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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
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  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
  25  *
  26  * The full GNU General Public License is included in this distribution
  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  37  * All rights reserved.
  38  *
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  40  * modification, are permitted provided that the following conditions
  41  * are met:
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  43  *  * Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  *  * Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in
  47  *    the documentation and/or other materials provided with the
  48  *    distribution.
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  50  *    contributors may be used to endorse or promote products derived
  51  *    from this software without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  54  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  55  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  56  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  57  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  58  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  59  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  60  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  61  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  62  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  63  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  64  *
  65  *****************************************************************************/
  66 #include <linux/kernel.h>
  67 #include <linux/slab.h>
  68 #include <linux/skbuff.h>
  69 #include <linux/netdevice.h>
  70 #include <linux/etherdevice.h>
  71 #include <linux/ip.h>
  72 #include <linux/if_arp.h>
  73 #include <linux/time.h>
  74 #include <net/mac80211.h>
  75 #include <net/ieee80211_radiotap.h>
  76 #include <net/tcp.h>
  77
  78 #include "iwl-op-mode.h"
  79 #include "iwl-io.h"
  80 #include "mvm.h"
  81 #include "sta.h"
  82 #include "time-event.h"
  83 #include "iwl-eeprom-parse.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88 #include "iwl-nvm-parse.h"
  89 #include "fw-dbg.h"
  90
  91 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  92         {
  93                 .max = 1,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_AP) |
  99                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 100                         BIT(NL80211_IFTYPE_P2P_GO),
 101         },
 102         {
 103                 .max = 1,
 104                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 105         },
 106 };
 107
 108 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 109         {
 110                 .num_different_channels = 2,
 111                 .max_interfaces = 3,
 112                 .limits = iwl_mvm_limits,
 113                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 114         },
 115 };
 116
 117 #ifdef CONFIG_PM_SLEEP
 118 static const struct nl80211_wowlan_tcp_data_token_feature
 119 iwl_mvm_wowlan_tcp_token_feature = {
 120         .min_len = 0,
 121         .max_len = 255,
 122         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 123 };
 124
 125 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 126         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 127         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 128                             sizeof(struct ethhdr) -
 129                             sizeof(struct iphdr) -
 130                             sizeof(struct tcphdr),
 131         .data_interval_max = 65535, /* __le16 in API */
 132         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 133                             sizeof(struct ethhdr) -
 134                             sizeof(struct iphdr) -
 135                             sizeof(struct tcphdr),
 136         .seq = true,
 137 };
 138 #endif
 139
 140 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 141 /*
 142  * Use the reserved field to indicate magic values.
 143  * these values will only be used internally by the driver,
 144  * and won't make it to the fw (reserved will be 0).
 145  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 146  *      be the vif's ip address. in case there is not a single
 147  *      ip address (0, or more than 1), this attribute will
 148  *      be skipped.
 149  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 150  *      the LSB bytes of the vif's mac address
 151  */
 152 enum {
 153         BC_FILTER_MAGIC_NONE = 0,
 154         BC_FILTER_MAGIC_IP,
 155         BC_FILTER_MAGIC_MAC,
 156 };
 157
 158 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 159         {
 160                 /* arp */
 161                 .discard = 0,
 162                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 163                 .attrs = {
 164                         {
 165                                 /* frame type - arp, hw type - ethernet */
 166                                 .offset_type =
 167                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 168                                 .offset = sizeof(rfc1042_header),
 169                                 .val = cpu_to_be32(0x08060001),
 170                                 .mask = cpu_to_be32(0xffffffff),
 171                         },
 172                         {
 173                                 /* arp dest ip */
 174                                 .offset_type =
 175                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 176                                 .offset = sizeof(rfc1042_header) + 2 +
 177                                           sizeof(struct arphdr) +
 178                                           ETH_ALEN + sizeof(__be32) +
 179                                           ETH_ALEN,
 180                                 .mask = cpu_to_be32(0xffffffff),
 181                                 /* mark it as special field */
 182                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 183                         },
 184                 },
 185         },
 186         {
 187                 /* dhcp offer bcast */
 188                 .discard = 0,
 189                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 190                 .attrs = {
 191                         {
 192                                 /* udp dest port - 68 (bootp client)*/
 193                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 194                                 .offset = offsetof(struct udphdr, dest),
 195                                 .val = cpu_to_be32(0x00440000),
 196                                 .mask = cpu_to_be32(0xffff0000),
 197                         },
 198                         {
 199                                 /* dhcp - lsb bytes of client hw address */
 200                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 201                                 .offset = 38,
 202                                 .mask = cpu_to_be32(0xffffffff),
 203                                 /* mark it as special field */
 204                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 205                         },
 206                 },
 207         },
 208         /* last filter must be empty */
 209         {},
 210 };
 211 #endif
 212
 213 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 214 {
 215         if (!iwl_mvm_is_d0i3_supported(mvm))
 216                 return;
 217
 218         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 219         spin_lock_bh(&mvm->refs_lock);
 220         mvm->refs[ref_type]++;
 221         spin_unlock_bh(&mvm->refs_lock);
 222         iwl_trans_ref(mvm->trans);
 223 }
 224
 225 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 226 {
 227         if (!iwl_mvm_is_d0i3_supported(mvm))
 228                 return;
 229
 230         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 231         spin_lock_bh(&mvm->refs_lock);
 232         if (WARN_ON(!mvm->refs[ref_type])) {
 233                 spin_unlock_bh(&mvm->refs_lock);
 234                 return;
 235         }
 236         mvm->refs[ref_type]--;
 237         spin_unlock_bh(&mvm->refs_lock);
 238         iwl_trans_unref(mvm->trans);
 239 }
 240
 241 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 242                                      enum iwl_mvm_ref_type except_ref)
 243 {
 244         int i, j;
 245
 246         if (!iwl_mvm_is_d0i3_supported(mvm))
 247                 return;
 248
 249         spin_lock_bh(&mvm->refs_lock);
 250         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 251                 if (except_ref == i || !mvm->refs[i])
 252                         continue;
 253
 254                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 255                               i, mvm->refs[i]);
 256                 for (j = 0; j < mvm->refs[i]; j++)
 257                         iwl_trans_unref(mvm->trans);
 258                 mvm->refs[i] = 0;
 259         }
 260         spin_unlock_bh(&mvm->refs_lock);
 261 }
 262
 263 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 264 {
 265         int i;
 266         bool taken = false;
 267
 268         if (!iwl_mvm_is_d0i3_supported(mvm))
 269                 return true;
 270
 271         spin_lock_bh(&mvm->refs_lock);
 272         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 273                 if (mvm->refs[i]) {
 274                         taken = true;
 275                         break;
 276                 }
 277         }
 278         spin_unlock_bh(&mvm->refs_lock);
 279
 280         return taken;
 281 }
 282
 283 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 284 {
 285         iwl_mvm_ref(mvm, ref_type);
 286
 287         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 288                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 289                                 HZ)) {
 290                 WARN_ON_ONCE(1);
 291                 iwl_mvm_unref(mvm, ref_type);
 292                 return -EIO;
 293         }
 294
 295         return 0;
 296 }
 297
 298 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 299 {
 300         int i;
 301
 302         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 303         for (i = 0; i < NUM_PHY_CTX; i++) {
 304                 mvm->phy_ctxts[i].id = i;
 305                 mvm->phy_ctxts[i].ref = 0;
 306         }
 307 }
 308
 309 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 310                                                   const char *alpha2,
 311                                                   enum iwl_mcc_source src_id,
 312                                                   bool *changed)
 313 {
 314         struct ieee80211_regdomain *regd = NULL;
 315         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 316         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 317         struct iwl_mcc_update_resp *resp;
 318
 319         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 320
 321         lockdep_assert_held(&mvm->mutex);
 322
 323         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 324         if (IS_ERR_OR_NULL(resp)) {
 325                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 326                               PTR_ERR_OR_ZERO(resp));
 327                 goto out;
 328         }
 329
 330         if (changed)
 331                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 332
 333         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 334                                       __le32_to_cpu(resp->n_channels),
 335                                       resp->channels,
 336                                       __le16_to_cpu(resp->mcc));
 337         /* Store the return source id */
 338         src_id = resp->source_id;
 339         kfree(resp);
 340         if (IS_ERR_OR_NULL(regd)) {
 341                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 342                               PTR_ERR_OR_ZERO(regd));
 343                 goto out;
 344         }
 345
 346         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 347                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 348         mvm->lar_regdom_set = true;
 349         mvm->mcc_src = src_id;
 350
 351 out:
 352         return regd;
 353 }
 354
 355 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 356 {
 357         bool changed;
 358         struct ieee80211_regdomain *regd;
 359
 360         if (!iwl_mvm_is_lar_supported(mvm))
 361                 return;
 362
 363         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 364         if (!IS_ERR_OR_NULL(regd)) {
 365                 /* only update the regulatory core if changed */
 366                 if (changed)
 367                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 368
 369                 kfree(regd);
 370         }
 371 }
 372
 373 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 374                                                           bool *changed)
 375 {
 376         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 377                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 378                                      MCC_SOURCE_GET_CURRENT :
 379                                      MCC_SOURCE_OLD_FW, changed);
 380 }
 381
 382 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 383 {
 384         enum iwl_mcc_source used_src;
 385         struct ieee80211_regdomain *regd;
 386         int ret;
 387         bool changed;
 388         const struct ieee80211_regdomain *r =
 389                         rtnl_dereference(mvm->hw->wiphy->regd);
 390
 391         if (!r)
 392                 return -ENOENT;
 393
 394         /* save the last source in case we overwrite it below */
 395         used_src = mvm->mcc_src;
 396         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 397                 /* Notify the firmware we support wifi location updates */
 398                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 399                 if (!IS_ERR_OR_NULL(regd))
 400                         kfree(regd);
 401         }
 402
 403         /* Now set our last stored MCC and source */
 404         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 405                                      &changed);
 406         if (IS_ERR_OR_NULL(regd))
 407                 return -EIO;
 408
 409         /* update cfg80211 if the regdomain was changed */
 410         if (changed)
 411                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 412         else
 413                 ret = 0;
 414
 415         kfree(regd);
 416         return ret;
 417 }
 418
 419 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 420 {
 421         struct ieee80211_hw *hw = mvm->hw;
 422         int num_mac, ret, i;
 423         static const u32 mvm_ciphers[] = {
 424                 WLAN_CIPHER_SUITE_WEP40,
 425                 WLAN_CIPHER_SUITE_WEP104,
 426                 WLAN_CIPHER_SUITE_TKIP,
 427                 WLAN_CIPHER_SUITE_CCMP,
 428         };
 429
 430         /* Tell mac80211 our characteristics */
 431         ieee80211_hw_set(hw, SIGNAL_DBM);
 432         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 433         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 434         ieee80211_hw_set(hw, QUEUE_CONTROL);
 435         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 436         ieee80211_hw_set(hw, SUPPORTS_PS);
 437         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 438         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 439         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 440         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 441         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 442         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 443         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 444         ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 445         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
 446         if (iwl_mvm_has_new_rx_api(mvm))
 447                 ieee80211_hw_set(hw, SUPPORTS_REORDERING_BUFFER);
 448
 449         if (mvm->trans->num_rx_queues > 1)
 450                 ieee80211_hw_set(hw, USES_RSS);
 451
 452         if (mvm->trans->max_skb_frags)
 453                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 454
 455         if (!iwl_mvm_is_dqa_supported(mvm))
 456                 hw->queues = mvm->first_agg_queue;
 457         else
 458                 hw->queues = IEEE80211_MAX_QUEUES;
 459         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 460         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 461                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 462         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 463                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 464         hw->rate_control_algorithm = "iwl-mvm-rs";
 465         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 466         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 467
 468         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 6);
 469         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 470         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 471         hw->wiphy->cipher_suites = mvm->ciphers;
 472
 473         if (iwl_mvm_has_new_rx_api(mvm)) {
 474                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 475                         WLAN_CIPHER_SUITE_GCMP;
 476                 hw->wiphy->n_cipher_suites++;
 477                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 478                         WLAN_CIPHER_SUITE_GCMP_256;
 479                 hw->wiphy->n_cipher_suites++;
 480         }
 481
 482         /*
 483          * Enable 11w if advertised by firmware and software crypto
 484          * is not enabled (as the firmware will interpret some mgmt
 485          * packets, so enabling it with software crypto isn't safe)
 486          */
 487         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 488             !iwlwifi_mod_params.sw_crypto) {
 489                 ieee80211_hw_set(hw, MFP_CAPABLE);
 490                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 491                         WLAN_CIPHER_SUITE_AES_CMAC;
 492                 hw->wiphy->n_cipher_suites++;
 493                 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         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 551                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 552
 553         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 554
 555         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 556         hw->wiphy->n_iface_combinations =
 557                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 558
 559         hw->wiphy->max_remain_on_channel_duration = 10000;
 560         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 561         /* we can compensate an offset of up to 3 channels = 15 MHz */
 562         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 563
 564         /* Extract MAC address */
 565         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 566         hw->wiphy->addresses = mvm->addresses;
 567         hw->wiphy->n_addresses = 1;
 568
 569         /* Extract additional MAC addresses if available */
 570         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 571                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 572
 573         for (i = 1; i < num_mac; i++) {
 574                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 575                        ETH_ALEN);
 576                 mvm->addresses[i].addr[5]++;
 577                 hw->wiphy->n_addresses++;
 578         }
 579
 580         iwl_mvm_reset_phy_ctxts(mvm);
 581
 582         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 583
 584         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 585
 586         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 587         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 588                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 589
 590         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 591                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 592         else
 593                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 594
 595         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 596                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 597                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 598         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 599                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 600                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 601
 602                 if (fw_has_capa(&mvm->fw->ucode_capa,
 603                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 604                     fw_has_api(&mvm->fw->ucode_capa,
 605                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 606                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 607                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 608         }
 609
 610         hw->wiphy->hw_version = mvm->trans->hw_id;
 611
 612         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 613                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 614         else
 615                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 616
 617         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 618         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 619         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 620         /* we create the 802.11 header and zero length SSID IE. */
 621         hw->wiphy->max_sched_scan_ie_len =
 622                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 623         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 624         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 625
 626         /*
 627          * the firmware uses u8 for num of iterations, but 0xff is saved for
 628          * infinite loop, so the maximum number of iterations is actually 254.
 629          */
 630         hw->wiphy->max_sched_scan_plan_iterations = 254;
 631
 632         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 633                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 634                                NL80211_FEATURE_P2P_GO_OPPPS |
 635                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
 636                                NL80211_FEATURE_DYNAMIC_SMPS |
 637                                NL80211_FEATURE_STATIC_SMPS |
 638                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 639
 640         if (fw_has_capa(&mvm->fw->ucode_capa,
 641                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 642                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 643         if (fw_has_capa(&mvm->fw->ucode_capa,
 644                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 645                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 646
 647         if (fw_has_capa(&mvm->fw->ucode_capa,
 648                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 649                 hw->wiphy->features |=
 650                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 651
 652         if (fw_has_capa(&mvm->fw->ucode_capa,
 653                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 654                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 655
 656         if (fw_has_api(&mvm->fw->ucode_capa,
 657                        IWL_UCODE_TLV_API_SCAN_TSF_REPORT)) {
 658                 wiphy_ext_feature_set(hw->wiphy,
 659                                       NL80211_EXT_FEATURE_SCAN_START_TIME);
 660                 wiphy_ext_feature_set(hw->wiphy,
 661                                       NL80211_EXT_FEATURE_BSS_PARENT_TSF);
 662                 wiphy_ext_feature_set(hw->wiphy,
 663                                       NL80211_EXT_FEATURE_SET_SCAN_DWELL);
 664         }
 665
 666         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 667
 668 #ifdef CONFIG_PM_SLEEP
 669         if (iwl_mvm_is_d0i3_supported(mvm) &&
 670             device_can_wakeup(mvm->trans->dev)) {
 671                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 672                 hw->wiphy->wowlan = &mvm->wowlan;
 673         }
 674
 675         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 676             mvm->trans->ops->d3_suspend &&
 677             mvm->trans->ops->d3_resume &&
 678             device_can_wakeup(mvm->trans->dev)) {
 679                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 680                                      WIPHY_WOWLAN_DISCONNECT |
 681                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 682                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 683                                      WIPHY_WOWLAN_NET_DETECT;
 684                 if (!iwlwifi_mod_params.sw_crypto)
 685                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 686                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 687                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 688
 689                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 690                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 691                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 692                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 693                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 694                 hw->wiphy->wowlan = &mvm->wowlan;
 695         }
 696 #endif
 697
 698 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 699         /* assign default bcast filtering configuration */
 700         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 701 #endif
 702
 703         ret = iwl_mvm_leds_init(mvm);
 704         if (ret)
 705                 return ret;
 706
 707         if (fw_has_capa(&mvm->fw->ucode_capa,
 708                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 709                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 710                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 711                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 712         }
 713
 714         if (fw_has_capa(&mvm->fw->ucode_capa,
 715                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 716                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 717                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 718         }
 719
 720         hw->netdev_features |= mvm->cfg->features;
 721         if (!iwl_mvm_is_csum_supported(mvm)) {
 722                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 723                                          NETIF_F_RXCSUM);
 724                 /* We may support SW TX CSUM */
 725                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 726                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 727         }
 728
 729         ret = ieee80211_register_hw(mvm->hw);
 730         if (ret)
 731                 iwl_mvm_leds_exit(mvm);
 732
 733         if (mvm->cfg->vht_mu_mimo_supported)
 734                 wiphy_ext_feature_set(hw->wiphy,
 735                                       NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER);
 736
 737         return ret;
 738 }
 739
 740 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 741                              struct ieee80211_sta *sta,
 742                              struct sk_buff *skb)
 743 {
 744         struct iwl_mvm_sta *mvmsta;
 745         bool defer = false;
 746
 747         /*
 748          * double check the IN_D0I3 flag both before and after
 749          * taking the spinlock, in order to prevent taking
 750          * the spinlock when not needed.
 751          */
 752         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 753                 return false;
 754
 755         spin_lock(&mvm->d0i3_tx_lock);
 756         /*
 757          * testing the flag again ensures the skb dequeue
 758          * loop (on d0i3 exit) hasn't run yet.
 759          */
 760         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 761                 goto out;
 762
 763         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 764         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 765             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 766                 goto out;
 767
 768         __skb_queue_tail(&mvm->d0i3_tx, skb);
 769         ieee80211_stop_queues(mvm->hw);
 770
 771         /* trigger wakeup */
 772         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 773         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 774
 775         defer = true;
 776 out:
 777         spin_unlock(&mvm->d0i3_tx_lock);
 778         return defer;
 779 }
 780
 781 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 782                            struct ieee80211_tx_control *control,
 783                            struct sk_buff *skb)
 784 {
 785         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 786         struct ieee80211_sta *sta = control->sta;
 787         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 788         struct ieee80211_hdr *hdr = (void *)skb->data;
 789
 790         if (iwl_mvm_is_radio_killed(mvm)) {
 791                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 792                 goto drop;
 793         }
 794
 795         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 796             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 797             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 798                 goto drop;
 799
 800         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 801         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 802                      ieee80211_is_mgmt(hdr->frame_control) &&
 803                      !ieee80211_is_deauth(hdr->frame_control) &&
 804                      !ieee80211_is_disassoc(hdr->frame_control) &&
 805                      !ieee80211_is_action(hdr->frame_control)))
 806                 sta = NULL;
 807
 808         if (sta) {
 809                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 810                         return;
 811                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 812                         goto drop;
 813                 return;
 814         }
 815
 816         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 817                 goto drop;
 818         return;
 819  drop:
 820         ieee80211_free_txskb(hw, skb);
 821 }
 822
 823 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 824 {
 825         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 826                 return false;
 827         return true;
 828 }
 829
 830 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 831 {
 832         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 833                 return false;
 834         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 835                 return true;
 836
 837         /* enabled by default */
 838         return true;
 839 }
 840
 841 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 842         do {                                                    \
 843                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 844                         break;                                  \
 845                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 846         } while (0)
 847
 848 static void
 849 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 850                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 851                             enum ieee80211_ampdu_mlme_action action)
 852 {
 853         struct iwl_fw_dbg_trigger_tlv *trig;
 854         struct iwl_fw_dbg_trigger_ba *ba_trig;
 855
 856         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 857                 return;
 858
 859         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 860         ba_trig = (void *)trig->data;
 861
 862         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 863                 return;
 864
 865         switch (action) {
 866         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 867                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 868                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 869
 870                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 871                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 872                                  sta->addr, tid, tid_data->ssn);
 873                 break;
 874                 }
 875         case IEEE80211_AMPDU_TX_STOP_CONT:
 876                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 877                                  "TX AGG STOP: MAC %pM tid %d\n",
 878                                  sta->addr, tid);
 879                 break;
 880         case IEEE80211_AMPDU_RX_START:
 881                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 882                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 883                                  sta->addr, tid, rx_ba_ssn);
 884                 break;
 885         case IEEE80211_AMPDU_RX_STOP:
 886                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 887                                  "RX AGG STOP: MAC %pM tid %d\n",
 888                                  sta->addr, tid);
 889                 break;
 890         default:
 891                 break;
 892         }
 893 }
 894
 895 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 896                                     struct ieee80211_vif *vif,
 897                                     struct ieee80211_ampdu_params *params)
 898 {
 899         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 900         int ret;
 901         bool tx_agg_ref = false;
 902         struct ieee80211_sta *sta = params->sta;
 903         enum ieee80211_ampdu_mlme_action action = params->action;
 904         u16 tid = params->tid;
 905         u16 *ssn = &params->ssn;
 906         u8 buf_size = params->buf_size;
 907         bool amsdu = params->amsdu;
 908         u16 timeout = params->timeout;
 909
 910         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 911                      sta->addr, tid, action);
 912
 913         if (!(mvm->nvm_data->sku_cap_11n_enable))
 914                 return -EACCES;
 915
 916         /* return from D0i3 before starting a new Tx aggregation */
 917         switch (action) {
 918         case IEEE80211_AMPDU_TX_START:
 919         case IEEE80211_AMPDU_TX_STOP_CONT:
 920         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 921         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 922         case IEEE80211_AMPDU_TX_OPERATIONAL:
 923                 /*
 924                  * for tx start, wait synchronously until D0i3 exit to
 925                  * get the correct sequence number for the tid.
 926                  * additionally, some other ampdu actions use direct
 927                  * target access, which is not handled automatically
 928                  * by the trans layer (unlike commands), so wait for
 929                  * d0i3 exit in these cases as well.
 930                  */
 931                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 932                 if (ret)
 933                         return ret;
 934
 935                 tx_agg_ref = true;
 936                 break;
 937         default:
 938                 break;
 939         }
 940
 941         mutex_lock(&mvm->mutex);
 942
 943         switch (action) {
 944         case IEEE80211_AMPDU_RX_START:
 945                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 946                         ret = -EINVAL;
 947                         break;
 948                 }
 949                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 950                                          timeout);
 951                 break;
 952         case IEEE80211_AMPDU_RX_STOP:
 953                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 954                                          timeout);
 955                 break;
 956         case IEEE80211_AMPDU_TX_START:
 957                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 958                         ret = -EINVAL;
 959                         break;
 960                 }
 961                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 962                 break;
 963         case IEEE80211_AMPDU_TX_STOP_CONT:
 964                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 965                 break;
 966         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 967         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 968                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 969                 break;
 970         case IEEE80211_AMPDU_TX_OPERATIONAL:
 971                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 972                                               buf_size, amsdu);
 973                 break;
 974         default:
 975                 WARN_ON_ONCE(1);
 976                 ret = -EINVAL;
 977                 break;
 978         }
 979
 980         if (!ret) {
 981                 u16 rx_ba_ssn = 0;
 982
 983                 if (action == IEEE80211_AMPDU_RX_START)
 984                         rx_ba_ssn = *ssn;
 985
 986                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 987                                             rx_ba_ssn, action);
 988         }
 989         mutex_unlock(&mvm->mutex);
 990
 991         /*
 992          * If the tid is marked as started, we won't use it for offloaded
 993          * traffic on the next D0i3 entry. It's safe to unref.
 994          */
 995         if (tx_agg_ref)
 996                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 997
 998         return ret;
 999 }
1000
1001 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
1002                                      struct ieee80211_vif *vif)
1003 {
1004         struct iwl_mvm *mvm = data;
1005         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1006
1007         mvmvif->uploaded = false;
1008         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1009
1010         spin_lock_bh(&mvm->time_event_lock);
1011         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
1012         spin_unlock_bh(&mvm->time_event_lock);
1013
1014         mvmvif->phy_ctxt = NULL;
1015         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
1016 }
1017
1018 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1019 {
1020         /* clear the D3 reconfig, we only need it to avoid dumping a
1021          * firmware coredump on reconfiguration, we shouldn't do that
1022          * on D3->D0 transition
1023          */
1024         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1025                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1026                 iwl_mvm_fw_error_dump(mvm);
1027         }
1028
1029         /* cleanup all stale references (scan, roc), but keep the
1030          * ucode_down ref until reconfig is complete
1031          */
1032         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1033
1034         iwl_mvm_stop_device(mvm);
1035
1036         mvm->scan_status = 0;
1037         mvm->ps_disabled = false;
1038         mvm->calibrating = false;
1039
1040         /* just in case one was running */
1041         iwl_mvm_cleanup_roc_te(mvm);
1042         ieee80211_remain_on_channel_expired(mvm->hw);
1043
1044         /*
1045          * cleanup all interfaces, even inactive ones, as some might have
1046          * gone down during the HW restart
1047          */
1048         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1049
1050         mvm->p2p_device_vif = NULL;
1051         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1052
1053         iwl_mvm_reset_phy_ctxts(mvm);
1054         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1055         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1056         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1057         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1058         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1059         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1060
1061         ieee80211_wake_queues(mvm->hw);
1062
1063         /* clear any stale d0i3 state */
1064         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1065
1066         mvm->vif_count = 0;
1067         mvm->rx_ba_sessions = 0;
1068         mvm->fw_dbg_conf = FW_DBG_INVALID;
1069
1070         /* keep statistics ticking */
1071         iwl_mvm_accu_radio_stats(mvm);
1072 }
1073
1074 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1075 {
1076         int ret;
1077
1078         lockdep_assert_held(&mvm->mutex);
1079
1080         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1081                 /* Clean up some internal and mac80211 state on restart */
1082                 iwl_mvm_restart_cleanup(mvm);
1083         } else {
1084                 /* Hold the reference to prevent runtime suspend while
1085                  * the start procedure runs.  It's a bit confusing
1086                  * that the UCODE_DOWN reference is taken, but it just
1087                  * means "UCODE is not UP yet". ( TODO: rename this
1088                  * reference).
1089                  */
1090                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1091         }
1092         ret = iwl_mvm_up(mvm);
1093
1094         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1095                 /* Something went wrong - we need to finish some cleanup
1096                  * that normally iwl_mvm_mac_restart_complete() below
1097                  * would do.
1098                  */
1099                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1100                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1101         }
1102
1103         return ret;
1104 }
1105
1106 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1107 {
1108         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1109         int ret;
1110
1111         /* Some hw restart cleanups must not hold the mutex */
1112         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1113                 /*
1114                  * Make sure we are out of d0i3. This is needed
1115                  * to make sure the reference accounting is correct
1116                  * (and there is no stale d0i3_exit_work).
1117                  */
1118                 wait_event_timeout(mvm->d0i3_exit_waitq,
1119                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1120                                              &mvm->status),
1121                                    HZ);
1122         }
1123
1124         mutex_lock(&mvm->mutex);
1125         ret = __iwl_mvm_mac_start(mvm);
1126         mutex_unlock(&mvm->mutex);
1127
1128         return ret;
1129 }
1130
1131 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1132 {
1133         int ret;
1134
1135         mutex_lock(&mvm->mutex);
1136
1137         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1138         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1139         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1140         if (ret)
1141                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1142                         ret);
1143
1144         /* allow transport/FW low power modes */
1145         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1146
1147         /*
1148          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1149          * of packets the FW sent out, so we must reconnect.
1150          */
1151         iwl_mvm_teardown_tdls_peers(mvm);
1152
1153         mutex_unlock(&mvm->mutex);
1154 }
1155
1156 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1157 {
1158         if (iwl_mvm_is_d0i3_supported(mvm) &&
1159             iwl_mvm_enter_d0i3_on_suspend(mvm))
1160                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1161                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1162                                                         &mvm->status),
1163                                               HZ),
1164                           "D0i3 exit on resume timed out\n");
1165 }
1166
1167 static void
1168 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1169                               enum ieee80211_reconfig_type reconfig_type)
1170 {
1171         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1172
1173         switch (reconfig_type) {
1174         case IEEE80211_RECONFIG_TYPE_RESTART:
1175                 iwl_mvm_restart_complete(mvm);
1176                 break;
1177         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1178                 iwl_mvm_resume_complete(mvm);
1179                 break;
1180         }
1181 }
1182
1183 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1184 {
1185         lockdep_assert_held(&mvm->mutex);
1186
1187         /* firmware counters are obviously reset now, but we shouldn't
1188          * partially track so also clear the fw_reset_accu counters.
1189          */
1190         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1191
1192         /* async_handlers_wk is now blocked */
1193
1194         /*
1195          * The work item could be running or queued if the
1196          * ROC time event stops just as we get here.
1197          */
1198         flush_work(&mvm->roc_done_wk);
1199
1200         iwl_mvm_stop_device(mvm);
1201
1202         iwl_mvm_async_handlers_purge(mvm);
1203         /* async_handlers_list is empty and will stay empty: HW is stopped */
1204
1205         /* the fw is stopped, the aux sta is dead: clean up driver state */
1206         iwl_mvm_del_aux_sta(mvm);
1207
1208         iwl_free_fw_paging(mvm);
1209
1210         /*
1211          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1212          * won't be called in this case).
1213          * But make sure to cleanup interfaces that have gone down before/during
1214          * HW restart was requested.
1215          */
1216         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1217                 ieee80211_iterate_interfaces(mvm->hw, 0,
1218                                              iwl_mvm_cleanup_iterator, mvm);
1219
1220         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1221          * make sure there's nothing left there and warn if any is found.
1222          */
1223         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1224                 int i;
1225
1226                 for (i = 0; i < mvm->max_scans; i++) {
1227                         if (WARN_ONCE(mvm->scan_uid_status[i],
1228                                       "UMAC scan UID %d status was not cleaned\n",
1229                                       i))
1230                                 mvm->scan_uid_status[i] = 0;
1231                 }
1232         }
1233 }
1234
1235 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1236 {
1237         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1238
1239         flush_work(&mvm->d0i3_exit_work);
1240         flush_work(&mvm->async_handlers_wk);
1241         flush_work(&mvm->add_stream_wk);
1242         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1243         cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork);
1244         cancel_delayed_work_sync(&mvm->scan_timeout_dwork);
1245         iwl_mvm_free_fw_dump_desc(mvm);
1246
1247         mutex_lock(&mvm->mutex);
1248         __iwl_mvm_mac_stop(mvm);
1249         mutex_unlock(&mvm->mutex);
1250
1251         /*
1252          * The worker might have been waiting for the mutex, let it run and
1253          * discover that its list is now empty.
1254          */
1255         cancel_work_sync(&mvm->async_handlers_wk);
1256 }
1257
1258 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1259 {
1260         u16 i;
1261
1262         lockdep_assert_held(&mvm->mutex);
1263
1264         for (i = 0; i < NUM_PHY_CTX; i++)
1265                 if (!mvm->phy_ctxts[i].ref)
1266                         return &mvm->phy_ctxts[i];
1267
1268         IWL_ERR(mvm, "No available PHY context\n");
1269         return NULL;
1270 }
1271
1272 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1273                                 s16 tx_power)
1274 {
1275         struct iwl_dev_tx_power_cmd cmd = {
1276                 .v3.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1277                 .v3.v2.mac_context_id =
1278                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1279                 .v3.v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1280         };
1281         int len = sizeof(cmd);
1282
1283         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1284                 cmd.v3.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1285
1286         if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK))
1287                 len = sizeof(cmd.v3);
1288         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1289                 len = sizeof(cmd.v3.v2);
1290
1291         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1292 }
1293
1294 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1295                                      struct ieee80211_vif *vif)
1296 {
1297         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1298         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1299         int ret;
1300
1301         mvmvif->mvm = mvm;
1302
1303         /*
1304          * make sure D0i3 exit is completed, otherwise a target access
1305          * during tx queue configuration could be done when still in
1306          * D0i3 state.
1307          */
1308         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1309         if (ret)
1310                 return ret;
1311
1312         /*
1313          * Not much to do here. The stack will not allow interface
1314          * types or combinations that we didn't advertise, so we
1315          * don't really have to check the types.
1316          */
1317
1318         mutex_lock(&mvm->mutex);
1319
1320         /* make sure that beacon statistics don't go backwards with FW reset */
1321         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1322                 mvmvif->beacon_stats.accu_num_beacons +=
1323                         mvmvif->beacon_stats.num_beacons;
1324
1325         /* Allocate resources for the MAC context, and add it to the fw  */
1326         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1327         if (ret)
1328                 goto out_unlock;
1329
1330         /* Counting number of interfaces is needed for legacy PM */
1331         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1332                 mvm->vif_count++;
1333
1334         /*
1335          * The AP binding flow can be done only after the beacon
1336          * template is configured (which happens only in the mac80211
1337          * start_ap() flow), and adding the broadcast station can happen
1338          * only after the binding.
1339          * In addition, since modifying the MAC before adding a bcast
1340          * station is not allowed by the FW, delay the adding of MAC context to
1341          * the point where we can also add the bcast station.
1342          * In short: there's not much we can do at this point, other than
1343          * allocating resources :)
1344          */
1345         if (vif->type == NL80211_IFTYPE_AP ||
1346             vif->type == NL80211_IFTYPE_ADHOC) {
1347                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1348                 if (ret) {
1349                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1350                         goto out_release;
1351                 }
1352
1353                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1354                 goto out_unlock;
1355         }
1356
1357         mvmvif->features |= hw->netdev_features;
1358
1359         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1360         if (ret)
1361                 goto out_release;
1362
1363         ret = iwl_mvm_power_update_mac(mvm);
1364         if (ret)
1365                 goto out_remove_mac;
1366
1367         /* beacon filtering */
1368         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1369         if (ret)
1370                 goto out_remove_mac;
1371
1372         if (!mvm->bf_allowed_vif &&
1373             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1374                 mvm->bf_allowed_vif = mvmvif;
1375                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1376                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1377         }
1378
1379         /*
1380          * P2P_DEVICE interface does not have a channel context assigned to it,
1381          * so a dedicated PHY context is allocated to it and the corresponding
1382          * MAC context is bound to it at this stage.
1383          */
1384         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1385
1386                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1387                 if (!mvmvif->phy_ctxt) {
1388                         ret = -ENOSPC;
1389                         goto out_free_bf;
1390                 }
1391
1392                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1393                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1394                 if (ret)
1395                         goto out_unref_phy;
1396
1397                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1398                 if (ret)
1399                         goto out_unbind;
1400
1401                 /* Save a pointer to p2p device vif, so it can later be used to
1402                  * update the p2p device MAC when a GO is started/stopped */
1403                 mvm->p2p_device_vif = vif;
1404         }
1405
1406         iwl_mvm_vif_dbgfs_register(mvm, vif);
1407         goto out_unlock;
1408
1409  out_unbind:
1410         iwl_mvm_binding_remove_vif(mvm, vif);
1411  out_unref_phy:
1412         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1413  out_free_bf:
1414         if (mvm->bf_allowed_vif == mvmvif) {
1415                 mvm->bf_allowed_vif = NULL;
1416                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1417                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1418         }
1419  out_remove_mac:
1420         mvmvif->phy_ctxt = NULL;
1421         iwl_mvm_mac_ctxt_remove(mvm, vif);
1422  out_release:
1423         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1424                 mvm->vif_count--;
1425
1426         iwl_mvm_mac_ctxt_release(mvm, vif);
1427  out_unlock:
1428         mutex_unlock(&mvm->mutex);
1429
1430         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1431
1432         return ret;
1433 }
1434
1435 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1436                                         struct ieee80211_vif *vif)
1437 {
1438         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1439
1440         if (tfd_msk) {
1441                 /*
1442                  * mac80211 first removes all the stations of the vif and
1443                  * then removes the vif. When it removes a station it also
1444                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1445                  * of all the stations of this vif are closed, and the queues
1446                  * of these AMPDU sessions are properly closed.
1447                  * We still need to take care of the shared queues of the vif.
1448                  * Flush them here.
1449                  */
1450                 mutex_lock(&mvm->mutex);
1451                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1452                 mutex_unlock(&mvm->mutex);
1453
1454                 /*
1455                  * There are transports that buffer a few frames in the host.
1456                  * For these, the flush above isn't enough since while we were
1457                  * flushing, the transport might have sent more frames to the
1458                  * device. To solve this, wait here until the transport is
1459                  * empty. Technically, this could have replaced the flush
1460                  * above, but flush is much faster than draining. So flush
1461                  * first, and drain to make sure we have no frames in the
1462                  * transport anymore.
1463                  * If a station still had frames on the shared queues, it is
1464                  * already marked as draining, so to complete the draining, we
1465                  * just need to wait until the transport is empty.
1466                  */
1467                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1468         }
1469
1470         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1471                 /*
1472                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1473                  * We assume here that all the packets sent to the OFFCHANNEL
1474                  * queue are sent in ROC session.
1475                  */
1476                 flush_work(&mvm->roc_done_wk);
1477         } else {
1478                 /*
1479                  * By now, all the AC queues are empty. The AGG queues are
1480                  * empty too. We already got all the Tx responses for all the
1481                  * packets in the queues. The drain work can have been
1482                  * triggered. Flush it.
1483                  */
1484                 flush_work(&mvm->sta_drained_wk);
1485         }
1486 }
1487
1488 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1489                                          struct ieee80211_vif *vif)
1490 {
1491         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1492         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1493
1494         iwl_mvm_prepare_mac_removal(mvm, vif);
1495
1496         mutex_lock(&mvm->mutex);
1497
1498         if (mvm->bf_allowed_vif == mvmvif) {
1499                 mvm->bf_allowed_vif = NULL;
1500                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1501                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1502         }
1503
1504         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1505
1506         /*
1507          * For AP/GO interface, the tear down of the resources allocated to the
1508          * interface is be handled as part of the stop_ap flow.
1509          */
1510         if (vif->type == NL80211_IFTYPE_AP ||
1511             vif->type == NL80211_IFTYPE_ADHOC) {
1512 #ifdef CONFIG_NL80211_TESTMODE
1513                 if (vif == mvm->noa_vif) {
1514                         mvm->noa_vif = NULL;
1515                         mvm->noa_duration = 0;
1516                 }
1517 #endif
1518                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1519                 goto out_release;
1520         }
1521
1522         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1523                 mvm->p2p_device_vif = NULL;
1524                 iwl_mvm_rm_bcast_sta(mvm, vif);
1525                 iwl_mvm_binding_remove_vif(mvm, vif);
1526                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1527                 mvmvif->phy_ctxt = NULL;
1528         }
1529
1530         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1531                 mvm->vif_count--;
1532
1533         iwl_mvm_power_update_mac(mvm);
1534         iwl_mvm_mac_ctxt_remove(mvm, vif);
1535
1536 out_release:
1537         iwl_mvm_mac_ctxt_release(mvm, vif);
1538         mutex_unlock(&mvm->mutex);
1539 }
1540
1541 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1542 {
1543         return 0;
1544 }
1545
1546 struct iwl_mvm_mc_iter_data {
1547         struct iwl_mvm *mvm;
1548         int port_id;
1549 };
1550
1551 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1552                                       struct ieee80211_vif *vif)
1553 {
1554         struct iwl_mvm_mc_iter_data *data = _data;
1555         struct iwl_mvm *mvm = data->mvm;
1556         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1557         int ret, len;
1558
1559         /* if we don't have free ports, mcast frames will be dropped */
1560         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1561                 return;
1562
1563         if (vif->type != NL80211_IFTYPE_STATION ||
1564             !vif->bss_conf.assoc)
1565                 return;
1566
1567         cmd->port_id = data->port_id++;
1568         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1569         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1570
1571         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1572         if (ret)
1573                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1574 }
1575
1576 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1577 {
1578         struct iwl_mvm_mc_iter_data iter_data = {
1579                 .mvm = mvm,
1580         };
1581
1582         lockdep_assert_held(&mvm->mutex);
1583
1584         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1585                 return;
1586
1587         ieee80211_iterate_active_interfaces_atomic(
1588                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1589                 iwl_mvm_mc_iface_iterator, &iter_data);
1590 }
1591
1592 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1593                                      struct netdev_hw_addr_list *mc_list)
1594 {
1595         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1596         struct iwl_mcast_filter_cmd *cmd;
1597         struct netdev_hw_addr *addr;
1598         int addr_count;
1599         bool pass_all;
1600         int len;
1601
1602         addr_count = netdev_hw_addr_list_count(mc_list);
1603         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1604                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1605         if (pass_all)
1606                 addr_count = 0;
1607
1608         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1609         cmd = kzalloc(len, GFP_ATOMIC);
1610         if (!cmd)
1611                 return 0;
1612
1613         if (pass_all) {
1614                 cmd->pass_all = 1;
1615                 return (u64)(unsigned long)cmd;
1616         }
1617
1618         netdev_hw_addr_list_for_each(addr, mc_list) {
1619                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1620                                    cmd->count, addr->addr);
1621                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1622                        addr->addr, ETH_ALEN);
1623                 cmd->count++;
1624         }
1625
1626         return (u64)(unsigned long)cmd;
1627 }
1628
1629 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1630                                      unsigned int changed_flags,
1631                                      unsigned int *total_flags,
1632                                      u64 multicast)
1633 {
1634         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1635         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1636
1637         mutex_lock(&mvm->mutex);
1638
1639         /* replace previous configuration */
1640         kfree(mvm->mcast_filter_cmd);
1641         mvm->mcast_filter_cmd = cmd;
1642
1643         if (!cmd)
1644                 goto out;
1645
1646         iwl_mvm_recalc_multicast(mvm);
1647 out:
1648         mutex_unlock(&mvm->mutex);
1649         *total_flags = 0;
1650 }
1651
1652 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1653                                         struct ieee80211_vif *vif,
1654                                         unsigned int filter_flags,
1655                                         unsigned int changed_flags)
1656 {
1657         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1658
1659         /* We support only filter for probe requests */
1660         if (!(changed_flags & FIF_PROBE_REQ))
1661                 return;
1662
1663         /* Supported only for p2p client interfaces */
1664         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1665             !vif->p2p)
1666                 return;
1667
1668         mutex_lock(&mvm->mutex);
1669         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1670         mutex_unlock(&mvm->mutex);
1671 }
1672
1673 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1674 struct iwl_bcast_iter_data {
1675         struct iwl_mvm *mvm;
1676         struct iwl_bcast_filter_cmd *cmd;
1677         u8 current_filter;
1678 };
1679
1680 static void
1681 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1682                          const struct iwl_fw_bcast_filter *in_filter,
1683                          struct iwl_fw_bcast_filter *out_filter)
1684 {
1685         struct iwl_fw_bcast_filter_attr *attr;
1686         int i;
1687
1688         memcpy(out_filter, in_filter, sizeof(*out_filter));
1689
1690         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1691                 attr = &out_filter->attrs[i];
1692
1693                 if (!attr->mask)
1694                         break;
1695
1696                 switch (attr->reserved1) {
1697                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1698                         if (vif->bss_conf.arp_addr_cnt != 1) {
1699                                 attr->mask = 0;
1700                                 continue;
1701                         }
1702
1703                         attr->val = vif->bss_conf.arp_addr_list[0];
1704                         break;
1705                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1706                         attr->val = *(__be32 *)&vif->addr[2];
1707                         break;
1708                 default:
1709                         break;
1710                 }
1711                 attr->reserved1 = 0;
1712                 out_filter->num_attrs++;
1713         }
1714 }
1715
1716 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1717                                           struct ieee80211_vif *vif)
1718 {
1719         struct iwl_bcast_iter_data *data = _data;
1720         struct iwl_mvm *mvm = data->mvm;
1721         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1722         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1723         struct iwl_fw_bcast_mac *bcast_mac;
1724         int i;
1725
1726         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1727                 return;
1728
1729         bcast_mac = &cmd->macs[mvmvif->id];
1730
1731         /*
1732          * enable filtering only for associated stations, but not for P2P
1733          * Clients
1734          */
1735         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1736             !vif->bss_conf.assoc)
1737                 return;
1738
1739         bcast_mac->default_discard = 1;
1740
1741         /* copy all configured filters */
1742         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1743                 /*
1744                  * Make sure we don't exceed our filters limit.
1745                  * if there is still a valid filter to be configured,
1746                  * be on the safe side and just allow bcast for this mac.
1747                  */
1748                 if (WARN_ON_ONCE(data->current_filter >=
1749                                  ARRAY_SIZE(cmd->filters))) {
1750                         bcast_mac->default_discard = 0;
1751                         bcast_mac->attached_filters = 0;
1752                         break;
1753                 }
1754
1755                 iwl_mvm_set_bcast_filter(vif,
1756                                          &mvm->bcast_filters[i],
1757                                          &cmd->filters[data->current_filter]);
1758
1759                 /* skip current filter if it contains no attributes */
1760                 if (!cmd->filters[data->current_filter].num_attrs)
1761                         continue;
1762
1763                 /* attach the filter to current mac */
1764                 bcast_mac->attached_filters |=
1765                                 cpu_to_le16(BIT(data->current_filter));
1766
1767                 data->current_filter++;
1768         }
1769 }
1770
1771 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1772                                     struct iwl_bcast_filter_cmd *cmd)
1773 {
1774         struct iwl_bcast_iter_data iter_data = {
1775                 .mvm = mvm,
1776                 .cmd = cmd,
1777         };
1778
1779         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1780                 return false;
1781
1782         memset(cmd, 0, sizeof(*cmd));
1783         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1784         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1785
1786 #ifdef CONFIG_IWLWIFI_DEBUGFS
1787         /* use debugfs filters/macs if override is configured */
1788         if (mvm->dbgfs_bcast_filtering.override) {
1789                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1790                        sizeof(cmd->filters));
1791                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1792                        sizeof(cmd->macs));
1793                 return true;
1794         }
1795 #endif
1796
1797         /* if no filters are configured, do nothing */
1798         if (!mvm->bcast_filters)
1799                 return false;
1800
1801         /* configure and attach these filters for each associated sta vif */
1802         ieee80211_iterate_active_interfaces(
1803                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1804                 iwl_mvm_bcast_filter_iterator, &iter_data);
1805
1806         return true;
1807 }
1808
1809 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1810 {
1811         struct iwl_bcast_filter_cmd cmd;
1812
1813         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1814                 return 0;
1815
1816         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1817                 return 0;
1818
1819         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1820                                     sizeof(cmd), &cmd);
1821 }
1822 #else
1823 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1824 {
1825         return 0;
1826 }
1827 #endif
1828
1829 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1830                                     struct ieee80211_vif *vif)
1831 {
1832         struct iwl_mu_group_mgmt_cmd cmd = {};
1833
1834         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1835                WLAN_MEMBERSHIP_LEN);
1836         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1837                WLAN_USER_POSITION_LEN);
1838
1839         return iwl_mvm_send_cmd_pdu(mvm,
1840                                     WIDE_ID(DATA_PATH_GROUP,
1841                                             UPDATE_MU_GROUPS_CMD),
1842                                     0, sizeof(cmd), &cmd);
1843 }
1844
1845 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1846                                            struct ieee80211_vif *vif)
1847 {
1848         if (vif->mu_mimo_owner) {
1849                 struct iwl_mu_group_mgmt_notif *notif = _data;
1850
1851                 /*
1852                  * MU-MIMO Group Id action frame is little endian. We treat
1853                  * the data received from firmware as if it came from the
1854                  * action frame, so no conversion is needed.
1855                  */
1856                 ieee80211_update_mu_groups(vif,
1857                                            (u8 *)&notif->membership_status,
1858                                            (u8 *)&notif->user_position);
1859         }
1860 }
1861
1862 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1863                                struct iwl_rx_cmd_buffer *rxb)
1864 {
1865         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1866         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1867
1868         ieee80211_iterate_active_interfaces_atomic(
1869                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1870                         iwl_mvm_mu_mimo_iface_iterator, notif);
1871 }
1872
1873 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1874                                              struct ieee80211_vif *vif,
1875                                              struct ieee80211_bss_conf *bss_conf,
1876                                              u32 changes)
1877 {
1878         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1879         int ret;
1880
1881         /*
1882          * Re-calculate the tsf id, as the master-slave relations depend on the
1883          * beacon interval, which was not known when the station interface was
1884          * added.
1885          */
1886         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1887                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1888
1889         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1890             mvmvif->lqm_active)
1891                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1892                                      0, 0);
1893
1894         /*
1895          * If we're not associated yet, take the (new) BSSID before associating
1896          * so the firmware knows. If we're already associated, then use the old
1897          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1898          * branch for disassociation below.
1899          */
1900         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1901                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1902
1903         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1904         if (ret)
1905                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1906
1907         /* after sending it once, adopt mac80211 data */
1908         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1909         mvmvif->associated = bss_conf->assoc;
1910
1911         if (changes & BSS_CHANGED_ASSOC) {
1912                 if (bss_conf->assoc) {
1913                         /* clear statistics to get clean beacon counter */
1914                         iwl_mvm_request_statistics(mvm, true);
1915                         memset(&mvmvif->beacon_stats, 0,
1916                                sizeof(mvmvif->beacon_stats));
1917
1918                         /* add quota for this interface */
1919                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1920                         if (ret) {
1921                                 IWL_ERR(mvm, "failed to update quotas\n");
1922                                 return;
1923                         }
1924
1925                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1926                                      &mvm->status)) {
1927                                 /*
1928                                  * If we're restarting then the firmware will
1929                                  * obviously have lost synchronisation with
1930                                  * the AP. It will attempt to synchronise by
1931                                  * itself, but we can make it more reliable by
1932                                  * scheduling a session protection time event.
1933                                  *
1934                                  * The firmware needs to receive a beacon to
1935                                  * catch up with synchronisation, use 110% of
1936                                  * the beacon interval.
1937                                  *
1938                                  * Set a large maximum delay to allow for more
1939                                  * than a single interface.
1940                                  */
1941                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1942                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1943                                                         5 * dur, false);
1944                         }
1945
1946                         iwl_mvm_sf_update(mvm, vif, false);
1947                         iwl_mvm_power_vif_assoc(mvm, vif);
1948                         if (vif->p2p) {
1949                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1950                                 iwl_mvm_update_smps(mvm, vif,
1951                                                     IWL_MVM_SMPS_REQ_PROT,
1952                                                     IEEE80211_SMPS_DYNAMIC);
1953                         }
1954                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1955                         /*
1956                          * If update fails - SF might be running in associated
1957                          * mode while disassociated - which is forbidden.
1958                          */
1959                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1960                                   "Failed to update SF upon disassociation\n");
1961
1962                         /* remove AP station now that the MAC is unassoc */
1963                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1964                         if (ret)
1965                                 IWL_ERR(mvm, "failed to remove AP station\n");
1966
1967                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1968                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1969                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1970                         /* remove quota for this interface */
1971                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1972                         if (ret)
1973                                 IWL_ERR(mvm, "failed to update quotas\n");
1974
1975                         if (vif->p2p)
1976                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1977
1978                         /* this will take the cleared BSSID from bss_conf */
1979                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1980                         if (ret)
1981                                 IWL_ERR(mvm,
1982                                         "failed to update MAC %pM (clear after unassoc)\n",
1983                                         vif->addr);
1984                 }
1985
1986                 /*
1987                  * The firmware tracks the MU-MIMO group on its own.
1988                  * However, on HW restart we should restore this data.
1989                  */
1990                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1991                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1992                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1993                         if (ret)
1994                                 IWL_ERR(mvm,
1995                                         "failed to update VHT MU_MIMO groups\n");
1996                 }
1997
1998                 iwl_mvm_recalc_multicast(mvm);
1999                 iwl_mvm_configure_bcast_filter(mvm);
2000
2001                 /* reset rssi values */
2002                 mvmvif->bf_data.ave_beacon_signal = 0;
2003
2004                 iwl_mvm_bt_coex_vif_change(mvm);
2005                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2006                                     IEEE80211_SMPS_AUTOMATIC);
2007                 if (fw_has_capa(&mvm->fw->ucode_capa,
2008                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2009                         iwl_mvm_config_scan(mvm);
2010         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2011                 /*
2012                  * We received a beacon _after_ association so
2013                  * remove the session protection.
2014                  */
2015                 iwl_mvm_remove_time_event(mvm, mvmvif,
2016                                           &mvmvif->time_event_data);
2017         }
2018
2019         if (changes & BSS_CHANGED_BEACON_INFO) {
2020                 iwl_mvm_sf_update(mvm, vif, false);
2021                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2022         }
2023
2024         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
2025                        /*
2026                         * Send power command on every beacon change,
2027                         * because we may have not enabled beacon abort yet.
2028                         */
2029                        BSS_CHANGED_BEACON_INFO)) {
2030                 ret = iwl_mvm_power_update_mac(mvm);
2031                 if (ret)
2032                         IWL_ERR(mvm, "failed to update power mode\n");
2033         }
2034
2035         if (changes & BSS_CHANGED_TXPOWER) {
2036                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2037                                 bss_conf->txpower);
2038                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2039         }
2040
2041         if (changes & BSS_CHANGED_CQM) {
2042                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2043                 /* reset cqm events tracking */
2044                 mvmvif->bf_data.last_cqm_event = 0;
2045                 if (mvmvif->bf_data.bf_enabled) {
2046                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2047                         if (ret)
2048                                 IWL_ERR(mvm,
2049                                         "failed to update CQM thresholds\n");
2050                 }
2051         }
2052
2053         if (changes & BSS_CHANGED_ARP_FILTER) {
2054                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2055                 iwl_mvm_configure_bcast_filter(mvm);
2056         }
2057 }
2058
2059 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2060                                  struct ieee80211_vif *vif)
2061 {
2062         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2063         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2064         int ret;
2065
2066         /*
2067          * iwl_mvm_mac_ctxt_add() might read directly from the device
2068          * (the system time), so make sure it is available.
2069          */
2070         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2071         if (ret)
2072                 return ret;
2073
2074         mutex_lock(&mvm->mutex);
2075
2076         /* Send the beacon template */
2077         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2078         if (ret)
2079                 goto out_unlock;
2080
2081         /*
2082          * Re-calculate the tsf id, as the master-slave relations depend on the
2083          * beacon interval, which was not known when the AP interface was added.
2084          */
2085         if (vif->type == NL80211_IFTYPE_AP)
2086                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2087
2088         mvmvif->ap_assoc_sta_count = 0;
2089
2090         /* Add the mac context */
2091         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2092         if (ret)
2093                 goto out_unlock;
2094
2095         /* Perform the binding */
2096         ret = iwl_mvm_binding_add_vif(mvm, vif);
2097         if (ret)
2098                 goto out_remove;
2099
2100         /* Send the bcast station. At this stage the TBTT and DTIM time events
2101          * are added and applied to the scheduler */
2102         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2103         if (ret)
2104                 goto out_unbind;
2105
2106         /* must be set before quota calculations */
2107         mvmvif->ap_ibss_active = true;
2108
2109         /* power updated needs to be done before quotas */
2110         iwl_mvm_power_update_mac(mvm);
2111
2112         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2113         if (ret)
2114                 goto out_quota_failed;
2115
2116         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2117         if (vif->p2p && mvm->p2p_device_vif)
2118                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2119
2120         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2121
2122         iwl_mvm_bt_coex_vif_change(mvm);
2123
2124         /* we don't support TDLS during DCM */
2125         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2126                 iwl_mvm_teardown_tdls_peers(mvm);
2127
2128         goto out_unlock;
2129
2130 out_quota_failed:
2131         iwl_mvm_power_update_mac(mvm);
2132         mvmvif->ap_ibss_active = false;
2133         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2134 out_unbind:
2135         iwl_mvm_binding_remove_vif(mvm, vif);
2136 out_remove:
2137         iwl_mvm_mac_ctxt_remove(mvm, vif);
2138 out_unlock:
2139         mutex_unlock(&mvm->mutex);
2140         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2141         return ret;
2142 }
2143
2144 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2145                                  struct ieee80211_vif *vif)
2146 {
2147         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2148         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2149
2150         iwl_mvm_prepare_mac_removal(mvm, vif);
2151
2152         mutex_lock(&mvm->mutex);
2153
2154         /* Handle AP stop while in CSA */
2155         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2156                 iwl_mvm_remove_time_event(mvm, mvmvif,
2157                                           &mvmvif->time_event_data);
2158                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2159                 mvmvif->csa_countdown = false;
2160         }
2161
2162         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2163                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2164                 mvm->csa_tx_block_bcn_timeout = 0;
2165         }
2166
2167         mvmvif->ap_ibss_active = false;
2168         mvm->ap_last_beacon_gp2 = 0;
2169
2170         iwl_mvm_bt_coex_vif_change(mvm);
2171
2172         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2173
2174         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2175         if (vif->p2p && mvm->p2p_device_vif)
2176                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2177
2178         iwl_mvm_update_quotas(mvm, false, NULL);
2179         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2180         iwl_mvm_binding_remove_vif(mvm, vif);
2181
2182         iwl_mvm_power_update_mac(mvm);
2183
2184         iwl_mvm_mac_ctxt_remove(mvm, vif);
2185
2186         mutex_unlock(&mvm->mutex);
2187 }
2188
2189 static void
2190 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2191                                  struct ieee80211_vif *vif,
2192                                  struct ieee80211_bss_conf *bss_conf,
2193                                  u32 changes)
2194 {
2195         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2196
2197         /* Changes will be applied when the AP/IBSS is started */
2198         if (!mvmvif->ap_ibss_active)
2199                 return;
2200
2201         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2202                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2203             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2204                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2205
2206         /* Need to send a new beacon template to the FW */
2207         if (changes & BSS_CHANGED_BEACON &&
2208             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2209                 IWL_WARN(mvm, "Failed updating beacon data\n");
2210
2211         if (changes & BSS_CHANGED_TXPOWER) {
2212                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2213                                 bss_conf->txpower);
2214                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2215         }
2216 }
2217
2218 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2219                                      struct ieee80211_vif *vif,
2220                                      struct ieee80211_bss_conf *bss_conf,
2221                                      u32 changes)
2222 {
2223         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2224
2225         /*
2226          * iwl_mvm_bss_info_changed_station() might call
2227          * iwl_mvm_protect_session(), which reads directly from
2228          * the device (the system time), so make sure it is available.
2229          */
2230         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2231                 return;
2232
2233         mutex_lock(&mvm->mutex);
2234
2235         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2236                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2237
2238         switch (vif->type) {
2239         case NL80211_IFTYPE_STATION:
2240                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2241                 break;
2242         case NL80211_IFTYPE_AP:
2243         case NL80211_IFTYPE_ADHOC:
2244                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2245                 break;
2246         case NL80211_IFTYPE_MONITOR:
2247                 if (changes & BSS_CHANGED_MU_GROUPS)
2248                         iwl_mvm_update_mu_groups(mvm, vif);
2249                 break;
2250         default:
2251                 /* shouldn't happen */
2252                 WARN_ON_ONCE(1);
2253         }
2254
2255         mutex_unlock(&mvm->mutex);
2256         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2257 }
2258
2259 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2260                                struct ieee80211_vif *vif,
2261                                struct ieee80211_scan_request *hw_req)
2262 {
2263         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2264         int ret;
2265
2266         if (hw_req->req.n_channels == 0 ||
2267             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2268                 return -EINVAL;
2269
2270         mutex_lock(&mvm->mutex);
2271         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2272         mutex_unlock(&mvm->mutex);
2273
2274         return ret;
2275 }
2276
2277 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2278                                        struct ieee80211_vif *vif)
2279 {
2280         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2281
2282         mutex_lock(&mvm->mutex);
2283
2284         /* Due to a race condition, it's possible that mac80211 asks
2285          * us to stop a hw_scan when it's already stopped.  This can
2286          * happen, for instance, if we stopped the scan ourselves,
2287          * called ieee80211_scan_completed() and the userspace called
2288          * cancel scan scan before ieee80211_scan_work() could run.
2289          * To handle that, simply return if the scan is not running.
2290         */
2291         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2292                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2293
2294         mutex_unlock(&mvm->mutex);
2295 }
2296
2297 static void
2298 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2299                                   struct ieee80211_sta *sta, u16 tids,
2300                                   int num_frames,
2301                                   enum ieee80211_frame_release_type reason,
2302                                   bool more_data)
2303 {
2304         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2305
2306         /* Called when we need to transmit (a) frame(s) from mac80211 */
2307
2308         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2309                                           tids, more_data, false);
2310 }
2311
2312 static void
2313 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2314                                     struct ieee80211_sta *sta, u16 tids,
2315                                     int num_frames,
2316                                     enum ieee80211_frame_release_type reason,
2317                                     bool more_data)
2318 {
2319         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2320
2321         /* Called when we need to transmit (a) frame(s) from agg queue */
2322
2323         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2324                                           tids, more_data, true);
2325 }
2326
2327 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2328                                    struct ieee80211_vif *vif,
2329                                    enum sta_notify_cmd cmd,
2330                                    struct ieee80211_sta *sta)
2331 {
2332         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2333         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2334         unsigned long txqs = 0, tids = 0;
2335         int tid;
2336
2337         spin_lock_bh(&mvmsta->lock);
2338         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2339                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2340
2341                 if (tid_data->state != IWL_AGG_ON &&
2342                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2343                         continue;
2344
2345                 __set_bit(tid_data->txq_id, &txqs);
2346
2347                 if (iwl_mvm_tid_queued(tid_data) == 0)
2348                         continue;
2349
2350                 __set_bit(tid, &tids);
2351         }
2352
2353         switch (cmd) {
2354         case STA_NOTIFY_SLEEP:
2355                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2356                         ieee80211_sta_block_awake(hw, sta, true);
2357
2358                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2359                         ieee80211_sta_set_buffered(sta, tid, true);
2360
2361                 if (txqs)
2362                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2363                 /*
2364                  * The fw updates the STA to be asleep. Tx packets on the Tx
2365                  * queues to this station will not be transmitted. The fw will
2366                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2367                  */
2368                 break;
2369         case STA_NOTIFY_AWAKE:
2370                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2371                         break;
2372
2373                 if (txqs)
2374                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2375                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2376                 break;
2377         default:
2378                 break;
2379         }
2380         spin_unlock_bh(&mvmsta->lock);
2381 }
2382
2383 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2384                                        struct ieee80211_vif *vif,
2385                                        struct ieee80211_sta *sta)
2386 {
2387         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2388         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2389
2390         /*
2391          * This is called before mac80211 does RCU synchronisation,
2392          * so here we already invalidate our internal RCU-protected
2393          * station pointer. The rest of the code will thus no longer
2394          * be able to find the station this way, and we don't rely
2395          * on further RCU synchronisation after the sta_state()
2396          * callback deleted the station.
2397          */
2398         mutex_lock(&mvm->mutex);
2399         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2400                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2401                                    ERR_PTR(-ENOENT));
2402
2403         mutex_unlock(&mvm->mutex);
2404 }
2405
2406 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2407                                 const u8 *bssid)
2408 {
2409         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2410                 return;
2411
2412         if (vif->p2p && !iwl_mvm_is_p2p_scm_uapsd_supported(mvm)) {
2413                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2414                 return;
2415         }
2416
2417         if (!vif->p2p &&
2418             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2419                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2420                 return;
2421         }
2422
2423         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2424 }
2425
2426 static void
2427 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2428                            struct ieee80211_vif *vif, u8 *peer_addr,
2429                            enum nl80211_tdls_operation action)
2430 {
2431         struct iwl_fw_dbg_trigger_tlv *trig;
2432         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2433
2434         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2435                 return;
2436
2437         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2438         tdls_trig = (void *)trig->data;
2439         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2440                 return;
2441
2442         if (!(tdls_trig->action_bitmap & BIT(action)))
2443                 return;
2444
2445         if (tdls_trig->peer_mode &&
2446             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2447                 return;
2448
2449         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2450                                     "TDLS event occurred, peer %pM, action %d",
2451                                     peer_addr, action);
2452 }
2453
2454 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2455                                              struct iwl_mvm_sta *mvm_sta)
2456 {
2457         struct iwl_mvm_tid_data *tid_data;
2458         struct sk_buff *skb;
2459         int i;
2460
2461         spin_lock_bh(&mvm_sta->lock);
2462         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2463                 tid_data = &mvm_sta->tid_data[i];
2464                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2465                         ieee80211_free_txskb(mvm->hw, skb);
2466         }
2467         spin_unlock_bh(&mvm_sta->lock);
2468 }
2469
2470 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2471                                  struct ieee80211_vif *vif,
2472                                  struct ieee80211_sta *sta,
2473                                  enum ieee80211_sta_state old_state,
2474                                  enum ieee80211_sta_state new_state)
2475 {
2476         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2477         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2478         int ret;
2479
2480         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2481                            sta->addr, old_state, new_state);
2482
2483         /* this would be a mac80211 bug ... but don't crash */
2484         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2485                 return -EINVAL;
2486
2487         /* if a STA is being removed, reuse its ID */
2488         flush_work(&mvm->sta_drained_wk);
2489
2490         /*
2491          * If we are in a STA removal flow and in DQA mode:
2492          *
2493          * This is after the sync_rcu part, so the queues have already been
2494          * flushed. No more TXs on their way in mac80211's path, and no more in
2495          * the queues.
2496          * Also, we won't be getting any new TX frames for this station.
2497          * What we might have are deferred TX frames that need to be taken care
2498          * of.
2499          *
2500          * Drop any still-queued deferred-frame before removing the STA, and
2501          * make sure the worker is no longer handling frames for this STA.
2502          */
2503         if (old_state == IEEE80211_STA_NONE &&
2504             new_state == IEEE80211_STA_NOTEXIST &&
2505             iwl_mvm_is_dqa_supported(mvm)) {
2506                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2507
2508                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2509                 flush_work(&mvm->add_stream_wk);
2510
2511                 /*
2512                  * No need to make sure deferred TX indication is off since the
2513                  * worker will already remove it if it was on
2514                  */
2515         }
2516
2517         mutex_lock(&mvm->mutex);
2518         if (old_state == IEEE80211_STA_NOTEXIST &&
2519             new_state == IEEE80211_STA_NONE) {
2520                 /*
2521                  * Firmware bug - it'll crash if the beacon interval is less
2522                  * than 16. We can't avoid connecting at all, so refuse the
2523                  * station state change, this will cause mac80211 to abandon
2524                  * attempts to connect to this AP, and eventually wpa_s will
2525                  * blacklist the AP...
2526                  */
2527                 if (vif->type == NL80211_IFTYPE_STATION &&
2528                     vif->bss_conf.beacon_int < 16) {
2529                         IWL_ERR(mvm,
2530                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2531                                 sta->addr, vif->bss_conf.beacon_int);
2532                         ret = -EINVAL;
2533                         goto out_unlock;
2534                 }
2535
2536                 if (sta->tdls &&
2537                     (vif->p2p ||
2538                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2539                                                 IWL_MVM_TDLS_STA_COUNT ||
2540                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2541                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2542                         ret = -EBUSY;
2543                         goto out_unlock;
2544                 }
2545
2546                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2547                 if (sta->tdls && ret == 0) {
2548                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2549                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2550                                                    NL80211_TDLS_SETUP);
2551                 }
2552         } else if (old_state == IEEE80211_STA_NONE &&
2553                    new_state == IEEE80211_STA_AUTH) {
2554                 /*
2555                  * EBS may be disabled due to previous failures reported by FW.
2556                  * Reset EBS status here assuming environment has been changed.
2557                  */
2558                 mvm->last_ebs_successful = true;
2559                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2560                 ret = 0;
2561         } else if (old_state == IEEE80211_STA_AUTH &&
2562                    new_state == IEEE80211_STA_ASSOC) {
2563                 if (vif->type == NL80211_IFTYPE_AP) {
2564                         mvmvif->ap_assoc_sta_count++;
2565                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2566                 }
2567                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2568                 if (ret == 0)
2569                         iwl_mvm_rs_rate_init(mvm, sta,
2570                                              mvmvif->phy_ctxt->channel->band,
2571                                              true);
2572         } else if (old_state == IEEE80211_STA_ASSOC &&
2573                    new_state == IEEE80211_STA_AUTHORIZED) {
2574
2575                 /* we don't support TDLS during DCM */
2576                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2577                         iwl_mvm_teardown_tdls_peers(mvm);
2578
2579                 if (sta->tdls)
2580                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2581                                                    NL80211_TDLS_ENABLE_LINK);
2582
2583                 /* enable beacon filtering */
2584                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2585                 ret = 0;
2586         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2587                    new_state == IEEE80211_STA_ASSOC) {
2588                 /* disable beacon filtering */
2589                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2590                 ret = 0;
2591         } else if (old_state == IEEE80211_STA_ASSOC &&
2592                    new_state == IEEE80211_STA_AUTH) {
2593                 if (vif->type == NL80211_IFTYPE_AP) {
2594                         mvmvif->ap_assoc_sta_count--;
2595                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2596                 }
2597                 ret = 0;
2598         } else if (old_state == IEEE80211_STA_AUTH &&
2599                    new_state == IEEE80211_STA_NONE) {
2600                 ret = 0;
2601         } else if (old_state == IEEE80211_STA_NONE &&
2602                    new_state == IEEE80211_STA_NOTEXIST) {
2603                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2604                 if (sta->tdls) {
2605                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2606                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2607                                                    NL80211_TDLS_DISABLE_LINK);
2608                 }
2609         } else {
2610                 ret = -EIO;
2611         }
2612  out_unlock:
2613         mutex_unlock(&mvm->mutex);
2614
2615         if (sta->tdls && ret == 0) {
2616                 if (old_state == IEEE80211_STA_NOTEXIST &&
2617                     new_state == IEEE80211_STA_NONE)
2618                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2619                 else if (old_state == IEEE80211_STA_NONE &&
2620                          new_state == IEEE80211_STA_NOTEXIST)
2621                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2622         }
2623
2624         return ret;
2625 }
2626
2627 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2628 {
2629         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2630
2631         mvm->rts_threshold = value;
2632
2633         return 0;
2634 }
2635
2636 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2637                                   struct ieee80211_vif *vif,
2638                                   struct ieee80211_sta *sta, u32 changed)
2639 {
2640         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2641
2642         if (vif->type == NL80211_IFTYPE_STATION &&
2643             changed & IEEE80211_RC_NSS_CHANGED)
2644                 iwl_mvm_sf_update(mvm, vif, false);
2645 }
2646
2647 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2648                                struct ieee80211_vif *vif, u16 ac,
2649                                const struct ieee80211_tx_queue_params *params)
2650 {
2651         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2652         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2653
2654         mvmvif->queue_params[ac] = *params;
2655
2656         /*
2657          * No need to update right away, we'll get BSS_CHANGED_QOS
2658          * The exception is P2P_DEVICE interface which needs immediate update.
2659          */
2660         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2661                 int ret;
2662
2663                 mutex_lock(&mvm->mutex);
2664                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2665                 mutex_unlock(&mvm->mutex);
2666                 return ret;
2667         }
2668         return 0;
2669 }
2670
2671 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2672                                       struct ieee80211_vif *vif)
2673 {
2674         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2675         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2676         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2677
2678         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2679                 return;
2680
2681         /*
2682          * iwl_mvm_protect_session() reads directly from the device
2683          * (the system time), so make sure it is available.
2684          */
2685         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2686                 return;
2687
2688         mutex_lock(&mvm->mutex);
2689         /* Try really hard to protect the session and hear a beacon */
2690         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2691         mutex_unlock(&mvm->mutex);
2692
2693         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2694 }
2695
2696 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2697                                         struct ieee80211_vif *vif,
2698                                         struct cfg80211_sched_scan_request *req,
2699                                         struct ieee80211_scan_ies *ies)
2700 {
2701         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2702
2703         int ret;
2704
2705         mutex_lock(&mvm->mutex);
2706
2707         if (!vif->bss_conf.idle) {
2708                 ret = -EBUSY;
2709                 goto out;
2710         }
2711
2712         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2713
2714 out:
2715         mutex_unlock(&mvm->mutex);
2716         return ret;
2717 }
2718
2719 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2720                                        struct ieee80211_vif *vif)
2721 {
2722         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2723         int ret;
2724
2725         mutex_lock(&mvm->mutex);
2726
2727         /* Due to a race condition, it's possible that mac80211 asks
2728          * us to stop a sched_scan when it's already stopped.  This
2729          * can happen, for instance, if we stopped the scan ourselves,
2730          * called ieee80211_sched_scan_stopped() and the userspace called
2731          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2732          * could run.  To handle this, simply return if the scan is
2733          * not running.
2734         */
2735         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2736                 mutex_unlock(&mvm->mutex);
2737                 return 0;
2738         }
2739
2740         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2741         mutex_unlock(&mvm->mutex);
2742         iwl_mvm_wait_for_async_handlers(mvm);
2743
2744         return ret;
2745 }
2746
2747 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2748                                enum set_key_cmd cmd,
2749                                struct ieee80211_vif *vif,
2750                                struct ieee80211_sta *sta,
2751                                struct ieee80211_key_conf *key)
2752 {
2753         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2754         struct iwl_mvm_sta *mvmsta;
2755         struct iwl_mvm_key_pn *ptk_pn;
2756         int keyidx = key->keyidx;
2757         int ret;
2758         u8 key_offset;
2759
2760         if (iwlwifi_mod_params.sw_crypto) {
2761                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2762                 return -EOPNOTSUPP;
2763         }
2764
2765         switch (key->cipher) {
2766         case WLAN_CIPHER_SUITE_TKIP:
2767                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2768                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2769                 break;
2770         case WLAN_CIPHER_SUITE_CCMP:
2771         case WLAN_CIPHER_SUITE_GCMP:
2772         case WLAN_CIPHER_SUITE_GCMP_256:
2773                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2774                 break;
2775         case WLAN_CIPHER_SUITE_AES_CMAC:
2776         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2777         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2778                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2779                 break;
2780         case WLAN_CIPHER_SUITE_WEP40:
2781         case WLAN_CIPHER_SUITE_WEP104:
2782                 /* For non-client mode, only use WEP keys for TX as we probably
2783                  * don't have a station yet anyway and would then have to keep
2784                  * track of the keys, linking them to each of the clients/peers
2785                  * as they appear. For now, don't do that, for performance WEP
2786                  * offload doesn't really matter much, but we need it for some
2787                  * other offload features in client mode.
2788                  */
2789                 if (vif->type != NL80211_IFTYPE_STATION)
2790                         return 0;
2791                 break;
2792         default:
2793                 /* currently FW supports only one optional cipher scheme */
2794                 if (hw->n_cipher_schemes &&
2795                     hw->cipher_schemes->cipher == key->cipher)
2796                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2797                 else
2798                         return -EOPNOTSUPP;
2799         }
2800
2801         mutex_lock(&mvm->mutex);
2802
2803         switch (cmd) {
2804         case SET_KEY:
2805                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2806                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2807                         /*
2808                          * GTK on AP interface is a TX-only key, return 0;
2809                          * on IBSS they're per-station and because we're lazy
2810                          * we don't support them for RX, so do the same.
2811                          * CMAC/GMAC in AP/IBSS modes must be done in software.
2812                          */
2813                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
2814                             key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
2815                             key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2816                                 ret = -EOPNOTSUPP;
2817                         else
2818                                 ret = 0;
2819                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2820                         break;
2821                 }
2822
2823                 /* During FW restart, in order to restore the state as it was,
2824                  * don't try to reprogram keys we previously failed for.
2825                  */
2826                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2827                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2828                         IWL_DEBUG_MAC80211(mvm,
2829                                            "skip invalid idx key programming during restart\n");
2830                         ret = 0;
2831                         break;
2832                 }
2833
2834                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2835                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2836                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2837                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2838                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2839                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2840                         struct ieee80211_key_seq seq;
2841                         int tid, q;
2842
2843                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2844                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2845                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2846                                          mvm->trans->num_rx_queues *
2847                                                 sizeof(ptk_pn->q[0]),
2848                                          GFP_KERNEL);
2849                         if (!ptk_pn) {
2850                                 ret = -ENOMEM;
2851                                 break;
2852                         }
2853
2854                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2855                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2856                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2857                                         memcpy(ptk_pn->q[q].pn[tid],
2858                                                seq.ccmp.pn,
2859                                                IEEE80211_CCMP_PN_LEN);
2860                         }
2861
2862                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2863                 }
2864
2865                 /* in HW restart reuse the index, otherwise request a new one */
2866                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2867                         key_offset = key->hw_key_idx;
2868                 else
2869                         key_offset = STA_KEY_IDX_INVALID;
2870
2871                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2872                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2873                 if (ret) {
2874                         IWL_WARN(mvm, "set key failed\n");
2875                         /*
2876                          * can't add key for RX, but we don't need it
2877                          * in the device for TX so still return 0
2878                          */
2879                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2880                         ret = 0;
2881                 }
2882
2883                 break;
2884         case DISABLE_KEY:
2885                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2886                         ret = 0;
2887                         break;
2888                 }
2889
2890                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2891                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2892                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2893                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2894                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2895                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2896                         ptk_pn = rcu_dereference_protected(
2897                                                 mvmsta->ptk_pn[keyidx],
2898                                                 lockdep_is_held(&mvm->mutex));
2899                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2900                         if (ptk_pn)
2901                                 kfree_rcu(ptk_pn, rcu_head);
2902                 }
2903
2904                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2905                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2906                 break;
2907         default:
2908                 ret = -EINVAL;
2909         }
2910
2911         mutex_unlock(&mvm->mutex);
2912         return ret;
2913 }
2914
2915 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2916                                         struct ieee80211_vif *vif,
2917                                         struct ieee80211_key_conf *keyconf,
2918                                         struct ieee80211_sta *sta,
2919                                         u32 iv32, u16 *phase1key)
2920 {
2921         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2922
2923         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2924                 return;
2925
2926         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2927 }
2928
2929
2930 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2931                                struct iwl_rx_packet *pkt, void *data)
2932 {
2933         struct iwl_mvm *mvm =
2934                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2935         struct iwl_hs20_roc_res *resp;
2936         int resp_len = iwl_rx_packet_payload_len(pkt);
2937         struct iwl_mvm_time_event_data *te_data = data;
2938
2939         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2940                 return true;
2941
2942         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2943                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2944                 return true;
2945         }
2946
2947         resp = (void *)pkt->data;
2948
2949         IWL_DEBUG_TE(mvm,
2950                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2951                      resp->status, resp->event_unique_id);
2952
2953         te_data->uid = le32_to_cpu(resp->event_unique_id);
2954         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2955                      te_data->uid);
2956
2957         spin_lock_bh(&mvm->time_event_lock);
2958         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2959         spin_unlock_bh(&mvm->time_event_lock);
2960
2961         return true;
2962 }
2963
2964 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2965 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2966 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2967 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2968 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2969 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2970                                     struct ieee80211_channel *channel,
2971                                     struct ieee80211_vif *vif,
2972                                     int duration)
2973 {
2974         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2975         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2976         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2977         static const u16 time_event_response[] = { HOT_SPOT_CMD };
2978         struct iwl_notification_wait wait_time_event;
2979         u32 dtim_interval = vif->bss_conf.dtim_period *
2980                 vif->bss_conf.beacon_int;
2981         u32 req_dur, delay;
2982         struct iwl_hs20_roc_req aux_roc_req = {
2983                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2984                 .id_and_color =
2985                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2986                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2987                 /* Set the channel info data */
2988                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
2989                         PHY_BAND_24 : PHY_BAND_5,
2990                 .channel_info.channel = channel->hw_value,
2991                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2992                 /* Set the time and duration */
2993                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2994          };
2995
2996         delay = AUX_ROC_MIN_DELAY;
2997         req_dur = MSEC_TO_TU(duration);
2998
2999         /*
3000          * If we are associated we want the delay time to be at least one
3001          * dtim interval so that the FW can wait until after the DTIM and
3002          * then start the time event, this will potentially allow us to
3003          * remain off-channel for the max duration.
3004          * Since we want to use almost a whole dtim interval we would also
3005          * like the delay to be for 2-3 dtim intervals, in case there are
3006          * other time events with higher priority.
3007          */
3008         if (vif->bss_conf.assoc) {
3009                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
3010                 /* We cannot remain off-channel longer than the DTIM interval */
3011                 if (dtim_interval <= req_dur) {
3012                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
3013                         if (req_dur <= AUX_ROC_MIN_DURATION)
3014                                 req_dur = dtim_interval -
3015                                         AUX_ROC_MIN_SAFETY_BUFFER;
3016                 }
3017         }
3018
3019         aux_roc_req.duration = cpu_to_le32(req_dur);
3020         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
3021
3022         IWL_DEBUG_TE(mvm,
3023                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
3024                      channel->hw_value, req_dur, duration, delay,
3025                      dtim_interval);
3026         /* Set the node address */
3027         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3028
3029         lockdep_assert_held(&mvm->mutex);
3030
3031         spin_lock_bh(&mvm->time_event_lock);
3032
3033         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3034                 spin_unlock_bh(&mvm->time_event_lock);
3035                 return -EIO;
3036         }
3037
3038         te_data->vif = vif;
3039         te_data->duration = duration;
3040         te_data->id = HOT_SPOT_CMD;
3041
3042         spin_unlock_bh(&mvm->time_event_lock);
3043
3044         /*
3045          * Use a notification wait, which really just processes the
3046          * command response and doesn't wait for anything, in order
3047          * to be able to process the response and get the UID inside
3048          * the RX path. Using CMD_WANT_SKB doesn't work because it
3049          * stores the buffer and then wakes up this thread, by which
3050          * time another notification (that the time event started)
3051          * might already be processed unsuccessfully.
3052          */
3053         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3054                                    time_event_response,
3055                                    ARRAY_SIZE(time_event_response),
3056                                    iwl_mvm_rx_aux_roc, te_data);
3057
3058         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3059                                    &aux_roc_req);
3060
3061         if (res) {
3062                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3063                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3064                 goto out_clear_te;
3065         }
3066
3067         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3068         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3069         /* should never fail */
3070         WARN_ON_ONCE(res);
3071
3072         if (res) {
3073  out_clear_te:
3074                 spin_lock_bh(&mvm->time_event_lock);
3075                 iwl_mvm_te_clear_data(mvm, te_data);
3076                 spin_unlock_bh(&mvm->time_event_lock);
3077         }
3078
3079         return res;
3080 }
3081
3082 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3083                        struct ieee80211_vif *vif,
3084                        struct ieee80211_channel *channel,
3085                        int duration,
3086                        enum ieee80211_roc_type type)
3087 {
3088         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3089         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3090         struct cfg80211_chan_def chandef;
3091         struct iwl_mvm_phy_ctxt *phy_ctxt;
3092         int ret, i;
3093
3094         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3095                            duration, type);
3096
3097         flush_work(&mvm->roc_done_wk);
3098
3099         mutex_lock(&mvm->mutex);
3100
3101         switch (vif->type) {
3102         case NL80211_IFTYPE_STATION:
3103                 if (fw_has_capa(&mvm->fw->ucode_capa,
3104                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3105                         /* Use aux roc framework (HS20) */
3106                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3107                                                        vif, duration);
3108                         goto out_unlock;
3109                 }
3110                 IWL_ERR(mvm, "hotspot not supported\n");
3111                 ret = -EINVAL;
3112                 goto out_unlock;
3113         case NL80211_IFTYPE_P2P_DEVICE:
3114                 /* handle below */
3115                 break;
3116         default:
3117                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3118                 ret = -EINVAL;
3119                 goto out_unlock;
3120         }
3121
3122         for (i = 0; i < NUM_PHY_CTX; i++) {
3123                 phy_ctxt = &mvm->phy_ctxts[i];
3124                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3125                         continue;
3126
3127                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3128                         /*
3129                          * Unbind the P2P_DEVICE from the current PHY context,
3130                          * and if the PHY context is not used remove it.
3131                          */
3132                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3133                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3134                                 goto out_unlock;
3135
3136                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3137
3138                         /* Bind the P2P_DEVICE to the current PHY Context */
3139                         mvmvif->phy_ctxt = phy_ctxt;
3140
3141                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3142                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3143                                 goto out_unlock;
3144
3145                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3146                         goto schedule_time_event;
3147                 }
3148         }
3149
3150         /* Need to update the PHY context only if the ROC channel changed */
3151         if (channel == mvmvif->phy_ctxt->channel)
3152                 goto schedule_time_event;
3153
3154         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3155
3156         /*
3157          * Change the PHY context configuration as it is currently referenced
3158          * only by the P2P Device MAC
3159          */
3160         if (mvmvif->phy_ctxt->ref == 1) {
3161                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3162                                                &chandef, 1, 1);
3163                 if (ret)
3164                         goto out_unlock;
3165         } else {
3166                 /*
3167                  * The PHY context is shared with other MACs. Need to remove the
3168                  * P2P Device from the binding, allocate an new PHY context and
3169                  * create a new binding
3170                  */
3171                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3172                 if (!phy_ctxt) {
3173                         ret = -ENOSPC;
3174                         goto out_unlock;
3175                 }
3176
3177                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3178                                                1, 1);
3179                 if (ret) {
3180                         IWL_ERR(mvm, "Failed to change PHY context\n");
3181                         goto out_unlock;
3182                 }
3183
3184                 /* Unbind the P2P_DEVICE from the current PHY context */
3185                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3186                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3187                         goto out_unlock;
3188
3189                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3190
3191                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3192                 mvmvif->phy_ctxt = phy_ctxt;
3193
3194                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3195                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3196                         goto out_unlock;
3197
3198                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3199         }
3200
3201 schedule_time_event:
3202         /* Schedule the time events */
3203         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3204
3205 out_unlock:
3206         mutex_unlock(&mvm->mutex);
3207         IWL_DEBUG_MAC80211(mvm, "leave\n");
3208         return ret;
3209 }
3210
3211 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3212 {
3213         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3214
3215         IWL_DEBUG_MAC80211(mvm, "enter\n");
3216
3217         mutex_lock(&mvm->mutex);
3218         iwl_mvm_stop_roc(mvm);
3219         mutex_unlock(&mvm->mutex);
3220
3221         IWL_DEBUG_MAC80211(mvm, "leave\n");
3222         return 0;
3223 }
3224
3225 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3226                                  struct ieee80211_chanctx_conf *ctx)
3227 {
3228         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3229         struct iwl_mvm_phy_ctxt *phy_ctxt;
3230         int ret;
3231
3232         lockdep_assert_held(&mvm->mutex);
3233
3234         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3235
3236         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3237         if (!phy_ctxt) {
3238                 ret = -ENOSPC;
3239                 goto out;
3240         }
3241
3242         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3243                                        ctx->rx_chains_static,
3244                                        ctx->rx_chains_dynamic);
3245         if (ret) {
3246                 IWL_ERR(mvm, "Failed to add PHY context\n");
3247                 goto out;
3248         }
3249
3250         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3251         *phy_ctxt_id = phy_ctxt->id;
3252 out:
3253         return ret;
3254 }
3255
3256 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3257                                struct ieee80211_chanctx_conf *ctx)
3258 {
3259         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3260         int ret;
3261
3262         mutex_lock(&mvm->mutex);
3263         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3264         mutex_unlock(&mvm->mutex);
3265
3266         return ret;
3267 }
3268
3269 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3270                                      struct ieee80211_chanctx_conf *ctx)
3271 {
3272         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3273         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3274
3275         lockdep_assert_held(&mvm->mutex);
3276
3277         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3278 }
3279
3280 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3281                                    struct ieee80211_chanctx_conf *ctx)
3282 {
3283         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3284
3285         mutex_lock(&mvm->mutex);
3286         __iwl_mvm_remove_chanctx(mvm, ctx);
3287         mutex_unlock(&mvm->mutex);
3288 }
3289
3290 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3291                                    struct ieee80211_chanctx_conf *ctx,
3292                                    u32 changed)
3293 {
3294         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3295         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3296         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3297
3298         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3299                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3300                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3301                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3302                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3303                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3304                       phy_ctxt->ref, changed))
3305                 return;
3306
3307         mutex_lock(&mvm->mutex);
3308         iwl_mvm_bt_coex_vif_change(mvm);
3309         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3310                                  ctx->rx_chains_static,
3311                                  ctx->rx_chains_dynamic);
3312         mutex_unlock(&mvm->mutex);
3313 }
3314
3315 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3316                                         struct ieee80211_vif *vif,
3317                                         struct ieee80211_chanctx_conf *ctx,
3318                                         bool switching_chanctx)
3319 {
3320         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3321         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3322         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3323         int ret;
3324
3325         lockdep_assert_held(&mvm->mutex);
3326
3327         mvmvif->phy_ctxt = phy_ctxt;
3328
3329         switch (vif->type) {
3330         case NL80211_IFTYPE_AP:
3331                 /* only needed if we're switching chanctx (i.e. during CSA) */
3332                 if (switching_chanctx) {
3333                         mvmvif->ap_ibss_active = true;
3334                         break;
3335                 }
3336         case NL80211_IFTYPE_ADHOC:
3337                 /*
3338                  * The AP binding flow is handled as part of the start_ap flow
3339                  * (in bss_info_changed), similarly for IBSS.
3340                  */
3341                 ret = 0;
3342                 goto out;
3343         case NL80211_IFTYPE_STATION:
3344                 break;
3345         case NL80211_IFTYPE_MONITOR:
3346                 /* always disable PS when a monitor interface is active */
3347                 mvmvif->ps_disabled = true;
3348                 break;
3349         default:
3350                 ret = -EINVAL;
3351                 goto out;
3352         }
3353
3354         ret = iwl_mvm_binding_add_vif(mvm, vif);
3355         if (ret)
3356                 goto out;
3357
3358         /*
3359          * Power state must be updated before quotas,
3360          * otherwise fw will complain.
3361          */
3362         iwl_mvm_power_update_mac(mvm);
3363
3364         /* Setting the quota at this stage is only required for monitor
3365          * interfaces. For the other types, the bss_info changed flow
3366          * will handle quota settings.
3367          */
3368         if (vif->type == NL80211_IFTYPE_MONITOR) {
3369                 mvmvif->monitor_active = true;
3370                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3371                 if (ret)
3372                         goto out_remove_binding;
3373
3374                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3375                 if (ret)
3376                         goto out_remove_binding;
3377
3378         }
3379
3380         /* Handle binding during CSA */
3381         if (vif->type == NL80211_IFTYPE_AP) {
3382                 iwl_mvm_update_quotas(mvm, false, NULL);
3383                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3384         }
3385
3386         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3387                 u32 duration = 2 * vif->bss_conf.beacon_int;
3388
3389                 /* iwl_mvm_protect_session() reads directly from the
3390                  * device (the system time), so make sure it is
3391                  * available.
3392                  */
3393                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3394                 if (ret)
3395                         goto out_remove_binding;
3396
3397                 /* Protect the session to make sure we hear the first
3398                  * beacon on the new channel.
3399                  */
3400                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3401                                         vif->bss_conf.beacon_int / 2,
3402                                         true);
3403
3404                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3405
3406                 iwl_mvm_update_quotas(mvm, false, NULL);
3407         }
3408
3409         goto out;
3410
3411 out_remove_binding:
3412         iwl_mvm_binding_remove_vif(mvm, vif);
3413         iwl_mvm_power_update_mac(mvm);
3414 out:
3415         if (ret)
3416                 mvmvif->phy_ctxt = NULL;
3417         return ret;
3418 }
3419 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3420                                       struct ieee80211_vif *vif,
3421                                       struct ieee80211_chanctx_conf *ctx)
3422 {
3423         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3424         int ret;
3425
3426         mutex_lock(&mvm->mutex);
3427         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3428         mutex_unlock(&mvm->mutex);
3429
3430         return ret;
3431 }
3432
3433 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3434                                            struct ieee80211_vif *vif,
3435                                            struct ieee80211_chanctx_conf *ctx,
3436                                            bool switching_chanctx)
3437 {
3438         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3439         struct ieee80211_vif *disabled_vif = NULL;
3440
3441         lockdep_assert_held(&mvm->mutex);
3442
3443         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3444
3445         switch (vif->type) {
3446         case NL80211_IFTYPE_ADHOC:
3447                 goto out;
3448         case NL80211_IFTYPE_MONITOR:
3449                 mvmvif->monitor_active = false;
3450                 mvmvif->ps_disabled = false;
3451                 iwl_mvm_rm_snif_sta(mvm, vif);
3452                 break;
3453         case NL80211_IFTYPE_AP:
3454                 /* This part is triggered only during CSA */
3455                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3456                         goto out;
3457
3458                 mvmvif->csa_countdown = false;
3459
3460                 /* Set CS bit on all the stations */
3461                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3462
3463                 /* Save blocked iface, the timeout is set on the next beacon */
3464                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3465
3466                 mvmvif->ap_ibss_active = false;
3467                 break;
3468         case NL80211_IFTYPE_STATION:
3469                 if (!switching_chanctx)
3470                         break;
3471
3472                 disabled_vif = vif;
3473
3474                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3475                 break;
3476         default:
3477                 break;
3478         }
3479
3480         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3481         iwl_mvm_binding_remove_vif(mvm, vif);
3482
3483 out:
3484         mvmvif->phy_ctxt = NULL;
3485         iwl_mvm_power_update_mac(mvm);
3486 }
3487
3488 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3489                                          struct ieee80211_vif *vif,
3490                                          struct ieee80211_chanctx_conf *ctx)
3491 {
3492         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3493
3494         mutex_lock(&mvm->mutex);
3495         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3496         mutex_unlock(&mvm->mutex);
3497 }
3498
3499 static int
3500 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3501                                 struct ieee80211_vif_chanctx_switch *vifs)
3502 {
3503         int ret;
3504
3505         mutex_lock(&mvm->mutex);
3506         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3507         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3508
3509         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3510         if (ret) {
3511                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3512                 goto out_reassign;
3513         }
3514
3515         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3516                                            true);
3517         if (ret) {
3518                 IWL_ERR(mvm,
3519                         "failed to assign new_ctx during channel switch\n");
3520                 goto out_remove;
3521         }
3522
3523         /* we don't support TDLS during DCM - can be caused by channel switch */
3524         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3525                 iwl_mvm_teardown_tdls_peers(mvm);
3526
3527         goto out;
3528
3529 out_remove:
3530         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3531
3532 out_reassign:
3533         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3534                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3535                 goto out_restart;
3536         }
3537
3538         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3539                                          true)) {
3540                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3541                 goto out_restart;
3542         }
3543
3544         goto out;
3545
3546 out_restart:
3547         /* things keep failing, better restart the hw */
3548         iwl_mvm_nic_restart(mvm, false);
3549
3550 out:
3551         mutex_unlock(&mvm->mutex);
3552
3553         return ret;
3554 }
3555
3556 static int
3557 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3558                                     struct ieee80211_vif_chanctx_switch *vifs)
3559 {
3560         int ret;
3561
3562         mutex_lock(&mvm->mutex);
3563         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3564
3565         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3566                                            true);
3567         if (ret) {
3568                 IWL_ERR(mvm,
3569                         "failed to assign new_ctx during channel switch\n");
3570                 goto out_reassign;
3571         }
3572
3573         goto out;
3574
3575 out_reassign:
3576         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3577                                          true)) {
3578                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3579                 goto out_restart;
3580         }
3581
3582         goto out;
3583
3584 out_restart:
3585         /* things keep failing, better restart the hw */
3586         iwl_mvm_nic_restart(mvm, false);
3587
3588 out:
3589         mutex_unlock(&mvm->mutex);
3590
3591         return ret;
3592 }
3593
3594 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3595                                       struct ieee80211_vif_chanctx_switch *vifs,
3596                                       int n_vifs,
3597                                       enum ieee80211_chanctx_switch_mode mode)
3598 {
3599         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3600         int ret;
3601
3602         /* we only support a single-vif right now */
3603         if (n_vifs > 1)
3604                 return -EOPNOTSUPP;
3605
3606         switch (mode) {
3607         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3608                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3609                 break;
3610         case CHANCTX_SWMODE_REASSIGN_VIF:
3611                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3612                 break;
3613         default:
3614                 ret = -EOPNOTSUPP;
3615                 break;
3616         }
3617
3618         return ret;
3619 }
3620
3621 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3622                            struct ieee80211_sta *sta,
3623                            bool set)
3624 {
3625         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3626         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3627
3628         if (!mvm_sta || !mvm_sta->vif) {
3629                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3630                 return -EINVAL;
3631         }
3632
3633         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3634 }
3635
3636 #ifdef CONFIG_NL80211_TESTMODE
3637 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3638         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3639         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3640         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3641 };
3642
3643 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3644                                       struct ieee80211_vif *vif,
3645                                       void *data, int len)
3646 {
3647         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3648         int err;
3649         u32 noa_duration;
3650
3651         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3652         if (err)
3653                 return err;
3654
3655         if (!tb[IWL_MVM_TM_ATTR_CMD])
3656                 return -EINVAL;
3657
3658         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3659         case IWL_MVM_TM_CMD_SET_NOA:
3660                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3661                     !vif->bss_conf.enable_beacon ||
3662                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3663                         return -EINVAL;
3664
3665                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3666                 if (noa_duration >= vif->bss_conf.beacon_int)
3667                         return -EINVAL;
3668
3669                 mvm->noa_duration = noa_duration;
3670                 mvm->noa_vif = vif;
3671
3672                 return iwl_mvm_update_quotas(mvm, false, NULL);
3673         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3674                 /* must be associated client vif - ignore authorized */
3675                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3676                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3677                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3678                         return -EINVAL;
3679
3680                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3681                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3682                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3683         }
3684
3685         return -EOPNOTSUPP;
3686 }
3687
3688 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3689                                     struct ieee80211_vif *vif,
3690                                     void *data, int len)
3691 {
3692         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3693         int err;
3694
3695         mutex_lock(&mvm->mutex);
3696         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3697         mutex_unlock(&mvm->mutex);
3698
3699         return err;
3700 }
3701 #endif
3702
3703 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3704                                    struct ieee80211_vif *vif,
3705                                    struct ieee80211_channel_switch *chsw)
3706 {
3707         /* By implementing this operation, we prevent mac80211 from
3708          * starting its own channel switch timer, so that we can call
3709          * ieee80211_chswitch_done() ourselves at the right time
3710          * (which is when the absence time event starts).
3711          */
3712
3713         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3714                            "dummy channel switch op\n");
3715 }
3716
3717 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3718                                       struct ieee80211_vif *vif,
3719                                       struct ieee80211_channel_switch *chsw)
3720 {
3721         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3722         struct ieee80211_vif *csa_vif;
3723         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3724         u32 apply_time;
3725         int ret;
3726
3727         mutex_lock(&mvm->mutex);
3728
3729         mvmvif->csa_failed = false;
3730
3731         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3732                            chsw->chandef.center_freq1);
3733
3734         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3735
3736         switch (vif->type) {
3737         case NL80211_IFTYPE_AP:
3738                 csa_vif =
3739                         rcu_dereference_protected(mvm->csa_vif,
3740                                                   lockdep_is_held(&mvm->mutex));
3741                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3742                               "Another CSA is already in progress")) {
3743                         ret = -EBUSY;
3744                         goto out_unlock;
3745                 }
3746
3747                 /* we still didn't unblock tx. prevent new CS meanwhile */
3748                 if (rcu_dereference_protected(mvm->csa_tx_blocked_vif,
3749                                               lockdep_is_held(&mvm->mutex))) {
3750                         ret = -EBUSY;
3751                         goto out_unlock;
3752                 }
3753
3754                 rcu_assign_pointer(mvm->csa_vif, vif);
3755
3756                 if (WARN_ONCE(mvmvif->csa_countdown,
3757                               "Previous CSA countdown didn't complete")) {
3758                         ret = -EBUSY;
3759                         goto out_unlock;
3760                 }
3761
3762                 mvmvif->csa_target_freq = chsw->chandef.chan->center_freq;
3763
3764                 break;
3765         case NL80211_IFTYPE_STATION:
3766                 if (mvmvif->lqm_active)
3767                         iwl_mvm_send_lqm_cmd(vif,
3768                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3769                                              0, 0);
3770
3771                 /* Schedule the time event to a bit before beacon 1,
3772                  * to make sure we're in the new channel when the
3773                  * GO/AP arrives.
3774                  */
3775                 apply_time = chsw->device_timestamp +
3776                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3777                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3778
3779                 if (chsw->block_tx)
3780                         iwl_mvm_csa_client_absent(mvm, vif);
3781
3782                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3783                                             apply_time);
3784                 if (mvmvif->bf_data.bf_enabled) {
3785                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3786                         if (ret)
3787                                 goto out_unlock;
3788                 }
3789
3790                 break;
3791         default:
3792                 break;
3793         }
3794
3795         mvmvif->ps_disabled = true;
3796
3797         ret = iwl_mvm_power_update_ps(mvm);
3798         if (ret)
3799                 goto out_unlock;
3800
3801         /* we won't be on this channel any longer */
3802         iwl_mvm_teardown_tdls_peers(mvm);
3803
3804 out_unlock:
3805         mutex_unlock(&mvm->mutex);
3806
3807         return ret;
3808 }
3809
3810 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3811                                        struct ieee80211_vif *vif)
3812 {
3813         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3815         int ret;
3816
3817         mutex_lock(&mvm->mutex);
3818
3819         if (mvmvif->csa_failed) {
3820                 mvmvif->csa_failed = false;
3821                 ret = -EIO;
3822                 goto out_unlock;
3823         }
3824
3825         if (vif->type == NL80211_IFTYPE_STATION) {
3826                 struct iwl_mvm_sta *mvmsta;
3827
3828                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3829                                                           mvmvif->ap_sta_id);
3830
3831                 if (WARN_ON(!mvmsta)) {
3832                         ret = -EIO;
3833                         goto out_unlock;
3834                 }
3835
3836                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3837
3838                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3839
3840                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3841                 if (ret)
3842                         goto out_unlock;
3843
3844                 iwl_mvm_stop_session_protection(mvm, vif);
3845         }
3846
3847         mvmvif->ps_disabled = false;
3848
3849         ret = iwl_mvm_power_update_ps(mvm);
3850
3851 out_unlock:
3852         mutex_unlock(&mvm->mutex);
3853
3854         return ret;
3855 }
3856
3857 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3858                               struct ieee80211_vif *vif, u32 queues, bool drop)
3859 {
3860         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3861         struct iwl_mvm_vif *mvmvif;
3862         struct iwl_mvm_sta *mvmsta;
3863         struct ieee80211_sta *sta;
3864         int i;
3865         u32 msk = 0;
3866
3867         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3868                 return;
3869
3870         /* Make sure we're done with the deferred traffic before flushing */
3871         if (iwl_mvm_is_dqa_supported(mvm))
3872                 flush_work(&mvm->add_stream_wk);
3873
3874         mutex_lock(&mvm->mutex);
3875         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3876
3877         /* flush the AP-station and all TDLS peers */
3878         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3879                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3880                                                 lockdep_is_held(&mvm->mutex));
3881                 if (IS_ERR_OR_NULL(sta))
3882                         continue;
3883
3884                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3885                 if (mvmsta->vif != vif)
3886                         continue;
3887
3888                 /* make sure only TDLS peers or the AP are flushed */
3889                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3890
3891                 msk |= mvmsta->tfd_queue_msk;
3892         }
3893
3894         if (drop) {
3895                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3896                         IWL_ERR(mvm, "flush request fail\n");
3897                 mutex_unlock(&mvm->mutex);
3898         } else {
3899                 mutex_unlock(&mvm->mutex);
3900
3901                 /* this can take a while, and we may need/want other operations
3902                  * to succeed while doing this, so do it without the mutex held
3903                  */
3904                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3905         }
3906 }
3907
3908 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3909                                   struct survey_info *survey)
3910 {
3911         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3912         int ret;
3913
3914         memset(survey, 0, sizeof(*survey));
3915
3916         /* only support global statistics right now */
3917         if (idx != 0)
3918                 return -ENOENT;
3919
3920         if (!fw_has_capa(&mvm->fw->ucode_capa,
3921                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3922                 return -ENOENT;
3923
3924         mutex_lock(&mvm->mutex);
3925
3926         if (mvm->ucode_loaded) {
3927                 ret = iwl_mvm_request_statistics(mvm, false);
3928                 if (ret)
3929                         goto out;
3930         }
3931
3932         survey->filled = SURVEY_INFO_TIME |
3933                          SURVEY_INFO_TIME_RX |
3934                          SURVEY_INFO_TIME_TX |
3935                          SURVEY_INFO_TIME_SCAN;
3936         survey->time = mvm->accu_radio_stats.on_time_rf +
3937                        mvm->radio_stats.on_time_rf;
3938         do_div(survey->time, USEC_PER_MSEC);
3939
3940         survey->time_rx = mvm->accu_radio_stats.rx_time +
3941                           mvm->radio_stats.rx_time;
3942         do_div(survey->time_rx, USEC_PER_MSEC);
3943
3944         survey->time_tx = mvm->accu_radio_stats.tx_time +
3945                           mvm->radio_stats.tx_time;
3946         do_div(survey->time_tx, USEC_PER_MSEC);
3947
3948         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3949                             mvm->radio_stats.on_time_scan;
3950         do_div(survey->time_scan, USEC_PER_MSEC);
3951
3952         ret = 0;
3953  out:
3954         mutex_unlock(&mvm->mutex);
3955         return ret;
3956 }
3957
3958 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3959                                        struct ieee80211_vif *vif,
3960                                        struct ieee80211_sta *sta,
3961                                        struct station_info *sinfo)
3962 {
3963         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3964         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3965         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3966
3967         if (mvmsta->avg_energy) {
3968                 sinfo->signal_avg = mvmsta->avg_energy;
3969                 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
3970         }
3971
3972         if (!fw_has_capa(&mvm->fw->ucode_capa,
3973                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3974                 return;
3975
3976         /* if beacon filtering isn't on mac80211 does it anyway */
3977         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3978                 return;
3979
3980         if (!vif->bss_conf.assoc)
3981                 return;
3982
3983         mutex_lock(&mvm->mutex);
3984
3985         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3986                 goto unlock;
3987
3988         if (iwl_mvm_request_statistics(mvm, false))
3989                 goto unlock;
3990
3991         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3992                            mvmvif->beacon_stats.accu_num_beacons;
3993         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3994         if (mvmvif->beacon_stats.avg_signal) {
3995                 /* firmware only reports a value after RXing a few beacons */
3996                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3997                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3998         }
3999  unlock:
4000         mutex_unlock(&mvm->mutex);
4001 }
4002
4003 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4004                                         struct ieee80211_vif *vif,
4005                                         const struct ieee80211_event *event)
4006 {
4007 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4008         do {                                                    \
4009                 if ((_cnt) && --(_cnt))                         \
4010                         break;                                  \
4011                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4012         } while (0)
4013
4014         struct iwl_fw_dbg_trigger_tlv *trig;
4015         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4016
4017         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4018                 return;
4019
4020         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4021         trig_mlme = (void *)trig->data;
4022         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4023                 return;
4024
4025         if (event->u.mlme.data == ASSOC_EVENT) {
4026                 if (event->u.mlme.status == MLME_DENIED)
4027                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4028                                            trig_mlme->stop_assoc_denied,
4029                                            "DENIED ASSOC: reason %d",
4030                                             event->u.mlme.reason);
4031                 else if (event->u.mlme.status == MLME_TIMEOUT)
4032                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4033                                            trig_mlme->stop_assoc_timeout,
4034                                            "ASSOC TIMEOUT");
4035         } else if (event->u.mlme.data == AUTH_EVENT) {
4036                 if (event->u.mlme.status == MLME_DENIED)
4037                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4038                                            trig_mlme->stop_auth_denied,
4039                                            "DENIED AUTH: reason %d",
4040                                            event->u.mlme.reason);
4041                 else if (event->u.mlme.status == MLME_TIMEOUT)
4042                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4043                                            trig_mlme->stop_auth_timeout,
4044                                            "AUTH TIMEOUT");
4045         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4046                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4047                                    trig_mlme->stop_rx_deauth,
4048                                    "DEAUTH RX %d", event->u.mlme.reason);
4049         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4050                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4051                                    trig_mlme->stop_tx_deauth,
4052                                    "DEAUTH TX %d", event->u.mlme.reason);
4053         }
4054 #undef CHECK_MLME_TRIGGER
4055 }
4056
4057 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4058                                           struct ieee80211_vif *vif,
4059                                           const struct ieee80211_event *event)
4060 {
4061         struct iwl_fw_dbg_trigger_tlv *trig;
4062         struct iwl_fw_dbg_trigger_ba *ba_trig;
4063
4064         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4065                 return;
4066
4067         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4068         ba_trig = (void *)trig->data;
4069         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4070                 return;
4071
4072         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4073                 return;
4074
4075         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4076                                     "BAR received from %pM, tid %d, ssn %d",
4077                                     event->u.ba.sta->addr, event->u.ba.tid,
4078                                     event->u.ba.ssn);
4079 }
4080
4081 static void
4082 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4083                                      struct ieee80211_vif *vif,
4084                                      const struct ieee80211_event *event)
4085 {
4086         struct iwl_fw_dbg_trigger_tlv *trig;
4087         struct iwl_fw_dbg_trigger_ba *ba_trig;
4088
4089         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4090                 return;
4091
4092         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4093         ba_trig = (void *)trig->data;
4094         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4095                 return;
4096
4097         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4098                 return;
4099
4100         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4101                                     "Frame from %pM timed out, tid %d",
4102                                     event->u.ba.sta->addr, event->u.ba.tid);
4103 }
4104
4105 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4106                                        struct ieee80211_vif *vif,
4107                                        const struct ieee80211_event *event)
4108 {
4109         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4110
4111         switch (event->type) {
4112         case MLME_EVENT:
4113                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4114                 break;
4115         case BAR_RX_EVENT:
4116                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4117                 break;
4118         case BA_FRAME_TIMEOUT:
4119                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4120                 break;
4121         default:
4122                 break;
4123         }
4124 }
4125
4126 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4127                                      struct iwl_mvm_internal_rxq_notif *notif,
4128                                      u32 size)
4129 {
4130         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(notif_waitq);
4131         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4132         int ret;
4133
4134         lockdep_assert_held(&mvm->mutex);
4135
4136         if (!iwl_mvm_has_new_rx_api(mvm))
4137                 return;
4138
4139         notif->cookie = mvm->queue_sync_cookie;
4140
4141         if (notif->sync)
4142                 atomic_set(&mvm->queue_sync_counter,
4143                            mvm->trans->num_rx_queues);
4144
4145         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4146         if (ret) {
4147                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4148                 goto out;
4149         }
4150
4151         if (notif->sync)
4152                 ret = wait_event_timeout(notif_waitq,
4153                                          atomic_read(&mvm->queue_sync_counter) == 0,
4154                                          HZ);
4155         WARN_ON_ONCE(!ret);
4156
4157 out:
4158         atomic_set(&mvm->queue_sync_counter, 0);
4159         mvm->queue_sync_cookie++;
4160 }
4161
4162 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4163 {
4164         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4165         struct iwl_mvm_internal_rxq_notif data = {
4166                 .type = IWL_MVM_RXQ_EMPTY,
4167                 .sync = 1,
4168         };
4169
4170         mutex_lock(&mvm->mutex);
4171         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4172         mutex_unlock(&mvm->mutex);
4173 }
4174
4175 const struct ieee80211_ops iwl_mvm_hw_ops = {
4176         .tx = iwl_mvm_mac_tx,
4177         .ampdu_action = iwl_mvm_mac_ampdu_action,
4178         .start = iwl_mvm_mac_start,
4179         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4180         .stop = iwl_mvm_mac_stop,
4181         .add_interface = iwl_mvm_mac_add_interface,
4182         .remove_interface = iwl_mvm_mac_remove_interface,
4183         .config = iwl_mvm_mac_config,
4184         .prepare_multicast = iwl_mvm_prepare_multicast,
4185         .configure_filter = iwl_mvm_configure_filter,
4186         .config_iface_filter = iwl_mvm_config_iface_filter,
4187         .bss_info_changed = iwl_mvm_bss_info_changed,
4188         .hw_scan = iwl_mvm_mac_hw_scan,
4189         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4190         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4191         .sta_state = iwl_mvm_mac_sta_state,
4192         .sta_notify = iwl_mvm_mac_sta_notify,
4193         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4194         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4195         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4196         .sta_rc_update = iwl_mvm_sta_rc_update,
4197         .conf_tx = iwl_mvm_mac_conf_tx,
4198         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4199         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4200         .flush = iwl_mvm_mac_flush,
4201         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4202         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4203         .set_key = iwl_mvm_mac_set_key,
4204         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4205         .remain_on_channel = iwl_mvm_roc,
4206         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4207         .add_chanctx = iwl_mvm_add_chanctx,
4208         .remove_chanctx = iwl_mvm_remove_chanctx,
4209         .change_chanctx = iwl_mvm_change_chanctx,
4210         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4211         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4212         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4213
4214         .start_ap = iwl_mvm_start_ap_ibss,
4215         .stop_ap = iwl_mvm_stop_ap_ibss,
4216         .join_ibss = iwl_mvm_start_ap_ibss,
4217         .leave_ibss = iwl_mvm_stop_ap_ibss,
4218
4219         .set_tim = iwl_mvm_set_tim,
4220
4221         .channel_switch = iwl_mvm_channel_switch,
4222         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4223         .post_channel_switch = iwl_mvm_post_channel_switch,
4224
4225         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4226         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4227         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4228
4229         .event_callback = iwl_mvm_mac_event_callback,
4230
4231         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4232
4233         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4234
4235 #ifdef CONFIG_PM_SLEEP
4236         /* look at d3.c */
4237         .suspend = iwl_mvm_suspend,
4238         .resume = iwl_mvm_resume,
4239         .set_wakeup = iwl_mvm_set_wakeup,
4240         .set_rekey_data = iwl_mvm_set_rekey_data,
4241 #if IS_ENABLED(CONFIG_IPV6)
4242         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4243 #endif
4244         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4245 #endif
4246         .get_survey = iwl_mvm_mac_get_survey,
4247         .sta_statistics = iwl_mvm_mac_sta_statistics,
4248 };