summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/iwlwifi/mvm/bt-coex.c
blob: dbd622a3929ce47c0c91ca4a5d78b82c2c38eaca (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
/******************************************************************************
 *
 * 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 Intel Corporation. All rights reserved.
 *
 * 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) 2013 Intel Corporation. All rights reserved.
 * 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 <net/mac80211.h>

#include "fw-api-bt-coex.h"
#include "iwl-modparams.h"
#include "mvm.h"
#include "iwl-debug.h"

#define EVENT_PRIO_ANT(_evt, _prio, _shrd_ant)			\
	[(_evt)] = (((_prio) << BT_COEX_PRIO_TBL_PRIO_POS) |	\
		   ((_shrd_ant) << BT_COEX_PRIO_TBL_SHRD_ANT_POS))

static const u8 iwl_bt_prio_tbl[BT_COEX_PRIO_TBL_EVT_MAX] = {
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_INIT_CALIB1,
		       BT_COEX_PRIO_TBL_PRIO_BYPASS, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_INIT_CALIB2,
		       BT_COEX_PRIO_TBL_PRIO_BYPASS, 1),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_LOW1,
		       BT_COEX_PRIO_TBL_PRIO_LOW, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_LOW2,
		       BT_COEX_PRIO_TBL_PRIO_LOW, 1),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_HIGH1,
		       BT_COEX_PRIO_TBL_PRIO_HIGH, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_HIGH2,
		       BT_COEX_PRIO_TBL_PRIO_HIGH, 1),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_DTIM,
		       BT_COEX_PRIO_TBL_DISABLED, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_SCAN52,
		       BT_COEX_PRIO_TBL_PRIO_COEX_OFF, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_SCAN24,
		       BT_COEX_PRIO_TBL_PRIO_COEX_ON, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_IDLE,
		       BT_COEX_PRIO_TBL_PRIO_COEX_IDLE, 0),
	0, 0, 0, 0, 0, 0,
};

#undef EVENT_PRIO_ANT

/* BT Antenna Coupling Threshold (dB) */
#define IWL_BT_ANTENNA_COUPLING_THRESHOLD	(35)
#define IWL_BT_LOAD_FORCE_SISO_THRESHOLD	(3)

#define BT_ENABLE_REDUCED_TXPOWER_THRESHOLD	(-62)
#define BT_DISABLE_REDUCED_TXPOWER_THRESHOLD	(-65)
#define BT_REDUCED_TX_POWER_BIT			BIT(7)

static inline bool is_loose_coex(void)
{
	return iwlwifi_mod_params.ant_coupling >
		IWL_BT_ANTENNA_COUPLING_THRESHOLD;
}

int iwl_send_bt_prio_tbl(struct iwl_mvm *mvm)
{
	return iwl_mvm_send_cmd_pdu(mvm, BT_COEX_PRIO_TABLE, CMD_SYNC,
				    sizeof(struct iwl_bt_coex_prio_tbl_cmd),
				    &iwl_bt_prio_tbl);
}

static int iwl_send_bt_env(struct iwl_mvm *mvm, u8 action, u8 type)
{
	struct iwl_bt_coex_prot_env_cmd env_cmd;
	int ret;

	env_cmd.action = action;
	env_cmd.type = type;
	ret = iwl_mvm_send_cmd_pdu(mvm, BT_COEX_PROT_ENV, CMD_SYNC,
				   sizeof(env_cmd), &env_cmd);
	if (ret)
		IWL_ERR(mvm, "failed to send BT env command\n");
	return ret;
}

enum iwl_bt_kill_msk {
	BT_KILL_MSK_DEFAULT,
	BT_KILL_MSK_SCO_HID_A2DP,
	BT_KILL_MSK_REDUCED_TXPOW,
	BT_KILL_MSK_MAX,
};

static const u32 iwl_bt_ack_kill_msk[BT_KILL_MSK_MAX] = {
	[BT_KILL_MSK_DEFAULT] = 0xffff0000,
	[BT_KILL_MSK_SCO_HID_A2DP] = 0xffffffff,
	[BT_KILL_MSK_REDUCED_TXPOW] = 0,
};

static const u32 iwl_bt_cts_kill_msk[BT_KILL_MSK_MAX] = {
	[BT_KILL_MSK_DEFAULT] = 0xffff0000,
	[BT_KILL_MSK_SCO_HID_A2DP] = 0xffffffff,
	[BT_KILL_MSK_REDUCED_TXPOW] = 0,
};

#define IWL_BT_DEFAULT_BOOST (0xf0f0f0f0)

/* Tight Coex */
static const __le32 iwl_tight_lookup[BT_COEX_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaeaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xcc00ff28),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xcc00aaaa),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xc0004000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0xf0005000),
	cpu_to_le32(0xf0005000),
};

/* Loose Coex */
static const __le32 iwl_loose_lookup[BT_COEX_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xcc00ff28),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xcc00aaaa),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0xf0005000),
	cpu_to_le32(0xf0005000),
};

/* Full concurrency */
static const __le32 iwl_concurrent_lookup[BT_COEX_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
};

/* single shared antenna */
static const __le32 iwl_single_shared_ant_lookup[BT_COEX_LUT_SIZE] = {
	cpu_to_le32(0x40000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x44000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x40000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x44000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0xC0004000),
	cpu_to_le32(0xF0005000),
	cpu_to_le32(0xC0004000),
	cpu_to_le32(0xF0005000),
};

int iwl_send_bt_init_conf(struct iwl_mvm *mvm)
{
	struct iwl_bt_coex_cmd cmd = {
		.max_kill = 5,
		.bt3_time_t7_value = 1,
		.bt3_prio_sample_time = 2,
		.bt3_timer_t2_value = 0xc,
	};
	int ret;

	cmd.flags = iwlwifi_mod_params.bt_coex_active ?
			BT_COEX_NW : BT_COEX_DISABLE;
	cmd.flags |= BT_CH_PRIMARY_EN | BT_SYNC_2_BT_DISABLE;

	cmd.valid_bit_msk = cpu_to_le16(BT_VALID_ENABLE |
					BT_VALID_BT_PRIO_BOOST |
					BT_VALID_MAX_KILL |
					BT_VALID_3W_TMRS |
					BT_VALID_KILL_ACK |
					BT_VALID_KILL_CTS |
					BT_VALID_REDUCED_TX_POWER |
					BT_VALID_LUT);

	if (mvm->cfg->bt_shared_single_ant)
		memcpy(&cmd.decision_lut, iwl_single_shared_ant_lookup,
		       sizeof(iwl_single_shared_ant_lookup));
	else if (is_loose_coex())
		memcpy(&cmd.decision_lut, iwl_loose_lookup,
		       sizeof(iwl_tight_lookup));
	else
		memcpy(&cmd.decision_lut, iwl_tight_lookup,
		       sizeof(iwl_tight_lookup));

	cmd.bt_prio_boost = cpu_to_le32(IWL_BT_DEFAULT_BOOST);
	cmd.kill_ack_msk =
		cpu_to_le32(iwl_bt_ack_kill_msk[BT_KILL_MSK_DEFAULT]);
	cmd.kill_cts_msk =
		cpu_to_le32(iwl_bt_cts_kill_msk[BT_KILL_MSK_DEFAULT]);

	memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));

	/* go to CALIB state in internal BT-Coex state machine */
	ret = iwl_send_bt_env(mvm, BT_COEX_ENV_OPEN,
			      BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
	if (ret)
		return ret;

	ret  = iwl_send_bt_env(mvm, BT_COEX_ENV_CLOSE,
			       BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
	if (ret)
		return ret;

	return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, CMD_SYNC,
				    sizeof(cmd), &cmd);
}

static int iwl_mvm_bt_udpate_ctrl_kill_msk(struct iwl_mvm *mvm,
					   bool reduced_tx_power)
{
	enum iwl_bt_kill_msk bt_kill_msk;
	struct iwl_bt_coex_cmd cmd = {};
	struct iwl_bt_coex_profile_notif *notif = &mvm->last_bt_notif;

	lockdep_assert_held(&mvm->mutex);

	if (reduced_tx_power) {
		/* Reduced Tx power has precedence on the type of the profile */
		bt_kill_msk = BT_KILL_MSK_REDUCED_TXPOW;
	} else {
		/* Low latency BT profile is active: give higher prio to BT */
		if (BT_MBOX_MSG(notif, 3, SCO_STATE)  ||
		    BT_MBOX_MSG(notif, 3, A2DP_STATE) ||
		    BT_MBOX_MSG(notif, 3, SNIFF_STATE))
			bt_kill_msk = BT_KILL_MSK_SCO_HID_A2DP;
		else
			bt_kill_msk = BT_KILL_MSK_DEFAULT;
	}

	IWL_DEBUG_COEX(mvm,
		       "Update kill_msk: %d - SCO %sactive A2DP %sactive SNIFF %sactive\n",
		       bt_kill_msk,
		       BT_MBOX_MSG(notif, 3, SCO_STATE) ? "" : "in",
		       BT_MBOX_MSG(notif, 3, A2DP_STATE) ? "" : "in",
		       BT_MBOX_MSG(notif, 3, SNIFF_STATE) ? "" : "in");

	/* Don't send HCMD if there is no update */
	if (bt_kill_msk == mvm->bt_kill_msk)
		return 0;

	mvm->bt_kill_msk = bt_kill_msk;
	cmd.kill_ack_msk = cpu_to_le32(iwl_bt_ack_kill_msk[bt_kill_msk]);
	cmd.kill_cts_msk = cpu_to_le32(iwl_bt_cts_kill_msk[bt_kill_msk]);
	cmd.valid_bit_msk = cpu_to_le16(BT_VALID_KILL_ACK | BT_VALID_KILL_CTS);

	IWL_DEBUG_COEX(mvm, "bt_kill_msk = %d\n", bt_kill_msk);
	return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, CMD_SYNC,
				    sizeof(cmd), &cmd);
}

static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
				       bool enable)
{
	struct iwl_bt_coex_cmd cmd = {
		.valid_bit_msk = cpu_to_le16(BT_VALID_REDUCED_TX_POWER),
		.bt_reduced_tx_power = sta_id,
	};
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;

	/* This can happen if the station has been removed right now */
	if (sta_id == IWL_MVM_STATION_COUNT)
		return 0;

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));
	mvmsta = (void *)sta->drv_priv;

	/* nothing to do */
	if (mvmsta->bt_reduced_txpower == enable)
		return 0;

	if (enable)
		cmd.bt_reduced_tx_power |= BT_REDUCED_TX_POWER_BIT;

	IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n",
		       enable ? "en" : "dis", sta_id);

	mvmsta->bt_reduced_txpower = enable;

	/* Send ASYNC since this can be sent from an atomic context */
	return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, CMD_ASYNC,
				    sizeof(cmd), &cmd);
}

struct iwl_bt_iterator_data {
	struct iwl_bt_coex_profile_notif *notif;
	struct iwl_mvm *mvm;
	u32 num_bss_ifaces;
	bool reduced_tx_power;
};

static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac,
				      struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_bt_iterator_data *data = _data;
	struct iwl_mvm *mvm = data->mvm;
	struct ieee80211_chanctx_conf *chanctx_conf;
	enum ieee80211_smps_mode smps_mode;
	enum ieee80211_band band;
	int ave_rssi;

	lockdep_assert_held(&mvm->mutex);
	if (vif->type != NL80211_IFTYPE_STATION)
		return;

	rcu_read_lock();
	chanctx_conf = rcu_dereference(vif->chanctx_conf);
	if (chanctx_conf && chanctx_conf->def.chan)
		band = chanctx_conf->def.chan->band;
	else
		band = -1;
	rcu_read_unlock();

	smps_mode = IEEE80211_SMPS_AUTOMATIC;

	if (band != IEEE80211_BAND_2GHZ) {
		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
				    smps_mode);
		return;
	}

	if (data->notif->bt_status)
		smps_mode = IEEE80211_SMPS_DYNAMIC;

	if (data->notif->bt_traffic_load >= IWL_BT_LOAD_FORCE_SISO_THRESHOLD)
		smps_mode = IEEE80211_SMPS_STATIC;

	IWL_DEBUG_COEX(data->mvm,
		       "mac %d: bt_status %d traffic_load %d smps_req %d\n",
		       mvmvif->id,  data->notif->bt_status,
		       data->notif->bt_traffic_load, smps_mode);

	iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX, smps_mode);

	/* don't reduce the Tx power if in loose scheme */
	if (is_loose_coex())
		return;

	data->num_bss_ifaces++;

	/* reduced Txpower only if there are open BT connections, so ...*/
	if (!BT_MBOX_MSG(data->notif, 3, OPEN_CON_2)) {
		/* ... cancel reduced Tx power ... */
		if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
			IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
		data->reduced_tx_power = false;

		/* ... and there is no need to get reports on RSSI any more. */
		ieee80211_disable_rssi_reports(vif);
		return;
	}

	ave_rssi = ieee80211_ave_rssi(vif);

	/* if the RSSI isn't valid, fake it is very low */
	if (!ave_rssi)
		ave_rssi = -100;
	if (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) {
		if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true))
			IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");

		/*
		 * bt_kill_msk can be BT_KILL_MSK_REDUCED_TXPOW only if all the
		 * BSS / P2P clients have rssi above threshold.
		 * We set the bt_kill_msk to BT_KILL_MSK_REDUCED_TXPOW before
		 * the iteration, if one interface's rssi isn't good enough,
		 * bt_kill_msk will be set to default values.
		 */
	} else if (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) {
		if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
			IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");

		/*
		 * One interface hasn't rssi above threshold, bt_kill_msk must
		 * be set to default values.
		 */
		data->reduced_tx_power = false;
	}

	/* Begin to monitor the RSSI: it may influence the reduced Tx power */
	ieee80211_enable_rssi_reports(vif, BT_DISABLE_REDUCED_TXPOWER_THRESHOLD,
				      BT_ENABLE_REDUCED_TXPOWER_THRESHOLD);
}

static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
{
	struct iwl_bt_iterator_data data = {
		.mvm = mvm,
		.notif = &mvm->last_bt_notif,
		.reduced_tx_power = true,
	};

	ieee80211_iterate_active_interfaces_atomic(
					mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
					iwl_mvm_bt_notif_iterator, &data);

	/*
	 * If there are no BSS / P2P client interfaces, reduced Tx Power is
	 * irrelevant since it is based on the RSSI coming from the beacon.
	 * Use BT_KILL_MSK_DEFAULT in that case.
	 */
	data.reduced_tx_power = data.reduced_tx_power && data.num_bss_ifaces;

	if (iwl_mvm_bt_udpate_ctrl_kill_msk(mvm, data.reduced_tx_power))
		IWL_ERR(mvm, "Failed to update the ctrl_kill_msk\n");
}

/* upon association, the fw will send in BT Coex notification */
int iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
			     struct iwl_rx_cmd_buffer *rxb,
			     struct iwl_device_cmd *dev_cmd)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data;


	IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
	IWL_DEBUG_COEX(mvm, "\tBT %salive\n", notif->bt_status ? "" : "not ");
	IWL_DEBUG_COEX(mvm, "\tBT open conn %d\n", notif->bt_open_conn);
	IWL_DEBUG_COEX(mvm, "\tBT traffic load %d\n", notif->bt_traffic_load);
	IWL_DEBUG_COEX(mvm, "\tBT agg traffic load %d\n",
		       notif->bt_agg_traffic_load);
	IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);

	/* remember this notification for future use: rssi fluctuations */
	memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));

	iwl_mvm_bt_coex_notif_handle(mvm);

	/*
	 * This is an async handler for a notification, returning anything other
	 * than 0 doesn't make sense even if HCMD failed.
	 */
	return 0;
}

static void iwl_mvm_bt_rssi_iterator(void *_data, u8 *mac,
				   struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
	struct iwl_bt_iterator_data *data = _data;
	struct iwl_mvm *mvm = data->mvm;

	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;

	if (vif->type != NL80211_IFTYPE_STATION ||
	    mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
		return;

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
					lockdep_is_held(&mvm->mutex));
	mvmsta = (void *)sta->drv_priv;

	/*
	 * This interface doesn't support reduced Tx power (because of low
	 * RSSI probably), then set bt_kill_msk to default values.
	 */
	if (!mvmsta->bt_reduced_txpower)
		data->reduced_tx_power = false;
	/* else - possibly leave it to BT_KILL_MSK_REDUCED_TXPOW */
}

void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			   enum ieee80211_rssi_event rssi_event)
{
	struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
	struct iwl_bt_iterator_data data = {
		.mvm = mvm,
		.reduced_tx_power = true,
	};
	int ret;

	mutex_lock(&mvm->mutex);

	/* Rssi update while not associated ?! */
	if (WARN_ON_ONCE(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
		goto out_unlock;

	/* No open connection - reports should be disabled */
	if (!BT_MBOX_MSG(&mvm->last_bt_notif, 3, OPEN_CON_2))
		goto out_unlock;

	IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
		       rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");

	/*
	 * Check if rssi is good enough for reduced Tx power, but not in loose
	 * scheme.
	 */
	if (rssi_event == RSSI_EVENT_LOW || is_loose_coex())
		ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
						  false);
	else
		ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true);

	if (ret)
		IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");

	ieee80211_iterate_active_interfaces_atomic(
		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
		iwl_mvm_bt_rssi_iterator, &data);

	/*
	 * If there are no BSS / P2P client interfaces, reduced Tx Power is
	 * irrelevant since it is based on the RSSI coming from the beacon.
	 * Use BT_KILL_MSK_DEFAULT in that case.
	 */
	data.reduced_tx_power = data.reduced_tx_power && data.num_bss_ifaces;

	if (iwl_mvm_bt_udpate_ctrl_kill_msk(mvm, data.reduced_tx_power))
		IWL_ERR(mvm, "Failed to update the ctrl_kill_msk\n");

 out_unlock:
	mutex_unlock(&mvm->mutex);
}

void iwl_mvm_bt_coex_vif_assoc(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct ieee80211_chanctx_conf *chanctx_conf;
	enum ieee80211_band band;

	rcu_read_lock();
	chanctx_conf = rcu_dereference(vif->chanctx_conf);
	if (chanctx_conf && chanctx_conf->def.chan)
		band = chanctx_conf->def.chan->band;
	else
		band = -1;
	rcu_read_unlock();

	/* if we are in 2GHz we will get a notification from the fw */
	if (band == IEEE80211_BAND_2GHZ)
		return;

	/* else, we can remove all the constraints */
	memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));

	iwl_mvm_bt_coex_notif_handle(mvm);
}