drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c

   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.
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  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
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  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.
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  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 }