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 - 2017 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
  25  *
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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 - 2017 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.
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  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
  76 const u8 iwl_mvm_ac_to_tx_fifo[] = {
  77         IWL_MVM_TX_FIFO_VO,
  78         IWL_MVM_TX_FIFO_VI,
  79         IWL_MVM_TX_FIFO_BE,
  80         IWL_MVM_TX_FIFO_BK,
  81 };
  82
  83 const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = {
  84         IWL_GEN2_EDCA_TX_FIFO_VO,
  85         IWL_GEN2_EDCA_TX_FIFO_VI,
  86         IWL_GEN2_EDCA_TX_FIFO_BE,
  87         IWL_GEN2_EDCA_TX_FIFO_BK,
  88 };
  89
  90 struct iwl_mvm_mac_iface_iterator_data {
  91         struct iwl_mvm *mvm;
  92         struct ieee80211_vif *vif;
  93         unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  94         unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  95         enum iwl_tsf_id preferred_tsf;
  96         bool found_vif;
  97 };
  98
  99 struct iwl_mvm_hw_queues_iface_iterator_data {
 100         struct ieee80211_vif *exclude_vif;
 101         unsigned long used_hw_queues;
 102 };
 103
 104 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
 105                                     struct ieee80211_vif *vif)
 106 {
 107         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 108         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 109         u16 min_bi;
 110
 111         /* Skip the interface for which we are trying to assign a tsf_id  */
 112         if (vif == data->vif)
 113                 return;
 114
 115         /*
 116          * The TSF is a hardware/firmware resource, there are 4 and
 117          * the driver should assign and free them as needed. However,
 118          * there are cases where 2 MACs should share the same TSF ID
 119          * for the purpose of clock sync, an optimization to avoid
 120          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 121          * client in the system.
 122          *
 123          * The firmware will decide according to the MAC type which
 124          * will be the master and slave. Clients that need to sync
 125          * with a remote station will be the master, and an AP or GO
 126          * will be the slave.
 127          *
 128          * Depending on the new interface type it can be slaved to
 129          * or become the master of an existing interface.
 130          */
 131         switch (data->vif->type) {
 132         case NL80211_IFTYPE_STATION:
 133                 /*
 134                  * The new interface is a client, so if the one we're iterating
 135                  * is an AP, and the beacon interval of the AP is a multiple or
 136                  * divisor of the beacon interval of the client, the same TSF
 137                  * should be used to avoid drift between the new client and
 138                  * existing AP. The existing AP will get drift updates from the
 139                  * new client context in this case.
 140                  */
 141                 if (vif->type != NL80211_IFTYPE_AP ||
 142                     data->preferred_tsf != NUM_TSF_IDS ||
 143                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 144                         break;
 145
 146                 min_bi = min(data->vif->bss_conf.beacon_int,
 147                              vif->bss_conf.beacon_int);
 148
 149                 if (!min_bi)
 150                         break;
 151
 152                 if ((data->vif->bss_conf.beacon_int -
 153                      vif->bss_conf.beacon_int) % min_bi == 0) {
 154                         data->preferred_tsf = mvmvif->tsf_id;
 155                         return;
 156                 }
 157                 break;
 158
 159         case NL80211_IFTYPE_AP:
 160                 /*
 161                  * The new interface is AP/GO, so if its beacon interval is a
 162                  * multiple or a divisor of the beacon interval of an existing
 163                  * interface, it should get drift updates from an existing
 164                  * client or use the same TSF as an existing GO. There's no
 165                  * drift between TSFs internally but if they used different
 166                  * TSFs then a new client MAC could update one of them and
 167                  * cause drift that way.
 168                  */
 169                 if ((vif->type != NL80211_IFTYPE_AP &&
 170                      vif->type != NL80211_IFTYPE_STATION) ||
 171                     data->preferred_tsf != NUM_TSF_IDS ||
 172                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 173                         break;
 174
 175                 min_bi = min(data->vif->bss_conf.beacon_int,
 176                              vif->bss_conf.beacon_int);
 177
 178                 if (!min_bi)
 179                         break;
 180
 181                 if ((data->vif->bss_conf.beacon_int -
 182                      vif->bss_conf.beacon_int) % min_bi == 0) {
 183                         data->preferred_tsf = mvmvif->tsf_id;
 184                         return;
 185                 }
 186                 break;
 187         default:
 188                 /*
 189                  * For all other interface types there's no need to
 190                  * take drift into account. Either they're exclusive
 191                  * like IBSS and monitor, or we don't care much about
 192                  * their TSF (like P2P Device), but we won't be able
 193                  * to share the TSF resource.
 194                  */
 195                 break;
 196         }
 197
 198         /*
 199          * Unless we exited above, we can't share the TSF resource
 200          * that the virtual interface we're iterating over is using
 201          * with the new one, so clear the available bit and if this
 202          * was the preferred one, reset that as well.
 203          */
 204         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 205
 206         if (data->preferred_tsf == mvmvif->tsf_id)
 207                 data->preferred_tsf = NUM_TSF_IDS;
 208 }
 209
 210 /*
 211  * Get the mask of the queues used by the vif
 212  */
 213 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif)
 214 {
 215         u32 qmask = 0, ac;
 216
 217         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 218                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 219
 220         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 221                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 222                         qmask |= BIT(vif->hw_queue[ac]);
 223         }
 224
 225         if (vif->type == NL80211_IFTYPE_AP ||
 226             vif->type == NL80211_IFTYPE_ADHOC)
 227                 qmask |= BIT(vif->cab_queue);
 228
 229         return qmask;
 230 }
 231
 232 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac,
 233                                          struct ieee80211_vif *vif)
 234 {
 235         struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
 236
 237         /* exclude the given vif */
 238         if (vif == data->exclude_vif)
 239                 return;
 240
 241         data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif);
 242 }
 243
 244 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,
 245                                          struct ieee80211_vif *exclude_vif)
 246 {
 247         struct iwl_mvm_hw_queues_iface_iterator_data data = {
 248                 .exclude_vif = exclude_vif,
 249                 .used_hw_queues =
 250                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 251                         BIT(mvm->aux_queue) |
 252                         BIT(IWL_MVM_DQA_GCAST_QUEUE),
 253         };
 254
 255         lockdep_assert_held(&mvm->mutex);
 256
 257         /* mark all VIF used hw queues */
 258         ieee80211_iterate_active_interfaces_atomic(
 259                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 260                 iwl_mvm_iface_hw_queues_iter, &data);
 261
 262         return data.used_hw_queues;
 263 }
 264
 265 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 266                                        struct ieee80211_vif *vif)
 267 {
 268         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 269         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 270
 271         /* Iterator may already find the interface being added -- skip it */
 272         if (vif == data->vif) {
 273                 data->found_vif = true;
 274                 return;
 275         }
 276
 277         /* Mark MAC IDs as used by clearing the available bit, and
 278          * (below) mark TSFs as used if their existing use is not
 279          * compatible with the new interface type.
 280          * No locking or atomic bit operations are needed since the
 281          * data is on the stack of the caller function.
 282          */
 283         __clear_bit(mvmvif->id, data->available_mac_ids);
 284
 285         /* find a suitable tsf_id */
 286         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 287 }
 288
 289 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 290                                     struct ieee80211_vif *vif)
 291 {
 292         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 293         struct iwl_mvm_mac_iface_iterator_data data = {
 294                 .mvm = mvm,
 295                 .vif = vif,
 296                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 297                 /* no preference yet */
 298                 .preferred_tsf = NUM_TSF_IDS,
 299         };
 300
 301         ieee80211_iterate_active_interfaces_atomic(
 302                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 303                 iwl_mvm_mac_tsf_id_iter, &data);
 304
 305         if (data.preferred_tsf != NUM_TSF_IDS)
 306                 mvmvif->tsf_id = data.preferred_tsf;
 307         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 308                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 309                                                 NUM_TSF_IDS);
 310 }
 311
 312 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 313 {
 314         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 315         struct iwl_mvm_mac_iface_iterator_data data = {
 316                 .mvm = mvm,
 317                 .vif = vif,
 318                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 319                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 320                 /* no preference yet */
 321                 .preferred_tsf = NUM_TSF_IDS,
 322                 .found_vif = false,
 323         };
 324         u32 ac;
 325         int ret, i, queue_limit;
 326         unsigned long used_hw_queues;
 327
 328         lockdep_assert_held(&mvm->mutex);
 329
 330         /*
 331          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 332          * and other resources.
 333          */
 334
 335         /*
 336          * Before the iterator, we start with all MAC IDs and TSFs available.
 337          *
 338          * During iteration, all MAC IDs are cleared that are in use by other
 339          * virtual interfaces, and all TSF IDs are cleared that can't be used
 340          * by this new virtual interface because they're used by an interface
 341          * that can't share it with the new one.
 342          * At the same time, we check if there's a preferred TSF in the case
 343          * that we should share it with another interface.
 344          */
 345
 346         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 347         switch (vif->type) {
 348         case NL80211_IFTYPE_ADHOC:
 349                 break;
 350         case NL80211_IFTYPE_STATION:
 351                 if (!vif->p2p)
 352                         break;
 353                 /* fall through */
 354         default:
 355                 __clear_bit(0, data.available_mac_ids);
 356         }
 357
 358         ieee80211_iterate_active_interfaces_atomic(
 359                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 360                 iwl_mvm_mac_iface_iterator, &data);
 361
 362         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif);
 363
 364         /*
 365          * In the case we're getting here during resume, it's similar to
 366          * firmware restart, and with RESUME_ALL the iterator will find
 367          * the vif being added already.
 368          * We don't want to reassign any IDs in either case since doing
 369          * so would probably assign different IDs (as interfaces aren't
 370          * necessarily added in the same order), but the old IDs were
 371          * preserved anyway, so skip ID assignment for both resume and
 372          * recovery.
 373          */
 374         if (data.found_vif)
 375                 return 0;
 376
 377         /* Therefore, in recovery, we can't get here */
 378         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 379                 return -EBUSY;
 380
 381         mvmvif->id = find_first_bit(data.available_mac_ids,
 382                                     NUM_MAC_INDEX_DRIVER);
 383         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 384                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 385                 ret = -EIO;
 386                 goto exit_fail;
 387         }
 388
 389         if (data.preferred_tsf != NUM_TSF_IDS)
 390                 mvmvif->tsf_id = data.preferred_tsf;
 391         else
 392                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 393                                                 NUM_TSF_IDS);
 394         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 395                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 396                 ret = -EIO;
 397                 goto exit_fail;
 398         }
 399
 400         mvmvif->color = 0;
 401
 402         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 403         mvmvif->time_event_data.id = TE_MAX;
 404
 405         /* No need to allocate data queues to P2P Device MAC.*/
 406         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 407                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 408                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 409
 410                 return 0;
 411         }
 412
 413         /*
 414          * queues in mac80211 almost entirely independent of
 415          * the ones here - no real limit
 416          */
 417         queue_limit = IEEE80211_MAX_QUEUES;
 418         BUILD_BUG_ON(IEEE80211_MAX_QUEUES >
 419                      BITS_PER_BYTE *
 420                      sizeof(mvm->hw_queue_to_mac80211[0]));
 421
 422         /*
 423          * Find available queues, and allocate them to the ACs. When in
 424          * DQA-mode they aren't really used, and this is done only so the
 425          * mac80211 ieee80211_check_queues() function won't fail
 426          */
 427         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 428                 u8 queue = find_first_zero_bit(&used_hw_queues, queue_limit);
 429
 430                 if (queue >= queue_limit) {
 431                         IWL_ERR(mvm, "Failed to allocate queue\n");
 432                         ret = -EIO;
 433                         goto exit_fail;
 434                 }
 435
 436                 __set_bit(queue, &used_hw_queues);
 437                 vif->hw_queue[ac] = queue;
 438         }
 439
 440         /* Allocate the CAB queue for softAP and GO interfaces */
 441         if (vif->type == NL80211_IFTYPE_AP) {
 442                 /*
 443                  * For TVQM this will be overwritten later with the FW assigned
 444                  * queue value (when queue is enabled).
 445                  */
 446                 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
 447                 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
 448         } else {
 449                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 450         }
 451
 452         mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA;
 453         mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA;
 454         mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
 455
 456         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 457                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 458
 459         return 0;
 460
 461 exit_fail:
 462         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 463         memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 464         vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 465         return ret;
 466 }
 467
 468 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 469                               struct ieee80211_vif *vif,
 470                               enum nl80211_band band,
 471                               u8 *cck_rates, u8 *ofdm_rates)
 472 {
 473         struct ieee80211_supported_band *sband;
 474         unsigned long basic = vif->bss_conf.basic_rates;
 475         int lowest_present_ofdm = 100;
 476         int lowest_present_cck = 100;
 477         u8 cck = 0;
 478         u8 ofdm = 0;
 479         int i;
 480
 481         sband = mvm->hw->wiphy->bands[band];
 482
 483         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 484                 int hw = sband->bitrates[i].hw_value;
 485                 if (hw >= IWL_FIRST_OFDM_RATE) {
 486                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 487                         if (lowest_present_ofdm > hw)
 488                                 lowest_present_ofdm = hw;
 489                 } else {
 490                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 491
 492                         cck |= BIT(hw);
 493                         if (lowest_present_cck > hw)
 494                                 lowest_present_cck = hw;
 495                 }
 496         }
 497
 498         /*
 499          * Now we've got the basic rates as bitmaps in the ofdm and cck
 500          * variables. This isn't sufficient though, as there might not
 501          * be all the right rates in the bitmap. E.g. if the only basic
 502          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 503          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 504          *
 505          *    [...] a STA responding to a received frame shall transmit
 506          *    its Control Response frame [...] at the highest rate in the
 507          *    BSSBasicRateSet parameter that is less than or equal to the
 508          *    rate of the immediately previous frame in the frame exchange
 509          *    sequence ([...]) and that is of the same modulation class
 510          *    ([...]) as the received frame. If no rate contained in the
 511          *    BSSBasicRateSet parameter meets these conditions, then the
 512          *    control frame sent in response to a received frame shall be
 513          *    transmitted at the highest mandatory rate of the PHY that is
 514          *    less than or equal to the rate of the received frame, and
 515          *    that is of the same modulation class as the received frame.
 516          *
 517          * As a consequence, we need to add all mandatory rates that are
 518          * lower than all of the basic rates to these bitmaps.
 519          */
 520
 521         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 522                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 523         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 524                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 525         /* 6M already there or needed so always add */
 526         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 527
 528         /*
 529          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 530          * Note, however:
 531          *  - if no CCK rates are basic, it must be ERP since there must
 532          *    be some basic rates at all, so they're OFDM => ERP PHY
 533          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 534          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 535          *  - if 5.5M is basic, 1M and 2M are mandatory
 536          *  - if 2M is basic, 1M is mandatory
 537          *  - if 1M is basic, that's the only valid ACK rate.
 538          * As a consequence, it's not as complicated as it sounds, just add
 539          * any lower rates to the ACK rate bitmap.
 540          */
 541         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 542                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 543         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 544                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 545         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 546                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 547         /* 1M already there or needed so always add */
 548         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 549
 550         *cck_rates = cck;
 551         *ofdm_rates = ofdm;
 552 }
 553
 554 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 555                                          struct ieee80211_vif *vif,
 556                                          struct iwl_mac_ctx_cmd *cmd)
 557 {
 558         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 559         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 560                                  IEEE80211_HT_OP_MODE_PROTECTION;
 561         /* The fw does not distinguish between ht and fat */
 562         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 563
 564         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 565         /*
 566          * See section 9.23.3.1 of IEEE 80211-2012.
 567          * Nongreenfield HT STAs Present is not supported.
 568          */
 569         switch (protection_mode) {
 570         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 571                 break;
 572         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 573         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 574                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 575                 break;
 576         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 577                 /* Protect when channel wider than 20MHz */
 578                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 579                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 580                 break;
 581         default:
 582                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 583                         protection_mode);
 584                 break;
 585         }
 586 }
 587
 588 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 589                                         struct ieee80211_vif *vif,
 590                                         struct iwl_mac_ctx_cmd *cmd,
 591                                         const u8 *bssid_override,
 592                                         u32 action)
 593 {
 594         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 595         struct ieee80211_chanctx_conf *chanctx;
 596         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 597                              IEEE80211_HT_OP_MODE_PROTECTION);
 598         u8 cck_ack_rates, ofdm_ack_rates;
 599         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 600         int i;
 601
 602         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 603                                                             mvmvif->color));
 604         cmd->action = cpu_to_le32(action);
 605
 606         switch (vif->type) {
 607         case NL80211_IFTYPE_STATION:
 608                 if (vif->p2p)
 609                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 610                 else
 611                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 612                 break;
 613         case NL80211_IFTYPE_AP:
 614                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 615                 break;
 616         case NL80211_IFTYPE_MONITOR:
 617                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 618                 break;
 619         case NL80211_IFTYPE_P2P_DEVICE:
 620                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 621                 break;
 622         case NL80211_IFTYPE_ADHOC:
 623                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 624                 break;
 625         default:
 626                 WARN_ON_ONCE(1);
 627         }
 628
 629         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 630
 631         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 632
 633         if (bssid)
 634                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 635         else
 636                 eth_broadcast_addr(cmd->bssid_addr);
 637
 638         rcu_read_lock();
 639         chanctx = rcu_dereference(vif->chanctx_conf);
 640         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 641                                             : NL80211_BAND_2GHZ,
 642                           &cck_ack_rates, &ofdm_ack_rates);
 643         rcu_read_unlock();
 644
 645         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 646         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 647
 648         cmd->cck_short_preamble =
 649                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 650                             MAC_FLG_SHORT_PREAMBLE : 0);
 651         cmd->short_slot =
 652                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 653                             MAC_FLG_SHORT_SLOT : 0);
 654
 655         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 656
 657         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 658                 u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i);
 659
 660                 cmd->ac[txf].cw_min =
 661                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 662                 cmd->ac[txf].cw_max =
 663                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 664                 cmd->ac[txf].edca_txop =
 665                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 666                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 667                 cmd->ac[txf].fifos_mask = BIT(txf);
 668         }
 669
 670         if (vif->bss_conf.qos)
 671                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 672
 673         if (vif->bss_conf.use_cts_prot)
 674                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 675
 676         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 677                        vif->bss_conf.use_cts_prot,
 678                        vif->bss_conf.ht_operation_mode);
 679         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 680                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 681         if (ht_enabled)
 682                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 683 }
 684
 685 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 686                                      struct iwl_mac_ctx_cmd *cmd)
 687 {
 688         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 689                                        sizeof(*cmd), cmd);
 690         if (ret)
 691                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 692                         le32_to_cpu(cmd->action), ret);
 693         return ret;
 694 }
 695
 696 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 697                                     struct ieee80211_vif *vif,
 698                                     u32 action, bool force_assoc_off,
 699                                     const u8 *bssid_override)
 700 {
 701         struct iwl_mac_ctx_cmd cmd = {};
 702         struct iwl_mac_data_sta *ctxt_sta;
 703
 704         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 705
 706         /* Fill the common data for all mac context types */
 707         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 708
 709         if (vif->p2p) {
 710                 struct ieee80211_p2p_noa_attr *noa =
 711                         &vif->bss_conf.p2p_noa_attr;
 712
 713                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 714                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 715                 ctxt_sta = &cmd.p2p_sta.sta;
 716         } else {
 717                 ctxt_sta = &cmd.sta;
 718         }
 719
 720         /* We need the dtim_period to set the MAC as associated */
 721         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 722             !force_assoc_off) {
 723                 u32 dtim_offs;
 724
 725                 /*
 726                  * The DTIM count counts down, so when it is N that means N
 727                  * more beacon intervals happen until the DTIM TBTT. Therefore
 728                  * add this to the current time. If that ends up being in the
 729                  * future, the firmware will handle it.
 730                  *
 731                  * Also note that the system_timestamp (which we get here as
 732                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 733                  * same offset in the frame -- the TSF is at the first symbol
 734                  * of the TSF, the system timestamp is at signal acquisition
 735                  * time. This means there's an offset between them of at most
 736                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 737                  * 384us in the longest case), this is currently not relevant
 738                  * as the firmware wakes up around 2ms before the TBTT.
 739                  */
 740                 dtim_offs = vif->bss_conf.sync_dtim_count *
 741                                 vif->bss_conf.beacon_int;
 742                 /* convert TU to usecs */
 743                 dtim_offs *= 1024;
 744
 745                 ctxt_sta->dtim_tsf =
 746                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 747                 ctxt_sta->dtim_time =
 748                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 749                 ctxt_sta->assoc_beacon_arrive_time =
 750                         cpu_to_le32(vif->bss_conf.sync_device_ts);
 751
 752                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 753                                le64_to_cpu(ctxt_sta->dtim_tsf),
 754                                le32_to_cpu(ctxt_sta->dtim_time),
 755                                dtim_offs);
 756
 757                 ctxt_sta->is_assoc = cpu_to_le32(1);
 758         } else {
 759                 ctxt_sta->is_assoc = cpu_to_le32(0);
 760
 761                 /* Allow beacons to pass through as long as we are not
 762                  * associated, or we do not have dtim period information.
 763                  */
 764                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 765         }
 766
 767         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 768         ctxt_sta->bi_reciprocal =
 769                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 770         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 771                                               vif->bss_conf.dtim_period);
 772         ctxt_sta->dtim_reciprocal =
 773                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 774                                                vif->bss_conf.dtim_period));
 775
 776         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 777         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 778
 779         if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
 780                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 781
 782         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 783 }
 784
 785 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 786                                          struct ieee80211_vif *vif,
 787                                          u32 action)
 788 {
 789         struct iwl_mac_ctx_cmd cmd = {};
 790         u32 tfd_queue_msk = BIT(mvm->snif_queue);
 791         int ret;
 792
 793         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 794
 795         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 796
 797         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 798                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 799                                        MAC_FILTER_IN_BEACON |
 800                                        MAC_FILTER_IN_PROBE_REQUEST |
 801                                        MAC_FILTER_IN_CRC32);
 802         ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
 803
 804         /* Allocate sniffer station */
 805         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk,
 806                                        vif->type, IWL_STA_GENERAL_PURPOSE);
 807         if (ret)
 808                 return ret;
 809
 810         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 811 }
 812
 813 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 814                                      struct ieee80211_vif *vif,
 815                                      u32 action)
 816 {
 817         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 818         struct iwl_mac_ctx_cmd cmd = {};
 819
 820         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 821
 822         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 823
 824         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 825                                        MAC_FILTER_IN_PROBE_REQUEST);
 826
 827         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 828         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 829         cmd.ibss.bi_reciprocal =
 830                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 831
 832         /* TODO: Assumes that the beacon id == mac context id */
 833         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 834
 835         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 836 }
 837
 838 struct iwl_mvm_go_iterator_data {
 839         bool go_active;
 840 };
 841
 842 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 843 {
 844         struct iwl_mvm_go_iterator_data *data = _data;
 845         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 846
 847         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 848             mvmvif->ap_ibss_active)
 849                 data->go_active = true;
 850 }
 851
 852 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 853                                            struct ieee80211_vif *vif,
 854                                            u32 action)
 855 {
 856         struct iwl_mac_ctx_cmd cmd = {};
 857         struct iwl_mvm_go_iterator_data data = {};
 858
 859         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 860
 861         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 862
 863         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 864
 865         /* Override the filter flags to accept only probe requests */
 866         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 867
 868         /*
 869          * This flag should be set to true when the P2P Device is
 870          * discoverable and there is at least another active P2P GO. Settings
 871          * this flag will allow the P2P Device to be discoverable on other
 872          * channels in addition to its listen channel.
 873          * Note that this flag should not be set in other cases as it opens the
 874          * Rx filters on all MAC and increases the number of interrupts.
 875          */
 876         ieee80211_iterate_active_interfaces_atomic(
 877                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 878                 iwl_mvm_go_iterator, &data);
 879
 880         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 881         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 882 }
 883
 884 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 885                                      __le32 *tim_index, __le32 *tim_size,
 886                                      u8 *beacon, u32 frame_size)
 887 {
 888         u32 tim_idx;
 889         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 890
 891         /* The index is relative to frame start but we start looking at the
 892          * variable-length part of the beacon. */
 893         tim_idx = mgmt->u.beacon.variable - beacon;
 894
 895         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 896         while ((tim_idx < (frame_size - 2)) &&
 897                         (beacon[tim_idx] != WLAN_EID_TIM))
 898                 tim_idx += beacon[tim_idx+1] + 2;
 899
 900         /* If TIM field was found, set variables */
 901         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 902                 *tim_index = cpu_to_le32(tim_idx);
 903                 *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]);
 904         } else {
 905                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 906         }
 907 }
 908
 909 static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size)
 910 {
 911         struct ieee80211_mgmt *mgmt = (void *)beacon;
 912         const u8 *ie;
 913
 914         if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon)))
 915                 return 0;
 916
 917         frame_size -= mgmt->u.beacon.variable - beacon;
 918
 919         ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size);
 920         if (!ie)
 921                 return 0;
 922
 923         return ie - beacon;
 924 }
 925
 926 static u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info,
 927                                            struct ieee80211_vif *vif)
 928 {
 929         u8 rate;
 930
 931         if (info->band == NL80211_BAND_5GHZ || vif->p2p)
 932                 rate = IWL_FIRST_OFDM_RATE;
 933         else
 934                 rate = IWL_FIRST_CCK_RATE;
 935
 936         return rate;
 937 }
 938
 939 static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm,
 940                                     struct ieee80211_vif *vif,
 941                                     struct sk_buff *beacon,
 942                                     struct iwl_tx_cmd *tx)
 943 {
 944         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 945         struct ieee80211_tx_info *info;
 946         u8 rate;
 947         u32 tx_flags;
 948
 949         info = IEEE80211_SKB_CB(beacon);
 950
 951         /* Set up TX command fields */
 952         tx->len = cpu_to_le16((u16)beacon->len);
 953         tx->sta_id = mvmvif->bcast_sta.sta_id;
 954         tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 955         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
 956         tx_flags |=
 957                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
 958                                                 TX_CMD_FLG_BT_PRIO_POS;
 959         tx->tx_flags = cpu_to_le32(tx_flags);
 960
 961         if (!fw_has_capa(&mvm->fw->ucode_capa,
 962                          IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) {
 963                 mvm->mgmt_last_antenna_idx =
 964                         iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 965                                              mvm->mgmt_last_antenna_idx);
 966         }
 967
 968         tx->rate_n_flags =
 969                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 970                             RATE_MCS_ANT_POS);
 971
 972         rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
 973
 974         tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 975         if (rate == IWL_FIRST_CCK_RATE)
 976                 tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 977
 978 }
 979
 980 static int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm,
 981                                             struct sk_buff *beacon,
 982                                             void *data, int len)
 983 {
 984         struct iwl_host_cmd cmd = {
 985                 .id = BEACON_TEMPLATE_CMD,
 986                 .flags = CMD_ASYNC,
 987         };
 988
 989         cmd.len[0] = len;
 990         cmd.data[0] = data;
 991         cmd.dataflags[0] = 0;
 992         cmd.len[1] = beacon->len;
 993         cmd.data[1] = beacon->data;
 994         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
 995
 996         return iwl_mvm_send_cmd(mvm, &cmd);
 997 }
 998
 999 static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm,
1000                                            struct ieee80211_vif *vif,
1001                                            struct sk_buff *beacon)
1002 {
1003         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1004         struct iwl_mac_beacon_cmd_v6 beacon_cmd = {};
1005
1006         iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
1007
1008         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1009
1010         if (vif->type == NL80211_IFTYPE_AP)
1011                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1012                                          &beacon_cmd.tim_size,
1013                                          beacon->data, beacon->len);
1014
1015         return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1016                                                 sizeof(beacon_cmd));
1017 }
1018
1019 static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm,
1020                                            struct ieee80211_vif *vif,
1021                                            struct sk_buff *beacon)
1022 {
1023         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1024         struct iwl_mac_beacon_cmd_v7 beacon_cmd = {};
1025
1026         iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
1027
1028         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1029
1030         if (vif->type == NL80211_IFTYPE_AP)
1031                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1032                                          &beacon_cmd.tim_size,
1033                                          beacon->data, beacon->len);
1034
1035         beacon_cmd.csa_offset =
1036                 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1037                                                    WLAN_EID_CHANNEL_SWITCH,
1038                                                    beacon->len));
1039         beacon_cmd.ecsa_offset =
1040                 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1041                                                    WLAN_EID_EXT_CHANSWITCH_ANN,
1042                                                    beacon->len));
1043
1044         return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1045                                                 sizeof(beacon_cmd));
1046 }
1047
1048 static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm,
1049                                            struct ieee80211_vif *vif,
1050                                            struct sk_buff *beacon)
1051 {
1052         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1053         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon);
1054         struct iwl_mac_beacon_cmd beacon_cmd = {};
1055         u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
1056         u16 flags;
1057
1058         flags = iwl_mvm_mac80211_idx_to_hwrate(rate);
1059
1060         if (rate == IWL_FIRST_CCK_RATE)
1061                 flags |= IWL_MAC_BEACON_CCK;
1062
1063         beacon_cmd.flags = cpu_to_le16(flags);
1064         beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len);
1065         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1066
1067         if (vif->type == NL80211_IFTYPE_AP)
1068                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1069                                          &beacon_cmd.tim_size,
1070                                          beacon->data, beacon->len);
1071
1072         beacon_cmd.csa_offset =
1073                 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1074                                                    WLAN_EID_CHANNEL_SWITCH,
1075                                                    beacon->len));
1076         beacon_cmd.ecsa_offset =
1077                 cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1078                                                    WLAN_EID_EXT_CHANSWITCH_ANN,
1079                                                    beacon->len));
1080
1081         return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1082                                                 sizeof(beacon_cmd));
1083 }
1084
1085 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
1086                                         struct ieee80211_vif *vif,
1087                                         struct sk_buff *beacon)
1088 {
1089         if (WARN_ON(!beacon))
1090                 return -EINVAL;
1091
1092         if (!fw_has_capa(&mvm->fw->ucode_capa,
1093                          IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD))
1094                 return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon);
1095
1096         if (fw_has_api(&mvm->fw->ucode_capa,
1097                        IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE))
1098                 return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon);
1099
1100         return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon);
1101 }
1102
1103 /* The beacon template for the AP/GO/IBSS has changed and needs update */
1104 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
1105                                     struct ieee80211_vif *vif)
1106 {
1107         struct sk_buff *beacon;
1108         int ret;
1109
1110         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1111                 vif->type != NL80211_IFTYPE_ADHOC);
1112
1113         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1114         if (!beacon)
1115                 return -ENOMEM;
1116
1117         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1118         dev_kfree_skb(beacon);
1119         return ret;
1120 }
1121
1122 struct iwl_mvm_mac_ap_iterator_data {
1123         struct iwl_mvm *mvm;
1124         struct ieee80211_vif *vif;
1125         u32 beacon_device_ts;
1126         u16 beacon_int;
1127 };
1128
1129 /* Find the beacon_device_ts and beacon_int for a managed interface */
1130 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1131                                     struct ieee80211_vif *vif)
1132 {
1133         struct iwl_mvm_mac_ap_iterator_data *data = _data;
1134
1135         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1136                 return;
1137
1138         /* Station client has higher priority over P2P client*/
1139         if (vif->p2p && data->beacon_device_ts)
1140                 return;
1141
1142         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1143         data->beacon_int = vif->bss_conf.beacon_int;
1144 }
1145
1146 /*
1147  * Fill the specific data for mac context of type AP of P2P GO
1148  */
1149 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1150                                          struct ieee80211_vif *vif,
1151                                          struct iwl_mac_ctx_cmd *cmd,
1152                                          struct iwl_mac_data_ap *ctxt_ap,
1153                                          bool add)
1154 {
1155         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1156         struct iwl_mvm_mac_ap_iterator_data data = {
1157                 .mvm = mvm,
1158                 .vif = vif,
1159                 .beacon_device_ts = 0
1160         };
1161
1162         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
1163         cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST);
1164
1165         /*
1166          * in AP mode, pass probe requests and beacons from other APs
1167          * (needed for ht protection); when there're no any associated
1168          * station don't ask FW to pass beacons to prevent unnecessary
1169          * wake-ups.
1170          */
1171         cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
1172         if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
1173                 cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
1174                 IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
1175         } else {
1176                 IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
1177         }
1178
1179         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1180         ctxt_ap->bi_reciprocal =
1181                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1182         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1183                                              vif->bss_conf.dtim_period);
1184         ctxt_ap->dtim_reciprocal =
1185                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1186                                                vif->bss_conf.dtim_period));
1187
1188         if (!fw_has_api(&mvm->fw->ucode_capa,
1189                         IWL_UCODE_TLV_API_STA_TYPE))
1190                 ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1191
1192         /*
1193          * Only set the beacon time when the MAC is being added, when we
1194          * just modify the MAC then we should keep the time -- the firmware
1195          * can otherwise have a "jumping" TBTT.
1196          */
1197         if (add) {
1198                 /*
1199                  * If there is a station/P2P client interface which is
1200                  * associated, set the AP's TBTT far enough from the station's
1201                  * TBTT. Otherwise, set it to the current system time
1202                  */
1203                 ieee80211_iterate_active_interfaces_atomic(
1204                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1205                         iwl_mvm_mac_ap_iterator, &data);
1206
1207                 if (data.beacon_device_ts) {
1208                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1209                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1210                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1211                                                      100);
1212                 } else {
1213                         mvmvif->ap_beacon_time =
1214                                 iwl_read_prph(mvm->trans,
1215                                               DEVICE_SYSTEM_TIME_REG);
1216                 }
1217         }
1218
1219         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1220         ctxt_ap->beacon_tsf = 0; /* unused */
1221
1222         /* TODO: Assume that the beacon id == mac context id */
1223         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1224 }
1225
1226 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1227                                    struct ieee80211_vif *vif,
1228                                    u32 action)
1229 {
1230         struct iwl_mac_ctx_cmd cmd = {};
1231
1232         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1233
1234         /* Fill the common data for all mac context types */
1235         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1236
1237         /* Fill the data specific for ap mode */
1238         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap,
1239                                      action == FW_CTXT_ACTION_ADD);
1240
1241         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1242 }
1243
1244 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1245                                    struct ieee80211_vif *vif,
1246                                    u32 action)
1247 {
1248         struct iwl_mac_ctx_cmd cmd = {};
1249         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1250
1251         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1252
1253         /* Fill the common data for all mac context types */
1254         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1255
1256         /* Fill the data specific for GO mode */
1257         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap,
1258                                      action == FW_CTXT_ACTION_ADD);
1259
1260         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1261                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1262         cmd.go.opp_ps_enabled =
1263                         cpu_to_le32(!!(noa->oppps_ctwindow &
1264                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1265
1266         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1267 }
1268
1269 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1270                                 u32 action, bool force_assoc_off,
1271                                 const u8 *bssid_override)
1272 {
1273         switch (vif->type) {
1274         case NL80211_IFTYPE_STATION:
1275                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1276                                                 force_assoc_off,
1277                                                 bssid_override);
1278                 break;
1279         case NL80211_IFTYPE_AP:
1280                 if (!vif->p2p)
1281                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1282                 else
1283                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1284                 break;
1285         case NL80211_IFTYPE_MONITOR:
1286                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1287         case NL80211_IFTYPE_P2P_DEVICE:
1288                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1289         case NL80211_IFTYPE_ADHOC:
1290                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1291         default:
1292                 break;
1293         }
1294
1295         return -EOPNOTSUPP;
1296 }
1297
1298 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1299 {
1300         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1301         int ret;
1302
1303         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1304                       vif->addr, ieee80211_vif_type_p2p(vif)))
1305                 return -EIO;
1306
1307         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1308                                    true, NULL);
1309         if (ret)
1310                 return ret;
1311
1312         /* will only do anything at resume from D3 time */
1313         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1314
1315         mvmvif->uploaded = true;
1316         return 0;
1317 }
1318
1319 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1320                              bool force_assoc_off, const u8 *bssid_override)
1321 {
1322         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1323
1324         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1325                       vif->addr, ieee80211_vif_type_p2p(vif)))
1326                 return -EIO;
1327
1328         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1329                                     force_assoc_off, bssid_override);
1330 }
1331
1332 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1333 {
1334         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1335         struct iwl_mac_ctx_cmd cmd;
1336         int ret;
1337
1338         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1339                       vif->addr, ieee80211_vif_type_p2p(vif)))
1340                 return -EIO;
1341
1342         memset(&cmd, 0, sizeof(cmd));
1343
1344         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1345                                                            mvmvif->color));
1346         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1347
1348         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1349                                    sizeof(cmd), &cmd);
1350         if (ret) {
1351                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1352                 return ret;
1353         }
1354
1355         mvmvif->uploaded = false;
1356
1357         if (vif->type == NL80211_IFTYPE_MONITOR) {
1358                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
1359                 iwl_mvm_dealloc_snif_sta(mvm);
1360         }
1361
1362         return 0;
1363 }
1364
1365 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1366                                    struct ieee80211_vif *csa_vif, u32 gp2,
1367                                    bool tx_success)
1368 {
1369         struct iwl_mvm_vif *mvmvif =
1370                         iwl_mvm_vif_from_mac80211(csa_vif);
1371
1372         /* Don't start to countdown from a failed beacon */
1373         if (!tx_success && !mvmvif->csa_countdown)
1374                 return;
1375
1376         mvmvif->csa_countdown = true;
1377
1378         if (!ieee80211_csa_is_complete(csa_vif)) {
1379                 int c = ieee80211_csa_update_counter(csa_vif);
1380
1381                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1382                 if (csa_vif->p2p &&
1383                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1384                     tx_success) {
1385                         u32 rel_time = (c + 1) *
1386                                        csa_vif->bss_conf.beacon_int -
1387                                        IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1388                         u32 apply_time = gp2 + rel_time * 1024;
1389
1390                         iwl_mvm_schedule_csa_period(mvm, csa_vif,
1391                                          IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1392                                          IWL_MVM_CHANNEL_SWITCH_MARGIN,
1393                                          apply_time);
1394                 }
1395         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1396                 /* we don't have CSA NoA scheduled yet, switch now */
1397                 ieee80211_csa_finish(csa_vif);
1398                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1399         }
1400 }
1401
1402 void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1403                              struct iwl_rx_cmd_buffer *rxb)
1404 {
1405         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1406         struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1407         struct iwl_mvm_tx_resp *beacon_notify_hdr;
1408         struct ieee80211_vif *csa_vif;
1409         struct ieee80211_vif *tx_blocked_vif;
1410         struct agg_tx_status *agg_status;
1411         u16 status;
1412
1413         lockdep_assert_held(&mvm->mutex);
1414
1415         beacon_notify_hdr = &beacon->beacon_notify_hdr;
1416         mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1417         mvm->ibss_manager = beacon->ibss_mgr_status != 0;
1418
1419         agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr);
1420         status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK;
1421         IWL_DEBUG_RX(mvm,
1422                      "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1423                      status, beacon_notify_hdr->failure_frame,
1424                      le64_to_cpu(beacon->tsf),
1425                      mvm->ap_last_beacon_gp2,
1426                      le32_to_cpu(beacon_notify_hdr->initial_rate));
1427
1428         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1429                                             lockdep_is_held(&mvm->mutex));
1430         if (unlikely(csa_vif && csa_vif->csa_active))
1431                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1432                                        (status == TX_STATUS_SUCCESS));
1433
1434         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1435                                                 lockdep_is_held(&mvm->mutex));
1436         if (unlikely(tx_blocked_vif)) {
1437                 struct iwl_mvm_vif *mvmvif =
1438                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1439
1440                 /*
1441                  * The channel switch is started and we have blocked the
1442                  * stations. If this is the first beacon (the timeout wasn't
1443                  * set), set the unblock timeout, otherwise countdown
1444                  */
1445                 if (!mvm->csa_tx_block_bcn_timeout)
1446                         mvm->csa_tx_block_bcn_timeout =
1447                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1448                 else
1449                         mvm->csa_tx_block_bcn_timeout--;
1450
1451                 /* Check if the timeout is expired, and unblock tx */
1452                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1453                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1454                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1455                 }
1456         }
1457 }
1458
1459 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1460                                          struct ieee80211_vif *vif)
1461 {
1462         struct iwl_missed_beacons_notif *missed_beacons = _data;
1463         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1464         struct iwl_mvm *mvm = mvmvif->mvm;
1465         struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
1466         struct iwl_fw_dbg_trigger_tlv *trigger;
1467         u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
1468         u32 rx_missed_bcon, rx_missed_bcon_since_rx;
1469
1470         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1471                 return;
1472
1473         rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons);
1474         rx_missed_bcon_since_rx =
1475                 le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx);
1476         /*
1477          * TODO: the threshold should be adjusted based on latency conditions,
1478          * and/or in case of a CS flow on one of the other AP vifs.
1479          */
1480         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1481              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1482                 ieee80211_beacon_loss(vif);
1483
1484         if (!iwl_fw_dbg_trigger_enabled(mvm->fw,
1485                                         FW_DBG_TRIGGER_MISSED_BEACONS))
1486                 return;
1487
1488         trigger = iwl_fw_dbg_get_trigger(mvm->fw,
1489                                          FW_DBG_TRIGGER_MISSED_BEACONS);
1490         bcon_trig = (void *)trigger->data;
1491         stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
1492         stop_trig_missed_bcon_since_rx =
1493                 le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
1494
1495         /* TODO: implement start trigger */
1496
1497         if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
1498                                            ieee80211_vif_to_wdev(vif),
1499                                            trigger))
1500                 return;
1501
1502         if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
1503             rx_missed_bcon >= stop_trig_missed_bcon)
1504                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL);
1505 }
1506
1507 void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1508                                      struct iwl_rx_cmd_buffer *rxb)
1509 {
1510         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1511         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1512
1513         IWL_DEBUG_INFO(mvm,
1514                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1515                        le32_to_cpu(mb->mac_id),
1516                        le32_to_cpu(mb->consec_missed_beacons),
1517                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1518                        le32_to_cpu(mb->num_recvd_beacons),
1519                        le32_to_cpu(mb->num_expected_beacons));
1520
1521         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1522                                                    IEEE80211_IFACE_ITER_NORMAL,
1523                                                    iwl_mvm_beacon_loss_iterator,
1524                                                    mb);
1525 }
1526
1527 void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
1528                                     struct iwl_rx_cmd_buffer *rxb)
1529 {
1530         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1531         struct iwl_stored_beacon_notif *sb = (void *)pkt->data;
1532         struct ieee80211_rx_status rx_status;
1533         struct sk_buff *skb;
1534         u32 size = le32_to_cpu(sb->byte_count);
1535
1536         if (size == 0)
1537                 return;
1538
1539         skb = alloc_skb(size, GFP_ATOMIC);
1540         if (!skb) {
1541                 IWL_ERR(mvm, "alloc_skb failed\n");
1542                 return;
1543         }
1544
1545         /* update rx_status according to the notification's metadata */
1546         memset(&rx_status, 0, sizeof(rx_status));
1547         rx_status.mactime = le64_to_cpu(sb->tsf);
1548         /* TSF as indicated by the firmware  is at INA time */
1549         rx_status.flag |= RX_FLAG_MACTIME_PLCP_START;
1550         rx_status.device_timestamp = le32_to_cpu(sb->system_time);
1551         rx_status.band =
1552                 (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
1553                                 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1554         rx_status.freq =
1555                 ieee80211_channel_to_frequency(le16_to_cpu(sb->channel),
1556                                                rx_status.band);
1557
1558         /* copy the data */
1559         skb_put_data(skb, sb->data, size);
1560         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1561
1562         /* pass it as regular rx to mac80211 */
1563         ieee80211_rx_napi(mvm->hw, NULL, skb, NULL);
1564 }
1565
1566 void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
1567                                       struct iwl_rx_cmd_buffer *rxb)
1568 {
1569         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1570         struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data;
1571         struct ieee80211_vif *csa_vif;
1572         struct iwl_mvm_vif *mvmvif;
1573         int len = iwl_rx_packet_payload_len(pkt);
1574         u32 id_n_color;
1575
1576         if (WARN_ON_ONCE(len < sizeof(*notif)))
1577                 return;
1578
1579         rcu_read_lock();
1580
1581         csa_vif = rcu_dereference(mvm->csa_vif);
1582         if (WARN_ON(!csa_vif || !csa_vif->csa_active))
1583                 goto out_unlock;
1584
1585         id_n_color = le32_to_cpu(notif->id_and_color);
1586
1587         mvmvif = iwl_mvm_vif_from_mac80211(csa_vif);
1588         if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color,
1589                  "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)",
1590                  FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color))
1591                 goto out_unlock;
1592
1593         IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n");
1594
1595         schedule_delayed_work(&mvm->cs_tx_unblock_dwork,
1596                               msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT *
1597                                                csa_vif->bss_conf.beacon_int));
1598
1599         ieee80211_csa_finish(csa_vif);
1600
1601         rcu_read_unlock();
1602
1603         RCU_INIT_POINTER(mvm->csa_vif, NULL);
1604
1605         return;
1606
1607 out_unlock:
1608         rcu_read_unlock();
1609 }