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
 576         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 577                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 578                                NL80211_FEATURE_P2P_GO_OPPPS |
 579                                NL80211_FEATURE_DYNAMIC_SMPS |
 580                                NL80211_FEATURE_STATIC_SMPS |
 581                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 582
 583         if (fw_has_capa(&mvm->fw->ucode_capa,
 584                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
 585                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 586         if (fw_has_capa(&mvm->fw->ucode_capa,
 587                         IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
 588                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 589
 590         if (fw_has_capa(&mvm->fw->ucode_capa,
 591                         IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
 592                 hw->wiphy->features |=
 593                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 594
 595         if (fw_has_capa(&mvm->fw->ucode_capa,
 596                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 597                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 598
 599         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 600
 601 #ifdef CONFIG_PM_SLEEP
 602         if (iwl_mvm_is_d0i3_supported(mvm) &&
 603             device_can_wakeup(mvm->trans->dev)) {
 604                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 605                 hw->wiphy->wowlan = &mvm->wowlan;
 606         }
 607
 608         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 609             mvm->trans->ops->d3_suspend &&
 610             mvm->trans->ops->d3_resume &&
 611             device_can_wakeup(mvm->trans->dev)) {
 612                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 613                                      WIPHY_WOWLAN_DISCONNECT |
 614                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 615                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 616                                      WIPHY_WOWLAN_NET_DETECT;
 617                 if (!iwlwifi_mod_params.sw_crypto)
 618                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 619                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 620                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 621
 622                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 623                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 624                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 625                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 626                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 627                 hw->wiphy->wowlan = &mvm->wowlan;
 628         }
 629 #endif
 630
 631 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 632         /* assign default bcast filtering configuration */
 633         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 634 #endif
 635
 636         ret = iwl_mvm_leds_init(mvm);
 637         if (ret)
 638                 return ret;
 639
 640         if (fw_has_capa(&mvm->fw->ucode_capa,
 641                         IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
 642                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 643                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 644                 ieee80211_hw_set(hw, TDLS_WIDER_BW);
 645         }
 646
 647         if (fw_has_capa(&mvm->fw->ucode_capa,
 648                         IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
 649                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 650                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 651         }
 652
 653         hw->netdev_features |= mvm->cfg->features;
 654         if (!iwl_mvm_is_csum_supported(mvm))
 655                 hw->netdev_features &= ~NETIF_F_RXCSUM;
 656
 657         ret = ieee80211_register_hw(mvm->hw);
 658         if (ret)
 659                 iwl_mvm_leds_exit(mvm);
 660
 661         return ret;
 662 }
 663
 664 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 665                              struct ieee80211_sta *sta,
 666                              struct sk_buff *skb)
 667 {
 668         struct iwl_mvm_sta *mvmsta;
 669         bool defer = false;
 670
 671         /*
 672          * double check the IN_D0I3 flag both before and after
 673          * taking the spinlock, in order to prevent taking
 674          * the spinlock when not needed.
 675          */
 676         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 677                 return false;
 678
 679         spin_lock(&mvm->d0i3_tx_lock);
 680         /*
 681          * testing the flag again ensures the skb dequeue
 682          * loop (on d0i3 exit) hasn't run yet.
 683          */
 684         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 685                 goto out;
 686
 687         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 688         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 689             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 690                 goto out;
 691
 692         __skb_queue_tail(&mvm->d0i3_tx, skb);
 693         ieee80211_stop_queues(mvm->hw);
 694
 695         /* trigger wakeup */
 696         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 697         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 698
 699         defer = true;
 700 out:
 701         spin_unlock(&mvm->d0i3_tx_lock);
 702         return defer;
 703 }
 704
 705 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 706                            struct ieee80211_tx_control *control,
 707                            struct sk_buff *skb)
 708 {
 709         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 710         struct ieee80211_sta *sta = control->sta;
 711         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 712         struct ieee80211_hdr *hdr = (void *)skb->data;
 713
 714         if (iwl_mvm_is_radio_killed(mvm)) {
 715                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 716                 goto drop;
 717         }
 718
 719         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 720             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 721             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 722                 goto drop;
 723
 724         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 725         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 726                      ieee80211_is_mgmt(hdr->frame_control) &&
 727                      !ieee80211_is_deauth(hdr->frame_control) &&
 728                      !ieee80211_is_disassoc(hdr->frame_control) &&
 729                      !ieee80211_is_action(hdr->frame_control)))
 730                 sta = NULL;
 731
 732         if (sta) {
 733                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 734                         return;
 735                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 736                         goto drop;
 737                 return;
 738         }
 739
 740         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 741                 goto drop;
 742         return;
 743  drop:
 744         ieee80211_free_txskb(hw, skb);
 745 }
 746
 747 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 748 {
 749         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 750                 return false;
 751         return true;
 752 }
 753
 754 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 755 {
 756         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 757                 return false;
 758         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 759                 return true;
 760
 761         /* enabled by default */
 762         return true;
 763 }
 764
 765 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)   \
 766         do {                                                    \
 767                 if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))        \
 768                         break;                                  \
 769                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt); \
 770         } while (0)
 771
 772 static void
 773 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 774                             struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
 775                             enum ieee80211_ampdu_mlme_action action)
 776 {
 777         struct iwl_fw_dbg_trigger_tlv *trig;
 778         struct iwl_fw_dbg_trigger_ba *ba_trig;
 779
 780         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
 781                 return;
 782
 783         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
 784         ba_trig = (void *)trig->data;
 785
 786         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
 787                 return;
 788
 789         switch (action) {
 790         case IEEE80211_AMPDU_TX_OPERATIONAL: {
 791                 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 792                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
 793
 794                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
 795                                  "TX AGG START: MAC %pM tid %d ssn %d\n",
 796                                  sta->addr, tid, tid_data->ssn);
 797                 break;
 798                 }
 799         case IEEE80211_AMPDU_TX_STOP_CONT:
 800                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
 801                                  "TX AGG STOP: MAC %pM tid %d\n",
 802                                  sta->addr, tid);
 803                 break;
 804         case IEEE80211_AMPDU_RX_START:
 805                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
 806                                  "RX AGG START: MAC %pM tid %d ssn %d\n",
 807                                  sta->addr, tid, rx_ba_ssn);
 808                 break;
 809         case IEEE80211_AMPDU_RX_STOP:
 810                 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
 811                                  "RX AGG STOP: MAC %pM tid %d\n",
 812                                  sta->addr, tid);
 813                 break;
 814         default:
 815                 break;
 816         }
 817 }
 818
 819 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 820                                     struct ieee80211_vif *vif,
 821                                     enum ieee80211_ampdu_mlme_action action,
 822                                     struct ieee80211_sta *sta, u16 tid,
 823                                     u16 *ssn, u8 buf_size)
 824 {
 825         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 826         int ret;
 827         bool tx_agg_ref = false;
 828
 829         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 830                      sta->addr, tid, action);
 831
 832         if (!(mvm->nvm_data->sku_cap_11n_enable))
 833                 return -EACCES;
 834
 835         /* return from D0i3 before starting a new Tx aggregation */
 836         switch (action) {
 837         case IEEE80211_AMPDU_TX_START:
 838         case IEEE80211_AMPDU_TX_STOP_CONT:
 839         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 840         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 841         case IEEE80211_AMPDU_TX_OPERATIONAL:
 842                 /*
 843                  * for tx start, wait synchronously until D0i3 exit to
 844                  * get the correct sequence number for the tid.
 845                  * additionally, some other ampdu actions use direct
 846                  * target access, which is not handled automatically
 847                  * by the trans layer (unlike commands), so wait for
 848                  * d0i3 exit in these cases as well.
 849                  */
 850                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 851                 if (ret)
 852                         return ret;
 853
 854                 tx_agg_ref = true;
 855                 break;
 856         default:
 857                 break;
 858         }
 859
 860         mutex_lock(&mvm->mutex);
 861
 862         switch (action) {
 863         case IEEE80211_AMPDU_RX_START:
 864                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 865                         ret = -EINVAL;
 866                         break;
 867                 }
 868                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 869                 break;
 870         case IEEE80211_AMPDU_RX_STOP:
 871                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 872                 break;
 873         case IEEE80211_AMPDU_TX_START:
 874                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 875                         ret = -EINVAL;
 876                         break;
 877                 }
 878                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 879                 break;
 880         case IEEE80211_AMPDU_TX_STOP_CONT:
 881                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 882                 break;
 883         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 884         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 885                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 886                 break;
 887         case IEEE80211_AMPDU_TX_OPERATIONAL:
 888                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 889                 break;
 890         default:
 891                 WARN_ON_ONCE(1);
 892                 ret = -EINVAL;
 893                 break;
 894         }
 895
 896         if (!ret) {
 897                 u16 rx_ba_ssn = 0;
 898
 899                 if (action == IEEE80211_AMPDU_RX_START)
 900                         rx_ba_ssn = *ssn;
 901
 902                 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
 903                                             rx_ba_ssn, action);
 904         }
 905         mutex_unlock(&mvm->mutex);
 906
 907         /*
 908          * If the tid is marked as started, we won't use it for offloaded
 909          * traffic on the next D0i3 entry. It's safe to unref.
 910          */
 911         if (tx_agg_ref)
 912                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 913
 914         return ret;
 915 }
 916
 917 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 918                                      struct ieee80211_vif *vif)
 919 {
 920         struct iwl_mvm *mvm = data;
 921         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 922
 923         mvmvif->uploaded = false;
 924         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 925
 926         spin_lock_bh(&mvm->time_event_lock);
 927         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 928         spin_unlock_bh(&mvm->time_event_lock);
 929
 930         mvmvif->phy_ctxt = NULL;
 931         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 932 }
 933
 934 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 935                                      const void *data, size_t datalen)
 936 {
 937         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 938         ssize_t bytes_read;
 939         ssize_t bytes_read_trans;
 940
 941         if (offset < dump_ptrs->op_mode_len) {
 942                 bytes_read = min_t(ssize_t, count,
 943                                    dump_ptrs->op_mode_len - offset);
 944                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 945                        bytes_read);
 946                 offset += bytes_read;
 947                 count -= bytes_read;
 948
 949                 if (count == 0)
 950                         return bytes_read;
 951         } else {
 952                 bytes_read = 0;
 953         }
 954
 955         if (!dump_ptrs->trans_ptr)
 956                 return bytes_read;
 957
 958         offset -= dump_ptrs->op_mode_len;
 959         bytes_read_trans = min_t(ssize_t, count,
 960                                  dump_ptrs->trans_ptr->len - offset);
 961         memcpy(buffer + bytes_read,
 962                (u8 *)dump_ptrs->trans_ptr->data + offset,
 963                bytes_read_trans);
 964
 965         return bytes_read + bytes_read_trans;
 966 }
 967
 968 static void iwl_mvm_free_coredump(const void *data)
 969 {
 970         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 971
 972         vfree(fw_error_dump->op_mode_ptr);
 973         vfree(fw_error_dump->trans_ptr);
 974         kfree(fw_error_dump);
 975 }
 976
 977 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 978                                struct iwl_fw_error_dump_data **dump_data)
 979 {
 980         struct iwl_fw_error_dump_fifo *fifo_hdr;
 981         u32 *fifo_data;
 982         u32 fifo_len;
 983         unsigned long flags;
 984         int i, j;
 985
 986         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 987                 return;
 988
 989         /* Pull RXF data from all RXFs */
 990         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
 991                 /*
 992                  * Keep aside the additional offset that might be needed for
 993                  * next RXF
 994                  */
 995                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
 996
 997                 fifo_hdr = (void *)(*dump_data)->data;
 998                 fifo_data = (void *)fifo_hdr->data;
 999                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
1000
1001                 /* No need to try to read the data if the length is 0 */
1002                 if (fifo_len == 0)
1003                         continue;
1004
1005                 /* Add a TLV for the RXF */
1006                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
1007                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1008
1009                 fifo_hdr->fifo_num = cpu_to_le32(i);
1010                 fifo_hdr->available_bytes =
1011                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1012                                                         RXF_RD_D_SPACE +
1013                                                         offset_diff));
1014                 fifo_hdr->wr_ptr =
1015                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1016                                                         RXF_RD_WR_PTR +
1017                                                         offset_diff));
1018                 fifo_hdr->rd_ptr =
1019                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1020                                                         RXF_RD_RD_PTR +
1021                                                         offset_diff));
1022                 fifo_hdr->fence_ptr =
1023                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1024                                                         RXF_RD_FENCE_PTR +
1025                                                         offset_diff));
1026                 fifo_hdr->fence_mode =
1027                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1028                                                         RXF_SET_FENCE_MODE +
1029                                                         offset_diff));
1030
1031                 /* Lock fence */
1032                 iwl_trans_write_prph(mvm->trans,
1033                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
1034                 /* Set fence pointer to the same place like WR pointer */
1035                 iwl_trans_write_prph(mvm->trans,
1036                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
1037                 /* Set fence offset */
1038                 iwl_trans_write_prph(mvm->trans,
1039                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
1040                                      0x0);
1041
1042                 /* Read FIFO */
1043                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1044                 for (j = 0; j < fifo_len; j++)
1045                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1046                                                          RXF_FIFO_RD_FENCE_INC +
1047                                                          offset_diff);
1048                 *dump_data = iwl_fw_error_next_data(*dump_data);
1049         }
1050
1051         /* Pull TXF data from all TXFs */
1052         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
1053                 /* Mark the number of TXF we're pulling now */
1054                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
1055
1056                 fifo_hdr = (void *)(*dump_data)->data;
1057                 fifo_data = (void *)fifo_hdr->data;
1058                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
1059
1060                 /* No need to try to read the data if the length is 0 */
1061                 if (fifo_len == 0)
1062                         continue;
1063
1064                 /* Add a TLV for the FIFO */
1065                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
1066                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
1067
1068                 fifo_hdr->fifo_num = cpu_to_le32(i);
1069                 fifo_hdr->available_bytes =
1070                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1071                                                         TXF_FIFO_ITEM_CNT));
1072                 fifo_hdr->wr_ptr =
1073                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1074                                                         TXF_WR_PTR));
1075                 fifo_hdr->rd_ptr =
1076                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1077                                                         TXF_RD_PTR));
1078                 fifo_hdr->fence_ptr =
1079                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1080                                                         TXF_FENCE_PTR));
1081                 fifo_hdr->fence_mode =
1082                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
1083                                                         TXF_LOCK_FENCE));
1084
1085                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
1086                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
1087                                      TXF_WR_PTR);
1088
1089                 /* Dummy-read to advance the read pointer to the head */
1090                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
1091
1092                 /* Read FIFO */
1093                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1094                 for (j = 0; j < fifo_len; j++)
1095                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1096                                                           TXF_READ_MODIFY_DATA);
1097                 *dump_data = iwl_fw_error_next_data(*dump_data);
1098         }
1099
1100         iwl_trans_release_nic_access(mvm->trans, &flags);
1101 }
1102
1103 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1104 {
1105         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1106             !mvm->fw_dump_desc)
1107                 return;
1108
1109         kfree(mvm->fw_dump_desc);
1110         mvm->fw_dump_desc = NULL;
1111 }
1112
1113 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1114 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1115
1116 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1117 {
1118         struct iwl_fw_error_dump_file *dump_file;
1119         struct iwl_fw_error_dump_data *dump_data;
1120         struct iwl_fw_error_dump_info *dump_info;
1121         struct iwl_fw_error_dump_mem *dump_mem;
1122         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1123         struct iwl_mvm_dump_ptrs *fw_error_dump;
1124         u32 sram_len, sram_ofs;
1125         u32 file_len, fifo_data_len = 0;
1126         u32 smem_len = mvm->cfg->smem_len;
1127         u32 sram2_len = mvm->cfg->dccm2_len;
1128         bool monitor_dump_only = false;
1129
1130         lockdep_assert_held(&mvm->mutex);
1131
1132         if (mvm->fw_dump_trig &&
1133             mvm->fw_dump_trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
1134                 monitor_dump_only = true;
1135
1136         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1137         if (!fw_error_dump)
1138                 return;
1139
1140         /* SRAM - include stack CCM if driver knows the values for it */
1141         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1142                 const struct fw_img *img;
1143
1144                 img = &mvm->fw->img[mvm->cur_ucode];
1145                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1146                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1147         } else {
1148                 sram_ofs = mvm->cfg->dccm_offset;
1149                 sram_len = mvm->cfg->dccm_len;
1150         }
1151
1152         /* reading RXF/TXF sizes */
1153         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1154                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1155                 int i;
1156
1157                 fifo_data_len = 0;
1158
1159                 /* Count RXF size */
1160                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1161                         if (!mem_cfg->rxfifo_size[i])
1162                                 continue;
1163
1164                         /* Add header info */
1165                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1166                                          sizeof(*dump_data) +
1167                                          sizeof(struct iwl_fw_error_dump_fifo);
1168                 }
1169
1170                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1171                         if (!mem_cfg->txfifo_size[i])
1172                                 continue;
1173
1174                         /* Add header info */
1175                         fifo_data_len += mem_cfg->txfifo_size[i] +
1176                                          sizeof(*dump_data) +
1177                                          sizeof(struct iwl_fw_error_dump_fifo);
1178                 }
1179         }
1180
1181         file_len = sizeof(*dump_file) +
1182                    sizeof(*dump_data) * 2 +
1183                    sram_len + sizeof(*dump_mem) +
1184                    fifo_data_len +
1185                    sizeof(*dump_info);
1186
1187         /* Make room for the SMEM, if it exists */
1188         if (smem_len)
1189                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1190
1191         /* Make room for the secondary SRAM, if it exists */
1192         if (sram2_len)
1193                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1194
1195         /* If we only want a monitor dump, reset the file length */
1196         if (monitor_dump_only) {
1197                 file_len = sizeof(*dump_file) + sizeof(*dump_data) +
1198                            sizeof(*dump_info);
1199         }
1200
1201         /*
1202          * In 8000 HW family B-step include the ICCM (which resides separately)
1203          */
1204         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1205             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1206                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1207                             IWL8260_ICCM_LEN;
1208
1209         if (mvm->fw_dump_desc)
1210                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1211                             mvm->fw_dump_desc->len;
1212
1213         dump_file = vzalloc(file_len);
1214         if (!dump_file) {
1215                 kfree(fw_error_dump);
1216                 iwl_mvm_free_fw_dump_desc(mvm);
1217                 return;
1218         }
1219
1220         fw_error_dump->op_mode_ptr = dump_file;
1221
1222         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1223         dump_data = (void *)dump_file->data;
1224
1225         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1226         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1227         dump_info = (void *) dump_data->data;
1228         dump_info->device_family =
1229                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1230                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1231                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1232         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1233         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1234                sizeof(dump_info->fw_human_readable));
1235         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1236                 sizeof(dump_info->dev_human_readable));
1237         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1238                 sizeof(dump_info->bus_human_readable));
1239
1240         dump_data = iwl_fw_error_next_data(dump_data);
1241         /* We only dump the FIFOs if the FW is in error state */
1242         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1243                 iwl_mvm_dump_fifos(mvm, &dump_data);
1244
1245         if (mvm->fw_dump_desc) {
1246                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1247                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1248                                              mvm->fw_dump_desc->len);
1249                 dump_trig = (void *)dump_data->data;
1250                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1251                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1252
1253                 /* now we can free this copy */
1254                 iwl_mvm_free_fw_dump_desc(mvm);
1255                 dump_data = iwl_fw_error_next_data(dump_data);
1256         }
1257
1258         /* In case we only want monitor dump, skip to dump trasport data */
1259         if (monitor_dump_only)
1260                 goto dump_trans_data;
1261
1262         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1263         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1264         dump_mem = (void *)dump_data->data;
1265         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1266         dump_mem->offset = cpu_to_le32(sram_ofs);
1267         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1268                                  sram_len);
1269
1270         if (smem_len) {
1271                 dump_data = iwl_fw_error_next_data(dump_data);
1272                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1273                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1274                 dump_mem = (void *)dump_data->data;
1275                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1276                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1277                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1278                                          dump_mem->data, smem_len);
1279         }
1280
1281         if (sram2_len) {
1282                 dump_data = iwl_fw_error_next_data(dump_data);
1283                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1284                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1285                 dump_mem = (void *)dump_data->data;
1286                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1287                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1288                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1289                                          dump_mem->data, sram2_len);
1290         }
1291
1292         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1293             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1294                 dump_data = iwl_fw_error_next_data(dump_data);
1295                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1296                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1297                                              sizeof(*dump_mem));
1298                 dump_mem = (void *)dump_data->data;
1299                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1300                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1301                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1302                                          dump_mem->data, IWL8260_ICCM_LEN);
1303         }
1304
1305 dump_trans_data:
1306         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,
1307                                                        mvm->fw_dump_trig);
1308         fw_error_dump->op_mode_len = file_len;
1309         if (fw_error_dump->trans_ptr)
1310                 file_len += fw_error_dump->trans_ptr->len;
1311         dump_file->file_len = cpu_to_le32(file_len);
1312
1313         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1314                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1315
1316         mvm->fw_dump_trig = NULL;
1317         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1318 }
1319
1320 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1321         .trig_desc = {
1322                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1323         },
1324 };
1325
1326 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1327 {
1328         /* clear the D3 reconfig, we only need it to avoid dumping a
1329          * firmware coredump on reconfiguration, we shouldn't do that
1330          * on D3->D0 transition
1331          */
1332         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1333                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1334                 iwl_mvm_fw_error_dump(mvm);
1335         }
1336
1337         /* cleanup all stale references (scan, roc), but keep the
1338          * ucode_down ref until reconfig is complete
1339          */
1340         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1341
1342         iwl_trans_stop_device(mvm->trans);
1343
1344         mvm->scan_status = 0;
1345         mvm->ps_disabled = false;
1346         mvm->calibrating = false;
1347
1348         /* just in case one was running */
1349         ieee80211_remain_on_channel_expired(mvm->hw);
1350
1351         /*
1352          * cleanup all interfaces, even inactive ones, as some might have
1353          * gone down during the HW restart
1354          */
1355         ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
1356
1357         mvm->p2p_device_vif = NULL;
1358         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1359
1360         iwl_mvm_reset_phy_ctxts(mvm);
1361         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1362         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1363         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1364         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1365         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1366         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1367         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1368         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1369
1370         ieee80211_wake_queues(mvm->hw);
1371
1372         /* clear any stale d0i3 state */
1373         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1374
1375         mvm->vif_count = 0;
1376         mvm->rx_ba_sessions = 0;
1377         mvm->fw_dbg_conf = FW_DBG_INVALID;
1378
1379         /* keep statistics ticking */
1380         iwl_mvm_accu_radio_stats(mvm);
1381 }
1382
1383 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1384 {
1385         int ret;
1386
1387         lockdep_assert_held(&mvm->mutex);
1388
1389         /* Clean up some internal and mac80211 state on restart */
1390         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1391                 iwl_mvm_restart_cleanup(mvm);
1392
1393         ret = iwl_mvm_up(mvm);
1394
1395         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1396                 /* Something went wrong - we need to finish some cleanup
1397                  * that normally iwl_mvm_mac_restart_complete() below
1398                  * would do.
1399                  */
1400                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1401                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1402         }
1403
1404         return ret;
1405 }
1406
1407 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1408 {
1409         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1410         int ret;
1411
1412         /* Some hw restart cleanups must not hold the mutex */
1413         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1414                 /*
1415                  * Make sure we are out of d0i3. This is needed
1416                  * to make sure the reference accounting is correct
1417                  * (and there is no stale d0i3_exit_work).
1418                  */
1419                 wait_event_timeout(mvm->d0i3_exit_waitq,
1420                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1421                                              &mvm->status),
1422                                    HZ);
1423         }
1424
1425         mutex_lock(&mvm->mutex);
1426         ret = __iwl_mvm_mac_start(mvm);
1427         mutex_unlock(&mvm->mutex);
1428
1429         return ret;
1430 }
1431
1432 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1433 {
1434         int ret;
1435
1436         mutex_lock(&mvm->mutex);
1437
1438         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1439         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1440         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1441         if (ret)
1442                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1443                         ret);
1444
1445         /* allow transport/FW low power modes */
1446         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1447
1448         /*
1449          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1450          * of packets the FW sent out, so we must reconnect.
1451          */
1452         iwl_mvm_teardown_tdls_peers(mvm);
1453
1454         mutex_unlock(&mvm->mutex);
1455 }
1456
1457 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1458 {
1459         if (!iwl_mvm_is_d0i3_supported(mvm))
1460                 return;
1461
1462         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1463                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1464                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1465                                                   &mvm->status),
1466                                         HZ))
1467                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1468 }
1469
1470 static void
1471 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1472                               enum ieee80211_reconfig_type reconfig_type)
1473 {
1474         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1475
1476         switch (reconfig_type) {
1477         case IEEE80211_RECONFIG_TYPE_RESTART:
1478                 iwl_mvm_restart_complete(mvm);
1479                 break;
1480         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1481                 iwl_mvm_resume_complete(mvm);
1482                 break;
1483         }
1484 }
1485
1486 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1487 {
1488         lockdep_assert_held(&mvm->mutex);
1489
1490         /* firmware counters are obviously reset now, but we shouldn't
1491          * partially track so also clear the fw_reset_accu counters.
1492          */
1493         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1494
1495         /*
1496          * Disallow low power states when the FW is down by taking
1497          * the UCODE_DOWN ref. in case of ongoing hw restart the
1498          * ref is already taken, so don't take it again.
1499          */
1500         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1501                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1502
1503         /* async_handlers_wk is now blocked */
1504
1505         /*
1506          * The work item could be running or queued if the
1507          * ROC time event stops just as we get here.
1508          */
1509         flush_work(&mvm->roc_done_wk);
1510
1511         iwl_trans_stop_device(mvm->trans);
1512
1513         iwl_mvm_async_handlers_purge(mvm);
1514         /* async_handlers_list is empty and will stay empty: HW is stopped */
1515
1516         /* the fw is stopped, the aux sta is dead: clean up driver state */
1517         iwl_mvm_del_aux_sta(mvm);
1518
1519         /*
1520          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1521          * won't be called in this case).
1522          * But make sure to cleanup interfaces that have gone down before/during
1523          * HW restart was requested.
1524          */
1525         if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1526                 ieee80211_iterate_interfaces(mvm->hw, 0,
1527                                              iwl_mvm_cleanup_iterator, mvm);
1528
1529         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1530          * make sure there's nothing left there and warn if any is found.
1531          */
1532         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1533                 int i;
1534
1535                 for (i = 0; i < mvm->max_scans; i++) {
1536                         if (WARN_ONCE(mvm->scan_uid_status[i],
1537                                       "UMAC scan UID %d status was not cleaned\n",
1538                                       i))
1539                                 mvm->scan_uid_status[i] = 0;
1540                 }
1541         }
1542
1543         mvm->ucode_loaded = false;
1544 }
1545
1546 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1547 {
1548         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1549
1550         flush_work(&mvm->d0i3_exit_work);
1551         flush_work(&mvm->async_handlers_wk);
1552         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1553         iwl_mvm_free_fw_dump_desc(mvm);
1554
1555         mutex_lock(&mvm->mutex);
1556         __iwl_mvm_mac_stop(mvm);
1557         mutex_unlock(&mvm->mutex);
1558
1559         /*
1560          * The worker might have been waiting for the mutex, let it run and
1561          * discover that its list is now empty.
1562          */
1563         cancel_work_sync(&mvm->async_handlers_wk);
1564 }
1565
1566 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1567 {
1568         u16 i;
1569
1570         lockdep_assert_held(&mvm->mutex);
1571
1572         for (i = 0; i < NUM_PHY_CTX; i++)
1573                 if (!mvm->phy_ctxts[i].ref)
1574                         return &mvm->phy_ctxts[i];
1575
1576         IWL_ERR(mvm, "No available PHY context\n");
1577         return NULL;
1578 }
1579
1580 static int iwl_mvm_set_tx_power_old(struct iwl_mvm *mvm,
1581                                     struct ieee80211_vif *vif, s8 tx_power)
1582 {
1583         /* FW is in charge of regulatory enforcement */
1584         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1585                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1586                 .pwr_restriction = cpu_to_le16(tx_power),
1587         };
1588
1589         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1590                                     sizeof(reduce_txpwr_cmd),
1591                                     &reduce_txpwr_cmd);
1592 }
1593
1594 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1595                                 s16 tx_power)
1596 {
1597         struct iwl_dev_tx_power_cmd cmd = {
1598                 .v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1599                 .v2.mac_context_id =
1600                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1601                 .v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1602         };
1603         int len = sizeof(cmd);
1604
1605         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_DEV))
1606                 return iwl_mvm_set_tx_power_old(mvm, vif, tx_power);
1607
1608         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1609                 cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1610
1611         if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1612                 len = sizeof(cmd.v2);
1613
1614         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1615 }
1616
1617 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1618                                      struct ieee80211_vif *vif)
1619 {
1620         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1621         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1622         int ret;
1623
1624         mvmvif->mvm = mvm;
1625
1626         /*
1627          * make sure D0i3 exit is completed, otherwise a target access
1628          * during tx queue configuration could be done when still in
1629          * D0i3 state.
1630          */
1631         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1632         if (ret)
1633                 return ret;
1634
1635         /*
1636          * Not much to do here. The stack will not allow interface
1637          * types or combinations that we didn't advertise, so we
1638          * don't really have to check the types.
1639          */
1640
1641         mutex_lock(&mvm->mutex);
1642
1643         /* make sure that beacon statistics don't go backwards with FW reset */
1644         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1645                 mvmvif->beacon_stats.accu_num_beacons +=
1646                         mvmvif->beacon_stats.num_beacons;
1647
1648         /* Allocate resources for the MAC context, and add it to the fw  */
1649         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1650         if (ret)
1651                 goto out_unlock;
1652
1653         /* Counting number of interfaces is needed for legacy PM */
1654         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1655                 mvm->vif_count++;
1656
1657         /*
1658          * The AP binding flow can be done only after the beacon
1659          * template is configured (which happens only in the mac80211
1660          * start_ap() flow), and adding the broadcast station can happen
1661          * only after the binding.
1662          * In addition, since modifying the MAC before adding a bcast
1663          * station is not allowed by the FW, delay the adding of MAC context to
1664          * the point where we can also add the bcast station.
1665          * In short: there's not much we can do at this point, other than
1666          * allocating resources :)
1667          */
1668         if (vif->type == NL80211_IFTYPE_AP ||
1669             vif->type == NL80211_IFTYPE_ADHOC) {
1670                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1671                 if (ret) {
1672                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1673                         goto out_release;
1674                 }
1675
1676                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1677                 goto out_unlock;
1678         }
1679
1680         mvmvif->features |= hw->netdev_features;
1681
1682         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1683         if (ret)
1684                 goto out_release;
1685
1686         ret = iwl_mvm_power_update_mac(mvm);
1687         if (ret)
1688                 goto out_remove_mac;
1689
1690         /* beacon filtering */
1691         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1692         if (ret)
1693                 goto out_remove_mac;
1694
1695         if (!mvm->bf_allowed_vif &&
1696             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1697                 mvm->bf_allowed_vif = mvmvif;
1698                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1699                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1700         }
1701
1702         /*
1703          * P2P_DEVICE interface does not have a channel context assigned to it,
1704          * so a dedicated PHY context is allocated to it and the corresponding
1705          * MAC context is bound to it at this stage.
1706          */
1707         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1708
1709                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1710                 if (!mvmvif->phy_ctxt) {
1711                         ret = -ENOSPC;
1712                         goto out_free_bf;
1713                 }
1714
1715                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1716                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1717                 if (ret)
1718                         goto out_unref_phy;
1719
1720                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1721                 if (ret)
1722                         goto out_unbind;
1723
1724                 /* Save a pointer to p2p device vif, so it can later be used to
1725                  * update the p2p device MAC when a GO is started/stopped */
1726                 mvm->p2p_device_vif = vif;
1727         }
1728
1729         iwl_mvm_vif_dbgfs_register(mvm, vif);
1730         goto out_unlock;
1731
1732  out_unbind:
1733         iwl_mvm_binding_remove_vif(mvm, vif);
1734  out_unref_phy:
1735         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1736  out_free_bf:
1737         if (mvm->bf_allowed_vif == mvmvif) {
1738                 mvm->bf_allowed_vif = NULL;
1739                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1740                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1741         }
1742  out_remove_mac:
1743         mvmvif->phy_ctxt = NULL;
1744         iwl_mvm_mac_ctxt_remove(mvm, vif);
1745  out_release:
1746         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1747                 mvm->vif_count--;
1748
1749         iwl_mvm_mac_ctxt_release(mvm, vif);
1750  out_unlock:
1751         mutex_unlock(&mvm->mutex);
1752
1753         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1754
1755         return ret;
1756 }
1757
1758 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1759                                         struct ieee80211_vif *vif)
1760 {
1761         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1762
1763         if (tfd_msk) {
1764                 /*
1765                  * mac80211 first removes all the stations of the vif and
1766                  * then removes the vif. When it removes a station it also
1767                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1768                  * of all the stations of this vif are closed, and the queues
1769                  * of these AMPDU sessions are properly closed.
1770                  * We still need to take care of the shared queues of the vif.
1771                  * Flush them here.
1772                  */
1773                 mutex_lock(&mvm->mutex);
1774                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1775                 mutex_unlock(&mvm->mutex);
1776
1777                 /*
1778                  * There are transports that buffer a few frames in the host.
1779                  * For these, the flush above isn't enough since while we were
1780                  * flushing, the transport might have sent more frames to the
1781                  * device. To solve this, wait here until the transport is
1782                  * empty. Technically, this could have replaced the flush
1783                  * above, but flush is much faster than draining. So flush
1784                  * first, and drain to make sure we have no frames in the
1785                  * transport anymore.
1786                  * If a station still had frames on the shared queues, it is
1787                  * already marked as draining, so to complete the draining, we
1788                  * just need to wait until the transport is empty.
1789                  */
1790                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1791         }
1792
1793         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1794                 /*
1795                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1796                  * We assume here that all the packets sent to the OFFCHANNEL
1797                  * queue are sent in ROC session.
1798                  */
1799                 flush_work(&mvm->roc_done_wk);
1800         } else {
1801                 /*
1802                  * By now, all the AC queues are empty. The AGG queues are
1803                  * empty too. We already got all the Tx responses for all the
1804                  * packets in the queues. The drain work can have been
1805                  * triggered. Flush it.
1806                  */
1807                 flush_work(&mvm->sta_drained_wk);
1808         }
1809 }
1810
1811 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1812                                          struct ieee80211_vif *vif)
1813 {
1814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1815         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1816
1817         iwl_mvm_prepare_mac_removal(mvm, vif);
1818
1819         mutex_lock(&mvm->mutex);
1820
1821         if (mvm->bf_allowed_vif == mvmvif) {
1822                 mvm->bf_allowed_vif = NULL;
1823                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1824                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1825         }
1826
1827         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1828
1829         /*
1830          * For AP/GO interface, the tear down of the resources allocated to the
1831          * interface is be handled as part of the stop_ap flow.
1832          */
1833         if (vif->type == NL80211_IFTYPE_AP ||
1834             vif->type == NL80211_IFTYPE_ADHOC) {
1835 #ifdef CONFIG_NL80211_TESTMODE
1836                 if (vif == mvm->noa_vif) {
1837                         mvm->noa_vif = NULL;
1838                         mvm->noa_duration = 0;
1839                 }
1840 #endif
1841                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1842                 goto out_release;
1843         }
1844
1845         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1846                 mvm->p2p_device_vif = NULL;
1847                 iwl_mvm_rm_bcast_sta(mvm, vif);
1848                 iwl_mvm_binding_remove_vif(mvm, vif);
1849                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1850                 mvmvif->phy_ctxt = NULL;
1851         }
1852
1853         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1854                 mvm->vif_count--;
1855
1856         iwl_mvm_power_update_mac(mvm);
1857         iwl_mvm_mac_ctxt_remove(mvm, vif);
1858
1859 out_release:
1860         iwl_mvm_mac_ctxt_release(mvm, vif);
1861         mutex_unlock(&mvm->mutex);
1862 }
1863
1864 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1865 {
1866         return 0;
1867 }
1868
1869 struct iwl_mvm_mc_iter_data {
1870         struct iwl_mvm *mvm;
1871         int port_id;
1872 };
1873
1874 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1875                                       struct ieee80211_vif *vif)
1876 {
1877         struct iwl_mvm_mc_iter_data *data = _data;
1878         struct iwl_mvm *mvm = data->mvm;
1879         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1880         int ret, len;
1881
1882         /* if we don't have free ports, mcast frames will be dropped */
1883         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1884                 return;
1885
1886         if (vif->type != NL80211_IFTYPE_STATION ||
1887             !vif->bss_conf.assoc)
1888                 return;
1889
1890         cmd->port_id = data->port_id++;
1891         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1892         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1893
1894         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1895         if (ret)
1896                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1897 }
1898
1899 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1900 {
1901         struct iwl_mvm_mc_iter_data iter_data = {
1902                 .mvm = mvm,
1903         };
1904
1905         lockdep_assert_held(&mvm->mutex);
1906
1907         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1908                 return;
1909
1910         ieee80211_iterate_active_interfaces_atomic(
1911                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1912                 iwl_mvm_mc_iface_iterator, &iter_data);
1913 }
1914
1915 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1916                                      struct netdev_hw_addr_list *mc_list)
1917 {
1918         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1919         struct iwl_mcast_filter_cmd *cmd;
1920         struct netdev_hw_addr *addr;
1921         int addr_count;
1922         bool pass_all;
1923         int len;
1924
1925         addr_count = netdev_hw_addr_list_count(mc_list);
1926         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1927                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1928         if (pass_all)
1929                 addr_count = 0;
1930
1931         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1932         cmd = kzalloc(len, GFP_ATOMIC);
1933         if (!cmd)
1934                 return 0;
1935
1936         if (pass_all) {
1937                 cmd->pass_all = 1;
1938                 return (u64)(unsigned long)cmd;
1939         }
1940
1941         netdev_hw_addr_list_for_each(addr, mc_list) {
1942                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1943                                    cmd->count, addr->addr);
1944                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1945                        addr->addr, ETH_ALEN);
1946                 cmd->count++;
1947         }
1948
1949         return (u64)(unsigned long)cmd;
1950 }
1951
1952 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1953                                      unsigned int changed_flags,
1954                                      unsigned int *total_flags,
1955                                      u64 multicast)
1956 {
1957         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1958         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1959
1960         mutex_lock(&mvm->mutex);
1961
1962         /* replace previous configuration */
1963         kfree(mvm->mcast_filter_cmd);
1964         mvm->mcast_filter_cmd = cmd;
1965
1966         if (!cmd)
1967                 goto out;
1968
1969         iwl_mvm_recalc_multicast(mvm);
1970 out:
1971         mutex_unlock(&mvm->mutex);
1972         *total_flags = 0;
1973 }
1974
1975 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1976 struct iwl_bcast_iter_data {
1977         struct iwl_mvm *mvm;
1978         struct iwl_bcast_filter_cmd *cmd;
1979         u8 current_filter;
1980 };
1981
1982 static void
1983 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1984                          const struct iwl_fw_bcast_filter *in_filter,
1985                          struct iwl_fw_bcast_filter *out_filter)
1986 {
1987         struct iwl_fw_bcast_filter_attr *attr;
1988         int i;
1989
1990         memcpy(out_filter, in_filter, sizeof(*out_filter));
1991
1992         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1993                 attr = &out_filter->attrs[i];
1994
1995                 if (!attr->mask)
1996                         break;
1997
1998                 switch (attr->reserved1) {
1999                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
2000                         if (vif->bss_conf.arp_addr_cnt != 1) {
2001                                 attr->mask = 0;
2002                                 continue;
2003                         }
2004
2005                         attr->val = vif->bss_conf.arp_addr_list[0];
2006                         break;
2007                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
2008                         attr->val = *(__be32 *)&vif->addr[2];
2009                         break;
2010                 default:
2011                         break;
2012                 }
2013                 attr->reserved1 = 0;
2014                 out_filter->num_attrs++;
2015         }
2016 }
2017
2018 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
2019                                           struct ieee80211_vif *vif)
2020 {
2021         struct iwl_bcast_iter_data *data = _data;
2022         struct iwl_mvm *mvm = data->mvm;
2023         struct iwl_bcast_filter_cmd *cmd = data->cmd;
2024         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2025         struct iwl_fw_bcast_mac *bcast_mac;
2026         int i;
2027
2028         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
2029                 return;
2030
2031         bcast_mac = &cmd->macs[mvmvif->id];
2032
2033         /*
2034          * enable filtering only for associated stations, but not for P2P
2035          * Clients
2036          */
2037         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
2038             !vif->bss_conf.assoc)
2039                 return;
2040
2041         bcast_mac->default_discard = 1;
2042
2043         /* copy all configured filters */
2044         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
2045                 /*
2046                  * Make sure we don't exceed our filters limit.
2047                  * if there is still a valid filter to be configured,
2048                  * be on the safe side and just allow bcast for this mac.
2049                  */
2050                 if (WARN_ON_ONCE(data->current_filter >=
2051                                  ARRAY_SIZE(cmd->filters))) {
2052                         bcast_mac->default_discard = 0;
2053                         bcast_mac->attached_filters = 0;
2054                         break;
2055                 }
2056
2057                 iwl_mvm_set_bcast_filter(vif,
2058                                          &mvm->bcast_filters[i],
2059                                          &cmd->filters[data->current_filter]);
2060
2061                 /* skip current filter if it contains no attributes */
2062                 if (!cmd->filters[data->current_filter].num_attrs)
2063                         continue;
2064
2065                 /* attach the filter to current mac */
2066                 bcast_mac->attached_filters |=
2067                                 cpu_to_le16(BIT(data->current_filter));
2068
2069                 data->current_filter++;
2070         }
2071 }
2072
2073 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
2074                                     struct iwl_bcast_filter_cmd *cmd)
2075 {
2076         struct iwl_bcast_iter_data iter_data = {
2077                 .mvm = mvm,
2078                 .cmd = cmd,
2079         };
2080
2081         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
2082                 return false;
2083
2084         memset(cmd, 0, sizeof(*cmd));
2085         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
2086         cmd->max_macs = ARRAY_SIZE(cmd->macs);
2087
2088 #ifdef CONFIG_IWLWIFI_DEBUGFS
2089         /* use debugfs filters/macs if override is configured */
2090         if (mvm->dbgfs_bcast_filtering.override) {
2091                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
2092                        sizeof(cmd->filters));
2093                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
2094                        sizeof(cmd->macs));
2095                 return true;
2096         }
2097 #endif
2098
2099         /* if no filters are configured, do nothing */
2100         if (!mvm->bcast_filters)
2101                 return false;
2102
2103         /* configure and attach these filters for each associated sta vif */
2104         ieee80211_iterate_active_interfaces(
2105                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2106                 iwl_mvm_bcast_filter_iterator, &iter_data);
2107
2108         return true;
2109 }
2110 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2111                                           struct ieee80211_vif *vif)
2112 {
2113         struct iwl_bcast_filter_cmd cmd;
2114
2115         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2116                 return 0;
2117
2118         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2119                 return 0;
2120
2121         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2122                                     sizeof(cmd), &cmd);
2123 }
2124 #else
2125 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2126                                                  struct ieee80211_vif *vif)
2127 {
2128         return 0;
2129 }
2130 #endif
2131
2132 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2133                                              struct ieee80211_vif *vif,
2134                                              struct ieee80211_bss_conf *bss_conf,
2135                                              u32 changes)
2136 {
2137         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2138         int ret;
2139
2140         /*
2141          * Re-calculate the tsf id, as the master-slave relations depend on the
2142          * beacon interval, which was not known when the station interface was
2143          * added.
2144          */
2145         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2146                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2147
2148         /*
2149          * If we're not associated yet, take the (new) BSSID before associating
2150          * so the firmware knows. If we're already associated, then use the old
2151          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2152          * branch for disassociation below.
2153          */
2154         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2155                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2156
2157         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2158         if (ret)
2159                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2160
2161         /* after sending it once, adopt mac80211 data */
2162         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2163         mvmvif->associated = bss_conf->assoc;
2164
2165         if (changes & BSS_CHANGED_ASSOC) {
2166                 if (bss_conf->assoc) {
2167                         /* clear statistics to get clean beacon counter */
2168                         iwl_mvm_request_statistics(mvm, true);
2169                         memset(&mvmvif->beacon_stats, 0,
2170                                sizeof(mvmvif->beacon_stats));
2171
2172                         /* add quota for this interface */
2173                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2174                         if (ret) {
2175                                 IWL_ERR(mvm, "failed to update quotas\n");
2176                                 return;
2177                         }
2178
2179                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2180                                      &mvm->status)) {
2181                                 /*
2182                                  * If we're restarting then the firmware will
2183                                  * obviously have lost synchronisation with
2184                                  * the AP. It will attempt to synchronise by
2185                                  * itself, but we can make it more reliable by
2186                                  * scheduling a session protection time event.
2187                                  *
2188                                  * The firmware needs to receive a beacon to
2189                                  * catch up with synchronisation, use 110% of
2190                                  * the beacon interval.
2191                                  *
2192                                  * Set a large maximum delay to allow for more
2193                                  * than a single interface.
2194                                  */
2195                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2196                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2197                                                         5 * dur, false);
2198                         }
2199
2200                         iwl_mvm_sf_update(mvm, vif, false);
2201                         iwl_mvm_power_vif_assoc(mvm, vif);
2202                         if (vif->p2p) {
2203                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2204                                 iwl_mvm_update_smps(mvm, vif,
2205                                                     IWL_MVM_SMPS_REQ_PROT,
2206                                                     IEEE80211_SMPS_DYNAMIC);
2207                         }
2208                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2209                         /*
2210                          * If update fails - SF might be running in associated
2211                          * mode while disassociated - which is forbidden.
2212                          */
2213                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2214                                   "Failed to update SF upon disassociation\n");
2215
2216                         /* remove AP station now that the MAC is unassoc */
2217                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2218                         if (ret)
2219                                 IWL_ERR(mvm, "failed to remove AP station\n");
2220
2221                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2222                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2223                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2224                         /* remove quota for this interface */
2225                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2226                         if (ret)
2227                                 IWL_ERR(mvm, "failed to update quotas\n");
2228
2229                         if (vif->p2p)
2230                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2231
2232                         /* this will take the cleared BSSID from bss_conf */
2233                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2234                         if (ret)
2235                                 IWL_ERR(mvm,
2236                                         "failed to update MAC %pM (clear after unassoc)\n",
2237                                         vif->addr);
2238                 }
2239
2240                 iwl_mvm_recalc_multicast(mvm);
2241                 iwl_mvm_configure_bcast_filter(mvm, vif);
2242
2243                 /* reset rssi values */
2244                 mvmvif->bf_data.ave_beacon_signal = 0;
2245
2246                 iwl_mvm_bt_coex_vif_change(mvm);
2247                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2248                                     IEEE80211_SMPS_AUTOMATIC);
2249         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2250                 /*
2251                  * We received a beacon _after_ association so
2252                  * remove the session protection.
2253                  */
2254                 iwl_mvm_remove_time_event(mvm, mvmvif,
2255                                           &mvmvif->time_event_data);
2256         }
2257
2258         if (changes & BSS_CHANGED_BEACON_INFO) {
2259                 iwl_mvm_sf_update(mvm, vif, false);
2260                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2261         }
2262
2263         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2264                 ret = iwl_mvm_power_update_mac(mvm);
2265                 if (ret)
2266                         IWL_ERR(mvm, "failed to update power mode\n");
2267         }
2268
2269         if (changes & BSS_CHANGED_TXPOWER) {
2270                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2271                                 bss_conf->txpower);
2272                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2273         }
2274
2275         if (changes & BSS_CHANGED_CQM) {
2276                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2277                 /* reset cqm events tracking */
2278                 mvmvif->bf_data.last_cqm_event = 0;
2279                 if (mvmvif->bf_data.bf_enabled) {
2280                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2281                         if (ret)
2282                                 IWL_ERR(mvm,
2283                                         "failed to update CQM thresholds\n");
2284                 }
2285         }
2286
2287         if (changes & BSS_CHANGED_ARP_FILTER) {
2288                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2289                 iwl_mvm_configure_bcast_filter(mvm, vif);
2290         }
2291 }
2292
2293 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2294                                  struct ieee80211_vif *vif)
2295 {
2296         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2297         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2298         int ret;
2299
2300         /*
2301          * iwl_mvm_mac_ctxt_add() might read directly from the device
2302          * (the system time), so make sure it is available.
2303          */
2304         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2305         if (ret)
2306                 return ret;
2307
2308         mutex_lock(&mvm->mutex);
2309
2310         /* Send the beacon template */
2311         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2312         if (ret)
2313                 goto out_unlock;
2314
2315         /*
2316          * Re-calculate the tsf id, as the master-slave relations depend on the
2317          * beacon interval, which was not known when the AP interface was added.
2318          */
2319         if (vif->type == NL80211_IFTYPE_AP)
2320                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2321
2322         /* Add the mac context */
2323         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2324         if (ret)
2325                 goto out_unlock;
2326
2327         /* Perform the binding */
2328         ret = iwl_mvm_binding_add_vif(mvm, vif);
2329         if (ret)
2330                 goto out_remove;
2331
2332         /* Send the bcast station. At this stage the TBTT and DTIM time events
2333          * are added and applied to the scheduler */
2334         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2335         if (ret)
2336                 goto out_unbind;
2337
2338         /* must be set before quota calculations */
2339         mvmvif->ap_ibss_active = true;
2340
2341         /* power updated needs to be done before quotas */
2342         iwl_mvm_power_update_mac(mvm);
2343
2344         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2345         if (ret)
2346                 goto out_quota_failed;
2347
2348         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2349         if (vif->p2p && mvm->p2p_device_vif)
2350                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2351
2352         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2353
2354         iwl_mvm_bt_coex_vif_change(mvm);
2355
2356         /* we don't support TDLS during DCM */
2357         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2358                 iwl_mvm_teardown_tdls_peers(mvm);
2359
2360         goto out_unlock;
2361
2362 out_quota_failed:
2363         iwl_mvm_power_update_mac(mvm);
2364         mvmvif->ap_ibss_active = false;
2365         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2366 out_unbind:
2367         iwl_mvm_binding_remove_vif(mvm, vif);
2368 out_remove:
2369         iwl_mvm_mac_ctxt_remove(mvm, vif);
2370 out_unlock:
2371         mutex_unlock(&mvm->mutex);
2372         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2373         return ret;
2374 }
2375
2376 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2377                                  struct ieee80211_vif *vif)
2378 {
2379         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2380         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2381
2382         iwl_mvm_prepare_mac_removal(mvm, vif);
2383
2384         mutex_lock(&mvm->mutex);
2385
2386         /* Handle AP stop while in CSA */
2387         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2388                 iwl_mvm_remove_time_event(mvm, mvmvif,
2389                                           &mvmvif->time_event_data);
2390                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2391                 mvmvif->csa_countdown = false;
2392         }
2393
2394         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2395                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2396                 mvm->csa_tx_block_bcn_timeout = 0;
2397         }
2398
2399         mvmvif->ap_ibss_active = false;
2400         mvm->ap_last_beacon_gp2 = 0;
2401
2402         iwl_mvm_bt_coex_vif_change(mvm);
2403
2404         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2405
2406         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2407         if (vif->p2p && mvm->p2p_device_vif)
2408                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2409
2410         iwl_mvm_update_quotas(mvm, false, NULL);
2411         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2412         iwl_mvm_binding_remove_vif(mvm, vif);
2413
2414         iwl_mvm_power_update_mac(mvm);
2415
2416         iwl_mvm_mac_ctxt_remove(mvm, vif);
2417
2418         mutex_unlock(&mvm->mutex);
2419 }
2420
2421 static void
2422 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2423                                  struct ieee80211_vif *vif,
2424                                  struct ieee80211_bss_conf *bss_conf,
2425                                  u32 changes)
2426 {
2427         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2428
2429         /* Changes will be applied when the AP/IBSS is started */
2430         if (!mvmvif->ap_ibss_active)
2431                 return;
2432
2433         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2434                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2435             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2436                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2437
2438         /* Need to send a new beacon template to the FW */
2439         if (changes & BSS_CHANGED_BEACON &&
2440             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2441                 IWL_WARN(mvm, "Failed updating beacon data\n");
2442
2443         if (changes & BSS_CHANGED_TXPOWER) {
2444                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2445                                 bss_conf->txpower);
2446                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2447         }
2448
2449 }
2450
2451 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2452                                      struct ieee80211_vif *vif,
2453                                      struct ieee80211_bss_conf *bss_conf,
2454                                      u32 changes)
2455 {
2456         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2457
2458         /*
2459          * iwl_mvm_bss_info_changed_station() might call
2460          * iwl_mvm_protect_session(), which reads directly from
2461          * the device (the system time), so make sure it is available.
2462          */
2463         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2464                 return;
2465
2466         mutex_lock(&mvm->mutex);
2467
2468         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2469                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2470
2471         switch (vif->type) {
2472         case NL80211_IFTYPE_STATION:
2473                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2474                 break;
2475         case NL80211_IFTYPE_AP:
2476         case NL80211_IFTYPE_ADHOC:
2477                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2478                 break;
2479         default:
2480                 /* shouldn't happen */
2481                 WARN_ON_ONCE(1);
2482         }
2483
2484         mutex_unlock(&mvm->mutex);
2485         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2486 }
2487
2488 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2489                                struct ieee80211_vif *vif,
2490                                struct ieee80211_scan_request *hw_req)
2491 {
2492         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2493         int ret;
2494
2495         if (hw_req->req.n_channels == 0 ||
2496             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2497                 return -EINVAL;
2498
2499         mutex_lock(&mvm->mutex);
2500         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2501         mutex_unlock(&mvm->mutex);
2502
2503         return ret;
2504 }
2505
2506 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2507                                        struct ieee80211_vif *vif)
2508 {
2509         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2510
2511         mutex_lock(&mvm->mutex);
2512
2513         /* Due to a race condition, it's possible that mac80211 asks
2514          * us to stop a hw_scan when it's already stopped.  This can
2515          * happen, for instance, if we stopped the scan ourselves,
2516          * called ieee80211_scan_completed() and the userspace called
2517          * cancel scan scan before ieee80211_scan_work() could run.
2518          * To handle that, simply return if the scan is not running.
2519         */
2520         if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2521                 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2522
2523         mutex_unlock(&mvm->mutex);
2524 }
2525
2526 static void
2527 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2528                                   struct ieee80211_sta *sta, u16 tids,
2529                                   int num_frames,
2530                                   enum ieee80211_frame_release_type reason,
2531                                   bool more_data)
2532 {
2533         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2534
2535         /* Called when we need to transmit (a) frame(s) from mac80211 */
2536
2537         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2538                                           tids, more_data, false);
2539 }
2540
2541 static void
2542 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2543                                     struct ieee80211_sta *sta, u16 tids,
2544                                     int num_frames,
2545                                     enum ieee80211_frame_release_type reason,
2546                                     bool more_data)
2547 {
2548         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2549
2550         /* Called when we need to transmit (a) frame(s) from agg queue */
2551
2552         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2553                                           tids, more_data, true);
2554 }
2555
2556 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2557                                    struct ieee80211_vif *vif,
2558                                    enum sta_notify_cmd cmd,
2559                                    struct ieee80211_sta *sta)
2560 {
2561         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2562         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2563         unsigned long txqs = 0, tids = 0;
2564         int tid;
2565
2566         spin_lock_bh(&mvmsta->lock);
2567         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2568                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2569
2570                 if (tid_data->state != IWL_AGG_ON &&
2571                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2572                         continue;
2573
2574                 __set_bit(tid_data->txq_id, &txqs);
2575
2576                 if (iwl_mvm_tid_queued(tid_data) == 0)
2577                         continue;
2578
2579                 __set_bit(tid, &tids);
2580         }
2581
2582         switch (cmd) {
2583         case STA_NOTIFY_SLEEP:
2584                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2585                         ieee80211_sta_block_awake(hw, sta, true);
2586
2587                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2588                         ieee80211_sta_set_buffered(sta, tid, true);
2589
2590                 if (txqs)
2591                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2592                 /*
2593                  * The fw updates the STA to be asleep. Tx packets on the Tx
2594                  * queues to this station will not be transmitted. The fw will
2595                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2596                  */
2597                 break;
2598         case STA_NOTIFY_AWAKE:
2599                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2600                         break;
2601
2602                 if (txqs)
2603                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2604                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2605                 break;
2606         default:
2607                 break;
2608         }
2609         spin_unlock_bh(&mvmsta->lock);
2610 }
2611
2612 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2613                                        struct ieee80211_vif *vif,
2614                                        struct ieee80211_sta *sta)
2615 {
2616         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2617         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2618
2619         /*
2620          * This is called before mac80211 does RCU synchronisation,
2621          * so here we already invalidate our internal RCU-protected
2622          * station pointer. The rest of the code will thus no longer
2623          * be able to find the station this way, and we don't rely
2624          * on further RCU synchronisation after the sta_state()
2625          * callback deleted the station.
2626          */
2627         mutex_lock(&mvm->mutex);
2628         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2629                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2630                                    ERR_PTR(-ENOENT));
2631         mutex_unlock(&mvm->mutex);
2632 }
2633
2634 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2635                                 const u8 *bssid)
2636 {
2637         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2638                 return;
2639
2640         if (iwlwifi_mod_params.uapsd_disable) {
2641                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2642                 return;
2643         }
2644
2645         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2646 }
2647
2648 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2649                                  struct ieee80211_vif *vif,
2650                                  struct ieee80211_sta *sta,
2651                                  enum ieee80211_sta_state old_state,
2652                                  enum ieee80211_sta_state new_state)
2653 {
2654         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2655         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2656         int ret;
2657
2658         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2659                            sta->addr, old_state, new_state);
2660
2661         /* this would be a mac80211 bug ... but don't crash */
2662         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2663                 return -EINVAL;
2664
2665         /* if a STA is being removed, reuse its ID */
2666         flush_work(&mvm->sta_drained_wk);
2667
2668         mutex_lock(&mvm->mutex);
2669         if (old_state == IEEE80211_STA_NOTEXIST &&
2670             new_state == IEEE80211_STA_NONE) {
2671                 /*
2672                  * Firmware bug - it'll crash if the beacon interval is less
2673                  * than 16. We can't avoid connecting at all, so refuse the
2674                  * station state change, this will cause mac80211 to abandon
2675                  * attempts to connect to this AP, and eventually wpa_s will
2676                  * blacklist the AP...
2677                  */
2678                 if (vif->type == NL80211_IFTYPE_STATION &&
2679                     vif->bss_conf.beacon_int < 16) {
2680                         IWL_ERR(mvm,
2681                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2682                                 sta->addr, vif->bss_conf.beacon_int);
2683                         ret = -EINVAL;
2684                         goto out_unlock;
2685                 }
2686
2687                 if (sta->tdls &&
2688                     (vif->p2p ||
2689                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2690                                                 IWL_MVM_TDLS_STA_COUNT ||
2691                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2692                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2693                         ret = -EBUSY;
2694                         goto out_unlock;
2695                 }
2696
2697                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2698                 if (sta->tdls && ret == 0)
2699                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2700         } else if (old_state == IEEE80211_STA_NONE &&
2701                    new_state == IEEE80211_STA_AUTH) {
2702                 /*
2703                  * EBS may be disabled due to previous failures reported by FW.
2704                  * Reset EBS status here assuming environment has been changed.
2705                  */
2706                 mvm->last_ebs_successful = true;
2707                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2708                 ret = 0;
2709         } else if (old_state == IEEE80211_STA_AUTH &&
2710                    new_state == IEEE80211_STA_ASSOC) {
2711                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2712                 if (ret == 0)
2713                         iwl_mvm_rs_rate_init(mvm, sta,
2714                                              mvmvif->phy_ctxt->channel->band,
2715                                              true);
2716         } else if (old_state == IEEE80211_STA_ASSOC &&
2717                    new_state == IEEE80211_STA_AUTHORIZED) {
2718
2719                 /* we don't support TDLS during DCM */
2720                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2721                         iwl_mvm_teardown_tdls_peers(mvm);
2722
2723                 /* enable beacon filtering */
2724                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2725                 ret = 0;
2726         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2727                    new_state == IEEE80211_STA_ASSOC) {
2728                 /* disable beacon filtering */
2729                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2730                 ret = 0;
2731         } else if (old_state == IEEE80211_STA_ASSOC &&
2732                    new_state == IEEE80211_STA_AUTH) {
2733                 ret = 0;
2734         } else if (old_state == IEEE80211_STA_AUTH &&
2735                    new_state == IEEE80211_STA_NONE) {
2736                 ret = 0;
2737         } else if (old_state == IEEE80211_STA_NONE &&
2738                    new_state == IEEE80211_STA_NOTEXIST) {
2739                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2740                 if (sta->tdls)
2741                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2742         } else {
2743                 ret = -EIO;
2744         }
2745  out_unlock:
2746         mutex_unlock(&mvm->mutex);
2747
2748         if (sta->tdls && ret == 0) {
2749                 if (old_state == IEEE80211_STA_NOTEXIST &&
2750                     new_state == IEEE80211_STA_NONE)
2751                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2752                 else if (old_state == IEEE80211_STA_NONE &&
2753                          new_state == IEEE80211_STA_NOTEXIST)
2754                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2755         }
2756
2757         return ret;
2758 }
2759
2760 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2761 {
2762         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2763
2764         mvm->rts_threshold = value;
2765
2766         return 0;
2767 }
2768
2769 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2770                                   struct ieee80211_vif *vif,
2771                                   struct ieee80211_sta *sta, u32 changed)
2772 {
2773         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2774
2775         if (vif->type == NL80211_IFTYPE_STATION &&
2776             changed & IEEE80211_RC_NSS_CHANGED)
2777                 iwl_mvm_sf_update(mvm, vif, false);
2778 }
2779
2780 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2781                                struct ieee80211_vif *vif, u16 ac,
2782                                const struct ieee80211_tx_queue_params *params)
2783 {
2784         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2785         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2786
2787         mvmvif->queue_params[ac] = *params;
2788
2789         /*
2790          * No need to update right away, we'll get BSS_CHANGED_QOS
2791          * The exception is P2P_DEVICE interface which needs immediate update.
2792          */
2793         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2794                 int ret;
2795
2796                 mutex_lock(&mvm->mutex);
2797                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2798                 mutex_unlock(&mvm->mutex);
2799                 return ret;
2800         }
2801         return 0;
2802 }
2803
2804 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2805                                       struct ieee80211_vif *vif)
2806 {
2807         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2808         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2809                            200 + vif->bss_conf.beacon_int);
2810         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2811                                100 + vif->bss_conf.beacon_int);
2812
2813         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2814                 return;
2815
2816         /*
2817          * iwl_mvm_protect_session() reads directly from the device
2818          * (the system time), so make sure it is available.
2819          */
2820         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2821                 return;
2822
2823         mutex_lock(&mvm->mutex);
2824         /* Try really hard to protect the session and hear a beacon */
2825         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2826         mutex_unlock(&mvm->mutex);
2827
2828         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2829 }
2830
2831 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2832                                         struct ieee80211_vif *vif,
2833                                         struct cfg80211_sched_scan_request *req,
2834                                         struct ieee80211_scan_ies *ies)
2835 {
2836         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2837
2838         int ret;
2839
2840         mutex_lock(&mvm->mutex);
2841
2842         if (!vif->bss_conf.idle) {
2843                 ret = -EBUSY;
2844                 goto out;
2845         }
2846
2847         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2848
2849 out:
2850         mutex_unlock(&mvm->mutex);
2851         return ret;
2852 }
2853
2854 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2855                                        struct ieee80211_vif *vif)
2856 {
2857         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2858         int ret;
2859
2860         mutex_lock(&mvm->mutex);
2861
2862         /* Due to a race condition, it's possible that mac80211 asks
2863          * us to stop a sched_scan when it's already stopped.  This
2864          * can happen, for instance, if we stopped the scan ourselves,
2865          * called ieee80211_sched_scan_stopped() and the userspace called
2866          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2867          * could run.  To handle this, simply return if the scan is
2868          * not running.
2869         */
2870         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2871                 mutex_unlock(&mvm->mutex);
2872                 return 0;
2873         }
2874
2875         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2876         mutex_unlock(&mvm->mutex);
2877         iwl_mvm_wait_for_async_handlers(mvm);
2878
2879         return ret;
2880 }
2881
2882 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2883                                enum set_key_cmd cmd,
2884                                struct ieee80211_vif *vif,
2885                                struct ieee80211_sta *sta,
2886                                struct ieee80211_key_conf *key)
2887 {
2888         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2889         int ret;
2890
2891         if (iwlwifi_mod_params.sw_crypto) {
2892                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2893                 return -EOPNOTSUPP;
2894         }
2895
2896         switch (key->cipher) {
2897         case WLAN_CIPHER_SUITE_TKIP:
2898                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2899                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2900                 break;
2901         case WLAN_CIPHER_SUITE_CCMP:
2902                 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2903                 break;
2904         case WLAN_CIPHER_SUITE_AES_CMAC:
2905                 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2906                 break;
2907         case WLAN_CIPHER_SUITE_WEP40:
2908         case WLAN_CIPHER_SUITE_WEP104:
2909                 /* For non-client mode, only use WEP keys for TX as we probably
2910                  * don't have a station yet anyway and would then have to keep
2911                  * track of the keys, linking them to each of the clients/peers
2912                  * as they appear. For now, don't do that, for performance WEP
2913                  * offload doesn't really matter much, but we need it for some
2914                  * other offload features in client mode.
2915                  */
2916                 if (vif->type != NL80211_IFTYPE_STATION)
2917                         return 0;
2918                 break;
2919         default:
2920                 /* currently FW supports only one optional cipher scheme */
2921                 if (hw->n_cipher_schemes &&
2922                     hw->cipher_schemes->cipher == key->cipher)
2923                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2924                 else
2925                         return -EOPNOTSUPP;
2926         }
2927
2928         mutex_lock(&mvm->mutex);
2929
2930         switch (cmd) {
2931         case SET_KEY:
2932                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2933                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2934                         /*
2935                          * GTK on AP interface is a TX-only key, return 0;
2936                          * on IBSS they're per-station and because we're lazy
2937                          * we don't support them for RX, so do the same.
2938                          */
2939                         ret = 0;
2940                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2941                         break;
2942                 }
2943
2944                 /* During FW restart, in order to restore the state as it was,
2945                  * don't try to reprogram keys we previously failed for.
2946                  */
2947                 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2948                     key->hw_key_idx == STA_KEY_IDX_INVALID) {
2949                         IWL_DEBUG_MAC80211(mvm,
2950                                            "skip invalid idx key programming during restart\n");
2951                         ret = 0;
2952                         break;
2953                 }
2954
2955                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2956                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key,
2957                                           test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2958                                                    &mvm->status));
2959                 if (ret) {
2960                         IWL_WARN(mvm, "set key failed\n");
2961                         /*
2962                          * can't add key for RX, but we don't need it
2963                          * in the device for TX so still return 0
2964                          */
2965                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2966                         ret = 0;
2967                 }
2968
2969                 break;
2970         case DISABLE_KEY:
2971                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2972                         ret = 0;
2973                         break;
2974                 }
2975
2976                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2977                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2978                 break;
2979         default:
2980                 ret = -EINVAL;
2981         }
2982
2983         mutex_unlock(&mvm->mutex);
2984         return ret;
2985 }
2986
2987 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2988                                         struct ieee80211_vif *vif,
2989                                         struct ieee80211_key_conf *keyconf,
2990                                         struct ieee80211_sta *sta,
2991                                         u32 iv32, u16 *phase1key)
2992 {
2993         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2994
2995         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2996                 return;
2997
2998         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2999 }
3000
3001
3002 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
3003                                struct iwl_rx_packet *pkt, void *data)
3004 {
3005         struct iwl_mvm *mvm =
3006                 container_of(notif_wait, struct iwl_mvm, notif_wait);
3007         struct iwl_hs20_roc_res *resp;
3008         int resp_len = iwl_rx_packet_payload_len(pkt);
3009         struct iwl_mvm_time_event_data *te_data = data;
3010
3011         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
3012                 return true;
3013
3014         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
3015                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
3016                 return true;
3017         }
3018
3019         resp = (void *)pkt->data;
3020
3021         IWL_DEBUG_TE(mvm,
3022                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
3023                      resp->status, resp->event_unique_id);
3024
3025         te_data->uid = le32_to_cpu(resp->event_unique_id);
3026         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
3027                      te_data->uid);
3028
3029         spin_lock_bh(&mvm->time_event_lock);
3030         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
3031         spin_unlock_bh(&mvm->time_event_lock);
3032
3033         return true;
3034 }
3035
3036 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 200
3037 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
3038                                     struct ieee80211_channel *channel,
3039                                     struct ieee80211_vif *vif,
3040                                     int duration)
3041 {
3042         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
3043         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3044         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
3045         static const u16 time_event_response[] = { HOT_SPOT_CMD };
3046         struct iwl_notification_wait wait_time_event;
3047         struct iwl_hs20_roc_req aux_roc_req = {
3048                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
3049                 .id_and_color =
3050                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
3051                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
3052                 /* Set the channel info data */
3053                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
3054                         PHY_BAND_24 : PHY_BAND_5,
3055                 .channel_info.channel = channel->hw_value,
3056                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
3057                 /* Set the time and duration */
3058                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
3059                 .apply_time_max_delay =
3060                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
3061                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
3062          };
3063
3064         /* Set the node address */
3065         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
3066
3067         lockdep_assert_held(&mvm->mutex);
3068
3069         spin_lock_bh(&mvm->time_event_lock);
3070
3071         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
3072                 spin_unlock_bh(&mvm->time_event_lock);
3073                 return -EIO;
3074         }
3075
3076         te_data->vif = vif;
3077         te_data->duration = duration;
3078         te_data->id = HOT_SPOT_CMD;
3079
3080         spin_unlock_bh(&mvm->time_event_lock);
3081
3082         /*
3083          * Use a notification wait, which really just processes the
3084          * command response and doesn't wait for anything, in order
3085          * to be able to process the response and get the UID inside
3086          * the RX path. Using CMD_WANT_SKB doesn't work because it
3087          * stores the buffer and then wakes up this thread, by which
3088          * time another notification (that the time event started)
3089          * might already be processed unsuccessfully.
3090          */
3091         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
3092                                    time_event_response,
3093                                    ARRAY_SIZE(time_event_response),
3094                                    iwl_mvm_rx_aux_roc, te_data);
3095
3096         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
3097                                    &aux_roc_req);
3098
3099         if (res) {
3100                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
3101                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
3102                 goto out_clear_te;
3103         }
3104
3105         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
3106         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
3107         /* should never fail */
3108         WARN_ON_ONCE(res);
3109
3110         if (res) {
3111  out_clear_te:
3112                 spin_lock_bh(&mvm->time_event_lock);
3113                 iwl_mvm_te_clear_data(mvm, te_data);
3114                 spin_unlock_bh(&mvm->time_event_lock);
3115         }
3116
3117         return res;
3118 }
3119
3120 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3121                        struct ieee80211_vif *vif,
3122                        struct ieee80211_channel *channel,
3123                        int duration,
3124                        enum ieee80211_roc_type type)
3125 {
3126         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3127         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3128         struct cfg80211_chan_def chandef;
3129         struct iwl_mvm_phy_ctxt *phy_ctxt;
3130         int ret, i;
3131
3132         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3133                            duration, type);
3134
3135         flush_work(&mvm->roc_done_wk);
3136
3137         mutex_lock(&mvm->mutex);
3138
3139         switch (vif->type) {
3140         case NL80211_IFTYPE_STATION:
3141                 if (fw_has_capa(&mvm->fw->ucode_capa,
3142                                 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
3143                         /* Use aux roc framework (HS20) */
3144                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3145                                                        vif, duration);
3146                         goto out_unlock;
3147                 }
3148                 IWL_ERR(mvm, "hotspot not supported\n");
3149                 ret = -EINVAL;
3150                 goto out_unlock;
3151         case NL80211_IFTYPE_P2P_DEVICE:
3152                 /* handle below */
3153                 break;
3154         default:
3155                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3156                 ret = -EINVAL;
3157                 goto out_unlock;
3158         }
3159
3160         for (i = 0; i < NUM_PHY_CTX; i++) {
3161                 phy_ctxt = &mvm->phy_ctxts[i];
3162                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3163                         continue;
3164
3165                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3166                         /*
3167                          * Unbind the P2P_DEVICE from the current PHY context,
3168                          * and if the PHY context is not used remove it.
3169                          */
3170                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3171                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3172                                 goto out_unlock;
3173
3174                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3175
3176                         /* Bind the P2P_DEVICE to the current PHY Context */
3177                         mvmvif->phy_ctxt = phy_ctxt;
3178
3179                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3180                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3181                                 goto out_unlock;
3182
3183                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3184                         goto schedule_time_event;
3185                 }
3186         }
3187
3188         /* Need to update the PHY context only if the ROC channel changed */
3189         if (channel == mvmvif->phy_ctxt->channel)
3190                 goto schedule_time_event;
3191
3192         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3193
3194         /*
3195          * Change the PHY context configuration as it is currently referenced
3196          * only by the P2P Device MAC
3197          */
3198         if (mvmvif->phy_ctxt->ref == 1) {
3199                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3200                                                &chandef, 1, 1);
3201                 if (ret)
3202                         goto out_unlock;
3203         } else {
3204                 /*
3205                  * The PHY context is shared with other MACs. Need to remove the
3206                  * P2P Device from the binding, allocate an new PHY context and
3207                  * create a new binding
3208                  */
3209                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3210                 if (!phy_ctxt) {
3211                         ret = -ENOSPC;
3212                         goto out_unlock;
3213                 }
3214
3215                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3216                                                1, 1);
3217                 if (ret) {
3218                         IWL_ERR(mvm, "Failed to change PHY context\n");
3219                         goto out_unlock;
3220                 }
3221
3222                 /* Unbind the P2P_DEVICE from the current PHY context */
3223                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3224                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3225                         goto out_unlock;
3226
3227                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3228
3229                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3230                 mvmvif->phy_ctxt = phy_ctxt;
3231
3232                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3233                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3234                         goto out_unlock;
3235
3236                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3237         }
3238
3239 schedule_time_event:
3240         /* Schedule the time events */
3241         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3242
3243 out_unlock:
3244         mutex_unlock(&mvm->mutex);
3245         IWL_DEBUG_MAC80211(mvm, "leave\n");
3246         return ret;
3247 }
3248
3249 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3250 {
3251         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3252
3253         IWL_DEBUG_MAC80211(mvm, "enter\n");
3254
3255         mutex_lock(&mvm->mutex);
3256         iwl_mvm_stop_roc(mvm);
3257         mutex_unlock(&mvm->mutex);
3258
3259         IWL_DEBUG_MAC80211(mvm, "leave\n");
3260         return 0;
3261 }
3262
3263 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3264                                  struct ieee80211_chanctx_conf *ctx)
3265 {
3266         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3267         struct iwl_mvm_phy_ctxt *phy_ctxt;
3268         int ret;
3269
3270         lockdep_assert_held(&mvm->mutex);
3271
3272         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3273
3274         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3275         if (!phy_ctxt) {
3276                 ret = -ENOSPC;
3277                 goto out;
3278         }
3279
3280         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3281                                        ctx->rx_chains_static,
3282                                        ctx->rx_chains_dynamic);
3283         if (ret) {
3284                 IWL_ERR(mvm, "Failed to add PHY context\n");
3285                 goto out;
3286         }
3287
3288         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3289         *phy_ctxt_id = phy_ctxt->id;
3290 out:
3291         return ret;
3292 }
3293
3294 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3295                                struct ieee80211_chanctx_conf *ctx)
3296 {
3297         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3298         int ret;
3299
3300         mutex_lock(&mvm->mutex);
3301         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3302         mutex_unlock(&mvm->mutex);
3303
3304         return ret;
3305 }
3306
3307 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3308                                      struct ieee80211_chanctx_conf *ctx)
3309 {
3310         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3311         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3312
3313         lockdep_assert_held(&mvm->mutex);
3314
3315         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3316 }
3317
3318 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3319                                    struct ieee80211_chanctx_conf *ctx)
3320 {
3321         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3322
3323         mutex_lock(&mvm->mutex);
3324         __iwl_mvm_remove_chanctx(mvm, ctx);
3325         mutex_unlock(&mvm->mutex);
3326 }
3327
3328 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3329                                    struct ieee80211_chanctx_conf *ctx,
3330                                    u32 changed)
3331 {
3332         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3333         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3334         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3335
3336         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3337                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3338                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3339                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3340                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3341                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3342                       phy_ctxt->ref, changed))
3343                 return;
3344
3345         mutex_lock(&mvm->mutex);
3346         iwl_mvm_bt_coex_vif_change(mvm);
3347         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3348                                  ctx->rx_chains_static,
3349                                  ctx->rx_chains_dynamic);
3350         mutex_unlock(&mvm->mutex);
3351 }
3352
3353 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3354                                         struct ieee80211_vif *vif,
3355                                         struct ieee80211_chanctx_conf *ctx,
3356                                         bool switching_chanctx)
3357 {
3358         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3359         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3360         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3361         int ret;
3362
3363         lockdep_assert_held(&mvm->mutex);
3364
3365         mvmvif->phy_ctxt = phy_ctxt;
3366
3367         switch (vif->type) {
3368         case NL80211_IFTYPE_AP:
3369                 /* only needed if we're switching chanctx (i.e. during CSA) */
3370                 if (switching_chanctx) {
3371                         mvmvif->ap_ibss_active = true;
3372                         break;
3373                 }
3374         case NL80211_IFTYPE_ADHOC:
3375                 /*
3376                  * The AP binding flow is handled as part of the start_ap flow
3377                  * (in bss_info_changed), similarly for IBSS.
3378                  */
3379                 ret = 0;
3380                 goto out;
3381         case NL80211_IFTYPE_STATION:
3382                 break;
3383         case NL80211_IFTYPE_MONITOR:
3384                 /* always disable PS when a monitor interface is active */
3385                 mvmvif->ps_disabled = true;
3386                 break;
3387         default:
3388                 ret = -EINVAL;
3389                 goto out;
3390         }
3391
3392         ret = iwl_mvm_binding_add_vif(mvm, vif);
3393         if (ret)
3394                 goto out;
3395
3396         /*
3397          * Power state must be updated before quotas,
3398          * otherwise fw will complain.
3399          */
3400         iwl_mvm_power_update_mac(mvm);
3401
3402         /* Setting the quota at this stage is only required for monitor
3403          * interfaces. For the other types, the bss_info changed flow
3404          * will handle quota settings.
3405          */
3406         if (vif->type == NL80211_IFTYPE_MONITOR) {
3407                 mvmvif->monitor_active = true;
3408                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3409                 if (ret)
3410                         goto out_remove_binding;
3411         }
3412
3413         /* Handle binding during CSA */
3414         if (vif->type == NL80211_IFTYPE_AP) {
3415                 iwl_mvm_update_quotas(mvm, false, NULL);
3416                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3417         }
3418
3419         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3420                 u32 duration = 2 * vif->bss_conf.beacon_int;
3421
3422                 /* iwl_mvm_protect_session() reads directly from the
3423                  * device (the system time), so make sure it is
3424                  * available.
3425                  */
3426                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3427                 if (ret)
3428                         goto out_remove_binding;
3429
3430                 /* Protect the session to make sure we hear the first
3431                  * beacon on the new channel.
3432                  */
3433                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3434                                         vif->bss_conf.beacon_int / 2,
3435                                         true);
3436
3437                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3438
3439                 iwl_mvm_update_quotas(mvm, false, NULL);
3440         }
3441
3442         goto out;
3443
3444 out_remove_binding:
3445         iwl_mvm_binding_remove_vif(mvm, vif);
3446         iwl_mvm_power_update_mac(mvm);
3447 out:
3448         if (ret)
3449                 mvmvif->phy_ctxt = NULL;
3450         return ret;
3451 }
3452 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3453                                       struct ieee80211_vif *vif,
3454                                       struct ieee80211_chanctx_conf *ctx)
3455 {
3456         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3457         int ret;
3458
3459         mutex_lock(&mvm->mutex);
3460         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3461         mutex_unlock(&mvm->mutex);
3462
3463         return ret;
3464 }
3465
3466 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3467                                            struct ieee80211_vif *vif,
3468                                            struct ieee80211_chanctx_conf *ctx,
3469                                            bool switching_chanctx)
3470 {
3471         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3472         struct ieee80211_vif *disabled_vif = NULL;
3473
3474         lockdep_assert_held(&mvm->mutex);
3475
3476         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3477
3478         switch (vif->type) {
3479         case NL80211_IFTYPE_ADHOC:
3480                 goto out;
3481         case NL80211_IFTYPE_MONITOR:
3482                 mvmvif->monitor_active = false;
3483                 mvmvif->ps_disabled = false;
3484                 break;
3485         case NL80211_IFTYPE_AP:
3486                 /* This part is triggered only during CSA */
3487                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3488                         goto out;
3489
3490                 mvmvif->csa_countdown = false;
3491
3492                 /* Set CS bit on all the stations */
3493                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3494
3495                 /* Save blocked iface, the timeout is set on the next beacon */
3496                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3497
3498                 mvmvif->ap_ibss_active = false;
3499                 break;
3500         case NL80211_IFTYPE_STATION:
3501                 if (!switching_chanctx)
3502                         break;
3503
3504                 disabled_vif = vif;
3505
3506                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3507                 break;
3508         default:
3509                 break;
3510         }
3511
3512         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3513         iwl_mvm_binding_remove_vif(mvm, vif);
3514
3515 out:
3516         mvmvif->phy_ctxt = NULL;
3517         iwl_mvm_power_update_mac(mvm);
3518 }
3519
3520 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3521                                          struct ieee80211_vif *vif,
3522                                          struct ieee80211_chanctx_conf *ctx)
3523 {
3524         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3525
3526         mutex_lock(&mvm->mutex);
3527         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3528         mutex_unlock(&mvm->mutex);
3529 }
3530
3531 static int
3532 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3533                                 struct ieee80211_vif_chanctx_switch *vifs)
3534 {
3535         int ret;
3536
3537         mutex_lock(&mvm->mutex);
3538         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3539         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3540
3541         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3542         if (ret) {
3543                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3544                 goto out_reassign;
3545         }
3546
3547         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3548                                            true);
3549         if (ret) {
3550                 IWL_ERR(mvm,
3551                         "failed to assign new_ctx during channel switch\n");
3552                 goto out_remove;
3553         }
3554
3555         /* we don't support TDLS during DCM - can be caused by channel switch */
3556         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3557                 iwl_mvm_teardown_tdls_peers(mvm);
3558
3559         goto out;
3560
3561 out_remove:
3562         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3563
3564 out_reassign:
3565         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3566                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3567                 goto out_restart;
3568         }
3569
3570         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3571                                          true)) {
3572                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3573                 goto out_restart;
3574         }
3575
3576         goto out;
3577
3578 out_restart:
3579         /* things keep failing, better restart the hw */
3580         iwl_mvm_nic_restart(mvm, false);
3581
3582 out:
3583         mutex_unlock(&mvm->mutex);
3584
3585         return ret;
3586 }
3587
3588 static int
3589 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3590                                     struct ieee80211_vif_chanctx_switch *vifs)
3591 {
3592         int ret;
3593
3594         mutex_lock(&mvm->mutex);
3595         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3596
3597         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3598                                            true);
3599         if (ret) {
3600                 IWL_ERR(mvm,
3601                         "failed to assign new_ctx during channel switch\n");
3602                 goto out_reassign;
3603         }
3604
3605         goto out;
3606
3607 out_reassign:
3608         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3609                                          true)) {
3610                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3611                 goto out_restart;
3612         }
3613
3614         goto out;
3615
3616 out_restart:
3617         /* things keep failing, better restart the hw */
3618         iwl_mvm_nic_restart(mvm, false);
3619
3620 out:
3621         mutex_unlock(&mvm->mutex);
3622
3623         return ret;
3624 }
3625
3626 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3627                                       struct ieee80211_vif_chanctx_switch *vifs,
3628                                       int n_vifs,
3629                                       enum ieee80211_chanctx_switch_mode mode)
3630 {
3631         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3632         int ret;
3633
3634         /* we only support a single-vif right now */
3635         if (n_vifs > 1)
3636                 return -EOPNOTSUPP;
3637
3638         switch (mode) {
3639         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3640                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3641                 break;
3642         case CHANCTX_SWMODE_REASSIGN_VIF:
3643                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3644                 break;
3645         default:
3646                 ret = -EOPNOTSUPP;
3647                 break;
3648         }
3649
3650         return ret;
3651 }
3652
3653 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3654                            struct ieee80211_sta *sta,
3655                            bool set)
3656 {
3657         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3658         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3659
3660         if (!mvm_sta || !mvm_sta->vif) {
3661                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3662                 return -EINVAL;
3663         }
3664
3665         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3666 }
3667
3668 #ifdef CONFIG_NL80211_TESTMODE
3669 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3670         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3671         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3672         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3673 };
3674
3675 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3676                                       struct ieee80211_vif *vif,
3677                                       void *data, int len)
3678 {
3679         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3680         int err;
3681         u32 noa_duration;
3682
3683         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3684         if (err)
3685                 return err;
3686
3687         if (!tb[IWL_MVM_TM_ATTR_CMD])
3688                 return -EINVAL;
3689
3690         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3691         case IWL_MVM_TM_CMD_SET_NOA:
3692                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3693                     !vif->bss_conf.enable_beacon ||
3694                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3695                         return -EINVAL;
3696
3697                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3698                 if (noa_duration >= vif->bss_conf.beacon_int)
3699                         return -EINVAL;
3700
3701                 mvm->noa_duration = noa_duration;
3702                 mvm->noa_vif = vif;
3703
3704                 return iwl_mvm_update_quotas(mvm, false, NULL);
3705         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3706                 /* must be associated client vif - ignore authorized */
3707                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3708                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3709                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3710                         return -EINVAL;
3711
3712                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3713                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3714                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3715         }
3716
3717         return -EOPNOTSUPP;
3718 }
3719
3720 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3721                                     struct ieee80211_vif *vif,
3722                                     void *data, int len)
3723 {
3724         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3725         int err;
3726
3727         mutex_lock(&mvm->mutex);
3728         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3729         mutex_unlock(&mvm->mutex);
3730
3731         return err;
3732 }
3733 #endif
3734
3735 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3736                                    struct ieee80211_vif *vif,
3737                                    struct ieee80211_channel_switch *chsw)
3738 {
3739         /* By implementing this operation, we prevent mac80211 from
3740          * starting its own channel switch timer, so that we can call
3741          * ieee80211_chswitch_done() ourselves at the right time
3742          * (which is when the absence time event starts).
3743          */
3744
3745         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3746                            "dummy channel switch op\n");
3747 }
3748
3749 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3750                                       struct ieee80211_vif *vif,
3751                                       struct ieee80211_channel_switch *chsw)
3752 {
3753         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3754         struct ieee80211_vif *csa_vif;
3755         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3756         u32 apply_time;
3757         int ret;
3758
3759         mutex_lock(&mvm->mutex);
3760
3761         mvmvif->csa_failed = false;
3762
3763         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3764                            chsw->chandef.center_freq1);
3765
3766         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3767
3768         switch (vif->type) {
3769         case NL80211_IFTYPE_AP:
3770                 csa_vif =
3771                         rcu_dereference_protected(mvm->csa_vif,
3772                                                   lockdep_is_held(&mvm->mutex));
3773                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3774                               "Another CSA is already in progress")) {
3775                         ret = -EBUSY;
3776                         goto out_unlock;
3777                 }
3778
3779                 rcu_assign_pointer(mvm->csa_vif, vif);
3780
3781                 if (WARN_ONCE(mvmvif->csa_countdown,
3782                               "Previous CSA countdown didn't complete")) {
3783                         ret = -EBUSY;
3784                         goto out_unlock;
3785                 }
3786
3787                 break;
3788         case NL80211_IFTYPE_STATION:
3789                 /* Schedule the time event to a bit before beacon 1,
3790                  * to make sure we're in the new channel when the
3791                  * GO/AP arrives.
3792                  */
3793                 apply_time = chsw->device_timestamp +
3794                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3795                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3796
3797                 if (chsw->block_tx)
3798                         iwl_mvm_csa_client_absent(mvm, vif);
3799
3800                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3801                                             apply_time);
3802                 if (mvmvif->bf_data.bf_enabled) {
3803                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3804                         if (ret)
3805                                 goto out_unlock;
3806                 }
3807
3808                 break;
3809         default:
3810                 break;
3811         }
3812
3813         mvmvif->ps_disabled = true;
3814
3815         ret = iwl_mvm_power_update_ps(mvm);
3816         if (ret)
3817                 goto out_unlock;
3818
3819         /* we won't be on this channel any longer */
3820         iwl_mvm_teardown_tdls_peers(mvm);
3821
3822 out_unlock:
3823         mutex_unlock(&mvm->mutex);
3824
3825         return ret;
3826 }
3827
3828 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3829                                        struct ieee80211_vif *vif)
3830 {
3831         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3832         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3833         int ret;
3834
3835         mutex_lock(&mvm->mutex);
3836
3837         if (mvmvif->csa_failed) {
3838                 mvmvif->csa_failed = false;
3839                 ret = -EIO;
3840                 goto out_unlock;
3841         }
3842
3843         if (vif->type == NL80211_IFTYPE_STATION) {
3844                 struct iwl_mvm_sta *mvmsta;
3845
3846                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3847                                                           mvmvif->ap_sta_id);
3848
3849                 if (WARN_ON(!mvmsta)) {
3850                         ret = -EIO;
3851                         goto out_unlock;
3852                 }
3853
3854                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3855
3856                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3857
3858                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3859                 if (ret)
3860                         goto out_unlock;
3861
3862                 iwl_mvm_stop_session_protection(mvm, vif);
3863         }
3864
3865         mvmvif->ps_disabled = false;
3866
3867         ret = iwl_mvm_power_update_ps(mvm);
3868
3869 out_unlock:
3870         mutex_unlock(&mvm->mutex);
3871
3872         return ret;
3873 }
3874
3875 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3876                               struct ieee80211_vif *vif, u32 queues, bool drop)
3877 {
3878         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3879         struct iwl_mvm_vif *mvmvif;
3880         struct iwl_mvm_sta *mvmsta;
3881         struct ieee80211_sta *sta;
3882         int i;
3883         u32 msk = 0;
3884
3885         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3886                 return;
3887
3888         mutex_lock(&mvm->mutex);
3889         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3890
3891         /* flush the AP-station and all TDLS peers */
3892         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3893                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3894                                                 lockdep_is_held(&mvm->mutex));
3895                 if (IS_ERR_OR_NULL(sta))
3896                         continue;
3897
3898                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3899                 if (mvmsta->vif != vif)
3900                         continue;
3901
3902                 /* make sure only TDLS peers or the AP are flushed */
3903                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3904
3905                 msk |= mvmsta->tfd_queue_msk;
3906         }
3907
3908         if (drop) {
3909                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3910                         IWL_ERR(mvm, "flush request fail\n");
3911                 mutex_unlock(&mvm->mutex);
3912         } else {
3913                 mutex_unlock(&mvm->mutex);
3914
3915                 /* this can take a while, and we may need/want other operations
3916                  * to succeed while doing this, so do it without the mutex held
3917                  */
3918                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3919         }
3920 }
3921
3922 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3923                                   struct survey_info *survey)
3924 {
3925         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3926         int ret;
3927
3928         memset(survey, 0, sizeof(*survey));
3929
3930         /* only support global statistics right now */
3931         if (idx != 0)
3932                 return -ENOENT;
3933
3934         if (fw_has_capa(&mvm->fw->ucode_capa,
3935                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3936                 return -ENOENT;
3937
3938         mutex_lock(&mvm->mutex);
3939
3940         if (mvm->ucode_loaded) {
3941                 ret = iwl_mvm_request_statistics(mvm, false);
3942                 if (ret)
3943                         goto out;
3944         }
3945
3946         survey->filled = SURVEY_INFO_TIME |
3947                          SURVEY_INFO_TIME_RX |
3948                          SURVEY_INFO_TIME_TX |
3949                          SURVEY_INFO_TIME_SCAN;
3950         survey->time = mvm->accu_radio_stats.on_time_rf +
3951                        mvm->radio_stats.on_time_rf;
3952         do_div(survey->time, USEC_PER_MSEC);
3953
3954         survey->time_rx = mvm->accu_radio_stats.rx_time +
3955                           mvm->radio_stats.rx_time;
3956         do_div(survey->time_rx, USEC_PER_MSEC);
3957
3958         survey->time_tx = mvm->accu_radio_stats.tx_time +
3959                           mvm->radio_stats.tx_time;
3960         do_div(survey->time_tx, USEC_PER_MSEC);
3961
3962         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3963                             mvm->radio_stats.on_time_scan;
3964         do_div(survey->time_scan, USEC_PER_MSEC);
3965
3966         ret = 0;
3967  out:
3968         mutex_unlock(&mvm->mutex);
3969         return ret;
3970 }
3971
3972 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3973                                        struct ieee80211_vif *vif,
3974                                        struct ieee80211_sta *sta,
3975                                        struct station_info *sinfo)
3976 {
3977         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3978         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3979         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3980
3981         if (fw_has_capa(&mvm->fw->ucode_capa,
3982                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3983                 return;
3984
3985         /* if beacon filtering isn't on mac80211 does it anyway */
3986         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3987                 return;
3988
3989         if (!vif->bss_conf.assoc)
3990                 return;
3991
3992         mutex_lock(&mvm->mutex);
3993
3994         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3995                 goto unlock;
3996
3997         if (iwl_mvm_request_statistics(mvm, false))
3998                 goto unlock;
3999
4000         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
4001                            mvmvif->beacon_stats.accu_num_beacons;
4002         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
4003         if (mvmvif->beacon_stats.avg_signal) {
4004                 /* firmware only reports a value after RXing a few beacons */
4005                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
4006                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
4007         }
4008  unlock:
4009         mutex_unlock(&mvm->mutex);
4010 }
4011
4012 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
4013                                         struct ieee80211_vif *vif,
4014                                         const struct ieee80211_event *event)
4015 {
4016 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
4017         do {                                                    \
4018                 if ((_cnt) && --(_cnt))                         \
4019                         break;                                  \
4020                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
4021         } while (0)
4022
4023         struct iwl_fw_dbg_trigger_tlv *trig;
4024         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
4025
4026         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
4027                 return;
4028
4029         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
4030         trig_mlme = (void *)trig->data;
4031         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4032                 return;
4033
4034         if (event->u.mlme.data == ASSOC_EVENT) {
4035                 if (event->u.mlme.status == MLME_DENIED)
4036                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4037                                            trig_mlme->stop_assoc_denied,
4038                                            "DENIED ASSOC: reason %d",
4039                                             event->u.mlme.reason);
4040                 else if (event->u.mlme.status == MLME_TIMEOUT)
4041                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4042                                            trig_mlme->stop_assoc_timeout,
4043                                            "ASSOC TIMEOUT");
4044         } else if (event->u.mlme.data == AUTH_EVENT) {
4045                 if (event->u.mlme.status == MLME_DENIED)
4046                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4047                                            trig_mlme->stop_auth_denied,
4048                                            "DENIED AUTH: reason %d",
4049                                            event->u.mlme.reason);
4050                 else if (event->u.mlme.status == MLME_TIMEOUT)
4051                         CHECK_MLME_TRIGGER(mvm, trig, buf,
4052                                            trig_mlme->stop_auth_timeout,
4053                                            "AUTH TIMEOUT");
4054         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
4055                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4056                                    trig_mlme->stop_rx_deauth,
4057                                    "DEAUTH RX %d", event->u.mlme.reason);
4058         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
4059                 CHECK_MLME_TRIGGER(mvm, trig, buf,
4060                                    trig_mlme->stop_tx_deauth,
4061                                    "DEAUTH TX %d", event->u.mlme.reason);
4062         }
4063 #undef CHECK_MLME_TRIGGER
4064 }
4065
4066 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
4067                                           struct ieee80211_vif *vif,
4068                                           const struct ieee80211_event *event)
4069 {
4070         struct iwl_fw_dbg_trigger_tlv *trig;
4071         struct iwl_fw_dbg_trigger_ba *ba_trig;
4072
4073         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4074                 return;
4075
4076         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4077         ba_trig = (void *)trig->data;
4078         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4079                 return;
4080
4081         if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
4082                 return;
4083
4084         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4085                                     "BAR received from %pM, tid %d, ssn %d",
4086                                     event->u.ba.sta->addr, event->u.ba.tid,
4087                                     event->u.ba.ssn);
4088 }
4089
4090 static void
4091 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
4092                                      struct ieee80211_vif *vif,
4093                                      const struct ieee80211_event *event)
4094 {
4095         struct iwl_fw_dbg_trigger_tlv *trig;
4096         struct iwl_fw_dbg_trigger_ba *ba_trig;
4097
4098         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
4099                 return;
4100
4101         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
4102         ba_trig = (void *)trig->data;
4103         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
4104                 return;
4105
4106         if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
4107                 return;
4108
4109         iwl_mvm_fw_dbg_collect_trig(mvm, trig,
4110                                     "Frame from %pM timed out, tid %d",
4111                                     event->u.ba.sta->addr, event->u.ba.tid);
4112 }
4113
4114 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
4115                                        struct ieee80211_vif *vif,
4116                                        const struct ieee80211_event *event)
4117 {
4118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
4119
4120         switch (event->type) {
4121         case MLME_EVENT:
4122                 iwl_mvm_event_mlme_callback(mvm, vif, event);
4123                 break;
4124         case BAR_RX_EVENT:
4125                 iwl_mvm_event_bar_rx_callback(mvm, vif, event);
4126                 break;
4127         case BA_FRAME_TIMEOUT:
4128                 iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
4129                 break;
4130         default:
4131                 break;
4132         }
4133 }
4134
4135 const struct ieee80211_ops iwl_mvm_hw_ops = {
4136         .tx = iwl_mvm_mac_tx,
4137         .ampdu_action = iwl_mvm_mac_ampdu_action,
4138         .start = iwl_mvm_mac_start,
4139         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
4140         .stop = iwl_mvm_mac_stop,
4141         .add_interface = iwl_mvm_mac_add_interface,
4142         .remove_interface = iwl_mvm_mac_remove_interface,
4143         .config = iwl_mvm_mac_config,
4144         .prepare_multicast = iwl_mvm_prepare_multicast,
4145         .configure_filter = iwl_mvm_configure_filter,
4146         .bss_info_changed = iwl_mvm_bss_info_changed,
4147         .hw_scan = iwl_mvm_mac_hw_scan,
4148         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
4149         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
4150         .sta_state = iwl_mvm_mac_sta_state,
4151         .sta_notify = iwl_mvm_mac_sta_notify,
4152         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
4153         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
4154         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4155         .sta_rc_update = iwl_mvm_sta_rc_update,
4156         .conf_tx = iwl_mvm_mac_conf_tx,
4157         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4158         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4159         .flush = iwl_mvm_mac_flush,
4160         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
4161         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4162         .set_key = iwl_mvm_mac_set_key,
4163         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
4164         .remain_on_channel = iwl_mvm_roc,
4165         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
4166         .add_chanctx = iwl_mvm_add_chanctx,
4167         .remove_chanctx = iwl_mvm_remove_chanctx,
4168         .change_chanctx = iwl_mvm_change_chanctx,
4169         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4170         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4171         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4172
4173         .start_ap = iwl_mvm_start_ap_ibss,
4174         .stop_ap = iwl_mvm_stop_ap_ibss,
4175         .join_ibss = iwl_mvm_start_ap_ibss,
4176         .leave_ibss = iwl_mvm_stop_ap_ibss,
4177
4178         .set_tim = iwl_mvm_set_tim,
4179
4180         .channel_switch = iwl_mvm_channel_switch,
4181         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4182         .post_channel_switch = iwl_mvm_post_channel_switch,
4183
4184         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4185         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4186         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4187
4188         .event_callback = iwl_mvm_mac_event_callback,
4189
4190         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4191
4192 #ifdef CONFIG_PM_SLEEP
4193         /* look at d3.c */
4194         .suspend = iwl_mvm_suspend,
4195         .resume = iwl_mvm_resume,
4196         .set_wakeup = iwl_mvm_set_wakeup,
4197         .set_rekey_data = iwl_mvm_set_rekey_data,
4198 #if IS_ENABLED(CONFIG_IPV6)
4199         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4200 #endif
4201         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4202 #endif
4203         .get_survey = iwl_mvm_mac_get_survey,
4204         .sta_statistics = iwl_mvm_mac_sta_statistics,
4205 };