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 vif->type == NL80211_IFTYPE_ADHOC) 221 qmask |= BIT(vif->cab_queue); 222 223 return qmask; 224 } 225 226 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac, 227 struct ieee80211_vif *vif) 228 { 229 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 230 231 /* exclude the given vif */ 232 if (vif == data->exclude_vif) 233 return; 234 235 data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif); 236 } 237 238 static void iwl_mvm_mac_sta_hw_queues_iter(void *_data, 239 struct ieee80211_sta *sta) 240 { 241 struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; 242 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 243 244 /* Mark the queues used by the sta */ 245 data->used_hw_queues |= mvmsta->tfd_queue_msk; 246 } 247 248 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm, 249 struct ieee80211_vif *exclude_vif) 250 { 251 u8 sta_id; 252 struct iwl_mvm_hw_queues_iface_iterator_data data = { 253 .exclude_vif = exclude_vif, 254 .used_hw_queues = 255 BIT(IWL_MVM_OFFCHANNEL_QUEUE) | 256 BIT(mvm->aux_queue), 257 }; 258 259 if (iwl_mvm_is_dqa_supported(mvm)) 260 data.used_hw_queues |= BIT(IWL_MVM_DQA_CMD_QUEUE); 261 else 262 data.used_hw_queues |= BIT(IWL_MVM_CMD_QUEUE); 263 264 lockdep_assert_held(&mvm->mutex); 265 266 /* mark all VIF used hw queues */ 267 ieee80211_iterate_active_interfaces_atomic( 268 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 269 iwl_mvm_iface_hw_queues_iter, &data); 270 271 /* don't assign the same hw queues as TDLS stations */ 272 ieee80211_iterate_stations_atomic(mvm->hw, 273 iwl_mvm_mac_sta_hw_queues_iter, 274 &data); 275 276 /* 277 * Some TDLS stations may be removed but are in the process of being 278 * drained. Don't touch their queues. 279 */ 280 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) 281 data.used_hw_queues |= mvm->tfd_drained[sta_id]; 282 283 return data.used_hw_queues; 284 } 285 286 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, 287 struct ieee80211_vif *vif) 288 { 289 struct iwl_mvm_mac_iface_iterator_data *data = _data; 290 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 291 292 /* Iterator may already find the interface being added -- skip it */ 293 if (vif == data->vif) { 294 data->found_vif = true; 295 return; 296 } 297 298 /* Mark MAC IDs as used by clearing the available bit, and 299 * (below) mark TSFs as used if their existing use is not 300 * compatible with the new interface type. 301 * No locking or atomic bit operations are needed since the 302 * data is on the stack of the caller function. 303 */ 304 __clear_bit(mvmvif->id, data->available_mac_ids); 305 306 /* find a suitable tsf_id */ 307 iwl_mvm_mac_tsf_id_iter(_data, mac, vif); 308 } 309 310 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm, 311 struct ieee80211_vif *vif) 312 { 313 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 314 struct iwl_mvm_mac_iface_iterator_data data = { 315 .mvm = mvm, 316 .vif = vif, 317 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 318 /* no preference yet */ 319 .preferred_tsf = NUM_TSF_IDS, 320 }; 321 322 ieee80211_iterate_active_interfaces_atomic( 323 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 324 iwl_mvm_mac_tsf_id_iter, &data); 325 326 if (data.preferred_tsf != NUM_TSF_IDS) 327 mvmvif->tsf_id = data.preferred_tsf; 328 else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids)) 329 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 330 NUM_TSF_IDS); 331 } 332 333 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm, 334 struct ieee80211_vif *vif) 335 { 336 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 337 struct iwl_mvm_mac_iface_iterator_data data = { 338 .mvm = mvm, 339 .vif = vif, 340 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, 341 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, 342 /* no preference yet */ 343 .preferred_tsf = NUM_TSF_IDS, 344 .found_vif = false, 345 }; 346 u32 ac; 347 int ret, i; 348 unsigned long used_hw_queues; 349 350 /* 351 * Allocate a MAC ID and a TSF for this MAC, along with the queues 352 * and other resources. 353 */ 354 355 /* 356 * Before the iterator, we start with all MAC IDs and TSFs available. 357 * 358 * During iteration, all MAC IDs are cleared that are in use by other 359 * virtual interfaces, and all TSF IDs are cleared that can't be used 360 * by this new virtual interface because they're used by an interface 361 * that can't share it with the new one. 362 * At the same time, we check if there's a preferred TSF in the case 363 * that we should share it with another interface. 364 */ 365 366 /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ 367 switch (vif->type) { 368 case NL80211_IFTYPE_ADHOC: 369 break; 370 case NL80211_IFTYPE_STATION: 371 if (!vif->p2p) 372 break; 373 /* fall through */ 374 default: 375 __clear_bit(0, data.available_mac_ids); 376 } 377 378 ieee80211_iterate_active_interfaces_atomic( 379 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 380 iwl_mvm_mac_iface_iterator, &data); 381 382 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif); 383 384 /* 385 * In the case we're getting here during resume, it's similar to 386 * firmware restart, and with RESUME_ALL the iterator will find 387 * the vif being added already. 388 * We don't want to reassign any IDs in either case since doing 389 * so would probably assign different IDs (as interfaces aren't 390 * necessarily added in the same order), but the old IDs were 391 * preserved anyway, so skip ID assignment for both resume and 392 * recovery. 393 */ 394 if (data.found_vif) 395 return 0; 396 397 /* Therefore, in recovery, we can't get here */ 398 if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) 399 return -EBUSY; 400 401 mvmvif->id = find_first_bit(data.available_mac_ids, 402 NUM_MAC_INDEX_DRIVER); 403 if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { 404 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); 405 ret = -EIO; 406 goto exit_fail; 407 } 408 409 if (data.preferred_tsf != NUM_TSF_IDS) 410 mvmvif->tsf_id = data.preferred_tsf; 411 else 412 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, 413 NUM_TSF_IDS); 414 if (mvmvif->tsf_id == NUM_TSF_IDS) { 415 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); 416 ret = -EIO; 417 goto exit_fail; 418 } 419 420 mvmvif->color = 0; 421 422 INIT_LIST_HEAD(&mvmvif->time_event_data.list); 423 mvmvif->time_event_data.id = TE_MAX; 424 425 /* No need to allocate data queues to P2P Device MAC.*/ 426 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 427 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 428 vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; 429 430 return 0; 431 } 432 433 /* 434 * Find available queues, and allocate them to the ACs. When in 435 * DQA-mode they aren't really used, and this is done only so the 436 * mac80211 ieee80211_check_queues() function won't fail 437 */ 438 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 439 u8 queue = find_first_zero_bit(&used_hw_queues, 440 mvm->first_agg_queue); 441 442 if (!iwl_mvm_is_dqa_supported(mvm) && 443 queue >= mvm->first_agg_queue) { 444 IWL_ERR(mvm, "Failed to allocate queue\n"); 445 ret = -EIO; 446 goto exit_fail; 447 } 448 449 __set_bit(queue, &used_hw_queues); 450 vif->hw_queue[ac] = queue; 451 } 452 453 /* Allocate the CAB queue for softAP and GO interfaces */ 454 if (vif->type == NL80211_IFTYPE_AP) { 455 u8 queue; 456 457 if (!iwl_mvm_is_dqa_supported(mvm)) { 458 queue = find_first_zero_bit(&used_hw_queues, 459 mvm->first_agg_queue); 460 461 if (queue >= mvm->first_agg_queue) { 462 IWL_ERR(mvm, "Failed to allocate cab queue\n"); 463 ret = -EIO; 464 goto exit_fail; 465 } 466 } else { 467 queue = IWL_MVM_DQA_GCAST_QUEUE; 468 } 469 470 vif->cab_queue = queue; 471 } else { 472 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 473 } 474 475 mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT; 476 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; 477 478 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 479 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 480 481 return 0; 482 483 exit_fail: 484 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 485 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 486 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 487 return ret; 488 } 489 490 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 491 { 492 unsigned int wdg_timeout = 493 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 494 u32 ac; 495 int ret; 496 497 lockdep_assert_held(&mvm->mutex); 498 499 ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); 500 if (ret) 501 return ret; 502 503 /* If DQA is supported - queues will be enabled when needed */ 504 if (iwl_mvm_is_dqa_supported(mvm)) 505 return 0; 506 507 switch (vif->type) { 508 case NL80211_IFTYPE_P2P_DEVICE: 509 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 510 IWL_MVM_OFFCHANNEL_QUEUE, 511 IWL_MVM_TX_FIFO_VO, 0, wdg_timeout); 512 break; 513 case NL80211_IFTYPE_AP: 514 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue, 515 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 516 /* fall through */ 517 default: 518 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 519 iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac], 520 vif->hw_queue[ac], 521 iwl_mvm_ac_to_tx_fifo[ac], 0, 522 wdg_timeout); 523 break; 524 } 525 526 return 0; 527 } 528 529 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 530 { 531 int ac; 532 533 lockdep_assert_held(&mvm->mutex); 534 535 /* 536 * If DQA is supported - queues were already disabled, since in 537 * DQA-mode the queues are a property of the STA and not of the 538 * vif, and at this point the STA was already deleted 539 */ 540 if (iwl_mvm_is_dqa_supported(mvm)) 541 return; 542 543 switch (vif->type) { 544 case NL80211_IFTYPE_P2P_DEVICE: 545 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 546 IWL_MVM_OFFCHANNEL_QUEUE, 547 IWL_MAX_TID_COUNT, 0); 548 549 break; 550 case NL80211_IFTYPE_AP: 551 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue, 552 IWL_MAX_TID_COUNT, 0); 553 /* fall through */ 554 default: 555 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 556 iwl_mvm_disable_txq(mvm, vif->hw_queue[ac], 557 vif->hw_queue[ac], 558 IWL_MAX_TID_COUNT, 0); 559 } 560 } 561 562 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 563 struct ieee80211_vif *vif, 564 enum nl80211_band band, 565 u8 *cck_rates, u8 *ofdm_rates) 566 { 567 struct ieee80211_supported_band *sband; 568 unsigned long basic = vif->bss_conf.basic_rates; 569 int lowest_present_ofdm = 100; 570 int lowest_present_cck = 100; 571 u8 cck = 0; 572 u8 ofdm = 0; 573 int i; 574 575 sband = mvm->hw->wiphy->bands[band]; 576 577 for_each_set_bit(i, &basic, BITS_PER_LONG) { 578 int hw = sband->bitrates[i].hw_value; 579 if (hw >= IWL_FIRST_OFDM_RATE) { 580 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 581 if (lowest_present_ofdm > hw) 582 lowest_present_ofdm = hw; 583 } else { 584 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 585 586 cck |= BIT(hw); 587 if (lowest_present_cck > hw) 588 lowest_present_cck = hw; 589 } 590 } 591 592 /* 593 * Now we've got the basic rates as bitmaps in the ofdm and cck 594 * variables. This isn't sufficient though, as there might not 595 * be all the right rates in the bitmap. E.g. if the only basic 596 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 597 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 598 * 599 * [...] a STA responding to a received frame shall transmit 600 * its Control Response frame [...] at the highest rate in the 601 * BSSBasicRateSet parameter that is less than or equal to the 602 * rate of the immediately previous frame in the frame exchange 603 * sequence ([...]) and that is of the same modulation class 604 * ([...]) as the received frame. If no rate contained in the 605 * BSSBasicRateSet parameter meets these conditions, then the 606 * control frame sent in response to a received frame shall be 607 * transmitted at the highest mandatory rate of the PHY that is 608 * less than or equal to the rate of the received frame, and 609 * that is of the same modulation class as the received frame. 610 * 611 * As a consequence, we need to add all mandatory rates that are 612 * lower than all of the basic rates to these bitmaps. 613 */ 614 615 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 616 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 617 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 618 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 619 /* 6M already there or needed so always add */ 620 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 621 622 /* 623 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 624 * Note, however: 625 * - if no CCK rates are basic, it must be ERP since there must 626 * be some basic rates at all, so they're OFDM => ERP PHY 627 * (or we're in 5 GHz, and the cck bitmap will never be used) 628 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 629 * - if 5.5M is basic, 1M and 2M are mandatory 630 * - if 2M is basic, 1M is mandatory 631 * - if 1M is basic, that's the only valid ACK rate. 632 * As a consequence, it's not as complicated as it sounds, just add 633 * any lower rates to the ACK rate bitmap. 634 */ 635 if (IWL_RATE_11M_INDEX < lowest_present_cck) 636 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 637 if (IWL_RATE_5M_INDEX < lowest_present_cck) 638 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 639 if (IWL_RATE_2M_INDEX < lowest_present_cck) 640 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 641 /* 1M already there or needed so always add */ 642 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 643 644 *cck_rates = cck; 645 *ofdm_rates = ofdm; 646 } 647 648 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 649 struct ieee80211_vif *vif, 650 struct iwl_mac_ctx_cmd *cmd) 651 { 652 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 653 u8 protection_mode = vif->bss_conf.ht_operation_mode & 654 IEEE80211_HT_OP_MODE_PROTECTION; 655 /* The fw does not distinguish between ht and fat */ 656 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 657 658 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 659 /* 660 * See section 9.23.3.1 of IEEE 80211-2012. 661 * Nongreenfield HT STAs Present is not supported. 662 */ 663 switch (protection_mode) { 664 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 665 break; 666 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 667 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 668 cmd->protection_flags |= cpu_to_le32(ht_flag); 669 break; 670 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 671 /* Protect when channel wider than 20MHz */ 672 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 673 cmd->protection_flags |= cpu_to_le32(ht_flag); 674 break; 675 default: 676 IWL_ERR(mvm, "Illegal protection mode %d\n", 677 protection_mode); 678 break; 679 } 680 } 681 682 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 683 struct ieee80211_vif *vif, 684 struct iwl_mac_ctx_cmd *cmd, 685 const u8 *bssid_override, 686 u32 action) 687 { 688 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 689 struct ieee80211_chanctx_conf *chanctx; 690 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 691 IEEE80211_HT_OP_MODE_PROTECTION); 692 u8 cck_ack_rates, ofdm_ack_rates; 693 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 694 int i; 695 696 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 697 mvmvif->color)); 698 cmd->action = cpu_to_le32(action); 699 700 switch (vif->type) { 701 case NL80211_IFTYPE_STATION: 702 if (vif->p2p) 703 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 704 else 705 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 706 break; 707 case NL80211_IFTYPE_AP: 708 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 709 break; 710 case NL80211_IFTYPE_MONITOR: 711 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 712 break; 713 case NL80211_IFTYPE_P2P_DEVICE: 714 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 715 break; 716 case NL80211_IFTYPE_ADHOC: 717 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 718 break; 719 default: 720 WARN_ON_ONCE(1); 721 } 722 723 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 724 725 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 726 727 if (bssid) 728 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 729 else 730 eth_broadcast_addr(cmd->bssid_addr); 731 732 rcu_read_lock(); 733 chanctx = rcu_dereference(vif->chanctx_conf); 734 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 735 : NL80211_BAND_2GHZ, 736 &cck_ack_rates, &ofdm_ack_rates); 737 rcu_read_unlock(); 738 739 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 740 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 741 742 cmd->cck_short_preamble = 743 cpu_to_le32(vif->bss_conf.use_short_preamble ? 744 MAC_FLG_SHORT_PREAMBLE : 0); 745 cmd->short_slot = 746 cpu_to_le32(vif->bss_conf.use_short_slot ? 747 MAC_FLG_SHORT_SLOT : 0); 748 749 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 750 751 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 752 u8 txf = iwl_mvm_ac_to_tx_fifo[i]; 753 754 cmd->ac[txf].cw_min = 755 cpu_to_le16(mvmvif->queue_params[i].cw_min); 756 cmd->ac[txf].cw_max = 757 cpu_to_le16(mvmvif->queue_params[i].cw_max); 758 cmd->ac[txf].edca_txop = 759 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 760 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 761 cmd->ac[txf].fifos_mask = BIT(txf); 762 } 763 764 if (vif->bss_conf.qos) 765 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 766 767 if (vif->bss_conf.use_cts_prot) 768 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 769 770 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 771 vif->bss_conf.use_cts_prot, 772 vif->bss_conf.ht_operation_mode); 773 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 774 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 775 if (ht_enabled) 776 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 777 } 778 779 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 780 struct iwl_mac_ctx_cmd *cmd) 781 { 782 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 783 sizeof(*cmd), cmd); 784 if (ret) 785 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 786 le32_to_cpu(cmd->action), ret); 787 return ret; 788 } 789 790 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 791 struct ieee80211_vif *vif, 792 u32 action, bool force_assoc_off, 793 const u8 *bssid_override) 794 { 795 struct iwl_mac_ctx_cmd cmd = {}; 796 struct iwl_mac_data_sta *ctxt_sta; 797 798 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 799 800 /* Fill the common data for all mac context types */ 801 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 802 803 if (vif->p2p) { 804 struct ieee80211_p2p_noa_attr *noa = 805 &vif->bss_conf.p2p_noa_attr; 806 807 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 808 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 809 ctxt_sta = &cmd.p2p_sta.sta; 810 } else { 811 ctxt_sta = &cmd.sta; 812 } 813 814 /* We need the dtim_period to set the MAC as associated */ 815 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 816 !force_assoc_off) { 817 u32 dtim_offs; 818 819 /* 820 * The DTIM count counts down, so when it is N that means N 821 * more beacon intervals happen until the DTIM TBTT. Therefore 822 * add this to the current time. If that ends up being in the 823 * future, the firmware will handle it. 824 * 825 * Also note that the system_timestamp (which we get here as 826 * "sync_device_ts") and TSF timestamp aren't at exactly the 827 * same offset in the frame -- the TSF is at the first symbol 828 * of the TSF, the system timestamp is at signal acquisition 829 * time. This means there's an offset between them of at most 830 * a few hundred microseconds (24 * 8 bits + PLCP time gives 831 * 384us in the longest case), this is currently not relevant 832 * as the firmware wakes up around 2ms before the TBTT. 833 */ 834 dtim_offs = vif->bss_conf.sync_dtim_count * 835 vif->bss_conf.beacon_int; 836 /* convert TU to usecs */ 837 dtim_offs *= 1024; 838 839 ctxt_sta->dtim_tsf = 840 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 841 ctxt_sta->dtim_time = 842 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 843 844 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 845 le64_to_cpu(ctxt_sta->dtim_tsf), 846 le32_to_cpu(ctxt_sta->dtim_time), 847 dtim_offs); 848 849 ctxt_sta->is_assoc = cpu_to_le32(1); 850 } else { 851 ctxt_sta->is_assoc = cpu_to_le32(0); 852 853 /* Allow beacons to pass through as long as we are not 854 * associated, or we do not have dtim period information. 855 */ 856 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 857 } 858 859 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 860 ctxt_sta->bi_reciprocal = 861 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 862 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 863 vif->bss_conf.dtim_period); 864 ctxt_sta->dtim_reciprocal = 865 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 866 vif->bss_conf.dtim_period)); 867 868 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 869 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 870 871 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) 872 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 873 874 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 875 } 876 877 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 878 struct ieee80211_vif *vif, 879 u32 action) 880 { 881 struct iwl_mac_ctx_cmd cmd = {}; 882 u32 tfd_queue_msk = 0; 883 int ret, i; 884 885 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 886 887 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 888 889 if (!iwl_mvm_is_dqa_supported(mvm)) { 890 for (i = 0; i < IEEE80211_NUM_ACS; i++) 891 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 892 tfd_queue_msk |= BIT(vif->hw_queue[i]); 893 } 894 895 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 896 MAC_FILTER_IN_CONTROL_AND_MGMT | 897 MAC_FILTER_IN_BEACON | 898 MAC_FILTER_IN_PROBE_REQUEST | 899 MAC_FILTER_IN_CRC32); 900 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS); 901 902 /* Allocate sniffer station */ 903 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk, 904 vif->type); 905 if (ret) 906 return ret; 907 908 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 909 } 910 911 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 912 struct ieee80211_vif *vif, 913 u32 action) 914 { 915 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 916 struct iwl_mac_ctx_cmd cmd = {}; 917 918 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 919 920 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 921 922 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 923 MAC_FILTER_IN_PROBE_REQUEST); 924 925 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 926 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 927 cmd.ibss.bi_reciprocal = 928 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 929 930 /* TODO: Assumes that the beacon id == mac context id */ 931 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 932 933 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 934 } 935 936 struct iwl_mvm_go_iterator_data { 937 bool go_active; 938 }; 939 940 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 941 { 942 struct iwl_mvm_go_iterator_data *data = _data; 943 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 944 945 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 946 mvmvif->ap_ibss_active) 947 data->go_active = true; 948 } 949 950 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 951 struct ieee80211_vif *vif, 952 u32 action) 953 { 954 struct iwl_mac_ctx_cmd cmd = {}; 955 struct iwl_mvm_go_iterator_data data = {}; 956 957 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 958 959 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 960 961 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 962 963 /* Override the filter flags to accept only probe requests */ 964 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 965 966 /* 967 * This flag should be set to true when the P2P Device is 968 * discoverable and there is at least another active P2P GO. Settings 969 * this flag will allow the P2P Device to be discoverable on other 970 * channels in addition to its listen channel. 971 * Note that this flag should not be set in other cases as it opens the 972 * Rx filters on all MAC and increases the number of interrupts. 973 */ 974 ieee80211_iterate_active_interfaces_atomic( 975 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 976 iwl_mvm_go_iterator, &data); 977 978 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 979 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 980 } 981 982 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 983 __le32 *tim_index, __le32 *tim_size, 984 u8 *beacon, u32 frame_size) 985 { 986 u32 tim_idx; 987 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 988 989 /* The index is relative to frame start but we start looking at the 990 * variable-length part of the beacon. */ 991 tim_idx = mgmt->u.beacon.variable - beacon; 992 993 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 994 while ((tim_idx < (frame_size - 2)) && 995 (beacon[tim_idx] != WLAN_EID_TIM)) 996 tim_idx += beacon[tim_idx+1] + 2; 997 998 /* If TIM field was found, set variables */ 999 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 1000 *tim_index = cpu_to_le32(tim_idx); 1001 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]); 1002 } else { 1003 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 1004 } 1005 } 1006 1007 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size) 1008 { 1009 struct ieee80211_mgmt *mgmt = (void *)beacon; 1010 const u8 *ie; 1011 1012 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon))) 1013 return 0; 1014 1015 frame_size -= mgmt->u.beacon.variable - beacon; 1016 1017 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size); 1018 if (!ie) 1019 return 0; 1020 1021 return ie - beacon; 1022 } 1023 1024 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 1025 struct ieee80211_vif *vif, 1026 struct sk_buff *beacon) 1027 { 1028 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1029 struct iwl_host_cmd cmd = { 1030 .id = BEACON_TEMPLATE_CMD, 1031 .flags = CMD_ASYNC, 1032 }; 1033 union { 1034 struct iwl_mac_beacon_cmd_v6 beacon_cmd_v6; 1035 struct iwl_mac_beacon_cmd_v7 beacon_cmd; 1036 } u = {}; 1037 struct iwl_mac_beacon_cmd beacon_cmd; 1038 struct ieee80211_tx_info *info; 1039 u32 beacon_skb_len; 1040 u32 rate, tx_flags; 1041 1042 if (WARN_ON(!beacon)) 1043 return -EINVAL; 1044 1045 beacon_skb_len = beacon->len; 1046 1047 if (fw_has_capa(&mvm->fw->ucode_capa, 1048 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) { 1049 u32 csa_offset, ecsa_offset; 1050 1051 csa_offset = iwl_mvm_find_ie_offset(beacon->data, 1052 WLAN_EID_CHANNEL_SWITCH, 1053 beacon_skb_len); 1054 ecsa_offset = 1055 iwl_mvm_find_ie_offset(beacon->data, 1056 WLAN_EID_EXT_CHANSWITCH_ANN, 1057 beacon_skb_len); 1058 1059 if (iwl_mvm_has_new_tx_api(mvm)) { 1060 beacon_cmd.data.template_id = 1061 cpu_to_le32((u32)mvmvif->id); 1062 beacon_cmd.data.ecsa_offset = cpu_to_le32(ecsa_offset); 1063 beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); 1064 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon_skb_len); 1065 if (vif->type == NL80211_IFTYPE_AP) 1066 iwl_mvm_mac_ctxt_set_tim(mvm, 1067 &beacon_cmd.data.tim_idx, 1068 &beacon_cmd.data.tim_size, 1069 beacon->data, 1070 beacon_skb_len); 1071 cmd.len[0] = sizeof(beacon_cmd); 1072 cmd.data[0] = &beacon_cmd; 1073 goto send; 1074 1075 } else { 1076 u.beacon_cmd.data.ecsa_offset = 1077 cpu_to_le32(ecsa_offset); 1078 u.beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); 1079 cmd.len[0] = sizeof(u.beacon_cmd); 1080 cmd.data[0] = &u; 1081 } 1082 } else { 1083 cmd.len[0] = sizeof(u.beacon_cmd_v6); 1084 cmd.data[0] = &u; 1085 } 1086 1087 /* TODO: for now the beacon template id is set to be the mac context id. 1088 * Might be better to handle it as another resource ... */ 1089 u.beacon_cmd_v6.template_id = cpu_to_le32((u32)mvmvif->id); 1090 info = IEEE80211_SKB_CB(beacon); 1091 1092 /* Set up TX command fields */ 1093 u.beacon_cmd_v6.tx.len = cpu_to_le16((u16)beacon_skb_len); 1094 u.beacon_cmd_v6.tx.sta_id = mvmvif->bcast_sta.sta_id; 1095 u.beacon_cmd_v6.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 1096 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 1097 tx_flags |= 1098 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 1099 TX_CMD_FLG_BT_PRIO_POS; 1100 u.beacon_cmd_v6.tx.tx_flags = cpu_to_le32(tx_flags); 1101 1102 if (!fw_has_capa(&mvm->fw->ucode_capa, 1103 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { 1104 mvm->mgmt_last_antenna_idx = 1105 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 1106 mvm->mgmt_last_antenna_idx); 1107 } 1108 1109 u.beacon_cmd_v6.tx.rate_n_flags = 1110 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 1111 RATE_MCS_ANT_POS); 1112 1113 if (info->band == NL80211_BAND_5GHZ || vif->p2p) { 1114 rate = IWL_FIRST_OFDM_RATE; 1115 } else { 1116 rate = IWL_FIRST_CCK_RATE; 1117 u.beacon_cmd_v6.tx.rate_n_flags |= 1118 cpu_to_le32(RATE_MCS_CCK_MSK); 1119 } 1120 u.beacon_cmd_v6.tx.rate_n_flags |= 1121 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 1122 1123 /* Set up TX beacon command fields */ 1124 if (vif->type == NL80211_IFTYPE_AP) 1125 iwl_mvm_mac_ctxt_set_tim(mvm, &u.beacon_cmd_v6.tim_idx, 1126 &u.beacon_cmd_v6.tim_size, 1127 beacon->data, 1128 beacon_skb_len); 1129 1130 send: 1131 /* Submit command */ 1132 cmd.dataflags[0] = 0; 1133 cmd.len[1] = beacon_skb_len; 1134 cmd.data[1] = beacon->data; 1135 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 1136 1137 return iwl_mvm_send_cmd(mvm, &cmd); 1138 } 1139 1140 /* The beacon template for the AP/GO/IBSS has changed and needs update */ 1141 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1142 struct ieee80211_vif *vif) 1143 { 1144 struct sk_buff *beacon; 1145 int ret; 1146 1147 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1148 vif->type != NL80211_IFTYPE_ADHOC); 1149 1150 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1151 if (!beacon) 1152 return -ENOMEM; 1153 1154 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1155 dev_kfree_skb(beacon); 1156 return ret; 1157 } 1158 1159 struct iwl_mvm_mac_ap_iterator_data { 1160 struct iwl_mvm *mvm; 1161 struct ieee80211_vif *vif; 1162 u32 beacon_device_ts; 1163 u16 beacon_int; 1164 }; 1165 1166 /* Find the beacon_device_ts and beacon_int for a managed interface */ 1167 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1168 struct ieee80211_vif *vif) 1169 { 1170 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1171 1172 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1173 return; 1174 1175 /* Station client has higher priority over P2P client*/ 1176 if (vif->p2p && data->beacon_device_ts) 1177 return; 1178 1179 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1180 data->beacon_int = vif->bss_conf.beacon_int; 1181 } 1182 1183 /* 1184 * Fill the specific data for mac context of type AP of P2P GO 1185 */ 1186 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1187 struct ieee80211_vif *vif, 1188 struct iwl_mac_ctx_cmd *cmd, 1189 struct iwl_mac_data_ap *ctxt_ap, 1190 bool add) 1191 { 1192 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1193 struct iwl_mvm_mac_ap_iterator_data data = { 1194 .mvm = mvm, 1195 .vif = vif, 1196 .beacon_device_ts = 0 1197 }; 1198 1199 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 1200 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST); 1201 1202 /* 1203 * in AP mode, pass probe requests and beacons from other APs 1204 * (needed for ht protection); when there're no any associated 1205 * station don't ask FW to pass beacons to prevent unnecessary 1206 * wake-ups. 1207 */ 1208 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 1209 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) { 1210 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 1211 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n"); 1212 } else { 1213 IWL_DEBUG_HC(mvm, "No need to receive beacons\n"); 1214 } 1215 1216 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1217 ctxt_ap->bi_reciprocal = 1218 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1219 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1220 vif->bss_conf.dtim_period); 1221 ctxt_ap->dtim_reciprocal = 1222 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1223 vif->bss_conf.dtim_period)); 1224 1225 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1226 1227 /* 1228 * Only set the beacon time when the MAC is being added, when we 1229 * just modify the MAC then we should keep the time -- the firmware 1230 * can otherwise have a "jumping" TBTT. 1231 */ 1232 if (add) { 1233 /* 1234 * If there is a station/P2P client interface which is 1235 * associated, set the AP's TBTT far enough from the station's 1236 * TBTT. Otherwise, set it to the current system time 1237 */ 1238 ieee80211_iterate_active_interfaces_atomic( 1239 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1240 iwl_mvm_mac_ap_iterator, &data); 1241 1242 if (data.beacon_device_ts) { 1243 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1244 mvmvif->ap_beacon_time = data.beacon_device_ts + 1245 ieee80211_tu_to_usec(data.beacon_int * rand / 1246 100); 1247 } else { 1248 mvmvif->ap_beacon_time = 1249 iwl_read_prph(mvm->trans, 1250 DEVICE_SYSTEM_TIME_REG); 1251 } 1252 } 1253 1254 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1255 ctxt_ap->beacon_tsf = 0; /* unused */ 1256 1257 /* TODO: Assume that the beacon id == mac context id */ 1258 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1259 } 1260 1261 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1262 struct ieee80211_vif *vif, 1263 u32 action) 1264 { 1265 struct iwl_mac_ctx_cmd cmd = {}; 1266 1267 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1268 1269 /* Fill the common data for all mac context types */ 1270 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1271 1272 /* Fill the data specific for ap mode */ 1273 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap, 1274 action == FW_CTXT_ACTION_ADD); 1275 1276 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1277 } 1278 1279 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1280 struct ieee80211_vif *vif, 1281 u32 action) 1282 { 1283 struct iwl_mac_ctx_cmd cmd = {}; 1284 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1285 1286 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1287 1288 /* Fill the common data for all mac context types */ 1289 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1290 1291 /* Fill the data specific for GO mode */ 1292 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap, 1293 action == FW_CTXT_ACTION_ADD); 1294 1295 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1296 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1297 cmd.go.opp_ps_enabled = 1298 cpu_to_le32(!!(noa->oppps_ctwindow & 1299 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1300 1301 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1302 } 1303 1304 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1305 u32 action, bool force_assoc_off, 1306 const u8 *bssid_override) 1307 { 1308 switch (vif->type) { 1309 case NL80211_IFTYPE_STATION: 1310 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1311 force_assoc_off, 1312 bssid_override); 1313 break; 1314 case NL80211_IFTYPE_AP: 1315 if (!vif->p2p) 1316 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1317 else 1318 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1319 break; 1320 case NL80211_IFTYPE_MONITOR: 1321 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1322 case NL80211_IFTYPE_P2P_DEVICE: 1323 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1324 case NL80211_IFTYPE_ADHOC: 1325 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1326 default: 1327 break; 1328 } 1329 1330 return -EOPNOTSUPP; 1331 } 1332 1333 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1334 { 1335 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1336 int ret; 1337 1338 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1339 vif->addr, ieee80211_vif_type_p2p(vif))) 1340 return -EIO; 1341 1342 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1343 true, NULL); 1344 if (ret) 1345 return ret; 1346 1347 /* will only do anything at resume from D3 time */ 1348 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1349 1350 mvmvif->uploaded = true; 1351 return 0; 1352 } 1353 1354 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1355 bool force_assoc_off, const u8 *bssid_override) 1356 { 1357 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1358 1359 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1360 vif->addr, ieee80211_vif_type_p2p(vif))) 1361 return -EIO; 1362 1363 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1364 force_assoc_off, bssid_override); 1365 } 1366 1367 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1368 { 1369 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1370 struct iwl_mac_ctx_cmd cmd; 1371 int ret; 1372 1373 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1374 vif->addr, ieee80211_vif_type_p2p(vif))) 1375 return -EIO; 1376 1377 memset(&cmd, 0, sizeof(cmd)); 1378 1379 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1380 mvmvif->color)); 1381 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1382 1383 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1384 sizeof(cmd), &cmd); 1385 if (ret) { 1386 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1387 return ret; 1388 } 1389 1390 mvmvif->uploaded = false; 1391 1392 if (vif->type == NL80211_IFTYPE_MONITOR) { 1393 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags); 1394 iwl_mvm_dealloc_snif_sta(mvm); 1395 } 1396 1397 return 0; 1398 } 1399 1400 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1401 struct ieee80211_vif *csa_vif, u32 gp2, 1402 bool tx_success) 1403 { 1404 struct iwl_mvm_vif *mvmvif = 1405 iwl_mvm_vif_from_mac80211(csa_vif); 1406 1407 /* Don't start to countdown from a failed beacon */ 1408 if (!tx_success && !mvmvif->csa_countdown) 1409 return; 1410 1411 mvmvif->csa_countdown = true; 1412 1413 if (!ieee80211_csa_is_complete(csa_vif)) { 1414 int c = ieee80211_csa_update_counter(csa_vif); 1415 1416 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1417 if (csa_vif->p2p && 1418 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1419 tx_success) { 1420 u32 rel_time = (c + 1) * 1421 csa_vif->bss_conf.beacon_int - 1422 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1423 u32 apply_time = gp2 + rel_time * 1024; 1424 1425 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1426 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1427 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1428 apply_time); 1429 } 1430 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1431 /* we don't have CSA NoA scheduled yet, switch now */ 1432 ieee80211_csa_finish(csa_vif); 1433 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1434 } 1435 } 1436 1437 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1438 struct iwl_rx_cmd_buffer *rxb) 1439 { 1440 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1441 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1442 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1443 struct ieee80211_vif *csa_vif; 1444 struct ieee80211_vif *tx_blocked_vif; 1445 u16 status; 1446 1447 lockdep_assert_held(&mvm->mutex); 1448 1449 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1450 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1451 1452 status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK; 1453 IWL_DEBUG_RX(mvm, 1454 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1455 status, beacon_notify_hdr->failure_frame, 1456 le64_to_cpu(beacon->tsf), 1457 mvm->ap_last_beacon_gp2, 1458 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1459 1460 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1461 lockdep_is_held(&mvm->mutex)); 1462 if (unlikely(csa_vif && csa_vif->csa_active)) 1463 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1464 (status == TX_STATUS_SUCCESS)); 1465 1466 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1467 lockdep_is_held(&mvm->mutex)); 1468 if (unlikely(tx_blocked_vif)) { 1469 struct iwl_mvm_vif *mvmvif = 1470 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1471 1472 /* 1473 * The channel switch is started and we have blocked the 1474 * stations. If this is the first beacon (the timeout wasn't 1475 * set), set the unblock timeout, otherwise countdown 1476 */ 1477 if (!mvm->csa_tx_block_bcn_timeout) 1478 mvm->csa_tx_block_bcn_timeout = 1479 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1480 else 1481 mvm->csa_tx_block_bcn_timeout--; 1482 1483 /* Check if the timeout is expired, and unblock tx */ 1484 if (mvm->csa_tx_block_bcn_timeout == 0) { 1485 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1486 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1487 } 1488 } 1489 } 1490 1491 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1492 struct ieee80211_vif *vif) 1493 { 1494 struct iwl_missed_beacons_notif *missed_beacons = _data; 1495 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1496 struct iwl_mvm *mvm = mvmvif->mvm; 1497 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1498 struct iwl_fw_dbg_trigger_tlv *trigger; 1499 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1500 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1501 1502 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1503 return; 1504 1505 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); 1506 rx_missed_bcon_since_rx = 1507 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx); 1508 /* 1509 * TODO: the threshold should be adjusted based on latency conditions, 1510 * and/or in case of a CS flow on one of the other AP vifs. 1511 */ 1512 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1513 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1514 ieee80211_beacon_loss(vif); 1515 1516 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, 1517 FW_DBG_TRIGGER_MISSED_BEACONS)) 1518 return; 1519 1520 trigger = iwl_fw_dbg_get_trigger(mvm->fw, 1521 FW_DBG_TRIGGER_MISSED_BEACONS); 1522 bcon_trig = (void *)trigger->data; 1523 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1524 stop_trig_missed_bcon_since_rx = 1525 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1526 1527 /* TODO: implement start trigger */ 1528 1529 if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger)) 1530 return; 1531 1532 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1533 rx_missed_bcon >= stop_trig_missed_bcon) 1534 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL); 1535 } 1536 1537 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1538 struct iwl_rx_cmd_buffer *rxb) 1539 { 1540 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1541 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1542 1543 IWL_DEBUG_INFO(mvm, 1544 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1545 le32_to_cpu(mb->mac_id), 1546 le32_to_cpu(mb->consec_missed_beacons), 1547 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1548 le32_to_cpu(mb->num_recvd_beacons), 1549 le32_to_cpu(mb->num_expected_beacons)); 1550 1551 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1552 IEEE80211_IFACE_ITER_NORMAL, 1553 iwl_mvm_beacon_loss_iterator, 1554 mb); 1555 } 1556 1557 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm, 1558 struct iwl_rx_cmd_buffer *rxb) 1559 { 1560 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1561 struct iwl_stored_beacon_notif *sb = (void *)pkt->data; 1562 struct ieee80211_rx_status rx_status; 1563 struct sk_buff *skb; 1564 u32 size = le32_to_cpu(sb->byte_count); 1565 1566 if (size == 0) 1567 return; 1568 1569 skb = alloc_skb(size, GFP_ATOMIC); 1570 if (!skb) { 1571 IWL_ERR(mvm, "alloc_skb failed\n"); 1572 return; 1573 } 1574 1575 /* update rx_status according to the notification's metadata */ 1576 memset(&rx_status, 0, sizeof(rx_status)); 1577 rx_status.mactime = le64_to_cpu(sb->tsf); 1578 /* TSF as indicated by the firmware is at INA time */ 1579 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START; 1580 rx_status.device_timestamp = le32_to_cpu(sb->system_time); 1581 rx_status.band = 1582 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 1583 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 1584 rx_status.freq = 1585 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel), 1586 rx_status.band); 1587 1588 /* copy the data */ 1589 memcpy(skb_put(skb, size), sb->data, size); 1590 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 1591 1592 /* pass it as regular rx to mac80211 */ 1593 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL); 1594 } 1595 1596 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm, 1597 struct iwl_rx_cmd_buffer *rxb) 1598 { 1599 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1600 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data; 1601 struct ieee80211_vif *csa_vif; 1602 struct iwl_mvm_vif *mvmvif; 1603 int len = iwl_rx_packet_payload_len(pkt); 1604 u32 id_n_color; 1605 1606 if (WARN_ON_ONCE(len < sizeof(*notif))) 1607 return; 1608 1609 rcu_read_lock(); 1610 1611 csa_vif = rcu_dereference(mvm->csa_vif); 1612 if (WARN_ON(!csa_vif || !csa_vif->csa_active)) 1613 goto out_unlock; 1614 1615 id_n_color = le32_to_cpu(notif->id_and_color); 1616 1617 mvmvif = iwl_mvm_vif_from_mac80211(csa_vif); 1618 if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color, 1619 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)", 1620 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color)) 1621 goto out_unlock; 1622 1623 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n"); 1624 1625 queue_delayed_work(system_wq, &mvm->cs_tx_unblock_dwork, 1626 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT * 1627 csa_vif->bss_conf.beacon_int)); 1628 1629 ieee80211_csa_finish(csa_vif); 1630 1631 rcu_read_unlock(); 1632 1633 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1634 1635 return; 1636 1637 out_unlock: 1638 rcu_read_unlock(); 1639 } 1640