[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / tt.c

/******************************************************************************
 *
 * 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;
}

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)
{
	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");
}
Commit	Line	Data
9ee718aa EL	1	/******************************************************************************
	2	*
	3	* This file is provided under a dual BSD/GPLv2 license. When using or
	4	* redistributing this file, you may do so under either license.
	5	*
	6	* GPL LICENSE SUMMARY
	7	*
51368bf7	8	* Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
8b4139dc	9	* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
9ee718aa EL	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of version 2 of the GNU General Public License as
	13	* published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope that it will be useful, but
	16	* WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
	23	* USA
	24	*
	25	* The full GNU General Public License is included in this distribution
	26	* in the file called COPYING.
	27	*
	28	* Contact Information:
	29	* Intel Linux Wireless <ilw@linux.intel.com>
	30	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	31	*
	32	* BSD LICENSE
	33	*
51368bf7	34	* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
8b4139dc	35	* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
9ee718aa EL	36	* All rights reserved.
	37	*
	38	* Redistribution and use in source and binary forms, with or without
	39	* modification, are permitted provided that the following conditions
	40	* are met:
	41	*
	42	* * Redistributions of source code must retain the above copyright
	43	* notice, this list of conditions and the following disclaimer.
	44	* * Redistributions in binary form must reproduce the above copyright
	45	* notice, this list of conditions and the following disclaimer in
	46	* the documentation and/or other materials provided with the
	47	* distribution.
	48	* * Neither the name Intel Corporation nor the names of its
	49	* contributors may be used to endorse or promote products derived
	50	* from this software without specific prior written permission.
	51	*
	52	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	53	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	54	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	55	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	56	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	57	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	58	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	59	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	60	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	61	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	62	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	63	*
	64	*****************************************************************************/
	65
	66	#include "mvm.h"
9ee718aa	67
a0a09243	68	#define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ
9ee718aa	69
a0a09243	70	static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
9ee718aa	71	{
19789abb	72	struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
3444682a	73	u32 duration = tt->params.ct_kill_duration;
9ee718aa	74
a0a09243 LC	75	if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
a0a09243 LC	76	return;
9ee718aa	77
a0a09243 LC	78	IWL_ERR(mvm, "Enter CT Kill\n");
a0a09243 LC	79	iwl_mvm_set_hw_ctkill_state(mvm, true);
9ee718aa	80
19789abb LC	81	tt->throttle = false;
	82	tt->dynamic_smps = false;
	83
a0a09243 LC	84	/* Don't schedule an exit work if we're in test mode, since
	85	* the temperature will not change unless we manually set it
	86	* again (or disable testing).
	87	*/
	88	if (!mvm->temperature_test)
19789abb	89	schedule_delayed_work(&tt->ct_kill_exit,
a0a09243	90	round_jiffies_relative(duration * HZ));
9ee718aa EL	91	}
9ee718aa EL	92
a0a09243	93	static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
9ee718aa	94	{
a0a09243 LC	95	if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
a0a09243 LC	96	return;
9ee718aa	97
a0a09243 LC	98	IWL_ERR(mvm, "Exit CT Kill\n");
a0a09243 LC	99	iwl_mvm_set_hw_ctkill_state(mvm, false);
9ee718aa EL	100	}
9ee718aa EL	101
fd1f7550 LC	102	void iwl_mvm_tt_temp_changed(struct iwl_mvm *mvm, u32 temp)
	103	{
	104	/* ignore the notification if we are in test mode */
	105	if (mvm->temperature_test)
	106	return;
	107
	108	if (mvm->temperature == temp)
	109	return;
	110
	111	mvm->temperature = temp;
	112	iwl_mvm_tt_handler(mvm);
	113	}
	114
	115	static int iwl_mvm_temp_notif_parse(struct iwl_mvm *mvm,
	116	struct iwl_rx_packet *pkt)
9ee718aa	117	{
a0a09243 LC	118	struct iwl_dts_measurement_notif *notif;
a0a09243 LC	119	int len = iwl_rx_packet_payload_len(pkt);
fd1f7550	120	int temp;
a0a09243 LC	121
	122	if (WARN_ON_ONCE(len != sizeof(*notif))) {
	123	IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
fd1f7550	124	return -EINVAL;
a0a09243	125	}
9ee718aa	126
a0a09243	127	notif = (void *)pkt->data;
9ee718aa	128
fd1f7550	129	temp = le32_to_cpu(notif->temp);
9ee718aa	130
a0a09243	131	/* shouldn't be negative, but since it's s32, make sure it isn't */
fd1f7550 LC	132	if (WARN_ON_ONCE(temp < 0))
	133	temp = 0;
	134
	135	IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", temp);
	136
	137	return temp;
	138	}
	139
	140	static bool iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data *notif_wait,
	141	struct iwl_rx_packet pkt, void data)
	142	{
	143	struct iwl_mvm *mvm =
	144	container_of(notif_wait, struct iwl_mvm, notif_wait);
	145	int *temp = data;
	146	int ret;
	147
	148	ret = iwl_mvm_temp_notif_parse(mvm, pkt);
	149	if (ret < 0)
	150	return true;
	151
	152	*temp = ret;
9ee718aa	153
a0a09243	154	return true;
9ee718aa EL	155	}
9ee718aa EL	156
ea9af24d LC	157	int iwl_mvm_temp_notif(struct iwl_mvm *mvm,
	158	struct iwl_rx_cmd_buffer *rxb,
	159	struct iwl_device_cmd *cmd)
	160	{
	161	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	162	int temp;
	163
	164	/* the notification is handled synchronously in ctkill, so skip here */
	165	if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
	166	return 0;
	167
	168	temp = iwl_mvm_temp_notif_parse(mvm, pkt);
	169	if (temp < 0)
	170	return 0;
	171
	172	iwl_mvm_tt_temp_changed(mvm, temp);
	173
	174	return 0;
	175	}
	176
a0a09243	177	static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm)
9ee718aa	178	{
a0a09243 LC	179	struct iwl_dts_measurement_cmd cmd = {
a0a09243 LC	180	.flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
9ee718aa EL	181	};
9ee718aa EL	182
a0a09243 LC	183	return iwl_mvm_send_cmd_pdu(mvm, CMD_DTS_MEASUREMENT_TRIGGER, 0,
a0a09243 LC	184	sizeof(cmd), &cmd);
9ee718aa EL	185	}
9ee718aa EL	186
c549e390	187	int iwl_mvm_get_temp(struct iwl_mvm *mvm)
9ee718aa	188	{
a0a09243 LC	189	struct iwl_notification_wait wait_temp_notif;
	190	static const u8 temp_notif[] = { DTS_MEASUREMENT_NOTIFICATION };
	191	int ret, temp;
9ee718aa	192
a0a09243	193	lockdep_assert_held(&mvm->mutex);
b689fa79	194
a0a09243 LC	195	iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
a0a09243 LC	196	temp_notif, ARRAY_SIZE(temp_notif),
fd1f7550	197	iwl_mvm_temp_notif_wait, &temp);
efc36dbd	198
a0a09243 LC	199	ret = iwl_mvm_get_temp_cmd(mvm);
	200	if (ret) {
	201	IWL_ERR(mvm, "Failed to get the temperature (err=%d)\n", ret);
	202	iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
	203	return ret;
	204	}
9ee718aa	205
a0a09243 LC	206	ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
	207	IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
	208	if (ret) {
	209	IWL_ERR(mvm, "Getting the temperature timed out\n");
	210	return ret;
	211	}
b689fa79	212
a0a09243	213	return temp;
9ee718aa EL	214	}
	215
	216	static void check_exit_ctkill(struct work_struct *work)
	217	{
	218	struct iwl_mvm_tt_mgmt *tt;
	219	struct iwl_mvm *mvm;
	220	u32 duration;
	221	s32 temp;
	222
	223	tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
	224	mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
	225
3444682a	226	duration = tt->params.ct_kill_duration;
9ee718aa	227
a0a09243 LC	228	mutex_lock(&mvm->mutex);
	229
	230	if (__iwl_mvm_mac_start(mvm))
	231	goto reschedule;
	232
576eeee9	233	/* make sure the device is available for direct read/writes */
a0a09243 LC	234	if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) {
a0a09243 LC	235	__iwl_mvm_mac_stop(mvm);
576eeee9	236	goto reschedule;
a0a09243	237	}
576eeee9	238
a0a09243	239	temp = iwl_mvm_get_temp(mvm);
9ee718aa	240
576eeee9 EP	241	iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL);
576eeee9 EP	242
a0a09243 LC	243	__iwl_mvm_mac_stop(mvm);
	244
	245	if (temp < 0)
9ee718aa	246	goto reschedule;
a0a09243	247
9ee718aa EL	248	IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
9ee718aa EL	249
3444682a	250	if (temp <= tt->params.ct_kill_exit) {
a0a09243	251	mutex_unlock(&mvm->mutex);
9ee718aa EL	252	iwl_mvm_exit_ctkill(mvm);
	253	return;
	254	}
	255
	256	reschedule:
a0a09243	257	mutex_unlock(&mvm->mutex);
9ee718aa EL	258	schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
	259	round_jiffies(duration * HZ));
	260	}
	261
	262	static void iwl_mvm_tt_smps_iterator(void _data, u8 mac,
	263	struct ieee80211_vif *vif)
	264	{
	265	struct iwl_mvm *mvm = _data;
	266	enum ieee80211_smps_mode smps_mode;
	267
	268	lockdep_assert_held(&mvm->mutex);
	269
	270	if (mvm->thermal_throttle.dynamic_smps)
	271	smps_mode = IEEE80211_SMPS_DYNAMIC;
	272	else
	273	smps_mode = IEEE80211_SMPS_AUTOMATIC;
	274
fded313e EL	275	if (vif->type != NL80211_IFTYPE_STATION)
	276	return;
	277
9ee718aa EL	278	iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode);
	279	}
	280
	281	static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
	282	{
	283	struct ieee80211_sta *sta;
	284	struct iwl_mvm_sta *mvmsta;
	285	int i, err;
	286
	287	for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
	288	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
	289	lockdep_is_held(&mvm->mutex));
	290	if (IS_ERR_OR_NULL(sta))
	291	continue;
5b577a90	292	mvmsta = iwl_mvm_sta_from_mac80211(sta);
9ee718aa EL	293	if (enable == mvmsta->tt_tx_protection)
9ee718aa EL	294	continue;
e126b5d9	295	err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
9ee718aa EL	296	if (err) {
	297	IWL_ERR(mvm, "Failed to %s Tx protection\n",
	298	enable ? "enable" : "disable");
	299	} else {
	300	IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
	301	enable ? "Enable" : "Disable");
	302	mvmsta->tt_tx_protection = enable;
	303	}
	304	}
	305	}
	306
0c0e2c71	307	void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
9ee718aa EL	308	{
	309	struct iwl_host_cmd cmd = {
	310	.id = REPLY_THERMAL_MNG_BACKOFF,
	311	.len = { sizeof(u32), },
	312	.data = { &backoff, },
9ee718aa EL	313	};
9ee718aa EL	314
0c0e2c71 IY	315	backoff = max(backoff, mvm->thermal_throttle.min_backoff);
0c0e2c71 IY	316
9ee718aa EL	317	if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
	318	IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
	319	backoff);
	320	mvm->thermal_throttle.tx_backoff = backoff;
	321	} else {
	322	IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
	323	}
	324	}
	325
	326	void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
	327	{
3444682a	328	struct iwl_tt_params *params = &mvm->thermal_throttle.params;
9ee718aa EL	329	struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
9ee718aa EL	330	s32 temperature = mvm->temperature;
dafe6c43	331	bool throttle_enable = false;
9ee718aa EL	332	int i;
	333	u32 tx_backoff;
	334
	335	IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
	336
	337	if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
	338	iwl_mvm_enter_ctkill(mvm);
	339	return;
	340	}
	341
b689fa79	342	if (params->support_ct_kill &&
3444682a	343	temperature <= params->ct_kill_exit) {
b689fa79 LC	344	iwl_mvm_exit_ctkill(mvm);
	345	return;
	346	}
	347
9ee718aa EL	348	if (params->support_dynamic_smps) {
	349	if (!tt->dynamic_smps &&
	350	temperature >= params->dynamic_smps_entry) {
	351	IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
	352	tt->dynamic_smps = true;
	353	ieee80211_iterate_active_interfaces_atomic(
	354	mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
	355	iwl_mvm_tt_smps_iterator, mvm);
dafe6c43	356	throttle_enable = true;
9ee718aa EL	357	} else if (tt->dynamic_smps &&
	358	temperature <= params->dynamic_smps_exit) {
	359	IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
	360	tt->dynamic_smps = false;
	361	ieee80211_iterate_active_interfaces_atomic(
	362	mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
	363	iwl_mvm_tt_smps_iterator, mvm);
	364	}
	365	}
	366
	367	if (params->support_tx_protection) {
dafe6c43	368	if (temperature >= params->tx_protection_entry) {
9ee718aa	369	iwl_mvm_tt_tx_protection(mvm, true);
dafe6c43	370	throttle_enable = true;
dafe6c43	371	} else if (temperature <= params->tx_protection_exit) {
9ee718aa	372	iwl_mvm_tt_tx_protection(mvm, false);
dafe6c43	373	}
9ee718aa EL	374	}
	375
	376	if (params->support_tx_backoff) {
1b8ebbd3	377	tx_backoff = tt->min_backoff;
9ee718aa EL	378	for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
	379	if (temperature < params->tx_backoff[i].temperature)
	380	break;
1b8ebbd3 EL	381	tx_backoff = max(tt->min_backoff,
1b8ebbd3 EL	382	params->tx_backoff[i].backoff);
9ee718aa	383	}
1b8ebbd3	384	if (tx_backoff != tt->min_backoff)
dafe6c43	385	throttle_enable = true;
9ee718aa EL	386	if (tt->tx_backoff != tx_backoff)
	387	iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
	388	}
dafe6c43	389
	390	if (!tt->throttle && throttle_enable) {
	391	IWL_WARN(mvm,
	392	"Due to high temperature thermal throttling initiated\n");
	393	tt->throttle = true;
19a04bdd EL	394	} else if (tt->throttle && !tt->dynamic_smps &&
19a04bdd EL	395	tt->tx_backoff == tt->min_backoff &&
dafe6c43	396	temperature <= params->tx_protection_exit) {
	397	IWL_WARN(mvm,
	398	"Temperature is back to normal thermal throttling stopped\n");
	399	tt->throttle = false;
	400	}
9ee718aa EL	401	}
9ee718aa EL	402
3444682a	403	static const struct iwl_tt_params iwl_mvm_default_tt_params = {
9ee718aa EL	404	.ct_kill_entry = 118,
	405	.ct_kill_exit = 96,
	406	.ct_kill_duration = 5,
	407	.dynamic_smps_entry = 114,
	408	.dynamic_smps_exit = 110,
	409	.tx_protection_entry = 114,
	410	.tx_protection_exit = 108,
	411	.tx_backoff = {
	412	{.temperature = 112, .backoff = 200},
	413	{.temperature = 113, .backoff = 600},
	414	{.temperature = 114, .backoff = 1200},
	415	{.temperature = 115, .backoff = 2000},
	416	{.temperature = 116, .backoff = 4000},
	417	{.temperature = 117, .backoff = 10000},
	418	},
	419	.support_ct_kill = true,
	420	.support_dynamic_smps = true,
	421	.support_tx_protection = true,
	422	.support_tx_backoff = true,
	423	};
	424
0c0e2c71	425	void iwl_mvm_tt_initialize(struct iwl_mvm *mvm, u32 min_backoff)
9ee718aa EL	426	{
	427	struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
	428
	429	IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
6be497f2	430
3444682a CRI	431	if (mvm->cfg->thermal_params)
3444682a CRI	432	tt->params = *mvm->cfg->thermal_params;
6be497f2	433	else
3444682a	434	tt->params = iwl_mvm_default_tt_params;
6be497f2	435
dafe6c43	436	tt->throttle = false;
19789abb	437	tt->dynamic_smps = false;
0c0e2c71	438	tt->min_backoff = min_backoff;
9ee718aa EL	439	INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
	440	}
	441
	442	void iwl_mvm_tt_exit(struct iwl_mvm *mvm)
	443	{
	444	cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
	445	IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
	446	}