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
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  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  *
  38  * Redistribution and use in source and binary forms, with or without
  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.
  48  *  * Neither the name Intel Corporation nor the names of its
  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 ieee80211_vif *vif)
 201 {
 202         u32 qmask = 0, ac;
 203
 204         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 205                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 206
 207         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 208                 qmask |= BIT(vif->hw_queue[ac]);
 209
 210         if (vif->type == NL80211_IFTYPE_AP)
 211                 qmask |= BIT(vif->cab_queue);
 212
 213         return qmask;
 214 }
 215
 216 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 217                                        struct ieee80211_vif *vif)
 218 {
 219         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 220         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 221
 222         /* Iterator may already find the interface being added -- skip it */
 223         if (vif == data->vif) {
 224                 data->found_vif = true;
 225                 return;
 226         }
 227
 228         /* Mark the queues used by the vif */
 229         data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif);
 230
 231         /* Mark MAC IDs as used by clearing the available bit, and
 232          * (below) mark TSFs as used if their existing use is not
 233          * compatible with the new interface type.
 234          * No locking or atomic bit operations are needed since the
 235          * data is on the stack of the caller function.
 236          */
 237         __clear_bit(mvmvif->id, data->available_mac_ids);
 238
 239         /* find a suitable tsf_id */
 240         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 241 }
 242
 243 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 244                                     struct ieee80211_vif *vif)
 245 {
 246         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 247         struct iwl_mvm_mac_iface_iterator_data data = {
 248                 .mvm = mvm,
 249                 .vif = vif,
 250                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 251                 /* no preference yet */
 252                 .preferred_tsf = NUM_TSF_IDS,
 253         };
 254
 255         ieee80211_iterate_active_interfaces_atomic(
 256                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 257                 iwl_mvm_mac_tsf_id_iter, &data);
 258
 259         if (data.preferred_tsf != NUM_TSF_IDS)
 260                 mvmvif->tsf_id = data.preferred_tsf;
 261         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 262                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 263                                                 NUM_TSF_IDS);
 264 }
 265
 266 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
 267                                                struct ieee80211_vif *vif)
 268 {
 269         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 270         struct iwl_mvm_mac_iface_iterator_data data = {
 271                 .mvm = mvm,
 272                 .vif = vif,
 273                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 274                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 275                 /* no preference yet */
 276                 .preferred_tsf = NUM_TSF_IDS,
 277                 .used_hw_queues =
 278                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 279                         BIT(mvm->aux_queue) |
 280                         BIT(IWL_MVM_CMD_QUEUE),
 281                 .found_vif = false,
 282         };
 283         u32 ac;
 284         int ret, i;
 285         unsigned long used_hw_queues;
 286
 287         /*
 288          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 289          * and other resources.
 290          */
 291
 292         /*
 293          * Before the iterator, we start with all MAC IDs and TSFs available.
 294          *
 295          * During iteration, all MAC IDs are cleared that are in use by other
 296          * virtual interfaces, and all TSF IDs are cleared that can't be used
 297          * by this new virtual interface because they're used by an interface
 298          * that can't share it with the new one.
 299          * At the same time, we check if there's a preferred TSF in the case
 300          * that we should share it with another interface.
 301          */
 302
 303         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 304         switch (vif->type) {
 305         case NL80211_IFTYPE_ADHOC:
 306                 break;
 307         case NL80211_IFTYPE_STATION:
 308                 if (!vif->p2p)
 309                         break;
 310                 /* fall through */
 311         default:
 312                 __clear_bit(0, data.available_mac_ids);
 313         }
 314
 315         ieee80211_iterate_active_interfaces_atomic(
 316                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 317                 iwl_mvm_mac_iface_iterator, &data);
 318
 319         /*
 320          * In the case we're getting here during resume, it's similar to
 321          * firmware restart, and with RESUME_ALL the iterator will find
 322          * the vif being added already.
 323          * We don't want to reassign any IDs in either case since doing
 324          * so would probably assign different IDs (as interfaces aren't
 325          * necessarily added in the same order), but the old IDs were
 326          * preserved anyway, so skip ID assignment for both resume and
 327          * recovery.
 328          */
 329         if (data.found_vif)
 330                 return 0;
 331
 332         /* Therefore, in recovery, we can't get here */
 333         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 334                 return -EBUSY;
 335
 336         mvmvif->id = find_first_bit(data.available_mac_ids,
 337                                     NUM_MAC_INDEX_DRIVER);
 338         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 339                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 340                 ret = -EIO;
 341                 goto exit_fail;
 342         }
 343
 344         if (data.preferred_tsf != NUM_TSF_IDS)
 345                 mvmvif->tsf_id = data.preferred_tsf;
 346         else
 347                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 348                                                 NUM_TSF_IDS);
 349         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 350                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 351                 ret = -EIO;
 352                 goto exit_fail;
 353         }
 354
 355         mvmvif->color = 0;
 356
 357         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 358         mvmvif->time_event_data.id = TE_MAX;
 359
 360         /* No need to allocate data queues to P2P Device MAC.*/
 361         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 362                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 363                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 364
 365                 return 0;
 366         }
 367
 368         used_hw_queues = data.used_hw_queues;
 369
 370         /* Find available queues, and allocate them to the ACs */
 371         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 372                 u8 queue = find_first_zero_bit(&used_hw_queues,
 373                                                mvm->first_agg_queue);
 374
 375                 if (queue >= mvm->first_agg_queue) {
 376                         IWL_ERR(mvm, "Failed to allocate queue\n");
 377                         ret = -EIO;
 378                         goto exit_fail;
 379                 }
 380
 381                 __set_bit(queue, &used_hw_queues);
 382                 vif->hw_queue[ac] = queue;
 383         }
 384
 385         /* Allocate the CAB queue for softAP and GO interfaces */
 386         if (vif->type == NL80211_IFTYPE_AP) {
 387                 u8 queue = find_first_zero_bit(&used_hw_queues,
 388                                                mvm->first_agg_queue);
 389
 390                 if (queue >= mvm->first_agg_queue) {
 391                         IWL_ERR(mvm, "Failed to allocate cab queue\n");
 392                         ret = -EIO;
 393                         goto exit_fail;
 394                 }
 395
 396                 vif->cab_queue = queue;
 397         } else {
 398                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 399         }
 400
 401         mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT;
 402         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 403
 404         for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 405                 mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 406
 407         return 0;
 408
 409 exit_fail:
 410         memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 411         memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 412         vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 413         return ret;
 414 }
 415
 416 int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 417 {
 418         u32 ac;
 419         int ret;
 420
 421         lockdep_assert_held(&mvm->mutex);
 422
 423         ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif);
 424         if (ret)
 425                 return ret;
 426
 427         switch (vif->type) {
 428         case NL80211_IFTYPE_P2P_DEVICE:
 429                 iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE,
 430                                       IWL_MVM_TX_FIFO_VO);
 431                 break;
 432         case NL80211_IFTYPE_AP:
 433                 iwl_mvm_enable_ac_txq(mvm, vif->cab_queue,
 434                                       IWL_MVM_TX_FIFO_MCAST);
 435                 /* fall through */
 436         default:
 437                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 438                         iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac],
 439                                               iwl_mvm_ac_to_tx_fifo[ac]);
 440                 break;
 441         }
 442
 443         return 0;
 444 }
 445
 446 void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 447 {
 448         int ac;
 449
 450         lockdep_assert_held(&mvm->mutex);
 451
 452         switch (vif->type) {
 453         case NL80211_IFTYPE_P2P_DEVICE:
 454                 iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE);
 455                 break;
 456         case NL80211_IFTYPE_AP:
 457                 iwl_mvm_disable_txq(mvm, vif->cab_queue);
 458                 /* fall through */
 459         default:
 460                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 461                         iwl_mvm_disable_txq(mvm, vif->hw_queue[ac]);
 462         }
 463 }
 464
 465 static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 466                               struct ieee80211_vif *vif,
 467                               enum ieee80211_band band,
 468                               u8 *cck_rates, u8 *ofdm_rates)
 469 {
 470         struct ieee80211_supported_band *sband;
 471         unsigned long basic = vif->bss_conf.basic_rates;
 472         int lowest_present_ofdm = 100;
 473         int lowest_present_cck = 100;
 474         u8 cck = 0;
 475         u8 ofdm = 0;
 476         int i;
 477
 478         sband = mvm->hw->wiphy->bands[band];
 479
 480         for_each_set_bit(i, &basic, BITS_PER_LONG) {
 481                 int hw = sband->bitrates[i].hw_value;
 482                 if (hw >= IWL_FIRST_OFDM_RATE) {
 483                         ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 484                         if (lowest_present_ofdm > hw)
 485                                 lowest_present_ofdm = hw;
 486                 } else {
 487                         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 488
 489                         cck |= BIT(hw);
 490                         if (lowest_present_cck > hw)
 491                                 lowest_present_cck = hw;
 492                 }
 493         }
 494
 495         /*
 496          * Now we've got the basic rates as bitmaps in the ofdm and cck
 497          * variables. This isn't sufficient though, as there might not
 498          * be all the right rates in the bitmap. E.g. if the only basic
 499          * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 500          * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 501          *
 502          *    [...] a STA responding to a received frame shall transmit
 503          *    its Control Response frame [...] at the highest rate in the
 504          *    BSSBasicRateSet parameter that is less than or equal to the
 505          *    rate of the immediately previous frame in the frame exchange
 506          *    sequence ([...]) and that is of the same modulation class
 507          *    ([...]) as the received frame. If no rate contained in the
 508          *    BSSBasicRateSet parameter meets these conditions, then the
 509          *    control frame sent in response to a received frame shall be
 510          *    transmitted at the highest mandatory rate of the PHY that is
 511          *    less than or equal to the rate of the received frame, and
 512          *    that is of the same modulation class as the received frame.
 513          *
 514          * As a consequence, we need to add all mandatory rates that are
 515          * lower than all of the basic rates to these bitmaps.
 516          */
 517
 518         if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 519                 ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 520         if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 521                 ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 522         /* 6M already there or needed so always add */
 523         ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 524
 525         /*
 526          * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 527          * Note, however:
 528          *  - if no CCK rates are basic, it must be ERP since there must
 529          *    be some basic rates at all, so they're OFDM => ERP PHY
 530          *    (or we're in 5 GHz, and the cck bitmap will never be used)
 531          *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 532          *  - if 5.5M is basic, 1M and 2M are mandatory
 533          *  - if 2M is basic, 1M is mandatory
 534          *  - if 1M is basic, that's the only valid ACK rate.
 535          * As a consequence, it's not as complicated as it sounds, just add
 536          * any lower rates to the ACK rate bitmap.
 537          */
 538         if (IWL_RATE_11M_INDEX < lowest_present_cck)
 539                 cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 540         if (IWL_RATE_5M_INDEX < lowest_present_cck)
 541                 cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 542         if (IWL_RATE_2M_INDEX < lowest_present_cck)
 543                 cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 544         /* 1M already there or needed so always add */
 545         cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 546
 547         *cck_rates = cck;
 548         *ofdm_rates = ofdm;
 549 }
 550
 551 static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 552                                          struct ieee80211_vif *vif,
 553                                          struct iwl_mac_ctx_cmd *cmd)
 554 {
 555         /* for both sta and ap, ht_operation_mode hold the protection_mode */
 556         u8 protection_mode = vif->bss_conf.ht_operation_mode &
 557                                  IEEE80211_HT_OP_MODE_PROTECTION;
 558         /* The fw does not distinguish between ht and fat */
 559         u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 560
 561         IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 562         /*
 563          * See section 9.23.3.1 of IEEE 80211-2012.
 564          * Nongreenfield HT STAs Present is not supported.
 565          */
 566         switch (protection_mode) {
 567         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 568                 break;
 569         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 570         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 571                 cmd->protection_flags |= cpu_to_le32(ht_flag);
 572                 break;
 573         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 574                 /* Protect when channel wider than 20MHz */
 575                 if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 576                         cmd->protection_flags |= cpu_to_le32(ht_flag);
 577                 break;
 578         default:
 579                 IWL_ERR(mvm, "Illegal protection mode %d\n",
 580                         protection_mode);
 581                 break;
 582         }
 583 }
 584
 585 static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 586                                         struct ieee80211_vif *vif,
 587                                         struct iwl_mac_ctx_cmd *cmd,
 588                                         const u8 *bssid_override,
 589                                         u32 action)
 590 {
 591         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 592         struct ieee80211_chanctx_conf *chanctx;
 593         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 594                              IEEE80211_HT_OP_MODE_PROTECTION);
 595         u8 cck_ack_rates, ofdm_ack_rates;
 596         const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 597         int i;
 598
 599         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 600                                                             mvmvif->color));
 601         cmd->action = cpu_to_le32(action);
 602
 603         switch (vif->type) {
 604         case NL80211_IFTYPE_STATION:
 605                 if (vif->p2p)
 606                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 607                 else
 608                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 609                 break;
 610         case NL80211_IFTYPE_AP:
 611                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 612                 break;
 613         case NL80211_IFTYPE_MONITOR:
 614                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 615                 break;
 616         case NL80211_IFTYPE_P2P_DEVICE:
 617                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 618                 break;
 619         case NL80211_IFTYPE_ADHOC:
 620                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 621                 break;
 622         default:
 623                 WARN_ON_ONCE(1);
 624         }
 625
 626         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 627
 628         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 629
 630         if (bssid)
 631                 memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 632         else
 633                 eth_broadcast_addr(cmd->bssid_addr);
 634
 635         rcu_read_lock();
 636         chanctx = rcu_dereference(vif->chanctx_conf);
 637         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 638                                             : IEEE80211_BAND_2GHZ,
 639                           &cck_ack_rates, &ofdm_ack_rates);
 640         rcu_read_unlock();
 641
 642         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 643         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 644
 645         cmd->cck_short_preamble =
 646                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 647                             MAC_FLG_SHORT_PREAMBLE : 0);
 648         cmd->short_slot =
 649                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 650                             MAC_FLG_SHORT_SLOT : 0);
 651
 652         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 653                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 654
 655                 cmd->ac[txf].cw_min =
 656                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 657                 cmd->ac[txf].cw_max =
 658                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 659                 cmd->ac[txf].edca_txop =
 660                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 661                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 662                 cmd->ac[txf].fifos_mask = BIT(txf);
 663         }
 664
 665         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 666         if (vif->type == NL80211_IFTYPE_AP)
 667                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 668                         BIT(IWL_MVM_TX_FIFO_MCAST);
 669
 670         if (vif->bss_conf.qos)
 671                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 672
 673         if (vif->bss_conf.use_cts_prot)
 674                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 675
 676         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 677                        vif->bss_conf.use_cts_prot,
 678                        vif->bss_conf.ht_operation_mode);
 679         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 680                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 681         if (ht_enabled)
 682                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 683
 684         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 685 }
 686
 687 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 688                                      struct iwl_mac_ctx_cmd *cmd)
 689 {
 690         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 691                                        sizeof(*cmd), cmd);
 692         if (ret)
 693                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 694                         le32_to_cpu(cmd->action), ret);
 695         return ret;
 696 }
 697
 698 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 699                                     struct ieee80211_vif *vif,
 700                                     u32 action, bool force_assoc_off,
 701                                     const u8 *bssid_override)
 702 {
 703         struct iwl_mac_ctx_cmd cmd = {};
 704         struct iwl_mac_data_sta *ctxt_sta;
 705
 706         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 707
 708         /* Fill the common data for all mac context types */
 709         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 710
 711         if (vif->p2p) {
 712                 struct ieee80211_p2p_noa_attr *noa =
 713                         &vif->bss_conf.p2p_noa_attr;
 714
 715                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 716                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 717                 ctxt_sta = &cmd.p2p_sta.sta;
 718         } else {
 719                 ctxt_sta = &cmd.sta;
 720         }
 721
 722         /* We need the dtim_period to set the MAC as associated */
 723         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 724             !force_assoc_off) {
 725                 u32 dtim_offs;
 726
 727                 /*
 728                  * The DTIM count counts down, so when it is N that means N
 729                  * more beacon intervals happen until the DTIM TBTT. Therefore
 730                  * add this to the current time. If that ends up being in the
 731                  * future, the firmware will handle it.
 732                  *
 733                  * Also note that the system_timestamp (which we get here as
 734                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 735                  * same offset in the frame -- the TSF is at the first symbol
 736                  * of the TSF, the system timestamp is at signal acquisition
 737                  * time. This means there's an offset between them of at most
 738                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 739                  * 384us in the longest case), this is currently not relevant
 740                  * as the firmware wakes up around 2ms before the TBTT.
 741                  */
 742                 dtim_offs = vif->bss_conf.sync_dtim_count *
 743                                 vif->bss_conf.beacon_int;
 744                 /* convert TU to usecs */
 745                 dtim_offs *= 1024;
 746
 747                 ctxt_sta->dtim_tsf =
 748                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 749                 ctxt_sta->dtim_time =
 750                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 751
 752                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 753                                le64_to_cpu(ctxt_sta->dtim_tsf),
 754                                le32_to_cpu(ctxt_sta->dtim_time),
 755                                dtim_offs);
 756
 757                 ctxt_sta->is_assoc = cpu_to_le32(1);
 758         } else {
 759                 ctxt_sta->is_assoc = cpu_to_le32(0);
 760
 761                 /* Allow beacons to pass through as long as we are not
 762                  * associated, or we do not have dtim period information.
 763                  */
 764                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 765         }
 766
 767         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 768         ctxt_sta->bi_reciprocal =
 769                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 770         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 771                                               vif->bss_conf.dtim_period);
 772         ctxt_sta->dtim_reciprocal =
 773                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 774                                                vif->bss_conf.dtim_period));
 775
 776         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 777         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 778
 779         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 780 }
 781
 782 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 783                                          struct ieee80211_vif *vif,
 784                                          u32 action)
 785 {
 786         struct iwl_mac_ctx_cmd cmd = {};
 787
 788         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 789
 790         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 791
 792         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 793                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 794                                        MAC_FILTER_IN_BEACON |
 795                                        MAC_FILTER_IN_PROBE_REQUEST |
 796                                        MAC_FILTER_IN_CRC32);
 797         mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
 798
 799         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 800 }
 801
 802 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 803                                      struct ieee80211_vif *vif,
 804                                      u32 action)
 805 {
 806         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 807         struct iwl_mac_ctx_cmd cmd = {};
 808
 809         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 810
 811         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 812
 813         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 814                                        MAC_FILTER_IN_PROBE_REQUEST);
 815
 816         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 817         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 818         cmd.ibss.bi_reciprocal =
 819                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 820
 821         /* TODO: Assumes that the beacon id == mac context id */
 822         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 823
 824         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 825 }
 826
 827 struct iwl_mvm_go_iterator_data {
 828         bool go_active;
 829 };
 830
 831 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 832 {
 833         struct iwl_mvm_go_iterator_data *data = _data;
 834         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 835
 836         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 837             mvmvif->ap_ibss_active)
 838                 data->go_active = true;
 839 }
 840
 841 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 842                                            struct ieee80211_vif *vif,
 843                                            u32 action)
 844 {
 845         struct iwl_mac_ctx_cmd cmd = {};
 846         struct iwl_mvm_go_iterator_data data = {};
 847
 848         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 849
 850         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 851
 852         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 853
 854         /* Override the filter flags to accept only probe requests */
 855         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 856
 857         /*
 858          * This flag should be set to true when the P2P Device is
 859          * discoverable and there is at least another active P2P GO. Settings
 860          * this flag will allow the P2P Device to be discoverable on other
 861          * channels in addition to its listen channel.
 862          * Note that this flag should not be set in other cases as it opens the
 863          * Rx filters on all MAC and increases the number of interrupts.
 864          */
 865         ieee80211_iterate_active_interfaces_atomic(
 866                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 867                 iwl_mvm_go_iterator, &data);
 868
 869         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 870         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 871 }
 872
 873 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 874                                      struct iwl_mac_beacon_cmd *beacon_cmd,
 875                                      u8 *beacon, u32 frame_size)
 876 {
 877         u32 tim_idx;
 878         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 879
 880         /* The index is relative to frame start but we start looking at the
 881          * variable-length part of the beacon. */
 882         tim_idx = mgmt->u.beacon.variable - beacon;
 883
 884         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 885         while ((tim_idx < (frame_size - 2)) &&
 886                         (beacon[tim_idx] != WLAN_EID_TIM))
 887                 tim_idx += beacon[tim_idx+1] + 2;
 888
 889         /* If TIM field was found, set variables */
 890         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 891                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
 892                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
 893         } else {
 894                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 895         }
 896 }
 897
 898 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
 899                                         struct ieee80211_vif *vif,
 900                                         struct sk_buff *beacon)
 901 {
 902         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 903         struct iwl_host_cmd cmd = {
 904                 .id = BEACON_TEMPLATE_CMD,
 905                 .flags = CMD_ASYNC,
 906         };
 907         struct iwl_mac_beacon_cmd beacon_cmd = {};
 908         struct ieee80211_tx_info *info;
 909         u32 beacon_skb_len;
 910         u32 rate, tx_flags;
 911
 912         if (WARN_ON(!beacon))
 913                 return -EINVAL;
 914
 915         beacon_skb_len = beacon->len;
 916
 917         /* TODO: for now the beacon template id is set to be the mac context id.
 918          * Might be better to handle it as another resource ... */
 919         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 920         info = IEEE80211_SKB_CB(beacon);
 921
 922         /* Set up TX command fields */
 923         beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
 924         beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
 925         beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 926         tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
 927         tx_flags |=
 928                 iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
 929                                                 TX_CMD_FLG_BT_PRIO_POS;
 930         beacon_cmd.tx.tx_flags = cpu_to_le32(tx_flags);
 931
 932         mvm->mgmt_last_antenna_idx =
 933                 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
 934                                      mvm->mgmt_last_antenna_idx);
 935
 936         beacon_cmd.tx.rate_n_flags =
 937                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 938                             RATE_MCS_ANT_POS);
 939
 940         if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) {
 941                 rate = IWL_FIRST_OFDM_RATE;
 942         } else {
 943                 rate = IWL_FIRST_CCK_RATE;
 944                 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 945         }
 946         beacon_cmd.tx.rate_n_flags |=
 947                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 948
 949         /* Set up TX beacon command fields */
 950         if (vif->type == NL80211_IFTYPE_AP)
 951                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
 952                                          beacon->data,
 953                                          beacon_skb_len);
 954
 955         /* Submit command */
 956         cmd.len[0] = sizeof(beacon_cmd);
 957         cmd.data[0] = &beacon_cmd;
 958         cmd.dataflags[0] = 0;
 959         cmd.len[1] = beacon_skb_len;
 960         cmd.data[1] = beacon->data;
 961         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
 962
 963         return iwl_mvm_send_cmd(mvm, &cmd);
 964 }
 965
 966 /* The beacon template for the AP/GO/IBSS has changed and needs update */
 967 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
 968                                     struct ieee80211_vif *vif)
 969 {
 970         struct sk_buff *beacon;
 971         int ret;
 972
 973         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
 974                 vif->type != NL80211_IFTYPE_ADHOC);
 975
 976         beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
 977         if (!beacon)
 978                 return -ENOMEM;
 979
 980         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
 981         dev_kfree_skb(beacon);
 982         return ret;
 983 }
 984
 985 struct iwl_mvm_mac_ap_iterator_data {
 986         struct iwl_mvm *mvm;
 987         struct ieee80211_vif *vif;
 988         u32 beacon_device_ts;
 989         u16 beacon_int;
 990 };
 991
 992 /* Find the beacon_device_ts and beacon_int for a managed interface */
 993 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
 994                                     struct ieee80211_vif *vif)
 995 {
 996         struct iwl_mvm_mac_ap_iterator_data *data = _data;
 997
 998         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
 999                 return;
1000
1001         /* Station client has higher priority over P2P client*/
1002         if (vif->p2p && data->beacon_device_ts)
1003                 return;
1004
1005         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1006         data->beacon_int = vif->bss_conf.beacon_int;
1007 }
1008
1009 /*
1010  * Fill the specific data for mac context of type AP of P2P GO
1011  */
1012 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1013                                          struct ieee80211_vif *vif,
1014                                          struct iwl_mac_data_ap *ctxt_ap,
1015                                          bool add)
1016 {
1017         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1018         struct iwl_mvm_mac_ap_iterator_data data = {
1019                 .mvm = mvm,
1020                 .vif = vif,
1021                 .beacon_device_ts = 0
1022         };
1023
1024         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1025         ctxt_ap->bi_reciprocal =
1026                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1027         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1028                                              vif->bss_conf.dtim_period);
1029         ctxt_ap->dtim_reciprocal =
1030                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1031                                                vif->bss_conf.dtim_period));
1032
1033         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1034
1035         /*
1036          * Only set the beacon time when the MAC is being added, when we
1037          * just modify the MAC then we should keep the time -- the firmware
1038          * can otherwise have a "jumping" TBTT.
1039          */
1040         if (add) {
1041                 /*
1042                  * If there is a station/P2P client interface which is
1043                  * associated, set the AP's TBTT far enough from the station's
1044                  * TBTT. Otherwise, set it to the current system time
1045                  */
1046                 ieee80211_iterate_active_interfaces_atomic(
1047                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1048                         iwl_mvm_mac_ap_iterator, &data);
1049
1050                 if (data.beacon_device_ts) {
1051                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1052                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1053                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1054                                                      100);
1055                 } else {
1056                         mvmvif->ap_beacon_time =
1057                                 iwl_read_prph(mvm->trans,
1058                                               DEVICE_SYSTEM_TIME_REG);
1059                 }
1060         }
1061
1062         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1063         ctxt_ap->beacon_tsf = 0; /* unused */
1064
1065         /* TODO: Assume that the beacon id == mac context id */
1066         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1067 }
1068
1069 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1070                                    struct ieee80211_vif *vif,
1071                                    u32 action)
1072 {
1073         struct iwl_mac_ctx_cmd cmd = {};
1074
1075         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1076
1077         /* Fill the common data for all mac context types */
1078         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1079
1080         /*
1081          * pass probe requests and beacons from other APs (needed
1082          * for ht protection)
1083          */
1084         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1085                                         MAC_FILTER_IN_BEACON);
1086
1087         /* Fill the data specific for ap mode */
1088         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1089                                      action == FW_CTXT_ACTION_ADD);
1090
1091         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1092 }
1093
1094 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1095                                    struct ieee80211_vif *vif,
1096                                    u32 action)
1097 {
1098         struct iwl_mac_ctx_cmd cmd = {};
1099         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1100
1101         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1102
1103         /* Fill the common data for all mac context types */
1104         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1105
1106         /*
1107          * pass probe requests and beacons from other APs (needed
1108          * for ht protection)
1109          */
1110         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST |
1111                                         MAC_FILTER_IN_BEACON);
1112
1113         /* Fill the data specific for GO mode */
1114         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1115                                      action == FW_CTXT_ACTION_ADD);
1116
1117         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1118                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1119         cmd.go.opp_ps_enabled =
1120                         cpu_to_le32(!!(noa->oppps_ctwindow &
1121                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1122
1123         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1124 }
1125
1126 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1127                                 u32 action, bool force_assoc_off,
1128                                 const u8 *bssid_override)
1129 {
1130         switch (vif->type) {
1131         case NL80211_IFTYPE_STATION:
1132                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1133                                                 force_assoc_off,
1134                                                 bssid_override);
1135                 break;
1136         case NL80211_IFTYPE_AP:
1137                 if (!vif->p2p)
1138                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1139                 else
1140                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1141                 break;
1142         case NL80211_IFTYPE_MONITOR:
1143                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1144         case NL80211_IFTYPE_P2P_DEVICE:
1145                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1146         case NL80211_IFTYPE_ADHOC:
1147                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1148         default:
1149                 break;
1150         }
1151
1152         return -EOPNOTSUPP;
1153 }
1154
1155 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1156 {
1157         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1158         int ret;
1159
1160         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1161                       vif->addr, ieee80211_vif_type_p2p(vif)))
1162                 return -EIO;
1163
1164         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1165                                    true, NULL);
1166         if (ret)
1167                 return ret;
1168
1169         /* will only do anything at resume from D3 time */
1170         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1171
1172         mvmvif->uploaded = true;
1173         return 0;
1174 }
1175
1176 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1177                              bool force_assoc_off, const u8 *bssid_override)
1178 {
1179         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1180
1181         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1182                       vif->addr, ieee80211_vif_type_p2p(vif)))
1183                 return -EIO;
1184
1185         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1186                                     force_assoc_off, bssid_override);
1187 }
1188
1189 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1190 {
1191         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1192         struct iwl_mac_ctx_cmd cmd;
1193         int ret;
1194
1195         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1196                       vif->addr, ieee80211_vif_type_p2p(vif)))
1197                 return -EIO;
1198
1199         memset(&cmd, 0, sizeof(cmd));
1200
1201         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1202                                                            mvmvif->color));
1203         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1204
1205         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1206                                    sizeof(cmd), &cmd);
1207         if (ret) {
1208                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1209                 return ret;
1210         }
1211
1212         mvmvif->uploaded = false;
1213
1214         if (vif->type == NL80211_IFTYPE_MONITOR)
1215                 mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1216
1217         return 0;
1218 }
1219
1220 static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1221                                    struct ieee80211_vif *csa_vif, u32 gp2)
1222 {
1223         struct iwl_mvm_vif *mvmvif =
1224                         iwl_mvm_vif_from_mac80211(csa_vif);
1225
1226         if (!ieee80211_csa_is_complete(csa_vif)) {
1227                 int c = ieee80211_csa_update_counter(csa_vif);
1228
1229                 iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1230                 if (csa_vif->p2p &&
1231                     !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2) {
1232                         u32 rel_time = (c + 1) *
1233                                        csa_vif->bss_conf.beacon_int -
1234                                        IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1235                         u32 apply_time = gp2 + rel_time * 1024;
1236
1237                         iwl_mvm_schedule_csa_period(mvm, csa_vif,
1238                                          IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1239                                          IWL_MVM_CHANNEL_SWITCH_MARGIN,
1240                                          apply_time);
1241                 }
1242         } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1243                 /* we don't have CSA NoA scheduled yet, switch now */
1244                 ieee80211_csa_finish(csa_vif);
1245                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1246         }
1247 }
1248
1249 int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1250                             struct iwl_rx_cmd_buffer *rxb,
1251                             struct iwl_device_cmd *cmd)
1252 {
1253         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1254         struct iwl_mvm_tx_resp *beacon_notify_hdr;
1255         struct ieee80211_vif *csa_vif;
1256         struct ieee80211_vif *tx_blocked_vif;
1257         u64 tsf;
1258
1259         lockdep_assert_held(&mvm->mutex);
1260
1261         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_CAPA_EXTENDED_BEACON) {
1262                 struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1263
1264                 beacon_notify_hdr = &beacon->beacon_notify_hdr;
1265                 tsf = le64_to_cpu(beacon->tsf);
1266                 mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1267         } else {
1268                 struct iwl_beacon_notif *beacon = (void *)pkt->data;
1269
1270                 beacon_notify_hdr = &beacon->beacon_notify_hdr;
1271                 tsf = le64_to_cpu(beacon->tsf);
1272         }
1273
1274         IWL_DEBUG_RX(mvm,
1275                      "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1276                      le16_to_cpu(beacon_notify_hdr->status.status) &
1277                                                                 TX_STATUS_MSK,
1278                      beacon_notify_hdr->failure_frame, tsf,
1279                      mvm->ap_last_beacon_gp2,
1280                      le32_to_cpu(beacon_notify_hdr->initial_rate));
1281
1282         csa_vif = rcu_dereference_protected(mvm->csa_vif,
1283                                             lockdep_is_held(&mvm->mutex));
1284         if (unlikely(csa_vif && csa_vif->csa_active))
1285                 iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2);
1286
1287         tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1288                                                 lockdep_is_held(&mvm->mutex));
1289         if (unlikely(tx_blocked_vif)) {
1290                 struct iwl_mvm_vif *mvmvif =
1291                         iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1292
1293                 /*
1294                  * The channel switch is started and we have blocked the
1295                  * stations. If this is the first beacon (the timeout wasn't
1296                  * set), set the unblock timeout, otherwise countdown
1297                  */
1298                 if (!mvm->csa_tx_block_bcn_timeout)
1299                         mvm->csa_tx_block_bcn_timeout =
1300                                 IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1301                 else
1302                         mvm->csa_tx_block_bcn_timeout--;
1303
1304                 /* Check if the timeout is expired, and unblock tx */
1305                 if (mvm->csa_tx_block_bcn_timeout == 0) {
1306                         iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1307                         RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1308                 }
1309         }
1310
1311         return 0;
1312 }
1313
1314 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1315                                          struct ieee80211_vif *vif)
1316 {
1317         struct iwl_missed_beacons_notif *missed_beacons = _data;
1318         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1319
1320         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1321                 return;
1322
1323         /*
1324          * TODO: the threshold should be adjusted based on latency conditions,
1325          * and/or in case of a CS flow on one of the other AP vifs.
1326          */
1327         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1328              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1329                 ieee80211_beacon_loss(vif);
1330 }
1331
1332 int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1333                                     struct iwl_rx_cmd_buffer *rxb,
1334                                     struct iwl_device_cmd *cmd)
1335 {
1336         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1337         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1338
1339         IWL_DEBUG_INFO(mvm,
1340                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1341                        le32_to_cpu(mb->mac_id),
1342                        le32_to_cpu(mb->consec_missed_beacons),
1343                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1344                        le32_to_cpu(mb->num_recvd_beacons),
1345                        le32_to_cpu(mb->num_expected_beacons));
1346
1347         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1348                                                    IEEE80211_IFACE_ITER_NORMAL,
1349                                                    iwl_mvm_beacon_loss_iterator,
1350                                                    mb);
1351         return 0;
1352 }