
968static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
969{
970 int err;
971
972 if (ext_adv_capable(hdev))
973 return hci_start_ext_adv_sync(hdev, instance);
974
975 err = hci_update_adv_data_sync(hdev, instance);
976 if (err)
977 return err;
978
979 err = hci_update_scan_rsp_data_sync(hdev, instance);
980 if (err)
981 return err;
982
983 return hci_enable_advertising_sync(hdev);
984}
985
986int hci_enable_advertising_sync(struct hci_dev *hdev)
987{
988 struct adv_info *adv_instance;
989 struct hci_cp_le_set_adv_param cp;
990 u8 own_addr_type, enable = 0x01;
991 bool connectable;
992 u16 adv_min_interval, adv_max_interval;
993 u32 flags;
994 u8 status;
995
ad383c2c
LAD		 996 if (ext_adv_capable(hdev))
997 return hci_enable_ext_advertising_sync(hdev,
998 hdev->cur_adv_instance);
999
cba6b758
LAD		 1000 flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
1001 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
1002
1003 /* If the "connectable" instance flag was not set, then choose between
1004 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1005 */
1006 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1007 mgmt_get_connectable(hdev);
1008
1009 if (!is_advertising_allowed(hdev, connectable))
1010 return -EINVAL;
1011
ad383c2c
LAD		 1012 status = hci_disable_advertising_sync(hdev);
1013 if (status)
1014 return status;
cba6b758
LAD		 1015
1016 /* Clear the HCI_LE_ADV bit temporarily so that the
1017 * hci_update_random_address knows that it's safe to go ahead
1018 * and write a new random address. The flag will be set back on
1019 * as soon as the SET_ADV_ENABLE HCI command completes.
1020 */
1021 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1022
1023 /* Set require_privacy to true only when non-connectable
1024 * advertising is used. In that case it is fine to use a
1025 * non-resolvable private address.
1026 */
1027 status = hci_update_random_address_sync(hdev, !connectable,
1028 adv_use_rpa(hdev, flags),
1029 &own_addr_type);
1030 if (status)
1031 return status;
1032
1033 memset(&cp, 0, sizeof(cp));
1034
1035 if (adv_instance) {
1036 adv_min_interval = adv_instance->min_interval;
1037 adv_max_interval = adv_instance->max_interval;
1038 } else {
1039 adv_min_interval = hdev->le_adv_min_interval;
1040 adv_max_interval = hdev->le_adv_max_interval;
1041 }
1042
1043 if (connectable) {
1044 cp.type = LE_ADV_IND;
1045 } else {
1046 if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
1047 cp.type = LE_ADV_SCAN_IND;
1048 else
1049 cp.type = LE_ADV_NONCONN_IND;
1050
1051 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1052 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
1053 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
1054 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
1055 }
1056 }
1057
1058 cp.min_interval = cpu_to_le16(adv_min_interval);
1059 cp.max_interval = cpu_to_le16(adv_max_interval);
1060 cp.own_address_type = own_addr_type;
1061 cp.channel_map = hdev->le_adv_channel_map;
1062
1063 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
1064 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1065 if (status)
1066 return status;
1067
1068 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1069 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1070}
1071
abfeea47
LAD		 1072static int enable_advertising_sync(struct hci_dev *hdev, void *data)
1073{
1074 return hci_enable_advertising_sync(hdev);
1075}
1076
1077int hci_enable_advertising(struct hci_dev *hdev)
1078{
1079 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
1080 list_empty(&hdev->adv_instances))
1081 return 0;
1082
1083 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
1084}
1085
1086int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1087 struct sock *sk)
cba6b758
LAD		 1088{
1089 int err;
1090
1091 if (!ext_adv_capable(hdev))
1092 return 0;
1093
1094 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1095 if (err)
1096 return err;
1097
1098 /* If request specifies an instance that doesn't exist, fail */
1099 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
1100 return -EINVAL;
1101
1102 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
1103 sizeof(instance), &instance, 0,
1104 HCI_CMD_TIMEOUT, sk);
1105}
1106
1107static void cancel_adv_timeout(struct hci_dev *hdev)
1108{
1109 if (hdev->adv_instance_timeout) {
1110 hdev->adv_instance_timeout = 0;
1111 cancel_delayed_work(&hdev->adv_instance_expire);
1112 }
1113}
1114
1115static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1116{
1117 struct {
1118 struct hci_cp_le_set_ext_adv_data cp;
1119 u8 data[HCI_MAX_EXT_AD_LENGTH];
1120 } pdu;
1121 u8 len;
1122
1123 memset(&pdu, 0, sizeof(pdu));
1124
1125 len = eir_create_adv_data(hdev, instance, pdu.data);
1126
1127 /* There's nothing to do if the data hasn't changed */
1128 if (hdev->adv_data_len == len &&
1129 memcmp(pdu.data, hdev->adv_data, len) == 0)
1130 return 0;
1131
1132 memcpy(hdev->adv_data, pdu.data, len);
1133 hdev->adv_data_len = len;
1134
1135 pdu.cp.length = len;
1136 pdu.cp.handle = instance;
1137 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1138 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1139
1140 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1141 sizeof(pdu.cp) + len, &pdu.cp,
1142 HCI_CMD_TIMEOUT);
1143}
1144
1145static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1146{
1147 struct hci_cp_le_set_adv_data cp;
1148 u8 len;
1149
1150 memset(&cp, 0, sizeof(cp));
1151
1152 len = eir_create_adv_data(hdev, instance, cp.data);
1153
1154 /* There's nothing to do if the data hasn't changed */
1155 if (hdev->adv_data_len == len &&
1156 memcmp(cp.data, hdev->adv_data, len) == 0)
1157 return 0;
1158
1159 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1160 hdev->adv_data_len = len;
1161
1162 cp.length = len;
1163
1164 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1165 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1166}
1167
1168int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1169{
1170 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1171 return 0;
1172
1173 if (ext_adv_capable(hdev))
1174 return hci_set_ext_adv_data_sync(hdev, instance);
1175
1176 return hci_set_adv_data_sync(hdev, instance);
1177}
1178
1179int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1180 bool force)
1181{
1182 struct adv_info *adv = NULL;
1183 u16 timeout;
1184
cf75ad8b 1185 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
cba6b758
LAD		 1186 return -EPERM;
1187
1188 if (hdev->adv_instance_timeout)
1189 return -EBUSY;
1190
1191 adv = hci_find_adv_instance(hdev, instance);
1192 if (!adv)
1193 return -ENOENT;
1194
1195 /* A zero timeout means unlimited advertising. As long as there is
1196 * only one instance, duration should be ignored. We still set a timeout
1197 * in case further instances are being added later on.
1198 *
1199 * If the remaining lifetime of the instance is more than the duration
1200 * then the timeout corresponds to the duration, otherwise it will be
1201 * reduced to the remaining instance lifetime.
1202 */
1203 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
1204 timeout = adv->duration;
1205 else
1206 timeout = adv->remaining_time;
1207
1208 /* The remaining time is being reduced unless the instance is being
1209 * advertised without time limit.
1210 */
1211 if (adv->timeout)
1212 adv->remaining_time = adv->remaining_time - timeout;
1213
1214 /* Only use work for scheduling instances with legacy advertising */
1215 if (!ext_adv_capable(hdev)) {
1216 hdev->adv_instance_timeout = timeout;
1217 queue_delayed_work(hdev->req_workqueue,
1218 &hdev->adv_instance_expire,
1219 msecs_to_jiffies(timeout * 1000));
1220 }
1221
1222 /* If we're just re-scheduling the same instance again then do not
1223 * execute any HCI commands. This happens when a single instance is
1224 * being advertised.
1225 */
1226 if (!force && hdev->cur_adv_instance == instance &&
1227 hci_dev_test_flag(hdev, HCI_LE_ADV))
1228 return 0;
1229
1230 hdev->cur_adv_instance = instance;
1231
1232 return hci_start_adv_sync(hdev, instance);
1233}
1234
1235static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
1236{
1237 int err;
1238
1239 if (!ext_adv_capable(hdev))
1240 return 0;
1241
1242 /* Disable instance 0x00 to disable all instances */
1243 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1244 if (err)
1245 return err;
1246
1247 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
1248 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1249}
1250
1251static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
1252{
1253 struct adv_info *adv, *n;
1254
1255 if (ext_adv_capable(hdev))
1256 /* Remove all existing sets */
1257 return hci_clear_adv_sets_sync(hdev, sk);
1258
1259 /* This is safe as long as there is no command send while the lock is
1260 * held.
1261 */
1262 hci_dev_lock(hdev);
1263
1264 /* Cleanup non-ext instances */
1265 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1266 u8 instance = adv->instance;
1267 int err;
1268
1269 if (!(force || adv->timeout))
1270 continue;
1271
1272 err = hci_remove_adv_instance(hdev, instance);
1273 if (!err)
1274 mgmt_advertising_removed(sk, hdev, instance);
1275 }
1276
1277 hci_dev_unlock(hdev);
1278
1279 return 0;
1280}
1281
1282static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
1283 struct sock *sk)
1284{
1285 int err;
1286
1287 /* If we use extended advertising, instance has to be removed first. */
1288 if (ext_adv_capable(hdev))
1289 return hci_remove_ext_adv_instance_sync(hdev, instance, sk);
1290
1291 /* This is safe as long as there is no command send while the lock is
1292 * held.
1293 */
1294 hci_dev_lock(hdev);
1295
1296 err = hci_remove_adv_instance(hdev, instance);
1297 if (!err)
1298 mgmt_advertising_removed(sk, hdev, instance);
1299
1300 hci_dev_unlock(hdev);
1301
1302 return err;
1303}
1304
1305/* For a single instance:
1306 * - force == true: The instance will be removed even when its remaining
1307 * lifetime is not zero.
1308 * - force == false: the instance will be deactivated but kept stored unless
1309 * the remaining lifetime is zero.
1310 *
1311 * For instance == 0x00:
1312 * - force == true: All instances will be removed regardless of their timeout
1313 * setting.
1314 * - force == false: Only instances that have a timeout will be removed.
1315 */
1316int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
1317 u8 instance, bool force)
1318{
1319 struct adv_info *next = NULL;
1320 int err;
1321
1322 /* Cancel any timeout concerning the removed instance(s). */
1323 if (!instance || hdev->cur_adv_instance == instance)
1324 cancel_adv_timeout(hdev);
1325
1326 /* Get the next instance to advertise BEFORE we remove
1327 * the current one. This can be the same instance again
1328 * if there is only one instance.
1329 */
1330 if (hdev->cur_adv_instance == instance)
1331 next = hci_get_next_instance(hdev, instance);
1332
1333 if (!instance) {
1334 err = hci_clear_adv_sync(hdev, sk, force);
1335 if (err)
1336 return err;
1337 } else {
1338 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1339
1340 if (force || (adv && adv->timeout && !adv->remaining_time)) {
1341 /* Don't advertise a removed instance. */
1342 if (next && next->instance == instance)
1343 next = NULL;
1344
1345 err = hci_remove_adv_sync(hdev, instance, sk);
1346 if (err)
1347 return err;
1348 }
1349 }
1350
1351 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
1352 return 0;
1353
1354 if (next && !ext_adv_capable(hdev))
1355 hci_schedule_adv_instance_sync(hdev, next->instance, false);
1356
1357 return 0;
1358}
1359
47db6b42
BG		 1360int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
1361{
1362 struct hci_cp_read_rssi cp;
1363
1364 cp.handle = handle;
1365 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
1366 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1367}
1368
5a750137
BG		 1369int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
1370{
1371 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
1372 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
1373}
1374
47db6b42
BG		 1375int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
1376{
1377 struct hci_cp_read_tx_power cp;
1378
1379 cp.handle = handle;
1380 cp.type = type;
1381 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
1382 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1383}
1384
cba6b758
LAD		 1385int hci_disable_advertising_sync(struct hci_dev *hdev)
1386{
1387 u8 enable = 0x00;
1388
ad383c2c
LAD		 1389 /* If controller is not advertising we are done. */
1390 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
1391 return 0;
1392
cba6b758
LAD		 1393 if (ext_adv_capable(hdev))
1394 return hci_disable_ext_adv_instance_sync(hdev, 0x00);
1395
1396 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1397 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1398}
e8907f76
LAD		 1399
1400static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
1401 u8 filter_dup)
1402{
1403 struct hci_cp_le_set_ext_scan_enable cp;
1404
1405 memset(&cp, 0, sizeof(cp));
1406 cp.enable = val;
1407 cp.filter_dup = filter_dup;
1408
1409 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
1410 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1411}
1412
1413static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
1414 u8 filter_dup)
1415{
1416 struct hci_cp_le_set_scan_enable cp;
1417
1418 if (use_ext_scan(hdev))
1419 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
1420
1421 memset(&cp, 0, sizeof(cp));
1422 cp.enable = val;
1423 cp.filter_dup = filter_dup;
1424
1425 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
1426 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1427}
1428
1429static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
1430{
ad383c2c
LAD		 1431 if (!use_ll_privacy(hdev))
1432 return 0;
1433
1434 /* If controller is not/already resolving we are done. */
1435 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
e8907f76
LAD		 1436 return 0;
1437
1438 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
1439 sizeof(val), &val, HCI_CMD_TIMEOUT);
1440}
1441
27592ca1 1442static int hci_scan_disable_sync(struct hci_dev *hdev)
e8907f76
LAD		 1443{
1444 int err;
1445
1446 /* If controller is not scanning we are done. */
1447 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
1448 return 0;
1449
1450 if (hdev->scanning_paused) {
1451 bt_dev_dbg(hdev, "Scanning is paused for suspend");
1452 return 0;
1453 }
1454
e8907f76
LAD		 1455 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
1456 if (err) {
1457 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
1458 return err;
1459 }
1460
e8907f76
LAD		 1461 return err;
1462}
1463
1464static bool scan_use_rpa(struct hci_dev *hdev)
1465{
1466 return hci_dev_test_flag(hdev, HCI_PRIVACY);
1467}
1468
1469static void hci_start_interleave_scan(struct hci_dev *hdev)
1470{
1471 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
1472 queue_delayed_work(hdev->req_workqueue,
1473 &hdev->interleave_scan, 0);
1474}
1475
1476static bool is_interleave_scanning(struct hci_dev *hdev)
1477{
1478 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
1479}
1480
1481static void cancel_interleave_scan(struct hci_dev *hdev)
1482{
1483 bt_dev_dbg(hdev, "cancelling interleave scan");
1484
1485 cancel_delayed_work_sync(&hdev->interleave_scan);
1486
1487 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
1488}
1489
1490/* Return true if interleave_scan wasn't started until exiting this function,
1491 * otherwise, return false
1492 */
1493static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
1494{
1495 /* Do interleaved scan only if all of the following are true:
1496 * - There is at least one ADV monitor
1497 * - At least one pending LE connection or one device to be scanned for
1498 * - Monitor offloading is not supported
1499 * If so, we should alternate between allowlist scan and one without
1500 * any filters to save power.
1501 */
1502 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
1503 !(list_empty(&hdev->pend_le_conns) &&
1504 list_empty(&hdev->pend_le_reports)) &&
1505 hci_get_adv_monitor_offload_ext(hdev) ==
1506 HCI_ADV_MONITOR_EXT_NONE;
1507 bool is_interleaving = is_interleave_scanning(hdev);
1508
1509 if (use_interleaving && !is_interleaving) {
1510 hci_start_interleave_scan(hdev);
1511 bt_dev_dbg(hdev, "starting interleave scan");
1512 return true;
1513 }
1514
1515 if (!use_interleaving && is_interleaving)
1516 cancel_interleave_scan(hdev);
1517
1518 return false;
1519}
1520
1521/* Removes connection to resolve list if needed.*/
1522static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
1523 bdaddr_t *bdaddr, u8 bdaddr_type)
1524{
1525 struct hci_cp_le_del_from_resolv_list cp;
1526 struct bdaddr_list_with_irk *entry;
1527
ad383c2c 1528 if (!use_ll_privacy(hdev))
e8907f76
LAD		 1529 return 0;
1530
1531 /* Check if the IRK has been programmed */
1532 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
1533 bdaddr_type);
1534 if (!entry)
1535 return 0;
1536
1537 cp.bdaddr_type = bdaddr_type;
1538 bacpy(&cp.bdaddr, bdaddr);
1539
1540 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
1541 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1542}
1543
1544static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
1545 bdaddr_t *bdaddr, u8 bdaddr_type)
1546{
1547 struct hci_cp_le_del_from_accept_list cp;
1548 int err;
1549
1550 /* Check if device is on accept list before removing it */
1551 if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
1552 return 0;
1553
1554 cp.bdaddr_type = bdaddr_type;
1555 bacpy(&cp.bdaddr, bdaddr);
1556
ad383c2c
LAD		 1557 /* Ignore errors when removing from resolving list as that is likely
1558 * that the device was never added.
1559 */
1560 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
1561
e8907f76
LAD		 1562 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
1563 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1564 if (err) {
1565 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
1566 return err;
1567 }
1568
1569 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
1570 cp.bdaddr_type);
1571
ad383c2c 1572 return 0;
e8907f76
LAD		 1573}
1574
cf75ad8b
LAD		 1575/* Adds connection to resolve list if needed.
1576 * Setting params to NULL programs local hdev->irk
1577 */
e8907f76
LAD		 1578static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
1579 struct hci_conn_params *params)
1580{
1581 struct hci_cp_le_add_to_resolv_list cp;
1582 struct smp_irk *irk;
1583 struct bdaddr_list_with_irk *entry;
1584
ad383c2c 1585 if (!use_ll_privacy(hdev))
e8907f76
LAD		 1586 return 0;
1587
cf75ad8b
LAD		 1588 /* Attempt to program local identity address, type and irk if params is
1589 * NULL.
1590 */
1591 if (!params) {
1592 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
1593 return 0;
1594
1595 hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
1596 memcpy(cp.peer_irk, hdev->irk, 16);
1597 goto done;
1598 }
1599
e8907f76
LAD		 1600 irk = hci_find_irk_by_addr(hdev, &params->addr, params->addr_type);
1601 if (!irk)
1602 return 0;
1603
1604 /* Check if the IK has _not_ been programmed yet. */
1605 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
1606 &params->addr,
1607 params->addr_type);
1608 if (entry)
1609 return 0;
1610
1611 cp.bdaddr_type = params->addr_type;
1612 bacpy(&cp.bdaddr, &params->addr);
1613 memcpy(cp.peer_irk, irk->val, 16);
1614
cf75ad8b 1615done:
e8907f76
LAD		 1616 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
1617 memcpy(cp.local_irk, hdev->irk, 16);
1618 else
1619 memset(cp.local_irk, 0, 16);
1620
1621 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
1622 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1623}
1624
853b70b5
LAD		 1625/* Set Device Privacy Mode. */
1626static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
1627 struct hci_conn_params *params)
1628{
1629 struct hci_cp_le_set_privacy_mode cp;
1630 struct smp_irk *irk;
1631
1632 /* If device privacy mode has already been set there is nothing to do */
1633 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
1634 return 0;
1635
1636 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
1637 * indicates that LL Privacy has been enabled and
1638 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
1639 */
e1cff700 1640 if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY))
853b70b5
LAD		 1641 return 0;
1642
1643 irk = hci_find_irk_by_addr(hdev, &params->addr, params->addr_type);
1644 if (!irk)
1645 return 0;
1646
1647 memset(&cp, 0, sizeof(cp));
1648 cp.bdaddr_type = irk->addr_type;
1649 bacpy(&cp.bdaddr, &irk->bdaddr);
1650 cp.mode = HCI_DEVICE_PRIVACY;
1651
1652 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
1653 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1654}
1655
e8907f76 1656/* Adds connection to allow list if needed, if the device uses RPA (has IRK)
853b70b5
LAD		 1657 * this attempts to program the device in the resolving list as well and
1658 * properly set the privacy mode.
e8907f76
LAD		 1659 */
1660static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
1661 struct hci_conn_params *params,
ad383c2c 1662 u8 *num_entries)
e8907f76
LAD		 1663{
1664 struct hci_cp_le_add_to_accept_list cp;
1665 int err;
1666
3b420553
LAD		 1667 /* During suspend, only wakeable devices can be in acceptlist */
1668 if (hdev->suspended &&
e1cff700 1669 !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
3b420553
LAD		 1670 return 0;
1671
e8907f76
LAD		 1672 /* Select filter policy to accept all advertising */
1673 if (*num_entries >= hdev->le_accept_list_size)
1674 return -ENOSPC;
1675
1676 /* Accept list can not be used with RPAs */
ad383c2c 1677 if (!use_ll_privacy(hdev) &&
3b420553 1678 hci_find_irk_by_addr(hdev, &params->addr, params->addr_type))
e8907f76 1679 return -EINVAL;
e8907f76 1680
ad383c2c
LAD		 1681 /* Attempt to program the device in the resolving list first to avoid
1682 * having to rollback in case it fails since the resolving list is
1683 * dynamic it can probably be smaller than the accept list.
1684 */
1685 err = hci_le_add_resolve_list_sync(hdev, params);
1686 if (err) {
1687 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
1688 return err;
1689 }
1690
853b70b5
LAD		 1691 /* Set Privacy Mode */
1692 err = hci_le_set_privacy_mode_sync(hdev, params);
1693 if (err) {
1694 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
1695 return err;
1696 }
1697
1698 /* Check if already in accept list */
1699 if (hci_bdaddr_list_lookup(&hdev->le_accept_list, &params->addr,
1700 params->addr_type))
1701 return 0;
1702
e8907f76
LAD		 1703 *num_entries += 1;
1704 cp.bdaddr_type = params->addr_type;
1705 bacpy(&cp.bdaddr, &params->addr);
1706
1707 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
1708 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1709 if (err) {
1710 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
ad383c2c
LAD		 1711 /* Rollback the device from the resolving list */
1712 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
e8907f76
LAD		 1713 return err;
1714 }
1715
1716 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
1717 cp.bdaddr_type);
1718
ad383c2c
LAD		 1719 return 0;
1720}
1721
182ee45d 1722/* This function disables/pause all advertising instances */
ad383c2c
LAD		 1723static int hci_pause_advertising_sync(struct hci_dev *hdev)
1724{
1725 int err;
182ee45d 1726 int old_state;
ad383c2c 1727
9446bdde
LAD		 1728 /* If already been paused there is nothing to do. */
1729 if (hdev->advertising_paused)
ad383c2c
LAD		 1730 return 0;
1731
182ee45d
LAD		 1732 bt_dev_dbg(hdev, "Pausing directed advertising");
1733
1734 /* Stop directed advertising */
1735 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
1736 if (old_state) {
1737 /* When discoverable timeout triggers, then just make sure
1738 * the limited discoverable flag is cleared. Even in the case
1739 * of a timeout triggered from general discoverable, it is
1740 * safe to unconditionally clear the flag.
1741 */
1742 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1743 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1744 hdev->discov_timeout = 0;
1745 }
1746
ad383c2c
LAD		 1747 bt_dev_dbg(hdev, "Pausing advertising instances");
1748
1749 /* Call to disable any advertisements active on the controller.
1750 * This will succeed even if no advertisements are configured.
1751 */
1752 err = hci_disable_advertising_sync(hdev);
1753 if (err)
1754 return err;
1755
1756 /* If we are using software rotation, pause the loop */
1757 if (!ext_adv_capable(hdev))
1758 cancel_adv_timeout(hdev);
1759
1760 hdev->advertising_paused = true;
182ee45d 1761 hdev->advertising_old_state = old_state;
ad383c2c
LAD		 1762
1763 return 0;
e8907f76
LAD		 1764}
1765
182ee45d 1766/* This function enables all user advertising instances */
ad383c2c
LAD		 1767static int hci_resume_advertising_sync(struct hci_dev *hdev)
1768{
1769 struct adv_info *adv, *tmp;
1770 int err;
1771
1772 /* If advertising has not been paused there is nothing to do. */
1773 if (!hdev->advertising_paused)
1774 return 0;
1775
182ee45d
LAD		 1776 /* Resume directed advertising */
1777 hdev->advertising_paused = false;
1778 if (hdev->advertising_old_state) {
1779 hci_dev_set_flag(hdev, HCI_ADVERTISING);
182ee45d
LAD		 1780 hdev->advertising_old_state = 0;
1781 }
1782
ad383c2c
LAD		 1783 bt_dev_dbg(hdev, "Resuming advertising instances");
1784
1785 if (ext_adv_capable(hdev)) {
1786 /* Call for each tracked instance to be re-enabled */
1787 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
1788 err = hci_enable_ext_advertising_sync(hdev,
1789 adv->instance);
1790 if (!err)
1791 continue;
1792
1793 /* If the instance cannot be resumed remove it */
1794 hci_remove_ext_adv_instance_sync(hdev, adv->instance,
1795 NULL);
1796 }
1797 } else {
1798 /* Schedule for most recent instance to be restarted and begin
1799 * the software rotation loop
1800 */
1801 err = hci_schedule_adv_instance_sync(hdev,
1802 hdev->cur_adv_instance,
1803 true);
1804 }
1805
1806 hdev->advertising_paused = false;
1807
1808 return err;
1809}
1810
f892244b
BG		 1811struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
1812 bool extended, struct sock *sk)
1813{
1814 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
1815 HCI_OP_READ_LOCAL_OOB_DATA;
1816
1817 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1818}
1819
ad383c2c
LAD		 1820/* Device must not be scanning when updating the accept list.
1821 *
1822 * Update is done using the following sequence:
1823 *
1824 * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
1825 * Remove Devices From Accept List ->
1826 * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
1827 * Add Devices to Accept List ->
1828 * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
1829 * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
1830 * Enable Scanning
1831 *
1832 * In case of failure advertising shall be restored to its original state and
1833 * return would disable accept list since either accept or resolving list could
1834 * not be programmed.
1835 *
1836 */
e8907f76
LAD		 1837static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
1838{
1839 struct hci_conn_params *params;
1840 struct bdaddr_list *b, *t;
1841 u8 num_entries = 0;
1842 bool pend_conn, pend_report;
80740ebb 1843 u8 filter_policy;
ad383c2c
LAD		 1844 int err;
1845
1846 /* Pause advertising if resolving list can be used as controllers are
1847 * cannot accept resolving list modifications while advertising.
e8907f76 1848 */
ad383c2c
LAD		 1849 if (use_ll_privacy(hdev)) {
1850 err = hci_pause_advertising_sync(hdev);
1851 if (err) {
1852 bt_dev_err(hdev, "pause advertising failed: %d", err);
1853 return 0x00;
1854 }
1855 }
e8907f76 1856
ad383c2c
LAD		 1857 /* Disable address resolution while reprogramming accept list since
1858 * devices that do have an IRK will be programmed in the resolving list
1859 * when LL Privacy is enabled.
1860 */
1861 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
1862 if (err) {
1863 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
1864 goto done;
1865 }
e8907f76
LAD		 1866
1867 /* Go through the current accept list programmed into the
1868 * controller one by one and check if that address is still
1869 * in the list of pending connections or list of devices to
1870 * report. If not present in either list, then remove it from
1871 * the controller.
1872 */
1873 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
1874 pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
1875 &b->bdaddr,
1876 b->bdaddr_type);
1877 pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
1878 &b->bdaddr,
1879 b->bdaddr_type);
1880
1881 /* If the device is not likely to connect or report,
1882 * remove it from the acceptlist.
1883 */
1884 if (!pend_conn && !pend_report) {
1885 hci_le_del_accept_list_sync(hdev, &b->bdaddr,
1886 b->bdaddr_type);
1887 continue;
1888 }
1889
e8907f76
LAD		 1890 num_entries++;
1891 }
1892
1893 /* Since all no longer valid accept list entries have been
1894 * removed, walk through the list of pending connections
1895 * and ensure that any new device gets programmed into
1896 * the controller.
1897 *
1898 * If the list of the devices is larger than the list of
1899 * available accept list entries in the controller, then
1900 * just abort and return filer policy value to not use the
1901 * accept list.
1902 */
1903 list_for_each_entry(params, &hdev->pend_le_conns, action) {
ad383c2c
LAD		 1904 err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
1905 if (err)
1906 goto done;
e8907f76
LAD		 1907 }
1908
1909 /* After adding all new pending connections, walk through
1910 * the list of pending reports and also add these to the
1911 * accept list if there is still space. Abort if space runs out.
1912 */
1913 list_for_each_entry(params, &hdev->pend_le_reports, action) {
ad383c2c
LAD		 1914 err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
1915 if (err)
1916 goto done;
e8907f76
LAD		 1917 }
1918
1919 /* Use the allowlist unless the following conditions are all true:
1920 * - We are not currently suspending
1921 * - There are 1 or more ADV monitors registered and it's not offloaded
1922 * - Interleaved scanning is not currently using the allowlist
1923 */
1924 if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
1925 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
1926 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
ad383c2c
LAD		 1927 err = -EINVAL;
1928
1929done:
80740ebb
LAD		 1930 filter_policy = err ? 0x00 : 0x01;
1931
ad383c2c
LAD		 1932 /* Enable address resolution when LL Privacy is enabled. */
1933 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
1934 if (err)
1935 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
1936
1937 /* Resume advertising if it was paused */
1938 if (use_ll_privacy(hdev))
1939 hci_resume_advertising_sync(hdev);
e8907f76
LAD		 1940
1941 /* Select filter policy to use accept list */
80740ebb 1942 return filter_policy;
e8907f76
LAD		 1943}
1944
1945/* Returns true if an le connection is in the scanning state */
1946static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
1947{
1948 struct hci_conn_hash *h = &hdev->conn_hash;
1949 struct hci_conn *c;
1950
1951 rcu_read_lock();
1952
1953 list_for_each_entry_rcu(c, &h->list, list) {
1954 if (c->type == LE_LINK && c->state == BT_CONNECT &&
1955 test_bit(HCI_CONN_SCANNING, &c->flags)) {
1956 rcu_read_unlock();
1957 return true;
1958 }
1959 }
1960
1961 rcu_read_unlock();
1962
1963 return false;
1964}
1965
1966static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
1967 u16 interval, u16 window,
1968 u8 own_addr_type, u8 filter_policy)
1969{
1970 struct hci_cp_le_set_ext_scan_params *cp;
1971 struct hci_cp_le_scan_phy_params *phy;
1972 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
1973 u8 num_phy = 0;
1974
1975 cp = (void *)data;
1976 phy = (void *)cp->data;
1977
1978 memset(data, 0, sizeof(data));
1979
1980 cp->own_addr_type = own_addr_type;
1981 cp->filter_policy = filter_policy;
1982
1983 if (scan_1m(hdev) || scan_2m(hdev)) {
1984 cp->scanning_phys |= LE_SCAN_PHY_1M;
1985
1986 phy->type = type;
1987 phy->interval = cpu_to_le16(interval);
1988 phy->window = cpu_to_le16(window);
1989
1990 num_phy++;
1991 phy++;
1992 }
1993
1994 if (scan_coded(hdev)) {
1995 cp->scanning_phys |= LE_SCAN_PHY_CODED;
1996
1997 phy->type = type;
1998 phy->interval = cpu_to_le16(interval);
1999 phy->window = cpu_to_le16(window);
2000
2001 num_phy++;
2002 phy++;
2003 }
2004
2005 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
2006 sizeof(*cp) + sizeof(*phy) * num_phy,
2007 data, HCI_CMD_TIMEOUT);
2008}
2009
2010static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
2011 u16 interval, u16 window,
2012 u8 own_addr_type, u8 filter_policy)
2013{
2014 struct hci_cp_le_set_scan_param cp;
2015
2016 if (use_ext_scan(hdev))
2017 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
2018 window, own_addr_type,
2019 filter_policy);
2020
2021 memset(&cp, 0, sizeof(cp));
2022 cp.type = type;
2023 cp.interval = cpu_to_le16(interval);
2024 cp.window = cpu_to_le16(window);
2025 cp.own_address_type = own_addr_type;
2026 cp.filter_policy = filter_policy;
2027
2028 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
2029 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2030}
2031
2032static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
abfeea47
LAD		 2033 u16 window, u8 own_addr_type, u8 filter_policy,
2034 u8 filter_dup)
e8907f76
LAD		 2035{
2036 int err;
2037
2038 if (hdev->scanning_paused) {
2039 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2040 return 0;
2041 }
2042
e8907f76
LAD		 2043 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
2044 own_addr_type, filter_policy);
2045 if (err)
2046 return err;
2047
abfeea47 2048 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
e8907f76
LAD		 2049}
2050
27592ca1 2051static int hci_passive_scan_sync(struct hci_dev *hdev)
e8907f76
LAD		 2052{
2053 u8 own_addr_type;
2054 u8 filter_policy;
2055 u16 window, interval;
ad383c2c 2056 int err;
e8907f76
LAD		 2057
2058 if (hdev->scanning_paused) {
2059 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2060 return 0;
2061 }
2062
ad383c2c
LAD		 2063 err = hci_scan_disable_sync(hdev);
2064 if (err) {
2065 bt_dev_err(hdev, "disable scanning failed: %d", err);
2066 return err;
2067 }
2068
e8907f76
LAD		 2069 /* Set require_privacy to false since no SCAN_REQ are send
2070 * during passive scanning. Not using an non-resolvable address
2071 * here is important so that peer devices using direct
2072 * advertising with our address will be correctly reported
2073 * by the controller.
2074 */
2075 if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
2076 &own_addr_type))
2077 return 0;
2078
2079 if (hdev->enable_advmon_interleave_scan &&
2080 hci_update_interleaved_scan_sync(hdev))
2081 return 0;
2082
2083 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
ad383c2c 2084
e8907f76
LAD		 2085 /* Adding or removing entries from the accept list must
2086 * happen before enabling scanning. The controller does
2087 * not allow accept list modification while scanning.
2088 */
2089 filter_policy = hci_update_accept_list_sync(hdev);
2090
2091 /* When the controller is using random resolvable addresses and
2092 * with that having LE privacy enabled, then controllers with
2093 * Extended Scanner Filter Policies support can now enable support
2094 * for handling directed advertising.
2095 *
2096 * So instead of using filter polices 0x00 (no acceptlist)
2097 * and 0x01 (acceptlist enabled) use the new filter policies
2098 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
2099 */
2100 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
2101 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
2102 filter_policy |= 0x02;
2103
2104 if (hdev->suspended) {
2105 window = hdev->le_scan_window_suspend;
2106 interval = hdev->le_scan_int_suspend;
e8907f76
LAD		 2107 } else if (hci_is_le_conn_scanning(hdev)) {
2108 window = hdev->le_scan_window_connect;
2109 interval = hdev->le_scan_int_connect;
2110 } else if (hci_is_adv_monitoring(hdev)) {
2111 window = hdev->le_scan_window_adv_monitor;
2112 interval = hdev->le_scan_int_adv_monitor;
2113 } else {
2114 window = hdev->le_scan_window;
2115 interval = hdev->le_scan_interval;
2116 }
2117
2118 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
2119
2120 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
abfeea47
LAD		 2121 own_addr_type, filter_policy,
2122 LE_SCAN_FILTER_DUP_ENABLE);
e8907f76
LAD		 2123}
2124
2125/* This function controls the passive scanning based on hdev->pend_le_conns
2126 * list. If there are pending LE connection we start the background scanning,
ad383c2c
LAD		 2127 * otherwise we stop it in the following sequence:
2128 *
2129 * If there are devices to scan:
2130 *
2131 * Disable Scanning -> Update Accept List ->
2132 * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
2133 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
2134 * Enable Scanning
2135 *
2136 * Otherwise:
2137 *
2138 * Disable Scanning
e8907f76
LAD		 2139 */
2140int hci_update_passive_scan_sync(struct hci_dev *hdev)
2141{
2142 int err;
2143
2144 if (!test_bit(HCI_UP, &hdev->flags) ||
2145 test_bit(HCI_INIT, &hdev->flags) ||
2146 hci_dev_test_flag(hdev, HCI_SETUP) ||
2147 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2148 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2149 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2150 return 0;
2151
2152 /* No point in doing scanning if LE support hasn't been enabled */
2153 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2154 return 0;
2155
2156 /* If discovery is active don't interfere with it */
2157 if (hdev->discovery.state != DISCOVERY_STOPPED)
2158 return 0;
2159
2160 /* Reset RSSI and UUID filters when starting background scanning
2161 * since these filters are meant for service discovery only.
2162 *
2163 * The Start Discovery and Start Service Discovery operations
2164 * ensure to set proper values for RSSI threshold and UUID
2165 * filter list. So it is safe to just reset them here.
2166 */
2167 hci_discovery_filter_clear(hdev);
2168
2169 bt_dev_dbg(hdev, "ADV monitoring is %s",
2170 hci_is_adv_monitoring(hdev) ? "on" : "off");
2171
2172 if (list_empty(&hdev->pend_le_conns) &&
2173 list_empty(&hdev->pend_le_reports) &&
2174 !hci_is_adv_monitoring(hdev)) {
2175 /* If there is no pending LE connections or devices
2176 * to be scanned for or no ADV monitors, we should stop the
2177 * background scanning.
2178 */
2179
2180 bt_dev_dbg(hdev, "stopping background scanning");
2181
ad383c2c 2182 err = hci_scan_disable_sync(hdev);
e8907f76
LAD		 2183 if (err)
2184 bt_dev_err(hdev, "stop background scanning failed: %d",
2185 err);
2186 } else {
2187 /* If there is at least one pending LE connection, we should
2188 * keep the background scan running.
2189 */
2190
2191 /* If controller is connecting, we should not start scanning
2192 * since some controllers are not able to scan and connect at
2193 * the same time.
2194 */
2195 if (hci_lookup_le_connect(hdev))
2196 return 0;
2197
e8907f76
LAD		 2198 bt_dev_dbg(hdev, "start background scanning");
2199
2200 err = hci_passive_scan_sync(hdev);
2201 if (err)
2202 bt_dev_err(hdev, "start background scanning failed: %d",
2203 err);
2204 }
2205
2206 return err;
2207}
ad383c2c
LAD		 2208
2209static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
2210{
2211 return hci_update_passive_scan_sync(hdev);
2212}
2213
2214int hci_update_passive_scan(struct hci_dev *hdev)
2215{
5bee2fd6
LAD		 2216 /* Only queue if it would have any effect */
2217 if (!test_bit(HCI_UP, &hdev->flags) ||
2218 test_bit(HCI_INIT, &hdev->flags) ||
2219 hci_dev_test_flag(hdev, HCI_SETUP) ||
2220 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2221 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2222 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2223 return 0;
2224
ad383c2c
LAD		 2225 return hci_cmd_sync_queue(hdev, update_passive_scan_sync, NULL, NULL);
2226}
cf75ad8b 2227
2f2eb0c9 2228int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
cf75ad8b 2229{
2f2eb0c9
BG		 2230 int err;
2231
cf75ad8b
LAD		 2232 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
2233 return 0;
2234
2f2eb0c9 2235 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
cf75ad8b 2236 sizeof(val), &val, HCI_CMD_TIMEOUT);
2f2eb0c9
BG		 2237
2238 if (!err) {
2239 if (val) {
2240 hdev->features[1][0] |= LMP_HOST_SC;
2241 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
2242 } else {
2243 hdev->features[1][0] &= ~LMP_HOST_SC;
2244 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
2245 }
2246 }
2247
2248 return err;
cf75ad8b
LAD		 2249}
2250
3244845c 2251int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
cf75ad8b
LAD		 2252{
2253 int err;
2254
2255 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
2256 lmp_host_ssp_capable(hdev))
2257 return 0;
2258
3244845c
BG		 2259 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
2260 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
2261 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2262 }
2263
cf75ad8b
LAD		 2264 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
2265 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2266 if (err)
2267 return err;
2268
2269 return hci_write_sc_support_sync(hdev, 0x01);
2270}
2271
d81a494c 2272int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
cf75ad8b
LAD		 2273{
2274 struct hci_cp_write_le_host_supported cp;
2275
2276 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
2277 !lmp_bredr_capable(hdev))
2278 return 0;
2279
2280 /* Check first if we already have the right host state
2281 * (host features set)
2282 */
2283 if (le == lmp_host_le_capable(hdev) &&
2284 simul == lmp_host_le_br_capable(hdev))
2285 return 0;
2286
2287 memset(&cp, 0, sizeof(cp));
2288
2289 cp.le = le;
2290 cp.simul = simul;
2291
2292 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
2293 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2294}
2295
2296static int hci_powered_update_adv_sync(struct hci_dev *hdev)
2297{
2298 struct adv_info *adv, *tmp;
2299 int err;
2300
2301 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2302 return 0;
2303
2304 /* If RPA Resolution has not been enable yet it means the
2305 * resolving list is empty and we should attempt to program the
2306 * local IRK in order to support using own_addr_type
2307 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
2308 */
2309 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
2310 hci_le_add_resolve_list_sync(hdev, NULL);
2311 hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2312 }
2313
2314 /* Make sure the controller has a good default for
2315 * advertising data. This also applies to the case
2316 * where BR/EDR was toggled during the AUTO_OFF phase.
2317 */
2318 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
2319 list_empty(&hdev->adv_instances)) {
2320 if (ext_adv_capable(hdev)) {
2321 err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
2322 if (!err)
2323 hci_update_scan_rsp_data_sync(hdev, 0x00);
2324 } else {
2325 err = hci_update_adv_data_sync(hdev, 0x00);
2326 if (!err)
2327 hci_update_scan_rsp_data_sync(hdev, 0x00);
2328 }
2329
2330 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
2331 hci_enable_advertising_sync(hdev);
2332 }
2333
2334 /* Call for each tracked instance to be scheduled */
2335 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
2336 hci_schedule_adv_instance_sync(hdev, adv->instance, true);
2337
2338 return 0;
2339}
2340
2341static int hci_write_auth_enable_sync(struct hci_dev *hdev)
2342{
2343 u8 link_sec;
2344
2345 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
2346 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
2347 return 0;
2348
2349 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
2350 sizeof(link_sec), &link_sec,
2351 HCI_CMD_TIMEOUT);
2352}
2353
353a0249 2354int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
cf75ad8b
LAD		 2355{
2356 struct hci_cp_write_page_scan_activity cp;
2357 u8 type;
2358 int err = 0;
2359
2360 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
2361 return 0;
2362
2363 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
2364 return 0;
2365
2366 memset(&cp, 0, sizeof(cp));
2367
2368 if (enable) {
2369 type = PAGE_SCAN_TYPE_INTERLACED;
2370
2371 /* 160 msec page scan interval */
2372 cp.interval = cpu_to_le16(0x0100);
2373 } else {
2374 type = hdev->def_page_scan_type;
2375 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
2376 }
2377
2378 cp.window = cpu_to_le16(hdev->def_page_scan_window);
2379
2380 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
2381 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
2382 err = __hci_cmd_sync_status(hdev,
2383 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
2384 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2385 if (err)
2386 return err;
2387 }
2388
2389 if (hdev->page_scan_type != type)
2390 err = __hci_cmd_sync_status(hdev,
2391 HCI_OP_WRITE_PAGE_SCAN_TYPE,
2392 sizeof(type), &type,
2393 HCI_CMD_TIMEOUT);
2394
2395 return err;
2396}
2397
2398static bool disconnected_accept_list_entries(struct hci_dev *hdev)
2399{
2400 struct bdaddr_list *b;
2401
2402 list_for_each_entry(b, &hdev->accept_list, list) {
2403 struct hci_conn *conn;
2404
2405 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
2406 if (!conn)
2407 return true;
2408
2409 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2410 return true;
2411 }
2412
2413 return false;
2414}
2415
2416static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
2417{
2418 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
2419 sizeof(val), &val,
2420 HCI_CMD_TIMEOUT);
2421}
2422
451d95a9 2423int hci_update_scan_sync(struct hci_dev *hdev)
cf75ad8b
LAD		 2424{
2425 u8 scan;
2426
2427 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
2428 return 0;
2429
2430 if (!hdev_is_powered(hdev))
2431 return 0;
2432
2433 if (mgmt_powering_down(hdev))
2434 return 0;
2435
2436 if (hdev->scanning_paused)
2437 return 0;
2438
2439 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
2440 disconnected_accept_list_entries(hdev))
2441 scan = SCAN_PAGE;
2442 else
2443 scan = SCAN_DISABLED;
2444
2445 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
2446 scan |= SCAN_INQUIRY;
2447
2448 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
2449 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
2450 return 0;
2451
2452 return hci_write_scan_enable_sync(hdev, scan);
2453}
2454
6f6ff38a 2455int hci_update_name_sync(struct hci_dev *hdev)
cf75ad8b
LAD		 2456{
2457 struct hci_cp_write_local_name cp;
2458
2459 memset(&cp, 0, sizeof(cp));
2460
2461 memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
2462
2463 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
2464 sizeof(cp), &cp,
2465 HCI_CMD_TIMEOUT);
2466}
2467
2468/* This function perform powered update HCI command sequence after the HCI init
2469 * sequence which end up resetting all states, the sequence is as follows:
2470 *
2471 * HCI_SSP_ENABLED(Enable SSP)
2472 * HCI_LE_ENABLED(Enable LE)
2473 * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
2474 * Update adv data)
2475 * Enable Authentication
2476 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
2477 * Set Name -> Set EIR)
2478 */
2479int hci_powered_update_sync(struct hci_dev *hdev)
2480{
2481 int err;
2482
2483 /* Register the available SMP channels (BR/EDR and LE) only when
2484 * successfully powering on the controller. This late
2485 * registration is required so that LE SMP can clearly decide if
2486 * the public address or static address is used.
2487 */
2488 smp_register(hdev);
2489
2490 err = hci_write_ssp_mode_sync(hdev, 0x01);
2491 if (err)
2492 return err;
2493
2494 err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
2495 if (err)
2496 return err;
2497
2498 err = hci_powered_update_adv_sync(hdev);
2499 if (err)
2500 return err;
2501
2502 err = hci_write_auth_enable_sync(hdev);
2503 if (err)
2504 return err;
2505
2506 if (lmp_bredr_capable(hdev)) {
2507 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
2508 hci_write_fast_connectable_sync(hdev, true);
2509 else
2510 hci_write_fast_connectable_sync(hdev, false);
2511 hci_update_scan_sync(hdev);
2512 hci_update_class_sync(hdev);
2513 hci_update_name_sync(hdev);
2514 hci_update_eir_sync(hdev);
2515 }
2516
2517 return 0;
2518}
2519
d0b13706
LAD		 2520/**
2521 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
2522 * (BD_ADDR) for a HCI device from
2523 * a firmware node property.
2524 * @hdev: The HCI device
cf75ad8b 2525 *
d0b13706
LAD		 2526 * Search the firmware node for 'local-bd-address'.
2527 *
2528 * All-zero BD addresses are rejected, because those could be properties
2529 * that exist in the firmware tables, but were not updated by the firmware. For
2530 * example, the DTS could define 'local-bd-address', with zero BD addresses.
cf75ad8b 2531 */
d0b13706 2532static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
cf75ad8b 2533{
d0b13706
LAD		 2534 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
2535 bdaddr_t ba;
2536 int ret;
cf75ad8b 2537
d0b13706
LAD		 2538 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
2539 (u8 *)&ba, sizeof(ba));
2540 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
2541 return;
cf75ad8b 2542
d0b13706
LAD		 2543 bacpy(&hdev->public_addr, &ba);
2544}
cf75ad8b 2545
d0b13706
LAD		 2546struct hci_init_stage {
2547 int (*func)(struct hci_dev *hdev);
2548};
cf75ad8b 2549
d0b13706
LAD		 2550/* Run init stage NULL terminated function table */
2551static int hci_init_stage_sync(struct hci_dev *hdev,
2552 const struct hci_init_stage *stage)
2553{
2554 size_t i;
cf75ad8b 2555
d0b13706
LAD		 2556 for (i = 0; stage[i].func; i++) {
2557 int err;
cf75ad8b 2558
d0b13706
LAD		 2559 err = stage[i].func(hdev);
2560 if (err)
2561 return err;
cf75ad8b
LAD		 2562 }
2563
2564 return 0;
2565}
2566
d0b13706
LAD		 2567/* Read Local Version */
2568static int hci_read_local_version_sync(struct hci_dev *hdev)
cf75ad8b 2569{
d0b13706
LAD		 2570 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
2571 0, NULL, HCI_CMD_TIMEOUT);
2572}
cf75ad8b 2573
d0b13706
LAD		 2574/* Read BD Address */
2575static int hci_read_bd_addr_sync(struct hci_dev *hdev)
2576{
2577 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
2578 0, NULL, HCI_CMD_TIMEOUT);
2579}
cf75ad8b 2580
d0b13706
LAD		 2581#define HCI_INIT(_func) \
2582{ \
2583 .func = _func, \
cf75ad8b
LAD		 2584}
2585
d0b13706
LAD		 2586static const struct hci_init_stage hci_init0[] = {
2587 /* HCI_OP_READ_LOCAL_VERSION */
2588 HCI_INIT(hci_read_local_version_sync),
2589 /* HCI_OP_READ_BD_ADDR */
2590 HCI_INIT(hci_read_bd_addr_sync),
2591 {}
2592};
2593
2594int hci_reset_sync(struct hci_dev *hdev)
cf75ad8b 2595{
cf75ad8b
LAD		 2596 int err;
2597
d0b13706 2598 set_bit(HCI_RESET, &hdev->flags);
cf75ad8b 2599
d0b13706
LAD		 2600 err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
2601 HCI_CMD_TIMEOUT);
2602 if (err)
2603 return err;
cf75ad8b 2604
d0b13706
LAD		 2605 return 0;
2606}
cf75ad8b 2607
d0b13706
LAD		 2608static int hci_init0_sync(struct hci_dev *hdev)
2609{
2610 int err;
cf75ad8b 2611
d0b13706
LAD		 2612 bt_dev_dbg(hdev, "");
2613
2614 /* Reset */
2615 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
2616 err = hci_reset_sync(hdev);
cf75ad8b
LAD		 2617 if (err)
2618 return err;
2619 }
2620
d0b13706
LAD		 2621 return hci_init_stage_sync(hdev, hci_init0);
2622}
abfeea47 2623
d0b13706
LAD		 2624static int hci_unconf_init_sync(struct hci_dev *hdev)
2625{
2626 int err;
2627
2628 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
cf75ad8b
LAD		 2629 return 0;
2630
d0b13706
LAD		 2631 err = hci_init0_sync(hdev);
2632 if (err < 0)
2633 return err;
cf75ad8b 2634
d0b13706
LAD		 2635 if (hci_dev_test_flag(hdev, HCI_SETUP))
2636 hci_debugfs_create_basic(hdev);
cf75ad8b
LAD		 2637
2638 return 0;
2639}
2640
d0b13706
LAD		 2641/* Read Local Supported Features. */
2642static int hci_read_local_features_sync(struct hci_dev *hdev)
cf75ad8b 2643{
d0b13706
LAD		 2644 /* Not all AMP controllers support this command */
2645 if (hdev->dev_type == HCI_AMP && !(hdev->commands[14] & 0x20))
2646 return 0;
cf75ad8b 2647
d0b13706
LAD		 2648 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
2649 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 2650}
2651
d0b13706
LAD		 2652/* BR Controller init stage 1 command sequence */
2653static const struct hci_init_stage br_init1[] = {
2654 /* HCI_OP_READ_LOCAL_FEATURES */
2655 HCI_INIT(hci_read_local_features_sync),
2656 /* HCI_OP_READ_LOCAL_VERSION */
2657 HCI_INIT(hci_read_local_version_sync),
2658 /* HCI_OP_READ_BD_ADDR */
2659 HCI_INIT(hci_read_bd_addr_sync),
2660 {}
2661};
2662
2663/* Read Local Commands */
2664static int hci_read_local_cmds_sync(struct hci_dev *hdev)
cf75ad8b 2665{
d0b13706
LAD		 2666 /* All Bluetooth 1.2 and later controllers should support the
2667 * HCI command for reading the local supported commands.
2668 *
2669 * Unfortunately some controllers indicate Bluetooth 1.2 support,
2670 * but do not have support for this command. If that is the case,
2671 * the driver can quirk the behavior and skip reading the local
2672 * supported commands.
2673 */
2674 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
2675 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
2676 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
2677 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b 2678
d0b13706 2679 return 0;
cf75ad8b
LAD		 2680}
2681
d0b13706
LAD		 2682/* Read Local AMP Info */
2683static int hci_read_local_amp_info_sync(struct hci_dev *hdev)
cf75ad8b 2684{
d0b13706
LAD		 2685 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_AMP_INFO,
2686 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 2687}
2688
d0b13706
LAD		 2689/* Read Data Blk size */
2690static int hci_read_data_block_size_sync(struct hci_dev *hdev)
cf75ad8b 2691{
d0b13706
LAD		 2692 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DATA_BLOCK_SIZE,
2693 0, NULL, HCI_CMD_TIMEOUT);
2694}
cf75ad8b 2695
d0b13706
LAD		 2696/* Read Flow Control Mode */
2697static int hci_read_flow_control_mode_sync(struct hci_dev *hdev)
2698{
2699 return __hci_cmd_sync_status(hdev, HCI_OP_READ_FLOW_CONTROL_MODE,
2700 0, NULL, HCI_CMD_TIMEOUT);
2701}
cf75ad8b 2702
d0b13706
LAD		 2703/* Read Location Data */
2704static int hci_read_location_data_sync(struct hci_dev *hdev)
2705{
2706 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCATION_DATA,
2707 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 2708}
2709
d0b13706
LAD		 2710/* AMP Controller init stage 1 command sequence */
2711static const struct hci_init_stage amp_init1[] = {
2712 /* HCI_OP_READ_LOCAL_VERSION */
2713 HCI_INIT(hci_read_local_version_sync),
2714 /* HCI_OP_READ_LOCAL_COMMANDS */
2715 HCI_INIT(hci_read_local_cmds_sync),
2716 /* HCI_OP_READ_LOCAL_AMP_INFO */
2717 HCI_INIT(hci_read_local_amp_info_sync),
2718 /* HCI_OP_READ_DATA_BLOCK_SIZE */
2719 HCI_INIT(hci_read_data_block_size_sync),
2720 /* HCI_OP_READ_FLOW_CONTROL_MODE */
2721 HCI_INIT(hci_read_flow_control_mode_sync),
2722 /* HCI_OP_READ_LOCATION_DATA */
2723 HCI_INIT(hci_read_location_data_sync),
2724};
2725
2726static int hci_init1_sync(struct hci_dev *hdev)
cf75ad8b 2727{
d0b13706 2728 int err;
cf75ad8b 2729
d0b13706 2730 bt_dev_dbg(hdev, "");
cf75ad8b 2731
d0b13706
LAD		 2732 /* Reset */
2733 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
2734 err = hci_reset_sync(hdev);
2735 if (err)
2736 return err;
2737 }
cf75ad8b 2738
d0b13706
LAD		 2739 switch (hdev->dev_type) {
2740 case HCI_PRIMARY:
2741 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2742 return hci_init_stage_sync(hdev, br_init1);
2743 case HCI_AMP:
2744 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2745 return hci_init_stage_sync(hdev, amp_init1);
2746 default:
2747 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
2748 break;
2749 }
2750
2751 return 0;
cf75ad8b
LAD		 2752}
2753
d0b13706
LAD		 2754/* AMP Controller init stage 2 command sequence */
2755static const struct hci_init_stage amp_init2[] = {
2756 /* HCI_OP_READ_LOCAL_FEATURES */
2757 HCI_INIT(hci_read_local_features_sync),
2758};
2759
2760/* Read Buffer Size (ACL mtu, max pkt, etc.) */
2761static int hci_read_buffer_size_sync(struct hci_dev *hdev)
cf75ad8b 2762{
d0b13706
LAD		 2763 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
2764 0, NULL, HCI_CMD_TIMEOUT);
2765}
cf75ad8b 2766
d0b13706
LAD		 2767/* Read Class of Device */
2768static int hci_read_dev_class_sync(struct hci_dev *hdev)
2769{
2770 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
2771 0, NULL, HCI_CMD_TIMEOUT);
2772}
cf75ad8b 2773
d0b13706
LAD		 2774/* Read Local Name */
2775static int hci_read_local_name_sync(struct hci_dev *hdev)
2776{
2777 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
2778 0, NULL, HCI_CMD_TIMEOUT);
2779}
cf75ad8b 2780
d0b13706
LAD		 2781/* Read Voice Setting */
2782static int hci_read_voice_setting_sync(struct hci_dev *hdev)
2783{
2784 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
2785 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 2786}
2787
d0b13706
LAD		 2788/* Read Number of Supported IAC */
2789static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
cf75ad8b 2790{
d0b13706
LAD		 2791 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
2792 0, NULL, HCI_CMD_TIMEOUT);
2793}
cf75ad8b 2794
d0b13706
LAD		 2795/* Read Current IAC LAP */
2796static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
2797{
2798 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
2799 0, NULL, HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 2800}
2801
d0b13706
LAD		 2802static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
2803 u8 cond_type, bdaddr_t *bdaddr,
2804 u8 auto_accept)
cf75ad8b 2805{
d0b13706 2806 struct hci_cp_set_event_filter cp;
cf75ad8b 2807
d0b13706 2808 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
cf75ad8b
LAD		 2809 return 0;
2810
0eaecfb2
IFM		 2811 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
2812 return 0;
2813
d0b13706
LAD		 2814 memset(&cp, 0, sizeof(cp));
2815 cp.flt_type = flt_type;
cf75ad8b 2816
d0b13706
LAD		 2817 if (flt_type != HCI_FLT_CLEAR_ALL) {
2818 cp.cond_type = cond_type;
2819 bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
2820 cp.addr_conn_flt.auto_accept = auto_accept;
cf75ad8b
LAD		 2821 }
2822
d0b13706
LAD		 2823 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
2824 flt_type == HCI_FLT_CLEAR_ALL ?
2825 sizeof(cp.flt_type) : sizeof(cp), &cp,
2826 HCI_CMD_TIMEOUT);
cf75ad8b
LAD		 2827}
2828
d0b13706 2829static int hci_clear_event_filter_sync(struct hci_dev *hdev)
cf75ad8b 2830{
d0b13706
LAD		 2831 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
2832 return 0;
2833
0eaecfb2
IFM		 2834 /* In theory the state machine should not reach here unless
2835 * a hci_set_event_filter_sync() call succeeds, but we do
2836 * the check both for parity and as a future reminder.
2837 */
2838 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
2839 return 0;
2840
d0b13706
LAD		 2841 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
2842 BDADDR_ANY, 0x00);
2843}
2844
2845/* Connection accept timeout ~20 secs */
2846static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
2847{
2848 __le16 param = cpu_to_le16(0x7d00);
2849
2850 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
2851 sizeof(param), &param, HCI_CMD_TIMEOUT);
2852}
2853
2854/* BR Controller init stage 2 command sequence */
2855static const struct hci_init_stage br_init2[] = {
2856 /* HCI_OP_READ_BUFFER_SIZE */
2857 HCI_INIT(hci_read_buffer_size_sync),
2858 /* HCI_OP_READ_CLASS_OF_DEV */
2859 HCI_INIT(hci_read_dev_class_sync),
2860 /* HCI_OP_READ_LOCAL_NAME */
2861 HCI_INIT(hci_read_local_name_sync),
2862 /* HCI_OP_READ_VOICE_SETTING */
2863 HCI_INIT(hci_read_voice_setting_sync),
2864 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
2865 HCI_INIT(hci_read_num_supported_iac_sync),
2866 /* HCI_OP_READ_CURRENT_IAC_LAP */
2867 HCI_INIT(hci_read_current_iac_lap_sync),
2868 /* HCI_OP_SET_EVENT_FLT */
2869 HCI_INIT(hci_clear_event_filter_sync),
2870 /* HCI_OP_WRITE_CA_TIMEOUT */
2871 HCI_INIT(hci_write_ca_timeout_sync),
2872 {}
2873};
2874
2875static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
2876{
2877 u8 mode = 0x01;
2878
2879 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
2880 return 0;
2881
2882 /* When SSP is available, then the host features page
2883 * should also be available as well. However some
2884 * controllers list the max_page as 0 as long as SSP
2885 * has not been enabled. To achieve proper debugging
2886 * output, force the minimum max_page to 1 at least.
2887 */
2888 hdev->max_page = 0x01;
2889
2890 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
2891 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2892}
2893
2894static int hci_write_eir_sync(struct hci_dev *hdev)
2895{
2896 struct hci_cp_write_eir cp;
2897
2898 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
2899 return 0;
2900
2901 memset(hdev->eir, 0, sizeof(hdev->eir));
2902 memset(&cp, 0, sizeof(cp));
2903
2904 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
2905 HCI_CMD_TIMEOUT);
2906}
2907
2908static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
2909{
2910 u8 mode;
2911
2912 if (!lmp_inq_rssi_capable(hdev) &&
2913 !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
2914 return 0;
2915
2916 /* If Extended Inquiry Result events are supported, then
2917 * they are clearly preferred over Inquiry Result with RSSI
2918 * events.
2919 */
2920 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
2921
2922 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
2923 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2924}
2925
2926static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
2927{
2928 if (!lmp_inq_tx_pwr_capable(hdev))
2929 return 0;
2930
2931 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
2932 0, NULL, HCI_CMD_TIMEOUT);
2933}
2934
2935static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
2936{
2937 struct hci_cp_read_local_ext_features cp;
2938
2939 if (!lmp_ext_feat_capable(hdev))
2940 return 0;
2941
2942 memset(&cp, 0, sizeof(cp));
2943 cp.page = page;
2944
2945 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
2946 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2947}
2948
2949static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
2950{
2951 return hci_read_local_ext_features_sync(hdev, 0x01);
2952}
2953
2954/* HCI Controller init stage 2 command sequence */
2955static const struct hci_init_stage hci_init2[] = {
2956 /* HCI_OP_READ_LOCAL_COMMANDS */
2957 HCI_INIT(hci_read_local_cmds_sync),
2958 /* HCI_OP_WRITE_SSP_MODE */
2959 HCI_INIT(hci_write_ssp_mode_1_sync),
2960 /* HCI_OP_WRITE_EIR */
2961 HCI_INIT(hci_write_eir_sync),
2962 /* HCI_OP_WRITE_INQUIRY_MODE */
2963 HCI_INIT(hci_write_inquiry_mode_sync),
2964 /* HCI_OP_READ_INQ_RSP_TX_POWER */
2965 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
2966 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
2967 HCI_INIT(hci_read_local_ext_features_1_sync),
2968 /* HCI_OP_WRITE_AUTH_ENABLE */
2969 HCI_INIT(hci_write_auth_enable_sync),
2970 {}
2971};
2972
2973/* Read LE Buffer Size */
2974static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
2975{
2976 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
2977 0, NULL, HCI_CMD_TIMEOUT);
2978}
2979
2980/* Read LE Local Supported Features */
2981static int hci_le_read_local_features_sync(struct hci_dev *hdev)
2982{
2983 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
2984 0, NULL, HCI_CMD_TIMEOUT);
2985}
2986
2987/* Read LE Supported States */
2988static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
2989{
2990 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
2991 0, NULL, HCI_CMD_TIMEOUT);
2992}
2993
2994/* LE Controller init stage 2 command sequence */
2995static const struct hci_init_stage le_init2[] = {
2996 /* HCI_OP_LE_READ_BUFFER_SIZE */
2997 HCI_INIT(hci_le_read_buffer_size_sync),
2998 /* HCI_OP_LE_READ_LOCAL_FEATURES */
2999 HCI_INIT(hci_le_read_local_features_sync),
3000 /* HCI_OP_LE_READ_SUPPORTED_STATES */
3001 HCI_INIT(hci_le_read_supported_states_sync),
3002 {}
3003};
3004
3005static int hci_init2_sync(struct hci_dev *hdev)
3006{
3007 int err;
3008
3009 bt_dev_dbg(hdev, "");
3010
3011 if (hdev->dev_type == HCI_AMP)
3012 return hci_init_stage_sync(hdev, amp_init2);
3013
3014 if (lmp_bredr_capable(hdev)) {
3015 err = hci_init_stage_sync(hdev, br_init2);
3016 if (err)
3017 return err;
3018 } else {
3019 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
3020 }
3021
3022 if (lmp_le_capable(hdev)) {
3023 err = hci_init_stage_sync(hdev, le_init2);
3024 if (err)
3025 return err;
3026 /* LE-only controllers have LE implicitly enabled */
3027 if (!lmp_bredr_capable(hdev))
3028 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
3029 }
3030
3031 return hci_init_stage_sync(hdev, hci_init2);
3032}
3033
3034static int hci_set_event_mask_sync(struct hci_dev *hdev)
3035{
3036 /* The second byte is 0xff instead of 0x9f (two reserved bits
3037 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
3038 * command otherwise.
3039 */
3040 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
3041
3042 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
3043 * any event mask for pre 1.2 devices.
3044 */
3045 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3046 return 0;
3047
3048 if (lmp_bredr_capable(hdev)) {
3049 events[4] |= 0x01; /* Flow Specification Complete */
182ee45d
LAD		 3050
3051 /* Don't set Disconnect Complete when suspended as that
3052 * would wakeup the host when disconnecting due to
3053 * suspend.
3054 */
3055 if (hdev->suspended)
3056 events[0] &= 0xef;
d0b13706
LAD		 3057 } else {
3058 /* Use a different default for LE-only devices */
3059 memset(events, 0, sizeof(events));
3060 events[1] |= 0x20; /* Command Complete */
3061 events[1] |= 0x40; /* Command Status */
3062 events[1] |= 0x80; /* Hardware Error */
3063
3064 /* If the controller supports the Disconnect command, enable
3065 * the corresponding event. In addition enable packet flow
3066 * control related events.
3067 */
3068 if (hdev->commands[0] & 0x20) {
182ee45d
LAD		 3069 /* Don't set Disconnect Complete when suspended as that
3070 * would wakeup the host when disconnecting due to
3071 * suspend.
3072 */
3073 if (!hdev->suspended)
3074 events[0] |= 0x10; /* Disconnection Complete */
d0b13706
LAD		 3075 events[2] |= 0x04; /* Number of Completed Packets */
3076 events[3] |= 0x02; /* Data Buffer Overflow */
3077 }
3078
3079 /* If the controller supports the Read Remote Version
3080 * Information command, enable the corresponding event.
3081 */
3082 if (hdev->commands[2] & 0x80)
3083 events[1] |= 0x08; /* Read Remote Version Information
3084 * Complete
3085 */
3086
3087 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
3088 events[0] |= 0x80; /* Encryption Change */
3089 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3090 }
3091 }
3092
3093 if (lmp_inq_rssi_capable(hdev) ||
3094 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3095 events[4] |= 0x02; /* Inquiry Result with RSSI */
3096
3097 if (lmp_ext_feat_capable(hdev))
3098 events[4] |= 0x04; /* Read Remote Extended Features Complete */
3099
3100 if (lmp_esco_capable(hdev)) {
3101 events[5] |= 0x08; /* Synchronous Connection Complete */
3102 events[5] |= 0x10; /* Synchronous Connection Changed */
3103 }
3104
3105 if (lmp_sniffsubr_capable(hdev))
3106 events[5] |= 0x20; /* Sniff Subrating */
3107
3108 if (lmp_pause_enc_capable(hdev))
3109 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3110
3111 if (lmp_ext_inq_capable(hdev))
3112 events[5] |= 0x40; /* Extended Inquiry Result */
3113
3114 if (lmp_no_flush_capable(hdev))
3115 events[7] |= 0x01; /* Enhanced Flush Complete */
3116
3117 if (lmp_lsto_capable(hdev))
3118 events[6] |= 0x80; /* Link Supervision Timeout Changed */
3119
3120 if (lmp_ssp_capable(hdev)) {
3121 events[6] |= 0x01; /* IO Capability Request */
3122 events[6] |= 0x02; /* IO Capability Response */
3123 events[6] |= 0x04; /* User Confirmation Request */
3124 events[6] |= 0x08; /* User Passkey Request */
3125 events[6] |= 0x10; /* Remote OOB Data Request */
3126 events[6] |= 0x20; /* Simple Pairing Complete */
3127 events[7] |= 0x04; /* User Passkey Notification */
3128 events[7] |= 0x08; /* Keypress Notification */
3129 events[7] |= 0x10; /* Remote Host Supported
3130 * Features Notification
3131 */
3132 }
3133
3134 if (lmp_le_capable(hdev))
3135 events[7] |= 0x20; /* LE Meta-Event */
3136
3137 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
3138 sizeof(events), events, HCI_CMD_TIMEOUT);
3139}
3140
3141static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
3142{
3143 struct hci_cp_read_stored_link_key cp;
3144
3145 if (!(hdev->commands[6] & 0x20) ||
3146 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
3147 return 0;
3148
3149 memset(&cp, 0, sizeof(cp));
3150 bacpy(&cp.bdaddr, BDADDR_ANY);
3151 cp.read_all = 0x01;
3152
3153 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
3154 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3155}
3156
3157static int hci_setup_link_policy_sync(struct hci_dev *hdev)
3158{
3159 struct hci_cp_write_def_link_policy cp;
3160 u16 link_policy = 0;
3161
3162 if (!(hdev->commands[5] & 0x10))
3163 return 0;
3164
3165 memset(&cp, 0, sizeof(cp));
3166
3167 if (lmp_rswitch_capable(hdev))
3168 link_policy |= HCI_LP_RSWITCH;
3169 if (lmp_hold_capable(hdev))
3170 link_policy |= HCI_LP_HOLD;
3171 if (lmp_sniff_capable(hdev))
3172 link_policy |= HCI_LP_SNIFF;
3173 if (lmp_park_capable(hdev))
3174 link_policy |= HCI_LP_PARK;
3175
3176 cp.policy = cpu_to_le16(link_policy);
3177
3178 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
3179 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3180}
3181
3182static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
3183{
3184 if (!(hdev->commands[8] & 0x01))
3185 return 0;
3186
3187 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
3188 0, NULL, HCI_CMD_TIMEOUT);
3189}
3190
3191static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
3192{
3193 if (!(hdev->commands[18] & 0x04) ||
3194 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
3195 return 0;
3196
3197 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
3198 0, NULL, HCI_CMD_TIMEOUT);
3199}
3200
3201static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
3202{
3203 /* Some older Broadcom based Bluetooth 1.2 controllers do not
3204 * support the Read Page Scan Type command. Check support for
3205 * this command in the bit mask of supported commands.
3206 */
3207 if (!(hdev->commands[13] & 0x01))
3208 return 0;
3209
3210 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
3211 0, NULL, HCI_CMD_TIMEOUT);
3212}
3213
3214/* Read features beyond page 1 if available */
3215static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
3216{
3217 u8 page;
3218 int err;
3219
3220 if (!lmp_ext_feat_capable(hdev))
3221 return 0;
3222
3223 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
3224 page++) {
3225 err = hci_read_local_ext_features_sync(hdev, page);
3226 if (err)
3227 return err;
3228 }
3229
3230 return 0;
3231}
3232
3233/* HCI Controller init stage 3 command sequence */
3234static const struct hci_init_stage hci_init3[] = {
3235 /* HCI_OP_SET_EVENT_MASK */
3236 HCI_INIT(hci_set_event_mask_sync),
3237 /* HCI_OP_READ_STORED_LINK_KEY */
3238 HCI_INIT(hci_read_stored_link_key_sync),
3239 /* HCI_OP_WRITE_DEF_LINK_POLICY */
3240 HCI_INIT(hci_setup_link_policy_sync),
3241 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
3242 HCI_INIT(hci_read_page_scan_activity_sync),
3243 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
3244 HCI_INIT(hci_read_def_err_data_reporting_sync),
3245 /* HCI_OP_READ_PAGE_SCAN_TYPE */
3246 HCI_INIT(hci_read_page_scan_type_sync),
3247 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3248 HCI_INIT(hci_read_local_ext_features_all_sync),
3249 {}
3250};
3251
3252static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
3253{
3254 u8 events[8];
3255
3256 if (!lmp_le_capable(hdev))
3257 return 0;
3258
3259 memset(events, 0, sizeof(events));
3260
3261 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
3262 events[0] |= 0x10; /* LE Long Term Key Request */
3263
3264 /* If controller supports the Connection Parameters Request
3265 * Link Layer Procedure, enable the corresponding event.
3266 */
3267 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
3268 /* LE Remote Connection Parameter Request */
3269 events[0] |= 0x20;
3270
3271 /* If the controller supports the Data Length Extension
3272 * feature, enable the corresponding event.
3273 */
3274 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
3275 events[0] |= 0x40; /* LE Data Length Change */
3276
a56a1138
LAD		 3277 /* If the controller supports LL Privacy feature or LE Extended Adv,
3278 * enable the corresponding event.
d0b13706 3279 */
a56a1138 3280 if (use_enhanced_conn_complete(hdev))
d0b13706
LAD		 3281 events[1] |= 0x02; /* LE Enhanced Connection Complete */
3282
3283 /* If the controller supports Extended Scanner Filter
3284 * Policies, enable the corresponding event.
3285 */
3286 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
3287 events[1] |= 0x04; /* LE Direct Advertising Report */
3288
3289 /* If the controller supports Channel Selection Algorithm #2
3290 * feature, enable the corresponding event.
3291 */
3292 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
3293 events[2] |= 0x08; /* LE Channel Selection Algorithm */
3294
3295 /* If the controller supports the LE Set Scan Enable command,
3296 * enable the corresponding advertising report event.
3297 */
3298 if (hdev->commands[26] & 0x08)
3299 events[0] |= 0x02; /* LE Advertising Report */
3300
3301 /* If the controller supports the LE Create Connection
3302 * command, enable the corresponding event.
3303 */
3304 if (hdev->commands[26] & 0x10)
3305 events[0] |= 0x01; /* LE Connection Complete */
3306
3307 /* If the controller supports the LE Connection Update
3308 * command, enable the corresponding event.
3309 */
3310 if (hdev->commands[27] & 0x04)
3311 events[0] |= 0x04; /* LE Connection Update Complete */
3312
3313 /* If the controller supports the LE Read Remote Used Features
3314 * command, enable the corresponding event.
3315 */
3316 if (hdev->commands[27] & 0x20)
3317 /* LE Read Remote Used Features Complete */
3318 events[0] |= 0x08;
3319
3320 /* If the controller supports the LE Read Local P-256
3321 * Public Key command, enable the corresponding event.
3322 */
3323 if (hdev->commands[34] & 0x02)
3324 /* LE Read Local P-256 Public Key Complete */
3325 events[0] |= 0x80;
3326
3327 /* If the controller supports the LE Generate DHKey
3328 * command, enable the corresponding event.
3329 */
3330 if (hdev->commands[34] & 0x04)
3331 events[1] |= 0x01; /* LE Generate DHKey Complete */
3332
3333 /* If the controller supports the LE Set Default PHY or
3334 * LE Set PHY commands, enable the corresponding event.
3335 */
3336 if (hdev->commands[35] & (0x20 | 0x40))
3337 events[1] |= 0x08; /* LE PHY Update Complete */
3338
3339 /* If the controller supports LE Set Extended Scan Parameters
3340 * and LE Set Extended Scan Enable commands, enable the
3341 * corresponding event.
3342 */
3343 if (use_ext_scan(hdev))
3344 events[1] |= 0x10; /* LE Extended Advertising Report */
3345
3346 /* If the controller supports the LE Extended Advertising
3347 * command, enable the corresponding event.
3348 */
3349 if (ext_adv_capable(hdev))
3350 events[2] |= 0x02; /* LE Advertising Set Terminated */
3351
3352 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
3353 sizeof(events), events, HCI_CMD_TIMEOUT);
3354}
3355
3356/* Read LE Advertising Channel TX Power */
3357static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
3358{
3359 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
3360 /* HCI TS spec forbids mixing of legacy and extended
3361 * advertising commands wherein READ_ADV_TX_POWER is
3362 * also included. So do not call it if extended adv
3363 * is supported otherwise controller will return
3364 * COMMAND_DISALLOWED for extended commands.
3365 */
3366 return __hci_cmd_sync_status(hdev,
3367 HCI_OP_LE_READ_ADV_TX_POWER,
3368 0, NULL, HCI_CMD_TIMEOUT);
3369 }
3370
3371 return 0;
3372}
3373
3374/* Read LE Min/Max Tx Power*/
3375static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
3376{
d2f8114f
AG		 3377 if (!(hdev->commands[38] & 0x80) ||
3378 test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
d0b13706
LAD		 3379 return 0;
3380
3381 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
3382 0, NULL, HCI_CMD_TIMEOUT);
3383}
3384
3385/* Read LE Accept List Size */
3386static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
3387{
3388 if (!(hdev->commands[26] & 0x40))
3389 return 0;
3390
3391 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
3392 0, NULL, HCI_CMD_TIMEOUT);
3393}
3394
3395/* Clear LE Accept List */
3396static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
3397{
3398 if (!(hdev->commands[26] & 0x80))
3399 return 0;
3400
3401 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
3402 HCI_CMD_TIMEOUT);
3403}
3404
3405/* Read LE Resolving List Size */
3406static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
3407{
3408 if (!(hdev->commands[34] & 0x40))
3409 return 0;
3410
3411 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
3412 0, NULL, HCI_CMD_TIMEOUT);
3413}
3414
3415/* Clear LE Resolving List */
3416static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
3417{
3418 if (!(hdev->commands[34] & 0x20))
3419 return 0;
3420
3421 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
3422 HCI_CMD_TIMEOUT);
3423}
3424
3425/* Set RPA timeout */
3426static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
3427{
3428 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
3429
3430 if (!(hdev->commands[35] & 0x04))
3431 return 0;
3432
3433 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
3434 sizeof(timeout), &timeout,
3435 HCI_CMD_TIMEOUT);
3436}
3437
3438/* Read LE Maximum Data Length */
3439static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
3440{
3441 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
3442 return 0;
3443
3444 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
3445 HCI_CMD_TIMEOUT);
3446}
3447
3448/* Read LE Suggested Default Data Length */
3449static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
3450{
3451 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
3452 return 0;
3453
3454 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
3455 HCI_CMD_TIMEOUT);
3456}
3457
3458/* Read LE Number of Supported Advertising Sets */
3459static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
3460{
3461 if (!ext_adv_capable(hdev))
3462 return 0;
3463
3464 return __hci_cmd_sync_status(hdev,
3465 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
3466 0, NULL, HCI_CMD_TIMEOUT);
3467}
3468
3469/* Write LE Host Supported */
3470static int hci_set_le_support_sync(struct hci_dev *hdev)
3471{
3472 struct hci_cp_write_le_host_supported cp;
3473
3474 /* LE-only devices do not support explicit enablement */
3475 if (!lmp_bredr_capable(hdev))
3476 return 0;
3477
3478 memset(&cp, 0, sizeof(cp));
3479
3480 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
3481 cp.le = 0x01;
3482 cp.simul = 0x00;
3483 }
3484
3485 if (cp.le == lmp_host_le_capable(hdev))
3486 return 0;
3487
3488 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
3489 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3490}
3491
3492/* LE Controller init stage 3 command sequence */
3493static const struct hci_init_stage le_init3[] = {
3494 /* HCI_OP_LE_SET_EVENT_MASK */
3495 HCI_INIT(hci_le_set_event_mask_sync),
3496 /* HCI_OP_LE_READ_ADV_TX_POWER */
3497 HCI_INIT(hci_le_read_adv_tx_power_sync),
3498 /* HCI_OP_LE_READ_TRANSMIT_POWER */
3499 HCI_INIT(hci_le_read_tx_power_sync),
3500 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
3501 HCI_INIT(hci_le_read_accept_list_size_sync),
3502 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
3503 HCI_INIT(hci_le_clear_accept_list_sync),
3504 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
3505 HCI_INIT(hci_le_read_resolv_list_size_sync),
3506 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
3507 HCI_INIT(hci_le_clear_resolv_list_sync),
3508 /* HCI_OP_LE_SET_RPA_TIMEOUT */
3509 HCI_INIT(hci_le_set_rpa_timeout_sync),
3510 /* HCI_OP_LE_READ_MAX_DATA_LEN */
3511 HCI_INIT(hci_le_read_max_data_len_sync),
3512 /* HCI_OP_LE_READ_DEF_DATA_LEN */
3513 HCI_INIT(hci_le_read_def_data_len_sync),
3514 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
3515 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
3516 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
3517 HCI_INIT(hci_set_le_support_sync),
3518 {}
3519};
3520
3521static int hci_init3_sync(struct hci_dev *hdev)
3522{
3523 int err;
3524
3525 bt_dev_dbg(hdev, "");
3526
3527 err = hci_init_stage_sync(hdev, hci_init3);
3528 if (err)
3529 return err;
3530
3531 if (lmp_le_capable(hdev))
3532 return hci_init_stage_sync(hdev, le_init3);
3533
3534 return 0;
3535}
3536
3537static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
3538{
3539 struct hci_cp_delete_stored_link_key cp;
3540
3541 /* Some Broadcom based Bluetooth controllers do not support the
3542 * Delete Stored Link Key command. They are clearly indicating its
3543 * absence in the bit mask of supported commands.
3544 *
3545 * Check the supported commands and only if the command is marked
3546 * as supported send it. If not supported assume that the controller
3547 * does not have actual support for stored link keys which makes this
3548 * command redundant anyway.
3549 *
3550 * Some controllers indicate that they support handling deleting
3551 * stored link keys, but they don't. The quirk lets a driver
3552 * just disable this command.
3553 */
3554 if (!(hdev->commands[6] & 0x80) ||
3555 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
3556 return 0;
3557
3558 memset(&cp, 0, sizeof(cp));
3559 bacpy(&cp.bdaddr, BDADDR_ANY);
3560 cp.delete_all = 0x01;
3561
3562 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
3563 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3564}
3565
3566static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
3567{
3568 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
3569 bool changed = false;
3570
3571 /* Set event mask page 2 if the HCI command for it is supported */
3572 if (!(hdev->commands[22] & 0x04))
3573 return 0;
3574
3575 /* If Connectionless Peripheral Broadcast central role is supported
3576 * enable all necessary events for it.
3577 */
3578 if (lmp_cpb_central_capable(hdev)) {
3579 events[1] |= 0x40; /* Triggered Clock Capture */
3580 events[1] |= 0x80; /* Synchronization Train Complete */
3581 events[2] |= 0x10; /* Peripheral Page Response Timeout */
3582 events[2] |= 0x20; /* CPB Channel Map Change */
3583 changed = true;
3584 }
3585
3586 /* If Connectionless Peripheral Broadcast peripheral role is supported
3587 * enable all necessary events for it.
3588 */
3589 if (lmp_cpb_peripheral_capable(hdev)) {
3590 events[2] |= 0x01; /* Synchronization Train Received */
3591 events[2] |= 0x02; /* CPB Receive */
3592 events[2] |= 0x04; /* CPB Timeout */
3593 events[2] |= 0x08; /* Truncated Page Complete */
3594 changed = true;
3595 }
3596
3597 /* Enable Authenticated Payload Timeout Expired event if supported */
3598 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
3599 events[2] |= 0x80;
3600 changed = true;
3601 }
3602
3603 /* Some Broadcom based controllers indicate support for Set Event
3604 * Mask Page 2 command, but then actually do not support it. Since
3605 * the default value is all bits set to zero, the command is only
3606 * required if the event mask has to be changed. In case no change
3607 * to the event mask is needed, skip this command.
3608 */
3609 if (!changed)
3610 return 0;
3611
3612 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
3613 sizeof(events), events, HCI_CMD_TIMEOUT);
3614}
3615
3616/* Read local codec list if the HCI command is supported */
3617static int hci_read_local_codecs_sync(struct hci_dev *hdev)
3618{
3619 if (!(hdev->commands[29] & 0x20))
3620 return 0;
3621
3622 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_CODECS, 0, NULL,
3623 HCI_CMD_TIMEOUT);
3624}
3625
3626/* Read local pairing options if the HCI command is supported */
3627static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
3628{
3629 if (!(hdev->commands[41] & 0x08))
3630 return 0;
3631
3632 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
3633 0, NULL, HCI_CMD_TIMEOUT);
3634}
3635
3636/* Get MWS transport configuration if the HCI command is supported */
3637static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
3638{
3639 if (!(hdev->commands[30] & 0x08))
3640 return 0;
3641
3642 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
3643 0, NULL, HCI_CMD_TIMEOUT);
3644}
3645
3646/* Check for Synchronization Train support */
3647static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
3648{
3649 if (!lmp_sync_train_capable(hdev))
3650 return 0;
3651
3652 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
3653 0, NULL, HCI_CMD_TIMEOUT);
3654}
3655
3656/* Enable Secure Connections if supported and configured */
3657static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
3658{
3659 u8 support = 0x01;
3660
3661 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
3662 !bredr_sc_enabled(hdev))
3663 return 0;
3664
3665 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
3666 sizeof(support), &support,
3667 HCI_CMD_TIMEOUT);
3668}
3669
3670/* Set erroneous data reporting if supported to the wideband speech
3671 * setting value
3672 */
3673static int hci_set_err_data_report_sync(struct hci_dev *hdev)
3674{
3675 struct hci_cp_write_def_err_data_reporting cp;
3676 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
3677
3678 if (!(hdev->commands[18] & 0x08) ||
3679 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
3680 return 0;
3681
3682 if (enabled == hdev->err_data_reporting)
3683 return 0;
3684
3685 memset(&cp, 0, sizeof(cp));
3686 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
3687 ERR_DATA_REPORTING_DISABLED;
3688
3689 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
3690 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3691}
3692
3693static const struct hci_init_stage hci_init4[] = {
3694 /* HCI_OP_DELETE_STORED_LINK_KEY */
3695 HCI_INIT(hci_delete_stored_link_key_sync),
3696 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
3697 HCI_INIT(hci_set_event_mask_page_2_sync),
3698 /* HCI_OP_READ_LOCAL_CODECS */
3699 HCI_INIT(hci_read_local_codecs_sync),
3700 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
3701 HCI_INIT(hci_read_local_pairing_opts_sync),
3702 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
3703 HCI_INIT(hci_get_mws_transport_config_sync),
3704 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
3705 HCI_INIT(hci_read_sync_train_params_sync),
3706 /* HCI_OP_WRITE_SC_SUPPORT */
3707 HCI_INIT(hci_write_sc_support_1_sync),
3708 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
3709 HCI_INIT(hci_set_err_data_report_sync),
3710 {}
3711};
3712
3713/* Set Suggested Default Data Length to maximum if supported */
3714static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
3715{
3716 struct hci_cp_le_write_def_data_len cp;
3717
3718 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
3719 return 0;
3720
3721 memset(&cp, 0, sizeof(cp));
3722 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
3723 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
3724
3725 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
3726 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3727}
3728
3729/* Set Default PHY parameters if command is supported */
3730static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
3731{
3732 struct hci_cp_le_set_default_phy cp;
3733
3734 if (!(hdev->commands[35] & 0x20))
3735 return 0;
3736
3737 memset(&cp, 0, sizeof(cp));
3738 cp.all_phys = 0x00;
3739 cp.tx_phys = hdev->le_tx_def_phys;
3740 cp.rx_phys = hdev->le_rx_def_phys;
3741
3742 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
3743 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3744}
3745
3746static const struct hci_init_stage le_init4[] = {
3747 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
3748 HCI_INIT(hci_le_set_write_def_data_len_sync),
3749 /* HCI_OP_LE_SET_DEFAULT_PHY */
3750 HCI_INIT(hci_le_set_default_phy_sync),
3751 {}
3752};
3753
3754static int hci_init4_sync(struct hci_dev *hdev)
3755{
3756 int err;
3757
3758 bt_dev_dbg(hdev, "");
3759
3760 err = hci_init_stage_sync(hdev, hci_init4);
3761 if (err)
3762 return err;
3763
3764 if (lmp_le_capable(hdev))
3765 return hci_init_stage_sync(hdev, le_init4);
3766
3767 return 0;
3768}
3769
3770static int hci_init_sync(struct hci_dev *hdev)
3771{
3772 int err;
3773
3774 err = hci_init1_sync(hdev);
3775 if (err < 0)
3776 return err;
3777
3778 if (hci_dev_test_flag(hdev, HCI_SETUP))
3779 hci_debugfs_create_basic(hdev);
3780
3781 err = hci_init2_sync(hdev);
3782 if (err < 0)
3783 return err;
3784
3785 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
3786 * BR/EDR/LE type controllers. AMP controllers only need the
3787 * first two stages of init.
3788 */
3789 if (hdev->dev_type != HCI_PRIMARY)
3790 return 0;
3791
3792 err = hci_init3_sync(hdev);
3793 if (err < 0)
3794 return err;
3795
3796 err = hci_init4_sync(hdev);
3797 if (err < 0)
3798 return err;
3799
3800 /* This function is only called when the controller is actually in
3801 * configured state. When the controller is marked as unconfigured,
3802 * this initialization procedure is not run.
3803 *
3804 * It means that it is possible that a controller runs through its
3805 * setup phase and then discovers missing settings. If that is the
3806 * case, then this function will not be called. It then will only
3807 * be called during the config phase.
3808 *
3809 * So only when in setup phase or config phase, create the debugfs
3810 * entries and register the SMP channels.
3811 */
3812 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
3813 !hci_dev_test_flag(hdev, HCI_CONFIG))
3814 return 0;
3815
3816 hci_debugfs_create_common(hdev);
3817
3818 if (lmp_bredr_capable(hdev))
3819 hci_debugfs_create_bredr(hdev);
3820
3821 if (lmp_le_capable(hdev))
3822 hci_debugfs_create_le(hdev);
3823
3824 return 0;
3825}
3826
6b5c1cda
LAD		 3827#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc }
3828
3829static const struct {
3830 unsigned long quirk;
3831 const char *desc;
3832} hci_broken_table[] = {
3833 HCI_QUIRK_BROKEN(LOCAL_COMMANDS,
3834 "HCI Read Local Supported Commands not supported"),
3835 HCI_QUIRK_BROKEN(STORED_LINK_KEY,
3836 "HCI Delete Stored Link Key command is advertised, "
3837 "but not supported."),
3838 HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
3839 "HCI Read Default Erroneous Data Reporting command is "
3840 "advertised, but not supported."),
3841 HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
3842 "HCI Read Transmit Power Level command is advertised, "
3843 "but not supported."),
3844 HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL,
3845 "HCI Set Event Filter command not supported."),
3846 HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN,
3847 "HCI Enhanced Setup Synchronous Connection command is "
3848 "advertised, but not supported.")
3849};
3850
d0b13706
LAD		 3851int hci_dev_open_sync(struct hci_dev *hdev)
3852{
3853 int ret = 0;
3854
3855 bt_dev_dbg(hdev, "");
3856
3857 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
3858 ret = -ENODEV;
3859 goto done;
3860 }
3861
3862 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
3863 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3864 /* Check for rfkill but allow the HCI setup stage to
3865 * proceed (which in itself doesn't cause any RF activity).
3866 */
3867 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
3868 ret = -ERFKILL;
3869 goto done;
3870 }
3871
3872 /* Check for valid public address or a configured static
3873 * random address, but let the HCI setup proceed to
3874 * be able to determine if there is a public address
3875 * or not.
3876 *
3877 * In case of user channel usage, it is not important
3878 * if a public address or static random address is
3879 * available.
3880 *
3881 * This check is only valid for BR/EDR controllers
3882 * since AMP controllers do not have an address.
3883 */
3884 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
3885 hdev->dev_type == HCI_PRIMARY &&
3886 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3887 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
3888 ret = -EADDRNOTAVAIL;
3889 goto done;
3890 }
3891 }
3892
3893 if (test_bit(HCI_UP, &hdev->flags)) {
3894 ret = -EALREADY;
3895 goto done;
3896 }
3897
3898 if (hdev->open(hdev)) {
3899 ret = -EIO;
3900 goto done;
3901 }
3902
3903 set_bit(HCI_RUNNING, &hdev->flags);
3904 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
3905
3906 atomic_set(&hdev->cmd_cnt, 1);
3907 set_bit(HCI_INIT, &hdev->flags);
3908
3909 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
3910 test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
3911 bool invalid_bdaddr;
6b5c1cda 3912 size_t i;
d0b13706
LAD		 3913
3914 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
3915
3916 if (hdev->setup)
3917 ret = hdev->setup(hdev);
3918
6b5c1cda
LAD		 3919 for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) {
3920 if (test_bit(hci_broken_table[i].quirk, &hdev->quirks))
3921 bt_dev_warn(hdev, "%s",
3922 hci_broken_table[i].desc);
3923 }
3924
d0b13706
LAD		 3925 /* The transport driver can set the quirk to mark the
3926 * BD_ADDR invalid before creating the HCI device or in
3927 * its setup callback.
3928 */
3929 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR,
3930 &hdev->quirks);
3931
3932 if (ret)
3933 goto setup_failed;
3934
3935 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
3936 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
3937 hci_dev_get_bd_addr_from_property(hdev);
3938
3939 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
3940 hdev->set_bdaddr) {
3941 ret = hdev->set_bdaddr(hdev,
3942 &hdev->public_addr);
3943
3944 /* If setting of the BD_ADDR from the device
3945 * property succeeds, then treat the address
3946 * as valid even if the invalid BD_ADDR
3947 * quirk indicates otherwise.
3948 */
3949 if (!ret)
3950 invalid_bdaddr = false;
3951 }
3952 }
3953
3954setup_failed:
3955 /* The transport driver can set these quirks before
3956 * creating the HCI device or in its setup callback.
3957 *
3958 * For the invalid BD_ADDR quirk it is possible that
3959 * it becomes a valid address if the bootloader does
3960 * provide it (see above).
3961 *
3962 * In case any of them is set, the controller has to
3963 * start up as unconfigured.
3964 */
3965 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
3966 invalid_bdaddr)
3967 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3968
3969 /* For an unconfigured controller it is required to
3970 * read at least the version information provided by
3971 * the Read Local Version Information command.
3972 *
3973 * If the set_bdaddr driver callback is provided, then
3974 * also the original Bluetooth public device address
3975 * will be read using the Read BD Address command.
3976 */
3977 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
3978 ret = hci_unconf_init_sync(hdev);
3979 }
3980
3981 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
3982 /* If public address change is configured, ensure that
3983 * the address gets programmed. If the driver does not
3984 * support changing the public address, fail the power
3985 * on procedure.
3986 */
3987 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
3988 hdev->set_bdaddr)
3989 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
3990 else
3991 ret = -EADDRNOTAVAIL;
3992 }
3993
3994 if (!ret) {
3995 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
3996 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3997 ret = hci_init_sync(hdev);
3998 if (!ret && hdev->post_init)
3999 ret = hdev->post_init(hdev);
4000 }
4001 }
4002
4003 /* If the HCI Reset command is clearing all diagnostic settings,
4004 * then they need to be reprogrammed after the init procedure
4005 * completed.
4006 */
4007 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
4008 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4009 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
4010 ret = hdev->set_diag(hdev, true);
4011
385315de
JM		 4012 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4013 msft_do_open(hdev);
4014 aosp_do_open(hdev);
4015 }
d0b13706
LAD		 4016
4017 clear_bit(HCI_INIT, &hdev->flags);
4018
4019 if (!ret) {
4020 hci_dev_hold(hdev);
4021 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
4022 hci_adv_instances_set_rpa_expired(hdev, true);
4023 set_bit(HCI_UP, &hdev->flags);
4024 hci_sock_dev_event(hdev, HCI_DEV_UP);
4025 hci_leds_update_powered(hdev, true);
4026 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
4027 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
4028 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
4029 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4030 hci_dev_test_flag(hdev, HCI_MGMT) &&
4031 hdev->dev_type == HCI_PRIMARY) {
4032 ret = hci_powered_update_sync(hdev);
4033 }
4034 } else {
4035 /* Init failed, cleanup */
4036 flush_work(&hdev->tx_work);
4037
4038 /* Since hci_rx_work() is possible to awake new cmd_work
4039 * it should be flushed first to avoid unexpected call of
4040 * hci_cmd_work()
4041 */
4042 flush_work(&hdev->rx_work);
4043 flush_work(&hdev->cmd_work);
4044
4045 skb_queue_purge(&hdev->cmd_q);
4046 skb_queue_purge(&hdev->rx_q);
4047
4048 if (hdev->flush)
4049 hdev->flush(hdev);
4050
4051 if (hdev->sent_cmd) {
4052 kfree_skb(hdev->sent_cmd);
4053 hdev->sent_cmd = NULL;
4054 }
4055
4056 clear_bit(HCI_RUNNING, &hdev->flags);
4057 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4058
4059 hdev->close(hdev);
4060 hdev->flags &= BIT(HCI_RAW);
4061 }
4062
4063done:
4064 return ret;
4065}
4066
4067/* This function requires the caller holds hdev->lock */
4068static void hci_pend_le_actions_clear(struct hci_dev *hdev)
4069{
4070 struct hci_conn_params *p;
4071
4072 list_for_each_entry(p, &hdev->le_conn_params, list) {
4073 if (p->conn) {
4074 hci_conn_drop(p->conn);
4075 hci_conn_put(p->conn);
4076 p->conn = NULL;
4077 }
4078 list_del_init(&p->action);
4079 }
4080
4081 BT_DBG("All LE pending actions cleared");
4082}
4083
4084int hci_dev_close_sync(struct hci_dev *hdev)
4085{
4086 bool auto_off;
4087 int err = 0;
4088
4089 bt_dev_dbg(hdev, "");
4090
4091 cancel_delayed_work(&hdev->power_off);
4092 cancel_delayed_work(&hdev->ncmd_timer);
4093
4094 hci_request_cancel_all(hdev);
4095
4096 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
4097 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4098 test_bit(HCI_UP, &hdev->flags)) {
4099 /* Execute vendor specific shutdown routine */
4100 if (hdev->shutdown)
4101 err = hdev->shutdown(hdev);
4102 }
4103
4104 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
4105 cancel_delayed_work_sync(&hdev->cmd_timer);
4106 return err;
4107 }
4108
4109 hci_leds_update_powered(hdev, false);
4110
4111 /* Flush RX and TX works */
4112 flush_work(&hdev->tx_work);
4113 flush_work(&hdev->rx_work);
4114
4115 if (hdev->discov_timeout > 0) {
4116 hdev->discov_timeout = 0;
4117 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
4118 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
4119 }
4120
4121 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
4122 cancel_delayed_work(&hdev->service_cache);
4123
4124 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4125 struct adv_info *adv_instance;
4126
4127 cancel_delayed_work_sync(&hdev->rpa_expired);
4128
4129 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
4130 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
4131 }
4132
4133 /* Avoid potential lockdep warnings from the *_flush() calls by
4134 * ensuring the workqueue is empty up front.
4135 */
4136 drain_workqueue(hdev->workqueue);
4137
4138 hci_dev_lock(hdev);
4139
4140 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
4141
4142 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
4143
4144 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
4145 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4146 hci_dev_test_flag(hdev, HCI_MGMT))
4147 __mgmt_power_off(hdev);
4148
4149 hci_inquiry_cache_flush(hdev);
4150 hci_pend_le_actions_clear(hdev);
4151 hci_conn_hash_flush(hdev);
fa78d2d1 4152 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
d0b13706 4153 smp_unregister(hdev);
fa78d2d1 4154 hci_dev_unlock(hdev);
d0b13706
LAD		 4155
4156 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
4157
385315de
JM		 4158 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4159 aosp_do_close(hdev);
4160 msft_do_close(hdev);
4161 }
d0b13706
LAD		 4162
4163 if (hdev->flush)
4164 hdev->flush(hdev);
4165
4166 /* Reset device */
4167 skb_queue_purge(&hdev->cmd_q);
4168 atomic_set(&hdev->cmd_cnt, 1);
4169 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
4170 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4171 set_bit(HCI_INIT, &hdev->flags);
4172 hci_reset_sync(hdev);
4173 clear_bit(HCI_INIT, &hdev->flags);
4174 }
4175
4176 /* flush cmd work */
4177 flush_work(&hdev->cmd_work);
4178
4179 /* Drop queues */
4180 skb_queue_purge(&hdev->rx_q);
4181 skb_queue_purge(&hdev->cmd_q);
4182 skb_queue_purge(&hdev->raw_q);
4183
4184 /* Drop last sent command */
4185 if (hdev->sent_cmd) {
4186 cancel_delayed_work_sync(&hdev->cmd_timer);
4187 kfree_skb(hdev->sent_cmd);
4188 hdev->sent_cmd = NULL;
4189 }
4190
4191 clear_bit(HCI_RUNNING, &hdev->flags);
4192 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4193
d0b13706
LAD		 4194 /* After this point our queues are empty and no tasks are scheduled. */
4195 hdev->close(hdev);
4196
4197 /* Clear flags */
4198 hdev->flags &= BIT(HCI_RAW);
4199 hci_dev_clear_volatile_flags(hdev);
4200
4201 /* Controller radio is available but is currently powered down */
4202 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
4203
4204 memset(hdev->eir, 0, sizeof(hdev->eir));
4205 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
4206 bacpy(&hdev->random_addr, BDADDR_ANY);
4207
4208 hci_dev_put(hdev);
4209 return err;
4210}
4211
4212/* This function perform power on HCI command sequence as follows:
4213 *
4214 * If controller is already up (HCI_UP) performs hci_powered_update_sync
4215 * sequence otherwise run hci_dev_open_sync which will follow with
4216 * hci_powered_update_sync after the init sequence is completed.
4217 */
4218static int hci_power_on_sync(struct hci_dev *hdev)
4219{
4220 int err;
4221
4222 if (test_bit(HCI_UP, &hdev->flags) &&
4223 hci_dev_test_flag(hdev, HCI_MGMT) &&
4224 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
4225 cancel_delayed_work(&hdev->power_off);
4226 return hci_powered_update_sync(hdev);
4227 }
4228
4229 err = hci_dev_open_sync(hdev);
4230 if (err < 0)
4231 return err;
4232
4233 /* During the HCI setup phase, a few error conditions are
4234 * ignored and they need to be checked now. If they are still
4235 * valid, it is important to return the device back off.
4236 */
4237 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
4238 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
4239 (hdev->dev_type == HCI_PRIMARY &&
4240 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
4241 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
4242 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
4243 hci_dev_close_sync(hdev);
4244 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
4245 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
4246 HCI_AUTO_OFF_TIMEOUT);
4247 }
4248
4249 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
4250 /* For unconfigured devices, set the HCI_RAW flag
4251 * so that userspace can easily identify them.
4252 */
4253 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4254 set_bit(HCI_RAW, &hdev->flags);
4255
4256 /* For fully configured devices, this will send
4257 * the Index Added event. For unconfigured devices,
4258 * it will send Unconfigued Index Added event.
4259 *
4260 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
4261 * and no event will be send.
4262 */
4263 mgmt_index_added(hdev);
4264 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
4265 /* When the controller is now configured, then it
4266 * is important to clear the HCI_RAW flag.
4267 */
4268 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4269 clear_bit(HCI_RAW, &hdev->flags);
4270
4271 /* Powering on the controller with HCI_CONFIG set only
4272 * happens with the transition from unconfigured to
4273 * configured. This will send the Index Added event.
4274 */
4275 mgmt_index_added(hdev);
4276 }
4277
4278 return 0;
4279}
4280
4281static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
4282{
4283 struct hci_cp_remote_name_req_cancel cp;
4284
4285 memset(&cp, 0, sizeof(cp));
4286 bacpy(&cp.bdaddr, addr);
4287
4288 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
4289 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4290}
4291
4292int hci_stop_discovery_sync(struct hci_dev *hdev)
4293{
4294 struct discovery_state *d = &hdev->discovery;
4295 struct inquiry_entry *e;
4296 int err;
4297
4298 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
4299
4300 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
4301 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
4302 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
4303 0, NULL, HCI_CMD_TIMEOUT);
4304 if (err)
4305 return err;
4306 }
4307
4308 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
4309 cancel_delayed_work(&hdev->le_scan_disable);
4310 cancel_delayed_work(&hdev->le_scan_restart);
4311
4312 err = hci_scan_disable_sync(hdev);
4313 if (err)
4314 return err;
4315 }
4316
4317 } else {
4318 err = hci_scan_disable_sync(hdev);
4319 if (err)
4320 return err;
4321 }
4322
4323 /* Resume advertising if it was paused */
4324 if (use_ll_privacy(hdev))
4325 hci_resume_advertising_sync(hdev);
4326
4327 /* No further actions needed for LE-only discovery */
4328 if (d->type == DISCOV_TYPE_LE)
4329 return 0;
4330
4331 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
4332 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
4333 NAME_PENDING);
4334 if (!e)
4335 return 0;
4336
4337 return hci_remote_name_cancel_sync(hdev, &e->data.bdaddr);
4338 }
4339
4340 return 0;
4341}
4342
4343static int hci_disconnect_phy_link_sync(struct hci_dev *hdev, u16 handle,
4344 u8 reason)
4345{
4346 struct hci_cp_disconn_phy_link cp;
4347
4348 memset(&cp, 0, sizeof(cp));
4349 cp.phy_handle = HCI_PHY_HANDLE(handle);
4350 cp.reason = reason;
4351
4352 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONN_PHY_LINK,
4353 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4354}
4355
4356static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
4357 u8 reason)
4358{
4359 struct hci_cp_disconnect cp;
4360
4361 if (conn->type == AMP_LINK)
4362 return hci_disconnect_phy_link_sync(hdev, conn->handle, reason);
4363
4364 memset(&cp, 0, sizeof(cp));
4365 cp.handle = cpu_to_le16(conn->handle);
4366 cp.reason = reason;
4367
4368 /* Wait for HCI_EV_DISCONN_COMPLETE not HCI_EV_CMD_STATUS when not
4369 * suspending.
4370 */
4371 if (!hdev->suspended)
4372 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
4373 sizeof(cp), &cp,
4374 HCI_EV_DISCONN_COMPLETE,
4375 HCI_CMD_TIMEOUT, NULL);
4376
4377 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
4378 HCI_CMD_TIMEOUT);
4379}
4380
4381static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
4382 struct hci_conn *conn)
4383{
4384 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
4385 return 0;
4386
4387 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
4388 6, &conn->dst, HCI_CMD_TIMEOUT);
4389}
4390
4391static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn)
4392{
4393 if (conn->type == LE_LINK)
4394 return hci_le_connect_cancel_sync(hdev, conn);
4395
4396 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
4397 return 0;
4398
4399 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
4400 6, &conn->dst, HCI_CMD_TIMEOUT);
4401}
4402
4403static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
4404 u8 reason)
4405{
4406 struct hci_cp_reject_sync_conn_req cp;
4407
4408 memset(&cp, 0, sizeof(cp));
4409 bacpy(&cp.bdaddr, &conn->dst);
4410 cp.reason = reason;
4411
4412 /* SCO rejection has its own limited set of
4413 * allowed error values (0x0D-0x0F).
4414 */
4415 if (reason < 0x0d || reason > 0x0f)
4416 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
4417
4418 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
4419 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4420}
4421
4422static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
4423 u8 reason)
4424{
4425 struct hci_cp_reject_conn_req cp;
4426
4427 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
4428 return hci_reject_sco_sync(hdev, conn, reason);
4429
4430 memset(&cp, 0, sizeof(cp));
4431 bacpy(&cp.bdaddr, &conn->dst);
4432 cp.reason = reason;
4433
4434 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
4435 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4436}
4437
4438static int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
4439 u8 reason)
4440{
9b3628d7
LAD		 4441 int err;
4442
d0b13706
LAD		 4443 switch (conn->state) {
4444 case BT_CONNECTED:
4445 case BT_CONFIG:
4446 return hci_disconnect_sync(hdev, conn, reason);
4447 case BT_CONNECT:
9b3628d7
LAD		 4448 err = hci_connect_cancel_sync(hdev, conn);
4449 /* Cleanup hci_conn object if it cannot be cancelled as it
4450 * likelly means the controller and host stack are out of sync.
4451 */
4452 if (err)
4453 hci_conn_failed(conn, err);
4454
4455 return err;
d0b13706
LAD		 4456 case BT_CONNECT2:
4457 return hci_reject_conn_sync(hdev, conn, reason);
4458 default:
4459 conn->state = BT_CLOSED;
4460 break;
4461 }
4462
4463 return 0;
4464}
4465
182ee45d
LAD		 4466static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
4467{
4468 struct hci_conn *conn, *tmp;
4469 int err;
4470
4471 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
4472 err = hci_abort_conn_sync(hdev, conn, reason);
4473 if (err)
4474 return err;
4475 }
4476
8cd3c55c 4477 return 0;
182ee45d
LAD		 4478}
4479
d0b13706
LAD		 4480/* This function perform power off HCI command sequence as follows:
4481 *
4482 * Clear Advertising
4483 * Stop Discovery
4484 * Disconnect all connections
4485 * hci_dev_close_sync
4486 */
4487static int hci_power_off_sync(struct hci_dev *hdev)
4488{
d0b13706
LAD		 4489 int err;
4490
4491 /* If controller is already down there is nothing to do */
4492 if (!test_bit(HCI_UP, &hdev->flags))
4493 return 0;
4494
4495 if (test_bit(HCI_ISCAN, &hdev->flags) ||
4496 test_bit(HCI_PSCAN, &hdev->flags)) {
4497 err = hci_write_scan_enable_sync(hdev, 0x00);
4498 if (err)
4499 return err;
4500 }
4501
4502 err = hci_clear_adv_sync(hdev, NULL, false);
4503 if (err)
4504 return err;
4505
4506 err = hci_stop_discovery_sync(hdev);
4507 if (err)
4508 return err;
4509
182ee45d
LAD		 4510 /* Terminated due to Power Off */
4511 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
4512 if (err)
4513 return err;
d0b13706
LAD		 4514
4515 return hci_dev_close_sync(hdev);
4516}
4517
4518int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
4519{
4520 if (val)
4521 return hci_power_on_sync(hdev);
cf75ad8b
LAD		 4522
4523 return hci_power_off_sync(hdev);
4524}
abfeea47 4525
2bd1b237
LAD		 4526static int hci_write_iac_sync(struct hci_dev *hdev)
4527{
4528 struct hci_cp_write_current_iac_lap cp;
4529
4530 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
4531 return 0;
4532
4533 memset(&cp, 0, sizeof(cp));
4534
4535 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
4536 /* Limited discoverable mode */
4537 cp.num_iac = min_t(u8, hdev->num_iac, 2);
4538 cp.iac_lap[0] = 0x00; /* LIAC */
4539 cp.iac_lap[1] = 0x8b;
4540 cp.iac_lap[2] = 0x9e;
4541 cp.iac_lap[3] = 0x33; /* GIAC */
4542 cp.iac_lap[4] = 0x8b;
4543 cp.iac_lap[5] = 0x9e;
4544 } else {
4545 /* General discoverable mode */
4546 cp.num_iac = 1;
4547 cp.iac_lap[0] = 0x33; /* GIAC */
4548 cp.iac_lap[1] = 0x8b;
4549 cp.iac_lap[2] = 0x9e;
4550 }
4551
4552 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
4553 (cp.num_iac * 3) + 1, &cp,
4554 HCI_CMD_TIMEOUT);
4555}
4556
4557int hci_update_discoverable_sync(struct hci_dev *hdev)
4558{
4559 int err = 0;
4560
4561 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
4562 err = hci_write_iac_sync(hdev);
4563 if (err)
4564 return err;
4565
4566 err = hci_update_scan_sync(hdev);
4567 if (err)
4568 return err;
4569
4570 err = hci_update_class_sync(hdev);
4571 if (err)
4572 return err;
4573 }
4574
4575 /* Advertising instances don't use the global discoverable setting, so
4576 * only update AD if advertising was enabled using Set Advertising.
4577 */
4578 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
4579 err = hci_update_adv_data_sync(hdev, 0x00);
4580 if (err)
4581 return err;
4582
4583 /* Discoverable mode affects the local advertising
4584 * address in limited privacy mode.
4585 */
4586 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
4587 if (ext_adv_capable(hdev))
4588 err = hci_start_ext_adv_sync(hdev, 0x00);
4589 else
4590 err = hci_enable_advertising_sync(hdev);
4591 }
4592 }
4593
4594 return err;
4595}
4596
4597static int update_discoverable_sync(struct hci_dev *hdev, void *data)
4598{
4599 return hci_update_discoverable_sync(hdev);
4600}
4601
4602int hci_update_discoverable(struct hci_dev *hdev)
4603{
4604 /* Only queue if it would have any effect */
4605 if (hdev_is_powered(hdev) &&
4606 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
4607 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
4608 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
4609 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
4610 NULL);
4611
4612 return 0;
4613}
4614
f056a657
LAD		 4615int hci_update_connectable_sync(struct hci_dev *hdev)
4616{
4617 int err;
4618
4619 err = hci_update_scan_sync(hdev);
4620 if (err)
4621 return err;
4622
4623 /* If BR/EDR is not enabled and we disable advertising as a
4624 * by-product of disabling connectable, we need to update the
4625 * advertising flags.
4626 */
4627 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
4628 err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
4629
4630 /* Update the advertising parameters if necessary */
4631 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
4632 !list_empty(&hdev->adv_instances)) {
4633 if (ext_adv_capable(hdev))
4634 err = hci_start_ext_adv_sync(hdev,
4635 hdev->cur_adv_instance);
4636 else
4637 err = hci_enable_advertising_sync(hdev);
4638
4639 if (err)
4640 return err;
4641 }
4642
4643 return hci_update_passive_scan_sync(hdev);
4644}
4645
abfeea47
LAD		 4646static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
4647{
4648 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
4649 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
4650 struct hci_cp_inquiry cp;
4651
4652 bt_dev_dbg(hdev, "");
4653
4654 if (hci_dev_test_flag(hdev, HCI_INQUIRY))
4655 return 0;
4656
4657 hci_dev_lock(hdev);
4658 hci_inquiry_cache_flush(hdev);
4659 hci_dev_unlock(hdev);
4660
4661 memset(&cp, 0, sizeof(cp));
4662
4663 if (hdev->discovery.limited)
4664 memcpy(&cp.lap, liac, sizeof(cp.lap));
4665 else
4666 memcpy(&cp.lap, giac, sizeof(cp.lap));
4667
4668 cp.length = length;
4669
4670 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
4671 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4672}
4673
4674static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
4675{
4676 u8 own_addr_type;
4677 /* Accept list is not used for discovery */
4678 u8 filter_policy = 0x00;
4679 /* Default is to enable duplicates filter */
4680 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
4681 int err;
4682
4683 bt_dev_dbg(hdev, "");
4684
4685 /* If controller is scanning, it means the passive scanning is
4686 * running. Thus, we should temporarily stop it in order to set the
4687 * discovery scanning parameters.
4688 */
4689 err = hci_scan_disable_sync(hdev);
4690 if (err) {
4691 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
4692 return err;
4693 }
4694
4695 cancel_interleave_scan(hdev);
4696
4697 /* Pause advertising since active scanning disables address resolution
4698 * which advertising depend on in order to generate its RPAs.
4699 */
4700 if (use_ll_privacy(hdev)) {
4701 err = hci_pause_advertising_sync(hdev);
4702 if (err) {
4703 bt_dev_err(hdev, "pause advertising failed: %d", err);
4704 goto failed;
4705 }
4706 }
4707
4708 /* Disable address resolution while doing active scanning since the
4709 * accept list shall not be used and all reports shall reach the host
4710 * anyway.
4711 */
4712 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
4713 if (err) {
4714 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
4715 err);
4716 goto failed;
4717 }
4718
4719 /* All active scans will be done with either a resolvable private
4720 * address (when privacy feature has been enabled) or non-resolvable
4721 * private address.
4722 */
4723 err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
4724 &own_addr_type);
4725 if (err < 0)
4726 own_addr_type = ADDR_LE_DEV_PUBLIC;
4727
4728 if (hci_is_adv_monitoring(hdev)) {
4729 /* Duplicate filter should be disabled when some advertisement
4730 * monitor is activated, otherwise AdvMon can only receive one
4731 * advertisement for one peer(*) during active scanning, and
4732 * might report loss to these peers.
4733 *
4734 * Note that different controllers have different meanings of
4735 * |duplicate|. Some of them consider packets with the same
4736 * address as duplicate, and others consider packets with the
4737 * same address and the same RSSI as duplicate. Although in the
4738 * latter case we don't need to disable duplicate filter, but
4739 * it is common to have active scanning for a short period of
4740 * time, the power impact should be neglectable.
4741 */
4742 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
4743 }
4744
4745 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
4746 hdev->le_scan_window_discovery,
4747 own_addr_type, filter_policy, filter_dup);
4748 if (!err)
4749 return err;
4750
4751failed:
4752 /* Resume advertising if it was paused */
4753 if (use_ll_privacy(hdev))
4754 hci_resume_advertising_sync(hdev);
4755
4756 /* Resume passive scanning */
4757 hci_update_passive_scan_sync(hdev);
4758 return err;
4759}
4760
4761static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
4762{
4763 int err;
4764
4765 bt_dev_dbg(hdev, "");
4766
4767 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
4768 if (err)
4769 return err;
4770
4771 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
4772}
4773
4774int hci_start_discovery_sync(struct hci_dev *hdev)
4775{
4776 unsigned long timeout;
4777 int err;
4778
4779 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
4780
4781 switch (hdev->discovery.type) {
4782 case DISCOV_TYPE_BREDR:
4783 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
4784 case DISCOV_TYPE_INTERLEAVED:
4785 /* When running simultaneous discovery, the LE scanning time
4786 * should occupy the whole discovery time sine BR/EDR inquiry
4787 * and LE scanning are scheduled by the controller.
4788 *
4789 * For interleaving discovery in comparison, BR/EDR inquiry
4790 * and LE scanning are done sequentially with separate
4791 * timeouts.
4792 */
4793 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
4794 &hdev->quirks)) {
4795 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
4796 /* During simultaneous discovery, we double LE scan
4797 * interval. We must leave some time for the controller
4798 * to do BR/EDR inquiry.
4799 */
4800 err = hci_start_interleaved_discovery_sync(hdev);
4801 break;
4802 }
4803
4804 timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
4805 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
4806 break;
4807 case DISCOV_TYPE_LE:
4808 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
4809 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
4810 break;
4811 default:
4812 return -EINVAL;
4813 }
4814
4815 if (err)
4816 return err;
4817
4818 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
4819
4820 /* When service discovery is used and the controller has a
4821 * strict duplicate filter, it is important to remember the
4822 * start and duration of the scan. This is required for
4823 * restarting scanning during the discovery phase.
4824 */
4825 if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
4826 hdev->discovery.result_filtering) {
4827 hdev->discovery.scan_start = jiffies;
4828 hdev->discovery.scan_duration = timeout;
4829 }
4830
4831 queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
4832 timeout);
abfeea47
LAD		 4833 return 0;
4834}
182ee45d
LAD		 4835
4836static void hci_suspend_monitor_sync(struct hci_dev *hdev)
4837{
4838 switch (hci_get_adv_monitor_offload_ext(hdev)) {
4839 case HCI_ADV_MONITOR_EXT_MSFT:
4840 msft_suspend_sync(hdev);
4841 break;
4842 default:
4843 return;
4844 }
4845}
4846
4847/* This function disables discovery and mark it as paused */
4848static int hci_pause_discovery_sync(struct hci_dev *hdev)
4849{
4850 int old_state = hdev->discovery.state;
4851 int err;
4852
4853 /* If discovery already stopped/stopping/paused there nothing to do */
4854 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
4855 hdev->discovery_paused)
4856 return 0;
4857
4858 hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
4859 err = hci_stop_discovery_sync(hdev);
4860 if (err)
4861 return err;
4862
4863 hdev->discovery_paused = true;
4864 hdev->discovery_old_state = old_state;
4865 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
4866
4867 return 0;
4868}
4869
4870static int hci_update_event_filter_sync(struct hci_dev *hdev)
4871{
4872 struct bdaddr_list_with_flags *b;
4873 u8 scan = SCAN_DISABLED;
4874 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
4875 int err;
4876
4877 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
4878 return 0;
4879
0eaecfb2
IFM		 4880 /* Some fake CSR controllers lock up after setting this type of
4881 * filter, so avoid sending the request altogether.
4882 */
4883 if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
4884 return 0;
4885
182ee45d
LAD		 4886 /* Always clear event filter when starting */
4887 hci_clear_event_filter_sync(hdev);
4888
4889 list_for_each_entry(b, &hdev->accept_list, list) {
e1cff700 4890 if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
182ee45d
LAD		 4891 continue;
4892
4893 bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
4894
4895 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
4896 HCI_CONN_SETUP_ALLOW_BDADDR,
4897 &b->bdaddr,
4898 HCI_CONN_SETUP_AUTO_ON);
4899 if (err)
4900 bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
4901 &b->bdaddr);
4902 else
4903 scan = SCAN_PAGE;
4904 }
4905
4906 if (scan && !scanning)
4907 hci_write_scan_enable_sync(hdev, scan);
4908 else if (!scan && scanning)
4909 hci_write_scan_enable_sync(hdev, scan);
4910
4911 return 0;
4912}
4913
3b420553
LAD		 4914/* This function disables scan (BR and LE) and mark it as paused */
4915static int hci_pause_scan_sync(struct hci_dev *hdev)
4916{
4917 if (hdev->scanning_paused)
4918 return 0;
4919
4920 /* Disable page scan if enabled */
4921 if (test_bit(HCI_PSCAN, &hdev->flags))
4922 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
4923
4924 hci_scan_disable_sync(hdev);
4925
4926 hdev->scanning_paused = true;
4927
4928 return 0;
4929}
4930
182ee45d
LAD		 4931/* This function performs the HCI suspend procedures in the follow order:
4932 *
4933 * Pause discovery (active scanning/inquiry)
4934 * Pause Directed Advertising/Advertising
3b420553 4935 * Pause Scanning (passive scanning in case discovery was not active)
182ee45d
LAD		 4936 * Disconnect all connections
4937 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
4938 * otherwise:
4939 * Update event mask (only set events that are allowed to wake up the host)
4940 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
4941 * Update passive scanning (lower duty cycle)
4942 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
4943 */
4944int hci_suspend_sync(struct hci_dev *hdev)
4945{
4946 int err;
4947
4948 /* If marked as suspended there nothing to do */
4949 if (hdev->suspended)
4950 return 0;
4951
4952 /* Mark device as suspended */
4953 hdev->suspended = true;
4954
4955 /* Pause discovery if not already stopped */
4956 hci_pause_discovery_sync(hdev);
4957
4958 /* Pause other advertisements */
4959 hci_pause_advertising_sync(hdev);
4960
182ee45d
LAD		 4961 /* Suspend monitor filters */
4962 hci_suspend_monitor_sync(hdev);
4963
4964 /* Prevent disconnects from causing scanning to be re-enabled */
3b420553 4965 hci_pause_scan_sync(hdev);
182ee45d
LAD		 4966
4967 /* Soft disconnect everything (power off) */
4968 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
4969 if (err) {
4970 /* Set state to BT_RUNNING so resume doesn't notify */
4971 hdev->suspend_state = BT_RUNNING;
4972 hci_resume_sync(hdev);
4973 return err;
4974 }
4975
4976 /* Only configure accept list if disconnect succeeded and wake
4977 * isn't being prevented.
4978 */
4979 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
4980 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
4981 return 0;
4982 }
4983
4984 /* Unpause to take care of updating scanning params */
4985 hdev->scanning_paused = false;
4986
4987 /* Update event mask so only the allowed event can wakeup the host */
4988 hci_set_event_mask_sync(hdev);
4989
4990 /* Enable event filter for paired devices */
4991 hci_update_event_filter_sync(hdev);
4992
4993 /* Update LE passive scan if enabled */
4994 hci_update_passive_scan_sync(hdev);
4995
4996 /* Pause scan changes again. */
4997 hdev->scanning_paused = true;
4998
4999 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
5000
5001 return 0;
5002}
5003
5004/* This function resumes discovery */
5005static int hci_resume_discovery_sync(struct hci_dev *hdev)
5006{
5007 int err;
5008
5009 /* If discovery not paused there nothing to do */
5010 if (!hdev->discovery_paused)
5011 return 0;
5012
5013 hdev->discovery_paused = false;
5014
5015 hci_discovery_set_state(hdev, DISCOVERY_STARTING);
5016
5017 err = hci_start_discovery_sync(hdev);
5018
5019 hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
5020 DISCOVERY_FINDING);
5021
5022 return err;
5023}
5024
5025static void hci_resume_monitor_sync(struct hci_dev *hdev)
5026{
5027 switch (hci_get_adv_monitor_offload_ext(hdev)) {
5028 case HCI_ADV_MONITOR_EXT_MSFT:
5029 msft_resume_sync(hdev);
5030 break;
5031 default:
5032 return;
5033 }
5034}
5035
3b420553
LAD		 5036/* This function resume scan and reset paused flag */
5037static int hci_resume_scan_sync(struct hci_dev *hdev)
5038{
5039 if (!hdev->scanning_paused)
5040 return 0;
5041
5042 hci_update_scan_sync(hdev);
5043
5044 /* Reset passive scanning to normal */
5045 hci_update_passive_scan_sync(hdev);
5046
5047 hdev->scanning_paused = false;
5048
5049 return 0;
5050}
5051
182ee45d
LAD		 5052/* This function performs the HCI suspend procedures in the follow order:
5053 *
5054 * Restore event mask
5055 * Clear event filter
5056 * Update passive scanning (normal duty cycle)
5057 * Resume Directed Advertising/Advertising
5058 * Resume discovery (active scanning/inquiry)
5059 */
5060int hci_resume_sync(struct hci_dev *hdev)
5061{
5062 /* If not marked as suspended there nothing to do */
5063 if (!hdev->suspended)
5064 return 0;
5065
5066 hdev->suspended = false;
5067 hdev->scanning_paused = false;
5068
5069 /* Restore event mask */
5070 hci_set_event_mask_sync(hdev);
5071
5072 /* Clear any event filters and restore scan state */
5073 hci_clear_event_filter_sync(hdev);
182ee45d 5074
3b420553
LAD		 5075 /* Resume scanning */
5076 hci_resume_scan_sync(hdev);
182ee45d
LAD		 5077
5078 /* Resume monitor filters */
5079 hci_resume_monitor_sync(hdev);
5080
5081 /* Resume other advertisements */
5082 hci_resume_advertising_sync(hdev);
5083
5084 /* Resume discovery */
5085 hci_resume_discovery_sync(hdev);
5086
5087 return 0;
5088}
8e8b92ee
LAD		 5089
5090static bool conn_use_rpa(struct hci_conn *conn)
5091{
5092 struct hci_dev *hdev = conn->hdev;
5093
5094 return hci_dev_test_flag(hdev, HCI_PRIVACY);
5095}
5096
5097static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
5098 struct hci_conn *conn)
5099{
5100 struct hci_cp_le_set_ext_adv_params cp;
5101 int err;
5102 bdaddr_t random_addr;
5103 u8 own_addr_type;
5104
5105 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5106 &own_addr_type);
5107 if (err)
5108 return err;
5109
5110 /* Set require_privacy to false so that the remote device has a
5111 * chance of identifying us.
5112 */
5113 err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
5114 &own_addr_type, &random_addr);
5115 if (err)
5116 return err;
5117
5118 memset(&cp, 0, sizeof(cp));
5119
5120 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
5121 cp.own_addr_type = own_addr_type;
5122 cp.channel_map = hdev->le_adv_channel_map;
5123 cp.tx_power = HCI_TX_POWER_INVALID;
5124 cp.primary_phy = HCI_ADV_PHY_1M;
5125 cp.secondary_phy = HCI_ADV_PHY_1M;
5126 cp.handle = 0x00; /* Use instance 0 for directed adv */
5127 cp.own_addr_type = own_addr_type;
5128 cp.peer_addr_type = conn->dst_type;
5129 bacpy(&cp.peer_addr, &conn->dst);
5130
5131 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
5132 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
5133 * does not supports advertising data when the advertising set already
5134 * contains some, the controller shall return erroc code 'Invalid
5135 * HCI Command Parameters(0x12).
5136 * So it is required to remove adv set for handle 0x00. since we use
5137 * instance 0 for directed adv.
5138 */
5139 err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
5140 if (err)
5141 return err;
5142
5143 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
5144 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5145 if (err)
5146 return err;
5147
5148 /* Check if random address need to be updated */
5149 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
5150 bacmp(&random_addr, BDADDR_ANY) &&
5151 bacmp(&random_addr, &hdev->random_addr)) {
5152 err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
5153 &random_addr);
5154 if (err)
5155 return err;
5156 }
5157
5158 return hci_enable_ext_advertising_sync(hdev, 0x00);
5159}
5160
5161static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
5162 struct hci_conn *conn)
5163{
5164 struct hci_cp_le_set_adv_param cp;
5165 u8 status;
5166 u8 own_addr_type;
5167 u8 enable;
5168
5169 if (ext_adv_capable(hdev))
5170 return hci_le_ext_directed_advertising_sync(hdev, conn);
5171
5172 /* Clear the HCI_LE_ADV bit temporarily so that the
5173 * hci_update_random_address knows that it's safe to go ahead
5174 * and write a new random address. The flag will be set back on
5175 * as soon as the SET_ADV_ENABLE HCI command completes.
5176 */
5177 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5178
5179 /* Set require_privacy to false so that the remote device has a
5180 * chance of identifying us.
5181 */
5182 status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5183 &own_addr_type);
5184 if (status)
5185 return status;
5186
5187 memset(&cp, 0, sizeof(cp));
5188
5189 /* Some controllers might reject command if intervals are not
5190 * within range for undirected advertising.
5191 * BCM20702A0 is known to be affected by this.
5192 */
5193 cp.min_interval = cpu_to_le16(0x0020);
5194 cp.max_interval = cpu_to_le16(0x0020);
5195
5196 cp.type = LE_ADV_DIRECT_IND;
5197 cp.own_address_type = own_addr_type;
5198 cp.direct_addr_type = conn->dst_type;
5199 bacpy(&cp.direct_addr, &conn->dst);
5200 cp.channel_map = hdev->le_adv_channel_map;
5201
5202 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
5203 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5204 if (status)
5205 return status;
5206
5207 enable = 0x01;
5208
5209 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
5210 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
5211}
5212
5213static void set_ext_conn_params(struct hci_conn *conn,
5214 struct hci_cp_le_ext_conn_param *p)
5215{
5216 struct hci_dev *hdev = conn->hdev;
5217
5218 memset(p, 0, sizeof(*p));
5219
5220 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
5221 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
5222 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
5223 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
5224 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
5225 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
5226 p->min_ce_len = cpu_to_le16(0x0000);
5227 p->max_ce_len = cpu_to_le16(0x0000);
5228}
5229
89a0b8b9
LAD		 5230static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
5231 struct hci_conn *conn, u8 own_addr_type)
8e8b92ee
LAD		 5232{
5233 struct hci_cp_le_ext_create_conn *cp;
5234 struct hci_cp_le_ext_conn_param *p;
5235 u8 data[sizeof(*cp) + sizeof(*p) * 3];
5236 u32 plen;
5237
5238 cp = (void *)data;
5239 p = (void *)cp->data;
5240
5241 memset(cp, 0, sizeof(*cp));
5242
5243 bacpy(&cp->peer_addr, &conn->dst);
5244 cp->peer_addr_type = conn->dst_type;
5245 cp->own_addr_type = own_addr_type;
5246
5247 plen = sizeof(*cp);
5248
5249 if (scan_1m(hdev)) {
5250 cp->phys |= LE_SCAN_PHY_1M;
5251 set_ext_conn_params(conn, p);
5252
5253 p++;
5254 plen += sizeof(*p);
5255 }
5256
5257 if (scan_2m(hdev)) {
5258 cp->phys |= LE_SCAN_PHY_2M;
5259 set_ext_conn_params(conn, p);
5260
5261 p++;
5262 plen += sizeof(*p);
5263 }
5264
5265 if (scan_coded(hdev)) {
5266 cp->phys |= LE_SCAN_PHY_CODED;
5267 set_ext_conn_params(conn, p);
5268
5269 plen += sizeof(*p);
5270 }
5271
6cd29ec6
LAD		 5272 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
5273 plen, data,
5274 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
a56a1138 5275 conn->conn_timeout, NULL);
8e8b92ee
LAD		 5276}
5277
5278int hci_le_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn)
5279{
5280 struct hci_cp_le_create_conn cp;
5281 struct hci_conn_params *params;
5282 u8 own_addr_type;
5283 int err;
5284
8e8b92ee
LAD		 5285 /* If requested to connect as peripheral use directed advertising */
5286 if (conn->role == HCI_ROLE_SLAVE) {
76d0685b
LAD		 5287 /* If we're active scanning and simultaneous roles is not
5288 * enabled simply reject the attempt.
8e8b92ee
LAD		 5289 */
5290 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
4fc9857a 5291 hdev->le_scan_type == LE_SCAN_ACTIVE &&
76d0685b 5292 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
8e8b92ee
LAD		 5293 hci_conn_del(conn);
5294 return -EBUSY;
5295 }
5296
4fc9857a
LAD		 5297 /* Pause advertising while doing directed advertising. */
5298 hci_pause_advertising_sync(hdev);
5299
8e8b92ee
LAD		 5300 err = hci_le_directed_advertising_sync(hdev, conn);
5301 goto done;
5302 }
5303
76d0685b
LAD		 5304 /* Disable advertising if simultaneous roles is not in use. */
5305 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
4fc9857a
LAD		 5306 hci_pause_advertising_sync(hdev);
5307
8e8b92ee
LAD		 5308 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
5309 if (params) {
5310 conn->le_conn_min_interval = params->conn_min_interval;
5311 conn->le_conn_max_interval = params->conn_max_interval;
5312 conn->le_conn_latency = params->conn_latency;
5313 conn->le_supv_timeout = params->supervision_timeout;
5314 } else {
5315 conn->le_conn_min_interval = hdev->le_conn_min_interval;
5316 conn->le_conn_max_interval = hdev->le_conn_max_interval;
5317 conn->le_conn_latency = hdev->le_conn_latency;
5318 conn->le_supv_timeout = hdev->le_supv_timeout;
5319 }
5320
5321 /* If controller is scanning, we stop it since some controllers are
5322 * not able to scan and connect at the same time. Also set the
5323 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
5324 * handler for scan disabling knows to set the correct discovery
5325 * state.
5326 */
5327 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5328 hci_scan_disable_sync(hdev);
5329 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
5330 }
5331
5332 /* Update random address, but set require_privacy to false so
5333 * that we never connect with an non-resolvable address.
5334 */
5335 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5336 &own_addr_type);
5337 if (err)
5338 goto done;
5339
5340 if (use_ext_conn(hdev)) {
5341 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
5342 goto done;
5343 }
5344
5345 memset(&cp, 0, sizeof(cp));
5346
5347 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
5348 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
5349
5350 bacpy(&cp.peer_addr, &conn->dst);
5351 cp.peer_addr_type = conn->dst_type;
5352 cp.own_address_type = own_addr_type;
5353 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
5354 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
5355 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
5356 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
5357 cp.min_ce_len = cpu_to_le16(0x0000);
5358 cp.max_ce_len = cpu_to_le16(0x0000);
5359
a56a1138
LAD		 5360 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
5361 *
5362 * If this event is unmasked and the HCI_LE_Connection_Complete event
5363 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
5364 * sent when a new connection has been created.
5365 */
6cd29ec6 5366 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
a56a1138
LAD		 5367 sizeof(cp), &cp,
5368 use_enhanced_conn_complete(hdev) ?
5369 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
5370 HCI_EV_LE_CONN_COMPLETE,
5371 conn->conn_timeout, NULL);
8e8b92ee
LAD		 5372
5373done:
4fc9857a 5374 /* Re-enable advertising after the connection attempt is finished. */
8e8b92ee
LAD		 5375 hci_resume_advertising_sync(hdev);
5376 return err;
5377}
Linux 6.x block layer and io_uring tree(s)