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  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
  25  *
  26  * The full GNU General Public License is included in this distribution
  27  * in the file called COPYING.
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  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  *
  39  * Redistribution and use in source and binary forms, with or without
  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.
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  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         WARN_ON(!mvm->refs[ref_type]--);
 233         spin_unlock_bh(&mvm->refs_lock);
 234         iwl_trans_unref(mvm->trans);
 235 }
 236
 237 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 238                                      enum iwl_mvm_ref_type except_ref)
 239 {
 240         int i, j;
 241
 242         if (!iwl_mvm_is_d0i3_supported(mvm))
 243                 return;
 244
 245         spin_lock_bh(&mvm->refs_lock);
 246         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 247                 if (except_ref == i || !mvm->refs[i])
 248                         continue;
 249
 250                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 251                               i, mvm->refs[i]);
 252                 for (j = 0; j < mvm->refs[i]; j++)
 253                         iwl_trans_unref(mvm->trans);
 254                 mvm->refs[i] = 0;
 255         }
 256         spin_unlock_bh(&mvm->refs_lock);
 257 }
 258
 259 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 260 {
 261         int i;
 262         bool taken = false;
 263
 264         if (!iwl_mvm_is_d0i3_supported(mvm))
 265                 return true;
 266
 267         spin_lock_bh(&mvm->refs_lock);
 268         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 269                 if (mvm->refs[i]) {
 270                         taken = true;
 271                         break;
 272                 }
 273         }
 274         spin_unlock_bh(&mvm->refs_lock);
 275
 276         return taken;
 277 }
 278
 279 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 280 {
 281         iwl_mvm_ref(mvm, ref_type);
 282
 283         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 284                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 285                                 HZ)) {
 286                 WARN_ON_ONCE(1);
 287                 iwl_mvm_unref(mvm, ref_type);
 288                 return -EIO;
 289         }
 290
 291         return 0;
 292 }
 293
 294 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 295 {
 296         int i;
 297
 298         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 299         for (i = 0; i < NUM_PHY_CTX; i++) {
 300                 mvm->phy_ctxts[i].id = i;
 301                 mvm->phy_ctxts[i].ref = 0;
 302         }
 303 }
 304
 305 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 306                                                   const char *alpha2,
 307                                                   enum iwl_mcc_source src_id,
 308                                                   bool *changed)
 309 {
 310         struct ieee80211_regdomain *regd = NULL;
 311         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 312         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 313         struct iwl_mcc_update_resp *resp;
 314
 315         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 316
 317         lockdep_assert_held(&mvm->mutex);
 318
 319         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 320         if (IS_ERR_OR_NULL(resp)) {
 321                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 322                               PTR_ERR_OR_ZERO(resp));
 323                 goto out;
 324         }
 325
 326         if (changed)
 327                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 328
 329         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 330                                       __le32_to_cpu(resp->n_channels),
 331                                       resp->channels,
 332                                       __le16_to_cpu(resp->mcc));
 333         /* Store the return source id */
 334         src_id = resp->source_id;
 335         kfree(resp);
 336         if (IS_ERR_OR_NULL(regd)) {
 337                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 338                               PTR_ERR_OR_ZERO(regd));
 339                 goto out;
 340         }
 341
 342         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 343                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 344         mvm->lar_regdom_set = true;
 345         mvm->mcc_src = src_id;
 346
 347 out:
 348         return regd;
 349 }
 350
 351 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 352 {
 353         bool changed;
 354         struct ieee80211_regdomain *regd;
 355
 356         if (!iwl_mvm_is_lar_supported(mvm))
 357                 return;
 358
 359         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 360         if (!IS_ERR_OR_NULL(regd)) {
 361                 /* only update the regulatory core if changed */
 362                 if (changed)
 363                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 364
 365                 kfree(regd);
 366         }
 367 }
 368
 369 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 370                                                           bool *changed)
 371 {
 372         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 373                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 374                                      MCC_SOURCE_GET_CURRENT :
 375                                      MCC_SOURCE_OLD_FW, changed);
 376 }
 377
 378 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 379 {
 380         enum iwl_mcc_source used_src;
 381         struct ieee80211_regdomain *regd;
 382         int ret;
 383         bool changed;
 384         const struct ieee80211_regdomain *r =
 385                         rtnl_dereference(mvm->hw->wiphy->regd);
 386
 387         if (!r)
 388                 return -ENOENT;
 389
 390         /* save the last source in case we overwrite it below */
 391         used_src = mvm->mcc_src;
 392         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 393                 /* Notify the firmware we support wifi location updates */
 394                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 395                 if (!IS_ERR_OR_NULL(regd))
 396                         kfree(regd);
 397         }
 398
 399         /* Now set our last stored MCC and source */
 400         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 401                                      &changed);
 402         if (IS_ERR_OR_NULL(regd))
 403                 return -EIO;
 404
 405         /* update cfg80211 if the regdomain was changed */
 406         if (changed)
 407                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 408         else
 409                 ret = 0;
 410
 411         kfree(regd);
 412         return ret;
 413 }
 414
 415 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 416 {
 417         struct ieee80211_hw *hw = mvm->hw;
 418         int num_mac, ret, i;
 419         static const u32 mvm_ciphers[] = {
 420                 WLAN_CIPHER_SUITE_WEP40,
 421                 WLAN_CIPHER_SUITE_WEP104,
 422                 WLAN_CIPHER_SUITE_TKIP,
 423                 WLAN_CIPHER_SUITE_CCMP,
 424         };
 425
 426         /* Tell mac80211 our characteristics */
 427         ieee80211_hw_set(hw, SIGNAL_DBM);
 428         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 429         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 430         ieee80211_hw_set(hw, QUEUE_CONTROL);
 431         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 432         ieee80211_hw_set(hw, SUPPORTS_PS);
 433         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 434         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 435         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 436         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 437         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 438         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 439         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 440         ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 441         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
 442
 443         if (mvm->trans->max_skb_frags)
 444                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 445
 446         hw->queues = mvm->first_agg_queue;
 447         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 448         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 449                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 450         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 451                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 452         hw->rate_control_algorithm = "iwl-mvm-rs";
 453         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 454         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 455
 456         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
 457         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 458         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 459         hw->wiphy->cipher_suites = mvm->ciphers;
 460
 461         /*
 462          * Enable 11w if advertised by firmware and software crypto
 463          * is not enabled (as the firmware will interpret some mgmt
 464          * packets, so enabling it with software crypto isn't safe)
 465          */
 466         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 467             !iwlwifi_mod_params.sw_crypto) {
 468                 ieee80211_hw_set(hw, MFP_CAPABLE);
 469                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 470                         WLAN_CIPHER_SUITE_AES_CMAC;
 471                 hw->wiphy->n_cipher_suites++;
 472         }
 473
 474         /* currently FW API supports only one optional cipher scheme */
 475         if (mvm->fw->cs[0].cipher) {
 476                 mvm->hw->n_cipher_schemes = 1;
 477                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 478                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 479                         mvm->fw->cs[0].cipher;
 480                 hw->wiphy->n_cipher_suites++;
 481         }
 482
 483         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 484         hw->wiphy->features |=
 485                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 486                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 487                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 488
 489         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 490         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 491         hw->chanctx_data_size = sizeof(u16);
 492
 493         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 494                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 495                 BIT(NL80211_IFTYPE_AP) |
 496                 BIT(NL80211_IFTYPE_P2P_GO) |
 497                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 498                 BIT(NL80211_IFTYPE_ADHOC);
 499
 500         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 501         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 502         if (iwl_mvm_is_lar_supported(mvm))
 503                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 504         else
 505                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 506                                                REGULATORY_DISABLE_BEACON_HINTS;
 507
 508         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 509                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 510
 511         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 512
 513         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 514         hw->wiphy->n_iface_combinations =
 515                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 516
 517         hw->wiphy->max_remain_on_channel_duration = 10000;
 518         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 519         /* we can compensate an offset of up to 3 channels = 15 MHz */
 520         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 521
 522         /* Extract MAC address */
 523         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 524         hw->wiphy->addresses = mvm->addresses;
 525         hw->wiphy->n_addresses = 1;
 526
 527         /* Extract additional MAC addresses if available */
 528         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 529                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 530
 531         for (i = 1; i < num_mac; i++) {
 532                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 533                        ETH_ALEN);
 534                 mvm->addresses[i].addr[5]++;
 535                 hw->wiphy->n_addresses++;
 536         }
 537
 538         iwl_mvm_reset_phy_ctxts(mvm);
 539
 540         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 541
 542         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 543
 544         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 545         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 546                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 547
 548         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 549                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 550         else
 551                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 552
 553         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 554                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 555                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 556         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 557                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 558                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 559
 560                 if (fw_has_capa(&mvm->fw->ucode_capa,
 561                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 562                     fw_has_api(&mvm->fw->ucode_capa,
 563                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 564                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 565                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 566         }
 567
 568         hw->wiphy->hw_version = mvm->trans->hw_id;
 569
 570         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 571                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 572         else
 573                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 574
 575         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 576         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 577         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 578         /* we create the 802.11 header and zero length SSID IE. */
 579         hw->wiphy->max_sched_scan_ie_len =
 580                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 581         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 582         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 583
 584         /*
 585          * the firmware uses u8 for num of iterations, but 0xff is saved for
 586          * infinite loop, so the maximum number of iterations is actually 254.
 587          */
 588         hw->wiphy->max_sched_scan_plan_iterations = 254;
 589
 590         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 591                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 592                                NL80211_FEATURE_P2P_GO_OPPPS |
 593                                NL80211_FEATURE_DYNAMIC_SMPS |
 594                                NL80211_FEATURE_STATIC_SMPS |
 595                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 596
 597         if (fw_has_capa(&mvm->fw->ucode_capa,
 598                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 599                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 600         if (fw_has_capa(&mvm->fw->ucode_capa,
 601                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 602                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 603
 604         if (fw_has_capa(&mvm->fw->ucode_capa,
 605                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 606                 hw->wiphy->features |=
 607                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 608
 609         if (fw_has_capa(&mvm->fw->ucode_capa,
 610                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 611                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 612
 613         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 614
 615 #ifdef CONFIG_PM_SLEEP
 616         if (iwl_mvm_is_d0i3_supported(mvm) &&
 617             device_can_wakeup(mvm->trans->dev)) {
 618                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 619                 hw->wiphy->wowlan = &mvm->wowlan;
 620         }
 621
 622         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 623             mvm->trans->ops->d3_suspend &&
 624             mvm->trans->ops->d3_resume &&
 625             device_can_wakeup(mvm->trans->dev)) {
 626                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 627                                      WIPHY_WOWLAN_DISCONNECT |
 628                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 629                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 630                                      WIPHY_WOWLAN_NET_DETECT;
 631                 if (!iwlwifi_mod_params.sw_crypto)
 632                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 633                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 634                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 635
 636                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 637                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 638                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 639                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 640                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 641                 hw->wiphy->wowlan = &mvm->wowlan;
 642         }
 643 #endif
 644
 645 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 646         /* assign default bcast filtering configuration */
 647         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 648 #endif
 649
 650         ret = iwl_mvm_leds_init(mvm);
 651         if (ret)
 652                 return ret;
 653
 654         if (fw_has_capa(&mvm->fw->ucode_capa,
 655                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 656                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 657                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 658                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 659         }
 660
 661         if (fw_has_capa(&mvm->fw->ucode_capa,
 662                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 663                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 664                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 665         }
 666
 667         hw->netdev_features |= mvm->cfg->features;
 668         if (!iwl_mvm_is_csum_supported(mvm)) {
 669                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 670                                          NETIF_F_RXCSUM);
 671                 /* We may support SW TX CSUM */
 672                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 673                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 674         }
 675
 676         ret = ieee80211_register_hw(mvm->hw);
 677         if (ret)
 678                 iwl_mvm_leds_exit(mvm);
 679
 680         return ret;
 681 }
 682
 683 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 684                              struct ieee80211_sta *sta,
 685                              struct sk_buff *skb)
 686 {
 687         struct iwl_mvm_sta *mvmsta;
 688         bool defer = false;
 689
 690         /*
 691          * double check the IN_D0I3 flag both before and after
 692          * taking the spinlock, in order to prevent taking
 693          * the spinlock when not needed.
 694          */
 695         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 696                 return false;
 697
 698         spin_lock(&mvm->d0i3_tx_lock);
 699         /*
 700          * testing the flag again ensures the skb dequeue
 701          * loop (on d0i3 exit) hasn't run yet.
 702          */
 703         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 704                 goto out;
 705
 706         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 707         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 708             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 709                 goto out;
 710
 711         __skb_queue_tail(&mvm->d0i3_tx, skb);
 712         ieee80211_stop_queues(mvm->hw);
 713
 714         /* trigger wakeup */
 715         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 716         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 717
 718         defer = true;
 719 out:
 720         spin_unlock(&mvm->d0i3_tx_lock);
 721         return defer;
 722 }
 723
 724 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 725                            struct ieee80211_tx_control *control,
 726                            struct sk_buff *skb)
 727 {
 728         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 729         struct ieee80211_sta *sta = control->sta;
 730         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 731         struct ieee80211_hdr *hdr = (void *)skb->data;
 732
 733         if (iwl_mvm_is_radio_killed(mvm)) {
 734                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 735                 goto drop;
 736         }
 737
 738         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 739             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 740             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 741                 goto drop;
 742
 743         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 744         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 745                      ieee80211_is_mgmt(hdr->frame_control) &&
 746                      !ieee80211_is_deauth(hdr->frame_control) &&
 747                      !ieee80211_is_disassoc(hdr->frame_control) &&
 748                      !ieee80211_is_action(hdr->frame_control)))
 749                 sta = NULL;
 750
 751         if (sta) {
 752                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 753                         return;
 754                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 755                         goto drop;
 756                 return;
 757         }
 758
 759         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 760                 goto drop;
 761         return;
 762  drop:
 763         ieee80211_free_txskb(hw, skb);
 764 }
 765
 766 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 767 {
 768         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 769                 return false;
 770         return true;
 771 }
 772
 773 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 774 {
 775         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 776                 return false;
 777         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 778                 return true;
 779
 780         /* enabled by default */
 781         return true;
 782 }
 783
 784 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 785         do {                                                    \
 786                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 787                         break;                                  \
 788                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 789         } while (0)
 790
 791 static void
 792 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 793                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 794                             enum ieee80211_ampdu_mlme_action action)
 795 {
 796         struct iwl_fw_dbg_trigger_tlv *trig;
 797         struct iwl_fw_dbg_trigger_ba *ba_trig;
 798
 799         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 800                 return;
 801
 802         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 803         ba_trig = (void *)trig->data;
 804
 805         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 806                 return;
 807
 808         switch (action) {
 809         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 810                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 811                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 812
 813                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 814                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 815                                  sta->addr, tid, tid_data->ssn);
 816                 break;
 817                 }
 818         case IEEE80211_AMPDU_TX_STOP_CONT:
 819                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 820                                  "TX AGG STOP: MAC %pM tid %d\n",
 821                                  sta->addr, tid);
 822                 break;
 823         case IEEE80211_AMPDU_RX_START:
 824                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 825                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 826                                  sta->addr, tid, rx_ba_ssn);
 827                 break;
 828         case IEEE80211_AMPDU_RX_STOP:
 829                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 830                                  "RX AGG STOP: MAC %pM tid %d\n",
 831                                  sta->addr, tid);
 832                 break;
 833         default:
 834                 break;
 835         }
 836 }
 837
 838 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 839                                     struct ieee80211_vif *vif,
 840                                     struct ieee80211_ampdu_params *params)
 841 {
 842         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 843         int ret;
 844         bool tx_agg_ref = false;
 845         struct ieee80211_sta *sta = params->sta;
 846         enum ieee80211_ampdu_mlme_action action = params->action;
 847         u16 tid = params->tid;
 848         u16 *ssn = &params->ssn;
 849         u8 buf_size = params->buf_size;
 850         bool amsdu = params->amsdu;
 851         u16 timeout = params->timeout;
 852
 853         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 854                      sta->addr, tid, action);
 855
 856         if (!(mvm->nvm_data->sku_cap_11n_enable))
 857                 return -EACCES;
 858
 859         /* return from D0i3 before starting a new Tx aggregation */
 860         switch (action) {
 861         case IEEE80211_AMPDU_TX_START:
 862         case IEEE80211_AMPDU_TX_STOP_CONT:
 863         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 864         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 865         case IEEE80211_AMPDU_TX_OPERATIONAL:
 866                 /*
 867                  * for tx start, wait synchronously until D0i3 exit to
 868                  * get the correct sequence number for the tid.
 869                  * additionally, some other ampdu actions use direct
 870                  * target access, which is not handled automatically
 871                  * by the trans layer (unlike commands), so wait for
 872                  * d0i3 exit in these cases as well.
 873                  */
 874                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 875                 if (ret)
 876                         return ret;
 877
 878                 tx_agg_ref = true;
 879                 break;
 880         default:
 881                 break;
 882         }
 883
 884         mutex_lock(&mvm->mutex);
 885
 886         switch (action) {
 887         case IEEE80211_AMPDU_RX_START:
 888                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 889                         ret = -EINVAL;
 890                         break;
 891                 }
 892                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 893                                          timeout);
 894                 break;
 895         case IEEE80211_AMPDU_RX_STOP:
 896                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 897                                          timeout);
 898                 break;
 899         case IEEE80211_AMPDU_TX_START:
 900                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 901                         ret = -EINVAL;
 902                         break;
 903                 }
 904                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 905                 break;
 906         case IEEE80211_AMPDU_TX_STOP_CONT:
 907                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 908                 break;
 909         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 910         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 911                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 912                 break;
 913         case IEEE80211_AMPDU_TX_OPERATIONAL:
 914                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 915                                               buf_size, amsdu);
 916                 break;
 917         default:
 918                 WARN_ON_ONCE(1);
 919                 ret = -EINVAL;
 920                 break;
 921         }
 922
 923         if (!ret) {
 924                 u16 rx_ba_ssn = 0;
 925
 926                 if (action == IEEE80211_AMPDU_RX_START)
 927                         rx_ba_ssn = *ssn;
 928
 929                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 930                                             rx_ba_ssn, action);
 931         }
 932         mutex_unlock(&mvm->mutex);
 933
 934         /*
 935          * If the tid is marked as started, we won't use it for offloaded
 936          * traffic on the next D0i3 entry. It's safe to unref.
 937          */
 938         if (tx_agg_ref)
 939                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 940
 941         return ret;
 942 }
 943
 944 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 945                                      struct ieee80211_vif *vif)
 946 {
 947         struct iwl_mvm *mvm = data;
 948         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 949
 950         mvmvif->uploaded = false;
 951         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 952
 953         spin_lock_bh(&mvm->time_event_lock);
 954         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 955         spin_unlock_bh(&mvm->time_event_lock);
 956
 957         mvmvif->phy_ctxt = NULL;
 958         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 959 }
 960
 961 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 962 {
 963         /* clear the D3 reconfig, we only need it to avoid dumping a
 964          * firmware coredump on reconfiguration, we shouldn't do that
 965          * on D3->D0 transition
 966          */
 967         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
 968                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
 969                 iwl_mvm_fw_error_dump(mvm);
 970         }
 971
 972         /* cleanup all stale references (scan, roc), but keep the
 973          * ucode_down ref until reconfig is complete
 974          */
 975         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 976
 977         iwl_mvm_stop_device(mvm);
 978
 979         mvm->scan_status = 0;
 980         mvm->ps_disabled = false;
 981         mvm->calibrating = false;
 982
 983         /* just in case one was running */
 984         iwl_mvm_cleanup_roc_te(mvm);
 985         ieee80211_remain_on_channel_expired(mvm->hw);
 986
 987         /*
 988          * cleanup all interfaces, even inactive ones, as some might have
 989          * gone down during the HW restart
 990          */
 991         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
 992
 993         mvm->p2p_device_vif = NULL;
 994         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 995
 996         iwl_mvm_reset_phy_ctxts(mvm);
 997         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 998         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 999         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1000         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1001         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1002         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1003         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1004         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1005         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1006         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1007
1008         ieee80211_wake_queues(mvm->hw);
1009
1010         /* clear any stale d0i3 state */
1011         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1012
1013         mvm->vif_count = 0;
1014         mvm->rx_ba_sessions = 0;
1015         mvm->fw_dbg_conf = FW_DBG_INVALID;
1016
1017         /* keep statistics ticking */
1018         iwl_mvm_accu_radio_stats(mvm);
1019 }
1020
1021 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1022 {
1023         int ret;
1024
1025         lockdep_assert_held(&mvm->mutex);
1026
1027         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1028                 /* Clean up some internal and mac80211 state on restart */
1029                 iwl_mvm_restart_cleanup(mvm);
1030         } else {
1031                 /* Hold the reference to prevent runtime suspend while
1032                  * the start procedure runs.  It's a bit confusing
1033                  * that the UCODE_DOWN reference is taken, but it just
1034                  * means "UCODE is not UP yet". ( TODO: rename this
1035                  * reference).
1036                  */
1037                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1038         }
1039         ret = iwl_mvm_up(mvm);
1040
1041         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1042                 /* Something went wrong - we need to finish some cleanup
1043                  * that normally iwl_mvm_mac_restart_complete() below
1044                  * would do.
1045                  */
1046                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1047                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1048         }
1049
1050         return ret;
1051 }
1052
1053 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1054 {
1055         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1056         int ret;
1057
1058         /* Some hw restart cleanups must not hold the mutex */
1059         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1060                 /*
1061                  * Make sure we are out of d0i3. This is needed
1062                  * to make sure the reference accounting is correct
1063                  * (and there is no stale d0i3_exit_work).
1064                  */
1065                 wait_event_timeout(mvm->d0i3_exit_waitq,
1066                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1067                                              &mvm->status),
1068                                    HZ);
1069         }
1070
1071         mutex_lock(&mvm->mutex);
1072         ret = __iwl_mvm_mac_start(mvm);
1073         mutex_unlock(&mvm->mutex);
1074
1075         return ret;
1076 }
1077
1078 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1079 {
1080         int ret;
1081
1082         mutex_lock(&mvm->mutex);
1083
1084         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1085         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1086         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1087         if (ret)
1088                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1089                         ret);
1090
1091         /* allow transport/FW low power modes */
1092         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1093
1094         /*
1095          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1096          * of packets the FW sent out, so we must reconnect.
1097          */
1098         iwl_mvm_teardown_tdls_peers(mvm);
1099
1100         mutex_unlock(&mvm->mutex);
1101 }
1102
1103 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1104 {
1105         if (iwl_mvm_is_d0i3_supported(mvm) &&
1106             iwl_mvm_enter_d0i3_on_suspend(mvm))
1107                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1108                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1109                                                         &mvm->status),
1110                                               HZ),
1111                           "D0i3 exit on resume timed out\n");
1112 }
1113
1114 static void
1115 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1116                               enum ieee80211_reconfig_type reconfig_type)
1117 {
1118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1119
1120         switch (reconfig_type) {
1121         case IEEE80211_RECONFIG_TYPE_RESTART:
1122                 iwl_mvm_restart_complete(mvm);
1123                 break;
1124         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1125                 iwl_mvm_resume_complete(mvm);
1126                 break;
1127         }
1128 }
1129
1130 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1131 {
1132         lockdep_assert_held(&mvm->mutex);
1133
1134         /* firmware counters are obviously reset now, but we shouldn't
1135          * partially track so also clear the fw_reset_accu counters.
1136          */
1137         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1138
1139         /* async_handlers_wk is now blocked */
1140
1141         /*
1142          * The work item could be running or queued if the
1143          * ROC time event stops just as we get here.
1144          */
1145         flush_work(&mvm->roc_done_wk);
1146
1147         iwl_mvm_stop_device(mvm);
1148
1149         iwl_mvm_async_handlers_purge(mvm);
1150         /* async_handlers_list is empty and will stay empty: HW is stopped */
1151
1152         /* the fw is stopped, the aux sta is dead: clean up driver state */
1153         iwl_mvm_del_aux_sta(mvm);
1154
1155         iwl_free_fw_paging(mvm);
1156
1157         /*
1158          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1159          * won't be called in this case).
1160          * But make sure to cleanup interfaces that have gone down before/during
1161          * HW restart was requested.
1162          */
1163         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1164                 ieee80211_iterate_interfaces(mvm->hw, 0,
1165                                              iwl_mvm_cleanup_iterator, mvm);
1166
1167         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1168          * make sure there's nothing left there and warn if any is found.
1169          */
1170         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1171                 int i;
1172
1173                 for (i = 0; i < mvm->max_scans; i++) {
1174                         if (WARN_ONCE(mvm->scan_uid_status[i],
1175                                       "UMAC scan UID %d status was not cleaned\n",
1176                                       i))
1177                                 mvm->scan_uid_status[i] = 0;
1178                 }
1179         }
1180 }
1181
1182 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1183 {
1184         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1185
1186         flush_work(&mvm->d0i3_exit_work);
1187         flush_work(&mvm->async_handlers_wk);
1188         flush_work(&mvm->add_stream_wk);
1189         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1190         iwl_mvm_free_fw_dump_desc(mvm);
1191
1192         mutex_lock(&mvm->mutex);
1193         __iwl_mvm_mac_stop(mvm);
1194         mutex_unlock(&mvm->mutex);
1195
1196         /*
1197          * The worker might have been waiting for the mutex, let it run and
1198          * discover that its list is now empty.
1199          */
1200         cancel_work_sync(&mvm->async_handlers_wk);
1201 }
1202
1203 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1204 {
1205         u16 i;
1206
1207         lockdep_assert_held(&mvm->mutex);
1208
1209         for (i = 0; i < NUM_PHY_CTX; i++)
1210                 if (!mvm->phy_ctxts[i].ref)
1211                         return &mvm->phy_ctxts[i];
1212
1213         IWL_ERR(mvm, "No available PHY context\n");
1214         return NULL;
1215 }
1216
1217 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1218                                 s16 tx_power)
1219 {
1220         struct iwl_dev_tx_power_cmd cmd = {
1221                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1222                 .v2.mac_context_id =
1223                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1224                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1225         };
1226         int len = sizeof(cmd);
1227
1228         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1229                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1230
1231         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1232                 len = sizeof(cmd.v2);
1233
1234         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1235 }
1236
1237 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1238                                      struct ieee80211_vif *vif)
1239 {
1240         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1241         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1242         int ret;
1243
1244         mvmvif->mvm = mvm;
1245
1246         /*
1247          * make sure D0i3 exit is completed, otherwise a target access
1248          * during tx queue configuration could be done when still in
1249          * D0i3 state.
1250          */
1251         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1252         if (ret)
1253                 return ret;
1254
1255         /*
1256          * Not much to do here. The stack will not allow interface
1257          * types or combinations that we didn't advertise, so we
1258          * don't really have to check the types.
1259          */
1260
1261         mutex_lock(&mvm->mutex);
1262
1263         /* make sure that beacon statistics don't go backwards with FW reset */
1264         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1265                 mvmvif->beacon_stats.accu_num_beacons +=
1266                         mvmvif->beacon_stats.num_beacons;
1267
1268         /* Allocate resources for the MAC context, and add it to the fw  */
1269         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1270         if (ret)
1271                 goto out_unlock;
1272
1273         /* Counting number of interfaces is needed for legacy PM */
1274         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1275                 mvm->vif_count++;
1276
1277         /*
1278          * The AP binding flow can be done only after the beacon
1279          * template is configured (which happens only in the mac80211
1280          * start_ap() flow), and adding the broadcast station can happen
1281          * only after the binding.
1282          * In addition, since modifying the MAC before adding a bcast
1283          * station is not allowed by the FW, delay the adding of MAC context to
1284          * the point where we can also add the bcast station.
1285          * In short: there's not much we can do at this point, other than
1286          * allocating resources :)
1287          */
1288         if (vif->type == NL80211_IFTYPE_AP ||
1289             vif->type == NL80211_IFTYPE_ADHOC) {
1290                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1291                 if (ret) {
1292                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1293                         goto out_release;
1294                 }
1295
1296                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1297                 goto out_unlock;
1298         }
1299
1300         mvmvif->features |= hw->netdev_features;
1301
1302         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1303         if (ret)
1304                 goto out_release;
1305
1306         ret = iwl_mvm_power_update_mac(mvm);
1307         if (ret)
1308                 goto out_remove_mac;
1309
1310         /* beacon filtering */
1311         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1312         if (ret)
1313                 goto out_remove_mac;
1314
1315         if (!mvm->bf_allowed_vif &&
1316             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1317                 mvm->bf_allowed_vif = mvmvif;
1318                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1319                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1320         }
1321
1322         /*
1323          * P2P_DEVICE interface does not have a channel context assigned to it,
1324          * so a dedicated PHY context is allocated to it and the corresponding
1325          * MAC context is bound to it at this stage.
1326          */
1327         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1328
1329                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1330                 if (!mvmvif->phy_ctxt) {
1331                         ret = -ENOSPC;
1332                         goto out_free_bf;
1333                 }
1334
1335                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1336                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1337                 if (ret)
1338                         goto out_unref_phy;
1339
1340                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1341                 if (ret)
1342                         goto out_unbind;
1343
1344                 /* Save a pointer to p2p device vif, so it can later be used to
1345                  * update the p2p device MAC when a GO is started/stopped */
1346                 mvm->p2p_device_vif = vif;
1347         }
1348
1349         iwl_mvm_vif_dbgfs_register(mvm, vif);
1350         goto out_unlock;
1351
1352  out_unbind:
1353         iwl_mvm_binding_remove_vif(mvm, vif);
1354  out_unref_phy:
1355         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1356  out_free_bf:
1357         if (mvm->bf_allowed_vif == mvmvif) {
1358                 mvm->bf_allowed_vif = NULL;
1359                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1360                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1361         }
1362  out_remove_mac:
1363         mvmvif->phy_ctxt = NULL;
1364         iwl_mvm_mac_ctxt_remove(mvm, vif);
1365  out_release:
1366         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1367                 mvm->vif_count--;
1368
1369         iwl_mvm_mac_ctxt_release(mvm, vif);
1370  out_unlock:
1371         mutex_unlock(&mvm->mutex);
1372
1373         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1374
1375         return ret;
1376 }
1377
1378 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1379                                         struct ieee80211_vif *vif)
1380 {
1381         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1382
1383         if (tfd_msk) {
1384                 /*
1385                  * mac80211 first removes all the stations of the vif and
1386                  * then removes the vif. When it removes a station it also
1387                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1388                  * of all the stations of this vif are closed, and the queues
1389                  * of these AMPDU sessions are properly closed.
1390                  * We still need to take care of the shared queues of the vif.
1391                  * Flush them here.
1392                  */
1393                 mutex_lock(&mvm->mutex);
1394                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1395                 mutex_unlock(&mvm->mutex);
1396
1397                 /*
1398                  * There are transports that buffer a few frames in the host.
1399                  * For these, the flush above isn't enough since while we were
1400                  * flushing, the transport might have sent more frames to the
1401                  * device. To solve this, wait here until the transport is
1402                  * empty. Technically, this could have replaced the flush
1403                  * above, but flush is much faster than draining. So flush
1404                  * first, and drain to make sure we have no frames in the
1405                  * transport anymore.
1406                  * If a station still had frames on the shared queues, it is
1407                  * already marked as draining, so to complete the draining, we
1408                  * just need to wait until the transport is empty.
1409                  */
1410                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1411         }
1412
1413         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1414                 /*
1415                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1416                  * We assume here that all the packets sent to the OFFCHANNEL
1417                  * queue are sent in ROC session.
1418                  */
1419                 flush_work(&mvm->roc_done_wk);
1420         } else {
1421                 /*
1422                  * By now, all the AC queues are empty. The AGG queues are
1423                  * empty too. We already got all the Tx responses for all the
1424                  * packets in the queues. The drain work can have been
1425                  * triggered. Flush it.
1426                  */
1427                 flush_work(&mvm->sta_drained_wk);
1428         }
1429 }
1430
1431 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1432                                          struct ieee80211_vif *vif)
1433 {
1434         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1435         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1436
1437         iwl_mvm_prepare_mac_removal(mvm, vif);
1438
1439         mutex_lock(&mvm->mutex);
1440
1441         if (mvm->bf_allowed_vif == mvmvif) {
1442                 mvm->bf_allowed_vif = NULL;
1443                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1444                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1445         }
1446
1447         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1448
1449         /*
1450          * For AP/GO interface, the tear down of the resources allocated to the
1451          * interface is be handled as part of the stop_ap flow.
1452          */
1453         if (vif->type == NL80211_IFTYPE_AP ||
1454             vif->type == NL80211_IFTYPE_ADHOC) {
1455 #ifdef CONFIG_NL80211_TESTMODE
1456                 if (vif == mvm->noa_vif) {
1457                         mvm->noa_vif = NULL;
1458                         mvm->noa_duration = 0;
1459                 }
1460 #endif
1461                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1462                 goto out_release;
1463         }
1464
1465         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1466                 mvm->p2p_device_vif = NULL;
1467                 iwl_mvm_rm_bcast_sta(mvm, vif);
1468                 iwl_mvm_binding_remove_vif(mvm, vif);
1469                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1470                 mvmvif->phy_ctxt = NULL;
1471         }
1472
1473         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1474                 mvm->vif_count--;
1475
1476         iwl_mvm_power_update_mac(mvm);
1477         iwl_mvm_mac_ctxt_remove(mvm, vif);
1478
1479 out_release:
1480         iwl_mvm_mac_ctxt_release(mvm, vif);
1481         mutex_unlock(&mvm->mutex);
1482 }
1483
1484 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1485 {
1486         return 0;
1487 }
1488
1489 struct iwl_mvm_mc_iter_data {
1490         struct iwl_mvm *mvm;
1491         int port_id;
1492 };
1493
1494 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1495                                       struct ieee80211_vif *vif)
1496 {
1497         struct iwl_mvm_mc_iter_data *data = _data;
1498         struct iwl_mvm *mvm = data->mvm;
1499         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1500         int ret, len;
1501
1502         /* if we don't have free ports, mcast frames will be dropped */
1503         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1504                 return;
1505
1506         if (vif->type != NL80211_IFTYPE_STATION ||
1507             !vif->bss_conf.assoc)
1508                 return;
1509
1510         cmd->port_id = data->port_id++;
1511         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1512         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1513
1514         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1515         if (ret)
1516                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1517 }
1518
1519 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1520 {
1521         struct iwl_mvm_mc_iter_data iter_data = {
1522                 .mvm = mvm,
1523         };
1524
1525         lockdep_assert_held(&mvm->mutex);
1526
1527         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1528                 return;
1529
1530         ieee80211_iterate_active_interfaces_atomic(
1531                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1532                 iwl_mvm_mc_iface_iterator, &iter_data);
1533 }
1534
1535 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1536                                      struct netdev_hw_addr_list *mc_list)
1537 {
1538         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1539         struct iwl_mcast_filter_cmd *cmd;
1540         struct netdev_hw_addr *addr;
1541         int addr_count;
1542         bool pass_all;
1543         int len;
1544
1545         addr_count = netdev_hw_addr_list_count(mc_list);
1546         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1547                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1548         if (pass_all)
1549                 addr_count = 0;
1550
1551         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1552         cmd = kzalloc(len, GFP_ATOMIC);
1553         if (!cmd)
1554                 return 0;
1555
1556         if (pass_all) {
1557                 cmd->pass_all = 1;
1558                 return (u64)(unsigned long)cmd;
1559         }
1560
1561         netdev_hw_addr_list_for_each(addr, mc_list) {
1562                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1563                                    cmd->count, addr->addr);
1564                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1565                        addr->addr, ETH_ALEN);
1566                 cmd->count++;
1567         }
1568
1569         return (u64)(unsigned long)cmd;
1570 }
1571
1572 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1573                                      unsigned int changed_flags,
1574                                      unsigned int *total_flags,
1575                                      u64 multicast)
1576 {
1577         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1578         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1579
1580         mutex_lock(&mvm->mutex);
1581
1582         /* replace previous configuration */
1583         kfree(mvm->mcast_filter_cmd);
1584         mvm->mcast_filter_cmd = cmd;
1585
1586         if (!cmd)
1587                 goto out;
1588
1589         iwl_mvm_recalc_multicast(mvm);
1590 out:
1591         mutex_unlock(&mvm->mutex);
1592         *total_flags = 0;
1593 }
1594
1595 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1596                                         struct ieee80211_vif *vif,
1597                                         unsigned int filter_flags,
1598                                         unsigned int changed_flags)
1599 {
1600         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1601
1602         /* We support only filter for probe requests */
1603         if (!(changed_flags & FIF_PROBE_REQ))
1604                 return;
1605
1606         /* Supported only for p2p client interfaces */
1607         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1608             !vif->p2p)
1609                 return;
1610
1611         mutex_lock(&mvm->mutex);
1612         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1613         mutex_unlock(&mvm->mutex);
1614 }
1615
1616 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1617 struct iwl_bcast_iter_data {
1618         struct iwl_mvm *mvm;
1619         struct iwl_bcast_filter_cmd *cmd;
1620         u8 current_filter;
1621 };
1622
1623 static void
1624 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1625                          const struct iwl_fw_bcast_filter *in_filter,
1626                          struct iwl_fw_bcast_filter *out_filter)
1627 {
1628         struct iwl_fw_bcast_filter_attr *attr;
1629         int i;
1630
1631         memcpy(out_filter, in_filter, sizeof(*out_filter));
1632
1633         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1634                 attr = &out_filter->attrs[i];
1635
1636                 if (!attr->mask)
1637                         break;
1638
1639                 switch (attr->reserved1) {
1640                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1641                         if (vif->bss_conf.arp_addr_cnt != 1) {
1642                                 attr->mask = 0;
1643                                 continue;
1644                         }
1645
1646                         attr->val = vif->bss_conf.arp_addr_list[0];
1647                         break;
1648                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1649                         attr->val = *(__be32 *)&vif->addr[2];
1650                         break;
1651                 default:
1652                         break;
1653                 }
1654                 attr->reserved1 = 0;
1655                 out_filter->num_attrs++;
1656         }
1657 }
1658
1659 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1660                                           struct ieee80211_vif *vif)
1661 {
1662         struct iwl_bcast_iter_data *data = _data;
1663         struct iwl_mvm *mvm = data->mvm;
1664         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1665         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1666         struct iwl_fw_bcast_mac *bcast_mac;
1667         int i;
1668
1669         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1670                 return;
1671
1672         bcast_mac = &cmd->macs[mvmvif->id];
1673
1674         /*
1675          * enable filtering only for associated stations, but not for P2P
1676          * Clients
1677          */
1678         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1679             !vif->bss_conf.assoc)
1680                 return;
1681
1682         bcast_mac->default_discard = 1;
1683
1684         /* copy all configured filters */
1685         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1686                 /*
1687                  * Make sure we don't exceed our filters limit.
1688                  * if there is still a valid filter to be configured,
1689                  * be on the safe side and just allow bcast for this mac.
1690                  */
1691                 if (WARN_ON_ONCE(data->current_filter >=
1692                                  ARRAY_SIZE(cmd->filters))) {
1693                         bcast_mac->default_discard = 0;
1694                         bcast_mac->attached_filters = 0;
1695                         break;
1696                 }
1697
1698                 iwl_mvm_set_bcast_filter(vif,
1699                                          &mvm->bcast_filters[i],
1700                                          &cmd->filters[data->current_filter]);
1701
1702                 /* skip current filter if it contains no attributes */
1703                 if (!cmd->filters[data->current_filter].num_attrs)
1704                         continue;
1705
1706                 /* attach the filter to current mac */
1707                 bcast_mac->attached_filters |=
1708                                 cpu_to_le16(BIT(data->current_filter));
1709
1710                 data->current_filter++;
1711         }
1712 }
1713
1714 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1715                                     struct iwl_bcast_filter_cmd *cmd)
1716 {
1717         struct iwl_bcast_iter_data iter_data = {
1718                 .mvm = mvm,
1719                 .cmd = cmd,
1720         };
1721
1722         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1723                 return false;
1724
1725         memset(cmd, 0, sizeof(*cmd));
1726         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1727         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1728
1729 #ifdef CONFIG_IWLWIFI_DEBUGFS
1730         /* use debugfs filters/macs if override is configured */
1731         if (mvm->dbgfs_bcast_filtering.override) {
1732                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1733                        sizeof(cmd->filters));
1734                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1735                        sizeof(cmd->macs));
1736                 return true;
1737         }
1738 #endif
1739
1740         /* if no filters are configured, do nothing */
1741         if (!mvm->bcast_filters)
1742                 return false;
1743
1744         /* configure and attach these filters for each associated sta vif */
1745         ieee80211_iterate_active_interfaces(
1746                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1747                 iwl_mvm_bcast_filter_iterator, &iter_data);
1748
1749         return true;
1750 }
1751
1752 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1753 {
1754         struct iwl_bcast_filter_cmd cmd;
1755
1756         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1757                 return 0;
1758
1759         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1760                 return 0;
1761
1762         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1763                                     sizeof(cmd), &cmd);
1764 }
1765 #else
1766 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1767 {
1768         return 0;
1769 }
1770 #endif
1771
1772 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1773                                     struct ieee80211_vif *vif)
1774 {
1775         struct iwl_mu_group_mgmt_cmd cmd = {};
1776
1777         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1778                WLAN_MEMBERSHIP_LEN);
1779         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1780                WLAN_USER_POSITION_LEN);
1781
1782         return iwl_mvm_send_cmd_pdu(mvm,
1783                                     WIDE_ID(DATA_PATH_GROUP,
1784                                             UPDATE_MU_GROUPS_CMD),
1785                                     0, sizeof(cmd), &cmd);
1786 }
1787
1788 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1789                                            struct ieee80211_vif *vif)
1790 {
1791         if (vif->mu_mimo_owner) {
1792                 struct iwl_mu_group_mgmt_notif *notif = _data;
1793
1794                 /*
1795                  * MU-MIMO Group Id action frame is little endian. We treat
1796                  * the data received from firmware as if it came from the
1797                  * action frame, so no conversion is needed.
1798                  */
1799                 ieee80211_update_mu_groups(vif,
1800                                            (u8 *)&notif->membership_status,
1801                                            (u8 *)&notif->user_position);
1802         }
1803 }
1804
1805 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1806                                struct iwl_rx_cmd_buffer *rxb)
1807 {
1808         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1809         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1810
1811         ieee80211_iterate_active_interfaces_atomic(
1812                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1813                         iwl_mvm_mu_mimo_iface_iterator, notif);
1814 }
1815
1816 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1817                                              struct ieee80211_vif *vif,
1818                                              struct ieee80211_bss_conf *bss_conf,
1819                                              u32 changes)
1820 {
1821         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1822         int ret;
1823
1824         /*
1825          * Re-calculate the tsf id, as the master-slave relations depend on the
1826          * beacon interval, which was not known when the station interface was
1827          * added.
1828          */
1829         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1830                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1831
1832         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1833             mvmvif->lqm_active)
1834                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1835                                      0, 0);
1836
1837         /*
1838          * If we're not associated yet, take the (new) BSSID before associating
1839          * so the firmware knows. If we're already associated, then use the old
1840          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1841          * branch for disassociation below.
1842          */
1843         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1844                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1845
1846         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1847         if (ret)
1848                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1849
1850         /* after sending it once, adopt mac80211 data */
1851         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1852         mvmvif->associated = bss_conf->assoc;
1853
1854         if (changes & BSS_CHANGED_ASSOC) {
1855                 if (bss_conf->assoc) {
1856                         /* clear statistics to get clean beacon counter */
1857                         iwl_mvm_request_statistics(mvm, true);
1858                         memset(&mvmvif->beacon_stats, 0,
1859                                sizeof(mvmvif->beacon_stats));
1860
1861                         /* add quota for this interface */
1862                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1863                         if (ret) {
1864                                 IWL_ERR(mvm, "failed to update quotas\n");
1865                                 return;
1866                         }
1867
1868                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1869                                      &mvm->status)) {
1870                                 /*
1871                                  * If we're restarting then the firmware will
1872                                  * obviously have lost synchronisation with
1873                                  * the AP. It will attempt to synchronise by
1874                                  * itself, but we can make it more reliable by
1875                                  * scheduling a session protection time event.
1876                                  *
1877                                  * The firmware needs to receive a beacon to
1878                                  * catch up with synchronisation, use 110% of
1879                                  * the beacon interval.
1880                                  *
1881                                  * Set a large maximum delay to allow for more
1882                                  * than a single interface.
1883                                  */
1884                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1885                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1886                                                         5 * dur, false);
1887                         }
1888
1889                         iwl_mvm_sf_update(mvm, vif, false);
1890                         iwl_mvm_power_vif_assoc(mvm, vif);
1891                         if (vif->p2p) {
1892                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1893                                 iwl_mvm_update_smps(mvm, vif,
1894                                                     IWL_MVM_SMPS_REQ_PROT,
1895                                                     IEEE80211_SMPS_DYNAMIC);
1896                         }
1897                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1898                         /*
1899                          * If update fails - SF might be running in associated
1900                          * mode while disassociated - which is forbidden.
1901                          */
1902                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1903                                   "Failed to update SF upon disassociation\n");
1904
1905                         /* remove AP station now that the MAC is unassoc */
1906                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1907                         if (ret)
1908                                 IWL_ERR(mvm, "failed to remove AP station\n");
1909
1910                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1911                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1912                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1913                         /* remove quota for this interface */
1914                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1915                         if (ret)
1916                                 IWL_ERR(mvm, "failed to update quotas\n");
1917
1918                         if (vif->p2p)
1919                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1920
1921                         /* this will take the cleared BSSID from bss_conf */
1922                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1923                         if (ret)
1924                                 IWL_ERR(mvm,
1925                                         "failed to update MAC %pM (clear after unassoc)\n",
1926                                         vif->addr);
1927                 }
1928
1929                 /*
1930                  * The firmware tracks the MU-MIMO group on its own.
1931                  * However, on HW restart we should restore this data.
1932                  */
1933                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1934                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1935                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1936                         if (ret)
1937                                 IWL_ERR(mvm,
1938                                         "failed to update VHT MU_MIMO groups\n");
1939                 }
1940
1941                 iwl_mvm_recalc_multicast(mvm);
1942                 iwl_mvm_configure_bcast_filter(mvm);
1943
1944                 /* reset rssi values */
1945                 mvmvif->bf_data.ave_beacon_signal = 0;
1946
1947                 iwl_mvm_bt_coex_vif_change(mvm);
1948                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1949                                     IEEE80211_SMPS_AUTOMATIC);
1950                 if (fw_has_capa(&mvm->fw->ucode_capa,
1951                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1952                         iwl_mvm_config_scan(mvm);
1953         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1954                 /*
1955                  * We received a beacon _after_ association so
1956                  * remove the session protection.
1957                  */
1958                 iwl_mvm_remove_time_event(mvm, mvmvif,
1959                                           &mvmvif->time_event_data);
1960         }
1961
1962         if (changes & BSS_CHANGED_BEACON_INFO) {
1963                 iwl_mvm_sf_update(mvm, vif, false);
1964                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1965         }
1966
1967         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
1968                        /*
1969                         * Send power command on every beacon change,
1970                         * because we may have not enabled beacon abort yet.
1971                         */
1972                        BSS_CHANGED_BEACON_INFO)) {
1973                 ret = iwl_mvm_power_update_mac(mvm);
1974                 if (ret)
1975                         IWL_ERR(mvm, "failed to update power mode\n");
1976         }
1977
1978         if (changes & BSS_CHANGED_TXPOWER) {
1979                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1980                                 bss_conf->txpower);
1981                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1982         }
1983
1984         if (changes & BSS_CHANGED_CQM) {
1985                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1986                 /* reset cqm events tracking */
1987                 mvmvif->bf_data.last_cqm_event = 0;
1988                 if (mvmvif->bf_data.bf_enabled) {
1989                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1990                         if (ret)
1991                                 IWL_ERR(mvm,
1992                                         "failed to update CQM thresholds\n");
1993                 }
1994         }
1995
1996         if (changes & BSS_CHANGED_ARP_FILTER) {
1997                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1998                 iwl_mvm_configure_bcast_filter(mvm);
1999         }
2000 }
2001
2002 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2003                                  struct ieee80211_vif *vif)
2004 {
2005         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2006         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2007         int ret;
2008
2009         /*
2010          * iwl_mvm_mac_ctxt_add() might read directly from the device
2011          * (the system time), so make sure it is available.
2012          */
2013         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2014         if (ret)
2015                 return ret;
2016
2017         mutex_lock(&mvm->mutex);
2018
2019         /* Send the beacon template */
2020         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2021         if (ret)
2022                 goto out_unlock;
2023
2024         /*
2025          * Re-calculate the tsf id, as the master-slave relations depend on the
2026          * beacon interval, which was not known when the AP interface was added.
2027          */
2028         if (vif->type == NL80211_IFTYPE_AP)
2029                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2030
2031         mvmvif->ap_assoc_sta_count = 0;
2032
2033         /* Add the mac context */
2034         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2035         if (ret)
2036                 goto out_unlock;
2037
2038         /* Perform the binding */
2039         ret = iwl_mvm_binding_add_vif(mvm, vif);
2040         if (ret)
2041                 goto out_remove;
2042
2043         /* Send the bcast station. At this stage the TBTT and DTIM time events
2044          * are added and applied to the scheduler */
2045         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2046         if (ret)
2047                 goto out_unbind;
2048
2049         /* must be set before quota calculations */
2050         mvmvif->ap_ibss_active = true;
2051
2052         /* power updated needs to be done before quotas */
2053         iwl_mvm_power_update_mac(mvm);
2054
2055         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2056         if (ret)
2057                 goto out_quota_failed;
2058
2059         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2060         if (vif->p2p && mvm->p2p_device_vif)
2061                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2062
2063         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2064
2065         iwl_mvm_bt_coex_vif_change(mvm);
2066
2067         /* we don't support TDLS during DCM */
2068         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2069                 iwl_mvm_teardown_tdls_peers(mvm);
2070
2071         goto out_unlock;
2072
2073 out_quota_failed:
2074         iwl_mvm_power_update_mac(mvm);
2075         mvmvif->ap_ibss_active = false;
2076         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2077 out_unbind:
2078         iwl_mvm_binding_remove_vif(mvm, vif);
2079 out_remove:
2080         iwl_mvm_mac_ctxt_remove(mvm, vif);
2081 out_unlock:
2082         mutex_unlock(&mvm->mutex);
2083         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2084         return ret;
2085 }
2086
2087 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2088                                  struct ieee80211_vif *vif)
2089 {
2090         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2091         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2092
2093         iwl_mvm_prepare_mac_removal(mvm, vif);
2094
2095         mutex_lock(&mvm->mutex);
2096
2097         /* Handle AP stop while in CSA */
2098         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2099                 iwl_mvm_remove_time_event(mvm, mvmvif,
2100                                           &mvmvif->time_event_data);
2101                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2102                 mvmvif->csa_countdown = false;
2103         }
2104
2105         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2106                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2107                 mvm->csa_tx_block_bcn_timeout = 0;
2108         }
2109
2110         mvmvif->ap_ibss_active = false;
2111         mvm->ap_last_beacon_gp2 = 0;
2112
2113         iwl_mvm_bt_coex_vif_change(mvm);
2114
2115         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2116
2117         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2118         if (vif->p2p && mvm->p2p_device_vif)
2119                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2120
2121         iwl_mvm_update_quotas(mvm, false, NULL);
2122         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2123         iwl_mvm_binding_remove_vif(mvm, vif);
2124
2125         iwl_mvm_power_update_mac(mvm);
2126
2127         iwl_mvm_mac_ctxt_remove(mvm, vif);
2128
2129         mutex_unlock(&mvm->mutex);
2130 }
2131
2132 static void
2133 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2134                                  struct ieee80211_vif *vif,
2135                                  struct ieee80211_bss_conf *bss_conf,
2136                                  u32 changes)
2137 {
2138         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2139
2140         /* Changes will be applied when the AP/IBSS is started */
2141         if (!mvmvif->ap_ibss_active)
2142                 return;
2143
2144         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2145                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2146             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2147                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2148
2149         /* Need to send a new beacon template to the FW */
2150         if (changes & BSS_CHANGED_BEACON &&
2151             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2152                 IWL_WARN(mvm, "Failed updating beacon data\n");
2153
2154         if (changes & BSS_CHANGED_TXPOWER) {
2155                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2156                                 bss_conf->txpower);
2157                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2158         }
2159 }
2160
2161 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2162                                      struct ieee80211_vif *vif,
2163                                      struct ieee80211_bss_conf *bss_conf,
2164                                      u32 changes)
2165 {
2166         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2167
2168         /*
2169          * iwl_mvm_bss_info_changed_station() might call
2170          * iwl_mvm_protect_session(), which reads directly from
2171          * the device (the system time), so make sure it is available.
2172          */
2173         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2174                 return;
2175
2176         mutex_lock(&mvm->mutex);
2177
2178         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2179                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2180
2181         switch (vif->type) {
2182         case NL80211_IFTYPE_STATION:
2183                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2184                 break;
2185         case NL80211_IFTYPE_AP:
2186         case NL80211_IFTYPE_ADHOC:
2187                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2188                 break;
2189         default:
2190                 /* shouldn't happen */
2191                 WARN_ON_ONCE(1);
2192         }
2193
2194         mutex_unlock(&mvm->mutex);
2195         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2196 }
2197
2198 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2199                                struct ieee80211_vif *vif,
2200                                struct ieee80211_scan_request *hw_req)
2201 {
2202         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2203         int ret;
2204
2205         if (hw_req->req.n_channels == 0 ||
2206             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2207                 return -EINVAL;
2208
2209         mutex_lock(&mvm->mutex);
2210         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2211         mutex_unlock(&mvm->mutex);
2212
2213         return ret;
2214 }
2215
2216 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2217                                        struct ieee80211_vif *vif)
2218 {
2219         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2220
2221         mutex_lock(&mvm->mutex);
2222
2223         /* Due to a race condition, it's possible that mac80211 asks
2224          * us to stop a hw_scan when it's already stopped.  This can
2225          * happen, for instance, if we stopped the scan ourselves,
2226          * called ieee80211_scan_completed() and the userspace called
2227          * cancel scan scan before ieee80211_scan_work() could run.
2228          * To handle that, simply return if the scan is not running.
2229         */
2230         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2231                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2232
2233         mutex_unlock(&mvm->mutex);
2234 }
2235
2236 static void
2237 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2238                                   struct ieee80211_sta *sta, u16 tids,
2239                                   int num_frames,
2240                                   enum ieee80211_frame_release_type reason,
2241                                   bool more_data)
2242 {
2243         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2244
2245         /* Called when we need to transmit (a) frame(s) from mac80211 */
2246
2247         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2248                                           tids, more_data, false);
2249 }
2250
2251 static void
2252 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2253                                     struct ieee80211_sta *sta, u16 tids,
2254                                     int num_frames,
2255                                     enum ieee80211_frame_release_type reason,
2256                                     bool more_data)
2257 {
2258         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2259
2260         /* Called when we need to transmit (a) frame(s) from agg queue */
2261
2262         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2263                                           tids, more_data, true);
2264 }
2265
2266 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2267                                    struct ieee80211_vif *vif,
2268                                    enum sta_notify_cmd cmd,
2269                                    struct ieee80211_sta *sta)
2270 {
2271         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2272         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2273         unsigned long txqs = 0, tids = 0;
2274         int tid;
2275
2276         spin_lock_bh(&mvmsta->lock);
2277         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2278                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2279
2280                 if (tid_data->state != IWL_AGG_ON &&
2281                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2282                         continue;
2283
2284                 __set_bit(tid_data->txq_id, &txqs);
2285
2286                 if (iwl_mvm_tid_queued(tid_data) == 0)
2287                         continue;
2288
2289                 __set_bit(tid, &tids);
2290         }
2291
2292         switch (cmd) {
2293         case STA_NOTIFY_SLEEP:
2294                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2295                         ieee80211_sta_block_awake(hw, sta, true);
2296
2297                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2298                         ieee80211_sta_set_buffered(sta, tid, true);
2299
2300                 if (txqs)
2301                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2302                 /*
2303                  * The fw updates the STA to be asleep. Tx packets on the Tx
2304                  * queues to this station will not be transmitted. The fw will
2305                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2306                  */
2307                 break;
2308         case STA_NOTIFY_AWAKE:
2309                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2310                         break;
2311
2312                 if (txqs)
2313                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2314                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2315                 break;
2316         default:
2317                 break;
2318         }
2319         spin_unlock_bh(&mvmsta->lock);
2320 }
2321
2322 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2323                                        struct ieee80211_vif *vif,
2324                                        struct ieee80211_sta *sta)
2325 {
2326         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2327         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2328
2329         /*
2330          * This is called before mac80211 does RCU synchronisation,
2331          * so here we already invalidate our internal RCU-protected
2332          * station pointer. The rest of the code will thus no longer
2333          * be able to find the station this way, and we don't rely
2334          * on further RCU synchronisation after the sta_state()
2335          * callback deleted the station.
2336          */
2337         mutex_lock(&mvm->mutex);
2338         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2339                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2340                                    ERR_PTR(-ENOENT));
2341
2342         mutex_unlock(&mvm->mutex);
2343 }
2344
2345 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2346                                 const u8 *bssid)
2347 {
2348         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2349                 return;
2350
2351         if (vif->p2p && !iwl_mvm_is_p2p_standalone_uapsd_supported(mvm)) {
2352                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2353                 return;
2354         }
2355
2356         if (!vif->p2p &&
2357             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2358                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2359                 return;
2360         }
2361
2362         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2363 }
2364
2365 static void
2366 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2367                            struct ieee80211_vif *vif, u8 *peer_addr,
2368                            enum nl80211_tdls_operation action)
2369 {
2370         struct iwl_fw_dbg_trigger_tlv *trig;
2371         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2372
2373         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2374                 return;
2375
2376         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2377         tdls_trig = (void *)trig->data;
2378         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2379                 return;
2380
2381         if (!(tdls_trig->action_bitmap & BIT(action)))
2382                 return;
2383
2384         if (tdls_trig->peer_mode &&
2385             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2386                 return;
2387
2388         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2389                                     "TDLS event occurred, peer %pM, action %d",
2390                                     peer_addr, action);
2391 }
2392
2393 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2394                                              struct iwl_mvm_sta *mvm_sta)
2395 {
2396         struct iwl_mvm_tid_data *tid_data;
2397         struct sk_buff *skb;
2398         int i;
2399
2400         spin_lock_bh(&mvm_sta->lock);
2401         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2402                 tid_data = &mvm_sta->tid_data[i];
2403                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2404                         ieee80211_free_txskb(mvm->hw, skb);
2405         }
2406         spin_unlock_bh(&mvm_sta->lock);
2407 }
2408
2409 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2410                                  struct ieee80211_vif *vif,
2411                                  struct ieee80211_sta *sta,
2412                                  enum ieee80211_sta_state old_state,
2413                                  enum ieee80211_sta_state new_state)
2414 {
2415         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2416         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2417         int ret;
2418
2419         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2420                            sta->addr, old_state, new_state);
2421
2422         /* this would be a mac80211 bug ... but don't crash */
2423         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2424                 return -EINVAL;
2425
2426         /* if a STA is being removed, reuse its ID */
2427         flush_work(&mvm->sta_drained_wk);
2428
2429         /*
2430          * If we are in a STA removal flow and in DQA mode:
2431          *
2432          * This is after the sync_rcu part, so the queues have already been
2433          * flushed. No more TXs on their way in mac80211's path, and no more in
2434          * the queues.
2435          * Also, we won't be getting any new TX frames for this station.
2436          * What we might have are deferred TX frames that need to be taken care
2437          * of.
2438          *
2439          * Drop any still-queued deferred-frame before removing the STA, and
2440          * make sure the worker is no longer handling frames for this STA.
2441          */
2442         if (old_state == IEEE80211_STA_NONE &&
2443             new_state == IEEE80211_STA_NOTEXIST &&
2444             iwl_mvm_is_dqa_supported(mvm)) {
2445                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2446
2447                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2448                 flush_work(&mvm->add_stream_wk);
2449
2450                 /*
2451                  * No need to make sure deferred TX indication is off since the
2452                  * worker will already remove it if it was on
2453                  */
2454         }
2455
2456         mutex_lock(&mvm->mutex);
2457         if (old_state == IEEE80211_STA_NOTEXIST &&
2458             new_state == IEEE80211_STA_NONE) {
2459                 /*
2460                  * Firmware bug - it'll crash if the beacon interval is less
2461                  * than 16. We can't avoid connecting at all, so refuse the
2462                  * station state change, this will cause mac80211 to abandon
2463                  * attempts to connect to this AP, and eventually wpa_s will
2464                  * blacklist the AP...
2465                  */
2466                 if (vif->type == NL80211_IFTYPE_STATION &&
2467                     vif->bss_conf.beacon_int < 16) {
2468                         IWL_ERR(mvm,
2469                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2470                                 sta->addr, vif->bss_conf.beacon_int);
2471                         ret = -EINVAL;
2472                         goto out_unlock;
2473                 }
2474
2475                 if (sta->tdls &&
2476                     (vif->p2p ||
2477                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2478                                                 IWL_MVM_TDLS_STA_COUNT ||
2479                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2480                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2481                         ret = -EBUSY;
2482                         goto out_unlock;
2483                 }
2484
2485                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2486                 if (sta->tdls && ret == 0) {
2487                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2488                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2489                                                    NL80211_TDLS_SETUP);
2490                 }
2491         } else if (old_state == IEEE80211_STA_NONE &&
2492                    new_state == IEEE80211_STA_AUTH) {
2493                 /*
2494                  * EBS may be disabled due to previous failures reported by FW.
2495                  * Reset EBS status here assuming environment has been changed.
2496                  */
2497                 mvm->last_ebs_successful = true;
2498                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2499                 ret = 0;
2500         } else if (old_state == IEEE80211_STA_AUTH &&
2501                    new_state == IEEE80211_STA_ASSOC) {
2502                 if (vif->type == NL80211_IFTYPE_AP) {
2503                         mvmvif->ap_assoc_sta_count++;
2504                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2505                 }
2506                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2507                 if (ret == 0)
2508                         iwl_mvm_rs_rate_init(mvm, sta,
2509                                              mvmvif->phy_ctxt->channel->band,
2510                                              true);
2511         } else if (old_state == IEEE80211_STA_ASSOC &&
2512                    new_state == IEEE80211_STA_AUTHORIZED) {
2513
2514                 /* we don't support TDLS during DCM */
2515                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2516                         iwl_mvm_teardown_tdls_peers(mvm);
2517
2518                 if (sta->tdls)
2519                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2520                                                    NL80211_TDLS_ENABLE_LINK);
2521
2522                 /* enable beacon filtering */
2523                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2524                 ret = 0;
2525         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2526                    new_state == IEEE80211_STA_ASSOC) {
2527                 /* disable beacon filtering */
2528                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2529                 ret = 0;
2530         } else if (old_state == IEEE80211_STA_ASSOC &&
2531                    new_state == IEEE80211_STA_AUTH) {
2532                 if (vif->type == NL80211_IFTYPE_AP) {
2533                         mvmvif->ap_assoc_sta_count--;
2534                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2535                 }
2536                 ret = 0;
2537         } else if (old_state == IEEE80211_STA_AUTH &&
2538                    new_state == IEEE80211_STA_NONE) {
2539                 ret = 0;
2540         } else if (old_state == IEEE80211_STA_NONE &&
2541                    new_state == IEEE80211_STA_NOTEXIST) {
2542                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2543                 if (sta->tdls) {
2544                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2545                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2546                                                    NL80211_TDLS_DISABLE_LINK);
2547                 }
2548         } else {
2549                 ret = -EIO;
2550         }
2551  out_unlock:
2552         mutex_unlock(&mvm->mutex);
2553
2554         if (sta->tdls && ret == 0) {
2555                 if (old_state == IEEE80211_STA_NOTEXIST &&
2556                     new_state == IEEE80211_STA_NONE)
2557                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2558                 else if (old_state == IEEE80211_STA_NONE &&
2559                          new_state == IEEE80211_STA_NOTEXIST)
2560                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2561         }
2562
2563         return ret;
2564 }
2565
2566 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2567 {
2568         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2569
2570         mvm->rts_threshold = value;
2571
2572         return 0;
2573 }
2574
2575 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2576                                   struct ieee80211_vif *vif,
2577                                   struct ieee80211_sta *sta, u32 changed)
2578 {
2579         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2580
2581         if (vif->type == NL80211_IFTYPE_STATION &&
2582             changed & IEEE80211_RC_NSS_CHANGED)
2583                 iwl_mvm_sf_update(mvm, vif, false);
2584 }
2585
2586 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2587                                struct ieee80211_vif *vif, u16 ac,
2588                                const struct ieee80211_tx_queue_params *params)
2589 {
2590         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2591         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2592
2593         mvmvif->queue_params[ac] = *params;
2594
2595         /*
2596          * No need to update right away, we'll get BSS_CHANGED_QOS
2597          * The exception is P2P_DEVICE interface which needs immediate update.
2598          */
2599         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2600                 int ret;
2601
2602                 mutex_lock(&mvm->mutex);
2603                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2604                 mutex_unlock(&mvm->mutex);
2605                 return ret;
2606         }
2607         return 0;
2608 }
2609
2610 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2611                                       struct ieee80211_vif *vif)
2612 {
2613         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2614         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2615         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2616
2617         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2618                 return;
2619
2620         /*
2621          * iwl_mvm_protect_session() reads directly from the device
2622          * (the system time), so make sure it is available.
2623          */
2624         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2625                 return;
2626
2627         mutex_lock(&mvm->mutex);
2628         /* Try really hard to protect the session and hear a beacon */
2629         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2630         mutex_unlock(&mvm->mutex);
2631
2632         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2633 }
2634
2635 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2636                                         struct ieee80211_vif *vif,
2637                                         struct cfg80211_sched_scan_request *req,
2638                                         struct ieee80211_scan_ies *ies)
2639 {
2640         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2641
2642         int ret;
2643
2644         mutex_lock(&mvm->mutex);
2645
2646         if (!vif->bss_conf.idle) {
2647                 ret = -EBUSY;
2648                 goto out;
2649         }
2650
2651         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2652
2653 out:
2654         mutex_unlock(&mvm->mutex);
2655         return ret;
2656 }
2657
2658 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2659                                        struct ieee80211_vif *vif)
2660 {
2661         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2662         int ret;
2663
2664         mutex_lock(&mvm->mutex);
2665
2666         /* Due to a race condition, it's possible that mac80211 asks
2667          * us to stop a sched_scan when it's already stopped.  This
2668          * can happen, for instance, if we stopped the scan ourselves,
2669          * called ieee80211_sched_scan_stopped() and the userspace called
2670          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2671          * could run.  To handle this, simply return if the scan is
2672          * not running.
2673         */
2674         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2675                 mutex_unlock(&mvm->mutex);
2676                 return 0;
2677         }
2678
2679         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2680         mutex_unlock(&mvm->mutex);
2681         iwl_mvm_wait_for_async_handlers(mvm);
2682
2683         return ret;
2684 }
2685
2686 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2687                                enum set_key_cmd cmd,
2688                                struct ieee80211_vif *vif,
2689                                struct ieee80211_sta *sta,
2690                                struct ieee80211_key_conf *key)
2691 {
2692         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2693         struct iwl_mvm_sta *mvmsta;
2694         struct iwl_mvm_key_pn *ptk_pn;
2695         int keyidx = key->keyidx;
2696         int ret;
2697         u8 key_offset;
2698
2699         if (iwlwifi_mod_params.sw_crypto) {
2700                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2701                 return -EOPNOTSUPP;
2702         }
2703
2704         switch (key->cipher) {
2705         case WLAN_CIPHER_SUITE_TKIP:
2706                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2707                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2708                 break;
2709         case WLAN_CIPHER_SUITE_CCMP:
2710                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2711                 break;
2712         case WLAN_CIPHER_SUITE_AES_CMAC:
2713                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2714                 break;
2715         case WLAN_CIPHER_SUITE_WEP40:
2716         case WLAN_CIPHER_SUITE_WEP104:
2717                 /* For non-client mode, only use WEP keys for TX as we probably
2718                  * don't have a station yet anyway and would then have to keep
2719                  * track of the keys, linking them to each of the clients/peers
2720                  * as they appear. For now, don't do that, for performance WEP
2721                  * offload doesn't really matter much, but we need it for some
2722                  * other offload features in client mode.
2723                  */
2724                 if (vif->type != NL80211_IFTYPE_STATION)
2725                         return 0;
2726                 break;
2727         default:
2728                 /* currently FW supports only one optional cipher scheme */
2729                 if (hw->n_cipher_schemes &&
2730                     hw->cipher_schemes->cipher == key->cipher)
2731                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2732                 else
2733                         return -EOPNOTSUPP;
2734         }
2735
2736         mutex_lock(&mvm->mutex);
2737
2738         switch (cmd) {
2739         case SET_KEY:
2740                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2741                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2742                         /*
2743                          * GTK on AP interface is a TX-only key, return 0;
2744                          * on IBSS they're per-station and because we're lazy
2745                          * we don't support them for RX, so do the same.
2746                          * CMAC in AP/IBSS modes must be done in software.
2747                          */
2748                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2749                                 ret = -EOPNOTSUPP;
2750                         else
2751                                 ret = 0;
2752                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2753                         break;
2754                 }
2755
2756                 /* During FW restart, in order to restore the state as it was,
2757                  * don't try to reprogram keys we previously failed for.
2758                  */
2759                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2760                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2761                         IWL_DEBUG_MAC80211(mvm,
2762                                            "skip invalid idx key programming during restart\n");
2763                         ret = 0;
2764                         break;
2765                 }
2766
2767                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2768                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2769                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2770                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2771                      key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2772                         struct ieee80211_key_seq seq;
2773                         int tid, q;
2774
2775                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2776                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2777                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2778                                          mvm->trans->num_rx_queues *
2779                                                 sizeof(ptk_pn->q[0]),
2780                                          GFP_KERNEL);
2781                         if (!ptk_pn) {
2782                                 ret = -ENOMEM;
2783                                 break;
2784                         }
2785
2786                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2787                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2788                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2789                                         memcpy(ptk_pn->q[q].pn[tid],
2790                                                seq.ccmp.pn,
2791                                                IEEE80211_CCMP_PN_LEN);
2792                         }
2793
2794                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2795                 }
2796
2797                 /* in HW restart reuse the index, otherwise request a new one */
2798                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2799                         key_offset = key->hw_key_idx;
2800                 else
2801                         key_offset = STA_KEY_IDX_INVALID;
2802
2803                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2804                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2805                 if (ret) {
2806                         IWL_WARN(mvm, "set key failed\n");
2807                         /*
2808                          * can't add key for RX, but we don't need it
2809                          * in the device for TX so still return 0
2810                          */
2811                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2812                         ret = 0;
2813                 }
2814
2815                 break;
2816         case DISABLE_KEY:
2817                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2818                         ret = 0;
2819                         break;
2820                 }
2821
2822                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2823                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2824                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2825                      key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2826                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2827                         ptk_pn = rcu_dereference_protected(
2828                                                 mvmsta->ptk_pn[keyidx],
2829                                                 lockdep_is_held(&mvm->mutex));
2830                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2831                         if (ptk_pn)
2832                                 kfree_rcu(ptk_pn, rcu_head);
2833                 }
2834
2835                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2836                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2837                 break;
2838         default:
2839                 ret = -EINVAL;
2840         }
2841
2842         mutex_unlock(&mvm->mutex);
2843         return ret;
2844 }
2845
2846 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2847                                         struct ieee80211_vif *vif,
2848                                         struct ieee80211_key_conf *keyconf,
2849                                         struct ieee80211_sta *sta,
2850                                         u32 iv32, u16 *phase1key)
2851 {
2852         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2853
2854         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2855                 return;
2856
2857         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2858 }
2859
2860
2861 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2862                                struct iwl_rx_packet *pkt, void *data)
2863 {
2864         struct iwl_mvm *mvm =
2865                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2866         struct iwl_hs20_roc_res *resp;
2867         int resp_len = iwl_rx_packet_payload_len(pkt);
2868         struct iwl_mvm_time_event_data *te_data = data;
2869
2870         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2871                 return true;
2872
2873         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2874                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2875                 return true;
2876         }
2877
2878         resp = (void *)pkt->data;
2879
2880         IWL_DEBUG_TE(mvm,
2881                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2882                      resp->status, resp->event_unique_id);
2883
2884         te_data->uid = le32_to_cpu(resp->event_unique_id);
2885         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2886                      te_data->uid);
2887
2888         spin_lock_bh(&mvm->time_event_lock);
2889         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2890         spin_unlock_bh(&mvm->time_event_lock);
2891
2892         return true;
2893 }
2894
2895 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2896 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2897 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2898 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2899 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2900 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2901                                     struct ieee80211_channel *channel,
2902                                     struct ieee80211_vif *vif,
2903                                     int duration)
2904 {
2905         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2906         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2907         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2908         static const u16 time_event_response[] = { HOT_SPOT_CMD };
2909         struct iwl_notification_wait wait_time_event;
2910         u32 dtim_interval = vif->bss_conf.dtim_period *
2911                 vif->bss_conf.beacon_int;
2912         u32 req_dur, delay;
2913         struct iwl_hs20_roc_req aux_roc_req = {
2914                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2915                 .id_and_color =
2916                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2917                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2918                 /* Set the channel info data */
2919                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
2920                         PHY_BAND_24 : PHY_BAND_5,
2921                 .channel_info.channel = channel->hw_value,
2922                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2923                 /* Set the time and duration */
2924                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2925          };
2926
2927         delay = AUX_ROC_MIN_DELAY;
2928         req_dur = MSEC_TO_TU(duration);
2929
2930         /*
2931          * If we are associated we want the delay time to be at least one
2932          * dtim interval so that the FW can wait until after the DTIM and
2933          * then start the time event, this will potentially allow us to
2934          * remain off-channel for the max duration.
2935          * Since we want to use almost a whole dtim interval we would also
2936          * like the delay to be for 2-3 dtim intervals, in case there are
2937          * other time events with higher priority.
2938          */
2939         if (vif->bss_conf.assoc) {
2940                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
2941                 /* We cannot remain off-channel longer than the DTIM interval */
2942                 if (dtim_interval <= req_dur) {
2943                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
2944                         if (req_dur <= AUX_ROC_MIN_DURATION)
2945                                 req_dur = dtim_interval -
2946                                         AUX_ROC_MIN_SAFETY_BUFFER;
2947                 }
2948         }
2949
2950         aux_roc_req.duration = cpu_to_le32(req_dur);
2951         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
2952
2953         IWL_DEBUG_TE(mvm,
2954                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
2955                      channel->hw_value, req_dur, duration, delay,
2956                      dtim_interval);
2957         /* Set the node address */
2958         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2959
2960         lockdep_assert_held(&mvm->mutex);
2961
2962         spin_lock_bh(&mvm->time_event_lock);
2963
2964         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2965                 spin_unlock_bh(&mvm->time_event_lock);
2966                 return -EIO;
2967         }
2968
2969         te_data->vif = vif;
2970         te_data->duration = duration;
2971         te_data->id = HOT_SPOT_CMD;
2972
2973         spin_unlock_bh(&mvm->time_event_lock);
2974
2975         /*
2976          * Use a notification wait, which really just processes the
2977          * command response and doesn't wait for anything, in order
2978          * to be able to process the response and get the UID inside
2979          * the RX path. Using CMD_WANT_SKB doesn't work because it
2980          * stores the buffer and then wakes up this thread, by which
2981          * time another notification (that the time event started)
2982          * might already be processed unsuccessfully.
2983          */
2984         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2985                                    time_event_response,
2986                                    ARRAY_SIZE(time_event_response),
2987                                    iwl_mvm_rx_aux_roc, te_data);
2988
2989         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2990                                    &aux_roc_req);
2991
2992         if (res) {
2993                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2994                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2995                 goto out_clear_te;
2996         }
2997
2998         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2999         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3000         /* should never fail */
3001         WARN_ON_ONCE(res);
3002
3003         if (res) {
3004  out_clear_te:
3005                 spin_lock_bh(&mvm->time_event_lock);
3006                 iwl_mvm_te_clear_data(mvm, te_data);
3007                 spin_unlock_bh(&mvm->time_event_lock);
3008         }
3009
3010         return res;
3011 }
3012
3013 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3014                        struct ieee80211_vif *vif,
3015                        struct ieee80211_channel *channel,
3016                        int duration,
3017                        enum ieee80211_roc_type type)
3018 {
3019         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3020         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3021         struct cfg80211_chan_def chandef;
3022         struct iwl_mvm_phy_ctxt *phy_ctxt;
3023         int ret, i;
3024
3025         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3026                            duration, type);
3027
3028         flush_work(&mvm->roc_done_wk);
3029
3030         mutex_lock(&mvm->mutex);
3031
3032         switch (vif->type) {
3033         case NL80211_IFTYPE_STATION:
3034                 if (fw_has_capa(&mvm->fw->ucode_capa,
3035                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3036                         /* Use aux roc framework (HS20) */
3037                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3038                                                        vif, duration);
3039                         goto out_unlock;
3040                 }
3041                 IWL_ERR(mvm, "hotspot not supported\n");
3042                 ret = -EINVAL;
3043                 goto out_unlock;
3044         case NL80211_IFTYPE_P2P_DEVICE:
3045                 /* handle below */
3046                 break;
3047         default:
3048                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3049                 ret = -EINVAL;
3050                 goto out_unlock;
3051         }
3052
3053         for (i = 0; i < NUM_PHY_CTX; i++) {
3054                 phy_ctxt = &mvm->phy_ctxts[i];
3055                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3056                         continue;
3057
3058                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3059                         /*
3060                          * Unbind the P2P_DEVICE from the current PHY context,
3061                          * and if the PHY context is not used remove it.
3062                          */
3063                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3064                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3065                                 goto out_unlock;
3066
3067                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3068
3069                         /* Bind the P2P_DEVICE to the current PHY Context */
3070                         mvmvif->phy_ctxt = phy_ctxt;
3071
3072                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3073                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3074                                 goto out_unlock;
3075
3076                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3077                         goto schedule_time_event;
3078                 }
3079         }
3080
3081         /* Need to update the PHY context only if the ROC channel changed */
3082         if (channel == mvmvif->phy_ctxt->channel)
3083                 goto schedule_time_event;
3084
3085         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3086
3087         /*
3088          * Change the PHY context configuration as it is currently referenced
3089          * only by the P2P Device MAC
3090          */
3091         if (mvmvif->phy_ctxt->ref == 1) {
3092                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3093                                                &chandef, 1, 1);
3094                 if (ret)
3095                         goto out_unlock;
3096         } else {
3097                 /*
3098                  * The PHY context is shared with other MACs. Need to remove the
3099                  * P2P Device from the binding, allocate an new PHY context and
3100                  * create a new binding
3101                  */
3102                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3103                 if (!phy_ctxt) {
3104                         ret = -ENOSPC;
3105                         goto out_unlock;
3106                 }
3107
3108                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3109                                                1, 1);
3110                 if (ret) {
3111                         IWL_ERR(mvm, "Failed to change PHY context\n");
3112                         goto out_unlock;
3113                 }
3114
3115                 /* Unbind the P2P_DEVICE from the current PHY context */
3116                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3117                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3118                         goto out_unlock;
3119
3120                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3121
3122                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3123                 mvmvif->phy_ctxt = phy_ctxt;
3124
3125                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3126                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3127                         goto out_unlock;
3128
3129                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3130         }
3131
3132 schedule_time_event:
3133         /* Schedule the time events */
3134         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3135
3136 out_unlock:
3137         mutex_unlock(&mvm->mutex);
3138         IWL_DEBUG_MAC80211(mvm, "leave\n");
3139         return ret;
3140 }
3141
3142 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3143 {
3144         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3145
3146         IWL_DEBUG_MAC80211(mvm, "enter\n");
3147
3148         mutex_lock(&mvm->mutex);
3149         iwl_mvm_stop_roc(mvm);
3150         mutex_unlock(&mvm->mutex);
3151
3152         IWL_DEBUG_MAC80211(mvm, "leave\n");
3153         return 0;
3154 }
3155
3156 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3157                                  struct ieee80211_chanctx_conf *ctx)
3158 {
3159         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3160         struct iwl_mvm_phy_ctxt *phy_ctxt;
3161         int ret;
3162
3163         lockdep_assert_held(&mvm->mutex);
3164
3165         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3166
3167         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3168         if (!phy_ctxt) {
3169                 ret = -ENOSPC;
3170                 goto out;
3171         }
3172
3173         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3174                                        ctx->rx_chains_static,
3175                                        ctx->rx_chains_dynamic);
3176         if (ret) {
3177                 IWL_ERR(mvm, "Failed to add PHY context\n");
3178                 goto out;
3179         }
3180
3181         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3182         *phy_ctxt_id = phy_ctxt->id;
3183 out:
3184         return ret;
3185 }
3186
3187 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3188                                struct ieee80211_chanctx_conf *ctx)
3189 {
3190         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3191         int ret;
3192
3193         mutex_lock(&mvm->mutex);
3194         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3195         mutex_unlock(&mvm->mutex);
3196
3197         return ret;
3198 }
3199
3200 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3201                                      struct ieee80211_chanctx_conf *ctx)
3202 {
3203         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3204         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3205
3206         lockdep_assert_held(&mvm->mutex);
3207
3208         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3209 }
3210
3211 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3212                                    struct ieee80211_chanctx_conf *ctx)
3213 {
3214         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3215
3216         mutex_lock(&mvm->mutex);
3217         __iwl_mvm_remove_chanctx(mvm, ctx);
3218         mutex_unlock(&mvm->mutex);
3219 }
3220
3221 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3222                                    struct ieee80211_chanctx_conf *ctx,
3223                                    u32 changed)
3224 {
3225         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3226         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3227         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3228
3229         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3230                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3231                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3232                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3233                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3234                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3235                       phy_ctxt->ref, changed))
3236                 return;
3237
3238         mutex_lock(&mvm->mutex);
3239         iwl_mvm_bt_coex_vif_change(mvm);
3240         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3241                                  ctx->rx_chains_static,
3242                                  ctx->rx_chains_dynamic);
3243         mutex_unlock(&mvm->mutex);
3244 }
3245
3246 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3247                                         struct ieee80211_vif *vif,
3248                                         struct ieee80211_chanctx_conf *ctx,
3249                                         bool switching_chanctx)
3250 {
3251         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3252         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3253         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3254         int ret;
3255
3256         lockdep_assert_held(&mvm->mutex);
3257
3258         mvmvif->phy_ctxt = phy_ctxt;
3259
3260         switch (vif->type) {
3261         case NL80211_IFTYPE_AP:
3262                 /* only needed if we're switching chanctx (i.e. during CSA) */
3263                 if (switching_chanctx) {
3264                         mvmvif->ap_ibss_active = true;
3265                         break;
3266                 }
3267         case NL80211_IFTYPE_ADHOC:
3268                 /*
3269                  * The AP binding flow is handled as part of the start_ap flow
3270                  * (in bss_info_changed), similarly for IBSS.
3271                  */
3272                 ret = 0;
3273                 goto out;
3274         case NL80211_IFTYPE_STATION:
3275                 break;
3276         case NL80211_IFTYPE_MONITOR:
3277                 /* always disable PS when a monitor interface is active */
3278                 mvmvif->ps_disabled = true;
3279                 break;
3280         default:
3281                 ret = -EINVAL;
3282                 goto out;
3283         }
3284
3285         ret = iwl_mvm_binding_add_vif(mvm, vif);
3286         if (ret)
3287                 goto out;
3288
3289         /*
3290          * Power state must be updated before quotas,
3291          * otherwise fw will complain.
3292          */
3293         iwl_mvm_power_update_mac(mvm);
3294
3295         /* Setting the quota at this stage is only required for monitor
3296          * interfaces. For the other types, the bss_info changed flow
3297          * will handle quota settings.
3298          */
3299         if (vif->type == NL80211_IFTYPE_MONITOR) {
3300                 mvmvif->monitor_active = true;
3301                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3302                 if (ret)
3303                         goto out_remove_binding;
3304
3305                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3306                 if (ret)
3307                         goto out_remove_binding;
3308
3309         }
3310
3311         /* Handle binding during CSA */
3312         if (vif->type == NL80211_IFTYPE_AP) {
3313                 iwl_mvm_update_quotas(mvm, false, NULL);
3314                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3315         }
3316
3317         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3318                 u32 duration = 2 * vif->bss_conf.beacon_int;
3319
3320                 /* iwl_mvm_protect_session() reads directly from the
3321                  * device (the system time), so make sure it is
3322                  * available.
3323                  */
3324                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3325                 if (ret)
3326                         goto out_remove_binding;
3327
3328                 /* Protect the session to make sure we hear the first
3329                  * beacon on the new channel.
3330                  */
3331                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3332                                         vif->bss_conf.beacon_int / 2,
3333                                         true);
3334
3335                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3336
3337                 iwl_mvm_update_quotas(mvm, false, NULL);
3338         }
3339
3340         goto out;
3341
3342 out_remove_binding:
3343         iwl_mvm_binding_remove_vif(mvm, vif);
3344         iwl_mvm_power_update_mac(mvm);
3345 out:
3346         if (ret)
3347                 mvmvif->phy_ctxt = NULL;
3348         return ret;
3349 }
3350 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3351                                       struct ieee80211_vif *vif,
3352                                       struct ieee80211_chanctx_conf *ctx)
3353 {
3354         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3355         int ret;
3356
3357         mutex_lock(&mvm->mutex);
3358         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3359         mutex_unlock(&mvm->mutex);
3360
3361         return ret;
3362 }
3363
3364 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3365                                            struct ieee80211_vif *vif,
3366                                            struct ieee80211_chanctx_conf *ctx,
3367                                            bool switching_chanctx)
3368 {
3369         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3370         struct ieee80211_vif *disabled_vif = NULL;
3371
3372         lockdep_assert_held(&mvm->mutex);
3373
3374         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3375
3376         switch (vif->type) {
3377         case NL80211_IFTYPE_ADHOC:
3378                 goto out;
3379         case NL80211_IFTYPE_MONITOR:
3380                 mvmvif->monitor_active = false;
3381                 mvmvif->ps_disabled = false;
3382                 iwl_mvm_rm_snif_sta(mvm, vif);
3383                 break;
3384         case NL80211_IFTYPE_AP:
3385                 /* This part is triggered only during CSA */
3386                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3387                         goto out;
3388
3389                 mvmvif->csa_countdown = false;
3390
3391                 /* Set CS bit on all the stations */
3392                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3393
3394                 /* Save blocked iface, the timeout is set on the next beacon */
3395                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3396
3397                 mvmvif->ap_ibss_active = false;
3398                 break;
3399         case NL80211_IFTYPE_STATION:
3400                 if (!switching_chanctx)
3401                         break;
3402
3403                 disabled_vif = vif;
3404
3405                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3406                 break;
3407         default:
3408                 break;
3409         }
3410
3411         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3412         iwl_mvm_binding_remove_vif(mvm, vif);
3413
3414 out:
3415         mvmvif->phy_ctxt = NULL;
3416         iwl_mvm_power_update_mac(mvm);
3417 }
3418
3419 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3420                                          struct ieee80211_vif *vif,
3421                                          struct ieee80211_chanctx_conf *ctx)
3422 {
3423         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3424
3425         mutex_lock(&mvm->mutex);
3426         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3427         mutex_unlock(&mvm->mutex);
3428 }
3429
3430 static int
3431 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3432                                 struct ieee80211_vif_chanctx_switch *vifs)
3433 {
3434         int ret;
3435
3436         mutex_lock(&mvm->mutex);
3437         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3438         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3439
3440         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3441         if (ret) {
3442                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3443                 goto out_reassign;
3444         }
3445
3446         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3447                                            true);
3448         if (ret) {
3449                 IWL_ERR(mvm,
3450                         "failed to assign new_ctx during channel switch\n");
3451                 goto out_remove;
3452         }
3453
3454         /* we don't support TDLS during DCM - can be caused by channel switch */
3455         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3456                 iwl_mvm_teardown_tdls_peers(mvm);
3457
3458         goto out;
3459
3460 out_remove:
3461         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3462
3463 out_reassign:
3464         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3465                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3466                 goto out_restart;
3467         }
3468
3469         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3470                                          true)) {
3471                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3472                 goto out_restart;
3473         }
3474
3475         goto out;
3476
3477 out_restart:
3478         /* things keep failing, better restart the hw */
3479         iwl_mvm_nic_restart(mvm, false);
3480
3481 out:
3482         mutex_unlock(&mvm->mutex);
3483
3484         return ret;
3485 }
3486
3487 static int
3488 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3489                                     struct ieee80211_vif_chanctx_switch *vifs)
3490 {
3491         int ret;
3492
3493         mutex_lock(&mvm->mutex);
3494         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3495
3496         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3497                                            true);
3498         if (ret) {
3499                 IWL_ERR(mvm,
3500                         "failed to assign new_ctx during channel switch\n");
3501                 goto out_reassign;
3502         }
3503
3504         goto out;
3505
3506 out_reassign:
3507         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3508                                          true)) {
3509                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3510                 goto out_restart;
3511         }
3512
3513         goto out;
3514
3515 out_restart:
3516         /* things keep failing, better restart the hw */
3517         iwl_mvm_nic_restart(mvm, false);
3518
3519 out:
3520         mutex_unlock(&mvm->mutex);
3521
3522         return ret;
3523 }
3524
3525 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3526                                       struct ieee80211_vif_chanctx_switch *vifs,
3527                                       int n_vifs,
3528                                       enum ieee80211_chanctx_switch_mode mode)
3529 {
3530         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3531         int ret;
3532
3533         /* we only support a single-vif right now */
3534         if (n_vifs > 1)
3535                 return -EOPNOTSUPP;
3536
3537         switch (mode) {
3538         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3539                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3540                 break;
3541         case CHANCTX_SWMODE_REASSIGN_VIF:
3542                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3543                 break;
3544         default:
3545                 ret = -EOPNOTSUPP;
3546                 break;
3547         }
3548
3549         return ret;
3550 }
3551
3552 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3553                            struct ieee80211_sta *sta,
3554                            bool set)
3555 {
3556         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3557         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3558
3559         if (!mvm_sta || !mvm_sta->vif) {
3560                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3561                 return -EINVAL;
3562         }
3563
3564         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3565 }
3566
3567 #ifdef CONFIG_NL80211_TESTMODE
3568 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3569         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3570         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3571         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3572 };
3573
3574 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3575                                       struct ieee80211_vif *vif,
3576                                       void *data, int len)
3577 {
3578         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3579         int err;
3580         u32 noa_duration;
3581
3582         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3583         if (err)
3584                 return err;
3585
3586         if (!tb[IWL_MVM_TM_ATTR_CMD])
3587                 return -EINVAL;
3588
3589         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3590         case IWL_MVM_TM_CMD_SET_NOA:
3591                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3592                     !vif->bss_conf.enable_beacon ||
3593                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3594                         return -EINVAL;
3595
3596                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3597                 if (noa_duration >= vif->bss_conf.beacon_int)
3598                         return -EINVAL;
3599
3600                 mvm->noa_duration = noa_duration;
3601                 mvm->noa_vif = vif;
3602
3603                 return iwl_mvm_update_quotas(mvm, false, NULL);
3604         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3605                 /* must be associated client vif - ignore authorized */
3606                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3607                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3608                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3609                         return -EINVAL;
3610
3611                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3612                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3613                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3614         }
3615
3616         return -EOPNOTSUPP;
3617 }
3618
3619 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3620                                     struct ieee80211_vif *vif,
3621                                     void *data, int len)
3622 {
3623         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3624         int err;
3625
3626         mutex_lock(&mvm->mutex);
3627         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3628         mutex_unlock(&mvm->mutex);
3629
3630         return err;
3631 }
3632 #endif
3633
3634 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3635                                    struct ieee80211_vif *vif,
3636                                    struct ieee80211_channel_switch *chsw)
3637 {
3638         /* By implementing this operation, we prevent mac80211 from
3639          * starting its own channel switch timer, so that we can call
3640          * ieee80211_chswitch_done() ourselves at the right time
3641          * (which is when the absence time event starts).
3642          */
3643
3644         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3645                            "dummy channel switch op\n");
3646 }
3647
3648 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3649                                       struct ieee80211_vif *vif,
3650                                       struct ieee80211_channel_switch *chsw)
3651 {
3652         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3653         struct ieee80211_vif *csa_vif;
3654         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3655         u32 apply_time;
3656         int ret;
3657
3658         mutex_lock(&mvm->mutex);
3659
3660         mvmvif->csa_failed = false;
3661
3662         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3663                            chsw->chandef.center_freq1);
3664
3665         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3666
3667         switch (vif->type) {
3668         case NL80211_IFTYPE_AP:
3669                 csa_vif =
3670                         rcu_dereference_protected(mvm->csa_vif,
3671                                                   lockdep_is_held(&mvm->mutex));
3672                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3673                               "Another CSA is already in progress")) {
3674                         ret = -EBUSY;
3675                         goto out_unlock;
3676                 }
3677
3678                 rcu_assign_pointer(mvm->csa_vif, vif);
3679
3680                 if (WARN_ONCE(mvmvif->csa_countdown,
3681                               "Previous CSA countdown didn't complete")) {
3682                         ret = -EBUSY;
3683                         goto out_unlock;
3684                 }
3685
3686                 break;
3687         case NL80211_IFTYPE_STATION:
3688                 if (mvmvif->lqm_active)
3689                         iwl_mvm_send_lqm_cmd(vif,
3690                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3691                                              0, 0);
3692
3693                 /* Schedule the time event to a bit before beacon 1,
3694                  * to make sure we're in the new channel when the
3695                  * GO/AP arrives.
3696                  */
3697                 apply_time = chsw->device_timestamp +
3698                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3699                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3700
3701                 if (chsw->block_tx)
3702                         iwl_mvm_csa_client_absent(mvm, vif);
3703
3704                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3705                                             apply_time);
3706                 if (mvmvif->bf_data.bf_enabled) {
3707                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3708                         if (ret)
3709                                 goto out_unlock;
3710                 }
3711
3712                 break;
3713         default:
3714                 break;
3715         }
3716
3717         mvmvif->ps_disabled = true;
3718
3719         ret = iwl_mvm_power_update_ps(mvm);
3720         if (ret)
3721                 goto out_unlock;
3722
3723         /* we won't be on this channel any longer */
3724         iwl_mvm_teardown_tdls_peers(mvm);
3725
3726 out_unlock:
3727         mutex_unlock(&mvm->mutex);
3728
3729         return ret;
3730 }
3731
3732 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3733                                        struct ieee80211_vif *vif)
3734 {
3735         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3736         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3737         int ret;
3738
3739         mutex_lock(&mvm->mutex);
3740
3741         if (mvmvif->csa_failed) {
3742                 mvmvif->csa_failed = false;
3743                 ret = -EIO;
3744                 goto out_unlock;
3745         }
3746
3747         if (vif->type == NL80211_IFTYPE_STATION) {
3748                 struct iwl_mvm_sta *mvmsta;
3749
3750                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3751                                                           mvmvif->ap_sta_id);
3752
3753                 if (WARN_ON(!mvmsta)) {
3754                         ret = -EIO;
3755                         goto out_unlock;
3756                 }
3757
3758                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3759
3760                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3761
3762                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3763                 if (ret)
3764                         goto out_unlock;
3765
3766                 iwl_mvm_stop_session_protection(mvm, vif);
3767         }
3768
3769         mvmvif->ps_disabled = false;
3770
3771         ret = iwl_mvm_power_update_ps(mvm);
3772
3773 out_unlock:
3774         mutex_unlock(&mvm->mutex);
3775
3776         return ret;
3777 }
3778
3779 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3780                               struct ieee80211_vif *vif, u32 queues, bool drop)
3781 {
3782         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3783         struct iwl_mvm_vif *mvmvif;
3784         struct iwl_mvm_sta *mvmsta;
3785         struct ieee80211_sta *sta;
3786         int i;
3787         u32 msk = 0;
3788
3789         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3790                 return;
3791
3792         /* Make sure we're done with the deferred traffic before flushing */
3793         if (iwl_mvm_is_dqa_supported(mvm))
3794                 flush_work(&mvm->add_stream_wk);
3795
3796         mutex_lock(&mvm->mutex);
3797         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3798
3799         /* flush the AP-station and all TDLS peers */
3800         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3801                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3802                                                 lockdep_is_held(&mvm->mutex));
3803                 if (IS_ERR_OR_NULL(sta))
3804                         continue;
3805
3806                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3807                 if (mvmsta->vif != vif)
3808                         continue;
3809
3810                 /* make sure only TDLS peers or the AP are flushed */
3811                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3812
3813                 msk |= mvmsta->tfd_queue_msk;
3814         }
3815
3816         if (drop) {
3817                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3818                         IWL_ERR(mvm, "flush request fail\n");
3819                 mutex_unlock(&mvm->mutex);
3820         } else {
3821                 mutex_unlock(&mvm->mutex);
3822
3823                 /* this can take a while, and we may need/want other operations
3824                  * to succeed while doing this, so do it without the mutex held
3825                  */
3826                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3827         }
3828 }
3829
3830 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3831                                   struct survey_info *survey)
3832 {
3833         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3834         int ret;
3835
3836         memset(survey, 0, sizeof(*survey));
3837
3838         /* only support global statistics right now */
3839         if (idx != 0)
3840                 return -ENOENT;
3841
3842         if (fw_has_capa(&mvm->fw->ucode_capa,
3843                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3844                 return -ENOENT;
3845
3846         mutex_lock(&mvm->mutex);
3847
3848         if (mvm->ucode_loaded) {
3849                 ret = iwl_mvm_request_statistics(mvm, false);
3850                 if (ret)
3851                         goto out;
3852         }
3853
3854         survey->filled = SURVEY_INFO_TIME |
3855                          SURVEY_INFO_TIME_RX |
3856                          SURVEY_INFO_TIME_TX |
3857                          SURVEY_INFO_TIME_SCAN;
3858         survey->time = mvm->accu_radio_stats.on_time_rf +
3859                        mvm->radio_stats.on_time_rf;
3860         do_div(survey->time, USEC_PER_MSEC);
3861
3862         survey->time_rx = mvm->accu_radio_stats.rx_time +
3863                           mvm->radio_stats.rx_time;
3864         do_div(survey->time_rx, USEC_PER_MSEC);
3865
3866         survey->time_tx = mvm->accu_radio_stats.tx_time +
3867                           mvm->radio_stats.tx_time;
3868         do_div(survey->time_tx, USEC_PER_MSEC);
3869
3870         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3871                             mvm->radio_stats.on_time_scan;
3872         do_div(survey->time_scan, USEC_PER_MSEC);
3873
3874         ret = 0;
3875  out:
3876         mutex_unlock(&mvm->mutex);
3877         return ret;
3878 }
3879
3880 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3881                                        struct ieee80211_vif *vif,
3882                                        struct ieee80211_sta *sta,
3883                                        struct station_info *sinfo)
3884 {
3885         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3886         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3887         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3888
3889         if (fw_has_capa(&mvm->fw->ucode_capa,
3890                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3891                 return;
3892
3893         /* if beacon filtering isn't on mac80211 does it anyway */
3894         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3895                 return;
3896
3897         if (!vif->bss_conf.assoc)
3898                 return;
3899
3900         mutex_lock(&mvm->mutex);
3901
3902         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3903                 goto unlock;
3904
3905         if (iwl_mvm_request_statistics(mvm, false))
3906                 goto unlock;
3907
3908         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3909                            mvmvif->beacon_stats.accu_num_beacons;
3910         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3911         if (mvmvif->beacon_stats.avg_signal) {
3912                 /* firmware only reports a value after RXing a few beacons */
3913                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3914                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3915         }
3916  unlock:
3917         mutex_unlock(&mvm->mutex);
3918 }
3919
3920 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
3921                                         struct ieee80211_vif *vif,
3922                                         const struct ieee80211_event *event)
3923 {
3924 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3925         do {                                                    \
3926                 if ((_cnt) && --(_cnt))                         \
3927                         break;                                  \
3928                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3929         } while (0)
3930
3931         struct iwl_fw_dbg_trigger_tlv *trig;
3932         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3933
3934         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3935                 return;
3936
3937         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3938         trig_mlme = (void *)trig->data;
3939         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3940                 return;
3941
3942         if (event->u.mlme.data == ASSOC_EVENT) {
3943                 if (event->u.mlme.status == MLME_DENIED)
3944                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3945                                            trig_mlme->stop_assoc_denied,
3946                                            "DENIED ASSOC: reason %d",
3947                                             event->u.mlme.reason);
3948                 else if (event->u.mlme.status == MLME_TIMEOUT)
3949                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3950                                            trig_mlme->stop_assoc_timeout,
3951                                            "ASSOC TIMEOUT");
3952         } else if (event->u.mlme.data == AUTH_EVENT) {
3953                 if (event->u.mlme.status == MLME_DENIED)
3954                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3955                                            trig_mlme->stop_auth_denied,
3956                                            "DENIED AUTH: reason %d",
3957                                            event->u.mlme.reason);
3958                 else if (event->u.mlme.status == MLME_TIMEOUT)
3959                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3960                                            trig_mlme->stop_auth_timeout,
3961                                            "AUTH TIMEOUT");
3962         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
3963                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3964                                    trig_mlme->stop_rx_deauth,
3965                                    "DEAUTH RX %d", event->u.mlme.reason);
3966         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
3967                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3968                                    trig_mlme->stop_tx_deauth,
3969                                    "DEAUTH TX %d", event->u.mlme.reason);
3970         }
3971 #undef CHECK_MLME_TRIGGER
3972 }
3973
3974 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
3975                                           struct ieee80211_vif *vif,
3976                                           const struct ieee80211_event *event)
3977 {
3978         struct iwl_fw_dbg_trigger_tlv *trig;
3979         struct iwl_fw_dbg_trigger_ba *ba_trig;
3980
3981         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
3982                 return;
3983
3984         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
3985         ba_trig = (void *)trig->data;
3986         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3987                 return;
3988
3989         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
3990                 return;
3991
3992         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
3993                                     "BAR received from %pM, tid %d, ssn %d",
3994                                     event->u.ba.sta->addr, event->u.ba.tid,
3995                                     event->u.ba.ssn);
3996 }
3997
3998 static void
3999 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4000                                      struct ieee80211_vif *vif,
4001                                      const struct ieee80211_event *event)
4002 {
4003         struct iwl_fw_dbg_trigger_tlv *trig;
4004         struct iwl_fw_dbg_trigger_ba *ba_trig;
4005
4006         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4007                 return;
4008
4009         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4010         ba_trig = (void *)trig->data;
4011         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4012                 return;
4013
4014         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4015                 return;
4016
4017         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4018                                     "Frame from %pM timed out, tid %d",
4019                                     event->u.ba.sta->addr, event->u.ba.tid);
4020 }
4021
4022 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4023                                        struct ieee80211_vif *vif,
4024                                        const struct ieee80211_event *event)
4025 {
4026         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4027
4028         switch (event->type) {
4029         case MLME_EVENT:
4030                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4031                 break;
4032         case BAR_RX_EVENT:
4033                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4034                 break;
4035         case BA_FRAME_TIMEOUT:
4036                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4037                 break;
4038         default:
4039                 break;
4040         }
4041 }
4042
4043 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4044                                      struct iwl_mvm_internal_rxq_notif *notif,
4045                                      u32 size)
4046 {
4047         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(notif_waitq);
4048         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4049         int ret;
4050
4051         lockdep_assert_held(&mvm->mutex);
4052
4053         if (!iwl_mvm_has_new_rx_api(mvm))
4054                 return;
4055
4056         notif->cookie = mvm->queue_sync_cookie;
4057
4058         if (notif->sync)
4059                 atomic_set(&mvm->queue_sync_counter,
4060                            mvm->trans->num_rx_queues);
4061
4062         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4063         if (ret) {
4064                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4065                 goto out;
4066         }
4067
4068         if (notif->sync)
4069                 ret = wait_event_timeout(notif_waitq,
4070                                          atomic_read(&mvm->queue_sync_counter) == 0,
4071                                          HZ);
4072         WARN_ON_ONCE(!ret);
4073
4074 out:
4075         atomic_set(&mvm->queue_sync_counter, 0);
4076         mvm->queue_sync_cookie++;
4077 }
4078
4079 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4080 {
4081         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4082         struct iwl_mvm_internal_rxq_notif data = {
4083                 .type = IWL_MVM_RXQ_EMPTY,
4084                 .sync = 1,
4085         };
4086
4087         mutex_lock(&mvm->mutex);
4088         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4089         mutex_unlock(&mvm->mutex);
4090 }
4091
4092 const struct ieee80211_ops iwl_mvm_hw_ops = {
4093         .tx = iwl_mvm_mac_tx,
4094         .ampdu_action = iwl_mvm_mac_ampdu_action,
4095         .start = iwl_mvm_mac_start,
4096         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4097         .stop = iwl_mvm_mac_stop,
4098         .add_interface = iwl_mvm_mac_add_interface,
4099         .remove_interface = iwl_mvm_mac_remove_interface,
4100         .config = iwl_mvm_mac_config,
4101         .prepare_multicast = iwl_mvm_prepare_multicast,
4102         .configure_filter = iwl_mvm_configure_filter,
4103         .config_iface_filter = iwl_mvm_config_iface_filter,
4104         .bss_info_changed = iwl_mvm_bss_info_changed,
4105         .hw_scan = iwl_mvm_mac_hw_scan,
4106         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4107         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4108         .sta_state = iwl_mvm_mac_sta_state,
4109         .sta_notify = iwl_mvm_mac_sta_notify,
4110         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4111         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4112         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4113         .sta_rc_update = iwl_mvm_sta_rc_update,
4114         .conf_tx = iwl_mvm_mac_conf_tx,
4115         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4116         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4117         .flush = iwl_mvm_mac_flush,
4118         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4119         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4120         .set_key = iwl_mvm_mac_set_key,
4121         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4122         .remain_on_channel = iwl_mvm_roc,
4123         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4124         .add_chanctx = iwl_mvm_add_chanctx,
4125         .remove_chanctx = iwl_mvm_remove_chanctx,
4126         .change_chanctx = iwl_mvm_change_chanctx,
4127         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4128         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4129         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4130
4131         .start_ap = iwl_mvm_start_ap_ibss,
4132         .stop_ap = iwl_mvm_stop_ap_ibss,
4133         .join_ibss = iwl_mvm_start_ap_ibss,
4134         .leave_ibss = iwl_mvm_stop_ap_ibss,
4135
4136         .set_tim = iwl_mvm_set_tim,
4137
4138         .channel_switch = iwl_mvm_channel_switch,
4139         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4140         .post_channel_switch = iwl_mvm_post_channel_switch,
4141
4142         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4143         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4144         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4145
4146         .event_callback = iwl_mvm_mac_event_callback,
4147
4148         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4149
4150         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4151
4152 #ifdef CONFIG_PM_SLEEP
4153         /* look at d3.c */
4154         .suspend = iwl_mvm_suspend,
4155         .resume = iwl_mvm_resume,
4156         .set_wakeup = iwl_mvm_set_wakeup,
4157         .set_rekey_data = iwl_mvm_set_rekey_data,
4158 #if IS_ENABLED(CONFIG_IPV6)
4159         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4160 #endif
4161         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4162 #endif
4163         .get_survey = iwl_mvm_mac_get_survey,
4164         .sta_statistics = iwl_mvm_mac_sta_statistics,
4165 };