diff options
Diffstat (limited to 'net/bluetooth/hci_sync.c')
| -rw-r--r-- | net/bluetooth/hci_sync.c | 6316 |
1 files changed, 6316 insertions, 0 deletions
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c new file mode 100644 index 000000000..d74fe13f3 --- /dev/null +++ b/net/bluetooth/hci_sync.c @@ -0,0 +1,6316 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2021 Intel Corporation + */ + +#include <linux/property.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> +#include <net/bluetooth/mgmt.h> + +#include "hci_request.h" +#include "hci_codec.h" +#include "hci_debugfs.h" +#include "smp.h" +#include "eir.h" +#include "msft.h" +#include "aosp.h" +#include "leds.h" + +static void hci_cmd_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode, + struct sk_buff *skb) +{ + bt_dev_dbg(hdev, "result 0x%2.2x", result); + + if (hdev->req_status != HCI_REQ_PEND) + return; + + hdev->req_result = result; + hdev->req_status = HCI_REQ_DONE; + + if (skb) { + struct sock *sk = hci_skb_sk(skb); + + /* Drop sk reference if set */ + if (sk) + sock_put(sk); + + hdev->req_skb = skb_get(skb); + } + + wake_up_interruptible(&hdev->req_wait_q); +} + +static struct sk_buff *hci_cmd_sync_alloc(struct hci_dev *hdev, u16 opcode, + u32 plen, const void *param, + struct sock *sk) +{ + int len = HCI_COMMAND_HDR_SIZE + plen; + struct hci_command_hdr *hdr; + struct sk_buff *skb; + + skb = bt_skb_alloc(len, GFP_ATOMIC); + if (!skb) + return NULL; + + hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE); + hdr->opcode = cpu_to_le16(opcode); + hdr->plen = plen; + + if (plen) + skb_put_data(skb, param, plen); + + bt_dev_dbg(hdev, "skb len %d", skb->len); + + hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; + hci_skb_opcode(skb) = opcode; + + /* Grab a reference if command needs to be associated with a sock (e.g. + * likely mgmt socket that initiated the command). + */ + if (sk) { + hci_skb_sk(skb) = sk; + sock_hold(sk); + } + + return skb; +} + +static void hci_cmd_sync_add(struct hci_request *req, u16 opcode, u32 plen, + const void *param, u8 event, struct sock *sk) +{ + struct hci_dev *hdev = req->hdev; + struct sk_buff *skb; + + bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen); + + /* If an error occurred during request building, there is no point in + * queueing the HCI command. We can simply return. + */ + if (req->err) + return; + + skb = hci_cmd_sync_alloc(hdev, opcode, plen, param, sk); + if (!skb) { + bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)", + opcode); + req->err = -ENOMEM; + return; + } + + if (skb_queue_empty(&req->cmd_q)) + bt_cb(skb)->hci.req_flags |= HCI_REQ_START; + + hci_skb_event(skb) = event; + + skb_queue_tail(&req->cmd_q, skb); +} + +static int hci_cmd_sync_run(struct hci_request *req) +{ + struct hci_dev *hdev = req->hdev; + struct sk_buff *skb; + unsigned long flags; + + bt_dev_dbg(hdev, "length %u", skb_queue_len(&req->cmd_q)); + + /* If an error occurred during request building, remove all HCI + * commands queued on the HCI request queue. + */ + if (req->err) { + skb_queue_purge(&req->cmd_q); + return req->err; + } + + /* Do not allow empty requests */ + if (skb_queue_empty(&req->cmd_q)) + return -ENODATA; + + skb = skb_peek_tail(&req->cmd_q); + bt_cb(skb)->hci.req_complete_skb = hci_cmd_sync_complete; + bt_cb(skb)->hci.req_flags |= HCI_REQ_SKB; + + spin_lock_irqsave(&hdev->cmd_q.lock, flags); + skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q); + spin_unlock_irqrestore(&hdev->cmd_q.lock, flags); + + queue_work(hdev->workqueue, &hdev->cmd_work); + + return 0; +} + +/* This function requires the caller holds hdev->req_lock. */ +struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen, + const void *param, u8 event, u32 timeout, + struct sock *sk) +{ + struct hci_request req; + struct sk_buff *skb; + int err = 0; + + bt_dev_dbg(hdev, "Opcode 0x%4.4x", opcode); + + hci_req_init(&req, hdev); + + hci_cmd_sync_add(&req, opcode, plen, param, event, sk); + + hdev->req_status = HCI_REQ_PEND; + + err = hci_cmd_sync_run(&req); + if (err < 0) + return ERR_PTR(err); + + err = wait_event_interruptible_timeout(hdev->req_wait_q, + hdev->req_status != HCI_REQ_PEND, + timeout); + + if (err == -ERESTARTSYS) + return ERR_PTR(-EINTR); + + switch (hdev->req_status) { + case HCI_REQ_DONE: + err = -bt_to_errno(hdev->req_result); + break; + + case HCI_REQ_CANCELED: + err = -hdev->req_result; + break; + + default: + err = -ETIMEDOUT; + break; + } + + hdev->req_status = 0; + hdev->req_result = 0; + skb = hdev->req_skb; + hdev->req_skb = NULL; + + bt_dev_dbg(hdev, "end: err %d", err); + + if (err < 0) { + kfree_skb(skb); + return ERR_PTR(err); + } + + return skb; +} +EXPORT_SYMBOL(__hci_cmd_sync_sk); + +/* This function requires the caller holds hdev->req_lock. */ +struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen, + const void *param, u32 timeout) +{ + return __hci_cmd_sync_sk(hdev, opcode, plen, param, 0, timeout, NULL); +} +EXPORT_SYMBOL(__hci_cmd_sync); + +/* Send HCI command and wait for command complete event */ +struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen, + const void *param, u32 timeout) +{ + struct sk_buff *skb; + + if (!test_bit(HCI_UP, &hdev->flags)) + return ERR_PTR(-ENETDOWN); + + bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen); + + hci_req_sync_lock(hdev); + skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout); + hci_req_sync_unlock(hdev); + + return skb; +} +EXPORT_SYMBOL(hci_cmd_sync); + +/* This function requires the caller holds hdev->req_lock. */ +struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen, + const void *param, u8 event, u32 timeout) +{ + return __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, + NULL); +} +EXPORT_SYMBOL(__hci_cmd_sync_ev); + +/* This function requires the caller holds hdev->req_lock. */ +int __hci_cmd_sync_status_sk(struct hci_dev *hdev, u16 opcode, u32 plen, + const void *param, u8 event, u32 timeout, + struct sock *sk) +{ + struct sk_buff *skb; + u8 status; + + skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk); + if (IS_ERR(skb)) { + if (!event) + bt_dev_err(hdev, "Opcode 0x%4.4x failed: %ld", opcode, + PTR_ERR(skb)); + return PTR_ERR(skb); + } + + /* If command return a status event skb will be set to NULL as there are + * no parameters, in case of failure IS_ERR(skb) would have be set to + * the actual error would be found with PTR_ERR(skb). + */ + if (!skb) + return 0; + + status = skb->data[0]; + + kfree_skb(skb); + + return status; +} +EXPORT_SYMBOL(__hci_cmd_sync_status_sk); + +int __hci_cmd_sync_status(struct hci_dev *hdev, u16 opcode, u32 plen, + const void *param, u32 timeout) +{ + return __hci_cmd_sync_status_sk(hdev, opcode, plen, param, 0, timeout, + NULL); +} +EXPORT_SYMBOL(__hci_cmd_sync_status); + +static void hci_cmd_sync_work(struct work_struct *work) +{ + struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_work); + + bt_dev_dbg(hdev, ""); + + /* Dequeue all entries and run them */ + while (1) { + struct hci_cmd_sync_work_entry *entry; + + mutex_lock(&hdev->cmd_sync_work_lock); + entry = list_first_entry_or_null(&hdev->cmd_sync_work_list, + struct hci_cmd_sync_work_entry, + list); + if (entry) + list_del(&entry->list); + mutex_unlock(&hdev->cmd_sync_work_lock); + + if (!entry) + break; + + bt_dev_dbg(hdev, "entry %p", entry); + + if (entry->func) { + int err; + + hci_req_sync_lock(hdev); + err = entry->func(hdev, entry->data); + if (entry->destroy) + entry->destroy(hdev, entry->data, err); + hci_req_sync_unlock(hdev); + } + + kfree(entry); + } +} + +static void hci_cmd_sync_cancel_work(struct work_struct *work) +{ + struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_sync_cancel_work); + + cancel_delayed_work_sync(&hdev->cmd_timer); + cancel_delayed_work_sync(&hdev->ncmd_timer); + atomic_set(&hdev->cmd_cnt, 1); + + wake_up_interruptible(&hdev->req_wait_q); +} + +static int hci_scan_disable_sync(struct hci_dev *hdev); +static int scan_disable_sync(struct hci_dev *hdev, void *data) +{ + return hci_scan_disable_sync(hdev); +} + +static int hci_inquiry_sync(struct hci_dev *hdev, u8 length); +static int interleaved_inquiry_sync(struct hci_dev *hdev, void *data) +{ + return hci_inquiry_sync(hdev, DISCOV_INTERLEAVED_INQUIRY_LEN); +} + +static void le_scan_disable(struct work_struct *work) +{ + struct hci_dev *hdev = container_of(work, struct hci_dev, + le_scan_disable.work); + int status; + + bt_dev_dbg(hdev, ""); + hci_dev_lock(hdev); + + if (!hci_dev_test_flag(hdev, HCI_LE_SCAN)) + goto _return; + + cancel_delayed_work(&hdev->le_scan_restart); + + status = hci_cmd_sync_queue(hdev, scan_disable_sync, NULL, NULL); + if (status) { + bt_dev_err(hdev, "failed to disable LE scan: %d", status); + goto _return; + } + + hdev->discovery.scan_start = 0; + + /* If we were running LE only scan, change discovery state. If + * we were running both LE and BR/EDR inquiry simultaneously, + * and BR/EDR inquiry is already finished, stop discovery, + * otherwise BR/EDR inquiry will stop discovery when finished. + * If we will resolve remote device name, do not change + * discovery state. + */ + + if (hdev->discovery.type == DISCOV_TYPE_LE) + goto discov_stopped; + + if (hdev->discovery.type != DISCOV_TYPE_INTERLEAVED) + goto _return; + + if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks)) { + if (!test_bit(HCI_INQUIRY, &hdev->flags) && + hdev->discovery.state != DISCOVERY_RESOLVING) + goto discov_stopped; + + goto _return; + } + + status = hci_cmd_sync_queue(hdev, interleaved_inquiry_sync, NULL, NULL); + if (status) { + bt_dev_err(hdev, "inquiry failed: status %d", status); + goto discov_stopped; + } + + goto _return; + +discov_stopped: + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + +_return: + hci_dev_unlock(hdev); +} + +static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val, + u8 filter_dup); +static int hci_le_scan_restart_sync(struct hci_dev *hdev) +{ + /* If controller is not scanning we are done. */ + if (!hci_dev_test_flag(hdev, HCI_LE_SCAN)) + return 0; + + if (hdev->scanning_paused) { + bt_dev_dbg(hdev, "Scanning is paused for suspend"); + return 0; + } + + hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00); + return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, + LE_SCAN_FILTER_DUP_ENABLE); +} + +static void le_scan_restart(struct work_struct *work) +{ + struct hci_dev *hdev = container_of(work, struct hci_dev, + le_scan_restart.work); + unsigned long timeout, duration, scan_start, now; + int status; + + bt_dev_dbg(hdev, ""); + + status = hci_le_scan_restart_sync(hdev); + if (status) { + bt_dev_err(hdev, "failed to restart LE scan: status %d", + status); + return; + } + + hci_dev_lock(hdev); + + if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) || + !hdev->discovery.scan_start) + goto unlock; + + /* When the scan was started, hdev->le_scan_disable has been queued + * after duration from scan_start. During scan restart this job + * has been canceled, and we need to queue it again after proper + * timeout, to make sure that scan does not run indefinitely. + */ + duration = hdev->discovery.scan_duration; + scan_start = hdev->discovery.scan_start; + now = jiffies; + if (now - scan_start <= duration) { + int elapsed; + + if (now >= scan_start) + elapsed = now - scan_start; + else + elapsed = ULONG_MAX - scan_start + now; + + timeout = duration - elapsed; + } else { + timeout = 0; + } + + queue_delayed_work(hdev->req_workqueue, + &hdev->le_scan_disable, timeout); + +unlock: + hci_dev_unlock(hdev); +} + +static int reenable_adv_sync(struct hci_dev *hdev, void *data) +{ + bt_dev_dbg(hdev, ""); + + if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) && + list_empty(&hdev->adv_instances)) + return 0; + + if (hdev->cur_adv_instance) { + return hci_schedule_adv_instance_sync(hdev, + hdev->cur_adv_instance, + true); + } else { + if (ext_adv_capable(hdev)) { + hci_start_ext_adv_sync(hdev, 0x00); + } else { + hci_update_adv_data_sync(hdev, 0x00); + hci_update_scan_rsp_data_sync(hdev, 0x00); + hci_enable_advertising_sync(hdev); + } + } + + return 0; +} + +static void reenable_adv(struct work_struct *work) +{ + struct hci_dev *hdev = container_of(work, struct hci_dev, + reenable_adv_work); + int status; + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + status = hci_cmd_sync_queue(hdev, reenable_adv_sync, NULL, NULL); + if (status) + bt_dev_err(hdev, "failed to reenable ADV: %d", status); + + hci_dev_unlock(hdev); +} + +static void cancel_adv_timeout(struct hci_dev *hdev) +{ + if (hdev->adv_instance_timeout) { + hdev->adv_instance_timeout = 0; + cancel_delayed_work(&hdev->adv_instance_expire); + } +} + +/* For a single instance: + * - force == true: The instance will be removed even when its remaining + * lifetime is not zero. + * - force == false: the instance will be deactivated but kept stored unless + * the remaining lifetime is zero. + * + * For instance == 0x00: + * - force == true: All instances will be removed regardless of their timeout + * setting. + * - force == false: Only instances that have a timeout will be removed. + */ +int hci_clear_adv_instance_sync(struct hci_dev *hdev, struct sock *sk, + u8 instance, bool force) +{ + struct adv_info *adv_instance, *n, *next_instance = NULL; + int err; + u8 rem_inst; + + /* Cancel any timeout concerning the removed instance(s). */ + if (!instance || hdev->cur_adv_instance == instance) + cancel_adv_timeout(hdev); + + /* Get the next instance to advertise BEFORE we remove + * the current one. This can be the same instance again + * if there is only one instance. + */ + if (instance && hdev->cur_adv_instance == instance) + next_instance = hci_get_next_instance(hdev, instance); + + if (instance == 0x00) { + list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, + list) { + if (!(force || adv_instance->timeout)) + continue; + + rem_inst = adv_instance->instance; + err = hci_remove_adv_instance(hdev, rem_inst); + if (!err) + mgmt_advertising_removed(sk, hdev, rem_inst); + } + } else { + adv_instance = hci_find_adv_instance(hdev, instance); + + if (force || (adv_instance && adv_instance->timeout && + !adv_instance->remaining_time)) { + /* Don't advertise a removed instance. */ + if (next_instance && + next_instance->instance == instance) + next_instance = NULL; + + err = hci_remove_adv_instance(hdev, instance); + if (!err) + mgmt_advertising_removed(sk, hdev, instance); + } + } + + if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING)) + return 0; + + if (next_instance && !ext_adv_capable(hdev)) + return hci_schedule_adv_instance_sync(hdev, + next_instance->instance, + false); + + return 0; +} + +static int adv_timeout_expire_sync(struct hci_dev *hdev, void *data) +{ + u8 instance = *(u8 *)data; + + kfree(data); + + hci_clear_adv_instance_sync(hdev, NULL, instance, false); + + if (list_empty(&hdev->adv_instances)) + return hci_disable_advertising_sync(hdev); + + return 0; +} + +static void adv_timeout_expire(struct work_struct *work) +{ + u8 *inst_ptr; + struct hci_dev *hdev = container_of(work, struct hci_dev, + adv_instance_expire.work); + + bt_dev_dbg(hdev, ""); + + hci_dev_lock(hdev); + + hdev->adv_instance_timeout = 0; + + if (hdev->cur_adv_instance == 0x00) + goto unlock; + + inst_ptr = kmalloc(1, GFP_KERNEL); + if (!inst_ptr) + goto unlock; + + *inst_ptr = hdev->cur_adv_instance; + hci_cmd_sync_queue(hdev, adv_timeout_expire_sync, inst_ptr, NULL); + +unlock: + hci_dev_unlock(hdev); +} + +void hci_cmd_sync_init(struct hci_dev *hdev) +{ + INIT_WORK(&hdev->cmd_sync_work, hci_cmd_sync_work); + INIT_LIST_HEAD(&hdev->cmd_sync_work_list); + mutex_init(&hdev->cmd_sync_work_lock); + mutex_init(&hdev->unregister_lock); + + INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work); + INIT_WORK(&hdev->reenable_adv_work, reenable_adv); + INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable); + INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart); + INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire); +} + +void hci_cmd_sync_clear(struct hci_dev *hdev) +{ + struct hci_cmd_sync_work_entry *entry, *tmp; + + cancel_work_sync(&hdev->cmd_sync_work); + cancel_work_sync(&hdev->reenable_adv_work); + + mutex_lock(&hdev->cmd_sync_work_lock); + list_for_each_entry_safe(entry, tmp, &hdev->cmd_sync_work_list, list) { + if (entry->destroy) + entry->destroy(hdev, entry->data, -ECANCELED); + + list_del(&entry->list); + kfree(entry); + } + mutex_unlock(&hdev->cmd_sync_work_lock); +} + +void __hci_cmd_sync_cancel(struct hci_dev *hdev, int err) +{ + bt_dev_dbg(hdev, "err 0x%2.2x", err); + + if (hdev->req_status == HCI_REQ_PEND) { + hdev->req_result = err; + hdev->req_status = HCI_REQ_CANCELED; + + cancel_delayed_work_sync(&hdev->cmd_timer); + cancel_delayed_work_sync(&hdev->ncmd_timer); + atomic_set(&hdev->cmd_cnt, 1); + + wake_up_interruptible(&hdev->req_wait_q); + } +} + +void hci_cmd_sync_cancel(struct hci_dev *hdev, int err) +{ + bt_dev_dbg(hdev, "err 0x%2.2x", err); + + if (hdev->req_status == HCI_REQ_PEND) { + hdev->req_result = err; + hdev->req_status = HCI_REQ_CANCELED; + + queue_work(hdev->workqueue, &hdev->cmd_sync_cancel_work); + } +} +EXPORT_SYMBOL(hci_cmd_sync_cancel); + +int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func, + void *data, hci_cmd_sync_work_destroy_t destroy) +{ + struct hci_cmd_sync_work_entry *entry; + int err = 0; + + mutex_lock(&hdev->unregister_lock); + if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) { + err = -ENODEV; + goto unlock; + } + + entry = kmalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) { + err = -ENOMEM; + goto unlock; + } + entry->func = func; + entry->data = data; + entry->destroy = destroy; + + mutex_lock(&hdev->cmd_sync_work_lock); + list_add_tail(&entry->list, &hdev->cmd_sync_work_list); + mutex_unlock(&hdev->cmd_sync_work_lock); + + queue_work(hdev->req_workqueue, &hdev->cmd_sync_work); + +unlock: + mutex_unlock(&hdev->unregister_lock); + return err; +} +EXPORT_SYMBOL(hci_cmd_sync_queue); + +int hci_update_eir_sync(struct hci_dev *hdev) +{ + struct hci_cp_write_eir cp; + + bt_dev_dbg(hdev, ""); + + if (!hdev_is_powered(hdev)) + return 0; + + if (!lmp_ext_inq_capable(hdev)) + return 0; + + if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) + return 0; + + if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE)) + return 0; + + memset(&cp, 0, sizeof(cp)); + + eir_create(hdev, cp.data); + + if (memcmp(cp.data, hdev->eir, sizeof(cp.data)) == 0) + return 0; + + memcpy(hdev->eir, cp.data, sizeof(cp.data)); + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp, + HCI_CMD_TIMEOUT); +} + +static u8 get_service_classes(struct hci_dev *hdev) +{ + struct bt_uuid *uuid; + u8 val = 0; + + list_for_each_entry(uuid, &hdev->uuids, list) + val |= uuid->svc_hint; + + return val; +} + +int hci_update_class_sync(struct hci_dev *hdev) +{ + u8 cod[3]; + + bt_dev_dbg(hdev, ""); + + if (!hdev_is_powered(hdev)) + return 0; + + if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) + return 0; + + if (hci_dev_test_flag(hdev, HCI_SERVICE_CACHE)) + return 0; + + cod[0] = hdev->minor_class; + cod[1] = hdev->major_class; + cod[2] = get_service_classes(hdev); + + if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) + cod[1] |= 0x20; + + if (memcmp(cod, hdev->dev_class, 3) == 0) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CLASS_OF_DEV, + sizeof(cod), cod, HCI_CMD_TIMEOUT); +} + +static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable) +{ + /* If there is no connection we are OK to advertise. */ + if (hci_conn_num(hdev, LE_LINK) == 0) + return true; + + /* Check le_states if there is any connection in peripheral role. */ + if (hdev->conn_hash.le_num_peripheral > 0) { + /* Peripheral connection state and non connectable mode + * bit 20. + */ + if (!connectable && !(hdev->le_states[2] & 0x10)) + return false; + + /* Peripheral connection state and connectable mode bit 38 + * and scannable bit 21. + */ + if (connectable && (!(hdev->le_states[4] & 0x40) || + !(hdev->le_states[2] & 0x20))) + return false; + } + + /* Check le_states if there is any connection in central role. */ + if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_peripheral) { + /* Central connection state and non connectable mode bit 18. */ + if (!connectable && !(hdev->le_states[2] & 0x02)) + return false; + + /* Central connection state and connectable mode bit 35 and + * scannable 19. + */ + if (connectable && (!(hdev->le_states[4] & 0x08) || + !(hdev->le_states[2] & 0x08))) + return false; + } + + return true; +} + +static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags) +{ + /* If privacy is not enabled don't use RPA */ + if (!hci_dev_test_flag(hdev, HCI_PRIVACY)) + return false; + + /* If basic privacy mode is enabled use RPA */ + if (!hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) + return true; + + /* If limited privacy mode is enabled don't use RPA if we're + * both discoverable and bondable. + */ + if ((flags & MGMT_ADV_FLAG_DISCOV) && + hci_dev_test_flag(hdev, HCI_BONDABLE)) + return false; + + /* We're neither bondable nor discoverable in the limited + * privacy mode, therefore use RPA. + */ + return true; +} + +static int hci_set_random_addr_sync(struct hci_dev *hdev, bdaddr_t *rpa) +{ + /* If we're advertising or initiating an LE connection we can't + * go ahead and change the random address at this time. This is + * because the eventual initiator address used for the + * subsequently created connection will be undefined (some + * controllers use the new address and others the one we had + * when the operation started). + * + * In this kind of scenario skip the update and let the random + * address be updated at the next cycle. + */ + if (hci_dev_test_flag(hdev, HCI_LE_ADV) || + hci_lookup_le_connect(hdev)) { + bt_dev_dbg(hdev, "Deferring random address update"); + hci_dev_set_flag(hdev, HCI_RPA_EXPIRED); + return 0; + } + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RANDOM_ADDR, + 6, rpa, HCI_CMD_TIMEOUT); +} + +int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy, + bool rpa, u8 *own_addr_type) +{ + int err; + + /* If privacy is enabled use a resolvable private address. If + * current RPA has expired or there is something else than + * the current RPA in use, then generate a new one. + */ + if (rpa) { + /* If Controller supports LL Privacy use own address type is + * 0x03 + */ + if (use_ll_privacy(hdev)) + *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED; + else + *own_addr_type = ADDR_LE_DEV_RANDOM; + + /* Check if RPA is valid */ + if (rpa_valid(hdev)) + return 0; + + err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa); + if (err < 0) { + bt_dev_err(hdev, "failed to generate new RPA"); + return err; + } + + err = hci_set_random_addr_sync(hdev, &hdev->rpa); + if (err) + return err; + + return 0; + } + + /* In case of required privacy without resolvable private address, + * use an non-resolvable private address. This is useful for active + * scanning and non-connectable advertising. + */ + if (require_privacy) { + bdaddr_t nrpa; + + while (true) { + /* The non-resolvable private address is generated + * from random six bytes with the two most significant + * bits cleared. + */ + get_random_bytes(&nrpa, 6); + nrpa.b[5] &= 0x3f; + + /* The non-resolvable private address shall not be + * equal to the public address. + */ + if (bacmp(&hdev->bdaddr, &nrpa)) + break; + } + + *own_addr_type = ADDR_LE_DEV_RANDOM; + + return hci_set_random_addr_sync(hdev, &nrpa); + } + + /* If forcing static address is in use or there is no public + * address use the static address as random address (but skip + * the HCI command if the current random address is already the + * static one. + * + * In case BR/EDR has been disabled on a dual-mode controller + * and a static address has been configured, then use that + * address instead of the public BR/EDR address. + */ + if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) || + !bacmp(&hdev->bdaddr, BDADDR_ANY) || + (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) && + bacmp(&hdev->static_addr, BDADDR_ANY))) { + *own_addr_type = ADDR_LE_DEV_RANDOM; + if (bacmp(&hdev->static_addr, &hdev->random_addr)) + return hci_set_random_addr_sync(hdev, + &hdev->static_addr); + return 0; + } + + /* Neither privacy nor static address is being used so use a + * public address. + */ + *own_addr_type = ADDR_LE_DEV_PUBLIC; + + return 0; +} + +static int hci_disable_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance) +{ + struct hci_cp_le_set_ext_adv_enable *cp; + struct hci_cp_ext_adv_set *set; + u8 data[sizeof(*cp) + sizeof(*set) * 1]; + u8 size; + + /* If request specifies an instance that doesn't exist, fail */ + if (instance > 0) { + struct adv_info *adv; + + adv = hci_find_adv_instance(hdev, instance); + if (!adv) + return -EINVAL; + + /* If not enabled there is nothing to do */ + if (!adv->enabled) + return 0; + } + + memset(data, 0, sizeof(data)); + + cp = (void *)data; + set = (void *)cp->data; + + /* Instance 0x00 indicates all advertising instances will be disabled */ + cp->num_of_sets = !!instance; + cp->enable = 0x00; + + set->handle = instance; + + size = sizeof(*cp) + sizeof(*set) * cp->num_of_sets; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, + size, data, HCI_CMD_TIMEOUT); +} + +static int hci_set_adv_set_random_addr_sync(struct hci_dev *hdev, u8 instance, + bdaddr_t *random_addr) +{ + struct hci_cp_le_set_adv_set_rand_addr cp; + int err; + + if (!instance) { + /* Instance 0x00 doesn't have an adv_info, instead it uses + * hdev->random_addr to track its address so whenever it needs + * to be updated this also set the random address since + * hdev->random_addr is shared with scan state machine. + */ + err = hci_set_random_addr_sync(hdev, random_addr); + if (err) + return err; + } + + memset(&cp, 0, sizeof(cp)); + + cp.handle = instance; + bacpy(&cp.bdaddr, random_addr); + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_setup_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance) +{ + struct hci_cp_le_set_ext_adv_params cp; + bool connectable; + u32 flags; + bdaddr_t random_addr; + u8 own_addr_type; + int err; + struct adv_info *adv; + bool secondary_adv; + + if (instance > 0) { + adv = hci_find_adv_instance(hdev, instance); + if (!adv) + return -EINVAL; + } else { + adv = NULL; + } + + /* Updating parameters of an active instance will return a + * Command Disallowed error, so we must first disable the + * instance if it is active. + */ + if (adv && !adv->pending) { + err = hci_disable_ext_adv_instance_sync(hdev, instance); + if (err) + return err; + } + + flags = hci_adv_instance_flags(hdev, instance); + + /* If the "connectable" instance flag was not set, then choose between + * ADV_IND and ADV_NONCONN_IND based on the global connectable setting. + */ + connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) || + mgmt_get_connectable(hdev); + + if (!is_advertising_allowed(hdev, connectable)) + return -EPERM; + + /* Set require_privacy to true only when non-connectable + * advertising is used. In that case it is fine to use a + * non-resolvable private address. + */ + err = hci_get_random_address(hdev, !connectable, + adv_use_rpa(hdev, flags), adv, + &own_addr_type, &random_addr); + if (err < 0) + return err; + + memset(&cp, 0, sizeof(cp)); + + if (adv) { + hci_cpu_to_le24(adv->min_interval, cp.min_interval); + hci_cpu_to_le24(adv->max_interval, cp.max_interval); + cp.tx_power = adv->tx_power; + } else { + hci_cpu_to_le24(hdev->le_adv_min_interval, cp.min_interval); + hci_cpu_to_le24(hdev->le_adv_max_interval, cp.max_interval); + cp.tx_power = HCI_ADV_TX_POWER_NO_PREFERENCE; + } + + secondary_adv = (flags & MGMT_ADV_FLAG_SEC_MASK); + + if (connectable) { + if (secondary_adv) + cp.evt_properties = cpu_to_le16(LE_EXT_ADV_CONN_IND); + else + cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_IND); + } else if (hci_adv_instance_is_scannable(hdev, instance) || + (flags & MGMT_ADV_PARAM_SCAN_RSP)) { + if (secondary_adv) + cp.evt_properties = cpu_to_le16(LE_EXT_ADV_SCAN_IND); + else + cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_SCAN_IND); + } else { + if (secondary_adv) + cp.evt_properties = cpu_to_le16(LE_EXT_ADV_NON_CONN_IND); + else + cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND); + } + + /* If Own_Address_Type equals 0x02 or 0x03, the Peer_Address parameter + * contains the peer’s Identity Address and the Peer_Address_Type + * parameter contains the peer’s Identity Type (i.e., 0x00 or 0x01). + * These parameters are used to locate the corresponding local IRK in + * the resolving list; this IRK is used to generate their own address + * used in the advertisement. + */ + if (own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) + hci_copy_identity_address(hdev, &cp.peer_addr, + &cp.peer_addr_type); + + cp.own_addr_type = own_addr_type; + cp.channel_map = hdev->le_adv_channel_map; + cp.handle = instance; + + if (flags & MGMT_ADV_FLAG_SEC_2M) { + cp.primary_phy = HCI_ADV_PHY_1M; + cp.secondary_phy = HCI_ADV_PHY_2M; + } else if (flags & MGMT_ADV_FLAG_SEC_CODED) { + cp.primary_phy = HCI_ADV_PHY_CODED; + cp.secondary_phy = HCI_ADV_PHY_CODED; + } else { + /* In all other cases use 1M */ + cp.primary_phy = HCI_ADV_PHY_1M; + cp.secondary_phy = HCI_ADV_PHY_1M; + } + + err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); + if (err) + return err; + + if ((own_addr_type == ADDR_LE_DEV_RANDOM || + own_addr_type == ADDR_LE_DEV_RANDOM_RESOLVED) && + bacmp(&random_addr, BDADDR_ANY)) { + /* Check if random address need to be updated */ + if (adv) { + if (!bacmp(&random_addr, &adv->random_addr)) + return 0; + } else { + if (!bacmp(&random_addr, &hdev->random_addr)) + return 0; + } + + return hci_set_adv_set_random_addr_sync(hdev, instance, + &random_addr); + } + + return 0; +} + +static int hci_set_ext_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance) +{ + struct { + struct hci_cp_le_set_ext_scan_rsp_data cp; + u8 data[HCI_MAX_EXT_AD_LENGTH]; + } pdu; + u8 len; + struct adv_info *adv = NULL; + int err; + + memset(&pdu, 0, sizeof(pdu)); + + if (instance) { + adv = hci_find_adv_instance(hdev, instance); + if (!adv || !adv->scan_rsp_changed) + return 0; + } + + len = eir_create_scan_rsp(hdev, instance, pdu.data); + + pdu.cp.handle = instance; + pdu.cp.length = len; + pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE; + pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG; + + err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_RSP_DATA, + sizeof(pdu.cp) + len, &pdu.cp, + HCI_CMD_TIMEOUT); + if (err) + return err; + + if (adv) { + adv->scan_rsp_changed = false; + } else { + memcpy(hdev->scan_rsp_data, pdu.data, len); + hdev->scan_rsp_data_len = len; + } + + return 0; +} + +static int __hci_set_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance) +{ + struct hci_cp_le_set_scan_rsp_data cp; + u8 len; + + memset(&cp, 0, sizeof(cp)); + + len = eir_create_scan_rsp(hdev, instance, cp.data); + + if (hdev->scan_rsp_data_len == len && + !memcmp(cp.data, hdev->scan_rsp_data, len)) + return 0; + + memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data)); + hdev->scan_rsp_data_len = len; + + cp.length = len; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_RSP_DATA, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_update_scan_rsp_data_sync(struct hci_dev *hdev, u8 instance) +{ + if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) + return 0; + + if (ext_adv_capable(hdev)) + return hci_set_ext_scan_rsp_data_sync(hdev, instance); + + return __hci_set_scan_rsp_data_sync(hdev, instance); +} + +int hci_enable_ext_advertising_sync(struct hci_dev *hdev, u8 instance) +{ + struct hci_cp_le_set_ext_adv_enable *cp; + struct hci_cp_ext_adv_set *set; + u8 data[sizeof(*cp) + sizeof(*set) * 1]; + struct adv_info *adv; + + if (instance > 0) { + adv = hci_find_adv_instance(hdev, instance); + if (!adv) + return -EINVAL; + /* If already enabled there is nothing to do */ + if (adv->enabled) + return 0; + } else { + adv = NULL; + } + + cp = (void *)data; + set = (void *)cp->data; + + memset(cp, 0, sizeof(*cp)); + + cp->enable = 0x01; + cp->num_of_sets = 0x01; + + memset(set, 0, sizeof(*set)); + + set->handle = instance; + + /* Set duration per instance since controller is responsible for + * scheduling it. + */ + if (adv && adv->timeout) { + u16 duration = adv->timeout * MSEC_PER_SEC; + + /* Time = N * 10 ms */ + set->duration = cpu_to_le16(duration / 10); + } + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE, + sizeof(*cp) + + sizeof(*set) * cp->num_of_sets, + data, HCI_CMD_TIMEOUT); +} + +int hci_start_ext_adv_sync(struct hci_dev *hdev, u8 instance) +{ + int err; + + err = hci_setup_ext_adv_instance_sync(hdev, instance); + if (err) + return err; + + err = hci_set_ext_scan_rsp_data_sync(hdev, instance); + if (err) + return err; + + return hci_enable_ext_advertising_sync(hdev, instance); +} + +static int hci_disable_per_advertising_sync(struct hci_dev *hdev, u8 instance) +{ + struct hci_cp_le_set_per_adv_enable cp; + + /* If periodic advertising already disabled there is nothing to do. */ + if (!hci_dev_test_flag(hdev, HCI_LE_PER_ADV)) + return 0; + + memset(&cp, 0, sizeof(cp)); + + cp.enable = 0x00; + cp.handle = instance; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_set_per_adv_params_sync(struct hci_dev *hdev, u8 instance, + u16 min_interval, u16 max_interval) +{ + struct hci_cp_le_set_per_adv_params cp; + + memset(&cp, 0, sizeof(cp)); + + if (!min_interval) + min_interval = DISCOV_LE_PER_ADV_INT_MIN; + + if (!max_interval) + max_interval = DISCOV_LE_PER_ADV_INT_MAX; + + cp.handle = instance; + cp.min_interval = cpu_to_le16(min_interval); + cp.max_interval = cpu_to_le16(max_interval); + cp.periodic_properties = 0x0000; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_set_per_adv_data_sync(struct hci_dev *hdev, u8 instance) +{ + struct { + struct hci_cp_le_set_per_adv_data cp; + u8 data[HCI_MAX_PER_AD_LENGTH]; + } pdu; + u8 len; + + memset(&pdu, 0, sizeof(pdu)); + + if (instance) { + struct adv_info *adv = hci_find_adv_instance(hdev, instance); + + if (!adv || !adv->periodic) + return 0; + } + + len = eir_create_per_adv_data(hdev, instance, pdu.data); + + pdu.cp.length = len; + pdu.cp.handle = instance; + pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_DATA, + sizeof(pdu.cp) + len, &pdu, + HCI_CMD_TIMEOUT); +} + +static int hci_enable_per_advertising_sync(struct hci_dev *hdev, u8 instance) +{ + struct hci_cp_le_set_per_adv_enable cp; + + /* If periodic advertising already enabled there is nothing to do. */ + if (hci_dev_test_flag(hdev, HCI_LE_PER_ADV)) + return 0; + + memset(&cp, 0, sizeof(cp)); + + cp.enable = 0x01; + cp.handle = instance; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +/* Checks if periodic advertising data contains a Basic Announcement and if it + * does generates a Broadcast ID and add Broadcast Announcement. + */ +static int hci_adv_bcast_annoucement(struct hci_dev *hdev, struct adv_info *adv) +{ + u8 bid[3]; + u8 ad[4 + 3]; + + /* Skip if NULL adv as instance 0x00 is used for general purpose + * advertising so it cannot used for the likes of Broadcast Announcement + * as it can be overwritten at any point. + */ + if (!adv) + return 0; + + /* Check if PA data doesn't contains a Basic Audio Announcement then + * there is nothing to do. + */ + if (!eir_get_service_data(adv->per_adv_data, adv->per_adv_data_len, + 0x1851, NULL)) + return 0; + + /* Check if advertising data already has a Broadcast Announcement since + * the process may want to control the Broadcast ID directly and in that + * case the kernel shall no interfere. + */ + if (eir_get_service_data(adv->adv_data, adv->adv_data_len, 0x1852, + NULL)) + return 0; + + /* Generate Broadcast ID */ + get_random_bytes(bid, sizeof(bid)); + eir_append_service_data(ad, 0, 0x1852, bid, sizeof(bid)); + hci_set_adv_instance_data(hdev, adv->instance, sizeof(ad), ad, 0, NULL); + + return hci_update_adv_data_sync(hdev, adv->instance); +} + +int hci_start_per_adv_sync(struct hci_dev *hdev, u8 instance, u8 data_len, + u8 *data, u32 flags, u16 min_interval, + u16 max_interval, u16 sync_interval) +{ + struct adv_info *adv = NULL; + int err; + bool added = false; + + hci_disable_per_advertising_sync(hdev, instance); + + if (instance) { + adv = hci_find_adv_instance(hdev, instance); + /* Create an instance if that could not be found */ + if (!adv) { + adv = hci_add_per_instance(hdev, instance, flags, + data_len, data, + sync_interval, + sync_interval); + if (IS_ERR(adv)) + return PTR_ERR(adv); + added = true; + } + } + + /* Only start advertising if instance 0 or if a dedicated instance has + * been added. + */ + if (!adv || added) { + err = hci_start_ext_adv_sync(hdev, instance); + if (err < 0) + goto fail; + + err = hci_adv_bcast_annoucement(hdev, adv); + if (err < 0) + goto fail; + } + + err = hci_set_per_adv_params_sync(hdev, instance, min_interval, + max_interval); + if (err < 0) + goto fail; + + err = hci_set_per_adv_data_sync(hdev, instance); + if (err < 0) + goto fail; + + err = hci_enable_per_advertising_sync(hdev, instance); + if (err < 0) + goto fail; + + return 0; + +fail: + if (added) + hci_remove_adv_instance(hdev, instance); + + return err; +} + +static int hci_start_adv_sync(struct hci_dev *hdev, u8 instance) +{ + int err; + + if (ext_adv_capable(hdev)) + return hci_start_ext_adv_sync(hdev, instance); + + err = hci_update_adv_data_sync(hdev, instance); + if (err) + return err; + + err = hci_update_scan_rsp_data_sync(hdev, instance); + if (err) + return err; + + return hci_enable_advertising_sync(hdev); +} + +int hci_enable_advertising_sync(struct hci_dev *hdev) +{ + struct adv_info *adv_instance; + struct hci_cp_le_set_adv_param cp; + u8 own_addr_type, enable = 0x01; + bool connectable; + u16 adv_min_interval, adv_max_interval; + u32 flags; + u8 status; + + if (ext_adv_capable(hdev)) + return hci_enable_ext_advertising_sync(hdev, + hdev->cur_adv_instance); + + flags = hci_adv_instance_flags(hdev, hdev->cur_adv_instance); + adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance); + + /* If the "connectable" instance flag was not set, then choose between + * ADV_IND and ADV_NONCONN_IND based on the global connectable setting. + */ + connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) || + mgmt_get_connectable(hdev); + + if (!is_advertising_allowed(hdev, connectable)) + return -EINVAL; + + status = hci_disable_advertising_sync(hdev); + if (status) + return status; + + /* Clear the HCI_LE_ADV bit temporarily so that the + * hci_update_random_address knows that it's safe to go ahead + * and write a new random address. The flag will be set back on + * as soon as the SET_ADV_ENABLE HCI command completes. + */ + hci_dev_clear_flag(hdev, HCI_LE_ADV); + + /* Set require_privacy to true only when non-connectable + * advertising is used. In that case it is fine to use a + * non-resolvable private address. + */ + status = hci_update_random_address_sync(hdev, !connectable, + adv_use_rpa(hdev, flags), + &own_addr_type); + if (status) + return status; + + memset(&cp, 0, sizeof(cp)); + + if (adv_instance) { + adv_min_interval = adv_instance->min_interval; + adv_max_interval = adv_instance->max_interval; + } else { + adv_min_interval = hdev->le_adv_min_interval; + adv_max_interval = hdev->le_adv_max_interval; + } + + if (connectable) { + cp.type = LE_ADV_IND; + } else { + if (hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance)) + cp.type = LE_ADV_SCAN_IND; + else + cp.type = LE_ADV_NONCONN_IND; + + if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE) || + hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) { + adv_min_interval = DISCOV_LE_FAST_ADV_INT_MIN; + adv_max_interval = DISCOV_LE_FAST_ADV_INT_MAX; + } + } + + cp.min_interval = cpu_to_le16(adv_min_interval); + cp.max_interval = cpu_to_le16(adv_max_interval); + cp.own_address_type = own_addr_type; + cp.channel_map = hdev->le_adv_channel_map; + + status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); + if (status) + return status; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE, + sizeof(enable), &enable, HCI_CMD_TIMEOUT); +} + +static int enable_advertising_sync(struct hci_dev *hdev, void *data) +{ + return hci_enable_advertising_sync(hdev); +} + +int hci_enable_advertising(struct hci_dev *hdev) +{ + if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) && + list_empty(&hdev->adv_instances)) + return 0; + + return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL); +} + +int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance, + struct sock *sk) +{ + int err; + + if (!ext_adv_capable(hdev)) + return 0; + + err = hci_disable_ext_adv_instance_sync(hdev, instance); + if (err) + return err; + + /* If request specifies an instance that doesn't exist, fail */ + if (instance > 0 && !hci_find_adv_instance(hdev, instance)) + return -EINVAL; + + return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_REMOVE_ADV_SET, + sizeof(instance), &instance, 0, + HCI_CMD_TIMEOUT, sk); +} + +static int remove_ext_adv_sync(struct hci_dev *hdev, void *data) +{ + struct adv_info *adv = data; + u8 instance = 0; + + if (adv) + instance = adv->instance; + + return hci_remove_ext_adv_instance_sync(hdev, instance, NULL); +} + +int hci_remove_ext_adv_instance(struct hci_dev *hdev, u8 instance) +{ + struct adv_info *adv = NULL; + + if (instance) { + adv = hci_find_adv_instance(hdev, instance); + if (!adv) + return -EINVAL; + } + + return hci_cmd_sync_queue(hdev, remove_ext_adv_sync, adv, NULL); +} + +int hci_le_terminate_big_sync(struct hci_dev *hdev, u8 handle, u8 reason) +{ + struct hci_cp_le_term_big cp; + + memset(&cp, 0, sizeof(cp)); + cp.handle = handle; + cp.reason = reason; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_TERM_BIG, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_set_ext_adv_data_sync(struct hci_dev *hdev, u8 instance) +{ + struct { + struct hci_cp_le_set_ext_adv_data cp; + u8 data[HCI_MAX_EXT_AD_LENGTH]; + } pdu; + u8 len; + struct adv_info *adv = NULL; + int err; + + memset(&pdu, 0, sizeof(pdu)); + + if (instance) { + adv = hci_find_adv_instance(hdev, instance); + if (!adv || !adv->adv_data_changed) + return 0; + } + + len = eir_create_adv_data(hdev, instance, pdu.data); + + pdu.cp.length = len; + pdu.cp.handle = instance; + pdu.cp.operation = LE_SET_ADV_DATA_OP_COMPLETE; + pdu.cp.frag_pref = LE_SET_ADV_DATA_NO_FRAG; + + err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_DATA, + sizeof(pdu.cp) + len, &pdu.cp, + HCI_CMD_TIMEOUT); + if (err) + return err; + + /* Update data if the command succeed */ + if (adv) { + adv->adv_data_changed = false; + } else { + memcpy(hdev->adv_data, pdu.data, len); + hdev->adv_data_len = len; + } + + return 0; +} + +static int hci_set_adv_data_sync(struct hci_dev *hdev, u8 instance) +{ + struct hci_cp_le_set_adv_data cp; + u8 len; + + memset(&cp, 0, sizeof(cp)); + + len = eir_create_adv_data(hdev, instance, cp.data); + + /* There's nothing to do if the data hasn't changed */ + if (hdev->adv_data_len == len && + memcmp(cp.data, hdev->adv_data, len) == 0) + return 0; + + memcpy(hdev->adv_data, cp.data, sizeof(cp.data)); + hdev->adv_data_len = len; + + cp.length = len; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_DATA, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_update_adv_data_sync(struct hci_dev *hdev, u8 instance) +{ + if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) + return 0; + + if (ext_adv_capable(hdev)) + return hci_set_ext_adv_data_sync(hdev, instance); + + return hci_set_adv_data_sync(hdev, instance); +} + +int hci_schedule_adv_instance_sync(struct hci_dev *hdev, u8 instance, + bool force) +{ + struct adv_info *adv = NULL; + u16 timeout; + + if (hci_dev_test_flag(hdev, HCI_ADVERTISING) && !ext_adv_capable(hdev)) + return -EPERM; + + if (hdev->adv_instance_timeout) + return -EBUSY; + + adv = hci_find_adv_instance(hdev, instance); + if (!adv) + return -ENOENT; + + /* A zero timeout means unlimited advertising. As long as there is + * only one instance, duration should be ignored. We still set a timeout + * in case further instances are being added later on. + * + * If the remaining lifetime of the instance is more than the duration + * then the timeout corresponds to the duration, otherwise it will be + * reduced to the remaining instance lifetime. + */ + if (adv->timeout == 0 || adv->duration <= adv->remaining_time) + timeout = adv->duration; + else + timeout = adv->remaining_time; + + /* The remaining time is being reduced unless the instance is being + * advertised without time limit. + */ + if (adv->timeout) + adv->remaining_time = adv->remaining_time - timeout; + + /* Only use work for scheduling instances with legacy advertising */ + if (!ext_adv_capable(hdev)) { + hdev->adv_instance_timeout = timeout; + queue_delayed_work(hdev->req_workqueue, + &hdev->adv_instance_expire, + msecs_to_jiffies(timeout * 1000)); + } + + /* If we're just re-scheduling the same instance again then do not + * execute any HCI commands. This happens when a single instance is + * being advertised. + */ + if (!force && hdev->cur_adv_instance == instance && + hci_dev_test_flag(hdev, HCI_LE_ADV)) + return 0; + + hdev->cur_adv_instance = instance; + + return hci_start_adv_sync(hdev, instance); +} + +static int hci_clear_adv_sets_sync(struct hci_dev *hdev, struct sock *sk) +{ + int err; + + if (!ext_adv_capable(hdev)) + return 0; + + /* Disable instance 0x00 to disable all instances */ + err = hci_disable_ext_adv_instance_sync(hdev, 0x00); + if (err) + return err; + + return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CLEAR_ADV_SETS, + 0, NULL, 0, HCI_CMD_TIMEOUT, sk); +} + +static int hci_clear_adv_sync(struct hci_dev *hdev, struct sock *sk, bool force) +{ + struct adv_info *adv, *n; + int err = 0; + + if (ext_adv_capable(hdev)) + /* Remove all existing sets */ + err = hci_clear_adv_sets_sync(hdev, sk); + if (ext_adv_capable(hdev)) + return err; + + /* This is safe as long as there is no command send while the lock is + * held. + */ + hci_dev_lock(hdev); + + /* Cleanup non-ext instances */ + list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) { + u8 instance = adv->instance; + int err; + + if (!(force || adv->timeout)) + continue; + + err = hci_remove_adv_instance(hdev, instance); + if (!err) + mgmt_advertising_removed(sk, hdev, instance); + } + + hci_dev_unlock(hdev); + + return 0; +} + +static int hci_remove_adv_sync(struct hci_dev *hdev, u8 instance, + struct sock *sk) +{ + int err = 0; + + /* If we use extended advertising, instance has to be removed first. */ + if (ext_adv_capable(hdev)) + err = hci_remove_ext_adv_instance_sync(hdev, instance, sk); + if (ext_adv_capable(hdev)) + return err; + + /* This is safe as long as there is no command send while the lock is + * held. + */ + hci_dev_lock(hdev); + + err = hci_remove_adv_instance(hdev, instance); + if (!err) + mgmt_advertising_removed(sk, hdev, instance); + + hci_dev_unlock(hdev); + + return err; +} + +/* For a single instance: + * - force == true: The instance will be removed even when its remaining + * lifetime is not zero. + * - force == false: the instance will be deactivated but kept stored unless + * the remaining lifetime is zero. + * + * For instance == 0x00: + * - force == true: All instances will be removed regardless of their timeout + * setting. + * - force == false: Only instances that have a timeout will be removed. + */ +int hci_remove_advertising_sync(struct hci_dev *hdev, struct sock *sk, + u8 instance, bool force) +{ + struct adv_info *next = NULL; + int err; + + /* Cancel any timeout concerning the removed instance(s). */ + if (!instance || hdev->cur_adv_instance == instance) + cancel_adv_timeout(hdev); + + /* Get the next instance to advertise BEFORE we remove + * the current one. This can be the same instance again + * if there is only one instance. + */ + if (hdev->cur_adv_instance == instance) + next = hci_get_next_instance(hdev, instance); + + if (!instance) { + err = hci_clear_adv_sync(hdev, sk, force); + if (err) + return err; + } else { + struct adv_info *adv = hci_find_adv_instance(hdev, instance); + + if (force || (adv && adv->timeout && !adv->remaining_time)) { + /* Don't advertise a removed instance. */ + if (next && next->instance == instance) + next = NULL; + + err = hci_remove_adv_sync(hdev, instance, sk); + if (err) + return err; + } + } + + if (!hdev_is_powered(hdev) || hci_dev_test_flag(hdev, HCI_ADVERTISING)) + return 0; + + if (next && !ext_adv_capable(hdev)) + hci_schedule_adv_instance_sync(hdev, next->instance, false); + + return 0; +} + +int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle) +{ + struct hci_cp_read_rssi cp; + + cp.handle = handle; + return __hci_cmd_sync_status(hdev, HCI_OP_READ_RSSI, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK, + sizeof(*cp), cp, HCI_CMD_TIMEOUT); +} + +int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type) +{ + struct hci_cp_read_tx_power cp; + + cp.handle = handle; + cp.type = type; + return __hci_cmd_sync_status(hdev, HCI_OP_READ_TX_POWER, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_disable_advertising_sync(struct hci_dev *hdev) +{ + u8 enable = 0x00; + int err = 0; + + /* If controller is not advertising we are done. */ + if (!hci_dev_test_flag(hdev, HCI_LE_ADV)) + return 0; + + if (ext_adv_capable(hdev)) + err = hci_disable_ext_adv_instance_sync(hdev, 0x00); + if (ext_adv_capable(hdev)) + return err; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE, + sizeof(enable), &enable, HCI_CMD_TIMEOUT); +} + +static int hci_le_set_ext_scan_enable_sync(struct hci_dev *hdev, u8 val, + u8 filter_dup) +{ + struct hci_cp_le_set_ext_scan_enable cp; + + memset(&cp, 0, sizeof(cp)); + cp.enable = val; + + if (hci_dev_test_flag(hdev, HCI_MESH)) + cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE; + else + cp.filter_dup = filter_dup; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_le_set_scan_enable_sync(struct hci_dev *hdev, u8 val, + u8 filter_dup) +{ + struct hci_cp_le_set_scan_enable cp; + + if (use_ext_scan(hdev)) + return hci_le_set_ext_scan_enable_sync(hdev, val, filter_dup); + + memset(&cp, 0, sizeof(cp)); + cp.enable = val; + + if (val && hci_dev_test_flag(hdev, HCI_MESH)) + cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE; + else + cp.filter_dup = filter_dup; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_ENABLE, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_le_set_addr_resolution_enable_sync(struct hci_dev *hdev, u8 val) +{ + if (!use_ll_privacy(hdev)) + return 0; + + /* If controller is not/already resolving we are done. */ + if (val == hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, + sizeof(val), &val, HCI_CMD_TIMEOUT); +} + +static int hci_scan_disable_sync(struct hci_dev *hdev) +{ + int err; + + /* If controller is not scanning we are done. */ + if (!hci_dev_test_flag(hdev, HCI_LE_SCAN)) + return 0; + + if (hdev->scanning_paused) { + bt_dev_dbg(hdev, "Scanning is paused for suspend"); + return 0; + } + + err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00); + if (err) { + bt_dev_err(hdev, "Unable to disable scanning: %d", err); + return err; + } + + return err; +} + +static bool scan_use_rpa(struct hci_dev *hdev) +{ + return hci_dev_test_flag(hdev, HCI_PRIVACY); +} + +static void hci_start_interleave_scan(struct hci_dev *hdev) +{ + hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER; + queue_delayed_work(hdev->req_workqueue, + &hdev->interleave_scan, 0); +} + +static bool is_interleave_scanning(struct hci_dev *hdev) +{ + return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE; +} + +static void cancel_interleave_scan(struct hci_dev *hdev) +{ + bt_dev_dbg(hdev, "cancelling interleave scan"); + + cancel_delayed_work_sync(&hdev->interleave_scan); + + hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE; +} + +/* Return true if interleave_scan wasn't started until exiting this function, + * otherwise, return false + */ +static bool hci_update_interleaved_scan_sync(struct hci_dev *hdev) +{ + /* Do interleaved scan only if all of the following are true: + * - There is at least one ADV monitor + * - At least one pending LE connection or one device to be scanned for + * - Monitor offloading is not supported + * If so, we should alternate between allowlist scan and one without + * any filters to save power. + */ + bool use_interleaving = hci_is_adv_monitoring(hdev) && + !(list_empty(&hdev->pend_le_conns) && + list_empty(&hdev->pend_le_reports)) && + hci_get_adv_monitor_offload_ext(hdev) == + HCI_ADV_MONITOR_EXT_NONE; + bool is_interleaving = is_interleave_scanning(hdev); + + if (use_interleaving && !is_interleaving) { + hci_start_interleave_scan(hdev); + bt_dev_dbg(hdev, "starting interleave scan"); + return true; + } + + if (!use_interleaving && is_interleaving) + cancel_interleave_scan(hdev); + + return false; +} + +/* Removes connection to resolve list if needed.*/ +static int hci_le_del_resolve_list_sync(struct hci_dev *hdev, + bdaddr_t *bdaddr, u8 bdaddr_type) +{ + struct hci_cp_le_del_from_resolv_list cp; + struct bdaddr_list_with_irk *entry; + + if (!use_ll_privacy(hdev)) + return 0; + + /* Check if the IRK has been programmed */ + entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, bdaddr, + bdaddr_type); + if (!entry) + return 0; + + cp.bdaddr_type = bdaddr_type; + bacpy(&cp.bdaddr, bdaddr); + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_le_del_accept_list_sync(struct hci_dev *hdev, + bdaddr_t *bdaddr, u8 bdaddr_type) +{ + struct hci_cp_le_del_from_accept_list cp; + int err; + + /* Check if device is on accept list before removing it */ + if (!hci_bdaddr_list_lookup(&hdev->le_accept_list, bdaddr, bdaddr_type)) + return 0; + + cp.bdaddr_type = bdaddr_type; + bacpy(&cp.bdaddr, bdaddr); + + /* Ignore errors when removing from resolving list as that is likely + * that the device was never added. + */ + hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type); + + err = __hci_cmd_sync_status(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); + if (err) { + bt_dev_err(hdev, "Unable to remove from allow list: %d", err); + return err; + } + + bt_dev_dbg(hdev, "Remove %pMR (0x%x) from allow list", &cp.bdaddr, + cp.bdaddr_type); + + return 0; +} + +struct conn_params { + bdaddr_t addr; + u8 addr_type; + hci_conn_flags_t flags; + u8 privacy_mode; +}; + +/* Adds connection to resolve list if needed. + * Setting params to NULL programs local hdev->irk + */ +static int hci_le_add_resolve_list_sync(struct hci_dev *hdev, + struct conn_params *params) +{ + struct hci_cp_le_add_to_resolv_list cp; + struct smp_irk *irk; + struct bdaddr_list_with_irk *entry; + struct hci_conn_params *p; + + if (!use_ll_privacy(hdev)) + return 0; + + /* Attempt to program local identity address, type and irk if params is + * NULL. + */ + if (!params) { + if (!hci_dev_test_flag(hdev, HCI_PRIVACY)) + return 0; + + hci_copy_identity_address(hdev, &cp.bdaddr, &cp.bdaddr_type); + memcpy(cp.peer_irk, hdev->irk, 16); + goto done; + } + + irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type); + if (!irk) + return 0; + + /* Check if the IK has _not_ been programmed yet. */ + entry = hci_bdaddr_list_lookup_with_irk(&hdev->le_resolv_list, + ¶ms->addr, + params->addr_type); + if (entry) + return 0; + + cp.bdaddr_type = params->addr_type; + bacpy(&cp.bdaddr, ¶ms->addr); + memcpy(cp.peer_irk, irk->val, 16); + + /* Default privacy mode is always Network */ + params->privacy_mode = HCI_NETWORK_PRIVACY; + + rcu_read_lock(); + p = hci_pend_le_action_lookup(&hdev->pend_le_conns, + ¶ms->addr, params->addr_type); + if (!p) + p = hci_pend_le_action_lookup(&hdev->pend_le_reports, + ¶ms->addr, params->addr_type); + if (p) + WRITE_ONCE(p->privacy_mode, HCI_NETWORK_PRIVACY); + rcu_read_unlock(); + +done: + if (hci_dev_test_flag(hdev, HCI_PRIVACY)) + memcpy(cp.local_irk, hdev->irk, 16); + else + memset(cp.local_irk, 0, 16); + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +/* Set Device Privacy Mode. */ +static int hci_le_set_privacy_mode_sync(struct hci_dev *hdev, + struct conn_params *params) +{ + struct hci_cp_le_set_privacy_mode cp; + struct smp_irk *irk; + + /* If device privacy mode has already been set there is nothing to do */ + if (params->privacy_mode == HCI_DEVICE_PRIVACY) + return 0; + + /* Check if HCI_CONN_FLAG_DEVICE_PRIVACY has been set as it also + * indicates that LL Privacy has been enabled and + * HCI_OP_LE_SET_PRIVACY_MODE is supported. + */ + if (!(params->flags & HCI_CONN_FLAG_DEVICE_PRIVACY)) + return 0; + + irk = hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type); + if (!irk) + return 0; + + memset(&cp, 0, sizeof(cp)); + cp.bdaddr_type = irk->addr_type; + bacpy(&cp.bdaddr, &irk->bdaddr); + cp.mode = HCI_DEVICE_PRIVACY; + + /* Note: params->privacy_mode is not updated since it is a copy */ + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_PRIVACY_MODE, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +/* Adds connection to allow list if needed, if the device uses RPA (has IRK) + * this attempts to program the device in the resolving list as well and + * properly set the privacy mode. + */ +static int hci_le_add_accept_list_sync(struct hci_dev *hdev, + struct conn_params *params, + u8 *num_entries) +{ + struct hci_cp_le_add_to_accept_list cp; + int err; + + /* During suspend, only wakeable devices can be in acceptlist */ + if (hdev->suspended && + !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) + return 0; + + /* Select filter policy to accept all advertising */ + if (*num_entries >= hdev->le_accept_list_size) + return -ENOSPC; + + /* Accept list can not be used with RPAs */ + if (!use_ll_privacy(hdev) && + hci_find_irk_by_addr(hdev, ¶ms->addr, params->addr_type)) + return -EINVAL; + + /* Attempt to program the device in the resolving list first to avoid + * having to rollback in case it fails since the resolving list is + * dynamic it can probably be smaller than the accept list. + */ + err = hci_le_add_resolve_list_sync(hdev, params); + if (err) { + bt_dev_err(hdev, "Unable to add to resolve list: %d", err); + return err; + } + + /* Set Privacy Mode */ + err = hci_le_set_privacy_mode_sync(hdev, params); + if (err) { + bt_dev_err(hdev, "Unable to set privacy mode: %d", err); + return err; + } + + /* Check if already in accept list */ + if (hci_bdaddr_list_lookup(&hdev->le_accept_list, ¶ms->addr, + params->addr_type)) + return 0; + + *num_entries += 1; + cp.bdaddr_type = params->addr_type; + bacpy(&cp.bdaddr, ¶ms->addr); + + err = __hci_cmd_sync_status(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); + if (err) { + bt_dev_err(hdev, "Unable to add to allow list: %d", err); + /* Rollback the device from the resolving list */ + hci_le_del_resolve_list_sync(hdev, &cp.bdaddr, cp.bdaddr_type); + return err; + } + + bt_dev_dbg(hdev, "Add %pMR (0x%x) to allow list", &cp.bdaddr, + cp.bdaddr_type); + + return 0; +} + +/* This function disables/pause all advertising instances */ +static int hci_pause_advertising_sync(struct hci_dev *hdev) +{ + int err; + int old_state; + + /* If already been paused there is nothing to do. */ + if (hdev->advertising_paused) + return 0; + + bt_dev_dbg(hdev, "Pausing directed advertising"); + + /* Stop directed advertising */ + old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING); + if (old_state) { + /* When discoverable timeout triggers, then just make sure + * the limited discoverable flag is cleared. Even in the case + * of a timeout triggered from general discoverable, it is + * safe to unconditionally clear the flag. + */ + hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE); + hci_dev_clear_flag(hdev, HCI_DISCOVERABLE); + hdev->discov_timeout = 0; + } + + bt_dev_dbg(hdev, "Pausing advertising instances"); + + /* Call to disable any advertisements active on the controller. + * This will succeed even if no advertisements are configured. + */ + err = hci_disable_advertising_sync(hdev); + if (err) + return err; + + /* If we are using software rotation, pause the loop */ + if (!ext_adv_capable(hdev)) + cancel_adv_timeout(hdev); + + hdev->advertising_paused = true; + hdev->advertising_old_state = old_state; + + return 0; +} + +/* This function enables all user advertising instances */ +static int hci_resume_advertising_sync(struct hci_dev *hdev) +{ + struct adv_info *adv, *tmp; + int err; + + /* If advertising has not been paused there is nothing to do. */ + if (!hdev->advertising_paused) + return 0; + + /* Resume directed advertising */ + hdev->advertising_paused = false; + if (hdev->advertising_old_state) { + hci_dev_set_flag(hdev, HCI_ADVERTISING); + hdev->advertising_old_state = 0; + } + + bt_dev_dbg(hdev, "Resuming advertising instances"); + + if (ext_adv_capable(hdev)) { + /* Call for each tracked instance to be re-enabled */ + list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) { + err = hci_enable_ext_advertising_sync(hdev, + adv->instance); + if (!err) + continue; + + /* If the instance cannot be resumed remove it */ + hci_remove_ext_adv_instance_sync(hdev, adv->instance, + NULL); + } + } else { + /* Schedule for most recent instance to be restarted and begin + * the software rotation loop + */ + err = hci_schedule_adv_instance_sync(hdev, + hdev->cur_adv_instance, + true); + } + + hdev->advertising_paused = false; + + return err; +} + +static int hci_pause_addr_resolution(struct hci_dev *hdev) +{ + int err; + + if (!use_ll_privacy(hdev)) + return 0; + + if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) + return 0; + + /* Cannot disable addr resolution if scanning is enabled or + * when initiating an LE connection. + */ + if (hci_dev_test_flag(hdev, HCI_LE_SCAN) || + hci_lookup_le_connect(hdev)) { + bt_dev_err(hdev, "Command not allowed when scan/LE connect"); + return -EPERM; + } + + /* Cannot disable addr resolution if advertising is enabled. */ + err = hci_pause_advertising_sync(hdev); + if (err) { + bt_dev_err(hdev, "Pause advertising failed: %d", err); + return err; + } + + err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00); + if (err) + bt_dev_err(hdev, "Unable to disable Address Resolution: %d", + err); + + /* Return if address resolution is disabled and RPA is not used. */ + if (!err && scan_use_rpa(hdev)) + return err; + + hci_resume_advertising_sync(hdev); + return err; +} + +struct sk_buff *hci_read_local_oob_data_sync(struct hci_dev *hdev, + bool extended, struct sock *sk) +{ + u16 opcode = extended ? HCI_OP_READ_LOCAL_OOB_EXT_DATA : + HCI_OP_READ_LOCAL_OOB_DATA; + + return __hci_cmd_sync_sk(hdev, opcode, 0, NULL, 0, HCI_CMD_TIMEOUT, sk); +} + +static struct conn_params *conn_params_copy(struct list_head *list, size_t *n) +{ + struct hci_conn_params *params; + struct conn_params *p; + size_t i; + + rcu_read_lock(); + + i = 0; + list_for_each_entry_rcu(params, list, action) + ++i; + *n = i; + + rcu_read_unlock(); + + p = kvcalloc(*n, sizeof(struct conn_params), GFP_KERNEL); + if (!p) + return NULL; + + rcu_read_lock(); + + i = 0; + list_for_each_entry_rcu(params, list, action) { + /* Racing adds are handled in next scan update */ + if (i >= *n) + break; + + /* No hdev->lock, but: addr, addr_type are immutable. + * privacy_mode is only written by us or in + * hci_cc_le_set_privacy_mode that we wait for. + * We should be idempotent so MGMT updating flags + * while we are processing is OK. + */ + bacpy(&p[i].addr, ¶ms->addr); + p[i].addr_type = params->addr_type; + p[i].flags = READ_ONCE(params->flags); + p[i].privacy_mode = READ_ONCE(params->privacy_mode); + ++i; + } + + rcu_read_unlock(); + + *n = i; + return p; +} + +/* Device must not be scanning when updating the accept list. + * + * Update is done using the following sequence: + * + * use_ll_privacy((Disable Advertising) -> Disable Resolving List) -> + * Remove Devices From Accept List -> + * (has IRK && use_ll_privacy(Remove Devices From Resolving List))-> + * Add Devices to Accept List -> + * (has IRK && use_ll_privacy(Remove Devices From Resolving List)) -> + * use_ll_privacy(Enable Resolving List -> (Enable Advertising)) -> + * Enable Scanning + * + * In case of failure advertising shall be restored to its original state and + * return would disable accept list since either accept or resolving list could + * not be programmed. + * + */ +static u8 hci_update_accept_list_sync(struct hci_dev *hdev) +{ + struct conn_params *params; + struct bdaddr_list *b, *t; + u8 num_entries = 0; + bool pend_conn, pend_report; + u8 filter_policy; + size_t i, n; + int err; + + /* Pause advertising if resolving list can be used as controllers + * cannot accept resolving list modifications while advertising. + */ + if (use_ll_privacy(hdev)) { + err = hci_pause_advertising_sync(hdev); + if (err) { + bt_dev_err(hdev, "pause advertising failed: %d", err); + return 0x00; + } + } + + /* Disable address resolution while reprogramming accept list since + * devices that do have an IRK will be programmed in the resolving list + * when LL Privacy is enabled. + */ + err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00); + if (err) { + bt_dev_err(hdev, "Unable to disable LL privacy: %d", err); + goto done; + } + + /* Go through the current accept list programmed into the + * controller one by one and check if that address is connected or is + * still in the list of pending connections or list of devices to + * report. If not present in either list, then remove it from + * the controller. + */ + list_for_each_entry_safe(b, t, &hdev->le_accept_list, list) { + if (hci_conn_hash_lookup_le(hdev, &b->bdaddr, b->bdaddr_type)) + continue; + + /* Pointers not dereferenced, no locks needed */ + pend_conn = hci_pend_le_action_lookup(&hdev->pend_le_conns, + &b->bdaddr, + b->bdaddr_type); + pend_report = hci_pend_le_action_lookup(&hdev->pend_le_reports, + &b->bdaddr, + b->bdaddr_type); + + /* If the device is not likely to connect or report, + * remove it from the acceptlist. + */ + if (!pend_conn && !pend_report) { + hci_le_del_accept_list_sync(hdev, &b->bdaddr, + b->bdaddr_type); + continue; + } + + num_entries++; + } + + /* Since all no longer valid accept list entries have been + * removed, walk through the list of pending connections + * and ensure that any new device gets programmed into + * the controller. + * + * If the list of the devices is larger than the list of + * available accept list entries in the controller, then + * just abort and return filer policy value to not use the + * accept list. + * + * The list and params may be mutated while we wait for events, + * so make a copy and iterate it. + */ + + params = conn_params_copy(&hdev->pend_le_conns, &n); + if (!params) { + err = -ENOMEM; + goto done; + } + + for (i = 0; i < n; ++i) { + err = hci_le_add_accept_list_sync(hdev, ¶ms[i], + &num_entries); + if (err) { + kvfree(params); + goto done; + } + } + + kvfree(params); + + /* After adding all new pending connections, walk through + * the list of pending reports and also add these to the + * accept list if there is still space. Abort if space runs out. + */ + + params = conn_params_copy(&hdev->pend_le_reports, &n); + if (!params) { + err = -ENOMEM; + goto done; + } + + for (i = 0; i < n; ++i) { + err = hci_le_add_accept_list_sync(hdev, ¶ms[i], + &num_entries); + if (err) { + kvfree(params); + goto done; + } + } + + kvfree(params); + + /* Use the allowlist unless the following conditions are all true: + * - We are not currently suspending + * - There are 1 or more ADV monitors registered and it's not offloaded + * - Interleaved scanning is not currently using the allowlist + */ + if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended && + hci_get_adv_monitor_offload_ext(hdev) == HCI_ADV_MONITOR_EXT_NONE && + hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST) + err = -EINVAL; + +done: + filter_policy = err ? 0x00 : 0x01; + + /* Enable address resolution when LL Privacy is enabled. */ + err = hci_le_set_addr_resolution_enable_sync(hdev, 0x01); + if (err) + bt_dev_err(hdev, "Unable to enable LL privacy: %d", err); + + /* Resume advertising if it was paused */ + if (use_ll_privacy(hdev)) + hci_resume_advertising_sync(hdev); + + /* Select filter policy to use accept list */ + return filter_policy; +} + +/* Returns true if an le connection is in the scanning state */ +static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev) +{ + struct hci_conn_hash *h = &hdev->conn_hash; + struct hci_conn *c; + + rcu_read_lock(); + + list_for_each_entry_rcu(c, &h->list, list) { + if (c->type == LE_LINK && c->state == BT_CONNECT && + test_bit(HCI_CONN_SCANNING, &c->flags)) { + rcu_read_unlock(); + return true; + } + } + + rcu_read_unlock(); + + return false; +} + +static int hci_le_set_ext_scan_param_sync(struct hci_dev *hdev, u8 type, + u16 interval, u16 window, + u8 own_addr_type, u8 filter_policy) +{ + struct hci_cp_le_set_ext_scan_params *cp; + struct hci_cp_le_scan_phy_params *phy; + u8 data[sizeof(*cp) + sizeof(*phy) * 2]; + u8 num_phy = 0; + + cp = (void *)data; + phy = (void *)cp->data; + + memset(data, 0, sizeof(data)); + + cp->own_addr_type = own_addr_type; + cp->filter_policy = filter_policy; + + if (scan_1m(hdev) || scan_2m(hdev)) { + cp->scanning_phys |= LE_SCAN_PHY_1M; + + phy->type = type; + phy->interval = cpu_to_le16(interval); + phy->window = cpu_to_le16(window); + + num_phy++; + phy++; + } + + if (scan_coded(hdev)) { + cp->scanning_phys |= LE_SCAN_PHY_CODED; + + phy->type = type; + phy->interval = cpu_to_le16(interval); + phy->window = cpu_to_le16(window); + + num_phy++; + phy++; + } + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS, + sizeof(*cp) + sizeof(*phy) * num_phy, + data, HCI_CMD_TIMEOUT); +} + +static int hci_le_set_scan_param_sync(struct hci_dev *hdev, u8 type, + u16 interval, u16 window, + u8 own_addr_type, u8 filter_policy) +{ + struct hci_cp_le_set_scan_param cp; + + if (use_ext_scan(hdev)) + return hci_le_set_ext_scan_param_sync(hdev, type, interval, + window, own_addr_type, + filter_policy); + + memset(&cp, 0, sizeof(cp)); + cp.type = type; + cp.interval = cpu_to_le16(interval); + cp.window = cpu_to_le16(window); + cp.own_address_type = own_addr_type; + cp.filter_policy = filter_policy; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_SCAN_PARAM, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval, + u16 window, u8 own_addr_type, u8 filter_policy, + u8 filter_dup) +{ + int err; + + if (hdev->scanning_paused) { + bt_dev_dbg(hdev, "Scanning is paused for suspend"); + return 0; + } + + err = hci_le_set_scan_param_sync(hdev, type, interval, window, + own_addr_type, filter_policy); + if (err) + return err; + + return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup); +} + +static int hci_passive_scan_sync(struct hci_dev *hdev) +{ + u8 own_addr_type; + u8 filter_policy; + u16 window, interval; + u8 filter_dups = LE_SCAN_FILTER_DUP_ENABLE; + int err; + + if (hdev->scanning_paused) { + bt_dev_dbg(hdev, "Scanning is paused for suspend"); + return 0; + } + + err = hci_scan_disable_sync(hdev); + if (err) { + bt_dev_err(hdev, "disable scanning failed: %d", err); + return err; + } + + /* Set require_privacy to false since no SCAN_REQ are send + * during passive scanning. Not using an non-resolvable address + * here is important so that peer devices using direct + * advertising with our address will be correctly reported + * by the controller. + */ + if (hci_update_random_address_sync(hdev, false, scan_use_rpa(hdev), + &own_addr_type)) + return 0; + + if (hdev->enable_advmon_interleave_scan && + hci_update_interleaved_scan_sync(hdev)) + return 0; + + bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state); + + /* Adding or removing entries from the accept list must + * happen before enabling scanning. The controller does + * not allow accept list modification while scanning. + */ + filter_policy = hci_update_accept_list_sync(hdev); + + /* When the controller is using random resolvable addresses and + * with that having LE privacy enabled, then controllers with + * Extended Scanner Filter Policies support can now enable support + * for handling directed advertising. + * + * So instead of using filter polices 0x00 (no acceptlist) + * and 0x01 (acceptlist enabled) use the new filter policies + * 0x02 (no acceptlist) and 0x03 (acceptlist enabled). + */ + if (hci_dev_test_flag(hdev, HCI_PRIVACY) && + (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)) + filter_policy |= 0x02; + + if (hdev->suspended) { + window = hdev->le_scan_window_suspend; + interval = hdev->le_scan_int_suspend; + } else if (hci_is_le_conn_scanning(hdev)) { + window = hdev->le_scan_window_connect; + interval = hdev->le_scan_int_connect; + } else if (hci_is_adv_monitoring(hdev)) { + window = hdev->le_scan_window_adv_monitor; + interval = hdev->le_scan_int_adv_monitor; + } else { + window = hdev->le_scan_window; + interval = hdev->le_scan_interval; + } + + /* Disable all filtering for Mesh */ + if (hci_dev_test_flag(hdev, HCI_MESH)) { + filter_policy = 0; + filter_dups = LE_SCAN_FILTER_DUP_DISABLE; + } + + bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy); + + return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window, + own_addr_type, filter_policy, filter_dups); +} + +/* This function controls the passive scanning based on hdev->pend_le_conns + * list. If there are pending LE connection we start the background scanning, + * otherwise we stop it in the following sequence: + * + * If there are devices to scan: + * + * Disable Scanning -> Update Accept List -> + * use_ll_privacy((Disable Advertising) -> Disable Resolving List -> + * Update Resolving List -> Enable Resolving List -> (Enable Advertising)) -> + * Enable Scanning + * + * Otherwise: + * + * Disable Scanning + */ +int hci_update_passive_scan_sync(struct hci_dev *hdev) +{ + int err; + + if (!test_bit(HCI_UP, &hdev->flags) || + test_bit(HCI_INIT, &hdev->flags) || + hci_dev_test_flag(hdev, HCI_SETUP) || + hci_dev_test_flag(hdev, HCI_CONFIG) || + hci_dev_test_flag(hdev, HCI_AUTO_OFF) || + hci_dev_test_flag(hdev, HCI_UNREGISTER)) + return 0; + + /* No point in doing scanning if LE support hasn't been enabled */ + if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) + return 0; + + /* If discovery is active don't interfere with it */ + if (hdev->discovery.state != DISCOVERY_STOPPED) + return 0; + + /* Reset RSSI and UUID filters when starting background scanning + * since these filters are meant for service discovery only. + * + * The Start Discovery and Start Service Discovery operations + * ensure to set proper values for RSSI threshold and UUID + * filter list. So it is safe to just reset them here. + */ + hci_discovery_filter_clear(hdev); + + bt_dev_dbg(hdev, "ADV monitoring is %s", + hci_is_adv_monitoring(hdev) ? "on" : "off"); + + if (!hci_dev_test_flag(hdev, HCI_MESH) && + list_empty(&hdev->pend_le_conns) && + list_empty(&hdev->pend_le_reports) && + !hci_is_adv_monitoring(hdev) && + !hci_dev_test_flag(hdev, HCI_PA_SYNC)) { + /* If there is no pending LE connections or devices + * to be scanned for or no ADV monitors, we should stop the + * background scanning. + */ + + bt_dev_dbg(hdev, "stopping background scanning"); + + err = hci_scan_disable_sync(hdev); + if (err) + bt_dev_err(hdev, "stop background scanning failed: %d", + err); + } else { + /* If there is at least one pending LE connection, we should + * keep the background scan running. + */ + + /* If controller is connecting, we should not start scanning + * since some controllers are not able to scan and connect at + * the same time. + */ + if (hci_lookup_le_connect(hdev)) + return 0; + + bt_dev_dbg(hdev, "start background scanning"); + + err = hci_passive_scan_sync(hdev); + if (err) + bt_dev_err(hdev, "start background scanning failed: %d", + err); + } + + return err; +} + +static int update_scan_sync(struct hci_dev *hdev, void *data) +{ + return hci_update_scan_sync(hdev); +} + +int hci_update_scan(struct hci_dev *hdev) +{ + return hci_cmd_sync_queue(hdev, update_scan_sync, NULL, NULL); +} + +static int update_passive_scan_sync(struct hci_dev *hdev, void *data) +{ + return hci_update_passive_scan_sync(hdev); +} + +int hci_update_passive_scan(struct hci_dev *hdev) +{ + /* Only queue if it would have any effect */ + if (!test_bit(HCI_UP, &hdev->flags) || + test_bit(HCI_INIT, &hdev->flags) || + hci_dev_test_flag(hdev, HCI_SETUP) || + hci_dev_test_flag(hdev, HCI_CONFIG) || + hci_dev_test_flag(hdev, HCI_AUTO_OFF) || + hci_dev_test_flag(hdev, HCI_UNREGISTER)) + return 0; + + return hci_cmd_sync_queue(hdev, update_passive_scan_sync, NULL, NULL); +} + +int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val) +{ + int err; + + if (!bredr_sc_enabled(hdev) || lmp_host_sc_capable(hdev)) + return 0; + + err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT, + sizeof(val), &val, HCI_CMD_TIMEOUT); + + if (!err) { + if (val) { + hdev->features[1][0] |= LMP_HOST_SC; + hci_dev_set_flag(hdev, HCI_SC_ENABLED); + } else { + hdev->features[1][0] &= ~LMP_HOST_SC; + hci_dev_clear_flag(hdev, HCI_SC_ENABLED); + } + } + + return err; +} + +int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode) +{ + int err; + + if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) || + lmp_host_ssp_capable(hdev)) + return 0; + + if (!mode && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS)) { + __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE, + sizeof(mode), &mode, HCI_CMD_TIMEOUT); + } + + err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE, + sizeof(mode), &mode, HCI_CMD_TIMEOUT); + if (err) + return err; + + return hci_write_sc_support_sync(hdev, 0x01); +} + +int hci_write_le_host_supported_sync(struct hci_dev *hdev, u8 le, u8 simul) +{ + struct hci_cp_write_le_host_supported cp; + + if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) || + !lmp_bredr_capable(hdev)) + return 0; + + /* Check first if we already have the right host state + * (host features set) + */ + if (le == lmp_host_le_capable(hdev) && + simul == lmp_host_le_br_capable(hdev)) + return 0; + + memset(&cp, 0, sizeof(cp)); + + cp.le = le; + cp.simul = simul; + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_powered_update_adv_sync(struct hci_dev *hdev) +{ + struct adv_info *adv, *tmp; + int err; + + if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) + return 0; + + /* If RPA Resolution has not been enable yet it means the + * resolving list is empty and we should attempt to program the + * local IRK in order to support using own_addr_type + * ADDR_LE_DEV_RANDOM_RESOLVED (0x03). + */ + if (!hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) { + hci_le_add_resolve_list_sync(hdev, NULL); + hci_le_set_addr_resolution_enable_sync(hdev, 0x01); + } + + /* Make sure the controller has a good default for + * advertising data. This also applies to the case + * where BR/EDR was toggled during the AUTO_OFF phase. + */ + if (hci_dev_test_flag(hdev, HCI_ADVERTISING) || + list_empty(&hdev->adv_instances)) { + if (ext_adv_capable(hdev)) { + err = hci_setup_ext_adv_instance_sync(hdev, 0x00); + if (!err) + hci_update_scan_rsp_data_sync(hdev, 0x00); + } else { + err = hci_update_adv_data_sync(hdev, 0x00); + if (!err) + hci_update_scan_rsp_data_sync(hdev, 0x00); + } + + if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) + hci_enable_advertising_sync(hdev); + } + + /* Call for each tracked instance to be scheduled */ + list_for_each_entry_safe(adv, tmp, &hdev->adv_instances, list) + hci_schedule_adv_instance_sync(hdev, adv->instance, true); + + return 0; +} + +static int hci_write_auth_enable_sync(struct hci_dev *hdev) +{ + u8 link_sec; + + link_sec = hci_dev_test_flag(hdev, HCI_LINK_SECURITY); + if (link_sec == test_bit(HCI_AUTH, &hdev->flags)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE, + sizeof(link_sec), &link_sec, + HCI_CMD_TIMEOUT); +} + +int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable) +{ + struct hci_cp_write_page_scan_activity cp; + u8 type; + int err = 0; + + if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) + return 0; + + if (hdev->hci_ver < BLUETOOTH_VER_1_2) + return 0; + + memset(&cp, 0, sizeof(cp)); + + if (enable) { + type = PAGE_SCAN_TYPE_INTERLACED; + + /* 160 msec page scan interval */ + cp.interval = cpu_to_le16(0x0100); + } else { + type = hdev->def_page_scan_type; + cp.interval = cpu_to_le16(hdev->def_page_scan_int); + } + + cp.window = cpu_to_le16(hdev->def_page_scan_window); + + if (__cpu_to_le16(hdev->page_scan_interval) != cp.interval || + __cpu_to_le16(hdev->page_scan_window) != cp.window) { + err = __hci_cmd_sync_status(hdev, + HCI_OP_WRITE_PAGE_SCAN_ACTIVITY, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); + if (err) + return err; + } + + if (hdev->page_scan_type != type) + err = __hci_cmd_sync_status(hdev, + HCI_OP_WRITE_PAGE_SCAN_TYPE, + sizeof(type), &type, + HCI_CMD_TIMEOUT); + + return err; +} + +static bool disconnected_accept_list_entries(struct hci_dev *hdev) +{ + struct bdaddr_list *b; + + list_for_each_entry(b, &hdev->accept_list, list) { + struct hci_conn *conn; + + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr); + if (!conn) + return true; + + if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) + return true; + } + + return false; +} + +static int hci_write_scan_enable_sync(struct hci_dev *hdev, u8 val) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE, + sizeof(val), &val, + HCI_CMD_TIMEOUT); +} + +int hci_update_scan_sync(struct hci_dev *hdev) +{ + u8 scan; + + if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) + return 0; + + if (!hdev_is_powered(hdev)) + return 0; + + if (mgmt_powering_down(hdev)) + return 0; + + if (hdev->scanning_paused) + return 0; + + if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) || + disconnected_accept_list_entries(hdev)) + scan = SCAN_PAGE; + else + scan = SCAN_DISABLED; + + if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) + scan |= SCAN_INQUIRY; + + if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE) && + test_bit(HCI_ISCAN, &hdev->flags) == !!(scan & SCAN_INQUIRY)) + return 0; + + return hci_write_scan_enable_sync(hdev, scan); +} + +int hci_update_name_sync(struct hci_dev *hdev) +{ + struct hci_cp_write_local_name cp; + + memset(&cp, 0, sizeof(cp)); + + memcpy(cp.name, hdev->dev_name, sizeof(cp.name)); + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LOCAL_NAME, + sizeof(cp), &cp, + HCI_CMD_TIMEOUT); +} + +/* This function perform powered update HCI command sequence after the HCI init + * sequence which end up resetting all states, the sequence is as follows: + * + * HCI_SSP_ENABLED(Enable SSP) + * HCI_LE_ENABLED(Enable LE) + * HCI_LE_ENABLED(use_ll_privacy(Add local IRK to Resolving List) -> + * Update adv data) + * Enable Authentication + * lmp_bredr_capable(Set Fast Connectable -> Set Scan Type -> Set Class -> + * Set Name -> Set EIR) + */ +int hci_powered_update_sync(struct hci_dev *hdev) +{ + int err; + + /* Register the available SMP channels (BR/EDR and LE) only when + * successfully powering on the controller. This late + * registration is required so that LE SMP can clearly decide if + * the public address or static address is used. + */ + smp_register(hdev); + + err = hci_write_ssp_mode_sync(hdev, 0x01); + if (err) + return err; + + err = hci_write_le_host_supported_sync(hdev, 0x01, 0x00); + if (err) + return err; + + err = hci_powered_update_adv_sync(hdev); + if (err) + return err; + + err = hci_write_auth_enable_sync(hdev); + if (err) + return err; + + if (lmp_bredr_capable(hdev)) { + if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE)) + hci_write_fast_connectable_sync(hdev, true); + else + hci_write_fast_connectable_sync(hdev, false); + hci_update_scan_sync(hdev); + hci_update_class_sync(hdev); + hci_update_name_sync(hdev); + hci_update_eir_sync(hdev); + } + + return 0; +} + +/** + * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address + * (BD_ADDR) for a HCI device from + * a firmware node property. + * @hdev: The HCI device + * + * Search the firmware node for 'local-bd-address'. + * + * All-zero BD addresses are rejected, because those could be properties + * that exist in the firmware tables, but were not updated by the firmware. For + * example, the DTS could define 'local-bd-address', with zero BD addresses. + */ +static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev) +{ + struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent); + bdaddr_t ba; + int ret; + + ret = fwnode_property_read_u8_array(fwnode, "local-bd-address", + (u8 *)&ba, sizeof(ba)); + if (ret < 0 || !bacmp(&ba, BDADDR_ANY)) + return; + + bacpy(&hdev->public_addr, &ba); +} + +struct hci_init_stage { + int (*func)(struct hci_dev *hdev); +}; + +/* Run init stage NULL terminated function table */ +static int hci_init_stage_sync(struct hci_dev *hdev, + const struct hci_init_stage *stage) +{ + size_t i; + + for (i = 0; stage[i].func; i++) { + int err; + + err = stage[i].func(hdev); + if (err) + return err; + } + + return 0; +} + +/* Read Local Version */ +static int hci_read_local_version_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_VERSION, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read BD Address */ +static int hci_read_bd_addr_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_BD_ADDR, + 0, NULL, HCI_CMD_TIMEOUT); +} + +#define HCI_INIT(_func) \ +{ \ + .func = _func, \ +} + +static const struct hci_init_stage hci_init0[] = { + /* HCI_OP_READ_LOCAL_VERSION */ + HCI_INIT(hci_read_local_version_sync), + /* HCI_OP_READ_BD_ADDR */ + HCI_INIT(hci_read_bd_addr_sync), + {} +}; + +int hci_reset_sync(struct hci_dev *hdev) +{ + int err; + + set_bit(HCI_RESET, &hdev->flags); + + err = __hci_cmd_sync_status(hdev, HCI_OP_RESET, 0, NULL, + HCI_CMD_TIMEOUT); + if (err) + return err; + + return 0; +} + +static int hci_init0_sync(struct hci_dev *hdev) +{ + int err; + + bt_dev_dbg(hdev, ""); + + /* Reset */ + if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) { + err = hci_reset_sync(hdev); + if (err) + return err; + } + + return hci_init_stage_sync(hdev, hci_init0); +} + +static int hci_unconf_init_sync(struct hci_dev *hdev) +{ + int err; + + if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) + return 0; + + err = hci_init0_sync(hdev); + if (err < 0) + return err; + + if (hci_dev_test_flag(hdev, HCI_SETUP)) + hci_debugfs_create_basic(hdev); + + return 0; +} + +/* Read Local Supported Features. */ +static int hci_read_local_features_sync(struct hci_dev *hdev) +{ + /* Not all AMP controllers support this command */ + if (hdev->dev_type == HCI_AMP && !(hdev->commands[14] & 0x20)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_FEATURES, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* BR Controller init stage 1 command sequence */ +static const struct hci_init_stage br_init1[] = { + /* HCI_OP_READ_LOCAL_FEATURES */ + HCI_INIT(hci_read_local_features_sync), + /* HCI_OP_READ_LOCAL_VERSION */ + HCI_INIT(hci_read_local_version_sync), + /* HCI_OP_READ_BD_ADDR */ + HCI_INIT(hci_read_bd_addr_sync), + {} +}; + +/* Read Local Commands */ +static int hci_read_local_cmds_sync(struct hci_dev *hdev) +{ + /* All Bluetooth 1.2 and later controllers should support the + * HCI command for reading the local supported commands. + * + * Unfortunately some controllers indicate Bluetooth 1.2 support, + * but do not have support for this command. If that is the case, + * the driver can quirk the behavior and skip reading the local + * supported commands. + */ + if (hdev->hci_ver > BLUETOOTH_VER_1_1 && + !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks)) + return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_COMMANDS, + 0, NULL, HCI_CMD_TIMEOUT); + + return 0; +} + +/* Read Local AMP Info */ +static int hci_read_local_amp_info_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_AMP_INFO, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read Data Blk size */ +static int hci_read_data_block_size_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_DATA_BLOCK_SIZE, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read Flow Control Mode */ +static int hci_read_flow_control_mode_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_FLOW_CONTROL_MODE, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read Location Data */ +static int hci_read_location_data_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCATION_DATA, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* AMP Controller init stage 1 command sequence */ +static const struct hci_init_stage amp_init1[] = { + /* HCI_OP_READ_LOCAL_VERSION */ + HCI_INIT(hci_read_local_version_sync), + /* HCI_OP_READ_LOCAL_COMMANDS */ + HCI_INIT(hci_read_local_cmds_sync), + /* HCI_OP_READ_LOCAL_AMP_INFO */ + HCI_INIT(hci_read_local_amp_info_sync), + /* HCI_OP_READ_DATA_BLOCK_SIZE */ + HCI_INIT(hci_read_data_block_size_sync), + /* HCI_OP_READ_FLOW_CONTROL_MODE */ + HCI_INIT(hci_read_flow_control_mode_sync), + /* HCI_OP_READ_LOCATION_DATA */ + HCI_INIT(hci_read_location_data_sync), + {} +}; + +static int hci_init1_sync(struct hci_dev *hdev) +{ + int err; + + bt_dev_dbg(hdev, ""); + + /* Reset */ + if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) { + err = hci_reset_sync(hdev); + if (err) + return err; + } + + switch (hdev->dev_type) { + case HCI_PRIMARY: + hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED; + return hci_init_stage_sync(hdev, br_init1); + case HCI_AMP: + hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED; + return hci_init_stage_sync(hdev, amp_init1); + default: + bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type); + break; + } + + return 0; +} + +/* AMP Controller init stage 2 command sequence */ +static const struct hci_init_stage amp_init2[] = { + /* HCI_OP_READ_LOCAL_FEATURES */ + HCI_INIT(hci_read_local_features_sync), + {} +}; + +/* Read Buffer Size (ACL mtu, max pkt, etc.) */ +static int hci_read_buffer_size_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_BUFFER_SIZE, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read Class of Device */ +static int hci_read_dev_class_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLASS_OF_DEV, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read Local Name */ +static int hci_read_local_name_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_NAME, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read Voice Setting */ +static int hci_read_voice_setting_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_VOICE_SETTING, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read Number of Supported IAC */ +static int hci_read_num_supported_iac_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_NUM_SUPPORTED_IAC, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read Current IAC LAP */ +static int hci_read_current_iac_lap_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_READ_CURRENT_IAC_LAP, + 0, NULL, HCI_CMD_TIMEOUT); +} + +static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type, + u8 cond_type, bdaddr_t *bdaddr, + u8 auto_accept) +{ + struct hci_cp_set_event_filter cp; + + if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) + return 0; + + if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks)) + return 0; + + memset(&cp, 0, sizeof(cp)); + cp.flt_type = flt_type; + + if (flt_type != HCI_FLT_CLEAR_ALL) { + cp.cond_type = cond_type; + bacpy(&cp.addr_conn_flt.bdaddr, bdaddr); + cp.addr_conn_flt.auto_accept = auto_accept; + } + + return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_FLT, + flt_type == HCI_FLT_CLEAR_ALL ? + sizeof(cp.flt_type) : sizeof(cp), &cp, + HCI_CMD_TIMEOUT); +} + +static int hci_clear_event_filter_sync(struct hci_dev *hdev) +{ + if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED)) + return 0; + + /* In theory the state machine should not reach here unless + * a hci_set_event_filter_sync() call succeeds, but we do + * the check both for parity and as a future reminder. + */ + if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks)) + return 0; + + return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00, + BDADDR_ANY, 0x00); +} + +/* Connection accept timeout ~20 secs */ +static int hci_write_ca_timeout_sync(struct hci_dev *hdev) +{ + __le16 param = cpu_to_le16(0x7d00); + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CA_TIMEOUT, + sizeof(param), ¶m, HCI_CMD_TIMEOUT); +} + +/* BR Controller init stage 2 command sequence */ +static const struct hci_init_stage br_init2[] = { + /* HCI_OP_READ_BUFFER_SIZE */ + HCI_INIT(hci_read_buffer_size_sync), + /* HCI_OP_READ_CLASS_OF_DEV */ + HCI_INIT(hci_read_dev_class_sync), + /* HCI_OP_READ_LOCAL_NAME */ + HCI_INIT(hci_read_local_name_sync), + /* HCI_OP_READ_VOICE_SETTING */ + HCI_INIT(hci_read_voice_setting_sync), + /* HCI_OP_READ_NUM_SUPPORTED_IAC */ + HCI_INIT(hci_read_num_supported_iac_sync), + /* HCI_OP_READ_CURRENT_IAC_LAP */ + HCI_INIT(hci_read_current_iac_lap_sync), + /* HCI_OP_SET_EVENT_FLT */ + HCI_INIT(hci_clear_event_filter_sync), + /* HCI_OP_WRITE_CA_TIMEOUT */ + HCI_INIT(hci_write_ca_timeout_sync), + {} +}; + +static int hci_write_ssp_mode_1_sync(struct hci_dev *hdev) +{ + u8 mode = 0x01; + + if (!lmp_ssp_capable(hdev) || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) + return 0; + + /* When SSP is available, then the host features page + * should also be available as well. However some + * controllers list the max_page as 0 as long as SSP + * has not been enabled. To achieve proper debugging + * output, force the minimum max_page to 1 at least. + */ + hdev->max_page = 0x01; + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SSP_MODE, + sizeof(mode), &mode, HCI_CMD_TIMEOUT); +} + +static int hci_write_eir_sync(struct hci_dev *hdev) +{ + struct hci_cp_write_eir cp; + + if (!lmp_ssp_capable(hdev) || hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) + return 0; + + memset(hdev->eir, 0, sizeof(hdev->eir)); + memset(&cp, 0, sizeof(cp)); + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp, + HCI_CMD_TIMEOUT); +} + +static int hci_write_inquiry_mode_sync(struct hci_dev *hdev) +{ + u8 mode; + + if (!lmp_inq_rssi_capable(hdev) && + !test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) + return 0; + + /* If Extended Inquiry Result events are supported, then + * they are clearly preferred over Inquiry Result with RSSI + * events. + */ + mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01; + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_INQUIRY_MODE, + sizeof(mode), &mode, HCI_CMD_TIMEOUT); +} + +static int hci_read_inq_rsp_tx_power_sync(struct hci_dev *hdev) +{ + if (!lmp_inq_tx_pwr_capable(hdev)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_INQ_RSP_TX_POWER, + 0, NULL, HCI_CMD_TIMEOUT); +} + +static int hci_read_local_ext_features_sync(struct hci_dev *hdev, u8 page) +{ + struct hci_cp_read_local_ext_features cp; + + if (!lmp_ext_feat_capable(hdev)) + return 0; + + memset(&cp, 0, sizeof(cp)); + cp.page = page; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_read_local_ext_features_1_sync(struct hci_dev *hdev) +{ + return hci_read_local_ext_features_sync(hdev, 0x01); +} + +/* HCI Controller init stage 2 command sequence */ +static const struct hci_init_stage hci_init2[] = { + /* HCI_OP_READ_LOCAL_COMMANDS */ + HCI_INIT(hci_read_local_cmds_sync), + /* HCI_OP_WRITE_SSP_MODE */ + HCI_INIT(hci_write_ssp_mode_1_sync), + /* HCI_OP_WRITE_EIR */ + HCI_INIT(hci_write_eir_sync), + /* HCI_OP_WRITE_INQUIRY_MODE */ + HCI_INIT(hci_write_inquiry_mode_sync), + /* HCI_OP_READ_INQ_RSP_TX_POWER */ + HCI_INIT(hci_read_inq_rsp_tx_power_sync), + /* HCI_OP_READ_LOCAL_EXT_FEATURES */ + HCI_INIT(hci_read_local_ext_features_1_sync), + /* HCI_OP_WRITE_AUTH_ENABLE */ + HCI_INIT(hci_write_auth_enable_sync), + {} +}; + +/* Read LE Buffer Size */ +static int hci_le_read_buffer_size_sync(struct hci_dev *hdev) +{ + /* Use Read LE Buffer Size V2 if supported */ + if (iso_capable(hdev) && hdev->commands[41] & 0x20) + return __hci_cmd_sync_status(hdev, + HCI_OP_LE_READ_BUFFER_SIZE_V2, + 0, NULL, HCI_CMD_TIMEOUT); + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_BUFFER_SIZE, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read LE Local Supported Features */ +static int hci_le_read_local_features_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_LOCAL_FEATURES, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read LE Supported States */ +static int hci_le_read_supported_states_sync(struct hci_dev *hdev) +{ + return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_SUPPORTED_STATES, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* LE Controller init stage 2 command sequence */ +static const struct hci_init_stage le_init2[] = { + /* HCI_OP_LE_READ_LOCAL_FEATURES */ + HCI_INIT(hci_le_read_local_features_sync), + /* HCI_OP_LE_READ_BUFFER_SIZE */ + HCI_INIT(hci_le_read_buffer_size_sync), + /* HCI_OP_LE_READ_SUPPORTED_STATES */ + HCI_INIT(hci_le_read_supported_states_sync), + {} +}; + +static int hci_init2_sync(struct hci_dev *hdev) +{ + int err; + + bt_dev_dbg(hdev, ""); + + if (hdev->dev_type == HCI_AMP) + return hci_init_stage_sync(hdev, amp_init2); + + err = hci_init_stage_sync(hdev, hci_init2); + if (err) + return err; + + if (lmp_bredr_capable(hdev)) { + err = hci_init_stage_sync(hdev, br_init2); + if (err) + return err; + } else { + hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED); + } + + if (lmp_le_capable(hdev)) { + err = hci_init_stage_sync(hdev, le_init2); + if (err) + return err; + /* LE-only controllers have LE implicitly enabled */ + if (!lmp_bredr_capable(hdev)) + hci_dev_set_flag(hdev, HCI_LE_ENABLED); + } + + return 0; +} + +static int hci_set_event_mask_sync(struct hci_dev *hdev) +{ + /* The second byte is 0xff instead of 0x9f (two reserved bits + * disabled) since a Broadcom 1.2 dongle doesn't respond to the + * command otherwise. + */ + u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 }; + + /* CSR 1.1 dongles does not accept any bitfield so don't try to set + * any event mask for pre 1.2 devices. + */ + if (hdev->hci_ver < BLUETOOTH_VER_1_2) + return 0; + + if (lmp_bredr_capable(hdev)) { + events[4] |= 0x01; /* Flow Specification Complete */ + + /* Don't set Disconnect Complete when suspended as that + * would wakeup the host when disconnecting due to + * suspend. + */ + if (hdev->suspended) + events[0] &= 0xef; + } else { + /* Use a different default for LE-only devices */ + memset(events, 0, sizeof(events)); + events[1] |= 0x20; /* Command Complete */ + events[1] |= 0x40; /* Command Status */ + events[1] |= 0x80; /* Hardware Error */ + + /* If the controller supports the Disconnect command, enable + * the corresponding event. In addition enable packet flow + * control related events. + */ + if (hdev->commands[0] & 0x20) { + /* Don't set Disconnect Complete when suspended as that + * would wakeup the host when disconnecting due to + * suspend. + */ + if (!hdev->suspended) + events[0] |= 0x10; /* Disconnection Complete */ + events[2] |= 0x04; /* Number of Completed Packets */ + events[3] |= 0x02; /* Data Buffer Overflow */ + } + + /* If the controller supports the Read Remote Version + * Information command, enable the corresponding event. + */ + if (hdev->commands[2] & 0x80) + events[1] |= 0x08; /* Read Remote Version Information + * Complete + */ + + if (hdev->le_features[0] & HCI_LE_ENCRYPTION) { + events[0] |= 0x80; /* Encryption Change */ + events[5] |= 0x80; /* Encryption Key Refresh Complete */ + } + } + + if (lmp_inq_rssi_capable(hdev) || + test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) + events[4] |= 0x02; /* Inquiry Result with RSSI */ + + if (lmp_ext_feat_capable(hdev)) + events[4] |= 0x04; /* Read Remote Extended Features Complete */ + + if (lmp_esco_capable(hdev)) { + events[5] |= 0x08; /* Synchronous Connection Complete */ + events[5] |= 0x10; /* Synchronous Connection Changed */ + } + + if (lmp_sniffsubr_capable(hdev)) + events[5] |= 0x20; /* Sniff Subrating */ + + if (lmp_pause_enc_capable(hdev)) + events[5] |= 0x80; /* Encryption Key Refresh Complete */ + + if (lmp_ext_inq_capable(hdev)) + events[5] |= 0x40; /* Extended Inquiry Result */ + + if (lmp_no_flush_capable(hdev)) + events[7] |= 0x01; /* Enhanced Flush Complete */ + + if (lmp_lsto_capable(hdev)) + events[6] |= 0x80; /* Link Supervision Timeout Changed */ + + if (lmp_ssp_capable(hdev)) { + events[6] |= 0x01; /* IO Capability Request */ + events[6] |= 0x02; /* IO Capability Response */ + events[6] |= 0x04; /* User Confirmation Request */ + events[6] |= 0x08; /* User Passkey Request */ + events[6] |= 0x10; /* Remote OOB Data Request */ + events[6] |= 0x20; /* Simple Pairing Complete */ + events[7] |= 0x04; /* User Passkey Notification */ + events[7] |= 0x08; /* Keypress Notification */ + events[7] |= 0x10; /* Remote Host Supported + * Features Notification + */ + } + + if (lmp_le_capable(hdev)) + events[7] |= 0x20; /* LE Meta-Event */ + + return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK, + sizeof(events), events, HCI_CMD_TIMEOUT); +} + +static int hci_read_stored_link_key_sync(struct hci_dev *hdev) +{ + struct hci_cp_read_stored_link_key cp; + + if (!(hdev->commands[6] & 0x20) || + test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) + return 0; + + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, BDADDR_ANY); + cp.read_all = 0x01; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_STORED_LINK_KEY, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_setup_link_policy_sync(struct hci_dev *hdev) +{ + struct hci_cp_write_def_link_policy cp; + u16 link_policy = 0; + + if (!(hdev->commands[5] & 0x10)) + return 0; + + memset(&cp, 0, sizeof(cp)); + + if (lmp_rswitch_capable(hdev)) + link_policy |= HCI_LP_RSWITCH; + if (lmp_hold_capable(hdev)) + link_policy |= HCI_LP_HOLD; + if (lmp_sniff_capable(hdev)) + link_policy |= HCI_LP_SNIFF; + if (lmp_park_capable(hdev)) + link_policy |= HCI_LP_PARK; + + cp.policy = cpu_to_le16(link_policy); + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_read_page_scan_activity_sync(struct hci_dev *hdev) +{ + if (!(hdev->commands[8] & 0x01)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_ACTIVITY, + 0, NULL, HCI_CMD_TIMEOUT); +} + +static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev) +{ + if (!(hdev->commands[18] & 0x04) || + !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) || + test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING, + 0, NULL, HCI_CMD_TIMEOUT); +} + +static int hci_read_page_scan_type_sync(struct hci_dev *hdev) +{ + /* Some older Broadcom based Bluetooth 1.2 controllers do not + * support the Read Page Scan Type command. Check support for + * this command in the bit mask of supported commands. + */ + if (!(hdev->commands[13] & 0x01)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read features beyond page 1 if available */ +static int hci_read_local_ext_features_all_sync(struct hci_dev *hdev) +{ + u8 page; + int err; + + if (!lmp_ext_feat_capable(hdev)) + return 0; + + for (page = 2; page < HCI_MAX_PAGES && page <= hdev->max_page; + page++) { + err = hci_read_local_ext_features_sync(hdev, page); + if (err) + return err; + } + + return 0; +} + +/* HCI Controller init stage 3 command sequence */ +static const struct hci_init_stage hci_init3[] = { + /* HCI_OP_SET_EVENT_MASK */ + HCI_INIT(hci_set_event_mask_sync), + /* HCI_OP_READ_STORED_LINK_KEY */ + HCI_INIT(hci_read_stored_link_key_sync), + /* HCI_OP_WRITE_DEF_LINK_POLICY */ + HCI_INIT(hci_setup_link_policy_sync), + /* HCI_OP_READ_PAGE_SCAN_ACTIVITY */ + HCI_INIT(hci_read_page_scan_activity_sync), + /* HCI_OP_READ_DEF_ERR_DATA_REPORTING */ + HCI_INIT(hci_read_def_err_data_reporting_sync), + /* HCI_OP_READ_PAGE_SCAN_TYPE */ + HCI_INIT(hci_read_page_scan_type_sync), + /* HCI_OP_READ_LOCAL_EXT_FEATURES */ + HCI_INIT(hci_read_local_ext_features_all_sync), + {} +}; + +static int hci_le_set_event_mask_sync(struct hci_dev *hdev) +{ + u8 events[8]; + + if (!lmp_le_capable(hdev)) + return 0; + + memset(events, 0, sizeof(events)); + + if (hdev->le_features[0] & HCI_LE_ENCRYPTION) + events[0] |= 0x10; /* LE Long Term Key Request */ + + /* If controller supports the Connection Parameters Request + * Link Layer Procedure, enable the corresponding event. + */ + if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC) + /* LE Remote Connection Parameter Request */ + events[0] |= 0x20; + + /* If the controller supports the Data Length Extension + * feature, enable the corresponding event. + */ + if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) + events[0] |= 0x40; /* LE Data Length Change */ + + /* If the controller supports LL Privacy feature or LE Extended Adv, + * enable the corresponding event. + */ + if (use_enhanced_conn_complete(hdev)) + events[1] |= 0x02; /* LE Enhanced Connection Complete */ + + /* If the controller supports Extended Scanner Filter + * Policies, enable the corresponding event. + */ + if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY) + events[1] |= 0x04; /* LE Direct Advertising Report */ + + /* If the controller supports Channel Selection Algorithm #2 + * feature, enable the corresponding event. + */ + if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2) + events[2] |= 0x08; /* LE Channel Selection Algorithm */ + + /* If the controller supports the LE Set Scan Enable command, + * enable the corresponding advertising report event. + */ + if (hdev->commands[26] & 0x08) + events[0] |= 0x02; /* LE Advertising Report */ + + /* If the controller supports the LE Create Connection + * command, enable the corresponding event. + */ + if (hdev->commands[26] & 0x10) + events[0] |= 0x01; /* LE Connection Complete */ + + /* If the controller supports the LE Connection Update + * command, enable the corresponding event. + */ + if (hdev->commands[27] & 0x04) + events[0] |= 0x04; /* LE Connection Update Complete */ + + /* If the controller supports the LE Read Remote Used Features + * command, enable the corresponding event. + */ + if (hdev->commands[27] & 0x20) + /* LE Read Remote Used Features Complete */ + events[0] |= 0x08; + + /* If the controller supports the LE Read Local P-256 + * Public Key command, enable the corresponding event. + */ + if (hdev->commands[34] & 0x02) + /* LE Read Local P-256 Public Key Complete */ + events[0] |= 0x80; + + /* If the controller supports the LE Generate DHKey + * command, enable the corresponding event. + */ + if (hdev->commands[34] & 0x04) + events[1] |= 0x01; /* LE Generate DHKey Complete */ + + /* If the controller supports the LE Set Default PHY or + * LE Set PHY commands, enable the corresponding event. + */ + if (hdev->commands[35] & (0x20 | 0x40)) + events[1] |= 0x08; /* LE PHY Update Complete */ + + /* If the controller supports LE Set Extended Scan Parameters + * and LE Set Extended Scan Enable commands, enable the + * corresponding event. + */ + if (use_ext_scan(hdev)) + events[1] |= 0x10; /* LE Extended Advertising Report */ + + /* If the controller supports the LE Extended Advertising + * command, enable the corresponding event. + */ + if (ext_adv_capable(hdev)) + events[2] |= 0x02; /* LE Advertising Set Terminated */ + + if (cis_capable(hdev)) { + events[3] |= 0x01; /* LE CIS Established */ + if (cis_peripheral_capable(hdev)) + events[3] |= 0x02; /* LE CIS Request */ + } + + if (bis_capable(hdev)) { + events[3] |= 0x04; /* LE Create BIG Complete */ + events[3] |= 0x08; /* LE Terminate BIG Complete */ + events[3] |= 0x10; /* LE BIG Sync Established */ + events[3] |= 0x20; /* LE BIG Sync Loss */ + } + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EVENT_MASK, + sizeof(events), events, HCI_CMD_TIMEOUT); +} + +/* Read LE Advertising Channel TX Power */ +static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev) +{ + if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) { + /* HCI TS spec forbids mixing of legacy and extended + * advertising commands wherein READ_ADV_TX_POWER is + * also included. So do not call it if extended adv + * is supported otherwise controller will return + * COMMAND_DISALLOWED for extended commands. + */ + return __hci_cmd_sync_status(hdev, + HCI_OP_LE_READ_ADV_TX_POWER, + 0, NULL, HCI_CMD_TIMEOUT); + } + + return 0; +} + +/* Read LE Min/Max Tx Power*/ +static int hci_le_read_tx_power_sync(struct hci_dev *hdev) +{ + if (!(hdev->commands[38] & 0x80) || + test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Read LE Accept List Size */ +static int hci_le_read_accept_list_size_sync(struct hci_dev *hdev) +{ + if (!(hdev->commands[26] & 0x40)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_ACCEPT_LIST_SIZE, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Clear LE Accept List */ +static int hci_le_clear_accept_list_sync(struct hci_dev *hdev) +{ + if (!(hdev->commands[26] & 0x80)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL, + HCI_CMD_TIMEOUT); +} + +/* Read LE Resolving List Size */ +static int hci_le_read_resolv_list_size_sync(struct hci_dev *hdev) +{ + if (!(hdev->commands[34] & 0x40)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_RESOLV_LIST_SIZE, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Clear LE Resolving List */ +static int hci_le_clear_resolv_list_sync(struct hci_dev *hdev) +{ + if (!(hdev->commands[34] & 0x20)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL, + HCI_CMD_TIMEOUT); +} + +/* Set RPA timeout */ +static int hci_le_set_rpa_timeout_sync(struct hci_dev *hdev) +{ + __le16 timeout = cpu_to_le16(hdev->rpa_timeout); + + if (!(hdev->commands[35] & 0x04) || + test_bit(HCI_QUIRK_BROKEN_SET_RPA_TIMEOUT, &hdev->quirks)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_RPA_TIMEOUT, + sizeof(timeout), &timeout, + HCI_CMD_TIMEOUT); +} + +/* Read LE Maximum Data Length */ +static int hci_le_read_max_data_len_sync(struct hci_dev *hdev) +{ + if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL, + HCI_CMD_TIMEOUT); +} + +/* Read LE Suggested Default Data Length */ +static int hci_le_read_def_data_len_sync(struct hci_dev *hdev) +{ + if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL, + HCI_CMD_TIMEOUT); +} + +/* Read LE Number of Supported Advertising Sets */ +static int hci_le_read_num_support_adv_sets_sync(struct hci_dev *hdev) +{ + if (!ext_adv_capable(hdev)) + return 0; + + return __hci_cmd_sync_status(hdev, + HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Write LE Host Supported */ +static int hci_set_le_support_sync(struct hci_dev *hdev) +{ + struct hci_cp_write_le_host_supported cp; + + /* LE-only devices do not support explicit enablement */ + if (!lmp_bredr_capable(hdev)) + return 0; + + memset(&cp, 0, sizeof(cp)); + + if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) { + cp.le = 0x01; + cp.simul = 0x00; + } + + if (cp.le == lmp_host_le_capable(hdev)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +/* LE Set Host Feature */ +static int hci_le_set_host_feature_sync(struct hci_dev *hdev) +{ + struct hci_cp_le_set_host_feature cp; + + if (!iso_capable(hdev)) + return 0; + + memset(&cp, 0, sizeof(cp)); + + /* Isochronous Channels (Host Support) */ + cp.bit_number = 32; + cp.bit_value = 1; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_HOST_FEATURE, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +/* LE Controller init stage 3 command sequence */ +static const struct hci_init_stage le_init3[] = { + /* HCI_OP_LE_SET_EVENT_MASK */ + HCI_INIT(hci_le_set_event_mask_sync), + /* HCI_OP_LE_READ_ADV_TX_POWER */ + HCI_INIT(hci_le_read_adv_tx_power_sync), + /* HCI_OP_LE_READ_TRANSMIT_POWER */ + HCI_INIT(hci_le_read_tx_power_sync), + /* HCI_OP_LE_READ_ACCEPT_LIST_SIZE */ + HCI_INIT(hci_le_read_accept_list_size_sync), + /* HCI_OP_LE_CLEAR_ACCEPT_LIST */ + HCI_INIT(hci_le_clear_accept_list_sync), + /* HCI_OP_LE_READ_RESOLV_LIST_SIZE */ + HCI_INIT(hci_le_read_resolv_list_size_sync), + /* HCI_OP_LE_CLEAR_RESOLV_LIST */ + HCI_INIT(hci_le_clear_resolv_list_sync), + /* HCI_OP_LE_SET_RPA_TIMEOUT */ + HCI_INIT(hci_le_set_rpa_timeout_sync), + /* HCI_OP_LE_READ_MAX_DATA_LEN */ + HCI_INIT(hci_le_read_max_data_len_sync), + /* HCI_OP_LE_READ_DEF_DATA_LEN */ + HCI_INIT(hci_le_read_def_data_len_sync), + /* HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS */ + HCI_INIT(hci_le_read_num_support_adv_sets_sync), + /* HCI_OP_WRITE_LE_HOST_SUPPORTED */ + HCI_INIT(hci_set_le_support_sync), + /* HCI_OP_LE_SET_HOST_FEATURE */ + HCI_INIT(hci_le_set_host_feature_sync), + {} +}; + +static int hci_init3_sync(struct hci_dev *hdev) +{ + int err; + + bt_dev_dbg(hdev, ""); + + err = hci_init_stage_sync(hdev, hci_init3); + if (err) + return err; + + if (lmp_le_capable(hdev)) + return hci_init_stage_sync(hdev, le_init3); + + return 0; +} + +static int hci_delete_stored_link_key_sync(struct hci_dev *hdev) +{ + struct hci_cp_delete_stored_link_key cp; + + /* Some Broadcom based Bluetooth controllers do not support the + * Delete Stored Link Key command. They are clearly indicating its + * absence in the bit mask of supported commands. + * + * Check the supported commands and only if the command is marked + * as supported send it. If not supported assume that the controller + * does not have actual support for stored link keys which makes this + * command redundant anyway. + * + * Some controllers indicate that they support handling deleting + * stored link keys, but they don't. The quirk lets a driver + * just disable this command. + */ + if (!(hdev->commands[6] & 0x80) || + test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) + return 0; + + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, BDADDR_ANY); + cp.delete_all = 0x01; + + return __hci_cmd_sync_status(hdev, HCI_OP_DELETE_STORED_LINK_KEY, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_set_event_mask_page_2_sync(struct hci_dev *hdev) +{ + u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + bool changed = false; + + /* Set event mask page 2 if the HCI command for it is supported */ + if (!(hdev->commands[22] & 0x04)) + return 0; + + /* If Connectionless Peripheral Broadcast central role is supported + * enable all necessary events for it. + */ + if (lmp_cpb_central_capable(hdev)) { + events[1] |= 0x40; /* Triggered Clock Capture */ + events[1] |= 0x80; /* Synchronization Train Complete */ + events[2] |= 0x08; /* Truncated Page Complete */ + events[2] |= 0x20; /* CPB Channel Map Change */ + changed = true; + } + + /* If Connectionless Peripheral Broadcast peripheral role is supported + * enable all necessary events for it. + */ + if (lmp_cpb_peripheral_capable(hdev)) { + events[2] |= 0x01; /* Synchronization Train Received */ + events[2] |= 0x02; /* CPB Receive */ + events[2] |= 0x04; /* CPB Timeout */ + events[2] |= 0x10; /* Peripheral Page Response Timeout */ + changed = true; + } + + /* Enable Authenticated Payload Timeout Expired event if supported */ + if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) { + events[2] |= 0x80; + changed = true; + } + + /* Some Broadcom based controllers indicate support for Set Event + * Mask Page 2 command, but then actually do not support it. Since + * the default value is all bits set to zero, the command is only + * required if the event mask has to be changed. In case no change + * to the event mask is needed, skip this command. + */ + if (!changed) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_SET_EVENT_MASK_PAGE_2, + sizeof(events), events, HCI_CMD_TIMEOUT); +} + +/* Read local codec list if the HCI command is supported */ +static int hci_read_local_codecs_sync(struct hci_dev *hdev) +{ + if (hdev->commands[45] & 0x04) + hci_read_supported_codecs_v2(hdev); + else if (hdev->commands[29] & 0x20) + hci_read_supported_codecs(hdev); + + return 0; +} + +/* Read local pairing options if the HCI command is supported */ +static int hci_read_local_pairing_opts_sync(struct hci_dev *hdev) +{ + if (!(hdev->commands[41] & 0x08)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_LOCAL_PAIRING_OPTS, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Get MWS transport configuration if the HCI command is supported */ +static int hci_get_mws_transport_config_sync(struct hci_dev *hdev) +{ + if (!mws_transport_config_capable(hdev)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_GET_MWS_TRANSPORT_CONFIG, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Check for Synchronization Train support */ +static int hci_read_sync_train_params_sync(struct hci_dev *hdev) +{ + if (!lmp_sync_train_capable(hdev)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_READ_SYNC_TRAIN_PARAMS, + 0, NULL, HCI_CMD_TIMEOUT); +} + +/* Enable Secure Connections if supported and configured */ +static int hci_write_sc_support_1_sync(struct hci_dev *hdev) +{ + u8 support = 0x01; + + if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED) || + !bredr_sc_enabled(hdev)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SC_SUPPORT, + sizeof(support), &support, + HCI_CMD_TIMEOUT); +} + +/* Set erroneous data reporting if supported to the wideband speech + * setting value + */ +static int hci_set_err_data_report_sync(struct hci_dev *hdev) +{ + struct hci_cp_write_def_err_data_reporting cp; + bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED); + + if (!(hdev->commands[18] & 0x08) || + !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) || + test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks)) + return 0; + + if (enabled == hdev->err_data_reporting) + return 0; + + memset(&cp, 0, sizeof(cp)); + cp.err_data_reporting = enabled ? ERR_DATA_REPORTING_ENABLED : + ERR_DATA_REPORTING_DISABLED; + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static const struct hci_init_stage hci_init4[] = { + /* HCI_OP_DELETE_STORED_LINK_KEY */ + HCI_INIT(hci_delete_stored_link_key_sync), + /* HCI_OP_SET_EVENT_MASK_PAGE_2 */ + HCI_INIT(hci_set_event_mask_page_2_sync), + /* HCI_OP_READ_LOCAL_CODECS */ + HCI_INIT(hci_read_local_codecs_sync), + /* HCI_OP_READ_LOCAL_PAIRING_OPTS */ + HCI_INIT(hci_read_local_pairing_opts_sync), + /* HCI_OP_GET_MWS_TRANSPORT_CONFIG */ + HCI_INIT(hci_get_mws_transport_config_sync), + /* HCI_OP_READ_SYNC_TRAIN_PARAMS */ + HCI_INIT(hci_read_sync_train_params_sync), + /* HCI_OP_WRITE_SC_SUPPORT */ + HCI_INIT(hci_write_sc_support_1_sync), + /* HCI_OP_WRITE_DEF_ERR_DATA_REPORTING */ + HCI_INIT(hci_set_err_data_report_sync), + {} +}; + +/* Set Suggested Default Data Length to maximum if supported */ +static int hci_le_set_write_def_data_len_sync(struct hci_dev *hdev) +{ + struct hci_cp_le_write_def_data_len cp; + + if (!(hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)) + return 0; + + memset(&cp, 0, sizeof(cp)); + cp.tx_len = cpu_to_le16(hdev->le_max_tx_len); + cp.tx_time = cpu_to_le16(hdev->le_max_tx_time); + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +/* Set Default PHY parameters if command is supported */ +static int hci_le_set_default_phy_sync(struct hci_dev *hdev) +{ + struct hci_cp_le_set_default_phy cp; + + if (!(hdev->commands[35] & 0x20)) + return 0; + + memset(&cp, 0, sizeof(cp)); + cp.all_phys = 0x00; + cp.tx_phys = hdev->le_tx_def_phys; + cp.rx_phys = hdev->le_rx_def_phys; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_DEFAULT_PHY, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static const struct hci_init_stage le_init4[] = { + /* HCI_OP_LE_WRITE_DEF_DATA_LEN */ + HCI_INIT(hci_le_set_write_def_data_len_sync), + /* HCI_OP_LE_SET_DEFAULT_PHY */ + HCI_INIT(hci_le_set_default_phy_sync), + {} +}; + +static int hci_init4_sync(struct hci_dev *hdev) +{ + int err; + + bt_dev_dbg(hdev, ""); + + err = hci_init_stage_sync(hdev, hci_init4); + if (err) + return err; + + if (lmp_le_capable(hdev)) + return hci_init_stage_sync(hdev, le_init4); + + return 0; +} + +static int hci_init_sync(struct hci_dev *hdev) +{ + int err; + + err = hci_init1_sync(hdev); + if (err < 0) + return err; + + if (hci_dev_test_flag(hdev, HCI_SETUP)) + hci_debugfs_create_basic(hdev); + + err = hci_init2_sync(hdev); + if (err < 0) + return err; + + /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode + * BR/EDR/LE type controllers. AMP controllers only need the + * first two stages of init. + */ + if (hdev->dev_type != HCI_PRIMARY) + return 0; + + err = hci_init3_sync(hdev); + if (err < 0) + return err; + + err = hci_init4_sync(hdev); + if (err < 0) + return err; + + /* This function is only called when the controller is actually in + * configured state. When the controller is marked as unconfigured, + * this initialization procedure is not run. + * + * It means that it is possible that a controller runs through its + * setup phase and then discovers missing settings. If that is the + * case, then this function will not be called. It then will only + * be called during the config phase. + * + * So only when in setup phase or config phase, create the debugfs + * entries and register the SMP channels. + */ + if (!hci_dev_test_flag(hdev, HCI_SETUP) && + !hci_dev_test_flag(hdev, HCI_CONFIG)) + return 0; + + if (hci_dev_test_and_set_flag(hdev, HCI_DEBUGFS_CREATED)) + return 0; + + hci_debugfs_create_common(hdev); + + if (lmp_bredr_capable(hdev)) + hci_debugfs_create_bredr(hdev); + + if (lmp_le_capable(hdev)) + hci_debugfs_create_le(hdev); + + return 0; +} + +#define HCI_QUIRK_BROKEN(_quirk, _desc) { HCI_QUIRK_BROKEN_##_quirk, _desc } + +static const struct { + unsigned long quirk; + const char *desc; +} hci_broken_table[] = { + HCI_QUIRK_BROKEN(LOCAL_COMMANDS, + "HCI Read Local Supported Commands not supported"), + HCI_QUIRK_BROKEN(STORED_LINK_KEY, + "HCI Delete Stored Link Key command is advertised, " + "but not supported."), + HCI_QUIRK_BROKEN(ERR_DATA_REPORTING, + "HCI Read Default Erroneous Data Reporting command is " + "advertised, but not supported."), + HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER, + "HCI Read Transmit Power Level command is advertised, " + "but not supported."), + HCI_QUIRK_BROKEN(FILTER_CLEAR_ALL, + "HCI Set Event Filter command not supported."), + HCI_QUIRK_BROKEN(ENHANCED_SETUP_SYNC_CONN, + "HCI Enhanced Setup Synchronous Connection command is " + "advertised, but not supported."), + HCI_QUIRK_BROKEN(SET_RPA_TIMEOUT, + "HCI LE Set Random Private Address Timeout command is " + "advertised, but not supported.") +}; + +/* This function handles hdev setup stage: + * + * Calls hdev->setup + * Setup address if HCI_QUIRK_USE_BDADDR_PROPERTY is set. + */ +static int hci_dev_setup_sync(struct hci_dev *hdev) +{ + int ret = 0; + bool invalid_bdaddr; + size_t i; + + if (!hci_dev_test_flag(hdev, HCI_SETUP) && + !test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) + return 0; + + bt_dev_dbg(hdev, ""); + + hci_sock_dev_event(hdev, HCI_DEV_SETUP); + + if (hdev->setup) + ret = hdev->setup(hdev); + + for (i = 0; i < ARRAY_SIZE(hci_broken_table); i++) { + if (test_bit(hci_broken_table[i].quirk, &hdev->quirks)) + bt_dev_warn(hdev, "%s", hci_broken_table[i].desc); + } + + /* The transport driver can set the quirk to mark the + * BD_ADDR invalid before creating the HCI device or in + * its setup callback. + */ + invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); + + if (!ret) { + if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks) && + !bacmp(&hdev->public_addr, BDADDR_ANY)) + hci_dev_get_bd_addr_from_property(hdev); + + if ((invalid_bdaddr || + test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) && + bacmp(&hdev->public_addr, BDADDR_ANY) && + hdev->set_bdaddr) { + ret = hdev->set_bdaddr(hdev, &hdev->public_addr); + if (!ret) + invalid_bdaddr = false; + } + } + + /* The transport driver can set these quirks before + * creating the HCI device or in its setup callback. + * + * For the invalid BD_ADDR quirk it is possible that + * it becomes a valid address if the bootloader does + * provide it (see above). + * + * In case any of them is set, the controller has to + * start up as unconfigured. + */ + if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) || + invalid_bdaddr) + hci_dev_set_flag(hdev, HCI_UNCONFIGURED); + + /* For an unconfigured controller it is required to + * read at least the version information provided by + * the Read Local Version Information command. + * + * If the set_bdaddr driver callback is provided, then + * also the original Bluetooth public device address + * will be read using the Read BD Address command. + */ + if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) + return hci_unconf_init_sync(hdev); + + return ret; +} + +/* This function handles hdev init stage: + * + * Calls hci_dev_setup_sync to perform setup stage + * Calls hci_init_sync to perform HCI command init sequence + */ +static int hci_dev_init_sync(struct hci_dev *hdev) +{ + int ret; + + bt_dev_dbg(hdev, ""); + + atomic_set(&hdev->cmd_cnt, 1); + set_bit(HCI_INIT, &hdev->flags); + + ret = hci_dev_setup_sync(hdev); + + if (hci_dev_test_flag(hdev, HCI_CONFIG)) { + /* If public address change is configured, ensure that + * the address gets programmed. If the driver does not + * support changing the public address, fail the power + * on procedure. + */ + if (bacmp(&hdev->public_addr, BDADDR_ANY) && + hdev->set_bdaddr) + ret = hdev->set_bdaddr(hdev, &hdev->public_addr); + else + ret = -EADDRNOTAVAIL; + } + + if (!ret) { + if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && + !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { + ret = hci_init_sync(hdev); + if (!ret && hdev->post_init) + ret = hdev->post_init(hdev); + } + } + + /* If the HCI Reset command is clearing all diagnostic settings, + * then they need to be reprogrammed after the init procedure + * completed. + */ + if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) && + !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && + hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag) + ret = hdev->set_diag(hdev, true); + + if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { + msft_do_open(hdev); + aosp_do_open(hdev); + } + + clear_bit(HCI_INIT, &hdev->flags); + + return ret; +} + +int hci_dev_open_sync(struct hci_dev *hdev) +{ + int ret; + + bt_dev_dbg(hdev, ""); + + if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) { + ret = -ENODEV; + goto done; + } + + if (!hci_dev_test_flag(hdev, HCI_SETUP) && + !hci_dev_test_flag(hdev, HCI_CONFIG)) { + /* Check for rfkill but allow the HCI setup stage to + * proceed (which in itself doesn't cause any RF activity). + */ + if (hci_dev_test_flag(hdev, HCI_RFKILLED)) { + ret = -ERFKILL; + goto done; + } + + /* Check for valid public address or a configured static + * random address, but let the HCI setup proceed to + * be able to determine if there is a public address + * or not. + * + * In case of user channel usage, it is not important + * if a public address or static random address is + * available. + * + * This check is only valid for BR/EDR controllers + * since AMP controllers do not have an address. + */ + if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && + hdev->dev_type == HCI_PRIMARY && + !bacmp(&hdev->bdaddr, BDADDR_ANY) && + !bacmp(&hdev->static_addr, BDADDR_ANY)) { + ret = -EADDRNOTAVAIL; + goto done; + } + } + + if (test_bit(HCI_UP, &hdev->flags)) { + ret = -EALREADY; + goto done; + } + + if (hdev->open(hdev)) { + ret = -EIO; + goto done; + } + + set_bit(HCI_RUNNING, &hdev->flags); + hci_sock_dev_event(hdev, HCI_DEV_OPEN); + + ret = hci_dev_init_sync(hdev); + if (!ret) { + hci_dev_hold(hdev); + hci_dev_set_flag(hdev, HCI_RPA_EXPIRED); + hci_adv_instances_set_rpa_expired(hdev, true); + set_bit(HCI_UP, &hdev->flags); + hci_sock_dev_event(hdev, HCI_DEV_UP); + hci_leds_update_powered(hdev, true); + if (!hci_dev_test_flag(hdev, HCI_SETUP) && + !hci_dev_test_flag(hdev, HCI_CONFIG) && + !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && + !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && + hci_dev_test_flag(hdev, HCI_MGMT) && + hdev->dev_type == HCI_PRIMARY) { + ret = hci_powered_update_sync(hdev); + mgmt_power_on(hdev, ret); + } + } else { + /* Init failed, cleanup */ + flush_work(&hdev->tx_work); + + /* Since hci_rx_work() is possible to awake new cmd_work + * it should be flushed first to avoid unexpected call of + * hci_cmd_work() + */ + flush_work(&hdev->rx_work); + flush_work(&hdev->cmd_work); + + skb_queue_purge(&hdev->cmd_q); + skb_queue_purge(&hdev->rx_q); + + if (hdev->flush) + hdev->flush(hdev); + + if (hdev->sent_cmd) { + cancel_delayed_work_sync(&hdev->cmd_timer); + kfree_skb(hdev->sent_cmd); + hdev->sent_cmd = NULL; + } + + clear_bit(HCI_RUNNING, &hdev->flags); + hci_sock_dev_event(hdev, HCI_DEV_CLOSE); + + hdev->close(hdev); + hdev->flags &= BIT(HCI_RAW); + } + +done: + return ret; +} + +/* This function requires the caller holds hdev->lock */ +static void hci_pend_le_actions_clear(struct hci_dev *hdev) +{ + struct hci_conn_params *p; + + list_for_each_entry(p, &hdev->le_conn_params, list) { + hci_pend_le_list_del_init(p); + if (p->conn) { + hci_conn_drop(p->conn); + hci_conn_put(p->conn); + p->conn = NULL; + } + } + + BT_DBG("All LE pending actions cleared"); +} + +static int hci_dev_shutdown(struct hci_dev *hdev) +{ + int err = 0; + /* Similar to how we first do setup and then set the exclusive access + * bit for userspace, we must first unset userchannel and then clean up. + * Otherwise, the kernel can't properly use the hci channel to clean up + * the controller (some shutdown routines require sending additional + * commands to the controller for example). + */ + bool was_userchannel = + hci_dev_test_and_clear_flag(hdev, HCI_USER_CHANNEL); + + if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) && + test_bit(HCI_UP, &hdev->flags)) { + /* Execute vendor specific shutdown routine */ + if (hdev->shutdown) + err = hdev->shutdown(hdev); + } + + if (was_userchannel) + hci_dev_set_flag(hdev, HCI_USER_CHANNEL); + + return err; +} + +int hci_dev_close_sync(struct hci_dev *hdev) +{ + bool auto_off; + int err = 0; + + bt_dev_dbg(hdev, ""); + + cancel_delayed_work(&hdev->power_off); + cancel_delayed_work(&hdev->ncmd_timer); + cancel_delayed_work(&hdev->le_scan_disable); + cancel_delayed_work(&hdev->le_scan_restart); + + hci_request_cancel_all(hdev); + + if (hdev->adv_instance_timeout) { + cancel_delayed_work_sync(&hdev->adv_instance_expire); + hdev->adv_instance_timeout = 0; + } + + err = hci_dev_shutdown(hdev); + + if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { + cancel_delayed_work_sync(&hdev->cmd_timer); + return err; + } + + hci_leds_update_powered(hdev, false); + + /* Flush RX and TX works */ + flush_work(&hdev->tx_work); + flush_work(&hdev->rx_work); + + if (hdev->discov_timeout > 0) { + hdev->discov_timeout = 0; + hci_dev_clear_flag(hdev, HCI_DISCOVERABLE); + hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE); + } + + if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE)) + cancel_delayed_work(&hdev->service_cache); + + if (hci_dev_test_flag(hdev, HCI_MGMT)) { + struct adv_info *adv_instance; + + cancel_delayed_work_sync(&hdev->rpa_expired); + + list_for_each_entry(adv_instance, &hdev->adv_instances, list) + cancel_delayed_work_sync(&adv_instance->rpa_expired_cb); + } + + /* Avoid potential lockdep warnings from the *_flush() calls by + * ensuring the workqueue is empty up front. + */ + drain_workqueue(hdev->workqueue); + + hci_dev_lock(hdev); + + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + + auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF); + + if (!auto_off && hdev->dev_type == HCI_PRIMARY && + !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && + hci_dev_test_flag(hdev, HCI_MGMT)) + __mgmt_power_off(hdev); + + hci_inquiry_cache_flush(hdev); + hci_pend_le_actions_clear(hdev); + hci_conn_hash_flush(hdev); + /* Prevent data races on hdev->smp_data or hdev->smp_bredr_data */ + smp_unregister(hdev); + hci_dev_unlock(hdev); + + hci_sock_dev_event(hdev, HCI_DEV_DOWN); + + if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { + aosp_do_close(hdev); + msft_do_close(hdev); + } + + if (hdev->flush) + hdev->flush(hdev); + + /* Reset device */ + skb_queue_purge(&hdev->cmd_q); + atomic_set(&hdev->cmd_cnt, 1); + if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) && + !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { + set_bit(HCI_INIT, &hdev->flags); + hci_reset_sync(hdev); + clear_bit(HCI_INIT, &hdev->flags); + } + + /* flush cmd work */ + flush_work(&hdev->cmd_work); + + /* Drop queues */ + skb_queue_purge(&hdev->rx_q); + skb_queue_purge(&hdev->cmd_q); + skb_queue_purge(&hdev->raw_q); + + /* Drop last sent command */ + if (hdev->sent_cmd) { + cancel_delayed_work_sync(&hdev->cmd_timer); + kfree_skb(hdev->sent_cmd); + hdev->sent_cmd = NULL; + } + + clear_bit(HCI_RUNNING, &hdev->flags); + hci_sock_dev_event(hdev, HCI_DEV_CLOSE); + + /* After this point our queues are empty and no tasks are scheduled. */ + hdev->close(hdev); + + /* Clear flags */ + hdev->flags &= BIT(HCI_RAW); + hci_dev_clear_volatile_flags(hdev); + + /* Controller radio is available but is currently powered down */ + hdev->amp_status = AMP_STATUS_POWERED_DOWN; + + memset(hdev->eir, 0, sizeof(hdev->eir)); + memset(hdev->dev_class, 0, sizeof(hdev->dev_class)); + bacpy(&hdev->random_addr, BDADDR_ANY); + hci_codec_list_clear(&hdev->local_codecs); + + hci_dev_put(hdev); + return err; +} + +/* This function perform power on HCI command sequence as follows: + * + * If controller is already up (HCI_UP) performs hci_powered_update_sync + * sequence otherwise run hci_dev_open_sync which will follow with + * hci_powered_update_sync after the init sequence is completed. + */ +static int hci_power_on_sync(struct hci_dev *hdev) +{ + int err; + + if (test_bit(HCI_UP, &hdev->flags) && + hci_dev_test_flag(hdev, HCI_MGMT) && + hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) { + cancel_delayed_work(&hdev->power_off); + return hci_powered_update_sync(hdev); + } + + err = hci_dev_open_sync(hdev); + if (err < 0) + return err; + + /* During the HCI setup phase, a few error conditions are + * ignored and they need to be checked now. If they are still + * valid, it is important to return the device back off. + */ + if (hci_dev_test_flag(hdev, HCI_RFKILLED) || + hci_dev_test_flag(hdev, HCI_UNCONFIGURED) || + (hdev->dev_type == HCI_PRIMARY && + !bacmp(&hdev->bdaddr, BDADDR_ANY) && + !bacmp(&hdev->static_addr, BDADDR_ANY))) { + hci_dev_clear_flag(hdev, HCI_AUTO_OFF); + hci_dev_close_sync(hdev); + } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) { + queue_delayed_work(hdev->req_workqueue, &hdev->power_off, + HCI_AUTO_OFF_TIMEOUT); + } + + if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) { + /* For unconfigured devices, set the HCI_RAW flag + * so that userspace can easily identify them. + */ + if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) + set_bit(HCI_RAW, &hdev->flags); + + /* For fully configured devices, this will send + * the Index Added event. For unconfigured devices, + * it will send Unconfigued Index Added event. + * + * Devices with HCI_QUIRK_RAW_DEVICE are ignored + * and no event will be send. + */ + mgmt_index_added(hdev); + } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) { + /* When the controller is now configured, then it + * is important to clear the HCI_RAW flag. + */ + if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) + clear_bit(HCI_RAW, &hdev->flags); + + /* Powering on the controller with HCI_CONFIG set only + * happens with the transition from unconfigured to + * configured. This will send the Index Added event. + */ + mgmt_index_added(hdev); + } + + return 0; +} + +static int hci_remote_name_cancel_sync(struct hci_dev *hdev, bdaddr_t *addr) +{ + struct hci_cp_remote_name_req_cancel cp; + + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, addr); + + return __hci_cmd_sync_status(hdev, HCI_OP_REMOTE_NAME_REQ_CANCEL, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_stop_discovery_sync(struct hci_dev *hdev) +{ + struct discovery_state *d = &hdev->discovery; + struct inquiry_entry *e; + int err; + + bt_dev_dbg(hdev, "state %u", hdev->discovery.state); + + if (d->state == DISCOVERY_FINDING || d->state == DISCOVERY_STOPPING) { + if (test_bit(HCI_INQUIRY, &hdev->flags)) { + err = __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY_CANCEL, + 0, NULL, HCI_CMD_TIMEOUT); + if (err) + return err; + } + + if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) { + cancel_delayed_work(&hdev->le_scan_disable); + cancel_delayed_work(&hdev->le_scan_restart); + + err = hci_scan_disable_sync(hdev); + if (err) + return err; + } + + } else { + err = hci_scan_disable_sync(hdev); + if (err) + return err; + } + + /* Resume advertising if it was paused */ + if (use_ll_privacy(hdev)) + hci_resume_advertising_sync(hdev); + + /* No further actions needed for LE-only discovery */ + if (d->type == DISCOV_TYPE_LE) + return 0; + + if (d->state == DISCOVERY_RESOLVING || d->state == DISCOVERY_STOPPING) { + e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, + NAME_PENDING); + if (!e) + return 0; + + return hci_remote_name_cancel_sync(hdev, &e->data.bdaddr); + } + + return 0; +} + +static int hci_disconnect_phy_link_sync(struct hci_dev *hdev, u16 handle, + u8 reason) +{ + struct hci_cp_disconn_phy_link cp; + + memset(&cp, 0, sizeof(cp)); + cp.phy_handle = HCI_PHY_HANDLE(handle); + cp.reason = reason; + + return __hci_cmd_sync_status(hdev, HCI_OP_DISCONN_PHY_LINK, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_disconnect_sync(struct hci_dev *hdev, struct hci_conn *conn, + u8 reason) +{ + struct hci_cp_disconnect cp; + + if (conn->type == AMP_LINK) + return hci_disconnect_phy_link_sync(hdev, conn->handle, reason); + + memset(&cp, 0, sizeof(cp)); + cp.handle = cpu_to_le16(conn->handle); + cp.reason = reason; + + /* Wait for HCI_EV_DISCONN_COMPLETE not HCI_EV_CMD_STATUS when not + * suspending. + */ + if (!hdev->suspended) + return __hci_cmd_sync_status_sk(hdev, HCI_OP_DISCONNECT, + sizeof(cp), &cp, + HCI_EV_DISCONN_COMPLETE, + HCI_CMD_TIMEOUT, NULL); + + return __hci_cmd_sync_status(hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp, + HCI_CMD_TIMEOUT); +} + +static int hci_le_connect_cancel_sync(struct hci_dev *hdev, + struct hci_conn *conn) +{ + if (test_bit(HCI_CONN_SCANNING, &conn->flags)) + return 0; + + if (test_and_set_bit(HCI_CONN_CANCEL, &conn->flags)) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_CREATE_CONN_CANCEL, + 0, NULL, HCI_CMD_TIMEOUT); +} + +static int hci_connect_cancel_sync(struct hci_dev *hdev, struct hci_conn *conn) +{ + if (conn->type == LE_LINK) + return hci_le_connect_cancel_sync(hdev, conn); + + if (hdev->hci_ver < BLUETOOTH_VER_1_2) + return 0; + + return __hci_cmd_sync_status(hdev, HCI_OP_CREATE_CONN_CANCEL, + 6, &conn->dst, HCI_CMD_TIMEOUT); +} + +static int hci_reject_sco_sync(struct hci_dev *hdev, struct hci_conn *conn, + u8 reason) +{ + struct hci_cp_reject_sync_conn_req cp; + + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, &conn->dst); + cp.reason = reason; + + /* SCO rejection has its own limited set of + * allowed error values (0x0D-0x0F). + */ + if (reason < 0x0d || reason > 0x0f) + cp.reason = HCI_ERROR_REJ_LIMITED_RESOURCES; + + return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_SYNC_CONN_REQ, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_reject_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, + u8 reason) +{ + struct hci_cp_reject_conn_req cp; + + if (conn->type == SCO_LINK || conn->type == ESCO_LINK) + return hci_reject_sco_sync(hdev, conn, reason); + + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, &conn->dst); + cp.reason = reason; + + return __hci_cmd_sync_status(hdev, HCI_OP_REJECT_CONN_REQ, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason) +{ + int err; + + switch (conn->state) { + case BT_CONNECTED: + case BT_CONFIG: + return hci_disconnect_sync(hdev, conn, reason); + case BT_CONNECT: + err = hci_connect_cancel_sync(hdev, conn); + /* Cleanup hci_conn object if it cannot be cancelled as it + * likelly means the controller and host stack are out of sync. + */ + if (err) { + hci_dev_lock(hdev); + hci_conn_failed(conn, err); + hci_dev_unlock(hdev); + } + return err; + case BT_CONNECT2: + return hci_reject_conn_sync(hdev, conn, reason); + default: + conn->state = BT_CLOSED; + break; + } + + return 0; +} + +static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason) +{ + struct hci_conn *conn, *tmp; + int err; + + list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) { + err = hci_abort_conn_sync(hdev, conn, reason); + if (err) + return err; + } + + return 0; +} + +/* This function perform power off HCI command sequence as follows: + * + * Clear Advertising + * Stop Discovery + * Disconnect all connections + * hci_dev_close_sync + */ +static int hci_power_off_sync(struct hci_dev *hdev) +{ + int err; + + /* If controller is already down there is nothing to do */ + if (!test_bit(HCI_UP, &hdev->flags)) + return 0; + + if (test_bit(HCI_ISCAN, &hdev->flags) || + test_bit(HCI_PSCAN, &hdev->flags)) { + err = hci_write_scan_enable_sync(hdev, 0x00); + if (err) + return err; + } + + err = hci_clear_adv_sync(hdev, NULL, false); + if (err) + return err; + + err = hci_stop_discovery_sync(hdev); + if (err) + return err; + + /* Terminated due to Power Off */ + err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF); + if (err) + return err; + + return hci_dev_close_sync(hdev); +} + +int hci_set_powered_sync(struct hci_dev *hdev, u8 val) +{ + if (val) + return hci_power_on_sync(hdev); + + return hci_power_off_sync(hdev); +} + +static int hci_write_iac_sync(struct hci_dev *hdev) +{ + struct hci_cp_write_current_iac_lap cp; + + if (!hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) + return 0; + + memset(&cp, 0, sizeof(cp)); + + if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) { + /* Limited discoverable mode */ + cp.num_iac = min_t(u8, hdev->num_iac, 2); + cp.iac_lap[0] = 0x00; /* LIAC */ + cp.iac_lap[1] = 0x8b; + cp.iac_lap[2] = 0x9e; + cp.iac_lap[3] = 0x33; /* GIAC */ + cp.iac_lap[4] = 0x8b; + cp.iac_lap[5] = 0x9e; + } else { + /* General discoverable mode */ + cp.num_iac = 1; + cp.iac_lap[0] = 0x33; /* GIAC */ + cp.iac_lap[1] = 0x8b; + cp.iac_lap[2] = 0x9e; + } + + return __hci_cmd_sync_status(hdev, HCI_OP_WRITE_CURRENT_IAC_LAP, + (cp.num_iac * 3) + 1, &cp, + HCI_CMD_TIMEOUT); +} + +int hci_update_discoverable_sync(struct hci_dev *hdev) +{ + int err = 0; + + if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { + err = hci_write_iac_sync(hdev); + if (err) + return err; + + err = hci_update_scan_sync(hdev); + if (err) + return err; + + err = hci_update_class_sync(hdev); + if (err) + return err; + } + + /* Advertising instances don't use the global discoverable setting, so + * only update AD if advertising was enabled using Set Advertising. + */ + if (hci_dev_test_flag(hdev, HCI_ADVERTISING)) { + err = hci_update_adv_data_sync(hdev, 0x00); + if (err) + return err; + + /* Discoverable mode affects the local advertising + * address in limited privacy mode. + */ + if (hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) { + if (ext_adv_capable(hdev)) + err = hci_start_ext_adv_sync(hdev, 0x00); + else + err = hci_enable_advertising_sync(hdev); + } + } + + return err; +} + +static int update_discoverable_sync(struct hci_dev *hdev, void *data) +{ + return hci_update_discoverable_sync(hdev); +} + +int hci_update_discoverable(struct hci_dev *hdev) +{ + /* Only queue if it would have any effect */ + if (hdev_is_powered(hdev) && + hci_dev_test_flag(hdev, HCI_ADVERTISING) && + hci_dev_test_flag(hdev, HCI_DISCOVERABLE) && + hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY)) + return hci_cmd_sync_queue(hdev, update_discoverable_sync, NULL, + NULL); + + return 0; +} + +int hci_update_connectable_sync(struct hci_dev *hdev) +{ + int err; + + err = hci_update_scan_sync(hdev); + if (err) + return err; + + /* If BR/EDR is not enabled and we disable advertising as a + * by-product of disabling connectable, we need to update the + * advertising flags. + */ + if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) + err = hci_update_adv_data_sync(hdev, hdev->cur_adv_instance); + + /* Update the advertising parameters if necessary */ + if (hci_dev_test_flag(hdev, HCI_ADVERTISING) || + !list_empty(&hdev->adv_instances)) { + if (ext_adv_capable(hdev)) + err = hci_start_ext_adv_sync(hdev, + hdev->cur_adv_instance); + else + err = hci_enable_advertising_sync(hdev); + + if (err) + return err; + } + + return hci_update_passive_scan_sync(hdev); +} + +static int hci_inquiry_sync(struct hci_dev *hdev, u8 length) +{ + const u8 giac[3] = { 0x33, 0x8b, 0x9e }; + const u8 liac[3] = { 0x00, 0x8b, 0x9e }; + struct hci_cp_inquiry cp; + + bt_dev_dbg(hdev, ""); + + if (hci_dev_test_flag(hdev, HCI_INQUIRY)) + return 0; + + hci_dev_lock(hdev); + hci_inquiry_cache_flush(hdev); + hci_dev_unlock(hdev); + + memset(&cp, 0, sizeof(cp)); + + if (hdev->discovery.limited) + memcpy(&cp.lap, liac, sizeof(cp.lap)); + else + memcpy(&cp.lap, giac, sizeof(cp.lap)); + + cp.length = length; + + return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval) +{ + u8 own_addr_type; + /* Accept list is not used for discovery */ + u8 filter_policy = 0x00; + /* Default is to enable duplicates filter */ + u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE; + int err; + + bt_dev_dbg(hdev, ""); + + /* If controller is scanning, it means the passive scanning is + * running. Thus, we should temporarily stop it in order to set the + * discovery scanning parameters. + */ + err = hci_scan_disable_sync(hdev); + if (err) { + bt_dev_err(hdev, "Unable to disable scanning: %d", err); + return err; + } + + cancel_interleave_scan(hdev); + + /* Pause address resolution for active scan and stop advertising if + * privacy is enabled. + */ + err = hci_pause_addr_resolution(hdev); + if (err) + goto failed; + + /* All active scans will be done with either a resolvable private + * address (when privacy feature has been enabled) or non-resolvable + * private address. + */ + err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev), + &own_addr_type); + if (err < 0) + own_addr_type = ADDR_LE_DEV_PUBLIC; + + if (hci_is_adv_monitoring(hdev)) { + /* Duplicate filter should be disabled when some advertisement + * monitor is activated, otherwise AdvMon can only receive one + * advertisement for one peer(*) during active scanning, and + * might report loss to these peers. + * + * Note that different controllers have different meanings of + * |duplicate|. Some of them consider packets with the same + * address as duplicate, and others consider packets with the + * same address and the same RSSI as duplicate. Although in the + * latter case we don't need to disable duplicate filter, but + * it is common to have active scanning for a short period of + * time, the power impact should be neglectable. + */ + filter_dup = LE_SCAN_FILTER_DUP_DISABLE; + } + + err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval, + hdev->le_scan_window_discovery, + own_addr_type, filter_policy, filter_dup); + if (!err) + return err; + +failed: + /* Resume advertising if it was paused */ + if (use_ll_privacy(hdev)) + hci_resume_advertising_sync(hdev); + + /* Resume passive scanning */ + hci_update_passive_scan_sync(hdev); + return err; +} + +static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev) +{ + int err; + + bt_dev_dbg(hdev, ""); + + err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2); + if (err) + return err; + + return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN); +} + +int hci_start_discovery_sync(struct hci_dev *hdev) +{ + unsigned long timeout; + int err; + + bt_dev_dbg(hdev, "type %u", hdev->discovery.type); + + switch (hdev->discovery.type) { + case DISCOV_TYPE_BREDR: + return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN); + case DISCOV_TYPE_INTERLEAVED: + /* When running simultaneous discovery, the LE scanning time + * should occupy the whole discovery time sine BR/EDR inquiry + * and LE scanning are scheduled by the controller. + * + * For interleaving discovery in comparison, BR/EDR inquiry + * and LE scanning are done sequentially with separate + * timeouts. + */ + if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, + &hdev->quirks)) { + timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT); + /* During simultaneous discovery, we double LE scan + * interval. We must leave some time for the controller + * to do BR/EDR inquiry. + */ + err = hci_start_interleaved_discovery_sync(hdev); + break; + } + + timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout); + err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery); + break; + case DISCOV_TYPE_LE: + timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT); + err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery); + break; + default: + return -EINVAL; + } + + if (err) + return err; + + bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout)); + + /* When service discovery is used and the controller has a + * strict duplicate filter, it is important to remember the + * start and duration of the scan. This is required for + * restarting scanning during the discovery phase. + */ + if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) && + hdev->discovery.result_filtering) { + hdev->discovery.scan_start = jiffies; + hdev->discovery.scan_duration = timeout; + } + + queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable, + timeout); + return 0; +} + +static void hci_suspend_monitor_sync(struct hci_dev *hdev) +{ + switch (hci_get_adv_monitor_offload_ext(hdev)) { + case HCI_ADV_MONITOR_EXT_MSFT: + msft_suspend_sync(hdev); + break; + default: + return; + } +} + +/* This function disables discovery and mark it as paused */ +static int hci_pause_discovery_sync(struct hci_dev *hdev) +{ + int old_state = hdev->discovery.state; + int err; + + /* If discovery already stopped/stopping/paused there nothing to do */ + if (old_state == DISCOVERY_STOPPED || old_state == DISCOVERY_STOPPING || + hdev->discovery_paused) + return 0; + + hci_discovery_set_state(hdev, DISCOVERY_STOPPING); + err = hci_stop_discovery_sync(hdev); + if (err) + return err; + + hdev->discovery_paused = true; + hdev->discovery_old_state = old_state; + hci_discovery_set_state(hdev, DISCOVERY_STOPPED); + + return 0; +} + +static int hci_update_event_filter_sync(struct hci_dev *hdev) +{ + struct bdaddr_list_with_flags *b; + u8 scan = SCAN_DISABLED; + bool scanning = test_bit(HCI_PSCAN, &hdev->flags); + int err; + + if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) + return 0; + + /* Some fake CSR controllers lock up after setting this type of + * filter, so avoid sending the request altogether. + */ + if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks)) + return 0; + + /* Always clear event filter when starting */ + hci_clear_event_filter_sync(hdev); + + list_for_each_entry(b, &hdev->accept_list, list) { + if (!(b->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) + continue; + + bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr); + + err = hci_set_event_filter_sync(hdev, HCI_FLT_CONN_SETUP, + HCI_CONN_SETUP_ALLOW_BDADDR, + &b->bdaddr, + HCI_CONN_SETUP_AUTO_ON); + if (err) + bt_dev_dbg(hdev, "Failed to set event filter for %pMR", + &b->bdaddr); + else + scan = SCAN_PAGE; + } + + if (scan && !scanning) + hci_write_scan_enable_sync(hdev, scan); + else if (!scan && scanning) + hci_write_scan_enable_sync(hdev, scan); + + return 0; +} + +/* This function disables scan (BR and LE) and mark it as paused */ +static int hci_pause_scan_sync(struct hci_dev *hdev) +{ + if (hdev->scanning_paused) + return 0; + + /* Disable page scan if enabled */ + if (test_bit(HCI_PSCAN, &hdev->flags)) + hci_write_scan_enable_sync(hdev, SCAN_DISABLED); + + hci_scan_disable_sync(hdev); + + hdev->scanning_paused = true; + + return 0; +} + +/* This function performs the HCI suspend procedures in the follow order: + * + * Pause discovery (active scanning/inquiry) + * Pause Directed Advertising/Advertising + * Pause Scanning (passive scanning in case discovery was not active) + * Disconnect all connections + * Set suspend_status to BT_SUSPEND_DISCONNECT if hdev cannot wakeup + * otherwise: + * Update event mask (only set events that are allowed to wake up the host) + * Update event filter (with devices marked with HCI_CONN_FLAG_REMOTE_WAKEUP) + * Update passive scanning (lower duty cycle) + * Set suspend_status to BT_SUSPEND_CONFIGURE_WAKE + */ +int hci_suspend_sync(struct hci_dev *hdev) +{ + int err; + + /* If marked as suspended there nothing to do */ + if (hdev->suspended) + return 0; + + /* Mark device as suspended */ + hdev->suspended = true; + + /* Pause discovery if not already stopped */ + hci_pause_discovery_sync(hdev); + + /* Pause other advertisements */ + hci_pause_advertising_sync(hdev); + + /* Suspend monitor filters */ + hci_suspend_monitor_sync(hdev); + + /* Prevent disconnects from causing scanning to be re-enabled */ + hci_pause_scan_sync(hdev); + + if (hci_conn_count(hdev)) { + /* Soft disconnect everything (power off) */ + err = hci_disconnect_all_sync(hdev, HCI_ERROR_REMOTE_POWER_OFF); + if (err) { + /* Set state to BT_RUNNING so resume doesn't notify */ + hdev->suspend_state = BT_RUNNING; + hci_resume_sync(hdev); + return err; + } + + /* Update event mask so only the allowed event can wakeup the + * host. + */ + hci_set_event_mask_sync(hdev); + } + + /* Only configure accept list if disconnect succeeded and wake + * isn't being prevented. + */ + if (!hdev->wakeup || !hdev->wakeup(hdev)) { + hdev->suspend_state = BT_SUSPEND_DISCONNECT; + return 0; + } + + /* Unpause to take care of updating scanning params */ + hdev->scanning_paused = false; + + /* Enable event filter for paired devices */ + hci_update_event_filter_sync(hdev); + + /* Update LE passive scan if enabled */ + hci_update_passive_scan_sync(hdev); + + /* Pause scan changes again. */ + hdev->scanning_paused = true; + + hdev->suspend_state = BT_SUSPEND_CONFIGURE_WAKE; + + return 0; +} + +/* This function resumes discovery */ +static int hci_resume_discovery_sync(struct hci_dev *hdev) +{ + int err; + + /* If discovery not paused there nothing to do */ + if (!hdev->discovery_paused) + return 0; + + hdev->discovery_paused = false; + + hci_discovery_set_state(hdev, DISCOVERY_STARTING); + + err = hci_start_discovery_sync(hdev); + + hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED : + DISCOVERY_FINDING); + + return err; +} + +static void hci_resume_monitor_sync(struct hci_dev *hdev) +{ + switch (hci_get_adv_monitor_offload_ext(hdev)) { + case HCI_ADV_MONITOR_EXT_MSFT: + msft_resume_sync(hdev); + break; + default: + return; + } +} + +/* This function resume scan and reset paused flag */ +static int hci_resume_scan_sync(struct hci_dev *hdev) +{ + if (!hdev->scanning_paused) + return 0; + + hdev->scanning_paused = false; + + hci_update_scan_sync(hdev); + + /* Reset passive scanning to normal */ + hci_update_passive_scan_sync(hdev); + + return 0; +} + +/* This function performs the HCI suspend procedures in the follow order: + * + * Restore event mask + * Clear event filter + * Update passive scanning (normal duty cycle) + * Resume Directed Advertising/Advertising + * Resume discovery (active scanning/inquiry) + */ +int hci_resume_sync(struct hci_dev *hdev) +{ + /* If not marked as suspended there nothing to do */ + if (!hdev->suspended) + return 0; + + hdev->suspended = false; + + /* Restore event mask */ + hci_set_event_mask_sync(hdev); + + /* Clear any event filters and restore scan state */ + hci_clear_event_filter_sync(hdev); + + /* Resume scanning */ + hci_resume_scan_sync(hdev); + + /* Resume monitor filters */ + hci_resume_monitor_sync(hdev); + + /* Resume other advertisements */ + hci_resume_advertising_sync(hdev); + + /* Resume discovery */ + hci_resume_discovery_sync(hdev); + + return 0; +} + +static bool conn_use_rpa(struct hci_conn *conn) +{ + struct hci_dev *hdev = conn->hdev; + + return hci_dev_test_flag(hdev, HCI_PRIVACY); +} + +static int hci_le_ext_directed_advertising_sync(struct hci_dev *hdev, + struct hci_conn *conn) +{ + struct hci_cp_le_set_ext_adv_params cp; + int err; + bdaddr_t random_addr; + u8 own_addr_type; + + err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn), + &own_addr_type); + if (err) + return err; + + /* Set require_privacy to false so that the remote device has a + * chance of identifying us. + */ + err = hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL, + &own_addr_type, &random_addr); + if (err) + return err; + + memset(&cp, 0, sizeof(cp)); + + cp.evt_properties = cpu_to_le16(LE_LEGACY_ADV_DIRECT_IND); + cp.own_addr_type = own_addr_type; + cp.channel_map = hdev->le_adv_channel_map; + cp.tx_power = HCI_TX_POWER_INVALID; + cp.primary_phy = HCI_ADV_PHY_1M; + cp.secondary_phy = HCI_ADV_PHY_1M; + cp.handle = 0x00; /* Use instance 0 for directed adv */ + cp.own_addr_type = own_addr_type; + cp.peer_addr_type = conn->dst_type; + bacpy(&cp.peer_addr, &conn->dst); + + /* As per Core Spec 5.2 Vol 2, PART E, Sec 7.8.53, for + * advertising_event_property LE_LEGACY_ADV_DIRECT_IND + * does not supports advertising data when the advertising set already + * contains some, the controller shall return erroc code 'Invalid + * HCI Command Parameters(0x12). + * So it is required to remove adv set for handle 0x00. since we use + * instance 0 for directed adv. + */ + err = hci_remove_ext_adv_instance_sync(hdev, cp.handle, NULL); + if (err) + return err; + + err = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); + if (err) + return err; + + /* Check if random address need to be updated */ + if (own_addr_type == ADDR_LE_DEV_RANDOM && + bacmp(&random_addr, BDADDR_ANY) && + bacmp(&random_addr, &hdev->random_addr)) { + err = hci_set_adv_set_random_addr_sync(hdev, 0x00, + &random_addr); + if (err) + return err; + } + + return hci_enable_ext_advertising_sync(hdev, 0x00); +} + +static int hci_le_directed_advertising_sync(struct hci_dev *hdev, + struct hci_conn *conn) +{ + struct hci_cp_le_set_adv_param cp; + u8 status; + u8 own_addr_type; + u8 enable; + + if (ext_adv_capable(hdev)) + return hci_le_ext_directed_advertising_sync(hdev, conn); + + /* Clear the HCI_LE_ADV bit temporarily so that the + * hci_update_random_address knows that it's safe to go ahead + * and write a new random address. The flag will be set back on + * as soon as the SET_ADV_ENABLE HCI command completes. + */ + hci_dev_clear_flag(hdev, HCI_LE_ADV); + + /* Set require_privacy to false so that the remote device has a + * chance of identifying us. + */ + status = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn), + &own_addr_type); + if (status) + return status; + + memset(&cp, 0, sizeof(cp)); + + /* Some controllers might reject command if intervals are not + * within range for undirected advertising. + * BCM20702A0 is known to be affected by this. + */ + cp.min_interval = cpu_to_le16(0x0020); + cp.max_interval = cpu_to_le16(0x0020); + + cp.type = LE_ADV_DIRECT_IND; + cp.own_address_type = own_addr_type; + cp.direct_addr_type = conn->dst_type; + bacpy(&cp.direct_addr, &conn->dst); + cp.channel_map = hdev->le_adv_channel_map; + + status = __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_PARAM, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); + if (status) + return status; + + enable = 0x01; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_SET_ADV_ENABLE, + sizeof(enable), &enable, HCI_CMD_TIMEOUT); +} + +static void set_ext_conn_params(struct hci_conn *conn, + struct hci_cp_le_ext_conn_param *p) +{ + struct hci_dev *hdev = conn->hdev; + + memset(p, 0, sizeof(*p)); + + p->scan_interval = cpu_to_le16(hdev->le_scan_int_connect); + p->scan_window = cpu_to_le16(hdev->le_scan_window_connect); + p->conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); + p->conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); + p->conn_latency = cpu_to_le16(conn->le_conn_latency); + p->supervision_timeout = cpu_to_le16(conn->le_supv_timeout); + p->min_ce_len = cpu_to_le16(0x0000); + p->max_ce_len = cpu_to_le16(0x0000); +} + +static int hci_le_ext_create_conn_sync(struct hci_dev *hdev, + struct hci_conn *conn, u8 own_addr_type) +{ + struct hci_cp_le_ext_create_conn *cp; + struct hci_cp_le_ext_conn_param *p; + u8 data[sizeof(*cp) + sizeof(*p) * 3]; + u32 plen; + + cp = (void *)data; + p = (void *)cp->data; + + memset(cp, 0, sizeof(*cp)); + + bacpy(&cp->peer_addr, &conn->dst); + cp->peer_addr_type = conn->dst_type; + cp->own_addr_type = own_addr_type; + + plen = sizeof(*cp); + + if (scan_1m(hdev)) { + cp->phys |= LE_SCAN_PHY_1M; + set_ext_conn_params(conn, p); + + p++; + plen += sizeof(*p); + } + + if (scan_2m(hdev)) { + cp->phys |= LE_SCAN_PHY_2M; + set_ext_conn_params(conn, p); + + p++; + plen += sizeof(*p); + } + + if (scan_coded(hdev)) { + cp->phys |= LE_SCAN_PHY_CODED; + set_ext_conn_params(conn, p); + + plen += sizeof(*p); + } + + return __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_EXT_CREATE_CONN, + plen, data, + HCI_EV_LE_ENHANCED_CONN_COMPLETE, + conn->conn_timeout, NULL); +} + +int hci_le_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn) +{ + struct hci_cp_le_create_conn cp; + struct hci_conn_params *params; + u8 own_addr_type; + int err; + + /* If requested to connect as peripheral use directed advertising */ + if (conn->role == HCI_ROLE_SLAVE) { + /* If we're active scanning and simultaneous roles is not + * enabled simply reject the attempt. + */ + if (hci_dev_test_flag(hdev, HCI_LE_SCAN) && + hdev->le_scan_type == LE_SCAN_ACTIVE && + !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) { + hci_conn_del(conn); + return -EBUSY; + } + + /* Pause advertising while doing directed advertising. */ + hci_pause_advertising_sync(hdev); + + err = hci_le_directed_advertising_sync(hdev, conn); + goto done; + } + + /* Disable advertising if simultaneous roles is not in use. */ + if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) + hci_pause_advertising_sync(hdev); + + params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type); + if (params) { + conn->le_conn_min_interval = params->conn_min_interval; + conn->le_conn_max_interval = params->conn_max_interval; + conn->le_conn_latency = params->conn_latency; + conn->le_supv_timeout = params->supervision_timeout; + } else { + conn->le_conn_min_interval = hdev->le_conn_min_interval; + conn->le_conn_max_interval = hdev->le_conn_max_interval; + conn->le_conn_latency = hdev->le_conn_latency; + conn->le_supv_timeout = hdev->le_supv_timeout; + } + + /* If controller is scanning, we stop it since some controllers are + * not able to scan and connect at the same time. Also set the + * HCI_LE_SCAN_INTERRUPTED flag so that the command complete + * handler for scan disabling knows to set the correct discovery + * state. + */ + if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) { + hci_scan_disable_sync(hdev); + hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED); + } + + /* Update random address, but set require_privacy to false so + * that we never connect with an non-resolvable address. + */ + err = hci_update_random_address_sync(hdev, false, conn_use_rpa(conn), + &own_addr_type); + if (err) + goto done; + + if (use_ext_conn(hdev)) { + err = hci_le_ext_create_conn_sync(hdev, conn, own_addr_type); + goto done; + } + + memset(&cp, 0, sizeof(cp)); + + cp.scan_interval = cpu_to_le16(hdev->le_scan_int_connect); + cp.scan_window = cpu_to_le16(hdev->le_scan_window_connect); + + bacpy(&cp.peer_addr, &conn->dst); + cp.peer_addr_type = conn->dst_type; + cp.own_address_type = own_addr_type; + cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval); + cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval); + cp.conn_latency = cpu_to_le16(conn->le_conn_latency); + cp.supervision_timeout = cpu_to_le16(conn->le_supv_timeout); + cp.min_ce_len = cpu_to_le16(0x0000); + cp.max_ce_len = cpu_to_le16(0x0000); + + /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2261: + * + * If this event is unmasked and the HCI_LE_Connection_Complete event + * is unmasked, only the HCI_LE_Enhanced_Connection_Complete event is + * sent when a new connection has been created. + */ + err = __hci_cmd_sync_status_sk(hdev, HCI_OP_LE_CREATE_CONN, + sizeof(cp), &cp, + use_enhanced_conn_complete(hdev) ? + HCI_EV_LE_ENHANCED_CONN_COMPLETE : + HCI_EV_LE_CONN_COMPLETE, + conn->conn_timeout, NULL); + +done: + if (err == -ETIMEDOUT) + hci_le_connect_cancel_sync(hdev, conn); + + /* Re-enable advertising after the connection attempt is finished. */ + hci_resume_advertising_sync(hdev); + return err; +} + +int hci_le_remove_cig_sync(struct hci_dev *hdev, u8 handle) +{ + struct hci_cp_le_remove_cig cp; + + memset(&cp, 0, sizeof(cp)); + cp.cig_id = handle; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_REMOVE_CIG, sizeof(cp), + &cp, HCI_CMD_TIMEOUT); +} + +int hci_le_big_terminate_sync(struct hci_dev *hdev, u8 handle) +{ + struct hci_cp_le_big_term_sync cp; + + memset(&cp, 0, sizeof(cp)); + cp.handle = handle; + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_BIG_TERM_SYNC, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle) +{ + struct hci_cp_le_pa_term_sync cp; + + memset(&cp, 0, sizeof(cp)); + cp.handle = cpu_to_le16(handle); + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} + +int hci_get_random_address(struct hci_dev *hdev, bool require_privacy, + bool use_rpa, struct adv_info *adv_instance, + u8 *own_addr_type, bdaddr_t *rand_addr) +{ + int err; + + bacpy(rand_addr, BDADDR_ANY); + + /* If privacy is enabled use a resolvable private address. If + * current RPA has expired then generate a new one. + */ + if (use_rpa) { + /* If Controller supports LL Privacy use own address type is + * 0x03 + */ + if (use_ll_privacy(hdev)) + *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED; + else + *own_addr_type = ADDR_LE_DEV_RANDOM; + + if (adv_instance) { + if (adv_rpa_valid(adv_instance)) + return 0; + } else { + if (rpa_valid(hdev)) + return 0; + } + + err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa); + if (err < 0) { + bt_dev_err(hdev, "failed to generate new RPA"); + return err; + } + + bacpy(rand_addr, &hdev->rpa); + + return 0; + } + + /* In case of required privacy without resolvable private address, + * use an non-resolvable private address. This is useful for + * non-connectable advertising. + */ + if (require_privacy) { + bdaddr_t nrpa; + + while (true) { + /* The non-resolvable private address is generated + * from random six bytes with the two most significant + * bits cleared. + */ + get_random_bytes(&nrpa, 6); + nrpa.b[5] &= 0x3f; + + /* The non-resolvable private address shall not be + * equal to the public address. + */ + if (bacmp(&hdev->bdaddr, &nrpa)) + break; + } + + *own_addr_type = ADDR_LE_DEV_RANDOM; + bacpy(rand_addr, &nrpa); + + return 0; + } + + /* No privacy so use a public address. */ + *own_addr_type = ADDR_LE_DEV_PUBLIC; + + return 0; +} + +static int _update_adv_data_sync(struct hci_dev *hdev, void *data) +{ + u8 instance = PTR_ERR(data); + + return hci_update_adv_data_sync(hdev, instance); +} + +int hci_update_adv_data(struct hci_dev *hdev, u8 instance) +{ + return hci_cmd_sync_queue(hdev, _update_adv_data_sync, + ERR_PTR(instance), NULL); +} |