drivers/net/wireless/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  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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  21  * along with this program; if not, write to the Free Software
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65
  66 #include <linux/etherdevice.h>
  67 #include <net/mac80211.h>
  68 #include "iwl-io.h"
  69 #include "iwl-prph.h"
  70 #include "fw-api.h"
  71 #include "mvm.h"
  72 #include "time-event.h"
  73
  74 const u8 iwl_mvm_ac_to_tx_fifo[] = {
  75         IWL_MVM_TX_FIFO_VO,
  76         IWL_MVM_TX_FIFO_VI,
  77         IWL_MVM_TX_FIFO_BE,
  78         IWL_MVM_TX_FIFO_BK,
  79 };
  80
  81 struct iwl_mvm_mac_iface_iterator_data {
  82         struct iwl_mvm *mvm;
  83         struct ieee80211_vif *vif;
  84         unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  85         unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  86         enum iwl_tsf_id preferred_tsf;
  87         bool found_vif;
  88 };
  89
  90 struct iwl_mvm_hw_queues_iface_iterator_data {
  91         struct ieee80211_vif *exclude_vif;
  92         unsigned long used_hw_queues;
  93 };
  94
  95 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
  96                                     struct ieee80211_vif *vif)
  97 {
  98         struct iwl_mvm_mac_iface_iterator_data *data = _data;
  99         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 100         u16 min_bi;
 101
 102         /* Skip the interface for which we are trying to assign a tsf_id  */
 103         if (vif == data->vif)
 104                 return;
 105
 106         /*
 107          * The TSF is a hardware/firmware resource, there are 4 and
 108          * the driver should assign and free them as needed. However,
 109          * there are cases where 2 MACs should share the same TSF ID
 110          * for the purpose of clock sync, an optimization to avoid
 111          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 112          * client in the system.
 113          *
 114          * The firmware will decide according to the MAC type which
 115          * will be the master and slave. Clients that need to sync
 116          * with a remote station will be the master, and an AP or GO
 117          * will be the slave.
 118          *
 119          * Depending on the new interface type it can be slaved to
 120          * or become the master of an existing interface.
 121          */
 122         switch (data->vif->type) {
 123         case NL80211_IFTYPE_STATION:
 124                 /*
 125                  * The new interface is a client, so if the one we're iterating
 126                  * is an AP, and the beacon interval of the AP is a multiple or
 127                  * divisor of the beacon interval of the client, the same TSF
 128                  * should be used to avoid drift between the new client and
 129                  * existing AP. The existing AP will get drift updates from the
 130                  * new client context in this case.
 131                  */
 132                 if (vif->type != NL80211_IFTYPE_AP ||
 133                     data->preferred_tsf != NUM_TSF_IDS ||
 134                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 135                         break;
 136
 137                 min_bi = min(data->vif->bss_conf.beacon_int,
 138                              vif->bss_conf.beacon_int);
 139
 140                 if (!min_bi)
 141                         break;
 142
 143                 if ((data->vif->bss_conf.beacon_int -
 144                      vif->bss_conf.beacon_int) % min_bi == 0) {
 145                         data->preferred_tsf = mvmvif->tsf_id;
 146                         return;
 147                 }
 148                 break;
 149
 150         case NL80211_IFTYPE_AP:
 151                 /*
 152                  * The new interface is AP/GO, so if its beacon interval is a
 153                  * multiple or a divisor of the beacon interval of an existing
 154                  * interface, it should get drift updates from an existing
 155                  * client or use the same TSF as an existing GO. There's no
 156                  * drift between TSFs internally but if they used different
 157                  * TSFs then a new client MAC could update one of them and
 158                  * cause drift that way.
 159                  */
 160                 if ((vif->type != NL80211_IFTYPE_AP &&
 161                      vif->type != NL80211_IFTYPE_STATION) ||
 162                     data->preferred_tsf != NUM_TSF_IDS ||
 163                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 164                         break;
 165
 166                 min_bi = min(data->vif->bss_conf.beacon_int,
 167                              vif->bss_conf.beacon_int);
 168
 169                 if (!min_bi)
 170                         break;
 171
 172                 if ((data->vif->bss_conf.beacon_int -
 173                      vif->bss_conf.beacon_int) % min_bi == 0) {
 174                         data->preferred_tsf = mvmvif->tsf_id;
 175                         return;
 176                 }
 177                 break;
 178         default:
 179                 /*
 180                  * For all other interface types there's no need to
 181                  * take drift into account. Either they're exclusive
 182                  * like IBSS and monitor, or we don't care much about
 183                  * their TSF (like P2P Device), but we won't be able
 184                  * to share the TSF resource.
 185                  */
 186                 break;
 187         }
 188
 189         /*
 190          * Unless we exited above, we can't share the TSF resource
 191          * that the virtual interface we're iterating over is using
 192          * with the new one, so clear the available bit and if this
 193          * was the preferred one, reset that as well.
 194          */
 195         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 196
 197         if (data->preferred_tsf == mvmvif->tsf_id)
 198                 data->preferred_tsf = NUM_TSF_IDS;
 199 }
 200
 201 /*
 202  * Get the mask of the queues used by the vif
 203  */
 204 u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif)
 205 {
 206         u32 qmask = 0, ac;
 207
 208         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 209                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 210
 211         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 212                 qmask |= BIT(vif->hw_queue[ac]);
 213
 214         if (vif->type == NL80211_IFTYPE_AP)
 215                 qmask |= BIT(vif->cab_queue);
 216
 217         return qmask;
 218 }
 219
 220 static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac,
 221                                          struct ieee80211_vif *vif)
 222 {
 223         struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
 224
 225         /* exclude the given vif */
 226         if (vif == data->exclude_vif)
 227                 return;
 228
 229         data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif);
 230 }
 231
 232 static void iwl_mvm_mac_sta_hw_queues_iter(void *_data,
 233                                            struct ieee80211_sta *sta)
 234 {
 235         struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
 236         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 237
 238         /* Mark the queues used by the sta */
 239         data->used_hw_queues |= mvmsta->tfd_queue_msk;
 240 }
 241
 242 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,
 243                                          struct ieee80211_vif *exclude_vif)
 244 {
 245         struct iwl_mvm_hw_queues_iface_iterator_data data = {
 246                 .exclude_vif = exclude_vif,
 247                 .used_hw_queues =
 248                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 249                         BIT(mvm->aux_queue) |
 250                         BIT(IWL_MVM_CMD_QUEUE),
 251         };
 252
 253         lockdep_assert_held(&mvm->mutex);
 254
 255         /* mark all VIF used hw queues */
 256         ieee80211_iterate_active_interfaces_atomic(
 257                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 258                 iwl_mvm_iface_hw_queues_iter, &data);
 259
 260         /* don't assign the same hw queues as TDLS stations */
 261         ieee80211_iterate_stations_atomic(mvm->hw,
 262                                           iwl_mvm_mac_sta_hw_queues_iter,
 263                                           &data);
 264
 265         return data.used_hw_queues;
 266 }
 267
 268 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 269                                        struct ieee80211_vif *vif)
 270 {
 271         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 272         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 273
 274         /* Iterator may already find the interface being added -- skip it */
 275         if (vif == data->vif) {
 276                 data->found_vif = true;
 277                 return;
 278         }
 279
 280         /* Mark MAC IDs as used by clearing the available bit, and
 281          * (below) mark TSFs as used if their existing use is not
 282          * compatible with the new interface type.
 283          * No locking or atomic bit operations are needed since the
 284          * data is on the stack of the caller function.
 285          */
 286         __clear_bit(mvmvif->id, data->available_mac_ids);
 287
 288         /* find a suitable tsf_id */
 289         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 290 }
 291
 292 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 293                                     struct ieee80211_vif *vif)
 294 {
 295         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 296         struct iwl_mvm_mac_iface_iterator_data data = {
 297                 .mvm = mvm,
 298                 .vif = vif,
 299                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 300                 /* no preference yet */
 301                 .preferred_tsf = NUM_TSF_IDS,
 302         };
 303
 304         ieee80211_iterate_active_interfaces_atomic(
 305                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 306                 iwl_mvm_mac_tsf_id_iter, &data);
 307
 308         if (data.preferred_tsf != NUM_TSF_IDS)
 309                 mvmvif->tsf_id = data.preferred_tsf;
 310         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 311                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 312                                                 NUM_TSF_IDS);
 313 }
 314
 315 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
 316                                                struct ieee80211_vif *vif)
 317 {
 318         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 319         struct iwl_mvm_mac_iface_iterator_data data = {
 320                 .mvm = mvm,
 321                 .vif = vif,
 322                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 323                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 324                 /* no preference yet */
 325                 .preferred_tsf = NUM_TSF_IDS,
 326                 .found_vif = false,
 327         };
 328         u32 ac;
 329         int ret, i;
 330         unsigned long used_hw_queues;
 331
 332         /*
 333          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 334          * and other resources.
 335          */
 336
 337         /*
 338          * Before the iterator, we start with all MAC IDs and TSFs available.
 339          *
 340          * During iteration, all MAC IDs are cleared that are in use by other
 341          * virtual interfaces, and all TSF IDs are cleared that can't be used
 342          * by this new virtual interface because they're used by an interface
 343          * that can't share it with the new one.
 344          * At the same time, we check if there's a preferred TSF in the case
 345          * that we should share it with another interface.
 346          */
 347
 348         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 349         switch (vif->type) {
 350         case NL80211_IFTYPE_ADHOC:
 351                 break;
 352         case NL80211_IFTYPE_STATION:
 353                 if (!vif->p2p)
 354                         break;
 355                 /* fall through */
 356         default:
 357                 __clear_bit(0, data.available_mac_ids);
 358         }
 359
 360         ieee80211_iterate_active_interfaces_atomic(
 361                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 362                 iwl_mvm_mac_iface_iterator, &data);
 363
 364         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif);
 365
 366         /*
 367          * In the case we're getting here during resume, it's similar to
 368          * firmware restart, and with RESUME_ALL the iterator will find
 369          * the vif being added already.
 370          * We don't want to reassign any IDs in either case since doing
 371          * so would probably assign different IDs (as interfaces aren't
 372          * necessarily added in the same order), but the old IDs were
 373          * preserved anyway, so skip ID assignment for both resume and
 374          * recovery.
 375          */
 376         if (data.found_vif)
 377                 return 0;
 378
 379         /* Therefore, in recovery, we can't get here */
 380         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 381                 return -EBUSY;
 382
 383         mvmvif->id = find_first_bit(data.available_mac_ids,
 384                                     NUM_MAC_INDEX_DRIVER);
 385         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 386                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 387                 ret = -EIO;
 388                 goto exit_fail;
 389         }
 390
 391         if (data.preferred_tsf != NUM_TSF_IDS)
 392                 mvmvif->tsf_id = data.preferred_tsf;
 393         else
 394                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 395                                                 NUM_TSF_IDS);
 396         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 397                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 398                 ret = -EIO;
 399                 goto exit_fail;
 400         }
 401
 402         mvmvif->color = 0;
 403
 404         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 405         mvmvif->time_event_data.id = TE_MAX;
 406
 407         /* No need to allocate data queues to P2P Device MAC.*/
 408         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 409                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 410                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 411
 412                 return 0;
 413         }
 414
 415         /* Find available queues, and allocate them to the ACs */
 416         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 417                 u8 queue = find_first_zero_bit(&used_hw_queues,
 418                                                mvm->first_agg_queue);
 419
 420                 if (queue >= mvm->first_agg_queue) {
 421                         IWL_ERR(mvm, "Failed to allocate queue\n");
 422                         ret = -EIO;
 423                         goto exit_fail;
 424                 }
 425
 426                 __set_bit(queue, &used_hw_queues);
 427                 vif->hw_queue[ac] = queue;
 428         }
 429
 430         /* Allocate the CAB queue for softAP and GO interfaces */
 431         if (vif->type == NL80211_IFTYPE_AP) {
 432                 u8 queue = find_first_zero_bit(&used_hw_queues,
 433                                                mvm->first_agg_queue);
 434
 435                 if (queue >= mvm->first_agg_queue) {
 436                         IWL_ERR(mvm, "Failed to allocate cab queue\n");
 437                         ret = -EIO;
 438                         goto exit_fail;
 439                 }
 440
 441                 vif->cab_queue = queue;
 442         } else {
 443                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 444         }
 445
 446         mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT;
 447         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 448
 449         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 450                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 451
 452         return 0;
 453
 454 exit_fail:
 455         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 456         memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 457         vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 458         return ret;
 459 }
 460
 461 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 462 {
 463         u32 ac;
 464         int ret;
 465
 466         lockdep_assert_held(&mvm->mutex);
 467
 468         ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif);
 469         if (ret)
 470                 return ret;
 471
 472         switch (vif->type) {
 473         case NL80211_IFTYPE_P2P_DEVICE:
 474                 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 475                                       IWL_MVM_TX_FIFO_VO);
 476                 break;
 477         case NL80211_IFTYPE_AP:
 478                 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue,
 479                                       IWL_MVM_TX_FIFO_MCAST);
 480                 /* fall through */
 481         default:
 482                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 483                         iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac],
 484                                               iwl_mvm_ac_to_tx_fifo[ac]);
 485                 break;
 486         }
 487
 488         return 0;
 489 }
 490
 491 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 492 {
 493         int ac;
 494
 495         lockdep_assert_held(&mvm->mutex);
 496
 497         switch (vif->type) {
 498         case NL80211_IFTYPE_P2P_DEVICE:
 499                 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE);
 500                 break;
 501         case NL80211_IFTYPE_AP:
 502                 iwl_mvm_disable_txq(mvm, vif->cab_queue);
 503                 /* fall through */
 504         default:
 505                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 506                         iwl_mvm_disable_txq(mvm, vif->hw_queue[ac]);
 507         }
 508 }
 509
 510 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 511                               struct ieee80211_vif *vif,
 512                               enum ieee80211_band band,
 513                               u8 *cck_rates, u8 *ofdm_rates)
 514 {
 515         struct ieee80211_supported_band *sband;
 516         unsigned long basic = vif->bss_conf.basic_rates;
 517         int lowest_present_ofdm = 100;
 518         int lowest_present_cck = 100;
 519         u8 cck = 0;
 520         u8 ofdm = 0;
 521         int i;
 522
 523         sband = mvm->hw->wiphy->bands[band];
 524
 525         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 526                 int hw = sband->bitrates[i].hw_value;
 527                 if (hw >= IWL_FIRST_OFDM_RATE) {
 528                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 529                         if (lowest_present_ofdm > hw)
 530                                 lowest_present_ofdm = hw;
 531                 } else {
 532                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 533
 534                         cck |= BIT(hw);
 535                         if (lowest_present_cck > hw)
 536                                 lowest_present_cck = hw;
 537                 }
 538         }
 539
 540         /*
 541          * Now we've got the basic rates as bitmaps in the ofdm and cck
 542          * variables. This isn't sufficient though, as there might not
 543          * be all the right rates in the bitmap. E.g. if the only basic
 544          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 545          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 546          *
 547          *    [...] a STA responding to a received frame shall transmit
 548          *    its Control Response frame [...] at the highest rate in the
 549          *    BSSBasicRateSet parameter that is less than or equal to the
 550          *    rate of the immediately previous frame in the frame exchange
 551          *    sequence ([...]) and that is of the same modulation class
 552          *    ([...]) as the received frame. If no rate contained in the
 553          *    BSSBasicRateSet parameter meets these conditions, then the
 554          *    control frame sent in response to a received frame shall be
 555          *    transmitted at the highest mandatory rate of the PHY that is
 556          *    less than or equal to the rate of the received frame, and
 557          *    that is of the same modulation class as the received frame.
 558          *
 559          * As a consequence, we need to add all mandatory rates that are
 560          * lower than all of the basic rates to these bitmaps.
 561          */
 562
 563         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 564                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 565         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 566                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 567         /* 6M already there or needed so always add */
 568         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 569
 570         /*
 571          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 572          * Note, however:
 573          *  - if no CCK rates are basic, it must be ERP since there must
 574          *    be some basic rates at all, so they're OFDM => ERP PHY
 575          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 576          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 577          *  - if 5.5M is basic, 1M and 2M are mandatory
 578          *  - if 2M is basic, 1M is mandatory
 579          *  - if 1M is basic, that's the only valid ACK rate.
 580          * As a consequence, it's not as complicated as it sounds, just add
 581          * any lower rates to the ACK rate bitmap.
 582          */
 583         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 584                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 585         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 586                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 587         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 588                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 589         /* 1M already there or needed so always add */
 590         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 591
 592         *cck_rates = cck;
 593         *ofdm_rates = ofdm;
 594 }
 595
 596 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 597                                          struct ieee80211_vif *vif,
 598                                          struct iwl_mac_ctx_cmd *cmd)
 599 {
 600         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 601         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 602                                  IEEE80211_HT_OP_MODE_PROTECTION;
 603         /* The fw does not distinguish between ht and fat */
 604         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 605
 606         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 607         /*
 608          * See section 9.23.3.1 of IEEE 80211-2012.
 609          * Nongreenfield HT STAs Present is not supported.
 610          */
 611         switch (protection_mode) {
 612         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 613                 break;
 614         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 615         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 616                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 617                 break;
 618         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 619                 /* Protect when channel wider than 20MHz */
 620                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 621                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 622                 break;
 623         default:
 624                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 625                         protection_mode);
 626                 break;
 627         }
 628 }
 629
 630 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 631                                         struct ieee80211_vif *vif,
 632                                         struct iwl_mac_ctx_cmd *cmd,
 633                                         const u8 *bssid_override,
 634                                         u32 action)
 635 {
 636         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 637         struct ieee80211_chanctx_conf *chanctx;
 638         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 639                              IEEE80211_HT_OP_MODE_PROTECTION);
 640         u8 cck_ack_rates, ofdm_ack_rates;
 641         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 642         int i;
 643
 644         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 645                                                             mvmvif->color));
 646         cmd->action = cpu_to_le32(action);
 647
 648         switch (vif->type) {
 649         case NL80211_IFTYPE_STATION:
 650                 if (vif->p2p)
 651                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 652                 else
 653                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 654                 break;
 655         case NL80211_IFTYPE_AP:
 656                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 657                 break;
 658         case NL80211_IFTYPE_MONITOR:
 659                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 660                 break;
 661         case NL80211_IFTYPE_P2P_DEVICE:
 662                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 663                 break;
 664         case NL80211_IFTYPE_ADHOC:
 665                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 666                 break;
 667         default:
 668                 WARN_ON_ONCE(1);
 669         }
 670
 671         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 672
 673         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 674
 675         if (bssid)
 676                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 677         else
 678                 eth_broadcast_addr(cmd->bssid_addr);
 679
 680         rcu_read_lock();
 681         chanctx = rcu_dereference(vif->chanctx_conf);
 682         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 683                                             : IEEE80211_BAND_2GHZ,
 684                           &cck_ack_rates, &ofdm_ack_rates);
 685         rcu_read_unlock();
 686
 687         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 688         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 689
 690         cmd->cck_short_preamble =
 691                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 692                             MAC_FLG_SHORT_PREAMBLE : 0);
 693         cmd->short_slot =
 694                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 695                             MAC_FLG_SHORT_SLOT : 0);
 696
 697         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 698                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 699
 700                 cmd->ac[txf].cw_min =
 701                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 702                 cmd->ac[txf].cw_max =
 703                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 704                 cmd->ac[txf].edca_txop =
 705                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 706                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 707                 cmd->ac[txf].fifos_mask = BIT(txf);
 708         }
 709
 710         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 711         if (vif->type == NL80211_IFTYPE_AP)
 712                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 713                         BIT(IWL_MVM_TX_FIFO_MCAST);
 714
 715         if (vif->bss_conf.qos)
 716                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 717
 718         if (vif->bss_conf.use_cts_prot)
 719                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 720
 721         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 722                        vif->bss_conf.use_cts_prot,
 723                        vif->bss_conf.ht_operation_mode);
 724         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 725                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 726         if (ht_enabled)
 727                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 728
 729         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 730 }
 731
 732 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 733                                      struct iwl_mac_ctx_cmd *cmd)
 734 {
 735         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 736                                        sizeof(*cmd), cmd);
 737         if (ret)
 738                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 739                         le32_to_cpu(cmd->action), ret);
 740         return ret;
 741 }
 742
 743 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 744                                     struct ieee80211_vif *vif,
 745                                     u32 action, bool force_assoc_off,
 746                                     const u8 *bssid_override)
 747 {
 748         struct iwl_mac_ctx_cmd cmd = {};
 749         struct iwl_mac_data_sta *ctxt_sta;
 750
 751         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 752
 753         /* Fill the common data for all mac context types */
 754         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 755
 756         if (vif->p2p) {
 757                 struct ieee80211_p2p_noa_attr *noa =
 758                         &vif->bss_conf.p2p_noa_attr;
 759
 760                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 761                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 762                 ctxt_sta = &cmd.p2p_sta.sta;
 763         } else {
 764                 ctxt_sta = &cmd.sta;
 765         }
 766
 767         /* We need the dtim_period to set the MAC as associated */
 768         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 769             !force_assoc_off) {
 770                 u32 dtim_offs;
 771
 772                 /*
 773                  * The DTIM count counts down, so when it is N that means N
 774                  * more beacon intervals happen until the DTIM TBTT. Therefore
 775                  * add this to the current time. If that ends up being in the
 776                  * future, the firmware will handle it.
 777                  *
 778                  * Also note that the system_timestamp (which we get here as
 779                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 780                  * same offset in the frame -- the TSF is at the first symbol
 781                  * of the TSF, the system timestamp is at signal acquisition
 782                  * time. This means there's an offset between them of at most
 783                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 784                  * 384us in the longest case), this is currently not relevant
 785                  * as the firmware wakes up around 2ms before the TBTT.
 786                  */
 787                 dtim_offs = vif->bss_conf.sync_dtim_count *
 788                                 vif->bss_conf.beacon_int;
 789                 /* convert TU to usecs */
 790                 dtim_offs *= 1024;
 791
 792                 ctxt_sta->dtim_tsf =
 793                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 794                 ctxt_sta->dtim_time =
 795                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 796
 797                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 798                                le64_to_cpu(ctxt_sta->dtim_tsf),
 799                                le32_to_cpu(ctxt_sta->dtim_time),
 800                                dtim_offs);
 801
 802                 ctxt_sta->is_assoc = cpu_to_le32(1);
 803         } else {
 804                 ctxt_sta->is_assoc = cpu_to_le32(0);
 805
 806                 /* Allow beacons to pass through as long as we are not
 807                  * associated, or we do not have dtim period information.
 808                  */
 809                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 810         }
 811
 812         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 813         ctxt_sta->bi_reciprocal =
 814                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 815         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 816                                               vif->bss_conf.dtim_period);
 817         ctxt_sta->dtim_reciprocal =
 818                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 819                                                vif->bss_conf.dtim_period));
 820
 821         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 822         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 823
 824         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 825 }
 826
 827 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 828                                          struct ieee80211_vif *vif,
 829                                          u32 action)
 830 {
 831         struct iwl_mac_ctx_cmd cmd = {};
 832
 833         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 834
 835         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 836
 837         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 838                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 839                                        MAC_FILTER_IN_BEACON |
 840                                        MAC_FILTER_IN_PROBE_REQUEST |
 841                                        MAC_FILTER_IN_CRC32);
 842         mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
 843
 844         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 845 }
 846
 847 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 848                                      struct ieee80211_vif *vif,
 849                                      u32 action)
 850 {
 851         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 852         struct iwl_mac_ctx_cmd cmd = {};
 853
 854         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 855
 856         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 857
 858         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 859                                        MAC_FILTER_IN_PROBE_REQUEST);
 860
 861         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 862         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 863         cmd.ibss.bi_reciprocal =
 864                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 865
 866         /* TODO: Assumes that the beacon id == mac context id */
 867         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 868
 869         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 870 }
 871
 872 struct iwl_mvm_go_iterator_data {
 873         bool go_active;
 874 };
 875
 876 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 877 {
 878         struct iwl_mvm_go_iterator_data *data = _data;
 879         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 880
 881         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 882             mvmvif->ap_ibss_active)
 883                 data->go_active = true;
 884 }
 885
 886 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 887                                            struct ieee80211_vif *vif,
 888                                            u32 action)
 889 {
 890         struct iwl_mac_ctx_cmd cmd = {};
 891         struct iwl_mvm_go_iterator_data data = {};
 892
 893         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 894
 895         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 896
 897         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 898
 899         /* Override the filter flags to accept only probe requests */
 900         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 901
 902         /*
 903          * This flag should be set to true when the P2P Device is
 904          * discoverable and there is at least another active P2P GO. Settings
 905          * this flag will allow the P2P Device to be discoverable on other
 906          * channels in addition to its listen channel.
 907          * Note that this flag should not be set in other cases as it opens the
 908          * Rx filters on all MAC and increases the number of interrupts.
 909          */
 910         ieee80211_iterate_active_interfaces_atomic(
 911                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 912                 iwl_mvm_go_iterator, &data);
 913
 914         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 915         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 916 }
 917
 918 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 919                                      struct iwl_mac_beacon_cmd *beacon_cmd,
 920                                      u8 *beacon, u32 frame_size)
 921 {
 922         u32 tim_idx;
 923         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 924
 925         /* The index is relative to frame start but we start looking at the
 926          * variable-length part of the beacon. */
 927         tim_idx = mgmt->u.beacon.variable - beacon;
 928
 929         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 930         while ((tim_idx < (frame_size - 2)) &&
 931                         (beacon[tim_idx] != WLAN_EID_TIM))
 932                 tim_idx += beacon[tim_idx+1] + 2;
 933
 934         /* If TIM field was found, set variables */
 935         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 936                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
 937                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
 938         } else {
 939                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 940         }
 941 }
 942
 943 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
 944                                         struct ieee80211_vif *vif,
 945                                         struct sk_buff *beacon)
 946 {
 947         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 948         struct iwl_host_cmd cmd = {
 949                 .id = BEACON_TEMPLATE_CMD,
 950                 .flags = CMD_ASYNC,
 951         };
 952         struct iwl_mac_beacon_cmd beacon_cmd = {};
 953         struct ieee80211_tx_info *info;
 954         u32 beacon_skb_len;
 955         u32 rate, tx_flags;
 956
 957         if (WARN_ON(!beacon))
 958                 return -EINVAL;
 959
 960         beacon_skb_len = beacon->len;
 961
 962         /* TODO: for now the beacon template id is set to be the mac context id.
 963          * Might be better to handle it as another resource ... */
 964         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 965         info = IEEE80211_SKB_CB(beacon);
 966
 967         /* Set up TX command fields */
 968         beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
 969         beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
 970         beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 971         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
 972         tx_flags |=
 973                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
 974                                                 TX_CMD_FLG_BT_PRIO_POS;
 975         beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags);
 976
 977         mvm->mgmt_last_antenna_idx =
 978                 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
 979                                      mvm->mgmt_last_antenna_idx);
 980
 981         beacon_cmd.tx.rate_n_flags =
 982                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 983                             RATE_MCS_ANT_POS);
 984
 985         if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) {
 986                 rate = IWL_FIRST_OFDM_RATE;
 987         } else {
 988                 rate = IWL_FIRST_CCK_RATE;
 989                 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 990         }
 991         beacon_cmd.tx.rate_n_flags |=
 992                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 993
 994         /* Set up TX beacon command fields */
 995         if (vif->type == NL80211_IFTYPE_AP)
 996                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
 997                                          beacon->data,
 998                                          beacon_skb_len);
 999
1000         /* Submit command */
1001         cmd.len[0] = sizeof(beacon_cmd);
1002         cmd.data[0] = &beacon_cmd;
1003         cmd.dataflags[0] = 0;
1004         cmd.len[1] = beacon_skb_len;
1005         cmd.data[1] = beacon->data;
1006         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
1007
1008         return iwl_mvm_send_cmd(mvm, &cmd);
1009 }
1010
1011 /* The beacon template for the AP/GO/IBSS has changed and needs update */
1012 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
1013                                     struct ieee80211_vif *vif)
1014 {
1015         struct sk_buff *beacon;
1016         int ret;
1017
1018         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1019                 vif->type != NL80211_IFTYPE_ADHOC);
1020
1021         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1022         if (!beacon)
1023                 return -ENOMEM;
1024
1025         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1026         dev_kfree_skb(beacon);
1027         return ret;
1028 }
1029
1030 struct iwl_mvm_mac_ap_iterator_data {
1031         struct iwl_mvm *mvm;
1032         struct ieee80211_vif *vif;
1033         u32 beacon_device_ts;
1034         u16 beacon_int;
1035 };
1036
1037 /* Find the beacon_device_ts and beacon_int for a managed interface */
1038 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1039                                     struct ieee80211_vif *vif)
1040 {
1041         struct iwl_mvm_mac_ap_iterator_data *data = _data;
1042
1043         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1044                 return;
1045
1046         /* Station client has higher priority over P2P client*/
1047         if (vif->p2p && data->beacon_device_ts)
1048                 return;
1049
1050         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1051         data->beacon_int = vif->bss_conf.beacon_int;
1052 }
1053
1054 /*
1055  * Fill the specific data for mac context of type AP of P2P GO
1056  */
1057 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1058                                          struct ieee80211_vif *vif,
1059                                          struct iwl_mac_data_ap *ctxt_ap,
1060                                          bool add)
1061 {
1062         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1063         struct iwl_mvm_mac_ap_iterator_data data = {
1064                 .mvm = mvm,
1065                 .vif = vif,
1066                 .beacon_device_ts = 0
1067         };
1068
1069         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1070         ctxt_ap->bi_reciprocal =
1071                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1072         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1073                                              vif->bss_conf.dtim_period);
1074         ctxt_ap->dtim_reciprocal =
1075                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1076                                                vif->bss_conf.dtim_period));
1077
1078         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1079
1080         /*
1081          * Only set the beacon time when the MAC is being added, when we
1082          * just modify the MAC then we should keep the time -- the firmware
1083          * can otherwise have a "jumping" TBTT.
1084          */
1085         if (add) {
1086                 /*
1087                  * If there is a station/P2P client interface which is
1088                  * associated, set the AP's TBTT far enough from the station's
1089                  * TBTT. Otherwise, set it to the current system time
1090                  */
1091                 ieee80211_iterate_active_interfaces_atomic(
1092                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1093                         iwl_mvm_mac_ap_iterator, &data);
1094
1095                 if (data.beacon_device_ts) {
1096                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1097                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1098                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1099                                                      100);
1100                 } else {
1101                         mvmvif->ap_beacon_time =
1102                                 iwl_read_prph(mvm->trans,
1103                                               DEVICE_SYSTEM_TIME_REG);
1104                 }
1105         }
1106
1107         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1108         ctxt_ap->beacon_tsf = 0; /* unused */
1109
1110         /* TODO: Assume that the beacon id == mac context id */
1111         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1112 }
1113
1114 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1115                                    struct ieee80211_vif *vif,
1116                                    u32 action)
1117 {
1118         struct iwl_mac_ctx_cmd cmd = {};
1119
1120         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1121
1122         /* Fill the common data for all mac context types */
1123         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1124
1125         /*
1126          * pass probe requests and beacons from other APs (needed
1127          * for ht protection)
1128          */
1129         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1130                                         MAC_FILTER_IN_BEACON);
1131
1132         /* Fill the data specific for ap mode */
1133         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1134                                      action == FW_CTXT_ACTION_ADD);
1135
1136         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1137 }
1138
1139 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1140                                    struct ieee80211_vif *vif,
1141                                    u32 action)
1142 {
1143         struct iwl_mac_ctx_cmd cmd = {};
1144         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1145
1146         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1147
1148         /* Fill the common data for all mac context types */
1149         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1150
1151         /*
1152          * pass probe requests and beacons from other APs (needed
1153          * for ht protection)
1154          */
1155         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1156                                         MAC_FILTER_IN_BEACON);
1157
1158         /* Fill the data specific for GO mode */
1159         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1160                                      action == FW_CTXT_ACTION_ADD);
1161
1162         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1163                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1164         cmd.go.opp_ps_enabled =
1165                         cpu_to_le32(!!(noa->oppps_ctwindow &
1166                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1167
1168         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1169 }
1170
1171 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1172                                 u32 action, bool force_assoc_off,
1173                                 const u8 *bssid_override)
1174 {
1175         switch (vif->type) {
1176         case NL80211_IFTYPE_STATION:
1177                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1178                                                 force_assoc_off,
1179                                                 bssid_override);
1180                 break;
1181         case NL80211_IFTYPE_AP:
1182                 if (!vif->p2p)
1183                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1184                 else
1185                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1186                 break;
1187         case NL80211_IFTYPE_MONITOR:
1188                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1189         case NL80211_IFTYPE_P2P_DEVICE:
1190                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1191         case NL80211_IFTYPE_ADHOC:
1192                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1193         default:
1194                 break;
1195         }
1196
1197         return -EOPNOTSUPP;
1198 }
1199
1200 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1201 {
1202         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1203         int ret;
1204
1205         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1206                       vif->addr, ieee80211_vif_type_p2p(vif)))
1207                 return -EIO;
1208
1209         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1210                                    true, NULL);
1211         if (ret)
1212                 return ret;
1213
1214         /* will only do anything at resume from D3 time */
1215         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1216
1217         mvmvif->uploaded = true;
1218         return 0;
1219 }
1220
1221 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1222                              bool force_assoc_off, const u8 *bssid_override)
1223 {
1224         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1225
1226         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1227                       vif->addr, ieee80211_vif_type_p2p(vif)))
1228                 return -EIO;
1229
1230         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1231                                     force_assoc_off, bssid_override);
1232 }
1233
1234 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1235 {
1236         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1237         struct iwl_mac_ctx_cmd cmd;
1238         int ret;
1239
1240         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1241                       vif->addr, ieee80211_vif_type_p2p(vif)))
1242                 return -EIO;
1243
1244         memset(&cmd, 0, sizeof(cmd));
1245
1246         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1247                                                            mvmvif->color));
1248         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1249
1250         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1251                                    sizeof(cmd), &cmd);
1252         if (ret) {
1253                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1254                 return ret;
1255         }
1256
1257         mvmvif->uploaded = false;
1258
1259         if (vif->type == NL80211_IFTYPE_MONITOR)
1260                 mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1261
1262         return 0;
1263 }
1264
1265 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1266                                    struct ieee80211_vif *csa_vif, u32 gp2,
1267                                    bool tx_success)
1268 {
1269         struct iwl_mvm_vif *mvmvif =
1270                         iwl_mvm_vif_from_mac80211(csa_vif);
1271
1272         /* Don't start to countdown from a failed beacon */
1273         if (!tx_success && !mvmvif->csa_countdown)
1274                 return;
1275
1276         mvmvif->csa_countdown = true;
1277
1278         if (!ieee80211_csa_is_complete(csa_vif)) {
1279                 int c = ieee80211_csa_update_counter(csa_vif);
1280
1281                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1282                 if (csa_vif->p2p &&
1283                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1284                     tx_success) {
1285                         u32 rel_time = (c + 1) *
1286                                        csa_vif->bss_conf.beacon_int -
1287                                        IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1288                         u32 apply_time = gp2 + rel_time * 1024;
1289
1290                         iwl_mvm_schedule_csa_period(mvm, csa_vif,
1291                                          IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1292                                          IWL_MVM_CHANNEL_SWITCH_MARGIN,
1293                                          apply_time);
1294                 }
1295         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1296                 /* we don't have CSA NoA scheduled yet, switch now */
1297                 ieee80211_csa_finish(csa_vif);
1298                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1299         }
1300 }
1301
1302 int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1303                             struct iwl_rx_cmd_buffer *rxb,
1304                             struct iwl_device_cmd *cmd)
1305 {
1306         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1307         struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1308         struct iwl_mvm_tx_resp *beacon_notify_hdr;
1309         struct ieee80211_vif *csa_vif;
1310         struct ieee80211_vif *tx_blocked_vif;
1311         u16 status;
1312
1313         lockdep_assert_held(&mvm->mutex);
1314
1315         beacon_notify_hdr = &beacon->beacon_notify_hdr;
1316         mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1317
1318         status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK;
1319         IWL_DEBUG_RX(mvm,
1320                      "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1321                      status, beacon_notify_hdr->failure_frame,
1322                      le64_to_cpu(beacon->tsf),
1323                      mvm->ap_last_beacon_gp2,
1324                      le32_to_cpu(beacon_notify_hdr->initial_rate));
1325
1326         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1327                                             lockdep_is_held(&mvm->mutex));
1328         if (unlikely(csa_vif && csa_vif->csa_active))
1329                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1330                                        (status == TX_STATUS_SUCCESS));
1331
1332         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1333                                                 lockdep_is_held(&mvm->mutex));
1334         if (unlikely(tx_blocked_vif)) {
1335                 struct iwl_mvm_vif *mvmvif =
1336                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1337
1338                 /*
1339                  * The channel switch is started and we have blocked the
1340                  * stations. If this is the first beacon (the timeout wasn't
1341                  * set), set the unblock timeout, otherwise countdown
1342                  */
1343                 if (!mvm->csa_tx_block_bcn_timeout)
1344                         mvm->csa_tx_block_bcn_timeout =
1345                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1346                 else
1347                         mvm->csa_tx_block_bcn_timeout--;
1348
1349                 /* Check if the timeout is expired, and unblock tx */
1350                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1351                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1352                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1353                 }
1354         }
1355
1356         return 0;
1357 }
1358
1359 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1360                                          struct ieee80211_vif *vif)
1361 {
1362         struct iwl_missed_beacons_notif *missed_beacons = _data;
1363         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1364
1365         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1366                 return;
1367
1368         /*
1369          * TODO: the threshold should be adjusted based on latency conditions,
1370          * and/or in case of a CS flow on one of the other AP vifs.
1371          */
1372         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1373              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1374                 ieee80211_beacon_loss(vif);
1375 }
1376
1377 int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1378                                     struct iwl_rx_cmd_buffer *rxb,
1379                                     struct iwl_device_cmd *cmd)
1380 {
1381         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1382         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1383
1384         IWL_DEBUG_INFO(mvm,
1385                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1386                        le32_to_cpu(mb->mac_id),
1387                        le32_to_cpu(mb->consec_missed_beacons),
1388                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1389                        le32_to_cpu(mb->num_recvd_beacons),
1390                        le32_to_cpu(mb->num_expected_beacons));
1391
1392         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1393                                                    IEEE80211_IFACE_ITER_NORMAL,
1394                                                    iwl_mvm_beacon_loss_iterator,
1395                                                    mb);
1396         return 0;
1397 }