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) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 10 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 37 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 68 #include <linux/etherdevice.h> 69 #include <net/mac80211.h> 70 #include "iwl-io.h" 71 #include "iwl-prph.h" 72 #include "fw-api.h" 73 #include "mvm.h" 74 #include "time-event.h" 75 #include "fw-dbg.h" 76 77 const u8 iwl_mvm_ac_to_tx_fifo[] = { 78 IWL_MVM_TX_FIFO_VO, 79 IWL_MVM_TX_FIFO_VI, 80 IWL_MVM_TX_FIFO_BE, 81 IWL_MVM_TX_FIFO_BK, 82 }; 83 84 struct iwl_mvm_mac_iface_iterator_data { 85 struct iwl_mvm *mvm; 86 struct ieee80211_vif *vif; 87 unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)]; 88 unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)]; 89 enum iwl_tsf_id preferred_tsf; 90 bool found_vif; 91 }; 92 93 struct iwl_mvm_hw_queues_iface_iterator_data { 94 struct ieee80211_vif *exclude_vif; 95 unsigned long used_hw_queues; 96 }; 97 98 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac, 99 struct ieee80211_vif *vif) 100 { 101 struct iwl_mvm_mac_iface_iterator_data *data = _data; 102 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 103 u16 min_bi; 104 105 /* Skip the interface for which we are trying to assign a tsf_id */ 106 if (vif == data->vif) 107 return; 108 109 /* 110 * The TSF is a hardware/firmware resource, there are 4 and 111 * the driver should assign and free them as needed. However, 112 * there are cases where 2 MACs should share the same TSF ID 113 * for the purpose of clock sync, an optimization to avoid 114 * clock drift causing overlapping TBTTs/DTIMs for a GO and 115 * client in the system. 116 * 117 * The firmware will decide according to the MAC type which 118 * will be the master and slave. Clients that need to sync 119 * with a remote station will be the master, and an AP or GO 120 * will be the slave. 121 * 122 * Depending on the new interface type it can be slaved to 123 * or become the master of an existing interface. 124 */ 125 switch (data->vif->type) { 126 case NL80211_IFTYPE_STATION: 127 /* 128 * The new interface is a client, so if the one we're iterating 129 * is an AP, and the beacon interval of the AP is a multiple or 130 * divisor of the beacon interval of the client, the same TSF 131 * should be used to avoid drift between the new client and 132 * existing AP. The existing AP will get drift updates from the 133 * new client context in this case. 134 */ 135 if (vif->type != NL80211_IFTYPE_AP || 136 data->preferred_tsf != NUM_TSF_IDS || 137 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 138 break; 139 140 min_bi = min(data->vif->bss_conf.beacon_int, 141 vif->bss_conf.beacon_int); 142 143 if (!min_bi) 144 break; 145 146 if ((data->vif->bss_conf.beacon_int - 147 vif->bss_conf.beacon_int) % min_bi == 0) { 148 data->preferred_tsf = mvmvif->tsf_id; 149 return; 150 } 151 break; 152 153 case NL80211_IFTYPE_AP: 154 /* 155 * The new interface is AP/GO, so if its beacon interval is a 156 * multiple or a divisor of the beacon interval of an existing 157 * interface, it should get drift updates from an existing 158 * client or use the same TSF as an existing GO. There's no 159 * drift between TSFs internally but if they used different 160 * TSFs then a new client MAC could update one of them and 161 * cause drift that way. 162 */ 163 if ((vif->type != NL80211_IFTYPE_AP && 164 vif->type != NL80211_IFTYPE_STATION) || 165 data->preferred_tsf != NUM_TSF_IDS || 166 !test_bit(mvmvif->tsf_id, data->available_tsf_ids)) 167 break; 168 169 min_bi = min(data->vif->bss_conf.beacon_int, 170 vif->bss_conf.beacon_int); 171 172 if (!min_bi) 173 break; 174 175 if ((data->vif->bss_conf.beacon_int - 176 vif->bss_conf.beacon_int) % min_bi == 0) { 177 data->preferred_tsf = mvmvif->tsf_id; 178 return; 179 } 180 break; 181 default: 182 /* 183 * For all other interface types there's no need to 184 * take drift into account. Either they're exclusive 185 * like IBSS and monitor, or we don't care much about 186 * their TSF (like P2P Device), but we won't be able 187 * to share the TSF resource. 188 */ 189 break; 190 } 191 192 /* 193 * Unless we exited above, we can't share the TSF resource 194 * that the virtual interface we're iterating over is using 195 * with the new one, so clear the available bit and if this 196 * was the preferred one, reset that as well. 197 */ 198 __clear_bit(mvmvif->tsf_id, data->available_tsf_ids); 199 200 if (data->preferred_tsf == mvmvif->tsf_id) 201 data->preferred_tsf = NUM_TSF_IDS; 202 } 203 204 /* 205 * Get the mask of the queues used by the vif 206 */ 207 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif) 208 { 209 u32 qmask = 0, ac; 210 211 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) 212 return BIT(IWL_MVM_OFFCHANNEL_QUEUE); 213 214 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 215 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 216 qmask |= BIT(vif->hw_queue[ac]); 217 } 218 219 if (vif->type == NL80211_IFTYPE_AP) 220 qmask |= BIT(vif->cab_queue); 221 222 return qmask; 223 } 224 225 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac, 226 struct ieee80211_vif *vif) 227 { 228 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 229 230 /* exclude the given vif */ 231 if (vif == data->exclude_vif) 232 return; 233 234 data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif); 235 } 236 237 static void iwl_mvm_mac_sta_hw_queues_iter(void *_data, 238 struct ieee80211_sta *sta) 239 { 240 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 241 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 242 243 /* Mark the queues used by the sta */ 244 data->used_hw_queues |= mvmsta->tfd_queue_msk; 245 } 246 247 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm, 248 struct ieee80211_vif *exclude_vif) 249 { 250 u8 sta_id; 251 struct iwl_mvm_hw_queues_iface_iterator_data data = { 252 .exclude_vif = exclude_vif, 253 .used_hw_queues = 254 BIT(IWL_MVM_OFFCHANNEL_QUEUE) | 255 BIT(mvm->aux_queue), 256 }; 257 258 if (iwl_mvm_is_dqa_supported(mvm)) 259 data.used_hw_queues |= BIT(IWL_MVM_DQA_CMD_QUEUE); 260 else 261 data.used_hw_queues |= BIT(IWL_MVM_CMD_QUEUE); 262 263 lockdep_assert_held(&mvm->mutex); 264 265 /* mark all VIF used hw queues */ 266 ieee80211_iterate_active_interfaces_atomic( 267 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 268 iwl_mvm_iface_hw_queues_iter, &data); 269 270 /* don't assign the same hw queues as TDLS stations */ 271 ieee80211_iterate_stations_atomic(mvm->hw, 272 iwl_mvm_mac_sta_hw_queues_iter, 273 &data); 274 275 /* 276 * Some TDLS stations may be removed but are in the process of being 277 * drained. Don't touch their queues. 278 */ 279 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) 280 data.used_hw_queues |= mvm->tfd_drained[sta_id]; 281 282 return data.used_hw_queues; 283 } 284 285 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 286 struct ieee80211_vif *vif) 287 { 288 struct iwl_mvm_mac_iface_iterator_data *data = _data; 289 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 290 291 /* Iterator may already find the interface being added -- skip it */ 292 if (vif == data->vif) { 293 data->found_vif = true; 294 return; 295 } 296 297 /* Mark MAC IDs as used by clearing the available bit, and 298 * (below) mark TSFs as used if their existing use is not 299 * compatible with the new interface type. 300 * No locking or atomic bit operations are needed since the 301 * data is on the stack of the caller function. 302 */ 303 __clear_bit(mvmvif->id, data->available_mac_ids); 304 305 /* find a suitable tsf_id */ 306 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 307 } 308 309 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 310 struct ieee80211_vif *vif) 311 { 312 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 313 struct iwl_mvm_mac_iface_iterator_data data = { 314 .mvm = mvm, 315 .vif = vif, 316 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 317 /* no preference yet */ 318 .preferred_tsf = NUM_TSF_IDS, 319 }; 320 321 ieee80211_iterate_active_interfaces_atomic( 322 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 323 iwl_mvm_mac_tsf_id_iter, &data); 324 325 if (data.preferred_tsf != NUM_TSF_IDS) 326 mvmvif->tsf_id = data.preferred_tsf; 327 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 328 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 329 NUM_TSF_IDS); 330 } 331 332 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm, 333 struct ieee80211_vif *vif) 334 { 335 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 336 struct iwl_mvm_mac_iface_iterator_data data = { 337 .mvm = mvm, 338 .vif = vif, 339 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 340 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 341 /* no preference yet */ 342 .preferred_tsf = NUM_TSF_IDS, 343 .found_vif = false, 344 }; 345 u32 ac; 346 int ret, i; 347 unsigned long used_hw_queues; 348 349 /* 350 * Allocate a MAC ID and a TSF for this MAC, along with the queues 351 * and other resources. 352 */ 353 354 /* 355 * Before the iterator, we start with all MAC IDs and TSFs available. 356 * 357 * During iteration, all MAC IDs are cleared that are in use by other 358 * virtual interfaces, and all TSF IDs are cleared that can't be used 359 * by this new virtual interface because they're used by an interface 360 * that can't share it with the new one. 361 * At the same time, we check if there's a preferred TSF in the case 362 * that we should share it with another interface. 363 */ 364 365 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 366 switch (vif->type) { 367 case NL80211_IFTYPE_ADHOC: 368 break; 369 case NL80211_IFTYPE_STATION: 370 if (!vif->p2p) 371 break; 372 /* fall through */ 373 default: 374 __clear_bit(0, data.available_mac_ids); 375 } 376 377 ieee80211_iterate_active_interfaces_atomic( 378 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 379 iwl_mvm_mac_iface_iterator, &data); 380 381 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif); 382 383 /* 384 * In the case we're getting here during resume, it's similar to 385 * firmware restart, and with RESUME_ALL the iterator will find 386 * the vif being added already. 387 * We don't want to reassign any IDs in either case since doing 388 * so would probably assign different IDs (as interfaces aren't 389 * necessarily added in the same order), but the old IDs were 390 * preserved anyway, so skip ID assignment for both resume and 391 * recovery. 392 */ 393 if (data.found_vif) 394 return 0; 395 396 /* Therefore, in recovery, we can't get here */ 397 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 398 return -EBUSY; 399 400 mvmvif->id = find_first_bit(data.available_mac_ids, 401 NUM_MAC_INDEX_DRIVER); 402 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 403 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 404 ret = -EIO; 405 goto exit_fail; 406 } 407 408 if (data.preferred_tsf != NUM_TSF_IDS) 409 mvmvif->tsf_id = data.preferred_tsf; 410 else 411 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 412 NUM_TSF_IDS); 413 if (mvmvif->tsf_id == NUM_TSF_IDS) { 414 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 415 ret = -EIO; 416 goto exit_fail; 417 } 418 419 mvmvif->color = 0; 420 421 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 422 mvmvif->time_event_data.id = TE_MAX; 423 424 /* No need to allocate data queues to P2P Device MAC.*/ 425 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 426 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 427 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 428 429 return 0; 430 } 431 432 /* 433 * Find available queues, and allocate them to the ACs. When in 434 * DQA-mode they aren't really used, and this is done only so the 435 * mac80211 ieee80211_check_queues() function won't fail 436 */ 437 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 438 u8 queue = find_first_zero_bit(&used_hw_queues, 439 mvm->first_agg_queue); 440 441 if (!iwl_mvm_is_dqa_supported(mvm) && 442 queue >= mvm->first_agg_queue) { 443 IWL_ERR(mvm, "Failed to allocate queue\n"); 444 ret = -EIO; 445 goto exit_fail; 446 } 447 448 __set_bit(queue, &used_hw_queues); 449 vif->hw_queue[ac] = queue; 450 } 451 452 /* Allocate the CAB queue for softAP and GO interfaces */ 453 if (vif->type == NL80211_IFTYPE_AP) { 454 u8 queue; 455 456 if (!iwl_mvm_is_dqa_supported(mvm)) { 457 queue = find_first_zero_bit(&used_hw_queues, 458 mvm->first_agg_queue); 459 460 if (queue >= mvm->first_agg_queue) { 461 IWL_ERR(mvm, "Failed to allocate cab queue\n"); 462 ret = -EIO; 463 goto exit_fail; 464 } 465 } else { 466 queue = IWL_MVM_DQA_GCAST_QUEUE; 467 } 468 469 vif->cab_queue = queue; 470 } else { 471 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 472 } 473 474 mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT; 475 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 476 477 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 478 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 479 480 return 0; 481 482 exit_fail: 483 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 484 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 485 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 486 return ret; 487 } 488 489 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 490 { 491 unsigned int wdg_timeout = 492 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 493 u32 ac; 494 int ret; 495 496 lockdep_assert_held(&mvm->mutex); 497 498 ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); 499 if (ret) 500 return ret; 501 502 /* If DQA is supported - queues will be enabled when needed */ 503 if (iwl_mvm_is_dqa_supported(mvm)) 504 return 0; 505 506 switch (vif->type) { 507 case NL80211_IFTYPE_P2P_DEVICE: 508 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 509 IWL_MVM_OFFCHANNEL_QUEUE, 510 IWL_MVM_TX_FIFO_VO, 0, wdg_timeout); 511 break; 512 case NL80211_IFTYPE_AP: 513 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue, 514 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 515 /* fall through */ 516 default: 517 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 518 iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac], 519 vif->hw_queue[ac], 520 iwl_mvm_ac_to_tx_fifo[ac], 0, 521 wdg_timeout); 522 break; 523 } 524 525 return 0; 526 } 527 528 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 529 { 530 int ac; 531 532 lockdep_assert_held(&mvm->mutex); 533 534 /* 535 * If DQA is supported - queues were already disabled, since in 536 * DQA-mode the queues are a property of the STA and not of the 537 * vif, and at this point the STA was already deleted 538 */ 539 if (iwl_mvm_is_dqa_supported(mvm)) 540 return; 541 542 switch (vif->type) { 543 case NL80211_IFTYPE_P2P_DEVICE: 544 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 545 IWL_MVM_OFFCHANNEL_QUEUE, 546 IWL_MAX_TID_COUNT, 0); 547 548 break; 549 case NL80211_IFTYPE_AP: 550 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue, 551 IWL_MAX_TID_COUNT, 0); 552 /* fall through */ 553 default: 554 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 555 iwl_mvm_disable_txq(mvm, vif->hw_queue[ac], 556 vif->hw_queue[ac], 557 IWL_MAX_TID_COUNT, 0); 558 } 559 } 560 561 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 562 struct ieee80211_vif *vif, 563 enum nl80211_band band, 564 u8 *cck_rates, u8 *ofdm_rates) 565 { 566 struct ieee80211_supported_band *sband; 567 unsigned long basic = vif->bss_conf.basic_rates; 568 int lowest_present_ofdm = 100; 569 int lowest_present_cck = 100; 570 u8 cck = 0; 571 u8 ofdm = 0; 572 int i; 573 574 sband = mvm->hw->wiphy->bands[band]; 575 576 for_each_set_bit(i, &basic, BITS_PER_LONG) { 577 int hw = sband->bitrates[i].hw_value; 578 if (hw >= IWL_FIRST_OFDM_RATE) { 579 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 580 if (lowest_present_ofdm > hw) 581 lowest_present_ofdm = hw; 582 } else { 583 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 584 585 cck |= BIT(hw); 586 if (lowest_present_cck > hw) 587 lowest_present_cck = hw; 588 } 589 } 590 591 /* 592 * Now we've got the basic rates as bitmaps in the ofdm and cck 593 * variables. This isn't sufficient though, as there might not 594 * be all the right rates in the bitmap. E.g. if the only basic 595 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 596 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 597 * 598 * [...] a STA responding to a received frame shall transmit 599 * its Control Response frame [...] at the highest rate in the 600 * BSSBasicRateSet parameter that is less than or equal to the 601 * rate of the immediately previous frame in the frame exchange 602 * sequence ([...]) and that is of the same modulation class 603 * ([...]) as the received frame. If no rate contained in the 604 * BSSBasicRateSet parameter meets these conditions, then the 605 * control frame sent in response to a received frame shall be 606 * transmitted at the highest mandatory rate of the PHY that is 607 * less than or equal to the rate of the received frame, and 608 * that is of the same modulation class as the received frame. 609 * 610 * As a consequence, we need to add all mandatory rates that are 611 * lower than all of the basic rates to these bitmaps. 612 */ 613 614 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 615 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 616 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 617 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 618 /* 6M already there or needed so always add */ 619 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 620 621 /* 622 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 623 * Note, however: 624 * - if no CCK rates are basic, it must be ERP since there must 625 * be some basic rates at all, so they're OFDM => ERP PHY 626 * (or we're in 5 GHz, and the cck bitmap will never be used) 627 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 628 * - if 5.5M is basic, 1M and 2M are mandatory 629 * - if 2M is basic, 1M is mandatory 630 * - if 1M is basic, that's the only valid ACK rate. 631 * As a consequence, it's not as complicated as it sounds, just add 632 * any lower rates to the ACK rate bitmap. 633 */ 634 if (IWL_RATE_11M_INDEX < lowest_present_cck) 635 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 636 if (IWL_RATE_5M_INDEX < lowest_present_cck) 637 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 638 if (IWL_RATE_2M_INDEX < lowest_present_cck) 639 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 640 /* 1M already there or needed so always add */ 641 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 642 643 *cck_rates = cck; 644 *ofdm_rates = ofdm; 645 } 646 647 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 648 struct ieee80211_vif *vif, 649 struct iwl_mac_ctx_cmd *cmd) 650 { 651 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 652 u8 protection_mode = vif->bss_conf.ht_operation_mode & 653 IEEE80211_HT_OP_MODE_PROTECTION; 654 /* The fw does not distinguish between ht and fat */ 655 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 656 657 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 658 /* 659 * See section 9.23.3.1 of IEEE 80211-2012. 660 * Nongreenfield HT STAs Present is not supported. 661 */ 662 switch (protection_mode) { 663 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 664 break; 665 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 666 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 667 cmd->protection_flags |= cpu_to_le32(ht_flag); 668 break; 669 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 670 /* Protect when channel wider than 20MHz */ 671 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 672 cmd->protection_flags |= cpu_to_le32(ht_flag); 673 break; 674 default: 675 IWL_ERR(mvm, "Illegal protection mode %d\n", 676 protection_mode); 677 break; 678 } 679 } 680 681 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 682 struct ieee80211_vif *vif, 683 struct iwl_mac_ctx_cmd *cmd, 684 const u8 *bssid_override, 685 u32 action) 686 { 687 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 688 struct ieee80211_chanctx_conf *chanctx; 689 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 690 IEEE80211_HT_OP_MODE_PROTECTION); 691 u8 cck_ack_rates, ofdm_ack_rates; 692 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 693 int i; 694 695 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 696 mvmvif->color)); 697 cmd->action = cpu_to_le32(action); 698 699 switch (vif->type) { 700 case NL80211_IFTYPE_STATION: 701 if (vif->p2p) 702 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 703 else 704 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 705 break; 706 case NL80211_IFTYPE_AP: 707 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 708 break; 709 case NL80211_IFTYPE_MONITOR: 710 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 711 break; 712 case NL80211_IFTYPE_P2P_DEVICE: 713 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 714 break; 715 case NL80211_IFTYPE_ADHOC: 716 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 717 break; 718 default: 719 WARN_ON_ONCE(1); 720 } 721 722 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 723 724 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 725 726 if (bssid) 727 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 728 else 729 eth_broadcast_addr(cmd->bssid_addr); 730 731 rcu_read_lock(); 732 chanctx = rcu_dereference(vif->chanctx_conf); 733 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 734 : NL80211_BAND_2GHZ, 735 &cck_ack_rates, &ofdm_ack_rates); 736 rcu_read_unlock(); 737 738 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 739 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 740 741 cmd->cck_short_preamble = 742 cpu_to_le32(vif->bss_conf.use_short_preamble ? 743 MAC_FLG_SHORT_PREAMBLE : 0); 744 cmd->short_slot = 745 cpu_to_le32(vif->bss_conf.use_short_slot ? 746 MAC_FLG_SHORT_SLOT : 0); 747 748 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 749 750 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 751 u8 txf = iwl_mvm_ac_to_tx_fifo[i]; 752 753 cmd->ac[txf].cw_min = 754 cpu_to_le16(mvmvif->queue_params[i].cw_min); 755 cmd->ac[txf].cw_max = 756 cpu_to_le16(mvmvif->queue_params[i].cw_max); 757 cmd->ac[txf].edca_txop = 758 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 759 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 760 cmd->ac[txf].fifos_mask = BIT(txf); 761 } 762 763 if (vif->bss_conf.qos) 764 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 765 766 if (vif->bss_conf.use_cts_prot) 767 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 768 769 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 770 vif->bss_conf.use_cts_prot, 771 vif->bss_conf.ht_operation_mode); 772 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 773 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 774 if (ht_enabled) 775 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 776 } 777 778 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 779 struct iwl_mac_ctx_cmd *cmd) 780 { 781 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 782 sizeof(*cmd), cmd); 783 if (ret) 784 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 785 le32_to_cpu(cmd->action), ret); 786 return ret; 787 } 788 789 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 790 struct ieee80211_vif *vif, 791 u32 action, bool force_assoc_off, 792 const u8 *bssid_override) 793 { 794 struct iwl_mac_ctx_cmd cmd = {}; 795 struct iwl_mac_data_sta *ctxt_sta; 796 797 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 798 799 /* Fill the common data for all mac context types */ 800 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 801 802 if (vif->p2p) { 803 struct ieee80211_p2p_noa_attr *noa = 804 &vif->bss_conf.p2p_noa_attr; 805 806 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 807 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 808 ctxt_sta = &cmd.p2p_sta.sta; 809 } else { 810 ctxt_sta = &cmd.sta; 811 } 812 813 /* We need the dtim_period to set the MAC as associated */ 814 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 815 !force_assoc_off) { 816 u32 dtim_offs; 817 818 /* 819 * The DTIM count counts down, so when it is N that means N 820 * more beacon intervals happen until the DTIM TBTT. Therefore 821 * add this to the current time. If that ends up being in the 822 * future, the firmware will handle it. 823 * 824 * Also note that the system_timestamp (which we get here as 825 * "sync_device_ts") and TSF timestamp aren't at exactly the 826 * same offset in the frame -- the TSF is at the first symbol 827 * of the TSF, the system timestamp is at signal acquisition 828 * time. This means there's an offset between them of at most 829 * a few hundred microseconds (24 * 8 bits + PLCP time gives 830 * 384us in the longest case), this is currently not relevant 831 * as the firmware wakes up around 2ms before the TBTT. 832 */ 833 dtim_offs = vif->bss_conf.sync_dtim_count * 834 vif->bss_conf.beacon_int; 835 /* convert TU to usecs */ 836 dtim_offs *= 1024; 837 838 ctxt_sta->dtim_tsf = 839 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 840 ctxt_sta->dtim_time = 841 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 842 843 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 844 le64_to_cpu(ctxt_sta->dtim_tsf), 845 le32_to_cpu(ctxt_sta->dtim_time), 846 dtim_offs); 847 848 ctxt_sta->is_assoc = cpu_to_le32(1); 849 } else { 850 ctxt_sta->is_assoc = cpu_to_le32(0); 851 852 /* Allow beacons to pass through as long as we are not 853 * associated, or we do not have dtim period information. 854 */ 855 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 856 } 857 858 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 859 ctxt_sta->bi_reciprocal = 860 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 861 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 862 vif->bss_conf.dtim_period); 863 ctxt_sta->dtim_reciprocal = 864 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 865 vif->bss_conf.dtim_period)); 866 867 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 868 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 869 870 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) 871 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 872 873 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 874 } 875 876 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 877 struct ieee80211_vif *vif, 878 u32 action) 879 { 880 struct iwl_mac_ctx_cmd cmd = {}; 881 u32 tfd_queue_msk = 0; 882 int ret, i; 883 884 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 885 886 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 887 888 if (!iwl_mvm_is_dqa_supported(mvm)) { 889 for (i = 0; i < IEEE80211_NUM_ACS; i++) 890 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 891 tfd_queue_msk |= BIT(vif->hw_queue[i]); 892 } 893 894 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 895 MAC_FILTER_IN_CONTROL_AND_MGMT | 896 MAC_FILTER_IN_BEACON | 897 MAC_FILTER_IN_PROBE_REQUEST | 898 MAC_FILTER_IN_CRC32); 899 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS); 900 901 /* Allocate sniffer station */ 902 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk, 903 vif->type); 904 if (ret) 905 return ret; 906 907 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 908 } 909 910 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 911 struct ieee80211_vif *vif, 912 u32 action) 913 { 914 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 915 struct iwl_mac_ctx_cmd cmd = {}; 916 917 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 918 919 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 920 921 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 922 MAC_FILTER_IN_PROBE_REQUEST); 923 924 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 925 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 926 cmd.ibss.bi_reciprocal = 927 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 928 929 /* TODO: Assumes that the beacon id == mac context id */ 930 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 931 932 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 933 } 934 935 struct iwl_mvm_go_iterator_data { 936 bool go_active; 937 }; 938 939 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 940 { 941 struct iwl_mvm_go_iterator_data *data = _data; 942 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 943 944 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 945 mvmvif->ap_ibss_active) 946 data->go_active = true; 947 } 948 949 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 950 struct ieee80211_vif *vif, 951 u32 action) 952 { 953 struct iwl_mac_ctx_cmd cmd = {}; 954 struct iwl_mvm_go_iterator_data data = {}; 955 956 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 957 958 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 959 960 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 961 962 /* Override the filter flags to accept only probe requests */ 963 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 964 965 /* 966 * This flag should be set to true when the P2P Device is 967 * discoverable and there is at least another active P2P GO. Settings 968 * this flag will allow the P2P Device to be discoverable on other 969 * channels in addition to its listen channel. 970 * Note that this flag should not be set in other cases as it opens the 971 * Rx filters on all MAC and increases the number of interrupts. 972 */ 973 ieee80211_iterate_active_interfaces_atomic( 974 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 975 iwl_mvm_go_iterator, &data); 976 977 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 978 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 979 } 980 981 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 982 __le32 *tim_index, __le32 *tim_size, 983 u8 *beacon, u32 frame_size) 984 { 985 u32 tim_idx; 986 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 987 988 /* The index is relative to frame start but we start looking at the 989 * variable-length part of the beacon. */ 990 tim_idx = mgmt->u.beacon.variable - beacon; 991 992 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 993 while ((tim_idx < (frame_size - 2)) && 994 (beacon[tim_idx] != WLAN_EID_TIM)) 995 tim_idx += beacon[tim_idx+1] + 2; 996 997 /* If TIM field was found, set variables */ 998 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 999 *tim_index = cpu_to_le32(tim_idx); 1000 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]); 1001 } else { 1002 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 1003 } 1004 } 1005 1006 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size) 1007 { 1008 struct ieee80211_mgmt *mgmt = (void *)beacon; 1009 const u8 *ie; 1010 1011 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon))) 1012 return 0; 1013 1014 frame_size -= mgmt->u.beacon.variable - beacon; 1015 1016 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size); 1017 if (!ie) 1018 return 0; 1019 1020 return ie - beacon; 1021 } 1022 1023 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 1024 struct ieee80211_vif *vif, 1025 struct sk_buff *beacon) 1026 { 1027 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1028 struct iwl_host_cmd cmd = { 1029 .id = BEACON_TEMPLATE_CMD, 1030 .flags = CMD_ASYNC, 1031 }; 1032 union { 1033 struct iwl_mac_beacon_cmd_v6 beacon_cmd_v6; 1034 struct iwl_mac_beacon_cmd_v7 beacon_cmd; 1035 } u = {}; 1036 struct iwl_mac_beacon_cmd beacon_cmd; 1037 struct ieee80211_tx_info *info; 1038 u32 beacon_skb_len; 1039 u32 rate, tx_flags; 1040 1041 if (WARN_ON(!beacon)) 1042 return -EINVAL; 1043 1044 beacon_skb_len = beacon->len; 1045 1046 if (fw_has_capa(&mvm->fw->ucode_capa, 1047 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) { 1048 u32 csa_offset, ecsa_offset; 1049 1050 csa_offset = iwl_mvm_find_ie_offset(beacon->data, 1051 WLAN_EID_CHANNEL_SWITCH, 1052 beacon_skb_len); 1053 ecsa_offset = 1054 iwl_mvm_find_ie_offset(beacon->data, 1055 WLAN_EID_EXT_CHANSWITCH_ANN, 1056 beacon_skb_len); 1057 1058 if (iwl_mvm_has_new_tx_api(mvm)) { 1059 beacon_cmd.data.template_id = 1060 cpu_to_le32((u32)mvmvif->id); 1061 beacon_cmd.data.ecsa_offset = cpu_to_le32(ecsa_offset); 1062 beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); 1063 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon_skb_len); 1064 if (vif->type == NL80211_IFTYPE_AP) 1065 iwl_mvm_mac_ctxt_set_tim(mvm, 1066 &beacon_cmd.data.tim_idx, 1067 &beacon_cmd.data.tim_size, 1068 beacon->data, 1069 beacon_skb_len); 1070 cmd.len[0] = sizeof(beacon_cmd); 1071 cmd.data[0] = &beacon_cmd; 1072 goto send; 1073 1074 } else { 1075 u.beacon_cmd.data.ecsa_offset = 1076 cpu_to_le32(ecsa_offset); 1077 u.beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); 1078 cmd.len[0] = sizeof(u.beacon_cmd); 1079 cmd.data[0] = &u; 1080 } 1081 } else { 1082 cmd.len[0] = sizeof(u.beacon_cmd_v6); 1083 cmd.data[0] = &u; 1084 } 1085 1086 /* TODO: for now the beacon template id is set to be the mac context id. 1087 * Might be better to handle it as another resource ... */ 1088 u.beacon_cmd_v6.template_id = cpu_to_le32((u32)mvmvif->id); 1089 info = IEEE80211_SKB_CB(beacon); 1090 1091 /* Set up TX command fields */ 1092 u.beacon_cmd_v6.tx.len = cpu_to_le16((u16)beacon_skb_len); 1093 u.beacon_cmd_v6.tx.sta_id = mvmvif->bcast_sta.sta_id; 1094 u.beacon_cmd_v6.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 1095 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 1096 tx_flags |= 1097 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 1098 TX_CMD_FLG_BT_PRIO_POS; 1099 u.beacon_cmd_v6.tx.tx_flags = cpu_to_le32(tx_flags); 1100 1101 if (!fw_has_capa(&mvm->fw->ucode_capa, 1102 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { 1103 mvm->mgmt_last_antenna_idx = 1104 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 1105 mvm->mgmt_last_antenna_idx); 1106 } 1107 1108 u.beacon_cmd_v6.tx.rate_n_flags = 1109 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 1110 RATE_MCS_ANT_POS); 1111 1112 if (info->band == NL80211_BAND_5GHZ || vif->p2p) { 1113 rate = IWL_FIRST_OFDM_RATE; 1114 } else { 1115 rate = IWL_FIRST_CCK_RATE; 1116 u.beacon_cmd_v6.tx.rate_n_flags |= 1117 cpu_to_le32(RATE_MCS_CCK_MSK); 1118 } 1119 u.beacon_cmd_v6.tx.rate_n_flags |= 1120 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 1121 1122 /* Set up TX beacon command fields */ 1123 if (vif->type == NL80211_IFTYPE_AP) 1124 iwl_mvm_mac_ctxt_set_tim(mvm, &u.beacon_cmd_v6.tim_idx, 1125 &u.beacon_cmd_v6.tim_size, 1126 beacon->data, 1127 beacon_skb_len); 1128 1129 send: 1130 /* Submit command */ 1131 cmd.dataflags[0] = 0; 1132 cmd.len[1] = beacon_skb_len; 1133 cmd.data[1] = beacon->data; 1134 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 1135 1136 return iwl_mvm_send_cmd(mvm, &cmd); 1137 } 1138 1139 /* The beacon template for the AP/GO/IBSS has changed and needs update */ 1140 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1141 struct ieee80211_vif *vif) 1142 { 1143 struct sk_buff *beacon; 1144 int ret; 1145 1146 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1147 vif->type != NL80211_IFTYPE_ADHOC); 1148 1149 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1150 if (!beacon) 1151 return -ENOMEM; 1152 1153 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1154 dev_kfree_skb(beacon); 1155 return ret; 1156 } 1157 1158 struct iwl_mvm_mac_ap_iterator_data { 1159 struct iwl_mvm *mvm; 1160 struct ieee80211_vif *vif; 1161 u32 beacon_device_ts; 1162 u16 beacon_int; 1163 }; 1164 1165 /* Find the beacon_device_ts and beacon_int for a managed interface */ 1166 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1167 struct ieee80211_vif *vif) 1168 { 1169 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1170 1171 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1172 return; 1173 1174 /* Station client has higher priority over P2P client*/ 1175 if (vif->p2p && data->beacon_device_ts) 1176 return; 1177 1178 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1179 data->beacon_int = vif->bss_conf.beacon_int; 1180 } 1181 1182 /* 1183 * Fill the specific data for mac context of type AP of P2P GO 1184 */ 1185 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1186 struct ieee80211_vif *vif, 1187 struct iwl_mac_ctx_cmd *cmd, 1188 struct iwl_mac_data_ap *ctxt_ap, 1189 bool add) 1190 { 1191 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1192 struct iwl_mvm_mac_ap_iterator_data data = { 1193 .mvm = mvm, 1194 .vif = vif, 1195 .beacon_device_ts = 0 1196 }; 1197 1198 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 1199 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST); 1200 1201 /* 1202 * in AP mode, pass probe requests and beacons from other APs 1203 * (needed for ht protection); when there're no any associated 1204 * station don't ask FW to pass beacons to prevent unnecessary 1205 * wake-ups. 1206 */ 1207 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 1208 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) { 1209 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 1210 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n"); 1211 } else { 1212 IWL_DEBUG_HC(mvm, "No need to receive beacons\n"); 1213 } 1214 1215 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1216 ctxt_ap->bi_reciprocal = 1217 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1218 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1219 vif->bss_conf.dtim_period); 1220 ctxt_ap->dtim_reciprocal = 1221 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1222 vif->bss_conf.dtim_period)); 1223 1224 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1225 1226 /* 1227 * Only set the beacon time when the MAC is being added, when we 1228 * just modify the MAC then we should keep the time -- the firmware 1229 * can otherwise have a "jumping" TBTT. 1230 */ 1231 if (add) { 1232 /* 1233 * If there is a station/P2P client interface which is 1234 * associated, set the AP's TBTT far enough from the station's 1235 * TBTT. Otherwise, set it to the current system time 1236 */ 1237 ieee80211_iterate_active_interfaces_atomic( 1238 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1239 iwl_mvm_mac_ap_iterator, &data); 1240 1241 if (data.beacon_device_ts) { 1242 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1243 mvmvif->ap_beacon_time = data.beacon_device_ts + 1244 ieee80211_tu_to_usec(data.beacon_int * rand / 1245 100); 1246 } else { 1247 mvmvif->ap_beacon_time = 1248 iwl_read_prph(mvm->trans, 1249 DEVICE_SYSTEM_TIME_REG); 1250 } 1251 } 1252 1253 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1254 ctxt_ap->beacon_tsf = 0; /* unused */ 1255 1256 /* TODO: Assume that the beacon id == mac context id */ 1257 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1258 } 1259 1260 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1261 struct ieee80211_vif *vif, 1262 u32 action) 1263 { 1264 struct iwl_mac_ctx_cmd cmd = {}; 1265 1266 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1267 1268 /* Fill the common data for all mac context types */ 1269 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1270 1271 /* Fill the data specific for ap mode */ 1272 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap, 1273 action == FW_CTXT_ACTION_ADD); 1274 1275 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1276 } 1277 1278 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1279 struct ieee80211_vif *vif, 1280 u32 action) 1281 { 1282 struct iwl_mac_ctx_cmd cmd = {}; 1283 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1284 1285 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1286 1287 /* Fill the common data for all mac context types */ 1288 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1289 1290 /* Fill the data specific for GO mode */ 1291 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap, 1292 action == FW_CTXT_ACTION_ADD); 1293 1294 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1295 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1296 cmd.go.opp_ps_enabled = 1297 cpu_to_le32(!!(noa->oppps_ctwindow & 1298 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1299 1300 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1301 } 1302 1303 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1304 u32 action, bool force_assoc_off, 1305 const u8 *bssid_override) 1306 { 1307 switch (vif->type) { 1308 case NL80211_IFTYPE_STATION: 1309 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1310 force_assoc_off, 1311 bssid_override); 1312 break; 1313 case NL80211_IFTYPE_AP: 1314 if (!vif->p2p) 1315 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1316 else 1317 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1318 break; 1319 case NL80211_IFTYPE_MONITOR: 1320 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1321 case NL80211_IFTYPE_P2P_DEVICE: 1322 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1323 case NL80211_IFTYPE_ADHOC: 1324 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1325 default: 1326 break; 1327 } 1328 1329 return -EOPNOTSUPP; 1330 } 1331 1332 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1333 { 1334 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1335 int ret; 1336 1337 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1338 vif->addr, ieee80211_vif_type_p2p(vif))) 1339 return -EIO; 1340 1341 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1342 true, NULL); 1343 if (ret) 1344 return ret; 1345 1346 /* will only do anything at resume from D3 time */ 1347 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1348 1349 mvmvif->uploaded = true; 1350 return 0; 1351 } 1352 1353 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1354 bool force_assoc_off, const u8 *bssid_override) 1355 { 1356 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1357 1358 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1359 vif->addr, ieee80211_vif_type_p2p(vif))) 1360 return -EIO; 1361 1362 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1363 force_assoc_off, bssid_override); 1364 } 1365 1366 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1367 { 1368 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1369 struct iwl_mac_ctx_cmd cmd; 1370 int ret; 1371 1372 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1373 vif->addr, ieee80211_vif_type_p2p(vif))) 1374 return -EIO; 1375 1376 memset(&cmd, 0, sizeof(cmd)); 1377 1378 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1379 mvmvif->color)); 1380 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1381 1382 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1383 sizeof(cmd), &cmd); 1384 if (ret) { 1385 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1386 return ret; 1387 } 1388 1389 mvmvif->uploaded = false; 1390 1391 if (vif->type == NL80211_IFTYPE_MONITOR) { 1392 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags); 1393 iwl_mvm_dealloc_snif_sta(mvm); 1394 } 1395 1396 return 0; 1397 } 1398 1399 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1400 struct ieee80211_vif *csa_vif, u32 gp2, 1401 bool tx_success) 1402 { 1403 struct iwl_mvm_vif *mvmvif = 1404 iwl_mvm_vif_from_mac80211(csa_vif); 1405 1406 /* Don't start to countdown from a failed beacon */ 1407 if (!tx_success && !mvmvif->csa_countdown) 1408 return; 1409 1410 mvmvif->csa_countdown = true; 1411 1412 if (!ieee80211_csa_is_complete(csa_vif)) { 1413 int c = ieee80211_csa_update_counter(csa_vif); 1414 1415 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1416 if (csa_vif->p2p && 1417 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1418 tx_success) { 1419 u32 rel_time = (c + 1) * 1420 csa_vif->bss_conf.beacon_int - 1421 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1422 u32 apply_time = gp2 + rel_time * 1024; 1423 1424 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1425 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1426 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1427 apply_time); 1428 } 1429 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1430 /* we don't have CSA NoA scheduled yet, switch now */ 1431 ieee80211_csa_finish(csa_vif); 1432 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1433 } 1434 } 1435 1436 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1437 struct iwl_rx_cmd_buffer *rxb) 1438 { 1439 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1440 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1441 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1442 struct ieee80211_vif *csa_vif; 1443 struct ieee80211_vif *tx_blocked_vif; 1444 u16 status; 1445 1446 lockdep_assert_held(&mvm->mutex); 1447 1448 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1449 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1450 1451 status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK; 1452 IWL_DEBUG_RX(mvm, 1453 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1454 status, beacon_notify_hdr->failure_frame, 1455 le64_to_cpu(beacon->tsf), 1456 mvm->ap_last_beacon_gp2, 1457 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1458 1459 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1460 lockdep_is_held(&mvm->mutex)); 1461 if (unlikely(csa_vif && csa_vif->csa_active)) 1462 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1463 (status == TX_STATUS_SUCCESS)); 1464 1465 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1466 lockdep_is_held(&mvm->mutex)); 1467 if (unlikely(tx_blocked_vif)) { 1468 struct iwl_mvm_vif *mvmvif = 1469 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1470 1471 /* 1472 * The channel switch is started and we have blocked the 1473 * stations. If this is the first beacon (the timeout wasn't 1474 * set), set the unblock timeout, otherwise countdown 1475 */ 1476 if (!mvm->csa_tx_block_bcn_timeout) 1477 mvm->csa_tx_block_bcn_timeout = 1478 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1479 else 1480 mvm->csa_tx_block_bcn_timeout--; 1481 1482 /* Check if the timeout is expired, and unblock tx */ 1483 if (mvm->csa_tx_block_bcn_timeout == 0) { 1484 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1485 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1486 } 1487 } 1488 } 1489 1490 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1491 struct ieee80211_vif *vif) 1492 { 1493 struct iwl_missed_beacons_notif *missed_beacons = _data; 1494 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1495 struct iwl_mvm *mvm = mvmvif->mvm; 1496 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1497 struct iwl_fw_dbg_trigger_tlv *trigger; 1498 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1499 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1500 1501 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1502 return; 1503 1504 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); 1505 rx_missed_bcon_since_rx = 1506 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx); 1507 /* 1508 * TODO: the threshold should be adjusted based on latency conditions, 1509 * and/or in case of a CS flow on one of the other AP vifs. 1510 */ 1511 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1512 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1513 ieee80211_beacon_loss(vif); 1514 1515 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, 1516 FW_DBG_TRIGGER_MISSED_BEACONS)) 1517 return; 1518 1519 trigger = iwl_fw_dbg_get_trigger(mvm->fw, 1520 FW_DBG_TRIGGER_MISSED_BEACONS); 1521 bcon_trig = (void *)trigger->data; 1522 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1523 stop_trig_missed_bcon_since_rx = 1524 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1525 1526 /* TODO: implement start trigger */ 1527 1528 if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger)) 1529 return; 1530 1531 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1532 rx_missed_bcon >= stop_trig_missed_bcon) 1533 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL); 1534 } 1535 1536 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1537 struct iwl_rx_cmd_buffer *rxb) 1538 { 1539 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1540 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1541 1542 IWL_DEBUG_INFO(mvm, 1543 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1544 le32_to_cpu(mb->mac_id), 1545 le32_to_cpu(mb->consec_missed_beacons), 1546 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1547 le32_to_cpu(mb->num_recvd_beacons), 1548 le32_to_cpu(mb->num_expected_beacons)); 1549 1550 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1551 IEEE80211_IFACE_ITER_NORMAL, 1552 iwl_mvm_beacon_loss_iterator, 1553 mb); 1554 } 1555 1556 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm, 1557 struct iwl_rx_cmd_buffer *rxb) 1558 { 1559 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1560 struct iwl_stored_beacon_notif *sb = (void *)pkt->data; 1561 struct ieee80211_rx_status rx_status; 1562 struct sk_buff *skb; 1563 u32 size = le32_to_cpu(sb->byte_count); 1564 1565 if (size == 0) 1566 return; 1567 1568 skb = alloc_skb(size, GFP_ATOMIC); 1569 if (!skb) { 1570 IWL_ERR(mvm, "alloc_skb failed\n"); 1571 return; 1572 } 1573 1574 /* update rx_status according to the notification's metadata */ 1575 memset(&rx_status, 0, sizeof(rx_status)); 1576 rx_status.mactime = le64_to_cpu(sb->tsf); 1577 /* TSF as indicated by the firmware is at INA time */ 1578 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START; 1579 rx_status.device_timestamp = le32_to_cpu(sb->system_time); 1580 rx_status.band = 1581 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 1582 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 1583 rx_status.freq = 1584 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel), 1585 rx_status.band); 1586 1587 /* copy the data */ 1588 memcpy(skb_put(skb, size), sb->data, size); 1589 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 1590 1591 /* pass it as regular rx to mac80211 */ 1592 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL); 1593 } 1594 1595 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm, 1596 struct iwl_rx_cmd_buffer *rxb) 1597 { 1598 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1599 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data; 1600 struct ieee80211_vif *csa_vif; 1601 struct iwl_mvm_vif *mvmvif; 1602 int len = iwl_rx_packet_payload_len(pkt); 1603 u32 id_n_color; 1604 1605 if (WARN_ON_ONCE(len < sizeof(*notif))) 1606 return; 1607 1608 rcu_read_lock(); 1609 1610 csa_vif = rcu_dereference(mvm->csa_vif); 1611 if (WARN_ON(!csa_vif || !csa_vif->csa_active)) 1612 goto out_unlock; 1613 1614 id_n_color = le32_to_cpu(notif->id_and_color); 1615 1616 mvmvif = iwl_mvm_vif_from_mac80211(csa_vif); 1617 if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color, 1618 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)", 1619 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color)) 1620 goto out_unlock; 1621 1622 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n"); 1623 1624 queue_delayed_work(system_wq, &mvm->cs_tx_unblock_dwork, 1625 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT * 1626 csa_vif->bss_conf.beacon_int)); 1627 1628 ieee80211_csa_finish(csa_vif); 1629 1630 rcu_read_unlock(); 1631 1632 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1633 1634 return; 1635 1636 out_unlock: 1637 rcu_read_unlock(); 1638 } 1639