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.
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  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
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  20  * along with this program; if not, write to the Free Software
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  44  *    the documentation and/or other materials provided with the
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  48  *    from this software without specific prior written permission.
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  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/kernel.h>
  64 #include <linux/slab.h>
  65 #include <linux/skbuff.h>
  66 #include <linux/netdevice.h>
  67 #include <linux/etherdevice.h>
  68 #include <linux/ip.h>
  69 #include <linux/if_arp.h>
  70 #include <net/mac80211.h>
  71 #include <net/ieee80211_radiotap.h>
  72 #include <net/tcp.h>
  73
  74 #include "iwl-op-mode.h"
  75 #include "iwl-io.h"
  76 #include "mvm.h"
  77 #include "sta.h"
  78 #include "time-event.h"
  79 #include "iwl-eeprom-parse.h"
  80 #include "fw-api-scan.h"
  81 #include "iwl-phy-db.h"
  82 #include "testmode.h"
  83 #include "iwl-fw-error-dump.h"
  84 #include "iwl-prph.h"
  85
  86 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  87         {
  88                 .max = 1,
  89                 .types = BIT(NL80211_IFTYPE_STATION),
  90         },
  91         {
  92                 .max = 1,
  93                 .types = BIT(NL80211_IFTYPE_AP) |
  94                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  95                         BIT(NL80211_IFTYPE_P2P_GO),
  96         },
  97         {
  98                 .max = 1,
  99                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 100         },
 101 };
 102
 103 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 104         {
 105                 .num_different_channels = 1,
 106                 .max_interfaces = 3,
 107                 .limits = iwl_mvm_limits,
 108                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 109         },
 110 };
 111
 112 #ifdef CONFIG_PM_SLEEP
 113 static const struct nl80211_wowlan_tcp_data_token_feature
 114 iwl_mvm_wowlan_tcp_token_feature = {
 115         .min_len = 0,
 116         .max_len = 255,
 117         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 118 };
 119
 120 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 121         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 122         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 123                             sizeof(struct ethhdr) -
 124                             sizeof(struct iphdr) -
 125                             sizeof(struct tcphdr),
 126         .data_interval_max = 65535, /* __le16 in API */
 127         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 128                             sizeof(struct ethhdr) -
 129                             sizeof(struct iphdr) -
 130                             sizeof(struct tcphdr),
 131         .seq = true,
 132 };
 133 #endif
 134
 135 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 136 /*
 137  * Use the reserved field to indicate magic values.
 138  * these values will only be used internally by the driver,
 139  * and won't make it to the fw (reserved will be 0).
 140  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 141  *      be the vif's ip address. in case there is not a single
 142  *      ip address (0, or more than 1), this attribute will
 143  *      be skipped.
 144  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 145  *      the LSB bytes of the vif's mac address
 146  */
 147 enum {
 148         BC_FILTER_MAGIC_NONE = 0,
 149         BC_FILTER_MAGIC_IP,
 150         BC_FILTER_MAGIC_MAC,
 151 };
 152
 153 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 154         {
 155                 /* arp */
 156                 .discard = 0,
 157                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 158                 .attrs = {
 159                         {
 160                                 /* frame type - arp, hw type - ethernet */
 161                                 .offset_type =
 162                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 163                                 .offset = sizeof(rfc1042_header),
 164                                 .val = cpu_to_be32(0x08060001),
 165                                 .mask = cpu_to_be32(0xffffffff),
 166                         },
 167                         {
 168                                 /* arp dest ip */
 169                                 .offset_type =
 170                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 171                                 .offset = sizeof(rfc1042_header) + 2 +
 172                                           sizeof(struct arphdr) +
 173                                           ETH_ALEN + sizeof(__be32) +
 174                                           ETH_ALEN,
 175                                 .mask = cpu_to_be32(0xffffffff),
 176                                 /* mark it as special field */
 177                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 178                         },
 179                 },
 180         },
 181         {
 182                 /* dhcp offer bcast */
 183                 .discard = 0,
 184                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 185                 .attrs = {
 186                         {
 187                                 /* udp dest port - 68 (bootp client)*/
 188                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 189                                 .offset = offsetof(struct udphdr, dest),
 190                                 .val = cpu_to_be32(0x00440000),
 191                                 .mask = cpu_to_be32(0xffff0000),
 192                         },
 193                         {
 194                                 /* dhcp - lsb bytes of client hw address */
 195                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 196                                 .offset = 38,
 197                                 .mask = cpu_to_be32(0xffffffff),
 198                                 /* mark it as special field */
 199                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 200                         },
 201                 },
 202         },
 203         /* last filter must be empty */
 204         {},
 205 };
 206 #endif
 207
 208 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 209 {
 210         if (!iwl_mvm_is_d0i3_supported(mvm))
 211                 return;
 212
 213         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 214         spin_lock_bh(&mvm->refs_lock);
 215         mvm->refs[ref_type]++;
 216         spin_unlock_bh(&mvm->refs_lock);
 217         iwl_trans_ref(mvm->trans);
 218 }
 219
 220 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 221 {
 222         if (!iwl_mvm_is_d0i3_supported(mvm))
 223                 return;
 224
 225         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 226         spin_lock_bh(&mvm->refs_lock);
 227         WARN_ON(!mvm->refs[ref_type]--);
 228         spin_unlock_bh(&mvm->refs_lock);
 229         iwl_trans_unref(mvm->trans);
 230 }
 231
 232 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 233                                      enum iwl_mvm_ref_type except_ref)
 234 {
 235         int i, j;
 236
 237         if (!iwl_mvm_is_d0i3_supported(mvm))
 238                 return;
 239
 240         spin_lock_bh(&mvm->refs_lock);
 241         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 242                 if (except_ref == i || !mvm->refs[i])
 243                         continue;
 244
 245                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 246                               i, mvm->refs[i]);
 247                 for (j = 0; j < mvm->refs[i]; j++)
 248                         iwl_trans_unref(mvm->trans);
 249                 mvm->refs[i] = 0;
 250         }
 251         spin_unlock_bh(&mvm->refs_lock);
 252 }
 253
 254 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 255 {
 256         iwl_mvm_ref(mvm, ref_type);
 257
 258         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 259                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 260                                 HZ)) {
 261                 WARN_ON_ONCE(1);
 262                 iwl_mvm_unref(mvm, ref_type);
 263                 return -EIO;
 264         }
 265
 266         return 0;
 267 }
 268
 269 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 270 {
 271         int i;
 272
 273         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 274         for (i = 0; i < NUM_PHY_CTX; i++) {
 275                 mvm->phy_ctxts[i].id = i;
 276                 mvm->phy_ctxts[i].ref = 0;
 277         }
 278 }
 279
 280 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 281 {
 282         /* we create the 802.11 header and SSID element */
 283         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
 284                 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
 285         return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
 286 }
 287
 288 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 289 {
 290         struct ieee80211_hw *hw = mvm->hw;
 291         int num_mac, ret, i;
 292
 293         /* Tell mac80211 our characteristics */
 294         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 295                     IEEE80211_HW_SPECTRUM_MGMT |
 296                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 297                     IEEE80211_HW_QUEUE_CONTROL |
 298                     IEEE80211_HW_WANT_MONITOR_VIF |
 299                     IEEE80211_HW_SUPPORTS_PS |
 300                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 301                     IEEE80211_HW_AMPDU_AGGREGATION |
 302                     IEEE80211_HW_TIMING_BEACON_ONLY |
 303                     IEEE80211_HW_CONNECTION_MONITOR |
 304                     IEEE80211_HW_CHANCTX_STA_CSA |
 305                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 306                     IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 307
 308         hw->queues = mvm->first_agg_queue;
 309         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 310         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 311                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 312         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
 313         hw->rate_control_algorithm = "iwl-mvm-rs";
 314
 315         /*
 316          * Enable 11w if advertised by firmware and software crypto
 317          * is not enabled (as the firmware will interpret some mgmt
 318          * packets, so enabling it with software crypto isn't safe)
 319          */
 320         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 321             !iwlwifi_mod_params.sw_crypto)
 322                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 323
 324         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 325             IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
 326             !iwlwifi_mod_params.uapsd_disable) {
 327                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 328                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 329                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 330         }
 331
 332         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
 333             !iwlwifi_mod_params.uapsd_disable) {
 334                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
 335                 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
 336                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 337         }
 338
 339         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 340                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 341
 342         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 343         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 344         hw->chanctx_data_size = sizeof(u16);
 345
 346         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 347                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 348                 BIT(NL80211_IFTYPE_AP) |
 349                 BIT(NL80211_IFTYPE_P2P_GO) |
 350                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 351                 BIT(NL80211_IFTYPE_ADHOC);
 352
 353         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 354         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 355                                        REGULATORY_DISABLE_BEACON_HINTS;
 356
 357         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 358                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 359
 360         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
 361                 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 362
 363         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 364         hw->wiphy->n_iface_combinations =
 365                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 366
 367         hw->wiphy->max_remain_on_channel_duration = 10000;
 368         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 369
 370         /* Extract MAC address */
 371         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 372         hw->wiphy->addresses = mvm->addresses;
 373         hw->wiphy->n_addresses = 1;
 374
 375         /* Extract additional MAC addresses if available */
 376         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 377                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 378
 379         for (i = 1; i < num_mac; i++) {
 380                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 381                        ETH_ALEN);
 382                 mvm->addresses[i].addr[5]++;
 383                 hw->wiphy->n_addresses++;
 384         }
 385
 386         iwl_mvm_reset_phy_ctxts(mvm);
 387
 388         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
 389
 390         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 391
 392         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 393                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 394                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 395         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 396                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 397                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 398
 399         hw->wiphy->hw_version = mvm->trans->hw_id;
 400
 401         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 402                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 403         else
 404                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 405
 406         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 407         hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 408         hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 409         /* we create the 802.11 header and zero length SSID IE. */
 410         hw->wiphy->max_sched_scan_ie_len = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 411
 412         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 413                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 414                                NL80211_FEATURE_P2P_GO_OPPPS;
 415
 416         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 417
 418         /* currently FW API supports only one optional cipher scheme */
 419         if (mvm->fw->cs[0].cipher) {
 420                 mvm->hw->n_cipher_schemes = 1;
 421                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 422         }
 423
 424 #ifdef CONFIG_PM_SLEEP
 425         if (iwl_mvm_is_d0i3_supported(mvm) &&
 426             device_can_wakeup(mvm->trans->dev)) {
 427                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 428                 hw->wiphy->wowlan = &mvm->wowlan;
 429         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 430             mvm->trans->ops->d3_suspend &&
 431             mvm->trans->ops->d3_resume &&
 432             device_can_wakeup(mvm->trans->dev)) {
 433                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 434                                     WIPHY_WOWLAN_DISCONNECT |
 435                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 436                                     WIPHY_WOWLAN_RFKILL_RELEASE;
 437                 if (!iwlwifi_mod_params.sw_crypto)
 438                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 439                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 440                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 441
 442                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 443                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 444                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 445                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 446                 hw->wiphy->wowlan = &mvm->wowlan;
 447         }
 448 #endif
 449
 450 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 451         /* assign default bcast filtering configuration */
 452         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 453 #endif
 454
 455         ret = iwl_mvm_leds_init(mvm);
 456         if (ret)
 457                 return ret;
 458
 459         ret = ieee80211_register_hw(mvm->hw);
 460         if (ret)
 461                 iwl_mvm_leds_exit(mvm);
 462
 463         return ret;
 464 }
 465
 466 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 467                              struct ieee80211_sta *sta,
 468                              struct sk_buff *skb)
 469 {
 470         struct iwl_mvm_sta *mvmsta;
 471         bool defer = false;
 472
 473         /*
 474          * double check the IN_D0I3 flag both before and after
 475          * taking the spinlock, in order to prevent taking
 476          * the spinlock when not needed.
 477          */
 478         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 479                 return false;
 480
 481         spin_lock(&mvm->d0i3_tx_lock);
 482         /*
 483          * testing the flag again ensures the skb dequeue
 484          * loop (on d0i3 exit) hasn't run yet.
 485          */
 486         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 487                 goto out;
 488
 489         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 490         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 491             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 492                 goto out;
 493
 494         __skb_queue_tail(&mvm->d0i3_tx, skb);
 495         ieee80211_stop_queues(mvm->hw);
 496
 497         /* trigger wakeup */
 498         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 499         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 500
 501         defer = true;
 502 out:
 503         spin_unlock(&mvm->d0i3_tx_lock);
 504         return defer;
 505 }
 506
 507 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 508                            struct ieee80211_tx_control *control,
 509                            struct sk_buff *skb)
 510 {
 511         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 512         struct ieee80211_sta *sta = control->sta;
 513         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 514         struct ieee80211_hdr *hdr = (void *)skb->data;
 515
 516         if (iwl_mvm_is_radio_killed(mvm)) {
 517                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 518                 goto drop;
 519         }
 520
 521         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 522             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
 523                 goto drop;
 524
 525         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 526         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 527                      ieee80211_is_mgmt(hdr->frame_control) &&
 528                      !ieee80211_is_deauth(hdr->frame_control) &&
 529                      !ieee80211_is_disassoc(hdr->frame_control) &&
 530                      !ieee80211_is_action(hdr->frame_control)))
 531                 sta = NULL;
 532
 533         if (sta) {
 534                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 535                         return;
 536                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 537                         goto drop;
 538                 return;
 539         }
 540
 541         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 542                 goto drop;
 543         return;
 544  drop:
 545         ieee80211_free_txskb(hw, skb);
 546 }
 547
 548 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 549 {
 550         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 551                 return false;
 552         return true;
 553 }
 554
 555 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 556 {
 557         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 558                 return false;
 559         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 560                 return true;
 561
 562         /* enabled by default */
 563         return true;
 564 }
 565
 566 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 567                                     struct ieee80211_vif *vif,
 568                                     enum ieee80211_ampdu_mlme_action action,
 569                                     struct ieee80211_sta *sta, u16 tid,
 570                                     u16 *ssn, u8 buf_size)
 571 {
 572         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 573         int ret;
 574         bool tx_agg_ref = false;
 575
 576         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 577                      sta->addr, tid, action);
 578
 579         if (!(mvm->nvm_data->sku_cap_11n_enable))
 580                 return -EACCES;
 581
 582         /* return from D0i3 before starting a new Tx aggregation */
 583         switch (action) {
 584         case IEEE80211_AMPDU_TX_START:
 585         case IEEE80211_AMPDU_TX_STOP_CONT:
 586         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 587         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 588         case IEEE80211_AMPDU_TX_OPERATIONAL:
 589                 /*
 590                  * for tx start, wait synchronously until D0i3 exit to
 591                  * get the correct sequence number for the tid.
 592                  * additionally, some other ampdu actions use direct
 593                  * target access, which is not handled automatically
 594                  * by the trans layer (unlike commands), so wait for
 595                  * d0i3 exit in these cases as well.
 596                  */
 597                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 598                 if (ret)
 599                         return ret;
 600
 601                 tx_agg_ref = true;
 602                 break;
 603         default:
 604                 break;
 605         }
 606
 607         mutex_lock(&mvm->mutex);
 608
 609         switch (action) {
 610         case IEEE80211_AMPDU_RX_START:
 611                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 612                         ret = -EINVAL;
 613                         break;
 614                 }
 615                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 616                 break;
 617         case IEEE80211_AMPDU_RX_STOP:
 618                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 619                 break;
 620         case IEEE80211_AMPDU_TX_START:
 621                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 622                         ret = -EINVAL;
 623                         break;
 624                 }
 625                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 626                 break;
 627         case IEEE80211_AMPDU_TX_STOP_CONT:
 628                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 629                 break;
 630         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 631         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 632                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 633                 break;
 634         case IEEE80211_AMPDU_TX_OPERATIONAL:
 635                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 636                 break;
 637         default:
 638                 WARN_ON_ONCE(1);
 639                 ret = -EINVAL;
 640                 break;
 641         }
 642         mutex_unlock(&mvm->mutex);
 643
 644         /*
 645          * If the tid is marked as started, we won't use it for offloaded
 646          * traffic on the next D0i3 entry. It's safe to unref.
 647          */
 648         if (tx_agg_ref)
 649                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 650
 651         return ret;
 652 }
 653
 654 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 655                                      struct ieee80211_vif *vif)
 656 {
 657         struct iwl_mvm *mvm = data;
 658         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 659
 660         mvmvif->uploaded = false;
 661         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 662
 663         /* does this make sense at all? */
 664         mvmvif->color++;
 665
 666         spin_lock_bh(&mvm->time_event_lock);
 667         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 668         spin_unlock_bh(&mvm->time_event_lock);
 669
 670         mvmvif->phy_ctxt = NULL;
 671 }
 672
 673 #ifdef CONFIG_IWLWIFI_DEBUGFS
 674 static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 675 {
 676         struct iwl_fw_error_dump_file *dump_file;
 677         struct iwl_fw_error_dump_data *dump_data;
 678         struct iwl_fw_error_dump_info *dump_info;
 679         struct iwl_mvm_dump_ptrs *fw_error_dump;
 680         const struct fw_img *img;
 681         u32 sram_len, sram_ofs;
 682         u32 file_len, rxf_len;
 683         unsigned long flags;
 684         int reg_val;
 685
 686         lockdep_assert_held(&mvm->mutex);
 687
 688         if (mvm->fw_error_dump)
 689                 return;
 690
 691         fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
 692         if (!fw_error_dump)
 693                 return;
 694
 695         img = &mvm->fw->img[mvm->cur_ucode];
 696         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
 697         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
 698
 699         /* reading buffer size */
 700         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
 701         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
 702
 703         /* the register holds the value divided by 128 */
 704         rxf_len = rxf_len << 7;
 705
 706         file_len = sizeof(*dump_file) +
 707                    sizeof(*dump_data) * 3 +
 708                    sram_len +
 709                    rxf_len +
 710                    sizeof(*dump_info);
 711
 712         dump_file = vzalloc(file_len);
 713         if (!dump_file) {
 714                 kfree(fw_error_dump);
 715                 return;
 716         }
 717
 718         fw_error_dump->op_mode_ptr = dump_file;
 719
 720         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
 721         dump_data = (void *)dump_file->data;
 722
 723         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
 724         dump_data->len = cpu_to_le32(sizeof(*dump_info));
 725         dump_info = (void *) dump_data->data;
 726         dump_info->device_family =
 727                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
 728                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
 729                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
 730         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
 731                sizeof(dump_info->fw_human_readable));
 732         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
 733                 sizeof(dump_info->dev_human_readable));
 734         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
 735                 sizeof(dump_info->bus_human_readable));
 736
 737         dump_data = iwl_fw_error_next_data(dump_data);
 738         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 739         dump_data->len = cpu_to_le32(rxf_len);
 740
 741         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
 742                 u32 *rxf = (void *)dump_data->data;
 743                 int i;
 744
 745                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
 746                         iwl_trans_write_prph(mvm->trans,
 747                                              RXF_LD_FENCE_OFFSET_ADDR,
 748                                              i * sizeof(u32));
 749                         rxf[i] = iwl_trans_read_prph(mvm->trans,
 750                                                      RXF_FIFO_RD_FENCE_ADDR);
 751                 }
 752                 iwl_trans_release_nic_access(mvm->trans, &flags);
 753         }
 754
 755         dump_data = iwl_fw_error_next_data(dump_data);
 756         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
 757         dump_data->len = cpu_to_le32(sram_len);
 758         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
 759                                  sram_len);
 760
 761         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
 762         fw_error_dump->op_mode_len = file_len;
 763         if (fw_error_dump->trans_ptr)
 764                 file_len += fw_error_dump->trans_ptr->len;
 765         dump_file->file_len = cpu_to_le32(file_len);
 766         mvm->fw_error_dump = fw_error_dump;
 767 }
 768 #endif
 769
 770 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
 771 {
 772 #ifdef CONFIG_IWLWIFI_DEBUGFS
 773         static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
 774
 775         iwl_mvm_fw_error_dump(mvm);
 776
 777         /* notify the userspace about the error we had */
 778         kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
 779 #endif
 780
 781         iwl_trans_stop_device(mvm->trans);
 782
 783         mvm->scan_status = IWL_MVM_SCAN_NONE;
 784
 785         /* just in case one was running */
 786         ieee80211_remain_on_channel_expired(mvm->hw);
 787
 788         ieee80211_iterate_active_interfaces_atomic(
 789                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
 790                 iwl_mvm_cleanup_iterator, mvm);
 791
 792         mvm->p2p_device_vif = NULL;
 793         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
 794
 795         iwl_mvm_reset_phy_ctxts(mvm);
 796         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 797         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
 798
 799         ieee80211_wake_queues(mvm->hw);
 800
 801         /* cleanup all stale references (scan, roc), but keep the
 802          * ucode_down ref until reconfig is complete */
 803         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
 804
 805         mvm->vif_count = 0;
 806         mvm->rx_ba_sessions = 0;
 807 }
 808
 809 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
 810 {
 811         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 812         int ret;
 813
 814         mutex_lock(&mvm->mutex);
 815
 816         /* Clean up some internal and mac80211 state on restart */
 817         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 818                 iwl_mvm_restart_cleanup(mvm);
 819
 820         ret = iwl_mvm_up(mvm);
 821
 822         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
 823                 /* Something went wrong - we need to finish some cleanup
 824                  * that normally iwl_mvm_mac_restart_complete() below
 825                  * would do.
 826                  */
 827                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 828                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
 829         }
 830
 831         mutex_unlock(&mvm->mutex);
 832
 833         return ret;
 834 }
 835
 836 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
 837 {
 838         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 839         int ret;
 840
 841         mutex_lock(&mvm->mutex);
 842
 843         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 844         iwl_mvm_d0i3_enable_tx(mvm, NULL);
 845         ret = iwl_mvm_update_quotas(mvm, NULL);
 846         if (ret)
 847                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
 848                         ret);
 849
 850         /* allow transport/FW low power modes */
 851         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
 852
 853         mutex_unlock(&mvm->mutex);
 854 }
 855
 856 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
 857 {
 858         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 859
 860         flush_work(&mvm->d0i3_exit_work);
 861         flush_work(&mvm->async_handlers_wk);
 862
 863         mutex_lock(&mvm->mutex);
 864
 865         /* disallow low power states when the FW is down */
 866         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
 867
 868         /* async_handlers_wk is now blocked */
 869
 870         /*
 871          * The work item could be running or queued if the
 872          * ROC time event stops just as we get here.
 873          */
 874         cancel_work_sync(&mvm->roc_done_wk);
 875
 876         iwl_trans_stop_device(mvm->trans);
 877
 878         iwl_mvm_async_handlers_purge(mvm);
 879         /* async_handlers_list is empty and will stay empty: HW is stopped */
 880
 881         /* the fw is stopped, the aux sta is dead: clean up driver state */
 882         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
 883
 884         mutex_unlock(&mvm->mutex);
 885
 886         /*
 887          * The worker might have been waiting for the mutex, let it run and
 888          * discover that its list is now empty.
 889          */
 890         cancel_work_sync(&mvm->async_handlers_wk);
 891 }
 892
 893 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
 894 {
 895         u16 i;
 896
 897         lockdep_assert_held(&mvm->mutex);
 898
 899         for (i = 0; i < NUM_PHY_CTX; i++)
 900                 if (!mvm->phy_ctxts[i].ref)
 901                         return &mvm->phy_ctxts[i];
 902
 903         IWL_ERR(mvm, "No available PHY context\n");
 904         return NULL;
 905 }
 906
 907 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 908                                 s8 tx_power)
 909 {
 910         /* FW is in charge of regulatory enforcement */
 911         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
 912                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
 913                 .pwr_restriction = cpu_to_le16(tx_power),
 914         };
 915
 916         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
 917                                     sizeof(reduce_txpwr_cmd),
 918                                     &reduce_txpwr_cmd);
 919 }
 920
 921 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 922                                      struct ieee80211_vif *vif)
 923 {
 924         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 925         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 926         int ret;
 927
 928         /*
 929          * make sure D0i3 exit is completed, otherwise a target access
 930          * during tx queue configuration could be done when still in
 931          * D0i3 state.
 932          */
 933         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
 934         if (ret)
 935                 return ret;
 936
 937         /*
 938          * Not much to do here. The stack will not allow interface
 939          * types or combinations that we didn't advertise, so we
 940          * don't really have to check the types.
 941          */
 942
 943         mutex_lock(&mvm->mutex);
 944
 945         /* Allocate resources for the MAC context, and add it to the fw  */
 946         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
 947         if (ret)
 948                 goto out_unlock;
 949
 950         /* Counting number of interfaces is needed for legacy PM */
 951         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
 952                 mvm->vif_count++;
 953
 954         /*
 955          * The AP binding flow can be done only after the beacon
 956          * template is configured (which happens only in the mac80211
 957          * start_ap() flow), and adding the broadcast station can happen
 958          * only after the binding.
 959          * In addition, since modifying the MAC before adding a bcast
 960          * station is not allowed by the FW, delay the adding of MAC context to
 961          * the point where we can also add the bcast station.
 962          * In short: there's not much we can do at this point, other than
 963          * allocating resources :)
 964          */
 965         if (vif->type == NL80211_IFTYPE_AP ||
 966             vif->type == NL80211_IFTYPE_ADHOC) {
 967                 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
 968                 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
 969                                                qmask,
 970                                                ieee80211_vif_type_p2p(vif));
 971                 if (ret) {
 972                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
 973                         goto out_release;
 974                 }
 975
 976                 iwl_mvm_vif_dbgfs_register(mvm, vif);
 977                 goto out_unlock;
 978         }
 979
 980         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 981         if (ret)
 982                 goto out_release;
 983
 984         ret = iwl_mvm_power_update_mac(mvm);
 985         if (ret)
 986                 goto out_release;
 987
 988         /* beacon filtering */
 989         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 990         if (ret)
 991                 goto out_remove_mac;
 992
 993         if (!mvm->bf_allowed_vif &&
 994             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
 995                 mvm->bf_allowed_vif = mvmvif;
 996                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 997                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 998         }
 999
1000         /*
1001          * P2P_DEVICE interface does not have a channel context assigned to it,
1002          * so a dedicated PHY context is allocated to it and the corresponding
1003          * MAC context is bound to it at this stage.
1004          */
1005         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1006
1007                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1008                 if (!mvmvif->phy_ctxt) {
1009                         ret = -ENOSPC;
1010                         goto out_free_bf;
1011                 }
1012
1013                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1014                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1015                 if (ret)
1016                         goto out_unref_phy;
1017
1018                 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1019                 if (ret)
1020                         goto out_unbind;
1021
1022                 /* Save a pointer to p2p device vif, so it can later be used to
1023                  * update the p2p device MAC when a GO is started/stopped */
1024                 mvm->p2p_device_vif = vif;
1025         }
1026
1027         iwl_mvm_vif_dbgfs_register(mvm, vif);
1028         goto out_unlock;
1029
1030  out_unbind:
1031         iwl_mvm_binding_remove_vif(mvm, vif);
1032  out_unref_phy:
1033         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1034  out_free_bf:
1035         if (mvm->bf_allowed_vif == mvmvif) {
1036                 mvm->bf_allowed_vif = NULL;
1037                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1038                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1039         }
1040  out_remove_mac:
1041         mvmvif->phy_ctxt = NULL;
1042         iwl_mvm_mac_ctxt_remove(mvm, vif);
1043  out_release:
1044         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1045                 mvm->vif_count--;
1046
1047         iwl_mvm_mac_ctxt_release(mvm, vif);
1048  out_unlock:
1049         mutex_unlock(&mvm->mutex);
1050
1051         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1052
1053         return ret;
1054 }
1055
1056 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1057                                         struct ieee80211_vif *vif)
1058 {
1059         u32 tfd_msk = 0, ac;
1060
1061         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1062                 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
1063                         tfd_msk |= BIT(vif->hw_queue[ac]);
1064
1065         if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
1066                 tfd_msk |= BIT(vif->cab_queue);
1067
1068         if (tfd_msk) {
1069                 mutex_lock(&mvm->mutex);
1070                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1071                 mutex_unlock(&mvm->mutex);
1072         }
1073
1074         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1075                 /*
1076                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1077                  * We assume here that all the packets sent to the OFFCHANNEL
1078                  * queue are sent in ROC session.
1079                  */
1080                 flush_work(&mvm->roc_done_wk);
1081         } else {
1082                 /*
1083                  * By now, all the AC queues are empty. The AGG queues are
1084                  * empty too. We already got all the Tx responses for all the
1085                  * packets in the queues. The drain work can have been
1086                  * triggered. Flush it.
1087                  */
1088                 flush_work(&mvm->sta_drained_wk);
1089         }
1090 }
1091
1092 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1093                                          struct ieee80211_vif *vif)
1094 {
1095         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1096         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1097
1098         iwl_mvm_prepare_mac_removal(mvm, vif);
1099
1100         mutex_lock(&mvm->mutex);
1101
1102         if (mvm->bf_allowed_vif == mvmvif) {
1103                 mvm->bf_allowed_vif = NULL;
1104                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1105                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1106         }
1107
1108         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1109
1110         /*
1111          * For AP/GO interface, the tear down of the resources allocated to the
1112          * interface is be handled as part of the stop_ap flow.
1113          */
1114         if (vif->type == NL80211_IFTYPE_AP ||
1115             vif->type == NL80211_IFTYPE_ADHOC) {
1116 #ifdef CONFIG_NL80211_TESTMODE
1117                 if (vif == mvm->noa_vif) {
1118                         mvm->noa_vif = NULL;
1119                         mvm->noa_duration = 0;
1120                 }
1121 #endif
1122                 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1123                 goto out_release;
1124         }
1125
1126         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1127                 mvm->p2p_device_vif = NULL;
1128                 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1129                 iwl_mvm_binding_remove_vif(mvm, vif);
1130                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1131                 mvmvif->phy_ctxt = NULL;
1132         }
1133
1134         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1135                 mvm->vif_count--;
1136
1137         iwl_mvm_power_update_mac(mvm);
1138         iwl_mvm_mac_ctxt_remove(mvm, vif);
1139
1140 out_release:
1141         iwl_mvm_mac_ctxt_release(mvm, vif);
1142         mutex_unlock(&mvm->mutex);
1143 }
1144
1145 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1146 {
1147         return 0;
1148 }
1149
1150 struct iwl_mvm_mc_iter_data {
1151         struct iwl_mvm *mvm;
1152         int port_id;
1153 };
1154
1155 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1156                                       struct ieee80211_vif *vif)
1157 {
1158         struct iwl_mvm_mc_iter_data *data = _data;
1159         struct iwl_mvm *mvm = data->mvm;
1160         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1161         int ret, len;
1162
1163         /* if we don't have free ports, mcast frames will be dropped */
1164         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1165                 return;
1166
1167         if (vif->type != NL80211_IFTYPE_STATION ||
1168             !vif->bss_conf.assoc)
1169                 return;
1170
1171         cmd->port_id = data->port_id++;
1172         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1173         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1174
1175         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1176         if (ret)
1177                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1178 }
1179
1180 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1181 {
1182         struct iwl_mvm_mc_iter_data iter_data = {
1183                 .mvm = mvm,
1184         };
1185
1186         lockdep_assert_held(&mvm->mutex);
1187
1188         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1189                 return;
1190
1191         ieee80211_iterate_active_interfaces_atomic(
1192                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1193                 iwl_mvm_mc_iface_iterator, &iter_data);
1194 }
1195
1196 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1197                                      struct netdev_hw_addr_list *mc_list)
1198 {
1199         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1200         struct iwl_mcast_filter_cmd *cmd;
1201         struct netdev_hw_addr *addr;
1202         int addr_count = netdev_hw_addr_list_count(mc_list);
1203         bool pass_all = false;
1204         int len;
1205
1206         if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1207                 pass_all = true;
1208                 addr_count = 0;
1209         }
1210
1211         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1212         cmd = kzalloc(len, GFP_ATOMIC);
1213         if (!cmd)
1214                 return 0;
1215
1216         if (pass_all) {
1217                 cmd->pass_all = 1;
1218                 return (u64)(unsigned long)cmd;
1219         }
1220
1221         netdev_hw_addr_list_for_each(addr, mc_list) {
1222                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1223                                    cmd->count, addr->addr);
1224                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1225                        addr->addr, ETH_ALEN);
1226                 cmd->count++;
1227         }
1228
1229         return (u64)(unsigned long)cmd;
1230 }
1231
1232 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1233                                      unsigned int changed_flags,
1234                                      unsigned int *total_flags,
1235                                      u64 multicast)
1236 {
1237         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1238         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1239
1240         mutex_lock(&mvm->mutex);
1241
1242         /* replace previous configuration */
1243         kfree(mvm->mcast_filter_cmd);
1244         mvm->mcast_filter_cmd = cmd;
1245
1246         if (!cmd)
1247                 goto out;
1248
1249         iwl_mvm_recalc_multicast(mvm);
1250 out:
1251         mutex_unlock(&mvm->mutex);
1252         *total_flags = 0;
1253 }
1254
1255 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1256 struct iwl_bcast_iter_data {
1257         struct iwl_mvm *mvm;
1258         struct iwl_bcast_filter_cmd *cmd;
1259         u8 current_filter;
1260 };
1261
1262 static void
1263 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1264                          const struct iwl_fw_bcast_filter *in_filter,
1265                          struct iwl_fw_bcast_filter *out_filter)
1266 {
1267         struct iwl_fw_bcast_filter_attr *attr;
1268         int i;
1269
1270         memcpy(out_filter, in_filter, sizeof(*out_filter));
1271
1272         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1273                 attr = &out_filter->attrs[i];
1274
1275                 if (!attr->mask)
1276                         break;
1277
1278                 switch (attr->reserved1) {
1279                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1280                         if (vif->bss_conf.arp_addr_cnt != 1) {
1281                                 attr->mask = 0;
1282                                 continue;
1283                         }
1284
1285                         attr->val = vif->bss_conf.arp_addr_list[0];
1286                         break;
1287                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1288                         attr->val = *(__be32 *)&vif->addr[2];
1289                         break;
1290                 default:
1291                         break;
1292                 }
1293                 attr->reserved1 = 0;
1294                 out_filter->num_attrs++;
1295         }
1296 }
1297
1298 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1299                                           struct ieee80211_vif *vif)
1300 {
1301         struct iwl_bcast_iter_data *data = _data;
1302         struct iwl_mvm *mvm = data->mvm;
1303         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1304         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1305         struct iwl_fw_bcast_mac *bcast_mac;
1306         int i;
1307
1308         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1309                 return;
1310
1311         bcast_mac = &cmd->macs[mvmvif->id];
1312
1313         /*
1314          * enable filtering only for associated stations, but not for P2P
1315          * Clients
1316          */
1317         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1318             !vif->bss_conf.assoc)
1319                 return;
1320
1321         bcast_mac->default_discard = 1;
1322
1323         /* copy all configured filters */
1324         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1325                 /*
1326                  * Make sure we don't exceed our filters limit.
1327                  * if there is still a valid filter to be configured,
1328                  * be on the safe side and just allow bcast for this mac.
1329                  */
1330                 if (WARN_ON_ONCE(data->current_filter >=
1331                                  ARRAY_SIZE(cmd->filters))) {
1332                         bcast_mac->default_discard = 0;
1333                         bcast_mac->attached_filters = 0;
1334                         break;
1335                 }
1336
1337                 iwl_mvm_set_bcast_filter(vif,
1338                                          &mvm->bcast_filters[i],
1339                                          &cmd->filters[data->current_filter]);
1340
1341                 /* skip current filter if it contains no attributes */
1342                 if (!cmd->filters[data->current_filter].num_attrs)
1343                         continue;
1344
1345                 /* attach the filter to current mac */
1346                 bcast_mac->attached_filters |=
1347                                 cpu_to_le16(BIT(data->current_filter));
1348
1349                 data->current_filter++;
1350         }
1351 }
1352
1353 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1354                                     struct iwl_bcast_filter_cmd *cmd)
1355 {
1356         struct iwl_bcast_iter_data iter_data = {
1357                 .mvm = mvm,
1358                 .cmd = cmd,
1359         };
1360
1361         memset(cmd, 0, sizeof(*cmd));
1362         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1363         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1364
1365 #ifdef CONFIG_IWLWIFI_DEBUGFS
1366         /* use debugfs filters/macs if override is configured */
1367         if (mvm->dbgfs_bcast_filtering.override) {
1368                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1369                        sizeof(cmd->filters));
1370                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1371                        sizeof(cmd->macs));
1372                 return true;
1373         }
1374 #endif
1375
1376         /* if no filters are configured, do nothing */
1377         if (!mvm->bcast_filters)
1378                 return false;
1379
1380         /* configure and attach these filters for each associated sta vif */
1381         ieee80211_iterate_active_interfaces(
1382                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1383                 iwl_mvm_bcast_filter_iterator, &iter_data);
1384
1385         return true;
1386 }
1387 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1388                                           struct ieee80211_vif *vif)
1389 {
1390         struct iwl_bcast_filter_cmd cmd;
1391
1392         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1393                 return 0;
1394
1395         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1396                 return 0;
1397
1398         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1399                                     sizeof(cmd), &cmd);
1400 }
1401 #else
1402 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1403                                                  struct ieee80211_vif *vif)
1404 {
1405         return 0;
1406 }
1407 #endif
1408
1409 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1410                                              struct ieee80211_vif *vif,
1411                                              struct ieee80211_bss_conf *bss_conf,
1412                                              u32 changes)
1413 {
1414         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1415         int ret;
1416
1417         /*
1418          * Re-calculate the tsf id, as the master-slave relations depend on the
1419          * beacon interval, which was not known when the station interface was
1420          * added.
1421          */
1422         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1423                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1424
1425         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1426         if (ret)
1427                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1428
1429         if (changes & BSS_CHANGED_ASSOC) {
1430                 if (bss_conf->assoc) {
1431                         /* add quota for this interface */
1432                         ret = iwl_mvm_update_quotas(mvm, NULL);
1433                         if (ret) {
1434                                 IWL_ERR(mvm, "failed to update quotas\n");
1435                                 return;
1436                         }
1437
1438                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1439                                      &mvm->status)) {
1440                                 /*
1441                                  * If we're restarting then the firmware will
1442                                  * obviously have lost synchronisation with
1443                                  * the AP. It will attempt to synchronise by
1444                                  * itself, but we can make it more reliable by
1445                                  * scheduling a session protection time event.
1446                                  *
1447                                  * The firmware needs to receive a beacon to
1448                                  * catch up with synchronisation, use 110% of
1449                                  * the beacon interval.
1450                                  *
1451                                  * Set a large maximum delay to allow for more
1452                                  * than a single interface.
1453                                  */
1454                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1455                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1456                                                         5 * dur);
1457                         }
1458
1459                         iwl_mvm_sf_update(mvm, vif, false);
1460                         iwl_mvm_power_vif_assoc(mvm, vif);
1461                         if (vif->p2p)
1462                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1463                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1464                         /*
1465                          * If update fails - SF might be running in associated
1466                          * mode while disassociated - which is forbidden.
1467                          */
1468                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1469                                   "Failed to update SF upon disassociation\n");
1470
1471                         /* remove AP station now that the MAC is unassoc */
1472                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1473                         if (ret)
1474                                 IWL_ERR(mvm, "failed to remove AP station\n");
1475
1476                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1477                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1478                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1479                         /* remove quota for this interface */
1480                         ret = iwl_mvm_update_quotas(mvm, NULL);
1481                         if (ret)
1482                                 IWL_ERR(mvm, "failed to update quotas\n");
1483
1484                         if (vif->p2p)
1485                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1486                 }
1487
1488                 iwl_mvm_recalc_multicast(mvm);
1489                 iwl_mvm_configure_bcast_filter(mvm, vif);
1490
1491                 /* reset rssi values */
1492                 mvmvif->bf_data.ave_beacon_signal = 0;
1493
1494                 iwl_mvm_bt_coex_vif_change(mvm);
1495                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1496                                     IEEE80211_SMPS_AUTOMATIC);
1497         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1498                 /*
1499                  * We received a beacon _after_ association so
1500                  * remove the session protection.
1501                  */
1502                 iwl_mvm_remove_time_event(mvm, mvmvif,
1503                                           &mvmvif->time_event_data);
1504                 iwl_mvm_sf_update(mvm, vif, false);
1505                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1506         } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1507                               BSS_CHANGED_QOS)) {
1508                 ret = iwl_mvm_power_update_mac(mvm);
1509                 if (ret)
1510                         IWL_ERR(mvm, "failed to update power mode\n");
1511         }
1512         if (changes & BSS_CHANGED_TXPOWER) {
1513                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1514                                 bss_conf->txpower);
1515                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1516         }
1517
1518         if (changes & BSS_CHANGED_CQM) {
1519                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1520                 /* reset cqm events tracking */
1521                 mvmvif->bf_data.last_cqm_event = 0;
1522                 if (mvmvif->bf_data.bf_enabled) {
1523                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1524                         if (ret)
1525                                 IWL_ERR(mvm,
1526                                         "failed to update CQM thresholds\n");
1527                 }
1528         }
1529
1530         if (changes & BSS_CHANGED_ARP_FILTER) {
1531                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1532                 iwl_mvm_configure_bcast_filter(mvm, vif);
1533         }
1534 }
1535
1536 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1537                                  struct ieee80211_vif *vif)
1538 {
1539         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1540         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1541         int ret;
1542
1543         /*
1544          * iwl_mvm_mac_ctxt_add() might read directly from the device
1545          * (the system time), so make sure it is available.
1546          */
1547         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1548         if (ret)
1549                 return ret;
1550
1551         mutex_lock(&mvm->mutex);
1552
1553         /* Send the beacon template */
1554         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1555         if (ret)
1556                 goto out_unlock;
1557
1558         /*
1559          * Re-calculate the tsf id, as the master-slave relations depend on the
1560          * beacon interval, which was not known when the AP interface was added.
1561          */
1562         if (vif->type == NL80211_IFTYPE_AP)
1563                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1564
1565         /* Add the mac context */
1566         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1567         if (ret)
1568                 goto out_unlock;
1569
1570         /* Perform the binding */
1571         ret = iwl_mvm_binding_add_vif(mvm, vif);
1572         if (ret)
1573                 goto out_remove;
1574
1575         /* Send the bcast station. At this stage the TBTT and DTIM time events
1576          * are added and applied to the scheduler */
1577         ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1578         if (ret)
1579                 goto out_unbind;
1580
1581         /* must be set before quota calculations */
1582         mvmvif->ap_ibss_active = true;
1583
1584         /* power updated needs to be done before quotas */
1585         iwl_mvm_power_update_mac(mvm);
1586
1587         ret = iwl_mvm_update_quotas(mvm, NULL);
1588         if (ret)
1589                 goto out_quota_failed;
1590
1591         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1592         if (vif->p2p && mvm->p2p_device_vif)
1593                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1594
1595         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1596
1597         iwl_mvm_bt_coex_vif_change(mvm);
1598
1599         mutex_unlock(&mvm->mutex);
1600         return 0;
1601
1602 out_quota_failed:
1603         iwl_mvm_power_update_mac(mvm);
1604         mvmvif->ap_ibss_active = false;
1605         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1606 out_unbind:
1607         iwl_mvm_binding_remove_vif(mvm, vif);
1608 out_remove:
1609         iwl_mvm_mac_ctxt_remove(mvm, vif);
1610 out_unlock:
1611         mutex_unlock(&mvm->mutex);
1612         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1613         return ret;
1614 }
1615
1616 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1617                                  struct ieee80211_vif *vif)
1618 {
1619         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1620         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1621
1622         iwl_mvm_prepare_mac_removal(mvm, vif);
1623
1624         mutex_lock(&mvm->mutex);
1625
1626         /* Handle AP stop while in CSA */
1627         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1628                 iwl_mvm_remove_time_event(mvm, mvmvif,
1629                                           &mvmvif->time_event_data);
1630                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1631         }
1632
1633         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1634                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1635                 mvm->csa_tx_block_bcn_timeout = 0;
1636         }
1637
1638         mvmvif->ap_ibss_active = false;
1639         mvm->ap_last_beacon_gp2 = 0;
1640
1641         iwl_mvm_bt_coex_vif_change(mvm);
1642
1643         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1644
1645         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1646         if (vif->p2p && mvm->p2p_device_vif)
1647                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1648
1649         iwl_mvm_update_quotas(mvm, NULL);
1650         iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1651         iwl_mvm_binding_remove_vif(mvm, vif);
1652
1653         iwl_mvm_power_update_mac(mvm);
1654
1655         iwl_mvm_mac_ctxt_remove(mvm, vif);
1656
1657         mutex_unlock(&mvm->mutex);
1658 }
1659
1660 static void
1661 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1662                                  struct ieee80211_vif *vif,
1663                                  struct ieee80211_bss_conf *bss_conf,
1664                                  u32 changes)
1665 {
1666         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1667
1668         /* Changes will be applied when the AP/IBSS is started */
1669         if (!mvmvif->ap_ibss_active)
1670                 return;
1671
1672         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1673                        BSS_CHANGED_BANDWIDTH) &&
1674             iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1675                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1676
1677         /* Need to send a new beacon template to the FW */
1678         if (changes & BSS_CHANGED_BEACON &&
1679             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1680                 IWL_WARN(mvm, "Failed updating beacon data\n");
1681 }
1682
1683 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1684                                      struct ieee80211_vif *vif,
1685                                      struct ieee80211_bss_conf *bss_conf,
1686                                      u32 changes)
1687 {
1688         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1689
1690         /*
1691          * iwl_mvm_bss_info_changed_station() might call
1692          * iwl_mvm_protect_session(), which reads directly from
1693          * the device (the system time), so make sure it is available.
1694          */
1695         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1696                 return;
1697
1698         mutex_lock(&mvm->mutex);
1699
1700         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1701                 iwl_mvm_scan_offload_stop(mvm, true);
1702
1703         switch (vif->type) {
1704         case NL80211_IFTYPE_STATION:
1705                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1706                 break;
1707         case NL80211_IFTYPE_AP:
1708         case NL80211_IFTYPE_ADHOC:
1709                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1710                 break;
1711         default:
1712                 /* shouldn't happen */
1713                 WARN_ON_ONCE(1);
1714         }
1715
1716         mutex_unlock(&mvm->mutex);
1717         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1718 }
1719
1720 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1721                                           enum iwl_scan_status scan_type)
1722 {
1723         int ret;
1724         bool wait_for_handlers = false;
1725
1726         mutex_lock(&mvm->mutex);
1727
1728         if (mvm->scan_status != scan_type) {
1729                 ret = 0;
1730                 /* make sure there are no pending notifications */
1731                 wait_for_handlers = true;
1732                 goto out;
1733         }
1734
1735         switch (scan_type) {
1736         case IWL_MVM_SCAN_SCHED:
1737                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1738                 break;
1739         case IWL_MVM_SCAN_OS:
1740                 ret = iwl_mvm_cancel_scan(mvm);
1741                 break;
1742         case IWL_MVM_SCAN_NONE:
1743         default:
1744                 WARN_ON_ONCE(1);
1745                 ret = -EINVAL;
1746                 break;
1747         }
1748         if (ret)
1749                 goto out;
1750
1751         wait_for_handlers = true;
1752 out:
1753         mutex_unlock(&mvm->mutex);
1754
1755         /* make sure we consume the completion notification */
1756         if (wait_for_handlers)
1757                 iwl_mvm_wait_for_async_handlers(mvm);
1758
1759         return ret;
1760 }
1761 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1762                                struct ieee80211_vif *vif,
1763                                struct ieee80211_scan_request *hw_req)
1764 {
1765         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1766         struct cfg80211_scan_request *req = &hw_req->req;
1767         int ret;
1768
1769         if (req->n_channels == 0 ||
1770             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1771                 return -EINVAL;
1772
1773         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1774         if (ret)
1775                 return ret;
1776
1777         mutex_lock(&mvm->mutex);
1778
1779         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1780                 ret = -EBUSY;
1781                 goto out;
1782         }
1783
1784         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1785
1786         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1787                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1788         else
1789                 ret = iwl_mvm_scan_request(mvm, vif, req);
1790
1791         if (ret)
1792                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1793 out:
1794         mutex_unlock(&mvm->mutex);
1795         return ret;
1796 }
1797
1798 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1799                                        struct ieee80211_vif *vif)
1800 {
1801         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1802
1803         mutex_lock(&mvm->mutex);
1804
1805         iwl_mvm_cancel_scan(mvm);
1806
1807         mutex_unlock(&mvm->mutex);
1808 }
1809
1810 static void
1811 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1812                                   struct ieee80211_sta *sta, u16 tids,
1813                                   int num_frames,
1814                                   enum ieee80211_frame_release_type reason,
1815                                   bool more_data)
1816 {
1817         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1818
1819         /* Called when we need to transmit (a) frame(s) from mac80211 */
1820
1821         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1822                                           tids, more_data, false);
1823 }
1824
1825 static void
1826 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1827                                     struct ieee80211_sta *sta, u16 tids,
1828                                     int num_frames,
1829                                     enum ieee80211_frame_release_type reason,
1830                                     bool more_data)
1831 {
1832         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1833
1834         /* Called when we need to transmit (a) frame(s) from agg queue */
1835
1836         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1837                                           tids, more_data, true);
1838 }
1839
1840 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1841                                    struct ieee80211_vif *vif,
1842                                    enum sta_notify_cmd cmd,
1843                                    struct ieee80211_sta *sta)
1844 {
1845         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1846         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1847         int tid;
1848
1849         switch (cmd) {
1850         case STA_NOTIFY_SLEEP:
1851                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1852                         ieee80211_sta_block_awake(hw, sta, true);
1853                 spin_lock_bh(&mvmsta->lock);
1854                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1855                         struct iwl_mvm_tid_data *tid_data;
1856
1857                         tid_data = &mvmsta->tid_data[tid];
1858                         if (tid_data->state != IWL_AGG_ON &&
1859                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1860                                 continue;
1861                         if (iwl_mvm_tid_queued(tid_data) == 0)
1862                                 continue;
1863                         ieee80211_sta_set_buffered(sta, tid, true);
1864                 }
1865                 spin_unlock_bh(&mvmsta->lock);
1866                 /*
1867                  * The fw updates the STA to be asleep. Tx packets on the Tx
1868                  * queues to this station will not be transmitted. The fw will
1869                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1870                  */
1871                 break;
1872         case STA_NOTIFY_AWAKE:
1873                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1874                         break;
1875                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1876                 break;
1877         default:
1878                 break;
1879         }
1880 }
1881
1882 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1883                                        struct ieee80211_vif *vif,
1884                                        struct ieee80211_sta *sta)
1885 {
1886         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1887         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1888
1889         /*
1890          * This is called before mac80211 does RCU synchronisation,
1891          * so here we already invalidate our internal RCU-protected
1892          * station pointer. The rest of the code will thus no longer
1893          * be able to find the station this way, and we don't rely
1894          * on further RCU synchronisation after the sta_state()
1895          * callback deleted the station.
1896          */
1897         mutex_lock(&mvm->mutex);
1898         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1899                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1900                                    ERR_PTR(-ENOENT));
1901         mutex_unlock(&mvm->mutex);
1902 }
1903
1904 int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1905 {
1906         struct ieee80211_sta *sta;
1907         struct iwl_mvm_sta *mvmsta;
1908         int count = 0;
1909         int i;
1910
1911         lockdep_assert_held(&mvm->mutex);
1912
1913         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1914                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1915                                                 lockdep_is_held(&mvm->mutex));
1916                 if (!sta || IS_ERR(sta) || !sta->tdls)
1917                         continue;
1918
1919                 if (vif) {
1920                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1921                         if (mvmsta->vif != vif)
1922                                 continue;
1923                 }
1924
1925                 count++;
1926         }
1927
1928         return count;
1929 }
1930
1931 static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
1932                                       struct ieee80211_vif *vif,
1933                                       bool sta_added)
1934 {
1935         int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
1936
1937         /*
1938          * Disable ps when the first TDLS sta is added and re-enable it
1939          * when the last TDLS sta is removed
1940          */
1941         if ((tdls_sta_cnt == 1 && sta_added) ||
1942             (tdls_sta_cnt == 0 && !sta_added))
1943                 iwl_mvm_power_update_mac(mvm);
1944 }
1945
1946 static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
1947 {
1948         struct ieee80211_sta *sta;
1949         struct iwl_mvm_sta *mvmsta;
1950         int i;
1951
1952         lockdep_assert_held(&mvm->mutex);
1953
1954         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1955                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1956                                                 lockdep_is_held(&mvm->mutex));
1957                 if (!sta || IS_ERR(sta) || !sta->tdls)
1958                         continue;
1959
1960                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1961                 ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
1962                                 NL80211_TDLS_TEARDOWN,
1963                                 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
1964                                 GFP_KERNEL);
1965         }
1966 }
1967
1968 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1969                                  struct ieee80211_vif *vif,
1970                                  struct ieee80211_sta *sta,
1971                                  enum ieee80211_sta_state old_state,
1972                                  enum ieee80211_sta_state new_state)
1973 {
1974         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1975         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1976         int ret;
1977
1978         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1979                            sta->addr, old_state, new_state);
1980
1981         /* this would be a mac80211 bug ... but don't crash */
1982         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1983                 return -EINVAL;
1984
1985         /* if a STA is being removed, reuse its ID */
1986         flush_work(&mvm->sta_drained_wk);
1987
1988         mutex_lock(&mvm->mutex);
1989         if (old_state == IEEE80211_STA_NOTEXIST &&
1990             new_state == IEEE80211_STA_NONE) {
1991                 /*
1992                  * Firmware bug - it'll crash if the beacon interval is less
1993                  * than 16. We can't avoid connecting at all, so refuse the
1994                  * station state change, this will cause mac80211 to abandon
1995                  * attempts to connect to this AP, and eventually wpa_s will
1996                  * blacklist the AP...
1997                  */
1998                 if (vif->type == NL80211_IFTYPE_STATION &&
1999                     vif->bss_conf.beacon_int < 16) {
2000                         IWL_ERR(mvm,
2001                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2002                                 sta->addr, vif->bss_conf.beacon_int);
2003                         ret = -EINVAL;
2004                         goto out_unlock;
2005                 }
2006
2007                 if (sta->tdls &&
2008                     (vif->p2p ||
2009                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2010                                                 IWL_MVM_TDLS_STA_COUNT ||
2011                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2012                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2013                         ret = -EBUSY;
2014                         goto out_unlock;
2015                 }
2016
2017                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2018                 if (sta->tdls && ret == 0)
2019                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2020         } else if (old_state == IEEE80211_STA_NONE &&
2021                    new_state == IEEE80211_STA_AUTH) {
2022                 /*
2023                  * EBS may be disabled due to previous failures reported by FW.
2024                  * Reset EBS status here assuming environment has been changed.
2025                  */
2026                 mvm->last_ebs_successful = true;
2027                 ret = 0;
2028         } else if (old_state == IEEE80211_STA_AUTH &&
2029                    new_state == IEEE80211_STA_ASSOC) {
2030                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2031                 if (ret == 0)
2032                         iwl_mvm_rs_rate_init(mvm, sta,
2033                                              mvmvif->phy_ctxt->channel->band,
2034                                              true);
2035         } else if (old_state == IEEE80211_STA_ASSOC &&
2036                    new_state == IEEE80211_STA_AUTHORIZED) {
2037
2038                 /* we don't support TDLS during DCM */
2039                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2040                         iwl_mvm_teardown_tdls_peers(mvm);
2041
2042                 /* enable beacon filtering */
2043                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2044                 ret = 0;
2045         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2046                    new_state == IEEE80211_STA_ASSOC) {
2047                 /* disable beacon filtering */
2048                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2049                 ret = 0;
2050         } else if (old_state == IEEE80211_STA_ASSOC &&
2051                    new_state == IEEE80211_STA_AUTH) {
2052                 ret = 0;
2053         } else if (old_state == IEEE80211_STA_AUTH &&
2054                    new_state == IEEE80211_STA_NONE) {
2055                 ret = 0;
2056         } else if (old_state == IEEE80211_STA_NONE &&
2057                    new_state == IEEE80211_STA_NOTEXIST) {
2058                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2059                 if (sta->tdls)
2060                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2061         } else {
2062                 ret = -EIO;
2063         }
2064  out_unlock:
2065         mutex_unlock(&mvm->mutex);
2066
2067         return ret;
2068 }
2069
2070 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2071 {
2072         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2073
2074         mvm->rts_threshold = value;
2075
2076         return 0;
2077 }
2078
2079 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2080                                   struct ieee80211_vif *vif,
2081                                   struct ieee80211_sta *sta, u32 changed)
2082 {
2083         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2084
2085         if (vif->type == NL80211_IFTYPE_STATION &&
2086             changed & IEEE80211_RC_NSS_CHANGED)
2087                 iwl_mvm_sf_update(mvm, vif, false);
2088 }
2089
2090 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2091                                struct ieee80211_vif *vif, u16 ac,
2092                                const struct ieee80211_tx_queue_params *params)
2093 {
2094         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2095         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2096
2097         mvmvif->queue_params[ac] = *params;
2098
2099         /*
2100          * No need to update right away, we'll get BSS_CHANGED_QOS
2101          * The exception is P2P_DEVICE interface which needs immediate update.
2102          */
2103         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2104                 int ret;
2105
2106                 mutex_lock(&mvm->mutex);
2107                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2108                 mutex_unlock(&mvm->mutex);
2109                 return ret;
2110         }
2111         return 0;
2112 }
2113
2114 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2115                                       struct ieee80211_vif *vif)
2116 {
2117         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2118         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2119                            200 + vif->bss_conf.beacon_int);
2120         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2121                                100 + vif->bss_conf.beacon_int);
2122
2123         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2124                 return;
2125
2126         /*
2127          * iwl_mvm_protect_session() reads directly from the device
2128          * (the system time), so make sure it is available.
2129          */
2130         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2131                 return;
2132
2133         mutex_lock(&mvm->mutex);
2134         /* Try really hard to protect the session and hear a beacon */
2135         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
2136         mutex_unlock(&mvm->mutex);
2137
2138         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2139 }
2140
2141 static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
2142                                                   struct ieee80211_vif *vif)
2143 {
2144         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2145         u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
2146
2147         /*
2148          * iwl_mvm_protect_session() reads directly from the device
2149          * (the system time), so make sure it is available.
2150          */
2151         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
2152                 return;
2153
2154         mutex_lock(&mvm->mutex);
2155         /* Protect the session to hear the TDLS setup response on the channel */
2156         iwl_mvm_protect_session(mvm, vif, duration, duration, 100);
2157         mutex_unlock(&mvm->mutex);
2158
2159         iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2160 }
2161
2162 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2163                                         struct ieee80211_vif *vif,
2164                                         struct cfg80211_sched_scan_request *req,
2165                                         struct ieee80211_scan_ies *ies)
2166 {
2167         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2168         int ret;
2169
2170         ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2171         if (ret)
2172                 return ret;
2173
2174         mutex_lock(&mvm->mutex);
2175
2176         if (!iwl_mvm_is_idle(mvm)) {
2177                 ret = -EBUSY;
2178                 goto out;
2179         }
2180
2181         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2182                 ret = -EBUSY;
2183                 goto out;
2184         }
2185
2186         mvm->scan_status = IWL_MVM_SCAN_SCHED;
2187
2188         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2189                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2190                 if (ret)
2191                         goto err;
2192         }
2193
2194         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2195         if (ret)
2196                 goto err;
2197
2198         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2199                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2200         else
2201                 ret = iwl_mvm_sched_scan_start(mvm, req);
2202
2203         if (!ret)
2204                 goto out;
2205 err:
2206         mvm->scan_status = IWL_MVM_SCAN_NONE;
2207 out:
2208         mutex_unlock(&mvm->mutex);
2209         return ret;
2210 }
2211
2212 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2213                                        struct ieee80211_vif *vif)
2214 {
2215         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2216         int ret;
2217
2218         mutex_lock(&mvm->mutex);
2219         ret = iwl_mvm_scan_offload_stop(mvm, false);
2220         mutex_unlock(&mvm->mutex);
2221         iwl_mvm_wait_for_async_handlers(mvm);
2222
2223         return ret;
2224 }
2225
2226 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2227                                enum set_key_cmd cmd,
2228                                struct ieee80211_vif *vif,
2229                                struct ieee80211_sta *sta,
2230                                struct ieee80211_key_conf *key)
2231 {
2232         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2233         int ret;
2234
2235         if (iwlwifi_mod_params.sw_crypto) {
2236                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2237                 return -EOPNOTSUPP;
2238         }
2239
2240         switch (key->cipher) {
2241         case WLAN_CIPHER_SUITE_TKIP:
2242                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2243                 /* fall-through */
2244         case WLAN_CIPHER_SUITE_CCMP:
2245                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2246                 break;
2247         case WLAN_CIPHER_SUITE_AES_CMAC:
2248                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2249                 break;
2250         case WLAN_CIPHER_SUITE_WEP40:
2251         case WLAN_CIPHER_SUITE_WEP104:
2252                 /*
2253                  * Support for TX only, at least for now, so accept
2254                  * the key and do nothing else. Then mac80211 will
2255                  * pass it for TX but we don't have to use it for RX.
2256                  */
2257                 return 0;
2258         default:
2259                 /* currently FW supports only one optional cipher scheme */
2260                 if (hw->n_cipher_schemes &&
2261                     hw->cipher_schemes->cipher == key->cipher)
2262                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2263                 else
2264                         return -EOPNOTSUPP;
2265         }
2266
2267         mutex_lock(&mvm->mutex);
2268
2269         switch (cmd) {
2270         case SET_KEY:
2271                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2272                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2273                         /*
2274                          * GTK on AP interface is a TX-only key, return 0;
2275                          * on IBSS they're per-station and because we're lazy
2276                          * we don't support them for RX, so do the same.
2277                          */
2278                         ret = 0;
2279                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2280                         break;
2281                 }
2282
2283                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2284                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2285                 if (ret) {
2286                         IWL_WARN(mvm, "set key failed\n");
2287                         /*
2288                          * can't add key for RX, but we don't need it
2289                          * in the device for TX so still return 0
2290                          */
2291                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2292                         ret = 0;
2293                 }
2294
2295                 break;
2296         case DISABLE_KEY:
2297                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2298                         ret = 0;
2299                         break;
2300                 }
2301
2302                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2303                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2304                 break;
2305         default:
2306                 ret = -EINVAL;
2307         }
2308
2309         mutex_unlock(&mvm->mutex);
2310         return ret;
2311 }
2312
2313 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2314                                         struct ieee80211_vif *vif,
2315                                         struct ieee80211_key_conf *keyconf,
2316                                         struct ieee80211_sta *sta,
2317                                         u32 iv32, u16 *phase1key)
2318 {
2319         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2320
2321         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2322                 return;
2323
2324         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2325 }
2326
2327
2328 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2329                                struct iwl_rx_packet *pkt, void *data)
2330 {
2331         struct iwl_mvm *mvm =
2332                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2333         struct iwl_hs20_roc_res *resp;
2334         int resp_len = iwl_rx_packet_payload_len(pkt);
2335         struct iwl_mvm_time_event_data *te_data = data;
2336
2337         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2338                 return true;
2339
2340         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2341                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2342                 return true;
2343         }
2344
2345         resp = (void *)pkt->data;
2346
2347         IWL_DEBUG_TE(mvm,
2348                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2349                      resp->status, resp->event_unique_id);
2350
2351         te_data->uid = le32_to_cpu(resp->event_unique_id);
2352         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2353                      te_data->uid);
2354
2355         spin_lock_bh(&mvm->time_event_lock);
2356         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2357         spin_unlock_bh(&mvm->time_event_lock);
2358
2359         return true;
2360 }
2361
2362 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2363 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2364                                     struct ieee80211_channel *channel,
2365                                     struct ieee80211_vif *vif,
2366                                     int duration)
2367 {
2368         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2369         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2370         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2371         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2372         struct iwl_notification_wait wait_time_event;
2373         struct iwl_hs20_roc_req aux_roc_req = {
2374                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2375                 .id_and_color =
2376                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2377                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2378                 /* Set the channel info data */
2379                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2380                         PHY_BAND_24 : PHY_BAND_5,
2381                 .channel_info.channel = channel->hw_value,
2382                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2383                 /* Set the time and duration */
2384                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2385                 .apply_time_max_delay =
2386                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2387                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2388          };
2389
2390         /* Set the node address */
2391         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2392
2393         te_data->vif = vif;
2394         te_data->duration = duration;
2395         te_data->id = HOT_SPOT_CMD;
2396
2397         lockdep_assert_held(&mvm->mutex);
2398
2399         spin_lock_bh(&mvm->time_event_lock);
2400         list_add_tail(&te_data->list, &mvm->time_event_list);
2401         spin_unlock_bh(&mvm->time_event_lock);
2402
2403         /*
2404          * Use a notification wait, which really just processes the
2405          * command response and doesn't wait for anything, in order
2406          * to be able to process the response and get the UID inside
2407          * the RX path. Using CMD_WANT_SKB doesn't work because it
2408          * stores the buffer and then wakes up this thread, by which
2409          * time another notification (that the time event started)
2410          * might already be processed unsuccessfully.
2411          */
2412         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2413                                    time_event_response,
2414                                    ARRAY_SIZE(time_event_response),
2415                                    iwl_mvm_rx_aux_roc, te_data);
2416
2417         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2418                                    &aux_roc_req);
2419
2420         if (res) {
2421                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2422                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2423                 goto out_clear_te;
2424         }
2425
2426         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2427         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2428         /* should never fail */
2429         WARN_ON_ONCE(res);
2430
2431         if (res) {
2432  out_clear_te:
2433                 spin_lock_bh(&mvm->time_event_lock);
2434                 iwl_mvm_te_clear_data(mvm, te_data);
2435                 spin_unlock_bh(&mvm->time_event_lock);
2436         }
2437
2438         return res;
2439 }
2440
2441 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2442                        struct ieee80211_vif *vif,
2443                        struct ieee80211_channel *channel,
2444                        int duration,
2445                        enum ieee80211_roc_type type)
2446 {
2447         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2448         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2449         struct cfg80211_chan_def chandef;
2450         struct iwl_mvm_phy_ctxt *phy_ctxt;
2451         int ret, i;
2452
2453         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2454                            duration, type);
2455
2456         switch (vif->type) {
2457         case NL80211_IFTYPE_STATION:
2458                 /* Use aux roc framework (HS20) */
2459                 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2460                                                vif, duration);
2461                 return ret;
2462         case NL80211_IFTYPE_P2P_DEVICE:
2463                 /* handle below */
2464                 break;
2465         default:
2466                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2467                 return -EINVAL;
2468         }
2469
2470         mutex_lock(&mvm->mutex);
2471
2472         for (i = 0; i < NUM_PHY_CTX; i++) {
2473                 phy_ctxt = &mvm->phy_ctxts[i];
2474                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2475                         continue;
2476
2477                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2478                         /*
2479                          * Unbind the P2P_DEVICE from the current PHY context,
2480                          * and if the PHY context is not used remove it.
2481                          */
2482                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2483                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2484                                 goto out_unlock;
2485
2486                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2487
2488                         /* Bind the P2P_DEVICE to the current PHY Context */
2489                         mvmvif->phy_ctxt = phy_ctxt;
2490
2491                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2492                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2493                                 goto out_unlock;
2494
2495                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2496                         goto schedule_time_event;
2497                 }
2498         }
2499
2500         /* Need to update the PHY context only if the ROC channel changed */
2501         if (channel == mvmvif->phy_ctxt->channel)
2502                 goto schedule_time_event;
2503
2504         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2505
2506         /*
2507          * Change the PHY context configuration as it is currently referenced
2508          * only by the P2P Device MAC
2509          */
2510         if (mvmvif->phy_ctxt->ref == 1) {
2511                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2512                                                &chandef, 1, 1);
2513                 if (ret)
2514                         goto out_unlock;
2515         } else {
2516                 /*
2517                  * The PHY context is shared with other MACs. Need to remove the
2518                  * P2P Device from the binding, allocate an new PHY context and
2519                  * create a new binding
2520                  */
2521                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2522                 if (!phy_ctxt) {
2523                         ret = -ENOSPC;
2524                         goto out_unlock;
2525                 }
2526
2527                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2528                                                1, 1);
2529                 if (ret) {
2530                         IWL_ERR(mvm, "Failed to change PHY context\n");
2531                         goto out_unlock;
2532                 }
2533
2534                 /* Unbind the P2P_DEVICE from the current PHY context */
2535                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2536                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2537                         goto out_unlock;
2538
2539                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2540
2541                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2542                 mvmvif->phy_ctxt = phy_ctxt;
2543
2544                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2545                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2546                         goto out_unlock;
2547
2548                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2549         }
2550
2551 schedule_time_event:
2552         /* Schedule the time events */
2553         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2554
2555 out_unlock:
2556         mutex_unlock(&mvm->mutex);
2557         IWL_DEBUG_MAC80211(mvm, "leave\n");
2558         return ret;
2559 }
2560
2561 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2562 {
2563         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2564
2565         IWL_DEBUG_MAC80211(mvm, "enter\n");
2566
2567         mutex_lock(&mvm->mutex);
2568         iwl_mvm_stop_p2p_roc(mvm);
2569         mutex_unlock(&mvm->mutex);
2570
2571         IWL_DEBUG_MAC80211(mvm, "leave\n");
2572         return 0;
2573 }
2574
2575 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2576                                  struct ieee80211_chanctx_conf *ctx)
2577 {
2578         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2579         struct iwl_mvm_phy_ctxt *phy_ctxt;
2580         int ret;
2581
2582         lockdep_assert_held(&mvm->mutex);
2583
2584         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2585
2586         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2587         if (!phy_ctxt) {
2588                 ret = -ENOSPC;
2589                 goto out;
2590         }
2591
2592         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2593                                        ctx->rx_chains_static,
2594                                        ctx->rx_chains_dynamic);
2595         if (ret) {
2596                 IWL_ERR(mvm, "Failed to add PHY context\n");
2597                 goto out;
2598         }
2599
2600         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2601         *phy_ctxt_id = phy_ctxt->id;
2602 out:
2603         return ret;
2604 }
2605
2606 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2607                                struct ieee80211_chanctx_conf *ctx)
2608 {
2609         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2610         int ret;
2611
2612         mutex_lock(&mvm->mutex);
2613         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2614         mutex_unlock(&mvm->mutex);
2615
2616         return ret;
2617 }
2618
2619 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2620                                      struct ieee80211_chanctx_conf *ctx)
2621 {
2622         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2623         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2624
2625         lockdep_assert_held(&mvm->mutex);
2626
2627         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2628 }
2629
2630 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2631                                    struct ieee80211_chanctx_conf *ctx)
2632 {
2633         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2634
2635         mutex_lock(&mvm->mutex);
2636         __iwl_mvm_remove_chanctx(mvm, ctx);
2637         mutex_unlock(&mvm->mutex);
2638 }
2639
2640 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2641                                    struct ieee80211_chanctx_conf *ctx,
2642                                    u32 changed)
2643 {
2644         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2645         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2646         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2647
2648         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2649                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2650                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2651                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2652                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2653                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2654                       phy_ctxt->ref, changed))
2655                 return;
2656
2657         mutex_lock(&mvm->mutex);
2658         iwl_mvm_bt_coex_vif_change(mvm);
2659         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2660                                  ctx->rx_chains_static,
2661                                  ctx->rx_chains_dynamic);
2662         mutex_unlock(&mvm->mutex);
2663 }
2664
2665 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2666                                         struct ieee80211_vif *vif,
2667                                         struct ieee80211_chanctx_conf *ctx,
2668                                         bool switching_chanctx)
2669 {
2670         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2671         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2672         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2673         int ret;
2674
2675         lockdep_assert_held(&mvm->mutex);
2676
2677         mvmvif->phy_ctxt = phy_ctxt;
2678
2679         switch (vif->type) {
2680         case NL80211_IFTYPE_AP:
2681                 /* Unless it's a CSA flow we have nothing to do here */
2682                 if (vif->csa_active) {
2683                         mvmvif->ap_ibss_active = true;
2684                         break;
2685                 }
2686         case NL80211_IFTYPE_ADHOC:
2687                 /*
2688                  * The AP binding flow is handled as part of the start_ap flow
2689                  * (in bss_info_changed), similarly for IBSS.
2690                  */
2691                 ret = 0;
2692                 goto out;
2693         case NL80211_IFTYPE_STATION:
2694         case NL80211_IFTYPE_MONITOR:
2695                 break;
2696         default:
2697                 ret = -EINVAL;
2698                 goto out;
2699         }
2700
2701         ret = iwl_mvm_binding_add_vif(mvm, vif);
2702         if (ret)
2703                 goto out;
2704
2705         /*
2706          * Power state must be updated before quotas,
2707          * otherwise fw will complain.
2708          */
2709         iwl_mvm_power_update_mac(mvm);
2710
2711         /* Setting the quota at this stage is only required for monitor
2712          * interfaces. For the other types, the bss_info changed flow
2713          * will handle quota settings.
2714          */
2715         if (vif->type == NL80211_IFTYPE_MONITOR) {
2716                 mvmvif->monitor_active = true;
2717                 ret = iwl_mvm_update_quotas(mvm, NULL);
2718                 if (ret)
2719                         goto out_remove_binding;
2720         }
2721
2722         /* Handle binding during CSA */
2723         if ((vif->type == NL80211_IFTYPE_AP) ||
2724             (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2725                 iwl_mvm_update_quotas(mvm, NULL);
2726                 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2727         }
2728
2729         goto out;
2730
2731 out_remove_binding:
2732         iwl_mvm_binding_remove_vif(mvm, vif);
2733         iwl_mvm_power_update_mac(mvm);
2734 out:
2735         if (ret)
2736                 mvmvif->phy_ctxt = NULL;
2737         return ret;
2738 }
2739 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2740                                       struct ieee80211_vif *vif,
2741                                       struct ieee80211_chanctx_conf *ctx)
2742 {
2743         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2744         int ret;
2745
2746         mutex_lock(&mvm->mutex);
2747         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2748         mutex_unlock(&mvm->mutex);
2749
2750         return ret;
2751 }
2752
2753 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2754                                            struct ieee80211_vif *vif,
2755                                            struct ieee80211_chanctx_conf *ctx,
2756                                            bool switching_chanctx)
2757 {
2758         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2759         struct ieee80211_vif *disabled_vif = NULL;
2760
2761         lockdep_assert_held(&mvm->mutex);
2762
2763         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2764
2765         switch (vif->type) {
2766         case NL80211_IFTYPE_ADHOC:
2767                 goto out;
2768         case NL80211_IFTYPE_MONITOR:
2769                 mvmvif->monitor_active = false;
2770                 break;
2771         case NL80211_IFTYPE_AP:
2772                 /* This part is triggered only during CSA */
2773                 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2774                         goto out;
2775
2776                 /* Set CS bit on all the stations */
2777                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2778
2779                 /* Save blocked iface, the timeout is set on the next beacon */
2780                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2781
2782                 mvmvif->ap_ibss_active = false;
2783                 break;
2784         case NL80211_IFTYPE_STATION:
2785                 if (!switching_chanctx)
2786                         break;
2787
2788                 disabled_vif = vif;
2789
2790                 iwl_mvm_mac_ctxt_changed(mvm, vif, true);
2791                 break;
2792         default:
2793                 break;
2794         }
2795
2796         iwl_mvm_update_quotas(mvm, disabled_vif);
2797         iwl_mvm_binding_remove_vif(mvm, vif);
2798
2799 out:
2800         mvmvif->phy_ctxt = NULL;
2801         iwl_mvm_power_update_mac(mvm);
2802 }
2803
2804 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2805                                          struct ieee80211_vif *vif,
2806                                          struct ieee80211_chanctx_conf *ctx)
2807 {
2808         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2809
2810         mutex_lock(&mvm->mutex);
2811         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2812         mutex_unlock(&mvm->mutex);
2813 }
2814
2815 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2816                                       struct ieee80211_vif_chanctx_switch *vifs,
2817                                       int n_vifs,
2818                                       enum ieee80211_chanctx_switch_mode mode)
2819 {
2820         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2821         int ret;
2822
2823         /* we only support SWAP_CONTEXTS and with a single-vif right now */
2824         if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2825                 return -EOPNOTSUPP;
2826
2827         mutex_lock(&mvm->mutex);
2828         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2829         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2830
2831         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2832         if (ret) {
2833                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2834                 goto out_reassign;
2835         }
2836
2837         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2838                                            true);
2839         if (ret) {
2840                 IWL_ERR(mvm,
2841                         "failed to assign new_ctx during channel switch\n");
2842                 goto out_remove;
2843         }
2844
2845         goto out;
2846
2847 out_remove:
2848         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2849
2850 out_reassign:
2851         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2852         if (ret) {
2853                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2854                 goto out_restart;
2855         }
2856
2857         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2858                                            true);
2859         if (ret) {
2860                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2861                 goto out_restart;
2862         }
2863
2864         goto out;
2865
2866 out_restart:
2867         /* things keep failing, better restart the hw */
2868         iwl_mvm_nic_restart(mvm, false);
2869
2870 out:
2871         mutex_unlock(&mvm->mutex);
2872         return ret;
2873 }
2874
2875 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2876                            struct ieee80211_sta *sta,
2877                            bool set)
2878 {
2879         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2880         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2881
2882         if (!mvm_sta || !mvm_sta->vif) {
2883                 IWL_ERR(mvm, "Station is not associated to a vif\n");
2884                 return -EINVAL;
2885         }
2886
2887         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2888 }
2889
2890 #ifdef CONFIG_NL80211_TESTMODE
2891 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2892         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2893         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2894         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2895 };
2896
2897 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2898                                       struct ieee80211_vif *vif,
2899                                       void *data, int len)
2900 {
2901         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2902         int err;
2903         u32 noa_duration;
2904
2905         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2906         if (err)
2907                 return err;
2908
2909         if (!tb[IWL_MVM_TM_ATTR_CMD])
2910                 return -EINVAL;
2911
2912         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2913         case IWL_MVM_TM_CMD_SET_NOA:
2914                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2915                     !vif->bss_conf.enable_beacon ||
2916                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2917                         return -EINVAL;
2918
2919                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2920                 if (noa_duration >= vif->bss_conf.beacon_int)
2921                         return -EINVAL;
2922
2923                 mvm->noa_duration = noa_duration;
2924                 mvm->noa_vif = vif;
2925
2926                 return iwl_mvm_update_quotas(mvm, NULL);
2927         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2928                 /* must be associated client vif - ignore authorized */
2929                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2930                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2931                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2932                         return -EINVAL;
2933
2934                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2935                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2936                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2937         }
2938
2939         return -EOPNOTSUPP;
2940 }
2941
2942 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2943                                     struct ieee80211_vif *vif,
2944                                     void *data, int len)
2945 {
2946         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2947         int err;
2948
2949         mutex_lock(&mvm->mutex);
2950         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2951         mutex_unlock(&mvm->mutex);
2952
2953         return err;
2954 }
2955 #endif
2956
2957 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2958                                           struct ieee80211_vif *vif,
2959                                           struct cfg80211_chan_def *chandef)
2960 {
2961         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2962         struct ieee80211_vif *csa_vif;
2963
2964         mutex_lock(&mvm->mutex);
2965
2966         csa_vif = rcu_dereference_protected(mvm->csa_vif,
2967                                             lockdep_is_held(&mvm->mutex));
2968         if (WARN(csa_vif && csa_vif->csa_active,
2969                  "Another CSA is already in progress"))
2970                 goto out_unlock;
2971
2972         IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2973                            chandef->center_freq1);
2974         rcu_assign_pointer(mvm->csa_vif, vif);
2975
2976 out_unlock:
2977         mutex_unlock(&mvm->mutex);
2978 }
2979
2980 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2981                               struct ieee80211_vif *vif, u32 queues, bool drop)
2982 {
2983         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2984         struct iwl_mvm_vif *mvmvif;
2985         struct iwl_mvm_sta *mvmsta;
2986
2987         if (!vif || vif->type != NL80211_IFTYPE_STATION)
2988                 return;
2989
2990         mutex_lock(&mvm->mutex);
2991         mvmvif = iwl_mvm_vif_from_mac80211(vif);
2992         mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
2993
2994         if (WARN_ON_ONCE(!mvmsta))
2995                 goto done;
2996
2997         if (drop) {
2998                 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
2999                         IWL_ERR(mvm, "flush request fail\n");
3000         } else {
3001                 iwl_trans_wait_tx_queue_empty(mvm->trans,
3002                                               mvmsta->tfd_queue_msk);
3003         }
3004 done:
3005         mutex_unlock(&mvm->mutex);
3006 }
3007
3008 const struct ieee80211_ops iwl_mvm_hw_ops = {
3009         .tx = iwl_mvm_mac_tx,
3010         .ampdu_action = iwl_mvm_mac_ampdu_action,
3011         .start = iwl_mvm_mac_start,
3012         .restart_complete = iwl_mvm_mac_restart_complete,
3013         .stop = iwl_mvm_mac_stop,
3014         .add_interface = iwl_mvm_mac_add_interface,
3015         .remove_interface = iwl_mvm_mac_remove_interface,
3016         .config = iwl_mvm_mac_config,
3017         .prepare_multicast = iwl_mvm_prepare_multicast,
3018         .configure_filter = iwl_mvm_configure_filter,
3019         .bss_info_changed = iwl_mvm_bss_info_changed,
3020         .hw_scan = iwl_mvm_mac_hw_scan,
3021         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3022         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3023         .sta_state = iwl_mvm_mac_sta_state,
3024         .sta_notify = iwl_mvm_mac_sta_notify,
3025         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3026         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3027         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3028         .sta_rc_update = iwl_mvm_sta_rc_update,
3029         .conf_tx = iwl_mvm_mac_conf_tx,
3030         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3031         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3032         .flush = iwl_mvm_mac_flush,
3033         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3034         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3035         .set_key = iwl_mvm_mac_set_key,
3036         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3037         .remain_on_channel = iwl_mvm_roc,
3038         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3039         .add_chanctx = iwl_mvm_add_chanctx,
3040         .remove_chanctx = iwl_mvm_remove_chanctx,
3041         .change_chanctx = iwl_mvm_change_chanctx,
3042         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3043         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3044         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3045
3046         .start_ap = iwl_mvm_start_ap_ibss,
3047         .stop_ap = iwl_mvm_stop_ap_ibss,
3048         .join_ibss = iwl_mvm_start_ap_ibss,
3049         .leave_ibss = iwl_mvm_stop_ap_ibss,
3050
3051         .set_tim = iwl_mvm_set_tim,
3052
3053         .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3054
3055         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3056
3057 #ifdef CONFIG_PM_SLEEP
3058         /* look at d3.c */
3059         .suspend = iwl_mvm_suspend,
3060         .resume = iwl_mvm_resume,
3061         .set_wakeup = iwl_mvm_set_wakeup,
3062         .set_rekey_data = iwl_mvm_set_rekey_data,
3063 #if IS_ENABLED(CONFIG_IPV6)
3064         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3065 #endif
3066         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3067 #endif
3068 };