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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  23  * USA
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  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
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  43  *    notice, this list of conditions and the following disclaimer.
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  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  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 <net/mac80211.h>
  73 #include <net/ieee80211_radiotap.h>
  74 #include <net/tcp.h>
  75
  76 #include "iwl-op-mode.h"
  77 #include "iwl-io.h"
  78 #include "mvm.h"
  79 #include "sta.h"
  80 #include "time-event.h"
  81 #include "iwl-eeprom-parse.h"
  82 #include "fw-api-scan.h"
  83 #include "iwl-phy-db.h"
  84 #include "testmode.h"
  85 #include "iwl-fw-error-dump.h"
  86 #include "iwl-prph.h"
  87
  88 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  89         {
  90                 .max = 1,
  91                 .types = BIT(NL80211_IFTYPE_STATION),
  92         },
  93         {
  94                 .max = 1,
  95                 .types = BIT(NL80211_IFTYPE_AP) |
  96                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  97                         BIT(NL80211_IFTYPE_P2P_GO),
  98         },
  99         {
 100                 .max = 1,
 101                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 102         },
 103 };
 104
 105 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 106         {
 107                 .num_different_channels = 1,
 108                 .max_interfaces = 3,
 109                 .limits = iwl_mvm_limits,
 110                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 111         },
 112 };
 113
 114 #ifdef CONFIG_PM_SLEEP
 115 static const struct nl80211_wowlan_tcp_data_token_feature
 116 iwl_mvm_wowlan_tcp_token_feature = {
 117         .min_len = 0,
 118         .max_len = 255,
 119         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 120 };
 121
 122 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 123         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 124         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 125                             sizeof(struct ethhdr) -
 126                             sizeof(struct iphdr) -
 127                             sizeof(struct tcphdr),
 128         .data_interval_max = 65535, /* __le16 in API */
 129         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 130                             sizeof(struct ethhdr) -
 131                             sizeof(struct iphdr) -
 132                             sizeof(struct tcphdr),
 133         .seq = true,
 134 };
 135 #endif
 136
 137 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 138 /*
 139  * Use the reserved field to indicate magic values.
 140  * these values will only be used internally by the driver,
 141  * and won't make it to the fw (reserved will be 0).
 142  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 143  *      be the vif's ip address. in case there is not a single
 144  *      ip address (0, or more than 1), this attribute will
 145  *      be skipped.
 146  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 147  *      the LSB bytes of the vif's mac address
 148  */
 149 enum {
 150         BC_FILTER_MAGIC_NONE = 0,
 151         BC_FILTER_MAGIC_IP,
 152         BC_FILTER_MAGIC_MAC,
 153 };
 154
 155 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 156         {
 157                 /* arp */
 158                 .discard = 0,
 159                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 160                 .attrs = {
 161                         {
 162                                 /* frame type - arp, hw type - ethernet */
 163                                 .offset_type =
 164                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 165                                 .offset = sizeof(rfc1042_header),
 166                                 .val = cpu_to_be32(0x08060001),
 167                                 .mask = cpu_to_be32(0xffffffff),
 168                         },
 169                         {
 170                                 /* arp dest ip */
 171                                 .offset_type =
 172                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 173                                 .offset = sizeof(rfc1042_header) + 2 +
 174                                           sizeof(struct arphdr) +
 175                                           ETH_ALEN + sizeof(__be32) +
 176                                           ETH_ALEN,
 177                                 .mask = cpu_to_be32(0xffffffff),
 178                                 /* mark it as special field */
 179                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 180                         },
 181                 },
 182         },
 183         {
 184                 /* dhcp offer bcast */
 185                 .discard = 0,
 186                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 187                 .attrs = {
 188                         {
 189                                 /* udp dest port - 68 (bootp client)*/
 190                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 191                                 .offset = offsetof(struct udphdr, dest),
 192                                 .val = cpu_to_be32(0x00440000),
 193                                 .mask = cpu_to_be32(0xffff0000),
 194                         },
 195                         {
 196                                 /* dhcp - lsb bytes of client hw address */
 197                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 198                                 .offset = 38,
 199                                 .mask = cpu_to_be32(0xffffffff),
 200                                 /* mark it as special field */
 201                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 202                         },
 203                 },
 204         },
 205         /* last filter must be empty */
 206         {},
 207 };
 208 #endif
 209
 210 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 211 {
 212         if (!iwl_mvm_is_d0i3_supported(mvm))
 213                 return;
 214
 215         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 216         spin_lock_bh(&mvm->refs_lock);
 217         mvm->refs[ref_type]++;
 218         spin_unlock_bh(&mvm->refs_lock);
 219         iwl_trans_ref(mvm->trans);
 220 }
 221
 222 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 223 {
 224         if (!iwl_mvm_is_d0i3_supported(mvm))
 225                 return;
 226
 227         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 228         spin_lock_bh(&mvm->refs_lock);
 229         WARN_ON(!mvm->refs[ref_type]--);
 230         spin_unlock_bh(&mvm->refs_lock);
 231         iwl_trans_unref(mvm->trans);
 232 }
 233
 234 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 235                                      enum iwl_mvm_ref_type except_ref)
 236 {
 237         int i, j;
 238
 239         if (!iwl_mvm_is_d0i3_supported(mvm))
 240                 return;
 241
 242         spin_lock_bh(&mvm->refs_lock);
 243         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 244                 if (except_ref == i || !mvm->refs[i])
 245                         continue;
 246
 247                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 248                               i, mvm->refs[i]);
 249                 for (j = 0; j < mvm->refs[i]; j++)
 250                         iwl_trans_unref(mvm->trans);
 251                 mvm->refs[i] = 0;
 252         }
 253         spin_unlock_bh(&mvm->refs_lock);
 254 }
 255
 256 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 257 {
 258         iwl_mvm_ref(mvm, ref_type);
 259
 260         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 261                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 262                                 HZ)) {
 263                 WARN_ON_ONCE(1);
 264                 iwl_mvm_unref(mvm, ref_type);
 265                 return -EIO;
 266         }
 267
 268         return 0;
 269 }
 270
 271 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 272 {
 273         int i;
 274
 275         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 276         for (i = 0; i < NUM_PHY_CTX; i++) {
 277                 mvm->phy_ctxts[i].id = i;
 278                 mvm->phy_ctxts[i].ref = 0;
 279         }
 280 }
 281
 282 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 283 {
 284         struct ieee80211_hw *hw = mvm->hw;
 285         int num_mac, ret, i;
 286
 287         /* Tell mac80211 our characteristics */
 288         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 289                     IEEE80211_HW_SPECTRUM_MGMT |
 290                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 291                     IEEE80211_HW_QUEUE_CONTROL |
 292                     IEEE80211_HW_WANT_MONITOR_VIF |
 293                     IEEE80211_HW_SUPPORTS_PS |
 294                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 295                     IEEE80211_HW_AMPDU_AGGREGATION |
 296                     IEEE80211_HW_TIMING_BEACON_ONLY |
 297                     IEEE80211_HW_CONNECTION_MONITOR |
 298                     IEEE80211_HW_CHANCTX_STA_CSA |
 299                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 300
 301         hw->queues = mvm->first_agg_queue;
 302         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 303         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 304                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 305         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 306         hw->rate_control_algorithm = "iwl-mvm-rs";
 307
 308         /*
 309          * Enable 11w if advertised by firmware and software crypto
 310          * is not enabled (as the firmware will interpret some mgmt
 311          * packets, so enabling it with software crypto isn't safe)
 312          */
 313         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 314             !iwlwifi_mod_params.sw_crypto)
 315                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 316
 317         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 318             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 319             !iwlwifi_mod_params.uapsd_disable) {
 320                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 321                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 322                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 323         }
 324
 325         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 326                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 327
 328         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 329         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 330         hw->chanctx_data_size = sizeof(u16);
 331
 332         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 333                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 334                 BIT(NL80211_IFTYPE_AP) |
 335                 BIT(NL80211_IFTYPE_P2P_GO) |
 336                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 337                 BIT(NL80211_IFTYPE_ADHOC);
 338
 339         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 340         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 341                                        REGULATORY_DISABLE_BEACON_HINTS;
 342
 343         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 344                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 345
 346         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 347                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 348
 349         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 350         hw->wiphy->n_iface_combinations =
 351                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 352
 353         hw->wiphy->max_remain_on_channel_duration = 10000;
 354         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 355
 356         /* Extract MAC address */
 357         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 358         hw->wiphy->addresses = mvm->addresses;
 359         hw->wiphy->n_addresses = 1;
 360
 361         /* Extract additional MAC addresses if available */
 362         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 363                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 364
 365         for (i = 1; i < num_mac; i++) {
 366                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 367                        ETH_ALEN);
 368                 mvm->addresses[i].addr[5]++;
 369                 hw->wiphy->n_addresses++;
 370         }
 371
 372         iwl_mvm_reset_phy_ctxts(mvm);
 373
 374         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 375
 376         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 377
 378         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 379                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 380                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 381         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 382                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 383                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 384
 385         hw->wiphy->hw_version = mvm->trans->hw_id;
 386
 387         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 388                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 389         else
 390                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 391
 392         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 393                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 394                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 395                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 396                 /* we create the 802.11 header and zero length SSID IE. */
 397                 hw->wiphy->max_sched_scan_ie_len =
 398                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 399         }
 400
 401         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 402                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 403                                NL80211_FEATURE_P2P_GO_OPPPS |
 404                                NL80211_FEATURE_DYNAMIC_SMPS |
 405                                NL80211_FEATURE_STATIC_SMPS;
 406
 407         if (mvm->fw->ucode_capa.capa[0] &
 408             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 409                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 410         if (mvm->fw->ucode_capa.capa[0] &
 411             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 412                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 413
 414         if (mvm->fw->ucode_capa.capa[0] &
 415             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 416                 hw->wiphy->features |=
 417                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 418
 419         if (mvm->fw->ucode_capa.capa[0] &
 420             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 421                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 422
 423         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 424
 425         /* currently FW API supports only one optional cipher scheme */
 426         if (mvm->fw->cs[0].cipher) {
 427                 mvm->hw->n_cipher_schemes = 1;
 428                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 429         }
 430
 431 #ifdef CONFIG_PM_SLEEP
 432         if (iwl_mvm_is_d0i3_supported(mvm) &&
 433             device_can_wakeup(mvm->trans->dev)) {
 434                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 435                 hw->wiphy->wowlan = &mvm->wowlan;
 436         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 437             mvm->trans->ops->d3_suspend &&
 438             mvm->trans->ops->d3_resume &&
 439             device_can_wakeup(mvm->trans->dev)) {
 440                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 441                                     WIPHY_WOWLAN_DISCONNECT |
 442                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 443                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 444                 if (!iwlwifi_mod_params.sw_crypto)
 445                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 446                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 447                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 448
 449                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 450                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 451                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 452                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 453                 hw->wiphy->wowlan = &mvm->wowlan;
 454         }
 455 #endif
 456
 457 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 458         /* assign default bcast filtering configuration */
 459         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 460 #endif
 461
 462         ret = iwl_mvm_leds_init(mvm);
 463         if (ret)
 464                 return ret;
 465
 466         ret = ieee80211_register_hw(mvm->hw);
 467         if (ret)
 468                 iwl_mvm_leds_exit(mvm);
 469
 470         return ret;
 471 }
 472
 473 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 474                              struct ieee80211_sta *sta,
 475                              struct sk_buff *skb)
 476 {
 477         struct iwl_mvm_sta *mvmsta;
 478         bool defer = false;
 479
 480         /*
 481          * double check the IN_D0I3 flag both before and after
 482          * taking the spinlock, in order to prevent taking
 483          * the spinlock when not needed.
 484          */
 485         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 486                 return false;
 487
 488         spin_lock(&mvm->d0i3_tx_lock);
 489         /*
 490          * testing the flag again ensures the skb dequeue
 491          * loop (on d0i3 exit) hasn't run yet.
 492          */
 493         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 494                 goto out;
 495
 496         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 497         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 498             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 499                 goto out;
 500
 501         __skb_queue_tail(&mvm->d0i3_tx, skb);
 502         ieee80211_stop_queues(mvm->hw);
 503
 504         /* trigger wakeup */
 505         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 506         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 507
 508         defer = true;
 509 out:
 510         spin_unlock(&mvm->d0i3_tx_lock);
 511         return defer;
 512 }
 513
 514 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 515                            struct ieee80211_tx_control *control,
 516                            struct sk_buff *skb)
 517 {
 518         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 519         struct ieee80211_sta *sta = control->sta;
 520         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 521         struct ieee80211_hdr *hdr = (void *)skb->data;
 522
 523         if (iwl_mvm_is_radio_killed(mvm)) {
 524                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 525                 goto drop;
 526         }
 527
 528         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 529             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 530             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 531                 goto drop;
 532
 533         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 534         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 535                      ieee80211_is_mgmt(hdr->frame_control) &&
 536                      !ieee80211_is_deauth(hdr->frame_control) &&
 537                      !ieee80211_is_disassoc(hdr->frame_control) &&
 538                      !ieee80211_is_action(hdr->frame_control)))
 539                 sta = NULL;
 540
 541         if (sta) {
 542                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 543                         return;
 544                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 545                         goto drop;
 546                 return;
 547         }
 548
 549         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 550                 goto drop;
 551         return;
 552  drop:
 553         ieee80211_free_txskb(hw, skb);
 554 }
 555
 556 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 557 {
 558         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 559                 return false;
 560         return true;
 561 }
 562
 563 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 564 {
 565         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 566                 return false;
 567         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 568                 return true;
 569
 570         /* enabled by default */
 571         return true;
 572 }
 573
 574 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 575                                     struct ieee80211_vif *vif,
 576                                     enum ieee80211_ampdu_mlme_action action,
 577                                     struct ieee80211_sta *sta, u16 tid,
 578                                     u16 *ssn, u8 buf_size)
 579 {
 580         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 581         int ret;
 582         bool tx_agg_ref = false;
 583
 584         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 585                      sta->addr, tid, action);
 586
 587         if (!(mvm->nvm_data->sku_cap_11n_enable))
 588                 return -EACCES;
 589
 590         /* return from D0i3 before starting a new Tx aggregation */
 591         switch (action) {
 592         case IEEE80211_AMPDU_TX_START:
 593         case IEEE80211_AMPDU_TX_STOP_CONT:
 594         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 595         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 596         case IEEE80211_AMPDU_TX_OPERATIONAL:
 597                 /*
 598                  * for tx start, wait synchronously until D0i3 exit to
 599                  * get the correct sequence number for the tid.
 600                  * additionally, some other ampdu actions use direct
 601                  * target access, which is not handled automatically
 602                  * by the trans layer (unlike commands), so wait for
 603                  * d0i3 exit in these cases as well.
 604                  */
 605                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 606                 if (ret)
 607                         return ret;
 608
 609                 tx_agg_ref = true;
 610                 break;
 611         default:
 612                 break;
 613         }
 614
 615         mutex_lock(&mvm->mutex);
 616
 617         switch (action) {
 618         case IEEE80211_AMPDU_RX_START:
 619                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 620                         ret = -EINVAL;
 621                         break;
 622                 }
 623                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 624                 break;
 625         case IEEE80211_AMPDU_RX_STOP:
 626                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 627                 break;
 628         case IEEE80211_AMPDU_TX_START:
 629                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 630                         ret = -EINVAL;
 631                         break;
 632                 }
 633                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 634                 break;
 635         case IEEE80211_AMPDU_TX_STOP_CONT:
 636                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 637                 break;
 638         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 639         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 640                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 641                 break;
 642         case IEEE80211_AMPDU_TX_OPERATIONAL:
 643                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 644                 break;
 645         default:
 646                 WARN_ON_ONCE(1);
 647                 ret = -EINVAL;
 648                 break;
 649         }
 650         mutex_unlock(&mvm->mutex);
 651
 652         /*
 653          * If the tid is marked as started, we won't use it for offloaded
 654          * traffic on the next D0i3 entry. It's safe to unref.
 655          */
 656         if (tx_agg_ref)
 657                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 658
 659         return ret;
 660 }
 661
 662 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 663                                      struct ieee80211_vif *vif)
 664 {
 665         struct iwl_mvm *mvm = data;
 666         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 667
 668         mvmvif->uploaded = false;
 669         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 670
 671         /* does this make sense at all? */
 672         mvmvif->color++;
 673
 674         spin_lock_bh(&mvm->time_event_lock);
 675         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 676         spin_unlock_bh(&mvm->time_event_lock);
 677
 678         mvmvif->phy_ctxt = NULL;
 679         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 680 }
 681
 682 #ifdef CONFIG_IWLWIFI_DEBUGFS
 683 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 684 {
 685         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 686         struct iwl_fw_error_dump_file *dump_file;
 687         struct iwl_fw_error_dump_data *dump_data;
 688         struct iwl_fw_error_dump_info *dump_info;
 689         struct iwl_mvm_dump_ptrs *fw_error_dump;
 690         const struct fw_img *img;
 691         u32 sram_len, sram_ofs;
 692         u32 file_len, rxf_len;
 693         unsigned long flags;
 694         int reg_val;
 695
 696         lockdep_assert_held(&mvm->mutex);
 697
 698         if (mvm->fw_error_dump)
 699                 return;
 700
 701         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 702         if (!fw_error_dump)
 703                 return;
 704
 705         img = &mvm->fw->img[mvm->cur_ucode];
 706         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 707         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 708
 709         /* reading buffer size */
 710         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 711         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 712
 713         /* the register holds the value divided by 128 */
 714         rxf_len = rxf_len << 7;
 715
 716         file_len = sizeof(*dump_file) +
 717                    sizeof(*dump_data) * 3 +
 718                    sram_len +
 719                    rxf_len +
 720                    sizeof(*dump_info);
 721
 722         dump_file = vzalloc(file_len);
 723         if (!dump_file) {
 724                 kfree(fw_error_dump);
 725                 return;
 726         }
 727
 728         fw_error_dump->op_mode_ptr = dump_file;
 729
 730         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 731         dump_data = (void *)dump_file->data;
 732
 733         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 734         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 735         dump_info = (void *) dump_data->data;
 736         dump_info->device_family =
 737                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 738                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 739                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 740         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 741                sizeof(dump_info->fw_human_readable));
 742         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 743                 sizeof(dump_info->dev_human_readable));
 744         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 745                 sizeof(dump_info->bus_human_readable));
 746
 747         dump_data = iwl_fw_error_next_data(dump_data);
 748         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 749         dump_data->len = cpu_to_le32(rxf_len);
 750
 751         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 752                 u32 *rxf = (void *)dump_data->data;
 753                 int i;
 754
 755                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 756                         iwl_trans_write_prph(mvm->trans,
 757                                              RXF_LD_FENCE_OFFSET_ADDR,
 758                                              i * sizeof(u32));
 759                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 760                                                      RXF_FIFO_RD_FENCE_ADDR);
 761                 }
 762                 iwl_trans_release_nic_access(mvm->trans, &flags);
 763         }
 764
 765         dump_data = iwl_fw_error_next_data(dump_data);
 766         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 767         dump_data->len = cpu_to_le32(sram_len);
 768         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 769                                  sram_len);
 770
 771         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 772         fw_error_dump->op_mode_len = file_len;
 773         if (fw_error_dump->trans_ptr)
 774                 file_len += fw_error_dump->trans_ptr->len;
 775         dump_file->file_len = cpu_to_le32(file_len);
 776         mvm->fw_error_dump = fw_error_dump;
 777
 778         /* notify the userspace about the error we had */
 779         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 780 }
 781 #endif
 782
 783 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 784 {
 785         iwl_mvm_fw_error_dump(mvm);
 786
 787         iwl_trans_stop_device(mvm->trans);
 788
 789         mvm->scan_status = IWL_MVM_SCAN_NONE;
 790         mvm->ps_disabled = false;
 791
 792         /* just in case one was running */
 793         ieee80211_remain_on_channel_expired(mvm->hw);
 794
 795         ieee80211_iterate_active_interfaces_atomic(
 796                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 797                 iwl_mvm_cleanup_iterator, mvm);
 798
 799         mvm->p2p_device_vif = NULL;
 800         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 801
 802         iwl_mvm_reset_phy_ctxts(mvm);
 803         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 804         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 805         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 806         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
 807         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
 808         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
 809         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
 810         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
 811
 812         ieee80211_wake_queues(mvm->hw);
 813
 814         /* cleanup all stale references (scan, roc), but keep the
 815          * ucode_down ref until reconfig is complete */
 816         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 817
 818         /* clear any stale d0i3 state */
 819         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
 820
 821         mvm->vif_count = 0;
 822         mvm->rx_ba_sessions = 0;
 823 }
 824
 825 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
 826 {
 827         int ret;
 828
 829         lockdep_assert_held(&mvm->mutex);
 830
 831         /* Clean up some internal and mac80211 state on restart */
 832         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 833                 iwl_mvm_restart_cleanup(mvm);
 834
 835         ret = iwl_mvm_up(mvm);
 836
 837         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 838                 /* Something went wrong - we need to finish some cleanup
 839                  * that normally iwl_mvm_mac_restart_complete() below
 840                  * would do.
 841                  */
 842                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 843                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 844         }
 845
 846         return ret;
 847 }
 848
 849 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 850 {
 851         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 852         int ret;
 853
 854         mutex_lock(&mvm->mutex);
 855         ret = __iwl_mvm_mac_start(mvm);
 856         mutex_unlock(&mvm->mutex);
 857
 858         return ret;
 859 }
 860
 861 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 862 {
 863         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 864         int ret;
 865
 866         mutex_lock(&mvm->mutex);
 867
 868         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 869         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 870         ret = iwl_mvm_update_quotas(mvm, NULL);
 871         if (ret)
 872                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 873                         ret);
 874
 875         /* allow transport/FW low power modes */
 876         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 877
 878         mutex_unlock(&mvm->mutex);
 879 }
 880
 881 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
 882 {
 883         lockdep_assert_held(&mvm->mutex);
 884
 885         /* disallow low power states when the FW is down */
 886         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 887
 888         /* async_handlers_wk is now blocked */
 889
 890         /*
 891          * The work item could be running or queued if the
 892          * ROC time event stops just as we get here.
 893          */
 894         cancel_work_sync(&mvm->roc_done_wk);
 895
 896         iwl_trans_stop_device(mvm->trans);
 897
 898         iwl_mvm_async_handlers_purge(mvm);
 899         /* async_handlers_list is empty and will stay empty: HW is stopped */
 900
 901         /* the fw is stopped, the aux sta is dead: clean up driver state */
 902         iwl_mvm_del_aux_sta(mvm);
 903
 904         mvm->ucode_loaded = false;
 905 }
 906
 907 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 908 {
 909         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 910
 911         flush_work(&mvm->d0i3_exit_work);
 912         flush_work(&mvm->async_handlers_wk);
 913         flush_work(&mvm->fw_error_dump_wk);
 914
 915         mutex_lock(&mvm->mutex);
 916         __iwl_mvm_mac_stop(mvm);
 917         mutex_unlock(&mvm->mutex);
 918
 919         /*
 920          * The worker might have been waiting for the mutex, let it run and
 921          * discover that its list is now empty.
 922          */
 923         cancel_work_sync(&mvm->async_handlers_wk);
 924 }
 925
 926 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 927 {
 928         u16 i;
 929
 930         lockdep_assert_held(&mvm->mutex);
 931
 932         for (i = 0; i < NUM_PHY_CTX; i++)
 933                 if (!mvm->phy_ctxts[i].ref)
 934                         return &mvm->phy_ctxts[i];
 935
 936         IWL_ERR(mvm, "No available PHY context\n");
 937         return NULL;
 938 }
 939
 940 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 941                                 s8 tx_power)
 942 {
 943         /* FW is in charge of regulatory enforcement */
 944         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 945                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 946                 .pwr_restriction = cpu_to_le16(tx_power),
 947         };
 948
 949         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 950                                     sizeof(reduce_txpwr_cmd),
 951                                     &reduce_txpwr_cmd);
 952 }
 953
 954 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 955                                      struct ieee80211_vif *vif)
 956 {
 957         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 958         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 959         int ret;
 960
 961         /*
 962          * make sure D0i3 exit is completed, otherwise a target access
 963          * during tx queue configuration could be done when still in
 964          * D0i3 state.
 965          */
 966         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 967         if (ret)
 968                 return ret;
 969
 970         /*
 971          * Not much to do here. The stack will not allow interface
 972          * types or combinations that we didn't advertise, so we
 973          * don't really have to check the types.
 974          */
 975
 976         mutex_lock(&mvm->mutex);
 977
 978         /* Allocate resources for the MAC context, and add it to the fw  */
 979         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 980         if (ret)
 981                 goto out_unlock;
 982
 983         /* Counting number of interfaces is needed for legacy PM */
 984         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 985                 mvm->vif_count++;
 986
 987         /*
 988          * The AP binding flow can be done only after the beacon
 989          * template is configured (which happens only in the mac80211
 990          * start_ap() flow), and adding the broadcast station can happen
 991          * only after the binding.
 992          * In addition, since modifying the MAC before adding a bcast
 993          * station is not allowed by the FW, delay the adding of MAC context to
 994          * the point where we can also add the bcast station.
 995          * In short: there's not much we can do at this point, other than
 996          * allocating resources :)
 997          */
 998         if (vif->type == NL80211_IFTYPE_AP ||
 999             vif->type == NL80211_IFTYPE_ADHOC) {
1000                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1001                 if (ret) {
1002                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1003                         goto out_release;
1004                 }
1005
1006                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1007                 goto out_unlock;
1008         }
1009
1010         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1011         if (ret)
1012                 goto out_release;
1013
1014         ret = iwl_mvm_power_update_mac(mvm);
1015         if (ret)
1016                 goto out_release;
1017
1018         /* beacon filtering */
1019         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1020         if (ret)
1021                 goto out_remove_mac;
1022
1023         if (!mvm->bf_allowed_vif &&
1024             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1025                 mvm->bf_allowed_vif = mvmvif;
1026                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1027                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1028         }
1029
1030         /*
1031          * P2P_DEVICE interface does not have a channel context assigned to it,
1032          * so a dedicated PHY context is allocated to it and the corresponding
1033          * MAC context is bound to it at this stage.
1034          */
1035         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1036
1037                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1038                 if (!mvmvif->phy_ctxt) {
1039                         ret = -ENOSPC;
1040                         goto out_free_bf;
1041                 }
1042
1043                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1044                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1045                 if (ret)
1046                         goto out_unref_phy;
1047
1048                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1049                 if (ret)
1050                         goto out_unbind;
1051
1052                 /* Save a pointer to p2p device vif, so it can later be used to
1053                  * update the p2p device MAC when a GO is started/stopped */
1054                 mvm->p2p_device_vif = vif;
1055         }
1056
1057         iwl_mvm_vif_dbgfs_register(mvm, vif);
1058         goto out_unlock;
1059
1060  out_unbind:
1061         iwl_mvm_binding_remove_vif(mvm, vif);
1062  out_unref_phy:
1063         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1064  out_free_bf:
1065         if (mvm->bf_allowed_vif == mvmvif) {
1066                 mvm->bf_allowed_vif = NULL;
1067                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1068                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1069         }
1070  out_remove_mac:
1071         mvmvif->phy_ctxt = NULL;
1072         iwl_mvm_mac_ctxt_remove(mvm, vif);
1073  out_release:
1074         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1075                 mvm->vif_count--;
1076
1077         iwl_mvm_mac_ctxt_release(mvm, vif);
1078  out_unlock:
1079         mutex_unlock(&mvm->mutex);
1080
1081         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1082
1083         return ret;
1084 }
1085
1086 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1087                                         struct ieee80211_vif *vif)
1088 {
1089         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(mvm, vif);
1090
1091         if (tfd_msk) {
1092                 mutex_lock(&mvm->mutex);
1093                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1094                 mutex_unlock(&mvm->mutex);
1095         }
1096
1097         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1098                 /*
1099                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1100                  * We assume here that all the packets sent to the OFFCHANNEL
1101                  * queue are sent in ROC session.
1102                  */
1103                 flush_work(&mvm->roc_done_wk);
1104         } else {
1105                 /*
1106                  * By now, all the AC queues are empty. The AGG queues are
1107                  * empty too. We already got all the Tx responses for all the
1108                  * packets in the queues. The drain work can have been
1109                  * triggered. Flush it.
1110                  */
1111                 flush_work(&mvm->sta_drained_wk);
1112         }
1113 }
1114
1115 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1116                                          struct ieee80211_vif *vif)
1117 {
1118         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1119         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1120
1121         iwl_mvm_prepare_mac_removal(mvm, vif);
1122
1123         mutex_lock(&mvm->mutex);
1124
1125         if (mvm->bf_allowed_vif == mvmvif) {
1126                 mvm->bf_allowed_vif = NULL;
1127                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1128                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1129         }
1130
1131         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1132
1133         /*
1134          * For AP/GO interface, the tear down of the resources allocated to the
1135          * interface is be handled as part of the stop_ap flow.
1136          */
1137         if (vif->type == NL80211_IFTYPE_AP ||
1138             vif->type == NL80211_IFTYPE_ADHOC) {
1139 #ifdef CONFIG_NL80211_TESTMODE
1140                 if (vif == mvm->noa_vif) {
1141                         mvm->noa_vif = NULL;
1142                         mvm->noa_duration = 0;
1143                 }
1144 #endif
1145                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1146                 goto out_release;
1147         }
1148
1149         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1150                 mvm->p2p_device_vif = NULL;
1151                 iwl_mvm_rm_bcast_sta(mvm, vif);
1152                 iwl_mvm_binding_remove_vif(mvm, vif);
1153                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1154                 mvmvif->phy_ctxt = NULL;
1155         }
1156
1157         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1158                 mvm->vif_count--;
1159
1160         iwl_mvm_power_update_mac(mvm);
1161         iwl_mvm_mac_ctxt_remove(mvm, vif);
1162
1163 out_release:
1164         iwl_mvm_mac_ctxt_release(mvm, vif);
1165         mutex_unlock(&mvm->mutex);
1166 }
1167
1168 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1169 {
1170         return 0;
1171 }
1172
1173 struct iwl_mvm_mc_iter_data {
1174         struct iwl_mvm *mvm;
1175         int port_id;
1176 };
1177
1178 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1179                                       struct ieee80211_vif *vif)
1180 {
1181         struct iwl_mvm_mc_iter_data *data = _data;
1182         struct iwl_mvm *mvm = data->mvm;
1183         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1184         int ret, len;
1185
1186         /* if we don't have free ports, mcast frames will be dropped */
1187         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1188                 return;
1189
1190         if (vif->type != NL80211_IFTYPE_STATION ||
1191             !vif->bss_conf.assoc)
1192                 return;
1193
1194         cmd->port_id = data->port_id++;
1195         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1196         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1197
1198         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1199         if (ret)
1200                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1201 }
1202
1203 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1204 {
1205         struct iwl_mvm_mc_iter_data iter_data = {
1206                 .mvm = mvm,
1207         };
1208
1209         lockdep_assert_held(&mvm->mutex);
1210
1211         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1212                 return;
1213
1214         ieee80211_iterate_active_interfaces_atomic(
1215                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1216                 iwl_mvm_mc_iface_iterator, &iter_data);
1217 }
1218
1219 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1220                                      struct netdev_hw_addr_list *mc_list)
1221 {
1222         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1223         struct iwl_mcast_filter_cmd *cmd;
1224         struct netdev_hw_addr *addr;
1225         int addr_count;
1226         bool pass_all;
1227         int len;
1228
1229         addr_count = netdev_hw_addr_list_count(mc_list);
1230         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1231                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1232         if (pass_all)
1233                 addr_count = 0;
1234
1235         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1236         cmd = kzalloc(len, GFP_ATOMIC);
1237         if (!cmd)
1238                 return 0;
1239
1240         if (pass_all) {
1241                 cmd->pass_all = 1;
1242                 return (u64)(unsigned long)cmd;
1243         }
1244
1245         netdev_hw_addr_list_for_each(addr, mc_list) {
1246                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1247                                    cmd->count, addr->addr);
1248                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1249                        addr->addr, ETH_ALEN);
1250                 cmd->count++;
1251         }
1252
1253         return (u64)(unsigned long)cmd;
1254 }
1255
1256 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1257                                      unsigned int changed_flags,
1258                                      unsigned int *total_flags,
1259                                      u64 multicast)
1260 {
1261         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1262         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1263
1264         mutex_lock(&mvm->mutex);
1265
1266         /* replace previous configuration */
1267         kfree(mvm->mcast_filter_cmd);
1268         mvm->mcast_filter_cmd = cmd;
1269
1270         if (!cmd)
1271                 goto out;
1272
1273         iwl_mvm_recalc_multicast(mvm);
1274 out:
1275         mutex_unlock(&mvm->mutex);
1276         *total_flags = 0;
1277 }
1278
1279 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1280 struct iwl_bcast_iter_data {
1281         struct iwl_mvm *mvm;
1282         struct iwl_bcast_filter_cmd *cmd;
1283         u8 current_filter;
1284 };
1285
1286 static void
1287 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1288                          const struct iwl_fw_bcast_filter *in_filter,
1289                          struct iwl_fw_bcast_filter *out_filter)
1290 {
1291         struct iwl_fw_bcast_filter_attr *attr;
1292         int i;
1293
1294         memcpy(out_filter, in_filter, sizeof(*out_filter));
1295
1296         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1297                 attr = &out_filter->attrs[i];
1298
1299                 if (!attr->mask)
1300                         break;
1301
1302                 switch (attr->reserved1) {
1303                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1304                         if (vif->bss_conf.arp_addr_cnt != 1) {
1305                                 attr->mask = 0;
1306                                 continue;
1307                         }
1308
1309                         attr->val = vif->bss_conf.arp_addr_list[0];
1310                         break;
1311                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1312                         attr->val = *(__be32 *)&vif->addr[2];
1313                         break;
1314                 default:
1315                         break;
1316                 }
1317                 attr->reserved1 = 0;
1318                 out_filter->num_attrs++;
1319         }
1320 }
1321
1322 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1323                                           struct ieee80211_vif *vif)
1324 {
1325         struct iwl_bcast_iter_data *data = _data;
1326         struct iwl_mvm *mvm = data->mvm;
1327         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1328         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1329         struct iwl_fw_bcast_mac *bcast_mac;
1330         int i;
1331
1332         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1333                 return;
1334
1335         bcast_mac = &cmd->macs[mvmvif->id];
1336
1337         /*
1338          * enable filtering only for associated stations, but not for P2P
1339          * Clients
1340          */
1341         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1342             !vif->bss_conf.assoc)
1343                 return;
1344
1345         bcast_mac->default_discard = 1;
1346
1347         /* copy all configured filters */
1348         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1349                 /*
1350                  * Make sure we don't exceed our filters limit.
1351                  * if there is still a valid filter to be configured,
1352                  * be on the safe side and just allow bcast for this mac.
1353                  */
1354                 if (WARN_ON_ONCE(data->current_filter >=
1355                                  ARRAY_SIZE(cmd->filters))) {
1356                         bcast_mac->default_discard = 0;
1357                         bcast_mac->attached_filters = 0;
1358                         break;
1359                 }
1360
1361                 iwl_mvm_set_bcast_filter(vif,
1362                                          &mvm->bcast_filters[i],
1363                                          &cmd->filters[data->current_filter]);
1364
1365                 /* skip current filter if it contains no attributes */
1366                 if (!cmd->filters[data->current_filter].num_attrs)
1367                         continue;
1368
1369                 /* attach the filter to current mac */
1370                 bcast_mac->attached_filters |=
1371                                 cpu_to_le16(BIT(data->current_filter));
1372
1373                 data->current_filter++;
1374         }
1375 }
1376
1377 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1378                                     struct iwl_bcast_filter_cmd *cmd)
1379 {
1380         struct iwl_bcast_iter_data iter_data = {
1381                 .mvm = mvm,
1382                 .cmd = cmd,
1383         };
1384
1385         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1386                 return false;
1387
1388         memset(cmd, 0, sizeof(*cmd));
1389         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1390         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1391
1392 #ifdef CONFIG_IWLWIFI_DEBUGFS
1393         /* use debugfs filters/macs if override is configured */
1394         if (mvm->dbgfs_bcast_filtering.override) {
1395                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1396                        sizeof(cmd->filters));
1397                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1398                        sizeof(cmd->macs));
1399                 return true;
1400         }
1401 #endif
1402
1403         /* if no filters are configured, do nothing */
1404         if (!mvm->bcast_filters)
1405                 return false;
1406
1407         /* configure and attach these filters for each associated sta vif */
1408         ieee80211_iterate_active_interfaces(
1409                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1410                 iwl_mvm_bcast_filter_iterator, &iter_data);
1411
1412         return true;
1413 }
1414 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1415                                           struct ieee80211_vif *vif)
1416 {
1417         struct iwl_bcast_filter_cmd cmd;
1418
1419         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1420                 return 0;
1421
1422         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1423                 return 0;
1424
1425         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1426                                     sizeof(cmd), &cmd);
1427 }
1428 #else
1429 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1430                                                  struct ieee80211_vif *vif)
1431 {
1432         return 0;
1433 }
1434 #endif
1435
1436 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1437                                              struct ieee80211_vif *vif,
1438                                              struct ieee80211_bss_conf *bss_conf,
1439                                              u32 changes)
1440 {
1441         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1442         int ret;
1443
1444         /*
1445          * Re-calculate the tsf id, as the master-slave relations depend on the
1446          * beacon interval, which was not known when the station interface was
1447          * added.
1448          */
1449         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1450                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1451
1452         /*
1453          * If we're not associated yet, take the (new) BSSID before associating
1454          * so the firmware knows. If we're already associated, then use the old
1455          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1456          * branch for disassociation below.
1457          */
1458         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1459                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1460
1461         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1462         if (ret)
1463                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1464
1465         /* after sending it once, adopt mac80211 data */
1466         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1467         mvmvif->associated = bss_conf->assoc;
1468
1469         if (changes & BSS_CHANGED_ASSOC) {
1470                 if (bss_conf->assoc) {
1471                         /* add quota for this interface */
1472                         ret = iwl_mvm_update_quotas(mvm, NULL);
1473                         if (ret) {
1474                                 IWL_ERR(mvm, "failed to update quotas\n");
1475                                 return;
1476                         }
1477
1478                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1479                                      &mvm->status)) {
1480                                 /*
1481                                  * If we're restarting then the firmware will
1482                                  * obviously have lost synchronisation with
1483                                  * the AP. It will attempt to synchronise by
1484                                  * itself, but we can make it more reliable by
1485                                  * scheduling a session protection time event.
1486                                  *
1487                                  * The firmware needs to receive a beacon to
1488                                  * catch up with synchronisation, use 110% of
1489                                  * the beacon interval.
1490                                  *
1491                                  * Set a large maximum delay to allow for more
1492                                  * than a single interface.
1493                                  */
1494                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1495                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1496                                                         5 * dur, false);
1497                         }
1498
1499                         iwl_mvm_sf_update(mvm, vif, false);
1500                         iwl_mvm_power_vif_assoc(mvm, vif);
1501                         if (vif->p2p) {
1502                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1503                                 iwl_mvm_update_smps(mvm, vif,
1504                                                     IWL_MVM_SMPS_REQ_PROT,
1505                                                     IEEE80211_SMPS_DYNAMIC);
1506                         }
1507                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1508                         /*
1509                          * If update fails - SF might be running in associated
1510                          * mode while disassociated - which is forbidden.
1511                          */
1512                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1513                                   "Failed to update SF upon disassociation\n");
1514
1515                         /* remove AP station now that the MAC is unassoc */
1516                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1517                         if (ret)
1518                                 IWL_ERR(mvm, "failed to remove AP station\n");
1519
1520                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1521                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1522                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1523                         /* remove quota for this interface */
1524                         ret = iwl_mvm_update_quotas(mvm, NULL);
1525                         if (ret)
1526                                 IWL_ERR(mvm, "failed to update quotas\n");
1527
1528                         if (vif->p2p)
1529                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1530
1531                         /* this will take the cleared BSSID from bss_conf */
1532                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1533                         if (ret)
1534                                 IWL_ERR(mvm,
1535                                         "failed to update MAC %pM (clear after unassoc)\n",
1536                                         vif->addr);
1537                 }
1538
1539                 iwl_mvm_recalc_multicast(mvm);
1540                 iwl_mvm_configure_bcast_filter(mvm, vif);
1541
1542                 /* reset rssi values */
1543                 mvmvif->bf_data.ave_beacon_signal = 0;
1544
1545                 iwl_mvm_bt_coex_vif_change(mvm);
1546                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1547                                     IEEE80211_SMPS_AUTOMATIC);
1548         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1549                 /*
1550                  * We received a beacon _after_ association so
1551                  * remove the session protection.
1552                  */
1553                 iwl_mvm_remove_time_event(mvm, mvmvif,
1554                                           &mvmvif->time_event_data);
1555         }
1556
1557         if (changes & BSS_CHANGED_BEACON_INFO) {
1558                 iwl_mvm_sf_update(mvm, vif, false);
1559                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1560         }
1561
1562         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1563                 ret = iwl_mvm_power_update_mac(mvm);
1564                 if (ret)
1565                         IWL_ERR(mvm, "failed to update power mode\n");
1566         }
1567
1568         if (changes & BSS_CHANGED_TXPOWER) {
1569                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1570                                 bss_conf->txpower);
1571                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1572         }
1573
1574         if (changes & BSS_CHANGED_CQM) {
1575                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1576                 /* reset cqm events tracking */
1577                 mvmvif->bf_data.last_cqm_event = 0;
1578                 if (mvmvif->bf_data.bf_enabled) {
1579                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1580                         if (ret)
1581                                 IWL_ERR(mvm,
1582                                         "failed to update CQM thresholds\n");
1583                 }
1584         }
1585
1586         if (changes & BSS_CHANGED_ARP_FILTER) {
1587                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1588                 iwl_mvm_configure_bcast_filter(mvm, vif);
1589         }
1590 }
1591
1592 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1593                                  struct ieee80211_vif *vif)
1594 {
1595         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1596         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1597         int ret;
1598
1599         /*
1600          * iwl_mvm_mac_ctxt_add() might read directly from the device
1601          * (the system time), so make sure it is available.
1602          */
1603         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1604         if (ret)
1605                 return ret;
1606
1607         mutex_lock(&mvm->mutex);
1608
1609         /* Send the beacon template */
1610         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1611         if (ret)
1612                 goto out_unlock;
1613
1614         /*
1615          * Re-calculate the tsf id, as the master-slave relations depend on the
1616          * beacon interval, which was not known when the AP interface was added.
1617          */
1618         if (vif->type == NL80211_IFTYPE_AP)
1619                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1620
1621         /* Add the mac context */
1622         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1623         if (ret)
1624                 goto out_unlock;
1625
1626         /* Perform the binding */
1627         ret = iwl_mvm_binding_add_vif(mvm, vif);
1628         if (ret)
1629                 goto out_remove;
1630
1631         /* Send the bcast station. At this stage the TBTT and DTIM time events
1632          * are added and applied to the scheduler */
1633         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1634         if (ret)
1635                 goto out_unbind;
1636
1637         /* must be set before quota calculations */
1638         mvmvif->ap_ibss_active = true;
1639
1640         /* power updated needs to be done before quotas */
1641         iwl_mvm_power_update_mac(mvm);
1642
1643         ret = iwl_mvm_update_quotas(mvm, NULL);
1644         if (ret)
1645                 goto out_quota_failed;
1646
1647         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1648         if (vif->p2p && mvm->p2p_device_vif)
1649                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1650
1651         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1652
1653         iwl_mvm_bt_coex_vif_change(mvm);
1654
1655         /* we don't support TDLS during DCM */
1656         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1657                 iwl_mvm_teardown_tdls_peers(mvm);
1658
1659         mutex_unlock(&mvm->mutex);
1660         return 0;
1661
1662 out_quota_failed:
1663         iwl_mvm_power_update_mac(mvm);
1664         mvmvif->ap_ibss_active = false;
1665         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1666 out_unbind:
1667         iwl_mvm_binding_remove_vif(mvm, vif);
1668 out_remove:
1669         iwl_mvm_mac_ctxt_remove(mvm, vif);
1670 out_unlock:
1671         mutex_unlock(&mvm->mutex);
1672         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1673         return ret;
1674 }
1675
1676 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1677                                  struct ieee80211_vif *vif)
1678 {
1679         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1680         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1681
1682         iwl_mvm_prepare_mac_removal(mvm, vif);
1683
1684         mutex_lock(&mvm->mutex);
1685
1686         /* Handle AP stop while in CSA */
1687         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1688                 iwl_mvm_remove_time_event(mvm, mvmvif,
1689                                           &mvmvif->time_event_data);
1690                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1691         }
1692
1693         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1694                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1695                 mvm->csa_tx_block_bcn_timeout = 0;
1696         }
1697
1698         mvmvif->ap_ibss_active = false;
1699         mvm->ap_last_beacon_gp2 = 0;
1700
1701         iwl_mvm_bt_coex_vif_change(mvm);
1702
1703         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1704
1705         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1706         if (vif->p2p && mvm->p2p_device_vif)
1707                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1708
1709         iwl_mvm_update_quotas(mvm, NULL);
1710         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1711         iwl_mvm_binding_remove_vif(mvm, vif);
1712
1713         iwl_mvm_power_update_mac(mvm);
1714
1715         iwl_mvm_mac_ctxt_remove(mvm, vif);
1716
1717         mutex_unlock(&mvm->mutex);
1718 }
1719
1720 static void
1721 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1722                                  struct ieee80211_vif *vif,
1723                                  struct ieee80211_bss_conf *bss_conf,
1724                                  u32 changes)
1725 {
1726         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1727
1728         /* Changes will be applied when the AP/IBSS is started */
1729         if (!mvmvif->ap_ibss_active)
1730                 return;
1731
1732         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1733                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1734             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1735                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1736
1737         /* Need to send a new beacon template to the FW */
1738         if (changes & BSS_CHANGED_BEACON &&
1739             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1740                 IWL_WARN(mvm, "Failed updating beacon data\n");
1741
1742         if (changes & BSS_CHANGED_TXPOWER) {
1743                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1744                                 bss_conf->txpower);
1745                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1746         }
1747
1748 }
1749
1750 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1751                                      struct ieee80211_vif *vif,
1752                                      struct ieee80211_bss_conf *bss_conf,
1753                                      u32 changes)
1754 {
1755         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1756
1757         /*
1758          * iwl_mvm_bss_info_changed_station() might call
1759          * iwl_mvm_protect_session(), which reads directly from
1760          * the device (the system time), so make sure it is available.
1761          */
1762         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1763                 return;
1764
1765         mutex_lock(&mvm->mutex);
1766
1767         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1768                 iwl_mvm_scan_offload_stop(mvm, true);
1769
1770         switch (vif->type) {
1771         case NL80211_IFTYPE_STATION:
1772                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1773                 break;
1774         case NL80211_IFTYPE_AP:
1775         case NL80211_IFTYPE_ADHOC:
1776                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1777                 break;
1778         default:
1779                 /* shouldn't happen */
1780                 WARN_ON_ONCE(1);
1781         }
1782
1783         mutex_unlock(&mvm->mutex);
1784         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1785 }
1786
1787 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1788                                           enum iwl_scan_status scan_type)
1789 {
1790         int ret;
1791         bool wait_for_handlers = false;
1792
1793         mutex_lock(&mvm->mutex);
1794
1795         if (mvm->scan_status != scan_type) {
1796                 ret = 0;
1797                 /* make sure there are no pending notifications */
1798                 wait_for_handlers = true;
1799                 goto out;
1800         }
1801
1802         switch (scan_type) {
1803         case IWL_MVM_SCAN_SCHED:
1804                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1805                 break;
1806         case IWL_MVM_SCAN_OS:
1807                 ret = iwl_mvm_cancel_scan(mvm);
1808                 break;
1809         case IWL_MVM_SCAN_NONE:
1810         default:
1811                 WARN_ON_ONCE(1);
1812                 ret = -EINVAL;
1813                 break;
1814         }
1815         if (ret)
1816                 goto out;
1817
1818         wait_for_handlers = true;
1819 out:
1820         mutex_unlock(&mvm->mutex);
1821
1822         /* make sure we consume the completion notification */
1823         if (wait_for_handlers)
1824                 iwl_mvm_wait_for_async_handlers(mvm);
1825
1826         return ret;
1827 }
1828 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1829                                struct ieee80211_vif *vif,
1830                                struct ieee80211_scan_request *hw_req)
1831 {
1832         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1833         struct cfg80211_scan_request *req = &hw_req->req;
1834         int ret;
1835
1836         if (req->n_channels == 0 ||
1837             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1838                 return -EINVAL;
1839
1840         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1841         if (ret)
1842                 return ret;
1843
1844         mutex_lock(&mvm->mutex);
1845
1846         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1847                 ret = -EBUSY;
1848                 goto out;
1849         }
1850
1851         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1852
1853         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1854                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1855         else
1856                 ret = iwl_mvm_scan_request(mvm, vif, req);
1857
1858         if (ret)
1859                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1860 out:
1861         mutex_unlock(&mvm->mutex);
1862         return ret;
1863 }
1864
1865 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1866                                        struct ieee80211_vif *vif)
1867 {
1868         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1869
1870         mutex_lock(&mvm->mutex);
1871
1872         iwl_mvm_cancel_scan(mvm);
1873
1874         mutex_unlock(&mvm->mutex);
1875 }
1876
1877 static void
1878 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1879                                   struct ieee80211_sta *sta, u16 tids,
1880                                   int num_frames,
1881                                   enum ieee80211_frame_release_type reason,
1882                                   bool more_data)
1883 {
1884         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1885
1886         /* Called when we need to transmit (a) frame(s) from mac80211 */
1887
1888         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1889                                           tids, more_data, false);
1890 }
1891
1892 static void
1893 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1894                                     struct ieee80211_sta *sta, u16 tids,
1895                                     int num_frames,
1896                                     enum ieee80211_frame_release_type reason,
1897                                     bool more_data)
1898 {
1899         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1900
1901         /* Called when we need to transmit (a) frame(s) from agg queue */
1902
1903         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1904                                           tids, more_data, true);
1905 }
1906
1907 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1908                                    struct ieee80211_vif *vif,
1909                                    enum sta_notify_cmd cmd,
1910                                    struct ieee80211_sta *sta)
1911 {
1912         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1913         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1914         int tid;
1915
1916         switch (cmd) {
1917         case STA_NOTIFY_SLEEP:
1918                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1919                         ieee80211_sta_block_awake(hw, sta, true);
1920                 spin_lock_bh(&mvmsta->lock);
1921                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1922                         struct iwl_mvm_tid_data *tid_data;
1923
1924                         tid_data = &mvmsta->tid_data[tid];
1925                         if (tid_data->state != IWL_AGG_ON &&
1926                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1927                                 continue;
1928                         if (iwl_mvm_tid_queued(tid_data) == 0)
1929                                 continue;
1930                         ieee80211_sta_set_buffered(sta, tid, true);
1931                 }
1932                 spin_unlock_bh(&mvmsta->lock);
1933                 /*
1934                  * The fw updates the STA to be asleep. Tx packets on the Tx
1935                  * queues to this station will not be transmitted. The fw will
1936                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1937                  */
1938                 break;
1939         case STA_NOTIFY_AWAKE:
1940                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1941                         break;
1942                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1943                 break;
1944         default:
1945                 break;
1946         }
1947 }
1948
1949 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1950                                        struct ieee80211_vif *vif,
1951                                        struct ieee80211_sta *sta)
1952 {
1953         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1954         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1955
1956         /*
1957          * This is called before mac80211 does RCU synchronisation,
1958          * so here we already invalidate our internal RCU-protected
1959          * station pointer. The rest of the code will thus no longer
1960          * be able to find the station this way, and we don't rely
1961          * on further RCU synchronisation after the sta_state()
1962          * callback deleted the station.
1963          */
1964         mutex_lock(&mvm->mutex);
1965         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1966                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1967                                    ERR_PTR(-ENOENT));
1968         mutex_unlock(&mvm->mutex);
1969 }
1970
1971 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1972                                  struct ieee80211_vif *vif,
1973                                  struct ieee80211_sta *sta,
1974                                  enum ieee80211_sta_state old_state,
1975                                  enum ieee80211_sta_state new_state)
1976 {
1977         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1978         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1979         int ret;
1980
1981         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1982                            sta->addr, old_state, new_state);
1983
1984         /* this would be a mac80211 bug ... but don't crash */
1985         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1986                 return -EINVAL;
1987
1988         /* if a STA is being removed, reuse its ID */
1989         flush_work(&mvm->sta_drained_wk);
1990
1991         mutex_lock(&mvm->mutex);
1992         if (old_state == IEEE80211_STA_NOTEXIST &&
1993             new_state == IEEE80211_STA_NONE) {
1994                 /*
1995                  * Firmware bug - it'll crash if the beacon interval is less
1996                  * than 16. We can't avoid connecting at all, so refuse the
1997                  * station state change, this will cause mac80211 to abandon
1998                  * attempts to connect to this AP, and eventually wpa_s will
1999                  * blacklist the AP...
2000                  */
2001                 if (vif->type == NL80211_IFTYPE_STATION &&
2002                     vif->bss_conf.beacon_int < 16) {
2003                         IWL_ERR(mvm,
2004                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2005                                 sta->addr, vif->bss_conf.beacon_int);
2006                         ret = -EINVAL;
2007                         goto out_unlock;
2008                 }
2009
2010                 if (sta->tdls &&
2011                     (vif->p2p ||
2012                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2013                                                 IWL_MVM_TDLS_STA_COUNT ||
2014                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2015                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2016                         ret = -EBUSY;
2017                         goto out_unlock;
2018                 }
2019
2020                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2021                 if (sta->tdls && ret == 0)
2022                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2023         } else if (old_state == IEEE80211_STA_NONE &&
2024                    new_state == IEEE80211_STA_AUTH) {
2025                 /*
2026                  * EBS may be disabled due to previous failures reported by FW.
2027                  * Reset EBS status here assuming environment has been changed.
2028                  */
2029                 mvm->last_ebs_successful = true;
2030                 ret = 0;
2031         } else if (old_state == IEEE80211_STA_AUTH &&
2032                    new_state == IEEE80211_STA_ASSOC) {
2033                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2034                 if (ret == 0)
2035                         iwl_mvm_rs_rate_init(mvm, sta,
2036                                              mvmvif->phy_ctxt->channel->band,
2037                                              true);
2038         } else if (old_state == IEEE80211_STA_ASSOC &&
2039                    new_state == IEEE80211_STA_AUTHORIZED) {
2040
2041                 /* we don't support TDLS during DCM */
2042                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2043                         iwl_mvm_teardown_tdls_peers(mvm);
2044
2045                 /* enable beacon filtering */
2046                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2047                 ret = 0;
2048         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2049                    new_state == IEEE80211_STA_ASSOC) {
2050                 /* disable beacon filtering */
2051                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2052                 ret = 0;
2053         } else if (old_state == IEEE80211_STA_ASSOC &&
2054                    new_state == IEEE80211_STA_AUTH) {
2055                 ret = 0;
2056         } else if (old_state == IEEE80211_STA_AUTH &&
2057                    new_state == IEEE80211_STA_NONE) {
2058                 ret = 0;
2059         } else if (old_state == IEEE80211_STA_NONE &&
2060                    new_state == IEEE80211_STA_NOTEXIST) {
2061                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2062                 if (sta->tdls)
2063                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2064         } else {
2065                 ret = -EIO;
2066         }
2067  out_unlock:
2068         mutex_unlock(&mvm->mutex);
2069
2070         return ret;
2071 }
2072
2073 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2074 {
2075         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2076
2077         mvm->rts_threshold = value;
2078
2079         return 0;
2080 }
2081
2082 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2083                                   struct ieee80211_vif *vif,
2084                                   struct ieee80211_sta *sta, u32 changed)
2085 {
2086         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2087
2088         if (vif->type == NL80211_IFTYPE_STATION &&
2089             changed & IEEE80211_RC_NSS_CHANGED)
2090                 iwl_mvm_sf_update(mvm, vif, false);
2091 }
2092
2093 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2094                                struct ieee80211_vif *vif, u16 ac,
2095                                const struct ieee80211_tx_queue_params *params)
2096 {
2097         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2098         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2099
2100         mvmvif->queue_params[ac] = *params;
2101
2102         /*
2103          * No need to update right away, we'll get BSS_CHANGED_QOS
2104          * The exception is P2P_DEVICE interface which needs immediate update.
2105          */
2106         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2107                 int ret;
2108
2109                 mutex_lock(&mvm->mutex);
2110                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2111                 mutex_unlock(&mvm->mutex);
2112                 return ret;
2113         }
2114         return 0;
2115 }
2116
2117 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2118                                       struct ieee80211_vif *vif)
2119 {
2120         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2121         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2122                            200 + vif->bss_conf.beacon_int);
2123         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2124                                100 + vif->bss_conf.beacon_int);
2125
2126         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2127                 return;
2128
2129         /*
2130          * iwl_mvm_protect_session() reads directly from the device
2131          * (the system time), so make sure it is available.
2132          */
2133         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2134                 return;
2135
2136         mutex_lock(&mvm->mutex);
2137         /* Try really hard to protect the session and hear a beacon */
2138         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2139         mutex_unlock(&mvm->mutex);
2140
2141         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2142 }
2143
2144 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2145                                         struct ieee80211_vif *vif,
2146                                         struct cfg80211_sched_scan_request *req,
2147                                         struct ieee80211_scan_ies *ies)
2148 {
2149         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2150         int ret;
2151
2152         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2153         if (ret)
2154                 return ret;
2155
2156         mutex_lock(&mvm->mutex);
2157
2158         /* Newest FW fixes sched scan while connected on another interface */
2159         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2160                 if (!vif->bss_conf.idle) {
2161                         ret = -EBUSY;
2162                         goto out;
2163                 }
2164         } else if (!iwl_mvm_is_idle(mvm)) {
2165                 ret = -EBUSY;
2166                 goto out;
2167         }
2168
2169         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2170                 ret = -EBUSY;
2171                 goto out;
2172         }
2173
2174         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2175
2176         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2177         if (ret)
2178                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2179 out:
2180         mutex_unlock(&mvm->mutex);
2181         return ret;
2182 }
2183
2184 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2185                                        struct ieee80211_vif *vif)
2186 {
2187         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2188         int ret;
2189
2190         mutex_lock(&mvm->mutex);
2191         ret = iwl_mvm_scan_offload_stop(mvm, false);
2192         mutex_unlock(&mvm->mutex);
2193         iwl_mvm_wait_for_async_handlers(mvm);
2194
2195         return ret;
2196 }
2197
2198 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2199                                enum set_key_cmd cmd,
2200                                struct ieee80211_vif *vif,
2201                                struct ieee80211_sta *sta,
2202                                struct ieee80211_key_conf *key)
2203 {
2204         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2205         int ret;
2206
2207         if (iwlwifi_mod_params.sw_crypto) {
2208                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2209                 return -EOPNOTSUPP;
2210         }
2211
2212         switch (key->cipher) {
2213         case WLAN_CIPHER_SUITE_TKIP:
2214                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2215                 /* fall-through */
2216         case WLAN_CIPHER_SUITE_CCMP:
2217                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2218                 break;
2219         case WLAN_CIPHER_SUITE_AES_CMAC:
2220                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2221                 break;
2222         case WLAN_CIPHER_SUITE_WEP40:
2223         case WLAN_CIPHER_SUITE_WEP104:
2224                 /*
2225                  * Support for TX only, at least for now, so accept
2226                  * the key and do nothing else. Then mac80211 will
2227                  * pass it for TX but we don't have to use it for RX.
2228                  */
2229                 return 0;
2230         default:
2231                 /* currently FW supports only one optional cipher scheme */
2232                 if (hw->n_cipher_schemes &&
2233                     hw->cipher_schemes->cipher == key->cipher)
2234                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2235                 else
2236                         return -EOPNOTSUPP;
2237         }
2238
2239         mutex_lock(&mvm->mutex);
2240
2241         switch (cmd) {
2242         case SET_KEY:
2243                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2244                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2245                         /*
2246                          * GTK on AP interface is a TX-only key, return 0;
2247                          * on IBSS they're per-station and because we're lazy
2248                          * we don't support them for RX, so do the same.
2249                          */
2250                         ret = 0;
2251                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2252                         break;
2253                 }
2254
2255                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2256                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2257                 if (ret) {
2258                         IWL_WARN(mvm, "set key failed\n");
2259                         /*
2260                          * can't add key for RX, but we don't need it
2261                          * in the device for TX so still return 0
2262                          */
2263                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2264                         ret = 0;
2265                 }
2266
2267                 break;
2268         case DISABLE_KEY:
2269                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2270                         ret = 0;
2271                         break;
2272                 }
2273
2274                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2275                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2276                 break;
2277         default:
2278                 ret = -EINVAL;
2279         }
2280
2281         mutex_unlock(&mvm->mutex);
2282         return ret;
2283 }
2284
2285 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2286                                         struct ieee80211_vif *vif,
2287                                         struct ieee80211_key_conf *keyconf,
2288                                         struct ieee80211_sta *sta,
2289                                         u32 iv32, u16 *phase1key)
2290 {
2291         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2292
2293         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2294                 return;
2295
2296         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2297 }
2298
2299
2300 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2301                                struct iwl_rx_packet *pkt, void *data)
2302 {
2303         struct iwl_mvm *mvm =
2304                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2305         struct iwl_hs20_roc_res *resp;
2306         int resp_len = iwl_rx_packet_payload_len(pkt);
2307         struct iwl_mvm_time_event_data *te_data = data;
2308
2309         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2310                 return true;
2311
2312         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2313                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2314                 return true;
2315         }
2316
2317         resp = (void *)pkt->data;
2318
2319         IWL_DEBUG_TE(mvm,
2320                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2321                      resp->status, resp->event_unique_id);
2322
2323         te_data->uid = le32_to_cpu(resp->event_unique_id);
2324         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2325                      te_data->uid);
2326
2327         spin_lock_bh(&mvm->time_event_lock);
2328         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2329         spin_unlock_bh(&mvm->time_event_lock);
2330
2331         return true;
2332 }
2333
2334 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2335 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2336                                     struct ieee80211_channel *channel,
2337                                     struct ieee80211_vif *vif,
2338                                     int duration)
2339 {
2340         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2341         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2342         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2343         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2344         struct iwl_notification_wait wait_time_event;
2345         struct iwl_hs20_roc_req aux_roc_req = {
2346                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2347                 .id_and_color =
2348                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2349                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2350                 /* Set the channel info data */
2351                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2352                         PHY_BAND_24 : PHY_BAND_5,
2353                 .channel_info.channel = channel->hw_value,
2354                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2355                 /* Set the time and duration */
2356                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2357                 .apply_time_max_delay =
2358                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2359                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2360          };
2361
2362         /* Set the node address */
2363         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2364
2365         lockdep_assert_held(&mvm->mutex);
2366
2367         spin_lock_bh(&mvm->time_event_lock);
2368
2369         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2370                 spin_unlock_bh(&mvm->time_event_lock);
2371                 return -EIO;
2372         }
2373
2374         te_data->vif = vif;
2375         te_data->duration = duration;
2376         te_data->id = HOT_SPOT_CMD;
2377
2378         spin_unlock_bh(&mvm->time_event_lock);
2379
2380         /*
2381          * Use a notification wait, which really just processes the
2382          * command response and doesn't wait for anything, in order
2383          * to be able to process the response and get the UID inside
2384          * the RX path. Using CMD_WANT_SKB doesn't work because it
2385          * stores the buffer and then wakes up this thread, by which
2386          * time another notification (that the time event started)
2387          * might already be processed unsuccessfully.
2388          */
2389         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2390                                    time_event_response,
2391                                    ARRAY_SIZE(time_event_response),
2392                                    iwl_mvm_rx_aux_roc, te_data);
2393
2394         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2395                                    &aux_roc_req);
2396
2397         if (res) {
2398                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2399                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2400                 goto out_clear_te;
2401         }
2402
2403         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2404         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2405         /* should never fail */
2406         WARN_ON_ONCE(res);
2407
2408         if (res) {
2409  out_clear_te:
2410                 spin_lock_bh(&mvm->time_event_lock);
2411                 iwl_mvm_te_clear_data(mvm, te_data);
2412                 spin_unlock_bh(&mvm->time_event_lock);
2413         }
2414
2415         return res;
2416 }
2417
2418 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2419                        struct ieee80211_vif *vif,
2420                        struct ieee80211_channel *channel,
2421                        int duration,
2422                        enum ieee80211_roc_type type)
2423 {
2424         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2425         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2426         struct cfg80211_chan_def chandef;
2427         struct iwl_mvm_phy_ctxt *phy_ctxt;
2428         int ret, i;
2429
2430         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2431                            duration, type);
2432
2433         mutex_lock(&mvm->mutex);
2434
2435         switch (vif->type) {
2436         case NL80211_IFTYPE_STATION:
2437                 /* Use aux roc framework (HS20) */
2438                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2439                                                vif, duration);
2440                 goto out_unlock;
2441         case NL80211_IFTYPE_P2P_DEVICE:
2442                 /* handle below */
2443                 break;
2444         default:
2445                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2446                 ret = -EINVAL;
2447                 goto out_unlock;
2448         }
2449
2450         for (i = 0; i < NUM_PHY_CTX; i++) {
2451                 phy_ctxt = &mvm->phy_ctxts[i];
2452                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2453                         continue;
2454
2455                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2456                         /*
2457                          * Unbind the P2P_DEVICE from the current PHY context,
2458                          * and if the PHY context is not used remove it.
2459                          */
2460                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2461                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2462                                 goto out_unlock;
2463
2464                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2465
2466                         /* Bind the P2P_DEVICE to the current PHY Context */
2467                         mvmvif->phy_ctxt = phy_ctxt;
2468
2469                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2470                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2471                                 goto out_unlock;
2472
2473                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2474                         goto schedule_time_event;
2475                 }
2476         }
2477
2478         /* Need to update the PHY context only if the ROC channel changed */
2479         if (channel == mvmvif->phy_ctxt->channel)
2480                 goto schedule_time_event;
2481
2482         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2483
2484         /*
2485          * Change the PHY context configuration as it is currently referenced
2486          * only by the P2P Device MAC
2487          */
2488         if (mvmvif->phy_ctxt->ref == 1) {
2489                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2490                                                &chandef, 1, 1);
2491                 if (ret)
2492                         goto out_unlock;
2493         } else {
2494                 /*
2495                  * The PHY context is shared with other MACs. Need to remove the
2496                  * P2P Device from the binding, allocate an new PHY context and
2497                  * create a new binding
2498                  */
2499                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2500                 if (!phy_ctxt) {
2501                         ret = -ENOSPC;
2502                         goto out_unlock;
2503                 }
2504
2505                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2506                                                1, 1);
2507                 if (ret) {
2508                         IWL_ERR(mvm, "Failed to change PHY context\n");
2509                         goto out_unlock;
2510                 }
2511
2512                 /* Unbind the P2P_DEVICE from the current PHY context */
2513                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2514                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2515                         goto out_unlock;
2516
2517                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2518
2519                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2520                 mvmvif->phy_ctxt = phy_ctxt;
2521
2522                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2523                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2524                         goto out_unlock;
2525
2526                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2527         }
2528
2529 schedule_time_event:
2530         /* Schedule the time events */
2531         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2532
2533 out_unlock:
2534         mutex_unlock(&mvm->mutex);
2535         IWL_DEBUG_MAC80211(mvm, "leave\n");
2536         return ret;
2537 }
2538
2539 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2540 {
2541         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2542
2543         IWL_DEBUG_MAC80211(mvm, "enter\n");
2544
2545         mutex_lock(&mvm->mutex);
2546         iwl_mvm_stop_p2p_roc(mvm);
2547         mutex_unlock(&mvm->mutex);
2548
2549         IWL_DEBUG_MAC80211(mvm, "leave\n");
2550         return 0;
2551 }
2552
2553 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2554                                  struct ieee80211_chanctx_conf *ctx)
2555 {
2556         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2557         struct iwl_mvm_phy_ctxt *phy_ctxt;
2558         int ret;
2559
2560         lockdep_assert_held(&mvm->mutex);
2561
2562         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2563
2564         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2565         if (!phy_ctxt) {
2566                 ret = -ENOSPC;
2567                 goto out;
2568         }
2569
2570         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2571                                        ctx->rx_chains_static,
2572                                        ctx->rx_chains_dynamic);
2573         if (ret) {
2574                 IWL_ERR(mvm, "Failed to add PHY context\n");
2575                 goto out;
2576         }
2577
2578         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2579         *phy_ctxt_id = phy_ctxt->id;
2580 out:
2581         return ret;
2582 }
2583
2584 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2585                                struct ieee80211_chanctx_conf *ctx)
2586 {
2587         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2588         int ret;
2589
2590         mutex_lock(&mvm->mutex);
2591         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2592         mutex_unlock(&mvm->mutex);
2593
2594         return ret;
2595 }
2596
2597 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2598                                      struct ieee80211_chanctx_conf *ctx)
2599 {
2600         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2601         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2602
2603         lockdep_assert_held(&mvm->mutex);
2604
2605         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2606 }
2607
2608 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2609                                    struct ieee80211_chanctx_conf *ctx)
2610 {
2611         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2612
2613         mutex_lock(&mvm->mutex);
2614         __iwl_mvm_remove_chanctx(mvm, ctx);
2615         mutex_unlock(&mvm->mutex);
2616 }
2617
2618 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2619                                    struct ieee80211_chanctx_conf *ctx,
2620                                    u32 changed)
2621 {
2622         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2623         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2624         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2625
2626         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2627                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2628                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2629                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2630                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2631                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2632                       phy_ctxt->ref, changed))
2633                 return;
2634
2635         mutex_lock(&mvm->mutex);
2636         iwl_mvm_bt_coex_vif_change(mvm);
2637         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2638                                  ctx->rx_chains_static,
2639                                  ctx->rx_chains_dynamic);
2640         mutex_unlock(&mvm->mutex);
2641 }
2642
2643 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2644                                         struct ieee80211_vif *vif,
2645                                         struct ieee80211_chanctx_conf *ctx,
2646                                         bool switching_chanctx)
2647 {
2648         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2649         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2650         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2651         int ret;
2652
2653         lockdep_assert_held(&mvm->mutex);
2654
2655         mvmvif->phy_ctxt = phy_ctxt;
2656
2657         switch (vif->type) {
2658         case NL80211_IFTYPE_AP:
2659                 /* Unless it's a CSA flow we have nothing to do here */
2660                 if (vif->csa_active) {
2661                         mvmvif->ap_ibss_active = true;
2662                         break;
2663                 }
2664         case NL80211_IFTYPE_ADHOC:
2665                 /*
2666                  * The AP binding flow is handled as part of the start_ap flow
2667                  * (in bss_info_changed), similarly for IBSS.
2668                  */
2669                 ret = 0;
2670                 goto out;
2671         case NL80211_IFTYPE_STATION:
2672                 break;
2673         case NL80211_IFTYPE_MONITOR:
2674                 /* always disable PS when a monitor interface is active */
2675                 mvmvif->ps_disabled = true;
2676                 break;
2677         default:
2678                 ret = -EINVAL;
2679                 goto out;
2680         }
2681
2682         ret = iwl_mvm_binding_add_vif(mvm, vif);
2683         if (ret)
2684                 goto out;
2685
2686         /*
2687          * Power state must be updated before quotas,
2688          * otherwise fw will complain.
2689          */
2690         iwl_mvm_power_update_mac(mvm);
2691
2692         /* Setting the quota at this stage is only required for monitor
2693          * interfaces. For the other types, the bss_info changed flow
2694          * will handle quota settings.
2695          */
2696         if (vif->type == NL80211_IFTYPE_MONITOR) {
2697                 mvmvif->monitor_active = true;
2698                 ret = iwl_mvm_update_quotas(mvm, NULL);
2699                 if (ret)
2700                         goto out_remove_binding;
2701         }
2702
2703         /* Handle binding during CSA */
2704         if ((vif->type == NL80211_IFTYPE_AP) ||
2705             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2706                 iwl_mvm_update_quotas(mvm, NULL);
2707                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2708         }
2709
2710         if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
2711                 struct iwl_mvm_sta *mvmsta;
2712
2713                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2714                                                           mvmvif->ap_sta_id);
2715
2716                 if (WARN_ON(!mvmsta))
2717                         goto out;
2718
2719                 /* TODO: only re-enable after the first beacon */
2720                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2721         }
2722
2723         goto out;
2724
2725 out_remove_binding:
2726         iwl_mvm_binding_remove_vif(mvm, vif);
2727         iwl_mvm_power_update_mac(mvm);
2728 out:
2729         if (ret)
2730                 mvmvif->phy_ctxt = NULL;
2731         return ret;
2732 }
2733 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2734                                       struct ieee80211_vif *vif,
2735                                       struct ieee80211_chanctx_conf *ctx)
2736 {
2737         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2738         int ret;
2739
2740         mutex_lock(&mvm->mutex);
2741         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2742         mutex_unlock(&mvm->mutex);
2743
2744         return ret;
2745 }
2746
2747 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2748                                            struct ieee80211_vif *vif,
2749                                            struct ieee80211_chanctx_conf *ctx,
2750                                            bool switching_chanctx)
2751 {
2752         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2753         struct ieee80211_vif *disabled_vif = NULL;
2754         struct iwl_mvm_sta *mvmsta;
2755
2756         lockdep_assert_held(&mvm->mutex);
2757
2758         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2759
2760         switch (vif->type) {
2761         case NL80211_IFTYPE_ADHOC:
2762                 goto out;
2763         case NL80211_IFTYPE_MONITOR:
2764                 mvmvif->monitor_active = false;
2765                 mvmvif->ps_disabled = false;
2766                 break;
2767         case NL80211_IFTYPE_AP:
2768                 /* This part is triggered only during CSA */
2769                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2770                         goto out;
2771
2772                 /* Set CS bit on all the stations */
2773                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2774
2775                 /* Save blocked iface, the timeout is set on the next beacon */
2776                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2777
2778                 mvmvif->ap_ibss_active = false;
2779                 break;
2780         case NL80211_IFTYPE_STATION:
2781                 if (!switching_chanctx)
2782                         break;
2783
2784                 disabled_vif = vif;
2785
2786                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2787                                                           mvmvif->ap_sta_id);
2788
2789                 if (!WARN_ON(!mvmsta))
2790                         iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2791
2792                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2793                 break;
2794         default:
2795                 break;
2796         }
2797
2798         iwl_mvm_update_quotas(mvm, disabled_vif);
2799         iwl_mvm_binding_remove_vif(mvm, vif);
2800
2801 out:
2802         mvmvif->phy_ctxt = NULL;
2803         iwl_mvm_power_update_mac(mvm);
2804 }
2805
2806 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2807                                          struct ieee80211_vif *vif,
2808                                          struct ieee80211_chanctx_conf *ctx)
2809 {
2810         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2811
2812         mutex_lock(&mvm->mutex);
2813         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2814         mutex_unlock(&mvm->mutex);
2815 }
2816
2817 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2818                                       struct ieee80211_vif_chanctx_switch *vifs,
2819                                       int n_vifs,
2820                                       enum ieee80211_chanctx_switch_mode mode)
2821 {
2822         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2823         int ret;
2824
2825         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2826         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2827                 return -EOPNOTSUPP;
2828
2829         mutex_lock(&mvm->mutex);
2830         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2831         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2832
2833         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2834         if (ret) {
2835                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2836                 goto out_reassign;
2837         }
2838
2839         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2840                                            true);
2841         if (ret) {
2842                 IWL_ERR(mvm,
2843                         "failed to assign new_ctx during channel switch\n");
2844                 goto out_remove;
2845         }
2846
2847         /* we don't support TDLS during DCM - can be caused by channel switch */
2848         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2849                 iwl_mvm_teardown_tdls_peers(mvm);
2850
2851         goto out;
2852
2853 out_remove:
2854         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2855
2856 out_reassign:
2857         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2858         if (ret) {
2859                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2860                 goto out_restart;
2861         }
2862
2863         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2864                                            true);
2865         if (ret) {
2866                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2867                 goto out_restart;
2868         }
2869
2870         goto out;
2871
2872 out_restart:
2873         /* things keep failing, better restart the hw */
2874         iwl_mvm_nic_restart(mvm, false);
2875
2876 out:
2877         mutex_unlock(&mvm->mutex);
2878         return ret;
2879 }
2880
2881 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2882                            struct ieee80211_sta *sta,
2883                            bool set)
2884 {
2885         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2886         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2887
2888         if (!mvm_sta || !mvm_sta->vif) {
2889                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2890                 return -EINVAL;
2891         }
2892
2893         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2894 }
2895
2896 #ifdef CONFIG_NL80211_TESTMODE
2897 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2898         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2899         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2900         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2901 };
2902
2903 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2904                                       struct ieee80211_vif *vif,
2905                                       void *data, int len)
2906 {
2907         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2908         int err;
2909         u32 noa_duration;
2910
2911         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2912         if (err)
2913                 return err;
2914
2915         if (!tb[IWL_MVM_TM_ATTR_CMD])
2916                 return -EINVAL;
2917
2918         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2919         case IWL_MVM_TM_CMD_SET_NOA:
2920                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2921                     !vif->bss_conf.enable_beacon ||
2922                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2923                         return -EINVAL;
2924
2925                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2926                 if (noa_duration >= vif->bss_conf.beacon_int)
2927                         return -EINVAL;
2928
2929                 mvm->noa_duration = noa_duration;
2930                 mvm->noa_vif = vif;
2931
2932                 return iwl_mvm_update_quotas(mvm, NULL);
2933         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2934                 /* must be associated client vif - ignore authorized */
2935                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2936                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2937                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2938                         return -EINVAL;
2939
2940                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2941                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2942                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2943         }
2944
2945         return -EOPNOTSUPP;
2946 }
2947
2948 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2949                                     struct ieee80211_vif *vif,
2950                                     void *data, int len)
2951 {
2952         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2953         int err;
2954
2955         mutex_lock(&mvm->mutex);
2956         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2957         mutex_unlock(&mvm->mutex);
2958
2959         return err;
2960 }
2961 #endif
2962
2963 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2964                                           struct ieee80211_vif *vif,
2965                                           struct cfg80211_chan_def *chandef)
2966 {
2967         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2968         struct ieee80211_vif *csa_vif;
2969
2970         mutex_lock(&mvm->mutex);
2971
2972         csa_vif = rcu_dereference_protected(mvm->csa_vif,
2973                                             lockdep_is_held(&mvm->mutex));
2974         if (WARN(csa_vif && csa_vif->csa_active,
2975                  "Another CSA is already in progress"))
2976                 goto out_unlock;
2977
2978         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2979                            chandef->center_freq1);
2980         rcu_assign_pointer(mvm->csa_vif, vif);
2981
2982 out_unlock:
2983         mutex_unlock(&mvm->mutex);
2984 }
2985
2986 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2987                               struct ieee80211_vif *vif, u32 queues, bool drop)
2988 {
2989         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2990         struct iwl_mvm_vif *mvmvif;
2991         struct iwl_mvm_sta *mvmsta;
2992
2993         if (!vif || vif->type != NL80211_IFTYPE_STATION)
2994                 return;
2995
2996         mutex_lock(&mvm->mutex);
2997         mvmvif = iwl_mvm_vif_from_mac80211(vif);
2998         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
2999
3000         if (WARN_ON_ONCE(!mvmsta))
3001                 goto done;
3002
3003         if (drop) {
3004                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3005                         IWL_ERR(mvm, "flush request fail\n");
3006         } else {
3007                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3008                                               mvmsta->tfd_queue_msk);
3009         }
3010 done:
3011         mutex_unlock(&mvm->mutex);
3012 }
3013
3014 const struct ieee80211_ops iwl_mvm_hw_ops = {
3015         .tx = iwl_mvm_mac_tx,
3016         .ampdu_action = iwl_mvm_mac_ampdu_action,
3017         .start = iwl_mvm_mac_start,
3018         .restart_complete = iwl_mvm_mac_restart_complete,
3019         .stop = iwl_mvm_mac_stop,
3020         .add_interface = iwl_mvm_mac_add_interface,
3021         .remove_interface = iwl_mvm_mac_remove_interface,
3022         .config = iwl_mvm_mac_config,
3023         .prepare_multicast = iwl_mvm_prepare_multicast,
3024         .configure_filter = iwl_mvm_configure_filter,
3025         .bss_info_changed = iwl_mvm_bss_info_changed,
3026         .hw_scan = iwl_mvm_mac_hw_scan,
3027         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3028         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3029         .sta_state = iwl_mvm_mac_sta_state,
3030         .sta_notify = iwl_mvm_mac_sta_notify,
3031         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3032         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3033         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3034         .sta_rc_update = iwl_mvm_sta_rc_update,
3035         .conf_tx = iwl_mvm_mac_conf_tx,
3036         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3037         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3038         .flush = iwl_mvm_mac_flush,
3039         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3040         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3041         .set_key = iwl_mvm_mac_set_key,
3042         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3043         .remain_on_channel = iwl_mvm_roc,
3044         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3045         .add_chanctx = iwl_mvm_add_chanctx,
3046         .remove_chanctx = iwl_mvm_remove_chanctx,
3047         .change_chanctx = iwl_mvm_change_chanctx,
3048         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3049         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3050         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3051
3052         .start_ap = iwl_mvm_start_ap_ibss,
3053         .stop_ap = iwl_mvm_stop_ap_ibss,
3054         .join_ibss = iwl_mvm_start_ap_ibss,
3055         .leave_ibss = iwl_mvm_stop_ap_ibss,
3056
3057         .set_tim = iwl_mvm_set_tim,
3058
3059         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3060
3061         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3062
3063 #ifdef CONFIG_PM_SLEEP
3064         /* look at d3.c */
3065         .suspend = iwl_mvm_suspend,
3066         .resume = iwl_mvm_resume,
3067         .set_wakeup = iwl_mvm_set_wakeup,
3068         .set_rekey_data = iwl_mvm_set_rekey_data,
3069 #if IS_ENABLED(CONFIG_IPV6)
3070         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3071 #endif
3072         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3073 #endif
3074 };