419 lines
12 KiB
C
419 lines
12 KiB
C
/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called COPYING.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*****************************************************************************/
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#include "mvm.h"
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#include "iwl-config.h"
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#include "iwl-io.h"
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#include "iwl-csr.h"
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#include "iwl-prph.h"
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#define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ
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static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
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{
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u32 duration = mvm->thermal_throttle.params->ct_kill_duration;
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if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
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return;
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IWL_ERR(mvm, "Enter CT Kill\n");
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iwl_mvm_set_hw_ctkill_state(mvm, true);
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/* Don't schedule an exit work if we're in test mode, since
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* the temperature will not change unless we manually set it
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* again (or disable testing).
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*/
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if (!mvm->temperature_test)
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schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
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round_jiffies_relative(duration * HZ));
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}
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static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
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{
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if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
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return;
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IWL_ERR(mvm, "Exit CT Kill\n");
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iwl_mvm_set_hw_ctkill_state(mvm, false);
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}
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static bool iwl_mvm_temp_notif(struct iwl_notif_wait_data *notif_wait,
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struct iwl_rx_packet *pkt, void *data)
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{
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struct iwl_mvm *mvm =
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container_of(notif_wait, struct iwl_mvm, notif_wait);
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int *temp = data;
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struct iwl_dts_measurement_notif *notif;
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int len = iwl_rx_packet_payload_len(pkt);
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if (WARN_ON_ONCE(len != sizeof(*notif))) {
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IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
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return true;
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}
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notif = (void *)pkt->data;
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*temp = le32_to_cpu(notif->temp);
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/* shouldn't be negative, but since it's s32, make sure it isn't */
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if (WARN_ON_ONCE(*temp < 0))
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*temp = 0;
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IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", *temp);
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return true;
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}
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static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm)
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{
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struct iwl_dts_measurement_cmd cmd = {
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.flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
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};
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return iwl_mvm_send_cmd_pdu(mvm, CMD_DTS_MEASUREMENT_TRIGGER, 0,
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sizeof(cmd), &cmd);
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}
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int iwl_mvm_get_temp(struct iwl_mvm *mvm)
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{
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struct iwl_notification_wait wait_temp_notif;
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static const u8 temp_notif[] = { DTS_MEASUREMENT_NOTIFICATION };
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int ret, temp;
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lockdep_assert_held(&mvm->mutex);
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iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
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temp_notif, ARRAY_SIZE(temp_notif),
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iwl_mvm_temp_notif, &temp);
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ret = iwl_mvm_get_temp_cmd(mvm);
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if (ret) {
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IWL_ERR(mvm, "Failed to get the temperature (err=%d)\n", ret);
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iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
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return ret;
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}
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ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
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IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
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if (ret) {
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IWL_ERR(mvm, "Getting the temperature timed out\n");
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return ret;
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}
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return temp;
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}
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static void check_exit_ctkill(struct work_struct *work)
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{
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struct iwl_mvm_tt_mgmt *tt;
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struct iwl_mvm *mvm;
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u32 duration;
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s32 temp;
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tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
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mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
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duration = tt->params->ct_kill_duration;
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mutex_lock(&mvm->mutex);
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if (__iwl_mvm_mac_start(mvm))
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goto reschedule;
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/* make sure the device is available for direct read/writes */
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if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) {
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__iwl_mvm_mac_stop(mvm);
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goto reschedule;
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}
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temp = iwl_mvm_get_temp(mvm);
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iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL);
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__iwl_mvm_mac_stop(mvm);
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if (temp < 0)
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goto reschedule;
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IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
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if (temp <= tt->params->ct_kill_exit) {
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mutex_unlock(&mvm->mutex);
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iwl_mvm_exit_ctkill(mvm);
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return;
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}
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reschedule:
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mutex_unlock(&mvm->mutex);
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schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
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round_jiffies(duration * HZ));
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}
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static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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struct iwl_mvm *mvm = _data;
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enum ieee80211_smps_mode smps_mode;
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lockdep_assert_held(&mvm->mutex);
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if (mvm->thermal_throttle.dynamic_smps)
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smps_mode = IEEE80211_SMPS_DYNAMIC;
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else
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smps_mode = IEEE80211_SMPS_AUTOMATIC;
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if (vif->type != NL80211_IFTYPE_STATION)
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return;
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iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode);
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}
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static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
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{
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struct ieee80211_sta *sta;
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struct iwl_mvm_sta *mvmsta;
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int i, err;
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for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
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sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
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lockdep_is_held(&mvm->mutex));
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if (IS_ERR_OR_NULL(sta))
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continue;
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mvmsta = iwl_mvm_sta_from_mac80211(sta);
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if (enable == mvmsta->tt_tx_protection)
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continue;
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err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
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if (err) {
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IWL_ERR(mvm, "Failed to %s Tx protection\n",
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enable ? "enable" : "disable");
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} else {
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IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
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enable ? "Enable" : "Disable");
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mvmsta->tt_tx_protection = enable;
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}
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}
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}
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void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
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{
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struct iwl_host_cmd cmd = {
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.id = REPLY_THERMAL_MNG_BACKOFF,
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.len = { sizeof(u32), },
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.data = { &backoff, },
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};
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backoff = max(backoff, mvm->thermal_throttle.min_backoff);
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if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
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IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
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backoff);
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mvm->thermal_throttle.tx_backoff = backoff;
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} else {
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IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
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}
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}
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void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
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{
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const struct iwl_tt_params *params = mvm->thermal_throttle.params;
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struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
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s32 temperature = mvm->temperature;
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bool throttle_enable = false;
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int i;
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u32 tx_backoff;
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IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
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if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
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iwl_mvm_enter_ctkill(mvm);
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return;
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}
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if (params->support_ct_kill &&
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temperature <= tt->params->ct_kill_exit) {
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iwl_mvm_exit_ctkill(mvm);
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return;
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}
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if (params->support_dynamic_smps) {
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if (!tt->dynamic_smps &&
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temperature >= params->dynamic_smps_entry) {
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IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
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tt->dynamic_smps = true;
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ieee80211_iterate_active_interfaces_atomic(
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mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
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iwl_mvm_tt_smps_iterator, mvm);
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throttle_enable = true;
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} else if (tt->dynamic_smps &&
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temperature <= params->dynamic_smps_exit) {
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IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
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tt->dynamic_smps = false;
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ieee80211_iterate_active_interfaces_atomic(
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mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
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iwl_mvm_tt_smps_iterator, mvm);
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}
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}
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if (params->support_tx_protection) {
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if (temperature >= params->tx_protection_entry) {
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iwl_mvm_tt_tx_protection(mvm, true);
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throttle_enable = true;
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} else if (temperature <= params->tx_protection_exit) {
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iwl_mvm_tt_tx_protection(mvm, false);
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}
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}
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if (params->support_tx_backoff) {
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tx_backoff = tt->min_backoff;
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for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
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if (temperature < params->tx_backoff[i].temperature)
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break;
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tx_backoff = max(tt->min_backoff,
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params->tx_backoff[i].backoff);
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}
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if (tx_backoff != tt->min_backoff)
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throttle_enable = true;
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if (tt->tx_backoff != tx_backoff)
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iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
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}
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if (!tt->throttle && throttle_enable) {
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IWL_WARN(mvm,
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"Due to high temperature thermal throttling initiated\n");
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tt->throttle = true;
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} else if (tt->throttle && !tt->dynamic_smps &&
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tt->tx_backoff == tt->min_backoff &&
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temperature <= params->tx_protection_exit) {
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IWL_WARN(mvm,
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"Temperature is back to normal thermal throttling stopped\n");
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tt->throttle = false;
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}
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}
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static const struct iwl_tt_params iwl7000_tt_params = {
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.ct_kill_entry = 118,
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.ct_kill_exit = 96,
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.ct_kill_duration = 5,
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.dynamic_smps_entry = 114,
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.dynamic_smps_exit = 110,
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.tx_protection_entry = 114,
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.tx_protection_exit = 108,
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.tx_backoff = {
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{.temperature = 112, .backoff = 200},
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{.temperature = 113, .backoff = 600},
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{.temperature = 114, .backoff = 1200},
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{.temperature = 115, .backoff = 2000},
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{.temperature = 116, .backoff = 4000},
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{.temperature = 117, .backoff = 10000},
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},
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.support_ct_kill = true,
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.support_dynamic_smps = true,
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.support_tx_protection = true,
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.support_tx_backoff = true,
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};
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static const struct iwl_tt_params iwl7000_high_temp_tt_params = {
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.ct_kill_entry = 118,
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.ct_kill_exit = 96,
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.ct_kill_duration = 5,
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.dynamic_smps_entry = 114,
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.dynamic_smps_exit = 110,
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.tx_protection_entry = 114,
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.tx_protection_exit = 108,
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.tx_backoff = {
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{.temperature = 112, .backoff = 300},
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{.temperature = 113, .backoff = 800},
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{.temperature = 114, .backoff = 1500},
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{.temperature = 115, .backoff = 3000},
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{.temperature = 116, .backoff = 5000},
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{.temperature = 117, .backoff = 10000},
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},
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.support_ct_kill = true,
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.support_dynamic_smps = true,
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.support_tx_protection = true,
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.support_tx_backoff = true,
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};
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void iwl_mvm_tt_initialize(struct iwl_mvm *mvm, u32 min_backoff)
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{
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struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
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IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
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if (mvm->cfg->high_temp)
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tt->params = &iwl7000_high_temp_tt_params;
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else
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tt->params = &iwl7000_tt_params;
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tt->throttle = false;
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tt->min_backoff = min_backoff;
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INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
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}
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void iwl_mvm_tt_exit(struct iwl_mvm *mvm)
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{
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cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
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IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
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}
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