blob: e6d804b82b674a7ae8d6e8dbd67626d14d6b6fef [file] [log] [blame]
// 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_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%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)) {
bt_dev_err(hdev, "Opcode 0x%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);
}
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);
INIT_WORK(&hdev->cmd_sync_cancel_work, hci_cmd_sync_cancel_work);
}
void hci_cmd_sync_clear(struct hci_dev *hdev)
{
struct hci_cmd_sync_work_entry *entry, *tmp;
cancel_work_sync(&hdev->cmd_sync_work);
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);
}
}
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;
if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
return -ENODEV;
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return -ENOMEM;
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);
return 0;
}
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 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);
}
}
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;
if (ext_adv_capable(hdev))
/* Remove all existing sets */
return hci_clear_adv_sets_sync(hdev, sk);
/* 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;
/* If we use extended advertising, instance has to be removed first. */
if (ext_adv_capable(hdev))
return hci_remove_ext_adv_instance_sync(hdev, instance, sk);
/* 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;
/* If controller is not advertising we are done. */
if (!hci_dev_test_flag(hdev, HCI_LE_ADV))
return 0;
if (ext_adv_capable(hdev))
return hci_disable_ext_adv_instance_sync(hdev, 0x00);
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;
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;
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;
}
/* 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 hci_conn_params *params)
{
struct hci_cp_le_add_to_resolv_list cp;
struct smp_irk *irk;
struct bdaddr_list_with_irk *entry;
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, &params->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,
&params->addr,
params->addr_type);
if (entry)
return 0;
cp.bdaddr_type = params->addr_type;
bacpy(&cp.bdaddr, &params->addr);
memcpy(cp.peer_irk, irk->val, 16);
/* Default privacy mode is always Network */
params->privacy_mode = HCI_NETWORK_PRIVACY;
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 hci_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, &params->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;
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 hci_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, &params->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, &params->addr,
params->addr_type))
return 0;
*num_entries += 1;
cp.bdaddr_type = params->addr_type;
bacpy(&cp.bdaddr, &params->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;
}
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);
}
/* 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 hci_conn_params *params;
struct bdaddr_list *b, *t;
u8 num_entries = 0;
bool pend_conn, pend_report;
u8 filter_policy;
int err;
/* Pause advertising if resolving list can be used as controllers are
* 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;
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.
*/
list_for_each_entry(params, &hdev->pend_le_conns, action) {
err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
if (err)
goto done;
}
/* 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.
*/
list_for_each_entry(params, &hdev->pend_le_reports, action) {
err = hci_le_add_accept_list_sync(hdev, params, &num_entries);
if (err)
goto done;
}
/* 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;
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;
}
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,
LE_SCAN_FILTER_DUP_ENABLE);
}
/* 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 (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)
{
/* Use Read LE Buffer Size V2 if supported */
if (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_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), &param, 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