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
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  21  * along with this program; if not, write to the Free Software
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
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  31  *
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
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  39  * modification, are permitted provided that the following conditions
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  43  *    notice, this list of conditions and the following disclaimer.
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  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  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,
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  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         hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
 576         hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
 577
 578         /*
 579          * the firmware uses u8 for num of iterations, but 0xff is saved for
 580          * infinite loop, so the maximum number of iterations is actually 254.
 581          */
 582         hw->wiphy->max_sched_scan_plan_iterations = 254;
 583
 584         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 585                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 586                                NL80211_FEATURE_P2P_GO_OPPPS |
 587                                NL80211_FEATURE_DYNAMIC_SMPS |
 588                                NL80211_FEATURE_STATIC_SMPS |
 589                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 590
 591         if (fw_has_capa(&mvm->fw->ucode_capa,
 592                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 593                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 594         if (fw_has_capa(&mvm->fw->ucode_capa,
 595                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 596                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 597
 598         if (fw_has_capa(&mvm->fw->ucode_capa,
 599                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 600                 hw->wiphy->features |=
 601                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 602
 603         if (fw_has_capa(&mvm->fw->ucode_capa,
 604                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 605                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 606
 607         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 608
 609 #ifdef CONFIG_PM_SLEEP
 610         if (iwl_mvm_is_d0i3_supported(mvm) &&
 611             device_can_wakeup(mvm->trans->dev)) {
 612                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 613                 hw->wiphy->wowlan = &mvm->wowlan;
 614         }
 615
 616         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 617             mvm->trans->ops->d3_suspend &&
 618             mvm->trans->ops->d3_resume &&
 619             device_can_wakeup(mvm->trans->dev)) {
 620                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 621                                      WIPHY_WOWLAN_DISCONNECT |
 622                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 623                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 624                                      WIPHY_WOWLAN_NET_DETECT;
 625                 if (!iwlwifi_mod_params.sw_crypto)
 626                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 627                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 628                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 629
 630                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 631                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 632                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 633                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 634                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 635                 hw->wiphy->wowlan = &mvm->wowlan;
 636         }
 637 #endif
 638
 639 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 640         /* assign default bcast filtering configuration */
 641         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 642 #endif
 643
 644         ret = iwl_mvm_leds_init(mvm);
 645         if (ret)
 646                 return ret;
 647
 648         if (fw_has_capa(&mvm->fw->ucode_capa,
 649                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 650                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 651                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 652                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 653         }
 654
 655         if (fw_has_capa(&mvm->fw->ucode_capa,
 656                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 657                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 658                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 659         }
 660
 661         hw->netdev_features |= mvm->cfg->features;
 662         if (!iwl_mvm_is_csum_supported(mvm))
 663                 hw->netdev_features &= ~NETIF_F_RXCSUM;
 664
 665         ret = ieee80211_register_hw(mvm->hw);
 666         if (ret)
 667                 iwl_mvm_leds_exit(mvm);
 668
 669         return ret;
 670 }
 671
 672 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 673                              struct ieee80211_sta *sta,
 674                              struct sk_buff *skb)
 675 {
 676         struct iwl_mvm_sta *mvmsta;
 677         bool defer = false;
 678
 679         /*
 680          * double check the IN_D0I3 flag both before and after
 681          * taking the spinlock, in order to prevent taking
 682          * the spinlock when not needed.
 683          */
 684         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 685                 return false;
 686
 687         spin_lock(&mvm->d0i3_tx_lock);
 688         /*
 689          * testing the flag again ensures the skb dequeue
 690          * loop (on d0i3 exit) hasn't run yet.
 691          */
 692         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 693                 goto out;
 694
 695         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 696         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 697             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 698                 goto out;
 699
 700         __skb_queue_tail(&mvm->d0i3_tx, skb);
 701         ieee80211_stop_queues(mvm->hw);
 702
 703         /* trigger wakeup */
 704         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 705         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 706
 707         defer = true;
 708 out:
 709         spin_unlock(&mvm->d0i3_tx_lock);
 710         return defer;
 711 }
 712
 713 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 714                            struct ieee80211_tx_control *control,
 715                            struct sk_buff *skb)
 716 {
 717         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 718         struct ieee80211_sta *sta = control->sta;
 719         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 720         struct ieee80211_hdr *hdr = (void *)skb->data;
 721
 722         if (iwl_mvm_is_radio_killed(mvm)) {
 723                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 724                 goto drop;
 725         }
 726
 727         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 728             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 729             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 730                 goto drop;
 731
 732         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 733         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 734                      ieee80211_is_mgmt(hdr->frame_control) &&
 735                      !ieee80211_is_deauth(hdr->frame_control) &&
 736                      !ieee80211_is_disassoc(hdr->frame_control) &&
 737                      !ieee80211_is_action(hdr->frame_control)))
 738                 sta = NULL;
 739
 740         if (sta) {
 741                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 742                         return;
 743                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 744                         goto drop;
 745                 return;
 746         }
 747
 748         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 749                 goto drop;
 750         return;
 751  drop:
 752         ieee80211_free_txskb(hw, skb);
 753 }
 754
 755 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 756 {
 757         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 758                 return false;
 759         return true;
 760 }
 761
 762 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 763 {
 764         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 765                 return false;
 766         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 767                 return true;
 768
 769         /* enabled by default */
 770         return true;
 771 }
 772
 773 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 774         do {                                                    \
 775                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 776                         break;                                  \
 777                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 778         } while (0)
 779
 780 static void
 781 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 782                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 783                             enum ieee80211_ampdu_mlme_action action)
 784 {
 785         struct iwl_fw_dbg_trigger_tlv *trig;
 786         struct iwl_fw_dbg_trigger_ba *ba_trig;
 787
 788         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 789                 return;
 790
 791         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 792         ba_trig = (void *)trig->data;
 793
 794         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 795                 return;
 796
 797         switch (action) {
 798         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 799                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 800                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 801
 802                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 803                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 804                                  sta->addr, tid, tid_data->ssn);
 805                 break;
 806                 }
 807         case IEEE80211_AMPDU_TX_STOP_CONT:
 808                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 809                                  "TX AGG STOP: MAC %pM tid %d\n",
 810                                  sta->addr, tid);
 811                 break;
 812         case IEEE80211_AMPDU_RX_START:
 813                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 814                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 815                                  sta->addr, tid, rx_ba_ssn);
 816                 break;
 817         case IEEE80211_AMPDU_RX_STOP:
 818                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 819                                  "RX AGG STOP: MAC %pM tid %d\n",
 820                                  sta->addr, tid);
 821                 break;
 822         default:
 823                 break;
 824         }
 825 }
 826
 827 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 828                                     struct ieee80211_vif *vif,
 829                                     struct ieee80211_ampdu_params *params)
 830 {
 831         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 832         int ret;
 833         bool tx_agg_ref = false;
 834         struct ieee80211_sta *sta = params->sta;
 835         enum ieee80211_ampdu_mlme_action action = params->action;
 836         u16 tid = params->tid;
 837         u16 *ssn = &params->ssn;
 838         u8 buf_size = params->buf_size;
 839
 840         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 841                      sta->addr, tid, action);
 842
 843         if (!(mvm->nvm_data->sku_cap_11n_enable))
 844                 return -EACCES;
 845
 846         /* return from D0i3 before starting a new Tx aggregation */
 847         switch (action) {
 848         case IEEE80211_AMPDU_TX_START:
 849         case IEEE80211_AMPDU_TX_STOP_CONT:
 850         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 851         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 852         case IEEE80211_AMPDU_TX_OPERATIONAL:
 853                 /*
 854                  * for tx start, wait synchronously until D0i3 exit to
 855                  * get the correct sequence number for the tid.
 856                  * additionally, some other ampdu actions use direct
 857                  * target access, which is not handled automatically
 858                  * by the trans layer (unlike commands), so wait for
 859                  * d0i3 exit in these cases as well.
 860                  */
 861                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 862                 if (ret)
 863                         return ret;
 864
 865                 tx_agg_ref = true;
 866                 break;
 867         default:
 868                 break;
 869         }
 870
 871         mutex_lock(&mvm->mutex);
 872
 873         switch (action) {
 874         case IEEE80211_AMPDU_RX_START:
 875                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 876                         ret = -EINVAL;
 877                         break;
 878                 }
 879                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 880                 break;
 881         case IEEE80211_AMPDU_RX_STOP:
 882                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 883                 break;
 884         case IEEE80211_AMPDU_TX_START:
 885                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 886                         ret = -EINVAL;
 887                         break;
 888                 }
 889                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 890                 break;
 891         case IEEE80211_AMPDU_TX_STOP_CONT:
 892                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 893                 break;
 894         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 895         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 896                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 897                 break;
 898         case IEEE80211_AMPDU_TX_OPERATIONAL:
 899                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 900                 break;
 901         default:
 902                 WARN_ON_ONCE(1);
 903                 ret = -EINVAL;
 904                 break;
 905         }
 906
 907         if (!ret) {
 908                 u16 rx_ba_ssn = 0;
 909
 910                 if (action == IEEE80211_AMPDU_RX_START)
 911                         rx_ba_ssn = *ssn;
 912
 913                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 914                                             rx_ba_ssn, action);
 915         }
 916         mutex_unlock(&mvm->mutex);
 917
 918         /*
 919          * If the tid is marked as started, we won't use it for offloaded
 920          * traffic on the next D0i3 entry. It's safe to unref.
 921          */
 922         if (tx_agg_ref)
 923                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 924
 925         return ret;
 926 }
 927
 928 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 929                                      struct ieee80211_vif *vif)
 930 {
 931         struct iwl_mvm *mvm = data;
 932         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 933
 934         mvmvif->uploaded = false;
 935         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 936
 937         spin_lock_bh(&mvm->time_event_lock);
 938         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 939         spin_unlock_bh(&mvm->time_event_lock);
 940
 941         mvmvif->phy_ctxt = NULL;
 942         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 943 }
 944
 945 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 946                                      const void *data, size_t datalen)
 947 {
 948         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 949         ssize_t bytes_read;
 950         ssize_t bytes_read_trans;
 951
 952         if (offset < dump_ptrs->op_mode_len) {
 953                 bytes_read = min_t(ssize_t, count,
 954                                    dump_ptrs->op_mode_len - offset);
 955                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 956                        bytes_read);
 957                 offset += bytes_read;
 958                 count -= bytes_read;
 959
 960                 if (count == 0)
 961                         return bytes_read;
 962         } else {
 963                 bytes_read = 0;
 964         }
 965
 966         if (!dump_ptrs->trans_ptr)
 967                 return bytes_read;
 968
 969         offset -= dump_ptrs->op_mode_len;
 970         bytes_read_trans = min_t(ssize_t, count,
 971                                  dump_ptrs->trans_ptr->len - offset);
 972         memcpy(buffer + bytes_read,
 973                (u8 *)dump_ptrs->trans_ptr->data + offset,
 974                bytes_read_trans);
 975
 976         return bytes_read + bytes_read_trans;
 977 }
 978
 979 static void iwl_mvm_free_coredump(const void *data)
 980 {
 981         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 982
 983         vfree(fw_error_dump->op_mode_ptr);
 984         vfree(fw_error_dump->trans_ptr);
 985         kfree(fw_error_dump);
 986 }
 987
 988 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 989                                struct iwl_fw_error_dump_data **dump_data)
 990 {
 991         struct iwl_fw_error_dump_fifo *fifo_hdr;
 992         u32 *fifo_data;
 993         u32 fifo_len;
 994         unsigned long flags;
 995         int i, j;
 996
 997         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 998                 return;
 999
1000         /* Pull RXF data from all RXFs */
1001         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
1002                 /*
1003                  * Keep aside the additional offset that might be needed for
1004                  * next RXF
1005                  */
1006                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
1007
1008                 fifo_hdr = (void *)(*dump_data)->data;
1009                 fifo_data = (void *)fifo_hdr->data;
1010                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
1011
1012                 /* No need to try to read the data if the length is 0 */
1013                 if (fifo_len == 0)
1014                         continue;
1015
1016                 /* Add a TLV for the RXF */
1017                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
1018                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1019
1020                 fifo_hdr->fifo_num = cpu_to_le32(i);
1021                 fifo_hdr->available_bytes =
1022                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1023                                                         RXF_RD_D_SPACE +
1024                                                         offset_diff));
1025                 fifo_hdr->wr_ptr =
1026                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1027                                                         RXF_RD_WR_PTR +
1028                                                         offset_diff));
1029                 fifo_hdr->rd_ptr =
1030                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1031                                                         RXF_RD_RD_PTR +
1032                                                         offset_diff));
1033                 fifo_hdr->fence_ptr =
1034                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1035                                                         RXF_RD_FENCE_PTR +
1036                                                         offset_diff));
1037                 fifo_hdr->fence_mode =
1038                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1039                                                         RXF_SET_FENCE_MODE +
1040                                                         offset_diff));
1041
1042                 /* Lock fence */
1043                 iwl_trans_write_prph(mvm->trans,
1044                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
1045                 /* Set fence pointer to the same place like WR pointer */
1046                 iwl_trans_write_prph(mvm->trans,
1047                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
1048                 /* Set fence offset */
1049                 iwl_trans_write_prph(mvm->trans,
1050                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
1051                                      0x0);
1052
1053                 /* Read FIFO */
1054                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1055                 for (j = 0; j < fifo_len; j++)
1056                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1057                                                          RXF_FIFO_RD_FENCE_INC +
1058                                                          offset_diff);
1059                 *dump_data = iwl_fw_error_next_data(*dump_data);
1060         }
1061
1062         /* Pull TXF data from all TXFs */
1063         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
1064                 /* Mark the number of TXF we're pulling now */
1065                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
1066
1067                 fifo_hdr = (void *)(*dump_data)->data;
1068                 fifo_data = (void *)fifo_hdr->data;
1069                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
1070
1071                 /* No need to try to read the data if the length is 0 */
1072                 if (fifo_len == 0)
1073                         continue;
1074
1075                 /* Add a TLV for the FIFO */
1076                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
1077                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1078
1079                 fifo_hdr->fifo_num = cpu_to_le32(i);
1080                 fifo_hdr->available_bytes =
1081                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1082                                                         TXF_FIFO_ITEM_CNT));
1083                 fifo_hdr->wr_ptr =
1084                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1085                                                         TXF_WR_PTR));
1086                 fifo_hdr->rd_ptr =
1087                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1088                                                         TXF_RD_PTR));
1089                 fifo_hdr->fence_ptr =
1090                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1091                                                         TXF_FENCE_PTR));
1092                 fifo_hdr->fence_mode =
1093                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1094                                                         TXF_LOCK_FENCE));
1095
1096                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
1097                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
1098                                      TXF_WR_PTR);
1099
1100                 /* Dummy-read to advance the read pointer to the head */
1101                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
1102
1103                 /* Read FIFO */
1104                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1105                 for (j = 0; j < fifo_len; j++)
1106                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1107                                                           TXF_READ_MODIFY_DATA);
1108                 *dump_data = iwl_fw_error_next_data(*dump_data);
1109         }
1110
1111         iwl_trans_release_nic_access(mvm->trans, &flags);
1112 }
1113
1114 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1115 {
1116         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1117             !mvm->fw_dump_desc)
1118                 return;
1119
1120         kfree(mvm->fw_dump_desc);
1121         mvm->fw_dump_desc = NULL;
1122 }
1123
1124 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1125 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1126
1127 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1128 {
1129         struct iwl_fw_error_dump_file *dump_file;
1130         struct iwl_fw_error_dump_data *dump_data;
1131         struct iwl_fw_error_dump_info *dump_info;
1132         struct iwl_fw_error_dump_mem *dump_mem;
1133         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1134         struct iwl_mvm_dump_ptrs *fw_error_dump;
1135         u32 sram_len, sram_ofs;
1136         u32 file_len, fifo_data_len = 0;
1137         u32 smem_len = mvm->cfg->smem_len;
1138         u32 sram2_len = mvm->cfg->dccm2_len;
1139         bool monitor_dump_only = false;
1140
1141         lockdep_assert_held(&mvm->mutex);
1142
1143         /* there's no point in fw dump if the bus is dead */
1144         if (test_bit(STATUS_TRANS_DEAD, &mvm->trans->status)) {
1145                 IWL_ERR(mvm, "Skip fw error dump since bus is dead\n");
1146                 return;
1147         }
1148
1149         if (mvm->fw_dump_trig &&
1150             mvm->fw_dump_trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
1151                 monitor_dump_only = true;
1152
1153         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1154         if (!fw_error_dump)
1155                 return;
1156
1157         /* SRAM - include stack CCM if driver knows the values for it */
1158         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1159                 const struct fw_img *img;
1160
1161                 img = &mvm->fw->img[mvm->cur_ucode];
1162                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1163                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1164         } else {
1165                 sram_ofs = mvm->cfg->dccm_offset;
1166                 sram_len = mvm->cfg->dccm_len;
1167         }
1168
1169         /* reading RXF/TXF sizes */
1170         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1171                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1172                 int i;
1173
1174                 fifo_data_len = 0;
1175
1176                 /* Count RXF size */
1177                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1178                         if (!mem_cfg->rxfifo_size[i])
1179                                 continue;
1180
1181                         /* Add header info */
1182                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1183                                          sizeof(*dump_data) +
1184                                          sizeof(struct iwl_fw_error_dump_fifo);
1185                 }
1186
1187                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1188                         if (!mem_cfg->txfifo_size[i])
1189                                 continue;
1190
1191                         /* Add header info */
1192                         fifo_data_len += mem_cfg->txfifo_size[i] +
1193                                          sizeof(*dump_data) +
1194                                          sizeof(struct iwl_fw_error_dump_fifo);
1195                 }
1196         }
1197
1198         file_len = sizeof(*dump_file) +
1199                    sizeof(*dump_data) * 2 +
1200                    sram_len + sizeof(*dump_mem) +
1201                    fifo_data_len +
1202                    sizeof(*dump_info);
1203
1204         /* Make room for the SMEM, if it exists */
1205         if (smem_len)
1206                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1207
1208         /* Make room for the secondary SRAM, if it exists */
1209         if (sram2_len)
1210                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1211
1212         /* Make room for fw's virtual image pages, if it exists */
1213         if (mvm->fw->img[mvm->cur_ucode].paging_mem_size)
1214                 file_len += mvm->num_of_paging_blk *
1215                         (sizeof(*dump_data) +
1216                          sizeof(struct iwl_fw_error_dump_paging) +
1217                          PAGING_BLOCK_SIZE);
1218
1219         /* If we only want a monitor dump, reset the file length */
1220         if (monitor_dump_only) {
1221                 file_len = sizeof(*dump_file) + sizeof(*dump_data) +
1222                            sizeof(*dump_info);
1223         }
1224
1225         /*
1226          * In 8000 HW family B-step include the ICCM (which resides separately)
1227          */
1228         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1229             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1230                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1231                             IWL8260_ICCM_LEN;
1232
1233         if (mvm->fw_dump_desc)
1234                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1235                             mvm->fw_dump_desc->len;
1236
1237         dump_file = vzalloc(file_len);
1238         if (!dump_file) {
1239                 kfree(fw_error_dump);
1240                 iwl_mvm_free_fw_dump_desc(mvm);
1241                 return;
1242         }
1243
1244         fw_error_dump->op_mode_ptr = dump_file;
1245
1246         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1247         dump_data = (void *)dump_file->data;
1248
1249         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1250         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1251         dump_info = (void *) dump_data->data;
1252         dump_info->device_family =
1253                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1254                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1255                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1256         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1257         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1258                sizeof(dump_info->fw_human_readable));
1259         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1260                 sizeof(dump_info->dev_human_readable));
1261         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1262                 sizeof(dump_info->bus_human_readable));
1263
1264         dump_data = iwl_fw_error_next_data(dump_data);
1265         /* We only dump the FIFOs if the FW is in error state */
1266         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1267                 iwl_mvm_dump_fifos(mvm, &dump_data);
1268
1269         if (mvm->fw_dump_desc) {
1270                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1271                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1272                                              mvm->fw_dump_desc->len);
1273                 dump_trig = (void *)dump_data->data;
1274                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1275                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1276
1277                 /* now we can free this copy */
1278                 iwl_mvm_free_fw_dump_desc(mvm);
1279                 dump_data = iwl_fw_error_next_data(dump_data);
1280         }
1281
1282         /* In case we only want monitor dump, skip to dump trasport data */
1283         if (monitor_dump_only)
1284                 goto dump_trans_data;
1285
1286         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1287         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1288         dump_mem = (void *)dump_data->data;
1289         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1290         dump_mem->offset = cpu_to_le32(sram_ofs);
1291         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1292                                  sram_len);
1293
1294         if (smem_len) {
1295                 dump_data = iwl_fw_error_next_data(dump_data);
1296                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1297                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1298                 dump_mem = (void *)dump_data->data;
1299                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1300                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1301                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1302                                          dump_mem->data, smem_len);
1303         }
1304
1305         if (sram2_len) {
1306                 dump_data = iwl_fw_error_next_data(dump_data);
1307                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1308                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1309                 dump_mem = (void *)dump_data->data;
1310                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1311                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1312                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1313                                          dump_mem->data, sram2_len);
1314         }
1315
1316         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1317             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1318                 dump_data = iwl_fw_error_next_data(dump_data);
1319                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1320                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1321                                              sizeof(*dump_mem));
1322                 dump_mem = (void *)dump_data->data;
1323                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1324                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1325                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1326                                          dump_mem->data, IWL8260_ICCM_LEN);
1327         }
1328
1329         /* Dump fw's virtual image */
1330         if (mvm->fw->img[mvm->cur_ucode].paging_mem_size) {
1331                 u32 i;
1332
1333                 for (i = 1; i < mvm->num_of_paging_blk + 1; i++) {
1334                         struct iwl_fw_error_dump_paging *paging;
1335                         struct page *pages =
1336                                 mvm->fw_paging_db[i].fw_paging_block;
1337
1338                         dump_data = iwl_fw_error_next_data(dump_data);
1339                         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
1340                         dump_data->len = cpu_to_le32(sizeof(*paging) +
1341                                                      PAGING_BLOCK_SIZE);
1342                         paging = (void *)dump_data->data;
1343                         paging->index = cpu_to_le32(i);
1344                         memcpy(paging->data, page_address(pages),
1345                                PAGING_BLOCK_SIZE);
1346                 }
1347         }
1348
1349 dump_trans_data:
1350         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,
1351                                                        mvm->fw_dump_trig);
1352         fw_error_dump->op_mode_len = file_len;
1353         if (fw_error_dump->trans_ptr)
1354                 file_len += fw_error_dump->trans_ptr->len;
1355         dump_file->file_len = cpu_to_le32(file_len);
1356
1357         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1358                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1359
1360         mvm->fw_dump_trig = NULL;
1361         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1362 }
1363
1364 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1365         .trig_desc = {
1366                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1367         },
1368 };
1369
1370 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1371 {
1372         /* clear the D3 reconfig, we only need it to avoid dumping a
1373          * firmware coredump on reconfiguration, we shouldn't do that
1374          * on D3->D0 transition
1375          */
1376         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1377                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1378                 iwl_mvm_fw_error_dump(mvm);
1379         }
1380
1381         /* cleanup all stale references (scan, roc), but keep the
1382          * ucode_down ref until reconfig is complete
1383          */
1384         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1385
1386         iwl_trans_stop_device(mvm->trans);
1387
1388         mvm->scan_status = 0;
1389         mvm->ps_disabled = false;
1390         mvm->calibrating = false;
1391
1392         /* just in case one was running */
1393         ieee80211_remain_on_channel_expired(mvm->hw);
1394
1395         /*
1396          * cleanup all interfaces, even inactive ones, as some might have
1397          * gone down during the HW restart
1398          */
1399         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1400
1401         mvm->p2p_device_vif = NULL;
1402         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1403
1404         iwl_mvm_reset_phy_ctxts(mvm);
1405         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1406         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1407         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1408         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1409         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1410         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1411         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1412         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1413
1414         ieee80211_wake_queues(mvm->hw);
1415
1416         /* clear any stale d0i3 state */
1417         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1418
1419         mvm->vif_count = 0;
1420         mvm->rx_ba_sessions = 0;
1421         mvm->fw_dbg_conf = FW_DBG_INVALID;
1422
1423         /* keep statistics ticking */
1424         iwl_mvm_accu_radio_stats(mvm);
1425 }
1426
1427 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1428 {
1429         int ret;
1430
1431         lockdep_assert_held(&mvm->mutex);
1432
1433         /* Clean up some internal and mac80211 state on restart */
1434         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1435                 iwl_mvm_restart_cleanup(mvm);
1436
1437         ret = iwl_mvm_up(mvm);
1438
1439         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1440                 /* Something went wrong - we need to finish some cleanup
1441                  * that normally iwl_mvm_mac_restart_complete() below
1442                  * would do.
1443                  */
1444                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1445                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1446         }
1447
1448         return ret;
1449 }
1450
1451 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1452 {
1453         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1454         int ret;
1455
1456         /* Some hw restart cleanups must not hold the mutex */
1457         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1458                 /*
1459                  * Make sure we are out of d0i3. This is needed
1460                  * to make sure the reference accounting is correct
1461                  * (and there is no stale d0i3_exit_work).
1462                  */
1463                 wait_event_timeout(mvm->d0i3_exit_waitq,
1464                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1465                                              &mvm->status),
1466                                    HZ);
1467         }
1468
1469         mutex_lock(&mvm->mutex);
1470         ret = __iwl_mvm_mac_start(mvm);
1471         mutex_unlock(&mvm->mutex);
1472
1473         return ret;
1474 }
1475
1476 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1477 {
1478         int ret;
1479
1480         mutex_lock(&mvm->mutex);
1481
1482         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1483         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1484         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1485         if (ret)
1486                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1487                         ret);
1488
1489         /* allow transport/FW low power modes */
1490         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1491
1492         /*
1493          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1494          * of packets the FW sent out, so we must reconnect.
1495          */
1496         iwl_mvm_teardown_tdls_peers(mvm);
1497
1498         mutex_unlock(&mvm->mutex);
1499 }
1500
1501 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1502 {
1503         if (!iwl_mvm_is_d0i3_supported(mvm))
1504                 return;
1505
1506         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1507                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1508                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1509                                                   &mvm->status),
1510                                         HZ))
1511                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1512 }
1513
1514 static void
1515 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1516                               enum ieee80211_reconfig_type reconfig_type)
1517 {
1518         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1519
1520         switch (reconfig_type) {
1521         case IEEE80211_RECONFIG_TYPE_RESTART:
1522                 iwl_mvm_restart_complete(mvm);
1523                 break;
1524         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1525                 iwl_mvm_resume_complete(mvm);
1526                 break;
1527         }
1528 }
1529
1530 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1531 {
1532         lockdep_assert_held(&mvm->mutex);
1533
1534         /* firmware counters are obviously reset now, but we shouldn't
1535          * partially track so also clear the fw_reset_accu counters.
1536          */
1537         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1538
1539         /*
1540          * Disallow low power states when the FW is down by taking
1541          * the UCODE_DOWN ref. in case of ongoing hw restart the
1542          * ref is already taken, so don't take it again.
1543          */
1544         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1545                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1546
1547         /* async_handlers_wk is now blocked */
1548
1549         /*
1550          * The work item could be running or queued if the
1551          * ROC time event stops just as we get here.
1552          */
1553         flush_work(&mvm->roc_done_wk);
1554
1555         iwl_trans_stop_device(mvm->trans);
1556
1557         iwl_mvm_async_handlers_purge(mvm);
1558         /* async_handlers_list is empty and will stay empty: HW is stopped */
1559
1560         /* the fw is stopped, the aux sta is dead: clean up driver state */
1561         iwl_mvm_del_aux_sta(mvm);
1562
1563         iwl_free_fw_paging(mvm);
1564
1565         /*
1566          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1567          * won't be called in this case).
1568          * But make sure to cleanup interfaces that have gone down before/during
1569          * HW restart was requested.
1570          */
1571         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1572                 ieee80211_iterate_interfaces(mvm->hw, 0,
1573                                              iwl_mvm_cleanup_iterator, mvm);
1574
1575         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1576          * make sure there's nothing left there and warn if any is found.
1577          */
1578         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1579                 int i;
1580
1581                 for (i = 0; i < mvm->max_scans; i++) {
1582                         if (WARN_ONCE(mvm->scan_uid_status[i],
1583                                       "UMAC scan UID %d status was not cleaned\n",
1584                                       i))
1585                                 mvm->scan_uid_status[i] = 0;
1586                 }
1587         }
1588
1589         mvm->ucode_loaded = false;
1590 }
1591
1592 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1593 {
1594         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1595
1596         flush_work(&mvm->d0i3_exit_work);
1597         flush_work(&mvm->async_handlers_wk);
1598         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1599         iwl_mvm_free_fw_dump_desc(mvm);
1600
1601         mutex_lock(&mvm->mutex);
1602         __iwl_mvm_mac_stop(mvm);
1603         mutex_unlock(&mvm->mutex);
1604
1605         /*
1606          * The worker might have been waiting for the mutex, let it run and
1607          * discover that its list is now empty.
1608          */
1609         cancel_work_sync(&mvm->async_handlers_wk);
1610 }
1611
1612 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1613 {
1614         u16 i;
1615
1616         lockdep_assert_held(&mvm->mutex);
1617
1618         for (i = 0; i < NUM_PHY_CTX; i++)
1619                 if (!mvm->phy_ctxts[i].ref)
1620                         return &mvm->phy_ctxts[i];
1621
1622         IWL_ERR(mvm, "No available PHY context\n");
1623         return NULL;
1624 }
1625
1626 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1627                                 s16 tx_power)
1628 {
1629         struct iwl_dev_tx_power_cmd cmd = {
1630                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1631                 .v2.mac_context_id =
1632                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1633                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1634         };
1635         int len = sizeof(cmd);
1636
1637         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1638                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1639
1640         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1641                 len = sizeof(cmd.v2);
1642
1643         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1644 }
1645
1646 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1647                                      struct ieee80211_vif *vif)
1648 {
1649         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1650         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1651         int ret;
1652
1653         mvmvif->mvm = mvm;
1654
1655         /*
1656          * make sure D0i3 exit is completed, otherwise a target access
1657          * during tx queue configuration could be done when still in
1658          * D0i3 state.
1659          */
1660         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1661         if (ret)
1662                 return ret;
1663
1664         /*
1665          * Not much to do here. The stack will not allow interface
1666          * types or combinations that we didn't advertise, so we
1667          * don't really have to check the types.
1668          */
1669
1670         mutex_lock(&mvm->mutex);
1671
1672         /* make sure that beacon statistics don't go backwards with FW reset */
1673         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1674                 mvmvif->beacon_stats.accu_num_beacons +=
1675                         mvmvif->beacon_stats.num_beacons;
1676
1677         /* Allocate resources for the MAC context, and add it to the fw  */
1678         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1679         if (ret)
1680                 goto out_unlock;
1681
1682         /* Counting number of interfaces is needed for legacy PM */
1683         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1684                 mvm->vif_count++;
1685
1686         /*
1687          * The AP binding flow can be done only after the beacon
1688          * template is configured (which happens only in the mac80211
1689          * start_ap() flow), and adding the broadcast station can happen
1690          * only after the binding.
1691          * In addition, since modifying the MAC before adding a bcast
1692          * station is not allowed by the FW, delay the adding of MAC context to
1693          * the point where we can also add the bcast station.
1694          * In short: there's not much we can do at this point, other than
1695          * allocating resources :)
1696          */
1697         if (vif->type == NL80211_IFTYPE_AP ||
1698             vif->type == NL80211_IFTYPE_ADHOC) {
1699                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1700                 if (ret) {
1701                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1702                         goto out_release;
1703                 }
1704
1705                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1706                 goto out_unlock;
1707         }
1708
1709         mvmvif->features |= hw->netdev_features;
1710
1711         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1712         if (ret)
1713                 goto out_release;
1714
1715         ret = iwl_mvm_power_update_mac(mvm);
1716         if (ret)
1717                 goto out_remove_mac;
1718
1719         /* beacon filtering */
1720         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1721         if (ret)
1722                 goto out_remove_mac;
1723
1724         if (!mvm->bf_allowed_vif &&
1725             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1726                 mvm->bf_allowed_vif = mvmvif;
1727                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1728                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1729         }
1730
1731         /*
1732          * P2P_DEVICE interface does not have a channel context assigned to it,
1733          * so a dedicated PHY context is allocated to it and the corresponding
1734          * MAC context is bound to it at this stage.
1735          */
1736         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1737
1738                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1739                 if (!mvmvif->phy_ctxt) {
1740                         ret = -ENOSPC;
1741                         goto out_free_bf;
1742                 }
1743
1744                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1745                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1746                 if (ret)
1747                         goto out_unref_phy;
1748
1749                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1750                 if (ret)
1751                         goto out_unbind;
1752
1753                 /* Save a pointer to p2p device vif, so it can later be used to
1754                  * update the p2p device MAC when a GO is started/stopped */
1755                 mvm->p2p_device_vif = vif;
1756         }
1757
1758         iwl_mvm_vif_dbgfs_register(mvm, vif);
1759         goto out_unlock;
1760
1761  out_unbind:
1762         iwl_mvm_binding_remove_vif(mvm, vif);
1763  out_unref_phy:
1764         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1765  out_free_bf:
1766         if (mvm->bf_allowed_vif == mvmvif) {
1767                 mvm->bf_allowed_vif = NULL;
1768                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1769                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1770         }
1771  out_remove_mac:
1772         mvmvif->phy_ctxt = NULL;
1773         iwl_mvm_mac_ctxt_remove(mvm, vif);
1774  out_release:
1775         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1776                 mvm->vif_count--;
1777
1778         iwl_mvm_mac_ctxt_release(mvm, vif);
1779  out_unlock:
1780         mutex_unlock(&mvm->mutex);
1781
1782         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1783
1784         return ret;
1785 }
1786
1787 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1788                                         struct ieee80211_vif *vif)
1789 {
1790         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1791
1792         if (tfd_msk) {
1793                 /*
1794                  * mac80211 first removes all the stations of the vif and
1795                  * then removes the vif. When it removes a station it also
1796                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1797                  * of all the stations of this vif are closed, and the queues
1798                  * of these AMPDU sessions are properly closed.
1799                  * We still need to take care of the shared queues of the vif.
1800                  * Flush them here.
1801                  */
1802                 mutex_lock(&mvm->mutex);
1803                 iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1804                 mutex_unlock(&mvm->mutex);
1805
1806                 /*
1807                  * There are transports that buffer a few frames in the host.
1808                  * For these, the flush above isn't enough since while we were
1809                  * flushing, the transport might have sent more frames to the
1810                  * device. To solve this, wait here until the transport is
1811                  * empty. Technically, this could have replaced the flush
1812                  * above, but flush is much faster than draining. So flush
1813                  * first, and drain to make sure we have no frames in the
1814                  * transport anymore.
1815                  * If a station still had frames on the shared queues, it is
1816                  * already marked as draining, so to complete the draining, we
1817                  * just need to wait until the transport is empty.
1818                  */
1819                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1820         }
1821
1822         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1823                 /*
1824                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1825                  * We assume here that all the packets sent to the OFFCHANNEL
1826                  * queue are sent in ROC session.
1827                  */
1828                 flush_work(&mvm->roc_done_wk);
1829         } else {
1830                 /*
1831                  * By now, all the AC queues are empty. The AGG queues are
1832                  * empty too. We already got all the Tx responses for all the
1833                  * packets in the queues. The drain work can have been
1834                  * triggered. Flush it.
1835                  */
1836                 flush_work(&mvm->sta_drained_wk);
1837         }
1838 }
1839
1840 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1841                                          struct ieee80211_vif *vif)
1842 {
1843         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1844         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1845
1846         iwl_mvm_prepare_mac_removal(mvm, vif);
1847
1848         mutex_lock(&mvm->mutex);
1849
1850         if (mvm->bf_allowed_vif == mvmvif) {
1851                 mvm->bf_allowed_vif = NULL;
1852                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1853                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1854         }
1855
1856         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1857
1858         /*
1859          * For AP/GO interface, the tear down of the resources allocated to the
1860          * interface is be handled as part of the stop_ap flow.
1861          */
1862         if (vif->type == NL80211_IFTYPE_AP ||
1863             vif->type == NL80211_IFTYPE_ADHOC) {
1864 #ifdef CONFIG_NL80211_TESTMODE
1865                 if (vif == mvm->noa_vif) {
1866                         mvm->noa_vif = NULL;
1867                         mvm->noa_duration = 0;
1868                 }
1869 #endif
1870                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1871                 goto out_release;
1872         }
1873
1874         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1875                 mvm->p2p_device_vif = NULL;
1876                 iwl_mvm_rm_bcast_sta(mvm, vif);
1877                 iwl_mvm_binding_remove_vif(mvm, vif);
1878                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1879                 mvmvif->phy_ctxt = NULL;
1880         }
1881
1882         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1883                 mvm->vif_count--;
1884
1885         iwl_mvm_power_update_mac(mvm);
1886         iwl_mvm_mac_ctxt_remove(mvm, vif);
1887
1888 out_release:
1889         iwl_mvm_mac_ctxt_release(mvm, vif);
1890         mutex_unlock(&mvm->mutex);
1891 }
1892
1893 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1894 {
1895         return 0;
1896 }
1897
1898 struct iwl_mvm_mc_iter_data {
1899         struct iwl_mvm *mvm;
1900         int port_id;
1901 };
1902
1903 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1904                                       struct ieee80211_vif *vif)
1905 {
1906         struct iwl_mvm_mc_iter_data *data = _data;
1907         struct iwl_mvm *mvm = data->mvm;
1908         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1909         struct iwl_host_cmd hcmd = {
1910                 .id = MCAST_FILTER_CMD,
1911                 .flags = CMD_ASYNC,
1912                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1913         };
1914         int ret, len;
1915
1916         /* if we don't have free ports, mcast frames will be dropped */
1917         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1918                 return;
1919
1920         if (vif->type != NL80211_IFTYPE_STATION ||
1921             !vif->bss_conf.assoc)
1922                 return;
1923
1924         cmd->port_id = data->port_id++;
1925         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1926         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1927
1928         hcmd.len[0] = len;
1929         hcmd.data[0] = cmd;
1930
1931         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1932         if (ret)
1933                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1934 }
1935
1936 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1937 {
1938         struct iwl_mvm_mc_iter_data iter_data = {
1939                 .mvm = mvm,
1940         };
1941
1942         lockdep_assert_held(&mvm->mutex);
1943
1944         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1945                 return;
1946
1947         ieee80211_iterate_active_interfaces_atomic(
1948                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1949                 iwl_mvm_mc_iface_iterator, &iter_data);
1950 }
1951
1952 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1953                                      struct netdev_hw_addr_list *mc_list)
1954 {
1955         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1956         struct iwl_mcast_filter_cmd *cmd;
1957         struct netdev_hw_addr *addr;
1958         int addr_count;
1959         bool pass_all;
1960         int len;
1961
1962         addr_count = netdev_hw_addr_list_count(mc_list);
1963         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1964                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1965         if (pass_all)
1966                 addr_count = 0;
1967
1968         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1969         cmd = kzalloc(len, GFP_ATOMIC);
1970         if (!cmd)
1971                 return 0;
1972
1973         if (pass_all) {
1974                 cmd->pass_all = 1;
1975                 return (u64)(unsigned long)cmd;
1976         }
1977
1978         netdev_hw_addr_list_for_each(addr, mc_list) {
1979                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1980                                    cmd->count, addr->addr);
1981                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1982                        addr->addr, ETH_ALEN);
1983                 cmd->count++;
1984         }
1985
1986         return (u64)(unsigned long)cmd;
1987 }
1988
1989 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1990                                      unsigned int changed_flags,
1991                                      unsigned int *total_flags,
1992                                      u64 multicast)
1993 {
1994         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1995         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1996
1997         mutex_lock(&mvm->mutex);
1998
1999         /* replace previous configuration */
2000         kfree(mvm->mcast_filter_cmd);
2001         mvm->mcast_filter_cmd = cmd;
2002
2003         if (!cmd)
2004                 goto out;
2005
2006         iwl_mvm_recalc_multicast(mvm);
2007 out:
2008         mutex_unlock(&mvm->mutex);
2009         *total_flags = 0;
2010 }
2011
2012 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
2013                                         struct ieee80211_vif *vif,
2014                                         unsigned int filter_flags,
2015                                         unsigned int changed_flags)
2016 {
2017         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2018
2019         /* We support only filter for probe requests */
2020         if (!(changed_flags & FIF_PROBE_REQ))
2021                 return;
2022
2023         /* Supported only for p2p client interfaces */
2024         if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
2025             !vif->p2p)
2026                 return;
2027
2028         mutex_lock(&mvm->mutex);
2029         iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2030         mutex_unlock(&mvm->mutex);
2031 }
2032
2033 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
2034 struct iwl_bcast_iter_data {
2035         struct iwl_mvm *mvm;
2036         struct iwl_bcast_filter_cmd *cmd;
2037         u8 current_filter;
2038 };
2039
2040 static void
2041 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
2042                          const struct iwl_fw_bcast_filter *in_filter,
2043                          struct iwl_fw_bcast_filter *out_filter)
2044 {
2045         struct iwl_fw_bcast_filter_attr *attr;
2046         int i;
2047
2048         memcpy(out_filter, in_filter, sizeof(*out_filter));
2049
2050         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
2051                 attr = &out_filter->attrs[i];
2052
2053                 if (!attr->mask)
2054                         break;
2055
2056                 switch (attr->reserved1) {
2057                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
2058                         if (vif->bss_conf.arp_addr_cnt != 1) {
2059                                 attr->mask = 0;
2060                                 continue;
2061                         }
2062
2063                         attr->val = vif->bss_conf.arp_addr_list[0];
2064                         break;
2065                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
2066                         attr->val = *(__be32 *)&vif->addr[2];
2067                         break;
2068                 default:
2069                         break;
2070                 }
2071                 attr->reserved1 = 0;
2072                 out_filter->num_attrs++;
2073         }
2074 }
2075
2076 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
2077                                           struct ieee80211_vif *vif)
2078 {
2079         struct iwl_bcast_iter_data *data = _data;
2080         struct iwl_mvm *mvm = data->mvm;
2081         struct iwl_bcast_filter_cmd *cmd = data->cmd;
2082         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2083         struct iwl_fw_bcast_mac *bcast_mac;
2084         int i;
2085
2086         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
2087                 return;
2088
2089         bcast_mac = &cmd->macs[mvmvif->id];
2090
2091         /*
2092          * enable filtering only for associated stations, but not for P2P
2093          * Clients
2094          */
2095         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
2096             !vif->bss_conf.assoc)
2097                 return;
2098
2099         bcast_mac->default_discard = 1;
2100
2101         /* copy all configured filters */
2102         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
2103                 /*
2104                  * Make sure we don't exceed our filters limit.
2105                  * if there is still a valid filter to be configured,
2106                  * be on the safe side and just allow bcast for this mac.
2107                  */
2108                 if (WARN_ON_ONCE(data->current_filter >=
2109                                  ARRAY_SIZE(cmd->filters))) {
2110                         bcast_mac->default_discard = 0;
2111                         bcast_mac->attached_filters = 0;
2112                         break;
2113                 }
2114
2115                 iwl_mvm_set_bcast_filter(vif,
2116                                          &mvm->bcast_filters[i],
2117                                          &cmd->filters[data->current_filter]);
2118
2119                 /* skip current filter if it contains no attributes */
2120                 if (!cmd->filters[data->current_filter].num_attrs)
2121                         continue;
2122
2123                 /* attach the filter to current mac */
2124                 bcast_mac->attached_filters |=
2125                                 cpu_to_le16(BIT(data->current_filter));
2126
2127                 data->current_filter++;
2128         }
2129 }
2130
2131 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
2132                                     struct iwl_bcast_filter_cmd *cmd)
2133 {
2134         struct iwl_bcast_iter_data iter_data = {
2135                 .mvm = mvm,
2136                 .cmd = cmd,
2137         };
2138
2139         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
2140                 return false;
2141
2142         memset(cmd, 0, sizeof(*cmd));
2143         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
2144         cmd->max_macs = ARRAY_SIZE(cmd->macs);
2145
2146 #ifdef CONFIG_IWLWIFI_DEBUGFS
2147         /* use debugfs filters/macs if override is configured */
2148         if (mvm->dbgfs_bcast_filtering.override) {
2149                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
2150                        sizeof(cmd->filters));
2151                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
2152                        sizeof(cmd->macs));
2153                 return true;
2154         }
2155 #endif
2156
2157         /* if no filters are configured, do nothing */
2158         if (!mvm->bcast_filters)
2159                 return false;
2160
2161         /* configure and attach these filters for each associated sta vif */
2162         ieee80211_iterate_active_interfaces(
2163                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2164                 iwl_mvm_bcast_filter_iterator, &iter_data);
2165
2166         return true;
2167 }
2168 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2169                                           struct ieee80211_vif *vif)
2170 {
2171         struct iwl_bcast_filter_cmd cmd;
2172
2173         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2174                 return 0;
2175
2176         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2177                 return 0;
2178
2179         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2180                                     sizeof(cmd), &cmd);
2181 }
2182 #else
2183 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2184                                                  struct ieee80211_vif *vif)
2185 {
2186         return 0;
2187 }
2188 #endif
2189
2190 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2191                                              struct ieee80211_vif *vif,
2192                                              struct ieee80211_bss_conf *bss_conf,
2193                                              u32 changes)
2194 {
2195         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2196         int ret;
2197
2198         /*
2199          * Re-calculate the tsf id, as the master-slave relations depend on the
2200          * beacon interval, which was not known when the station interface was
2201          * added.
2202          */
2203         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2204                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2205
2206         /*
2207          * If we're not associated yet, take the (new) BSSID before associating
2208          * so the firmware knows. If we're already associated, then use the old
2209          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2210          * branch for disassociation below.
2211          */
2212         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2213                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2214
2215         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2216         if (ret)
2217                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2218
2219         /* after sending it once, adopt mac80211 data */
2220         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2221         mvmvif->associated = bss_conf->assoc;
2222
2223         if (changes & BSS_CHANGED_ASSOC) {
2224                 if (bss_conf->assoc) {
2225                         /* clear statistics to get clean beacon counter */
2226                         iwl_mvm_request_statistics(mvm, true);
2227                         memset(&mvmvif->beacon_stats, 0,
2228                                sizeof(mvmvif->beacon_stats));
2229
2230                         /* add quota for this interface */
2231                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2232                         if (ret) {
2233                                 IWL_ERR(mvm, "failed to update quotas\n");
2234                                 return;
2235                         }
2236
2237                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2238                                      &mvm->status)) {
2239                                 /*
2240                                  * If we're restarting then the firmware will
2241                                  * obviously have lost synchronisation with
2242                                  * the AP. It will attempt to synchronise by
2243                                  * itself, but we can make it more reliable by
2244                                  * scheduling a session protection time event.
2245                                  *
2246                                  * The firmware needs to receive a beacon to
2247                                  * catch up with synchronisation, use 110% of
2248                                  * the beacon interval.
2249                                  *
2250                                  * Set a large maximum delay to allow for more
2251                                  * than a single interface.
2252                                  */
2253                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2254                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2255                                                         5 * dur, false);
2256                         }
2257
2258                         iwl_mvm_sf_update(mvm, vif, false);
2259                         iwl_mvm_power_vif_assoc(mvm, vif);
2260                         if (vif->p2p) {
2261                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2262                                 iwl_mvm_update_smps(mvm, vif,
2263                                                     IWL_MVM_SMPS_REQ_PROT,
2264                                                     IEEE80211_SMPS_DYNAMIC);
2265                         }
2266                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2267                         /*
2268                          * If update fails - SF might be running in associated
2269                          * mode while disassociated - which is forbidden.
2270                          */
2271                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2272                                   "Failed to update SF upon disassociation\n");
2273
2274                         /* remove AP station now that the MAC is unassoc */
2275                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2276                         if (ret)
2277                                 IWL_ERR(mvm, "failed to remove AP station\n");
2278
2279                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2280                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2281                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2282                         /* remove quota for this interface */
2283                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2284                         if (ret)
2285                                 IWL_ERR(mvm, "failed to update quotas\n");
2286
2287                         if (vif->p2p)
2288                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2289
2290                         /* this will take the cleared BSSID from bss_conf */
2291                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2292                         if (ret)
2293                                 IWL_ERR(mvm,
2294                                         "failed to update MAC %pM (clear after unassoc)\n",
2295                                         vif->addr);
2296                 }
2297
2298                 iwl_mvm_recalc_multicast(mvm);
2299                 iwl_mvm_configure_bcast_filter(mvm, vif);
2300
2301                 /* reset rssi values */
2302                 mvmvif->bf_data.ave_beacon_signal = 0;
2303
2304                 iwl_mvm_bt_coex_vif_change(mvm);
2305                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2306                                     IEEE80211_SMPS_AUTOMATIC);
2307         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2308                 /*
2309                  * We received a beacon _after_ association so
2310                  * remove the session protection.
2311                  */
2312                 iwl_mvm_remove_time_event(mvm, mvmvif,
2313                                           &mvmvif->time_event_data);
2314         }
2315
2316         if (changes & BSS_CHANGED_BEACON_INFO) {
2317                 iwl_mvm_sf_update(mvm, vif, false);
2318                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2319         }
2320
2321         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2322                 ret = iwl_mvm_power_update_mac(mvm);
2323                 if (ret)
2324                         IWL_ERR(mvm, "failed to update power mode\n");
2325         }
2326
2327         if (changes & BSS_CHANGED_TXPOWER) {
2328                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2329                                 bss_conf->txpower);
2330                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2331         }
2332
2333         if (changes & BSS_CHANGED_CQM) {
2334                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2335                 /* reset cqm events tracking */
2336                 mvmvif->bf_data.last_cqm_event = 0;
2337                 if (mvmvif->bf_data.bf_enabled) {
2338                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2339                         if (ret)
2340                                 IWL_ERR(mvm,
2341                                         "failed to update CQM thresholds\n");
2342                 }
2343         }
2344
2345         if (changes & BSS_CHANGED_ARP_FILTER) {
2346                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2347                 iwl_mvm_configure_bcast_filter(mvm, vif);
2348         }
2349 }
2350
2351 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2352                                  struct ieee80211_vif *vif)
2353 {
2354         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2355         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2356         int ret;
2357
2358         /*
2359          * iwl_mvm_mac_ctxt_add() might read directly from the device
2360          * (the system time), so make sure it is available.
2361          */
2362         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2363         if (ret)
2364                 return ret;
2365
2366         mutex_lock(&mvm->mutex);
2367
2368         /* Send the beacon template */
2369         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2370         if (ret)
2371                 goto out_unlock;
2372
2373         /*
2374          * Re-calculate the tsf id, as the master-slave relations depend on the
2375          * beacon interval, which was not known when the AP interface was added.
2376          */
2377         if (vif->type == NL80211_IFTYPE_AP)
2378                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2379
2380         mvmvif->ap_assoc_sta_count = 0;
2381
2382         /* Add the mac context */
2383         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2384         if (ret)
2385                 goto out_unlock;
2386
2387         /* Perform the binding */
2388         ret = iwl_mvm_binding_add_vif(mvm, vif);
2389         if (ret)
2390                 goto out_remove;
2391
2392         /* Send the bcast station. At this stage the TBTT and DTIM time events
2393          * are added and applied to the scheduler */
2394         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2395         if (ret)
2396                 goto out_unbind;
2397
2398         /* must be set before quota calculations */
2399         mvmvif->ap_ibss_active = true;
2400
2401         /* power updated needs to be done before quotas */
2402         iwl_mvm_power_update_mac(mvm);
2403
2404         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2405         if (ret)
2406                 goto out_quota_failed;
2407
2408         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2409         if (vif->p2p && mvm->p2p_device_vif)
2410                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2411
2412         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2413
2414         iwl_mvm_bt_coex_vif_change(mvm);
2415
2416         /* we don't support TDLS during DCM */
2417         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2418                 iwl_mvm_teardown_tdls_peers(mvm);
2419
2420         goto out_unlock;
2421
2422 out_quota_failed:
2423         iwl_mvm_power_update_mac(mvm);
2424         mvmvif->ap_ibss_active = false;
2425         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2426 out_unbind:
2427         iwl_mvm_binding_remove_vif(mvm, vif);
2428 out_remove:
2429         iwl_mvm_mac_ctxt_remove(mvm, vif);
2430 out_unlock:
2431         mutex_unlock(&mvm->mutex);
2432         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2433         return ret;
2434 }
2435
2436 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2437                                  struct ieee80211_vif *vif)
2438 {
2439         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2440         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2441
2442         iwl_mvm_prepare_mac_removal(mvm, vif);
2443
2444         mutex_lock(&mvm->mutex);
2445
2446         /* Handle AP stop while in CSA */
2447         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2448                 iwl_mvm_remove_time_event(mvm, mvmvif,
2449                                           &mvmvif->time_event_data);
2450                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2451                 mvmvif->csa_countdown = false;
2452         }
2453
2454         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2455                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2456                 mvm->csa_tx_block_bcn_timeout = 0;
2457         }
2458
2459         mvmvif->ap_ibss_active = false;
2460         mvm->ap_last_beacon_gp2 = 0;
2461
2462         iwl_mvm_bt_coex_vif_change(mvm);
2463
2464         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2465
2466         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2467         if (vif->p2p && mvm->p2p_device_vif)
2468                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2469
2470         iwl_mvm_update_quotas(mvm, false, NULL);
2471         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2472         iwl_mvm_binding_remove_vif(mvm, vif);
2473
2474         iwl_mvm_power_update_mac(mvm);
2475
2476         iwl_mvm_mac_ctxt_remove(mvm, vif);
2477
2478         mutex_unlock(&mvm->mutex);
2479 }
2480
2481 static void
2482 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2483                                  struct ieee80211_vif *vif,
2484                                  struct ieee80211_bss_conf *bss_conf,
2485                                  u32 changes)
2486 {
2487         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2488
2489         /* Changes will be applied when the AP/IBSS is started */
2490         if (!mvmvif->ap_ibss_active)
2491                 return;
2492
2493         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2494                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2495             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2496                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2497
2498         /* Need to send a new beacon template to the FW */
2499         if (changes & BSS_CHANGED_BEACON &&
2500             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2501                 IWL_WARN(mvm, "Failed updating beacon data\n");
2502
2503         if (changes & BSS_CHANGED_TXPOWER) {
2504                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2505                                 bss_conf->txpower);
2506                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2507         }
2508
2509 }
2510
2511 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2512                                      struct ieee80211_vif *vif,
2513                                      struct ieee80211_bss_conf *bss_conf,
2514                                      u32 changes)
2515 {
2516         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2517
2518         /*
2519          * iwl_mvm_bss_info_changed_station() might call
2520          * iwl_mvm_protect_session(), which reads directly from
2521          * the device (the system time), so make sure it is available.
2522          */
2523         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2524                 return;
2525
2526         mutex_lock(&mvm->mutex);
2527
2528         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2529                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2530
2531         switch (vif->type) {
2532         case NL80211_IFTYPE_STATION:
2533                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2534                 break;
2535         case NL80211_IFTYPE_AP:
2536         case NL80211_IFTYPE_ADHOC:
2537                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2538                 break;
2539         default:
2540                 /* shouldn't happen */
2541                 WARN_ON_ONCE(1);
2542         }
2543
2544         mutex_unlock(&mvm->mutex);
2545         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2546 }
2547
2548 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2549                                struct ieee80211_vif *vif,
2550                                struct ieee80211_scan_request *hw_req)
2551 {
2552         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2553         int ret;
2554
2555         if (hw_req->req.n_channels == 0 ||
2556             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2557                 return -EINVAL;
2558
2559         mutex_lock(&mvm->mutex);
2560         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2561         mutex_unlock(&mvm->mutex);
2562
2563         return ret;
2564 }
2565
2566 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2567                                        struct ieee80211_vif *vif)
2568 {
2569         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2570
2571         mutex_lock(&mvm->mutex);
2572
2573         /* Due to a race condition, it's possible that mac80211 asks
2574          * us to stop a hw_scan when it's already stopped.  This can
2575          * happen, for instance, if we stopped the scan ourselves,
2576          * called ieee80211_scan_completed() and the userspace called
2577          * cancel scan scan before ieee80211_scan_work() could run.
2578          * To handle that, simply return if the scan is not running.
2579         */
2580         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2581                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2582
2583         mutex_unlock(&mvm->mutex);
2584 }
2585
2586 static void
2587 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2588                                   struct ieee80211_sta *sta, u16 tids,
2589                                   int num_frames,
2590                                   enum ieee80211_frame_release_type reason,
2591                                   bool more_data)
2592 {
2593         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2594
2595         /* Called when we need to transmit (a) frame(s) from mac80211 */
2596
2597         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2598                                           tids, more_data, false);
2599 }
2600
2601 static void
2602 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2603                                     struct ieee80211_sta *sta, u16 tids,
2604                                     int num_frames,
2605                                     enum ieee80211_frame_release_type reason,
2606                                     bool more_data)
2607 {
2608         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2609
2610         /* Called when we need to transmit (a) frame(s) from agg queue */
2611
2612         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2613                                           tids, more_data, true);
2614 }
2615
2616 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2617                                    struct ieee80211_vif *vif,
2618                                    enum sta_notify_cmd cmd,
2619                                    struct ieee80211_sta *sta)
2620 {
2621         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2622         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2623         unsigned long txqs = 0, tids = 0;
2624         int tid;
2625
2626         spin_lock_bh(&mvmsta->lock);
2627         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2628                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2629
2630                 if (tid_data->state != IWL_AGG_ON &&
2631                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2632                         continue;
2633
2634                 __set_bit(tid_data->txq_id, &txqs);
2635
2636                 if (iwl_mvm_tid_queued(tid_data) == 0)
2637                         continue;
2638
2639                 __set_bit(tid, &tids);
2640         }
2641
2642         switch (cmd) {
2643         case STA_NOTIFY_SLEEP:
2644                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2645                         ieee80211_sta_block_awake(hw, sta, true);
2646
2647                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2648                         ieee80211_sta_set_buffered(sta, tid, true);
2649
2650                 if (txqs)
2651                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2652                 /*
2653                  * The fw updates the STA to be asleep. Tx packets on the Tx
2654                  * queues to this station will not be transmitted. The fw will
2655                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2656                  */
2657                 break;
2658         case STA_NOTIFY_AWAKE:
2659                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2660                         break;
2661
2662                 if (txqs)
2663                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2664                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2665                 break;
2666         default:
2667                 break;
2668         }
2669         spin_unlock_bh(&mvmsta->lock);
2670 }
2671
2672 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2673                                        struct ieee80211_vif *vif,
2674                                        struct ieee80211_sta *sta)
2675 {
2676         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2677         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2678         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2679
2680         /*
2681          * This is called before mac80211 does RCU synchronisation,
2682          * so here we already invalidate our internal RCU-protected
2683          * station pointer. The rest of the code will thus no longer
2684          * be able to find the station this way, and we don't rely
2685          * on further RCU synchronisation after the sta_state()
2686          * callback deleted the station.
2687          */
2688         mutex_lock(&mvm->mutex);
2689         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2690                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2691                                    ERR_PTR(-ENOENT));
2692
2693         if (mvm_sta->vif->type == NL80211_IFTYPE_AP) {
2694                 mvmvif->ap_assoc_sta_count--;
2695                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2696         }
2697
2698         mutex_unlock(&mvm->mutex);
2699 }
2700
2701 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2702                                 const u8 *bssid)
2703 {
2704         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2705                 return;
2706
2707         if (iwlwifi_mod_params.uapsd_disable) {
2708                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2709                 return;
2710         }
2711
2712         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2713 }
2714
2715 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2716                                  struct ieee80211_vif *vif,
2717                                  struct ieee80211_sta *sta,
2718                                  enum ieee80211_sta_state old_state,
2719                                  enum ieee80211_sta_state new_state)
2720 {
2721         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2722         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2723         int ret;
2724
2725         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2726                            sta->addr, old_state, new_state);
2727
2728         /* this would be a mac80211 bug ... but don't crash */
2729         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2730                 return -EINVAL;
2731
2732         /* if a STA is being removed, reuse its ID */
2733         flush_work(&mvm->sta_drained_wk);
2734
2735         mutex_lock(&mvm->mutex);
2736         if (old_state == IEEE80211_STA_NOTEXIST &&
2737             new_state == IEEE80211_STA_NONE) {
2738                 /*
2739                  * Firmware bug - it'll crash if the beacon interval is less
2740                  * than 16. We can't avoid connecting at all, so refuse the
2741                  * station state change, this will cause mac80211 to abandon
2742                  * attempts to connect to this AP, and eventually wpa_s will
2743                  * blacklist the AP...
2744                  */
2745                 if (vif->type == NL80211_IFTYPE_STATION &&
2746                     vif->bss_conf.beacon_int < 16) {
2747                         IWL_ERR(mvm,
2748                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2749                                 sta->addr, vif->bss_conf.beacon_int);
2750                         ret = -EINVAL;
2751                         goto out_unlock;
2752                 }
2753
2754                 if (sta->tdls &&
2755                     (vif->p2p ||
2756                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2757                                                 IWL_MVM_TDLS_STA_COUNT ||
2758                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2759                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2760                         ret = -EBUSY;
2761                         goto out_unlock;
2762                 }
2763
2764                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2765                 if (sta->tdls && ret == 0)
2766                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2767         } else if (old_state == IEEE80211_STA_NONE &&
2768                    new_state == IEEE80211_STA_AUTH) {
2769                 /*
2770                  * EBS may be disabled due to previous failures reported by FW.
2771                  * Reset EBS status here assuming environment has been changed.
2772                  */
2773                 mvm->last_ebs_successful = true;
2774                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2775                 ret = 0;
2776         } else if (old_state == IEEE80211_STA_AUTH &&
2777                    new_state == IEEE80211_STA_ASSOC) {
2778                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2779                 if (ret == 0)
2780                         iwl_mvm_rs_rate_init(mvm, sta,
2781                                              mvmvif->phy_ctxt->channel->band,
2782                                              true);
2783         } else if (old_state == IEEE80211_STA_ASSOC &&
2784                    new_state == IEEE80211_STA_AUTHORIZED) {
2785
2786                 /* we don't support TDLS during DCM */
2787                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2788                         iwl_mvm_teardown_tdls_peers(mvm);
2789
2790                 /* enable beacon filtering */
2791                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2792                 ret = 0;
2793         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2794                    new_state == IEEE80211_STA_ASSOC) {
2795                 /* disable beacon filtering */
2796                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2797                 ret = 0;
2798         } else if (old_state == IEEE80211_STA_ASSOC &&
2799                    new_state == IEEE80211_STA_AUTH) {
2800                 ret = 0;
2801         } else if (old_state == IEEE80211_STA_AUTH &&
2802                    new_state == IEEE80211_STA_NONE) {
2803                 ret = 0;
2804         } else if (old_state == IEEE80211_STA_NONE &&
2805                    new_state == IEEE80211_STA_NOTEXIST) {
2806                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2807                 if (sta->tdls)
2808                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2809         } else {
2810                 ret = -EIO;
2811         }
2812  out_unlock:
2813         mutex_unlock(&mvm->mutex);
2814
2815         if (sta->tdls && ret == 0) {
2816                 if (old_state == IEEE80211_STA_NOTEXIST &&
2817                     new_state == IEEE80211_STA_NONE)
2818                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2819                 else if (old_state == IEEE80211_STA_NONE &&
2820                          new_state == IEEE80211_STA_NOTEXIST)
2821                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2822         }
2823
2824         return ret;
2825 }
2826
2827 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2828 {
2829         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2830
2831         mvm->rts_threshold = value;
2832
2833         return 0;
2834 }
2835
2836 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2837                                   struct ieee80211_vif *vif,
2838                                   struct ieee80211_sta *sta, u32 changed)
2839 {
2840         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2841
2842         if (vif->type == NL80211_IFTYPE_STATION &&
2843             changed & IEEE80211_RC_NSS_CHANGED)
2844                 iwl_mvm_sf_update(mvm, vif, false);
2845 }
2846
2847 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2848                                struct ieee80211_vif *vif, u16 ac,
2849                                const struct ieee80211_tx_queue_params *params)
2850 {
2851         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2852         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2853
2854         mvmvif->queue_params[ac] = *params;
2855
2856         /*
2857          * No need to update right away, we'll get BSS_CHANGED_QOS
2858          * The exception is P2P_DEVICE interface which needs immediate update.
2859          */
2860         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2861                 int ret;
2862
2863                 mutex_lock(&mvm->mutex);
2864                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2865                 mutex_unlock(&mvm->mutex);
2866                 return ret;
2867         }
2868         return 0;
2869 }
2870
2871 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2872                                       struct ieee80211_vif *vif)
2873 {
2874         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2875         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2876                            200 + vif->bss_conf.beacon_int);
2877         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2878                                100 + vif->bss_conf.beacon_int);
2879
2880         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2881                 return;
2882
2883         /*
2884          * iwl_mvm_protect_session() reads directly from the device
2885          * (the system time), so make sure it is available.
2886          */
2887         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2888                 return;
2889
2890         mutex_lock(&mvm->mutex);
2891         /* Try really hard to protect the session and hear a beacon */
2892         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2893         mutex_unlock(&mvm->mutex);
2894
2895         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2896 }
2897
2898 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2899                                         struct ieee80211_vif *vif,
2900                                         struct cfg80211_sched_scan_request *req,
2901                                         struct ieee80211_scan_ies *ies)
2902 {
2903         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2904
2905         int ret;
2906
2907         mutex_lock(&mvm->mutex);
2908
2909         if (!vif->bss_conf.idle) {
2910                 ret = -EBUSY;
2911                 goto out;
2912         }
2913
2914         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2915
2916 out:
2917         mutex_unlock(&mvm->mutex);
2918         return ret;
2919 }
2920
2921 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2922                                        struct ieee80211_vif *vif)
2923 {
2924         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2925         int ret;
2926
2927         mutex_lock(&mvm->mutex);
2928
2929         /* Due to a race condition, it's possible that mac80211 asks
2930          * us to stop a sched_scan when it's already stopped.  This
2931          * can happen, for instance, if we stopped the scan ourselves,
2932          * called ieee80211_sched_scan_stopped() and the userspace called
2933          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2934          * could run.  To handle this, simply return if the scan is
2935          * not running.
2936         */
2937         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2938                 mutex_unlock(&mvm->mutex);
2939                 return 0;
2940         }
2941
2942         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2943         mutex_unlock(&mvm->mutex);
2944         iwl_mvm_wait_for_async_handlers(mvm);
2945
2946         return ret;
2947 }
2948
2949 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2950                                enum set_key_cmd cmd,
2951                                struct ieee80211_vif *vif,
2952                                struct ieee80211_sta *sta,
2953                                struct ieee80211_key_conf *key)
2954 {
2955         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2956         int ret;
2957         u8 key_offset;
2958
2959         if (iwlwifi_mod_params.sw_crypto) {
2960                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2961                 return -EOPNOTSUPP;
2962         }
2963
2964         switch (key->cipher) {
2965         case WLAN_CIPHER_SUITE_TKIP:
2966                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2967                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2968                 break;
2969         case WLAN_CIPHER_SUITE_CCMP:
2970                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2971                 break;
2972         case WLAN_CIPHER_SUITE_AES_CMAC:
2973                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2974                 break;
2975         case WLAN_CIPHER_SUITE_WEP40:
2976         case WLAN_CIPHER_SUITE_WEP104:
2977                 /* For non-client mode, only use WEP keys for TX as we probably
2978                  * don't have a station yet anyway and would then have to keep
2979                  * track of the keys, linking them to each of the clients/peers
2980                  * as they appear. For now, don't do that, for performance WEP
2981                  * offload doesn't really matter much, but we need it for some
2982                  * other offload features in client mode.
2983                  */
2984                 if (vif->type != NL80211_IFTYPE_STATION)
2985                         return 0;
2986                 break;
2987         default:
2988                 /* currently FW supports only one optional cipher scheme */
2989                 if (hw->n_cipher_schemes &&
2990                     hw->cipher_schemes->cipher == key->cipher)
2991                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2992                 else
2993                         return -EOPNOTSUPP;
2994         }
2995
2996         mutex_lock(&mvm->mutex);
2997
2998         switch (cmd) {
2999         case SET_KEY:
3000                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
3001                      vif->type == NL80211_IFTYPE_AP) && !sta) {
3002                         /*
3003                          * GTK on AP interface is a TX-only key, return 0;
3004                          * on IBSS they're per-station and because we're lazy
3005                          * we don't support them for RX, so do the same.
3006                          */
3007                         ret = 0;
3008                         key->hw_key_idx = STA_KEY_IDX_INVALID;
3009                         break;
3010                 }
3011
3012                 /* During FW restart, in order to restore the state as it was,
3013                  * don't try to reprogram keys we previously failed for.
3014                  */
3015                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
3016                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
3017                         IWL_DEBUG_MAC80211(mvm,
3018                                            "skip invalid idx key programming during restart\n");
3019                         ret = 0;
3020                         break;
3021                 }
3022
3023                 /* in HW restart reuse the index, otherwise request a new one */
3024                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
3025                         key_offset = key->hw_key_idx;
3026                 else
3027                         key_offset = STA_KEY_IDX_INVALID;
3028
3029                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
3030                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
3031                 if (ret) {
3032                         IWL_WARN(mvm, "set key failed\n");
3033                         /*
3034                          * can't add key for RX, but we don't need it
3035                          * in the device for TX so still return 0
3036                          */
3037                         key->hw_key_idx = STA_KEY_IDX_INVALID;
3038                         ret = 0;
3039                 }
3040
3041                 break;
3042         case DISABLE_KEY:
3043                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
3044                         ret = 0;
3045                         break;
3046                 }
3047
3048                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
3049                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
3050                 break;
3051         default:
3052                 ret = -EINVAL;
3053         }
3054
3055         mutex_unlock(&mvm->mutex);
3056         return ret;
3057 }
3058
3059 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
3060                                         struct ieee80211_vif *vif,
3061                                         struct ieee80211_key_conf *keyconf,
3062                                         struct ieee80211_sta *sta,
3063                                         u32 iv32, u16 *phase1key)
3064 {
3065         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3066
3067         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
3068                 return;
3069
3070         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
3071 }
3072
3073
3074 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
3075                                struct iwl_rx_packet *pkt, void *data)
3076 {
3077         struct iwl_mvm *mvm =
3078                 container_of(notif_wait, struct iwl_mvm, notif_wait);
3079         struct iwl_hs20_roc_res *resp;
3080         int resp_len = iwl_rx_packet_payload_len(pkt);
3081         struct iwl_mvm_time_event_data *te_data = data;
3082
3083         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
3084                 return true;
3085
3086         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
3087                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
3088                 return true;
3089         }
3090
3091         resp = (void *)pkt->data;
3092
3093         IWL_DEBUG_TE(mvm,
3094                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
3095                      resp->status, resp->event_unique_id);
3096
3097         te_data->uid = le32_to_cpu(resp->event_unique_id);
3098         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
3099                      te_data->uid);
3100
3101         spin_lock_bh(&mvm->time_event_lock);
3102         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
3103         spin_unlock_bh(&mvm->time_event_lock);
3104
3105         return true;
3106 }
3107
3108 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 200
3109 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
3110                                     struct ieee80211_channel *channel,
3111                                     struct ieee80211_vif *vif,
3112                                     int duration)
3113 {
3114         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
3115         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3116         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
3117         static const u16 time_event_response[] = { HOT_SPOT_CMD };
3118         struct iwl_notification_wait wait_time_event;
3119         struct iwl_hs20_roc_req aux_roc_req = {
3120                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
3121                 .id_and_color =
3122                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
3123                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
3124                 /* Set the channel info data */
3125                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
3126                         PHY_BAND_24 : PHY_BAND_5,
3127                 .channel_info.channel = channel->hw_value,
3128                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
3129                 /* Set the time and duration */
3130                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
3131                 .apply_time_max_delay =
3132                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
3133                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
3134          };
3135
3136         /* Set the node address */
3137         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3138
3139         lockdep_assert_held(&mvm->mutex);
3140
3141         spin_lock_bh(&mvm->time_event_lock);
3142
3143         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3144                 spin_unlock_bh(&mvm->time_event_lock);
3145                 return -EIO;
3146         }
3147
3148         te_data->vif = vif;
3149         te_data->duration = duration;
3150         te_data->id = HOT_SPOT_CMD;
3151
3152         spin_unlock_bh(&mvm->time_event_lock);
3153
3154         /*
3155          * Use a notification wait, which really just processes the
3156          * command response and doesn't wait for anything, in order
3157          * to be able to process the response and get the UID inside
3158          * the RX path. Using CMD_WANT_SKB doesn't work because it
3159          * stores the buffer and then wakes up this thread, by which
3160          * time another notification (that the time event started)
3161          * might already be processed unsuccessfully.
3162          */
3163         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3164                                    time_event_response,
3165                                    ARRAY_SIZE(time_event_response),
3166                                    iwl_mvm_rx_aux_roc, te_data);
3167
3168         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3169                                    &aux_roc_req);
3170
3171         if (res) {
3172                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3173                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3174                 goto out_clear_te;
3175         }
3176
3177         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3178         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3179         /* should never fail */
3180         WARN_ON_ONCE(res);
3181
3182         if (res) {
3183  out_clear_te:
3184                 spin_lock_bh(&mvm->time_event_lock);
3185                 iwl_mvm_te_clear_data(mvm, te_data);
3186                 spin_unlock_bh(&mvm->time_event_lock);
3187         }
3188
3189         return res;
3190 }
3191
3192 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3193                        struct ieee80211_vif *vif,
3194                        struct ieee80211_channel *channel,
3195                        int duration,
3196                        enum ieee80211_roc_type type)
3197 {
3198         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3199         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3200         struct cfg80211_chan_def chandef;
3201         struct iwl_mvm_phy_ctxt *phy_ctxt;
3202         int ret, i;
3203
3204         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3205                            duration, type);
3206
3207         flush_work(&mvm->roc_done_wk);
3208
3209         mutex_lock(&mvm->mutex);
3210
3211         switch (vif->type) {
3212         case NL80211_IFTYPE_STATION:
3213                 if (fw_has_capa(&mvm->fw->ucode_capa,
3214                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3215                         /* Use aux roc framework (HS20) */
3216                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3217                                                        vif, duration);
3218                         goto out_unlock;
3219                 }
3220                 IWL_ERR(mvm, "hotspot not supported\n");
3221                 ret = -EINVAL;
3222                 goto out_unlock;
3223         case NL80211_IFTYPE_P2P_DEVICE:
3224                 /* handle below */
3225                 break;
3226         default:
3227                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3228                 ret = -EINVAL;
3229                 goto out_unlock;
3230         }
3231
3232         for (i = 0; i < NUM_PHY_CTX; i++) {
3233                 phy_ctxt = &mvm->phy_ctxts[i];
3234                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3235                         continue;
3236
3237                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3238                         /*
3239                          * Unbind the P2P_DEVICE from the current PHY context,
3240                          * and if the PHY context is not used remove it.
3241                          */
3242                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3243                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3244                                 goto out_unlock;
3245
3246                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3247
3248                         /* Bind the P2P_DEVICE to the current PHY Context */
3249                         mvmvif->phy_ctxt = phy_ctxt;
3250
3251                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3252                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3253                                 goto out_unlock;
3254
3255                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3256                         goto schedule_time_event;
3257                 }
3258         }
3259
3260         /* Need to update the PHY context only if the ROC channel changed */
3261         if (channel == mvmvif->phy_ctxt->channel)
3262                 goto schedule_time_event;
3263
3264         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3265
3266         /*
3267          * Change the PHY context configuration as it is currently referenced
3268          * only by the P2P Device MAC
3269          */
3270         if (mvmvif->phy_ctxt->ref == 1) {
3271                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3272                                                &chandef, 1, 1);
3273                 if (ret)
3274                         goto out_unlock;
3275         } else {
3276                 /*
3277                  * The PHY context is shared with other MACs. Need to remove the
3278                  * P2P Device from the binding, allocate an new PHY context and
3279                  * create a new binding
3280                  */
3281                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3282                 if (!phy_ctxt) {
3283                         ret = -ENOSPC;
3284                         goto out_unlock;
3285                 }
3286
3287                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3288                                                1, 1);
3289                 if (ret) {
3290                         IWL_ERR(mvm, "Failed to change PHY context\n");
3291                         goto out_unlock;
3292                 }
3293
3294                 /* Unbind the P2P_DEVICE from the current PHY context */
3295                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3296                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3297                         goto out_unlock;
3298
3299                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3300
3301                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3302                 mvmvif->phy_ctxt = phy_ctxt;
3303
3304                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3305                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3306                         goto out_unlock;
3307
3308                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3309         }
3310
3311 schedule_time_event:
3312         /* Schedule the time events */
3313         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3314
3315 out_unlock:
3316         mutex_unlock(&mvm->mutex);
3317         IWL_DEBUG_MAC80211(mvm, "leave\n");
3318         return ret;
3319 }
3320
3321 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3322 {
3323         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3324
3325         IWL_DEBUG_MAC80211(mvm, "enter\n");
3326
3327         mutex_lock(&mvm->mutex);
3328         iwl_mvm_stop_roc(mvm);
3329         mutex_unlock(&mvm->mutex);
3330
3331         IWL_DEBUG_MAC80211(mvm, "leave\n");
3332         return 0;
3333 }
3334
3335 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3336                                  struct ieee80211_chanctx_conf *ctx)
3337 {
3338         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3339         struct iwl_mvm_phy_ctxt *phy_ctxt;
3340         int ret;
3341
3342         lockdep_assert_held(&mvm->mutex);
3343
3344         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3345
3346         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3347         if (!phy_ctxt) {
3348                 ret = -ENOSPC;
3349                 goto out;
3350         }
3351
3352         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3353                                        ctx->rx_chains_static,
3354                                        ctx->rx_chains_dynamic);
3355         if (ret) {
3356                 IWL_ERR(mvm, "Failed to add PHY context\n");
3357                 goto out;
3358         }
3359
3360         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3361         *phy_ctxt_id = phy_ctxt->id;
3362 out:
3363         return ret;
3364 }
3365
3366 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3367                                struct ieee80211_chanctx_conf *ctx)
3368 {
3369         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3370         int ret;
3371
3372         mutex_lock(&mvm->mutex);
3373         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3374         mutex_unlock(&mvm->mutex);
3375
3376         return ret;
3377 }
3378
3379 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3380                                      struct ieee80211_chanctx_conf *ctx)
3381 {
3382         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3383         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3384
3385         lockdep_assert_held(&mvm->mutex);
3386
3387         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3388 }
3389
3390 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3391                                    struct ieee80211_chanctx_conf *ctx)
3392 {
3393         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3394
3395         mutex_lock(&mvm->mutex);
3396         __iwl_mvm_remove_chanctx(mvm, ctx);
3397         mutex_unlock(&mvm->mutex);
3398 }
3399
3400 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3401                                    struct ieee80211_chanctx_conf *ctx,
3402                                    u32 changed)
3403 {
3404         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3405         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3406         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3407
3408         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3409                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3410                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3411                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3412                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3413                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3414                       phy_ctxt->ref, changed))
3415                 return;
3416
3417         mutex_lock(&mvm->mutex);
3418         iwl_mvm_bt_coex_vif_change(mvm);
3419         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3420                                  ctx->rx_chains_static,
3421                                  ctx->rx_chains_dynamic);
3422         mutex_unlock(&mvm->mutex);
3423 }
3424
3425 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3426                                         struct ieee80211_vif *vif,
3427                                         struct ieee80211_chanctx_conf *ctx,
3428                                         bool switching_chanctx)
3429 {
3430         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3431         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3432         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3433         int ret;
3434
3435         lockdep_assert_held(&mvm->mutex);
3436
3437         mvmvif->phy_ctxt = phy_ctxt;
3438
3439         switch (vif->type) {
3440         case NL80211_IFTYPE_AP:
3441                 /* only needed if we're switching chanctx (i.e. during CSA) */
3442                 if (switching_chanctx) {
3443                         mvmvif->ap_ibss_active = true;
3444                         break;
3445                 }
3446         case NL80211_IFTYPE_ADHOC:
3447                 /*
3448                  * The AP binding flow is handled as part of the start_ap flow
3449                  * (in bss_info_changed), similarly for IBSS.
3450                  */
3451                 ret = 0;
3452                 goto out;
3453         case NL80211_IFTYPE_STATION:
3454                 break;
3455         case NL80211_IFTYPE_MONITOR:
3456                 /* always disable PS when a monitor interface is active */
3457                 mvmvif->ps_disabled = true;
3458                 break;
3459         default:
3460                 ret = -EINVAL;
3461                 goto out;
3462         }
3463
3464         ret = iwl_mvm_binding_add_vif(mvm, vif);
3465         if (ret)
3466                 goto out;
3467
3468         /*
3469          * Power state must be updated before quotas,
3470          * otherwise fw will complain.
3471          */
3472         iwl_mvm_power_update_mac(mvm);
3473
3474         /* Setting the quota at this stage is only required for monitor
3475          * interfaces. For the other types, the bss_info changed flow
3476          * will handle quota settings.
3477          */
3478         if (vif->type == NL80211_IFTYPE_MONITOR) {
3479                 mvmvif->monitor_active = true;
3480                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3481                 if (ret)
3482                         goto out_remove_binding;
3483         }
3484
3485         /* Handle binding during CSA */
3486         if (vif->type == NL80211_IFTYPE_AP) {
3487                 iwl_mvm_update_quotas(mvm, false, NULL);
3488                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3489         }
3490
3491         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3492                 u32 duration = 2 * vif->bss_conf.beacon_int;
3493
3494                 /* iwl_mvm_protect_session() reads directly from the
3495                  * device (the system time), so make sure it is
3496                  * available.
3497                  */
3498                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3499                 if (ret)
3500                         goto out_remove_binding;
3501
3502                 /* Protect the session to make sure we hear the first
3503                  * beacon on the new channel.
3504                  */
3505                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3506                                         vif->bss_conf.beacon_int / 2,
3507                                         true);
3508
3509                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3510
3511                 iwl_mvm_update_quotas(mvm, false, NULL);
3512         }
3513
3514         goto out;
3515
3516 out_remove_binding:
3517         iwl_mvm_binding_remove_vif(mvm, vif);
3518         iwl_mvm_power_update_mac(mvm);
3519 out:
3520         if (ret)
3521                 mvmvif->phy_ctxt = NULL;
3522         return ret;
3523 }
3524 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3525                                       struct ieee80211_vif *vif,
3526                                       struct ieee80211_chanctx_conf *ctx)
3527 {
3528         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3529         int ret;
3530
3531         mutex_lock(&mvm->mutex);
3532         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3533         mutex_unlock(&mvm->mutex);
3534
3535         return ret;
3536 }
3537
3538 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3539                                            struct ieee80211_vif *vif,
3540                                            struct ieee80211_chanctx_conf *ctx,
3541                                            bool switching_chanctx)
3542 {
3543         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3544         struct ieee80211_vif *disabled_vif = NULL;
3545
3546         lockdep_assert_held(&mvm->mutex);
3547
3548         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3549
3550         switch (vif->type) {
3551         case NL80211_IFTYPE_ADHOC:
3552                 goto out;
3553         case NL80211_IFTYPE_MONITOR:
3554                 mvmvif->monitor_active = false;
3555                 mvmvif->ps_disabled = false;
3556                 break;
3557         case NL80211_IFTYPE_AP:
3558                 /* This part is triggered only during CSA */
3559                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3560                         goto out;
3561
3562                 mvmvif->csa_countdown = false;
3563
3564                 /* Set CS bit on all the stations */
3565                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3566
3567                 /* Save blocked iface, the timeout is set on the next beacon */
3568                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3569
3570                 mvmvif->ap_ibss_active = false;
3571                 break;
3572         case NL80211_IFTYPE_STATION:
3573                 if (!switching_chanctx)
3574                         break;
3575
3576                 disabled_vif = vif;
3577
3578                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3579                 break;
3580         default:
3581                 break;
3582         }
3583
3584         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3585         iwl_mvm_binding_remove_vif(mvm, vif);
3586
3587 out:
3588         mvmvif->phy_ctxt = NULL;
3589         iwl_mvm_power_update_mac(mvm);
3590 }
3591
3592 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3593                                          struct ieee80211_vif *vif,
3594                                          struct ieee80211_chanctx_conf *ctx)
3595 {
3596         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3597
3598         mutex_lock(&mvm->mutex);
3599         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3600         mutex_unlock(&mvm->mutex);
3601 }
3602
3603 static int
3604 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3605                                 struct ieee80211_vif_chanctx_switch *vifs)
3606 {
3607         int ret;
3608
3609         mutex_lock(&mvm->mutex);
3610         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3611         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3612
3613         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3614         if (ret) {
3615                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3616                 goto out_reassign;
3617         }
3618
3619         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3620                                            true);
3621         if (ret) {
3622                 IWL_ERR(mvm,
3623                         "failed to assign new_ctx during channel switch\n");
3624                 goto out_remove;
3625         }
3626
3627         /* we don't support TDLS during DCM - can be caused by channel switch */
3628         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3629                 iwl_mvm_teardown_tdls_peers(mvm);
3630
3631         goto out;
3632
3633 out_remove:
3634         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3635
3636 out_reassign:
3637         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3638                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3639                 goto out_restart;
3640         }
3641
3642         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3643                                          true)) {
3644                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3645                 goto out_restart;
3646         }
3647
3648         goto out;
3649
3650 out_restart:
3651         /* things keep failing, better restart the hw */
3652         iwl_mvm_nic_restart(mvm, false);
3653
3654 out:
3655         mutex_unlock(&mvm->mutex);
3656
3657         return ret;
3658 }
3659
3660 static int
3661 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3662                                     struct ieee80211_vif_chanctx_switch *vifs)
3663 {
3664         int ret;
3665
3666         mutex_lock(&mvm->mutex);
3667         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3668
3669         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3670                                            true);
3671         if (ret) {
3672                 IWL_ERR(mvm,
3673                         "failed to assign new_ctx during channel switch\n");
3674                 goto out_reassign;
3675         }
3676
3677         goto out;
3678
3679 out_reassign:
3680         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3681                                          true)) {
3682                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3683                 goto out_restart;
3684         }
3685
3686         goto out;
3687
3688 out_restart:
3689         /* things keep failing, better restart the hw */
3690         iwl_mvm_nic_restart(mvm, false);
3691
3692 out:
3693         mutex_unlock(&mvm->mutex);
3694
3695         return ret;
3696 }
3697
3698 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3699                                       struct ieee80211_vif_chanctx_switch *vifs,
3700                                       int n_vifs,
3701                                       enum ieee80211_chanctx_switch_mode mode)
3702 {
3703         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3704         int ret;
3705
3706         /* we only support a single-vif right now */
3707         if (n_vifs > 1)
3708                 return -EOPNOTSUPP;
3709
3710         switch (mode) {
3711         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3712                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3713                 break;
3714         case CHANCTX_SWMODE_REASSIGN_VIF:
3715                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3716                 break;
3717         default:
3718                 ret = -EOPNOTSUPP;
3719                 break;
3720         }
3721
3722         return ret;
3723 }
3724
3725 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3726                            struct ieee80211_sta *sta,
3727                            bool set)
3728 {
3729         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3730         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3731
3732         if (!mvm_sta || !mvm_sta->vif) {
3733                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3734                 return -EINVAL;
3735         }
3736
3737         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3738 }
3739
3740 #ifdef CONFIG_NL80211_TESTMODE
3741 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3742         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3743         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3744         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3745 };
3746
3747 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3748                                       struct ieee80211_vif *vif,
3749                                       void *data, int len)
3750 {
3751         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3752         int err;
3753         u32 noa_duration;
3754
3755         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3756         if (err)
3757                 return err;
3758
3759         if (!tb[IWL_MVM_TM_ATTR_CMD])
3760                 return -EINVAL;
3761
3762         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3763         case IWL_MVM_TM_CMD_SET_NOA:
3764                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3765                     !vif->bss_conf.enable_beacon ||
3766                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3767                         return -EINVAL;
3768
3769                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3770                 if (noa_duration >= vif->bss_conf.beacon_int)
3771                         return -EINVAL;
3772
3773                 mvm->noa_duration = noa_duration;
3774                 mvm->noa_vif = vif;
3775
3776                 return iwl_mvm_update_quotas(mvm, false, NULL);
3777         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3778                 /* must be associated client vif - ignore authorized */
3779                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3780                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3781                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3782                         return -EINVAL;
3783
3784                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3785                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3786                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3787         }
3788
3789         return -EOPNOTSUPP;
3790 }
3791
3792 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3793                                     struct ieee80211_vif *vif,
3794                                     void *data, int len)
3795 {
3796         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3797         int err;
3798
3799         mutex_lock(&mvm->mutex);
3800         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3801         mutex_unlock(&mvm->mutex);
3802
3803         return err;
3804 }
3805 #endif
3806
3807 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3808                                    struct ieee80211_vif *vif,
3809                                    struct ieee80211_channel_switch *chsw)
3810 {
3811         /* By implementing this operation, we prevent mac80211 from
3812          * starting its own channel switch timer, so that we can call
3813          * ieee80211_chswitch_done() ourselves at the right time
3814          * (which is when the absence time event starts).
3815          */
3816
3817         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3818                            "dummy channel switch op\n");
3819 }
3820
3821 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3822                                       struct ieee80211_vif *vif,
3823                                       struct ieee80211_channel_switch *chsw)
3824 {
3825         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3826         struct ieee80211_vif *csa_vif;
3827         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3828         u32 apply_time;
3829         int ret;
3830
3831         mutex_lock(&mvm->mutex);
3832
3833         mvmvif->csa_failed = false;
3834
3835         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3836                            chsw->chandef.center_freq1);
3837
3838         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3839
3840         switch (vif->type) {
3841         case NL80211_IFTYPE_AP:
3842                 csa_vif =
3843                         rcu_dereference_protected(mvm->csa_vif,
3844                                                   lockdep_is_held(&mvm->mutex));
3845                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3846                               "Another CSA is already in progress")) {
3847                         ret = -EBUSY;
3848                         goto out_unlock;
3849                 }
3850
3851                 rcu_assign_pointer(mvm->csa_vif, vif);
3852
3853                 if (WARN_ONCE(mvmvif->csa_countdown,
3854                               "Previous CSA countdown didn't complete")) {
3855                         ret = -EBUSY;
3856                         goto out_unlock;
3857                 }
3858
3859                 break;
3860         case NL80211_IFTYPE_STATION:
3861                 /* Schedule the time event to a bit before beacon 1,
3862                  * to make sure we're in the new channel when the
3863                  * GO/AP arrives.
3864                  */
3865                 apply_time = chsw->device_timestamp +
3866                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3867                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3868
3869                 if (chsw->block_tx)
3870                         iwl_mvm_csa_client_absent(mvm, vif);
3871
3872                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3873                                             apply_time);
3874                 if (mvmvif->bf_data.bf_enabled) {
3875                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3876                         if (ret)
3877                                 goto out_unlock;
3878                 }
3879
3880                 break;
3881         default:
3882                 break;
3883         }
3884
3885         mvmvif->ps_disabled = true;
3886
3887         ret = iwl_mvm_power_update_ps(mvm);
3888         if (ret)
3889                 goto out_unlock;
3890
3891         /* we won't be on this channel any longer */
3892         iwl_mvm_teardown_tdls_peers(mvm);
3893
3894 out_unlock:
3895         mutex_unlock(&mvm->mutex);
3896
3897         return ret;
3898 }
3899
3900 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3901                                        struct ieee80211_vif *vif)
3902 {
3903         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3904         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3905         int ret;
3906
3907         mutex_lock(&mvm->mutex);
3908
3909         if (mvmvif->csa_failed) {
3910                 mvmvif->csa_failed = false;
3911                 ret = -EIO;
3912                 goto out_unlock;
3913         }
3914
3915         if (vif->type == NL80211_IFTYPE_STATION) {
3916                 struct iwl_mvm_sta *mvmsta;
3917
3918                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3919                                                           mvmvif->ap_sta_id);
3920
3921                 if (WARN_ON(!mvmsta)) {
3922                         ret = -EIO;
3923                         goto out_unlock;
3924                 }
3925
3926                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3927
3928                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3929
3930                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3931                 if (ret)
3932                         goto out_unlock;
3933
3934                 iwl_mvm_stop_session_protection(mvm, vif);
3935         }
3936
3937         mvmvif->ps_disabled = false;
3938
3939         ret = iwl_mvm_power_update_ps(mvm);
3940
3941 out_unlock:
3942         mutex_unlock(&mvm->mutex);
3943
3944         return ret;
3945 }
3946
3947 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3948                               struct ieee80211_vif *vif, u32 queues, bool drop)
3949 {
3950         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3951         struct iwl_mvm_vif *mvmvif;
3952         struct iwl_mvm_sta *mvmsta;
3953         struct ieee80211_sta *sta;
3954         int i;
3955         u32 msk = 0;
3956
3957         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3958                 return;
3959
3960         mutex_lock(&mvm->mutex);
3961         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3962
3963         /* flush the AP-station and all TDLS peers */
3964         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3965                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3966                                                 lockdep_is_held(&mvm->mutex));
3967                 if (IS_ERR_OR_NULL(sta))
3968                         continue;
3969
3970                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3971                 if (mvmsta->vif != vif)
3972                         continue;
3973
3974                 /* make sure only TDLS peers or the AP are flushed */
3975                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3976
3977                 msk |= mvmsta->tfd_queue_msk;
3978         }
3979
3980         if (drop) {
3981                 if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3982                         IWL_ERR(mvm, "flush request fail\n");
3983                 mutex_unlock(&mvm->mutex);
3984         } else {
3985                 mutex_unlock(&mvm->mutex);
3986
3987                 /* this can take a while, and we may need/want other operations
3988                  * to succeed while doing this, so do it without the mutex held
3989                  */
3990                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3991         }
3992 }
3993
3994 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3995                                   struct survey_info *survey)
3996 {
3997         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3998         int ret;
3999
4000         memset(survey, 0, sizeof(*survey));
4001
4002         /* only support global statistics right now */
4003         if (idx != 0)
4004                 return -ENOENT;
4005
4006         if (!fw_has_capa(&mvm->fw->ucode_capa,
4007                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
4008                 return -ENOENT;
4009
4010         mutex_lock(&mvm->mutex);
4011
4012         if (mvm->ucode_loaded) {
4013                 ret = iwl_mvm_request_statistics(mvm, false);
4014                 if (ret)
4015                         goto out;
4016         }
4017
4018         survey->filled = SURVEY_INFO_TIME |
4019                          SURVEY_INFO_TIME_RX |
4020                          SURVEY_INFO_TIME_TX |
4021                          SURVEY_INFO_TIME_SCAN;
4022         survey->time = mvm->accu_radio_stats.on_time_rf +
4023                        mvm->radio_stats.on_time_rf;
4024         do_div(survey->time, USEC_PER_MSEC);
4025
4026         survey->time_rx = mvm->accu_radio_stats.rx_time +
4027                           mvm->radio_stats.rx_time;
4028         do_div(survey->time_rx, USEC_PER_MSEC);
4029
4030         survey->time_tx = mvm->accu_radio_stats.tx_time +
4031                           mvm->radio_stats.tx_time;
4032         do_div(survey->time_tx, USEC_PER_MSEC);
4033
4034         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
4035                             mvm->radio_stats.on_time_scan;
4036         do_div(survey->time_scan, USEC_PER_MSEC);
4037
4038         ret = 0;
4039  out:
4040         mutex_unlock(&mvm->mutex);
4041         return ret;
4042 }
4043
4044 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
4045                                        struct ieee80211_vif *vif,
4046                                        struct ieee80211_sta *sta,
4047                                        struct station_info *sinfo)
4048 {
4049         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4050         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4051         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4052
4053         if (!fw_has_capa(&mvm->fw->ucode_capa,
4054                          IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
4055                 return;
4056
4057         /* if beacon filtering isn't on mac80211 does it anyway */
4058         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
4059                 return;
4060
4061         if (!vif->bss_conf.assoc)
4062                 return;
4063
4064         mutex_lock(&mvm->mutex);
4065
4066         if (mvmvif->ap_sta_id != mvmsta->sta_id)
4067                 goto unlock;
4068
4069         if (iwl_mvm_request_statistics(mvm, false))
4070                 goto unlock;
4071
4072         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
4073                            mvmvif->beacon_stats.accu_num_beacons;
4074         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
4075         if (mvmvif->beacon_stats.avg_signal) {
4076                 /* firmware only reports a value after RXing a few beacons */
4077                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
4078                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
4079         }
4080  unlock:
4081         mutex_unlock(&mvm->mutex);
4082 }
4083
4084 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4085                                         struct ieee80211_vif *vif,
4086                                         const struct ieee80211_event *event)
4087 {
4088 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4089         do {                                                    \
4090                 if ((_cnt) && --(_cnt))                         \
4091                         break;                                  \
4092                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4093         } while (0)
4094
4095         struct iwl_fw_dbg_trigger_tlv *trig;
4096         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4097
4098         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4099                 return;
4100
4101         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4102         trig_mlme = (void *)trig->data;
4103         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4104                 return;
4105
4106         if (event->u.mlme.data == ASSOC_EVENT) {
4107                 if (event->u.mlme.status == MLME_DENIED)
4108                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4109                                            trig_mlme->stop_assoc_denied,
4110                                            "DENIED ASSOC: reason %d",
4111                                             event->u.mlme.reason);
4112                 else if (event->u.mlme.status == MLME_TIMEOUT)
4113                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4114                                            trig_mlme->stop_assoc_timeout,
4115                                            "ASSOC TIMEOUT");
4116         } else if (event->u.mlme.data == AUTH_EVENT) {
4117                 if (event->u.mlme.status == MLME_DENIED)
4118                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4119                                            trig_mlme->stop_auth_denied,
4120                                            "DENIED AUTH: reason %d",
4121                                            event->u.mlme.reason);
4122                 else if (event->u.mlme.status == MLME_TIMEOUT)
4123                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4124                                            trig_mlme->stop_auth_timeout,
4125                                            "AUTH TIMEOUT");
4126         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4127                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4128                                    trig_mlme->stop_rx_deauth,
4129                                    "DEAUTH RX %d", event->u.mlme.reason);
4130         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4131                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4132                                    trig_mlme->stop_tx_deauth,
4133                                    "DEAUTH TX %d", event->u.mlme.reason);
4134         }
4135 #undef CHECK_MLME_TRIGGER
4136 }
4137
4138 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4139                                           struct ieee80211_vif *vif,
4140                                           const struct ieee80211_event *event)
4141 {
4142         struct iwl_fw_dbg_trigger_tlv *trig;
4143         struct iwl_fw_dbg_trigger_ba *ba_trig;
4144
4145         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4146                 return;
4147
4148         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4149         ba_trig = (void *)trig->data;
4150         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4151                 return;
4152
4153         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4154                 return;
4155
4156         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4157                                     "BAR received from %pM, tid %d, ssn %d",
4158                                     event->u.ba.sta->addr, event->u.ba.tid,
4159                                     event->u.ba.ssn);
4160 }
4161
4162 static void
4163 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4164                                      struct ieee80211_vif *vif,
4165                                      const struct ieee80211_event *event)
4166 {
4167         struct iwl_fw_dbg_trigger_tlv *trig;
4168         struct iwl_fw_dbg_trigger_ba *ba_trig;
4169
4170         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4171                 return;
4172
4173         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4174         ba_trig = (void *)trig->data;
4175         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4176                 return;
4177
4178         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4179                 return;
4180
4181         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4182                                     "Frame from %pM timed out, tid %d",
4183                                     event->u.ba.sta->addr, event->u.ba.tid);
4184 }
4185
4186 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4187                                        struct ieee80211_vif *vif,
4188                                        const struct ieee80211_event *event)
4189 {
4190         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4191
4192         switch (event->type) {
4193         case MLME_EVENT:
4194                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4195                 break;
4196         case BAR_RX_EVENT:
4197                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4198                 break;
4199         case BA_FRAME_TIMEOUT:
4200                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4201                 break;
4202         default:
4203                 break;
4204         }
4205 }
4206
4207 const struct ieee80211_ops iwl_mvm_hw_ops = {
4208         .tx = iwl_mvm_mac_tx,
4209         .ampdu_action = iwl_mvm_mac_ampdu_action,
4210         .start = iwl_mvm_mac_start,
4211         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4212         .stop = iwl_mvm_mac_stop,
4213         .add_interface = iwl_mvm_mac_add_interface,
4214         .remove_interface = iwl_mvm_mac_remove_interface,
4215         .config = iwl_mvm_mac_config,
4216         .prepare_multicast = iwl_mvm_prepare_multicast,
4217         .configure_filter = iwl_mvm_configure_filter,
4218         .config_iface_filter = iwl_mvm_config_iface_filter,
4219         .bss_info_changed = iwl_mvm_bss_info_changed,
4220         .hw_scan = iwl_mvm_mac_hw_scan,
4221         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4222         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4223         .sta_state = iwl_mvm_mac_sta_state,
4224         .sta_notify = iwl_mvm_mac_sta_notify,
4225         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4226         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4227         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4228         .sta_rc_update = iwl_mvm_sta_rc_update,
4229         .conf_tx = iwl_mvm_mac_conf_tx,
4230         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4231         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4232         .flush = iwl_mvm_mac_flush,
4233         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4234         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4235         .set_key = iwl_mvm_mac_set_key,
4236         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4237         .remain_on_channel = iwl_mvm_roc,
4238         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4239         .add_chanctx = iwl_mvm_add_chanctx,
4240         .remove_chanctx = iwl_mvm_remove_chanctx,
4241         .change_chanctx = iwl_mvm_change_chanctx,
4242         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4243         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4244         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4245
4246         .start_ap = iwl_mvm_start_ap_ibss,
4247         .stop_ap = iwl_mvm_stop_ap_ibss,
4248         .join_ibss = iwl_mvm_start_ap_ibss,
4249         .leave_ibss = iwl_mvm_stop_ap_ibss,
4250
4251         .set_tim = iwl_mvm_set_tim,
4252
4253         .channel_switch = iwl_mvm_channel_switch,
4254         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4255         .post_channel_switch = iwl_mvm_post_channel_switch,
4256
4257         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4258         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4259         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4260
4261         .event_callback = iwl_mvm_mac_event_callback,
4262
4263         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4264
4265 #ifdef CONFIG_PM_SLEEP
4266         /* look at d3.c */
4267         .suspend = iwl_mvm_suspend,
4268         .resume = iwl_mvm_resume,
4269         .set_wakeup = iwl_mvm_set_wakeup,
4270         .set_rekey_data = iwl_mvm_set_rekey_data,
4271 #if IS_ENABLED(CONFIG_IPV6)
4272         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4273 #endif
4274         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4275 #endif
4276         .get_survey = iwl_mvm_mac_get_survey,
4277         .sta_statistics = iwl_mvm_mac_sta_statistics,
4278 };