xref: /linux/drivers/net/wireless/intel/iwlwifi/mvm/coex.c (revision e9f0878c4b2004ac19581274c1ae4c61ae3ca70e)
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  *
8  * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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  *
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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  *
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26  * in the file called COPYING.
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29  *  Intel Linux Wireless <linuxwifi@intel.com>
30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31  *
32  * BSD LICENSE
33  *
34  * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
35  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63  *
64  *****************************************************************************/
65 
66 #include <linux/ieee80211.h>
67 #include <linux/etherdevice.h>
68 #include <net/mac80211.h>
69 
70 #include "fw/api/coex.h"
71 #include "iwl-modparams.h"
72 #include "mvm.h"
73 #include "iwl-debug.h"
74 
75 /* 20MHz / 40MHz below / 40Mhz above*/
76 static const __le64 iwl_ci_mask[][3] = {
77 	/* dummy entry for channel 0 */
78 	{cpu_to_le64(0), cpu_to_le64(0), cpu_to_le64(0)},
79 	{
80 		cpu_to_le64(0x0000001FFFULL),
81 		cpu_to_le64(0x0ULL),
82 		cpu_to_le64(0x00007FFFFFULL),
83 	},
84 	{
85 		cpu_to_le64(0x000000FFFFULL),
86 		cpu_to_le64(0x0ULL),
87 		cpu_to_le64(0x0003FFFFFFULL),
88 	},
89 	{
90 		cpu_to_le64(0x000003FFFCULL),
91 		cpu_to_le64(0x0ULL),
92 		cpu_to_le64(0x000FFFFFFCULL),
93 	},
94 	{
95 		cpu_to_le64(0x00001FFFE0ULL),
96 		cpu_to_le64(0x0ULL),
97 		cpu_to_le64(0x007FFFFFE0ULL),
98 	},
99 	{
100 		cpu_to_le64(0x00007FFF80ULL),
101 		cpu_to_le64(0x00007FFFFFULL),
102 		cpu_to_le64(0x01FFFFFF80ULL),
103 	},
104 	{
105 		cpu_to_le64(0x0003FFFC00ULL),
106 		cpu_to_le64(0x0003FFFFFFULL),
107 		cpu_to_le64(0x0FFFFFFC00ULL),
108 	},
109 	{
110 		cpu_to_le64(0x000FFFF000ULL),
111 		cpu_to_le64(0x000FFFFFFCULL),
112 		cpu_to_le64(0x3FFFFFF000ULL),
113 	},
114 	{
115 		cpu_to_le64(0x007FFF8000ULL),
116 		cpu_to_le64(0x007FFFFFE0ULL),
117 		cpu_to_le64(0xFFFFFF8000ULL),
118 	},
119 	{
120 		cpu_to_le64(0x01FFFE0000ULL),
121 		cpu_to_le64(0x01FFFFFF80ULL),
122 		cpu_to_le64(0xFFFFFE0000ULL),
123 	},
124 	{
125 		cpu_to_le64(0x0FFFF00000ULL),
126 		cpu_to_le64(0x0FFFFFFC00ULL),
127 		cpu_to_le64(0x0ULL),
128 	},
129 	{
130 		cpu_to_le64(0x3FFFC00000ULL),
131 		cpu_to_le64(0x3FFFFFF000ULL),
132 		cpu_to_le64(0x0)
133 	},
134 	{
135 		cpu_to_le64(0xFFFE000000ULL),
136 		cpu_to_le64(0xFFFFFF8000ULL),
137 		cpu_to_le64(0x0)
138 	},
139 	{
140 		cpu_to_le64(0xFFF8000000ULL),
141 		cpu_to_le64(0xFFFFFE0000ULL),
142 		cpu_to_le64(0x0)
143 	},
144 	{
145 		cpu_to_le64(0xFE00000000ULL),
146 		cpu_to_le64(0x0ULL),
147 		cpu_to_le64(0x0ULL)
148 	},
149 };
150 
151 static enum iwl_bt_coex_lut_type
152 iwl_get_coex_type(struct iwl_mvm *mvm, const struct ieee80211_vif *vif)
153 {
154 	struct ieee80211_chanctx_conf *chanctx_conf;
155 	enum iwl_bt_coex_lut_type ret;
156 	u16 phy_ctx_id;
157 	u32 primary_ch_phy_id, secondary_ch_phy_id;
158 
159 	/*
160 	 * Checking that we hold mvm->mutex is a good idea, but the rate
161 	 * control can't acquire the mutex since it runs in Tx path.
162 	 * So this is racy in that case, but in the worst case, the AMPDU
163 	 * size limit will be wrong for a short time which is not a big
164 	 * issue.
165 	 */
166 
167 	rcu_read_lock();
168 
169 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
170 
171 	if (!chanctx_conf ||
172 	     chanctx_conf->def.chan->band != NL80211_BAND_2GHZ) {
173 		rcu_read_unlock();
174 		return BT_COEX_INVALID_LUT;
175 	}
176 
177 	ret = BT_COEX_TX_DIS_LUT;
178 
179 	if (mvm->cfg->bt_shared_single_ant) {
180 		rcu_read_unlock();
181 		return ret;
182 	}
183 
184 	phy_ctx_id = *((u16 *)chanctx_conf->drv_priv);
185 	primary_ch_phy_id = le32_to_cpu(mvm->last_bt_ci_cmd.primary_ch_phy_id);
186 	secondary_ch_phy_id =
187 		le32_to_cpu(mvm->last_bt_ci_cmd.secondary_ch_phy_id);
188 
189 	if (primary_ch_phy_id == phy_ctx_id)
190 		ret = le32_to_cpu(mvm->last_bt_notif.primary_ch_lut);
191 	else if (secondary_ch_phy_id == phy_ctx_id)
192 		ret = le32_to_cpu(mvm->last_bt_notif.secondary_ch_lut);
193 	/* else - default = TX TX disallowed */
194 
195 	rcu_read_unlock();
196 
197 	return ret;
198 }
199 
200 int iwl_mvm_send_bt_init_conf(struct iwl_mvm *mvm)
201 {
202 	struct iwl_bt_coex_cmd bt_cmd = {};
203 	u32 mode;
204 
205 	lockdep_assert_held(&mvm->mutex);
206 
207 	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS)) {
208 		switch (mvm->bt_force_ant_mode) {
209 		case BT_FORCE_ANT_BT:
210 			mode = BT_COEX_BT;
211 			break;
212 		case BT_FORCE_ANT_WIFI:
213 			mode = BT_COEX_WIFI;
214 			break;
215 		default:
216 			WARN_ON(1);
217 			mode = 0;
218 		}
219 
220 		bt_cmd.mode = cpu_to_le32(mode);
221 		goto send_cmd;
222 	}
223 
224 	mode = iwlwifi_mod_params.bt_coex_active ? BT_COEX_NW : BT_COEX_DISABLE;
225 	bt_cmd.mode = cpu_to_le32(mode);
226 
227 	if (IWL_MVM_BT_COEX_SYNC2SCO)
228 		bt_cmd.enabled_modules |=
229 			cpu_to_le32(BT_COEX_SYNC2SCO_ENABLED);
230 
231 	if (iwl_mvm_is_mplut_supported(mvm))
232 		bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_MPLUT_ENABLED);
233 
234 	bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_HIGH_BAND_RET);
235 
236 send_cmd:
237 	memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
238 	memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
239 
240 	return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, 0, sizeof(bt_cmd), &bt_cmd);
241 }
242 
243 static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
244 				       bool enable)
245 {
246 	struct iwl_bt_coex_reduced_txp_update_cmd cmd = {};
247 	struct iwl_mvm_sta *mvmsta;
248 	u32 value;
249 	int ret;
250 
251 	mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
252 	if (!mvmsta)
253 		return 0;
254 
255 	/* nothing to do */
256 	if (mvmsta->bt_reduced_txpower == enable)
257 		return 0;
258 
259 	value = mvmsta->sta_id;
260 
261 	if (enable)
262 		value |= BT_REDUCED_TX_POWER_BIT;
263 
264 	IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n",
265 		       enable ? "en" : "dis", sta_id);
266 
267 	cmd.reduced_txp = cpu_to_le32(value);
268 	mvmsta->bt_reduced_txpower = enable;
269 
270 	ret = iwl_mvm_send_cmd_pdu(mvm, BT_COEX_UPDATE_REDUCED_TXP, CMD_ASYNC,
271 				   sizeof(cmd), &cmd);
272 
273 	return ret;
274 }
275 
276 struct iwl_bt_iterator_data {
277 	struct iwl_bt_coex_profile_notif *notif;
278 	struct iwl_mvm *mvm;
279 	struct ieee80211_chanctx_conf *primary;
280 	struct ieee80211_chanctx_conf *secondary;
281 	bool primary_ll;
282 	u8 primary_load;
283 	u8 secondary_load;
284 };
285 
286 static inline
287 void iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm *mvm,
288 				       struct ieee80211_vif *vif,
289 				       bool enable, int rssi)
290 {
291 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
292 
293 	mvmvif->bf_data.last_bt_coex_event = rssi;
294 	mvmvif->bf_data.bt_coex_max_thold =
295 		enable ? -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH : 0;
296 	mvmvif->bf_data.bt_coex_min_thold =
297 		enable ? -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH : 0;
298 }
299 
300 #define MVM_COEX_TCM_PERIOD (HZ * 10)
301 
302 static void iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm *mvm,
303 					 struct iwl_bt_iterator_data *data)
304 {
305 	unsigned long now = jiffies;
306 
307 	if (!time_after(now, mvm->bt_coex_last_tcm_ts + MVM_COEX_TCM_PERIOD))
308 		return;
309 
310 	mvm->bt_coex_last_tcm_ts = now;
311 
312 	/* We assume here that we don't have more than 2 vifs on 2.4GHz */
313 
314 	/* if the primary is low latency, it will stay primary */
315 	if (data->primary_ll)
316 		return;
317 
318 	if (data->primary_load >= data->secondary_load)
319 		return;
320 
321 	swap(data->primary, data->secondary);
322 }
323 
324 /* must be called under rcu_read_lock */
325 static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac,
326 				      struct ieee80211_vif *vif)
327 {
328 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
329 	struct iwl_bt_iterator_data *data = _data;
330 	struct iwl_mvm *mvm = data->mvm;
331 	struct ieee80211_chanctx_conf *chanctx_conf;
332 	/* default smps_mode is AUTOMATIC - only used for client modes */
333 	enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
334 	u32 bt_activity_grading;
335 	int ave_rssi;
336 
337 	lockdep_assert_held(&mvm->mutex);
338 
339 	switch (vif->type) {
340 	case NL80211_IFTYPE_STATION:
341 		break;
342 	case NL80211_IFTYPE_AP:
343 		if (!mvmvif->ap_ibss_active)
344 			return;
345 		break;
346 	default:
347 		return;
348 	}
349 
350 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
351 
352 	/* If channel context is invalid or not on 2.4GHz .. */
353 	if ((!chanctx_conf ||
354 	     chanctx_conf->def.chan->band != NL80211_BAND_2GHZ)) {
355 		if (vif->type == NL80211_IFTYPE_STATION) {
356 			/* ... relax constraints and disable rssi events */
357 			iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
358 					    smps_mode);
359 			iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
360 						    false);
361 			iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
362 		}
363 		return;
364 	}
365 
366 	bt_activity_grading = le32_to_cpu(data->notif->bt_activity_grading);
367 	if (bt_activity_grading >= BT_HIGH_TRAFFIC)
368 		smps_mode = IEEE80211_SMPS_STATIC;
369 	else if (bt_activity_grading >= BT_LOW_TRAFFIC)
370 		smps_mode = IEEE80211_SMPS_DYNAMIC;
371 
372 	/* relax SMPS constraints for next association */
373 	if (!vif->bss_conf.assoc)
374 		smps_mode = IEEE80211_SMPS_AUTOMATIC;
375 
376 	if (mvmvif->phy_ctxt &&
377 	    (mvm->last_bt_notif.rrc_status & BIT(mvmvif->phy_ctxt->id)))
378 		smps_mode = IEEE80211_SMPS_AUTOMATIC;
379 
380 	IWL_DEBUG_COEX(data->mvm,
381 		       "mac %d: bt_activity_grading %d smps_req %d\n",
382 		       mvmvif->id, bt_activity_grading, smps_mode);
383 
384 	if (vif->type == NL80211_IFTYPE_STATION)
385 		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
386 				    smps_mode);
387 
388 	/* low latency is always primary */
389 	if (iwl_mvm_vif_low_latency(mvmvif)) {
390 		data->primary_ll = true;
391 
392 		data->secondary = data->primary;
393 		data->primary = chanctx_conf;
394 	}
395 
396 	if (vif->type == NL80211_IFTYPE_AP) {
397 		if (!mvmvif->ap_ibss_active)
398 			return;
399 
400 		if (chanctx_conf == data->primary)
401 			return;
402 
403 		if (!data->primary_ll) {
404 			/*
405 			 * downgrade the current primary no matter what its
406 			 * type is.
407 			 */
408 			data->secondary = data->primary;
409 			data->primary = chanctx_conf;
410 		} else {
411 			/* there is low latency vif - we will be secondary */
412 			data->secondary = chanctx_conf;
413 		}
414 
415 		if (data->primary == chanctx_conf)
416 			data->primary_load = mvm->tcm.result.load[mvmvif->id];
417 		else if (data->secondary == chanctx_conf)
418 			data->secondary_load = mvm->tcm.result.load[mvmvif->id];
419 		return;
420 	}
421 
422 	/*
423 	 * STA / P2P Client, try to be primary if first vif. If we are in low
424 	 * latency mode, we are already in primary and just don't do much
425 	 */
426 	if (!data->primary || data->primary == chanctx_conf)
427 		data->primary = chanctx_conf;
428 	else if (!data->secondary)
429 		/* if secondary is not NULL, it might be a GO */
430 		data->secondary = chanctx_conf;
431 
432 	if (data->primary == chanctx_conf)
433 		data->primary_load = mvm->tcm.result.load[mvmvif->id];
434 	else if (data->secondary == chanctx_conf)
435 		data->secondary_load = mvm->tcm.result.load[mvmvif->id];
436 	/*
437 	 * don't reduce the Tx power if one of these is true:
438 	 *  we are in LOOSE
439 	 *  single share antenna product
440 	 *  BT is inactive
441 	 *  we are not associated
442 	 */
443 	if (iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT ||
444 	    mvm->cfg->bt_shared_single_ant || !vif->bss_conf.assoc ||
445 	    le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF) {
446 		iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false);
447 		iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
448 		return;
449 	}
450 
451 	/* try to get the avg rssi from fw */
452 	ave_rssi = mvmvif->bf_data.ave_beacon_signal;
453 
454 	/* if the RSSI isn't valid, fake it is very low */
455 	if (!ave_rssi)
456 		ave_rssi = -100;
457 	if (ave_rssi > -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH) {
458 		if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true))
459 			IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
460 	} else if (ave_rssi < -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH) {
461 		if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
462 			IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
463 	}
464 
465 	/* Begin to monitor the RSSI: it may influence the reduced Tx power */
466 	iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, true, ave_rssi);
467 }
468 
469 static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
470 {
471 	struct iwl_bt_iterator_data data = {
472 		.mvm = mvm,
473 		.notif = &mvm->last_bt_notif,
474 	};
475 	struct iwl_bt_coex_ci_cmd cmd = {};
476 	u8 ci_bw_idx;
477 
478 	/* Ignore updates if we are in force mode */
479 	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
480 		return;
481 
482 	rcu_read_lock();
483 	ieee80211_iterate_active_interfaces_atomic(
484 					mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
485 					iwl_mvm_bt_notif_iterator, &data);
486 
487 	iwl_mvm_bt_coex_tcm_based_ci(mvm, &data);
488 
489 	if (data.primary) {
490 		struct ieee80211_chanctx_conf *chan = data.primary;
491 		if (WARN_ON(!chan->def.chan)) {
492 			rcu_read_unlock();
493 			return;
494 		}
495 
496 		if (chan->def.width < NL80211_CHAN_WIDTH_40) {
497 			ci_bw_idx = 0;
498 		} else {
499 			if (chan->def.center_freq1 >
500 			    chan->def.chan->center_freq)
501 				ci_bw_idx = 2;
502 			else
503 				ci_bw_idx = 1;
504 		}
505 
506 		cmd.bt_primary_ci =
507 			iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
508 		cmd.primary_ch_phy_id =
509 			cpu_to_le32(*((u16 *)data.primary->drv_priv));
510 	}
511 
512 	if (data.secondary) {
513 		struct ieee80211_chanctx_conf *chan = data.secondary;
514 		if (WARN_ON(!data.secondary->def.chan)) {
515 			rcu_read_unlock();
516 			return;
517 		}
518 
519 		if (chan->def.width < NL80211_CHAN_WIDTH_40) {
520 			ci_bw_idx = 0;
521 		} else {
522 			if (chan->def.center_freq1 >
523 			    chan->def.chan->center_freq)
524 				ci_bw_idx = 2;
525 			else
526 				ci_bw_idx = 1;
527 		}
528 
529 		cmd.bt_secondary_ci =
530 			iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
531 		cmd.secondary_ch_phy_id =
532 			cpu_to_le32(*((u16 *)data.secondary->drv_priv));
533 	}
534 
535 	rcu_read_unlock();
536 
537 	/* Don't spam the fw with the same command over and over */
538 	if (memcmp(&cmd, &mvm->last_bt_ci_cmd, sizeof(cmd))) {
539 		if (iwl_mvm_send_cmd_pdu(mvm, BT_COEX_CI, 0,
540 					 sizeof(cmd), &cmd))
541 			IWL_ERR(mvm, "Failed to send BT_CI cmd\n");
542 		memcpy(&mvm->last_bt_ci_cmd, &cmd, sizeof(cmd));
543 	}
544 }
545 
546 void iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
547 			      struct iwl_rx_cmd_buffer *rxb)
548 {
549 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
550 	struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data;
551 
552 	IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
553 	IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);
554 	IWL_DEBUG_COEX(mvm, "\tBT primary_ch_lut %d\n",
555 		       le32_to_cpu(notif->primary_ch_lut));
556 	IWL_DEBUG_COEX(mvm, "\tBT secondary_ch_lut %d\n",
557 		       le32_to_cpu(notif->secondary_ch_lut));
558 	IWL_DEBUG_COEX(mvm, "\tBT activity grading %d\n",
559 		       le32_to_cpu(notif->bt_activity_grading));
560 
561 	/* remember this notification for future use: rssi fluctuations */
562 	memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));
563 
564 	iwl_mvm_bt_coex_notif_handle(mvm);
565 }
566 
567 void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
568 			   enum ieee80211_rssi_event_data rssi_event)
569 {
570 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
571 	int ret;
572 
573 	lockdep_assert_held(&mvm->mutex);
574 
575 	/* Ignore updates if we are in force mode */
576 	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
577 		return;
578 
579 	/*
580 	 * Rssi update while not associated - can happen since the statistics
581 	 * are handled asynchronously
582 	 */
583 	if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA)
584 		return;
585 
586 	/* No BT - reports should be disabled */
587 	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF)
588 		return;
589 
590 	IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
591 		       rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");
592 
593 	/*
594 	 * Check if rssi is good enough for reduced Tx power, but not in loose
595 	 * scheme.
596 	 */
597 	if (rssi_event == RSSI_EVENT_LOW || mvm->cfg->bt_shared_single_ant ||
598 	    iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT)
599 		ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
600 						  false);
601 	else
602 		ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true);
603 
604 	if (ret)
605 		IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");
606 }
607 
608 #define LINK_QUAL_AGG_TIME_LIMIT_DEF	(4000)
609 #define LINK_QUAL_AGG_TIME_LIMIT_BT_ACT	(1200)
610 
611 u16 iwl_mvm_coex_agg_time_limit(struct iwl_mvm *mvm,
612 				struct ieee80211_sta *sta)
613 {
614 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
615 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
616 	struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
617 	enum iwl_bt_coex_lut_type lut_type;
618 
619 	if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
620 		return LINK_QUAL_AGG_TIME_LIMIT_DEF;
621 
622 	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
623 	    BT_HIGH_TRAFFIC)
624 		return LINK_QUAL_AGG_TIME_LIMIT_DEF;
625 
626 	lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
627 
628 	if (lut_type == BT_COEX_LOOSE_LUT || lut_type == BT_COEX_INVALID_LUT)
629 		return LINK_QUAL_AGG_TIME_LIMIT_DEF;
630 
631 	/* tight coex, high bt traffic, reduce AGG time limit */
632 	return LINK_QUAL_AGG_TIME_LIMIT_BT_ACT;
633 }
634 
635 bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
636 				     struct ieee80211_sta *sta)
637 {
638 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
639 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
640 	struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
641 	enum iwl_bt_coex_lut_type lut_type;
642 
643 	if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
644 		return true;
645 
646 	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
647 	    BT_HIGH_TRAFFIC)
648 		return true;
649 
650 	/*
651 	 * In Tight / TxTxDis, BT can't Rx while we Tx, so use both antennas
652 	 * since BT is already killed.
653 	 * In Loose, BT can Rx while we Tx, so forbid MIMO to let BT Rx while
654 	 * we Tx.
655 	 * When we are in 5GHz, we'll get BT_COEX_INVALID_LUT allowing MIMO.
656 	 */
657 	lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
658 	return lut_type != BT_COEX_LOOSE_LUT;
659 }
660 
661 bool iwl_mvm_bt_coex_is_ant_avail(struct iwl_mvm *mvm, u8 ant)
662 {
663 	/* there is no other antenna, shared antenna is always available */
664 	if (mvm->cfg->bt_shared_single_ant)
665 		return true;
666 
667 	if (ant & mvm->cfg->non_shared_ant)
668 		return true;
669 
670 	return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
671 		BT_HIGH_TRAFFIC;
672 }
673 
674 bool iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm *mvm)
675 {
676 	/* there is no other antenna, shared antenna is always available */
677 	if (mvm->cfg->bt_shared_single_ant)
678 		return true;
679 
680 	return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) < BT_HIGH_TRAFFIC;
681 }
682 
683 bool iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm *mvm,
684 				    enum nl80211_band band)
685 {
686 	u32 bt_activity = le32_to_cpu(mvm->last_bt_notif.bt_activity_grading);
687 
688 	if (band != NL80211_BAND_2GHZ)
689 		return false;
690 
691 	return bt_activity >= BT_LOW_TRAFFIC;
692 }
693 
694 u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
695 			   struct ieee80211_tx_info *info, u8 ac)
696 {
697 	__le16 fc = hdr->frame_control;
698 	bool mplut_enabled = iwl_mvm_is_mplut_supported(mvm);
699 
700 	if (info->band != NL80211_BAND_2GHZ)
701 		return 0;
702 
703 	if (unlikely(mvm->bt_tx_prio))
704 		return mvm->bt_tx_prio - 1;
705 
706 	if (likely(ieee80211_is_data(fc))) {
707 		if (likely(ieee80211_is_data_qos(fc))) {
708 			switch (ac) {
709 			case IEEE80211_AC_BE:
710 				return mplut_enabled ? 1 : 0;
711 			case IEEE80211_AC_VI:
712 				return mplut_enabled ? 2 : 3;
713 			case IEEE80211_AC_VO:
714 				return 3;
715 			default:
716 				return 0;
717 			}
718 		} else if (is_multicast_ether_addr(hdr->addr1)) {
719 			return 3;
720 		} else
721 			return 0;
722 	} else if (ieee80211_is_mgmt(fc)) {
723 		return ieee80211_is_disassoc(fc) ? 0 : 3;
724 	} else if (ieee80211_is_ctl(fc)) {
725 		/* ignore cfend and cfendack frames as we never send those */
726 		return 3;
727 	}
728 
729 	return 0;
730 }
731 
732 void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm)
733 {
734 	iwl_mvm_bt_coex_notif_handle(mvm);
735 }
736