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