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
 576         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 577                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 578                                NL80211_FEATURE_P2P_GO_OPPPS |
 579                                NL80211_FEATURE_DYNAMIC_SMPS |
 580                                NL80211_FEATURE_STATIC_SMPS |
 581                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 582
 583         if (fw_has_capa(&mvm->fw->ucode_capa,
 584                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 585                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 586         if (fw_has_capa(&mvm->fw->ucode_capa,
 587                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 588                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 589
 590         if (fw_has_capa(&mvm->fw->ucode_capa,
 591                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 592                 hw->wiphy->features |=
 593                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 594
 595         if (fw_has_capa(&mvm->fw->ucode_capa,
 596                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 597                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 598
 599         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 600
 601 #ifdef CONFIG_PM_SLEEP
 602         if (iwl_mvm_is_d0i3_supported(mvm) &&
 603             device_can_wakeup(mvm->trans->dev)) {
 604                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 605                 hw->wiphy->wowlan = &mvm->wowlan;
 606         }
 607
 608         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 609             mvm->trans->ops->d3_suspend &&
 610             mvm->trans->ops->d3_resume &&
 611             device_can_wakeup(mvm->trans->dev)) {
 612                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 613                                      WIPHY_WOWLAN_DISCONNECT |
 614                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 615                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 616                                      WIPHY_WOWLAN_NET_DETECT;
 617                 if (!iwlwifi_mod_params.sw_crypto)
 618                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 619                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 620                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 621
 622                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 623                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 624                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 625                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 626                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 627                 hw->wiphy->wowlan = &mvm->wowlan;
 628         }
 629 #endif
 630
 631 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 632         /* assign default bcast filtering configuration */
 633         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 634 #endif
 635
 636         ret = iwl_mvm_leds_init(mvm);
 637         if (ret)
 638                 return ret;
 639
 640         if (fw_has_capa(&mvm->fw->ucode_capa,
 641                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 642                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 643                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 644                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 645         }
 646
 647         if (fw_has_capa(&mvm->fw->ucode_capa,
 648                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 649                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 650                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 651         }
 652
 653         hw->netdev_features |= mvm->cfg->features;
 654         if (!iwl_mvm_is_csum_supported(mvm))
 655                 hw->netdev_features &= ~NETIF_F_RXCSUM;
 656
 657         ret = ieee80211_register_hw(mvm->hw);
 658         if (ret)
 659                 iwl_mvm_leds_exit(mvm);
 660
 661         return ret;
 662 }
 663
 664 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 665                              struct ieee80211_sta *sta,
 666                              struct sk_buff *skb)
 667 {
 668         struct iwl_mvm_sta *mvmsta;
 669         bool defer = false;
 670
 671         /*
 672          * double check the IN_D0I3 flag both before and after
 673          * taking the spinlock, in order to prevent taking
 674          * the spinlock when not needed.
 675          */
 676         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 677                 return false;
 678
 679         spin_lock(&mvm->d0i3_tx_lock);
 680         /*
 681          * testing the flag again ensures the skb dequeue
 682          * loop (on d0i3 exit) hasn't run yet.
 683          */
 684         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 685                 goto out;
 686
 687         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 688         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 689             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 690                 goto out;
 691
 692         __skb_queue_tail(&mvm->d0i3_tx, skb);
 693         ieee80211_stop_queues(mvm->hw);
 694
 695         /* trigger wakeup */
 696         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 697         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 698
 699         defer = true;
 700 out:
 701         spin_unlock(&mvm->d0i3_tx_lock);
 702         return defer;
 703 }
 704
 705 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 706                            struct ieee80211_tx_control *control,
 707                            struct sk_buff *skb)
 708 {
 709         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 710         struct ieee80211_sta *sta = control->sta;
 711         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 712         struct ieee80211_hdr *hdr = (void *)skb->data;
 713
 714         if (iwl_mvm_is_radio_killed(mvm)) {
 715                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 716                 goto drop;
 717         }
 718
 719         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 720             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 721             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 722                 goto drop;
 723
 724         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 725         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 726                      ieee80211_is_mgmt(hdr->frame_control) &&
 727                      !ieee80211_is_deauth(hdr->frame_control) &&
 728                      !ieee80211_is_disassoc(hdr->frame_control) &&
 729                      !ieee80211_is_action(hdr->frame_control)))
 730                 sta = NULL;
 731
 732         if (sta) {
 733                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 734                         return;
 735                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 736                         goto drop;
 737                 return;
 738         }
 739
 740         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 741                 goto drop;
 742         return;
 743  drop:
 744         ieee80211_free_txskb(hw, skb);
 745 }
 746
 747 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 748 {
 749         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 750                 return false;
 751         return true;
 752 }
 753
 754 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 755 {
 756         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 757                 return false;
 758         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 759                 return true;
 760
 761         /* enabled by default */
 762         return true;
 763 }
 764
 765 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 766         do {                                                    \
 767                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 768                         break;                                  \
 769                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 770         } while (0)
 771
 772 static void
 773 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 774                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 775                             enum ieee80211_ampdu_mlme_action action)
 776 {
 777         struct iwl_fw_dbg_trigger_tlv *trig;
 778         struct iwl_fw_dbg_trigger_ba *ba_trig;
 779
 780         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 781                 return;
 782
 783         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 784         ba_trig = (void *)trig->data;
 785
 786         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 787                 return;
 788
 789         switch (action) {
 790         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 791                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 792                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 793
 794                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 795                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 796                                  sta->addr, tid, tid_data->ssn);
 797                 break;
 798                 }
 799         case IEEE80211_AMPDU_TX_STOP_CONT:
 800                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 801                                  "TX AGG STOP: MAC %pM tid %d\n",
 802                                  sta->addr, tid);
 803                 break;
 804         case IEEE80211_AMPDU_RX_START:
 805                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 806                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 807                                  sta->addr, tid, rx_ba_ssn);
 808                 break;
 809         case IEEE80211_AMPDU_RX_STOP:
 810                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 811                                  "RX AGG STOP: MAC %pM tid %d\n",
 812                                  sta->addr, tid);
 813                 break;
 814         default:
 815                 break;
 816         }
 817 }
 818
 819 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 820                                     struct ieee80211_vif *vif,
 821                                     enum ieee80211_ampdu_mlme_action action,
 822                                     struct ieee80211_sta *sta, u16 tid,
 823                                     u16 *ssn, u8 buf_size, bool amsdu)
 824 {
 825         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 826         int ret;
 827         bool tx_agg_ref = false;
 828
 829         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 830                      sta->addr, tid, action);
 831
 832         if (!(mvm->nvm_data->sku_cap_11n_enable))
 833                 return -EACCES;
 834
 835         /* return from D0i3 before starting a new Tx aggregation */
 836         switch (action) {
 837         case IEEE80211_AMPDU_TX_START:
 838         case IEEE80211_AMPDU_TX_STOP_CONT:
 839         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 840         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 841         case IEEE80211_AMPDU_TX_OPERATIONAL:
 842                 /*
 843                  * for tx start, wait synchronously until D0i3 exit to
 844                  * get the correct sequence number for the tid.
 845                  * additionally, some other ampdu actions use direct
 846                  * target access, which is not handled automatically
 847                  * by the trans layer (unlike commands), so wait for
 848                  * d0i3 exit in these cases as well.
 849                  */
 850                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 851                 if (ret)
 852                         return ret;
 853
 854                 tx_agg_ref = true;
 855                 break;
 856         default:
 857                 break;
 858         }
 859
 860         mutex_lock(&mvm->mutex);
 861
 862         switch (action) {
 863         case IEEE80211_AMPDU_RX_START:
 864                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 865                         ret = -EINVAL;
 866                         break;
 867                 }
 868                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 869                 break;
 870         case IEEE80211_AMPDU_RX_STOP:
 871                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 872                 break;
 873         case IEEE80211_AMPDU_TX_START:
 874                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 875                         ret = -EINVAL;
 876                         break;
 877                 }
 878                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 879                 break;
 880         case IEEE80211_AMPDU_TX_STOP_CONT:
 881                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 882                 break;
 883         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 884         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 885                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 886                 break;
 887         case IEEE80211_AMPDU_TX_OPERATIONAL:
 888                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 889                 break;
 890         default:
 891                 WARN_ON_ONCE(1);
 892                 ret = -EINVAL;
 893                 break;
 894         }
 895
 896         if (!ret) {
 897                 u16 rx_ba_ssn = 0;
 898
 899                 if (action == IEEE80211_AMPDU_RX_START)
 900                         rx_ba_ssn = *ssn;
 901
 902                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 903                                             rx_ba_ssn, action);
 904         }
 905         mutex_unlock(&mvm->mutex);
 906
 907         /*
 908          * If the tid is marked as started, we won't use it for offloaded
 909          * traffic on the next D0i3 entry. It's safe to unref.
 910          */
 911         if (tx_agg_ref)
 912                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 913
 914         return ret;
 915 }
 916
 917 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 918                                      struct ieee80211_vif *vif)
 919 {
 920         struct iwl_mvm *mvm = data;
 921         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 922
 923         mvmvif->uploaded = false;
 924         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 925
 926         spin_lock_bh(&mvm->time_event_lock);
 927         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 928         spin_unlock_bh(&mvm->time_event_lock);
 929
 930         mvmvif->phy_ctxt = NULL;
 931         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 932 }
 933
 934 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 935                                      const void *data, size_t datalen)
 936 {
 937         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 938         ssize_t bytes_read;
 939         ssize_t bytes_read_trans;
 940
 941         if (offset < dump_ptrs->op_mode_len) {
 942                 bytes_read = min_t(ssize_t, count,
 943                                    dump_ptrs->op_mode_len - offset);
 944                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 945                        bytes_read);
 946                 offset += bytes_read;
 947                 count -= bytes_read;
 948
 949                 if (count == 0)
 950                         return bytes_read;
 951         } else {
 952                 bytes_read = 0;
 953         }
 954
 955         if (!dump_ptrs->trans_ptr)
 956                 return bytes_read;
 957
 958         offset -= dump_ptrs->op_mode_len;
 959         bytes_read_trans = min_t(ssize_t, count,
 960                                  dump_ptrs->trans_ptr->len - offset);
 961         memcpy(buffer + bytes_read,
 962                (u8 *)dump_ptrs->trans_ptr->data + offset,
 963                bytes_read_trans);
 964
 965         return bytes_read + bytes_read_trans;
 966 }
 967
 968 static void iwl_mvm_free_coredump(const void *data)
 969 {
 970         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 971
 972         vfree(fw_error_dump->op_mode_ptr);
 973         vfree(fw_error_dump->trans_ptr);
 974         kfree(fw_error_dump);
 975 }
 976
 977 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 978                                struct iwl_fw_error_dump_data **dump_data)
 979 {
 980         struct iwl_fw_error_dump_fifo *fifo_hdr;
 981         u32 *fifo_data;
 982         u32 fifo_len;
 983         unsigned long flags;
 984         int i, j;
 985
 986         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 987                 return;
 988
 989         /* Pull RXF data from all RXFs */
 990         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
 991                 /*
 992                  * Keep aside the additional offset that might be needed for
 993                  * next RXF
 994                  */
 995                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
 996
 997                 fifo_hdr = (void *)(*dump_data)->data;
 998                 fifo_data = (void *)fifo_hdr->data;
 999                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
1000
1001                 /* No need to try to read the data if the length is 0 */
1002                 if (fifo_len == 0)
1003                         continue;
1004
1005                 /* Add a TLV for the RXF */
1006                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
1007                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1008
1009                 fifo_hdr->fifo_num = cpu_to_le32(i);
1010                 fifo_hdr->available_bytes =
1011                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1012                                                         RXF_RD_D_SPACE +
1013                                                         offset_diff));
1014                 fifo_hdr->wr_ptr =
1015                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1016                                                         RXF_RD_WR_PTR +
1017                                                         offset_diff));
1018                 fifo_hdr->rd_ptr =
1019                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1020                                                         RXF_RD_RD_PTR +
1021                                                         offset_diff));
1022                 fifo_hdr->fence_ptr =
1023                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1024                                                         RXF_RD_FENCE_PTR +
1025                                                         offset_diff));
1026                 fifo_hdr->fence_mode =
1027                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1028                                                         RXF_SET_FENCE_MODE +
1029                                                         offset_diff));
1030
1031                 /* Lock fence */
1032                 iwl_trans_write_prph(mvm->trans,
1033                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
1034                 /* Set fence pointer to the same place like WR pointer */
1035                 iwl_trans_write_prph(mvm->trans,
1036                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
1037                 /* Set fence offset */
1038                 iwl_trans_write_prph(mvm->trans,
1039                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
1040                                      0x0);
1041
1042                 /* Read FIFO */
1043                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1044                 for (j = 0; j < fifo_len; j++)
1045                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1046                                                          RXF_FIFO_RD_FENCE_INC +
1047                                                          offset_diff);
1048                 *dump_data = iwl_fw_error_next_data(*dump_data);
1049         }
1050
1051         /* Pull TXF data from all TXFs */
1052         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
1053                 /* Mark the number of TXF we're pulling now */
1054                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
1055
1056                 fifo_hdr = (void *)(*dump_data)->data;
1057                 fifo_data = (void *)fifo_hdr->data;
1058                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
1059
1060                 /* No need to try to read the data if the length is 0 */
1061                 if (fifo_len == 0)
1062                         continue;
1063
1064                 /* Add a TLV for the FIFO */
1065                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
1066                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1067
1068                 fifo_hdr->fifo_num = cpu_to_le32(i);
1069                 fifo_hdr->available_bytes =
1070                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1071                                                         TXF_FIFO_ITEM_CNT));
1072                 fifo_hdr->wr_ptr =
1073                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1074                                                         TXF_WR_PTR));
1075                 fifo_hdr->rd_ptr =
1076                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1077                                                         TXF_RD_PTR));
1078                 fifo_hdr->fence_ptr =
1079                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1080                                                         TXF_FENCE_PTR));
1081                 fifo_hdr->fence_mode =
1082                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1083                                                         TXF_LOCK_FENCE));
1084
1085                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
1086                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
1087                                      TXF_WR_PTR);
1088
1089                 /* Dummy-read to advance the read pointer to the head */
1090                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
1091
1092                 /* Read FIFO */
1093                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1094                 for (j = 0; j < fifo_len; j++)
1095                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1096                                                           TXF_READ_MODIFY_DATA);
1097                 *dump_data = iwl_fw_error_next_data(*dump_data);
1098         }
1099
1100         iwl_trans_release_nic_access(mvm->trans, &flags);
1101 }
1102
1103 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1104 {
1105         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1106             !mvm->fw_dump_desc)
1107                 return;
1108
1109         kfree(mvm->fw_dump_desc);
1110         mvm->fw_dump_desc = NULL;
1111 }
1112
1113 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1114 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1115
1116 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1117 {
1118         struct iwl_fw_error_dump_file *dump_file;
1119         struct iwl_fw_error_dump_data *dump_data;
1120         struct iwl_fw_error_dump_info *dump_info;
1121         struct iwl_fw_error_dump_mem *dump_mem;
1122         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1123         struct iwl_mvm_dump_ptrs *fw_error_dump;
1124         u32 sram_len, sram_ofs;
1125         u32 file_len, fifo_data_len = 0;
1126         u32 smem_len = mvm->cfg->smem_len;
1127         u32 sram2_len = mvm->cfg->dccm2_len;
1128         bool monitor_dump_only = false;
1129
1130         lockdep_assert_held(&mvm->mutex);
1131
1132         if (mvm->fw_dump_trig &&
1133             mvm->fw_dump_trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
1134                 monitor_dump_only = true;
1135
1136         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1137         if (!fw_error_dump)
1138                 return;
1139
1140         /* SRAM - include stack CCM if driver knows the values for it */
1141         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1142                 const struct fw_img *img;
1143
1144                 img = &mvm->fw->img[mvm->cur_ucode];
1145                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1146                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1147         } else {
1148                 sram_ofs = mvm->cfg->dccm_offset;
1149                 sram_len = mvm->cfg->dccm_len;
1150         }
1151
1152         /* reading RXF/TXF sizes */
1153         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1154                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1155                 int i;
1156
1157                 fifo_data_len = 0;
1158
1159                 /* Count RXF size */
1160                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1161                         if (!mem_cfg->rxfifo_size[i])
1162                                 continue;
1163
1164                         /* Add header info */
1165                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1166                                          sizeof(*dump_data) +
1167                                          sizeof(struct iwl_fw_error_dump_fifo);
1168                 }
1169
1170                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1171                         if (!mem_cfg->txfifo_size[i])
1172                                 continue;
1173
1174                         /* Add header info */
1175                         fifo_data_len += mem_cfg->txfifo_size[i] +
1176                                          sizeof(*dump_data) +
1177                                          sizeof(struct iwl_fw_error_dump_fifo);
1178                 }
1179         }
1180
1181         file_len = sizeof(*dump_file) +
1182                    sizeof(*dump_data) * 2 +
1183                    sram_len + sizeof(*dump_mem) +
1184                    fifo_data_len +
1185                    sizeof(*dump_info);
1186
1187         /* Make room for the SMEM, if it exists */
1188         if (smem_len)
1189                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1190
1191         /* Make room for the secondary SRAM, if it exists */
1192         if (sram2_len)
1193                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1194
1195         /* If we only want a monitor dump, reset the file length */
1196         if (monitor_dump_only) {
1197                 file_len = sizeof(*dump_file) + sizeof(*dump_data) +
1198                            sizeof(*dump_info);
1199         }
1200
1201         /*
1202          * In 8000 HW family B-step include the ICCM (which resides separately)
1203          */
1204         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1205             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1206                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1207                             IWL8260_ICCM_LEN;
1208
1209         if (mvm->fw_dump_desc)
1210                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1211                             mvm->fw_dump_desc->len;
1212
1213         dump_file = vzalloc(file_len);
1214         if (!dump_file) {
1215                 kfree(fw_error_dump);
1216                 iwl_mvm_free_fw_dump_desc(mvm);
1217                 return;
1218         }
1219
1220         fw_error_dump->op_mode_ptr = dump_file;
1221
1222         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1223         dump_data = (void *)dump_file->data;
1224
1225         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1226         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1227         dump_info = (void *) dump_data->data;
1228         dump_info->device_family =
1229                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1230                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1231                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1232         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1233         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1234                sizeof(dump_info->fw_human_readable));
1235         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1236                 sizeof(dump_info->dev_human_readable));
1237         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1238                 sizeof(dump_info->bus_human_readable));
1239
1240         dump_data = iwl_fw_error_next_data(dump_data);
1241         /* We only dump the FIFOs if the FW is in error state */
1242         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1243                 iwl_mvm_dump_fifos(mvm, &dump_data);
1244
1245         if (mvm->fw_dump_desc) {
1246                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1247                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1248                                              mvm->fw_dump_desc->len);
1249                 dump_trig = (void *)dump_data->data;
1250                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1251                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1252
1253                 /* now we can free this copy */
1254                 iwl_mvm_free_fw_dump_desc(mvm);
1255                 dump_data = iwl_fw_error_next_data(dump_data);
1256         }
1257
1258         /* In case we only want monitor dump, skip to dump trasport data */
1259         if (monitor_dump_only)
1260                 goto dump_trans_data;
1261
1262         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1263         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1264         dump_mem = (void *)dump_data->data;
1265         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1266         dump_mem->offset = cpu_to_le32(sram_ofs);
1267         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1268                                  sram_len);
1269
1270         if (smem_len) {
1271                 dump_data = iwl_fw_error_next_data(dump_data);
1272                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1273                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1274                 dump_mem = (void *)dump_data->data;
1275                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1276                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1277                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1278                                          dump_mem->data, smem_len);
1279         }
1280
1281         if (sram2_len) {
1282                 dump_data = iwl_fw_error_next_data(dump_data);
1283                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1284                 dump_data->len = cpu_to_le32(sram2_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(mvm->cfg->dccm2_offset);
1288                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1289                                          dump_mem->data, sram2_len);
1290         }
1291
1292         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1293             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1294                 dump_data = iwl_fw_error_next_data(dump_data);
1295                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1296                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1297                                              sizeof(*dump_mem));
1298                 dump_mem = (void *)dump_data->data;
1299                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1300                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1301                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1302                                          dump_mem->data, IWL8260_ICCM_LEN);
1303         }
1304
1305 dump_trans_data:
1306         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,
1307                                                        mvm->fw_dump_trig);
1308         fw_error_dump->op_mode_len = file_len;
1309         if (fw_error_dump->trans_ptr)
1310                 file_len += fw_error_dump->trans_ptr->len;
1311         dump_file->file_len = cpu_to_le32(file_len);
1312
1313         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1314                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1315
1316         mvm->fw_dump_trig = NULL;
1317         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1318 }
1319
1320 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1321         .trig_desc = {
1322                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1323         },
1324 };
1325
1326 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1327 {
1328         /* clear the D3 reconfig, we only need it to avoid dumping a
1329          * firmware coredump on reconfiguration, we shouldn't do that
1330          * on D3->D0 transition
1331          */
1332         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1333                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1334                 iwl_mvm_fw_error_dump(mvm);
1335         }
1336
1337         /* cleanup all stale references (scan, roc), but keep the
1338          * ucode_down ref until reconfig is complete
1339          */
1340         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1341
1342         iwl_trans_stop_device(mvm->trans);
1343
1344         mvm->scan_status = 0;
1345         mvm->ps_disabled = false;
1346         mvm->calibrating = false;
1347
1348         /* just in case one was running */
1349         ieee80211_remain_on_channel_expired(mvm->hw);
1350
1351         /*
1352          * cleanup all interfaces, even inactive ones, as some might have
1353          * gone down during the HW restart
1354          */
1355         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1356
1357         mvm->p2p_device_vif = NULL;
1358         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1359
1360         iwl_mvm_reset_phy_ctxts(mvm);
1361         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1362         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1363         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1364         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1365         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1366         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1367         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1368         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1369
1370         ieee80211_wake_queues(mvm->hw);
1371
1372         /* clear any stale d0i3 state */
1373         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1374
1375         mvm->vif_count = 0;
1376         mvm->rx_ba_sessions = 0;
1377         mvm->fw_dbg_conf = FW_DBG_INVALID;
1378
1379         /* keep statistics ticking */
1380         iwl_mvm_accu_radio_stats(mvm);
1381 }
1382
1383 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1384 {
1385         int ret;
1386
1387         lockdep_assert_held(&mvm->mutex);
1388
1389         /* Clean up some internal and mac80211 state on restart */
1390         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1391                 iwl_mvm_restart_cleanup(mvm);
1392
1393         ret = iwl_mvm_up(mvm);
1394
1395         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1396                 /* Something went wrong - we need to finish some cleanup
1397                  * that normally iwl_mvm_mac_restart_complete() below
1398                  * would do.
1399                  */
1400                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1401                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1402         }
1403
1404         return ret;
1405 }
1406
1407 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1408 {
1409         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1410         int ret;
1411
1412         /* Some hw restart cleanups must not hold the mutex */
1413         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1414                 /*
1415                  * Make sure we are out of d0i3. This is needed
1416                  * to make sure the reference accounting is correct
1417                  * (and there is no stale d0i3_exit_work).
1418                  */
1419                 wait_event_timeout(mvm->d0i3_exit_waitq,
1420                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1421                                              &mvm->status),
1422                                    HZ);
1423         }
1424
1425         mutex_lock(&mvm->mutex);
1426         ret = __iwl_mvm_mac_start(mvm);
1427         mutex_unlock(&mvm->mutex);
1428
1429         return ret;
1430 }
1431
1432 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1433 {
1434         int ret;
1435
1436         mutex_lock(&mvm->mutex);
1437
1438         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1439         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1440         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1441         if (ret)
1442                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1443                         ret);
1444
1445         /* allow transport/FW low power modes */
1446         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1447
1448         /*
1449          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1450          * of packets the FW sent out, so we must reconnect.
1451          */
1452         iwl_mvm_teardown_tdls_peers(mvm);
1453
1454         mutex_unlock(&mvm->mutex);
1455 }
1456
1457 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1458 {
1459         if (!iwl_mvm_is_d0i3_supported(mvm))
1460                 return;
1461
1462         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1463                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1464                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1465                                                   &mvm->status),
1466                                         HZ))
1467                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1468 }
1469
1470 static void
1471 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1472                               enum ieee80211_reconfig_type reconfig_type)
1473 {
1474         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1475
1476         switch (reconfig_type) {
1477         case IEEE80211_RECONFIG_TYPE_RESTART:
1478                 iwl_mvm_restart_complete(mvm);
1479                 break;
1480         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1481                 iwl_mvm_resume_complete(mvm);
1482                 break;
1483         }
1484 }
1485
1486 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1487 {
1488         lockdep_assert_held(&mvm->mutex);
1489
1490         /* firmware counters are obviously reset now, but we shouldn't
1491          * partially track so also clear the fw_reset_accu counters.
1492          */
1493         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1494
1495         /*
1496          * Disallow low power states when the FW is down by taking
1497          * the UCODE_DOWN ref. in case of ongoing hw restart the
1498          * ref is already taken, so don't take it again.
1499          */
1500         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1501                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1502
1503         /* async_handlers_wk is now blocked */
1504
1505         /*
1506          * The work item could be running or queued if the
1507          * ROC time event stops just as we get here.
1508          */
1509         flush_work(&mvm->roc_done_wk);
1510
1511         iwl_trans_stop_device(mvm->trans);
1512
1513         iwl_mvm_async_handlers_purge(mvm);
1514         /* async_handlers_list is empty and will stay empty: HW is stopped */
1515
1516         /* the fw is stopped, the aux sta is dead: clean up driver state */
1517         iwl_mvm_del_aux_sta(mvm);
1518
1519         /*
1520          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1521          * won't be called in this case).
1522          * But make sure to cleanup interfaces that have gone down before/during
1523          * HW restart was requested.
1524          */
1525         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1526                 ieee80211_iterate_interfaces(mvm->hw, 0,
1527                                              iwl_mvm_cleanup_iterator, mvm);
1528
1529         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1530          * make sure there's nothing left there and warn if any is found.
1531          */
1532         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1533                 int i;
1534
1535                 for (i = 0; i < mvm->max_scans; i++) {
1536                         if (WARN_ONCE(mvm->scan_uid_status[i],
1537                                       "UMAC scan UID %d status was not cleaned\n",
1538                                       i))
1539                                 mvm->scan_uid_status[i] = 0;
1540                 }
1541         }
1542
1543         mvm->ucode_loaded = false;
1544 }
1545
1546 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1547 {
1548         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1549
1550         flush_work(&mvm->d0i3_exit_work);
1551         flush_work(&mvm->async_handlers_wk);
1552         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1553         iwl_mvm_free_fw_dump_desc(mvm);
1554
1555         mutex_lock(&mvm->mutex);
1556         __iwl_mvm_mac_stop(mvm);
1557         mutex_unlock(&mvm->mutex);
1558
1559         /*
1560          * The worker might have been waiting for the mutex, let it run and
1561          * discover that its list is now empty.
1562          */
1563         cancel_work_sync(&mvm->async_handlers_wk);
1564 }
1565
1566 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1567 {
1568         u16 i;
1569
1570         lockdep_assert_held(&mvm->mutex);
1571
1572         for (i = 0; i < NUM_PHY_CTX; i++)
1573                 if (!mvm->phy_ctxts[i].ref)
1574                         return &mvm->phy_ctxts[i];
1575
1576         IWL_ERR(mvm, "No available PHY context\n");
1577         return NULL;
1578 }
1579
1580 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1581                                 s16 tx_power)
1582 {
1583         struct iwl_dev_tx_power_cmd cmd = {
1584                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1585                 .v2.mac_context_id =
1586                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1587                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1588         };
1589         int len = sizeof(cmd);
1590
1591         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1592                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1593
1594         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1595                 len = sizeof(cmd.v2);
1596
1597         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1598 }
1599
1600 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1601                                      struct ieee80211_vif *vif)
1602 {
1603         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1604         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1605         int ret;
1606
1607         mvmvif->mvm = mvm;
1608
1609         /*
1610          * make sure D0i3 exit is completed, otherwise a target access
1611          * during tx queue configuration could be done when still in
1612          * D0i3 state.
1613          */
1614         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1615         if (ret)
1616                 return ret;
1617
1618         /*
1619          * Not much to do here. The stack will not allow interface
1620          * types or combinations that we didn't advertise, so we
1621          * don't really have to check the types.
1622          */
1623
1624         mutex_lock(&mvm->mutex);
1625
1626         /* make sure that beacon statistics don't go backwards with FW reset */
1627         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1628                 mvmvif->beacon_stats.accu_num_beacons +=
1629                         mvmvif->beacon_stats.num_beacons;
1630
1631         /* Allocate resources for the MAC context, and add it to the fw  */
1632         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1633         if (ret)
1634                 goto out_unlock;
1635
1636         /* Counting number of interfaces is needed for legacy PM */
1637         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1638                 mvm->vif_count++;
1639
1640         /*
1641          * The AP binding flow can be done only after the beacon
1642          * template is configured (which happens only in the mac80211
1643          * start_ap() flow), and adding the broadcast station can happen
1644          * only after the binding.
1645          * In addition, since modifying the MAC before adding a bcast
1646          * station is not allowed by the FW, delay the adding of MAC context to
1647          * the point where we can also add the bcast station.
1648          * In short: there's not much we can do at this point, other than
1649          * allocating resources :)
1650          */
1651         if (vif->type == NL80211_IFTYPE_AP ||
1652             vif->type == NL80211_IFTYPE_ADHOC) {
1653                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1654                 if (ret) {
1655                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1656                         goto out_release;
1657                 }
1658
1659                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1660                 goto out_unlock;
1661         }
1662
1663         mvmvif->features |= hw->netdev_features;
1664
1665         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1666         if (ret)
1667                 goto out_release;
1668
1669         ret = iwl_mvm_power_update_mac(mvm);
1670         if (ret)
1671                 goto out_remove_mac;
1672
1673         /* beacon filtering */
1674         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1675         if (ret)
1676                 goto out_remove_mac;
1677
1678         if (!mvm->bf_allowed_vif &&
1679             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1680                 mvm->bf_allowed_vif = mvmvif;
1681                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1682                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1683         }
1684
1685         /*
1686          * P2P_DEVICE interface does not have a channel context assigned to it,
1687          * so a dedicated PHY context is allocated to it and the corresponding
1688          * MAC context is bound to it at this stage.
1689          */
1690         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1691
1692                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1693                 if (!mvmvif->phy_ctxt) {
1694                         ret = -ENOSPC;
1695                         goto out_free_bf;
1696                 }
1697
1698                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1699                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1700                 if (ret)
1701                         goto out_unref_phy;
1702
1703                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1704                 if (ret)
1705                         goto out_unbind;
1706
1707                 /* Save a pointer to p2p device vif, so it can later be used to
1708                  * update the p2p device MAC when a GO is started/stopped */
1709                 mvm->p2p_device_vif = vif;
1710         }
1711
1712         iwl_mvm_vif_dbgfs_register(mvm, vif);
1713         goto out_unlock;
1714
1715  out_unbind:
1716         iwl_mvm_binding_remove_vif(mvm, vif);
1717  out_unref_phy:
1718         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1719  out_free_bf:
1720         if (mvm->bf_allowed_vif == mvmvif) {
1721                 mvm->bf_allowed_vif = NULL;
1722                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1723                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1724         }
1725  out_remove_mac:
1726         mvmvif->phy_ctxt = NULL;
1727         iwl_mvm_mac_ctxt_remove(mvm, vif);
1728  out_release:
1729         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1730                 mvm->vif_count--;
1731
1732         iwl_mvm_mac_ctxt_release(mvm, vif);
1733  out_unlock:
1734         mutex_unlock(&mvm->mutex);
1735
1736         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1737
1738         return ret;
1739 }
1740
1741 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1742                                         struct ieee80211_vif *vif)
1743 {
1744         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1745
1746         if (tfd_msk) {
1747                 /*
1748                  * mac80211 first removes all the stations of the vif and
1749                  * then removes the vif. When it removes a station it also
1750                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1751                  * of all the stations of this vif are closed, and the queues
1752                  * of these AMPDU sessions are properly closed.
1753                  * We still need to take care of the shared queues of the vif.
1754                  * Flush them here.
1755                  */
1756                 mutex_lock(&mvm->mutex);
1757                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1758                 mutex_unlock(&mvm->mutex);
1759
1760                 /*
1761                  * There are transports that buffer a few frames in the host.
1762                  * For these, the flush above isn't enough since while we were
1763                  * flushing, the transport might have sent more frames to the
1764                  * device. To solve this, wait here until the transport is
1765                  * empty. Technically, this could have replaced the flush
1766                  * above, but flush is much faster than draining. So flush
1767                  * first, and drain to make sure we have no frames in the
1768                  * transport anymore.
1769                  * If a station still had frames on the shared queues, it is
1770                  * already marked as draining, so to complete the draining, we
1771                  * just need to wait until the transport is empty.
1772                  */
1773                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1774         }
1775
1776         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1777                 /*
1778                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1779                  * We assume here that all the packets sent to the OFFCHANNEL
1780                  * queue are sent in ROC session.
1781                  */
1782                 flush_work(&mvm->roc_done_wk);
1783         } else {
1784                 /*
1785                  * By now, all the AC queues are empty. The AGG queues are
1786                  * empty too. We already got all the Tx responses for all the
1787                  * packets in the queues. The drain work can have been
1788                  * triggered. Flush it.
1789                  */
1790                 flush_work(&mvm->sta_drained_wk);
1791         }
1792 }
1793
1794 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1795                                          struct ieee80211_vif *vif)
1796 {
1797         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1798         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1799
1800         iwl_mvm_prepare_mac_removal(mvm, vif);
1801
1802         mutex_lock(&mvm->mutex);
1803
1804         if (mvm->bf_allowed_vif == mvmvif) {
1805                 mvm->bf_allowed_vif = NULL;
1806                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1807                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1808         }
1809
1810         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1811
1812         /*
1813          * For AP/GO interface, the tear down of the resources allocated to the
1814          * interface is be handled as part of the stop_ap flow.
1815          */
1816         if (vif->type == NL80211_IFTYPE_AP ||
1817             vif->type == NL80211_IFTYPE_ADHOC) {
1818 #ifdef CONFIG_NL80211_TESTMODE
1819                 if (vif == mvm->noa_vif) {
1820                         mvm->noa_vif = NULL;
1821                         mvm->noa_duration = 0;
1822                 }
1823 #endif
1824                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1825                 goto out_release;
1826         }
1827
1828         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1829                 mvm->p2p_device_vif = NULL;
1830                 iwl_mvm_rm_bcast_sta(mvm, vif);
1831                 iwl_mvm_binding_remove_vif(mvm, vif);
1832                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1833                 mvmvif->phy_ctxt = NULL;
1834         }
1835
1836         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1837                 mvm->vif_count--;
1838
1839         iwl_mvm_power_update_mac(mvm);
1840         iwl_mvm_mac_ctxt_remove(mvm, vif);
1841
1842 out_release:
1843         iwl_mvm_mac_ctxt_release(mvm, vif);
1844         mutex_unlock(&mvm->mutex);
1845 }
1846
1847 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1848 {
1849         return 0;
1850 }
1851
1852 struct iwl_mvm_mc_iter_data {
1853         struct iwl_mvm *mvm;
1854         int port_id;
1855 };
1856
1857 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1858                                       struct ieee80211_vif *vif)
1859 {
1860         struct iwl_mvm_mc_iter_data *data = _data;
1861         struct iwl_mvm *mvm = data->mvm;
1862         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1863         int ret, len;
1864
1865         /* if we don't have free ports, mcast frames will be dropped */
1866         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1867                 return;
1868
1869         if (vif->type != NL80211_IFTYPE_STATION ||
1870             !vif->bss_conf.assoc)
1871                 return;
1872
1873         cmd->port_id = data->port_id++;
1874         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1875         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1876
1877         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1878         if (ret)
1879                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1880 }
1881
1882 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1883 {
1884         struct iwl_mvm_mc_iter_data iter_data = {
1885                 .mvm = mvm,
1886         };
1887
1888         lockdep_assert_held(&mvm->mutex);
1889
1890         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1891                 return;
1892
1893         ieee80211_iterate_active_interfaces_atomic(
1894                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1895                 iwl_mvm_mc_iface_iterator, &iter_data);
1896 }
1897
1898 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1899                                      struct netdev_hw_addr_list *mc_list)
1900 {
1901         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1902         struct iwl_mcast_filter_cmd *cmd;
1903         struct netdev_hw_addr *addr;
1904         int addr_count;
1905         bool pass_all;
1906         int len;
1907
1908         addr_count = netdev_hw_addr_list_count(mc_list);
1909         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1910                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1911         if (pass_all)
1912                 addr_count = 0;
1913
1914         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1915         cmd = kzalloc(len, GFP_ATOMIC);
1916         if (!cmd)
1917                 return 0;
1918
1919         if (pass_all) {
1920                 cmd->pass_all = 1;
1921                 return (u64)(unsigned long)cmd;
1922         }
1923
1924         netdev_hw_addr_list_for_each(addr, mc_list) {
1925                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1926                                    cmd->count, addr->addr);
1927                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1928                        addr->addr, ETH_ALEN);
1929                 cmd->count++;
1930         }
1931
1932         return (u64)(unsigned long)cmd;
1933 }
1934
1935 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1936                                      unsigned int changed_flags,
1937                                      unsigned int *total_flags,
1938                                      u64 multicast)
1939 {
1940         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1941         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1942
1943         mutex_lock(&mvm->mutex);
1944
1945         /* replace previous configuration */
1946         kfree(mvm->mcast_filter_cmd);
1947         mvm->mcast_filter_cmd = cmd;
1948
1949         if (!cmd)
1950                 goto out;
1951
1952         iwl_mvm_recalc_multicast(mvm);
1953 out:
1954         mutex_unlock(&mvm->mutex);
1955         *total_flags = 0;
1956 }
1957
1958 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1959 struct iwl_bcast_iter_data {
1960         struct iwl_mvm *mvm;
1961         struct iwl_bcast_filter_cmd *cmd;
1962         u8 current_filter;
1963 };
1964
1965 static void
1966 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1967                          const struct iwl_fw_bcast_filter *in_filter,
1968                          struct iwl_fw_bcast_filter *out_filter)
1969 {
1970         struct iwl_fw_bcast_filter_attr *attr;
1971         int i;
1972
1973         memcpy(out_filter, in_filter, sizeof(*out_filter));
1974
1975         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1976                 attr = &out_filter->attrs[i];
1977
1978                 if (!attr->mask)
1979                         break;
1980
1981                 switch (attr->reserved1) {
1982                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1983                         if (vif->bss_conf.arp_addr_cnt != 1) {
1984                                 attr->mask = 0;
1985                                 continue;
1986                         }
1987
1988                         attr->val = vif->bss_conf.arp_addr_list[0];
1989                         break;
1990                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1991                         attr->val = *(__be32 *)&vif->addr[2];
1992                         break;
1993                 default:
1994                         break;
1995                 }
1996                 attr->reserved1 = 0;
1997                 out_filter->num_attrs++;
1998         }
1999 }
2000
2001 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
2002                                           struct ieee80211_vif *vif)
2003 {
2004         struct iwl_bcast_iter_data *data = _data;
2005         struct iwl_mvm *mvm = data->mvm;
2006         struct iwl_bcast_filter_cmd *cmd = data->cmd;
2007         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2008         struct iwl_fw_bcast_mac *bcast_mac;
2009         int i;
2010
2011         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
2012                 return;
2013
2014         bcast_mac = &cmd->macs[mvmvif->id];
2015
2016         /*
2017          * enable filtering only for associated stations, but not for P2P
2018          * Clients
2019          */
2020         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
2021             !vif->bss_conf.assoc)
2022                 return;
2023
2024         bcast_mac->default_discard = 1;
2025
2026         /* copy all configured filters */
2027         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
2028                 /*
2029                  * Make sure we don't exceed our filters limit.
2030                  * if there is still a valid filter to be configured,
2031                  * be on the safe side and just allow bcast for this mac.
2032                  */
2033                 if (WARN_ON_ONCE(data->current_filter >=
2034                                  ARRAY_SIZE(cmd->filters))) {
2035                         bcast_mac->default_discard = 0;
2036                         bcast_mac->attached_filters = 0;
2037                         break;
2038                 }
2039
2040                 iwl_mvm_set_bcast_filter(vif,
2041                                          &mvm->bcast_filters[i],
2042                                          &cmd->filters[data->current_filter]);
2043
2044                 /* skip current filter if it contains no attributes */
2045                 if (!cmd->filters[data->current_filter].num_attrs)
2046                         continue;
2047
2048                 /* attach the filter to current mac */
2049                 bcast_mac->attached_filters |=
2050                                 cpu_to_le16(BIT(data->current_filter));
2051
2052                 data->current_filter++;
2053         }
2054 }
2055
2056 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
2057                                     struct iwl_bcast_filter_cmd *cmd)
2058 {
2059         struct iwl_bcast_iter_data iter_data = {
2060                 .mvm = mvm,
2061                 .cmd = cmd,
2062         };
2063
2064         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
2065                 return false;
2066
2067         memset(cmd, 0, sizeof(*cmd));
2068         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
2069         cmd->max_macs = ARRAY_SIZE(cmd->macs);
2070
2071 #ifdef CONFIG_IWLWIFI_DEBUGFS
2072         /* use debugfs filters/macs if override is configured */
2073         if (mvm->dbgfs_bcast_filtering.override) {
2074                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
2075                        sizeof(cmd->filters));
2076                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
2077                        sizeof(cmd->macs));
2078                 return true;
2079         }
2080 #endif
2081
2082         /* if no filters are configured, do nothing */
2083         if (!mvm->bcast_filters)
2084                 return false;
2085
2086         /* configure and attach these filters for each associated sta vif */
2087         ieee80211_iterate_active_interfaces(
2088                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2089                 iwl_mvm_bcast_filter_iterator, &iter_data);
2090
2091         return true;
2092 }
2093 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2094                                           struct ieee80211_vif *vif)
2095 {
2096         struct iwl_bcast_filter_cmd cmd;
2097
2098         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2099                 return 0;
2100
2101         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2102                 return 0;
2103
2104         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2105                                     sizeof(cmd), &cmd);
2106 }
2107 #else
2108 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2109                                                  struct ieee80211_vif *vif)
2110 {
2111         return 0;
2112 }
2113 #endif
2114
2115 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2116                                              struct ieee80211_vif *vif,
2117                                              struct ieee80211_bss_conf *bss_conf,
2118                                              u32 changes)
2119 {
2120         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2121         int ret;
2122
2123         /*
2124          * Re-calculate the tsf id, as the master-slave relations depend on the
2125          * beacon interval, which was not known when the station interface was
2126          * added.
2127          */
2128         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2129                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2130
2131         /*
2132          * If we're not associated yet, take the (new) BSSID before associating
2133          * so the firmware knows. If we're already associated, then use the old
2134          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2135          * branch for disassociation below.
2136          */
2137         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2138                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2139
2140         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2141         if (ret)
2142                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2143
2144         /* after sending it once, adopt mac80211 data */
2145         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2146         mvmvif->associated = bss_conf->assoc;
2147
2148         if (changes & BSS_CHANGED_ASSOC) {
2149                 if (bss_conf->assoc) {
2150                         /* clear statistics to get clean beacon counter */
2151                         iwl_mvm_request_statistics(mvm, true);
2152                         memset(&mvmvif->beacon_stats, 0,
2153                                sizeof(mvmvif->beacon_stats));
2154
2155                         /* add quota for this interface */
2156                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2157                         if (ret) {
2158                                 IWL_ERR(mvm, "failed to update quotas\n");
2159                                 return;
2160                         }
2161
2162                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2163                                      &mvm->status)) {
2164                                 /*
2165                                  * If we're restarting then the firmware will
2166                                  * obviously have lost synchronisation with
2167                                  * the AP. It will attempt to synchronise by
2168                                  * itself, but we can make it more reliable by
2169                                  * scheduling a session protection time event.
2170                                  *
2171                                  * The firmware needs to receive a beacon to
2172                                  * catch up with synchronisation, use 110% of
2173                                  * the beacon interval.
2174                                  *
2175                                  * Set a large maximum delay to allow for more
2176                                  * than a single interface.
2177                                  */
2178                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2179                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2180                                                         5 * dur, false);
2181                         }
2182
2183                         iwl_mvm_sf_update(mvm, vif, false);
2184                         iwl_mvm_power_vif_assoc(mvm, vif);
2185                         if (vif->p2p) {
2186                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2187                                 iwl_mvm_update_smps(mvm, vif,
2188                                                     IWL_MVM_SMPS_REQ_PROT,
2189                                                     IEEE80211_SMPS_DYNAMIC);
2190                         }
2191                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2192                         /*
2193                          * If update fails - SF might be running in associated
2194                          * mode while disassociated - which is forbidden.
2195                          */
2196                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2197                                   "Failed to update SF upon disassociation\n");
2198
2199                         /* remove AP station now that the MAC is unassoc */
2200                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2201                         if (ret)
2202                                 IWL_ERR(mvm, "failed to remove AP station\n");
2203
2204                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2205                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2206                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2207                         /* remove quota for this interface */
2208                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2209                         if (ret)
2210                                 IWL_ERR(mvm, "failed to update quotas\n");
2211
2212                         if (vif->p2p)
2213                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2214
2215                         /* this will take the cleared BSSID from bss_conf */
2216                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2217                         if (ret)
2218                                 IWL_ERR(mvm,
2219                                         "failed to update MAC %pM (clear after unassoc)\n",
2220                                         vif->addr);
2221                 }
2222
2223                 iwl_mvm_recalc_multicast(mvm);
2224                 iwl_mvm_configure_bcast_filter(mvm, vif);
2225
2226                 /* reset rssi values */
2227                 mvmvif->bf_data.ave_beacon_signal = 0;
2228
2229                 iwl_mvm_bt_coex_vif_change(mvm);
2230                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2231                                     IEEE80211_SMPS_AUTOMATIC);
2232         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2233                 /*
2234                  * We received a beacon _after_ association so
2235                  * remove the session protection.
2236                  */
2237                 iwl_mvm_remove_time_event(mvm, mvmvif,
2238                                           &mvmvif->time_event_data);
2239         }
2240
2241         if (changes & BSS_CHANGED_BEACON_INFO) {
2242                 iwl_mvm_sf_update(mvm, vif, false);
2243                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2244         }
2245
2246         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2247                 ret = iwl_mvm_power_update_mac(mvm);
2248                 if (ret)
2249                         IWL_ERR(mvm, "failed to update power mode\n");
2250         }
2251
2252         if (changes & BSS_CHANGED_TXPOWER) {
2253                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2254                                 bss_conf->txpower);
2255                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2256         }
2257
2258         if (changes & BSS_CHANGED_CQM) {
2259                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2260                 /* reset cqm events tracking */
2261                 mvmvif->bf_data.last_cqm_event = 0;
2262                 if (mvmvif->bf_data.bf_enabled) {
2263                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2264                         if (ret)
2265                                 IWL_ERR(mvm,
2266                                         "failed to update CQM thresholds\n");
2267                 }
2268         }
2269
2270         if (changes & BSS_CHANGED_ARP_FILTER) {
2271                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2272                 iwl_mvm_configure_bcast_filter(mvm, vif);
2273         }
2274 }
2275
2276 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2277                                  struct ieee80211_vif *vif)
2278 {
2279         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2280         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2281         int ret;
2282
2283         /*
2284          * iwl_mvm_mac_ctxt_add() might read directly from the device
2285          * (the system time), so make sure it is available.
2286          */
2287         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2288         if (ret)
2289                 return ret;
2290
2291         mutex_lock(&mvm->mutex);
2292
2293         /* Send the beacon template */
2294         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2295         if (ret)
2296                 goto out_unlock;
2297
2298         /*
2299          * Re-calculate the tsf id, as the master-slave relations depend on the
2300          * beacon interval, which was not known when the AP interface was added.
2301          */
2302         if (vif->type == NL80211_IFTYPE_AP)
2303                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2304
2305         mvmvif->ap_assoc_sta_count = 0;
2306
2307         /* Add the mac context */
2308         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2309         if (ret)
2310                 goto out_unlock;
2311
2312         /* Perform the binding */
2313         ret = iwl_mvm_binding_add_vif(mvm, vif);
2314         if (ret)
2315                 goto out_remove;
2316
2317         /* Send the bcast station. At this stage the TBTT and DTIM time events
2318          * are added and applied to the scheduler */
2319         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2320         if (ret)
2321                 goto out_unbind;
2322
2323         /* must be set before quota calculations */
2324         mvmvif->ap_ibss_active = true;
2325
2326         /* power updated needs to be done before quotas */
2327         iwl_mvm_power_update_mac(mvm);
2328
2329         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2330         if (ret)
2331                 goto out_quota_failed;
2332
2333         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2334         if (vif->p2p && mvm->p2p_device_vif)
2335                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2336
2337         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2338
2339         iwl_mvm_bt_coex_vif_change(mvm);
2340
2341         /* we don't support TDLS during DCM */
2342         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2343                 iwl_mvm_teardown_tdls_peers(mvm);
2344
2345         goto out_unlock;
2346
2347 out_quota_failed:
2348         iwl_mvm_power_update_mac(mvm);
2349         mvmvif->ap_ibss_active = false;
2350         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2351 out_unbind:
2352         iwl_mvm_binding_remove_vif(mvm, vif);
2353 out_remove:
2354         iwl_mvm_mac_ctxt_remove(mvm, vif);
2355 out_unlock:
2356         mutex_unlock(&mvm->mutex);
2357         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2358         return ret;
2359 }
2360
2361 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2362                                  struct ieee80211_vif *vif)
2363 {
2364         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2365         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2366
2367         iwl_mvm_prepare_mac_removal(mvm, vif);
2368
2369         mutex_lock(&mvm->mutex);
2370
2371         /* Handle AP stop while in CSA */
2372         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2373                 iwl_mvm_remove_time_event(mvm, mvmvif,
2374                                           &mvmvif->time_event_data);
2375                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2376         }
2377
2378         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2379                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2380                 mvm->csa_tx_block_bcn_timeout = 0;
2381         }
2382
2383         mvmvif->ap_ibss_active = false;
2384         mvm->ap_last_beacon_gp2 = 0;
2385
2386         iwl_mvm_bt_coex_vif_change(mvm);
2387
2388         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2389
2390         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2391         if (vif->p2p && mvm->p2p_device_vif)
2392                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2393
2394         iwl_mvm_update_quotas(mvm, false, NULL);
2395         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2396         iwl_mvm_binding_remove_vif(mvm, vif);
2397
2398         iwl_mvm_power_update_mac(mvm);
2399
2400         iwl_mvm_mac_ctxt_remove(mvm, vif);
2401
2402         mutex_unlock(&mvm->mutex);
2403 }
2404
2405 static void
2406 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2407                                  struct ieee80211_vif *vif,
2408                                  struct ieee80211_bss_conf *bss_conf,
2409                                  u32 changes)
2410 {
2411         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2412
2413         /* Changes will be applied when the AP/IBSS is started */
2414         if (!mvmvif->ap_ibss_active)
2415                 return;
2416
2417         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2418                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2419             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2420                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2421
2422         /* Need to send a new beacon template to the FW */
2423         if (changes & BSS_CHANGED_BEACON &&
2424             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2425                 IWL_WARN(mvm, "Failed updating beacon data\n");
2426
2427         if (changes & BSS_CHANGED_TXPOWER) {
2428                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2429                                 bss_conf->txpower);
2430                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2431         }
2432
2433 }
2434
2435 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2436                                      struct ieee80211_vif *vif,
2437                                      struct ieee80211_bss_conf *bss_conf,
2438                                      u32 changes)
2439 {
2440         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2441
2442         /*
2443          * iwl_mvm_bss_info_changed_station() might call
2444          * iwl_mvm_protect_session(), which reads directly from
2445          * the device (the system time), so make sure it is available.
2446          */
2447         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2448                 return;
2449
2450         mutex_lock(&mvm->mutex);
2451
2452         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2453                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2454
2455         switch (vif->type) {
2456         case NL80211_IFTYPE_STATION:
2457                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2458                 break;
2459         case NL80211_IFTYPE_AP:
2460         case NL80211_IFTYPE_ADHOC:
2461                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2462                 break;
2463         default:
2464                 /* shouldn't happen */
2465                 WARN_ON_ONCE(1);
2466         }
2467
2468         mutex_unlock(&mvm->mutex);
2469         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2470 }
2471
2472 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2473                                struct ieee80211_vif *vif,
2474                                struct ieee80211_scan_request *hw_req)
2475 {
2476         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2477         int ret;
2478
2479         if (hw_req->req.n_channels == 0 ||
2480             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2481                 return -EINVAL;
2482
2483         mutex_lock(&mvm->mutex);
2484         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2485         mutex_unlock(&mvm->mutex);
2486
2487         return ret;
2488 }
2489
2490 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2491                                        struct ieee80211_vif *vif)
2492 {
2493         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2494
2495         mutex_lock(&mvm->mutex);
2496
2497         /* Due to a race condition, it's possible that mac80211 asks
2498          * us to stop a hw_scan when it's already stopped.  This can
2499          * happen, for instance, if we stopped the scan ourselves,
2500          * called ieee80211_scan_completed() and the userspace called
2501          * cancel scan scan before ieee80211_scan_work() could run.
2502          * To handle that, simply return if the scan is not running.
2503         */
2504         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2505                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2506
2507         mutex_unlock(&mvm->mutex);
2508 }
2509
2510 static void
2511 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2512                                   struct ieee80211_sta *sta, u16 tids,
2513                                   int num_frames,
2514                                   enum ieee80211_frame_release_type reason,
2515                                   bool more_data)
2516 {
2517         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2518
2519         /* Called when we need to transmit (a) frame(s) from mac80211 */
2520
2521         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2522                                           tids, more_data, false);
2523 }
2524
2525 static void
2526 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2527                                     struct ieee80211_sta *sta, u16 tids,
2528                                     int num_frames,
2529                                     enum ieee80211_frame_release_type reason,
2530                                     bool more_data)
2531 {
2532         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2533
2534         /* Called when we need to transmit (a) frame(s) from agg queue */
2535
2536         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2537                                           tids, more_data, true);
2538 }
2539
2540 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2541                                    struct ieee80211_vif *vif,
2542                                    enum sta_notify_cmd cmd,
2543                                    struct ieee80211_sta *sta)
2544 {
2545         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2546         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2547         unsigned long txqs = 0, tids = 0;
2548         int tid;
2549
2550         spin_lock_bh(&mvmsta->lock);
2551         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2552                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2553
2554                 if (tid_data->state != IWL_AGG_ON &&
2555                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2556                         continue;
2557
2558                 __set_bit(tid_data->txq_id, &txqs);
2559
2560                 if (iwl_mvm_tid_queued(tid_data) == 0)
2561                         continue;
2562
2563                 __set_bit(tid, &tids);
2564         }
2565
2566         switch (cmd) {
2567         case STA_NOTIFY_SLEEP:
2568                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2569                         ieee80211_sta_block_awake(hw, sta, true);
2570
2571                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2572                         ieee80211_sta_set_buffered(sta, tid, true);
2573
2574                 if (txqs)
2575                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2576                 /*
2577                  * The fw updates the STA to be asleep. Tx packets on the Tx
2578                  * queues to this station will not be transmitted. The fw will
2579                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2580                  */
2581                 break;
2582         case STA_NOTIFY_AWAKE:
2583                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2584                         break;
2585
2586                 if (txqs)
2587                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2588                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2589                 break;
2590         default:
2591                 break;
2592         }
2593         spin_unlock_bh(&mvmsta->lock);
2594 }
2595
2596 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2597                                        struct ieee80211_vif *vif,
2598                                        struct ieee80211_sta *sta)
2599 {
2600         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2601         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2602         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2603
2604         /*
2605          * This is called before mac80211 does RCU synchronisation,
2606          * so here we already invalidate our internal RCU-protected
2607          * station pointer. The rest of the code will thus no longer
2608          * be able to find the station this way, and we don't rely
2609          * on further RCU synchronisation after the sta_state()
2610          * callback deleted the station.
2611          */
2612         mutex_lock(&mvm->mutex);
2613         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2614                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2615                                    ERR_PTR(-ENOENT));
2616
2617         if (mvm_sta->vif->type == NL80211_IFTYPE_AP) {
2618                 mvmvif->ap_assoc_sta_count--;
2619                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2620         }
2621
2622         mutex_unlock(&mvm->mutex);
2623 }
2624
2625 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2626                                 const u8 *bssid)
2627 {
2628         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2629                 return;
2630
2631         if (iwlwifi_mod_params.uapsd_disable) {
2632                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2633                 return;
2634         }
2635
2636         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2637 }
2638
2639 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2640                                  struct ieee80211_vif *vif,
2641                                  struct ieee80211_sta *sta,
2642                                  enum ieee80211_sta_state old_state,
2643                                  enum ieee80211_sta_state new_state)
2644 {
2645         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2646         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2647         int ret;
2648
2649         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2650                            sta->addr, old_state, new_state);
2651
2652         /* this would be a mac80211 bug ... but don't crash */
2653         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2654                 return -EINVAL;
2655
2656         /* if a STA is being removed, reuse its ID */
2657         flush_work(&mvm->sta_drained_wk);
2658
2659         mutex_lock(&mvm->mutex);
2660         if (old_state == IEEE80211_STA_NOTEXIST &&
2661             new_state == IEEE80211_STA_NONE) {
2662                 /*
2663                  * Firmware bug - it'll crash if the beacon interval is less
2664                  * than 16. We can't avoid connecting at all, so refuse the
2665                  * station state change, this will cause mac80211 to abandon
2666                  * attempts to connect to this AP, and eventually wpa_s will
2667                  * blacklist the AP...
2668                  */
2669                 if (vif->type == NL80211_IFTYPE_STATION &&
2670                     vif->bss_conf.beacon_int < 16) {
2671                         IWL_ERR(mvm,
2672                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2673                                 sta->addr, vif->bss_conf.beacon_int);
2674                         ret = -EINVAL;
2675                         goto out_unlock;
2676                 }
2677
2678                 if (sta->tdls &&
2679                     (vif->p2p ||
2680                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2681                                                 IWL_MVM_TDLS_STA_COUNT ||
2682                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2683                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2684                         ret = -EBUSY;
2685                         goto out_unlock;
2686                 }
2687
2688                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2689                 if (sta->tdls && ret == 0)
2690                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2691         } else if (old_state == IEEE80211_STA_NONE &&
2692                    new_state == IEEE80211_STA_AUTH) {
2693                 /*
2694                  * EBS may be disabled due to previous failures reported by FW.
2695                  * Reset EBS status here assuming environment has been changed.
2696                  */
2697                 mvm->last_ebs_successful = true;
2698                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2699                 ret = 0;
2700         } else if (old_state == IEEE80211_STA_AUTH &&
2701                    new_state == IEEE80211_STA_ASSOC) {
2702                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2703                 if (ret == 0)
2704                         iwl_mvm_rs_rate_init(mvm, sta,
2705                                              mvmvif->phy_ctxt->channel->band,
2706                                              true);
2707         } else if (old_state == IEEE80211_STA_ASSOC &&
2708                    new_state == IEEE80211_STA_AUTHORIZED) {
2709
2710                 /* we don't support TDLS during DCM */
2711                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2712                         iwl_mvm_teardown_tdls_peers(mvm);
2713
2714                 /* enable beacon filtering */
2715                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2716                 ret = 0;
2717         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2718                    new_state == IEEE80211_STA_ASSOC) {
2719                 /* disable beacon filtering */
2720                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2721                 ret = 0;
2722         } else if (old_state == IEEE80211_STA_ASSOC &&
2723                    new_state == IEEE80211_STA_AUTH) {
2724                 ret = 0;
2725         } else if (old_state == IEEE80211_STA_AUTH &&
2726                    new_state == IEEE80211_STA_NONE) {
2727                 ret = 0;
2728         } else if (old_state == IEEE80211_STA_NONE &&
2729                    new_state == IEEE80211_STA_NOTEXIST) {
2730                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2731                 if (sta->tdls)
2732                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2733         } else {
2734                 ret = -EIO;
2735         }
2736  out_unlock:
2737         mutex_unlock(&mvm->mutex);
2738
2739         if (sta->tdls && ret == 0) {
2740                 if (old_state == IEEE80211_STA_NOTEXIST &&
2741                     new_state == IEEE80211_STA_NONE)
2742                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2743                 else if (old_state == IEEE80211_STA_NONE &&
2744                          new_state == IEEE80211_STA_NOTEXIST)
2745                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2746         }
2747
2748         return ret;
2749 }
2750
2751 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2752 {
2753         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2754
2755         mvm->rts_threshold = value;
2756
2757         return 0;
2758 }
2759
2760 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2761                                   struct ieee80211_vif *vif,
2762                                   struct ieee80211_sta *sta, u32 changed)
2763 {
2764         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2765
2766         if (vif->type == NL80211_IFTYPE_STATION &&
2767             changed & IEEE80211_RC_NSS_CHANGED)
2768                 iwl_mvm_sf_update(mvm, vif, false);
2769 }
2770
2771 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2772                                struct ieee80211_vif *vif, u16 ac,
2773                                const struct ieee80211_tx_queue_params *params)
2774 {
2775         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2776         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2777
2778         mvmvif->queue_params[ac] = *params;
2779
2780         /*
2781          * No need to update right away, we'll get BSS_CHANGED_QOS
2782          * The exception is P2P_DEVICE interface which needs immediate update.
2783          */
2784         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2785                 int ret;
2786
2787                 mutex_lock(&mvm->mutex);
2788                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2789                 mutex_unlock(&mvm->mutex);
2790                 return ret;
2791         }
2792         return 0;
2793 }
2794
2795 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2796                                       struct ieee80211_vif *vif)
2797 {
2798         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2799         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2800                            200 + vif->bss_conf.beacon_int);
2801         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2802                                100 + vif->bss_conf.beacon_int);
2803
2804         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2805                 return;
2806
2807         /*
2808          * iwl_mvm_protect_session() reads directly from the device
2809          * (the system time), so make sure it is available.
2810          */
2811         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2812                 return;
2813
2814         mutex_lock(&mvm->mutex);
2815         /* Try really hard to protect the session and hear a beacon */
2816         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2817         mutex_unlock(&mvm->mutex);
2818
2819         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2820 }
2821
2822 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2823                                         struct ieee80211_vif *vif,
2824                                         struct cfg80211_sched_scan_request *req,
2825                                         struct ieee80211_scan_ies *ies)
2826 {
2827         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2828
2829         int ret;
2830
2831         mutex_lock(&mvm->mutex);
2832
2833         if (!vif->bss_conf.idle) {
2834                 ret = -EBUSY;
2835                 goto out;
2836         }
2837
2838         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2839
2840 out:
2841         mutex_unlock(&mvm->mutex);
2842         return ret;
2843 }
2844
2845 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2846                                        struct ieee80211_vif *vif)
2847 {
2848         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2849         int ret;
2850
2851         mutex_lock(&mvm->mutex);
2852
2853         /* Due to a race condition, it's possible that mac80211 asks
2854          * us to stop a sched_scan when it's already stopped.  This
2855          * can happen, for instance, if we stopped the scan ourselves,
2856          * called ieee80211_sched_scan_stopped() and the userspace called
2857          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2858          * could run.  To handle this, simply return if the scan is
2859          * not running.
2860         */
2861         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2862                 mutex_unlock(&mvm->mutex);
2863                 return 0;
2864         }
2865
2866         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2867         mutex_unlock(&mvm->mutex);
2868         iwl_mvm_wait_for_async_handlers(mvm);
2869
2870         return ret;
2871 }
2872
2873 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2874                                enum set_key_cmd cmd,
2875                                struct ieee80211_vif *vif,
2876                                struct ieee80211_sta *sta,
2877                                struct ieee80211_key_conf *key)
2878 {
2879         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2880         int ret;
2881
2882         if (iwlwifi_mod_params.sw_crypto) {
2883                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2884                 return -EOPNOTSUPP;
2885         }
2886
2887         switch (key->cipher) {
2888         case WLAN_CIPHER_SUITE_TKIP:
2889                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2890                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2891                 break;
2892         case WLAN_CIPHER_SUITE_CCMP:
2893                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2894                 break;
2895         case WLAN_CIPHER_SUITE_AES_CMAC:
2896                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2897                 break;
2898         case WLAN_CIPHER_SUITE_WEP40:
2899         case WLAN_CIPHER_SUITE_WEP104:
2900                 /* For non-client mode, only use WEP keys for TX as we probably
2901                  * don't have a station yet anyway and would then have to keep
2902                  * track of the keys, linking them to each of the clients/peers
2903                  * as they appear. For now, don't do that, for performance WEP
2904                  * offload doesn't really matter much, but we need it for some
2905                  * other offload features in client mode.
2906                  */
2907                 if (vif->type != NL80211_IFTYPE_STATION)
2908                         return 0;
2909                 break;
2910         default:
2911                 /* currently FW supports only one optional cipher scheme */
2912                 if (hw->n_cipher_schemes &&
2913                     hw->cipher_schemes->cipher == key->cipher)
2914                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2915                 else
2916                         return -EOPNOTSUPP;
2917         }
2918
2919         mutex_lock(&mvm->mutex);
2920
2921         switch (cmd) {
2922         case SET_KEY:
2923                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2924                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2925                         /*
2926                          * GTK on AP interface is a TX-only key, return 0;
2927                          * on IBSS they're per-station and because we're lazy
2928                          * we don't support them for RX, so do the same.
2929                          */
2930                         ret = 0;
2931                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2932                         break;
2933                 }
2934
2935                 /* During FW restart, in order to restore the state as it was,
2936                  * don't try to reprogram keys we previously failed for.
2937                  */
2938                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2939                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2940                         IWL_DEBUG_MAC80211(mvm,
2941                                            "skip invalid idx key programming during restart\n");
2942                         ret = 0;
2943                         break;
2944                 }
2945
2946                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2947                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key,
2948                                           test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2949                                                    &mvm->status));
2950                 if (ret) {
2951                         IWL_WARN(mvm, "set key failed\n");
2952                         /*
2953                          * can't add key for RX, but we don't need it
2954                          * in the device for TX so still return 0
2955                          */
2956                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2957                         ret = 0;
2958                 }
2959
2960                 break;
2961         case DISABLE_KEY:
2962                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2963                         ret = 0;
2964                         break;
2965                 }
2966
2967                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2968                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2969                 break;
2970         default:
2971                 ret = -EINVAL;
2972         }
2973
2974         mutex_unlock(&mvm->mutex);
2975         return ret;
2976 }
2977
2978 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2979                                         struct ieee80211_vif *vif,
2980                                         struct ieee80211_key_conf *keyconf,
2981                                         struct ieee80211_sta *sta,
2982                                         u32 iv32, u16 *phase1key)
2983 {
2984         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2985
2986         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2987                 return;
2988
2989         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2990 }
2991
2992
2993 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2994                                struct iwl_rx_packet *pkt, void *data)
2995 {
2996         struct iwl_mvm *mvm =
2997                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2998         struct iwl_hs20_roc_res *resp;
2999         int resp_len = iwl_rx_packet_payload_len(pkt);
3000         struct iwl_mvm_time_event_data *te_data = data;
3001
3002         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
3003                 return true;
3004
3005         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
3006                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
3007                 return true;
3008         }
3009
3010         resp = (void *)pkt->data;
3011
3012         IWL_DEBUG_TE(mvm,
3013                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
3014                      resp->status, resp->event_unique_id);
3015
3016         te_data->uid = le32_to_cpu(resp->event_unique_id);
3017         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
3018                      te_data->uid);
3019
3020         spin_lock_bh(&mvm->time_event_lock);
3021         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
3022         spin_unlock_bh(&mvm->time_event_lock);
3023
3024         return true;
3025 }
3026
3027 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 200
3028 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
3029                                     struct ieee80211_channel *channel,
3030                                     struct ieee80211_vif *vif,
3031                                     int duration)
3032 {
3033         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
3034         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3035         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
3036         static const u16 time_event_response[] = { HOT_SPOT_CMD };
3037         struct iwl_notification_wait wait_time_event;
3038         struct iwl_hs20_roc_req aux_roc_req = {
3039                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
3040                 .id_and_color =
3041                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
3042                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
3043                 /* Set the channel info data */
3044                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
3045                         PHY_BAND_24 : PHY_BAND_5,
3046                 .channel_info.channel = channel->hw_value,
3047                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
3048                 /* Set the time and duration */
3049                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
3050                 .apply_time_max_delay =
3051                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
3052                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
3053          };
3054
3055         /* Set the node address */
3056         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3057
3058         lockdep_assert_held(&mvm->mutex);
3059
3060         spin_lock_bh(&mvm->time_event_lock);
3061
3062         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3063                 spin_unlock_bh(&mvm->time_event_lock);
3064                 return -EIO;
3065         }
3066
3067         te_data->vif = vif;
3068         te_data->duration = duration;
3069         te_data->id = HOT_SPOT_CMD;
3070
3071         spin_unlock_bh(&mvm->time_event_lock);
3072
3073         /*
3074          * Use a notification wait, which really just processes the
3075          * command response and doesn't wait for anything, in order
3076          * to be able to process the response and get the UID inside
3077          * the RX path. Using CMD_WANT_SKB doesn't work because it
3078          * stores the buffer and then wakes up this thread, by which
3079          * time another notification (that the time event started)
3080          * might already be processed unsuccessfully.
3081          */
3082         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3083                                    time_event_response,
3084                                    ARRAY_SIZE(time_event_response),
3085                                    iwl_mvm_rx_aux_roc, te_data);
3086
3087         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3088                                    &aux_roc_req);
3089
3090         if (res) {
3091                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3092                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3093                 goto out_clear_te;
3094         }
3095
3096         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3097         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3098         /* should never fail */
3099         WARN_ON_ONCE(res);
3100
3101         if (res) {
3102  out_clear_te:
3103                 spin_lock_bh(&mvm->time_event_lock);
3104                 iwl_mvm_te_clear_data(mvm, te_data);
3105                 spin_unlock_bh(&mvm->time_event_lock);
3106         }
3107
3108         return res;
3109 }
3110
3111 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3112                        struct ieee80211_vif *vif,
3113                        struct ieee80211_channel *channel,
3114                        int duration,
3115                        enum ieee80211_roc_type type)
3116 {
3117         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3118         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3119         struct cfg80211_chan_def chandef;
3120         struct iwl_mvm_phy_ctxt *phy_ctxt;
3121         int ret, i;
3122
3123         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3124                            duration, type);
3125
3126         flush_work(&mvm->roc_done_wk);
3127
3128         mutex_lock(&mvm->mutex);
3129
3130         switch (vif->type) {
3131         case NL80211_IFTYPE_STATION:
3132                 if (fw_has_capa(&mvm->fw->ucode_capa,
3133                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3134                         /* Use aux roc framework (HS20) */
3135                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3136                                                        vif, duration);
3137                         goto out_unlock;
3138                 }
3139                 IWL_ERR(mvm, "hotspot not supported\n");
3140                 ret = -EINVAL;
3141                 goto out_unlock;
3142         case NL80211_IFTYPE_P2P_DEVICE:
3143                 /* handle below */
3144                 break;
3145         default:
3146                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3147                 ret = -EINVAL;
3148                 goto out_unlock;
3149         }
3150
3151         for (i = 0; i < NUM_PHY_CTX; i++) {
3152                 phy_ctxt = &mvm->phy_ctxts[i];
3153                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3154                         continue;
3155
3156                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3157                         /*
3158                          * Unbind the P2P_DEVICE from the current PHY context,
3159                          * and if the PHY context is not used remove it.
3160                          */
3161                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3162                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3163                                 goto out_unlock;
3164
3165                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3166
3167                         /* Bind the P2P_DEVICE to the current PHY Context */
3168                         mvmvif->phy_ctxt = phy_ctxt;
3169
3170                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3171                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3172                                 goto out_unlock;
3173
3174                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3175                         goto schedule_time_event;
3176                 }
3177         }
3178
3179         /* Need to update the PHY context only if the ROC channel changed */
3180         if (channel == mvmvif->phy_ctxt->channel)
3181                 goto schedule_time_event;
3182
3183         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3184
3185         /*
3186          * Change the PHY context configuration as it is currently referenced
3187          * only by the P2P Device MAC
3188          */
3189         if (mvmvif->phy_ctxt->ref == 1) {
3190                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3191                                                &chandef, 1, 1);
3192                 if (ret)
3193                         goto out_unlock;
3194         } else {
3195                 /*
3196                  * The PHY context is shared with other MACs. Need to remove the
3197                  * P2P Device from the binding, allocate an new PHY context and
3198                  * create a new binding
3199                  */
3200                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3201                 if (!phy_ctxt) {
3202                         ret = -ENOSPC;
3203                         goto out_unlock;
3204                 }
3205
3206                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3207                                                1, 1);
3208                 if (ret) {
3209                         IWL_ERR(mvm, "Failed to change PHY context\n");
3210                         goto out_unlock;
3211                 }
3212
3213                 /* Unbind the P2P_DEVICE from the current PHY context */
3214                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3215                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3216                         goto out_unlock;
3217
3218                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3219
3220                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3221                 mvmvif->phy_ctxt = phy_ctxt;
3222
3223                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3224                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3225                         goto out_unlock;
3226
3227                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3228         }
3229
3230 schedule_time_event:
3231         /* Schedule the time events */
3232         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3233
3234 out_unlock:
3235         mutex_unlock(&mvm->mutex);
3236         IWL_DEBUG_MAC80211(mvm, "leave\n");
3237         return ret;
3238 }
3239
3240 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3241 {
3242         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3243
3244         IWL_DEBUG_MAC80211(mvm, "enter\n");
3245
3246         mutex_lock(&mvm->mutex);
3247         iwl_mvm_stop_roc(mvm);
3248         mutex_unlock(&mvm->mutex);
3249
3250         IWL_DEBUG_MAC80211(mvm, "leave\n");
3251         return 0;
3252 }
3253
3254 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3255                                  struct ieee80211_chanctx_conf *ctx)
3256 {
3257         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3258         struct iwl_mvm_phy_ctxt *phy_ctxt;
3259         int ret;
3260
3261         lockdep_assert_held(&mvm->mutex);
3262
3263         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3264
3265         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3266         if (!phy_ctxt) {
3267                 ret = -ENOSPC;
3268                 goto out;
3269         }
3270
3271         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3272                                        ctx->rx_chains_static,
3273                                        ctx->rx_chains_dynamic);
3274         if (ret) {
3275                 IWL_ERR(mvm, "Failed to add PHY context\n");
3276                 goto out;
3277         }
3278
3279         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3280         *phy_ctxt_id = phy_ctxt->id;
3281 out:
3282         return ret;
3283 }
3284
3285 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3286                                struct ieee80211_chanctx_conf *ctx)
3287 {
3288         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3289         int ret;
3290
3291         mutex_lock(&mvm->mutex);
3292         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3293         mutex_unlock(&mvm->mutex);
3294
3295         return ret;
3296 }
3297
3298 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3299                                      struct ieee80211_chanctx_conf *ctx)
3300 {
3301         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3302         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3303
3304         lockdep_assert_held(&mvm->mutex);
3305
3306         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3307 }
3308
3309 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3310                                    struct ieee80211_chanctx_conf *ctx)
3311 {
3312         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3313
3314         mutex_lock(&mvm->mutex);
3315         __iwl_mvm_remove_chanctx(mvm, ctx);
3316         mutex_unlock(&mvm->mutex);
3317 }
3318
3319 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3320                                    struct ieee80211_chanctx_conf *ctx,
3321                                    u32 changed)
3322 {
3323         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3324         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3325         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3326
3327         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3328                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3329                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3330                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3331                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3332                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3333                       phy_ctxt->ref, changed))
3334                 return;
3335
3336         mutex_lock(&mvm->mutex);
3337         iwl_mvm_bt_coex_vif_change(mvm);
3338         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3339                                  ctx->rx_chains_static,
3340                                  ctx->rx_chains_dynamic);
3341         mutex_unlock(&mvm->mutex);
3342 }
3343
3344 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3345                                         struct ieee80211_vif *vif,
3346                                         struct ieee80211_chanctx_conf *ctx,
3347                                         bool switching_chanctx)
3348 {
3349         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3350         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3351         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3352         int ret;
3353
3354         lockdep_assert_held(&mvm->mutex);
3355
3356         mvmvif->phy_ctxt = phy_ctxt;
3357
3358         switch (vif->type) {
3359         case NL80211_IFTYPE_AP:
3360                 /* only needed if we're switching chanctx (i.e. during CSA) */
3361                 if (switching_chanctx) {
3362                         mvmvif->ap_ibss_active = true;
3363                         break;
3364                 }
3365         case NL80211_IFTYPE_ADHOC:
3366                 /*
3367                  * The AP binding flow is handled as part of the start_ap flow
3368                  * (in bss_info_changed), similarly for IBSS.
3369                  */
3370                 ret = 0;
3371                 goto out;
3372         case NL80211_IFTYPE_STATION:
3373                 break;
3374         case NL80211_IFTYPE_MONITOR:
3375                 /* always disable PS when a monitor interface is active */
3376                 mvmvif->ps_disabled = true;
3377                 break;
3378         default:
3379                 ret = -EINVAL;
3380                 goto out;
3381         }
3382
3383         ret = iwl_mvm_binding_add_vif(mvm, vif);
3384         if (ret)
3385                 goto out;
3386
3387         /*
3388          * Power state must be updated before quotas,
3389          * otherwise fw will complain.
3390          */
3391         iwl_mvm_power_update_mac(mvm);
3392
3393         /* Setting the quota at this stage is only required for monitor
3394          * interfaces. For the other types, the bss_info changed flow
3395          * will handle quota settings.
3396          */
3397         if (vif->type == NL80211_IFTYPE_MONITOR) {
3398                 mvmvif->monitor_active = true;
3399                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3400                 if (ret)
3401                         goto out_remove_binding;
3402         }
3403
3404         /* Handle binding during CSA */
3405         if (vif->type == NL80211_IFTYPE_AP) {
3406                 iwl_mvm_update_quotas(mvm, false, NULL);
3407                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3408         }
3409
3410         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3411                 u32 duration = 2 * vif->bss_conf.beacon_int;
3412
3413                 /* iwl_mvm_protect_session() reads directly from the
3414                  * device (the system time), so make sure it is
3415                  * available.
3416                  */
3417                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3418                 if (ret)
3419                         goto out_remove_binding;
3420
3421                 /* Protect the session to make sure we hear the first
3422                  * beacon on the new channel.
3423                  */
3424                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3425                                         vif->bss_conf.beacon_int / 2,
3426                                         true);
3427
3428                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3429
3430                 iwl_mvm_update_quotas(mvm, false, NULL);
3431         }
3432
3433         goto out;
3434
3435 out_remove_binding:
3436         iwl_mvm_binding_remove_vif(mvm, vif);
3437         iwl_mvm_power_update_mac(mvm);
3438 out:
3439         if (ret)
3440                 mvmvif->phy_ctxt = NULL;
3441         return ret;
3442 }
3443 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3444                                       struct ieee80211_vif *vif,
3445                                       struct ieee80211_chanctx_conf *ctx)
3446 {
3447         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3448         int ret;
3449
3450         mutex_lock(&mvm->mutex);
3451         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3452         mutex_unlock(&mvm->mutex);
3453
3454         return ret;
3455 }
3456
3457 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3458                                            struct ieee80211_vif *vif,
3459                                            struct ieee80211_chanctx_conf *ctx,
3460                                            bool switching_chanctx)
3461 {
3462         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3463         struct ieee80211_vif *disabled_vif = NULL;
3464
3465         lockdep_assert_held(&mvm->mutex);
3466
3467         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3468
3469         switch (vif->type) {
3470         case NL80211_IFTYPE_ADHOC:
3471                 goto out;
3472         case NL80211_IFTYPE_MONITOR:
3473                 mvmvif->monitor_active = false;
3474                 mvmvif->ps_disabled = false;
3475                 break;
3476         case NL80211_IFTYPE_AP:
3477                 /* This part is triggered only during CSA */
3478                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3479                         goto out;
3480
3481                 mvmvif->csa_countdown = false;
3482
3483                 /* Set CS bit on all the stations */
3484                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3485
3486                 /* Save blocked iface, the timeout is set on the next beacon */
3487                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3488
3489                 mvmvif->ap_ibss_active = false;
3490                 break;
3491         case NL80211_IFTYPE_STATION:
3492                 if (!switching_chanctx)
3493                         break;
3494
3495                 disabled_vif = vif;
3496
3497                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3498                 break;
3499         default:
3500                 break;
3501         }
3502
3503         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3504         iwl_mvm_binding_remove_vif(mvm, vif);
3505
3506 out:
3507         mvmvif->phy_ctxt = NULL;
3508         iwl_mvm_power_update_mac(mvm);
3509 }
3510
3511 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3512                                          struct ieee80211_vif *vif,
3513                                          struct ieee80211_chanctx_conf *ctx)
3514 {
3515         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3516
3517         mutex_lock(&mvm->mutex);
3518         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3519         mutex_unlock(&mvm->mutex);
3520 }
3521
3522 static int
3523 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3524                                 struct ieee80211_vif_chanctx_switch *vifs)
3525 {
3526         int ret;
3527
3528         mutex_lock(&mvm->mutex);
3529         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3530         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3531
3532         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3533         if (ret) {
3534                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3535                 goto out_reassign;
3536         }
3537
3538         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3539                                            true);
3540         if (ret) {
3541                 IWL_ERR(mvm,
3542                         "failed to assign new_ctx during channel switch\n");
3543                 goto out_remove;
3544         }
3545
3546         /* we don't support TDLS during DCM - can be caused by channel switch */
3547         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3548                 iwl_mvm_teardown_tdls_peers(mvm);
3549
3550         goto out;
3551
3552 out_remove:
3553         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3554
3555 out_reassign:
3556         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3557                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3558                 goto out_restart;
3559         }
3560
3561         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3562                                          true)) {
3563                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3564                 goto out_restart;
3565         }
3566
3567         goto out;
3568
3569 out_restart:
3570         /* things keep failing, better restart the hw */
3571         iwl_mvm_nic_restart(mvm, false);
3572
3573 out:
3574         mutex_unlock(&mvm->mutex);
3575
3576         return ret;
3577 }
3578
3579 static int
3580 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3581                                     struct ieee80211_vif_chanctx_switch *vifs)
3582 {
3583         int ret;
3584
3585         mutex_lock(&mvm->mutex);
3586         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3587
3588         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3589                                            true);
3590         if (ret) {
3591                 IWL_ERR(mvm,
3592                         "failed to assign new_ctx during channel switch\n");
3593                 goto out_reassign;
3594         }
3595
3596         goto out;
3597
3598 out_reassign:
3599         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3600                                          true)) {
3601                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3602                 goto out_restart;
3603         }
3604
3605         goto out;
3606
3607 out_restart:
3608         /* things keep failing, better restart the hw */
3609         iwl_mvm_nic_restart(mvm, false);
3610
3611 out:
3612         mutex_unlock(&mvm->mutex);
3613
3614         return ret;
3615 }
3616
3617 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3618                                       struct ieee80211_vif_chanctx_switch *vifs,
3619                                       int n_vifs,
3620                                       enum ieee80211_chanctx_switch_mode mode)
3621 {
3622         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3623         int ret;
3624
3625         /* we only support a single-vif right now */
3626         if (n_vifs > 1)
3627                 return -EOPNOTSUPP;
3628
3629         switch (mode) {
3630         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3631                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3632                 break;
3633         case CHANCTX_SWMODE_REASSIGN_VIF:
3634                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3635                 break;
3636         default:
3637                 ret = -EOPNOTSUPP;
3638                 break;
3639         }
3640
3641         return ret;
3642 }
3643
3644 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3645                            struct ieee80211_sta *sta,
3646                            bool set)
3647 {
3648         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3649         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3650
3651         if (!mvm_sta || !mvm_sta->vif) {
3652                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3653                 return -EINVAL;
3654         }
3655
3656         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3657 }
3658
3659 #ifdef CONFIG_NL80211_TESTMODE
3660 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3661         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3662         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3663         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3664 };
3665
3666 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3667                                       struct ieee80211_vif *vif,
3668                                       void *data, int len)
3669 {
3670         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3671         int err;
3672         u32 noa_duration;
3673
3674         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3675         if (err)
3676                 return err;
3677
3678         if (!tb[IWL_MVM_TM_ATTR_CMD])
3679                 return -EINVAL;
3680
3681         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3682         case IWL_MVM_TM_CMD_SET_NOA:
3683                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3684                     !vif->bss_conf.enable_beacon ||
3685                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3686                         return -EINVAL;
3687
3688                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3689                 if (noa_duration >= vif->bss_conf.beacon_int)
3690                         return -EINVAL;
3691
3692                 mvm->noa_duration = noa_duration;
3693                 mvm->noa_vif = vif;
3694
3695                 return iwl_mvm_update_quotas(mvm, false, NULL);
3696         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3697                 /* must be associated client vif - ignore authorized */
3698                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3699                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3700                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3701                         return -EINVAL;
3702
3703                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3704                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3705                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3706         }
3707
3708         return -EOPNOTSUPP;
3709 }
3710
3711 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3712                                     struct ieee80211_vif *vif,
3713                                     void *data, int len)
3714 {
3715         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3716         int err;
3717
3718         mutex_lock(&mvm->mutex);
3719         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3720         mutex_unlock(&mvm->mutex);
3721
3722         return err;
3723 }
3724 #endif
3725
3726 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3727                                    struct ieee80211_vif *vif,
3728                                    struct ieee80211_channel_switch *chsw)
3729 {
3730         /* By implementing this operation, we prevent mac80211 from
3731          * starting its own channel switch timer, so that we can call
3732          * ieee80211_chswitch_done() ourselves at the right time
3733          * (which is when the absence time event starts).
3734          */
3735
3736         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3737                            "dummy channel switch op\n");
3738 }
3739
3740 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3741                                       struct ieee80211_vif *vif,
3742                                       struct ieee80211_channel_switch *chsw)
3743 {
3744         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3745         struct ieee80211_vif *csa_vif;
3746         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3747         u32 apply_time;
3748         int ret;
3749
3750         mutex_lock(&mvm->mutex);
3751
3752         mvmvif->csa_failed = false;
3753
3754         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3755                            chsw->chandef.center_freq1);
3756
3757         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3758
3759         switch (vif->type) {
3760         case NL80211_IFTYPE_AP:
3761                 csa_vif =
3762                         rcu_dereference_protected(mvm->csa_vif,
3763                                                   lockdep_is_held(&mvm->mutex));
3764                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3765                               "Another CSA is already in progress")) {
3766                         ret = -EBUSY;
3767                         goto out_unlock;
3768                 }
3769
3770                 rcu_assign_pointer(mvm->csa_vif, vif);
3771
3772                 if (WARN_ONCE(mvmvif->csa_countdown,
3773                               "Previous CSA countdown didn't complete")) {
3774                         ret = -EBUSY;
3775                         goto out_unlock;
3776                 }
3777
3778                 break;
3779         case NL80211_IFTYPE_STATION:
3780                 /* Schedule the time event to a bit before beacon 1,
3781                  * to make sure we're in the new channel when the
3782                  * GO/AP arrives.
3783                  */
3784                 apply_time = chsw->device_timestamp +
3785                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3786                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3787
3788                 if (chsw->block_tx)
3789                         iwl_mvm_csa_client_absent(mvm, vif);
3790
3791                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3792                                             apply_time);
3793                 if (mvmvif->bf_data.bf_enabled) {
3794                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3795                         if (ret)
3796                                 goto out_unlock;
3797                 }
3798
3799                 break;
3800         default:
3801                 break;
3802         }
3803
3804         mvmvif->ps_disabled = true;
3805
3806         ret = iwl_mvm_power_update_ps(mvm);
3807         if (ret)
3808                 goto out_unlock;
3809
3810         /* we won't be on this channel any longer */
3811         iwl_mvm_teardown_tdls_peers(mvm);
3812
3813 out_unlock:
3814         mutex_unlock(&mvm->mutex);
3815
3816         return ret;
3817 }
3818
3819 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3820                                        struct ieee80211_vif *vif)
3821 {
3822         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3823         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3824         int ret;
3825
3826         mutex_lock(&mvm->mutex);
3827
3828         if (mvmvif->csa_failed) {
3829                 mvmvif->csa_failed = false;
3830                 ret = -EIO;
3831                 goto out_unlock;
3832         }
3833
3834         if (vif->type == NL80211_IFTYPE_STATION) {
3835                 struct iwl_mvm_sta *mvmsta;
3836
3837                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3838                                                           mvmvif->ap_sta_id);
3839
3840                 if (WARN_ON(!mvmsta)) {
3841                         ret = -EIO;
3842                         goto out_unlock;
3843                 }
3844
3845                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3846
3847                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3848
3849                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3850                 if (ret)
3851                         goto out_unlock;
3852
3853                 iwl_mvm_stop_session_protection(mvm, vif);
3854         }
3855
3856         mvmvif->ps_disabled = false;
3857
3858         ret = iwl_mvm_power_update_ps(mvm);
3859
3860 out_unlock:
3861         mutex_unlock(&mvm->mutex);
3862
3863         return ret;
3864 }
3865
3866 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3867                               struct ieee80211_vif *vif, u32 queues, bool drop)
3868 {
3869         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3870         struct iwl_mvm_vif *mvmvif;
3871         struct iwl_mvm_sta *mvmsta;
3872         struct ieee80211_sta *sta;
3873         int i;
3874         u32 msk = 0;
3875
3876         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3877                 return;
3878
3879         mutex_lock(&mvm->mutex);
3880         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3881
3882         /* flush the AP-station and all TDLS peers */
3883         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3884                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3885                                                 lockdep_is_held(&mvm->mutex));
3886                 if (IS_ERR_OR_NULL(sta))
3887                         continue;
3888
3889                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3890                 if (mvmsta->vif != vif)
3891                         continue;
3892
3893                 /* make sure only TDLS peers or the AP are flushed */
3894                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3895
3896                 msk |= mvmsta->tfd_queue_msk;
3897         }
3898
3899         if (drop) {
3900                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3901                         IWL_ERR(mvm, "flush request fail\n");
3902                 mutex_unlock(&mvm->mutex);
3903         } else {
3904                 mutex_unlock(&mvm->mutex);
3905
3906                 /* this can take a while, and we may need/want other operations
3907                  * to succeed while doing this, so do it without the mutex held
3908                  */
3909                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3910         }
3911 }
3912
3913 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3914                                   struct survey_info *survey)
3915 {
3916         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3917         int ret;
3918
3919         memset(survey, 0, sizeof(*survey));
3920
3921         /* only support global statistics right now */
3922         if (idx != 0)
3923                 return -ENOENT;
3924
3925         if (fw_has_capa(&mvm->fw->ucode_capa,
3926                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3927                 return -ENOENT;
3928
3929         mutex_lock(&mvm->mutex);
3930
3931         if (mvm->ucode_loaded) {
3932                 ret = iwl_mvm_request_statistics(mvm, false);
3933                 if (ret)
3934                         goto out;
3935         }
3936
3937         survey->filled = SURVEY_INFO_TIME |
3938                          SURVEY_INFO_TIME_RX |
3939                          SURVEY_INFO_TIME_TX |
3940                          SURVEY_INFO_TIME_SCAN;
3941         survey->time = mvm->accu_radio_stats.on_time_rf +
3942                        mvm->radio_stats.on_time_rf;
3943         do_div(survey->time, USEC_PER_MSEC);
3944
3945         survey->time_rx = mvm->accu_radio_stats.rx_time +
3946                           mvm->radio_stats.rx_time;
3947         do_div(survey->time_rx, USEC_PER_MSEC);
3948
3949         survey->time_tx = mvm->accu_radio_stats.tx_time +
3950                           mvm->radio_stats.tx_time;
3951         do_div(survey->time_tx, USEC_PER_MSEC);
3952
3953         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3954                             mvm->radio_stats.on_time_scan;
3955         do_div(survey->time_scan, USEC_PER_MSEC);
3956
3957         ret = 0;
3958  out:
3959         mutex_unlock(&mvm->mutex);
3960         return ret;
3961 }
3962
3963 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3964                                        struct ieee80211_vif *vif,
3965                                        struct ieee80211_sta *sta,
3966                                        struct station_info *sinfo)
3967 {
3968         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3969         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3970         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3971
3972         if (fw_has_capa(&mvm->fw->ucode_capa,
3973                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3974                 return;
3975
3976         /* if beacon filtering isn't on mac80211 does it anyway */
3977         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3978                 return;
3979
3980         if (!vif->bss_conf.assoc)
3981                 return;
3982
3983         mutex_lock(&mvm->mutex);
3984
3985         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3986                 goto unlock;
3987
3988         if (iwl_mvm_request_statistics(mvm, false))
3989                 goto unlock;
3990
3991         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3992                            mvmvif->beacon_stats.accu_num_beacons;
3993         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3994         if (mvmvif->beacon_stats.avg_signal) {
3995                 /* firmware only reports a value after RXing a few beacons */
3996                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3997                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3998         }
3999  unlock:
4000         mutex_unlock(&mvm->mutex);
4001 }
4002
4003 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4004                                         struct ieee80211_vif *vif,
4005                                         const struct ieee80211_event *event)
4006 {
4007 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4008         do {                                                    \
4009                 if ((_cnt) && --(_cnt))                         \
4010                         break;                                  \
4011                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4012         } while (0)
4013
4014         struct iwl_fw_dbg_trigger_tlv *trig;
4015         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4016
4017         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4018                 return;
4019
4020         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4021         trig_mlme = (void *)trig->data;
4022         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4023                 return;
4024
4025         if (event->u.mlme.data == ASSOC_EVENT) {
4026                 if (event->u.mlme.status == MLME_DENIED)
4027                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4028                                            trig_mlme->stop_assoc_denied,
4029                                            "DENIED ASSOC: reason %d",
4030                                             event->u.mlme.reason);
4031                 else if (event->u.mlme.status == MLME_TIMEOUT)
4032                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4033                                            trig_mlme->stop_assoc_timeout,
4034                                            "ASSOC TIMEOUT");
4035         } else if (event->u.mlme.data == AUTH_EVENT) {
4036                 if (event->u.mlme.status == MLME_DENIED)
4037                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4038                                            trig_mlme->stop_auth_denied,
4039                                            "DENIED AUTH: reason %d",
4040                                            event->u.mlme.reason);
4041                 else if (event->u.mlme.status == MLME_TIMEOUT)
4042                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4043                                            trig_mlme->stop_auth_timeout,
4044                                            "AUTH TIMEOUT");
4045         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4046                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4047                                    trig_mlme->stop_rx_deauth,
4048                                    "DEAUTH RX %d", event->u.mlme.reason);
4049         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4050                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4051                                    trig_mlme->stop_tx_deauth,
4052                                    "DEAUTH TX %d", event->u.mlme.reason);
4053         }
4054 #undef CHECK_MLME_TRIGGER
4055 }
4056
4057 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4058                                           struct ieee80211_vif *vif,
4059                                           const struct ieee80211_event *event)
4060 {
4061         struct iwl_fw_dbg_trigger_tlv *trig;
4062         struct iwl_fw_dbg_trigger_ba *ba_trig;
4063
4064         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4065                 return;
4066
4067         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4068         ba_trig = (void *)trig->data;
4069         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4070                 return;
4071
4072         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4073                 return;
4074
4075         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4076                                     "BAR received from %pM, tid %d, ssn %d",
4077                                     event->u.ba.sta->addr, event->u.ba.tid,
4078                                     event->u.ba.ssn);
4079 }
4080
4081 static void
4082 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4083                                      struct ieee80211_vif *vif,
4084                                      const struct ieee80211_event *event)
4085 {
4086         struct iwl_fw_dbg_trigger_tlv *trig;
4087         struct iwl_fw_dbg_trigger_ba *ba_trig;
4088
4089         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4090                 return;
4091
4092         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4093         ba_trig = (void *)trig->data;
4094         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4095                 return;
4096
4097         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4098                 return;
4099
4100         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4101                                     "Frame from %pM timed out, tid %d",
4102                                     event->u.ba.sta->addr, event->u.ba.tid);
4103 }
4104
4105 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4106                                        struct ieee80211_vif *vif,
4107                                        const struct ieee80211_event *event)
4108 {
4109         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4110
4111         switch (event->type) {
4112         case MLME_EVENT:
4113                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4114                 break;
4115         case BAR_RX_EVENT:
4116                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4117                 break;
4118         case BA_FRAME_TIMEOUT:
4119                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4120                 break;
4121         default:
4122                 break;
4123         }
4124 }
4125
4126 const struct ieee80211_ops iwl_mvm_hw_ops = {
4127         .tx = iwl_mvm_mac_tx,
4128         .ampdu_action = iwl_mvm_mac_ampdu_action,
4129         .start = iwl_mvm_mac_start,
4130         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4131         .stop = iwl_mvm_mac_stop,
4132         .add_interface = iwl_mvm_mac_add_interface,
4133         .remove_interface = iwl_mvm_mac_remove_interface,
4134         .config = iwl_mvm_mac_config,
4135         .prepare_multicast = iwl_mvm_prepare_multicast,
4136         .configure_filter = iwl_mvm_configure_filter,
4137         .bss_info_changed = iwl_mvm_bss_info_changed,
4138         .hw_scan = iwl_mvm_mac_hw_scan,
4139         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4140         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4141         .sta_state = iwl_mvm_mac_sta_state,
4142         .sta_notify = iwl_mvm_mac_sta_notify,
4143         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4144         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4145         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4146         .sta_rc_update = iwl_mvm_sta_rc_update,
4147         .conf_tx = iwl_mvm_mac_conf_tx,
4148         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4149         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4150         .flush = iwl_mvm_mac_flush,
4151         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4152         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4153         .set_key = iwl_mvm_mac_set_key,
4154         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4155         .remain_on_channel = iwl_mvm_roc,
4156         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4157         .add_chanctx = iwl_mvm_add_chanctx,
4158         .remove_chanctx = iwl_mvm_remove_chanctx,
4159         .change_chanctx = iwl_mvm_change_chanctx,
4160         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4161         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4162         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4163
4164         .start_ap = iwl_mvm_start_ap_ibss,
4165         .stop_ap = iwl_mvm_stop_ap_ibss,
4166         .join_ibss = iwl_mvm_start_ap_ibss,
4167         .leave_ibss = iwl_mvm_stop_ap_ibss,
4168
4169         .set_tim = iwl_mvm_set_tim,
4170
4171         .channel_switch = iwl_mvm_channel_switch,
4172         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4173         .post_channel_switch = iwl_mvm_post_channel_switch,
4174
4175         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4176         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4177         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4178
4179         .event_callback = iwl_mvm_mac_event_callback,
4180
4181         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4182
4183 #ifdef CONFIG_PM_SLEEP
4184         /* look at d3.c */
4185         .suspend = iwl_mvm_suspend,
4186         .resume = iwl_mvm_resume,
4187         .set_wakeup = iwl_mvm_set_wakeup,
4188         .set_rekey_data = iwl_mvm_set_rekey_data,
4189 #if IS_ENABLED(CONFIG_IPV6)
4190         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4191 #endif
4192         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4193 #endif
4194         .get_survey = iwl_mvm_mac_get_survey,
4195         .sta_statistics = iwl_mvm_mac_sta_statistics,
4196 };