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         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_STA_PM_NOTIF))
 449                 ieee80211_hw_set(hw, AP_LINK_PS);
 450
 451         if (mvm->trans->num_rx_queues > 1)
 452                 ieee80211_hw_set(hw, USES_RSS);
 453
 454         if (mvm->trans->max_skb_frags)
 455                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 456
 457         if (!iwl_mvm_is_dqa_supported(mvm))
 458                 hw->queues = mvm->first_agg_queue;
 459         else
 460                 hw->queues = IEEE80211_MAX_QUEUES;
 461         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 462         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 463                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 464         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 465                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 466         hw->rate_control_algorithm = "iwl-mvm-rs";
 467         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 468         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 469
 470         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 6);
 471         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 472         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 473         hw->wiphy->cipher_suites = mvm->ciphers;
 474
 475         if (iwl_mvm_has_new_rx_api(mvm)) {
 476                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 477                         WLAN_CIPHER_SUITE_GCMP;
 478                 hw->wiphy->n_cipher_suites++;
 479                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 480                         WLAN_CIPHER_SUITE_GCMP_256;
 481                 hw->wiphy->n_cipher_suites++;
 482         }
 483
 484         /* Enable 11w if software crypto is not enabled (as the
 485          * firmware will interpret some mgmt packets, so enabling it
 486          * with software crypto isn't safe).
 487          */
 488         if (!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                 if (iwl_mvm_has_new_rx_api(mvm)) {
 494                         mvm->ciphers[hw->wiphy->n_cipher_suites] =
 495                                 WLAN_CIPHER_SUITE_BIP_GMAC_128;
 496                         hw->wiphy->n_cipher_suites++;
 497                         mvm->ciphers[hw->wiphy->n_cipher_suites] =
 498                                 WLAN_CIPHER_SUITE_BIP_GMAC_256;
 499                         hw->wiphy->n_cipher_suites++;
 500                 }
 501         }
 502
 503         /* currently FW API supports only one optional cipher scheme */
 504         if (mvm->fw->cs[0].cipher) {
 505                 const struct iwl_fw_cipher_scheme *fwcs = &mvm->fw->cs[0];
 506                 struct ieee80211_cipher_scheme *cs = &mvm->cs[0];
 507
 508                 mvm->hw->n_cipher_schemes = 1;
 509
 510                 cs->cipher = le32_to_cpu(fwcs->cipher);
 511                 cs->iftype = BIT(NL80211_IFTYPE_STATION);
 512                 cs->hdr_len = fwcs->hdr_len;
 513                 cs->pn_len = fwcs->pn_len;
 514                 cs->pn_off = fwcs->pn_off;
 515                 cs->key_idx_off = fwcs->key_idx_off;
 516                 cs->key_idx_mask = fwcs->key_idx_mask;
 517                 cs->key_idx_shift = fwcs->key_idx_shift;
 518                 cs->mic_len = fwcs->mic_len;
 519
 520                 mvm->hw->cipher_schemes = mvm->cs;
 521                 mvm->ciphers[hw->wiphy->n_cipher_suites] = cs->cipher;
 522                 hw->wiphy->n_cipher_suites++;
 523         }
 524
 525         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 526         hw->wiphy->features |=
 527                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 528                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 529                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 530
 531         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 532         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 533         hw->chanctx_data_size = sizeof(u16);
 534
 535         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 536                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 537                 BIT(NL80211_IFTYPE_AP) |
 538                 BIT(NL80211_IFTYPE_P2P_GO) |
 539                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 540                 BIT(NL80211_IFTYPE_ADHOC);
 541
 542         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 543         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 544         if (iwl_mvm_is_lar_supported(mvm))
 545                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 546         else
 547                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 548                                                REGULATORY_DISABLE_BEACON_HINTS;
 549
 550         hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 551         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 552
 553         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 554         hw->wiphy->n_iface_combinations =
 555                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 556
 557         hw->wiphy->max_remain_on_channel_duration = 10000;
 558         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 559         /* we can compensate an offset of up to 3 channels = 15 MHz */
 560         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 561
 562         /* Extract MAC address */
 563         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 564         hw->wiphy->addresses = mvm->addresses;
 565         hw->wiphy->n_addresses = 1;
 566
 567         /* Extract additional MAC addresses if available */
 568         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 569                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 570
 571         for (i = 1; i < num_mac; i++) {
 572                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 573                        ETH_ALEN);
 574                 mvm->addresses[i].addr[5]++;
 575                 hw->wiphy->n_addresses++;
 576         }
 577
 578         iwl_mvm_reset_phy_ctxts(mvm);
 579
 580         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 581
 582         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 583
 584         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 585         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 586                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 587
 588         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 589                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 590         else
 591                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 592
 593         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 594                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 595                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 596         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 597                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 598                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 599
 600                 if (fw_has_capa(&mvm->fw->ucode_capa,
 601                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 602                     fw_has_api(&mvm->fw->ucode_capa,
 603                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 604                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 605                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 606         }
 607
 608         hw->wiphy->hw_version = mvm->trans->hw_id;
 609
 610         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 611                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 612         else
 613                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 614
 615         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 616         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 617         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 618         /* we create the 802.11 header and zero length SSID IE. */
 619         hw->wiphy->max_sched_scan_ie_len =
 620                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 621         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 622         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 623
 624         /*
 625          * the firmware uses u8 for num of iterations, but 0xff is saved for
 626          * infinite loop, so the maximum number of iterations is actually 254.
 627          */
 628         hw->wiphy->max_sched_scan_plan_iterations = 254;
 629
 630         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 631                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 632                                NL80211_FEATURE_P2P_GO_OPPPS |
 633                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
 634                                NL80211_FEATURE_DYNAMIC_SMPS |
 635                                NL80211_FEATURE_STATIC_SMPS |
 636                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 637
 638         if (fw_has_capa(&mvm->fw->ucode_capa,
 639                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 640                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 641         if (fw_has_capa(&mvm->fw->ucode_capa,
 642                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 643                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 644
 645         if (fw_has_capa(&mvm->fw->ucode_capa,
 646                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 647                 hw->wiphy->features |=
 648                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 649
 650         if (fw_has_capa(&mvm->fw->ucode_capa,
 651                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 652                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 653
 654         if (fw_has_api(&mvm->fw->ucode_capa,
 655                        IWL_UCODE_TLV_API_SCAN_TSF_REPORT)) {
 656                 wiphy_ext_feature_set(hw->wiphy,
 657                                       NL80211_EXT_FEATURE_SCAN_START_TIME);
 658                 wiphy_ext_feature_set(hw->wiphy,
 659                                       NL80211_EXT_FEATURE_BSS_PARENT_TSF);
 660                 wiphy_ext_feature_set(hw->wiphy,
 661                                       NL80211_EXT_FEATURE_SET_SCAN_DWELL);
 662         }
 663
 664         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 665
 666 #ifdef CONFIG_PM_SLEEP
 667         if (iwl_mvm_is_d0i3_supported(mvm) &&
 668             device_can_wakeup(mvm->trans->dev)) {
 669                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 670                 hw->wiphy->wowlan = &mvm->wowlan;
 671         }
 672
 673         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 674             mvm->trans->ops->d3_suspend &&
 675             mvm->trans->ops->d3_resume &&
 676             device_can_wakeup(mvm->trans->dev)) {
 677                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 678                                      WIPHY_WOWLAN_DISCONNECT |
 679                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 680                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 681                                      WIPHY_WOWLAN_NET_DETECT;
 682                 if (!iwlwifi_mod_params.sw_crypto)
 683                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 684                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 685                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 686
 687                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 688                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 689                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 690                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 691                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 692                 hw->wiphy->wowlan = &mvm->wowlan;
 693         }
 694 #endif
 695
 696 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 697         /* assign default bcast filtering configuration */
 698         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 699 #endif
 700
 701         ret = iwl_mvm_leds_init(mvm);
 702         if (ret)
 703                 return ret;
 704
 705         if (fw_has_capa(&mvm->fw->ucode_capa,
 706                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 707                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 708                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 709                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 710         }
 711
 712         if (fw_has_capa(&mvm->fw->ucode_capa,
 713                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 714                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 715                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 716         }
 717
 718         hw->netdev_features |= mvm->cfg->features;
 719         if (!iwl_mvm_is_csum_supported(mvm)) {
 720                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 721                                          NETIF_F_RXCSUM);
 722                 /* We may support SW TX CSUM */
 723                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 724                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 725         }
 726
 727         ret = ieee80211_register_hw(mvm->hw);
 728         if (ret)
 729                 iwl_mvm_leds_exit(mvm);
 730
 731         if (mvm->cfg->vht_mu_mimo_supported)
 732                 wiphy_ext_feature_set(hw->wiphy,
 733                                       NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER);
 734
 735         return ret;
 736 }
 737
 738 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 739                              struct ieee80211_sta *sta,
 740                              struct sk_buff *skb)
 741 {
 742         struct iwl_mvm_sta *mvmsta;
 743         bool defer = false;
 744
 745         /*
 746          * double check the IN_D0I3 flag both before and after
 747          * taking the spinlock, in order to prevent taking
 748          * the spinlock when not needed.
 749          */
 750         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 751                 return false;
 752
 753         spin_lock(&mvm->d0i3_tx_lock);
 754         /*
 755          * testing the flag again ensures the skb dequeue
 756          * loop (on d0i3 exit) hasn't run yet.
 757          */
 758         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 759                 goto out;
 760
 761         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 762         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 763             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 764                 goto out;
 765
 766         __skb_queue_tail(&mvm->d0i3_tx, skb);
 767         ieee80211_stop_queues(mvm->hw);
 768
 769         /* trigger wakeup */
 770         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 771         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 772
 773         defer = true;
 774 out:
 775         spin_unlock(&mvm->d0i3_tx_lock);
 776         return defer;
 777 }
 778
 779 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 780                            struct ieee80211_tx_control *control,
 781                            struct sk_buff *skb)
 782 {
 783         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 784         struct ieee80211_sta *sta = control->sta;
 785         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 786         struct ieee80211_hdr *hdr = (void *)skb->data;
 787
 788         if (iwl_mvm_is_radio_killed(mvm)) {
 789                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 790                 goto drop;
 791         }
 792
 793         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 794             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 795             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 796                 goto drop;
 797
 798         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 799         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 800                      ieee80211_is_mgmt(hdr->frame_control) &&
 801                      !ieee80211_is_deauth(hdr->frame_control) &&
 802                      !ieee80211_is_disassoc(hdr->frame_control) &&
 803                      !ieee80211_is_action(hdr->frame_control)))
 804                 sta = NULL;
 805
 806         if (sta) {
 807                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 808                         return;
 809                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 810                         goto drop;
 811                 return;
 812         }
 813
 814         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 815                 goto drop;
 816         return;
 817  drop:
 818         ieee80211_free_txskb(hw, skb);
 819 }
 820
 821 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 822 {
 823         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 824                 return false;
 825         return true;
 826 }
 827
 828 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 829 {
 830         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 831                 return false;
 832         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 833                 return true;
 834
 835         /* enabled by default */
 836         return true;
 837 }
 838
 839 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 840         do {                                                    \
 841                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 842                         break;                                  \
 843                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 844         } while (0)
 845
 846 static void
 847 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 848                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 849                             enum ieee80211_ampdu_mlme_action action)
 850 {
 851         struct iwl_fw_dbg_trigger_tlv *trig;
 852         struct iwl_fw_dbg_trigger_ba *ba_trig;
 853
 854         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 855                 return;
 856
 857         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 858         ba_trig = (void *)trig->data;
 859
 860         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 861                 return;
 862
 863         switch (action) {
 864         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 865                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 866                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 867
 868                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 869                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 870                                  sta->addr, tid, tid_data->ssn);
 871                 break;
 872                 }
 873         case IEEE80211_AMPDU_TX_STOP_CONT:
 874                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 875                                  "TX AGG STOP: MAC %pM tid %d\n",
 876                                  sta->addr, tid);
 877                 break;
 878         case IEEE80211_AMPDU_RX_START:
 879                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 880                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 881                                  sta->addr, tid, rx_ba_ssn);
 882                 break;
 883         case IEEE80211_AMPDU_RX_STOP:
 884                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 885                                  "RX AGG STOP: MAC %pM tid %d\n",
 886                                  sta->addr, tid);
 887                 break;
 888         default:
 889                 break;
 890         }
 891 }
 892
 893 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 894                                     struct ieee80211_vif *vif,
 895                                     struct ieee80211_ampdu_params *params)
 896 {
 897         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 898         int ret;
 899         bool tx_agg_ref = false;
 900         struct ieee80211_sta *sta = params->sta;
 901         enum ieee80211_ampdu_mlme_action action = params->action;
 902         u16 tid = params->tid;
 903         u16 *ssn = &params->ssn;
 904         u8 buf_size = params->buf_size;
 905         bool amsdu = params->amsdu;
 906         u16 timeout = params->timeout;
 907
 908         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 909                      sta->addr, tid, action);
 910
 911         if (!(mvm->nvm_data->sku_cap_11n_enable))
 912                 return -EACCES;
 913
 914         /* return from D0i3 before starting a new Tx aggregation */
 915         switch (action) {
 916         case IEEE80211_AMPDU_TX_START:
 917         case IEEE80211_AMPDU_TX_STOP_CONT:
 918         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 919         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 920         case IEEE80211_AMPDU_TX_OPERATIONAL:
 921                 /*
 922                  * for tx start, wait synchronously until D0i3 exit to
 923                  * get the correct sequence number for the tid.
 924                  * additionally, some other ampdu actions use direct
 925                  * target access, which is not handled automatically
 926                  * by the trans layer (unlike commands), so wait for
 927                  * d0i3 exit in these cases as well.
 928                  */
 929                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 930                 if (ret)
 931                         return ret;
 932
 933                 tx_agg_ref = true;
 934                 break;
 935         default:
 936                 break;
 937         }
 938
 939         mutex_lock(&mvm->mutex);
 940
 941         switch (action) {
 942         case IEEE80211_AMPDU_RX_START:
 943                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 944                         ret = -EINVAL;
 945                         break;
 946                 }
 947                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 948                                          timeout);
 949                 break;
 950         case IEEE80211_AMPDU_RX_STOP:
 951                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 952                                          timeout);
 953                 break;
 954         case IEEE80211_AMPDU_TX_START:
 955                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 956                         ret = -EINVAL;
 957                         break;
 958                 }
 959                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 960                 break;
 961         case IEEE80211_AMPDU_TX_STOP_CONT:
 962                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 963                 break;
 964         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 965         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 966                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 967                 break;
 968         case IEEE80211_AMPDU_TX_OPERATIONAL:
 969                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 970                                               buf_size, amsdu);
 971                 break;
 972         default:
 973                 WARN_ON_ONCE(1);
 974                 ret = -EINVAL;
 975                 break;
 976         }
 977
 978         if (!ret) {
 979                 u16 rx_ba_ssn = 0;
 980
 981                 if (action == IEEE80211_AMPDU_RX_START)
 982                         rx_ba_ssn = *ssn;
 983
 984                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 985                                             rx_ba_ssn, action);
 986         }
 987         mutex_unlock(&mvm->mutex);
 988
 989         /*
 990          * If the tid is marked as started, we won't use it for offloaded
 991          * traffic on the next D0i3 entry. It's safe to unref.
 992          */
 993         if (tx_agg_ref)
 994                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 995
 996         return ret;
 997 }
 998
 999 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
1000                                      struct ieee80211_vif *vif)
1001 {
1002         struct iwl_mvm *mvm = data;
1003         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1004
1005         mvmvif->uploaded = false;
1006         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1007
1008         spin_lock_bh(&mvm->time_event_lock);
1009         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
1010         spin_unlock_bh(&mvm->time_event_lock);
1011
1012         mvmvif->phy_ctxt = NULL;
1013         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
1014 }
1015
1016 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1017 {
1018         /* clear the D3 reconfig, we only need it to avoid dumping a
1019          * firmware coredump on reconfiguration, we shouldn't do that
1020          * on D3->D0 transition
1021          */
1022         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1023                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1024                 iwl_mvm_fw_error_dump(mvm);
1025         }
1026
1027         /* cleanup all stale references (scan, roc), but keep the
1028          * ucode_down ref until reconfig is complete
1029          */
1030         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1031
1032         iwl_mvm_stop_device(mvm);
1033
1034         mvm->scan_status = 0;
1035         mvm->ps_disabled = false;
1036         mvm->calibrating = false;
1037
1038         /* just in case one was running */
1039         iwl_mvm_cleanup_roc_te(mvm);
1040         ieee80211_remain_on_channel_expired(mvm->hw);
1041
1042         /*
1043          * cleanup all interfaces, even inactive ones, as some might have
1044          * gone down during the HW restart
1045          */
1046         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1047
1048         mvm->p2p_device_vif = NULL;
1049         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1050
1051         iwl_mvm_reset_phy_ctxts(mvm);
1052         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1053         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1054         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1055         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1056         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1057         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1058
1059         ieee80211_wake_queues(mvm->hw);
1060
1061         /* clear any stale d0i3 state */
1062         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1063
1064         mvm->vif_count = 0;
1065         mvm->rx_ba_sessions = 0;
1066         mvm->fw_dbg_conf = FW_DBG_INVALID;
1067
1068         /* keep statistics ticking */
1069         iwl_mvm_accu_radio_stats(mvm);
1070 }
1071
1072 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1073 {
1074         int ret;
1075
1076         lockdep_assert_held(&mvm->mutex);
1077
1078         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1079                 /* Clean up some internal and mac80211 state on restart */
1080                 iwl_mvm_restart_cleanup(mvm);
1081         } else {
1082                 /* Hold the reference to prevent runtime suspend while
1083                  * the start procedure runs.  It's a bit confusing
1084                  * that the UCODE_DOWN reference is taken, but it just
1085                  * means "UCODE is not UP yet". ( TODO: rename this
1086                  * reference).
1087                  */
1088                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1089         }
1090         ret = iwl_mvm_up(mvm);
1091
1092         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1093                 /* Something went wrong - we need to finish some cleanup
1094                  * that normally iwl_mvm_mac_restart_complete() below
1095                  * would do.
1096                  */
1097                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1098                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1099         }
1100
1101         return ret;
1102 }
1103
1104 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1105 {
1106         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1107         int ret;
1108
1109         /* Some hw restart cleanups must not hold the mutex */
1110         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1111                 /*
1112                  * Make sure we are out of d0i3. This is needed
1113                  * to make sure the reference accounting is correct
1114                  * (and there is no stale d0i3_exit_work).
1115                  */
1116                 wait_event_timeout(mvm->d0i3_exit_waitq,
1117                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1118                                              &mvm->status),
1119                                    HZ);
1120         }
1121
1122         mutex_lock(&mvm->mutex);
1123         ret = __iwl_mvm_mac_start(mvm);
1124         mutex_unlock(&mvm->mutex);
1125
1126         return ret;
1127 }
1128
1129 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1130 {
1131         int ret;
1132
1133         mutex_lock(&mvm->mutex);
1134
1135         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1136         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1137         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1138         if (ret)
1139                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1140                         ret);
1141
1142         /* allow transport/FW low power modes */
1143         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1144
1145         /*
1146          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1147          * of packets the FW sent out, so we must reconnect.
1148          */
1149         iwl_mvm_teardown_tdls_peers(mvm);
1150
1151         mutex_unlock(&mvm->mutex);
1152 }
1153
1154 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1155 {
1156         if (iwl_mvm_is_d0i3_supported(mvm) &&
1157             iwl_mvm_enter_d0i3_on_suspend(mvm))
1158                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1159                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1160                                                         &mvm->status),
1161                                               HZ),
1162                           "D0i3 exit on resume timed out\n");
1163 }
1164
1165 static void
1166 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1167                               enum ieee80211_reconfig_type reconfig_type)
1168 {
1169         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1170
1171         switch (reconfig_type) {
1172         case IEEE80211_RECONFIG_TYPE_RESTART:
1173                 iwl_mvm_restart_complete(mvm);
1174                 break;
1175         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1176                 iwl_mvm_resume_complete(mvm);
1177                 break;
1178         }
1179 }
1180
1181 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1182 {
1183         lockdep_assert_held(&mvm->mutex);
1184
1185         /* firmware counters are obviously reset now, but we shouldn't
1186          * partially track so also clear the fw_reset_accu counters.
1187          */
1188         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1189
1190         /* async_handlers_wk is now blocked */
1191
1192         /*
1193          * The work item could be running or queued if the
1194          * ROC time event stops just as we get here.
1195          */
1196         flush_work(&mvm->roc_done_wk);
1197
1198         iwl_mvm_stop_device(mvm);
1199
1200         iwl_mvm_async_handlers_purge(mvm);
1201         /* async_handlers_list is empty and will stay empty: HW is stopped */
1202
1203         /* the fw is stopped, the aux sta is dead: clean up driver state */
1204         iwl_mvm_del_aux_sta(mvm);
1205
1206         iwl_free_fw_paging(mvm);
1207
1208         /*
1209          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1210          * won't be called in this case).
1211          * But make sure to cleanup interfaces that have gone down before/during
1212          * HW restart was requested.
1213          */
1214         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1215                 ieee80211_iterate_interfaces(mvm->hw, 0,
1216                                              iwl_mvm_cleanup_iterator, mvm);
1217
1218         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1219          * make sure there's nothing left there and warn if any is found.
1220          */
1221         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1222                 int i;
1223
1224                 for (i = 0; i < mvm->max_scans; i++) {
1225                         if (WARN_ONCE(mvm->scan_uid_status[i],
1226                                       "UMAC scan UID %d status was not cleaned\n",
1227                                       i))
1228                                 mvm->scan_uid_status[i] = 0;
1229                 }
1230         }
1231 }
1232
1233 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1234 {
1235         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1236
1237         flush_work(&mvm->d0i3_exit_work);
1238         flush_work(&mvm->async_handlers_wk);
1239         flush_work(&mvm->add_stream_wk);
1240         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1241         cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork);
1242         cancel_delayed_work_sync(&mvm->scan_timeout_dwork);
1243         iwl_mvm_free_fw_dump_desc(mvm);
1244
1245         mutex_lock(&mvm->mutex);
1246         __iwl_mvm_mac_stop(mvm);
1247         mutex_unlock(&mvm->mutex);
1248
1249         /*
1250          * The worker might have been waiting for the mutex, let it run and
1251          * discover that its list is now empty.
1252          */
1253         cancel_work_sync(&mvm->async_handlers_wk);
1254 }
1255
1256 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1257 {
1258         u16 i;
1259
1260         lockdep_assert_held(&mvm->mutex);
1261
1262         for (i = 0; i < NUM_PHY_CTX; i++)
1263                 if (!mvm->phy_ctxts[i].ref)
1264                         return &mvm->phy_ctxts[i];
1265
1266         IWL_ERR(mvm, "No available PHY context\n");
1267         return NULL;
1268 }
1269
1270 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1271                                 s16 tx_power)
1272 {
1273         struct iwl_dev_tx_power_cmd cmd = {
1274                 .v3.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1275                 .v3.mac_context_id =
1276                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1277                 .v3.pwr_restriction = cpu_to_le16(8 * tx_power),
1278         };
1279         int len = sizeof(cmd);
1280
1281         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1282                 cmd.v3.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1283
1284         if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK))
1285                 len = sizeof(cmd.v3);
1286
1287         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1288 }
1289
1290 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1291                                      struct ieee80211_vif *vif)
1292 {
1293         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1294         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1295         int ret;
1296
1297         mvmvif->mvm = mvm;
1298
1299         /*
1300          * make sure D0i3 exit is completed, otherwise a target access
1301          * during tx queue configuration could be done when still in
1302          * D0i3 state.
1303          */
1304         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1305         if (ret)
1306                 return ret;
1307
1308         /*
1309          * Not much to do here. The stack will not allow interface
1310          * types or combinations that we didn't advertise, so we
1311          * don't really have to check the types.
1312          */
1313
1314         mutex_lock(&mvm->mutex);
1315
1316         /* make sure that beacon statistics don't go backwards with FW reset */
1317         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1318                 mvmvif->beacon_stats.accu_num_beacons +=
1319                         mvmvif->beacon_stats.num_beacons;
1320
1321         /* Allocate resources for the MAC context, and add it to the fw  */
1322         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1323         if (ret)
1324                 goto out_unlock;
1325
1326         /* Counting number of interfaces is needed for legacy PM */
1327         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1328                 mvm->vif_count++;
1329
1330         /*
1331          * The AP binding flow can be done only after the beacon
1332          * template is configured (which happens only in the mac80211
1333          * start_ap() flow), and adding the broadcast station can happen
1334          * only after the binding.
1335          * In addition, since modifying the MAC before adding a bcast
1336          * station is not allowed by the FW, delay the adding of MAC context to
1337          * the point where we can also add the bcast station.
1338          * In short: there's not much we can do at this point, other than
1339          * allocating resources :)
1340          */
1341         if (vif->type == NL80211_IFTYPE_AP ||
1342             vif->type == NL80211_IFTYPE_ADHOC) {
1343                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1344                 if (ret) {
1345                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1346                         goto out_release;
1347                 }
1348
1349                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1350                 goto out_unlock;
1351         }
1352
1353         mvmvif->features |= hw->netdev_features;
1354
1355         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1356         if (ret)
1357                 goto out_release;
1358
1359         ret = iwl_mvm_power_update_mac(mvm);
1360         if (ret)
1361                 goto out_remove_mac;
1362
1363         /* beacon filtering */
1364         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1365         if (ret)
1366                 goto out_remove_mac;
1367
1368         if (!mvm->bf_allowed_vif &&
1369             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1370                 mvm->bf_allowed_vif = mvmvif;
1371                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1372                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1373         }
1374
1375         /*
1376          * P2P_DEVICE interface does not have a channel context assigned to it,
1377          * so a dedicated PHY context is allocated to it and the corresponding
1378          * MAC context is bound to it at this stage.
1379          */
1380         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1381
1382                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1383                 if (!mvmvif->phy_ctxt) {
1384                         ret = -ENOSPC;
1385                         goto out_free_bf;
1386                 }
1387
1388                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1389                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1390                 if (ret)
1391                         goto out_unref_phy;
1392
1393                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1394                 if (ret)
1395                         goto out_unbind;
1396
1397                 /* Save a pointer to p2p device vif, so it can later be used to
1398                  * update the p2p device MAC when a GO is started/stopped */
1399                 mvm->p2p_device_vif = vif;
1400         }
1401
1402         iwl_mvm_vif_dbgfs_register(mvm, vif);
1403         goto out_unlock;
1404
1405  out_unbind:
1406         iwl_mvm_binding_remove_vif(mvm, vif);
1407  out_unref_phy:
1408         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1409  out_free_bf:
1410         if (mvm->bf_allowed_vif == mvmvif) {
1411                 mvm->bf_allowed_vif = NULL;
1412                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1413                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1414         }
1415  out_remove_mac:
1416         mvmvif->phy_ctxt = NULL;
1417         iwl_mvm_mac_ctxt_remove(mvm, vif);
1418  out_release:
1419         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1420                 mvm->vif_count--;
1421
1422         iwl_mvm_mac_ctxt_release(mvm, vif);
1423  out_unlock:
1424         mutex_unlock(&mvm->mutex);
1425
1426         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1427
1428         return ret;
1429 }
1430
1431 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1432                                         struct ieee80211_vif *vif)
1433 {
1434         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1435
1436         if (tfd_msk) {
1437                 /*
1438                  * mac80211 first removes all the stations of the vif and
1439                  * then removes the vif. When it removes a station it also
1440                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1441                  * of all the stations of this vif are closed, and the queues
1442                  * of these AMPDU sessions are properly closed.
1443                  * We still need to take care of the shared queues of the vif.
1444                  * Flush them here.
1445                  */
1446                 mutex_lock(&mvm->mutex);
1447                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1448                 mutex_unlock(&mvm->mutex);
1449
1450                 /*
1451                  * There are transports that buffer a few frames in the host.
1452                  * For these, the flush above isn't enough since while we were
1453                  * flushing, the transport might have sent more frames to the
1454                  * device. To solve this, wait here until the transport is
1455                  * empty. Technically, this could have replaced the flush
1456                  * above, but flush is much faster than draining. So flush
1457                  * first, and drain to make sure we have no frames in the
1458                  * transport anymore.
1459                  * If a station still had frames on the shared queues, it is
1460                  * already marked as draining, so to complete the draining, we
1461                  * just need to wait until the transport is empty.
1462                  */
1463                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1464         }
1465
1466         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1467                 /*
1468                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1469                  * We assume here that all the packets sent to the OFFCHANNEL
1470                  * queue are sent in ROC session.
1471                  */
1472                 flush_work(&mvm->roc_done_wk);
1473         } else {
1474                 /*
1475                  * By now, all the AC queues are empty. The AGG queues are
1476                  * empty too. We already got all the Tx responses for all the
1477                  * packets in the queues. The drain work can have been
1478                  * triggered. Flush it.
1479                  */
1480                 flush_work(&mvm->sta_drained_wk);
1481         }
1482 }
1483
1484 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1485                                          struct ieee80211_vif *vif)
1486 {
1487         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1488         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1489
1490         iwl_mvm_prepare_mac_removal(mvm, vif);
1491
1492         mutex_lock(&mvm->mutex);
1493
1494         if (mvm->bf_allowed_vif == mvmvif) {
1495                 mvm->bf_allowed_vif = NULL;
1496                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1497                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1498         }
1499
1500         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1501
1502         /*
1503          * For AP/GO interface, the tear down of the resources allocated to the
1504          * interface is be handled as part of the stop_ap flow.
1505          */
1506         if (vif->type == NL80211_IFTYPE_AP ||
1507             vif->type == NL80211_IFTYPE_ADHOC) {
1508 #ifdef CONFIG_NL80211_TESTMODE
1509                 if (vif == mvm->noa_vif) {
1510                         mvm->noa_vif = NULL;
1511                         mvm->noa_duration = 0;
1512                 }
1513 #endif
1514                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1515                 goto out_release;
1516         }
1517
1518         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1519                 mvm->p2p_device_vif = NULL;
1520                 iwl_mvm_rm_bcast_sta(mvm, vif);
1521                 iwl_mvm_binding_remove_vif(mvm, vif);
1522                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1523                 mvmvif->phy_ctxt = NULL;
1524         }
1525
1526         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1527                 mvm->vif_count--;
1528
1529         iwl_mvm_power_update_mac(mvm);
1530         iwl_mvm_mac_ctxt_remove(mvm, vif);
1531
1532 out_release:
1533         iwl_mvm_mac_ctxt_release(mvm, vif);
1534         mutex_unlock(&mvm->mutex);
1535 }
1536
1537 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1538 {
1539         return 0;
1540 }
1541
1542 struct iwl_mvm_mc_iter_data {
1543         struct iwl_mvm *mvm;
1544         int port_id;
1545 };
1546
1547 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1548                                       struct ieee80211_vif *vif)
1549 {
1550         struct iwl_mvm_mc_iter_data *data = _data;
1551         struct iwl_mvm *mvm = data->mvm;
1552         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1553         int ret, len;
1554
1555         /* if we don't have free ports, mcast frames will be dropped */
1556         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1557                 return;
1558
1559         if (vif->type != NL80211_IFTYPE_STATION ||
1560             !vif->bss_conf.assoc)
1561                 return;
1562
1563         cmd->port_id = data->port_id++;
1564         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1565         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1566
1567         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1568         if (ret)
1569                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1570 }
1571
1572 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1573 {
1574         struct iwl_mvm_mc_iter_data iter_data = {
1575                 .mvm = mvm,
1576         };
1577
1578         lockdep_assert_held(&mvm->mutex);
1579
1580         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1581                 return;
1582
1583         ieee80211_iterate_active_interfaces_atomic(
1584                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1585                 iwl_mvm_mc_iface_iterator, &iter_data);
1586 }
1587
1588 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1589                                      struct netdev_hw_addr_list *mc_list)
1590 {
1591         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1592         struct iwl_mcast_filter_cmd *cmd;
1593         struct netdev_hw_addr *addr;
1594         int addr_count;
1595         bool pass_all;
1596         int len;
1597
1598         addr_count = netdev_hw_addr_list_count(mc_list);
1599         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1600                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1601         if (pass_all)
1602                 addr_count = 0;
1603
1604         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1605         cmd = kzalloc(len, GFP_ATOMIC);
1606         if (!cmd)
1607                 return 0;
1608
1609         if (pass_all) {
1610                 cmd->pass_all = 1;
1611                 return (u64)(unsigned long)cmd;
1612         }
1613
1614         netdev_hw_addr_list_for_each(addr, mc_list) {
1615                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1616                                    cmd->count, addr->addr);
1617                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1618                        addr->addr, ETH_ALEN);
1619                 cmd->count++;
1620         }
1621
1622         return (u64)(unsigned long)cmd;
1623 }
1624
1625 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1626                                      unsigned int changed_flags,
1627                                      unsigned int *total_flags,
1628                                      u64 multicast)
1629 {
1630         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1631         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1632
1633         mutex_lock(&mvm->mutex);
1634
1635         /* replace previous configuration */
1636         kfree(mvm->mcast_filter_cmd);
1637         mvm->mcast_filter_cmd = cmd;
1638
1639         if (!cmd)
1640                 goto out;
1641
1642         iwl_mvm_recalc_multicast(mvm);
1643 out:
1644         mutex_unlock(&mvm->mutex);
1645         *total_flags = 0;
1646 }
1647
1648 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1649                                         struct ieee80211_vif *vif,
1650                                         unsigned int filter_flags,
1651                                         unsigned int changed_flags)
1652 {
1653         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1654
1655         /* We support only filter for probe requests */
1656         if (!(changed_flags & FIF_PROBE_REQ))
1657                 return;
1658
1659         /* Supported only for p2p client interfaces */
1660         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1661             !vif->p2p)
1662                 return;
1663
1664         mutex_lock(&mvm->mutex);
1665         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1666         mutex_unlock(&mvm->mutex);
1667 }
1668
1669 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1670 struct iwl_bcast_iter_data {
1671         struct iwl_mvm *mvm;
1672         struct iwl_bcast_filter_cmd *cmd;
1673         u8 current_filter;
1674 };
1675
1676 static void
1677 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1678                          const struct iwl_fw_bcast_filter *in_filter,
1679                          struct iwl_fw_bcast_filter *out_filter)
1680 {
1681         struct iwl_fw_bcast_filter_attr *attr;
1682         int i;
1683
1684         memcpy(out_filter, in_filter, sizeof(*out_filter));
1685
1686         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1687                 attr = &out_filter->attrs[i];
1688
1689                 if (!attr->mask)
1690                         break;
1691
1692                 switch (attr->reserved1) {
1693                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1694                         if (vif->bss_conf.arp_addr_cnt != 1) {
1695                                 attr->mask = 0;
1696                                 continue;
1697                         }
1698
1699                         attr->val = vif->bss_conf.arp_addr_list[0];
1700                         break;
1701                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1702                         attr->val = *(__be32 *)&vif->addr[2];
1703                         break;
1704                 default:
1705                         break;
1706                 }
1707                 attr->reserved1 = 0;
1708                 out_filter->num_attrs++;
1709         }
1710 }
1711
1712 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1713                                           struct ieee80211_vif *vif)
1714 {
1715         struct iwl_bcast_iter_data *data = _data;
1716         struct iwl_mvm *mvm = data->mvm;
1717         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1718         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1719         struct iwl_fw_bcast_mac *bcast_mac;
1720         int i;
1721
1722         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1723                 return;
1724
1725         bcast_mac = &cmd->macs[mvmvif->id];
1726
1727         /*
1728          * enable filtering only for associated stations, but not for P2P
1729          * Clients
1730          */
1731         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1732             !vif->bss_conf.assoc)
1733                 return;
1734
1735         bcast_mac->default_discard = 1;
1736
1737         /* copy all configured filters */
1738         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1739                 /*
1740                  * Make sure we don't exceed our filters limit.
1741                  * if there is still a valid filter to be configured,
1742                  * be on the safe side and just allow bcast for this mac.
1743                  */
1744                 if (WARN_ON_ONCE(data->current_filter >=
1745                                  ARRAY_SIZE(cmd->filters))) {
1746                         bcast_mac->default_discard = 0;
1747                         bcast_mac->attached_filters = 0;
1748                         break;
1749                 }
1750
1751                 iwl_mvm_set_bcast_filter(vif,
1752                                          &mvm->bcast_filters[i],
1753                                          &cmd->filters[data->current_filter]);
1754
1755                 /* skip current filter if it contains no attributes */
1756                 if (!cmd->filters[data->current_filter].num_attrs)
1757                         continue;
1758
1759                 /* attach the filter to current mac */
1760                 bcast_mac->attached_filters |=
1761                                 cpu_to_le16(BIT(data->current_filter));
1762
1763                 data->current_filter++;
1764         }
1765 }
1766
1767 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1768                                     struct iwl_bcast_filter_cmd *cmd)
1769 {
1770         struct iwl_bcast_iter_data iter_data = {
1771                 .mvm = mvm,
1772                 .cmd = cmd,
1773         };
1774
1775         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1776                 return false;
1777
1778         memset(cmd, 0, sizeof(*cmd));
1779         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1780         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1781
1782 #ifdef CONFIG_IWLWIFI_DEBUGFS
1783         /* use debugfs filters/macs if override is configured */
1784         if (mvm->dbgfs_bcast_filtering.override) {
1785                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1786                        sizeof(cmd->filters));
1787                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1788                        sizeof(cmd->macs));
1789                 return true;
1790         }
1791 #endif
1792
1793         /* if no filters are configured, do nothing */
1794         if (!mvm->bcast_filters)
1795                 return false;
1796
1797         /* configure and attach these filters for each associated sta vif */
1798         ieee80211_iterate_active_interfaces(
1799                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1800                 iwl_mvm_bcast_filter_iterator, &iter_data);
1801
1802         return true;
1803 }
1804
1805 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1806 {
1807         struct iwl_bcast_filter_cmd cmd;
1808
1809         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1810                 return 0;
1811
1812         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1813                 return 0;
1814
1815         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1816                                     sizeof(cmd), &cmd);
1817 }
1818 #else
1819 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1820 {
1821         return 0;
1822 }
1823 #endif
1824
1825 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1826                                     struct ieee80211_vif *vif)
1827 {
1828         struct iwl_mu_group_mgmt_cmd cmd = {};
1829
1830         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1831                WLAN_MEMBERSHIP_LEN);
1832         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1833                WLAN_USER_POSITION_LEN);
1834
1835         return iwl_mvm_send_cmd_pdu(mvm,
1836                                     WIDE_ID(DATA_PATH_GROUP,
1837                                             UPDATE_MU_GROUPS_CMD),
1838                                     0, sizeof(cmd), &cmd);
1839 }
1840
1841 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1842                                            struct ieee80211_vif *vif)
1843 {
1844         if (vif->mu_mimo_owner) {
1845                 struct iwl_mu_group_mgmt_notif *notif = _data;
1846
1847                 /*
1848                  * MU-MIMO Group Id action frame is little endian. We treat
1849                  * the data received from firmware as if it came from the
1850                  * action frame, so no conversion is needed.
1851                  */
1852                 ieee80211_update_mu_groups(vif,
1853                                            (u8 *)&notif->membership_status,
1854                                            (u8 *)&notif->user_position);
1855         }
1856 }
1857
1858 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1859                                struct iwl_rx_cmd_buffer *rxb)
1860 {
1861         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1862         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1863
1864         ieee80211_iterate_active_interfaces_atomic(
1865                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1866                         iwl_mvm_mu_mimo_iface_iterator, notif);
1867 }
1868
1869 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1870                                              struct ieee80211_vif *vif,
1871                                              struct ieee80211_bss_conf *bss_conf,
1872                                              u32 changes)
1873 {
1874         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1875         int ret;
1876
1877         /*
1878          * Re-calculate the tsf id, as the master-slave relations depend on the
1879          * beacon interval, which was not known when the station interface was
1880          * added.
1881          */
1882         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1883                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1884
1885         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1886             mvmvif->lqm_active)
1887                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1888                                      0, 0);
1889
1890         /*
1891          * If we're not associated yet, take the (new) BSSID before associating
1892          * so the firmware knows. If we're already associated, then use the old
1893          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1894          * branch for disassociation below.
1895          */
1896         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1897                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1898
1899         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1900         if (ret)
1901                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1902
1903         /* after sending it once, adopt mac80211 data */
1904         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1905         mvmvif->associated = bss_conf->assoc;
1906
1907         if (changes & BSS_CHANGED_ASSOC) {
1908                 if (bss_conf->assoc) {
1909                         /* clear statistics to get clean beacon counter */
1910                         iwl_mvm_request_statistics(mvm, true);
1911                         memset(&mvmvif->beacon_stats, 0,
1912                                sizeof(mvmvif->beacon_stats));
1913
1914                         /* add quota for this interface */
1915                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1916                         if (ret) {
1917                                 IWL_ERR(mvm, "failed to update quotas\n");
1918                                 return;
1919                         }
1920
1921                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1922                                      &mvm->status)) {
1923                                 /*
1924                                  * If we're restarting then the firmware will
1925                                  * obviously have lost synchronisation with
1926                                  * the AP. It will attempt to synchronise by
1927                                  * itself, but we can make it more reliable by
1928                                  * scheduling a session protection time event.
1929                                  *
1930                                  * The firmware needs to receive a beacon to
1931                                  * catch up with synchronisation, use 110% of
1932                                  * the beacon interval.
1933                                  *
1934                                  * Set a large maximum delay to allow for more
1935                                  * than a single interface.
1936                                  */
1937                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1938                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1939                                                         5 * dur, false);
1940                         }
1941
1942                         iwl_mvm_sf_update(mvm, vif, false);
1943                         iwl_mvm_power_vif_assoc(mvm, vif);
1944                         if (vif->p2p) {
1945                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1946                                 iwl_mvm_update_smps(mvm, vif,
1947                                                     IWL_MVM_SMPS_REQ_PROT,
1948                                                     IEEE80211_SMPS_DYNAMIC);
1949                         }
1950                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1951                         /*
1952                          * If update fails - SF might be running in associated
1953                          * mode while disassociated - which is forbidden.
1954                          */
1955                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1956                                   "Failed to update SF upon disassociation\n");
1957
1958                         /* remove AP station now that the MAC is unassoc */
1959                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1960                         if (ret)
1961                                 IWL_ERR(mvm, "failed to remove AP station\n");
1962
1963                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1964                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1965                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1966                         /* remove quota for this interface */
1967                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1968                         if (ret)
1969                                 IWL_ERR(mvm, "failed to update quotas\n");
1970
1971                         if (vif->p2p)
1972                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1973
1974                         /* this will take the cleared BSSID from bss_conf */
1975                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1976                         if (ret)
1977                                 IWL_ERR(mvm,
1978                                         "failed to update MAC %pM (clear after unassoc)\n",
1979                                         vif->addr);
1980                 }
1981
1982                 /*
1983                  * The firmware tracks the MU-MIMO group on its own.
1984                  * However, on HW restart we should restore this data.
1985                  */
1986                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1987                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1988                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1989                         if (ret)
1990                                 IWL_ERR(mvm,
1991                                         "failed to update VHT MU_MIMO groups\n");
1992                 }
1993
1994                 iwl_mvm_recalc_multicast(mvm);
1995                 iwl_mvm_configure_bcast_filter(mvm);
1996
1997                 /* reset rssi values */
1998                 mvmvif->bf_data.ave_beacon_signal = 0;
1999
2000                 iwl_mvm_bt_coex_vif_change(mvm);
2001                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2002                                     IEEE80211_SMPS_AUTOMATIC);
2003                 if (fw_has_capa(&mvm->fw->ucode_capa,
2004                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2005                         iwl_mvm_config_scan(mvm);
2006         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2007                 /*
2008                  * We received a beacon _after_ association so
2009                  * remove the session protection.
2010                  */
2011                 iwl_mvm_remove_time_event(mvm, mvmvif,
2012                                           &mvmvif->time_event_data);
2013         }
2014
2015         if (changes & BSS_CHANGED_BEACON_INFO) {
2016                 iwl_mvm_sf_update(mvm, vif, false);
2017                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2018         }
2019
2020         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
2021                        /*
2022                         * Send power command on every beacon change,
2023                         * because we may have not enabled beacon abort yet.
2024                         */
2025                        BSS_CHANGED_BEACON_INFO)) {
2026                 ret = iwl_mvm_power_update_mac(mvm);
2027                 if (ret)
2028                         IWL_ERR(mvm, "failed to update power mode\n");
2029         }
2030
2031         if (changes & BSS_CHANGED_TXPOWER) {
2032                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2033                                 bss_conf->txpower);
2034                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2035         }
2036
2037         if (changes & BSS_CHANGED_CQM) {
2038                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2039                 /* reset cqm events tracking */
2040                 mvmvif->bf_data.last_cqm_event = 0;
2041                 if (mvmvif->bf_data.bf_enabled) {
2042                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2043                         if (ret)
2044                                 IWL_ERR(mvm,
2045                                         "failed to update CQM thresholds\n");
2046                 }
2047         }
2048
2049         if (changes & BSS_CHANGED_ARP_FILTER) {
2050                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2051                 iwl_mvm_configure_bcast_filter(mvm);
2052         }
2053 }
2054
2055 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2056                                  struct ieee80211_vif *vif)
2057 {
2058         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2059         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2060         int ret;
2061
2062         /*
2063          * iwl_mvm_mac_ctxt_add() might read directly from the device
2064          * (the system time), so make sure it is available.
2065          */
2066         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2067         if (ret)
2068                 return ret;
2069
2070         mutex_lock(&mvm->mutex);
2071
2072         /* Send the beacon template */
2073         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2074         if (ret)
2075                 goto out_unlock;
2076
2077         /*
2078          * Re-calculate the tsf id, as the master-slave relations depend on the
2079          * beacon interval, which was not known when the AP interface was added.
2080          */
2081         if (vif->type == NL80211_IFTYPE_AP)
2082                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2083
2084         mvmvif->ap_assoc_sta_count = 0;
2085
2086         /* Add the mac context */
2087         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2088         if (ret)
2089                 goto out_unlock;
2090
2091         /* Perform the binding */
2092         ret = iwl_mvm_binding_add_vif(mvm, vif);
2093         if (ret)
2094                 goto out_remove;
2095
2096         /* Send the bcast station. At this stage the TBTT and DTIM time events
2097          * are added and applied to the scheduler */
2098         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2099         if (ret)
2100                 goto out_unbind;
2101
2102         /* enable the multicast queue, now that we have a station for it */
2103         if (iwl_mvm_is_dqa_supported(mvm)) {
2104                 unsigned int wdg_timeout =
2105                         iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2106                 struct iwl_trans_txq_scd_cfg cfg = {
2107                         .fifo = IWL_MVM_TX_FIFO_MCAST,
2108                         .sta_id = mvmvif->bcast_sta.sta_id,
2109                         .tid = IWL_MAX_TID_COUNT,
2110                         .aggregate = false,
2111                         .frame_limit = IWL_FRAME_LIMIT,
2112                 };
2113
2114                 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2115                                    &cfg, wdg_timeout);
2116         }
2117
2118         /* must be set before quota calculations */
2119         mvmvif->ap_ibss_active = true;
2120
2121         /* power updated needs to be done before quotas */
2122         iwl_mvm_power_update_mac(mvm);
2123
2124         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2125         if (ret)
2126                 goto out_quota_failed;
2127
2128         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2129         if (vif->p2p && mvm->p2p_device_vif)
2130                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2131
2132         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2133
2134         iwl_mvm_bt_coex_vif_change(mvm);
2135
2136         /* we don't support TDLS during DCM */
2137         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2138                 iwl_mvm_teardown_tdls_peers(mvm);
2139
2140         goto out_unlock;
2141
2142 out_quota_failed:
2143         iwl_mvm_power_update_mac(mvm);
2144         mvmvif->ap_ibss_active = false;
2145         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2146 out_unbind:
2147         iwl_mvm_binding_remove_vif(mvm, vif);
2148 out_remove:
2149         iwl_mvm_mac_ctxt_remove(mvm, vif);
2150 out_unlock:
2151         mutex_unlock(&mvm->mutex);
2152         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2153         return ret;
2154 }
2155
2156 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2157                                  struct ieee80211_vif *vif)
2158 {
2159         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2160         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2161
2162         iwl_mvm_prepare_mac_removal(mvm, vif);
2163
2164         mutex_lock(&mvm->mutex);
2165
2166         /* Handle AP stop while in CSA */
2167         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2168                 iwl_mvm_remove_time_event(mvm, mvmvif,
2169                                           &mvmvif->time_event_data);
2170                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2171                 mvmvif->csa_countdown = false;
2172         }
2173
2174         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2175                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2176                 mvm->csa_tx_block_bcn_timeout = 0;
2177         }
2178
2179         mvmvif->ap_ibss_active = false;
2180         mvm->ap_last_beacon_gp2 = 0;
2181
2182         iwl_mvm_bt_coex_vif_change(mvm);
2183
2184         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2185
2186         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2187         if (vif->p2p && mvm->p2p_device_vif)
2188                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2189
2190         iwl_mvm_update_quotas(mvm, false, NULL);
2191         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2192         iwl_mvm_binding_remove_vif(mvm, vif);
2193
2194         iwl_mvm_power_update_mac(mvm);
2195
2196         iwl_mvm_mac_ctxt_remove(mvm, vif);
2197
2198         mutex_unlock(&mvm->mutex);
2199 }
2200
2201 static void
2202 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2203                                  struct ieee80211_vif *vif,
2204                                  struct ieee80211_bss_conf *bss_conf,
2205                                  u32 changes)
2206 {
2207         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2208
2209         /* Changes will be applied when the AP/IBSS is started */
2210         if (!mvmvif->ap_ibss_active)
2211                 return;
2212
2213         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2214                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2215             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2216                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2217
2218         /* Need to send a new beacon template to the FW */
2219         if (changes & BSS_CHANGED_BEACON &&
2220             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2221                 IWL_WARN(mvm, "Failed updating beacon data\n");
2222
2223         if (changes & BSS_CHANGED_TXPOWER) {
2224                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2225                                 bss_conf->txpower);
2226                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2227         }
2228 }
2229
2230 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2231                                      struct ieee80211_vif *vif,
2232                                      struct ieee80211_bss_conf *bss_conf,
2233                                      u32 changes)
2234 {
2235         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2236
2237         /*
2238          * iwl_mvm_bss_info_changed_station() might call
2239          * iwl_mvm_protect_session(), which reads directly from
2240          * the device (the system time), so make sure it is available.
2241          */
2242         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2243                 return;
2244
2245         mutex_lock(&mvm->mutex);
2246
2247         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2248                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2249
2250         switch (vif->type) {
2251         case NL80211_IFTYPE_STATION:
2252                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2253                 break;
2254         case NL80211_IFTYPE_AP:
2255         case NL80211_IFTYPE_ADHOC:
2256                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2257                 break;
2258         case NL80211_IFTYPE_MONITOR:
2259                 if (changes & BSS_CHANGED_MU_GROUPS)
2260                         iwl_mvm_update_mu_groups(mvm, vif);
2261                 break;
2262         default:
2263                 /* shouldn't happen */
2264                 WARN_ON_ONCE(1);
2265         }
2266
2267         mutex_unlock(&mvm->mutex);
2268         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2269 }
2270
2271 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2272                                struct ieee80211_vif *vif,
2273                                struct ieee80211_scan_request *hw_req)
2274 {
2275         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2276         int ret;
2277
2278         if (hw_req->req.n_channels == 0 ||
2279             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2280                 return -EINVAL;
2281
2282         mutex_lock(&mvm->mutex);
2283         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2284         mutex_unlock(&mvm->mutex);
2285
2286         return ret;
2287 }
2288
2289 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2290                                        struct ieee80211_vif *vif)
2291 {
2292         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2293
2294         mutex_lock(&mvm->mutex);
2295
2296         /* Due to a race condition, it's possible that mac80211 asks
2297          * us to stop a hw_scan when it's already stopped.  This can
2298          * happen, for instance, if we stopped the scan ourselves,
2299          * called ieee80211_scan_completed() and the userspace called
2300          * cancel scan scan before ieee80211_scan_work() could run.
2301          * To handle that, simply return if the scan is not running.
2302         */
2303         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2304                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2305
2306         mutex_unlock(&mvm->mutex);
2307 }
2308
2309 static void
2310 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2311                                   struct ieee80211_sta *sta, u16 tids,
2312                                   int num_frames,
2313                                   enum ieee80211_frame_release_type reason,
2314                                   bool more_data)
2315 {
2316         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2317
2318         /* Called when we need to transmit (a) frame(s) from mac80211 */
2319
2320         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2321                                           tids, more_data, false);
2322 }
2323
2324 static void
2325 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2326                                     struct ieee80211_sta *sta, u16 tids,
2327                                     int num_frames,
2328                                     enum ieee80211_frame_release_type reason,
2329                                     bool more_data)
2330 {
2331         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2332
2333         /* Called when we need to transmit (a) frame(s) from agg queue */
2334
2335         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2336                                           tids, more_data, true);
2337 }
2338
2339 static void __iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2340                                      enum sta_notify_cmd cmd,
2341                                      struct ieee80211_sta *sta)
2342 {
2343         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2344         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2345         unsigned long txqs = 0, tids = 0;
2346         int tid;
2347
2348         spin_lock_bh(&mvmsta->lock);
2349         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2350                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2351
2352                 if (tid_data->state != IWL_AGG_ON &&
2353                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2354                         continue;
2355
2356                 __set_bit(tid_data->txq_id, &txqs);
2357
2358                 if (iwl_mvm_tid_queued(tid_data) == 0)
2359                         continue;
2360
2361                 __set_bit(tid, &tids);
2362         }
2363
2364         switch (cmd) {
2365         case STA_NOTIFY_SLEEP:
2366                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2367                         ieee80211_sta_block_awake(hw, sta, true);
2368
2369                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2370                         ieee80211_sta_set_buffered(sta, tid, true);
2371
2372                 if (txqs)
2373                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2374                 /*
2375                  * The fw updates the STA to be asleep. Tx packets on the Tx
2376                  * queues to this station will not be transmitted. The fw will
2377                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2378                  */
2379                 break;
2380         case STA_NOTIFY_AWAKE:
2381                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2382                         break;
2383
2384                 if (txqs)
2385                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2386                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2387                 break;
2388         default:
2389                 break;
2390         }
2391         spin_unlock_bh(&mvmsta->lock);
2392 }
2393
2394 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2395                                    struct ieee80211_vif *vif,
2396                                    enum sta_notify_cmd cmd,
2397                                    struct ieee80211_sta *sta)
2398 {
2399         __iwl_mvm_mac_sta_notify(hw, cmd, sta);
2400 }
2401
2402 void iwl_mvm_sta_pm_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2403 {
2404         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2405         struct iwl_mvm_pm_state_notification *notif = (void *)pkt->data;
2406         struct ieee80211_sta *sta;
2407         struct iwl_mvm_sta *mvmsta;
2408         bool sleeping = (notif->type != IWL_MVM_PM_EVENT_AWAKE);
2409
2410         if (WARN_ON(notif->sta_id >= ARRAY_SIZE(mvm->fw_id_to_mac_id)))
2411                 return;
2412
2413         rcu_read_lock();
2414         sta = mvm->fw_id_to_mac_id[notif->sta_id];
2415         if (WARN_ON(IS_ERR_OR_NULL(sta))) {
2416                 rcu_read_unlock();
2417                 return;
2418         }
2419
2420         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2421
2422         if (!mvmsta->vif ||
2423             mvmsta->vif->type != NL80211_IFTYPE_AP) {
2424                 rcu_read_unlock();
2425                 return;
2426         }
2427
2428         if (mvmsta->sleeping != sleeping) {
2429                 mvmsta->sleeping = sleeping;
2430                 __iwl_mvm_mac_sta_notify(mvm->hw,
2431                         sleeping ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE,
2432                         sta);
2433                 ieee80211_sta_ps_transition(sta, sleeping);
2434         }
2435
2436         if (sleeping) {
2437                 switch (notif->type) {
2438                 case IWL_MVM_PM_EVENT_AWAKE:
2439                 case IWL_MVM_PM_EVENT_ASLEEP:
2440                         break;
2441                 case IWL_MVM_PM_EVENT_UAPSD:
2442                         ieee80211_sta_uapsd_trigger(sta, IEEE80211_NUM_TIDS);
2443                         break;
2444                 case IWL_MVM_PM_EVENT_PS_POLL:
2445                         ieee80211_sta_pspoll(sta);
2446                         break;
2447                 default:
2448                         break;
2449                 }
2450         }
2451
2452         rcu_read_unlock();
2453 }
2454
2455 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2456                                        struct ieee80211_vif *vif,
2457                                        struct ieee80211_sta *sta)
2458 {
2459         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2460         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2461
2462         /*
2463          * This is called before mac80211 does RCU synchronisation,
2464          * so here we already invalidate our internal RCU-protected
2465          * station pointer. The rest of the code will thus no longer
2466          * be able to find the station this way, and we don't rely
2467          * on further RCU synchronisation after the sta_state()
2468          * callback deleted the station.
2469          */
2470         mutex_lock(&mvm->mutex);
2471         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2472                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2473                                    ERR_PTR(-ENOENT));
2474
2475         mutex_unlock(&mvm->mutex);
2476 }
2477
2478 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2479                                 const u8 *bssid)
2480 {
2481         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2482                 return;
2483
2484         if (vif->p2p && !iwl_mvm_is_p2p_scm_uapsd_supported(mvm)) {
2485                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2486                 return;
2487         }
2488
2489         if (!vif->p2p &&
2490             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2491                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2492                 return;
2493         }
2494
2495         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2496 }
2497
2498 static void
2499 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2500                            struct ieee80211_vif *vif, u8 *peer_addr,
2501                            enum nl80211_tdls_operation action)
2502 {
2503         struct iwl_fw_dbg_trigger_tlv *trig;
2504         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2505
2506         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2507                 return;
2508
2509         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2510         tdls_trig = (void *)trig->data;
2511         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2512                 return;
2513
2514         if (!(tdls_trig->action_bitmap & BIT(action)))
2515                 return;
2516
2517         if (tdls_trig->peer_mode &&
2518             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2519                 return;
2520
2521         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2522                                     "TDLS event occurred, peer %pM, action %d",
2523                                     peer_addr, action);
2524 }
2525
2526 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2527                                              struct iwl_mvm_sta *mvm_sta)
2528 {
2529         struct iwl_mvm_tid_data *tid_data;
2530         struct sk_buff *skb;
2531         int i;
2532
2533         spin_lock_bh(&mvm_sta->lock);
2534         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2535                 tid_data = &mvm_sta->tid_data[i];
2536                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2537                         ieee80211_free_txskb(mvm->hw, skb);
2538         }
2539         spin_unlock_bh(&mvm_sta->lock);
2540 }
2541
2542 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2543                                  struct ieee80211_vif *vif,
2544                                  struct ieee80211_sta *sta,
2545                                  enum ieee80211_sta_state old_state,
2546                                  enum ieee80211_sta_state new_state)
2547 {
2548         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2549         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2550         int ret;
2551
2552         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2553                            sta->addr, old_state, new_state);
2554
2555         /* this would be a mac80211 bug ... but don't crash */
2556         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2557                 return -EINVAL;
2558
2559         /* if a STA is being removed, reuse its ID */
2560         flush_work(&mvm->sta_drained_wk);
2561
2562         /*
2563          * If we are in a STA removal flow and in DQA mode:
2564          *
2565          * This is after the sync_rcu part, so the queues have already been
2566          * flushed. No more TXs on their way in mac80211's path, and no more in
2567          * the queues.
2568          * Also, we won't be getting any new TX frames for this station.
2569          * What we might have are deferred TX frames that need to be taken care
2570          * of.
2571          *
2572          * Drop any still-queued deferred-frame before removing the STA, and
2573          * make sure the worker is no longer handling frames for this STA.
2574          */
2575         if (old_state == IEEE80211_STA_NONE &&
2576             new_state == IEEE80211_STA_NOTEXIST &&
2577             iwl_mvm_is_dqa_supported(mvm)) {
2578                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2579
2580                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2581                 flush_work(&mvm->add_stream_wk);
2582
2583                 /*
2584                  * No need to make sure deferred TX indication is off since the
2585                  * worker will already remove it if it was on
2586                  */
2587         }
2588
2589         mutex_lock(&mvm->mutex);
2590         if (old_state == IEEE80211_STA_NOTEXIST &&
2591             new_state == IEEE80211_STA_NONE) {
2592                 /*
2593                  * Firmware bug - it'll crash if the beacon interval is less
2594                  * than 16. We can't avoid connecting at all, so refuse the
2595                  * station state change, this will cause mac80211 to abandon
2596                  * attempts to connect to this AP, and eventually wpa_s will
2597                  * blacklist the AP...
2598                  */
2599                 if (vif->type == NL80211_IFTYPE_STATION &&
2600                     vif->bss_conf.beacon_int < 16) {
2601                         IWL_ERR(mvm,
2602                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2603                                 sta->addr, vif->bss_conf.beacon_int);
2604                         ret = -EINVAL;
2605                         goto out_unlock;
2606                 }
2607
2608                 if (sta->tdls &&
2609                     (vif->p2p ||
2610                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2611                                                 IWL_MVM_TDLS_STA_COUNT ||
2612                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2613                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2614                         ret = -EBUSY;
2615                         goto out_unlock;
2616                 }
2617
2618                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2619                 if (sta->tdls && ret == 0) {
2620                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2621                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2622                                                    NL80211_TDLS_SETUP);
2623                 }
2624         } else if (old_state == IEEE80211_STA_NONE &&
2625                    new_state == IEEE80211_STA_AUTH) {
2626                 /*
2627                  * EBS may be disabled due to previous failures reported by FW.
2628                  * Reset EBS status here assuming environment has been changed.
2629                  */
2630                 mvm->last_ebs_successful = true;
2631                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2632                 ret = 0;
2633         } else if (old_state == IEEE80211_STA_AUTH &&
2634                    new_state == IEEE80211_STA_ASSOC) {
2635                 if (vif->type == NL80211_IFTYPE_AP) {
2636                         mvmvif->ap_assoc_sta_count++;
2637                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2638                 }
2639                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2640                 if (ret == 0)
2641                         iwl_mvm_rs_rate_init(mvm, sta,
2642                                              mvmvif->phy_ctxt->channel->band,
2643                                              true);
2644         } else if (old_state == IEEE80211_STA_ASSOC &&
2645                    new_state == IEEE80211_STA_AUTHORIZED) {
2646
2647                 /* we don't support TDLS during DCM */
2648                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2649                         iwl_mvm_teardown_tdls_peers(mvm);
2650
2651                 if (sta->tdls)
2652                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2653                                                    NL80211_TDLS_ENABLE_LINK);
2654
2655                 /* enable beacon filtering */
2656                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2657                 ret = 0;
2658         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2659                    new_state == IEEE80211_STA_ASSOC) {
2660                 /* disable beacon filtering */
2661                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2662                 ret = 0;
2663         } else if (old_state == IEEE80211_STA_ASSOC &&
2664                    new_state == IEEE80211_STA_AUTH) {
2665                 if (vif->type == NL80211_IFTYPE_AP) {
2666                         mvmvif->ap_assoc_sta_count--;
2667                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2668                 }
2669                 ret = 0;
2670         } else if (old_state == IEEE80211_STA_AUTH &&
2671                    new_state == IEEE80211_STA_NONE) {
2672                 ret = 0;
2673         } else if (old_state == IEEE80211_STA_NONE &&
2674                    new_state == IEEE80211_STA_NOTEXIST) {
2675                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2676                 if (sta->tdls) {
2677                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2678                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2679                                                    NL80211_TDLS_DISABLE_LINK);
2680                 }
2681         } else {
2682                 ret = -EIO;
2683         }
2684  out_unlock:
2685         mutex_unlock(&mvm->mutex);
2686
2687         if (sta->tdls && ret == 0) {
2688                 if (old_state == IEEE80211_STA_NOTEXIST &&
2689                     new_state == IEEE80211_STA_NONE)
2690                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2691                 else if (old_state == IEEE80211_STA_NONE &&
2692                          new_state == IEEE80211_STA_NOTEXIST)
2693                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2694         }
2695
2696         return ret;
2697 }
2698
2699 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2700 {
2701         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2702
2703         mvm->rts_threshold = value;
2704
2705         return 0;
2706 }
2707
2708 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2709                                   struct ieee80211_vif *vif,
2710                                   struct ieee80211_sta *sta, u32 changed)
2711 {
2712         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2713
2714         if (vif->type == NL80211_IFTYPE_STATION &&
2715             changed & IEEE80211_RC_NSS_CHANGED)
2716                 iwl_mvm_sf_update(mvm, vif, false);
2717 }
2718
2719 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2720                                struct ieee80211_vif *vif, u16 ac,
2721                                const struct ieee80211_tx_queue_params *params)
2722 {
2723         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2724         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2725
2726         mvmvif->queue_params[ac] = *params;
2727
2728         /*
2729          * No need to update right away, we'll get BSS_CHANGED_QOS
2730          * The exception is P2P_DEVICE interface which needs immediate update.
2731          */
2732         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2733                 int ret;
2734
2735                 mutex_lock(&mvm->mutex);
2736                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2737                 mutex_unlock(&mvm->mutex);
2738                 return ret;
2739         }
2740         return 0;
2741 }
2742
2743 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2744                                       struct ieee80211_vif *vif)
2745 {
2746         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2747         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2748         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2749
2750         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2751                 return;
2752
2753         /*
2754          * iwl_mvm_protect_session() reads directly from the device
2755          * (the system time), so make sure it is available.
2756          */
2757         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2758                 return;
2759
2760         mutex_lock(&mvm->mutex);
2761         /* Try really hard to protect the session and hear a beacon */
2762         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2763         mutex_unlock(&mvm->mutex);
2764
2765         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2766 }
2767
2768 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2769                                         struct ieee80211_vif *vif,
2770                                         struct cfg80211_sched_scan_request *req,
2771                                         struct ieee80211_scan_ies *ies)
2772 {
2773         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2774
2775         int ret;
2776
2777         mutex_lock(&mvm->mutex);
2778
2779         if (!vif->bss_conf.idle) {
2780                 ret = -EBUSY;
2781                 goto out;
2782         }
2783
2784         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2785
2786 out:
2787         mutex_unlock(&mvm->mutex);
2788         return ret;
2789 }
2790
2791 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2792                                        struct ieee80211_vif *vif)
2793 {
2794         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2795         int ret;
2796
2797         mutex_lock(&mvm->mutex);
2798
2799         /* Due to a race condition, it's possible that mac80211 asks
2800          * us to stop a sched_scan when it's already stopped.  This
2801          * can happen, for instance, if we stopped the scan ourselves,
2802          * called ieee80211_sched_scan_stopped() and the userspace called
2803          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2804          * could run.  To handle this, simply return if the scan is
2805          * not running.
2806         */
2807         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2808                 mutex_unlock(&mvm->mutex);
2809                 return 0;
2810         }
2811
2812         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2813         mutex_unlock(&mvm->mutex);
2814         iwl_mvm_wait_for_async_handlers(mvm);
2815
2816         return ret;
2817 }
2818
2819 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2820                                enum set_key_cmd cmd,
2821                                struct ieee80211_vif *vif,
2822                                struct ieee80211_sta *sta,
2823                                struct ieee80211_key_conf *key)
2824 {
2825         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2826         struct iwl_mvm_sta *mvmsta;
2827         struct iwl_mvm_key_pn *ptk_pn;
2828         int keyidx = key->keyidx;
2829         int ret;
2830         u8 key_offset;
2831
2832         if (iwlwifi_mod_params.sw_crypto) {
2833                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2834                 return -EOPNOTSUPP;
2835         }
2836
2837         switch (key->cipher) {
2838         case WLAN_CIPHER_SUITE_TKIP:
2839                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2840                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2841                 break;
2842         case WLAN_CIPHER_SUITE_CCMP:
2843         case WLAN_CIPHER_SUITE_GCMP:
2844         case WLAN_CIPHER_SUITE_GCMP_256:
2845                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2846                 break;
2847         case WLAN_CIPHER_SUITE_AES_CMAC:
2848         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2849         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2850                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2851                 break;
2852         case WLAN_CIPHER_SUITE_WEP40:
2853         case WLAN_CIPHER_SUITE_WEP104:
2854                 /* For non-client mode, only use WEP keys for TX as we probably
2855                  * don't have a station yet anyway and would then have to keep
2856                  * track of the keys, linking them to each of the clients/peers
2857                  * as they appear. For now, don't do that, for performance WEP
2858                  * offload doesn't really matter much, but we need it for some
2859                  * other offload features in client mode.
2860                  */
2861                 if (vif->type != NL80211_IFTYPE_STATION)
2862                         return 0;
2863                 break;
2864         default:
2865                 /* currently FW supports only one optional cipher scheme */
2866                 if (hw->n_cipher_schemes &&
2867                     hw->cipher_schemes->cipher == key->cipher)
2868                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2869                 else
2870                         return -EOPNOTSUPP;
2871         }
2872
2873         mutex_lock(&mvm->mutex);
2874
2875         switch (cmd) {
2876         case SET_KEY:
2877                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2878                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2879                         /*
2880                          * GTK on AP interface is a TX-only key, return 0;
2881                          * on IBSS they're per-station and because we're lazy
2882                          * we don't support them for RX, so do the same.
2883                          * CMAC/GMAC in AP/IBSS modes must be done in software.
2884                          */
2885                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
2886                             key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
2887                             key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2888                                 ret = -EOPNOTSUPP;
2889                         else
2890                                 ret = 0;
2891                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2892                         break;
2893                 }
2894
2895                 /* During FW restart, in order to restore the state as it was,
2896                  * don't try to reprogram keys we previously failed for.
2897                  */
2898                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2899                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2900                         IWL_DEBUG_MAC80211(mvm,
2901                                            "skip invalid idx key programming during restart\n");
2902                         ret = 0;
2903                         break;
2904                 }
2905
2906                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2907                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2908                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2909                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2910                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2911                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2912                         struct ieee80211_key_seq seq;
2913                         int tid, q;
2914
2915                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2916                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2917                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2918                                          mvm->trans->num_rx_queues *
2919                                                 sizeof(ptk_pn->q[0]),
2920                                          GFP_KERNEL);
2921                         if (!ptk_pn) {
2922                                 ret = -ENOMEM;
2923                                 break;
2924                         }
2925
2926                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2927                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2928                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2929                                         memcpy(ptk_pn->q[q].pn[tid],
2930                                                seq.ccmp.pn,
2931                                                IEEE80211_CCMP_PN_LEN);
2932                         }
2933
2934                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2935                 }
2936
2937                 /* in HW restart reuse the index, otherwise request a new one */
2938                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2939                         key_offset = key->hw_key_idx;
2940                 else
2941                         key_offset = STA_KEY_IDX_INVALID;
2942
2943                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2944                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2945                 if (ret) {
2946                         IWL_WARN(mvm, "set key failed\n");
2947                         /*
2948                          * can't add key for RX, but we don't need it
2949                          * in the device for TX so still return 0
2950                          */
2951                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2952                         ret = 0;
2953                 }
2954
2955                 break;
2956         case DISABLE_KEY:
2957                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2958                         ret = 0;
2959                         break;
2960                 }
2961
2962                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2963                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2964                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2965                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2966                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2967                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2968                         ptk_pn = rcu_dereference_protected(
2969                                                 mvmsta->ptk_pn[keyidx],
2970                                                 lockdep_is_held(&mvm->mutex));
2971                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2972                         if (ptk_pn)
2973                                 kfree_rcu(ptk_pn, rcu_head);
2974                 }
2975
2976                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2977                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2978                 break;
2979         default:
2980                 ret = -EINVAL;
2981         }
2982
2983         mutex_unlock(&mvm->mutex);
2984         return ret;
2985 }
2986
2987 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2988                                         struct ieee80211_vif *vif,
2989                                         struct ieee80211_key_conf *keyconf,
2990                                         struct ieee80211_sta *sta,
2991                                         u32 iv32, u16 *phase1key)
2992 {
2993         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2994
2995         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2996                 return;
2997
2998         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2999 }
3000
3001
3002 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
3003                                struct iwl_rx_packet *pkt, void *data)
3004 {
3005         struct iwl_mvm *mvm =
3006                 container_of(notif_wait, struct iwl_mvm, notif_wait);
3007         struct iwl_hs20_roc_res *resp;
3008         int resp_len = iwl_rx_packet_payload_len(pkt);
3009         struct iwl_mvm_time_event_data *te_data = data;
3010
3011         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
3012                 return true;
3013
3014         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
3015                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
3016                 return true;
3017         }
3018
3019         resp = (void *)pkt->data;
3020
3021         IWL_DEBUG_TE(mvm,
3022                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
3023                      resp->status, resp->event_unique_id);
3024
3025         te_data->uid = le32_to_cpu(resp->event_unique_id);
3026         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
3027                      te_data->uid);
3028
3029         spin_lock_bh(&mvm->time_event_lock);
3030         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
3031         spin_unlock_bh(&mvm->time_event_lock);
3032
3033         return true;
3034 }
3035
3036 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
3037 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
3038 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
3039 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
3040 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
3041 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
3042                                     struct ieee80211_channel *channel,
3043                                     struct ieee80211_vif *vif,
3044                                     int duration)
3045 {
3046         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
3047         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3048         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
3049         static const u16 time_event_response[] = { HOT_SPOT_CMD };
3050         struct iwl_notification_wait wait_time_event;
3051         u32 dtim_interval = vif->bss_conf.dtim_period *
3052                 vif->bss_conf.beacon_int;
3053         u32 req_dur, delay;
3054         struct iwl_hs20_roc_req aux_roc_req = {
3055                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
3056                 .id_and_color =
3057                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
3058                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
3059                 /* Set the channel info data */
3060                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
3061                         PHY_BAND_24 : PHY_BAND_5,
3062                 .channel_info.channel = channel->hw_value,
3063                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
3064                 /* Set the time and duration */
3065                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
3066          };
3067
3068         delay = AUX_ROC_MIN_DELAY;
3069         req_dur = MSEC_TO_TU(duration);
3070
3071         /*
3072          * If we are associated we want the delay time to be at least one
3073          * dtim interval so that the FW can wait until after the DTIM and
3074          * then start the time event, this will potentially allow us to
3075          * remain off-channel for the max duration.
3076          * Since we want to use almost a whole dtim interval we would also
3077          * like the delay to be for 2-3 dtim intervals, in case there are
3078          * other time events with higher priority.
3079          */
3080         if (vif->bss_conf.assoc) {
3081                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
3082                 /* We cannot remain off-channel longer than the DTIM interval */
3083                 if (dtim_interval <= req_dur) {
3084                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
3085                         if (req_dur <= AUX_ROC_MIN_DURATION)
3086                                 req_dur = dtim_interval -
3087                                         AUX_ROC_MIN_SAFETY_BUFFER;
3088                 }
3089         }
3090
3091         aux_roc_req.duration = cpu_to_le32(req_dur);
3092         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
3093
3094         IWL_DEBUG_TE(mvm,
3095                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
3096                      channel->hw_value, req_dur, duration, delay,
3097                      dtim_interval);
3098         /* Set the node address */
3099         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3100
3101         lockdep_assert_held(&mvm->mutex);
3102
3103         spin_lock_bh(&mvm->time_event_lock);
3104
3105         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3106                 spin_unlock_bh(&mvm->time_event_lock);
3107                 return -EIO;
3108         }
3109
3110         te_data->vif = vif;
3111         te_data->duration = duration;
3112         te_data->id = HOT_SPOT_CMD;
3113
3114         spin_unlock_bh(&mvm->time_event_lock);
3115
3116         /*
3117          * Use a notification wait, which really just processes the
3118          * command response and doesn't wait for anything, in order
3119          * to be able to process the response and get the UID inside
3120          * the RX path. Using CMD_WANT_SKB doesn't work because it
3121          * stores the buffer and then wakes up this thread, by which
3122          * time another notification (that the time event started)
3123          * might already be processed unsuccessfully.
3124          */
3125         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3126                                    time_event_response,
3127                                    ARRAY_SIZE(time_event_response),
3128                                    iwl_mvm_rx_aux_roc, te_data);
3129
3130         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3131                                    &aux_roc_req);
3132
3133         if (res) {
3134                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3135                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3136                 goto out_clear_te;
3137         }
3138
3139         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3140         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3141         /* should never fail */
3142         WARN_ON_ONCE(res);
3143
3144         if (res) {
3145  out_clear_te:
3146                 spin_lock_bh(&mvm->time_event_lock);
3147                 iwl_mvm_te_clear_data(mvm, te_data);
3148                 spin_unlock_bh(&mvm->time_event_lock);
3149         }
3150
3151         return res;
3152 }
3153
3154 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3155                        struct ieee80211_vif *vif,
3156                        struct ieee80211_channel *channel,
3157                        int duration,
3158                        enum ieee80211_roc_type type)
3159 {
3160         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3161         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3162         struct cfg80211_chan_def chandef;
3163         struct iwl_mvm_phy_ctxt *phy_ctxt;
3164         int ret, i;
3165
3166         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3167                            duration, type);
3168
3169         flush_work(&mvm->roc_done_wk);
3170
3171         mutex_lock(&mvm->mutex);
3172
3173         switch (vif->type) {
3174         case NL80211_IFTYPE_STATION:
3175                 if (fw_has_capa(&mvm->fw->ucode_capa,
3176                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3177                         /* Use aux roc framework (HS20) */
3178                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3179                                                        vif, duration);
3180                         goto out_unlock;
3181                 }
3182                 IWL_ERR(mvm, "hotspot not supported\n");
3183                 ret = -EINVAL;
3184                 goto out_unlock;
3185         case NL80211_IFTYPE_P2P_DEVICE:
3186                 /* handle below */
3187                 break;
3188         default:
3189                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3190                 ret = -EINVAL;
3191                 goto out_unlock;
3192         }
3193
3194         for (i = 0; i < NUM_PHY_CTX; i++) {
3195                 phy_ctxt = &mvm->phy_ctxts[i];
3196                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3197                         continue;
3198
3199                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3200                         /*
3201                          * Unbind the P2P_DEVICE from the current PHY context,
3202                          * and if the PHY context is not used remove it.
3203                          */
3204                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3205                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3206                                 goto out_unlock;
3207
3208                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3209
3210                         /* Bind the P2P_DEVICE to the current PHY Context */
3211                         mvmvif->phy_ctxt = phy_ctxt;
3212
3213                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3214                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3215                                 goto out_unlock;
3216
3217                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3218                         goto schedule_time_event;
3219                 }
3220         }
3221
3222         /* Need to update the PHY context only if the ROC channel changed */
3223         if (channel == mvmvif->phy_ctxt->channel)
3224                 goto schedule_time_event;
3225
3226         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3227
3228         /*
3229          * Change the PHY context configuration as it is currently referenced
3230          * only by the P2P Device MAC
3231          */
3232         if (mvmvif->phy_ctxt->ref == 1) {
3233                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3234                                                &chandef, 1, 1);
3235                 if (ret)
3236                         goto out_unlock;
3237         } else {
3238                 /*
3239                  * The PHY context is shared with other MACs. Need to remove the
3240                  * P2P Device from the binding, allocate an new PHY context and
3241                  * create a new binding
3242                  */
3243                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3244                 if (!phy_ctxt) {
3245                         ret = -ENOSPC;
3246                         goto out_unlock;
3247                 }
3248
3249                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3250                                                1, 1);
3251                 if (ret) {
3252                         IWL_ERR(mvm, "Failed to change PHY context\n");
3253                         goto out_unlock;
3254                 }
3255
3256                 /* Unbind the P2P_DEVICE from the current PHY context */
3257                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3258                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3259                         goto out_unlock;
3260
3261                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3262
3263                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3264                 mvmvif->phy_ctxt = phy_ctxt;
3265
3266                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3267                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3268                         goto out_unlock;
3269
3270                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3271         }
3272
3273 schedule_time_event:
3274         /* Schedule the time events */
3275         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3276
3277 out_unlock:
3278         mutex_unlock(&mvm->mutex);
3279         IWL_DEBUG_MAC80211(mvm, "leave\n");
3280         return ret;
3281 }
3282
3283 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3284 {
3285         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3286
3287         IWL_DEBUG_MAC80211(mvm, "enter\n");
3288
3289         mutex_lock(&mvm->mutex);
3290         iwl_mvm_stop_roc(mvm);
3291         mutex_unlock(&mvm->mutex);
3292
3293         IWL_DEBUG_MAC80211(mvm, "leave\n");
3294         return 0;
3295 }
3296
3297 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3298                                  struct ieee80211_chanctx_conf *ctx)
3299 {
3300         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3301         struct iwl_mvm_phy_ctxt *phy_ctxt;
3302         int ret;
3303
3304         lockdep_assert_held(&mvm->mutex);
3305
3306         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3307
3308         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3309         if (!phy_ctxt) {
3310                 ret = -ENOSPC;
3311                 goto out;
3312         }
3313
3314         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3315                                        ctx->rx_chains_static,
3316                                        ctx->rx_chains_dynamic);
3317         if (ret) {
3318                 IWL_ERR(mvm, "Failed to add PHY context\n");
3319                 goto out;
3320         }
3321
3322         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3323         *phy_ctxt_id = phy_ctxt->id;
3324 out:
3325         return ret;
3326 }
3327
3328 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3329                                struct ieee80211_chanctx_conf *ctx)
3330 {
3331         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3332         int ret;
3333
3334         mutex_lock(&mvm->mutex);
3335         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3336         mutex_unlock(&mvm->mutex);
3337
3338         return ret;
3339 }
3340
3341 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3342                                      struct ieee80211_chanctx_conf *ctx)
3343 {
3344         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3345         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3346
3347         lockdep_assert_held(&mvm->mutex);
3348
3349         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3350 }
3351
3352 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3353                                    struct ieee80211_chanctx_conf *ctx)
3354 {
3355         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3356
3357         mutex_lock(&mvm->mutex);
3358         __iwl_mvm_remove_chanctx(mvm, ctx);
3359         mutex_unlock(&mvm->mutex);
3360 }
3361
3362 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3363                                    struct ieee80211_chanctx_conf *ctx,
3364                                    u32 changed)
3365 {
3366         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3367         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3368         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3369
3370         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3371                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3372                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3373                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3374                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3375                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3376                       phy_ctxt->ref, changed))
3377                 return;
3378
3379         mutex_lock(&mvm->mutex);
3380         iwl_mvm_bt_coex_vif_change(mvm);
3381         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3382                                  ctx->rx_chains_static,
3383                                  ctx->rx_chains_dynamic);
3384         mutex_unlock(&mvm->mutex);
3385 }
3386
3387 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3388                                         struct ieee80211_vif *vif,
3389                                         struct ieee80211_chanctx_conf *ctx,
3390                                         bool switching_chanctx)
3391 {
3392         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3393         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3394         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3395         int ret;
3396
3397         lockdep_assert_held(&mvm->mutex);
3398
3399         mvmvif->phy_ctxt = phy_ctxt;
3400
3401         switch (vif->type) {
3402         case NL80211_IFTYPE_AP:
3403                 /* only needed if we're switching chanctx (i.e. during CSA) */
3404                 if (switching_chanctx) {
3405                         mvmvif->ap_ibss_active = true;
3406                         break;
3407                 }
3408         case NL80211_IFTYPE_ADHOC:
3409                 /*
3410                  * The AP binding flow is handled as part of the start_ap flow
3411                  * (in bss_info_changed), similarly for IBSS.
3412                  */
3413                 ret = 0;
3414                 goto out;
3415         case NL80211_IFTYPE_STATION:
3416                 break;
3417         case NL80211_IFTYPE_MONITOR:
3418                 /* always disable PS when a monitor interface is active */
3419                 mvmvif->ps_disabled = true;
3420                 break;
3421         default:
3422                 ret = -EINVAL;
3423                 goto out;
3424         }
3425
3426         ret = iwl_mvm_binding_add_vif(mvm, vif);
3427         if (ret)
3428                 goto out;
3429
3430         /*
3431          * Power state must be updated before quotas,
3432          * otherwise fw will complain.
3433          */
3434         iwl_mvm_power_update_mac(mvm);
3435
3436         /* Setting the quota at this stage is only required for monitor
3437          * interfaces. For the other types, the bss_info changed flow
3438          * will handle quota settings.
3439          */
3440         if (vif->type == NL80211_IFTYPE_MONITOR) {
3441                 mvmvif->monitor_active = true;
3442                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3443                 if (ret)
3444                         goto out_remove_binding;
3445
3446                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3447                 if (ret)
3448                         goto out_remove_binding;
3449
3450         }
3451
3452         /* Handle binding during CSA */
3453         if (vif->type == NL80211_IFTYPE_AP) {
3454                 iwl_mvm_update_quotas(mvm, false, NULL);
3455                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3456         }
3457
3458         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3459                 u32 duration = 2 * vif->bss_conf.beacon_int;
3460
3461                 /* iwl_mvm_protect_session() reads directly from the
3462                  * device (the system time), so make sure it is
3463                  * available.
3464                  */
3465                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3466                 if (ret)
3467                         goto out_remove_binding;
3468
3469                 /* Protect the session to make sure we hear the first
3470                  * beacon on the new channel.
3471                  */
3472                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3473                                         vif->bss_conf.beacon_int / 2,
3474                                         true);
3475
3476                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3477
3478                 iwl_mvm_update_quotas(mvm, false, NULL);
3479         }
3480
3481         goto out;
3482
3483 out_remove_binding:
3484         iwl_mvm_binding_remove_vif(mvm, vif);
3485         iwl_mvm_power_update_mac(mvm);
3486 out:
3487         if (ret)
3488                 mvmvif->phy_ctxt = NULL;
3489         return ret;
3490 }
3491 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3492                                       struct ieee80211_vif *vif,
3493                                       struct ieee80211_chanctx_conf *ctx)
3494 {
3495         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3496         int ret;
3497
3498         mutex_lock(&mvm->mutex);
3499         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3500         mutex_unlock(&mvm->mutex);
3501
3502         return ret;
3503 }
3504
3505 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3506                                            struct ieee80211_vif *vif,
3507                                            struct ieee80211_chanctx_conf *ctx,
3508                                            bool switching_chanctx)
3509 {
3510         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3511         struct ieee80211_vif *disabled_vif = NULL;
3512
3513         lockdep_assert_held(&mvm->mutex);
3514
3515         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3516
3517         switch (vif->type) {
3518         case NL80211_IFTYPE_ADHOC:
3519                 goto out;
3520         case NL80211_IFTYPE_MONITOR:
3521                 mvmvif->monitor_active = false;
3522                 mvmvif->ps_disabled = false;
3523                 iwl_mvm_rm_snif_sta(mvm, vif);
3524                 break;
3525         case NL80211_IFTYPE_AP:
3526                 /* This part is triggered only during CSA */
3527                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3528                         goto out;
3529
3530                 mvmvif->csa_countdown = false;
3531
3532                 /* Set CS bit on all the stations */
3533                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3534
3535                 /* Save blocked iface, the timeout is set on the next beacon */
3536                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3537
3538                 mvmvif->ap_ibss_active = false;
3539                 break;
3540         case NL80211_IFTYPE_STATION:
3541                 if (!switching_chanctx)
3542                         break;
3543
3544                 disabled_vif = vif;
3545
3546                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3547                 break;
3548         default:
3549                 break;
3550         }
3551
3552         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3553         iwl_mvm_binding_remove_vif(mvm, vif);
3554
3555 out:
3556         mvmvif->phy_ctxt = NULL;
3557         iwl_mvm_power_update_mac(mvm);
3558 }
3559
3560 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3561                                          struct ieee80211_vif *vif,
3562                                          struct ieee80211_chanctx_conf *ctx)
3563 {
3564         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3565
3566         mutex_lock(&mvm->mutex);
3567         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3568         mutex_unlock(&mvm->mutex);
3569 }
3570
3571 static int
3572 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3573                                 struct ieee80211_vif_chanctx_switch *vifs)
3574 {
3575         int ret;
3576
3577         mutex_lock(&mvm->mutex);
3578         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3579         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3580
3581         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3582         if (ret) {
3583                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3584                 goto out_reassign;
3585         }
3586
3587         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3588                                            true);
3589         if (ret) {
3590                 IWL_ERR(mvm,
3591                         "failed to assign new_ctx during channel switch\n");
3592                 goto out_remove;
3593         }
3594
3595         /* we don't support TDLS during DCM - can be caused by channel switch */
3596         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3597                 iwl_mvm_teardown_tdls_peers(mvm);
3598
3599         goto out;
3600
3601 out_remove:
3602         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3603
3604 out_reassign:
3605         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3606                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3607                 goto out_restart;
3608         }
3609
3610         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3611                                          true)) {
3612                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3613                 goto out_restart;
3614         }
3615
3616         goto out;
3617
3618 out_restart:
3619         /* things keep failing, better restart the hw */
3620         iwl_mvm_nic_restart(mvm, false);
3621
3622 out:
3623         mutex_unlock(&mvm->mutex);
3624
3625         return ret;
3626 }
3627
3628 static int
3629 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3630                                     struct ieee80211_vif_chanctx_switch *vifs)
3631 {
3632         int ret;
3633
3634         mutex_lock(&mvm->mutex);
3635         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3636
3637         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3638                                            true);
3639         if (ret) {
3640                 IWL_ERR(mvm,
3641                         "failed to assign new_ctx during channel switch\n");
3642                 goto out_reassign;
3643         }
3644
3645         goto out;
3646
3647 out_reassign:
3648         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3649                                          true)) {
3650                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3651                 goto out_restart;
3652         }
3653
3654         goto out;
3655
3656 out_restart:
3657         /* things keep failing, better restart the hw */
3658         iwl_mvm_nic_restart(mvm, false);
3659
3660 out:
3661         mutex_unlock(&mvm->mutex);
3662
3663         return ret;
3664 }
3665
3666 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3667                                       struct ieee80211_vif_chanctx_switch *vifs,
3668                                       int n_vifs,
3669                                       enum ieee80211_chanctx_switch_mode mode)
3670 {
3671         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3672         int ret;
3673
3674         /* we only support a single-vif right now */
3675         if (n_vifs > 1)
3676                 return -EOPNOTSUPP;
3677
3678         switch (mode) {
3679         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3680                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3681                 break;
3682         case CHANCTX_SWMODE_REASSIGN_VIF:
3683                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3684                 break;
3685         default:
3686                 ret = -EOPNOTSUPP;
3687                 break;
3688         }
3689
3690         return ret;
3691 }
3692
3693 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3694                            struct ieee80211_sta *sta,
3695                            bool set)
3696 {
3697         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3698         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3699
3700         if (!mvm_sta || !mvm_sta->vif) {
3701                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3702                 return -EINVAL;
3703         }
3704
3705         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3706 }
3707
3708 #ifdef CONFIG_NL80211_TESTMODE
3709 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3710         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3711         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3712         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3713 };
3714
3715 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3716                                       struct ieee80211_vif *vif,
3717                                       void *data, int len)
3718 {
3719         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3720         int err;
3721         u32 noa_duration;
3722
3723         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3724         if (err)
3725                 return err;
3726
3727         if (!tb[IWL_MVM_TM_ATTR_CMD])
3728                 return -EINVAL;
3729
3730         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3731         case IWL_MVM_TM_CMD_SET_NOA:
3732                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3733                     !vif->bss_conf.enable_beacon ||
3734                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3735                         return -EINVAL;
3736
3737                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3738                 if (noa_duration >= vif->bss_conf.beacon_int)
3739                         return -EINVAL;
3740
3741                 mvm->noa_duration = noa_duration;
3742                 mvm->noa_vif = vif;
3743
3744                 return iwl_mvm_update_quotas(mvm, false, NULL);
3745         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3746                 /* must be associated client vif - ignore authorized */
3747                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3748                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3749                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3750                         return -EINVAL;
3751
3752                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3753                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3754                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3755         }
3756
3757         return -EOPNOTSUPP;
3758 }
3759
3760 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3761                                     struct ieee80211_vif *vif,
3762                                     void *data, int len)
3763 {
3764         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3765         int err;
3766
3767         mutex_lock(&mvm->mutex);
3768         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3769         mutex_unlock(&mvm->mutex);
3770
3771         return err;
3772 }
3773 #endif
3774
3775 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3776                                    struct ieee80211_vif *vif,
3777                                    struct ieee80211_channel_switch *chsw)
3778 {
3779         /* By implementing this operation, we prevent mac80211 from
3780          * starting its own channel switch timer, so that we can call
3781          * ieee80211_chswitch_done() ourselves at the right time
3782          * (which is when the absence time event starts).
3783          */
3784
3785         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3786                            "dummy channel switch op\n");
3787 }
3788
3789 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3790                                       struct ieee80211_vif *vif,
3791                                       struct ieee80211_channel_switch *chsw)
3792 {
3793         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3794         struct ieee80211_vif *csa_vif;
3795         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3796         u32 apply_time;
3797         int ret;
3798
3799         mutex_lock(&mvm->mutex);
3800
3801         mvmvif->csa_failed = false;
3802
3803         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3804                            chsw->chandef.center_freq1);
3805
3806         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3807
3808         switch (vif->type) {
3809         case NL80211_IFTYPE_AP:
3810                 csa_vif =
3811                         rcu_dereference_protected(mvm->csa_vif,
3812                                                   lockdep_is_held(&mvm->mutex));
3813                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3814                               "Another CSA is already in progress")) {
3815                         ret = -EBUSY;
3816                         goto out_unlock;
3817                 }
3818
3819                 /* we still didn't unblock tx. prevent new CS meanwhile */
3820                 if (rcu_dereference_protected(mvm->csa_tx_blocked_vif,
3821                                               lockdep_is_held(&mvm->mutex))) {
3822                         ret = -EBUSY;
3823                         goto out_unlock;
3824                 }
3825
3826                 rcu_assign_pointer(mvm->csa_vif, vif);
3827
3828                 if (WARN_ONCE(mvmvif->csa_countdown,
3829                               "Previous CSA countdown didn't complete")) {
3830                         ret = -EBUSY;
3831                         goto out_unlock;
3832                 }
3833
3834                 mvmvif->csa_target_freq = chsw->chandef.chan->center_freq;
3835
3836                 break;
3837         case NL80211_IFTYPE_STATION:
3838                 if (mvmvif->lqm_active)
3839                         iwl_mvm_send_lqm_cmd(vif,
3840                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3841                                              0, 0);
3842
3843                 /* Schedule the time event to a bit before beacon 1,
3844                  * to make sure we're in the new channel when the
3845                  * GO/AP arrives.
3846                  */
3847                 apply_time = chsw->device_timestamp +
3848                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3849                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3850
3851                 if (chsw->block_tx)
3852                         iwl_mvm_csa_client_absent(mvm, vif);
3853
3854                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3855                                             apply_time);
3856                 if (mvmvif->bf_data.bf_enabled) {
3857                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3858                         if (ret)
3859                                 goto out_unlock;
3860                 }
3861
3862                 break;
3863         default:
3864                 break;
3865         }
3866
3867         mvmvif->ps_disabled = true;
3868
3869         ret = iwl_mvm_power_update_ps(mvm);
3870         if (ret)
3871                 goto out_unlock;
3872
3873         /* we won't be on this channel any longer */
3874         iwl_mvm_teardown_tdls_peers(mvm);
3875
3876 out_unlock:
3877         mutex_unlock(&mvm->mutex);
3878
3879         return ret;
3880 }
3881
3882 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3883                                        struct ieee80211_vif *vif)
3884 {
3885         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3886         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3887         int ret;
3888
3889         mutex_lock(&mvm->mutex);
3890
3891         if (mvmvif->csa_failed) {
3892                 mvmvif->csa_failed = false;
3893                 ret = -EIO;
3894                 goto out_unlock;
3895         }
3896
3897         if (vif->type == NL80211_IFTYPE_STATION) {
3898                 struct iwl_mvm_sta *mvmsta;
3899
3900                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3901                                                           mvmvif->ap_sta_id);
3902
3903                 if (WARN_ON(!mvmsta)) {
3904                         ret = -EIO;
3905                         goto out_unlock;
3906                 }
3907
3908                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3909
3910                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3911
3912                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3913                 if (ret)
3914                         goto out_unlock;
3915
3916                 iwl_mvm_stop_session_protection(mvm, vif);
3917         }
3918
3919         mvmvif->ps_disabled = false;
3920
3921         ret = iwl_mvm_power_update_ps(mvm);
3922
3923 out_unlock:
3924         mutex_unlock(&mvm->mutex);
3925
3926         return ret;
3927 }
3928
3929 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3930                               struct ieee80211_vif *vif, u32 queues, bool drop)
3931 {
3932         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3933         struct iwl_mvm_vif *mvmvif;
3934         struct iwl_mvm_sta *mvmsta;
3935         struct ieee80211_sta *sta;
3936         int i;
3937         u32 msk = 0;
3938
3939         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3940                 return;
3941
3942         /* Make sure we're done with the deferred traffic before flushing */
3943         if (iwl_mvm_is_dqa_supported(mvm))
3944                 flush_work(&mvm->add_stream_wk);
3945
3946         mutex_lock(&mvm->mutex);
3947         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3948
3949         /* flush the AP-station and all TDLS peers */
3950         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3951                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3952                                                 lockdep_is_held(&mvm->mutex));
3953                 if (IS_ERR_OR_NULL(sta))
3954                         continue;
3955
3956                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3957                 if (mvmsta->vif != vif)
3958                         continue;
3959
3960                 /* make sure only TDLS peers or the AP are flushed */
3961                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3962
3963                 msk |= mvmsta->tfd_queue_msk;
3964         }
3965
3966         if (drop) {
3967                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3968                         IWL_ERR(mvm, "flush request fail\n");
3969                 mutex_unlock(&mvm->mutex);
3970         } else {
3971                 mutex_unlock(&mvm->mutex);
3972
3973                 /* this can take a while, and we may need/want other operations
3974                  * to succeed while doing this, so do it without the mutex held
3975                  */
3976                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3977         }
3978 }
3979
3980 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3981                                   struct survey_info *survey)
3982 {
3983         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3984         int ret;
3985
3986         memset(survey, 0, sizeof(*survey));
3987
3988         /* only support global statistics right now */
3989         if (idx != 0)
3990                 return -ENOENT;
3991
3992         if (!fw_has_capa(&mvm->fw->ucode_capa,
3993                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3994                 return -ENOENT;
3995
3996         mutex_lock(&mvm->mutex);
3997
3998         if (mvm->ucode_loaded) {
3999                 ret = iwl_mvm_request_statistics(mvm, false);
4000                 if (ret)
4001                         goto out;
4002         }
4003
4004         survey->filled = SURVEY_INFO_TIME |
4005                          SURVEY_INFO_TIME_RX |
4006                          SURVEY_INFO_TIME_TX |
4007                          SURVEY_INFO_TIME_SCAN;
4008         survey->time = mvm->accu_radio_stats.on_time_rf +
4009                        mvm->radio_stats.on_time_rf;
4010         do_div(survey->time, USEC_PER_MSEC);
4011
4012         survey->time_rx = mvm->accu_radio_stats.rx_time +
4013                           mvm->radio_stats.rx_time;
4014         do_div(survey->time_rx, USEC_PER_MSEC);
4015
4016         survey->time_tx = mvm->accu_radio_stats.tx_time +
4017                           mvm->radio_stats.tx_time;
4018         do_div(survey->time_tx, USEC_PER_MSEC);
4019
4020         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
4021                             mvm->radio_stats.on_time_scan;
4022         do_div(survey->time_scan, USEC_PER_MSEC);
4023
4024         ret = 0;
4025  out:
4026         mutex_unlock(&mvm->mutex);
4027         return ret;
4028 }
4029
4030 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
4031                                        struct ieee80211_vif *vif,
4032                                        struct ieee80211_sta *sta,
4033                                        struct station_info *sinfo)
4034 {
4035         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4036         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4037         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4038
4039         if (mvmsta->avg_energy) {
4040                 sinfo->signal_avg = mvmsta->avg_energy;
4041                 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
4042         }
4043
4044         if (!fw_has_capa(&mvm->fw->ucode_capa,
4045                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
4046                 return;
4047
4048         /* if beacon filtering isn't on mac80211 does it anyway */
4049         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
4050                 return;
4051
4052         if (!vif->bss_conf.assoc)
4053                 return;
4054
4055         mutex_lock(&mvm->mutex);
4056
4057         if (mvmvif->ap_sta_id != mvmsta->sta_id)
4058                 goto unlock;
4059
4060         if (iwl_mvm_request_statistics(mvm, false))
4061                 goto unlock;
4062
4063         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
4064                            mvmvif->beacon_stats.accu_num_beacons;
4065         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
4066         if (mvmvif->beacon_stats.avg_signal) {
4067                 /* firmware only reports a value after RXing a few beacons */
4068                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
4069                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
4070         }
4071  unlock:
4072         mutex_unlock(&mvm->mutex);
4073 }
4074
4075 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4076                                         struct ieee80211_vif *vif,
4077                                         const struct ieee80211_event *event)
4078 {
4079 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4080         do {                                                    \
4081                 if ((_cnt) && --(_cnt))                         \
4082                         break;                                  \
4083                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4084         } while (0)
4085
4086         struct iwl_fw_dbg_trigger_tlv *trig;
4087         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4088
4089         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4090                 return;
4091
4092         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4093         trig_mlme = (void *)trig->data;
4094         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4095                 return;
4096
4097         if (event->u.mlme.data == ASSOC_EVENT) {
4098                 if (event->u.mlme.status == MLME_DENIED)
4099                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4100                                            trig_mlme->stop_assoc_denied,
4101                                            "DENIED ASSOC: reason %d",
4102                                             event->u.mlme.reason);
4103                 else if (event->u.mlme.status == MLME_TIMEOUT)
4104                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4105                                            trig_mlme->stop_assoc_timeout,
4106                                            "ASSOC TIMEOUT");
4107         } else if (event->u.mlme.data == AUTH_EVENT) {
4108                 if (event->u.mlme.status == MLME_DENIED)
4109                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4110                                            trig_mlme->stop_auth_denied,
4111                                            "DENIED AUTH: reason %d",
4112                                            event->u.mlme.reason);
4113                 else if (event->u.mlme.status == MLME_TIMEOUT)
4114                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4115                                            trig_mlme->stop_auth_timeout,
4116                                            "AUTH TIMEOUT");
4117         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4118                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4119                                    trig_mlme->stop_rx_deauth,
4120                                    "DEAUTH RX %d", event->u.mlme.reason);
4121         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4122                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4123                                    trig_mlme->stop_tx_deauth,
4124                                    "DEAUTH TX %d", event->u.mlme.reason);
4125         }
4126 #undef CHECK_MLME_TRIGGER
4127 }
4128
4129 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4130                                           struct ieee80211_vif *vif,
4131                                           const struct ieee80211_event *event)
4132 {
4133         struct iwl_fw_dbg_trigger_tlv *trig;
4134         struct iwl_fw_dbg_trigger_ba *ba_trig;
4135
4136         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4137                 return;
4138
4139         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4140         ba_trig = (void *)trig->data;
4141         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4142                 return;
4143
4144         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4145                 return;
4146
4147         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4148                                     "BAR received from %pM, tid %d, ssn %d",
4149                                     event->u.ba.sta->addr, event->u.ba.tid,
4150                                     event->u.ba.ssn);
4151 }
4152
4153 static void
4154 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4155                                      struct ieee80211_vif *vif,
4156                                      const struct ieee80211_event *event)
4157 {
4158         struct iwl_fw_dbg_trigger_tlv *trig;
4159         struct iwl_fw_dbg_trigger_ba *ba_trig;
4160
4161         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4162                 return;
4163
4164         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4165         ba_trig = (void *)trig->data;
4166         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4167                 return;
4168
4169         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4170                 return;
4171
4172         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4173                                     "Frame from %pM timed out, tid %d",
4174                                     event->u.ba.sta->addr, event->u.ba.tid);
4175 }
4176
4177 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4178                                        struct ieee80211_vif *vif,
4179                                        const struct ieee80211_event *event)
4180 {
4181         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4182
4183         switch (event->type) {
4184         case MLME_EVENT:
4185                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4186                 break;
4187         case BAR_RX_EVENT:
4188                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4189                 break;
4190         case BA_FRAME_TIMEOUT:
4191                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4192                 break;
4193         default:
4194                 break;
4195         }
4196 }
4197
4198 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4199                                      struct iwl_mvm_internal_rxq_notif *notif,
4200                                      u32 size)
4201 {
4202         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(notif_waitq);
4203         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4204         int ret;
4205
4206         lockdep_assert_held(&mvm->mutex);
4207
4208         if (!iwl_mvm_has_new_rx_api(mvm))
4209                 return;
4210
4211         notif->cookie = mvm->queue_sync_cookie;
4212
4213         if (notif->sync)
4214                 atomic_set(&mvm->queue_sync_counter,
4215                            mvm->trans->num_rx_queues);
4216
4217         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4218         if (ret) {
4219                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4220                 goto out;
4221         }
4222
4223         if (notif->sync)
4224                 ret = wait_event_timeout(notif_waitq,
4225                                          atomic_read(&mvm->queue_sync_counter) == 0,
4226                                          HZ);
4227         WARN_ON_ONCE(!ret);
4228
4229 out:
4230         atomic_set(&mvm->queue_sync_counter, 0);
4231         mvm->queue_sync_cookie++;
4232 }
4233
4234 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4235 {
4236         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4237         struct iwl_mvm_internal_rxq_notif data = {
4238                 .type = IWL_MVM_RXQ_EMPTY,
4239                 .sync = 1,
4240         };
4241
4242         mutex_lock(&mvm->mutex);
4243         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4244         mutex_unlock(&mvm->mutex);
4245 }
4246
4247 const struct ieee80211_ops iwl_mvm_hw_ops = {
4248         .tx = iwl_mvm_mac_tx,
4249         .ampdu_action = iwl_mvm_mac_ampdu_action,
4250         .start = iwl_mvm_mac_start,
4251         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4252         .stop = iwl_mvm_mac_stop,
4253         .add_interface = iwl_mvm_mac_add_interface,
4254         .remove_interface = iwl_mvm_mac_remove_interface,
4255         .config = iwl_mvm_mac_config,
4256         .prepare_multicast = iwl_mvm_prepare_multicast,
4257         .configure_filter = iwl_mvm_configure_filter,
4258         .config_iface_filter = iwl_mvm_config_iface_filter,
4259         .bss_info_changed = iwl_mvm_bss_info_changed,
4260         .hw_scan = iwl_mvm_mac_hw_scan,
4261         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4262         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4263         .sta_state = iwl_mvm_mac_sta_state,
4264         .sta_notify = iwl_mvm_mac_sta_notify,
4265         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4266         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4267         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4268         .sta_rc_update = iwl_mvm_sta_rc_update,
4269         .conf_tx = iwl_mvm_mac_conf_tx,
4270         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4271         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4272         .flush = iwl_mvm_mac_flush,
4273         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4274         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4275         .set_key = iwl_mvm_mac_set_key,
4276         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4277         .remain_on_channel = iwl_mvm_roc,
4278         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4279         .add_chanctx = iwl_mvm_add_chanctx,
4280         .remove_chanctx = iwl_mvm_remove_chanctx,
4281         .change_chanctx = iwl_mvm_change_chanctx,
4282         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4283         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4284         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4285
4286         .start_ap = iwl_mvm_start_ap_ibss,
4287         .stop_ap = iwl_mvm_stop_ap_ibss,
4288         .join_ibss = iwl_mvm_start_ap_ibss,
4289         .leave_ibss = iwl_mvm_stop_ap_ibss,
4290
4291         .set_tim = iwl_mvm_set_tim,
4292
4293         .channel_switch = iwl_mvm_channel_switch,
4294         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4295         .post_channel_switch = iwl_mvm_post_channel_switch,
4296
4297         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4298         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4299         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4300
4301         .event_callback = iwl_mvm_mac_event_callback,
4302
4303         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4304
4305         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4306
4307 #ifdef CONFIG_PM_SLEEP
4308         /* look at d3.c */
4309         .suspend = iwl_mvm_suspend,
4310         .resume = iwl_mvm_resume,
4311         .set_wakeup = iwl_mvm_set_wakeup,
4312         .set_rekey_data = iwl_mvm_set_rekey_data,
4313 #if IS_ENABLED(CONFIG_IPV6)
4314         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4315 #endif
4316         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4317 #endif
4318         .get_survey = iwl_mvm_mac_get_survey,
4319         .sta_statistics = iwl_mvm_mac_sta_statistics,
4320 };