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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
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  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
  25  *
  26  * The full GNU General Public License is included in this distribution
  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  37  * All rights reserved.
  38  *
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  40  * modification, are permitted provided that the following conditions
  41  * are met:
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  43  *  * Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  *  * Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in
  47  *    the documentation and/or other materials provided with the
  48  *    distribution.
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  50  *    contributors may be used to endorse or promote products derived
  51  *    from this software without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  54  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  55  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  56  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  57  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  58  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  59  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  60  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  61  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  62  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  63  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  64  *
  65  *****************************************************************************/
  66 #include <linux/kernel.h>
  67 #include <linux/slab.h>
  68 #include <linux/skbuff.h>
  69 #include <linux/netdevice.h>
  70 #include <linux/etherdevice.h>
  71 #include <linux/ip.h>
  72 #include <linux/if_arp.h>
  73 #include <linux/time.h>
  74 #include <net/mac80211.h>
  75 #include <net/ieee80211_radiotap.h>
  76 #include <net/tcp.h>
  77
  78 #include "iwl-op-mode.h"
  79 #include "iwl-io.h"
  80 #include "mvm.h"
  81 #include "sta.h"
  82 #include "time-event.h"
  83 #include "iwl-eeprom-parse.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88 #include "iwl-nvm-parse.h"
  89 #include "fw-dbg.h"
  90
  91 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  92         {
  93                 .max = 1,
  94                 .types = BIT(NL80211_IFTYPE_STATION),
  95         },
  96         {
  97                 .max = 1,
  98                 .types = BIT(NL80211_IFTYPE_AP) |
  99                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 100                         BIT(NL80211_IFTYPE_P2P_GO),
 101         },
 102         {
 103                 .max = 1,
 104                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 105         },
 106 };
 107
 108 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 109         {
 110                 .num_different_channels = 2,
 111                 .max_interfaces = 3,
 112                 .limits = iwl_mvm_limits,
 113                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 114         },
 115 };
 116
 117 #ifdef CONFIG_PM_SLEEP
 118 static const struct nl80211_wowlan_tcp_data_token_feature
 119 iwl_mvm_wowlan_tcp_token_feature = {
 120         .min_len = 0,
 121         .max_len = 255,
 122         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 123 };
 124
 125 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 126         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 127         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 128                             sizeof(struct ethhdr) -
 129                             sizeof(struct iphdr) -
 130                             sizeof(struct tcphdr),
 131         .data_interval_max = 65535, /* __le16 in API */
 132         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 133                             sizeof(struct ethhdr) -
 134                             sizeof(struct iphdr) -
 135                             sizeof(struct tcphdr),
 136         .seq = true,
 137 };
 138 #endif
 139
 140 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 141 /*
 142  * Use the reserved field to indicate magic values.
 143  * these values will only be used internally by the driver,
 144  * and won't make it to the fw (reserved will be 0).
 145  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 146  *      be the vif's ip address. in case there is not a single
 147  *      ip address (0, or more than 1), this attribute will
 148  *      be skipped.
 149  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 150  *      the LSB bytes of the vif's mac address
 151  */
 152 enum {
 153         BC_FILTER_MAGIC_NONE = 0,
 154         BC_FILTER_MAGIC_IP,
 155         BC_FILTER_MAGIC_MAC,
 156 };
 157
 158 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 159         {
 160                 /* arp */
 161                 .discard = 0,
 162                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 163                 .attrs = {
 164                         {
 165                                 /* frame type - arp, hw type - ethernet */
 166                                 .offset_type =
 167                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 168                                 .offset = sizeof(rfc1042_header),
 169                                 .val = cpu_to_be32(0x08060001),
 170                                 .mask = cpu_to_be32(0xffffffff),
 171                         },
 172                         {
 173                                 /* arp dest ip */
 174                                 .offset_type =
 175                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 176                                 .offset = sizeof(rfc1042_header) + 2 +
 177                                           sizeof(struct arphdr) +
 178                                           ETH_ALEN + sizeof(__be32) +
 179                                           ETH_ALEN,
 180                                 .mask = cpu_to_be32(0xffffffff),
 181                                 /* mark it as special field */
 182                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 183                         },
 184                 },
 185         },
 186         {
 187                 /* dhcp offer bcast */
 188                 .discard = 0,
 189                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 190                 .attrs = {
 191                         {
 192                                 /* udp dest port - 68 (bootp client)*/
 193                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 194                                 .offset = offsetof(struct udphdr, dest),
 195                                 .val = cpu_to_be32(0x00440000),
 196                                 .mask = cpu_to_be32(0xffff0000),
 197                         },
 198                         {
 199                                 /* dhcp - lsb bytes of client hw address */
 200                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 201                                 .offset = 38,
 202                                 .mask = cpu_to_be32(0xffffffff),
 203                                 /* mark it as special field */
 204                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 205                         },
 206                 },
 207         },
 208         /* last filter must be empty */
 209         {},
 210 };
 211 #endif
 212
 213 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 214 {
 215         if (!iwl_mvm_is_d0i3_supported(mvm))
 216                 return;
 217
 218         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 219         spin_lock_bh(&mvm->refs_lock);
 220         mvm->refs[ref_type]++;
 221         spin_unlock_bh(&mvm->refs_lock);
 222         iwl_trans_ref(mvm->trans);
 223 }
 224
 225 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 226 {
 227         if (!iwl_mvm_is_d0i3_supported(mvm))
 228                 return;
 229
 230         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 231         spin_lock_bh(&mvm->refs_lock);
 232         if (WARN_ON(!mvm->refs[ref_type])) {
 233                 spin_unlock_bh(&mvm->refs_lock);
 234                 return;
 235         }
 236         mvm->refs[ref_type]--;
 237         spin_unlock_bh(&mvm->refs_lock);
 238         iwl_trans_unref(mvm->trans);
 239 }
 240
 241 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 242                                      enum iwl_mvm_ref_type except_ref)
 243 {
 244         int i, j;
 245
 246         if (!iwl_mvm_is_d0i3_supported(mvm))
 247                 return;
 248
 249         spin_lock_bh(&mvm->refs_lock);
 250         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 251                 if (except_ref == i || !mvm->refs[i])
 252                         continue;
 253
 254                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 255                               i, mvm->refs[i]);
 256                 for (j = 0; j < mvm->refs[i]; j++)
 257                         iwl_trans_unref(mvm->trans);
 258                 mvm->refs[i] = 0;
 259         }
 260         spin_unlock_bh(&mvm->refs_lock);
 261 }
 262
 263 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 264 {
 265         int i;
 266         bool taken = false;
 267
 268         if (!iwl_mvm_is_d0i3_supported(mvm))
 269                 return true;
 270
 271         spin_lock_bh(&mvm->refs_lock);
 272         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 273                 if (mvm->refs[i]) {
 274                         taken = true;
 275                         break;
 276                 }
 277         }
 278         spin_unlock_bh(&mvm->refs_lock);
 279
 280         return taken;
 281 }
 282
 283 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 284 {
 285         iwl_mvm_ref(mvm, ref_type);
 286
 287         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 288                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 289                                 HZ)) {
 290                 WARN_ON_ONCE(1);
 291                 iwl_mvm_unref(mvm, ref_type);
 292                 return -EIO;
 293         }
 294
 295         return 0;
 296 }
 297
 298 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 299 {
 300         int i;
 301
 302         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 303         for (i = 0; i < NUM_PHY_CTX; i++) {
 304                 mvm->phy_ctxts[i].id = i;
 305                 mvm->phy_ctxts[i].ref = 0;
 306         }
 307 }
 308
 309 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 310                                                   const char *alpha2,
 311                                                   enum iwl_mcc_source src_id,
 312                                                   bool *changed)
 313 {
 314         struct ieee80211_regdomain *regd = NULL;
 315         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 316         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 317         struct iwl_mcc_update_resp *resp;
 318
 319         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 320
 321         lockdep_assert_held(&mvm->mutex);
 322
 323         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 324         if (IS_ERR_OR_NULL(resp)) {
 325                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 326                               PTR_ERR_OR_ZERO(resp));
 327                 goto out;
 328         }
 329
 330         if (changed)
 331                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 332
 333         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 334                                       __le32_to_cpu(resp->n_channels),
 335                                       resp->channels,
 336                                       __le16_to_cpu(resp->mcc));
 337         /* Store the return source id */
 338         src_id = resp->source_id;
 339         kfree(resp);
 340         if (IS_ERR_OR_NULL(regd)) {
 341                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 342                               PTR_ERR_OR_ZERO(regd));
 343                 goto out;
 344         }
 345
 346         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 347                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 348         mvm->lar_regdom_set = true;
 349         mvm->mcc_src = src_id;
 350
 351 out:
 352         return regd;
 353 }
 354
 355 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 356 {
 357         bool changed;
 358         struct ieee80211_regdomain *regd;
 359
 360         if (!iwl_mvm_is_lar_supported(mvm))
 361                 return;
 362
 363         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 364         if (!IS_ERR_OR_NULL(regd)) {
 365                 /* only update the regulatory core if changed */
 366                 if (changed)
 367                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 368
 369                 kfree(regd);
 370         }
 371 }
 372
 373 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 374                                                           bool *changed)
 375 {
 376         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 377                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 378                                      MCC_SOURCE_GET_CURRENT :
 379                                      MCC_SOURCE_OLD_FW, changed);
 380 }
 381
 382 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 383 {
 384         enum iwl_mcc_source used_src;
 385         struct ieee80211_regdomain *regd;
 386         int ret;
 387         bool changed;
 388         const struct ieee80211_regdomain *r =
 389                         rtnl_dereference(mvm->hw->wiphy->regd);
 390
 391         if (!r)
 392                 return -ENOENT;
 393
 394         /* save the last source in case we overwrite it below */
 395         used_src = mvm->mcc_src;
 396         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 397                 /* Notify the firmware we support wifi location updates */
 398                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 399                 if (!IS_ERR_OR_NULL(regd))
 400                         kfree(regd);
 401         }
 402
 403         /* Now set our last stored MCC and source */
 404         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 405                                      &changed);
 406         if (IS_ERR_OR_NULL(regd))
 407                 return -EIO;
 408
 409         /* update cfg80211 if the regdomain was changed */
 410         if (changed)
 411                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 412         else
 413                 ret = 0;
 414
 415         kfree(regd);
 416         return ret;
 417 }
 418
 419 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 420 {
 421         struct ieee80211_hw *hw = mvm->hw;
 422         int num_mac, ret, i;
 423         static const u32 mvm_ciphers[] = {
 424                 WLAN_CIPHER_SUITE_WEP40,
 425                 WLAN_CIPHER_SUITE_WEP104,
 426                 WLAN_CIPHER_SUITE_TKIP,
 427                 WLAN_CIPHER_SUITE_CCMP,
 428         };
 429
 430         /* Tell mac80211 our characteristics */
 431         ieee80211_hw_set(hw, SIGNAL_DBM);
 432         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 433         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 434         ieee80211_hw_set(hw, QUEUE_CONTROL);
 435         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 436         ieee80211_hw_set(hw, SUPPORTS_PS);
 437         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 438         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 439         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 440         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 441         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 442         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 443         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 444         ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 445         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
 446         if (iwl_mvm_has_new_rx_api(mvm))
 447                 ieee80211_hw_set(hw, SUPPORTS_REORDERING_BUFFER);
 448
 449         if (mvm->trans->num_rx_queues > 1)
 450                 ieee80211_hw_set(hw, USES_RSS);
 451
 452         if (mvm->trans->max_skb_frags)
 453                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 454
 455         if (!iwl_mvm_is_dqa_supported(mvm))
 456                 hw->queues = mvm->first_agg_queue;
 457         else
 458                 hw->queues = IEEE80211_MAX_QUEUES;
 459         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 460         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 461                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 462         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 463                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 464         hw->rate_control_algorithm = "iwl-mvm-rs";
 465         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 466         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 467
 468         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 6);
 469         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 470         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 471         hw->wiphy->cipher_suites = mvm->ciphers;
 472
 473         if (iwl_mvm_has_new_rx_api(mvm)) {
 474                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 475                         WLAN_CIPHER_SUITE_GCMP;
 476                 hw->wiphy->n_cipher_suites++;
 477                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 478                         WLAN_CIPHER_SUITE_GCMP_256;
 479                 hw->wiphy->n_cipher_suites++;
 480         }
 481
 482         /*
 483          * Enable 11w if advertised by firmware and software crypto
 484          * is not enabled (as the firmware will interpret some mgmt
 485          * packets, so enabling it with software crypto isn't safe)
 486          */
 487         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 488             !iwlwifi_mod_params.sw_crypto) {
 489                 ieee80211_hw_set(hw, MFP_CAPABLE);
 490                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 491                         WLAN_CIPHER_SUITE_AES_CMAC;
 492                 hw->wiphy->n_cipher_suites++;
 493                 if (iwl_mvm_has_new_rx_api(mvm)) {
 494                         mvm->ciphers[hw->wiphy->n_cipher_suites] =
 495                                 WLAN_CIPHER_SUITE_BIP_GMAC_128;
 496                         hw->wiphy->n_cipher_suites++;
 497                         mvm->ciphers[hw->wiphy->n_cipher_suites] =
 498                                 WLAN_CIPHER_SUITE_BIP_GMAC_256;
 499                         hw->wiphy->n_cipher_suites++;
 500                 }
 501         }
 502
 503         /* currently FW API supports only one optional cipher scheme */
 504         if (mvm->fw->cs[0].cipher) {
 505                 const struct iwl_fw_cipher_scheme *fwcs = &mvm->fw->cs[0];
 506                 struct ieee80211_cipher_scheme *cs = &mvm->cs[0];
 507
 508                 mvm->hw->n_cipher_schemes = 1;
 509
 510                 cs->cipher = le32_to_cpu(fwcs->cipher);
 511                 cs->iftype = BIT(NL80211_IFTYPE_STATION);
 512                 cs->hdr_len = fwcs->hdr_len;
 513                 cs->pn_len = fwcs->pn_len;
 514                 cs->pn_off = fwcs->pn_off;
 515                 cs->key_idx_off = fwcs->key_idx_off;
 516                 cs->key_idx_mask = fwcs->key_idx_mask;
 517                 cs->key_idx_shift = fwcs->key_idx_shift;
 518                 cs->mic_len = fwcs->mic_len;
 519
 520                 mvm->hw->cipher_schemes = mvm->cs;
 521                 mvm->ciphers[hw->wiphy->n_cipher_suites] = cs->cipher;
 522                 hw->wiphy->n_cipher_suites++;
 523         }
 524
 525         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 526         hw->wiphy->features |=
 527                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 528                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 529                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 530
 531         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 532         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 533         hw->chanctx_data_size = sizeof(u16);
 534
 535         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 536                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 537                 BIT(NL80211_IFTYPE_AP) |
 538                 BIT(NL80211_IFTYPE_P2P_GO) |
 539                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 540                 BIT(NL80211_IFTYPE_ADHOC);
 541
 542         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 543         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 544         if (iwl_mvm_is_lar_supported(mvm))
 545                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 546         else
 547                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 548                                                REGULATORY_DISABLE_BEACON_HINTS;
 549
 550         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 551                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 552
 553         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 554
 555         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 556         hw->wiphy->n_iface_combinations =
 557                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 558
 559         hw->wiphy->max_remain_on_channel_duration = 10000;
 560         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 561         /* we can compensate an offset of up to 3 channels = 15 MHz */
 562         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 563
 564         /* Extract MAC address */
 565         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 566         hw->wiphy->addresses = mvm->addresses;
 567         hw->wiphy->n_addresses = 1;
 568
 569         /* Extract additional MAC addresses if available */
 570         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 571                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 572
 573         for (i = 1; i < num_mac; i++) {
 574                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 575                        ETH_ALEN);
 576                 mvm->addresses[i].addr[5]++;
 577                 hw->wiphy->n_addresses++;
 578         }
 579
 580         iwl_mvm_reset_phy_ctxts(mvm);
 581
 582         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 583
 584         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 585
 586         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 587         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 588                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 589
 590         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 591                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 592         else
 593                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 594
 595         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 596                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 597                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 598         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 599                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 600                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 601
 602                 if (fw_has_capa(&mvm->fw->ucode_capa,
 603                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 604                     fw_has_api(&mvm->fw->ucode_capa,
 605                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 606                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 607                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 608         }
 609
 610         hw->wiphy->hw_version = mvm->trans->hw_id;
 611
 612         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 613                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 614         else
 615                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 616
 617         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 618         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 619         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 620         /* we create the 802.11 header and zero length SSID IE. */
 621         hw->wiphy->max_sched_scan_ie_len =
 622                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 623         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 624         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 625
 626         /*
 627          * the firmware uses u8 for num of iterations, but 0xff is saved for
 628          * infinite loop, so the maximum number of iterations is actually 254.
 629          */
 630         hw->wiphy->max_sched_scan_plan_iterations = 254;
 631
 632         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 633                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 634                                NL80211_FEATURE_P2P_GO_OPPPS |
 635                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
 636                                NL80211_FEATURE_DYNAMIC_SMPS |
 637                                NL80211_FEATURE_STATIC_SMPS |
 638                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 639
 640         if (fw_has_capa(&mvm->fw->ucode_capa,
 641                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 642                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 643         if (fw_has_capa(&mvm->fw->ucode_capa,
 644                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 645                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 646
 647         if (fw_has_capa(&mvm->fw->ucode_capa,
 648                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 649                 hw->wiphy->features |=
 650                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 651
 652         if (fw_has_capa(&mvm->fw->ucode_capa,
 653                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 654                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 655
 656         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 657
 658 #ifdef CONFIG_PM_SLEEP
 659         if (iwl_mvm_is_d0i3_supported(mvm) &&
 660             device_can_wakeup(mvm->trans->dev)) {
 661                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 662                 hw->wiphy->wowlan = &mvm->wowlan;
 663         }
 664
 665         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 666             mvm->trans->ops->d3_suspend &&
 667             mvm->trans->ops->d3_resume &&
 668             device_can_wakeup(mvm->trans->dev)) {
 669                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 670                                      WIPHY_WOWLAN_DISCONNECT |
 671                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 672                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 673                                      WIPHY_WOWLAN_NET_DETECT;
 674                 if (!iwlwifi_mod_params.sw_crypto)
 675                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 676                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 677                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 678
 679                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 680                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 681                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 682                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 683                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 684                 hw->wiphy->wowlan = &mvm->wowlan;
 685         }
 686 #endif
 687
 688 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 689         /* assign default bcast filtering configuration */
 690         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 691 #endif
 692
 693         ret = iwl_mvm_leds_init(mvm);
 694         if (ret)
 695                 return ret;
 696
 697         if (fw_has_capa(&mvm->fw->ucode_capa,
 698                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 699                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 700                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 701                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 702         }
 703
 704         if (fw_has_capa(&mvm->fw->ucode_capa,
 705                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 706                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 707                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 708         }
 709
 710         hw->netdev_features |= mvm->cfg->features;
 711         if (!iwl_mvm_is_csum_supported(mvm)) {
 712                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 713                                          NETIF_F_RXCSUM);
 714                 /* We may support SW TX CSUM */
 715                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 716                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 717         }
 718
 719         ret = ieee80211_register_hw(mvm->hw);
 720         if (ret)
 721                 iwl_mvm_leds_exit(mvm);
 722
 723         return ret;
 724 }
 725
 726 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 727                              struct ieee80211_sta *sta,
 728                              struct sk_buff *skb)
 729 {
 730         struct iwl_mvm_sta *mvmsta;
 731         bool defer = false;
 732
 733         /*
 734          * double check the IN_D0I3 flag both before and after
 735          * taking the spinlock, in order to prevent taking
 736          * the spinlock when not needed.
 737          */
 738         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 739                 return false;
 740
 741         spin_lock(&mvm->d0i3_tx_lock);
 742         /*
 743          * testing the flag again ensures the skb dequeue
 744          * loop (on d0i3 exit) hasn't run yet.
 745          */
 746         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 747                 goto out;
 748
 749         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 750         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 751             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 752                 goto out;
 753
 754         __skb_queue_tail(&mvm->d0i3_tx, skb);
 755         ieee80211_stop_queues(mvm->hw);
 756
 757         /* trigger wakeup */
 758         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 759         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 760
 761         defer = true;
 762 out:
 763         spin_unlock(&mvm->d0i3_tx_lock);
 764         return defer;
 765 }
 766
 767 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 768                            struct ieee80211_tx_control *control,
 769                            struct sk_buff *skb)
 770 {
 771         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 772         struct ieee80211_sta *sta = control->sta;
 773         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 774         struct ieee80211_hdr *hdr = (void *)skb->data;
 775
 776         if (iwl_mvm_is_radio_killed(mvm)) {
 777                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 778                 goto drop;
 779         }
 780
 781         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 782             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 783             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 784                 goto drop;
 785
 786         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 787         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 788                      ieee80211_is_mgmt(hdr->frame_control) &&
 789                      !ieee80211_is_deauth(hdr->frame_control) &&
 790                      !ieee80211_is_disassoc(hdr->frame_control) &&
 791                      !ieee80211_is_action(hdr->frame_control)))
 792                 sta = NULL;
 793
 794         if (sta) {
 795                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 796                         return;
 797                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 798                         goto drop;
 799                 return;
 800         }
 801
 802         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 803                 goto drop;
 804         return;
 805  drop:
 806         ieee80211_free_txskb(hw, skb);
 807 }
 808
 809 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 810 {
 811         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 812                 return false;
 813         return true;
 814 }
 815
 816 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 817 {
 818         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 819                 return false;
 820         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 821                 return true;
 822
 823         /* enabled by default */
 824         return true;
 825 }
 826
 827 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 828         do {                                                    \
 829                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 830                         break;                                  \
 831                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 832         } while (0)
 833
 834 static void
 835 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 836                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 837                             enum ieee80211_ampdu_mlme_action action)
 838 {
 839         struct iwl_fw_dbg_trigger_tlv *trig;
 840         struct iwl_fw_dbg_trigger_ba *ba_trig;
 841
 842         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 843                 return;
 844
 845         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 846         ba_trig = (void *)trig->data;
 847
 848         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 849                 return;
 850
 851         switch (action) {
 852         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 853                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 854                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 855
 856                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 857                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 858                                  sta->addr, tid, tid_data->ssn);
 859                 break;
 860                 }
 861         case IEEE80211_AMPDU_TX_STOP_CONT:
 862                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 863                                  "TX AGG STOP: MAC %pM tid %d\n",
 864                                  sta->addr, tid);
 865                 break;
 866         case IEEE80211_AMPDU_RX_START:
 867                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 868                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 869                                  sta->addr, tid, rx_ba_ssn);
 870                 break;
 871         case IEEE80211_AMPDU_RX_STOP:
 872                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 873                                  "RX AGG STOP: MAC %pM tid %d\n",
 874                                  sta->addr, tid);
 875                 break;
 876         default:
 877                 break;
 878         }
 879 }
 880
 881 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 882                                     struct ieee80211_vif *vif,
 883                                     struct ieee80211_ampdu_params *params)
 884 {
 885         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 886         int ret;
 887         bool tx_agg_ref = false;
 888         struct ieee80211_sta *sta = params->sta;
 889         enum ieee80211_ampdu_mlme_action action = params->action;
 890         u16 tid = params->tid;
 891         u16 *ssn = &params->ssn;
 892         u8 buf_size = params->buf_size;
 893         bool amsdu = params->amsdu;
 894         u16 timeout = params->timeout;
 895
 896         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 897                      sta->addr, tid, action);
 898
 899         if (!(mvm->nvm_data->sku_cap_11n_enable))
 900                 return -EACCES;
 901
 902         /* return from D0i3 before starting a new Tx aggregation */
 903         switch (action) {
 904         case IEEE80211_AMPDU_TX_START:
 905         case IEEE80211_AMPDU_TX_STOP_CONT:
 906         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 907         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 908         case IEEE80211_AMPDU_TX_OPERATIONAL:
 909                 /*
 910                  * for tx start, wait synchronously until D0i3 exit to
 911                  * get the correct sequence number for the tid.
 912                  * additionally, some other ampdu actions use direct
 913                  * target access, which is not handled automatically
 914                  * by the trans layer (unlike commands), so wait for
 915                  * d0i3 exit in these cases as well.
 916                  */
 917                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 918                 if (ret)
 919                         return ret;
 920
 921                 tx_agg_ref = true;
 922                 break;
 923         default:
 924                 break;
 925         }
 926
 927         mutex_lock(&mvm->mutex);
 928
 929         switch (action) {
 930         case IEEE80211_AMPDU_RX_START:
 931                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 932                         ret = -EINVAL;
 933                         break;
 934                 }
 935                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 936                                          timeout);
 937                 break;
 938         case IEEE80211_AMPDU_RX_STOP:
 939                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 940                                          timeout);
 941                 break;
 942         case IEEE80211_AMPDU_TX_START:
 943                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 944                         ret = -EINVAL;
 945                         break;
 946                 }
 947                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 948                 break;
 949         case IEEE80211_AMPDU_TX_STOP_CONT:
 950                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 951                 break;
 952         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 953         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 954                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 955                 break;
 956         case IEEE80211_AMPDU_TX_OPERATIONAL:
 957                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 958                                               buf_size, amsdu);
 959                 break;
 960         default:
 961                 WARN_ON_ONCE(1);
 962                 ret = -EINVAL;
 963                 break;
 964         }
 965
 966         if (!ret) {
 967                 u16 rx_ba_ssn = 0;
 968
 969                 if (action == IEEE80211_AMPDU_RX_START)
 970                         rx_ba_ssn = *ssn;
 971
 972                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 973                                             rx_ba_ssn, action);
 974         }
 975         mutex_unlock(&mvm->mutex);
 976
 977         /*
 978          * If the tid is marked as started, we won't use it for offloaded
 979          * traffic on the next D0i3 entry. It's safe to unref.
 980          */
 981         if (tx_agg_ref)
 982                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 983
 984         return ret;
 985 }
 986
 987 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 988                                      struct ieee80211_vif *vif)
 989 {
 990         struct iwl_mvm *mvm = data;
 991         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 992
 993         mvmvif->uploaded = false;
 994         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 995
 996         spin_lock_bh(&mvm->time_event_lock);
 997         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 998         spin_unlock_bh(&mvm->time_event_lock);
 999
1000         mvmvif->phy_ctxt = NULL;
1001         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
1002 }
1003
1004 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1005 {
1006         /* clear the D3 reconfig, we only need it to avoid dumping a
1007          * firmware coredump on reconfiguration, we shouldn't do that
1008          * on D3->D0 transition
1009          */
1010         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1011                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1012                 iwl_mvm_fw_error_dump(mvm);
1013         }
1014
1015         /* cleanup all stale references (scan, roc), but keep the
1016          * ucode_down ref until reconfig is complete
1017          */
1018         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1019
1020         iwl_mvm_stop_device(mvm);
1021
1022         mvm->scan_status = 0;
1023         mvm->ps_disabled = false;
1024         mvm->calibrating = false;
1025
1026         /* just in case one was running */
1027         iwl_mvm_cleanup_roc_te(mvm);
1028         ieee80211_remain_on_channel_expired(mvm->hw);
1029
1030         /*
1031          * cleanup all interfaces, even inactive ones, as some might have
1032          * gone down during the HW restart
1033          */
1034         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1035
1036         mvm->p2p_device_vif = NULL;
1037         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1038
1039         iwl_mvm_reset_phy_ctxts(mvm);
1040         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1041         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1042         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1043         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1044         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1045         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1046
1047         ieee80211_wake_queues(mvm->hw);
1048
1049         /* clear any stale d0i3 state */
1050         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1051
1052         mvm->vif_count = 0;
1053         mvm->rx_ba_sessions = 0;
1054         mvm->fw_dbg_conf = FW_DBG_INVALID;
1055
1056         /* keep statistics ticking */
1057         iwl_mvm_accu_radio_stats(mvm);
1058 }
1059
1060 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1061 {
1062         int ret;
1063
1064         lockdep_assert_held(&mvm->mutex);
1065
1066         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1067                 /* Clean up some internal and mac80211 state on restart */
1068                 iwl_mvm_restart_cleanup(mvm);
1069         } else {
1070                 /* Hold the reference to prevent runtime suspend while
1071                  * the start procedure runs.  It's a bit confusing
1072                  * that the UCODE_DOWN reference is taken, but it just
1073                  * means "UCODE is not UP yet". ( TODO: rename this
1074                  * reference).
1075                  */
1076                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1077         }
1078         ret = iwl_mvm_up(mvm);
1079
1080         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1081                 /* Something went wrong - we need to finish some cleanup
1082                  * that normally iwl_mvm_mac_restart_complete() below
1083                  * would do.
1084                  */
1085                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1086                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1087         }
1088
1089         return ret;
1090 }
1091
1092 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1093 {
1094         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1095         int ret;
1096
1097         /* Some hw restart cleanups must not hold the mutex */
1098         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1099                 /*
1100                  * Make sure we are out of d0i3. This is needed
1101                  * to make sure the reference accounting is correct
1102                  * (and there is no stale d0i3_exit_work).
1103                  */
1104                 wait_event_timeout(mvm->d0i3_exit_waitq,
1105                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1106                                              &mvm->status),
1107                                    HZ);
1108         }
1109
1110         mutex_lock(&mvm->mutex);
1111         ret = __iwl_mvm_mac_start(mvm);
1112         mutex_unlock(&mvm->mutex);
1113
1114         return ret;
1115 }
1116
1117 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1118 {
1119         int ret;
1120
1121         mutex_lock(&mvm->mutex);
1122
1123         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1124         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1125         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1126         if (ret)
1127                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1128                         ret);
1129
1130         /* allow transport/FW low power modes */
1131         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1132
1133         /*
1134          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1135          * of packets the FW sent out, so we must reconnect.
1136          */
1137         iwl_mvm_teardown_tdls_peers(mvm);
1138
1139         mutex_unlock(&mvm->mutex);
1140 }
1141
1142 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1143 {
1144         if (iwl_mvm_is_d0i3_supported(mvm) &&
1145             iwl_mvm_enter_d0i3_on_suspend(mvm))
1146                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1147                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1148                                                         &mvm->status),
1149                                               HZ),
1150                           "D0i3 exit on resume timed out\n");
1151 }
1152
1153 static void
1154 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1155                               enum ieee80211_reconfig_type reconfig_type)
1156 {
1157         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1158
1159         switch (reconfig_type) {
1160         case IEEE80211_RECONFIG_TYPE_RESTART:
1161                 iwl_mvm_restart_complete(mvm);
1162                 break;
1163         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1164                 iwl_mvm_resume_complete(mvm);
1165                 break;
1166         }
1167 }
1168
1169 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1170 {
1171         lockdep_assert_held(&mvm->mutex);
1172
1173         /* firmware counters are obviously reset now, but we shouldn't
1174          * partially track so also clear the fw_reset_accu counters.
1175          */
1176         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1177
1178         /* async_handlers_wk is now blocked */
1179
1180         /*
1181          * The work item could be running or queued if the
1182          * ROC time event stops just as we get here.
1183          */
1184         flush_work(&mvm->roc_done_wk);
1185
1186         iwl_mvm_stop_device(mvm);
1187
1188         iwl_mvm_async_handlers_purge(mvm);
1189         /* async_handlers_list is empty and will stay empty: HW is stopped */
1190
1191         /* the fw is stopped, the aux sta is dead: clean up driver state */
1192         iwl_mvm_del_aux_sta(mvm);
1193
1194         iwl_free_fw_paging(mvm);
1195
1196         /*
1197          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1198          * won't be called in this case).
1199          * But make sure to cleanup interfaces that have gone down before/during
1200          * HW restart was requested.
1201          */
1202         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1203                 ieee80211_iterate_interfaces(mvm->hw, 0,
1204                                              iwl_mvm_cleanup_iterator, mvm);
1205
1206         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1207          * make sure there's nothing left there and warn if any is found.
1208          */
1209         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1210                 int i;
1211
1212                 for (i = 0; i < mvm->max_scans; i++) {
1213                         if (WARN_ONCE(mvm->scan_uid_status[i],
1214                                       "UMAC scan UID %d status was not cleaned\n",
1215                                       i))
1216                                 mvm->scan_uid_status[i] = 0;
1217                 }
1218         }
1219 }
1220
1221 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1222 {
1223         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1224
1225         flush_work(&mvm->d0i3_exit_work);
1226         flush_work(&mvm->async_handlers_wk);
1227         flush_work(&mvm->add_stream_wk);
1228         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1229         cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork);
1230         cancel_delayed_work_sync(&mvm->scan_timeout_dwork);
1231         iwl_mvm_free_fw_dump_desc(mvm);
1232
1233         mutex_lock(&mvm->mutex);
1234         __iwl_mvm_mac_stop(mvm);
1235         mutex_unlock(&mvm->mutex);
1236
1237         /*
1238          * The worker might have been waiting for the mutex, let it run and
1239          * discover that its list is now empty.
1240          */
1241         cancel_work_sync(&mvm->async_handlers_wk);
1242 }
1243
1244 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1245 {
1246         u16 i;
1247
1248         lockdep_assert_held(&mvm->mutex);
1249
1250         for (i = 0; i < NUM_PHY_CTX; i++)
1251                 if (!mvm->phy_ctxts[i].ref)
1252                         return &mvm->phy_ctxts[i];
1253
1254         IWL_ERR(mvm, "No available PHY context\n");
1255         return NULL;
1256 }
1257
1258 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1259                                 s16 tx_power)
1260 {
1261         struct iwl_dev_tx_power_cmd cmd = {
1262                 .v3.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1263                 .v3.v2.mac_context_id =
1264                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1265                 .v3.v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1266         };
1267         int len = sizeof(cmd);
1268
1269         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1270                 cmd.v3.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1271
1272         if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK))
1273                 len = sizeof(cmd.v3);
1274         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1275                 len = sizeof(cmd.v3.v2);
1276
1277         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1278 }
1279
1280 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1281                                      struct ieee80211_vif *vif)
1282 {
1283         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1284         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1285         int ret;
1286
1287         mvmvif->mvm = mvm;
1288
1289         /*
1290          * make sure D0i3 exit is completed, otherwise a target access
1291          * during tx queue configuration could be done when still in
1292          * D0i3 state.
1293          */
1294         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1295         if (ret)
1296                 return ret;
1297
1298         /*
1299          * Not much to do here. The stack will not allow interface
1300          * types or combinations that we didn't advertise, so we
1301          * don't really have to check the types.
1302          */
1303
1304         mutex_lock(&mvm->mutex);
1305
1306         /* make sure that beacon statistics don't go backwards with FW reset */
1307         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1308                 mvmvif->beacon_stats.accu_num_beacons +=
1309                         mvmvif->beacon_stats.num_beacons;
1310
1311         /* Allocate resources for the MAC context, and add it to the fw  */
1312         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1313         if (ret)
1314                 goto out_unlock;
1315
1316         /* Counting number of interfaces is needed for legacy PM */
1317         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1318                 mvm->vif_count++;
1319
1320         /*
1321          * The AP binding flow can be done only after the beacon
1322          * template is configured (which happens only in the mac80211
1323          * start_ap() flow), and adding the broadcast station can happen
1324          * only after the binding.
1325          * In addition, since modifying the MAC before adding a bcast
1326          * station is not allowed by the FW, delay the adding of MAC context to
1327          * the point where we can also add the bcast station.
1328          * In short: there's not much we can do at this point, other than
1329          * allocating resources :)
1330          */
1331         if (vif->type == NL80211_IFTYPE_AP ||
1332             vif->type == NL80211_IFTYPE_ADHOC) {
1333                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1334                 if (ret) {
1335                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1336                         goto out_release;
1337                 }
1338
1339                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1340                 goto out_unlock;
1341         }
1342
1343         mvmvif->features |= hw->netdev_features;
1344
1345         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1346         if (ret)
1347                 goto out_release;
1348
1349         ret = iwl_mvm_power_update_mac(mvm);
1350         if (ret)
1351                 goto out_remove_mac;
1352
1353         /* beacon filtering */
1354         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1355         if (ret)
1356                 goto out_remove_mac;
1357
1358         if (!mvm->bf_allowed_vif &&
1359             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1360                 mvm->bf_allowed_vif = mvmvif;
1361                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1362                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1363         }
1364
1365         /*
1366          * P2P_DEVICE interface does not have a channel context assigned to it,
1367          * so a dedicated PHY context is allocated to it and the corresponding
1368          * MAC context is bound to it at this stage.
1369          */
1370         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1371
1372                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1373                 if (!mvmvif->phy_ctxt) {
1374                         ret = -ENOSPC;
1375                         goto out_free_bf;
1376                 }
1377
1378                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1379                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1380                 if (ret)
1381                         goto out_unref_phy;
1382
1383                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1384                 if (ret)
1385                         goto out_unbind;
1386
1387                 /* Save a pointer to p2p device vif, so it can later be used to
1388                  * update the p2p device MAC when a GO is started/stopped */
1389                 mvm->p2p_device_vif = vif;
1390         }
1391
1392         iwl_mvm_vif_dbgfs_register(mvm, vif);
1393         goto out_unlock;
1394
1395  out_unbind:
1396         iwl_mvm_binding_remove_vif(mvm, vif);
1397  out_unref_phy:
1398         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1399  out_free_bf:
1400         if (mvm->bf_allowed_vif == mvmvif) {
1401                 mvm->bf_allowed_vif = NULL;
1402                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1403                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1404         }
1405  out_remove_mac:
1406         mvmvif->phy_ctxt = NULL;
1407         iwl_mvm_mac_ctxt_remove(mvm, vif);
1408  out_release:
1409         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1410                 mvm->vif_count--;
1411
1412         iwl_mvm_mac_ctxt_release(mvm, vif);
1413  out_unlock:
1414         mutex_unlock(&mvm->mutex);
1415
1416         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1417
1418         return ret;
1419 }
1420
1421 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1422                                         struct ieee80211_vif *vif)
1423 {
1424         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1425
1426         if (tfd_msk) {
1427                 /*
1428                  * mac80211 first removes all the stations of the vif and
1429                  * then removes the vif. When it removes a station it also
1430                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1431                  * of all the stations of this vif are closed, and the queues
1432                  * of these AMPDU sessions are properly closed.
1433                  * We still need to take care of the shared queues of the vif.
1434                  * Flush them here.
1435                  */
1436                 mutex_lock(&mvm->mutex);
1437                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1438                 mutex_unlock(&mvm->mutex);
1439
1440                 /*
1441                  * There are transports that buffer a few frames in the host.
1442                  * For these, the flush above isn't enough since while we were
1443                  * flushing, the transport might have sent more frames to the
1444                  * device. To solve this, wait here until the transport is
1445                  * empty. Technically, this could have replaced the flush
1446                  * above, but flush is much faster than draining. So flush
1447                  * first, and drain to make sure we have no frames in the
1448                  * transport anymore.
1449                  * If a station still had frames on the shared queues, it is
1450                  * already marked as draining, so to complete the draining, we
1451                  * just need to wait until the transport is empty.
1452                  */
1453                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1454         }
1455
1456         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1457                 /*
1458                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1459                  * We assume here that all the packets sent to the OFFCHANNEL
1460                  * queue are sent in ROC session.
1461                  */
1462                 flush_work(&mvm->roc_done_wk);
1463         } else {
1464                 /*
1465                  * By now, all the AC queues are empty. The AGG queues are
1466                  * empty too. We already got all the Tx responses for all the
1467                  * packets in the queues. The drain work can have been
1468                  * triggered. Flush it.
1469                  */
1470                 flush_work(&mvm->sta_drained_wk);
1471         }
1472 }
1473
1474 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1475                                          struct ieee80211_vif *vif)
1476 {
1477         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1478         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1479
1480         iwl_mvm_prepare_mac_removal(mvm, vif);
1481
1482         mutex_lock(&mvm->mutex);
1483
1484         if (mvm->bf_allowed_vif == mvmvif) {
1485                 mvm->bf_allowed_vif = NULL;
1486                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1487                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1488         }
1489
1490         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1491
1492         /*
1493          * For AP/GO interface, the tear down of the resources allocated to the
1494          * interface is be handled as part of the stop_ap flow.
1495          */
1496         if (vif->type == NL80211_IFTYPE_AP ||
1497             vif->type == NL80211_IFTYPE_ADHOC) {
1498 #ifdef CONFIG_NL80211_TESTMODE
1499                 if (vif == mvm->noa_vif) {
1500                         mvm->noa_vif = NULL;
1501                         mvm->noa_duration = 0;
1502                 }
1503 #endif
1504                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1505                 goto out_release;
1506         }
1507
1508         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1509                 mvm->p2p_device_vif = NULL;
1510                 iwl_mvm_rm_bcast_sta(mvm, vif);
1511                 iwl_mvm_binding_remove_vif(mvm, vif);
1512                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1513                 mvmvif->phy_ctxt = NULL;
1514         }
1515
1516         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1517                 mvm->vif_count--;
1518
1519         iwl_mvm_power_update_mac(mvm);
1520         iwl_mvm_mac_ctxt_remove(mvm, vif);
1521
1522 out_release:
1523         iwl_mvm_mac_ctxt_release(mvm, vif);
1524         mutex_unlock(&mvm->mutex);
1525 }
1526
1527 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1528 {
1529         return 0;
1530 }
1531
1532 struct iwl_mvm_mc_iter_data {
1533         struct iwl_mvm *mvm;
1534         int port_id;
1535 };
1536
1537 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1538                                       struct ieee80211_vif *vif)
1539 {
1540         struct iwl_mvm_mc_iter_data *data = _data;
1541         struct iwl_mvm *mvm = data->mvm;
1542         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1543         int ret, len;
1544
1545         /* if we don't have free ports, mcast frames will be dropped */
1546         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1547                 return;
1548
1549         if (vif->type != NL80211_IFTYPE_STATION ||
1550             !vif->bss_conf.assoc)
1551                 return;
1552
1553         cmd->port_id = data->port_id++;
1554         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1555         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1556
1557         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1558         if (ret)
1559                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1560 }
1561
1562 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1563 {
1564         struct iwl_mvm_mc_iter_data iter_data = {
1565                 .mvm = mvm,
1566         };
1567
1568         lockdep_assert_held(&mvm->mutex);
1569
1570         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1571                 return;
1572
1573         ieee80211_iterate_active_interfaces_atomic(
1574                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1575                 iwl_mvm_mc_iface_iterator, &iter_data);
1576 }
1577
1578 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1579                                      struct netdev_hw_addr_list *mc_list)
1580 {
1581         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1582         struct iwl_mcast_filter_cmd *cmd;
1583         struct netdev_hw_addr *addr;
1584         int addr_count;
1585         bool pass_all;
1586         int len;
1587
1588         addr_count = netdev_hw_addr_list_count(mc_list);
1589         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1590                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1591         if (pass_all)
1592                 addr_count = 0;
1593
1594         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1595         cmd = kzalloc(len, GFP_ATOMIC);
1596         if (!cmd)
1597                 return 0;
1598
1599         if (pass_all) {
1600                 cmd->pass_all = 1;
1601                 return (u64)(unsigned long)cmd;
1602         }
1603
1604         netdev_hw_addr_list_for_each(addr, mc_list) {
1605                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1606                                    cmd->count, addr->addr);
1607                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1608                        addr->addr, ETH_ALEN);
1609                 cmd->count++;
1610         }
1611
1612         return (u64)(unsigned long)cmd;
1613 }
1614
1615 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1616                                      unsigned int changed_flags,
1617                                      unsigned int *total_flags,
1618                                      u64 multicast)
1619 {
1620         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1621         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1622
1623         mutex_lock(&mvm->mutex);
1624
1625         /* replace previous configuration */
1626         kfree(mvm->mcast_filter_cmd);
1627         mvm->mcast_filter_cmd = cmd;
1628
1629         if (!cmd)
1630                 goto out;
1631
1632         iwl_mvm_recalc_multicast(mvm);
1633 out:
1634         mutex_unlock(&mvm->mutex);
1635         *total_flags = 0;
1636 }
1637
1638 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1639                                         struct ieee80211_vif *vif,
1640                                         unsigned int filter_flags,
1641                                         unsigned int changed_flags)
1642 {
1643         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1644
1645         /* We support only filter for probe requests */
1646         if (!(changed_flags & FIF_PROBE_REQ))
1647                 return;
1648
1649         /* Supported only for p2p client interfaces */
1650         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1651             !vif->p2p)
1652                 return;
1653
1654         mutex_lock(&mvm->mutex);
1655         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1656         mutex_unlock(&mvm->mutex);
1657 }
1658
1659 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1660 struct iwl_bcast_iter_data {
1661         struct iwl_mvm *mvm;
1662         struct iwl_bcast_filter_cmd *cmd;
1663         u8 current_filter;
1664 };
1665
1666 static void
1667 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1668                          const struct iwl_fw_bcast_filter *in_filter,
1669                          struct iwl_fw_bcast_filter *out_filter)
1670 {
1671         struct iwl_fw_bcast_filter_attr *attr;
1672         int i;
1673
1674         memcpy(out_filter, in_filter, sizeof(*out_filter));
1675
1676         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1677                 attr = &out_filter->attrs[i];
1678
1679                 if (!attr->mask)
1680                         break;
1681
1682                 switch (attr->reserved1) {
1683                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1684                         if (vif->bss_conf.arp_addr_cnt != 1) {
1685                                 attr->mask = 0;
1686                                 continue;
1687                         }
1688
1689                         attr->val = vif->bss_conf.arp_addr_list[0];
1690                         break;
1691                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1692                         attr->val = *(__be32 *)&vif->addr[2];
1693                         break;
1694                 default:
1695                         break;
1696                 }
1697                 attr->reserved1 = 0;
1698                 out_filter->num_attrs++;
1699         }
1700 }
1701
1702 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1703                                           struct ieee80211_vif *vif)
1704 {
1705         struct iwl_bcast_iter_data *data = _data;
1706         struct iwl_mvm *mvm = data->mvm;
1707         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1708         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1709         struct iwl_fw_bcast_mac *bcast_mac;
1710         int i;
1711
1712         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1713                 return;
1714
1715         bcast_mac = &cmd->macs[mvmvif->id];
1716
1717         /*
1718          * enable filtering only for associated stations, but not for P2P
1719          * Clients
1720          */
1721         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1722             !vif->bss_conf.assoc)
1723                 return;
1724
1725         bcast_mac->default_discard = 1;
1726
1727         /* copy all configured filters */
1728         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1729                 /*
1730                  * Make sure we don't exceed our filters limit.
1731                  * if there is still a valid filter to be configured,
1732                  * be on the safe side and just allow bcast for this mac.
1733                  */
1734                 if (WARN_ON_ONCE(data->current_filter >=
1735                                  ARRAY_SIZE(cmd->filters))) {
1736                         bcast_mac->default_discard = 0;
1737                         bcast_mac->attached_filters = 0;
1738                         break;
1739                 }
1740
1741                 iwl_mvm_set_bcast_filter(vif,
1742                                          &mvm->bcast_filters[i],
1743                                          &cmd->filters[data->current_filter]);
1744
1745                 /* skip current filter if it contains no attributes */
1746                 if (!cmd->filters[data->current_filter].num_attrs)
1747                         continue;
1748
1749                 /* attach the filter to current mac */
1750                 bcast_mac->attached_filters |=
1751                                 cpu_to_le16(BIT(data->current_filter));
1752
1753                 data->current_filter++;
1754         }
1755 }
1756
1757 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1758                                     struct iwl_bcast_filter_cmd *cmd)
1759 {
1760         struct iwl_bcast_iter_data iter_data = {
1761                 .mvm = mvm,
1762                 .cmd = cmd,
1763         };
1764
1765         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1766                 return false;
1767
1768         memset(cmd, 0, sizeof(*cmd));
1769         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1770         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1771
1772 #ifdef CONFIG_IWLWIFI_DEBUGFS
1773         /* use debugfs filters/macs if override is configured */
1774         if (mvm->dbgfs_bcast_filtering.override) {
1775                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1776                        sizeof(cmd->filters));
1777                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1778                        sizeof(cmd->macs));
1779                 return true;
1780         }
1781 #endif
1782
1783         /* if no filters are configured, do nothing */
1784         if (!mvm->bcast_filters)
1785                 return false;
1786
1787         /* configure and attach these filters for each associated sta vif */
1788         ieee80211_iterate_active_interfaces(
1789                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1790                 iwl_mvm_bcast_filter_iterator, &iter_data);
1791
1792         return true;
1793 }
1794
1795 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1796 {
1797         struct iwl_bcast_filter_cmd cmd;
1798
1799         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1800                 return 0;
1801
1802         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1803                 return 0;
1804
1805         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1806                                     sizeof(cmd), &cmd);
1807 }
1808 #else
1809 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1810 {
1811         return 0;
1812 }
1813 #endif
1814
1815 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1816                                     struct ieee80211_vif *vif)
1817 {
1818         struct iwl_mu_group_mgmt_cmd cmd = {};
1819
1820         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1821                WLAN_MEMBERSHIP_LEN);
1822         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1823                WLAN_USER_POSITION_LEN);
1824
1825         return iwl_mvm_send_cmd_pdu(mvm,
1826                                     WIDE_ID(DATA_PATH_GROUP,
1827                                             UPDATE_MU_GROUPS_CMD),
1828                                     0, sizeof(cmd), &cmd);
1829 }
1830
1831 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1832                                            struct ieee80211_vif *vif)
1833 {
1834         if (vif->mu_mimo_owner) {
1835                 struct iwl_mu_group_mgmt_notif *notif = _data;
1836
1837                 /*
1838                  * MU-MIMO Group Id action frame is little endian. We treat
1839                  * the data received from firmware as if it came from the
1840                  * action frame, so no conversion is needed.
1841                  */
1842                 ieee80211_update_mu_groups(vif,
1843                                            (u8 *)&notif->membership_status,
1844                                            (u8 *)&notif->user_position);
1845         }
1846 }
1847
1848 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1849                                struct iwl_rx_cmd_buffer *rxb)
1850 {
1851         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1852         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1853
1854         ieee80211_iterate_active_interfaces_atomic(
1855                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1856                         iwl_mvm_mu_mimo_iface_iterator, notif);
1857 }
1858
1859 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1860                                              struct ieee80211_vif *vif,
1861                                              struct ieee80211_bss_conf *bss_conf,
1862                                              u32 changes)
1863 {
1864         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1865         int ret;
1866
1867         /*
1868          * Re-calculate the tsf id, as the master-slave relations depend on the
1869          * beacon interval, which was not known when the station interface was
1870          * added.
1871          */
1872         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1873                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1874
1875         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1876             mvmvif->lqm_active)
1877                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1878                                      0, 0);
1879
1880         /*
1881          * If we're not associated yet, take the (new) BSSID before associating
1882          * so the firmware knows. If we're already associated, then use the old
1883          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1884          * branch for disassociation below.
1885          */
1886         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1887                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1888
1889         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1890         if (ret)
1891                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1892
1893         /* after sending it once, adopt mac80211 data */
1894         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1895         mvmvif->associated = bss_conf->assoc;
1896
1897         if (changes & BSS_CHANGED_ASSOC) {
1898                 if (bss_conf->assoc) {
1899                         /* clear statistics to get clean beacon counter */
1900                         iwl_mvm_request_statistics(mvm, true);
1901                         memset(&mvmvif->beacon_stats, 0,
1902                                sizeof(mvmvif->beacon_stats));
1903
1904                         /* add quota for this interface */
1905                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1906                         if (ret) {
1907                                 IWL_ERR(mvm, "failed to update quotas\n");
1908                                 return;
1909                         }
1910
1911                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1912                                      &mvm->status)) {
1913                                 /*
1914                                  * If we're restarting then the firmware will
1915                                  * obviously have lost synchronisation with
1916                                  * the AP. It will attempt to synchronise by
1917                                  * itself, but we can make it more reliable by
1918                                  * scheduling a session protection time event.
1919                                  *
1920                                  * The firmware needs to receive a beacon to
1921                                  * catch up with synchronisation, use 110% of
1922                                  * the beacon interval.
1923                                  *
1924                                  * Set a large maximum delay to allow for more
1925                                  * than a single interface.
1926                                  */
1927                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1928                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1929                                                         5 * dur, false);
1930                         }
1931
1932                         iwl_mvm_sf_update(mvm, vif, false);
1933                         iwl_mvm_power_vif_assoc(mvm, vif);
1934                         if (vif->p2p) {
1935                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1936                                 iwl_mvm_update_smps(mvm, vif,
1937                                                     IWL_MVM_SMPS_REQ_PROT,
1938                                                     IEEE80211_SMPS_DYNAMIC);
1939                         }
1940                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1941                         /*
1942                          * If update fails - SF might be running in associated
1943                          * mode while disassociated - which is forbidden.
1944                          */
1945                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1946                                   "Failed to update SF upon disassociation\n");
1947
1948                         /* remove AP station now that the MAC is unassoc */
1949                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1950                         if (ret)
1951                                 IWL_ERR(mvm, "failed to remove AP station\n");
1952
1953                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1954                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1955                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1956                         /* remove quota for this interface */
1957                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1958                         if (ret)
1959                                 IWL_ERR(mvm, "failed to update quotas\n");
1960
1961                         if (vif->p2p)
1962                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1963
1964                         /* this will take the cleared BSSID from bss_conf */
1965                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1966                         if (ret)
1967                                 IWL_ERR(mvm,
1968                                         "failed to update MAC %pM (clear after unassoc)\n",
1969                                         vif->addr);
1970                 }
1971
1972                 /*
1973                  * The firmware tracks the MU-MIMO group on its own.
1974                  * However, on HW restart we should restore this data.
1975                  */
1976                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1977                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1978                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1979                         if (ret)
1980                                 IWL_ERR(mvm,
1981                                         "failed to update VHT MU_MIMO groups\n");
1982                 }
1983
1984                 iwl_mvm_recalc_multicast(mvm);
1985                 iwl_mvm_configure_bcast_filter(mvm);
1986
1987                 /* reset rssi values */
1988                 mvmvif->bf_data.ave_beacon_signal = 0;
1989
1990                 iwl_mvm_bt_coex_vif_change(mvm);
1991                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1992                                     IEEE80211_SMPS_AUTOMATIC);
1993                 if (fw_has_capa(&mvm->fw->ucode_capa,
1994                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1995                         iwl_mvm_config_scan(mvm);
1996         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1997                 /*
1998                  * We received a beacon _after_ association so
1999                  * remove the session protection.
2000                  */
2001                 iwl_mvm_remove_time_event(mvm, mvmvif,
2002                                           &mvmvif->time_event_data);
2003         }
2004
2005         if (changes & BSS_CHANGED_BEACON_INFO) {
2006                 iwl_mvm_sf_update(mvm, vif, false);
2007                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2008         }
2009
2010         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
2011                        /*
2012                         * Send power command on every beacon change,
2013                         * because we may have not enabled beacon abort yet.
2014                         */
2015                        BSS_CHANGED_BEACON_INFO)) {
2016                 ret = iwl_mvm_power_update_mac(mvm);
2017                 if (ret)
2018                         IWL_ERR(mvm, "failed to update power mode\n");
2019         }
2020
2021         if (changes & BSS_CHANGED_TXPOWER) {
2022                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2023                                 bss_conf->txpower);
2024                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2025         }
2026
2027         if (changes & BSS_CHANGED_CQM) {
2028                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2029                 /* reset cqm events tracking */
2030                 mvmvif->bf_data.last_cqm_event = 0;
2031                 if (mvmvif->bf_data.bf_enabled) {
2032                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2033                         if (ret)
2034                                 IWL_ERR(mvm,
2035                                         "failed to update CQM thresholds\n");
2036                 }
2037         }
2038
2039         if (changes & BSS_CHANGED_ARP_FILTER) {
2040                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2041                 iwl_mvm_configure_bcast_filter(mvm);
2042         }
2043 }
2044
2045 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2046                                  struct ieee80211_vif *vif)
2047 {
2048         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2049         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2050         int ret;
2051
2052         /*
2053          * iwl_mvm_mac_ctxt_add() might read directly from the device
2054          * (the system time), so make sure it is available.
2055          */
2056         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2057         if (ret)
2058                 return ret;
2059
2060         mutex_lock(&mvm->mutex);
2061
2062         /* Send the beacon template */
2063         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2064         if (ret)
2065                 goto out_unlock;
2066
2067         /*
2068          * Re-calculate the tsf id, as the master-slave relations depend on the
2069          * beacon interval, which was not known when the AP interface was added.
2070          */
2071         if (vif->type == NL80211_IFTYPE_AP)
2072                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2073
2074         mvmvif->ap_assoc_sta_count = 0;
2075
2076         /* Add the mac context */
2077         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2078         if (ret)
2079                 goto out_unlock;
2080
2081         /* Perform the binding */
2082         ret = iwl_mvm_binding_add_vif(mvm, vif);
2083         if (ret)
2084                 goto out_remove;
2085
2086         /* Send the bcast station. At this stage the TBTT and DTIM time events
2087          * are added and applied to the scheduler */
2088         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2089         if (ret)
2090                 goto out_unbind;
2091
2092         /* must be set before quota calculations */
2093         mvmvif->ap_ibss_active = true;
2094
2095         /* power updated needs to be done before quotas */
2096         iwl_mvm_power_update_mac(mvm);
2097
2098         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2099         if (ret)
2100                 goto out_quota_failed;
2101
2102         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2103         if (vif->p2p && mvm->p2p_device_vif)
2104                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2105
2106         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2107
2108         iwl_mvm_bt_coex_vif_change(mvm);
2109
2110         /* we don't support TDLS during DCM */
2111         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2112                 iwl_mvm_teardown_tdls_peers(mvm);
2113
2114         goto out_unlock;
2115
2116 out_quota_failed:
2117         iwl_mvm_power_update_mac(mvm);
2118         mvmvif->ap_ibss_active = false;
2119         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2120 out_unbind:
2121         iwl_mvm_binding_remove_vif(mvm, vif);
2122 out_remove:
2123         iwl_mvm_mac_ctxt_remove(mvm, vif);
2124 out_unlock:
2125         mutex_unlock(&mvm->mutex);
2126         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2127         return ret;
2128 }
2129
2130 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2131                                  struct ieee80211_vif *vif)
2132 {
2133         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2134         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2135
2136         iwl_mvm_prepare_mac_removal(mvm, vif);
2137
2138         mutex_lock(&mvm->mutex);
2139
2140         /* Handle AP stop while in CSA */
2141         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2142                 iwl_mvm_remove_time_event(mvm, mvmvif,
2143                                           &mvmvif->time_event_data);
2144                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2145                 mvmvif->csa_countdown = false;
2146         }
2147
2148         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2149                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2150                 mvm->csa_tx_block_bcn_timeout = 0;
2151         }
2152
2153         mvmvif->ap_ibss_active = false;
2154         mvm->ap_last_beacon_gp2 = 0;
2155
2156         iwl_mvm_bt_coex_vif_change(mvm);
2157
2158         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2159
2160         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2161         if (vif->p2p && mvm->p2p_device_vif)
2162                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2163
2164         iwl_mvm_update_quotas(mvm, false, NULL);
2165         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2166         iwl_mvm_binding_remove_vif(mvm, vif);
2167
2168         iwl_mvm_power_update_mac(mvm);
2169
2170         iwl_mvm_mac_ctxt_remove(mvm, vif);
2171
2172         mutex_unlock(&mvm->mutex);
2173 }
2174
2175 static void
2176 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2177                                  struct ieee80211_vif *vif,
2178                                  struct ieee80211_bss_conf *bss_conf,
2179                                  u32 changes)
2180 {
2181         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2182
2183         /* Changes will be applied when the AP/IBSS is started */
2184         if (!mvmvif->ap_ibss_active)
2185                 return;
2186
2187         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2188                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2189             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2190                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2191
2192         /* Need to send a new beacon template to the FW */
2193         if (changes & BSS_CHANGED_BEACON &&
2194             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2195                 IWL_WARN(mvm, "Failed updating beacon data\n");
2196
2197         if (changes & BSS_CHANGED_TXPOWER) {
2198                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2199                                 bss_conf->txpower);
2200                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2201         }
2202 }
2203
2204 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2205                                      struct ieee80211_vif *vif,
2206                                      struct ieee80211_bss_conf *bss_conf,
2207                                      u32 changes)
2208 {
2209         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2210
2211         /*
2212          * iwl_mvm_bss_info_changed_station() might call
2213          * iwl_mvm_protect_session(), which reads directly from
2214          * the device (the system time), so make sure it is available.
2215          */
2216         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2217                 return;
2218
2219         mutex_lock(&mvm->mutex);
2220
2221         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2222                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2223
2224         switch (vif->type) {
2225         case NL80211_IFTYPE_STATION:
2226                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2227                 break;
2228         case NL80211_IFTYPE_AP:
2229         case NL80211_IFTYPE_ADHOC:
2230                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2231                 break;
2232         default:
2233                 /* shouldn't happen */
2234                 WARN_ON_ONCE(1);
2235         }
2236
2237         mutex_unlock(&mvm->mutex);
2238         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2239 }
2240
2241 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2242                                struct ieee80211_vif *vif,
2243                                struct ieee80211_scan_request *hw_req)
2244 {
2245         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2246         int ret;
2247
2248         if (hw_req->req.n_channels == 0 ||
2249             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2250                 return -EINVAL;
2251
2252         mutex_lock(&mvm->mutex);
2253         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2254         mutex_unlock(&mvm->mutex);
2255
2256         return ret;
2257 }
2258
2259 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2260                                        struct ieee80211_vif *vif)
2261 {
2262         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2263
2264         mutex_lock(&mvm->mutex);
2265
2266         /* Due to a race condition, it's possible that mac80211 asks
2267          * us to stop a hw_scan when it's already stopped.  This can
2268          * happen, for instance, if we stopped the scan ourselves,
2269          * called ieee80211_scan_completed() and the userspace called
2270          * cancel scan scan before ieee80211_scan_work() could run.
2271          * To handle that, simply return if the scan is not running.
2272         */
2273         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2274                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2275
2276         mutex_unlock(&mvm->mutex);
2277 }
2278
2279 static void
2280 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2281                                   struct ieee80211_sta *sta, u16 tids,
2282                                   int num_frames,
2283                                   enum ieee80211_frame_release_type reason,
2284                                   bool more_data)
2285 {
2286         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2287
2288         /* Called when we need to transmit (a) frame(s) from mac80211 */
2289
2290         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2291                                           tids, more_data, false);
2292 }
2293
2294 static void
2295 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2296                                     struct ieee80211_sta *sta, u16 tids,
2297                                     int num_frames,
2298                                     enum ieee80211_frame_release_type reason,
2299                                     bool more_data)
2300 {
2301         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2302
2303         /* Called when we need to transmit (a) frame(s) from agg queue */
2304
2305         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2306                                           tids, more_data, true);
2307 }
2308
2309 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2310                                    struct ieee80211_vif *vif,
2311                                    enum sta_notify_cmd cmd,
2312                                    struct ieee80211_sta *sta)
2313 {
2314         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2315         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2316         unsigned long txqs = 0, tids = 0;
2317         int tid;
2318
2319         spin_lock_bh(&mvmsta->lock);
2320         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2321                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2322
2323                 if (tid_data->state != IWL_AGG_ON &&
2324                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2325                         continue;
2326
2327                 __set_bit(tid_data->txq_id, &txqs);
2328
2329                 if (iwl_mvm_tid_queued(tid_data) == 0)
2330                         continue;
2331
2332                 __set_bit(tid, &tids);
2333         }
2334
2335         switch (cmd) {
2336         case STA_NOTIFY_SLEEP:
2337                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2338                         ieee80211_sta_block_awake(hw, sta, true);
2339
2340                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2341                         ieee80211_sta_set_buffered(sta, tid, true);
2342
2343                 if (txqs)
2344                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2345                 /*
2346                  * The fw updates the STA to be asleep. Tx packets on the Tx
2347                  * queues to this station will not be transmitted. The fw will
2348                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2349                  */
2350                 break;
2351         case STA_NOTIFY_AWAKE:
2352                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2353                         break;
2354
2355                 if (txqs)
2356                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2357                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2358                 break;
2359         default:
2360                 break;
2361         }
2362         spin_unlock_bh(&mvmsta->lock);
2363 }
2364
2365 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2366                                        struct ieee80211_vif *vif,
2367                                        struct ieee80211_sta *sta)
2368 {
2369         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2370         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2371
2372         /*
2373          * This is called before mac80211 does RCU synchronisation,
2374          * so here we already invalidate our internal RCU-protected
2375          * station pointer. The rest of the code will thus no longer
2376          * be able to find the station this way, and we don't rely
2377          * on further RCU synchronisation after the sta_state()
2378          * callback deleted the station.
2379          */
2380         mutex_lock(&mvm->mutex);
2381         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2382                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2383                                    ERR_PTR(-ENOENT));
2384
2385         mutex_unlock(&mvm->mutex);
2386 }
2387
2388 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2389                                 const u8 *bssid)
2390 {
2391         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2392                 return;
2393
2394         if (vif->p2p && !iwl_mvm_is_p2p_scm_uapsd_supported(mvm)) {
2395                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2396                 return;
2397         }
2398
2399         if (!vif->p2p &&
2400             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2401                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2402                 return;
2403         }
2404
2405         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2406 }
2407
2408 static void
2409 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2410                            struct ieee80211_vif *vif, u8 *peer_addr,
2411                            enum nl80211_tdls_operation action)
2412 {
2413         struct iwl_fw_dbg_trigger_tlv *trig;
2414         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2415
2416         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2417                 return;
2418
2419         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2420         tdls_trig = (void *)trig->data;
2421         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2422                 return;
2423
2424         if (!(tdls_trig->action_bitmap & BIT(action)))
2425                 return;
2426
2427         if (tdls_trig->peer_mode &&
2428             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2429                 return;
2430
2431         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2432                                     "TDLS event occurred, peer %pM, action %d",
2433                                     peer_addr, action);
2434 }
2435
2436 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2437                                              struct iwl_mvm_sta *mvm_sta)
2438 {
2439         struct iwl_mvm_tid_data *tid_data;
2440         struct sk_buff *skb;
2441         int i;
2442
2443         spin_lock_bh(&mvm_sta->lock);
2444         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2445                 tid_data = &mvm_sta->tid_data[i];
2446                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2447                         ieee80211_free_txskb(mvm->hw, skb);
2448         }
2449         spin_unlock_bh(&mvm_sta->lock);
2450 }
2451
2452 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2453                                  struct ieee80211_vif *vif,
2454                                  struct ieee80211_sta *sta,
2455                                  enum ieee80211_sta_state old_state,
2456                                  enum ieee80211_sta_state new_state)
2457 {
2458         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2459         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2460         int ret;
2461
2462         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2463                            sta->addr, old_state, new_state);
2464
2465         /* this would be a mac80211 bug ... but don't crash */
2466         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2467                 return -EINVAL;
2468
2469         /* if a STA is being removed, reuse its ID */
2470         flush_work(&mvm->sta_drained_wk);
2471
2472         /*
2473          * If we are in a STA removal flow and in DQA mode:
2474          *
2475          * This is after the sync_rcu part, so the queues have already been
2476          * flushed. No more TXs on their way in mac80211's path, and no more in
2477          * the queues.
2478          * Also, we won't be getting any new TX frames for this station.
2479          * What we might have are deferred TX frames that need to be taken care
2480          * of.
2481          *
2482          * Drop any still-queued deferred-frame before removing the STA, and
2483          * make sure the worker is no longer handling frames for this STA.
2484          */
2485         if (old_state == IEEE80211_STA_NONE &&
2486             new_state == IEEE80211_STA_NOTEXIST &&
2487             iwl_mvm_is_dqa_supported(mvm)) {
2488                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2489
2490                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2491                 flush_work(&mvm->add_stream_wk);
2492
2493                 /*
2494                  * No need to make sure deferred TX indication is off since the
2495                  * worker will already remove it if it was on
2496                  */
2497         }
2498
2499         mutex_lock(&mvm->mutex);
2500         if (old_state == IEEE80211_STA_NOTEXIST &&
2501             new_state == IEEE80211_STA_NONE) {
2502                 /*
2503                  * Firmware bug - it'll crash if the beacon interval is less
2504                  * than 16. We can't avoid connecting at all, so refuse the
2505                  * station state change, this will cause mac80211 to abandon
2506                  * attempts to connect to this AP, and eventually wpa_s will
2507                  * blacklist the AP...
2508                  */
2509                 if (vif->type == NL80211_IFTYPE_STATION &&
2510                     vif->bss_conf.beacon_int < 16) {
2511                         IWL_ERR(mvm,
2512                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2513                                 sta->addr, vif->bss_conf.beacon_int);
2514                         ret = -EINVAL;
2515                         goto out_unlock;
2516                 }
2517
2518                 if (sta->tdls &&
2519                     (vif->p2p ||
2520                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2521                                                 IWL_MVM_TDLS_STA_COUNT ||
2522                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2523                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2524                         ret = -EBUSY;
2525                         goto out_unlock;
2526                 }
2527
2528                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2529                 if (sta->tdls && ret == 0) {
2530                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2531                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2532                                                    NL80211_TDLS_SETUP);
2533                 }
2534         } else if (old_state == IEEE80211_STA_NONE &&
2535                    new_state == IEEE80211_STA_AUTH) {
2536                 /*
2537                  * EBS may be disabled due to previous failures reported by FW.
2538                  * Reset EBS status here assuming environment has been changed.
2539                  */
2540                 mvm->last_ebs_successful = true;
2541                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2542                 ret = 0;
2543         } else if (old_state == IEEE80211_STA_AUTH &&
2544                    new_state == IEEE80211_STA_ASSOC) {
2545                 if (vif->type == NL80211_IFTYPE_AP) {
2546                         mvmvif->ap_assoc_sta_count++;
2547                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2548                 }
2549                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2550                 if (ret == 0)
2551                         iwl_mvm_rs_rate_init(mvm, sta,
2552                                              mvmvif->phy_ctxt->channel->band,
2553                                              true);
2554         } else if (old_state == IEEE80211_STA_ASSOC &&
2555                    new_state == IEEE80211_STA_AUTHORIZED) {
2556
2557                 /* we don't support TDLS during DCM */
2558                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2559                         iwl_mvm_teardown_tdls_peers(mvm);
2560
2561                 if (sta->tdls)
2562                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2563                                                    NL80211_TDLS_ENABLE_LINK);
2564
2565                 /* enable beacon filtering */
2566                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2567                 ret = 0;
2568         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2569                    new_state == IEEE80211_STA_ASSOC) {
2570                 /* disable beacon filtering */
2571                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2572                 ret = 0;
2573         } else if (old_state == IEEE80211_STA_ASSOC &&
2574                    new_state == IEEE80211_STA_AUTH) {
2575                 if (vif->type == NL80211_IFTYPE_AP) {
2576                         mvmvif->ap_assoc_sta_count--;
2577                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2578                 }
2579                 ret = 0;
2580         } else if (old_state == IEEE80211_STA_AUTH &&
2581                    new_state == IEEE80211_STA_NONE) {
2582                 ret = 0;
2583         } else if (old_state == IEEE80211_STA_NONE &&
2584                    new_state == IEEE80211_STA_NOTEXIST) {
2585                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2586                 if (sta->tdls) {
2587                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2588                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2589                                                    NL80211_TDLS_DISABLE_LINK);
2590                 }
2591         } else {
2592                 ret = -EIO;
2593         }
2594  out_unlock:
2595         mutex_unlock(&mvm->mutex);
2596
2597         if (sta->tdls && ret == 0) {
2598                 if (old_state == IEEE80211_STA_NOTEXIST &&
2599                     new_state == IEEE80211_STA_NONE)
2600                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2601                 else if (old_state == IEEE80211_STA_NONE &&
2602                          new_state == IEEE80211_STA_NOTEXIST)
2603                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2604         }
2605
2606         return ret;
2607 }
2608
2609 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2610 {
2611         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2612
2613         mvm->rts_threshold = value;
2614
2615         return 0;
2616 }
2617
2618 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2619                                   struct ieee80211_vif *vif,
2620                                   struct ieee80211_sta *sta, u32 changed)
2621 {
2622         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2623
2624         if (vif->type == NL80211_IFTYPE_STATION &&
2625             changed & IEEE80211_RC_NSS_CHANGED)
2626                 iwl_mvm_sf_update(mvm, vif, false);
2627 }
2628
2629 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2630                                struct ieee80211_vif *vif, u16 ac,
2631                                const struct ieee80211_tx_queue_params *params)
2632 {
2633         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2634         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2635
2636         mvmvif->queue_params[ac] = *params;
2637
2638         /*
2639          * No need to update right away, we'll get BSS_CHANGED_QOS
2640          * The exception is P2P_DEVICE interface which needs immediate update.
2641          */
2642         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2643                 int ret;
2644
2645                 mutex_lock(&mvm->mutex);
2646                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2647                 mutex_unlock(&mvm->mutex);
2648                 return ret;
2649         }
2650         return 0;
2651 }
2652
2653 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2654                                       struct ieee80211_vif *vif)
2655 {
2656         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2657         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2658         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2659
2660         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2661                 return;
2662
2663         /*
2664          * iwl_mvm_protect_session() reads directly from the device
2665          * (the system time), so make sure it is available.
2666          */
2667         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2668                 return;
2669
2670         mutex_lock(&mvm->mutex);
2671         /* Try really hard to protect the session and hear a beacon */
2672         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2673         mutex_unlock(&mvm->mutex);
2674
2675         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2676 }
2677
2678 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2679                                         struct ieee80211_vif *vif,
2680                                         struct cfg80211_sched_scan_request *req,
2681                                         struct ieee80211_scan_ies *ies)
2682 {
2683         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2684
2685         int ret;
2686
2687         mutex_lock(&mvm->mutex);
2688
2689         if (!vif->bss_conf.idle) {
2690                 ret = -EBUSY;
2691                 goto out;
2692         }
2693
2694         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2695
2696 out:
2697         mutex_unlock(&mvm->mutex);
2698         return ret;
2699 }
2700
2701 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2702                                        struct ieee80211_vif *vif)
2703 {
2704         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2705         int ret;
2706
2707         mutex_lock(&mvm->mutex);
2708
2709         /* Due to a race condition, it's possible that mac80211 asks
2710          * us to stop a sched_scan when it's already stopped.  This
2711          * can happen, for instance, if we stopped the scan ourselves,
2712          * called ieee80211_sched_scan_stopped() and the userspace called
2713          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2714          * could run.  To handle this, simply return if the scan is
2715          * not running.
2716         */
2717         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2718                 mutex_unlock(&mvm->mutex);
2719                 return 0;
2720         }
2721
2722         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2723         mutex_unlock(&mvm->mutex);
2724         iwl_mvm_wait_for_async_handlers(mvm);
2725
2726         return ret;
2727 }
2728
2729 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2730                                enum set_key_cmd cmd,
2731                                struct ieee80211_vif *vif,
2732                                struct ieee80211_sta *sta,
2733                                struct ieee80211_key_conf *key)
2734 {
2735         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2736         struct iwl_mvm_sta *mvmsta;
2737         struct iwl_mvm_key_pn *ptk_pn;
2738         int keyidx = key->keyidx;
2739         int ret;
2740         u8 key_offset;
2741
2742         if (iwlwifi_mod_params.sw_crypto) {
2743                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2744                 return -EOPNOTSUPP;
2745         }
2746
2747         switch (key->cipher) {
2748         case WLAN_CIPHER_SUITE_TKIP:
2749                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2750                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2751                 break;
2752         case WLAN_CIPHER_SUITE_CCMP:
2753         case WLAN_CIPHER_SUITE_GCMP:
2754         case WLAN_CIPHER_SUITE_GCMP_256:
2755                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2756                 break;
2757         case WLAN_CIPHER_SUITE_AES_CMAC:
2758         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2759         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2760                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2761                 break;
2762         case WLAN_CIPHER_SUITE_WEP40:
2763         case WLAN_CIPHER_SUITE_WEP104:
2764                 /* For non-client mode, only use WEP keys for TX as we probably
2765                  * don't have a station yet anyway and would then have to keep
2766                  * track of the keys, linking them to each of the clients/peers
2767                  * as they appear. For now, don't do that, for performance WEP
2768                  * offload doesn't really matter much, but we need it for some
2769                  * other offload features in client mode.
2770                  */
2771                 if (vif->type != NL80211_IFTYPE_STATION)
2772                         return 0;
2773                 break;
2774         default:
2775                 /* currently FW supports only one optional cipher scheme */
2776                 if (hw->n_cipher_schemes &&
2777                     hw->cipher_schemes->cipher == key->cipher)
2778                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2779                 else
2780                         return -EOPNOTSUPP;
2781         }
2782
2783         mutex_lock(&mvm->mutex);
2784
2785         switch (cmd) {
2786         case SET_KEY:
2787                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2788                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2789                         /*
2790                          * GTK on AP interface is a TX-only key, return 0;
2791                          * on IBSS they're per-station and because we're lazy
2792                          * we don't support them for RX, so do the same.
2793                          * CMAC/GMAC in AP/IBSS modes must be done in software.
2794                          */
2795                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
2796                             key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
2797                             key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2798                                 ret = -EOPNOTSUPP;
2799                         else
2800                                 ret = 0;
2801                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2802                         break;
2803                 }
2804
2805                 /* During FW restart, in order to restore the state as it was,
2806                  * don't try to reprogram keys we previously failed for.
2807                  */
2808                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2809                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2810                         IWL_DEBUG_MAC80211(mvm,
2811                                            "skip invalid idx key programming during restart\n");
2812                         ret = 0;
2813                         break;
2814                 }
2815
2816                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2817                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2818                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2819                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2820                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2821                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2822                         struct ieee80211_key_seq seq;
2823                         int tid, q;
2824
2825                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2826                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2827                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2828                                          mvm->trans->num_rx_queues *
2829                                                 sizeof(ptk_pn->q[0]),
2830                                          GFP_KERNEL);
2831                         if (!ptk_pn) {
2832                                 ret = -ENOMEM;
2833                                 break;
2834                         }
2835
2836                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2837                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2838                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2839                                         memcpy(ptk_pn->q[q].pn[tid],
2840                                                seq.ccmp.pn,
2841                                                IEEE80211_CCMP_PN_LEN);
2842                         }
2843
2844                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2845                 }
2846
2847                 /* in HW restart reuse the index, otherwise request a new one */
2848                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2849                         key_offset = key->hw_key_idx;
2850                 else
2851                         key_offset = STA_KEY_IDX_INVALID;
2852
2853                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2854                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2855                 if (ret) {
2856                         IWL_WARN(mvm, "set key failed\n");
2857                         /*
2858                          * can't add key for RX, but we don't need it
2859                          * in the device for TX so still return 0
2860                          */
2861                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2862                         ret = 0;
2863                 }
2864
2865                 break;
2866         case DISABLE_KEY:
2867                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2868                         ret = 0;
2869                         break;
2870                 }
2871
2872                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2873                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2874                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2875                      key->cipher == WLAN_CIPHER_SUITE_GCMP ||
2876                      key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) {
2877                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2878                         ptk_pn = rcu_dereference_protected(
2879                                                 mvmsta->ptk_pn[keyidx],
2880                                                 lockdep_is_held(&mvm->mutex));
2881                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2882                         if (ptk_pn)
2883                                 kfree_rcu(ptk_pn, rcu_head);
2884                 }
2885
2886                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2887                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2888                 break;
2889         default:
2890                 ret = -EINVAL;
2891         }
2892
2893         mutex_unlock(&mvm->mutex);
2894         return ret;
2895 }
2896
2897 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2898                                         struct ieee80211_vif *vif,
2899                                         struct ieee80211_key_conf *keyconf,
2900                                         struct ieee80211_sta *sta,
2901                                         u32 iv32, u16 *phase1key)
2902 {
2903         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2904
2905         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2906                 return;
2907
2908         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2909 }
2910
2911
2912 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2913                                struct iwl_rx_packet *pkt, void *data)
2914 {
2915         struct iwl_mvm *mvm =
2916                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2917         struct iwl_hs20_roc_res *resp;
2918         int resp_len = iwl_rx_packet_payload_len(pkt);
2919         struct iwl_mvm_time_event_data *te_data = data;
2920
2921         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2922                 return true;
2923
2924         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2925                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2926                 return true;
2927         }
2928
2929         resp = (void *)pkt->data;
2930
2931         IWL_DEBUG_TE(mvm,
2932                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2933                      resp->status, resp->event_unique_id);
2934
2935         te_data->uid = le32_to_cpu(resp->event_unique_id);
2936         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2937                      te_data->uid);
2938
2939         spin_lock_bh(&mvm->time_event_lock);
2940         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2941         spin_unlock_bh(&mvm->time_event_lock);
2942
2943         return true;
2944 }
2945
2946 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2947 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2948 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2949 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2950 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2951 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2952                                     struct ieee80211_channel *channel,
2953                                     struct ieee80211_vif *vif,
2954                                     int duration)
2955 {
2956         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2957         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2958         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2959         static const u16 time_event_response[] = { HOT_SPOT_CMD };
2960         struct iwl_notification_wait wait_time_event;
2961         u32 dtim_interval = vif->bss_conf.dtim_period *
2962                 vif->bss_conf.beacon_int;
2963         u32 req_dur, delay;
2964         struct iwl_hs20_roc_req aux_roc_req = {
2965                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2966                 .id_and_color =
2967                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2968                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2969                 /* Set the channel info data */
2970                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
2971                         PHY_BAND_24 : PHY_BAND_5,
2972                 .channel_info.channel = channel->hw_value,
2973                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2974                 /* Set the time and duration */
2975                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2976          };
2977
2978         delay = AUX_ROC_MIN_DELAY;
2979         req_dur = MSEC_TO_TU(duration);
2980
2981         /*
2982          * If we are associated we want the delay time to be at least one
2983          * dtim interval so that the FW can wait until after the DTIM and
2984          * then start the time event, this will potentially allow us to
2985          * remain off-channel for the max duration.
2986          * Since we want to use almost a whole dtim interval we would also
2987          * like the delay to be for 2-3 dtim intervals, in case there are
2988          * other time events with higher priority.
2989          */
2990         if (vif->bss_conf.assoc) {
2991                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
2992                 /* We cannot remain off-channel longer than the DTIM interval */
2993                 if (dtim_interval <= req_dur) {
2994                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
2995                         if (req_dur <= AUX_ROC_MIN_DURATION)
2996                                 req_dur = dtim_interval -
2997                                         AUX_ROC_MIN_SAFETY_BUFFER;
2998                 }
2999         }
3000
3001         aux_roc_req.duration = cpu_to_le32(req_dur);
3002         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
3003
3004         IWL_DEBUG_TE(mvm,
3005                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
3006                      channel->hw_value, req_dur, duration, delay,
3007                      dtim_interval);
3008         /* Set the node address */
3009         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3010
3011         lockdep_assert_held(&mvm->mutex);
3012
3013         spin_lock_bh(&mvm->time_event_lock);
3014
3015         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3016                 spin_unlock_bh(&mvm->time_event_lock);
3017                 return -EIO;
3018         }
3019
3020         te_data->vif = vif;
3021         te_data->duration = duration;
3022         te_data->id = HOT_SPOT_CMD;
3023
3024         spin_unlock_bh(&mvm->time_event_lock);
3025
3026         /*
3027          * Use a notification wait, which really just processes the
3028          * command response and doesn't wait for anything, in order
3029          * to be able to process the response and get the UID inside
3030          * the RX path. Using CMD_WANT_SKB doesn't work because it
3031          * stores the buffer and then wakes up this thread, by which
3032          * time another notification (that the time event started)
3033          * might already be processed unsuccessfully.
3034          */
3035         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3036                                    time_event_response,
3037                                    ARRAY_SIZE(time_event_response),
3038                                    iwl_mvm_rx_aux_roc, te_data);
3039
3040         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3041                                    &aux_roc_req);
3042
3043         if (res) {
3044                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3045                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3046                 goto out_clear_te;
3047         }
3048
3049         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3050         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3051         /* should never fail */
3052         WARN_ON_ONCE(res);
3053
3054         if (res) {
3055  out_clear_te:
3056                 spin_lock_bh(&mvm->time_event_lock);
3057                 iwl_mvm_te_clear_data(mvm, te_data);
3058                 spin_unlock_bh(&mvm->time_event_lock);
3059         }
3060
3061         return res;
3062 }
3063
3064 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3065                        struct ieee80211_vif *vif,
3066                        struct ieee80211_channel *channel,
3067                        int duration,
3068                        enum ieee80211_roc_type type)
3069 {
3070         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3071         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3072         struct cfg80211_chan_def chandef;
3073         struct iwl_mvm_phy_ctxt *phy_ctxt;
3074         int ret, i;
3075
3076         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3077                            duration, type);
3078
3079         flush_work(&mvm->roc_done_wk);
3080
3081         mutex_lock(&mvm->mutex);
3082
3083         switch (vif->type) {
3084         case NL80211_IFTYPE_STATION:
3085                 if (fw_has_capa(&mvm->fw->ucode_capa,
3086                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3087                         /* Use aux roc framework (HS20) */
3088                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3089                                                        vif, duration);
3090                         goto out_unlock;
3091                 }
3092                 IWL_ERR(mvm, "hotspot not supported\n");
3093                 ret = -EINVAL;
3094                 goto out_unlock;
3095         case NL80211_IFTYPE_P2P_DEVICE:
3096                 /* handle below */
3097                 break;
3098         default:
3099                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3100                 ret = -EINVAL;
3101                 goto out_unlock;
3102         }
3103
3104         for (i = 0; i < NUM_PHY_CTX; i++) {
3105                 phy_ctxt = &mvm->phy_ctxts[i];
3106                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3107                         continue;
3108
3109                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3110                         /*
3111                          * Unbind the P2P_DEVICE from the current PHY context,
3112                          * and if the PHY context is not used remove it.
3113                          */
3114                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3115                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3116                                 goto out_unlock;
3117
3118                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3119
3120                         /* Bind the P2P_DEVICE to the current PHY Context */
3121                         mvmvif->phy_ctxt = phy_ctxt;
3122
3123                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3124                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3125                                 goto out_unlock;
3126
3127                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3128                         goto schedule_time_event;
3129                 }
3130         }
3131
3132         /* Need to update the PHY context only if the ROC channel changed */
3133         if (channel == mvmvif->phy_ctxt->channel)
3134                 goto schedule_time_event;
3135
3136         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3137
3138         /*
3139          * Change the PHY context configuration as it is currently referenced
3140          * only by the P2P Device MAC
3141          */
3142         if (mvmvif->phy_ctxt->ref == 1) {
3143                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3144                                                &chandef, 1, 1);
3145                 if (ret)
3146                         goto out_unlock;
3147         } else {
3148                 /*
3149                  * The PHY context is shared with other MACs. Need to remove the
3150                  * P2P Device from the binding, allocate an new PHY context and
3151                  * create a new binding
3152                  */
3153                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3154                 if (!phy_ctxt) {
3155                         ret = -ENOSPC;
3156                         goto out_unlock;
3157                 }
3158
3159                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3160                                                1, 1);
3161                 if (ret) {
3162                         IWL_ERR(mvm, "Failed to change PHY context\n");
3163                         goto out_unlock;
3164                 }
3165
3166                 /* Unbind the P2P_DEVICE from the current PHY context */
3167                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3168                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3169                         goto out_unlock;
3170
3171                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3172
3173                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3174                 mvmvif->phy_ctxt = phy_ctxt;
3175
3176                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3177                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3178                         goto out_unlock;
3179
3180                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3181         }
3182
3183 schedule_time_event:
3184         /* Schedule the time events */
3185         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3186
3187 out_unlock:
3188         mutex_unlock(&mvm->mutex);
3189         IWL_DEBUG_MAC80211(mvm, "leave\n");
3190         return ret;
3191 }
3192
3193 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3194 {
3195         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3196
3197         IWL_DEBUG_MAC80211(mvm, "enter\n");
3198
3199         mutex_lock(&mvm->mutex);
3200         iwl_mvm_stop_roc(mvm);
3201         mutex_unlock(&mvm->mutex);
3202
3203         IWL_DEBUG_MAC80211(mvm, "leave\n");
3204         return 0;
3205 }
3206
3207 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3208                                  struct ieee80211_chanctx_conf *ctx)
3209 {
3210         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3211         struct iwl_mvm_phy_ctxt *phy_ctxt;
3212         int ret;
3213
3214         lockdep_assert_held(&mvm->mutex);
3215
3216         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3217
3218         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3219         if (!phy_ctxt) {
3220                 ret = -ENOSPC;
3221                 goto out;
3222         }
3223
3224         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3225                                        ctx->rx_chains_static,
3226                                        ctx->rx_chains_dynamic);
3227         if (ret) {
3228                 IWL_ERR(mvm, "Failed to add PHY context\n");
3229                 goto out;
3230         }
3231
3232         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3233         *phy_ctxt_id = phy_ctxt->id;
3234 out:
3235         return ret;
3236 }
3237
3238 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3239                                struct ieee80211_chanctx_conf *ctx)
3240 {
3241         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3242         int ret;
3243
3244         mutex_lock(&mvm->mutex);
3245         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3246         mutex_unlock(&mvm->mutex);
3247
3248         return ret;
3249 }
3250
3251 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3252                                      struct ieee80211_chanctx_conf *ctx)
3253 {
3254         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3255         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3256
3257         lockdep_assert_held(&mvm->mutex);
3258
3259         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3260 }
3261
3262 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3263                                    struct ieee80211_chanctx_conf *ctx)
3264 {
3265         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3266
3267         mutex_lock(&mvm->mutex);
3268         __iwl_mvm_remove_chanctx(mvm, ctx);
3269         mutex_unlock(&mvm->mutex);
3270 }
3271
3272 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3273                                    struct ieee80211_chanctx_conf *ctx,
3274                                    u32 changed)
3275 {
3276         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3277         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3278         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3279
3280         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3281                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3282                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3283                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3284                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3285                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3286                       phy_ctxt->ref, changed))
3287                 return;
3288
3289         mutex_lock(&mvm->mutex);
3290         iwl_mvm_bt_coex_vif_change(mvm);
3291         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3292                                  ctx->rx_chains_static,
3293                                  ctx->rx_chains_dynamic);
3294         mutex_unlock(&mvm->mutex);
3295 }
3296
3297 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3298                                         struct ieee80211_vif *vif,
3299                                         struct ieee80211_chanctx_conf *ctx,
3300                                         bool switching_chanctx)
3301 {
3302         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3303         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3304         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3305         int ret;
3306
3307         lockdep_assert_held(&mvm->mutex);
3308
3309         mvmvif->phy_ctxt = phy_ctxt;
3310
3311         switch (vif->type) {
3312         case NL80211_IFTYPE_AP:
3313                 /* only needed if we're switching chanctx (i.e. during CSA) */
3314                 if (switching_chanctx) {
3315                         mvmvif->ap_ibss_active = true;
3316                         break;
3317                 }
3318         case NL80211_IFTYPE_ADHOC:
3319                 /*
3320                  * The AP binding flow is handled as part of the start_ap flow
3321                  * (in bss_info_changed), similarly for IBSS.
3322                  */
3323                 ret = 0;
3324                 goto out;
3325         case NL80211_IFTYPE_STATION:
3326                 break;
3327         case NL80211_IFTYPE_MONITOR:
3328                 /* always disable PS when a monitor interface is active */
3329                 mvmvif->ps_disabled = true;
3330                 break;
3331         default:
3332                 ret = -EINVAL;
3333                 goto out;
3334         }
3335
3336         ret = iwl_mvm_binding_add_vif(mvm, vif);
3337         if (ret)
3338                 goto out;
3339
3340         /*
3341          * Power state must be updated before quotas,
3342          * otherwise fw will complain.
3343          */
3344         iwl_mvm_power_update_mac(mvm);
3345
3346         /* Setting the quota at this stage is only required for monitor
3347          * interfaces. For the other types, the bss_info changed flow
3348          * will handle quota settings.
3349          */
3350         if (vif->type == NL80211_IFTYPE_MONITOR) {
3351                 mvmvif->monitor_active = true;
3352                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3353                 if (ret)
3354                         goto out_remove_binding;
3355
3356                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3357                 if (ret)
3358                         goto out_remove_binding;
3359
3360         }
3361
3362         /* Handle binding during CSA */
3363         if (vif->type == NL80211_IFTYPE_AP) {
3364                 iwl_mvm_update_quotas(mvm, false, NULL);
3365                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3366         }
3367
3368         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3369                 u32 duration = 2 * vif->bss_conf.beacon_int;
3370
3371                 /* iwl_mvm_protect_session() reads directly from the
3372                  * device (the system time), so make sure it is
3373                  * available.
3374                  */
3375                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3376                 if (ret)
3377                         goto out_remove_binding;
3378
3379                 /* Protect the session to make sure we hear the first
3380                  * beacon on the new channel.
3381                  */
3382                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3383                                         vif->bss_conf.beacon_int / 2,
3384                                         true);
3385
3386                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3387
3388                 iwl_mvm_update_quotas(mvm, false, NULL);
3389         }
3390
3391         goto out;
3392
3393 out_remove_binding:
3394         iwl_mvm_binding_remove_vif(mvm, vif);
3395         iwl_mvm_power_update_mac(mvm);
3396 out:
3397         if (ret)
3398                 mvmvif->phy_ctxt = NULL;
3399         return ret;
3400 }
3401 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3402                                       struct ieee80211_vif *vif,
3403                                       struct ieee80211_chanctx_conf *ctx)
3404 {
3405         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3406         int ret;
3407
3408         mutex_lock(&mvm->mutex);
3409         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3410         mutex_unlock(&mvm->mutex);
3411
3412         return ret;
3413 }
3414
3415 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3416                                            struct ieee80211_vif *vif,
3417                                            struct ieee80211_chanctx_conf *ctx,
3418                                            bool switching_chanctx)
3419 {
3420         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3421         struct ieee80211_vif *disabled_vif = NULL;
3422
3423         lockdep_assert_held(&mvm->mutex);
3424
3425         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3426
3427         switch (vif->type) {
3428         case NL80211_IFTYPE_ADHOC:
3429                 goto out;
3430         case NL80211_IFTYPE_MONITOR:
3431                 mvmvif->monitor_active = false;
3432                 mvmvif->ps_disabled = false;
3433                 iwl_mvm_rm_snif_sta(mvm, vif);
3434                 break;
3435         case NL80211_IFTYPE_AP:
3436                 /* This part is triggered only during CSA */
3437                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3438                         goto out;
3439
3440                 mvmvif->csa_countdown = false;
3441
3442                 /* Set CS bit on all the stations */
3443                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3444
3445                 /* Save blocked iface, the timeout is set on the next beacon */
3446                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3447
3448                 mvmvif->ap_ibss_active = false;
3449                 break;
3450         case NL80211_IFTYPE_STATION:
3451                 if (!switching_chanctx)
3452                         break;
3453
3454                 disabled_vif = vif;
3455
3456                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3457                 break;
3458         default:
3459                 break;
3460         }
3461
3462         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3463         iwl_mvm_binding_remove_vif(mvm, vif);
3464
3465 out:
3466         mvmvif->phy_ctxt = NULL;
3467         iwl_mvm_power_update_mac(mvm);
3468 }
3469
3470 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3471                                          struct ieee80211_vif *vif,
3472                                          struct ieee80211_chanctx_conf *ctx)
3473 {
3474         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3475
3476         mutex_lock(&mvm->mutex);
3477         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3478         mutex_unlock(&mvm->mutex);
3479 }
3480
3481 static int
3482 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3483                                 struct ieee80211_vif_chanctx_switch *vifs)
3484 {
3485         int ret;
3486
3487         mutex_lock(&mvm->mutex);
3488         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3489         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3490
3491         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3492         if (ret) {
3493                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3494                 goto out_reassign;
3495         }
3496
3497         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3498                                            true);
3499         if (ret) {
3500                 IWL_ERR(mvm,
3501                         "failed to assign new_ctx during channel switch\n");
3502                 goto out_remove;
3503         }
3504
3505         /* we don't support TDLS during DCM - can be caused by channel switch */
3506         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3507                 iwl_mvm_teardown_tdls_peers(mvm);
3508
3509         goto out;
3510
3511 out_remove:
3512         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3513
3514 out_reassign:
3515         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3516                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3517                 goto out_restart;
3518         }
3519
3520         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3521                                          true)) {
3522                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3523                 goto out_restart;
3524         }
3525
3526         goto out;
3527
3528 out_restart:
3529         /* things keep failing, better restart the hw */
3530         iwl_mvm_nic_restart(mvm, false);
3531
3532 out:
3533         mutex_unlock(&mvm->mutex);
3534
3535         return ret;
3536 }
3537
3538 static int
3539 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3540                                     struct ieee80211_vif_chanctx_switch *vifs)
3541 {
3542         int ret;
3543
3544         mutex_lock(&mvm->mutex);
3545         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3546
3547         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3548                                            true);
3549         if (ret) {
3550                 IWL_ERR(mvm,
3551                         "failed to assign new_ctx during channel switch\n");
3552                 goto out_reassign;
3553         }
3554
3555         goto out;
3556
3557 out_reassign:
3558         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3559                                          true)) {
3560                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3561                 goto out_restart;
3562         }
3563
3564         goto out;
3565
3566 out_restart:
3567         /* things keep failing, better restart the hw */
3568         iwl_mvm_nic_restart(mvm, false);
3569
3570 out:
3571         mutex_unlock(&mvm->mutex);
3572
3573         return ret;
3574 }
3575
3576 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3577                                       struct ieee80211_vif_chanctx_switch *vifs,
3578                                       int n_vifs,
3579                                       enum ieee80211_chanctx_switch_mode mode)
3580 {
3581         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3582         int ret;
3583
3584         /* we only support a single-vif right now */
3585         if (n_vifs > 1)
3586                 return -EOPNOTSUPP;
3587
3588         switch (mode) {
3589         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3590                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3591                 break;
3592         case CHANCTX_SWMODE_REASSIGN_VIF:
3593                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3594                 break;
3595         default:
3596                 ret = -EOPNOTSUPP;
3597                 break;
3598         }
3599
3600         return ret;
3601 }
3602
3603 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3604                            struct ieee80211_sta *sta,
3605                            bool set)
3606 {
3607         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3608         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3609
3610         if (!mvm_sta || !mvm_sta->vif) {
3611                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3612                 return -EINVAL;
3613         }
3614
3615         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3616 }
3617
3618 #ifdef CONFIG_NL80211_TESTMODE
3619 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3620         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3621         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3622         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3623 };
3624
3625 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3626                                       struct ieee80211_vif *vif,
3627                                       void *data, int len)
3628 {
3629         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3630         int err;
3631         u32 noa_duration;
3632
3633         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3634         if (err)
3635                 return err;
3636
3637         if (!tb[IWL_MVM_TM_ATTR_CMD])
3638                 return -EINVAL;
3639
3640         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3641         case IWL_MVM_TM_CMD_SET_NOA:
3642                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3643                     !vif->bss_conf.enable_beacon ||
3644                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3645                         return -EINVAL;
3646
3647                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3648                 if (noa_duration >= vif->bss_conf.beacon_int)
3649                         return -EINVAL;
3650
3651                 mvm->noa_duration = noa_duration;
3652                 mvm->noa_vif = vif;
3653
3654                 return iwl_mvm_update_quotas(mvm, false, NULL);
3655         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3656                 /* must be associated client vif - ignore authorized */
3657                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3658                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3659                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3660                         return -EINVAL;
3661
3662                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3663                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3664                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3665         }
3666
3667         return -EOPNOTSUPP;
3668 }
3669
3670 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3671                                     struct ieee80211_vif *vif,
3672                                     void *data, int len)
3673 {
3674         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3675         int err;
3676
3677         mutex_lock(&mvm->mutex);
3678         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3679         mutex_unlock(&mvm->mutex);
3680
3681         return err;
3682 }
3683 #endif
3684
3685 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3686                                    struct ieee80211_vif *vif,
3687                                    struct ieee80211_channel_switch *chsw)
3688 {
3689         /* By implementing this operation, we prevent mac80211 from
3690          * starting its own channel switch timer, so that we can call
3691          * ieee80211_chswitch_done() ourselves at the right time
3692          * (which is when the absence time event starts).
3693          */
3694
3695         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3696                            "dummy channel switch op\n");
3697 }
3698
3699 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3700                                       struct ieee80211_vif *vif,
3701                                       struct ieee80211_channel_switch *chsw)
3702 {
3703         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3704         struct ieee80211_vif *csa_vif;
3705         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3706         u32 apply_time;
3707         int ret;
3708
3709         mutex_lock(&mvm->mutex);
3710
3711         mvmvif->csa_failed = false;
3712
3713         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3714                            chsw->chandef.center_freq1);
3715
3716         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3717
3718         switch (vif->type) {
3719         case NL80211_IFTYPE_AP:
3720                 csa_vif =
3721                         rcu_dereference_protected(mvm->csa_vif,
3722                                                   lockdep_is_held(&mvm->mutex));
3723                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3724                               "Another CSA is already in progress")) {
3725                         ret = -EBUSY;
3726                         goto out_unlock;
3727                 }
3728
3729                 /* we still didn't unblock tx. prevent new CS meanwhile */
3730                 if (rcu_dereference_protected(mvm->csa_tx_blocked_vif,
3731                                               lockdep_is_held(&mvm->mutex))) {
3732                         ret = -EBUSY;
3733                         goto out_unlock;
3734                 }
3735
3736                 rcu_assign_pointer(mvm->csa_vif, vif);
3737
3738                 if (WARN_ONCE(mvmvif->csa_countdown,
3739                               "Previous CSA countdown didn't complete")) {
3740                         ret = -EBUSY;
3741                         goto out_unlock;
3742                 }
3743
3744                 mvmvif->csa_target_freq = chsw->chandef.chan->center_freq;
3745
3746                 break;
3747         case NL80211_IFTYPE_STATION:
3748                 if (mvmvif->lqm_active)
3749                         iwl_mvm_send_lqm_cmd(vif,
3750                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3751                                              0, 0);
3752
3753                 /* Schedule the time event to a bit before beacon 1,
3754                  * to make sure we're in the new channel when the
3755                  * GO/AP arrives.
3756                  */
3757                 apply_time = chsw->device_timestamp +
3758                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3759                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3760
3761                 if (chsw->block_tx)
3762                         iwl_mvm_csa_client_absent(mvm, vif);
3763
3764                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3765                                             apply_time);
3766                 if (mvmvif->bf_data.bf_enabled) {
3767                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3768                         if (ret)
3769                                 goto out_unlock;
3770                 }
3771
3772                 break;
3773         default:
3774                 break;
3775         }
3776
3777         mvmvif->ps_disabled = true;
3778
3779         ret = iwl_mvm_power_update_ps(mvm);
3780         if (ret)
3781                 goto out_unlock;
3782
3783         /* we won't be on this channel any longer */
3784         iwl_mvm_teardown_tdls_peers(mvm);
3785
3786 out_unlock:
3787         mutex_unlock(&mvm->mutex);
3788
3789         return ret;
3790 }
3791
3792 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3793                                        struct ieee80211_vif *vif)
3794 {
3795         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3796         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3797         int ret;
3798
3799         mutex_lock(&mvm->mutex);
3800
3801         if (mvmvif->csa_failed) {
3802                 mvmvif->csa_failed = false;
3803                 ret = -EIO;
3804                 goto out_unlock;
3805         }
3806
3807         if (vif->type == NL80211_IFTYPE_STATION) {
3808                 struct iwl_mvm_sta *mvmsta;
3809
3810                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3811                                                           mvmvif->ap_sta_id);
3812
3813                 if (WARN_ON(!mvmsta)) {
3814                         ret = -EIO;
3815                         goto out_unlock;
3816                 }
3817
3818                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3819
3820                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3821
3822                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3823                 if (ret)
3824                         goto out_unlock;
3825
3826                 iwl_mvm_stop_session_protection(mvm, vif);
3827         }
3828
3829         mvmvif->ps_disabled = false;
3830
3831         ret = iwl_mvm_power_update_ps(mvm);
3832
3833 out_unlock:
3834         mutex_unlock(&mvm->mutex);
3835
3836         return ret;
3837 }
3838
3839 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3840                               struct ieee80211_vif *vif, u32 queues, bool drop)
3841 {
3842         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3843         struct iwl_mvm_vif *mvmvif;
3844         struct iwl_mvm_sta *mvmsta;
3845         struct ieee80211_sta *sta;
3846         int i;
3847         u32 msk = 0;
3848
3849         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3850                 return;
3851
3852         /* Make sure we're done with the deferred traffic before flushing */
3853         if (iwl_mvm_is_dqa_supported(mvm))
3854                 flush_work(&mvm->add_stream_wk);
3855
3856         mutex_lock(&mvm->mutex);
3857         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3858
3859         /* flush the AP-station and all TDLS peers */
3860         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3861                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3862                                                 lockdep_is_held(&mvm->mutex));
3863                 if (IS_ERR_OR_NULL(sta))
3864                         continue;
3865
3866                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3867                 if (mvmsta->vif != vif)
3868                         continue;
3869
3870                 /* make sure only TDLS peers or the AP are flushed */
3871                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3872
3873                 msk |= mvmsta->tfd_queue_msk;
3874         }
3875
3876         if (drop) {
3877                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3878                         IWL_ERR(mvm, "flush request fail\n");
3879                 mutex_unlock(&mvm->mutex);
3880         } else {
3881                 mutex_unlock(&mvm->mutex);
3882
3883                 /* this can take a while, and we may need/want other operations
3884                  * to succeed while doing this, so do it without the mutex held
3885                  */
3886                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3887         }
3888 }
3889
3890 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3891                                   struct survey_info *survey)
3892 {
3893         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3894         int ret;
3895
3896         memset(survey, 0, sizeof(*survey));
3897
3898         /* only support global statistics right now */
3899         if (idx != 0)
3900                 return -ENOENT;
3901
3902         if (!fw_has_capa(&mvm->fw->ucode_capa,
3903                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3904                 return -ENOENT;
3905
3906         mutex_lock(&mvm->mutex);
3907
3908         if (mvm->ucode_loaded) {
3909                 ret = iwl_mvm_request_statistics(mvm, false);
3910                 if (ret)
3911                         goto out;
3912         }
3913
3914         survey->filled = SURVEY_INFO_TIME |
3915                          SURVEY_INFO_TIME_RX |
3916                          SURVEY_INFO_TIME_TX |
3917                          SURVEY_INFO_TIME_SCAN;
3918         survey->time = mvm->accu_radio_stats.on_time_rf +
3919                        mvm->radio_stats.on_time_rf;
3920         do_div(survey->time, USEC_PER_MSEC);
3921
3922         survey->time_rx = mvm->accu_radio_stats.rx_time +
3923                           mvm->radio_stats.rx_time;
3924         do_div(survey->time_rx, USEC_PER_MSEC);
3925
3926         survey->time_tx = mvm->accu_radio_stats.tx_time +
3927                           mvm->radio_stats.tx_time;
3928         do_div(survey->time_tx, USEC_PER_MSEC);
3929
3930         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3931                             mvm->radio_stats.on_time_scan;
3932         do_div(survey->time_scan, USEC_PER_MSEC);
3933
3934         ret = 0;
3935  out:
3936         mutex_unlock(&mvm->mutex);
3937         return ret;
3938 }
3939
3940 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3941                                        struct ieee80211_vif *vif,
3942                                        struct ieee80211_sta *sta,
3943                                        struct station_info *sinfo)
3944 {
3945         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3946         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3947         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3948
3949         if (mvmsta->avg_energy) {
3950                 sinfo->signal_avg = mvmsta->avg_energy;
3951                 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
3952         }
3953
3954         if (!fw_has_capa(&mvm->fw->ucode_capa,
3955                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3956                 return;
3957
3958         /* if beacon filtering isn't on mac80211 does it anyway */
3959         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3960                 return;
3961
3962         if (!vif->bss_conf.assoc)
3963                 return;
3964
3965         mutex_lock(&mvm->mutex);
3966
3967         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3968                 goto unlock;
3969
3970         if (iwl_mvm_request_statistics(mvm, false))
3971                 goto unlock;
3972
3973         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3974                            mvmvif->beacon_stats.accu_num_beacons;
3975         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3976         if (mvmvif->beacon_stats.avg_signal) {
3977                 /* firmware only reports a value after RXing a few beacons */
3978                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3979                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3980         }
3981  unlock:
3982         mutex_unlock(&mvm->mutex);
3983 }
3984
3985 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
3986                                         struct ieee80211_vif *vif,
3987                                         const struct ieee80211_event *event)
3988 {
3989 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3990         do {                                                    \
3991                 if ((_cnt) && --(_cnt))                         \
3992                         break;                                  \
3993                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3994         } while (0)
3995
3996         struct iwl_fw_dbg_trigger_tlv *trig;
3997         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3998
3999         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4000                 return;
4001
4002         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4003         trig_mlme = (void *)trig->data;
4004         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4005                 return;
4006
4007         if (event->u.mlme.data == ASSOC_EVENT) {
4008                 if (event->u.mlme.status == MLME_DENIED)
4009                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4010                                            trig_mlme->stop_assoc_denied,
4011                                            "DENIED ASSOC: reason %d",
4012                                             event->u.mlme.reason);
4013                 else if (event->u.mlme.status == MLME_TIMEOUT)
4014                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4015                                            trig_mlme->stop_assoc_timeout,
4016                                            "ASSOC TIMEOUT");
4017         } else if (event->u.mlme.data == AUTH_EVENT) {
4018                 if (event->u.mlme.status == MLME_DENIED)
4019                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4020                                            trig_mlme->stop_auth_denied,
4021                                            "DENIED AUTH: reason %d",
4022                                            event->u.mlme.reason);
4023                 else if (event->u.mlme.status == MLME_TIMEOUT)
4024                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4025                                            trig_mlme->stop_auth_timeout,
4026                                            "AUTH TIMEOUT");
4027         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4028                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4029                                    trig_mlme->stop_rx_deauth,
4030                                    "DEAUTH RX %d", event->u.mlme.reason);
4031         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4032                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4033                                    trig_mlme->stop_tx_deauth,
4034                                    "DEAUTH TX %d", event->u.mlme.reason);
4035         }
4036 #undef CHECK_MLME_TRIGGER
4037 }
4038
4039 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4040                                           struct ieee80211_vif *vif,
4041                                           const struct ieee80211_event *event)
4042 {
4043         struct iwl_fw_dbg_trigger_tlv *trig;
4044         struct iwl_fw_dbg_trigger_ba *ba_trig;
4045
4046         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4047                 return;
4048
4049         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4050         ba_trig = (void *)trig->data;
4051         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4052                 return;
4053
4054         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4055                 return;
4056
4057         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4058                                     "BAR received from %pM, tid %d, ssn %d",
4059                                     event->u.ba.sta->addr, event->u.ba.tid,
4060                                     event->u.ba.ssn);
4061 }
4062
4063 static void
4064 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4065                                      struct ieee80211_vif *vif,
4066                                      const struct ieee80211_event *event)
4067 {
4068         struct iwl_fw_dbg_trigger_tlv *trig;
4069         struct iwl_fw_dbg_trigger_ba *ba_trig;
4070
4071         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4072                 return;
4073
4074         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4075         ba_trig = (void *)trig->data;
4076         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4077                 return;
4078
4079         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4080                 return;
4081
4082         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4083                                     "Frame from %pM timed out, tid %d",
4084                                     event->u.ba.sta->addr, event->u.ba.tid);
4085 }
4086
4087 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4088                                        struct ieee80211_vif *vif,
4089                                        const struct ieee80211_event *event)
4090 {
4091         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4092
4093         switch (event->type) {
4094         case MLME_EVENT:
4095                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4096                 break;
4097         case BAR_RX_EVENT:
4098                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4099                 break;
4100         case BA_FRAME_TIMEOUT:
4101                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4102                 break;
4103         default:
4104                 break;
4105         }
4106 }
4107
4108 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4109                                      struct iwl_mvm_internal_rxq_notif *notif,
4110                                      u32 size)
4111 {
4112         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(notif_waitq);
4113         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4114         int ret;
4115
4116         lockdep_assert_held(&mvm->mutex);
4117
4118         if (!iwl_mvm_has_new_rx_api(mvm))
4119                 return;
4120
4121         notif->cookie = mvm->queue_sync_cookie;
4122
4123         if (notif->sync)
4124                 atomic_set(&mvm->queue_sync_counter,
4125                            mvm->trans->num_rx_queues);
4126
4127         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4128         if (ret) {
4129                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4130                 goto out;
4131         }
4132
4133         if (notif->sync)
4134                 ret = wait_event_timeout(notif_waitq,
4135                                          atomic_read(&mvm->queue_sync_counter) == 0,
4136                                          HZ);
4137         WARN_ON_ONCE(!ret);
4138
4139 out:
4140         atomic_set(&mvm->queue_sync_counter, 0);
4141         mvm->queue_sync_cookie++;
4142 }
4143
4144 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4145 {
4146         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4147         struct iwl_mvm_internal_rxq_notif data = {
4148                 .type = IWL_MVM_RXQ_EMPTY,
4149                 .sync = 1,
4150         };
4151
4152         mutex_lock(&mvm->mutex);
4153         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4154         mutex_unlock(&mvm->mutex);
4155 }
4156
4157 const struct ieee80211_ops iwl_mvm_hw_ops = {
4158         .tx = iwl_mvm_mac_tx,
4159         .ampdu_action = iwl_mvm_mac_ampdu_action,
4160         .start = iwl_mvm_mac_start,
4161         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4162         .stop = iwl_mvm_mac_stop,
4163         .add_interface = iwl_mvm_mac_add_interface,
4164         .remove_interface = iwl_mvm_mac_remove_interface,
4165         .config = iwl_mvm_mac_config,
4166         .prepare_multicast = iwl_mvm_prepare_multicast,
4167         .configure_filter = iwl_mvm_configure_filter,
4168         .config_iface_filter = iwl_mvm_config_iface_filter,
4169         .bss_info_changed = iwl_mvm_bss_info_changed,
4170         .hw_scan = iwl_mvm_mac_hw_scan,
4171         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4172         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4173         .sta_state = iwl_mvm_mac_sta_state,
4174         .sta_notify = iwl_mvm_mac_sta_notify,
4175         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4176         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4177         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4178         .sta_rc_update = iwl_mvm_sta_rc_update,
4179         .conf_tx = iwl_mvm_mac_conf_tx,
4180         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4181         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4182         .flush = iwl_mvm_mac_flush,
4183         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4184         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4185         .set_key = iwl_mvm_mac_set_key,
4186         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4187         .remain_on_channel = iwl_mvm_roc,
4188         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4189         .add_chanctx = iwl_mvm_add_chanctx,
4190         .remove_chanctx = iwl_mvm_remove_chanctx,
4191         .change_chanctx = iwl_mvm_change_chanctx,
4192         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4193         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4194         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4195
4196         .start_ap = iwl_mvm_start_ap_ibss,
4197         .stop_ap = iwl_mvm_stop_ap_ibss,
4198         .join_ibss = iwl_mvm_start_ap_ibss,
4199         .leave_ibss = iwl_mvm_stop_ap_ibss,
4200
4201         .set_tim = iwl_mvm_set_tim,
4202
4203         .channel_switch = iwl_mvm_channel_switch,
4204         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4205         .post_channel_switch = iwl_mvm_post_channel_switch,
4206
4207         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4208         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4209         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4210
4211         .event_callback = iwl_mvm_mac_event_callback,
4212
4213         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4214
4215         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4216
4217 #ifdef CONFIG_PM_SLEEP
4218         /* look at d3.c */
4219         .suspend = iwl_mvm_suspend,
4220         .resume = iwl_mvm_resume,
4221         .set_wakeup = iwl_mvm_set_wakeup,
4222         .set_rekey_data = iwl_mvm_set_rekey_data,
4223 #if IS_ENABLED(CONFIG_IPV6)
4224         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4225 #endif
4226         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4227 #endif
4228         .get_survey = iwl_mvm_mac_get_survey,
4229         .sta_statistics = iwl_mvm_mac_sta_statistics,
4230 };