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  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63
  64 #include <linux/etherdevice.h>
  65 #include <net/mac80211.h>
  66 #include "iwl-io.h"
  67 #include "iwl-prph.h"
  68 #include "fw-api.h"
  69 #include "mvm.h"
  70
  71 const u8 iwl_mvm_ac_to_tx_fifo[] = {
  72         IWL_MVM_TX_FIFO_VO,
  73         IWL_MVM_TX_FIFO_VI,
  74         IWL_MVM_TX_FIFO_BE,
  75         IWL_MVM_TX_FIFO_BK,
  76 };
  77
  78 struct iwl_mvm_mac_iface_iterator_data {
  79         struct iwl_mvm *mvm;
  80         struct ieee80211_vif *vif;
  81         unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  82         unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  83         unsigned long used_hw_queues[BITS_TO_LONGS(IWL_MVM_MAX_QUEUES)];
  84         enum iwl_tsf_id preferred_tsf;
  85         bool found_vif;
  86 };
  87
  88 static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
  89                                     struct ieee80211_vif *vif)
  90 {
  91         struct iwl_mvm_mac_iface_iterator_data *data = _data;
  92         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  93         u16 min_bi;
  94
  95         /* Skip the interface for which we are trying to assign a tsf_id  */
  96         if (vif == data->vif)
  97                 return;
  98
  99         /*
 100          * The TSF is a hardware/firmware resource, there are 4 and
 101          * the driver should assign and free them as needed. However,
 102          * there are cases where 2 MACs should share the same TSF ID
 103          * for the purpose of clock sync, an optimization to avoid
 104          * clock drift causing overlapping TBTTs/DTIMs for a GO and
 105          * client in the system.
 106          *
 107          * The firmware will decide according to the MAC type which
 108          * will be the master and slave. Clients that need to sync
 109          * with a remote station will be the master, and an AP or GO
 110          * will be the slave.
 111          *
 112          * Depending on the new interface type it can be slaved to
 113          * or become the master of an existing interface.
 114          */
 115         switch (data->vif->type) {
 116         case NL80211_IFTYPE_STATION:
 117                 /*
 118                  * The new interface is a client, so if the one we're iterating
 119                  * is an AP, and the beacon interval of the AP is a multiple or
 120                  * divisor of the beacon interval of the client, the same TSF
 121                  * should be used to avoid drift between the new client and
 122                  * existing AP. The existing AP will get drift updates from the
 123                  * new client context in this case.
 124                  */
 125                 if (vif->type != NL80211_IFTYPE_AP ||
 126                     data->preferred_tsf != NUM_TSF_IDS ||
 127                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 128                         break;
 129
 130                 min_bi = min(data->vif->bss_conf.beacon_int,
 131                              vif->bss_conf.beacon_int);
 132
 133                 if (!min_bi)
 134                         break;
 135
 136                 if ((data->vif->bss_conf.beacon_int -
 137                      vif->bss_conf.beacon_int) % min_bi == 0) {
 138                         data->preferred_tsf = mvmvif->tsf_id;
 139                         return;
 140                 }
 141                 break;
 142
 143         case NL80211_IFTYPE_AP:
 144                 /*
 145                  * The new interface is AP/GO, so if its beacon interval is a
 146                  * multiple or a divisor of the beacon interval of an existing
 147                  * interface, it should get drift updates from an existing
 148                  * client or use the same TSF as an existing GO. There's no
 149                  * drift between TSFs internally but if they used different
 150                  * TSFs then a new client MAC could update one of them and
 151                  * cause drift that way.
 152                  */
 153                 if ((vif->type != NL80211_IFTYPE_AP &&
 154                      vif->type != NL80211_IFTYPE_STATION) ||
 155                     data->preferred_tsf != NUM_TSF_IDS ||
 156                     !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 157                         break;
 158
 159                 min_bi = min(data->vif->bss_conf.beacon_int,
 160                              vif->bss_conf.beacon_int);
 161
 162                 if (!min_bi)
 163                         break;
 164
 165                 if ((data->vif->bss_conf.beacon_int -
 166                      vif->bss_conf.beacon_int) % min_bi == 0) {
 167                         data->preferred_tsf = mvmvif->tsf_id;
 168                         return;
 169                 }
 170                 break;
 171         default:
 172                 /*
 173                  * For all other interface types there's no need to
 174                  * take drift into account. Either they're exclusive
 175                  * like IBSS and monitor, or we don't care much about
 176                  * their TSF (like P2P Device), but we won't be able
 177                  * to share the TSF resource.
 178                  */
 179                 break;
 180         }
 181
 182         /*
 183          * Unless we exited above, we can't share the TSF resource
 184          * that the virtual interface we're iterating over is using
 185          * with the new one, so clear the available bit and if this
 186          * was the preferred one, reset that as well.
 187          */
 188         __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 189
 190         if (data->preferred_tsf == mvmvif->tsf_id)
 191                 data->preferred_tsf = NUM_TSF_IDS;
 192 }
 193
 194 static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 195                                        struct ieee80211_vif *vif)
 196 {
 197         struct iwl_mvm_mac_iface_iterator_data *data = _data;
 198         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 199         u32 ac;
 200
 201         /* Iterator may already find the interface being added -- skip it */
 202         if (vif == data->vif) {
 203                 data->found_vif = true;
 204                 return;
 205         }
 206
 207         /* Mark the queues used by the vif */
 208         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 209                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 210                         __set_bit(vif->hw_queue[ac], data->used_hw_queues);
 211
 212         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
 213                 __set_bit(vif->cab_queue, data->used_hw_queues);
 214
 215         /* Mark MAC IDs as used by clearing the available bit, and
 216          * (below) mark TSFs as used if their existing use is not
 217          * compatible with the new interface type.
 218          * No locking or atomic bit operations are needed since the
 219          * data is on the stack of the caller function.
 220          */
 221         __clear_bit(mvmvif->id, data->available_mac_ids);
 222
 223         /* find a suitable tsf_id */
 224         iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 225 }
 226
 227 /*
 228  * Get the mask of the queus used by the vif
 229  */
 230 u32 iwl_mvm_mac_get_queues_mask(struct iwl_mvm *mvm,
 231                                 struct ieee80211_vif *vif)
 232 {
 233         u32 qmask = 0, ac;
 234
 235         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 236                 return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 237
 238         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 239                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 240                         qmask |= BIT(vif->hw_queue[ac]);
 241
 242         return qmask;
 243 }
 244
 245 void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 246                                     struct ieee80211_vif *vif)
 247 {
 248         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 249         struct iwl_mvm_mac_iface_iterator_data data = {
 250                 .mvm = mvm,
 251                 .vif = vif,
 252                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 253                 /* no preference yet */
 254                 .preferred_tsf = NUM_TSF_IDS,
 255         };
 256
 257         ieee80211_iterate_active_interfaces_atomic(
 258                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 259                 iwl_mvm_mac_tsf_id_iter, &data);
 260
 261         if (data.preferred_tsf != NUM_TSF_IDS)
 262                 mvmvif->tsf_id = data.preferred_tsf;
 263         else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 264                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 265                                                 NUM_TSF_IDS);
 266 }
 267
 268 static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
 269                                                struct ieee80211_vif *vif)
 270 {
 271         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 272         struct iwl_mvm_mac_iface_iterator_data data = {
 273                 .mvm = mvm,
 274                 .vif = vif,
 275                 .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 276                 .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 277                 /* no preference yet */
 278                 .preferred_tsf = NUM_TSF_IDS,
 279                 .used_hw_queues = {
 280                         BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 281                         BIT(mvm->aux_queue) |
 282                         BIT(IWL_MVM_CMD_QUEUE)
 283                 },
 284                 .found_vif = false,
 285         };
 286         u32 ac;
 287         int ret, i;
 288
 289         /*
 290          * Allocate a MAC ID and a TSF for this MAC, along with the queues
 291          * and other resources.
 292          */
 293
 294         /*
 295          * Before the iterator, we start with all MAC IDs and TSFs available.
 296          *
 297          * During iteration, all MAC IDs are cleared that are in use by other
 298          * virtual interfaces, and all TSF IDs are cleared that can't be used
 299          * by this new virtual interface because they're used by an interface
 300          * that can't share it with the new one.
 301          * At the same time, we check if there's a preferred TSF in the case
 302          * that we should share it with another interface.
 303          */
 304
 305         /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 306         switch (vif->type) {
 307         case NL80211_IFTYPE_ADHOC:
 308                 break;
 309         case NL80211_IFTYPE_STATION:
 310                 if (!vif->p2p)
 311                         break;
 312                 /* fall through */
 313         default:
 314                 __clear_bit(0, data.available_mac_ids);
 315         }
 316
 317         ieee80211_iterate_active_interfaces_atomic(
 318                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 319                 iwl_mvm_mac_iface_iterator, &data);
 320
 321         /*
 322          * In the case we're getting here during resume, it's similar to
 323          * firmware restart, and with RESUME_ALL the iterator will find
 324          * the vif being added already.
 325          * We don't want to reassign any IDs in either case since doing
 326          * so would probably assign different IDs (as interfaces aren't
 327          * necessarily added in the same order), but the old IDs were
 328          * preserved anyway, so skip ID assignment for both resume and
 329          * recovery.
 330          */
 331         if (data.found_vif)
 332                 return 0;
 333
 334         /* Therefore, in recovery, we can't get here */
 335         if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 336                 return -EBUSY;
 337
 338         mvmvif->id = find_first_bit(data.available_mac_ids,
 339                                     NUM_MAC_INDEX_DRIVER);
 340         if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 341                 IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 342                 ret = -EIO;
 343                 goto exit_fail;
 344         }
 345
 346         if (data.preferred_tsf != NUM_TSF_IDS)
 347                 mvmvif->tsf_id = data.preferred_tsf;
 348         else
 349                 mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 350                                                 NUM_TSF_IDS);
 351         if (mvmvif->tsf_id == NUM_TSF_IDS) {
 352                 IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 353                 ret = -EIO;
 354                 goto exit_fail;
 355         }
 356
 357         mvmvif->color = 0;
 358
 359         INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 360         mvmvif->time_event_data.id = TE_MAX;
 361
 362         /* No need to allocate data queues to P2P Device MAC.*/
 363         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 364                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 365                         vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 366
 367                 return 0;
 368         }
 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(data.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, data.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(data.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_trans_ac_txq_enable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE,
 430                                         IWL_MVM_TX_FIFO_VO);
 431                 break;
 432         case NL80211_IFTYPE_AP:
 433                 iwl_trans_ac_txq_enable(mvm->trans, 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_trans_ac_txq_enable(mvm->trans, 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_trans_txq_disable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE);
 455                 break;
 456         case NL80211_IFTYPE_AP:
 457                 iwl_trans_txq_disable(mvm->trans, vif->cab_queue);
 458                 /* fall through */
 459         default:
 460                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 461                         iwl_trans_txq_disable(mvm->trans, 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                                         u32 action)
 589 {
 590         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 591         struct ieee80211_chanctx_conf *chanctx;
 592         bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 593                              IEEE80211_HT_OP_MODE_PROTECTION);
 594         u8 cck_ack_rates, ofdm_ack_rates;
 595         int i;
 596
 597         cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 598                                                             mvmvif->color));
 599         cmd->action = cpu_to_le32(action);
 600
 601         switch (vif->type) {
 602         case NL80211_IFTYPE_STATION:
 603                 if (vif->p2p)
 604                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 605                 else
 606                         cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 607                 break;
 608         case NL80211_IFTYPE_AP:
 609                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 610                 break;
 611         case NL80211_IFTYPE_MONITOR:
 612                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 613                 break;
 614         case NL80211_IFTYPE_P2P_DEVICE:
 615                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 616                 break;
 617         case NL80211_IFTYPE_ADHOC:
 618                 cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 619                 break;
 620         default:
 621                 WARN_ON_ONCE(1);
 622         }
 623
 624         cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 625
 626         memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 627         if (vif->bss_conf.bssid)
 628                 memcpy(cmd->bssid_addr, vif->bss_conf.bssid, ETH_ALEN);
 629         else
 630                 eth_broadcast_addr(cmd->bssid_addr);
 631
 632         rcu_read_lock();
 633         chanctx = rcu_dereference(vif->chanctx_conf);
 634         iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 635                                             : IEEE80211_BAND_2GHZ,
 636                           &cck_ack_rates, &ofdm_ack_rates);
 637         rcu_read_unlock();
 638
 639         cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 640         cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 641
 642         cmd->cck_short_preamble =
 643                 cpu_to_le32(vif->bss_conf.use_short_preamble ?
 644                             MAC_FLG_SHORT_PREAMBLE : 0);
 645         cmd->short_slot =
 646                 cpu_to_le32(vif->bss_conf.use_short_slot ?
 647                             MAC_FLG_SHORT_SLOT : 0);
 648
 649         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 650                 u8 txf = iwl_mvm_ac_to_tx_fifo[i];
 651
 652                 cmd->ac[txf].cw_min =
 653                         cpu_to_le16(mvmvif->queue_params[i].cw_min);
 654                 cmd->ac[txf].cw_max =
 655                         cpu_to_le16(mvmvif->queue_params[i].cw_max);
 656                 cmd->ac[txf].edca_txop =
 657                         cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 658                 cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 659                 cmd->ac[txf].fifos_mask = BIT(txf);
 660         }
 661
 662         /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
 663         if (vif->type == NL80211_IFTYPE_AP)
 664                 cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
 665                         BIT(IWL_MVM_TX_FIFO_MCAST);
 666
 667         if (vif->bss_conf.qos)
 668                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 669
 670         if (vif->bss_conf.use_cts_prot) {
 671                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 672                 cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_SELF_CTS_EN);
 673         }
 674         IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 675                        vif->bss_conf.use_cts_prot,
 676                        vif->bss_conf.ht_operation_mode);
 677         if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 678                 cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 679         if (ht_enabled)
 680                 iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 681
 682         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 683 }
 684
 685 static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 686                                      struct iwl_mac_ctx_cmd *cmd)
 687 {
 688         int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 689                                        sizeof(*cmd), cmd);
 690         if (ret)
 691                 IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 692                         le32_to_cpu(cmd->action), ret);
 693         return ret;
 694 }
 695
 696 static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 697                                     struct ieee80211_vif *vif,
 698                                     u32 action, bool force_assoc_off)
 699 {
 700         struct iwl_mac_ctx_cmd cmd = {};
 701         struct iwl_mac_data_sta *ctxt_sta;
 702
 703         WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 704
 705         /* Fill the common data for all mac context types */
 706         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 707
 708         if (vif->p2p) {
 709                 struct ieee80211_p2p_noa_attr *noa =
 710                         &vif->bss_conf.p2p_noa_attr;
 711
 712                 cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 713                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 714                 ctxt_sta = &cmd.p2p_sta.sta;
 715         } else {
 716                 ctxt_sta = &cmd.sta;
 717         }
 718
 719         /* We need the dtim_period to set the MAC as associated */
 720         if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 721             !force_assoc_off) {
 722                 u32 dtim_offs;
 723
 724                 /* Allow beacons to pass through as long as we are not
 725                  * associated, or we do not have dtim period information.
 726                  */
 727                 cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 728
 729                 /*
 730                  * The DTIM count counts down, so when it is N that means N
 731                  * more beacon intervals happen until the DTIM TBTT. Therefore
 732                  * add this to the current time. If that ends up being in the
 733                  * future, the firmware will handle it.
 734                  *
 735                  * Also note that the system_timestamp (which we get here as
 736                  * "sync_device_ts") and TSF timestamp aren't at exactly the
 737                  * same offset in the frame -- the TSF is at the first symbol
 738                  * of the TSF, the system timestamp is at signal acquisition
 739                  * time. This means there's an offset between them of at most
 740                  * a few hundred microseconds (24 * 8 bits + PLCP time gives
 741                  * 384us in the longest case), this is currently not relevant
 742                  * as the firmware wakes up around 2ms before the TBTT.
 743                  */
 744                 dtim_offs = vif->bss_conf.sync_dtim_count *
 745                                 vif->bss_conf.beacon_int;
 746                 /* convert TU to usecs */
 747                 dtim_offs *= 1024;
 748
 749                 ctxt_sta->dtim_tsf =
 750                         cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 751                 ctxt_sta->dtim_time =
 752                         cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 753
 754                 IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 755                                le64_to_cpu(ctxt_sta->dtim_tsf),
 756                                le32_to_cpu(ctxt_sta->dtim_time),
 757                                dtim_offs);
 758
 759                 ctxt_sta->is_assoc = cpu_to_le32(1);
 760         } else {
 761                 ctxt_sta->is_assoc = cpu_to_le32(0);
 762         }
 763
 764         ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 765         ctxt_sta->bi_reciprocal =
 766                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 767         ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 768                                               vif->bss_conf.dtim_period);
 769         ctxt_sta->dtim_reciprocal =
 770                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 771                                                vif->bss_conf.dtim_period));
 772
 773         ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 774         ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 775
 776         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 777 }
 778
 779 static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 780                                          struct ieee80211_vif *vif,
 781                                          u32 action)
 782 {
 783         struct iwl_mac_ctx_cmd cmd = {};
 784
 785         WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 786
 787         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 788
 789         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 790                                        MAC_FILTER_IN_CONTROL_AND_MGMT |
 791                                        MAC_FILTER_IN_BEACON |
 792                                        MAC_FILTER_IN_PROBE_REQUEST |
 793                                        MAC_FILTER_IN_CRC32);
 794         mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
 795
 796         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 797 }
 798
 799 static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 800                                      struct ieee80211_vif *vif,
 801                                      u32 action)
 802 {
 803         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 804         struct iwl_mac_ctx_cmd cmd = {};
 805
 806         WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 807
 808         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 809
 810         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 811                                        MAC_FILTER_IN_PROBE_REQUEST);
 812
 813         /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 814         cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 815         cmd.ibss.bi_reciprocal =
 816                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 817
 818         /* TODO: Assumes that the beacon id == mac context id */
 819         cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 820
 821         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 822 }
 823
 824 struct iwl_mvm_go_iterator_data {
 825         bool go_active;
 826 };
 827
 828 static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 829 {
 830         struct iwl_mvm_go_iterator_data *data = _data;
 831         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 832
 833         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 834             mvmvif->ap_ibss_active)
 835                 data->go_active = true;
 836 }
 837
 838 static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 839                                            struct ieee80211_vif *vif,
 840                                            u32 action)
 841 {
 842         struct iwl_mac_ctx_cmd cmd = {};
 843         struct iwl_mvm_go_iterator_data data = {};
 844
 845         WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 846
 847         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
 848
 849         cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 850
 851         /* Override the filter flags to accept only probe requests */
 852         cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 853
 854         /*
 855          * This flag should be set to true when the P2P Device is
 856          * discoverable and there is at least another active P2P GO. Settings
 857          * this flag will allow the P2P Device to be discoverable on other
 858          * channels in addition to its listen channel.
 859          * Note that this flag should not be set in other cases as it opens the
 860          * Rx filters on all MAC and increases the number of interrupts.
 861          */
 862         ieee80211_iterate_active_interfaces_atomic(
 863                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 864                 iwl_mvm_go_iterator, &data);
 865
 866         cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 867         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 868 }
 869
 870 static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 871                                      struct iwl_mac_beacon_cmd *beacon_cmd,
 872                                      u8 *beacon, u32 frame_size)
 873 {
 874         u32 tim_idx;
 875         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 876
 877         /* The index is relative to frame start but we start looking at the
 878          * variable-length part of the beacon. */
 879         tim_idx = mgmt->u.beacon.variable - beacon;
 880
 881         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 882         while ((tim_idx < (frame_size - 2)) &&
 883                         (beacon[tim_idx] != WLAN_EID_TIM))
 884                 tim_idx += beacon[tim_idx+1] + 2;
 885
 886         /* If TIM field was found, set variables */
 887         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 888                 beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
 889                 beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
 890         } else {
 891                 IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 892         }
 893 }
 894
 895 static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
 896                                         struct ieee80211_vif *vif,
 897                                         struct sk_buff *beacon)
 898 {
 899         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 900         struct iwl_host_cmd cmd = {
 901                 .id = BEACON_TEMPLATE_CMD,
 902                 .flags = CMD_ASYNC,
 903         };
 904         struct iwl_mac_beacon_cmd beacon_cmd = {};
 905         struct ieee80211_tx_info *info;
 906         u32 beacon_skb_len;
 907         u32 rate;
 908
 909         if (WARN_ON(!beacon))
 910                 return -EINVAL;
 911
 912         beacon_skb_len = beacon->len;
 913
 914         /* TODO: for now the beacon template id is set to be the mac context id.
 915          * Might be better to handle it as another resource ... */
 916         beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
 917
 918         /* Set up TX command fields */
 919         beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
 920         beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
 921         beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 922         beacon_cmd.tx.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 923                                              TX_CMD_FLG_BT_DIS  |
 924                                              TX_CMD_FLG_TSF);
 925
 926         mvm->mgmt_last_antenna_idx =
 927                 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
 928                                      mvm->mgmt_last_antenna_idx);
 929
 930         beacon_cmd.tx.rate_n_flags =
 931                 cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 932                             RATE_MCS_ANT_POS);
 933
 934         info = IEEE80211_SKB_CB(beacon);
 935
 936         if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) {
 937                 rate = IWL_FIRST_OFDM_RATE;
 938         } else {
 939                 rate = IWL_FIRST_CCK_RATE;
 940                 beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 941         }
 942         beacon_cmd.tx.rate_n_flags |=
 943                 cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 944
 945         /* Set up TX beacon command fields */
 946         if (vif->type == NL80211_IFTYPE_AP)
 947                 iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
 948                                          beacon->data,
 949                                          beacon_skb_len);
 950
 951         /* Submit command */
 952         cmd.len[0] = sizeof(beacon_cmd);
 953         cmd.data[0] = &beacon_cmd;
 954         cmd.dataflags[0] = 0;
 955         cmd.len[1] = beacon_skb_len;
 956         cmd.data[1] = beacon->data;
 957         cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
 958
 959         return iwl_mvm_send_cmd(mvm, &cmd);
 960 }
 961
 962 /* The beacon template for the AP/GO/IBSS has changed and needs update */
 963 int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
 964                                     struct ieee80211_vif *vif)
 965 {
 966         struct sk_buff *beacon;
 967         int ret;
 968
 969         WARN_ON(vif->type != NL80211_IFTYPE_AP &&
 970                 vif->type != NL80211_IFTYPE_ADHOC);
 971
 972         beacon = ieee80211_beacon_get(mvm->hw, vif);
 973         if (!beacon)
 974                 return -ENOMEM;
 975
 976         ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
 977         dev_kfree_skb(beacon);
 978         return ret;
 979 }
 980
 981 struct iwl_mvm_mac_ap_iterator_data {
 982         struct iwl_mvm *mvm;
 983         struct ieee80211_vif *vif;
 984         u32 beacon_device_ts;
 985         u16 beacon_int;
 986 };
 987
 988 /* Find the beacon_device_ts and beacon_int for a managed interface */
 989 static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
 990                                     struct ieee80211_vif *vif)
 991 {
 992         struct iwl_mvm_mac_ap_iterator_data *data = _data;
 993
 994         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
 995                 return;
 996
 997         /* Station client has higher priority over P2P client*/
 998         if (vif->p2p && data->beacon_device_ts)
 999                 return;
1000
1001         data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1002         data->beacon_int = vif->bss_conf.beacon_int;
1003 }
1004
1005 /*
1006  * Fill the specific data for mac context of type AP of P2P GO
1007  */
1008 static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1009                                          struct ieee80211_vif *vif,
1010                                          struct iwl_mac_data_ap *ctxt_ap,
1011                                          bool add)
1012 {
1013         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1014         struct iwl_mvm_mac_ap_iterator_data data = {
1015                 .mvm = mvm,
1016                 .vif = vif,
1017                 .beacon_device_ts = 0
1018         };
1019
1020         ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1021         ctxt_ap->bi_reciprocal =
1022                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1023         ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1024                                              vif->bss_conf.dtim_period);
1025         ctxt_ap->dtim_reciprocal =
1026                 cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1027                                                vif->bss_conf.dtim_period));
1028
1029         ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1030
1031         /*
1032          * Only set the beacon time when the MAC is being added, when we
1033          * just modify the MAC then we should keep the time -- the firmware
1034          * can otherwise have a "jumping" TBTT.
1035          */
1036         if (add) {
1037                 /*
1038                  * If there is a station/P2P client interface which is
1039                  * associated, set the AP's TBTT far enough from the station's
1040                  * TBTT. Otherwise, set it to the current system time
1041                  */
1042                 ieee80211_iterate_active_interfaces_atomic(
1043                         mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1044                         iwl_mvm_mac_ap_iterator, &data);
1045
1046                 if (data.beacon_device_ts) {
1047                         u32 rand = (prandom_u32() % (64 - 36)) + 36;
1048                         mvmvif->ap_beacon_time = data.beacon_device_ts +
1049                                 ieee80211_tu_to_usec(data.beacon_int * rand /
1050                                                      100);
1051                 } else {
1052                         mvmvif->ap_beacon_time =
1053                                 iwl_read_prph(mvm->trans,
1054                                               DEVICE_SYSTEM_TIME_REG);
1055                 }
1056         }
1057
1058         ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1059         ctxt_ap->beacon_tsf = 0; /* unused */
1060
1061         /* TODO: Assume that the beacon id == mac context id */
1062         ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1063 }
1064
1065 static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1066                                    struct ieee80211_vif *vif,
1067                                    u32 action)
1068 {
1069         struct iwl_mac_ctx_cmd cmd = {};
1070
1071         WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1072
1073         /* Fill the common data for all mac context types */
1074         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
1075
1076         /* Also enable probe requests to pass */
1077         cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
1078
1079         /* Fill the data specific for ap mode */
1080         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
1081                                      action == FW_CTXT_ACTION_ADD);
1082
1083         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1084 }
1085
1086 static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1087                                    struct ieee80211_vif *vif,
1088                                    u32 action)
1089 {
1090         struct iwl_mac_ctx_cmd cmd = {};
1091         struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1092
1093         WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1094
1095         /* Fill the common data for all mac context types */
1096         iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
1097
1098         /* Fill the data specific for GO mode */
1099         iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
1100                                      action == FW_CTXT_ACTION_ADD);
1101
1102         cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1103                                         IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1104         cmd.go.opp_ps_enabled =
1105                         cpu_to_le32(!!(noa->oppps_ctwindow &
1106                                         IEEE80211_P2P_OPPPS_ENABLE_BIT));
1107
1108         return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1109 }
1110
1111 static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1112                                 u32 action, bool force_assoc_off)
1113 {
1114         switch (vif->type) {
1115         case NL80211_IFTYPE_STATION:
1116                 return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1117                                                 force_assoc_off);
1118                 break;
1119         case NL80211_IFTYPE_AP:
1120                 if (!vif->p2p)
1121                         return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1122                 else
1123                         return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1124                 break;
1125         case NL80211_IFTYPE_MONITOR:
1126                 return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1127         case NL80211_IFTYPE_P2P_DEVICE:
1128                 return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1129         case NL80211_IFTYPE_ADHOC:
1130                 return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1131         default:
1132                 break;
1133         }
1134
1135         return -EOPNOTSUPP;
1136 }
1137
1138 int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1139 {
1140         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1141         int ret;
1142
1143         if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1144                       vif->addr, ieee80211_vif_type_p2p(vif)))
1145                 return -EIO;
1146
1147         ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1148                                    true);
1149         if (ret)
1150                 return ret;
1151
1152         /* will only do anything at resume from D3 time */
1153         iwl_mvm_set_last_nonqos_seq(mvm, vif);
1154
1155         mvmvif->uploaded = true;
1156         return 0;
1157 }
1158
1159 int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1160                              bool force_assoc_off)
1161 {
1162         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1163
1164         if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1165                       vif->addr, ieee80211_vif_type_p2p(vif)))
1166                 return -EIO;
1167
1168         return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1169                                     force_assoc_off);
1170 }
1171
1172 int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1173 {
1174         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1175         struct iwl_mac_ctx_cmd cmd;
1176         int ret;
1177
1178         if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1179                       vif->addr, ieee80211_vif_type_p2p(vif)))
1180                 return -EIO;
1181
1182         memset(&cmd, 0, sizeof(cmd));
1183
1184         cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1185                                                            mvmvif->color));
1186         cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1187
1188         ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1189                                    sizeof(cmd), &cmd);
1190         if (ret) {
1191                 IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1192                 return ret;
1193         }
1194
1195         mvmvif->uploaded = false;
1196
1197         if (vif->type == NL80211_IFTYPE_MONITOR)
1198                 mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1199
1200         return 0;
1201 }
1202
1203 int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1204                             struct iwl_rx_cmd_buffer *rxb,
1205                             struct iwl_device_cmd *cmd)
1206 {
1207         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1208         struct iwl_beacon_notif *beacon = (void *)pkt->data;
1209         u16 status __maybe_unused =
1210                 le16_to_cpu(beacon->beacon_notify_hdr.status.status);
1211         u32 rate __maybe_unused =
1212                 le32_to_cpu(beacon->beacon_notify_hdr.initial_rate);
1213
1214         lockdep_assert_held(&mvm->mutex);
1215
1216         IWL_DEBUG_RX(mvm, "beacon status %#x retries:%d tsf:0x%16llX rate:%d\n",
1217                      status & TX_STATUS_MSK,
1218                      beacon->beacon_notify_hdr.failure_frame,
1219                      le64_to_cpu(beacon->tsf),
1220                      rate);
1221
1222         if (unlikely(mvm->csa_vif && mvm->csa_vif->csa_active)) {
1223                 if (!ieee80211_csa_is_complete(mvm->csa_vif)) {
1224                         iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm->csa_vif);
1225                 } else {
1226                         ieee80211_csa_finish(mvm->csa_vif);
1227                         mvm->csa_vif = NULL;
1228                 }
1229         }
1230
1231         return 0;
1232 }
1233
1234 static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1235                                          struct ieee80211_vif *vif)
1236 {
1237         struct iwl_missed_beacons_notif *missed_beacons = _data;
1238         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1239
1240         if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1241                 return;
1242
1243         /*
1244          * TODO: the threshold should be adjusted based on latency conditions,
1245          * and/or in case of a CS flow on one of the other AP vifs.
1246          */
1247         if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1248              IWL_MVM_MISSED_BEACONS_THRESHOLD)
1249                 ieee80211_beacon_loss(vif);
1250 }
1251
1252 int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1253                                     struct iwl_rx_cmd_buffer *rxb,
1254                                     struct iwl_device_cmd *cmd)
1255 {
1256         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1257         struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1258
1259         IWL_DEBUG_INFO(mvm,
1260                        "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1261                        le32_to_cpu(mb->mac_id),
1262                        le32_to_cpu(mb->consec_missed_beacons),
1263                        le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1264                        le32_to_cpu(mb->num_recvd_beacons),
1265                        le32_to_cpu(mb->num_expected_beacons));
1266
1267         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1268                                                    IEEE80211_IFACE_ITER_NORMAL,
1269                                                    iwl_mvm_beacon_loss_iterator,
1270                                                    mb);
1271         return 0;
1272 }