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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  23  * USA
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  26  * in the file called COPYING.
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  28  * Contact Information:
  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         u32 used_hw_queues;
  87         enum iwl_tsf_id preferred_tsf;
  88         bool found_vif;
  89 };
  90
  91 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
  92                                     struct ieee80211_vif *vif)
  93 {
  94         struct iwl_mvm_mac_iface_iterator_data *data = _data;
  95         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  96         u16 min_bi;
  97
  98         /* Skip the interface for which we are trying to assign a tsf_id  */
  99         if (vif == data->vif)
 100                 return;
 101
 102         /*
 103          * The TSF is a hardware/firmware resource, there are 4 and
 104          * the driver should assign and free them as needed. However,
 105          * there are cases where 2 MACs should share the same TSF ID
 106          * for the purpose of clock sync, an optimization to avoid
 107          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 108          * client in the system.
 109          *
 110          * The firmware will decide according to the MAC type which
 111          * will be the master and slave. Clients that need to sync
 112          * with a remote station will be the master, and an AP or GO
 113          * will be the slave.
 114          *
 115          * Depending on the new interface type it can be slaved to
 116          * or become the master of an existing interface.
 117          */
 118         switch (data->vif->type) {
 119         case NL80211_IFTYPE_STATION:
 120                 /*
 121                  * The new interface is a client, so if the one we're iterating
 122                  * is an AP, and the beacon interval of the AP is a multiple or
 123                  * divisor of the beacon interval of the client, the same TSF
 124                  * should be used to avoid drift between the new client and
 125                  * existing AP. The existing AP will get drift updates from the
 126                  * new client context in this case.
 127                  */
 128                 if (vif->type != NL80211_IFTYPE_AP ||
 129                     data->preferred_tsf != NUM_TSF_IDS ||
 130                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 131                         break;
 132
 133                 min_bi = min(data->vif->bss_conf.beacon_int,
 134                              vif->bss_conf.beacon_int);
 135
 136                 if (!min_bi)
 137                         break;
 138
 139                 if ((data->vif->bss_conf.beacon_int -
 140                      vif->bss_conf.beacon_int) % min_bi == 0) {
 141                         data->preferred_tsf = mvmvif->tsf_id;
 142                         return;
 143                 }
 144                 break;
 145
 146         case NL80211_IFTYPE_AP:
 147                 /*
 148                  * The new interface is AP/GO, so if its beacon interval is a
 149                  * multiple or a divisor of the beacon interval of an existing
 150                  * interface, it should get drift updates from an existing
 151                  * client or use the same TSF as an existing GO. There's no
 152                  * drift between TSFs internally but if they used different
 153                  * TSFs then a new client MAC could update one of them and
 154                  * cause drift that way.
 155                  */
 156                 if ((vif->type != NL80211_IFTYPE_AP &&
 157                      vif->type != NL80211_IFTYPE_STATION) ||
 158                     data->preferred_tsf != NUM_TSF_IDS ||
 159                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 160                         break;
 161
 162                 min_bi = min(data->vif->bss_conf.beacon_int,
 163                              vif->bss_conf.beacon_int);
 164
 165                 if (!min_bi)
 166                         break;
 167
 168                 if ((data->vif->bss_conf.beacon_int -
 169                      vif->bss_conf.beacon_int) % min_bi == 0) {
 170                         data->preferred_tsf = mvmvif->tsf_id;
 171                         return;
 172                 }
 173                 break;
 174         default:
 175                 /*
 176                  * For all other interface types there's no need to
 177                  * take drift into account. Either they're exclusive
 178                  * like IBSS and monitor, or we don't care much about
 179                  * their TSF (like P2P Device), but we won't be able
 180                  * to share the TSF resource.
 181                  */
 182                 break;
 183         }
 184
 185         /*
 186          * Unless we exited above, we can't share the TSF resource
 187          * that the virtual interface we're iterating over is using
 188          * with the new one, so clear the available bit and if this
 189          * was the preferred one, reset that as well.
 190          */
 191         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 192
 193         if (data->preferred_tsf == mvmvif->tsf_id)
 194                 data->preferred_tsf = NUM_TSF_IDS;
 195 }
 196
 197 /*
 198  * Get the mask of the queues used by the vif
 199  */
 200 u32 iwl_mvm_mac_get_queues_mask(struct iwl_mvm *mvm,
 201                                 struct ieee80211_vif *vif)
 202 {
 203         u32 qmask = 0, ac;
 204
 205         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 206                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 207
 208         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 209                 qmask |= BIT(vif->hw_queue[ac]);
 210
 211         if (vif->type == NL80211_IFTYPE_AP)
 212                 qmask |= BIT(vif->cab_queue);
 213
 214         return qmask;
 215 }
 216
 217 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 218                                        struct ieee80211_vif *vif)
 219 {
 220         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 221         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 222
 223         /* Iterator may already find the interface being added -- skip it */
 224         if (vif == data->vif) {
 225                 data->found_vif = true;
 226                 return;
 227         }
 228
 229         /* Mark the queues used by the vif */
 230         data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(data->mvm, vif);
 231
 232         /* Mark MAC IDs as used by clearing the available bit, and
 233          * (below) mark TSFs as used if their existing use is not
 234          * compatible with the new interface type.
 235          * No locking or atomic bit operations are needed since the
 236          * data is on the stack of the caller function.
 237          */
 238         __clear_bit(mvmvif->id, data->available_mac_ids);
 239
 240         /* find a suitable tsf_id */
 241         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 242 }
 243
 244 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 245                                     struct ieee80211_vif *vif)
 246 {
 247         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 248         struct iwl_mvm_mac_iface_iterator_data data = {
 249                 .mvm = mvm,
 250                 .vif = vif,
 251                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 252                 /* no preference yet */
 253                 .preferred_tsf = NUM_TSF_IDS,
 254         };
 255
 256         ieee80211_iterate_active_interfaces_atomic(
 257                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 258                 iwl_mvm_mac_tsf_id_iter, &data);
 259
 260         if (data.preferred_tsf != NUM_TSF_IDS)
 261                 mvmvif->tsf_id = data.preferred_tsf;
 262         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 263                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 264                                                 NUM_TSF_IDS);
 265 }
 266
 267 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
 268                                                struct ieee80211_vif *vif)
 269 {
 270         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 271         struct iwl_mvm_mac_iface_iterator_data data = {
 272                 .mvm = mvm,
 273                 .vif = vif,
 274                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 275                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 276                 /* no preference yet */
 277                 .preferred_tsf = NUM_TSF_IDS,
 278                 .used_hw_queues =
 279                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 280                         BIT(mvm->aux_queue) |
 281                         BIT(IWL_MVM_CMD_QUEUE),
 282                 .found_vif = false,
 283         };
 284         u32 ac;
 285         int ret, i;
 286         unsigned long used_hw_queues;
 287
 288         /*
 289          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 290          * and other resources.
 291          */
 292
 293         /*
 294          * Before the iterator, we start with all MAC IDs and TSFs available.
 295          *
 296          * During iteration, all MAC IDs are cleared that are in use by other
 297          * virtual interfaces, and all TSF IDs are cleared that can't be used
 298          * by this new virtual interface because they're used by an interface
 299          * that can't share it with the new one.
 300          * At the same time, we check if there's a preferred TSF in the case
 301          * that we should share it with another interface.
 302          */
 303
 304         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 305         switch (vif->type) {
 306         case NL80211_IFTYPE_ADHOC:
 307                 break;
 308         case NL80211_IFTYPE_STATION:
 309                 if (!vif->p2p)
 310                         break;
 311                 /* fall through */
 312         default:
 313                 __clear_bit(0, data.available_mac_ids);
 314         }
 315
 316         ieee80211_iterate_active_interfaces_atomic(
 317                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 318                 iwl_mvm_mac_iface_iterator, &data);
 319
 320         /*
 321          * In the case we're getting here during resume, it's similar to
 322          * firmware restart, and with RESUME_ALL the iterator will find
 323          * the vif being added already.
 324          * We don't want to reassign any IDs in either case since doing
 325          * so would probably assign different IDs (as interfaces aren't
 326          * necessarily added in the same order), but the old IDs were
 327          * preserved anyway, so skip ID assignment for both resume and
 328          * recovery.
 329          */
 330         if (data.found_vif)
 331                 return 0;
 332
 333         /* Therefore, in recovery, we can't get here */
 334         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 335                 return -EBUSY;
 336
 337         mvmvif->id = find_first_bit(data.available_mac_ids,
 338                                     NUM_MAC_INDEX_DRIVER);
 339         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 340                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 341                 ret = -EIO;
 342                 goto exit_fail;
 343         }
 344
 345         if (data.preferred_tsf != NUM_TSF_IDS)
 346                 mvmvif->tsf_id = data.preferred_tsf;
 347         else
 348                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 349                                                 NUM_TSF_IDS);
 350         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 351                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 352                 ret = -EIO;
 353                 goto exit_fail;
 354         }
 355
 356         mvmvif->color = 0;
 357
 358         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 359         mvmvif->time_event_data.id = TE_MAX;
 360
 361         /* No need to allocate data queues to P2P Device MAC.*/
 362         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 363                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 364                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 365
 366                 return 0;
 367         }
 368
 369         used_hw_queues = data.used_hw_queues;
 370
 371         /* Find available queues, and allocate them to the ACs */
 372         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 373                 u8 queue = find_first_zero_bit(&used_hw_queues,
 374                                                mvm->first_agg_queue);
 375
 376                 if (queue >= mvm->first_agg_queue) {
 377                         IWL_ERR(mvm, "Failed to allocate queue\n");
 378                         ret = -EIO;
 379                         goto exit_fail;
 380                 }
 381
 382                 __set_bit(queue, &used_hw_queues);
 383                 vif->hw_queue[ac] = queue;
 384         }
 385
 386         /* Allocate the CAB queue for softAP and GO interfaces */
 387         if (vif->type == NL80211_IFTYPE_AP) {
 388                 u8 queue = find_first_zero_bit(&used_hw_queues,
 389                                                mvm->first_agg_queue);
 390
 391                 if (queue >= mvm->first_agg_queue) {
 392                         IWL_ERR(mvm, "Failed to allocate cab queue\n");
 393                         ret = -EIO;
 394                         goto exit_fail;
 395                 }
 396
 397                 vif->cab_queue = queue;
 398         } else {
 399                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 400         }
 401
 402         mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT;
 403         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 404
 405         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 406                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 407
 408         return 0;
 409
 410 exit_fail:
 411         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 412         memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 413         vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 414         return ret;
 415 }
 416
 417 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 418 {
 419         u32 ac;
 420         int ret;
 421
 422         lockdep_assert_held(&mvm->mutex);
 423
 424         ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif);
 425         if (ret)
 426                 return ret;
 427
 428         switch (vif->type) {
 429         case NL80211_IFTYPE_P2P_DEVICE:
 430                 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 431                                       IWL_MVM_TX_FIFO_VO);
 432                 break;
 433         case NL80211_IFTYPE_AP:
 434                 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue,
 435                                       IWL_MVM_TX_FIFO_MCAST);
 436                 /* fall through */
 437         default:
 438                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 439                         iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac],
 440                                               iwl_mvm_ac_to_tx_fifo[ac]);
 441                 break;
 442         }
 443
 444         return 0;
 445 }
 446
 447 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 448 {
 449         int ac;
 450
 451         lockdep_assert_held(&mvm->mutex);
 452
 453         switch (vif->type) {
 454         case NL80211_IFTYPE_P2P_DEVICE:
 455                 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE);
 456                 break;
 457         case NL80211_IFTYPE_AP:
 458                 iwl_mvm_disable_txq(mvm, vif->cab_queue);
 459                 /* fall through */
 460         default:
 461                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 462                         iwl_mvm_disable_txq(mvm, vif->hw_queue[ac]);
 463         }
 464 }
 465
 466 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 467                               struct ieee80211_vif *vif,
 468                               enum ieee80211_band band,
 469                               u8 *cck_rates, u8 *ofdm_rates)
 470 {
 471         struct ieee80211_supported_band *sband;
 472         unsigned long basic = vif->bss_conf.basic_rates;
 473         int lowest_present_ofdm = 100;
 474         int lowest_present_cck = 100;
 475         u8 cck = 0;
 476         u8 ofdm = 0;
 477         int i;
 478
 479         sband = mvm->hw->wiphy->bands[band];
 480
 481         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 482                 int hw = sband->bitrates[i].hw_value;
 483                 if (hw >= IWL_FIRST_OFDM_RATE) {
 484                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 485                         if (lowest_present_ofdm > hw)
 486                                 lowest_present_ofdm = hw;
 487                 } else {
 488                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 489
 490                         cck |= BIT(hw);
 491                         if (lowest_present_cck > hw)
 492                                 lowest_present_cck = hw;
 493                 }
 494         }
 495
 496         /*
 497          * Now we've got the basic rates as bitmaps in the ofdm and cck
 498          * variables. This isn't sufficient though, as there might not
 499          * be all the right rates in the bitmap. E.g. if the only basic
 500          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 501          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 502          *
 503          *    [...] a STA responding to a received frame shall transmit
 504          *    its Control Response frame [...] at the highest rate in the
 505          *    BSSBasicRateSet parameter that is less than or equal to the
 506          *    rate of the immediately previous frame in the frame exchange
 507          *    sequence ([...]) and that is of the same modulation class
 508          *    ([...]) as the received frame. If no rate contained in the
 509          *    BSSBasicRateSet parameter meets these conditions, then the
 510          *    control frame sent in response to a received frame shall be
 511          *    transmitted at the highest mandatory rate of the PHY that is
 512          *    less than or equal to the rate of the received frame, and
 513          *    that is of the same modulation class as the received frame.
 514          *
 515          * As a consequence, we need to add all mandatory rates that are
 516          * lower than all of the basic rates to these bitmaps.
 517          */
 518
 519         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 520                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 521         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 522                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 523         /* 6M already there or needed so always add */
 524         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 525
 526         /*
 527          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 528          * Note, however:
 529          *  - if no CCK rates are basic, it must be ERP since there must
 530          *    be some basic rates at all, so they're OFDM => ERP PHY
 531          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 532          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 533          *  - if 5.5M is basic, 1M and 2M are mandatory
 534          *  - if 2M is basic, 1M is mandatory
 535          *  - if 1M is basic, that's the only valid ACK rate.
 536          * As a consequence, it's not as complicated as it sounds, just add
 537          * any lower rates to the ACK rate bitmap.
 538          */
 539         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 540                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 541         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 542                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 543         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 544                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 545         /* 1M already there or needed so always add */
 546         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 547
 548         *cck_rates = cck;
 549         *ofdm_rates = ofdm;
 550 }
 551
 552 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 553                                          struct ieee80211_vif *vif,
 554                                          struct iwl_mac_ctx_cmd *cmd)
 555 {
 556         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 557         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 558                                  IEEE80211_HT_OP_MODE_PROTECTION;
 559         /* The fw does not distinguish between ht and fat */
 560         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 561
 562         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 563         /*
 564          * See section 9.23.3.1 of IEEE 80211-2012.
 565          * Nongreenfield HT STAs Present is not supported.
 566          */
 567         switch (protection_mode) {
 568         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 569                 break;
 570         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 571         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 572                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 573                 break;
 574         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 575                 /* Protect when channel wider than 20MHz */
 576                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 577                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 578                 break;
 579         default:
 580                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 581                         protection_mode);
 582                 break;
 583         }
 584 }
 585
 586 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 587                                         struct ieee80211_vif *vif,
 588                                         struct iwl_mac_ctx_cmd *cmd,
 589                                         const u8 *bssid_override,
 590                                         u32 action)
 591 {
 592         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 593         struct ieee80211_chanctx_conf *chanctx;
 594         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 595                              IEEE80211_HT_OP_MODE_PROTECTION);
 596         u8 cck_ack_rates, ofdm_ack_rates;
 597         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 598         int i;
 599
 600         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 601                                                             mvmvif->color));
 602         cmd->action = cpu_to_le32(action);
 603
 604         switch (vif->type) {
 605         case NL80211_IFTYPE_STATION:
 606                 if (vif->p2p)
 607                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 608                 else
 609                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 610                 break;
 611         case NL80211_IFTYPE_AP:
 612                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 613                 break;
 614         case NL80211_IFTYPE_MONITOR:
 615                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 616                 break;
 617         case NL80211_IFTYPE_P2P_DEVICE:
 618                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 619                 break;
 620         case NL80211_IFTYPE_ADHOC:
 621                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 622                 break;
 623         default:
 624                 WARN_ON_ONCE(1);
 625         }
 626
 627         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 628
 629         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 630
 631         if (bssid)
 632                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 633         else
 634                 eth_broadcast_addr(cmd->bssid_addr);
 635
 636         rcu_read_lock();
 637         chanctx = rcu_dereference(vif->chanctx_conf);
 638         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 639                                             : IEEE80211_BAND_2GHZ,
 640                           &cck_ack_rates, &ofdm_ack_rates);
 641         rcu_read_unlock();
 642
 643         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 644         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 645
 646         cmd->cck_short_preamble =
 647                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 648                             MAC_FLG_SHORT_PREAMBLE : 0);
 649         cmd->short_slot =
 650                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 651                             MAC_FLG_SHORT_SLOT : 0);
 652
 653         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 654                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 655
 656                 cmd->ac[txf].cw_min =
 657                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 658                 cmd->ac[txf].cw_max =
 659                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 660                 cmd->ac[txf].edca_txop =
 661                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 662                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 663                 cmd->ac[txf].fifos_mask = BIT(txf);
 664         }
 665
 666         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 667         if (vif->type == NL80211_IFTYPE_AP)
 668                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 669                         BIT(IWL_MVM_TX_FIFO_MCAST);
 670
 671         if (vif->bss_conf.qos)
 672                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 673
 674         if (vif->bss_conf.use_cts_prot)
 675                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 676
 677         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 678                        vif->bss_conf.use_cts_prot,
 679                        vif->bss_conf.ht_operation_mode);
 680         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 681                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 682         if (ht_enabled)
 683                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 684
 685         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 686 }
 687
 688 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 689                                      struct iwl_mac_ctx_cmd *cmd)
 690 {
 691         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 692                                        sizeof(*cmd), cmd);
 693         if (ret)
 694                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 695                         le32_to_cpu(cmd->action), ret);
 696         return ret;
 697 }
 698
 699 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 700                                     struct ieee80211_vif *vif,
 701                                     u32 action, bool force_assoc_off,
 702                                     const u8 *bssid_override)
 703 {
 704         struct iwl_mac_ctx_cmd cmd = {};
 705         struct iwl_mac_data_sta *ctxt_sta;
 706
 707         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 708
 709         /* Fill the common data for all mac context types */
 710         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 711
 712         if (vif->p2p) {
 713                 struct ieee80211_p2p_noa_attr *noa =
 714                         &vif->bss_conf.p2p_noa_attr;
 715
 716                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 717                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 718                 ctxt_sta = &cmd.p2p_sta.sta;
 719         } else {
 720                 ctxt_sta = &cmd.sta;
 721         }
 722
 723         /* We need the dtim_period to set the MAC as associated */
 724         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 725             !force_assoc_off) {
 726                 u32 dtim_offs;
 727
 728                 /*
 729                  * The DTIM count counts down, so when it is N that means N
 730                  * more beacon intervals happen until the DTIM TBTT. Therefore
 731                  * add this to the current time. If that ends up being in the
 732                  * future, the firmware will handle it.
 733                  *
 734                  * Also note that the system_timestamp (which we get here as
 735                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 736                  * same offset in the frame -- the TSF is at the first symbol
 737                  * of the TSF, the system timestamp is at signal acquisition
 738                  * time. This means there's an offset between them of at most
 739                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 740                  * 384us in the longest case), this is currently not relevant
 741                  * as the firmware wakes up around 2ms before the TBTT.
 742                  */
 743                 dtim_offs = vif->bss_conf.sync_dtim_count *
 744                                 vif->bss_conf.beacon_int;
 745                 /* convert TU to usecs */
 746                 dtim_offs *= 1024;
 747
 748                 ctxt_sta->dtim_tsf =
 749                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 750                 ctxt_sta->dtim_time =
 751                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 752
 753                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 754                                le64_to_cpu(ctxt_sta->dtim_tsf),
 755                                le32_to_cpu(ctxt_sta->dtim_time),
 756                                dtim_offs);
 757
 758                 ctxt_sta->is_assoc = cpu_to_le32(1);
 759         } else {
 760                 ctxt_sta->is_assoc = cpu_to_le32(0);
 761
 762                 /* Allow beacons to pass through as long as we are not
 763                  * associated, or we do not have dtim period information.
 764                  */
 765                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 766         }
 767
 768         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 769         ctxt_sta->bi_reciprocal =
 770                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 771         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 772                                               vif->bss_conf.dtim_period);
 773         ctxt_sta->dtim_reciprocal =
 774                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 775                                                vif->bss_conf.dtim_period));
 776
 777         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 778         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 779
 780         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 781 }
 782
 783 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 784                                          struct ieee80211_vif *vif,
 785                                          u32 action)
 786 {
 787         struct iwl_mac_ctx_cmd cmd = {};
 788
 789         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 790
 791         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 792
 793         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 794                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 795                                        MAC_FILTER_IN_BEACON |
 796                                        MAC_FILTER_IN_PROBE_REQUEST |
 797                                        MAC_FILTER_IN_CRC32);
 798         mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
 799
 800         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 801 }
 802
 803 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 804                                      struct ieee80211_vif *vif,
 805                                      u32 action)
 806 {
 807         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 808         struct iwl_mac_ctx_cmd cmd = {};
 809
 810         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 811
 812         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 813
 814         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 815                                        MAC_FILTER_IN_PROBE_REQUEST);
 816
 817         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 818         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 819         cmd.ibss.bi_reciprocal =
 820                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 821
 822         /* TODO: Assumes that the beacon id == mac context id */
 823         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 824
 825         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 826 }
 827
 828 struct iwl_mvm_go_iterator_data {
 829         bool go_active;
 830 };
 831
 832 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 833 {
 834         struct iwl_mvm_go_iterator_data *data = _data;
 835         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 836
 837         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 838             mvmvif->ap_ibss_active)
 839                 data->go_active = true;
 840 }
 841
 842 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 843                                            struct ieee80211_vif *vif,
 844                                            u32 action)
 845 {
 846         struct iwl_mac_ctx_cmd cmd = {};
 847         struct iwl_mvm_go_iterator_data data = {};
 848
 849         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 850
 851         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 852
 853         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 854
 855         /* Override the filter flags to accept only probe requests */
 856         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 857
 858         /*
 859          * This flag should be set to true when the P2P Device is
 860          * discoverable and there is at least another active P2P GO. Settings
 861          * this flag will allow the P2P Device to be discoverable on other
 862          * channels in addition to its listen channel.
 863          * Note that this flag should not be set in other cases as it opens the
 864          * Rx filters on all MAC and increases the number of interrupts.
 865          */
 866         ieee80211_iterate_active_interfaces_atomic(
 867                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 868                 iwl_mvm_go_iterator, &data);
 869
 870         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 871         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 872 }
 873
 874 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 875                                      struct iwl_mac_beacon_cmd *beacon_cmd,
 876                                      u8 *beacon, u32 frame_size)
 877 {
 878         u32 tim_idx;
 879         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 880
 881         /* The index is relative to frame start but we start looking at the
 882          * variable-length part of the beacon. */
 883         tim_idx = mgmt->u.beacon.variable - beacon;
 884
 885         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 886         while ((tim_idx < (frame_size - 2)) &&
 887                         (beacon[tim_idx] != WLAN_EID_TIM))
 888                 tim_idx += beacon[tim_idx+1] + 2;
 889
 890         /* If TIM field was found, set variables */
 891         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 892                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
 893                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
 894         } else {
 895                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 896         }
 897 }
 898
 899 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
 900                                         struct ieee80211_vif *vif,
 901                                         struct sk_buff *beacon)
 902 {
 903         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 904         struct iwl_host_cmd cmd = {
 905                 .id = BEACON_TEMPLATE_CMD,
 906                 .flags = CMD_ASYNC,
 907         };
 908         struct iwl_mac_beacon_cmd beacon_cmd = {};
 909         struct ieee80211_tx_info *info;
 910         u32 beacon_skb_len;
 911         u32 rate, tx_flags;
 912
 913         if (WARN_ON(!beacon))
 914                 return -EINVAL;
 915
 916         beacon_skb_len = beacon->len;
 917
 918         /* TODO: for now the beacon template id is set to be the mac context id.
 919          * Might be better to handle it as another resource ... */
 920         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 921         info = IEEE80211_SKB_CB(beacon);
 922
 923         /* Set up TX command fields */
 924         beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
 925         beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
 926         beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 927         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
 928         tx_flags |=
 929                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
 930                                                 TX_CMD_FLG_BT_PRIO_POS;
 931         beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags);
 932
 933         mvm->mgmt_last_antenna_idx =
 934                 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
 935                                      mvm->mgmt_last_antenna_idx);
 936
 937         beacon_cmd.tx.rate_n_flags =
 938                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 939                             RATE_MCS_ANT_POS);
 940
 941         if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) {
 942                 rate = IWL_FIRST_OFDM_RATE;
 943         } else {
 944                 rate = IWL_FIRST_CCK_RATE;
 945                 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 946         }
 947         beacon_cmd.tx.rate_n_flags |=
 948                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 949
 950         /* Set up TX beacon command fields */
 951         if (vif->type == NL80211_IFTYPE_AP)
 952                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
 953                                          beacon->data,
 954                                          beacon_skb_len);
 955
 956         /* Submit command */
 957         cmd.len[0] = sizeof(beacon_cmd);
 958         cmd.data[0] = &beacon_cmd;
 959         cmd.dataflags[0] = 0;
 960         cmd.len[1] = beacon_skb_len;
 961         cmd.data[1] = beacon->data;
 962         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
 963
 964         return iwl_mvm_send_cmd(mvm, &cmd);
 965 }
 966
 967 /* The beacon template for the AP/GO/IBSS has changed and needs update */
 968 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
 969                                     struct ieee80211_vif *vif)
 970 {
 971         struct sk_buff *beacon;
 972         int ret;
 973
 974         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
 975                 vif->type != NL80211_IFTYPE_ADHOC);
 976
 977         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
 978         if (!beacon)
 979                 return -ENOMEM;
 980
 981         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
 982         dev_kfree_skb(beacon);
 983         return ret;
 984 }
 985
 986 struct iwl_mvm_mac_ap_iterator_data {
 987         struct iwl_mvm *mvm;
 988         struct ieee80211_vif *vif;
 989         u32 beacon_device_ts;
 990         u16 beacon_int;
 991 };
 992
 993 /* Find the beacon_device_ts and beacon_int for a managed interface */
 994 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
 995                                     struct ieee80211_vif *vif)
 996 {
 997         struct iwl_mvm_mac_ap_iterator_data *data = _data;
 998
 999         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1000                 return;
1001
1002         /* Station client has higher priority over P2P client*/
1003         if (vif->p2p && data->beacon_device_ts)
1004                 return;
1005
1006         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1007         data->beacon_int = vif->bss_conf.beacon_int;
1008 }
1009
1010 /*
1011  * Fill the specific data for mac context of type AP of P2P GO
1012  */
1013 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1014                                          struct ieee80211_vif *vif,
1015                                          struct iwl_mac_data_ap *ctxt_ap,
1016                                          bool add)
1017 {
1018         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1019         struct iwl_mvm_mac_ap_iterator_data data = {
1020                 .mvm = mvm,
1021                 .vif = vif,
1022                 .beacon_device_ts = 0
1023         };
1024
1025         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1026         ctxt_ap->bi_reciprocal =
1027                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1028         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1029                                              vif->bss_conf.dtim_period);
1030         ctxt_ap->dtim_reciprocal =
1031                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1032                                                vif->bss_conf.dtim_period));
1033
1034         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1035
1036         /*
1037          * Only set the beacon time when the MAC is being added, when we
1038          * just modify the MAC then we should keep the time -- the firmware
1039          * can otherwise have a "jumping" TBTT.
1040          */
1041         if (add) {
1042                 /*
1043                  * If there is a station/P2P client interface which is
1044                  * associated, set the AP's TBTT far enough from the station's
1045                  * TBTT. Otherwise, set it to the current system time
1046                  */
1047                 ieee80211_iterate_active_interfaces_atomic(
1048                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1049                         iwl_mvm_mac_ap_iterator, &data);
1050
1051                 if (data.beacon_device_ts) {
1052                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1053                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1054                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1055                                                      100);
1056                 } else {
1057                         mvmvif->ap_beacon_time =
1058                                 iwl_read_prph(mvm->trans,
1059                                               DEVICE_SYSTEM_TIME_REG);
1060                 }
1061         }
1062
1063         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1064         ctxt_ap->beacon_tsf = 0; /* unused */
1065
1066         /* TODO: Assume that the beacon id == mac context id */
1067         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1068 }
1069
1070 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1071                                    struct ieee80211_vif *vif,
1072                                    u32 action)
1073 {
1074         struct iwl_mac_ctx_cmd cmd = {};
1075
1076         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1077
1078         /* Fill the common data for all mac context types */
1079         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1080
1081         /*
1082          * pass probe requests and beacons from other APs (needed
1083          * for ht protection)
1084          */
1085         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1086                                         MAC_FILTER_IN_BEACON);
1087
1088         /* Fill the data specific for ap mode */
1089         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1090                                      action == FW_CTXT_ACTION_ADD);
1091
1092         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1093 }
1094
1095 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1096                                    struct ieee80211_vif *vif,
1097                                    u32 action)
1098 {
1099         struct iwl_mac_ctx_cmd cmd = {};
1100         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1101
1102         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1103
1104         /* Fill the common data for all mac context types */
1105         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1106
1107         /*
1108          * pass probe requests and beacons from other APs (needed
1109          * for ht protection)
1110          */
1111         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1112                                         MAC_FILTER_IN_BEACON);
1113
1114         /* Fill the data specific for GO mode */
1115         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1116                                      action == FW_CTXT_ACTION_ADD);
1117
1118         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1119                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1120         cmd.go.opp_ps_enabled =
1121                         cpu_to_le32(!!(noa->oppps_ctwindow &
1122                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1123
1124         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1125 }
1126
1127 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1128                                 u32 action, bool force_assoc_off,
1129                                 const u8 *bssid_override)
1130 {
1131         switch (vif->type) {
1132         case NL80211_IFTYPE_STATION:
1133                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1134                                                 force_assoc_off,
1135                                                 bssid_override);
1136                 break;
1137         case NL80211_IFTYPE_AP:
1138                 if (!vif->p2p)
1139                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1140                 else
1141                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1142                 break;
1143         case NL80211_IFTYPE_MONITOR:
1144                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1145         case NL80211_IFTYPE_P2P_DEVICE:
1146                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1147         case NL80211_IFTYPE_ADHOC:
1148                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1149         default:
1150                 break;
1151         }
1152
1153         return -EOPNOTSUPP;
1154 }
1155
1156 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1157 {
1158         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1159         int ret;
1160
1161         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1162                       vif->addr, ieee80211_vif_type_p2p(vif)))
1163                 return -EIO;
1164
1165         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1166                                    true, NULL);
1167         if (ret)
1168                 return ret;
1169
1170         /* will only do anything at resume from D3 time */
1171         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1172
1173         mvmvif->uploaded = true;
1174         return 0;
1175 }
1176
1177 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1178                              bool force_assoc_off, const u8 *bssid_override)
1179 {
1180         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1181
1182         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1183                       vif->addr, ieee80211_vif_type_p2p(vif)))
1184                 return -EIO;
1185
1186         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1187                                     force_assoc_off, bssid_override);
1188 }
1189
1190 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1191 {
1192         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1193         struct iwl_mac_ctx_cmd cmd;
1194         int ret;
1195
1196         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1197                       vif->addr, ieee80211_vif_type_p2p(vif)))
1198                 return -EIO;
1199
1200         memset(&cmd, 0, sizeof(cmd));
1201
1202         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1203                                                            mvmvif->color));
1204         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1205
1206         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1207                                    sizeof(cmd), &cmd);
1208         if (ret) {
1209                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1210                 return ret;
1211         }
1212
1213         mvmvif->uploaded = false;
1214
1215         if (vif->type == NL80211_IFTYPE_MONITOR)
1216                 mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1217
1218         return 0;
1219 }
1220
1221 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1222                                    struct ieee80211_vif *csa_vif, u32 gp2)
1223 {
1224         struct iwl_mvm_vif *mvmvif =
1225                         iwl_mvm_vif_from_mac80211(csa_vif);
1226
1227         if (!ieee80211_csa_is_complete(csa_vif)) {
1228                 int c = ieee80211_csa_update_counter(csa_vif);
1229
1230                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1231                 if (csa_vif->p2p &&
1232                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2) {
1233                         u32 rel_time = (c + 1) *
1234                                        csa_vif->bss_conf.beacon_int -
1235                                        IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1236                         u32 apply_time = gp2 + rel_time * 1024;
1237
1238                         iwl_mvm_schedule_csa_period(mvm, csa_vif,
1239                                          IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1240                                          IWL_MVM_CHANNEL_SWITCH_MARGIN,
1241                                          apply_time);
1242                 }
1243         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1244                 /* we don't have CSA NoA scheduled yet, switch now */
1245                 ieee80211_csa_finish(csa_vif);
1246                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1247         }
1248 }
1249
1250 int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1251                             struct iwl_rx_cmd_buffer *rxb,
1252                             struct iwl_device_cmd *cmd)
1253 {
1254         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1255         struct iwl_mvm_tx_resp *beacon_notify_hdr;
1256         struct ieee80211_vif *csa_vif;
1257         struct ieee80211_vif *tx_blocked_vif;
1258         u64 tsf;
1259
1260         lockdep_assert_held(&mvm->mutex);
1261
1262         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_CAPA_EXTENDED_BEACON) {
1263                 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1264
1265                 beacon_notify_hdr = &beacon->beacon_notify_hdr;
1266                 tsf = le64_to_cpu(beacon->tsf);
1267                 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1268         } else {
1269                 struct iwl_beacon_notif *beacon = (void *)pkt->data;
1270
1271                 beacon_notify_hdr = &beacon->beacon_notify_hdr;
1272                 tsf = le64_to_cpu(beacon->tsf);
1273         }
1274
1275         IWL_DEBUG_RX(mvm,
1276                      "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1277                      le16_to_cpu(beacon_notify_hdr->status.status) &
1278                                                                 TX_STATUS_MSK,
1279                      beacon_notify_hdr->failure_frame, tsf,
1280                      mvm->ap_last_beacon_gp2,
1281                      le32_to_cpu(beacon_notify_hdr->initial_rate));
1282
1283         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1284                                             lockdep_is_held(&mvm->mutex));
1285         if (unlikely(csa_vif && csa_vif->csa_active))
1286                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2);
1287
1288         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1289                                                 lockdep_is_held(&mvm->mutex));
1290         if (unlikely(tx_blocked_vif)) {
1291                 struct iwl_mvm_vif *mvmvif =
1292                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1293
1294                 /*
1295                  * The channel switch is started and we have blocked the
1296                  * stations. If this is the first beacon (the timeout wasn't
1297                  * set), set the unblock timeout, otherwise countdown
1298                  */
1299                 if (!mvm->csa_tx_block_bcn_timeout)
1300                         mvm->csa_tx_block_bcn_timeout =
1301                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1302                 else
1303                         mvm->csa_tx_block_bcn_timeout--;
1304
1305                 /* Check if the timeout is expired, and unblock tx */
1306                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1307                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1308                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1309                 }
1310         }
1311
1312         return 0;
1313 }
1314
1315 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1316                                          struct ieee80211_vif *vif)
1317 {
1318         struct iwl_missed_beacons_notif *missed_beacons = _data;
1319         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1320
1321         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1322                 return;
1323
1324         /*
1325          * TODO: the threshold should be adjusted based on latency conditions,
1326          * and/or in case of a CS flow on one of the other AP vifs.
1327          */
1328         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1329              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1330                 ieee80211_beacon_loss(vif);
1331 }
1332
1333 int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1334                                     struct iwl_rx_cmd_buffer *rxb,
1335                                     struct iwl_device_cmd *cmd)
1336 {
1337         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1338         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1339
1340         IWL_DEBUG_INFO(mvm,
1341                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1342                        le32_to_cpu(mb->mac_id),
1343                        le32_to_cpu(mb->consec_missed_beacons),
1344                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1345                        le32_to_cpu(mb->num_recvd_beacons),
1346                        le32_to_cpu(mb->num_expected_beacons));
1347
1348         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1349                                                    IEEE80211_IFACE_ITER_NORMAL,
1350                                                    iwl_mvm_beacon_loss_iterator,
1351                                                    mb);
1352         return 0;
1353 }