1 // SPDX-License-Identifier: GPL-2.0
3 * BlueZ - Bluetooth protocol stack for Linux
5 * Copyright (C) 2021 Intel Corporation
8 #include <linux/property.h>
10 #include <net/bluetooth/bluetooth.h>
11 #include <net/bluetooth/hci_core.h>
12 #include <net/bluetooth/mgmt.h>
14 #include "hci_request.h"
15 #include "hci_debugfs.h"
22 static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
25 bt_dev_dbg(hdev, "result 0x%2.2x", result);
27 if (hdev->req_status != HCI_REQ_PEND)
30 hdev->req_result = result;
31 hdev->req_status = HCI_REQ_DONE;
34 struct sock *sk = hci_skb_sk(skb);
36 /* Drop sk reference if set */
40 hdev->req_skb = skb_get(skb);
43 wake_up_interruptible(&hdev->req_wait_q);
46 static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode,
47 u32 plen, const void *param,
50 int len = HCI_COMMAND_HDR_SIZE + plen;
51 struct hci_command_hdr *hdr;
54 skb = bt_skb_alloc(len, GFP_ATOMIC);
58 hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
59 hdr->opcode = cpu_to_le16(opcode);
63 skb_put_data(skb, param, plen);
65 bt_dev_dbg(hdev, "skb len %d", skb->len);
67 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
68 hci_skb_opcode(skb) = opcode;
70 /* Grab a reference if command needs to be associated with a sock (e.g.
71 * likely mgmt socket that initiated the command).
81 static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen,
82 const void *param, u8 event, struct sock *sk)
84 struct hci_dev *hdev = req->hdev;
87 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
89 /* If an error occurred during request building, there is no point in
90 * queueing the HCI command. We can simply return.
95 skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk);
97 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
103 if (skb_queue_empty(&req->cmd_q))
104 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
106 hci_skb_event(skb) = event;
108 skb_queue_tail(&req->cmd_q, skb);
111 static int hci_cmd_sync_run(struct hci_request *req)
113 struct hci_dev *hdev = req->hdev;
117 bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q));
119 /* If an error occurred during request building, remove all HCI
120 * commands queued on the HCI request queue.
123 skb_queue_purge(&req->cmd_q);
127 /* Do not allow empty requests */
128 if (skb_queue_empty(&req->cmd_q))
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;
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);
139 queue_work(hdev->workqueue, &hdev->cmd_work);
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,
149 struct hci_request req;
153 bt_dev_dbg(hdev, "Opcode 0x%4x", opcode);
155 hci_req_init(&req, hdev);
157 hci_cmd_sync_add(&req, opcode, plen, param, event, sk);
159 hdev->req_status = HCI_REQ_PEND;
161 err = hci_cmd_sync_run(&req);
165 err = wait_event_interruptible_timeout(hdev->req_wait_q,
166 hdev->req_status != HCI_REQ_PEND,
169 if (err == -ERESTARTSYS)
170 return ERR_PTR(-EINTR);
172 switch (hdev->req_status) {
174 err = -bt_to_errno(hdev->req_result);
177 case HCI_REQ_CANCELED:
178 err = -hdev->req_result;
186 hdev->req_status = 0;
187 hdev->req_result = 0;
189 hdev->req_skb = NULL;
191 bt_dev_dbg(hdev, "end: err %d", err);
200 EXPORT_SYMBOL(__hci_cmd_sync_sk);
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)
206 return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL);
208 EXPORT_SYMBOL(__hci_cmd_sync);
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)
216 if (!test_bit(HCI_UP, &hdev->flags))
217 return ERR_PTR(-ENETDOWN);
219 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
221 hci_req_sync_lock(hdev);
222 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
223 hci_req_sync_unlock(hdev);
227 EXPORT_SYMBOL(hci_cmd_sync);
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)
233 return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout,
236 EXPORT_SYMBOL(__hci_cmd_sync_ev);
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,
246 skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
248 bt_dev_err(hdev, "Opcode 0x%4x failed: %ld", opcode,
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).
260 status = skb->data[0];
266 EXPORT_SYMBOL(__hci_cmd_sync_status_sk);
268 int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen,
269 const void *param, u32 timeout)
271 return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout,
274 EXPORT_SYMBOL(__hci_cmd_sync_status);
276 static void hci_cmd_sync_work(struct work_struct *work)
278 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work);
279 struct hci_cmd_sync_work_entry *entry;
280 hci_cmd_sync_work_func_t func;
281 hci_cmd_sync_work_destroy_t destroy;
284 bt_dev_dbg(hdev, "");
286 mutex_lock(&hdev->cmd_sync_work_lock);
287 entry = list_first_entry(&hdev->cmd_sync_work_list,
288 struct hci_cmd_sync_work_entry, list);
290 list_del(&entry->list);
293 destroy = entry->destroy;
300 mutex_unlock(&hdev->cmd_sync_work_lock);
305 hci_req_sync_lock(hdev);
307 err = func(hdev, data);
310 destroy(hdev, data, err);
312 hci_req_sync_unlock(hdev);
316 static void hci_cmd_sync_cancel_work(struct work_struct *work)
318 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work);
320 cancel_delayed_work_sync(&hdev->cmd_timer);
321 cancel_delayed_work_sync(&hdev->ncmd_timer);
322 atomic_set(&hdev->cmd_cnt, 1);
324 wake_up_interruptible(&hdev->req_wait_q);
327 void hci_cmd_sync_init(struct hci_dev *hdev)
329 INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work);
330 INIT_LIST_HEAD(&hdev->cmd_sync_work_list);
331 mutex_init(&hdev->cmd_sync_work_lock);
333 INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
336 void hci_cmd_sync_clear(struct hci_dev *hdev)
338 struct hci_cmd_sync_work_entry *entry, *tmp;
340 cancel_work_sync(&hdev->cmd_sync_work);
342 list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) {
344 entry->destroy(hdev, entry->data, -ECANCELED);
346 list_del(&entry->list);
351 void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
353 bt_dev_dbg(hdev, "err 0x%2.2x", err);
355 if (hdev->req_status == HCI_REQ_PEND) {
356 hdev->req_result = err;
357 hdev->req_status = HCI_REQ_CANCELED;
359 cancel_delayed_work_sync(&hdev->cmd_timer);
360 cancel_delayed_work_sync(&hdev->ncmd_timer);
361 atomic_set(&hdev->cmd_cnt, 1);
363 wake_up_interruptible(&hdev->req_wait_q);
367 void hci_cmd_sync_cancel(struct hci_dev *hdev, int err)
369 bt_dev_dbg(hdev, "err 0x%2.2x", err);
371 if (hdev->req_status == HCI_REQ_PEND) {
372 hdev->req_result = err;
373 hdev->req_status = HCI_REQ_CANCELED;
375 queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work);
378 EXPORT_SYMBOL(hci_cmd_sync_cancel);
380 int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
381 void *data, hci_cmd_sync_work_destroy_t destroy)
383 struct hci_cmd_sync_work_entry *entry;
385 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
391 entry->destroy = destroy;
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);
397 queue_work(hdev->req_workqueue, &hdev->cmd_sync_work);
401 EXPORT_SYMBOL(hci_cmd_sync_queue);
403 int hci_update_eir_sync(struct hci_dev *hdev)
405 struct hci_cp_write_eir cp;
407 bt_dev_dbg(hdev, "");
409 if (!hdev_is_powered(hdev))
412 if (!lmp_ext_inq_capable(hdev))
415 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
418 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
421 memset(&cp, 0, sizeof(cp));
423 eir_create(hdev, cp.data);
425 if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0)
428 memcpy(hdev->eir, cp.data, sizeof(cp.data));
430 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
434 static u8 get_service_classes(struct hci_dev *hdev)
436 struct bt_uuid *uuid;
439 list_for_each_entry(uuid, &hdev->uuids, list)
440 val |= uuid->svc_hint;
445 int hci_update_class_sync(struct hci_dev *hdev)
449 bt_dev_dbg(hdev, "");
451 if (!hdev_is_powered(hdev))
454 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
457 if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE))
460 cod[0] = hdev->minor_class;
461 cod[1] = hdev->major_class;
462 cod[2] = get_service_classes(hdev);
464 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
467 if (memcmp(cod, hdev->dev_class, 3) == 0)
470 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV,
471 sizeof(cod), cod, HCI_CMD_TIMEOUT);
474 static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
476 /* If there is no connection we are OK to advertise. */
477 if (hci_conn_num(hdev, LE_LINK) == 0)
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
485 if (!connectable && !(hdev->le_states[2] & 0x10))
488 /* Peripheral connection state and connectable mode bit 38
489 * and scannable bit 21.
491 if (connectable && (!(hdev->le_states[4] & 0x40) ||
492 !(hdev->le_states[2] & 0x20)))
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))
502 /* Central connection state and connectable mode bit 35 and
505 if (connectable && (!(hdev->le_states[4] & 0x08) ||
506 !(hdev->le_states[2] & 0x08)))
513 static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
515 /* If privacy is not enabled don't use RPA */
516 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
519 /* If basic privacy mode is enabled use RPA */
520 if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
523 /* If limited privacy mode is enabled don't use RPA if we're
524 * both discoverable and bondable.
526 if ((flags & MGMT_ADV_FLAG_DISCOV) &&
527 hci_dev_test_flag(hdev, HCI_BONDABLE))
530 /* We're neither bondable nor discoverable in the limited
531 * privacy mode, therefore use RPA.
536 static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa)
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).
545 * In this kind of scenario skip the update and let the random
546 * address be updated at the next cycle.
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);
555 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR,
556 6, rpa, HCI_CMD_TIMEOUT);
559 int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
560 bool rpa, u8 *own_addr_type)
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.
569 /* If Controller supports LL Privacy use own address type is
572 if (use_ll_privacy(hdev))
573 *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
575 *own_addr_type = ADDR_LE_DEV_RANDOM;
577 /* Check if RPA is valid */
581 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
583 bt_dev_err(hdev, "failed to generate new RPA");
587 err = hci_set_random_addr_sync(hdev, &hdev->rpa);
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.
598 if (require_privacy) {
602 /* The non-resolvable private address is generated
603 * from random six bytes with the two most significant
606 get_random_bytes(&nrpa, 6);
609 /* The non-resolvable private address shall not be
610 * equal to the public address.
612 if (bacmp(&hdev->bdaddr, &nrpa))
616 *own_addr_type = ADDR_LE_DEV_RANDOM;
618 return hci_set_random_addr_sync(hdev, &nrpa);
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
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.
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,
641 /* Neither privacy nor static address is being used so use a
644 *own_addr_type = ADDR_LE_DEV_PUBLIC;
649 static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
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];
656 /* If request specifies an instance that doesn't exist, fail */
658 struct adv_info *adv;
660 adv = hci_find_adv_instance(hdev, instance);
664 /* If not enabled there is nothing to do */
669 memset(data, 0, sizeof(data));
672 set = (void *)cp->data;
674 /* Instance 0x00 indicates all advertising instances will be disabled */
675 cp->num_of_sets = !!instance;
678 set->handle = instance;
680 size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets;
682 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
683 size, data, HCI_CMD_TIMEOUT);
686 static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance,
687 bdaddr_t *random_addr)
689 struct hci_cp_le_set_adv_set_rand_addr cp;
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.
698 err = hci_set_random_addr_sync(hdev, random_addr);
703 memset(&cp, 0, sizeof(cp));
705 cp.handle = instance;
706 bacpy(&cp.bdaddr, random_addr);
708 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
709 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
712 int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance)
714 struct hci_cp_le_set_ext_adv_params cp;
717 bdaddr_t random_addr;
720 struct adv_info *adv;
724 adv = hci_find_adv_instance(hdev, instance);
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.
735 if (adv && !adv->pending) {
736 err = hci_disable_ext_adv_instance_sync(hdev, instance);
741 flags = hci_adv_instance_flags(hdev, instance);
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.
746 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
747 mgmt_get_connectable(hdev);
749 if (!is_advertising_allowed(hdev, connectable))
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.
756 err = hci_get_random_address(hdev, !connectable,
757 adv_use_rpa(hdev, flags), adv,
758 &own_addr_type, &random_addr);
762 memset(&cp, 0, sizeof(cp));
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;
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;
774 secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK);
778 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND);
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)) {
784 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND);
786 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND);
789 cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND);
791 cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
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.
801 if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED)
802 hci_copy_identity_address(hdev, &cp.peer_addr,
805 cp.own_addr_type = own_addr_type;
806 cp.channel_map = hdev->le_adv_channel_map;
807 cp.handle = instance;
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;
816 /* In all other cases use 1M */
817 cp.primary_phy = HCI_ADV_PHY_1M;
818 cp.secondary_phy = HCI_ADV_PHY_1M;
821 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
822 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
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 */
831 if (!bacmp(&random_addr, &adv->random_addr))
834 if (!bacmp(&random_addr, &hdev->random_addr))
838 return hci_set_adv_set_random_addr_sync(hdev, instance,
845 static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
848 struct hci_cp_le_set_ext_scan_rsp_data cp;
849 u8 data[HCI_MAX_EXT_AD_LENGTH];
853 memset(&pdu, 0, sizeof(pdu));
855 len = eir_create_scan_rsp(hdev, instance, pdu.data);
857 if (hdev->scan_rsp_data_len == len &&
858 !memcmp(pdu.data, hdev->scan_rsp_data, len))
861 memcpy(hdev->scan_rsp_data, pdu.data, len);
862 hdev->scan_rsp_data_len = len;
864 pdu.cp.handle = instance;
866 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
867 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
869 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA,
870 sizeof(pdu.cp) + len, &pdu.cp,
874 static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
876 struct hci_cp_le_set_scan_rsp_data cp;
879 memset(&cp, 0, sizeof(cp));
881 len = eir_create_scan_rsp(hdev, instance, cp.data);
883 if (hdev->scan_rsp_data_len == len &&
884 !memcmp(cp.data, hdev->scan_rsp_data, len))
887 memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
888 hdev->scan_rsp_data_len = len;
892 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA,
893 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
896 int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance)
898 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
901 if (ext_adv_capable(hdev))
902 return hci_set_ext_scan_rsp_data_sync(hdev, instance);
904 return __hci_set_scan_rsp_data_sync(hdev, instance);
907 int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance)
909 struct hci_cp_le_set_ext_adv_enable *cp;
910 struct hci_cp_ext_adv_set *set;
911 u8 data[sizeof(*cp) + sizeof(*set) * 1];
912 struct adv_info *adv;
915 adv = hci_find_adv_instance(hdev, instance);
918 /* If already enabled there is nothing to do */
926 set = (void *)cp->data;
928 memset(cp, 0, sizeof(*cp));
931 cp->num_of_sets = 0x01;
933 memset(set, 0, sizeof(*set));
935 set->handle = instance;
937 /* Set duration per instance since controller is responsible for
940 if (adv && adv->timeout) {
941 u16 duration = adv->timeout * MSEC_PER_SEC;
943 /* Time = N * 10 ms */
944 set->duration = cpu_to_le16(duration / 10);
947 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE,
949 sizeof(*set) * cp->num_of_sets,
950 data, HCI_CMD_TIMEOUT);
953 int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance)
957 err = hci_setup_ext_adv_instance_sync(hdev, instance);
961 err = hci_set_ext_scan_rsp_data_sync(hdev, instance);
965 return hci_enable_ext_advertising_sync(hdev, instance);
968 static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance)
972 if (ext_adv_capable(hdev))
973 return hci_start_ext_adv_sync(hdev, instance);
975 err = hci_update_adv_data_sync(hdev, instance);
979 err = hci_update_scan_rsp_data_sync(hdev, instance);
983 return hci_enable_advertising_sync(hdev);
986 int hci_enable_advertising_sync(struct hci_dev *hdev)
988 struct adv_info *adv_instance;
989 struct hci_cp_le_set_adv_param cp;
990 u8 own_addr_type, enable = 0x01;
992 u16 adv_min_interval, adv_max_interval;
996 if (ext_adv_capable(hdev))
997 return hci_enable_ext_advertising_sync(hdev,
998 hdev->cur_adv_instance);
1000 flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance);
1001 adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
1003 /* If the "connectable" instance flag was not set, then choose between
1004 * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
1006 connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
1007 mgmt_get_connectable(hdev);
1009 if (!is_advertising_allowed(hdev, connectable))
1012 status = hci_disable_advertising_sync(hdev);
1016 /* Clear the HCI_LE_ADV bit temporarily so that the
1017 * hci_update_random_address knows that it's safe to go ahead
1018 * and write a new random address. The flag will be set back on
1019 * as soon as the SET_ADV_ENABLE HCI command completes.
1021 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1023 /* Set require_privacy to true only when non-connectable
1024 * advertising is used. In that case it is fine to use a
1025 * non-resolvable private address.
1027 status = hci_update_random_address_sync(hdev, !connectable,
1028 adv_use_rpa(hdev, flags),
1033 memset(&cp, 0, sizeof(cp));
1036 adv_min_interval = adv_instance->min_interval;
1037 adv_max_interval = adv_instance->max_interval;
1039 adv_min_interval = hdev->le_adv_min_interval;
1040 adv_max_interval = hdev->le_adv_max_interval;
1044 cp.type = LE_ADV_IND;
1046 if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance))
1047 cp.type = LE_ADV_SCAN_IND;
1049 cp.type = LE_ADV_NONCONN_IND;
1051 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) ||
1052 hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
1053 adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN;
1054 adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX;
1058 cp.min_interval = cpu_to_le16(adv_min_interval);
1059 cp.max_interval = cpu_to_le16(adv_max_interval);
1060 cp.own_address_type = own_addr_type;
1061 cp.channel_map = hdev->le_adv_channel_map;
1063 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
1064 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1068 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1069 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1072 static int enable_advertising_sync(struct hci_dev *hdev, void *data)
1074 return hci_enable_advertising_sync(hdev);
1077 int hci_enable_advertising(struct hci_dev *hdev)
1079 if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
1080 list_empty(&hdev->adv_instances))
1083 return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
1086 int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1091 if (!ext_adv_capable(hdev))
1094 err = hci_disable_ext_adv_instance_sync(hdev, instance);
1098 /* If request specifies an instance that doesn't exist, fail */
1099 if (instance > 0 && !hci_find_adv_instance(hdev, instance))
1102 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET,
1103 sizeof(instance), &instance, 0,
1104 HCI_CMD_TIMEOUT, sk);
1107 static void cancel_adv_timeout(struct hci_dev *hdev)
1109 if (hdev->adv_instance_timeout) {
1110 hdev->adv_instance_timeout = 0;
1111 cancel_delayed_work(&hdev->adv_instance_expire);
1115 static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance)
1118 struct hci_cp_le_set_ext_adv_data cp;
1119 u8 data[HCI_MAX_EXT_AD_LENGTH];
1123 memset(&pdu, 0, sizeof(pdu));
1125 len = eir_create_adv_data(hdev, instance, pdu.data);
1127 /* There's nothing to do if the data hasn't changed */
1128 if (hdev->adv_data_len == len &&
1129 memcmp(pdu.data, hdev->adv_data, len) == 0)
1132 memcpy(hdev->adv_data, pdu.data, len);
1133 hdev->adv_data_len = len;
1135 pdu.cp.length = len;
1136 pdu.cp.handle = instance;
1137 pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE;
1138 pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG;
1140 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA,
1141 sizeof(pdu.cp) + len, &pdu.cp,
1145 static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance)
1147 struct hci_cp_le_set_adv_data cp;
1150 memset(&cp, 0, sizeof(cp));
1152 len = eir_create_adv_data(hdev, instance, cp.data);
1154 /* There's nothing to do if the data hasn't changed */
1155 if (hdev->adv_data_len == len &&
1156 memcmp(cp.data, hdev->adv_data, len) == 0)
1159 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1160 hdev->adv_data_len = len;
1164 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA,
1165 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1168 int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance)
1170 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1173 if (ext_adv_capable(hdev))
1174 return hci_set_ext_adv_data_sync(hdev, instance);
1176 return hci_set_adv_data_sync(hdev, instance);
1179 int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance,
1182 struct adv_info *adv = NULL;
1185 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev))
1188 if (hdev->adv_instance_timeout)
1191 adv = hci_find_adv_instance(hdev, instance);
1195 /* A zero timeout means unlimited advertising. As long as there is
1196 * only one instance, duration should be ignored. We still set a timeout
1197 * in case further instances are being added later on.
1199 * If the remaining lifetime of the instance is more than the duration
1200 * then the timeout corresponds to the duration, otherwise it will be
1201 * reduced to the remaining instance lifetime.
1203 if (adv->timeout == 0 || adv->duration <= adv->remaining_time)
1204 timeout = adv->duration;
1206 timeout = adv->remaining_time;
1208 /* The remaining time is being reduced unless the instance is being
1209 * advertised without time limit.
1212 adv->remaining_time = adv->remaining_time - timeout;
1214 /* Only use work for scheduling instances with legacy advertising */
1215 if (!ext_adv_capable(hdev)) {
1216 hdev->adv_instance_timeout = timeout;
1217 queue_delayed_work(hdev->req_workqueue,
1218 &hdev->adv_instance_expire,
1219 msecs_to_jiffies(timeout * 1000));
1222 /* If we're just re-scheduling the same instance again then do not
1223 * execute any HCI commands. This happens when a single instance is
1226 if (!force && hdev->cur_adv_instance == instance &&
1227 hci_dev_test_flag(hdev, HCI_LE_ADV))
1230 hdev->cur_adv_instance = instance;
1232 return hci_start_adv_sync(hdev, instance);
1235 static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk)
1239 if (!ext_adv_capable(hdev))
1242 /* Disable instance 0x00 to disable all instances */
1243 err = hci_disable_ext_adv_instance_sync(hdev, 0x00);
1247 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS,
1248 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1251 static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force)
1253 struct adv_info *adv, *n;
1255 if (ext_adv_capable(hdev))
1256 /* Remove all existing sets */
1257 return hci_clear_adv_sets_sync(hdev, sk);
1259 /* This is safe as long as there is no command send while the lock is
1264 /* Cleanup non-ext instances */
1265 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1266 u8 instance = adv->instance;
1269 if (!(force || adv->timeout))
1272 err = hci_remove_adv_instance(hdev, instance);
1274 mgmt_advertising_removed(sk, hdev, instance);
1277 hci_dev_unlock(hdev);
1282 static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance,
1287 /* If we use extended advertising, instance has to be removed first. */
1288 if (ext_adv_capable(hdev))
1289 return hci_remove_ext_adv_instance_sync(hdev, instance, sk);
1291 /* This is safe as long as there is no command send while the lock is
1296 err = hci_remove_adv_instance(hdev, instance);
1298 mgmt_advertising_removed(sk, hdev, instance);
1300 hci_dev_unlock(hdev);
1305 /* For a single instance:
1306 * - force == true: The instance will be removed even when its remaining
1307 * lifetime is not zero.
1308 * - force == false: the instance will be deactivated but kept stored unless
1309 * the remaining lifetime is zero.
1311 * For instance == 0x00:
1312 * - force == true: All instances will be removed regardless of their timeout
1314 * - force == false: Only instances that have a timeout will be removed.
1316 int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk,
1317 u8 instance, bool force)
1319 struct adv_info *next = NULL;
1322 /* Cancel any timeout concerning the removed instance(s). */
1323 if (!instance || hdev->cur_adv_instance == instance)
1324 cancel_adv_timeout(hdev);
1326 /* Get the next instance to advertise BEFORE we remove
1327 * the current one. This can be the same instance again
1328 * if there is only one instance.
1330 if (hdev->cur_adv_instance == instance)
1331 next = hci_get_next_instance(hdev, instance);
1334 err = hci_clear_adv_sync(hdev, sk, force);
1338 struct adv_info *adv = hci_find_adv_instance(hdev, instance);
1340 if (force || (adv && adv->timeout && !adv->remaining_time)) {
1341 /* Don't advertise a removed instance. */
1342 if (next && next->instance == instance)
1345 err = hci_remove_adv_sync(hdev, instance, sk);
1351 if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING))
1354 if (next && !ext_adv_capable(hdev))
1355 hci_schedule_adv_instance_sync(hdev, next->instance, false);
1360 int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
1362 struct hci_cp_read_rssi cp;
1365 return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI,
1366 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1369 int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
1371 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
1372 sizeof(*cp), cp, HCI_CMD_TIMEOUT);
1375 int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
1377 struct hci_cp_read_tx_power cp;
1381 return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER,
1382 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1385 int hci_disable_advertising_sync(struct hci_dev *hdev)
1389 /* If controller is not advertising we are done. */
1390 if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
1393 if (ext_adv_capable(hdev))
1394 return hci_disable_ext_adv_instance_sync(hdev, 0x00);
1396 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
1397 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
1400 static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val,
1403 struct hci_cp_le_set_ext_scan_enable cp;
1405 memset(&cp, 0, sizeof(cp));
1407 cp.filter_dup = filter_dup;
1409 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE,
1410 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1413 static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val,
1416 struct hci_cp_le_set_scan_enable cp;
1418 if (use_ext_scan(hdev))
1419 return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup);
1421 memset(&cp, 0, sizeof(cp));
1423 cp.filter_dup = filter_dup;
1425 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE,
1426 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1429 static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val)
1431 if (!use_ll_privacy(hdev))
1434 /* If controller is not/already resolving we are done. */
1435 if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
1438 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
1439 sizeof(val), &val, HCI_CMD_TIMEOUT);
1442 static int hci_scan_disable_sync(struct hci_dev *hdev)
1446 /* If controller is not scanning we are done. */
1447 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
1450 if (hdev->scanning_paused) {
1451 bt_dev_dbg(hdev, "Scanning is paused for suspend");
1455 err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
1457 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
1464 static bool scan_use_rpa(struct hci_dev *hdev)
1466 return hci_dev_test_flag(hdev, HCI_PRIVACY);
1469 static void hci_start_interleave_scan(struct hci_dev *hdev)
1471 hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
1472 queue_delayed_work(hdev->req_workqueue,
1473 &hdev->interleave_scan, 0);
1476 static bool is_interleave_scanning(struct hci_dev *hdev)
1478 return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
1481 static void cancel_interleave_scan(struct hci_dev *hdev)
1483 bt_dev_dbg(hdev, "cancelling interleave scan");
1485 cancel_delayed_work_sync(&hdev->interleave_scan);
1487 hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
1490 /* Return true if interleave_scan wasn't started until exiting this function,
1491 * otherwise, return false
1493 static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev)
1495 /* Do interleaved scan only if all of the following are true:
1496 * - There is at least one ADV monitor
1497 * - At least one pending LE connection or one device to be scanned for
1498 * - Monitor offloading is not supported
1499 * If so, we should alternate between allowlist scan and one without
1500 * any filters to save power.
1502 bool use_interleaving = hci_is_adv_monitoring(hdev) &&
1503 !(list_empty(&hdev->pend_le_conns) &&
1504 list_empty(&hdev->pend_le_reports)) &&
1505 hci_get_adv_monitor_offload_ext(hdev) ==
1506 HCI_ADV_MONITOR_EXT_NONE;
1507 bool is_interleaving = is_interleave_scanning(hdev);
1509 if (use_interleaving && !is_interleaving) {
1510 hci_start_interleave_scan(hdev);
1511 bt_dev_dbg(hdev, "starting interleave scan");
1515 if (!use_interleaving && is_interleaving)
1516 cancel_interleave_scan(hdev);
1521 /* Removes connection to resolve list if needed.*/
1522 static int hci_le_del_resolve_list_sync(struct hci_dev *hdev,
1523 bdaddr_t *bdaddr, u8 bdaddr_type)
1525 struct hci_cp_le_del_from_resolv_list cp;
1526 struct bdaddr_list_with_irk *entry;
1528 if (!use_ll_privacy(hdev))
1531 /* Check if the IRK has been programmed */
1532 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr,
1537 cp.bdaddr_type = bdaddr_type;
1538 bacpy(&cp.bdaddr, bdaddr);
1540 return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST,
1541 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1544 static int hci_le_del_accept_list_sync(struct hci_dev *hdev,
1545 bdaddr_t *bdaddr, u8 bdaddr_type)
1547 struct hci_cp_le_del_from_accept_list cp;
1550 /* Check if device is on accept list before removing it */
1551 if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type))
1554 cp.bdaddr_type = bdaddr_type;
1555 bacpy(&cp.bdaddr, bdaddr);
1557 /* Ignore errors when removing from resolving list as that is likely
1558 * that the device was never added.
1560 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
1562 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
1563 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1565 bt_dev_err(hdev, "Unable to remove from allow list: %d", err);
1569 bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr,
1575 /* Adds connection to resolve list if needed.
1576 * Setting params to NULL programs local hdev->irk
1578 static int hci_le_add_resolve_list_sync(struct hci_dev *hdev,
1579 struct hci_conn_params *params)
1581 struct hci_cp_le_add_to_resolv_list cp;
1582 struct smp_irk *irk;
1583 struct bdaddr_list_with_irk *entry;
1585 if (!use_ll_privacy(hdev))
1588 /* Attempt to program local identity address, type and irk if params is
1592 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
1595 hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type);
1596 memcpy(cp.peer_irk, hdev->irk, 16);
1600 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
1604 /* Check if the IK has _not_ been programmed yet. */
1605 entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list,
1611 cp.bdaddr_type = params->addr_type;
1612 bacpy(&cp.bdaddr, ¶ms->addr);
1613 memcpy(cp.peer_irk, irk->val, 16);
1616 if (hci_dev_test_flag(hdev, HCI_PRIVACY))
1617 memcpy(cp.local_irk, hdev->irk, 16);
1619 memset(cp.local_irk, 0, 16);
1621 return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST,
1622 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1625 /* Set Device Privacy Mode. */
1626 static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev,
1627 struct hci_conn_params *params)
1629 struct hci_cp_le_set_privacy_mode cp;
1630 struct smp_irk *irk;
1632 /* If device privacy mode has already been set there is nothing to do */
1633 if (params->privacy_mode == HCI_DEVICE_PRIVACY)
1636 /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also
1637 * indicates that LL Privacy has been enabled and
1638 * HCI_OP_LE_SET_PRIVACY_MODE is supported.
1640 if (!test_bit(HCI_CONN_FLAG_DEVICE_PRIVACY, params->flags))
1643 irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type);
1647 memset(&cp, 0, sizeof(cp));
1648 cp.bdaddr_type = irk->addr_type;
1649 bacpy(&cp.bdaddr, &irk->bdaddr);
1650 cp.mode = HCI_DEVICE_PRIVACY;
1652 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE,
1653 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1656 /* Adds connection to allow list if needed, if the device uses RPA (has IRK)
1657 * this attempts to program the device in the resolving list as well and
1658 * properly set the privacy mode.
1660 static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
1661 struct hci_conn_params *params,
1664 struct hci_cp_le_add_to_accept_list cp;
1667 /* Select filter policy to accept all advertising */
1668 if (*num_entries >= hdev->le_accept_list_size)
1671 /* Accept list can not be used with RPAs */
1672 if (!use_ll_privacy(hdev) &&
1673 hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type)) {
1677 /* During suspend, only wakeable devices can be in acceptlist */
1678 if (hdev->suspended &&
1679 !test_bit(HCI_CONN_FLAG_REMOTE_WAKEUP, params->flags))
1682 /* Attempt to program the device in the resolving list first to avoid
1683 * having to rollback in case it fails since the resolving list is
1684 * dynamic it can probably be smaller than the accept list.
1686 err = hci_le_add_resolve_list_sync(hdev, params);
1688 bt_dev_err(hdev, "Unable to add to resolve list: %d", err);
1692 /* Set Privacy Mode */
1693 err = hci_le_set_privacy_mode_sync(hdev, params);
1695 bt_dev_err(hdev, "Unable to set privacy mode: %d", err);
1699 /* Check if already in accept list */
1700 if (hci_bdaddr_list_lookup(&hdev->le_accept_list, ¶ms->addr,
1705 cp.bdaddr_type = params->addr_type;
1706 bacpy(&cp.bdaddr, ¶ms->addr);
1708 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST,
1709 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
1711 bt_dev_err(hdev, "Unable to add to allow list: %d", err);
1712 /* Rollback the device from the resolving list */
1713 hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type);
1717 bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr,
1723 /* This function disables/pause all advertising instances */
1724 static int hci_pause_advertising_sync(struct hci_dev *hdev)
1729 /* If already been paused there is nothing to do. */
1730 if (hdev->advertising_paused)
1733 bt_dev_dbg(hdev, "Pausing directed advertising");
1735 /* Stop directed advertising */
1736 old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
1738 /* When discoverable timeout triggers, then just make sure
1739 * the limited discoverable flag is cleared. Even in the case
1740 * of a timeout triggered from general discoverable, it is
1741 * safe to unconditionally clear the flag.
1743 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1744 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1745 hdev->discov_timeout = 0;
1748 bt_dev_dbg(hdev, "Pausing advertising instances");
1750 /* Call to disable any advertisements active on the controller.
1751 * This will succeed even if no advertisements are configured.
1753 err = hci_disable_advertising_sync(hdev);
1757 /* If we are using software rotation, pause the loop */
1758 if (!ext_adv_capable(hdev))
1759 cancel_adv_timeout(hdev);
1761 hdev->advertising_paused = true;
1762 hdev->advertising_old_state = old_state;
1767 /* This function enables all user advertising instances */
1768 static int hci_resume_advertising_sync(struct hci_dev *hdev)
1770 struct adv_info *adv, *tmp;
1773 /* If advertising has not been paused there is nothing to do. */
1774 if (!hdev->advertising_paused)
1777 /* Resume directed advertising */
1778 hdev->advertising_paused = false;
1779 if (hdev->advertising_old_state) {
1780 hci_dev_set_flag(hdev, HCI_ADVERTISING);
1781 hdev->advertising_old_state = 0;
1784 bt_dev_dbg(hdev, "Resuming advertising instances");
1786 if (ext_adv_capable(hdev)) {
1787 /* Call for each tracked instance to be re-enabled */
1788 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) {
1789 err = hci_enable_ext_advertising_sync(hdev,
1794 /* If the instance cannot be resumed remove it */
1795 hci_remove_ext_adv_instance_sync(hdev, adv->instance,
1799 /* Schedule for most recent instance to be restarted and begin
1800 * the software rotation loop
1802 err = hci_schedule_adv_instance_sync(hdev,
1803 hdev->cur_adv_instance,
1807 hdev->advertising_paused = false;
1812 struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev,
1813 bool extended, struct sock *sk)
1815 u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA :
1816 HCI_OP_READ_LOCAL_OOB_DATA;
1818 return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk);
1821 /* Device must not be scanning when updating the accept list.
1823 * Update is done using the following sequence:
1825 * use_ll_privacy((Disable Advertising) -> Disable Resolving List) ->
1826 * Remove Devices From Accept List ->
1827 * (has IRK && use_ll_privacy(Remove Devices From Resolving List))->
1828 * Add Devices to Accept List ->
1829 * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) ->
1830 * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) ->
1833 * In case of failure advertising shall be restored to its original state and
1834 * return would disable accept list since either accept or resolving list could
1835 * not be programmed.
1838 static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
1840 struct hci_conn_params *params;
1841 struct bdaddr_list *b, *t;
1843 bool pend_conn, pend_report;
1847 /* Pause advertising if resolving list can be used as controllers are
1848 * cannot accept resolving list modifications while advertising.
1850 if (use_ll_privacy(hdev)) {
1851 err = hci_pause_advertising_sync(hdev);
1853 bt_dev_err(hdev, "pause advertising failed: %d", err);
1858 /* Disable address resolution while reprogramming accept list since
1859 * devices that do have an IRK will be programmed in the resolving list
1860 * when LL Privacy is enabled.
1862 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
1864 bt_dev_err(hdev, "Unable to disable LL privacy: %d", err);
1868 /* Go through the current accept list programmed into the
1869 * controller one by one and check if that address is still
1870 * in the list of pending connections or list of devices to
1871 * report. If not present in either list, then remove it from
1874 list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) {
1875 pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns,
1878 pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports,
1882 /* If the device is not likely to connect or report,
1883 * remove it from the acceptlist.
1885 if (!pend_conn && !pend_report) {
1886 hci_le_del_accept_list_sync(hdev, &b->bdaddr,
1894 /* Since all no longer valid accept list entries have been
1895 * removed, walk through the list of pending connections
1896 * and ensure that any new device gets programmed into
1899 * If the list of the devices is larger than the list of
1900 * available accept list entries in the controller, then
1901 * just abort and return filer policy value to not use the
1904 list_for_each_entry(params, &hdev->pend_le_conns, action) {
1905 err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
1910 /* After adding all new pending connections, walk through
1911 * the list of pending reports and also add these to the
1912 * accept list if there is still space. Abort if space runs out.
1914 list_for_each_entry(params, &hdev->pend_le_reports, action) {
1915 err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
1920 /* Use the allowlist unless the following conditions are all true:
1921 * - We are not currently suspending
1922 * - There are 1 or more ADV monitors registered and it's not offloaded
1923 * - Interleaved scanning is not currently using the allowlist
1925 if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
1926 hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE &&
1927 hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
1931 filter_policy = err ? 0x00 : 0x01;
1933 /* Enable address resolution when LL Privacy is enabled. */
1934 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
1936 bt_dev_err(hdev, "Unable to enable LL privacy: %d", err);
1938 /* Resume advertising if it was paused */
1939 if (use_ll_privacy(hdev))
1940 hci_resume_advertising_sync(hdev);
1942 /* Select filter policy to use accept list */
1943 return filter_policy;
1946 /* Returns true if an le connection is in the scanning state */
1947 static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
1949 struct hci_conn_hash *h = &hdev->conn_hash;
1954 list_for_each_entry_rcu(c, &h->list, list) {
1955 if (c->type == LE_LINK && c->state == BT_CONNECT &&
1956 test_bit(HCI_CONN_SCANNING, &c->flags)) {
1967 static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type,
1968 u16 interval, u16 window,
1969 u8 own_addr_type, u8 filter_policy)
1971 struct hci_cp_le_set_ext_scan_params *cp;
1972 struct hci_cp_le_scan_phy_params *phy;
1973 u8 data[sizeof(*cp) + sizeof(*phy) * 2];
1977 phy = (void *)cp->data;
1979 memset(data, 0, sizeof(data));
1981 cp->own_addr_type = own_addr_type;
1982 cp->filter_policy = filter_policy;
1984 if (scan_1m(hdev) || scan_2m(hdev)) {
1985 cp->scanning_phys |= LE_SCAN_PHY_1M;
1988 phy->interval = cpu_to_le16(interval);
1989 phy->window = cpu_to_le16(window);
1995 if (scan_coded(hdev)) {
1996 cp->scanning_phys |= LE_SCAN_PHY_CODED;
1999 phy->interval = cpu_to_le16(interval);
2000 phy->window = cpu_to_le16(window);
2006 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS,
2007 sizeof(*cp) + sizeof(*phy) * num_phy,
2008 data, HCI_CMD_TIMEOUT);
2011 static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type,
2012 u16 interval, u16 window,
2013 u8 own_addr_type, u8 filter_policy)
2015 struct hci_cp_le_set_scan_param cp;
2017 if (use_ext_scan(hdev))
2018 return hci_le_set_ext_scan_param_sync(hdev, type, interval,
2019 window, own_addr_type,
2022 memset(&cp, 0, sizeof(cp));
2024 cp.interval = cpu_to_le16(interval);
2025 cp.window = cpu_to_le16(window);
2026 cp.own_address_type = own_addr_type;
2027 cp.filter_policy = filter_policy;
2029 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM,
2030 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2033 static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
2034 u16 window, u8 own_addr_type, u8 filter_policy,
2039 if (hdev->scanning_paused) {
2040 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2044 err = hci_le_set_scan_param_sync(hdev, type, interval, window,
2045 own_addr_type, filter_policy);
2049 return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
2052 static int hci_passive_scan_sync(struct hci_dev *hdev)
2056 u16 window, interval;
2059 if (hdev->scanning_paused) {
2060 bt_dev_dbg(hdev, "Scanning is paused for suspend");
2064 err = hci_scan_disable_sync(hdev);
2066 bt_dev_err(hdev, "disable scanning failed: %d", err);
2070 /* Set require_privacy to false since no SCAN_REQ are send
2071 * during passive scanning. Not using an non-resolvable address
2072 * here is important so that peer devices using direct
2073 * advertising with our address will be correctly reported
2074 * by the controller.
2076 if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev),
2080 if (hdev->enable_advmon_interleave_scan &&
2081 hci_update_interleaved_scan_sync(hdev))
2084 bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
2086 /* Adding or removing entries from the accept list must
2087 * happen before enabling scanning. The controller does
2088 * not allow accept list modification while scanning.
2090 filter_policy = hci_update_accept_list_sync(hdev);
2092 /* When the controller is using random resolvable addresses and
2093 * with that having LE privacy enabled, then controllers with
2094 * Extended Scanner Filter Policies support can now enable support
2095 * for handling directed advertising.
2097 * So instead of using filter polices 0x00 (no acceptlist)
2098 * and 0x01 (acceptlist enabled) use the new filter policies
2099 * 0x02 (no acceptlist) and 0x03 (acceptlist enabled).
2101 if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
2102 (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
2103 filter_policy |= 0x02;
2105 if (hdev->suspended) {
2106 window = hdev->le_scan_window_suspend;
2107 interval = hdev->le_scan_int_suspend;
2108 } else if (hci_is_le_conn_scanning(hdev)) {
2109 window = hdev->le_scan_window_connect;
2110 interval = hdev->le_scan_int_connect;
2111 } else if (hci_is_adv_monitoring(hdev)) {
2112 window = hdev->le_scan_window_adv_monitor;
2113 interval = hdev->le_scan_int_adv_monitor;
2115 window = hdev->le_scan_window;
2116 interval = hdev->le_scan_interval;
2119 bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
2121 return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
2122 own_addr_type, filter_policy,
2123 LE_SCAN_FILTER_DUP_ENABLE);
2126 /* This function controls the passive scanning based on hdev->pend_le_conns
2127 * list. If there are pending LE connection we start the background scanning,
2128 * otherwise we stop it in the following sequence:
2130 * If there are devices to scan:
2132 * Disable Scanning -> Update Accept List ->
2133 * use_ll_privacy((Disable Advertising) -> Disable Resolving List ->
2134 * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) ->
2141 int hci_update_passive_scan_sync(struct hci_dev *hdev)
2145 if (!test_bit(HCI_UP, &hdev->flags) ||
2146 test_bit(HCI_INIT, &hdev->flags) ||
2147 hci_dev_test_flag(hdev, HCI_SETUP) ||
2148 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2149 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2150 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2153 /* No point in doing scanning if LE support hasn't been enabled */
2154 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2157 /* If discovery is active don't interfere with it */
2158 if (hdev->discovery.state != DISCOVERY_STOPPED)
2161 /* Reset RSSI and UUID filters when starting background scanning
2162 * since these filters are meant for service discovery only.
2164 * The Start Discovery and Start Service Discovery operations
2165 * ensure to set proper values for RSSI threshold and UUID
2166 * filter list. So it is safe to just reset them here.
2168 hci_discovery_filter_clear(hdev);
2170 bt_dev_dbg(hdev, "ADV monitoring is %s",
2171 hci_is_adv_monitoring(hdev) ? "on" : "off");
2173 if (list_empty(&hdev->pend_le_conns) &&
2174 list_empty(&hdev->pend_le_reports) &&
2175 !hci_is_adv_monitoring(hdev)) {
2176 /* If there is no pending LE connections or devices
2177 * to be scanned for or no ADV monitors, we should stop the
2178 * background scanning.
2181 bt_dev_dbg(hdev, "stopping background scanning");
2183 err = hci_scan_disable_sync(hdev);
2185 bt_dev_err(hdev, "stop background scanning failed: %d",
2188 /* If there is at least one pending LE connection, we should
2189 * keep the background scan running.
2192 /* If controller is connecting, we should not start scanning
2193 * since some controllers are not able to scan and connect at
2196 if (hci_lookup_le_connect(hdev))
2199 bt_dev_dbg(hdev, "start background scanning");
2201 err = hci_passive_scan_sync(hdev);
2203 bt_dev_err(hdev, "start background scanning failed: %d",
2210 static int update_passive_scan_sync(struct hci_dev *hdev, void *data)
2212 return hci_update_passive_scan_sync(hdev);
2215 int hci_update_passive_scan(struct hci_dev *hdev)
2217 /* Only queue if it would have any effect */
2218 if (!test_bit(HCI_UP, &hdev->flags) ||
2219 test_bit(HCI_INIT, &hdev->flags) ||
2220 hci_dev_test_flag(hdev, HCI_SETUP) ||
2221 hci_dev_test_flag(hdev, HCI_CONFIG) ||
2222 hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
2223 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2226 return hci_cmd_sync_queue(hdev, update_passive_scan_sync, NULL, NULL);
2229 int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val)
2233 if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev))
2236 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
2237 sizeof(val), &val, HCI_CMD_TIMEOUT);
2241 hdev->features[1][0] |= LMP_HOST_SC;
2242 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
2244 hdev->features[1][0] &= ~LMP_HOST_SC;
2245 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
2252 int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode)
2256 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
2257 lmp_host_ssp_capable(hdev))
2260 if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) {
2261 __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
2262 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2265 err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
2266 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2270 return hci_write_sc_support_sync(hdev, 0x01);
2273 int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul)
2275 struct hci_cp_write_le_host_supported cp;
2277 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) ||
2278 !lmp_bredr_capable(hdev))
2281 /* Check first if we already have the right host state
2282 * (host features set)
2284 if (le == lmp_host_le_capable(hdev) &&
2285 simul == lmp_host_le_br_capable(hdev))
2288 memset(&cp, 0, sizeof(cp));
2293 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
2294 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2297 static int hci_powered_update_adv_sync(struct hci_dev *hdev)
2299 struct adv_info *adv, *tmp;
2302 if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
2305 /* If RPA Resolution has not been enable yet it means the
2306 * resolving list is empty and we should attempt to program the
2307 * local IRK in order to support using own_addr_type
2308 * ADDR_LE_DEV_RANDOM_RESOLVED (0x03).
2310 if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
2311 hci_le_add_resolve_list_sync(hdev, NULL);
2312 hci_le_set_addr_resolution_enable_sync(hdev, 0x01);
2315 /* Make sure the controller has a good default for
2316 * advertising data. This also applies to the case
2317 * where BR/EDR was toggled during the AUTO_OFF phase.
2319 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
2320 list_empty(&hdev->adv_instances)) {
2321 if (ext_adv_capable(hdev)) {
2322 err = hci_setup_ext_adv_instance_sync(hdev, 0x00);
2324 hci_update_scan_rsp_data_sync(hdev, 0x00);
2326 err = hci_update_adv_data_sync(hdev, 0x00);
2328 hci_update_scan_rsp_data_sync(hdev, 0x00);
2331 if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
2332 hci_enable_advertising_sync(hdev);
2335 /* Call for each tracked instance to be scheduled */
2336 list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list)
2337 hci_schedule_adv_instance_sync(hdev, adv->instance, true);
2342 static int hci_write_auth_enable_sync(struct hci_dev *hdev)
2346 link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY);
2347 if (link_sec == test_bit(HCI_AUTH, &hdev->flags))
2350 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
2351 sizeof(link_sec), &link_sec,
2355 int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable)
2357 struct hci_cp_write_page_scan_activity cp;
2361 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
2364 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
2367 memset(&cp, 0, sizeof(cp));
2370 type = PAGE_SCAN_TYPE_INTERLACED;
2372 /* 160 msec page scan interval */
2373 cp.interval = cpu_to_le16(0x0100);
2375 type = hdev->def_page_scan_type;
2376 cp.interval = cpu_to_le16(hdev->def_page_scan_int);
2379 cp.window = cpu_to_le16(hdev->def_page_scan_window);
2381 if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval ||
2382 __cpu_to_le16(hdev->page_scan_window) != cp.window) {
2383 err = __hci_cmd_sync_status(hdev,
2384 HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
2385 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2390 if (hdev->page_scan_type != type)
2391 err = __hci_cmd_sync_status(hdev,
2392 HCI_OP_WRITE_PAGE_SCAN_TYPE,
2393 sizeof(type), &type,
2399 static bool disconnected_accept_list_entries(struct hci_dev *hdev)
2401 struct bdaddr_list *b;
2403 list_for_each_entry(b, &hdev->accept_list, list) {
2404 struct hci_conn *conn;
2406 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
2410 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2417 static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val)
2419 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
2424 int hci_update_scan_sync(struct hci_dev *hdev)
2428 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
2431 if (!hdev_is_powered(hdev))
2434 if (mgmt_powering_down(hdev))
2437 if (hdev->scanning_paused)
2440 if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
2441 disconnected_accept_list_entries(hdev))
2444 scan = SCAN_DISABLED;
2446 if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
2447 scan |= SCAN_INQUIRY;
2449 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) &&
2450 test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY))
2453 return hci_write_scan_enable_sync(hdev, scan);
2456 int hci_update_name_sync(struct hci_dev *hdev)
2458 struct hci_cp_write_local_name cp;
2460 memset(&cp, 0, sizeof(cp));
2462 memcpy(cp.name, hdev->dev_name, sizeof(cp.name));
2464 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME,
2469 /* This function perform powered update HCI command sequence after the HCI init
2470 * sequence which end up resetting all states, the sequence is as follows:
2472 * HCI_SSP_ENABLED(Enable SSP)
2473 * HCI_LE_ENABLED(Enable LE)
2474 * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) ->
2476 * Enable Authentication
2477 * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class ->
2478 * Set Name -> Set EIR)
2480 int hci_powered_update_sync(struct hci_dev *hdev)
2484 /* Register the available SMP channels (BR/EDR and LE) only when
2485 * successfully powering on the controller. This late
2486 * registration is required so that LE SMP can clearly decide if
2487 * the public address or static address is used.
2491 err = hci_write_ssp_mode_sync(hdev, 0x01);
2495 err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00);
2499 err = hci_powered_update_adv_sync(hdev);
2503 err = hci_write_auth_enable_sync(hdev);
2507 if (lmp_bredr_capable(hdev)) {
2508 if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
2509 hci_write_fast_connectable_sync(hdev, true);
2511 hci_write_fast_connectable_sync(hdev, false);
2512 hci_update_scan_sync(hdev);
2513 hci_update_class_sync(hdev);
2514 hci_update_name_sync(hdev);
2515 hci_update_eir_sync(hdev);
2522 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
2523 * (BD_ADDR) for a HCI device from
2524 * a firmware node property.
2525 * @hdev: The HCI device
2527 * Search the firmware node for 'local-bd-address'.
2529 * All-zero BD addresses are rejected, because those could be properties
2530 * that exist in the firmware tables, but were not updated by the firmware. For
2531 * example, the DTS could define 'local-bd-address', with zero BD addresses.
2533 static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
2535 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
2539 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
2540 (u8 *)&ba, sizeof(ba));
2541 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
2544 bacpy(&hdev->public_addr, &ba);
2547 struct hci_init_stage {
2548 int (*func)(struct hci_dev *hdev);
2551 /* Run init stage NULL terminated function table */
2552 static int hci_init_stage_sync(struct hci_dev *hdev,
2553 const struct hci_init_stage *stage)
2557 for (i = 0; stage[i].func; i++) {
2560 err = stage[i].func(hdev);
2568 /* Read Local Version */
2569 static int hci_read_local_version_sync(struct hci_dev *hdev)
2571 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION,
2572 0, NULL, HCI_CMD_TIMEOUT);
2575 /* Read BD Address */
2576 static int hci_read_bd_addr_sync(struct hci_dev *hdev)
2578 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR,
2579 0, NULL, HCI_CMD_TIMEOUT);
2582 #define HCI_INIT(_func) \
2587 static const struct hci_init_stage hci_init0[] = {
2588 /* HCI_OP_READ_LOCAL_VERSION */
2589 HCI_INIT(hci_read_local_version_sync),
2590 /* HCI_OP_READ_BD_ADDR */
2591 HCI_INIT(hci_read_bd_addr_sync),
2595 int hci_reset_sync(struct hci_dev *hdev)
2599 set_bit(HCI_RESET, &hdev->flags);
2601 err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL,
2609 static int hci_init0_sync(struct hci_dev *hdev)
2613 bt_dev_dbg(hdev, "");
2616 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
2617 err = hci_reset_sync(hdev);
2622 return hci_init_stage_sync(hdev, hci_init0);
2625 static int hci_unconf_init_sync(struct hci_dev *hdev)
2629 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2632 err = hci_init0_sync(hdev);
2636 if (hci_dev_test_flag(hdev, HCI_SETUP))
2637 hci_debugfs_create_basic(hdev);
2642 /* Read Local Supported Features. */
2643 static int hci_read_local_features_sync(struct hci_dev *hdev)
2645 /* Not all AMP controllers support this command */
2646 if (hdev->dev_type == HCI_AMP && !(hdev->commands[14] & 0x20))
2649 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES,
2650 0, NULL, HCI_CMD_TIMEOUT);
2653 /* BR Controller init stage 1 command sequence */
2654 static const struct hci_init_stage br_init1[] = {
2655 /* HCI_OP_READ_LOCAL_FEATURES */
2656 HCI_INIT(hci_read_local_features_sync),
2657 /* HCI_OP_READ_LOCAL_VERSION */
2658 HCI_INIT(hci_read_local_version_sync),
2659 /* HCI_OP_READ_BD_ADDR */
2660 HCI_INIT(hci_read_bd_addr_sync),
2664 /* Read Local Commands */
2665 static int hci_read_local_cmds_sync(struct hci_dev *hdev)
2667 /* All Bluetooth 1.2 and later controllers should support the
2668 * HCI command for reading the local supported commands.
2670 * Unfortunately some controllers indicate Bluetooth 1.2 support,
2671 * but do not have support for this command. If that is the case,
2672 * the driver can quirk the behavior and skip reading the local
2673 * supported commands.
2675 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
2676 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
2677 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS,
2678 0, NULL, HCI_CMD_TIMEOUT);
2683 /* Read Local AMP Info */
2684 static int hci_read_local_amp_info_sync(struct hci_dev *hdev)
2686 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_AMP_INFO,
2687 0, NULL, HCI_CMD_TIMEOUT);
2690 /* Read Data Blk size */
2691 static int hci_read_data_block_size_sync(struct hci_dev *hdev)
2693 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DATA_BLOCK_SIZE,
2694 0, NULL, HCI_CMD_TIMEOUT);
2697 /* Read Flow Control Mode */
2698 static int hci_read_flow_control_mode_sync(struct hci_dev *hdev)
2700 return __hci_cmd_sync_status(hdev, HCI_OP_READ_FLOW_CONTROL_MODE,
2701 0, NULL, HCI_CMD_TIMEOUT);
2704 /* Read Location Data */
2705 static int hci_read_location_data_sync(struct hci_dev *hdev)
2707 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCATION_DATA,
2708 0, NULL, HCI_CMD_TIMEOUT);
2711 /* AMP Controller init stage 1 command sequence */
2712 static const struct hci_init_stage amp_init1[] = {
2713 /* HCI_OP_READ_LOCAL_VERSION */
2714 HCI_INIT(hci_read_local_version_sync),
2715 /* HCI_OP_READ_LOCAL_COMMANDS */
2716 HCI_INIT(hci_read_local_cmds_sync),
2717 /* HCI_OP_READ_LOCAL_AMP_INFO */
2718 HCI_INIT(hci_read_local_amp_info_sync),
2719 /* HCI_OP_READ_DATA_BLOCK_SIZE */
2720 HCI_INIT(hci_read_data_block_size_sync),
2721 /* HCI_OP_READ_FLOW_CONTROL_MODE */
2722 HCI_INIT(hci_read_flow_control_mode_sync),
2723 /* HCI_OP_READ_LOCATION_DATA */
2724 HCI_INIT(hci_read_location_data_sync),
2727 static int hci_init1_sync(struct hci_dev *hdev)
2731 bt_dev_dbg(hdev, "");
2734 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
2735 err = hci_reset_sync(hdev);
2740 switch (hdev->dev_type) {
2742 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2743 return hci_init_stage_sync(hdev, br_init1);
2745 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2746 return hci_init_stage_sync(hdev, amp_init1);
2748 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
2755 /* AMP Controller init stage 2 command sequence */
2756 static const struct hci_init_stage amp_init2[] = {
2757 /* HCI_OP_READ_LOCAL_FEATURES */
2758 HCI_INIT(hci_read_local_features_sync),
2761 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
2762 static int hci_read_buffer_size_sync(struct hci_dev *hdev)
2764 return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE,
2765 0, NULL, HCI_CMD_TIMEOUT);
2768 /* Read Class of Device */
2769 static int hci_read_dev_class_sync(struct hci_dev *hdev)
2771 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV,
2772 0, NULL, HCI_CMD_TIMEOUT);
2775 /* Read Local Name */
2776 static int hci_read_local_name_sync(struct hci_dev *hdev)
2778 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME,
2779 0, NULL, HCI_CMD_TIMEOUT);
2782 /* Read Voice Setting */
2783 static int hci_read_voice_setting_sync(struct hci_dev *hdev)
2785 return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING,
2786 0, NULL, HCI_CMD_TIMEOUT);
2789 /* Read Number of Supported IAC */
2790 static int hci_read_num_supported_iac_sync(struct hci_dev *hdev)
2792 return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC,
2793 0, NULL, HCI_CMD_TIMEOUT);
2796 /* Read Current IAC LAP */
2797 static int hci_read_current_iac_lap_sync(struct hci_dev *hdev)
2799 return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP,
2800 0, NULL, HCI_CMD_TIMEOUT);
2803 static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
2804 u8 cond_type, bdaddr_t *bdaddr,
2807 struct hci_cp_set_event_filter cp;
2809 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
2812 memset(&cp, 0, sizeof(cp));
2813 cp.flt_type = flt_type;
2815 if (flt_type != HCI_FLT_CLEAR_ALL) {
2816 cp.cond_type = cond_type;
2817 bacpy(&cp.addr_conn_flt.bdaddr, bdaddr);
2818 cp.addr_conn_flt.auto_accept = auto_accept;
2821 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT,
2822 flt_type == HCI_FLT_CLEAR_ALL ?
2823 sizeof(cp.flt_type) : sizeof(cp), &cp,
2827 static int hci_clear_event_filter_sync(struct hci_dev *hdev)
2829 if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
2832 return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
2836 /* Connection accept timeout ~20 secs */
2837 static int hci_write_ca_timeout_sync(struct hci_dev *hdev)
2839 __le16 param = cpu_to_le16(0x7d00);
2841 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT,
2842 sizeof(param), ¶m, HCI_CMD_TIMEOUT);
2845 /* BR Controller init stage 2 command sequence */
2846 static const struct hci_init_stage br_init2[] = {
2847 /* HCI_OP_READ_BUFFER_SIZE */
2848 HCI_INIT(hci_read_buffer_size_sync),
2849 /* HCI_OP_READ_CLASS_OF_DEV */
2850 HCI_INIT(hci_read_dev_class_sync),
2851 /* HCI_OP_READ_LOCAL_NAME */
2852 HCI_INIT(hci_read_local_name_sync),
2853 /* HCI_OP_READ_VOICE_SETTING */
2854 HCI_INIT(hci_read_voice_setting_sync),
2855 /* HCI_OP_READ_NUM_SUPPORTED_IAC */
2856 HCI_INIT(hci_read_num_supported_iac_sync),
2857 /* HCI_OP_READ_CURRENT_IAC_LAP */
2858 HCI_INIT(hci_read_current_iac_lap_sync),
2859 /* HCI_OP_SET_EVENT_FLT */
2860 HCI_INIT(hci_clear_event_filter_sync),
2861 /* HCI_OP_WRITE_CA_TIMEOUT */
2862 HCI_INIT(hci_write_ca_timeout_sync),
2866 static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev)
2870 if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
2873 /* When SSP is available, then the host features page
2874 * should also be available as well. However some
2875 * controllers list the max_page as 0 as long as SSP
2876 * has not been enabled. To achieve proper debugging
2877 * output, force the minimum max_page to 1 at least.
2879 hdev->max_page = 0x01;
2881 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE,
2882 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2885 static int hci_write_eir_sync(struct hci_dev *hdev)
2887 struct hci_cp_write_eir cp;
2889 if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
2892 memset(hdev->eir, 0, sizeof(hdev->eir));
2893 memset(&cp, 0, sizeof(cp));
2895 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp,
2899 static int hci_write_inquiry_mode_sync(struct hci_dev *hdev)
2903 if (!lmp_inq_rssi_capable(hdev) &&
2904 !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
2907 /* If Extended Inquiry Result events are supported, then
2908 * they are clearly preferred over Inquiry Result with RSSI
2911 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
2913 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE,
2914 sizeof(mode), &mode, HCI_CMD_TIMEOUT);
2917 static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev)
2919 if (!lmp_inq_tx_pwr_capable(hdev))
2922 return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER,
2923 0, NULL, HCI_CMD_TIMEOUT);
2926 static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page)
2928 struct hci_cp_read_local_ext_features cp;
2930 if (!lmp_ext_feat_capable(hdev))
2933 memset(&cp, 0, sizeof(cp));
2936 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES,
2937 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
2940 static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev)
2942 return hci_read_local_ext_features_sync(hdev, 0x01);
2945 /* HCI Controller init stage 2 command sequence */
2946 static const struct hci_init_stage hci_init2[] = {
2947 /* HCI_OP_READ_LOCAL_COMMANDS */
2948 HCI_INIT(hci_read_local_cmds_sync),
2949 /* HCI_OP_WRITE_SSP_MODE */
2950 HCI_INIT(hci_write_ssp_mode_1_sync),
2951 /* HCI_OP_WRITE_EIR */
2952 HCI_INIT(hci_write_eir_sync),
2953 /* HCI_OP_WRITE_INQUIRY_MODE */
2954 HCI_INIT(hci_write_inquiry_mode_sync),
2955 /* HCI_OP_READ_INQ_RSP_TX_POWER */
2956 HCI_INIT(hci_read_inq_rsp_tx_power_sync),
2957 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
2958 HCI_INIT(hci_read_local_ext_features_1_sync),
2959 /* HCI_OP_WRITE_AUTH_ENABLE */
2960 HCI_INIT(hci_write_auth_enable_sync),
2964 /* Read LE Buffer Size */
2965 static int hci_le_read_buffer_size_sync(struct hci_dev *hdev)
2967 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE,
2968 0, NULL, HCI_CMD_TIMEOUT);
2971 /* Read LE Local Supported Features */
2972 static int hci_le_read_local_features_sync(struct hci_dev *hdev)
2974 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES,
2975 0, NULL, HCI_CMD_TIMEOUT);
2978 /* Read LE Supported States */
2979 static int hci_le_read_supported_states_sync(struct hci_dev *hdev)
2981 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES,
2982 0, NULL, HCI_CMD_TIMEOUT);
2985 /* LE Controller init stage 2 command sequence */
2986 static const struct hci_init_stage le_init2[] = {
2987 /* HCI_OP_LE_READ_BUFFER_SIZE */
2988 HCI_INIT(hci_le_read_buffer_size_sync),
2989 /* HCI_OP_LE_READ_LOCAL_FEATURES */
2990 HCI_INIT(hci_le_read_local_features_sync),
2991 /* HCI_OP_LE_READ_SUPPORTED_STATES */
2992 HCI_INIT(hci_le_read_supported_states_sync),
2996 static int hci_init2_sync(struct hci_dev *hdev)
3000 bt_dev_dbg(hdev, "");
3002 if (hdev->dev_type == HCI_AMP)
3003 return hci_init_stage_sync(hdev, amp_init2);
3005 if (lmp_bredr_capable(hdev)) {
3006 err = hci_init_stage_sync(hdev, br_init2);
3010 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
3013 if (lmp_le_capable(hdev)) {
3014 err = hci_init_stage_sync(hdev, le_init2);
3017 /* LE-only controllers have LE implicitly enabled */
3018 if (!lmp_bredr_capable(hdev))
3019 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
3022 return hci_init_stage_sync(hdev, hci_init2);
3025 static int hci_set_event_mask_sync(struct hci_dev *hdev)
3027 /* The second byte is 0xff instead of 0x9f (two reserved bits
3028 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
3029 * command otherwise.
3031 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
3033 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
3034 * any event mask for pre 1.2 devices.
3036 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
3039 if (lmp_bredr_capable(hdev)) {
3040 events[4] |= 0x01; /* Flow Specification Complete */
3042 /* Don't set Disconnect Complete when suspended as that
3043 * would wakeup the host when disconnecting due to
3046 if (hdev->suspended)
3049 /* Use a different default for LE-only devices */
3050 memset(events, 0, sizeof(events));
3051 events[1] |= 0x20; /* Command Complete */
3052 events[1] |= 0x40; /* Command Status */
3053 events[1] |= 0x80; /* Hardware Error */
3055 /* If the controller supports the Disconnect command, enable
3056 * the corresponding event. In addition enable packet flow
3057 * control related events.
3059 if (hdev->commands[0] & 0x20) {
3060 /* Don't set Disconnect Complete when suspended as that
3061 * would wakeup the host when disconnecting due to
3064 if (!hdev->suspended)
3065 events[0] |= 0x10; /* Disconnection Complete */
3066 events[2] |= 0x04; /* Number of Completed Packets */
3067 events[3] |= 0x02; /* Data Buffer Overflow */
3070 /* If the controller supports the Read Remote Version
3071 * Information command, enable the corresponding event.
3073 if (hdev->commands[2] & 0x80)
3074 events[1] |= 0x08; /* Read Remote Version Information
3078 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
3079 events[0] |= 0x80; /* Encryption Change */
3080 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3084 if (lmp_inq_rssi_capable(hdev) ||
3085 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
3086 events[4] |= 0x02; /* Inquiry Result with RSSI */
3088 if (lmp_ext_feat_capable(hdev))
3089 events[4] |= 0x04; /* Read Remote Extended Features Complete */
3091 if (lmp_esco_capable(hdev)) {
3092 events[5] |= 0x08; /* Synchronous Connection Complete */
3093 events[5] |= 0x10; /* Synchronous Connection Changed */
3096 if (lmp_sniffsubr_capable(hdev))
3097 events[5] |= 0x20; /* Sniff Subrating */
3099 if (lmp_pause_enc_capable(hdev))
3100 events[5] |= 0x80; /* Encryption Key Refresh Complete */
3102 if (lmp_ext_inq_capable(hdev))
3103 events[5] |= 0x40; /* Extended Inquiry Result */
3105 if (lmp_no_flush_capable(hdev))
3106 events[7] |= 0x01; /* Enhanced Flush Complete */
3108 if (lmp_lsto_capable(hdev))
3109 events[6] |= 0x80; /* Link Supervision Timeout Changed */
3111 if (lmp_ssp_capable(hdev)) {
3112 events[6] |= 0x01; /* IO Capability Request */
3113 events[6] |= 0x02; /* IO Capability Response */
3114 events[6] |= 0x04; /* User Confirmation Request */
3115 events[6] |= 0x08; /* User Passkey Request */
3116 events[6] |= 0x10; /* Remote OOB Data Request */
3117 events[6] |= 0x20; /* Simple Pairing Complete */
3118 events[7] |= 0x04; /* User Passkey Notification */
3119 events[7] |= 0x08; /* Keypress Notification */
3120 events[7] |= 0x10; /* Remote Host Supported
3121 * Features Notification
3125 if (lmp_le_capable(hdev))
3126 events[7] |= 0x20; /* LE Meta-Event */
3128 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK,
3129 sizeof(events), events, HCI_CMD_TIMEOUT);
3132 static int hci_read_stored_link_key_sync(struct hci_dev *hdev)
3134 struct hci_cp_read_stored_link_key cp;
3136 if (!(hdev->commands[6] & 0x20) ||
3137 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
3140 memset(&cp, 0, sizeof(cp));
3141 bacpy(&cp.bdaddr, BDADDR_ANY);
3144 return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY,
3145 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3148 static int hci_setup_link_policy_sync(struct hci_dev *hdev)
3150 struct hci_cp_write_def_link_policy cp;
3151 u16 link_policy = 0;
3153 if (!(hdev->commands[5] & 0x10))
3156 memset(&cp, 0, sizeof(cp));
3158 if (lmp_rswitch_capable(hdev))
3159 link_policy |= HCI_LP_RSWITCH;
3160 if (lmp_hold_capable(hdev))
3161 link_policy |= HCI_LP_HOLD;
3162 if (lmp_sniff_capable(hdev))
3163 link_policy |= HCI_LP_SNIFF;
3164 if (lmp_park_capable(hdev))
3165 link_policy |= HCI_LP_PARK;
3167 cp.policy = cpu_to_le16(link_policy);
3169 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
3170 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3173 static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
3175 if (!(hdev->commands[8] & 0x01))
3178 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY,
3179 0, NULL, HCI_CMD_TIMEOUT);
3182 static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
3184 if (!(hdev->commands[18] & 0x04) ||
3185 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
3188 return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
3189 0, NULL, HCI_CMD_TIMEOUT);
3192 static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
3194 /* Some older Broadcom based Bluetooth 1.2 controllers do not
3195 * support the Read Page Scan Type command. Check support for
3196 * this command in the bit mask of supported commands.
3198 if (!(hdev->commands[13] & 0x01))
3201 return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
3202 0, NULL, HCI_CMD_TIMEOUT);
3205 /* Read features beyond page 1 if available */
3206 static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev)
3211 if (!lmp_ext_feat_capable(hdev))
3214 for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page;
3216 err = hci_read_local_ext_features_sync(hdev, page);
3224 /* HCI Controller init stage 3 command sequence */
3225 static const struct hci_init_stage hci_init3[] = {
3226 /* HCI_OP_SET_EVENT_MASK */
3227 HCI_INIT(hci_set_event_mask_sync),
3228 /* HCI_OP_READ_STORED_LINK_KEY */
3229 HCI_INIT(hci_read_stored_link_key_sync),
3230 /* HCI_OP_WRITE_DEF_LINK_POLICY */
3231 HCI_INIT(hci_setup_link_policy_sync),
3232 /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */
3233 HCI_INIT(hci_read_page_scan_activity_sync),
3234 /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */
3235 HCI_INIT(hci_read_def_err_data_reporting_sync),
3236 /* HCI_OP_READ_PAGE_SCAN_TYPE */
3237 HCI_INIT(hci_read_page_scan_type_sync),
3238 /* HCI_OP_READ_LOCAL_EXT_FEATURES */
3239 HCI_INIT(hci_read_local_ext_features_all_sync),
3243 static int hci_le_set_event_mask_sync(struct hci_dev *hdev)
3247 if (!lmp_le_capable(hdev))
3250 memset(events, 0, sizeof(events));
3252 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
3253 events[0] |= 0x10; /* LE Long Term Key Request */
3255 /* If controller supports the Connection Parameters Request
3256 * Link Layer Procedure, enable the corresponding event.
3258 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
3259 /* LE Remote Connection Parameter Request */
3262 /* If the controller supports the Data Length Extension
3263 * feature, enable the corresponding event.
3265 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
3266 events[0] |= 0x40; /* LE Data Length Change */
3268 /* If the controller supports LL Privacy feature or LE Extended Adv,
3269 * enable the corresponding event.
3271 if (use_enhanced_conn_complete(hdev))
3272 events[1] |= 0x02; /* LE Enhanced Connection Complete */
3274 /* If the controller supports Extended Scanner Filter
3275 * Policies, enable the corresponding event.
3277 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
3278 events[1] |= 0x04; /* LE Direct Advertising Report */
3280 /* If the controller supports Channel Selection Algorithm #2
3281 * feature, enable the corresponding event.
3283 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
3284 events[2] |= 0x08; /* LE Channel Selection Algorithm */
3286 /* If the controller supports the LE Set Scan Enable command,
3287 * enable the corresponding advertising report event.
3289 if (hdev->commands[26] & 0x08)
3290 events[0] |= 0x02; /* LE Advertising Report */
3292 /* If the controller supports the LE Create Connection
3293 * command, enable the corresponding event.
3295 if (hdev->commands[26] & 0x10)
3296 events[0] |= 0x01; /* LE Connection Complete */
3298 /* If the controller supports the LE Connection Update
3299 * command, enable the corresponding event.
3301 if (hdev->commands[27] & 0x04)
3302 events[0] |= 0x04; /* LE Connection Update Complete */
3304 /* If the controller supports the LE Read Remote Used Features
3305 * command, enable the corresponding event.
3307 if (hdev->commands[27] & 0x20)
3308 /* LE Read Remote Used Features Complete */
3311 /* If the controller supports the LE Read Local P-256
3312 * Public Key command, enable the corresponding event.
3314 if (hdev->commands[34] & 0x02)
3315 /* LE Read Local P-256 Public Key Complete */
3318 /* If the controller supports the LE Generate DHKey
3319 * command, enable the corresponding event.
3321 if (hdev->commands[34] & 0x04)
3322 events[1] |= 0x01; /* LE Generate DHKey Complete */
3324 /* If the controller supports the LE Set Default PHY or
3325 * LE Set PHY commands, enable the corresponding event.
3327 if (hdev->commands[35] & (0x20 | 0x40))
3328 events[1] |= 0x08; /* LE PHY Update Complete */
3330 /* If the controller supports LE Set Extended Scan Parameters
3331 * and LE Set Extended Scan Enable commands, enable the
3332 * corresponding event.
3334 if (use_ext_scan(hdev))
3335 events[1] |= 0x10; /* LE Extended Advertising Report */
3337 /* If the controller supports the LE Extended Advertising
3338 * command, enable the corresponding event.
3340 if (ext_adv_capable(hdev))
3341 events[2] |= 0x02; /* LE Advertising Set Terminated */
3343 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK,
3344 sizeof(events), events, HCI_CMD_TIMEOUT);
3347 /* Read LE Advertising Channel TX Power */
3348 static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
3350 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
3351 /* HCI TS spec forbids mixing of legacy and extended
3352 * advertising commands wherein READ_ADV_TX_POWER is
3353 * also included. So do not call it if extended adv
3354 * is supported otherwise controller will return
3355 * COMMAND_DISALLOWED for extended commands.
3357 return __hci_cmd_sync_status(hdev,
3358 HCI_OP_LE_READ_ADV_TX_POWER,
3359 0, NULL, HCI_CMD_TIMEOUT);
3365 /* Read LE Min/Max Tx Power*/
3366 static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
3368 if (!(hdev->commands[38] & 0x80) ||
3369 test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
3372 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,
3373 0, NULL, HCI_CMD_TIMEOUT);
3376 /* Read LE Accept List Size */
3377 static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev)
3379 if (!(hdev->commands[26] & 0x40))
3382 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
3383 0, NULL, HCI_CMD_TIMEOUT);
3386 /* Clear LE Accept List */
3387 static int hci_le_clear_accept_list_sync(struct hci_dev *hdev)
3389 if (!(hdev->commands[26] & 0x80))
3392 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL,
3396 /* Read LE Resolving List Size */
3397 static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev)
3399 if (!(hdev->commands[34] & 0x40))
3402 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
3403 0, NULL, HCI_CMD_TIMEOUT);
3406 /* Clear LE Resolving List */
3407 static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev)
3409 if (!(hdev->commands[34] & 0x20))
3412 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL,
3416 /* Set RPA timeout */
3417 static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev)
3419 __le16 timeout = cpu_to_le16(hdev->rpa_timeout);
3421 if (!(hdev->commands[35] & 0x04))
3424 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT,
3425 sizeof(timeout), &timeout,
3429 /* Read LE Maximum Data Length */
3430 static int hci_le_read_max_data_len_sync(struct hci_dev *hdev)
3432 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
3435 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL,
3439 /* Read LE Suggested Default Data Length */
3440 static int hci_le_read_def_data_len_sync(struct hci_dev *hdev)
3442 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
3445 return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL,
3449 /* Read LE Number of Supported Advertising Sets */
3450 static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev)
3452 if (!ext_adv_capable(hdev))
3455 return __hci_cmd_sync_status(hdev,
3456 HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
3457 0, NULL, HCI_CMD_TIMEOUT);
3460 /* Write LE Host Supported */
3461 static int hci_set_le_support_sync(struct hci_dev *hdev)
3463 struct hci_cp_write_le_host_supported cp;
3465 /* LE-only devices do not support explicit enablement */
3466 if (!lmp_bredr_capable(hdev))
3469 memset(&cp, 0, sizeof(cp));
3471 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
3476 if (cp.le == lmp_host_le_capable(hdev))
3479 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED,
3480 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3483 /* LE Controller init stage 3 command sequence */
3484 static const struct hci_init_stage le_init3[] = {
3485 /* HCI_OP_LE_SET_EVENT_MASK */
3486 HCI_INIT(hci_le_set_event_mask_sync),
3487 /* HCI_OP_LE_READ_ADV_TX_POWER */
3488 HCI_INIT(hci_le_read_adv_tx_power_sync),
3489 /* HCI_OP_LE_READ_TRANSMIT_POWER */
3490 HCI_INIT(hci_le_read_tx_power_sync),
3491 /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */
3492 HCI_INIT(hci_le_read_accept_list_size_sync),
3493 /* HCI_OP_LE_CLEAR_ACCEPT_LIST */
3494 HCI_INIT(hci_le_clear_accept_list_sync),
3495 /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */
3496 HCI_INIT(hci_le_read_resolv_list_size_sync),
3497 /* HCI_OP_LE_CLEAR_RESOLV_LIST */
3498 HCI_INIT(hci_le_clear_resolv_list_sync),
3499 /* HCI_OP_LE_SET_RPA_TIMEOUT */
3500 HCI_INIT(hci_le_set_rpa_timeout_sync),
3501 /* HCI_OP_LE_READ_MAX_DATA_LEN */
3502 HCI_INIT(hci_le_read_max_data_len_sync),
3503 /* HCI_OP_LE_READ_DEF_DATA_LEN */
3504 HCI_INIT(hci_le_read_def_data_len_sync),
3505 /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */
3506 HCI_INIT(hci_le_read_num_support_adv_sets_sync),
3507 /* HCI_OP_WRITE_LE_HOST_SUPPORTED */
3508 HCI_INIT(hci_set_le_support_sync),
3512 static int hci_init3_sync(struct hci_dev *hdev)
3516 bt_dev_dbg(hdev, "");
3518 err = hci_init_stage_sync(hdev, hci_init3);
3522 if (lmp_le_capable(hdev))
3523 return hci_init_stage_sync(hdev, le_init3);
3528 static int hci_delete_stored_link_key_sync(struct hci_dev *hdev)
3530 struct hci_cp_delete_stored_link_key cp;
3532 /* Some Broadcom based Bluetooth controllers do not support the
3533 * Delete Stored Link Key command. They are clearly indicating its
3534 * absence in the bit mask of supported commands.
3536 * Check the supported commands and only if the command is marked
3537 * as supported send it. If not supported assume that the controller
3538 * does not have actual support for stored link keys which makes this
3539 * command redundant anyway.
3541 * Some controllers indicate that they support handling deleting
3542 * stored link keys, but they don't. The quirk lets a driver
3543 * just disable this command.
3545 if (!(hdev->commands[6] & 0x80) ||
3546 test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks))
3549 memset(&cp, 0, sizeof(cp));
3550 bacpy(&cp.bdaddr, BDADDR_ANY);
3551 cp.delete_all = 0x01;
3553 return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY,
3554 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3557 static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev)
3559 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
3560 bool changed = false;
3562 /* Set event mask page 2 if the HCI command for it is supported */
3563 if (!(hdev->commands[22] & 0x04))
3566 /* If Connectionless Peripheral Broadcast central role is supported
3567 * enable all necessary events for it.
3569 if (lmp_cpb_central_capable(hdev)) {
3570 events[1] |= 0x40; /* Triggered Clock Capture */
3571 events[1] |= 0x80; /* Synchronization Train Complete */
3572 events[2] |= 0x10; /* Peripheral Page Response Timeout */
3573 events[2] |= 0x20; /* CPB Channel Map Change */
3577 /* If Connectionless Peripheral Broadcast peripheral role is supported
3578 * enable all necessary events for it.
3580 if (lmp_cpb_peripheral_capable(hdev)) {
3581 events[2] |= 0x01; /* Synchronization Train Received */
3582 events[2] |= 0x02; /* CPB Receive */
3583 events[2] |= 0x04; /* CPB Timeout */
3584 events[2] |= 0x08; /* Truncated Page Complete */
3588 /* Enable Authenticated Payload Timeout Expired event if supported */
3589 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
3594 /* Some Broadcom based controllers indicate support for Set Event
3595 * Mask Page 2 command, but then actually do not support it. Since
3596 * the default value is all bits set to zero, the command is only
3597 * required if the event mask has to be changed. In case no change
3598 * to the event mask is needed, skip this command.
3603 return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2,
3604 sizeof(events), events, HCI_CMD_TIMEOUT);
3607 /* Read local codec list if the HCI command is supported */
3608 static int hci_read_local_codecs_sync(struct hci_dev *hdev)
3610 if (!(hdev->commands[29] & 0x20))
3613 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_CODECS, 0, NULL,
3617 /* Read local pairing options if the HCI command is supported */
3618 static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev)
3620 if (!(hdev->commands[41] & 0x08))
3623 return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS,
3624 0, NULL, HCI_CMD_TIMEOUT);
3627 /* Get MWS transport configuration if the HCI command is supported */
3628 static int hci_get_mws_transport_config_sync(struct hci_dev *hdev)
3630 if (!(hdev->commands[30] & 0x08))
3633 return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG,
3634 0, NULL, HCI_CMD_TIMEOUT);
3637 /* Check for Synchronization Train support */
3638 static int hci_read_sync_train_params_sync(struct hci_dev *hdev)
3640 if (!lmp_sync_train_capable(hdev))
3643 return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS,
3644 0, NULL, HCI_CMD_TIMEOUT);
3647 /* Enable Secure Connections if supported and configured */
3648 static int hci_write_sc_support_1_sync(struct hci_dev *hdev)
3652 if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) ||
3653 !bredr_sc_enabled(hdev))
3656 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT,
3657 sizeof(support), &support,
3661 /* Set erroneous data reporting if supported to the wideband speech
3664 static int hci_set_err_data_report_sync(struct hci_dev *hdev)
3666 struct hci_cp_write_def_err_data_reporting cp;
3667 bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
3669 if (!(hdev->commands[18] & 0x08) ||
3670 test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
3673 if (enabled == hdev->err_data_reporting)
3676 memset(&cp, 0, sizeof(cp));
3677 cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED :
3678 ERR_DATA_REPORTING_DISABLED;
3680 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
3681 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3684 static const struct hci_init_stage hci_init4[] = {
3685 /* HCI_OP_DELETE_STORED_LINK_KEY */
3686 HCI_INIT(hci_delete_stored_link_key_sync),
3687 /* HCI_OP_SET_EVENT_MASK_PAGE_2 */
3688 HCI_INIT(hci_set_event_mask_page_2_sync),
3689 /* HCI_OP_READ_LOCAL_CODECS */
3690 HCI_INIT(hci_read_local_codecs_sync),
3691 /* HCI_OP_READ_LOCAL_PAIRING_OPTS */
3692 HCI_INIT(hci_read_local_pairing_opts_sync),
3693 /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */
3694 HCI_INIT(hci_get_mws_transport_config_sync),
3695 /* HCI_OP_READ_SYNC_TRAIN_PARAMS */
3696 HCI_INIT(hci_read_sync_train_params_sync),
3697 /* HCI_OP_WRITE_SC_SUPPORT */
3698 HCI_INIT(hci_write_sc_support_1_sync),
3699 /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */
3700 HCI_INIT(hci_set_err_data_report_sync),
3704 /* Set Suggested Default Data Length to maximum if supported */
3705 static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev)
3707 struct hci_cp_le_write_def_data_len cp;
3709 if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT))
3712 memset(&cp, 0, sizeof(cp));
3713 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
3714 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
3716 return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN,
3717 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3720 /* Set Default PHY parameters if command is supported */
3721 static int hci_le_set_default_phy_sync(struct hci_dev *hdev)
3723 struct hci_cp_le_set_default_phy cp;
3725 if (!(hdev->commands[35] & 0x20))
3728 memset(&cp, 0, sizeof(cp));
3730 cp.tx_phys = hdev->le_tx_def_phys;
3731 cp.rx_phys = hdev->le_rx_def_phys;
3733 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY,
3734 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
3737 static const struct hci_init_stage le_init4[] = {
3738 /* HCI_OP_LE_WRITE_DEF_DATA_LEN */
3739 HCI_INIT(hci_le_set_write_def_data_len_sync),
3740 /* HCI_OP_LE_SET_DEFAULT_PHY */
3741 HCI_INIT(hci_le_set_default_phy_sync),
3745 static int hci_init4_sync(struct hci_dev *hdev)
3749 bt_dev_dbg(hdev, "");
3751 err = hci_init_stage_sync(hdev, hci_init4);
3755 if (lmp_le_capable(hdev))
3756 return hci_init_stage_sync(hdev, le_init4);
3761 static int hci_init_sync(struct hci_dev *hdev)
3765 err = hci_init1_sync(hdev);
3769 if (hci_dev_test_flag(hdev, HCI_SETUP))
3770 hci_debugfs_create_basic(hdev);
3772 err = hci_init2_sync(hdev);
3776 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
3777 * BR/EDR/LE type controllers. AMP controllers only need the
3778 * first two stages of init.
3780 if (hdev->dev_type != HCI_PRIMARY)
3783 err = hci_init3_sync(hdev);
3787 err = hci_init4_sync(hdev);
3791 /* This function is only called when the controller is actually in
3792 * configured state. When the controller is marked as unconfigured,
3793 * this initialization procedure is not run.
3795 * It means that it is possible that a controller runs through its
3796 * setup phase and then discovers missing settings. If that is the
3797 * case, then this function will not be called. It then will only
3798 * be called during the config phase.
3800 * So only when in setup phase or config phase, create the debugfs
3801 * entries and register the SMP channels.
3803 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
3804 !hci_dev_test_flag(hdev, HCI_CONFIG))
3807 hci_debugfs_create_common(hdev);
3809 if (lmp_bredr_capable(hdev))
3810 hci_debugfs_create_bredr(hdev);
3812 if (lmp_le_capable(hdev))
3813 hci_debugfs_create_le(hdev);
3818 int hci_dev_open_sync(struct hci_dev *hdev)
3822 bt_dev_dbg(hdev, "");
3824 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
3829 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
3830 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3831 /* Check for rfkill but allow the HCI setup stage to
3832 * proceed (which in itself doesn't cause any RF activity).
3834 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
3839 /* Check for valid public address or a configured static
3840 * random address, but let the HCI setup proceed to
3841 * be able to determine if there is a public address
3844 * In case of user channel usage, it is not important
3845 * if a public address or static random address is
3848 * This check is only valid for BR/EDR controllers
3849 * since AMP controllers do not have an address.
3851 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
3852 hdev->dev_type == HCI_PRIMARY &&
3853 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3854 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
3855 ret = -EADDRNOTAVAIL;
3860 if (test_bit(HCI_UP, &hdev->flags)) {
3865 if (hdev->open(hdev)) {
3870 set_bit(HCI_RUNNING, &hdev->flags);
3871 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
3873 atomic_set(&hdev->cmd_cnt, 1);
3874 set_bit(HCI_INIT, &hdev->flags);
3876 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
3877 test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
3878 bool invalid_bdaddr;
3880 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
3883 ret = hdev->setup(hdev);
3885 /* The transport driver can set the quirk to mark the
3886 * BD_ADDR invalid before creating the HCI device or in
3887 * its setup callback.
3889 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR,
3895 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
3896 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
3897 hci_dev_get_bd_addr_from_property(hdev);
3899 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
3901 ret = hdev->set_bdaddr(hdev,
3902 &hdev->public_addr);
3904 /* If setting of the BD_ADDR from the device
3905 * property succeeds, then treat the address
3906 * as valid even if the invalid BD_ADDR
3907 * quirk indicates otherwise.
3910 invalid_bdaddr = false;
3915 /* The transport driver can set these quirks before
3916 * creating the HCI device or in its setup callback.
3918 * For the invalid BD_ADDR quirk it is possible that
3919 * it becomes a valid address if the bootloader does
3920 * provide it (see above).
3922 * In case any of them is set, the controller has to
3923 * start up as unconfigured.
3925 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
3927 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3929 /* For an unconfigured controller it is required to
3930 * read at least the version information provided by
3931 * the Read Local Version Information command.
3933 * If the set_bdaddr driver callback is provided, then
3934 * also the original Bluetooth public device address
3935 * will be read using the Read BD Address command.
3937 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
3938 ret = hci_unconf_init_sync(hdev);
3941 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
3942 /* If public address change is configured, ensure that
3943 * the address gets programmed. If the driver does not
3944 * support changing the public address, fail the power
3947 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
3949 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
3951 ret = -EADDRNOTAVAIL;
3955 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
3956 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3957 ret = hci_init_sync(hdev);
3958 if (!ret && hdev->post_init)
3959 ret = hdev->post_init(hdev);
3963 /* If the HCI Reset command is clearing all diagnostic settings,
3964 * then they need to be reprogrammed after the init procedure
3967 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
3968 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
3969 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
3970 ret = hdev->set_diag(hdev, true);
3972 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3977 clear_bit(HCI_INIT, &hdev->flags);
3981 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3982 hci_adv_instances_set_rpa_expired(hdev, true);
3983 set_bit(HCI_UP, &hdev->flags);
3984 hci_sock_dev_event(hdev, HCI_DEV_UP);
3985 hci_leds_update_powered(hdev, true);
3986 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
3987 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
3988 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
3989 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
3990 hci_dev_test_flag(hdev, HCI_MGMT) &&
3991 hdev->dev_type == HCI_PRIMARY) {
3992 ret = hci_powered_update_sync(hdev);
3995 /* Init failed, cleanup */
3996 flush_work(&hdev->tx_work);
3998 /* Since hci_rx_work() is possible to awake new cmd_work
3999 * it should be flushed first to avoid unexpected call of
4002 flush_work(&hdev->rx_work);
4003 flush_work(&hdev->cmd_work);
4005 skb_queue_purge(&hdev->cmd_q);
4006 skb_queue_purge(&hdev->rx_q);
4011 if (hdev->sent_cmd) {
4012 kfree_skb(hdev->sent_cmd);
4013 hdev->sent_cmd = NULL;
4016 clear_bit(HCI_RUNNING, &hdev->flags);
4017 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4020 hdev->flags &= BIT(HCI_RAW);
4027 /* This function requires the caller holds hdev->lock */
4028 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
4030 struct hci_conn_params *p;
4032 list_for_each_entry(p, &hdev->le_conn_params, list) {
4034 hci_conn_drop(p->conn);
4035 hci_conn_put(p->conn);
4038 list_del_init(&p->action);
4041 BT_DBG("All LE pending actions cleared");
4044 int hci_dev_close_sync(struct hci_dev *hdev)
4049 bt_dev_dbg(hdev, "");
4051 cancel_delayed_work(&hdev->power_off);
4052 cancel_delayed_work(&hdev->ncmd_timer);
4054 hci_request_cancel_all(hdev);
4056 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
4057 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4058 test_bit(HCI_UP, &hdev->flags)) {
4059 /* Execute vendor specific shutdown routine */
4061 err = hdev->shutdown(hdev);
4064 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
4065 cancel_delayed_work_sync(&hdev->cmd_timer);
4069 hci_leds_update_powered(hdev, false);
4071 /* Flush RX and TX works */
4072 flush_work(&hdev->tx_work);
4073 flush_work(&hdev->rx_work);
4075 if (hdev->discov_timeout > 0) {
4076 hdev->discov_timeout = 0;
4077 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
4078 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
4081 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
4082 cancel_delayed_work(&hdev->service_cache);
4084 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4085 struct adv_info *adv_instance;
4087 cancel_delayed_work_sync(&hdev->rpa_expired);
4089 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
4090 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
4093 /* Avoid potential lockdep warnings from the *_flush() calls by
4094 * ensuring the workqueue is empty up front.
4096 drain_workqueue(hdev->workqueue);
4100 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
4102 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
4104 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
4105 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4106 hci_dev_test_flag(hdev, HCI_MGMT))
4107 __mgmt_power_off(hdev);
4109 hci_inquiry_cache_flush(hdev);
4110 hci_pend_le_actions_clear(hdev);
4111 hci_conn_hash_flush(hdev);
4112 /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */
4113 smp_unregister(hdev);
4114 hci_dev_unlock(hdev);
4116 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
4118 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4119 aosp_do_close(hdev);
4120 msft_do_close(hdev);
4127 skb_queue_purge(&hdev->cmd_q);
4128 atomic_set(&hdev->cmd_cnt, 1);
4129 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
4130 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4131 set_bit(HCI_INIT, &hdev->flags);
4132 hci_reset_sync(hdev);
4133 clear_bit(HCI_INIT, &hdev->flags);
4136 /* flush cmd work */
4137 flush_work(&hdev->cmd_work);
4140 skb_queue_purge(&hdev->rx_q);
4141 skb_queue_purge(&hdev->cmd_q);
4142 skb_queue_purge(&hdev->raw_q);
4144 /* Drop last sent command */
4145 if (hdev->sent_cmd) {
4146 cancel_delayed_work_sync(&hdev->cmd_timer);
4147 kfree_skb(hdev->sent_cmd);
4148 hdev->sent_cmd = NULL;
4151 clear_bit(HCI_RUNNING, &hdev->flags);
4152 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4154 /* After this point our queues are empty and no tasks are scheduled. */
4158 hdev->flags &= BIT(HCI_RAW);
4159 hci_dev_clear_volatile_flags(hdev);
4161 /* Controller radio is available but is currently powered down */
4162 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
4164 memset(hdev->eir, 0, sizeof(hdev->eir));
4165 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
4166 bacpy(&hdev->random_addr, BDADDR_ANY);
4172 /* This function perform power on HCI command sequence as follows:
4174 * If controller is already up (HCI_UP) performs hci_powered_update_sync
4175 * sequence otherwise run hci_dev_open_sync which will follow with
4176 * hci_powered_update_sync after the init sequence is completed.
4178 static int hci_power_on_sync(struct hci_dev *hdev)
4182 if (test_bit(HCI_UP, &hdev->flags) &&
4183 hci_dev_test_flag(hdev, HCI_MGMT) &&
4184 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
4185 cancel_delayed_work(&hdev->power_off);
4186 return hci_powered_update_sync(hdev);
4189 err = hci_dev_open_sync(hdev);
4193 /* During the HCI setup phase, a few error conditions are
4194 * ignored and they need to be checked now. If they are still
4195 * valid, it is important to return the device back off.
4197 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
4198 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
4199 (hdev->dev_type == HCI_PRIMARY &&
4200 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
4201 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
4202 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
4203 hci_dev_close_sync(hdev);
4204 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
4205 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
4206 HCI_AUTO_OFF_TIMEOUT);
4209 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
4210 /* For unconfigured devices, set the HCI_RAW flag
4211 * so that userspace can easily identify them.
4213 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4214 set_bit(HCI_RAW, &hdev->flags);
4216 /* For fully configured devices, this will send
4217 * the Index Added event. For unconfigured devices,
4218 * it will send Unconfigued Index Added event.
4220 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
4221 * and no event will be send.
4223 mgmt_index_added(hdev);
4224 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
4225 /* When the controller is now configured, then it
4226 * is important to clear the HCI_RAW flag.
4228 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4229 clear_bit(HCI_RAW, &hdev->flags);
4231 /* Powering on the controller with HCI_CONFIG set only
4232 * happens with the transition from unconfigured to
4233 * configured. This will send the Index Added event.
4235 mgmt_index_added(hdev);
4241 static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr)
4243 struct hci_cp_remote_name_req_cancel cp;
4245 memset(&cp, 0, sizeof(cp));
4246 bacpy(&cp.bdaddr, addr);
4248 return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL,
4249 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4252 int hci_stop_discovery_sync(struct hci_dev *hdev)
4254 struct discovery_state *d = &hdev->discovery;
4255 struct inquiry_entry *e;
4258 bt_dev_dbg(hdev, "state %u", hdev->discovery.state);
4260 if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) {
4261 if (test_bit(HCI_INQUIRY, &hdev->flags)) {
4262 err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL,
4263 0, NULL, HCI_CMD_TIMEOUT);
4268 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
4269 cancel_delayed_work(&hdev->le_scan_disable);
4270 cancel_delayed_work(&hdev->le_scan_restart);
4272 err = hci_scan_disable_sync(hdev);
4278 err = hci_scan_disable_sync(hdev);
4283 /* Resume advertising if it was paused */
4284 if (use_ll_privacy(hdev))
4285 hci_resume_advertising_sync(hdev);
4287 /* No further actions needed for LE-only discovery */
4288 if (d->type == DISCOV_TYPE_LE)
4291 if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) {
4292 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY,
4297 return hci_remote_name_cancel_sync(hdev, &e->data.bdaddr);
4303 static int hci_disconnect_phy_link_sync(struct hci_dev *hdev, u16 handle,
4306 struct hci_cp_disconn_phy_link cp;
4308 memset(&cp, 0, sizeof(cp));
4309 cp.phy_handle = HCI_PHY_HANDLE(handle);
4312 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONN_PHY_LINK,
4313 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4316 static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn,
4319 struct hci_cp_disconnect cp;
4321 if (conn->type == AMP_LINK)
4322 return hci_disconnect_phy_link_sync(hdev, conn->handle, reason);
4324 memset(&cp, 0, sizeof(cp));
4325 cp.handle = cpu_to_le16(conn->handle);
4328 /* Wait for HCI_EV_DISCONN_COMPLETE not HCI_EV_CMD_STATUS when not
4331 if (!hdev->suspended)
4332 return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT,
4334 HCI_EV_DISCONN_COMPLETE,
4335 HCI_CMD_TIMEOUT, NULL);
4337 return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp,
4341 static int hci_le_connect_cancel_sync(struct hci_dev *hdev,
4342 struct hci_conn *conn)
4344 if (test_bit(HCI_CONN_SCANNING, &conn->flags))
4347 return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL,
4348 6, &conn->dst, HCI_CMD_TIMEOUT);
4351 static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn)
4353 if (conn->type == LE_LINK)
4354 return hci_le_connect_cancel_sync(hdev, conn);
4356 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
4359 return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL,
4360 6, &conn->dst, HCI_CMD_TIMEOUT);
4363 static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn,
4366 struct hci_cp_reject_sync_conn_req cp;
4368 memset(&cp, 0, sizeof(cp));
4369 bacpy(&cp.bdaddr, &conn->dst);
4372 /* SCO rejection has its own limited set of
4373 * allowed error values (0x0D-0x0F).
4375 if (reason < 0x0d || reason > 0x0f)
4376 cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES;
4378 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ,
4379 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4382 static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
4385 struct hci_cp_reject_conn_req cp;
4387 if (conn->type == SCO_LINK || conn->type == ESCO_LINK)
4388 return hci_reject_sco_sync(hdev, conn, reason);
4390 memset(&cp, 0, sizeof(cp));
4391 bacpy(&cp.bdaddr, &conn->dst);
4394 return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ,
4395 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4398 static int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
4401 switch (conn->state) {
4404 return hci_disconnect_sync(hdev, conn, reason);
4406 return hci_connect_cancel_sync(hdev, conn);
4408 return hci_reject_conn_sync(hdev, conn, reason);
4410 conn->state = BT_CLOSED;
4417 static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
4419 struct hci_conn *conn, *tmp;
4422 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
4423 err = hci_abort_conn_sync(hdev, conn, reason);
4431 /* This function perform power off HCI command sequence as follows:
4435 * Disconnect all connections
4436 * hci_dev_close_sync
4438 static int hci_power_off_sync(struct hci_dev *hdev)
4442 /* If controller is already down there is nothing to do */
4443 if (!test_bit(HCI_UP, &hdev->flags))
4446 if (test_bit(HCI_ISCAN, &hdev->flags) ||
4447 test_bit(HCI_PSCAN, &hdev->flags)) {
4448 err = hci_write_scan_enable_sync(hdev, 0x00);
4453 err = hci_clear_adv_sync(hdev, NULL, false);
4457 err = hci_stop_discovery_sync(hdev);
4461 /* Terminated due to Power Off */
4462 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
4466 return hci_dev_close_sync(hdev);
4469 int hci_set_powered_sync(struct hci_dev *hdev, u8 val)
4472 return hci_power_on_sync(hdev);
4474 return hci_power_off_sync(hdev);
4477 static int hci_write_iac_sync(struct hci_dev *hdev)
4479 struct hci_cp_write_current_iac_lap cp;
4481 if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
4484 memset(&cp, 0, sizeof(cp));
4486 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) {
4487 /* Limited discoverable mode */
4488 cp.num_iac = min_t(u8, hdev->num_iac, 2);
4489 cp.iac_lap[0] = 0x00; /* LIAC */
4490 cp.iac_lap[1] = 0x8b;
4491 cp.iac_lap[2] = 0x9e;
4492 cp.iac_lap[3] = 0x33; /* GIAC */
4493 cp.iac_lap[4] = 0x8b;
4494 cp.iac_lap[5] = 0x9e;
4496 /* General discoverable mode */
4498 cp.iac_lap[0] = 0x33; /* GIAC */
4499 cp.iac_lap[1] = 0x8b;
4500 cp.iac_lap[2] = 0x9e;
4503 return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP,
4504 (cp.num_iac * 3) + 1, &cp,
4508 int hci_update_discoverable_sync(struct hci_dev *hdev)
4512 if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
4513 err = hci_write_iac_sync(hdev);
4517 err = hci_update_scan_sync(hdev);
4521 err = hci_update_class_sync(hdev);
4526 /* Advertising instances don't use the global discoverable setting, so
4527 * only update AD if advertising was enabled using Set Advertising.
4529 if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
4530 err = hci_update_adv_data_sync(hdev, 0x00);
4534 /* Discoverable mode affects the local advertising
4535 * address in limited privacy mode.
4537 if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) {
4538 if (ext_adv_capable(hdev))
4539 err = hci_start_ext_adv_sync(hdev, 0x00);
4541 err = hci_enable_advertising_sync(hdev);
4548 static int update_discoverable_sync(struct hci_dev *hdev, void *data)
4550 return hci_update_discoverable_sync(hdev);
4553 int hci_update_discoverable(struct hci_dev *hdev)
4555 /* Only queue if it would have any effect */
4556 if (hdev_is_powered(hdev) &&
4557 hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
4558 hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
4559 hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
4560 return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL,
4566 int hci_update_connectable_sync(struct hci_dev *hdev)
4570 err = hci_update_scan_sync(hdev);
4574 /* If BR/EDR is not enabled and we disable advertising as a
4575 * by-product of disabling connectable, we need to update the
4576 * advertising flags.
4578 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
4579 err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance);
4581 /* Update the advertising parameters if necessary */
4582 if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
4583 !list_empty(&hdev->adv_instances)) {
4584 if (ext_adv_capable(hdev))
4585 err = hci_start_ext_adv_sync(hdev,
4586 hdev->cur_adv_instance);
4588 err = hci_enable_advertising_sync(hdev);
4594 return hci_update_passive_scan_sync(hdev);
4597 static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
4599 const u8 giac[3] = { 0x33, 0x8b, 0x9e };
4600 const u8 liac[3] = { 0x00, 0x8b, 0x9e };
4601 struct hci_cp_inquiry cp;
4603 bt_dev_dbg(hdev, "");
4605 if (hci_dev_test_flag(hdev, HCI_INQUIRY))
4609 hci_inquiry_cache_flush(hdev);
4610 hci_dev_unlock(hdev);
4612 memset(&cp, 0, sizeof(cp));
4614 if (hdev->discovery.limited)
4615 memcpy(&cp.lap, liac, sizeof(cp.lap));
4617 memcpy(&cp.lap, giac, sizeof(cp.lap));
4621 return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
4622 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
4625 static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
4628 /* Accept list is not used for discovery */
4629 u8 filter_policy = 0x00;
4630 /* Default is to enable duplicates filter */
4631 u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
4634 bt_dev_dbg(hdev, "");
4636 /* If controller is scanning, it means the passive scanning is
4637 * running. Thus, we should temporarily stop it in order to set the
4638 * discovery scanning parameters.
4640 err = hci_scan_disable_sync(hdev);
4642 bt_dev_err(hdev, "Unable to disable scanning: %d", err);
4646 cancel_interleave_scan(hdev);
4648 /* Pause advertising since active scanning disables address resolution
4649 * which advertising depend on in order to generate its RPAs.
4651 if (use_ll_privacy(hdev)) {
4652 err = hci_pause_advertising_sync(hdev);
4654 bt_dev_err(hdev, "pause advertising failed: %d", err);
4659 /* Disable address resolution while doing active scanning since the
4660 * accept list shall not be used and all reports shall reach the host
4663 err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
4665 bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
4670 /* All active scans will be done with either a resolvable private
4671 * address (when privacy feature has been enabled) or non-resolvable
4674 err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
4677 own_addr_type = ADDR_LE_DEV_PUBLIC;
4679 if (hci_is_adv_monitoring(hdev)) {
4680 /* Duplicate filter should be disabled when some advertisement
4681 * monitor is activated, otherwise AdvMon can only receive one
4682 * advertisement for one peer(*) during active scanning, and
4683 * might report loss to these peers.
4685 * Note that different controllers have different meanings of
4686 * |duplicate|. Some of them consider packets with the same
4687 * address as duplicate, and others consider packets with the
4688 * same address and the same RSSI as duplicate. Although in the
4689 * latter case we don't need to disable duplicate filter, but
4690 * it is common to have active scanning for a short period of
4691 * time, the power impact should be neglectable.
4693 filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
4696 err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
4697 hdev->le_scan_window_discovery,
4698 own_addr_type, filter_policy, filter_dup);
4703 /* Resume advertising if it was paused */
4704 if (use_ll_privacy(hdev))
4705 hci_resume_advertising_sync(hdev);
4707 /* Resume passive scanning */
4708 hci_update_passive_scan_sync(hdev);
4712 static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
4716 bt_dev_dbg(hdev, "");
4718 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
4722 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
4725 int hci_start_discovery_sync(struct hci_dev *hdev)
4727 unsigned long timeout;
4730 bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
4732 switch (hdev->discovery.type) {
4733 case DISCOV_TYPE_BREDR:
4734 return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
4735 case DISCOV_TYPE_INTERLEAVED:
4736 /* When running simultaneous discovery, the LE scanning time
4737 * should occupy the whole discovery time sine BR/EDR inquiry
4738 * and LE scanning are scheduled by the controller.
4740 * For interleaving discovery in comparison, BR/EDR inquiry
4741 * and LE scanning are done sequentially with separate
4744 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
4746 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
4747 /* During simultaneous discovery, we double LE scan
4748 * interval. We must leave some time for the controller
4749 * to do BR/EDR inquiry.
4751 err = hci_start_interleaved_discovery_sync(hdev);
4755 timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
4756 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
4758 case DISCOV_TYPE_LE:
4759 timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
4760 err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
4769 bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
4771 /* When service discovery is used and the controller has a
4772 * strict duplicate filter, it is important to remember the
4773 * start and duration of the scan. This is required for
4774 * restarting scanning during the discovery phase.
4776 if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
4777 hdev->discovery.result_filtering) {
4778 hdev->discovery.scan_start = jiffies;
4779 hdev->discovery.scan_duration = timeout;
4782 queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
4787 static void hci_suspend_monitor_sync(struct hci_dev *hdev)
4789 switch (hci_get_adv_monitor_offload_ext(hdev)) {
4790 case HCI_ADV_MONITOR_EXT_MSFT:
4791 msft_suspend_sync(hdev);
4798 /* This function disables discovery and mark it as paused */
4799 static int hci_pause_discovery_sync(struct hci_dev *hdev)
4801 int old_state = hdev->discovery.state;
4804 /* If discovery already stopped/stopping/paused there nothing to do */
4805 if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING ||
4806 hdev->discovery_paused)
4809 hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
4810 err = hci_stop_discovery_sync(hdev);
4814 hdev->discovery_paused = true;
4815 hdev->discovery_old_state = old_state;
4816 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
4821 static int hci_update_event_filter_sync(struct hci_dev *hdev)
4823 struct bdaddr_list_with_flags *b;
4824 u8 scan = SCAN_DISABLED;
4825 bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
4828 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
4831 /* Always clear event filter when starting */
4832 hci_clear_event_filter_sync(hdev);
4834 list_for_each_entry(b, &hdev->accept_list, list) {
4835 if (!test_bit(HCI_CONN_FLAG_REMOTE_WAKEUP, b->flags))
4838 bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
4840 err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP,
4841 HCI_CONN_SETUP_ALLOW_BDADDR,
4843 HCI_CONN_SETUP_AUTO_ON);
4845 bt_dev_dbg(hdev, "Failed to set event filter for %pMR",
4851 if (scan && !scanning)
4852 hci_write_scan_enable_sync(hdev, scan);
4853 else if (!scan && scanning)
4854 hci_write_scan_enable_sync(hdev, scan);
4859 /* This function performs the HCI suspend procedures in the follow order:
4861 * Pause discovery (active scanning/inquiry)
4862 * Pause Directed Advertising/Advertising
4863 * Disconnect all connections
4864 * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup
4866 * Update event mask (only set events that are allowed to wake up the host)
4867 * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP)
4868 * Update passive scanning (lower duty cycle)
4869 * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE
4871 int hci_suspend_sync(struct hci_dev *hdev)
4875 /* If marked as suspended there nothing to do */
4876 if (hdev->suspended)
4879 /* Mark device as suspended */
4880 hdev->suspended = true;
4882 /* Pause discovery if not already stopped */
4883 hci_pause_discovery_sync(hdev);
4885 /* Pause other advertisements */
4886 hci_pause_advertising_sync(hdev);
4888 /* Disable page scan if enabled */
4889 if (test_bit(HCI_PSCAN, &hdev->flags))
4890 hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
4892 /* Suspend monitor filters */
4893 hci_suspend_monitor_sync(hdev);
4895 /* Prevent disconnects from causing scanning to be re-enabled */
4896 hdev->scanning_paused = true;
4898 /* Soft disconnect everything (power off) */
4899 err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF);
4901 /* Set state to BT_RUNNING so resume doesn't notify */
4902 hdev->suspend_state = BT_RUNNING;
4903 hci_resume_sync(hdev);
4907 /* Only configure accept list if disconnect succeeded and wake
4908 * isn't being prevented.
4910 if (!hdev->wakeup || !hdev->wakeup(hdev)) {
4911 hdev->suspend_state = BT_SUSPEND_DISCONNECT;
4915 /* Unpause to take care of updating scanning params */
4916 hdev->scanning_paused = false;
4918 /* Update event mask so only the allowed event can wakeup the host */
4919 hci_set_event_mask_sync(hdev);
4921 /* Enable event filter for paired devices */
4922 hci_update_event_filter_sync(hdev);
4924 /* Update LE passive scan if enabled */
4925 hci_update_passive_scan_sync(hdev);
4927 /* Pause scan changes again. */
4928 hdev->scanning_paused = true;
4930 hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE;
4935 /* This function resumes discovery */
4936 static int hci_resume_discovery_sync(struct hci_dev *hdev)
4940 /* If discovery not paused there nothing to do */
4941 if (!hdev->discovery_paused)
4944 hdev->discovery_paused = false;
4946 hci_discovery_set_state(hdev, DISCOVERY_STARTING);
4948 err = hci_start_discovery_sync(hdev);
4950 hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
4956 static void hci_resume_monitor_sync(struct hci_dev *hdev)
4958 switch (hci_get_adv_monitor_offload_ext(hdev)) {
4959 case HCI_ADV_MONITOR_EXT_MSFT:
4960 msft_resume_sync(hdev);
4967 /* This function performs the HCI suspend procedures in the follow order:
4969 * Restore event mask
4970 * Clear event filter
4971 * Update passive scanning (normal duty cycle)
4972 * Resume Directed Advertising/Advertising
4973 * Resume discovery (active scanning/inquiry)
4975 int hci_resume_sync(struct hci_dev *hdev)
4977 /* If not marked as suspended there nothing to do */
4978 if (!hdev->suspended)
4981 hdev->suspended = false;
4982 hdev->scanning_paused = false;
4984 /* Restore event mask */
4985 hci_set_event_mask_sync(hdev);
4987 /* Clear any event filters and restore scan state */
4988 hci_clear_event_filter_sync(hdev);
4989 hci_update_scan_sync(hdev);
4991 /* Reset passive scanning to normal */
4992 hci_update_passive_scan_sync(hdev);
4994 /* Resume monitor filters */
4995 hci_resume_monitor_sync(hdev);
4997 /* Resume other advertisements */
4998 hci_resume_advertising_sync(hdev);
5000 /* Resume discovery */
5001 hci_resume_discovery_sync(hdev);
5006 static bool conn_use_rpa(struct hci_conn *conn)
5008 struct hci_dev *hdev = conn->hdev;
5010 return hci_dev_test_flag(hdev, HCI_PRIVACY);
5013 static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev,
5014 struct hci_conn *conn)
5016 struct hci_cp_le_set_ext_adv_params cp;
5018 bdaddr_t random_addr;
5021 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5026 /* Set require_privacy to false so that the remote device has a
5027 * chance of identifying us.
5029 err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
5030 &own_addr_type, &random_addr);
5034 memset(&cp, 0, sizeof(cp));
5036 cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND);
5037 cp.own_addr_type = own_addr_type;
5038 cp.channel_map = hdev->le_adv_channel_map;
5039 cp.tx_power = HCI_TX_POWER_INVALID;
5040 cp.primary_phy = HCI_ADV_PHY_1M;
5041 cp.secondary_phy = HCI_ADV_PHY_1M;
5042 cp.handle = 0x00; /* Use instance 0 for directed adv */
5043 cp.own_addr_type = own_addr_type;
5044 cp.peer_addr_type = conn->dst_type;
5045 bacpy(&cp.peer_addr, &conn->dst);
5047 /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for
5048 * advertising_event_property LE_LEGACY_ADV_DIRECT_IND
5049 * does not supports advertising data when the advertising set already
5050 * contains some, the controller shall return erroc code 'Invalid
5051 * HCI Command Parameters(0x12).
5052 * So it is required to remove adv set for handle 0x00. since we use
5053 * instance 0 for directed adv.
5055 err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL);
5059 err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS,
5060 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5064 /* Check if random address need to be updated */
5065 if (own_addr_type == ADDR_LE_DEV_RANDOM &&
5066 bacmp(&random_addr, BDADDR_ANY) &&
5067 bacmp(&random_addr, &hdev->random_addr)) {
5068 err = hci_set_adv_set_random_addr_sync(hdev, 0x00,
5074 return hci_enable_ext_advertising_sync(hdev, 0x00);
5077 static int hci_le_directed_advertising_sync(struct hci_dev *hdev,
5078 struct hci_conn *conn)
5080 struct hci_cp_le_set_adv_param cp;
5085 if (ext_adv_capable(hdev))
5086 return hci_le_ext_directed_advertising_sync(hdev, conn);
5088 /* Clear the HCI_LE_ADV bit temporarily so that the
5089 * hci_update_random_address knows that it's safe to go ahead
5090 * and write a new random address. The flag will be set back on
5091 * as soon as the SET_ADV_ENABLE HCI command completes.
5093 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5095 /* Set require_privacy to false so that the remote device has a
5096 * chance of identifying us.
5098 status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5103 memset(&cp, 0, sizeof(cp));
5105 /* Some controllers might reject command if intervals are not
5106 * within range for undirected advertising.
5107 * BCM20702A0 is known to be affected by this.
5109 cp.min_interval = cpu_to_le16(0x0020);
5110 cp.max_interval = cpu_to_le16(0x0020);
5112 cp.type = LE_ADV_DIRECT_IND;
5113 cp.own_address_type = own_addr_type;
5114 cp.direct_addr_type = conn->dst_type;
5115 bacpy(&cp.direct_addr, &conn->dst);
5116 cp.channel_map = hdev->le_adv_channel_map;
5118 status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM,
5119 sizeof(cp), &cp, HCI_CMD_TIMEOUT);
5125 return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE,
5126 sizeof(enable), &enable, HCI_CMD_TIMEOUT);
5129 static void set_ext_conn_params(struct hci_conn *conn,
5130 struct hci_cp_le_ext_conn_param *p)
5132 struct hci_dev *hdev = conn->hdev;
5134 memset(p, 0, sizeof(*p));
5136 p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
5137 p->scan_window = cpu_to_le16(hdev->le_scan_window_connect);
5138 p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
5139 p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
5140 p->conn_latency = cpu_to_le16(conn->le_conn_latency);
5141 p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
5142 p->min_ce_len = cpu_to_le16(0x0000);
5143 p->max_ce_len = cpu_to_le16(0x0000);
5146 int hci_le_ext_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
5149 struct hci_cp_le_ext_create_conn *cp;
5150 struct hci_cp_le_ext_conn_param *p;
5151 u8 data[sizeof(*cp) + sizeof(*p) * 3];
5155 p = (void *)cp->data;
5157 memset(cp, 0, sizeof(*cp));
5159 bacpy(&cp->peer_addr, &conn->dst);
5160 cp->peer_addr_type = conn->dst_type;
5161 cp->own_addr_type = own_addr_type;
5165 if (scan_1m(hdev)) {
5166 cp->phys |= LE_SCAN_PHY_1M;
5167 set_ext_conn_params(conn, p);
5173 if (scan_2m(hdev)) {
5174 cp->phys |= LE_SCAN_PHY_2M;
5175 set_ext_conn_params(conn, p);
5181 if (scan_coded(hdev)) {
5182 cp->phys |= LE_SCAN_PHY_CODED;
5183 set_ext_conn_params(conn, p);
5188 return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN,
5190 HCI_EV_LE_ENHANCED_CONN_COMPLETE,
5191 conn->conn_timeout, NULL);
5194 int hci_le_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn)
5196 struct hci_cp_le_create_conn cp;
5197 struct hci_conn_params *params;
5201 /* If requested to connect as peripheral use directed advertising */
5202 if (conn->role == HCI_ROLE_SLAVE) {
5203 /* If we're active scanning and simultaneous roles is not
5204 * enabled simply reject the attempt.
5206 if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
5207 hdev->le_scan_type == LE_SCAN_ACTIVE &&
5208 !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
5213 /* Pause advertising while doing directed advertising. */
5214 hci_pause_advertising_sync(hdev);
5216 err = hci_le_directed_advertising_sync(hdev, conn);
5220 /* Disable advertising if simultaneous roles is not in use. */
5221 if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
5222 hci_pause_advertising_sync(hdev);
5224 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
5226 conn->le_conn_min_interval = params->conn_min_interval;
5227 conn->le_conn_max_interval = params->conn_max_interval;
5228 conn->le_conn_latency = params->conn_latency;
5229 conn->le_supv_timeout = params->supervision_timeout;
5231 conn->le_conn_min_interval = hdev->le_conn_min_interval;
5232 conn->le_conn_max_interval = hdev->le_conn_max_interval;
5233 conn->le_conn_latency = hdev->le_conn_latency;
5234 conn->le_supv_timeout = hdev->le_supv_timeout;
5237 /* If controller is scanning, we stop it since some controllers are
5238 * not able to scan and connect at the same time. Also set the
5239 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
5240 * handler for scan disabling knows to set the correct discovery
5243 if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
5244 hci_scan_disable_sync(hdev);
5245 hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
5248 /* Update random address, but set require_privacy to false so
5249 * that we never connect with an non-resolvable address.
5251 err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn),
5256 if (use_ext_conn(hdev)) {
5257 err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type);
5261 memset(&cp, 0, sizeof(cp));
5263 cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect);
5264 cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect);
5266 bacpy(&cp.peer_addr, &conn->dst);
5267 cp.peer_addr_type = conn->dst_type;
5268 cp.own_address_type = own_addr_type;
5269 cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
5270 cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
5271 cp.conn_latency = cpu_to_le16(conn->le_conn_latency);
5272 cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout);
5273 cp.min_ce_len = cpu_to_le16(0x0000);
5274 cp.max_ce_len = cpu_to_le16(0x0000);
5276 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261:
5278 * If this event is unmasked and the HCI_LE_Connection_Complete event
5279 * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is
5280 * sent when a new connection has been created.
5282 err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN,
5284 use_enhanced_conn_complete(hdev) ?
5285 HCI_EV_LE_ENHANCED_CONN_COMPLETE :
5286 HCI_EV_LE_CONN_COMPLETE,
5287 conn->conn_timeout, NULL);
5290 /* Re-enable advertising after the connection attempt is finished. */
5291 hci_resume_advertising_sync(hdev);