From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/net/wireless/iwlwifi/mvm/tt.c | 468 ++++++++++++++++++++++++++++++++++ 1 file changed, 468 insertions(+) create mode 100644 drivers/net/wireless/iwlwifi/mvm/tt.c (limited to 'drivers/net/wireless/iwlwifi/mvm/tt.c') diff --git a/drivers/net/wireless/iwlwifi/mvm/tt.c b/drivers/net/wireless/iwlwifi/mvm/tt.c new file mode 100644 index 000000000..ba615ad21 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/mvm/tt.c @@ -0,0 +1,468 @@ +/****************************************************************************** + * + * 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 + * 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 = 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); + + 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; +} + +int iwl_mvm_temp_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb, + struct iwl_device_cmd *cmd) +{ + 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 0; + + temp = iwl_mvm_temp_notif_parse(mvm, pkt); + if (temp < 0) + return 0; + + iwl_mvm_tt_temp_changed(mvm, temp); + + return 0; +} + +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) +{ + 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->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"); +} -- cgit v1.2.3