linux/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
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   1/******************************************************************************
   2 *
   3 * This file is provided under a dual BSD/GPLv2 license.  When using or
   4 * redistributing this file, you may do so under either license.
   5 *
   6 * GPL LICENSE SUMMARY
   7 *
   8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of version 2 of the GNU General Public License as
  14 * published by the Free Software Foundation.
  15 *
  16 * This program is distributed in the hope that it will be useful, but
  17 * WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 * General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24 * USA
  25 *
  26 * The full GNU General Public License is included in this distribution
  27 * in the file called COPYING.
  28 *
  29 * Contact Information:
  30 *  Intel Linux Wireless <linuxwifi@intel.com>
  31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32 *
  33 * BSD LICENSE
  34 *
  35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  37 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
  38 * All rights reserved.
  39 *
  40 * Redistribution and use in source and binary forms, with or without
  41 * modification, are permitted provided that the following conditions
  42 * are met:
  43 *
  44 *  * Redistributions of source code must retain the above copyright
  45 *    notice, this list of conditions and the following disclaimer.
  46 *  * Redistributions in binary form must reproduce the above copyright
  47 *    notice, this list of conditions and the following disclaimer in
  48 *    the documentation and/or other materials provided with the
  49 *    distribution.
  50 *  * Neither the name Intel Corporation nor the names of its
  51 *    contributors may be used to endorse or promote products derived
  52 *    from this software without specific prior written permission.
  53 *
  54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65 *
  66 *****************************************************************************/
  67
  68#include <linux/etherdevice.h>
  69#include <net/mac80211.h>
  70#include "iwl-io.h"
  71#include "iwl-prph.h"
  72#include "fw-api.h"
  73#include "mvm.h"
  74#include "time-event.h"
  75
  76const u8 iwl_mvm_ac_to_tx_fifo[] = {
  77        IWL_MVM_TX_FIFO_VO,
  78        IWL_MVM_TX_FIFO_VI,
  79        IWL_MVM_TX_FIFO_BE,
  80        IWL_MVM_TX_FIFO_BK,
  81};
  82
  83const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = {
  84        IWL_GEN2_EDCA_TX_FIFO_VO,
  85        IWL_GEN2_EDCA_TX_FIFO_VI,
  86        IWL_GEN2_EDCA_TX_FIFO_BE,
  87        IWL_GEN2_EDCA_TX_FIFO_BK,
  88};
  89
  90struct iwl_mvm_mac_iface_iterator_data {
  91        struct iwl_mvm *mvm;
  92        struct ieee80211_vif *vif;
  93        unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
  94        unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
  95        enum iwl_tsf_id preferred_tsf;
  96        bool found_vif;
  97};
  98
  99struct iwl_mvm_hw_queues_iface_iterator_data {
 100        struct ieee80211_vif *exclude_vif;
 101        unsigned long used_hw_queues;
 102};
 103
 104static void iwl_mvm_mac_tsf_id_iter(void *_data, u8 *mac,
 105                                    struct ieee80211_vif *vif)
 106{
 107        struct iwl_mvm_mac_iface_iterator_data *data = _data;
 108        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 109        u16 min_bi;
 110
 111        /* Skip the interface for which we are trying to assign a tsf_id  */
 112        if (vif == data->vif)
 113                return;
 114
 115        /*
 116         * The TSF is a hardware/firmware resource, there are 4 and
 117         * the driver should assign and free them as needed. However,
 118         * there are cases where 2 MACs should share the same TSF ID
 119         * for the purpose of clock sync, an optimization to avoid
 120         * clock drift causing overlapping TBTTs/DTIMs for a GO and
 121         * client in the system.
 122         *
 123         * The firmware will decide according to the MAC type which
 124         * will be the master and slave. Clients that need to sync
 125         * with a remote station will be the master, and an AP or GO
 126         * will be the slave.
 127         *
 128         * Depending on the new interface type it can be slaved to
 129         * or become the master of an existing interface.
 130         */
 131        switch (data->vif->type) {
 132        case NL80211_IFTYPE_STATION:
 133                /*
 134                 * The new interface is a client, so if the one we're iterating
 135                 * is an AP, and the beacon interval of the AP is a multiple or
 136                 * divisor of the beacon interval of the client, the same TSF
 137                 * should be used to avoid drift between the new client and
 138                 * existing AP. The existing AP will get drift updates from the
 139                 * new client context in this case.
 140                 */
 141                if (vif->type != NL80211_IFTYPE_AP ||
 142                    data->preferred_tsf != NUM_TSF_IDS ||
 143                    !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 144                        break;
 145
 146                min_bi = min(data->vif->bss_conf.beacon_int,
 147                             vif->bss_conf.beacon_int);
 148
 149                if (!min_bi)
 150                        break;
 151
 152                if ((data->vif->bss_conf.beacon_int -
 153                     vif->bss_conf.beacon_int) % min_bi == 0) {
 154                        data->preferred_tsf = mvmvif->tsf_id;
 155                        return;
 156                }
 157                break;
 158
 159        case NL80211_IFTYPE_AP:
 160                /*
 161                 * The new interface is AP/GO, so if its beacon interval is a
 162                 * multiple or a divisor of the beacon interval of an existing
 163                 * interface, it should get drift updates from an existing
 164                 * client or use the same TSF as an existing GO. There's no
 165                 * drift between TSFs internally but if they used different
 166                 * TSFs then a new client MAC could update one of them and
 167                 * cause drift that way.
 168                 */
 169                if ((vif->type != NL80211_IFTYPE_AP &&
 170                     vif->type != NL80211_IFTYPE_STATION) ||
 171                    data->preferred_tsf != NUM_TSF_IDS ||
 172                    !test_bit(mvmvif->tsf_id, data->available_tsf_ids))
 173                        break;
 174
 175                min_bi = min(data->vif->bss_conf.beacon_int,
 176                             vif->bss_conf.beacon_int);
 177
 178                if (!min_bi)
 179                        break;
 180
 181                if ((data->vif->bss_conf.beacon_int -
 182                     vif->bss_conf.beacon_int) % min_bi == 0) {
 183                        data->preferred_tsf = mvmvif->tsf_id;
 184                        return;
 185                }
 186                break;
 187        default:
 188                /*
 189                 * For all other interface types there's no need to
 190                 * take drift into account. Either they're exclusive
 191                 * like IBSS and monitor, or we don't care much about
 192                 * their TSF (like P2P Device), but we won't be able
 193                 * to share the TSF resource.
 194                 */
 195                break;
 196        }
 197
 198        /*
 199         * Unless we exited above, we can't share the TSF resource
 200         * that the virtual interface we're iterating over is using
 201         * with the new one, so clear the available bit and if this
 202         * was the preferred one, reset that as well.
 203         */
 204        __clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
 205
 206        if (data->preferred_tsf == mvmvif->tsf_id)
 207                data->preferred_tsf = NUM_TSF_IDS;
 208}
 209
 210/*
 211 * Get the mask of the queues used by the vif
 212 */
 213u32 iwl_mvm_mac_get_queues_mask(struct ieee80211_vif *vif)
 214{
 215        u32 qmask = 0, ac;
 216
 217        if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 218                return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
 219
 220        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 221                if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 222                        qmask |= BIT(vif->hw_queue[ac]);
 223        }
 224
 225        if (vif->type == NL80211_IFTYPE_AP ||
 226            vif->type == NL80211_IFTYPE_ADHOC)
 227                qmask |= BIT(vif->cab_queue);
 228
 229        return qmask;
 230}
 231
 232static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac,
 233                                         struct ieee80211_vif *vif)
 234{
 235        struct iwl_mvm_hw_queues_iface_iterator_data *data = _data;
 236
 237        /* exclude the given vif */
 238        if (vif == data->exclude_vif)
 239                return;
 240
 241        data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif);
 242}
 243
 244unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,
 245                                         struct ieee80211_vif *exclude_vif)
 246{
 247        struct iwl_mvm_hw_queues_iface_iterator_data data = {
 248                .exclude_vif = exclude_vif,
 249                .used_hw_queues =
 250                        BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
 251                        BIT(mvm->aux_queue) |
 252                        BIT(IWL_MVM_DQA_GCAST_QUEUE),
 253        };
 254
 255        lockdep_assert_held(&mvm->mutex);
 256
 257        /* mark all VIF used hw queues */
 258        ieee80211_iterate_active_interfaces_atomic(
 259                mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 260                iwl_mvm_iface_hw_queues_iter, &data);
 261
 262        return data.used_hw_queues;
 263}
 264
 265static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
 266                                       struct ieee80211_vif *vif)
 267{
 268        struct iwl_mvm_mac_iface_iterator_data *data = _data;
 269        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 270
 271        /* Iterator may already find the interface being added -- skip it */
 272        if (vif == data->vif) {
 273                data->found_vif = true;
 274                return;
 275        }
 276
 277        /* Mark MAC IDs as used by clearing the available bit, and
 278         * (below) mark TSFs as used if their existing use is not
 279         * compatible with the new interface type.
 280         * No locking or atomic bit operations are needed since the
 281         * data is on the stack of the caller function.
 282         */
 283        __clear_bit(mvmvif->id, data->available_mac_ids);
 284
 285        /* find a suitable tsf_id */
 286        iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
 287}
 288
 289void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
 290                                    struct ieee80211_vif *vif)
 291{
 292        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 293        struct iwl_mvm_mac_iface_iterator_data data = {
 294                .mvm = mvm,
 295                .vif = vif,
 296                .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 297                /* no preference yet */
 298                .preferred_tsf = NUM_TSF_IDS,
 299        };
 300
 301        ieee80211_iterate_active_interfaces_atomic(
 302                mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 303                iwl_mvm_mac_tsf_id_iter, &data);
 304
 305        if (data.preferred_tsf != NUM_TSF_IDS)
 306                mvmvif->tsf_id = data.preferred_tsf;
 307        else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
 308                mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 309                                                NUM_TSF_IDS);
 310}
 311
 312int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 313{
 314        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 315        struct iwl_mvm_mac_iface_iterator_data data = {
 316                .mvm = mvm,
 317                .vif = vif,
 318                .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
 319                .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
 320                /* no preference yet */
 321                .preferred_tsf = NUM_TSF_IDS,
 322                .found_vif = false,
 323        };
 324        u32 ac;
 325        int ret, i, queue_limit;
 326        unsigned long used_hw_queues;
 327
 328        lockdep_assert_held(&mvm->mutex);
 329
 330        /*
 331         * Allocate a MAC ID and a TSF for this MAC, along with the queues
 332         * and other resources.
 333         */
 334
 335        /*
 336         * Before the iterator, we start with all MAC IDs and TSFs available.
 337         *
 338         * During iteration, all MAC IDs are cleared that are in use by other
 339         * virtual interfaces, and all TSF IDs are cleared that can't be used
 340         * by this new virtual interface because they're used by an interface
 341         * that can't share it with the new one.
 342         * At the same time, we check if there's a preferred TSF in the case
 343         * that we should share it with another interface.
 344         */
 345
 346        /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
 347        switch (vif->type) {
 348        case NL80211_IFTYPE_ADHOC:
 349                break;
 350        case NL80211_IFTYPE_STATION:
 351                if (!vif->p2p)
 352                        break;
 353                /* fall through */
 354        default:
 355                __clear_bit(0, data.available_mac_ids);
 356        }
 357
 358        ieee80211_iterate_active_interfaces_atomic(
 359                mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 360                iwl_mvm_mac_iface_iterator, &data);
 361
 362        used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif);
 363
 364        /*
 365         * In the case we're getting here during resume, it's similar to
 366         * firmware restart, and with RESUME_ALL the iterator will find
 367         * the vif being added already.
 368         * We don't want to reassign any IDs in either case since doing
 369         * so would probably assign different IDs (as interfaces aren't
 370         * necessarily added in the same order), but the old IDs were
 371         * preserved anyway, so skip ID assignment for both resume and
 372         * recovery.
 373         */
 374        if (data.found_vif)
 375                return 0;
 376
 377        /* Therefore, in recovery, we can't get here */
 378        if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
 379                return -EBUSY;
 380
 381        mvmvif->id = find_first_bit(data.available_mac_ids,
 382                                    NUM_MAC_INDEX_DRIVER);
 383        if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
 384                IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
 385                ret = -EIO;
 386                goto exit_fail;
 387        }
 388
 389        if (data.preferred_tsf != NUM_TSF_IDS)
 390                mvmvif->tsf_id = data.preferred_tsf;
 391        else
 392                mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
 393                                                NUM_TSF_IDS);
 394        if (mvmvif->tsf_id == NUM_TSF_IDS) {
 395                IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
 396                ret = -EIO;
 397                goto exit_fail;
 398        }
 399
 400        mvmvif->color = 0;
 401
 402        INIT_LIST_HEAD(&mvmvif->time_event_data.list);
 403        mvmvif->time_event_data.id = TE_MAX;
 404
 405        /* No need to allocate data queues to P2P Device MAC.*/
 406        if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 407                for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 408                        vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
 409
 410                return 0;
 411        }
 412
 413        /*
 414         * queues in mac80211 almost entirely independent of
 415         * the ones here - no real limit
 416         */
 417        queue_limit = IEEE80211_MAX_QUEUES;
 418        BUILD_BUG_ON(IEEE80211_MAX_QUEUES >
 419                     BITS_PER_BYTE *
 420                     sizeof(mvm->hw_queue_to_mac80211[0]));
 421
 422        /*
 423         * Find available queues, and allocate them to the ACs. When in
 424         * DQA-mode they aren't really used, and this is done only so the
 425         * mac80211 ieee80211_check_queues() function won't fail
 426         */
 427        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 428                u8 queue = find_first_zero_bit(&used_hw_queues, queue_limit);
 429
 430                if (queue >= queue_limit) {
 431                        IWL_ERR(mvm, "Failed to allocate queue\n");
 432                        ret = -EIO;
 433                        goto exit_fail;
 434                }
 435
 436                __set_bit(queue, &used_hw_queues);
 437                vif->hw_queue[ac] = queue;
 438        }
 439
 440        /* Allocate the CAB queue for softAP and GO interfaces */
 441        if (vif->type == NL80211_IFTYPE_AP ||
 442            vif->type == NL80211_IFTYPE_ADHOC) {
 443                /*
 444                 * For TVQM this will be overwritten later with the FW assigned
 445                 * queue value (when queue is enabled).
 446                 */
 447                mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
 448                vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
 449        } else {
 450                vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 451        }
 452
 453        mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA;
 454        mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA;
 455        mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
 456
 457        for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
 458                mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
 459
 460        return 0;
 461
 462exit_fail:
 463        memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
 464        memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
 465        vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
 466        return ret;
 467}
 468
 469static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
 470                              struct ieee80211_vif *vif,
 471                              enum nl80211_band band,
 472                              u8 *cck_rates, u8 *ofdm_rates)
 473{
 474        struct ieee80211_supported_band *sband;
 475        unsigned long basic = vif->bss_conf.basic_rates;
 476        int lowest_present_ofdm = 100;
 477        int lowest_present_cck = 100;
 478        u8 cck = 0;
 479        u8 ofdm = 0;
 480        int i;
 481
 482        sband = mvm->hw->wiphy->bands[band];
 483
 484        for_each_set_bit(i, &basic, BITS_PER_LONG) {
 485                int hw = sband->bitrates[i].hw_value;
 486                if (hw >= IWL_FIRST_OFDM_RATE) {
 487                        ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
 488                        if (lowest_present_ofdm > hw)
 489                                lowest_present_ofdm = hw;
 490                } else {
 491                        BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 492
 493                        cck |= BIT(hw);
 494                        if (lowest_present_cck > hw)
 495                                lowest_present_cck = hw;
 496                }
 497        }
 498
 499        /*
 500         * Now we've got the basic rates as bitmaps in the ofdm and cck
 501         * variables. This isn't sufficient though, as there might not
 502         * be all the right rates in the bitmap. E.g. if the only basic
 503         * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
 504         * and 6 Mbps because the 802.11-2007 standard says in 9.6:
 505         *
 506         *    [...] a STA responding to a received frame shall transmit
 507         *    its Control Response frame [...] at the highest rate in the
 508         *    BSSBasicRateSet parameter that is less than or equal to the
 509         *    rate of the immediately previous frame in the frame exchange
 510         *    sequence ([...]) and that is of the same modulation class
 511         *    ([...]) as the received frame. If no rate contained in the
 512         *    BSSBasicRateSet parameter meets these conditions, then the
 513         *    control frame sent in response to a received frame shall be
 514         *    transmitted at the highest mandatory rate of the PHY that is
 515         *    less than or equal to the rate of the received frame, and
 516         *    that is of the same modulation class as the received frame.
 517         *
 518         * As a consequence, we need to add all mandatory rates that are
 519         * lower than all of the basic rates to these bitmaps.
 520         */
 521
 522        if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
 523                ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
 524        if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
 525                ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
 526        /* 6M already there or needed so always add */
 527        ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
 528
 529        /*
 530         * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
 531         * Note, however:
 532         *  - if no CCK rates are basic, it must be ERP since there must
 533         *    be some basic rates at all, so they're OFDM => ERP PHY
 534         *    (or we're in 5 GHz, and the cck bitmap will never be used)
 535         *  - if 11M is a basic rate, it must be ERP as well, so add 5.5M
 536         *  - if 5.5M is basic, 1M and 2M are mandatory
 537         *  - if 2M is basic, 1M is mandatory
 538         *  - if 1M is basic, that's the only valid ACK rate.
 539         * As a consequence, it's not as complicated as it sounds, just add
 540         * any lower rates to the ACK rate bitmap.
 541         */
 542        if (IWL_RATE_11M_INDEX < lowest_present_cck)
 543                cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
 544        if (IWL_RATE_5M_INDEX < lowest_present_cck)
 545                cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
 546        if (IWL_RATE_2M_INDEX < lowest_present_cck)
 547                cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
 548        /* 1M already there or needed so always add */
 549        cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
 550
 551        *cck_rates = cck;
 552        *ofdm_rates = ofdm;
 553}
 554
 555static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
 556                                         struct ieee80211_vif *vif,
 557                                         struct iwl_mac_ctx_cmd *cmd)
 558{
 559        /* for both sta and ap, ht_operation_mode hold the protection_mode */
 560        u8 protection_mode = vif->bss_conf.ht_operation_mode &
 561                                 IEEE80211_HT_OP_MODE_PROTECTION;
 562        /* The fw does not distinguish between ht and fat */
 563        u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
 564
 565        IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
 566        /*
 567         * See section 9.23.3.1 of IEEE 80211-2012.
 568         * Nongreenfield HT STAs Present is not supported.
 569         */
 570        switch (protection_mode) {
 571        case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 572                break;
 573        case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 574        case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 575                cmd->protection_flags |= cpu_to_le32(ht_flag);
 576                break;
 577        case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 578                /* Protect when channel wider than 20MHz */
 579                if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
 580                        cmd->protection_flags |= cpu_to_le32(ht_flag);
 581                break;
 582        default:
 583                IWL_ERR(mvm, "Illegal protection mode %d\n",
 584                        protection_mode);
 585                break;
 586        }
 587}
 588
 589static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
 590                                        struct ieee80211_vif *vif,
 591                                        struct iwl_mac_ctx_cmd *cmd,
 592                                        const u8 *bssid_override,
 593                                        u32 action)
 594{
 595        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 596        struct ieee80211_chanctx_conf *chanctx;
 597        bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
 598                             IEEE80211_HT_OP_MODE_PROTECTION);
 599        u8 cck_ack_rates, ofdm_ack_rates;
 600        const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
 601        int i;
 602
 603        cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 604                                                            mvmvif->color));
 605        cmd->action = cpu_to_le32(action);
 606
 607        switch (vif->type) {
 608        case NL80211_IFTYPE_STATION:
 609                if (vif->p2p)
 610                        cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
 611                else
 612                        cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
 613                break;
 614        case NL80211_IFTYPE_AP:
 615                cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
 616                break;
 617        case NL80211_IFTYPE_MONITOR:
 618                cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
 619                break;
 620        case NL80211_IFTYPE_P2P_DEVICE:
 621                cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
 622                break;
 623        case NL80211_IFTYPE_ADHOC:
 624                cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
 625                break;
 626        default:
 627                WARN_ON_ONCE(1);
 628        }
 629
 630        cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
 631
 632        memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
 633
 634        if (bssid)
 635                memcpy(cmd->bssid_addr, bssid, ETH_ALEN);
 636        else
 637                eth_broadcast_addr(cmd->bssid_addr);
 638
 639        rcu_read_lock();
 640        chanctx = rcu_dereference(vif->chanctx_conf);
 641        iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
 642                                            : NL80211_BAND_2GHZ,
 643                          &cck_ack_rates, &ofdm_ack_rates);
 644        rcu_read_unlock();
 645
 646        cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
 647        cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
 648
 649        cmd->cck_short_preamble =
 650                cpu_to_le32(vif->bss_conf.use_short_preamble ?
 651                            MAC_FLG_SHORT_PREAMBLE : 0);
 652        cmd->short_slot =
 653                cpu_to_le32(vif->bss_conf.use_short_slot ?
 654                            MAC_FLG_SHORT_SLOT : 0);
 655
 656        cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
 657
 658        for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 659                u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i);
 660
 661                cmd->ac[txf].cw_min =
 662                        cpu_to_le16(mvmvif->queue_params[i].cw_min);
 663                cmd->ac[txf].cw_max =
 664                        cpu_to_le16(mvmvif->queue_params[i].cw_max);
 665                cmd->ac[txf].edca_txop =
 666                        cpu_to_le16(mvmvif->queue_params[i].txop * 32);
 667                cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
 668                cmd->ac[txf].fifos_mask = BIT(txf);
 669        }
 670
 671        if (vif->bss_conf.qos)
 672                cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
 673
 674        if (vif->bss_conf.use_cts_prot)
 675                cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 676
 677        IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
 678                       vif->bss_conf.use_cts_prot,
 679                       vif->bss_conf.ht_operation_mode);
 680        if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
 681                cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
 682        if (ht_enabled)
 683                iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
 684}
 685
 686static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
 687                                     struct iwl_mac_ctx_cmd *cmd)
 688{
 689        int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
 690                                       sizeof(*cmd), cmd);
 691        if (ret)
 692                IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
 693                        le32_to_cpu(cmd->action), ret);
 694        return ret;
 695}
 696
 697static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
 698                                    struct ieee80211_vif *vif,
 699                                    u32 action, bool force_assoc_off,
 700                                    const u8 *bssid_override)
 701{
 702        struct iwl_mac_ctx_cmd cmd = {};
 703        struct iwl_mac_data_sta *ctxt_sta;
 704
 705        WARN_ON(vif->type != NL80211_IFTYPE_STATION);
 706
 707        /* Fill the common data for all mac context types */
 708        iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
 709
 710        if (vif->p2p) {
 711                struct ieee80211_p2p_noa_attr *noa =
 712                        &vif->bss_conf.p2p_noa_attr;
 713
 714                cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
 715                                        IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
 716                ctxt_sta = &cmd.p2p_sta.sta;
 717        } else {
 718                ctxt_sta = &cmd.sta;
 719        }
 720
 721        /* We need the dtim_period to set the MAC as associated */
 722        if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
 723            !force_assoc_off) {
 724                u32 dtim_offs;
 725
 726                /*
 727                 * The DTIM count counts down, so when it is N that means N
 728                 * more beacon intervals happen until the DTIM TBTT. Therefore
 729                 * add this to the current time. If that ends up being in the
 730                 * future, the firmware will handle it.
 731                 *
 732                 * Also note that the system_timestamp (which we get here as
 733                 * "sync_device_ts") and TSF timestamp aren't at exactly the
 734                 * same offset in the frame -- the TSF is at the first symbol
 735                 * of the TSF, the system timestamp is at signal acquisition
 736                 * time. This means there's an offset between them of at most
 737                 * a few hundred microseconds (24 * 8 bits + PLCP time gives
 738                 * 384us in the longest case), this is currently not relevant
 739                 * as the firmware wakes up around 2ms before the TBTT.
 740                 */
 741                dtim_offs = vif->bss_conf.sync_dtim_count *
 742                                vif->bss_conf.beacon_int;
 743                /* convert TU to usecs */
 744                dtim_offs *= 1024;
 745
 746                ctxt_sta->dtim_tsf =
 747                        cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
 748                ctxt_sta->dtim_time =
 749                        cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
 750                ctxt_sta->assoc_beacon_arrive_time =
 751                        cpu_to_le32(vif->bss_conf.sync_device_ts);
 752
 753                IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
 754                               le64_to_cpu(ctxt_sta->dtim_tsf),
 755                               le32_to_cpu(ctxt_sta->dtim_time),
 756                               dtim_offs);
 757
 758                ctxt_sta->is_assoc = cpu_to_le32(1);
 759        } else {
 760                ctxt_sta->is_assoc = cpu_to_le32(0);
 761
 762                /* Allow beacons to pass through as long as we are not
 763                 * associated, or we do not have dtim period information.
 764                 */
 765                cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
 766        }
 767
 768        ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
 769        ctxt_sta->bi_reciprocal =
 770                cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 771        ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
 772                                              vif->bss_conf.dtim_period);
 773        ctxt_sta->dtim_reciprocal =
 774                cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
 775                                               vif->bss_conf.dtim_period));
 776
 777        ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
 778        ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
 779
 780        if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
 781                cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 782
 783        return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 784}
 785
 786static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
 787                                         struct ieee80211_vif *vif,
 788                                         u32 action)
 789{
 790        struct iwl_mac_ctx_cmd cmd = {};
 791        u32 tfd_queue_msk = BIT(mvm->snif_queue);
 792        int ret;
 793
 794        WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
 795
 796        iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 797
 798        cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
 799                                       MAC_FILTER_IN_CONTROL_AND_MGMT |
 800                                       MAC_FILTER_IN_BEACON |
 801                                       MAC_FILTER_IN_PROBE_REQUEST |
 802                                       MAC_FILTER_IN_CRC32);
 803        ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
 804
 805        /* Allocate sniffer station */
 806        ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk,
 807                                       vif->type, IWL_STA_GENERAL_PURPOSE);
 808        if (ret)
 809                return ret;
 810
 811        return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 812}
 813
 814static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
 815                                     struct ieee80211_vif *vif,
 816                                     u32 action)
 817{
 818        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 819        struct iwl_mac_ctx_cmd cmd = {};
 820
 821        WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
 822
 823        iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 824
 825        cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
 826                                       MAC_FILTER_IN_PROBE_REQUEST);
 827
 828        /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
 829        cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
 830        cmd.ibss.bi_reciprocal =
 831                cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
 832
 833        /* TODO: Assumes that the beacon id == mac context id */
 834        cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
 835
 836        return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 837}
 838
 839struct iwl_mvm_go_iterator_data {
 840        bool go_active;
 841};
 842
 843static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
 844{
 845        struct iwl_mvm_go_iterator_data *data = _data;
 846        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 847
 848        if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 849            mvmvif->ap_ibss_active)
 850                data->go_active = true;
 851}
 852
 853static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
 854                                           struct ieee80211_vif *vif,
 855                                           u32 action)
 856{
 857        struct iwl_mac_ctx_cmd cmd = {};
 858        struct iwl_mvm_go_iterator_data data = {};
 859
 860        WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
 861
 862        iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
 863
 864        cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
 865
 866        /* Override the filter flags to accept only probe requests */
 867        cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
 868
 869        /*
 870         * This flag should be set to true when the P2P Device is
 871         * discoverable and there is at least another active P2P GO. Settings
 872         * this flag will allow the P2P Device to be discoverable on other
 873         * channels in addition to its listen channel.
 874         * Note that this flag should not be set in other cases as it opens the
 875         * Rx filters on all MAC and increases the number of interrupts.
 876         */
 877        ieee80211_iterate_active_interfaces_atomic(
 878                mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 879                iwl_mvm_go_iterator, &data);
 880
 881        cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
 882        return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
 883}
 884
 885static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
 886                                     __le32 *tim_index, __le32 *tim_size,
 887                                     u8 *beacon, u32 frame_size)
 888{
 889        u32 tim_idx;
 890        struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 891
 892        /* The index is relative to frame start but we start looking at the
 893         * variable-length part of the beacon. */
 894        tim_idx = mgmt->u.beacon.variable - beacon;
 895
 896        /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 897        while ((tim_idx < (frame_size - 2)) &&
 898                        (beacon[tim_idx] != WLAN_EID_TIM))
 899                tim_idx += beacon[tim_idx+1] + 2;
 900
 901        /* If TIM field was found, set variables */
 902        if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 903                *tim_index = cpu_to_le32(tim_idx);
 904                *tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]);
 905        } else {
 906                IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
 907        }
 908}
 909
 910static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size)
 911{
 912        struct ieee80211_mgmt *mgmt = (void *)beacon;
 913        const u8 *ie;
 914
 915        if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon)))
 916                return 0;
 917
 918        frame_size -= mgmt->u.beacon.variable - beacon;
 919
 920        ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size);
 921        if (!ie)
 922                return 0;
 923
 924        return ie - beacon;
 925}
 926
 927static u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info,
 928                                           struct ieee80211_vif *vif)
 929{
 930        u8 rate;
 931
 932        if (info->band == NL80211_BAND_5GHZ || vif->p2p)
 933                rate = IWL_FIRST_OFDM_RATE;
 934        else
 935                rate = IWL_FIRST_CCK_RATE;
 936
 937        return rate;
 938}
 939
 940static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm,
 941                                    struct ieee80211_vif *vif,
 942                                    struct sk_buff *beacon,
 943                                    struct iwl_tx_cmd *tx)
 944{
 945        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 946        struct ieee80211_tx_info *info;
 947        u8 rate;
 948        u32 tx_flags;
 949
 950        info = IEEE80211_SKB_CB(beacon);
 951
 952        /* Set up TX command fields */
 953        tx->len = cpu_to_le16((u16)beacon->len);
 954        tx->sta_id = mvmvif->bcast_sta.sta_id;
 955        tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 956        tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
 957        tx_flags |=
 958                iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
 959                                                TX_CMD_FLG_BT_PRIO_POS;
 960        tx->tx_flags = cpu_to_le32(tx_flags);
 961
 962        if (!fw_has_capa(&mvm->fw->ucode_capa,
 963                         IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) {
 964                mvm->mgmt_last_antenna_idx =
 965                        iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 966                                             mvm->mgmt_last_antenna_idx);
 967        }
 968
 969        tx->rate_n_flags =
 970                cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
 971                            RATE_MCS_ANT_POS);
 972
 973        rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
 974
 975        tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
 976        if (rate == IWL_FIRST_CCK_RATE)
 977                tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
 978
 979}
 980
 981static int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm,
 982                                            struct sk_buff *beacon,
 983                                            void *data, int len)
 984{
 985        struct iwl_host_cmd cmd = {
 986                .id = BEACON_TEMPLATE_CMD,
 987                .flags = CMD_ASYNC,
 988        };
 989
 990        cmd.len[0] = len;
 991        cmd.data[0] = data;
 992        cmd.dataflags[0] = 0;
 993        cmd.len[1] = beacon->len;
 994        cmd.data[1] = beacon->data;
 995        cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
 996
 997        return iwl_mvm_send_cmd(mvm, &cmd);
 998}
 999
1000static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm,
1001                                           struct ieee80211_vif *vif,
1002                                           struct sk_buff *beacon)
1003{
1004        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1005        struct iwl_mac_beacon_cmd_v6 beacon_cmd = {};
1006
1007        iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
1008
1009        beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1010
1011        if (vif->type == NL80211_IFTYPE_AP)
1012                iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1013                                         &beacon_cmd.tim_size,
1014                                         beacon->data, beacon->len);
1015
1016        return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1017                                                sizeof(beacon_cmd));
1018}
1019
1020static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm,
1021                                           struct ieee80211_vif *vif,
1022                                           struct sk_buff *beacon)
1023{
1024        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1025        struct iwl_mac_beacon_cmd_v7 beacon_cmd = {};
1026
1027        iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
1028
1029        beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1030
1031        if (vif->type == NL80211_IFTYPE_AP)
1032                iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1033                                         &beacon_cmd.tim_size,
1034                                         beacon->data, beacon->len);
1035
1036        beacon_cmd.csa_offset =
1037                cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1038                                                   WLAN_EID_CHANNEL_SWITCH,
1039                                                   beacon->len));
1040        beacon_cmd.ecsa_offset =
1041                cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1042                                                   WLAN_EID_EXT_CHANSWITCH_ANN,
1043                                                   beacon->len));
1044
1045        return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1046                                                sizeof(beacon_cmd));
1047}
1048
1049static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm,
1050                                           struct ieee80211_vif *vif,
1051                                           struct sk_buff *beacon)
1052{
1053        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1054        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon);
1055        struct iwl_mac_beacon_cmd beacon_cmd = {};
1056        u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
1057        u16 flags;
1058
1059        flags = iwl_mvm_mac80211_idx_to_hwrate(rate);
1060
1061        if (rate == IWL_FIRST_CCK_RATE)
1062                flags |= IWL_MAC_BEACON_CCK;
1063
1064        beacon_cmd.flags = cpu_to_le16(flags);
1065        beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len);
1066        beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
1067
1068        if (vif->type == NL80211_IFTYPE_AP)
1069                iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
1070                                         &beacon_cmd.tim_size,
1071                                         beacon->data, beacon->len);
1072
1073        beacon_cmd.csa_offset =
1074                cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1075                                                   WLAN_EID_CHANNEL_SWITCH,
1076                                                   beacon->len));
1077        beacon_cmd.ecsa_offset =
1078                cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
1079                                                   WLAN_EID_EXT_CHANSWITCH_ANN,
1080                                                   beacon->len));
1081
1082        return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
1083                                                sizeof(beacon_cmd));
1084}
1085
1086static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
1087                                        struct ieee80211_vif *vif,
1088                                        struct sk_buff *beacon)
1089{
1090        if (WARN_ON(!beacon))
1091                return -EINVAL;
1092
1093        if (!fw_has_capa(&mvm->fw->ucode_capa,
1094                         IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD))
1095                return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon);
1096
1097        if (fw_has_api(&mvm->fw->ucode_capa,
1098                       IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE))
1099                return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon);
1100
1101        return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon);
1102}
1103
1104/* The beacon template for the AP/GO/IBSS has changed and needs update */
1105int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
1106                                    struct ieee80211_vif *vif)
1107{
1108        struct sk_buff *beacon;
1109        int ret;
1110
1111        WARN_ON(vif->type != NL80211_IFTYPE_AP &&
1112                vif->type != NL80211_IFTYPE_ADHOC);
1113
1114        beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL);
1115        if (!beacon)
1116                return -ENOMEM;
1117
1118        ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
1119        dev_kfree_skb(beacon);
1120        return ret;
1121}
1122
1123struct iwl_mvm_mac_ap_iterator_data {
1124        struct iwl_mvm *mvm;
1125        struct ieee80211_vif *vif;
1126        u32 beacon_device_ts;
1127        u16 beacon_int;
1128};
1129
1130/* Find the beacon_device_ts and beacon_int for a managed interface */
1131static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
1132                                    struct ieee80211_vif *vif)
1133{
1134        struct iwl_mvm_mac_ap_iterator_data *data = _data;
1135
1136        if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
1137                return;
1138
1139        /* Station client has higher priority over P2P client*/
1140        if (vif->p2p && data->beacon_device_ts)
1141                return;
1142
1143        data->beacon_device_ts = vif->bss_conf.sync_device_ts;
1144        data->beacon_int = vif->bss_conf.beacon_int;
1145}
1146
1147/*
1148 * Fill the specific data for mac context of type AP of P2P GO
1149 */
1150static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
1151                                         struct ieee80211_vif *vif,
1152                                         struct iwl_mac_ctx_cmd *cmd,
1153                                         struct iwl_mac_data_ap *ctxt_ap,
1154                                         bool add)
1155{
1156        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1157        struct iwl_mvm_mac_ap_iterator_data data = {
1158                .mvm = mvm,
1159                .vif = vif,
1160                .beacon_device_ts = 0
1161        };
1162
1163        /* in AP mode, the MCAST FIFO takes the EDCA params from VO */
1164        cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST);
1165
1166        /*
1167         * in AP mode, pass probe requests and beacons from other APs
1168         * (needed for ht protection); when there're no any associated
1169         * station don't ask FW to pass beacons to prevent unnecessary
1170         * wake-ups.
1171         */
1172        cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
1173        if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
1174                cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
1175                IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
1176        } else {
1177                IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
1178        }
1179
1180        ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
1181        ctxt_ap->bi_reciprocal =
1182                cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
1183        ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
1184                                             vif->bss_conf.dtim_period);
1185        ctxt_ap->dtim_reciprocal =
1186                cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
1187                                               vif->bss_conf.dtim_period));
1188
1189        if (!fw_has_api(&mvm->fw->ucode_capa,
1190                        IWL_UCODE_TLV_API_STA_TYPE))
1191                ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
1192
1193        /*
1194         * Only set the beacon time when the MAC is being added, when we
1195         * just modify the MAC then we should keep the time -- the firmware
1196         * can otherwise have a "jumping" TBTT.
1197         */
1198        if (add) {
1199                /*
1200                 * If there is a station/P2P client interface which is
1201                 * associated, set the AP's TBTT far enough from the station's
1202                 * TBTT. Otherwise, set it to the current system time
1203                 */
1204                ieee80211_iterate_active_interfaces_atomic(
1205                        mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1206                        iwl_mvm_mac_ap_iterator, &data);
1207
1208                if (data.beacon_device_ts) {
1209                        u32 rand = (prandom_u32() % (64 - 36)) + 36;
1210                        mvmvif->ap_beacon_time = data.beacon_device_ts +
1211                                ieee80211_tu_to_usec(data.beacon_int * rand /
1212                                                     100);
1213                } else {
1214                        mvmvif->ap_beacon_time =
1215                                iwl_read_prph(mvm->trans,
1216                                              DEVICE_SYSTEM_TIME_REG);
1217                }
1218        }
1219
1220        ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
1221        ctxt_ap->beacon_tsf = 0; /* unused */
1222
1223        /* TODO: Assume that the beacon id == mac context id */
1224        ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
1225}
1226
1227static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
1228                                   struct ieee80211_vif *vif,
1229                                   u32 action)
1230{
1231        struct iwl_mac_ctx_cmd cmd = {};
1232
1233        WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
1234
1235        /* Fill the common data for all mac context types */
1236        iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1237
1238        /* Fill the data specific for ap mode */
1239        iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.ap,
1240                                     action == FW_CTXT_ACTION_ADD);
1241
1242        return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1243}
1244
1245static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
1246                                   struct ieee80211_vif *vif,
1247                                   u32 action)
1248{
1249        struct iwl_mac_ctx_cmd cmd = {};
1250        struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
1251
1252        WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
1253
1254        /* Fill the common data for all mac context types */
1255        iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action);
1256
1257        /* Fill the data specific for GO mode */
1258        iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &cmd.go.ap,
1259                                     action == FW_CTXT_ACTION_ADD);
1260
1261        cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
1262                                        IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
1263        cmd.go.opp_ps_enabled =
1264                        cpu_to_le32(!!(noa->oppps_ctwindow &
1265                                        IEEE80211_P2P_OPPPS_ENABLE_BIT));
1266
1267        return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
1268}
1269
1270static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1271                                u32 action, bool force_assoc_off,
1272                                const u8 *bssid_override)
1273{
1274        switch (vif->type) {
1275        case NL80211_IFTYPE_STATION:
1276                return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
1277                                                force_assoc_off,
1278                                                bssid_override);
1279                break;
1280        case NL80211_IFTYPE_AP:
1281                if (!vif->p2p)
1282                        return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
1283                else
1284                        return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
1285                break;
1286        case NL80211_IFTYPE_MONITOR:
1287                return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
1288        case NL80211_IFTYPE_P2P_DEVICE:
1289                return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
1290        case NL80211_IFTYPE_ADHOC:
1291                return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
1292        default:
1293                break;
1294        }
1295
1296        return -EOPNOTSUPP;
1297}
1298
1299int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1300{
1301        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1302        int ret;
1303
1304        if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
1305                      vif->addr, ieee80211_vif_type_p2p(vif)))
1306                return -EIO;
1307
1308        ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD,
1309                                   true, NULL);
1310        if (ret)
1311                return ret;
1312
1313        /* will only do anything at resume from D3 time */
1314        iwl_mvm_set_last_nonqos_seq(mvm, vif);
1315
1316        mvmvif->uploaded = true;
1317        return 0;
1318}
1319
1320int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1321                             bool force_assoc_off, const u8 *bssid_override)
1322{
1323        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1324
1325        if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
1326                      vif->addr, ieee80211_vif_type_p2p(vif)))
1327                return -EIO;
1328
1329        return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY,
1330                                    force_assoc_off, bssid_override);
1331}
1332
1333int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1334{
1335        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1336        struct iwl_mac_ctx_cmd cmd;
1337        int ret;
1338
1339        if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
1340                      vif->addr, ieee80211_vif_type_p2p(vif)))
1341                return -EIO;
1342
1343        memset(&cmd, 0, sizeof(cmd));
1344
1345        cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
1346                                                           mvmvif->color));
1347        cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
1348
1349        ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, 0,
1350                                   sizeof(cmd), &cmd);
1351        if (ret) {
1352                IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
1353                return ret;
1354        }
1355
1356        mvmvif->uploaded = false;
1357
1358        if (vif->type == NL80211_IFTYPE_MONITOR) {
1359                __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
1360                iwl_mvm_dealloc_snif_sta(mvm);
1361        }
1362
1363        return 0;
1364}
1365
1366static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
1367                                   struct ieee80211_vif *csa_vif, u32 gp2,
1368                                   bool tx_success)
1369{
1370        struct iwl_mvm_vif *mvmvif =
1371                        iwl_mvm_vif_from_mac80211(csa_vif);
1372
1373        /* Don't start to countdown from a failed beacon */
1374        if (!tx_success && !mvmvif->csa_countdown)
1375                return;
1376
1377        mvmvif->csa_countdown = true;
1378
1379        if (!ieee80211_csa_is_complete(csa_vif)) {
1380                int c = ieee80211_csa_update_counter(csa_vif);
1381
1382                iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
1383                if (csa_vif->p2p &&
1384                    !iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
1385                    tx_success) {
1386                        u32 rel_time = (c + 1) *
1387                                       csa_vif->bss_conf.beacon_int -
1388                                       IWL_MVM_CHANNEL_SWITCH_TIME_GO;
1389                        u32 apply_time = gp2 + rel_time * 1024;
1390
1391                        iwl_mvm_schedule_csa_period(mvm, csa_vif,
1392                                         IWL_MVM_CHANNEL_SWITCH_TIME_GO -
1393                                         IWL_MVM_CHANNEL_SWITCH_MARGIN,
1394                                         apply_time);
1395                }
1396        } else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
1397                /* we don't have CSA NoA scheduled yet, switch now */
1398                ieee80211_csa_finish(csa_vif);
1399                RCU_INIT_POINTER(mvm->csa_vif, NULL);
1400        }
1401}
1402
1403void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
1404                             struct iwl_rx_cmd_buffer *rxb)
1405{
1406        struct iwl_rx_packet *pkt = rxb_addr(rxb);
1407        struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
1408        struct iwl_mvm_tx_resp *beacon_notify_hdr;
1409        struct ieee80211_vif *csa_vif;
1410        struct ieee80211_vif *tx_blocked_vif;
1411        struct agg_tx_status *agg_status;
1412        u16 status;
1413
1414        lockdep_assert_held(&mvm->mutex);
1415
1416        beacon_notify_hdr = &beacon->beacon_notify_hdr;
1417        mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
1418        mvm->ibss_manager = beacon->ibss_mgr_status != 0;
1419
1420        agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr);
1421        status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK;
1422        IWL_DEBUG_RX(mvm,
1423                     "beacon status %#x retries:%d tsf:0x%16llX gp2:0x%X rate:%d\n",
1424                     status, beacon_notify_hdr->failure_frame,
1425                     le64_to_cpu(beacon->tsf),
1426                     mvm->ap_last_beacon_gp2,
1427                     le32_to_cpu(beacon_notify_hdr->initial_rate));
1428
1429        csa_vif = rcu_dereference_protected(mvm->csa_vif,
1430                                            lockdep_is_held(&mvm->mutex));
1431        if (unlikely(csa_vif && csa_vif->csa_active))
1432                iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
1433                                       (status == TX_STATUS_SUCCESS));
1434
1435        tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
1436                                                lockdep_is_held(&mvm->mutex));
1437        if (unlikely(tx_blocked_vif)) {
1438                struct iwl_mvm_vif *mvmvif =
1439                        iwl_mvm_vif_from_mac80211(tx_blocked_vif);
1440
1441                /*
1442                 * The channel switch is started and we have blocked the
1443                 * stations. If this is the first beacon (the timeout wasn't
1444                 * set), set the unblock timeout, otherwise countdown
1445                 */
1446                if (!mvm->csa_tx_block_bcn_timeout)
1447                        mvm->csa_tx_block_bcn_timeout =
1448                                IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
1449                else
1450                        mvm->csa_tx_block_bcn_timeout--;
1451
1452                /* Check if the timeout is expired, and unblock tx */
1453                if (mvm->csa_tx_block_bcn_timeout == 0) {
1454                        iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
1455                        RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1456                }
1457        }
1458}
1459
1460static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
1461                                         struct ieee80211_vif *vif)
1462{
1463        struct iwl_missed_beacons_notif *missed_beacons = _data;
1464        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1465        struct iwl_mvm *mvm = mvmvif->mvm;
1466        struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
1467        struct iwl_fw_dbg_trigger_tlv *trigger;
1468        u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
1469        u32 rx_missed_bcon, rx_missed_bcon_since_rx;
1470
1471        if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id))
1472                return;
1473
1474        rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons);
1475        rx_missed_bcon_since_rx =
1476                le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx);
1477        /*
1478         * TODO: the threshold should be adjusted based on latency conditions,
1479         * and/or in case of a CS flow on one of the other AP vifs.
1480         */
1481        if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) >
1482             IWL_MVM_MISSED_BEACONS_THRESHOLD)
1483                ieee80211_beacon_loss(vif);
1484
1485        if (!iwl_fw_dbg_trigger_enabled(mvm->fw,
1486                                        FW_DBG_TRIGGER_MISSED_BEACONS))
1487                return;
1488
1489        trigger = iwl_fw_dbg_get_trigger(mvm->fw,
1490                                         FW_DBG_TRIGGER_MISSED_BEACONS);
1491        bcon_trig = (void *)trigger->data;
1492        stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
1493        stop_trig_missed_bcon_since_rx =
1494                le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
1495
1496        /* TODO: implement start trigger */
1497
1498        if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
1499                                           ieee80211_vif_to_wdev(vif),
1500                                           trigger))
1501                return;
1502
1503        if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
1504            rx_missed_bcon >= stop_trig_missed_bcon)
1505                iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL);
1506}
1507
1508void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
1509                                     struct iwl_rx_cmd_buffer *rxb)
1510{
1511        struct iwl_rx_packet *pkt = rxb_addr(rxb);
1512        struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
1513
1514        IWL_DEBUG_INFO(mvm,
1515                       "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
1516                       le32_to_cpu(mb->mac_id),
1517                       le32_to_cpu(mb->consec_missed_beacons),
1518                       le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
1519                       le32_to_cpu(mb->num_recvd_beacons),
1520                       le32_to_cpu(mb->num_expected_beacons));
1521
1522        ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1523                                                   IEEE80211_IFACE_ITER_NORMAL,
1524                                                   iwl_mvm_beacon_loss_iterator,
1525                                                   mb);
1526}
1527
1528void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
1529                                    struct iwl_rx_cmd_buffer *rxb)
1530{
1531        struct iwl_rx_packet *pkt = rxb_addr(rxb);
1532        struct iwl_stored_beacon_notif *sb = (void *)pkt->data;
1533        struct ieee80211_rx_status rx_status;
1534        struct sk_buff *skb;
1535        u32 size = le32_to_cpu(sb->byte_count);
1536
1537        if (size == 0)
1538                return;
1539
1540        skb = alloc_skb(size, GFP_ATOMIC);
1541        if (!skb) {
1542                IWL_ERR(mvm, "alloc_skb failed\n");
1543                return;
1544        }
1545
1546        /* update rx_status according to the notification's metadata */
1547        memset(&rx_status, 0, sizeof(rx_status));
1548        rx_status.mactime = le64_to_cpu(sb->tsf);
1549        /* TSF as indicated by the firmware  is at INA time */
1550        rx_status.flag |= RX_FLAG_MACTIME_PLCP_START;
1551        rx_status.device_timestamp = le32_to_cpu(sb->system_time);
1552        rx_status.band =
1553                (sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
1554                                NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1555        rx_status.freq =
1556                ieee80211_channel_to_frequency(le16_to_cpu(sb->channel),
1557                                               rx_status.band);
1558
1559        /* copy the data */
1560        skb_put_data(skb, sb->data, size);
1561        memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1562
1563        /* pass it as regular rx to mac80211 */
1564        ieee80211_rx_napi(mvm->hw, NULL, skb, NULL);
1565}
1566
1567void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
1568                                      struct iwl_rx_cmd_buffer *rxb)
1569{
1570        struct iwl_rx_packet *pkt = rxb_addr(rxb);
1571        struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data;
1572        struct ieee80211_vif *csa_vif;
1573        struct iwl_mvm_vif *mvmvif;
1574        int len = iwl_rx_packet_payload_len(pkt);
1575        u32 id_n_color;
1576
1577        if (WARN_ON_ONCE(len < sizeof(*notif)))
1578                return;
1579
1580        rcu_read_lock();
1581
1582        csa_vif = rcu_dereference(mvm->csa_vif);
1583        if (WARN_ON(!csa_vif || !csa_vif->csa_active))
1584                goto out_unlock;
1585
1586        id_n_color = le32_to_cpu(notif->id_and_color);
1587
1588        mvmvif = iwl_mvm_vif_from_mac80211(csa_vif);
1589        if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color,
1590                 "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)",
1591                 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color))
1592                goto out_unlock;
1593
1594        IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n");
1595
1596        schedule_delayed_work(&mvm->cs_tx_unblock_dwork,
1597                              msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT *
1598                                               csa_vif->bss_conf.beacon_int));
1599
1600        ieee80211_csa_finish(csa_vif);
1601
1602        rcu_read_unlock();
1603
1604        RCU_INIT_POINTER(mvm->csa_vif, NULL);
1605
1606        return;
1607
1608out_unlock:
1609        rcu_read_unlock();
1610}
1611