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 * 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 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 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 } 194 195 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 mode = iwlwifi_mod_params.bt_coex_active ? BT_COEX_NW : BT_COEX_DISABLE; 220 bt_cmd.mode = cpu_to_le32(mode); 221 222 if (IWL_MVM_BT_COEX_SYNC2SCO) 223 bt_cmd.enabled_modules |= 224 cpu_to_le32(BT_COEX_SYNC2SCO_ENABLED); 225 226 if (iwl_mvm_is_mplut_supported(mvm)) 227 bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_MPLUT_ENABLED); 228 229 bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_HIGH_BAND_RET); 230 231 send_cmd: 232 memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif)); 233 memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd)); 234 235 return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, 0, sizeof(bt_cmd), &bt_cmd); 236 } 237 238 static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id, 239 bool enable) 240 { 241 struct iwl_bt_coex_reduced_txp_update_cmd cmd = {}; 242 struct iwl_mvm_sta *mvmsta; 243 u32 value; 244 int ret; 245 246 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); 247 if (!mvmsta) 248 return 0; 249 250 /* nothing to do */ 251 if (mvmsta->bt_reduced_txpower == enable) 252 return 0; 253 254 value = mvmsta->sta_id; 255 256 if (enable) 257 value |= BT_REDUCED_TX_POWER_BIT; 258 259 IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n", 260 enable ? "en" : "dis", sta_id); 261 262 cmd.reduced_txp = cpu_to_le32(value); 263 mvmsta->bt_reduced_txpower = enable; 264 265 ret = iwl_mvm_send_cmd_pdu(mvm, BT_COEX_UPDATE_REDUCED_TXP, CMD_ASYNC, 266 sizeof(cmd), &cmd); 267 268 return ret; 269 } 270 271 struct iwl_bt_iterator_data { 272 struct iwl_bt_coex_profile_notif *notif; 273 struct iwl_mvm *mvm; 274 struct ieee80211_chanctx_conf *primary; 275 struct ieee80211_chanctx_conf *secondary; 276 bool primary_ll; 277 u8 primary_load; 278 u8 secondary_load; 279 }; 280 281 static inline 282 void iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm *mvm, 283 struct ieee80211_vif *vif, 284 bool enable, int rssi) 285 { 286 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 287 288 mvmvif->bf_data.last_bt_coex_event = rssi; 289 mvmvif->bf_data.bt_coex_max_thold = 290 enable ? -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH : 0; 291 mvmvif->bf_data.bt_coex_min_thold = 292 enable ? -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH : 0; 293 } 294 295 #define MVM_COEX_TCM_PERIOD (HZ * 10) 296 297 static void iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm *mvm, 298 struct iwl_bt_iterator_data *data) 299 { 300 unsigned long now = jiffies; 301 302 if (!time_after(now, mvm->bt_coex_last_tcm_ts + MVM_COEX_TCM_PERIOD)) 303 return; 304 305 mvm->bt_coex_last_tcm_ts = now; 306 307 /* We assume here that we don't have more than 2 vifs on 2.4GHz */ 308 309 /* if the primary is low latency, it will stay primary */ 310 if (data->primary_ll) 311 return; 312 313 if (data->primary_load >= data->secondary_load) 314 return; 315 316 swap(data->primary, data->secondary); 317 } 318 319 /* must be called under rcu_read_lock */ 320 static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac, 321 struct ieee80211_vif *vif) 322 { 323 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 324 struct iwl_bt_iterator_data *data = _data; 325 struct iwl_mvm *mvm = data->mvm; 326 struct ieee80211_chanctx_conf *chanctx_conf; 327 /* default smps_mode is AUTOMATIC - only used for client modes */ 328 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC; 329 u32 bt_activity_grading, min_ag_for_static_smps; 330 int ave_rssi; 331 332 lockdep_assert_held(&mvm->mutex); 333 334 switch (vif->type) { 335 case NL80211_IFTYPE_STATION: 336 break; 337 case NL80211_IFTYPE_AP: 338 if (!mvmvif->ap_ibss_active) 339 return; 340 break; 341 default: 342 return; 343 } 344 345 chanctx_conf = rcu_dereference(vif->chanctx_conf); 346 347 /* If channel context is invalid or not on 2.4GHz .. */ 348 if ((!chanctx_conf || 349 chanctx_conf->def.chan->band != NL80211_BAND_2GHZ)) { 350 if (vif->type == NL80211_IFTYPE_STATION) { 351 /* ... relax constraints and disable rssi events */ 352 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX, 353 smps_mode); 354 iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, 355 false); 356 iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0); 357 } 358 return; 359 } 360 361 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2)) 362 min_ag_for_static_smps = BT_VERY_HIGH_TRAFFIC; 363 else 364 min_ag_for_static_smps = BT_HIGH_TRAFFIC; 365 366 bt_activity_grading = le32_to_cpu(data->notif->bt_activity_grading); 367 if (bt_activity_grading >= min_ag_for_static_smps) 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_get_single_ant_msk(struct iwl_mvm *mvm, u8 enabled_ants) 695 { 696 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) && 697 (mvm->cfg->non_shared_ant & enabled_ants)) 698 return mvm->cfg->non_shared_ant; 699 700 return first_antenna(enabled_ants); 701 } 702 703 u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, 704 struct ieee80211_tx_info *info, u8 ac) 705 { 706 __le16 fc = hdr->frame_control; 707 bool mplut_enabled = iwl_mvm_is_mplut_supported(mvm); 708 709 if (info->band != NL80211_BAND_2GHZ) 710 return 0; 711 712 if (unlikely(mvm->bt_tx_prio)) 713 return mvm->bt_tx_prio - 1; 714 715 if (likely(ieee80211_is_data(fc))) { 716 if (likely(ieee80211_is_data_qos(fc))) { 717 switch (ac) { 718 case IEEE80211_AC_BE: 719 return mplut_enabled ? 1 : 0; 720 case IEEE80211_AC_VI: 721 return mplut_enabled ? 2 : 3; 722 case IEEE80211_AC_VO: 723 return 3; 724 default: 725 return 0; 726 } 727 } else if (is_multicast_ether_addr(hdr->addr1)) { 728 return 3; 729 } else 730 return 0; 731 } else if (ieee80211_is_mgmt(fc)) { 732 return ieee80211_is_disassoc(fc) ? 0 : 3; 733 } else if (ieee80211_is_ctl(fc)) { 734 /* ignore cfend and cfendack frames as we never send those */ 735 return 3; 736 } 737 738 return 0; 739 } 740 741 void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm) 742 { 743 iwl_mvm_bt_coex_notif_handle(mvm); 744 } 745