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v811_spc009/system/bt/bta/dm/bta_dm_pm.cc

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/******************************************************************************
*
* Copyright 2003-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the action functions for device manager state
* machine.
*
******************************************************************************/
#include <base/bind.h>
#include <cstdint>
#include <mutex>
#include "bta/dm/bta_dm_int.h"
#include "bta/include/bta_api.h"
#include "bta/include/bta_dm_api.h"
#include "bta/sys/bta_sys.h"
#include "device/include/controller.h"
#include "main/shim/dumpsys.h"
#include "osi/include/log.h"
#include "stack/include/acl_api.h"
#include "stack/include/btu.h" // do_in_main_thread
#include "types/raw_address.h"
static void bta_dm_pm_cback(tBTA_SYS_CONN_STATUS status, uint8_t id,
uint8_t app_id, const RawAddress& peer_addr);
static void bta_dm_pm_set_mode(const RawAddress& peer_addr,
tBTA_DM_PM_ACTION pm_mode,
tBTA_DM_PM_REQ pm_req);
static void bta_dm_pm_timer_cback(void* data);
static void bta_dm_pm_btm_cback(const RawAddress& bd_addr,
tBTM_PM_STATUS status, uint16_t value,
tHCI_STATUS hci_status);
static bool bta_dm_pm_park(const RawAddress& peer_addr);
void bta_dm_pm_sniff(tBTA_DM_PEER_DEVICE* p_peer_dev, uint8_t index);
static bool bta_dm_pm_is_sco_active();
static int bta_dm_get_sco_index();
static void bta_dm_pm_hid_check(bool bScoActive);
static void bta_dm_pm_stop_timer_by_index(tBTA_PM_TIMER* p_timer,
uint8_t timer_idx);
#if (BTA_HH_INCLUDED == TRUE)
#include "../hh/bta_hh_int.h"
/* BTA_DM_PM_SSR1 will be dedicated for HH SSR setting entry, no other profile
* can use it */
#define BTA_DM_PM_SSR_HH BTA_DM_PM_SSR1
#endif
static void bta_dm_pm_ssr(const RawAddress& peer_addr, int ssr);
tBTA_DM_CONNECTED_SRVCS bta_dm_conn_srvcs;
static std::recursive_mutex pm_timer_schedule_mutex;
static std::recursive_mutex pm_timer_state_mutex;
/*******************************************************************************
*
* Function bta_dm_init_pm
*
* Description Initializes the BT low power manager
*
*
* Returns void
*
******************************************************************************/
void bta_dm_init_pm(void) {
memset(&bta_dm_conn_srvcs, 0x00, sizeof(bta_dm_conn_srvcs));
/* if there are no power manger entries, so not register */
if (p_bta_dm_pm_cfg[0].app_id != 0) {
bta_sys_pm_register(bta_dm_pm_cback);
BTM_PmRegister((BTM_PM_REG_SET), &bta_dm_cb.pm_id, bta_dm_pm_btm_cback);
}
/* Need to initialize all PM timer service IDs */
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
for (int j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++)
bta_dm_cb.pm_timer[i].srvc_id[j] = BTA_ID_MAX;
}
}
/*******************************************************************************
*
* Function bta_dm_disable_pm
*
* Description Disable PM
*
*
* Returns void
*
******************************************************************************/
void bta_dm_disable_pm(void) {
BTM_PmRegister(BTM_PM_DEREG, &bta_dm_cb.pm_id, bta_dm_pm_btm_cback);
/*
* Deregister the PM callback from the system handling to prevent
* re-enabling the PM timers after this call if the callback is invoked.
*/
bta_sys_pm_register(NULL);
/* Need to stop all active timers. */
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
for (int j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], j);
bta_dm_cb.pm_timer[i].pm_action[j] = BTA_DM_PM_NO_ACTION;
}
}
}
/*******************************************************************************
*
* Function bta_dm_get_av_count
*
* Description Get the number of connected AV
*
*
* Returns number of av connections
*
******************************************************************************/
uint8_t bta_dm_get_av_count(void) {
uint8_t count = 0;
for (int i = 0; i < bta_dm_conn_srvcs.count; i++) {
if (bta_dm_conn_srvcs.conn_srvc[i].id == BTA_ID_AV) ++count;
}
return count;
}
/*******************************************************************************
*
* Function bta_dm_pm_stop_timer
*
* Description stop a PM timer
*
*
* Returns void
*
******************************************************************************/
static void bta_dm_pm_stop_timer(const RawAddress& peer_addr) {
APPL_TRACE_DEBUG("%s: ", __func__);
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
if (bta_dm_cb.pm_timer[i].in_use &&
bta_dm_cb.pm_timer[i].peer_bdaddr == peer_addr) {
for (int j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], j);
/*
* TODO: For now, stopping the timer does not reset
* pm_action[j].
* The reason is because some of the internal logic that
* (re)assigns the pm_action[] values is taking into account
* the older value; e.g., see the pm_action[] assignment in
* function bta_dm_pm_start_timer().
* Such subtlety in the execution logic is error prone, and
* should be eliminiated in the future.
*/
}
break;
}
}
}
/*******************************************************************************
*
* Function bta_pm_action_to_timer_idx
*
* Description convert power mode into timer index for each connected
* device
*
*
* Returns index of the power mode delay timer
*
******************************************************************************/
static uint8_t bta_pm_action_to_timer_idx(uint8_t pm_action) {
if (pm_action == BTA_DM_PM_SUSPEND)
return BTA_DM_PM_SUSPEND_TIMER_IDX;
else if (pm_action == BTA_DM_PM_PARK)
return BTA_DM_PM_PARK_TIMER_IDX;
else if ((pm_action & BTA_DM_PM_SNIFF) == BTA_DM_PM_SNIFF)
return BTA_DM_PM_SNIFF_TIMER_IDX;
/* Active, no preference, no action and retry */
return BTA_DM_PM_MODE_TIMER_MAX;
}
/*******************************************************************************
*
* Function bta_dm_pm_stop_timer_by_mode
*
* Description stop a PM timer
*
*
* Returns void
*
******************************************************************************/
static void bta_dm_pm_stop_timer_by_mode(const RawAddress& peer_addr,
uint8_t power_mode) {
const uint8_t timer_idx = bta_pm_action_to_timer_idx(power_mode);
if (timer_idx == BTA_DM_PM_MODE_TIMER_MAX) return;
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
if (bta_dm_cb.pm_timer[i].in_use &&
bta_dm_cb.pm_timer[i].peer_bdaddr == peer_addr) {
if (bta_dm_cb.pm_timer[i].srvc_id[timer_idx] != BTA_ID_MAX) {
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], timer_idx);
/*
* TODO: Intentionally setting pm_action[timer_idx].
* This assignment should be eliminated in the future - see the
* pm_action[] related comment inside function
* bta_dm_pm_stop_timer().
*/
bta_dm_cb.pm_timer[i].pm_action[timer_idx] = power_mode;
}
break;
}
}
}
/*******************************************************************************
*
* Function bta_dm_pm_stop_timer_by_srvc_id
*
* Description stop all timer started by the service ID.
*
*
* Returns index of the power mode delay timer
*
******************************************************************************/
static void bta_dm_pm_stop_timer_by_srvc_id(const RawAddress& peer_addr,
uint8_t srvc_id) {
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
if (bta_dm_cb.pm_timer[i].in_use &&
bta_dm_cb.pm_timer[i].peer_bdaddr == peer_addr) {
for (int j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
if (bta_dm_cb.pm_timer[i].srvc_id[j] == srvc_id) {
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], j);
bta_dm_cb.pm_timer[i].pm_action[j] = BTA_DM_PM_NO_ACTION;
break;
}
}
}
}
}
/*******************************************************************************
*
* Function bta_dm_pm_start_timer
*
* Description start a PM timer
*
*
* Returns void
*
******************************************************************************/
static void bta_dm_pm_start_timer(tBTA_PM_TIMER* p_timer, uint8_t timer_idx,
uint64_t timeout_ms, uint8_t srvc_id,
uint8_t pm_action) {
std::unique_lock<std::recursive_mutex> schedule_lock(pm_timer_schedule_mutex);
std::unique_lock<std::recursive_mutex> state_lock(pm_timer_state_mutex);
p_timer->in_use = true;
if (p_timer->srvc_id[timer_idx] == BTA_ID_MAX) p_timer->active++;
if (p_timer->pm_action[timer_idx] < pm_action)
p_timer->pm_action[timer_idx] = pm_action;
p_timer->srvc_id[timer_idx] = srvc_id;
state_lock.unlock();
alarm_set_on_mloop(p_timer->timer[timer_idx], timeout_ms,
bta_dm_pm_timer_cback, p_timer->timer[timer_idx]);
}
/*******************************************************************************
*
* Function bta_dm_pm_stop_timer_by_index
*
* Description stop a PM timer
*
*
* Returns void
*
******************************************************************************/
static void bta_dm_pm_stop_timer_by_index(tBTA_PM_TIMER* p_timer,
uint8_t timer_idx) {
if ((p_timer == NULL) || (timer_idx >= BTA_DM_PM_MODE_TIMER_MAX)) return;
std::unique_lock<std::recursive_mutex> schedule_lock(pm_timer_schedule_mutex);
std::unique_lock<std::recursive_mutex> state_lock(pm_timer_state_mutex);
if (p_timer->srvc_id[timer_idx] == BTA_ID_MAX) {
return;
} /* The timer was not scheduled */
CHECK(p_timer->in_use);
CHECK(p_timer->active > 0);
p_timer->srvc_id[timer_idx] = BTA_ID_MAX;
/* NOTE: pm_action[timer_idx] intentionally not reset */
p_timer->active--;
if (p_timer->active == 0) p_timer->in_use = false;
state_lock.unlock();
alarm_cancel(p_timer->timer[timer_idx]);
}
/*******************************************************************************
*
* Function bta_dm_pm_cback
*
* Description Conn change callback from sys for low power management
*
*
* Returns void
*
******************************************************************************/
static void bta_dm_pm_cback(tBTA_SYS_CONN_STATUS status, uint8_t id,
uint8_t app_id, const RawAddress& peer_addr) {
uint8_t i, j;
tBTA_DM_PEER_DEVICE* p_dev;
tBTA_DM_PM_REQ pm_req = BTA_DM_PM_NEW_REQ;
LOG_DEBUG("Power management callback status:%s[%hhu] id:%s[%d], app:%hhu",
bta_sys_conn_status_text(status).c_str(), status,
BtaIdSysText(id).c_str(), id, app_id);
/* find if there is an power mode entry for the service */
for (i = 1; i <= p_bta_dm_pm_cfg[0].app_id; i++) {
if ((p_bta_dm_pm_cfg[i].id == id) &&
((p_bta_dm_pm_cfg[i].app_id == BTA_ALL_APP_ID) ||
(p_bta_dm_pm_cfg[i].app_id == app_id)))
break;
}
/* if no entries are there for the app_id and subsystem in p_bta_dm_pm_spec*/
if (i > p_bta_dm_pm_cfg[0].app_id) {
LOG_DEBUG("Ignoring power management callback as no service entries exist");
return;
}
LOG_DEBUG("Stopped all timers for service to device:%s id:%hhu",
PRIVATE_ADDRESS(peer_addr), id);
bta_dm_pm_stop_timer_by_srvc_id(peer_addr, id);
p_dev = bta_dm_find_peer_device(peer_addr);
if (p_dev) {
LOG_DEBUG("Device info:%s", device_info_text(p_dev->Info()).c_str());
} else {
LOG_ERROR("Unable to find peer device...yet soldiering on...");
}
/* set SSR parameters on SYS CONN OPEN */
int index = BTA_DM_PM_SSR0;
if ((BTA_SYS_CONN_OPEN == status) && p_dev &&
(p_dev->Info() & BTA_DM_DI_USE_SSR)) {
index = p_bta_dm_pm_spec[p_bta_dm_pm_cfg[i].spec_idx].ssr;
} else if (BTA_ID_AV == id) {
if (BTA_SYS_CONN_BUSY == status) {
/* set SSR4 for A2DP on SYS CONN BUSY */
index = BTA_DM_PM_SSR4;
} else if (BTA_SYS_CONN_IDLE == status) {
index = p_bta_dm_pm_spec[p_bta_dm_pm_cfg[i].spec_idx].ssr;
}
}
/* if no action for the event */
if (p_bta_dm_pm_spec[p_bta_dm_pm_cfg[i].spec_idx]
.actn_tbl[status][0]
.power_mode == BTA_DM_PM_NO_ACTION) {
if (BTA_DM_PM_SSR0 == index) /* and do not need to set SSR, return. */
return;
}
for (j = 0; j < bta_dm_conn_srvcs.count; j++) {
/* check if an entry already present */
if ((bta_dm_conn_srvcs.conn_srvc[j].id == id) &&
(bta_dm_conn_srvcs.conn_srvc[j].app_id == app_id) &&
bta_dm_conn_srvcs.conn_srvc[j].peer_bdaddr == peer_addr) {
bta_dm_conn_srvcs.conn_srvc[j].new_request = true;
break;
}
}
/* if subsystem has no more preference on the power mode remove
the cb */
if (p_bta_dm_pm_spec[p_bta_dm_pm_cfg[i].spec_idx]
.actn_tbl[status][0]
.power_mode == BTA_DM_PM_NO_PREF) {
if (j != bta_dm_conn_srvcs.count) {
bta_dm_conn_srvcs.count--;
for (; j < bta_dm_conn_srvcs.count; j++) {
memcpy(&bta_dm_conn_srvcs.conn_srvc[j],
&bta_dm_conn_srvcs.conn_srvc[j + 1],
sizeof(bta_dm_conn_srvcs.conn_srvc[j]));
}
} else {
APPL_TRACE_WARNING("bta_dm_act no entry for connected service cbs");
return;
}
} else if (j == bta_dm_conn_srvcs.count) {
/* check if we have more connected service that cbs */
if (bta_dm_conn_srvcs.count == BTA_DM_NUM_CONN_SRVS) {
LOG_WARN("bta_dm_act no more connected service cbs");
return;
}
/* fill in a new cb */
bta_dm_conn_srvcs.conn_srvc[j].id = id;
bta_dm_conn_srvcs.conn_srvc[j].app_id = app_id;
bta_dm_conn_srvcs.conn_srvc[j].new_request = true;
bta_dm_conn_srvcs.conn_srvc[j].peer_bdaddr = peer_addr;
LOG_INFO("New connection service:%s[%hhu] app_id:%d",
BtaIdSysText(id).c_str(), id, app_id);
bta_dm_conn_srvcs.count++;
bta_dm_conn_srvcs.conn_srvc[j].state = status;
} else {
/* no service is added or removed. only updating status. */
bta_dm_conn_srvcs.conn_srvc[j].state = status;
}
/* stop timer */
bta_dm_pm_stop_timer(peer_addr);
if (bta_dm_conn_srvcs.count > 0) {
pm_req = BTA_DM_PM_RESTART;
APPL_TRACE_DEBUG(
"%s bta_dm_pm_stop_timer for current service, restart other "
"service timers: count = %d",
__func__, bta_dm_conn_srvcs.count);
}
if (p_dev) {
p_dev->pm_mode_attempted = 0;
p_dev->pm_mode_failed = 0;
}
if (p_bta_dm_ssr_spec[index].max_lat || index == BTA_DM_PM_SSR_HH) {
bta_dm_pm_ssr(peer_addr, index);
} else {
const controller_t* controller = controller_get_interface();
uint8_t* p = NULL;
if (controller->supports_sniff_subrating() &&
((NULL != (p = BTM_ReadRemoteFeatures(peer_addr))) &&
HCI_SNIFF_SUB_RATE_SUPPORTED(p)) &&
(index == BTA_DM_PM_SSR0)) {
if (status == BTA_SYS_SCO_OPEN) {
APPL_TRACE_DEBUG("%s: SCO inactive, reset SSR to zero", __func__);
BTM_SetSsrParams(peer_addr, 0, 0, 0);
} else if (status == BTA_SYS_SCO_CLOSE) {
APPL_TRACE_DEBUG("%s: SCO active, back to old SSR", __func__);
bta_dm_pm_ssr(peer_addr, BTA_DM_PM_SSR0);
}
}
}
bta_dm_pm_set_mode(peer_addr, BTA_DM_PM_NO_ACTION, pm_req);
/* perform the HID link workaround if needed
** 1. If SCO up/down event is received OR
** 2. If HID connection open is received and SCO is already active.
** This will handle the case where HID connects when SCO already active
*/
if (BTM_IsDeviceUp() &&
(((status == BTA_SYS_SCO_OPEN) || (status == BTA_SYS_SCO_CLOSE)) ||
((status == BTA_SYS_CONN_OPEN) && (id == BTA_ID_HH) &&
bta_dm_pm_is_sco_active()))) {
bool bScoActive;
if (status == BTA_SYS_CONN_OPEN)
bScoActive = true;
else
bScoActive = (status == BTA_SYS_SCO_OPEN);
bta_dm_pm_hid_check(bScoActive);
}
}
/*******************************************************************************
*
* Function bta_dm_pm_set_mode
*
* Description Set the power mode for the device
*
*
* Returns void
*
******************************************************************************/
static void bta_dm_pm_set_mode(const RawAddress& peer_addr,
tBTA_DM_PM_ACTION pm_request,
tBTA_DM_PM_REQ pm_req) {
tBTA_DM_PM_ACTION pm_action = BTA_DM_PM_NO_ACTION;
uint64_t timeout_ms = 0;
uint8_t i, j;
tBTA_DM_PM_ACTION failed_pm = 0;
tBTA_DM_PEER_DEVICE* p_peer_device = NULL;
tBTA_DM_PM_ACTION allowed_modes = 0;
tBTA_DM_PM_ACTION pref_modes = 0;
const tBTA_DM_PM_CFG* p_pm_cfg;
const tBTA_DM_PM_SPEC* p_pm_spec;
const tBTA_DM_PM_ACTN* p_act0;
const tBTA_DM_PM_ACTN* p_act1;
tBTA_DM_SRVCS* p_srvcs = NULL;
bool timer_started = false;
uint8_t timer_idx, available_timer = BTA_DM_PM_MODE_TIMER_MAX;
uint64_t remaining_ms = 0;
if (!bta_dm_cb.device_list.count) {
LOG_INFO("Device list count is zero");
return;
}
/* see if any attempt to put device in low power mode failed */
p_peer_device = bta_dm_find_peer_device(peer_addr);
/* if no peer device found return */
if (p_peer_device == NULL) {
LOG_INFO("No peer device found");
return;
}
failed_pm = p_peer_device->pm_mode_failed;
for (i = 0; i < bta_dm_conn_srvcs.count; i++) {
p_srvcs = &bta_dm_conn_srvcs.conn_srvc[i];
if (p_srvcs->peer_bdaddr == peer_addr) {
/* p_bta_dm_pm_cfg[0].app_id is the number of entries */
for (j = 1; j <= p_bta_dm_pm_cfg[0].app_id; j++) {
if ((p_bta_dm_pm_cfg[j].id == p_srvcs->id) &&
((p_bta_dm_pm_cfg[j].app_id == BTA_ALL_APP_ID) ||
(p_bta_dm_pm_cfg[j].app_id == p_srvcs->app_id)))
break;
}
p_pm_cfg = &p_bta_dm_pm_cfg[j];
p_pm_spec = &p_bta_dm_pm_spec[p_pm_cfg->spec_idx];
p_act0 = &p_pm_spec->actn_tbl[p_srvcs->state][0];
p_act1 = &p_pm_spec->actn_tbl[p_srvcs->state][1];
allowed_modes |= p_pm_spec->allow_mask;
LOG_DEBUG(
"Service:%s[%hhu] state:%s[%hhu] allowed_modes:0x%02x "
"service_index:%hhu ",
BtaIdSysText(p_srvcs->id).c_str(), p_srvcs->id,
bta_sys_conn_status_text(p_srvcs->state).c_str(), p_srvcs->state,
allowed_modes, j);
/* PM actions are in the order of strictness */
/* first check if the first preference is ok */
if (!(failed_pm & p_act0->power_mode)) {
pref_modes |= p_act0->power_mode;
if (p_act0->power_mode >= pm_action) {
pm_action = p_act0->power_mode;
if (pm_req != BTA_DM_PM_NEW_REQ || p_srvcs->new_request) {
p_srvcs->new_request = false;
timeout_ms = p_act0->timeout;
}
}
}
/* if first preference has already failed, try second preference */
else if (!(failed_pm & p_act1->power_mode)) {
pref_modes |= p_act1->power_mode;
if (p_act1->power_mode > pm_action) {
pm_action = p_act1->power_mode;
timeout_ms = p_act1->timeout;
}
}
}
}
if (pm_action & (BTA_DM_PM_PARK | BTA_DM_PM_SNIFF)) {
/* some service don't like the mode */
if (!(allowed_modes & pm_action)) {
/* select the other mode if its allowed and preferred, otherwise 0 which
* is BTA_DM_PM_NO_ACTION */
pm_action =
(allowed_modes & (BTA_DM_PM_PARK | BTA_DM_PM_SNIFF) & pref_modes);
/* no timeout needed if no action is required */
if (pm_action == BTA_DM_PM_NO_ACTION) {
timeout_ms = 0;
}
}
}
/* if need to start a timer */
if ((pm_req != BTA_DM_PM_EXECUTE) && (timeout_ms > 0)) {
for (i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
if (bta_dm_cb.pm_timer[i].in_use &&
bta_dm_cb.pm_timer[i].peer_bdaddr == peer_addr) {
timer_idx = bta_pm_action_to_timer_idx(pm_action);
if (timer_idx != BTA_DM_PM_MODE_TIMER_MAX) {
remaining_ms =
alarm_get_remaining_ms(bta_dm_cb.pm_timer[i].timer[timer_idx]);
if (remaining_ms < timeout_ms) {
/* Cancel and restart the timer */
/*
* TODO: The value of pm_action[timer_idx] is
* conditionally updated between the two function
* calls below when the timer is restarted.
* This logic is error-prone and should be eliminated
* in the future.
*/
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], timer_idx);
bta_dm_pm_start_timer(&bta_dm_cb.pm_timer[i], timer_idx, timeout_ms,
p_srvcs->id, pm_action);
}
timer_started = true;
}
break;
} else if (!bta_dm_cb.pm_timer[i].in_use) {
if (available_timer == BTA_DM_PM_MODE_TIMER_MAX) available_timer = i;
}
}
/* new power mode for a new active connection */
if (!timer_started) {
if (available_timer != BTA_DM_PM_MODE_TIMER_MAX) {
bta_dm_cb.pm_timer[available_timer].peer_bdaddr = peer_addr;
timer_idx = bta_pm_action_to_timer_idx(pm_action);
if (timer_idx != BTA_DM_PM_MODE_TIMER_MAX) {
bta_dm_pm_start_timer(&bta_dm_cb.pm_timer[available_timer], timer_idx,
timeout_ms, p_srvcs->id, pm_action);
timer_started = true;
}
} else {
LOG_WARN("no more timers");
}
}
return;
}
/* if pending power mode timer expires, and currecnt link is in a
lower power mode than current profile requirement, igonre it */
if (pm_req == BTA_DM_PM_EXECUTE && pm_request < pm_action) {
LOG_ERROR("Ignore the power mode request: %d", pm_request);
return;
}
if (pm_action == BTA_DM_PM_PARK) {
p_peer_device->pm_mode_attempted = BTA_DM_PM_PARK;
bta_dm_pm_park(peer_addr);
LOG_WARN("DEPRECATED Setting link to park mode peer:%s",
PRIVATE_ADDRESS(peer_addr));
} else if (pm_action & BTA_DM_PM_SNIFF) {
/* dont initiate SNIFF, if link_policy has it disabled */
if (BTM_is_sniff_allowed_for(peer_addr)) {
LOG_DEBUG(
"Link policy allows sniff mode so setting mode "
"peer:%s",
PRIVATE_ADDRESS(peer_addr));
p_peer_device->pm_mode_attempted = BTA_DM_PM_SNIFF;
bta_dm_pm_sniff(p_peer_device, (uint8_t)(pm_action & 0x0F));
} else {
LOG_DEBUG("Link policy disallows sniff mode, ignore request peer:%s",
PRIVATE_ADDRESS(peer_addr));
}
} else if (pm_action == BTA_DM_PM_ACTIVE) {
LOG_DEBUG("Setting link to active mode peer:%s",
PRIVATE_ADDRESS(peer_addr));
bta_dm_pm_active(peer_addr);
}
}
/*******************************************************************************
*
* Function bta_ag_pm_park
*
* Description Switch to park mode.
*
*
* Returns true if park attempted, false otherwise.
*
******************************************************************************/
static bool bta_dm_pm_park(const RawAddress& peer_addr) {
tBTM_PM_MODE mode = BTM_PM_STS_ACTIVE;
/* if not in park mode, switch to park */
if (!BTM_ReadPowerMode(peer_addr, &mode)) {
LOG_WARN("Unable to read power mode for peer:%s",
PRIVATE_ADDRESS(peer_addr));
}
if (mode != BTM_PM_MD_PARK) {
tBTM_STATUS status = BTM_SetPowerMode(bta_dm_cb.pm_id, peer_addr,
&p_bta_dm_pm_md[BTA_DM_PM_PARK_IDX]);
if (status == BTM_CMD_STORED || status == BTM_CMD_STARTED) {
return true;
}
LOG_WARN("Unable to set park power mode");
}
return true;
}
/*******************************************************************************
*
* Function bta_ag_pm_sniff
*
* Description Switch to sniff mode.
*
*
* Returns true if sniff attempted, false otherwise.
*
******************************************************************************/
void bta_dm_pm_sniff(tBTA_DM_PEER_DEVICE* p_peer_dev, uint8_t index) {
tBTM_PM_MODE mode = BTM_PM_MD_ACTIVE;
tBTM_PM_PWR_MD pwr_md;
tBTM_STATUS status;
if (!BTM_ReadPowerMode(p_peer_dev->peer_bdaddr, &mode)) {
LOG_WARN("Unable to read power mode for peer:%s",
PRIVATE_ADDRESS(p_peer_dev->peer_bdaddr));
}
tBTM_PM_STATUS mode_status = static_cast<tBTM_PM_STATUS>(mode);
LOG_DEBUG("Current power mode:%s[0x%x] peer_info:%s[0x%02x]",
power_mode_status_text(mode_status).c_str(), mode_status,
device_info_text(p_peer_dev->Info()).c_str(), p_peer_dev->Info());
uint8_t* p_rem_feat = BTM_ReadRemoteFeatures(p_peer_dev->peer_bdaddr);
const controller_t* controller = controller_get_interface();
if (mode != BTM_PM_MD_SNIFF ||
(controller->supports_sniff_subrating() && p_rem_feat &&
HCI_SNIFF_SUB_RATE_SUPPORTED(p_rem_feat) &&
!(p_peer_dev->Info() & BTA_DM_DI_USE_SSR))) {
/* Dont initiate Sniff if controller has alreay accepted
* remote sniff params. This avoid sniff loop issue with
* some agrresive headsets who use sniff latencies more than
* DUT supported range of Sniff intervals.*/
if ((mode == BTM_PM_MD_SNIFF) &&
(p_peer_dev->Info() & BTA_DM_DI_ACP_SNIFF)) {
LOG_DEBUG("Link already in sniff mode peer:%s",
PRIVATE_ADDRESS(p_peer_dev->peer_bdaddr));
return;
}
}
/* if the current mode is not sniff, issue the sniff command.
* If sniff, but SSR is not used in this link, still issue the command */
memcpy(&pwr_md, &p_bta_dm_pm_md[index], sizeof(tBTM_PM_PWR_MD));
if (p_peer_dev->Info() & BTA_DM_DI_INT_SNIFF) {
LOG_DEBUG("Trying to force power mode");
pwr_md.mode |= BTM_PM_MD_FORCE;
}
status = BTM_SetPowerMode(bta_dm_cb.pm_id, p_peer_dev->peer_bdaddr, &pwr_md);
if (status == BTM_CMD_STORED || status == BTM_CMD_STARTED) {
p_peer_dev->info &= ~(BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF);
p_peer_dev->info |= BTA_DM_DI_SET_SNIFF;
} else if (status == BTM_SUCCESS) {
APPL_TRACE_DEBUG("bta_dm_pm_sniff BTM_SetPowerMode() returns BTM_SUCCESS");
p_peer_dev->info &=
~(BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF | BTA_DM_DI_SET_SNIFF);
} else {
LOG_ERROR("Unable to set power mode peer:%s status:%s",
PRIVATE_ADDRESS(p_peer_dev->peer_bdaddr),
btm_status_text(status).c_str());
p_peer_dev->info &=
~(BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF | BTA_DM_DI_SET_SNIFF);
}
}
/*******************************************************************************
*
* Function bta_dm_pm_ssr
*
* Description checks and sends SSR parameters
*
* Returns void
*
******************************************************************************/
static void bta_dm_pm_ssr(const RawAddress& peer_addr, int ssr) {
int current_ssr_index;
int ssr_index = ssr;
tBTA_DM_SSR_SPEC* p_spec = &p_bta_dm_ssr_spec[ssr_index];
LOG_DEBUG("Request to put link to device:%s into power_mode:%s",
PRIVATE_ADDRESS(peer_addr), p_spec->name);
/* go through the connected services */
for (int i = 0; i < bta_dm_conn_srvcs.count; i++) {
const tBTA_DM_SRVCS& service = bta_dm_conn_srvcs.conn_srvc[i];
if (service.peer_bdaddr != peer_addr) {
continue;
}
/* p_bta_dm_pm_cfg[0].app_id is the number of entries */
for (int j = 1; j <= p_bta_dm_pm_cfg[0].app_id; j++) {
/* find the associated p_bta_dm_pm_cfg */
const tBTA_DM_PM_CFG& config = p_bta_dm_pm_cfg[j];
current_ssr_index = p_bta_dm_pm_spec[config.spec_idx].ssr;
if ((config.id == service.id) && ((config.app_id == BTA_ALL_APP_ID) ||
(config.app_id == service.app_id))) {
LOG_INFO("Found connected service:%s app_id:%d peer:%s spec_name:%s",
BtaIdSysText(service.id).c_str(), service.app_id,
PRIVATE_ADDRESS(peer_addr),
p_bta_dm_ssr_spec[current_ssr_index].name);
break;
}
}
/* find the ssr index with the smallest max latency. */
tBTA_DM_SSR_SPEC* p_spec_cur = &p_bta_dm_ssr_spec[current_ssr_index];
#if (BTA_HH_INCLUDED == TRUE)
/* HH has the per connection SSR preference, already read the SSR params
* from BTA HH */
if (current_ssr_index == BTA_DM_PM_SSR_HH) {
if (bta_hh_read_ssr_param(peer_addr, &p_spec_cur->max_lat,
&p_spec_cur->min_rmt_to) == BTA_HH_ERR) {
continue;
}
}
#endif
if (p_spec_cur->max_lat < p_spec->max_lat ||
(ssr_index == BTA_DM_PM_SSR0 && current_ssr_index != BTA_DM_PM_SSR0)) {
LOG_DEBUG(
"Changing sniff subrating specification for %s from %s[%d] ==> "
"%s[%d]",
PRIVATE_ADDRESS(peer_addr), p_spec->name, ssr_index, p_spec_cur->name,
current_ssr_index);
ssr_index = current_ssr_index;
p_spec = &p_bta_dm_ssr_spec[ssr_index];
}
}
if (p_spec->max_lat) {
/* Avoid SSR reset on device which has SCO connected */
if (bta_dm_pm_is_sco_active()) {
int idx = bta_dm_get_sco_index();
if (idx != -1) {
if (bta_dm_conn_srvcs.conn_srvc[idx].peer_bdaddr == peer_addr) {
LOG_WARN("SCO is active on device, ignore SSR");
return;
}
}
}
LOG_DEBUG(
"Setting sniff subrating for device:%s spec_name:%s max_latency(s):%.2f"
" min_local_timeout(s):%.2f min_remote_timeout(s):%.2f",
PRIVATE_ADDRESS(peer_addr), p_spec->name,
ticks_to_seconds(p_spec->max_lat), ticks_to_seconds(p_spec->min_loc_to),
ticks_to_seconds(p_spec->min_rmt_to));
/* set the SSR parameters. */
BTM_SetSsrParams(peer_addr, p_spec->max_lat, p_spec->min_rmt_to,
p_spec->min_loc_to);
}
}
/*******************************************************************************
*
* Function bta_dm_pm_active
*
* Description Brings connection to active mode
*
* Returns void
*
******************************************************************************/
void bta_dm_pm_active(const RawAddress& peer_addr) {
tBTM_PM_PWR_MD pm{
.mode = BTM_PM_MD_ACTIVE,
};
/* switch to active mode */
tBTM_STATUS status = BTM_SetPowerMode(bta_dm_cb.pm_id, peer_addr, &pm);
switch (status) {
case BTM_CMD_STORED:
LOG_DEBUG("Active power mode stored for execution later for remote:%s",
PRIVATE_ADDRESS(peer_addr));
break;
case BTM_CMD_STARTED:
LOG_DEBUG("Active power mode started for remote:%s",
PRIVATE_ADDRESS(peer_addr));
break;
case BTM_SUCCESS:
LOG_INFO("Active power mode already set for device:%s",
PRIVATE_ADDRESS(peer_addr));
break;
default:
LOG_WARN("Unable to set active power mode for device:%s status:%s",
PRIVATE_ADDRESS(peer_addr), btm_status_text(status).c_str());
break;
}
}
/** BTM power manager callback */
static void bta_dm_pm_btm_cback(const RawAddress& bd_addr,
tBTM_PM_STATUS status, uint16_t value,
tHCI_STATUS hci_status) {
do_in_main_thread(FROM_HERE, base::Bind(bta_dm_pm_btm_status, bd_addr, status,
value, hci_status));
}
/*******************************************************************************
*
* Function bta_dm_pm_timer_cback
*
* Description Power management timer callback.
*
*
* Returns void
*
******************************************************************************/
static void bta_dm_pm_timer_cback(void* data) {
uint8_t i, j;
alarm_t* alarm = (alarm_t*)data;
std::unique_lock<std::recursive_mutex> state_lock(pm_timer_state_mutex);
for (i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
APPL_TRACE_DEBUG("dm_pm_timer[%d] in use? %d", i,
bta_dm_cb.pm_timer[i].in_use);
if (bta_dm_cb.pm_timer[i].in_use) {
for (j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
if (bta_dm_cb.pm_timer[i].timer[j] == alarm) {
bta_dm_cb.pm_timer[i].active--;
bta_dm_cb.pm_timer[i].srvc_id[j] = BTA_ID_MAX;
APPL_TRACE_DEBUG("dm_pm_timer[%d] expires, timer_idx=%d", i, j);
break;
}
}
if (bta_dm_cb.pm_timer[i].active == 0)
bta_dm_cb.pm_timer[i].in_use = false;
if (j < BTA_DM_PM_MODE_TIMER_MAX) break;
}
}
state_lock.unlock();
/* no more timers */
if (i == BTA_DM_NUM_PM_TIMER) return;
do_in_main_thread(
FROM_HERE, base::Bind(bta_dm_pm_timer, bta_dm_cb.pm_timer[i].peer_bdaddr,
bta_dm_cb.pm_timer[i].pm_action[j]));
}
/** Process pm status event from btm */
void bta_dm_pm_btm_status(const RawAddress& bd_addr, tBTM_PM_STATUS status,
uint16_t interval, tHCI_STATUS hci_status) {
LOG_DEBUG(
"Power mode notification event status:%s peer:%s interval:%hu "
"hci_status:%s",
power_mode_status_text(status).c_str(), PRIVATE_ADDRESS(bd_addr),
interval, hci_error_code_text(hci_status).c_str());
tBTA_DM_PEER_DEVICE* p_dev = bta_dm_find_peer_device(bd_addr);
if (p_dev == nullptr) {
LOG_INFO("Unable to process power event for peer:%s",
PRIVATE_ADDRESS(bd_addr));
return;
}
tBTA_DM_DEV_INFO info = p_dev->Info();
/* check new mode */
switch (status) {
case BTM_PM_STS_ACTIVE:
/* if our sniff or park attempt failed
we should not try it again*/
if (hci_status != 0) {
APPL_TRACE_ERROR("%s hci_status=%d", __func__, hci_status);
p_dev->info &=
~(BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF | BTA_DM_DI_SET_SNIFF);
if (p_dev->pm_mode_attempted & (BTA_DM_PM_PARK | BTA_DM_PM_SNIFF)) {
p_dev->pm_mode_failed |=
((BTA_DM_PM_PARK | BTA_DM_PM_SNIFF) & p_dev->pm_mode_attempted);
bta_dm_pm_stop_timer_by_mode(bd_addr, p_dev->pm_mode_attempted);
bta_dm_pm_set_mode(bd_addr, BTA_DM_PM_NO_ACTION, BTA_DM_PM_RESTART);
}
} else {
if (p_dev->prev_low) {
/* need to send the SSR paramaters to controller again */
bta_dm_pm_ssr(p_dev->peer_bdaddr, BTA_DM_PM_SSR0);
}
p_dev->prev_low = BTM_PM_STS_ACTIVE;
/* link to active mode, need to restart the timer for next low power
* mode if needed */
bta_dm_pm_stop_timer(bd_addr);
bta_dm_pm_set_mode(bd_addr, BTA_DM_PM_NO_ACTION, BTA_DM_PM_RESTART);
}
break;
case BTM_PM_STS_PARK:
case BTM_PM_STS_HOLD:
/* save the previous low power mode - for SSR.
* SSR parameters are sent to controller on "conn open".
* the numbers stay good until park/hold/detach */
if (p_dev->info & BTA_DM_DI_USE_SSR) p_dev->prev_low = status;
break;
case BTM_PM_STS_SSR:
if (hci_status != 0) {
LOG_WARN("Received error when attempting to set sniff subrating mode");
}
if (interval) {
p_dev->info |= BTA_DM_DI_USE_SSR;
LOG_DEBUG("Enabling sniff subrating mode for peer:%s",
PRIVATE_ADDRESS(bd_addr));
} else {
p_dev->info &= ~BTA_DM_DI_USE_SSR;
LOG_DEBUG("Disabling sniff subrating mode for peer:%s",
PRIVATE_ADDRESS(bd_addr));
}
break;
case BTM_PM_STS_SNIFF:
if (hci_status == 0) {
/* Stop PM timer now if already active for
* particular device since link is already
* put in sniff mode by remote device, and
* PM timer sole purpose is to put the link
* in sniff mode from host side.
*/
bta_dm_pm_stop_timer(bd_addr);
} else {
p_dev->info &=
~(BTA_DM_DI_SET_SNIFF | BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF);
if (info & BTA_DM_DI_SET_SNIFF)
p_dev->info |= BTA_DM_DI_INT_SNIFF;
else
p_dev->info |= BTA_DM_DI_ACP_SNIFF;
}
break;
case BTM_PM_STS_ERROR:
p_dev->info &= ~BTA_DM_DI_SET_SNIFF;
break;
default:
LOG_ERROR("Received unknown power mode status event:%hhu", status);
break;
}
}
/** Process pm timer event from btm */
void bta_dm_pm_timer(const RawAddress& bd_addr, tBTA_DM_PM_ACTION pm_request) {
APPL_TRACE_EVENT("%s", __func__);
bta_dm_pm_set_mode(bd_addr, pm_request, BTA_DM_PM_EXECUTE);
}
/*******************************************************************************
*
* Function bta_dm_find_peer_device
*
* Description Given an address, find the associated control block.
*
* Returns tBTA_DM_PEER_DEVICE
*
******************************************************************************/
tBTA_DM_PEER_DEVICE* bta_dm_find_peer_device(const RawAddress& peer_addr) {
tBTA_DM_PEER_DEVICE* p_dev = NULL;
for (int i = 0; i < bta_dm_cb.device_list.count; i++) {
if (bta_dm_cb.device_list.peer_device[i].peer_bdaddr == peer_addr) {
p_dev = &bta_dm_cb.device_list.peer_device[i];
break;
}
}
return p_dev;
}
/*******************************************************************************
*
* Function bta_dm_is_sco_active
*
* Description Loop through connected services for HFP+State=SCO
*
* Returns bool. true if SCO active, else false
*
******************************************************************************/
static bool bta_dm_pm_is_sco_active() {
int j;
bool bScoActive = false;
for (j = 0; j < bta_dm_conn_srvcs.count; j++) {
/* check if an entry already present */
if ((bta_dm_conn_srvcs.conn_srvc[j].id == BTA_ID_AG) &&
(bta_dm_conn_srvcs.conn_srvc[j].state == BTA_SYS_SCO_OPEN)) {
bScoActive = true;
break;
}
}
return bScoActive;
}
/*******************************************************************************
*
* Function bta_dm_get_sco_index
*
* Description Loop through connected services for HFP+State=SCO
*
* Returns index at which SCO is connected, in absence of SCO return -1
*
******************************************************************************/
static int bta_dm_get_sco_index() {
for (int j = 0; j < bta_dm_conn_srvcs.count; j++) {
/* check for SCO connected index */
if ((bta_dm_conn_srvcs.conn_srvc[j].id == BTA_ID_AG) &&
(bta_dm_conn_srvcs.conn_srvc[j].state == BTA_SYS_SCO_OPEN)) {
return j;
}
}
return -1;
}
/*******************************************************************************
*
* Function bta_dm_pm_hid_check
*
* Description Disables/Enables sniff in link policy based on SCO Up/Down
*
* Returns None
*
******************************************************************************/
static void bta_dm_pm_hid_check(bool bScoActive) {
int j;
/* if HID is active, disable the link policy */
for (j = 0; j < bta_dm_conn_srvcs.count; j++) {
/* check if an entry already present */
if (bta_dm_conn_srvcs.conn_srvc[j].id == BTA_ID_HH) {
APPL_TRACE_DEBUG(
"SCO status change(Active: %d), modify HID link policy. state: %d",
bScoActive, bta_dm_conn_srvcs.conn_srvc[j].state);
auto peer_addr = bta_dm_conn_srvcs.conn_srvc[j].peer_bdaddr;
if (bScoActive) {
BTM_block_sniff_mode_for(peer_addr);
bta_dm_pm_active(peer_addr);
} else {
BTM_unblock_sniff_mode_for(peer_addr);
bta_dm_pm_set_mode(peer_addr, BTA_DM_PM_NO_ACTION, BTA_DM_PM_RESTART);
}
}
}
}
/*******************************************************************************
*
* Function bta_dm_pm_obtain_controller_state
*
* Description This function obtains the consolidated controller power
* state
*
* Parameters:
*
******************************************************************************/
tBTA_DM_CONTRL_STATE bta_dm_pm_obtain_controller_state(void) {
/* Did not use counts as it is not sure, how accurate the count values are
*in
** bta_dm_cb.device_list.count > 0 || bta_dm_cb.device_list.le_count > 0 */
tBTA_DM_CONTRL_STATE cur_state = BTA_DM_CONTRL_UNKNOWN;
cur_state = BTM_PM_ReadControllerState();
APPL_TRACE_DEBUG("bta_dm_pm_obtain_controller_state: %d", cur_state);
return cur_state;
}
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