net/bluetooth/hci_sync.c

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