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
 449         if (mvm->trans->num_rx_queues > 1)
 450                 ieee80211_hw_set(hw, USES_RSS);
 451
 452         if (mvm->trans->max_skb_frags)
 453                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 454
 455         if (!iwl_mvm_is_dqa_supported(mvm))
 456                 hw->queues = mvm->first_agg_queue;
 457         else
 458                 hw->queues = IEEE80211_MAX_QUEUES;
 459         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 460         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 461                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 462         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 463                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 464         hw->rate_control_algorithm = "iwl-mvm-rs";
 465         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 466         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 467
 468         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 4);
 469         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 470         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 471         hw->wiphy->cipher_suites = mvm->ciphers;
 472
 473         if (iwl_mvm_has_new_rx_api(mvm)) {
 474                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 475                         WLAN_CIPHER_SUITE_GCMP;
 476                 hw->wiphy->n_cipher_suites++;
 477                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 478                         WLAN_CIPHER_SUITE_GCMP_256;
 479                 hw->wiphy->n_cipher_suites++;
 480         }
 481
 482         /*
 483          * Enable 11w if advertised by firmware and software crypto
 484          * is not enabled (as the firmware will interpret some mgmt
 485          * packets, so enabling it with software crypto isn't safe)
 486          */
 487         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 488             !iwlwifi_mod_params.sw_crypto) {
 489                 ieee80211_hw_set(hw, MFP_CAPABLE);
 490                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 491                         WLAN_CIPHER_SUITE_AES_CMAC;
 492                 hw->wiphy->n_cipher_suites++;
 493         }
 494
 495         /* currently FW API supports only one optional cipher scheme */
 496         if (mvm->fw->cs[0].cipher) {
 497                 const struct iwl_fw_cipher_scheme *fwcs = &mvm->fw->cs[0];
 498                 struct ieee80211_cipher_scheme *cs = &mvm->cs[0];
 499
 500                 mvm->hw->n_cipher_schemes = 1;
 501
 502                 cs->cipher = le32_to_cpu(fwcs->cipher);
 503                 cs->iftype = BIT(NL80211_IFTYPE_STATION);
 504                 cs->hdr_len = fwcs->hdr_len;
 505                 cs->pn_len = fwcs->pn_len;
 506                 cs->pn_off = fwcs->pn_off;
 507                 cs->key_idx_off = fwcs->key_idx_off;
 508                 cs->key_idx_mask = fwcs->key_idx_mask;
 509                 cs->key_idx_shift = fwcs->key_idx_shift;
 510                 cs->mic_len = fwcs->mic_len;
 511
 512                 mvm->hw->cipher_schemes = mvm->cs;
 513                 mvm->ciphers[hw->wiphy->n_cipher_suites] = cs->cipher;
 514                 hw->wiphy->n_cipher_suites++;
 515         }
 516
 517         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 518         hw->wiphy->features |=
 519                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 520                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 521                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 522
 523         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 524         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 525         hw->chanctx_data_size = sizeof(u16);
 526
 527         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 528                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 529                 BIT(NL80211_IFTYPE_AP) |
 530                 BIT(NL80211_IFTYPE_P2P_GO) |
 531                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 532                 BIT(NL80211_IFTYPE_ADHOC);
 533
 534         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 535         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 536         if (iwl_mvm_is_lar_supported(mvm))
 537                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 538         else
 539                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 540                                                REGULATORY_DISABLE_BEACON_HINTS;
 541
 542         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 543                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 544
 545         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 546
 547         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 548         hw->wiphy->n_iface_combinations =
 549                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 550
 551         hw->wiphy->max_remain_on_channel_duration = 10000;
 552         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 553         /* we can compensate an offset of up to 3 channels = 15 MHz */
 554         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 555
 556         /* Extract MAC address */
 557         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 558         hw->wiphy->addresses = mvm->addresses;
 559         hw->wiphy->n_addresses = 1;
 560
 561         /* Extract additional MAC addresses if available */
 562         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 563                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 564
 565         for (i = 1; i < num_mac; i++) {
 566                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 567                        ETH_ALEN);
 568                 mvm->addresses[i].addr[5]++;
 569                 hw->wiphy->n_addresses++;
 570         }
 571
 572         iwl_mvm_reset_phy_ctxts(mvm);
 573
 574         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 575
 576         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 577
 578         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 579         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 580                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 581
 582         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 583                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 584         else
 585                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 586
 587         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 588                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 589                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 590         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 591                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 592                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 593
 594                 if (fw_has_capa(&mvm->fw->ucode_capa,
 595                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 596                     fw_has_api(&mvm->fw->ucode_capa,
 597                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 598                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 599                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 600         }
 601
 602         hw->wiphy->hw_version = mvm->trans->hw_id;
 603
 604         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 605                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 606         else
 607                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 608
 609         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 610         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 611         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 612         /* we create the 802.11 header and zero length SSID IE. */
 613         hw->wiphy->max_sched_scan_ie_len =
 614                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 615         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 616         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 617
 618         /*
 619          * the firmware uses u8 for num of iterations, but 0xff is saved for
 620          * infinite loop, so the maximum number of iterations is actually 254.
 621          */
 622         hw->wiphy->max_sched_scan_plan_iterations = 254;
 623
 624         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 625                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 626                                NL80211_FEATURE_P2P_GO_OPPPS |
 627                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
 628                                NL80211_FEATURE_DYNAMIC_SMPS |
 629                                NL80211_FEATURE_STATIC_SMPS |
 630                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 631
 632         if (fw_has_capa(&mvm->fw->ucode_capa,
 633                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 634                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 635         if (fw_has_capa(&mvm->fw->ucode_capa,
 636                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 637                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 638
 639         if (fw_has_capa(&mvm->fw->ucode_capa,
 640                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 641                 hw->wiphy->features |=
 642                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 643
 644         if (fw_has_capa(&mvm->fw->ucode_capa,
 645                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 646                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 647
 648         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 649
 650 #ifdef CONFIG_PM_SLEEP
 651         if (iwl_mvm_is_d0i3_supported(mvm) &&
 652             device_can_wakeup(mvm->trans->dev)) {
 653                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 654                 hw->wiphy->wowlan = &mvm->wowlan;
 655         }
 656
 657         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 658             mvm->trans->ops->d3_suspend &&
 659             mvm->trans->ops->d3_resume &&
 660             device_can_wakeup(mvm->trans->dev)) {
 661                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 662                                      WIPHY_WOWLAN_DISCONNECT |
 663                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 664                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 665                                      WIPHY_WOWLAN_NET_DETECT;
 666                 if (!iwlwifi_mod_params.sw_crypto)
 667                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 668                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 669                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 670
 671                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 672                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 673                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 674                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 675                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 676                 hw->wiphy->wowlan = &mvm->wowlan;
 677         }
 678 #endif
 679
 680 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 681         /* assign default bcast filtering configuration */
 682         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 683 #endif
 684
 685         ret = iwl_mvm_leds_init(mvm);
 686         if (ret)
 687                 return ret;
 688
 689         if (fw_has_capa(&mvm->fw->ucode_capa,
 690                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 691                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 692                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 693                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 694         }
 695
 696         if (fw_has_capa(&mvm->fw->ucode_capa,
 697                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 698                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 699                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 700         }
 701
 702         hw->netdev_features |= mvm->cfg->features;
 703         if (!iwl_mvm_is_csum_supported(mvm)) {
 704                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 705                                          NETIF_F_RXCSUM);
 706                 /* We may support SW TX CSUM */
 707                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 708                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 709         }
 710
 711         ret = ieee80211_register_hw(mvm->hw);
 712         if (ret)
 713                 iwl_mvm_leds_exit(mvm);
 714
 715         return ret;
 716 }
 717
 718 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 719                              struct ieee80211_sta *sta,
 720                              struct sk_buff *skb)
 721 {
 722         struct iwl_mvm_sta *mvmsta;
 723         bool defer = false;
 724
 725         /*
 726          * double check the IN_D0I3 flag both before and after
 727          * taking the spinlock, in order to prevent taking
 728          * the spinlock when not needed.
 729          */
 730         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 731                 return false;
 732
 733         spin_lock(&mvm->d0i3_tx_lock);
 734         /*
 735          * testing the flag again ensures the skb dequeue
 736          * loop (on d0i3 exit) hasn't run yet.
 737          */
 738         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 739                 goto out;
 740
 741         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 742         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 743             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 744                 goto out;
 745
 746         __skb_queue_tail(&mvm->d0i3_tx, skb);
 747         ieee80211_stop_queues(mvm->hw);
 748
 749         /* trigger wakeup */
 750         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 751         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 752
 753         defer = true;
 754 out:
 755         spin_unlock(&mvm->d0i3_tx_lock);
 756         return defer;
 757 }
 758
 759 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 760                            struct ieee80211_tx_control *control,
 761                            struct sk_buff *skb)
 762 {
 763         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 764         struct ieee80211_sta *sta = control->sta;
 765         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 766         struct ieee80211_hdr *hdr = (void *)skb->data;
 767
 768         if (iwl_mvm_is_radio_killed(mvm)) {
 769                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 770                 goto drop;
 771         }
 772
 773         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 774             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 775             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 776                 goto drop;
 777
 778         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 779         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 780                      ieee80211_is_mgmt(hdr->frame_control) &&
 781                      !ieee80211_is_deauth(hdr->frame_control) &&
 782                      !ieee80211_is_disassoc(hdr->frame_control) &&
 783                      !ieee80211_is_action(hdr->frame_control)))
 784                 sta = NULL;
 785
 786         if (sta) {
 787                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 788                         return;
 789                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 790                         goto drop;
 791                 return;
 792         }
 793
 794         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 795                 goto drop;
 796         return;
 797  drop:
 798         ieee80211_free_txskb(hw, skb);
 799 }
 800
 801 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 802 {
 803         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 804                 return false;
 805         return true;
 806 }
 807
 808 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 809 {
 810         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 811                 return false;
 812         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 813                 return true;
 814
 815         /* enabled by default */
 816         return true;
 817 }
 818
 819 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 820         do {                                                    \
 821                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 822                         break;                                  \
 823                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 824         } while (0)
 825
 826 static void
 827 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 828                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 829                             enum ieee80211_ampdu_mlme_action action)
 830 {
 831         struct iwl_fw_dbg_trigger_tlv *trig;
 832         struct iwl_fw_dbg_trigger_ba *ba_trig;
 833
 834         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 835                 return;
 836
 837         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 838         ba_trig = (void *)trig->data;
 839
 840         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 841                 return;
 842
 843         switch (action) {
 844         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 845                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 846                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 847
 848                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 849                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 850                                  sta->addr, tid, tid_data->ssn);
 851                 break;
 852                 }
 853         case IEEE80211_AMPDU_TX_STOP_CONT:
 854                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 855                                  "TX AGG STOP: MAC %pM tid %d\n",
 856                                  sta->addr, tid);
 857                 break;
 858         case IEEE80211_AMPDU_RX_START:
 859                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 860                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 861                                  sta->addr, tid, rx_ba_ssn);
 862                 break;
 863         case IEEE80211_AMPDU_RX_STOP:
 864                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 865                                  "RX AGG STOP: MAC %pM tid %d\n",
 866                                  sta->addr, tid);
 867                 break;
 868         default:
 869                 break;
 870         }
 871 }
 872
 873 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 874                                     struct ieee80211_vif *vif,
 875                                     struct ieee80211_ampdu_params *params)
 876 {
 877         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 878         int ret;
 879         bool tx_agg_ref = false;
 880         struct ieee80211_sta *sta = params->sta;
 881         enum ieee80211_ampdu_mlme_action action = params->action;
 882         u16 tid = params->tid;
 883         u16 *ssn = &params->ssn;
 884         u8 buf_size = params->buf_size;
 885         bool amsdu = params->amsdu;
 886         u16 timeout = params->timeout;
 887
 888         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 889                      sta->addr, tid, action);
 890
 891         if (!(mvm->nvm_data->sku_cap_11n_enable))
 892                 return -EACCES;
 893
 894         /* return from D0i3 before starting a new Tx aggregation */
 895         switch (action) {
 896         case IEEE80211_AMPDU_TX_START:
 897         case IEEE80211_AMPDU_TX_STOP_CONT:
 898         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 899         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 900         case IEEE80211_AMPDU_TX_OPERATIONAL:
 901                 /*
 902                  * for tx start, wait synchronously until D0i3 exit to
 903                  * get the correct sequence number for the tid.
 904                  * additionally, some other ampdu actions use direct
 905                  * target access, which is not handled automatically
 906                  * by the trans layer (unlike commands), so wait for
 907                  * d0i3 exit in these cases as well.
 908                  */
 909                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 910                 if (ret)
 911                         return ret;
 912
 913                 tx_agg_ref = true;
 914                 break;
 915         default:
 916                 break;
 917         }
 918
 919         mutex_lock(&mvm->mutex);
 920
 921         switch (action) {
 922         case IEEE80211_AMPDU_RX_START:
 923                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 924                         ret = -EINVAL;
 925                         break;
 926                 }
 927                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 928                                          timeout);
 929                 break;
 930         case IEEE80211_AMPDU_RX_STOP:
 931                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 932                                          timeout);
 933                 break;
 934         case IEEE80211_AMPDU_TX_START:
 935                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 936                         ret = -EINVAL;
 937                         break;
 938                 }
 939                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 940                 break;
 941         case IEEE80211_AMPDU_TX_STOP_CONT:
 942                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 943                 break;
 944         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 945         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 946                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 947                 break;
 948         case IEEE80211_AMPDU_TX_OPERATIONAL:
 949                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 950                                               buf_size, amsdu);
 951                 break;
 952         default:
 953                 WARN_ON_ONCE(1);
 954                 ret = -EINVAL;
 955                 break;
 956         }
 957
 958         if (!ret) {
 959                 u16 rx_ba_ssn = 0;
 960
 961                 if (action == IEEE80211_AMPDU_RX_START)
 962                         rx_ba_ssn = *ssn;
 963
 964                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 965                                             rx_ba_ssn, action);
 966         }
 967         mutex_unlock(&mvm->mutex);
 968
 969         /*
 970          * If the tid is marked as started, we won't use it for offloaded
 971          * traffic on the next D0i3 entry. It's safe to unref.
 972          */
 973         if (tx_agg_ref)
 974                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 975
 976         return ret;
 977 }
 978
 979 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 980                                      struct ieee80211_vif *vif)
 981 {
 982         struct iwl_mvm *mvm = data;
 983         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 984
 985         mvmvif->uploaded = false;
 986         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 987
 988         spin_lock_bh(&mvm->time_event_lock);
 989         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 990         spin_unlock_bh(&mvm->time_event_lock);
 991
 992         mvmvif->phy_ctxt = NULL;
 993         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 994 }
 995
 996 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 997 {
 998         /* clear the D3 reconfig, we only need it to avoid dumping a
 999          * firmware coredump on reconfiguration, we shouldn't do that
1000          * on D3->D0 transition
1001          */
1002         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1003                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1004                 iwl_mvm_fw_error_dump(mvm);
1005         }
1006
1007         /* cleanup all stale references (scan, roc), but keep the
1008          * ucode_down ref until reconfig is complete
1009          */
1010         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1011
1012         iwl_mvm_stop_device(mvm);
1013
1014         mvm->scan_status = 0;
1015         mvm->ps_disabled = false;
1016         mvm->calibrating = false;
1017
1018         /* just in case one was running */
1019         iwl_mvm_cleanup_roc_te(mvm);
1020         ieee80211_remain_on_channel_expired(mvm->hw);
1021
1022         /*
1023          * cleanup all interfaces, even inactive ones, as some might have
1024          * gone down during the HW restart
1025          */
1026         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1027
1028         mvm->p2p_device_vif = NULL;
1029         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1030
1031         iwl_mvm_reset_phy_ctxts(mvm);
1032         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1033         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1034         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1035         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1036         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1037         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1038
1039         ieee80211_wake_queues(mvm->hw);
1040
1041         /* clear any stale d0i3 state */
1042         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1043
1044         mvm->vif_count = 0;
1045         mvm->rx_ba_sessions = 0;
1046         mvm->fw_dbg_conf = FW_DBG_INVALID;
1047
1048         /* keep statistics ticking */
1049         iwl_mvm_accu_radio_stats(mvm);
1050 }
1051
1052 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1053 {
1054         int ret;
1055
1056         lockdep_assert_held(&mvm->mutex);
1057
1058         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1059                 /* Clean up some internal and mac80211 state on restart */
1060                 iwl_mvm_restart_cleanup(mvm);
1061         } else {
1062                 /* Hold the reference to prevent runtime suspend while
1063                  * the start procedure runs.  It's a bit confusing
1064                  * that the UCODE_DOWN reference is taken, but it just
1065                  * means "UCODE is not UP yet". ( TODO: rename this
1066                  * reference).
1067                  */
1068                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1069         }
1070         ret = iwl_mvm_up(mvm);
1071
1072         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1073                 /* Something went wrong - we need to finish some cleanup
1074                  * that normally iwl_mvm_mac_restart_complete() below
1075                  * would do.
1076                  */
1077                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1078                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1079         }
1080
1081         return ret;
1082 }
1083
1084 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1085 {
1086         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1087         int ret;
1088
1089         /* Some hw restart cleanups must not hold the mutex */
1090         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1091                 /*
1092                  * Make sure we are out of d0i3. This is needed
1093                  * to make sure the reference accounting is correct
1094                  * (and there is no stale d0i3_exit_work).
1095                  */
1096                 wait_event_timeout(mvm->d0i3_exit_waitq,
1097                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1098                                              &mvm->status),
1099                                    HZ);
1100         }
1101
1102         mutex_lock(&mvm->mutex);
1103         ret = __iwl_mvm_mac_start(mvm);
1104         mutex_unlock(&mvm->mutex);
1105
1106         return ret;
1107 }
1108
1109 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1110 {
1111         int ret;
1112
1113         mutex_lock(&mvm->mutex);
1114
1115         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1116         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1117         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1118         if (ret)
1119                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1120                         ret);
1121
1122         /* allow transport/FW low power modes */
1123         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1124
1125         /*
1126          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1127          * of packets the FW sent out, so we must reconnect.
1128          */
1129         iwl_mvm_teardown_tdls_peers(mvm);
1130
1131         mutex_unlock(&mvm->mutex);
1132 }
1133
1134 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1135 {
1136         if (iwl_mvm_is_d0i3_supported(mvm) &&
1137             iwl_mvm_enter_d0i3_on_suspend(mvm))
1138                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1139                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1140                                                         &mvm->status),
1141                                               HZ),
1142                           "D0i3 exit on resume timed out\n");
1143 }
1144
1145 static void
1146 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1147                               enum ieee80211_reconfig_type reconfig_type)
1148 {
1149         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1150
1151         switch (reconfig_type) {
1152         case IEEE80211_RECONFIG_TYPE_RESTART:
1153                 iwl_mvm_restart_complete(mvm);
1154                 break;
1155         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1156                 iwl_mvm_resume_complete(mvm);
1157                 break;
1158         }
1159 }
1160
1161 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1162 {
1163         lockdep_assert_held(&mvm->mutex);
1164
1165         /* firmware counters are obviously reset now, but we shouldn't
1166          * partially track so also clear the fw_reset_accu counters.
1167          */
1168         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1169
1170         /* async_handlers_wk is now blocked */
1171
1172         /*
1173          * The work item could be running or queued if the
1174          * ROC time event stops just as we get here.
1175          */
1176         flush_work(&mvm->roc_done_wk);
1177
1178         iwl_mvm_stop_device(mvm);
1179
1180         iwl_mvm_async_handlers_purge(mvm);
1181         /* async_handlers_list is empty and will stay empty: HW is stopped */
1182
1183         /* the fw is stopped, the aux sta is dead: clean up driver state */
1184         iwl_mvm_del_aux_sta(mvm);
1185
1186         iwl_free_fw_paging(mvm);
1187
1188         /*
1189          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1190          * won't be called in this case).
1191          * But make sure to cleanup interfaces that have gone down before/during
1192          * HW restart was requested.
1193          */
1194         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1195                 ieee80211_iterate_interfaces(mvm->hw, 0,
1196                                              iwl_mvm_cleanup_iterator, mvm);
1197
1198         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1199          * make sure there's nothing left there and warn if any is found.
1200          */
1201         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1202                 int i;
1203
1204                 for (i = 0; i < mvm->max_scans; i++) {
1205                         if (WARN_ONCE(mvm->scan_uid_status[i],
1206                                       "UMAC scan UID %d status was not cleaned\n",
1207                                       i))
1208                                 mvm->scan_uid_status[i] = 0;
1209                 }
1210         }
1211 }
1212
1213 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1214 {
1215         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1216
1217         flush_work(&mvm->d0i3_exit_work);
1218         flush_work(&mvm->async_handlers_wk);
1219         flush_work(&mvm->add_stream_wk);
1220         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1221         cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork);
1222         cancel_delayed_work_sync(&mvm->scan_timeout_dwork);
1223         iwl_mvm_free_fw_dump_desc(mvm);
1224
1225         mutex_lock(&mvm->mutex);
1226         __iwl_mvm_mac_stop(mvm);
1227         mutex_unlock(&mvm->mutex);
1228
1229         /*
1230          * The worker might have been waiting for the mutex, let it run and
1231          * discover that its list is now empty.
1232          */
1233         cancel_work_sync(&mvm->async_handlers_wk);
1234 }
1235
1236 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1237 {
1238         u16 i;
1239
1240         lockdep_assert_held(&mvm->mutex);
1241
1242         for (i = 0; i < NUM_PHY_CTX; i++)
1243                 if (!mvm->phy_ctxts[i].ref)
1244                         return &mvm->phy_ctxts[i];
1245
1246         IWL_ERR(mvm, "No available PHY context\n");
1247         return NULL;
1248 }
1249
1250 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1251                                 s16 tx_power)
1252 {
1253         struct iwl_dev_tx_power_cmd cmd = {
1254                 .v3.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1255                 .v3.v2.mac_context_id =
1256                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1257                 .v3.v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1258         };
1259         int len = sizeof(cmd);
1260
1261         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1262                 cmd.v3.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1263
1264         if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK))
1265                 len = sizeof(cmd.v3);
1266         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1267                 len = sizeof(cmd.v3.v2);
1268
1269         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1270 }
1271
1272 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1273                                      struct ieee80211_vif *vif)
1274 {
1275         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1276         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1277         int ret;
1278
1279         mvmvif->mvm = mvm;
1280
1281         /*
1282          * make sure D0i3 exit is completed, otherwise a target access
1283          * during tx queue configuration could be done when still in
1284          * D0i3 state.
1285          */
1286         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1287         if (ret)
1288                 return ret;
1289
1290         /*
1291          * Not much to do here. The stack will not allow interface
1292          * types or combinations that we didn't advertise, so we
1293          * don't really have to check the types.
1294          */
1295
1296         mutex_lock(&mvm->mutex);
1297
1298         /* make sure that beacon statistics don't go backwards with FW reset */
1299         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1300                 mvmvif->beacon_stats.accu_num_beacons +=
1301                         mvmvif->beacon_stats.num_beacons;
1302
1303         /* Allocate resources for the MAC context, and add it to the fw  */
1304         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1305         if (ret)
1306                 goto out_unlock;
1307
1308         /* Counting number of interfaces is needed for legacy PM */
1309         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1310                 mvm->vif_count++;
1311
1312         /*
1313          * The AP binding flow can be done only after the beacon
1314          * template is configured (which happens only in the mac80211
1315          * start_ap() flow), and adding the broadcast station can happen
1316          * only after the binding.
1317          * In addition, since modifying the MAC before adding a bcast
1318          * station is not allowed by the FW, delay the adding of MAC context to
1319          * the point where we can also add the bcast station.
1320          * In short: there's not much we can do at this point, other than
1321          * allocating resources :)
1322          */
1323         if (vif->type == NL80211_IFTYPE_AP ||
1324             vif->type == NL80211_IFTYPE_ADHOC) {
1325                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1326                 if (ret) {
1327                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1328                         goto out_release;
1329                 }
1330
1331                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1332                 goto out_unlock;
1333         }
1334
1335         mvmvif->features |= hw->netdev_features;
1336
1337         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1338         if (ret)
1339                 goto out_release;
1340
1341         ret = iwl_mvm_power_update_mac(mvm);
1342         if (ret)
1343                 goto out_remove_mac;
1344
1345         /* beacon filtering */
1346         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1347         if (ret)
1348                 goto out_remove_mac;
1349
1350         if (!mvm->bf_allowed_vif &&
1351             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1352                 mvm->bf_allowed_vif = mvmvif;
1353                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1354                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1355         }
1356
1357         /*
1358          * P2P_DEVICE interface does not have a channel context assigned to it,
1359          * so a dedicated PHY context is allocated to it and the corresponding
1360          * MAC context is bound to it at this stage.
1361          */
1362         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1363
1364                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1365                 if (!mvmvif->phy_ctxt) {
1366                         ret = -ENOSPC;
1367                         goto out_free_bf;
1368                 }
1369
1370                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1371                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1372                 if (ret)
1373                         goto out_unref_phy;
1374
1375                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1376                 if (ret)
1377                         goto out_unbind;
1378
1379                 /* Save a pointer to p2p device vif, so it can later be used to
1380                  * update the p2p device MAC when a GO is started/stopped */
1381                 mvm->p2p_device_vif = vif;
1382         }
1383
1384         iwl_mvm_vif_dbgfs_register(mvm, vif);
1385         goto out_unlock;
1386
1387  out_unbind:
1388         iwl_mvm_binding_remove_vif(mvm, vif);
1389  out_unref_phy:
1390         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1391  out_free_bf:
1392         if (mvm->bf_allowed_vif == mvmvif) {
1393                 mvm->bf_allowed_vif = NULL;
1394                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1395                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1396         }
1397  out_remove_mac:
1398         mvmvif->phy_ctxt = NULL;
1399         iwl_mvm_mac_ctxt_remove(mvm, vif);
1400  out_release:
1401         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1402                 mvm->vif_count--;
1403
1404         iwl_mvm_mac_ctxt_release(mvm, vif);
1405  out_unlock:
1406         mutex_unlock(&mvm->mutex);
1407
1408         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1409
1410         return ret;
1411 }
1412
1413 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1414                                         struct ieee80211_vif *vif)
1415 {
1416         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1417
1418         if (tfd_msk) {
1419                 /*
1420                  * mac80211 first removes all the stations of the vif and
1421                  * then removes the vif. When it removes a station it also
1422                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1423                  * of all the stations of this vif are closed, and the queues
1424                  * of these AMPDU sessions are properly closed.
1425                  * We still need to take care of the shared queues of the vif.
1426                  * Flush them here.
1427                  */
1428                 mutex_lock(&mvm->mutex);
1429                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1430                 mutex_unlock(&mvm->mutex);
1431
1432                 /*
1433                  * There are transports that buffer a few frames in the host.
1434                  * For these, the flush above isn't enough since while we were
1435                  * flushing, the transport might have sent more frames to the
1436                  * device. To solve this, wait here until the transport is
1437                  * empty. Technically, this could have replaced the flush
1438                  * above, but flush is much faster than draining. So flush
1439                  * first, and drain to make sure we have no frames in the
1440                  * transport anymore.
1441                  * If a station still had frames on the shared queues, it is
1442                  * already marked as draining, so to complete the draining, we
1443                  * just need to wait until the transport is empty.
1444                  */
1445                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1446         }
1447
1448         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1449                 /*
1450                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1451                  * We assume here that all the packets sent to the OFFCHANNEL
1452                  * queue are sent in ROC session.
1453                  */
1454                 flush_work(&mvm->roc_done_wk);
1455         } else {
1456                 /*
1457                  * By now, all the AC queues are empty. The AGG queues are
1458                  * empty too. We already got all the Tx responses for all the
1459                  * packets in the queues. The drain work can have been
1460                  * triggered. Flush it.
1461                  */
1462                 flush_work(&mvm->sta_drained_wk);
1463         }
1464 }
1465
1466 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1467                                          struct ieee80211_vif *vif)
1468 {
1469         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1470         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1471
1472         iwl_mvm_prepare_mac_removal(mvm, vif);
1473
1474         mutex_lock(&mvm->mutex);
1475
1476         if (mvm->bf_allowed_vif == mvmvif) {
1477                 mvm->bf_allowed_vif = NULL;
1478                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1479                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1480         }
1481
1482         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1483
1484         /*
1485          * For AP/GO interface, the tear down of the resources allocated to the
1486          * interface is be handled as part of the stop_ap flow.
1487          */
1488         if (vif->type == NL80211_IFTYPE_AP ||
1489             vif->type == NL80211_IFTYPE_ADHOC) {
1490 #ifdef CONFIG_NL80211_TESTMODE
1491                 if (vif == mvm->noa_vif) {
1492                         mvm->noa_vif = NULL;
1493                         mvm->noa_duration = 0;
1494                 }
1495 #endif
1496                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1497                 goto out_release;
1498         }
1499
1500         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1501                 mvm->p2p_device_vif = NULL;
1502                 iwl_mvm_rm_bcast_sta(mvm, vif);
1503                 iwl_mvm_binding_remove_vif(mvm, vif);
1504                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1505                 mvmvif->phy_ctxt = NULL;
1506         }
1507
1508         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1509                 mvm->vif_count--;
1510
1511         iwl_mvm_power_update_mac(mvm);
1512         iwl_mvm_mac_ctxt_remove(mvm, vif);
1513
1514 out_release:
1515         iwl_mvm_mac_ctxt_release(mvm, vif);
1516         mutex_unlock(&mvm->mutex);
1517 }
1518
1519 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1520 {
1521         return 0;
1522 }
1523
1524 struct iwl_mvm_mc_iter_data {
1525         struct iwl_mvm *mvm;
1526         int port_id;
1527 };
1528
1529 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1530                                       struct ieee80211_vif *vif)
1531 {
1532         struct iwl_mvm_mc_iter_data *data = _data;
1533         struct iwl_mvm *mvm = data->mvm;
1534         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1535         int ret, len;
1536
1537         /* if we don't have free ports, mcast frames will be dropped */
1538         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1539                 return;
1540
1541         if (vif->type != NL80211_IFTYPE_STATION ||
1542             !vif->bss_conf.assoc)
1543                 return;
1544
1545         cmd->port_id = data->port_id++;
1546         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1547         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1548
1549         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1550         if (ret)
1551                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1552 }
1553
1554 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1555 {
1556         struct iwl_mvm_mc_iter_data iter_data = {
1557                 .mvm = mvm,
1558         };
1559
1560         lockdep_assert_held(&mvm->mutex);
1561
1562         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1563                 return;
1564
1565         ieee80211_iterate_active_interfaces_atomic(
1566                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1567                 iwl_mvm_mc_iface_iterator, &iter_data);
1568 }
1569
1570 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1571                                      struct netdev_hw_addr_list *mc_list)
1572 {
1573         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1574         struct iwl_mcast_filter_cmd *cmd;
1575         struct netdev_hw_addr *addr;
1576         int addr_count;
1577         bool pass_all;
1578         int len;
1579
1580         addr_count = netdev_hw_addr_list_count(mc_list);
1581         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1582                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1583         if (pass_all)
1584                 addr_count = 0;
1585
1586         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1587         cmd = kzalloc(len, GFP_ATOMIC);
1588         if (!cmd)
1589                 return 0;
1590
1591         if (pass_all) {
1592                 cmd->pass_all = 1;
1593                 return (u64)(unsigned long)cmd;
1594         }
1595
1596         netdev_hw_addr_list_for_each(addr, mc_list) {
1597                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1598                                    cmd->count, addr->addr);
1599                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1600                        addr->addr, ETH_ALEN);
1601                 cmd->count++;
1602         }
1603
1604         return (u64)(unsigned long)cmd;
1605 }
1606
1607 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1608                                      unsigned int changed_flags,
1609                                      unsigned int *total_flags,
1610                                      u64 multicast)
1611 {
1612         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1613         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1614
1615         mutex_lock(&mvm->mutex);
1616
1617         /* replace previous configuration */
1618         kfree(mvm->mcast_filter_cmd);
1619         mvm->mcast_filter_cmd = cmd;
1620
1621         if (!cmd)
1622                 goto out;
1623
1624         iwl_mvm_recalc_multicast(mvm);
1625 out:
1626         mutex_unlock(&mvm->mutex);
1627         *total_flags = 0;
1628 }
1629
1630 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1631                                         struct ieee80211_vif *vif,
1632                                         unsigned int filter_flags,
1633                                         unsigned int changed_flags)
1634 {
1635         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1636
1637         /* We support only filter for probe requests */
1638         if (!(changed_flags & FIF_PROBE_REQ))
1639                 return;
1640
1641         /* Supported only for p2p client interfaces */
1642         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1643             !vif->p2p)
1644                 return;
1645
1646         mutex_lock(&mvm->mutex);
1647         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1648         mutex_unlock(&mvm->mutex);
1649 }
1650
1651 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1652 struct iwl_bcast_iter_data {
1653         struct iwl_mvm *mvm;
1654         struct iwl_bcast_filter_cmd *cmd;
1655         u8 current_filter;
1656 };
1657
1658 static void
1659 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1660                          const struct iwl_fw_bcast_filter *in_filter,
1661                          struct iwl_fw_bcast_filter *out_filter)
1662 {
1663         struct iwl_fw_bcast_filter_attr *attr;
1664         int i;
1665
1666         memcpy(out_filter, in_filter, sizeof(*out_filter));
1667
1668         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1669                 attr = &out_filter->attrs[i];
1670
1671                 if (!attr->mask)
1672                         break;
1673
1674                 switch (attr->reserved1) {
1675                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1676                         if (vif->bss_conf.arp_addr_cnt != 1) {
1677                                 attr->mask = 0;
1678                                 continue;
1679                         }
1680
1681                         attr->val = vif->bss_conf.arp_addr_list[0];
1682                         break;
1683                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1684                         attr->val = *(__be32 *)&vif->addr[2];
1685                         break;
1686                 default:
1687                         break;
1688                 }
1689                 attr->reserved1 = 0;
1690                 out_filter->num_attrs++;
1691         }
1692 }
1693
1694 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1695                                           struct ieee80211_vif *vif)
1696 {
1697         struct iwl_bcast_iter_data *data = _data;
1698         struct iwl_mvm *mvm = data->mvm;
1699         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1700         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1701         struct iwl_fw_bcast_mac *bcast_mac;
1702         int i;
1703
1704         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1705                 return;
1706
1707         bcast_mac = &cmd->macs[mvmvif->id];
1708
1709         /*
1710          * enable filtering only for associated stations, but not for P2P
1711          * Clients
1712          */
1713         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1714             !vif->bss_conf.assoc)
1715                 return;
1716
1717         bcast_mac->default_discard = 1;
1718
1719         /* copy all configured filters */
1720         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1721                 /*
1722                  * Make sure we don't exceed our filters limit.
1723                  * if there is still a valid filter to be configured,
1724                  * be on the safe side and just allow bcast for this mac.
1725                  */
1726                 if (WARN_ON_ONCE(data->current_filter >=
1727                                  ARRAY_SIZE(cmd->filters))) {
1728                         bcast_mac->default_discard = 0;
1729                         bcast_mac->attached_filters = 0;
1730                         break;
1731                 }
1732
1733                 iwl_mvm_set_bcast_filter(vif,
1734                                          &mvm->bcast_filters[i],
1735                                          &cmd->filters[data->current_filter]);
1736
1737                 /* skip current filter if it contains no attributes */
1738                 if (!cmd->filters[data->current_filter].num_attrs)
1739                         continue;
1740
1741                 /* attach the filter to current mac */
1742                 bcast_mac->attached_filters |=
1743                                 cpu_to_le16(BIT(data->current_filter));
1744
1745                 data->current_filter++;
1746         }
1747 }
1748
1749 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1750                                     struct iwl_bcast_filter_cmd *cmd)
1751 {
1752         struct iwl_bcast_iter_data iter_data = {
1753                 .mvm = mvm,
1754                 .cmd = cmd,
1755         };
1756
1757         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1758                 return false;
1759
1760         memset(cmd, 0, sizeof(*cmd));
1761         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1762         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1763
1764 #ifdef CONFIG_IWLWIFI_DEBUGFS
1765         /* use debugfs filters/macs if override is configured */
1766         if (mvm->dbgfs_bcast_filtering.override) {
1767                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1768                        sizeof(cmd->filters));
1769                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1770                        sizeof(cmd->macs));
1771                 return true;
1772         }
1773 #endif
1774
1775         /* if no filters are configured, do nothing */
1776         if (!mvm->bcast_filters)
1777                 return false;
1778
1779         /* configure and attach these filters for each associated sta vif */
1780         ieee80211_iterate_active_interfaces(
1781                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1782                 iwl_mvm_bcast_filter_iterator, &iter_data);
1783
1784         return true;
1785 }
1786
1787 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1788 {
1789         struct iwl_bcast_filter_cmd cmd;
1790
1791         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1792                 return 0;
1793
1794         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1795                 return 0;
1796
1797         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1798                                     sizeof(cmd), &cmd);
1799 }
1800 #else
1801 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1802 {
1803         return 0;
1804 }
1805 #endif
1806
1807 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1808                                     struct ieee80211_vif *vif)
1809 {
1810         struct iwl_mu_group_mgmt_cmd cmd = {};
1811
1812         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1813                WLAN_MEMBERSHIP_LEN);
1814         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1815                WLAN_USER_POSITION_LEN);
1816
1817         return iwl_mvm_send_cmd_pdu(mvm,
1818                                     WIDE_ID(DATA_PATH_GROUP,
1819                                             UPDATE_MU_GROUPS_CMD),
1820                                     0, sizeof(cmd), &cmd);
1821 }
1822
1823 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1824                                            struct ieee80211_vif *vif)
1825 {
1826         if (vif->mu_mimo_owner) {
1827                 struct iwl_mu_group_mgmt_notif *notif = _data;
1828
1829                 /*
1830                  * MU-MIMO Group Id action frame is little endian. We treat
1831                  * the data received from firmware as if it came from the
1832                  * action frame, so no conversion is needed.
1833                  */
1834                 ieee80211_update_mu_groups(vif,
1835                                            (u8 *)&notif->membership_status,
1836                                            (u8 *)&notif->user_position);
1837         }
1838 }
1839
1840 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1841                                struct iwl_rx_cmd_buffer *rxb)
1842 {
1843         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1844         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1845
1846         ieee80211_iterate_active_interfaces_atomic(
1847                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1848                         iwl_mvm_mu_mimo_iface_iterator, notif);
1849 }
1850
1851 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1852                                              struct ieee80211_vif *vif,
1853                                              struct ieee80211_bss_conf *bss_conf,
1854                                              u32 changes)
1855 {
1856         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1857         int ret;
1858
1859         /*
1860          * Re-calculate the tsf id, as the master-slave relations depend on the
1861          * beacon interval, which was not known when the station interface was
1862          * added.
1863          */
1864         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1865                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1866
1867         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1868             mvmvif->lqm_active)
1869                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1870                                      0, 0);
1871
1872         /*
1873          * If we're not associated yet, take the (new) BSSID before associating
1874          * so the firmware knows. If we're already associated, then use the old
1875          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1876          * branch for disassociation below.
1877          */
1878         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1879                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1880
1881         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1882         if (ret)
1883                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1884
1885         /* after sending it once, adopt mac80211 data */
1886         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1887         mvmvif->associated = bss_conf->assoc;
1888
1889         if (changes & BSS_CHANGED_ASSOC) {
1890                 if (bss_conf->assoc) {
1891                         /* clear statistics to get clean beacon counter */
1892                         iwl_mvm_request_statistics(mvm, true);
1893                         memset(&mvmvif->beacon_stats, 0,
1894                                sizeof(mvmvif->beacon_stats));
1895
1896                         /* add quota for this interface */
1897                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1898                         if (ret) {
1899                                 IWL_ERR(mvm, "failed to update quotas\n");
1900                                 return;
1901                         }
1902
1903                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1904                                      &mvm->status)) {
1905                                 /*
1906                                  * If we're restarting then the firmware will
1907                                  * obviously have lost synchronisation with
1908                                  * the AP. It will attempt to synchronise by
1909                                  * itself, but we can make it more reliable by
1910                                  * scheduling a session protection time event.
1911                                  *
1912                                  * The firmware needs to receive a beacon to
1913                                  * catch up with synchronisation, use 110% of
1914                                  * the beacon interval.
1915                                  *
1916                                  * Set a large maximum delay to allow for more
1917                                  * than a single interface.
1918                                  */
1919                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1920                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1921                                                         5 * dur, false);
1922                         }
1923
1924                         iwl_mvm_sf_update(mvm, vif, false);
1925                         iwl_mvm_power_vif_assoc(mvm, vif);
1926                         if (vif->p2p) {
1927                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1928                                 iwl_mvm_update_smps(mvm, vif,
1929                                                     IWL_MVM_SMPS_REQ_PROT,
1930                                                     IEEE80211_SMPS_DYNAMIC);
1931                         }
1932                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1933                         /*
1934                          * If update fails - SF might be running in associated
1935                          * mode while disassociated - which is forbidden.
1936                          */
1937                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1938                                   "Failed to update SF upon disassociation\n");
1939
1940                         /* remove AP station now that the MAC is unassoc */
1941                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1942                         if (ret)
1943                                 IWL_ERR(mvm, "failed to remove AP station\n");
1944
1945                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1946                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1947                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1948                         /* remove quota for this interface */
1949                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1950                         if (ret)
1951                                 IWL_ERR(mvm, "failed to update quotas\n");
1952
1953                         if (vif->p2p)
1954                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1955
1956                         /* this will take the cleared BSSID from bss_conf */
1957                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1958                         if (ret)
1959                                 IWL_ERR(mvm,
1960                                         "failed to update MAC %pM (clear after unassoc)\n",
1961                                         vif->addr);
1962                 }
1963
1964                 /*
1965                  * The firmware tracks the MU-MIMO group on its own.
1966                  * However, on HW restart we should restore this data.
1967                  */
1968                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1969                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1970                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1971                         if (ret)
1972                                 IWL_ERR(mvm,
1973                                         "failed to update VHT MU_MIMO groups\n");
1974                 }
1975
1976                 iwl_mvm_recalc_multicast(mvm);
1977                 iwl_mvm_configure_bcast_filter(mvm);
1978
1979                 /* reset rssi values */
1980                 mvmvif->bf_data.ave_beacon_signal = 0;
1981
1982                 iwl_mvm_bt_coex_vif_change(mvm);
1983                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1984                                     IEEE80211_SMPS_AUTOMATIC);
1985                 if (fw_has_capa(&mvm->fw->ucode_capa,
1986                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1987                         iwl_mvm_config_scan(mvm);
1988         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1989                 /*
1990                  * We received a beacon _after_ association so
1991                  * remove the session protection.
1992                  */
1993                 iwl_mvm_remove_time_event(mvm, mvmvif,
1994                                           &mvmvif->time_event_data);
1995         }
1996
1997         if (changes & BSS_CHANGED_BEACON_INFO) {
1998                 iwl_mvm_sf_update(mvm, vif, false);
1999                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2000         }
2001
2002         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
2003                        /*
2004                         * Send power command on every beacon change,
2005                         * because we may have not enabled beacon abort yet.
2006                         */
2007                        BSS_CHANGED_BEACON_INFO)) {
2008                 ret = iwl_mvm_power_update_mac(mvm);
2009                 if (ret)
2010                         IWL_ERR(mvm, "failed to update power mode\n");
2011         }
2012
2013         if (changes & BSS_CHANGED_TXPOWER) {
2014                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2015                                 bss_conf->txpower);
2016                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2017         }
2018
2019         if (changes & BSS_CHANGED_CQM) {
2020                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2021                 /* reset cqm events tracking */
2022                 mvmvif->bf_data.last_cqm_event = 0;
2023                 if (mvmvif->bf_data.bf_enabled) {
2024                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2025                         if (ret)
2026                                 IWL_ERR(mvm,
2027                                         "failed to update CQM thresholds\n");
2028                 }
2029         }
2030
2031         if (changes & BSS_CHANGED_ARP_FILTER) {
2032                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2033                 iwl_mvm_configure_bcast_filter(mvm);
2034         }
2035 }
2036
2037 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2038                                  struct ieee80211_vif *vif)
2039 {
2040         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2041         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2042         int ret;
2043
2044         /*
2045          * iwl_mvm_mac_ctxt_add() might read directly from the device
2046          * (the system time), so make sure it is available.
2047          */
2048         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2049         if (ret)
2050                 return ret;
2051
2052         mutex_lock(&mvm->mutex);
2053
2054         /* Send the beacon template */
2055         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2056         if (ret)
2057                 goto out_unlock;
2058
2059         /*
2060          * Re-calculate the tsf id, as the master-slave relations depend on the
2061          * beacon interval, which was not known when the AP interface was added.
2062          */
2063         if (vif->type == NL80211_IFTYPE_AP)
2064                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2065
2066         mvmvif->ap_assoc_sta_count = 0;
2067
2068         /* Add the mac context */
2069         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2070         if (ret)
2071                 goto out_unlock;
2072
2073         /* Perform the binding */
2074         ret = iwl_mvm_binding_add_vif(mvm, vif);
2075         if (ret)
2076                 goto out_remove;
2077
2078         /* Send the bcast station. At this stage the TBTT and DTIM time events
2079          * are added and applied to the scheduler */
2080         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2081         if (ret)
2082                 goto out_unbind;
2083
2084         /* must be set before quota calculations */
2085         mvmvif->ap_ibss_active = true;
2086
2087         /* power updated needs to be done before quotas */
2088         iwl_mvm_power_update_mac(mvm);
2089
2090         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2091         if (ret)
2092                 goto out_quota_failed;
2093
2094         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2095         if (vif->p2p && mvm->p2p_device_vif)
2096                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2097
2098         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2099
2100         iwl_mvm_bt_coex_vif_change(mvm);
2101
2102         /* we don't support TDLS during DCM */
2103         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2104                 iwl_mvm_teardown_tdls_peers(mvm);
2105
2106         goto out_unlock;
2107
2108 out_quota_failed:
2109         iwl_mvm_power_update_mac(mvm);
2110         mvmvif->ap_ibss_active = false;
2111         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2112 out_unbind:
2113         iwl_mvm_binding_remove_vif(mvm, vif);
2114 out_remove:
2115         iwl_mvm_mac_ctxt_remove(mvm, vif);
2116 out_unlock:
2117         mutex_unlock(&mvm->mutex);
2118         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2119         return ret;
2120 }
2121
2122 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2123                                  struct ieee80211_vif *vif)
2124 {
2125         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2126         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2127
2128         iwl_mvm_prepare_mac_removal(mvm, vif);
2129
2130         mutex_lock(&mvm->mutex);
2131
2132         /* Handle AP stop while in CSA */
2133         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2134                 iwl_mvm_remove_time_event(mvm, mvmvif,
2135                                           &mvmvif->time_event_data);
2136                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2137                 mvmvif->csa_countdown = false;
2138         }
2139
2140         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2141                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2142                 mvm->csa_tx_block_bcn_timeout = 0;
2143         }
2144
2145         mvmvif->ap_ibss_active = false;
2146         mvm->ap_last_beacon_gp2 = 0;
2147
2148         iwl_mvm_bt_coex_vif_change(mvm);
2149
2150         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2151
2152         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2153         if (vif->p2p && mvm->p2p_device_vif)
2154                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2155
2156         iwl_mvm_update_quotas(mvm, false, NULL);
2157         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2158         iwl_mvm_binding_remove_vif(mvm, vif);
2159
2160         iwl_mvm_power_update_mac(mvm);
2161
2162         iwl_mvm_mac_ctxt_remove(mvm, vif);
2163
2164         mutex_unlock(&mvm->mutex);
2165 }
2166
2167 static void
2168 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2169                                  struct ieee80211_vif *vif,
2170                                  struct ieee80211_bss_conf *bss_conf,
2171                                  u32 changes)
2172 {
2173         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2174
2175         /* Changes will be applied when the AP/IBSS is started */
2176         if (!mvmvif->ap_ibss_active)
2177                 return;
2178
2179         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2180                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2181             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2182                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2183
2184         /* Need to send a new beacon template to the FW */
2185         if (changes & BSS_CHANGED_BEACON &&
2186             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2187                 IWL_WARN(mvm, "Failed updating beacon data\n");
2188
2189         if (changes & BSS_CHANGED_TXPOWER) {
2190                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2191                                 bss_conf->txpower);
2192                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2193         }
2194 }
2195
2196 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2197                                      struct ieee80211_vif *vif,
2198                                      struct ieee80211_bss_conf *bss_conf,
2199                                      u32 changes)
2200 {
2201         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2202
2203         /*
2204          * iwl_mvm_bss_info_changed_station() might call
2205          * iwl_mvm_protect_session(), which reads directly from
2206          * the device (the system time), so make sure it is available.
2207          */
2208         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2209                 return;
2210
2211         mutex_lock(&mvm->mutex);
2212
2213         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2214                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2215
2216         switch (vif->type) {
2217         case NL80211_IFTYPE_STATION:
2218                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2219                 break;
2220         case NL80211_IFTYPE_AP:
2221         case NL80211_IFTYPE_ADHOC:
2222                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2223                 break;
2224         default:
2225                 /* shouldn't happen */
2226                 WARN_ON_ONCE(1);
2227         }
2228
2229         mutex_unlock(&mvm->mutex);
2230         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2231 }
2232
2233 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2234                                struct ieee80211_vif *vif,
2235                                struct ieee80211_scan_request *hw_req)
2236 {
2237         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2238         int ret;
2239
2240         if (hw_req->req.n_channels == 0 ||
2241             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2242                 return -EINVAL;
2243
2244         mutex_lock(&mvm->mutex);
2245         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2246         mutex_unlock(&mvm->mutex);
2247
2248         return ret;
2249 }
2250
2251 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2252                                        struct ieee80211_vif *vif)
2253 {
2254         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2255
2256         mutex_lock(&mvm->mutex);
2257
2258         /* Due to a race condition, it's possible that mac80211 asks
2259          * us to stop a hw_scan when it's already stopped.  This can
2260          * happen, for instance, if we stopped the scan ourselves,
2261          * called ieee80211_scan_completed() and the userspace called
2262          * cancel scan scan before ieee80211_scan_work() could run.
2263          * To handle that, simply return if the scan is not running.
2264         */
2265         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2266                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2267
2268         mutex_unlock(&mvm->mutex);
2269 }
2270
2271 static void
2272 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2273                                   struct ieee80211_sta *sta, u16 tids,
2274                                   int num_frames,
2275                                   enum ieee80211_frame_release_type reason,
2276                                   bool more_data)
2277 {
2278         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2279
2280         /* Called when we need to transmit (a) frame(s) from mac80211 */
2281
2282         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2283                                           tids, more_data, false);
2284 }
2285
2286 static void
2287 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2288                                     struct ieee80211_sta *sta, u16 tids,
2289                                     int num_frames,
2290                                     enum ieee80211_frame_release_type reason,
2291                                     bool more_data)
2292 {
2293         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2294
2295         /* Called when we need to transmit (a) frame(s) from agg queue */
2296
2297         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2298                                           tids, more_data, true);
2299 }
2300
2301 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2302                                    struct ieee80211_vif *vif,
2303                                    enum sta_notify_cmd cmd,
2304                                    struct ieee80211_sta *sta)
2305 {
2306         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2307         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2308         unsigned long txqs = 0, tids = 0;
2309         int tid;
2310
2311         spin_lock_bh(&mvmsta->lock);
2312         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2313                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2314
2315                 if (tid_data->state != IWL_AGG_ON &&
2316                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2317                         continue;
2318
2319                 __set_bit(tid_data->txq_id, &txqs);
2320
2321                 if (iwl_mvm_tid_queued(tid_data) == 0)
2322                         continue;
2323
2324                 __set_bit(tid, &tids);
2325         }
2326
2327         switch (cmd) {
2328         case STA_NOTIFY_SLEEP:
2329                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2330                         ieee80211_sta_block_awake(hw, sta, true);
2331
2332                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2333                         ieee80211_sta_set_buffered(sta, tid, true);
2334
2335                 if (txqs)
2336                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2337                 /*
2338                  * The fw updates the STA to be asleep. Tx packets on the Tx
2339                  * queues to this station will not be transmitted. The fw will
2340                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2341                  */
2342                 break;
2343         case STA_NOTIFY_AWAKE:
2344                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2345                         break;
2346
2347                 if (txqs)
2348                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2349                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2350                 break;
2351         default:
2352                 break;
2353         }
2354         spin_unlock_bh(&mvmsta->lock);
2355 }
2356
2357 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2358                                        struct ieee80211_vif *vif,
2359                                        struct ieee80211_sta *sta)
2360 {
2361         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2362         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2363
2364         /*
2365          * This is called before mac80211 does RCU synchronisation,
2366          * so here we already invalidate our internal RCU-protected
2367          * station pointer. The rest of the code will thus no longer
2368          * be able to find the station this way, and we don't rely
2369          * on further RCU synchronisation after the sta_state()
2370          * callback deleted the station.
2371          */
2372         mutex_lock(&mvm->mutex);
2373         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2374                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2375                                    ERR_PTR(-ENOENT));
2376
2377         mutex_unlock(&mvm->mutex);
2378 }
2379
2380 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2381                                 const u8 *bssid)
2382 {
2383         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2384                 return;
2385
2386         if (vif->p2p && !iwl_mvm_is_p2p_scm_uapsd_supported(mvm)) {
2387                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2388                 return;
2389         }
2390
2391         if (!vif->p2p &&
2392             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2393                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2394                 return;
2395         }
2396
2397         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2398 }
2399
2400 static void
2401 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2402                            struct ieee80211_vif *vif, u8 *peer_addr,
2403                            enum nl80211_tdls_operation action)
2404 {
2405         struct iwl_fw_dbg_trigger_tlv *trig;
2406         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2407
2408         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2409                 return;
2410
2411         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2412         tdls_trig = (void *)trig->data;
2413         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2414                 return;
2415
2416         if (!(tdls_trig->action_bitmap & BIT(action)))
2417                 return;
2418
2419         if (tdls_trig->peer_mode &&
2420             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2421                 return;
2422
2423         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2424                                     "TDLS event occurred, peer %pM, action %d",
2425                                     peer_addr, action);
2426 }
2427
2428 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2429                                              struct iwl_mvm_sta *mvm_sta)
2430 {
2431         struct iwl_mvm_tid_data *tid_data;
2432         struct sk_buff *skb;
2433         int i;
2434
2435         spin_lock_bh(&mvm_sta->lock);
2436         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2437                 tid_data = &mvm_sta->tid_data[i];
2438                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2439                         ieee80211_free_txskb(mvm->hw, skb);
2440         }
2441         spin_unlock_bh(&mvm_sta->lock);
2442 }
2443
2444 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2445                                  struct ieee80211_vif *vif,
2446                                  struct ieee80211_sta *sta,
2447                                  enum ieee80211_sta_state old_state,
2448                                  enum ieee80211_sta_state new_state)
2449 {
2450         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2451         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2452         int ret;
2453
2454         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2455                            sta->addr, old_state, new_state);
2456
2457         /* this would be a mac80211 bug ... but don't crash */
2458         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2459                 return -EINVAL;
2460
2461         /* if a STA is being removed, reuse its ID */
2462         flush_work(&mvm->sta_drained_wk);
2463
2464         /*
2465          * If we are in a STA removal flow and in DQA mode:
2466          *
2467          * This is after the sync_rcu part, so the queues have already been
2468          * flushed. No more TXs on their way in mac80211's path, and no more in
2469          * the queues.
2470          * Also, we won't be getting any new TX frames for this station.
2471          * What we might have are deferred TX frames that need to be taken care
2472          * of.
2473          *
2474          * Drop any still-queued deferred-frame before removing the STA, and
2475          * make sure the worker is no longer handling frames for this STA.
2476          */
2477         if (old_state == IEEE80211_STA_NONE &&
2478             new_state == IEEE80211_STA_NOTEXIST &&
2479             iwl_mvm_is_dqa_supported(mvm)) {
2480                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2481
2482                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2483                 flush_work(&mvm->add_stream_wk);
2484
2485                 /*
2486                  * No need to make sure deferred TX indication is off since the
2487                  * worker will already remove it if it was on
2488                  */
2489         }
2490
2491         mutex_lock(&mvm->mutex);
2492         if (old_state == IEEE80211_STA_NOTEXIST &&
2493             new_state == IEEE80211_STA_NONE) {
2494                 /*
2495                  * Firmware bug - it'll crash if the beacon interval is less
2496                  * than 16. We can't avoid connecting at all, so refuse the
2497                  * station state change, this will cause mac80211 to abandon
2498                  * attempts to connect to this AP, and eventually wpa_s will
2499                  * blacklist the AP...
2500                  */
2501                 if (vif->type == NL80211_IFTYPE_STATION &&
2502                     vif->bss_conf.beacon_int < 16) {
2503                         IWL_ERR(mvm,
2504                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2505                                 sta->addr, vif->bss_conf.beacon_int);
2506                         ret = -EINVAL;
2507                         goto out_unlock;
2508                 }
2509
2510                 if (sta->tdls &&
2511                     (vif->p2p ||
2512                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2513                                                 IWL_MVM_TDLS_STA_COUNT ||
2514                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2515                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2516                         ret = -EBUSY;
2517                         goto out_unlock;
2518                 }
2519
2520                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2521                 if (sta->tdls && ret == 0) {
2522                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2523                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2524                                                    NL80211_TDLS_SETUP);
2525                 }
2526         } else if (old_state == IEEE80211_STA_NONE &&
2527                    new_state == IEEE80211_STA_AUTH) {
2528                 /*
2529                  * EBS may be disabled due to previous failures reported by FW.
2530                  * Reset EBS status here assuming environment has been changed.
2531                  */
2532                 mvm->last_ebs_successful = true;
2533                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2534                 ret = 0;
2535         } else if (old_state == IEEE80211_STA_AUTH &&
2536                    new_state == IEEE80211_STA_ASSOC) {
2537                 if (vif->type == NL80211_IFTYPE_AP) {
2538                         mvmvif->ap_assoc_sta_count++;
2539                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2540                 }
2541                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2542                 if (ret == 0)
2543                         iwl_mvm_rs_rate_init(mvm, sta,
2544                                              mvmvif->phy_ctxt->channel->band,
2545                                              true);
2546         } else if (old_state == IEEE80211_STA_ASSOC &&
2547                    new_state == IEEE80211_STA_AUTHORIZED) {
2548
2549                 /* we don't support TDLS during DCM */
2550                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2551                         iwl_mvm_teardown_tdls_peers(mvm);
2552
2553                 if (sta->tdls)
2554                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2555                                                    NL80211_TDLS_ENABLE_LINK);
2556
2557                 /* enable beacon filtering */
2558                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2559                 ret = 0;
2560         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2561                    new_state == IEEE80211_STA_ASSOC) {
2562                 /* disable beacon filtering */
2563                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2564                 ret = 0;
2565         } else if (old_state == IEEE80211_STA_ASSOC &&
2566                    new_state == IEEE80211_STA_AUTH) {
2567                 if (vif->type == NL80211_IFTYPE_AP) {
2568                         mvmvif->ap_assoc_sta_count--;
2569                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2570                 }
2571                 ret = 0;
2572         } else if (old_state == IEEE80211_STA_AUTH &&
2573                    new_state == IEEE80211_STA_NONE) {
2574                 ret = 0;
2575         } else if (old_state == IEEE80211_STA_NONE &&
2576                    new_state == IEEE80211_STA_NOTEXIST) {
2577                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2578                 if (sta->tdls) {
2579                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2580                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2581                                                    NL80211_TDLS_DISABLE_LINK);
2582                 }
2583         } else {
2584                 ret = -EIO;
2585         }
2586  out_unlock:
2587         mutex_unlock(&mvm->mutex);
2588
2589         if (sta->tdls && ret == 0) {
2590                 if (old_state == IEEE80211_STA_NOTEXIST &&
2591                     new_state == IEEE80211_STA_NONE)
2592                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2593                 else if (old_state == IEEE80211_STA_NONE &&
2594                          new_state == IEEE80211_STA_NOTEXIST)
2595                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2596         }
2597
2598         return ret;
2599 }
2600
2601 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2602 {
2603         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2604
2605         mvm->rts_threshold = value;
2606
2607         return 0;
2608 }
2609
2610 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2611                                   struct ieee80211_vif *vif,
2612                                   struct ieee80211_sta *sta, u32 changed)
2613 {
2614         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2615
2616         if (vif->type == NL80211_IFTYPE_STATION &&
2617             changed & IEEE80211_RC_NSS_CHANGED)
2618                 iwl_mvm_sf_update(mvm, vif, false);
2619 }
2620
2621 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2622                                struct ieee80211_vif *vif, u16 ac,
2623                                const struct ieee80211_tx_queue_params *params)
2624 {
2625         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2626         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2627
2628         mvmvif->queue_params[ac] = *params;
2629
2630         /*
2631          * No need to update right away, we'll get BSS_CHANGED_QOS
2632          * The exception is P2P_DEVICE interface which needs immediate update.
2633          */
2634         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2635                 int ret;
2636
2637                 mutex_lock(&mvm->mutex);
2638                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2639                 mutex_unlock(&mvm->mutex);
2640                 return ret;
2641         }
2642         return 0;
2643 }
2644
2645 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2646                                       struct ieee80211_vif *vif)
2647 {
2648         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2649         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2650         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2651
2652         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2653                 return;
2654
2655         /*
2656          * iwl_mvm_protect_session() reads directly from the device
2657          * (the system time), so make sure it is available.
2658          */
2659         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2660                 return;
2661
2662         mutex_lock(&mvm->mutex);
2663         /* Try really hard to protect the session and hear a beacon */
2664         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2665         mutex_unlock(&mvm->mutex);
2666
2667         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2668 }
2669
2670 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2671                                         struct ieee80211_vif *vif,
2672                                         struct cfg80211_sched_scan_request *req,
2673                                         struct ieee80211_scan_ies *ies)
2674 {
2675         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2676
2677         int ret;
2678
2679         mutex_lock(&mvm->mutex);
2680
2681         if (!vif->bss_conf.idle) {
2682                 ret = -EBUSY;
2683                 goto out;
2684         }
2685
2686         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2687
2688 out:
2689         mutex_unlock(&mvm->mutex);
2690         return ret;
2691 }
2692
2693 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2694                                        struct ieee80211_vif *vif)
2695 {
2696         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2697         int ret;
2698
2699         mutex_lock(&mvm->mutex);
2700
2701         /* Due to a race condition, it's possible that mac80211 asks
2702          * us to stop a sched_scan when it's already stopped.  This
2703          * can happen, for instance, if we stopped the scan ourselves,
2704          * called ieee80211_sched_scan_stopped() and the userspace called
2705          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2706          * could run.  To handle this, simply return if the scan is
2707          * not running.
2708         */
2709         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2710                 mutex_unlock(&mvm->mutex);
2711                 return 0;
2712         }
2713
2714         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2715         mutex_unlock(&mvm->mutex);
2716         iwl_mvm_wait_for_async_handlers(mvm);
2717
2718         return ret;
2719 }
2720
2721 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2722                                enum set_key_cmd cmd,
2723                                struct ieee80211_vif *vif,
2724                                struct ieee80211_sta *sta,
2725                                struct ieee80211_key_conf *key)
2726 {
2727         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2728         struct iwl_mvm_sta *mvmsta;
2729         struct iwl_mvm_key_pn *ptk_pn;
2730         int keyidx = key->keyidx;
2731         int ret;
2732         u8 key_offset;
2733
2734         if (iwlwifi_mod_params.sw_crypto) {
2735                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2736                 return -EOPNOTSUPP;
2737         }
2738
2739         switch (key->cipher) {
2740         case WLAN_CIPHER_SUITE_TKIP:
2741                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2742                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2743                 break;
2744         case WLAN_CIPHER_SUITE_CCMP:
2745         case WLAN_CIPHER_SUITE_GCMP:
2746         case WLAN_CIPHER_SUITE_GCMP_256:
2747                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2748                 break;
2749         case WLAN_CIPHER_SUITE_AES_CMAC:
2750                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2751                 break;
2752         case WLAN_CIPHER_SUITE_WEP40:
2753         case WLAN_CIPHER_SUITE_WEP104:
2754                 /* For non-client mode, only use WEP keys for TX as we probably
2755                  * don't have a station yet anyway and would then have to keep
2756                  * track of the keys, linking them to each of the clients/peers
2757                  * as they appear. For now, don't do that, for performance WEP
2758                  * offload doesn't really matter much, but we need it for some
2759                  * other offload features in client mode.
2760                  */
2761                 if (vif->type != NL80211_IFTYPE_STATION)
2762                         return 0;
2763                 break;
2764         default:
2765                 /* currently FW supports only one optional cipher scheme */
2766                 if (hw->n_cipher_schemes &&
2767                     hw->cipher_schemes->cipher == key->cipher)
2768                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2769                 else
2770                         return -EOPNOTSUPP;
2771         }
2772
2773         mutex_lock(&mvm->mutex);
2774
2775         switch (cmd) {
2776         case SET_KEY:
2777                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2778                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2779                         /*
2780                          * GTK on AP interface is a TX-only key, return 0;
2781                          * on IBSS they're per-station and because we're lazy
2782                          * we don't support them for RX, so do the same.
2783                          * CMAC in AP/IBSS modes must be done in software.
2784                          */
2785                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2786                                 ret = -EOPNOTSUPP;
2787                         else
2788                                 ret = 0;
2789                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2790                         break;
2791                 }
2792
2793                 /* During FW restart, in order to restore the state as it was,
2794                  * don't try to reprogram keys we previously failed for.
2795                  */
2796                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2797                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2798                         IWL_DEBUG_MAC80211(mvm,
2799                                            "skip invalid idx key programming during restart\n");
2800                         ret = 0;
2801                         break;
2802                 }
2803
2804                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2805                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2806                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2807                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2808                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2809                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2810                         struct ieee80211_key_seq seq;
2811                         int tid, q;
2812
2813                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2814                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2815                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2816                                          mvm->trans->num_rx_queues *
2817                                                 sizeof(ptk_pn->q[0]),
2818                                          GFP_KERNEL);
2819                         if (!ptk_pn) {
2820                                 ret = -ENOMEM;
2821                                 break;
2822                         }
2823
2824                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2825                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2826                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2827                                         memcpy(ptk_pn->q[q].pn[tid],
2828                                                seq.ccmp.pn,
2829                                                IEEE80211_CCMP_PN_LEN);
2830                         }
2831
2832                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2833                 }
2834
2835                 /* in HW restart reuse the index, otherwise request a new one */
2836                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2837                         key_offset = key->hw_key_idx;
2838                 else
2839                         key_offset = STA_KEY_IDX_INVALID;
2840
2841                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2842                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2843                 if (ret) {
2844                         IWL_WARN(mvm, "set key failed\n");
2845                         /*
2846                          * can't add key for RX, but we don't need it
2847                          * in the device for TX so still return 0
2848                          */
2849                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2850                         ret = 0;
2851                 }
2852
2853                 break;
2854         case DISABLE_KEY:
2855                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2856                         ret = 0;
2857                         break;
2858                 }
2859
2860                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2861                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2862                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2863                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2864                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2865                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2866                         ptk_pn = rcu_dereference_protected(
2867                                                 mvmsta->ptk_pn[keyidx],
2868                                                 lockdep_is_held(&mvm->mutex));
2869                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2870                         if (ptk_pn)
2871                                 kfree_rcu(ptk_pn, rcu_head);
2872                 }
2873
2874                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2875                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2876                 break;
2877         default:
2878                 ret = -EINVAL;
2879         }
2880
2881         mutex_unlock(&mvm->mutex);
2882         return ret;
2883 }
2884
2885 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2886                                         struct ieee80211_vif *vif,
2887                                         struct ieee80211_key_conf *keyconf,
2888                                         struct ieee80211_sta *sta,
2889                                         u32 iv32, u16 *phase1key)
2890 {
2891         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2892
2893         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2894                 return;
2895
2896         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2897 }
2898
2899
2900 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2901                                struct iwl_rx_packet *pkt, void *data)
2902 {
2903         struct iwl_mvm *mvm =
2904                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2905         struct iwl_hs20_roc_res *resp;
2906         int resp_len = iwl_rx_packet_payload_len(pkt);
2907         struct iwl_mvm_time_event_data *te_data = data;
2908
2909         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2910                 return true;
2911
2912         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2913                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2914                 return true;
2915         }
2916
2917         resp = (void *)pkt->data;
2918
2919         IWL_DEBUG_TE(mvm,
2920                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2921                      resp->status, resp->event_unique_id);
2922
2923         te_data->uid = le32_to_cpu(resp->event_unique_id);
2924         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2925                      te_data->uid);
2926
2927         spin_lock_bh(&mvm->time_event_lock);
2928         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2929         spin_unlock_bh(&mvm->time_event_lock);
2930
2931         return true;
2932 }
2933
2934 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2935 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2936 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2937 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2938 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2939 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2940                                     struct ieee80211_channel *channel,
2941                                     struct ieee80211_vif *vif,
2942                                     int duration)
2943 {
2944         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2945         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2946         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2947         static const u16 time_event_response[] = { HOT_SPOT_CMD };
2948         struct iwl_notification_wait wait_time_event;
2949         u32 dtim_interval = vif->bss_conf.dtim_period *
2950                 vif->bss_conf.beacon_int;
2951         u32 req_dur, delay;
2952         struct iwl_hs20_roc_req aux_roc_req = {
2953                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2954                 .id_and_color =
2955                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2956                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2957                 /* Set the channel info data */
2958                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
2959                         PHY_BAND_24 : PHY_BAND_5,
2960                 .channel_info.channel = channel->hw_value,
2961                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2962                 /* Set the time and duration */
2963                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2964          };
2965
2966         delay = AUX_ROC_MIN_DELAY;
2967         req_dur = MSEC_TO_TU(duration);
2968
2969         /*
2970          * If we are associated we want the delay time to be at least one
2971          * dtim interval so that the FW can wait until after the DTIM and
2972          * then start the time event, this will potentially allow us to
2973          * remain off-channel for the max duration.
2974          * Since we want to use almost a whole dtim interval we would also
2975          * like the delay to be for 2-3 dtim intervals, in case there are
2976          * other time events with higher priority.
2977          */
2978         if (vif->bss_conf.assoc) {
2979                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
2980                 /* We cannot remain off-channel longer than the DTIM interval */
2981                 if (dtim_interval <= req_dur) {
2982                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
2983                         if (req_dur <= AUX_ROC_MIN_DURATION)
2984                                 req_dur = dtim_interval -
2985                                         AUX_ROC_MIN_SAFETY_BUFFER;
2986                 }
2987         }
2988
2989         aux_roc_req.duration = cpu_to_le32(req_dur);
2990         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
2991
2992         IWL_DEBUG_TE(mvm,
2993                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
2994                      channel->hw_value, req_dur, duration, delay,
2995                      dtim_interval);
2996         /* Set the node address */
2997         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2998
2999         lockdep_assert_held(&mvm->mutex);
3000
3001         spin_lock_bh(&mvm->time_event_lock);
3002
3003         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3004                 spin_unlock_bh(&mvm->time_event_lock);
3005                 return -EIO;
3006         }
3007
3008         te_data->vif = vif;
3009         te_data->duration = duration;
3010         te_data->id = HOT_SPOT_CMD;
3011
3012         spin_unlock_bh(&mvm->time_event_lock);
3013
3014         /*
3015          * Use a notification wait, which really just processes the
3016          * command response and doesn't wait for anything, in order
3017          * to be able to process the response and get the UID inside
3018          * the RX path. Using CMD_WANT_SKB doesn't work because it
3019          * stores the buffer and then wakes up this thread, by which
3020          * time another notification (that the time event started)
3021          * might already be processed unsuccessfully.
3022          */
3023         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3024                                    time_event_response,
3025                                    ARRAY_SIZE(time_event_response),
3026                                    iwl_mvm_rx_aux_roc, te_data);
3027
3028         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3029                                    &aux_roc_req);
3030
3031         if (res) {
3032                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3033                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3034                 goto out_clear_te;
3035         }
3036
3037         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3038         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3039         /* should never fail */
3040         WARN_ON_ONCE(res);
3041
3042         if (res) {
3043  out_clear_te:
3044                 spin_lock_bh(&mvm->time_event_lock);
3045                 iwl_mvm_te_clear_data(mvm, te_data);
3046                 spin_unlock_bh(&mvm->time_event_lock);
3047         }
3048
3049         return res;
3050 }
3051
3052 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3053                        struct ieee80211_vif *vif,
3054                        struct ieee80211_channel *channel,
3055                        int duration,
3056                        enum ieee80211_roc_type type)
3057 {
3058         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3059         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3060         struct cfg80211_chan_def chandef;
3061         struct iwl_mvm_phy_ctxt *phy_ctxt;
3062         int ret, i;
3063
3064         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3065                            duration, type);
3066
3067         flush_work(&mvm->roc_done_wk);
3068
3069         mutex_lock(&mvm->mutex);
3070
3071         switch (vif->type) {
3072         case NL80211_IFTYPE_STATION:
3073                 if (fw_has_capa(&mvm->fw->ucode_capa,
3074                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3075                         /* Use aux roc framework (HS20) */
3076                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3077                                                        vif, duration);
3078                         goto out_unlock;
3079                 }
3080                 IWL_ERR(mvm, "hotspot not supported\n");
3081                 ret = -EINVAL;
3082                 goto out_unlock;
3083         case NL80211_IFTYPE_P2P_DEVICE:
3084                 /* handle below */
3085                 break;
3086         default:
3087                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3088                 ret = -EINVAL;
3089                 goto out_unlock;
3090         }
3091
3092         for (i = 0; i < NUM_PHY_CTX; i++) {
3093                 phy_ctxt = &mvm->phy_ctxts[i];
3094                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3095                         continue;
3096
3097                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3098                         /*
3099                          * Unbind the P2P_DEVICE from the current PHY context,
3100                          * and if the PHY context is not used remove it.
3101                          */
3102                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3103                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3104                                 goto out_unlock;
3105
3106                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3107
3108                         /* Bind the P2P_DEVICE to the current PHY Context */
3109                         mvmvif->phy_ctxt = phy_ctxt;
3110
3111                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3112                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3113                                 goto out_unlock;
3114
3115                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3116                         goto schedule_time_event;
3117                 }
3118         }
3119
3120         /* Need to update the PHY context only if the ROC channel changed */
3121         if (channel == mvmvif->phy_ctxt->channel)
3122                 goto schedule_time_event;
3123
3124         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3125
3126         /*
3127          * Change the PHY context configuration as it is currently referenced
3128          * only by the P2P Device MAC
3129          */
3130         if (mvmvif->phy_ctxt->ref == 1) {
3131                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3132                                                &chandef, 1, 1);
3133                 if (ret)
3134                         goto out_unlock;
3135         } else {
3136                 /*
3137                  * The PHY context is shared with other MACs. Need to remove the
3138                  * P2P Device from the binding, allocate an new PHY context and
3139                  * create a new binding
3140                  */
3141                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3142                 if (!phy_ctxt) {
3143                         ret = -ENOSPC;
3144                         goto out_unlock;
3145                 }
3146
3147                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3148                                                1, 1);
3149                 if (ret) {
3150                         IWL_ERR(mvm, "Failed to change PHY context\n");
3151                         goto out_unlock;
3152                 }
3153
3154                 /* Unbind the P2P_DEVICE from the current PHY context */
3155                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3156                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3157                         goto out_unlock;
3158
3159                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3160
3161                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3162                 mvmvif->phy_ctxt = phy_ctxt;
3163
3164                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3165                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3166                         goto out_unlock;
3167
3168                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3169         }
3170
3171 schedule_time_event:
3172         /* Schedule the time events */
3173         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3174
3175 out_unlock:
3176         mutex_unlock(&mvm->mutex);
3177         IWL_DEBUG_MAC80211(mvm, "leave\n");
3178         return ret;
3179 }
3180
3181 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3182 {
3183         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3184
3185         IWL_DEBUG_MAC80211(mvm, "enter\n");
3186
3187         mutex_lock(&mvm->mutex);
3188         iwl_mvm_stop_roc(mvm);
3189         mutex_unlock(&mvm->mutex);
3190
3191         IWL_DEBUG_MAC80211(mvm, "leave\n");
3192         return 0;
3193 }
3194
3195 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3196                                  struct ieee80211_chanctx_conf *ctx)
3197 {
3198         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3199         struct iwl_mvm_phy_ctxt *phy_ctxt;
3200         int ret;
3201
3202         lockdep_assert_held(&mvm->mutex);
3203
3204         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3205
3206         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3207         if (!phy_ctxt) {
3208                 ret = -ENOSPC;
3209                 goto out;
3210         }
3211
3212         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3213                                        ctx->rx_chains_static,
3214                                        ctx->rx_chains_dynamic);
3215         if (ret) {
3216                 IWL_ERR(mvm, "Failed to add PHY context\n");
3217                 goto out;
3218         }
3219
3220         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3221         *phy_ctxt_id = phy_ctxt->id;
3222 out:
3223         return ret;
3224 }
3225
3226 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3227                                struct ieee80211_chanctx_conf *ctx)
3228 {
3229         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3230         int ret;
3231
3232         mutex_lock(&mvm->mutex);
3233         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3234         mutex_unlock(&mvm->mutex);
3235
3236         return ret;
3237 }
3238
3239 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3240                                      struct ieee80211_chanctx_conf *ctx)
3241 {
3242         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3243         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3244
3245         lockdep_assert_held(&mvm->mutex);
3246
3247         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3248 }
3249
3250 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3251                                    struct ieee80211_chanctx_conf *ctx)
3252 {
3253         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3254
3255         mutex_lock(&mvm->mutex);
3256         __iwl_mvm_remove_chanctx(mvm, ctx);
3257         mutex_unlock(&mvm->mutex);
3258 }
3259
3260 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3261                                    struct ieee80211_chanctx_conf *ctx,
3262                                    u32 changed)
3263 {
3264         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3265         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3266         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3267
3268         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3269                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3270                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3271                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3272                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3273                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3274                       phy_ctxt->ref, changed))
3275                 return;
3276
3277         mutex_lock(&mvm->mutex);
3278         iwl_mvm_bt_coex_vif_change(mvm);
3279         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3280                                  ctx->rx_chains_static,
3281                                  ctx->rx_chains_dynamic);
3282         mutex_unlock(&mvm->mutex);
3283 }
3284
3285 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3286                                         struct ieee80211_vif *vif,
3287                                         struct ieee80211_chanctx_conf *ctx,
3288                                         bool switching_chanctx)
3289 {
3290         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3291         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3292         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3293         int ret;
3294
3295         lockdep_assert_held(&mvm->mutex);
3296
3297         mvmvif->phy_ctxt = phy_ctxt;
3298
3299         switch (vif->type) {
3300         case NL80211_IFTYPE_AP:
3301                 /* only needed if we're switching chanctx (i.e. during CSA) */
3302                 if (switching_chanctx) {
3303                         mvmvif->ap_ibss_active = true;
3304                         break;
3305                 }
3306         case NL80211_IFTYPE_ADHOC:
3307                 /*
3308                  * The AP binding flow is handled as part of the start_ap flow
3309                  * (in bss_info_changed), similarly for IBSS.
3310                  */
3311                 ret = 0;
3312                 goto out;
3313         case NL80211_IFTYPE_STATION:
3314                 break;
3315         case NL80211_IFTYPE_MONITOR:
3316                 /* always disable PS when a monitor interface is active */
3317                 mvmvif->ps_disabled = true;
3318                 break;
3319         default:
3320                 ret = -EINVAL;
3321                 goto out;
3322         }
3323
3324         ret = iwl_mvm_binding_add_vif(mvm, vif);
3325         if (ret)
3326                 goto out;
3327
3328         /*
3329          * Power state must be updated before quotas,
3330          * otherwise fw will complain.
3331          */
3332         iwl_mvm_power_update_mac(mvm);
3333
3334         /* Setting the quota at this stage is only required for monitor
3335          * interfaces. For the other types, the bss_info changed flow
3336          * will handle quota settings.
3337          */
3338         if (vif->type == NL80211_IFTYPE_MONITOR) {
3339                 mvmvif->monitor_active = true;
3340                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3341                 if (ret)
3342                         goto out_remove_binding;
3343
3344                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3345                 if (ret)
3346                         goto out_remove_binding;
3347
3348         }
3349
3350         /* Handle binding during CSA */
3351         if (vif->type == NL80211_IFTYPE_AP) {
3352                 iwl_mvm_update_quotas(mvm, false, NULL);
3353                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3354         }
3355
3356         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3357                 u32 duration = 2 * vif->bss_conf.beacon_int;
3358
3359                 /* iwl_mvm_protect_session() reads directly from the
3360                  * device (the system time), so make sure it is
3361                  * available.
3362                  */
3363                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3364                 if (ret)
3365                         goto out_remove_binding;
3366
3367                 /* Protect the session to make sure we hear the first
3368                  * beacon on the new channel.
3369                  */
3370                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3371                                         vif->bss_conf.beacon_int / 2,
3372                                         true);
3373
3374                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3375
3376                 iwl_mvm_update_quotas(mvm, false, NULL);
3377         }
3378
3379         goto out;
3380
3381 out_remove_binding:
3382         iwl_mvm_binding_remove_vif(mvm, vif);
3383         iwl_mvm_power_update_mac(mvm);
3384 out:
3385         if (ret)
3386                 mvmvif->phy_ctxt = NULL;
3387         return ret;
3388 }
3389 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3390                                       struct ieee80211_vif *vif,
3391                                       struct ieee80211_chanctx_conf *ctx)
3392 {
3393         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3394         int ret;
3395
3396         mutex_lock(&mvm->mutex);
3397         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3398         mutex_unlock(&mvm->mutex);
3399
3400         return ret;
3401 }
3402
3403 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3404                                            struct ieee80211_vif *vif,
3405                                            struct ieee80211_chanctx_conf *ctx,
3406                                            bool switching_chanctx)
3407 {
3408         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3409         struct ieee80211_vif *disabled_vif = NULL;
3410
3411         lockdep_assert_held(&mvm->mutex);
3412
3413         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3414
3415         switch (vif->type) {
3416         case NL80211_IFTYPE_ADHOC:
3417                 goto out;
3418         case NL80211_IFTYPE_MONITOR:
3419                 mvmvif->monitor_active = false;
3420                 mvmvif->ps_disabled = false;
3421                 iwl_mvm_rm_snif_sta(mvm, vif);
3422                 break;
3423         case NL80211_IFTYPE_AP:
3424                 /* This part is triggered only during CSA */
3425                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3426                         goto out;
3427
3428                 mvmvif->csa_countdown = false;
3429
3430                 /* Set CS bit on all the stations */
3431                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3432
3433                 /* Save blocked iface, the timeout is set on the next beacon */
3434                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3435
3436                 mvmvif->ap_ibss_active = false;
3437                 break;
3438         case NL80211_IFTYPE_STATION:
3439                 if (!switching_chanctx)
3440                         break;
3441
3442                 disabled_vif = vif;
3443
3444                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3445                 break;
3446         default:
3447                 break;
3448         }
3449
3450         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3451         iwl_mvm_binding_remove_vif(mvm, vif);
3452
3453 out:
3454         mvmvif->phy_ctxt = NULL;
3455         iwl_mvm_power_update_mac(mvm);
3456 }
3457
3458 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3459                                          struct ieee80211_vif *vif,
3460                                          struct ieee80211_chanctx_conf *ctx)
3461 {
3462         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3463
3464         mutex_lock(&mvm->mutex);
3465         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3466         mutex_unlock(&mvm->mutex);
3467 }
3468
3469 static int
3470 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3471                                 struct ieee80211_vif_chanctx_switch *vifs)
3472 {
3473         int ret;
3474
3475         mutex_lock(&mvm->mutex);
3476         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3477         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3478
3479         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3480         if (ret) {
3481                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3482                 goto out_reassign;
3483         }
3484
3485         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3486                                            true);
3487         if (ret) {
3488                 IWL_ERR(mvm,
3489                         "failed to assign new_ctx during channel switch\n");
3490                 goto out_remove;
3491         }
3492
3493         /* we don't support TDLS during DCM - can be caused by channel switch */
3494         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3495                 iwl_mvm_teardown_tdls_peers(mvm);
3496
3497         goto out;
3498
3499 out_remove:
3500         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3501
3502 out_reassign:
3503         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3504                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3505                 goto out_restart;
3506         }
3507
3508         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3509                                          true)) {
3510                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3511                 goto out_restart;
3512         }
3513
3514         goto out;
3515
3516 out_restart:
3517         /* things keep failing, better restart the hw */
3518         iwl_mvm_nic_restart(mvm, false);
3519
3520 out:
3521         mutex_unlock(&mvm->mutex);
3522
3523         return ret;
3524 }
3525
3526 static int
3527 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3528                                     struct ieee80211_vif_chanctx_switch *vifs)
3529 {
3530         int ret;
3531
3532         mutex_lock(&mvm->mutex);
3533         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3534
3535         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3536                                            true);
3537         if (ret) {
3538                 IWL_ERR(mvm,
3539                         "failed to assign new_ctx during channel switch\n");
3540                 goto out_reassign;
3541         }
3542
3543         goto out;
3544
3545 out_reassign:
3546         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3547                                          true)) {
3548                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3549                 goto out_restart;
3550         }
3551
3552         goto out;
3553
3554 out_restart:
3555         /* things keep failing, better restart the hw */
3556         iwl_mvm_nic_restart(mvm, false);
3557
3558 out:
3559         mutex_unlock(&mvm->mutex);
3560
3561         return ret;
3562 }
3563
3564 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3565                                       struct ieee80211_vif_chanctx_switch *vifs,
3566                                       int n_vifs,
3567                                       enum ieee80211_chanctx_switch_mode mode)
3568 {
3569         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3570         int ret;
3571
3572         /* we only support a single-vif right now */
3573         if (n_vifs > 1)
3574                 return -EOPNOTSUPP;
3575
3576         switch (mode) {
3577         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3578                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3579                 break;
3580         case CHANCTX_SWMODE_REASSIGN_VIF:
3581                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3582                 break;
3583         default:
3584                 ret = -EOPNOTSUPP;
3585                 break;
3586         }
3587
3588         return ret;
3589 }
3590
3591 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3592                            struct ieee80211_sta *sta,
3593                            bool set)
3594 {
3595         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3596         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3597
3598         if (!mvm_sta || !mvm_sta->vif) {
3599                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3600                 return -EINVAL;
3601         }
3602
3603         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3604 }
3605
3606 #ifdef CONFIG_NL80211_TESTMODE
3607 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3608         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3609         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3610         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3611 };
3612
3613 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3614                                       struct ieee80211_vif *vif,
3615                                       void *data, int len)
3616 {
3617         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3618         int err;
3619         u32 noa_duration;
3620
3621         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3622         if (err)
3623                 return err;
3624
3625         if (!tb[IWL_MVM_TM_ATTR_CMD])
3626                 return -EINVAL;
3627
3628         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3629         case IWL_MVM_TM_CMD_SET_NOA:
3630                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3631                     !vif->bss_conf.enable_beacon ||
3632                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3633                         return -EINVAL;
3634
3635                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3636                 if (noa_duration >= vif->bss_conf.beacon_int)
3637                         return -EINVAL;
3638
3639                 mvm->noa_duration = noa_duration;
3640                 mvm->noa_vif = vif;
3641
3642                 return iwl_mvm_update_quotas(mvm, false, NULL);
3643         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3644                 /* must be associated client vif - ignore authorized */
3645                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3646                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3647                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3648                         return -EINVAL;
3649
3650                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3651                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3652                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3653         }
3654
3655         return -EOPNOTSUPP;
3656 }
3657
3658 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3659                                     struct ieee80211_vif *vif,
3660                                     void *data, int len)
3661 {
3662         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3663         int err;
3664
3665         mutex_lock(&mvm->mutex);
3666         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3667         mutex_unlock(&mvm->mutex);
3668
3669         return err;
3670 }
3671 #endif
3672
3673 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3674                                    struct ieee80211_vif *vif,
3675                                    struct ieee80211_channel_switch *chsw)
3676 {
3677         /* By implementing this operation, we prevent mac80211 from
3678          * starting its own channel switch timer, so that we can call
3679          * ieee80211_chswitch_done() ourselves at the right time
3680          * (which is when the absence time event starts).
3681          */
3682
3683         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3684                            "dummy channel switch op\n");
3685 }
3686
3687 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3688                                       struct ieee80211_vif *vif,
3689                                       struct ieee80211_channel_switch *chsw)
3690 {
3691         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3692         struct ieee80211_vif *csa_vif;
3693         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3694         u32 apply_time;
3695         int ret;
3696
3697         mutex_lock(&mvm->mutex);
3698
3699         mvmvif->csa_failed = false;
3700
3701         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3702                            chsw->chandef.center_freq1);
3703
3704         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3705
3706         switch (vif->type) {
3707         case NL80211_IFTYPE_AP:
3708                 csa_vif =
3709                         rcu_dereference_protected(mvm->csa_vif,
3710                                                   lockdep_is_held(&mvm->mutex));
3711                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3712                               "Another CSA is already in progress")) {
3713                         ret = -EBUSY;
3714                         goto out_unlock;
3715                 }
3716
3717                 /* we still didn't unblock tx. prevent new CS meanwhile */
3718                 if (rcu_dereference_protected(mvm->csa_tx_blocked_vif,
3719                                               lockdep_is_held(&mvm->mutex))) {
3720                         ret = -EBUSY;
3721                         goto out_unlock;
3722                 }
3723
3724                 rcu_assign_pointer(mvm->csa_vif, vif);
3725
3726                 if (WARN_ONCE(mvmvif->csa_countdown,
3727                               "Previous CSA countdown didn't complete")) {
3728                         ret = -EBUSY;
3729                         goto out_unlock;
3730                 }
3731
3732                 mvmvif->csa_target_freq = chsw->chandef.chan->center_freq;
3733
3734                 break;
3735         case NL80211_IFTYPE_STATION:
3736                 if (mvmvif->lqm_active)
3737                         iwl_mvm_send_lqm_cmd(vif,
3738                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3739                                              0, 0);
3740
3741                 /* Schedule the time event to a bit before beacon 1,
3742                  * to make sure we're in the new channel when the
3743                  * GO/AP arrives.
3744                  */
3745                 apply_time = chsw->device_timestamp +
3746                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3747                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3748
3749                 if (chsw->block_tx)
3750                         iwl_mvm_csa_client_absent(mvm, vif);
3751
3752                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3753                                             apply_time);
3754                 if (mvmvif->bf_data.bf_enabled) {
3755                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3756                         if (ret)
3757                                 goto out_unlock;
3758                 }
3759
3760                 break;
3761         default:
3762                 break;
3763         }
3764
3765         mvmvif->ps_disabled = true;
3766
3767         ret = iwl_mvm_power_update_ps(mvm);
3768         if (ret)
3769                 goto out_unlock;
3770
3771         /* we won't be on this channel any longer */
3772         iwl_mvm_teardown_tdls_peers(mvm);
3773
3774 out_unlock:
3775         mutex_unlock(&mvm->mutex);
3776
3777         return ret;
3778 }
3779
3780 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3781                                        struct ieee80211_vif *vif)
3782 {
3783         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3784         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3785         int ret;
3786
3787         mutex_lock(&mvm->mutex);
3788
3789         if (mvmvif->csa_failed) {
3790                 mvmvif->csa_failed = false;
3791                 ret = -EIO;
3792                 goto out_unlock;
3793         }
3794
3795         if (vif->type == NL80211_IFTYPE_STATION) {
3796                 struct iwl_mvm_sta *mvmsta;
3797
3798                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3799                                                           mvmvif->ap_sta_id);
3800
3801                 if (WARN_ON(!mvmsta)) {
3802                         ret = -EIO;
3803                         goto out_unlock;
3804                 }
3805
3806                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3807
3808                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3809
3810                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3811                 if (ret)
3812                         goto out_unlock;
3813
3814                 iwl_mvm_stop_session_protection(mvm, vif);
3815         }
3816
3817         mvmvif->ps_disabled = false;
3818
3819         ret = iwl_mvm_power_update_ps(mvm);
3820
3821 out_unlock:
3822         mutex_unlock(&mvm->mutex);
3823
3824         return ret;
3825 }
3826
3827 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3828                               struct ieee80211_vif *vif, u32 queues, bool drop)
3829 {
3830         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3831         struct iwl_mvm_vif *mvmvif;
3832         struct iwl_mvm_sta *mvmsta;
3833         struct ieee80211_sta *sta;
3834         int i;
3835         u32 msk = 0;
3836
3837         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3838                 return;
3839
3840         /* Make sure we're done with the deferred traffic before flushing */
3841         if (iwl_mvm_is_dqa_supported(mvm))
3842                 flush_work(&mvm->add_stream_wk);
3843
3844         mutex_lock(&mvm->mutex);
3845         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3846
3847         /* flush the AP-station and all TDLS peers */
3848         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3849                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3850                                                 lockdep_is_held(&mvm->mutex));
3851                 if (IS_ERR_OR_NULL(sta))
3852                         continue;
3853
3854                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3855                 if (mvmsta->vif != vif)
3856                         continue;
3857
3858                 /* make sure only TDLS peers or the AP are flushed */
3859                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3860
3861                 msk |= mvmsta->tfd_queue_msk;
3862         }
3863
3864         if (drop) {
3865                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3866                         IWL_ERR(mvm, "flush request fail\n");
3867                 mutex_unlock(&mvm->mutex);
3868         } else {
3869                 mutex_unlock(&mvm->mutex);
3870
3871                 /* this can take a while, and we may need/want other operations
3872                  * to succeed while doing this, so do it without the mutex held
3873                  */
3874                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3875         }
3876 }
3877
3878 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3879                                   struct survey_info *survey)
3880 {
3881         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3882         int ret;
3883
3884         memset(survey, 0, sizeof(*survey));
3885
3886         /* only support global statistics right now */
3887         if (idx != 0)
3888                 return -ENOENT;
3889
3890         if (!fw_has_capa(&mvm->fw->ucode_capa,
3891                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3892                 return -ENOENT;
3893
3894         mutex_lock(&mvm->mutex);
3895
3896         if (mvm->ucode_loaded) {
3897                 ret = iwl_mvm_request_statistics(mvm, false);
3898                 if (ret)
3899                         goto out;
3900         }
3901
3902         survey->filled = SURVEY_INFO_TIME |
3903                          SURVEY_INFO_TIME_RX |
3904                          SURVEY_INFO_TIME_TX |
3905                          SURVEY_INFO_TIME_SCAN;
3906         survey->time = mvm->accu_radio_stats.on_time_rf +
3907                        mvm->radio_stats.on_time_rf;
3908         do_div(survey->time, USEC_PER_MSEC);
3909
3910         survey->time_rx = mvm->accu_radio_stats.rx_time +
3911                           mvm->radio_stats.rx_time;
3912         do_div(survey->time_rx, USEC_PER_MSEC);
3913
3914         survey->time_tx = mvm->accu_radio_stats.tx_time +
3915                           mvm->radio_stats.tx_time;
3916         do_div(survey->time_tx, USEC_PER_MSEC);
3917
3918         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3919                             mvm->radio_stats.on_time_scan;
3920         do_div(survey->time_scan, USEC_PER_MSEC);
3921
3922         ret = 0;
3923  out:
3924         mutex_unlock(&mvm->mutex);
3925         return ret;
3926 }
3927
3928 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3929                                        struct ieee80211_vif *vif,
3930                                        struct ieee80211_sta *sta,
3931                                        struct station_info *sinfo)
3932 {
3933         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3934         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3935         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3936
3937         if (mvmsta->avg_energy) {
3938                 sinfo->signal_avg = mvmsta->avg_energy;
3939                 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
3940         }
3941
3942         if (!fw_has_capa(&mvm->fw->ucode_capa,
3943                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3944                 return;
3945
3946         /* if beacon filtering isn't on mac80211 does it anyway */
3947         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3948                 return;
3949
3950         if (!vif->bss_conf.assoc)
3951                 return;
3952
3953         mutex_lock(&mvm->mutex);
3954
3955         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3956                 goto unlock;
3957
3958         if (iwl_mvm_request_statistics(mvm, false))
3959                 goto unlock;
3960
3961         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3962                            mvmvif->beacon_stats.accu_num_beacons;
3963         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3964         if (mvmvif->beacon_stats.avg_signal) {
3965                 /* firmware only reports a value after RXing a few beacons */
3966                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3967                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3968         }
3969  unlock:
3970         mutex_unlock(&mvm->mutex);
3971 }
3972
3973 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
3974                                         struct ieee80211_vif *vif,
3975                                         const struct ieee80211_event *event)
3976 {
3977 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3978         do {                                                    \
3979                 if ((_cnt) && --(_cnt))                         \
3980                         break;                                  \
3981                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3982         } while (0)
3983
3984         struct iwl_fw_dbg_trigger_tlv *trig;
3985         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3986
3987         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3988                 return;
3989
3990         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3991         trig_mlme = (void *)trig->data;
3992         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3993                 return;
3994
3995         if (event->u.mlme.data == ASSOC_EVENT) {
3996                 if (event->u.mlme.status == MLME_DENIED)
3997                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3998                                            trig_mlme->stop_assoc_denied,
3999                                            "DENIED ASSOC: reason %d",
4000                                             event->u.mlme.reason);
4001                 else if (event->u.mlme.status == MLME_TIMEOUT)
4002                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4003                                            trig_mlme->stop_assoc_timeout,
4004                                            "ASSOC TIMEOUT");
4005         } else if (event->u.mlme.data == AUTH_EVENT) {
4006                 if (event->u.mlme.status == MLME_DENIED)
4007                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4008                                            trig_mlme->stop_auth_denied,
4009                                            "DENIED AUTH: reason %d",
4010                                            event->u.mlme.reason);
4011                 else if (event->u.mlme.status == MLME_TIMEOUT)
4012                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4013                                            trig_mlme->stop_auth_timeout,
4014                                            "AUTH TIMEOUT");
4015         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4016                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4017                                    trig_mlme->stop_rx_deauth,
4018                                    "DEAUTH RX %d", event->u.mlme.reason);
4019         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4020                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4021                                    trig_mlme->stop_tx_deauth,
4022                                    "DEAUTH TX %d", event->u.mlme.reason);
4023         }
4024 #undef CHECK_MLME_TRIGGER
4025 }
4026
4027 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4028                                           struct ieee80211_vif *vif,
4029                                           const struct ieee80211_event *event)
4030 {
4031         struct iwl_fw_dbg_trigger_tlv *trig;
4032         struct iwl_fw_dbg_trigger_ba *ba_trig;
4033
4034         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4035                 return;
4036
4037         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4038         ba_trig = (void *)trig->data;
4039         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4040                 return;
4041
4042         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4043                 return;
4044
4045         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4046                                     "BAR received from %pM, tid %d, ssn %d",
4047                                     event->u.ba.sta->addr, event->u.ba.tid,
4048                                     event->u.ba.ssn);
4049 }
4050
4051 static void
4052 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4053                                      struct ieee80211_vif *vif,
4054                                      const struct ieee80211_event *event)
4055 {
4056         struct iwl_fw_dbg_trigger_tlv *trig;
4057         struct iwl_fw_dbg_trigger_ba *ba_trig;
4058
4059         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4060                 return;
4061
4062         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4063         ba_trig = (void *)trig->data;
4064         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4065                 return;
4066
4067         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4068                 return;
4069
4070         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4071                                     "Frame from %pM timed out, tid %d",
4072                                     event->u.ba.sta->addr, event->u.ba.tid);
4073 }
4074
4075 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4076                                        struct ieee80211_vif *vif,
4077                                        const struct ieee80211_event *event)
4078 {
4079         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4080
4081         switch (event->type) {
4082         case MLME_EVENT:
4083                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4084                 break;
4085         case BAR_RX_EVENT:
4086                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4087                 break;
4088         case BA_FRAME_TIMEOUT:
4089                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4090                 break;
4091         default:
4092                 break;
4093         }
4094 }
4095
4096 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4097                                      struct iwl_mvm_internal_rxq_notif *notif,
4098                                      u32 size)
4099 {
4100         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(notif_waitq);
4101         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4102         int ret;
4103
4104         lockdep_assert_held(&mvm->mutex);
4105
4106         if (!iwl_mvm_has_new_rx_api(mvm))
4107                 return;
4108
4109         notif->cookie = mvm->queue_sync_cookie;
4110
4111         if (notif->sync)
4112                 atomic_set(&mvm->queue_sync_counter,
4113                            mvm->trans->num_rx_queues);
4114
4115         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4116         if (ret) {
4117                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4118                 goto out;
4119         }
4120
4121         if (notif->sync)
4122                 ret = wait_event_timeout(notif_waitq,
4123                                          atomic_read(&mvm->queue_sync_counter) == 0,
4124                                          HZ);
4125         WARN_ON_ONCE(!ret);
4126
4127 out:
4128         atomic_set(&mvm->queue_sync_counter, 0);
4129         mvm->queue_sync_cookie++;
4130 }
4131
4132 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4133 {
4134         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4135         struct iwl_mvm_internal_rxq_notif data = {
4136                 .type = IWL_MVM_RXQ_EMPTY,
4137                 .sync = 1,
4138         };
4139
4140         mutex_lock(&mvm->mutex);
4141         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4142         mutex_unlock(&mvm->mutex);
4143 }
4144
4145 const struct ieee80211_ops iwl_mvm_hw_ops = {
4146         .tx = iwl_mvm_mac_tx,
4147         .ampdu_action = iwl_mvm_mac_ampdu_action,
4148         .start = iwl_mvm_mac_start,
4149         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4150         .stop = iwl_mvm_mac_stop,
4151         .add_interface = iwl_mvm_mac_add_interface,
4152         .remove_interface = iwl_mvm_mac_remove_interface,
4153         .config = iwl_mvm_mac_config,
4154         .prepare_multicast = iwl_mvm_prepare_multicast,
4155         .configure_filter = iwl_mvm_configure_filter,
4156         .config_iface_filter = iwl_mvm_config_iface_filter,
4157         .bss_info_changed = iwl_mvm_bss_info_changed,
4158         .hw_scan = iwl_mvm_mac_hw_scan,
4159         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4160         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4161         .sta_state = iwl_mvm_mac_sta_state,
4162         .sta_notify = iwl_mvm_mac_sta_notify,
4163         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4164         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4165         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4166         .sta_rc_update = iwl_mvm_sta_rc_update,
4167         .conf_tx = iwl_mvm_mac_conf_tx,
4168         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4169         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4170         .flush = iwl_mvm_mac_flush,
4171         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4172         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4173         .set_key = iwl_mvm_mac_set_key,
4174         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4175         .remain_on_channel = iwl_mvm_roc,
4176         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4177         .add_chanctx = iwl_mvm_add_chanctx,
4178         .remove_chanctx = iwl_mvm_remove_chanctx,
4179         .change_chanctx = iwl_mvm_change_chanctx,
4180         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4181         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4182         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4183
4184         .start_ap = iwl_mvm_start_ap_ibss,
4185         .stop_ap = iwl_mvm_stop_ap_ibss,
4186         .join_ibss = iwl_mvm_start_ap_ibss,
4187         .leave_ibss = iwl_mvm_stop_ap_ibss,
4188
4189         .set_tim = iwl_mvm_set_tim,
4190
4191         .channel_switch = iwl_mvm_channel_switch,
4192         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4193         .post_channel_switch = iwl_mvm_post_channel_switch,
4194
4195         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4196         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4197         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4198
4199         .event_callback = iwl_mvm_mac_event_callback,
4200
4201         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4202
4203         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4204
4205 #ifdef CONFIG_PM_SLEEP
4206         /* look at d3.c */
4207         .suspend = iwl_mvm_suspend,
4208         .resume = iwl_mvm_resume,
4209         .set_wakeup = iwl_mvm_set_wakeup,
4210         .set_rekey_data = iwl_mvm_set_rekey_data,
4211 #if IS_ENABLED(CONFIG_IPV6)
4212         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4213 #endif
4214         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4215 #endif
4216         .get_survey = iwl_mvm_mac_get_survey,
4217         .sta_statistics = iwl_mvm_mac_sta_statistics,
4218 };