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

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