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.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  37  * All rights reserved.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  *
  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
  59  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  60  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  61  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  62  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  63  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  64  *
  65  *****************************************************************************/
  66 #include <linux/kernel.h>
  67 #include <linux/slab.h>
  68 #include <linux/skbuff.h>
  69 #include <linux/netdevice.h>
  70 #include <linux/etherdevice.h>
  71 #include <linux/ip.h>
  72 #include <linux/if_arp.h>
  73 #include <linux/time.h>
  74 #include <net/mac80211.h>
  75 #include <net/ieee80211_radiotap.h>
  76 #include <net/tcp.h>
  77
  78 #include "iwl-op-mode.h"
  79 #include "iwl-io.h"
  80 #include "mvm.h"
  81 #include "sta.h"
  82 #include "time-event.h"
  83 #include "iwl-eeprom-parse.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88 #include "iwl-nvm-parse.h"
  89 #include "fw-dbg.h"
  90
  91 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  92         {
  93                 .max = 1,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_AP) |
  99                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 100                         BIT(NL80211_IFTYPE_P2P_GO),
 101         },
 102         {
 103                 .max = 1,
 104                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 105         },
 106 };
 107
 108 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 109         {
 110                 .num_different_channels = 2,
 111                 .max_interfaces = 3,
 112                 .limits = iwl_mvm_limits,
 113                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 114         },
 115 };
 116
 117 #ifdef CONFIG_PM_SLEEP
 118 static const struct nl80211_wowlan_tcp_data_token_feature
 119 iwl_mvm_wowlan_tcp_token_feature = {
 120         .min_len = 0,
 121         .max_len = 255,
 122         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 123 };
 124
 125 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 126         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 127         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 128                             sizeof(struct ethhdr) -
 129                             sizeof(struct iphdr) -
 130                             sizeof(struct tcphdr),
 131         .data_interval_max = 65535, /* __le16 in API */
 132         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 133                             sizeof(struct ethhdr) -
 134                             sizeof(struct iphdr) -
 135                             sizeof(struct tcphdr),
 136         .seq = true,
 137 };
 138 #endif
 139
 140 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 141 /*
 142  * Use the reserved field to indicate magic values.
 143  * these values will only be used internally by the driver,
 144  * and won't make it to the fw (reserved will be 0).
 145  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 146  *      be the vif's ip address. in case there is not a single
 147  *      ip address (0, or more than 1), this attribute will
 148  *      be skipped.
 149  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 150  *      the LSB bytes of the vif's mac address
 151  */
 152 enum {
 153         BC_FILTER_MAGIC_NONE = 0,
 154         BC_FILTER_MAGIC_IP,
 155         BC_FILTER_MAGIC_MAC,
 156 };
 157
 158 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 159         {
 160                 /* arp */
 161                 .discard = 0,
 162                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 163                 .attrs = {
 164                         {
 165                                 /* frame type - arp, hw type - ethernet */
 166                                 .offset_type =
 167                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 168                                 .offset = sizeof(rfc1042_header),
 169                                 .val = cpu_to_be32(0x08060001),
 170                                 .mask = cpu_to_be32(0xffffffff),
 171                         },
 172                         {
 173                                 /* arp dest ip */
 174                                 .offset_type =
 175                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 176                                 .offset = sizeof(rfc1042_header) + 2 +
 177                                           sizeof(struct arphdr) +
 178                                           ETH_ALEN + sizeof(__be32) +
 179                                           ETH_ALEN,
 180                                 .mask = cpu_to_be32(0xffffffff),
 181                                 /* mark it as special field */
 182                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 183                         },
 184                 },
 185         },
 186         {
 187                 /* dhcp offer bcast */
 188                 .discard = 0,
 189                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 190                 .attrs = {
 191                         {
 192                                 /* udp dest port - 68 (bootp client)*/
 193                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 194                                 .offset = offsetof(struct udphdr, dest),
 195                                 .val = cpu_to_be32(0x00440000),
 196                                 .mask = cpu_to_be32(0xffff0000),
 197                         },
 198                         {
 199                                 /* dhcp - lsb bytes of client hw address */
 200                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 201                                 .offset = 38,
 202                                 .mask = cpu_to_be32(0xffffffff),
 203                                 /* mark it as special field */
 204                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 205                         },
 206                 },
 207         },
 208         /* last filter must be empty */
 209         {},
 210 };
 211 #endif
 212
 213 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 214 {
 215         if (!iwl_mvm_is_d0i3_supported(mvm))
 216                 return;
 217
 218         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 219         spin_lock_bh(&mvm->refs_lock);
 220         mvm->refs[ref_type]++;
 221         spin_unlock_bh(&mvm->refs_lock);
 222         iwl_trans_ref(mvm->trans);
 223 }
 224
 225 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 226 {
 227         if (!iwl_mvm_is_d0i3_supported(mvm))
 228                 return;
 229
 230         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 231         spin_lock_bh(&mvm->refs_lock);
 232         WARN_ON(!mvm->refs[ref_type]--);
 233         spin_unlock_bh(&mvm->refs_lock);
 234         iwl_trans_unref(mvm->trans);
 235 }
 236
 237 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 238                                      enum iwl_mvm_ref_type except_ref)
 239 {
 240         int i, j;
 241
 242         if (!iwl_mvm_is_d0i3_supported(mvm))
 243                 return;
 244
 245         spin_lock_bh(&mvm->refs_lock);
 246         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 247                 if (except_ref == i || !mvm->refs[i])
 248                         continue;
 249
 250                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 251                               i, mvm->refs[i]);
 252                 for (j = 0; j < mvm->refs[i]; j++)
 253                         iwl_trans_unref(mvm->trans);
 254                 mvm->refs[i] = 0;
 255         }
 256         spin_unlock_bh(&mvm->refs_lock);
 257 }
 258
 259 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 260 {
 261         int i;
 262         bool taken = false;
 263
 264         if (!iwl_mvm_is_d0i3_supported(mvm))
 265                 return true;
 266
 267         spin_lock_bh(&mvm->refs_lock);
 268         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 269                 if (mvm->refs[i]) {
 270                         taken = true;
 271                         break;
 272                 }
 273         }
 274         spin_unlock_bh(&mvm->refs_lock);
 275
 276         return taken;
 277 }
 278
 279 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 280 {
 281         iwl_mvm_ref(mvm, ref_type);
 282
 283         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 284                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 285                                 HZ)) {
 286                 WARN_ON_ONCE(1);
 287                 iwl_mvm_unref(mvm, ref_type);
 288                 return -EIO;
 289         }
 290
 291         return 0;
 292 }
 293
 294 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 295 {
 296         int i;
 297
 298         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 299         for (i = 0; i < NUM_PHY_CTX; i++) {
 300                 mvm->phy_ctxts[i].id = i;
 301                 mvm->phy_ctxts[i].ref = 0;
 302         }
 303 }
 304
 305 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 306                                                   const char *alpha2,
 307                                                   enum iwl_mcc_source src_id,
 308                                                   bool *changed)
 309 {
 310         struct ieee80211_regdomain *regd = NULL;
 311         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 312         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 313         struct iwl_mcc_update_resp *resp;
 314
 315         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 316
 317         lockdep_assert_held(&mvm->mutex);
 318
 319         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 320         if (IS_ERR_OR_NULL(resp)) {
 321                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 322                               PTR_ERR_OR_ZERO(resp));
 323                 goto out;
 324         }
 325
 326         if (changed)
 327                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 328
 329         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 330                                       __le32_to_cpu(resp->n_channels),
 331                                       resp->channels,
 332                                       __le16_to_cpu(resp->mcc));
 333         /* Store the return source id */
 334         src_id = resp->source_id;
 335         kfree(resp);
 336         if (IS_ERR_OR_NULL(regd)) {
 337                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 338                               PTR_ERR_OR_ZERO(regd));
 339                 goto out;
 340         }
 341
 342         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 343                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 344         mvm->lar_regdom_set = true;
 345         mvm->mcc_src = src_id;
 346
 347 out:
 348         return regd;
 349 }
 350
 351 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 352 {
 353         bool changed;
 354         struct ieee80211_regdomain *regd;
 355
 356         if (!iwl_mvm_is_lar_supported(mvm))
 357                 return;
 358
 359         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 360         if (!IS_ERR_OR_NULL(regd)) {
 361                 /* only update the regulatory core if changed */
 362                 if (changed)
 363                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 364
 365                 kfree(regd);
 366         }
 367 }
 368
 369 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 370                                                           bool *changed)
 371 {
 372         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 373                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 374                                      MCC_SOURCE_GET_CURRENT :
 375                                      MCC_SOURCE_OLD_FW, changed);
 376 }
 377
 378 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 379 {
 380         enum iwl_mcc_source used_src;
 381         struct ieee80211_regdomain *regd;
 382         int ret;
 383         bool changed;
 384         const struct ieee80211_regdomain *r =
 385                         rtnl_dereference(mvm->hw->wiphy->regd);
 386
 387         if (!r)
 388                 return -ENOENT;
 389
 390         /* save the last source in case we overwrite it below */
 391         used_src = mvm->mcc_src;
 392         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 393                 /* Notify the firmware we support wifi location updates */
 394                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 395                 if (!IS_ERR_OR_NULL(regd))
 396                         kfree(regd);
 397         }
 398
 399         /* Now set our last stored MCC and source */
 400         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 401                                      &changed);
 402         if (IS_ERR_OR_NULL(regd))
 403                 return -EIO;
 404
 405         /* update cfg80211 if the regdomain was changed */
 406         if (changed)
 407                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 408         else
 409                 ret = 0;
 410
 411         kfree(regd);
 412         return ret;
 413 }
 414
 415 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 416 {
 417         struct ieee80211_hw *hw = mvm->hw;
 418         int num_mac, ret, i;
 419         static const u32 mvm_ciphers[] = {
 420                 WLAN_CIPHER_SUITE_WEP40,
 421                 WLAN_CIPHER_SUITE_WEP104,
 422                 WLAN_CIPHER_SUITE_TKIP,
 423                 WLAN_CIPHER_SUITE_CCMP,
 424         };
 425
 426         /* Tell mac80211 our characteristics */
 427         ieee80211_hw_set(hw, SIGNAL_DBM);
 428         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 429         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 430         ieee80211_hw_set(hw, QUEUE_CONTROL);
 431         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 432         ieee80211_hw_set(hw, SUPPORTS_PS);
 433         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 434         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 435         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 436         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 437         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 438         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 439         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 440         ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 441         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
 442
 443         if (mvm->trans->max_skb_frags)
 444                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 445
 446         hw->queues = mvm->first_agg_queue;
 447         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 448         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 449                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 450         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 451                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 452         hw->rate_control_algorithm = "iwl-mvm-rs";
 453         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 454         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 455
 456         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
 457         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 458         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 459         hw->wiphy->cipher_suites = mvm->ciphers;
 460
 461         /*
 462          * Enable 11w if advertised by firmware and software crypto
 463          * is not enabled (as the firmware will interpret some mgmt
 464          * packets, so enabling it with software crypto isn't safe)
 465          */
 466         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 467             !iwlwifi_mod_params.sw_crypto) {
 468                 ieee80211_hw_set(hw, MFP_CAPABLE);
 469                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 470                         WLAN_CIPHER_SUITE_AES_CMAC;
 471                 hw->wiphy->n_cipher_suites++;
 472         }
 473
 474         /* currently FW API supports only one optional cipher scheme */
 475         if (mvm->fw->cs[0].cipher) {
 476                 mvm->hw->n_cipher_schemes = 1;
 477                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 478                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 479                         mvm->fw->cs[0].cipher;
 480                 hw->wiphy->n_cipher_suites++;
 481         }
 482
 483         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 484         hw->wiphy->features |=
 485                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 486                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 487                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 488
 489         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 490         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 491         hw->chanctx_data_size = sizeof(u16);
 492
 493         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 494                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 495                 BIT(NL80211_IFTYPE_AP) |
 496                 BIT(NL80211_IFTYPE_P2P_GO) |
 497                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 498                 BIT(NL80211_IFTYPE_ADHOC);
 499
 500         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 501         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 502         if (iwl_mvm_is_lar_supported(mvm))
 503                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 504         else
 505                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 506                                                REGULATORY_DISABLE_BEACON_HINTS;
 507
 508         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 509                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 510
 511         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 512
 513         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 514         hw->wiphy->n_iface_combinations =
 515                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 516
 517         hw->wiphy->max_remain_on_channel_duration = 10000;
 518         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 519         /* we can compensate an offset of up to 3 channels = 15 MHz */
 520         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 521
 522         /* Extract MAC address */
 523         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 524         hw->wiphy->addresses = mvm->addresses;
 525         hw->wiphy->n_addresses = 1;
 526
 527         /* Extract additional MAC addresses if available */
 528         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 529                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 530
 531         for (i = 1; i < num_mac; i++) {
 532                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 533                        ETH_ALEN);
 534                 mvm->addresses[i].addr[5]++;
 535                 hw->wiphy->n_addresses++;
 536         }
 537
 538         iwl_mvm_reset_phy_ctxts(mvm);
 539
 540         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 541
 542         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 543
 544         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 545         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 546                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 547
 548         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 549                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 550         else
 551                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 552
 553         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 554                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 555                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 556         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 557                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 558                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 559
 560                 if (fw_has_capa(&mvm->fw->ucode_capa,
 561                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 562                     fw_has_api(&mvm->fw->ucode_capa,
 563                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 564                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 565                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 566         }
 567
 568         hw->wiphy->hw_version = mvm->trans->hw_id;
 569
 570         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 571                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 572         else
 573                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 574
 575         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 576         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 577         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 578         /* we create the 802.11 header and zero length SSID IE. */
 579         hw->wiphy->max_sched_scan_ie_len =
 580                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 581         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 582         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 583
 584         /*
 585          * the firmware uses u8 for num of iterations, but 0xff is saved for
 586          * infinite loop, so the maximum number of iterations is actually 254.
 587          */
 588         hw->wiphy->max_sched_scan_plan_iterations = 254;
 589
 590         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 591                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 592                                NL80211_FEATURE_P2P_GO_OPPPS |
 593                                NL80211_FEATURE_DYNAMIC_SMPS |
 594                                NL80211_FEATURE_STATIC_SMPS |
 595                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 596
 597         if (fw_has_capa(&mvm->fw->ucode_capa,
 598                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 599                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 600         if (fw_has_capa(&mvm->fw->ucode_capa,
 601                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 602                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 603
 604         if (fw_has_capa(&mvm->fw->ucode_capa,
 605                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 606                 hw->wiphy->features |=
 607                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 608
 609         if (fw_has_capa(&mvm->fw->ucode_capa,
 610                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 611                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 612
 613         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 614
 615 #ifdef CONFIG_PM_SLEEP
 616         if (iwl_mvm_is_d0i3_supported(mvm) &&
 617             device_can_wakeup(mvm->trans->dev)) {
 618                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 619                 hw->wiphy->wowlan = &mvm->wowlan;
 620         }
 621
 622         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 623             mvm->trans->ops->d3_suspend &&
 624             mvm->trans->ops->d3_resume &&
 625             device_can_wakeup(mvm->trans->dev)) {
 626                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 627                                      WIPHY_WOWLAN_DISCONNECT |
 628                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 629                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 630                                      WIPHY_WOWLAN_NET_DETECT;
 631                 if (!iwlwifi_mod_params.sw_crypto)
 632                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 633                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 634                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 635
 636                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 637                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 638                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 639                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 640                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 641                 hw->wiphy->wowlan = &mvm->wowlan;
 642         }
 643 #endif
 644
 645 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 646         /* assign default bcast filtering configuration */
 647         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 648 #endif
 649
 650         ret = iwl_mvm_leds_init(mvm);
 651         if (ret)
 652                 return ret;
 653
 654         if (fw_has_capa(&mvm->fw->ucode_capa,
 655                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 656                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 657                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 658                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 659         }
 660
 661         if (fw_has_capa(&mvm->fw->ucode_capa,
 662                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 663                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 664                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 665         }
 666
 667         hw->netdev_features |= mvm->cfg->features;
 668         if (!iwl_mvm_is_csum_supported(mvm)) {
 669                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 670                                          NETIF_F_RXCSUM);
 671                 /* We may support SW TX CSUM */
 672                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 673                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 674         }
 675
 676         ret = ieee80211_register_hw(mvm->hw);
 677         if (ret)
 678                 iwl_mvm_leds_exit(mvm);
 679
 680         return ret;
 681 }
 682
 683 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 684                              struct ieee80211_sta *sta,
 685                              struct sk_buff *skb)
 686 {
 687         struct iwl_mvm_sta *mvmsta;
 688         bool defer = false;
 689
 690         /*
 691          * double check the IN_D0I3 flag both before and after
 692          * taking the spinlock, in order to prevent taking
 693          * the spinlock when not needed.
 694          */
 695         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 696                 return false;
 697
 698         spin_lock(&mvm->d0i3_tx_lock);
 699         /*
 700          * testing the flag again ensures the skb dequeue
 701          * loop (on d0i3 exit) hasn't run yet.
 702          */
 703         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 704                 goto out;
 705
 706         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 707         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 708             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 709                 goto out;
 710
 711         __skb_queue_tail(&mvm->d0i3_tx, skb);
 712         ieee80211_stop_queues(mvm->hw);
 713
 714         /* trigger wakeup */
 715         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 716         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 717
 718         defer = true;
 719 out:
 720         spin_unlock(&mvm->d0i3_tx_lock);
 721         return defer;
 722 }
 723
 724 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 725                            struct ieee80211_tx_control *control,
 726                            struct sk_buff *skb)
 727 {
 728         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 729         struct ieee80211_sta *sta = control->sta;
 730         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 731         struct ieee80211_hdr *hdr = (void *)skb->data;
 732
 733         if (iwl_mvm_is_radio_killed(mvm)) {
 734                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 735                 goto drop;
 736         }
 737
 738         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 739             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 740             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 741                 goto drop;
 742
 743         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 744         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 745                      ieee80211_is_mgmt(hdr->frame_control) &&
 746                      !ieee80211_is_deauth(hdr->frame_control) &&
 747                      !ieee80211_is_disassoc(hdr->frame_control) &&
 748                      !ieee80211_is_action(hdr->frame_control)))
 749                 sta = NULL;
 750
 751         if (sta) {
 752                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 753                         return;
 754                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 755                         goto drop;
 756                 return;
 757         }
 758
 759         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 760                 goto drop;
 761         return;
 762  drop:
 763         ieee80211_free_txskb(hw, skb);
 764 }
 765
 766 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 767 {
 768         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 769                 return false;
 770         return true;
 771 }
 772
 773 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 774 {
 775         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 776                 return false;
 777         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 778                 return true;
 779
 780         /* enabled by default */
 781         return true;
 782 }
 783
 784 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 785         do {                                                    \
 786                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 787                         break;                                  \
 788                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 789         } while (0)
 790
 791 static void
 792 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 793                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 794                             enum ieee80211_ampdu_mlme_action action)
 795 {
 796         struct iwl_fw_dbg_trigger_tlv *trig;
 797         struct iwl_fw_dbg_trigger_ba *ba_trig;
 798
 799         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 800                 return;
 801
 802         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 803         ba_trig = (void *)trig->data;
 804
 805         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 806                 return;
 807
 808         switch (action) {
 809         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 810                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 811                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 812
 813                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 814                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 815                                  sta->addr, tid, tid_data->ssn);
 816                 break;
 817                 }
 818         case IEEE80211_AMPDU_TX_STOP_CONT:
 819                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 820                                  "TX AGG STOP: MAC %pM tid %d\n",
 821                                  sta->addr, tid);
 822                 break;
 823         case IEEE80211_AMPDU_RX_START:
 824                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 825                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 826                                  sta->addr, tid, rx_ba_ssn);
 827                 break;
 828         case IEEE80211_AMPDU_RX_STOP:
 829                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 830                                  "RX AGG STOP: MAC %pM tid %d\n",
 831                                  sta->addr, tid);
 832                 break;
 833         default:
 834                 break;
 835         }
 836 }
 837
 838 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 839                                     struct ieee80211_vif *vif,
 840                                     struct ieee80211_ampdu_params *params)
 841 {
 842         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 843         int ret;
 844         bool tx_agg_ref = false;
 845         struct ieee80211_sta *sta = params->sta;
 846         enum ieee80211_ampdu_mlme_action action = params->action;
 847         u16 tid = params->tid;
 848         u16 *ssn = &params->ssn;
 849         u8 buf_size = params->buf_size;
 850         bool amsdu = params->amsdu;
 851
 852         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 853                      sta->addr, tid, action);
 854
 855         if (!(mvm->nvm_data->sku_cap_11n_enable))
 856                 return -EACCES;
 857
 858         /* return from D0i3 before starting a new Tx aggregation */
 859         switch (action) {
 860         case IEEE80211_AMPDU_TX_START:
 861         case IEEE80211_AMPDU_TX_STOP_CONT:
 862         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 863         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 864         case IEEE80211_AMPDU_TX_OPERATIONAL:
 865                 /*
 866                  * for tx start, wait synchronously until D0i3 exit to
 867                  * get the correct sequence number for the tid.
 868                  * additionally, some other ampdu actions use direct
 869                  * target access, which is not handled automatically
 870                  * by the trans layer (unlike commands), so wait for
 871                  * d0i3 exit in these cases as well.
 872                  */
 873                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 874                 if (ret)
 875                         return ret;
 876
 877                 tx_agg_ref = true;
 878                 break;
 879         default:
 880                 break;
 881         }
 882
 883         mutex_lock(&mvm->mutex);
 884
 885         switch (action) {
 886         case IEEE80211_AMPDU_RX_START:
 887                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 888                         ret = -EINVAL;
 889                         break;
 890                 }
 891                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size);
 892                 break;
 893         case IEEE80211_AMPDU_RX_STOP:
 894                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size);
 895                 break;
 896         case IEEE80211_AMPDU_TX_START:
 897                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 898                         ret = -EINVAL;
 899                         break;
 900                 }
 901                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 902                 break;
 903         case IEEE80211_AMPDU_TX_STOP_CONT:
 904                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 905                 break;
 906         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 907         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 908                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 909                 break;
 910         case IEEE80211_AMPDU_TX_OPERATIONAL:
 911                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 912                                               buf_size, amsdu);
 913                 break;
 914         default:
 915                 WARN_ON_ONCE(1);
 916                 ret = -EINVAL;
 917                 break;
 918         }
 919
 920         if (!ret) {
 921                 u16 rx_ba_ssn = 0;
 922
 923                 if (action == IEEE80211_AMPDU_RX_START)
 924                         rx_ba_ssn = *ssn;
 925
 926                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 927                                             rx_ba_ssn, action);
 928         }
 929         mutex_unlock(&mvm->mutex);
 930
 931         /*
 932          * If the tid is marked as started, we won't use it for offloaded
 933          * traffic on the next D0i3 entry. It's safe to unref.
 934          */
 935         if (tx_agg_ref)
 936                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 937
 938         return ret;
 939 }
 940
 941 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 942                                      struct ieee80211_vif *vif)
 943 {
 944         struct iwl_mvm *mvm = data;
 945         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 946
 947         mvmvif->uploaded = false;
 948         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 949
 950         spin_lock_bh(&mvm->time_event_lock);
 951         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 952         spin_unlock_bh(&mvm->time_event_lock);
 953
 954         mvmvif->phy_ctxt = NULL;
 955         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 956 }
 957
 958 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 959 {
 960         /* clear the D3 reconfig, we only need it to avoid dumping a
 961          * firmware coredump on reconfiguration, we shouldn't do that
 962          * on D3->D0 transition
 963          */
 964         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
 965                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
 966                 iwl_mvm_fw_error_dump(mvm);
 967         }
 968
 969         /* cleanup all stale references (scan, roc), but keep the
 970          * ucode_down ref until reconfig is complete
 971          */
 972         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 973
 974         iwl_mvm_stop_device(mvm);
 975
 976         mvm->scan_status = 0;
 977         mvm->ps_disabled = false;
 978         mvm->calibrating = false;
 979
 980         /* just in case one was running */
 981         iwl_mvm_cleanup_roc_te(mvm);
 982         ieee80211_remain_on_channel_expired(mvm->hw);
 983
 984         /*
 985          * cleanup all interfaces, even inactive ones, as some might have
 986          * gone down during the HW restart
 987          */
 988         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
 989
 990         mvm->p2p_device_vif = NULL;
 991         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 992
 993         iwl_mvm_reset_phy_ctxts(mvm);
 994         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 995         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 996         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
 997         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
 998         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 999         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1000         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1001         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1002         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1003         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1004
1005         ieee80211_wake_queues(mvm->hw);
1006
1007         /* clear any stale d0i3 state */
1008         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1009
1010         mvm->vif_count = 0;
1011         mvm->rx_ba_sessions = 0;
1012         mvm->fw_dbg_conf = FW_DBG_INVALID;
1013
1014         /* keep statistics ticking */
1015         iwl_mvm_accu_radio_stats(mvm);
1016 }
1017
1018 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1019 {
1020         int ret;
1021
1022         lockdep_assert_held(&mvm->mutex);
1023
1024         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1025                 /* Clean up some internal and mac80211 state on restart */
1026                 iwl_mvm_restart_cleanup(mvm);
1027         } else {
1028                 /* Hold the reference to prevent runtime suspend while
1029                  * the start procedure runs.  It's a bit confusing
1030                  * that the UCODE_DOWN reference is taken, but it just
1031                  * means "UCODE is not UP yet". ( TODO: rename this
1032                  * reference).
1033                  */
1034                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1035         }
1036         ret = iwl_mvm_up(mvm);
1037
1038         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1039                 /* Something went wrong - we need to finish some cleanup
1040                  * that normally iwl_mvm_mac_restart_complete() below
1041                  * would do.
1042                  */
1043                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1044                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1045         }
1046
1047         return ret;
1048 }
1049
1050 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1051 {
1052         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1053         int ret;
1054
1055         /* Some hw restart cleanups must not hold the mutex */
1056         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1057                 /*
1058                  * Make sure we are out of d0i3. This is needed
1059                  * to make sure the reference accounting is correct
1060                  * (and there is no stale d0i3_exit_work).
1061                  */
1062                 wait_event_timeout(mvm->d0i3_exit_waitq,
1063                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1064                                              &mvm->status),
1065                                    HZ);
1066         }
1067
1068         mutex_lock(&mvm->mutex);
1069         ret = __iwl_mvm_mac_start(mvm);
1070         mutex_unlock(&mvm->mutex);
1071
1072         return ret;
1073 }
1074
1075 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1076 {
1077         int ret;
1078
1079         mutex_lock(&mvm->mutex);
1080
1081         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1082         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1083         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1084         if (ret)
1085                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1086                         ret);
1087
1088         /* allow transport/FW low power modes */
1089         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1090
1091         /*
1092          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1093          * of packets the FW sent out, so we must reconnect.
1094          */
1095         iwl_mvm_teardown_tdls_peers(mvm);
1096
1097         mutex_unlock(&mvm->mutex);
1098 }
1099
1100 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1101 {
1102         if (iwl_mvm_is_d0i3_supported(mvm) &&
1103             iwl_mvm_enter_d0i3_on_suspend(mvm))
1104                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1105                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1106                                                         &mvm->status),
1107                                               HZ),
1108                           "D0i3 exit on resume timed out\n");
1109 }
1110
1111 static void
1112 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1113                               enum ieee80211_reconfig_type reconfig_type)
1114 {
1115         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1116
1117         switch (reconfig_type) {
1118         case IEEE80211_RECONFIG_TYPE_RESTART:
1119                 iwl_mvm_restart_complete(mvm);
1120                 break;
1121         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1122                 iwl_mvm_resume_complete(mvm);
1123                 break;
1124         }
1125 }
1126
1127 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1128 {
1129         lockdep_assert_held(&mvm->mutex);
1130
1131         /* firmware counters are obviously reset now, but we shouldn't
1132          * partially track so also clear the fw_reset_accu counters.
1133          */
1134         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1135
1136         /* async_handlers_wk is now blocked */
1137
1138         /*
1139          * The work item could be running or queued if the
1140          * ROC time event stops just as we get here.
1141          */
1142         flush_work(&mvm->roc_done_wk);
1143
1144         iwl_mvm_stop_device(mvm);
1145
1146         iwl_mvm_async_handlers_purge(mvm);
1147         /* async_handlers_list is empty and will stay empty: HW is stopped */
1148
1149         /* the fw is stopped, the aux sta is dead: clean up driver state */
1150         iwl_mvm_del_aux_sta(mvm);
1151
1152         /*
1153          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1154          * won't be called in this case).
1155          * But make sure to cleanup interfaces that have gone down before/during
1156          * HW restart was requested.
1157          */
1158         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1159                 ieee80211_iterate_interfaces(mvm->hw, 0,
1160                                              iwl_mvm_cleanup_iterator, mvm);
1161
1162         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1163          * make sure there's nothing left there and warn if any is found.
1164          */
1165         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1166                 int i;
1167
1168                 for (i = 0; i < mvm->max_scans; i++) {
1169                         if (WARN_ONCE(mvm->scan_uid_status[i],
1170                                       "UMAC scan UID %d status was not cleaned\n",
1171                                       i))
1172                                 mvm->scan_uid_status[i] = 0;
1173                 }
1174         }
1175 }
1176
1177 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1178 {
1179         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1180
1181         flush_work(&mvm->d0i3_exit_work);
1182         flush_work(&mvm->async_handlers_wk);
1183         flush_work(&mvm->add_stream_wk);
1184         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1185         iwl_mvm_free_fw_dump_desc(mvm);
1186
1187         mutex_lock(&mvm->mutex);
1188         __iwl_mvm_mac_stop(mvm);
1189         mutex_unlock(&mvm->mutex);
1190
1191         /*
1192          * The worker might have been waiting for the mutex, let it run and
1193          * discover that its list is now empty.
1194          */
1195         cancel_work_sync(&mvm->async_handlers_wk);
1196 }
1197
1198 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1199 {
1200         u16 i;
1201
1202         lockdep_assert_held(&mvm->mutex);
1203
1204         for (i = 0; i < NUM_PHY_CTX; i++)
1205                 if (!mvm->phy_ctxts[i].ref)
1206                         return &mvm->phy_ctxts[i];
1207
1208         IWL_ERR(mvm, "No available PHY context\n");
1209         return NULL;
1210 }
1211
1212 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1213                                 s16 tx_power)
1214 {
1215         struct iwl_dev_tx_power_cmd cmd = {
1216                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1217                 .v2.mac_context_id =
1218                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1219                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1220         };
1221         int len = sizeof(cmd);
1222
1223         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1224                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1225
1226         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1227                 len = sizeof(cmd.v2);
1228
1229         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1230 }
1231
1232 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1233                                      struct ieee80211_vif *vif)
1234 {
1235         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1236         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1237         int ret;
1238
1239         mvmvif->mvm = mvm;
1240
1241         /*
1242          * make sure D0i3 exit is completed, otherwise a target access
1243          * during tx queue configuration could be done when still in
1244          * D0i3 state.
1245          */
1246         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1247         if (ret)
1248                 return ret;
1249
1250         /*
1251          * Not much to do here. The stack will not allow interface
1252          * types or combinations that we didn't advertise, so we
1253          * don't really have to check the types.
1254          */
1255
1256         mutex_lock(&mvm->mutex);
1257
1258         /* make sure that beacon statistics don't go backwards with FW reset */
1259         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1260                 mvmvif->beacon_stats.accu_num_beacons +=
1261                         mvmvif->beacon_stats.num_beacons;
1262
1263         /* Allocate resources for the MAC context, and add it to the fw  */
1264         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1265         if (ret)
1266                 goto out_unlock;
1267
1268         /* Counting number of interfaces is needed for legacy PM */
1269         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1270                 mvm->vif_count++;
1271
1272         /*
1273          * The AP binding flow can be done only after the beacon
1274          * template is configured (which happens only in the mac80211
1275          * start_ap() flow), and adding the broadcast station can happen
1276          * only after the binding.
1277          * In addition, since modifying the MAC before adding a bcast
1278          * station is not allowed by the FW, delay the adding of MAC context to
1279          * the point where we can also add the bcast station.
1280          * In short: there's not much we can do at this point, other than
1281          * allocating resources :)
1282          */
1283         if (vif->type == NL80211_IFTYPE_AP ||
1284             vif->type == NL80211_IFTYPE_ADHOC) {
1285                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1286                 if (ret) {
1287                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1288                         goto out_release;
1289                 }
1290
1291                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1292                 goto out_unlock;
1293         }
1294
1295         mvmvif->features |= hw->netdev_features;
1296
1297         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1298         if (ret)
1299                 goto out_release;
1300
1301         ret = iwl_mvm_power_update_mac(mvm);
1302         if (ret)
1303                 goto out_remove_mac;
1304
1305         /* beacon filtering */
1306         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1307         if (ret)
1308                 goto out_remove_mac;
1309
1310         if (!mvm->bf_allowed_vif &&
1311             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1312                 mvm->bf_allowed_vif = mvmvif;
1313                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1314                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1315         }
1316
1317         /*
1318          * P2P_DEVICE interface does not have a channel context assigned to it,
1319          * so a dedicated PHY context is allocated to it and the corresponding
1320          * MAC context is bound to it at this stage.
1321          */
1322         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1323
1324                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1325                 if (!mvmvif->phy_ctxt) {
1326                         ret = -ENOSPC;
1327                         goto out_free_bf;
1328                 }
1329
1330                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1331                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1332                 if (ret)
1333                         goto out_unref_phy;
1334
1335                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1336                 if (ret)
1337                         goto out_unbind;
1338
1339                 /* Save a pointer to p2p device vif, so it can later be used to
1340                  * update the p2p device MAC when a GO is started/stopped */
1341                 mvm->p2p_device_vif = vif;
1342         }
1343
1344         iwl_mvm_vif_dbgfs_register(mvm, vif);
1345         goto out_unlock;
1346
1347  out_unbind:
1348         iwl_mvm_binding_remove_vif(mvm, vif);
1349  out_unref_phy:
1350         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1351  out_free_bf:
1352         if (mvm->bf_allowed_vif == mvmvif) {
1353                 mvm->bf_allowed_vif = NULL;
1354                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1355                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1356         }
1357  out_remove_mac:
1358         mvmvif->phy_ctxt = NULL;
1359         iwl_mvm_mac_ctxt_remove(mvm, vif);
1360  out_release:
1361         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1362                 mvm->vif_count--;
1363
1364         iwl_mvm_mac_ctxt_release(mvm, vif);
1365  out_unlock:
1366         mutex_unlock(&mvm->mutex);
1367
1368         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1369
1370         return ret;
1371 }
1372
1373 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1374                                         struct ieee80211_vif *vif)
1375 {
1376         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1377
1378         if (tfd_msk) {
1379                 /*
1380                  * mac80211 first removes all the stations of the vif and
1381                  * then removes the vif. When it removes a station it also
1382                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1383                  * of all the stations of this vif are closed, and the queues
1384                  * of these AMPDU sessions are properly closed.
1385                  * We still need to take care of the shared queues of the vif.
1386                  * Flush them here.
1387                  */
1388                 mutex_lock(&mvm->mutex);
1389                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1390                 mutex_unlock(&mvm->mutex);
1391
1392                 /*
1393                  * There are transports that buffer a few frames in the host.
1394                  * For these, the flush above isn't enough since while we were
1395                  * flushing, the transport might have sent more frames to the
1396                  * device. To solve this, wait here until the transport is
1397                  * empty. Technically, this could have replaced the flush
1398                  * above, but flush is much faster than draining. So flush
1399                  * first, and drain to make sure we have no frames in the
1400                  * transport anymore.
1401                  * If a station still had frames on the shared queues, it is
1402                  * already marked as draining, so to complete the draining, we
1403                  * just need to wait until the transport is empty.
1404                  */
1405                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1406         }
1407
1408         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1409                 /*
1410                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1411                  * We assume here that all the packets sent to the OFFCHANNEL
1412                  * queue are sent in ROC session.
1413                  */
1414                 flush_work(&mvm->roc_done_wk);
1415         } else {
1416                 /*
1417                  * By now, all the AC queues are empty. The AGG queues are
1418                  * empty too. We already got all the Tx responses for all the
1419                  * packets in the queues. The drain work can have been
1420                  * triggered. Flush it.
1421                  */
1422                 flush_work(&mvm->sta_drained_wk);
1423         }
1424 }
1425
1426 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1427                                          struct ieee80211_vif *vif)
1428 {
1429         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1430         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1431
1432         iwl_mvm_prepare_mac_removal(mvm, vif);
1433
1434         mutex_lock(&mvm->mutex);
1435
1436         if (mvm->bf_allowed_vif == mvmvif) {
1437                 mvm->bf_allowed_vif = NULL;
1438                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1439                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1440         }
1441
1442         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1443
1444         /*
1445          * For AP/GO interface, the tear down of the resources allocated to the
1446          * interface is be handled as part of the stop_ap flow.
1447          */
1448         if (vif->type == NL80211_IFTYPE_AP ||
1449             vif->type == NL80211_IFTYPE_ADHOC) {
1450 #ifdef CONFIG_NL80211_TESTMODE
1451                 if (vif == mvm->noa_vif) {
1452                         mvm->noa_vif = NULL;
1453                         mvm->noa_duration = 0;
1454                 }
1455 #endif
1456                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1457                 goto out_release;
1458         }
1459
1460         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1461                 mvm->p2p_device_vif = NULL;
1462                 iwl_mvm_rm_bcast_sta(mvm, vif);
1463                 iwl_mvm_binding_remove_vif(mvm, vif);
1464                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1465                 mvmvif->phy_ctxt = NULL;
1466         }
1467
1468         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1469                 mvm->vif_count--;
1470
1471         iwl_mvm_power_update_mac(mvm);
1472         iwl_mvm_mac_ctxt_remove(mvm, vif);
1473
1474 out_release:
1475         iwl_mvm_mac_ctxt_release(mvm, vif);
1476         mutex_unlock(&mvm->mutex);
1477 }
1478
1479 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1480 {
1481         return 0;
1482 }
1483
1484 struct iwl_mvm_mc_iter_data {
1485         struct iwl_mvm *mvm;
1486         int port_id;
1487 };
1488
1489 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1490                                       struct ieee80211_vif *vif)
1491 {
1492         struct iwl_mvm_mc_iter_data *data = _data;
1493         struct iwl_mvm *mvm = data->mvm;
1494         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1495         int ret, len;
1496
1497         /* if we don't have free ports, mcast frames will be dropped */
1498         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1499                 return;
1500
1501         if (vif->type != NL80211_IFTYPE_STATION ||
1502             !vif->bss_conf.assoc)
1503                 return;
1504
1505         cmd->port_id = data->port_id++;
1506         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1507         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1508
1509         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1510         if (ret)
1511                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1512 }
1513
1514 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1515 {
1516         struct iwl_mvm_mc_iter_data iter_data = {
1517                 .mvm = mvm,
1518         };
1519
1520         lockdep_assert_held(&mvm->mutex);
1521
1522         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1523                 return;
1524
1525         ieee80211_iterate_active_interfaces_atomic(
1526                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1527                 iwl_mvm_mc_iface_iterator, &iter_data);
1528 }
1529
1530 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1531                                      struct netdev_hw_addr_list *mc_list)
1532 {
1533         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1534         struct iwl_mcast_filter_cmd *cmd;
1535         struct netdev_hw_addr *addr;
1536         int addr_count;
1537         bool pass_all;
1538         int len;
1539
1540         addr_count = netdev_hw_addr_list_count(mc_list);
1541         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1542                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1543         if (pass_all)
1544                 addr_count = 0;
1545
1546         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1547         cmd = kzalloc(len, GFP_ATOMIC);
1548         if (!cmd)
1549                 return 0;
1550
1551         if (pass_all) {
1552                 cmd->pass_all = 1;
1553                 return (u64)(unsigned long)cmd;
1554         }
1555
1556         netdev_hw_addr_list_for_each(addr, mc_list) {
1557                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1558                                    cmd->count, addr->addr);
1559                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1560                        addr->addr, ETH_ALEN);
1561                 cmd->count++;
1562         }
1563
1564         return (u64)(unsigned long)cmd;
1565 }
1566
1567 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1568                                      unsigned int changed_flags,
1569                                      unsigned int *total_flags,
1570                                      u64 multicast)
1571 {
1572         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1573         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1574
1575         mutex_lock(&mvm->mutex);
1576
1577         /* replace previous configuration */
1578         kfree(mvm->mcast_filter_cmd);
1579         mvm->mcast_filter_cmd = cmd;
1580
1581         if (!cmd)
1582                 goto out;
1583
1584         iwl_mvm_recalc_multicast(mvm);
1585 out:
1586         mutex_unlock(&mvm->mutex);
1587         *total_flags = 0;
1588 }
1589
1590 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1591                                         struct ieee80211_vif *vif,
1592                                         unsigned int filter_flags,
1593                                         unsigned int changed_flags)
1594 {
1595         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1596
1597         /* We support only filter for probe requests */
1598         if (!(changed_flags & FIF_PROBE_REQ))
1599                 return;
1600
1601         /* Supported only for p2p client interfaces */
1602         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1603             !vif->p2p)
1604                 return;
1605
1606         mutex_lock(&mvm->mutex);
1607         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1608         mutex_unlock(&mvm->mutex);
1609 }
1610
1611 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1612 struct iwl_bcast_iter_data {
1613         struct iwl_mvm *mvm;
1614         struct iwl_bcast_filter_cmd *cmd;
1615         u8 current_filter;
1616 };
1617
1618 static void
1619 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1620                          const struct iwl_fw_bcast_filter *in_filter,
1621                          struct iwl_fw_bcast_filter *out_filter)
1622 {
1623         struct iwl_fw_bcast_filter_attr *attr;
1624         int i;
1625
1626         memcpy(out_filter, in_filter, sizeof(*out_filter));
1627
1628         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1629                 attr = &out_filter->attrs[i];
1630
1631                 if (!attr->mask)
1632                         break;
1633
1634                 switch (attr->reserved1) {
1635                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1636                         if (vif->bss_conf.arp_addr_cnt != 1) {
1637                                 attr->mask = 0;
1638                                 continue;
1639                         }
1640
1641                         attr->val = vif->bss_conf.arp_addr_list[0];
1642                         break;
1643                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1644                         attr->val = *(__be32 *)&vif->addr[2];
1645                         break;
1646                 default:
1647                         break;
1648                 }
1649                 attr->reserved1 = 0;
1650                 out_filter->num_attrs++;
1651         }
1652 }
1653
1654 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1655                                           struct ieee80211_vif *vif)
1656 {
1657         struct iwl_bcast_iter_data *data = _data;
1658         struct iwl_mvm *mvm = data->mvm;
1659         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1660         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1661         struct iwl_fw_bcast_mac *bcast_mac;
1662         int i;
1663
1664         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1665                 return;
1666
1667         bcast_mac = &cmd->macs[mvmvif->id];
1668
1669         /*
1670          * enable filtering only for associated stations, but not for P2P
1671          * Clients
1672          */
1673         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1674             !vif->bss_conf.assoc)
1675                 return;
1676
1677         bcast_mac->default_discard = 1;
1678
1679         /* copy all configured filters */
1680         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1681                 /*
1682                  * Make sure we don't exceed our filters limit.
1683                  * if there is still a valid filter to be configured,
1684                  * be on the safe side and just allow bcast for this mac.
1685                  */
1686                 if (WARN_ON_ONCE(data->current_filter >=
1687                                  ARRAY_SIZE(cmd->filters))) {
1688                         bcast_mac->default_discard = 0;
1689                         bcast_mac->attached_filters = 0;
1690                         break;
1691                 }
1692
1693                 iwl_mvm_set_bcast_filter(vif,
1694                                          &mvm->bcast_filters[i],
1695                                          &cmd->filters[data->current_filter]);
1696
1697                 /* skip current filter if it contains no attributes */
1698                 if (!cmd->filters[data->current_filter].num_attrs)
1699                         continue;
1700
1701                 /* attach the filter to current mac */
1702                 bcast_mac->attached_filters |=
1703                                 cpu_to_le16(BIT(data->current_filter));
1704
1705                 data->current_filter++;
1706         }
1707 }
1708
1709 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1710                                     struct iwl_bcast_filter_cmd *cmd)
1711 {
1712         struct iwl_bcast_iter_data iter_data = {
1713                 .mvm = mvm,
1714                 .cmd = cmd,
1715         };
1716
1717         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1718                 return false;
1719
1720         memset(cmd, 0, sizeof(*cmd));
1721         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1722         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1723
1724 #ifdef CONFIG_IWLWIFI_DEBUGFS
1725         /* use debugfs filters/macs if override is configured */
1726         if (mvm->dbgfs_bcast_filtering.override) {
1727                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1728                        sizeof(cmd->filters));
1729                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1730                        sizeof(cmd->macs));
1731                 return true;
1732         }
1733 #endif
1734
1735         /* if no filters are configured, do nothing */
1736         if (!mvm->bcast_filters)
1737                 return false;
1738
1739         /* configure and attach these filters for each associated sta vif */
1740         ieee80211_iterate_active_interfaces(
1741                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1742                 iwl_mvm_bcast_filter_iterator, &iter_data);
1743
1744         return true;
1745 }
1746
1747 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1748 {
1749         struct iwl_bcast_filter_cmd cmd;
1750
1751         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1752                 return 0;
1753
1754         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1755                 return 0;
1756
1757         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1758                                     sizeof(cmd), &cmd);
1759 }
1760 #else
1761 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1762 {
1763         return 0;
1764 }
1765 #endif
1766
1767 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1768                                     struct ieee80211_vif *vif)
1769 {
1770         struct iwl_mu_group_mgmt_cmd cmd = {};
1771
1772         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1773                WLAN_MEMBERSHIP_LEN);
1774         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1775                WLAN_USER_POSITION_LEN);
1776
1777         return iwl_mvm_send_cmd_pdu(mvm,
1778                                     WIDE_ID(DATA_PATH_GROUP,
1779                                             UPDATE_MU_GROUPS_CMD),
1780                                     0, sizeof(cmd), &cmd);
1781 }
1782
1783 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1784                                            struct ieee80211_vif *vif)
1785 {
1786         if (vif->mu_mimo_owner) {
1787                 struct iwl_mu_group_mgmt_notif *notif = _data;
1788
1789                 /*
1790                  * MU-MIMO Group Id action frame is little endian. We treat
1791                  * the data received from firmware as if it came from the
1792                  * action frame, so no conversion is needed.
1793                  */
1794                 ieee80211_update_mu_groups(vif,
1795                                            (u8 *)&notif->membership_status,
1796                                            (u8 *)&notif->user_position);
1797         }
1798 }
1799
1800 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1801                                struct iwl_rx_cmd_buffer *rxb)
1802 {
1803         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1804         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1805
1806         ieee80211_iterate_active_interfaces_atomic(
1807                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1808                         iwl_mvm_mu_mimo_iface_iterator, notif);
1809 }
1810
1811 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1812                                              struct ieee80211_vif *vif,
1813                                              struct ieee80211_bss_conf *bss_conf,
1814                                              u32 changes)
1815 {
1816         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1817         int ret;
1818
1819         /*
1820          * Re-calculate the tsf id, as the master-slave relations depend on the
1821          * beacon interval, which was not known when the station interface was
1822          * added.
1823          */
1824         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1825                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1826
1827         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1828             mvmvif->lqm_active)
1829                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1830                                      0, 0);
1831
1832         /*
1833          * If we're not associated yet, take the (new) BSSID before associating
1834          * so the firmware knows. If we're already associated, then use the old
1835          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1836          * branch for disassociation below.
1837          */
1838         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1839                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1840
1841         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1842         if (ret)
1843                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1844
1845         /* after sending it once, adopt mac80211 data */
1846         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1847         mvmvif->associated = bss_conf->assoc;
1848
1849         if (changes & BSS_CHANGED_ASSOC) {
1850                 if (bss_conf->assoc) {
1851                         /* clear statistics to get clean beacon counter */
1852                         iwl_mvm_request_statistics(mvm, true);
1853                         memset(&mvmvif->beacon_stats, 0,
1854                                sizeof(mvmvif->beacon_stats));
1855
1856                         /* add quota for this interface */
1857                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1858                         if (ret) {
1859                                 IWL_ERR(mvm, "failed to update quotas\n");
1860                                 return;
1861                         }
1862
1863                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1864                                      &mvm->status)) {
1865                                 /*
1866                                  * If we're restarting then the firmware will
1867                                  * obviously have lost synchronisation with
1868                                  * the AP. It will attempt to synchronise by
1869                                  * itself, but we can make it more reliable by
1870                                  * scheduling a session protection time event.
1871                                  *
1872                                  * The firmware needs to receive a beacon to
1873                                  * catch up with synchronisation, use 110% of
1874                                  * the beacon interval.
1875                                  *
1876                                  * Set a large maximum delay to allow for more
1877                                  * than a single interface.
1878                                  */
1879                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1880                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1881                                                         5 * dur, false);
1882                         }
1883
1884                         iwl_mvm_sf_update(mvm, vif, false);
1885                         iwl_mvm_power_vif_assoc(mvm, vif);
1886                         if (vif->p2p) {
1887                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1888                                 iwl_mvm_update_smps(mvm, vif,
1889                                                     IWL_MVM_SMPS_REQ_PROT,
1890                                                     IEEE80211_SMPS_DYNAMIC);
1891                         }
1892                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1893                         /*
1894                          * If update fails - SF might be running in associated
1895                          * mode while disassociated - which is forbidden.
1896                          */
1897                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1898                                   "Failed to update SF upon disassociation\n");
1899
1900                         /* remove AP station now that the MAC is unassoc */
1901                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1902                         if (ret)
1903                                 IWL_ERR(mvm, "failed to remove AP station\n");
1904
1905                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1906                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1907                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1908                         /* remove quota for this interface */
1909                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1910                         if (ret)
1911                                 IWL_ERR(mvm, "failed to update quotas\n");
1912
1913                         if (vif->p2p)
1914                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1915
1916                         /* this will take the cleared BSSID from bss_conf */
1917                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1918                         if (ret)
1919                                 IWL_ERR(mvm,
1920                                         "failed to update MAC %pM (clear after unassoc)\n",
1921                                         vif->addr);
1922                 }
1923
1924                 /*
1925                  * The firmware tracks the MU-MIMO group on its own.
1926                  * However, on HW restart we should restore this data.
1927                  */
1928                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1929                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1930                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1931                         if (ret)
1932                                 IWL_ERR(mvm,
1933                                         "failed to update VHT MU_MIMO groups\n");
1934                 }
1935
1936                 iwl_mvm_recalc_multicast(mvm);
1937                 iwl_mvm_configure_bcast_filter(mvm);
1938
1939                 /* reset rssi values */
1940                 mvmvif->bf_data.ave_beacon_signal = 0;
1941
1942                 iwl_mvm_bt_coex_vif_change(mvm);
1943                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1944                                     IEEE80211_SMPS_AUTOMATIC);
1945                 if (fw_has_capa(&mvm->fw->ucode_capa,
1946                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1947                         iwl_mvm_config_scan(mvm);
1948         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1949                 /*
1950                  * We received a beacon _after_ association so
1951                  * remove the session protection.
1952                  */
1953                 iwl_mvm_remove_time_event(mvm, mvmvif,
1954                                           &mvmvif->time_event_data);
1955         }
1956
1957         if (changes & BSS_CHANGED_BEACON_INFO) {
1958                 iwl_mvm_sf_update(mvm, vif, false);
1959                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1960         }
1961
1962         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
1963                        /*
1964                         * Send power command on every beacon change,
1965                         * because we may have not enabled beacon abort yet.
1966                         */
1967                        BSS_CHANGED_BEACON_INFO)) {
1968                 ret = iwl_mvm_power_update_mac(mvm);
1969                 if (ret)
1970                         IWL_ERR(mvm, "failed to update power mode\n");
1971         }
1972
1973         if (changes & BSS_CHANGED_TXPOWER) {
1974                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1975                                 bss_conf->txpower);
1976                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1977         }
1978
1979         if (changes & BSS_CHANGED_CQM) {
1980                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1981                 /* reset cqm events tracking */
1982                 mvmvif->bf_data.last_cqm_event = 0;
1983                 if (mvmvif->bf_data.bf_enabled) {
1984                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1985                         if (ret)
1986                                 IWL_ERR(mvm,
1987                                         "failed to update CQM thresholds\n");
1988                 }
1989         }
1990
1991         if (changes & BSS_CHANGED_ARP_FILTER) {
1992                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1993                 iwl_mvm_configure_bcast_filter(mvm);
1994         }
1995 }
1996
1997 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1998                                  struct ieee80211_vif *vif)
1999 {
2000         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2001         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2002         int ret;
2003
2004         /*
2005          * iwl_mvm_mac_ctxt_add() might read directly from the device
2006          * (the system time), so make sure it is available.
2007          */
2008         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2009         if (ret)
2010                 return ret;
2011
2012         mutex_lock(&mvm->mutex);
2013
2014         /* Send the beacon template */
2015         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2016         if (ret)
2017                 goto out_unlock;
2018
2019         /*
2020          * Re-calculate the tsf id, as the master-slave relations depend on the
2021          * beacon interval, which was not known when the AP interface was added.
2022          */
2023         if (vif->type == NL80211_IFTYPE_AP)
2024                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2025
2026         mvmvif->ap_assoc_sta_count = 0;
2027
2028         /* Add the mac context */
2029         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2030         if (ret)
2031                 goto out_unlock;
2032
2033         /* Perform the binding */
2034         ret = iwl_mvm_binding_add_vif(mvm, vif);
2035         if (ret)
2036                 goto out_remove;
2037
2038         /* Send the bcast station. At this stage the TBTT and DTIM time events
2039          * are added and applied to the scheduler */
2040         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2041         if (ret)
2042                 goto out_unbind;
2043
2044         /* must be set before quota calculations */
2045         mvmvif->ap_ibss_active = true;
2046
2047         /* power updated needs to be done before quotas */
2048         iwl_mvm_power_update_mac(mvm);
2049
2050         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2051         if (ret)
2052                 goto out_quota_failed;
2053
2054         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2055         if (vif->p2p && mvm->p2p_device_vif)
2056                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2057
2058         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2059
2060         iwl_mvm_bt_coex_vif_change(mvm);
2061
2062         /* we don't support TDLS during DCM */
2063         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2064                 iwl_mvm_teardown_tdls_peers(mvm);
2065
2066         goto out_unlock;
2067
2068 out_quota_failed:
2069         iwl_mvm_power_update_mac(mvm);
2070         mvmvif->ap_ibss_active = false;
2071         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2072 out_unbind:
2073         iwl_mvm_binding_remove_vif(mvm, vif);
2074 out_remove:
2075         iwl_mvm_mac_ctxt_remove(mvm, vif);
2076 out_unlock:
2077         mutex_unlock(&mvm->mutex);
2078         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2079         return ret;
2080 }
2081
2082 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2083                                  struct ieee80211_vif *vif)
2084 {
2085         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2086         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2087
2088         iwl_mvm_prepare_mac_removal(mvm, vif);
2089
2090         mutex_lock(&mvm->mutex);
2091
2092         /* Handle AP stop while in CSA */
2093         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2094                 iwl_mvm_remove_time_event(mvm, mvmvif,
2095                                           &mvmvif->time_event_data);
2096                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2097                 mvmvif->csa_countdown = false;
2098         }
2099
2100         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2101                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2102                 mvm->csa_tx_block_bcn_timeout = 0;
2103         }
2104
2105         mvmvif->ap_ibss_active = false;
2106         mvm->ap_last_beacon_gp2 = 0;
2107
2108         iwl_mvm_bt_coex_vif_change(mvm);
2109
2110         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2111
2112         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2113         if (vif->p2p && mvm->p2p_device_vif)
2114                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2115
2116         iwl_mvm_update_quotas(mvm, false, NULL);
2117         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2118         iwl_mvm_binding_remove_vif(mvm, vif);
2119
2120         iwl_mvm_power_update_mac(mvm);
2121
2122         iwl_mvm_mac_ctxt_remove(mvm, vif);
2123
2124         mutex_unlock(&mvm->mutex);
2125 }
2126
2127 static void
2128 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2129                                  struct ieee80211_vif *vif,
2130                                  struct ieee80211_bss_conf *bss_conf,
2131                                  u32 changes)
2132 {
2133         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2134
2135         /* Changes will be applied when the AP/IBSS is started */
2136         if (!mvmvif->ap_ibss_active)
2137                 return;
2138
2139         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2140                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2141             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2142                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2143
2144         /* Need to send a new beacon template to the FW */
2145         if (changes & BSS_CHANGED_BEACON &&
2146             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2147                 IWL_WARN(mvm, "Failed updating beacon data\n");
2148
2149         if (changes & BSS_CHANGED_TXPOWER) {
2150                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2151                                 bss_conf->txpower);
2152                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2153         }
2154 }
2155
2156 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2157                                      struct ieee80211_vif *vif,
2158                                      struct ieee80211_bss_conf *bss_conf,
2159                                      u32 changes)
2160 {
2161         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2162
2163         /*
2164          * iwl_mvm_bss_info_changed_station() might call
2165          * iwl_mvm_protect_session(), which reads directly from
2166          * the device (the system time), so make sure it is available.
2167          */
2168         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2169                 return;
2170
2171         mutex_lock(&mvm->mutex);
2172
2173         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2174                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2175
2176         switch (vif->type) {
2177         case NL80211_IFTYPE_STATION:
2178                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2179                 break;
2180         case NL80211_IFTYPE_AP:
2181         case NL80211_IFTYPE_ADHOC:
2182                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2183                 break;
2184         default:
2185                 /* shouldn't happen */
2186                 WARN_ON_ONCE(1);
2187         }
2188
2189         mutex_unlock(&mvm->mutex);
2190         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2191 }
2192
2193 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2194                                struct ieee80211_vif *vif,
2195                                struct ieee80211_scan_request *hw_req)
2196 {
2197         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2198         int ret;
2199
2200         if (hw_req->req.n_channels == 0 ||
2201             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2202                 return -EINVAL;
2203
2204         mutex_lock(&mvm->mutex);
2205         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2206         mutex_unlock(&mvm->mutex);
2207
2208         return ret;
2209 }
2210
2211 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2212                                        struct ieee80211_vif *vif)
2213 {
2214         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2215
2216         mutex_lock(&mvm->mutex);
2217
2218         /* Due to a race condition, it's possible that mac80211 asks
2219          * us to stop a hw_scan when it's already stopped.  This can
2220          * happen, for instance, if we stopped the scan ourselves,
2221          * called ieee80211_scan_completed() and the userspace called
2222          * cancel scan scan before ieee80211_scan_work() could run.
2223          * To handle that, simply return if the scan is not running.
2224         */
2225         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2226                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2227
2228         mutex_unlock(&mvm->mutex);
2229 }
2230
2231 static void
2232 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2233                                   struct ieee80211_sta *sta, u16 tids,
2234                                   int num_frames,
2235                                   enum ieee80211_frame_release_type reason,
2236                                   bool more_data)
2237 {
2238         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2239
2240         /* Called when we need to transmit (a) frame(s) from mac80211 */
2241
2242         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2243                                           tids, more_data, false);
2244 }
2245
2246 static void
2247 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2248                                     struct ieee80211_sta *sta, u16 tids,
2249                                     int num_frames,
2250                                     enum ieee80211_frame_release_type reason,
2251                                     bool more_data)
2252 {
2253         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2254
2255         /* Called when we need to transmit (a) frame(s) from agg queue */
2256
2257         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2258                                           tids, more_data, true);
2259 }
2260
2261 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2262                                    struct ieee80211_vif *vif,
2263                                    enum sta_notify_cmd cmd,
2264                                    struct ieee80211_sta *sta)
2265 {
2266         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2267         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2268         unsigned long txqs = 0, tids = 0;
2269         int tid;
2270
2271         spin_lock_bh(&mvmsta->lock);
2272         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2273                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2274
2275                 if (tid_data->state != IWL_AGG_ON &&
2276                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2277                         continue;
2278
2279                 __set_bit(tid_data->txq_id, &txqs);
2280
2281                 if (iwl_mvm_tid_queued(tid_data) == 0)
2282                         continue;
2283
2284                 __set_bit(tid, &tids);
2285         }
2286
2287         switch (cmd) {
2288         case STA_NOTIFY_SLEEP:
2289                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2290                         ieee80211_sta_block_awake(hw, sta, true);
2291
2292                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2293                         ieee80211_sta_set_buffered(sta, tid, true);
2294
2295                 if (txqs)
2296                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2297                 /*
2298                  * The fw updates the STA to be asleep. Tx packets on the Tx
2299                  * queues to this station will not be transmitted. The fw will
2300                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2301                  */
2302                 break;
2303         case STA_NOTIFY_AWAKE:
2304                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2305                         break;
2306
2307                 if (txqs)
2308                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2309                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2310                 break;
2311         default:
2312                 break;
2313         }
2314         spin_unlock_bh(&mvmsta->lock);
2315 }
2316
2317 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2318                                        struct ieee80211_vif *vif,
2319                                        struct ieee80211_sta *sta)
2320 {
2321         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2322         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2323
2324         /*
2325          * This is called before mac80211 does RCU synchronisation,
2326          * so here we already invalidate our internal RCU-protected
2327          * station pointer. The rest of the code will thus no longer
2328          * be able to find the station this way, and we don't rely
2329          * on further RCU synchronisation after the sta_state()
2330          * callback deleted the station.
2331          */
2332         mutex_lock(&mvm->mutex);
2333         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2334                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2335                                    ERR_PTR(-ENOENT));
2336
2337         mutex_unlock(&mvm->mutex);
2338 }
2339
2340 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2341                                 const u8 *bssid)
2342 {
2343         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2344                 return;
2345
2346         if (vif->p2p && !iwl_mvm_is_p2p_standalone_uapsd_supported(mvm)) {
2347                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2348                 return;
2349         }
2350
2351         if (!vif->p2p &&
2352             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2353                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2354                 return;
2355         }
2356
2357         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2358 }
2359
2360 static void
2361 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2362                            struct ieee80211_vif *vif, u8 *peer_addr,
2363                            enum nl80211_tdls_operation action)
2364 {
2365         struct iwl_fw_dbg_trigger_tlv *trig;
2366         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2367
2368         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2369                 return;
2370
2371         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2372         tdls_trig = (void *)trig->data;
2373         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2374                 return;
2375
2376         if (!(tdls_trig->action_bitmap & BIT(action)))
2377                 return;
2378
2379         if (tdls_trig->peer_mode &&
2380             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2381                 return;
2382
2383         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2384                                     "TDLS event occurred, peer %pM, action %d",
2385                                     peer_addr, action);
2386 }
2387
2388 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2389                                              struct iwl_mvm_sta *mvm_sta)
2390 {
2391         struct iwl_mvm_tid_data *tid_data;
2392         struct sk_buff *skb;
2393         int i;
2394
2395         spin_lock_bh(&mvm_sta->lock);
2396         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2397                 tid_data = &mvm_sta->tid_data[i];
2398                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2399                         ieee80211_free_txskb(mvm->hw, skb);
2400         }
2401         spin_unlock_bh(&mvm_sta->lock);
2402 }
2403
2404 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2405                                  struct ieee80211_vif *vif,
2406                                  struct ieee80211_sta *sta,
2407                                  enum ieee80211_sta_state old_state,
2408                                  enum ieee80211_sta_state new_state)
2409 {
2410         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2411         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2412         int ret;
2413
2414         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2415                            sta->addr, old_state, new_state);
2416
2417         /* this would be a mac80211 bug ... but don't crash */
2418         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2419                 return -EINVAL;
2420
2421         /* if a STA is being removed, reuse its ID */
2422         flush_work(&mvm->sta_drained_wk);
2423
2424         /*
2425          * If we are in a STA removal flow and in DQA mode:
2426          *
2427          * This is after the sync_rcu part, so the queues have already been
2428          * flushed. No more TXs on their way in mac80211's path, and no more in
2429          * the queues.
2430          * Also, we won't be getting any new TX frames for this station.
2431          * What we might have are deferred TX frames that need to be taken care
2432          * of.
2433          *
2434          * Drop any still-queued deferred-frame before removing the STA, and
2435          * make sure the worker is no longer handling frames for this STA.
2436          */
2437         if (old_state == IEEE80211_STA_NONE &&
2438             new_state == IEEE80211_STA_NOTEXIST &&
2439             iwl_mvm_is_dqa_supported(mvm)) {
2440                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2441
2442                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2443                 flush_work(&mvm->add_stream_wk);
2444
2445                 /*
2446                  * No need to make sure deferred TX indication is off since the
2447                  * worker will already remove it if it was on
2448                  */
2449         }
2450
2451         mutex_lock(&mvm->mutex);
2452         if (old_state == IEEE80211_STA_NOTEXIST &&
2453             new_state == IEEE80211_STA_NONE) {
2454                 /*
2455                  * Firmware bug - it'll crash if the beacon interval is less
2456                  * than 16. We can't avoid connecting at all, so refuse the
2457                  * station state change, this will cause mac80211 to abandon
2458                  * attempts to connect to this AP, and eventually wpa_s will
2459                  * blacklist the AP...
2460                  */
2461                 if (vif->type == NL80211_IFTYPE_STATION &&
2462                     vif->bss_conf.beacon_int < 16) {
2463                         IWL_ERR(mvm,
2464                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2465                                 sta->addr, vif->bss_conf.beacon_int);
2466                         ret = -EINVAL;
2467                         goto out_unlock;
2468                 }
2469
2470                 if (sta->tdls &&
2471                     (vif->p2p ||
2472                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2473                                                 IWL_MVM_TDLS_STA_COUNT ||
2474                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2475                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2476                         ret = -EBUSY;
2477                         goto out_unlock;
2478                 }
2479
2480                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2481                 if (sta->tdls && ret == 0) {
2482                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2483                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2484                                                    NL80211_TDLS_SETUP);
2485                 }
2486         } else if (old_state == IEEE80211_STA_NONE &&
2487                    new_state == IEEE80211_STA_AUTH) {
2488                 /*
2489                  * EBS may be disabled due to previous failures reported by FW.
2490                  * Reset EBS status here assuming environment has been changed.
2491                  */
2492                 mvm->last_ebs_successful = true;
2493                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2494                 ret = 0;
2495         } else if (old_state == IEEE80211_STA_AUTH &&
2496                    new_state == IEEE80211_STA_ASSOC) {
2497                 if (vif->type == NL80211_IFTYPE_AP) {
2498                         mvmvif->ap_assoc_sta_count++;
2499                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2500                 }
2501                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2502                 if (ret == 0)
2503                         iwl_mvm_rs_rate_init(mvm, sta,
2504                                              mvmvif->phy_ctxt->channel->band,
2505                                              true);
2506         } else if (old_state == IEEE80211_STA_ASSOC &&
2507                    new_state == IEEE80211_STA_AUTHORIZED) {
2508
2509                 /* we don't support TDLS during DCM */
2510                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2511                         iwl_mvm_teardown_tdls_peers(mvm);
2512
2513                 if (sta->tdls)
2514                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2515                                                    NL80211_TDLS_ENABLE_LINK);
2516
2517                 /* enable beacon filtering */
2518                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2519                 ret = 0;
2520         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2521                    new_state == IEEE80211_STA_ASSOC) {
2522                 /* disable beacon filtering */
2523                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2524                 ret = 0;
2525         } else if (old_state == IEEE80211_STA_ASSOC &&
2526                    new_state == IEEE80211_STA_AUTH) {
2527                 if (vif->type == NL80211_IFTYPE_AP) {
2528                         mvmvif->ap_assoc_sta_count--;
2529                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2530                 }
2531                 ret = 0;
2532         } else if (old_state == IEEE80211_STA_AUTH &&
2533                    new_state == IEEE80211_STA_NONE) {
2534                 ret = 0;
2535         } else if (old_state == IEEE80211_STA_NONE &&
2536                    new_state == IEEE80211_STA_NOTEXIST) {
2537                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2538                 if (sta->tdls) {
2539                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2540                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2541                                                    NL80211_TDLS_DISABLE_LINK);
2542                 }
2543         } else {
2544                 ret = -EIO;
2545         }
2546  out_unlock:
2547         mutex_unlock(&mvm->mutex);
2548
2549         if (sta->tdls && ret == 0) {
2550                 if (old_state == IEEE80211_STA_NOTEXIST &&
2551                     new_state == IEEE80211_STA_NONE)
2552                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2553                 else if (old_state == IEEE80211_STA_NONE &&
2554                          new_state == IEEE80211_STA_NOTEXIST)
2555                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2556         }
2557
2558         return ret;
2559 }
2560
2561 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2562 {
2563         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2564
2565         mvm->rts_threshold = value;
2566
2567         return 0;
2568 }
2569
2570 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2571                                   struct ieee80211_vif *vif,
2572                                   struct ieee80211_sta *sta, u32 changed)
2573 {
2574         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2575
2576         if (vif->type == NL80211_IFTYPE_STATION &&
2577             changed & IEEE80211_RC_NSS_CHANGED)
2578                 iwl_mvm_sf_update(mvm, vif, false);
2579 }
2580
2581 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2582                                struct ieee80211_vif *vif, u16 ac,
2583                                const struct ieee80211_tx_queue_params *params)
2584 {
2585         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2586         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2587
2588         mvmvif->queue_params[ac] = *params;
2589
2590         /*
2591          * No need to update right away, we'll get BSS_CHANGED_QOS
2592          * The exception is P2P_DEVICE interface which needs immediate update.
2593          */
2594         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2595                 int ret;
2596
2597                 mutex_lock(&mvm->mutex);
2598                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2599                 mutex_unlock(&mvm->mutex);
2600                 return ret;
2601         }
2602         return 0;
2603 }
2604
2605 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2606                                       struct ieee80211_vif *vif)
2607 {
2608         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2609         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2610         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2611
2612         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2613                 return;
2614
2615         /*
2616          * iwl_mvm_protect_session() reads directly from the device
2617          * (the system time), so make sure it is available.
2618          */
2619         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2620                 return;
2621
2622         mutex_lock(&mvm->mutex);
2623         /* Try really hard to protect the session and hear a beacon */
2624         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2625         mutex_unlock(&mvm->mutex);
2626
2627         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2628 }
2629
2630 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2631                                         struct ieee80211_vif *vif,
2632                                         struct cfg80211_sched_scan_request *req,
2633                                         struct ieee80211_scan_ies *ies)
2634 {
2635         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2636
2637         int ret;
2638
2639         mutex_lock(&mvm->mutex);
2640
2641         if (!vif->bss_conf.idle) {
2642                 ret = -EBUSY;
2643                 goto out;
2644         }
2645
2646         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2647
2648 out:
2649         mutex_unlock(&mvm->mutex);
2650         return ret;
2651 }
2652
2653 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2654                                        struct ieee80211_vif *vif)
2655 {
2656         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2657         int ret;
2658
2659         mutex_lock(&mvm->mutex);
2660
2661         /* Due to a race condition, it's possible that mac80211 asks
2662          * us to stop a sched_scan when it's already stopped.  This
2663          * can happen, for instance, if we stopped the scan ourselves,
2664          * called ieee80211_sched_scan_stopped() and the userspace called
2665          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2666          * could run.  To handle this, simply return if the scan is
2667          * not running.
2668         */
2669         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2670                 mutex_unlock(&mvm->mutex);
2671                 return 0;
2672         }
2673
2674         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2675         mutex_unlock(&mvm->mutex);
2676         iwl_mvm_wait_for_async_handlers(mvm);
2677
2678         return ret;
2679 }
2680
2681 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2682                                enum set_key_cmd cmd,
2683                                struct ieee80211_vif *vif,
2684                                struct ieee80211_sta *sta,
2685                                struct ieee80211_key_conf *key)
2686 {
2687         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2688         struct iwl_mvm_sta *mvmsta;
2689         struct iwl_mvm_key_pn *ptk_pn;
2690         int keyidx = key->keyidx;
2691         int ret;
2692         u8 key_offset;
2693
2694         if (iwlwifi_mod_params.sw_crypto) {
2695                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2696                 return -EOPNOTSUPP;
2697         }
2698
2699         switch (key->cipher) {
2700         case WLAN_CIPHER_SUITE_TKIP:
2701                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2702                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2703                 break;
2704         case WLAN_CIPHER_SUITE_CCMP:
2705                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2706                 break;
2707         case WLAN_CIPHER_SUITE_AES_CMAC:
2708                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2709                 break;
2710         case WLAN_CIPHER_SUITE_WEP40:
2711         case WLAN_CIPHER_SUITE_WEP104:
2712                 /* For non-client mode, only use WEP keys for TX as we probably
2713                  * don't have a station yet anyway and would then have to keep
2714                  * track of the keys, linking them to each of the clients/peers
2715                  * as they appear. For now, don't do that, for performance WEP
2716                  * offload doesn't really matter much, but we need it for some
2717                  * other offload features in client mode.
2718                  */
2719                 if (vif->type != NL80211_IFTYPE_STATION)
2720                         return 0;
2721                 break;
2722         default:
2723                 /* currently FW supports only one optional cipher scheme */
2724                 if (hw->n_cipher_schemes &&
2725                     hw->cipher_schemes->cipher == key->cipher)
2726                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2727                 else
2728                         return -EOPNOTSUPP;
2729         }
2730
2731         mutex_lock(&mvm->mutex);
2732
2733         switch (cmd) {
2734         case SET_KEY:
2735                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2736                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2737                         /*
2738                          * GTK on AP interface is a TX-only key, return 0;
2739                          * on IBSS they're per-station and because we're lazy
2740                          * we don't support them for RX, so do the same.
2741                          * CMAC in AP/IBSS modes must be done in software.
2742                          */
2743                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2744                                 ret = -EOPNOTSUPP;
2745                         else
2746                                 ret = 0;
2747                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2748                         break;
2749                 }
2750
2751                 /* During FW restart, in order to restore the state as it was,
2752                  * don't try to reprogram keys we previously failed for.
2753                  */
2754                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2755                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2756                         IWL_DEBUG_MAC80211(mvm,
2757                                            "skip invalid idx key programming during restart\n");
2758                         ret = 0;
2759                         break;
2760                 }
2761
2762                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2763                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2764                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2765                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2766                      key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2767                         struct ieee80211_key_seq seq;
2768                         int tid, q;
2769
2770                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2771                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2772                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2773                                          mvm->trans->num_rx_queues *
2774                                                 sizeof(ptk_pn->q[0]),
2775                                          GFP_KERNEL);
2776                         if (!ptk_pn) {
2777                                 ret = -ENOMEM;
2778                                 break;
2779                         }
2780
2781                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2782                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2783                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2784                                         memcpy(ptk_pn->q[q].pn[tid],
2785                                                seq.ccmp.pn,
2786                                                IEEE80211_CCMP_PN_LEN);
2787                         }
2788
2789                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2790                 }
2791
2792                 /* in HW restart reuse the index, otherwise request a new one */
2793                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2794                         key_offset = key->hw_key_idx;
2795                 else
2796                         key_offset = STA_KEY_IDX_INVALID;
2797
2798                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2799                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2800                 if (ret) {
2801                         IWL_WARN(mvm, "set key failed\n");
2802                         /*
2803                          * can't add key for RX, but we don't need it
2804                          * in the device for TX so still return 0
2805                          */
2806                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2807                         ret = 0;
2808                 }
2809
2810                 break;
2811         case DISABLE_KEY:
2812                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2813                         ret = 0;
2814                         break;
2815                 }
2816
2817                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2818                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2819                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2820                      key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2821                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2822                         ptk_pn = rcu_dereference_protected(
2823                                                 mvmsta->ptk_pn[keyidx],
2824                                                 lockdep_is_held(&mvm->mutex));
2825                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2826                         if (ptk_pn)
2827                                 kfree_rcu(ptk_pn, rcu_head);
2828                 }
2829
2830                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2831                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2832                 break;
2833         default:
2834                 ret = -EINVAL;
2835         }
2836
2837         mutex_unlock(&mvm->mutex);
2838         return ret;
2839 }
2840
2841 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2842                                         struct ieee80211_vif *vif,
2843                                         struct ieee80211_key_conf *keyconf,
2844                                         struct ieee80211_sta *sta,
2845                                         u32 iv32, u16 *phase1key)
2846 {
2847         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2848
2849         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2850                 return;
2851
2852         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2853 }
2854
2855
2856 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2857                                struct iwl_rx_packet *pkt, void *data)
2858 {
2859         struct iwl_mvm *mvm =
2860                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2861         struct iwl_hs20_roc_res *resp;
2862         int resp_len = iwl_rx_packet_payload_len(pkt);
2863         struct iwl_mvm_time_event_data *te_data = data;
2864
2865         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2866                 return true;
2867
2868         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2869                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2870                 return true;
2871         }
2872
2873         resp = (void *)pkt->data;
2874
2875         IWL_DEBUG_TE(mvm,
2876                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2877                      resp->status, resp->event_unique_id);
2878
2879         te_data->uid = le32_to_cpu(resp->event_unique_id);
2880         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2881                      te_data->uid);
2882
2883         spin_lock_bh(&mvm->time_event_lock);
2884         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2885         spin_unlock_bh(&mvm->time_event_lock);
2886
2887         return true;
2888 }
2889
2890 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2891 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2892 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2893 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2894 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2895 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2896                                     struct ieee80211_channel *channel,
2897                                     struct ieee80211_vif *vif,
2898                                     int duration)
2899 {
2900         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2901         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2902         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2903         static const u16 time_event_response[] = { HOT_SPOT_CMD };
2904         struct iwl_notification_wait wait_time_event;
2905         u32 dtim_interval = vif->bss_conf.dtim_period *
2906                 vif->bss_conf.beacon_int;
2907         u32 req_dur, delay;
2908         struct iwl_hs20_roc_req aux_roc_req = {
2909                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2910                 .id_and_color =
2911                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2912                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2913                 /* Set the channel info data */
2914                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
2915                         PHY_BAND_24 : PHY_BAND_5,
2916                 .channel_info.channel = channel->hw_value,
2917                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2918                 /* Set the time and duration */
2919                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2920          };
2921
2922         delay = AUX_ROC_MIN_DELAY;
2923         req_dur = MSEC_TO_TU(duration);
2924
2925         /*
2926          * If we are associated we want the delay time to be at least one
2927          * dtim interval so that the FW can wait until after the DTIM and
2928          * then start the time event, this will potentially allow us to
2929          * remain off-channel for the max duration.
2930          * Since we want to use almost a whole dtim interval we would also
2931          * like the delay to be for 2-3 dtim intervals, in case there are
2932          * other time events with higher priority.
2933          */
2934         if (vif->bss_conf.assoc) {
2935                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
2936                 /* We cannot remain off-channel longer than the DTIM interval */
2937                 if (dtim_interval <= req_dur) {
2938                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
2939                         if (req_dur <= AUX_ROC_MIN_DURATION)
2940                                 req_dur = dtim_interval -
2941                                         AUX_ROC_MIN_SAFETY_BUFFER;
2942                 }
2943         }
2944
2945         aux_roc_req.duration = cpu_to_le32(req_dur);
2946         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
2947
2948         IWL_DEBUG_TE(mvm,
2949                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
2950                      channel->hw_value, req_dur, duration, delay,
2951                      dtim_interval);
2952         /* Set the node address */
2953         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2954
2955         lockdep_assert_held(&mvm->mutex);
2956
2957         spin_lock_bh(&mvm->time_event_lock);
2958
2959         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2960                 spin_unlock_bh(&mvm->time_event_lock);
2961                 return -EIO;
2962         }
2963
2964         te_data->vif = vif;
2965         te_data->duration = duration;
2966         te_data->id = HOT_SPOT_CMD;
2967
2968         spin_unlock_bh(&mvm->time_event_lock);
2969
2970         /*
2971          * Use a notification wait, which really just processes the
2972          * command response and doesn't wait for anything, in order
2973          * to be able to process the response and get the UID inside
2974          * the RX path. Using CMD_WANT_SKB doesn't work because it
2975          * stores the buffer and then wakes up this thread, by which
2976          * time another notification (that the time event started)
2977          * might already be processed unsuccessfully.
2978          */
2979         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2980                                    time_event_response,
2981                                    ARRAY_SIZE(time_event_response),
2982                                    iwl_mvm_rx_aux_roc, te_data);
2983
2984         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2985                                    &aux_roc_req);
2986
2987         if (res) {
2988                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2989                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2990                 goto out_clear_te;
2991         }
2992
2993         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2994         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2995         /* should never fail */
2996         WARN_ON_ONCE(res);
2997
2998         if (res) {
2999  out_clear_te:
3000                 spin_lock_bh(&mvm->time_event_lock);
3001                 iwl_mvm_te_clear_data(mvm, te_data);
3002                 spin_unlock_bh(&mvm->time_event_lock);
3003         }
3004
3005         return res;
3006 }
3007
3008 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3009                        struct ieee80211_vif *vif,
3010                        struct ieee80211_channel *channel,
3011                        int duration,
3012                        enum ieee80211_roc_type type)
3013 {
3014         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3015         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3016         struct cfg80211_chan_def chandef;
3017         struct iwl_mvm_phy_ctxt *phy_ctxt;
3018         int ret, i;
3019
3020         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3021                            duration, type);
3022
3023         flush_work(&mvm->roc_done_wk);
3024
3025         mutex_lock(&mvm->mutex);
3026
3027         switch (vif->type) {
3028         case NL80211_IFTYPE_STATION:
3029                 if (fw_has_capa(&mvm->fw->ucode_capa,
3030                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3031                         /* Use aux roc framework (HS20) */
3032                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3033                                                        vif, duration);
3034                         goto out_unlock;
3035                 }
3036                 IWL_ERR(mvm, "hotspot not supported\n");
3037                 ret = -EINVAL;
3038                 goto out_unlock;
3039         case NL80211_IFTYPE_P2P_DEVICE:
3040                 /* handle below */
3041                 break;
3042         default:
3043                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3044                 ret = -EINVAL;
3045                 goto out_unlock;
3046         }
3047
3048         for (i = 0; i < NUM_PHY_CTX; i++) {
3049                 phy_ctxt = &mvm->phy_ctxts[i];
3050                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3051                         continue;
3052
3053                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3054                         /*
3055                          * Unbind the P2P_DEVICE from the current PHY context,
3056                          * and if the PHY context is not used remove it.
3057                          */
3058                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3059                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3060                                 goto out_unlock;
3061
3062                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3063
3064                         /* Bind the P2P_DEVICE to the current PHY Context */
3065                         mvmvif->phy_ctxt = phy_ctxt;
3066
3067                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3068                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3069                                 goto out_unlock;
3070
3071                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3072                         goto schedule_time_event;
3073                 }
3074         }
3075
3076         /* Need to update the PHY context only if the ROC channel changed */
3077         if (channel == mvmvif->phy_ctxt->channel)
3078                 goto schedule_time_event;
3079
3080         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3081
3082         /*
3083          * Change the PHY context configuration as it is currently referenced
3084          * only by the P2P Device MAC
3085          */
3086         if (mvmvif->phy_ctxt->ref == 1) {
3087                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3088                                                &chandef, 1, 1);
3089                 if (ret)
3090                         goto out_unlock;
3091         } else {
3092                 /*
3093                  * The PHY context is shared with other MACs. Need to remove the
3094                  * P2P Device from the binding, allocate an new PHY context and
3095                  * create a new binding
3096                  */
3097                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3098                 if (!phy_ctxt) {
3099                         ret = -ENOSPC;
3100                         goto out_unlock;
3101                 }
3102
3103                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3104                                                1, 1);
3105                 if (ret) {
3106                         IWL_ERR(mvm, "Failed to change PHY context\n");
3107                         goto out_unlock;
3108                 }
3109
3110                 /* Unbind the P2P_DEVICE from the current PHY context */
3111                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3112                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3113                         goto out_unlock;
3114
3115                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3116
3117                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3118                 mvmvif->phy_ctxt = phy_ctxt;
3119
3120                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3121                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3122                         goto out_unlock;
3123
3124                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3125         }
3126
3127 schedule_time_event:
3128         /* Schedule the time events */
3129         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3130
3131 out_unlock:
3132         mutex_unlock(&mvm->mutex);
3133         IWL_DEBUG_MAC80211(mvm, "leave\n");
3134         return ret;
3135 }
3136
3137 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3138 {
3139         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3140
3141         IWL_DEBUG_MAC80211(mvm, "enter\n");
3142
3143         mutex_lock(&mvm->mutex);
3144         iwl_mvm_stop_roc(mvm);
3145         mutex_unlock(&mvm->mutex);
3146
3147         IWL_DEBUG_MAC80211(mvm, "leave\n");
3148         return 0;
3149 }
3150
3151 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3152                                  struct ieee80211_chanctx_conf *ctx)
3153 {
3154         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3155         struct iwl_mvm_phy_ctxt *phy_ctxt;
3156         int ret;
3157
3158         lockdep_assert_held(&mvm->mutex);
3159
3160         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3161
3162         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3163         if (!phy_ctxt) {
3164                 ret = -ENOSPC;
3165                 goto out;
3166         }
3167
3168         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3169                                        ctx->rx_chains_static,
3170                                        ctx->rx_chains_dynamic);
3171         if (ret) {
3172                 IWL_ERR(mvm, "Failed to add PHY context\n");
3173                 goto out;
3174         }
3175
3176         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3177         *phy_ctxt_id = phy_ctxt->id;
3178 out:
3179         return ret;
3180 }
3181
3182 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3183                                struct ieee80211_chanctx_conf *ctx)
3184 {
3185         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3186         int ret;
3187
3188         mutex_lock(&mvm->mutex);
3189         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3190         mutex_unlock(&mvm->mutex);
3191
3192         return ret;
3193 }
3194
3195 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3196                                      struct ieee80211_chanctx_conf *ctx)
3197 {
3198         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3199         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3200
3201         lockdep_assert_held(&mvm->mutex);
3202
3203         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3204 }
3205
3206 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3207                                    struct ieee80211_chanctx_conf *ctx)
3208 {
3209         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3210
3211         mutex_lock(&mvm->mutex);
3212         __iwl_mvm_remove_chanctx(mvm, ctx);
3213         mutex_unlock(&mvm->mutex);
3214 }
3215
3216 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3217                                    struct ieee80211_chanctx_conf *ctx,
3218                                    u32 changed)
3219 {
3220         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3221         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3222         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3223
3224         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3225                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3226                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3227                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3228                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3229                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3230                       phy_ctxt->ref, changed))
3231                 return;
3232
3233         mutex_lock(&mvm->mutex);
3234         iwl_mvm_bt_coex_vif_change(mvm);
3235         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3236                                  ctx->rx_chains_static,
3237                                  ctx->rx_chains_dynamic);
3238         mutex_unlock(&mvm->mutex);
3239 }
3240
3241 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3242                                         struct ieee80211_vif *vif,
3243                                         struct ieee80211_chanctx_conf *ctx,
3244                                         bool switching_chanctx)
3245 {
3246         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3247         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3248         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3249         int ret;
3250
3251         lockdep_assert_held(&mvm->mutex);
3252
3253         mvmvif->phy_ctxt = phy_ctxt;
3254
3255         switch (vif->type) {
3256         case NL80211_IFTYPE_AP:
3257                 /* only needed if we're switching chanctx (i.e. during CSA) */
3258                 if (switching_chanctx) {
3259                         mvmvif->ap_ibss_active = true;
3260                         break;
3261                 }
3262         case NL80211_IFTYPE_ADHOC:
3263                 /*
3264                  * The AP binding flow is handled as part of the start_ap flow
3265                  * (in bss_info_changed), similarly for IBSS.
3266                  */
3267                 ret = 0;
3268                 goto out;
3269         case NL80211_IFTYPE_STATION:
3270                 break;
3271         case NL80211_IFTYPE_MONITOR:
3272                 /* always disable PS when a monitor interface is active */
3273                 mvmvif->ps_disabled = true;
3274                 break;
3275         default:
3276                 ret = -EINVAL;
3277                 goto out;
3278         }
3279
3280         ret = iwl_mvm_binding_add_vif(mvm, vif);
3281         if (ret)
3282                 goto out;
3283
3284         /*
3285          * Power state must be updated before quotas,
3286          * otherwise fw will complain.
3287          */
3288         iwl_mvm_power_update_mac(mvm);
3289
3290         /* Setting the quota at this stage is only required for monitor
3291          * interfaces. For the other types, the bss_info changed flow
3292          * will handle quota settings.
3293          */
3294         if (vif->type == NL80211_IFTYPE_MONITOR) {
3295                 mvmvif->monitor_active = true;
3296                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3297                 if (ret)
3298                         goto out_remove_binding;
3299
3300                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3301                 if (ret)
3302                         goto out_remove_binding;
3303
3304         }
3305
3306         /* Handle binding during CSA */
3307         if (vif->type == NL80211_IFTYPE_AP) {
3308                 iwl_mvm_update_quotas(mvm, false, NULL);
3309                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3310         }
3311
3312         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3313                 u32 duration = 2 * vif->bss_conf.beacon_int;
3314
3315                 /* iwl_mvm_protect_session() reads directly from the
3316                  * device (the system time), so make sure it is
3317                  * available.
3318                  */
3319                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3320                 if (ret)
3321                         goto out_remove_binding;
3322
3323                 /* Protect the session to make sure we hear the first
3324                  * beacon on the new channel.
3325                  */
3326                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3327                                         vif->bss_conf.beacon_int / 2,
3328                                         true);
3329
3330                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3331
3332                 iwl_mvm_update_quotas(mvm, false, NULL);
3333         }
3334
3335         goto out;
3336
3337 out_remove_binding:
3338         iwl_mvm_binding_remove_vif(mvm, vif);
3339         iwl_mvm_power_update_mac(mvm);
3340 out:
3341         if (ret)
3342                 mvmvif->phy_ctxt = NULL;
3343         return ret;
3344 }
3345 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3346                                       struct ieee80211_vif *vif,
3347                                       struct ieee80211_chanctx_conf *ctx)
3348 {
3349         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3350         int ret;
3351
3352         mutex_lock(&mvm->mutex);
3353         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3354         mutex_unlock(&mvm->mutex);
3355
3356         return ret;
3357 }
3358
3359 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3360                                            struct ieee80211_vif *vif,
3361                                            struct ieee80211_chanctx_conf *ctx,
3362                                            bool switching_chanctx)
3363 {
3364         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3365         struct ieee80211_vif *disabled_vif = NULL;
3366
3367         lockdep_assert_held(&mvm->mutex);
3368
3369         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3370
3371         switch (vif->type) {
3372         case NL80211_IFTYPE_ADHOC:
3373                 goto out;
3374         case NL80211_IFTYPE_MONITOR:
3375                 mvmvif->monitor_active = false;
3376                 mvmvif->ps_disabled = false;
3377                 iwl_mvm_rm_snif_sta(mvm, vif);
3378                 break;
3379         case NL80211_IFTYPE_AP:
3380                 /* This part is triggered only during CSA */
3381                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3382                         goto out;
3383
3384                 mvmvif->csa_countdown = false;
3385
3386                 /* Set CS bit on all the stations */
3387                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3388
3389                 /* Save blocked iface, the timeout is set on the next beacon */
3390                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3391
3392                 mvmvif->ap_ibss_active = false;
3393                 break;
3394         case NL80211_IFTYPE_STATION:
3395                 if (!switching_chanctx)
3396                         break;
3397
3398                 disabled_vif = vif;
3399
3400                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3401                 break;
3402         default:
3403                 break;
3404         }
3405
3406         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3407         iwl_mvm_binding_remove_vif(mvm, vif);
3408
3409 out:
3410         mvmvif->phy_ctxt = NULL;
3411         iwl_mvm_power_update_mac(mvm);
3412 }
3413
3414 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3415                                          struct ieee80211_vif *vif,
3416                                          struct ieee80211_chanctx_conf *ctx)
3417 {
3418         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3419
3420         mutex_lock(&mvm->mutex);
3421         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3422         mutex_unlock(&mvm->mutex);
3423 }
3424
3425 static int
3426 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3427                                 struct ieee80211_vif_chanctx_switch *vifs)
3428 {
3429         int ret;
3430
3431         mutex_lock(&mvm->mutex);
3432         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3433         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3434
3435         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3436         if (ret) {
3437                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3438                 goto out_reassign;
3439         }
3440
3441         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3442                                            true);
3443         if (ret) {
3444                 IWL_ERR(mvm,
3445                         "failed to assign new_ctx during channel switch\n");
3446                 goto out_remove;
3447         }
3448
3449         /* we don't support TDLS during DCM - can be caused by channel switch */
3450         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3451                 iwl_mvm_teardown_tdls_peers(mvm);
3452
3453         goto out;
3454
3455 out_remove:
3456         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3457
3458 out_reassign:
3459         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3460                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3461                 goto out_restart;
3462         }
3463
3464         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3465                                          true)) {
3466                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3467                 goto out_restart;
3468         }
3469
3470         goto out;
3471
3472 out_restart:
3473         /* things keep failing, better restart the hw */
3474         iwl_mvm_nic_restart(mvm, false);
3475
3476 out:
3477         mutex_unlock(&mvm->mutex);
3478
3479         return ret;
3480 }
3481
3482 static int
3483 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3484                                     struct ieee80211_vif_chanctx_switch *vifs)
3485 {
3486         int ret;
3487
3488         mutex_lock(&mvm->mutex);
3489         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3490
3491         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3492                                            true);
3493         if (ret) {
3494                 IWL_ERR(mvm,
3495                         "failed to assign new_ctx during channel switch\n");
3496                 goto out_reassign;
3497         }
3498
3499         goto out;
3500
3501 out_reassign:
3502         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3503                                          true)) {
3504                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3505                 goto out_restart;
3506         }
3507
3508         goto out;
3509
3510 out_restart:
3511         /* things keep failing, better restart the hw */
3512         iwl_mvm_nic_restart(mvm, false);
3513
3514 out:
3515         mutex_unlock(&mvm->mutex);
3516
3517         return ret;
3518 }
3519
3520 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3521                                       struct ieee80211_vif_chanctx_switch *vifs,
3522                                       int n_vifs,
3523                                       enum ieee80211_chanctx_switch_mode mode)
3524 {
3525         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3526         int ret;
3527
3528         /* we only support a single-vif right now */
3529         if (n_vifs > 1)
3530                 return -EOPNOTSUPP;
3531
3532         switch (mode) {
3533         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3534                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3535                 break;
3536         case CHANCTX_SWMODE_REASSIGN_VIF:
3537                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3538                 break;
3539         default:
3540                 ret = -EOPNOTSUPP;
3541                 break;
3542         }
3543
3544         return ret;
3545 }
3546
3547 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3548                            struct ieee80211_sta *sta,
3549                            bool set)
3550 {
3551         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3552         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3553
3554         if (!mvm_sta || !mvm_sta->vif) {
3555                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3556                 return -EINVAL;
3557         }
3558
3559         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3560 }
3561
3562 #ifdef CONFIG_NL80211_TESTMODE
3563 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3564         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3565         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3566         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3567 };
3568
3569 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3570                                       struct ieee80211_vif *vif,
3571                                       void *data, int len)
3572 {
3573         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3574         int err;
3575         u32 noa_duration;
3576
3577         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3578         if (err)
3579                 return err;
3580
3581         if (!tb[IWL_MVM_TM_ATTR_CMD])
3582                 return -EINVAL;
3583
3584         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3585         case IWL_MVM_TM_CMD_SET_NOA:
3586                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3587                     !vif->bss_conf.enable_beacon ||
3588                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3589                         return -EINVAL;
3590
3591                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3592                 if (noa_duration >= vif->bss_conf.beacon_int)
3593                         return -EINVAL;
3594
3595                 mvm->noa_duration = noa_duration;
3596                 mvm->noa_vif = vif;
3597
3598                 return iwl_mvm_update_quotas(mvm, false, NULL);
3599         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3600                 /* must be associated client vif - ignore authorized */
3601                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3602                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3603                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3604                         return -EINVAL;
3605
3606                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3607                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3608                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3609         }
3610
3611         return -EOPNOTSUPP;
3612 }
3613
3614 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3615                                     struct ieee80211_vif *vif,
3616                                     void *data, int len)
3617 {
3618         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3619         int err;
3620
3621         mutex_lock(&mvm->mutex);
3622         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3623         mutex_unlock(&mvm->mutex);
3624
3625         return err;
3626 }
3627 #endif
3628
3629 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3630                                    struct ieee80211_vif *vif,
3631                                    struct ieee80211_channel_switch *chsw)
3632 {
3633         /* By implementing this operation, we prevent mac80211 from
3634          * starting its own channel switch timer, so that we can call
3635          * ieee80211_chswitch_done() ourselves at the right time
3636          * (which is when the absence time event starts).
3637          */
3638
3639         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3640                            "dummy channel switch op\n");
3641 }
3642
3643 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3644                                       struct ieee80211_vif *vif,
3645                                       struct ieee80211_channel_switch *chsw)
3646 {
3647         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3648         struct ieee80211_vif *csa_vif;
3649         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3650         u32 apply_time;
3651         int ret;
3652
3653         mutex_lock(&mvm->mutex);
3654
3655         mvmvif->csa_failed = false;
3656
3657         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3658                            chsw->chandef.center_freq1);
3659
3660         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3661
3662         switch (vif->type) {
3663         case NL80211_IFTYPE_AP:
3664                 csa_vif =
3665                         rcu_dereference_protected(mvm->csa_vif,
3666                                                   lockdep_is_held(&mvm->mutex));
3667                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3668                               "Another CSA is already in progress")) {
3669                         ret = -EBUSY;
3670                         goto out_unlock;
3671                 }
3672
3673                 rcu_assign_pointer(mvm->csa_vif, vif);
3674
3675                 if (WARN_ONCE(mvmvif->csa_countdown,
3676                               "Previous CSA countdown didn't complete")) {
3677                         ret = -EBUSY;
3678                         goto out_unlock;
3679                 }
3680
3681                 break;
3682         case NL80211_IFTYPE_STATION:
3683                 if (mvmvif->lqm_active)
3684                         iwl_mvm_send_lqm_cmd(vif,
3685                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3686                                              0, 0);
3687
3688                 /* Schedule the time event to a bit before beacon 1,
3689                  * to make sure we're in the new channel when the
3690                  * GO/AP arrives.
3691                  */
3692                 apply_time = chsw->device_timestamp +
3693                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3694                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3695
3696                 if (chsw->block_tx)
3697                         iwl_mvm_csa_client_absent(mvm, vif);
3698
3699                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3700                                             apply_time);
3701                 if (mvmvif->bf_data.bf_enabled) {
3702                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3703                         if (ret)
3704                                 goto out_unlock;
3705                 }
3706
3707                 break;
3708         default:
3709                 break;
3710         }
3711
3712         mvmvif->ps_disabled = true;
3713
3714         ret = iwl_mvm_power_update_ps(mvm);
3715         if (ret)
3716                 goto out_unlock;
3717
3718         /* we won't be on this channel any longer */
3719         iwl_mvm_teardown_tdls_peers(mvm);
3720
3721 out_unlock:
3722         mutex_unlock(&mvm->mutex);
3723
3724         return ret;
3725 }
3726
3727 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3728                                        struct ieee80211_vif *vif)
3729 {
3730         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3731         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3732         int ret;
3733
3734         mutex_lock(&mvm->mutex);
3735
3736         if (mvmvif->csa_failed) {
3737                 mvmvif->csa_failed = false;
3738                 ret = -EIO;
3739                 goto out_unlock;
3740         }
3741
3742         if (vif->type == NL80211_IFTYPE_STATION) {
3743                 struct iwl_mvm_sta *mvmsta;
3744
3745                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3746                                                           mvmvif->ap_sta_id);
3747
3748                 if (WARN_ON(!mvmsta)) {
3749                         ret = -EIO;
3750                         goto out_unlock;
3751                 }
3752
3753                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3754
3755                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3756
3757                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3758                 if (ret)
3759                         goto out_unlock;
3760
3761                 iwl_mvm_stop_session_protection(mvm, vif);
3762         }
3763
3764         mvmvif->ps_disabled = false;
3765
3766         ret = iwl_mvm_power_update_ps(mvm);
3767
3768 out_unlock:
3769         mutex_unlock(&mvm->mutex);
3770
3771         return ret;
3772 }
3773
3774 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3775                               struct ieee80211_vif *vif, u32 queues, bool drop)
3776 {
3777         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3778         struct iwl_mvm_vif *mvmvif;
3779         struct iwl_mvm_sta *mvmsta;
3780         struct ieee80211_sta *sta;
3781         int i;
3782         u32 msk = 0;
3783
3784         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3785                 return;
3786
3787         /* Make sure we're done with the deferred traffic before flushing */
3788         if (iwl_mvm_is_dqa_supported(mvm))
3789                 flush_work(&mvm->add_stream_wk);
3790
3791         mutex_lock(&mvm->mutex);
3792         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3793
3794         /* flush the AP-station and all TDLS peers */
3795         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3796                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3797                                                 lockdep_is_held(&mvm->mutex));
3798                 if (IS_ERR_OR_NULL(sta))
3799                         continue;
3800
3801                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3802                 if (mvmsta->vif != vif)
3803                         continue;
3804
3805                 /* make sure only TDLS peers or the AP are flushed */
3806                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3807
3808                 msk |= mvmsta->tfd_queue_msk;
3809         }
3810
3811         if (drop) {
3812                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3813                         IWL_ERR(mvm, "flush request fail\n");
3814                 mutex_unlock(&mvm->mutex);
3815         } else {
3816                 mutex_unlock(&mvm->mutex);
3817
3818                 /* this can take a while, and we may need/want other operations
3819                  * to succeed while doing this, so do it without the mutex held
3820                  */
3821                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3822         }
3823 }
3824
3825 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3826                                   struct survey_info *survey)
3827 {
3828         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3829         int ret;
3830
3831         memset(survey, 0, sizeof(*survey));
3832
3833         /* only support global statistics right now */
3834         if (idx != 0)
3835                 return -ENOENT;
3836
3837         if (fw_has_capa(&mvm->fw->ucode_capa,
3838                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3839                 return -ENOENT;
3840
3841         mutex_lock(&mvm->mutex);
3842
3843         if (mvm->ucode_loaded) {
3844                 ret = iwl_mvm_request_statistics(mvm, false);
3845                 if (ret)
3846                         goto out;
3847         }
3848
3849         survey->filled = SURVEY_INFO_TIME |
3850                          SURVEY_INFO_TIME_RX |
3851                          SURVEY_INFO_TIME_TX |
3852                          SURVEY_INFO_TIME_SCAN;
3853         survey->time = mvm->accu_radio_stats.on_time_rf +
3854                        mvm->radio_stats.on_time_rf;
3855         do_div(survey->time, USEC_PER_MSEC);
3856
3857         survey->time_rx = mvm->accu_radio_stats.rx_time +
3858                           mvm->radio_stats.rx_time;
3859         do_div(survey->time_rx, USEC_PER_MSEC);
3860
3861         survey->time_tx = mvm->accu_radio_stats.tx_time +
3862                           mvm->radio_stats.tx_time;
3863         do_div(survey->time_tx, USEC_PER_MSEC);
3864
3865         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3866                             mvm->radio_stats.on_time_scan;
3867         do_div(survey->time_scan, USEC_PER_MSEC);
3868
3869         ret = 0;
3870  out:
3871         mutex_unlock(&mvm->mutex);
3872         return ret;
3873 }
3874
3875 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3876                                        struct ieee80211_vif *vif,
3877                                        struct ieee80211_sta *sta,
3878                                        struct station_info *sinfo)
3879 {
3880         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3881         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3882         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3883
3884         if (fw_has_capa(&mvm->fw->ucode_capa,
3885                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3886                 return;
3887
3888         /* if beacon filtering isn't on mac80211 does it anyway */
3889         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3890                 return;
3891
3892         if (!vif->bss_conf.assoc)
3893                 return;
3894
3895         mutex_lock(&mvm->mutex);
3896
3897         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3898                 goto unlock;
3899
3900         if (iwl_mvm_request_statistics(mvm, false))
3901                 goto unlock;
3902
3903         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3904                            mvmvif->beacon_stats.accu_num_beacons;
3905         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3906         if (mvmvif->beacon_stats.avg_signal) {
3907                 /* firmware only reports a value after RXing a few beacons */
3908                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3909                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3910         }
3911  unlock:
3912         mutex_unlock(&mvm->mutex);
3913 }
3914
3915 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
3916                                         struct ieee80211_vif *vif,
3917                                         const struct ieee80211_event *event)
3918 {
3919 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3920         do {                                                    \
3921                 if ((_cnt) && --(_cnt))                         \
3922                         break;                                  \
3923                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3924         } while (0)
3925
3926         struct iwl_fw_dbg_trigger_tlv *trig;
3927         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3928
3929         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3930                 return;
3931
3932         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3933         trig_mlme = (void *)trig->data;
3934         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3935                 return;
3936
3937         if (event->u.mlme.data == ASSOC_EVENT) {
3938                 if (event->u.mlme.status == MLME_DENIED)
3939                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3940                                            trig_mlme->stop_assoc_denied,
3941                                            "DENIED ASSOC: reason %d",
3942                                             event->u.mlme.reason);
3943                 else if (event->u.mlme.status == MLME_TIMEOUT)
3944                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3945                                            trig_mlme->stop_assoc_timeout,
3946                                            "ASSOC TIMEOUT");
3947         } else if (event->u.mlme.data == AUTH_EVENT) {
3948                 if (event->u.mlme.status == MLME_DENIED)
3949                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3950                                            trig_mlme->stop_auth_denied,
3951                                            "DENIED AUTH: 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_auth_timeout,
3956                                            "AUTH TIMEOUT");
3957         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
3958                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3959                                    trig_mlme->stop_rx_deauth,
3960                                    "DEAUTH RX %d", event->u.mlme.reason);
3961         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
3962                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3963                                    trig_mlme->stop_tx_deauth,
3964                                    "DEAUTH TX %d", event->u.mlme.reason);
3965         }
3966 #undef CHECK_MLME_TRIGGER
3967 }
3968
3969 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
3970                                           struct ieee80211_vif *vif,
3971                                           const struct ieee80211_event *event)
3972 {
3973         struct iwl_fw_dbg_trigger_tlv *trig;
3974         struct iwl_fw_dbg_trigger_ba *ba_trig;
3975
3976         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
3977                 return;
3978
3979         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
3980         ba_trig = (void *)trig->data;
3981         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3982                 return;
3983
3984         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
3985                 return;
3986
3987         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
3988                                     "BAR received from %pM, tid %d, ssn %d",
3989                                     event->u.ba.sta->addr, event->u.ba.tid,
3990                                     event->u.ba.ssn);
3991 }
3992
3993 static void
3994 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
3995                                      struct ieee80211_vif *vif,
3996                                      const struct ieee80211_event *event)
3997 {
3998         struct iwl_fw_dbg_trigger_tlv *trig;
3999         struct iwl_fw_dbg_trigger_ba *ba_trig;
4000
4001         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4002                 return;
4003
4004         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4005         ba_trig = (void *)trig->data;
4006         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4007                 return;
4008
4009         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4010                 return;
4011
4012         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4013                                     "Frame from %pM timed out, tid %d",
4014                                     event->u.ba.sta->addr, event->u.ba.tid);
4015 }
4016
4017 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4018                                        struct ieee80211_vif *vif,
4019                                        const struct ieee80211_event *event)
4020 {
4021         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4022
4023         switch (event->type) {
4024         case MLME_EVENT:
4025                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4026                 break;
4027         case BAR_RX_EVENT:
4028                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4029                 break;
4030         case BA_FRAME_TIMEOUT:
4031                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4032                 break;
4033         default:
4034                 break;
4035         }
4036 }
4037
4038 const struct ieee80211_ops iwl_mvm_hw_ops = {
4039         .tx = iwl_mvm_mac_tx,
4040         .ampdu_action = iwl_mvm_mac_ampdu_action,
4041         .start = iwl_mvm_mac_start,
4042         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4043         .stop = iwl_mvm_mac_stop,
4044         .add_interface = iwl_mvm_mac_add_interface,
4045         .remove_interface = iwl_mvm_mac_remove_interface,
4046         .config = iwl_mvm_mac_config,
4047         .prepare_multicast = iwl_mvm_prepare_multicast,
4048         .configure_filter = iwl_mvm_configure_filter,
4049         .config_iface_filter = iwl_mvm_config_iface_filter,
4050         .bss_info_changed = iwl_mvm_bss_info_changed,
4051         .hw_scan = iwl_mvm_mac_hw_scan,
4052         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4053         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4054         .sta_state = iwl_mvm_mac_sta_state,
4055         .sta_notify = iwl_mvm_mac_sta_notify,
4056         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4057         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4058         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4059         .sta_rc_update = iwl_mvm_sta_rc_update,
4060         .conf_tx = iwl_mvm_mac_conf_tx,
4061         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4062         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4063         .flush = iwl_mvm_mac_flush,
4064         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4065         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4066         .set_key = iwl_mvm_mac_set_key,
4067         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4068         .remain_on_channel = iwl_mvm_roc,
4069         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4070         .add_chanctx = iwl_mvm_add_chanctx,
4071         .remove_chanctx = iwl_mvm_remove_chanctx,
4072         .change_chanctx = iwl_mvm_change_chanctx,
4073         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4074         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4075         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4076
4077         .start_ap = iwl_mvm_start_ap_ibss,
4078         .stop_ap = iwl_mvm_stop_ap_ibss,
4079         .join_ibss = iwl_mvm_start_ap_ibss,
4080         .leave_ibss = iwl_mvm_stop_ap_ibss,
4081
4082         .set_tim = iwl_mvm_set_tim,
4083
4084         .channel_switch = iwl_mvm_channel_switch,
4085         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4086         .post_channel_switch = iwl_mvm_post_channel_switch,
4087
4088         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4089         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4090         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4091
4092         .event_callback = iwl_mvm_mac_event_callback,
4093
4094         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4095
4096 #ifdef CONFIG_PM_SLEEP
4097         /* look at d3.c */
4098         .suspend = iwl_mvm_suspend,
4099         .resume = iwl_mvm_resume,
4100         .set_wakeup = iwl_mvm_set_wakeup,
4101         .set_rekey_data = iwl_mvm_set_rekey_data,
4102 #if IS_ENABLED(CONFIG_IPV6)
4103         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4104 #endif
4105         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4106 #endif
4107         .get_survey = iwl_mvm_mac_get_survey,
4108         .sta_statistics = iwl_mvm_mac_sta_statistics,
4109 };