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