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, 2018 - 2020 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 *
20 * The full GNU General Public License is included in this distribution
21 * in the file called COPYING.
22 *
23 * Contact Information:
24 * Intel Linux Wireless <linuxwifi@intel.com>
25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *
27 * BSD LICENSE
28 *
29 * Copyright(c) 2013 - 2014, 2018 - 2020 Intel Corporation. All rights reserved.
30 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 *
37 * * Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * * Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in
41 * the documentation and/or other materials provided with the
42 * distribution.
43 * * Neither the name Intel Corporation nor the names of its
44 * contributors may be used to endorse or promote products derived
45 * from this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
58 *
59 *****************************************************************************/
60
61 #include <linux/ieee80211.h>
62 #include <linux/etherdevice.h>
63 #include <net/mac80211.h>
64
65 #include "fw/api/coex.h"
66 #include "iwl-modparams.h"
67 #include "mvm.h"
68 #include "iwl-debug.h"
69
70 /* 20MHz / 40MHz below / 40Mhz above*/
71 static const __le64 iwl_ci_mask[][3] = {
72 /* dummy entry for channel 0 */
73 {cpu_to_le64(0), cpu_to_le64(0), cpu_to_le64(0)},
74 {
75 cpu_to_le64(0x0000001FFFULL),
76 cpu_to_le64(0x0ULL),
77 cpu_to_le64(0x00007FFFFFULL),
78 },
79 {
80 cpu_to_le64(0x000000FFFFULL),
81 cpu_to_le64(0x0ULL),
82 cpu_to_le64(0x0003FFFFFFULL),
83 },
84 {
85 cpu_to_le64(0x000003FFFCULL),
86 cpu_to_le64(0x0ULL),
87 cpu_to_le64(0x000FFFFFFCULL),
88 },
89 {
90 cpu_to_le64(0x00001FFFE0ULL),
91 cpu_to_le64(0x0ULL),
92 cpu_to_le64(0x007FFFFFE0ULL),
93 },
94 {
95 cpu_to_le64(0x00007FFF80ULL),
96 cpu_to_le64(0x00007FFFFFULL),
97 cpu_to_le64(0x01FFFFFF80ULL),
98 },
99 {
100 cpu_to_le64(0x0003FFFC00ULL),
101 cpu_to_le64(0x0003FFFFFFULL),
102 cpu_to_le64(0x0FFFFFFC00ULL),
103 },
104 {
105 cpu_to_le64(0x000FFFF000ULL),
106 cpu_to_le64(0x000FFFFFFCULL),
107 cpu_to_le64(0x3FFFFFF000ULL),
108 },
109 {
110 cpu_to_le64(0x007FFF8000ULL),
111 cpu_to_le64(0x007FFFFFE0ULL),
112 cpu_to_le64(0xFFFFFF8000ULL),
113 },
114 {
115 cpu_to_le64(0x01FFFE0000ULL),
116 cpu_to_le64(0x01FFFFFF80ULL),
117 cpu_to_le64(0xFFFFFE0000ULL),
118 },
119 {
120 cpu_to_le64(0x0FFFF00000ULL),
121 cpu_to_le64(0x0FFFFFFC00ULL),
122 cpu_to_le64(0x0ULL),
123 },
124 {
125 cpu_to_le64(0x3FFFC00000ULL),
126 cpu_to_le64(0x3FFFFFF000ULL),
127 cpu_to_le64(0x0)
128 },
129 {
130 cpu_to_le64(0xFFFE000000ULL),
131 cpu_to_le64(0xFFFFFF8000ULL),
132 cpu_to_le64(0x0)
133 },
134 {
135 cpu_to_le64(0xFFF8000000ULL),
136 cpu_to_le64(0xFFFFFE0000ULL),
137 cpu_to_le64(0x0)
138 },
139 {
140 cpu_to_le64(0xFE00000000ULL),
141 cpu_to_le64(0x0ULL),
142 cpu_to_le64(0x0ULL)
143 },
144 };
145
146 static enum iwl_bt_coex_lut_type
iwl_get_coex_type(struct iwl_mvm * mvm,const struct ieee80211_vif * vif)147 iwl_get_coex_type(struct iwl_mvm *mvm, const struct ieee80211_vif *vif)
148 {
149 struct ieee80211_chanctx_conf *chanctx_conf;
150 enum iwl_bt_coex_lut_type ret;
151 u16 phy_ctx_id;
152 u32 primary_ch_phy_id, secondary_ch_phy_id;
153
154 /*
155 * Checking that we hold mvm->mutex is a good idea, but the rate
156 * control can't acquire the mutex since it runs in Tx path.
157 * So this is racy in that case, but in the worst case, the AMPDU
158 * size limit will be wrong for a short time which is not a big
159 * issue.
160 */
161
162 rcu_read_lock();
163
164 chanctx_conf = rcu_dereference(vif->chanctx_conf);
165
166 if (!chanctx_conf ||
167 chanctx_conf->def.chan->band != NL80211_BAND_2GHZ) {
168 rcu_read_unlock();
169 return BT_COEX_INVALID_LUT;
170 }
171
172 ret = BT_COEX_TX_DIS_LUT;
173
174 if (mvm->cfg->bt_shared_single_ant) {
175 rcu_read_unlock();
176 return ret;
177 }
178
179 phy_ctx_id = *((u16 *)chanctx_conf->drv_priv);
180 primary_ch_phy_id = le32_to_cpu(mvm->last_bt_ci_cmd.primary_ch_phy_id);
181 secondary_ch_phy_id =
182 le32_to_cpu(mvm->last_bt_ci_cmd.secondary_ch_phy_id);
183
184 if (primary_ch_phy_id == phy_ctx_id)
185 ret = le32_to_cpu(mvm->last_bt_notif.primary_ch_lut);
186 else if (secondary_ch_phy_id == phy_ctx_id)
187 ret = le32_to_cpu(mvm->last_bt_notif.secondary_ch_lut);
188 /* else - default = TX TX disallowed */
189
190 rcu_read_unlock();
191
192 return ret;
193 }
194
iwl_mvm_send_bt_init_conf(struct iwl_mvm * mvm)195 int iwl_mvm_send_bt_init_conf(struct iwl_mvm *mvm)
196 {
197 struct iwl_bt_coex_cmd bt_cmd = {};
198 u32 mode;
199
200 lockdep_assert_held(&mvm->mutex);
201
202 if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS)) {
203 switch (mvm->bt_force_ant_mode) {
204 case BT_FORCE_ANT_BT:
205 mode = BT_COEX_BT;
206 break;
207 case BT_FORCE_ANT_WIFI:
208 mode = BT_COEX_WIFI;
209 break;
210 default:
211 WARN_ON(1);
212 mode = 0;
213 }
214
215 bt_cmd.mode = cpu_to_le32(mode);
216 goto send_cmd;
217 }
218
219 bt_cmd.mode = cpu_to_le32(BT_COEX_NW);
220
221 if (IWL_MVM_BT_COEX_SYNC2SCO)
222 bt_cmd.enabled_modules |=
223 cpu_to_le32(BT_COEX_SYNC2SCO_ENABLED);
224
225 if (iwl_mvm_is_mplut_supported(mvm))
226 bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_MPLUT_ENABLED);
227
228 bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_HIGH_BAND_RET);
229
230 send_cmd:
231 memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
232 memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
233
234 return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, 0, sizeof(bt_cmd), &bt_cmd);
235 }
236
iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm * mvm,u8 sta_id,bool enable)237 static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
238 bool enable)
239 {
240 struct iwl_bt_coex_reduced_txp_update_cmd cmd = {};
241 struct iwl_mvm_sta *mvmsta;
242 u32 value;
243
244 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
245 if (!mvmsta)
246 return 0;
247
248 /* nothing to do */
249 if (mvmsta->bt_reduced_txpower == enable)
250 return 0;
251
252 value = mvmsta->sta_id;
253
254 if (enable)
255 value |= BT_REDUCED_TX_POWER_BIT;
256
257 IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n",
258 enable ? "en" : "dis", sta_id);
259
260 cmd.reduced_txp = cpu_to_le32(value);
261 mvmsta->bt_reduced_txpower = enable;
262
263 return iwl_mvm_send_cmd_pdu(mvm, BT_COEX_UPDATE_REDUCED_TXP,
264 CMD_ASYNC, sizeof(cmd), &cmd);
265 }
266
267 struct iwl_bt_iterator_data {
268 struct iwl_bt_coex_profile_notif *notif;
269 struct iwl_mvm *mvm;
270 struct ieee80211_chanctx_conf *primary;
271 struct ieee80211_chanctx_conf *secondary;
272 bool primary_ll;
273 u8 primary_load;
274 u8 secondary_load;
275 };
276
277 static inline
iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm * mvm,struct ieee80211_vif * vif,bool enable,int rssi)278 void iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm *mvm,
279 struct ieee80211_vif *vif,
280 bool enable, int rssi)
281 {
282 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
283
284 mvmvif->bf_data.last_bt_coex_event = rssi;
285 mvmvif->bf_data.bt_coex_max_thold =
286 enable ? -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH : 0;
287 mvmvif->bf_data.bt_coex_min_thold =
288 enable ? -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH : 0;
289 }
290
291 #define MVM_COEX_TCM_PERIOD (HZ * 10)
292
iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm * mvm,struct iwl_bt_iterator_data * data)293 static void iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm *mvm,
294 struct iwl_bt_iterator_data *data)
295 {
296 unsigned long now = jiffies;
297
298 if (!time_after(now, mvm->bt_coex_last_tcm_ts + MVM_COEX_TCM_PERIOD))
299 return;
300
301 mvm->bt_coex_last_tcm_ts = now;
302
303 /* We assume here that we don't have more than 2 vifs on 2.4GHz */
304
305 /* if the primary is low latency, it will stay primary */
306 if (data->primary_ll)
307 return;
308
309 if (data->primary_load >= data->secondary_load)
310 return;
311
312 swap(data->primary, data->secondary);
313 }
314
315 /* must be called under rcu_read_lock */
iwl_mvm_bt_notif_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)316 static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac,
317 struct ieee80211_vif *vif)
318 {
319 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
320 struct iwl_bt_iterator_data *data = _data;
321 struct iwl_mvm *mvm = data->mvm;
322 struct ieee80211_chanctx_conf *chanctx_conf;
323 /* default smps_mode is AUTOMATIC - only used for client modes */
324 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
325 u32 bt_activity_grading, min_ag_for_static_smps;
326 int ave_rssi;
327
328 lockdep_assert_held(&mvm->mutex);
329
330 switch (vif->type) {
331 case NL80211_IFTYPE_STATION:
332 break;
333 case NL80211_IFTYPE_AP:
334 if (!mvmvif->ap_ibss_active)
335 return;
336 break;
337 default:
338 return;
339 }
340
341 chanctx_conf = rcu_dereference(vif->chanctx_conf);
342
343 /* If channel context is invalid or not on 2.4GHz .. */
344 if ((!chanctx_conf ||
345 chanctx_conf->def.chan->band != NL80211_BAND_2GHZ)) {
346 if (vif->type == NL80211_IFTYPE_STATION) {
347 /* ... relax constraints and disable rssi events */
348 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
349 smps_mode);
350 iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
351 false);
352 iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
353 }
354 return;
355 }
356
357 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2))
358 min_ag_for_static_smps = BT_VERY_HIGH_TRAFFIC;
359 else
360 min_ag_for_static_smps = BT_HIGH_TRAFFIC;
361
362 bt_activity_grading = le32_to_cpu(data->notif->bt_activity_grading);
363 if (bt_activity_grading >= min_ag_for_static_smps)
364 smps_mode = IEEE80211_SMPS_STATIC;
365 else if (bt_activity_grading >= BT_LOW_TRAFFIC)
366 smps_mode = IEEE80211_SMPS_DYNAMIC;
367
368 /* relax SMPS constraints for next association */
369 if (!vif->bss_conf.assoc)
370 smps_mode = IEEE80211_SMPS_AUTOMATIC;
371
372 if (mvmvif->phy_ctxt &&
373 (mvm->last_bt_notif.rrc_status & BIT(mvmvif->phy_ctxt->id)))
374 smps_mode = IEEE80211_SMPS_AUTOMATIC;
375
376 IWL_DEBUG_COEX(data->mvm,
377 "mac %d: bt_activity_grading %d smps_req %d\n",
378 mvmvif->id, bt_activity_grading, smps_mode);
379
380 if (vif->type == NL80211_IFTYPE_STATION)
381 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
382 smps_mode);
383
384 /* low latency is always primary */
385 if (iwl_mvm_vif_low_latency(mvmvif)) {
386 data->primary_ll = true;
387
388 data->secondary = data->primary;
389 data->primary = chanctx_conf;
390 }
391
392 if (vif->type == NL80211_IFTYPE_AP) {
393 if (!mvmvif->ap_ibss_active)
394 return;
395
396 if (chanctx_conf == data->primary)
397 return;
398
399 if (!data->primary_ll) {
400 /*
401 * downgrade the current primary no matter what its
402 * type is.
403 */
404 data->secondary = data->primary;
405 data->primary = chanctx_conf;
406 } else {
407 /* there is low latency vif - we will be secondary */
408 data->secondary = chanctx_conf;
409 }
410
411 if (data->primary == chanctx_conf)
412 data->primary_load = mvm->tcm.result.load[mvmvif->id];
413 else if (data->secondary == chanctx_conf)
414 data->secondary_load = mvm->tcm.result.load[mvmvif->id];
415 return;
416 }
417
418 /*
419 * STA / P2P Client, try to be primary if first vif. If we are in low
420 * latency mode, we are already in primary and just don't do much
421 */
422 if (!data->primary || data->primary == chanctx_conf)
423 data->primary = chanctx_conf;
424 else if (!data->secondary)
425 /* if secondary is not NULL, it might be a GO */
426 data->secondary = chanctx_conf;
427
428 if (data->primary == chanctx_conf)
429 data->primary_load = mvm->tcm.result.load[mvmvif->id];
430 else if (data->secondary == chanctx_conf)
431 data->secondary_load = mvm->tcm.result.load[mvmvif->id];
432 /*
433 * don't reduce the Tx power if one of these is true:
434 * we are in LOOSE
435 * single share antenna product
436 * BT is inactive
437 * we are not associated
438 */
439 if (iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT ||
440 mvm->cfg->bt_shared_single_ant || !vif->bss_conf.assoc ||
441 le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF) {
442 iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false);
443 iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
444 return;
445 }
446
447 /* try to get the avg rssi from fw */
448 ave_rssi = mvmvif->bf_data.ave_beacon_signal;
449
450 /* if the RSSI isn't valid, fake it is very low */
451 if (!ave_rssi)
452 ave_rssi = -100;
453 if (ave_rssi > -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH) {
454 if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true))
455 IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
456 } else if (ave_rssi < -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH) {
457 if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
458 IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
459 }
460
461 /* Begin to monitor the RSSI: it may influence the reduced Tx power */
462 iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, true, ave_rssi);
463 }
464
iwl_mvm_bt_coex_notif_handle(struct iwl_mvm * mvm)465 static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
466 {
467 struct iwl_bt_iterator_data data = {
468 .mvm = mvm,
469 .notif = &mvm->last_bt_notif,
470 };
471 struct iwl_bt_coex_ci_cmd cmd = {};
472 u8 ci_bw_idx;
473
474 /* Ignore updates if we are in force mode */
475 if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
476 return;
477
478 rcu_read_lock();
479 ieee80211_iterate_active_interfaces_atomic(
480 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
481 iwl_mvm_bt_notif_iterator, &data);
482
483 iwl_mvm_bt_coex_tcm_based_ci(mvm, &data);
484
485 if (data.primary) {
486 struct ieee80211_chanctx_conf *chan = data.primary;
487 if (WARN_ON(!chan->def.chan)) {
488 rcu_read_unlock();
489 return;
490 }
491
492 if (chan->def.width < NL80211_CHAN_WIDTH_40) {
493 ci_bw_idx = 0;
494 } else {
495 if (chan->def.center_freq1 >
496 chan->def.chan->center_freq)
497 ci_bw_idx = 2;
498 else
499 ci_bw_idx = 1;
500 }
501
502 cmd.bt_primary_ci =
503 iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
504 cmd.primary_ch_phy_id =
505 cpu_to_le32(*((u16 *)data.primary->drv_priv));
506 }
507
508 if (data.secondary) {
509 struct ieee80211_chanctx_conf *chan = data.secondary;
510 if (WARN_ON(!data.secondary->def.chan)) {
511 rcu_read_unlock();
512 return;
513 }
514
515 if (chan->def.width < NL80211_CHAN_WIDTH_40) {
516 ci_bw_idx = 0;
517 } else {
518 if (chan->def.center_freq1 >
519 chan->def.chan->center_freq)
520 ci_bw_idx = 2;
521 else
522 ci_bw_idx = 1;
523 }
524
525 cmd.bt_secondary_ci =
526 iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
527 cmd.secondary_ch_phy_id =
528 cpu_to_le32(*((u16 *)data.secondary->drv_priv));
529 }
530
531 rcu_read_unlock();
532
533 /* Don't spam the fw with the same command over and over */
534 if (memcmp(&cmd, &mvm->last_bt_ci_cmd, sizeof(cmd))) {
535 if (iwl_mvm_send_cmd_pdu(mvm, BT_COEX_CI, 0,
536 sizeof(cmd), &cmd))
537 IWL_ERR(mvm, "Failed to send BT_CI cmd\n");
538 memcpy(&mvm->last_bt_ci_cmd, &cmd, sizeof(cmd));
539 }
540 }
541
iwl_mvm_rx_bt_coex_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)542 void iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
543 struct iwl_rx_cmd_buffer *rxb)
544 {
545 struct iwl_rx_packet *pkt = rxb_addr(rxb);
546 struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data;
547
548 IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
549 IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);
550 IWL_DEBUG_COEX(mvm, "\tBT primary_ch_lut %d\n",
551 le32_to_cpu(notif->primary_ch_lut));
552 IWL_DEBUG_COEX(mvm, "\tBT secondary_ch_lut %d\n",
553 le32_to_cpu(notif->secondary_ch_lut));
554 IWL_DEBUG_COEX(mvm, "\tBT activity grading %d\n",
555 le32_to_cpu(notif->bt_activity_grading));
556
557 /* remember this notification for future use: rssi fluctuations */
558 memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));
559
560 iwl_mvm_bt_coex_notif_handle(mvm);
561 }
562
iwl_mvm_bt_rssi_event(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum ieee80211_rssi_event_data rssi_event)563 void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
564 enum ieee80211_rssi_event_data rssi_event)
565 {
566 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
567 int ret;
568
569 lockdep_assert_held(&mvm->mutex);
570
571 /* Ignore updates if we are in force mode */
572 if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
573 return;
574
575 /*
576 * Rssi update while not associated - can happen since the statistics
577 * are handled asynchronously
578 */
579 if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA)
580 return;
581
582 /* No BT - reports should be disabled */
583 if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF)
584 return;
585
586 IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
587 rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");
588
589 /*
590 * Check if rssi is good enough for reduced Tx power, but not in loose
591 * scheme.
592 */
593 if (rssi_event == RSSI_EVENT_LOW || mvm->cfg->bt_shared_single_ant ||
594 iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT)
595 ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
596 false);
597 else
598 ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true);
599
600 if (ret)
601 IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");
602 }
603
604 #define LINK_QUAL_AGG_TIME_LIMIT_DEF (4000)
605 #define LINK_QUAL_AGG_TIME_LIMIT_BT_ACT (1200)
606
iwl_mvm_coex_agg_time_limit(struct iwl_mvm * mvm,struct ieee80211_sta * sta)607 u16 iwl_mvm_coex_agg_time_limit(struct iwl_mvm *mvm,
608 struct ieee80211_sta *sta)
609 {
610 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
611 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
612 struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
613 enum iwl_bt_coex_lut_type lut_type;
614
615 if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
616 return LINK_QUAL_AGG_TIME_LIMIT_DEF;
617
618 if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
619 BT_HIGH_TRAFFIC)
620 return LINK_QUAL_AGG_TIME_LIMIT_DEF;
621
622 lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
623
624 if (lut_type == BT_COEX_LOOSE_LUT || lut_type == BT_COEX_INVALID_LUT)
625 return LINK_QUAL_AGG_TIME_LIMIT_DEF;
626
627 /* tight coex, high bt traffic, reduce AGG time limit */
628 return LINK_QUAL_AGG_TIME_LIMIT_BT_ACT;
629 }
630
iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm * mvm,struct ieee80211_sta * sta)631 bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
632 struct ieee80211_sta *sta)
633 {
634 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
635 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
636 struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
637 enum iwl_bt_coex_lut_type lut_type;
638
639 if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
640 return true;
641
642 if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
643 BT_HIGH_TRAFFIC)
644 return true;
645
646 /*
647 * In Tight / TxTxDis, BT can't Rx while we Tx, so use both antennas
648 * since BT is already killed.
649 * In Loose, BT can Rx while we Tx, so forbid MIMO to let BT Rx while
650 * we Tx.
651 * When we are in 5GHz, we'll get BT_COEX_INVALID_LUT allowing MIMO.
652 */
653 lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
654 return lut_type != BT_COEX_LOOSE_LUT;
655 }
656
iwl_mvm_bt_coex_is_ant_avail(struct iwl_mvm * mvm,u8 ant)657 bool iwl_mvm_bt_coex_is_ant_avail(struct iwl_mvm *mvm, u8 ant)
658 {
659 /* there is no other antenna, shared antenna is always available */
660 if (mvm->cfg->bt_shared_single_ant)
661 return true;
662
663 if (ant & mvm->cfg->non_shared_ant)
664 return true;
665
666 return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
667 BT_HIGH_TRAFFIC;
668 }
669
iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm * mvm)670 bool iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm *mvm)
671 {
672 /* there is no other antenna, shared antenna is always available */
673 if (mvm->cfg->bt_shared_single_ant)
674 return true;
675
676 return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) < BT_HIGH_TRAFFIC;
677 }
678
iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm * mvm,enum nl80211_band band)679 bool iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm *mvm,
680 enum nl80211_band band)
681 {
682 u32 bt_activity = le32_to_cpu(mvm->last_bt_notif.bt_activity_grading);
683
684 if (band != NL80211_BAND_2GHZ)
685 return false;
686
687 return bt_activity >= BT_LOW_TRAFFIC;
688 }
689
iwl_mvm_bt_coex_get_single_ant_msk(struct iwl_mvm * mvm,u8 enabled_ants)690 u8 iwl_mvm_bt_coex_get_single_ant_msk(struct iwl_mvm *mvm, u8 enabled_ants)
691 {
692 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) &&
693 (mvm->cfg->non_shared_ant & enabled_ants))
694 return mvm->cfg->non_shared_ant;
695
696 return first_antenna(enabled_ants);
697 }
698
iwl_mvm_bt_coex_tx_prio(struct iwl_mvm * mvm,struct ieee80211_hdr * hdr,struct ieee80211_tx_info * info,u8 ac)699 u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
700 struct ieee80211_tx_info *info, u8 ac)
701 {
702 __le16 fc = hdr->frame_control;
703 bool mplut_enabled = iwl_mvm_is_mplut_supported(mvm);
704
705 if (info->band != NL80211_BAND_2GHZ)
706 return 0;
707
708 if (unlikely(mvm->bt_tx_prio))
709 return mvm->bt_tx_prio - 1;
710
711 if (likely(ieee80211_is_data(fc))) {
712 if (likely(ieee80211_is_data_qos(fc))) {
713 switch (ac) {
714 case IEEE80211_AC_BE:
715 return mplut_enabled ? 1 : 0;
716 case IEEE80211_AC_VI:
717 return mplut_enabled ? 2 : 3;
718 case IEEE80211_AC_VO:
719 return 3;
720 default:
721 return 0;
722 }
723 } else if (is_multicast_ether_addr(hdr->addr1)) {
724 return 3;
725 } else
726 return 0;
727 } else if (ieee80211_is_mgmt(fc)) {
728 return ieee80211_is_disassoc(fc) ? 0 : 3;
729 } else if (ieee80211_is_ctl(fc)) {
730 /* ignore cfend and cfendack frames as we never send those */
731 return 3;
732 }
733
734 return 0;
735 }
736
iwl_mvm_bt_coex_vif_change(struct iwl_mvm * mvm)737 void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm)
738 {
739 iwl_mvm_bt_coex_notif_handle(mvm);
740 }
741