drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
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  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
  25  *
  26  * The full GNU General Public License is included in this distribution
  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  37  * All rights reserved.
  38  *
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  40  * modification, are permitted provided that the following conditions
  41  * are met:
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  43  *  * Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  *  * Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in
  47  *    the documentation and/or other materials provided with the
  48  *    distribution.
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  50  *    contributors may be used to endorse or promote products derived
  51  *    from this software without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  54  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  55  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  56  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  57  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  58  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  59  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  60  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  61  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  62  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  63  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  64  *
  65  *****************************************************************************/
  66 #include <linux/kernel.h>
  67 #include <linux/slab.h>
  68 #include <linux/skbuff.h>
  69 #include <linux/netdevice.h>
  70 #include <linux/etherdevice.h>
  71 #include <linux/ip.h>
  72 #include <linux/if_arp.h>
  73 #include <linux/time.h>
  74 #include <net/mac80211.h>
  75 #include <net/ieee80211_radiotap.h>
  76 #include <net/tcp.h>
  77
  78 #include "iwl-op-mode.h"
  79 #include "iwl-io.h"
  80 #include "mvm.h"
  81 #include "sta.h"
  82 #include "time-event.h"
  83 #include "iwl-eeprom-parse.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88 #include "iwl-nvm-parse.h"
  89 #include "fw-dbg.h"
  90
  91 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  92         {
  93                 .max = 1,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_AP) |
  99                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 100                         BIT(NL80211_IFTYPE_P2P_GO),
 101         },
 102         {
 103                 .max = 1,
 104                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 105         },
 106 };
 107
 108 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 109         {
 110                 .num_different_channels = 2,
 111                 .max_interfaces = 3,
 112                 .limits = iwl_mvm_limits,
 113                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 114         },
 115 };
 116
 117 #ifdef CONFIG_PM_SLEEP
 118 static const struct nl80211_wowlan_tcp_data_token_feature
 119 iwl_mvm_wowlan_tcp_token_feature = {
 120         .min_len = 0,
 121         .max_len = 255,
 122         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 123 };
 124
 125 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 126         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 127         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 128                             sizeof(struct ethhdr) -
 129                             sizeof(struct iphdr) -
 130                             sizeof(struct tcphdr),
 131         .data_interval_max = 65535, /* __le16 in API */
 132         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 133                             sizeof(struct ethhdr) -
 134                             sizeof(struct iphdr) -
 135                             sizeof(struct tcphdr),
 136         .seq = true,
 137 };
 138 #endif
 139
 140 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 141 /*
 142  * Use the reserved field to indicate magic values.
 143  * these values will only be used internally by the driver,
 144  * and won't make it to the fw (reserved will be 0).
 145  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 146  *      be the vif's ip address. in case there is not a single
 147  *      ip address (0, or more than 1), this attribute will
 148  *      be skipped.
 149  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 150  *      the LSB bytes of the vif's mac address
 151  */
 152 enum {
 153         BC_FILTER_MAGIC_NONE = 0,
 154         BC_FILTER_MAGIC_IP,
 155         BC_FILTER_MAGIC_MAC,
 156 };
 157
 158 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 159         {
 160                 /* arp */
 161                 .discard = 0,
 162                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 163                 .attrs = {
 164                         {
 165                                 /* frame type - arp, hw type - ethernet */
 166                                 .offset_type =
 167                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 168                                 .offset = sizeof(rfc1042_header),
 169                                 .val = cpu_to_be32(0x08060001),
 170                                 .mask = cpu_to_be32(0xffffffff),
 171                         },
 172                         {
 173                                 /* arp dest ip */
 174                                 .offset_type =
 175                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 176                                 .offset = sizeof(rfc1042_header) + 2 +
 177                                           sizeof(struct arphdr) +
 178                                           ETH_ALEN + sizeof(__be32) +
 179                                           ETH_ALEN,
 180                                 .mask = cpu_to_be32(0xffffffff),
 181                                 /* mark it as special field */
 182                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 183                         },
 184                 },
 185         },
 186         {
 187                 /* dhcp offer bcast */
 188                 .discard = 0,
 189                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 190                 .attrs = {
 191                         {
 192                                 /* udp dest port - 68 (bootp client)*/
 193                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 194                                 .offset = offsetof(struct udphdr, dest),
 195                                 .val = cpu_to_be32(0x00440000),
 196                                 .mask = cpu_to_be32(0xffff0000),
 197                         },
 198                         {
 199                                 /* dhcp - lsb bytes of client hw address */
 200                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 201                                 .offset = 38,
 202                                 .mask = cpu_to_be32(0xffffffff),
 203                                 /* mark it as special field */
 204                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 205                         },
 206                 },
 207         },
 208         /* last filter must be empty */
 209         {},
 210 };
 211 #endif
 212
 213 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 214 {
 215         if (!iwl_mvm_is_d0i3_supported(mvm))
 216                 return;
 217
 218         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 219         spin_lock_bh(&mvm->refs_lock);
 220         mvm->refs[ref_type]++;
 221         spin_unlock_bh(&mvm->refs_lock);
 222         iwl_trans_ref(mvm->trans);
 223 }
 224
 225 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 226 {
 227         if (!iwl_mvm_is_d0i3_supported(mvm))
 228                 return;
 229
 230         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 231         spin_lock_bh(&mvm->refs_lock);
 232         if (WARN_ON(!mvm->refs[ref_type])) {
 233                 spin_unlock_bh(&mvm->refs_lock);
 234                 return;
 235         }
 236         mvm->refs[ref_type]--;
 237         spin_unlock_bh(&mvm->refs_lock);
 238         iwl_trans_unref(mvm->trans);
 239 }
 240
 241 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 242                                      enum iwl_mvm_ref_type except_ref)
 243 {
 244         int i, j;
 245
 246         if (!iwl_mvm_is_d0i3_supported(mvm))
 247                 return;
 248
 249         spin_lock_bh(&mvm->refs_lock);
 250         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 251                 if (except_ref == i || !mvm->refs[i])
 252                         continue;
 253
 254                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 255                               i, mvm->refs[i]);
 256                 for (j = 0; j < mvm->refs[i]; j++)
 257                         iwl_trans_unref(mvm->trans);
 258                 mvm->refs[i] = 0;
 259         }
 260         spin_unlock_bh(&mvm->refs_lock);
 261 }
 262
 263 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 264 {
 265         int i;
 266         bool taken = false;
 267
 268         if (!iwl_mvm_is_d0i3_supported(mvm))
 269                 return true;
 270
 271         spin_lock_bh(&mvm->refs_lock);
 272         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 273                 if (mvm->refs[i]) {
 274                         taken = true;
 275                         break;
 276                 }
 277         }
 278         spin_unlock_bh(&mvm->refs_lock);
 279
 280         return taken;
 281 }
 282
 283 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 284 {
 285         iwl_mvm_ref(mvm, ref_type);
 286
 287         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 288                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 289                                 HZ)) {
 290                 WARN_ON_ONCE(1);
 291                 iwl_mvm_unref(mvm, ref_type);
 292                 return -EIO;
 293         }
 294
 295         return 0;
 296 }
 297
 298 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 299 {
 300         int i;
 301
 302         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 303         for (i = 0; i < NUM_PHY_CTX; i++) {
 304                 mvm->phy_ctxts[i].id = i;
 305                 mvm->phy_ctxts[i].ref = 0;
 306         }
 307 }
 308
 309 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 310                                                   const char *alpha2,
 311                                                   enum iwl_mcc_source src_id,
 312                                                   bool *changed)
 313 {
 314         struct ieee80211_regdomain *regd = NULL;
 315         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 316         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 317         struct iwl_mcc_update_resp *resp;
 318
 319         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 320
 321         lockdep_assert_held(&mvm->mutex);
 322
 323         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 324         if (IS_ERR_OR_NULL(resp)) {
 325                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 326                               PTR_ERR_OR_ZERO(resp));
 327                 goto out;
 328         }
 329
 330         if (changed)
 331                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 332
 333         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 334                                       __le32_to_cpu(resp->n_channels),
 335                                       resp->channels,
 336                                       __le16_to_cpu(resp->mcc));
 337         /* Store the return source id */
 338         src_id = resp->source_id;
 339         kfree(resp);
 340         if (IS_ERR_OR_NULL(regd)) {
 341                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 342                               PTR_ERR_OR_ZERO(regd));
 343                 goto out;
 344         }
 345
 346         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 347                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 348         mvm->lar_regdom_set = true;
 349         mvm->mcc_src = src_id;
 350
 351 out:
 352         return regd;
 353 }
 354
 355 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 356 {
 357         bool changed;
 358         struct ieee80211_regdomain *regd;
 359
 360         if (!iwl_mvm_is_lar_supported(mvm))
 361                 return;
 362
 363         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 364         if (!IS_ERR_OR_NULL(regd)) {
 365                 /* only update the regulatory core if changed */
 366                 if (changed)
 367                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 368
 369                 kfree(regd);
 370         }
 371 }
 372
 373 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 374                                                           bool *changed)
 375 {
 376         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 377                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 378                                      MCC_SOURCE_GET_CURRENT :
 379                                      MCC_SOURCE_OLD_FW, changed);
 380 }
 381
 382 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 383 {
 384         enum iwl_mcc_source used_src;
 385         struct ieee80211_regdomain *regd;
 386         int ret;
 387         bool changed;
 388         const struct ieee80211_regdomain *r =
 389                         rtnl_dereference(mvm->hw->wiphy->regd);
 390
 391         if (!r)
 392                 return -ENOENT;
 393
 394         /* save the last source in case we overwrite it below */
 395         used_src = mvm->mcc_src;
 396         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 397                 /* Notify the firmware we support wifi location updates */
 398                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 399                 if (!IS_ERR_OR_NULL(regd))
 400                         kfree(regd);
 401         }
 402
 403         /* Now set our last stored MCC and source */
 404         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 405                                      &changed);
 406         if (IS_ERR_OR_NULL(regd))
 407                 return -EIO;
 408
 409         /* update cfg80211 if the regdomain was changed */
 410         if (changed)
 411                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 412         else
 413                 ret = 0;
 414
 415         kfree(regd);
 416         return ret;
 417 }
 418
 419 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 420 {
 421         struct ieee80211_hw *hw = mvm->hw;
 422         int num_mac, ret, i;
 423         static const u32 mvm_ciphers[] = {
 424                 WLAN_CIPHER_SUITE_WEP40,
 425                 WLAN_CIPHER_SUITE_WEP104,
 426                 WLAN_CIPHER_SUITE_TKIP,
 427                 WLAN_CIPHER_SUITE_CCMP,
 428         };
 429
 430         /* Tell mac80211 our characteristics */
 431         ieee80211_hw_set(hw, SIGNAL_DBM);
 432         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 433         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 434         ieee80211_hw_set(hw, QUEUE_CONTROL);
 435         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 436         ieee80211_hw_set(hw, SUPPORTS_PS);
 437         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 438         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 439         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 440         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 441         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 442         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 443         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 444         ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 445         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
 446         if (iwl_mvm_has_new_rx_api(mvm))
 447                 ieee80211_hw_set(hw, SUPPORTS_REORDERING_BUFFER);
 448
 449         if (mvm->trans->num_rx_queues > 1)
 450                 ieee80211_hw_set(hw, USES_RSS);
 451
 452         if (mvm->trans->max_skb_frags)
 453                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 454
 455         if (!iwl_mvm_is_dqa_supported(mvm))
 456                 hw->queues = mvm->first_agg_queue;
 457         else
 458                 hw->queues = IEEE80211_MAX_QUEUES;
 459         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 460         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 461                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 462         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 463                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 464         hw->rate_control_algorithm = "iwl-mvm-rs";
 465         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 466         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 467
 468         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 4);
 469         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 470         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 471         hw->wiphy->cipher_suites = mvm->ciphers;
 472
 473         if (iwl_mvm_has_new_rx_api(mvm)) {
 474                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 475                         WLAN_CIPHER_SUITE_GCMP;
 476                 hw->wiphy->n_cipher_suites++;
 477                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 478                         WLAN_CIPHER_SUITE_GCMP_256;
 479                 hw->wiphy->n_cipher_suites++;
 480         }
 481
 482         /*
 483          * Enable 11w if advertised by firmware and software crypto
 484          * is not enabled (as the firmware will interpret some mgmt
 485          * packets, so enabling it with software crypto isn't safe)
 486          */
 487         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 488             !iwlwifi_mod_params.sw_crypto) {
 489                 ieee80211_hw_set(hw, MFP_CAPABLE);
 490                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 491                         WLAN_CIPHER_SUITE_AES_CMAC;
 492                 hw->wiphy->n_cipher_suites++;
 493         }
 494
 495         /* currently FW API supports only one optional cipher scheme */
 496         if (mvm->fw->cs[0].cipher) {
 497                 const struct iwl_fw_cipher_scheme *fwcs = &mvm->fw->cs[0];
 498                 struct ieee80211_cipher_scheme *cs = &mvm->cs[0];
 499
 500                 mvm->hw->n_cipher_schemes = 1;
 501
 502                 cs->cipher = le32_to_cpu(fwcs->cipher);
 503                 cs->iftype = BIT(NL80211_IFTYPE_STATION);
 504                 cs->hdr_len = fwcs->hdr_len;
 505                 cs->pn_len = fwcs->pn_len;
 506                 cs->pn_off = fwcs->pn_off;
 507                 cs->key_idx_off = fwcs->key_idx_off;
 508                 cs->key_idx_mask = fwcs->key_idx_mask;
 509                 cs->key_idx_shift = fwcs->key_idx_shift;
 510                 cs->mic_len = fwcs->mic_len;
 511
 512                 mvm->hw->cipher_schemes = mvm->cs;
 513                 mvm->ciphers[hw->wiphy->n_cipher_suites] = cs->cipher;
 514                 hw->wiphy->n_cipher_suites++;
 515         }
 516
 517         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 518         hw->wiphy->features |=
 519                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 520                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 521                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 522
 523         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 524         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 525         hw->chanctx_data_size = sizeof(u16);
 526
 527         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 528                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 529                 BIT(NL80211_IFTYPE_AP) |
 530                 BIT(NL80211_IFTYPE_P2P_GO) |
 531                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 532                 BIT(NL80211_IFTYPE_ADHOC);
 533
 534         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 535         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 536         if (iwl_mvm_is_lar_supported(mvm))
 537                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 538         else
 539                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 540                                                REGULATORY_DISABLE_BEACON_HINTS;
 541
 542         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 543                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 544
 545         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 546
 547         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 548         hw->wiphy->n_iface_combinations =
 549                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 550
 551         hw->wiphy->max_remain_on_channel_duration = 10000;
 552         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 553         /* we can compensate an offset of up to 3 channels = 15 MHz */
 554         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 555
 556         /* Extract MAC address */
 557         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 558         hw->wiphy->addresses = mvm->addresses;
 559         hw->wiphy->n_addresses = 1;
 560
 561         /* Extract additional MAC addresses if available */
 562         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 563                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 564
 565         for (i = 1; i < num_mac; i++) {
 566                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 567                        ETH_ALEN);
 568                 mvm->addresses[i].addr[5]++;
 569                 hw->wiphy->n_addresses++;
 570         }
 571
 572         iwl_mvm_reset_phy_ctxts(mvm);
 573
 574         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 575
 576         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 577
 578         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 579         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 580                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 581
 582         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 583                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 584         else
 585                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 586
 587         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 588                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 589                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 590         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 591                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 592                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 593
 594                 if (fw_has_capa(&mvm->fw->ucode_capa,
 595                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 596                     fw_has_api(&mvm->fw->ucode_capa,
 597                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 598                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 599                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 600         }
 601
 602         hw->wiphy->hw_version = mvm->trans->hw_id;
 603
 604         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 605                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 606         else
 607                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 608
 609         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 610         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 611         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 612         /* we create the 802.11 header and zero length SSID IE. */
 613         hw->wiphy->max_sched_scan_ie_len =
 614                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 615         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 616         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 617
 618         /*
 619          * the firmware uses u8 for num of iterations, but 0xff is saved for
 620          * infinite loop, so the maximum number of iterations is actually 254.
 621          */
 622         hw->wiphy->max_sched_scan_plan_iterations = 254;
 623
 624         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 625                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 626                                NL80211_FEATURE_P2P_GO_OPPPS |
 627                                NL80211_FEATURE_DYNAMIC_SMPS |
 628                                NL80211_FEATURE_STATIC_SMPS |
 629                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 630
 631         if (fw_has_capa(&mvm->fw->ucode_capa,
 632                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 633                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 634         if (fw_has_capa(&mvm->fw->ucode_capa,
 635                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 636                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 637
 638         if (fw_has_capa(&mvm->fw->ucode_capa,
 639                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 640                 hw->wiphy->features |=
 641                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 642
 643         if (fw_has_capa(&mvm->fw->ucode_capa,
 644                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 645                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 646
 647         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 648
 649 #ifdef CONFIG_PM_SLEEP
 650         if (iwl_mvm_is_d0i3_supported(mvm) &&
 651             device_can_wakeup(mvm->trans->dev)) {
 652                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 653                 hw->wiphy->wowlan = &mvm->wowlan;
 654         }
 655
 656         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 657             mvm->trans->ops->d3_suspend &&
 658             mvm->trans->ops->d3_resume &&
 659             device_can_wakeup(mvm->trans->dev)) {
 660                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 661                                      WIPHY_WOWLAN_DISCONNECT |
 662                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 663                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 664                                      WIPHY_WOWLAN_NET_DETECT;
 665                 if (!iwlwifi_mod_params.sw_crypto)
 666                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 667                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 668                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 669
 670                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 671                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 672                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 673                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 674                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 675                 hw->wiphy->wowlan = &mvm->wowlan;
 676         }
 677 #endif
 678
 679 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 680         /* assign default bcast filtering configuration */
 681         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 682 #endif
 683
 684         ret = iwl_mvm_leds_init(mvm);
 685         if (ret)
 686                 return ret;
 687
 688         if (fw_has_capa(&mvm->fw->ucode_capa,
 689                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 690                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 691                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 692                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 693         }
 694
 695         if (fw_has_capa(&mvm->fw->ucode_capa,
 696                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 697                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 698                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 699         }
 700
 701         hw->netdev_features |= mvm->cfg->features;
 702         if (!iwl_mvm_is_csum_supported(mvm)) {
 703                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 704                                          NETIF_F_RXCSUM);
 705                 /* We may support SW TX CSUM */
 706                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 707                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 708         }
 709
 710         ret = ieee80211_register_hw(mvm->hw);
 711         if (ret)
 712                 iwl_mvm_leds_exit(mvm);
 713
 714         return ret;
 715 }
 716
 717 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 718                              struct ieee80211_sta *sta,
 719                              struct sk_buff *skb)
 720 {
 721         struct iwl_mvm_sta *mvmsta;
 722         bool defer = false;
 723
 724         /*
 725          * double check the IN_D0I3 flag both before and after
 726          * taking the spinlock, in order to prevent taking
 727          * the spinlock when not needed.
 728          */
 729         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 730                 return false;
 731
 732         spin_lock(&mvm->d0i3_tx_lock);
 733         /*
 734          * testing the flag again ensures the skb dequeue
 735          * loop (on d0i3 exit) hasn't run yet.
 736          */
 737         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 738                 goto out;
 739
 740         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 741         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 742             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 743                 goto out;
 744
 745         __skb_queue_tail(&mvm->d0i3_tx, skb);
 746         ieee80211_stop_queues(mvm->hw);
 747
 748         /* trigger wakeup */
 749         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 750         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 751
 752         defer = true;
 753 out:
 754         spin_unlock(&mvm->d0i3_tx_lock);
 755         return defer;
 756 }
 757
 758 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 759                            struct ieee80211_tx_control *control,
 760                            struct sk_buff *skb)
 761 {
 762         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 763         struct ieee80211_sta *sta = control->sta;
 764         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 765         struct ieee80211_hdr *hdr = (void *)skb->data;
 766
 767         if (iwl_mvm_is_radio_killed(mvm)) {
 768                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 769                 goto drop;
 770         }
 771
 772         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 773             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 774             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 775                 goto drop;
 776
 777         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 778         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 779                      ieee80211_is_mgmt(hdr->frame_control) &&
 780                      !ieee80211_is_deauth(hdr->frame_control) &&
 781                      !ieee80211_is_disassoc(hdr->frame_control) &&
 782                      !ieee80211_is_action(hdr->frame_control)))
 783                 sta = NULL;
 784
 785         if (sta) {
 786                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 787                         return;
 788                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 789                         goto drop;
 790                 return;
 791         }
 792
 793         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 794                 goto drop;
 795         return;
 796  drop:
 797         ieee80211_free_txskb(hw, skb);
 798 }
 799
 800 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 801 {
 802         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 803                 return false;
 804         return true;
 805 }
 806
 807 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 808 {
 809         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 810                 return false;
 811         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 812                 return true;
 813
 814         /* enabled by default */
 815         return true;
 816 }
 817
 818 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 819         do {                                                    \
 820                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 821                         break;                                  \
 822                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 823         } while (0)
 824
 825 static void
 826 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 827                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 828                             enum ieee80211_ampdu_mlme_action action)
 829 {
 830         struct iwl_fw_dbg_trigger_tlv *trig;
 831         struct iwl_fw_dbg_trigger_ba *ba_trig;
 832
 833         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 834                 return;
 835
 836         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 837         ba_trig = (void *)trig->data;
 838
 839         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 840                 return;
 841
 842         switch (action) {
 843         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 844                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 845                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 846
 847                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 848                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 849                                  sta->addr, tid, tid_data->ssn);
 850                 break;
 851                 }
 852         case IEEE80211_AMPDU_TX_STOP_CONT:
 853                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 854                                  "TX AGG STOP: MAC %pM tid %d\n",
 855                                  sta->addr, tid);
 856                 break;
 857         case IEEE80211_AMPDU_RX_START:
 858                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 859                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 860                                  sta->addr, tid, rx_ba_ssn);
 861                 break;
 862         case IEEE80211_AMPDU_RX_STOP:
 863                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 864                                  "RX AGG STOP: MAC %pM tid %d\n",
 865                                  sta->addr, tid);
 866                 break;
 867         default:
 868                 break;
 869         }
 870 }
 871
 872 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 873                                     struct ieee80211_vif *vif,
 874                                     struct ieee80211_ampdu_params *params)
 875 {
 876         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 877         int ret;
 878         bool tx_agg_ref = false;
 879         struct ieee80211_sta *sta = params->sta;
 880         enum ieee80211_ampdu_mlme_action action = params->action;
 881         u16 tid = params->tid;
 882         u16 *ssn = &params->ssn;
 883         u8 buf_size = params->buf_size;
 884         bool amsdu = params->amsdu;
 885         u16 timeout = params->timeout;
 886
 887         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 888                      sta->addr, tid, action);
 889
 890         if (!(mvm->nvm_data->sku_cap_11n_enable))
 891                 return -EACCES;
 892
 893         /* return from D0i3 before starting a new Tx aggregation */
 894         switch (action) {
 895         case IEEE80211_AMPDU_TX_START:
 896         case IEEE80211_AMPDU_TX_STOP_CONT:
 897         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 898         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 899         case IEEE80211_AMPDU_TX_OPERATIONAL:
 900                 /*
 901                  * for tx start, wait synchronously until D0i3 exit to
 902                  * get the correct sequence number for the tid.
 903                  * additionally, some other ampdu actions use direct
 904                  * target access, which is not handled automatically
 905                  * by the trans layer (unlike commands), so wait for
 906                  * d0i3 exit in these cases as well.
 907                  */
 908                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 909                 if (ret)
 910                         return ret;
 911
 912                 tx_agg_ref = true;
 913                 break;
 914         default:
 915                 break;
 916         }
 917
 918         mutex_lock(&mvm->mutex);
 919
 920         switch (action) {
 921         case IEEE80211_AMPDU_RX_START:
 922                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 923                         ret = -EINVAL;
 924                         break;
 925                 }
 926                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 927                                          timeout);
 928                 break;
 929         case IEEE80211_AMPDU_RX_STOP:
 930                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 931                                          timeout);
 932                 break;
 933         case IEEE80211_AMPDU_TX_START:
 934                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 935                         ret = -EINVAL;
 936                         break;
 937                 }
 938                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 939                 break;
 940         case IEEE80211_AMPDU_TX_STOP_CONT:
 941                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 942                 break;
 943         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 944         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 945                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 946                 break;
 947         case IEEE80211_AMPDU_TX_OPERATIONAL:
 948                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 949                                               buf_size, amsdu);
 950                 break;
 951         default:
 952                 WARN_ON_ONCE(1);
 953                 ret = -EINVAL;
 954                 break;
 955         }
 956
 957         if (!ret) {
 958                 u16 rx_ba_ssn = 0;
 959
 960                 if (action == IEEE80211_AMPDU_RX_START)
 961                         rx_ba_ssn = *ssn;
 962
 963                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 964                                             rx_ba_ssn, action);
 965         }
 966         mutex_unlock(&mvm->mutex);
 967
 968         /*
 969          * If the tid is marked as started, we won't use it for offloaded
 970          * traffic on the next D0i3 entry. It's safe to unref.
 971          */
 972         if (tx_agg_ref)
 973                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 974
 975         return ret;
 976 }
 977
 978 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 979                                      struct ieee80211_vif *vif)
 980 {
 981         struct iwl_mvm *mvm = data;
 982         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 983
 984         mvmvif->uploaded = false;
 985         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 986
 987         spin_lock_bh(&mvm->time_event_lock);
 988         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 989         spin_unlock_bh(&mvm->time_event_lock);
 990
 991         mvmvif->phy_ctxt = NULL;
 992         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 993 }
 994
 995 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 996 {
 997         /* clear the D3 reconfig, we only need it to avoid dumping a
 998          * firmware coredump on reconfiguration, we shouldn't do that
 999          * on D3->D0 transition
1000          */
1001         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1002                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1003                 iwl_mvm_fw_error_dump(mvm);
1004         }
1005
1006         /* cleanup all stale references (scan, roc), but keep the
1007          * ucode_down ref until reconfig is complete
1008          */
1009         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1010
1011         iwl_mvm_stop_device(mvm);
1012
1013         mvm->scan_status = 0;
1014         mvm->ps_disabled = false;
1015         mvm->calibrating = false;
1016
1017         /* just in case one was running */
1018         iwl_mvm_cleanup_roc_te(mvm);
1019         ieee80211_remain_on_channel_expired(mvm->hw);
1020
1021         /*
1022          * cleanup all interfaces, even inactive ones, as some might have
1023          * gone down during the HW restart
1024          */
1025         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1026
1027         mvm->p2p_device_vif = NULL;
1028         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1029
1030         iwl_mvm_reset_phy_ctxts(mvm);
1031         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1032         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1033         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1034         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1035         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1036         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1037
1038         ieee80211_wake_queues(mvm->hw);
1039
1040         /* clear any stale d0i3 state */
1041         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1042
1043         mvm->vif_count = 0;
1044         mvm->rx_ba_sessions = 0;
1045         mvm->fw_dbg_conf = FW_DBG_INVALID;
1046
1047         /* keep statistics ticking */
1048         iwl_mvm_accu_radio_stats(mvm);
1049 }
1050
1051 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1052 {
1053         int ret;
1054
1055         lockdep_assert_held(&mvm->mutex);
1056
1057         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1058                 /* Clean up some internal and mac80211 state on restart */
1059                 iwl_mvm_restart_cleanup(mvm);
1060         } else {
1061                 /* Hold the reference to prevent runtime suspend while
1062                  * the start procedure runs.  It's a bit confusing
1063                  * that the UCODE_DOWN reference is taken, but it just
1064                  * means "UCODE is not UP yet". ( TODO: rename this
1065                  * reference).
1066                  */
1067                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1068         }
1069         ret = iwl_mvm_up(mvm);
1070
1071         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1072                 /* Something went wrong - we need to finish some cleanup
1073                  * that normally iwl_mvm_mac_restart_complete() below
1074                  * would do.
1075                  */
1076                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1077                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1078         }
1079
1080         return ret;
1081 }
1082
1083 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1084 {
1085         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1086         int ret;
1087
1088         /* Some hw restart cleanups must not hold the mutex */
1089         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1090                 /*
1091                  * Make sure we are out of d0i3. This is needed
1092                  * to make sure the reference accounting is correct
1093                  * (and there is no stale d0i3_exit_work).
1094                  */
1095                 wait_event_timeout(mvm->d0i3_exit_waitq,
1096                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1097                                              &mvm->status),
1098                                    HZ);
1099         }
1100
1101         mutex_lock(&mvm->mutex);
1102         ret = __iwl_mvm_mac_start(mvm);
1103         mutex_unlock(&mvm->mutex);
1104
1105         return ret;
1106 }
1107
1108 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1109 {
1110         int ret;
1111
1112         mutex_lock(&mvm->mutex);
1113
1114         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1115         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1116         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1117         if (ret)
1118                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1119                         ret);
1120
1121         /* allow transport/FW low power modes */
1122         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1123
1124         /*
1125          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1126          * of packets the FW sent out, so we must reconnect.
1127          */
1128         iwl_mvm_teardown_tdls_peers(mvm);
1129
1130         mutex_unlock(&mvm->mutex);
1131 }
1132
1133 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1134 {
1135         if (iwl_mvm_is_d0i3_supported(mvm) &&
1136             iwl_mvm_enter_d0i3_on_suspend(mvm))
1137                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1138                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1139                                                         &mvm->status),
1140                                               HZ),
1141                           "D0i3 exit on resume timed out\n");
1142 }
1143
1144 static void
1145 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1146                               enum ieee80211_reconfig_type reconfig_type)
1147 {
1148         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1149
1150         switch (reconfig_type) {
1151         case IEEE80211_RECONFIG_TYPE_RESTART:
1152                 iwl_mvm_restart_complete(mvm);
1153                 break;
1154         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1155                 iwl_mvm_resume_complete(mvm);
1156                 break;
1157         }
1158 }
1159
1160 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1161 {
1162         lockdep_assert_held(&mvm->mutex);
1163
1164         /* firmware counters are obviously reset now, but we shouldn't
1165          * partially track so also clear the fw_reset_accu counters.
1166          */
1167         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1168
1169         /* async_handlers_wk is now blocked */
1170
1171         /*
1172          * The work item could be running or queued if the
1173          * ROC time event stops just as we get here.
1174          */
1175         flush_work(&mvm->roc_done_wk);
1176
1177         iwl_mvm_stop_device(mvm);
1178
1179         iwl_mvm_async_handlers_purge(mvm);
1180         /* async_handlers_list is empty and will stay empty: HW is stopped */
1181
1182         /* the fw is stopped, the aux sta is dead: clean up driver state */
1183         iwl_mvm_del_aux_sta(mvm);
1184
1185         iwl_free_fw_paging(mvm);
1186
1187         /*
1188          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1189          * won't be called in this case).
1190          * But make sure to cleanup interfaces that have gone down before/during
1191          * HW restart was requested.
1192          */
1193         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1194                 ieee80211_iterate_interfaces(mvm->hw, 0,
1195                                              iwl_mvm_cleanup_iterator, mvm);
1196
1197         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1198          * make sure there's nothing left there and warn if any is found.
1199          */
1200         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1201                 int i;
1202
1203                 for (i = 0; i < mvm->max_scans; i++) {
1204                         if (WARN_ONCE(mvm->scan_uid_status[i],
1205                                       "UMAC scan UID %d status was not cleaned\n",
1206                                       i))
1207                                 mvm->scan_uid_status[i] = 0;
1208                 }
1209         }
1210 }
1211
1212 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1213 {
1214         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1215
1216         flush_work(&mvm->d0i3_exit_work);
1217         flush_work(&mvm->async_handlers_wk);
1218         flush_work(&mvm->add_stream_wk);
1219         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1220         cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork);
1221         cancel_delayed_work_sync(&mvm->scan_timeout_dwork);
1222         iwl_mvm_free_fw_dump_desc(mvm);
1223
1224         mutex_lock(&mvm->mutex);
1225         __iwl_mvm_mac_stop(mvm);
1226         mutex_unlock(&mvm->mutex);
1227
1228         /*
1229          * The worker might have been waiting for the mutex, let it run and
1230          * discover that its list is now empty.
1231          */
1232         cancel_work_sync(&mvm->async_handlers_wk);
1233 }
1234
1235 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1236 {
1237         u16 i;
1238
1239         lockdep_assert_held(&mvm->mutex);
1240
1241         for (i = 0; i < NUM_PHY_CTX; i++)
1242                 if (!mvm->phy_ctxts[i].ref)
1243                         return &mvm->phy_ctxts[i];
1244
1245         IWL_ERR(mvm, "No available PHY context\n");
1246         return NULL;
1247 }
1248
1249 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1250                                 s16 tx_power)
1251 {
1252         struct iwl_dev_tx_power_cmd cmd = {
1253                 .v3.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1254                 .v3.v2.mac_context_id =
1255                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1256                 .v3.v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1257         };
1258         int len = sizeof(cmd);
1259
1260         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1261                 cmd.v3.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1262
1263         if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK))
1264                 len = sizeof(cmd.v3);
1265         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1266                 len = sizeof(cmd.v3.v2);
1267
1268         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1269 }
1270
1271 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1272                                      struct ieee80211_vif *vif)
1273 {
1274         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1275         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1276         int ret;
1277
1278         mvmvif->mvm = mvm;
1279
1280         /*
1281          * make sure D0i3 exit is completed, otherwise a target access
1282          * during tx queue configuration could be done when still in
1283          * D0i3 state.
1284          */
1285         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1286         if (ret)
1287                 return ret;
1288
1289         /*
1290          * Not much to do here. The stack will not allow interface
1291          * types or combinations that we didn't advertise, so we
1292          * don't really have to check the types.
1293          */
1294
1295         mutex_lock(&mvm->mutex);
1296
1297         /* make sure that beacon statistics don't go backwards with FW reset */
1298         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1299                 mvmvif->beacon_stats.accu_num_beacons +=
1300                         mvmvif->beacon_stats.num_beacons;
1301
1302         /* Allocate resources for the MAC context, and add it to the fw  */
1303         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1304         if (ret)
1305                 goto out_unlock;
1306
1307         /* Counting number of interfaces is needed for legacy PM */
1308         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1309                 mvm->vif_count++;
1310
1311         /*
1312          * The AP binding flow can be done only after the beacon
1313          * template is configured (which happens only in the mac80211
1314          * start_ap() flow), and adding the broadcast station can happen
1315          * only after the binding.
1316          * In addition, since modifying the MAC before adding a bcast
1317          * station is not allowed by the FW, delay the adding of MAC context to
1318          * the point where we can also add the bcast station.
1319          * In short: there's not much we can do at this point, other than
1320          * allocating resources :)
1321          */
1322         if (vif->type == NL80211_IFTYPE_AP ||
1323             vif->type == NL80211_IFTYPE_ADHOC) {
1324                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1325                 if (ret) {
1326                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1327                         goto out_release;
1328                 }
1329
1330                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1331                 goto out_unlock;
1332         }
1333
1334         mvmvif->features |= hw->netdev_features;
1335
1336         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1337         if (ret)
1338                 goto out_release;
1339
1340         ret = iwl_mvm_power_update_mac(mvm);
1341         if (ret)
1342                 goto out_remove_mac;
1343
1344         /* beacon filtering */
1345         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1346         if (ret)
1347                 goto out_remove_mac;
1348
1349         if (!mvm->bf_allowed_vif &&
1350             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1351                 mvm->bf_allowed_vif = mvmvif;
1352                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1353                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1354         }
1355
1356         /*
1357          * P2P_DEVICE interface does not have a channel context assigned to it,
1358          * so a dedicated PHY context is allocated to it and the corresponding
1359          * MAC context is bound to it at this stage.
1360          */
1361         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1362
1363                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1364                 if (!mvmvif->phy_ctxt) {
1365                         ret = -ENOSPC;
1366                         goto out_free_bf;
1367                 }
1368
1369                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1370                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1371                 if (ret)
1372                         goto out_unref_phy;
1373
1374                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1375                 if (ret)
1376                         goto out_unbind;
1377
1378                 /* Save a pointer to p2p device vif, so it can later be used to
1379                  * update the p2p device MAC when a GO is started/stopped */
1380                 mvm->p2p_device_vif = vif;
1381         }
1382
1383         iwl_mvm_vif_dbgfs_register(mvm, vif);
1384         goto out_unlock;
1385
1386  out_unbind:
1387         iwl_mvm_binding_remove_vif(mvm, vif);
1388  out_unref_phy:
1389         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1390  out_free_bf:
1391         if (mvm->bf_allowed_vif == mvmvif) {
1392                 mvm->bf_allowed_vif = NULL;
1393                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1394                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1395         }
1396  out_remove_mac:
1397         mvmvif->phy_ctxt = NULL;
1398         iwl_mvm_mac_ctxt_remove(mvm, vif);
1399  out_release:
1400         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1401                 mvm->vif_count--;
1402
1403         iwl_mvm_mac_ctxt_release(mvm, vif);
1404  out_unlock:
1405         mutex_unlock(&mvm->mutex);
1406
1407         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1408
1409         return ret;
1410 }
1411
1412 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1413                                         struct ieee80211_vif *vif)
1414 {
1415         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1416
1417         if (tfd_msk) {
1418                 /*
1419                  * mac80211 first removes all the stations of the vif and
1420                  * then removes the vif. When it removes a station it also
1421                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1422                  * of all the stations of this vif are closed, and the queues
1423                  * of these AMPDU sessions are properly closed.
1424                  * We still need to take care of the shared queues of the vif.
1425                  * Flush them here.
1426                  */
1427                 mutex_lock(&mvm->mutex);
1428                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1429                 mutex_unlock(&mvm->mutex);
1430
1431                 /*
1432                  * There are transports that buffer a few frames in the host.
1433                  * For these, the flush above isn't enough since while we were
1434                  * flushing, the transport might have sent more frames to the
1435                  * device. To solve this, wait here until the transport is
1436                  * empty. Technically, this could have replaced the flush
1437                  * above, but flush is much faster than draining. So flush
1438                  * first, and drain to make sure we have no frames in the
1439                  * transport anymore.
1440                  * If a station still had frames on the shared queues, it is
1441                  * already marked as draining, so to complete the draining, we
1442                  * just need to wait until the transport is empty.
1443                  */
1444                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1445         }
1446
1447         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1448                 /*
1449                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1450                  * We assume here that all the packets sent to the OFFCHANNEL
1451                  * queue are sent in ROC session.
1452                  */
1453                 flush_work(&mvm->roc_done_wk);
1454         } else {
1455                 /*
1456                  * By now, all the AC queues are empty. The AGG queues are
1457                  * empty too. We already got all the Tx responses for all the
1458                  * packets in the queues. The drain work can have been
1459                  * triggered. Flush it.
1460                  */
1461                 flush_work(&mvm->sta_drained_wk);
1462         }
1463 }
1464
1465 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1466                                          struct ieee80211_vif *vif)
1467 {
1468         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1469         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1470
1471         iwl_mvm_prepare_mac_removal(mvm, vif);
1472
1473         mutex_lock(&mvm->mutex);
1474
1475         if (mvm->bf_allowed_vif == mvmvif) {
1476                 mvm->bf_allowed_vif = NULL;
1477                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1478                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1479         }
1480
1481         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1482
1483         /*
1484          * For AP/GO interface, the tear down of the resources allocated to the
1485          * interface is be handled as part of the stop_ap flow.
1486          */
1487         if (vif->type == NL80211_IFTYPE_AP ||
1488             vif->type == NL80211_IFTYPE_ADHOC) {
1489 #ifdef CONFIG_NL80211_TESTMODE
1490                 if (vif == mvm->noa_vif) {
1491                         mvm->noa_vif = NULL;
1492                         mvm->noa_duration = 0;
1493                 }
1494 #endif
1495                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1496                 goto out_release;
1497         }
1498
1499         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1500                 mvm->p2p_device_vif = NULL;
1501                 iwl_mvm_rm_bcast_sta(mvm, vif);
1502                 iwl_mvm_binding_remove_vif(mvm, vif);
1503                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1504                 mvmvif->phy_ctxt = NULL;
1505         }
1506
1507         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1508                 mvm->vif_count--;
1509
1510         iwl_mvm_power_update_mac(mvm);
1511         iwl_mvm_mac_ctxt_remove(mvm, vif);
1512
1513 out_release:
1514         iwl_mvm_mac_ctxt_release(mvm, vif);
1515         mutex_unlock(&mvm->mutex);
1516 }
1517
1518 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1519 {
1520         return 0;
1521 }
1522
1523 struct iwl_mvm_mc_iter_data {
1524         struct iwl_mvm *mvm;
1525         int port_id;
1526 };
1527
1528 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1529                                       struct ieee80211_vif *vif)
1530 {
1531         struct iwl_mvm_mc_iter_data *data = _data;
1532         struct iwl_mvm *mvm = data->mvm;
1533         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1534         int ret, len;
1535
1536         /* if we don't have free ports, mcast frames will be dropped */
1537         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1538                 return;
1539
1540         if (vif->type != NL80211_IFTYPE_STATION ||
1541             !vif->bss_conf.assoc)
1542                 return;
1543
1544         cmd->port_id = data->port_id++;
1545         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1546         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1547
1548         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1549         if (ret)
1550                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1551 }
1552
1553 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1554 {
1555         struct iwl_mvm_mc_iter_data iter_data = {
1556                 .mvm = mvm,
1557         };
1558
1559         lockdep_assert_held(&mvm->mutex);
1560
1561         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1562                 return;
1563
1564         ieee80211_iterate_active_interfaces_atomic(
1565                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1566                 iwl_mvm_mc_iface_iterator, &iter_data);
1567 }
1568
1569 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1570                                      struct netdev_hw_addr_list *mc_list)
1571 {
1572         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1573         struct iwl_mcast_filter_cmd *cmd;
1574         struct netdev_hw_addr *addr;
1575         int addr_count;
1576         bool pass_all;
1577         int len;
1578
1579         addr_count = netdev_hw_addr_list_count(mc_list);
1580         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1581                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1582         if (pass_all)
1583                 addr_count = 0;
1584
1585         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1586         cmd = kzalloc(len, GFP_ATOMIC);
1587         if (!cmd)
1588                 return 0;
1589
1590         if (pass_all) {
1591                 cmd->pass_all = 1;
1592                 return (u64)(unsigned long)cmd;
1593         }
1594
1595         netdev_hw_addr_list_for_each(addr, mc_list) {
1596                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1597                                    cmd->count, addr->addr);
1598                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1599                        addr->addr, ETH_ALEN);
1600                 cmd->count++;
1601         }
1602
1603         return (u64)(unsigned long)cmd;
1604 }
1605
1606 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1607                                      unsigned int changed_flags,
1608                                      unsigned int *total_flags,
1609                                      u64 multicast)
1610 {
1611         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1612         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1613
1614         mutex_lock(&mvm->mutex);
1615
1616         /* replace previous configuration */
1617         kfree(mvm->mcast_filter_cmd);
1618         mvm->mcast_filter_cmd = cmd;
1619
1620         if (!cmd)
1621                 goto out;
1622
1623         iwl_mvm_recalc_multicast(mvm);
1624 out:
1625         mutex_unlock(&mvm->mutex);
1626         *total_flags = 0;
1627 }
1628
1629 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1630                                         struct ieee80211_vif *vif,
1631                                         unsigned int filter_flags,
1632                                         unsigned int changed_flags)
1633 {
1634         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1635
1636         /* We support only filter for probe requests */
1637         if (!(changed_flags & FIF_PROBE_REQ))
1638                 return;
1639
1640         /* Supported only for p2p client interfaces */
1641         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1642             !vif->p2p)
1643                 return;
1644
1645         mutex_lock(&mvm->mutex);
1646         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1647         mutex_unlock(&mvm->mutex);
1648 }
1649
1650 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1651 struct iwl_bcast_iter_data {
1652         struct iwl_mvm *mvm;
1653         struct iwl_bcast_filter_cmd *cmd;
1654         u8 current_filter;
1655 };
1656
1657 static void
1658 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1659                          const struct iwl_fw_bcast_filter *in_filter,
1660                          struct iwl_fw_bcast_filter *out_filter)
1661 {
1662         struct iwl_fw_bcast_filter_attr *attr;
1663         int i;
1664
1665         memcpy(out_filter, in_filter, sizeof(*out_filter));
1666
1667         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1668                 attr = &out_filter->attrs[i];
1669
1670                 if (!attr->mask)
1671                         break;
1672
1673                 switch (attr->reserved1) {
1674                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1675                         if (vif->bss_conf.arp_addr_cnt != 1) {
1676                                 attr->mask = 0;
1677                                 continue;
1678                         }
1679
1680                         attr->val = vif->bss_conf.arp_addr_list[0];
1681                         break;
1682                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1683                         attr->val = *(__be32 *)&vif->addr[2];
1684                         break;
1685                 default:
1686                         break;
1687                 }
1688                 attr->reserved1 = 0;
1689                 out_filter->num_attrs++;
1690         }
1691 }
1692
1693 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1694                                           struct ieee80211_vif *vif)
1695 {
1696         struct iwl_bcast_iter_data *data = _data;
1697         struct iwl_mvm *mvm = data->mvm;
1698         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1699         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1700         struct iwl_fw_bcast_mac *bcast_mac;
1701         int i;
1702
1703         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1704                 return;
1705
1706         bcast_mac = &cmd->macs[mvmvif->id];
1707
1708         /*
1709          * enable filtering only for associated stations, but not for P2P
1710          * Clients
1711          */
1712         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1713             !vif->bss_conf.assoc)
1714                 return;
1715
1716         bcast_mac->default_discard = 1;
1717
1718         /* copy all configured filters */
1719         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1720                 /*
1721                  * Make sure we don't exceed our filters limit.
1722                  * if there is still a valid filter to be configured,
1723                  * be on the safe side and just allow bcast for this mac.
1724                  */
1725                 if (WARN_ON_ONCE(data->current_filter >=
1726                                  ARRAY_SIZE(cmd->filters))) {
1727                         bcast_mac->default_discard = 0;
1728                         bcast_mac->attached_filters = 0;
1729                         break;
1730                 }
1731
1732                 iwl_mvm_set_bcast_filter(vif,
1733                                          &mvm->bcast_filters[i],
1734                                          &cmd->filters[data->current_filter]);
1735
1736                 /* skip current filter if it contains no attributes */
1737                 if (!cmd->filters[data->current_filter].num_attrs)
1738                         continue;
1739
1740                 /* attach the filter to current mac */
1741                 bcast_mac->attached_filters |=
1742                                 cpu_to_le16(BIT(data->current_filter));
1743
1744                 data->current_filter++;
1745         }
1746 }
1747
1748 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1749                                     struct iwl_bcast_filter_cmd *cmd)
1750 {
1751         struct iwl_bcast_iter_data iter_data = {
1752                 .mvm = mvm,
1753                 .cmd = cmd,
1754         };
1755
1756         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1757                 return false;
1758
1759         memset(cmd, 0, sizeof(*cmd));
1760         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1761         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1762
1763 #ifdef CONFIG_IWLWIFI_DEBUGFS
1764         /* use debugfs filters/macs if override is configured */
1765         if (mvm->dbgfs_bcast_filtering.override) {
1766                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1767                        sizeof(cmd->filters));
1768                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1769                        sizeof(cmd->macs));
1770                 return true;
1771         }
1772 #endif
1773
1774         /* if no filters are configured, do nothing */
1775         if (!mvm->bcast_filters)
1776                 return false;
1777
1778         /* configure and attach these filters for each associated sta vif */
1779         ieee80211_iterate_active_interfaces(
1780                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1781                 iwl_mvm_bcast_filter_iterator, &iter_data);
1782
1783         return true;
1784 }
1785
1786 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1787 {
1788         struct iwl_bcast_filter_cmd cmd;
1789
1790         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1791                 return 0;
1792
1793         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1794                 return 0;
1795
1796         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1797                                     sizeof(cmd), &cmd);
1798 }
1799 #else
1800 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1801 {
1802         return 0;
1803 }
1804 #endif
1805
1806 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1807                                     struct ieee80211_vif *vif)
1808 {
1809         struct iwl_mu_group_mgmt_cmd cmd = {};
1810
1811         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1812                WLAN_MEMBERSHIP_LEN);
1813         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1814                WLAN_USER_POSITION_LEN);
1815
1816         return iwl_mvm_send_cmd_pdu(mvm,
1817                                     WIDE_ID(DATA_PATH_GROUP,
1818                                             UPDATE_MU_GROUPS_CMD),
1819                                     0, sizeof(cmd), &cmd);
1820 }
1821
1822 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1823                                            struct ieee80211_vif *vif)
1824 {
1825         if (vif->mu_mimo_owner) {
1826                 struct iwl_mu_group_mgmt_notif *notif = _data;
1827
1828                 /*
1829                  * MU-MIMO Group Id action frame is little endian. We treat
1830                  * the data received from firmware as if it came from the
1831                  * action frame, so no conversion is needed.
1832                  */
1833                 ieee80211_update_mu_groups(vif,
1834                                            (u8 *)&notif->membership_status,
1835                                            (u8 *)&notif->user_position);
1836         }
1837 }
1838
1839 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1840                                struct iwl_rx_cmd_buffer *rxb)
1841 {
1842         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1843         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1844
1845         ieee80211_iterate_active_interfaces_atomic(
1846                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1847                         iwl_mvm_mu_mimo_iface_iterator, notif);
1848 }
1849
1850 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1851                                              struct ieee80211_vif *vif,
1852                                              struct ieee80211_bss_conf *bss_conf,
1853                                              u32 changes)
1854 {
1855         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1856         int ret;
1857
1858         /*
1859          * Re-calculate the tsf id, as the master-slave relations depend on the
1860          * beacon interval, which was not known when the station interface was
1861          * added.
1862          */
1863         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1864                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1865
1866         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1867             mvmvif->lqm_active)
1868                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1869                                      0, 0);
1870
1871         /*
1872          * If we're not associated yet, take the (new) BSSID before associating
1873          * so the firmware knows. If we're already associated, then use the old
1874          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1875          * branch for disassociation below.
1876          */
1877         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1878                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1879
1880         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1881         if (ret)
1882                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1883
1884         /* after sending it once, adopt mac80211 data */
1885         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1886         mvmvif->associated = bss_conf->assoc;
1887
1888         if (changes & BSS_CHANGED_ASSOC) {
1889                 if (bss_conf->assoc) {
1890                         /* clear statistics to get clean beacon counter */
1891                         iwl_mvm_request_statistics(mvm, true);
1892                         memset(&mvmvif->beacon_stats, 0,
1893                                sizeof(mvmvif->beacon_stats));
1894
1895                         /* add quota for this interface */
1896                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1897                         if (ret) {
1898                                 IWL_ERR(mvm, "failed to update quotas\n");
1899                                 return;
1900                         }
1901
1902                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1903                                      &mvm->status)) {
1904                                 /*
1905                                  * If we're restarting then the firmware will
1906                                  * obviously have lost synchronisation with
1907                                  * the AP. It will attempt to synchronise by
1908                                  * itself, but we can make it more reliable by
1909                                  * scheduling a session protection time event.
1910                                  *
1911                                  * The firmware needs to receive a beacon to
1912                                  * catch up with synchronisation, use 110% of
1913                                  * the beacon interval.
1914                                  *
1915                                  * Set a large maximum delay to allow for more
1916                                  * than a single interface.
1917                                  */
1918                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1919                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1920                                                         5 * dur, false);
1921                         }
1922
1923                         iwl_mvm_sf_update(mvm, vif, false);
1924                         iwl_mvm_power_vif_assoc(mvm, vif);
1925                         if (vif->p2p) {
1926                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1927                                 iwl_mvm_update_smps(mvm, vif,
1928                                                     IWL_MVM_SMPS_REQ_PROT,
1929                                                     IEEE80211_SMPS_DYNAMIC);
1930                         }
1931                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1932                         /*
1933                          * If update fails - SF might be running in associated
1934                          * mode while disassociated - which is forbidden.
1935                          */
1936                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1937                                   "Failed to update SF upon disassociation\n");
1938
1939                         /* remove AP station now that the MAC is unassoc */
1940                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1941                         if (ret)
1942                                 IWL_ERR(mvm, "failed to remove AP station\n");
1943
1944                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1945                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1946                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1947                         /* remove quota for this interface */
1948                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1949                         if (ret)
1950                                 IWL_ERR(mvm, "failed to update quotas\n");
1951
1952                         if (vif->p2p)
1953                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1954
1955                         /* this will take the cleared BSSID from bss_conf */
1956                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1957                         if (ret)
1958                                 IWL_ERR(mvm,
1959                                         "failed to update MAC %pM (clear after unassoc)\n",
1960                                         vif->addr);
1961                 }
1962
1963                 /*
1964                  * The firmware tracks the MU-MIMO group on its own.
1965                  * However, on HW restart we should restore this data.
1966                  */
1967                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1968                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1969                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1970                         if (ret)
1971                                 IWL_ERR(mvm,
1972                                         "failed to update VHT MU_MIMO groups\n");
1973                 }
1974
1975                 iwl_mvm_recalc_multicast(mvm);
1976                 iwl_mvm_configure_bcast_filter(mvm);
1977
1978                 /* reset rssi values */
1979                 mvmvif->bf_data.ave_beacon_signal = 0;
1980
1981                 iwl_mvm_bt_coex_vif_change(mvm);
1982                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1983                                     IEEE80211_SMPS_AUTOMATIC);
1984                 if (fw_has_capa(&mvm->fw->ucode_capa,
1985                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1986                         iwl_mvm_config_scan(mvm);
1987         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1988                 /*
1989                  * We received a beacon _after_ association so
1990                  * remove the session protection.
1991                  */
1992                 iwl_mvm_remove_time_event(mvm, mvmvif,
1993                                           &mvmvif->time_event_data);
1994         }
1995
1996         if (changes & BSS_CHANGED_BEACON_INFO) {
1997                 iwl_mvm_sf_update(mvm, vif, false);
1998                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1999         }
2000
2001         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
2002                        /*
2003                         * Send power command on every beacon change,
2004                         * because we may have not enabled beacon abort yet.
2005                         */
2006                        BSS_CHANGED_BEACON_INFO)) {
2007                 ret = iwl_mvm_power_update_mac(mvm);
2008                 if (ret)
2009                         IWL_ERR(mvm, "failed to update power mode\n");
2010         }
2011
2012         if (changes & BSS_CHANGED_TXPOWER) {
2013                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2014                                 bss_conf->txpower);
2015                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2016         }
2017
2018         if (changes & BSS_CHANGED_CQM) {
2019                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2020                 /* reset cqm events tracking */
2021                 mvmvif->bf_data.last_cqm_event = 0;
2022                 if (mvmvif->bf_data.bf_enabled) {
2023                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2024                         if (ret)
2025                                 IWL_ERR(mvm,
2026                                         "failed to update CQM thresholds\n");
2027                 }
2028         }
2029
2030         if (changes & BSS_CHANGED_ARP_FILTER) {
2031                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2032                 iwl_mvm_configure_bcast_filter(mvm);
2033         }
2034 }
2035
2036 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2037                                  struct ieee80211_vif *vif)
2038 {
2039         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2040         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2041         int ret;
2042
2043         /*
2044          * iwl_mvm_mac_ctxt_add() might read directly from the device
2045          * (the system time), so make sure it is available.
2046          */
2047         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2048         if (ret)
2049                 return ret;
2050
2051         mutex_lock(&mvm->mutex);
2052
2053         /* Send the beacon template */
2054         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2055         if (ret)
2056                 goto out_unlock;
2057
2058         /*
2059          * Re-calculate the tsf id, as the master-slave relations depend on the
2060          * beacon interval, which was not known when the AP interface was added.
2061          */
2062         if (vif->type == NL80211_IFTYPE_AP)
2063                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2064
2065         mvmvif->ap_assoc_sta_count = 0;
2066
2067         /* Add the mac context */
2068         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2069         if (ret)
2070                 goto out_unlock;
2071
2072         /* Perform the binding */
2073         ret = iwl_mvm_binding_add_vif(mvm, vif);
2074         if (ret)
2075                 goto out_remove;
2076
2077         /* Send the bcast station. At this stage the TBTT and DTIM time events
2078          * are added and applied to the scheduler */
2079         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2080         if (ret)
2081                 goto out_unbind;
2082
2083         /* must be set before quota calculations */
2084         mvmvif->ap_ibss_active = true;
2085
2086         /* power updated needs to be done before quotas */
2087         iwl_mvm_power_update_mac(mvm);
2088
2089         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2090         if (ret)
2091                 goto out_quota_failed;
2092
2093         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2094         if (vif->p2p && mvm->p2p_device_vif)
2095                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2096
2097         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2098
2099         iwl_mvm_bt_coex_vif_change(mvm);
2100
2101         /* we don't support TDLS during DCM */
2102         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2103                 iwl_mvm_teardown_tdls_peers(mvm);
2104
2105         goto out_unlock;
2106
2107 out_quota_failed:
2108         iwl_mvm_power_update_mac(mvm);
2109         mvmvif->ap_ibss_active = false;
2110         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2111 out_unbind:
2112         iwl_mvm_binding_remove_vif(mvm, vif);
2113 out_remove:
2114         iwl_mvm_mac_ctxt_remove(mvm, vif);
2115 out_unlock:
2116         mutex_unlock(&mvm->mutex);
2117         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2118         return ret;
2119 }
2120
2121 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2122                                  struct ieee80211_vif *vif)
2123 {
2124         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2125         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2126
2127         iwl_mvm_prepare_mac_removal(mvm, vif);
2128
2129         mutex_lock(&mvm->mutex);
2130
2131         /* Handle AP stop while in CSA */
2132         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2133                 iwl_mvm_remove_time_event(mvm, mvmvif,
2134                                           &mvmvif->time_event_data);
2135                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2136                 mvmvif->csa_countdown = false;
2137         }
2138
2139         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2140                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2141                 mvm->csa_tx_block_bcn_timeout = 0;
2142         }
2143
2144         mvmvif->ap_ibss_active = false;
2145         mvm->ap_last_beacon_gp2 = 0;
2146
2147         iwl_mvm_bt_coex_vif_change(mvm);
2148
2149         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2150
2151         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2152         if (vif->p2p && mvm->p2p_device_vif)
2153                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2154
2155         iwl_mvm_update_quotas(mvm, false, NULL);
2156         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2157         iwl_mvm_binding_remove_vif(mvm, vif);
2158
2159         iwl_mvm_power_update_mac(mvm);
2160
2161         iwl_mvm_mac_ctxt_remove(mvm, vif);
2162
2163         mutex_unlock(&mvm->mutex);
2164 }
2165
2166 static void
2167 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2168                                  struct ieee80211_vif *vif,
2169                                  struct ieee80211_bss_conf *bss_conf,
2170                                  u32 changes)
2171 {
2172         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2173
2174         /* Changes will be applied when the AP/IBSS is started */
2175         if (!mvmvif->ap_ibss_active)
2176                 return;
2177
2178         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2179                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2180             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2181                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2182
2183         /* Need to send a new beacon template to the FW */
2184         if (changes & BSS_CHANGED_BEACON &&
2185             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2186                 IWL_WARN(mvm, "Failed updating beacon data\n");
2187
2188         if (changes & BSS_CHANGED_TXPOWER) {
2189                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2190                                 bss_conf->txpower);
2191                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2192         }
2193 }
2194
2195 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2196                                      struct ieee80211_vif *vif,
2197                                      struct ieee80211_bss_conf *bss_conf,
2198                                      u32 changes)
2199 {
2200         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2201
2202         /*
2203          * iwl_mvm_bss_info_changed_station() might call
2204          * iwl_mvm_protect_session(), which reads directly from
2205          * the device (the system time), so make sure it is available.
2206          */
2207         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2208                 return;
2209
2210         mutex_lock(&mvm->mutex);
2211
2212         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2213                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2214
2215         switch (vif->type) {
2216         case NL80211_IFTYPE_STATION:
2217                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2218                 break;
2219         case NL80211_IFTYPE_AP:
2220         case NL80211_IFTYPE_ADHOC:
2221                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2222                 break;
2223         default:
2224                 /* shouldn't happen */
2225                 WARN_ON_ONCE(1);
2226         }
2227
2228         mutex_unlock(&mvm->mutex);
2229         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2230 }
2231
2232 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2233                                struct ieee80211_vif *vif,
2234                                struct ieee80211_scan_request *hw_req)
2235 {
2236         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2237         int ret;
2238
2239         if (hw_req->req.n_channels == 0 ||
2240             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2241                 return -EINVAL;
2242
2243         mutex_lock(&mvm->mutex);
2244         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2245         mutex_unlock(&mvm->mutex);
2246
2247         return ret;
2248 }
2249
2250 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2251                                        struct ieee80211_vif *vif)
2252 {
2253         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2254
2255         mutex_lock(&mvm->mutex);
2256
2257         /* Due to a race condition, it's possible that mac80211 asks
2258          * us to stop a hw_scan when it's already stopped.  This can
2259          * happen, for instance, if we stopped the scan ourselves,
2260          * called ieee80211_scan_completed() and the userspace called
2261          * cancel scan scan before ieee80211_scan_work() could run.
2262          * To handle that, simply return if the scan is not running.
2263         */
2264         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2265                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2266
2267         mutex_unlock(&mvm->mutex);
2268 }
2269
2270 static void
2271 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2272                                   struct ieee80211_sta *sta, u16 tids,
2273                                   int num_frames,
2274                                   enum ieee80211_frame_release_type reason,
2275                                   bool more_data)
2276 {
2277         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2278
2279         /* Called when we need to transmit (a) frame(s) from mac80211 */
2280
2281         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2282                                           tids, more_data, false);
2283 }
2284
2285 static void
2286 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2287                                     struct ieee80211_sta *sta, u16 tids,
2288                                     int num_frames,
2289                                     enum ieee80211_frame_release_type reason,
2290                                     bool more_data)
2291 {
2292         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2293
2294         /* Called when we need to transmit (a) frame(s) from agg queue */
2295
2296         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2297                                           tids, more_data, true);
2298 }
2299
2300 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2301                                    struct ieee80211_vif *vif,
2302                                    enum sta_notify_cmd cmd,
2303                                    struct ieee80211_sta *sta)
2304 {
2305         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2306         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2307         unsigned long txqs = 0, tids = 0;
2308         int tid;
2309
2310         spin_lock_bh(&mvmsta->lock);
2311         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2312                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2313
2314                 if (tid_data->state != IWL_AGG_ON &&
2315                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2316                         continue;
2317
2318                 __set_bit(tid_data->txq_id, &txqs);
2319
2320                 if (iwl_mvm_tid_queued(tid_data) == 0)
2321                         continue;
2322
2323                 __set_bit(tid, &tids);
2324         }
2325
2326         switch (cmd) {
2327         case STA_NOTIFY_SLEEP:
2328                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2329                         ieee80211_sta_block_awake(hw, sta, true);
2330
2331                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2332                         ieee80211_sta_set_buffered(sta, tid, true);
2333
2334                 if (txqs)
2335                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2336                 /*
2337                  * The fw updates the STA to be asleep. Tx packets on the Tx
2338                  * queues to this station will not be transmitted. The fw will
2339                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2340                  */
2341                 break;
2342         case STA_NOTIFY_AWAKE:
2343                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2344                         break;
2345
2346                 if (txqs)
2347                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2348                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2349                 break;
2350         default:
2351                 break;
2352         }
2353         spin_unlock_bh(&mvmsta->lock);
2354 }
2355
2356 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2357                                        struct ieee80211_vif *vif,
2358                                        struct ieee80211_sta *sta)
2359 {
2360         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2361         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2362
2363         /*
2364          * This is called before mac80211 does RCU synchronisation,
2365          * so here we already invalidate our internal RCU-protected
2366          * station pointer. The rest of the code will thus no longer
2367          * be able to find the station this way, and we don't rely
2368          * on further RCU synchronisation after the sta_state()
2369          * callback deleted the station.
2370          */
2371         mutex_lock(&mvm->mutex);
2372         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2373                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2374                                    ERR_PTR(-ENOENT));
2375
2376         mutex_unlock(&mvm->mutex);
2377 }
2378
2379 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2380                                 const u8 *bssid)
2381 {
2382         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2383                 return;
2384
2385         if (vif->p2p && !iwl_mvm_is_p2p_scm_uapsd_supported(mvm)) {
2386                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2387                 return;
2388         }
2389
2390         if (!vif->p2p &&
2391             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2392                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2393                 return;
2394         }
2395
2396         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2397 }
2398
2399 static void
2400 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2401                            struct ieee80211_vif *vif, u8 *peer_addr,
2402                            enum nl80211_tdls_operation action)
2403 {
2404         struct iwl_fw_dbg_trigger_tlv *trig;
2405         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2406
2407         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2408                 return;
2409
2410         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2411         tdls_trig = (void *)trig->data;
2412         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2413                 return;
2414
2415         if (!(tdls_trig->action_bitmap & BIT(action)))
2416                 return;
2417
2418         if (tdls_trig->peer_mode &&
2419             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2420                 return;
2421
2422         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2423                                     "TDLS event occurred, peer %pM, action %d",
2424                                     peer_addr, action);
2425 }
2426
2427 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2428                                              struct iwl_mvm_sta *mvm_sta)
2429 {
2430         struct iwl_mvm_tid_data *tid_data;
2431         struct sk_buff *skb;
2432         int i;
2433
2434         spin_lock_bh(&mvm_sta->lock);
2435         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2436                 tid_data = &mvm_sta->tid_data[i];
2437                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2438                         ieee80211_free_txskb(mvm->hw, skb);
2439         }
2440         spin_unlock_bh(&mvm_sta->lock);
2441 }
2442
2443 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2444                                  struct ieee80211_vif *vif,
2445                                  struct ieee80211_sta *sta,
2446                                  enum ieee80211_sta_state old_state,
2447                                  enum ieee80211_sta_state new_state)
2448 {
2449         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2450         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2451         int ret;
2452
2453         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2454                            sta->addr, old_state, new_state);
2455
2456         /* this would be a mac80211 bug ... but don't crash */
2457         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2458                 return -EINVAL;
2459
2460         /* if a STA is being removed, reuse its ID */
2461         flush_work(&mvm->sta_drained_wk);
2462
2463         /*
2464          * If we are in a STA removal flow and in DQA mode:
2465          *
2466          * This is after the sync_rcu part, so the queues have already been
2467          * flushed. No more TXs on their way in mac80211's path, and no more in
2468          * the queues.
2469          * Also, we won't be getting any new TX frames for this station.
2470          * What we might have are deferred TX frames that need to be taken care
2471          * of.
2472          *
2473          * Drop any still-queued deferred-frame before removing the STA, and
2474          * make sure the worker is no longer handling frames for this STA.
2475          */
2476         if (old_state == IEEE80211_STA_NONE &&
2477             new_state == IEEE80211_STA_NOTEXIST &&
2478             iwl_mvm_is_dqa_supported(mvm)) {
2479                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2480
2481                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2482                 flush_work(&mvm->add_stream_wk);
2483
2484                 /*
2485                  * No need to make sure deferred TX indication is off since the
2486                  * worker will already remove it if it was on
2487                  */
2488         }
2489
2490         mutex_lock(&mvm->mutex);
2491         if (old_state == IEEE80211_STA_NOTEXIST &&
2492             new_state == IEEE80211_STA_NONE) {
2493                 /*
2494                  * Firmware bug - it'll crash if the beacon interval is less
2495                  * than 16. We can't avoid connecting at all, so refuse the
2496                  * station state change, this will cause mac80211 to abandon
2497                  * attempts to connect to this AP, and eventually wpa_s will
2498                  * blacklist the AP...
2499                  */
2500                 if (vif->type == NL80211_IFTYPE_STATION &&
2501                     vif->bss_conf.beacon_int < 16) {
2502                         IWL_ERR(mvm,
2503                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2504                                 sta->addr, vif->bss_conf.beacon_int);
2505                         ret = -EINVAL;
2506                         goto out_unlock;
2507                 }
2508
2509                 if (sta->tdls &&
2510                     (vif->p2p ||
2511                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2512                                                 IWL_MVM_TDLS_STA_COUNT ||
2513                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2514                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2515                         ret = -EBUSY;
2516                         goto out_unlock;
2517                 }
2518
2519                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2520                 if (sta->tdls && ret == 0) {
2521                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2522                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2523                                                    NL80211_TDLS_SETUP);
2524                 }
2525         } else if (old_state == IEEE80211_STA_NONE &&
2526                    new_state == IEEE80211_STA_AUTH) {
2527                 /*
2528                  * EBS may be disabled due to previous failures reported by FW.
2529                  * Reset EBS status here assuming environment has been changed.
2530                  */
2531                 mvm->last_ebs_successful = true;
2532                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2533                 ret = 0;
2534         } else if (old_state == IEEE80211_STA_AUTH &&
2535                    new_state == IEEE80211_STA_ASSOC) {
2536                 if (vif->type == NL80211_IFTYPE_AP) {
2537                         mvmvif->ap_assoc_sta_count++;
2538                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2539                 }
2540                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2541                 if (ret == 0)
2542                         iwl_mvm_rs_rate_init(mvm, sta,
2543                                              mvmvif->phy_ctxt->channel->band,
2544                                              true);
2545         } else if (old_state == IEEE80211_STA_ASSOC &&
2546                    new_state == IEEE80211_STA_AUTHORIZED) {
2547
2548                 /* we don't support TDLS during DCM */
2549                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2550                         iwl_mvm_teardown_tdls_peers(mvm);
2551
2552                 if (sta->tdls)
2553                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2554                                                    NL80211_TDLS_ENABLE_LINK);
2555
2556                 /* enable beacon filtering */
2557                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2558                 ret = 0;
2559         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2560                    new_state == IEEE80211_STA_ASSOC) {
2561                 /* disable beacon filtering */
2562                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2563                 ret = 0;
2564         } else if (old_state == IEEE80211_STA_ASSOC &&
2565                    new_state == IEEE80211_STA_AUTH) {
2566                 if (vif->type == NL80211_IFTYPE_AP) {
2567                         mvmvif->ap_assoc_sta_count--;
2568                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2569                 }
2570                 ret = 0;
2571         } else if (old_state == IEEE80211_STA_AUTH &&
2572                    new_state == IEEE80211_STA_NONE) {
2573                 ret = 0;
2574         } else if (old_state == IEEE80211_STA_NONE &&
2575                    new_state == IEEE80211_STA_NOTEXIST) {
2576                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2577                 if (sta->tdls) {
2578                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2579                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2580                                                    NL80211_TDLS_DISABLE_LINK);
2581                 }
2582         } else {
2583                 ret = -EIO;
2584         }
2585  out_unlock:
2586         mutex_unlock(&mvm->mutex);
2587
2588         if (sta->tdls && ret == 0) {
2589                 if (old_state == IEEE80211_STA_NOTEXIST &&
2590                     new_state == IEEE80211_STA_NONE)
2591                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2592                 else if (old_state == IEEE80211_STA_NONE &&
2593                          new_state == IEEE80211_STA_NOTEXIST)
2594                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2595         }
2596
2597         return ret;
2598 }
2599
2600 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2601 {
2602         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2603
2604         mvm->rts_threshold = value;
2605
2606         return 0;
2607 }
2608
2609 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2610                                   struct ieee80211_vif *vif,
2611                                   struct ieee80211_sta *sta, u32 changed)
2612 {
2613         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2614
2615         if (vif->type == NL80211_IFTYPE_STATION &&
2616             changed & IEEE80211_RC_NSS_CHANGED)
2617                 iwl_mvm_sf_update(mvm, vif, false);
2618 }
2619
2620 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2621                                struct ieee80211_vif *vif, u16 ac,
2622                                const struct ieee80211_tx_queue_params *params)
2623 {
2624         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2625         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2626
2627         mvmvif->queue_params[ac] = *params;
2628
2629         /*
2630          * No need to update right away, we'll get BSS_CHANGED_QOS
2631          * The exception is P2P_DEVICE interface which needs immediate update.
2632          */
2633         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2634                 int ret;
2635
2636                 mutex_lock(&mvm->mutex);
2637                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2638                 mutex_unlock(&mvm->mutex);
2639                 return ret;
2640         }
2641         return 0;
2642 }
2643
2644 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2645                                       struct ieee80211_vif *vif)
2646 {
2647         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2648         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2649         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2650
2651         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2652                 return;
2653
2654         /*
2655          * iwl_mvm_protect_session() reads directly from the device
2656          * (the system time), so make sure it is available.
2657          */
2658         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2659                 return;
2660
2661         mutex_lock(&mvm->mutex);
2662         /* Try really hard to protect the session and hear a beacon */
2663         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2664         mutex_unlock(&mvm->mutex);
2665
2666         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2667 }
2668
2669 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2670                                         struct ieee80211_vif *vif,
2671                                         struct cfg80211_sched_scan_request *req,
2672                                         struct ieee80211_scan_ies *ies)
2673 {
2674         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2675
2676         int ret;
2677
2678         mutex_lock(&mvm->mutex);
2679
2680         if (!vif->bss_conf.idle) {
2681                 ret = -EBUSY;
2682                 goto out;
2683         }
2684
2685         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2686
2687 out:
2688         mutex_unlock(&mvm->mutex);
2689         return ret;
2690 }
2691
2692 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2693                                        struct ieee80211_vif *vif)
2694 {
2695         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2696         int ret;
2697
2698         mutex_lock(&mvm->mutex);
2699
2700         /* Due to a race condition, it's possible that mac80211 asks
2701          * us to stop a sched_scan when it's already stopped.  This
2702          * can happen, for instance, if we stopped the scan ourselves,
2703          * called ieee80211_sched_scan_stopped() and the userspace called
2704          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2705          * could run.  To handle this, simply return if the scan is
2706          * not running.
2707         */
2708         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2709                 mutex_unlock(&mvm->mutex);
2710                 return 0;
2711         }
2712
2713         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2714         mutex_unlock(&mvm->mutex);
2715         iwl_mvm_wait_for_async_handlers(mvm);
2716
2717         return ret;
2718 }
2719
2720 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2721                                enum set_key_cmd cmd,
2722                                struct ieee80211_vif *vif,
2723                                struct ieee80211_sta *sta,
2724                                struct ieee80211_key_conf *key)
2725 {
2726         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2727         struct iwl_mvm_sta *mvmsta;
2728         struct iwl_mvm_key_pn *ptk_pn;
2729         int keyidx = key->keyidx;
2730         int ret;
2731         u8 key_offset;
2732
2733         if (iwlwifi_mod_params.sw_crypto) {
2734                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2735                 return -EOPNOTSUPP;
2736         }
2737
2738         switch (key->cipher) {
2739         case WLAN_CIPHER_SUITE_TKIP:
2740                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2741                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2742                 break;
2743         case WLAN_CIPHER_SUITE_CCMP:
2744         case WLAN_CIPHER_SUITE_GCMP:
2745         case WLAN_CIPHER_SUITE_GCMP_256:
2746                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2747                 break;
2748         case WLAN_CIPHER_SUITE_AES_CMAC:
2749                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2750                 break;
2751         case WLAN_CIPHER_SUITE_WEP40:
2752         case WLAN_CIPHER_SUITE_WEP104:
2753                 /* For non-client mode, only use WEP keys for TX as we probably
2754                  * don't have a station yet anyway and would then have to keep
2755                  * track of the keys, linking them to each of the clients/peers
2756                  * as they appear. For now, don't do that, for performance WEP
2757                  * offload doesn't really matter much, but we need it for some
2758                  * other offload features in client mode.
2759                  */
2760                 if (vif->type != NL80211_IFTYPE_STATION)
2761                         return 0;
2762                 break;
2763         default:
2764                 /* currently FW supports only one optional cipher scheme */
2765                 if (hw->n_cipher_schemes &&
2766                     hw->cipher_schemes->cipher == key->cipher)
2767                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2768                 else
2769                         return -EOPNOTSUPP;
2770         }
2771
2772         mutex_lock(&mvm->mutex);
2773
2774         switch (cmd) {
2775         case SET_KEY:
2776                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2777                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2778                         /*
2779                          * GTK on AP interface is a TX-only key, return 0;
2780                          * on IBSS they're per-station and because we're lazy
2781                          * we don't support them for RX, so do the same.
2782                          * CMAC in AP/IBSS modes must be done in software.
2783                          */
2784                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2785                                 ret = -EOPNOTSUPP;
2786                         else
2787                                 ret = 0;
2788                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2789                         break;
2790                 }
2791
2792                 /* During FW restart, in order to restore the state as it was,
2793                  * don't try to reprogram keys we previously failed for.
2794                  */
2795                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2796                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2797                         IWL_DEBUG_MAC80211(mvm,
2798                                            "skip invalid idx key programming during restart\n");
2799                         ret = 0;
2800                         break;
2801                 }
2802
2803                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2804                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2805                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2806                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2807                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2808                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2809                         struct ieee80211_key_seq seq;
2810                         int tid, q;
2811
2812                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2813                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2814                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2815                                          mvm->trans->num_rx_queues *
2816                                                 sizeof(ptk_pn->q[0]),
2817                                          GFP_KERNEL);
2818                         if (!ptk_pn) {
2819                                 ret = -ENOMEM;
2820                                 break;
2821                         }
2822
2823                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2824                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2825                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2826                                         memcpy(ptk_pn->q[q].pn[tid],
2827                                                seq.ccmp.pn,
2828                                                IEEE80211_CCMP_PN_LEN);
2829                         }
2830
2831                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2832                 }
2833
2834                 /* in HW restart reuse the index, otherwise request a new one */
2835                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2836                         key_offset = key->hw_key_idx;
2837                 else
2838                         key_offset = STA_KEY_IDX_INVALID;
2839
2840                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2841                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2842                 if (ret) {
2843                         IWL_WARN(mvm, "set key failed\n");
2844                         /*
2845                          * can't add key for RX, but we don't need it
2846                          * in the device for TX so still return 0
2847                          */
2848                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2849                         ret = 0;
2850                 }
2851
2852                 break;
2853         case DISABLE_KEY:
2854                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2855                         ret = 0;
2856                         break;
2857                 }
2858
2859                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2860                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2861                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2862                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2863                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2864                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2865                         ptk_pn = rcu_dereference_protected(
2866                                                 mvmsta->ptk_pn[keyidx],
2867                                                 lockdep_is_held(&mvm->mutex));
2868                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2869                         if (ptk_pn)
2870                                 kfree_rcu(ptk_pn, rcu_head);
2871                 }
2872
2873                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2874                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2875                 break;
2876         default:
2877                 ret = -EINVAL;
2878         }
2879
2880         mutex_unlock(&mvm->mutex);
2881         return ret;
2882 }
2883
2884 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2885                                         struct ieee80211_vif *vif,
2886                                         struct ieee80211_key_conf *keyconf,
2887                                         struct ieee80211_sta *sta,
2888                                         u32 iv32, u16 *phase1key)
2889 {
2890         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2891
2892         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2893                 return;
2894
2895         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2896 }
2897
2898
2899 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2900                                struct iwl_rx_packet *pkt, void *data)
2901 {
2902         struct iwl_mvm *mvm =
2903                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2904         struct iwl_hs20_roc_res *resp;
2905         int resp_len = iwl_rx_packet_payload_len(pkt);
2906         struct iwl_mvm_time_event_data *te_data = data;
2907
2908         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2909                 return true;
2910
2911         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2912                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2913                 return true;
2914         }
2915
2916         resp = (void *)pkt->data;
2917
2918         IWL_DEBUG_TE(mvm,
2919                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2920                      resp->status, resp->event_unique_id);
2921
2922         te_data->uid = le32_to_cpu(resp->event_unique_id);
2923         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2924                      te_data->uid);
2925
2926         spin_lock_bh(&mvm->time_event_lock);
2927         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2928         spin_unlock_bh(&mvm->time_event_lock);
2929
2930         return true;
2931 }
2932
2933 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2934 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2935 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2936 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2937 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2938 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2939                                     struct ieee80211_channel *channel,
2940                                     struct ieee80211_vif *vif,
2941                                     int duration)
2942 {
2943         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2944         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2945         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2946         static const u16 time_event_response[] = { HOT_SPOT_CMD };
2947         struct iwl_notification_wait wait_time_event;
2948         u32 dtim_interval = vif->bss_conf.dtim_period *
2949                 vif->bss_conf.beacon_int;
2950         u32 req_dur, delay;
2951         struct iwl_hs20_roc_req aux_roc_req = {
2952                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2953                 .id_and_color =
2954                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2955                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2956                 /* Set the channel info data */
2957                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
2958                         PHY_BAND_24 : PHY_BAND_5,
2959                 .channel_info.channel = channel->hw_value,
2960                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2961                 /* Set the time and duration */
2962                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2963          };
2964
2965         delay = AUX_ROC_MIN_DELAY;
2966         req_dur = MSEC_TO_TU(duration);
2967
2968         /*
2969          * If we are associated we want the delay time to be at least one
2970          * dtim interval so that the FW can wait until after the DTIM and
2971          * then start the time event, this will potentially allow us to
2972          * remain off-channel for the max duration.
2973          * Since we want to use almost a whole dtim interval we would also
2974          * like the delay to be for 2-3 dtim intervals, in case there are
2975          * other time events with higher priority.
2976          */
2977         if (vif->bss_conf.assoc) {
2978                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
2979                 /* We cannot remain off-channel longer than the DTIM interval */
2980                 if (dtim_interval <= req_dur) {
2981                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
2982                         if (req_dur <= AUX_ROC_MIN_DURATION)
2983                                 req_dur = dtim_interval -
2984                                         AUX_ROC_MIN_SAFETY_BUFFER;
2985                 }
2986         }
2987
2988         aux_roc_req.duration = cpu_to_le32(req_dur);
2989         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
2990
2991         IWL_DEBUG_TE(mvm,
2992                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
2993                      channel->hw_value, req_dur, duration, delay,
2994                      dtim_interval);
2995         /* Set the node address */
2996         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2997
2998         lockdep_assert_held(&mvm->mutex);
2999
3000         spin_lock_bh(&mvm->time_event_lock);
3001
3002         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3003                 spin_unlock_bh(&mvm->time_event_lock);
3004                 return -EIO;
3005         }
3006
3007         te_data->vif = vif;
3008         te_data->duration = duration;
3009         te_data->id = HOT_SPOT_CMD;
3010
3011         spin_unlock_bh(&mvm->time_event_lock);
3012
3013         /*
3014          * Use a notification wait, which really just processes the
3015          * command response and doesn't wait for anything, in order
3016          * to be able to process the response and get the UID inside
3017          * the RX path. Using CMD_WANT_SKB doesn't work because it
3018          * stores the buffer and then wakes up this thread, by which
3019          * time another notification (that the time event started)
3020          * might already be processed unsuccessfully.
3021          */
3022         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3023                                    time_event_response,
3024                                    ARRAY_SIZE(time_event_response),
3025                                    iwl_mvm_rx_aux_roc, te_data);
3026
3027         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3028                                    &aux_roc_req);
3029
3030         if (res) {
3031                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3032                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3033                 goto out_clear_te;
3034         }
3035
3036         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3037         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3038         /* should never fail */
3039         WARN_ON_ONCE(res);
3040
3041         if (res) {
3042  out_clear_te:
3043                 spin_lock_bh(&mvm->time_event_lock);
3044                 iwl_mvm_te_clear_data(mvm, te_data);
3045                 spin_unlock_bh(&mvm->time_event_lock);
3046         }
3047
3048         return res;
3049 }
3050
3051 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3052                        struct ieee80211_vif *vif,
3053                        struct ieee80211_channel *channel,
3054                        int duration,
3055                        enum ieee80211_roc_type type)
3056 {
3057         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3058         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3059         struct cfg80211_chan_def chandef;
3060         struct iwl_mvm_phy_ctxt *phy_ctxt;
3061         int ret, i;
3062
3063         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3064                            duration, type);
3065
3066         flush_work(&mvm->roc_done_wk);
3067
3068         mutex_lock(&mvm->mutex);
3069
3070         switch (vif->type) {
3071         case NL80211_IFTYPE_STATION:
3072                 if (fw_has_capa(&mvm->fw->ucode_capa,
3073                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3074                         /* Use aux roc framework (HS20) */
3075                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3076                                                        vif, duration);
3077                         goto out_unlock;
3078                 }
3079                 IWL_ERR(mvm, "hotspot not supported\n");
3080                 ret = -EINVAL;
3081                 goto out_unlock;
3082         case NL80211_IFTYPE_P2P_DEVICE:
3083                 /* handle below */
3084                 break;
3085         default:
3086                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3087                 ret = -EINVAL;
3088                 goto out_unlock;
3089         }
3090
3091         for (i = 0; i < NUM_PHY_CTX; i++) {
3092                 phy_ctxt = &mvm->phy_ctxts[i];
3093                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3094                         continue;
3095
3096                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3097                         /*
3098                          * Unbind the P2P_DEVICE from the current PHY context,
3099                          * and if the PHY context is not used remove it.
3100                          */
3101                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3102                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3103                                 goto out_unlock;
3104
3105                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3106
3107                         /* Bind the P2P_DEVICE to the current PHY Context */
3108                         mvmvif->phy_ctxt = phy_ctxt;
3109
3110                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3111                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3112                                 goto out_unlock;
3113
3114                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3115                         goto schedule_time_event;
3116                 }
3117         }
3118
3119         /* Need to update the PHY context only if the ROC channel changed */
3120         if (channel == mvmvif->phy_ctxt->channel)
3121                 goto schedule_time_event;
3122
3123         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3124
3125         /*
3126          * Change the PHY context configuration as it is currently referenced
3127          * only by the P2P Device MAC
3128          */
3129         if (mvmvif->phy_ctxt->ref == 1) {
3130                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3131                                                &chandef, 1, 1);
3132                 if (ret)
3133                         goto out_unlock;
3134         } else {
3135                 /*
3136                  * The PHY context is shared with other MACs. Need to remove the
3137                  * P2P Device from the binding, allocate an new PHY context and
3138                  * create a new binding
3139                  */
3140                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3141                 if (!phy_ctxt) {
3142                         ret = -ENOSPC;
3143                         goto out_unlock;
3144                 }
3145
3146                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3147                                                1, 1);
3148                 if (ret) {
3149                         IWL_ERR(mvm, "Failed to change PHY context\n");
3150                         goto out_unlock;
3151                 }
3152
3153                 /* Unbind the P2P_DEVICE from the current PHY context */
3154                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3155                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3156                         goto out_unlock;
3157
3158                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3159
3160                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3161                 mvmvif->phy_ctxt = phy_ctxt;
3162
3163                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3164                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3165                         goto out_unlock;
3166
3167                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3168         }
3169
3170 schedule_time_event:
3171         /* Schedule the time events */
3172         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3173
3174 out_unlock:
3175         mutex_unlock(&mvm->mutex);
3176         IWL_DEBUG_MAC80211(mvm, "leave\n");
3177         return ret;
3178 }
3179
3180 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3181 {
3182         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3183
3184         IWL_DEBUG_MAC80211(mvm, "enter\n");
3185
3186         mutex_lock(&mvm->mutex);
3187         iwl_mvm_stop_roc(mvm);
3188         mutex_unlock(&mvm->mutex);
3189
3190         IWL_DEBUG_MAC80211(mvm, "leave\n");
3191         return 0;
3192 }
3193
3194 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3195                                  struct ieee80211_chanctx_conf *ctx)
3196 {
3197         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3198         struct iwl_mvm_phy_ctxt *phy_ctxt;
3199         int ret;
3200
3201         lockdep_assert_held(&mvm->mutex);
3202
3203         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3204
3205         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3206         if (!phy_ctxt) {
3207                 ret = -ENOSPC;
3208                 goto out;
3209         }
3210
3211         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3212                                        ctx->rx_chains_static,
3213                                        ctx->rx_chains_dynamic);
3214         if (ret) {
3215                 IWL_ERR(mvm, "Failed to add PHY context\n");
3216                 goto out;
3217         }
3218
3219         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3220         *phy_ctxt_id = phy_ctxt->id;
3221 out:
3222         return ret;
3223 }
3224
3225 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3226                                struct ieee80211_chanctx_conf *ctx)
3227 {
3228         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3229         int ret;
3230
3231         mutex_lock(&mvm->mutex);
3232         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3233         mutex_unlock(&mvm->mutex);
3234
3235         return ret;
3236 }
3237
3238 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3239                                      struct ieee80211_chanctx_conf *ctx)
3240 {
3241         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3242         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3243
3244         lockdep_assert_held(&mvm->mutex);
3245
3246         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3247 }
3248
3249 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3250                                    struct ieee80211_chanctx_conf *ctx)
3251 {
3252         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3253
3254         mutex_lock(&mvm->mutex);
3255         __iwl_mvm_remove_chanctx(mvm, ctx);
3256         mutex_unlock(&mvm->mutex);
3257 }
3258
3259 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3260                                    struct ieee80211_chanctx_conf *ctx,
3261                                    u32 changed)
3262 {
3263         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3264         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3265         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3266
3267         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3268                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3269                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3270                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3271                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3272                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3273                       phy_ctxt->ref, changed))
3274                 return;
3275
3276         mutex_lock(&mvm->mutex);
3277         iwl_mvm_bt_coex_vif_change(mvm);
3278         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3279                                  ctx->rx_chains_static,
3280                                  ctx->rx_chains_dynamic);
3281         mutex_unlock(&mvm->mutex);
3282 }
3283
3284 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3285                                         struct ieee80211_vif *vif,
3286                                         struct ieee80211_chanctx_conf *ctx,
3287                                         bool switching_chanctx)
3288 {
3289         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3290         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3291         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3292         int ret;
3293
3294         lockdep_assert_held(&mvm->mutex);
3295
3296         mvmvif->phy_ctxt = phy_ctxt;
3297
3298         switch (vif->type) {
3299         case NL80211_IFTYPE_AP:
3300                 /* only needed if we're switching chanctx (i.e. during CSA) */
3301                 if (switching_chanctx) {
3302                         mvmvif->ap_ibss_active = true;
3303                         break;
3304                 }
3305         case NL80211_IFTYPE_ADHOC:
3306                 /*
3307                  * The AP binding flow is handled as part of the start_ap flow
3308                  * (in bss_info_changed), similarly for IBSS.
3309                  */
3310                 ret = 0;
3311                 goto out;
3312         case NL80211_IFTYPE_STATION:
3313                 break;
3314         case NL80211_IFTYPE_MONITOR:
3315                 /* always disable PS when a monitor interface is active */
3316                 mvmvif->ps_disabled = true;
3317                 break;
3318         default:
3319                 ret = -EINVAL;
3320                 goto out;
3321         }
3322
3323         ret = iwl_mvm_binding_add_vif(mvm, vif);
3324         if (ret)
3325                 goto out;
3326
3327         /*
3328          * Power state must be updated before quotas,
3329          * otherwise fw will complain.
3330          */
3331         iwl_mvm_power_update_mac(mvm);
3332
3333         /* Setting the quota at this stage is only required for monitor
3334          * interfaces. For the other types, the bss_info changed flow
3335          * will handle quota settings.
3336          */
3337         if (vif->type == NL80211_IFTYPE_MONITOR) {
3338                 mvmvif->monitor_active = true;
3339                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3340                 if (ret)
3341                         goto out_remove_binding;
3342
3343                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3344                 if (ret)
3345                         goto out_remove_binding;
3346
3347         }
3348
3349         /* Handle binding during CSA */
3350         if (vif->type == NL80211_IFTYPE_AP) {
3351                 iwl_mvm_update_quotas(mvm, false, NULL);
3352                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3353         }
3354
3355         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3356                 u32 duration = 2 * vif->bss_conf.beacon_int;
3357
3358                 /* iwl_mvm_protect_session() reads directly from the
3359                  * device (the system time), so make sure it is
3360                  * available.
3361                  */
3362                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3363                 if (ret)
3364                         goto out_remove_binding;
3365
3366                 /* Protect the session to make sure we hear the first
3367                  * beacon on the new channel.
3368                  */
3369                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3370                                         vif->bss_conf.beacon_int / 2,
3371                                         true);
3372
3373                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3374
3375                 iwl_mvm_update_quotas(mvm, false, NULL);
3376         }
3377
3378         goto out;
3379
3380 out_remove_binding:
3381         iwl_mvm_binding_remove_vif(mvm, vif);
3382         iwl_mvm_power_update_mac(mvm);
3383 out:
3384         if (ret)
3385                 mvmvif->phy_ctxt = NULL;
3386         return ret;
3387 }
3388 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3389                                       struct ieee80211_vif *vif,
3390                                       struct ieee80211_chanctx_conf *ctx)
3391 {
3392         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3393         int ret;
3394
3395         mutex_lock(&mvm->mutex);
3396         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3397         mutex_unlock(&mvm->mutex);
3398
3399         return ret;
3400 }
3401
3402 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3403                                            struct ieee80211_vif *vif,
3404                                            struct ieee80211_chanctx_conf *ctx,
3405                                            bool switching_chanctx)
3406 {
3407         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3408         struct ieee80211_vif *disabled_vif = NULL;
3409
3410         lockdep_assert_held(&mvm->mutex);
3411
3412         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3413
3414         switch (vif->type) {
3415         case NL80211_IFTYPE_ADHOC:
3416                 goto out;
3417         case NL80211_IFTYPE_MONITOR:
3418                 mvmvif->monitor_active = false;
3419                 mvmvif->ps_disabled = false;
3420                 iwl_mvm_rm_snif_sta(mvm, vif);
3421                 break;
3422         case NL80211_IFTYPE_AP:
3423                 /* This part is triggered only during CSA */
3424                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3425                         goto out;
3426
3427                 mvmvif->csa_countdown = false;
3428
3429                 /* Set CS bit on all the stations */
3430                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3431
3432                 /* Save blocked iface, the timeout is set on the next beacon */
3433                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3434
3435                 mvmvif->ap_ibss_active = false;
3436                 break;
3437         case NL80211_IFTYPE_STATION:
3438                 if (!switching_chanctx)
3439                         break;
3440
3441                 disabled_vif = vif;
3442
3443                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3444                 break;
3445         default:
3446                 break;
3447         }
3448
3449         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3450         iwl_mvm_binding_remove_vif(mvm, vif);
3451
3452 out:
3453         mvmvif->phy_ctxt = NULL;
3454         iwl_mvm_power_update_mac(mvm);
3455 }
3456
3457 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3458                                          struct ieee80211_vif *vif,
3459                                          struct ieee80211_chanctx_conf *ctx)
3460 {
3461         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3462
3463         mutex_lock(&mvm->mutex);
3464         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3465         mutex_unlock(&mvm->mutex);
3466 }
3467
3468 static int
3469 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3470                                 struct ieee80211_vif_chanctx_switch *vifs)
3471 {
3472         int ret;
3473
3474         mutex_lock(&mvm->mutex);
3475         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3476         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3477
3478         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3479         if (ret) {
3480                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3481                 goto out_reassign;
3482         }
3483
3484         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3485                                            true);
3486         if (ret) {
3487                 IWL_ERR(mvm,
3488                         "failed to assign new_ctx during channel switch\n");
3489                 goto out_remove;
3490         }
3491
3492         /* we don't support TDLS during DCM - can be caused by channel switch */
3493         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3494                 iwl_mvm_teardown_tdls_peers(mvm);
3495
3496         goto out;
3497
3498 out_remove:
3499         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3500
3501 out_reassign:
3502         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3503                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3504                 goto out_restart;
3505         }
3506
3507         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3508                                          true)) {
3509                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3510                 goto out_restart;
3511         }
3512
3513         goto out;
3514
3515 out_restart:
3516         /* things keep failing, better restart the hw */
3517         iwl_mvm_nic_restart(mvm, false);
3518
3519 out:
3520         mutex_unlock(&mvm->mutex);
3521
3522         return ret;
3523 }
3524
3525 static int
3526 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3527                                     struct ieee80211_vif_chanctx_switch *vifs)
3528 {
3529         int ret;
3530
3531         mutex_lock(&mvm->mutex);
3532         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3533
3534         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3535                                            true);
3536         if (ret) {
3537                 IWL_ERR(mvm,
3538                         "failed to assign new_ctx during channel switch\n");
3539                 goto out_reassign;
3540         }
3541
3542         goto out;
3543
3544 out_reassign:
3545         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3546                                          true)) {
3547                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3548                 goto out_restart;
3549         }
3550
3551         goto out;
3552
3553 out_restart:
3554         /* things keep failing, better restart the hw */
3555         iwl_mvm_nic_restart(mvm, false);
3556
3557 out:
3558         mutex_unlock(&mvm->mutex);
3559
3560         return ret;
3561 }
3562
3563 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3564                                       struct ieee80211_vif_chanctx_switch *vifs,
3565                                       int n_vifs,
3566                                       enum ieee80211_chanctx_switch_mode mode)
3567 {
3568         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3569         int ret;
3570
3571         /* we only support a single-vif right now */
3572         if (n_vifs > 1)
3573                 return -EOPNOTSUPP;
3574
3575         switch (mode) {
3576         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3577                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3578                 break;
3579         case CHANCTX_SWMODE_REASSIGN_VIF:
3580                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3581                 break;
3582         default:
3583                 ret = -EOPNOTSUPP;
3584                 break;
3585         }
3586
3587         return ret;
3588 }
3589
3590 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3591                            struct ieee80211_sta *sta,
3592                            bool set)
3593 {
3594         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3595         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3596
3597         if (!mvm_sta || !mvm_sta->vif) {
3598                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3599                 return -EINVAL;
3600         }
3601
3602         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3603 }
3604
3605 #ifdef CONFIG_NL80211_TESTMODE
3606 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3607         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3608         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3609         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3610 };
3611
3612 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3613                                       struct ieee80211_vif *vif,
3614                                       void *data, int len)
3615 {
3616         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3617         int err;
3618         u32 noa_duration;
3619
3620         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3621         if (err)
3622                 return err;
3623
3624         if (!tb[IWL_MVM_TM_ATTR_CMD])
3625                 return -EINVAL;
3626
3627         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3628         case IWL_MVM_TM_CMD_SET_NOA:
3629                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3630                     !vif->bss_conf.enable_beacon ||
3631                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3632                         return -EINVAL;
3633
3634                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3635                 if (noa_duration >= vif->bss_conf.beacon_int)
3636                         return -EINVAL;
3637
3638                 mvm->noa_duration = noa_duration;
3639                 mvm->noa_vif = vif;
3640
3641                 return iwl_mvm_update_quotas(mvm, false, NULL);
3642         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3643                 /* must be associated client vif - ignore authorized */
3644                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3645                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3646                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3647                         return -EINVAL;
3648
3649                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3650                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3651                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3652         }
3653
3654         return -EOPNOTSUPP;
3655 }
3656
3657 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3658                                     struct ieee80211_vif *vif,
3659                                     void *data, int len)
3660 {
3661         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3662         int err;
3663
3664         mutex_lock(&mvm->mutex);
3665         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3666         mutex_unlock(&mvm->mutex);
3667
3668         return err;
3669 }
3670 #endif
3671
3672 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3673                                    struct ieee80211_vif *vif,
3674                                    struct ieee80211_channel_switch *chsw)
3675 {
3676         /* By implementing this operation, we prevent mac80211 from
3677          * starting its own channel switch timer, so that we can call
3678          * ieee80211_chswitch_done() ourselves at the right time
3679          * (which is when the absence time event starts).
3680          */
3681
3682         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3683                            "dummy channel switch op\n");
3684 }
3685
3686 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3687                                       struct ieee80211_vif *vif,
3688                                       struct ieee80211_channel_switch *chsw)
3689 {
3690         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3691         struct ieee80211_vif *csa_vif;
3692         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3693         u32 apply_time;
3694         int ret;
3695
3696         mutex_lock(&mvm->mutex);
3697
3698         mvmvif->csa_failed = false;
3699
3700         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3701                            chsw->chandef.center_freq1);
3702
3703         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3704
3705         switch (vif->type) {
3706         case NL80211_IFTYPE_AP:
3707                 csa_vif =
3708                         rcu_dereference_protected(mvm->csa_vif,
3709                                                   lockdep_is_held(&mvm->mutex));
3710                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3711                               "Another CSA is already in progress")) {
3712                         ret = -EBUSY;
3713                         goto out_unlock;
3714                 }
3715
3716                 /* we still didn't unblock tx. prevent new CS meanwhile */
3717                 if (rcu_dereference_protected(mvm->csa_tx_blocked_vif,
3718                                               lockdep_is_held(&mvm->mutex))) {
3719                         ret = -EBUSY;
3720                         goto out_unlock;
3721                 }
3722
3723                 rcu_assign_pointer(mvm->csa_vif, vif);
3724
3725                 if (WARN_ONCE(mvmvif->csa_countdown,
3726                               "Previous CSA countdown didn't complete")) {
3727                         ret = -EBUSY;
3728                         goto out_unlock;
3729                 }
3730
3731                 mvmvif->csa_target_freq = chsw->chandef.chan->center_freq;
3732
3733                 break;
3734         case NL80211_IFTYPE_STATION:
3735                 if (mvmvif->lqm_active)
3736                         iwl_mvm_send_lqm_cmd(vif,
3737                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3738                                              0, 0);
3739
3740                 /* Schedule the time event to a bit before beacon 1,
3741                  * to make sure we're in the new channel when the
3742                  * GO/AP arrives.
3743                  */
3744                 apply_time = chsw->device_timestamp +
3745                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3746                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3747
3748                 if (chsw->block_tx)
3749                         iwl_mvm_csa_client_absent(mvm, vif);
3750
3751                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3752                                             apply_time);
3753                 if (mvmvif->bf_data.bf_enabled) {
3754                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3755                         if (ret)
3756                                 goto out_unlock;
3757                 }
3758
3759                 break;
3760         default:
3761                 break;
3762         }
3763
3764         mvmvif->ps_disabled = true;
3765
3766         ret = iwl_mvm_power_update_ps(mvm);
3767         if (ret)
3768                 goto out_unlock;
3769
3770         /* we won't be on this channel any longer */
3771         iwl_mvm_teardown_tdls_peers(mvm);
3772
3773 out_unlock:
3774         mutex_unlock(&mvm->mutex);
3775
3776         return ret;
3777 }
3778
3779 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3780                                        struct ieee80211_vif *vif)
3781 {
3782         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3783         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3784         int ret;
3785
3786         mutex_lock(&mvm->mutex);
3787
3788         if (mvmvif->csa_failed) {
3789                 mvmvif->csa_failed = false;
3790                 ret = -EIO;
3791                 goto out_unlock;
3792         }
3793
3794         if (vif->type == NL80211_IFTYPE_STATION) {
3795                 struct iwl_mvm_sta *mvmsta;
3796
3797                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3798                                                           mvmvif->ap_sta_id);
3799
3800                 if (WARN_ON(!mvmsta)) {
3801                         ret = -EIO;
3802                         goto out_unlock;
3803                 }
3804
3805                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3806
3807                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3808
3809                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3810                 if (ret)
3811                         goto out_unlock;
3812
3813                 iwl_mvm_stop_session_protection(mvm, vif);
3814         }
3815
3816         mvmvif->ps_disabled = false;
3817
3818         ret = iwl_mvm_power_update_ps(mvm);
3819
3820 out_unlock:
3821         mutex_unlock(&mvm->mutex);
3822
3823         return ret;
3824 }
3825
3826 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3827                               struct ieee80211_vif *vif, u32 queues, bool drop)
3828 {
3829         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3830         struct iwl_mvm_vif *mvmvif;
3831         struct iwl_mvm_sta *mvmsta;
3832         struct ieee80211_sta *sta;
3833         int i;
3834         u32 msk = 0;
3835
3836         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3837                 return;
3838
3839         /* Make sure we're done with the deferred traffic before flushing */
3840         if (iwl_mvm_is_dqa_supported(mvm))
3841                 flush_work(&mvm->add_stream_wk);
3842
3843         mutex_lock(&mvm->mutex);
3844         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3845
3846         /* flush the AP-station and all TDLS peers */
3847         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3848                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3849                                                 lockdep_is_held(&mvm->mutex));
3850                 if (IS_ERR_OR_NULL(sta))
3851                         continue;
3852
3853                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3854                 if (mvmsta->vif != vif)
3855                         continue;
3856
3857                 /* make sure only TDLS peers or the AP are flushed */
3858                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3859
3860                 msk |= mvmsta->tfd_queue_msk;
3861         }
3862
3863         if (drop) {
3864                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3865                         IWL_ERR(mvm, "flush request fail\n");
3866                 mutex_unlock(&mvm->mutex);
3867         } else {
3868                 mutex_unlock(&mvm->mutex);
3869
3870                 /* this can take a while, and we may need/want other operations
3871                  * to succeed while doing this, so do it without the mutex held
3872                  */
3873                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3874         }
3875 }
3876
3877 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3878                                   struct survey_info *survey)
3879 {
3880         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3881         int ret;
3882
3883         memset(survey, 0, sizeof(*survey));
3884
3885         /* only support global statistics right now */
3886         if (idx != 0)
3887                 return -ENOENT;
3888
3889         if (!fw_has_capa(&mvm->fw->ucode_capa,
3890                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3891                 return -ENOENT;
3892
3893         mutex_lock(&mvm->mutex);
3894
3895         if (mvm->ucode_loaded) {
3896                 ret = iwl_mvm_request_statistics(mvm, false);
3897                 if (ret)
3898                         goto out;
3899         }
3900
3901         survey->filled = SURVEY_INFO_TIME |
3902                          SURVEY_INFO_TIME_RX |
3903                          SURVEY_INFO_TIME_TX |
3904                          SURVEY_INFO_TIME_SCAN;
3905         survey->time = mvm->accu_radio_stats.on_time_rf +
3906                        mvm->radio_stats.on_time_rf;
3907         do_div(survey->time, USEC_PER_MSEC);
3908
3909         survey->time_rx = mvm->accu_radio_stats.rx_time +
3910                           mvm->radio_stats.rx_time;
3911         do_div(survey->time_rx, USEC_PER_MSEC);
3912
3913         survey->time_tx = mvm->accu_radio_stats.tx_time +
3914                           mvm->radio_stats.tx_time;
3915         do_div(survey->time_tx, USEC_PER_MSEC);
3916
3917         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3918                             mvm->radio_stats.on_time_scan;
3919         do_div(survey->time_scan, USEC_PER_MSEC);
3920
3921         ret = 0;
3922  out:
3923         mutex_unlock(&mvm->mutex);
3924         return ret;
3925 }
3926
3927 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3928                                        struct ieee80211_vif *vif,
3929                                        struct ieee80211_sta *sta,
3930                                        struct station_info *sinfo)
3931 {
3932         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3933         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3934         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3935
3936         if (mvmsta->avg_energy) {
3937                 sinfo->signal_avg = mvmsta->avg_energy;
3938                 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
3939         }
3940
3941         if (!fw_has_capa(&mvm->fw->ucode_capa,
3942                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3943                 return;
3944
3945         /* if beacon filtering isn't on mac80211 does it anyway */
3946         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3947                 return;
3948
3949         if (!vif->bss_conf.assoc)
3950                 return;
3951
3952         mutex_lock(&mvm->mutex);
3953
3954         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3955                 goto unlock;
3956
3957         if (iwl_mvm_request_statistics(mvm, false))
3958                 goto unlock;
3959
3960         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3961                            mvmvif->beacon_stats.accu_num_beacons;
3962         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3963         if (mvmvif->beacon_stats.avg_signal) {
3964                 /* firmware only reports a value after RXing a few beacons */
3965                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3966                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3967         }
3968  unlock:
3969         mutex_unlock(&mvm->mutex);
3970 }
3971
3972 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
3973                                         struct ieee80211_vif *vif,
3974                                         const struct ieee80211_event *event)
3975 {
3976 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3977         do {                                                    \
3978                 if ((_cnt) && --(_cnt))                         \
3979                         break;                                  \
3980                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3981         } while (0)
3982
3983         struct iwl_fw_dbg_trigger_tlv *trig;
3984         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3985
3986         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3987                 return;
3988
3989         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3990         trig_mlme = (void *)trig->data;
3991         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3992                 return;
3993
3994         if (event->u.mlme.data == ASSOC_EVENT) {
3995                 if (event->u.mlme.status == MLME_DENIED)
3996                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3997                                            trig_mlme->stop_assoc_denied,
3998                                            "DENIED ASSOC: reason %d",
3999                                             event->u.mlme.reason);
4000                 else if (event->u.mlme.status == MLME_TIMEOUT)
4001                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4002                                            trig_mlme->stop_assoc_timeout,
4003                                            "ASSOC TIMEOUT");
4004         } else if (event->u.mlme.data == AUTH_EVENT) {
4005                 if (event->u.mlme.status == MLME_DENIED)
4006                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4007                                            trig_mlme->stop_auth_denied,
4008                                            "DENIED AUTH: reason %d",
4009                                            event->u.mlme.reason);
4010                 else if (event->u.mlme.status == MLME_TIMEOUT)
4011                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4012                                            trig_mlme->stop_auth_timeout,
4013                                            "AUTH TIMEOUT");
4014         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4015                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4016                                    trig_mlme->stop_rx_deauth,
4017                                    "DEAUTH RX %d", event->u.mlme.reason);
4018         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4019                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4020                                    trig_mlme->stop_tx_deauth,
4021                                    "DEAUTH TX %d", event->u.mlme.reason);
4022         }
4023 #undef CHECK_MLME_TRIGGER
4024 }
4025
4026 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4027                                           struct ieee80211_vif *vif,
4028                                           const struct ieee80211_event *event)
4029 {
4030         struct iwl_fw_dbg_trigger_tlv *trig;
4031         struct iwl_fw_dbg_trigger_ba *ba_trig;
4032
4033         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4034                 return;
4035
4036         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4037         ba_trig = (void *)trig->data;
4038         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4039                 return;
4040
4041         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4042                 return;
4043
4044         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4045                                     "BAR received from %pM, tid %d, ssn %d",
4046                                     event->u.ba.sta->addr, event->u.ba.tid,
4047                                     event->u.ba.ssn);
4048 }
4049
4050 static void
4051 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4052                                      struct ieee80211_vif *vif,
4053                                      const struct ieee80211_event *event)
4054 {
4055         struct iwl_fw_dbg_trigger_tlv *trig;
4056         struct iwl_fw_dbg_trigger_ba *ba_trig;
4057
4058         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4059                 return;
4060
4061         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4062         ba_trig = (void *)trig->data;
4063         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4064                 return;
4065
4066         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4067                 return;
4068
4069         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4070                                     "Frame from %pM timed out, tid %d",
4071                                     event->u.ba.sta->addr, event->u.ba.tid);
4072 }
4073
4074 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4075                                        struct ieee80211_vif *vif,
4076                                        const struct ieee80211_event *event)
4077 {
4078         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4079
4080         switch (event->type) {
4081         case MLME_EVENT:
4082                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4083                 break;
4084         case BAR_RX_EVENT:
4085                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4086                 break;
4087         case BA_FRAME_TIMEOUT:
4088                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4089                 break;
4090         default:
4091                 break;
4092         }
4093 }
4094
4095 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4096                                      struct iwl_mvm_internal_rxq_notif *notif,
4097                                      u32 size)
4098 {
4099         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(notif_waitq);
4100         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4101         int ret;
4102
4103         lockdep_assert_held(&mvm->mutex);
4104
4105         if (!iwl_mvm_has_new_rx_api(mvm))
4106                 return;
4107
4108         notif->cookie = mvm->queue_sync_cookie;
4109
4110         if (notif->sync)
4111                 atomic_set(&mvm->queue_sync_counter,
4112                            mvm->trans->num_rx_queues);
4113
4114         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4115         if (ret) {
4116                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4117                 goto out;
4118         }
4119
4120         if (notif->sync)
4121                 ret = wait_event_timeout(notif_waitq,
4122                                          atomic_read(&mvm->queue_sync_counter) == 0,
4123                                          HZ);
4124         WARN_ON_ONCE(!ret);
4125
4126 out:
4127         atomic_set(&mvm->queue_sync_counter, 0);
4128         mvm->queue_sync_cookie++;
4129 }
4130
4131 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4132 {
4133         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4134         struct iwl_mvm_internal_rxq_notif data = {
4135                 .type = IWL_MVM_RXQ_EMPTY,
4136                 .sync = 1,
4137         };
4138
4139         mutex_lock(&mvm->mutex);
4140         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4141         mutex_unlock(&mvm->mutex);
4142 }
4143
4144 const struct ieee80211_ops iwl_mvm_hw_ops = {
4145         .tx = iwl_mvm_mac_tx,
4146         .ampdu_action = iwl_mvm_mac_ampdu_action,
4147         .start = iwl_mvm_mac_start,
4148         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4149         .stop = iwl_mvm_mac_stop,
4150         .add_interface = iwl_mvm_mac_add_interface,
4151         .remove_interface = iwl_mvm_mac_remove_interface,
4152         .config = iwl_mvm_mac_config,
4153         .prepare_multicast = iwl_mvm_prepare_multicast,
4154         .configure_filter = iwl_mvm_configure_filter,
4155         .config_iface_filter = iwl_mvm_config_iface_filter,
4156         .bss_info_changed = iwl_mvm_bss_info_changed,
4157         .hw_scan = iwl_mvm_mac_hw_scan,
4158         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4159         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4160         .sta_state = iwl_mvm_mac_sta_state,
4161         .sta_notify = iwl_mvm_mac_sta_notify,
4162         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4163         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4164         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4165         .sta_rc_update = iwl_mvm_sta_rc_update,
4166         .conf_tx = iwl_mvm_mac_conf_tx,
4167         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4168         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4169         .flush = iwl_mvm_mac_flush,
4170         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4171         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4172         .set_key = iwl_mvm_mac_set_key,
4173         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4174         .remain_on_channel = iwl_mvm_roc,
4175         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4176         .add_chanctx = iwl_mvm_add_chanctx,
4177         .remove_chanctx = iwl_mvm_remove_chanctx,
4178         .change_chanctx = iwl_mvm_change_chanctx,
4179         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4180         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4181         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4182
4183         .start_ap = iwl_mvm_start_ap_ibss,
4184         .stop_ap = iwl_mvm_stop_ap_ibss,
4185         .join_ibss = iwl_mvm_start_ap_ibss,
4186         .leave_ibss = iwl_mvm_stop_ap_ibss,
4187
4188         .set_tim = iwl_mvm_set_tim,
4189
4190         .channel_switch = iwl_mvm_channel_switch,
4191         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4192         .post_channel_switch = iwl_mvm_post_channel_switch,
4193
4194         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4195         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4196         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4197
4198         .event_callback = iwl_mvm_mac_event_callback,
4199
4200         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4201
4202         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4203
4204 #ifdef CONFIG_PM_SLEEP
4205         /* look at d3.c */
4206         .suspend = iwl_mvm_suspend,
4207         .resume = iwl_mvm_resume,
4208         .set_wakeup = iwl_mvm_set_wakeup,
4209         .set_rekey_data = iwl_mvm_set_rekey_data,
4210 #if IS_ENABLED(CONFIG_IPV6)
4211         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4212 #endif
4213         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4214 #endif
4215         .get_survey = iwl_mvm_mac_get_survey,
4216         .sta_statistics = iwl_mvm_mac_sta_statistics,
4217 };