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.
  45  *  * Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in
  47  *    the documentation and/or other materials provided with the
  48  *    distribution.
  49  *  * Neither the name Intel Corporation nor the names of its
  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
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  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         if (iwl_mvm_has_new_rx_api(mvm))
 443                 ieee80211_hw_set(hw, SUPPORTS_REORDERING_BUFFER);
 444
 445         if (mvm->trans->num_rx_queues > 1)
 446                 ieee80211_hw_set(hw, USES_RSS);
 447
 448         if (mvm->trans->max_skb_frags)
 449                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 450
 451         hw->queues = mvm->first_agg_queue;
 452         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 453         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 454                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 455         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 456                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 457         hw->rate_control_algorithm = "iwl-mvm-rs";
 458         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 459         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 460
 461         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
 462         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 463         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 464         hw->wiphy->cipher_suites = mvm->ciphers;
 465
 466         /*
 467          * Enable 11w if advertised by firmware and software crypto
 468          * is not enabled (as the firmware will interpret some mgmt
 469          * packets, so enabling it with software crypto isn't safe)
 470          */
 471         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 472             !iwlwifi_mod_params.sw_crypto) {
 473                 ieee80211_hw_set(hw, MFP_CAPABLE);
 474                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 475                         WLAN_CIPHER_SUITE_AES_CMAC;
 476                 hw->wiphy->n_cipher_suites++;
 477         }
 478
 479         /* currently FW API supports only one optional cipher scheme */
 480         if (mvm->fw->cs[0].cipher) {
 481                 mvm->hw->n_cipher_schemes = 1;
 482                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 483                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 484                         mvm->fw->cs[0].cipher;
 485                 hw->wiphy->n_cipher_suites++;
 486         }
 487
 488         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 489         hw->wiphy->features |=
 490                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 491                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 492                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 493
 494         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 495         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 496         hw->chanctx_data_size = sizeof(u16);
 497
 498         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 499                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 500                 BIT(NL80211_IFTYPE_AP) |
 501                 BIT(NL80211_IFTYPE_P2P_GO) |
 502                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 503                 BIT(NL80211_IFTYPE_ADHOC);
 504
 505         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 506         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 507         if (iwl_mvm_is_lar_supported(mvm))
 508                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 509         else
 510                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 511                                                REGULATORY_DISABLE_BEACON_HINTS;
 512
 513         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 514                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 515
 516         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 517
 518         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 519         hw->wiphy->n_iface_combinations =
 520                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 521
 522         hw->wiphy->max_remain_on_channel_duration = 10000;
 523         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 524         /* we can compensate an offset of up to 3 channels = 15 MHz */
 525         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 526
 527         /* Extract MAC address */
 528         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 529         hw->wiphy->addresses = mvm->addresses;
 530         hw->wiphy->n_addresses = 1;
 531
 532         /* Extract additional MAC addresses if available */
 533         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 534                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 535
 536         for (i = 1; i < num_mac; i++) {
 537                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 538                        ETH_ALEN);
 539                 mvm->addresses[i].addr[5]++;
 540                 hw->wiphy->n_addresses++;
 541         }
 542
 543         iwl_mvm_reset_phy_ctxts(mvm);
 544
 545         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 546
 547         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 548
 549         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 550         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 551                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 552
 553         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 554                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 555         else
 556                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 557
 558         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 559                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 560                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 561         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 562                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 563                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 564
 565                 if (fw_has_capa(&mvm->fw->ucode_capa,
 566                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 567                     fw_has_api(&mvm->fw->ucode_capa,
 568                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 569                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 570                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 571         }
 572
 573         hw->wiphy->hw_version = mvm->trans->hw_id;
 574
 575         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 576                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 577         else
 578                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 579
 580         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 581         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 582         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 583         /* we create the 802.11 header and zero length SSID IE. */
 584         hw->wiphy->max_sched_scan_ie_len =
 585                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 586         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 587         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 588
 589         /*
 590          * the firmware uses u8 for num of iterations, but 0xff is saved for
 591          * infinite loop, so the maximum number of iterations is actually 254.
 592          */
 593         hw->wiphy->max_sched_scan_plan_iterations = 254;
 594
 595         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 596                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 597                                NL80211_FEATURE_P2P_GO_OPPPS |
 598                                NL80211_FEATURE_DYNAMIC_SMPS |
 599                                NL80211_FEATURE_STATIC_SMPS |
 600                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 601
 602         if (fw_has_capa(&mvm->fw->ucode_capa,
 603                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 604                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 605         if (fw_has_capa(&mvm->fw->ucode_capa,
 606                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 607                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 608
 609         if (fw_has_capa(&mvm->fw->ucode_capa,
 610                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 611                 hw->wiphy->features |=
 612                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 613
 614         if (fw_has_capa(&mvm->fw->ucode_capa,
 615                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 616                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 617
 618         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 619
 620 #ifdef CONFIG_PM_SLEEP
 621         if (iwl_mvm_is_d0i3_supported(mvm) &&
 622             device_can_wakeup(mvm->trans->dev)) {
 623                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 624                 hw->wiphy->wowlan = &mvm->wowlan;
 625         }
 626
 627         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 628             mvm->trans->ops->d3_suspend &&
 629             mvm->trans->ops->d3_resume &&
 630             device_can_wakeup(mvm->trans->dev)) {
 631                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 632                                      WIPHY_WOWLAN_DISCONNECT |
 633                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 634                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 635                                      WIPHY_WOWLAN_NET_DETECT;
 636                 if (!iwlwifi_mod_params.sw_crypto)
 637                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 638                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 639                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 640
 641                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 642                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 643                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 644                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 645                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 646                 hw->wiphy->wowlan = &mvm->wowlan;
 647         }
 648 #endif
 649
 650 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 651         /* assign default bcast filtering configuration */
 652         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 653 #endif
 654
 655         ret = iwl_mvm_leds_init(mvm);
 656         if (ret)
 657                 return ret;
 658
 659         if (fw_has_capa(&mvm->fw->ucode_capa,
 660                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 661                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 662                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 663                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 664         }
 665
 666         if (fw_has_capa(&mvm->fw->ucode_capa,
 667                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 668                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 669                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 670         }
 671
 672         hw->netdev_features |= mvm->cfg->features;
 673         if (!iwl_mvm_is_csum_supported(mvm)) {
 674                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 675                                          NETIF_F_RXCSUM);
 676                 /* We may support SW TX CSUM */
 677                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 678                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 679         }
 680
 681         ret = ieee80211_register_hw(mvm->hw);
 682         if (ret)
 683                 iwl_mvm_leds_exit(mvm);
 684
 685         return ret;
 686 }
 687
 688 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 689                              struct ieee80211_sta *sta,
 690                              struct sk_buff *skb)
 691 {
 692         struct iwl_mvm_sta *mvmsta;
 693         bool defer = false;
 694
 695         /*
 696          * double check the IN_D0I3 flag both before and after
 697          * taking the spinlock, in order to prevent taking
 698          * the spinlock when not needed.
 699          */
 700         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 701                 return false;
 702
 703         spin_lock(&mvm->d0i3_tx_lock);
 704         /*
 705          * testing the flag again ensures the skb dequeue
 706          * loop (on d0i3 exit) hasn't run yet.
 707          */
 708         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 709                 goto out;
 710
 711         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 712         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 713             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 714                 goto out;
 715
 716         __skb_queue_tail(&mvm->d0i3_tx, skb);
 717         ieee80211_stop_queues(mvm->hw);
 718
 719         /* trigger wakeup */
 720         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 721         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 722
 723         defer = true;
 724 out:
 725         spin_unlock(&mvm->d0i3_tx_lock);
 726         return defer;
 727 }
 728
 729 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 730                            struct ieee80211_tx_control *control,
 731                            struct sk_buff *skb)
 732 {
 733         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 734         struct ieee80211_sta *sta = control->sta;
 735         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 736         struct ieee80211_hdr *hdr = (void *)skb->data;
 737
 738         if (iwl_mvm_is_radio_killed(mvm)) {
 739                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 740                 goto drop;
 741         }
 742
 743         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 744             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 745             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 746                 goto drop;
 747
 748         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 749         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 750                      ieee80211_is_mgmt(hdr->frame_control) &&
 751                      !ieee80211_is_deauth(hdr->frame_control) &&
 752                      !ieee80211_is_disassoc(hdr->frame_control) &&
 753                      !ieee80211_is_action(hdr->frame_control)))
 754                 sta = NULL;
 755
 756         if (sta) {
 757                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 758                         return;
 759                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 760                         goto drop;
 761                 return;
 762         }
 763
 764         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 765                 goto drop;
 766         return;
 767  drop:
 768         ieee80211_free_txskb(hw, skb);
 769 }
 770
 771 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 772 {
 773         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 774                 return false;
 775         return true;
 776 }
 777
 778 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 779 {
 780         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 781                 return false;
 782         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 783                 return true;
 784
 785         /* enabled by default */
 786         return true;
 787 }
 788
 789 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 790         do {                                                    \
 791                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 792                         break;                                  \
 793                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 794         } while (0)
 795
 796 static void
 797 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 798                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 799                             enum ieee80211_ampdu_mlme_action action)
 800 {
 801         struct iwl_fw_dbg_trigger_tlv *trig;
 802         struct iwl_fw_dbg_trigger_ba *ba_trig;
 803
 804         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 805                 return;
 806
 807         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 808         ba_trig = (void *)trig->data;
 809
 810         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 811                 return;
 812
 813         switch (action) {
 814         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 815                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 816                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 817
 818                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 819                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 820                                  sta->addr, tid, tid_data->ssn);
 821                 break;
 822                 }
 823         case IEEE80211_AMPDU_TX_STOP_CONT:
 824                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 825                                  "TX AGG STOP: MAC %pM tid %d\n",
 826                                  sta->addr, tid);
 827                 break;
 828         case IEEE80211_AMPDU_RX_START:
 829                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 830                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 831                                  sta->addr, tid, rx_ba_ssn);
 832                 break;
 833         case IEEE80211_AMPDU_RX_STOP:
 834                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 835                                  "RX AGG STOP: MAC %pM tid %d\n",
 836                                  sta->addr, tid);
 837                 break;
 838         default:
 839                 break;
 840         }
 841 }
 842
 843 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 844                                     struct ieee80211_vif *vif,
 845                                     struct ieee80211_ampdu_params *params)
 846 {
 847         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 848         int ret;
 849         bool tx_agg_ref = false;
 850         struct ieee80211_sta *sta = params->sta;
 851         enum ieee80211_ampdu_mlme_action action = params->action;
 852         u16 tid = params->tid;
 853         u16 *ssn = &params->ssn;
 854         u8 buf_size = params->buf_size;
 855         bool amsdu = params->amsdu;
 856         u16 timeout = params->timeout;
 857
 858         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 859                      sta->addr, tid, action);
 860
 861         if (!(mvm->nvm_data->sku_cap_11n_enable))
 862                 return -EACCES;
 863
 864         /* return from D0i3 before starting a new Tx aggregation */
 865         switch (action) {
 866         case IEEE80211_AMPDU_TX_START:
 867         case IEEE80211_AMPDU_TX_STOP_CONT:
 868         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 869         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 870         case IEEE80211_AMPDU_TX_OPERATIONAL:
 871                 /*
 872                  * for tx start, wait synchronously until D0i3 exit to
 873                  * get the correct sequence number for the tid.
 874                  * additionally, some other ampdu actions use direct
 875                  * target access, which is not handled automatically
 876                  * by the trans layer (unlike commands), so wait for
 877                  * d0i3 exit in these cases as well.
 878                  */
 879                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 880                 if (ret)
 881                         return ret;
 882
 883                 tx_agg_ref = true;
 884                 break;
 885         default:
 886                 break;
 887         }
 888
 889         mutex_lock(&mvm->mutex);
 890
 891         switch (action) {
 892         case IEEE80211_AMPDU_RX_START:
 893                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 894                         ret = -EINVAL;
 895                         break;
 896                 }
 897                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 898                                          timeout);
 899                 break;
 900         case IEEE80211_AMPDU_RX_STOP:
 901                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 902                                          timeout);
 903                 break;
 904         case IEEE80211_AMPDU_TX_START:
 905                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 906                         ret = -EINVAL;
 907                         break;
 908                 }
 909                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 910                 break;
 911         case IEEE80211_AMPDU_TX_STOP_CONT:
 912                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 913                 break;
 914         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 915         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 916                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 917                 break;
 918         case IEEE80211_AMPDU_TX_OPERATIONAL:
 919                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 920                                               buf_size, amsdu);
 921                 break;
 922         default:
 923                 WARN_ON_ONCE(1);
 924                 ret = -EINVAL;
 925                 break;
 926         }
 927
 928         if (!ret) {
 929                 u16 rx_ba_ssn = 0;
 930
 931                 if (action == IEEE80211_AMPDU_RX_START)
 932                         rx_ba_ssn = *ssn;
 933
 934                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 935                                             rx_ba_ssn, action);
 936         }
 937         mutex_unlock(&mvm->mutex);
 938
 939         /*
 940          * If the tid is marked as started, we won't use it for offloaded
 941          * traffic on the next D0i3 entry. It's safe to unref.
 942          */
 943         if (tx_agg_ref)
 944                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 945
 946         return ret;
 947 }
 948
 949 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 950                                      struct ieee80211_vif *vif)
 951 {
 952         struct iwl_mvm *mvm = data;
 953         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 954
 955         mvmvif->uploaded = false;
 956         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 957
 958         spin_lock_bh(&mvm->time_event_lock);
 959         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 960         spin_unlock_bh(&mvm->time_event_lock);
 961
 962         mvmvif->phy_ctxt = NULL;
 963         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 964 }
 965
 966 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 967 {
 968         /* clear the D3 reconfig, we only need it to avoid dumping a
 969          * firmware coredump on reconfiguration, we shouldn't do that
 970          * on D3->D0 transition
 971          */
 972         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
 973                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
 974                 iwl_mvm_fw_error_dump(mvm);
 975         }
 976
 977         /* cleanup all stale references (scan, roc), but keep the
 978          * ucode_down ref until reconfig is complete
 979          */
 980         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 981
 982         iwl_mvm_stop_device(mvm);
 983
 984         mvm->scan_status = 0;
 985         mvm->ps_disabled = false;
 986         mvm->calibrating = false;
 987
 988         /* just in case one was running */
 989         iwl_mvm_cleanup_roc_te(mvm);
 990         ieee80211_remain_on_channel_expired(mvm->hw);
 991
 992         /*
 993          * cleanup all interfaces, even inactive ones, as some might have
 994          * gone down during the HW restart
 995          */
 996         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
 997
 998         mvm->p2p_device_vif = NULL;
 999         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1000
1001         iwl_mvm_reset_phy_ctxts(mvm);
1002         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1003         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1004         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1005         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1006         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1007         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1008         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1009         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1010         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1011         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1012
1013         ieee80211_wake_queues(mvm->hw);
1014
1015         /* clear any stale d0i3 state */
1016         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1017
1018         mvm->vif_count = 0;
1019         mvm->rx_ba_sessions = 0;
1020         mvm->fw_dbg_conf = FW_DBG_INVALID;
1021
1022         /* keep statistics ticking */
1023         iwl_mvm_accu_radio_stats(mvm);
1024 }
1025
1026 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1027 {
1028         int ret;
1029
1030         lockdep_assert_held(&mvm->mutex);
1031
1032         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1033                 /* Clean up some internal and mac80211 state on restart */
1034                 iwl_mvm_restart_cleanup(mvm);
1035         } else {
1036                 /* Hold the reference to prevent runtime suspend while
1037                  * the start procedure runs.  It's a bit confusing
1038                  * that the UCODE_DOWN reference is taken, but it just
1039                  * means "UCODE is not UP yet". ( TODO: rename this
1040                  * reference).
1041                  */
1042                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1043         }
1044         ret = iwl_mvm_up(mvm);
1045
1046         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1047                 /* Something went wrong - we need to finish some cleanup
1048                  * that normally iwl_mvm_mac_restart_complete() below
1049                  * would do.
1050                  */
1051                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1052                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1053         }
1054
1055         return ret;
1056 }
1057
1058 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1059 {
1060         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1061         int ret;
1062
1063         /* Some hw restart cleanups must not hold the mutex */
1064         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1065                 /*
1066                  * Make sure we are out of d0i3. This is needed
1067                  * to make sure the reference accounting is correct
1068                  * (and there is no stale d0i3_exit_work).
1069                  */
1070                 wait_event_timeout(mvm->d0i3_exit_waitq,
1071                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1072                                              &mvm->status),
1073                                    HZ);
1074         }
1075
1076         mutex_lock(&mvm->mutex);
1077         ret = __iwl_mvm_mac_start(mvm);
1078         mutex_unlock(&mvm->mutex);
1079
1080         return ret;
1081 }
1082
1083 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1084 {
1085         int ret;
1086
1087         mutex_lock(&mvm->mutex);
1088
1089         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1090         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1091         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1092         if (ret)
1093                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1094                         ret);
1095
1096         /* allow transport/FW low power modes */
1097         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1098
1099         /*
1100          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1101          * of packets the FW sent out, so we must reconnect.
1102          */
1103         iwl_mvm_teardown_tdls_peers(mvm);
1104
1105         mutex_unlock(&mvm->mutex);
1106 }
1107
1108 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1109 {
1110         if (iwl_mvm_is_d0i3_supported(mvm) &&
1111             iwl_mvm_enter_d0i3_on_suspend(mvm))
1112                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1113                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1114                                                         &mvm->status),
1115                                               HZ),
1116                           "D0i3 exit on resume timed out\n");
1117 }
1118
1119 static void
1120 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1121                               enum ieee80211_reconfig_type reconfig_type)
1122 {
1123         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1124
1125         switch (reconfig_type) {
1126         case IEEE80211_RECONFIG_TYPE_RESTART:
1127                 iwl_mvm_restart_complete(mvm);
1128                 break;
1129         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1130                 iwl_mvm_resume_complete(mvm);
1131                 break;
1132         }
1133 }
1134
1135 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1136 {
1137         lockdep_assert_held(&mvm->mutex);
1138
1139         /* firmware counters are obviously reset now, but we shouldn't
1140          * partially track so also clear the fw_reset_accu counters.
1141          */
1142         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1143
1144         /* async_handlers_wk is now blocked */
1145
1146         /*
1147          * The work item could be running or queued if the
1148          * ROC time event stops just as we get here.
1149          */
1150         flush_work(&mvm->roc_done_wk);
1151
1152         iwl_mvm_stop_device(mvm);
1153
1154         iwl_mvm_async_handlers_purge(mvm);
1155         /* async_handlers_list is empty and will stay empty: HW is stopped */
1156
1157         /* the fw is stopped, the aux sta is dead: clean up driver state */
1158         iwl_mvm_del_aux_sta(mvm);
1159
1160         iwl_free_fw_paging(mvm);
1161
1162         /*
1163          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1164          * won't be called in this case).
1165          * But make sure to cleanup interfaces that have gone down before/during
1166          * HW restart was requested.
1167          */
1168         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1169                 ieee80211_iterate_interfaces(mvm->hw, 0,
1170                                              iwl_mvm_cleanup_iterator, mvm);
1171
1172         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1173          * make sure there's nothing left there and warn if any is found.
1174          */
1175         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1176                 int i;
1177
1178                 for (i = 0; i < mvm->max_scans; i++) {
1179                         if (WARN_ONCE(mvm->scan_uid_status[i],
1180                                       "UMAC scan UID %d status was not cleaned\n",
1181                                       i))
1182                                 mvm->scan_uid_status[i] = 0;
1183                 }
1184         }
1185 }
1186
1187 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1188 {
1189         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1190
1191         flush_work(&mvm->d0i3_exit_work);
1192         flush_work(&mvm->async_handlers_wk);
1193         flush_work(&mvm->add_stream_wk);
1194         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1195         iwl_mvm_free_fw_dump_desc(mvm);
1196
1197         mutex_lock(&mvm->mutex);
1198         __iwl_mvm_mac_stop(mvm);
1199         mutex_unlock(&mvm->mutex);
1200
1201         /*
1202          * The worker might have been waiting for the mutex, let it run and
1203          * discover that its list is now empty.
1204          */
1205         cancel_work_sync(&mvm->async_handlers_wk);
1206 }
1207
1208 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1209 {
1210         u16 i;
1211
1212         lockdep_assert_held(&mvm->mutex);
1213
1214         for (i = 0; i < NUM_PHY_CTX; i++)
1215                 if (!mvm->phy_ctxts[i].ref)
1216                         return &mvm->phy_ctxts[i];
1217
1218         IWL_ERR(mvm, "No available PHY context\n");
1219         return NULL;
1220 }
1221
1222 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1223                                 s16 tx_power)
1224 {
1225         struct iwl_dev_tx_power_cmd cmd = {
1226                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1227                 .v2.mac_context_id =
1228                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1229                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1230         };
1231         int len = sizeof(cmd);
1232
1233         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1234                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1235
1236         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1237                 len = sizeof(cmd.v2);
1238
1239         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1240 }
1241
1242 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1243                                      struct ieee80211_vif *vif)
1244 {
1245         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1246         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1247         int ret;
1248
1249         mvmvif->mvm = mvm;
1250
1251         /*
1252          * make sure D0i3 exit is completed, otherwise a target access
1253          * during tx queue configuration could be done when still in
1254          * D0i3 state.
1255          */
1256         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1257         if (ret)
1258                 return ret;
1259
1260         /*
1261          * Not much to do here. The stack will not allow interface
1262          * types or combinations that we didn't advertise, so we
1263          * don't really have to check the types.
1264          */
1265
1266         mutex_lock(&mvm->mutex);
1267
1268         /* make sure that beacon statistics don't go backwards with FW reset */
1269         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1270                 mvmvif->beacon_stats.accu_num_beacons +=
1271                         mvmvif->beacon_stats.num_beacons;
1272
1273         /* Allocate resources for the MAC context, and add it to the fw  */
1274         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1275         if (ret)
1276                 goto out_unlock;
1277
1278         /* Counting number of interfaces is needed for legacy PM */
1279         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1280                 mvm->vif_count++;
1281
1282         /*
1283          * The AP binding flow can be done only after the beacon
1284          * template is configured (which happens only in the mac80211
1285          * start_ap() flow), and adding the broadcast station can happen
1286          * only after the binding.
1287          * In addition, since modifying the MAC before adding a bcast
1288          * station is not allowed by the FW, delay the adding of MAC context to
1289          * the point where we can also add the bcast station.
1290          * In short: there's not much we can do at this point, other than
1291          * allocating resources :)
1292          */
1293         if (vif->type == NL80211_IFTYPE_AP ||
1294             vif->type == NL80211_IFTYPE_ADHOC) {
1295                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1296                 if (ret) {
1297                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1298                         goto out_release;
1299                 }
1300
1301                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1302                 goto out_unlock;
1303         }
1304
1305         mvmvif->features |= hw->netdev_features;
1306
1307         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1308         if (ret)
1309                 goto out_release;
1310
1311         ret = iwl_mvm_power_update_mac(mvm);
1312         if (ret)
1313                 goto out_remove_mac;
1314
1315         /* beacon filtering */
1316         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1317         if (ret)
1318                 goto out_remove_mac;
1319
1320         if (!mvm->bf_allowed_vif &&
1321             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1322                 mvm->bf_allowed_vif = mvmvif;
1323                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1324                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1325         }
1326
1327         /*
1328          * P2P_DEVICE interface does not have a channel context assigned to it,
1329          * so a dedicated PHY context is allocated to it and the corresponding
1330          * MAC context is bound to it at this stage.
1331          */
1332         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1333
1334                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1335                 if (!mvmvif->phy_ctxt) {
1336                         ret = -ENOSPC;
1337                         goto out_free_bf;
1338                 }
1339
1340                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1341                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1342                 if (ret)
1343                         goto out_unref_phy;
1344
1345                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1346                 if (ret)
1347                         goto out_unbind;
1348
1349                 /* Save a pointer to p2p device vif, so it can later be used to
1350                  * update the p2p device MAC when a GO is started/stopped */
1351                 mvm->p2p_device_vif = vif;
1352         }
1353
1354         iwl_mvm_vif_dbgfs_register(mvm, vif);
1355         goto out_unlock;
1356
1357  out_unbind:
1358         iwl_mvm_binding_remove_vif(mvm, vif);
1359  out_unref_phy:
1360         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1361  out_free_bf:
1362         if (mvm->bf_allowed_vif == mvmvif) {
1363                 mvm->bf_allowed_vif = NULL;
1364                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1365                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1366         }
1367  out_remove_mac:
1368         mvmvif->phy_ctxt = NULL;
1369         iwl_mvm_mac_ctxt_remove(mvm, vif);
1370  out_release:
1371         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1372                 mvm->vif_count--;
1373
1374         iwl_mvm_mac_ctxt_release(mvm, vif);
1375  out_unlock:
1376         mutex_unlock(&mvm->mutex);
1377
1378         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1379
1380         return ret;
1381 }
1382
1383 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1384                                         struct ieee80211_vif *vif)
1385 {
1386         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1387
1388         if (tfd_msk) {
1389                 /*
1390                  * mac80211 first removes all the stations of the vif and
1391                  * then removes the vif. When it removes a station it also
1392                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1393                  * of all the stations of this vif are closed, and the queues
1394                  * of these AMPDU sessions are properly closed.
1395                  * We still need to take care of the shared queues of the vif.
1396                  * Flush them here.
1397                  */
1398                 mutex_lock(&mvm->mutex);
1399                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1400                 mutex_unlock(&mvm->mutex);
1401
1402                 /*
1403                  * There are transports that buffer a few frames in the host.
1404                  * For these, the flush above isn't enough since while we were
1405                  * flushing, the transport might have sent more frames to the
1406                  * device. To solve this, wait here until the transport is
1407                  * empty. Technically, this could have replaced the flush
1408                  * above, but flush is much faster than draining. So flush
1409                  * first, and drain to make sure we have no frames in the
1410                  * transport anymore.
1411                  * If a station still had frames on the shared queues, it is
1412                  * already marked as draining, so to complete the draining, we
1413                  * just need to wait until the transport is empty.
1414                  */
1415                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1416         }
1417
1418         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1419                 /*
1420                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1421                  * We assume here that all the packets sent to the OFFCHANNEL
1422                  * queue are sent in ROC session.
1423                  */
1424                 flush_work(&mvm->roc_done_wk);
1425         } else {
1426                 /*
1427                  * By now, all the AC queues are empty. The AGG queues are
1428                  * empty too. We already got all the Tx responses for all the
1429                  * packets in the queues. The drain work can have been
1430                  * triggered. Flush it.
1431                  */
1432                 flush_work(&mvm->sta_drained_wk);
1433         }
1434 }
1435
1436 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1437                                          struct ieee80211_vif *vif)
1438 {
1439         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1440         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1441
1442         iwl_mvm_prepare_mac_removal(mvm, vif);
1443
1444         mutex_lock(&mvm->mutex);
1445
1446         if (mvm->bf_allowed_vif == mvmvif) {
1447                 mvm->bf_allowed_vif = NULL;
1448                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1449                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1450         }
1451
1452         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1453
1454         /*
1455          * For AP/GO interface, the tear down of the resources allocated to the
1456          * interface is be handled as part of the stop_ap flow.
1457          */
1458         if (vif->type == NL80211_IFTYPE_AP ||
1459             vif->type == NL80211_IFTYPE_ADHOC) {
1460 #ifdef CONFIG_NL80211_TESTMODE
1461                 if (vif == mvm->noa_vif) {
1462                         mvm->noa_vif = NULL;
1463                         mvm->noa_duration = 0;
1464                 }
1465 #endif
1466                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1467                 goto out_release;
1468         }
1469
1470         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1471                 mvm->p2p_device_vif = NULL;
1472                 iwl_mvm_rm_bcast_sta(mvm, vif);
1473                 iwl_mvm_binding_remove_vif(mvm, vif);
1474                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1475                 mvmvif->phy_ctxt = NULL;
1476         }
1477
1478         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1479                 mvm->vif_count--;
1480
1481         iwl_mvm_power_update_mac(mvm);
1482         iwl_mvm_mac_ctxt_remove(mvm, vif);
1483
1484 out_release:
1485         iwl_mvm_mac_ctxt_release(mvm, vif);
1486         mutex_unlock(&mvm->mutex);
1487 }
1488
1489 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1490 {
1491         return 0;
1492 }
1493
1494 struct iwl_mvm_mc_iter_data {
1495         struct iwl_mvm *mvm;
1496         int port_id;
1497 };
1498
1499 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1500                                       struct ieee80211_vif *vif)
1501 {
1502         struct iwl_mvm_mc_iter_data *data = _data;
1503         struct iwl_mvm *mvm = data->mvm;
1504         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1505         int ret, len;
1506
1507         /* if we don't have free ports, mcast frames will be dropped */
1508         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1509                 return;
1510
1511         if (vif->type != NL80211_IFTYPE_STATION ||
1512             !vif->bss_conf.assoc)
1513                 return;
1514
1515         cmd->port_id = data->port_id++;
1516         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1517         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1518
1519         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1520         if (ret)
1521                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1522 }
1523
1524 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1525 {
1526         struct iwl_mvm_mc_iter_data iter_data = {
1527                 .mvm = mvm,
1528         };
1529
1530         lockdep_assert_held(&mvm->mutex);
1531
1532         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1533                 return;
1534
1535         ieee80211_iterate_active_interfaces_atomic(
1536                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1537                 iwl_mvm_mc_iface_iterator, &iter_data);
1538 }
1539
1540 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1541                                      struct netdev_hw_addr_list *mc_list)
1542 {
1543         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1544         struct iwl_mcast_filter_cmd *cmd;
1545         struct netdev_hw_addr *addr;
1546         int addr_count;
1547         bool pass_all;
1548         int len;
1549
1550         addr_count = netdev_hw_addr_list_count(mc_list);
1551         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1552                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1553         if (pass_all)
1554                 addr_count = 0;
1555
1556         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1557         cmd = kzalloc(len, GFP_ATOMIC);
1558         if (!cmd)
1559                 return 0;
1560
1561         if (pass_all) {
1562                 cmd->pass_all = 1;
1563                 return (u64)(unsigned long)cmd;
1564         }
1565
1566         netdev_hw_addr_list_for_each(addr, mc_list) {
1567                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1568                                    cmd->count, addr->addr);
1569                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1570                        addr->addr, ETH_ALEN);
1571                 cmd->count++;
1572         }
1573
1574         return (u64)(unsigned long)cmd;
1575 }
1576
1577 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1578                                      unsigned int changed_flags,
1579                                      unsigned int *total_flags,
1580                                      u64 multicast)
1581 {
1582         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1583         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1584
1585         mutex_lock(&mvm->mutex);
1586
1587         /* replace previous configuration */
1588         kfree(mvm->mcast_filter_cmd);
1589         mvm->mcast_filter_cmd = cmd;
1590
1591         if (!cmd)
1592                 goto out;
1593
1594         iwl_mvm_recalc_multicast(mvm);
1595 out:
1596         mutex_unlock(&mvm->mutex);
1597         *total_flags = 0;
1598 }
1599
1600 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1601                                         struct ieee80211_vif *vif,
1602                                         unsigned int filter_flags,
1603                                         unsigned int changed_flags)
1604 {
1605         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1606
1607         /* We support only filter for probe requests */
1608         if (!(changed_flags & FIF_PROBE_REQ))
1609                 return;
1610
1611         /* Supported only for p2p client interfaces */
1612         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1613             !vif->p2p)
1614                 return;
1615
1616         mutex_lock(&mvm->mutex);
1617         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1618         mutex_unlock(&mvm->mutex);
1619 }
1620
1621 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1622 struct iwl_bcast_iter_data {
1623         struct iwl_mvm *mvm;
1624         struct iwl_bcast_filter_cmd *cmd;
1625         u8 current_filter;
1626 };
1627
1628 static void
1629 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1630                          const struct iwl_fw_bcast_filter *in_filter,
1631                          struct iwl_fw_bcast_filter *out_filter)
1632 {
1633         struct iwl_fw_bcast_filter_attr *attr;
1634         int i;
1635
1636         memcpy(out_filter, in_filter, sizeof(*out_filter));
1637
1638         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1639                 attr = &out_filter->attrs[i];
1640
1641                 if (!attr->mask)
1642                         break;
1643
1644                 switch (attr->reserved1) {
1645                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1646                         if (vif->bss_conf.arp_addr_cnt != 1) {
1647                                 attr->mask = 0;
1648                                 continue;
1649                         }
1650
1651                         attr->val = vif->bss_conf.arp_addr_list[0];
1652                         break;
1653                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1654                         attr->val = *(__be32 *)&vif->addr[2];
1655                         break;
1656                 default:
1657                         break;
1658                 }
1659                 attr->reserved1 = 0;
1660                 out_filter->num_attrs++;
1661         }
1662 }
1663
1664 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1665                                           struct ieee80211_vif *vif)
1666 {
1667         struct iwl_bcast_iter_data *data = _data;
1668         struct iwl_mvm *mvm = data->mvm;
1669         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1670         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1671         struct iwl_fw_bcast_mac *bcast_mac;
1672         int i;
1673
1674         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1675                 return;
1676
1677         bcast_mac = &cmd->macs[mvmvif->id];
1678
1679         /*
1680          * enable filtering only for associated stations, but not for P2P
1681          * Clients
1682          */
1683         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1684             !vif->bss_conf.assoc)
1685                 return;
1686
1687         bcast_mac->default_discard = 1;
1688
1689         /* copy all configured filters */
1690         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1691                 /*
1692                  * Make sure we don't exceed our filters limit.
1693                  * if there is still a valid filter to be configured,
1694                  * be on the safe side and just allow bcast for this mac.
1695                  */
1696                 if (WARN_ON_ONCE(data->current_filter >=
1697                                  ARRAY_SIZE(cmd->filters))) {
1698                         bcast_mac->default_discard = 0;
1699                         bcast_mac->attached_filters = 0;
1700                         break;
1701                 }
1702
1703                 iwl_mvm_set_bcast_filter(vif,
1704                                          &mvm->bcast_filters[i],
1705                                          &cmd->filters[data->current_filter]);
1706
1707                 /* skip current filter if it contains no attributes */
1708                 if (!cmd->filters[data->current_filter].num_attrs)
1709                         continue;
1710
1711                 /* attach the filter to current mac */
1712                 bcast_mac->attached_filters |=
1713                                 cpu_to_le16(BIT(data->current_filter));
1714
1715                 data->current_filter++;
1716         }
1717 }
1718
1719 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1720                                     struct iwl_bcast_filter_cmd *cmd)
1721 {
1722         struct iwl_bcast_iter_data iter_data = {
1723                 .mvm = mvm,
1724                 .cmd = cmd,
1725         };
1726
1727         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1728                 return false;
1729
1730         memset(cmd, 0, sizeof(*cmd));
1731         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1732         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1733
1734 #ifdef CONFIG_IWLWIFI_DEBUGFS
1735         /* use debugfs filters/macs if override is configured */
1736         if (mvm->dbgfs_bcast_filtering.override) {
1737                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1738                        sizeof(cmd->filters));
1739                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1740                        sizeof(cmd->macs));
1741                 return true;
1742         }
1743 #endif
1744
1745         /* if no filters are configured, do nothing */
1746         if (!mvm->bcast_filters)
1747                 return false;
1748
1749         /* configure and attach these filters for each associated sta vif */
1750         ieee80211_iterate_active_interfaces(
1751                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1752                 iwl_mvm_bcast_filter_iterator, &iter_data);
1753
1754         return true;
1755 }
1756
1757 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1758 {
1759         struct iwl_bcast_filter_cmd cmd;
1760
1761         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1762                 return 0;
1763
1764         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1765                 return 0;
1766
1767         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1768                                     sizeof(cmd), &cmd);
1769 }
1770 #else
1771 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1772 {
1773         return 0;
1774 }
1775 #endif
1776
1777 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1778                                     struct ieee80211_vif *vif)
1779 {
1780         struct iwl_mu_group_mgmt_cmd cmd = {};
1781
1782         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1783                WLAN_MEMBERSHIP_LEN);
1784         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1785                WLAN_USER_POSITION_LEN);
1786
1787         return iwl_mvm_send_cmd_pdu(mvm,
1788                                     WIDE_ID(DATA_PATH_GROUP,
1789                                             UPDATE_MU_GROUPS_CMD),
1790                                     0, sizeof(cmd), &cmd);
1791 }
1792
1793 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1794                                            struct ieee80211_vif *vif)
1795 {
1796         if (vif->mu_mimo_owner) {
1797                 struct iwl_mu_group_mgmt_notif *notif = _data;
1798
1799                 /*
1800                  * MU-MIMO Group Id action frame is little endian. We treat
1801                  * the data received from firmware as if it came from the
1802                  * action frame, so no conversion is needed.
1803                  */
1804                 ieee80211_update_mu_groups(vif,
1805                                            (u8 *)&notif->membership_status,
1806                                            (u8 *)&notif->user_position);
1807         }
1808 }
1809
1810 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1811                                struct iwl_rx_cmd_buffer *rxb)
1812 {
1813         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1814         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1815
1816         ieee80211_iterate_active_interfaces_atomic(
1817                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1818                         iwl_mvm_mu_mimo_iface_iterator, notif);
1819 }
1820
1821 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1822                                              struct ieee80211_vif *vif,
1823                                              struct ieee80211_bss_conf *bss_conf,
1824                                              u32 changes)
1825 {
1826         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1827         int ret;
1828
1829         /*
1830          * Re-calculate the tsf id, as the master-slave relations depend on the
1831          * beacon interval, which was not known when the station interface was
1832          * added.
1833          */
1834         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1835                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1836
1837         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1838             mvmvif->lqm_active)
1839                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1840                                      0, 0);
1841
1842         /*
1843          * If we're not associated yet, take the (new) BSSID before associating
1844          * so the firmware knows. If we're already associated, then use the old
1845          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1846          * branch for disassociation below.
1847          */
1848         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1849                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1850
1851         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1852         if (ret)
1853                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1854
1855         /* after sending it once, adopt mac80211 data */
1856         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1857         mvmvif->associated = bss_conf->assoc;
1858
1859         if (changes & BSS_CHANGED_ASSOC) {
1860                 if (bss_conf->assoc) {
1861                         /* clear statistics to get clean beacon counter */
1862                         iwl_mvm_request_statistics(mvm, true);
1863                         memset(&mvmvif->beacon_stats, 0,
1864                                sizeof(mvmvif->beacon_stats));
1865
1866                         /* add quota for this interface */
1867                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1868                         if (ret) {
1869                                 IWL_ERR(mvm, "failed to update quotas\n");
1870                                 return;
1871                         }
1872
1873                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1874                                      &mvm->status)) {
1875                                 /*
1876                                  * If we're restarting then the firmware will
1877                                  * obviously have lost synchronisation with
1878                                  * the AP. It will attempt to synchronise by
1879                                  * itself, but we can make it more reliable by
1880                                  * scheduling a session protection time event.
1881                                  *
1882                                  * The firmware needs to receive a beacon to
1883                                  * catch up with synchronisation, use 110% of
1884                                  * the beacon interval.
1885                                  *
1886                                  * Set a large maximum delay to allow for more
1887                                  * than a single interface.
1888                                  */
1889                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1890                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1891                                                         5 * dur, false);
1892                         }
1893
1894                         iwl_mvm_sf_update(mvm, vif, false);
1895                         iwl_mvm_power_vif_assoc(mvm, vif);
1896                         if (vif->p2p) {
1897                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1898                                 iwl_mvm_update_smps(mvm, vif,
1899                                                     IWL_MVM_SMPS_REQ_PROT,
1900                                                     IEEE80211_SMPS_DYNAMIC);
1901                         }
1902                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1903                         /*
1904                          * If update fails - SF might be running in associated
1905                          * mode while disassociated - which is forbidden.
1906                          */
1907                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1908                                   "Failed to update SF upon disassociation\n");
1909
1910                         /* remove AP station now that the MAC is unassoc */
1911                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1912                         if (ret)
1913                                 IWL_ERR(mvm, "failed to remove AP station\n");
1914
1915                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1916                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1917                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1918                         /* remove quota for this interface */
1919                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1920                         if (ret)
1921                                 IWL_ERR(mvm, "failed to update quotas\n");
1922
1923                         if (vif->p2p)
1924                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1925
1926                         /* this will take the cleared BSSID from bss_conf */
1927                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1928                         if (ret)
1929                                 IWL_ERR(mvm,
1930                                         "failed to update MAC %pM (clear after unassoc)\n",
1931                                         vif->addr);
1932                 }
1933
1934                 /*
1935                  * The firmware tracks the MU-MIMO group on its own.
1936                  * However, on HW restart we should restore this data.
1937                  */
1938                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1939                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1940                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1941                         if (ret)
1942                                 IWL_ERR(mvm,
1943                                         "failed to update VHT MU_MIMO groups\n");
1944                 }
1945
1946                 iwl_mvm_recalc_multicast(mvm);
1947                 iwl_mvm_configure_bcast_filter(mvm);
1948
1949                 /* reset rssi values */
1950                 mvmvif->bf_data.ave_beacon_signal = 0;
1951
1952                 iwl_mvm_bt_coex_vif_change(mvm);
1953                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1954                                     IEEE80211_SMPS_AUTOMATIC);
1955                 if (fw_has_capa(&mvm->fw->ucode_capa,
1956                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1957                         iwl_mvm_config_scan(mvm);
1958         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1959                 /*
1960                  * We received a beacon _after_ association so
1961                  * remove the session protection.
1962                  */
1963                 iwl_mvm_remove_time_event(mvm, mvmvif,
1964                                           &mvmvif->time_event_data);
1965         }
1966
1967         if (changes & BSS_CHANGED_BEACON_INFO) {
1968                 iwl_mvm_sf_update(mvm, vif, false);
1969                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1970         }
1971
1972         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
1973                        /*
1974                         * Send power command on every beacon change,
1975                         * because we may have not enabled beacon abort yet.
1976                         */
1977                        BSS_CHANGED_BEACON_INFO)) {
1978                 ret = iwl_mvm_power_update_mac(mvm);
1979                 if (ret)
1980                         IWL_ERR(mvm, "failed to update power mode\n");
1981         }
1982
1983         if (changes & BSS_CHANGED_TXPOWER) {
1984                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1985                                 bss_conf->txpower);
1986                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1987         }
1988
1989         if (changes & BSS_CHANGED_CQM) {
1990                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1991                 /* reset cqm events tracking */
1992                 mvmvif->bf_data.last_cqm_event = 0;
1993                 if (mvmvif->bf_data.bf_enabled) {
1994                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1995                         if (ret)
1996                                 IWL_ERR(mvm,
1997                                         "failed to update CQM thresholds\n");
1998                 }
1999         }
2000
2001         if (changes & BSS_CHANGED_ARP_FILTER) {
2002                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2003                 iwl_mvm_configure_bcast_filter(mvm);
2004         }
2005 }
2006
2007 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2008                                  struct ieee80211_vif *vif)
2009 {
2010         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2011         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2012         int ret;
2013
2014         /*
2015          * iwl_mvm_mac_ctxt_add() might read directly from the device
2016          * (the system time), so make sure it is available.
2017          */
2018         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2019         if (ret)
2020                 return ret;
2021
2022         mutex_lock(&mvm->mutex);
2023
2024         /* Send the beacon template */
2025         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2026         if (ret)
2027                 goto out_unlock;
2028
2029         /*
2030          * Re-calculate the tsf id, as the master-slave relations depend on the
2031          * beacon interval, which was not known when the AP interface was added.
2032          */
2033         if (vif->type == NL80211_IFTYPE_AP)
2034                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2035
2036         mvmvif->ap_assoc_sta_count = 0;
2037
2038         /* Add the mac context */
2039         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2040         if (ret)
2041                 goto out_unlock;
2042
2043         /* Perform the binding */
2044         ret = iwl_mvm_binding_add_vif(mvm, vif);
2045         if (ret)
2046                 goto out_remove;
2047
2048         /* Send the bcast station. At this stage the TBTT and DTIM time events
2049          * are added and applied to the scheduler */
2050         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2051         if (ret)
2052                 goto out_unbind;
2053
2054         /* must be set before quota calculations */
2055         mvmvif->ap_ibss_active = true;
2056
2057         /* power updated needs to be done before quotas */
2058         iwl_mvm_power_update_mac(mvm);
2059
2060         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2061         if (ret)
2062                 goto out_quota_failed;
2063
2064         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2065         if (vif->p2p && mvm->p2p_device_vif)
2066                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2067
2068         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2069
2070         iwl_mvm_bt_coex_vif_change(mvm);
2071
2072         /* we don't support TDLS during DCM */
2073         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2074                 iwl_mvm_teardown_tdls_peers(mvm);
2075
2076         goto out_unlock;
2077
2078 out_quota_failed:
2079         iwl_mvm_power_update_mac(mvm);
2080         mvmvif->ap_ibss_active = false;
2081         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2082 out_unbind:
2083         iwl_mvm_binding_remove_vif(mvm, vif);
2084 out_remove:
2085         iwl_mvm_mac_ctxt_remove(mvm, vif);
2086 out_unlock:
2087         mutex_unlock(&mvm->mutex);
2088         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2089         return ret;
2090 }
2091
2092 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2093                                  struct ieee80211_vif *vif)
2094 {
2095         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2096         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2097
2098         iwl_mvm_prepare_mac_removal(mvm, vif);
2099
2100         mutex_lock(&mvm->mutex);
2101
2102         /* Handle AP stop while in CSA */
2103         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2104                 iwl_mvm_remove_time_event(mvm, mvmvif,
2105                                           &mvmvif->time_event_data);
2106                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2107                 mvmvif->csa_countdown = false;
2108         }
2109
2110         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2111                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2112                 mvm->csa_tx_block_bcn_timeout = 0;
2113         }
2114
2115         mvmvif->ap_ibss_active = false;
2116         mvm->ap_last_beacon_gp2 = 0;
2117
2118         iwl_mvm_bt_coex_vif_change(mvm);
2119
2120         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2121
2122         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2123         if (vif->p2p && mvm->p2p_device_vif)
2124                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2125
2126         iwl_mvm_update_quotas(mvm, false, NULL);
2127         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2128         iwl_mvm_binding_remove_vif(mvm, vif);
2129
2130         iwl_mvm_power_update_mac(mvm);
2131
2132         iwl_mvm_mac_ctxt_remove(mvm, vif);
2133
2134         mutex_unlock(&mvm->mutex);
2135 }
2136
2137 static void
2138 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2139                                  struct ieee80211_vif *vif,
2140                                  struct ieee80211_bss_conf *bss_conf,
2141                                  u32 changes)
2142 {
2143         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2144
2145         /* Changes will be applied when the AP/IBSS is started */
2146         if (!mvmvif->ap_ibss_active)
2147                 return;
2148
2149         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2150                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2151             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2152                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2153
2154         /* Need to send a new beacon template to the FW */
2155         if (changes & BSS_CHANGED_BEACON &&
2156             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2157                 IWL_WARN(mvm, "Failed updating beacon data\n");
2158
2159         if (changes & BSS_CHANGED_TXPOWER) {
2160                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2161                                 bss_conf->txpower);
2162                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2163         }
2164 }
2165
2166 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2167                                      struct ieee80211_vif *vif,
2168                                      struct ieee80211_bss_conf *bss_conf,
2169                                      u32 changes)
2170 {
2171         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2172
2173         /*
2174          * iwl_mvm_bss_info_changed_station() might call
2175          * iwl_mvm_protect_session(), which reads directly from
2176          * the device (the system time), so make sure it is available.
2177          */
2178         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2179                 return;
2180
2181         mutex_lock(&mvm->mutex);
2182
2183         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2184                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2185
2186         switch (vif->type) {
2187         case NL80211_IFTYPE_STATION:
2188                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2189                 break;
2190         case NL80211_IFTYPE_AP:
2191         case NL80211_IFTYPE_ADHOC:
2192                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2193                 break;
2194         default:
2195                 /* shouldn't happen */
2196                 WARN_ON_ONCE(1);
2197         }
2198
2199         mutex_unlock(&mvm->mutex);
2200         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2201 }
2202
2203 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2204                                struct ieee80211_vif *vif,
2205                                struct ieee80211_scan_request *hw_req)
2206 {
2207         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2208         int ret;
2209
2210         if (hw_req->req.n_channels == 0 ||
2211             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2212                 return -EINVAL;
2213
2214         mutex_lock(&mvm->mutex);
2215         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2216         mutex_unlock(&mvm->mutex);
2217
2218         return ret;
2219 }
2220
2221 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2222                                        struct ieee80211_vif *vif)
2223 {
2224         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2225
2226         mutex_lock(&mvm->mutex);
2227
2228         /* Due to a race condition, it's possible that mac80211 asks
2229          * us to stop a hw_scan when it's already stopped.  This can
2230          * happen, for instance, if we stopped the scan ourselves,
2231          * called ieee80211_scan_completed() and the userspace called
2232          * cancel scan scan before ieee80211_scan_work() could run.
2233          * To handle that, simply return if the scan is not running.
2234         */
2235         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2236                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2237
2238         mutex_unlock(&mvm->mutex);
2239 }
2240
2241 static void
2242 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2243                                   struct ieee80211_sta *sta, u16 tids,
2244                                   int num_frames,
2245                                   enum ieee80211_frame_release_type reason,
2246                                   bool more_data)
2247 {
2248         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2249
2250         /* Called when we need to transmit (a) frame(s) from mac80211 */
2251
2252         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2253                                           tids, more_data, false);
2254 }
2255
2256 static void
2257 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2258                                     struct ieee80211_sta *sta, u16 tids,
2259                                     int num_frames,
2260                                     enum ieee80211_frame_release_type reason,
2261                                     bool more_data)
2262 {
2263         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2264
2265         /* Called when we need to transmit (a) frame(s) from agg queue */
2266
2267         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2268                                           tids, more_data, true);
2269 }
2270
2271 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2272                                    struct ieee80211_vif *vif,
2273                                    enum sta_notify_cmd cmd,
2274                                    struct ieee80211_sta *sta)
2275 {
2276         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2277         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2278         unsigned long txqs = 0, tids = 0;
2279         int tid;
2280
2281         spin_lock_bh(&mvmsta->lock);
2282         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2283                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2284
2285                 if (tid_data->state != IWL_AGG_ON &&
2286                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2287                         continue;
2288
2289                 __set_bit(tid_data->txq_id, &txqs);
2290
2291                 if (iwl_mvm_tid_queued(tid_data) == 0)
2292                         continue;
2293
2294                 __set_bit(tid, &tids);
2295         }
2296
2297         switch (cmd) {
2298         case STA_NOTIFY_SLEEP:
2299                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2300                         ieee80211_sta_block_awake(hw, sta, true);
2301
2302                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2303                         ieee80211_sta_set_buffered(sta, tid, true);
2304
2305                 if (txqs)
2306                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2307                 /*
2308                  * The fw updates the STA to be asleep. Tx packets on the Tx
2309                  * queues to this station will not be transmitted. The fw will
2310                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2311                  */
2312                 break;
2313         case STA_NOTIFY_AWAKE:
2314                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2315                         break;
2316
2317                 if (txqs)
2318                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2319                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2320                 break;
2321         default:
2322                 break;
2323         }
2324         spin_unlock_bh(&mvmsta->lock);
2325 }
2326
2327 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2328                                        struct ieee80211_vif *vif,
2329                                        struct ieee80211_sta *sta)
2330 {
2331         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2332         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2333
2334         /*
2335          * This is called before mac80211 does RCU synchronisation,
2336          * so here we already invalidate our internal RCU-protected
2337          * station pointer. The rest of the code will thus no longer
2338          * be able to find the station this way, and we don't rely
2339          * on further RCU synchronisation after the sta_state()
2340          * callback deleted the station.
2341          */
2342         mutex_lock(&mvm->mutex);
2343         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2344                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2345                                    ERR_PTR(-ENOENT));
2346
2347         mutex_unlock(&mvm->mutex);
2348 }
2349
2350 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2351                                 const u8 *bssid)
2352 {
2353         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2354                 return;
2355
2356         if (vif->p2p && !iwl_mvm_is_p2p_standalone_uapsd_supported(mvm)) {
2357                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2358                 return;
2359         }
2360
2361         if (!vif->p2p &&
2362             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2363                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2364                 return;
2365         }
2366
2367         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2368 }
2369
2370 static void
2371 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2372                            struct ieee80211_vif *vif, u8 *peer_addr,
2373                            enum nl80211_tdls_operation action)
2374 {
2375         struct iwl_fw_dbg_trigger_tlv *trig;
2376         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2377
2378         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2379                 return;
2380
2381         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2382         tdls_trig = (void *)trig->data;
2383         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2384                 return;
2385
2386         if (!(tdls_trig->action_bitmap & BIT(action)))
2387                 return;
2388
2389         if (tdls_trig->peer_mode &&
2390             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2391                 return;
2392
2393         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2394                                     "TDLS event occurred, peer %pM, action %d",
2395                                     peer_addr, action);
2396 }
2397
2398 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2399                                              struct iwl_mvm_sta *mvm_sta)
2400 {
2401         struct iwl_mvm_tid_data *tid_data;
2402         struct sk_buff *skb;
2403         int i;
2404
2405         spin_lock_bh(&mvm_sta->lock);
2406         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2407                 tid_data = &mvm_sta->tid_data[i];
2408                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2409                         ieee80211_free_txskb(mvm->hw, skb);
2410         }
2411         spin_unlock_bh(&mvm_sta->lock);
2412 }
2413
2414 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2415                                  struct ieee80211_vif *vif,
2416                                  struct ieee80211_sta *sta,
2417                                  enum ieee80211_sta_state old_state,
2418                                  enum ieee80211_sta_state new_state)
2419 {
2420         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2421         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2422         int ret;
2423
2424         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2425                            sta->addr, old_state, new_state);
2426
2427         /* this would be a mac80211 bug ... but don't crash */
2428         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2429                 return -EINVAL;
2430
2431         /* if a STA is being removed, reuse its ID */
2432         flush_work(&mvm->sta_drained_wk);
2433
2434         /*
2435          * If we are in a STA removal flow and in DQA mode:
2436          *
2437          * This is after the sync_rcu part, so the queues have already been
2438          * flushed. No more TXs on their way in mac80211's path, and no more in
2439          * the queues.
2440          * Also, we won't be getting any new TX frames for this station.
2441          * What we might have are deferred TX frames that need to be taken care
2442          * of.
2443          *
2444          * Drop any still-queued deferred-frame before removing the STA, and
2445          * make sure the worker is no longer handling frames for this STA.
2446          */
2447         if (old_state == IEEE80211_STA_NONE &&
2448             new_state == IEEE80211_STA_NOTEXIST &&
2449             iwl_mvm_is_dqa_supported(mvm)) {
2450                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2451
2452                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2453                 flush_work(&mvm->add_stream_wk);
2454
2455                 /*
2456                  * No need to make sure deferred TX indication is off since the
2457                  * worker will already remove it if it was on
2458                  */
2459         }
2460
2461         mutex_lock(&mvm->mutex);
2462         if (old_state == IEEE80211_STA_NOTEXIST &&
2463             new_state == IEEE80211_STA_NONE) {
2464                 /*
2465                  * Firmware bug - it'll crash if the beacon interval is less
2466                  * than 16. We can't avoid connecting at all, so refuse the
2467                  * station state change, this will cause mac80211 to abandon
2468                  * attempts to connect to this AP, and eventually wpa_s will
2469                  * blacklist the AP...
2470                  */
2471                 if (vif->type == NL80211_IFTYPE_STATION &&
2472                     vif->bss_conf.beacon_int < 16) {
2473                         IWL_ERR(mvm,
2474                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2475                                 sta->addr, vif->bss_conf.beacon_int);
2476                         ret = -EINVAL;
2477                         goto out_unlock;
2478                 }
2479
2480                 if (sta->tdls &&
2481                     (vif->p2p ||
2482                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2483                                                 IWL_MVM_TDLS_STA_COUNT ||
2484                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2485                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2486                         ret = -EBUSY;
2487                         goto out_unlock;
2488                 }
2489
2490                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2491                 if (sta->tdls && ret == 0) {
2492                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2493                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2494                                                    NL80211_TDLS_SETUP);
2495                 }
2496         } else if (old_state == IEEE80211_STA_NONE &&
2497                    new_state == IEEE80211_STA_AUTH) {
2498                 /*
2499                  * EBS may be disabled due to previous failures reported by FW.
2500                  * Reset EBS status here assuming environment has been changed.
2501                  */
2502                 mvm->last_ebs_successful = true;
2503                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2504                 ret = 0;
2505         } else if (old_state == IEEE80211_STA_AUTH &&
2506                    new_state == IEEE80211_STA_ASSOC) {
2507                 if (vif->type == NL80211_IFTYPE_AP) {
2508                         mvmvif->ap_assoc_sta_count++;
2509                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2510                 }
2511                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2512                 if (ret == 0)
2513                         iwl_mvm_rs_rate_init(mvm, sta,
2514                                              mvmvif->phy_ctxt->channel->band,
2515                                              true);
2516         } else if (old_state == IEEE80211_STA_ASSOC &&
2517                    new_state == IEEE80211_STA_AUTHORIZED) {
2518
2519                 /* we don't support TDLS during DCM */
2520                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2521                         iwl_mvm_teardown_tdls_peers(mvm);
2522
2523                 if (sta->tdls)
2524                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2525                                                    NL80211_TDLS_ENABLE_LINK);
2526
2527                 /* enable beacon filtering */
2528                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2529                 ret = 0;
2530         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2531                    new_state == IEEE80211_STA_ASSOC) {
2532                 /* disable beacon filtering */
2533                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2534                 ret = 0;
2535         } else if (old_state == IEEE80211_STA_ASSOC &&
2536                    new_state == IEEE80211_STA_AUTH) {
2537                 if (vif->type == NL80211_IFTYPE_AP) {
2538                         mvmvif->ap_assoc_sta_count--;
2539                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2540                 }
2541                 ret = 0;
2542         } else if (old_state == IEEE80211_STA_AUTH &&
2543                    new_state == IEEE80211_STA_NONE) {
2544                 ret = 0;
2545         } else if (old_state == IEEE80211_STA_NONE &&
2546                    new_state == IEEE80211_STA_NOTEXIST) {
2547                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2548                 if (sta->tdls) {
2549                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2550                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2551                                                    NL80211_TDLS_DISABLE_LINK);
2552                 }
2553         } else {
2554                 ret = -EIO;
2555         }
2556  out_unlock:
2557         mutex_unlock(&mvm->mutex);
2558
2559         if (sta->tdls && ret == 0) {
2560                 if (old_state == IEEE80211_STA_NOTEXIST &&
2561                     new_state == IEEE80211_STA_NONE)
2562                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2563                 else if (old_state == IEEE80211_STA_NONE &&
2564                          new_state == IEEE80211_STA_NOTEXIST)
2565                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2566         }
2567
2568         return ret;
2569 }
2570
2571 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2572 {
2573         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2574
2575         mvm->rts_threshold = value;
2576
2577         return 0;
2578 }
2579
2580 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2581                                   struct ieee80211_vif *vif,
2582                                   struct ieee80211_sta *sta, u32 changed)
2583 {
2584         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2585
2586         if (vif->type == NL80211_IFTYPE_STATION &&
2587             changed & IEEE80211_RC_NSS_CHANGED)
2588                 iwl_mvm_sf_update(mvm, vif, false);
2589 }
2590
2591 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2592                                struct ieee80211_vif *vif, u16 ac,
2593                                const struct ieee80211_tx_queue_params *params)
2594 {
2595         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2596         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2597
2598         mvmvif->queue_params[ac] = *params;
2599
2600         /*
2601          * No need to update right away, we'll get BSS_CHANGED_QOS
2602          * The exception is P2P_DEVICE interface which needs immediate update.
2603          */
2604         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2605                 int ret;
2606
2607                 mutex_lock(&mvm->mutex);
2608                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2609                 mutex_unlock(&mvm->mutex);
2610                 return ret;
2611         }
2612         return 0;
2613 }
2614
2615 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2616                                       struct ieee80211_vif *vif)
2617 {
2618         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2619         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2620         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2621
2622         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2623                 return;
2624
2625         /*
2626          * iwl_mvm_protect_session() reads directly from the device
2627          * (the system time), so make sure it is available.
2628          */
2629         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2630                 return;
2631
2632         mutex_lock(&mvm->mutex);
2633         /* Try really hard to protect the session and hear a beacon */
2634         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2635         mutex_unlock(&mvm->mutex);
2636
2637         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2638 }
2639
2640 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2641                                         struct ieee80211_vif *vif,
2642                                         struct cfg80211_sched_scan_request *req,
2643                                         struct ieee80211_scan_ies *ies)
2644 {
2645         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2646
2647         int ret;
2648
2649         mutex_lock(&mvm->mutex);
2650
2651         if (!vif->bss_conf.idle) {
2652                 ret = -EBUSY;
2653                 goto out;
2654         }
2655
2656         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2657
2658 out:
2659         mutex_unlock(&mvm->mutex);
2660         return ret;
2661 }
2662
2663 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2664                                        struct ieee80211_vif *vif)
2665 {
2666         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2667         int ret;
2668
2669         mutex_lock(&mvm->mutex);
2670
2671         /* Due to a race condition, it's possible that mac80211 asks
2672          * us to stop a sched_scan when it's already stopped.  This
2673          * can happen, for instance, if we stopped the scan ourselves,
2674          * called ieee80211_sched_scan_stopped() and the userspace called
2675          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2676          * could run.  To handle this, simply return if the scan is
2677          * not running.
2678         */
2679         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2680                 mutex_unlock(&mvm->mutex);
2681                 return 0;
2682         }
2683
2684         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2685         mutex_unlock(&mvm->mutex);
2686         iwl_mvm_wait_for_async_handlers(mvm);
2687
2688         return ret;
2689 }
2690
2691 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2692                                enum set_key_cmd cmd,
2693                                struct ieee80211_vif *vif,
2694                                struct ieee80211_sta *sta,
2695                                struct ieee80211_key_conf *key)
2696 {
2697         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2698         struct iwl_mvm_sta *mvmsta;
2699         struct iwl_mvm_key_pn *ptk_pn;
2700         int keyidx = key->keyidx;
2701         int ret;
2702         u8 key_offset;
2703
2704         if (iwlwifi_mod_params.sw_crypto) {
2705                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2706                 return -EOPNOTSUPP;
2707         }
2708
2709         switch (key->cipher) {
2710         case WLAN_CIPHER_SUITE_TKIP:
2711                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2712                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2713                 break;
2714         case WLAN_CIPHER_SUITE_CCMP:
2715                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2716                 break;
2717         case WLAN_CIPHER_SUITE_AES_CMAC:
2718                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2719                 break;
2720         case WLAN_CIPHER_SUITE_WEP40:
2721         case WLAN_CIPHER_SUITE_WEP104:
2722                 /* For non-client mode, only use WEP keys for TX as we probably
2723                  * don't have a station yet anyway and would then have to keep
2724                  * track of the keys, linking them to each of the clients/peers
2725                  * as they appear. For now, don't do that, for performance WEP
2726                  * offload doesn't really matter much, but we need it for some
2727                  * other offload features in client mode.
2728                  */
2729                 if (vif->type != NL80211_IFTYPE_STATION)
2730                         return 0;
2731                 break;
2732         default:
2733                 /* currently FW supports only one optional cipher scheme */
2734                 if (hw->n_cipher_schemes &&
2735                     hw->cipher_schemes->cipher == key->cipher)
2736                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2737                 else
2738                         return -EOPNOTSUPP;
2739         }
2740
2741         mutex_lock(&mvm->mutex);
2742
2743         switch (cmd) {
2744         case SET_KEY:
2745                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2746                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2747                         /*
2748                          * GTK on AP interface is a TX-only key, return 0;
2749                          * on IBSS they're per-station and because we're lazy
2750                          * we don't support them for RX, so do the same.
2751                          * CMAC in AP/IBSS modes must be done in software.
2752                          */
2753                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2754                                 ret = -EOPNOTSUPP;
2755                         else
2756                                 ret = 0;
2757                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2758                         break;
2759                 }
2760
2761                 /* During FW restart, in order to restore the state as it was,
2762                  * don't try to reprogram keys we previously failed for.
2763                  */
2764                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2765                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2766                         IWL_DEBUG_MAC80211(mvm,
2767                                            "skip invalid idx key programming during restart\n");
2768                         ret = 0;
2769                         break;
2770                 }
2771
2772                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2773                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2774                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2775                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2776                      key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2777                         struct ieee80211_key_seq seq;
2778                         int tid, q;
2779
2780                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2781                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2782                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2783                                          mvm->trans->num_rx_queues *
2784                                                 sizeof(ptk_pn->q[0]),
2785                                          GFP_KERNEL);
2786                         if (!ptk_pn) {
2787                                 ret = -ENOMEM;
2788                                 break;
2789                         }
2790
2791                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2792                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2793                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2794                                         memcpy(ptk_pn->q[q].pn[tid],
2795                                                seq.ccmp.pn,
2796                                                IEEE80211_CCMP_PN_LEN);
2797                         }
2798
2799                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2800                 }
2801
2802                 /* in HW restart reuse the index, otherwise request a new one */
2803                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2804                         key_offset = key->hw_key_idx;
2805                 else
2806                         key_offset = STA_KEY_IDX_INVALID;
2807
2808                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2809                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2810                 if (ret) {
2811                         IWL_WARN(mvm, "set key failed\n");
2812                         /*
2813                          * can't add key for RX, but we don't need it
2814                          * in the device for TX so still return 0
2815                          */
2816                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2817                         ret = 0;
2818                 }
2819
2820                 break;
2821         case DISABLE_KEY:
2822                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2823                         ret = 0;
2824                         break;
2825                 }
2826
2827                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2828                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2829                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2830                      key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2831                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2832                         ptk_pn = rcu_dereference_protected(
2833                                                 mvmsta->ptk_pn[keyidx],
2834                                                 lockdep_is_held(&mvm->mutex));
2835                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2836                         if (ptk_pn)
2837                                 kfree_rcu(ptk_pn, rcu_head);
2838                 }
2839
2840                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2841                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2842                 break;
2843         default:
2844                 ret = -EINVAL;
2845         }
2846
2847         mutex_unlock(&mvm->mutex);
2848         return ret;
2849 }
2850
2851 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2852                                         struct ieee80211_vif *vif,
2853                                         struct ieee80211_key_conf *keyconf,
2854                                         struct ieee80211_sta *sta,
2855                                         u32 iv32, u16 *phase1key)
2856 {
2857         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2858
2859         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2860                 return;
2861
2862         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2863 }
2864
2865
2866 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2867                                struct iwl_rx_packet *pkt, void *data)
2868 {
2869         struct iwl_mvm *mvm =
2870                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2871         struct iwl_hs20_roc_res *resp;
2872         int resp_len = iwl_rx_packet_payload_len(pkt);
2873         struct iwl_mvm_time_event_data *te_data = data;
2874
2875         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2876                 return true;
2877
2878         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2879                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2880                 return true;
2881         }
2882
2883         resp = (void *)pkt->data;
2884
2885         IWL_DEBUG_TE(mvm,
2886                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2887                      resp->status, resp->event_unique_id);
2888
2889         te_data->uid = le32_to_cpu(resp->event_unique_id);
2890         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2891                      te_data->uid);
2892
2893         spin_lock_bh(&mvm->time_event_lock);
2894         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2895         spin_unlock_bh(&mvm->time_event_lock);
2896
2897         return true;
2898 }
2899
2900 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2901 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2902 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2903 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2904 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2905 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2906                                     struct ieee80211_channel *channel,
2907                                     struct ieee80211_vif *vif,
2908                                     int duration)
2909 {
2910         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2911         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2912         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2913         static const u16 time_event_response[] = { HOT_SPOT_CMD };
2914         struct iwl_notification_wait wait_time_event;
2915         u32 dtim_interval = vif->bss_conf.dtim_period *
2916                 vif->bss_conf.beacon_int;
2917         u32 req_dur, delay;
2918         struct iwl_hs20_roc_req aux_roc_req = {
2919                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2920                 .id_and_color =
2921                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2922                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2923                 /* Set the channel info data */
2924                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
2925                         PHY_BAND_24 : PHY_BAND_5,
2926                 .channel_info.channel = channel->hw_value,
2927                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2928                 /* Set the time and duration */
2929                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2930          };
2931
2932         delay = AUX_ROC_MIN_DELAY;
2933         req_dur = MSEC_TO_TU(duration);
2934
2935         /*
2936          * If we are associated we want the delay time to be at least one
2937          * dtim interval so that the FW can wait until after the DTIM and
2938          * then start the time event, this will potentially allow us to
2939          * remain off-channel for the max duration.
2940          * Since we want to use almost a whole dtim interval we would also
2941          * like the delay to be for 2-3 dtim intervals, in case there are
2942          * other time events with higher priority.
2943          */
2944         if (vif->bss_conf.assoc) {
2945                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
2946                 /* We cannot remain off-channel longer than the DTIM interval */
2947                 if (dtim_interval <= req_dur) {
2948                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
2949                         if (req_dur <= AUX_ROC_MIN_DURATION)
2950                                 req_dur = dtim_interval -
2951                                         AUX_ROC_MIN_SAFETY_BUFFER;
2952                 }
2953         }
2954
2955         aux_roc_req.duration = cpu_to_le32(req_dur);
2956         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
2957
2958         IWL_DEBUG_TE(mvm,
2959                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
2960                      channel->hw_value, req_dur, duration, delay,
2961                      dtim_interval);
2962         /* Set the node address */
2963         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2964
2965         lockdep_assert_held(&mvm->mutex);
2966
2967         spin_lock_bh(&mvm->time_event_lock);
2968
2969         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2970                 spin_unlock_bh(&mvm->time_event_lock);
2971                 return -EIO;
2972         }
2973
2974         te_data->vif = vif;
2975         te_data->duration = duration;
2976         te_data->id = HOT_SPOT_CMD;
2977
2978         spin_unlock_bh(&mvm->time_event_lock);
2979
2980         /*
2981          * Use a notification wait, which really just processes the
2982          * command response and doesn't wait for anything, in order
2983          * to be able to process the response and get the UID inside
2984          * the RX path. Using CMD_WANT_SKB doesn't work because it
2985          * stores the buffer and then wakes up this thread, by which
2986          * time another notification (that the time event started)
2987          * might already be processed unsuccessfully.
2988          */
2989         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2990                                    time_event_response,
2991                                    ARRAY_SIZE(time_event_response),
2992                                    iwl_mvm_rx_aux_roc, te_data);
2993
2994         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2995                                    &aux_roc_req);
2996
2997         if (res) {
2998                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2999                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3000                 goto out_clear_te;
3001         }
3002
3003         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3004         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3005         /* should never fail */
3006         WARN_ON_ONCE(res);
3007
3008         if (res) {
3009  out_clear_te:
3010                 spin_lock_bh(&mvm->time_event_lock);
3011                 iwl_mvm_te_clear_data(mvm, te_data);
3012                 spin_unlock_bh(&mvm->time_event_lock);
3013         }
3014
3015         return res;
3016 }
3017
3018 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3019                        struct ieee80211_vif *vif,
3020                        struct ieee80211_channel *channel,
3021                        int duration,
3022                        enum ieee80211_roc_type type)
3023 {
3024         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3025         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3026         struct cfg80211_chan_def chandef;
3027         struct iwl_mvm_phy_ctxt *phy_ctxt;
3028         int ret, i;
3029
3030         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3031                            duration, type);
3032
3033         flush_work(&mvm->roc_done_wk);
3034
3035         mutex_lock(&mvm->mutex);
3036
3037         switch (vif->type) {
3038         case NL80211_IFTYPE_STATION:
3039                 if (fw_has_capa(&mvm->fw->ucode_capa,
3040                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3041                         /* Use aux roc framework (HS20) */
3042                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3043                                                        vif, duration);
3044                         goto out_unlock;
3045                 }
3046                 IWL_ERR(mvm, "hotspot not supported\n");
3047                 ret = -EINVAL;
3048                 goto out_unlock;
3049         case NL80211_IFTYPE_P2P_DEVICE:
3050                 /* handle below */
3051                 break;
3052         default:
3053                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3054                 ret = -EINVAL;
3055                 goto out_unlock;
3056         }
3057
3058         for (i = 0; i < NUM_PHY_CTX; i++) {
3059                 phy_ctxt = &mvm->phy_ctxts[i];
3060                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3061                         continue;
3062
3063                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3064                         /*
3065                          * Unbind the P2P_DEVICE from the current PHY context,
3066                          * and if the PHY context is not used remove it.
3067                          */
3068                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3069                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3070                                 goto out_unlock;
3071
3072                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3073
3074                         /* Bind the P2P_DEVICE to the current PHY Context */
3075                         mvmvif->phy_ctxt = phy_ctxt;
3076
3077                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3078                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3079                                 goto out_unlock;
3080
3081                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3082                         goto schedule_time_event;
3083                 }
3084         }
3085
3086         /* Need to update the PHY context only if the ROC channel changed */
3087         if (channel == mvmvif->phy_ctxt->channel)
3088                 goto schedule_time_event;
3089
3090         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3091
3092         /*
3093          * Change the PHY context configuration as it is currently referenced
3094          * only by the P2P Device MAC
3095          */
3096         if (mvmvif->phy_ctxt->ref == 1) {
3097                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3098                                                &chandef, 1, 1);
3099                 if (ret)
3100                         goto out_unlock;
3101         } else {
3102                 /*
3103                  * The PHY context is shared with other MACs. Need to remove the
3104                  * P2P Device from the binding, allocate an new PHY context and
3105                  * create a new binding
3106                  */
3107                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3108                 if (!phy_ctxt) {
3109                         ret = -ENOSPC;
3110                         goto out_unlock;
3111                 }
3112
3113                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3114                                                1, 1);
3115                 if (ret) {
3116                         IWL_ERR(mvm, "Failed to change PHY context\n");
3117                         goto out_unlock;
3118                 }
3119
3120                 /* Unbind the P2P_DEVICE from the current PHY context */
3121                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3122                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3123                         goto out_unlock;
3124
3125                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3126
3127                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3128                 mvmvif->phy_ctxt = phy_ctxt;
3129
3130                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3131                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3132                         goto out_unlock;
3133
3134                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3135         }
3136
3137 schedule_time_event:
3138         /* Schedule the time events */
3139         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3140
3141 out_unlock:
3142         mutex_unlock(&mvm->mutex);
3143         IWL_DEBUG_MAC80211(mvm, "leave\n");
3144         return ret;
3145 }
3146
3147 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3148 {
3149         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3150
3151         IWL_DEBUG_MAC80211(mvm, "enter\n");
3152
3153         mutex_lock(&mvm->mutex);
3154         iwl_mvm_stop_roc(mvm);
3155         mutex_unlock(&mvm->mutex);
3156
3157         IWL_DEBUG_MAC80211(mvm, "leave\n");
3158         return 0;
3159 }
3160
3161 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3162                                  struct ieee80211_chanctx_conf *ctx)
3163 {
3164         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3165         struct iwl_mvm_phy_ctxt *phy_ctxt;
3166         int ret;
3167
3168         lockdep_assert_held(&mvm->mutex);
3169
3170         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3171
3172         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3173         if (!phy_ctxt) {
3174                 ret = -ENOSPC;
3175                 goto out;
3176         }
3177
3178         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3179                                        ctx->rx_chains_static,
3180                                        ctx->rx_chains_dynamic);
3181         if (ret) {
3182                 IWL_ERR(mvm, "Failed to add PHY context\n");
3183                 goto out;
3184         }
3185
3186         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3187         *phy_ctxt_id = phy_ctxt->id;
3188 out:
3189         return ret;
3190 }
3191
3192 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3193                                struct ieee80211_chanctx_conf *ctx)
3194 {
3195         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3196         int ret;
3197
3198         mutex_lock(&mvm->mutex);
3199         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3200         mutex_unlock(&mvm->mutex);
3201
3202         return ret;
3203 }
3204
3205 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3206                                      struct ieee80211_chanctx_conf *ctx)
3207 {
3208         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3209         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3210
3211         lockdep_assert_held(&mvm->mutex);
3212
3213         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3214 }
3215
3216 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3217                                    struct ieee80211_chanctx_conf *ctx)
3218 {
3219         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3220
3221         mutex_lock(&mvm->mutex);
3222         __iwl_mvm_remove_chanctx(mvm, ctx);
3223         mutex_unlock(&mvm->mutex);
3224 }
3225
3226 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3227                                    struct ieee80211_chanctx_conf *ctx,
3228                                    u32 changed)
3229 {
3230         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3231         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3232         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3233
3234         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3235                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3236                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3237                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3238                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3239                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3240                       phy_ctxt->ref, changed))
3241                 return;
3242
3243         mutex_lock(&mvm->mutex);
3244         iwl_mvm_bt_coex_vif_change(mvm);
3245         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3246                                  ctx->rx_chains_static,
3247                                  ctx->rx_chains_dynamic);
3248         mutex_unlock(&mvm->mutex);
3249 }
3250
3251 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3252                                         struct ieee80211_vif *vif,
3253                                         struct ieee80211_chanctx_conf *ctx,
3254                                         bool switching_chanctx)
3255 {
3256         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3257         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3258         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3259         int ret;
3260
3261         lockdep_assert_held(&mvm->mutex);
3262
3263         mvmvif->phy_ctxt = phy_ctxt;
3264
3265         switch (vif->type) {
3266         case NL80211_IFTYPE_AP:
3267                 /* only needed if we're switching chanctx (i.e. during CSA) */
3268                 if (switching_chanctx) {
3269                         mvmvif->ap_ibss_active = true;
3270                         break;
3271                 }
3272         case NL80211_IFTYPE_ADHOC:
3273                 /*
3274                  * The AP binding flow is handled as part of the start_ap flow
3275                  * (in bss_info_changed), similarly for IBSS.
3276                  */
3277                 ret = 0;
3278                 goto out;
3279         case NL80211_IFTYPE_STATION:
3280                 break;
3281         case NL80211_IFTYPE_MONITOR:
3282                 /* always disable PS when a monitor interface is active */
3283                 mvmvif->ps_disabled = true;
3284                 break;
3285         default:
3286                 ret = -EINVAL;
3287                 goto out;
3288         }
3289
3290         ret = iwl_mvm_binding_add_vif(mvm, vif);
3291         if (ret)
3292                 goto out;
3293
3294         /*
3295          * Power state must be updated before quotas,
3296          * otherwise fw will complain.
3297          */
3298         iwl_mvm_power_update_mac(mvm);
3299
3300         /* Setting the quota at this stage is only required for monitor
3301          * interfaces. For the other types, the bss_info changed flow
3302          * will handle quota settings.
3303          */
3304         if (vif->type == NL80211_IFTYPE_MONITOR) {
3305                 mvmvif->monitor_active = true;
3306                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3307                 if (ret)
3308                         goto out_remove_binding;
3309
3310                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3311                 if (ret)
3312                         goto out_remove_binding;
3313
3314         }
3315
3316         /* Handle binding during CSA */
3317         if (vif->type == NL80211_IFTYPE_AP) {
3318                 iwl_mvm_update_quotas(mvm, false, NULL);
3319                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3320         }
3321
3322         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3323                 u32 duration = 2 * vif->bss_conf.beacon_int;
3324
3325                 /* iwl_mvm_protect_session() reads directly from the
3326                  * device (the system time), so make sure it is
3327                  * available.
3328                  */
3329                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3330                 if (ret)
3331                         goto out_remove_binding;
3332
3333                 /* Protect the session to make sure we hear the first
3334                  * beacon on the new channel.
3335                  */
3336                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3337                                         vif->bss_conf.beacon_int / 2,
3338                                         true);
3339
3340                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3341
3342                 iwl_mvm_update_quotas(mvm, false, NULL);
3343         }
3344
3345         goto out;
3346
3347 out_remove_binding:
3348         iwl_mvm_binding_remove_vif(mvm, vif);
3349         iwl_mvm_power_update_mac(mvm);
3350 out:
3351         if (ret)
3352                 mvmvif->phy_ctxt = NULL;
3353         return ret;
3354 }
3355 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3356                                       struct ieee80211_vif *vif,
3357                                       struct ieee80211_chanctx_conf *ctx)
3358 {
3359         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3360         int ret;
3361
3362         mutex_lock(&mvm->mutex);
3363         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3364         mutex_unlock(&mvm->mutex);
3365
3366         return ret;
3367 }
3368
3369 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3370                                            struct ieee80211_vif *vif,
3371                                            struct ieee80211_chanctx_conf *ctx,
3372                                            bool switching_chanctx)
3373 {
3374         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3375         struct ieee80211_vif *disabled_vif = NULL;
3376
3377         lockdep_assert_held(&mvm->mutex);
3378
3379         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3380
3381         switch (vif->type) {
3382         case NL80211_IFTYPE_ADHOC:
3383                 goto out;
3384         case NL80211_IFTYPE_MONITOR:
3385                 mvmvif->monitor_active = false;
3386                 mvmvif->ps_disabled = false;
3387                 iwl_mvm_rm_snif_sta(mvm, vif);
3388                 break;
3389         case NL80211_IFTYPE_AP:
3390                 /* This part is triggered only during CSA */
3391                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3392                         goto out;
3393
3394                 mvmvif->csa_countdown = false;
3395
3396                 /* Set CS bit on all the stations */
3397                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3398
3399                 /* Save blocked iface, the timeout is set on the next beacon */
3400                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3401
3402                 mvmvif->ap_ibss_active = false;
3403                 break;
3404         case NL80211_IFTYPE_STATION:
3405                 if (!switching_chanctx)
3406                         break;
3407
3408                 disabled_vif = vif;
3409
3410                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3411                 break;
3412         default:
3413                 break;
3414         }
3415
3416         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3417         iwl_mvm_binding_remove_vif(mvm, vif);
3418
3419 out:
3420         mvmvif->phy_ctxt = NULL;
3421         iwl_mvm_power_update_mac(mvm);
3422 }
3423
3424 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3425                                          struct ieee80211_vif *vif,
3426                                          struct ieee80211_chanctx_conf *ctx)
3427 {
3428         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3429
3430         mutex_lock(&mvm->mutex);
3431         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3432         mutex_unlock(&mvm->mutex);
3433 }
3434
3435 static int
3436 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3437                                 struct ieee80211_vif_chanctx_switch *vifs)
3438 {
3439         int ret;
3440
3441         mutex_lock(&mvm->mutex);
3442         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3443         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3444
3445         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3446         if (ret) {
3447                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3448                 goto out_reassign;
3449         }
3450
3451         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3452                                            true);
3453         if (ret) {
3454                 IWL_ERR(mvm,
3455                         "failed to assign new_ctx during channel switch\n");
3456                 goto out_remove;
3457         }
3458
3459         /* we don't support TDLS during DCM - can be caused by channel switch */
3460         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3461                 iwl_mvm_teardown_tdls_peers(mvm);
3462
3463         goto out;
3464
3465 out_remove:
3466         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3467
3468 out_reassign:
3469         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3470                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3471                 goto out_restart;
3472         }
3473
3474         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3475                                          true)) {
3476                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3477                 goto out_restart;
3478         }
3479
3480         goto out;
3481
3482 out_restart:
3483         /* things keep failing, better restart the hw */
3484         iwl_mvm_nic_restart(mvm, false);
3485
3486 out:
3487         mutex_unlock(&mvm->mutex);
3488
3489         return ret;
3490 }
3491
3492 static int
3493 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3494                                     struct ieee80211_vif_chanctx_switch *vifs)
3495 {
3496         int ret;
3497
3498         mutex_lock(&mvm->mutex);
3499         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3500
3501         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3502                                            true);
3503         if (ret) {
3504                 IWL_ERR(mvm,
3505                         "failed to assign new_ctx during channel switch\n");
3506                 goto out_reassign;
3507         }
3508
3509         goto out;
3510
3511 out_reassign:
3512         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3513                                          true)) {
3514                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3515                 goto out_restart;
3516         }
3517
3518         goto out;
3519
3520 out_restart:
3521         /* things keep failing, better restart the hw */
3522         iwl_mvm_nic_restart(mvm, false);
3523
3524 out:
3525         mutex_unlock(&mvm->mutex);
3526
3527         return ret;
3528 }
3529
3530 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3531                                       struct ieee80211_vif_chanctx_switch *vifs,
3532                                       int n_vifs,
3533                                       enum ieee80211_chanctx_switch_mode mode)
3534 {
3535         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3536         int ret;
3537
3538         /* we only support a single-vif right now */
3539         if (n_vifs > 1)
3540                 return -EOPNOTSUPP;
3541
3542         switch (mode) {
3543         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3544                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3545                 break;
3546         case CHANCTX_SWMODE_REASSIGN_VIF:
3547                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3548                 break;
3549         default:
3550                 ret = -EOPNOTSUPP;
3551                 break;
3552         }
3553
3554         return ret;
3555 }
3556
3557 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3558                            struct ieee80211_sta *sta,
3559                            bool set)
3560 {
3561         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3562         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3563
3564         if (!mvm_sta || !mvm_sta->vif) {
3565                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3566                 return -EINVAL;
3567         }
3568
3569         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3570 }
3571
3572 #ifdef CONFIG_NL80211_TESTMODE
3573 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3574         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3575         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3576         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3577 };
3578
3579 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3580                                       struct ieee80211_vif *vif,
3581                                       void *data, int len)
3582 {
3583         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3584         int err;
3585         u32 noa_duration;
3586
3587         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3588         if (err)
3589                 return err;
3590
3591         if (!tb[IWL_MVM_TM_ATTR_CMD])
3592                 return -EINVAL;
3593
3594         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3595         case IWL_MVM_TM_CMD_SET_NOA:
3596                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3597                     !vif->bss_conf.enable_beacon ||
3598                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3599                         return -EINVAL;
3600
3601                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3602                 if (noa_duration >= vif->bss_conf.beacon_int)
3603                         return -EINVAL;
3604
3605                 mvm->noa_duration = noa_duration;
3606                 mvm->noa_vif = vif;
3607
3608                 return iwl_mvm_update_quotas(mvm, false, NULL);
3609         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3610                 /* must be associated client vif - ignore authorized */
3611                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3612                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3613                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3614                         return -EINVAL;
3615
3616                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3617                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3618                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3619         }
3620
3621         return -EOPNOTSUPP;
3622 }
3623
3624 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3625                                     struct ieee80211_vif *vif,
3626                                     void *data, int len)
3627 {
3628         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3629         int err;
3630
3631         mutex_lock(&mvm->mutex);
3632         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3633         mutex_unlock(&mvm->mutex);
3634
3635         return err;
3636 }
3637 #endif
3638
3639 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3640                                    struct ieee80211_vif *vif,
3641                                    struct ieee80211_channel_switch *chsw)
3642 {
3643         /* By implementing this operation, we prevent mac80211 from
3644          * starting its own channel switch timer, so that we can call
3645          * ieee80211_chswitch_done() ourselves at the right time
3646          * (which is when the absence time event starts).
3647          */
3648
3649         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3650                            "dummy channel switch op\n");
3651 }
3652
3653 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3654                                       struct ieee80211_vif *vif,
3655                                       struct ieee80211_channel_switch *chsw)
3656 {
3657         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3658         struct ieee80211_vif *csa_vif;
3659         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3660         u32 apply_time;
3661         int ret;
3662
3663         mutex_lock(&mvm->mutex);
3664
3665         mvmvif->csa_failed = false;
3666
3667         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3668                            chsw->chandef.center_freq1);
3669
3670         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3671
3672         switch (vif->type) {
3673         case NL80211_IFTYPE_AP:
3674                 csa_vif =
3675                         rcu_dereference_protected(mvm->csa_vif,
3676                                                   lockdep_is_held(&mvm->mutex));
3677                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3678                               "Another CSA is already in progress")) {
3679                         ret = -EBUSY;
3680                         goto out_unlock;
3681                 }
3682
3683                 rcu_assign_pointer(mvm->csa_vif, vif);
3684
3685                 if (WARN_ONCE(mvmvif->csa_countdown,
3686                               "Previous CSA countdown didn't complete")) {
3687                         ret = -EBUSY;
3688                         goto out_unlock;
3689                 }
3690
3691                 break;
3692         case NL80211_IFTYPE_STATION:
3693                 if (mvmvif->lqm_active)
3694                         iwl_mvm_send_lqm_cmd(vif,
3695                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3696                                              0, 0);
3697
3698                 /* Schedule the time event to a bit before beacon 1,
3699                  * to make sure we're in the new channel when the
3700                  * GO/AP arrives.
3701                  */
3702                 apply_time = chsw->device_timestamp +
3703                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3704                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3705
3706                 if (chsw->block_tx)
3707                         iwl_mvm_csa_client_absent(mvm, vif);
3708
3709                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3710                                             apply_time);
3711                 if (mvmvif->bf_data.bf_enabled) {
3712                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3713                         if (ret)
3714                                 goto out_unlock;
3715                 }
3716
3717                 break;
3718         default:
3719                 break;
3720         }
3721
3722         mvmvif->ps_disabled = true;
3723
3724         ret = iwl_mvm_power_update_ps(mvm);
3725         if (ret)
3726                 goto out_unlock;
3727
3728         /* we won't be on this channel any longer */
3729         iwl_mvm_teardown_tdls_peers(mvm);
3730
3731 out_unlock:
3732         mutex_unlock(&mvm->mutex);
3733
3734         return ret;
3735 }
3736
3737 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3738                                        struct ieee80211_vif *vif)
3739 {
3740         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3741         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3742         int ret;
3743
3744         mutex_lock(&mvm->mutex);
3745
3746         if (mvmvif->csa_failed) {
3747                 mvmvif->csa_failed = false;
3748                 ret = -EIO;
3749                 goto out_unlock;
3750         }
3751
3752         if (vif->type == NL80211_IFTYPE_STATION) {
3753                 struct iwl_mvm_sta *mvmsta;
3754
3755                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3756                                                           mvmvif->ap_sta_id);
3757
3758                 if (WARN_ON(!mvmsta)) {
3759                         ret = -EIO;
3760                         goto out_unlock;
3761                 }
3762
3763                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3764
3765                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3766
3767                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3768                 if (ret)
3769                         goto out_unlock;
3770
3771                 iwl_mvm_stop_session_protection(mvm, vif);
3772         }
3773
3774         mvmvif->ps_disabled = false;
3775
3776         ret = iwl_mvm_power_update_ps(mvm);
3777
3778 out_unlock:
3779         mutex_unlock(&mvm->mutex);
3780
3781         return ret;
3782 }
3783
3784 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3785                               struct ieee80211_vif *vif, u32 queues, bool drop)
3786 {
3787         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3788         struct iwl_mvm_vif *mvmvif;
3789         struct iwl_mvm_sta *mvmsta;
3790         struct ieee80211_sta *sta;
3791         int i;
3792         u32 msk = 0;
3793
3794         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3795                 return;
3796
3797         /* Make sure we're done with the deferred traffic before flushing */
3798         if (iwl_mvm_is_dqa_supported(mvm))
3799                 flush_work(&mvm->add_stream_wk);
3800
3801         mutex_lock(&mvm->mutex);
3802         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3803
3804         /* flush the AP-station and all TDLS peers */
3805         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3806                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3807                                                 lockdep_is_held(&mvm->mutex));
3808                 if (IS_ERR_OR_NULL(sta))
3809                         continue;
3810
3811                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3812                 if (mvmsta->vif != vif)
3813                         continue;
3814
3815                 /* make sure only TDLS peers or the AP are flushed */
3816                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3817
3818                 msk |= mvmsta->tfd_queue_msk;
3819         }
3820
3821         if (drop) {
3822                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3823                         IWL_ERR(mvm, "flush request fail\n");
3824                 mutex_unlock(&mvm->mutex);
3825         } else {
3826                 mutex_unlock(&mvm->mutex);
3827
3828                 /* this can take a while, and we may need/want other operations
3829                  * to succeed while doing this, so do it without the mutex held
3830                  */
3831                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3832         }
3833 }
3834
3835 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3836                                   struct survey_info *survey)
3837 {
3838         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3839         int ret;
3840
3841         memset(survey, 0, sizeof(*survey));
3842
3843         /* only support global statistics right now */
3844         if (idx != 0)
3845                 return -ENOENT;
3846
3847         if (fw_has_capa(&mvm->fw->ucode_capa,
3848                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3849                 return -ENOENT;
3850
3851         mutex_lock(&mvm->mutex);
3852
3853         if (mvm->ucode_loaded) {
3854                 ret = iwl_mvm_request_statistics(mvm, false);
3855                 if (ret)
3856                         goto out;
3857         }
3858
3859         survey->filled = SURVEY_INFO_TIME |
3860                          SURVEY_INFO_TIME_RX |
3861                          SURVEY_INFO_TIME_TX |
3862                          SURVEY_INFO_TIME_SCAN;
3863         survey->time = mvm->accu_radio_stats.on_time_rf +
3864                        mvm->radio_stats.on_time_rf;
3865         do_div(survey->time, USEC_PER_MSEC);
3866
3867         survey->time_rx = mvm->accu_radio_stats.rx_time +
3868                           mvm->radio_stats.rx_time;
3869         do_div(survey->time_rx, USEC_PER_MSEC);
3870
3871         survey->time_tx = mvm->accu_radio_stats.tx_time +
3872                           mvm->radio_stats.tx_time;
3873         do_div(survey->time_tx, USEC_PER_MSEC);
3874
3875         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3876                             mvm->radio_stats.on_time_scan;
3877         do_div(survey->time_scan, USEC_PER_MSEC);
3878
3879         ret = 0;
3880  out:
3881         mutex_unlock(&mvm->mutex);
3882         return ret;
3883 }
3884
3885 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3886                                        struct ieee80211_vif *vif,
3887                                        struct ieee80211_sta *sta,
3888                                        struct station_info *sinfo)
3889 {
3890         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3891         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3892         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3893
3894         if (fw_has_capa(&mvm->fw->ucode_capa,
3895                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3896                 return;
3897
3898         /* if beacon filtering isn't on mac80211 does it anyway */
3899         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3900                 return;
3901
3902         if (!vif->bss_conf.assoc)
3903                 return;
3904
3905         mutex_lock(&mvm->mutex);
3906
3907         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3908                 goto unlock;
3909
3910         if (iwl_mvm_request_statistics(mvm, false))
3911                 goto unlock;
3912
3913         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3914                            mvmvif->beacon_stats.accu_num_beacons;
3915         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3916         if (mvmvif->beacon_stats.avg_signal) {
3917                 /* firmware only reports a value after RXing a few beacons */
3918                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3919                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3920         }
3921  unlock:
3922         mutex_unlock(&mvm->mutex);
3923 }
3924
3925 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
3926                                         struct ieee80211_vif *vif,
3927                                         const struct ieee80211_event *event)
3928 {
3929 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3930         do {                                                    \
3931                 if ((_cnt) && --(_cnt))                         \
3932                         break;                                  \
3933                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3934         } while (0)
3935
3936         struct iwl_fw_dbg_trigger_tlv *trig;
3937         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3938
3939         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3940                 return;
3941
3942         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3943         trig_mlme = (void *)trig->data;
3944         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3945                 return;
3946
3947         if (event->u.mlme.data == ASSOC_EVENT) {
3948                 if (event->u.mlme.status == MLME_DENIED)
3949                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3950                                            trig_mlme->stop_assoc_denied,
3951                                            "DENIED ASSOC: reason %d",
3952                                             event->u.mlme.reason);
3953                 else if (event->u.mlme.status == MLME_TIMEOUT)
3954                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3955                                            trig_mlme->stop_assoc_timeout,
3956                                            "ASSOC TIMEOUT");
3957         } else if (event->u.mlme.data == AUTH_EVENT) {
3958                 if (event->u.mlme.status == MLME_DENIED)
3959                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3960                                            trig_mlme->stop_auth_denied,
3961                                            "DENIED AUTH: reason %d",
3962                                            event->u.mlme.reason);
3963                 else if (event->u.mlme.status == MLME_TIMEOUT)
3964                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3965                                            trig_mlme->stop_auth_timeout,
3966                                            "AUTH TIMEOUT");
3967         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
3968                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3969                                    trig_mlme->stop_rx_deauth,
3970                                    "DEAUTH RX %d", event->u.mlme.reason);
3971         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
3972                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3973                                    trig_mlme->stop_tx_deauth,
3974                                    "DEAUTH TX %d", event->u.mlme.reason);
3975         }
3976 #undef CHECK_MLME_TRIGGER
3977 }
3978
3979 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
3980                                           struct ieee80211_vif *vif,
3981                                           const struct ieee80211_event *event)
3982 {
3983         struct iwl_fw_dbg_trigger_tlv *trig;
3984         struct iwl_fw_dbg_trigger_ba *ba_trig;
3985
3986         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
3987                 return;
3988
3989         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
3990         ba_trig = (void *)trig->data;
3991         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3992                 return;
3993
3994         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
3995                 return;
3996
3997         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
3998                                     "BAR received from %pM, tid %d, ssn %d",
3999                                     event->u.ba.sta->addr, event->u.ba.tid,
4000                                     event->u.ba.ssn);
4001 }
4002
4003 static void
4004 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4005                                      struct ieee80211_vif *vif,
4006                                      const struct ieee80211_event *event)
4007 {
4008         struct iwl_fw_dbg_trigger_tlv *trig;
4009         struct iwl_fw_dbg_trigger_ba *ba_trig;
4010
4011         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4012                 return;
4013
4014         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4015         ba_trig = (void *)trig->data;
4016         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4017                 return;
4018
4019         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4020                 return;
4021
4022         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4023                                     "Frame from %pM timed out, tid %d",
4024                                     event->u.ba.sta->addr, event->u.ba.tid);
4025 }
4026
4027 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4028                                        struct ieee80211_vif *vif,
4029                                        const struct ieee80211_event *event)
4030 {
4031         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4032
4033         switch (event->type) {
4034         case MLME_EVENT:
4035                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4036                 break;
4037         case BAR_RX_EVENT:
4038                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4039                 break;
4040         case BA_FRAME_TIMEOUT:
4041                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4042                 break;
4043         default:
4044                 break;
4045         }
4046 }
4047
4048 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4049                                      struct iwl_mvm_internal_rxq_notif *notif,
4050                                      u32 size)
4051 {
4052         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(notif_waitq);
4053         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4054         int ret;
4055
4056         lockdep_assert_held(&mvm->mutex);
4057
4058         if (!iwl_mvm_has_new_rx_api(mvm))
4059                 return;
4060
4061         notif->cookie = mvm->queue_sync_cookie;
4062
4063         if (notif->sync)
4064                 atomic_set(&mvm->queue_sync_counter,
4065                            mvm->trans->num_rx_queues);
4066
4067         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4068         if (ret) {
4069                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4070                 goto out;
4071         }
4072
4073         if (notif->sync)
4074                 ret = wait_event_timeout(notif_waitq,
4075                                          atomic_read(&mvm->queue_sync_counter) == 0,
4076                                          HZ);
4077         WARN_ON_ONCE(!ret);
4078
4079 out:
4080         atomic_set(&mvm->queue_sync_counter, 0);
4081         mvm->queue_sync_cookie++;
4082 }
4083
4084 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4085 {
4086         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4087         struct iwl_mvm_internal_rxq_notif data = {
4088                 .type = IWL_MVM_RXQ_EMPTY,
4089                 .sync = 1,
4090         };
4091
4092         mutex_lock(&mvm->mutex);
4093         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4094         mutex_unlock(&mvm->mutex);
4095 }
4096
4097 const struct ieee80211_ops iwl_mvm_hw_ops = {
4098         .tx = iwl_mvm_mac_tx,
4099         .ampdu_action = iwl_mvm_mac_ampdu_action,
4100         .start = iwl_mvm_mac_start,
4101         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4102         .stop = iwl_mvm_mac_stop,
4103         .add_interface = iwl_mvm_mac_add_interface,
4104         .remove_interface = iwl_mvm_mac_remove_interface,
4105         .config = iwl_mvm_mac_config,
4106         .prepare_multicast = iwl_mvm_prepare_multicast,
4107         .configure_filter = iwl_mvm_configure_filter,
4108         .config_iface_filter = iwl_mvm_config_iface_filter,
4109         .bss_info_changed = iwl_mvm_bss_info_changed,
4110         .hw_scan = iwl_mvm_mac_hw_scan,
4111         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4112         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4113         .sta_state = iwl_mvm_mac_sta_state,
4114         .sta_notify = iwl_mvm_mac_sta_notify,
4115         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4116         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4117         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4118         .sta_rc_update = iwl_mvm_sta_rc_update,
4119         .conf_tx = iwl_mvm_mac_conf_tx,
4120         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4121         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4122         .flush = iwl_mvm_mac_flush,
4123         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4124         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4125         .set_key = iwl_mvm_mac_set_key,
4126         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4127         .remain_on_channel = iwl_mvm_roc,
4128         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4129         .add_chanctx = iwl_mvm_add_chanctx,
4130         .remove_chanctx = iwl_mvm_remove_chanctx,
4131         .change_chanctx = iwl_mvm_change_chanctx,
4132         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4133         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4134         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4135
4136         .start_ap = iwl_mvm_start_ap_ibss,
4137         .stop_ap = iwl_mvm_stop_ap_ibss,
4138         .join_ibss = iwl_mvm_start_ap_ibss,
4139         .leave_ibss = iwl_mvm_stop_ap_ibss,
4140
4141         .set_tim = iwl_mvm_set_tim,
4142
4143         .channel_switch = iwl_mvm_channel_switch,
4144         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4145         .post_channel_switch = iwl_mvm_post_channel_switch,
4146
4147         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4148         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4149         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4150
4151         .event_callback = iwl_mvm_mac_event_callback,
4152
4153         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4154
4155         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4156
4157 #ifdef CONFIG_PM_SLEEP
4158         /* look at d3.c */
4159         .suspend = iwl_mvm_suspend,
4160         .resume = iwl_mvm_resume,
4161         .set_wakeup = iwl_mvm_set_wakeup,
4162         .set_rekey_data = iwl_mvm_set_rekey_data,
4163 #if IS_ENABLED(CONFIG_IPV6)
4164         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4165 #endif
4166         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4167 #endif
4168         .get_survey = iwl_mvm_mac_get_survey,
4169         .sta_statistics = iwl_mvm_mac_sta_statistics,
4170 };