| /****************************************************************************** |
| * |
| * This file is provided under a dual BSD/GPLv2 license. When using or |
| * redistributing this file, you may do so under either license. |
| * |
| * GPL LICENSE SUMMARY |
| * |
| * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. |
| * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, |
| * USA |
| * |
| * The full GNU General Public License is included in this distribution |
| * in the file called COPYING. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
| * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name Intel Corporation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| *****************************************************************************/ |
| |
| #include "mvm.h" |
| |
| #define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ |
| |
| static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm) |
| { |
| struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle; |
| u32 duration = tt->params.ct_kill_duration; |
| |
| if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status)) |
| return; |
| |
| IWL_ERR(mvm, "Enter CT Kill\n"); |
| iwl_mvm_set_hw_ctkill_state(mvm, true); |
| |
| tt->throttle = false; |
| tt->dynamic_smps = false; |
| |
| /* Don't schedule an exit work if we're in test mode, since |
| * the temperature will not change unless we manually set it |
| * again (or disable testing). |
| */ |
| if (!mvm->temperature_test) |
| schedule_delayed_work(&tt->ct_kill_exit, |
| round_jiffies_relative(duration * HZ)); |
| } |
| |
| static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm) |
| { |
| if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status)) |
| return; |
| |
| IWL_ERR(mvm, "Exit CT Kill\n"); |
| iwl_mvm_set_hw_ctkill_state(mvm, false); |
| } |
| |
| void iwl_mvm_tt_temp_changed(struct iwl_mvm *mvm, u32 temp) |
| { |
| /* ignore the notification if we are in test mode */ |
| if (mvm->temperature_test) |
| return; |
| |
| if (mvm->temperature == temp) |
| return; |
| |
| mvm->temperature = temp; |
| iwl_mvm_tt_handler(mvm); |
| } |
| |
| static int iwl_mvm_temp_notif_parse(struct iwl_mvm *mvm, |
| struct iwl_rx_packet *pkt) |
| { |
| struct iwl_dts_measurement_notif *notif; |
| int len = iwl_rx_packet_payload_len(pkt); |
| int temp; |
| |
| if (WARN_ON_ONCE(len != sizeof(*notif))) { |
| IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n"); |
| return -EINVAL; |
| } |
| |
| notif = (void *)pkt->data; |
| |
| temp = le32_to_cpu(notif->temp); |
| |
| /* shouldn't be negative, but since it's s32, make sure it isn't */ |
| if (WARN_ON_ONCE(temp < 0)) |
| temp = 0; |
| |
| IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", temp); |
| |
| return temp; |
| } |
| |
| static bool iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data *notif_wait, |
| struct iwl_rx_packet *pkt, void *data) |
| { |
| struct iwl_mvm *mvm = |
| container_of(notif_wait, struct iwl_mvm, notif_wait); |
| int *temp = data; |
| int ret; |
| |
| ret = iwl_mvm_temp_notif_parse(mvm, pkt); |
| if (ret < 0) |
| return true; |
| |
| *temp = ret; |
| |
| return true; |
| } |
| |
| void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| int temp; |
| |
| /* the notification is handled synchronously in ctkill, so skip here */ |
| if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status)) |
| return; |
| |
| temp = iwl_mvm_temp_notif_parse(mvm, pkt); |
| if (temp < 0) |
| return; |
| |
| iwl_mvm_tt_temp_changed(mvm, temp); |
| } |
| |
| static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm) |
| { |
| struct iwl_dts_measurement_cmd cmd = { |
| .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP), |
| }; |
| |
| return iwl_mvm_send_cmd_pdu(mvm, CMD_DTS_MEASUREMENT_TRIGGER, 0, |
| sizeof(cmd), &cmd); |
| } |
| |
| int iwl_mvm_get_temp(struct iwl_mvm *mvm) |
| { |
| struct iwl_notification_wait wait_temp_notif; |
| static const u8 temp_notif[] = { DTS_MEASUREMENT_NOTIFICATION }; |
| int ret, temp; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif, |
| temp_notif, ARRAY_SIZE(temp_notif), |
| iwl_mvm_temp_notif_wait, &temp); |
| |
| ret = iwl_mvm_get_temp_cmd(mvm); |
| if (ret) { |
| IWL_ERR(mvm, "Failed to get the temperature (err=%d)\n", ret); |
| iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif); |
| return ret; |
| } |
| |
| ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif, |
| IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT); |
| if (ret) { |
| IWL_ERR(mvm, "Getting the temperature timed out\n"); |
| return ret; |
| } |
| |
| return temp; |
| } |
| |
| static void check_exit_ctkill(struct work_struct *work) |
| { |
| struct iwl_mvm_tt_mgmt *tt; |
| struct iwl_mvm *mvm; |
| u32 duration; |
| s32 temp; |
| |
| tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work); |
| mvm = container_of(tt, struct iwl_mvm, thermal_throttle); |
| |
| duration = tt->params.ct_kill_duration; |
| |
| mutex_lock(&mvm->mutex); |
| |
| if (__iwl_mvm_mac_start(mvm)) |
| goto reschedule; |
| |
| /* make sure the device is available for direct read/writes */ |
| if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) { |
| __iwl_mvm_mac_stop(mvm); |
| goto reschedule; |
| } |
| |
| temp = iwl_mvm_get_temp(mvm); |
| |
| iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL); |
| |
| __iwl_mvm_mac_stop(mvm); |
| |
| if (temp < 0) |
| goto reschedule; |
| |
| IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp); |
| |
| if (temp <= tt->params.ct_kill_exit) { |
| mutex_unlock(&mvm->mutex); |
| iwl_mvm_exit_ctkill(mvm); |
| return; |
| } |
| |
| reschedule: |
| mutex_unlock(&mvm->mutex); |
| schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit, |
| round_jiffies(duration * HZ)); |
| } |
| |
| static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac, |
| struct ieee80211_vif *vif) |
| { |
| struct iwl_mvm *mvm = _data; |
| enum ieee80211_smps_mode smps_mode; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| if (mvm->thermal_throttle.dynamic_smps) |
| smps_mode = IEEE80211_SMPS_DYNAMIC; |
| else |
| smps_mode = IEEE80211_SMPS_AUTOMATIC; |
| |
| if (vif->type != NL80211_IFTYPE_STATION) |
| return; |
| |
| iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode); |
| } |
| |
| static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable) |
| { |
| struct ieee80211_sta *sta; |
| struct iwl_mvm_sta *mvmsta; |
| int i, err; |
| |
| for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { |
| sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], |
| lockdep_is_held(&mvm->mutex)); |
| if (IS_ERR_OR_NULL(sta)) |
| continue; |
| mvmsta = iwl_mvm_sta_from_mac80211(sta); |
| if (enable == mvmsta->tt_tx_protection) |
| continue; |
| err = iwl_mvm_tx_protection(mvm, mvmsta, enable); |
| if (err) { |
| IWL_ERR(mvm, "Failed to %s Tx protection\n", |
| enable ? "enable" : "disable"); |
| } else { |
| IWL_DEBUG_TEMP(mvm, "%s Tx protection\n", |
| enable ? "Enable" : "Disable"); |
| mvmsta->tt_tx_protection = enable; |
| } |
| } |
| } |
| |
| void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff) |
| { |
| struct iwl_host_cmd cmd = { |
| .id = REPLY_THERMAL_MNG_BACKOFF, |
| .len = { sizeof(u32), }, |
| .data = { &backoff, }, |
| }; |
| |
| backoff = max(backoff, mvm->thermal_throttle.min_backoff); |
| |
| if (iwl_mvm_send_cmd(mvm, &cmd) == 0) { |
| IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n", |
| backoff); |
| mvm->thermal_throttle.tx_backoff = backoff; |
| } else { |
| IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n"); |
| } |
| } |
| |
| void iwl_mvm_tt_handler(struct iwl_mvm *mvm) |
| { |
| struct iwl_tt_params *params = &mvm->thermal_throttle.params; |
| struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle; |
| s32 temperature = mvm->temperature; |
| bool throttle_enable = false; |
| int i; |
| u32 tx_backoff; |
| |
| IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature); |
| |
| if (params->support_ct_kill && temperature >= params->ct_kill_entry) { |
| iwl_mvm_enter_ctkill(mvm); |
| return; |
| } |
| |
| if (params->support_ct_kill && |
| temperature <= params->ct_kill_exit) { |
| iwl_mvm_exit_ctkill(mvm); |
| return; |
| } |
| |
| if (params->support_dynamic_smps) { |
| if (!tt->dynamic_smps && |
| temperature >= params->dynamic_smps_entry) { |
| IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n"); |
| tt->dynamic_smps = true; |
| ieee80211_iterate_active_interfaces_atomic( |
| mvm->hw, IEEE80211_IFACE_ITER_NORMAL, |
| iwl_mvm_tt_smps_iterator, mvm); |
| throttle_enable = true; |
| } else if (tt->dynamic_smps && |
| temperature <= params->dynamic_smps_exit) { |
| IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n"); |
| tt->dynamic_smps = false; |
| ieee80211_iterate_active_interfaces_atomic( |
| mvm->hw, IEEE80211_IFACE_ITER_NORMAL, |
| iwl_mvm_tt_smps_iterator, mvm); |
| } |
| } |
| |
| if (params->support_tx_protection) { |
| if (temperature >= params->tx_protection_entry) { |
| iwl_mvm_tt_tx_protection(mvm, true); |
| throttle_enable = true; |
| } else if (temperature <= params->tx_protection_exit) { |
| iwl_mvm_tt_tx_protection(mvm, false); |
| } |
| } |
| |
| if (params->support_tx_backoff) { |
| tx_backoff = tt->min_backoff; |
| for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) { |
| if (temperature < params->tx_backoff[i].temperature) |
| break; |
| tx_backoff = max(tt->min_backoff, |
| params->tx_backoff[i].backoff); |
| } |
| if (tx_backoff != tt->min_backoff) |
| throttle_enable = true; |
| if (tt->tx_backoff != tx_backoff) |
| iwl_mvm_tt_tx_backoff(mvm, tx_backoff); |
| } |
| |
| if (!tt->throttle && throttle_enable) { |
| IWL_WARN(mvm, |
| "Due to high temperature thermal throttling initiated\n"); |
| tt->throttle = true; |
| } else if (tt->throttle && !tt->dynamic_smps && |
| tt->tx_backoff == tt->min_backoff && |
| temperature <= params->tx_protection_exit) { |
| IWL_WARN(mvm, |
| "Temperature is back to normal thermal throttling stopped\n"); |
| tt->throttle = false; |
| } |
| } |
| |
| static const struct iwl_tt_params iwl_mvm_default_tt_params = { |
| .ct_kill_entry = 118, |
| .ct_kill_exit = 96, |
| .ct_kill_duration = 5, |
| .dynamic_smps_entry = 114, |
| .dynamic_smps_exit = 110, |
| .tx_protection_entry = 114, |
| .tx_protection_exit = 108, |
| .tx_backoff = { |
| {.temperature = 112, .backoff = 200}, |
| {.temperature = 113, .backoff = 600}, |
| {.temperature = 114, .backoff = 1200}, |
| {.temperature = 115, .backoff = 2000}, |
| {.temperature = 116, .backoff = 4000}, |
| {.temperature = 117, .backoff = 10000}, |
| }, |
| .support_ct_kill = true, |
| .support_dynamic_smps = true, |
| .support_tx_protection = true, |
| .support_tx_backoff = true, |
| }; |
| |
| void iwl_mvm_tt_initialize(struct iwl_mvm *mvm, u32 min_backoff) |
| { |
| struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle; |
| |
| IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n"); |
| |
| if (mvm->cfg->thermal_params) |
| tt->params = *mvm->cfg->thermal_params; |
| else |
| tt->params = iwl_mvm_default_tt_params; |
| |
| tt->throttle = false; |
| tt->dynamic_smps = false; |
| tt->min_backoff = min_backoff; |
| INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill); |
| } |
| |
| void iwl_mvm_tt_exit(struct iwl_mvm *mvm) |
| { |
| cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit); |
| IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n"); |
| } |