summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
blob: 4d907f60bce9f22ba0acf6169023aacd79f9bb75 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
/******************************************************************************
 *
 * 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
 * Copyright(c) 2015 - 2016 Intel Deutschland 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 <linuxwifi@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 - 2016 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 <linux/sort.h>

#include "mvm.h"

#define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT	HZ

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);

	if (!iwl_mvm_is_tt_in_fw(mvm)) {
		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_v1 *notif_v1;
	int len = iwl_rx_packet_payload_len(pkt);
	int temp;

	/* we can use notif_v1 only, because v2 only adds an additional
	 * parameter, which is not used in this function.
	*/
	if (WARN_ON_ONCE(len < sizeof(*notif_v1))) {
		IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
		return -EINVAL;
	}

	notif_v1 = (void *)pkt->data;

	temp = le32_to_cpu(notif_v1->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);
	struct iwl_dts_measurement_notif_v2 *notif_v2;
	int len = iwl_rx_packet_payload_len(pkt);
	int temp;
	u32 ths_crossed;

	/* 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 (!iwl_mvm_is_tt_in_fw(mvm)) {
		if (temp >= 0)
			iwl_mvm_tt_temp_changed(mvm, temp);
		return;
	}

	if (WARN_ON_ONCE(len < sizeof(*notif_v2))) {
		IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
		return;
	}

	notif_v2 = (void *)pkt->data;
	ths_crossed = le32_to_cpu(notif_v2->threshold_idx);

	/* 0xFF in ths_crossed means the notification is not related
	 * to a trip, so we can ignore it here.
	 */
	if (ths_crossed == 0xFF)
		return;

	IWL_DEBUG_TEMP(mvm, "Temp = %d Threshold crossed = %d\n",
		       temp, ths_crossed);

#ifdef CONFIG_THERMAL
	if (WARN_ON(ths_crossed >= IWL_MAX_DTS_TRIPS))
		return;

	if (mvm->tz_device.tzone) {
		struct iwl_mvm_thermal_device *tz_dev = &mvm->tz_device;

		thermal_notify_framework(tz_dev->tzone,
					 tz_dev->fw_trips_index[ths_crossed]);
	}
#endif /* CONFIG_THERMAL */
}

void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct ct_kill_notif *notif;
	int len = iwl_rx_packet_payload_len(pkt);

	if (WARN_ON_ONCE(len != sizeof(*notif))) {
		IWL_ERR(mvm, "Invalid CT_KILL_NOTIFICATION\n");
		return;
	}

	notif = (struct ct_kill_notif *)pkt->data;
	IWL_DEBUG_TEMP(mvm, "CT Kill notification temperature = %d\n",
		       notif->temperature);

	iwl_mvm_enter_ctkill(mvm);
}

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;

	cmdid = iwl_cmd_id(CMD_DTS_MEASUREMENT_TRIGGER_WIDE,
			   PHY_OPS_GROUP, 0);

	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, s32 *temp)
{
	struct iwl_notification_wait wait_temp_notif;
	static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
					    DTS_MEASUREMENT_NOTIF_WIDE) };
	int ret;

	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;
}

static void check_exit_ctkill(struct work_struct *work)
{
	struct iwl_mvm_tt_mgmt *tt;
	struct iwl_mvm *mvm;
	u32 duration;
	s32 temp;
	int ret;

	tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
	mvm = container_of(tt, struct iwl_mvm, thermal_throttle);

	if (iwl_mvm_is_tt_in_fw(mvm)) {
		iwl_mvm_exit_ctkill(mvm);

		return;
	}

	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;
	}

	ret = iwl_mvm_get_temp(mvm, &temp);

	iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL);

	__iwl_mvm_mac_stop(mvm);

	if (ret)
		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 iwl_mvm_sta *mvmsta;
	int i, err;

	for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
		mvmsta = iwl_mvm_sta_from_staid_protected(mvm, i);
		if (!mvmsta)
			continue;

		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,
};

/* budget in mWatt */
static const u32 iwl_mvm_cdev_budgets[] = {
	2000,	/* cooling state 0 */
	1800,	/* cooling state 1 */
	1600,	/* cooling state 2 */
	1400,	/* cooling state 3 */
	1200,	/* cooling state 4 */
	1000,	/* cooling state 5 */
	900,	/* cooling state 6 */
	800,	/* cooling state 7 */
	700,	/* cooling state 8 */
	650,	/* cooling state 9 */
	600,	/* cooling state 10 */
	550,	/* cooling state 11 */
	500,	/* cooling state 12 */
	450,	/* cooling state 13 */
	400,	/* cooling state 14 */
	350,	/* cooling state 15 */
	300,	/* cooling state 16 */
	250,	/* cooling state 17 */
	200,	/* cooling state 18 */
	150,	/* cooling state 19 */
};

int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 state)
{
	struct iwl_mvm_ctdp_cmd cmd = {
		.operation = cpu_to_le32(op),
		.budget = cpu_to_le32(iwl_mvm_cdev_budgets[state]),
		.window_size = 0,
	};
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

	status = 0;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
						       CTDP_CONFIG_CMD),
					  sizeof(cmd), &cmd, &status);

	if (ret) {
		IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
		return ret;
	}

	switch (op) {
	case CTDP_CMD_OPERATION_START:
#ifdef CONFIG_THERMAL
		mvm->cooling_dev.cur_state = state;
#endif /* CONFIG_THERMAL */
		break;
	case CTDP_CMD_OPERATION_REPORT:
		IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
		/* when the function is called with CTDP_CMD_OPERATION_REPORT
		 * option the function should return the average budget value
		 * that is received from the FW.
		 * The budget can't be less or equal to 0, so it's possible
		 * to distinguish between error values and budgets.
		 */
		return status;
	case CTDP_CMD_OPERATION_STOP:
		IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
		break;
	}

	return 0;
}

#ifdef CONFIG_THERMAL
static int compare_temps(const void *a, const void *b)
{
	return ((s16)le16_to_cpu(*(__le16 *)a) -
		(s16)le16_to_cpu(*(__le16 *)b));
}

int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
{
	struct temp_report_ths_cmd cmd = {0};
	int ret, i, j, idx = 0;

	lockdep_assert_held(&mvm->mutex);

	if (!mvm->tz_device.tzone)
		return -EINVAL;

	/* The driver holds array of temperature trips that are unsorted
	 * and uncompressed, the FW should get it compressed and sorted
	 */

	/* compress temp_trips to cmd array, remove uninitialized values*/
	for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
		if (mvm->tz_device.temp_trips[i] != S16_MIN) {
			cmd.thresholds[idx++] =
				cpu_to_le16(mvm->tz_device.temp_trips[i]);
		}
	}
	cmd.num_temps = cpu_to_le32(idx);

	if (!idx)
		goto send;

	/*sort cmd array*/
	sort(cmd.thresholds, idx, sizeof(s16), compare_temps, NULL);

	/* we should save the indexes of trips because we sort
	 * and compress the orginal array
	 */
	for (i = 0; i < idx; i++) {
		for (j = 0; j < IWL_MAX_DTS_TRIPS; j++) {
			if (le16_to_cpu(cmd.thresholds[i]) ==
				mvm->tz_device.temp_trips[j])
				mvm->tz_device.fw_trips_index[i] = j;
		}
	}

send:
	ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,
						TEMP_REPORTING_THRESHOLDS_CMD),
				   0, sizeof(cmd), &cmd);
	if (ret)
		IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
			ret);

	return ret;
}

static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
				  int *temperature)
{
	struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
	int ret;
	int temp;

	mutex_lock(&mvm->mutex);

	if (!iwl_mvm_firmware_running(mvm) ||
	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
		ret = -EIO;
		goto out;
	}

	ret = iwl_mvm_get_temp(mvm, &temp);
	if (ret)
		goto out;

	*temperature = temp * 1000;

out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

static int iwl_mvm_tzone_get_trip_temp(struct thermal_zone_device *device,
				       int trip, int *temp)
{
	struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;

	if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
		return -EINVAL;

	*temp = mvm->tz_device.temp_trips[trip] * 1000;

	return 0;
}

static int iwl_mvm_tzone_get_trip_type(struct thermal_zone_device *device,
				       int trip, enum thermal_trip_type *type)
{
	if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
		return -EINVAL;

	*type = THERMAL_TRIP_PASSIVE;

	return 0;
}

static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
				       int trip, int temp)
{
	struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
	struct iwl_mvm_thermal_device *tzone;
	int i, ret;
	s16 temperature;

	mutex_lock(&mvm->mutex);

	if (!iwl_mvm_firmware_running(mvm) ||
	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
		ret = -EIO;
		goto out;
	}

	if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS) {
		ret = -EINVAL;
		goto out;
	}

	if ((temp / 1000) > S16_MAX) {
		ret = -EINVAL;
		goto out;
	}

	temperature = (s16)(temp / 1000);
	tzone = &mvm->tz_device;

	if (!tzone) {
		ret = -EIO;
		goto out;
	}

	/* no updates*/
	if (tzone->temp_trips[trip] == temperature) {
		ret = 0;
		goto out;
	}

	/* already existing temperature */
	for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
		if (tzone->temp_trips[i] == temperature) {
			ret = -EINVAL;
			goto out;
		}
	}

	tzone->temp_trips[trip] = temperature;

	ret = iwl_mvm_send_temp_report_ths_cmd(mvm);
out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

static  struct thermal_zone_device_ops tzone_ops = {
	.get_temp = iwl_mvm_tzone_get_temp,
	.get_trip_temp = iwl_mvm_tzone_get_trip_temp,
	.get_trip_type = iwl_mvm_tzone_get_trip_type,
	.set_trip_temp = iwl_mvm_tzone_set_trip_temp,
};

/* make all trips writable */
#define IWL_WRITABLE_TRIPS_MSK (BIT(IWL_MAX_DTS_TRIPS) - 1)

static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
{
	int i;
	char name[] = "iwlwifi";

	if (!iwl_mvm_is_tt_in_fw(mvm)) {
		mvm->tz_device.tzone = NULL;

		return;
	}

	BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);

	mvm->tz_device.tzone = thermal_zone_device_register(name,
							IWL_MAX_DTS_TRIPS,
							IWL_WRITABLE_TRIPS_MSK,
							mvm, &tzone_ops,
							NULL, 0, 0);
	if (IS_ERR(mvm->tz_device.tzone)) {
		IWL_DEBUG_TEMP(mvm,
			       "Failed to register to thermal zone (err = %ld)\n",
			       PTR_ERR(mvm->tz_device.tzone));
		mvm->tz_device.tzone = NULL;
		return;
	}

	/* 0 is a valid temperature,
	 * so initialize the array with S16_MIN which invalid temperature
	 */
	for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++)
		mvm->tz_device.temp_trips[i] = S16_MIN;
}

static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
				       unsigned long *state)
{
	*state = ARRAY_SIZE(iwl_mvm_cdev_budgets) - 1;

	return 0;
}

static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev,
				       unsigned long *state)
{
	struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);

	*state = mvm->cooling_dev.cur_state;

	return 0;
}

static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
				       unsigned long new_state)
{
	struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
	int ret;

	mutex_lock(&mvm->mutex);

	if (!iwl_mvm_firmware_running(mvm) ||
	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
		ret = -EIO;
		goto unlock;
	}

	if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) {
		ret = -EINVAL;
		goto unlock;
	}

	ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
				   new_state);

unlock:
	mutex_unlock(&mvm->mutex);
	return ret;
}

static const struct thermal_cooling_device_ops tcooling_ops = {
	.get_max_state = iwl_mvm_tcool_get_max_state,
	.get_cur_state = iwl_mvm_tcool_get_cur_state,
	.set_cur_state = iwl_mvm_tcool_set_cur_state,
};

static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm)
{
	char name[] = "iwlwifi";

	if (!iwl_mvm_is_ctdp_supported(mvm))
		return;

	BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);

	mvm->cooling_dev.cdev =
		thermal_cooling_device_register(name,
						mvm,
						&tcooling_ops);

	if (IS_ERR(mvm->cooling_dev.cdev)) {
		IWL_DEBUG_TEMP(mvm,
			       "Failed to register to cooling device (err = %ld)\n",
			       PTR_ERR(mvm->cooling_dev.cdev));
		mvm->cooling_dev.cdev = NULL;
		return;
	}
}

static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm)
{
	if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone)
		return;

	IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n");
	if (mvm->tz_device.tzone) {
		thermal_zone_device_unregister(mvm->tz_device.tzone);
		mvm->tz_device.tzone = NULL;
	}
}

static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm)
{
	if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev)
		return;

	IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n");
	if (mvm->cooling_dev.cdev) {
		thermal_cooling_device_unregister(mvm->cooling_dev.cdev);
		mvm->cooling_dev.cdev = NULL;
	}
}
#endif /* CONFIG_THERMAL */

void iwl_mvm_thermal_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);

#ifdef CONFIG_THERMAL
	iwl_mvm_cooling_device_register(mvm);
	iwl_mvm_thermal_zone_register(mvm);
#endif
	mvm->init_status |= IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
}

void iwl_mvm_thermal_exit(struct iwl_mvm *mvm)
{
	if (!(mvm->init_status & IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE))
		return;

	cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
	IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");

#ifdef CONFIG_THERMAL
	iwl_mvm_cooling_device_unregister(mvm);
	iwl_mvm_thermal_zone_unregister(mvm);
#endif
	mvm->init_status &= ~IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
}