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 /* 471 * For TVQM this will be overwritten later with the FW assigned 472 * queue value (when queue is enabled). 473 */ 474 mvmvif->cab_queue = queue; 475 vif->cab_queue = queue; 476 } else { 477 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 478 } 479 480 mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA; 481 mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA; 482 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 483 484 for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) 485 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; 486 487 return 0; 488 489 exit_fail: 490 memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 491 memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); 492 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 493 return ret; 494 } 495 496 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 497 { 498 unsigned int wdg_timeout = 499 iwl_mvm_get_wd_timeout(mvm, vif, false, false); 500 u32 ac; 501 int ret; 502 503 lockdep_assert_held(&mvm->mutex); 504 505 ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); 506 if (ret) 507 return ret; 508 509 /* If DQA is supported - queues will be enabled when needed */ 510 if (iwl_mvm_is_dqa_supported(mvm)) 511 return 0; 512 513 switch (vif->type) { 514 case NL80211_IFTYPE_P2P_DEVICE: 515 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 516 IWL_MVM_OFFCHANNEL_QUEUE, 517 IWL_MVM_TX_FIFO_VO, 0, wdg_timeout); 518 break; 519 case NL80211_IFTYPE_AP: 520 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue, 521 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); 522 /* fall through */ 523 default: 524 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 525 iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac], 526 vif->hw_queue[ac], 527 iwl_mvm_ac_to_tx_fifo[ac], 0, 528 wdg_timeout); 529 break; 530 } 531 532 return 0; 533 } 534 535 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 536 { 537 int ac; 538 539 lockdep_assert_held(&mvm->mutex); 540 541 /* 542 * If DQA is supported - queues were already disabled, since in 543 * DQA-mode the queues are a property of the STA and not of the 544 * vif, and at this point the STA was already deleted 545 */ 546 if (iwl_mvm_is_dqa_supported(mvm)) 547 return; 548 549 switch (vif->type) { 550 case NL80211_IFTYPE_P2P_DEVICE: 551 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, 552 IWL_MVM_OFFCHANNEL_QUEUE, 553 IWL_MAX_TID_COUNT, 0); 554 555 break; 556 case NL80211_IFTYPE_AP: 557 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue, 558 IWL_MAX_TID_COUNT, 0); 559 /* fall through */ 560 default: 561 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 562 iwl_mvm_disable_txq(mvm, vif->hw_queue[ac], 563 vif->hw_queue[ac], 564 IWL_MAX_TID_COUNT, 0); 565 } 566 } 567 568 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, 569 struct ieee80211_vif *vif, 570 enum nl80211_band band, 571 u8 *cck_rates, u8 *ofdm_rates) 572 { 573 struct ieee80211_supported_band *sband; 574 unsigned long basic = vif->bss_conf.basic_rates; 575 int lowest_present_ofdm = 100; 576 int lowest_present_cck = 100; 577 u8 cck = 0; 578 u8 ofdm = 0; 579 int i; 580 581 sband = mvm->hw->wiphy->bands[band]; 582 583 for_each_set_bit(i, &basic, BITS_PER_LONG) { 584 int hw = sband->bitrates[i].hw_value; 585 if (hw >= IWL_FIRST_OFDM_RATE) { 586 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 587 if (lowest_present_ofdm > hw) 588 lowest_present_ofdm = hw; 589 } else { 590 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 591 592 cck |= BIT(hw); 593 if (lowest_present_cck > hw) 594 lowest_present_cck = hw; 595 } 596 } 597 598 /* 599 * Now we've got the basic rates as bitmaps in the ofdm and cck 600 * variables. This isn't sufficient though, as there might not 601 * be all the right rates in the bitmap. E.g. if the only basic 602 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 603 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 604 * 605 * [...] a STA responding to a received frame shall transmit 606 * its Control Response frame [...] at the highest rate in the 607 * BSSBasicRateSet parameter that is less than or equal to the 608 * rate of the immediately previous frame in the frame exchange 609 * sequence ([...]) and that is of the same modulation class 610 * ([...]) as the received frame. If no rate contained in the 611 * BSSBasicRateSet parameter meets these conditions, then the 612 * control frame sent in response to a received frame shall be 613 * transmitted at the highest mandatory rate of the PHY that is 614 * less than or equal to the rate of the received frame, and 615 * that is of the same modulation class as the received frame. 616 * 617 * As a consequence, we need to add all mandatory rates that are 618 * lower than all of the basic rates to these bitmaps. 619 */ 620 621 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 622 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; 623 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 624 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; 625 /* 6M already there or needed so always add */ 626 ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; 627 628 /* 629 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 630 * Note, however: 631 * - if no CCK rates are basic, it must be ERP since there must 632 * be some basic rates at all, so they're OFDM => ERP PHY 633 * (or we're in 5 GHz, and the cck bitmap will never be used) 634 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 635 * - if 5.5M is basic, 1M and 2M are mandatory 636 * - if 2M is basic, 1M is mandatory 637 * - if 1M is basic, that's the only valid ACK rate. 638 * As a consequence, it's not as complicated as it sounds, just add 639 * any lower rates to the ACK rate bitmap. 640 */ 641 if (IWL_RATE_11M_INDEX < lowest_present_cck) 642 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; 643 if (IWL_RATE_5M_INDEX < lowest_present_cck) 644 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; 645 if (IWL_RATE_2M_INDEX < lowest_present_cck) 646 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; 647 /* 1M already there or needed so always add */ 648 cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; 649 650 *cck_rates = cck; 651 *ofdm_rates = ofdm; 652 } 653 654 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, 655 struct ieee80211_vif *vif, 656 struct iwl_mac_ctx_cmd *cmd) 657 { 658 /* for both sta and ap, ht_operation_mode hold the protection_mode */ 659 u8 protection_mode = vif->bss_conf.ht_operation_mode & 660 IEEE80211_HT_OP_MODE_PROTECTION; 661 /* The fw does not distinguish between ht and fat */ 662 u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; 663 664 IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); 665 /* 666 * See section 9.23.3.1 of IEEE 80211-2012. 667 * Nongreenfield HT STAs Present is not supported. 668 */ 669 switch (protection_mode) { 670 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 671 break; 672 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 673 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 674 cmd->protection_flags |= cpu_to_le32(ht_flag); 675 break; 676 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 677 /* Protect when channel wider than 20MHz */ 678 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) 679 cmd->protection_flags |= cpu_to_le32(ht_flag); 680 break; 681 default: 682 IWL_ERR(mvm, "Illegal protection mode %d\n", 683 protection_mode); 684 break; 685 } 686 } 687 688 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, 689 struct ieee80211_vif *vif, 690 struct iwl_mac_ctx_cmd *cmd, 691 const u8 *bssid_override, 692 u32 action) 693 { 694 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 695 struct ieee80211_chanctx_conf *chanctx; 696 bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & 697 IEEE80211_HT_OP_MODE_PROTECTION); 698 u8 cck_ack_rates, ofdm_ack_rates; 699 const u8 *bssid = bssid_override ?: vif->bss_conf.bssid; 700 int i; 701 702 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 703 mvmvif->color)); 704 cmd->action = cpu_to_le32(action); 705 706 switch (vif->type) { 707 case NL80211_IFTYPE_STATION: 708 if (vif->p2p) 709 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); 710 else 711 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); 712 break; 713 case NL80211_IFTYPE_AP: 714 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); 715 break; 716 case NL80211_IFTYPE_MONITOR: 717 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); 718 break; 719 case NL80211_IFTYPE_P2P_DEVICE: 720 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); 721 break; 722 case NL80211_IFTYPE_ADHOC: 723 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); 724 break; 725 default: 726 WARN_ON_ONCE(1); 727 } 728 729 cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); 730 731 memcpy(cmd->node_addr, vif->addr, ETH_ALEN); 732 733 if (bssid) 734 memcpy(cmd->bssid_addr, bssid, ETH_ALEN); 735 else 736 eth_broadcast_addr(cmd->bssid_addr); 737 738 rcu_read_lock(); 739 chanctx = rcu_dereference(vif->chanctx_conf); 740 iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band 741 : NL80211_BAND_2GHZ, 742 &cck_ack_rates, &ofdm_ack_rates); 743 rcu_read_unlock(); 744 745 cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); 746 cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); 747 748 cmd->cck_short_preamble = 749 cpu_to_le32(vif->bss_conf.use_short_preamble ? 750 MAC_FLG_SHORT_PREAMBLE : 0); 751 cmd->short_slot = 752 cpu_to_le32(vif->bss_conf.use_short_slot ? 753 MAC_FLG_SHORT_SLOT : 0); 754 755 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); 756 757 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 758 u8 txf = iwl_mvm_ac_to_tx_fifo[i]; 759 760 cmd->ac[txf].cw_min = 761 cpu_to_le16(mvmvif->queue_params[i].cw_min); 762 cmd->ac[txf].cw_max = 763 cpu_to_le16(mvmvif->queue_params[i].cw_max); 764 cmd->ac[txf].edca_txop = 765 cpu_to_le16(mvmvif->queue_params[i].txop * 32); 766 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; 767 cmd->ac[txf].fifos_mask = BIT(txf); 768 } 769 770 if (vif->bss_conf.qos) 771 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); 772 773 if (vif->bss_conf.use_cts_prot) 774 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 775 776 IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", 777 vif->bss_conf.use_cts_prot, 778 vif->bss_conf.ht_operation_mode); 779 if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) 780 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); 781 if (ht_enabled) 782 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); 783 } 784 785 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, 786 struct iwl_mac_ctx_cmd *cmd) 787 { 788 int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 789 sizeof(*cmd), cmd); 790 if (ret) 791 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", 792 le32_to_cpu(cmd->action), ret); 793 return ret; 794 } 795 796 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm, 797 struct ieee80211_vif *vif, 798 u32 action, bool force_assoc_off, 799 const u8 *bssid_override) 800 { 801 struct iwl_mac_ctx_cmd cmd = {}; 802 struct iwl_mac_data_sta *ctxt_sta; 803 804 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 805 806 /* Fill the common data for all mac context types */ 807 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action); 808 809 if (vif->p2p) { 810 struct ieee80211_p2p_noa_attr *noa = 811 &vif->bss_conf.p2p_noa_attr; 812 813 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & 814 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 815 ctxt_sta = &cmd.p2p_sta.sta; 816 } else { 817 ctxt_sta = &cmd.sta; 818 } 819 820 /* We need the dtim_period to set the MAC as associated */ 821 if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && 822 !force_assoc_off) { 823 u32 dtim_offs; 824 825 /* 826 * The DTIM count counts down, so when it is N that means N 827 * more beacon intervals happen until the DTIM TBTT. Therefore 828 * add this to the current time. If that ends up being in the 829 * future, the firmware will handle it. 830 * 831 * Also note that the system_timestamp (which we get here as 832 * "sync_device_ts") and TSF timestamp aren't at exactly the 833 * same offset in the frame -- the TSF is at the first symbol 834 * of the TSF, the system timestamp is at signal acquisition 835 * time. This means there's an offset between them of at most 836 * a few hundred microseconds (24 * 8 bits + PLCP time gives 837 * 384us in the longest case), this is currently not relevant 838 * as the firmware wakes up around 2ms before the TBTT. 839 */ 840 dtim_offs = vif->bss_conf.sync_dtim_count * 841 vif->bss_conf.beacon_int; 842 /* convert TU to usecs */ 843 dtim_offs *= 1024; 844 845 ctxt_sta->dtim_tsf = 846 cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); 847 ctxt_sta->dtim_time = 848 cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); 849 850 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", 851 le64_to_cpu(ctxt_sta->dtim_tsf), 852 le32_to_cpu(ctxt_sta->dtim_time), 853 dtim_offs); 854 855 ctxt_sta->is_assoc = cpu_to_le32(1); 856 } else { 857 ctxt_sta->is_assoc = cpu_to_le32(0); 858 859 /* Allow beacons to pass through as long as we are not 860 * associated, or we do not have dtim period information. 861 */ 862 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 863 } 864 865 ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); 866 ctxt_sta->bi_reciprocal = 867 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 868 ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 869 vif->bss_conf.dtim_period); 870 ctxt_sta->dtim_reciprocal = 871 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 872 vif->bss_conf.dtim_period)); 873 874 ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); 875 ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); 876 877 if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) 878 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 879 880 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 881 } 882 883 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, 884 struct ieee80211_vif *vif, 885 u32 action) 886 { 887 struct iwl_mac_ctx_cmd cmd = {}; 888 u32 tfd_queue_msk = 0; 889 int ret, i; 890 891 WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); 892 893 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 894 895 if (!iwl_mvm_is_dqa_supported(mvm)) { 896 for (i = 0; i < IEEE80211_NUM_ACS; i++) 897 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) 898 tfd_queue_msk |= BIT(vif->hw_queue[i]); 899 } 900 901 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | 902 MAC_FILTER_IN_CONTROL_AND_MGMT | 903 MAC_FILTER_IN_BEACON | 904 MAC_FILTER_IN_PROBE_REQUEST | 905 MAC_FILTER_IN_CRC32); 906 ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS); 907 908 /* Allocate sniffer station */ 909 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk, 910 vif->type, IWL_STA_GENERAL_PURPOSE); 911 if (ret) 912 return ret; 913 914 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 915 } 916 917 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, 918 struct ieee80211_vif *vif, 919 u32 action) 920 { 921 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 922 struct iwl_mac_ctx_cmd cmd = {}; 923 924 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 925 926 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 927 928 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | 929 MAC_FILTER_IN_PROBE_REQUEST); 930 931 /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ 932 cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); 933 cmd.ibss.bi_reciprocal = 934 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 935 936 /* TODO: Assumes that the beacon id == mac context id */ 937 cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); 938 939 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 940 } 941 942 struct iwl_mvm_go_iterator_data { 943 bool go_active; 944 }; 945 946 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 947 { 948 struct iwl_mvm_go_iterator_data *data = _data; 949 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 950 951 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 952 mvmvif->ap_ibss_active) 953 data->go_active = true; 954 } 955 956 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, 957 struct ieee80211_vif *vif, 958 u32 action) 959 { 960 struct iwl_mac_ctx_cmd cmd = {}; 961 struct iwl_mvm_go_iterator_data data = {}; 962 963 WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); 964 965 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 966 967 cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); 968 969 /* Override the filter flags to accept only probe requests */ 970 cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 971 972 /* 973 * This flag should be set to true when the P2P Device is 974 * discoverable and there is at least another active P2P GO. Settings 975 * this flag will allow the P2P Device to be discoverable on other 976 * channels in addition to its listen channel. 977 * Note that this flag should not be set in other cases as it opens the 978 * Rx filters on all MAC and increases the number of interrupts. 979 */ 980 ieee80211_iterate_active_interfaces_atomic( 981 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 982 iwl_mvm_go_iterator, &data); 983 984 cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); 985 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 986 } 987 988 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, 989 __le32 *tim_index, __le32 *tim_size, 990 u8 *beacon, u32 frame_size) 991 { 992 u32 tim_idx; 993 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; 994 995 /* The index is relative to frame start but we start looking at the 996 * variable-length part of the beacon. */ 997 tim_idx = mgmt->u.beacon.variable - beacon; 998 999 /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ 1000 while ((tim_idx < (frame_size - 2)) && 1001 (beacon[tim_idx] != WLAN_EID_TIM)) 1002 tim_idx += beacon[tim_idx+1] + 2; 1003 1004 /* If TIM field was found, set variables */ 1005 if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { 1006 *tim_index = cpu_to_le32(tim_idx); 1007 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]); 1008 } else { 1009 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); 1010 } 1011 } 1012 1013 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size) 1014 { 1015 struct ieee80211_mgmt *mgmt = (void *)beacon; 1016 const u8 *ie; 1017 1018 if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon))) 1019 return 0; 1020 1021 frame_size -= mgmt->u.beacon.variable - beacon; 1022 1023 ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size); 1024 if (!ie) 1025 return 0; 1026 1027 return ie - beacon; 1028 } 1029 1030 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, 1031 struct ieee80211_vif *vif, 1032 struct sk_buff *beacon) 1033 { 1034 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1035 struct iwl_host_cmd cmd = { 1036 .id = BEACON_TEMPLATE_CMD, 1037 .flags = CMD_ASYNC, 1038 }; 1039 union { 1040 struct iwl_mac_beacon_cmd_v6 beacon_cmd_v6; 1041 struct iwl_mac_beacon_cmd_v7 beacon_cmd; 1042 } u = {}; 1043 struct iwl_mac_beacon_cmd beacon_cmd; 1044 struct ieee80211_tx_info *info; 1045 u32 beacon_skb_len; 1046 u32 rate, tx_flags; 1047 1048 if (WARN_ON(!beacon)) 1049 return -EINVAL; 1050 1051 beacon_skb_len = beacon->len; 1052 1053 if (fw_has_capa(&mvm->fw->ucode_capa, 1054 IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) { 1055 u32 csa_offset, ecsa_offset; 1056 1057 csa_offset = iwl_mvm_find_ie_offset(beacon->data, 1058 WLAN_EID_CHANNEL_SWITCH, 1059 beacon_skb_len); 1060 ecsa_offset = 1061 iwl_mvm_find_ie_offset(beacon->data, 1062 WLAN_EID_EXT_CHANSWITCH_ANN, 1063 beacon_skb_len); 1064 1065 if (iwl_mvm_has_new_tx_api(mvm)) { 1066 beacon_cmd.data.template_id = 1067 cpu_to_le32((u32)mvmvif->id); 1068 beacon_cmd.data.ecsa_offset = cpu_to_le32(ecsa_offset); 1069 beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); 1070 beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon_skb_len); 1071 if (vif->type == NL80211_IFTYPE_AP) 1072 iwl_mvm_mac_ctxt_set_tim(mvm, 1073 &beacon_cmd.data.tim_idx, 1074 &beacon_cmd.data.tim_size, 1075 beacon->data, 1076 beacon_skb_len); 1077 cmd.len[0] = sizeof(beacon_cmd); 1078 cmd.data[0] = &beacon_cmd; 1079 goto send; 1080 1081 } else { 1082 u.beacon_cmd.data.ecsa_offset = 1083 cpu_to_le32(ecsa_offset); 1084 u.beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); 1085 cmd.len[0] = sizeof(u.beacon_cmd); 1086 cmd.data[0] = &u; 1087 } 1088 } else { 1089 cmd.len[0] = sizeof(u.beacon_cmd_v6); 1090 cmd.data[0] = &u; 1091 } 1092 1093 /* TODO: for now the beacon template id is set to be the mac context id. 1094 * Might be better to handle it as another resource ... */ 1095 u.beacon_cmd_v6.template_id = cpu_to_le32((u32)mvmvif->id); 1096 info = IEEE80211_SKB_CB(beacon); 1097 1098 /* Set up TX command fields */ 1099 u.beacon_cmd_v6.tx.len = cpu_to_le16((u16)beacon_skb_len); 1100 u.beacon_cmd_v6.tx.sta_id = mvmvif->bcast_sta.sta_id; 1101 u.beacon_cmd_v6.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); 1102 tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; 1103 tx_flags |= 1104 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << 1105 TX_CMD_FLG_BT_PRIO_POS; 1106 u.beacon_cmd_v6.tx.tx_flags = cpu_to_le32(tx_flags); 1107 1108 if (!fw_has_capa(&mvm->fw->ucode_capa, 1109 IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { 1110 mvm->mgmt_last_antenna_idx = 1111 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 1112 mvm->mgmt_last_antenna_idx); 1113 } 1114 1115 u.beacon_cmd_v6.tx.rate_n_flags = 1116 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << 1117 RATE_MCS_ANT_POS); 1118 1119 if (info->band == NL80211_BAND_5GHZ || vif->p2p) { 1120 rate = IWL_FIRST_OFDM_RATE; 1121 } else { 1122 rate = IWL_FIRST_CCK_RATE; 1123 u.beacon_cmd_v6.tx.rate_n_flags |= 1124 cpu_to_le32(RATE_MCS_CCK_MSK); 1125 } 1126 u.beacon_cmd_v6.tx.rate_n_flags |= 1127 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); 1128 1129 /* Set up TX beacon command fields */ 1130 if (vif->type == NL80211_IFTYPE_AP) 1131 iwl_mvm_mac_ctxt_set_tim(mvm, &u.beacon_cmd_v6.tim_idx, 1132 &u.beacon_cmd_v6.tim_size, 1133 beacon->data, 1134 beacon_skb_len); 1135 1136 send: 1137 /* Submit command */ 1138 cmd.dataflags[0] = 0; 1139 cmd.len[1] = beacon_skb_len; 1140 cmd.data[1] = beacon->data; 1141 cmd.dataflags[1] = IWL_HCMD_DFL_DUP; 1142 1143 return iwl_mvm_send_cmd(mvm, &cmd); 1144 } 1145 1146 /* The beacon template for the AP/GO/IBSS has changed and needs update */ 1147 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, 1148 struct ieee80211_vif *vif) 1149 { 1150 struct sk_buff *beacon; 1151 int ret; 1152 1153 WARN_ON(vif->type != NL80211_IFTYPE_AP && 1154 vif->type != NL80211_IFTYPE_ADHOC); 1155 1156 beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); 1157 if (!beacon) 1158 return -ENOMEM; 1159 1160 ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); 1161 dev_kfree_skb(beacon); 1162 return ret; 1163 } 1164 1165 struct iwl_mvm_mac_ap_iterator_data { 1166 struct iwl_mvm *mvm; 1167 struct ieee80211_vif *vif; 1168 u32 beacon_device_ts; 1169 u16 beacon_int; 1170 }; 1171 1172 /* Find the beacon_device_ts and beacon_int for a managed interface */ 1173 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, 1174 struct ieee80211_vif *vif) 1175 { 1176 struct iwl_mvm_mac_ap_iterator_data *data = _data; 1177 1178 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) 1179 return; 1180 1181 /* Station client has higher priority over P2P client*/ 1182 if (vif->p2p && data->beacon_device_ts) 1183 return; 1184 1185 data->beacon_device_ts = vif->bss_conf.sync_device_ts; 1186 data->beacon_int = vif->bss_conf.beacon_int; 1187 } 1188 1189 /* 1190 * Fill the specific data for mac context of type AP of P2P GO 1191 */ 1192 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, 1193 struct ieee80211_vif *vif, 1194 struct iwl_mac_ctx_cmd *cmd, 1195 struct iwl_mac_data_ap *ctxt_ap, 1196 bool add) 1197 { 1198 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1199 struct iwl_mvm_mac_ap_iterator_data data = { 1200 .mvm = mvm, 1201 .vif = vif, 1202 .beacon_device_ts = 0 1203 }; 1204 1205 /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ 1206 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST); 1207 1208 /* 1209 * in AP mode, pass probe requests and beacons from other APs 1210 * (needed for ht protection); when there're no any associated 1211 * station don't ask FW to pass beacons to prevent unnecessary 1212 * wake-ups. 1213 */ 1214 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); 1215 if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) { 1216 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); 1217 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n"); 1218 } else { 1219 IWL_DEBUG_HC(mvm, "No need to receive beacons\n"); 1220 } 1221 1222 ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); 1223 ctxt_ap->bi_reciprocal = 1224 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); 1225 ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * 1226 vif->bss_conf.dtim_period); 1227 ctxt_ap->dtim_reciprocal = 1228 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * 1229 vif->bss_conf.dtim_period)); 1230 1231 if (!fw_has_api(&mvm->fw->ucode_capa, 1232 IWL_UCODE_TLV_API_STA_TYPE)) 1233 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); 1234 1235 /* 1236 * Only set the beacon time when the MAC is being added, when we 1237 * just modify the MAC then we should keep the time -- the firmware 1238 * can otherwise have a "jumping" TBTT. 1239 */ 1240 if (add) { 1241 /* 1242 * If there is a station/P2P client interface which is 1243 * associated, set the AP's TBTT far enough from the station's 1244 * TBTT. Otherwise, set it to the current system time 1245 */ 1246 ieee80211_iterate_active_interfaces_atomic( 1247 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, 1248 iwl_mvm_mac_ap_iterator, &data); 1249 1250 if (data.beacon_device_ts) { 1251 u32 rand = (prandom_u32() % (64 - 36)) + 36; 1252 mvmvif->ap_beacon_time = data.beacon_device_ts + 1253 ieee80211_tu_to_usec(data.beacon_int * rand / 1254 100); 1255 } else { 1256 mvmvif->ap_beacon_time = 1257 iwl_read_prph(mvm->trans, 1258 DEVICE_SYSTEM_TIME_REG); 1259 } 1260 } 1261 1262 ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); 1263 ctxt_ap->beacon_tsf = 0; /* unused */ 1264 1265 /* TODO: Assume that the beacon id == mac context id */ 1266 ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); 1267 } 1268 1269 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, 1270 struct ieee80211_vif *vif, 1271 u32 action) 1272 { 1273 struct iwl_mac_ctx_cmd cmd = {}; 1274 1275 WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); 1276 1277 /* Fill the common data for all mac context types */ 1278 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1279 1280 /* Fill the data specific for ap mode */ 1281 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap, 1282 action == FW_CTXT_ACTION_ADD); 1283 1284 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1285 } 1286 1287 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, 1288 struct ieee80211_vif *vif, 1289 u32 action) 1290 { 1291 struct iwl_mac_ctx_cmd cmd = {}; 1292 struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; 1293 1294 WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); 1295 1296 /* Fill the common data for all mac context types */ 1297 iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); 1298 1299 /* Fill the data specific for GO mode */ 1300 iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap, 1301 action == FW_CTXT_ACTION_ADD); 1302 1303 cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & 1304 IEEE80211_P2P_OPPPS_CTWINDOW_MASK); 1305 cmd.go.opp_ps_enabled = 1306 cpu_to_le32(!!(noa->oppps_ctwindow & 1307 IEEE80211_P2P_OPPPS_ENABLE_BIT)); 1308 1309 return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); 1310 } 1311 1312 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1313 u32 action, bool force_assoc_off, 1314 const u8 *bssid_override) 1315 { 1316 switch (vif->type) { 1317 case NL80211_IFTYPE_STATION: 1318 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action, 1319 force_assoc_off, 1320 bssid_override); 1321 break; 1322 case NL80211_IFTYPE_AP: 1323 if (!vif->p2p) 1324 return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); 1325 else 1326 return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); 1327 break; 1328 case NL80211_IFTYPE_MONITOR: 1329 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); 1330 case NL80211_IFTYPE_P2P_DEVICE: 1331 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); 1332 case NL80211_IFTYPE_ADHOC: 1333 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); 1334 default: 1335 break; 1336 } 1337 1338 return -EOPNOTSUPP; 1339 } 1340 1341 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1342 { 1343 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1344 int ret; 1345 1346 if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", 1347 vif->addr, ieee80211_vif_type_p2p(vif))) 1348 return -EIO; 1349 1350 ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD, 1351 true, NULL); 1352 if (ret) 1353 return ret; 1354 1355 /* will only do anything at resume from D3 time */ 1356 iwl_mvm_set_last_nonqos_seq(mvm, vif); 1357 1358 mvmvif->uploaded = true; 1359 return 0; 1360 } 1361 1362 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1363 bool force_assoc_off, const u8 *bssid_override) 1364 { 1365 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1366 1367 if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", 1368 vif->addr, ieee80211_vif_type_p2p(vif))) 1369 return -EIO; 1370 1371 return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY, 1372 force_assoc_off, bssid_override); 1373 } 1374 1375 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1376 { 1377 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1378 struct iwl_mac_ctx_cmd cmd; 1379 int ret; 1380 1381 if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", 1382 vif->addr, ieee80211_vif_type_p2p(vif))) 1383 return -EIO; 1384 1385 memset(&cmd, 0, sizeof(cmd)); 1386 1387 cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 1388 mvmvif->color)); 1389 cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 1390 1391 ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0, 1392 sizeof(cmd), &cmd); 1393 if (ret) { 1394 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); 1395 return ret; 1396 } 1397 1398 mvmvif->uploaded = false; 1399 1400 if (vif->type == NL80211_IFTYPE_MONITOR) { 1401 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags); 1402 iwl_mvm_dealloc_snif_sta(mvm); 1403 } 1404 1405 return 0; 1406 } 1407 1408 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm, 1409 struct ieee80211_vif *csa_vif, u32 gp2, 1410 bool tx_success) 1411 { 1412 struct iwl_mvm_vif *mvmvif = 1413 iwl_mvm_vif_from_mac80211(csa_vif); 1414 1415 /* Don't start to countdown from a failed beacon */ 1416 if (!tx_success && !mvmvif->csa_countdown) 1417 return; 1418 1419 mvmvif->csa_countdown = true; 1420 1421 if (!ieee80211_csa_is_complete(csa_vif)) { 1422 int c = ieee80211_csa_update_counter(csa_vif); 1423 1424 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif); 1425 if (csa_vif->p2p && 1426 !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 && 1427 tx_success) { 1428 u32 rel_time = (c + 1) * 1429 csa_vif->bss_conf.beacon_int - 1430 IWL_MVM_CHANNEL_SWITCH_TIME_GO; 1431 u32 apply_time = gp2 + rel_time * 1024; 1432 1433 iwl_mvm_schedule_csa_period(mvm, csa_vif, 1434 IWL_MVM_CHANNEL_SWITCH_TIME_GO - 1435 IWL_MVM_CHANNEL_SWITCH_MARGIN, 1436 apply_time); 1437 } 1438 } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) { 1439 /* we don't have CSA NoA scheduled yet, switch now */ 1440 ieee80211_csa_finish(csa_vif); 1441 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1442 } 1443 } 1444 1445 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm, 1446 struct iwl_rx_cmd_buffer *rxb) 1447 { 1448 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1449 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; 1450 struct iwl_mvm_tx_resp *beacon_notify_hdr; 1451 struct ieee80211_vif *csa_vif; 1452 struct ieee80211_vif *tx_blocked_vif; 1453 struct agg_tx_status *agg_status; 1454 u16 status; 1455 1456 lockdep_assert_held(&mvm->mutex); 1457 1458 beacon_notify_hdr = &beacon->beacon_notify_hdr; 1459 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); 1460 1461 agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr); 1462 status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK; 1463 IWL_DEBUG_RX(mvm, 1464 "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n", 1465 status, beacon_notify_hdr->failure_frame, 1466 le64_to_cpu(beacon->tsf), 1467 mvm->ap_last_beacon_gp2, 1468 le32_to_cpu(beacon_notify_hdr->initial_rate)); 1469 1470 csa_vif = rcu_dereference_protected(mvm->csa_vif, 1471 lockdep_is_held(&mvm->mutex)); 1472 if (unlikely(csa_vif && csa_vif->csa_active)) 1473 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2, 1474 (status == TX_STATUS_SUCCESS)); 1475 1476 tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif, 1477 lockdep_is_held(&mvm->mutex)); 1478 if (unlikely(tx_blocked_vif)) { 1479 struct iwl_mvm_vif *mvmvif = 1480 iwl_mvm_vif_from_mac80211(tx_blocked_vif); 1481 1482 /* 1483 * The channel switch is started and we have blocked the 1484 * stations. If this is the first beacon (the timeout wasn't 1485 * set), set the unblock timeout, otherwise countdown 1486 */ 1487 if (!mvm->csa_tx_block_bcn_timeout) 1488 mvm->csa_tx_block_bcn_timeout = 1489 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT; 1490 else 1491 mvm->csa_tx_block_bcn_timeout--; 1492 1493 /* Check if the timeout is expired, and unblock tx */ 1494 if (mvm->csa_tx_block_bcn_timeout == 0) { 1495 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false); 1496 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 1497 } 1498 } 1499 } 1500 1501 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, 1502 struct ieee80211_vif *vif) 1503 { 1504 struct iwl_missed_beacons_notif *missed_beacons = _data; 1505 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1506 struct iwl_mvm *mvm = mvmvif->mvm; 1507 struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig; 1508 struct iwl_fw_dbg_trigger_tlv *trigger; 1509 u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx; 1510 u32 rx_missed_bcon, rx_missed_bcon_since_rx; 1511 1512 if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) 1513 return; 1514 1515 rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); 1516 rx_missed_bcon_since_rx = 1517 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx); 1518 /* 1519 * TODO: the threshold should be adjusted based on latency conditions, 1520 * and/or in case of a CS flow on one of the other AP vifs. 1521 */ 1522 if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > 1523 IWL_MVM_MISSED_BEACONS_THRESHOLD) 1524 ieee80211_beacon_loss(vif); 1525 1526 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, 1527 FW_DBG_TRIGGER_MISSED_BEACONS)) 1528 return; 1529 1530 trigger = iwl_fw_dbg_get_trigger(mvm->fw, 1531 FW_DBG_TRIGGER_MISSED_BEACONS); 1532 bcon_trig = (void *)trigger->data; 1533 stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon); 1534 stop_trig_missed_bcon_since_rx = 1535 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx); 1536 1537 /* TODO: implement start trigger */ 1538 1539 if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger)) 1540 return; 1541 1542 if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || 1543 rx_missed_bcon >= stop_trig_missed_bcon) 1544 iwl_mvm_fw_dbg_collect_trig(mvm, trigger, NULL); 1545 } 1546 1547 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm, 1548 struct iwl_rx_cmd_buffer *rxb) 1549 { 1550 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1551 struct iwl_missed_beacons_notif *mb = (void *)pkt->data; 1552 1553 IWL_DEBUG_INFO(mvm, 1554 "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", 1555 le32_to_cpu(mb->mac_id), 1556 le32_to_cpu(mb->consec_missed_beacons), 1557 le32_to_cpu(mb->consec_missed_beacons_since_last_rx), 1558 le32_to_cpu(mb->num_recvd_beacons), 1559 le32_to_cpu(mb->num_expected_beacons)); 1560 1561 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 1562 IEEE80211_IFACE_ITER_NORMAL, 1563 iwl_mvm_beacon_loss_iterator, 1564 mb); 1565 } 1566 1567 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm, 1568 struct iwl_rx_cmd_buffer *rxb) 1569 { 1570 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1571 struct iwl_stored_beacon_notif *sb = (void *)pkt->data; 1572 struct ieee80211_rx_status rx_status; 1573 struct sk_buff *skb; 1574 u32 size = le32_to_cpu(sb->byte_count); 1575 1576 if (size == 0) 1577 return; 1578 1579 skb = alloc_skb(size, GFP_ATOMIC); 1580 if (!skb) { 1581 IWL_ERR(mvm, "alloc_skb failed\n"); 1582 return; 1583 } 1584 1585 /* update rx_status according to the notification's metadata */ 1586 memset(&rx_status, 0, sizeof(rx_status)); 1587 rx_status.mactime = le64_to_cpu(sb->tsf); 1588 /* TSF as indicated by the firmware is at INA time */ 1589 rx_status.flag |= RX_FLAG_MACTIME_PLCP_START; 1590 rx_status.device_timestamp = le32_to_cpu(sb->system_time); 1591 rx_status.band = 1592 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 1593 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; 1594 rx_status.freq = 1595 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel), 1596 rx_status.band); 1597 1598 /* copy the data */ 1599 memcpy(skb_put(skb, size), sb->data, size); 1600 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 1601 1602 /* pass it as regular rx to mac80211 */ 1603 ieee80211_rx_napi(mvm->hw, NULL, skb, NULL); 1604 } 1605 1606 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm, 1607 struct iwl_rx_cmd_buffer *rxb) 1608 { 1609 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1610 struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data; 1611 struct ieee80211_vif *csa_vif; 1612 struct iwl_mvm_vif *mvmvif; 1613 int len = iwl_rx_packet_payload_len(pkt); 1614 u32 id_n_color; 1615 1616 if (WARN_ON_ONCE(len < sizeof(*notif))) 1617 return; 1618 1619 rcu_read_lock(); 1620 1621 csa_vif = rcu_dereference(mvm->csa_vif); 1622 if (WARN_ON(!csa_vif || !csa_vif->csa_active)) 1623 goto out_unlock; 1624 1625 id_n_color = le32_to_cpu(notif->id_and_color); 1626 1627 mvmvif = iwl_mvm_vif_from_mac80211(csa_vif); 1628 if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color, 1629 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)", 1630 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color)) 1631 goto out_unlock; 1632 1633 IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n"); 1634 1635 queue_delayed_work(system_wq, &mvm->cs_tx_unblock_dwork, 1636 msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT * 1637 csa_vif->bss_conf.beacon_int)); 1638 1639 ieee80211_csa_finish(csa_vif); 1640 1641 rcu_read_unlock(); 1642 1643 RCU_INIT_POINTER(mvm->csa_vif, NULL); 1644 1645 return; 1646 1647 out_unlock: 1648 rcu_read_unlock(); 1649 } 1650