drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 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  *
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  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  * All rights reserved.
  38  *
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  40  * modification, are permitted provided that the following conditions
  41  * are met:
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  43  *  * Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  *  * Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in
  47  *    the documentation and/or other materials provided with the
  48  *    distribution.
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  50  *    contributors may be used to endorse or promote products derived
  51  *    from this software without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  54  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  55  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  56  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  57  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  58  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  59  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  60  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  61  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  62  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  63  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  64  *
  65  *****************************************************************************/
  66 #include <linux/kernel.h>
  67 #include <linux/slab.h>
  68 #include <linux/skbuff.h>
  69 #include <linux/netdevice.h>
  70 #include <linux/etherdevice.h>
  71 #include <linux/ip.h>
  72 #include <linux/if_arp.h>
  73 #include <linux/time.h>
  74 #include <net/mac80211.h>
  75 #include <net/ieee80211_radiotap.h>
  76 #include <net/tcp.h>
  77
  78 #include "iwl-op-mode.h"
  79 #include "iwl-io.h"
  80 #include "mvm.h"
  81 #include "sta.h"
  82 #include "time-event.h"
  83 #include "iwl-eeprom-parse.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88 #include "iwl-nvm-parse.h"
  89 #include "fw-dbg.h"
  90
  91 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  92         {
  93                 .max = 1,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_AP) |
  99                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 100                         BIT(NL80211_IFTYPE_P2P_GO),
 101         },
 102         {
 103                 .max = 1,
 104                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 105         },
 106 };
 107
 108 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 109         {
 110                 .num_different_channels = 2,
 111                 .max_interfaces = 3,
 112                 .limits = iwl_mvm_limits,
 113                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 114         },
 115 };
 116
 117 #ifdef CONFIG_PM_SLEEP
 118 static const struct nl80211_wowlan_tcp_data_token_feature
 119 iwl_mvm_wowlan_tcp_token_feature = {
 120         .min_len = 0,
 121         .max_len = 255,
 122         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 123 };
 124
 125 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 126         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 127         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 128                             sizeof(struct ethhdr) -
 129                             sizeof(struct iphdr) -
 130                             sizeof(struct tcphdr),
 131         .data_interval_max = 65535, /* __le16 in API */
 132         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 133                             sizeof(struct ethhdr) -
 134                             sizeof(struct iphdr) -
 135                             sizeof(struct tcphdr),
 136         .seq = true,
 137 };
 138 #endif
 139
 140 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 141 /*
 142  * Use the reserved field to indicate magic values.
 143  * these values will only be used internally by the driver,
 144  * and won't make it to the fw (reserved will be 0).
 145  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 146  *      be the vif's ip address. in case there is not a single
 147  *      ip address (0, or more than 1), this attribute will
 148  *      be skipped.
 149  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 150  *      the LSB bytes of the vif's mac address
 151  */
 152 enum {
 153         BC_FILTER_MAGIC_NONE = 0,
 154         BC_FILTER_MAGIC_IP,
 155         BC_FILTER_MAGIC_MAC,
 156 };
 157
 158 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 159         {
 160                 /* arp */
 161                 .discard = 0,
 162                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 163                 .attrs = {
 164                         {
 165                                 /* frame type - arp, hw type - ethernet */
 166                                 .offset_type =
 167                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 168                                 .offset = sizeof(rfc1042_header),
 169                                 .val = cpu_to_be32(0x08060001),
 170                                 .mask = cpu_to_be32(0xffffffff),
 171                         },
 172                         {
 173                                 /* arp dest ip */
 174                                 .offset_type =
 175                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 176                                 .offset = sizeof(rfc1042_header) + 2 +
 177                                           sizeof(struct arphdr) +
 178                                           ETH_ALEN + sizeof(__be32) +
 179                                           ETH_ALEN,
 180                                 .mask = cpu_to_be32(0xffffffff),
 181                                 /* mark it as special field */
 182                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 183                         },
 184                 },
 185         },
 186         {
 187                 /* dhcp offer bcast */
 188                 .discard = 0,
 189                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 190                 .attrs = {
 191                         {
 192                                 /* udp dest port - 68 (bootp client)*/
 193                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 194                                 .offset = offsetof(struct udphdr, dest),
 195                                 .val = cpu_to_be32(0x00440000),
 196                                 .mask = cpu_to_be32(0xffff0000),
 197                         },
 198                         {
 199                                 /* dhcp - lsb bytes of client hw address */
 200                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 201                                 .offset = 38,
 202                                 .mask = cpu_to_be32(0xffffffff),
 203                                 /* mark it as special field */
 204                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 205                         },
 206                 },
 207         },
 208         /* last filter must be empty */
 209         {},
 210 };
 211 #endif
 212
 213 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 214 {
 215         if (!iwl_mvm_is_d0i3_supported(mvm))
 216                 return;
 217
 218         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 219         spin_lock_bh(&mvm->refs_lock);
 220         mvm->refs[ref_type]++;
 221         spin_unlock_bh(&mvm->refs_lock);
 222         iwl_trans_ref(mvm->trans);
 223 }
 224
 225 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 226 {
 227         if (!iwl_mvm_is_d0i3_supported(mvm))
 228                 return;
 229
 230         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 231         spin_lock_bh(&mvm->refs_lock);
 232         if (WARN_ON(!mvm->refs[ref_type])) {
 233                 spin_unlock_bh(&mvm->refs_lock);
 234                 return;
 235         }
 236         mvm->refs[ref_type]--;
 237         spin_unlock_bh(&mvm->refs_lock);
 238         iwl_trans_unref(mvm->trans);
 239 }
 240
 241 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 242                                      enum iwl_mvm_ref_type except_ref)
 243 {
 244         int i, j;
 245
 246         if (!iwl_mvm_is_d0i3_supported(mvm))
 247                 return;
 248
 249         spin_lock_bh(&mvm->refs_lock);
 250         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 251                 if (except_ref == i || !mvm->refs[i])
 252                         continue;
 253
 254                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 255                               i, mvm->refs[i]);
 256                 for (j = 0; j < mvm->refs[i]; j++)
 257                         iwl_trans_unref(mvm->trans);
 258                 mvm->refs[i] = 0;
 259         }
 260         spin_unlock_bh(&mvm->refs_lock);
 261 }
 262
 263 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 264 {
 265         int i;
 266         bool taken = false;
 267
 268         if (!iwl_mvm_is_d0i3_supported(mvm))
 269                 return true;
 270
 271         spin_lock_bh(&mvm->refs_lock);
 272         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 273                 if (mvm->refs[i]) {
 274                         taken = true;
 275                         break;
 276                 }
 277         }
 278         spin_unlock_bh(&mvm->refs_lock);
 279
 280         return taken;
 281 }
 282
 283 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 284 {
 285         iwl_mvm_ref(mvm, ref_type);
 286
 287         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 288                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 289                                 HZ)) {
 290                 WARN_ON_ONCE(1);
 291                 iwl_mvm_unref(mvm, ref_type);
 292                 return -EIO;
 293         }
 294
 295         return 0;
 296 }
 297
 298 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 299 {
 300         int i;
 301
 302         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 303         for (i = 0; i < NUM_PHY_CTX; i++) {
 304                 mvm->phy_ctxts[i].id = i;
 305                 mvm->phy_ctxts[i].ref = 0;
 306         }
 307 }
 308
 309 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 310                                                   const char *alpha2,
 311                                                   enum iwl_mcc_source src_id,
 312                                                   bool *changed)
 313 {
 314         struct ieee80211_regdomain *regd = NULL;
 315         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 316         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 317         struct iwl_mcc_update_resp *resp;
 318
 319         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 320
 321         lockdep_assert_held(&mvm->mutex);
 322
 323         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 324         if (IS_ERR_OR_NULL(resp)) {
 325                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 326                               PTR_ERR_OR_ZERO(resp));
 327                 goto out;
 328         }
 329
 330         if (changed)
 331                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 332
 333         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 334                                       __le32_to_cpu(resp->n_channels),
 335                                       resp->channels,
 336                                       __le16_to_cpu(resp->mcc));
 337         /* Store the return source id */
 338         src_id = resp->source_id;
 339         kfree(resp);
 340         if (IS_ERR_OR_NULL(regd)) {
 341                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 342                               PTR_ERR_OR_ZERO(regd));
 343                 goto out;
 344         }
 345
 346         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 347                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 348         mvm->lar_regdom_set = true;
 349         mvm->mcc_src = src_id;
 350
 351 out:
 352         return regd;
 353 }
 354
 355 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 356 {
 357         bool changed;
 358         struct ieee80211_regdomain *regd;
 359
 360         if (!iwl_mvm_is_lar_supported(mvm))
 361                 return;
 362
 363         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 364         if (!IS_ERR_OR_NULL(regd)) {
 365                 /* only update the regulatory core if changed */
 366                 if (changed)
 367                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 368
 369                 kfree(regd);
 370         }
 371 }
 372
 373 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 374                                                           bool *changed)
 375 {
 376         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 377                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 378                                      MCC_SOURCE_GET_CURRENT :
 379                                      MCC_SOURCE_OLD_FW, changed);
 380 }
 381
 382 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 383 {
 384         enum iwl_mcc_source used_src;
 385         struct ieee80211_regdomain *regd;
 386         int ret;
 387         bool changed;
 388         const struct ieee80211_regdomain *r =
 389                         rtnl_dereference(mvm->hw->wiphy->regd);
 390
 391         if (!r)
 392                 return -ENOENT;
 393
 394         /* save the last source in case we overwrite it below */
 395         used_src = mvm->mcc_src;
 396         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 397                 /* Notify the firmware we support wifi location updates */
 398                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 399                 if (!IS_ERR_OR_NULL(regd))
 400                         kfree(regd);
 401         }
 402
 403         /* Now set our last stored MCC and source */
 404         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 405                                      &changed);
 406         if (IS_ERR_OR_NULL(regd))
 407                 return -EIO;
 408
 409         /* update cfg80211 if the regdomain was changed */
 410         if (changed)
 411                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 412         else
 413                 ret = 0;
 414
 415         kfree(regd);
 416         return ret;
 417 }
 418
 419 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 420 {
 421         struct ieee80211_hw *hw = mvm->hw;
 422         int num_mac, ret, i;
 423         static const u32 mvm_ciphers[] = {
 424                 WLAN_CIPHER_SUITE_WEP40,
 425                 WLAN_CIPHER_SUITE_WEP104,
 426                 WLAN_CIPHER_SUITE_TKIP,
 427                 WLAN_CIPHER_SUITE_CCMP,
 428         };
 429
 430         /* Tell mac80211 our characteristics */
 431         ieee80211_hw_set(hw, SIGNAL_DBM);
 432         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 433         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 434         ieee80211_hw_set(hw, QUEUE_CONTROL);
 435         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 436         ieee80211_hw_set(hw, SUPPORTS_PS);
 437         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 438         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 439         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 440         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 441         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 442         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 443         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 444         ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 445         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
 446         if (iwl_mvm_has_new_rx_api(mvm))
 447                 ieee80211_hw_set(hw, SUPPORTS_REORDERING_BUFFER);
 448         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_STA_PM_NOTIF))
 449                 ieee80211_hw_set(hw, AP_LINK_PS);
 450
 451         if (mvm->trans->num_rx_queues > 1)
 452                 ieee80211_hw_set(hw, USES_RSS);
 453
 454         if (mvm->trans->max_skb_frags)
 455                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 456
 457         if (!iwl_mvm_is_dqa_supported(mvm))
 458                 hw->queues = mvm->first_agg_queue;
 459         else
 460                 hw->queues = IEEE80211_MAX_QUEUES;
 461         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 462         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 463                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 464         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 465                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 466
 467         hw->radiotap_timestamp.units_pos =
 468                 IEEE80211_RADIOTAP_TIMESTAMP_UNIT_US |
 469                 IEEE80211_RADIOTAP_TIMESTAMP_SPOS_PLCP_SIG_ACQ;
 470         /* this is the case for CCK frames, it's better (only 8) for OFDM */
 471         hw->radiotap_timestamp.accuracy = 22;
 472
 473         hw->rate_control_algorithm = "iwl-mvm-rs";
 474         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 475         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 476
 477         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 6);
 478         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 479         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 480         hw->wiphy->cipher_suites = mvm->ciphers;
 481
 482         if (iwl_mvm_has_new_rx_api(mvm)) {
 483                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 484                         WLAN_CIPHER_SUITE_GCMP;
 485                 hw->wiphy->n_cipher_suites++;
 486                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 487                         WLAN_CIPHER_SUITE_GCMP_256;
 488                 hw->wiphy->n_cipher_suites++;
 489         }
 490
 491         /* Enable 11w if software crypto is not enabled (as the
 492          * firmware will interpret some mgmt packets, so enabling it
 493          * with software crypto isn't safe).
 494          */
 495         if (!iwlwifi_mod_params.sw_crypto) {
 496                 ieee80211_hw_set(hw, MFP_CAPABLE);
 497                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 498                         WLAN_CIPHER_SUITE_AES_CMAC;
 499                 hw->wiphy->n_cipher_suites++;
 500                 if (iwl_mvm_has_new_rx_api(mvm)) {
 501                         mvm->ciphers[hw->wiphy->n_cipher_suites] =
 502                                 WLAN_CIPHER_SUITE_BIP_GMAC_128;
 503                         hw->wiphy->n_cipher_suites++;
 504                         mvm->ciphers[hw->wiphy->n_cipher_suites] =
 505                                 WLAN_CIPHER_SUITE_BIP_GMAC_256;
 506                         hw->wiphy->n_cipher_suites++;
 507                 }
 508         }
 509
 510         /* currently FW API supports only one optional cipher scheme */
 511         if (mvm->fw->cs[0].cipher) {
 512                 const struct iwl_fw_cipher_scheme *fwcs = &mvm->fw->cs[0];
 513                 struct ieee80211_cipher_scheme *cs = &mvm->cs[0];
 514
 515                 mvm->hw->n_cipher_schemes = 1;
 516
 517                 cs->cipher = le32_to_cpu(fwcs->cipher);
 518                 cs->iftype = BIT(NL80211_IFTYPE_STATION);
 519                 cs->hdr_len = fwcs->hdr_len;
 520                 cs->pn_len = fwcs->pn_len;
 521                 cs->pn_off = fwcs->pn_off;
 522                 cs->key_idx_off = fwcs->key_idx_off;
 523                 cs->key_idx_mask = fwcs->key_idx_mask;
 524                 cs->key_idx_shift = fwcs->key_idx_shift;
 525                 cs->mic_len = fwcs->mic_len;
 526
 527                 mvm->hw->cipher_schemes = mvm->cs;
 528                 mvm->ciphers[hw->wiphy->n_cipher_suites] = cs->cipher;
 529                 hw->wiphy->n_cipher_suites++;
 530         }
 531
 532         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 533         hw->wiphy->features |=
 534                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 535                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 536                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 537
 538         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 539         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 540         hw->chanctx_data_size = sizeof(u16);
 541
 542         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 543                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 544                 BIT(NL80211_IFTYPE_AP) |
 545                 BIT(NL80211_IFTYPE_P2P_GO) |
 546                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 547                 BIT(NL80211_IFTYPE_ADHOC);
 548
 549         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 550         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 551         if (iwl_mvm_is_lar_supported(mvm))
 552                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 553         else
 554                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 555                                                REGULATORY_DISABLE_BEACON_HINTS;
 556
 557         hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 558         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 559
 560         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 561         hw->wiphy->n_iface_combinations =
 562                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 563
 564         hw->wiphy->max_remain_on_channel_duration = 10000;
 565         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 566         /* we can compensate an offset of up to 3 channels = 15 MHz */
 567         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 568
 569         /* Extract MAC address */
 570         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 571         hw->wiphy->addresses = mvm->addresses;
 572         hw->wiphy->n_addresses = 1;
 573
 574         /* Extract additional MAC addresses if available */
 575         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 576                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 577
 578         for (i = 1; i < num_mac; i++) {
 579                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 580                        ETH_ALEN);
 581                 mvm->addresses[i].addr[5]++;
 582                 hw->wiphy->n_addresses++;
 583         }
 584
 585         iwl_mvm_reset_phy_ctxts(mvm);
 586
 587         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 588
 589         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 590
 591         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 592         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 593                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 594
 595         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 596                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 597         else
 598                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 599
 600         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 601                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 602                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 603         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 604                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 605                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 606
 607                 if (fw_has_capa(&mvm->fw->ucode_capa,
 608                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 609                     fw_has_api(&mvm->fw->ucode_capa,
 610                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 611                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 612                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 613         }
 614
 615         hw->wiphy->hw_version = mvm->trans->hw_id;
 616
 617         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 618                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 619         else
 620                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 621
 622         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 623         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 624         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 625         /* we create the 802.11 header and zero length SSID IE. */
 626         hw->wiphy->max_sched_scan_ie_len =
 627                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 628         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 629         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 630
 631         /*
 632          * the firmware uses u8 for num of iterations, but 0xff is saved for
 633          * infinite loop, so the maximum number of iterations is actually 254.
 634          */
 635         hw->wiphy->max_sched_scan_plan_iterations = 254;
 636
 637         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 638                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 639                                NL80211_FEATURE_P2P_GO_OPPPS |
 640                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
 641                                NL80211_FEATURE_DYNAMIC_SMPS |
 642                                NL80211_FEATURE_STATIC_SMPS |
 643                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 644
 645         if (fw_has_capa(&mvm->fw->ucode_capa,
 646                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 647                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 648         if (fw_has_capa(&mvm->fw->ucode_capa,
 649                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 650                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 651
 652         if (fw_has_capa(&mvm->fw->ucode_capa,
 653                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 654                 hw->wiphy->features |=
 655                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 656
 657         if (fw_has_capa(&mvm->fw->ucode_capa,
 658                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 659                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 660
 661         if (fw_has_api(&mvm->fw->ucode_capa,
 662                        IWL_UCODE_TLV_API_SCAN_TSF_REPORT)) {
 663                 wiphy_ext_feature_set(hw->wiphy,
 664                                       NL80211_EXT_FEATURE_SCAN_START_TIME);
 665                 wiphy_ext_feature_set(hw->wiphy,
 666                                       NL80211_EXT_FEATURE_BSS_PARENT_TSF);
 667                 wiphy_ext_feature_set(hw->wiphy,
 668                                       NL80211_EXT_FEATURE_SET_SCAN_DWELL);
 669         }
 670
 671         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 672
 673 #ifdef CONFIG_PM_SLEEP
 674         if (iwl_mvm_is_d0i3_supported(mvm) &&
 675             device_can_wakeup(mvm->trans->dev)) {
 676                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 677                 hw->wiphy->wowlan = &mvm->wowlan;
 678         }
 679
 680         if (mvm->fw->img[IWL_UCODE_WOWLAN].num_sec &&
 681             mvm->trans->ops->d3_suspend &&
 682             mvm->trans->ops->d3_resume &&
 683             device_can_wakeup(mvm->trans->dev)) {
 684                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 685                                      WIPHY_WOWLAN_DISCONNECT |
 686                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 687                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 688                                      WIPHY_WOWLAN_NET_DETECT;
 689                 if (!iwlwifi_mod_params.sw_crypto)
 690                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 691                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 692                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 693
 694                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 695                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 696                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 697                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 698                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 699                 hw->wiphy->wowlan = &mvm->wowlan;
 700         }
 701 #endif
 702
 703 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 704         /* assign default bcast filtering configuration */
 705         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 706 #endif
 707
 708         ret = iwl_mvm_leds_init(mvm);
 709         if (ret)
 710                 return ret;
 711
 712         if (fw_has_capa(&mvm->fw->ucode_capa,
 713                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 714                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 715                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 716                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 717         }
 718
 719         if (fw_has_capa(&mvm->fw->ucode_capa,
 720                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 721                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 722                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 723         }
 724
 725         hw->netdev_features |= mvm->cfg->features;
 726         if (!iwl_mvm_is_csum_supported(mvm)) {
 727                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 728                                          NETIF_F_RXCSUM);
 729                 /* We may support SW TX CSUM */
 730                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 731                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 732         }
 733
 734         ret = ieee80211_register_hw(mvm->hw);
 735         if (ret)
 736                 iwl_mvm_leds_exit(mvm);
 737
 738         if (mvm->cfg->vht_mu_mimo_supported)
 739                 wiphy_ext_feature_set(hw->wiphy,
 740                                       NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER);
 741
 742         return ret;
 743 }
 744
 745 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 746                              struct ieee80211_sta *sta,
 747                              struct sk_buff *skb)
 748 {
 749         struct iwl_mvm_sta *mvmsta;
 750         bool defer = false;
 751
 752         /*
 753          * double check the IN_D0I3 flag both before and after
 754          * taking the spinlock, in order to prevent taking
 755          * the spinlock when not needed.
 756          */
 757         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 758                 return false;
 759
 760         spin_lock(&mvm->d0i3_tx_lock);
 761         /*
 762          * testing the flag again ensures the skb dequeue
 763          * loop (on d0i3 exit) hasn't run yet.
 764          */
 765         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 766                 goto out;
 767
 768         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 769         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 770             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 771                 goto out;
 772
 773         __skb_queue_tail(&mvm->d0i3_tx, skb);
 774         ieee80211_stop_queues(mvm->hw);
 775
 776         /* trigger wakeup */
 777         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 778         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 779
 780         defer = true;
 781 out:
 782         spin_unlock(&mvm->d0i3_tx_lock);
 783         return defer;
 784 }
 785
 786 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 787                            struct ieee80211_tx_control *control,
 788                            struct sk_buff *skb)
 789 {
 790         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 791         struct ieee80211_sta *sta = control->sta;
 792         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 793         struct ieee80211_hdr *hdr = (void *)skb->data;
 794
 795         if (iwl_mvm_is_radio_killed(mvm)) {
 796                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 797                 goto drop;
 798         }
 799
 800         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 801             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 802             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 803                 goto drop;
 804
 805         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 806         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 807                      ieee80211_is_mgmt(hdr->frame_control) &&
 808                      !ieee80211_is_deauth(hdr->frame_control) &&
 809                      !ieee80211_is_disassoc(hdr->frame_control) &&
 810                      !ieee80211_is_action(hdr->frame_control)))
 811                 sta = NULL;
 812
 813         if (sta) {
 814                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 815                         return;
 816                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 817                         goto drop;
 818                 return;
 819         }
 820
 821         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 822                 goto drop;
 823         return;
 824  drop:
 825         ieee80211_free_txskb(hw, skb);
 826 }
 827
 828 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 829 {
 830         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 831                 return false;
 832         return true;
 833 }
 834
 835 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 836 {
 837         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 838                 return false;
 839         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 840                 return true;
 841
 842         /* enabled by default */
 843         return true;
 844 }
 845
 846 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 847         do {                                                    \
 848                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 849                         break;                                  \
 850                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 851         } while (0)
 852
 853 static void
 854 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 855                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 856                             enum ieee80211_ampdu_mlme_action action)
 857 {
 858         struct iwl_fw_dbg_trigger_tlv *trig;
 859         struct iwl_fw_dbg_trigger_ba *ba_trig;
 860
 861         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 862                 return;
 863
 864         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 865         ba_trig = (void *)trig->data;
 866
 867         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 868                 return;
 869
 870         switch (action) {
 871         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 872                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 873                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 874
 875                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 876                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 877                                  sta->addr, tid, tid_data->ssn);
 878                 break;
 879                 }
 880         case IEEE80211_AMPDU_TX_STOP_CONT:
 881                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 882                                  "TX AGG STOP: MAC %pM tid %d\n",
 883                                  sta->addr, tid);
 884                 break;
 885         case IEEE80211_AMPDU_RX_START:
 886                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 887                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 888                                  sta->addr, tid, rx_ba_ssn);
 889                 break;
 890         case IEEE80211_AMPDU_RX_STOP:
 891                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 892                                  "RX AGG STOP: MAC %pM tid %d\n",
 893                                  sta->addr, tid);
 894                 break;
 895         default:
 896                 break;
 897         }
 898 }
 899
 900 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 901                                     struct ieee80211_vif *vif,
 902                                     struct ieee80211_ampdu_params *params)
 903 {
 904         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 905         int ret;
 906         bool tx_agg_ref = false;
 907         struct ieee80211_sta *sta = params->sta;
 908         enum ieee80211_ampdu_mlme_action action = params->action;
 909         u16 tid = params->tid;
 910         u16 *ssn = &params->ssn;
 911         u8 buf_size = params->buf_size;
 912         bool amsdu = params->amsdu;
 913         u16 timeout = params->timeout;
 914
 915         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 916                      sta->addr, tid, action);
 917
 918         if (!(mvm->nvm_data->sku_cap_11n_enable))
 919                 return -EACCES;
 920
 921         /* return from D0i3 before starting a new Tx aggregation */
 922         switch (action) {
 923         case IEEE80211_AMPDU_TX_START:
 924         case IEEE80211_AMPDU_TX_STOP_CONT:
 925         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 926         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 927         case IEEE80211_AMPDU_TX_OPERATIONAL:
 928                 /*
 929                  * for tx start, wait synchronously until D0i3 exit to
 930                  * get the correct sequence number for the tid.
 931                  * additionally, some other ampdu actions use direct
 932                  * target access, which is not handled automatically
 933                  * by the trans layer (unlike commands), so wait for
 934                  * d0i3 exit in these cases as well.
 935                  */
 936                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 937                 if (ret)
 938                         return ret;
 939
 940                 tx_agg_ref = true;
 941                 break;
 942         default:
 943                 break;
 944         }
 945
 946         mutex_lock(&mvm->mutex);
 947
 948         switch (action) {
 949         case IEEE80211_AMPDU_RX_START:
 950                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 951                         ret = -EINVAL;
 952                         break;
 953                 }
 954                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 955                                          timeout);
 956                 break;
 957         case IEEE80211_AMPDU_RX_STOP:
 958                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 959                                          timeout);
 960                 break;
 961         case IEEE80211_AMPDU_TX_START:
 962                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 963                         ret = -EINVAL;
 964                         break;
 965                 }
 966                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 967                 break;
 968         case IEEE80211_AMPDU_TX_STOP_CONT:
 969                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 970                 break;
 971         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 972         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 973                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 974                 break;
 975         case IEEE80211_AMPDU_TX_OPERATIONAL:
 976                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 977                                               buf_size, amsdu);
 978                 break;
 979         default:
 980                 WARN_ON_ONCE(1);
 981                 ret = -EINVAL;
 982                 break;
 983         }
 984
 985         if (!ret) {
 986                 u16 rx_ba_ssn = 0;
 987
 988                 if (action == IEEE80211_AMPDU_RX_START)
 989                         rx_ba_ssn = *ssn;
 990
 991                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 992                                             rx_ba_ssn, action);
 993         }
 994         mutex_unlock(&mvm->mutex);
 995
 996         /*
 997          * If the tid is marked as started, we won't use it for offloaded
 998          * traffic on the next D0i3 entry. It's safe to unref.
 999          */
1000         if (tx_agg_ref)
1001                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
1002
1003         return ret;
1004 }
1005
1006 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
1007                                      struct ieee80211_vif *vif)
1008 {
1009         struct iwl_mvm *mvm = data;
1010         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1011
1012         mvmvif->uploaded = false;
1013         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1014
1015         spin_lock_bh(&mvm->time_event_lock);
1016         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
1017         spin_unlock_bh(&mvm->time_event_lock);
1018
1019         mvmvif->phy_ctxt = NULL;
1020         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
1021 }
1022
1023 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1024 {
1025         /* clear the D3 reconfig, we only need it to avoid dumping a
1026          * firmware coredump on reconfiguration, we shouldn't do that
1027          * on D3->D0 transition
1028          */
1029         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1030                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1031                 iwl_mvm_fw_error_dump(mvm);
1032         }
1033
1034         /* cleanup all stale references (scan, roc), but keep the
1035          * ucode_down ref until reconfig is complete
1036          */
1037         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1038
1039         iwl_mvm_stop_device(mvm);
1040
1041         mvm->scan_status = 0;
1042         mvm->ps_disabled = false;
1043         mvm->calibrating = false;
1044
1045         /* just in case one was running */
1046         iwl_mvm_cleanup_roc_te(mvm);
1047         ieee80211_remain_on_channel_expired(mvm->hw);
1048
1049         /*
1050          * cleanup all interfaces, even inactive ones, as some might have
1051          * gone down during the HW restart
1052          */
1053         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1054
1055         mvm->p2p_device_vif = NULL;
1056         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1057
1058         iwl_mvm_reset_phy_ctxts(mvm);
1059         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1060         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1061         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1062         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1063         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1064         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1065
1066         ieee80211_wake_queues(mvm->hw);
1067
1068         /* clear any stale d0i3 state */
1069         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1070
1071         mvm->vif_count = 0;
1072         mvm->rx_ba_sessions = 0;
1073         mvm->fw_dbg_conf = FW_DBG_INVALID;
1074
1075         /* keep statistics ticking */
1076         iwl_mvm_accu_radio_stats(mvm);
1077 }
1078
1079 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1080 {
1081         int ret;
1082
1083         lockdep_assert_held(&mvm->mutex);
1084
1085         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1086                 /* Clean up some internal and mac80211 state on restart */
1087                 iwl_mvm_restart_cleanup(mvm);
1088         } else {
1089                 /* Hold the reference to prevent runtime suspend while
1090                  * the start procedure runs.  It's a bit confusing
1091                  * that the UCODE_DOWN reference is taken, but it just
1092                  * means "UCODE is not UP yet". ( TODO: rename this
1093                  * reference).
1094                  */
1095                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1096         }
1097         ret = iwl_mvm_up(mvm);
1098
1099         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1100                 /* Something went wrong - we need to finish some cleanup
1101                  * that normally iwl_mvm_mac_restart_complete() below
1102                  * would do.
1103                  */
1104                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1105                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1106         }
1107
1108         return ret;
1109 }
1110
1111 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1112 {
1113         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1114         int ret;
1115
1116         /* Some hw restart cleanups must not hold the mutex */
1117         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1118                 /*
1119                  * Make sure we are out of d0i3. This is needed
1120                  * to make sure the reference accounting is correct
1121                  * (and there is no stale d0i3_exit_work).
1122                  */
1123                 wait_event_timeout(mvm->d0i3_exit_waitq,
1124                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1125                                              &mvm->status),
1126                                    HZ);
1127         }
1128
1129         mutex_lock(&mvm->mutex);
1130         ret = __iwl_mvm_mac_start(mvm);
1131         mutex_unlock(&mvm->mutex);
1132
1133         return ret;
1134 }
1135
1136 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1137 {
1138         int ret;
1139
1140         mutex_lock(&mvm->mutex);
1141
1142         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1143         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1144         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1145         if (ret)
1146                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1147                         ret);
1148
1149         /* allow transport/FW low power modes */
1150         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1151
1152         /*
1153          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1154          * of packets the FW sent out, so we must reconnect.
1155          */
1156         iwl_mvm_teardown_tdls_peers(mvm);
1157
1158         mutex_unlock(&mvm->mutex);
1159 }
1160
1161 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1162 {
1163         if (iwl_mvm_is_d0i3_supported(mvm) &&
1164             iwl_mvm_enter_d0i3_on_suspend(mvm))
1165                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1166                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1167                                                         &mvm->status),
1168                                               HZ),
1169                           "D0i3 exit on resume timed out\n");
1170 }
1171
1172 static void
1173 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1174                               enum ieee80211_reconfig_type reconfig_type)
1175 {
1176         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1177
1178         switch (reconfig_type) {
1179         case IEEE80211_RECONFIG_TYPE_RESTART:
1180                 iwl_mvm_restart_complete(mvm);
1181                 break;
1182         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1183                 iwl_mvm_resume_complete(mvm);
1184                 break;
1185         }
1186 }
1187
1188 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1189 {
1190         lockdep_assert_held(&mvm->mutex);
1191
1192         /* firmware counters are obviously reset now, but we shouldn't
1193          * partially track so also clear the fw_reset_accu counters.
1194          */
1195         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1196
1197         /* async_handlers_wk is now blocked */
1198
1199         /*
1200          * The work item could be running or queued if the
1201          * ROC time event stops just as we get here.
1202          */
1203         flush_work(&mvm->roc_done_wk);
1204
1205         iwl_mvm_stop_device(mvm);
1206
1207         iwl_mvm_async_handlers_purge(mvm);
1208         /* async_handlers_list is empty and will stay empty: HW is stopped */
1209
1210         /* the fw is stopped, the aux sta is dead: clean up driver state */
1211         iwl_mvm_del_aux_sta(mvm);
1212
1213         /*
1214          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1215          * won't be called in this case).
1216          * But make sure to cleanup interfaces that have gone down before/during
1217          * HW restart was requested.
1218          */
1219         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1220                 ieee80211_iterate_interfaces(mvm->hw, 0,
1221                                              iwl_mvm_cleanup_iterator, mvm);
1222
1223         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1224          * make sure there's nothing left there and warn if any is found.
1225          */
1226         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1227                 int i;
1228
1229                 for (i = 0; i < mvm->max_scans; i++) {
1230                         if (WARN_ONCE(mvm->scan_uid_status[i],
1231                                       "UMAC scan UID %d status was not cleaned\n",
1232                                       i))
1233                                 mvm->scan_uid_status[i] = 0;
1234                 }
1235         }
1236 }
1237
1238 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1239 {
1240         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1241
1242         flush_work(&mvm->d0i3_exit_work);
1243         flush_work(&mvm->async_handlers_wk);
1244         flush_work(&mvm->add_stream_wk);
1245         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1246         cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork);
1247         cancel_delayed_work_sync(&mvm->scan_timeout_dwork);
1248         iwl_mvm_free_fw_dump_desc(mvm);
1249
1250         mutex_lock(&mvm->mutex);
1251         __iwl_mvm_mac_stop(mvm);
1252         mutex_unlock(&mvm->mutex);
1253
1254         /*
1255          * The worker might have been waiting for the mutex, let it run and
1256          * discover that its list is now empty.
1257          */
1258         cancel_work_sync(&mvm->async_handlers_wk);
1259 }
1260
1261 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1262 {
1263         u16 i;
1264
1265         lockdep_assert_held(&mvm->mutex);
1266
1267         for (i = 0; i < NUM_PHY_CTX; i++)
1268                 if (!mvm->phy_ctxts[i].ref)
1269                         return &mvm->phy_ctxts[i];
1270
1271         IWL_ERR(mvm, "No available PHY context\n");
1272         return NULL;
1273 }
1274
1275 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1276                                 s16 tx_power)
1277 {
1278         struct iwl_dev_tx_power_cmd cmd = {
1279                 .v3.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1280                 .v3.mac_context_id =
1281                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1282                 .v3.pwr_restriction = cpu_to_le16(8 * tx_power),
1283         };
1284         int len = sizeof(cmd);
1285
1286         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1287                 cmd.v3.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1288
1289         if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK))
1290                 len = sizeof(cmd.v3);
1291
1292         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1293 }
1294
1295 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1296                                      struct ieee80211_vif *vif)
1297 {
1298         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1299         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1300         int ret;
1301
1302         mvmvif->mvm = mvm;
1303
1304         /*
1305          * make sure D0i3 exit is completed, otherwise a target access
1306          * during tx queue configuration could be done when still in
1307          * D0i3 state.
1308          */
1309         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1310         if (ret)
1311                 return ret;
1312
1313         /*
1314          * Not much to do here. The stack will not allow interface
1315          * types or combinations that we didn't advertise, so we
1316          * don't really have to check the types.
1317          */
1318
1319         mutex_lock(&mvm->mutex);
1320
1321         /* make sure that beacon statistics don't go backwards with FW reset */
1322         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1323                 mvmvif->beacon_stats.accu_num_beacons +=
1324                         mvmvif->beacon_stats.num_beacons;
1325
1326         /* Allocate resources for the MAC context, and add it to the fw  */
1327         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1328         if (ret)
1329                 goto out_unlock;
1330
1331         /* Counting number of interfaces is needed for legacy PM */
1332         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1333                 mvm->vif_count++;
1334
1335         /*
1336          * The AP binding flow can be done only after the beacon
1337          * template is configured (which happens only in the mac80211
1338          * start_ap() flow), and adding the broadcast station can happen
1339          * only after the binding.
1340          * In addition, since modifying the MAC before adding a bcast
1341          * station is not allowed by the FW, delay the adding of MAC context to
1342          * the point where we can also add the bcast station.
1343          * In short: there's not much we can do at this point, other than
1344          * allocating resources :)
1345          */
1346         if (vif->type == NL80211_IFTYPE_AP ||
1347             vif->type == NL80211_IFTYPE_ADHOC) {
1348                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1349                 if (ret) {
1350                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1351                         goto out_release;
1352                 }
1353
1354                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1355                 goto out_unlock;
1356         }
1357
1358         mvmvif->features |= hw->netdev_features;
1359
1360         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1361         if (ret)
1362                 goto out_release;
1363
1364         ret = iwl_mvm_power_update_mac(mvm);
1365         if (ret)
1366                 goto out_remove_mac;
1367
1368         /* beacon filtering */
1369         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1370         if (ret)
1371                 goto out_remove_mac;
1372
1373         if (!mvm->bf_allowed_vif &&
1374             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1375                 mvm->bf_allowed_vif = mvmvif;
1376                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1377                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1378         }
1379
1380         /*
1381          * P2P_DEVICE interface does not have a channel context assigned to it,
1382          * so a dedicated PHY context is allocated to it and the corresponding
1383          * MAC context is bound to it at this stage.
1384          */
1385         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1386
1387                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1388                 if (!mvmvif->phy_ctxt) {
1389                         ret = -ENOSPC;
1390                         goto out_free_bf;
1391                 }
1392
1393                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1394                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1395                 if (ret)
1396                         goto out_unref_phy;
1397
1398                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1399                 if (ret)
1400                         goto out_unbind;
1401
1402                 /* Save a pointer to p2p device vif, so it can later be used to
1403                  * update the p2p device MAC when a GO is started/stopped */
1404                 mvm->p2p_device_vif = vif;
1405         }
1406
1407         iwl_mvm_vif_dbgfs_register(mvm, vif);
1408         goto out_unlock;
1409
1410  out_unbind:
1411         iwl_mvm_binding_remove_vif(mvm, vif);
1412  out_unref_phy:
1413         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1414  out_free_bf:
1415         if (mvm->bf_allowed_vif == mvmvif) {
1416                 mvm->bf_allowed_vif = NULL;
1417                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1418                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1419         }
1420  out_remove_mac:
1421         mvmvif->phy_ctxt = NULL;
1422         iwl_mvm_mac_ctxt_remove(mvm, vif);
1423  out_release:
1424         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1425                 mvm->vif_count--;
1426
1427         iwl_mvm_mac_ctxt_release(mvm, vif);
1428  out_unlock:
1429         mutex_unlock(&mvm->mutex);
1430
1431         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1432
1433         return ret;
1434 }
1435
1436 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1437                                         struct ieee80211_vif *vif)
1438 {
1439         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1440
1441         if (tfd_msk) {
1442                 /*
1443                  * mac80211 first removes all the stations of the vif and
1444                  * then removes the vif. When it removes a station it also
1445                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1446                  * of all the stations of this vif are closed, and the queues
1447                  * of these AMPDU sessions are properly closed.
1448                  * We still need to take care of the shared queues of the vif.
1449                  * Flush them here.
1450                  */
1451                 mutex_lock(&mvm->mutex);
1452                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1453                 mutex_unlock(&mvm->mutex);
1454
1455                 /*
1456                  * There are transports that buffer a few frames in the host.
1457                  * For these, the flush above isn't enough since while we were
1458                  * flushing, the transport might have sent more frames to the
1459                  * device. To solve this, wait here until the transport is
1460                  * empty. Technically, this could have replaced the flush
1461                  * above, but flush is much faster than draining. So flush
1462                  * first, and drain to make sure we have no frames in the
1463                  * transport anymore.
1464                  * If a station still had frames on the shared queues, it is
1465                  * already marked as draining, so to complete the draining, we
1466                  * just need to wait until the transport is empty.
1467                  */
1468                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1469         }
1470
1471         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1472                 /*
1473                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1474                  * We assume here that all the packets sent to the OFFCHANNEL
1475                  * queue are sent in ROC session.
1476                  */
1477                 flush_work(&mvm->roc_done_wk);
1478         } else {
1479                 /*
1480                  * By now, all the AC queues are empty. The AGG queues are
1481                  * empty too. We already got all the Tx responses for all the
1482                  * packets in the queues. The drain work can have been
1483                  * triggered. Flush it.
1484                  */
1485                 flush_work(&mvm->sta_drained_wk);
1486         }
1487 }
1488
1489 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1490                                          struct ieee80211_vif *vif)
1491 {
1492         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1493         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1494
1495         iwl_mvm_prepare_mac_removal(mvm, vif);
1496
1497         mutex_lock(&mvm->mutex);
1498
1499         if (mvm->bf_allowed_vif == mvmvif) {
1500                 mvm->bf_allowed_vif = NULL;
1501                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1502                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1503         }
1504
1505         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1506
1507         /*
1508          * For AP/GO interface, the tear down of the resources allocated to the
1509          * interface is be handled as part of the stop_ap flow.
1510          */
1511         if (vif->type == NL80211_IFTYPE_AP ||
1512             vif->type == NL80211_IFTYPE_ADHOC) {
1513 #ifdef CONFIG_NL80211_TESTMODE
1514                 if (vif == mvm->noa_vif) {
1515                         mvm->noa_vif = NULL;
1516                         mvm->noa_duration = 0;
1517                 }
1518 #endif
1519                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1520                 goto out_release;
1521         }
1522
1523         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1524                 mvm->p2p_device_vif = NULL;
1525                 iwl_mvm_rm_bcast_sta(mvm, vif);
1526                 iwl_mvm_binding_remove_vif(mvm, vif);
1527                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1528                 mvmvif->phy_ctxt = NULL;
1529         }
1530
1531         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1532                 mvm->vif_count--;
1533
1534         iwl_mvm_power_update_mac(mvm);
1535         iwl_mvm_mac_ctxt_remove(mvm, vif);
1536
1537 out_release:
1538         iwl_mvm_mac_ctxt_release(mvm, vif);
1539         mutex_unlock(&mvm->mutex);
1540 }
1541
1542 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1543 {
1544         return 0;
1545 }
1546
1547 struct iwl_mvm_mc_iter_data {
1548         struct iwl_mvm *mvm;
1549         int port_id;
1550 };
1551
1552 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1553                                       struct ieee80211_vif *vif)
1554 {
1555         struct iwl_mvm_mc_iter_data *data = _data;
1556         struct iwl_mvm *mvm = data->mvm;
1557         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1558         int ret, len;
1559
1560         /* if we don't have free ports, mcast frames will be dropped */
1561         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1562                 return;
1563
1564         if (vif->type != NL80211_IFTYPE_STATION ||
1565             !vif->bss_conf.assoc)
1566                 return;
1567
1568         cmd->port_id = data->port_id++;
1569         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1570         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1571
1572         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1573         if (ret)
1574                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1575 }
1576
1577 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1578 {
1579         struct iwl_mvm_mc_iter_data iter_data = {
1580                 .mvm = mvm,
1581         };
1582
1583         lockdep_assert_held(&mvm->mutex);
1584
1585         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1586                 return;
1587
1588         ieee80211_iterate_active_interfaces_atomic(
1589                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1590                 iwl_mvm_mc_iface_iterator, &iter_data);
1591 }
1592
1593 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1594                                      struct netdev_hw_addr_list *mc_list)
1595 {
1596         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1597         struct iwl_mcast_filter_cmd *cmd;
1598         struct netdev_hw_addr *addr;
1599         int addr_count;
1600         bool pass_all;
1601         int len;
1602
1603         addr_count = netdev_hw_addr_list_count(mc_list);
1604         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1605                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1606         if (pass_all)
1607                 addr_count = 0;
1608
1609         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1610         cmd = kzalloc(len, GFP_ATOMIC);
1611         if (!cmd)
1612                 return 0;
1613
1614         if (pass_all) {
1615                 cmd->pass_all = 1;
1616                 return (u64)(unsigned long)cmd;
1617         }
1618
1619         netdev_hw_addr_list_for_each(addr, mc_list) {
1620                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1621                                    cmd->count, addr->addr);
1622                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1623                        addr->addr, ETH_ALEN);
1624                 cmd->count++;
1625         }
1626
1627         return (u64)(unsigned long)cmd;
1628 }
1629
1630 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1631                                      unsigned int changed_flags,
1632                                      unsigned int *total_flags,
1633                                      u64 multicast)
1634 {
1635         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1636         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1637
1638         mutex_lock(&mvm->mutex);
1639
1640         /* replace previous configuration */
1641         kfree(mvm->mcast_filter_cmd);
1642         mvm->mcast_filter_cmd = cmd;
1643
1644         if (!cmd)
1645                 goto out;
1646
1647         iwl_mvm_recalc_multicast(mvm);
1648 out:
1649         mutex_unlock(&mvm->mutex);
1650         *total_flags = 0;
1651 }
1652
1653 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1654                                         struct ieee80211_vif *vif,
1655                                         unsigned int filter_flags,
1656                                         unsigned int changed_flags)
1657 {
1658         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1659
1660         /* We support only filter for probe requests */
1661         if (!(changed_flags & FIF_PROBE_REQ))
1662                 return;
1663
1664         /* Supported only for p2p client interfaces */
1665         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1666             !vif->p2p)
1667                 return;
1668
1669         mutex_lock(&mvm->mutex);
1670         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1671         mutex_unlock(&mvm->mutex);
1672 }
1673
1674 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1675 struct iwl_bcast_iter_data {
1676         struct iwl_mvm *mvm;
1677         struct iwl_bcast_filter_cmd *cmd;
1678         u8 current_filter;
1679 };
1680
1681 static void
1682 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1683                          const struct iwl_fw_bcast_filter *in_filter,
1684                          struct iwl_fw_bcast_filter *out_filter)
1685 {
1686         struct iwl_fw_bcast_filter_attr *attr;
1687         int i;
1688
1689         memcpy(out_filter, in_filter, sizeof(*out_filter));
1690
1691         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1692                 attr = &out_filter->attrs[i];
1693
1694                 if (!attr->mask)
1695                         break;
1696
1697                 switch (attr->reserved1) {
1698                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1699                         if (vif->bss_conf.arp_addr_cnt != 1) {
1700                                 attr->mask = 0;
1701                                 continue;
1702                         }
1703
1704                         attr->val = vif->bss_conf.arp_addr_list[0];
1705                         break;
1706                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1707                         attr->val = *(__be32 *)&vif->addr[2];
1708                         break;
1709                 default:
1710                         break;
1711                 }
1712                 attr->reserved1 = 0;
1713                 out_filter->num_attrs++;
1714         }
1715 }
1716
1717 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1718                                           struct ieee80211_vif *vif)
1719 {
1720         struct iwl_bcast_iter_data *data = _data;
1721         struct iwl_mvm *mvm = data->mvm;
1722         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1723         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1724         struct iwl_fw_bcast_mac *bcast_mac;
1725         int i;
1726
1727         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1728                 return;
1729
1730         bcast_mac = &cmd->macs[mvmvif->id];
1731
1732         /*
1733          * enable filtering only for associated stations, but not for P2P
1734          * Clients
1735          */
1736         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1737             !vif->bss_conf.assoc)
1738                 return;
1739
1740         bcast_mac->default_discard = 1;
1741
1742         /* copy all configured filters */
1743         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1744                 /*
1745                  * Make sure we don't exceed our filters limit.
1746                  * if there is still a valid filter to be configured,
1747                  * be on the safe side and just allow bcast for this mac.
1748                  */
1749                 if (WARN_ON_ONCE(data->current_filter >=
1750                                  ARRAY_SIZE(cmd->filters))) {
1751                         bcast_mac->default_discard = 0;
1752                         bcast_mac->attached_filters = 0;
1753                         break;
1754                 }
1755
1756                 iwl_mvm_set_bcast_filter(vif,
1757                                          &mvm->bcast_filters[i],
1758                                          &cmd->filters[data->current_filter]);
1759
1760                 /* skip current filter if it contains no attributes */
1761                 if (!cmd->filters[data->current_filter].num_attrs)
1762                         continue;
1763
1764                 /* attach the filter to current mac */
1765                 bcast_mac->attached_filters |=
1766                                 cpu_to_le16(BIT(data->current_filter));
1767
1768                 data->current_filter++;
1769         }
1770 }
1771
1772 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1773                                     struct iwl_bcast_filter_cmd *cmd)
1774 {
1775         struct iwl_bcast_iter_data iter_data = {
1776                 .mvm = mvm,
1777                 .cmd = cmd,
1778         };
1779
1780         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1781                 return false;
1782
1783         memset(cmd, 0, sizeof(*cmd));
1784         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1785         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1786
1787 #ifdef CONFIG_IWLWIFI_DEBUGFS
1788         /* use debugfs filters/macs if override is configured */
1789         if (mvm->dbgfs_bcast_filtering.override) {
1790                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1791                        sizeof(cmd->filters));
1792                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1793                        sizeof(cmd->macs));
1794                 return true;
1795         }
1796 #endif
1797
1798         /* if no filters are configured, do nothing */
1799         if (!mvm->bcast_filters)
1800                 return false;
1801
1802         /* configure and attach these filters for each associated sta vif */
1803         ieee80211_iterate_active_interfaces(
1804                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1805                 iwl_mvm_bcast_filter_iterator, &iter_data);
1806
1807         return true;
1808 }
1809
1810 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1811 {
1812         struct iwl_bcast_filter_cmd cmd;
1813
1814         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1815                 return 0;
1816
1817         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1818                 return 0;
1819
1820         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1821                                     sizeof(cmd), &cmd);
1822 }
1823 #else
1824 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1825 {
1826         return 0;
1827 }
1828 #endif
1829
1830 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1831                                     struct ieee80211_vif *vif)
1832 {
1833         struct iwl_mu_group_mgmt_cmd cmd = {};
1834
1835         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1836                WLAN_MEMBERSHIP_LEN);
1837         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1838                WLAN_USER_POSITION_LEN);
1839
1840         return iwl_mvm_send_cmd_pdu(mvm,
1841                                     WIDE_ID(DATA_PATH_GROUP,
1842                                             UPDATE_MU_GROUPS_CMD),
1843                                     0, sizeof(cmd), &cmd);
1844 }
1845
1846 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1847                                            struct ieee80211_vif *vif)
1848 {
1849         if (vif->mu_mimo_owner) {
1850                 struct iwl_mu_group_mgmt_notif *notif = _data;
1851
1852                 /*
1853                  * MU-MIMO Group Id action frame is little endian. We treat
1854                  * the data received from firmware as if it came from the
1855                  * action frame, so no conversion is needed.
1856                  */
1857                 ieee80211_update_mu_groups(vif,
1858                                            (u8 *)&notif->membership_status,
1859                                            (u8 *)&notif->user_position);
1860         }
1861 }
1862
1863 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1864                                struct iwl_rx_cmd_buffer *rxb)
1865 {
1866         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1867         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1868
1869         ieee80211_iterate_active_interfaces_atomic(
1870                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1871                         iwl_mvm_mu_mimo_iface_iterator, notif);
1872 }
1873
1874 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1875                                              struct ieee80211_vif *vif,
1876                                              struct ieee80211_bss_conf *bss_conf,
1877                                              u32 changes)
1878 {
1879         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1880         int ret;
1881
1882         /*
1883          * Re-calculate the tsf id, as the master-slave relations depend on the
1884          * beacon interval, which was not known when the station interface was
1885          * added.
1886          */
1887         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1888                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1889
1890         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1891             mvmvif->lqm_active)
1892                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1893                                      0, 0);
1894
1895         /*
1896          * If we're not associated yet, take the (new) BSSID before associating
1897          * so the firmware knows. If we're already associated, then use the old
1898          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1899          * branch for disassociation below.
1900          */
1901         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1902                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1903
1904         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1905         if (ret)
1906                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1907
1908         /* after sending it once, adopt mac80211 data */
1909         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1910         mvmvif->associated = bss_conf->assoc;
1911
1912         if (changes & BSS_CHANGED_ASSOC) {
1913                 if (bss_conf->assoc) {
1914                         /* clear statistics to get clean beacon counter */
1915                         iwl_mvm_request_statistics(mvm, true);
1916                         memset(&mvmvif->beacon_stats, 0,
1917                                sizeof(mvmvif->beacon_stats));
1918
1919                         /* add quota for this interface */
1920                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1921                         if (ret) {
1922                                 IWL_ERR(mvm, "failed to update quotas\n");
1923                                 return;
1924                         }
1925
1926                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1927                                      &mvm->status)) {
1928                                 /*
1929                                  * If we're restarting then the firmware will
1930                                  * obviously have lost synchronisation with
1931                                  * the AP. It will attempt to synchronise by
1932                                  * itself, but we can make it more reliable by
1933                                  * scheduling a session protection time event.
1934                                  *
1935                                  * The firmware needs to receive a beacon to
1936                                  * catch up with synchronisation, use 110% of
1937                                  * the beacon interval.
1938                                  *
1939                                  * Set a large maximum delay to allow for more
1940                                  * than a single interface.
1941                                  */
1942                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1943                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1944                                                         5 * dur, false);
1945                         }
1946
1947                         iwl_mvm_sf_update(mvm, vif, false);
1948                         iwl_mvm_power_vif_assoc(mvm, vif);
1949                         if (vif->p2p) {
1950                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1951                                 iwl_mvm_update_smps(mvm, vif,
1952                                                     IWL_MVM_SMPS_REQ_PROT,
1953                                                     IEEE80211_SMPS_DYNAMIC);
1954                         }
1955                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1956                         /*
1957                          * If update fails - SF might be running in associated
1958                          * mode while disassociated - which is forbidden.
1959                          */
1960                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1961                                   "Failed to update SF upon disassociation\n");
1962
1963                         /* remove AP station now that the MAC is unassoc */
1964                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1965                         if (ret)
1966                                 IWL_ERR(mvm, "failed to remove AP station\n");
1967
1968                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1969                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1970                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1971                         /* remove quota for this interface */
1972                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1973                         if (ret)
1974                                 IWL_ERR(mvm, "failed to update quotas\n");
1975
1976                         if (vif->p2p)
1977                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1978
1979                         /* this will take the cleared BSSID from bss_conf */
1980                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1981                         if (ret)
1982                                 IWL_ERR(mvm,
1983                                         "failed to update MAC %pM (clear after unassoc)\n",
1984                                         vif->addr);
1985                 }
1986
1987                 /*
1988                  * The firmware tracks the MU-MIMO group on its own.
1989                  * However, on HW restart we should restore this data.
1990                  */
1991                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1992                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1993                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1994                         if (ret)
1995                                 IWL_ERR(mvm,
1996                                         "failed to update VHT MU_MIMO groups\n");
1997                 }
1998
1999                 iwl_mvm_recalc_multicast(mvm);
2000                 iwl_mvm_configure_bcast_filter(mvm);
2001
2002                 /* reset rssi values */
2003                 mvmvif->bf_data.ave_beacon_signal = 0;
2004
2005                 iwl_mvm_bt_coex_vif_change(mvm);
2006                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2007                                     IEEE80211_SMPS_AUTOMATIC);
2008                 if (fw_has_capa(&mvm->fw->ucode_capa,
2009                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2010                         iwl_mvm_config_scan(mvm);
2011         }
2012
2013         if (changes & BSS_CHANGED_BEACON_INFO) {
2014                 /*
2015                  * We received a beacon from the associated AP so
2016                  * remove the session protection.
2017                  */
2018                 iwl_mvm_remove_time_event(mvm, mvmvif,
2019                                           &mvmvif->time_event_data);
2020
2021                 iwl_mvm_sf_update(mvm, vif, false);
2022                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2023         }
2024
2025         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
2026                        /*
2027                         * Send power command on every beacon change,
2028                         * because we may have not enabled beacon abort yet.
2029                         */
2030                        BSS_CHANGED_BEACON_INFO)) {
2031                 ret = iwl_mvm_power_update_mac(mvm);
2032                 if (ret)
2033                         IWL_ERR(mvm, "failed to update power mode\n");
2034         }
2035
2036         if (changes & BSS_CHANGED_TXPOWER) {
2037                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2038                                 bss_conf->txpower);
2039                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2040         }
2041
2042         if (changes & BSS_CHANGED_CQM) {
2043                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2044                 /* reset cqm events tracking */
2045                 mvmvif->bf_data.last_cqm_event = 0;
2046                 if (mvmvif->bf_data.bf_enabled) {
2047                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2048                         if (ret)
2049                                 IWL_ERR(mvm,
2050                                         "failed to update CQM thresholds\n");
2051                 }
2052         }
2053
2054         if (changes & BSS_CHANGED_ARP_FILTER) {
2055                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2056                 iwl_mvm_configure_bcast_filter(mvm);
2057         }
2058 }
2059
2060 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2061                                  struct ieee80211_vif *vif)
2062 {
2063         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2064         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2065         int ret;
2066
2067         /*
2068          * iwl_mvm_mac_ctxt_add() might read directly from the device
2069          * (the system time), so make sure it is available.
2070          */
2071         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2072         if (ret)
2073                 return ret;
2074
2075         mutex_lock(&mvm->mutex);
2076
2077         /* Send the beacon template */
2078         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2079         if (ret)
2080                 goto out_unlock;
2081
2082         /*
2083          * Re-calculate the tsf id, as the master-slave relations depend on the
2084          * beacon interval, which was not known when the AP interface was added.
2085          */
2086         if (vif->type == NL80211_IFTYPE_AP)
2087                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2088
2089         mvmvif->ap_assoc_sta_count = 0;
2090
2091         /* Add the mac context */
2092         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2093         if (ret)
2094                 goto out_unlock;
2095
2096         /* Perform the binding */
2097         ret = iwl_mvm_binding_add_vif(mvm, vif);
2098         if (ret)
2099                 goto out_remove;
2100
2101         /* Send the bcast station. At this stage the TBTT and DTIM time events
2102          * are added and applied to the scheduler */
2103         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2104         if (ret)
2105                 goto out_unbind;
2106
2107         /* must be set before quota calculations */
2108         mvmvif->ap_ibss_active = true;
2109
2110         /* power updated needs to be done before quotas */
2111         iwl_mvm_power_update_mac(mvm);
2112
2113         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2114         if (ret)
2115                 goto out_quota_failed;
2116
2117         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2118         if (vif->p2p && mvm->p2p_device_vif)
2119                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2120
2121         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2122
2123         iwl_mvm_bt_coex_vif_change(mvm);
2124
2125         /* we don't support TDLS during DCM */
2126         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2127                 iwl_mvm_teardown_tdls_peers(mvm);
2128
2129         goto out_unlock;
2130
2131 out_quota_failed:
2132         iwl_mvm_power_update_mac(mvm);
2133         mvmvif->ap_ibss_active = false;
2134         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2135 out_unbind:
2136         iwl_mvm_binding_remove_vif(mvm, vif);
2137 out_remove:
2138         iwl_mvm_mac_ctxt_remove(mvm, vif);
2139 out_unlock:
2140         mutex_unlock(&mvm->mutex);
2141         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2142         return ret;
2143 }
2144
2145 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2146                                  struct ieee80211_vif *vif)
2147 {
2148         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2149         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2150
2151         iwl_mvm_prepare_mac_removal(mvm, vif);
2152
2153         mutex_lock(&mvm->mutex);
2154
2155         /* Handle AP stop while in CSA */
2156         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2157                 iwl_mvm_remove_time_event(mvm, mvmvif,
2158                                           &mvmvif->time_event_data);
2159                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2160                 mvmvif->csa_countdown = false;
2161         }
2162
2163         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2164                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2165                 mvm->csa_tx_block_bcn_timeout = 0;
2166         }
2167
2168         mvmvif->ap_ibss_active = false;
2169         mvm->ap_last_beacon_gp2 = 0;
2170
2171         iwl_mvm_bt_coex_vif_change(mvm);
2172
2173         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2174
2175         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2176         if (vif->p2p && mvm->p2p_device_vif)
2177                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2178
2179         iwl_mvm_update_quotas(mvm, false, NULL);
2180         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2181         iwl_mvm_binding_remove_vif(mvm, vif);
2182
2183         iwl_mvm_power_update_mac(mvm);
2184
2185         iwl_mvm_mac_ctxt_remove(mvm, vif);
2186
2187         mutex_unlock(&mvm->mutex);
2188 }
2189
2190 static void
2191 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2192                                  struct ieee80211_vif *vif,
2193                                  struct ieee80211_bss_conf *bss_conf,
2194                                  u32 changes)
2195 {
2196         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2197
2198         /* Changes will be applied when the AP/IBSS is started */
2199         if (!mvmvif->ap_ibss_active)
2200                 return;
2201
2202         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2203                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2204             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2205                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2206
2207         /* Need to send a new beacon template to the FW */
2208         if (changes & BSS_CHANGED_BEACON &&
2209             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2210                 IWL_WARN(mvm, "Failed updating beacon data\n");
2211
2212         if (changes & BSS_CHANGED_TXPOWER) {
2213                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2214                                 bss_conf->txpower);
2215                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2216         }
2217 }
2218
2219 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2220                                      struct ieee80211_vif *vif,
2221                                      struct ieee80211_bss_conf *bss_conf,
2222                                      u32 changes)
2223 {
2224         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2225
2226         /*
2227          * iwl_mvm_bss_info_changed_station() might call
2228          * iwl_mvm_protect_session(), which reads directly from
2229          * the device (the system time), so make sure it is available.
2230          */
2231         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2232                 return;
2233
2234         mutex_lock(&mvm->mutex);
2235
2236         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2237                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2238
2239         switch (vif->type) {
2240         case NL80211_IFTYPE_STATION:
2241                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2242                 break;
2243         case NL80211_IFTYPE_AP:
2244         case NL80211_IFTYPE_ADHOC:
2245                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2246                 break;
2247         case NL80211_IFTYPE_MONITOR:
2248                 if (changes & BSS_CHANGED_MU_GROUPS)
2249                         iwl_mvm_update_mu_groups(mvm, vif);
2250                 break;
2251         default:
2252                 /* shouldn't happen */
2253                 WARN_ON_ONCE(1);
2254         }
2255
2256         mutex_unlock(&mvm->mutex);
2257         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2258 }
2259
2260 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2261                                struct ieee80211_vif *vif,
2262                                struct ieee80211_scan_request *hw_req)
2263 {
2264         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2265         int ret;
2266
2267         if (hw_req->req.n_channels == 0 ||
2268             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2269                 return -EINVAL;
2270
2271         mutex_lock(&mvm->mutex);
2272         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2273         mutex_unlock(&mvm->mutex);
2274
2275         return ret;
2276 }
2277
2278 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2279                                        struct ieee80211_vif *vif)
2280 {
2281         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2282
2283         mutex_lock(&mvm->mutex);
2284
2285         /* Due to a race condition, it's possible that mac80211 asks
2286          * us to stop a hw_scan when it's already stopped.  This can
2287          * happen, for instance, if we stopped the scan ourselves,
2288          * called ieee80211_scan_completed() and the userspace called
2289          * cancel scan scan before ieee80211_scan_work() could run.
2290          * To handle that, simply return if the scan is not running.
2291         */
2292         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2293                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2294
2295         mutex_unlock(&mvm->mutex);
2296 }
2297
2298 static void
2299 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2300                                   struct ieee80211_sta *sta, u16 tids,
2301                                   int num_frames,
2302                                   enum ieee80211_frame_release_type reason,
2303                                   bool more_data)
2304 {
2305         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2306
2307         /* Called when we need to transmit (a) frame(s) from mac80211 */
2308
2309         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2310                                           tids, more_data, false);
2311 }
2312
2313 static void
2314 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2315                                     struct ieee80211_sta *sta, u16 tids,
2316                                     int num_frames,
2317                                     enum ieee80211_frame_release_type reason,
2318                                     bool more_data)
2319 {
2320         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2321
2322         /* Called when we need to transmit (a) frame(s) from agg queue */
2323
2324         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2325                                           tids, more_data, true);
2326 }
2327
2328 static void __iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2329                                      enum sta_notify_cmd cmd,
2330                                      struct ieee80211_sta *sta)
2331 {
2332         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2333         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2334         unsigned long txqs = 0, tids = 0;
2335         int tid;
2336
2337         spin_lock_bh(&mvmsta->lock);
2338         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2339                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2340
2341                 if (tid_data->state != IWL_AGG_ON &&
2342                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2343                         continue;
2344
2345                 __set_bit(tid_data->txq_id, &txqs);
2346
2347                 if (iwl_mvm_tid_queued(tid_data) == 0)
2348                         continue;
2349
2350                 __set_bit(tid, &tids);
2351         }
2352
2353         switch (cmd) {
2354         case STA_NOTIFY_SLEEP:
2355                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2356                         ieee80211_sta_block_awake(hw, sta, true);
2357
2358                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2359                         ieee80211_sta_set_buffered(sta, tid, true);
2360
2361                 if (txqs)
2362                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2363                 /*
2364                  * The fw updates the STA to be asleep. Tx packets on the Tx
2365                  * queues to this station will not be transmitted. The fw will
2366                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2367                  */
2368                 break;
2369         case STA_NOTIFY_AWAKE:
2370                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2371                         break;
2372
2373                 if (txqs)
2374                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2375                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2376                 break;
2377         default:
2378                 break;
2379         }
2380         spin_unlock_bh(&mvmsta->lock);
2381 }
2382
2383 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2384                                    struct ieee80211_vif *vif,
2385                                    enum sta_notify_cmd cmd,
2386                                    struct ieee80211_sta *sta)
2387 {
2388         __iwl_mvm_mac_sta_notify(hw, cmd, sta);
2389 }
2390
2391 void iwl_mvm_sta_pm_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2392 {
2393         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2394         struct iwl_mvm_pm_state_notification *notif = (void *)pkt->data;
2395         struct ieee80211_sta *sta;
2396         struct iwl_mvm_sta *mvmsta;
2397         bool sleeping = (notif->type != IWL_MVM_PM_EVENT_AWAKE);
2398
2399         if (WARN_ON(notif->sta_id >= ARRAY_SIZE(mvm->fw_id_to_mac_id)))
2400                 return;
2401
2402         rcu_read_lock();
2403         sta = mvm->fw_id_to_mac_id[notif->sta_id];
2404         if (WARN_ON(IS_ERR_OR_NULL(sta))) {
2405                 rcu_read_unlock();
2406                 return;
2407         }
2408
2409         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2410
2411         if (!mvmsta->vif ||
2412             mvmsta->vif->type != NL80211_IFTYPE_AP) {
2413                 rcu_read_unlock();
2414                 return;
2415         }
2416
2417         if (mvmsta->sleeping != sleeping) {
2418                 mvmsta->sleeping = sleeping;
2419                 __iwl_mvm_mac_sta_notify(mvm->hw,
2420                         sleeping ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE,
2421                         sta);
2422                 ieee80211_sta_ps_transition(sta, sleeping);
2423         }
2424
2425         if (sleeping) {
2426                 switch (notif->type) {
2427                 case IWL_MVM_PM_EVENT_AWAKE:
2428                 case IWL_MVM_PM_EVENT_ASLEEP:
2429                         break;
2430                 case IWL_MVM_PM_EVENT_UAPSD:
2431                         ieee80211_sta_uapsd_trigger(sta, IEEE80211_NUM_TIDS);
2432                         break;
2433                 case IWL_MVM_PM_EVENT_PS_POLL:
2434                         ieee80211_sta_pspoll(sta);
2435                         break;
2436                 default:
2437                         break;
2438                 }
2439         }
2440
2441         rcu_read_unlock();
2442 }
2443
2444 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2445                                        struct ieee80211_vif *vif,
2446                                        struct ieee80211_sta *sta)
2447 {
2448         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2449         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2450
2451         /*
2452          * This is called before mac80211 does RCU synchronisation,
2453          * so here we already invalidate our internal RCU-protected
2454          * station pointer. The rest of the code will thus no longer
2455          * be able to find the station this way, and we don't rely
2456          * on further RCU synchronisation after the sta_state()
2457          * callback deleted the station.
2458          */
2459         mutex_lock(&mvm->mutex);
2460         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2461                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2462                                    ERR_PTR(-ENOENT));
2463
2464         mutex_unlock(&mvm->mutex);
2465 }
2466
2467 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2468                                 const u8 *bssid)
2469 {
2470         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2471                 return;
2472
2473         if (vif->p2p && !iwl_mvm_is_p2p_scm_uapsd_supported(mvm)) {
2474                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2475                 return;
2476         }
2477
2478         if (!vif->p2p &&
2479             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2480                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2481                 return;
2482         }
2483
2484         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2485 }
2486
2487 static void
2488 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2489                            struct ieee80211_vif *vif, u8 *peer_addr,
2490                            enum nl80211_tdls_operation action)
2491 {
2492         struct iwl_fw_dbg_trigger_tlv *trig;
2493         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2494
2495         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2496                 return;
2497
2498         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2499         tdls_trig = (void *)trig->data;
2500         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2501                 return;
2502
2503         if (!(tdls_trig->action_bitmap & BIT(action)))
2504                 return;
2505
2506         if (tdls_trig->peer_mode &&
2507             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2508                 return;
2509
2510         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2511                                     "TDLS event occurred, peer %pM, action %d",
2512                                     peer_addr, action);
2513 }
2514
2515 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2516                                              struct iwl_mvm_sta *mvm_sta)
2517 {
2518         struct iwl_mvm_tid_data *tid_data;
2519         struct sk_buff *skb;
2520         int i;
2521
2522         spin_lock_bh(&mvm_sta->lock);
2523         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2524                 tid_data = &mvm_sta->tid_data[i];
2525                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2526                         ieee80211_free_txskb(mvm->hw, skb);
2527         }
2528         spin_unlock_bh(&mvm_sta->lock);
2529 }
2530
2531 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2532                                  struct ieee80211_vif *vif,
2533                                  struct ieee80211_sta *sta,
2534                                  enum ieee80211_sta_state old_state,
2535                                  enum ieee80211_sta_state new_state)
2536 {
2537         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2538         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2539         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2540         int ret;
2541
2542         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2543                            sta->addr, old_state, new_state);
2544
2545         /* this would be a mac80211 bug ... but don't crash */
2546         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2547                 return -EINVAL;
2548
2549         /* if a STA is being removed, reuse its ID */
2550         flush_work(&mvm->sta_drained_wk);
2551
2552         /*
2553          * If we are in a STA removal flow and in DQA mode:
2554          *
2555          * This is after the sync_rcu part, so the queues have already been
2556          * flushed. No more TXs on their way in mac80211's path, and no more in
2557          * the queues.
2558          * Also, we won't be getting any new TX frames for this station.
2559          * What we might have are deferred TX frames that need to be taken care
2560          * of.
2561          *
2562          * Drop any still-queued deferred-frame before removing the STA, and
2563          * make sure the worker is no longer handling frames for this STA.
2564          */
2565         if (old_state == IEEE80211_STA_NONE &&
2566             new_state == IEEE80211_STA_NOTEXIST &&
2567             iwl_mvm_is_dqa_supported(mvm)) {
2568                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2569                 flush_work(&mvm->add_stream_wk);
2570
2571                 /*
2572                  * No need to make sure deferred TX indication is off since the
2573                  * worker will already remove it if it was on
2574                  */
2575         }
2576
2577         mutex_lock(&mvm->mutex);
2578         /* track whether or not the station is associated */
2579         mvm_sta->associated = new_state >= IEEE80211_STA_ASSOC;
2580
2581         if (old_state == IEEE80211_STA_NOTEXIST &&
2582             new_state == IEEE80211_STA_NONE) {
2583                 /*
2584                  * Firmware bug - it'll crash if the beacon interval is less
2585                  * than 16. We can't avoid connecting at all, so refuse the
2586                  * station state change, this will cause mac80211 to abandon
2587                  * attempts to connect to this AP, and eventually wpa_s will
2588                  * blacklist the AP...
2589                  */
2590                 if (vif->type == NL80211_IFTYPE_STATION &&
2591                     vif->bss_conf.beacon_int < 16) {
2592                         IWL_ERR(mvm,
2593                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2594                                 sta->addr, vif->bss_conf.beacon_int);
2595                         ret = -EINVAL;
2596                         goto out_unlock;
2597                 }
2598
2599                 if (sta->tdls &&
2600                     (vif->p2p ||
2601                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2602                                                 IWL_MVM_TDLS_STA_COUNT ||
2603                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2604                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2605                         ret = -EBUSY;
2606                         goto out_unlock;
2607                 }
2608
2609                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2610                 if (sta->tdls && ret == 0) {
2611                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2612                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2613                                                    NL80211_TDLS_SETUP);
2614                 }
2615         } else if (old_state == IEEE80211_STA_NONE &&
2616                    new_state == IEEE80211_STA_AUTH) {
2617                 /*
2618                  * EBS may be disabled due to previous failures reported by FW.
2619                  * Reset EBS status here assuming environment has been changed.
2620                  */
2621                 mvm->last_ebs_successful = true;
2622                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2623                 ret = 0;
2624         } else if (old_state == IEEE80211_STA_AUTH &&
2625                    new_state == IEEE80211_STA_ASSOC) {
2626                 if (vif->type == NL80211_IFTYPE_AP) {
2627                         mvmvif->ap_assoc_sta_count++;
2628                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2629                 }
2630
2631                 iwl_mvm_rs_rate_init(mvm, sta, mvmvif->phy_ctxt->channel->band,
2632                                      true);
2633                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2634         } else if (old_state == IEEE80211_STA_ASSOC &&
2635                    new_state == IEEE80211_STA_AUTHORIZED) {
2636
2637                 /* we don't support TDLS during DCM */
2638                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2639                         iwl_mvm_teardown_tdls_peers(mvm);
2640
2641                 if (sta->tdls)
2642                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2643                                                    NL80211_TDLS_ENABLE_LINK);
2644
2645                 /* enable beacon filtering */
2646                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2647                 ret = 0;
2648         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2649                    new_state == IEEE80211_STA_ASSOC) {
2650                 /* disable beacon filtering */
2651                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2652                 ret = 0;
2653         } else if (old_state == IEEE80211_STA_ASSOC &&
2654                    new_state == IEEE80211_STA_AUTH) {
2655                 if (vif->type == NL80211_IFTYPE_AP) {
2656                         mvmvif->ap_assoc_sta_count--;
2657                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2658                 }
2659                 ret = 0;
2660         } else if (old_state == IEEE80211_STA_AUTH &&
2661                    new_state == IEEE80211_STA_NONE) {
2662                 ret = 0;
2663         } else if (old_state == IEEE80211_STA_NONE &&
2664                    new_state == IEEE80211_STA_NOTEXIST) {
2665                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2666                 if (sta->tdls) {
2667                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2668                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2669                                                    NL80211_TDLS_DISABLE_LINK);
2670                 }
2671         } else {
2672                 ret = -EIO;
2673         }
2674  out_unlock:
2675         mutex_unlock(&mvm->mutex);
2676
2677         if (sta->tdls && ret == 0) {
2678                 if (old_state == IEEE80211_STA_NOTEXIST &&
2679                     new_state == IEEE80211_STA_NONE)
2680                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2681                 else if (old_state == IEEE80211_STA_NONE &&
2682                          new_state == IEEE80211_STA_NOTEXIST)
2683                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2684         }
2685
2686         return ret;
2687 }
2688
2689 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2690 {
2691         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2692
2693         mvm->rts_threshold = value;
2694
2695         return 0;
2696 }
2697
2698 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2699                                   struct ieee80211_vif *vif,
2700                                   struct ieee80211_sta *sta, u32 changed)
2701 {
2702         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2703
2704         if (vif->type == NL80211_IFTYPE_STATION &&
2705             changed & IEEE80211_RC_NSS_CHANGED)
2706                 iwl_mvm_sf_update(mvm, vif, false);
2707 }
2708
2709 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2710                                struct ieee80211_vif *vif, u16 ac,
2711                                const struct ieee80211_tx_queue_params *params)
2712 {
2713         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2714         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2715
2716         mvmvif->queue_params[ac] = *params;
2717
2718         /*
2719          * No need to update right away, we'll get BSS_CHANGED_QOS
2720          * The exception is P2P_DEVICE interface which needs immediate update.
2721          */
2722         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2723                 int ret;
2724
2725                 mutex_lock(&mvm->mutex);
2726                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2727                 mutex_unlock(&mvm->mutex);
2728                 return ret;
2729         }
2730         return 0;
2731 }
2732
2733 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2734                                       struct ieee80211_vif *vif)
2735 {
2736         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2737         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2738         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2739
2740         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2741                 return;
2742
2743         /*
2744          * iwl_mvm_protect_session() reads directly from the device
2745          * (the system time), so make sure it is available.
2746          */
2747         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2748                 return;
2749
2750         mutex_lock(&mvm->mutex);
2751         /* Try really hard to protect the session and hear a beacon */
2752         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2753         mutex_unlock(&mvm->mutex);
2754
2755         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2756 }
2757
2758 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2759                                         struct ieee80211_vif *vif,
2760                                         struct cfg80211_sched_scan_request *req,
2761                                         struct ieee80211_scan_ies *ies)
2762 {
2763         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2764
2765         int ret;
2766
2767         mutex_lock(&mvm->mutex);
2768
2769         if (!vif->bss_conf.idle) {
2770                 ret = -EBUSY;
2771                 goto out;
2772         }
2773
2774         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2775
2776 out:
2777         mutex_unlock(&mvm->mutex);
2778         return ret;
2779 }
2780
2781 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2782                                        struct ieee80211_vif *vif)
2783 {
2784         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2785         int ret;
2786
2787         mutex_lock(&mvm->mutex);
2788
2789         /* Due to a race condition, it's possible that mac80211 asks
2790          * us to stop a sched_scan when it's already stopped.  This
2791          * can happen, for instance, if we stopped the scan ourselves,
2792          * called ieee80211_sched_scan_stopped() and the userspace called
2793          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2794          * could run.  To handle this, simply return if the scan is
2795          * not running.
2796         */
2797         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2798                 mutex_unlock(&mvm->mutex);
2799                 return 0;
2800         }
2801
2802         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2803         mutex_unlock(&mvm->mutex);
2804         iwl_mvm_wait_for_async_handlers(mvm);
2805
2806         return ret;
2807 }
2808
2809 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2810                                enum set_key_cmd cmd,
2811                                struct ieee80211_vif *vif,
2812                                struct ieee80211_sta *sta,
2813                                struct ieee80211_key_conf *key)
2814 {
2815         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2816         struct iwl_mvm_sta *mvmsta;
2817         struct iwl_mvm_key_pn *ptk_pn;
2818         int keyidx = key->keyidx;
2819         int ret;
2820         u8 key_offset;
2821
2822         if (iwlwifi_mod_params.sw_crypto) {
2823                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2824                 return -EOPNOTSUPP;
2825         }
2826
2827         switch (key->cipher) {
2828         case WLAN_CIPHER_SUITE_TKIP:
2829                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2830                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2831                 break;
2832         case WLAN_CIPHER_SUITE_CCMP:
2833         case WLAN_CIPHER_SUITE_GCMP:
2834         case WLAN_CIPHER_SUITE_GCMP_256:
2835                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2836                 break;
2837         case WLAN_CIPHER_SUITE_AES_CMAC:
2838         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2839         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2840                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2841                 break;
2842         case WLAN_CIPHER_SUITE_WEP40:
2843         case WLAN_CIPHER_SUITE_WEP104:
2844                 /* For non-client mode, only use WEP keys for TX as we probably
2845                  * don't have a station yet anyway and would then have to keep
2846                  * track of the keys, linking them to each of the clients/peers
2847                  * as they appear. For now, don't do that, for performance WEP
2848                  * offload doesn't really matter much, but we need it for some
2849                  * other offload features in client mode.
2850                  */
2851                 if (vif->type != NL80211_IFTYPE_STATION)
2852                         return 0;
2853                 break;
2854         default:
2855                 /* currently FW supports only one optional cipher scheme */
2856                 if (hw->n_cipher_schemes &&
2857                     hw->cipher_schemes->cipher == key->cipher)
2858                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2859                 else
2860                         return -EOPNOTSUPP;
2861         }
2862
2863         mutex_lock(&mvm->mutex);
2864
2865         switch (cmd) {
2866         case SET_KEY:
2867                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2868                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2869                         /*
2870                          * GTK on AP interface is a TX-only key, return 0;
2871                          * on IBSS they're per-station and because we're lazy
2872                          * we don't support them for RX, so do the same.
2873                          * CMAC/GMAC in AP/IBSS modes must be done in software.
2874                          */
2875                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
2876                             key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
2877                             key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2878                                 ret = -EOPNOTSUPP;
2879                         else
2880                                 ret = 0;
2881                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2882                         break;
2883                 }
2884
2885                 /* During FW restart, in order to restore the state as it was,
2886                  * don't try to reprogram keys we previously failed for.
2887                  */
2888                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2889                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2890                         IWL_DEBUG_MAC80211(mvm,
2891                                            "skip invalid idx key programming during restart\n");
2892                         ret = 0;
2893                         break;
2894                 }
2895
2896                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2897                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2898                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2899                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2900                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2901                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2902                         struct ieee80211_key_seq seq;
2903                         int tid, q;
2904
2905                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2906                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2907                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2908                                          mvm->trans->num_rx_queues *
2909                                                 sizeof(ptk_pn->q[0]),
2910                                          GFP_KERNEL);
2911                         if (!ptk_pn) {
2912                                 ret = -ENOMEM;
2913                                 break;
2914                         }
2915
2916                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2917                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2918                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2919                                         memcpy(ptk_pn->q[q].pn[tid],
2920                                                seq.ccmp.pn,
2921                                                IEEE80211_CCMP_PN_LEN);
2922                         }
2923
2924                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2925                 }
2926
2927                 /* in HW restart reuse the index, otherwise request a new one */
2928                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2929                         key_offset = key->hw_key_idx;
2930                 else
2931                         key_offset = STA_KEY_IDX_INVALID;
2932
2933                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2934                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2935                 if (ret) {
2936                         IWL_WARN(mvm, "set key failed\n");
2937                         /*
2938                          * can't add key for RX, but we don't need it
2939                          * in the device for TX so still return 0
2940                          */
2941                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2942                         ret = 0;
2943                 }
2944
2945                 break;
2946         case DISABLE_KEY:
2947                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2948                         ret = 0;
2949                         break;
2950                 }
2951
2952                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2953                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2954                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2955                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2956                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2957                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2958                         ptk_pn = rcu_dereference_protected(
2959                                                 mvmsta->ptk_pn[keyidx],
2960                                                 lockdep_is_held(&mvm->mutex));
2961                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2962                         if (ptk_pn)
2963                                 kfree_rcu(ptk_pn, rcu_head);
2964                 }
2965
2966                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2967                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2968                 break;
2969         default:
2970                 ret = -EINVAL;
2971         }
2972
2973         mutex_unlock(&mvm->mutex);
2974         return ret;
2975 }
2976
2977 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2978                                         struct ieee80211_vif *vif,
2979                                         struct ieee80211_key_conf *keyconf,
2980                                         struct ieee80211_sta *sta,
2981                                         u32 iv32, u16 *phase1key)
2982 {
2983         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2984
2985         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2986                 return;
2987
2988         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2989 }
2990
2991
2992 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2993                                struct iwl_rx_packet *pkt, void *data)
2994 {
2995         struct iwl_mvm *mvm =
2996                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2997         struct iwl_hs20_roc_res *resp;
2998         int resp_len = iwl_rx_packet_payload_len(pkt);
2999         struct iwl_mvm_time_event_data *te_data = data;
3000
3001         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
3002                 return true;
3003
3004         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
3005                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
3006                 return true;
3007         }
3008
3009         resp = (void *)pkt->data;
3010
3011         IWL_DEBUG_TE(mvm,
3012                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
3013                      resp->status, resp->event_unique_id);
3014
3015         te_data->uid = le32_to_cpu(resp->event_unique_id);
3016         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
3017                      te_data->uid);
3018
3019         spin_lock_bh(&mvm->time_event_lock);
3020         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
3021         spin_unlock_bh(&mvm->time_event_lock);
3022
3023         return true;
3024 }
3025
3026 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
3027 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
3028 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
3029 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
3030 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
3031 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
3032                                     struct ieee80211_channel *channel,
3033                                     struct ieee80211_vif *vif,
3034                                     int duration)
3035 {
3036         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
3037         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3038         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
3039         static const u16 time_event_response[] = { HOT_SPOT_CMD };
3040         struct iwl_notification_wait wait_time_event;
3041         u32 dtim_interval = vif->bss_conf.dtim_period *
3042                 vif->bss_conf.beacon_int;
3043         u32 req_dur, delay;
3044         struct iwl_hs20_roc_req aux_roc_req = {
3045                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
3046                 .id_and_color =
3047                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
3048                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
3049                 /* Set the channel info data */
3050                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
3051                         PHY_BAND_24 : PHY_BAND_5,
3052                 .channel_info.channel = channel->hw_value,
3053                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
3054                 /* Set the time and duration */
3055                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
3056          };
3057
3058         delay = AUX_ROC_MIN_DELAY;
3059         req_dur = MSEC_TO_TU(duration);
3060
3061         /*
3062          * If we are associated we want the delay time to be at least one
3063          * dtim interval so that the FW can wait until after the DTIM and
3064          * then start the time event, this will potentially allow us to
3065          * remain off-channel for the max duration.
3066          * Since we want to use almost a whole dtim interval we would also
3067          * like the delay to be for 2-3 dtim intervals, in case there are
3068          * other time events with higher priority.
3069          */
3070         if (vif->bss_conf.assoc) {
3071                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
3072                 /* We cannot remain off-channel longer than the DTIM interval */
3073                 if (dtim_interval <= req_dur) {
3074                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
3075                         if (req_dur <= AUX_ROC_MIN_DURATION)
3076                                 req_dur = dtim_interval -
3077                                         AUX_ROC_MIN_SAFETY_BUFFER;
3078                 }
3079         }
3080
3081         aux_roc_req.duration = cpu_to_le32(req_dur);
3082         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
3083
3084         IWL_DEBUG_TE(mvm,
3085                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
3086                      channel->hw_value, req_dur, duration, delay,
3087                      dtim_interval);
3088         /* Set the node address */
3089         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3090
3091         lockdep_assert_held(&mvm->mutex);
3092
3093         spin_lock_bh(&mvm->time_event_lock);
3094
3095         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3096                 spin_unlock_bh(&mvm->time_event_lock);
3097                 return -EIO;
3098         }
3099
3100         te_data->vif = vif;
3101         te_data->duration = duration;
3102         te_data->id = HOT_SPOT_CMD;
3103
3104         spin_unlock_bh(&mvm->time_event_lock);
3105
3106         /*
3107          * Use a notification wait, which really just processes the
3108          * command response and doesn't wait for anything, in order
3109          * to be able to process the response and get the UID inside
3110          * the RX path. Using CMD_WANT_SKB doesn't work because it
3111          * stores the buffer and then wakes up this thread, by which
3112          * time another notification (that the time event started)
3113          * might already be processed unsuccessfully.
3114          */
3115         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3116                                    time_event_response,
3117                                    ARRAY_SIZE(time_event_response),
3118                                    iwl_mvm_rx_aux_roc, te_data);
3119
3120         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3121                                    &aux_roc_req);
3122
3123         if (res) {
3124                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3125                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3126                 goto out_clear_te;
3127         }
3128
3129         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3130         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3131         /* should never fail */
3132         WARN_ON_ONCE(res);
3133
3134         if (res) {
3135  out_clear_te:
3136                 spin_lock_bh(&mvm->time_event_lock);
3137                 iwl_mvm_te_clear_data(mvm, te_data);
3138                 spin_unlock_bh(&mvm->time_event_lock);
3139         }
3140
3141         return res;
3142 }
3143
3144 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3145                        struct ieee80211_vif *vif,
3146                        struct ieee80211_channel *channel,
3147                        int duration,
3148                        enum ieee80211_roc_type type)
3149 {
3150         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3151         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3152         struct cfg80211_chan_def chandef;
3153         struct iwl_mvm_phy_ctxt *phy_ctxt;
3154         int ret, i;
3155
3156         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3157                            duration, type);
3158
3159         flush_work(&mvm->roc_done_wk);
3160
3161         mutex_lock(&mvm->mutex);
3162
3163         switch (vif->type) {
3164         case NL80211_IFTYPE_STATION:
3165                 if (fw_has_capa(&mvm->fw->ucode_capa,
3166                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3167                         /* Use aux roc framework (HS20) */
3168                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3169                                                        vif, duration);
3170                         goto out_unlock;
3171                 }
3172                 IWL_ERR(mvm, "hotspot not supported\n");
3173                 ret = -EINVAL;
3174                 goto out_unlock;
3175         case NL80211_IFTYPE_P2P_DEVICE:
3176                 /* handle below */
3177                 break;
3178         default:
3179                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3180                 ret = -EINVAL;
3181                 goto out_unlock;
3182         }
3183
3184         for (i = 0; i < NUM_PHY_CTX; i++) {
3185                 phy_ctxt = &mvm->phy_ctxts[i];
3186                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3187                         continue;
3188
3189                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3190                         /*
3191                          * Unbind the P2P_DEVICE from the current PHY context,
3192                          * and if the PHY context is not used remove it.
3193                          */
3194                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3195                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3196                                 goto out_unlock;
3197
3198                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3199
3200                         /* Bind the P2P_DEVICE to the current PHY Context */
3201                         mvmvif->phy_ctxt = phy_ctxt;
3202
3203                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3204                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3205                                 goto out_unlock;
3206
3207                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3208                         goto schedule_time_event;
3209                 }
3210         }
3211
3212         /* Need to update the PHY context only if the ROC channel changed */
3213         if (channel == mvmvif->phy_ctxt->channel)
3214                 goto schedule_time_event;
3215
3216         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3217
3218         /*
3219          * Change the PHY context configuration as it is currently referenced
3220          * only by the P2P Device MAC
3221          */
3222         if (mvmvif->phy_ctxt->ref == 1) {
3223                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3224                                                &chandef, 1, 1);
3225                 if (ret)
3226                         goto out_unlock;
3227         } else {
3228                 /*
3229                  * The PHY context is shared with other MACs. Need to remove the
3230                  * P2P Device from the binding, allocate an new PHY context and
3231                  * create a new binding
3232                  */
3233                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3234                 if (!phy_ctxt) {
3235                         ret = -ENOSPC;
3236                         goto out_unlock;
3237                 }
3238
3239                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3240                                                1, 1);
3241                 if (ret) {
3242                         IWL_ERR(mvm, "Failed to change PHY context\n");
3243                         goto out_unlock;
3244                 }
3245
3246                 /* Unbind the P2P_DEVICE from the current PHY context */
3247                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3248                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3249                         goto out_unlock;
3250
3251                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3252
3253                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3254                 mvmvif->phy_ctxt = phy_ctxt;
3255
3256                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3257                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3258                         goto out_unlock;
3259
3260                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3261         }
3262
3263 schedule_time_event:
3264         /* Schedule the time events */
3265         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3266
3267 out_unlock:
3268         mutex_unlock(&mvm->mutex);
3269         IWL_DEBUG_MAC80211(mvm, "leave\n");
3270         return ret;
3271 }
3272
3273 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3274 {
3275         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3276
3277         IWL_DEBUG_MAC80211(mvm, "enter\n");
3278
3279         mutex_lock(&mvm->mutex);
3280         iwl_mvm_stop_roc(mvm);
3281         mutex_unlock(&mvm->mutex);
3282
3283         IWL_DEBUG_MAC80211(mvm, "leave\n");
3284         return 0;
3285 }
3286
3287 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3288                                  struct ieee80211_chanctx_conf *ctx)
3289 {
3290         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3291         struct iwl_mvm_phy_ctxt *phy_ctxt;
3292         int ret;
3293
3294         lockdep_assert_held(&mvm->mutex);
3295
3296         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3297
3298         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3299         if (!phy_ctxt) {
3300                 ret = -ENOSPC;
3301                 goto out;
3302         }
3303
3304         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3305                                        ctx->rx_chains_static,
3306                                        ctx->rx_chains_dynamic);
3307         if (ret) {
3308                 IWL_ERR(mvm, "Failed to add PHY context\n");
3309                 goto out;
3310         }
3311
3312         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3313         *phy_ctxt_id = phy_ctxt->id;
3314 out:
3315         return ret;
3316 }
3317
3318 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3319                                struct ieee80211_chanctx_conf *ctx)
3320 {
3321         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3322         int ret;
3323
3324         mutex_lock(&mvm->mutex);
3325         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3326         mutex_unlock(&mvm->mutex);
3327
3328         return ret;
3329 }
3330
3331 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3332                                      struct ieee80211_chanctx_conf *ctx)
3333 {
3334         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3335         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3336
3337         lockdep_assert_held(&mvm->mutex);
3338
3339         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3340 }
3341
3342 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3343                                    struct ieee80211_chanctx_conf *ctx)
3344 {
3345         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3346
3347         mutex_lock(&mvm->mutex);
3348         __iwl_mvm_remove_chanctx(mvm, ctx);
3349         mutex_unlock(&mvm->mutex);
3350 }
3351
3352 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3353                                    struct ieee80211_chanctx_conf *ctx,
3354                                    u32 changed)
3355 {
3356         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3357         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3358         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3359
3360         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3361                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3362                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3363                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3364                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3365                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3366                       phy_ctxt->ref, changed))
3367                 return;
3368
3369         mutex_lock(&mvm->mutex);
3370         iwl_mvm_bt_coex_vif_change(mvm);
3371         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3372                                  ctx->rx_chains_static,
3373                                  ctx->rx_chains_dynamic);
3374         mutex_unlock(&mvm->mutex);
3375 }
3376
3377 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3378                                         struct ieee80211_vif *vif,
3379                                         struct ieee80211_chanctx_conf *ctx,
3380                                         bool switching_chanctx)
3381 {
3382         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3383         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3384         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3385         int ret;
3386
3387         lockdep_assert_held(&mvm->mutex);
3388
3389         mvmvif->phy_ctxt = phy_ctxt;
3390
3391         switch (vif->type) {
3392         case NL80211_IFTYPE_AP:
3393                 /* only needed if we're switching chanctx (i.e. during CSA) */
3394                 if (switching_chanctx) {
3395                         mvmvif->ap_ibss_active = true;
3396                         break;
3397                 }
3398         case NL80211_IFTYPE_ADHOC:
3399                 /*
3400                  * The AP binding flow is handled as part of the start_ap flow
3401                  * (in bss_info_changed), similarly for IBSS.
3402                  */
3403                 ret = 0;
3404                 goto out;
3405         case NL80211_IFTYPE_STATION:
3406                 break;
3407         case NL80211_IFTYPE_MONITOR:
3408                 /* always disable PS when a monitor interface is active */
3409                 mvmvif->ps_disabled = true;
3410                 break;
3411         default:
3412                 ret = -EINVAL;
3413                 goto out;
3414         }
3415
3416         ret = iwl_mvm_binding_add_vif(mvm, vif);
3417         if (ret)
3418                 goto out;
3419
3420         /*
3421          * Power state must be updated before quotas,
3422          * otherwise fw will complain.
3423          */
3424         iwl_mvm_power_update_mac(mvm);
3425
3426         /* Setting the quota at this stage is only required for monitor
3427          * interfaces. For the other types, the bss_info changed flow
3428          * will handle quota settings.
3429          */
3430         if (vif->type == NL80211_IFTYPE_MONITOR) {
3431                 mvmvif->monitor_active = true;
3432                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3433                 if (ret)
3434                         goto out_remove_binding;
3435
3436                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3437                 if (ret)
3438                         goto out_remove_binding;
3439
3440         }
3441
3442         /* Handle binding during CSA */
3443         if (vif->type == NL80211_IFTYPE_AP) {
3444                 iwl_mvm_update_quotas(mvm, false, NULL);
3445                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3446         }
3447
3448         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3449                 u32 duration = 2 * vif->bss_conf.beacon_int;
3450
3451                 /* iwl_mvm_protect_session() reads directly from the
3452                  * device (the system time), so make sure it is
3453                  * available.
3454                  */
3455                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3456                 if (ret)
3457                         goto out_remove_binding;
3458
3459                 /* Protect the session to make sure we hear the first
3460                  * beacon on the new channel.
3461                  */
3462                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3463                                         vif->bss_conf.beacon_int / 2,
3464                                         true);
3465
3466                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3467
3468                 iwl_mvm_update_quotas(mvm, false, NULL);
3469         }
3470
3471         goto out;
3472
3473 out_remove_binding:
3474         iwl_mvm_binding_remove_vif(mvm, vif);
3475         iwl_mvm_power_update_mac(mvm);
3476 out:
3477         if (ret)
3478                 mvmvif->phy_ctxt = NULL;
3479         return ret;
3480 }
3481 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3482                                       struct ieee80211_vif *vif,
3483                                       struct ieee80211_chanctx_conf *ctx)
3484 {
3485         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3486         int ret;
3487
3488         mutex_lock(&mvm->mutex);
3489         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3490         mutex_unlock(&mvm->mutex);
3491
3492         return ret;
3493 }
3494
3495 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3496                                            struct ieee80211_vif *vif,
3497                                            struct ieee80211_chanctx_conf *ctx,
3498                                            bool switching_chanctx)
3499 {
3500         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3501         struct ieee80211_vif *disabled_vif = NULL;
3502
3503         lockdep_assert_held(&mvm->mutex);
3504
3505         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3506
3507         switch (vif->type) {
3508         case NL80211_IFTYPE_ADHOC:
3509                 goto out;
3510         case NL80211_IFTYPE_MONITOR:
3511                 mvmvif->monitor_active = false;
3512                 mvmvif->ps_disabled = false;
3513                 iwl_mvm_rm_snif_sta(mvm, vif);
3514                 break;
3515         case NL80211_IFTYPE_AP:
3516                 /* This part is triggered only during CSA */
3517                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3518                         goto out;
3519
3520                 mvmvif->csa_countdown = false;
3521
3522                 /* Set CS bit on all the stations */
3523                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3524
3525                 /* Save blocked iface, the timeout is set on the next beacon */
3526                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3527
3528                 mvmvif->ap_ibss_active = false;
3529                 break;
3530         case NL80211_IFTYPE_STATION:
3531                 if (!switching_chanctx)
3532                         break;
3533
3534                 disabled_vif = vif;
3535
3536                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3537                 break;
3538         default:
3539                 break;
3540         }
3541
3542         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3543         iwl_mvm_binding_remove_vif(mvm, vif);
3544
3545 out:
3546         mvmvif->phy_ctxt = NULL;
3547         iwl_mvm_power_update_mac(mvm);
3548 }
3549
3550 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3551                                          struct ieee80211_vif *vif,
3552                                          struct ieee80211_chanctx_conf *ctx)
3553 {
3554         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3555
3556         mutex_lock(&mvm->mutex);
3557         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3558         mutex_unlock(&mvm->mutex);
3559 }
3560
3561 static int
3562 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3563                                 struct ieee80211_vif_chanctx_switch *vifs)
3564 {
3565         int ret;
3566
3567         mutex_lock(&mvm->mutex);
3568         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3569         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3570
3571         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3572         if (ret) {
3573                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3574                 goto out_reassign;
3575         }
3576
3577         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3578                                            true);
3579         if (ret) {
3580                 IWL_ERR(mvm,
3581                         "failed to assign new_ctx during channel switch\n");
3582                 goto out_remove;
3583         }
3584
3585         /* we don't support TDLS during DCM - can be caused by channel switch */
3586         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3587                 iwl_mvm_teardown_tdls_peers(mvm);
3588
3589         goto out;
3590
3591 out_remove:
3592         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3593
3594 out_reassign:
3595         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3596                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3597                 goto out_restart;
3598         }
3599
3600         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3601                                          true)) {
3602                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3603                 goto out_restart;
3604         }
3605
3606         goto out;
3607
3608 out_restart:
3609         /* things keep failing, better restart the hw */
3610         iwl_mvm_nic_restart(mvm, false);
3611
3612 out:
3613         mutex_unlock(&mvm->mutex);
3614
3615         return ret;
3616 }
3617
3618 static int
3619 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3620                                     struct ieee80211_vif_chanctx_switch *vifs)
3621 {
3622         int ret;
3623
3624         mutex_lock(&mvm->mutex);
3625         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3626
3627         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3628                                            true);
3629         if (ret) {
3630                 IWL_ERR(mvm,
3631                         "failed to assign new_ctx during channel switch\n");
3632                 goto out_reassign;
3633         }
3634
3635         goto out;
3636
3637 out_reassign:
3638         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3639                                          true)) {
3640                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3641                 goto out_restart;
3642         }
3643
3644         goto out;
3645
3646 out_restart:
3647         /* things keep failing, better restart the hw */
3648         iwl_mvm_nic_restart(mvm, false);
3649
3650 out:
3651         mutex_unlock(&mvm->mutex);
3652
3653         return ret;
3654 }
3655
3656 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3657                                       struct ieee80211_vif_chanctx_switch *vifs,
3658                                       int n_vifs,
3659                                       enum ieee80211_chanctx_switch_mode mode)
3660 {
3661         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3662         int ret;
3663
3664         /* we only support a single-vif right now */
3665         if (n_vifs > 1)
3666                 return -EOPNOTSUPP;
3667
3668         switch (mode) {
3669         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3670                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3671                 break;
3672         case CHANCTX_SWMODE_REASSIGN_VIF:
3673                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3674                 break;
3675         default:
3676                 ret = -EOPNOTSUPP;
3677                 break;
3678         }
3679
3680         return ret;
3681 }
3682
3683 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3684                            struct ieee80211_sta *sta,
3685                            bool set)
3686 {
3687         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3688         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3689
3690         if (!mvm_sta || !mvm_sta->vif) {
3691                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3692                 return -EINVAL;
3693         }
3694
3695         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3696 }
3697
3698 #ifdef CONFIG_NL80211_TESTMODE
3699 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3700         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3701         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3702         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3703 };
3704
3705 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3706                                       struct ieee80211_vif *vif,
3707                                       void *data, int len)
3708 {
3709         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3710         int err;
3711         u32 noa_duration;
3712
3713         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3714         if (err)
3715                 return err;
3716
3717         if (!tb[IWL_MVM_TM_ATTR_CMD])
3718                 return -EINVAL;
3719
3720         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3721         case IWL_MVM_TM_CMD_SET_NOA:
3722                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3723                     !vif->bss_conf.enable_beacon ||
3724                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3725                         return -EINVAL;
3726
3727                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3728                 if (noa_duration >= vif->bss_conf.beacon_int)
3729                         return -EINVAL;
3730
3731                 mvm->noa_duration = noa_duration;
3732                 mvm->noa_vif = vif;
3733
3734                 return iwl_mvm_update_quotas(mvm, false, NULL);
3735         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3736                 /* must be associated client vif - ignore authorized */
3737                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3738                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3739                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3740                         return -EINVAL;
3741
3742                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3743                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3744                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3745         }
3746
3747         return -EOPNOTSUPP;
3748 }
3749
3750 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3751                                     struct ieee80211_vif *vif,
3752                                     void *data, int len)
3753 {
3754         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3755         int err;
3756
3757         mutex_lock(&mvm->mutex);
3758         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3759         mutex_unlock(&mvm->mutex);
3760
3761         return err;
3762 }
3763 #endif
3764
3765 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3766                                    struct ieee80211_vif *vif,
3767                                    struct ieee80211_channel_switch *chsw)
3768 {
3769         /* By implementing this operation, we prevent mac80211 from
3770          * starting its own channel switch timer, so that we can call
3771          * ieee80211_chswitch_done() ourselves at the right time
3772          * (which is when the absence time event starts).
3773          */
3774
3775         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3776                            "dummy channel switch op\n");
3777 }
3778
3779 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3780                                       struct ieee80211_vif *vif,
3781                                       struct ieee80211_channel_switch *chsw)
3782 {
3783         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3784         struct ieee80211_vif *csa_vif;
3785         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3786         u32 apply_time;
3787         int ret;
3788
3789         mutex_lock(&mvm->mutex);
3790
3791         mvmvif->csa_failed = false;
3792
3793         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3794                            chsw->chandef.center_freq1);
3795
3796         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3797
3798         switch (vif->type) {
3799         case NL80211_IFTYPE_AP:
3800                 csa_vif =
3801                         rcu_dereference_protected(mvm->csa_vif,
3802                                                   lockdep_is_held(&mvm->mutex));
3803                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3804                               "Another CSA is already in progress")) {
3805                         ret = -EBUSY;
3806                         goto out_unlock;
3807                 }
3808
3809                 /* we still didn't unblock tx. prevent new CS meanwhile */
3810                 if (rcu_dereference_protected(mvm->csa_tx_blocked_vif,
3811                                               lockdep_is_held(&mvm->mutex))) {
3812                         ret = -EBUSY;
3813                         goto out_unlock;
3814                 }
3815
3816                 rcu_assign_pointer(mvm->csa_vif, vif);
3817
3818                 if (WARN_ONCE(mvmvif->csa_countdown,
3819                               "Previous CSA countdown didn't complete")) {
3820                         ret = -EBUSY;
3821                         goto out_unlock;
3822                 }
3823
3824                 mvmvif->csa_target_freq = chsw->chandef.chan->center_freq;
3825
3826                 break;
3827         case NL80211_IFTYPE_STATION:
3828                 if (mvmvif->lqm_active)
3829                         iwl_mvm_send_lqm_cmd(vif,
3830                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3831                                              0, 0);
3832
3833                 /* Schedule the time event to a bit before beacon 1,
3834                  * to make sure we're in the new channel when the
3835                  * GO/AP arrives.
3836                  */
3837                 apply_time = chsw->device_timestamp +
3838                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3839                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3840
3841                 if (chsw->block_tx)
3842                         iwl_mvm_csa_client_absent(mvm, vif);
3843
3844                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3845                                             apply_time);
3846                 if (mvmvif->bf_data.bf_enabled) {
3847                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3848                         if (ret)
3849                                 goto out_unlock;
3850                 }
3851
3852                 break;
3853         default:
3854                 break;
3855         }
3856
3857         mvmvif->ps_disabled = true;
3858
3859         ret = iwl_mvm_power_update_ps(mvm);
3860         if (ret)
3861                 goto out_unlock;
3862
3863         /* we won't be on this channel any longer */
3864         iwl_mvm_teardown_tdls_peers(mvm);
3865
3866 out_unlock:
3867         mutex_unlock(&mvm->mutex);
3868
3869         return ret;
3870 }
3871
3872 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3873                                        struct ieee80211_vif *vif)
3874 {
3875         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3876         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3877         int ret;
3878
3879         mutex_lock(&mvm->mutex);
3880
3881         if (mvmvif->csa_failed) {
3882                 mvmvif->csa_failed = false;
3883                 ret = -EIO;
3884                 goto out_unlock;
3885         }
3886
3887         if (vif->type == NL80211_IFTYPE_STATION) {
3888                 struct iwl_mvm_sta *mvmsta;
3889
3890                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3891                                                           mvmvif->ap_sta_id);
3892
3893                 if (WARN_ON(!mvmsta)) {
3894                         ret = -EIO;
3895                         goto out_unlock;
3896                 }
3897
3898                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3899
3900                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3901
3902                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3903                 if (ret)
3904                         goto out_unlock;
3905
3906                 iwl_mvm_stop_session_protection(mvm, vif);
3907         }
3908
3909         mvmvif->ps_disabled = false;
3910
3911         ret = iwl_mvm_power_update_ps(mvm);
3912
3913 out_unlock:
3914         mutex_unlock(&mvm->mutex);
3915
3916         return ret;
3917 }
3918
3919 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3920                               struct ieee80211_vif *vif, u32 queues, bool drop)
3921 {
3922         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3923         struct iwl_mvm_vif *mvmvif;
3924         struct iwl_mvm_sta *mvmsta;
3925         struct ieee80211_sta *sta;
3926         int i;
3927         u32 msk = 0;
3928
3929         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3930                 return;
3931
3932         /* Make sure we're done with the deferred traffic before flushing */
3933         if (iwl_mvm_is_dqa_supported(mvm))
3934                 flush_work(&mvm->add_stream_wk);
3935
3936         mutex_lock(&mvm->mutex);
3937         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3938
3939         /* flush the AP-station and all TDLS peers */
3940         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3941                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3942                                                 lockdep_is_held(&mvm->mutex));
3943                 if (IS_ERR_OR_NULL(sta))
3944                         continue;
3945
3946                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3947                 if (mvmsta->vif != vif)
3948                         continue;
3949
3950                 /* make sure only TDLS peers or the AP are flushed */
3951                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3952
3953                 msk |= mvmsta->tfd_queue_msk;
3954         }
3955
3956         if (drop) {
3957                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3958                         IWL_ERR(mvm, "flush request fail\n");
3959                 mutex_unlock(&mvm->mutex);
3960         } else {
3961                 mutex_unlock(&mvm->mutex);
3962
3963                 /* this can take a while, and we may need/want other operations
3964                  * to succeed while doing this, so do it without the mutex held
3965                  */
3966                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3967         }
3968 }
3969
3970 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3971                                   struct survey_info *survey)
3972 {
3973         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3974         int ret;
3975
3976         memset(survey, 0, sizeof(*survey));
3977
3978         /* only support global statistics right now */
3979         if (idx != 0)
3980                 return -ENOENT;
3981
3982         if (!fw_has_capa(&mvm->fw->ucode_capa,
3983                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3984                 return -ENOENT;
3985
3986         mutex_lock(&mvm->mutex);
3987
3988         if (mvm->ucode_loaded) {
3989                 ret = iwl_mvm_request_statistics(mvm, false);
3990                 if (ret)
3991                         goto out;
3992         }
3993
3994         survey->filled = SURVEY_INFO_TIME |
3995                          SURVEY_INFO_TIME_RX |
3996                          SURVEY_INFO_TIME_TX |
3997                          SURVEY_INFO_TIME_SCAN;
3998         survey->time = mvm->accu_radio_stats.on_time_rf +
3999                        mvm->radio_stats.on_time_rf;
4000         do_div(survey->time, USEC_PER_MSEC);
4001
4002         survey->time_rx = mvm->accu_radio_stats.rx_time +
4003                           mvm->radio_stats.rx_time;
4004         do_div(survey->time_rx, USEC_PER_MSEC);
4005
4006         survey->time_tx = mvm->accu_radio_stats.tx_time +
4007                           mvm->radio_stats.tx_time;
4008         do_div(survey->time_tx, USEC_PER_MSEC);
4009
4010         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
4011                             mvm->radio_stats.on_time_scan;
4012         do_div(survey->time_scan, USEC_PER_MSEC);
4013
4014         ret = 0;
4015  out:
4016         mutex_unlock(&mvm->mutex);
4017         return ret;
4018 }
4019
4020 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
4021                                        struct ieee80211_vif *vif,
4022                                        struct ieee80211_sta *sta,
4023                                        struct station_info *sinfo)
4024 {
4025         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4026         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4027         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4028
4029         if (mvmsta->avg_energy) {
4030                 sinfo->signal_avg = mvmsta->avg_energy;
4031                 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
4032         }
4033
4034         if (!fw_has_capa(&mvm->fw->ucode_capa,
4035                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
4036                 return;
4037
4038         /* if beacon filtering isn't on mac80211 does it anyway */
4039         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
4040                 return;
4041
4042         if (!vif->bss_conf.assoc)
4043                 return;
4044
4045         mutex_lock(&mvm->mutex);
4046
4047         if (mvmvif->ap_sta_id != mvmsta->sta_id)
4048                 goto unlock;
4049
4050         if (iwl_mvm_request_statistics(mvm, false))
4051                 goto unlock;
4052
4053         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
4054                            mvmvif->beacon_stats.accu_num_beacons;
4055         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
4056         if (mvmvif->beacon_stats.avg_signal) {
4057                 /* firmware only reports a value after RXing a few beacons */
4058                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
4059                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
4060         }
4061  unlock:
4062         mutex_unlock(&mvm->mutex);
4063 }
4064
4065 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4066                                         struct ieee80211_vif *vif,
4067                                         const struct ieee80211_event *event)
4068 {
4069 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4070         do {                                                    \
4071                 if ((_cnt) && --(_cnt))                         \
4072                         break;                                  \
4073                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4074         } while (0)
4075
4076         struct iwl_fw_dbg_trigger_tlv *trig;
4077         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4078
4079         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4080                 return;
4081
4082         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4083         trig_mlme = (void *)trig->data;
4084         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4085                 return;
4086
4087         if (event->u.mlme.data == ASSOC_EVENT) {
4088                 if (event->u.mlme.status == MLME_DENIED)
4089                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4090                                            trig_mlme->stop_assoc_denied,
4091                                            "DENIED ASSOC: reason %d",
4092                                             event->u.mlme.reason);
4093                 else if (event->u.mlme.status == MLME_TIMEOUT)
4094                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4095                                            trig_mlme->stop_assoc_timeout,
4096                                            "ASSOC TIMEOUT");
4097         } else if (event->u.mlme.data == AUTH_EVENT) {
4098                 if (event->u.mlme.status == MLME_DENIED)
4099                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4100                                            trig_mlme->stop_auth_denied,
4101                                            "DENIED AUTH: reason %d",
4102                                            event->u.mlme.reason);
4103                 else if (event->u.mlme.status == MLME_TIMEOUT)
4104                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4105                                            trig_mlme->stop_auth_timeout,
4106                                            "AUTH TIMEOUT");
4107         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4108                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4109                                    trig_mlme->stop_rx_deauth,
4110                                    "DEAUTH RX %d", event->u.mlme.reason);
4111         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4112                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4113                                    trig_mlme->stop_tx_deauth,
4114                                    "DEAUTH TX %d", event->u.mlme.reason);
4115         }
4116 #undef CHECK_MLME_TRIGGER
4117 }
4118
4119 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4120                                           struct ieee80211_vif *vif,
4121                                           const struct ieee80211_event *event)
4122 {
4123         struct iwl_fw_dbg_trigger_tlv *trig;
4124         struct iwl_fw_dbg_trigger_ba *ba_trig;
4125
4126         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4127                 return;
4128
4129         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4130         ba_trig = (void *)trig->data;
4131         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4132                 return;
4133
4134         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4135                 return;
4136
4137         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4138                                     "BAR received from %pM, tid %d, ssn %d",
4139                                     event->u.ba.sta->addr, event->u.ba.tid,
4140                                     event->u.ba.ssn);
4141 }
4142
4143 static void
4144 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4145                                      struct ieee80211_vif *vif,
4146                                      const struct ieee80211_event *event)
4147 {
4148         struct iwl_fw_dbg_trigger_tlv *trig;
4149         struct iwl_fw_dbg_trigger_ba *ba_trig;
4150
4151         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4152                 return;
4153
4154         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4155         ba_trig = (void *)trig->data;
4156         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4157                 return;
4158
4159         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4160                 return;
4161
4162         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4163                                     "Frame from %pM timed out, tid %d",
4164                                     event->u.ba.sta->addr, event->u.ba.tid);
4165 }
4166
4167 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4168                                        struct ieee80211_vif *vif,
4169                                        const struct ieee80211_event *event)
4170 {
4171         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4172
4173         switch (event->type) {
4174         case MLME_EVENT:
4175                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4176                 break;
4177         case BAR_RX_EVENT:
4178                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4179                 break;
4180         case BA_FRAME_TIMEOUT:
4181                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4182                 break;
4183         default:
4184                 break;
4185         }
4186 }
4187
4188 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4189                                      struct iwl_mvm_internal_rxq_notif *notif,
4190                                      u32 size)
4191 {
4192         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4193         int ret;
4194
4195         lockdep_assert_held(&mvm->mutex);
4196
4197         if (!iwl_mvm_has_new_rx_api(mvm))
4198                 return;
4199
4200         notif->cookie = mvm->queue_sync_cookie;
4201
4202         if (notif->sync)
4203                 atomic_set(&mvm->queue_sync_counter,
4204                            mvm->trans->num_rx_queues);
4205
4206         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4207         if (ret) {
4208                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4209                 goto out;
4210         }
4211
4212         if (notif->sync)
4213                 ret = wait_event_timeout(mvm->rx_sync_waitq,
4214                                          atomic_read(&mvm->queue_sync_counter) == 0,
4215                                          HZ);
4216         WARN_ON_ONCE(!ret);
4217
4218 out:
4219         atomic_set(&mvm->queue_sync_counter, 0);
4220         mvm->queue_sync_cookie++;
4221 }
4222
4223 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4224 {
4225         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4226         struct iwl_mvm_internal_rxq_notif data = {
4227                 .type = IWL_MVM_RXQ_EMPTY,
4228                 .sync = 1,
4229         };
4230
4231         mutex_lock(&mvm->mutex);
4232         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4233         mutex_unlock(&mvm->mutex);
4234 }
4235
4236 const struct ieee80211_ops iwl_mvm_hw_ops = {
4237         .tx = iwl_mvm_mac_tx,
4238         .ampdu_action = iwl_mvm_mac_ampdu_action,
4239         .start = iwl_mvm_mac_start,
4240         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4241         .stop = iwl_mvm_mac_stop,
4242         .add_interface = iwl_mvm_mac_add_interface,
4243         .remove_interface = iwl_mvm_mac_remove_interface,
4244         .config = iwl_mvm_mac_config,
4245         .prepare_multicast = iwl_mvm_prepare_multicast,
4246         .configure_filter = iwl_mvm_configure_filter,
4247         .config_iface_filter = iwl_mvm_config_iface_filter,
4248         .bss_info_changed = iwl_mvm_bss_info_changed,
4249         .hw_scan = iwl_mvm_mac_hw_scan,
4250         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4251         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4252         .sta_state = iwl_mvm_mac_sta_state,
4253         .sta_notify = iwl_mvm_mac_sta_notify,
4254         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4255         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4256         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4257         .sta_rc_update = iwl_mvm_sta_rc_update,
4258         .conf_tx = iwl_mvm_mac_conf_tx,
4259         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4260         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4261         .flush = iwl_mvm_mac_flush,
4262         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4263         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4264         .set_key = iwl_mvm_mac_set_key,
4265         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4266         .remain_on_channel = iwl_mvm_roc,
4267         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4268         .add_chanctx = iwl_mvm_add_chanctx,
4269         .remove_chanctx = iwl_mvm_remove_chanctx,
4270         .change_chanctx = iwl_mvm_change_chanctx,
4271         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4272         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4273         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4274
4275         .start_ap = iwl_mvm_start_ap_ibss,
4276         .stop_ap = iwl_mvm_stop_ap_ibss,
4277         .join_ibss = iwl_mvm_start_ap_ibss,
4278         .leave_ibss = iwl_mvm_stop_ap_ibss,
4279
4280         .set_tim = iwl_mvm_set_tim,
4281
4282         .channel_switch = iwl_mvm_channel_switch,
4283         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4284         .post_channel_switch = iwl_mvm_post_channel_switch,
4285
4286         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4287         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4288         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4289
4290         .event_callback = iwl_mvm_mac_event_callback,
4291
4292         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4293
4294         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4295
4296 #ifdef CONFIG_PM_SLEEP
4297         /* look at d3.c */
4298         .suspend = iwl_mvm_suspend,
4299         .resume = iwl_mvm_resume,
4300         .set_wakeup = iwl_mvm_set_wakeup,
4301         .set_rekey_data = iwl_mvm_set_rekey_data,
4302 #if IS_ENABLED(CONFIG_IPV6)
4303         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4304 #endif
4305         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4306 #endif
4307         .get_survey = iwl_mvm_mac_get_survey,
4308         .sta_statistics = iwl_mvm_mac_sta_statistics,
4309 };