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Bluetooth: hci_sync: Rework hci_suspend_notifier

Browse source 
This makes hci_suspend_notifier use the hci_*_sync which can be
executed synchronously which is allowed in the suspend_notifier and
simplifies a lot of the handling since the status of each command can
be checked inline so no other work need to be scheduled thus can be
performed without using of a state machine.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Luiz Augusto von Dentz 2021-10-27 16:59:00 -07:00 committed by Marcel Holtmann
parent d0b137062b
commit 182ee45da0
10 changed files with 651 additions and 639 deletions
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4
include/net/bluetooth/hci_core.h
View file

@ -523,7 +523,6 @@ struct hci_dev {
bool advertising_paused;
struct notifier_block suspend_notifier;
struct work_struct suspend_prepare;
enum suspended_state suspend_state_next;
enum suspended_state suspend_state;
bool scanning_paused;
@ -532,9 +531,6 @@ struct hci_dev {
bdaddr_t wake_addr;
u8 wake_addr_type;
wait_queue_head_t suspend_wait_q;
DECLARE_BITMAP(suspend_tasks, __SUSPEND_NUM_TASKS);
struct hci_conn_hash conn_hash;
struct list_head mgmt_pending;

3
include/net/bluetooth/hci_sync.h
View file

@ -92,3 +92,6 @@ int hci_set_powered_sync(struct hci_dev *hdev, u8 val);
int hci_start_discovery_sync(struct hci_dev *hdev);
int hci_stop_discovery_sync(struct hci_dev *hdev);
int hci_suspend_sync(struct hci_dev *hdev);
int hci_resume_sync(struct hci_dev *hdev);

10
net/bluetooth/hci_conn.c
View file

@ -900,16 +900,6 @@ void hci_le_conn_failed(struct hci_conn *conn, u8 status)
hci_conn_del(conn);
/* The suspend notifier is waiting for all devices to disconnect and an
* LE connect cancel will result in an hci_le_conn_failed. Once the last
* connection is deleted, we should also wake the suspend queue to
* complete suspend operations.
*/
if (list_empty(&hdev->conn_hash.list) &&
test_and_clear_bit(SUSPEND_DISCONNECTING, hdev->suspend_tasks)) {
wake_up(&hdev->suspend_wait_q);
}
/* Since we may have temporarily stopped the background scanning in
* favor of connection establishment, we should restart it.
*/

106
net/bluetooth/hci_core.c
View file

@ -2374,61 +2374,6 @@ void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
}
}
static void hci_suspend_clear_tasks(struct hci_dev *hdev)
{
int i;
for (i = 0; i < __SUSPEND_NUM_TASKS; i++)
clear_bit(i, hdev->suspend_tasks);
wake_up(&hdev->suspend_wait_q);
}
static int hci_suspend_wait_event(struct hci_dev *hdev)
{
#define WAKE_COND \
(find_first_bit(hdev->suspend_tasks, __SUSPEND_NUM_TASKS) == \
__SUSPEND_NUM_TASKS)
int i;
int ret = wait_event_timeout(hdev->suspend_wait_q,
WAKE_COND, SUSPEND_NOTIFIER_TIMEOUT);
if (ret == 0) {
bt_dev_err(hdev, "Timed out waiting for suspend events");
for (i = 0; i < __SUSPEND_NUM_TASKS; ++i) {
if (test_bit(i, hdev->suspend_tasks))
bt_dev_err(hdev, "Suspend timeout bit: %d", i);
clear_bit(i, hdev->suspend_tasks);
}
ret = -ETIMEDOUT;
} else {
ret = 0;
}
return ret;
}
static void hci_prepare_suspend(struct work_struct *work)
{
struct hci_dev *hdev =
container_of(work, struct hci_dev, suspend_prepare);
hci_dev_lock(hdev);
hci_req_prepare_suspend(hdev, hdev->suspend_state_next);
hci_dev_unlock(hdev);
}
static int hci_change_suspend_state(struct hci_dev *hdev,
enum suspended_state next)
{
hdev->suspend_state_next = next;
set_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
queue_work(hdev->req_workqueue, &hdev->suspend_prepare);
return hci_suspend_wait_event(hdev);
}
static void hci_clear_wake_reason(struct hci_dev *hdev)
{
hci_dev_lock(hdev);
@ -2565,7 +2510,6 @@ struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
INIT_WORK(&hdev->tx_work, hci_tx_work);
INIT_WORK(&hdev->power_on, hci_power_on);
INIT_WORK(&hdev->error_reset, hci_error_reset);
INIT_WORK(&hdev->suspend_prepare, hci_prepare_suspend);
hci_cmd_sync_init(hdev);
@ -2576,7 +2520,6 @@ struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
skb_queue_head_init(&hdev->raw_q);
init_waitqueue_head(&hdev->req_wait_q);
init_waitqueue_head(&hdev->suspend_wait_q);
INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout);
@ -2729,11 +2672,8 @@ void hci_unregister_dev(struct hci_dev *hdev)
hci_cmd_sync_clear(hdev);
if (!test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
hci_suspend_clear_tasks(hdev);
if (!test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks))
unregister_pm_notifier(&hdev->suspend_notifier);
cancel_work_sync(&hdev->suspend_prepare);
}
msft_unregister(hdev);
@ -2800,7 +2740,6 @@ EXPORT_SYMBOL(hci_release_dev);
int hci_suspend_dev(struct hci_dev *hdev)
{
int ret;
u8 state = BT_RUNNING;
bt_dev_dbg(hdev, "");
@ -2809,40 +2748,17 @@ int hci_suspend_dev(struct hci_dev *hdev)
hci_dev_test_flag(hdev, HCI_UNREGISTER))
return 0;
/* If powering down, wait for completion. */
if (mgmt_powering_down(hdev)) {
set_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks);
ret = hci_suspend_wait_event(hdev);
if (ret)
goto done;
}
/* If powering down don't attempt to suspend */
if (mgmt_powering_down(hdev))
return 0;
/* Suspend consists of two actions:
* - First, disconnect everything and make the controller not
* connectable (disabling scanning)
* - Second, program event filter/accept list and enable scan
*/
ret = hci_change_suspend_state(hdev, BT_SUSPEND_DISCONNECT);
if (ret)
goto clear;
hci_req_sync_lock(hdev);
ret = hci_suspend_sync(hdev);
hci_req_sync_unlock(hdev);
state = BT_SUSPEND_DISCONNECT;
/* Only configure accept list if device may wakeup. */
if (hdev->wakeup && hdev->wakeup(hdev)) {
ret = hci_change_suspend_state(hdev, BT_SUSPEND_CONFIGURE_WAKE);
if (!ret)
state = BT_SUSPEND_CONFIGURE_WAKE;
}
clear:
hci_clear_wake_reason(hdev);
mgmt_suspending(hdev, state);
mgmt_suspending(hdev, hdev->suspend_state);
done:
/* We always allow suspend even if suspend preparation failed and
* attempt to recover in resume.
*/
hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
return ret;
}
@ -2864,10 +2780,12 @@ int hci_resume_dev(struct hci_dev *hdev)
if (mgmt_powering_down(hdev))
return 0;
ret = hci_change_suspend_state(hdev, BT_RUNNING);
hci_req_sync_lock(hdev);
ret = hci_resume_sync(hdev);
hci_req_sync_unlock(hdev);
mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
hdev->wake_addr_type);
hdev->wake_addr_type);
hci_sock_dev_event(hdev, HCI_DEV_RESUME);
return ret;

71
net/bluetooth/hci_event.c
View file

@ -2414,9 +2414,14 @@ static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
{
struct hci_cp_disconnect *cp;
struct hci_conn_params *params;
struct hci_conn *conn;
bool mgmt_conn;
if (!status)
/* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
* otherwise cleanup the connection immediately.
*/
if (!status && !hdev->suspended)
return;
cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
@ -2426,7 +2431,10 @@ static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
if (conn) {
if (!conn)
goto unlock;
if (status) {
mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
conn->dst_type, status);
@ -2435,14 +2443,48 @@ static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
hci_enable_advertising(hdev);
}
/* If the disconnection failed for any reason, the upper layer
* does not retry to disconnect in current implementation.
* Hence, we need to do some basic cleanup here and re-enable
* advertising if necessary.
*/
hci_conn_del(conn);
goto done;
}
mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
if (conn->type == ACL_LINK) {
if (test_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
hci_remove_link_key(hdev, &conn->dst);
}
params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
if (params) {
switch (params->auto_connect) {
case HCI_AUTO_CONN_LINK_LOSS:
if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
break;
fallthrough;
case HCI_AUTO_CONN_DIRECT:
case HCI_AUTO_CONN_ALWAYS:
list_del_init(&params->action);
list_add(&params->action, &hdev->pend_le_conns);
break;
default:
break;
}
}
mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
cp->reason, mgmt_conn);
hci_disconn_cfm(conn, cp->reason);
done:
/* If the disconnection failed for any reason, the upper layer
* does not retry to disconnect in current implementation.
* Hence, we need to do some basic cleanup here and re-enable
* advertising if necessary.
*/
hci_conn_del(conn);
unlock:
hci_dev_unlock(hdev);
}
@ -3047,14 +3089,6 @@ static void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_conn_del(conn);
/* The suspend notifier is waiting for all devices to disconnect so
* clear the bit from pending tasks and inform the wait queue.
*/
if (list_empty(&hdev->conn_hash.list) &&
test_and_clear_bit(SUSPEND_DISCONNECTING, hdev->suspend_tasks)) {
wake_up(&hdev->suspend_wait_q);
}
unlock:
hci_dev_unlock(hdev);
}
@ -5575,8 +5609,9 @@ static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
return NULL;
/* Ignore if the device is blocked */
if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type))
/* Ignore if the device is blocked or hdev is suspended */
if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
hdev->suspended)
return NULL;
/* Most controller will fail if we try to create new connections

237
net/bluetooth/hci_request.c
View file

@ -492,9 +492,6 @@ void hci_req_add_le_scan_disable(struct hci_request *req, bool rpa_le_conn)
return;
}
if (hdev->suspended)
set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
if (use_ext_scan(hdev)) {
struct hci_cp_le_set_ext_scan_enable cp;
@ -868,8 +865,6 @@ void hci_req_add_le_passive_scan(struct hci_request *req)
if (hdev->suspended) {
window = hdev->le_scan_window_suspend;
interval = hdev->le_scan_int_suspend;
set_bit(SUSPEND_SCAN_ENABLE, hdev->suspend_tasks);
} else if (hci_is_le_conn_scanning(hdev)) {
window = hdev->le_scan_window_connect;
interval = hdev->le_scan_int_connect;
@ -902,59 +897,6 @@ void hci_req_add_le_passive_scan(struct hci_request *req)
addr_resolv);
}
static void hci_req_clear_event_filter(struct hci_request *req)
{
struct hci_cp_set_event_filter f;
if (!hci_dev_test_flag(req->hdev, HCI_BREDR_ENABLED))
return;
if (hci_dev_test_flag(req->hdev, HCI_EVENT_FILTER_CONFIGURED)) {
memset(&f, 0, sizeof(f));
f.flt_type = HCI_FLT_CLEAR_ALL;
hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &f);
}
}
static void hci_req_set_event_filter(struct hci_request *req)
{
struct bdaddr_list_with_flags *b;
struct hci_cp_set_event_filter f;
struct hci_dev *hdev = req->hdev;
u8 scan = SCAN_DISABLED;
bool scanning = test_bit(HCI_PSCAN, &hdev->flags);
if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
return;
/* Always clear event filter when starting */
hci_req_clear_event_filter(req);
list_for_each_entry(b, &hdev->accept_list, list) {
if (!hci_conn_test_flag(HCI_CONN_FLAG_REMOTE_WAKEUP,
b->current_flags))
continue;
memset(&f, 0, sizeof(f));
bacpy(&f.addr_conn_flt.bdaddr, &b->bdaddr);
f.flt_type = HCI_FLT_CONN_SETUP;
f.cond_type = HCI_CONN_SETUP_ALLOW_BDADDR;
f.addr_conn_flt.auto_accept = HCI_CONN_SETUP_AUTO_ON;
bt_dev_dbg(hdev, "Adding event filters for %pMR", &b->bdaddr);
hci_req_add(req, HCI_OP_SET_EVENT_FLT, sizeof(f), &f);
scan = SCAN_PAGE;
}
if (scan && !scanning) {
set_bit(SUSPEND_SCAN_ENABLE, hdev->suspend_tasks);
hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
} else if (!scan && scanning) {
set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
}
}
static void cancel_adv_timeout(struct hci_dev *hdev)
{
if (hdev->adv_instance_timeout) {
@ -1013,185 +955,6 @@ int hci_req_resume_adv_instances(struct hci_dev *hdev)
return hci_req_run(&req, NULL);
}
static void suspend_req_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
bt_dev_dbg(hdev, "Request complete opcode=0x%x, status=0x%x", opcode,
status);
if (test_bit(SUSPEND_SCAN_ENABLE, hdev->suspend_tasks) ||
test_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks)) {
clear_bit(SUSPEND_SCAN_ENABLE, hdev->suspend_tasks);
clear_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
wake_up(&hdev->suspend_wait_q);
}
if (test_bit(SUSPEND_SET_ADV_FILTER, hdev->suspend_tasks)) {
clear_bit(SUSPEND_SET_ADV_FILTER, hdev->suspend_tasks);
wake_up(&hdev->suspend_wait_q);
}
}
static void hci_req_prepare_adv_monitor_suspend(struct hci_request *req,
bool suspending)
{
struct hci_dev *hdev = req->hdev;
switch (hci_get_adv_monitor_offload_ext(hdev)) {
case HCI_ADV_MONITOR_EXT_MSFT:
if (suspending)
msft_suspend(hdev);
else
msft_resume(hdev);
break;
default:
return;
}
/* No need to block when enabling since it's on resume path */
if (hdev->suspended && suspending)
set_bit(SUSPEND_SET_ADV_FILTER, hdev->suspend_tasks);
}
/* Call with hci_dev_lock */
void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
{
int old_state;
struct hci_conn *conn;
struct hci_request req;
u8 page_scan;
int disconnect_counter;
if (next == hdev->suspend_state) {
bt_dev_dbg(hdev, "Same state before and after: %d", next);
goto done;
}
hdev->suspend_state = next;
hci_req_init(&req, hdev);
if (next == BT_SUSPEND_DISCONNECT) {
/* Mark device as suspended */
hdev->suspended = true;
/* Pause discovery if not already stopped */
old_state = hdev->discovery.state;
if (old_state != DISCOVERY_STOPPED) {
set_bit(SUSPEND_PAUSE_DISCOVERY, hdev->suspend_tasks);
hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
queue_work(hdev->req_workqueue, &hdev->discov_update);
}
hdev->discovery_paused = true;
hdev->discovery_old_state = old_state;
/* Stop directed advertising */
old_state = hci_dev_test_flag(hdev, HCI_ADVERTISING);
if (old_state) {
set_bit(SUSPEND_PAUSE_ADVERTISING, hdev->suspend_tasks);
cancel_delayed_work(&hdev->discov_off);
queue_delayed_work(hdev->req_workqueue,
&hdev->discov_off, 0);
}
/* Pause other advertisements */
if (hdev->adv_instance_cnt)
__hci_req_pause_adv_instances(&req);
hdev->advertising_paused = true;
hdev->advertising_old_state = old_state;
/* Disable page scan if enabled */
if (test_bit(HCI_PSCAN, &hdev->flags)) {
page_scan = SCAN_DISABLED;
hci_req_add(&req, HCI_OP_WRITE_SCAN_ENABLE, 1,
&page_scan);
set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
}
/* Disable LE passive scan if enabled */
if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
cancel_interleave_scan(hdev);
hci_req_add_le_scan_disable(&req, false);
}
/* Disable advertisement filters */
hci_req_prepare_adv_monitor_suspend(&req, true);
/* Prevent disconnects from causing scanning to be re-enabled */
hdev->scanning_paused = true;
/* Run commands before disconnecting */
hci_req_run(&req, suspend_req_complete);
disconnect_counter = 0;
/* Soft disconnect everything (power off) */
list_for_each_entry(conn, &hdev->conn_hash.list, list) {
hci_disconnect(conn, HCI_ERROR_REMOTE_POWER_OFF);
disconnect_counter++;
}
if (disconnect_counter > 0) {
bt_dev_dbg(hdev,
"Had %d disconnects. Will wait on them",
disconnect_counter);
set_bit(SUSPEND_DISCONNECTING, hdev->suspend_tasks);
}
} else if (next == BT_SUSPEND_CONFIGURE_WAKE) {
/* Unpause to take care of updating scanning params */
hdev->scanning_paused = false;
/* Enable event filter for paired devices */
hci_req_set_event_filter(&req);
/* Enable passive scan at lower duty cycle */
__hci_update_background_scan(&req);
/* Pause scan changes again. */
hdev->scanning_paused = true;
hci_req_run(&req, suspend_req_complete);
} else {
hdev->suspended = false;
hdev->scanning_paused = false;
/* Clear any event filters and restore scan state */
hci_req_clear_event_filter(&req);
__hci_req_update_scan(&req);
/* Reset passive/background scanning to normal */
__hci_update_background_scan(&req);
/* Enable all of the advertisement filters */
hci_req_prepare_adv_monitor_suspend(&req, false);
/* Unpause directed advertising */
hdev->advertising_paused = false;
if (hdev->advertising_old_state) {
set_bit(SUSPEND_UNPAUSE_ADVERTISING,
hdev->suspend_tasks);
hci_dev_set_flag(hdev, HCI_ADVERTISING);
queue_work(hdev->req_workqueue,
&hdev->discoverable_update);
hdev->advertising_old_state = 0;
}
/* Resume other advertisements */
if (hdev->adv_instance_cnt)
__hci_req_resume_adv_instances(&req);
/* Unpause discovery */
hdev->discovery_paused = false;
if (hdev->discovery_old_state != DISCOVERY_STOPPED &&
hdev->discovery_old_state != DISCOVERY_STOPPING) {
set_bit(SUSPEND_UNPAUSE_DISCOVERY, hdev->suspend_tasks);
hci_discovery_set_state(hdev, DISCOVERY_STARTING);
queue_work(hdev->req_workqueue, &hdev->discov_update);
}
hci_req_run(&req, suspend_req_complete);
}
hdev->suspend_state = next;
done:
clear_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
wake_up(&hdev->suspend_wait_q);
}
static bool adv_cur_instance_is_scannable(struct hci_dev *hdev)
{
return hci_adv_instance_is_scannable(hdev, hdev->cur_adv_instance);

294
net/bluetooth/hci_sync.c
View file

@ -1410,9 +1410,6 @@ int hci_scan_disable_sync(struct hci_dev *hdev)
return 0;
}
if (hdev->suspended)
set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
err = hci_le_set_scan_enable_sync(hdev, LE_SCAN_DISABLE, 0x00);
if (err) {
bt_dev_err(hdev, "Unable to disable scanning: %d", err);
@ -1642,10 +1639,11 @@ static int hci_le_add_accept_list_sync(struct hci_dev *hdev,
return 0;
}
/* This function disables all advertising instances (including 0x00) */
/* This function disables/pause all advertising instances */
static int hci_pause_advertising_sync(struct hci_dev *hdev)
{
int err;
int old_state;
/* If there are no instances or advertising has already been paused
* there is nothing to do.
@ -1653,6 +1651,21 @@ static int hci_pause_advertising_sync(struct hci_dev *hdev)
if (!hdev->adv_instance_cnt || 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.
@ -1667,11 +1680,12 @@ static int hci_pause_advertising_sync(struct hci_dev *hdev)
cancel_adv_timeout(hdev);
hdev->advertising_paused = true;
hdev->advertising_old_state = old_state;
return 0;
}
/* This function enables all user advertising instances (excluding 0x00) */
/* This function enables all user advertising instances */
static int hci_resume_advertising_sync(struct hci_dev *hdev)
{
struct adv_info *adv, *tmp;
@ -1681,6 +1695,14 @@ static int hci_resume_advertising_sync(struct hci_dev *hdev)
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);
queue_work(hdev->req_workqueue, &hdev->discoverable_update);
hdev->advertising_old_state = 0;
}
bt_dev_dbg(hdev, "Resuming advertising instances");
if (ext_adv_capable(hdev)) {
@ -2002,8 +2024,6 @@ int hci_passive_scan_sync(struct hci_dev *hdev)
if (hdev->suspended) {
window = hdev->le_scan_window_suspend;
interval = hdev->le_scan_int_suspend;
set_bit(SUSPEND_SCAN_ENABLE, hdev->suspend_tasks);
} else if (hci_is_le_conn_scanning(hdev)) {
window = hdev->le_scan_window_connect;
interval = hdev->le_scan_int_connect;
@ -2937,6 +2957,13 @@ static int hci_set_event_mask_sync(struct hci_dev *hdev)
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));
@ -2949,7 +2976,12 @@ static int hci_set_event_mask_sync(struct hci_dev *hdev)
* control related events.
*/
if (hdev->commands[0] & 0x20) {
events[0] |= 0x10; /* Disconnection Complete */
/* 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 */
}
@ -4033,9 +4065,6 @@ int hci_dev_close_sync(struct hci_dev *hdev)
clear_bit(HCI_RUNNING, &hdev->flags);
hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
if (test_and_clear_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks))
wake_up(&hdev->suspend_wait_q);
/* After this point our queues are empty and no tasks are scheduled. */
hdev->close(hdev);
@ -4299,6 +4328,20 @@ static int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
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 err;
}
/* This function perform power off HCI command sequence as follows:
*
* Clear Advertising
@ -4308,7 +4351,6 @@ static int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
*/
static int hci_power_off_sync(struct hci_dev *hdev)
{
struct hci_conn *conn;
int err;
/* If controller is already down there is nothing to do */
@ -4330,10 +4372,10 @@ static int hci_power_off_sync(struct hci_dev *hdev)
if (err)
return err;
list_for_each_entry(conn, &hdev->conn_hash.list, list) {
/* 0x15 == Terminated due to Power Off */
hci_abort_conn_sync(hdev, conn, 0x15);
}
/* 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);
}
@ -4535,3 +4577,223 @@ int hci_start_discovery_sync(struct hci_dev *hdev)
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;
/* Always clear event filter when starting */
hci_clear_event_filter_sync(hdev);
list_for_each_entry(b, &hdev->accept_list, list) {
if (!hci_conn_test_flag(HCI_CONN_FLAG_REMOTE_WAKEUP,
b->current_flags))
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 performs the HCI suspend procedures in the follow order:
*
* Pause discovery (active scanning/inquiry)
* Pause Directed Advertising/Advertising
* 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);
/* Disable page scan if enabled */
if (test_bit(HCI_PSCAN, &hdev->flags))
hci_write_scan_enable_sync(hdev, SCAN_DISABLED);
/* Suspend monitor filters */
hci_suspend_monitor_sync(hdev);
/* Prevent disconnects from causing scanning to be re-enabled */
hdev->scanning_paused = true;
/* 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;
}
/* 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;
/* Update event mask so only the allowed event can wakeup the host */
hci_set_event_mask_sync(hdev);
/* 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 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;
hdev->scanning_paused = false;
/* Restore event mask */
hci_set_event_mask_sync(hdev);
/* Clear any event filters and restore scan state */
hci_clear_event_filter_sync(hdev);
hci_update_scan_sync(hdev);
/* Reset passive scanning to normal */
hci_update_passive_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;
}

39
net/bluetooth/mgmt.c
View file

@ -5171,13 +5171,6 @@ void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status)
}
hci_dev_unlock(hdev);
/* Handle suspend notifier */
if (test_and_clear_bit(SUSPEND_UNPAUSE_DISCOVERY,
hdev->suspend_tasks)) {
bt_dev_dbg(hdev, "Unpaused discovery");
wake_up(&hdev->suspend_wait_q);
}
}
static bool discovery_type_is_valid(struct hci_dev *hdev, uint8_t type,
@ -5217,14 +5210,7 @@ static void start_discovery_complete(struct hci_dev *hdev, void *data, int err)
cmd->param, 1);
mgmt_pending_free(cmd);
/* Handle suspend notifier */
if (test_and_clear_bit(SUSPEND_UNPAUSE_DISCOVERY,
hdev->suspend_tasks)) {
bt_dev_dbg(hdev, "Unpaused discovery");
wake_up(&hdev->suspend_wait_q);
}
hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED:
DISCOVERY_FINDING);
}
@ -5446,12 +5432,6 @@ void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status)
}
hci_dev_unlock(hdev);
/* Handle suspend notifier */
if (test_and_clear_bit(SUSPEND_PAUSE_DISCOVERY, hdev->suspend_tasks)) {
bt_dev_dbg(hdev, "Paused discovery");
wake_up(&hdev->suspend_wait_q);
}
}
static void stop_discovery_complete(struct hci_dev *hdev, void *data, int err)
@ -5464,12 +5444,6 @@ static void stop_discovery_complete(struct hci_dev *hdev, void *data, int err)
cmd->param, 1);
mgmt_pending_free(cmd);
/* Handle suspend notifier */
if (test_and_clear_bit(SUSPEND_PAUSE_DISCOVERY, hdev->suspend_tasks)) {
bt_dev_dbg(hdev, "Paused discovery");
wake_up(&hdev->suspend_wait_q);
}
if (!err)
hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
}
@ -5709,17 +5683,6 @@ static void set_advertising_complete(struct hci_dev *hdev, void *data, int err)
if (match.sk)
sock_put(match.sk);
/* Handle suspend notifier */
if (test_and_clear_bit(SUSPEND_PAUSE_ADVERTISING,
hdev->suspend_tasks)) {
bt_dev_dbg(hdev, "Paused advertising");
wake_up(&hdev->suspend_wait_q);
} else if (test_and_clear_bit(SUSPEND_UNPAUSE_ADVERTISING,
hdev->suspend_tasks)) {
bt_dev_dbg(hdev, "Unpaused advertising");
wake_up(&hdev->suspend_wait_q);
}
/* If "Set Advertising" was just disabled and instance advertising was
* set up earlier, then re-enable multi-instance advertising.
*/

511
net/bluetooth/msft.c
View file

@ -93,7 +93,7 @@ struct msft_data {
struct list_head handle_map;
__u16 pending_add_handle;
__u16 pending_remove_handle;
__u8 reregistering;
__u8 resuming;
__u8 suspending;
__u8 filter_enabled;
};
@ -156,7 +156,6 @@ static bool read_supported_features(struct hci_dev *hdev,
return false;
}
/* This function requires the caller holds hdev->lock */
static void reregister_monitor(struct hci_dev *hdev, int handle)
{
struct adv_monitor *monitor;
@ -166,8 +165,8 @@ static void reregister_monitor(struct hci_dev *hdev, int handle)
while (1) {
monitor = idr_get_next(&hdev->adv_monitors_idr, &handle);
if (!monitor) {
/* All monitors have been reregistered */
msft->reregistering = false;
/* All monitors have been resumed */
msft->resuming = false;
hci_update_passive_scan(hdev);
return;
}
@ -185,67 +184,317 @@ static void reregister_monitor(struct hci_dev *hdev, int handle)
}
}
/* This function requires the caller holds hdev->lock */
static void remove_monitor_on_suspend(struct hci_dev *hdev, int handle)
/* is_mgmt = true matches the handle exposed to userspace via mgmt.
* is_mgmt = false matches the handle used by the msft controller.
* This function requires the caller holds hdev->lock
*/
static struct msft_monitor_advertisement_handle_data *msft_find_handle_data
(struct hci_dev *hdev, u16 handle, bool is_mgmt)
{
struct msft_monitor_advertisement_handle_data *entry;
struct msft_data *msft = hdev->msft_data;
list_for_each_entry(entry, &msft->handle_map, list) {
if (is_mgmt && entry->mgmt_handle == handle)
return entry;
if (!is_mgmt && entry->msft_handle == handle)
return entry;
}
return NULL;
}
static void msft_le_monitor_advertisement_cb(struct hci_dev *hdev,
u8 status, u16 opcode,
struct sk_buff *skb)
{
struct msft_rp_le_monitor_advertisement *rp;
struct adv_monitor *monitor;
struct msft_monitor_advertisement_handle_data *handle_data;
struct msft_data *msft = hdev->msft_data;
hci_dev_lock(hdev);
monitor = idr_find(&hdev->adv_monitors_idr, msft->pending_add_handle);
if (!monitor) {
bt_dev_err(hdev, "msft add advmon: monitor %u is not found!",
msft->pending_add_handle);
status = HCI_ERROR_UNSPECIFIED;
goto unlock;
}
if (status)
goto unlock;
rp = (struct msft_rp_le_monitor_advertisement *)skb->data;
if (skb->len < sizeof(*rp)) {
status = HCI_ERROR_UNSPECIFIED;
goto unlock;
}
handle_data = kmalloc(sizeof(*handle_data), GFP_KERNEL);
if (!handle_data) {
status = HCI_ERROR_UNSPECIFIED;
goto unlock;
}
handle_data->mgmt_handle = monitor->handle;
handle_data->msft_handle = rp->handle;
INIT_LIST_HEAD(&handle_data->list);
list_add(&handle_data->list, &msft->handle_map);
monitor->state = ADV_MONITOR_STATE_OFFLOADED;
unlock:
if (status && monitor)
hci_free_adv_monitor(hdev, monitor);
hci_dev_unlock(hdev);
if (!msft->resuming)
hci_add_adv_patterns_monitor_complete(hdev, status);
}
static void msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
u8 status, u16 opcode,
struct sk_buff *skb)
{
struct msft_cp_le_cancel_monitor_advertisement *cp;
struct msft_rp_le_cancel_monitor_advertisement *rp;
struct adv_monitor *monitor;
struct msft_monitor_advertisement_handle_data *handle_data;
struct msft_data *msft = hdev->msft_data;
int err;
bool pending;
while (1) {
monitor = idr_get_next(&hdev->adv_monitors_idr, &handle);
if (!monitor) {
/* All monitors have been removed */
msft->suspending = false;
hci_update_background_scan(hdev);
if (status)
goto done;
rp = (struct msft_rp_le_cancel_monitor_advertisement *)skb->data;
if (skb->len < sizeof(*rp)) {
status = HCI_ERROR_UNSPECIFIED;
goto done;
}
hci_dev_lock(hdev);
cp = hci_sent_cmd_data(hdev, hdev->msft_opcode);
handle_data = msft_find_handle_data(hdev, cp->handle, false);
if (handle_data) {
monitor = idr_find(&hdev->adv_monitors_idr,
handle_data->mgmt_handle);
if (monitor && monitor->state == ADV_MONITOR_STATE_OFFLOADED)
monitor->state = ADV_MONITOR_STATE_REGISTERED;
/* Do not free the monitor if it is being removed due to
* suspend. It will be re-monitored on resume.
*/
if (monitor && !msft->suspending)
hci_free_adv_monitor(hdev, monitor);
list_del(&handle_data->list);
kfree(handle_data);
}
/* If remove all monitors is required, we need to continue the process
* here because the earlier it was paused when waiting for the
* response from controller.
*/
if (msft->pending_remove_handle == 0) {
pending = hci_remove_all_adv_monitor(hdev, &err);
if (pending) {
hci_dev_unlock(hdev);
return;
}
msft->pending_remove_handle = (u16)handle;
err = __msft_remove_monitor(hdev, monitor, handle);
if (err)
status = HCI_ERROR_UNSPECIFIED;
}
/* If success, return and wait for monitor removed callback */
if (!err)
return;
hci_dev_unlock(hdev);
done:
if (!msft->suspending)
hci_remove_adv_monitor_complete(hdev, status);
}
static int msft_remove_monitor_sync(struct hci_dev *hdev,
struct adv_monitor *monitor)
{
struct msft_cp_le_cancel_monitor_advertisement cp;
struct msft_monitor_advertisement_handle_data *handle_data;
struct sk_buff *skb;
u8 status;
handle_data = msft_find_handle_data(hdev, monitor->handle, true);
/* If no matched handle, just remove without telling controller */
if (!handle_data)
return -ENOENT;
cp.sub_opcode = MSFT_OP_LE_CANCEL_MONITOR_ADVERTISEMENT;
cp.handle = handle_data->msft_handle;
skb = __hci_cmd_sync(hdev, hdev->msft_opcode, sizeof(cp), &cp,
HCI_CMD_TIMEOUT);
if (IS_ERR(skb))
return PTR_ERR(skb);
status = skb->data[0];
skb_pull(skb, 1);
msft_le_cancel_monitor_advertisement_cb(hdev, status, hdev->msft_opcode,
skb);
return status;
}
/* This function requires the caller holds hci_req_sync_lock */
int msft_suspend_sync(struct hci_dev *hdev)
{
struct msft_data *msft = hdev->msft_data;
struct adv_monitor *monitor;
int handle = 0;
if (!msft || !msft_monitor_supported(hdev))
return 0;
msft->suspending = true;
while (1) {
monitor = idr_get_next(&hdev->adv_monitors_idr, &handle);
if (!monitor)
break;
msft_remove_monitor_sync(hdev, monitor);
/* Otherwise free the monitor and keep removing */
hci_free_adv_monitor(hdev, monitor);
handle++;
}
/* All monitors have been removed */
msft->suspending = false;
return 0;
}
/* This function requires the caller holds hdev->lock */
void msft_suspend(struct hci_dev *hdev)
static bool msft_monitor_rssi_valid(struct adv_monitor *monitor)
{
struct msft_data *msft = hdev->msft_data;
struct adv_rssi_thresholds *r = &monitor->rssi;
if (!msft)
return;
if (r->high_threshold < MSFT_RSSI_THRESHOLD_VALUE_MIN ||
r->high_threshold > MSFT_RSSI_THRESHOLD_VALUE_MAX ||
r->low_threshold < MSFT_RSSI_THRESHOLD_VALUE_MIN ||
r->low_threshold > MSFT_RSSI_THRESHOLD_VALUE_MAX)
return false;
if (msft_monitor_supported(hdev)) {
msft->suspending = true;
/* Quitely remove all monitors on suspend to avoid waking up
* the system.
*/
remove_monitor_on_suspend(hdev, 0);
}
/* High_threshold_timeout is not supported,
* once high_threshold is reached, events are immediately reported.
*/
if (r->high_threshold_timeout != 0)
return false;
if (r->low_threshold_timeout > MSFT_RSSI_LOW_TIMEOUT_MAX)
return false;
/* Sampling period from 0x00 to 0xFF are all allowed */
return true;
}
/* This function requires the caller holds hdev->lock */
void msft_resume(struct hci_dev *hdev)
static bool msft_monitor_pattern_valid(struct adv_monitor *monitor)
{
return msft_monitor_rssi_valid(monitor);
/* No additional check needed for pattern-based monitor */
}
static int msft_add_monitor_sync(struct hci_dev *hdev,
struct adv_monitor *monitor)
{
struct msft_cp_le_monitor_advertisement *cp;
struct msft_le_monitor_advertisement_pattern_data *pattern_data;
struct msft_le_monitor_advertisement_pattern *pattern;
struct adv_pattern *entry;
size_t total_size = sizeof(*cp) + sizeof(*pattern_data);
ptrdiff_t offset = 0;
u8 pattern_count = 0;
struct sk_buff *skb;
u8 status;
if (!msft_monitor_pattern_valid(monitor))
return -EINVAL;
list_for_each_entry(entry, &monitor->patterns, list) {
pattern_count++;
total_size += sizeof(*pattern) + entry->length;
}
cp = kmalloc(total_size, GFP_KERNEL);
if (!cp)
return -ENOMEM;
cp->sub_opcode = MSFT_OP_LE_MONITOR_ADVERTISEMENT;
cp->rssi_high = monitor->rssi.high_threshold;
cp->rssi_low = monitor->rssi.low_threshold;
cp->rssi_low_interval = (u8)monitor->rssi.low_threshold_timeout;
cp->rssi_sampling_period = monitor->rssi.sampling_period;
cp->cond_type = MSFT_MONITOR_ADVERTISEMENT_TYPE_PATTERN;
pattern_data = (void *)cp->data;
pattern_data->count = pattern_count;
list_for_each_entry(entry, &monitor->patterns, list) {
pattern = (void *)(pattern_data->data + offset);
/* the length also includes data_type and offset */
pattern->length = entry->length + 2;
pattern->data_type = entry->ad_type;
pattern->start_byte = entry->offset;
memcpy(pattern->pattern, entry->value, entry->length);
offset += sizeof(*pattern) + entry->length;
}
skb = __hci_cmd_sync(hdev, hdev->msft_opcode, total_size, cp,
HCI_CMD_TIMEOUT);
kfree(cp);
if (IS_ERR(skb))
return PTR_ERR(skb);
status = skb->data[0];
skb_pull(skb, 1);
msft_le_monitor_advertisement_cb(hdev, status, hdev->msft_opcode, skb);
return status;
}
/* This function requires the caller holds hci_req_sync_lock */
int msft_resume_sync(struct hci_dev *hdev)
{
struct msft_data *msft = hdev->msft_data;
struct adv_monitor *monitor;
int handle = 0;
if (!msft)
return;
if (!msft || !msft_monitor_supported(hdev))
return 0;
if (msft_monitor_supported(hdev)) {
msft->reregistering = true;
/* Monitors are removed on suspend, so we need to add all
* monitors on resume.
*/
reregister_monitor(hdev, 0);
msft->resuming = true;
while (1) {
monitor = idr_get_next(&hdev->adv_monitors_idr, &handle);
if (!monitor)
break;
msft_add_monitor_sync(hdev, monitor);
handle++;
}
/* All monitors have been resumed */
msft->resuming = false;
return 0;
}
void msft_do_open(struct hci_dev *hdev)
@ -275,7 +524,7 @@ void msft_do_open(struct hci_dev *hdev)
}
if (msft_monitor_supported(hdev)) {
msft->reregistering = true;
msft->resuming = true;
msft_set_filter_enable(hdev, true);
/* Monitors get removed on power off, so we need to explicitly
* tell the controller to re-monitor.
@ -381,151 +630,6 @@ __u64 msft_get_features(struct hci_dev *hdev)
return msft ? msft->features : 0;
}
/* is_mgmt = true matches the handle exposed to userspace via mgmt.
* is_mgmt = false matches the handle used by the msft controller.
* This function requires the caller holds hdev->lock
*/
static struct msft_monitor_advertisement_handle_data *msft_find_handle_data
(struct hci_dev *hdev, u16 handle, bool is_mgmt)
{
struct msft_monitor_advertisement_handle_data *entry;
struct msft_data *msft = hdev->msft_data;
list_for_each_entry(entry, &msft->handle_map, list) {
if (is_mgmt && entry->mgmt_handle == handle)
return entry;
if (!is_mgmt && entry->msft_handle == handle)
return entry;
}
return NULL;
}
static void msft_le_monitor_advertisement_cb(struct hci_dev *hdev,
u8 status, u16 opcode,
struct sk_buff *skb)
{
struct msft_rp_le_monitor_advertisement *rp;
struct adv_monitor *monitor;
struct msft_monitor_advertisement_handle_data *handle_data;
struct msft_data *msft = hdev->msft_data;
hci_dev_lock(hdev);
monitor = idr_find(&hdev->adv_monitors_idr, msft->pending_add_handle);
if (!monitor) {
bt_dev_err(hdev, "msft add advmon: monitor %u is not found!",
msft->pending_add_handle);
status = HCI_ERROR_UNSPECIFIED;
goto unlock;
}
if (status)
goto unlock;
rp = (struct msft_rp_le_monitor_advertisement *)skb->data;
if (skb->len < sizeof(*rp)) {
status = HCI_ERROR_UNSPECIFIED;
goto unlock;
}
handle_data = kmalloc(sizeof(*handle_data), GFP_KERNEL);
if (!handle_data) {
status = HCI_ERROR_UNSPECIFIED;
goto unlock;
}
handle_data->mgmt_handle = monitor->handle;
handle_data->msft_handle = rp->handle;
INIT_LIST_HEAD(&handle_data->list);
list_add(&handle_data->list, &msft->handle_map);
monitor->state = ADV_MONITOR_STATE_OFFLOADED;
unlock:
if (status && monitor)
hci_free_adv_monitor(hdev, monitor);
/* If in restart/reregister sequence, keep registering. */
if (msft->reregistering)
reregister_monitor(hdev, msft->pending_add_handle + 1);
hci_dev_unlock(hdev);
if (!msft->reregistering)
hci_add_adv_patterns_monitor_complete(hdev, status);
}
static void msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
u8 status, u16 opcode,
struct sk_buff *skb)
{
struct msft_cp_le_cancel_monitor_advertisement *cp;
struct msft_rp_le_cancel_monitor_advertisement *rp;
struct adv_monitor *monitor;
struct msft_monitor_advertisement_handle_data *handle_data;
struct msft_data *msft = hdev->msft_data;
int err;
bool pending;
if (status)
goto done;
rp = (struct msft_rp_le_cancel_monitor_advertisement *)skb->data;
if (skb->len < sizeof(*rp)) {
status = HCI_ERROR_UNSPECIFIED;
goto done;
}
hci_dev_lock(hdev);
cp = hci_sent_cmd_data(hdev, hdev->msft_opcode);
handle_data = msft_find_handle_data(hdev, cp->handle, false);
if (handle_data) {
monitor = idr_find(&hdev->adv_monitors_idr,
handle_data->mgmt_handle);
if (monitor && monitor->state == ADV_MONITOR_STATE_OFFLOADED)
monitor->state = ADV_MONITOR_STATE_REGISTERED;
/* Do not free the monitor if it is being removed due to
* suspend. It will be re-monitored on resume.
*/
if (monitor && !msft->suspending)
hci_free_adv_monitor(hdev, monitor);
list_del(&handle_data->list);
kfree(handle_data);
}
/* If in suspend/remove sequence, keep removing. */
if (msft->suspending)
remove_monitor_on_suspend(hdev,
msft->pending_remove_handle + 1);
/* If remove all monitors is required, we need to continue the process
* here because the earlier it was paused when waiting for the
* response from controller.
*/
if (msft->pending_remove_handle == 0) {
pending = hci_remove_all_adv_monitor(hdev, &err);
if (pending) {
hci_dev_unlock(hdev);
return;
}
if (err)
status = HCI_ERROR_UNSPECIFIED;
}
hci_dev_unlock(hdev);
done:
if (!msft->suspending)
hci_remove_adv_monitor_complete(hdev, status);
}
static void msft_le_set_advertisement_filter_enable_cb(struct hci_dev *hdev,
u8 status, u16 opcode,
struct sk_buff *skb)
@ -560,35 +664,6 @@ static void msft_le_set_advertisement_filter_enable_cb(struct hci_dev *hdev,
hci_dev_unlock(hdev);
}
static bool msft_monitor_rssi_valid(struct adv_monitor *monitor)
{
struct adv_rssi_thresholds *r = &monitor->rssi;
if (r->high_threshold < MSFT_RSSI_THRESHOLD_VALUE_MIN ||
r->high_threshold > MSFT_RSSI_THRESHOLD_VALUE_MAX ||
r->low_threshold < MSFT_RSSI_THRESHOLD_VALUE_MIN ||
r->low_threshold > MSFT_RSSI_THRESHOLD_VALUE_MAX)
return false;
/* High_threshold_timeout is not supported,
* once high_threshold is reached, events are immediately reported.
*/
if (r->high_threshold_timeout != 0)
return false;
if (r->low_threshold_timeout > MSFT_RSSI_LOW_TIMEOUT_MAX)
return false;
/* Sampling period from 0x00 to 0xFF are all allowed */
return true;
}
static bool msft_monitor_pattern_valid(struct adv_monitor *monitor)
{
return msft_monitor_rssi_valid(monitor);
/* No additional check needed for pattern-based monitor */
}
/* This function requires the caller holds hdev->lock */
static int __msft_add_monitor_pattern(struct hci_dev *hdev,
struct adv_monitor *monitor)
@ -656,7 +731,7 @@ int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor)
if (!msft)
return -EOPNOTSUPP;
if (msft->reregistering || msft->suspending)
if (msft->resuming || msft->suspending)
return -EBUSY;
return __msft_add_monitor_pattern(hdev, monitor);
@ -700,7 +775,7 @@ int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor,
if (!msft)
return -EOPNOTSUPP;
if (msft->reregistering || msft->suspending)
if (msft->resuming || msft->suspending)
return -EBUSY;
return __msft_remove_monitor(hdev, monitor, handle);

15
net/bluetooth/msft.h
View file

@ -24,8 +24,8 @@ int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor,
u16 handle);
void msft_req_add_set_filter_enable(struct hci_request *req, bool enable);
int msft_set_filter_enable(struct hci_dev *hdev, bool enable);
void msft_suspend(struct hci_dev *hdev);
void msft_resume(struct hci_dev *hdev);
int msft_suspend_sync(struct hci_dev *hdev);
int msft_resume_sync(struct hci_dev *hdev);
bool msft_curve_validity(struct hci_dev *hdev);
#else
@ -61,8 +61,15 @@ static inline int msft_set_filter_enable(struct hci_dev *hdev, bool enable)
return -EOPNOTSUPP;
}
static inline void msft_suspend(struct hci_dev *hdev) {}
static inline void msft_resume(struct hci_dev *hdev) {}
static inline int msft_suspend_sync(struct hci_dev *hdev)
{
return -EOPNOTSUPP;
}
static inline int msft_resume_sync(struct hci_dev *hdev)
{
return -EOPNOTSUPP;
}
static inline bool msft_curve_validity(struct hci_dev *hdev)
{