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
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  43  *    notice, this list of conditions and the following disclaimer.
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  46  *    the documentation and/or other materials provided with the
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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,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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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 "fw-api-scan.h"
  84 #include "iwl-phy-db.h"
  85 #include "testmode.h"
  86 #include "iwl-fw-error-dump.h"
  87 #include "iwl-prph.h"
  88
  89 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  90         {
  91                 .max = 1,
  92                 .types = BIT(NL80211_IFTYPE_STATION),
  93         },
  94         {
  95                 .max = 1,
  96                 .types = BIT(NL80211_IFTYPE_AP) |
  97                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  98                         BIT(NL80211_IFTYPE_P2P_GO),
  99         },
 100         {
 101                 .max = 1,
 102                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 103         },
 104 };
 105
 106 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 107         {
 108                 .num_different_channels = 1,
 109                 .max_interfaces = 3,
 110                 .limits = iwl_mvm_limits,
 111                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 112         },
 113 };
 114
 115 #ifdef CONFIG_PM_SLEEP
 116 static const struct nl80211_wowlan_tcp_data_token_feature
 117 iwl_mvm_wowlan_tcp_token_feature = {
 118         .min_len = 0,
 119         .max_len = 255,
 120         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 121 };
 122
 123 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 124         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 125         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 126                             sizeof(struct ethhdr) -
 127                             sizeof(struct iphdr) -
 128                             sizeof(struct tcphdr),
 129         .data_interval_max = 65535, /* __le16 in API */
 130         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 131                             sizeof(struct ethhdr) -
 132                             sizeof(struct iphdr) -
 133                             sizeof(struct tcphdr),
 134         .seq = true,
 135 };
 136 #endif
 137
 138 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 139 /*
 140  * Use the reserved field to indicate magic values.
 141  * these values will only be used internally by the driver,
 142  * and won't make it to the fw (reserved will be 0).
 143  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 144  *      be the vif's ip address. in case there is not a single
 145  *      ip address (0, or more than 1), this attribute will
 146  *      be skipped.
 147  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 148  *      the LSB bytes of the vif's mac address
 149  */
 150 enum {
 151         BC_FILTER_MAGIC_NONE = 0,
 152         BC_FILTER_MAGIC_IP,
 153         BC_FILTER_MAGIC_MAC,
 154 };
 155
 156 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 157         {
 158                 /* arp */
 159                 .discard = 0,
 160                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 161                 .attrs = {
 162                         {
 163                                 /* frame type - arp, hw type - ethernet */
 164                                 .offset_type =
 165                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 166                                 .offset = sizeof(rfc1042_header),
 167                                 .val = cpu_to_be32(0x08060001),
 168                                 .mask = cpu_to_be32(0xffffffff),
 169                         },
 170                         {
 171                                 /* arp dest ip */
 172                                 .offset_type =
 173                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 174                                 .offset = sizeof(rfc1042_header) + 2 +
 175                                           sizeof(struct arphdr) +
 176                                           ETH_ALEN + sizeof(__be32) +
 177                                           ETH_ALEN,
 178                                 .mask = cpu_to_be32(0xffffffff),
 179                                 /* mark it as special field */
 180                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 181                         },
 182                 },
 183         },
 184         {
 185                 /* dhcp offer bcast */
 186                 .discard = 0,
 187                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 188                 .attrs = {
 189                         {
 190                                 /* udp dest port - 68 (bootp client)*/
 191                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 192                                 .offset = offsetof(struct udphdr, dest),
 193                                 .val = cpu_to_be32(0x00440000),
 194                                 .mask = cpu_to_be32(0xffff0000),
 195                         },
 196                         {
 197                                 /* dhcp - lsb bytes of client hw address */
 198                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 199                                 .offset = 38,
 200                                 .mask = cpu_to_be32(0xffffffff),
 201                                 /* mark it as special field */
 202                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 203                         },
 204                 },
 205         },
 206         /* last filter must be empty */
 207         {},
 208 };
 209 #endif
 210
 211 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 212 {
 213         if (!iwl_mvm_is_d0i3_supported(mvm))
 214                 return;
 215
 216         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 217         spin_lock_bh(&mvm->refs_lock);
 218         mvm->refs[ref_type]++;
 219         spin_unlock_bh(&mvm->refs_lock);
 220         iwl_trans_ref(mvm->trans);
 221 }
 222
 223 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 224 {
 225         if (!iwl_mvm_is_d0i3_supported(mvm))
 226                 return;
 227
 228         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 229         spin_lock_bh(&mvm->refs_lock);
 230         WARN_ON(!mvm->refs[ref_type]--);
 231         spin_unlock_bh(&mvm->refs_lock);
 232         iwl_trans_unref(mvm->trans);
 233 }
 234
 235 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 236                                      enum iwl_mvm_ref_type except_ref)
 237 {
 238         int i, j;
 239
 240         if (!iwl_mvm_is_d0i3_supported(mvm))
 241                 return;
 242
 243         spin_lock_bh(&mvm->refs_lock);
 244         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 245                 if (except_ref == i || !mvm->refs[i])
 246                         continue;
 247
 248                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 249                               i, mvm->refs[i]);
 250                 for (j = 0; j < mvm->refs[i]; j++)
 251                         iwl_trans_unref(mvm->trans);
 252                 mvm->refs[i] = 0;
 253         }
 254         spin_unlock_bh(&mvm->refs_lock);
 255 }
 256
 257 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 258 {
 259         int i;
 260         bool taken = false;
 261
 262         if (!iwl_mvm_is_d0i3_supported(mvm))
 263                 return true;
 264
 265         spin_lock_bh(&mvm->refs_lock);
 266         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 267                 if (mvm->refs[i]) {
 268                         taken = true;
 269                         break;
 270                 }
 271         }
 272         spin_unlock_bh(&mvm->refs_lock);
 273
 274         return taken;
 275 }
 276
 277 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 278 {
 279         iwl_mvm_ref(mvm, ref_type);
 280
 281         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 282                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 283                                 HZ)) {
 284                 WARN_ON_ONCE(1);
 285                 iwl_mvm_unref(mvm, ref_type);
 286                 return -EIO;
 287         }
 288
 289         return 0;
 290 }
 291
 292 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 293 {
 294         int i;
 295
 296         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 297         for (i = 0; i < NUM_PHY_CTX; i++) {
 298                 mvm->phy_ctxts[i].id = i;
 299                 mvm->phy_ctxts[i].ref = 0;
 300         }
 301 }
 302
 303 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 304 {
 305         struct ieee80211_hw *hw = mvm->hw;
 306         int num_mac, ret, i;
 307
 308         /* Tell mac80211 our characteristics */
 309         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 310                     IEEE80211_HW_SPECTRUM_MGMT |
 311                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 312                     IEEE80211_HW_QUEUE_CONTROL |
 313                     IEEE80211_HW_WANT_MONITOR_VIF |
 314                     IEEE80211_HW_SUPPORTS_PS |
 315                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 316                     IEEE80211_HW_AMPDU_AGGREGATION |
 317                     IEEE80211_HW_TIMING_BEACON_ONLY |
 318                     IEEE80211_HW_CONNECTION_MONITOR |
 319                     IEEE80211_HW_CHANCTX_STA_CSA |
 320                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 321
 322         hw->queues = mvm->first_agg_queue;
 323         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 324         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 325                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 326         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 327         hw->rate_control_algorithm = "iwl-mvm-rs";
 328
 329         /*
 330          * Enable 11w if advertised by firmware and software crypto
 331          * is not enabled (as the firmware will interpret some mgmt
 332          * packets, so enabling it with software crypto isn't safe)
 333          */
 334         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 335             !iwlwifi_mod_params.sw_crypto)
 336                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 337
 338         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 339             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 340             !iwlwifi_mod_params.uapsd_disable) {
 341                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 342                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 343                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 344         }
 345
 346         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
 347             mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
 348                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 349                 hw->wiphy->features |=
 350                         NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 351                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
 352         }
 353
 354         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 355         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 356         hw->chanctx_data_size = sizeof(u16);
 357
 358         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 359                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 360                 BIT(NL80211_IFTYPE_AP) |
 361                 BIT(NL80211_IFTYPE_P2P_GO) |
 362                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 363                 BIT(NL80211_IFTYPE_ADHOC);
 364
 365         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 366         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 367                                        REGULATORY_DISABLE_BEACON_HINTS;
 368
 369         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 370                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 371
 372         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 373                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 374
 375         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 376         hw->wiphy->n_iface_combinations =
 377                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 378
 379         hw->wiphy->max_remain_on_channel_duration = 10000;
 380         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 381
 382         /* Extract MAC address */
 383         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 384         hw->wiphy->addresses = mvm->addresses;
 385         hw->wiphy->n_addresses = 1;
 386
 387         /* Extract additional MAC addresses if available */
 388         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 389                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 390
 391         for (i = 1; i < num_mac; i++) {
 392                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 393                        ETH_ALEN);
 394                 mvm->addresses[i].addr[5]++;
 395                 hw->wiphy->n_addresses++;
 396         }
 397
 398         iwl_mvm_reset_phy_ctxts(mvm);
 399
 400         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 401
 402         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 403
 404         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 405                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 406                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 407         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 408                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 409                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 410
 411         hw->wiphy->hw_version = mvm->trans->hw_id;
 412
 413         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 414                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 415         else
 416                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 417
 418         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 419                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 420                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 421                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 422                 /* we create the 802.11 header and zero length SSID IE. */
 423                 hw->wiphy->max_sched_scan_ie_len =
 424                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 425         }
 426
 427         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 428                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 429                                NL80211_FEATURE_P2P_GO_OPPPS |
 430                                NL80211_FEATURE_DYNAMIC_SMPS |
 431                                NL80211_FEATURE_STATIC_SMPS |
 432                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 433
 434         if (mvm->fw->ucode_capa.capa[0] &
 435             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 436                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 437         if (mvm->fw->ucode_capa.capa[0] &
 438             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 439                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 440
 441         if (mvm->fw->ucode_capa.capa[0] &
 442             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 443                 hw->wiphy->features |=
 444                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 445
 446         if (mvm->fw->ucode_capa.capa[0] &
 447             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 448                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 449
 450         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 451
 452         /* currently FW API supports only one optional cipher scheme */
 453         if (mvm->fw->cs[0].cipher) {
 454                 mvm->hw->n_cipher_schemes = 1;
 455                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 456         }
 457
 458 #ifdef CONFIG_PM_SLEEP
 459         if (iwl_mvm_is_d0i3_supported(mvm) &&
 460             device_can_wakeup(mvm->trans->dev)) {
 461                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 462                 hw->wiphy->wowlan = &mvm->wowlan;
 463         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 464             mvm->trans->ops->d3_suspend &&
 465             mvm->trans->ops->d3_resume &&
 466             device_can_wakeup(mvm->trans->dev)) {
 467                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 468                                     WIPHY_WOWLAN_DISCONNECT |
 469                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 470                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 471                 if (!iwlwifi_mod_params.sw_crypto)
 472                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 473                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 474                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 475
 476                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 477                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 478                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 479                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 480                 hw->wiphy->wowlan = &mvm->wowlan;
 481         }
 482 #endif
 483
 484 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 485         /* assign default bcast filtering configuration */
 486         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 487 #endif
 488
 489         ret = iwl_mvm_leds_init(mvm);
 490         if (ret)
 491                 return ret;
 492
 493         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
 494                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 495                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 496         }
 497
 498         ret = ieee80211_register_hw(mvm->hw);
 499         if (ret)
 500                 iwl_mvm_leds_exit(mvm);
 501
 502         return ret;
 503 }
 504
 505 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 506                              struct ieee80211_sta *sta,
 507                              struct sk_buff *skb)
 508 {
 509         struct iwl_mvm_sta *mvmsta;
 510         bool defer = false;
 511
 512         /*
 513          * double check the IN_D0I3 flag both before and after
 514          * taking the spinlock, in order to prevent taking
 515          * the spinlock when not needed.
 516          */
 517         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 518                 return false;
 519
 520         spin_lock(&mvm->d0i3_tx_lock);
 521         /*
 522          * testing the flag again ensures the skb dequeue
 523          * loop (on d0i3 exit) hasn't run yet.
 524          */
 525         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 526                 goto out;
 527
 528         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 529         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 530             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 531                 goto out;
 532
 533         __skb_queue_tail(&mvm->d0i3_tx, skb);
 534         ieee80211_stop_queues(mvm->hw);
 535
 536         /* trigger wakeup */
 537         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 538         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 539
 540         defer = true;
 541 out:
 542         spin_unlock(&mvm->d0i3_tx_lock);
 543         return defer;
 544 }
 545
 546 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 547                            struct ieee80211_tx_control *control,
 548                            struct sk_buff *skb)
 549 {
 550         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 551         struct ieee80211_sta *sta = control->sta;
 552         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 553         struct ieee80211_hdr *hdr = (void *)skb->data;
 554
 555         if (iwl_mvm_is_radio_killed(mvm)) {
 556                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 557                 goto drop;
 558         }
 559
 560         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 561             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 562             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 563                 goto drop;
 564
 565         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 566         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 567                      ieee80211_is_mgmt(hdr->frame_control) &&
 568                      !ieee80211_is_deauth(hdr->frame_control) &&
 569                      !ieee80211_is_disassoc(hdr->frame_control) &&
 570                      !ieee80211_is_action(hdr->frame_control)))
 571                 sta = NULL;
 572
 573         if (sta) {
 574                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 575                         return;
 576                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 577                         goto drop;
 578                 return;
 579         }
 580
 581         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 582                 goto drop;
 583         return;
 584  drop:
 585         ieee80211_free_txskb(hw, skb);
 586 }
 587
 588 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 589 {
 590         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 591                 return false;
 592         return true;
 593 }
 594
 595 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 596 {
 597         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 598                 return false;
 599         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 600                 return true;
 601
 602         /* enabled by default */
 603         return true;
 604 }
 605
 606 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 607                                     struct ieee80211_vif *vif,
 608                                     enum ieee80211_ampdu_mlme_action action,
 609                                     struct ieee80211_sta *sta, u16 tid,
 610                                     u16 *ssn, u8 buf_size)
 611 {
 612         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 613         int ret;
 614         bool tx_agg_ref = false;
 615
 616         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 617                      sta->addr, tid, action);
 618
 619         if (!(mvm->nvm_data->sku_cap_11n_enable))
 620                 return -EACCES;
 621
 622         /* return from D0i3 before starting a new Tx aggregation */
 623         switch (action) {
 624         case IEEE80211_AMPDU_TX_START:
 625         case IEEE80211_AMPDU_TX_STOP_CONT:
 626         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 627         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 628         case IEEE80211_AMPDU_TX_OPERATIONAL:
 629                 /*
 630                  * for tx start, wait synchronously until D0i3 exit to
 631                  * get the correct sequence number for the tid.
 632                  * additionally, some other ampdu actions use direct
 633                  * target access, which is not handled automatically
 634                  * by the trans layer (unlike commands), so wait for
 635                  * d0i3 exit in these cases as well.
 636                  */
 637                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 638                 if (ret)
 639                         return ret;
 640
 641                 tx_agg_ref = true;
 642                 break;
 643         default:
 644                 break;
 645         }
 646
 647         mutex_lock(&mvm->mutex);
 648
 649         switch (action) {
 650         case IEEE80211_AMPDU_RX_START:
 651                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 652                         ret = -EINVAL;
 653                         break;
 654                 }
 655                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 656                 break;
 657         case IEEE80211_AMPDU_RX_STOP:
 658                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 659                 break;
 660         case IEEE80211_AMPDU_TX_START:
 661                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 662                         ret = -EINVAL;
 663                         break;
 664                 }
 665                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 666                 break;
 667         case IEEE80211_AMPDU_TX_STOP_CONT:
 668                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 669                 break;
 670         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 671         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 672                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 673                 break;
 674         case IEEE80211_AMPDU_TX_OPERATIONAL:
 675                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 676                 break;
 677         default:
 678                 WARN_ON_ONCE(1);
 679                 ret = -EINVAL;
 680                 break;
 681         }
 682         mutex_unlock(&mvm->mutex);
 683
 684         /*
 685          * If the tid is marked as started, we won't use it for offloaded
 686          * traffic on the next D0i3 entry. It's safe to unref.
 687          */
 688         if (tx_agg_ref)
 689                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 690
 691         return ret;
 692 }
 693
 694 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 695                                      struct ieee80211_vif *vif)
 696 {
 697         struct iwl_mvm *mvm = data;
 698         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 699
 700         mvmvif->uploaded = false;
 701         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 702
 703         /* does this make sense at all? */
 704         mvmvif->color++;
 705
 706         spin_lock_bh(&mvm->time_event_lock);
 707         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 708         spin_unlock_bh(&mvm->time_event_lock);
 709
 710         mvmvif->phy_ctxt = NULL;
 711         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 712 }
 713
 714 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 715                                      const void *data, size_t datalen)
 716 {
 717         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 718         ssize_t bytes_read;
 719         ssize_t bytes_read_trans;
 720
 721         if (offset < dump_ptrs->op_mode_len) {
 722                 bytes_read = min_t(ssize_t, count,
 723                                    dump_ptrs->op_mode_len - offset);
 724                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 725                        bytes_read);
 726                 offset += bytes_read;
 727                 count -= bytes_read;
 728
 729                 if (count == 0)
 730                         return bytes_read;
 731         } else {
 732                 bytes_read = 0;
 733         }
 734
 735         if (!dump_ptrs->trans_ptr)
 736                 return bytes_read;
 737
 738         offset -= dump_ptrs->op_mode_len;
 739         bytes_read_trans = min_t(ssize_t, count,
 740                                  dump_ptrs->trans_ptr->len - offset);
 741         memcpy(buffer + bytes_read,
 742                (u8 *)dump_ptrs->trans_ptr->data + offset,
 743                bytes_read_trans);
 744
 745         return bytes_read + bytes_read_trans;
 746 }
 747
 748 static void iwl_mvm_free_coredump(const void *data)
 749 {
 750         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 751
 752         vfree(fw_error_dump->op_mode_ptr);
 753         vfree(fw_error_dump->trans_ptr);
 754         kfree(fw_error_dump);
 755 }
 756
 757 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 758 {
 759         struct iwl_fw_error_dump_file *dump_file;
 760         struct iwl_fw_error_dump_data *dump_data;
 761         struct iwl_fw_error_dump_info *dump_info;
 762         struct iwl_mvm_dump_ptrs *fw_error_dump;
 763         const struct fw_img *img;
 764         u32 sram_len, sram_ofs;
 765         u32 file_len, rxf_len;
 766         unsigned long flags;
 767         int reg_val;
 768
 769         lockdep_assert_held(&mvm->mutex);
 770
 771         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
 772         if (!fw_error_dump)
 773                 return;
 774
 775         img = &mvm->fw->img[mvm->cur_ucode];
 776         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 777         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 778
 779         /* reading buffer size */
 780         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 781         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 782
 783         /* the register holds the value divided by 128 */
 784         rxf_len = rxf_len << 7;
 785
 786         file_len = sizeof(*dump_file) +
 787                    sizeof(*dump_data) * 3 +
 788                    sram_len +
 789                    rxf_len +
 790                    sizeof(*dump_info);
 791
 792         dump_file = vzalloc(file_len);
 793         if (!dump_file) {
 794                 kfree(fw_error_dump);
 795                 return;
 796         }
 797
 798         fw_error_dump->op_mode_ptr = dump_file;
 799
 800         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 801         dump_data = (void *)dump_file->data;
 802
 803         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 804         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 805         dump_info = (void *) dump_data->data;
 806         dump_info->device_family =
 807                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 808                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 809                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 810         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 811                sizeof(dump_info->fw_human_readable));
 812         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 813                 sizeof(dump_info->dev_human_readable));
 814         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 815                 sizeof(dump_info->bus_human_readable));
 816
 817         dump_data = iwl_fw_error_next_data(dump_data);
 818         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 819         dump_data->len = cpu_to_le32(rxf_len);
 820
 821         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 822                 u32 *rxf = (void *)dump_data->data;
 823                 int i;
 824
 825                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 826                         iwl_trans_write_prph(mvm->trans,
 827                                              RXF_LD_FENCE_OFFSET_ADDR,
 828                                              i * sizeof(u32));
 829                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 830                                                      RXF_FIFO_RD_FENCE_ADDR);
 831                 }
 832                 iwl_trans_release_nic_access(mvm->trans, &flags);
 833         }
 834
 835         dump_data = iwl_fw_error_next_data(dump_data);
 836         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 837         dump_data->len = cpu_to_le32(sram_len);
 838         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 839                                  sram_len);
 840
 841         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 842         fw_error_dump->op_mode_len = file_len;
 843         if (fw_error_dump->trans_ptr)
 844                 file_len += fw_error_dump->trans_ptr->len;
 845         dump_file->file_len = cpu_to_le32(file_len);
 846
 847         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
 848                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
 849 }
 850
 851 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 852 {
 853         /* clear the D3 reconfig, we only need it to avoid dumping a
 854          * firmware coredump on reconfiguration, we shouldn't do that
 855          * on D3->D0 transition
 856          */
 857         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
 858                 iwl_mvm_fw_error_dump(mvm);
 859
 860         iwl_trans_stop_device(mvm->trans);
 861
 862         mvm->scan_status = IWL_MVM_SCAN_NONE;
 863         mvm->ps_disabled = false;
 864         mvm->calibrating = false;
 865
 866         /* just in case one was running */
 867         ieee80211_remain_on_channel_expired(mvm->hw);
 868
 869         ieee80211_iterate_active_interfaces_atomic(
 870                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 871                 iwl_mvm_cleanup_iterator, mvm);
 872
 873         mvm->p2p_device_vif = NULL;
 874         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 875
 876         iwl_mvm_reset_phy_ctxts(mvm);
 877         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 878         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 879         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
 880         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 881         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 882         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 883         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 884         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 885         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 886
 887         ieee80211_wake_queues(mvm->hw);
 888
 889         /* cleanup all stale references (scan, roc), but keep the
 890          * ucode_down ref until reconfig is complete */
 891         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 892
 893         /* clear any stale d0i3 state */
 894         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 895
 896         mvm->vif_count = 0;
 897         mvm->rx_ba_sessions = 0;
 898 }
 899
 900 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 901 {
 902         int ret;
 903
 904         lockdep_assert_held(&mvm->mutex);
 905
 906         /* Clean up some internal and mac80211 state on restart */
 907         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 908                 iwl_mvm_restart_cleanup(mvm);
 909
 910         ret = iwl_mvm_up(mvm);
 911
 912         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 913                 /* Something went wrong - we need to finish some cleanup
 914                  * that normally iwl_mvm_mac_restart_complete() below
 915                  * would do.
 916                  */
 917                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 918                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 919         }
 920
 921         return ret;
 922 }
 923
 924 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 925 {
 926         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 927         int ret;
 928
 929         mutex_lock(&mvm->mutex);
 930         ret = __iwl_mvm_mac_start(mvm);
 931         mutex_unlock(&mvm->mutex);
 932
 933         return ret;
 934 }
 935
 936 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 937 {
 938         int ret;
 939
 940         mutex_lock(&mvm->mutex);
 941
 942         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 943         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 944         ret = iwl_mvm_update_quotas(mvm, NULL);
 945         if (ret)
 946                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 947                         ret);
 948
 949         /* allow transport/FW low power modes */
 950         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 951
 952         /*
 953          * If we have TDLS peers, remove them. We don't know the last seqno/PN
 954          * of packets the FW sent out, so we must reconnect.
 955          */
 956         iwl_mvm_teardown_tdls_peers(mvm);
 957
 958         mutex_unlock(&mvm->mutex);
 959 }
 960
 961 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
 962 {
 963         bool exit_now;
 964
 965         if (!iwl_mvm_is_d0i3_supported(mvm))
 966                 return;
 967
 968         mutex_lock(&mvm->d0i3_suspend_mutex);
 969         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
 970         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
 971                                         &mvm->d0i3_suspend_flags);
 972         mutex_unlock(&mvm->d0i3_suspend_mutex);
 973
 974         if (exit_now) {
 975                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
 976                 _iwl_mvm_exit_d0i3(mvm);
 977         }
 978 }
 979
 980 static void
 981 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
 982                               enum ieee80211_reconfig_type reconfig_type)
 983 {
 984         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 985
 986         switch (reconfig_type) {
 987         case IEEE80211_RECONFIG_TYPE_RESTART:
 988                 iwl_mvm_restart_complete(mvm);
 989                 break;
 990         case IEEE80211_RECONFIG_TYPE_SUSPEND:
 991                 iwl_mvm_resume_complete(mvm);
 992                 break;
 993         }
 994 }
 995
 996 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 997 {
 998         lockdep_assert_held(&mvm->mutex);
 999
1000         /* disallow low power states when the FW is down */
1001         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1002
1003         /* async_handlers_wk is now blocked */
1004
1005         /*
1006          * The work item could be running or queued if the
1007          * ROC time event stops just as we get here.
1008          */
1009         cancel_work_sync(&mvm->roc_done_wk);
1010
1011         iwl_trans_stop_device(mvm->trans);
1012
1013         iwl_mvm_async_handlers_purge(mvm);
1014         /* async_handlers_list is empty and will stay empty: HW is stopped */
1015
1016         /* the fw is stopped, the aux sta is dead: clean up driver state */
1017         iwl_mvm_del_aux_sta(mvm);
1018
1019         mvm->ucode_loaded = false;
1020 }
1021
1022 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1023 {
1024         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1025
1026         flush_work(&mvm->d0i3_exit_work);
1027         flush_work(&mvm->async_handlers_wk);
1028         flush_work(&mvm->fw_error_dump_wk);
1029
1030         mutex_lock(&mvm->mutex);
1031         __iwl_mvm_mac_stop(mvm);
1032         mutex_unlock(&mvm->mutex);
1033
1034         /*
1035          * The worker might have been waiting for the mutex, let it run and
1036          * discover that its list is now empty.
1037          */
1038         cancel_work_sync(&mvm->async_handlers_wk);
1039 }
1040
1041 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1042 {
1043         u16 i;
1044
1045         lockdep_assert_held(&mvm->mutex);
1046
1047         for (i = 0; i < NUM_PHY_CTX; i++)
1048                 if (!mvm->phy_ctxts[i].ref)
1049                         return &mvm->phy_ctxts[i];
1050
1051         IWL_ERR(mvm, "No available PHY context\n");
1052         return NULL;
1053 }
1054
1055 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1056                                 s8 tx_power)
1057 {
1058         /* FW is in charge of regulatory enforcement */
1059         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1060                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1061                 .pwr_restriction = cpu_to_le16(tx_power),
1062         };
1063
1064         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1065                                     sizeof(reduce_txpwr_cmd),
1066                                     &reduce_txpwr_cmd);
1067 }
1068
1069 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1070                                      struct ieee80211_vif *vif)
1071 {
1072         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1073         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1074         int ret;
1075
1076         /*
1077          * make sure D0i3 exit is completed, otherwise a target access
1078          * during tx queue configuration could be done when still in
1079          * D0i3 state.
1080          */
1081         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1082         if (ret)
1083                 return ret;
1084
1085         /*
1086          * Not much to do here. The stack will not allow interface
1087          * types or combinations that we didn't advertise, so we
1088          * don't really have to check the types.
1089          */
1090
1091         mutex_lock(&mvm->mutex);
1092
1093         /* Allocate resources for the MAC context, and add it to the fw  */
1094         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1095         if (ret)
1096                 goto out_unlock;
1097
1098         /* Counting number of interfaces is needed for legacy PM */
1099         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1100                 mvm->vif_count++;
1101
1102         /*
1103          * The AP binding flow can be done only after the beacon
1104          * template is configured (which happens only in the mac80211
1105          * start_ap() flow), and adding the broadcast station can happen
1106          * only after the binding.
1107          * In addition, since modifying the MAC before adding a bcast
1108          * station is not allowed by the FW, delay the adding of MAC context to
1109          * the point where we can also add the bcast station.
1110          * In short: there's not much we can do at this point, other than
1111          * allocating resources :)
1112          */
1113         if (vif->type == NL80211_IFTYPE_AP ||
1114             vif->type == NL80211_IFTYPE_ADHOC) {
1115                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1116                 if (ret) {
1117                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1118                         goto out_release;
1119                 }
1120
1121                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1122                 goto out_unlock;
1123         }
1124
1125         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1126         if (ret)
1127                 goto out_release;
1128
1129         ret = iwl_mvm_power_update_mac(mvm);
1130         if (ret)
1131                 goto out_release;
1132
1133         /* beacon filtering */
1134         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1135         if (ret)
1136                 goto out_remove_mac;
1137
1138         if (!mvm->bf_allowed_vif &&
1139             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1140                 mvm->bf_allowed_vif = mvmvif;
1141                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1142                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1143         }
1144
1145         /*
1146          * P2P_DEVICE interface does not have a channel context assigned to it,
1147          * so a dedicated PHY context is allocated to it and the corresponding
1148          * MAC context is bound to it at this stage.
1149          */
1150         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1151
1152                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1153                 if (!mvmvif->phy_ctxt) {
1154                         ret = -ENOSPC;
1155                         goto out_free_bf;
1156                 }
1157
1158                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1159                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1160                 if (ret)
1161                         goto out_unref_phy;
1162
1163                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1164                 if (ret)
1165                         goto out_unbind;
1166
1167                 /* Save a pointer to p2p device vif, so it can later be used to
1168                  * update the p2p device MAC when a GO is started/stopped */
1169                 mvm->p2p_device_vif = vif;
1170         }
1171
1172         iwl_mvm_vif_dbgfs_register(mvm, vif);
1173         goto out_unlock;
1174
1175  out_unbind:
1176         iwl_mvm_binding_remove_vif(mvm, vif);
1177  out_unref_phy:
1178         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1179  out_free_bf:
1180         if (mvm->bf_allowed_vif == mvmvif) {
1181                 mvm->bf_allowed_vif = NULL;
1182                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1183                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1184         }
1185  out_remove_mac:
1186         mvmvif->phy_ctxt = NULL;
1187         iwl_mvm_mac_ctxt_remove(mvm, vif);
1188  out_release:
1189         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1190                 mvm->vif_count--;
1191
1192         iwl_mvm_mac_ctxt_release(mvm, vif);
1193  out_unlock:
1194         mutex_unlock(&mvm->mutex);
1195
1196         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1197
1198         return ret;
1199 }
1200
1201 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1202                                         struct ieee80211_vif *vif)
1203 {
1204         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1205
1206         if (tfd_msk) {
1207                 mutex_lock(&mvm->mutex);
1208                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1209                 mutex_unlock(&mvm->mutex);
1210         }
1211
1212         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1213                 /*
1214                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1215                  * We assume here that all the packets sent to the OFFCHANNEL
1216                  * queue are sent in ROC session.
1217                  */
1218                 flush_work(&mvm->roc_done_wk);
1219         } else {
1220                 /*
1221                  * By now, all the AC queues are empty. The AGG queues are
1222                  * empty too. We already got all the Tx responses for all the
1223                  * packets in the queues. The drain work can have been
1224                  * triggered. Flush it.
1225                  */
1226                 flush_work(&mvm->sta_drained_wk);
1227         }
1228 }
1229
1230 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1231                                          struct ieee80211_vif *vif)
1232 {
1233         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1234         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1235
1236         iwl_mvm_prepare_mac_removal(mvm, vif);
1237
1238         mutex_lock(&mvm->mutex);
1239
1240         if (mvm->bf_allowed_vif == mvmvif) {
1241                 mvm->bf_allowed_vif = NULL;
1242                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1243                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1244         }
1245
1246         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1247
1248         /*
1249          * For AP/GO interface, the tear down of the resources allocated to the
1250          * interface is be handled as part of the stop_ap flow.
1251          */
1252         if (vif->type == NL80211_IFTYPE_AP ||
1253             vif->type == NL80211_IFTYPE_ADHOC) {
1254 #ifdef CONFIG_NL80211_TESTMODE
1255                 if (vif == mvm->noa_vif) {
1256                         mvm->noa_vif = NULL;
1257                         mvm->noa_duration = 0;
1258                 }
1259 #endif
1260                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1261                 goto out_release;
1262         }
1263
1264         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1265                 mvm->p2p_device_vif = NULL;
1266                 iwl_mvm_rm_bcast_sta(mvm, vif);
1267                 iwl_mvm_binding_remove_vif(mvm, vif);
1268                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1269                 mvmvif->phy_ctxt = NULL;
1270         }
1271
1272         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1273                 mvm->vif_count--;
1274
1275         iwl_mvm_power_update_mac(mvm);
1276         iwl_mvm_mac_ctxt_remove(mvm, vif);
1277
1278 out_release:
1279         iwl_mvm_mac_ctxt_release(mvm, vif);
1280         mutex_unlock(&mvm->mutex);
1281 }
1282
1283 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1284 {
1285         return 0;
1286 }
1287
1288 struct iwl_mvm_mc_iter_data {
1289         struct iwl_mvm *mvm;
1290         int port_id;
1291 };
1292
1293 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1294                                       struct ieee80211_vif *vif)
1295 {
1296         struct iwl_mvm_mc_iter_data *data = _data;
1297         struct iwl_mvm *mvm = data->mvm;
1298         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1299         int ret, len;
1300
1301         /* if we don't have free ports, mcast frames will be dropped */
1302         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1303                 return;
1304
1305         if (vif->type != NL80211_IFTYPE_STATION ||
1306             !vif->bss_conf.assoc)
1307                 return;
1308
1309         cmd->port_id = data->port_id++;
1310         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1311         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1312
1313         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1314         if (ret)
1315                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1316 }
1317
1318 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1319 {
1320         struct iwl_mvm_mc_iter_data iter_data = {
1321                 .mvm = mvm,
1322         };
1323
1324         lockdep_assert_held(&mvm->mutex);
1325
1326         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1327                 return;
1328
1329         ieee80211_iterate_active_interfaces_atomic(
1330                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1331                 iwl_mvm_mc_iface_iterator, &iter_data);
1332 }
1333
1334 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1335                                      struct netdev_hw_addr_list *mc_list)
1336 {
1337         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1338         struct iwl_mcast_filter_cmd *cmd;
1339         struct netdev_hw_addr *addr;
1340         int addr_count;
1341         bool pass_all;
1342         int len;
1343
1344         addr_count = netdev_hw_addr_list_count(mc_list);
1345         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1346                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1347         if (pass_all)
1348                 addr_count = 0;
1349
1350         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1351         cmd = kzalloc(len, GFP_ATOMIC);
1352         if (!cmd)
1353                 return 0;
1354
1355         if (pass_all) {
1356                 cmd->pass_all = 1;
1357                 return (u64)(unsigned long)cmd;
1358         }
1359
1360         netdev_hw_addr_list_for_each(addr, mc_list) {
1361                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1362                                    cmd->count, addr->addr);
1363                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1364                        addr->addr, ETH_ALEN);
1365                 cmd->count++;
1366         }
1367
1368         return (u64)(unsigned long)cmd;
1369 }
1370
1371 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1372                                      unsigned int changed_flags,
1373                                      unsigned int *total_flags,
1374                                      u64 multicast)
1375 {
1376         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1377         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1378
1379         mutex_lock(&mvm->mutex);
1380
1381         /* replace previous configuration */
1382         kfree(mvm->mcast_filter_cmd);
1383         mvm->mcast_filter_cmd = cmd;
1384
1385         if (!cmd)
1386                 goto out;
1387
1388         iwl_mvm_recalc_multicast(mvm);
1389 out:
1390         mutex_unlock(&mvm->mutex);
1391         *total_flags = 0;
1392 }
1393
1394 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1395 struct iwl_bcast_iter_data {
1396         struct iwl_mvm *mvm;
1397         struct iwl_bcast_filter_cmd *cmd;
1398         u8 current_filter;
1399 };
1400
1401 static void
1402 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1403                          const struct iwl_fw_bcast_filter *in_filter,
1404                          struct iwl_fw_bcast_filter *out_filter)
1405 {
1406         struct iwl_fw_bcast_filter_attr *attr;
1407         int i;
1408
1409         memcpy(out_filter, in_filter, sizeof(*out_filter));
1410
1411         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1412                 attr = &out_filter->attrs[i];
1413
1414                 if (!attr->mask)
1415                         break;
1416
1417                 switch (attr->reserved1) {
1418                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1419                         if (vif->bss_conf.arp_addr_cnt != 1) {
1420                                 attr->mask = 0;
1421                                 continue;
1422                         }
1423
1424                         attr->val = vif->bss_conf.arp_addr_list[0];
1425                         break;
1426                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1427                         attr->val = *(__be32 *)&vif->addr[2];
1428                         break;
1429                 default:
1430                         break;
1431                 }
1432                 attr->reserved1 = 0;
1433                 out_filter->num_attrs++;
1434         }
1435 }
1436
1437 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1438                                           struct ieee80211_vif *vif)
1439 {
1440         struct iwl_bcast_iter_data *data = _data;
1441         struct iwl_mvm *mvm = data->mvm;
1442         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1443         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1444         struct iwl_fw_bcast_mac *bcast_mac;
1445         int i;
1446
1447         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1448                 return;
1449
1450         bcast_mac = &cmd->macs[mvmvif->id];
1451
1452         /*
1453          * enable filtering only for associated stations, but not for P2P
1454          * Clients
1455          */
1456         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1457             !vif->bss_conf.assoc)
1458                 return;
1459
1460         bcast_mac->default_discard = 1;
1461
1462         /* copy all configured filters */
1463         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1464                 /*
1465                  * Make sure we don't exceed our filters limit.
1466                  * if there is still a valid filter to be configured,
1467                  * be on the safe side and just allow bcast for this mac.
1468                  */
1469                 if (WARN_ON_ONCE(data->current_filter >=
1470                                  ARRAY_SIZE(cmd->filters))) {
1471                         bcast_mac->default_discard = 0;
1472                         bcast_mac->attached_filters = 0;
1473                         break;
1474                 }
1475
1476                 iwl_mvm_set_bcast_filter(vif,
1477                                          &mvm->bcast_filters[i],
1478                                          &cmd->filters[data->current_filter]);
1479
1480                 /* skip current filter if it contains no attributes */
1481                 if (!cmd->filters[data->current_filter].num_attrs)
1482                         continue;
1483
1484                 /* attach the filter to current mac */
1485                 bcast_mac->attached_filters |=
1486                                 cpu_to_le16(BIT(data->current_filter));
1487
1488                 data->current_filter++;
1489         }
1490 }
1491
1492 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1493                                     struct iwl_bcast_filter_cmd *cmd)
1494 {
1495         struct iwl_bcast_iter_data iter_data = {
1496                 .mvm = mvm,
1497                 .cmd = cmd,
1498         };
1499
1500         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1501                 return false;
1502
1503         memset(cmd, 0, sizeof(*cmd));
1504         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1505         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1506
1507 #ifdef CONFIG_IWLWIFI_DEBUGFS
1508         /* use debugfs filters/macs if override is configured */
1509         if (mvm->dbgfs_bcast_filtering.override) {
1510                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1511                        sizeof(cmd->filters));
1512                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1513                        sizeof(cmd->macs));
1514                 return true;
1515         }
1516 #endif
1517
1518         /* if no filters are configured, do nothing */
1519         if (!mvm->bcast_filters)
1520                 return false;
1521
1522         /* configure and attach these filters for each associated sta vif */
1523         ieee80211_iterate_active_interfaces(
1524                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1525                 iwl_mvm_bcast_filter_iterator, &iter_data);
1526
1527         return true;
1528 }
1529 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1530                                           struct ieee80211_vif *vif)
1531 {
1532         struct iwl_bcast_filter_cmd cmd;
1533
1534         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1535                 return 0;
1536
1537         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1538                 return 0;
1539
1540         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1541                                     sizeof(cmd), &cmd);
1542 }
1543 #else
1544 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1545                                                  struct ieee80211_vif *vif)
1546 {
1547         return 0;
1548 }
1549 #endif
1550
1551 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1552                                              struct ieee80211_vif *vif,
1553                                              struct ieee80211_bss_conf *bss_conf,
1554                                              u32 changes)
1555 {
1556         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1557         int ret;
1558
1559         /*
1560          * Re-calculate the tsf id, as the master-slave relations depend on the
1561          * beacon interval, which was not known when the station interface was
1562          * added.
1563          */
1564         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1565                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1566
1567         /*
1568          * If we're not associated yet, take the (new) BSSID before associating
1569          * so the firmware knows. If we're already associated, then use the old
1570          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1571          * branch for disassociation below.
1572          */
1573         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1574                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1575
1576         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1577         if (ret)
1578                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1579
1580         /* after sending it once, adopt mac80211 data */
1581         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1582         mvmvif->associated = bss_conf->assoc;
1583
1584         if (changes & BSS_CHANGED_ASSOC) {
1585                 if (bss_conf->assoc) {
1586                         /* add quota for this interface */
1587                         ret = iwl_mvm_update_quotas(mvm, NULL);
1588                         if (ret) {
1589                                 IWL_ERR(mvm, "failed to update quotas\n");
1590                                 return;
1591                         }
1592
1593                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1594                                      &mvm->status)) {
1595                                 /*
1596                                  * If we're restarting then the firmware will
1597                                  * obviously have lost synchronisation with
1598                                  * the AP. It will attempt to synchronise by
1599                                  * itself, but we can make it more reliable by
1600                                  * scheduling a session protection time event.
1601                                  *
1602                                  * The firmware needs to receive a beacon to
1603                                  * catch up with synchronisation, use 110% of
1604                                  * the beacon interval.
1605                                  *
1606                                  * Set a large maximum delay to allow for more
1607                                  * than a single interface.
1608                                  */
1609                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1610                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1611                                                         5 * dur, false);
1612                         }
1613
1614                         iwl_mvm_sf_update(mvm, vif, false);
1615                         iwl_mvm_power_vif_assoc(mvm, vif);
1616                         if (vif->p2p) {
1617                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1618                                 iwl_mvm_update_smps(mvm, vif,
1619                                                     IWL_MVM_SMPS_REQ_PROT,
1620                                                     IEEE80211_SMPS_DYNAMIC);
1621                         }
1622                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1623                         /*
1624                          * If update fails - SF might be running in associated
1625                          * mode while disassociated - which is forbidden.
1626                          */
1627                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1628                                   "Failed to update SF upon disassociation\n");
1629
1630                         /* remove AP station now that the MAC is unassoc */
1631                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1632                         if (ret)
1633                                 IWL_ERR(mvm, "failed to remove AP station\n");
1634
1635                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1636                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1637                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1638                         /* remove quota for this interface */
1639                         ret = iwl_mvm_update_quotas(mvm, NULL);
1640                         if (ret)
1641                                 IWL_ERR(mvm, "failed to update quotas\n");
1642
1643                         if (vif->p2p)
1644                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1645
1646                         /* this will take the cleared BSSID from bss_conf */
1647                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1648                         if (ret)
1649                                 IWL_ERR(mvm,
1650                                         "failed to update MAC %pM (clear after unassoc)\n",
1651                                         vif->addr);
1652                 }
1653
1654                 iwl_mvm_recalc_multicast(mvm);
1655                 iwl_mvm_configure_bcast_filter(mvm, vif);
1656
1657                 /* reset rssi values */
1658                 mvmvif->bf_data.ave_beacon_signal = 0;
1659
1660                 iwl_mvm_bt_coex_vif_change(mvm);
1661                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1662                                     IEEE80211_SMPS_AUTOMATIC);
1663         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1664                 /*
1665                  * We received a beacon _after_ association so
1666                  * remove the session protection.
1667                  */
1668                 iwl_mvm_remove_time_event(mvm, mvmvif,
1669                                           &mvmvif->time_event_data);
1670         }
1671
1672         if (changes & BSS_CHANGED_BEACON_INFO) {
1673                 iwl_mvm_sf_update(mvm, vif, false);
1674                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1675         }
1676
1677         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1678                 ret = iwl_mvm_power_update_mac(mvm);
1679                 if (ret)
1680                         IWL_ERR(mvm, "failed to update power mode\n");
1681         }
1682
1683         if (changes & BSS_CHANGED_TXPOWER) {
1684                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1685                                 bss_conf->txpower);
1686                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1687         }
1688
1689         if (changes & BSS_CHANGED_CQM) {
1690                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1691                 /* reset cqm events tracking */
1692                 mvmvif->bf_data.last_cqm_event = 0;
1693                 if (mvmvif->bf_data.bf_enabled) {
1694                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1695                         if (ret)
1696                                 IWL_ERR(mvm,
1697                                         "failed to update CQM thresholds\n");
1698                 }
1699         }
1700
1701         if (changes & BSS_CHANGED_ARP_FILTER) {
1702                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1703                 iwl_mvm_configure_bcast_filter(mvm, vif);
1704         }
1705 }
1706
1707 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1708                                  struct ieee80211_vif *vif)
1709 {
1710         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1711         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1712         int ret;
1713
1714         /*
1715          * iwl_mvm_mac_ctxt_add() might read directly from the device
1716          * (the system time), so make sure it is available.
1717          */
1718         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1719         if (ret)
1720                 return ret;
1721
1722         mutex_lock(&mvm->mutex);
1723
1724         /* Send the beacon template */
1725         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1726         if (ret)
1727                 goto out_unlock;
1728
1729         /*
1730          * Re-calculate the tsf id, as the master-slave relations depend on the
1731          * beacon interval, which was not known when the AP interface was added.
1732          */
1733         if (vif->type == NL80211_IFTYPE_AP)
1734                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1735
1736         /* Add the mac context */
1737         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1738         if (ret)
1739                 goto out_unlock;
1740
1741         /* Perform the binding */
1742         ret = iwl_mvm_binding_add_vif(mvm, vif);
1743         if (ret)
1744                 goto out_remove;
1745
1746         /* Send the bcast station. At this stage the TBTT and DTIM time events
1747          * are added and applied to the scheduler */
1748         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1749         if (ret)
1750                 goto out_unbind;
1751
1752         /* must be set before quota calculations */
1753         mvmvif->ap_ibss_active = true;
1754
1755         /* power updated needs to be done before quotas */
1756         iwl_mvm_power_update_mac(mvm);
1757
1758         ret = iwl_mvm_update_quotas(mvm, NULL);
1759         if (ret)
1760                 goto out_quota_failed;
1761
1762         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1763         if (vif->p2p && mvm->p2p_device_vif)
1764                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1765
1766         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1767
1768         iwl_mvm_bt_coex_vif_change(mvm);
1769
1770         /* we don't support TDLS during DCM */
1771         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1772                 iwl_mvm_teardown_tdls_peers(mvm);
1773
1774         mutex_unlock(&mvm->mutex);
1775         return 0;
1776
1777 out_quota_failed:
1778         iwl_mvm_power_update_mac(mvm);
1779         mvmvif->ap_ibss_active = false;
1780         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1781 out_unbind:
1782         iwl_mvm_binding_remove_vif(mvm, vif);
1783 out_remove:
1784         iwl_mvm_mac_ctxt_remove(mvm, vif);
1785 out_unlock:
1786         mutex_unlock(&mvm->mutex);
1787         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1788         return ret;
1789 }
1790
1791 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1792                                  struct ieee80211_vif *vif)
1793 {
1794         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1795         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1796
1797         iwl_mvm_prepare_mac_removal(mvm, vif);
1798
1799         mutex_lock(&mvm->mutex);
1800
1801         /* Handle AP stop while in CSA */
1802         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1803                 iwl_mvm_remove_time_event(mvm, mvmvif,
1804                                           &mvmvif->time_event_data);
1805                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1806         }
1807
1808         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1809                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1810                 mvm->csa_tx_block_bcn_timeout = 0;
1811         }
1812
1813         mvmvif->ap_ibss_active = false;
1814         mvm->ap_last_beacon_gp2 = 0;
1815
1816         iwl_mvm_bt_coex_vif_change(mvm);
1817
1818         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1819
1820         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1821         if (vif->p2p && mvm->p2p_device_vif)
1822                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1823
1824         iwl_mvm_update_quotas(mvm, NULL);
1825         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1826         iwl_mvm_binding_remove_vif(mvm, vif);
1827
1828         iwl_mvm_power_update_mac(mvm);
1829
1830         iwl_mvm_mac_ctxt_remove(mvm, vif);
1831
1832         mutex_unlock(&mvm->mutex);
1833 }
1834
1835 static void
1836 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1837                                  struct ieee80211_vif *vif,
1838                                  struct ieee80211_bss_conf *bss_conf,
1839                                  u32 changes)
1840 {
1841         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1842
1843         /* Changes will be applied when the AP/IBSS is started */
1844         if (!mvmvif->ap_ibss_active)
1845                 return;
1846
1847         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1848                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1849             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1850                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1851
1852         /* Need to send a new beacon template to the FW */
1853         if (changes & BSS_CHANGED_BEACON &&
1854             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1855                 IWL_WARN(mvm, "Failed updating beacon data\n");
1856
1857         if (changes & BSS_CHANGED_TXPOWER) {
1858                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1859                                 bss_conf->txpower);
1860                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1861         }
1862
1863 }
1864
1865 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1866                                      struct ieee80211_vif *vif,
1867                                      struct ieee80211_bss_conf *bss_conf,
1868                                      u32 changes)
1869 {
1870         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1871
1872         /*
1873          * iwl_mvm_bss_info_changed_station() might call
1874          * iwl_mvm_protect_session(), which reads directly from
1875          * the device (the system time), so make sure it is available.
1876          */
1877         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1878                 return;
1879
1880         mutex_lock(&mvm->mutex);
1881
1882         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1883                 iwl_mvm_scan_offload_stop(mvm, true);
1884
1885         switch (vif->type) {
1886         case NL80211_IFTYPE_STATION:
1887                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1888                 break;
1889         case NL80211_IFTYPE_AP:
1890         case NL80211_IFTYPE_ADHOC:
1891                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1892                 break;
1893         default:
1894                 /* shouldn't happen */
1895                 WARN_ON_ONCE(1);
1896         }
1897
1898         mutex_unlock(&mvm->mutex);
1899         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1900 }
1901
1902 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1903                                           enum iwl_scan_status scan_type)
1904 {
1905         int ret;
1906         bool wait_for_handlers = false;
1907
1908         mutex_lock(&mvm->mutex);
1909
1910         if (mvm->scan_status != scan_type) {
1911                 ret = 0;
1912                 /* make sure there are no pending notifications */
1913                 wait_for_handlers = true;
1914                 goto out;
1915         }
1916
1917         switch (scan_type) {
1918         case IWL_MVM_SCAN_SCHED:
1919                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1920                 break;
1921         case IWL_MVM_SCAN_OS:
1922                 ret = iwl_mvm_cancel_scan(mvm);
1923                 break;
1924         case IWL_MVM_SCAN_NONE:
1925         default:
1926                 WARN_ON_ONCE(1);
1927                 ret = -EINVAL;
1928                 break;
1929         }
1930         if (ret)
1931                 goto out;
1932
1933         wait_for_handlers = true;
1934 out:
1935         mutex_unlock(&mvm->mutex);
1936
1937         /* make sure we consume the completion notification */
1938         if (wait_for_handlers)
1939                 iwl_mvm_wait_for_async_handlers(mvm);
1940
1941         return ret;
1942 }
1943 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1944                                struct ieee80211_vif *vif,
1945                                struct ieee80211_scan_request *hw_req)
1946 {
1947         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1948         struct cfg80211_scan_request *req = &hw_req->req;
1949         int ret;
1950
1951         if (req->n_channels == 0 ||
1952             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1953                 return -EINVAL;
1954
1955         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1956                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1957                 if (ret)
1958                         return ret;
1959         }
1960
1961         mutex_lock(&mvm->mutex);
1962
1963         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1964                 ret = -EBUSY;
1965                 goto out;
1966         }
1967
1968         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1969
1970         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1971                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
1972         else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1973                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1974         else
1975                 ret = iwl_mvm_scan_request(mvm, vif, req);
1976
1977         if (ret)
1978                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1979 out:
1980         mutex_unlock(&mvm->mutex);
1981         return ret;
1982 }
1983
1984 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1985                                        struct ieee80211_vif *vif)
1986 {
1987         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1988
1989         mutex_lock(&mvm->mutex);
1990
1991         iwl_mvm_cancel_scan(mvm);
1992
1993         mutex_unlock(&mvm->mutex);
1994 }
1995
1996 static void
1997 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1998                                   struct ieee80211_sta *sta, u16 tids,
1999                                   int num_frames,
2000                                   enum ieee80211_frame_release_type reason,
2001                                   bool more_data)
2002 {
2003         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2004
2005         /* Called when we need to transmit (a) frame(s) from mac80211 */
2006
2007         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2008                                           tids, more_data, false);
2009 }
2010
2011 static void
2012 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2013                                     struct ieee80211_sta *sta, u16 tids,
2014                                     int num_frames,
2015                                     enum ieee80211_frame_release_type reason,
2016                                     bool more_data)
2017 {
2018         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2019
2020         /* Called when we need to transmit (a) frame(s) from agg queue */
2021
2022         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2023                                           tids, more_data, true);
2024 }
2025
2026 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2027                                    struct ieee80211_vif *vif,
2028                                    enum sta_notify_cmd cmd,
2029                                    struct ieee80211_sta *sta)
2030 {
2031         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2032         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2033         int tid;
2034
2035         switch (cmd) {
2036         case STA_NOTIFY_SLEEP:
2037                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2038                         ieee80211_sta_block_awake(hw, sta, true);
2039                 spin_lock_bh(&mvmsta->lock);
2040                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2041                         struct iwl_mvm_tid_data *tid_data;
2042
2043                         tid_data = &mvmsta->tid_data[tid];
2044                         if (tid_data->state != IWL_AGG_ON &&
2045                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2046                                 continue;
2047                         if (iwl_mvm_tid_queued(tid_data) == 0)
2048                                 continue;
2049                         ieee80211_sta_set_buffered(sta, tid, true);
2050                 }
2051                 spin_unlock_bh(&mvmsta->lock);
2052                 /*
2053                  * The fw updates the STA to be asleep. Tx packets on the Tx
2054                  * queues to this station will not be transmitted. The fw will
2055                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2056                  */
2057                 break;
2058         case STA_NOTIFY_AWAKE:
2059                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2060                         break;
2061                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2062                 break;
2063         default:
2064                 break;
2065         }
2066 }
2067
2068 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2069                                        struct ieee80211_vif *vif,
2070                                        struct ieee80211_sta *sta)
2071 {
2072         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2073         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2074
2075         /*
2076          * This is called before mac80211 does RCU synchronisation,
2077          * so here we already invalidate our internal RCU-protected
2078          * station pointer. The rest of the code will thus no longer
2079          * be able to find the station this way, and we don't rely
2080          * on further RCU synchronisation after the sta_state()
2081          * callback deleted the station.
2082          */
2083         mutex_lock(&mvm->mutex);
2084         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2085                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2086                                    ERR_PTR(-ENOENT));
2087         mutex_unlock(&mvm->mutex);
2088 }
2089
2090 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2091                                  struct ieee80211_vif *vif,
2092                                  struct ieee80211_sta *sta,
2093                                  enum ieee80211_sta_state old_state,
2094                                  enum ieee80211_sta_state new_state)
2095 {
2096         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2097         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2098         int ret;
2099
2100         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2101                            sta->addr, old_state, new_state);
2102
2103         /* this would be a mac80211 bug ... but don't crash */
2104         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2105                 return -EINVAL;
2106
2107         /* if a STA is being removed, reuse its ID */
2108         flush_work(&mvm->sta_drained_wk);
2109
2110         mutex_lock(&mvm->mutex);
2111         if (old_state == IEEE80211_STA_NOTEXIST &&
2112             new_state == IEEE80211_STA_NONE) {
2113                 /*
2114                  * Firmware bug - it'll crash if the beacon interval is less
2115                  * than 16. We can't avoid connecting at all, so refuse the
2116                  * station state change, this will cause mac80211 to abandon
2117                  * attempts to connect to this AP, and eventually wpa_s will
2118                  * blacklist the AP...
2119                  */
2120                 if (vif->type == NL80211_IFTYPE_STATION &&
2121                     vif->bss_conf.beacon_int < 16) {
2122                         IWL_ERR(mvm,
2123                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2124                                 sta->addr, vif->bss_conf.beacon_int);
2125                         ret = -EINVAL;
2126                         goto out_unlock;
2127                 }
2128
2129                 if (sta->tdls &&
2130                     (vif->p2p ||
2131                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2132                                                 IWL_MVM_TDLS_STA_COUNT ||
2133                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2134                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2135                         ret = -EBUSY;
2136                         goto out_unlock;
2137                 }
2138
2139                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2140                 if (sta->tdls && ret == 0)
2141                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2142         } else if (old_state == IEEE80211_STA_NONE &&
2143                    new_state == IEEE80211_STA_AUTH) {
2144                 /*
2145                  * EBS may be disabled due to previous failures reported by FW.
2146                  * Reset EBS status here assuming environment has been changed.
2147                  */
2148                 mvm->last_ebs_successful = true;
2149                 ret = 0;
2150         } else if (old_state == IEEE80211_STA_AUTH &&
2151                    new_state == IEEE80211_STA_ASSOC) {
2152                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2153                 if (ret == 0)
2154                         iwl_mvm_rs_rate_init(mvm, sta,
2155                                              mvmvif->phy_ctxt->channel->band,
2156                                              true);
2157         } else if (old_state == IEEE80211_STA_ASSOC &&
2158                    new_state == IEEE80211_STA_AUTHORIZED) {
2159
2160                 /* we don't support TDLS during DCM */
2161                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2162                         iwl_mvm_teardown_tdls_peers(mvm);
2163
2164                 /* enable beacon filtering */
2165                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2166                 ret = 0;
2167         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2168                    new_state == IEEE80211_STA_ASSOC) {
2169                 /* disable beacon filtering */
2170                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2171                 ret = 0;
2172         } else if (old_state == IEEE80211_STA_ASSOC &&
2173                    new_state == IEEE80211_STA_AUTH) {
2174                 ret = 0;
2175         } else if (old_state == IEEE80211_STA_AUTH &&
2176                    new_state == IEEE80211_STA_NONE) {
2177                 ret = 0;
2178         } else if (old_state == IEEE80211_STA_NONE &&
2179                    new_state == IEEE80211_STA_NOTEXIST) {
2180                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2181                 if (sta->tdls)
2182                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2183         } else {
2184                 ret = -EIO;
2185         }
2186  out_unlock:
2187         mutex_unlock(&mvm->mutex);
2188
2189         if (sta->tdls && ret == 0) {
2190                 if (old_state == IEEE80211_STA_NOTEXIST &&
2191                     new_state == IEEE80211_STA_NONE)
2192                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2193                 else if (old_state == IEEE80211_STA_NONE &&
2194                          new_state == IEEE80211_STA_NOTEXIST)
2195                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2196         }
2197
2198         return ret;
2199 }
2200
2201 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2202 {
2203         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2204
2205         mvm->rts_threshold = value;
2206
2207         return 0;
2208 }
2209
2210 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2211                                   struct ieee80211_vif *vif,
2212                                   struct ieee80211_sta *sta, u32 changed)
2213 {
2214         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2215
2216         if (vif->type == NL80211_IFTYPE_STATION &&
2217             changed & IEEE80211_RC_NSS_CHANGED)
2218                 iwl_mvm_sf_update(mvm, vif, false);
2219 }
2220
2221 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2222                                struct ieee80211_vif *vif, u16 ac,
2223                                const struct ieee80211_tx_queue_params *params)
2224 {
2225         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2226         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2227
2228         mvmvif->queue_params[ac] = *params;
2229
2230         /*
2231          * No need to update right away, we'll get BSS_CHANGED_QOS
2232          * The exception is P2P_DEVICE interface which needs immediate update.
2233          */
2234         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2235                 int ret;
2236
2237                 mutex_lock(&mvm->mutex);
2238                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2239                 mutex_unlock(&mvm->mutex);
2240                 return ret;
2241         }
2242         return 0;
2243 }
2244
2245 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2246                                       struct ieee80211_vif *vif)
2247 {
2248         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2249         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2250                            200 + vif->bss_conf.beacon_int);
2251         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2252                                100 + vif->bss_conf.beacon_int);
2253
2254         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2255                 return;
2256
2257         /*
2258          * iwl_mvm_protect_session() reads directly from the device
2259          * (the system time), so make sure it is available.
2260          */
2261         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2262                 return;
2263
2264         mutex_lock(&mvm->mutex);
2265         /* Try really hard to protect the session and hear a beacon */
2266         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2267         mutex_unlock(&mvm->mutex);
2268
2269         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2270 }
2271
2272 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2273                                         struct ieee80211_vif *vif,
2274                                         struct cfg80211_sched_scan_request *req,
2275                                         struct ieee80211_scan_ies *ies)
2276 {
2277         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2278         int ret;
2279
2280         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2281                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2282                 if (ret)
2283                         return ret;
2284         }
2285
2286         mutex_lock(&mvm->mutex);
2287
2288         /* Newest FW fixes sched scan while connected on another interface */
2289         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2290                 if (!vif->bss_conf.idle) {
2291                         ret = -EBUSY;
2292                         goto out;
2293                 }
2294         } else if (!iwl_mvm_is_idle(mvm)) {
2295                 ret = -EBUSY;
2296                 goto out;
2297         }
2298
2299         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2300                 ret = -EBUSY;
2301                 goto out;
2302         }
2303
2304         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2305         if (ret)
2306                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2307
2308 out:
2309         mutex_unlock(&mvm->mutex);
2310         return ret;
2311 }
2312
2313 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2314                                        struct ieee80211_vif *vif)
2315 {
2316         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2317         int ret;
2318
2319         mutex_lock(&mvm->mutex);
2320         ret = iwl_mvm_scan_offload_stop(mvm, false);
2321         mutex_unlock(&mvm->mutex);
2322         iwl_mvm_wait_for_async_handlers(mvm);
2323
2324         return ret;
2325
2326 }
2327
2328 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2329                                enum set_key_cmd cmd,
2330                                struct ieee80211_vif *vif,
2331                                struct ieee80211_sta *sta,
2332                                struct ieee80211_key_conf *key)
2333 {
2334         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2335         int ret;
2336
2337         if (iwlwifi_mod_params.sw_crypto) {
2338                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2339                 return -EOPNOTSUPP;
2340         }
2341
2342         switch (key->cipher) {
2343         case WLAN_CIPHER_SUITE_TKIP:
2344                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2345                 /* fall-through */
2346         case WLAN_CIPHER_SUITE_CCMP:
2347                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2348                 break;
2349         case WLAN_CIPHER_SUITE_AES_CMAC:
2350                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2351                 break;
2352         case WLAN_CIPHER_SUITE_WEP40:
2353         case WLAN_CIPHER_SUITE_WEP104:
2354                 /* For non-client mode, only use WEP keys for TX as we probably
2355                  * don't have a station yet anyway and would then have to keep
2356                  * track of the keys, linking them to each of the clients/peers
2357                  * as they appear. For now, don't do that, for performance WEP
2358                  * offload doesn't really matter much, but we need it for some
2359                  * other offload features in client mode.
2360                  */
2361                 if (vif->type != NL80211_IFTYPE_STATION)
2362                         return 0;
2363                 break;
2364         default:
2365                 /* currently FW supports only one optional cipher scheme */
2366                 if (hw->n_cipher_schemes &&
2367                     hw->cipher_schemes->cipher == key->cipher)
2368                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2369                 else
2370                         return -EOPNOTSUPP;
2371         }
2372
2373         mutex_lock(&mvm->mutex);
2374
2375         switch (cmd) {
2376         case SET_KEY:
2377                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2378                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2379                         /*
2380                          * GTK on AP interface is a TX-only key, return 0;
2381                          * on IBSS they're per-station and because we're lazy
2382                          * we don't support them for RX, so do the same.
2383                          */
2384                         ret = 0;
2385                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2386                         break;
2387                 }
2388
2389                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2390                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2391                 if (ret) {
2392                         IWL_WARN(mvm, "set key failed\n");
2393                         /*
2394                          * can't add key for RX, but we don't need it
2395                          * in the device for TX so still return 0
2396                          */
2397                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2398                         ret = 0;
2399                 }
2400
2401                 break;
2402         case DISABLE_KEY:
2403                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2404                         ret = 0;
2405                         break;
2406                 }
2407
2408                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2409                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2410                 break;
2411         default:
2412                 ret = -EINVAL;
2413         }
2414
2415         mutex_unlock(&mvm->mutex);
2416         return ret;
2417 }
2418
2419 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2420                                         struct ieee80211_vif *vif,
2421                                         struct ieee80211_key_conf *keyconf,
2422                                         struct ieee80211_sta *sta,
2423                                         u32 iv32, u16 *phase1key)
2424 {
2425         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2426
2427         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2428                 return;
2429
2430         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2431 }
2432
2433
2434 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2435                                struct iwl_rx_packet *pkt, void *data)
2436 {
2437         struct iwl_mvm *mvm =
2438                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2439         struct iwl_hs20_roc_res *resp;
2440         int resp_len = iwl_rx_packet_payload_len(pkt);
2441         struct iwl_mvm_time_event_data *te_data = data;
2442
2443         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2444                 return true;
2445
2446         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2447                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2448                 return true;
2449         }
2450
2451         resp = (void *)pkt->data;
2452
2453         IWL_DEBUG_TE(mvm,
2454                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2455                      resp->status, resp->event_unique_id);
2456
2457         te_data->uid = le32_to_cpu(resp->event_unique_id);
2458         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2459                      te_data->uid);
2460
2461         spin_lock_bh(&mvm->time_event_lock);
2462         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2463         spin_unlock_bh(&mvm->time_event_lock);
2464
2465         return true;
2466 }
2467
2468 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2469 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2470                                     struct ieee80211_channel *channel,
2471                                     struct ieee80211_vif *vif,
2472                                     int duration)
2473 {
2474         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2475         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2476         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2477         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2478         struct iwl_notification_wait wait_time_event;
2479         struct iwl_hs20_roc_req aux_roc_req = {
2480                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2481                 .id_and_color =
2482                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2483                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2484                 /* Set the channel info data */
2485                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2486                         PHY_BAND_24 : PHY_BAND_5,
2487                 .channel_info.channel = channel->hw_value,
2488                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2489                 /* Set the time and duration */
2490                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2491                 .apply_time_max_delay =
2492                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2493                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2494          };
2495
2496         /* Set the node address */
2497         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2498
2499         lockdep_assert_held(&mvm->mutex);
2500
2501         spin_lock_bh(&mvm->time_event_lock);
2502
2503         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2504                 spin_unlock_bh(&mvm->time_event_lock);
2505                 return -EIO;
2506         }
2507
2508         te_data->vif = vif;
2509         te_data->duration = duration;
2510         te_data->id = HOT_SPOT_CMD;
2511
2512         spin_unlock_bh(&mvm->time_event_lock);
2513
2514         /*
2515          * Use a notification wait, which really just processes the
2516          * command response and doesn't wait for anything, in order
2517          * to be able to process the response and get the UID inside
2518          * the RX path. Using CMD_WANT_SKB doesn't work because it
2519          * stores the buffer and then wakes up this thread, by which
2520          * time another notification (that the time event started)
2521          * might already be processed unsuccessfully.
2522          */
2523         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2524                                    time_event_response,
2525                                    ARRAY_SIZE(time_event_response),
2526                                    iwl_mvm_rx_aux_roc, te_data);
2527
2528         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2529                                    &aux_roc_req);
2530
2531         if (res) {
2532                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2533                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2534                 goto out_clear_te;
2535         }
2536
2537         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2538         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2539         /* should never fail */
2540         WARN_ON_ONCE(res);
2541
2542         if (res) {
2543  out_clear_te:
2544                 spin_lock_bh(&mvm->time_event_lock);
2545                 iwl_mvm_te_clear_data(mvm, te_data);
2546                 spin_unlock_bh(&mvm->time_event_lock);
2547         }
2548
2549         return res;
2550 }
2551
2552 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2553                        struct ieee80211_vif *vif,
2554                        struct ieee80211_channel *channel,
2555                        int duration,
2556                        enum ieee80211_roc_type type)
2557 {
2558         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2559         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2560         struct cfg80211_chan_def chandef;
2561         struct iwl_mvm_phy_ctxt *phy_ctxt;
2562         int ret, i;
2563
2564         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2565                            duration, type);
2566
2567         mutex_lock(&mvm->mutex);
2568
2569         switch (vif->type) {
2570         case NL80211_IFTYPE_STATION:
2571                 /* Use aux roc framework (HS20) */
2572                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2573                                                vif, duration);
2574                 goto out_unlock;
2575         case NL80211_IFTYPE_P2P_DEVICE:
2576                 /* handle below */
2577                 break;
2578         default:
2579                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2580                 ret = -EINVAL;
2581                 goto out_unlock;
2582         }
2583
2584         for (i = 0; i < NUM_PHY_CTX; i++) {
2585                 phy_ctxt = &mvm->phy_ctxts[i];
2586                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2587                         continue;
2588
2589                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2590                         /*
2591                          * Unbind the P2P_DEVICE from the current PHY context,
2592                          * and if the PHY context is not used remove it.
2593                          */
2594                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2595                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2596                                 goto out_unlock;
2597
2598                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2599
2600                         /* Bind the P2P_DEVICE to the current PHY Context */
2601                         mvmvif->phy_ctxt = phy_ctxt;
2602
2603                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2604                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2605                                 goto out_unlock;
2606
2607                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2608                         goto schedule_time_event;
2609                 }
2610         }
2611
2612         /* Need to update the PHY context only if the ROC channel changed */
2613         if (channel == mvmvif->phy_ctxt->channel)
2614                 goto schedule_time_event;
2615
2616         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2617
2618         /*
2619          * Change the PHY context configuration as it is currently referenced
2620          * only by the P2P Device MAC
2621          */
2622         if (mvmvif->phy_ctxt->ref == 1) {
2623                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2624                                                &chandef, 1, 1);
2625                 if (ret)
2626                         goto out_unlock;
2627         } else {
2628                 /*
2629                  * The PHY context is shared with other MACs. Need to remove the
2630                  * P2P Device from the binding, allocate an new PHY context and
2631                  * create a new binding
2632                  */
2633                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2634                 if (!phy_ctxt) {
2635                         ret = -ENOSPC;
2636                         goto out_unlock;
2637                 }
2638
2639                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2640                                                1, 1);
2641                 if (ret) {
2642                         IWL_ERR(mvm, "Failed to change PHY context\n");
2643                         goto out_unlock;
2644                 }
2645
2646                 /* Unbind the P2P_DEVICE from the current PHY context */
2647                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2648                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2649                         goto out_unlock;
2650
2651                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2652
2653                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2654                 mvmvif->phy_ctxt = phy_ctxt;
2655
2656                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2657                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2658                         goto out_unlock;
2659
2660                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2661         }
2662
2663 schedule_time_event:
2664         /* Schedule the time events */
2665         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2666
2667 out_unlock:
2668         mutex_unlock(&mvm->mutex);
2669         IWL_DEBUG_MAC80211(mvm, "leave\n");
2670         return ret;
2671 }
2672
2673 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2674 {
2675         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2676
2677         IWL_DEBUG_MAC80211(mvm, "enter\n");
2678
2679         mutex_lock(&mvm->mutex);
2680         iwl_mvm_stop_roc(mvm);
2681         mutex_unlock(&mvm->mutex);
2682
2683         IWL_DEBUG_MAC80211(mvm, "leave\n");
2684         return 0;
2685 }
2686
2687 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2688                                  struct ieee80211_chanctx_conf *ctx)
2689 {
2690         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2691         struct iwl_mvm_phy_ctxt *phy_ctxt;
2692         int ret;
2693
2694         lockdep_assert_held(&mvm->mutex);
2695
2696         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2697
2698         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2699         if (!phy_ctxt) {
2700                 ret = -ENOSPC;
2701                 goto out;
2702         }
2703
2704         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2705                                        ctx->rx_chains_static,
2706                                        ctx->rx_chains_dynamic);
2707         if (ret) {
2708                 IWL_ERR(mvm, "Failed to add PHY context\n");
2709                 goto out;
2710         }
2711
2712         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2713         *phy_ctxt_id = phy_ctxt->id;
2714 out:
2715         return ret;
2716 }
2717
2718 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2719                                struct ieee80211_chanctx_conf *ctx)
2720 {
2721         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2722         int ret;
2723
2724         mutex_lock(&mvm->mutex);
2725         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2726         mutex_unlock(&mvm->mutex);
2727
2728         return ret;
2729 }
2730
2731 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2732                                      struct ieee80211_chanctx_conf *ctx)
2733 {
2734         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2735         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2736
2737         lockdep_assert_held(&mvm->mutex);
2738
2739         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2740 }
2741
2742 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2743                                    struct ieee80211_chanctx_conf *ctx)
2744 {
2745         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2746
2747         mutex_lock(&mvm->mutex);
2748         __iwl_mvm_remove_chanctx(mvm, ctx);
2749         mutex_unlock(&mvm->mutex);
2750 }
2751
2752 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2753                                    struct ieee80211_chanctx_conf *ctx,
2754                                    u32 changed)
2755 {
2756         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2757         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2758         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2759
2760         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2761                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2762                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2763                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2764                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2765                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2766                       phy_ctxt->ref, changed))
2767                 return;
2768
2769         mutex_lock(&mvm->mutex);
2770         iwl_mvm_bt_coex_vif_change(mvm);
2771         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2772                                  ctx->rx_chains_static,
2773                                  ctx->rx_chains_dynamic);
2774         mutex_unlock(&mvm->mutex);
2775 }
2776
2777 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2778                                         struct ieee80211_vif *vif,
2779                                         struct ieee80211_chanctx_conf *ctx,
2780                                         bool switching_chanctx)
2781 {
2782         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2783         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2784         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2785         int ret;
2786
2787         lockdep_assert_held(&mvm->mutex);
2788
2789         mvmvif->phy_ctxt = phy_ctxt;
2790
2791         switch (vif->type) {
2792         case NL80211_IFTYPE_AP:
2793                 /* Unless it's a CSA flow we have nothing to do here */
2794                 if (vif->csa_active) {
2795                         mvmvif->ap_ibss_active = true;
2796                         break;
2797                 }
2798         case NL80211_IFTYPE_ADHOC:
2799                 /*
2800                  * The AP binding flow is handled as part of the start_ap flow
2801                  * (in bss_info_changed), similarly for IBSS.
2802                  */
2803                 ret = 0;
2804                 goto out;
2805         case NL80211_IFTYPE_STATION:
2806                 break;
2807         case NL80211_IFTYPE_MONITOR:
2808                 /* always disable PS when a monitor interface is active */
2809                 mvmvif->ps_disabled = true;
2810                 break;
2811         default:
2812                 ret = -EINVAL;
2813                 goto out;
2814         }
2815
2816         ret = iwl_mvm_binding_add_vif(mvm, vif);
2817         if (ret)
2818                 goto out;
2819
2820         /*
2821          * Power state must be updated before quotas,
2822          * otherwise fw will complain.
2823          */
2824         iwl_mvm_power_update_mac(mvm);
2825
2826         /* Setting the quota at this stage is only required for monitor
2827          * interfaces. For the other types, the bss_info changed flow
2828          * will handle quota settings.
2829          */
2830         if (vif->type == NL80211_IFTYPE_MONITOR) {
2831                 mvmvif->monitor_active = true;
2832                 ret = iwl_mvm_update_quotas(mvm, NULL);
2833                 if (ret)
2834                         goto out_remove_binding;
2835         }
2836
2837         /* Handle binding during CSA */
2838         if ((vif->type == NL80211_IFTYPE_AP) ||
2839             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2840                 iwl_mvm_update_quotas(mvm, NULL);
2841                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2842         }
2843
2844         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2845                 struct iwl_mvm_sta *mvmsta;
2846
2847                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2848                                                           mvmvif->ap_sta_id);
2849
2850                 if (WARN_ON(!mvmsta))
2851                         goto out;
2852
2853                 /* TODO: only re-enable after the first beacon */
2854                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2855         }
2856
2857         goto out;
2858
2859 out_remove_binding:
2860         iwl_mvm_binding_remove_vif(mvm, vif);
2861         iwl_mvm_power_update_mac(mvm);
2862 out:
2863         if (ret)
2864                 mvmvif->phy_ctxt = NULL;
2865         return ret;
2866 }
2867 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2868                                       struct ieee80211_vif *vif,
2869                                       struct ieee80211_chanctx_conf *ctx)
2870 {
2871         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2872         int ret;
2873
2874         mutex_lock(&mvm->mutex);
2875         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2876         mutex_unlock(&mvm->mutex);
2877
2878         return ret;
2879 }
2880
2881 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2882                                            struct ieee80211_vif *vif,
2883                                            struct ieee80211_chanctx_conf *ctx,
2884                                            bool switching_chanctx)
2885 {
2886         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2887         struct ieee80211_vif *disabled_vif = NULL;
2888         struct iwl_mvm_sta *mvmsta;
2889
2890         lockdep_assert_held(&mvm->mutex);
2891
2892         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2893
2894         switch (vif->type) {
2895         case NL80211_IFTYPE_ADHOC:
2896                 goto out;
2897         case NL80211_IFTYPE_MONITOR:
2898                 mvmvif->monitor_active = false;
2899                 mvmvif->ps_disabled = false;
2900                 break;
2901         case NL80211_IFTYPE_AP:
2902                 /* This part is triggered only during CSA */
2903                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2904                         goto out;
2905
2906                 /* Set CS bit on all the stations */
2907                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2908
2909                 /* Save blocked iface, the timeout is set on the next beacon */
2910                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2911
2912                 mvmvif->ap_ibss_active = false;
2913                 break;
2914         case NL80211_IFTYPE_STATION:
2915                 if (!switching_chanctx)
2916                         break;
2917
2918                 disabled_vif = vif;
2919
2920                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2921                                                           mvmvif->ap_sta_id);
2922
2923                 if (!WARN_ON(!mvmsta))
2924                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2925
2926                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2927                 break;
2928         default:
2929                 break;
2930         }
2931
2932         iwl_mvm_update_quotas(mvm, disabled_vif);
2933         iwl_mvm_binding_remove_vif(mvm, vif);
2934
2935 out:
2936         mvmvif->phy_ctxt = NULL;
2937         iwl_mvm_power_update_mac(mvm);
2938 }
2939
2940 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2941                                          struct ieee80211_vif *vif,
2942                                          struct ieee80211_chanctx_conf *ctx)
2943 {
2944         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2945
2946         mutex_lock(&mvm->mutex);
2947         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2948         mutex_unlock(&mvm->mutex);
2949 }
2950
2951 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2952                                       struct ieee80211_vif_chanctx_switch *vifs,
2953                                       int n_vifs,
2954                                       enum ieee80211_chanctx_switch_mode mode)
2955 {
2956         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2957         int ret;
2958
2959         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2960         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2961                 return -EOPNOTSUPP;
2962
2963         mutex_lock(&mvm->mutex);
2964         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2965         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2966
2967         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2968         if (ret) {
2969                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2970                 goto out_reassign;
2971         }
2972
2973         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2974                                            true);
2975         if (ret) {
2976                 IWL_ERR(mvm,
2977                         "failed to assign new_ctx during channel switch\n");
2978                 goto out_remove;
2979         }
2980
2981         /* we don't support TDLS during DCM - can be caused by channel switch */
2982         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2983                 iwl_mvm_teardown_tdls_peers(mvm);
2984
2985         goto out;
2986
2987 out_remove:
2988         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2989
2990 out_reassign:
2991         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2992         if (ret) {
2993                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2994                 goto out_restart;
2995         }
2996
2997         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2998                                            true);
2999         if (ret) {
3000                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3001                 goto out_restart;
3002         }
3003
3004         goto out;
3005
3006 out_restart:
3007         /* things keep failing, better restart the hw */
3008         iwl_mvm_nic_restart(mvm, false);
3009
3010 out:
3011         mutex_unlock(&mvm->mutex);
3012         return ret;
3013 }
3014
3015 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3016                            struct ieee80211_sta *sta,
3017                            bool set)
3018 {
3019         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3020         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
3021
3022         if (!mvm_sta || !mvm_sta->vif) {
3023                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3024                 return -EINVAL;
3025         }
3026
3027         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3028 }
3029
3030 #ifdef CONFIG_NL80211_TESTMODE
3031 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3032         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3033         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3034         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3035 };
3036
3037 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3038                                       struct ieee80211_vif *vif,
3039                                       void *data, int len)
3040 {
3041         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3042         int err;
3043         u32 noa_duration;
3044
3045         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3046         if (err)
3047                 return err;
3048
3049         if (!tb[IWL_MVM_TM_ATTR_CMD])
3050                 return -EINVAL;
3051
3052         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3053         case IWL_MVM_TM_CMD_SET_NOA:
3054                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3055                     !vif->bss_conf.enable_beacon ||
3056                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3057                         return -EINVAL;
3058
3059                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3060                 if (noa_duration >= vif->bss_conf.beacon_int)
3061                         return -EINVAL;
3062
3063                 mvm->noa_duration = noa_duration;
3064                 mvm->noa_vif = vif;
3065
3066                 return iwl_mvm_update_quotas(mvm, NULL);
3067         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3068                 /* must be associated client vif - ignore authorized */
3069                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3070                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3071                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3072                         return -EINVAL;
3073
3074                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3075                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3076                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3077         }
3078
3079         return -EOPNOTSUPP;
3080 }
3081
3082 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3083                                     struct ieee80211_vif *vif,
3084                                     void *data, int len)
3085 {
3086         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3087         int err;
3088
3089         mutex_lock(&mvm->mutex);
3090         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3091         mutex_unlock(&mvm->mutex);
3092
3093         return err;
3094 }
3095 #endif
3096
3097 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3098                                           struct ieee80211_vif *vif,
3099                                           struct cfg80211_chan_def *chandef)
3100 {
3101         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3102         struct ieee80211_vif *csa_vif;
3103
3104         mutex_lock(&mvm->mutex);
3105
3106         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3107                                             lockdep_is_held(&mvm->mutex));
3108         if (WARN(csa_vif && csa_vif->csa_active,
3109                  "Another CSA is already in progress"))
3110                 goto out_unlock;
3111
3112         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3113                            chandef->center_freq1);
3114         rcu_assign_pointer(mvm->csa_vif, vif);
3115
3116 out_unlock:
3117         mutex_unlock(&mvm->mutex);
3118 }
3119
3120 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3121                               struct ieee80211_vif *vif, u32 queues, bool drop)
3122 {
3123         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3124         struct iwl_mvm_vif *mvmvif;
3125         struct iwl_mvm_sta *mvmsta;
3126         struct ieee80211_sta *sta;
3127         int i;
3128         u32 msk = 0;
3129
3130         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3131                 return;
3132
3133         mutex_lock(&mvm->mutex);
3134         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3135
3136         /* flush the AP-station and all TDLS peers */
3137         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3138                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3139                                                 lockdep_is_held(&mvm->mutex));
3140                 if (IS_ERR_OR_NULL(sta))
3141                         continue;
3142
3143                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3144                 if (mvmsta->vif != vif)
3145                         continue;
3146
3147                 /* make sure only TDLS peers or the AP are flushed */
3148                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3149
3150                 msk |= mvmsta->tfd_queue_msk;
3151         }
3152
3153         if (drop) {
3154                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3155                         IWL_ERR(mvm, "flush request fail\n");
3156                 mutex_unlock(&mvm->mutex);
3157         } else {
3158                 mutex_unlock(&mvm->mutex);
3159
3160                 /* this can take a while, and we may need/want other operations
3161                  * to succeed while doing this, so do it without the mutex held
3162                  */
3163                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3164         }
3165 }
3166
3167 const struct ieee80211_ops iwl_mvm_hw_ops = {
3168         .tx = iwl_mvm_mac_tx,
3169         .ampdu_action = iwl_mvm_mac_ampdu_action,
3170         .start = iwl_mvm_mac_start,
3171         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3172         .stop = iwl_mvm_mac_stop,
3173         .add_interface = iwl_mvm_mac_add_interface,
3174         .remove_interface = iwl_mvm_mac_remove_interface,
3175         .config = iwl_mvm_mac_config,
3176         .prepare_multicast = iwl_mvm_prepare_multicast,
3177         .configure_filter = iwl_mvm_configure_filter,
3178         .bss_info_changed = iwl_mvm_bss_info_changed,
3179         .hw_scan = iwl_mvm_mac_hw_scan,
3180         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3181         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3182         .sta_state = iwl_mvm_mac_sta_state,
3183         .sta_notify = iwl_mvm_mac_sta_notify,
3184         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3185         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3186         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3187         .sta_rc_update = iwl_mvm_sta_rc_update,
3188         .conf_tx = iwl_mvm_mac_conf_tx,
3189         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3190         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3191         .flush = iwl_mvm_mac_flush,
3192         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3193         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3194         .set_key = iwl_mvm_mac_set_key,
3195         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3196         .remain_on_channel = iwl_mvm_roc,
3197         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3198         .add_chanctx = iwl_mvm_add_chanctx,
3199         .remove_chanctx = iwl_mvm_remove_chanctx,
3200         .change_chanctx = iwl_mvm_change_chanctx,
3201         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3202         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3203         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3204
3205         .start_ap = iwl_mvm_start_ap_ibss,
3206         .stop_ap = iwl_mvm_stop_ap_ibss,
3207         .join_ibss = iwl_mvm_start_ap_ibss,
3208         .leave_ibss = iwl_mvm_stop_ap_ibss,
3209
3210         .set_tim = iwl_mvm_set_tim,
3211
3212         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3213
3214         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3215
3216 #ifdef CONFIG_PM_SLEEP
3217         /* look at d3.c */
3218         .suspend = iwl_mvm_suspend,
3219         .resume = iwl_mvm_resume,
3220         .set_wakeup = iwl_mvm_set_wakeup,
3221         .set_rekey_data = iwl_mvm_set_rekey_data,
3222 #if IS_ENABLED(CONFIG_IPV6)
3223         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3224 #endif
3225         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3226 #endif
3227 };