net/mac80211/main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  * Copyright (C) 2017     Intel Deutschland GmbH
   8  * Copyright (C) 2018 - 2019 Intel Corporation
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <linux/module.h>
  13 #include <linux/fips.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "debugfs.h"
  35
  36 void ieee80211_configure_filter(struct ieee80211_local *local)
  37 {
  38         u64 mc;
  39         unsigned int changed_flags;
  40         unsigned int new_flags = 0;
  41
  42         if (atomic_read(&local->iff_allmultis))
  43                 new_flags |= FIF_ALLMULTI;
  44
  45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  48
  49         if (local->fif_probe_req || local->probe_req_reg)
  50                 new_flags |= FIF_PROBE_REQ;
  51
  52         if (local->fif_fcsfail)
  53                 new_flags |= FIF_FCSFAIL;
  54
  55         if (local->fif_plcpfail)
  56                 new_flags |= FIF_PLCPFAIL;
  57
  58         if (local->fif_control)
  59                 new_flags |= FIF_CONTROL;
  60
  61         if (local->fif_other_bss)
  62                 new_flags |= FIF_OTHER_BSS;
  63
  64         if (local->fif_pspoll)
  65                 new_flags |= FIF_PSPOLL;
  66
  67         spin_lock_bh(&local->filter_lock);
  68         changed_flags = local->filter_flags ^ new_flags;
  69
  70         mc = drv_prepare_multicast(local, &local->mc_list);
  71         spin_unlock_bh(&local->filter_lock);
  72
  73         /* be a bit nasty */
  74         new_flags |= (1<<31);
  75
  76         drv_configure_filter(local, changed_flags, &new_flags, mc);
  77
  78         WARN_ON(new_flags & (1<<31));
  79
  80         local->filter_flags = new_flags & ~(1<<31);
  81 }
  82
  83 static void ieee80211_reconfig_filter(struct work_struct *work)
  84 {
  85         struct ieee80211_local *local =
  86                 container_of(work, struct ieee80211_local, reconfig_filter);
  87
  88         ieee80211_configure_filter(local);
  89 }
  90
  91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  92 {
  93         struct ieee80211_sub_if_data *sdata;
  94         struct cfg80211_chan_def chandef = {};
  95         u32 changed = 0;
  96         int power;
  97         u32 offchannel_flag;
  98
  99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 100
 101         if (local->scan_chandef.chan) {
 102                 chandef = local->scan_chandef;
 103         } else if (local->tmp_channel) {
 104                 chandef.chan = local->tmp_channel;
 105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 106                 chandef.center_freq1 = chandef.chan->center_freq;
 107         } else
 108                 chandef = local->_oper_chandef;
 109
 110         WARN(!cfg80211_chandef_valid(&chandef),
 111              "control:%d MHz width:%d center: %d/%d MHz",
 112              chandef.chan->center_freq, chandef.width,
 113              chandef.center_freq1, chandef.center_freq2);
 114
 115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 117         else
 118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 119
 120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 121
 122         if (offchannel_flag ||
 123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 124                                         &local->_oper_chandef)) {
 125                 local->hw.conf.chandef = chandef;
 126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 127         }
 128
 129         if (!conf_is_ht(&local->hw.conf)) {
 130                 /*
 131                  * mac80211.h documents that this is only valid
 132                  * when the channel is set to an HT type, and
 133                  * that otherwise STATIC is used.
 134                  */
 135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 137                 local->hw.conf.smps_mode = local->smps_mode;
 138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 139         }
 140
 141         power = ieee80211_chandef_max_power(&chandef);
 142
 143         rcu_read_lock();
 144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 146                         continue;
 147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 148                         continue;
 149                 power = min(power, sdata->vif.bss_conf.txpower);
 150         }
 151         rcu_read_unlock();
 152
 153         if (local->hw.conf.power_level != power) {
 154                 changed |= IEEE80211_CONF_CHANGE_POWER;
 155                 local->hw.conf.power_level = power;
 156         }
 157
 158         return changed;
 159 }
 160
 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 162 {
 163         int ret = 0;
 164
 165         might_sleep();
 166
 167         if (!local->use_chanctx)
 168                 changed |= ieee80211_hw_conf_chan(local);
 169         else
 170                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 171                              IEEE80211_CONF_CHANGE_POWER);
 172
 173         if (changed && local->open_count) {
 174                 ret = drv_config(local, changed);
 175                 /*
 176                  * Goal:
 177                  * HW reconfiguration should never fail, the driver has told
 178                  * us what it can support so it should live up to that promise.
 179                  *
 180                  * Current status:
 181                  * rfkill is not integrated with mac80211 and a
 182                  * configuration command can thus fail if hardware rfkill
 183                  * is enabled
 184                  *
 185                  * FIXME: integrate rfkill with mac80211 and then add this
 186                  * WARN_ON() back
 187                  *
 188                  */
 189                 /* WARN_ON(ret); */
 190         }
 191
 192         return ret;
 193 }
 194
 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 196                                       u32 changed)
 197 {
 198         struct ieee80211_local *local = sdata->local;
 199
 200         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 201                 return;
 202
 203         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 204 }
 205
 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 207 {
 208         sdata->vif.bss_conf.use_cts_prot = false;
 209         sdata->vif.bss_conf.use_short_preamble = false;
 210         sdata->vif.bss_conf.use_short_slot = false;
 211         return BSS_CHANGED_ERP_CTS_PROT |
 212                BSS_CHANGED_ERP_PREAMBLE |
 213                BSS_CHANGED_ERP_SLOT;
 214 }
 215
 216 static void ieee80211_tasklet_handler(unsigned long data)
 217 {
 218         struct ieee80211_local *local = (struct ieee80211_local *) data;
 219         struct sk_buff *skb;
 220
 221         while ((skb = skb_dequeue(&local->skb_queue)) ||
 222                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 223                 switch (skb->pkt_type) {
 224                 case IEEE80211_RX_MSG:
 225                         /* Clear skb->pkt_type in order to not confuse kernel
 226                          * netstack. */
 227                         skb->pkt_type = 0;
 228                         ieee80211_rx(&local->hw, skb);
 229                         break;
 230                 case IEEE80211_TX_STATUS_MSG:
 231                         skb->pkt_type = 0;
 232                         ieee80211_tx_status(&local->hw, skb);
 233                         break;
 234                 default:
 235                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 236                              skb->pkt_type);
 237                         dev_kfree_skb(skb);
 238                         break;
 239                 }
 240         }
 241 }
 242
 243 static void ieee80211_restart_work(struct work_struct *work)
 244 {
 245         struct ieee80211_local *local =
 246                 container_of(work, struct ieee80211_local, restart_work);
 247         struct ieee80211_sub_if_data *sdata;
 248
 249         /* wait for scan work complete */
 250         flush_workqueue(local->workqueue);
 251         flush_work(&local->sched_scan_stopped_work);
 252
 253         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 254              "%s called with hardware scan in progress\n", __func__);
 255
 256         flush_work(&local->radar_detected_work);
 257         rtnl_lock();
 258         list_for_each_entry(sdata, &local->interfaces, list) {
 259                 /*
 260                  * XXX: there may be more work for other vif types and even
 261                  * for station mode: a good thing would be to run most of
 262                  * the iface type's dependent _stop (ieee80211_mg_stop,
 263                  * ieee80211_ibss_stop) etc...
 264                  * For now, fix only the specific bug that was seen: race
 265                  * between csa_connection_drop_work and us.
 266                  */
 267                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 268                         /*
 269                          * This worker is scheduled from the iface worker that
 270                          * runs on mac80211's workqueue, so we can't be
 271                          * scheduling this worker after the cancel right here.
 272                          * The exception is ieee80211_chswitch_done.
 273                          * Then we can have a race...
 274                          */
 275                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 276                 }
 277                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 278         }
 279         ieee80211_scan_cancel(local);
 280
 281         /* make sure any new ROC will consider local->in_reconfig */
 282         flush_delayed_work(&local->roc_work);
 283         flush_work(&local->hw_roc_done);
 284
 285         /* wait for all packet processing to be done */
 286         synchronize_net();
 287
 288         ieee80211_reconfig(local);
 289         rtnl_unlock();
 290 }
 291
 292 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 293 {
 294         struct ieee80211_local *local = hw_to_local(hw);
 295
 296         trace_api_restart_hw(local);
 297
 298         wiphy_info(hw->wiphy,
 299                    "Hardware restart was requested\n");
 300
 301         /* use this reason, ieee80211_reconfig will unblock it */
 302         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 303                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 304                                         false);
 305
 306         /*
 307          * Stop all Rx during the reconfig. We don't want state changes
 308          * or driver callbacks while this is in progress.
 309          */
 310         local->in_reconfig = true;
 311         barrier();
 312
 313         queue_work(system_freezable_wq, &local->restart_work);
 314 }
 315 EXPORT_SYMBOL(ieee80211_restart_hw);
 316
 317 #ifdef CONFIG_INET
 318 static int ieee80211_ifa_changed(struct notifier_block *nb,
 319                                  unsigned long data, void *arg)
 320 {
 321         struct in_ifaddr *ifa = arg;
 322         struct ieee80211_local *local =
 323                 container_of(nb, struct ieee80211_local,
 324                              ifa_notifier);
 325         struct net_device *ndev = ifa->ifa_dev->dev;
 326         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 327         struct in_device *idev;
 328         struct ieee80211_sub_if_data *sdata;
 329         struct ieee80211_bss_conf *bss_conf;
 330         struct ieee80211_if_managed *ifmgd;
 331         int c = 0;
 332
 333         /* Make sure it's our interface that got changed */
 334         if (!wdev)
 335                 return NOTIFY_DONE;
 336
 337         if (wdev->wiphy != local->hw.wiphy)
 338                 return NOTIFY_DONE;
 339
 340         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 341         bss_conf = &sdata->vif.bss_conf;
 342
 343         /* ARP filtering is only supported in managed mode */
 344         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 345                 return NOTIFY_DONE;
 346
 347         idev = __in_dev_get_rtnl(sdata->dev);
 348         if (!idev)
 349                 return NOTIFY_DONE;
 350
 351         ifmgd = &sdata->u.mgd;
 352         sdata_lock(sdata);
 353
 354         /* Copy the addresses to the bss_conf list */
 355         ifa = rtnl_dereference(idev->ifa_list);
 356         while (ifa) {
 357                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 358                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 359                 ifa = rtnl_dereference(ifa->ifa_next);
 360                 c++;
 361         }
 362
 363         bss_conf->arp_addr_cnt = c;
 364
 365         /* Configure driver only if associated (which also implies it is up) */
 366         if (ifmgd->associated)
 367                 ieee80211_bss_info_change_notify(sdata,
 368                                                  BSS_CHANGED_ARP_FILTER);
 369
 370         sdata_unlock(sdata);
 371
 372         return NOTIFY_OK;
 373 }
 374 #endif
 375
 376 #if IS_ENABLED(CONFIG_IPV6)
 377 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 378                                   unsigned long data, void *arg)
 379 {
 380         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 381         struct inet6_dev *idev = ifa->idev;
 382         struct net_device *ndev = ifa->idev->dev;
 383         struct ieee80211_local *local =
 384                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 385         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 386         struct ieee80211_sub_if_data *sdata;
 387
 388         /* Make sure it's our interface that got changed */
 389         if (!wdev || wdev->wiphy != local->hw.wiphy)
 390                 return NOTIFY_DONE;
 391
 392         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 393
 394         /*
 395          * For now only support station mode. This is mostly because
 396          * doing AP would have to handle AP_VLAN in some way ...
 397          */
 398         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 399                 return NOTIFY_DONE;
 400
 401         drv_ipv6_addr_change(local, sdata, idev);
 402
 403         return NOTIFY_OK;
 404 }
 405 #endif
 406
 407 /* There isn't a lot of sense in it, but you can transmit anything you like */
 408 static const struct ieee80211_txrx_stypes
 409 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 410         [NL80211_IFTYPE_ADHOC] = {
 411                 .tx = 0xffff,
 412                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 413                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 414                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 415                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 416         },
 417         [NL80211_IFTYPE_STATION] = {
 418                 .tx = 0xffff,
 419                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 420                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 421         },
 422         [NL80211_IFTYPE_AP] = {
 423                 .tx = 0xffff,
 424                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 425                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 426                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 427                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 428                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 429                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 430                         BIT(IEEE80211_STYPE_ACTION >> 4),
 431         },
 432         [NL80211_IFTYPE_AP_VLAN] = {
 433                 /* copy AP */
 434                 .tx = 0xffff,
 435                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 436                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 437                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 438                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 439                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 440                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 441                         BIT(IEEE80211_STYPE_ACTION >> 4),
 442         },
 443         [NL80211_IFTYPE_P2P_CLIENT] = {
 444                 .tx = 0xffff,
 445                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 446                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 447         },
 448         [NL80211_IFTYPE_P2P_GO] = {
 449                 .tx = 0xffff,
 450                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 451                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 452                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 453                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 454                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 455                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 456                         BIT(IEEE80211_STYPE_ACTION >> 4),
 457         },
 458         [NL80211_IFTYPE_MESH_POINT] = {
 459                 .tx = 0xffff,
 460                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 461                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 462                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 463         },
 464         [NL80211_IFTYPE_P2P_DEVICE] = {
 465                 .tx = 0xffff,
 466                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 467                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 468         },
 469 };
 470
 471 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 472         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 473                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 474
 475         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 476                                 IEEE80211_HT_CAP_MAX_AMSDU |
 477                                 IEEE80211_HT_CAP_SGI_20 |
 478                                 IEEE80211_HT_CAP_SGI_40 |
 479                                 IEEE80211_HT_CAP_TX_STBC |
 480                                 IEEE80211_HT_CAP_RX_STBC |
 481                                 IEEE80211_HT_CAP_LDPC_CODING |
 482                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 483         .mcs = {
 484                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 485                              0xff, 0xff, 0xff, 0xff, 0xff, },
 486         },
 487 };
 488
 489 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 490         .vht_cap_info =
 491                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 492                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 493                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 494                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 495                             IEEE80211_VHT_CAP_TXSTBC |
 496                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 497                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 498                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 499                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 500                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 501         .supp_mcs = {
 502                 .rx_mcs_map = cpu_to_le16(~0),
 503                 .tx_mcs_map = cpu_to_le16(~0),
 504         },
 505 };
 506
 507 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 508                                            const struct ieee80211_ops *ops,
 509                                            const char *requested_name)
 510 {
 511         struct ieee80211_local *local;
 512         int priv_size, i;
 513         struct wiphy *wiphy;
 514         bool use_chanctx;
 515
 516         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 517                     !ops->add_interface || !ops->remove_interface ||
 518                     !ops->configure_filter))
 519                 return NULL;
 520
 521         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 522                 return NULL;
 523
 524         /* check all or no channel context operations exist */
 525         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 526             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 527             !!ops->unassign_vif_chanctx;
 528         if (WARN_ON(i != 0 && i != 5))
 529                 return NULL;
 530         use_chanctx = i == 5;
 531
 532         /* Ensure 32-byte alignment of our private data and hw private data.
 533          * We use the wiphy priv data for both our ieee80211_local and for
 534          * the driver's private data
 535          *
 536          * In memory it'll be like this:
 537          *
 538          * +-------------------------+
 539          * | struct wiphy           |
 540          * +-------------------------+
 541          * | struct ieee80211_local  |
 542          * +-------------------------+
 543          * | driver's private data   |
 544          * +-------------------------+
 545          *
 546          */
 547         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 548
 549         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 550
 551         if (!wiphy)
 552                 return NULL;
 553
 554         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 555
 556         wiphy->privid = mac80211_wiphy_privid;
 557
 558         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 559                         WIPHY_FLAG_4ADDR_AP |
 560                         WIPHY_FLAG_4ADDR_STATION |
 561                         WIPHY_FLAG_REPORTS_OBSS |
 562                         WIPHY_FLAG_OFFCHAN_TX;
 563
 564         if (ops->remain_on_channel)
 565                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 566
 567         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 568                            NL80211_FEATURE_SAE |
 569                            NL80211_FEATURE_HT_IBSS |
 570                            NL80211_FEATURE_VIF_TXPOWER |
 571                            NL80211_FEATURE_MAC_ON_CREATE |
 572                            NL80211_FEATURE_USERSPACE_MPM |
 573                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 574         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 575         wiphy_ext_feature_set(wiphy,
 576                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 577
 578         if (!ops->hw_scan) {
 579                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 580                                    NL80211_FEATURE_AP_SCAN;
 581                 /*
 582                  * if the driver behaves correctly using the probe request
 583                  * (template) from mac80211, then both of these should be
 584                  * supported even with hw scan - but let drivers opt in.
 585                  */
 586                 wiphy_ext_feature_set(wiphy,
 587                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 588                 wiphy_ext_feature_set(wiphy,
 589                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 590         }
 591
 592         if (!ops->set_key)
 593                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 594
 595         if (ops->wake_tx_queue)
 596                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 597
 598         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 599
 600         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 601
 602         local = wiphy_priv(wiphy);
 603
 604         if (sta_info_init(local))
 605                 goto err_free;
 606
 607         local->hw.wiphy = wiphy;
 608
 609         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 610
 611         local->ops = ops;
 612         local->use_chanctx = use_chanctx;
 613
 614         /*
 615          * We need a bit of data queued to build aggregates properly, so
 616          * instruct the TCP stack to allow more than a single ms of data
 617          * to be queued in the stack. The value is a bit-shift of 1
 618          * second, so 7 is ~8ms of queued data. Only affects local TCP
 619          * sockets.
 620          * This is the default, anyhow - drivers may need to override it
 621          * for local reasons (longer buffers, longer completion time, or
 622          * similar).
 623          */
 624         local->hw.tx_sk_pacing_shift = 7;
 625
 626         /* set up some defaults */
 627         local->hw.queues = 1;
 628         local->hw.max_rates = 1;
 629         local->hw.max_report_rates = 0;
 630         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 631         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 632         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 633         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 634         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 635         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 636                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 637                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 638         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 639                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 640         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 641         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 642         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 643         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 644         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 645         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 646
 647         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 648
 649         wiphy->extended_capabilities = local->ext_capa;
 650         wiphy->extended_capabilities_mask = local->ext_capa;
 651         wiphy->extended_capabilities_len =
 652                 ARRAY_SIZE(local->ext_capa);
 653
 654         INIT_LIST_HEAD(&local->interfaces);
 655         INIT_LIST_HEAD(&local->mon_list);
 656
 657         __hw_addr_init(&local->mc_list);
 658
 659         mutex_init(&local->iflist_mtx);
 660         mutex_init(&local->mtx);
 661
 662         mutex_init(&local->key_mtx);
 663         spin_lock_init(&local->filter_lock);
 664         spin_lock_init(&local->rx_path_lock);
 665         spin_lock_init(&local->queue_stop_reason_lock);
 666
 667         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 668                 INIT_LIST_HEAD(&local->active_txqs[i]);
 669                 spin_lock_init(&local->active_txq_lock[i]);
 670         }
 671         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 672
 673         INIT_LIST_HEAD(&local->chanctx_list);
 674         mutex_init(&local->chanctx_mtx);
 675
 676         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 677
 678         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 679
 680         INIT_WORK(&local->radar_detected_work,
 681                   ieee80211_dfs_radar_detected_work);
 682
 683         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 684         local->smps_mode = IEEE80211_SMPS_OFF;
 685
 686         INIT_WORK(&local->dynamic_ps_enable_work,
 687                   ieee80211_dynamic_ps_enable_work);
 688         INIT_WORK(&local->dynamic_ps_disable_work,
 689                   ieee80211_dynamic_ps_disable_work);
 690         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 691
 692         INIT_WORK(&local->sched_scan_stopped_work,
 693                   ieee80211_sched_scan_stopped_work);
 694
 695         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 696
 697         spin_lock_init(&local->ack_status_lock);
 698         idr_init(&local->ack_status_frames);
 699
 700         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 701                 skb_queue_head_init(&local->pending[i]);
 702                 atomic_set(&local->agg_queue_stop[i], 0);
 703         }
 704         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 705                      (unsigned long)local);
 706
 707         if (ops->wake_tx_queue)
 708                 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
 709                              (unsigned long)local);
 710
 711         tasklet_init(&local->tasklet,
 712                      ieee80211_tasklet_handler,
 713                      (unsigned long) local);
 714
 715         skb_queue_head_init(&local->skb_queue);
 716         skb_queue_head_init(&local->skb_queue_unreliable);
 717         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 718
 719         ieee80211_alloc_led_names(local);
 720
 721         ieee80211_roc_setup(local);
 722
 723         local->hw.radiotap_timestamp.units_pos = -1;
 724         local->hw.radiotap_timestamp.accuracy = -1;
 725
 726         return &local->hw;
 727  err_free:
 728         wiphy_free(wiphy);
 729         return NULL;
 730 }
 731 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 732
 733 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 734 {
 735         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 736         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 737         int n_suites = 0, r = 0, w = 0;
 738         u32 *suites;
 739         static const u32 cipher_suites[] = {
 740                 /* keep WEP first, it may be removed below */
 741                 WLAN_CIPHER_SUITE_WEP40,
 742                 WLAN_CIPHER_SUITE_WEP104,
 743                 WLAN_CIPHER_SUITE_TKIP,
 744                 WLAN_CIPHER_SUITE_CCMP,
 745                 WLAN_CIPHER_SUITE_CCMP_256,
 746                 WLAN_CIPHER_SUITE_GCMP,
 747                 WLAN_CIPHER_SUITE_GCMP_256,
 748
 749                 /* keep last -- depends on hw flags! */
 750                 WLAN_CIPHER_SUITE_AES_CMAC,
 751                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 752                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 753                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 754         };
 755
 756         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 757             local->hw.wiphy->cipher_suites) {
 758                 /* If the driver advertises, or doesn't support SW crypto,
 759                  * we only need to remove WEP if necessary.
 760                  */
 761                 if (have_wep)
 762                         return 0;
 763
 764                 /* well if it has _no_ ciphers ... fine */
 765                 if (!local->hw.wiphy->n_cipher_suites)
 766                         return 0;
 767
 768                 /* Driver provides cipher suites, but we need to exclude WEP */
 769                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 770                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 771                                  GFP_KERNEL);
 772                 if (!suites)
 773                         return -ENOMEM;
 774
 775                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 776                         u32 suite = local->hw.wiphy->cipher_suites[r];
 777
 778                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 779                             suite == WLAN_CIPHER_SUITE_WEP104)
 780                                 continue;
 781                         suites[w++] = suite;
 782                 }
 783         } else if (!local->hw.cipher_schemes) {
 784                 /* If the driver doesn't have cipher schemes, there's nothing
 785                  * else to do other than assign the (software supported and
 786                  * perhaps offloaded) cipher suites.
 787                  */
 788                 local->hw.wiphy->cipher_suites = cipher_suites;
 789                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 790
 791                 if (!have_mfp)
 792                         local->hw.wiphy->n_cipher_suites -= 4;
 793
 794                 if (!have_wep) {
 795                         local->hw.wiphy->cipher_suites += 2;
 796                         local->hw.wiphy->n_cipher_suites -= 2;
 797                 }
 798
 799                 /* not dynamically allocated, so just return */
 800                 return 0;
 801         } else {
 802                 const struct ieee80211_cipher_scheme *cs;
 803
 804                 cs = local->hw.cipher_schemes;
 805
 806                 /* Driver specifies cipher schemes only (but not cipher suites
 807                  * including the schemes)
 808                  *
 809                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 810                  * CCMP-256, GCMP, and GCMP-256
 811                  */
 812                 n_suites = local->hw.n_cipher_schemes + 5;
 813
 814                 /* check if we have WEP40 and WEP104 */
 815                 if (have_wep)
 816                         n_suites += 2;
 817
 818                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 819                  * BIP-GMAC-256
 820                  */
 821                 if (have_mfp)
 822                         n_suites += 4;
 823
 824                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
 825                 if (!suites)
 826                         return -ENOMEM;
 827
 828                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 829                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 830                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 831                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 832                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 833
 834                 if (have_wep) {
 835                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 836                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 837                 }
 838
 839                 if (have_mfp) {
 840                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 841                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 842                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 843                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 844                 }
 845
 846                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 847                         suites[w++] = cs[r].cipher;
 848                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 849                                 kfree(suites);
 850                                 return -EINVAL;
 851                         }
 852                 }
 853         }
 854
 855         local->hw.wiphy->cipher_suites = suites;
 856         local->hw.wiphy->n_cipher_suites = w;
 857         local->wiphy_ciphers_allocated = true;
 858
 859         return 0;
 860 }
 861
 862 int ieee80211_register_hw(struct ieee80211_hw *hw)
 863 {
 864         struct ieee80211_local *local = hw_to_local(hw);
 865         int result, i;
 866         enum nl80211_band band;
 867         int channels, max_bitrates;
 868         bool supp_ht, supp_vht, supp_he;
 869         netdev_features_t feature_whitelist;
 870         struct cfg80211_chan_def dflt_chandef = {};
 871
 872         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 873             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 874              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 875                 return -EINVAL;
 876
 877         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 878             (!local->ops->tdls_channel_switch ||
 879              !local->ops->tdls_cancel_channel_switch ||
 880              !local->ops->tdls_recv_channel_switch))
 881                 return -EOPNOTSUPP;
 882
 883         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 884                     !local->ops->set_frag_threshold))
 885                 return -EINVAL;
 886
 887         if (WARN_ON(local->hw.wiphy->interface_modes &
 888                         BIT(NL80211_IFTYPE_NAN) &&
 889                     (!local->ops->start_nan || !local->ops->stop_nan)))
 890                 return -EINVAL;
 891
 892 #ifdef CONFIG_PM
 893         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 894                 return -EINVAL;
 895 #endif
 896
 897         if (!local->use_chanctx) {
 898                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 899                         const struct ieee80211_iface_combination *comb;
 900
 901                         comb = &local->hw.wiphy->iface_combinations[i];
 902
 903                         if (comb->num_different_channels > 1)
 904                                 return -EINVAL;
 905                 }
 906         } else {
 907                 /*
 908                  * WDS is currently prohibited when channel contexts are used
 909                  * because there's no clear definition of which channel WDS
 910                  * type interfaces use
 911                  */
 912                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 913                         return -EINVAL;
 914
 915                 /* DFS is not supported with multi-channel combinations yet */
 916                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 917                         const struct ieee80211_iface_combination *comb;
 918
 919                         comb = &local->hw.wiphy->iface_combinations[i];
 920
 921                         if (comb->radar_detect_widths &&
 922                             comb->num_different_channels > 1)
 923                                 return -EINVAL;
 924                 }
 925         }
 926
 927         /* Only HW csum features are currently compatible with mac80211 */
 928         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 929                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 930                             NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
 931         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 932                 return -EINVAL;
 933
 934         if (hw->max_report_rates == 0)
 935                 hw->max_report_rates = hw->max_rates;
 936
 937         local->rx_chains = 1;
 938
 939         /*
 940          * generic code guarantees at least one band,
 941          * set this very early because much code assumes
 942          * that hw.conf.channel is assigned
 943          */
 944         channels = 0;
 945         max_bitrates = 0;
 946         supp_ht = false;
 947         supp_vht = false;
 948         supp_he = false;
 949         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 950                 struct ieee80211_supported_band *sband;
 951
 952                 sband = local->hw.wiphy->bands[band];
 953                 if (!sband)
 954                         continue;
 955
 956                 if (!dflt_chandef.chan) {
 957                         cfg80211_chandef_create(&dflt_chandef,
 958                                                 &sband->channels[0],
 959                                                 NL80211_CHAN_NO_HT);
 960                         /* init channel we're on */
 961                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 962                                 local->hw.conf.chandef = dflt_chandef;
 963                                 local->_oper_chandef = dflt_chandef;
 964                         }
 965                         local->monitor_chandef = dflt_chandef;
 966                 }
 967
 968                 channels += sband->n_channels;
 969
 970                 if (max_bitrates < sband->n_bitrates)
 971                         max_bitrates = sband->n_bitrates;
 972                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 973                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 974
 975                 if (!supp_he)
 976                         supp_he = !!ieee80211_get_he_sta_cap(sband);
 977
 978                 if (!sband->ht_cap.ht_supported)
 979                         continue;
 980
 981                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 982                 local->rx_chains =
 983                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 984                             local->rx_chains);
 985
 986                 /* no need to mask, SM_PS_DISABLED has all bits set */
 987                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 988                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
 989         }
 990
 991         /* if low-level driver supports AP, we also support VLAN.
 992          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
 993          * based on their support to transmit SW encrypted packets.
 994          */
 995         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
 996             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
 997                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 998                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 999         }
1000
1001         /* mac80211 always supports monitor */
1002         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1003         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1004
1005         /* mac80211 doesn't support more than one IBSS interface right now */
1006         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1007                 const struct ieee80211_iface_combination *c;
1008                 int j;
1009
1010                 c = &hw->wiphy->iface_combinations[i];
1011
1012                 for (j = 0; j < c->n_limits; j++)
1013                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1014                             c->limits[j].max > 1)
1015                                 return -EINVAL;
1016         }
1017
1018         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1019                                       sizeof(void *) * channels, GFP_KERNEL);
1020         if (!local->int_scan_req)
1021                 return -ENOMEM;
1022
1023         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1024                 if (!local->hw.wiphy->bands[band])
1025                         continue;
1026                 local->int_scan_req->rates[band] = (u32) -1;
1027         }
1028
1029 #ifndef CONFIG_MAC80211_MESH
1030         /* mesh depends on Kconfig, but drivers should set it if they want */
1031         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1032 #endif
1033
1034         /* if the underlying driver supports mesh, mac80211 will (at least)
1035          * provide routing of mesh authentication frames to userspace */
1036         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1037                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1038
1039         /* mac80211 supports control port protocol changing */
1040         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1041
1042         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1043                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1044         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1045                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1046                 if (hw->max_signal <= 0) {
1047                         result = -EINVAL;
1048                         goto fail_workqueue;
1049                 }
1050         }
1051
1052         /* Mac80211 and therefore all drivers using SW crypto only
1053          * are able to handle PTK rekeys and Extended Key ID.
1054          */
1055         if (!local->ops->set_key) {
1056                 wiphy_ext_feature_set(local->hw.wiphy,
1057                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1058                 wiphy_ext_feature_set(local->hw.wiphy,
1059                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1060         }
1061
1062         /*
1063          * Calculate scan IE length -- we need this to alloc
1064          * memory and to subtract from the driver limit. It
1065          * includes the DS Params, (extended) supported rates, and HT
1066          * information -- SSID is the driver's responsibility.
1067          */
1068         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1069                 3 /* DS Params */;
1070         if (supp_ht)
1071                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1072
1073         if (supp_vht)
1074                 local->scan_ies_len +=
1075                         2 + sizeof(struct ieee80211_vht_cap);
1076
1077         /* HE cap element is variable in size - set len to allow max size */
1078         /*
1079          * TODO: 1 is added at the end of the calculation to accommodate for
1080          *      the temporary placing of the HE capabilities IE under EXT.
1081          *      Remove it once it is placed in the final place.
1082          */
1083         if (supp_he)
1084                 local->scan_ies_len +=
1085                         2 + sizeof(struct ieee80211_he_cap_elem) +
1086                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1087                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1088
1089         if (!local->ops->hw_scan) {
1090                 /* For hw_scan, driver needs to set these up. */
1091                 local->hw.wiphy->max_scan_ssids = 4;
1092                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1093         }
1094
1095         /*
1096          * If the driver supports any scan IEs, then assume the
1097          * limit includes the IEs mac80211 will add, otherwise
1098          * leave it at zero and let the driver sort it out; we
1099          * still pass our IEs to the driver but userspace will
1100          * not be allowed to in that case.
1101          */
1102         if (local->hw.wiphy->max_scan_ie_len)
1103                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1104
1105         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1106                                          local->hw.n_cipher_schemes));
1107
1108         result = ieee80211_init_cipher_suites(local);
1109         if (result < 0)
1110                 goto fail_workqueue;
1111
1112         if (!local->ops->remain_on_channel)
1113                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1114
1115         /* mac80211 based drivers don't support internal TDLS setup */
1116         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1117                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1118
1119         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1120         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1121                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1122
1123         /* mac80211 supports multi BSSID, if the driver supports it */
1124         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1125                 local->hw.wiphy->support_mbssid = true;
1126                 if (ieee80211_hw_check(&local->hw,
1127                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1128                         local->hw.wiphy->support_only_he_mbssid = true;
1129                 else
1130                         local->ext_capa[2] |=
1131                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1132         }
1133
1134         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1135
1136         /*
1137          * We use the number of queues for feature tests (QoS, HT) internally
1138          * so restrict them appropriately.
1139          */
1140         if (hw->queues > IEEE80211_MAX_QUEUES)
1141                 hw->queues = IEEE80211_MAX_QUEUES;
1142
1143         local->workqueue =
1144                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1145         if (!local->workqueue) {
1146                 result = -ENOMEM;
1147                 goto fail_workqueue;
1148         }
1149
1150         /*
1151          * The hardware needs headroom for sending the frame,
1152          * and we need some headroom for passing the frame to monitor
1153          * interfaces, but never both at the same time.
1154          */
1155         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1156                                    IEEE80211_TX_STATUS_HEADROOM);
1157
1158         /*
1159          * if the driver doesn't specify a max listen interval we
1160          * use 5 which should be a safe default
1161          */
1162         if (local->hw.max_listen_interval == 0)
1163                 local->hw.max_listen_interval = 5;
1164
1165         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1166
1167         local->dynamic_ps_forced_timeout = -1;
1168
1169         if (!local->hw.max_nan_de_entries)
1170                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1171
1172         if (!local->hw.weight_multiplier)
1173                 local->hw.weight_multiplier = 1;
1174
1175         result = ieee80211_wep_init(local);
1176         if (result < 0)
1177                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1178                             result);
1179
1180         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1181
1182         ieee80211_led_init(local);
1183
1184         result = ieee80211_txq_setup_flows(local);
1185         if (result)
1186                 goto fail_flows;
1187
1188         rtnl_lock();
1189         result = ieee80211_init_rate_ctrl_alg(local,
1190                                               hw->rate_control_algorithm);
1191         rtnl_unlock();
1192         if (result < 0) {
1193                 wiphy_debug(local->hw.wiphy,
1194                             "Failed to initialize rate control algorithm\n");
1195                 goto fail_rate;
1196         }
1197
1198         if (local->rate_ctrl) {
1199                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1200                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1201                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1202         }
1203
1204         /*
1205          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1206          * or have it when we don't, copy the sband structure and set/clear it.
1207          * This is necessary because rate scaling algorithms could be switched
1208          * and have different support values.
1209          * Print a message so that in the common case the reallocation can be
1210          * avoided.
1211          */
1212         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1213         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1214                 struct ieee80211_supported_band *sband;
1215                 bool local_cap, ie_cap;
1216
1217                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1218
1219                 sband = local->hw.wiphy->bands[band];
1220                 if (!sband || !sband->vht_cap.vht_supported)
1221                         continue;
1222
1223                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1224                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1225
1226                 if (local_cap == ie_cap)
1227                         continue;
1228
1229                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1230                 if (!sband) {
1231                         result = -ENOMEM;
1232                         goto fail_rate;
1233                 }
1234
1235                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1236                           band);
1237
1238                 sband->vht_cap.vht_mcs.tx_highest ^=
1239                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1240
1241                 local->hw.wiphy->bands[band] = sband;
1242                 local->sband_allocated |= BIT(band);
1243         }
1244
1245         result = wiphy_register(local->hw.wiphy);
1246         if (result < 0)
1247                 goto fail_wiphy_register;
1248
1249         debugfs_hw_add(local);
1250         rate_control_add_debugfs(local);
1251
1252         rtnl_lock();
1253
1254         /* add one default STA interface if supported */
1255         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1256             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1257                 struct vif_params params = {0};
1258
1259                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1260                                           NL80211_IFTYPE_STATION, &params);
1261                 if (result)
1262                         wiphy_warn(local->hw.wiphy,
1263                                    "Failed to add default virtual iface\n");
1264         }
1265
1266         rtnl_unlock();
1267
1268 #ifdef CONFIG_INET
1269         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1270         result = register_inetaddr_notifier(&local->ifa_notifier);
1271         if (result)
1272                 goto fail_ifa;
1273 #endif
1274
1275 #if IS_ENABLED(CONFIG_IPV6)
1276         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1277         result = register_inet6addr_notifier(&local->ifa6_notifier);
1278         if (result)
1279                 goto fail_ifa6;
1280 #endif
1281
1282         return 0;
1283
1284 #if IS_ENABLED(CONFIG_IPV6)
1285  fail_ifa6:
1286 #ifdef CONFIG_INET
1287         unregister_inetaddr_notifier(&local->ifa_notifier);
1288 #endif
1289 #endif
1290 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1291  fail_ifa:
1292 #endif
1293         wiphy_unregister(local->hw.wiphy);
1294  fail_wiphy_register:
1295         rtnl_lock();
1296         rate_control_deinitialize(local);
1297         ieee80211_remove_interfaces(local);
1298         rtnl_unlock();
1299  fail_rate:
1300  fail_flows:
1301         ieee80211_led_exit(local);
1302         destroy_workqueue(local->workqueue);
1303  fail_workqueue:
1304         if (local->wiphy_ciphers_allocated)
1305                 kfree(local->hw.wiphy->cipher_suites);
1306         kfree(local->int_scan_req);
1307         return result;
1308 }
1309 EXPORT_SYMBOL(ieee80211_register_hw);
1310
1311 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1312 {
1313         struct ieee80211_local *local = hw_to_local(hw);
1314
1315         tasklet_kill(&local->tx_pending_tasklet);
1316         tasklet_kill(&local->tasklet);
1317
1318 #ifdef CONFIG_INET
1319         unregister_inetaddr_notifier(&local->ifa_notifier);
1320 #endif
1321 #if IS_ENABLED(CONFIG_IPV6)
1322         unregister_inet6addr_notifier(&local->ifa6_notifier);
1323 #endif
1324
1325         rtnl_lock();
1326
1327         /*
1328          * At this point, interface list manipulations are fine
1329          * because the driver cannot be handing us frames any
1330          * more and the tasklet is killed.
1331          */
1332         ieee80211_remove_interfaces(local);
1333
1334         rtnl_unlock();
1335
1336         cancel_delayed_work_sync(&local->roc_work);
1337         cancel_work_sync(&local->restart_work);
1338         cancel_work_sync(&local->reconfig_filter);
1339         cancel_work_sync(&local->tdls_chsw_work);
1340         flush_work(&local->sched_scan_stopped_work);
1341         flush_work(&local->radar_detected_work);
1342
1343         ieee80211_clear_tx_pending(local);
1344         rate_control_deinitialize(local);
1345
1346         if (skb_queue_len(&local->skb_queue) ||
1347             skb_queue_len(&local->skb_queue_unreliable))
1348                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1349         skb_queue_purge(&local->skb_queue);
1350         skb_queue_purge(&local->skb_queue_unreliable);
1351         skb_queue_purge(&local->skb_queue_tdls_chsw);
1352
1353         wiphy_unregister(local->hw.wiphy);
1354         destroy_workqueue(local->workqueue);
1355         ieee80211_led_exit(local);
1356         kfree(local->int_scan_req);
1357 }
1358 EXPORT_SYMBOL(ieee80211_unregister_hw);
1359
1360 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1361 {
1362         WARN_ONCE(1, "Have pending ack frames!\n");
1363         kfree_skb(p);
1364         return 0;
1365 }
1366
1367 void ieee80211_free_hw(struct ieee80211_hw *hw)
1368 {
1369         struct ieee80211_local *local = hw_to_local(hw);
1370         enum nl80211_band band;
1371
1372         mutex_destroy(&local->iflist_mtx);
1373         mutex_destroy(&local->mtx);
1374
1375         if (local->wiphy_ciphers_allocated)
1376                 kfree(local->hw.wiphy->cipher_suites);
1377
1378         idr_for_each(&local->ack_status_frames,
1379                      ieee80211_free_ack_frame, NULL);
1380         idr_destroy(&local->ack_status_frames);
1381
1382         sta_info_stop(local);
1383
1384         ieee80211_free_led_names(local);
1385
1386         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1387                 if (!(local->sband_allocated & BIT(band)))
1388                         continue;
1389                 kfree(local->hw.wiphy->bands[band]);
1390         }
1391
1392         wiphy_free(local->hw.wiphy);
1393 }
1394 EXPORT_SYMBOL(ieee80211_free_hw);
1395
1396 static int __init ieee80211_init(void)
1397 {
1398         struct sk_buff *skb;
1399         int ret;
1400
1401         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1402         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1403                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1404
1405         ret = rc80211_minstrel_init();
1406         if (ret)
1407                 return ret;
1408
1409         ret = ieee80211_iface_init();
1410         if (ret)
1411                 goto err_netdev;
1412
1413         return 0;
1414  err_netdev:
1415         rc80211_minstrel_exit();
1416
1417         return ret;
1418 }
1419
1420 static void __exit ieee80211_exit(void)
1421 {
1422         rc80211_minstrel_exit();
1423
1424         ieee80211s_stop();
1425
1426         ieee80211_iface_exit();
1427
1428         rcu_barrier();
1429 }
1430
1431
1432 subsys_initcall(ieee80211_init);
1433 module_exit(ieee80211_exit);
1434
1435 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1436 MODULE_LICENSE("GPL");