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- // 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);
- }
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