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->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 880         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 881         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 882         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 883         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 884         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 885
 886         ieee80211_wake_queues(mvm->hw);
 887
 888         /* cleanup all stale references (scan, roc), but keep the
 889          * ucode_down ref until reconfig is complete */
 890         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 891
 892         /* clear any stale d0i3 state */
 893         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 894
 895         mvm->vif_count = 0;
 896         mvm->rx_ba_sessions = 0;
 897 }
 898
 899 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 900 {
 901         int ret;
 902
 903         lockdep_assert_held(&mvm->mutex);
 904
 905         /* Clean up some internal and mac80211 state on restart */
 906         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 907                 iwl_mvm_restart_cleanup(mvm);
 908
 909         ret = iwl_mvm_up(mvm);
 910
 911         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 912                 /* Something went wrong - we need to finish some cleanup
 913                  * that normally iwl_mvm_mac_restart_complete() below
 914                  * would do.
 915                  */
 916                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 917                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 918         }
 919
 920         return ret;
 921 }
 922
 923 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 924 {
 925         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 926         int ret;
 927
 928         mutex_lock(&mvm->mutex);
 929         ret = __iwl_mvm_mac_start(mvm);
 930         mutex_unlock(&mvm->mutex);
 931
 932         return ret;
 933 }
 934
 935 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
 936 {
 937         int ret;
 938
 939         mutex_lock(&mvm->mutex);
 940
 941         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 942         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 943         ret = iwl_mvm_update_quotas(mvm, NULL);
 944         if (ret)
 945                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 946                         ret);
 947
 948         /* allow transport/FW low power modes */
 949         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 950
 951         mutex_unlock(&mvm->mutex);
 952 }
 953
 954 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
 955 {
 956         bool exit_now;
 957
 958         if (!iwl_mvm_is_d0i3_supported(mvm))
 959                 return;
 960
 961         mutex_lock(&mvm->d0i3_suspend_mutex);
 962         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
 963         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
 964                                         &mvm->d0i3_suspend_flags);
 965         mutex_unlock(&mvm->d0i3_suspend_mutex);
 966
 967         if (exit_now) {
 968                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
 969                 _iwl_mvm_exit_d0i3(mvm);
 970         }
 971 }
 972
 973 static void
 974 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
 975                               enum ieee80211_reconfig_type reconfig_type)
 976 {
 977         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 978
 979         switch (reconfig_type) {
 980         case IEEE80211_RECONFIG_TYPE_RESTART:
 981                 iwl_mvm_restart_complete(mvm);
 982                 break;
 983         case IEEE80211_RECONFIG_TYPE_SUSPEND:
 984                 iwl_mvm_resume_complete(mvm);
 985                 break;
 986         }
 987 }
 988
 989 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 990 {
 991         lockdep_assert_held(&mvm->mutex);
 992
 993         /* disallow low power states when the FW is down */
 994         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 995
 996         /* async_handlers_wk is now blocked */
 997
 998         /*
 999          * The work item could be running or queued if the
1000          * ROC time event stops just as we get here.
1001          */
1002         cancel_work_sync(&mvm->roc_done_wk);
1003
1004         iwl_trans_stop_device(mvm->trans);
1005
1006         iwl_mvm_async_handlers_purge(mvm);
1007         /* async_handlers_list is empty and will stay empty: HW is stopped */
1008
1009         /* the fw is stopped, the aux sta is dead: clean up driver state */
1010         iwl_mvm_del_aux_sta(mvm);
1011
1012         mvm->ucode_loaded = false;
1013 }
1014
1015 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1016 {
1017         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1018
1019         flush_work(&mvm->d0i3_exit_work);
1020         flush_work(&mvm->async_handlers_wk);
1021         flush_work(&mvm->fw_error_dump_wk);
1022
1023         mutex_lock(&mvm->mutex);
1024         __iwl_mvm_mac_stop(mvm);
1025         mutex_unlock(&mvm->mutex);
1026
1027         /*
1028          * The worker might have been waiting for the mutex, let it run and
1029          * discover that its list is now empty.
1030          */
1031         cancel_work_sync(&mvm->async_handlers_wk);
1032 }
1033
1034 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1035 {
1036         u16 i;
1037
1038         lockdep_assert_held(&mvm->mutex);
1039
1040         for (i = 0; i < NUM_PHY_CTX; i++)
1041                 if (!mvm->phy_ctxts[i].ref)
1042                         return &mvm->phy_ctxts[i];
1043
1044         IWL_ERR(mvm, "No available PHY context\n");
1045         return NULL;
1046 }
1047
1048 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1049                                 s8 tx_power)
1050 {
1051         /* FW is in charge of regulatory enforcement */
1052         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1053                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1054                 .pwr_restriction = cpu_to_le16(tx_power),
1055         };
1056
1057         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1058                                     sizeof(reduce_txpwr_cmd),
1059                                     &reduce_txpwr_cmd);
1060 }
1061
1062 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1063                                      struct ieee80211_vif *vif)
1064 {
1065         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1066         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1067         int ret;
1068
1069         /*
1070          * make sure D0i3 exit is completed, otherwise a target access
1071          * during tx queue configuration could be done when still in
1072          * D0i3 state.
1073          */
1074         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1075         if (ret)
1076                 return ret;
1077
1078         /*
1079          * Not much to do here. The stack will not allow interface
1080          * types or combinations that we didn't advertise, so we
1081          * don't really have to check the types.
1082          */
1083
1084         mutex_lock(&mvm->mutex);
1085
1086         /* Allocate resources for the MAC context, and add it to the fw  */
1087         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1088         if (ret)
1089                 goto out_unlock;
1090
1091         /* Counting number of interfaces is needed for legacy PM */
1092         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1093                 mvm->vif_count++;
1094
1095         /*
1096          * The AP binding flow can be done only after the beacon
1097          * template is configured (which happens only in the mac80211
1098          * start_ap() flow), and adding the broadcast station can happen
1099          * only after the binding.
1100          * In addition, since modifying the MAC before adding a bcast
1101          * station is not allowed by the FW, delay the adding of MAC context to
1102          * the point where we can also add the bcast station.
1103          * In short: there's not much we can do at this point, other than
1104          * allocating resources :)
1105          */
1106         if (vif->type == NL80211_IFTYPE_AP ||
1107             vif->type == NL80211_IFTYPE_ADHOC) {
1108                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1109                 if (ret) {
1110                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1111                         goto out_release;
1112                 }
1113
1114                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1115                 goto out_unlock;
1116         }
1117
1118         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1119         if (ret)
1120                 goto out_release;
1121
1122         ret = iwl_mvm_power_update_mac(mvm);
1123         if (ret)
1124                 goto out_release;
1125
1126         /* beacon filtering */
1127         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1128         if (ret)
1129                 goto out_remove_mac;
1130
1131         if (!mvm->bf_allowed_vif &&
1132             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1133                 mvm->bf_allowed_vif = mvmvif;
1134                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1135                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1136         }
1137
1138         /*
1139          * P2P_DEVICE interface does not have a channel context assigned to it,
1140          * so a dedicated PHY context is allocated to it and the corresponding
1141          * MAC context is bound to it at this stage.
1142          */
1143         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1144
1145                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1146                 if (!mvmvif->phy_ctxt) {
1147                         ret = -ENOSPC;
1148                         goto out_free_bf;
1149                 }
1150
1151                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1152                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1153                 if (ret)
1154                         goto out_unref_phy;
1155
1156                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1157                 if (ret)
1158                         goto out_unbind;
1159
1160                 /* Save a pointer to p2p device vif, so it can later be used to
1161                  * update the p2p device MAC when a GO is started/stopped */
1162                 mvm->p2p_device_vif = vif;
1163         }
1164
1165         iwl_mvm_vif_dbgfs_register(mvm, vif);
1166         goto out_unlock;
1167
1168  out_unbind:
1169         iwl_mvm_binding_remove_vif(mvm, vif);
1170  out_unref_phy:
1171         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1172  out_free_bf:
1173         if (mvm->bf_allowed_vif == mvmvif) {
1174                 mvm->bf_allowed_vif = NULL;
1175                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1176                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1177         }
1178  out_remove_mac:
1179         mvmvif->phy_ctxt = NULL;
1180         iwl_mvm_mac_ctxt_remove(mvm, vif);
1181  out_release:
1182         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1183                 mvm->vif_count--;
1184
1185         iwl_mvm_mac_ctxt_release(mvm, vif);
1186  out_unlock:
1187         mutex_unlock(&mvm->mutex);
1188
1189         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1190
1191         return ret;
1192 }
1193
1194 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1195                                         struct ieee80211_vif *vif)
1196 {
1197         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1198
1199         if (tfd_msk) {
1200                 mutex_lock(&mvm->mutex);
1201                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1202                 mutex_unlock(&mvm->mutex);
1203         }
1204
1205         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1206                 /*
1207                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1208                  * We assume here that all the packets sent to the OFFCHANNEL
1209                  * queue are sent in ROC session.
1210                  */
1211                 flush_work(&mvm->roc_done_wk);
1212         } else {
1213                 /*
1214                  * By now, all the AC queues are empty. The AGG queues are
1215                  * empty too. We already got all the Tx responses for all the
1216                  * packets in the queues. The drain work can have been
1217                  * triggered. Flush it.
1218                  */
1219                 flush_work(&mvm->sta_drained_wk);
1220         }
1221 }
1222
1223 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1224                                          struct ieee80211_vif *vif)
1225 {
1226         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1227         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1228
1229         iwl_mvm_prepare_mac_removal(mvm, vif);
1230
1231         mutex_lock(&mvm->mutex);
1232
1233         if (mvm->bf_allowed_vif == mvmvif) {
1234                 mvm->bf_allowed_vif = NULL;
1235                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1236                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1237         }
1238
1239         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1240
1241         /*
1242          * For AP/GO interface, the tear down of the resources allocated to the
1243          * interface is be handled as part of the stop_ap flow.
1244          */
1245         if (vif->type == NL80211_IFTYPE_AP ||
1246             vif->type == NL80211_IFTYPE_ADHOC) {
1247 #ifdef CONFIG_NL80211_TESTMODE
1248                 if (vif == mvm->noa_vif) {
1249                         mvm->noa_vif = NULL;
1250                         mvm->noa_duration = 0;
1251                 }
1252 #endif
1253                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1254                 goto out_release;
1255         }
1256
1257         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1258                 mvm->p2p_device_vif = NULL;
1259                 iwl_mvm_rm_bcast_sta(mvm, vif);
1260                 iwl_mvm_binding_remove_vif(mvm, vif);
1261                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1262                 mvmvif->phy_ctxt = NULL;
1263         }
1264
1265         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1266                 mvm->vif_count--;
1267
1268         iwl_mvm_power_update_mac(mvm);
1269         iwl_mvm_mac_ctxt_remove(mvm, vif);
1270
1271 out_release:
1272         iwl_mvm_mac_ctxt_release(mvm, vif);
1273         mutex_unlock(&mvm->mutex);
1274 }
1275
1276 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1277 {
1278         return 0;
1279 }
1280
1281 struct iwl_mvm_mc_iter_data {
1282         struct iwl_mvm *mvm;
1283         int port_id;
1284 };
1285
1286 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1287                                       struct ieee80211_vif *vif)
1288 {
1289         struct iwl_mvm_mc_iter_data *data = _data;
1290         struct iwl_mvm *mvm = data->mvm;
1291         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1292         int ret, len;
1293
1294         /* if we don't have free ports, mcast frames will be dropped */
1295         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1296                 return;
1297
1298         if (vif->type != NL80211_IFTYPE_STATION ||
1299             !vif->bss_conf.assoc)
1300                 return;
1301
1302         cmd->port_id = data->port_id++;
1303         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1304         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1305
1306         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1307         if (ret)
1308                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1309 }
1310
1311 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1312 {
1313         struct iwl_mvm_mc_iter_data iter_data = {
1314                 .mvm = mvm,
1315         };
1316
1317         lockdep_assert_held(&mvm->mutex);
1318
1319         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1320                 return;
1321
1322         ieee80211_iterate_active_interfaces_atomic(
1323                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1324                 iwl_mvm_mc_iface_iterator, &iter_data);
1325 }
1326
1327 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1328                                      struct netdev_hw_addr_list *mc_list)
1329 {
1330         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1331         struct iwl_mcast_filter_cmd *cmd;
1332         struct netdev_hw_addr *addr;
1333         int addr_count;
1334         bool pass_all;
1335         int len;
1336
1337         addr_count = netdev_hw_addr_list_count(mc_list);
1338         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1339                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1340         if (pass_all)
1341                 addr_count = 0;
1342
1343         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1344         cmd = kzalloc(len, GFP_ATOMIC);
1345         if (!cmd)
1346                 return 0;
1347
1348         if (pass_all) {
1349                 cmd->pass_all = 1;
1350                 return (u64)(unsigned long)cmd;
1351         }
1352
1353         netdev_hw_addr_list_for_each(addr, mc_list) {
1354                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1355                                    cmd->count, addr->addr);
1356                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1357                        addr->addr, ETH_ALEN);
1358                 cmd->count++;
1359         }
1360
1361         return (u64)(unsigned long)cmd;
1362 }
1363
1364 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1365                                      unsigned int changed_flags,
1366                                      unsigned int *total_flags,
1367                                      u64 multicast)
1368 {
1369         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1370         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1371
1372         mutex_lock(&mvm->mutex);
1373
1374         /* replace previous configuration */
1375         kfree(mvm->mcast_filter_cmd);
1376         mvm->mcast_filter_cmd = cmd;
1377
1378         if (!cmd)
1379                 goto out;
1380
1381         iwl_mvm_recalc_multicast(mvm);
1382 out:
1383         mutex_unlock(&mvm->mutex);
1384         *total_flags = 0;
1385 }
1386
1387 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1388 struct iwl_bcast_iter_data {
1389         struct iwl_mvm *mvm;
1390         struct iwl_bcast_filter_cmd *cmd;
1391         u8 current_filter;
1392 };
1393
1394 static void
1395 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1396                          const struct iwl_fw_bcast_filter *in_filter,
1397                          struct iwl_fw_bcast_filter *out_filter)
1398 {
1399         struct iwl_fw_bcast_filter_attr *attr;
1400         int i;
1401
1402         memcpy(out_filter, in_filter, sizeof(*out_filter));
1403
1404         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1405                 attr = &out_filter->attrs[i];
1406
1407                 if (!attr->mask)
1408                         break;
1409
1410                 switch (attr->reserved1) {
1411                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1412                         if (vif->bss_conf.arp_addr_cnt != 1) {
1413                                 attr->mask = 0;
1414                                 continue;
1415                         }
1416
1417                         attr->val = vif->bss_conf.arp_addr_list[0];
1418                         break;
1419                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1420                         attr->val = *(__be32 *)&vif->addr[2];
1421                         break;
1422                 default:
1423                         break;
1424                 }
1425                 attr->reserved1 = 0;
1426                 out_filter->num_attrs++;
1427         }
1428 }
1429
1430 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1431                                           struct ieee80211_vif *vif)
1432 {
1433         struct iwl_bcast_iter_data *data = _data;
1434         struct iwl_mvm *mvm = data->mvm;
1435         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1436         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1437         struct iwl_fw_bcast_mac *bcast_mac;
1438         int i;
1439
1440         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1441                 return;
1442
1443         bcast_mac = &cmd->macs[mvmvif->id];
1444
1445         /*
1446          * enable filtering only for associated stations, but not for P2P
1447          * Clients
1448          */
1449         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1450             !vif->bss_conf.assoc)
1451                 return;
1452
1453         bcast_mac->default_discard = 1;
1454
1455         /* copy all configured filters */
1456         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1457                 /*
1458                  * Make sure we don't exceed our filters limit.
1459                  * if there is still a valid filter to be configured,
1460                  * be on the safe side and just allow bcast for this mac.
1461                  */
1462                 if (WARN_ON_ONCE(data->current_filter >=
1463                                  ARRAY_SIZE(cmd->filters))) {
1464                         bcast_mac->default_discard = 0;
1465                         bcast_mac->attached_filters = 0;
1466                         break;
1467                 }
1468
1469                 iwl_mvm_set_bcast_filter(vif,
1470                                          &mvm->bcast_filters[i],
1471                                          &cmd->filters[data->current_filter]);
1472
1473                 /* skip current filter if it contains no attributes */
1474                 if (!cmd->filters[data->current_filter].num_attrs)
1475                         continue;
1476
1477                 /* attach the filter to current mac */
1478                 bcast_mac->attached_filters |=
1479                                 cpu_to_le16(BIT(data->current_filter));
1480
1481                 data->current_filter++;
1482         }
1483 }
1484
1485 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1486                                     struct iwl_bcast_filter_cmd *cmd)
1487 {
1488         struct iwl_bcast_iter_data iter_data = {
1489                 .mvm = mvm,
1490                 .cmd = cmd,
1491         };
1492
1493         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1494                 return false;
1495
1496         memset(cmd, 0, sizeof(*cmd));
1497         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1498         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1499
1500 #ifdef CONFIG_IWLWIFI_DEBUGFS
1501         /* use debugfs filters/macs if override is configured */
1502         if (mvm->dbgfs_bcast_filtering.override) {
1503                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1504                        sizeof(cmd->filters));
1505                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1506                        sizeof(cmd->macs));
1507                 return true;
1508         }
1509 #endif
1510
1511         /* if no filters are configured, do nothing */
1512         if (!mvm->bcast_filters)
1513                 return false;
1514
1515         /* configure and attach these filters for each associated sta vif */
1516         ieee80211_iterate_active_interfaces(
1517                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1518                 iwl_mvm_bcast_filter_iterator, &iter_data);
1519
1520         return true;
1521 }
1522 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1523                                           struct ieee80211_vif *vif)
1524 {
1525         struct iwl_bcast_filter_cmd cmd;
1526
1527         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1528                 return 0;
1529
1530         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1531                 return 0;
1532
1533         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1534                                     sizeof(cmd), &cmd);
1535 }
1536 #else
1537 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1538                                                  struct ieee80211_vif *vif)
1539 {
1540         return 0;
1541 }
1542 #endif
1543
1544 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1545                                              struct ieee80211_vif *vif,
1546                                              struct ieee80211_bss_conf *bss_conf,
1547                                              u32 changes)
1548 {
1549         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1550         int ret;
1551
1552         /*
1553          * Re-calculate the tsf id, as the master-slave relations depend on the
1554          * beacon interval, which was not known when the station interface was
1555          * added.
1556          */
1557         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1558                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1559
1560         /*
1561          * If we're not associated yet, take the (new) BSSID before associating
1562          * so the firmware knows. If we're already associated, then use the old
1563          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1564          * branch for disassociation below.
1565          */
1566         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1567                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1568
1569         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1570         if (ret)
1571                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1572
1573         /* after sending it once, adopt mac80211 data */
1574         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1575         mvmvif->associated = bss_conf->assoc;
1576
1577         if (changes & BSS_CHANGED_ASSOC) {
1578                 if (bss_conf->assoc) {
1579                         /* add quota for this interface */
1580                         ret = iwl_mvm_update_quotas(mvm, NULL);
1581                         if (ret) {
1582                                 IWL_ERR(mvm, "failed to update quotas\n");
1583                                 return;
1584                         }
1585
1586                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1587                                      &mvm->status)) {
1588                                 /*
1589                                  * If we're restarting then the firmware will
1590                                  * obviously have lost synchronisation with
1591                                  * the AP. It will attempt to synchronise by
1592                                  * itself, but we can make it more reliable by
1593                                  * scheduling a session protection time event.
1594                                  *
1595                                  * The firmware needs to receive a beacon to
1596                                  * catch up with synchronisation, use 110% of
1597                                  * the beacon interval.
1598                                  *
1599                                  * Set a large maximum delay to allow for more
1600                                  * than a single interface.
1601                                  */
1602                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1603                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1604                                                         5 * dur, false);
1605                         }
1606
1607                         iwl_mvm_sf_update(mvm, vif, false);
1608                         iwl_mvm_power_vif_assoc(mvm, vif);
1609                         if (vif->p2p) {
1610                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1611                                 iwl_mvm_update_smps(mvm, vif,
1612                                                     IWL_MVM_SMPS_REQ_PROT,
1613                                                     IEEE80211_SMPS_DYNAMIC);
1614                         }
1615                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1616                         /*
1617                          * If update fails - SF might be running in associated
1618                          * mode while disassociated - which is forbidden.
1619                          */
1620                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1621                                   "Failed to update SF upon disassociation\n");
1622
1623                         /* remove AP station now that the MAC is unassoc */
1624                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1625                         if (ret)
1626                                 IWL_ERR(mvm, "failed to remove AP station\n");
1627
1628                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1629                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1630                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1631                         /* remove quota for this interface */
1632                         ret = iwl_mvm_update_quotas(mvm, NULL);
1633                         if (ret)
1634                                 IWL_ERR(mvm, "failed to update quotas\n");
1635
1636                         if (vif->p2p)
1637                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1638
1639                         /* this will take the cleared BSSID from bss_conf */
1640                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1641                         if (ret)
1642                                 IWL_ERR(mvm,
1643                                         "failed to update MAC %pM (clear after unassoc)\n",
1644                                         vif->addr);
1645                 }
1646
1647                 iwl_mvm_recalc_multicast(mvm);
1648                 iwl_mvm_configure_bcast_filter(mvm, vif);
1649
1650                 /* reset rssi values */
1651                 mvmvif->bf_data.ave_beacon_signal = 0;
1652
1653                 iwl_mvm_bt_coex_vif_change(mvm);
1654                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1655                                     IEEE80211_SMPS_AUTOMATIC);
1656         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1657                 /*
1658                  * We received a beacon _after_ association so
1659                  * remove the session protection.
1660                  */
1661                 iwl_mvm_remove_time_event(mvm, mvmvif,
1662                                           &mvmvif->time_event_data);
1663         }
1664
1665         if (changes & BSS_CHANGED_BEACON_INFO) {
1666                 iwl_mvm_sf_update(mvm, vif, false);
1667                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1668         }
1669
1670         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1671                 ret = iwl_mvm_power_update_mac(mvm);
1672                 if (ret)
1673                         IWL_ERR(mvm, "failed to update power mode\n");
1674         }
1675
1676         if (changes & BSS_CHANGED_TXPOWER) {
1677                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1678                                 bss_conf->txpower);
1679                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1680         }
1681
1682         if (changes & BSS_CHANGED_CQM) {
1683                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1684                 /* reset cqm events tracking */
1685                 mvmvif->bf_data.last_cqm_event = 0;
1686                 if (mvmvif->bf_data.bf_enabled) {
1687                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1688                         if (ret)
1689                                 IWL_ERR(mvm,
1690                                         "failed to update CQM thresholds\n");
1691                 }
1692         }
1693
1694         if (changes & BSS_CHANGED_ARP_FILTER) {
1695                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1696                 iwl_mvm_configure_bcast_filter(mvm, vif);
1697         }
1698 }
1699
1700 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1701                                  struct ieee80211_vif *vif)
1702 {
1703         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1704         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1705         int ret;
1706
1707         /*
1708          * iwl_mvm_mac_ctxt_add() might read directly from the device
1709          * (the system time), so make sure it is available.
1710          */
1711         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1712         if (ret)
1713                 return ret;
1714
1715         mutex_lock(&mvm->mutex);
1716
1717         /* Send the beacon template */
1718         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1719         if (ret)
1720                 goto out_unlock;
1721
1722         /*
1723          * Re-calculate the tsf id, as the master-slave relations depend on the
1724          * beacon interval, which was not known when the AP interface was added.
1725          */
1726         if (vif->type == NL80211_IFTYPE_AP)
1727                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1728
1729         /* Add the mac context */
1730         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1731         if (ret)
1732                 goto out_unlock;
1733
1734         /* Perform the binding */
1735         ret = iwl_mvm_binding_add_vif(mvm, vif);
1736         if (ret)
1737                 goto out_remove;
1738
1739         /* Send the bcast station. At this stage the TBTT and DTIM time events
1740          * are added and applied to the scheduler */
1741         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1742         if (ret)
1743                 goto out_unbind;
1744
1745         /* must be set before quota calculations */
1746         mvmvif->ap_ibss_active = true;
1747
1748         /* power updated needs to be done before quotas */
1749         iwl_mvm_power_update_mac(mvm);
1750
1751         ret = iwl_mvm_update_quotas(mvm, NULL);
1752         if (ret)
1753                 goto out_quota_failed;
1754
1755         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1756         if (vif->p2p && mvm->p2p_device_vif)
1757                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1758
1759         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1760
1761         iwl_mvm_bt_coex_vif_change(mvm);
1762
1763         /* we don't support TDLS during DCM */
1764         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1765                 iwl_mvm_teardown_tdls_peers(mvm);
1766
1767         mutex_unlock(&mvm->mutex);
1768         return 0;
1769
1770 out_quota_failed:
1771         iwl_mvm_power_update_mac(mvm);
1772         mvmvif->ap_ibss_active = false;
1773         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1774 out_unbind:
1775         iwl_mvm_binding_remove_vif(mvm, vif);
1776 out_remove:
1777         iwl_mvm_mac_ctxt_remove(mvm, vif);
1778 out_unlock:
1779         mutex_unlock(&mvm->mutex);
1780         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1781         return ret;
1782 }
1783
1784 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1785                                  struct ieee80211_vif *vif)
1786 {
1787         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1788         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1789
1790         iwl_mvm_prepare_mac_removal(mvm, vif);
1791
1792         mutex_lock(&mvm->mutex);
1793
1794         /* Handle AP stop while in CSA */
1795         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1796                 iwl_mvm_remove_time_event(mvm, mvmvif,
1797                                           &mvmvif->time_event_data);
1798                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1799         }
1800
1801         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1802                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1803                 mvm->csa_tx_block_bcn_timeout = 0;
1804         }
1805
1806         mvmvif->ap_ibss_active = false;
1807         mvm->ap_last_beacon_gp2 = 0;
1808
1809         iwl_mvm_bt_coex_vif_change(mvm);
1810
1811         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1812
1813         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1814         if (vif->p2p && mvm->p2p_device_vif)
1815                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1816
1817         iwl_mvm_update_quotas(mvm, NULL);
1818         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1819         iwl_mvm_binding_remove_vif(mvm, vif);
1820
1821         iwl_mvm_power_update_mac(mvm);
1822
1823         iwl_mvm_mac_ctxt_remove(mvm, vif);
1824
1825         mutex_unlock(&mvm->mutex);
1826 }
1827
1828 static void
1829 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1830                                  struct ieee80211_vif *vif,
1831                                  struct ieee80211_bss_conf *bss_conf,
1832                                  u32 changes)
1833 {
1834         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1835
1836         /* Changes will be applied when the AP/IBSS is started */
1837         if (!mvmvif->ap_ibss_active)
1838                 return;
1839
1840         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1841                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1842             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1843                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1844
1845         /* Need to send a new beacon template to the FW */
1846         if (changes & BSS_CHANGED_BEACON &&
1847             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1848                 IWL_WARN(mvm, "Failed updating beacon data\n");
1849
1850         if (changes & BSS_CHANGED_TXPOWER) {
1851                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1852                                 bss_conf->txpower);
1853                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1854         }
1855
1856 }
1857
1858 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1859                                      struct ieee80211_vif *vif,
1860                                      struct ieee80211_bss_conf *bss_conf,
1861                                      u32 changes)
1862 {
1863         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1864
1865         /*
1866          * iwl_mvm_bss_info_changed_station() might call
1867          * iwl_mvm_protect_session(), which reads directly from
1868          * the device (the system time), so make sure it is available.
1869          */
1870         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1871                 return;
1872
1873         mutex_lock(&mvm->mutex);
1874
1875         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1876                 iwl_mvm_scan_offload_stop(mvm, true);
1877
1878         switch (vif->type) {
1879         case NL80211_IFTYPE_STATION:
1880                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1881                 break;
1882         case NL80211_IFTYPE_AP:
1883         case NL80211_IFTYPE_ADHOC:
1884                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1885                 break;
1886         default:
1887                 /* shouldn't happen */
1888                 WARN_ON_ONCE(1);
1889         }
1890
1891         mutex_unlock(&mvm->mutex);
1892         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1893 }
1894
1895 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1896                                           enum iwl_scan_status scan_type)
1897 {
1898         int ret;
1899         bool wait_for_handlers = false;
1900
1901         mutex_lock(&mvm->mutex);
1902
1903         if (mvm->scan_status != scan_type) {
1904                 ret = 0;
1905                 /* make sure there are no pending notifications */
1906                 wait_for_handlers = true;
1907                 goto out;
1908         }
1909
1910         switch (scan_type) {
1911         case IWL_MVM_SCAN_SCHED:
1912                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1913                 break;
1914         case IWL_MVM_SCAN_OS:
1915                 ret = iwl_mvm_cancel_scan(mvm);
1916                 break;
1917         case IWL_MVM_SCAN_NONE:
1918         default:
1919                 WARN_ON_ONCE(1);
1920                 ret = -EINVAL;
1921                 break;
1922         }
1923         if (ret)
1924                 goto out;
1925
1926         wait_for_handlers = true;
1927 out:
1928         mutex_unlock(&mvm->mutex);
1929
1930         /* make sure we consume the completion notification */
1931         if (wait_for_handlers)
1932                 iwl_mvm_wait_for_async_handlers(mvm);
1933
1934         return ret;
1935 }
1936 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1937                                struct ieee80211_vif *vif,
1938                                struct ieee80211_scan_request *hw_req)
1939 {
1940         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1941         struct cfg80211_scan_request *req = &hw_req->req;
1942         int ret;
1943
1944         if (req->n_channels == 0 ||
1945             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1946                 return -EINVAL;
1947
1948         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1949                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1950                 if (ret)
1951                         return ret;
1952         }
1953
1954         mutex_lock(&mvm->mutex);
1955
1956         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1957                 ret = -EBUSY;
1958                 goto out;
1959         }
1960
1961         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1962
1963         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1964                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
1965         else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1966                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1967         else
1968                 ret = iwl_mvm_scan_request(mvm, vif, req);
1969
1970         if (ret)
1971                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1972 out:
1973         mutex_unlock(&mvm->mutex);
1974         return ret;
1975 }
1976
1977 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1978                                        struct ieee80211_vif *vif)
1979 {
1980         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1981
1982         mutex_lock(&mvm->mutex);
1983
1984         iwl_mvm_cancel_scan(mvm);
1985
1986         mutex_unlock(&mvm->mutex);
1987 }
1988
1989 static void
1990 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1991                                   struct ieee80211_sta *sta, u16 tids,
1992                                   int num_frames,
1993                                   enum ieee80211_frame_release_type reason,
1994                                   bool more_data)
1995 {
1996         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1997
1998         /* Called when we need to transmit (a) frame(s) from mac80211 */
1999
2000         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2001                                           tids, more_data, false);
2002 }
2003
2004 static void
2005 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2006                                     struct ieee80211_sta *sta, u16 tids,
2007                                     int num_frames,
2008                                     enum ieee80211_frame_release_type reason,
2009                                     bool more_data)
2010 {
2011         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2012
2013         /* Called when we need to transmit (a) frame(s) from agg queue */
2014
2015         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2016                                           tids, more_data, true);
2017 }
2018
2019 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2020                                    struct ieee80211_vif *vif,
2021                                    enum sta_notify_cmd cmd,
2022                                    struct ieee80211_sta *sta)
2023 {
2024         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2025         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2026         int tid;
2027
2028         switch (cmd) {
2029         case STA_NOTIFY_SLEEP:
2030                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2031                         ieee80211_sta_block_awake(hw, sta, true);
2032                 spin_lock_bh(&mvmsta->lock);
2033                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2034                         struct iwl_mvm_tid_data *tid_data;
2035
2036                         tid_data = &mvmsta->tid_data[tid];
2037                         if (tid_data->state != IWL_AGG_ON &&
2038                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2039                                 continue;
2040                         if (iwl_mvm_tid_queued(tid_data) == 0)
2041                                 continue;
2042                         ieee80211_sta_set_buffered(sta, tid, true);
2043                 }
2044                 spin_unlock_bh(&mvmsta->lock);
2045                 /*
2046                  * The fw updates the STA to be asleep. Tx packets on the Tx
2047                  * queues to this station will not be transmitted. The fw will
2048                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2049                  */
2050                 break;
2051         case STA_NOTIFY_AWAKE:
2052                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2053                         break;
2054                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2055                 break;
2056         default:
2057                 break;
2058         }
2059 }
2060
2061 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2062                                        struct ieee80211_vif *vif,
2063                                        struct ieee80211_sta *sta)
2064 {
2065         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2066         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2067
2068         /*
2069          * This is called before mac80211 does RCU synchronisation,
2070          * so here we already invalidate our internal RCU-protected
2071          * station pointer. The rest of the code will thus no longer
2072          * be able to find the station this way, and we don't rely
2073          * on further RCU synchronisation after the sta_state()
2074          * callback deleted the station.
2075          */
2076         mutex_lock(&mvm->mutex);
2077         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2078                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2079                                    ERR_PTR(-ENOENT));
2080         mutex_unlock(&mvm->mutex);
2081 }
2082
2083 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2084                                  struct ieee80211_vif *vif,
2085                                  struct ieee80211_sta *sta,
2086                                  enum ieee80211_sta_state old_state,
2087                                  enum ieee80211_sta_state new_state)
2088 {
2089         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2090         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2091         int ret;
2092
2093         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2094                            sta->addr, old_state, new_state);
2095
2096         /* this would be a mac80211 bug ... but don't crash */
2097         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2098                 return -EINVAL;
2099
2100         /* if a STA is being removed, reuse its ID */
2101         flush_work(&mvm->sta_drained_wk);
2102
2103         mutex_lock(&mvm->mutex);
2104         if (old_state == IEEE80211_STA_NOTEXIST &&
2105             new_state == IEEE80211_STA_NONE) {
2106                 /*
2107                  * Firmware bug - it'll crash if the beacon interval is less
2108                  * than 16. We can't avoid connecting at all, so refuse the
2109                  * station state change, this will cause mac80211 to abandon
2110                  * attempts to connect to this AP, and eventually wpa_s will
2111                  * blacklist the AP...
2112                  */
2113                 if (vif->type == NL80211_IFTYPE_STATION &&
2114                     vif->bss_conf.beacon_int < 16) {
2115                         IWL_ERR(mvm,
2116                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2117                                 sta->addr, vif->bss_conf.beacon_int);
2118                         ret = -EINVAL;
2119                         goto out_unlock;
2120                 }
2121
2122                 if (sta->tdls &&
2123                     (vif->p2p ||
2124                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2125                                                 IWL_MVM_TDLS_STA_COUNT ||
2126                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2127                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2128                         ret = -EBUSY;
2129                         goto out_unlock;
2130                 }
2131
2132                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2133                 if (sta->tdls && ret == 0)
2134                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2135         } else if (old_state == IEEE80211_STA_NONE &&
2136                    new_state == IEEE80211_STA_AUTH) {
2137                 /*
2138                  * EBS may be disabled due to previous failures reported by FW.
2139                  * Reset EBS status here assuming environment has been changed.
2140                  */
2141                 mvm->last_ebs_successful = true;
2142                 ret = 0;
2143         } else if (old_state == IEEE80211_STA_AUTH &&
2144                    new_state == IEEE80211_STA_ASSOC) {
2145                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2146                 if (ret == 0)
2147                         iwl_mvm_rs_rate_init(mvm, sta,
2148                                              mvmvif->phy_ctxt->channel->band,
2149                                              true);
2150         } else if (old_state == IEEE80211_STA_ASSOC &&
2151                    new_state == IEEE80211_STA_AUTHORIZED) {
2152
2153                 /* we don't support TDLS during DCM */
2154                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2155                         iwl_mvm_teardown_tdls_peers(mvm);
2156
2157                 /* enable beacon filtering */
2158                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2159                 ret = 0;
2160         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2161                    new_state == IEEE80211_STA_ASSOC) {
2162                 /* disable beacon filtering */
2163                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2164                 ret = 0;
2165         } else if (old_state == IEEE80211_STA_ASSOC &&
2166                    new_state == IEEE80211_STA_AUTH) {
2167                 ret = 0;
2168         } else if (old_state == IEEE80211_STA_AUTH &&
2169                    new_state == IEEE80211_STA_NONE) {
2170                 ret = 0;
2171         } else if (old_state == IEEE80211_STA_NONE &&
2172                    new_state == IEEE80211_STA_NOTEXIST) {
2173                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2174                 if (sta->tdls)
2175                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2176         } else {
2177                 ret = -EIO;
2178         }
2179  out_unlock:
2180         mutex_unlock(&mvm->mutex);
2181
2182         return ret;
2183 }
2184
2185 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2186 {
2187         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2188
2189         mvm->rts_threshold = value;
2190
2191         return 0;
2192 }
2193
2194 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2195                                   struct ieee80211_vif *vif,
2196                                   struct ieee80211_sta *sta, u32 changed)
2197 {
2198         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2199
2200         if (vif->type == NL80211_IFTYPE_STATION &&
2201             changed & IEEE80211_RC_NSS_CHANGED)
2202                 iwl_mvm_sf_update(mvm, vif, false);
2203 }
2204
2205 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2206                                struct ieee80211_vif *vif, u16 ac,
2207                                const struct ieee80211_tx_queue_params *params)
2208 {
2209         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2210         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2211
2212         mvmvif->queue_params[ac] = *params;
2213
2214         /*
2215          * No need to update right away, we'll get BSS_CHANGED_QOS
2216          * The exception is P2P_DEVICE interface which needs immediate update.
2217          */
2218         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2219                 int ret;
2220
2221                 mutex_lock(&mvm->mutex);
2222                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2223                 mutex_unlock(&mvm->mutex);
2224                 return ret;
2225         }
2226         return 0;
2227 }
2228
2229 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2230                                       struct ieee80211_vif *vif)
2231 {
2232         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2233         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2234                            200 + vif->bss_conf.beacon_int);
2235         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2236                                100 + vif->bss_conf.beacon_int);
2237
2238         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2239                 return;
2240
2241         /*
2242          * iwl_mvm_protect_session() reads directly from the device
2243          * (the system time), so make sure it is available.
2244          */
2245         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2246                 return;
2247
2248         mutex_lock(&mvm->mutex);
2249         /* Try really hard to protect the session and hear a beacon */
2250         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2251         mutex_unlock(&mvm->mutex);
2252
2253         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2254 }
2255
2256 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2257                                         struct ieee80211_vif *vif,
2258                                         struct cfg80211_sched_scan_request *req,
2259                                         struct ieee80211_scan_ies *ies)
2260 {
2261         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2262         int ret;
2263
2264         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2265                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2266                 if (ret)
2267                         return ret;
2268         }
2269
2270         mutex_lock(&mvm->mutex);
2271
2272         /* Newest FW fixes sched scan while connected on another interface */
2273         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2274                 if (!vif->bss_conf.idle) {
2275                         ret = -EBUSY;
2276                         goto out;
2277                 }
2278         } else if (!iwl_mvm_is_idle(mvm)) {
2279                 ret = -EBUSY;
2280                 goto out;
2281         }
2282
2283         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2284                 ret = -EBUSY;
2285                 goto out;
2286         }
2287
2288         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2289         if (ret)
2290                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2291
2292 out:
2293         mutex_unlock(&mvm->mutex);
2294         return ret;
2295 }
2296
2297 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2298                                        struct ieee80211_vif *vif)
2299 {
2300         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2301         int ret;
2302
2303         mutex_lock(&mvm->mutex);
2304         ret = iwl_mvm_scan_offload_stop(mvm, false);
2305         mutex_unlock(&mvm->mutex);
2306         iwl_mvm_wait_for_async_handlers(mvm);
2307
2308         return ret;
2309
2310 }
2311
2312 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2313                                enum set_key_cmd cmd,
2314                                struct ieee80211_vif *vif,
2315                                struct ieee80211_sta *sta,
2316                                struct ieee80211_key_conf *key)
2317 {
2318         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2319         int ret;
2320
2321         if (iwlwifi_mod_params.sw_crypto) {
2322                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2323                 return -EOPNOTSUPP;
2324         }
2325
2326         switch (key->cipher) {
2327         case WLAN_CIPHER_SUITE_TKIP:
2328                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2329                 /* fall-through */
2330         case WLAN_CIPHER_SUITE_CCMP:
2331                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2332                 break;
2333         case WLAN_CIPHER_SUITE_AES_CMAC:
2334                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2335                 break;
2336         case WLAN_CIPHER_SUITE_WEP40:
2337         case WLAN_CIPHER_SUITE_WEP104:
2338                 /* For non-client mode, only use WEP keys for TX as we probably
2339                  * don't have a station yet anyway and would then have to keep
2340                  * track of the keys, linking them to each of the clients/peers
2341                  * as they appear. For now, don't do that, for performance WEP
2342                  * offload doesn't really matter much, but we need it for some
2343                  * other offload features in client mode.
2344                  */
2345                 if (vif->type != NL80211_IFTYPE_STATION)
2346                         return 0;
2347                 break;
2348         default:
2349                 /* currently FW supports only one optional cipher scheme */
2350                 if (hw->n_cipher_schemes &&
2351                     hw->cipher_schemes->cipher == key->cipher)
2352                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2353                 else
2354                         return -EOPNOTSUPP;
2355         }
2356
2357         mutex_lock(&mvm->mutex);
2358
2359         switch (cmd) {
2360         case SET_KEY:
2361                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2362                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2363                         /*
2364                          * GTK on AP interface is a TX-only key, return 0;
2365                          * on IBSS they're per-station and because we're lazy
2366                          * we don't support them for RX, so do the same.
2367                          */
2368                         ret = 0;
2369                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2370                         break;
2371                 }
2372
2373                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2374                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2375                 if (ret) {
2376                         IWL_WARN(mvm, "set key failed\n");
2377                         /*
2378                          * can't add key for RX, but we don't need it
2379                          * in the device for TX so still return 0
2380                          */
2381                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2382                         ret = 0;
2383                 }
2384
2385                 break;
2386         case DISABLE_KEY:
2387                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2388                         ret = 0;
2389                         break;
2390                 }
2391
2392                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2393                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2394                 break;
2395         default:
2396                 ret = -EINVAL;
2397         }
2398
2399         mutex_unlock(&mvm->mutex);
2400         return ret;
2401 }
2402
2403 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2404                                         struct ieee80211_vif *vif,
2405                                         struct ieee80211_key_conf *keyconf,
2406                                         struct ieee80211_sta *sta,
2407                                         u32 iv32, u16 *phase1key)
2408 {
2409         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2410
2411         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2412                 return;
2413
2414         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2415 }
2416
2417
2418 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2419                                struct iwl_rx_packet *pkt, void *data)
2420 {
2421         struct iwl_mvm *mvm =
2422                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2423         struct iwl_hs20_roc_res *resp;
2424         int resp_len = iwl_rx_packet_payload_len(pkt);
2425         struct iwl_mvm_time_event_data *te_data = data;
2426
2427         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2428                 return true;
2429
2430         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2431                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2432                 return true;
2433         }
2434
2435         resp = (void *)pkt->data;
2436
2437         IWL_DEBUG_TE(mvm,
2438                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2439                      resp->status, resp->event_unique_id);
2440
2441         te_data->uid = le32_to_cpu(resp->event_unique_id);
2442         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2443                      te_data->uid);
2444
2445         spin_lock_bh(&mvm->time_event_lock);
2446         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2447         spin_unlock_bh(&mvm->time_event_lock);
2448
2449         return true;
2450 }
2451
2452 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2453 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2454                                     struct ieee80211_channel *channel,
2455                                     struct ieee80211_vif *vif,
2456                                     int duration)
2457 {
2458         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2459         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2460         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2461         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2462         struct iwl_notification_wait wait_time_event;
2463         struct iwl_hs20_roc_req aux_roc_req = {
2464                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2465                 .id_and_color =
2466                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2467                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2468                 /* Set the channel info data */
2469                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2470                         PHY_BAND_24 : PHY_BAND_5,
2471                 .channel_info.channel = channel->hw_value,
2472                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2473                 /* Set the time and duration */
2474                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2475                 .apply_time_max_delay =
2476                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2477                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2478          };
2479
2480         /* Set the node address */
2481         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2482
2483         lockdep_assert_held(&mvm->mutex);
2484
2485         spin_lock_bh(&mvm->time_event_lock);
2486
2487         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2488                 spin_unlock_bh(&mvm->time_event_lock);
2489                 return -EIO;
2490         }
2491
2492         te_data->vif = vif;
2493         te_data->duration = duration;
2494         te_data->id = HOT_SPOT_CMD;
2495
2496         spin_unlock_bh(&mvm->time_event_lock);
2497
2498         /*
2499          * Use a notification wait, which really just processes the
2500          * command response and doesn't wait for anything, in order
2501          * to be able to process the response and get the UID inside
2502          * the RX path. Using CMD_WANT_SKB doesn't work because it
2503          * stores the buffer and then wakes up this thread, by which
2504          * time another notification (that the time event started)
2505          * might already be processed unsuccessfully.
2506          */
2507         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2508                                    time_event_response,
2509                                    ARRAY_SIZE(time_event_response),
2510                                    iwl_mvm_rx_aux_roc, te_data);
2511
2512         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2513                                    &aux_roc_req);
2514
2515         if (res) {
2516                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2517                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2518                 goto out_clear_te;
2519         }
2520
2521         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2522         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2523         /* should never fail */
2524         WARN_ON_ONCE(res);
2525
2526         if (res) {
2527  out_clear_te:
2528                 spin_lock_bh(&mvm->time_event_lock);
2529                 iwl_mvm_te_clear_data(mvm, te_data);
2530                 spin_unlock_bh(&mvm->time_event_lock);
2531         }
2532
2533         return res;
2534 }
2535
2536 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2537                        struct ieee80211_vif *vif,
2538                        struct ieee80211_channel *channel,
2539                        int duration,
2540                        enum ieee80211_roc_type type)
2541 {
2542         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2543         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2544         struct cfg80211_chan_def chandef;
2545         struct iwl_mvm_phy_ctxt *phy_ctxt;
2546         int ret, i;
2547
2548         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2549                            duration, type);
2550
2551         mutex_lock(&mvm->mutex);
2552
2553         switch (vif->type) {
2554         case NL80211_IFTYPE_STATION:
2555                 /* Use aux roc framework (HS20) */
2556                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2557                                                vif, duration);
2558                 goto out_unlock;
2559         case NL80211_IFTYPE_P2P_DEVICE:
2560                 /* handle below */
2561                 break;
2562         default:
2563                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2564                 ret = -EINVAL;
2565                 goto out_unlock;
2566         }
2567
2568         for (i = 0; i < NUM_PHY_CTX; i++) {
2569                 phy_ctxt = &mvm->phy_ctxts[i];
2570                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2571                         continue;
2572
2573                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2574                         /*
2575                          * Unbind the P2P_DEVICE from the current PHY context,
2576                          * and if the PHY context is not used remove it.
2577                          */
2578                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2579                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2580                                 goto out_unlock;
2581
2582                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2583
2584                         /* Bind the P2P_DEVICE to the current PHY Context */
2585                         mvmvif->phy_ctxt = phy_ctxt;
2586
2587                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2588                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2589                                 goto out_unlock;
2590
2591                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2592                         goto schedule_time_event;
2593                 }
2594         }
2595
2596         /* Need to update the PHY context only if the ROC channel changed */
2597         if (channel == mvmvif->phy_ctxt->channel)
2598                 goto schedule_time_event;
2599
2600         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2601
2602         /*
2603          * Change the PHY context configuration as it is currently referenced
2604          * only by the P2P Device MAC
2605          */
2606         if (mvmvif->phy_ctxt->ref == 1) {
2607                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2608                                                &chandef, 1, 1);
2609                 if (ret)
2610                         goto out_unlock;
2611         } else {
2612                 /*
2613                  * The PHY context is shared with other MACs. Need to remove the
2614                  * P2P Device from the binding, allocate an new PHY context and
2615                  * create a new binding
2616                  */
2617                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2618                 if (!phy_ctxt) {
2619                         ret = -ENOSPC;
2620                         goto out_unlock;
2621                 }
2622
2623                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2624                                                1, 1);
2625                 if (ret) {
2626                         IWL_ERR(mvm, "Failed to change PHY context\n");
2627                         goto out_unlock;
2628                 }
2629
2630                 /* Unbind the P2P_DEVICE from the current PHY context */
2631                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2632                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2633                         goto out_unlock;
2634
2635                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2636
2637                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2638                 mvmvif->phy_ctxt = phy_ctxt;
2639
2640                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2641                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2642                         goto out_unlock;
2643
2644                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2645         }
2646
2647 schedule_time_event:
2648         /* Schedule the time events */
2649         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2650
2651 out_unlock:
2652         mutex_unlock(&mvm->mutex);
2653         IWL_DEBUG_MAC80211(mvm, "leave\n");
2654         return ret;
2655 }
2656
2657 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2658 {
2659         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2660
2661         IWL_DEBUG_MAC80211(mvm, "enter\n");
2662
2663         mutex_lock(&mvm->mutex);
2664         iwl_mvm_stop_roc(mvm);
2665         mutex_unlock(&mvm->mutex);
2666
2667         IWL_DEBUG_MAC80211(mvm, "leave\n");
2668         return 0;
2669 }
2670
2671 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2672                                  struct ieee80211_chanctx_conf *ctx)
2673 {
2674         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2675         struct iwl_mvm_phy_ctxt *phy_ctxt;
2676         int ret;
2677
2678         lockdep_assert_held(&mvm->mutex);
2679
2680         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2681
2682         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2683         if (!phy_ctxt) {
2684                 ret = -ENOSPC;
2685                 goto out;
2686         }
2687
2688         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2689                                        ctx->rx_chains_static,
2690                                        ctx->rx_chains_dynamic);
2691         if (ret) {
2692                 IWL_ERR(mvm, "Failed to add PHY context\n");
2693                 goto out;
2694         }
2695
2696         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2697         *phy_ctxt_id = phy_ctxt->id;
2698 out:
2699         return ret;
2700 }
2701
2702 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2703                                struct ieee80211_chanctx_conf *ctx)
2704 {
2705         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2706         int ret;
2707
2708         mutex_lock(&mvm->mutex);
2709         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2710         mutex_unlock(&mvm->mutex);
2711
2712         return ret;
2713 }
2714
2715 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2716                                      struct ieee80211_chanctx_conf *ctx)
2717 {
2718         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2719         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2720
2721         lockdep_assert_held(&mvm->mutex);
2722
2723         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2724 }
2725
2726 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2727                                    struct ieee80211_chanctx_conf *ctx)
2728 {
2729         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2730
2731         mutex_lock(&mvm->mutex);
2732         __iwl_mvm_remove_chanctx(mvm, ctx);
2733         mutex_unlock(&mvm->mutex);
2734 }
2735
2736 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2737                                    struct ieee80211_chanctx_conf *ctx,
2738                                    u32 changed)
2739 {
2740         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2741         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2742         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2743
2744         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2745                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2746                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2747                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2748                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2749                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2750                       phy_ctxt->ref, changed))
2751                 return;
2752
2753         mutex_lock(&mvm->mutex);
2754         iwl_mvm_bt_coex_vif_change(mvm);
2755         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2756                                  ctx->rx_chains_static,
2757                                  ctx->rx_chains_dynamic);
2758         mutex_unlock(&mvm->mutex);
2759 }
2760
2761 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2762                                         struct ieee80211_vif *vif,
2763                                         struct ieee80211_chanctx_conf *ctx,
2764                                         bool switching_chanctx)
2765 {
2766         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2767         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2768         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2769         int ret;
2770
2771         lockdep_assert_held(&mvm->mutex);
2772
2773         mvmvif->phy_ctxt = phy_ctxt;
2774
2775         switch (vif->type) {
2776         case NL80211_IFTYPE_AP:
2777                 /* Unless it's a CSA flow we have nothing to do here */
2778                 if (vif->csa_active) {
2779                         mvmvif->ap_ibss_active = true;
2780                         break;
2781                 }
2782         case NL80211_IFTYPE_ADHOC:
2783                 /*
2784                  * The AP binding flow is handled as part of the start_ap flow
2785                  * (in bss_info_changed), similarly for IBSS.
2786                  */
2787                 ret = 0;
2788                 goto out;
2789         case NL80211_IFTYPE_STATION:
2790                 break;
2791         case NL80211_IFTYPE_MONITOR:
2792                 /* always disable PS when a monitor interface is active */
2793                 mvmvif->ps_disabled = true;
2794                 break;
2795         default:
2796                 ret = -EINVAL;
2797                 goto out;
2798         }
2799
2800         ret = iwl_mvm_binding_add_vif(mvm, vif);
2801         if (ret)
2802                 goto out;
2803
2804         /*
2805          * Power state must be updated before quotas,
2806          * otherwise fw will complain.
2807          */
2808         iwl_mvm_power_update_mac(mvm);
2809
2810         /* Setting the quota at this stage is only required for monitor
2811          * interfaces. For the other types, the bss_info changed flow
2812          * will handle quota settings.
2813          */
2814         if (vif->type == NL80211_IFTYPE_MONITOR) {
2815                 mvmvif->monitor_active = true;
2816                 ret = iwl_mvm_update_quotas(mvm, NULL);
2817                 if (ret)
2818                         goto out_remove_binding;
2819         }
2820
2821         /* Handle binding during CSA */
2822         if ((vif->type == NL80211_IFTYPE_AP) ||
2823             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2824                 iwl_mvm_update_quotas(mvm, NULL);
2825                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2826         }
2827
2828         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2829                 struct iwl_mvm_sta *mvmsta;
2830
2831                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2832                                                           mvmvif->ap_sta_id);
2833
2834                 if (WARN_ON(!mvmsta))
2835                         goto out;
2836
2837                 /* TODO: only re-enable after the first beacon */
2838                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2839         }
2840
2841         goto out;
2842
2843 out_remove_binding:
2844         iwl_mvm_binding_remove_vif(mvm, vif);
2845         iwl_mvm_power_update_mac(mvm);
2846 out:
2847         if (ret)
2848                 mvmvif->phy_ctxt = NULL;
2849         return ret;
2850 }
2851 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2852                                       struct ieee80211_vif *vif,
2853                                       struct ieee80211_chanctx_conf *ctx)
2854 {
2855         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2856         int ret;
2857
2858         mutex_lock(&mvm->mutex);
2859         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2860         mutex_unlock(&mvm->mutex);
2861
2862         return ret;
2863 }
2864
2865 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2866                                            struct ieee80211_vif *vif,
2867                                            struct ieee80211_chanctx_conf *ctx,
2868                                            bool switching_chanctx)
2869 {
2870         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2871         struct ieee80211_vif *disabled_vif = NULL;
2872         struct iwl_mvm_sta *mvmsta;
2873
2874         lockdep_assert_held(&mvm->mutex);
2875
2876         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2877
2878         switch (vif->type) {
2879         case NL80211_IFTYPE_ADHOC:
2880                 goto out;
2881         case NL80211_IFTYPE_MONITOR:
2882                 mvmvif->monitor_active = false;
2883                 mvmvif->ps_disabled = false;
2884                 break;
2885         case NL80211_IFTYPE_AP:
2886                 /* This part is triggered only during CSA */
2887                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2888                         goto out;
2889
2890                 /* Set CS bit on all the stations */
2891                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2892
2893                 /* Save blocked iface, the timeout is set on the next beacon */
2894                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2895
2896                 mvmvif->ap_ibss_active = false;
2897                 break;
2898         case NL80211_IFTYPE_STATION:
2899                 if (!switching_chanctx)
2900                         break;
2901
2902                 disabled_vif = vif;
2903
2904                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2905                                                           mvmvif->ap_sta_id);
2906
2907                 if (!WARN_ON(!mvmsta))
2908                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2909
2910                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2911                 break;
2912         default:
2913                 break;
2914         }
2915
2916         iwl_mvm_update_quotas(mvm, disabled_vif);
2917         iwl_mvm_binding_remove_vif(mvm, vif);
2918
2919 out:
2920         mvmvif->phy_ctxt = NULL;
2921         iwl_mvm_power_update_mac(mvm);
2922 }
2923
2924 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2925                                          struct ieee80211_vif *vif,
2926                                          struct ieee80211_chanctx_conf *ctx)
2927 {
2928         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2929
2930         mutex_lock(&mvm->mutex);
2931         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2932         mutex_unlock(&mvm->mutex);
2933 }
2934
2935 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2936                                       struct ieee80211_vif_chanctx_switch *vifs,
2937                                       int n_vifs,
2938                                       enum ieee80211_chanctx_switch_mode mode)
2939 {
2940         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2941         int ret;
2942
2943         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2944         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2945                 return -EOPNOTSUPP;
2946
2947         mutex_lock(&mvm->mutex);
2948         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2949         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2950
2951         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2952         if (ret) {
2953                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2954                 goto out_reassign;
2955         }
2956
2957         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2958                                            true);
2959         if (ret) {
2960                 IWL_ERR(mvm,
2961                         "failed to assign new_ctx during channel switch\n");
2962                 goto out_remove;
2963         }
2964
2965         /* we don't support TDLS during DCM - can be caused by channel switch */
2966         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2967                 iwl_mvm_teardown_tdls_peers(mvm);
2968
2969         goto out;
2970
2971 out_remove:
2972         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2973
2974 out_reassign:
2975         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2976         if (ret) {
2977                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2978                 goto out_restart;
2979         }
2980
2981         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2982                                            true);
2983         if (ret) {
2984                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2985                 goto out_restart;
2986         }
2987
2988         goto out;
2989
2990 out_restart:
2991         /* things keep failing, better restart the hw */
2992         iwl_mvm_nic_restart(mvm, false);
2993
2994 out:
2995         mutex_unlock(&mvm->mutex);
2996         return ret;
2997 }
2998
2999 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3000                            struct ieee80211_sta *sta,
3001                            bool set)
3002 {
3003         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3004         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
3005
3006         if (!mvm_sta || !mvm_sta->vif) {
3007                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3008                 return -EINVAL;
3009         }
3010
3011         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3012 }
3013
3014 #ifdef CONFIG_NL80211_TESTMODE
3015 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3016         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3017         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3018         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3019 };
3020
3021 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3022                                       struct ieee80211_vif *vif,
3023                                       void *data, int len)
3024 {
3025         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3026         int err;
3027         u32 noa_duration;
3028
3029         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3030         if (err)
3031                 return err;
3032
3033         if (!tb[IWL_MVM_TM_ATTR_CMD])
3034                 return -EINVAL;
3035
3036         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3037         case IWL_MVM_TM_CMD_SET_NOA:
3038                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3039                     !vif->bss_conf.enable_beacon ||
3040                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3041                         return -EINVAL;
3042
3043                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3044                 if (noa_duration >= vif->bss_conf.beacon_int)
3045                         return -EINVAL;
3046
3047                 mvm->noa_duration = noa_duration;
3048                 mvm->noa_vif = vif;
3049
3050                 return iwl_mvm_update_quotas(mvm, NULL);
3051         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3052                 /* must be associated client vif - ignore authorized */
3053                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3054                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3055                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3056                         return -EINVAL;
3057
3058                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3059                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3060                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3061         }
3062
3063         return -EOPNOTSUPP;
3064 }
3065
3066 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3067                                     struct ieee80211_vif *vif,
3068                                     void *data, int len)
3069 {
3070         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3071         int err;
3072
3073         mutex_lock(&mvm->mutex);
3074         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3075         mutex_unlock(&mvm->mutex);
3076
3077         return err;
3078 }
3079 #endif
3080
3081 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
3082                                           struct ieee80211_vif *vif,
3083                                           struct cfg80211_chan_def *chandef)
3084 {
3085         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3086         struct ieee80211_vif *csa_vif;
3087
3088         mutex_lock(&mvm->mutex);
3089
3090         csa_vif = rcu_dereference_protected(mvm->csa_vif,
3091                                             lockdep_is_held(&mvm->mutex));
3092         if (WARN(csa_vif && csa_vif->csa_active,
3093                  "Another CSA is already in progress"))
3094                 goto out_unlock;
3095
3096         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
3097                            chandef->center_freq1);
3098         rcu_assign_pointer(mvm->csa_vif, vif);
3099
3100 out_unlock:
3101         mutex_unlock(&mvm->mutex);
3102 }
3103
3104 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3105                               struct ieee80211_vif *vif, u32 queues, bool drop)
3106 {
3107         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3108         struct iwl_mvm_vif *mvmvif;
3109         struct iwl_mvm_sta *mvmsta;
3110
3111         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3112                 return;
3113
3114         mutex_lock(&mvm->mutex);
3115         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3116         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3117
3118         if (WARN_ON_ONCE(!mvmsta)) {
3119                 mutex_unlock(&mvm->mutex);
3120                 return;
3121         }
3122
3123         if (drop) {
3124                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3125                         IWL_ERR(mvm, "flush request fail\n");
3126                 mutex_unlock(&mvm->mutex);
3127         } else {
3128                 u32 tfd_queue_msk = mvmsta->tfd_queue_msk;
3129                 mutex_unlock(&mvm->mutex);
3130
3131                 /* this can take a while, and we may need/want other operations
3132                  * to succeed while doing this, so do it without the mutex held
3133                  */
3134                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_queue_msk);
3135         }
3136 }
3137
3138 const struct ieee80211_ops iwl_mvm_hw_ops = {
3139         .tx = iwl_mvm_mac_tx,
3140         .ampdu_action = iwl_mvm_mac_ampdu_action,
3141         .start = iwl_mvm_mac_start,
3142         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3143         .stop = iwl_mvm_mac_stop,
3144         .add_interface = iwl_mvm_mac_add_interface,
3145         .remove_interface = iwl_mvm_mac_remove_interface,
3146         .config = iwl_mvm_mac_config,
3147         .prepare_multicast = iwl_mvm_prepare_multicast,
3148         .configure_filter = iwl_mvm_configure_filter,
3149         .bss_info_changed = iwl_mvm_bss_info_changed,
3150         .hw_scan = iwl_mvm_mac_hw_scan,
3151         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3152         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3153         .sta_state = iwl_mvm_mac_sta_state,
3154         .sta_notify = iwl_mvm_mac_sta_notify,
3155         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3156         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3157         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3158         .sta_rc_update = iwl_mvm_sta_rc_update,
3159         .conf_tx = iwl_mvm_mac_conf_tx,
3160         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3161         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3162         .flush = iwl_mvm_mac_flush,
3163         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3164         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3165         .set_key = iwl_mvm_mac_set_key,
3166         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3167         .remain_on_channel = iwl_mvm_roc,
3168         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3169         .add_chanctx = iwl_mvm_add_chanctx,
3170         .remove_chanctx = iwl_mvm_remove_chanctx,
3171         .change_chanctx = iwl_mvm_change_chanctx,
3172         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3173         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3174         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3175
3176         .start_ap = iwl_mvm_start_ap_ibss,
3177         .stop_ap = iwl_mvm_stop_ap_ibss,
3178         .join_ibss = iwl_mvm_start_ap_ibss,
3179         .leave_ibss = iwl_mvm_stop_ap_ibss,
3180
3181         .set_tim = iwl_mvm_set_tim,
3182
3183         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3184
3185         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3186
3187 #ifdef CONFIG_PM_SLEEP
3188         /* look at d3.c */
3189         .suspend = iwl_mvm_suspend,
3190         .resume = iwl_mvm_resume,
3191         .set_wakeup = iwl_mvm_set_wakeup,
3192         .set_rekey_data = iwl_mvm_set_rekey_data,
3193 #if IS_ENABLED(CONFIG_IPV6)
3194         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3195 #endif
3196         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3197 #endif
3198 };