/****************************************************************************** * * 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" #include "iwl-config.h" #include "iwl-io.h" #include "iwl-csr.h" #include "iwl-prph.h" #define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm) { u32 duration = mvm->thermal_throttle.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); /* 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(&mvm->thermal_throttle.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); } static bool iwl_mvm_temp_notif(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; struct iwl_dts_measurement_notif *notif; int len = iwl_rx_packet_payload_len(pkt); if (WARN_ON_ONCE(len != sizeof(*notif))) { IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n"); return true; } 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 true; } 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, &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) { const 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 <= tt->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 iwl7000_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, }; static const struct iwl_tt_params iwl7000_high_temp_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 = 300}, {.temperature = 113, .backoff = 800}, {.temperature = 114, .backoff = 1500}, {.temperature = 115, .backoff = 3000}, {.temperature = 116, .backoff = 5000}, {.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->high_temp) tt->params = &iwl7000_high_temp_tt_params; else tt->params = &iwl7000_tt_params; tt->throttle = 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"); }