1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2013-2014, 2018-2020, 2022-2024 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 */
6 #include <linux/ieee80211.h>
7 #include <linux/etherdevice.h>
8 #include <net/mac80211.h>
9
10 #include "fw/api/coex.h"
11 #include "iwl-modparams.h"
12 #include "mvm.h"
13 #include "iwl-debug.h"
14
15 /* 20MHz / 40MHz below / 40Mhz above*/
16 static const __le64 iwl_ci_mask[][3] = {
17 /* dummy entry for channel 0 */
18 {cpu_to_le64(0), cpu_to_le64(0), cpu_to_le64(0)},
19 {
20 cpu_to_le64(0x0000001FFFULL),
21 cpu_to_le64(0x0ULL),
22 cpu_to_le64(0x00007FFFFFULL),
23 },
24 {
25 cpu_to_le64(0x000000FFFFULL),
26 cpu_to_le64(0x0ULL),
27 cpu_to_le64(0x0003FFFFFFULL),
28 },
29 {
30 cpu_to_le64(0x000003FFFCULL),
31 cpu_to_le64(0x0ULL),
32 cpu_to_le64(0x000FFFFFFCULL),
33 },
34 {
35 cpu_to_le64(0x00001FFFE0ULL),
36 cpu_to_le64(0x0ULL),
37 cpu_to_le64(0x007FFFFFE0ULL),
38 },
39 {
40 cpu_to_le64(0x00007FFF80ULL),
41 cpu_to_le64(0x00007FFFFFULL),
42 cpu_to_le64(0x01FFFFFF80ULL),
43 },
44 {
45 cpu_to_le64(0x0003FFFC00ULL),
46 cpu_to_le64(0x0003FFFFFFULL),
47 cpu_to_le64(0x0FFFFFFC00ULL),
48 },
49 {
50 cpu_to_le64(0x000FFFF000ULL),
51 cpu_to_le64(0x000FFFFFFCULL),
52 cpu_to_le64(0x3FFFFFF000ULL),
53 },
54 {
55 cpu_to_le64(0x007FFF8000ULL),
56 cpu_to_le64(0x007FFFFFE0ULL),
57 cpu_to_le64(0xFFFFFF8000ULL),
58 },
59 {
60 cpu_to_le64(0x01FFFE0000ULL),
61 cpu_to_le64(0x01FFFFFF80ULL),
62 cpu_to_le64(0xFFFFFE0000ULL),
63 },
64 {
65 cpu_to_le64(0x0FFFF00000ULL),
66 cpu_to_le64(0x0FFFFFFC00ULL),
67 cpu_to_le64(0x0ULL),
68 },
69 {
70 cpu_to_le64(0x3FFFC00000ULL),
71 cpu_to_le64(0x3FFFFFF000ULL),
72 cpu_to_le64(0x0)
73 },
74 {
75 cpu_to_le64(0xFFFE000000ULL),
76 cpu_to_le64(0xFFFFFF8000ULL),
77 cpu_to_le64(0x0)
78 },
79 {
80 cpu_to_le64(0xFFF8000000ULL),
81 cpu_to_le64(0xFFFFFE0000ULL),
82 cpu_to_le64(0x0)
83 },
84 {
85 cpu_to_le64(0xFE00000000ULL),
86 cpu_to_le64(0x0ULL),
87 cpu_to_le64(0x0ULL)
88 },
89 };
90
91 static enum iwl_bt_coex_lut_type
iwl_get_coex_type(struct iwl_mvm * mvm,const struct ieee80211_vif * vif)92 iwl_get_coex_type(struct iwl_mvm *mvm, const struct ieee80211_vif *vif)
93 {
94 struct ieee80211_chanctx_conf *chanctx_conf;
95 enum iwl_bt_coex_lut_type ret;
96 u16 phy_ctx_id;
97 u32 primary_ch_phy_id, secondary_ch_phy_id;
98
99 /*
100 * Checking that we hold mvm->mutex is a good idea, but the rate
101 * control can't acquire the mutex since it runs in Tx path.
102 * So this is racy in that case, but in the worst case, the AMPDU
103 * size limit will be wrong for a short time which is not a big
104 * issue.
105 */
106
107 rcu_read_lock();
108
109 chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);
110
111 if (!chanctx_conf ||
112 chanctx_conf->def.chan->band != NL80211_BAND_2GHZ) {
113 rcu_read_unlock();
114 return BT_COEX_INVALID_LUT;
115 }
116
117 ret = BT_COEX_TX_DIS_LUT;
118
119 phy_ctx_id = *((u16 *)chanctx_conf->drv_priv);
120 primary_ch_phy_id = le32_to_cpu(mvm->last_bt_ci_cmd.primary_ch_phy_id);
121 secondary_ch_phy_id =
122 le32_to_cpu(mvm->last_bt_ci_cmd.secondary_ch_phy_id);
123
124 if (primary_ch_phy_id == phy_ctx_id)
125 ret = le32_to_cpu(mvm->last_bt_notif.primary_ch_lut);
126 else if (secondary_ch_phy_id == phy_ctx_id)
127 ret = le32_to_cpu(mvm->last_bt_notif.secondary_ch_lut);
128 /* else - default = TX TX disallowed */
129
130 rcu_read_unlock();
131
132 return ret;
133 }
134
iwl_mvm_send_bt_init_conf(struct iwl_mvm * mvm)135 int iwl_mvm_send_bt_init_conf(struct iwl_mvm *mvm)
136 {
137 struct iwl_bt_coex_cmd bt_cmd = {};
138 u32 mode;
139
140 lockdep_assert_held(&mvm->mutex);
141
142 if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS)) {
143 switch (mvm->bt_force_ant_mode) {
144 case BT_FORCE_ANT_BT:
145 mode = BT_COEX_BT;
146 break;
147 case BT_FORCE_ANT_WIFI:
148 mode = BT_COEX_WIFI;
149 break;
150 default:
151 WARN_ON(1);
152 mode = 0;
153 }
154
155 bt_cmd.mode = cpu_to_le32(mode);
156 goto send_cmd;
157 }
158
159 bt_cmd.mode = cpu_to_le32(BT_COEX_NW);
160
161 if (IWL_MVM_BT_COEX_SYNC2SCO)
162 bt_cmd.enabled_modules |=
163 cpu_to_le32(BT_COEX_SYNC2SCO_ENABLED);
164
165 if (iwl_mvm_is_mplut_supported(mvm))
166 bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_MPLUT_ENABLED);
167
168 bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_HIGH_BAND_RET);
169
170 send_cmd:
171 memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
172 memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
173
174 return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, 0, sizeof(bt_cmd), &bt_cmd);
175 }
176
iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm * mvm,u8 sta_id,bool enable)177 static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
178 bool enable)
179 {
180 struct iwl_bt_coex_reduced_txp_update_cmd cmd = {};
181 struct iwl_mvm_sta *mvmsta;
182 u32 value;
183
184 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
185 return 0;
186
187 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
188 if (!mvmsta)
189 return 0;
190
191 /* nothing to do */
192 if (mvmsta->bt_reduced_txpower == enable)
193 return 0;
194
195 value = mvmsta->deflink.sta_id;
196
197 if (enable)
198 value |= BT_REDUCED_TX_POWER_BIT;
199
200 IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n",
201 enable ? "en" : "dis", sta_id);
202
203 cmd.reduced_txp = cpu_to_le32(value);
204 mvmsta->bt_reduced_txpower = enable;
205
206 return iwl_mvm_send_cmd_pdu(mvm, BT_COEX_UPDATE_REDUCED_TXP,
207 CMD_ASYNC, sizeof(cmd), &cmd);
208 }
209
210 struct iwl_bt_iterator_data {
211 struct iwl_bt_coex_profile_notif *notif;
212 struct iwl_mvm *mvm;
213 struct ieee80211_chanctx_conf *primary;
214 struct ieee80211_chanctx_conf *secondary;
215 bool primary_ll;
216 u8 primary_load;
217 u8 secondary_load;
218 };
219
220 static inline
iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm * mvm,struct iwl_mvm_vif_link_info * link_info,bool enable,int rssi)221 void iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm *mvm,
222 struct iwl_mvm_vif_link_info *link_info,
223 bool enable, int rssi)
224 {
225 link_info->bf_data.last_bt_coex_event = rssi;
226 link_info->bf_data.bt_coex_max_thold =
227 enable ? -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH : 0;
228 link_info->bf_data.bt_coex_min_thold =
229 enable ? -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH : 0;
230 }
231
232 #define MVM_COEX_TCM_PERIOD (HZ * 10)
233
iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm * mvm,struct iwl_bt_iterator_data * data)234 static void iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm *mvm,
235 struct iwl_bt_iterator_data *data)
236 {
237 unsigned long now = jiffies;
238
239 if (!time_after(now, mvm->bt_coex_last_tcm_ts + MVM_COEX_TCM_PERIOD))
240 return;
241
242 mvm->bt_coex_last_tcm_ts = now;
243
244 /* We assume here that we don't have more than 2 vifs on 2.4GHz */
245
246 /* if the primary is low latency, it will stay primary */
247 if (data->primary_ll)
248 return;
249
250 if (data->primary_load >= data->secondary_load)
251 return;
252
253 swap(data->primary, data->secondary);
254 }
255
256 /*
257 * This function receives the LB link id and checks if eSR should be
258 * enabled or disabled (due to BT coex)
259 */
260 bool
iwl_mvm_bt_coex_calculate_esr_mode(struct iwl_mvm * mvm,struct ieee80211_vif * vif,s32 link_rssi,bool primary)261 iwl_mvm_bt_coex_calculate_esr_mode(struct iwl_mvm *mvm,
262 struct ieee80211_vif *vif,
263 s32 link_rssi,
264 bool primary)
265 {
266 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
267 bool have_wifi_loss_rate =
268 iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
269 BT_PROFILE_NOTIFICATION, 0) > 4;
270 u8 wifi_loss_rate;
271
272 if (mvm->last_bt_notif.wifi_loss_low_rssi == BT_OFF)
273 return true;
274
275 if (primary)
276 return false;
277
278 /* The feature is not supported */
279 if (!have_wifi_loss_rate)
280 return true;
281
282
283 /*
284 * In case we don't know the RSSI - take the lower wifi loss,
285 * so we will more likely enter eSR, and if RSSI is low -
286 * we will get an update on this and exit eSR.
287 */
288 if (!link_rssi)
289 wifi_loss_rate = mvm->last_bt_notif.wifi_loss_mid_high_rssi;
290
291 else if (mvmvif->esr_active)
292 /* RSSI needs to get really low to disable eSR... */
293 wifi_loss_rate =
294 link_rssi <= -IWL_MVM_BT_COEX_DISABLE_ESR_THRESH ?
295 mvm->last_bt_notif.wifi_loss_low_rssi :
296 mvm->last_bt_notif.wifi_loss_mid_high_rssi;
297 else
298 /* ...And really high before we enable it back */
299 wifi_loss_rate =
300 link_rssi <= -IWL_MVM_BT_COEX_ENABLE_ESR_THRESH ?
301 mvm->last_bt_notif.wifi_loss_low_rssi :
302 mvm->last_bt_notif.wifi_loss_mid_high_rssi;
303
304 return wifi_loss_rate <= IWL_MVM_BT_COEX_WIFI_LOSS_THRESH;
305 }
306
iwl_mvm_bt_coex_update_link_esr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,int link_id)307 void iwl_mvm_bt_coex_update_link_esr(struct iwl_mvm *mvm,
308 struct ieee80211_vif *vif,
309 int link_id)
310 {
311 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
312 struct iwl_mvm_vif_link_info *link = mvmvif->link[link_id];
313
314 if (!ieee80211_vif_is_mld(vif) ||
315 !iwl_mvm_vif_from_mac80211(vif)->authorized ||
316 WARN_ON(!link))
317 return;
318
319 if (!iwl_mvm_bt_coex_calculate_esr_mode(mvm, vif,
320 (s8)link->beacon_stats.avg_signal,
321 link_id == iwl_mvm_get_primary_link(vif)))
322 /* In case we decided to exit eSR - stay with the primary */
323 iwl_mvm_exit_esr(mvm, vif, IWL_MVM_ESR_EXIT_COEX,
324 iwl_mvm_get_primary_link(vif));
325 }
326
iwl_mvm_bt_notif_per_link(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_bt_iterator_data * data,unsigned int link_id)327 static void iwl_mvm_bt_notif_per_link(struct iwl_mvm *mvm,
328 struct ieee80211_vif *vif,
329 struct iwl_bt_iterator_data *data,
330 unsigned int link_id)
331 {
332 /* default smps_mode is AUTOMATIC - only used for client modes */
333 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
334 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
335 u32 bt_activity_grading, min_ag_for_static_smps;
336 struct ieee80211_chanctx_conf *chanctx_conf;
337 struct iwl_mvm_vif_link_info *link_info;
338 struct ieee80211_bss_conf *link_conf;
339 int ave_rssi;
340
341 lockdep_assert_held(&mvm->mutex);
342
343 link_info = mvmvif->link[link_id];
344 if (!link_info)
345 return;
346
347 link_conf = rcu_dereference(vif->link_conf[link_id]);
348 /* This can happen due to races: if we receive the notification
349 * and have the mutex held, while mac80211 is stuck on our mutex
350 * in the middle of removing the link.
351 */
352 if (!link_conf)
353 return;
354
355 chanctx_conf = rcu_dereference(link_conf->chanctx_conf);
356
357 /* If channel context is invalid or not on 2.4GHz .. */
358 if ((!chanctx_conf ||
359 chanctx_conf->def.chan->band != NL80211_BAND_2GHZ)) {
360 if (vif->type == NL80211_IFTYPE_STATION) {
361 /* ... relax constraints and disable rssi events */
362 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
363 smps_mode, link_id);
364 iwl_mvm_bt_coex_reduced_txp(mvm, link_info->ap_sta_id,
365 false);
366 iwl_mvm_bt_coex_enable_rssi_event(mvm, link_info, false,
367 0);
368 }
369 return;
370 }
371
372 iwl_mvm_bt_coex_update_link_esr(mvm, vif, link_id);
373
374 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2))
375 min_ag_for_static_smps = BT_VERY_HIGH_TRAFFIC;
376 else
377 min_ag_for_static_smps = BT_HIGH_TRAFFIC;
378
379 bt_activity_grading = le32_to_cpu(data->notif->bt_activity_grading);
380 if (bt_activity_grading >= min_ag_for_static_smps)
381 smps_mode = IEEE80211_SMPS_STATIC;
382 else if (bt_activity_grading >= BT_LOW_TRAFFIC)
383 smps_mode = IEEE80211_SMPS_DYNAMIC;
384
385 /* relax SMPS constraints for next association */
386 if (!vif->cfg.assoc)
387 smps_mode = IEEE80211_SMPS_AUTOMATIC;
388
389 if (link_info->phy_ctxt &&
390 (mvm->last_bt_notif.rrc_status & BIT(link_info->phy_ctxt->id)))
391 smps_mode = IEEE80211_SMPS_AUTOMATIC;
392
393 IWL_DEBUG_COEX(data->mvm,
394 "mac %d link %d: bt_activity_grading %d smps_req %d\n",
395 mvmvif->id, link_info->fw_link_id,
396 bt_activity_grading, smps_mode);
397
398 if (vif->type == NL80211_IFTYPE_STATION)
399 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
400 smps_mode, link_id);
401
402 /* low latency is always primary */
403 if (iwl_mvm_vif_low_latency(mvmvif)) {
404 data->primary_ll = true;
405
406 data->secondary = data->primary;
407 data->primary = chanctx_conf;
408 }
409
410 if (vif->type == NL80211_IFTYPE_AP) {
411 if (!mvmvif->ap_ibss_active)
412 return;
413
414 if (chanctx_conf == data->primary)
415 return;
416
417 if (!data->primary_ll) {
418 /*
419 * downgrade the current primary no matter what its
420 * type is.
421 */
422 data->secondary = data->primary;
423 data->primary = chanctx_conf;
424 } else {
425 /* there is low latency vif - we will be secondary */
426 data->secondary = chanctx_conf;
427 }
428
429 /* FIXME: TCM load per interface? or need something per link? */
430 if (data->primary == chanctx_conf)
431 data->primary_load = mvm->tcm.result.load[mvmvif->id];
432 else if (data->secondary == chanctx_conf)
433 data->secondary_load = mvm->tcm.result.load[mvmvif->id];
434 return;
435 }
436
437 /*
438 * STA / P2P Client, try to be primary if first vif. If we are in low
439 * latency mode, we are already in primary and just don't do much
440 */
441 if (!data->primary || data->primary == chanctx_conf)
442 data->primary = chanctx_conf;
443 else if (!data->secondary)
444 /* if secondary is not NULL, it might be a GO */
445 data->secondary = chanctx_conf;
446
447 /* FIXME: TCM load per interface? or need something per link? */
448 if (data->primary == chanctx_conf)
449 data->primary_load = mvm->tcm.result.load[mvmvif->id];
450 else if (data->secondary == chanctx_conf)
451 data->secondary_load = mvm->tcm.result.load[mvmvif->id];
452 /*
453 * don't reduce the Tx power if one of these is true:
454 * we are in LOOSE
455 * BT is inactive
456 * we are not associated
457 */
458 if (iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT ||
459 le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF ||
460 !vif->cfg.assoc) {
461 iwl_mvm_bt_coex_reduced_txp(mvm, link_info->ap_sta_id, false);
462 iwl_mvm_bt_coex_enable_rssi_event(mvm, link_info, false, 0);
463 return;
464 }
465
466 /* try to get the avg rssi from fw */
467 ave_rssi = link_info->bf_data.ave_beacon_signal;
468
469 /* if the RSSI isn't valid, fake it is very low */
470 if (!ave_rssi)
471 ave_rssi = -100;
472 if (ave_rssi > -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH) {
473 if (iwl_mvm_bt_coex_reduced_txp(mvm, link_info->ap_sta_id,
474 true))
475 IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
476 } else if (ave_rssi < -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH) {
477 if (iwl_mvm_bt_coex_reduced_txp(mvm, link_info->ap_sta_id,
478 false))
479 IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
480 }
481
482 /* Begin to monitor the RSSI: it may influence the reduced Tx power */
483 iwl_mvm_bt_coex_enable_rssi_event(mvm, link_info, true, ave_rssi);
484 }
485
486 /* must be called under rcu_read_lock */
iwl_mvm_bt_notif_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)487 static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac,
488 struct ieee80211_vif *vif)
489 {
490 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
491 struct iwl_bt_iterator_data *data = _data;
492 struct iwl_mvm *mvm = data->mvm;
493 unsigned int link_id;
494
495 lockdep_assert_held(&mvm->mutex);
496
497 switch (vif->type) {
498 case NL80211_IFTYPE_STATION:
499 break;
500 case NL80211_IFTYPE_AP:
501 if (!mvmvif->ap_ibss_active)
502 return;
503 break;
504 default:
505 return;
506 }
507
508 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++)
509 iwl_mvm_bt_notif_per_link(mvm, vif, data, link_id);
510 }
511
iwl_mvm_bt_coex_notif_handle(struct iwl_mvm * mvm)512 static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
513 {
514 struct iwl_bt_iterator_data data = {
515 .mvm = mvm,
516 .notif = &mvm->last_bt_notif,
517 };
518 struct iwl_bt_coex_ci_cmd cmd = {};
519 u8 ci_bw_idx;
520
521 /* Ignore updates if we are in force mode */
522 if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
523 return;
524
525 rcu_read_lock();
526 ieee80211_iterate_active_interfaces_atomic(
527 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
528 iwl_mvm_bt_notif_iterator, &data);
529
530 if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210) {
531 rcu_read_unlock();
532 return;
533 }
534
535 iwl_mvm_bt_coex_tcm_based_ci(mvm, &data);
536
537 if (data.primary) {
538 struct ieee80211_chanctx_conf *chan = data.primary;
539 if (WARN_ON(!chan->def.chan)) {
540 rcu_read_unlock();
541 return;
542 }
543
544 if (chan->def.width < NL80211_CHAN_WIDTH_40) {
545 ci_bw_idx = 0;
546 } else {
547 if (chan->def.center_freq1 >
548 chan->def.chan->center_freq)
549 ci_bw_idx = 2;
550 else
551 ci_bw_idx = 1;
552 }
553
554 cmd.bt_primary_ci =
555 iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
556 cmd.primary_ch_phy_id =
557 cpu_to_le32(*((u16 *)data.primary->drv_priv));
558 }
559
560 if (data.secondary) {
561 struct ieee80211_chanctx_conf *chan = data.secondary;
562 if (WARN_ON(!data.secondary->def.chan)) {
563 rcu_read_unlock();
564 return;
565 }
566
567 if (chan->def.width < NL80211_CHAN_WIDTH_40) {
568 ci_bw_idx = 0;
569 } else {
570 if (chan->def.center_freq1 >
571 chan->def.chan->center_freq)
572 ci_bw_idx = 2;
573 else
574 ci_bw_idx = 1;
575 }
576
577 cmd.bt_secondary_ci =
578 iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
579 cmd.secondary_ch_phy_id =
580 cpu_to_le32(*((u16 *)data.secondary->drv_priv));
581 }
582
583 rcu_read_unlock();
584
585 /* Don't spam the fw with the same command over and over */
586 if (memcmp(&cmd, &mvm->last_bt_ci_cmd, sizeof(cmd))) {
587 if (iwl_mvm_send_cmd_pdu(mvm, BT_COEX_CI, 0,
588 sizeof(cmd), &cmd))
589 IWL_ERR(mvm, "Failed to send BT_CI cmd\n");
590 memcpy(&mvm->last_bt_ci_cmd, &cmd, sizeof(cmd));
591 }
592 }
593
iwl_mvm_rx_bt_coex_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)594 void iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
595 struct iwl_rx_cmd_buffer *rxb)
596 {
597 struct iwl_rx_packet *pkt = rxb_addr(rxb);
598 struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data;
599
600 IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
601 IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);
602 IWL_DEBUG_COEX(mvm, "\tBT primary_ch_lut %d\n",
603 le32_to_cpu(notif->primary_ch_lut));
604 IWL_DEBUG_COEX(mvm, "\tBT secondary_ch_lut %d\n",
605 le32_to_cpu(notif->secondary_ch_lut));
606 IWL_DEBUG_COEX(mvm, "\tBT activity grading %d\n",
607 le32_to_cpu(notif->bt_activity_grading));
608
609 /* remember this notification for future use: rssi fluctuations */
610 memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));
611
612 iwl_mvm_bt_coex_notif_handle(mvm);
613 }
614
iwl_mvm_bt_rssi_event(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum ieee80211_rssi_event_data rssi_event)615 void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
616 enum ieee80211_rssi_event_data rssi_event)
617 {
618 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
619 int ret;
620
621 lockdep_assert_held(&mvm->mutex);
622
623 /* Ignore updates if we are in force mode */
624 if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
625 return;
626
627 /*
628 * Rssi update while not associated - can happen since the statistics
629 * are handled asynchronously
630 */
631 if (mvmvif->deflink.ap_sta_id == IWL_MVM_INVALID_STA)
632 return;
633
634 /* No BT - reports should be disabled */
635 if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF)
636 return;
637
638 IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
639 rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");
640
641 /*
642 * Check if rssi is good enough for reduced Tx power, but not in loose
643 * scheme.
644 */
645 if (rssi_event == RSSI_EVENT_LOW ||
646 iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT)
647 ret = iwl_mvm_bt_coex_reduced_txp(mvm,
648 mvmvif->deflink.ap_sta_id,
649 false);
650 else
651 ret = iwl_mvm_bt_coex_reduced_txp(mvm,
652 mvmvif->deflink.ap_sta_id,
653 true);
654
655 if (ret)
656 IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");
657 }
658
659 #define LINK_QUAL_AGG_TIME_LIMIT_DEF (4000)
660 #define LINK_QUAL_AGG_TIME_LIMIT_BT_ACT (1200)
661
iwl_mvm_coex_agg_time_limit(struct iwl_mvm * mvm,struct ieee80211_sta * sta)662 u16 iwl_mvm_coex_agg_time_limit(struct iwl_mvm *mvm,
663 struct ieee80211_sta *sta)
664 {
665 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
666 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
667 struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->deflink.phy_ctxt;
668 enum iwl_bt_coex_lut_type lut_type;
669
670 if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
671 return LINK_QUAL_AGG_TIME_LIMIT_DEF;
672
673 if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
674 BT_HIGH_TRAFFIC)
675 return LINK_QUAL_AGG_TIME_LIMIT_DEF;
676
677 lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
678
679 if (lut_type == BT_COEX_LOOSE_LUT || lut_type == BT_COEX_INVALID_LUT)
680 return LINK_QUAL_AGG_TIME_LIMIT_DEF;
681
682 /* tight coex, high bt traffic, reduce AGG time limit */
683 return LINK_QUAL_AGG_TIME_LIMIT_BT_ACT;
684 }
685
iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm * mvm,struct ieee80211_sta * sta)686 bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
687 struct ieee80211_sta *sta)
688 {
689 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
690 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
691 struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->deflink.phy_ctxt;
692 enum iwl_bt_coex_lut_type lut_type;
693
694 if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
695 return true;
696
697 if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
698 BT_HIGH_TRAFFIC)
699 return true;
700
701 /*
702 * In Tight / TxTxDis, BT can't Rx while we Tx, so use both antennas
703 * since BT is already killed.
704 * In Loose, BT can Rx while we Tx, so forbid MIMO to let BT Rx while
705 * we Tx.
706 * When we are in 5GHz, we'll get BT_COEX_INVALID_LUT allowing MIMO.
707 */
708 lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
709 return lut_type != BT_COEX_LOOSE_LUT;
710 }
711
iwl_mvm_bt_coex_is_ant_avail(struct iwl_mvm * mvm,u8 ant)712 bool iwl_mvm_bt_coex_is_ant_avail(struct iwl_mvm *mvm, u8 ant)
713 {
714 if (ant & mvm->cfg->non_shared_ant)
715 return true;
716
717 return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
718 BT_HIGH_TRAFFIC;
719 }
720
iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm * mvm)721 bool iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm *mvm)
722 {
723 return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) < BT_HIGH_TRAFFIC;
724 }
725
iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm * mvm,enum nl80211_band band)726 bool iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm *mvm,
727 enum nl80211_band band)
728 {
729 u32 bt_activity = le32_to_cpu(mvm->last_bt_notif.bt_activity_grading);
730
731 if (band != NL80211_BAND_2GHZ)
732 return false;
733
734 return bt_activity >= BT_LOW_TRAFFIC;
735 }
736
iwl_mvm_bt_coex_get_single_ant_msk(struct iwl_mvm * mvm,u8 enabled_ants)737 u8 iwl_mvm_bt_coex_get_single_ant_msk(struct iwl_mvm *mvm, u8 enabled_ants)
738 {
739 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) &&
740 (mvm->cfg->non_shared_ant & enabled_ants))
741 return mvm->cfg->non_shared_ant;
742
743 return first_antenna(enabled_ants);
744 }
745
iwl_mvm_bt_coex_tx_prio(struct iwl_mvm * mvm,struct ieee80211_hdr * hdr,struct ieee80211_tx_info * info,u8 ac)746 u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
747 struct ieee80211_tx_info *info, u8 ac)
748 {
749 __le16 fc = hdr->frame_control;
750 bool mplut_enabled = iwl_mvm_is_mplut_supported(mvm);
751
752 if (info->band != NL80211_BAND_2GHZ)
753 return 0;
754
755 if (unlikely(mvm->bt_tx_prio))
756 return mvm->bt_tx_prio - 1;
757
758 if (likely(ieee80211_is_data(fc))) {
759 if (likely(ieee80211_is_data_qos(fc))) {
760 switch (ac) {
761 case IEEE80211_AC_BE:
762 return mplut_enabled ? 1 : 0;
763 case IEEE80211_AC_VI:
764 return mplut_enabled ? 2 : 3;
765 case IEEE80211_AC_VO:
766 return 3;
767 default:
768 return 0;
769 }
770 } else if (is_multicast_ether_addr(hdr->addr1)) {
771 return 3;
772 } else
773 return 0;
774 } else if (ieee80211_is_mgmt(fc)) {
775 return ieee80211_is_disassoc(fc) ? 0 : 3;
776 } else if (ieee80211_is_ctl(fc)) {
777 /* ignore cfend and cfendack frames as we never send those */
778 return 3;
779 }
780
781 return 0;
782 }
783
iwl_mvm_bt_coex_vif_change(struct iwl_mvm * mvm)784 void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm)
785 {
786 iwl_mvm_bt_coex_notif_handle(mvm);
787 }
788