| /****************************************************************************** |
| * |
| * Copyright 2000-2012 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 functions that manages ACL link modes. |
| * This includes operations such as active, hold, |
| * park and sniff modes. |
| * |
| * This module contains both internal and external (API) |
| * functions. External (API) functions are distinguishable |
| * by their names beginning with uppercase BTM. |
| * |
| *****************************************************************************/ |
| |
| #define LOG_TAG "bt_btm_pm" |
| |
| #include <base/strings/stringprintf.h> |
| #include <cstdint> |
| #include <unordered_map> |
| |
| #include "bt_target.h" |
| #include "device/include/controller.h" |
| #include "device/include/interop.h" |
| #include "main/shim/dumpsys.h" |
| #include "main/shim/link_policy.h" |
| #include "main/shim/shim.h" |
| #include "osi/include/log.h" |
| #include "osi/include/osi.h" // UNUSED_ATTR |
| #include "stack/btm/btm_int_types.h" |
| #include "stack/include/btm_api.h" |
| #include "stack/include/btm_api_types.h" |
| #include "stack/include/btm_status.h" |
| #include "types/raw_address.h" |
| |
| void l2c_OnHciModeChangeSendPendingPackets(RawAddress remote); |
| void btm_sco_chk_pend_unpark(tHCI_STATUS status, uint16_t handle); |
| void btm_cont_rswitch_from_handle(uint16_t hci_handle); |
| extern tBTM_CB btm_cb; |
| |
| namespace { |
| uint16_t pm_pend_link = 0; |
| |
| std::unordered_map<uint16_t /* handle */, tBTM_PM_MCB> pm_mode_db; |
| |
| tBTM_PM_MCB* btm_pm_get_power_manager_from_address(const RawAddress& bda) { |
| for (auto& entry : pm_mode_db) { |
| if (entry.second.bda_ == bda) { |
| return &entry.second; |
| } |
| } |
| return nullptr; |
| } |
| |
| tBTM_PM_RCB pm_reg_db; /* per application/module */ |
| |
| uint8_t pm_pend_id = 0; /* the id pf the module, which has a pending PM cmd */ |
| |
| constexpr char kBtmLogTag[] = "ACL"; |
| } |
| |
| /*****************************************************************************/ |
| /* to handle different modes */ |
| /*****************************************************************************/ |
| #define BTM_PM_NUM_SET_MODES 3 /* only hold, sniff & park */ |
| |
| #define BTM_PM_GET_MD1 1 |
| #define BTM_PM_GET_MD2 2 |
| #define BTM_PM_GET_COMP 3 |
| |
| const uint8_t |
| btm_pm_md_comp_matrix[BTM_PM_NUM_SET_MODES * BTM_PM_NUM_SET_MODES] = { |
| BTM_PM_GET_COMP, BTM_PM_GET_MD2, BTM_PM_GET_MD2, |
| |
| BTM_PM_GET_MD1, BTM_PM_GET_COMP, BTM_PM_GET_MD1, |
| |
| BTM_PM_GET_MD1, BTM_PM_GET_MD2, BTM_PM_GET_COMP}; |
| |
| static void send_sniff_subrating(uint16_t handle, const RawAddress& addr, |
| uint16_t max_lat, uint16_t min_rmt_to, |
| uint16_t min_loc_to) { |
| btsnd_hcic_sniff_sub_rate(handle, max_lat, min_rmt_to, min_loc_to); |
| BTM_LogHistory(kBtmLogTag, addr, "Sniff subrating", |
| base::StringPrintf( |
| "max_latency:%.2f peer_timeout:%.2f local_timeout:%.2f", |
| ticks_to_seconds(max_lat), ticks_to_seconds(min_rmt_to), |
| ticks_to_seconds(min_loc_to))); |
| } |
| |
| static tBTM_STATUS btm_pm_snd_md_req(uint16_t handle, uint8_t pm_id, |
| int link_ind, |
| const tBTM_PM_PWR_MD* p_mode); |
| |
| /*****************************************************************************/ |
| /* P U B L I C F U N C T I O N S */ |
| /*****************************************************************************/ |
| /******************************************************************************* |
| * |
| * Function BTM_PmRegister |
| * |
| * Description register or deregister with power manager |
| * |
| * Returns BTM_SUCCESS if successful, |
| * BTM_NO_RESOURCES if no room to hold registration |
| * BTM_ILLEGAL_VALUE |
| * |
| ******************************************************************************/ |
| tBTM_STATUS BTM_PmRegister(uint8_t mask, uint8_t* p_pm_id, |
| tBTM_PM_STATUS_CBACK* p_cb) { |
| if (bluetooth::shim::is_gd_link_policy_enabled()) { |
| ASSERT(p_pm_id != nullptr); |
| ASSERT(p_cb != nullptr); |
| if (mask & BTM_PM_DEREG) { |
| return (bluetooth::shim::UnregisterLinkPolicyClient(p_cb)) |
| ? (BTM_SUCCESS) |
| : (BTM_NO_RESOURCES); |
| } else { |
| *p_pm_id = 0; |
| return (bluetooth::shim::RegisterLinkPolicyClient(p_cb)) |
| ? (BTM_SUCCESS) |
| : (BTM_NO_RESOURCES); |
| } |
| } |
| |
| /* de-register */ |
| if (mask & BTM_PM_DEREG) { |
| if (*p_pm_id >= BTM_MAX_PM_RECORDS) return BTM_ILLEGAL_VALUE; |
| pm_reg_db.mask = BTM_PM_REC_NOT_USED; |
| return BTM_SUCCESS; |
| } |
| |
| if (pm_reg_db.mask == BTM_PM_REC_NOT_USED) { |
| /* if register for notification, should provide callback routine */ |
| if (p_cb == NULL) return BTM_ILLEGAL_VALUE; |
| pm_reg_db.cback = p_cb; |
| pm_reg_db.mask = mask; |
| *p_pm_id = 0; |
| return BTM_SUCCESS; |
| } |
| |
| return BTM_NO_RESOURCES; |
| } |
| |
| void BTM_PM_OnConnected(uint16_t handle, const RawAddress& remote_bda) { |
| pm_mode_db[handle] = {}; |
| pm_mode_db[handle].Init(remote_bda, handle); |
| } |
| |
| void BTM_PM_OnDisconnected(uint16_t handle) { |
| pm_mode_db.erase(handle); |
| if (handle == pm_pend_link) { |
| pm_pend_link = 0; |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function BTM_SetPowerMode |
| * |
| * Description store the mode in control block or |
| * alter ACL connection behavior. |
| * |
| * Returns BTM_SUCCESS if successful, |
| * BTM_UNKNOWN_ADDR if bd addr is not active or bad |
| * |
| ******************************************************************************/ |
| tBTM_STATUS BTM_SetPowerMode(uint8_t pm_id, const RawAddress& remote_bda, |
| const tBTM_PM_PWR_MD* p_mode) { |
| if (pm_id >= BTM_MAX_PM_RECORDS) { |
| pm_id = BTM_PM_SET_ONLY_ID; |
| } |
| |
| if (!p_mode) { |
| LOG_ERROR("pm_id: %u, p_mode is null for %s", unsigned(pm_id), |
| PRIVATE_ADDRESS(remote_bda)); |
| return BTM_ILLEGAL_VALUE; |
| } |
| |
| // per ACL link |
| auto* p_cb = btm_pm_get_power_manager_from_address(remote_bda); |
| if (p_cb == nullptr) { |
| LOG_WARN("Unable to find power manager for peer: %s", |
| PRIVATE_ADDRESS(remote_bda)); |
| return BTM_UNKNOWN_ADDR; |
| } |
| uint16_t handle = p_cb->handle_; |
| |
| tBTM_PM_MODE mode = p_mode->mode; |
| if (!is_legal_power_mode(mode)) { |
| LOG_ERROR("Unable to set illegal power mode value:0x%02x", mode); |
| return BTM_ILLEGAL_VALUE; |
| } |
| |
| if (p_mode->mode & BTM_PM_MD_FORCE) { |
| LOG_INFO("Attempting to force into this power mode"); |
| /* take out the force bit */ |
| mode &= (~BTM_PM_MD_FORCE); |
| } |
| |
| if (bluetooth::shim::is_gd_link_policy_enabled()) { |
| tBTM_PM_PWR_MD power_mode_request = *p_mode; |
| power_mode_request.mode &= (~BTM_PM_MD_FORCE); |
| return bluetooth::shim::BTM_SetPowerMode(handle, power_mode_request); |
| } |
| |
| if (mode != BTM_PM_MD_ACTIVE) { |
| const controller_t* controller = controller_get_interface(); |
| if ((mode == BTM_PM_MD_HOLD && !controller->supports_hold_mode()) || |
| (mode == BTM_PM_MD_SNIFF && !controller->supports_sniff_mode()) || |
| (mode == BTM_PM_MD_PARK && !controller->supports_park_mode()) || |
| interop_match_addr(INTEROP_DISABLE_SNIFF, &remote_bda)) { |
| LOG_ERROR("pm_id %u mode %u is not supported for %s", pm_id, mode, |
| PRIVATE_ADDRESS(remote_bda)); |
| return BTM_MODE_UNSUPPORTED; |
| } |
| } |
| |
| if (mode == p_cb->state) { |
| /* already in the requested mode and the current interval has less latency |
| * than the max */ |
| if ((mode == BTM_PM_MD_ACTIVE) || |
| ((p_mode->mode & BTM_PM_MD_FORCE) && (p_mode->max >= p_cb->interval) && |
| (p_mode->min <= p_cb->interval)) || |
| ((p_mode->mode & BTM_PM_MD_FORCE) == 0 && |
| (p_mode->max >= p_cb->interval))) { |
| LOG_INFO( |
| "Device is already in requested mode %d, interval: %d, max: %d, min: " |
| "%d", |
| p_mode->mode, p_cb->interval, p_mode->max, p_mode->min); |
| return BTM_SUCCESS; |
| } |
| } |
| |
| /* update mode database */ |
| if (((pm_id != BTM_PM_SET_ONLY_ID) && (pm_reg_db.mask & BTM_PM_REG_SET)) || |
| ((pm_id == BTM_PM_SET_ONLY_ID) && (pm_pend_link != 0))) { |
| /* Make sure mask is set to BTM_PM_REG_SET */ |
| pm_reg_db.mask |= BTM_PM_REG_SET; |
| *(&p_cb->req_mode) = *p_mode; |
| p_cb->chg_ind = true; |
| } |
| |
| /* if mode == hold or pending, return */ |
| if ((p_cb->state == BTM_PM_STS_HOLD) || (p_cb->state == BTM_PM_STS_PENDING) || |
| (pm_pend_link != 0)) { |
| LOG_INFO( |
| "Current power mode is hold or pending status or pending links" |
| " state:%s[%hhu] pm_pending_link:%hu", |
| power_mode_state_text(p_cb->state).c_str(), p_cb->state, pm_pend_link); |
| /* command pending */ |
| if (handle != pm_pend_link) { |
| p_cb->state |= BTM_PM_STORED_MASK; |
| LOG_INFO("Setting stored bitmask for peer:%s", |
| PRIVATE_ADDRESS(remote_bda)); |
| } |
| return BTM_CMD_STORED; |
| } |
| |
| LOG_INFO( |
| "Setting power mode for peer:%s current_mode:%s[%hhu] new_mode:%s[%hhu]", |
| PRIVATE_ADDRESS(remote_bda), power_mode_state_text(p_cb->state).c_str(), |
| p_cb->state, power_mode_text(p_mode->mode).c_str(), p_mode->mode); |
| |
| return btm_pm_snd_md_req(p_cb->handle_, pm_id, p_cb->handle_, p_mode); |
| } |
| |
| bool BTM_SetLinkPolicyActiveMode(const RawAddress& remote_bda) { |
| tBTM_PM_PWR_MD settings; |
| memset((void*)&settings, 0, sizeof(settings)); |
| settings.mode = BTM_PM_MD_ACTIVE; |
| |
| switch (BTM_SetPowerMode(BTM_PM_SET_ONLY_ID, remote_bda, &settings)) { |
| case BTM_CMD_STORED: |
| case BTM_SUCCESS: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| bool BTM_ReadPowerMode(const RawAddress& remote_bda, tBTM_PM_MODE* p_mode) { |
| if (p_mode == nullptr) { |
| LOG_ERROR("power mode is nullptr"); |
| return false; |
| } |
| tBTM_PM_MCB* p_mcb = btm_pm_get_power_manager_from_address(remote_bda); |
| if (p_mcb == nullptr) { |
| LOG_WARN("Unknown device:%s", PRIVATE_ADDRESS(remote_bda)); |
| return false; |
| } |
| *p_mode = static_cast<tBTM_PM_MODE>(p_mcb->state); |
| return true; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function BTM_SetSsrParams |
| * |
| * Description This sends the given SSR parameters for the given ACL |
| * connection if it is in ACTIVE mode. |
| * |
| * Input Param remote_bda - device address of desired ACL connection |
| * max_lat - maximum latency (in 0.625ms)(0-0xFFFE) |
| * min_rmt_to - minimum remote timeout |
| * min_loc_to - minimum local timeout |
| * |
| * |
| * Returns BTM_SUCCESS if the HCI command is issued successful, |
| * BTM_UNKNOWN_ADDR if bd addr is not active or bad |
| * BTM_CMD_STORED if the command is stored |
| * |
| ******************************************************************************/ |
| tBTM_STATUS BTM_SetSsrParams(const RawAddress& remote_bda, uint16_t max_lat, |
| uint16_t min_rmt_to, uint16_t min_loc_to) { |
| tBTM_PM_MCB* p_cb = btm_pm_get_power_manager_from_address(remote_bda); |
| if (p_cb == nullptr) { |
| LOG_WARN("Unable to find power manager for peer:%s", |
| PRIVATE_ADDRESS(remote_bda)); |
| return BTM_UNKNOWN_ADDR; |
| } |
| |
| if (bluetooth::shim::is_gd_link_policy_enabled()) { |
| return bluetooth::shim::BTM_SetSsrParams(p_cb->handle_, max_lat, min_rmt_to, |
| min_loc_to); |
| } |
| |
| if (p_cb->state == BTM_PM_ST_ACTIVE || p_cb->state == BTM_PM_ST_SNIFF) { |
| LOG_INFO( |
| "Set sniff subrating state:%s[%d] max_latency:0x%04x " |
| "min_remote_timeout:0x%04x" |
| " min_local_timeout:0x%04x", |
| power_mode_state_text(p_cb->state).c_str(), p_cb->state, max_lat, |
| min_rmt_to, min_loc_to); |
| send_sniff_subrating(p_cb->handle_, remote_bda, max_lat, min_rmt_to, |
| min_loc_to); |
| return BTM_SUCCESS; |
| } |
| LOG_INFO("pm_mode_db state: %d", p_cb->state); |
| p_cb->max_lat = max_lat; |
| p_cb->min_rmt_to = min_rmt_to; |
| p_cb->min_loc_to = min_loc_to; |
| return BTM_CMD_STORED; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_pm_reset |
| * |
| * Description as a part of the BTM reset process. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void btm_pm_reset(void) { |
| tBTM_PM_STATUS_CBACK* cb = NULL; |
| |
| /* clear the pending request for application */ |
| if ((pm_pend_id != BTM_PM_SET_ONLY_ID) && (pm_reg_db.mask & BTM_PM_REG_SET)) { |
| cb = pm_reg_db.cback; |
| } |
| |
| pm_reg_db.mask = BTM_PM_REC_NOT_USED; |
| |
| if (cb != NULL && pm_pend_link != 0) { |
| const RawAddress raw_address = pm_mode_db[pm_pend_link].bda_; |
| (*cb)(raw_address, BTM_PM_STS_ERROR, BTM_DEV_RESET, HCI_SUCCESS); |
| } |
| /* no command pending */ |
| pm_pend_link = 0; |
| pm_mode_db.clear(); |
| pm_pend_id = 0; |
| memset(&pm_reg_db, 0, sizeof(pm_reg_db)); |
| LOG_INFO("reset pm"); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_pm_compare_modes |
| * Description get the "more active" mode of the 2 |
| * Returns void |
| * |
| ******************************************************************************/ |
| static tBTM_PM_PWR_MD* btm_pm_compare_modes(const tBTM_PM_PWR_MD* p_md1, |
| const tBTM_PM_PWR_MD* p_md2, |
| tBTM_PM_PWR_MD* p_res) { |
| uint8_t res; |
| |
| if (p_md1 == NULL) { |
| *p_res = *p_md2; |
| p_res->mode &= ~BTM_PM_MD_FORCE; |
| |
| return p_res; |
| } |
| |
| if (p_md2->mode == BTM_PM_MD_ACTIVE || p_md1->mode == BTM_PM_MD_ACTIVE) { |
| return NULL; |
| } |
| |
| /* check if force bit is involved */ |
| if (p_md1->mode & BTM_PM_MD_FORCE) { |
| *p_res = *p_md1; |
| p_res->mode &= ~BTM_PM_MD_FORCE; |
| return p_res; |
| } |
| |
| if (p_md2->mode & BTM_PM_MD_FORCE) { |
| *p_res = *p_md2; |
| p_res->mode &= ~BTM_PM_MD_FORCE; |
| return p_res; |
| } |
| |
| res = (p_md1->mode - 1) * BTM_PM_NUM_SET_MODES + (p_md2->mode - 1); |
| res = btm_pm_md_comp_matrix[res]; |
| switch (res) { |
| case BTM_PM_GET_MD1: |
| *p_res = *p_md1; |
| return p_res; |
| |
| case BTM_PM_GET_MD2: |
| *p_res = *p_md2; |
| return p_res; |
| |
| case BTM_PM_GET_COMP: |
| p_res->mode = p_md1->mode; |
| /* min of the two */ |
| p_res->max = (p_md1->max < p_md2->max) ? (p_md1->max) : (p_md2->max); |
| /* max of the two */ |
| p_res->min = (p_md1->min > p_md2->min) ? (p_md1->min) : (p_md2->min); |
| |
| /* the intersection is NULL */ |
| if (p_res->max < p_res->min) return NULL; |
| |
| if (p_res->mode == BTM_PM_MD_SNIFF) { |
| /* max of the two */ |
| p_res->attempt = (p_md1->attempt > p_md2->attempt) ? (p_md1->attempt) |
| : (p_md2->attempt); |
| p_res->timeout = (p_md1->timeout > p_md2->timeout) ? (p_md1->timeout) |
| : (p_md2->timeout); |
| } |
| return p_res; |
| } |
| return NULL; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_pm_get_set_mode |
| * Description get the resulting mode from the registered parties, then compare |
| * it with the requested mode, if the command is from an |
| * unregistered party. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static tBTM_PM_MODE btm_pm_get_set_mode(uint8_t pm_id, tBTM_PM_MCB* p_cb, |
| const tBTM_PM_PWR_MD* p_mode, |
| tBTM_PM_PWR_MD* p_res) { |
| tBTM_PM_PWR_MD* p_md = NULL; |
| |
| if (p_mode != NULL && p_mode->mode & BTM_PM_MD_FORCE) { |
| *p_res = *p_mode; |
| p_res->mode &= ~BTM_PM_MD_FORCE; |
| return p_res->mode; |
| } |
| |
| /* g through all the registered "set" parties */ |
| if (pm_reg_db.mask & BTM_PM_REG_SET) { |
| if (p_cb->req_mode.mode == BTM_PM_MD_ACTIVE) { |
| /* if at least one registered (SET) party says ACTIVE, stay active */ |
| return BTM_PM_MD_ACTIVE; |
| } else { |
| /* if registered parties give conflicting information, stay active */ |
| if ((btm_pm_compare_modes(p_md, &p_cb->req_mode, p_res)) == NULL) |
| return BTM_PM_MD_ACTIVE; |
| p_md = p_res; |
| } |
| } |
| |
| /* if the resulting mode is NULL(nobody registers SET), use the requested mode |
| */ |
| if (p_md == NULL) { |
| if (p_mode) |
| *p_res = *((tBTM_PM_PWR_MD*)p_mode); |
| else /* p_mode is NULL when btm_pm_snd_md_req is called from |
| btm_pm_proc_mode_change */ |
| return BTM_PM_MD_ACTIVE; |
| } else { |
| /* if the command is from unregistered party, |
| compare the resulting mode from registered party*/ |
| if ((pm_id == BTM_PM_SET_ONLY_ID) && |
| ((btm_pm_compare_modes(p_mode, p_md, p_res)) == NULL)) |
| return BTM_PM_MD_ACTIVE; |
| } |
| |
| return p_res->mode; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_pm_snd_md_req |
| * Description get the resulting mode and send the resuest to host controller |
| * Returns tBTM_STATUS |
| *, bool *p_chg_ind |
| ******************************************************************************/ |
| static tBTM_STATUS btm_pm_snd_md_req(uint16_t handle, uint8_t pm_id, |
| int link_ind, |
| const tBTM_PM_PWR_MD* p_mode) { |
| ASSERT_LOG(pm_mode_db.count(handle) != 0, |
| "Unable to find active acl for handle %d", handle); |
| tBTM_PM_PWR_MD md_res; |
| tBTM_PM_MODE mode; |
| tBTM_PM_MCB* p_cb = &pm_mode_db[handle]; |
| bool chg_ind = false; |
| |
| mode = btm_pm_get_set_mode(pm_id, p_cb, p_mode, &md_res); |
| md_res.mode = mode; |
| |
| LOG_DEBUG("Found controller in mode:%s", power_mode_text(mode).c_str()); |
| |
| if (p_cb->state == mode) { |
| LOG_INFO( |
| "Link already in requested mode pm_id:%hhu link_ind:%d mode:%s[%hhu]", |
| pm_id, link_ind, power_mode_text(mode).c_str(), mode); |
| |
| /* already in the resulting mode */ |
| if ((mode == BTM_PM_MD_ACTIVE) || |
| ((md_res.max >= p_cb->interval) && (md_res.min <= p_cb->interval))) { |
| LOG_DEBUG("Storing command"); |
| return BTM_CMD_STORED; |
| } |
| LOG_DEBUG("Need to wake then sleep"); |
| chg_ind = true; |
| } |
| p_cb->chg_ind = chg_ind; |
| |
| /* cannot go directly from current mode to resulting mode. */ |
| if (mode != BTM_PM_MD_ACTIVE && p_cb->state != BTM_PM_MD_ACTIVE) { |
| LOG_DEBUG("Power mode change delay required"); |
| p_cb->chg_ind = true; /* needs to wake, then sleep */ |
| } |
| |
| if (p_cb->chg_ind) { |
| LOG_DEBUG("Need to wake first"); |
| md_res.mode = BTM_PM_MD_ACTIVE; |
| } else if (BTM_PM_MD_SNIFF == md_res.mode && p_cb->max_lat) { |
| LOG_DEBUG("Sending sniff subrating to controller"); |
| send_sniff_subrating(handle, p_cb->bda_, p_cb->max_lat, p_cb->min_rmt_to, |
| p_cb->min_loc_to); |
| p_cb->max_lat = 0; |
| } |
| /* Default is failure */ |
| pm_pend_link = 0; |
| |
| /* send the appropriate HCI command */ |
| pm_pend_id = pm_id; |
| |
| LOG_INFO("Switching from %s[0x%02x] to %s[0x%02x]", |
| power_mode_state_text(p_cb->state).c_str(), p_cb->state, |
| power_mode_state_text(md_res.mode).c_str(), md_res.mode); |
| BTM_LogHistory(kBtmLogTag, p_cb->bda_, "Power mode change", |
| base::StringPrintf( |
| "%s[0x%02x] ==> %s[0x%02x]", |
| power_mode_state_text(p_cb->state).c_str(), p_cb->state, |
| power_mode_state_text(md_res.mode).c_str(), md_res.mode)); |
| |
| switch (md_res.mode) { |
| case BTM_PM_MD_ACTIVE: |
| switch (p_cb->state) { |
| case BTM_PM_MD_SNIFF: |
| btsnd_hcic_exit_sniff_mode(handle); |
| pm_pend_link = handle; |
| break; |
| case BTM_PM_MD_PARK: |
| btsnd_hcic_exit_park_mode(handle); |
| pm_pend_link = handle; |
| break; |
| default: |
| /* Failure pm_pend_link = MAX_L2CAP_LINKS */ |
| break; |
| } |
| break; |
| |
| case BTM_PM_MD_HOLD: |
| btsnd_hcic_hold_mode(handle, md_res.max, md_res.min); |
| pm_pend_link = handle; |
| break; |
| |
| case BTM_PM_MD_SNIFF: |
| btsnd_hcic_sniff_mode(handle, md_res.max, md_res.min, md_res.attempt, |
| md_res.timeout); |
| pm_pend_link = handle; |
| break; |
| |
| case BTM_PM_MD_PARK: |
| btsnd_hcic_park_mode(handle, md_res.max, md_res.min); |
| pm_pend_link = handle; |
| break; |
| default: |
| /* Failure pm_pend_link = MAX_L2CAP_LINKS */ |
| break; |
| } |
| |
| if (pm_pend_link == 0) { |
| /* the command was not sent */ |
| LOG_ERROR("pm_pending_link maxed out"); |
| return (BTM_NO_RESOURCES); |
| } |
| |
| return BTM_CMD_STARTED; |
| } |
| |
| static void btm_pm_continue_pending_mode_changes() { |
| for (auto& entry : pm_mode_db) { |
| if (entry.second.state & BTM_PM_STORED_MASK) { |
| entry.second.state &= ~BTM_PM_STORED_MASK; |
| LOG_INFO("Found another link requiring power mode change:%s", |
| PRIVATE_ADDRESS(entry.second.bda_)); |
| btm_pm_snd_md_req(entry.second.handle_, BTM_PM_SET_ONLY_ID, |
| entry.second.handle_, NULL); |
| return; |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_pm_proc_cmd_status |
| * |
| * Description This function is called when an HCI command status event |
| * occurs for power manager related commands. |
| * |
| * Input Parms status - status of the event (HCI_SUCCESS if no errors) |
| * |
| * Returns none. |
| * |
| ******************************************************************************/ |
| void btm_pm_proc_cmd_status(tHCI_STATUS status) { |
| if (pm_pend_link == 0) { |
| LOG_ERROR( |
| "There are no links pending power mode changes; try to find other " |
| "pending changes"); |
| btm_pm_continue_pending_mode_changes(); |
| return; |
| } |
| if (pm_mode_db.count(pm_pend_link) == 0) { |
| LOG_ERROR( |
| "Got PM change status for disconnected link %d; forgot to clean up " |
| "pm_pend_link?", |
| pm_pend_link); |
| btm_pm_continue_pending_mode_changes(); |
| return; |
| } |
| |
| tBTM_PM_MCB* p_cb = &pm_mode_db[pm_pend_link]; |
| |
| // if the command was not successful. Stay in the same state |
| tBTM_PM_STATUS pm_status = BTM_PM_STS_ERROR; |
| |
| if (status == HCI_SUCCESS) { |
| p_cb->state = BTM_PM_ST_PENDING; |
| pm_status = BTM_PM_STS_PENDING; |
| } |
| |
| /* notify the caller is appropriate */ |
| if ((pm_pend_id != BTM_PM_SET_ONLY_ID) && (pm_reg_db.mask & BTM_PM_REG_SET)) { |
| const RawAddress bd_addr = pm_mode_db[pm_pend_link].bda_; |
| LOG_DEBUG("Notifying callback that link power mode is complete peer:%s", |
| PRIVATE_ADDRESS(bd_addr)); |
| (*pm_reg_db.cback)(bd_addr, pm_status, 0, status); |
| } |
| |
| LOG_INFO("Clearing pending power mode link state:%s", |
| power_mode_state_text(p_cb->state).c_str()); |
| pm_pend_link = 0; |
| |
| btm_pm_continue_pending_mode_changes(); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_process_mode_change |
| * |
| * Description This function is called when an HCI mode change event |
| * occurs. |
| * |
| * Input Parms hci_status - status of the event (HCI_SUCCESS if no errors) |
| * hci_handle - connection handle associated with the change |
| * mode - HCI_MODE_ACTIVE, HCI_MODE_HOLD, HCI_MODE_SNIFF, or |
| * HCI_MODE_PARK |
| * interval - number of baseband slots (meaning depends on |
| * mode) |
| * |
| * Returns none. |
| * |
| ******************************************************************************/ |
| void btm_pm_proc_mode_change(tHCI_STATUS hci_status, uint16_t hci_handle, |
| tHCI_MODE hci_mode, uint16_t interval) { |
| tBTM_PM_STATUS mode = static_cast<tBTM_PM_STATUS>(hci_mode); |
| tBTM_PM_STATE old_state; |
| |
| /* update control block */ |
| if (pm_mode_db.count(hci_handle) == 0) { |
| LOG_WARN("Unable to find active acl for handle %d", hci_handle); |
| return; |
| } |
| tBTM_PM_MCB* p_cb = &pm_mode_db[hci_handle]; |
| |
| old_state = p_cb->state; |
| p_cb->state = mode; |
| p_cb->interval = interval; |
| |
| LOG_INFO("Power mode switched from %s[%hhu] to %s[%hhu]", |
| power_mode_state_text(old_state).c_str(), old_state, |
| power_mode_state_text(p_cb->state).c_str(), p_cb->state); |
| |
| if ((p_cb->state == BTM_PM_ST_ACTIVE) || (p_cb->state == BTM_PM_ST_SNIFF)) { |
| l2c_OnHciModeChangeSendPendingPackets(p_cb->bda_); |
| } |
| |
| /* set req_mode HOLD mode->ACTIVE */ |
| if ((mode == BTM_PM_MD_ACTIVE) && (p_cb->req_mode.mode == BTM_PM_MD_HOLD)) |
| p_cb->req_mode.mode = BTM_PM_MD_ACTIVE; |
| |
| /* new request has been made. - post a message to BTU task */ |
| if (old_state & BTM_PM_STORED_MASK) { |
| btm_pm_snd_md_req(hci_handle, BTM_PM_SET_ONLY_ID, hci_handle, NULL); |
| } else { |
| for (auto& entry : pm_mode_db) { |
| if (entry.second.chg_ind) { |
| btm_pm_snd_md_req(entry.second.handle_, BTM_PM_SET_ONLY_ID, |
| entry.second.handle_, NULL); |
| break; |
| } |
| } |
| } |
| |
| /* notify registered parties */ |
| if (pm_reg_db.mask & BTM_PM_REG_SET) { |
| (*pm_reg_db.cback)(p_cb->bda_, mode, interval, hci_status); |
| } |
| /*check if sco disconnect is waiting for the mode change */ |
| btm_sco_disc_chk_pend_for_modechange(hci_handle); |
| |
| /* If mode change was because of an active role switch or change link key */ |
| btm_cont_rswitch_from_handle(hci_handle); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_pm_proc_ssr_evt |
| * |
| * Description This function is called when an HCI sniff subrating event |
| * occurs. |
| * |
| * Returns none. |
| * |
| ******************************************************************************/ |
| void process_ssr_event(tHCI_STATUS status, uint16_t handle, |
| UNUSED_ATTR uint16_t max_tx_lat, uint16_t max_rx_lat) { |
| if (pm_mode_db.count(handle) == 0) { |
| LOG_WARN("Received sniff subrating event with no active ACL"); |
| return; |
| } |
| tBTM_PM_MCB* p_cb = &pm_mode_db[handle]; |
| auto bd_addr = p_cb->bda_; |
| |
| bool use_ssr = true; |
| if (p_cb->interval == max_rx_lat) { |
| LOG_DEBUG("Sniff subrating unsupported so dropping to legacy sniff mode"); |
| use_ssr = false; |
| } else { |
| LOG_DEBUG("Sniff subrating enabled"); |
| } |
| |
| int cnt = 0; |
| if (pm_reg_db.mask & BTM_PM_REG_SET) { |
| (*pm_reg_db.cback)(bd_addr, BTM_PM_STS_SSR, (use_ssr) ? 1 : 0, status); |
| cnt++; |
| } |
| LOG_DEBUG( |
| "Notified sniff subrating registered clients cnt:%d peer:%s use_ssr:%s " |
| "status:%s", |
| cnt, PRIVATE_ADDRESS(bd_addr), logbool(use_ssr).c_str(), |
| hci_error_code_text(status).c_str()); |
| } |
| |
| void btm_pm_on_sniff_subrating(tHCI_STATUS status, uint16_t handle, |
| uint16_t maximum_transmit_latency, |
| uint16_t maximum_receive_latency, |
| uint16_t minimum_remote_timeout, |
| uint16_t minimum_local_timeout) { |
| if (bluetooth::shim::is_gd_link_policy_enabled()) { |
| return bluetooth::shim::btm_pm_on_sniff_subrating( |
| status, handle, maximum_transmit_latency, maximum_receive_latency, |
| minimum_remote_timeout, minimum_local_timeout); |
| } |
| process_ssr_event(status, handle, maximum_transmit_latency, |
| maximum_receive_latency); |
| } |
| |
| void btm_pm_proc_ssr_evt(uint8_t* p, UNUSED_ATTR uint16_t evt_len) { |
| uint8_t status; |
| uint16_t handle; |
| uint16_t max_tx_lat; |
| uint16_t max_rx_lat; |
| |
| STREAM_TO_UINT8(status, p); |
| STREAM_TO_UINT16(handle, p); |
| STREAM_TO_UINT16(max_tx_lat, p); |
| STREAM_TO_UINT16(max_rx_lat, p); |
| |
| process_ssr_event(static_cast<tHCI_STATUS>(status), handle, max_tx_lat, |
| max_rx_lat); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_pm_device_in_active_or_sniff_mode |
| * |
| * Description This function is called to check if in active or sniff mode |
| * |
| * Returns true, if in active or sniff mode |
| * |
| ******************************************************************************/ |
| static bool btm_pm_device_in_active_or_sniff_mode(void) { |
| /* The active state is the highest state-includes connected device and sniff |
| * mode*/ |
| |
| /* Covers active and sniff modes */ |
| if (!pm_mode_db.empty()) { |
| return true; |
| } |
| |
| /* Check BLE states */ |
| if (!btm_cb.ble_ctr_cb.is_connection_state_idle()) { |
| BTM_TRACE_DEBUG("%s - BLE state is not idle", __func__); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function btm_pm_device_in_scan_state |
| * |
| * Description This function is called to check if in paging, inquiry or |
| * connecting mode |
| * |
| * Returns true, if in paging, inquiry or connecting mode |
| * |
| ******************************************************************************/ |
| static bool btm_pm_device_in_scan_state(void) { |
| /* Scan state-paging, inquiry, and trying to connect */ |
| |
| /* Check for paging */ |
| if (btm_cb.is_paging || !fixed_queue_is_empty(btm_cb.page_queue)) { |
| BTM_TRACE_DEBUG("btm_pm_device_in_scan_state- paging"); |
| return true; |
| } |
| |
| /* Check for inquiry */ |
| if ((btm_cb.btm_inq_vars.inq_active & |
| (BTM_BR_INQ_ACTIVE_MASK | BTM_BLE_INQ_ACTIVE_MASK)) != 0) { |
| BTM_TRACE_DEBUG("btm_pm_device_in_scan_state- Inq active"); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function BTM_PM_ReadControllerState |
| * |
| * Description This function is called to obtain the controller state |
| * |
| * Returns Controller State-BTM_CONTRL_ACTIVE, BTM_CONTRL_SCAN, and |
| * BTM_CONTRL_IDLE |
| * |
| ******************************************************************************/ |
| tBTM_CONTRL_STATE BTM_PM_ReadControllerState(void) { |
| if (btm_pm_device_in_active_or_sniff_mode()) |
| return BTM_CONTRL_ACTIVE; |
| else if (btm_pm_device_in_scan_state()) |
| return BTM_CONTRL_SCAN; |
| else |
| return BTM_CONTRL_IDLE; |
| } |
| |
| void btm_pm_on_mode_change(tHCI_STATUS status, uint16_t handle, |
| tHCI_MODE current_mode, uint16_t interval) { |
| if (bluetooth::shim::is_gd_link_policy_enabled()) { |
| return bluetooth::shim::btm_pm_on_mode_change(status, handle, current_mode, |
| interval); |
| } |
| |
| btm_sco_chk_pend_unpark(status, handle); |
| btm_pm_proc_mode_change(status, handle, current_mode, interval); |
| } |
