drivers/net/wireless/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  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
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  21  * along with this program; if not, write to the Free Software
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  31  *
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
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  39  * modification, are permitted provided that the following conditions
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  43  *    notice, this list of conditions and the following disclaimer.
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  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <linux/devcoredump.h>
  73 #include <net/mac80211.h>
  74 #include <net/ieee80211_radiotap.h>
  75 #include <net/tcp.h>
  76
  77 #include "iwl-op-mode.h"
  78 #include "iwl-io.h"
  79 #include "mvm.h"
  80 #include "sta.h"
  81 #include "time-event.h"
  82 #include "iwl-eeprom-parse.h"
  83 #include "iwl-phy-db.h"
  84 #include "testmode.h"
  85 #include "iwl-fw-error-dump.h"
  86 #include "iwl-prph.h"
  87 #include "iwl-csr.h"
  88 #include "iwl-nvm-parse.h"
  89
  90 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  91         {
  92                 .max = 1,
  93                 .types = BIT(NL80211_IFTYPE_STATION),
  94         },
  95         {
  96                 .max = 1,
  97                 .types = BIT(NL80211_IFTYPE_AP) |
  98                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  99                         BIT(NL80211_IFTYPE_P2P_GO),
 100         },
 101         {
 102                 .max = 1,
 103                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 104         },
 105 };
 106
 107 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 108         {
 109                 .num_different_channels = 2,
 110                 .max_interfaces = 3,
 111                 .limits = iwl_mvm_limits,
 112                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 113         },
 114 };
 115
 116 #ifdef CONFIG_PM_SLEEP
 117 static const struct nl80211_wowlan_tcp_data_token_feature
 118 iwl_mvm_wowlan_tcp_token_feature = {
 119         .min_len = 0,
 120         .max_len = 255,
 121         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 122 };
 123
 124 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 125         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 126         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 127                             sizeof(struct ethhdr) -
 128                             sizeof(struct iphdr) -
 129                             sizeof(struct tcphdr),
 130         .data_interval_max = 65535, /* __le16 in API */
 131         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 132                             sizeof(struct ethhdr) -
 133                             sizeof(struct iphdr) -
 134                             sizeof(struct tcphdr),
 135         .seq = true,
 136 };
 137 #endif
 138
 139 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 140 /*
 141  * Use the reserved field to indicate magic values.
 142  * these values will only be used internally by the driver,
 143  * and won't make it to the fw (reserved will be 0).
 144  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 145  *      be the vif's ip address. in case there is not a single
 146  *      ip address (0, or more than 1), this attribute will
 147  *      be skipped.
 148  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 149  *      the LSB bytes of the vif's mac address
 150  */
 151 enum {
 152         BC_FILTER_MAGIC_NONE = 0,
 153         BC_FILTER_MAGIC_IP,
 154         BC_FILTER_MAGIC_MAC,
 155 };
 156
 157 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 158         {
 159                 /* arp */
 160                 .discard = 0,
 161                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 162                 .attrs = {
 163                         {
 164                                 /* frame type - arp, hw type - ethernet */
 165                                 .offset_type =
 166                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 167                                 .offset = sizeof(rfc1042_header),
 168                                 .val = cpu_to_be32(0x08060001),
 169                                 .mask = cpu_to_be32(0xffffffff),
 170                         },
 171                         {
 172                                 /* arp dest ip */
 173                                 .offset_type =
 174                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 175                                 .offset = sizeof(rfc1042_header) + 2 +
 176                                           sizeof(struct arphdr) +
 177                                           ETH_ALEN + sizeof(__be32) +
 178                                           ETH_ALEN,
 179                                 .mask = cpu_to_be32(0xffffffff),
 180                                 /* mark it as special field */
 181                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 182                         },
 183                 },
 184         },
 185         {
 186                 /* dhcp offer bcast */
 187                 .discard = 0,
 188                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 189                 .attrs = {
 190                         {
 191                                 /* udp dest port - 68 (bootp client)*/
 192                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 193                                 .offset = offsetof(struct udphdr, dest),
 194                                 .val = cpu_to_be32(0x00440000),
 195                                 .mask = cpu_to_be32(0xffff0000),
 196                         },
 197                         {
 198                                 /* dhcp - lsb bytes of client hw address */
 199                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 200                                 .offset = 38,
 201                                 .mask = cpu_to_be32(0xffffffff),
 202                                 /* mark it as special field */
 203                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 204                         },
 205                 },
 206         },
 207         /* last filter must be empty */
 208         {},
 209 };
 210 #endif
 211
 212 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 213 {
 214         if (!iwl_mvm_is_d0i3_supported(mvm))
 215                 return;
 216
 217         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 218         spin_lock_bh(&mvm->refs_lock);
 219         mvm->refs[ref_type]++;
 220         spin_unlock_bh(&mvm->refs_lock);
 221         iwl_trans_ref(mvm->trans);
 222 }
 223
 224 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 225 {
 226         if (!iwl_mvm_is_d0i3_supported(mvm))
 227                 return;
 228
 229         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 230         spin_lock_bh(&mvm->refs_lock);
 231         WARN_ON(!mvm->refs[ref_type]--);
 232         spin_unlock_bh(&mvm->refs_lock);
 233         iwl_trans_unref(mvm->trans);
 234 }
 235
 236 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 237                                      enum iwl_mvm_ref_type except_ref)
 238 {
 239         int i, j;
 240
 241         if (!iwl_mvm_is_d0i3_supported(mvm))
 242                 return;
 243
 244         spin_lock_bh(&mvm->refs_lock);
 245         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 246                 if (except_ref == i || !mvm->refs[i])
 247                         continue;
 248
 249                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 250                               i, mvm->refs[i]);
 251                 for (j = 0; j < mvm->refs[i]; j++)
 252                         iwl_trans_unref(mvm->trans);
 253                 mvm->refs[i] = 0;
 254         }
 255         spin_unlock_bh(&mvm->refs_lock);
 256 }
 257
 258 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 259 {
 260         int i;
 261         bool taken = false;
 262
 263         if (!iwl_mvm_is_d0i3_supported(mvm))
 264                 return true;
 265
 266         spin_lock_bh(&mvm->refs_lock);
 267         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 268                 if (mvm->refs[i]) {
 269                         taken = true;
 270                         break;
 271                 }
 272         }
 273         spin_unlock_bh(&mvm->refs_lock);
 274
 275         return taken;
 276 }
 277
 278 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 279 {
 280         iwl_mvm_ref(mvm, ref_type);
 281
 282         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 283                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 284                                 HZ)) {
 285                 WARN_ON_ONCE(1);
 286                 iwl_mvm_unref(mvm, ref_type);
 287                 return -EIO;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 294 {
 295         int i;
 296
 297         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 298         for (i = 0; i < NUM_PHY_CTX; i++) {
 299                 mvm->phy_ctxts[i].id = i;
 300                 mvm->phy_ctxts[i].ref = 0;
 301         }
 302 }
 303
 304 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 305                                                   const char *alpha2,
 306                                                   enum iwl_mcc_source src_id,
 307                                                   bool *changed)
 308 {
 309         struct ieee80211_regdomain *regd = NULL;
 310         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 311         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 312         struct iwl_mcc_update_resp *resp;
 313
 314         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 315
 316         lockdep_assert_held(&mvm->mutex);
 317
 318         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 319         if (IS_ERR_OR_NULL(resp)) {
 320                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 321                               PTR_ERR_OR_ZERO(resp));
 322                 goto out;
 323         }
 324
 325         if (changed)
 326                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 327
 328         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 329                                       __le32_to_cpu(resp->n_channels),
 330                                       resp->channels,
 331                                       __le16_to_cpu(resp->mcc));
 332         /* Store the return source id */
 333         src_id = resp->source_id;
 334         kfree(resp);
 335         if (IS_ERR_OR_NULL(regd)) {
 336                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 337                               PTR_ERR_OR_ZERO(regd));
 338                 goto out;
 339         }
 340
 341         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 342                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 343         mvm->lar_regdom_set = true;
 344         mvm->mcc_src = src_id;
 345
 346 out:
 347         return regd;
 348 }
 349
 350 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 351 {
 352         bool changed;
 353         struct ieee80211_regdomain *regd;
 354
 355         if (!iwl_mvm_is_lar_supported(mvm))
 356                 return;
 357
 358         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 359         if (!IS_ERR_OR_NULL(regd)) {
 360                 /* only update the regulatory core if changed */
 361                 if (changed)
 362                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 363
 364                 kfree(regd);
 365         }
 366 }
 367
 368 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 369                                                           bool *changed)
 370 {
 371         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 372                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 373                                      MCC_SOURCE_GET_CURRENT :
 374                                      MCC_SOURCE_OLD_FW, changed);
 375 }
 376
 377 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 378 {
 379         enum iwl_mcc_source used_src;
 380         struct ieee80211_regdomain *regd;
 381         int ret;
 382         bool changed;
 383         const struct ieee80211_regdomain *r =
 384                         rtnl_dereference(mvm->hw->wiphy->regd);
 385
 386         if (!r)
 387                 return -ENOENT;
 388
 389         /* save the last source in case we overwrite it below */
 390         used_src = mvm->mcc_src;
 391         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 392                 /* Notify the firmware we support wifi location updates */
 393                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 394                 if (!IS_ERR_OR_NULL(regd))
 395                         kfree(regd);
 396         }
 397
 398         /* Now set our last stored MCC and source */
 399         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 400                                      &changed);
 401         if (IS_ERR_OR_NULL(regd))
 402                 return -EIO;
 403
 404         /* update cfg80211 if the regdomain was changed */
 405         if (changed)
 406                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 407         else
 408                 ret = 0;
 409
 410         kfree(regd);
 411         return ret;
 412 }
 413
 414 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 415 {
 416         struct ieee80211_hw *hw = mvm->hw;
 417         int num_mac, ret, i;
 418         static const u32 mvm_ciphers[] = {
 419                 WLAN_CIPHER_SUITE_WEP40,
 420                 WLAN_CIPHER_SUITE_WEP104,
 421                 WLAN_CIPHER_SUITE_TKIP,
 422                 WLAN_CIPHER_SUITE_CCMP,
 423         };
 424
 425         /* Tell mac80211 our characteristics */
 426         ieee80211_hw_set(hw, SIGNAL_DBM);
 427         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 428         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 429         ieee80211_hw_set(hw, QUEUE_CONTROL);
 430         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 431         ieee80211_hw_set(hw, SUPPORTS_PS);
 432         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 433         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 434         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 435         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 436         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 437         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 438         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 439
 440         hw->queues = mvm->first_agg_queue;
 441         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 442         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 443                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 444         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 445                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 446         hw->rate_control_algorithm = "iwl-mvm-rs";
 447         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 448         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 449
 450         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
 451         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 452         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 453         hw->wiphy->cipher_suites = mvm->ciphers;
 454
 455         /*
 456          * Enable 11w if advertised by firmware and software crypto
 457          * is not enabled (as the firmware will interpret some mgmt
 458          * packets, so enabling it with software crypto isn't safe)
 459          */
 460         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 461             !iwlwifi_mod_params.sw_crypto) {
 462                 ieee80211_hw_set(hw, MFP_CAPABLE);
 463                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 464                         WLAN_CIPHER_SUITE_AES_CMAC;
 465                 hw->wiphy->n_cipher_suites++;
 466         }
 467
 468         /* currently FW API supports only one optional cipher scheme */
 469         if (mvm->fw->cs[0].cipher) {
 470                 mvm->hw->n_cipher_schemes = 1;
 471                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 472                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 473                         mvm->fw->cs[0].cipher;
 474                 hw->wiphy->n_cipher_suites++;
 475         }
 476
 477         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 478         hw->wiphy->features |=
 479                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 480                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 481                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 482
 483         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 484         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 485         hw->chanctx_data_size = sizeof(u16);
 486
 487         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 488                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 489                 BIT(NL80211_IFTYPE_AP) |
 490                 BIT(NL80211_IFTYPE_P2P_GO) |
 491                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 492                 BIT(NL80211_IFTYPE_ADHOC);
 493
 494         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 495         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 496         if (iwl_mvm_is_lar_supported(mvm))
 497                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 498         else
 499                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 500                                                REGULATORY_DISABLE_BEACON_HINTS;
 501
 502         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 503                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 504
 505         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 506
 507         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 508         hw->wiphy->n_iface_combinations =
 509                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 510
 511         hw->wiphy->max_remain_on_channel_duration = 10000;
 512         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 513         /* we can compensate an offset of up to 3 channels = 15 MHz */
 514         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 515
 516         /* Extract MAC address */
 517         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 518         hw->wiphy->addresses = mvm->addresses;
 519         hw->wiphy->n_addresses = 1;
 520
 521         /* Extract additional MAC addresses if available */
 522         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 523                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 524
 525         for (i = 1; i < num_mac; i++) {
 526                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 527                        ETH_ALEN);
 528                 mvm->addresses[i].addr[5]++;
 529                 hw->wiphy->n_addresses++;
 530         }
 531
 532         iwl_mvm_reset_phy_ctxts(mvm);
 533
 534         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 535
 536         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 537
 538         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 539         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 540                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 541
 542         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 543                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 544         else
 545                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 546
 547         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 548                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 549                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 550         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
 551                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 552                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 553
 554                 if (fw_has_capa(&mvm->fw->ucode_capa,
 555                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 556                     fw_has_api(&mvm->fw->ucode_capa,
 557                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 558                         hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
 559                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 560         }
 561
 562         hw->wiphy->hw_version = mvm->trans->hw_id;
 563
 564         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 565                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 566         else
 567                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 568
 569         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 570         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 571         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 572         /* we create the 802.11 header and zero length SSID IE. */
 573         hw->wiphy->max_sched_scan_ie_len =
 574                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 575         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 576         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 577
 578         /*
 579          * the firmware uses u8 for num of iterations, but 0xff is saved for
 580          * infinite loop, so the maximum number of iterations is actually 254.
 581          */
 582         hw->wiphy->max_sched_scan_plan_iterations = 254;
 583
 584         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 585                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 586                                NL80211_FEATURE_P2P_GO_OPPPS |
 587                                NL80211_FEATURE_DYNAMIC_SMPS |
 588                                NL80211_FEATURE_STATIC_SMPS |
 589                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 590
 591         if (fw_has_capa(&mvm->fw->ucode_capa,
 592                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 593                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 594         if (fw_has_capa(&mvm->fw->ucode_capa,
 595                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 596                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 597
 598         if (fw_has_capa(&mvm->fw->ucode_capa,
 599                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 600                 hw->wiphy->features |=
 601                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 602
 603         if (fw_has_capa(&mvm->fw->ucode_capa,
 604                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 605                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 606
 607         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 608
 609 #ifdef CONFIG_PM_SLEEP
 610         if (iwl_mvm_is_d0i3_supported(mvm) &&
 611             device_can_wakeup(mvm->trans->dev)) {
 612                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 613                 hw->wiphy->wowlan = &mvm->wowlan;
 614         }
 615
 616         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 617             mvm->trans->ops->d3_suspend &&
 618             mvm->trans->ops->d3_resume &&
 619             device_can_wakeup(mvm->trans->dev)) {
 620                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 621                                      WIPHY_WOWLAN_DISCONNECT |
 622                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 623                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 624                                      WIPHY_WOWLAN_NET_DETECT;
 625                 if (!iwlwifi_mod_params.sw_crypto)
 626                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 627                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 628                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 629
 630                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 631                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 632                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 633                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 634                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 635                 hw->wiphy->wowlan = &mvm->wowlan;
 636         }
 637 #endif
 638
 639 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 640         /* assign default bcast filtering configuration */
 641         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 642 #endif
 643
 644         ret = iwl_mvm_leds_init(mvm);
 645         if (ret)
 646                 return ret;
 647
 648         if (fw_has_capa(&mvm->fw->ucode_capa,
 649                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 650                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 651                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 652                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 653         }
 654
 655         if (fw_has_capa(&mvm->fw->ucode_capa,
 656                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 657                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 658                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 659         }
 660
 661         hw->netdev_features |= mvm->cfg->features;
 662         if (!iwl_mvm_is_csum_supported(mvm))
 663                 hw->netdev_features &= ~NETIF_F_RXCSUM;
 664
 665         ret = ieee80211_register_hw(mvm->hw);
 666         if (ret)
 667                 iwl_mvm_leds_exit(mvm);
 668
 669         return ret;
 670 }
 671
 672 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 673                              struct ieee80211_sta *sta,
 674                              struct sk_buff *skb)
 675 {
 676         struct iwl_mvm_sta *mvmsta;
 677         bool defer = false;
 678
 679         /*
 680          * double check the IN_D0I3 flag both before and after
 681          * taking the spinlock, in order to prevent taking
 682          * the spinlock when not needed.
 683          */
 684         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 685                 return false;
 686
 687         spin_lock(&mvm->d0i3_tx_lock);
 688         /*
 689          * testing the flag again ensures the skb dequeue
 690          * loop (on d0i3 exit) hasn't run yet.
 691          */
 692         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 693                 goto out;
 694
 695         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 696         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 697             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 698                 goto out;
 699
 700         __skb_queue_tail(&mvm->d0i3_tx, skb);
 701         ieee80211_stop_queues(mvm->hw);
 702
 703         /* trigger wakeup */
 704         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 705         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 706
 707         defer = true;
 708 out:
 709         spin_unlock(&mvm->d0i3_tx_lock);
 710         return defer;
 711 }
 712
 713 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 714                            struct ieee80211_tx_control *control,
 715                            struct sk_buff *skb)
 716 {
 717         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 718         struct ieee80211_sta *sta = control->sta;
 719         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 720         struct ieee80211_hdr *hdr = (void *)skb->data;
 721
 722         if (iwl_mvm_is_radio_killed(mvm)) {
 723                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 724                 goto drop;
 725         }
 726
 727         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 728             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 729             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 730                 goto drop;
 731
 732         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 733         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 734                      ieee80211_is_mgmt(hdr->frame_control) &&
 735                      !ieee80211_is_deauth(hdr->frame_control) &&
 736                      !ieee80211_is_disassoc(hdr->frame_control) &&
 737                      !ieee80211_is_action(hdr->frame_control)))
 738                 sta = NULL;
 739
 740         if (sta) {
 741                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 742                         return;
 743                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 744                         goto drop;
 745                 return;
 746         }
 747
 748         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 749                 goto drop;
 750         return;
 751  drop:
 752         ieee80211_free_txskb(hw, skb);
 753 }
 754
 755 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 756 {
 757         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 758                 return false;
 759         return true;
 760 }
 761
 762 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 763 {
 764         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 765                 return false;
 766         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 767                 return true;
 768
 769         /* enabled by default */
 770         return true;
 771 }
 772
 773 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 774         do {                                                    \
 775                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 776                         break;                                  \
 777                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 778         } while (0)
 779
 780 static void
 781 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 782                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 783                             enum ieee80211_ampdu_mlme_action action)
 784 {
 785         struct iwl_fw_dbg_trigger_tlv *trig;
 786         struct iwl_fw_dbg_trigger_ba *ba_trig;
 787
 788         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 789                 return;
 790
 791         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 792         ba_trig = (void *)trig->data;
 793
 794         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 795                 return;
 796
 797         switch (action) {
 798         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 799                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 800                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 801
 802                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 803                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 804                                  sta->addr, tid, tid_data->ssn);
 805                 break;
 806                 }
 807         case IEEE80211_AMPDU_TX_STOP_CONT:
 808                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 809                                  "TX AGG STOP: MAC %pM tid %d\n",
 810                                  sta->addr, tid);
 811                 break;
 812         case IEEE80211_AMPDU_RX_START:
 813                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 814                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 815                                  sta->addr, tid, rx_ba_ssn);
 816                 break;
 817         case IEEE80211_AMPDU_RX_STOP:
 818                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 819                                  "RX AGG STOP: MAC %pM tid %d\n",
 820                                  sta->addr, tid);
 821                 break;
 822         default:
 823                 break;
 824         }
 825 }
 826
 827 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 828                                     struct ieee80211_vif *vif,
 829                                     enum ieee80211_ampdu_mlme_action action,
 830                                     struct ieee80211_sta *sta, u16 tid,
 831                                     u16 *ssn, u8 buf_size, bool amsdu)
 832 {
 833         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 834         int ret;
 835         bool tx_agg_ref = false;
 836
 837         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 838                      sta->addr, tid, action);
 839
 840         if (!(mvm->nvm_data->sku_cap_11n_enable))
 841                 return -EACCES;
 842
 843         /* return from D0i3 before starting a new Tx aggregation */
 844         switch (action) {
 845         case IEEE80211_AMPDU_TX_START:
 846         case IEEE80211_AMPDU_TX_STOP_CONT:
 847         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 848         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 849         case IEEE80211_AMPDU_TX_OPERATIONAL:
 850                 /*
 851                  * for tx start, wait synchronously until D0i3 exit to
 852                  * get the correct sequence number for the tid.
 853                  * additionally, some other ampdu actions use direct
 854                  * target access, which is not handled automatically
 855                  * by the trans layer (unlike commands), so wait for
 856                  * d0i3 exit in these cases as well.
 857                  */
 858                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 859                 if (ret)
 860                         return ret;
 861
 862                 tx_agg_ref = true;
 863                 break;
 864         default:
 865                 break;
 866         }
 867
 868         mutex_lock(&mvm->mutex);
 869
 870         switch (action) {
 871         case IEEE80211_AMPDU_RX_START:
 872                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 873                         ret = -EINVAL;
 874                         break;
 875                 }
 876                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 877                 break;
 878         case IEEE80211_AMPDU_RX_STOP:
 879                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 880                 break;
 881         case IEEE80211_AMPDU_TX_START:
 882                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 883                         ret = -EINVAL;
 884                         break;
 885                 }
 886                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 887                 break;
 888         case IEEE80211_AMPDU_TX_STOP_CONT:
 889                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 890                 break;
 891         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 892         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 893                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 894                 break;
 895         case IEEE80211_AMPDU_TX_OPERATIONAL:
 896                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 897                 break;
 898         default:
 899                 WARN_ON_ONCE(1);
 900                 ret = -EINVAL;
 901                 break;
 902         }
 903
 904         if (!ret) {
 905                 u16 rx_ba_ssn = 0;
 906
 907                 if (action == IEEE80211_AMPDU_RX_START)
 908                         rx_ba_ssn = *ssn;
 909
 910                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 911                                             rx_ba_ssn, action);
 912         }
 913         mutex_unlock(&mvm->mutex);
 914
 915         /*
 916          * If the tid is marked as started, we won't use it for offloaded
 917          * traffic on the next D0i3 entry. It's safe to unref.
 918          */
 919         if (tx_agg_ref)
 920                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 921
 922         return ret;
 923 }
 924
 925 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 926                                      struct ieee80211_vif *vif)
 927 {
 928         struct iwl_mvm *mvm = data;
 929         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 930
 931         mvmvif->uploaded = false;
 932         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 933
 934         spin_lock_bh(&mvm->time_event_lock);
 935         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 936         spin_unlock_bh(&mvm->time_event_lock);
 937
 938         mvmvif->phy_ctxt = NULL;
 939         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 940 }
 941
 942 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 943                                      const void *data, size_t datalen)
 944 {
 945         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 946         ssize_t bytes_read;
 947         ssize_t bytes_read_trans;
 948
 949         if (offset < dump_ptrs->op_mode_len) {
 950                 bytes_read = min_t(ssize_t, count,
 951                                    dump_ptrs->op_mode_len - offset);
 952                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 953                        bytes_read);
 954                 offset += bytes_read;
 955                 count -= bytes_read;
 956
 957                 if (count == 0)
 958                         return bytes_read;
 959         } else {
 960                 bytes_read = 0;
 961         }
 962
 963         if (!dump_ptrs->trans_ptr)
 964                 return bytes_read;
 965
 966         offset -= dump_ptrs->op_mode_len;
 967         bytes_read_trans = min_t(ssize_t, count,
 968                                  dump_ptrs->trans_ptr->len - offset);
 969         memcpy(buffer + bytes_read,
 970                (u8 *)dump_ptrs->trans_ptr->data + offset,
 971                bytes_read_trans);
 972
 973         return bytes_read + bytes_read_trans;
 974 }
 975
 976 static void iwl_mvm_free_coredump(const void *data)
 977 {
 978         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 979
 980         vfree(fw_error_dump->op_mode_ptr);
 981         vfree(fw_error_dump->trans_ptr);
 982         kfree(fw_error_dump);
 983 }
 984
 985 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 986                                struct iwl_fw_error_dump_data **dump_data)
 987 {
 988         struct iwl_fw_error_dump_fifo *fifo_hdr;
 989         u32 *fifo_data;
 990         u32 fifo_len;
 991         unsigned long flags;
 992         int i, j;
 993
 994         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 995                 return;
 996
 997         /* Pull RXF data from all RXFs */
 998         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
 999                 /*
1000                  * Keep aside the additional offset that might be needed for
1001                  * next RXF
1002                  */
1003                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
1004
1005                 fifo_hdr = (void *)(*dump_data)->data;
1006                 fifo_data = (void *)fifo_hdr->data;
1007                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
1008
1009                 /* No need to try to read the data if the length is 0 */
1010                 if (fifo_len == 0)
1011                         continue;
1012
1013                 /* Add a TLV for the RXF */
1014                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
1015                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1016
1017                 fifo_hdr->fifo_num = cpu_to_le32(i);
1018                 fifo_hdr->available_bytes =
1019                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1020                                                         RXF_RD_D_SPACE +
1021                                                         offset_diff));
1022                 fifo_hdr->wr_ptr =
1023                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1024                                                         RXF_RD_WR_PTR +
1025                                                         offset_diff));
1026                 fifo_hdr->rd_ptr =
1027                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1028                                                         RXF_RD_RD_PTR +
1029                                                         offset_diff));
1030                 fifo_hdr->fence_ptr =
1031                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1032                                                         RXF_RD_FENCE_PTR +
1033                                                         offset_diff));
1034                 fifo_hdr->fence_mode =
1035                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1036                                                         RXF_SET_FENCE_MODE +
1037                                                         offset_diff));
1038
1039                 /* Lock fence */
1040                 iwl_trans_write_prph(mvm->trans,
1041                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
1042                 /* Set fence pointer to the same place like WR pointer */
1043                 iwl_trans_write_prph(mvm->trans,
1044                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
1045                 /* Set fence offset */
1046                 iwl_trans_write_prph(mvm->trans,
1047                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
1048                                      0x0);
1049
1050                 /* Read FIFO */
1051                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1052                 for (j = 0; j < fifo_len; j++)
1053                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1054                                                          RXF_FIFO_RD_FENCE_INC +
1055                                                          offset_diff);
1056                 *dump_data = iwl_fw_error_next_data(*dump_data);
1057         }
1058
1059         /* Pull TXF data from all TXFs */
1060         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
1061                 /* Mark the number of TXF we're pulling now */
1062                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
1063
1064                 fifo_hdr = (void *)(*dump_data)->data;
1065                 fifo_data = (void *)fifo_hdr->data;
1066                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
1067
1068                 /* No need to try to read the data if the length is 0 */
1069                 if (fifo_len == 0)
1070                         continue;
1071
1072                 /* Add a TLV for the FIFO */
1073                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
1074                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1075
1076                 fifo_hdr->fifo_num = cpu_to_le32(i);
1077                 fifo_hdr->available_bytes =
1078                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1079                                                         TXF_FIFO_ITEM_CNT));
1080                 fifo_hdr->wr_ptr =
1081                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1082                                                         TXF_WR_PTR));
1083                 fifo_hdr->rd_ptr =
1084                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1085                                                         TXF_RD_PTR));
1086                 fifo_hdr->fence_ptr =
1087                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1088                                                         TXF_FENCE_PTR));
1089                 fifo_hdr->fence_mode =
1090                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1091                                                         TXF_LOCK_FENCE));
1092
1093                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
1094                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
1095                                      TXF_WR_PTR);
1096
1097                 /* Dummy-read to advance the read pointer to the head */
1098                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
1099
1100                 /* Read FIFO */
1101                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1102                 for (j = 0; j < fifo_len; j++)
1103                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1104                                                           TXF_READ_MODIFY_DATA);
1105                 *dump_data = iwl_fw_error_next_data(*dump_data);
1106         }
1107
1108         iwl_trans_release_nic_access(mvm->trans, &flags);
1109 }
1110
1111 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1112 {
1113         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1114             !mvm->fw_dump_desc)
1115                 return;
1116
1117         kfree(mvm->fw_dump_desc);
1118         mvm->fw_dump_desc = NULL;
1119 }
1120
1121 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1122 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1123
1124 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1125 {
1126         struct iwl_fw_error_dump_file *dump_file;
1127         struct iwl_fw_error_dump_data *dump_data;
1128         struct iwl_fw_error_dump_info *dump_info;
1129         struct iwl_fw_error_dump_mem *dump_mem;
1130         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1131         struct iwl_mvm_dump_ptrs *fw_error_dump;
1132         u32 sram_len, sram_ofs;
1133         u32 file_len, fifo_data_len = 0;
1134         u32 smem_len = mvm->cfg->smem_len;
1135         u32 sram2_len = mvm->cfg->dccm2_len;
1136         bool monitor_dump_only = false;
1137
1138         lockdep_assert_held(&mvm->mutex);
1139
1140         /* there's no point in fw dump if the bus is dead */
1141         if (test_bit(STATUS_TRANS_DEAD, &mvm->trans->status)) {
1142                 IWL_ERR(mvm, "Skip fw error dump since bus is dead\n");
1143                 return;
1144         }
1145
1146         if (mvm->fw_dump_trig &&
1147             mvm->fw_dump_trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
1148                 monitor_dump_only = true;
1149
1150         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1151         if (!fw_error_dump)
1152                 return;
1153
1154         /* SRAM - include stack CCM if driver knows the values for it */
1155         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1156                 const struct fw_img *img;
1157
1158                 img = &mvm->fw->img[mvm->cur_ucode];
1159                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1160                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1161         } else {
1162                 sram_ofs = mvm->cfg->dccm_offset;
1163                 sram_len = mvm->cfg->dccm_len;
1164         }
1165
1166         /* reading RXF/TXF sizes */
1167         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1168                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1169                 int i;
1170
1171                 fifo_data_len = 0;
1172
1173                 /* Count RXF size */
1174                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1175                         if (!mem_cfg->rxfifo_size[i])
1176                                 continue;
1177
1178                         /* Add header info */
1179                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1180                                          sizeof(*dump_data) +
1181                                          sizeof(struct iwl_fw_error_dump_fifo);
1182                 }
1183
1184                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1185                         if (!mem_cfg->txfifo_size[i])
1186                                 continue;
1187
1188                         /* Add header info */
1189                         fifo_data_len += mem_cfg->txfifo_size[i] +
1190                                          sizeof(*dump_data) +
1191                                          sizeof(struct iwl_fw_error_dump_fifo);
1192                 }
1193         }
1194
1195         file_len = sizeof(*dump_file) +
1196                    sizeof(*dump_data) * 2 +
1197                    sram_len + sizeof(*dump_mem) +
1198                    fifo_data_len +
1199                    sizeof(*dump_info);
1200
1201         /* Make room for the SMEM, if it exists */
1202         if (smem_len)
1203                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1204
1205         /* Make room for the secondary SRAM, if it exists */
1206         if (sram2_len)
1207                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1208
1209         /* Make room for fw's virtual image pages, if it exists */
1210         if (mvm->fw->img[mvm->cur_ucode].paging_mem_size)
1211                 file_len += mvm->num_of_paging_blk *
1212                         (sizeof(*dump_data) +
1213                          sizeof(struct iwl_fw_error_dump_paging) +
1214                          PAGING_BLOCK_SIZE);
1215
1216         /* If we only want a monitor dump, reset the file length */
1217         if (monitor_dump_only) {
1218                 file_len = sizeof(*dump_file) + sizeof(*dump_data) +
1219                            sizeof(*dump_info);
1220         }
1221
1222         /*
1223          * In 8000 HW family B-step include the ICCM (which resides separately)
1224          */
1225         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1226             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1227                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1228                             IWL8260_ICCM_LEN;
1229
1230         if (mvm->fw_dump_desc)
1231                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1232                             mvm->fw_dump_desc->len;
1233
1234         dump_file = vzalloc(file_len);
1235         if (!dump_file) {
1236                 kfree(fw_error_dump);
1237                 iwl_mvm_free_fw_dump_desc(mvm);
1238                 return;
1239         }
1240
1241         fw_error_dump->op_mode_ptr = dump_file;
1242
1243         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1244         dump_data = (void *)dump_file->data;
1245
1246         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1247         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1248         dump_info = (void *) dump_data->data;
1249         dump_info->device_family =
1250                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1251                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1252                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1253         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1254         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1255                sizeof(dump_info->fw_human_readable));
1256         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1257                 sizeof(dump_info->dev_human_readable));
1258         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1259                 sizeof(dump_info->bus_human_readable));
1260
1261         dump_data = iwl_fw_error_next_data(dump_data);
1262         /* We only dump the FIFOs if the FW is in error state */
1263         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1264                 iwl_mvm_dump_fifos(mvm, &dump_data);
1265
1266         if (mvm->fw_dump_desc) {
1267                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1268                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1269                                              mvm->fw_dump_desc->len);
1270                 dump_trig = (void *)dump_data->data;
1271                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1272                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1273
1274                 /* now we can free this copy */
1275                 iwl_mvm_free_fw_dump_desc(mvm);
1276                 dump_data = iwl_fw_error_next_data(dump_data);
1277         }
1278
1279         /* In case we only want monitor dump, skip to dump trasport data */
1280         if (monitor_dump_only)
1281                 goto dump_trans_data;
1282
1283         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1284         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1285         dump_mem = (void *)dump_data->data;
1286         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1287         dump_mem->offset = cpu_to_le32(sram_ofs);
1288         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1289                                  sram_len);
1290
1291         if (smem_len) {
1292                 dump_data = iwl_fw_error_next_data(dump_data);
1293                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1294                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1295                 dump_mem = (void *)dump_data->data;
1296                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1297                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1298                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1299                                          dump_mem->data, smem_len);
1300         }
1301
1302         if (sram2_len) {
1303                 dump_data = iwl_fw_error_next_data(dump_data);
1304                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1305                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1306                 dump_mem = (void *)dump_data->data;
1307                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1308                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1309                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1310                                          dump_mem->data, sram2_len);
1311         }
1312
1313         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1314             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1315                 dump_data = iwl_fw_error_next_data(dump_data);
1316                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1317                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1318                                              sizeof(*dump_mem));
1319                 dump_mem = (void *)dump_data->data;
1320                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1321                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1322                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1323                                          dump_mem->data, IWL8260_ICCM_LEN);
1324         }
1325
1326         /* Dump fw's virtual image */
1327         if (mvm->fw->img[mvm->cur_ucode].paging_mem_size) {
1328                 u32 i;
1329
1330                 for (i = 1; i < mvm->num_of_paging_blk + 1; i++) {
1331                         struct iwl_fw_error_dump_paging *paging;
1332                         struct page *pages =
1333                                 mvm->fw_paging_db[i].fw_paging_block;
1334
1335                         dump_data = iwl_fw_error_next_data(dump_data);
1336                         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
1337                         dump_data->len = cpu_to_le32(sizeof(*paging) +
1338                                                      PAGING_BLOCK_SIZE);
1339                         paging = (void *)dump_data->data;
1340                         paging->index = cpu_to_le32(i);
1341                         memcpy(paging->data, page_address(pages),
1342                                PAGING_BLOCK_SIZE);
1343                 }
1344         }
1345
1346 dump_trans_data:
1347         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,
1348                                                        mvm->fw_dump_trig);
1349         fw_error_dump->op_mode_len = file_len;
1350         if (fw_error_dump->trans_ptr)
1351                 file_len += fw_error_dump->trans_ptr->len;
1352         dump_file->file_len = cpu_to_le32(file_len);
1353
1354         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1355                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1356
1357         mvm->fw_dump_trig = NULL;
1358         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1359 }
1360
1361 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1362         .trig_desc = {
1363                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1364         },
1365 };
1366
1367 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1368 {
1369         /* clear the D3 reconfig, we only need it to avoid dumping a
1370          * firmware coredump on reconfiguration, we shouldn't do that
1371          * on D3->D0 transition
1372          */
1373         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1374                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1375                 iwl_mvm_fw_error_dump(mvm);
1376         }
1377
1378         /* cleanup all stale references (scan, roc), but keep the
1379          * ucode_down ref until reconfig is complete
1380          */
1381         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1382
1383         iwl_trans_stop_device(mvm->trans);
1384
1385         mvm->scan_status = 0;
1386         mvm->ps_disabled = false;
1387         mvm->calibrating = false;
1388
1389         /* just in case one was running */
1390         ieee80211_remain_on_channel_expired(mvm->hw);
1391
1392         /*
1393          * cleanup all interfaces, even inactive ones, as some might have
1394          * gone down during the HW restart
1395          */
1396         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1397
1398         mvm->p2p_device_vif = NULL;
1399         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1400
1401         iwl_mvm_reset_phy_ctxts(mvm);
1402         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1403         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1404         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1405         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1406         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1407         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1408         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1409         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1410
1411         ieee80211_wake_queues(mvm->hw);
1412
1413         /* clear any stale d0i3 state */
1414         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1415
1416         mvm->vif_count = 0;
1417         mvm->rx_ba_sessions = 0;
1418         mvm->fw_dbg_conf = FW_DBG_INVALID;
1419
1420         /* keep statistics ticking */
1421         iwl_mvm_accu_radio_stats(mvm);
1422 }
1423
1424 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1425 {
1426         int ret;
1427
1428         lockdep_assert_held(&mvm->mutex);
1429
1430         /* Clean up some internal and mac80211 state on restart */
1431         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1432                 iwl_mvm_restart_cleanup(mvm);
1433
1434         ret = iwl_mvm_up(mvm);
1435
1436         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1437                 /* Something went wrong - we need to finish some cleanup
1438                  * that normally iwl_mvm_mac_restart_complete() below
1439                  * would do.
1440                  */
1441                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1442                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1443         }
1444
1445         return ret;
1446 }
1447
1448 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1449 {
1450         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1451         int ret;
1452
1453         /* Some hw restart cleanups must not hold the mutex */
1454         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1455                 /*
1456                  * Make sure we are out of d0i3. This is needed
1457                  * to make sure the reference accounting is correct
1458                  * (and there is no stale d0i3_exit_work).
1459                  */
1460                 wait_event_timeout(mvm->d0i3_exit_waitq,
1461                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1462                                              &mvm->status),
1463                                    HZ);
1464         }
1465
1466         mutex_lock(&mvm->mutex);
1467         ret = __iwl_mvm_mac_start(mvm);
1468         mutex_unlock(&mvm->mutex);
1469
1470         return ret;
1471 }
1472
1473 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1474 {
1475         int ret;
1476
1477         mutex_lock(&mvm->mutex);
1478
1479         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1480         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1481         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1482         if (ret)
1483                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1484                         ret);
1485
1486         /* allow transport/FW low power modes */
1487         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1488
1489         /*
1490          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1491          * of packets the FW sent out, so we must reconnect.
1492          */
1493         iwl_mvm_teardown_tdls_peers(mvm);
1494
1495         mutex_unlock(&mvm->mutex);
1496 }
1497
1498 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1499 {
1500         if (!iwl_mvm_is_d0i3_supported(mvm))
1501                 return;
1502
1503         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1504                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1505                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1506                                                   &mvm->status),
1507                                         HZ))
1508                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1509 }
1510
1511 static void
1512 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1513                               enum ieee80211_reconfig_type reconfig_type)
1514 {
1515         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1516
1517         switch (reconfig_type) {
1518         case IEEE80211_RECONFIG_TYPE_RESTART:
1519                 iwl_mvm_restart_complete(mvm);
1520                 break;
1521         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1522                 iwl_mvm_resume_complete(mvm);
1523                 break;
1524         }
1525 }
1526
1527 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1528 {
1529         lockdep_assert_held(&mvm->mutex);
1530
1531         /* firmware counters are obviously reset now, but we shouldn't
1532          * partially track so also clear the fw_reset_accu counters.
1533          */
1534         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1535
1536         /*
1537          * Disallow low power states when the FW is down by taking
1538          * the UCODE_DOWN ref. in case of ongoing hw restart the
1539          * ref is already taken, so don't take it again.
1540          */
1541         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1542                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1543
1544         /* async_handlers_wk is now blocked */
1545
1546         /*
1547          * The work item could be running or queued if the
1548          * ROC time event stops just as we get here.
1549          */
1550         flush_work(&mvm->roc_done_wk);
1551
1552         iwl_trans_stop_device(mvm->trans);
1553
1554         iwl_mvm_async_handlers_purge(mvm);
1555         /* async_handlers_list is empty and will stay empty: HW is stopped */
1556
1557         /* the fw is stopped, the aux sta is dead: clean up driver state */
1558         iwl_mvm_del_aux_sta(mvm);
1559
1560         /*
1561          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1562          * won't be called in this case).
1563          * But make sure to cleanup interfaces that have gone down before/during
1564          * HW restart was requested.
1565          */
1566         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1567                 ieee80211_iterate_interfaces(mvm->hw, 0,
1568                                              iwl_mvm_cleanup_iterator, mvm);
1569
1570         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1571          * make sure there's nothing left there and warn if any is found.
1572          */
1573         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1574                 int i;
1575
1576                 for (i = 0; i < mvm->max_scans; i++) {
1577                         if (WARN_ONCE(mvm->scan_uid_status[i],
1578                                       "UMAC scan UID %d status was not cleaned\n",
1579                                       i))
1580                                 mvm->scan_uid_status[i] = 0;
1581                 }
1582         }
1583
1584         mvm->ucode_loaded = false;
1585 }
1586
1587 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1588 {
1589         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1590
1591         flush_work(&mvm->d0i3_exit_work);
1592         flush_work(&mvm->async_handlers_wk);
1593         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1594         iwl_mvm_free_fw_dump_desc(mvm);
1595
1596         mutex_lock(&mvm->mutex);
1597         __iwl_mvm_mac_stop(mvm);
1598         mutex_unlock(&mvm->mutex);
1599
1600         /*
1601          * The worker might have been waiting for the mutex, let it run and
1602          * discover that its list is now empty.
1603          */
1604         cancel_work_sync(&mvm->async_handlers_wk);
1605 }
1606
1607 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1608 {
1609         u16 i;
1610
1611         lockdep_assert_held(&mvm->mutex);
1612
1613         for (i = 0; i < NUM_PHY_CTX; i++)
1614                 if (!mvm->phy_ctxts[i].ref)
1615                         return &mvm->phy_ctxts[i];
1616
1617         IWL_ERR(mvm, "No available PHY context\n");
1618         return NULL;
1619 }
1620
1621 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1622                                 s16 tx_power)
1623 {
1624         struct iwl_dev_tx_power_cmd cmd = {
1625                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1626                 .v2.mac_context_id =
1627                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1628                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1629         };
1630         int len = sizeof(cmd);
1631
1632         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1633                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1634
1635         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1636                 len = sizeof(cmd.v2);
1637
1638         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1639 }
1640
1641 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1642                                      struct ieee80211_vif *vif)
1643 {
1644         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1645         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1646         int ret;
1647
1648         mvmvif->mvm = mvm;
1649
1650         /*
1651          * make sure D0i3 exit is completed, otherwise a target access
1652          * during tx queue configuration could be done when still in
1653          * D0i3 state.
1654          */
1655         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1656         if (ret)
1657                 return ret;
1658
1659         /*
1660          * Not much to do here. The stack will not allow interface
1661          * types or combinations that we didn't advertise, so we
1662          * don't really have to check the types.
1663          */
1664
1665         mutex_lock(&mvm->mutex);
1666
1667         /* make sure that beacon statistics don't go backwards with FW reset */
1668         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1669                 mvmvif->beacon_stats.accu_num_beacons +=
1670                         mvmvif->beacon_stats.num_beacons;
1671
1672         /* Allocate resources for the MAC context, and add it to the fw  */
1673         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1674         if (ret)
1675                 goto out_unlock;
1676
1677         /* Counting number of interfaces is needed for legacy PM */
1678         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1679                 mvm->vif_count++;
1680
1681         /*
1682          * The AP binding flow can be done only after the beacon
1683          * template is configured (which happens only in the mac80211
1684          * start_ap() flow), and adding the broadcast station can happen
1685          * only after the binding.
1686          * In addition, since modifying the MAC before adding a bcast
1687          * station is not allowed by the FW, delay the adding of MAC context to
1688          * the point where we can also add the bcast station.
1689          * In short: there's not much we can do at this point, other than
1690          * allocating resources :)
1691          */
1692         if (vif->type == NL80211_IFTYPE_AP ||
1693             vif->type == NL80211_IFTYPE_ADHOC) {
1694                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1695                 if (ret) {
1696                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1697                         goto out_release;
1698                 }
1699
1700                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1701                 goto out_unlock;
1702         }
1703
1704         mvmvif->features |= hw->netdev_features;
1705
1706         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1707         if (ret)
1708                 goto out_release;
1709
1710         ret = iwl_mvm_power_update_mac(mvm);
1711         if (ret)
1712                 goto out_remove_mac;
1713
1714         /* beacon filtering */
1715         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1716         if (ret)
1717                 goto out_remove_mac;
1718
1719         if (!mvm->bf_allowed_vif &&
1720             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1721                 mvm->bf_allowed_vif = mvmvif;
1722                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1723                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1724         }
1725
1726         /*
1727          * P2P_DEVICE interface does not have a channel context assigned to it,
1728          * so a dedicated PHY context is allocated to it and the corresponding
1729          * MAC context is bound to it at this stage.
1730          */
1731         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1732
1733                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1734                 if (!mvmvif->phy_ctxt) {
1735                         ret = -ENOSPC;
1736                         goto out_free_bf;
1737                 }
1738
1739                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1740                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1741                 if (ret)
1742                         goto out_unref_phy;
1743
1744                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1745                 if (ret)
1746                         goto out_unbind;
1747
1748                 /* Save a pointer to p2p device vif, so it can later be used to
1749                  * update the p2p device MAC when a GO is started/stopped */
1750                 mvm->p2p_device_vif = vif;
1751         }
1752
1753         iwl_mvm_vif_dbgfs_register(mvm, vif);
1754         goto out_unlock;
1755
1756  out_unbind:
1757         iwl_mvm_binding_remove_vif(mvm, vif);
1758  out_unref_phy:
1759         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1760  out_free_bf:
1761         if (mvm->bf_allowed_vif == mvmvif) {
1762                 mvm->bf_allowed_vif = NULL;
1763                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1764                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1765         }
1766  out_remove_mac:
1767         mvmvif->phy_ctxt = NULL;
1768         iwl_mvm_mac_ctxt_remove(mvm, vif);
1769  out_release:
1770         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1771                 mvm->vif_count--;
1772
1773         iwl_mvm_mac_ctxt_release(mvm, vif);
1774  out_unlock:
1775         mutex_unlock(&mvm->mutex);
1776
1777         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1778
1779         return ret;
1780 }
1781
1782 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1783                                         struct ieee80211_vif *vif)
1784 {
1785         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1786
1787         if (tfd_msk) {
1788                 /*
1789                  * mac80211 first removes all the stations of the vif and
1790                  * then removes the vif. When it removes a station it also
1791                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1792                  * of all the stations of this vif are closed, and the queues
1793                  * of these AMPDU sessions are properly closed.
1794                  * We still need to take care of the shared queues of the vif.
1795                  * Flush them here.
1796                  */
1797                 mutex_lock(&mvm->mutex);
1798                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1799                 mutex_unlock(&mvm->mutex);
1800
1801                 /*
1802                  * There are transports that buffer a few frames in the host.
1803                  * For these, the flush above isn't enough since while we were
1804                  * flushing, the transport might have sent more frames to the
1805                  * device. To solve this, wait here until the transport is
1806                  * empty. Technically, this could have replaced the flush
1807                  * above, but flush is much faster than draining. So flush
1808                  * first, and drain to make sure we have no frames in the
1809                  * transport anymore.
1810                  * If a station still had frames on the shared queues, it is
1811                  * already marked as draining, so to complete the draining, we
1812                  * just need to wait until the transport is empty.
1813                  */
1814                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1815         }
1816
1817         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1818                 /*
1819                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1820                  * We assume here that all the packets sent to the OFFCHANNEL
1821                  * queue are sent in ROC session.
1822                  */
1823                 flush_work(&mvm->roc_done_wk);
1824         } else {
1825                 /*
1826                  * By now, all the AC queues are empty. The AGG queues are
1827                  * empty too. We already got all the Tx responses for all the
1828                  * packets in the queues. The drain work can have been
1829                  * triggered. Flush it.
1830                  */
1831                 flush_work(&mvm->sta_drained_wk);
1832         }
1833 }
1834
1835 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1836                                          struct ieee80211_vif *vif)
1837 {
1838         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1839         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1840
1841         iwl_mvm_prepare_mac_removal(mvm, vif);
1842
1843         mutex_lock(&mvm->mutex);
1844
1845         if (mvm->bf_allowed_vif == mvmvif) {
1846                 mvm->bf_allowed_vif = NULL;
1847                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1848                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1849         }
1850
1851         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1852
1853         /*
1854          * For AP/GO interface, the tear down of the resources allocated to the
1855          * interface is be handled as part of the stop_ap flow.
1856          */
1857         if (vif->type == NL80211_IFTYPE_AP ||
1858             vif->type == NL80211_IFTYPE_ADHOC) {
1859 #ifdef CONFIG_NL80211_TESTMODE
1860                 if (vif == mvm->noa_vif) {
1861                         mvm->noa_vif = NULL;
1862                         mvm->noa_duration = 0;
1863                 }
1864 #endif
1865                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1866                 goto out_release;
1867         }
1868
1869         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1870                 mvm->p2p_device_vif = NULL;
1871                 iwl_mvm_rm_bcast_sta(mvm, vif);
1872                 iwl_mvm_binding_remove_vif(mvm, vif);
1873                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1874                 mvmvif->phy_ctxt = NULL;
1875         }
1876
1877         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1878                 mvm->vif_count--;
1879
1880         iwl_mvm_power_update_mac(mvm);
1881         iwl_mvm_mac_ctxt_remove(mvm, vif);
1882
1883 out_release:
1884         iwl_mvm_mac_ctxt_release(mvm, vif);
1885         mutex_unlock(&mvm->mutex);
1886 }
1887
1888 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1889 {
1890         return 0;
1891 }
1892
1893 struct iwl_mvm_mc_iter_data {
1894         struct iwl_mvm *mvm;
1895         int port_id;
1896 };
1897
1898 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1899                                       struct ieee80211_vif *vif)
1900 {
1901         struct iwl_mvm_mc_iter_data *data = _data;
1902         struct iwl_mvm *mvm = data->mvm;
1903         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1904         int ret, len;
1905
1906         /* if we don't have free ports, mcast frames will be dropped */
1907         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1908                 return;
1909
1910         if (vif->type != NL80211_IFTYPE_STATION ||
1911             !vif->bss_conf.assoc)
1912                 return;
1913
1914         cmd->port_id = data->port_id++;
1915         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1916         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1917
1918         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1919         if (ret)
1920                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1921 }
1922
1923 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1924 {
1925         struct iwl_mvm_mc_iter_data iter_data = {
1926                 .mvm = mvm,
1927         };
1928
1929         lockdep_assert_held(&mvm->mutex);
1930
1931         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1932                 return;
1933
1934         ieee80211_iterate_active_interfaces_atomic(
1935                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1936                 iwl_mvm_mc_iface_iterator, &iter_data);
1937 }
1938
1939 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1940                                      struct netdev_hw_addr_list *mc_list)
1941 {
1942         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1943         struct iwl_mcast_filter_cmd *cmd;
1944         struct netdev_hw_addr *addr;
1945         int addr_count;
1946         bool pass_all;
1947         int len;
1948
1949         addr_count = netdev_hw_addr_list_count(mc_list);
1950         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1951                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1952         if (pass_all)
1953                 addr_count = 0;
1954
1955         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1956         cmd = kzalloc(len, GFP_ATOMIC);
1957         if (!cmd)
1958                 return 0;
1959
1960         if (pass_all) {
1961                 cmd->pass_all = 1;
1962                 return (u64)(unsigned long)cmd;
1963         }
1964
1965         netdev_hw_addr_list_for_each(addr, mc_list) {
1966                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1967                                    cmd->count, addr->addr);
1968                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1969                        addr->addr, ETH_ALEN);
1970                 cmd->count++;
1971         }
1972
1973         return (u64)(unsigned long)cmd;
1974 }
1975
1976 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1977                                      unsigned int changed_flags,
1978                                      unsigned int *total_flags,
1979                                      u64 multicast)
1980 {
1981         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1982         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1983
1984         mutex_lock(&mvm->mutex);
1985
1986         /* replace previous configuration */
1987         kfree(mvm->mcast_filter_cmd);
1988         mvm->mcast_filter_cmd = cmd;
1989
1990         if (!cmd)
1991                 goto out;
1992
1993         iwl_mvm_recalc_multicast(mvm);
1994 out:
1995         mutex_unlock(&mvm->mutex);
1996         *total_flags = 0;
1997 }
1998
1999 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
2000 struct iwl_bcast_iter_data {
2001         struct iwl_mvm *mvm;
2002         struct iwl_bcast_filter_cmd *cmd;
2003         u8 current_filter;
2004 };
2005
2006 static void
2007 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
2008                          const struct iwl_fw_bcast_filter *in_filter,
2009                          struct iwl_fw_bcast_filter *out_filter)
2010 {
2011         struct iwl_fw_bcast_filter_attr *attr;
2012         int i;
2013
2014         memcpy(out_filter, in_filter, sizeof(*out_filter));
2015
2016         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
2017                 attr = &out_filter->attrs[i];
2018
2019                 if (!attr->mask)
2020                         break;
2021
2022                 switch (attr->reserved1) {
2023                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
2024                         if (vif->bss_conf.arp_addr_cnt != 1) {
2025                                 attr->mask = 0;
2026                                 continue;
2027                         }
2028
2029                         attr->val = vif->bss_conf.arp_addr_list[0];
2030                         break;
2031                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
2032                         attr->val = *(__be32 *)&vif->addr[2];
2033                         break;
2034                 default:
2035                         break;
2036                 }
2037                 attr->reserved1 = 0;
2038                 out_filter->num_attrs++;
2039         }
2040 }
2041
2042 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
2043                                           struct ieee80211_vif *vif)
2044 {
2045         struct iwl_bcast_iter_data *data = _data;
2046         struct iwl_mvm *mvm = data->mvm;
2047         struct iwl_bcast_filter_cmd *cmd = data->cmd;
2048         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2049         struct iwl_fw_bcast_mac *bcast_mac;
2050         int i;
2051
2052         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
2053                 return;
2054
2055         bcast_mac = &cmd->macs[mvmvif->id];
2056
2057         /*
2058          * enable filtering only for associated stations, but not for P2P
2059          * Clients
2060          */
2061         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
2062             !vif->bss_conf.assoc)
2063                 return;
2064
2065         bcast_mac->default_discard = 1;
2066
2067         /* copy all configured filters */
2068         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
2069                 /*
2070                  * Make sure we don't exceed our filters limit.
2071                  * if there is still a valid filter to be configured,
2072                  * be on the safe side and just allow bcast for this mac.
2073                  */
2074                 if (WARN_ON_ONCE(data->current_filter >=
2075                                  ARRAY_SIZE(cmd->filters))) {
2076                         bcast_mac->default_discard = 0;
2077                         bcast_mac->attached_filters = 0;
2078                         break;
2079                 }
2080
2081                 iwl_mvm_set_bcast_filter(vif,
2082                                          &mvm->bcast_filters[i],
2083                                          &cmd->filters[data->current_filter]);
2084
2085                 /* skip current filter if it contains no attributes */
2086                 if (!cmd->filters[data->current_filter].num_attrs)
2087                         continue;
2088
2089                 /* attach the filter to current mac */
2090                 bcast_mac->attached_filters |=
2091                                 cpu_to_le16(BIT(data->current_filter));
2092
2093                 data->current_filter++;
2094         }
2095 }
2096
2097 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
2098                                     struct iwl_bcast_filter_cmd *cmd)
2099 {
2100         struct iwl_bcast_iter_data iter_data = {
2101                 .mvm = mvm,
2102                 .cmd = cmd,
2103         };
2104
2105         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
2106                 return false;
2107
2108         memset(cmd, 0, sizeof(*cmd));
2109         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
2110         cmd->max_macs = ARRAY_SIZE(cmd->macs);
2111
2112 #ifdef CONFIG_IWLWIFI_DEBUGFS
2113         /* use debugfs filters/macs if override is configured */
2114         if (mvm->dbgfs_bcast_filtering.override) {
2115                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
2116                        sizeof(cmd->filters));
2117                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
2118                        sizeof(cmd->macs));
2119                 return true;
2120         }
2121 #endif
2122
2123         /* if no filters are configured, do nothing */
2124         if (!mvm->bcast_filters)
2125                 return false;
2126
2127         /* configure and attach these filters for each associated sta vif */
2128         ieee80211_iterate_active_interfaces(
2129                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2130                 iwl_mvm_bcast_filter_iterator, &iter_data);
2131
2132         return true;
2133 }
2134 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2135                                           struct ieee80211_vif *vif)
2136 {
2137         struct iwl_bcast_filter_cmd cmd;
2138
2139         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2140                 return 0;
2141
2142         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2143                 return 0;
2144
2145         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2146                                     sizeof(cmd), &cmd);
2147 }
2148 #else
2149 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2150                                                  struct ieee80211_vif *vif)
2151 {
2152         return 0;
2153 }
2154 #endif
2155
2156 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2157                                              struct ieee80211_vif *vif,
2158                                              struct ieee80211_bss_conf *bss_conf,
2159                                              u32 changes)
2160 {
2161         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2162         int ret;
2163
2164         /*
2165          * Re-calculate the tsf id, as the master-slave relations depend on the
2166          * beacon interval, which was not known when the station interface was
2167          * added.
2168          */
2169         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2170                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2171
2172         /*
2173          * If we're not associated yet, take the (new) BSSID before associating
2174          * so the firmware knows. If we're already associated, then use the old
2175          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2176          * branch for disassociation below.
2177          */
2178         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2179                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2180
2181         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2182         if (ret)
2183                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2184
2185         /* after sending it once, adopt mac80211 data */
2186         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2187         mvmvif->associated = bss_conf->assoc;
2188
2189         if (changes & BSS_CHANGED_ASSOC) {
2190                 if (bss_conf->assoc) {
2191                         /* clear statistics to get clean beacon counter */
2192                         iwl_mvm_request_statistics(mvm, true);
2193                         memset(&mvmvif->beacon_stats, 0,
2194                                sizeof(mvmvif->beacon_stats));
2195
2196                         /* add quota for this interface */
2197                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2198                         if (ret) {
2199                                 IWL_ERR(mvm, "failed to update quotas\n");
2200                                 return;
2201                         }
2202
2203                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2204                                      &mvm->status)) {
2205                                 /*
2206                                  * If we're restarting then the firmware will
2207                                  * obviously have lost synchronisation with
2208                                  * the AP. It will attempt to synchronise by
2209                                  * itself, but we can make it more reliable by
2210                                  * scheduling a session protection time event.
2211                                  *
2212                                  * The firmware needs to receive a beacon to
2213                                  * catch up with synchronisation, use 110% of
2214                                  * the beacon interval.
2215                                  *
2216                                  * Set a large maximum delay to allow for more
2217                                  * than a single interface.
2218                                  */
2219                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2220                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2221                                                         5 * dur, false);
2222                         }
2223
2224                         iwl_mvm_sf_update(mvm, vif, false);
2225                         iwl_mvm_power_vif_assoc(mvm, vif);
2226                         if (vif->p2p) {
2227                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2228                                 iwl_mvm_update_smps(mvm, vif,
2229                                                     IWL_MVM_SMPS_REQ_PROT,
2230                                                     IEEE80211_SMPS_DYNAMIC);
2231                         }
2232                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2233                         /*
2234                          * If update fails - SF might be running in associated
2235                          * mode while disassociated - which is forbidden.
2236                          */
2237                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2238                                   "Failed to update SF upon disassociation\n");
2239
2240                         /* remove AP station now that the MAC is unassoc */
2241                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2242                         if (ret)
2243                                 IWL_ERR(mvm, "failed to remove AP station\n");
2244
2245                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2246                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2247                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2248                         /* remove quota for this interface */
2249                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2250                         if (ret)
2251                                 IWL_ERR(mvm, "failed to update quotas\n");
2252
2253                         if (vif->p2p)
2254                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2255
2256                         /* this will take the cleared BSSID from bss_conf */
2257                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2258                         if (ret)
2259                                 IWL_ERR(mvm,
2260                                         "failed to update MAC %pM (clear after unassoc)\n",
2261                                         vif->addr);
2262                 }
2263
2264                 iwl_mvm_recalc_multicast(mvm);
2265                 iwl_mvm_configure_bcast_filter(mvm, vif);
2266
2267                 /* reset rssi values */
2268                 mvmvif->bf_data.ave_beacon_signal = 0;
2269
2270                 iwl_mvm_bt_coex_vif_change(mvm);
2271                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2272                                     IEEE80211_SMPS_AUTOMATIC);
2273         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2274                 /*
2275                  * We received a beacon _after_ association so
2276                  * remove the session protection.
2277                  */
2278                 iwl_mvm_remove_time_event(mvm, mvmvif,
2279                                           &mvmvif->time_event_data);
2280         }
2281
2282         if (changes & BSS_CHANGED_BEACON_INFO) {
2283                 iwl_mvm_sf_update(mvm, vif, false);
2284                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2285         }
2286
2287         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2288                 ret = iwl_mvm_power_update_mac(mvm);
2289                 if (ret)
2290                         IWL_ERR(mvm, "failed to update power mode\n");
2291         }
2292
2293         if (changes & BSS_CHANGED_TXPOWER) {
2294                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2295                                 bss_conf->txpower);
2296                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2297         }
2298
2299         if (changes & BSS_CHANGED_CQM) {
2300                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2301                 /* reset cqm events tracking */
2302                 mvmvif->bf_data.last_cqm_event = 0;
2303                 if (mvmvif->bf_data.bf_enabled) {
2304                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2305                         if (ret)
2306                                 IWL_ERR(mvm,
2307                                         "failed to update CQM thresholds\n");
2308                 }
2309         }
2310
2311         if (changes & BSS_CHANGED_ARP_FILTER) {
2312                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2313                 iwl_mvm_configure_bcast_filter(mvm, vif);
2314         }
2315 }
2316
2317 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2318                                  struct ieee80211_vif *vif)
2319 {
2320         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2321         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2322         int ret;
2323
2324         /*
2325          * iwl_mvm_mac_ctxt_add() might read directly from the device
2326          * (the system time), so make sure it is available.
2327          */
2328         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2329         if (ret)
2330                 return ret;
2331
2332         mutex_lock(&mvm->mutex);
2333
2334         /* Send the beacon template */
2335         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2336         if (ret)
2337                 goto out_unlock;
2338
2339         /*
2340          * Re-calculate the tsf id, as the master-slave relations depend on the
2341          * beacon interval, which was not known when the AP interface was added.
2342          */
2343         if (vif->type == NL80211_IFTYPE_AP)
2344                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2345
2346         mvmvif->ap_assoc_sta_count = 0;
2347
2348         /* Add the mac context */
2349         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2350         if (ret)
2351                 goto out_unlock;
2352
2353         /* Perform the binding */
2354         ret = iwl_mvm_binding_add_vif(mvm, vif);
2355         if (ret)
2356                 goto out_remove;
2357
2358         /* Send the bcast station. At this stage the TBTT and DTIM time events
2359          * are added and applied to the scheduler */
2360         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2361         if (ret)
2362                 goto out_unbind;
2363
2364         /* must be set before quota calculations */
2365         mvmvif->ap_ibss_active = true;
2366
2367         /* power updated needs to be done before quotas */
2368         iwl_mvm_power_update_mac(mvm);
2369
2370         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2371         if (ret)
2372                 goto out_quota_failed;
2373
2374         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2375         if (vif->p2p && mvm->p2p_device_vif)
2376                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2377
2378         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2379
2380         iwl_mvm_bt_coex_vif_change(mvm);
2381
2382         /* we don't support TDLS during DCM */
2383         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2384                 iwl_mvm_teardown_tdls_peers(mvm);
2385
2386         goto out_unlock;
2387
2388 out_quota_failed:
2389         iwl_mvm_power_update_mac(mvm);
2390         mvmvif->ap_ibss_active = false;
2391         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2392 out_unbind:
2393         iwl_mvm_binding_remove_vif(mvm, vif);
2394 out_remove:
2395         iwl_mvm_mac_ctxt_remove(mvm, vif);
2396 out_unlock:
2397         mutex_unlock(&mvm->mutex);
2398         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2399         return ret;
2400 }
2401
2402 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2403                                  struct ieee80211_vif *vif)
2404 {
2405         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2406         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2407
2408         iwl_mvm_prepare_mac_removal(mvm, vif);
2409
2410         mutex_lock(&mvm->mutex);
2411
2412         /* Handle AP stop while in CSA */
2413         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2414                 iwl_mvm_remove_time_event(mvm, mvmvif,
2415                                           &mvmvif->time_event_data);
2416                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2417         }
2418
2419         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2420                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2421                 mvm->csa_tx_block_bcn_timeout = 0;
2422         }
2423
2424         mvmvif->ap_ibss_active = false;
2425         mvm->ap_last_beacon_gp2 = 0;
2426
2427         iwl_mvm_bt_coex_vif_change(mvm);
2428
2429         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2430
2431         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2432         if (vif->p2p && mvm->p2p_device_vif)
2433                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2434
2435         iwl_mvm_update_quotas(mvm, false, NULL);
2436         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2437         iwl_mvm_binding_remove_vif(mvm, vif);
2438
2439         iwl_mvm_power_update_mac(mvm);
2440
2441         iwl_mvm_mac_ctxt_remove(mvm, vif);
2442
2443         mutex_unlock(&mvm->mutex);
2444 }
2445
2446 static void
2447 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2448                                  struct ieee80211_vif *vif,
2449                                  struct ieee80211_bss_conf *bss_conf,
2450                                  u32 changes)
2451 {
2452         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2453
2454         /* Changes will be applied when the AP/IBSS is started */
2455         if (!mvmvif->ap_ibss_active)
2456                 return;
2457
2458         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2459                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2460             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2461                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2462
2463         /* Need to send a new beacon template to the FW */
2464         if (changes & BSS_CHANGED_BEACON &&
2465             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2466                 IWL_WARN(mvm, "Failed updating beacon data\n");
2467
2468         if (changes & BSS_CHANGED_TXPOWER) {
2469                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2470                                 bss_conf->txpower);
2471                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2472         }
2473
2474 }
2475
2476 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2477                                      struct ieee80211_vif *vif,
2478                                      struct ieee80211_bss_conf *bss_conf,
2479                                      u32 changes)
2480 {
2481         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2482
2483         /*
2484          * iwl_mvm_bss_info_changed_station() might call
2485          * iwl_mvm_protect_session(), which reads directly from
2486          * the device (the system time), so make sure it is available.
2487          */
2488         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2489                 return;
2490
2491         mutex_lock(&mvm->mutex);
2492
2493         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2494                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2495
2496         switch (vif->type) {
2497         case NL80211_IFTYPE_STATION:
2498                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2499                 break;
2500         case NL80211_IFTYPE_AP:
2501         case NL80211_IFTYPE_ADHOC:
2502                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2503                 break;
2504         default:
2505                 /* shouldn't happen */
2506                 WARN_ON_ONCE(1);
2507         }
2508
2509         mutex_unlock(&mvm->mutex);
2510         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2511 }
2512
2513 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2514                                struct ieee80211_vif *vif,
2515                                struct ieee80211_scan_request *hw_req)
2516 {
2517         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2518         int ret;
2519
2520         if (hw_req->req.n_channels == 0 ||
2521             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2522                 return -EINVAL;
2523
2524         mutex_lock(&mvm->mutex);
2525         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2526         mutex_unlock(&mvm->mutex);
2527
2528         return ret;
2529 }
2530
2531 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2532                                        struct ieee80211_vif *vif)
2533 {
2534         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2535
2536         mutex_lock(&mvm->mutex);
2537
2538         /* Due to a race condition, it's possible that mac80211 asks
2539          * us to stop a hw_scan when it's already stopped.  This can
2540          * happen, for instance, if we stopped the scan ourselves,
2541          * called ieee80211_scan_completed() and the userspace called
2542          * cancel scan scan before ieee80211_scan_work() could run.
2543          * To handle that, simply return if the scan is not running.
2544         */
2545         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2546                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2547
2548         mutex_unlock(&mvm->mutex);
2549 }
2550
2551 static void
2552 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2553                                   struct ieee80211_sta *sta, u16 tids,
2554                                   int num_frames,
2555                                   enum ieee80211_frame_release_type reason,
2556                                   bool more_data)
2557 {
2558         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2559
2560         /* Called when we need to transmit (a) frame(s) from mac80211 */
2561
2562         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2563                                           tids, more_data, false);
2564 }
2565
2566 static void
2567 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2568                                     struct ieee80211_sta *sta, u16 tids,
2569                                     int num_frames,
2570                                     enum ieee80211_frame_release_type reason,
2571                                     bool more_data)
2572 {
2573         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2574
2575         /* Called when we need to transmit (a) frame(s) from agg queue */
2576
2577         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2578                                           tids, more_data, true);
2579 }
2580
2581 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2582                                    struct ieee80211_vif *vif,
2583                                    enum sta_notify_cmd cmd,
2584                                    struct ieee80211_sta *sta)
2585 {
2586         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2587         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2588         unsigned long txqs = 0, tids = 0;
2589         int tid;
2590
2591         spin_lock_bh(&mvmsta->lock);
2592         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2593                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2594
2595                 if (tid_data->state != IWL_AGG_ON &&
2596                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2597                         continue;
2598
2599                 __set_bit(tid_data->txq_id, &txqs);
2600
2601                 if (iwl_mvm_tid_queued(tid_data) == 0)
2602                         continue;
2603
2604                 __set_bit(tid, &tids);
2605         }
2606
2607         switch (cmd) {
2608         case STA_NOTIFY_SLEEP:
2609                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2610                         ieee80211_sta_block_awake(hw, sta, true);
2611
2612                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2613                         ieee80211_sta_set_buffered(sta, tid, true);
2614
2615                 if (txqs)
2616                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2617                 /*
2618                  * The fw updates the STA to be asleep. Tx packets on the Tx
2619                  * queues to this station will not be transmitted. The fw will
2620                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2621                  */
2622                 break;
2623         case STA_NOTIFY_AWAKE:
2624                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2625                         break;
2626
2627                 if (txqs)
2628                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2629                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2630                 break;
2631         default:
2632                 break;
2633         }
2634         spin_unlock_bh(&mvmsta->lock);
2635 }
2636
2637 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2638                                        struct ieee80211_vif *vif,
2639                                        struct ieee80211_sta *sta)
2640 {
2641         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2642         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2643         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2644
2645         /*
2646          * This is called before mac80211 does RCU synchronisation,
2647          * so here we already invalidate our internal RCU-protected
2648          * station pointer. The rest of the code will thus no longer
2649          * be able to find the station this way, and we don't rely
2650          * on further RCU synchronisation after the sta_state()
2651          * callback deleted the station.
2652          */
2653         mutex_lock(&mvm->mutex);
2654         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2655                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2656                                    ERR_PTR(-ENOENT));
2657
2658         if (mvm_sta->vif->type == NL80211_IFTYPE_AP) {
2659                 mvmvif->ap_assoc_sta_count--;
2660                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2661         }
2662
2663         mutex_unlock(&mvm->mutex);
2664 }
2665
2666 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2667                                 const u8 *bssid)
2668 {
2669         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2670                 return;
2671
2672         if (iwlwifi_mod_params.uapsd_disable) {
2673                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2674                 return;
2675         }
2676
2677         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2678 }
2679
2680 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2681                                  struct ieee80211_vif *vif,
2682                                  struct ieee80211_sta *sta,
2683                                  enum ieee80211_sta_state old_state,
2684                                  enum ieee80211_sta_state new_state)
2685 {
2686         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2687         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2688         int ret;
2689
2690         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2691                            sta->addr, old_state, new_state);
2692
2693         /* this would be a mac80211 bug ... but don't crash */
2694         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2695                 return -EINVAL;
2696
2697         /* if a STA is being removed, reuse its ID */
2698         flush_work(&mvm->sta_drained_wk);
2699
2700         mutex_lock(&mvm->mutex);
2701         if (old_state == IEEE80211_STA_NOTEXIST &&
2702             new_state == IEEE80211_STA_NONE) {
2703                 /*
2704                  * Firmware bug - it'll crash if the beacon interval is less
2705                  * than 16. We can't avoid connecting at all, so refuse the
2706                  * station state change, this will cause mac80211 to abandon
2707                  * attempts to connect to this AP, and eventually wpa_s will
2708                  * blacklist the AP...
2709                  */
2710                 if (vif->type == NL80211_IFTYPE_STATION &&
2711                     vif->bss_conf.beacon_int < 16) {
2712                         IWL_ERR(mvm,
2713                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2714                                 sta->addr, vif->bss_conf.beacon_int);
2715                         ret = -EINVAL;
2716                         goto out_unlock;
2717                 }
2718
2719                 if (sta->tdls &&
2720                     (vif->p2p ||
2721                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2722                                                 IWL_MVM_TDLS_STA_COUNT ||
2723                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2724                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2725                         ret = -EBUSY;
2726                         goto out_unlock;
2727                 }
2728
2729                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2730                 if (sta->tdls && ret == 0)
2731                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2732         } else if (old_state == IEEE80211_STA_NONE &&
2733                    new_state == IEEE80211_STA_AUTH) {
2734                 /*
2735                  * EBS may be disabled due to previous failures reported by FW.
2736                  * Reset EBS status here assuming environment has been changed.
2737                  */
2738                 mvm->last_ebs_successful = true;
2739                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2740                 ret = 0;
2741         } else if (old_state == IEEE80211_STA_AUTH &&
2742                    new_state == IEEE80211_STA_ASSOC) {
2743                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2744                 if (ret == 0)
2745                         iwl_mvm_rs_rate_init(mvm, sta,
2746                                              mvmvif->phy_ctxt->channel->band,
2747                                              true);
2748         } else if (old_state == IEEE80211_STA_ASSOC &&
2749                    new_state == IEEE80211_STA_AUTHORIZED) {
2750
2751                 /* we don't support TDLS during DCM */
2752                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2753                         iwl_mvm_teardown_tdls_peers(mvm);
2754
2755                 /* enable beacon filtering */
2756                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2757                 ret = 0;
2758         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2759                    new_state == IEEE80211_STA_ASSOC) {
2760                 /* disable beacon filtering */
2761                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2762                 ret = 0;
2763         } else if (old_state == IEEE80211_STA_ASSOC &&
2764                    new_state == IEEE80211_STA_AUTH) {
2765                 ret = 0;
2766         } else if (old_state == IEEE80211_STA_AUTH &&
2767                    new_state == IEEE80211_STA_NONE) {
2768                 ret = 0;
2769         } else if (old_state == IEEE80211_STA_NONE &&
2770                    new_state == IEEE80211_STA_NOTEXIST) {
2771                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2772                 if (sta->tdls)
2773                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2774         } else {
2775                 ret = -EIO;
2776         }
2777  out_unlock:
2778         mutex_unlock(&mvm->mutex);
2779
2780         if (sta->tdls && ret == 0) {
2781                 if (old_state == IEEE80211_STA_NOTEXIST &&
2782                     new_state == IEEE80211_STA_NONE)
2783                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2784                 else if (old_state == IEEE80211_STA_NONE &&
2785                          new_state == IEEE80211_STA_NOTEXIST)
2786                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2787         }
2788
2789         return ret;
2790 }
2791
2792 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2793 {
2794         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2795
2796         mvm->rts_threshold = value;
2797
2798         return 0;
2799 }
2800
2801 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2802                                   struct ieee80211_vif *vif,
2803                                   struct ieee80211_sta *sta, u32 changed)
2804 {
2805         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2806
2807         if (vif->type == NL80211_IFTYPE_STATION &&
2808             changed & IEEE80211_RC_NSS_CHANGED)
2809                 iwl_mvm_sf_update(mvm, vif, false);
2810 }
2811
2812 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2813                                struct ieee80211_vif *vif, u16 ac,
2814                                const struct ieee80211_tx_queue_params *params)
2815 {
2816         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2817         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2818
2819         mvmvif->queue_params[ac] = *params;
2820
2821         /*
2822          * No need to update right away, we'll get BSS_CHANGED_QOS
2823          * The exception is P2P_DEVICE interface which needs immediate update.
2824          */
2825         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2826                 int ret;
2827
2828                 mutex_lock(&mvm->mutex);
2829                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2830                 mutex_unlock(&mvm->mutex);
2831                 return ret;
2832         }
2833         return 0;
2834 }
2835
2836 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2837                                       struct ieee80211_vif *vif)
2838 {
2839         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2840         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2841                            200 + vif->bss_conf.beacon_int);
2842         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2843                                100 + vif->bss_conf.beacon_int);
2844
2845         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2846                 return;
2847
2848         /*
2849          * iwl_mvm_protect_session() reads directly from the device
2850          * (the system time), so make sure it is available.
2851          */
2852         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2853                 return;
2854
2855         mutex_lock(&mvm->mutex);
2856         /* Try really hard to protect the session and hear a beacon */
2857         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2858         mutex_unlock(&mvm->mutex);
2859
2860         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2861 }
2862
2863 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2864                                         struct ieee80211_vif *vif,
2865                                         struct cfg80211_sched_scan_request *req,
2866                                         struct ieee80211_scan_ies *ies)
2867 {
2868         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2869
2870         int ret;
2871
2872         mutex_lock(&mvm->mutex);
2873
2874         if (!vif->bss_conf.idle) {
2875                 ret = -EBUSY;
2876                 goto out;
2877         }
2878
2879         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2880
2881 out:
2882         mutex_unlock(&mvm->mutex);
2883         return ret;
2884 }
2885
2886 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2887                                        struct ieee80211_vif *vif)
2888 {
2889         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2890         int ret;
2891
2892         mutex_lock(&mvm->mutex);
2893
2894         /* Due to a race condition, it's possible that mac80211 asks
2895          * us to stop a sched_scan when it's already stopped.  This
2896          * can happen, for instance, if we stopped the scan ourselves,
2897          * called ieee80211_sched_scan_stopped() and the userspace called
2898          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2899          * could run.  To handle this, simply return if the scan is
2900          * not running.
2901         */
2902         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2903                 mutex_unlock(&mvm->mutex);
2904                 return 0;
2905         }
2906
2907         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2908         mutex_unlock(&mvm->mutex);
2909         iwl_mvm_wait_for_async_handlers(mvm);
2910
2911         return ret;
2912 }
2913
2914 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2915                                enum set_key_cmd cmd,
2916                                struct ieee80211_vif *vif,
2917                                struct ieee80211_sta *sta,
2918                                struct ieee80211_key_conf *key)
2919 {
2920         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2921         int ret;
2922
2923         if (iwlwifi_mod_params.sw_crypto) {
2924                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2925                 return -EOPNOTSUPP;
2926         }
2927
2928         switch (key->cipher) {
2929         case WLAN_CIPHER_SUITE_TKIP:
2930                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2931                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2932                 break;
2933         case WLAN_CIPHER_SUITE_CCMP:
2934                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2935                 break;
2936         case WLAN_CIPHER_SUITE_AES_CMAC:
2937                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2938                 break;
2939         case WLAN_CIPHER_SUITE_WEP40:
2940         case WLAN_CIPHER_SUITE_WEP104:
2941                 /* For non-client mode, only use WEP keys for TX as we probably
2942                  * don't have a station yet anyway and would then have to keep
2943                  * track of the keys, linking them to each of the clients/peers
2944                  * as they appear. For now, don't do that, for performance WEP
2945                  * offload doesn't really matter much, but we need it for some
2946                  * other offload features in client mode.
2947                  */
2948                 if (vif->type != NL80211_IFTYPE_STATION)
2949                         return 0;
2950                 break;
2951         default:
2952                 /* currently FW supports only one optional cipher scheme */
2953                 if (hw->n_cipher_schemes &&
2954                     hw->cipher_schemes->cipher == key->cipher)
2955                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2956                 else
2957                         return -EOPNOTSUPP;
2958         }
2959
2960         mutex_lock(&mvm->mutex);
2961
2962         switch (cmd) {
2963         case SET_KEY:
2964                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2965                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2966                         /*
2967                          * GTK on AP interface is a TX-only key, return 0;
2968                          * on IBSS they're per-station and because we're lazy
2969                          * we don't support them for RX, so do the same.
2970                          */
2971                         ret = 0;
2972                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2973                         break;
2974                 }
2975
2976                 /* During FW restart, in order to restore the state as it was,
2977                  * don't try to reprogram keys we previously failed for.
2978                  */
2979                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2980                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2981                         IWL_DEBUG_MAC80211(mvm,
2982                                            "skip invalid idx key programming during restart\n");
2983                         ret = 0;
2984                         break;
2985                 }
2986
2987                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2988                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key,
2989                                           test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2990                                                    &mvm->status));
2991                 if (ret) {
2992                         IWL_WARN(mvm, "set key failed\n");
2993                         /*
2994                          * can't add key for RX, but we don't need it
2995                          * in the device for TX so still return 0
2996                          */
2997                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2998                         ret = 0;
2999                 }
3000
3001                 break;
3002         case DISABLE_KEY:
3003                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
3004                         ret = 0;
3005                         break;
3006                 }
3007
3008                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
3009                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
3010                 break;
3011         default:
3012                 ret = -EINVAL;
3013         }
3014
3015         mutex_unlock(&mvm->mutex);
3016         return ret;
3017 }
3018
3019 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
3020                                         struct ieee80211_vif *vif,
3021                                         struct ieee80211_key_conf *keyconf,
3022                                         struct ieee80211_sta *sta,
3023                                         u32 iv32, u16 *phase1key)
3024 {
3025         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3026
3027         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
3028                 return;
3029
3030         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
3031 }
3032
3033
3034 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
3035                                struct iwl_rx_packet *pkt, void *data)
3036 {
3037         struct iwl_mvm *mvm =
3038                 container_of(notif_wait, struct iwl_mvm, notif_wait);
3039         struct iwl_hs20_roc_res *resp;
3040         int resp_len = iwl_rx_packet_payload_len(pkt);
3041         struct iwl_mvm_time_event_data *te_data = data;
3042
3043         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
3044                 return true;
3045
3046         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
3047                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
3048                 return true;
3049         }
3050
3051         resp = (void *)pkt->data;
3052
3053         IWL_DEBUG_TE(mvm,
3054                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
3055                      resp->status, resp->event_unique_id);
3056
3057         te_data->uid = le32_to_cpu(resp->event_unique_id);
3058         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
3059                      te_data->uid);
3060
3061         spin_lock_bh(&mvm->time_event_lock);
3062         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
3063         spin_unlock_bh(&mvm->time_event_lock);
3064
3065         return true;
3066 }
3067
3068 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 200
3069 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
3070                                     struct ieee80211_channel *channel,
3071                                     struct ieee80211_vif *vif,
3072                                     int duration)
3073 {
3074         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
3075         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3076         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
3077         static const u16 time_event_response[] = { HOT_SPOT_CMD };
3078         struct iwl_notification_wait wait_time_event;
3079         struct iwl_hs20_roc_req aux_roc_req = {
3080                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
3081                 .id_and_color =
3082                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
3083                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
3084                 /* Set the channel info data */
3085                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
3086                         PHY_BAND_24 : PHY_BAND_5,
3087                 .channel_info.channel = channel->hw_value,
3088                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
3089                 /* Set the time and duration */
3090                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
3091                 .apply_time_max_delay =
3092                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
3093                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
3094          };
3095
3096         /* Set the node address */
3097         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3098
3099         lockdep_assert_held(&mvm->mutex);
3100
3101         spin_lock_bh(&mvm->time_event_lock);
3102
3103         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3104                 spin_unlock_bh(&mvm->time_event_lock);
3105                 return -EIO;
3106         }
3107
3108         te_data->vif = vif;
3109         te_data->duration = duration;
3110         te_data->id = HOT_SPOT_CMD;
3111
3112         spin_unlock_bh(&mvm->time_event_lock);
3113
3114         /*
3115          * Use a notification wait, which really just processes the
3116          * command response and doesn't wait for anything, in order
3117          * to be able to process the response and get the UID inside
3118          * the RX path. Using CMD_WANT_SKB doesn't work because it
3119          * stores the buffer and then wakes up this thread, by which
3120          * time another notification (that the time event started)
3121          * might already be processed unsuccessfully.
3122          */
3123         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3124                                    time_event_response,
3125                                    ARRAY_SIZE(time_event_response),
3126                                    iwl_mvm_rx_aux_roc, te_data);
3127
3128         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3129                                    &aux_roc_req);
3130
3131         if (res) {
3132                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3133                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3134                 goto out_clear_te;
3135         }
3136
3137         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3138         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3139         /* should never fail */
3140         WARN_ON_ONCE(res);
3141
3142         if (res) {
3143  out_clear_te:
3144                 spin_lock_bh(&mvm->time_event_lock);
3145                 iwl_mvm_te_clear_data(mvm, te_data);
3146                 spin_unlock_bh(&mvm->time_event_lock);
3147         }
3148
3149         return res;
3150 }
3151
3152 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3153                        struct ieee80211_vif *vif,
3154                        struct ieee80211_channel *channel,
3155                        int duration,
3156                        enum ieee80211_roc_type type)
3157 {
3158         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3159         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3160         struct cfg80211_chan_def chandef;
3161         struct iwl_mvm_phy_ctxt *phy_ctxt;
3162         int ret, i;
3163
3164         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3165                            duration, type);
3166
3167         flush_work(&mvm->roc_done_wk);
3168
3169         mutex_lock(&mvm->mutex);
3170
3171         switch (vif->type) {
3172         case NL80211_IFTYPE_STATION:
3173                 if (fw_has_capa(&mvm->fw->ucode_capa,
3174                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3175                         /* Use aux roc framework (HS20) */
3176                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3177                                                        vif, duration);
3178                         goto out_unlock;
3179                 }
3180                 IWL_ERR(mvm, "hotspot not supported\n");
3181                 ret = -EINVAL;
3182                 goto out_unlock;
3183         case NL80211_IFTYPE_P2P_DEVICE:
3184                 /* handle below */
3185                 break;
3186         default:
3187                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3188                 ret = -EINVAL;
3189                 goto out_unlock;
3190         }
3191
3192         for (i = 0; i < NUM_PHY_CTX; i++) {
3193                 phy_ctxt = &mvm->phy_ctxts[i];
3194                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3195                         continue;
3196
3197                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3198                         /*
3199                          * Unbind the P2P_DEVICE from the current PHY context,
3200                          * and if the PHY context is not used remove it.
3201                          */
3202                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3203                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3204                                 goto out_unlock;
3205
3206                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3207
3208                         /* Bind the P2P_DEVICE to the current PHY Context */
3209                         mvmvif->phy_ctxt = phy_ctxt;
3210
3211                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3212                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3213                                 goto out_unlock;
3214
3215                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3216                         goto schedule_time_event;
3217                 }
3218         }
3219
3220         /* Need to update the PHY context only if the ROC channel changed */
3221         if (channel == mvmvif->phy_ctxt->channel)
3222                 goto schedule_time_event;
3223
3224         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3225
3226         /*
3227          * Change the PHY context configuration as it is currently referenced
3228          * only by the P2P Device MAC
3229          */
3230         if (mvmvif->phy_ctxt->ref == 1) {
3231                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3232                                                &chandef, 1, 1);
3233                 if (ret)
3234                         goto out_unlock;
3235         } else {
3236                 /*
3237                  * The PHY context is shared with other MACs. Need to remove the
3238                  * P2P Device from the binding, allocate an new PHY context and
3239                  * create a new binding
3240                  */
3241                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3242                 if (!phy_ctxt) {
3243                         ret = -ENOSPC;
3244                         goto out_unlock;
3245                 }
3246
3247                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3248                                                1, 1);
3249                 if (ret) {
3250                         IWL_ERR(mvm, "Failed to change PHY context\n");
3251                         goto out_unlock;
3252                 }
3253
3254                 /* Unbind the P2P_DEVICE from the current PHY context */
3255                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3256                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3257                         goto out_unlock;
3258
3259                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3260
3261                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3262                 mvmvif->phy_ctxt = phy_ctxt;
3263
3264                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3265                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3266                         goto out_unlock;
3267
3268                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3269         }
3270
3271 schedule_time_event:
3272         /* Schedule the time events */
3273         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3274
3275 out_unlock:
3276         mutex_unlock(&mvm->mutex);
3277         IWL_DEBUG_MAC80211(mvm, "leave\n");
3278         return ret;
3279 }
3280
3281 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3282 {
3283         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3284
3285         IWL_DEBUG_MAC80211(mvm, "enter\n");
3286
3287         mutex_lock(&mvm->mutex);
3288         iwl_mvm_stop_roc(mvm);
3289         mutex_unlock(&mvm->mutex);
3290
3291         IWL_DEBUG_MAC80211(mvm, "leave\n");
3292         return 0;
3293 }
3294
3295 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3296                                  struct ieee80211_chanctx_conf *ctx)
3297 {
3298         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3299         struct iwl_mvm_phy_ctxt *phy_ctxt;
3300         int ret;
3301
3302         lockdep_assert_held(&mvm->mutex);
3303
3304         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3305
3306         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3307         if (!phy_ctxt) {
3308                 ret = -ENOSPC;
3309                 goto out;
3310         }
3311
3312         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3313                                        ctx->rx_chains_static,
3314                                        ctx->rx_chains_dynamic);
3315         if (ret) {
3316                 IWL_ERR(mvm, "Failed to add PHY context\n");
3317                 goto out;
3318         }
3319
3320         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3321         *phy_ctxt_id = phy_ctxt->id;
3322 out:
3323         return ret;
3324 }
3325
3326 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3327                                struct ieee80211_chanctx_conf *ctx)
3328 {
3329         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3330         int ret;
3331
3332         mutex_lock(&mvm->mutex);
3333         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3334         mutex_unlock(&mvm->mutex);
3335
3336         return ret;
3337 }
3338
3339 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3340                                      struct ieee80211_chanctx_conf *ctx)
3341 {
3342         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3343         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3344
3345         lockdep_assert_held(&mvm->mutex);
3346
3347         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3348 }
3349
3350 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3351                                    struct ieee80211_chanctx_conf *ctx)
3352 {
3353         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3354
3355         mutex_lock(&mvm->mutex);
3356         __iwl_mvm_remove_chanctx(mvm, ctx);
3357         mutex_unlock(&mvm->mutex);
3358 }
3359
3360 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3361                                    struct ieee80211_chanctx_conf *ctx,
3362                                    u32 changed)
3363 {
3364         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3365         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3366         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3367
3368         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3369                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3370                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3371                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3372                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3373                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3374                       phy_ctxt->ref, changed))
3375                 return;
3376
3377         mutex_lock(&mvm->mutex);
3378         iwl_mvm_bt_coex_vif_change(mvm);
3379         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3380                                  ctx->rx_chains_static,
3381                                  ctx->rx_chains_dynamic);
3382         mutex_unlock(&mvm->mutex);
3383 }
3384
3385 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3386                                         struct ieee80211_vif *vif,
3387                                         struct ieee80211_chanctx_conf *ctx,
3388                                         bool switching_chanctx)
3389 {
3390         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3391         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3392         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3393         int ret;
3394
3395         lockdep_assert_held(&mvm->mutex);
3396
3397         mvmvif->phy_ctxt = phy_ctxt;
3398
3399         switch (vif->type) {
3400         case NL80211_IFTYPE_AP:
3401                 /* only needed if we're switching chanctx (i.e. during CSA) */
3402                 if (switching_chanctx) {
3403                         mvmvif->ap_ibss_active = true;
3404                         break;
3405                 }
3406         case NL80211_IFTYPE_ADHOC:
3407                 /*
3408                  * The AP binding flow is handled as part of the start_ap flow
3409                  * (in bss_info_changed), similarly for IBSS.
3410                  */
3411                 ret = 0;
3412                 goto out;
3413         case NL80211_IFTYPE_STATION:
3414                 break;
3415         case NL80211_IFTYPE_MONITOR:
3416                 /* always disable PS when a monitor interface is active */
3417                 mvmvif->ps_disabled = true;
3418                 break;
3419         default:
3420                 ret = -EINVAL;
3421                 goto out;
3422         }
3423
3424         ret = iwl_mvm_binding_add_vif(mvm, vif);
3425         if (ret)
3426                 goto out;
3427
3428         /*
3429          * Power state must be updated before quotas,
3430          * otherwise fw will complain.
3431          */
3432         iwl_mvm_power_update_mac(mvm);
3433
3434         /* Setting the quota at this stage is only required for monitor
3435          * interfaces. For the other types, the bss_info changed flow
3436          * will handle quota settings.
3437          */
3438         if (vif->type == NL80211_IFTYPE_MONITOR) {
3439                 mvmvif->monitor_active = true;
3440                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3441                 if (ret)
3442                         goto out_remove_binding;
3443         }
3444
3445         /* Handle binding during CSA */
3446         if (vif->type == NL80211_IFTYPE_AP) {
3447                 iwl_mvm_update_quotas(mvm, false, NULL);
3448                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3449         }
3450
3451         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3452                 u32 duration = 2 * vif->bss_conf.beacon_int;
3453
3454                 /* iwl_mvm_protect_session() reads directly from the
3455                  * device (the system time), so make sure it is
3456                  * available.
3457                  */
3458                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3459                 if (ret)
3460                         goto out_remove_binding;
3461
3462                 /* Protect the session to make sure we hear the first
3463                  * beacon on the new channel.
3464                  */
3465                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3466                                         vif->bss_conf.beacon_int / 2,
3467                                         true);
3468
3469                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3470
3471                 iwl_mvm_update_quotas(mvm, false, NULL);
3472         }
3473
3474         goto out;
3475
3476 out_remove_binding:
3477         iwl_mvm_binding_remove_vif(mvm, vif);
3478         iwl_mvm_power_update_mac(mvm);
3479 out:
3480         if (ret)
3481                 mvmvif->phy_ctxt = NULL;
3482         return ret;
3483 }
3484 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3485                                       struct ieee80211_vif *vif,
3486                                       struct ieee80211_chanctx_conf *ctx)
3487 {
3488         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3489         int ret;
3490
3491         mutex_lock(&mvm->mutex);
3492         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3493         mutex_unlock(&mvm->mutex);
3494
3495         return ret;
3496 }
3497
3498 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3499                                            struct ieee80211_vif *vif,
3500                                            struct ieee80211_chanctx_conf *ctx,
3501                                            bool switching_chanctx)
3502 {
3503         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3504         struct ieee80211_vif *disabled_vif = NULL;
3505
3506         lockdep_assert_held(&mvm->mutex);
3507
3508         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3509
3510         switch (vif->type) {
3511         case NL80211_IFTYPE_ADHOC:
3512                 goto out;
3513         case NL80211_IFTYPE_MONITOR:
3514                 mvmvif->monitor_active = false;
3515                 mvmvif->ps_disabled = false;
3516                 break;
3517         case NL80211_IFTYPE_AP:
3518                 /* This part is triggered only during CSA */
3519                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3520                         goto out;
3521
3522                 mvmvif->csa_countdown = false;
3523
3524                 /* Set CS bit on all the stations */
3525                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3526
3527                 /* Save blocked iface, the timeout is set on the next beacon */
3528                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3529
3530                 mvmvif->ap_ibss_active = false;
3531                 break;
3532         case NL80211_IFTYPE_STATION:
3533                 if (!switching_chanctx)
3534                         break;
3535
3536                 disabled_vif = vif;
3537
3538                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3539                 break;
3540         default:
3541                 break;
3542         }
3543
3544         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3545         iwl_mvm_binding_remove_vif(mvm, vif);
3546
3547 out:
3548         mvmvif->phy_ctxt = NULL;
3549         iwl_mvm_power_update_mac(mvm);
3550 }
3551
3552 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3553                                          struct ieee80211_vif *vif,
3554                                          struct ieee80211_chanctx_conf *ctx)
3555 {
3556         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3557
3558         mutex_lock(&mvm->mutex);
3559         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3560         mutex_unlock(&mvm->mutex);
3561 }
3562
3563 static int
3564 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3565                                 struct ieee80211_vif_chanctx_switch *vifs)
3566 {
3567         int ret;
3568
3569         mutex_lock(&mvm->mutex);
3570         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3571         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3572
3573         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3574         if (ret) {
3575                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3576                 goto out_reassign;
3577         }
3578
3579         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3580                                            true);
3581         if (ret) {
3582                 IWL_ERR(mvm,
3583                         "failed to assign new_ctx during channel switch\n");
3584                 goto out_remove;
3585         }
3586
3587         /* we don't support TDLS during DCM - can be caused by channel switch */
3588         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3589                 iwl_mvm_teardown_tdls_peers(mvm);
3590
3591         goto out;
3592
3593 out_remove:
3594         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3595
3596 out_reassign:
3597         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3598                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3599                 goto out_restart;
3600         }
3601
3602         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3603                                          true)) {
3604                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3605                 goto out_restart;
3606         }
3607
3608         goto out;
3609
3610 out_restart:
3611         /* things keep failing, better restart the hw */
3612         iwl_mvm_nic_restart(mvm, false);
3613
3614 out:
3615         mutex_unlock(&mvm->mutex);
3616
3617         return ret;
3618 }
3619
3620 static int
3621 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3622                                     struct ieee80211_vif_chanctx_switch *vifs)
3623 {
3624         int ret;
3625
3626         mutex_lock(&mvm->mutex);
3627         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3628
3629         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3630                                            true);
3631         if (ret) {
3632                 IWL_ERR(mvm,
3633                         "failed to assign new_ctx during channel switch\n");
3634                 goto out_reassign;
3635         }
3636
3637         goto out;
3638
3639 out_reassign:
3640         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3641                                          true)) {
3642                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3643                 goto out_restart;
3644         }
3645
3646         goto out;
3647
3648 out_restart:
3649         /* things keep failing, better restart the hw */
3650         iwl_mvm_nic_restart(mvm, false);
3651
3652 out:
3653         mutex_unlock(&mvm->mutex);
3654
3655         return ret;
3656 }
3657
3658 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3659                                       struct ieee80211_vif_chanctx_switch *vifs,
3660                                       int n_vifs,
3661                                       enum ieee80211_chanctx_switch_mode mode)
3662 {
3663         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3664         int ret;
3665
3666         /* we only support a single-vif right now */
3667         if (n_vifs > 1)
3668                 return -EOPNOTSUPP;
3669
3670         switch (mode) {
3671         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3672                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3673                 break;
3674         case CHANCTX_SWMODE_REASSIGN_VIF:
3675                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3676                 break;
3677         default:
3678                 ret = -EOPNOTSUPP;
3679                 break;
3680         }
3681
3682         return ret;
3683 }
3684
3685 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3686                            struct ieee80211_sta *sta,
3687                            bool set)
3688 {
3689         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3690         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3691
3692         if (!mvm_sta || !mvm_sta->vif) {
3693                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3694                 return -EINVAL;
3695         }
3696
3697         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3698 }
3699
3700 #ifdef CONFIG_NL80211_TESTMODE
3701 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3702         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3703         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3704         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3705 };
3706
3707 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3708                                       struct ieee80211_vif *vif,
3709                                       void *data, int len)
3710 {
3711         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3712         int err;
3713         u32 noa_duration;
3714
3715         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3716         if (err)
3717                 return err;
3718
3719         if (!tb[IWL_MVM_TM_ATTR_CMD])
3720                 return -EINVAL;
3721
3722         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3723         case IWL_MVM_TM_CMD_SET_NOA:
3724                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3725                     !vif->bss_conf.enable_beacon ||
3726                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3727                         return -EINVAL;
3728
3729                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3730                 if (noa_duration >= vif->bss_conf.beacon_int)
3731                         return -EINVAL;
3732
3733                 mvm->noa_duration = noa_duration;
3734                 mvm->noa_vif = vif;
3735
3736                 return iwl_mvm_update_quotas(mvm, false, NULL);
3737         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3738                 /* must be associated client vif - ignore authorized */
3739                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3740                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3741                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3742                         return -EINVAL;
3743
3744                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3745                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3746                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3747         }
3748
3749         return -EOPNOTSUPP;
3750 }
3751
3752 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3753                                     struct ieee80211_vif *vif,
3754                                     void *data, int len)
3755 {
3756         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3757         int err;
3758
3759         mutex_lock(&mvm->mutex);
3760         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3761         mutex_unlock(&mvm->mutex);
3762
3763         return err;
3764 }
3765 #endif
3766
3767 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3768                                    struct ieee80211_vif *vif,
3769                                    struct ieee80211_channel_switch *chsw)
3770 {
3771         /* By implementing this operation, we prevent mac80211 from
3772          * starting its own channel switch timer, so that we can call
3773          * ieee80211_chswitch_done() ourselves at the right time
3774          * (which is when the absence time event starts).
3775          */
3776
3777         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3778                            "dummy channel switch op\n");
3779 }
3780
3781 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3782                                       struct ieee80211_vif *vif,
3783                                       struct ieee80211_channel_switch *chsw)
3784 {
3785         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3786         struct ieee80211_vif *csa_vif;
3787         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3788         u32 apply_time;
3789         int ret;
3790
3791         mutex_lock(&mvm->mutex);
3792
3793         mvmvif->csa_failed = false;
3794
3795         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3796                            chsw->chandef.center_freq1);
3797
3798         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3799
3800         switch (vif->type) {
3801         case NL80211_IFTYPE_AP:
3802                 csa_vif =
3803                         rcu_dereference_protected(mvm->csa_vif,
3804                                                   lockdep_is_held(&mvm->mutex));
3805                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3806                               "Another CSA is already in progress")) {
3807                         ret = -EBUSY;
3808                         goto out_unlock;
3809                 }
3810
3811                 rcu_assign_pointer(mvm->csa_vif, vif);
3812
3813                 if (WARN_ONCE(mvmvif->csa_countdown,
3814                               "Previous CSA countdown didn't complete")) {
3815                         ret = -EBUSY;
3816                         goto out_unlock;
3817                 }
3818
3819                 break;
3820         case NL80211_IFTYPE_STATION:
3821                 /* Schedule the time event to a bit before beacon 1,
3822                  * to make sure we're in the new channel when the
3823                  * GO/AP arrives.
3824                  */
3825                 apply_time = chsw->device_timestamp +
3826                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3827                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3828
3829                 if (chsw->block_tx)
3830                         iwl_mvm_csa_client_absent(mvm, vif);
3831
3832                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3833                                             apply_time);
3834                 if (mvmvif->bf_data.bf_enabled) {
3835                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3836                         if (ret)
3837                                 goto out_unlock;
3838                 }
3839
3840                 break;
3841         default:
3842                 break;
3843         }
3844
3845         mvmvif->ps_disabled = true;
3846
3847         ret = iwl_mvm_power_update_ps(mvm);
3848         if (ret)
3849                 goto out_unlock;
3850
3851         /* we won't be on this channel any longer */
3852         iwl_mvm_teardown_tdls_peers(mvm);
3853
3854 out_unlock:
3855         mutex_unlock(&mvm->mutex);
3856
3857         return ret;
3858 }
3859
3860 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3861                                        struct ieee80211_vif *vif)
3862 {
3863         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3864         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3865         int ret;
3866
3867         mutex_lock(&mvm->mutex);
3868
3869         if (mvmvif->csa_failed) {
3870                 mvmvif->csa_failed = false;
3871                 ret = -EIO;
3872                 goto out_unlock;
3873         }
3874
3875         if (vif->type == NL80211_IFTYPE_STATION) {
3876                 struct iwl_mvm_sta *mvmsta;
3877
3878                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3879                                                           mvmvif->ap_sta_id);
3880
3881                 if (WARN_ON(!mvmsta)) {
3882                         ret = -EIO;
3883                         goto out_unlock;
3884                 }
3885
3886                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3887
3888                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3889
3890                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3891                 if (ret)
3892                         goto out_unlock;
3893
3894                 iwl_mvm_stop_session_protection(mvm, vif);
3895         }
3896
3897         mvmvif->ps_disabled = false;
3898
3899         ret = iwl_mvm_power_update_ps(mvm);
3900
3901 out_unlock:
3902         mutex_unlock(&mvm->mutex);
3903
3904         return ret;
3905 }
3906
3907 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3908                               struct ieee80211_vif *vif, u32 queues, bool drop)
3909 {
3910         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3911         struct iwl_mvm_vif *mvmvif;
3912         struct iwl_mvm_sta *mvmsta;
3913         struct ieee80211_sta *sta;
3914         int i;
3915         u32 msk = 0;
3916
3917         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3918                 return;
3919
3920         mutex_lock(&mvm->mutex);
3921         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3922
3923         /* flush the AP-station and all TDLS peers */
3924         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3925                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3926                                                 lockdep_is_held(&mvm->mutex));
3927                 if (IS_ERR_OR_NULL(sta))
3928                         continue;
3929
3930                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3931                 if (mvmsta->vif != vif)
3932                         continue;
3933
3934                 /* make sure only TDLS peers or the AP are flushed */
3935                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3936
3937                 msk |= mvmsta->tfd_queue_msk;
3938         }
3939
3940         if (drop) {
3941                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3942                         IWL_ERR(mvm, "flush request fail\n");
3943                 mutex_unlock(&mvm->mutex);
3944         } else {
3945                 mutex_unlock(&mvm->mutex);
3946
3947                 /* this can take a while, and we may need/want other operations
3948                  * to succeed while doing this, so do it without the mutex held
3949                  */
3950                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3951         }
3952 }
3953
3954 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3955                                   struct survey_info *survey)
3956 {
3957         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3958         int ret;
3959
3960         memset(survey, 0, sizeof(*survey));
3961
3962         /* only support global statistics right now */
3963         if (idx != 0)
3964                 return -ENOENT;
3965
3966         if (fw_has_capa(&mvm->fw->ucode_capa,
3967                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3968                 return -ENOENT;
3969
3970         mutex_lock(&mvm->mutex);
3971
3972         if (mvm->ucode_loaded) {
3973                 ret = iwl_mvm_request_statistics(mvm, false);
3974                 if (ret)
3975                         goto out;
3976         }
3977
3978         survey->filled = SURVEY_INFO_TIME |
3979                          SURVEY_INFO_TIME_RX |
3980                          SURVEY_INFO_TIME_TX |
3981                          SURVEY_INFO_TIME_SCAN;
3982         survey->time = mvm->accu_radio_stats.on_time_rf +
3983                        mvm->radio_stats.on_time_rf;
3984         do_div(survey->time, USEC_PER_MSEC);
3985
3986         survey->time_rx = mvm->accu_radio_stats.rx_time +
3987                           mvm->radio_stats.rx_time;
3988         do_div(survey->time_rx, USEC_PER_MSEC);
3989
3990         survey->time_tx = mvm->accu_radio_stats.tx_time +
3991                           mvm->radio_stats.tx_time;
3992         do_div(survey->time_tx, USEC_PER_MSEC);
3993
3994         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3995                             mvm->radio_stats.on_time_scan;
3996         do_div(survey->time_scan, USEC_PER_MSEC);
3997
3998         ret = 0;
3999  out:
4000         mutex_unlock(&mvm->mutex);
4001         return ret;
4002 }
4003
4004 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
4005                                        struct ieee80211_vif *vif,
4006                                        struct ieee80211_sta *sta,
4007                                        struct station_info *sinfo)
4008 {
4009         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4010         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4011         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4012
4013         if (fw_has_capa(&mvm->fw->ucode_capa,
4014                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
4015                 return;
4016
4017         /* if beacon filtering isn't on mac80211 does it anyway */
4018         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
4019                 return;
4020
4021         if (!vif->bss_conf.assoc)
4022                 return;
4023
4024         mutex_lock(&mvm->mutex);
4025
4026         if (mvmvif->ap_sta_id != mvmsta->sta_id)
4027                 goto unlock;
4028
4029         if (iwl_mvm_request_statistics(mvm, false))
4030                 goto unlock;
4031
4032         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
4033                            mvmvif->beacon_stats.accu_num_beacons;
4034         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
4035         if (mvmvif->beacon_stats.avg_signal) {
4036                 /* firmware only reports a value after RXing a few beacons */
4037                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
4038                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
4039         }
4040  unlock:
4041         mutex_unlock(&mvm->mutex);
4042 }
4043
4044 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4045                                         struct ieee80211_vif *vif,
4046                                         const struct ieee80211_event *event)
4047 {
4048 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4049         do {                                                    \
4050                 if ((_cnt) && --(_cnt))                         \
4051                         break;                                  \
4052                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4053         } while (0)
4054
4055         struct iwl_fw_dbg_trigger_tlv *trig;
4056         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4057
4058         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4059                 return;
4060
4061         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4062         trig_mlme = (void *)trig->data;
4063         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4064                 return;
4065
4066         if (event->u.mlme.data == ASSOC_EVENT) {
4067                 if (event->u.mlme.status == MLME_DENIED)
4068                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4069                                            trig_mlme->stop_assoc_denied,
4070                                            "DENIED ASSOC: reason %d",
4071                                             event->u.mlme.reason);
4072                 else if (event->u.mlme.status == MLME_TIMEOUT)
4073                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4074                                            trig_mlme->stop_assoc_timeout,
4075                                            "ASSOC TIMEOUT");
4076         } else if (event->u.mlme.data == AUTH_EVENT) {
4077                 if (event->u.mlme.status == MLME_DENIED)
4078                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4079                                            trig_mlme->stop_auth_denied,
4080                                            "DENIED AUTH: reason %d",
4081                                            event->u.mlme.reason);
4082                 else if (event->u.mlme.status == MLME_TIMEOUT)
4083                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4084                                            trig_mlme->stop_auth_timeout,
4085                                            "AUTH TIMEOUT");
4086         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4087                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4088                                    trig_mlme->stop_rx_deauth,
4089                                    "DEAUTH RX %d", event->u.mlme.reason);
4090         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4091                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4092                                    trig_mlme->stop_tx_deauth,
4093                                    "DEAUTH TX %d", event->u.mlme.reason);
4094         }
4095 #undef CHECK_MLME_TRIGGER
4096 }
4097
4098 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4099                                           struct ieee80211_vif *vif,
4100                                           const struct ieee80211_event *event)
4101 {
4102         struct iwl_fw_dbg_trigger_tlv *trig;
4103         struct iwl_fw_dbg_trigger_ba *ba_trig;
4104
4105         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4106                 return;
4107
4108         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4109         ba_trig = (void *)trig->data;
4110         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4111                 return;
4112
4113         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4114                 return;
4115
4116         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4117                                     "BAR received from %pM, tid %d, ssn %d",
4118                                     event->u.ba.sta->addr, event->u.ba.tid,
4119                                     event->u.ba.ssn);
4120 }
4121
4122 static void
4123 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4124                                      struct ieee80211_vif *vif,
4125                                      const struct ieee80211_event *event)
4126 {
4127         struct iwl_fw_dbg_trigger_tlv *trig;
4128         struct iwl_fw_dbg_trigger_ba *ba_trig;
4129
4130         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4131                 return;
4132
4133         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4134         ba_trig = (void *)trig->data;
4135         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4136                 return;
4137
4138         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4139                 return;
4140
4141         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4142                                     "Frame from %pM timed out, tid %d",
4143                                     event->u.ba.sta->addr, event->u.ba.tid);
4144 }
4145
4146 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4147                                        struct ieee80211_vif *vif,
4148                                        const struct ieee80211_event *event)
4149 {
4150         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4151
4152         switch (event->type) {
4153         case MLME_EVENT:
4154                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4155                 break;
4156         case BAR_RX_EVENT:
4157                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4158                 break;
4159         case BA_FRAME_TIMEOUT:
4160                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4161                 break;
4162         default:
4163                 break;
4164         }
4165 }
4166
4167 const struct ieee80211_ops iwl_mvm_hw_ops = {
4168         .tx = iwl_mvm_mac_tx,
4169         .ampdu_action = iwl_mvm_mac_ampdu_action,
4170         .start = iwl_mvm_mac_start,
4171         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4172         .stop = iwl_mvm_mac_stop,
4173         .add_interface = iwl_mvm_mac_add_interface,
4174         .remove_interface = iwl_mvm_mac_remove_interface,
4175         .config = iwl_mvm_mac_config,
4176         .prepare_multicast = iwl_mvm_prepare_multicast,
4177         .configure_filter = iwl_mvm_configure_filter,
4178         .bss_info_changed = iwl_mvm_bss_info_changed,
4179         .hw_scan = iwl_mvm_mac_hw_scan,
4180         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4181         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4182         .sta_state = iwl_mvm_mac_sta_state,
4183         .sta_notify = iwl_mvm_mac_sta_notify,
4184         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4185         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4186         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4187         .sta_rc_update = iwl_mvm_sta_rc_update,
4188         .conf_tx = iwl_mvm_mac_conf_tx,
4189         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4190         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4191         .flush = iwl_mvm_mac_flush,
4192         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4193         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4194         .set_key = iwl_mvm_mac_set_key,
4195         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4196         .remain_on_channel = iwl_mvm_roc,
4197         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4198         .add_chanctx = iwl_mvm_add_chanctx,
4199         .remove_chanctx = iwl_mvm_remove_chanctx,
4200         .change_chanctx = iwl_mvm_change_chanctx,
4201         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4202         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4203         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4204
4205         .start_ap = iwl_mvm_start_ap_ibss,
4206         .stop_ap = iwl_mvm_stop_ap_ibss,
4207         .join_ibss = iwl_mvm_start_ap_ibss,
4208         .leave_ibss = iwl_mvm_stop_ap_ibss,
4209
4210         .set_tim = iwl_mvm_set_tim,
4211
4212         .channel_switch = iwl_mvm_channel_switch,
4213         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4214         .post_channel_switch = iwl_mvm_post_channel_switch,
4215
4216         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4217         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4218         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4219
4220         .event_callback = iwl_mvm_mac_event_callback,
4221
4222         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4223
4224 #ifdef CONFIG_PM_SLEEP
4225         /* look at d3.c */
4226         .suspend = iwl_mvm_suspend,
4227         .resume = iwl_mvm_resume,
4228         .set_wakeup = iwl_mvm_set_wakeup,
4229         .set_rekey_data = iwl_mvm_set_rekey_data,
4230 #if IS_ENABLED(CONFIG_IPV6)
4231         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4232 #endif
4233         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4234 #endif
4235         .get_survey = iwl_mvm_mac_get_survey,
4236         .sta_statistics = iwl_mvm_mac_sta_statistics,
4237 };