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) + 2);
 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         /*
 474          * Enable 11w if advertised by firmware and software crypto
 475          * is not enabled (as the firmware will interpret some mgmt
 476          * packets, so enabling it with software crypto isn't safe)
 477          */
 478         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 479             !iwlwifi_mod_params.sw_crypto) {
 480                 ieee80211_hw_set(hw, MFP_CAPABLE);
 481                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 482                         WLAN_CIPHER_SUITE_AES_CMAC;
 483                 hw->wiphy->n_cipher_suites++;
 484         }
 485
 486         /* currently FW API supports only one optional cipher scheme */
 487         if (mvm->fw->cs[0].cipher) {
 488                 mvm->hw->n_cipher_schemes = 1;
 489                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 490                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 491                         mvm->fw->cs[0].cipher;
 492                 hw->wiphy->n_cipher_suites++;
 493         }
 494
 495         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 496         hw->wiphy->features |=
 497                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 498                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 499                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 500
 501         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 502         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 503         hw->chanctx_data_size = sizeof(u16);
 504
 505         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 506                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 507                 BIT(NL80211_IFTYPE_AP) |
 508                 BIT(NL80211_IFTYPE_P2P_GO) |
 509                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 510                 BIT(NL80211_IFTYPE_ADHOC);
 511
 512         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 513         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 514         if (iwl_mvm_is_lar_supported(mvm))
 515                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 516         else
 517                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 518                                                REGULATORY_DISABLE_BEACON_HINTS;
 519
 520         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 521                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 522
 523         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 524
 525         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 526         hw->wiphy->n_iface_combinations =
 527                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 528
 529         hw->wiphy->max_remain_on_channel_duration = 10000;
 530         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 531         /* we can compensate an offset of up to 3 channels = 15 MHz */
 532         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 533
 534         /* Extract MAC address */
 535         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 536         hw->wiphy->addresses = mvm->addresses;
 537         hw->wiphy->n_addresses = 1;
 538
 539         /* Extract additional MAC addresses if available */
 540         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 541                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 542
 543         for (i = 1; i < num_mac; i++) {
 544                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 545                        ETH_ALEN);
 546                 mvm->addresses[i].addr[5]++;
 547                 hw->wiphy->n_addresses++;
 548         }
 549
 550         iwl_mvm_reset_phy_ctxts(mvm);
 551
 552         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 553
 554         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 555
 556         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 557         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 558                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 559
 560         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 561                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 562         else
 563                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 564
 565         if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 566                 hw->wiphy->bands[NL80211_BAND_2GHZ] =
 567                         &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 568         if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) {
 569                 hw->wiphy->bands[NL80211_BAND_5GHZ] =
 570                         &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 571
 572                 if (fw_has_capa(&mvm->fw->ucode_capa,
 573                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 574                     fw_has_api(&mvm->fw->ucode_capa,
 575                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 576                         hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |=
 577                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 578         }
 579
 580         hw->wiphy->hw_version = mvm->trans->hw_id;
 581
 582         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 583                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 584         else
 585                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 586
 587         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 588         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 589         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 590         /* we create the 802.11 header and zero length SSID IE. */
 591         hw->wiphy->max_sched_scan_ie_len =
 592                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 593         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 594         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 595
 596         /*
 597          * the firmware uses u8 for num of iterations, but 0xff is saved for
 598          * infinite loop, so the maximum number of iterations is actually 254.
 599          */
 600         hw->wiphy->max_sched_scan_plan_iterations = 254;
 601
 602         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 603                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 604                                NL80211_FEATURE_P2P_GO_OPPPS |
 605                                NL80211_FEATURE_DYNAMIC_SMPS |
 606                                NL80211_FEATURE_STATIC_SMPS |
 607                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 608
 609         if (fw_has_capa(&mvm->fw->ucode_capa,
 610                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 611                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 612         if (fw_has_capa(&mvm->fw->ucode_capa,
 613                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 614                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 615
 616         if (fw_has_capa(&mvm->fw->ucode_capa,
 617                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 618                 hw->wiphy->features |=
 619                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 620
 621         if (fw_has_capa(&mvm->fw->ucode_capa,
 622                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 623                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 624
 625         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 626
 627 #ifdef CONFIG_PM_SLEEP
 628         if (iwl_mvm_is_d0i3_supported(mvm) &&
 629             device_can_wakeup(mvm->trans->dev)) {
 630                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 631                 hw->wiphy->wowlan = &mvm->wowlan;
 632         }
 633
 634         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 635             mvm->trans->ops->d3_suspend &&
 636             mvm->trans->ops->d3_resume &&
 637             device_can_wakeup(mvm->trans->dev)) {
 638                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 639                                      WIPHY_WOWLAN_DISCONNECT |
 640                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 641                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 642                                      WIPHY_WOWLAN_NET_DETECT;
 643                 if (!iwlwifi_mod_params.sw_crypto)
 644                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 645                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 646                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 647
 648                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 649                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 650                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 651                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 652                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 653                 hw->wiphy->wowlan = &mvm->wowlan;
 654         }
 655 #endif
 656
 657 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 658         /* assign default bcast filtering configuration */
 659         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 660 #endif
 661
 662         ret = iwl_mvm_leds_init(mvm);
 663         if (ret)
 664                 return ret;
 665
 666         if (fw_has_capa(&mvm->fw->ucode_capa,
 667                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 668                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 669                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 670                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 671         }
 672
 673         if (fw_has_capa(&mvm->fw->ucode_capa,
 674                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 675                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 676                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 677         }
 678
 679         hw->netdev_features |= mvm->cfg->features;
 680         if (!iwl_mvm_is_csum_supported(mvm)) {
 681                 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS |
 682                                          NETIF_F_RXCSUM);
 683                 /* We may support SW TX CSUM */
 684                 if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
 685                         hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS;
 686         }
 687
 688         ret = ieee80211_register_hw(mvm->hw);
 689         if (ret)
 690                 iwl_mvm_leds_exit(mvm);
 691
 692         return ret;
 693 }
 694
 695 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 696                              struct ieee80211_sta *sta,
 697                              struct sk_buff *skb)
 698 {
 699         struct iwl_mvm_sta *mvmsta;
 700         bool defer = false;
 701
 702         /*
 703          * double check the IN_D0I3 flag both before and after
 704          * taking the spinlock, in order to prevent taking
 705          * the spinlock when not needed.
 706          */
 707         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 708                 return false;
 709
 710         spin_lock(&mvm->d0i3_tx_lock);
 711         /*
 712          * testing the flag again ensures the skb dequeue
 713          * loop (on d0i3 exit) hasn't run yet.
 714          */
 715         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 716                 goto out;
 717
 718         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 719         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 720             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 721                 goto out;
 722
 723         __skb_queue_tail(&mvm->d0i3_tx, skb);
 724         ieee80211_stop_queues(mvm->hw);
 725
 726         /* trigger wakeup */
 727         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 728         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 729
 730         defer = true;
 731 out:
 732         spin_unlock(&mvm->d0i3_tx_lock);
 733         return defer;
 734 }
 735
 736 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 737                            struct ieee80211_tx_control *control,
 738                            struct sk_buff *skb)
 739 {
 740         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 741         struct ieee80211_sta *sta = control->sta;
 742         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 743         struct ieee80211_hdr *hdr = (void *)skb->data;
 744
 745         if (iwl_mvm_is_radio_killed(mvm)) {
 746                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 747                 goto drop;
 748         }
 749
 750         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 751             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 752             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 753                 goto drop;
 754
 755         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 756         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 757                      ieee80211_is_mgmt(hdr->frame_control) &&
 758                      !ieee80211_is_deauth(hdr->frame_control) &&
 759                      !ieee80211_is_disassoc(hdr->frame_control) &&
 760                      !ieee80211_is_action(hdr->frame_control)))
 761                 sta = NULL;
 762
 763         if (sta) {
 764                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 765                         return;
 766                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 767                         goto drop;
 768                 return;
 769         }
 770
 771         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 772                 goto drop;
 773         return;
 774  drop:
 775         ieee80211_free_txskb(hw, skb);
 776 }
 777
 778 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 779 {
 780         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 781                 return false;
 782         return true;
 783 }
 784
 785 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 786 {
 787         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 788                 return false;
 789         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 790                 return true;
 791
 792         /* enabled by default */
 793         return true;
 794 }
 795
 796 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 797         do {                                                    \
 798                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 799                         break;                                  \
 800                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 801         } while (0)
 802
 803 static void
 804 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 805                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 806                             enum ieee80211_ampdu_mlme_action action)
 807 {
 808         struct iwl_fw_dbg_trigger_tlv *trig;
 809         struct iwl_fw_dbg_trigger_ba *ba_trig;
 810
 811         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 812                 return;
 813
 814         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 815         ba_trig = (void *)trig->data;
 816
 817         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 818                 return;
 819
 820         switch (action) {
 821         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 822                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 823                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 824
 825                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 826                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 827                                  sta->addr, tid, tid_data->ssn);
 828                 break;
 829                 }
 830         case IEEE80211_AMPDU_TX_STOP_CONT:
 831                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 832                                  "TX AGG STOP: MAC %pM tid %d\n",
 833                                  sta->addr, tid);
 834                 break;
 835         case IEEE80211_AMPDU_RX_START:
 836                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 837                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 838                                  sta->addr, tid, rx_ba_ssn);
 839                 break;
 840         case IEEE80211_AMPDU_RX_STOP:
 841                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 842                                  "RX AGG STOP: MAC %pM tid %d\n",
 843                                  sta->addr, tid);
 844                 break;
 845         default:
 846                 break;
 847         }
 848 }
 849
 850 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 851                                     struct ieee80211_vif *vif,
 852                                     struct ieee80211_ampdu_params *params)
 853 {
 854         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 855         int ret;
 856         bool tx_agg_ref = false;
 857         struct ieee80211_sta *sta = params->sta;
 858         enum ieee80211_ampdu_mlme_action action = params->action;
 859         u16 tid = params->tid;
 860         u16 *ssn = &params->ssn;
 861         u8 buf_size = params->buf_size;
 862         bool amsdu = params->amsdu;
 863         u16 timeout = params->timeout;
 864
 865         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 866                      sta->addr, tid, action);
 867
 868         if (!(mvm->nvm_data->sku_cap_11n_enable))
 869                 return -EACCES;
 870
 871         /* return from D0i3 before starting a new Tx aggregation */
 872         switch (action) {
 873         case IEEE80211_AMPDU_TX_START:
 874         case IEEE80211_AMPDU_TX_STOP_CONT:
 875         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 876         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 877         case IEEE80211_AMPDU_TX_OPERATIONAL:
 878                 /*
 879                  * for tx start, wait synchronously until D0i3 exit to
 880                  * get the correct sequence number for the tid.
 881                  * additionally, some other ampdu actions use direct
 882                  * target access, which is not handled automatically
 883                  * by the trans layer (unlike commands), so wait for
 884                  * d0i3 exit in these cases as well.
 885                  */
 886                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 887                 if (ret)
 888                         return ret;
 889
 890                 tx_agg_ref = true;
 891                 break;
 892         default:
 893                 break;
 894         }
 895
 896         mutex_lock(&mvm->mutex);
 897
 898         switch (action) {
 899         case IEEE80211_AMPDU_RX_START:
 900                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 901                         ret = -EINVAL;
 902                         break;
 903                 }
 904                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size,
 905                                          timeout);
 906                 break;
 907         case IEEE80211_AMPDU_RX_STOP:
 908                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size,
 909                                          timeout);
 910                 break;
 911         case IEEE80211_AMPDU_TX_START:
 912                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 913                         ret = -EINVAL;
 914                         break;
 915                 }
 916                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 917                 break;
 918         case IEEE80211_AMPDU_TX_STOP_CONT:
 919                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 920                 break;
 921         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 922         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 923                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 924                 break;
 925         case IEEE80211_AMPDU_TX_OPERATIONAL:
 926                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
 927                                               buf_size, amsdu);
 928                 break;
 929         default:
 930                 WARN_ON_ONCE(1);
 931                 ret = -EINVAL;
 932                 break;
 933         }
 934
 935         if (!ret) {
 936                 u16 rx_ba_ssn = 0;
 937
 938                 if (action == IEEE80211_AMPDU_RX_START)
 939                         rx_ba_ssn = *ssn;
 940
 941                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 942                                             rx_ba_ssn, action);
 943         }
 944         mutex_unlock(&mvm->mutex);
 945
 946         /*
 947          * If the tid is marked as started, we won't use it for offloaded
 948          * traffic on the next D0i3 entry. It's safe to unref.
 949          */
 950         if (tx_agg_ref)
 951                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 952
 953         return ret;
 954 }
 955
 956 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 957                                      struct ieee80211_vif *vif)
 958 {
 959         struct iwl_mvm *mvm = data;
 960         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 961
 962         mvmvif->uploaded = false;
 963         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 964
 965         spin_lock_bh(&mvm->time_event_lock);
 966         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 967         spin_unlock_bh(&mvm->time_event_lock);
 968
 969         mvmvif->phy_ctxt = NULL;
 970         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 971 }
 972
 973 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 974 {
 975         /* clear the D3 reconfig, we only need it to avoid dumping a
 976          * firmware coredump on reconfiguration, we shouldn't do that
 977          * on D3->D0 transition
 978          */
 979         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
 980                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
 981                 iwl_mvm_fw_error_dump(mvm);
 982         }
 983
 984         /* cleanup all stale references (scan, roc), but keep the
 985          * ucode_down ref until reconfig is complete
 986          */
 987         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 988
 989         iwl_mvm_stop_device(mvm);
 990
 991         mvm->scan_status = 0;
 992         mvm->ps_disabled = false;
 993         mvm->calibrating = false;
 994
 995         /* just in case one was running */
 996         iwl_mvm_cleanup_roc_te(mvm);
 997         ieee80211_remain_on_channel_expired(mvm->hw);
 998
 999         /*
1000          * cleanup all interfaces, even inactive ones, as some might have
1001          * gone down during the HW restart
1002          */
1003         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1004
1005         mvm->p2p_device_vif = NULL;
1006         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1007
1008         iwl_mvm_reset_phy_ctxts(mvm);
1009         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1010         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1011         memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames));
1012         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1013         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1014         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1015         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1016         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1017         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1018         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1019
1020         ieee80211_wake_queues(mvm->hw);
1021
1022         /* clear any stale d0i3 state */
1023         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1024
1025         mvm->vif_count = 0;
1026         mvm->rx_ba_sessions = 0;
1027         mvm->fw_dbg_conf = FW_DBG_INVALID;
1028
1029         /* keep statistics ticking */
1030         iwl_mvm_accu_radio_stats(mvm);
1031 }
1032
1033 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1034 {
1035         int ret;
1036
1037         lockdep_assert_held(&mvm->mutex);
1038
1039         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1040                 /* Clean up some internal and mac80211 state on restart */
1041                 iwl_mvm_restart_cleanup(mvm);
1042         } else {
1043                 /* Hold the reference to prevent runtime suspend while
1044                  * the start procedure runs.  It's a bit confusing
1045                  * that the UCODE_DOWN reference is taken, but it just
1046                  * means "UCODE is not UP yet". ( TODO: rename this
1047                  * reference).
1048                  */
1049                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1050         }
1051         ret = iwl_mvm_up(mvm);
1052
1053         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1054                 /* Something went wrong - we need to finish some cleanup
1055                  * that normally iwl_mvm_mac_restart_complete() below
1056                  * would do.
1057                  */
1058                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1059                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1060         }
1061
1062         return ret;
1063 }
1064
1065 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1066 {
1067         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1068         int ret;
1069
1070         /* Some hw restart cleanups must not hold the mutex */
1071         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1072                 /*
1073                  * Make sure we are out of d0i3. This is needed
1074                  * to make sure the reference accounting is correct
1075                  * (and there is no stale d0i3_exit_work).
1076                  */
1077                 wait_event_timeout(mvm->d0i3_exit_waitq,
1078                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1079                                              &mvm->status),
1080                                    HZ);
1081         }
1082
1083         mutex_lock(&mvm->mutex);
1084         ret = __iwl_mvm_mac_start(mvm);
1085         mutex_unlock(&mvm->mutex);
1086
1087         return ret;
1088 }
1089
1090 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1091 {
1092         int ret;
1093
1094         mutex_lock(&mvm->mutex);
1095
1096         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1097         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1098         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1099         if (ret)
1100                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1101                         ret);
1102
1103         /* allow transport/FW low power modes */
1104         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1105
1106         /*
1107          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1108          * of packets the FW sent out, so we must reconnect.
1109          */
1110         iwl_mvm_teardown_tdls_peers(mvm);
1111
1112         mutex_unlock(&mvm->mutex);
1113 }
1114
1115 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1116 {
1117         if (iwl_mvm_is_d0i3_supported(mvm) &&
1118             iwl_mvm_enter_d0i3_on_suspend(mvm))
1119                 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1120                                               !test_bit(IWL_MVM_STATUS_IN_D0I3,
1121                                                         &mvm->status),
1122                                               HZ),
1123                           "D0i3 exit on resume timed out\n");
1124 }
1125
1126 static void
1127 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1128                               enum ieee80211_reconfig_type reconfig_type)
1129 {
1130         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1131
1132         switch (reconfig_type) {
1133         case IEEE80211_RECONFIG_TYPE_RESTART:
1134                 iwl_mvm_restart_complete(mvm);
1135                 break;
1136         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1137                 iwl_mvm_resume_complete(mvm);
1138                 break;
1139         }
1140 }
1141
1142 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1143 {
1144         lockdep_assert_held(&mvm->mutex);
1145
1146         /* firmware counters are obviously reset now, but we shouldn't
1147          * partially track so also clear the fw_reset_accu counters.
1148          */
1149         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1150
1151         /* async_handlers_wk is now blocked */
1152
1153         /*
1154          * The work item could be running or queued if the
1155          * ROC time event stops just as we get here.
1156          */
1157         flush_work(&mvm->roc_done_wk);
1158
1159         iwl_mvm_stop_device(mvm);
1160
1161         iwl_mvm_async_handlers_purge(mvm);
1162         /* async_handlers_list is empty and will stay empty: HW is stopped */
1163
1164         /* the fw is stopped, the aux sta is dead: clean up driver state */
1165         iwl_mvm_del_aux_sta(mvm);
1166
1167         iwl_free_fw_paging(mvm);
1168
1169         /*
1170          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1171          * won't be called in this case).
1172          * But make sure to cleanup interfaces that have gone down before/during
1173          * HW restart was requested.
1174          */
1175         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1176                 ieee80211_iterate_interfaces(mvm->hw, 0,
1177                                              iwl_mvm_cleanup_iterator, mvm);
1178
1179         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1180          * make sure there's nothing left there and warn if any is found.
1181          */
1182         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1183                 int i;
1184
1185                 for (i = 0; i < mvm->max_scans; i++) {
1186                         if (WARN_ONCE(mvm->scan_uid_status[i],
1187                                       "UMAC scan UID %d status was not cleaned\n",
1188                                       i))
1189                                 mvm->scan_uid_status[i] = 0;
1190                 }
1191         }
1192 }
1193
1194 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1195 {
1196         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1197
1198         flush_work(&mvm->d0i3_exit_work);
1199         flush_work(&mvm->async_handlers_wk);
1200         flush_work(&mvm->add_stream_wk);
1201         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1202         iwl_mvm_free_fw_dump_desc(mvm);
1203
1204         mutex_lock(&mvm->mutex);
1205         __iwl_mvm_mac_stop(mvm);
1206         mutex_unlock(&mvm->mutex);
1207
1208         /*
1209          * The worker might have been waiting for the mutex, let it run and
1210          * discover that its list is now empty.
1211          */
1212         cancel_work_sync(&mvm->async_handlers_wk);
1213 }
1214
1215 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1216 {
1217         u16 i;
1218
1219         lockdep_assert_held(&mvm->mutex);
1220
1221         for (i = 0; i < NUM_PHY_CTX; i++)
1222                 if (!mvm->phy_ctxts[i].ref)
1223                         return &mvm->phy_ctxts[i];
1224
1225         IWL_ERR(mvm, "No available PHY context\n");
1226         return NULL;
1227 }
1228
1229 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1230                                 s16 tx_power)
1231 {
1232         struct iwl_dev_tx_power_cmd cmd = {
1233                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1234                 .v2.mac_context_id =
1235                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1236                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1237         };
1238         int len = sizeof(cmd);
1239
1240         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1241                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1242
1243         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1244                 len = sizeof(cmd.v2);
1245
1246         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1247 }
1248
1249 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1250                                      struct ieee80211_vif *vif)
1251 {
1252         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1253         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1254         int ret;
1255
1256         mvmvif->mvm = mvm;
1257
1258         /*
1259          * make sure D0i3 exit is completed, otherwise a target access
1260          * during tx queue configuration could be done when still in
1261          * D0i3 state.
1262          */
1263         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1264         if (ret)
1265                 return ret;
1266
1267         /*
1268          * Not much to do here. The stack will not allow interface
1269          * types or combinations that we didn't advertise, so we
1270          * don't really have to check the types.
1271          */
1272
1273         mutex_lock(&mvm->mutex);
1274
1275         /* make sure that beacon statistics don't go backwards with FW reset */
1276         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1277                 mvmvif->beacon_stats.accu_num_beacons +=
1278                         mvmvif->beacon_stats.num_beacons;
1279
1280         /* Allocate resources for the MAC context, and add it to the fw  */
1281         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1282         if (ret)
1283                 goto out_unlock;
1284
1285         /* Counting number of interfaces is needed for legacy PM */
1286         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1287                 mvm->vif_count++;
1288
1289         /*
1290          * The AP binding flow can be done only after the beacon
1291          * template is configured (which happens only in the mac80211
1292          * start_ap() flow), and adding the broadcast station can happen
1293          * only after the binding.
1294          * In addition, since modifying the MAC before adding a bcast
1295          * station is not allowed by the FW, delay the adding of MAC context to
1296          * the point where we can also add the bcast station.
1297          * In short: there's not much we can do at this point, other than
1298          * allocating resources :)
1299          */
1300         if (vif->type == NL80211_IFTYPE_AP ||
1301             vif->type == NL80211_IFTYPE_ADHOC) {
1302                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1303                 if (ret) {
1304                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1305                         goto out_release;
1306                 }
1307
1308                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1309                 goto out_unlock;
1310         }
1311
1312         mvmvif->features |= hw->netdev_features;
1313
1314         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1315         if (ret)
1316                 goto out_release;
1317
1318         ret = iwl_mvm_power_update_mac(mvm);
1319         if (ret)
1320                 goto out_remove_mac;
1321
1322         /* beacon filtering */
1323         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1324         if (ret)
1325                 goto out_remove_mac;
1326
1327         if (!mvm->bf_allowed_vif &&
1328             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1329                 mvm->bf_allowed_vif = mvmvif;
1330                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1331                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1332         }
1333
1334         /*
1335          * P2P_DEVICE interface does not have a channel context assigned to it,
1336          * so a dedicated PHY context is allocated to it and the corresponding
1337          * MAC context is bound to it at this stage.
1338          */
1339         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1340
1341                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1342                 if (!mvmvif->phy_ctxt) {
1343                         ret = -ENOSPC;
1344                         goto out_free_bf;
1345                 }
1346
1347                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1348                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1349                 if (ret)
1350                         goto out_unref_phy;
1351
1352                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1353                 if (ret)
1354                         goto out_unbind;
1355
1356                 /* Save a pointer to p2p device vif, so it can later be used to
1357                  * update the p2p device MAC when a GO is started/stopped */
1358                 mvm->p2p_device_vif = vif;
1359         }
1360
1361         iwl_mvm_vif_dbgfs_register(mvm, vif);
1362         goto out_unlock;
1363
1364  out_unbind:
1365         iwl_mvm_binding_remove_vif(mvm, vif);
1366  out_unref_phy:
1367         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1368  out_free_bf:
1369         if (mvm->bf_allowed_vif == mvmvif) {
1370                 mvm->bf_allowed_vif = NULL;
1371                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1372                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1373         }
1374  out_remove_mac:
1375         mvmvif->phy_ctxt = NULL;
1376         iwl_mvm_mac_ctxt_remove(mvm, vif);
1377  out_release:
1378         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1379                 mvm->vif_count--;
1380
1381         iwl_mvm_mac_ctxt_release(mvm, vif);
1382  out_unlock:
1383         mutex_unlock(&mvm->mutex);
1384
1385         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1386
1387         return ret;
1388 }
1389
1390 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1391                                         struct ieee80211_vif *vif)
1392 {
1393         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1394
1395         if (tfd_msk) {
1396                 /*
1397                  * mac80211 first removes all the stations of the vif and
1398                  * then removes the vif. When it removes a station it also
1399                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1400                  * of all the stations of this vif are closed, and the queues
1401                  * of these AMPDU sessions are properly closed.
1402                  * We still need to take care of the shared queues of the vif.
1403                  * Flush them here.
1404                  */
1405                 mutex_lock(&mvm->mutex);
1406                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1407                 mutex_unlock(&mvm->mutex);
1408
1409                 /*
1410                  * There are transports that buffer a few frames in the host.
1411                  * For these, the flush above isn't enough since while we were
1412                  * flushing, the transport might have sent more frames to the
1413                  * device. To solve this, wait here until the transport is
1414                  * empty. Technically, this could have replaced the flush
1415                  * above, but flush is much faster than draining. So flush
1416                  * first, and drain to make sure we have no frames in the
1417                  * transport anymore.
1418                  * If a station still had frames on the shared queues, it is
1419                  * already marked as draining, so to complete the draining, we
1420                  * just need to wait until the transport is empty.
1421                  */
1422                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1423         }
1424
1425         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1426                 /*
1427                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1428                  * We assume here that all the packets sent to the OFFCHANNEL
1429                  * queue are sent in ROC session.
1430                  */
1431                 flush_work(&mvm->roc_done_wk);
1432         } else {
1433                 /*
1434                  * By now, all the AC queues are empty. The AGG queues are
1435                  * empty too. We already got all the Tx responses for all the
1436                  * packets in the queues. The drain work can have been
1437                  * triggered. Flush it.
1438                  */
1439                 flush_work(&mvm->sta_drained_wk);
1440         }
1441 }
1442
1443 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1444                                          struct ieee80211_vif *vif)
1445 {
1446         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1447         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1448
1449         iwl_mvm_prepare_mac_removal(mvm, vif);
1450
1451         mutex_lock(&mvm->mutex);
1452
1453         if (mvm->bf_allowed_vif == mvmvif) {
1454                 mvm->bf_allowed_vif = NULL;
1455                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1456                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1457         }
1458
1459         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1460
1461         /*
1462          * For AP/GO interface, the tear down of the resources allocated to the
1463          * interface is be handled as part of the stop_ap flow.
1464          */
1465         if (vif->type == NL80211_IFTYPE_AP ||
1466             vif->type == NL80211_IFTYPE_ADHOC) {
1467 #ifdef CONFIG_NL80211_TESTMODE
1468                 if (vif == mvm->noa_vif) {
1469                         mvm->noa_vif = NULL;
1470                         mvm->noa_duration = 0;
1471                 }
1472 #endif
1473                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1474                 goto out_release;
1475         }
1476
1477         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1478                 mvm->p2p_device_vif = NULL;
1479                 iwl_mvm_rm_bcast_sta(mvm, vif);
1480                 iwl_mvm_binding_remove_vif(mvm, vif);
1481                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1482                 mvmvif->phy_ctxt = NULL;
1483         }
1484
1485         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1486                 mvm->vif_count--;
1487
1488         iwl_mvm_power_update_mac(mvm);
1489         iwl_mvm_mac_ctxt_remove(mvm, vif);
1490
1491 out_release:
1492         iwl_mvm_mac_ctxt_release(mvm, vif);
1493         mutex_unlock(&mvm->mutex);
1494 }
1495
1496 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1497 {
1498         return 0;
1499 }
1500
1501 struct iwl_mvm_mc_iter_data {
1502         struct iwl_mvm *mvm;
1503         int port_id;
1504 };
1505
1506 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1507                                       struct ieee80211_vif *vif)
1508 {
1509         struct iwl_mvm_mc_iter_data *data = _data;
1510         struct iwl_mvm *mvm = data->mvm;
1511         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1512         int ret, len;
1513
1514         /* if we don't have free ports, mcast frames will be dropped */
1515         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1516                 return;
1517
1518         if (vif->type != NL80211_IFTYPE_STATION ||
1519             !vif->bss_conf.assoc)
1520                 return;
1521
1522         cmd->port_id = data->port_id++;
1523         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1524         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1525
1526         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1527         if (ret)
1528                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1529 }
1530
1531 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1532 {
1533         struct iwl_mvm_mc_iter_data iter_data = {
1534                 .mvm = mvm,
1535         };
1536
1537         lockdep_assert_held(&mvm->mutex);
1538
1539         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1540                 return;
1541
1542         ieee80211_iterate_active_interfaces_atomic(
1543                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1544                 iwl_mvm_mc_iface_iterator, &iter_data);
1545 }
1546
1547 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1548                                      struct netdev_hw_addr_list *mc_list)
1549 {
1550         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1551         struct iwl_mcast_filter_cmd *cmd;
1552         struct netdev_hw_addr *addr;
1553         int addr_count;
1554         bool pass_all;
1555         int len;
1556
1557         addr_count = netdev_hw_addr_list_count(mc_list);
1558         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1559                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1560         if (pass_all)
1561                 addr_count = 0;
1562
1563         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1564         cmd = kzalloc(len, GFP_ATOMIC);
1565         if (!cmd)
1566                 return 0;
1567
1568         if (pass_all) {
1569                 cmd->pass_all = 1;
1570                 return (u64)(unsigned long)cmd;
1571         }
1572
1573         netdev_hw_addr_list_for_each(addr, mc_list) {
1574                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1575                                    cmd->count, addr->addr);
1576                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1577                        addr->addr, ETH_ALEN);
1578                 cmd->count++;
1579         }
1580
1581         return (u64)(unsigned long)cmd;
1582 }
1583
1584 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1585                                      unsigned int changed_flags,
1586                                      unsigned int *total_flags,
1587                                      u64 multicast)
1588 {
1589         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1590         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1591
1592         mutex_lock(&mvm->mutex);
1593
1594         /* replace previous configuration */
1595         kfree(mvm->mcast_filter_cmd);
1596         mvm->mcast_filter_cmd = cmd;
1597
1598         if (!cmd)
1599                 goto out;
1600
1601         iwl_mvm_recalc_multicast(mvm);
1602 out:
1603         mutex_unlock(&mvm->mutex);
1604         *total_flags = 0;
1605 }
1606
1607 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1608                                         struct ieee80211_vif *vif,
1609                                         unsigned int filter_flags,
1610                                         unsigned int changed_flags)
1611 {
1612         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1613
1614         /* We support only filter for probe requests */
1615         if (!(changed_flags & FIF_PROBE_REQ))
1616                 return;
1617
1618         /* Supported only for p2p client interfaces */
1619         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1620             !vif->p2p)
1621                 return;
1622
1623         mutex_lock(&mvm->mutex);
1624         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1625         mutex_unlock(&mvm->mutex);
1626 }
1627
1628 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1629 struct iwl_bcast_iter_data {
1630         struct iwl_mvm *mvm;
1631         struct iwl_bcast_filter_cmd *cmd;
1632         u8 current_filter;
1633 };
1634
1635 static void
1636 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1637                          const struct iwl_fw_bcast_filter *in_filter,
1638                          struct iwl_fw_bcast_filter *out_filter)
1639 {
1640         struct iwl_fw_bcast_filter_attr *attr;
1641         int i;
1642
1643         memcpy(out_filter, in_filter, sizeof(*out_filter));
1644
1645         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1646                 attr = &out_filter->attrs[i];
1647
1648                 if (!attr->mask)
1649                         break;
1650
1651                 switch (attr->reserved1) {
1652                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1653                         if (vif->bss_conf.arp_addr_cnt != 1) {
1654                                 attr->mask = 0;
1655                                 continue;
1656                         }
1657
1658                         attr->val = vif->bss_conf.arp_addr_list[0];
1659                         break;
1660                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1661                         attr->val = *(__be32 *)&vif->addr[2];
1662                         break;
1663                 default:
1664                         break;
1665                 }
1666                 attr->reserved1 = 0;
1667                 out_filter->num_attrs++;
1668         }
1669 }
1670
1671 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1672                                           struct ieee80211_vif *vif)
1673 {
1674         struct iwl_bcast_iter_data *data = _data;
1675         struct iwl_mvm *mvm = data->mvm;
1676         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1677         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1678         struct iwl_fw_bcast_mac *bcast_mac;
1679         int i;
1680
1681         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1682                 return;
1683
1684         bcast_mac = &cmd->macs[mvmvif->id];
1685
1686         /*
1687          * enable filtering only for associated stations, but not for P2P
1688          * Clients
1689          */
1690         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1691             !vif->bss_conf.assoc)
1692                 return;
1693
1694         bcast_mac->default_discard = 1;
1695
1696         /* copy all configured filters */
1697         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1698                 /*
1699                  * Make sure we don't exceed our filters limit.
1700                  * if there is still a valid filter to be configured,
1701                  * be on the safe side and just allow bcast for this mac.
1702                  */
1703                 if (WARN_ON_ONCE(data->current_filter >=
1704                                  ARRAY_SIZE(cmd->filters))) {
1705                         bcast_mac->default_discard = 0;
1706                         bcast_mac->attached_filters = 0;
1707                         break;
1708                 }
1709
1710                 iwl_mvm_set_bcast_filter(vif,
1711                                          &mvm->bcast_filters[i],
1712                                          &cmd->filters[data->current_filter]);
1713
1714                 /* skip current filter if it contains no attributes */
1715                 if (!cmd->filters[data->current_filter].num_attrs)
1716                         continue;
1717
1718                 /* attach the filter to current mac */
1719                 bcast_mac->attached_filters |=
1720                                 cpu_to_le16(BIT(data->current_filter));
1721
1722                 data->current_filter++;
1723         }
1724 }
1725
1726 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1727                                     struct iwl_bcast_filter_cmd *cmd)
1728 {
1729         struct iwl_bcast_iter_data iter_data = {
1730                 .mvm = mvm,
1731                 .cmd = cmd,
1732         };
1733
1734         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1735                 return false;
1736
1737         memset(cmd, 0, sizeof(*cmd));
1738         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1739         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1740
1741 #ifdef CONFIG_IWLWIFI_DEBUGFS
1742         /* use debugfs filters/macs if override is configured */
1743         if (mvm->dbgfs_bcast_filtering.override) {
1744                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1745                        sizeof(cmd->filters));
1746                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1747                        sizeof(cmd->macs));
1748                 return true;
1749         }
1750 #endif
1751
1752         /* if no filters are configured, do nothing */
1753         if (!mvm->bcast_filters)
1754                 return false;
1755
1756         /* configure and attach these filters for each associated sta vif */
1757         ieee80211_iterate_active_interfaces(
1758                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1759                 iwl_mvm_bcast_filter_iterator, &iter_data);
1760
1761         return true;
1762 }
1763
1764 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1765 {
1766         struct iwl_bcast_filter_cmd cmd;
1767
1768         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1769                 return 0;
1770
1771         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1772                 return 0;
1773
1774         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1775                                     sizeof(cmd), &cmd);
1776 }
1777 #else
1778 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1779 {
1780         return 0;
1781 }
1782 #endif
1783
1784 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1785                                     struct ieee80211_vif *vif)
1786 {
1787         struct iwl_mu_group_mgmt_cmd cmd = {};
1788
1789         memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1790                WLAN_MEMBERSHIP_LEN);
1791         memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1792                WLAN_USER_POSITION_LEN);
1793
1794         return iwl_mvm_send_cmd_pdu(mvm,
1795                                     WIDE_ID(DATA_PATH_GROUP,
1796                                             UPDATE_MU_GROUPS_CMD),
1797                                     0, sizeof(cmd), &cmd);
1798 }
1799
1800 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1801                                            struct ieee80211_vif *vif)
1802 {
1803         if (vif->mu_mimo_owner) {
1804                 struct iwl_mu_group_mgmt_notif *notif = _data;
1805
1806                 /*
1807                  * MU-MIMO Group Id action frame is little endian. We treat
1808                  * the data received from firmware as if it came from the
1809                  * action frame, so no conversion is needed.
1810                  */
1811                 ieee80211_update_mu_groups(vif,
1812                                            (u8 *)&notif->membership_status,
1813                                            (u8 *)&notif->user_position);
1814         }
1815 }
1816
1817 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1818                                struct iwl_rx_cmd_buffer *rxb)
1819 {
1820         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1821         struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1822
1823         ieee80211_iterate_active_interfaces_atomic(
1824                         mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1825                         iwl_mvm_mu_mimo_iface_iterator, notif);
1826 }
1827
1828 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1829                                              struct ieee80211_vif *vif,
1830                                              struct ieee80211_bss_conf *bss_conf,
1831                                              u32 changes)
1832 {
1833         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1834         int ret;
1835
1836         /*
1837          * Re-calculate the tsf id, as the master-slave relations depend on the
1838          * beacon interval, which was not known when the station interface was
1839          * added.
1840          */
1841         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1842                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1843
1844         if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
1845             mvmvif->lqm_active)
1846                 iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
1847                                      0, 0);
1848
1849         /*
1850          * If we're not associated yet, take the (new) BSSID before associating
1851          * so the firmware knows. If we're already associated, then use the old
1852          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1853          * branch for disassociation below.
1854          */
1855         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1856                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1857
1858         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1859         if (ret)
1860                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1861
1862         /* after sending it once, adopt mac80211 data */
1863         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1864         mvmvif->associated = bss_conf->assoc;
1865
1866         if (changes & BSS_CHANGED_ASSOC) {
1867                 if (bss_conf->assoc) {
1868                         /* clear statistics to get clean beacon counter */
1869                         iwl_mvm_request_statistics(mvm, true);
1870                         memset(&mvmvif->beacon_stats, 0,
1871                                sizeof(mvmvif->beacon_stats));
1872
1873                         /* add quota for this interface */
1874                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1875                         if (ret) {
1876                                 IWL_ERR(mvm, "failed to update quotas\n");
1877                                 return;
1878                         }
1879
1880                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1881                                      &mvm->status)) {
1882                                 /*
1883                                  * If we're restarting then the firmware will
1884                                  * obviously have lost synchronisation with
1885                                  * the AP. It will attempt to synchronise by
1886                                  * itself, but we can make it more reliable by
1887                                  * scheduling a session protection time event.
1888                                  *
1889                                  * The firmware needs to receive a beacon to
1890                                  * catch up with synchronisation, use 110% of
1891                                  * the beacon interval.
1892                                  *
1893                                  * Set a large maximum delay to allow for more
1894                                  * than a single interface.
1895                                  */
1896                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1897                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1898                                                         5 * dur, false);
1899                         }
1900
1901                         iwl_mvm_sf_update(mvm, vif, false);
1902                         iwl_mvm_power_vif_assoc(mvm, vif);
1903                         if (vif->p2p) {
1904                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1905                                 iwl_mvm_update_smps(mvm, vif,
1906                                                     IWL_MVM_SMPS_REQ_PROT,
1907                                                     IEEE80211_SMPS_DYNAMIC);
1908                         }
1909                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1910                         /*
1911                          * If update fails - SF might be running in associated
1912                          * mode while disassociated - which is forbidden.
1913                          */
1914                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1915                                   "Failed to update SF upon disassociation\n");
1916
1917                         /* remove AP station now that the MAC is unassoc */
1918                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1919                         if (ret)
1920                                 IWL_ERR(mvm, "failed to remove AP station\n");
1921
1922                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1923                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1924                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1925                         /* remove quota for this interface */
1926                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
1927                         if (ret)
1928                                 IWL_ERR(mvm, "failed to update quotas\n");
1929
1930                         if (vif->p2p)
1931                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1932
1933                         /* this will take the cleared BSSID from bss_conf */
1934                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1935                         if (ret)
1936                                 IWL_ERR(mvm,
1937                                         "failed to update MAC %pM (clear after unassoc)\n",
1938                                         vif->addr);
1939                 }
1940
1941                 /*
1942                  * The firmware tracks the MU-MIMO group on its own.
1943                  * However, on HW restart we should restore this data.
1944                  */
1945                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1946                     (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1947                         ret = iwl_mvm_update_mu_groups(mvm, vif);
1948                         if (ret)
1949                                 IWL_ERR(mvm,
1950                                         "failed to update VHT MU_MIMO groups\n");
1951                 }
1952
1953                 iwl_mvm_recalc_multicast(mvm);
1954                 iwl_mvm_configure_bcast_filter(mvm);
1955
1956                 /* reset rssi values */
1957                 mvmvif->bf_data.ave_beacon_signal = 0;
1958
1959                 iwl_mvm_bt_coex_vif_change(mvm);
1960                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1961                                     IEEE80211_SMPS_AUTOMATIC);
1962                 if (fw_has_capa(&mvm->fw->ucode_capa,
1963                                 IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1964                         iwl_mvm_config_scan(mvm);
1965         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1966                 /*
1967                  * We received a beacon _after_ association so
1968                  * remove the session protection.
1969                  */
1970                 iwl_mvm_remove_time_event(mvm, mvmvif,
1971                                           &mvmvif->time_event_data);
1972         }
1973
1974         if (changes & BSS_CHANGED_BEACON_INFO) {
1975                 iwl_mvm_sf_update(mvm, vif, false);
1976                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1977         }
1978
1979         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
1980                        /*
1981                         * Send power command on every beacon change,
1982                         * because we may have not enabled beacon abort yet.
1983                         */
1984                        BSS_CHANGED_BEACON_INFO)) {
1985                 ret = iwl_mvm_power_update_mac(mvm);
1986                 if (ret)
1987                         IWL_ERR(mvm, "failed to update power mode\n");
1988         }
1989
1990         if (changes & BSS_CHANGED_TXPOWER) {
1991                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1992                                 bss_conf->txpower);
1993                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1994         }
1995
1996         if (changes & BSS_CHANGED_CQM) {
1997                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1998                 /* reset cqm events tracking */
1999                 mvmvif->bf_data.last_cqm_event = 0;
2000                 if (mvmvif->bf_data.bf_enabled) {
2001                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2002                         if (ret)
2003                                 IWL_ERR(mvm,
2004                                         "failed to update CQM thresholds\n");
2005                 }
2006         }
2007
2008         if (changes & BSS_CHANGED_ARP_FILTER) {
2009                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2010                 iwl_mvm_configure_bcast_filter(mvm);
2011         }
2012 }
2013
2014 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2015                                  struct ieee80211_vif *vif)
2016 {
2017         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2018         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2019         int ret;
2020
2021         /*
2022          * iwl_mvm_mac_ctxt_add() might read directly from the device
2023          * (the system time), so make sure it is available.
2024          */
2025         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2026         if (ret)
2027                 return ret;
2028
2029         mutex_lock(&mvm->mutex);
2030
2031         /* Send the beacon template */
2032         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2033         if (ret)
2034                 goto out_unlock;
2035
2036         /*
2037          * Re-calculate the tsf id, as the master-slave relations depend on the
2038          * beacon interval, which was not known when the AP interface was added.
2039          */
2040         if (vif->type == NL80211_IFTYPE_AP)
2041                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2042
2043         mvmvif->ap_assoc_sta_count = 0;
2044
2045         /* Add the mac context */
2046         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2047         if (ret)
2048                 goto out_unlock;
2049
2050         /* Perform the binding */
2051         ret = iwl_mvm_binding_add_vif(mvm, vif);
2052         if (ret)
2053                 goto out_remove;
2054
2055         /* Send the bcast station. At this stage the TBTT and DTIM time events
2056          * are added and applied to the scheduler */
2057         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2058         if (ret)
2059                 goto out_unbind;
2060
2061         /* must be set before quota calculations */
2062         mvmvif->ap_ibss_active = true;
2063
2064         /* power updated needs to be done before quotas */
2065         iwl_mvm_power_update_mac(mvm);
2066
2067         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2068         if (ret)
2069                 goto out_quota_failed;
2070
2071         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2072         if (vif->p2p && mvm->p2p_device_vif)
2073                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2074
2075         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2076
2077         iwl_mvm_bt_coex_vif_change(mvm);
2078
2079         /* we don't support TDLS during DCM */
2080         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2081                 iwl_mvm_teardown_tdls_peers(mvm);
2082
2083         goto out_unlock;
2084
2085 out_quota_failed:
2086         iwl_mvm_power_update_mac(mvm);
2087         mvmvif->ap_ibss_active = false;
2088         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2089 out_unbind:
2090         iwl_mvm_binding_remove_vif(mvm, vif);
2091 out_remove:
2092         iwl_mvm_mac_ctxt_remove(mvm, vif);
2093 out_unlock:
2094         mutex_unlock(&mvm->mutex);
2095         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2096         return ret;
2097 }
2098
2099 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2100                                  struct ieee80211_vif *vif)
2101 {
2102         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2103         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2104
2105         iwl_mvm_prepare_mac_removal(mvm, vif);
2106
2107         mutex_lock(&mvm->mutex);
2108
2109         /* Handle AP stop while in CSA */
2110         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2111                 iwl_mvm_remove_time_event(mvm, mvmvif,
2112                                           &mvmvif->time_event_data);
2113                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2114                 mvmvif->csa_countdown = false;
2115         }
2116
2117         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2118                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2119                 mvm->csa_tx_block_bcn_timeout = 0;
2120         }
2121
2122         mvmvif->ap_ibss_active = false;
2123         mvm->ap_last_beacon_gp2 = 0;
2124
2125         iwl_mvm_bt_coex_vif_change(mvm);
2126
2127         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2128
2129         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2130         if (vif->p2p && mvm->p2p_device_vif)
2131                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2132
2133         iwl_mvm_update_quotas(mvm, false, NULL);
2134         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2135         iwl_mvm_binding_remove_vif(mvm, vif);
2136
2137         iwl_mvm_power_update_mac(mvm);
2138
2139         iwl_mvm_mac_ctxt_remove(mvm, vif);
2140
2141         mutex_unlock(&mvm->mutex);
2142 }
2143
2144 static void
2145 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2146                                  struct ieee80211_vif *vif,
2147                                  struct ieee80211_bss_conf *bss_conf,
2148                                  u32 changes)
2149 {
2150         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2151
2152         /* Changes will be applied when the AP/IBSS is started */
2153         if (!mvmvif->ap_ibss_active)
2154                 return;
2155
2156         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2157                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2158             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2159                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2160
2161         /* Need to send a new beacon template to the FW */
2162         if (changes & BSS_CHANGED_BEACON &&
2163             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2164                 IWL_WARN(mvm, "Failed updating beacon data\n");
2165
2166         if (changes & BSS_CHANGED_TXPOWER) {
2167                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2168                                 bss_conf->txpower);
2169                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2170         }
2171 }
2172
2173 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2174                                      struct ieee80211_vif *vif,
2175                                      struct ieee80211_bss_conf *bss_conf,
2176                                      u32 changes)
2177 {
2178         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2179
2180         /*
2181          * iwl_mvm_bss_info_changed_station() might call
2182          * iwl_mvm_protect_session(), which reads directly from
2183          * the device (the system time), so make sure it is available.
2184          */
2185         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2186                 return;
2187
2188         mutex_lock(&mvm->mutex);
2189
2190         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2191                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2192
2193         switch (vif->type) {
2194         case NL80211_IFTYPE_STATION:
2195                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2196                 break;
2197         case NL80211_IFTYPE_AP:
2198         case NL80211_IFTYPE_ADHOC:
2199                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2200                 break;
2201         default:
2202                 /* shouldn't happen */
2203                 WARN_ON_ONCE(1);
2204         }
2205
2206         mutex_unlock(&mvm->mutex);
2207         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2208 }
2209
2210 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2211                                struct ieee80211_vif *vif,
2212                                struct ieee80211_scan_request *hw_req)
2213 {
2214         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2215         int ret;
2216
2217         if (hw_req->req.n_channels == 0 ||
2218             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2219                 return -EINVAL;
2220
2221         mutex_lock(&mvm->mutex);
2222         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2223         mutex_unlock(&mvm->mutex);
2224
2225         return ret;
2226 }
2227
2228 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2229                                        struct ieee80211_vif *vif)
2230 {
2231         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2232
2233         mutex_lock(&mvm->mutex);
2234
2235         /* Due to a race condition, it's possible that mac80211 asks
2236          * us to stop a hw_scan when it's already stopped.  This can
2237          * happen, for instance, if we stopped the scan ourselves,
2238          * called ieee80211_scan_completed() and the userspace called
2239          * cancel scan scan before ieee80211_scan_work() could run.
2240          * To handle that, simply return if the scan is not running.
2241         */
2242         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2243                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2244
2245         mutex_unlock(&mvm->mutex);
2246 }
2247
2248 static void
2249 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2250                                   struct ieee80211_sta *sta, u16 tids,
2251                                   int num_frames,
2252                                   enum ieee80211_frame_release_type reason,
2253                                   bool more_data)
2254 {
2255         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2256
2257         /* Called when we need to transmit (a) frame(s) from mac80211 */
2258
2259         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2260                                           tids, more_data, false);
2261 }
2262
2263 static void
2264 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2265                                     struct ieee80211_sta *sta, u16 tids,
2266                                     int num_frames,
2267                                     enum ieee80211_frame_release_type reason,
2268                                     bool more_data)
2269 {
2270         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2271
2272         /* Called when we need to transmit (a) frame(s) from agg queue */
2273
2274         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2275                                           tids, more_data, true);
2276 }
2277
2278 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2279                                    struct ieee80211_vif *vif,
2280                                    enum sta_notify_cmd cmd,
2281                                    struct ieee80211_sta *sta)
2282 {
2283         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2284         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2285         unsigned long txqs = 0, tids = 0;
2286         int tid;
2287
2288         spin_lock_bh(&mvmsta->lock);
2289         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2290                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2291
2292                 if (tid_data->state != IWL_AGG_ON &&
2293                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2294                         continue;
2295
2296                 __set_bit(tid_data->txq_id, &txqs);
2297
2298                 if (iwl_mvm_tid_queued(tid_data) == 0)
2299                         continue;
2300
2301                 __set_bit(tid, &tids);
2302         }
2303
2304         switch (cmd) {
2305         case STA_NOTIFY_SLEEP:
2306                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2307                         ieee80211_sta_block_awake(hw, sta, true);
2308
2309                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2310                         ieee80211_sta_set_buffered(sta, tid, true);
2311
2312                 if (txqs)
2313                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2314                 /*
2315                  * The fw updates the STA to be asleep. Tx packets on the Tx
2316                  * queues to this station will not be transmitted. The fw will
2317                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2318                  */
2319                 break;
2320         case STA_NOTIFY_AWAKE:
2321                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2322                         break;
2323
2324                 if (txqs)
2325                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2326                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2327                 break;
2328         default:
2329                 break;
2330         }
2331         spin_unlock_bh(&mvmsta->lock);
2332 }
2333
2334 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2335                                        struct ieee80211_vif *vif,
2336                                        struct ieee80211_sta *sta)
2337 {
2338         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2339         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2340
2341         /*
2342          * This is called before mac80211 does RCU synchronisation,
2343          * so here we already invalidate our internal RCU-protected
2344          * station pointer. The rest of the code will thus no longer
2345          * be able to find the station this way, and we don't rely
2346          * on further RCU synchronisation after the sta_state()
2347          * callback deleted the station.
2348          */
2349         mutex_lock(&mvm->mutex);
2350         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2351                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2352                                    ERR_PTR(-ENOENT));
2353
2354         mutex_unlock(&mvm->mutex);
2355 }
2356
2357 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2358                                 const u8 *bssid)
2359 {
2360         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2361                 return;
2362
2363         if (vif->p2p && !iwl_mvm_is_p2p_standalone_uapsd_supported(mvm)) {
2364                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2365                 return;
2366         }
2367
2368         if (!vif->p2p &&
2369             (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) {
2370                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2371                 return;
2372         }
2373
2374         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2375 }
2376
2377 static void
2378 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2379                            struct ieee80211_vif *vif, u8 *peer_addr,
2380                            enum nl80211_tdls_operation action)
2381 {
2382         struct iwl_fw_dbg_trigger_tlv *trig;
2383         struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2384
2385         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2386                 return;
2387
2388         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2389         tdls_trig = (void *)trig->data;
2390         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2391                 return;
2392
2393         if (!(tdls_trig->action_bitmap & BIT(action)))
2394                 return;
2395
2396         if (tdls_trig->peer_mode &&
2397             memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2398                 return;
2399
2400         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2401                                     "TDLS event occurred, peer %pM, action %d",
2402                                     peer_addr, action);
2403 }
2404
2405 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm,
2406                                              struct iwl_mvm_sta *mvm_sta)
2407 {
2408         struct iwl_mvm_tid_data *tid_data;
2409         struct sk_buff *skb;
2410         int i;
2411
2412         spin_lock_bh(&mvm_sta->lock);
2413         for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
2414                 tid_data = &mvm_sta->tid_data[i];
2415                 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames)))
2416                         ieee80211_free_txskb(mvm->hw, skb);
2417         }
2418         spin_unlock_bh(&mvm_sta->lock);
2419 }
2420
2421 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2422                                  struct ieee80211_vif *vif,
2423                                  struct ieee80211_sta *sta,
2424                                  enum ieee80211_sta_state old_state,
2425                                  enum ieee80211_sta_state new_state)
2426 {
2427         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2428         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2429         int ret;
2430
2431         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2432                            sta->addr, old_state, new_state);
2433
2434         /* this would be a mac80211 bug ... but don't crash */
2435         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2436                 return -EINVAL;
2437
2438         /* if a STA is being removed, reuse its ID */
2439         flush_work(&mvm->sta_drained_wk);
2440
2441         /*
2442          * If we are in a STA removal flow and in DQA mode:
2443          *
2444          * This is after the sync_rcu part, so the queues have already been
2445          * flushed. No more TXs on their way in mac80211's path, and no more in
2446          * the queues.
2447          * Also, we won't be getting any new TX frames for this station.
2448          * What we might have are deferred TX frames that need to be taken care
2449          * of.
2450          *
2451          * Drop any still-queued deferred-frame before removing the STA, and
2452          * make sure the worker is no longer handling frames for this STA.
2453          */
2454         if (old_state == IEEE80211_STA_NONE &&
2455             new_state == IEEE80211_STA_NOTEXIST &&
2456             iwl_mvm_is_dqa_supported(mvm)) {
2457                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2458
2459                 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta);
2460                 flush_work(&mvm->add_stream_wk);
2461
2462                 /*
2463                  * No need to make sure deferred TX indication is off since the
2464                  * worker will already remove it if it was on
2465                  */
2466         }
2467
2468         mutex_lock(&mvm->mutex);
2469         if (old_state == IEEE80211_STA_NOTEXIST &&
2470             new_state == IEEE80211_STA_NONE) {
2471                 /*
2472                  * Firmware bug - it'll crash if the beacon interval is less
2473                  * than 16. We can't avoid connecting at all, so refuse the
2474                  * station state change, this will cause mac80211 to abandon
2475                  * attempts to connect to this AP, and eventually wpa_s will
2476                  * blacklist the AP...
2477                  */
2478                 if (vif->type == NL80211_IFTYPE_STATION &&
2479                     vif->bss_conf.beacon_int < 16) {
2480                         IWL_ERR(mvm,
2481                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2482                                 sta->addr, vif->bss_conf.beacon_int);
2483                         ret = -EINVAL;
2484                         goto out_unlock;
2485                 }
2486
2487                 if (sta->tdls &&
2488                     (vif->p2p ||
2489                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2490                                                 IWL_MVM_TDLS_STA_COUNT ||
2491                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2492                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2493                         ret = -EBUSY;
2494                         goto out_unlock;
2495                 }
2496
2497                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2498                 if (sta->tdls && ret == 0) {
2499                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2500                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2501                                                    NL80211_TDLS_SETUP);
2502                 }
2503         } else if (old_state == IEEE80211_STA_NONE &&
2504                    new_state == IEEE80211_STA_AUTH) {
2505                 /*
2506                  * EBS may be disabled due to previous failures reported by FW.
2507                  * Reset EBS status here assuming environment has been changed.
2508                  */
2509                 mvm->last_ebs_successful = true;
2510                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2511                 ret = 0;
2512         } else if (old_state == IEEE80211_STA_AUTH &&
2513                    new_state == IEEE80211_STA_ASSOC) {
2514                 if (vif->type == NL80211_IFTYPE_AP) {
2515                         mvmvif->ap_assoc_sta_count++;
2516                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2517                 }
2518                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2519                 if (ret == 0)
2520                         iwl_mvm_rs_rate_init(mvm, sta,
2521                                              mvmvif->phy_ctxt->channel->band,
2522                                              true);
2523         } else if (old_state == IEEE80211_STA_ASSOC &&
2524                    new_state == IEEE80211_STA_AUTHORIZED) {
2525
2526                 /* we don't support TDLS during DCM */
2527                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2528                         iwl_mvm_teardown_tdls_peers(mvm);
2529
2530                 if (sta->tdls)
2531                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2532                                                    NL80211_TDLS_ENABLE_LINK);
2533
2534                 /* enable beacon filtering */
2535                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2536                 ret = 0;
2537         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2538                    new_state == IEEE80211_STA_ASSOC) {
2539                 /* disable beacon filtering */
2540                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2541                 ret = 0;
2542         } else if (old_state == IEEE80211_STA_ASSOC &&
2543                    new_state == IEEE80211_STA_AUTH) {
2544                 if (vif->type == NL80211_IFTYPE_AP) {
2545                         mvmvif->ap_assoc_sta_count--;
2546                         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2547                 }
2548                 ret = 0;
2549         } else if (old_state == IEEE80211_STA_AUTH &&
2550                    new_state == IEEE80211_STA_NONE) {
2551                 ret = 0;
2552         } else if (old_state == IEEE80211_STA_NONE &&
2553                    new_state == IEEE80211_STA_NOTEXIST) {
2554                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2555                 if (sta->tdls) {
2556                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2557                         iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2558                                                    NL80211_TDLS_DISABLE_LINK);
2559                 }
2560         } else {
2561                 ret = -EIO;
2562         }
2563  out_unlock:
2564         mutex_unlock(&mvm->mutex);
2565
2566         if (sta->tdls && ret == 0) {
2567                 if (old_state == IEEE80211_STA_NOTEXIST &&
2568                     new_state == IEEE80211_STA_NONE)
2569                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2570                 else if (old_state == IEEE80211_STA_NONE &&
2571                          new_state == IEEE80211_STA_NOTEXIST)
2572                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2573         }
2574
2575         return ret;
2576 }
2577
2578 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2579 {
2580         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2581
2582         mvm->rts_threshold = value;
2583
2584         return 0;
2585 }
2586
2587 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2588                                   struct ieee80211_vif *vif,
2589                                   struct ieee80211_sta *sta, u32 changed)
2590 {
2591         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2592
2593         if (vif->type == NL80211_IFTYPE_STATION &&
2594             changed & IEEE80211_RC_NSS_CHANGED)
2595                 iwl_mvm_sf_update(mvm, vif, false);
2596 }
2597
2598 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2599                                struct ieee80211_vif *vif, u16 ac,
2600                                const struct ieee80211_tx_queue_params *params)
2601 {
2602         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2603         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2604
2605         mvmvif->queue_params[ac] = *params;
2606
2607         /*
2608          * No need to update right away, we'll get BSS_CHANGED_QOS
2609          * The exception is P2P_DEVICE interface which needs immediate update.
2610          */
2611         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2612                 int ret;
2613
2614                 mutex_lock(&mvm->mutex);
2615                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2616                 mutex_unlock(&mvm->mutex);
2617                 return ret;
2618         }
2619         return 0;
2620 }
2621
2622 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2623                                       struct ieee80211_vif *vif)
2624 {
2625         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2626         u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2627         u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2628
2629         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2630                 return;
2631
2632         /*
2633          * iwl_mvm_protect_session() reads directly from the device
2634          * (the system time), so make sure it is available.
2635          */
2636         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2637                 return;
2638
2639         mutex_lock(&mvm->mutex);
2640         /* Try really hard to protect the session and hear a beacon */
2641         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2642         mutex_unlock(&mvm->mutex);
2643
2644         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2645 }
2646
2647 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2648                                         struct ieee80211_vif *vif,
2649                                         struct cfg80211_sched_scan_request *req,
2650                                         struct ieee80211_scan_ies *ies)
2651 {
2652         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2653
2654         int ret;
2655
2656         mutex_lock(&mvm->mutex);
2657
2658         if (!vif->bss_conf.idle) {
2659                 ret = -EBUSY;
2660                 goto out;
2661         }
2662
2663         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2664
2665 out:
2666         mutex_unlock(&mvm->mutex);
2667         return ret;
2668 }
2669
2670 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2671                                        struct ieee80211_vif *vif)
2672 {
2673         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2674         int ret;
2675
2676         mutex_lock(&mvm->mutex);
2677
2678         /* Due to a race condition, it's possible that mac80211 asks
2679          * us to stop a sched_scan when it's already stopped.  This
2680          * can happen, for instance, if we stopped the scan ourselves,
2681          * called ieee80211_sched_scan_stopped() and the userspace called
2682          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2683          * could run.  To handle this, simply return if the scan is
2684          * not running.
2685         */
2686         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2687                 mutex_unlock(&mvm->mutex);
2688                 return 0;
2689         }
2690
2691         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2692         mutex_unlock(&mvm->mutex);
2693         iwl_mvm_wait_for_async_handlers(mvm);
2694
2695         return ret;
2696 }
2697
2698 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2699                                enum set_key_cmd cmd,
2700                                struct ieee80211_vif *vif,
2701                                struct ieee80211_sta *sta,
2702                                struct ieee80211_key_conf *key)
2703 {
2704         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2705         struct iwl_mvm_sta *mvmsta;
2706         struct iwl_mvm_key_pn *ptk_pn;
2707         int keyidx = key->keyidx;
2708         int ret;
2709         u8 key_offset;
2710
2711         if (iwlwifi_mod_params.sw_crypto) {
2712                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2713                 return -EOPNOTSUPP;
2714         }
2715
2716         switch (key->cipher) {
2717         case WLAN_CIPHER_SUITE_TKIP:
2718                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2719                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2720                 break;
2721         case WLAN_CIPHER_SUITE_CCMP:
2722                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2723                 break;
2724         case WLAN_CIPHER_SUITE_AES_CMAC:
2725                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2726                 break;
2727         case WLAN_CIPHER_SUITE_WEP40:
2728         case WLAN_CIPHER_SUITE_WEP104:
2729                 /* For non-client mode, only use WEP keys for TX as we probably
2730                  * don't have a station yet anyway and would then have to keep
2731                  * track of the keys, linking them to each of the clients/peers
2732                  * as they appear. For now, don't do that, for performance WEP
2733                  * offload doesn't really matter much, but we need it for some
2734                  * other offload features in client mode.
2735                  */
2736                 if (vif->type != NL80211_IFTYPE_STATION)
2737                         return 0;
2738                 break;
2739         default:
2740                 /* currently FW supports only one optional cipher scheme */
2741                 if (hw->n_cipher_schemes &&
2742                     hw->cipher_schemes->cipher == key->cipher)
2743                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2744                 else
2745                         return -EOPNOTSUPP;
2746         }
2747
2748         mutex_lock(&mvm->mutex);
2749
2750         switch (cmd) {
2751         case SET_KEY:
2752                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2753                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2754                         /*
2755                          * GTK on AP interface is a TX-only key, return 0;
2756                          * on IBSS they're per-station and because we're lazy
2757                          * we don't support them for RX, so do the same.
2758                          * CMAC in AP/IBSS modes must be done in software.
2759                          */
2760                         if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2761                                 ret = -EOPNOTSUPP;
2762                         else
2763                                 ret = 0;
2764                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2765                         break;
2766                 }
2767
2768                 /* During FW restart, in order to restore the state as it was,
2769                  * don't try to reprogram keys we previously failed for.
2770                  */
2771                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2772                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2773                         IWL_DEBUG_MAC80211(mvm,
2774                                            "skip invalid idx key programming during restart\n");
2775                         ret = 0;
2776                         break;
2777                 }
2778
2779                 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2780                     sta && iwl_mvm_has_new_rx_api(mvm) &&
2781                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2782                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2783                      key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2784                         struct ieee80211_key_seq seq;
2785                         int tid, q;
2786
2787                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2788                         WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2789                         ptk_pn = kzalloc(sizeof(*ptk_pn) +
2790                                          mvm->trans->num_rx_queues *
2791                                                 sizeof(ptk_pn->q[0]),
2792                                          GFP_KERNEL);
2793                         if (!ptk_pn) {
2794                                 ret = -ENOMEM;
2795                                 break;
2796                         }
2797
2798                         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2799                                 ieee80211_get_key_rx_seq(key, tid, &seq);
2800                                 for (q = 0; q < mvm->trans->num_rx_queues; q++)
2801                                         memcpy(ptk_pn->q[q].pn[tid],
2802                                                seq.ccmp.pn,
2803                                                IEEE80211_CCMP_PN_LEN);
2804                         }
2805
2806                         rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2807                 }
2808
2809                 /* in HW restart reuse the index, otherwise request a new one */
2810                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2811                         key_offset = key->hw_key_idx;
2812                 else
2813                         key_offset = STA_KEY_IDX_INVALID;
2814
2815                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2816                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2817                 if (ret) {
2818                         IWL_WARN(mvm, "set key failed\n");
2819                         /*
2820                          * can't add key for RX, but we don't need it
2821                          * in the device for TX so still return 0
2822                          */
2823                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2824                         ret = 0;
2825                 }
2826
2827                 break;
2828         case DISABLE_KEY:
2829                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2830                         ret = 0;
2831                         break;
2832                 }
2833
2834                 if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2835                     key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2836                     (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2837                      key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2838                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
2839                         ptk_pn = rcu_dereference_protected(
2840                                                 mvmsta->ptk_pn[keyidx],
2841                                                 lockdep_is_held(&mvm->mutex));
2842                         RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2843                         if (ptk_pn)
2844                                 kfree_rcu(ptk_pn, rcu_head);
2845                 }
2846
2847                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2848                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2849                 break;
2850         default:
2851                 ret = -EINVAL;
2852         }
2853
2854         mutex_unlock(&mvm->mutex);
2855         return ret;
2856 }
2857
2858 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2859                                         struct ieee80211_vif *vif,
2860                                         struct ieee80211_key_conf *keyconf,
2861                                         struct ieee80211_sta *sta,
2862                                         u32 iv32, u16 *phase1key)
2863 {
2864         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2865
2866         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2867                 return;
2868
2869         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2870 }
2871
2872
2873 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2874                                struct iwl_rx_packet *pkt, void *data)
2875 {
2876         struct iwl_mvm *mvm =
2877                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2878         struct iwl_hs20_roc_res *resp;
2879         int resp_len = iwl_rx_packet_payload_len(pkt);
2880         struct iwl_mvm_time_event_data *te_data = data;
2881
2882         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2883                 return true;
2884
2885         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2886                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2887                 return true;
2888         }
2889
2890         resp = (void *)pkt->data;
2891
2892         IWL_DEBUG_TE(mvm,
2893                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2894                      resp->status, resp->event_unique_id);
2895
2896         te_data->uid = le32_to_cpu(resp->event_unique_id);
2897         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2898                      te_data->uid);
2899
2900         spin_lock_bh(&mvm->time_event_lock);
2901         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2902         spin_unlock_bh(&mvm->time_event_lock);
2903
2904         return true;
2905 }
2906
2907 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2908 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2909 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2910 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2911 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2912 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2913                                     struct ieee80211_channel *channel,
2914                                     struct ieee80211_vif *vif,
2915                                     int duration)
2916 {
2917         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2918         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2919         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2920         static const u16 time_event_response[] = { HOT_SPOT_CMD };
2921         struct iwl_notification_wait wait_time_event;
2922         u32 dtim_interval = vif->bss_conf.dtim_period *
2923                 vif->bss_conf.beacon_int;
2924         u32 req_dur, delay;
2925         struct iwl_hs20_roc_req aux_roc_req = {
2926                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2927                 .id_and_color =
2928                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2929                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2930                 /* Set the channel info data */
2931                 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ?
2932                         PHY_BAND_24 : PHY_BAND_5,
2933                 .channel_info.channel = channel->hw_value,
2934                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2935                 /* Set the time and duration */
2936                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2937          };
2938
2939         delay = AUX_ROC_MIN_DELAY;
2940         req_dur = MSEC_TO_TU(duration);
2941
2942         /*
2943          * If we are associated we want the delay time to be at least one
2944          * dtim interval so that the FW can wait until after the DTIM and
2945          * then start the time event, this will potentially allow us to
2946          * remain off-channel for the max duration.
2947          * Since we want to use almost a whole dtim interval we would also
2948          * like the delay to be for 2-3 dtim intervals, in case there are
2949          * other time events with higher priority.
2950          */
2951         if (vif->bss_conf.assoc) {
2952                 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
2953                 /* We cannot remain off-channel longer than the DTIM interval */
2954                 if (dtim_interval <= req_dur) {
2955                         req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
2956                         if (req_dur <= AUX_ROC_MIN_DURATION)
2957                                 req_dur = dtim_interval -
2958                                         AUX_ROC_MIN_SAFETY_BUFFER;
2959                 }
2960         }
2961
2962         aux_roc_req.duration = cpu_to_le32(req_dur);
2963         aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
2964
2965         IWL_DEBUG_TE(mvm,
2966                      "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
2967                      channel->hw_value, req_dur, duration, delay,
2968                      dtim_interval);
2969         /* Set the node address */
2970         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2971
2972         lockdep_assert_held(&mvm->mutex);
2973
2974         spin_lock_bh(&mvm->time_event_lock);
2975
2976         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2977                 spin_unlock_bh(&mvm->time_event_lock);
2978                 return -EIO;
2979         }
2980
2981         te_data->vif = vif;
2982         te_data->duration = duration;
2983         te_data->id = HOT_SPOT_CMD;
2984
2985         spin_unlock_bh(&mvm->time_event_lock);
2986
2987         /*
2988          * Use a notification wait, which really just processes the
2989          * command response and doesn't wait for anything, in order
2990          * to be able to process the response and get the UID inside
2991          * the RX path. Using CMD_WANT_SKB doesn't work because it
2992          * stores the buffer and then wakes up this thread, by which
2993          * time another notification (that the time event started)
2994          * might already be processed unsuccessfully.
2995          */
2996         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2997                                    time_event_response,
2998                                    ARRAY_SIZE(time_event_response),
2999                                    iwl_mvm_rx_aux_roc, te_data);
3000
3001         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3002                                    &aux_roc_req);
3003
3004         if (res) {
3005                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3006                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3007                 goto out_clear_te;
3008         }
3009
3010         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3011         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3012         /* should never fail */
3013         WARN_ON_ONCE(res);
3014
3015         if (res) {
3016  out_clear_te:
3017                 spin_lock_bh(&mvm->time_event_lock);
3018                 iwl_mvm_te_clear_data(mvm, te_data);
3019                 spin_unlock_bh(&mvm->time_event_lock);
3020         }
3021
3022         return res;
3023 }
3024
3025 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3026                        struct ieee80211_vif *vif,
3027                        struct ieee80211_channel *channel,
3028                        int duration,
3029                        enum ieee80211_roc_type type)
3030 {
3031         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3032         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3033         struct cfg80211_chan_def chandef;
3034         struct iwl_mvm_phy_ctxt *phy_ctxt;
3035         int ret, i;
3036
3037         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3038                            duration, type);
3039
3040         flush_work(&mvm->roc_done_wk);
3041
3042         mutex_lock(&mvm->mutex);
3043
3044         switch (vif->type) {
3045         case NL80211_IFTYPE_STATION:
3046                 if (fw_has_capa(&mvm->fw->ucode_capa,
3047                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3048                         /* Use aux roc framework (HS20) */
3049                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3050                                                        vif, duration);
3051                         goto out_unlock;
3052                 }
3053                 IWL_ERR(mvm, "hotspot not supported\n");
3054                 ret = -EINVAL;
3055                 goto out_unlock;
3056         case NL80211_IFTYPE_P2P_DEVICE:
3057                 /* handle below */
3058                 break;
3059         default:
3060                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3061                 ret = -EINVAL;
3062                 goto out_unlock;
3063         }
3064
3065         for (i = 0; i < NUM_PHY_CTX; i++) {
3066                 phy_ctxt = &mvm->phy_ctxts[i];
3067                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3068                         continue;
3069
3070                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3071                         /*
3072                          * Unbind the P2P_DEVICE from the current PHY context,
3073                          * and if the PHY context is not used remove it.
3074                          */
3075                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3076                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3077                                 goto out_unlock;
3078
3079                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3080
3081                         /* Bind the P2P_DEVICE to the current PHY Context */
3082                         mvmvif->phy_ctxt = phy_ctxt;
3083
3084                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3085                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3086                                 goto out_unlock;
3087
3088                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3089                         goto schedule_time_event;
3090                 }
3091         }
3092
3093         /* Need to update the PHY context only if the ROC channel changed */
3094         if (channel == mvmvif->phy_ctxt->channel)
3095                 goto schedule_time_event;
3096
3097         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3098
3099         /*
3100          * Change the PHY context configuration as it is currently referenced
3101          * only by the P2P Device MAC
3102          */
3103         if (mvmvif->phy_ctxt->ref == 1) {
3104                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3105                                                &chandef, 1, 1);
3106                 if (ret)
3107                         goto out_unlock;
3108         } else {
3109                 /*
3110                  * The PHY context is shared with other MACs. Need to remove the
3111                  * P2P Device from the binding, allocate an new PHY context and
3112                  * create a new binding
3113                  */
3114                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3115                 if (!phy_ctxt) {
3116                         ret = -ENOSPC;
3117                         goto out_unlock;
3118                 }
3119
3120                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3121                                                1, 1);
3122                 if (ret) {
3123                         IWL_ERR(mvm, "Failed to change PHY context\n");
3124                         goto out_unlock;
3125                 }
3126
3127                 /* Unbind the P2P_DEVICE from the current PHY context */
3128                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3129                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3130                         goto out_unlock;
3131
3132                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3133
3134                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3135                 mvmvif->phy_ctxt = phy_ctxt;
3136
3137                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3138                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3139                         goto out_unlock;
3140
3141                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3142         }
3143
3144 schedule_time_event:
3145         /* Schedule the time events */
3146         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3147
3148 out_unlock:
3149         mutex_unlock(&mvm->mutex);
3150         IWL_DEBUG_MAC80211(mvm, "leave\n");
3151         return ret;
3152 }
3153
3154 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3155 {
3156         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3157
3158         IWL_DEBUG_MAC80211(mvm, "enter\n");
3159
3160         mutex_lock(&mvm->mutex);
3161         iwl_mvm_stop_roc(mvm);
3162         mutex_unlock(&mvm->mutex);
3163
3164         IWL_DEBUG_MAC80211(mvm, "leave\n");
3165         return 0;
3166 }
3167
3168 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3169                                  struct ieee80211_chanctx_conf *ctx)
3170 {
3171         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3172         struct iwl_mvm_phy_ctxt *phy_ctxt;
3173         int ret;
3174
3175         lockdep_assert_held(&mvm->mutex);
3176
3177         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3178
3179         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3180         if (!phy_ctxt) {
3181                 ret = -ENOSPC;
3182                 goto out;
3183         }
3184
3185         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3186                                        ctx->rx_chains_static,
3187                                        ctx->rx_chains_dynamic);
3188         if (ret) {
3189                 IWL_ERR(mvm, "Failed to add PHY context\n");
3190                 goto out;
3191         }
3192
3193         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3194         *phy_ctxt_id = phy_ctxt->id;
3195 out:
3196         return ret;
3197 }
3198
3199 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3200                                struct ieee80211_chanctx_conf *ctx)
3201 {
3202         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3203         int ret;
3204
3205         mutex_lock(&mvm->mutex);
3206         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3207         mutex_unlock(&mvm->mutex);
3208
3209         return ret;
3210 }
3211
3212 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3213                                      struct ieee80211_chanctx_conf *ctx)
3214 {
3215         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3216         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3217
3218         lockdep_assert_held(&mvm->mutex);
3219
3220         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3221 }
3222
3223 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3224                                    struct ieee80211_chanctx_conf *ctx)
3225 {
3226         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3227
3228         mutex_lock(&mvm->mutex);
3229         __iwl_mvm_remove_chanctx(mvm, ctx);
3230         mutex_unlock(&mvm->mutex);
3231 }
3232
3233 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3234                                    struct ieee80211_chanctx_conf *ctx,
3235                                    u32 changed)
3236 {
3237         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3238         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3239         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3240
3241         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3242                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3243                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3244                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3245                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3246                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3247                       phy_ctxt->ref, changed))
3248                 return;
3249
3250         mutex_lock(&mvm->mutex);
3251         iwl_mvm_bt_coex_vif_change(mvm);
3252         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3253                                  ctx->rx_chains_static,
3254                                  ctx->rx_chains_dynamic);
3255         mutex_unlock(&mvm->mutex);
3256 }
3257
3258 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3259                                         struct ieee80211_vif *vif,
3260                                         struct ieee80211_chanctx_conf *ctx,
3261                                         bool switching_chanctx)
3262 {
3263         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3264         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3265         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3266         int ret;
3267
3268         lockdep_assert_held(&mvm->mutex);
3269
3270         mvmvif->phy_ctxt = phy_ctxt;
3271
3272         switch (vif->type) {
3273         case NL80211_IFTYPE_AP:
3274                 /* only needed if we're switching chanctx (i.e. during CSA) */
3275                 if (switching_chanctx) {
3276                         mvmvif->ap_ibss_active = true;
3277                         break;
3278                 }
3279         case NL80211_IFTYPE_ADHOC:
3280                 /*
3281                  * The AP binding flow is handled as part of the start_ap flow
3282                  * (in bss_info_changed), similarly for IBSS.
3283                  */
3284                 ret = 0;
3285                 goto out;
3286         case NL80211_IFTYPE_STATION:
3287                 break;
3288         case NL80211_IFTYPE_MONITOR:
3289                 /* always disable PS when a monitor interface is active */
3290                 mvmvif->ps_disabled = true;
3291                 break;
3292         default:
3293                 ret = -EINVAL;
3294                 goto out;
3295         }
3296
3297         ret = iwl_mvm_binding_add_vif(mvm, vif);
3298         if (ret)
3299                 goto out;
3300
3301         /*
3302          * Power state must be updated before quotas,
3303          * otherwise fw will complain.
3304          */
3305         iwl_mvm_power_update_mac(mvm);
3306
3307         /* Setting the quota at this stage is only required for monitor
3308          * interfaces. For the other types, the bss_info changed flow
3309          * will handle quota settings.
3310          */
3311         if (vif->type == NL80211_IFTYPE_MONITOR) {
3312                 mvmvif->monitor_active = true;
3313                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3314                 if (ret)
3315                         goto out_remove_binding;
3316
3317                 ret = iwl_mvm_add_snif_sta(mvm, vif);
3318                 if (ret)
3319                         goto out_remove_binding;
3320
3321         }
3322
3323         /* Handle binding during CSA */
3324         if (vif->type == NL80211_IFTYPE_AP) {
3325                 iwl_mvm_update_quotas(mvm, false, NULL);
3326                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3327         }
3328
3329         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3330                 u32 duration = 2 * vif->bss_conf.beacon_int;
3331
3332                 /* iwl_mvm_protect_session() reads directly from the
3333                  * device (the system time), so make sure it is
3334                  * available.
3335                  */
3336                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3337                 if (ret)
3338                         goto out_remove_binding;
3339
3340                 /* Protect the session to make sure we hear the first
3341                  * beacon on the new channel.
3342                  */
3343                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3344                                         vif->bss_conf.beacon_int / 2,
3345                                         true);
3346
3347                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3348
3349                 iwl_mvm_update_quotas(mvm, false, NULL);
3350         }
3351
3352         goto out;
3353
3354 out_remove_binding:
3355         iwl_mvm_binding_remove_vif(mvm, vif);
3356         iwl_mvm_power_update_mac(mvm);
3357 out:
3358         if (ret)
3359                 mvmvif->phy_ctxt = NULL;
3360         return ret;
3361 }
3362 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3363                                       struct ieee80211_vif *vif,
3364                                       struct ieee80211_chanctx_conf *ctx)
3365 {
3366         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3367         int ret;
3368
3369         mutex_lock(&mvm->mutex);
3370         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3371         mutex_unlock(&mvm->mutex);
3372
3373         return ret;
3374 }
3375
3376 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3377                                            struct ieee80211_vif *vif,
3378                                            struct ieee80211_chanctx_conf *ctx,
3379                                            bool switching_chanctx)
3380 {
3381         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3382         struct ieee80211_vif *disabled_vif = NULL;
3383
3384         lockdep_assert_held(&mvm->mutex);
3385
3386         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3387
3388         switch (vif->type) {
3389         case NL80211_IFTYPE_ADHOC:
3390                 goto out;
3391         case NL80211_IFTYPE_MONITOR:
3392                 mvmvif->monitor_active = false;
3393                 mvmvif->ps_disabled = false;
3394                 iwl_mvm_rm_snif_sta(mvm, vif);
3395                 break;
3396         case NL80211_IFTYPE_AP:
3397                 /* This part is triggered only during CSA */
3398                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3399                         goto out;
3400
3401                 mvmvif->csa_countdown = false;
3402
3403                 /* Set CS bit on all the stations */
3404                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3405
3406                 /* Save blocked iface, the timeout is set on the next beacon */
3407                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3408
3409                 mvmvif->ap_ibss_active = false;
3410                 break;
3411         case NL80211_IFTYPE_STATION:
3412                 if (!switching_chanctx)
3413                         break;
3414
3415                 disabled_vif = vif;
3416
3417                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3418                 break;
3419         default:
3420                 break;
3421         }
3422
3423         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3424         iwl_mvm_binding_remove_vif(mvm, vif);
3425
3426 out:
3427         mvmvif->phy_ctxt = NULL;
3428         iwl_mvm_power_update_mac(mvm);
3429 }
3430
3431 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3432                                          struct ieee80211_vif *vif,
3433                                          struct ieee80211_chanctx_conf *ctx)
3434 {
3435         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3436
3437         mutex_lock(&mvm->mutex);
3438         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3439         mutex_unlock(&mvm->mutex);
3440 }
3441
3442 static int
3443 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3444                                 struct ieee80211_vif_chanctx_switch *vifs)
3445 {
3446         int ret;
3447
3448         mutex_lock(&mvm->mutex);
3449         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3450         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3451
3452         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3453         if (ret) {
3454                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3455                 goto out_reassign;
3456         }
3457
3458         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3459                                            true);
3460         if (ret) {
3461                 IWL_ERR(mvm,
3462                         "failed to assign new_ctx during channel switch\n");
3463                 goto out_remove;
3464         }
3465
3466         /* we don't support TDLS during DCM - can be caused by channel switch */
3467         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3468                 iwl_mvm_teardown_tdls_peers(mvm);
3469
3470         goto out;
3471
3472 out_remove:
3473         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3474
3475 out_reassign:
3476         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3477                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3478                 goto out_restart;
3479         }
3480
3481         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3482                                          true)) {
3483                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3484                 goto out_restart;
3485         }
3486
3487         goto out;
3488
3489 out_restart:
3490         /* things keep failing, better restart the hw */
3491         iwl_mvm_nic_restart(mvm, false);
3492
3493 out:
3494         mutex_unlock(&mvm->mutex);
3495
3496         return ret;
3497 }
3498
3499 static int
3500 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3501                                     struct ieee80211_vif_chanctx_switch *vifs)
3502 {
3503         int ret;
3504
3505         mutex_lock(&mvm->mutex);
3506         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3507
3508         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3509                                            true);
3510         if (ret) {
3511                 IWL_ERR(mvm,
3512                         "failed to assign new_ctx during channel switch\n");
3513                 goto out_reassign;
3514         }
3515
3516         goto out;
3517
3518 out_reassign:
3519         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3520                                          true)) {
3521                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3522                 goto out_restart;
3523         }
3524
3525         goto out;
3526
3527 out_restart:
3528         /* things keep failing, better restart the hw */
3529         iwl_mvm_nic_restart(mvm, false);
3530
3531 out:
3532         mutex_unlock(&mvm->mutex);
3533
3534         return ret;
3535 }
3536
3537 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3538                                       struct ieee80211_vif_chanctx_switch *vifs,
3539                                       int n_vifs,
3540                                       enum ieee80211_chanctx_switch_mode mode)
3541 {
3542         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3543         int ret;
3544
3545         /* we only support a single-vif right now */
3546         if (n_vifs > 1)
3547                 return -EOPNOTSUPP;
3548
3549         switch (mode) {
3550         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3551                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3552                 break;
3553         case CHANCTX_SWMODE_REASSIGN_VIF:
3554                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3555                 break;
3556         default:
3557                 ret = -EOPNOTSUPP;
3558                 break;
3559         }
3560
3561         return ret;
3562 }
3563
3564 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3565                            struct ieee80211_sta *sta,
3566                            bool set)
3567 {
3568         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3569         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3570
3571         if (!mvm_sta || !mvm_sta->vif) {
3572                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3573                 return -EINVAL;
3574         }
3575
3576         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3577 }
3578
3579 #ifdef CONFIG_NL80211_TESTMODE
3580 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3581         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3582         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3583         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3584 };
3585
3586 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3587                                       struct ieee80211_vif *vif,
3588                                       void *data, int len)
3589 {
3590         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3591         int err;
3592         u32 noa_duration;
3593
3594         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3595         if (err)
3596                 return err;
3597
3598         if (!tb[IWL_MVM_TM_ATTR_CMD])
3599                 return -EINVAL;
3600
3601         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3602         case IWL_MVM_TM_CMD_SET_NOA:
3603                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3604                     !vif->bss_conf.enable_beacon ||
3605                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3606                         return -EINVAL;
3607
3608                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3609                 if (noa_duration >= vif->bss_conf.beacon_int)
3610                         return -EINVAL;
3611
3612                 mvm->noa_duration = noa_duration;
3613                 mvm->noa_vif = vif;
3614
3615                 return iwl_mvm_update_quotas(mvm, false, NULL);
3616         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3617                 /* must be associated client vif - ignore authorized */
3618                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3619                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3620                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3621                         return -EINVAL;
3622
3623                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3624                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3625                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3626         }
3627
3628         return -EOPNOTSUPP;
3629 }
3630
3631 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3632                                     struct ieee80211_vif *vif,
3633                                     void *data, int len)
3634 {
3635         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3636         int err;
3637
3638         mutex_lock(&mvm->mutex);
3639         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3640         mutex_unlock(&mvm->mutex);
3641
3642         return err;
3643 }
3644 #endif
3645
3646 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3647                                    struct ieee80211_vif *vif,
3648                                    struct ieee80211_channel_switch *chsw)
3649 {
3650         /* By implementing this operation, we prevent mac80211 from
3651          * starting its own channel switch timer, so that we can call
3652          * ieee80211_chswitch_done() ourselves at the right time
3653          * (which is when the absence time event starts).
3654          */
3655
3656         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3657                            "dummy channel switch op\n");
3658 }
3659
3660 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3661                                       struct ieee80211_vif *vif,
3662                                       struct ieee80211_channel_switch *chsw)
3663 {
3664         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3665         struct ieee80211_vif *csa_vif;
3666         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3667         u32 apply_time;
3668         int ret;
3669
3670         mutex_lock(&mvm->mutex);
3671
3672         mvmvif->csa_failed = false;
3673
3674         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3675                            chsw->chandef.center_freq1);
3676
3677         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3678
3679         switch (vif->type) {
3680         case NL80211_IFTYPE_AP:
3681                 csa_vif =
3682                         rcu_dereference_protected(mvm->csa_vif,
3683                                                   lockdep_is_held(&mvm->mutex));
3684                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3685                               "Another CSA is already in progress")) {
3686                         ret = -EBUSY;
3687                         goto out_unlock;
3688                 }
3689
3690                 rcu_assign_pointer(mvm->csa_vif, vif);
3691
3692                 if (WARN_ONCE(mvmvif->csa_countdown,
3693                               "Previous CSA countdown didn't complete")) {
3694                         ret = -EBUSY;
3695                         goto out_unlock;
3696                 }
3697
3698                 break;
3699         case NL80211_IFTYPE_STATION:
3700                 if (mvmvif->lqm_active)
3701                         iwl_mvm_send_lqm_cmd(vif,
3702                                              LQM_CMD_OPERATION_STOP_MEASUREMENT,
3703                                              0, 0);
3704
3705                 /* Schedule the time event to a bit before beacon 1,
3706                  * to make sure we're in the new channel when the
3707                  * GO/AP arrives.
3708                  */
3709                 apply_time = chsw->device_timestamp +
3710                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3711                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3712
3713                 if (chsw->block_tx)
3714                         iwl_mvm_csa_client_absent(mvm, vif);
3715
3716                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3717                                             apply_time);
3718                 if (mvmvif->bf_data.bf_enabled) {
3719                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3720                         if (ret)
3721                                 goto out_unlock;
3722                 }
3723
3724                 break;
3725         default:
3726                 break;
3727         }
3728
3729         mvmvif->ps_disabled = true;
3730
3731         ret = iwl_mvm_power_update_ps(mvm);
3732         if (ret)
3733                 goto out_unlock;
3734
3735         /* we won't be on this channel any longer */
3736         iwl_mvm_teardown_tdls_peers(mvm);
3737
3738 out_unlock:
3739         mutex_unlock(&mvm->mutex);
3740
3741         return ret;
3742 }
3743
3744 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3745                                        struct ieee80211_vif *vif)
3746 {
3747         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3748         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3749         int ret;
3750
3751         mutex_lock(&mvm->mutex);
3752
3753         if (mvmvif->csa_failed) {
3754                 mvmvif->csa_failed = false;
3755                 ret = -EIO;
3756                 goto out_unlock;
3757         }
3758
3759         if (vif->type == NL80211_IFTYPE_STATION) {
3760                 struct iwl_mvm_sta *mvmsta;
3761
3762                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3763                                                           mvmvif->ap_sta_id);
3764
3765                 if (WARN_ON(!mvmsta)) {
3766                         ret = -EIO;
3767                         goto out_unlock;
3768                 }
3769
3770                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3771
3772                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3773
3774                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3775                 if (ret)
3776                         goto out_unlock;
3777
3778                 iwl_mvm_stop_session_protection(mvm, vif);
3779         }
3780
3781         mvmvif->ps_disabled = false;
3782
3783         ret = iwl_mvm_power_update_ps(mvm);
3784
3785 out_unlock:
3786         mutex_unlock(&mvm->mutex);
3787
3788         return ret;
3789 }
3790
3791 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3792                               struct ieee80211_vif *vif, u32 queues, bool drop)
3793 {
3794         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3795         struct iwl_mvm_vif *mvmvif;
3796         struct iwl_mvm_sta *mvmsta;
3797         struct ieee80211_sta *sta;
3798         int i;
3799         u32 msk = 0;
3800
3801         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3802                 return;
3803
3804         /* Make sure we're done with the deferred traffic before flushing */
3805         if (iwl_mvm_is_dqa_supported(mvm))
3806                 flush_work(&mvm->add_stream_wk);
3807
3808         mutex_lock(&mvm->mutex);
3809         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3810
3811         /* flush the AP-station and all TDLS peers */
3812         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3813                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3814                                                 lockdep_is_held(&mvm->mutex));
3815                 if (IS_ERR_OR_NULL(sta))
3816                         continue;
3817
3818                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3819                 if (mvmsta->vif != vif)
3820                         continue;
3821
3822                 /* make sure only TDLS peers or the AP are flushed */
3823                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3824
3825                 msk |= mvmsta->tfd_queue_msk;
3826         }
3827
3828         if (drop) {
3829                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3830                         IWL_ERR(mvm, "flush request fail\n");
3831                 mutex_unlock(&mvm->mutex);
3832         } else {
3833                 mutex_unlock(&mvm->mutex);
3834
3835                 /* this can take a while, and we may need/want other operations
3836                  * to succeed while doing this, so do it without the mutex held
3837                  */
3838                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3839         }
3840 }
3841
3842 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3843                                   struct survey_info *survey)
3844 {
3845         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3846         int ret;
3847
3848         memset(survey, 0, sizeof(*survey));
3849
3850         /* only support global statistics right now */
3851         if (idx != 0)
3852                 return -ENOENT;
3853
3854         if (!fw_has_capa(&mvm->fw->ucode_capa,
3855                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3856                 return -ENOENT;
3857
3858         mutex_lock(&mvm->mutex);
3859
3860         if (mvm->ucode_loaded) {
3861                 ret = iwl_mvm_request_statistics(mvm, false);
3862                 if (ret)
3863                         goto out;
3864         }
3865
3866         survey->filled = SURVEY_INFO_TIME |
3867                          SURVEY_INFO_TIME_RX |
3868                          SURVEY_INFO_TIME_TX |
3869                          SURVEY_INFO_TIME_SCAN;
3870         survey->time = mvm->accu_radio_stats.on_time_rf +
3871                        mvm->radio_stats.on_time_rf;
3872         do_div(survey->time, USEC_PER_MSEC);
3873
3874         survey->time_rx = mvm->accu_radio_stats.rx_time +
3875                           mvm->radio_stats.rx_time;
3876         do_div(survey->time_rx, USEC_PER_MSEC);
3877
3878         survey->time_tx = mvm->accu_radio_stats.tx_time +
3879                           mvm->radio_stats.tx_time;
3880         do_div(survey->time_tx, USEC_PER_MSEC);
3881
3882         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3883                             mvm->radio_stats.on_time_scan;
3884         do_div(survey->time_scan, USEC_PER_MSEC);
3885
3886         ret = 0;
3887  out:
3888         mutex_unlock(&mvm->mutex);
3889         return ret;
3890 }
3891
3892 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3893                                        struct ieee80211_vif *vif,
3894                                        struct ieee80211_sta *sta,
3895                                        struct station_info *sinfo)
3896 {
3897         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3898         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3899         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3900
3901         if (!fw_has_capa(&mvm->fw->ucode_capa,
3902                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3903                 return;
3904
3905         /* if beacon filtering isn't on mac80211 does it anyway */
3906         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3907                 return;
3908
3909         if (!vif->bss_conf.assoc)
3910                 return;
3911
3912         mutex_lock(&mvm->mutex);
3913
3914         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3915                 goto unlock;
3916
3917         if (iwl_mvm_request_statistics(mvm, false))
3918                 goto unlock;
3919
3920         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3921                            mvmvif->beacon_stats.accu_num_beacons;
3922         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3923         if (mvmvif->beacon_stats.avg_signal) {
3924                 /* firmware only reports a value after RXing a few beacons */
3925                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3926                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3927         }
3928  unlock:
3929         mutex_unlock(&mvm->mutex);
3930 }
3931
3932 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
3933                                         struct ieee80211_vif *vif,
3934                                         const struct ieee80211_event *event)
3935 {
3936 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3937         do {                                                    \
3938                 if ((_cnt) && --(_cnt))                         \
3939                         break;                                  \
3940                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3941         } while (0)
3942
3943         struct iwl_fw_dbg_trigger_tlv *trig;
3944         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3945
3946         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3947                 return;
3948
3949         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3950         trig_mlme = (void *)trig->data;
3951         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3952                 return;
3953
3954         if (event->u.mlme.data == ASSOC_EVENT) {
3955                 if (event->u.mlme.status == MLME_DENIED)
3956                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3957                                            trig_mlme->stop_assoc_denied,
3958                                            "DENIED ASSOC: reason %d",
3959                                             event->u.mlme.reason);
3960                 else if (event->u.mlme.status == MLME_TIMEOUT)
3961                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3962                                            trig_mlme->stop_assoc_timeout,
3963                                            "ASSOC TIMEOUT");
3964         } else if (event->u.mlme.data == AUTH_EVENT) {
3965                 if (event->u.mlme.status == MLME_DENIED)
3966                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3967                                            trig_mlme->stop_auth_denied,
3968                                            "DENIED AUTH: reason %d",
3969                                            event->u.mlme.reason);
3970                 else if (event->u.mlme.status == MLME_TIMEOUT)
3971                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3972                                            trig_mlme->stop_auth_timeout,
3973                                            "AUTH TIMEOUT");
3974         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
3975                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3976                                    trig_mlme->stop_rx_deauth,
3977                                    "DEAUTH RX %d", event->u.mlme.reason);
3978         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
3979                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3980                                    trig_mlme->stop_tx_deauth,
3981                                    "DEAUTH TX %d", event->u.mlme.reason);
3982         }
3983 #undef CHECK_MLME_TRIGGER
3984 }
3985
3986 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
3987                                           struct ieee80211_vif *vif,
3988                                           const struct ieee80211_event *event)
3989 {
3990         struct iwl_fw_dbg_trigger_tlv *trig;
3991         struct iwl_fw_dbg_trigger_ba *ba_trig;
3992
3993         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
3994                 return;
3995
3996         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
3997         ba_trig = (void *)trig->data;
3998         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3999                 return;
4000
4001         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4002                 return;
4003
4004         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4005                                     "BAR received from %pM, tid %d, ssn %d",
4006                                     event->u.ba.sta->addr, event->u.ba.tid,
4007                                     event->u.ba.ssn);
4008 }
4009
4010 static void
4011 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4012                                      struct ieee80211_vif *vif,
4013                                      const struct ieee80211_event *event)
4014 {
4015         struct iwl_fw_dbg_trigger_tlv *trig;
4016         struct iwl_fw_dbg_trigger_ba *ba_trig;
4017
4018         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4019                 return;
4020
4021         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4022         ba_trig = (void *)trig->data;
4023         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4024                 return;
4025
4026         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4027                 return;
4028
4029         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4030                                     "Frame from %pM timed out, tid %d",
4031                                     event->u.ba.sta->addr, event->u.ba.tid);
4032 }
4033
4034 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4035                                        struct ieee80211_vif *vif,
4036                                        const struct ieee80211_event *event)
4037 {
4038         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4039
4040         switch (event->type) {
4041         case MLME_EVENT:
4042                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4043                 break;
4044         case BAR_RX_EVENT:
4045                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4046                 break;
4047         case BA_FRAME_TIMEOUT:
4048                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4049                 break;
4050         default:
4051                 break;
4052         }
4053 }
4054
4055 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm,
4056                                      struct iwl_mvm_internal_rxq_notif *notif,
4057                                      u32 size)
4058 {
4059         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(notif_waitq);
4060         u32 qmask = BIT(mvm->trans->num_rx_queues) - 1;
4061         int ret;
4062
4063         lockdep_assert_held(&mvm->mutex);
4064
4065         if (!iwl_mvm_has_new_rx_api(mvm))
4066                 return;
4067
4068         notif->cookie = mvm->queue_sync_cookie;
4069
4070         if (notif->sync)
4071                 atomic_set(&mvm->queue_sync_counter,
4072                            mvm->trans->num_rx_queues);
4073
4074         ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size);
4075         if (ret) {
4076                 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret);
4077                 goto out;
4078         }
4079
4080         if (notif->sync)
4081                 ret = wait_event_timeout(notif_waitq,
4082                                          atomic_read(&mvm->queue_sync_counter) == 0,
4083                                          HZ);
4084         WARN_ON_ONCE(!ret);
4085
4086 out:
4087         atomic_set(&mvm->queue_sync_counter, 0);
4088         mvm->queue_sync_cookie++;
4089 }
4090
4091 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw)
4092 {
4093         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4094         struct iwl_mvm_internal_rxq_notif data = {
4095                 .type = IWL_MVM_RXQ_EMPTY,
4096                 .sync = 1,
4097         };
4098
4099         mutex_lock(&mvm->mutex);
4100         iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data));
4101         mutex_unlock(&mvm->mutex);
4102 }
4103
4104 const struct ieee80211_ops iwl_mvm_hw_ops = {
4105         .tx = iwl_mvm_mac_tx,
4106         .ampdu_action = iwl_mvm_mac_ampdu_action,
4107         .start = iwl_mvm_mac_start,
4108         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4109         .stop = iwl_mvm_mac_stop,
4110         .add_interface = iwl_mvm_mac_add_interface,
4111         .remove_interface = iwl_mvm_mac_remove_interface,
4112         .config = iwl_mvm_mac_config,
4113         .prepare_multicast = iwl_mvm_prepare_multicast,
4114         .configure_filter = iwl_mvm_configure_filter,
4115         .config_iface_filter = iwl_mvm_config_iface_filter,
4116         .bss_info_changed = iwl_mvm_bss_info_changed,
4117         .hw_scan = iwl_mvm_mac_hw_scan,
4118         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4119         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4120         .sta_state = iwl_mvm_mac_sta_state,
4121         .sta_notify = iwl_mvm_mac_sta_notify,
4122         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4123         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4124         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4125         .sta_rc_update = iwl_mvm_sta_rc_update,
4126         .conf_tx = iwl_mvm_mac_conf_tx,
4127         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4128         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4129         .flush = iwl_mvm_mac_flush,
4130         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4131         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4132         .set_key = iwl_mvm_mac_set_key,
4133         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4134         .remain_on_channel = iwl_mvm_roc,
4135         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4136         .add_chanctx = iwl_mvm_add_chanctx,
4137         .remove_chanctx = iwl_mvm_remove_chanctx,
4138         .change_chanctx = iwl_mvm_change_chanctx,
4139         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4140         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4141         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4142
4143         .start_ap = iwl_mvm_start_ap_ibss,
4144         .stop_ap = iwl_mvm_stop_ap_ibss,
4145         .join_ibss = iwl_mvm_start_ap_ibss,
4146         .leave_ibss = iwl_mvm_stop_ap_ibss,
4147
4148         .set_tim = iwl_mvm_set_tim,
4149
4150         .channel_switch = iwl_mvm_channel_switch,
4151         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4152         .post_channel_switch = iwl_mvm_post_channel_switch,
4153
4154         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4155         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4156         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4157
4158         .event_callback = iwl_mvm_mac_event_callback,
4159
4160         .sync_rx_queues = iwl_mvm_sync_rx_queues,
4161
4162         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4163
4164 #ifdef CONFIG_PM_SLEEP
4165         /* look at d3.c */
4166         .suspend = iwl_mvm_suspend,
4167         .resume = iwl_mvm_resume,
4168         .set_wakeup = iwl_mvm_set_wakeup,
4169         .set_rekey_data = iwl_mvm_set_rekey_data,
4170 #if IS_ENABLED(CONFIG_IPV6)
4171         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4172 #endif
4173         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4174 #endif
4175         .get_survey = iwl_mvm_mac_get_survey,
4176         .sta_statistics = iwl_mvm_mac_sta_statistics,
4177 };