drivers/net/wireless/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  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <linux/devcoredump.h>
  73 #include <net/mac80211.h>
  74 #include <net/ieee80211_radiotap.h>
  75 #include <net/tcp.h>
  76
  77 #include "iwl-op-mode.h"
  78 #include "iwl-io.h"
  79 #include "mvm.h"
  80 #include "sta.h"
  81 #include "time-event.h"
  82 #include "iwl-eeprom-parse.h"
  83 #include "iwl-phy-db.h"
  84 #include "testmode.h"
  85 #include "iwl-fw-error-dump.h"
  86 #include "iwl-prph.h"
  87 #include "iwl-csr.h"
  88 #include "iwl-nvm-parse.h"
  89
  90 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  91         {
  92                 .max = 1,
  93                 .types = BIT(NL80211_IFTYPE_STATION),
  94         },
  95         {
  96                 .max = 1,
  97                 .types = BIT(NL80211_IFTYPE_AP) |
  98                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  99                         BIT(NL80211_IFTYPE_P2P_GO),
 100         },
 101         {
 102                 .max = 1,
 103                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 104         },
 105 };
 106
 107 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 108         {
 109                 .num_different_channels = 2,
 110                 .max_interfaces = 3,
 111                 .limits = iwl_mvm_limits,
 112                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 113         },
 114 };
 115
 116 #ifdef CONFIG_PM_SLEEP
 117 static const struct nl80211_wowlan_tcp_data_token_feature
 118 iwl_mvm_wowlan_tcp_token_feature = {
 119         .min_len = 0,
 120         .max_len = 255,
 121         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 122 };
 123
 124 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 125         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 126         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 127                             sizeof(struct ethhdr) -
 128                             sizeof(struct iphdr) -
 129                             sizeof(struct tcphdr),
 130         .data_interval_max = 65535, /* __le16 in API */
 131         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 132                             sizeof(struct ethhdr) -
 133                             sizeof(struct iphdr) -
 134                             sizeof(struct tcphdr),
 135         .seq = true,
 136 };
 137 #endif
 138
 139 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 140 /*
 141  * Use the reserved field to indicate magic values.
 142  * these values will only be used internally by the driver,
 143  * and won't make it to the fw (reserved will be 0).
 144  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 145  *      be the vif's ip address. in case there is not a single
 146  *      ip address (0, or more than 1), this attribute will
 147  *      be skipped.
 148  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 149  *      the LSB bytes of the vif's mac address
 150  */
 151 enum {
 152         BC_FILTER_MAGIC_NONE = 0,
 153         BC_FILTER_MAGIC_IP,
 154         BC_FILTER_MAGIC_MAC,
 155 };
 156
 157 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 158         {
 159                 /* arp */
 160                 .discard = 0,
 161                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 162                 .attrs = {
 163                         {
 164                                 /* frame type - arp, hw type - ethernet */
 165                                 .offset_type =
 166                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 167                                 .offset = sizeof(rfc1042_header),
 168                                 .val = cpu_to_be32(0x08060001),
 169                                 .mask = cpu_to_be32(0xffffffff),
 170                         },
 171                         {
 172                                 /* arp dest ip */
 173                                 .offset_type =
 174                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 175                                 .offset = sizeof(rfc1042_header) + 2 +
 176                                           sizeof(struct arphdr) +
 177                                           ETH_ALEN + sizeof(__be32) +
 178                                           ETH_ALEN,
 179                                 .mask = cpu_to_be32(0xffffffff),
 180                                 /* mark it as special field */
 181                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 182                         },
 183                 },
 184         },
 185         {
 186                 /* dhcp offer bcast */
 187                 .discard = 0,
 188                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 189                 .attrs = {
 190                         {
 191                                 /* udp dest port - 68 (bootp client)*/
 192                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 193                                 .offset = offsetof(struct udphdr, dest),
 194                                 .val = cpu_to_be32(0x00440000),
 195                                 .mask = cpu_to_be32(0xffff0000),
 196                         },
 197                         {
 198                                 /* dhcp - lsb bytes of client hw address */
 199                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 200                                 .offset = 38,
 201                                 .mask = cpu_to_be32(0xffffffff),
 202                                 /* mark it as special field */
 203                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 204                         },
 205                 },
 206         },
 207         /* last filter must be empty */
 208         {},
 209 };
 210 #endif
 211
 212 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 213 {
 214         if (!iwl_mvm_is_d0i3_supported(mvm))
 215                 return;
 216
 217         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 218         spin_lock_bh(&mvm->refs_lock);
 219         mvm->refs[ref_type]++;
 220         spin_unlock_bh(&mvm->refs_lock);
 221         iwl_trans_ref(mvm->trans);
 222 }
 223
 224 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 225 {
 226         if (!iwl_mvm_is_d0i3_supported(mvm))
 227                 return;
 228
 229         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 230         spin_lock_bh(&mvm->refs_lock);
 231         WARN_ON(!mvm->refs[ref_type]--);
 232         spin_unlock_bh(&mvm->refs_lock);
 233         iwl_trans_unref(mvm->trans);
 234 }
 235
 236 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 237                                      enum iwl_mvm_ref_type except_ref)
 238 {
 239         int i, j;
 240
 241         if (!iwl_mvm_is_d0i3_supported(mvm))
 242                 return;
 243
 244         spin_lock_bh(&mvm->refs_lock);
 245         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 246                 if (except_ref == i || !mvm->refs[i])
 247                         continue;
 248
 249                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 250                               i, mvm->refs[i]);
 251                 for (j = 0; j < mvm->refs[i]; j++)
 252                         iwl_trans_unref(mvm->trans);
 253                 mvm->refs[i] = 0;
 254         }
 255         spin_unlock_bh(&mvm->refs_lock);
 256 }
 257
 258 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 259 {
 260         int i;
 261         bool taken = false;
 262
 263         if (!iwl_mvm_is_d0i3_supported(mvm))
 264                 return true;
 265
 266         spin_lock_bh(&mvm->refs_lock);
 267         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 268                 if (mvm->refs[i]) {
 269                         taken = true;
 270                         break;
 271                 }
 272         }
 273         spin_unlock_bh(&mvm->refs_lock);
 274
 275         return taken;
 276 }
 277
 278 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 279 {
 280         iwl_mvm_ref(mvm, ref_type);
 281
 282         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 283                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 284                                 HZ)) {
 285                 WARN_ON_ONCE(1);
 286                 iwl_mvm_unref(mvm, ref_type);
 287                 return -EIO;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 294 {
 295         int i;
 296
 297         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 298         for (i = 0; i < NUM_PHY_CTX; i++) {
 299                 mvm->phy_ctxts[i].id = i;
 300                 mvm->phy_ctxts[i].ref = 0;
 301         }
 302 }
 303
 304 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 305                                                   const char *alpha2,
 306                                                   enum iwl_mcc_source src_id,
 307                                                   bool *changed)
 308 {
 309         struct ieee80211_regdomain *regd = NULL;
 310         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 311         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 312         struct iwl_mcc_update_resp *resp;
 313
 314         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 315
 316         lockdep_assert_held(&mvm->mutex);
 317
 318         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 319         if (IS_ERR_OR_NULL(resp)) {
 320                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 321                               PTR_ERR_OR_ZERO(resp));
 322                 goto out;
 323         }
 324
 325         if (changed)
 326                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 327
 328         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 329                                       __le32_to_cpu(resp->n_channels),
 330                                       resp->channels,
 331                                       __le16_to_cpu(resp->mcc));
 332         /* Store the return source id */
 333         src_id = resp->source_id;
 334         kfree(resp);
 335         if (IS_ERR_OR_NULL(regd)) {
 336                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 337                               PTR_ERR_OR_ZERO(regd));
 338                 goto out;
 339         }
 340
 341         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 342                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 343         mvm->lar_regdom_set = true;
 344         mvm->mcc_src = src_id;
 345
 346 out:
 347         return regd;
 348 }
 349
 350 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 351 {
 352         bool changed;
 353         struct ieee80211_regdomain *regd;
 354
 355         if (!iwl_mvm_is_lar_supported(mvm))
 356                 return;
 357
 358         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 359         if (!IS_ERR_OR_NULL(regd)) {
 360                 /* only update the regulatory core if changed */
 361                 if (changed)
 362                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 363
 364                 kfree(regd);
 365         }
 366 }
 367
 368 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 369                                                           bool *changed)
 370 {
 371         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 372                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 373                                      MCC_SOURCE_GET_CURRENT :
 374                                      MCC_SOURCE_OLD_FW, changed);
 375 }
 376
 377 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 378 {
 379         enum iwl_mcc_source used_src;
 380         struct ieee80211_regdomain *regd;
 381         int ret;
 382         bool changed;
 383         const struct ieee80211_regdomain *r =
 384                         rtnl_dereference(mvm->hw->wiphy->regd);
 385
 386         if (!r)
 387                 return -ENOENT;
 388
 389         /* save the last source in case we overwrite it below */
 390         used_src = mvm->mcc_src;
 391         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 392                 /* Notify the firmware we support wifi location updates */
 393                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 394                 if (!IS_ERR_OR_NULL(regd))
 395                         kfree(regd);
 396         }
 397
 398         /* Now set our last stored MCC and source */
 399         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 400                                      &changed);
 401         if (IS_ERR_OR_NULL(regd))
 402                 return -EIO;
 403
 404         /* update cfg80211 if the regdomain was changed */
 405         if (changed)
 406                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 407         else
 408                 ret = 0;
 409
 410         kfree(regd);
 411         return ret;
 412 }
 413
 414 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 415 {
 416         struct ieee80211_hw *hw = mvm->hw;
 417         int num_mac, ret, i;
 418         static const u32 mvm_ciphers[] = {
 419                 WLAN_CIPHER_SUITE_WEP40,
 420                 WLAN_CIPHER_SUITE_WEP104,
 421                 WLAN_CIPHER_SUITE_TKIP,
 422                 WLAN_CIPHER_SUITE_CCMP,
 423         };
 424
 425         /* Tell mac80211 our characteristics */
 426         ieee80211_hw_set(hw, SIGNAL_DBM);
 427         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 428         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 429         ieee80211_hw_set(hw, QUEUE_CONTROL);
 430         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 431         ieee80211_hw_set(hw, SUPPORTS_PS);
 432         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 433         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 434         ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
 435         ieee80211_hw_set(hw, CONNECTION_MONITOR);
 436         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
 437         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 438         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 439
 440         hw->queues = mvm->first_agg_queue;
 441         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 442         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 443                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 444         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 445                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 446         hw->rate_control_algorithm = "iwl-mvm-rs";
 447         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 448         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 449
 450         BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
 451         memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
 452         hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
 453         hw->wiphy->cipher_suites = mvm->ciphers;
 454
 455         /*
 456          * Enable 11w if advertised by firmware and software crypto
 457          * is not enabled (as the firmware will interpret some mgmt
 458          * packets, so enabling it with software crypto isn't safe)
 459          */
 460         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 461             !iwlwifi_mod_params.sw_crypto) {
 462                 ieee80211_hw_set(hw, MFP_CAPABLE);
 463                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 464                         WLAN_CIPHER_SUITE_AES_CMAC;
 465                 hw->wiphy->n_cipher_suites++;
 466         }
 467
 468         /* currently FW API supports only one optional cipher scheme */
 469         if (mvm->fw->cs[0].cipher) {
 470                 mvm->hw->n_cipher_schemes = 1;
 471                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 472                 mvm->ciphers[hw->wiphy->n_cipher_suites] =
 473                         mvm->fw->cs[0].cipher;
 474                 hw->wiphy->n_cipher_suites++;
 475         }
 476
 477         ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
 478         hw->wiphy->features |=
 479                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 480                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
 481                 NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
 482
 483         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 484         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 485         hw->chanctx_data_size = sizeof(u16);
 486
 487         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 488                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 489                 BIT(NL80211_IFTYPE_AP) |
 490                 BIT(NL80211_IFTYPE_P2P_GO) |
 491                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 492                 BIT(NL80211_IFTYPE_ADHOC);
 493
 494         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 495         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 496         if (iwl_mvm_is_lar_supported(mvm))
 497                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 498         else
 499                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 500                                                REGULATORY_DISABLE_BEACON_HINTS;
 501
 502         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 503                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 504
 505         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 506
 507         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 508         hw->wiphy->n_iface_combinations =
 509                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 510
 511         hw->wiphy->max_remain_on_channel_duration = 10000;
 512         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 513         /* we can compensate an offset of up to 3 channels = 15 MHz */
 514         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 515
 516         /* Extract MAC address */
 517         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 518         hw->wiphy->addresses = mvm->addresses;
 519         hw->wiphy->n_addresses = 1;
 520
 521         /* Extract additional MAC addresses if available */
 522         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 523                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 524
 525         for (i = 1; i < num_mac; i++) {
 526                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 527                        ETH_ALEN);
 528                 mvm->addresses[i].addr[5]++;
 529                 hw->wiphy->n_addresses++;
 530         }
 531
 532         iwl_mvm_reset_phy_ctxts(mvm);
 533
 534         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 535
 536         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 537
 538         BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
 539         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 540                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 541
 542         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
 543                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 544         else
 545                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 546
 547         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 548                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 549                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 550         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
 551                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 552                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 553
 554                 if (fw_has_capa(&mvm->fw->ucode_capa,
 555                                 IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 556                     fw_has_api(&mvm->fw->ucode_capa,
 557                                IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 558                         hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
 559                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 560         }
 561
 562         hw->wiphy->hw_version = mvm->trans->hw_id;
 563
 564         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 565                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 566         else
 567                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 568
 569         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 570         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 571         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 572         /* we create the 802.11 header and zero length SSID IE. */
 573         hw->wiphy->max_sched_scan_ie_len =
 574                 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 575
 576         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 577                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 578                                NL80211_FEATURE_P2P_GO_OPPPS |
 579                                NL80211_FEATURE_DYNAMIC_SMPS |
 580                                NL80211_FEATURE_STATIC_SMPS |
 581                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 582
 583         if (fw_has_capa(&mvm->fw->ucode_capa,
 584                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 585                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 586         if (fw_has_capa(&mvm->fw->ucode_capa,
 587                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 588                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 589
 590         if (fw_has_capa(&mvm->fw->ucode_capa,
 591                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 592                 hw->wiphy->features |=
 593                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 594
 595         if (fw_has_capa(&mvm->fw->ucode_capa,
 596                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 597                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 598
 599         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 600
 601 #ifdef CONFIG_PM_SLEEP
 602         if (iwl_mvm_is_d0i3_supported(mvm) &&
 603             device_can_wakeup(mvm->trans->dev)) {
 604                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 605                 hw->wiphy->wowlan = &mvm->wowlan;
 606         }
 607
 608         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 609             mvm->trans->ops->d3_suspend &&
 610             mvm->trans->ops->d3_resume &&
 611             device_can_wakeup(mvm->trans->dev)) {
 612                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 613                                      WIPHY_WOWLAN_DISCONNECT |
 614                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 615                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 616                                      WIPHY_WOWLAN_NET_DETECT;
 617                 if (!iwlwifi_mod_params.sw_crypto)
 618                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 619                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 620                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 621
 622                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 623                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 624                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 625                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 626                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 627                 hw->wiphy->wowlan = &mvm->wowlan;
 628         }
 629 #endif
 630
 631 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 632         /* assign default bcast filtering configuration */
 633         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 634 #endif
 635
 636         ret = iwl_mvm_leds_init(mvm);
 637         if (ret)
 638                 return ret;
 639
 640         if (fw_has_capa(&mvm->fw->ucode_capa,
 641                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 642                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 643                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 644                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 645         }
 646
 647         if (fw_has_capa(&mvm->fw->ucode_capa,
 648                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 649                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 650                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 651         }
 652
 653         hw->netdev_features |= mvm->cfg->features;
 654         if (!iwl_mvm_is_csum_supported(mvm))
 655                 hw->netdev_features &= ~NETIF_F_RXCSUM;
 656
 657         ret = ieee80211_register_hw(mvm->hw);
 658         if (ret)
 659                 iwl_mvm_leds_exit(mvm);
 660
 661         return ret;
 662 }
 663
 664 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 665                              struct ieee80211_sta *sta,
 666                              struct sk_buff *skb)
 667 {
 668         struct iwl_mvm_sta *mvmsta;
 669         bool defer = false;
 670
 671         /*
 672          * double check the IN_D0I3 flag both before and after
 673          * taking the spinlock, in order to prevent taking
 674          * the spinlock when not needed.
 675          */
 676         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 677                 return false;
 678
 679         spin_lock(&mvm->d0i3_tx_lock);
 680         /*
 681          * testing the flag again ensures the skb dequeue
 682          * loop (on d0i3 exit) hasn't run yet.
 683          */
 684         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 685                 goto out;
 686
 687         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 688         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 689             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 690                 goto out;
 691
 692         __skb_queue_tail(&mvm->d0i3_tx, skb);
 693         ieee80211_stop_queues(mvm->hw);
 694
 695         /* trigger wakeup */
 696         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 697         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 698
 699         defer = true;
 700 out:
 701         spin_unlock(&mvm->d0i3_tx_lock);
 702         return defer;
 703 }
 704
 705 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 706                            struct ieee80211_tx_control *control,
 707                            struct sk_buff *skb)
 708 {
 709         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 710         struct ieee80211_sta *sta = control->sta;
 711         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 712         struct ieee80211_hdr *hdr = (void *)skb->data;
 713
 714         if (iwl_mvm_is_radio_killed(mvm)) {
 715                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 716                 goto drop;
 717         }
 718
 719         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 720             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 721             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 722                 goto drop;
 723
 724         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 725         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 726                      ieee80211_is_mgmt(hdr->frame_control) &&
 727                      !ieee80211_is_deauth(hdr->frame_control) &&
 728                      !ieee80211_is_disassoc(hdr->frame_control) &&
 729                      !ieee80211_is_action(hdr->frame_control)))
 730                 sta = NULL;
 731
 732         if (sta) {
 733                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 734                         return;
 735                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 736                         goto drop;
 737                 return;
 738         }
 739
 740         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 741                 goto drop;
 742         return;
 743  drop:
 744         ieee80211_free_txskb(hw, skb);
 745 }
 746
 747 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 748 {
 749         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 750                 return false;
 751         return true;
 752 }
 753
 754 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 755 {
 756         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 757                 return false;
 758         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 759                 return true;
 760
 761         /* enabled by default */
 762         return true;
 763 }
 764
 765 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 766         do {                                                    \
 767                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 768                         break;                                  \
 769                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 770         } while (0)
 771
 772 static void
 773 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 774                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 775                             enum ieee80211_ampdu_mlme_action action)
 776 {
 777         struct iwl_fw_dbg_trigger_tlv *trig;
 778         struct iwl_fw_dbg_trigger_ba *ba_trig;
 779
 780         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 781                 return;
 782
 783         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 784         ba_trig = (void *)trig->data;
 785
 786         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 787                 return;
 788
 789         switch (action) {
 790         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 791                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 792                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 793
 794                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 795                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 796                                  sta->addr, tid, tid_data->ssn);
 797                 break;
 798                 }
 799         case IEEE80211_AMPDU_TX_STOP_CONT:
 800                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 801                                  "TX AGG STOP: MAC %pM tid %d\n",
 802                                  sta->addr, tid);
 803                 break;
 804         case IEEE80211_AMPDU_RX_START:
 805                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 806                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 807                                  sta->addr, tid, rx_ba_ssn);
 808                 break;
 809         case IEEE80211_AMPDU_RX_STOP:
 810                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 811                                  "RX AGG STOP: MAC %pM tid %d\n",
 812                                  sta->addr, tid);
 813                 break;
 814         default:
 815                 break;
 816         }
 817 }
 818
 819 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 820                                     struct ieee80211_vif *vif,
 821                                     enum ieee80211_ampdu_mlme_action action,
 822                                     struct ieee80211_sta *sta, u16 tid,
 823                                     u16 *ssn, u8 buf_size, bool amsdu)
 824 {
 825         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 826         int ret;
 827         bool tx_agg_ref = false;
 828
 829         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 830                      sta->addr, tid, action);
 831
 832         if (!(mvm->nvm_data->sku_cap_11n_enable))
 833                 return -EACCES;
 834
 835         /* return from D0i3 before starting a new Tx aggregation */
 836         switch (action) {
 837         case IEEE80211_AMPDU_TX_START:
 838         case IEEE80211_AMPDU_TX_STOP_CONT:
 839         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 840         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 841         case IEEE80211_AMPDU_TX_OPERATIONAL:
 842                 /*
 843                  * for tx start, wait synchronously until D0i3 exit to
 844                  * get the correct sequence number for the tid.
 845                  * additionally, some other ampdu actions use direct
 846                  * target access, which is not handled automatically
 847                  * by the trans layer (unlike commands), so wait for
 848                  * d0i3 exit in these cases as well.
 849                  */
 850                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 851                 if (ret)
 852                         return ret;
 853
 854                 tx_agg_ref = true;
 855                 break;
 856         default:
 857                 break;
 858         }
 859
 860         mutex_lock(&mvm->mutex);
 861
 862         switch (action) {
 863         case IEEE80211_AMPDU_RX_START:
 864                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 865                         ret = -EINVAL;
 866                         break;
 867                 }
 868                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 869                 break;
 870         case IEEE80211_AMPDU_RX_STOP:
 871                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 872                 break;
 873         case IEEE80211_AMPDU_TX_START:
 874                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 875                         ret = -EINVAL;
 876                         break;
 877                 }
 878                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 879                 break;
 880         case IEEE80211_AMPDU_TX_STOP_CONT:
 881                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 882                 break;
 883         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 884         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 885                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 886                 break;
 887         case IEEE80211_AMPDU_TX_OPERATIONAL:
 888                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 889                 break;
 890         default:
 891                 WARN_ON_ONCE(1);
 892                 ret = -EINVAL;
 893                 break;
 894         }
 895
 896         if (!ret) {
 897                 u16 rx_ba_ssn = 0;
 898
 899                 if (action == IEEE80211_AMPDU_RX_START)
 900                         rx_ba_ssn = *ssn;
 901
 902                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 903                                             rx_ba_ssn, action);
 904         }
 905         mutex_unlock(&mvm->mutex);
 906
 907         /*
 908          * If the tid is marked as started, we won't use it for offloaded
 909          * traffic on the next D0i3 entry. It's safe to unref.
 910          */
 911         if (tx_agg_ref)
 912                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 913
 914         return ret;
 915 }
 916
 917 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 918                                      struct ieee80211_vif *vif)
 919 {
 920         struct iwl_mvm *mvm = data;
 921         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 922
 923         mvmvif->uploaded = false;
 924         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 925
 926         spin_lock_bh(&mvm->time_event_lock);
 927         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 928         spin_unlock_bh(&mvm->time_event_lock);
 929
 930         mvmvif->phy_ctxt = NULL;
 931         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 932 }
 933
 934 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 935                                      const void *data, size_t datalen)
 936 {
 937         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 938         ssize_t bytes_read;
 939         ssize_t bytes_read_trans;
 940
 941         if (offset < dump_ptrs->op_mode_len) {
 942                 bytes_read = min_t(ssize_t, count,
 943                                    dump_ptrs->op_mode_len - offset);
 944                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 945                        bytes_read);
 946                 offset += bytes_read;
 947                 count -= bytes_read;
 948
 949                 if (count == 0)
 950                         return bytes_read;
 951         } else {
 952                 bytes_read = 0;
 953         }
 954
 955         if (!dump_ptrs->trans_ptr)
 956                 return bytes_read;
 957
 958         offset -= dump_ptrs->op_mode_len;
 959         bytes_read_trans = min_t(ssize_t, count,
 960                                  dump_ptrs->trans_ptr->len - offset);
 961         memcpy(buffer + bytes_read,
 962                (u8 *)dump_ptrs->trans_ptr->data + offset,
 963                bytes_read_trans);
 964
 965         return bytes_read + bytes_read_trans;
 966 }
 967
 968 static void iwl_mvm_free_coredump(const void *data)
 969 {
 970         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 971
 972         vfree(fw_error_dump->op_mode_ptr);
 973         vfree(fw_error_dump->trans_ptr);
 974         kfree(fw_error_dump);
 975 }
 976
 977 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 978                                struct iwl_fw_error_dump_data **dump_data)
 979 {
 980         struct iwl_fw_error_dump_fifo *fifo_hdr;
 981         u32 *fifo_data;
 982         u32 fifo_len;
 983         unsigned long flags;
 984         int i, j;
 985
 986         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 987                 return;
 988
 989         /* Pull RXF data from all RXFs */
 990         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
 991                 /*
 992                  * Keep aside the additional offset that might be needed for
 993                  * next RXF
 994                  */
 995                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
 996
 997                 fifo_hdr = (void *)(*dump_data)->data;
 998                 fifo_data = (void *)fifo_hdr->data;
 999                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
1000
1001                 /* No need to try to read the data if the length is 0 */
1002                 if (fifo_len == 0)
1003                         continue;
1004
1005                 /* Add a TLV for the RXF */
1006                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
1007                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1008
1009                 fifo_hdr->fifo_num = cpu_to_le32(i);
1010                 fifo_hdr->available_bytes =
1011                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1012                                                         RXF_RD_D_SPACE +
1013                                                         offset_diff));
1014                 fifo_hdr->wr_ptr =
1015                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1016                                                         RXF_RD_WR_PTR +
1017                                                         offset_diff));
1018                 fifo_hdr->rd_ptr =
1019                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1020                                                         RXF_RD_RD_PTR +
1021                                                         offset_diff));
1022                 fifo_hdr->fence_ptr =
1023                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1024                                                         RXF_RD_FENCE_PTR +
1025                                                         offset_diff));
1026                 fifo_hdr->fence_mode =
1027                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1028                                                         RXF_SET_FENCE_MODE +
1029                                                         offset_diff));
1030
1031                 /* Lock fence */
1032                 iwl_trans_write_prph(mvm->trans,
1033                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
1034                 /* Set fence pointer to the same place like WR pointer */
1035                 iwl_trans_write_prph(mvm->trans,
1036                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
1037                 /* Set fence offset */
1038                 iwl_trans_write_prph(mvm->trans,
1039                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
1040                                      0x0);
1041
1042                 /* Read FIFO */
1043                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1044                 for (j = 0; j < fifo_len; j++)
1045                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1046                                                          RXF_FIFO_RD_FENCE_INC +
1047                                                          offset_diff);
1048                 *dump_data = iwl_fw_error_next_data(*dump_data);
1049         }
1050
1051         /* Pull TXF data from all TXFs */
1052         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
1053                 /* Mark the number of TXF we're pulling now */
1054                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
1055
1056                 fifo_hdr = (void *)(*dump_data)->data;
1057                 fifo_data = (void *)fifo_hdr->data;
1058                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
1059
1060                 /* No need to try to read the data if the length is 0 */
1061                 if (fifo_len == 0)
1062                         continue;
1063
1064                 /* Add a TLV for the FIFO */
1065                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
1066                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1067
1068                 fifo_hdr->fifo_num = cpu_to_le32(i);
1069                 fifo_hdr->available_bytes =
1070                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1071                                                         TXF_FIFO_ITEM_CNT));
1072                 fifo_hdr->wr_ptr =
1073                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1074                                                         TXF_WR_PTR));
1075                 fifo_hdr->rd_ptr =
1076                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1077                                                         TXF_RD_PTR));
1078                 fifo_hdr->fence_ptr =
1079                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1080                                                         TXF_FENCE_PTR));
1081                 fifo_hdr->fence_mode =
1082                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1083                                                         TXF_LOCK_FENCE));
1084
1085                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
1086                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
1087                                      TXF_WR_PTR);
1088
1089                 /* Dummy-read to advance the read pointer to the head */
1090                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
1091
1092                 /* Read FIFO */
1093                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1094                 for (j = 0; j < fifo_len; j++)
1095                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1096                                                           TXF_READ_MODIFY_DATA);
1097                 *dump_data = iwl_fw_error_next_data(*dump_data);
1098         }
1099
1100         iwl_trans_release_nic_access(mvm->trans, &flags);
1101 }
1102
1103 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1104 {
1105         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1106             !mvm->fw_dump_desc)
1107                 return;
1108
1109         kfree(mvm->fw_dump_desc);
1110         mvm->fw_dump_desc = NULL;
1111 }
1112
1113 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1114 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1115
1116 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1117 {
1118         struct iwl_fw_error_dump_file *dump_file;
1119         struct iwl_fw_error_dump_data *dump_data;
1120         struct iwl_fw_error_dump_info *dump_info;
1121         struct iwl_fw_error_dump_mem *dump_mem;
1122         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1123         struct iwl_mvm_dump_ptrs *fw_error_dump;
1124         u32 sram_len, sram_ofs;
1125         u32 file_len, fifo_data_len = 0;
1126         u32 smem_len = mvm->cfg->smem_len;
1127         u32 sram2_len = mvm->cfg->dccm2_len;
1128         bool monitor_dump_only = false;
1129
1130         lockdep_assert_held(&mvm->mutex);
1131
1132         if (mvm->fw_dump_trig &&
1133             mvm->fw_dump_trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
1134                 monitor_dump_only = true;
1135
1136         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1137         if (!fw_error_dump)
1138                 return;
1139
1140         /* SRAM - include stack CCM if driver knows the values for it */
1141         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1142                 const struct fw_img *img;
1143
1144                 img = &mvm->fw->img[mvm->cur_ucode];
1145                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1146                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1147         } else {
1148                 sram_ofs = mvm->cfg->dccm_offset;
1149                 sram_len = mvm->cfg->dccm_len;
1150         }
1151
1152         /* reading RXF/TXF sizes */
1153         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1154                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1155                 int i;
1156
1157                 fifo_data_len = 0;
1158
1159                 /* Count RXF size */
1160                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1161                         if (!mem_cfg->rxfifo_size[i])
1162                                 continue;
1163
1164                         /* Add header info */
1165                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1166                                          sizeof(*dump_data) +
1167                                          sizeof(struct iwl_fw_error_dump_fifo);
1168                 }
1169
1170                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1171                         if (!mem_cfg->txfifo_size[i])
1172                                 continue;
1173
1174                         /* Add header info */
1175                         fifo_data_len += mem_cfg->txfifo_size[i] +
1176                                          sizeof(*dump_data) +
1177                                          sizeof(struct iwl_fw_error_dump_fifo);
1178                 }
1179         }
1180
1181         file_len = sizeof(*dump_file) +
1182                    sizeof(*dump_data) * 2 +
1183                    sram_len + sizeof(*dump_mem) +
1184                    fifo_data_len +
1185                    sizeof(*dump_info);
1186
1187         /* Make room for the SMEM, if it exists */
1188         if (smem_len)
1189                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1190
1191         /* Make room for the secondary SRAM, if it exists */
1192         if (sram2_len)
1193                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1194
1195         /* Make room for fw's virtual image pages, if it exists */
1196         if (mvm->fw->img[mvm->cur_ucode].paging_mem_size)
1197                 file_len += mvm->num_of_paging_blk *
1198                         (sizeof(*dump_data) +
1199                          sizeof(struct iwl_fw_error_dump_paging) +
1200                          PAGING_BLOCK_SIZE);
1201
1202         /* If we only want a monitor dump, reset the file length */
1203         if (monitor_dump_only) {
1204                 file_len = sizeof(*dump_file) + sizeof(*dump_data) +
1205                            sizeof(*dump_info);
1206         }
1207
1208         /*
1209          * In 8000 HW family B-step include the ICCM (which resides separately)
1210          */
1211         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1212             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1213                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1214                             IWL8260_ICCM_LEN;
1215
1216         if (mvm->fw_dump_desc)
1217                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1218                             mvm->fw_dump_desc->len;
1219
1220         dump_file = vzalloc(file_len);
1221         if (!dump_file) {
1222                 kfree(fw_error_dump);
1223                 iwl_mvm_free_fw_dump_desc(mvm);
1224                 return;
1225         }
1226
1227         fw_error_dump->op_mode_ptr = dump_file;
1228
1229         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1230         dump_data = (void *)dump_file->data;
1231
1232         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1233         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1234         dump_info = (void *) dump_data->data;
1235         dump_info->device_family =
1236                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1237                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1238                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1239         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1240         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1241                sizeof(dump_info->fw_human_readable));
1242         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1243                 sizeof(dump_info->dev_human_readable));
1244         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1245                 sizeof(dump_info->bus_human_readable));
1246
1247         dump_data = iwl_fw_error_next_data(dump_data);
1248         /* We only dump the FIFOs if the FW is in error state */
1249         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1250                 iwl_mvm_dump_fifos(mvm, &dump_data);
1251
1252         if (mvm->fw_dump_desc) {
1253                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1254                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1255                                              mvm->fw_dump_desc->len);
1256                 dump_trig = (void *)dump_data->data;
1257                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1258                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1259
1260                 /* now we can free this copy */
1261                 iwl_mvm_free_fw_dump_desc(mvm);
1262                 dump_data = iwl_fw_error_next_data(dump_data);
1263         }
1264
1265         /* In case we only want monitor dump, skip to dump trasport data */
1266         if (monitor_dump_only)
1267                 goto dump_trans_data;
1268
1269         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1270         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1271         dump_mem = (void *)dump_data->data;
1272         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1273         dump_mem->offset = cpu_to_le32(sram_ofs);
1274         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1275                                  sram_len);
1276
1277         if (smem_len) {
1278                 dump_data = iwl_fw_error_next_data(dump_data);
1279                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1280                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1281                 dump_mem = (void *)dump_data->data;
1282                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1283                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1284                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1285                                          dump_mem->data, smem_len);
1286         }
1287
1288         if (sram2_len) {
1289                 dump_data = iwl_fw_error_next_data(dump_data);
1290                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1291                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1292                 dump_mem = (void *)dump_data->data;
1293                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1294                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1295                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1296                                          dump_mem->data, sram2_len);
1297         }
1298
1299         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1300             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1301                 dump_data = iwl_fw_error_next_data(dump_data);
1302                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1303                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1304                                              sizeof(*dump_mem));
1305                 dump_mem = (void *)dump_data->data;
1306                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1307                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1308                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1309                                          dump_mem->data, IWL8260_ICCM_LEN);
1310         }
1311
1312         /* Dump fw's virtual image */
1313         if (mvm->fw->img[mvm->cur_ucode].paging_mem_size) {
1314                 u32 i;
1315
1316                 for (i = 1; i < mvm->num_of_paging_blk + 1; i++) {
1317                         struct iwl_fw_error_dump_paging *paging;
1318                         struct page *pages =
1319                                 mvm->fw_paging_db[i].fw_paging_block;
1320
1321                         dump_data = iwl_fw_error_next_data(dump_data);
1322                         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
1323                         dump_data->len = cpu_to_le32(sizeof(*paging) +
1324                                                      PAGING_BLOCK_SIZE);
1325                         paging = (void *)dump_data->data;
1326                         paging->index = cpu_to_le32(i);
1327                         memcpy(paging->data, page_address(pages),
1328                                PAGING_BLOCK_SIZE);
1329                 }
1330         }
1331
1332 dump_trans_data:
1333         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,
1334                                                        mvm->fw_dump_trig);
1335         fw_error_dump->op_mode_len = file_len;
1336         if (fw_error_dump->trans_ptr)
1337                 file_len += fw_error_dump->trans_ptr->len;
1338         dump_file->file_len = cpu_to_le32(file_len);
1339
1340         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1341                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1342
1343         mvm->fw_dump_trig = NULL;
1344         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1345 }
1346
1347 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1348         .trig_desc = {
1349                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1350         },
1351 };
1352
1353 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1354 {
1355         /* clear the D3 reconfig, we only need it to avoid dumping a
1356          * firmware coredump on reconfiguration, we shouldn't do that
1357          * on D3->D0 transition
1358          */
1359         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1360                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1361                 iwl_mvm_fw_error_dump(mvm);
1362         }
1363
1364         /* cleanup all stale references (scan, roc), but keep the
1365          * ucode_down ref until reconfig is complete
1366          */
1367         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1368
1369         iwl_trans_stop_device(mvm->trans);
1370
1371         mvm->scan_status = 0;
1372         mvm->ps_disabled = false;
1373         mvm->calibrating = false;
1374
1375         /* just in case one was running */
1376         ieee80211_remain_on_channel_expired(mvm->hw);
1377
1378         /*
1379          * cleanup all interfaces, even inactive ones, as some might have
1380          * gone down during the HW restart
1381          */
1382         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1383
1384         mvm->p2p_device_vif = NULL;
1385         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1386
1387         iwl_mvm_reset_phy_ctxts(mvm);
1388         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1389         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1390         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1391         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1392         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1393         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1394         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1395         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1396
1397         ieee80211_wake_queues(mvm->hw);
1398
1399         /* clear any stale d0i3 state */
1400         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1401
1402         mvm->vif_count = 0;
1403         mvm->rx_ba_sessions = 0;
1404         mvm->fw_dbg_conf = FW_DBG_INVALID;
1405
1406         /* keep statistics ticking */
1407         iwl_mvm_accu_radio_stats(mvm);
1408 }
1409
1410 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1411 {
1412         int ret;
1413
1414         lockdep_assert_held(&mvm->mutex);
1415
1416         /* Clean up some internal and mac80211 state on restart */
1417         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1418                 iwl_mvm_restart_cleanup(mvm);
1419
1420         ret = iwl_mvm_up(mvm);
1421
1422         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1423                 /* Something went wrong - we need to finish some cleanup
1424                  * that normally iwl_mvm_mac_restart_complete() below
1425                  * would do.
1426                  */
1427                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1428                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1429         }
1430
1431         return ret;
1432 }
1433
1434 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1435 {
1436         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1437         int ret;
1438
1439         /* Some hw restart cleanups must not hold the mutex */
1440         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1441                 /*
1442                  * Make sure we are out of d0i3. This is needed
1443                  * to make sure the reference accounting is correct
1444                  * (and there is no stale d0i3_exit_work).
1445                  */
1446                 wait_event_timeout(mvm->d0i3_exit_waitq,
1447                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1448                                              &mvm->status),
1449                                    HZ);
1450         }
1451
1452         mutex_lock(&mvm->mutex);
1453         ret = __iwl_mvm_mac_start(mvm);
1454         mutex_unlock(&mvm->mutex);
1455
1456         return ret;
1457 }
1458
1459 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1460 {
1461         int ret;
1462
1463         mutex_lock(&mvm->mutex);
1464
1465         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1466         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1467         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1468         if (ret)
1469                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1470                         ret);
1471
1472         /* allow transport/FW low power modes */
1473         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1474
1475         /*
1476          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1477          * of packets the FW sent out, so we must reconnect.
1478          */
1479         iwl_mvm_teardown_tdls_peers(mvm);
1480
1481         mutex_unlock(&mvm->mutex);
1482 }
1483
1484 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1485 {
1486         if (!iwl_mvm_is_d0i3_supported(mvm))
1487                 return;
1488
1489         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1490                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1491                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1492                                                   &mvm->status),
1493                                         HZ))
1494                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1495 }
1496
1497 static void
1498 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1499                               enum ieee80211_reconfig_type reconfig_type)
1500 {
1501         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1502
1503         switch (reconfig_type) {
1504         case IEEE80211_RECONFIG_TYPE_RESTART:
1505                 iwl_mvm_restart_complete(mvm);
1506                 break;
1507         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1508                 iwl_mvm_resume_complete(mvm);
1509                 break;
1510         }
1511 }
1512
1513 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1514 {
1515         lockdep_assert_held(&mvm->mutex);
1516
1517         /* firmware counters are obviously reset now, but we shouldn't
1518          * partially track so also clear the fw_reset_accu counters.
1519          */
1520         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1521
1522         /*
1523          * Disallow low power states when the FW is down by taking
1524          * the UCODE_DOWN ref. in case of ongoing hw restart the
1525          * ref is already taken, so don't take it again.
1526          */
1527         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1528                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1529
1530         /* async_handlers_wk is now blocked */
1531
1532         /*
1533          * The work item could be running or queued if the
1534          * ROC time event stops just as we get here.
1535          */
1536         flush_work(&mvm->roc_done_wk);
1537
1538         iwl_trans_stop_device(mvm->trans);
1539
1540         iwl_mvm_async_handlers_purge(mvm);
1541         /* async_handlers_list is empty and will stay empty: HW is stopped */
1542
1543         /* the fw is stopped, the aux sta is dead: clean up driver state */
1544         iwl_mvm_del_aux_sta(mvm);
1545
1546         /*
1547          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1548          * won't be called in this case).
1549          * But make sure to cleanup interfaces that have gone down before/during
1550          * HW restart was requested.
1551          */
1552         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1553                 ieee80211_iterate_interfaces(mvm->hw, 0,
1554                                              iwl_mvm_cleanup_iterator, mvm);
1555
1556         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1557          * make sure there's nothing left there and warn if any is found.
1558          */
1559         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1560                 int i;
1561
1562                 for (i = 0; i < mvm->max_scans; i++) {
1563                         if (WARN_ONCE(mvm->scan_uid_status[i],
1564                                       "UMAC scan UID %d status was not cleaned\n",
1565                                       i))
1566                                 mvm->scan_uid_status[i] = 0;
1567                 }
1568         }
1569
1570         mvm->ucode_loaded = false;
1571 }
1572
1573 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1574 {
1575         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1576
1577         flush_work(&mvm->d0i3_exit_work);
1578         flush_work(&mvm->async_handlers_wk);
1579         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1580         iwl_mvm_free_fw_dump_desc(mvm);
1581
1582         mutex_lock(&mvm->mutex);
1583         __iwl_mvm_mac_stop(mvm);
1584         mutex_unlock(&mvm->mutex);
1585
1586         /*
1587          * The worker might have been waiting for the mutex, let it run and
1588          * discover that its list is now empty.
1589          */
1590         cancel_work_sync(&mvm->async_handlers_wk);
1591 }
1592
1593 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1594 {
1595         u16 i;
1596
1597         lockdep_assert_held(&mvm->mutex);
1598
1599         for (i = 0; i < NUM_PHY_CTX; i++)
1600                 if (!mvm->phy_ctxts[i].ref)
1601                         return &mvm->phy_ctxts[i];
1602
1603         IWL_ERR(mvm, "No available PHY context\n");
1604         return NULL;
1605 }
1606
1607 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1608                                 s16 tx_power)
1609 {
1610         struct iwl_dev_tx_power_cmd cmd = {
1611                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1612                 .v2.mac_context_id =
1613                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1614                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1615         };
1616         int len = sizeof(cmd);
1617
1618         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1619                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1620
1621         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1622                 len = sizeof(cmd.v2);
1623
1624         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1625 }
1626
1627 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1628                                      struct ieee80211_vif *vif)
1629 {
1630         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1631         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1632         int ret;
1633
1634         mvmvif->mvm = mvm;
1635
1636         /*
1637          * make sure D0i3 exit is completed, otherwise a target access
1638          * during tx queue configuration could be done when still in
1639          * D0i3 state.
1640          */
1641         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1642         if (ret)
1643                 return ret;
1644
1645         /*
1646          * Not much to do here. The stack will not allow interface
1647          * types or combinations that we didn't advertise, so we
1648          * don't really have to check the types.
1649          */
1650
1651         mutex_lock(&mvm->mutex);
1652
1653         /* make sure that beacon statistics don't go backwards with FW reset */
1654         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1655                 mvmvif->beacon_stats.accu_num_beacons +=
1656                         mvmvif->beacon_stats.num_beacons;
1657
1658         /* Allocate resources for the MAC context, and add it to the fw  */
1659         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1660         if (ret)
1661                 goto out_unlock;
1662
1663         /* Counting number of interfaces is needed for legacy PM */
1664         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1665                 mvm->vif_count++;
1666
1667         /*
1668          * The AP binding flow can be done only after the beacon
1669          * template is configured (which happens only in the mac80211
1670          * start_ap() flow), and adding the broadcast station can happen
1671          * only after the binding.
1672          * In addition, since modifying the MAC before adding a bcast
1673          * station is not allowed by the FW, delay the adding of MAC context to
1674          * the point where we can also add the bcast station.
1675          * In short: there's not much we can do at this point, other than
1676          * allocating resources :)
1677          */
1678         if (vif->type == NL80211_IFTYPE_AP ||
1679             vif->type == NL80211_IFTYPE_ADHOC) {
1680                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1681                 if (ret) {
1682                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1683                         goto out_release;
1684                 }
1685
1686                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1687                 goto out_unlock;
1688         }
1689
1690         mvmvif->features |= hw->netdev_features;
1691
1692         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1693         if (ret)
1694                 goto out_release;
1695
1696         ret = iwl_mvm_power_update_mac(mvm);
1697         if (ret)
1698                 goto out_remove_mac;
1699
1700         /* beacon filtering */
1701         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1702         if (ret)
1703                 goto out_remove_mac;
1704
1705         if (!mvm->bf_allowed_vif &&
1706             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1707                 mvm->bf_allowed_vif = mvmvif;
1708                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1709                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1710         }
1711
1712         /*
1713          * P2P_DEVICE interface does not have a channel context assigned to it,
1714          * so a dedicated PHY context is allocated to it and the corresponding
1715          * MAC context is bound to it at this stage.
1716          */
1717         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1718
1719                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1720                 if (!mvmvif->phy_ctxt) {
1721                         ret = -ENOSPC;
1722                         goto out_free_bf;
1723                 }
1724
1725                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1726                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1727                 if (ret)
1728                         goto out_unref_phy;
1729
1730                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1731                 if (ret)
1732                         goto out_unbind;
1733
1734                 /* Save a pointer to p2p device vif, so it can later be used to
1735                  * update the p2p device MAC when a GO is started/stopped */
1736                 mvm->p2p_device_vif = vif;
1737         }
1738
1739         iwl_mvm_vif_dbgfs_register(mvm, vif);
1740         goto out_unlock;
1741
1742  out_unbind:
1743         iwl_mvm_binding_remove_vif(mvm, vif);
1744  out_unref_phy:
1745         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1746  out_free_bf:
1747         if (mvm->bf_allowed_vif == mvmvif) {
1748                 mvm->bf_allowed_vif = NULL;
1749                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1750                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1751         }
1752  out_remove_mac:
1753         mvmvif->phy_ctxt = NULL;
1754         iwl_mvm_mac_ctxt_remove(mvm, vif);
1755  out_release:
1756         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1757                 mvm->vif_count--;
1758
1759         iwl_mvm_mac_ctxt_release(mvm, vif);
1760  out_unlock:
1761         mutex_unlock(&mvm->mutex);
1762
1763         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1764
1765         return ret;
1766 }
1767
1768 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1769                                         struct ieee80211_vif *vif)
1770 {
1771         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1772
1773         if (tfd_msk) {
1774                 /*
1775                  * mac80211 first removes all the stations of the vif and
1776                  * then removes the vif. When it removes a station it also
1777                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1778                  * of all the stations of this vif are closed, and the queues
1779                  * of these AMPDU sessions are properly closed.
1780                  * We still need to take care of the shared queues of the vif.
1781                  * Flush them here.
1782                  */
1783                 mutex_lock(&mvm->mutex);
1784                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1785                 mutex_unlock(&mvm->mutex);
1786
1787                 /*
1788                  * There are transports that buffer a few frames in the host.
1789                  * For these, the flush above isn't enough since while we were
1790                  * flushing, the transport might have sent more frames to the
1791                  * device. To solve this, wait here until the transport is
1792                  * empty. Technically, this could have replaced the flush
1793                  * above, but flush is much faster than draining. So flush
1794                  * first, and drain to make sure we have no frames in the
1795                  * transport anymore.
1796                  * If a station still had frames on the shared queues, it is
1797                  * already marked as draining, so to complete the draining, we
1798                  * just need to wait until the transport is empty.
1799                  */
1800                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1801         }
1802
1803         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1804                 /*
1805                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1806                  * We assume here that all the packets sent to the OFFCHANNEL
1807                  * queue are sent in ROC session.
1808                  */
1809                 flush_work(&mvm->roc_done_wk);
1810         } else {
1811                 /*
1812                  * By now, all the AC queues are empty. The AGG queues are
1813                  * empty too. We already got all the Tx responses for all the
1814                  * packets in the queues. The drain work can have been
1815                  * triggered. Flush it.
1816                  */
1817                 flush_work(&mvm->sta_drained_wk);
1818         }
1819 }
1820
1821 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1822                                          struct ieee80211_vif *vif)
1823 {
1824         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1825         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1826
1827         iwl_mvm_prepare_mac_removal(mvm, vif);
1828
1829         mutex_lock(&mvm->mutex);
1830
1831         if (mvm->bf_allowed_vif == mvmvif) {
1832                 mvm->bf_allowed_vif = NULL;
1833                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1834                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1835         }
1836
1837         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1838
1839         /*
1840          * For AP/GO interface, the tear down of the resources allocated to the
1841          * interface is be handled as part of the stop_ap flow.
1842          */
1843         if (vif->type == NL80211_IFTYPE_AP ||
1844             vif->type == NL80211_IFTYPE_ADHOC) {
1845 #ifdef CONFIG_NL80211_TESTMODE
1846                 if (vif == mvm->noa_vif) {
1847                         mvm->noa_vif = NULL;
1848                         mvm->noa_duration = 0;
1849                 }
1850 #endif
1851                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1852                 goto out_release;
1853         }
1854
1855         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1856                 mvm->p2p_device_vif = NULL;
1857                 iwl_mvm_rm_bcast_sta(mvm, vif);
1858                 iwl_mvm_binding_remove_vif(mvm, vif);
1859                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1860                 mvmvif->phy_ctxt = NULL;
1861         }
1862
1863         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1864                 mvm->vif_count--;
1865
1866         iwl_mvm_power_update_mac(mvm);
1867         iwl_mvm_mac_ctxt_remove(mvm, vif);
1868
1869 out_release:
1870         iwl_mvm_mac_ctxt_release(mvm, vif);
1871         mutex_unlock(&mvm->mutex);
1872 }
1873
1874 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1875 {
1876         return 0;
1877 }
1878
1879 struct iwl_mvm_mc_iter_data {
1880         struct iwl_mvm *mvm;
1881         int port_id;
1882 };
1883
1884 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1885                                       struct ieee80211_vif *vif)
1886 {
1887         struct iwl_mvm_mc_iter_data *data = _data;
1888         struct iwl_mvm *mvm = data->mvm;
1889         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1890         int ret, len;
1891
1892         /* if we don't have free ports, mcast frames will be dropped */
1893         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1894                 return;
1895
1896         if (vif->type != NL80211_IFTYPE_STATION ||
1897             !vif->bss_conf.assoc)
1898                 return;
1899
1900         cmd->port_id = data->port_id++;
1901         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1902         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1903
1904         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1905         if (ret)
1906                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1907 }
1908
1909 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1910 {
1911         struct iwl_mvm_mc_iter_data iter_data = {
1912                 .mvm = mvm,
1913         };
1914
1915         lockdep_assert_held(&mvm->mutex);
1916
1917         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1918                 return;
1919
1920         ieee80211_iterate_active_interfaces_atomic(
1921                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1922                 iwl_mvm_mc_iface_iterator, &iter_data);
1923 }
1924
1925 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1926                                      struct netdev_hw_addr_list *mc_list)
1927 {
1928         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1929         struct iwl_mcast_filter_cmd *cmd;
1930         struct netdev_hw_addr *addr;
1931         int addr_count;
1932         bool pass_all;
1933         int len;
1934
1935         addr_count = netdev_hw_addr_list_count(mc_list);
1936         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1937                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1938         if (pass_all)
1939                 addr_count = 0;
1940
1941         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1942         cmd = kzalloc(len, GFP_ATOMIC);
1943         if (!cmd)
1944                 return 0;
1945
1946         if (pass_all) {
1947                 cmd->pass_all = 1;
1948                 return (u64)(unsigned long)cmd;
1949         }
1950
1951         netdev_hw_addr_list_for_each(addr, mc_list) {
1952                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1953                                    cmd->count, addr->addr);
1954                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1955                        addr->addr, ETH_ALEN);
1956                 cmd->count++;
1957         }
1958
1959         return (u64)(unsigned long)cmd;
1960 }
1961
1962 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1963                                      unsigned int changed_flags,
1964                                      unsigned int *total_flags,
1965                                      u64 multicast)
1966 {
1967         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1968         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1969
1970         mutex_lock(&mvm->mutex);
1971
1972         /* replace previous configuration */
1973         kfree(mvm->mcast_filter_cmd);
1974         mvm->mcast_filter_cmd = cmd;
1975
1976         if (!cmd)
1977                 goto out;
1978
1979         iwl_mvm_recalc_multicast(mvm);
1980 out:
1981         mutex_unlock(&mvm->mutex);
1982         *total_flags = 0;
1983 }
1984
1985 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1986 struct iwl_bcast_iter_data {
1987         struct iwl_mvm *mvm;
1988         struct iwl_bcast_filter_cmd *cmd;
1989         u8 current_filter;
1990 };
1991
1992 static void
1993 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1994                          const struct iwl_fw_bcast_filter *in_filter,
1995                          struct iwl_fw_bcast_filter *out_filter)
1996 {
1997         struct iwl_fw_bcast_filter_attr *attr;
1998         int i;
1999
2000         memcpy(out_filter, in_filter, sizeof(*out_filter));
2001
2002         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
2003                 attr = &out_filter->attrs[i];
2004
2005                 if (!attr->mask)
2006                         break;
2007
2008                 switch (attr->reserved1) {
2009                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
2010                         if (vif->bss_conf.arp_addr_cnt != 1) {
2011                                 attr->mask = 0;
2012                                 continue;
2013                         }
2014
2015                         attr->val = vif->bss_conf.arp_addr_list[0];
2016                         break;
2017                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
2018                         attr->val = *(__be32 *)&vif->addr[2];
2019                         break;
2020                 default:
2021                         break;
2022                 }
2023                 attr->reserved1 = 0;
2024                 out_filter->num_attrs++;
2025         }
2026 }
2027
2028 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
2029                                           struct ieee80211_vif *vif)
2030 {
2031         struct iwl_bcast_iter_data *data = _data;
2032         struct iwl_mvm *mvm = data->mvm;
2033         struct iwl_bcast_filter_cmd *cmd = data->cmd;
2034         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2035         struct iwl_fw_bcast_mac *bcast_mac;
2036         int i;
2037
2038         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
2039                 return;
2040
2041         bcast_mac = &cmd->macs[mvmvif->id];
2042
2043         /*
2044          * enable filtering only for associated stations, but not for P2P
2045          * Clients
2046          */
2047         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
2048             !vif->bss_conf.assoc)
2049                 return;
2050
2051         bcast_mac->default_discard = 1;
2052
2053         /* copy all configured filters */
2054         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
2055                 /*
2056                  * Make sure we don't exceed our filters limit.
2057                  * if there is still a valid filter to be configured,
2058                  * be on the safe side and just allow bcast for this mac.
2059                  */
2060                 if (WARN_ON_ONCE(data->current_filter >=
2061                                  ARRAY_SIZE(cmd->filters))) {
2062                         bcast_mac->default_discard = 0;
2063                         bcast_mac->attached_filters = 0;
2064                         break;
2065                 }
2066
2067                 iwl_mvm_set_bcast_filter(vif,
2068                                          &mvm->bcast_filters[i],
2069                                          &cmd->filters[data->current_filter]);
2070
2071                 /* skip current filter if it contains no attributes */
2072                 if (!cmd->filters[data->current_filter].num_attrs)
2073                         continue;
2074
2075                 /* attach the filter to current mac */
2076                 bcast_mac->attached_filters |=
2077                                 cpu_to_le16(BIT(data->current_filter));
2078
2079                 data->current_filter++;
2080         }
2081 }
2082
2083 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
2084                                     struct iwl_bcast_filter_cmd *cmd)
2085 {
2086         struct iwl_bcast_iter_data iter_data = {
2087                 .mvm = mvm,
2088                 .cmd = cmd,
2089         };
2090
2091         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
2092                 return false;
2093
2094         memset(cmd, 0, sizeof(*cmd));
2095         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
2096         cmd->max_macs = ARRAY_SIZE(cmd->macs);
2097
2098 #ifdef CONFIG_IWLWIFI_DEBUGFS
2099         /* use debugfs filters/macs if override is configured */
2100         if (mvm->dbgfs_bcast_filtering.override) {
2101                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
2102                        sizeof(cmd->filters));
2103                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
2104                        sizeof(cmd->macs));
2105                 return true;
2106         }
2107 #endif
2108
2109         /* if no filters are configured, do nothing */
2110         if (!mvm->bcast_filters)
2111                 return false;
2112
2113         /* configure and attach these filters for each associated sta vif */
2114         ieee80211_iterate_active_interfaces(
2115                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2116                 iwl_mvm_bcast_filter_iterator, &iter_data);
2117
2118         return true;
2119 }
2120 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2121                                           struct ieee80211_vif *vif)
2122 {
2123         struct iwl_bcast_filter_cmd cmd;
2124
2125         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2126                 return 0;
2127
2128         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2129                 return 0;
2130
2131         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2132                                     sizeof(cmd), &cmd);
2133 }
2134 #else
2135 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2136                                                  struct ieee80211_vif *vif)
2137 {
2138         return 0;
2139 }
2140 #endif
2141
2142 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2143                                              struct ieee80211_vif *vif,
2144                                              struct ieee80211_bss_conf *bss_conf,
2145                                              u32 changes)
2146 {
2147         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2148         int ret;
2149
2150         /*
2151          * Re-calculate the tsf id, as the master-slave relations depend on the
2152          * beacon interval, which was not known when the station interface was
2153          * added.
2154          */
2155         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2156                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2157
2158         /*
2159          * If we're not associated yet, take the (new) BSSID before associating
2160          * so the firmware knows. If we're already associated, then use the old
2161          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2162          * branch for disassociation below.
2163          */
2164         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2165                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2166
2167         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2168         if (ret)
2169                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2170
2171         /* after sending it once, adopt mac80211 data */
2172         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2173         mvmvif->associated = bss_conf->assoc;
2174
2175         if (changes & BSS_CHANGED_ASSOC) {
2176                 if (bss_conf->assoc) {
2177                         /* clear statistics to get clean beacon counter */
2178                         iwl_mvm_request_statistics(mvm, true);
2179                         memset(&mvmvif->beacon_stats, 0,
2180                                sizeof(mvmvif->beacon_stats));
2181
2182                         /* add quota for this interface */
2183                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2184                         if (ret) {
2185                                 IWL_ERR(mvm, "failed to update quotas\n");
2186                                 return;
2187                         }
2188
2189                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2190                                      &mvm->status)) {
2191                                 /*
2192                                  * If we're restarting then the firmware will
2193                                  * obviously have lost synchronisation with
2194                                  * the AP. It will attempt to synchronise by
2195                                  * itself, but we can make it more reliable by
2196                                  * scheduling a session protection time event.
2197                                  *
2198                                  * The firmware needs to receive a beacon to
2199                                  * catch up with synchronisation, use 110% of
2200                                  * the beacon interval.
2201                                  *
2202                                  * Set a large maximum delay to allow for more
2203                                  * than a single interface.
2204                                  */
2205                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2206                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2207                                                         5 * dur, false);
2208                         }
2209
2210                         iwl_mvm_sf_update(mvm, vif, false);
2211                         iwl_mvm_power_vif_assoc(mvm, vif);
2212                         if (vif->p2p) {
2213                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2214                                 iwl_mvm_update_smps(mvm, vif,
2215                                                     IWL_MVM_SMPS_REQ_PROT,
2216                                                     IEEE80211_SMPS_DYNAMIC);
2217                         }
2218                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2219                         /*
2220                          * If update fails - SF might be running in associated
2221                          * mode while disassociated - which is forbidden.
2222                          */
2223                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2224                                   "Failed to update SF upon disassociation\n");
2225
2226                         /* remove AP station now that the MAC is unassoc */
2227                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2228                         if (ret)
2229                                 IWL_ERR(mvm, "failed to remove AP station\n");
2230
2231                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2232                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2233                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2234                         /* remove quota for this interface */
2235                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2236                         if (ret)
2237                                 IWL_ERR(mvm, "failed to update quotas\n");
2238
2239                         if (vif->p2p)
2240                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2241
2242                         /* this will take the cleared BSSID from bss_conf */
2243                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2244                         if (ret)
2245                                 IWL_ERR(mvm,
2246                                         "failed to update MAC %pM (clear after unassoc)\n",
2247                                         vif->addr);
2248                 }
2249
2250                 iwl_mvm_recalc_multicast(mvm);
2251                 iwl_mvm_configure_bcast_filter(mvm, vif);
2252
2253                 /* reset rssi values */
2254                 mvmvif->bf_data.ave_beacon_signal = 0;
2255
2256                 iwl_mvm_bt_coex_vif_change(mvm);
2257                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2258                                     IEEE80211_SMPS_AUTOMATIC);
2259         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2260                 /*
2261                  * We received a beacon _after_ association so
2262                  * remove the session protection.
2263                  */
2264                 iwl_mvm_remove_time_event(mvm, mvmvif,
2265                                           &mvmvif->time_event_data);
2266         }
2267
2268         if (changes & BSS_CHANGED_BEACON_INFO) {
2269                 iwl_mvm_sf_update(mvm, vif, false);
2270                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2271         }
2272
2273         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2274                 ret = iwl_mvm_power_update_mac(mvm);
2275                 if (ret)
2276                         IWL_ERR(mvm, "failed to update power mode\n");
2277         }
2278
2279         if (changes & BSS_CHANGED_TXPOWER) {
2280                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2281                                 bss_conf->txpower);
2282                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2283         }
2284
2285         if (changes & BSS_CHANGED_CQM) {
2286                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2287                 /* reset cqm events tracking */
2288                 mvmvif->bf_data.last_cqm_event = 0;
2289                 if (mvmvif->bf_data.bf_enabled) {
2290                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2291                         if (ret)
2292                                 IWL_ERR(mvm,
2293                                         "failed to update CQM thresholds\n");
2294                 }
2295         }
2296
2297         if (changes & BSS_CHANGED_ARP_FILTER) {
2298                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2299                 iwl_mvm_configure_bcast_filter(mvm, vif);
2300         }
2301 }
2302
2303 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2304                                  struct ieee80211_vif *vif)
2305 {
2306         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2307         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2308         int ret;
2309
2310         /*
2311          * iwl_mvm_mac_ctxt_add() might read directly from the device
2312          * (the system time), so make sure it is available.
2313          */
2314         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2315         if (ret)
2316                 return ret;
2317
2318         mutex_lock(&mvm->mutex);
2319
2320         /* Send the beacon template */
2321         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2322         if (ret)
2323                 goto out_unlock;
2324
2325         /*
2326          * Re-calculate the tsf id, as the master-slave relations depend on the
2327          * beacon interval, which was not known when the AP interface was added.
2328          */
2329         if (vif->type == NL80211_IFTYPE_AP)
2330                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2331
2332         mvmvif->ap_assoc_sta_count = 0;
2333
2334         /* Add the mac context */
2335         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2336         if (ret)
2337                 goto out_unlock;
2338
2339         /* Perform the binding */
2340         ret = iwl_mvm_binding_add_vif(mvm, vif);
2341         if (ret)
2342                 goto out_remove;
2343
2344         /* Send the bcast station. At this stage the TBTT and DTIM time events
2345          * are added and applied to the scheduler */
2346         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2347         if (ret)
2348                 goto out_unbind;
2349
2350         /* must be set before quota calculations */
2351         mvmvif->ap_ibss_active = true;
2352
2353         /* power updated needs to be done before quotas */
2354         iwl_mvm_power_update_mac(mvm);
2355
2356         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2357         if (ret)
2358                 goto out_quota_failed;
2359
2360         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2361         if (vif->p2p && mvm->p2p_device_vif)
2362                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2363
2364         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2365
2366         iwl_mvm_bt_coex_vif_change(mvm);
2367
2368         /* we don't support TDLS during DCM */
2369         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2370                 iwl_mvm_teardown_tdls_peers(mvm);
2371
2372         goto out_unlock;
2373
2374 out_quota_failed:
2375         iwl_mvm_power_update_mac(mvm);
2376         mvmvif->ap_ibss_active = false;
2377         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2378 out_unbind:
2379         iwl_mvm_binding_remove_vif(mvm, vif);
2380 out_remove:
2381         iwl_mvm_mac_ctxt_remove(mvm, vif);
2382 out_unlock:
2383         mutex_unlock(&mvm->mutex);
2384         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2385         return ret;
2386 }
2387
2388 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2389                                  struct ieee80211_vif *vif)
2390 {
2391         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2392         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2393
2394         iwl_mvm_prepare_mac_removal(mvm, vif);
2395
2396         mutex_lock(&mvm->mutex);
2397
2398         /* Handle AP stop while in CSA */
2399         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2400                 iwl_mvm_remove_time_event(mvm, mvmvif,
2401                                           &mvmvif->time_event_data);
2402                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2403         }
2404
2405         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2406                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2407                 mvm->csa_tx_block_bcn_timeout = 0;
2408         }
2409
2410         mvmvif->ap_ibss_active = false;
2411         mvm->ap_last_beacon_gp2 = 0;
2412
2413         iwl_mvm_bt_coex_vif_change(mvm);
2414
2415         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2416
2417         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2418         if (vif->p2p && mvm->p2p_device_vif)
2419                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2420
2421         iwl_mvm_update_quotas(mvm, false, NULL);
2422         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2423         iwl_mvm_binding_remove_vif(mvm, vif);
2424
2425         iwl_mvm_power_update_mac(mvm);
2426
2427         iwl_mvm_mac_ctxt_remove(mvm, vif);
2428
2429         mutex_unlock(&mvm->mutex);
2430 }
2431
2432 static void
2433 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2434                                  struct ieee80211_vif *vif,
2435                                  struct ieee80211_bss_conf *bss_conf,
2436                                  u32 changes)
2437 {
2438         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2439
2440         /* Changes will be applied when the AP/IBSS is started */
2441         if (!mvmvif->ap_ibss_active)
2442                 return;
2443
2444         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2445                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2446             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2447                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2448
2449         /* Need to send a new beacon template to the FW */
2450         if (changes & BSS_CHANGED_BEACON &&
2451             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2452                 IWL_WARN(mvm, "Failed updating beacon data\n");
2453
2454         if (changes & BSS_CHANGED_TXPOWER) {
2455                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2456                                 bss_conf->txpower);
2457                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2458         }
2459
2460 }
2461
2462 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2463                                      struct ieee80211_vif *vif,
2464                                      struct ieee80211_bss_conf *bss_conf,
2465                                      u32 changes)
2466 {
2467         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2468
2469         /*
2470          * iwl_mvm_bss_info_changed_station() might call
2471          * iwl_mvm_protect_session(), which reads directly from
2472          * the device (the system time), so make sure it is available.
2473          */
2474         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2475                 return;
2476
2477         mutex_lock(&mvm->mutex);
2478
2479         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2480                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2481
2482         switch (vif->type) {
2483         case NL80211_IFTYPE_STATION:
2484                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2485                 break;
2486         case NL80211_IFTYPE_AP:
2487         case NL80211_IFTYPE_ADHOC:
2488                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2489                 break;
2490         default:
2491                 /* shouldn't happen */
2492                 WARN_ON_ONCE(1);
2493         }
2494
2495         mutex_unlock(&mvm->mutex);
2496         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2497 }
2498
2499 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2500                                struct ieee80211_vif *vif,
2501                                struct ieee80211_scan_request *hw_req)
2502 {
2503         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2504         int ret;
2505
2506         if (hw_req->req.n_channels == 0 ||
2507             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2508                 return -EINVAL;
2509
2510         mutex_lock(&mvm->mutex);
2511         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2512         mutex_unlock(&mvm->mutex);
2513
2514         return ret;
2515 }
2516
2517 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2518                                        struct ieee80211_vif *vif)
2519 {
2520         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2521
2522         mutex_lock(&mvm->mutex);
2523
2524         /* Due to a race condition, it's possible that mac80211 asks
2525          * us to stop a hw_scan when it's already stopped.  This can
2526          * happen, for instance, if we stopped the scan ourselves,
2527          * called ieee80211_scan_completed() and the userspace called
2528          * cancel scan scan before ieee80211_scan_work() could run.
2529          * To handle that, simply return if the scan is not running.
2530         */
2531         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2532                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2533
2534         mutex_unlock(&mvm->mutex);
2535 }
2536
2537 static void
2538 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2539                                   struct ieee80211_sta *sta, u16 tids,
2540                                   int num_frames,
2541                                   enum ieee80211_frame_release_type reason,
2542                                   bool more_data)
2543 {
2544         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2545
2546         /* Called when we need to transmit (a) frame(s) from mac80211 */
2547
2548         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2549                                           tids, more_data, false);
2550 }
2551
2552 static void
2553 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2554                                     struct ieee80211_sta *sta, u16 tids,
2555                                     int num_frames,
2556                                     enum ieee80211_frame_release_type reason,
2557                                     bool more_data)
2558 {
2559         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2560
2561         /* Called when we need to transmit (a) frame(s) from agg queue */
2562
2563         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2564                                           tids, more_data, true);
2565 }
2566
2567 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2568                                    struct ieee80211_vif *vif,
2569                                    enum sta_notify_cmd cmd,
2570                                    struct ieee80211_sta *sta)
2571 {
2572         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2573         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2574         unsigned long txqs = 0, tids = 0;
2575         int tid;
2576
2577         spin_lock_bh(&mvmsta->lock);
2578         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2579                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2580
2581                 if (tid_data->state != IWL_AGG_ON &&
2582                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2583                         continue;
2584
2585                 __set_bit(tid_data->txq_id, &txqs);
2586
2587                 if (iwl_mvm_tid_queued(tid_data) == 0)
2588                         continue;
2589
2590                 __set_bit(tid, &tids);
2591         }
2592
2593         switch (cmd) {
2594         case STA_NOTIFY_SLEEP:
2595                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2596                         ieee80211_sta_block_awake(hw, sta, true);
2597
2598                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2599                         ieee80211_sta_set_buffered(sta, tid, true);
2600
2601                 if (txqs)
2602                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2603                 /*
2604                  * The fw updates the STA to be asleep. Tx packets on the Tx
2605                  * queues to this station will not be transmitted. The fw will
2606                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2607                  */
2608                 break;
2609         case STA_NOTIFY_AWAKE:
2610                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2611                         break;
2612
2613                 if (txqs)
2614                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2615                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2616                 break;
2617         default:
2618                 break;
2619         }
2620         spin_unlock_bh(&mvmsta->lock);
2621 }
2622
2623 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2624                                        struct ieee80211_vif *vif,
2625                                        struct ieee80211_sta *sta)
2626 {
2627         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2628         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2629         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2630
2631         /*
2632          * This is called before mac80211 does RCU synchronisation,
2633          * so here we already invalidate our internal RCU-protected
2634          * station pointer. The rest of the code will thus no longer
2635          * be able to find the station this way, and we don't rely
2636          * on further RCU synchronisation after the sta_state()
2637          * callback deleted the station.
2638          */
2639         mutex_lock(&mvm->mutex);
2640         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2641                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2642                                    ERR_PTR(-ENOENT));
2643
2644         if (mvm_sta->vif->type == NL80211_IFTYPE_AP) {
2645                 mvmvif->ap_assoc_sta_count--;
2646                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2647         }
2648
2649         mutex_unlock(&mvm->mutex);
2650 }
2651
2652 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2653                                 const u8 *bssid)
2654 {
2655         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2656                 return;
2657
2658         if (iwlwifi_mod_params.uapsd_disable) {
2659                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2660                 return;
2661         }
2662
2663         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2664 }
2665
2666 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2667                                  struct ieee80211_vif *vif,
2668                                  struct ieee80211_sta *sta,
2669                                  enum ieee80211_sta_state old_state,
2670                                  enum ieee80211_sta_state new_state)
2671 {
2672         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2673         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2674         int ret;
2675
2676         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2677                            sta->addr, old_state, new_state);
2678
2679         /* this would be a mac80211 bug ... but don't crash */
2680         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2681                 return -EINVAL;
2682
2683         /* if a STA is being removed, reuse its ID */
2684         flush_work(&mvm->sta_drained_wk);
2685
2686         mutex_lock(&mvm->mutex);
2687         if (old_state == IEEE80211_STA_NOTEXIST &&
2688             new_state == IEEE80211_STA_NONE) {
2689                 /*
2690                  * Firmware bug - it'll crash if the beacon interval is less
2691                  * than 16. We can't avoid connecting at all, so refuse the
2692                  * station state change, this will cause mac80211 to abandon
2693                  * attempts to connect to this AP, and eventually wpa_s will
2694                  * blacklist the AP...
2695                  */
2696                 if (vif->type == NL80211_IFTYPE_STATION &&
2697                     vif->bss_conf.beacon_int < 16) {
2698                         IWL_ERR(mvm,
2699                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2700                                 sta->addr, vif->bss_conf.beacon_int);
2701                         ret = -EINVAL;
2702                         goto out_unlock;
2703                 }
2704
2705                 if (sta->tdls &&
2706                     (vif->p2p ||
2707                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2708                                                 IWL_MVM_TDLS_STA_COUNT ||
2709                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2710                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2711                         ret = -EBUSY;
2712                         goto out_unlock;
2713                 }
2714
2715                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2716                 if (sta->tdls && ret == 0)
2717                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2718         } else if (old_state == IEEE80211_STA_NONE &&
2719                    new_state == IEEE80211_STA_AUTH) {
2720                 /*
2721                  * EBS may be disabled due to previous failures reported by FW.
2722                  * Reset EBS status here assuming environment has been changed.
2723                  */
2724                 mvm->last_ebs_successful = true;
2725                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2726                 ret = 0;
2727         } else if (old_state == IEEE80211_STA_AUTH &&
2728                    new_state == IEEE80211_STA_ASSOC) {
2729                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2730                 if (ret == 0)
2731                         iwl_mvm_rs_rate_init(mvm, sta,
2732                                              mvmvif->phy_ctxt->channel->band,
2733                                              true);
2734         } else if (old_state == IEEE80211_STA_ASSOC &&
2735                    new_state == IEEE80211_STA_AUTHORIZED) {
2736
2737                 /* we don't support TDLS during DCM */
2738                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2739                         iwl_mvm_teardown_tdls_peers(mvm);
2740
2741                 /* enable beacon filtering */
2742                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2743                 ret = 0;
2744         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2745                    new_state == IEEE80211_STA_ASSOC) {
2746                 /* disable beacon filtering */
2747                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2748                 ret = 0;
2749         } else if (old_state == IEEE80211_STA_ASSOC &&
2750                    new_state == IEEE80211_STA_AUTH) {
2751                 ret = 0;
2752         } else if (old_state == IEEE80211_STA_AUTH &&
2753                    new_state == IEEE80211_STA_NONE) {
2754                 ret = 0;
2755         } else if (old_state == IEEE80211_STA_NONE &&
2756                    new_state == IEEE80211_STA_NOTEXIST) {
2757                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2758                 if (sta->tdls)
2759                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2760         } else {
2761                 ret = -EIO;
2762         }
2763  out_unlock:
2764         mutex_unlock(&mvm->mutex);
2765
2766         if (sta->tdls && ret == 0) {
2767                 if (old_state == IEEE80211_STA_NOTEXIST &&
2768                     new_state == IEEE80211_STA_NONE)
2769                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2770                 else if (old_state == IEEE80211_STA_NONE &&
2771                          new_state == IEEE80211_STA_NOTEXIST)
2772                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2773         }
2774
2775         return ret;
2776 }
2777
2778 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2779 {
2780         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2781
2782         mvm->rts_threshold = value;
2783
2784         return 0;
2785 }
2786
2787 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2788                                   struct ieee80211_vif *vif,
2789                                   struct ieee80211_sta *sta, u32 changed)
2790 {
2791         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2792
2793         if (vif->type == NL80211_IFTYPE_STATION &&
2794             changed & IEEE80211_RC_NSS_CHANGED)
2795                 iwl_mvm_sf_update(mvm, vif, false);
2796 }
2797
2798 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2799                                struct ieee80211_vif *vif, u16 ac,
2800                                const struct ieee80211_tx_queue_params *params)
2801 {
2802         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2803         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2804
2805         mvmvif->queue_params[ac] = *params;
2806
2807         /*
2808          * No need to update right away, we'll get BSS_CHANGED_QOS
2809          * The exception is P2P_DEVICE interface which needs immediate update.
2810          */
2811         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2812                 int ret;
2813
2814                 mutex_lock(&mvm->mutex);
2815                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2816                 mutex_unlock(&mvm->mutex);
2817                 return ret;
2818         }
2819         return 0;
2820 }
2821
2822 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2823                                       struct ieee80211_vif *vif)
2824 {
2825         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2826         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2827                            200 + vif->bss_conf.beacon_int);
2828         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2829                                100 + vif->bss_conf.beacon_int);
2830
2831         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2832                 return;
2833
2834         /*
2835          * iwl_mvm_protect_session() reads directly from the device
2836          * (the system time), so make sure it is available.
2837          */
2838         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2839                 return;
2840
2841         mutex_lock(&mvm->mutex);
2842         /* Try really hard to protect the session and hear a beacon */
2843         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2844         mutex_unlock(&mvm->mutex);
2845
2846         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2847 }
2848
2849 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2850                                         struct ieee80211_vif *vif,
2851                                         struct cfg80211_sched_scan_request *req,
2852                                         struct ieee80211_scan_ies *ies)
2853 {
2854         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2855
2856         int ret;
2857
2858         mutex_lock(&mvm->mutex);
2859
2860         if (!vif->bss_conf.idle) {
2861                 ret = -EBUSY;
2862                 goto out;
2863         }
2864
2865         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2866
2867 out:
2868         mutex_unlock(&mvm->mutex);
2869         return ret;
2870 }
2871
2872 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2873                                        struct ieee80211_vif *vif)
2874 {
2875         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2876         int ret;
2877
2878         mutex_lock(&mvm->mutex);
2879
2880         /* Due to a race condition, it's possible that mac80211 asks
2881          * us to stop a sched_scan when it's already stopped.  This
2882          * can happen, for instance, if we stopped the scan ourselves,
2883          * called ieee80211_sched_scan_stopped() and the userspace called
2884          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2885          * could run.  To handle this, simply return if the scan is
2886          * not running.
2887         */
2888         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2889                 mutex_unlock(&mvm->mutex);
2890                 return 0;
2891         }
2892
2893         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2894         mutex_unlock(&mvm->mutex);
2895         iwl_mvm_wait_for_async_handlers(mvm);
2896
2897         return ret;
2898 }
2899
2900 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2901                                enum set_key_cmd cmd,
2902                                struct ieee80211_vif *vif,
2903                                struct ieee80211_sta *sta,
2904                                struct ieee80211_key_conf *key)
2905 {
2906         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2907         int ret;
2908
2909         if (iwlwifi_mod_params.sw_crypto) {
2910                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2911                 return -EOPNOTSUPP;
2912         }
2913
2914         switch (key->cipher) {
2915         case WLAN_CIPHER_SUITE_TKIP:
2916                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2917                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2918                 break;
2919         case WLAN_CIPHER_SUITE_CCMP:
2920                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2921                 break;
2922         case WLAN_CIPHER_SUITE_AES_CMAC:
2923                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2924                 break;
2925         case WLAN_CIPHER_SUITE_WEP40:
2926         case WLAN_CIPHER_SUITE_WEP104:
2927                 /* For non-client mode, only use WEP keys for TX as we probably
2928                  * don't have a station yet anyway and would then have to keep
2929                  * track of the keys, linking them to each of the clients/peers
2930                  * as they appear. For now, don't do that, for performance WEP
2931                  * offload doesn't really matter much, but we need it for some
2932                  * other offload features in client mode.
2933                  */
2934                 if (vif->type != NL80211_IFTYPE_STATION)
2935                         return 0;
2936                 break;
2937         default:
2938                 /* currently FW supports only one optional cipher scheme */
2939                 if (hw->n_cipher_schemes &&
2940                     hw->cipher_schemes->cipher == key->cipher)
2941                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2942                 else
2943                         return -EOPNOTSUPP;
2944         }
2945
2946         mutex_lock(&mvm->mutex);
2947
2948         switch (cmd) {
2949         case SET_KEY:
2950                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2951                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2952                         /*
2953                          * GTK on AP interface is a TX-only key, return 0;
2954                          * on IBSS they're per-station and because we're lazy
2955                          * we don't support them for RX, so do the same.
2956                          */
2957                         ret = 0;
2958                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2959                         break;
2960                 }
2961
2962                 /* During FW restart, in order to restore the state as it was,
2963                  * don't try to reprogram keys we previously failed for.
2964                  */
2965                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2966                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2967                         IWL_DEBUG_MAC80211(mvm,
2968                                            "skip invalid idx key programming during restart\n");
2969                         ret = 0;
2970                         break;
2971                 }
2972
2973                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2974                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key,
2975                                           test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2976                                                    &mvm->status));
2977                 if (ret) {
2978                         IWL_WARN(mvm, "set key failed\n");
2979                         /*
2980                          * can't add key for RX, but we don't need it
2981                          * in the device for TX so still return 0
2982                          */
2983                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2984                         ret = 0;
2985                 }
2986
2987                 break;
2988         case DISABLE_KEY:
2989                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2990                         ret = 0;
2991                         break;
2992                 }
2993
2994                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2995                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2996                 break;
2997         default:
2998                 ret = -EINVAL;
2999         }
3000
3001         mutex_unlock(&mvm->mutex);
3002         return ret;
3003 }
3004
3005 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
3006                                         struct ieee80211_vif *vif,
3007                                         struct ieee80211_key_conf *keyconf,
3008                                         struct ieee80211_sta *sta,
3009                                         u32 iv32, u16 *phase1key)
3010 {
3011         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3012
3013         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
3014                 return;
3015
3016         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
3017 }
3018
3019
3020 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
3021                                struct iwl_rx_packet *pkt, void *data)
3022 {
3023         struct iwl_mvm *mvm =
3024                 container_of(notif_wait, struct iwl_mvm, notif_wait);
3025         struct iwl_hs20_roc_res *resp;
3026         int resp_len = iwl_rx_packet_payload_len(pkt);
3027         struct iwl_mvm_time_event_data *te_data = data;
3028
3029         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
3030                 return true;
3031
3032         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
3033                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
3034                 return true;
3035         }
3036
3037         resp = (void *)pkt->data;
3038
3039         IWL_DEBUG_TE(mvm,
3040                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
3041                      resp->status, resp->event_unique_id);
3042
3043         te_data->uid = le32_to_cpu(resp->event_unique_id);
3044         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
3045                      te_data->uid);
3046
3047         spin_lock_bh(&mvm->time_event_lock);
3048         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
3049         spin_unlock_bh(&mvm->time_event_lock);
3050
3051         return true;
3052 }
3053
3054 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 200
3055 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
3056                                     struct ieee80211_channel *channel,
3057                                     struct ieee80211_vif *vif,
3058                                     int duration)
3059 {
3060         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
3061         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3062         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
3063         static const u16 time_event_response[] = { HOT_SPOT_CMD };
3064         struct iwl_notification_wait wait_time_event;
3065         struct iwl_hs20_roc_req aux_roc_req = {
3066                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
3067                 .id_and_color =
3068                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
3069                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
3070                 /* Set the channel info data */
3071                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
3072                         PHY_BAND_24 : PHY_BAND_5,
3073                 .channel_info.channel = channel->hw_value,
3074                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
3075                 /* Set the time and duration */
3076                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
3077                 .apply_time_max_delay =
3078                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
3079                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
3080          };
3081
3082         /* Set the node address */
3083         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3084
3085         lockdep_assert_held(&mvm->mutex);
3086
3087         spin_lock_bh(&mvm->time_event_lock);
3088
3089         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3090                 spin_unlock_bh(&mvm->time_event_lock);
3091                 return -EIO;
3092         }
3093
3094         te_data->vif = vif;
3095         te_data->duration = duration;
3096         te_data->id = HOT_SPOT_CMD;
3097
3098         spin_unlock_bh(&mvm->time_event_lock);
3099
3100         /*
3101          * Use a notification wait, which really just processes the
3102          * command response and doesn't wait for anything, in order
3103          * to be able to process the response and get the UID inside
3104          * the RX path. Using CMD_WANT_SKB doesn't work because it
3105          * stores the buffer and then wakes up this thread, by which
3106          * time another notification (that the time event started)
3107          * might already be processed unsuccessfully.
3108          */
3109         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3110                                    time_event_response,
3111                                    ARRAY_SIZE(time_event_response),
3112                                    iwl_mvm_rx_aux_roc, te_data);
3113
3114         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3115                                    &aux_roc_req);
3116
3117         if (res) {
3118                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3119                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3120                 goto out_clear_te;
3121         }
3122
3123         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3124         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3125         /* should never fail */
3126         WARN_ON_ONCE(res);
3127
3128         if (res) {
3129  out_clear_te:
3130                 spin_lock_bh(&mvm->time_event_lock);
3131                 iwl_mvm_te_clear_data(mvm, te_data);
3132                 spin_unlock_bh(&mvm->time_event_lock);
3133         }
3134
3135         return res;
3136 }
3137
3138 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3139                        struct ieee80211_vif *vif,
3140                        struct ieee80211_channel *channel,
3141                        int duration,
3142                        enum ieee80211_roc_type type)
3143 {
3144         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3145         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3146         struct cfg80211_chan_def chandef;
3147         struct iwl_mvm_phy_ctxt *phy_ctxt;
3148         int ret, i;
3149
3150         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3151                            duration, type);
3152
3153         flush_work(&mvm->roc_done_wk);
3154
3155         mutex_lock(&mvm->mutex);
3156
3157         switch (vif->type) {
3158         case NL80211_IFTYPE_STATION:
3159                 if (fw_has_capa(&mvm->fw->ucode_capa,
3160                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3161                         /* Use aux roc framework (HS20) */
3162                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3163                                                        vif, duration);
3164                         goto out_unlock;
3165                 }
3166                 IWL_ERR(mvm, "hotspot not supported\n");
3167                 ret = -EINVAL;
3168                 goto out_unlock;
3169         case NL80211_IFTYPE_P2P_DEVICE:
3170                 /* handle below */
3171                 break;
3172         default:
3173                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3174                 ret = -EINVAL;
3175                 goto out_unlock;
3176         }
3177
3178         for (i = 0; i < NUM_PHY_CTX; i++) {
3179                 phy_ctxt = &mvm->phy_ctxts[i];
3180                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3181                         continue;
3182
3183                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3184                         /*
3185                          * Unbind the P2P_DEVICE from the current PHY context,
3186                          * and if the PHY context is not used remove it.
3187                          */
3188                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3189                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3190                                 goto out_unlock;
3191
3192                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3193
3194                         /* Bind the P2P_DEVICE to the current PHY Context */
3195                         mvmvif->phy_ctxt = phy_ctxt;
3196
3197                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3198                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3199                                 goto out_unlock;
3200
3201                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3202                         goto schedule_time_event;
3203                 }
3204         }
3205
3206         /* Need to update the PHY context only if the ROC channel changed */
3207         if (channel == mvmvif->phy_ctxt->channel)
3208                 goto schedule_time_event;
3209
3210         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3211
3212         /*
3213          * Change the PHY context configuration as it is currently referenced
3214          * only by the P2P Device MAC
3215          */
3216         if (mvmvif->phy_ctxt->ref == 1) {
3217                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3218                                                &chandef, 1, 1);
3219                 if (ret)
3220                         goto out_unlock;
3221         } else {
3222                 /*
3223                  * The PHY context is shared with other MACs. Need to remove the
3224                  * P2P Device from the binding, allocate an new PHY context and
3225                  * create a new binding
3226                  */
3227                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3228                 if (!phy_ctxt) {
3229                         ret = -ENOSPC;
3230                         goto out_unlock;
3231                 }
3232
3233                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3234                                                1, 1);
3235                 if (ret) {
3236                         IWL_ERR(mvm, "Failed to change PHY context\n");
3237                         goto out_unlock;
3238                 }
3239
3240                 /* Unbind the P2P_DEVICE from the current PHY context */
3241                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3242                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3243                         goto out_unlock;
3244
3245                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3246
3247                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3248                 mvmvif->phy_ctxt = phy_ctxt;
3249
3250                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3251                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3252                         goto out_unlock;
3253
3254                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3255         }
3256
3257 schedule_time_event:
3258         /* Schedule the time events */
3259         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3260
3261 out_unlock:
3262         mutex_unlock(&mvm->mutex);
3263         IWL_DEBUG_MAC80211(mvm, "leave\n");
3264         return ret;
3265 }
3266
3267 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3268 {
3269         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3270
3271         IWL_DEBUG_MAC80211(mvm, "enter\n");
3272
3273         mutex_lock(&mvm->mutex);
3274         iwl_mvm_stop_roc(mvm);
3275         mutex_unlock(&mvm->mutex);
3276
3277         IWL_DEBUG_MAC80211(mvm, "leave\n");
3278         return 0;
3279 }
3280
3281 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3282                                  struct ieee80211_chanctx_conf *ctx)
3283 {
3284         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3285         struct iwl_mvm_phy_ctxt *phy_ctxt;
3286         int ret;
3287
3288         lockdep_assert_held(&mvm->mutex);
3289
3290         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3291
3292         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3293         if (!phy_ctxt) {
3294                 ret = -ENOSPC;
3295                 goto out;
3296         }
3297
3298         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3299                                        ctx->rx_chains_static,
3300                                        ctx->rx_chains_dynamic);
3301         if (ret) {
3302                 IWL_ERR(mvm, "Failed to add PHY context\n");
3303                 goto out;
3304         }
3305
3306         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3307         *phy_ctxt_id = phy_ctxt->id;
3308 out:
3309         return ret;
3310 }
3311
3312 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3313                                struct ieee80211_chanctx_conf *ctx)
3314 {
3315         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3316         int ret;
3317
3318         mutex_lock(&mvm->mutex);
3319         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3320         mutex_unlock(&mvm->mutex);
3321
3322         return ret;
3323 }
3324
3325 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3326                                      struct ieee80211_chanctx_conf *ctx)
3327 {
3328         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3329         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3330
3331         lockdep_assert_held(&mvm->mutex);
3332
3333         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3334 }
3335
3336 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3337                                    struct ieee80211_chanctx_conf *ctx)
3338 {
3339         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3340
3341         mutex_lock(&mvm->mutex);
3342         __iwl_mvm_remove_chanctx(mvm, ctx);
3343         mutex_unlock(&mvm->mutex);
3344 }
3345
3346 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3347                                    struct ieee80211_chanctx_conf *ctx,
3348                                    u32 changed)
3349 {
3350         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3351         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3352         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3353
3354         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3355                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3356                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3357                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3358                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3359                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3360                       phy_ctxt->ref, changed))
3361                 return;
3362
3363         mutex_lock(&mvm->mutex);
3364         iwl_mvm_bt_coex_vif_change(mvm);
3365         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3366                                  ctx->rx_chains_static,
3367                                  ctx->rx_chains_dynamic);
3368         mutex_unlock(&mvm->mutex);
3369 }
3370
3371 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3372                                         struct ieee80211_vif *vif,
3373                                         struct ieee80211_chanctx_conf *ctx,
3374                                         bool switching_chanctx)
3375 {
3376         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3377         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3378         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3379         int ret;
3380
3381         lockdep_assert_held(&mvm->mutex);
3382
3383         mvmvif->phy_ctxt = phy_ctxt;
3384
3385         switch (vif->type) {
3386         case NL80211_IFTYPE_AP:
3387                 /* only needed if we're switching chanctx (i.e. during CSA) */
3388                 if (switching_chanctx) {
3389                         mvmvif->ap_ibss_active = true;
3390                         break;
3391                 }
3392         case NL80211_IFTYPE_ADHOC:
3393                 /*
3394                  * The AP binding flow is handled as part of the start_ap flow
3395                  * (in bss_info_changed), similarly for IBSS.
3396                  */
3397                 ret = 0;
3398                 goto out;
3399         case NL80211_IFTYPE_STATION:
3400                 break;
3401         case NL80211_IFTYPE_MONITOR:
3402                 /* always disable PS when a monitor interface is active */
3403                 mvmvif->ps_disabled = true;
3404                 break;
3405         default:
3406                 ret = -EINVAL;
3407                 goto out;
3408         }
3409
3410         ret = iwl_mvm_binding_add_vif(mvm, vif);
3411         if (ret)
3412                 goto out;
3413
3414         /*
3415          * Power state must be updated before quotas,
3416          * otherwise fw will complain.
3417          */
3418         iwl_mvm_power_update_mac(mvm);
3419
3420         /* Setting the quota at this stage is only required for monitor
3421          * interfaces. For the other types, the bss_info changed flow
3422          * will handle quota settings.
3423          */
3424         if (vif->type == NL80211_IFTYPE_MONITOR) {
3425                 mvmvif->monitor_active = true;
3426                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3427                 if (ret)
3428                         goto out_remove_binding;
3429         }
3430
3431         /* Handle binding during CSA */
3432         if (vif->type == NL80211_IFTYPE_AP) {
3433                 iwl_mvm_update_quotas(mvm, false, NULL);
3434                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3435         }
3436
3437         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3438                 u32 duration = 2 * vif->bss_conf.beacon_int;
3439
3440                 /* iwl_mvm_protect_session() reads directly from the
3441                  * device (the system time), so make sure it is
3442                  * available.
3443                  */
3444                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3445                 if (ret)
3446                         goto out_remove_binding;
3447
3448                 /* Protect the session to make sure we hear the first
3449                  * beacon on the new channel.
3450                  */
3451                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3452                                         vif->bss_conf.beacon_int / 2,
3453                                         true);
3454
3455                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3456
3457                 iwl_mvm_update_quotas(mvm, false, NULL);
3458         }
3459
3460         goto out;
3461
3462 out_remove_binding:
3463         iwl_mvm_binding_remove_vif(mvm, vif);
3464         iwl_mvm_power_update_mac(mvm);
3465 out:
3466         if (ret)
3467                 mvmvif->phy_ctxt = NULL;
3468         return ret;
3469 }
3470 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3471                                       struct ieee80211_vif *vif,
3472                                       struct ieee80211_chanctx_conf *ctx)
3473 {
3474         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3475         int ret;
3476
3477         mutex_lock(&mvm->mutex);
3478         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3479         mutex_unlock(&mvm->mutex);
3480
3481         return ret;
3482 }
3483
3484 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3485                                            struct ieee80211_vif *vif,
3486                                            struct ieee80211_chanctx_conf *ctx,
3487                                            bool switching_chanctx)
3488 {
3489         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3490         struct ieee80211_vif *disabled_vif = NULL;
3491
3492         lockdep_assert_held(&mvm->mutex);
3493
3494         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3495
3496         switch (vif->type) {
3497         case NL80211_IFTYPE_ADHOC:
3498                 goto out;
3499         case NL80211_IFTYPE_MONITOR:
3500                 mvmvif->monitor_active = false;
3501                 mvmvif->ps_disabled = false;
3502                 break;
3503         case NL80211_IFTYPE_AP:
3504                 /* This part is triggered only during CSA */
3505                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3506                         goto out;
3507
3508                 mvmvif->csa_countdown = false;
3509
3510                 /* Set CS bit on all the stations */
3511                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3512
3513                 /* Save blocked iface, the timeout is set on the next beacon */
3514                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3515
3516                 mvmvif->ap_ibss_active = false;
3517                 break;
3518         case NL80211_IFTYPE_STATION:
3519                 if (!switching_chanctx)
3520                         break;
3521
3522                 disabled_vif = vif;
3523
3524                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3525                 break;
3526         default:
3527                 break;
3528         }
3529
3530         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3531         iwl_mvm_binding_remove_vif(mvm, vif);
3532
3533 out:
3534         mvmvif->phy_ctxt = NULL;
3535         iwl_mvm_power_update_mac(mvm);
3536 }
3537
3538 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3539                                          struct ieee80211_vif *vif,
3540                                          struct ieee80211_chanctx_conf *ctx)
3541 {
3542         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3543
3544         mutex_lock(&mvm->mutex);
3545         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3546         mutex_unlock(&mvm->mutex);
3547 }
3548
3549 static int
3550 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3551                                 struct ieee80211_vif_chanctx_switch *vifs)
3552 {
3553         int ret;
3554
3555         mutex_lock(&mvm->mutex);
3556         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3557         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3558
3559         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3560         if (ret) {
3561                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3562                 goto out_reassign;
3563         }
3564
3565         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3566                                            true);
3567         if (ret) {
3568                 IWL_ERR(mvm,
3569                         "failed to assign new_ctx during channel switch\n");
3570                 goto out_remove;
3571         }
3572
3573         /* we don't support TDLS during DCM - can be caused by channel switch */
3574         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3575                 iwl_mvm_teardown_tdls_peers(mvm);
3576
3577         goto out;
3578
3579 out_remove:
3580         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3581
3582 out_reassign:
3583         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3584                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3585                 goto out_restart;
3586         }
3587
3588         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3589                                          true)) {
3590                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3591                 goto out_restart;
3592         }
3593
3594         goto out;
3595
3596 out_restart:
3597         /* things keep failing, better restart the hw */
3598         iwl_mvm_nic_restart(mvm, false);
3599
3600 out:
3601         mutex_unlock(&mvm->mutex);
3602
3603         return ret;
3604 }
3605
3606 static int
3607 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3608                                     struct ieee80211_vif_chanctx_switch *vifs)
3609 {
3610         int ret;
3611
3612         mutex_lock(&mvm->mutex);
3613         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3614
3615         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3616                                            true);
3617         if (ret) {
3618                 IWL_ERR(mvm,
3619                         "failed to assign new_ctx during channel switch\n");
3620                 goto out_reassign;
3621         }
3622
3623         goto out;
3624
3625 out_reassign:
3626         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3627                                          true)) {
3628                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3629                 goto out_restart;
3630         }
3631
3632         goto out;
3633
3634 out_restart:
3635         /* things keep failing, better restart the hw */
3636         iwl_mvm_nic_restart(mvm, false);
3637
3638 out:
3639         mutex_unlock(&mvm->mutex);
3640
3641         return ret;
3642 }
3643
3644 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3645                                       struct ieee80211_vif_chanctx_switch *vifs,
3646                                       int n_vifs,
3647                                       enum ieee80211_chanctx_switch_mode mode)
3648 {
3649         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3650         int ret;
3651
3652         /* we only support a single-vif right now */
3653         if (n_vifs > 1)
3654                 return -EOPNOTSUPP;
3655
3656         switch (mode) {
3657         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3658                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3659                 break;
3660         case CHANCTX_SWMODE_REASSIGN_VIF:
3661                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3662                 break;
3663         default:
3664                 ret = -EOPNOTSUPP;
3665                 break;
3666         }
3667
3668         return ret;
3669 }
3670
3671 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3672                            struct ieee80211_sta *sta,
3673                            bool set)
3674 {
3675         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3676         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3677
3678         if (!mvm_sta || !mvm_sta->vif) {
3679                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3680                 return -EINVAL;
3681         }
3682
3683         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3684 }
3685
3686 #ifdef CONFIG_NL80211_TESTMODE
3687 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3688         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3689         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3690         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3691 };
3692
3693 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3694                                       struct ieee80211_vif *vif,
3695                                       void *data, int len)
3696 {
3697         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3698         int err;
3699         u32 noa_duration;
3700
3701         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3702         if (err)
3703                 return err;
3704
3705         if (!tb[IWL_MVM_TM_ATTR_CMD])
3706                 return -EINVAL;
3707
3708         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3709         case IWL_MVM_TM_CMD_SET_NOA:
3710                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3711                     !vif->bss_conf.enable_beacon ||
3712                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3713                         return -EINVAL;
3714
3715                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3716                 if (noa_duration >= vif->bss_conf.beacon_int)
3717                         return -EINVAL;
3718
3719                 mvm->noa_duration = noa_duration;
3720                 mvm->noa_vif = vif;
3721
3722                 return iwl_mvm_update_quotas(mvm, false, NULL);
3723         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3724                 /* must be associated client vif - ignore authorized */
3725                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3726                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3727                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3728                         return -EINVAL;
3729
3730                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3731                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3732                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3733         }
3734
3735         return -EOPNOTSUPP;
3736 }
3737
3738 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3739                                     struct ieee80211_vif *vif,
3740                                     void *data, int len)
3741 {
3742         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3743         int err;
3744
3745         mutex_lock(&mvm->mutex);
3746         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3747         mutex_unlock(&mvm->mutex);
3748
3749         return err;
3750 }
3751 #endif
3752
3753 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3754                                    struct ieee80211_vif *vif,
3755                                    struct ieee80211_channel_switch *chsw)
3756 {
3757         /* By implementing this operation, we prevent mac80211 from
3758          * starting its own channel switch timer, so that we can call
3759          * ieee80211_chswitch_done() ourselves at the right time
3760          * (which is when the absence time event starts).
3761          */
3762
3763         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3764                            "dummy channel switch op\n");
3765 }
3766
3767 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3768                                       struct ieee80211_vif *vif,
3769                                       struct ieee80211_channel_switch *chsw)
3770 {
3771         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3772         struct ieee80211_vif *csa_vif;
3773         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3774         u32 apply_time;
3775         int ret;
3776
3777         mutex_lock(&mvm->mutex);
3778
3779         mvmvif->csa_failed = false;
3780
3781         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3782                            chsw->chandef.center_freq1);
3783
3784         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3785
3786         switch (vif->type) {
3787         case NL80211_IFTYPE_AP:
3788                 csa_vif =
3789                         rcu_dereference_protected(mvm->csa_vif,
3790                                                   lockdep_is_held(&mvm->mutex));
3791                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3792                               "Another CSA is already in progress")) {
3793                         ret = -EBUSY;
3794                         goto out_unlock;
3795                 }
3796
3797                 rcu_assign_pointer(mvm->csa_vif, vif);
3798
3799                 if (WARN_ONCE(mvmvif->csa_countdown,
3800                               "Previous CSA countdown didn't complete")) {
3801                         ret = -EBUSY;
3802                         goto out_unlock;
3803                 }
3804
3805                 break;
3806         case NL80211_IFTYPE_STATION:
3807                 /* Schedule the time event to a bit before beacon 1,
3808                  * to make sure we're in the new channel when the
3809                  * GO/AP arrives.
3810                  */
3811                 apply_time = chsw->device_timestamp +
3812                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3813                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3814
3815                 if (chsw->block_tx)
3816                         iwl_mvm_csa_client_absent(mvm, vif);
3817
3818                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3819                                             apply_time);
3820                 if (mvmvif->bf_data.bf_enabled) {
3821                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3822                         if (ret)
3823                                 goto out_unlock;
3824                 }
3825
3826                 break;
3827         default:
3828                 break;
3829         }
3830
3831         mvmvif->ps_disabled = true;
3832
3833         ret = iwl_mvm_power_update_ps(mvm);
3834         if (ret)
3835                 goto out_unlock;
3836
3837         /* we won't be on this channel any longer */
3838         iwl_mvm_teardown_tdls_peers(mvm);
3839
3840 out_unlock:
3841         mutex_unlock(&mvm->mutex);
3842
3843         return ret;
3844 }
3845
3846 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3847                                        struct ieee80211_vif *vif)
3848 {
3849         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3850         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3851         int ret;
3852
3853         mutex_lock(&mvm->mutex);
3854
3855         if (mvmvif->csa_failed) {
3856                 mvmvif->csa_failed = false;
3857                 ret = -EIO;
3858                 goto out_unlock;
3859         }
3860
3861         if (vif->type == NL80211_IFTYPE_STATION) {
3862                 struct iwl_mvm_sta *mvmsta;
3863
3864                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3865                                                           mvmvif->ap_sta_id);
3866
3867                 if (WARN_ON(!mvmsta)) {
3868                         ret = -EIO;
3869                         goto out_unlock;
3870                 }
3871
3872                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3873
3874                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3875
3876                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3877                 if (ret)
3878                         goto out_unlock;
3879
3880                 iwl_mvm_stop_session_protection(mvm, vif);
3881         }
3882
3883         mvmvif->ps_disabled = false;
3884
3885         ret = iwl_mvm_power_update_ps(mvm);
3886
3887 out_unlock:
3888         mutex_unlock(&mvm->mutex);
3889
3890         return ret;
3891 }
3892
3893 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3894                               struct ieee80211_vif *vif, u32 queues, bool drop)
3895 {
3896         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3897         struct iwl_mvm_vif *mvmvif;
3898         struct iwl_mvm_sta *mvmsta;
3899         struct ieee80211_sta *sta;
3900         int i;
3901         u32 msk = 0;
3902
3903         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3904                 return;
3905
3906         mutex_lock(&mvm->mutex);
3907         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3908
3909         /* flush the AP-station and all TDLS peers */
3910         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3911                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3912                                                 lockdep_is_held(&mvm->mutex));
3913                 if (IS_ERR_OR_NULL(sta))
3914                         continue;
3915
3916                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3917                 if (mvmsta->vif != vif)
3918                         continue;
3919
3920                 /* make sure only TDLS peers or the AP are flushed */
3921                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3922
3923                 msk |= mvmsta->tfd_queue_msk;
3924         }
3925
3926         if (drop) {
3927                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3928                         IWL_ERR(mvm, "flush request fail\n");
3929                 mutex_unlock(&mvm->mutex);
3930         } else {
3931                 mutex_unlock(&mvm->mutex);
3932
3933                 /* this can take a while, and we may need/want other operations
3934                  * to succeed while doing this, so do it without the mutex held
3935                  */
3936                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3937         }
3938 }
3939
3940 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3941                                   struct survey_info *survey)
3942 {
3943         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3944         int ret;
3945
3946         memset(survey, 0, sizeof(*survey));
3947
3948         /* only support global statistics right now */
3949         if (idx != 0)
3950                 return -ENOENT;
3951
3952         if (fw_has_capa(&mvm->fw->ucode_capa,
3953                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3954                 return -ENOENT;
3955
3956         mutex_lock(&mvm->mutex);
3957
3958         if (mvm->ucode_loaded) {
3959                 ret = iwl_mvm_request_statistics(mvm, false);
3960                 if (ret)
3961                         goto out;
3962         }
3963
3964         survey->filled = SURVEY_INFO_TIME |
3965                          SURVEY_INFO_TIME_RX |
3966                          SURVEY_INFO_TIME_TX |
3967                          SURVEY_INFO_TIME_SCAN;
3968         survey->time = mvm->accu_radio_stats.on_time_rf +
3969                        mvm->radio_stats.on_time_rf;
3970         do_div(survey->time, USEC_PER_MSEC);
3971
3972         survey->time_rx = mvm->accu_radio_stats.rx_time +
3973                           mvm->radio_stats.rx_time;
3974         do_div(survey->time_rx, USEC_PER_MSEC);
3975
3976         survey->time_tx = mvm->accu_radio_stats.tx_time +
3977                           mvm->radio_stats.tx_time;
3978         do_div(survey->time_tx, USEC_PER_MSEC);
3979
3980         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3981                             mvm->radio_stats.on_time_scan;
3982         do_div(survey->time_scan, USEC_PER_MSEC);
3983
3984         ret = 0;
3985  out:
3986         mutex_unlock(&mvm->mutex);
3987         return ret;
3988 }
3989
3990 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3991                                        struct ieee80211_vif *vif,
3992                                        struct ieee80211_sta *sta,
3993                                        struct station_info *sinfo)
3994 {
3995         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3996         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3997         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3998
3999         if (fw_has_capa(&mvm->fw->ucode_capa,
4000                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
4001                 return;
4002
4003         /* if beacon filtering isn't on mac80211 does it anyway */
4004         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
4005                 return;
4006
4007         if (!vif->bss_conf.assoc)
4008                 return;
4009
4010         mutex_lock(&mvm->mutex);
4011
4012         if (mvmvif->ap_sta_id != mvmsta->sta_id)
4013                 goto unlock;
4014
4015         if (iwl_mvm_request_statistics(mvm, false))
4016                 goto unlock;
4017
4018         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
4019                            mvmvif->beacon_stats.accu_num_beacons;
4020         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
4021         if (mvmvif->beacon_stats.avg_signal) {
4022                 /* firmware only reports a value after RXing a few beacons */
4023                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
4024                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
4025         }
4026  unlock:
4027         mutex_unlock(&mvm->mutex);
4028 }
4029
4030 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4031                                         struct ieee80211_vif *vif,
4032                                         const struct ieee80211_event *event)
4033 {
4034 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4035         do {                                                    \
4036                 if ((_cnt) && --(_cnt))                         \
4037                         break;                                  \
4038                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4039         } while (0)
4040
4041         struct iwl_fw_dbg_trigger_tlv *trig;
4042         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4043
4044         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4045                 return;
4046
4047         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4048         trig_mlme = (void *)trig->data;
4049         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4050                 return;
4051
4052         if (event->u.mlme.data == ASSOC_EVENT) {
4053                 if (event->u.mlme.status == MLME_DENIED)
4054                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4055                                            trig_mlme->stop_assoc_denied,
4056                                            "DENIED ASSOC: reason %d",
4057                                             event->u.mlme.reason);
4058                 else if (event->u.mlme.status == MLME_TIMEOUT)
4059                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4060                                            trig_mlme->stop_assoc_timeout,
4061                                            "ASSOC TIMEOUT");
4062         } else if (event->u.mlme.data == AUTH_EVENT) {
4063                 if (event->u.mlme.status == MLME_DENIED)
4064                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4065                                            trig_mlme->stop_auth_denied,
4066                                            "DENIED AUTH: reason %d",
4067                                            event->u.mlme.reason);
4068                 else if (event->u.mlme.status == MLME_TIMEOUT)
4069                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4070                                            trig_mlme->stop_auth_timeout,
4071                                            "AUTH TIMEOUT");
4072         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4073                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4074                                    trig_mlme->stop_rx_deauth,
4075                                    "DEAUTH RX %d", event->u.mlme.reason);
4076         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4077                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4078                                    trig_mlme->stop_tx_deauth,
4079                                    "DEAUTH TX %d", event->u.mlme.reason);
4080         }
4081 #undef CHECK_MLME_TRIGGER
4082 }
4083
4084 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4085                                           struct ieee80211_vif *vif,
4086                                           const struct ieee80211_event *event)
4087 {
4088         struct iwl_fw_dbg_trigger_tlv *trig;
4089         struct iwl_fw_dbg_trigger_ba *ba_trig;
4090
4091         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4092                 return;
4093
4094         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4095         ba_trig = (void *)trig->data;
4096         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4097                 return;
4098
4099         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4100                 return;
4101
4102         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4103                                     "BAR received from %pM, tid %d, ssn %d",
4104                                     event->u.ba.sta->addr, event->u.ba.tid,
4105                                     event->u.ba.ssn);
4106 }
4107
4108 static void
4109 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4110                                      struct ieee80211_vif *vif,
4111                                      const struct ieee80211_event *event)
4112 {
4113         struct iwl_fw_dbg_trigger_tlv *trig;
4114         struct iwl_fw_dbg_trigger_ba *ba_trig;
4115
4116         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4117                 return;
4118
4119         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4120         ba_trig = (void *)trig->data;
4121         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4122                 return;
4123
4124         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4125                 return;
4126
4127         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4128                                     "Frame from %pM timed out, tid %d",
4129                                     event->u.ba.sta->addr, event->u.ba.tid);
4130 }
4131
4132 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4133                                        struct ieee80211_vif *vif,
4134                                        const struct ieee80211_event *event)
4135 {
4136         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4137
4138         switch (event->type) {
4139         case MLME_EVENT:
4140                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4141                 break;
4142         case BAR_RX_EVENT:
4143                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4144                 break;
4145         case BA_FRAME_TIMEOUT:
4146                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4147                 break;
4148         default:
4149                 break;
4150         }
4151 }
4152
4153 const struct ieee80211_ops iwl_mvm_hw_ops = {
4154         .tx = iwl_mvm_mac_tx,
4155         .ampdu_action = iwl_mvm_mac_ampdu_action,
4156         .start = iwl_mvm_mac_start,
4157         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4158         .stop = iwl_mvm_mac_stop,
4159         .add_interface = iwl_mvm_mac_add_interface,
4160         .remove_interface = iwl_mvm_mac_remove_interface,
4161         .config = iwl_mvm_mac_config,
4162         .prepare_multicast = iwl_mvm_prepare_multicast,
4163         .configure_filter = iwl_mvm_configure_filter,
4164         .bss_info_changed = iwl_mvm_bss_info_changed,
4165         .hw_scan = iwl_mvm_mac_hw_scan,
4166         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4167         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4168         .sta_state = iwl_mvm_mac_sta_state,
4169         .sta_notify = iwl_mvm_mac_sta_notify,
4170         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4171         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4172         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4173         .sta_rc_update = iwl_mvm_sta_rc_update,
4174         .conf_tx = iwl_mvm_mac_conf_tx,
4175         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4176         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4177         .flush = iwl_mvm_mac_flush,
4178         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4179         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4180         .set_key = iwl_mvm_mac_set_key,
4181         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4182         .remain_on_channel = iwl_mvm_roc,
4183         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4184         .add_chanctx = iwl_mvm_add_chanctx,
4185         .remove_chanctx = iwl_mvm_remove_chanctx,
4186         .change_chanctx = iwl_mvm_change_chanctx,
4187         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4188         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4189         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4190
4191         .start_ap = iwl_mvm_start_ap_ibss,
4192         .stop_ap = iwl_mvm_stop_ap_ibss,
4193         .join_ibss = iwl_mvm_start_ap_ibss,
4194         .leave_ibss = iwl_mvm_stop_ap_ibss,
4195
4196         .set_tim = iwl_mvm_set_tim,
4197
4198         .channel_switch = iwl_mvm_channel_switch,
4199         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4200         .post_channel_switch = iwl_mvm_post_channel_switch,
4201
4202         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4203         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4204         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4205
4206         .event_callback = iwl_mvm_mac_event_callback,
4207
4208         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4209
4210 #ifdef CONFIG_PM_SLEEP
4211         /* look at d3.c */
4212         .suspend = iwl_mvm_suspend,
4213         .resume = iwl_mvm_resume,
4214         .set_wakeup = iwl_mvm_set_wakeup,
4215         .set_rekey_data = iwl_mvm_set_rekey_data,
4216 #if IS_ENABLED(CONFIG_IPV6)
4217         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4218 #endif
4219         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4220 #endif
4221         .get_survey = iwl_mvm_mac_get_survey,
4222         .sta_statistics = iwl_mvm_mac_sta_statistics,
4223 };