+++ /dev/null
-/******************************************************************************
- *
- * 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
- * Copyright(c) 2015 Intel Deutschland 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),
- };
- struct iwl_ext_dts_measurement_cmd extcmd = {
- .control_mode = cpu_to_le32(DTS_AUTOMATIC),
- };
- u32 cmdid;
-
- if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIDE_CMD_HDR))
- cmdid = iwl_cmd_id(CMD_DTS_MEASUREMENT_TRIGGER_WIDE,
- PHY_OPS_GROUP, 0);
- else
- cmdid = CMD_DTS_MEASUREMENT_TRIGGER;
-
- if (!fw_has_capa(&mvm->fw->ucode_capa,
- IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE))
- return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(cmd), &cmd);
-
- return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(extcmd), &extcmd);
-}
-
-int iwl_mvm_get_temp(struct iwl_mvm *mvm)
-{
- struct iwl_notification_wait wait_temp_notif;
- static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
- DTS_MEASUREMENT_NOTIF_WIDE) };
- int ret, temp;
-
- if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_WIDE_CMD_HDR))
- temp_notif[0] = DTS_MEASUREMENT_NOTIFICATION;
-
- 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");
-}
projects / cascardo / linux.git / blobdiff