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         if (local->rx_mcast_action_reg)
  68                 new_flags |= FIF_MCAST_ACTION;
  69
  70         spin_lock_bh(&local->filter_lock);
  71         changed_flags = local->filter_flags ^ new_flags;
  72
  73         mc = drv_prepare_multicast(local, &local->mc_list);
  74         spin_unlock_bh(&local->filter_lock);
  75
  76         /* be a bit nasty */
  77         new_flags |= (1<<31);
  78
  79         drv_configure_filter(local, changed_flags, &new_flags, mc);
  80
  81         WARN_ON(new_flags & (1<<31));
  82
  83         local->filter_flags = new_flags & ~(1<<31);
  84 }
  85
  86 static void ieee80211_reconfig_filter(struct work_struct *work)
  87 {
  88         struct ieee80211_local *local =
  89                 container_of(work, struct ieee80211_local, reconfig_filter);
  90
  91         ieee80211_configure_filter(local);
  92 }
  93
  94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  95 {
  96         struct ieee80211_sub_if_data *sdata;
  97         struct cfg80211_chan_def chandef = {};
  98         u32 changed = 0;
  99         int power;
 100         u32 offchannel_flag;
 101
 102         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 103
 104         if (local->scan_chandef.chan) {
 105                 chandef = local->scan_chandef;
 106         } else if (local->tmp_channel) {
 107                 chandef.chan = local->tmp_channel;
 108                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 109                 chandef.center_freq1 = chandef.chan->center_freq;
 110                 chandef.freq1_offset = chandef.chan->freq_offset;
 111         } else
 112                 chandef = local->_oper_chandef;
 113
 114         WARN(!cfg80211_chandef_valid(&chandef),
 115              "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
 116              chandef.chan->center_freq, chandef.chan->freq_offset,
 117              chandef.width, chandef.center_freq1, chandef.freq1_offset,
 118              chandef.center_freq2);
 119
 120         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 121                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 122         else
 123                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 124
 125         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 126
 127         if (offchannel_flag ||
 128             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 129                                         &local->_oper_chandef)) {
 130                 local->hw.conf.chandef = chandef;
 131                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 132         }
 133
 134         if (!conf_is_ht(&local->hw.conf)) {
 135                 /*
 136                  * mac80211.h documents that this is only valid
 137                  * when the channel is set to an HT type, and
 138                  * that otherwise STATIC is used.
 139                  */
 140                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 141         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 142                 local->hw.conf.smps_mode = local->smps_mode;
 143                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 144         }
 145
 146         power = ieee80211_chandef_max_power(&chandef);
 147
 148         rcu_read_lock();
 149         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 150                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 151                         continue;
 152                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 153                         continue;
 154                 if (sdata->vif.bss_conf.txpower == INT_MIN)
 155                         continue;
 156                 power = min(power, sdata->vif.bss_conf.txpower);
 157         }
 158         rcu_read_unlock();
 159
 160         if (local->hw.conf.power_level != power) {
 161                 changed |= IEEE80211_CONF_CHANGE_POWER;
 162                 local->hw.conf.power_level = power;
 163         }
 164
 165         return changed;
 166 }
 167
 168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 169 {
 170         int ret = 0;
 171
 172         might_sleep();
 173
 174         if (!local->use_chanctx)
 175                 changed |= ieee80211_hw_conf_chan(local);
 176         else
 177                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 178                              IEEE80211_CONF_CHANGE_POWER);
 179
 180         if (changed && local->open_count) {
 181                 ret = drv_config(local, changed);
 182                 /*
 183                  * Goal:
 184                  * HW reconfiguration should never fail, the driver has told
 185                  * us what it can support so it should live up to that promise.
 186                  *
 187                  * Current status:
 188                  * rfkill is not integrated with mac80211 and a
 189                  * configuration command can thus fail if hardware rfkill
 190                  * is enabled
 191                  *
 192                  * FIXME: integrate rfkill with mac80211 and then add this
 193                  * WARN_ON() back
 194                  *
 195                  */
 196                 /* WARN_ON(ret); */
 197         }
 198
 199         return ret;
 200 }
 201
 202 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 203                                       u32 changed)
 204 {
 205         struct ieee80211_local *local = sdata->local;
 206
 207         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 208                 return;
 209
 210         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 211 }
 212
 213 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 214 {
 215         sdata->vif.bss_conf.use_cts_prot = false;
 216         sdata->vif.bss_conf.use_short_preamble = false;
 217         sdata->vif.bss_conf.use_short_slot = false;
 218         return BSS_CHANGED_ERP_CTS_PROT |
 219                BSS_CHANGED_ERP_PREAMBLE |
 220                BSS_CHANGED_ERP_SLOT;
 221 }
 222
 223 static void ieee80211_tasklet_handler(unsigned long data)
 224 {
 225         struct ieee80211_local *local = (struct ieee80211_local *) data;
 226         struct sk_buff *skb;
 227
 228         while ((skb = skb_dequeue(&local->skb_queue)) ||
 229                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 230                 switch (skb->pkt_type) {
 231                 case IEEE80211_RX_MSG:
 232                         /* Clear skb->pkt_type in order to not confuse kernel
 233                          * netstack. */
 234                         skb->pkt_type = 0;
 235                         ieee80211_rx(&local->hw, skb);
 236                         break;
 237                 case IEEE80211_TX_STATUS_MSG:
 238                         skb->pkt_type = 0;
 239                         ieee80211_tx_status(&local->hw, skb);
 240                         break;
 241                 default:
 242                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 243                              skb->pkt_type);
 244                         dev_kfree_skb(skb);
 245                         break;
 246                 }
 247         }
 248 }
 249
 250 static void ieee80211_restart_work(struct work_struct *work)
 251 {
 252         struct ieee80211_local *local =
 253                 container_of(work, struct ieee80211_local, restart_work);
 254         struct ieee80211_sub_if_data *sdata;
 255
 256         /* wait for scan work complete */
 257         flush_workqueue(local->workqueue);
 258         flush_work(&local->sched_scan_stopped_work);
 259
 260         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 261              "%s called with hardware scan in progress\n", __func__);
 262
 263         flush_work(&local->radar_detected_work);
 264         rtnl_lock();
 265         list_for_each_entry(sdata, &local->interfaces, list) {
 266                 /*
 267                  * XXX: there may be more work for other vif types and even
 268                  * for station mode: a good thing would be to run most of
 269                  * the iface type's dependent _stop (ieee80211_mg_stop,
 270                  * ieee80211_ibss_stop) etc...
 271                  * For now, fix only the specific bug that was seen: race
 272                  * between csa_connection_drop_work and us.
 273                  */
 274                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 275                         /*
 276                          * This worker is scheduled from the iface worker that
 277                          * runs on mac80211's workqueue, so we can't be
 278                          * scheduling this worker after the cancel right here.
 279                          * The exception is ieee80211_chswitch_done.
 280                          * Then we can have a race...
 281                          */
 282                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 283                 }
 284                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 285         }
 286         ieee80211_scan_cancel(local);
 287
 288         /* make sure any new ROC will consider local->in_reconfig */
 289         flush_delayed_work(&local->roc_work);
 290         flush_work(&local->hw_roc_done);
 291
 292         /* wait for all packet processing to be done */
 293         synchronize_net();
 294
 295         ieee80211_reconfig(local);
 296         rtnl_unlock();
 297 }
 298
 299 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 300 {
 301         struct ieee80211_local *local = hw_to_local(hw);
 302
 303         trace_api_restart_hw(local);
 304
 305         wiphy_info(hw->wiphy,
 306                    "Hardware restart was requested\n");
 307
 308         /* use this reason, ieee80211_reconfig will unblock it */
 309         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 310                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 311                                         false);
 312
 313         /*
 314          * Stop all Rx during the reconfig. We don't want state changes
 315          * or driver callbacks while this is in progress.
 316          */
 317         local->in_reconfig = true;
 318         barrier();
 319
 320         queue_work(system_freezable_wq, &local->restart_work);
 321 }
 322 EXPORT_SYMBOL(ieee80211_restart_hw);
 323
 324 #ifdef CONFIG_INET
 325 static int ieee80211_ifa_changed(struct notifier_block *nb,
 326                                  unsigned long data, void *arg)
 327 {
 328         struct in_ifaddr *ifa = arg;
 329         struct ieee80211_local *local =
 330                 container_of(nb, struct ieee80211_local,
 331                              ifa_notifier);
 332         struct net_device *ndev = ifa->ifa_dev->dev;
 333         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 334         struct in_device *idev;
 335         struct ieee80211_sub_if_data *sdata;
 336         struct ieee80211_bss_conf *bss_conf;
 337         struct ieee80211_if_managed *ifmgd;
 338         int c = 0;
 339
 340         /* Make sure it's our interface that got changed */
 341         if (!wdev)
 342                 return NOTIFY_DONE;
 343
 344         if (wdev->wiphy != local->hw.wiphy)
 345                 return NOTIFY_DONE;
 346
 347         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 348         bss_conf = &sdata->vif.bss_conf;
 349
 350         /* ARP filtering is only supported in managed mode */
 351         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 352                 return NOTIFY_DONE;
 353
 354         idev = __in_dev_get_rtnl(sdata->dev);
 355         if (!idev)
 356                 return NOTIFY_DONE;
 357
 358         ifmgd = &sdata->u.mgd;
 359         sdata_lock(sdata);
 360
 361         /* Copy the addresses to the bss_conf list */
 362         ifa = rtnl_dereference(idev->ifa_list);
 363         while (ifa) {
 364                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 365                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 366                 ifa = rtnl_dereference(ifa->ifa_next);
 367                 c++;
 368         }
 369
 370         bss_conf->arp_addr_cnt = c;
 371
 372         /* Configure driver only if associated (which also implies it is up) */
 373         if (ifmgd->associated)
 374                 ieee80211_bss_info_change_notify(sdata,
 375                                                  BSS_CHANGED_ARP_FILTER);
 376
 377         sdata_unlock(sdata);
 378
 379         return NOTIFY_OK;
 380 }
 381 #endif
 382
 383 #if IS_ENABLED(CONFIG_IPV6)
 384 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 385                                   unsigned long data, void *arg)
 386 {
 387         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 388         struct inet6_dev *idev = ifa->idev;
 389         struct net_device *ndev = ifa->idev->dev;
 390         struct ieee80211_local *local =
 391                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 392         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 393         struct ieee80211_sub_if_data *sdata;
 394
 395         /* Make sure it's our interface that got changed */
 396         if (!wdev || wdev->wiphy != local->hw.wiphy)
 397                 return NOTIFY_DONE;
 398
 399         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 400
 401         /*
 402          * For now only support station mode. This is mostly because
 403          * doing AP would have to handle AP_VLAN in some way ...
 404          */
 405         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 406                 return NOTIFY_DONE;
 407
 408         drv_ipv6_addr_change(local, sdata, idev);
 409
 410         return NOTIFY_OK;
 411 }
 412 #endif
 413
 414 /* There isn't a lot of sense in it, but you can transmit anything you like */
 415 static const struct ieee80211_txrx_stypes
 416 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 417         [NL80211_IFTYPE_ADHOC] = {
 418                 .tx = 0xffff,
 419                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 420                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 421                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 422                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 423         },
 424         [NL80211_IFTYPE_STATION] = {
 425                 .tx = 0xffff,
 426                 /*
 427                  * To support Pre Association Security Negotiation (PASN) while
 428                  * already associated to one AP, allow user space to register to
 429                  * Rx authentication frames, so that the user space logic would
 430                  * be able to receive/handle authentication frames from a
 431                  * different AP as part of PASN.
 432                  * It is expected that user space would intelligently register
 433                  * for Rx authentication frames, i.e., only when PASN is used
 434                  * and configure a match filter only for PASN authentication
 435                  * algorithm, as otherwise the MLME functionality of mac80211
 436                  * would be broken.
 437                  */
 438                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 439                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 440                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 441         },
 442         [NL80211_IFTYPE_AP] = {
 443                 .tx = 0xffff,
 444                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 445                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 446                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 447                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 448                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 449                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 450                         BIT(IEEE80211_STYPE_ACTION >> 4),
 451         },
 452         [NL80211_IFTYPE_AP_VLAN] = {
 453                 /* copy AP */
 454                 .tx = 0xffff,
 455                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 456                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 457                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 458                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 459                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 460                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 461                         BIT(IEEE80211_STYPE_ACTION >> 4),
 462         },
 463         [NL80211_IFTYPE_P2P_CLIENT] = {
 464                 .tx = 0xffff,
 465                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 466                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 467         },
 468         [NL80211_IFTYPE_P2P_GO] = {
 469                 .tx = 0xffff,
 470                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 471                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 472                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 473                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 474                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 475                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 476                         BIT(IEEE80211_STYPE_ACTION >> 4),
 477         },
 478         [NL80211_IFTYPE_MESH_POINT] = {
 479                 .tx = 0xffff,
 480                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 481                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 482                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 483         },
 484         [NL80211_IFTYPE_P2P_DEVICE] = {
 485                 .tx = 0xffff,
 486                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 487                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 488         },
 489 };
 490
 491 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 492         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 493                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 494
 495         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 496                                 IEEE80211_HT_CAP_MAX_AMSDU |
 497                                 IEEE80211_HT_CAP_SGI_20 |
 498                                 IEEE80211_HT_CAP_SGI_40 |
 499                                 IEEE80211_HT_CAP_TX_STBC |
 500                                 IEEE80211_HT_CAP_RX_STBC |
 501                                 IEEE80211_HT_CAP_LDPC_CODING |
 502                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 503         .mcs = {
 504                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 505                              0xff, 0xff, 0xff, 0xff, 0xff, },
 506         },
 507 };
 508
 509 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 510         .vht_cap_info =
 511                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 512                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 513                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 514                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 515                             IEEE80211_VHT_CAP_TXSTBC |
 516                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 517                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 518                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 519                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 520                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 521         .supp_mcs = {
 522                 .rx_mcs_map = cpu_to_le16(~0),
 523                 .tx_mcs_map = cpu_to_le16(~0),
 524         },
 525 };
 526
 527 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 528                                            const struct ieee80211_ops *ops,
 529                                            const char *requested_name)
 530 {
 531         struct ieee80211_local *local;
 532         int priv_size, i;
 533         struct wiphy *wiphy;
 534         bool use_chanctx;
 535
 536         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 537                     !ops->add_interface || !ops->remove_interface ||
 538                     !ops->configure_filter))
 539                 return NULL;
 540
 541         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 542                 return NULL;
 543
 544         /* check all or no channel context operations exist */
 545         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 546             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 547             !!ops->unassign_vif_chanctx;
 548         if (WARN_ON(i != 0 && i != 5))
 549                 return NULL;
 550         use_chanctx = i == 5;
 551
 552         /* Ensure 32-byte alignment of our private data and hw private data.
 553          * We use the wiphy priv data for both our ieee80211_local and for
 554          * the driver's private data
 555          *
 556          * In memory it'll be like this:
 557          *
 558          * +-------------------------+
 559          * | struct wiphy           |
 560          * +-------------------------+
 561          * | struct ieee80211_local  |
 562          * +-------------------------+
 563          * | driver's private data   |
 564          * +-------------------------+
 565          *
 566          */
 567         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 568
 569         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 570
 571         if (!wiphy)
 572                 return NULL;
 573
 574         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 575
 576         wiphy->privid = mac80211_wiphy_privid;
 577
 578         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 579                         WIPHY_FLAG_4ADDR_AP |
 580                         WIPHY_FLAG_4ADDR_STATION |
 581                         WIPHY_FLAG_REPORTS_OBSS |
 582                         WIPHY_FLAG_OFFCHAN_TX;
 583
 584         if (!use_chanctx || ops->remain_on_channel)
 585                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 586
 587         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 588                            NL80211_FEATURE_SAE |
 589                            NL80211_FEATURE_HT_IBSS |
 590                            NL80211_FEATURE_VIF_TXPOWER |
 591                            NL80211_FEATURE_MAC_ON_CREATE |
 592                            NL80211_FEATURE_USERSPACE_MPM |
 593                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 594         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 595         wiphy_ext_feature_set(wiphy,
 596                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 597         wiphy_ext_feature_set(wiphy,
 598                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 599         wiphy_ext_feature_set(wiphy,
 600                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 601         wiphy_ext_feature_set(wiphy,
 602                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 603
 604         if (!ops->hw_scan) {
 605                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 606                                    NL80211_FEATURE_AP_SCAN;
 607                 /*
 608                  * if the driver behaves correctly using the probe request
 609                  * (template) from mac80211, then both of these should be
 610                  * supported even with hw scan - but let drivers opt in.
 611                  */
 612                 wiphy_ext_feature_set(wiphy,
 613                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 614                 wiphy_ext_feature_set(wiphy,
 615                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 616         }
 617
 618         if (!ops->set_key)
 619                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 620
 621         if (ops->wake_tx_queue)
 622                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 623
 624         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 625
 626         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 627
 628         local = wiphy_priv(wiphy);
 629
 630         if (sta_info_init(local))
 631                 goto err_free;
 632
 633         local->hw.wiphy = wiphy;
 634
 635         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 636
 637         local->ops = ops;
 638         local->use_chanctx = use_chanctx;
 639
 640         /*
 641          * We need a bit of data queued to build aggregates properly, so
 642          * instruct the TCP stack to allow more than a single ms of data
 643          * to be queued in the stack. The value is a bit-shift of 1
 644          * second, so 7 is ~8ms of queued data. Only affects local TCP
 645          * sockets.
 646          * This is the default, anyhow - drivers may need to override it
 647          * for local reasons (longer buffers, longer completion time, or
 648          * similar).
 649          */
 650         local->hw.tx_sk_pacing_shift = 7;
 651
 652         /* set up some defaults */
 653         local->hw.queues = 1;
 654         local->hw.max_rates = 1;
 655         local->hw.max_report_rates = 0;
 656         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 657         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 658         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 659         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 660         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 661         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 662                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 663                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 664         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 665                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 666         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 667         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 668         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 669         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 670         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 671         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 672
 673         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 674
 675         wiphy->extended_capabilities = local->ext_capa;
 676         wiphy->extended_capabilities_mask = local->ext_capa;
 677         wiphy->extended_capabilities_len =
 678                 ARRAY_SIZE(local->ext_capa);
 679
 680         INIT_LIST_HEAD(&local->interfaces);
 681         INIT_LIST_HEAD(&local->mon_list);
 682
 683         __hw_addr_init(&local->mc_list);
 684
 685         mutex_init(&local->iflist_mtx);
 686         mutex_init(&local->mtx);
 687
 688         mutex_init(&local->key_mtx);
 689         spin_lock_init(&local->filter_lock);
 690         spin_lock_init(&local->rx_path_lock);
 691         spin_lock_init(&local->queue_stop_reason_lock);
 692
 693         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 694                 INIT_LIST_HEAD(&local->active_txqs[i]);
 695                 spin_lock_init(&local->active_txq_lock[i]);
 696                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 697                 local->aql_txq_limit_high[i] =
 698                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 699         }
 700
 701         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 702         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 703         atomic_set(&local->aql_total_pending_airtime, 0);
 704
 705         INIT_LIST_HEAD(&local->chanctx_list);
 706         mutex_init(&local->chanctx_mtx);
 707
 708         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 709
 710         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 711
 712         INIT_WORK(&local->radar_detected_work,
 713                   ieee80211_dfs_radar_detected_work);
 714
 715         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 716         local->smps_mode = IEEE80211_SMPS_OFF;
 717
 718         INIT_WORK(&local->dynamic_ps_enable_work,
 719                   ieee80211_dynamic_ps_enable_work);
 720         INIT_WORK(&local->dynamic_ps_disable_work,
 721                   ieee80211_dynamic_ps_disable_work);
 722         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 723
 724         INIT_WORK(&local->sched_scan_stopped_work,
 725                   ieee80211_sched_scan_stopped_work);
 726
 727         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 728
 729         spin_lock_init(&local->ack_status_lock);
 730         idr_init(&local->ack_status_frames);
 731
 732         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 733                 skb_queue_head_init(&local->pending[i]);
 734                 atomic_set(&local->agg_queue_stop[i], 0);
 735         }
 736         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 737                      (unsigned long)local);
 738
 739         if (ops->wake_tx_queue)
 740                 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
 741                              (unsigned long)local);
 742
 743         tasklet_init(&local->tasklet,
 744                      ieee80211_tasklet_handler,
 745                      (unsigned long) local);
 746
 747         skb_queue_head_init(&local->skb_queue);
 748         skb_queue_head_init(&local->skb_queue_unreliable);
 749         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 750
 751         ieee80211_alloc_led_names(local);
 752
 753         ieee80211_roc_setup(local);
 754
 755         local->hw.radiotap_timestamp.units_pos = -1;
 756         local->hw.radiotap_timestamp.accuracy = -1;
 757
 758         return &local->hw;
 759  err_free:
 760         wiphy_free(wiphy);
 761         return NULL;
 762 }
 763 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 764
 765 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 766 {
 767         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 768         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 769         int n_suites = 0, r = 0, w = 0;
 770         u32 *suites;
 771         static const u32 cipher_suites[] = {
 772                 /* keep WEP first, it may be removed below */
 773                 WLAN_CIPHER_SUITE_WEP40,
 774                 WLAN_CIPHER_SUITE_WEP104,
 775                 WLAN_CIPHER_SUITE_TKIP,
 776                 WLAN_CIPHER_SUITE_CCMP,
 777                 WLAN_CIPHER_SUITE_CCMP_256,
 778                 WLAN_CIPHER_SUITE_GCMP,
 779                 WLAN_CIPHER_SUITE_GCMP_256,
 780
 781                 /* keep last -- depends on hw flags! */
 782                 WLAN_CIPHER_SUITE_AES_CMAC,
 783                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 784                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 785                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 786         };
 787
 788         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 789             local->hw.wiphy->cipher_suites) {
 790                 /* If the driver advertises, or doesn't support SW crypto,
 791                  * we only need to remove WEP if necessary.
 792                  */
 793                 if (have_wep)
 794                         return 0;
 795
 796                 /* well if it has _no_ ciphers ... fine */
 797                 if (!local->hw.wiphy->n_cipher_suites)
 798                         return 0;
 799
 800                 /* Driver provides cipher suites, but we need to exclude WEP */
 801                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 802                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 803                                  GFP_KERNEL);
 804                 if (!suites)
 805                         return -ENOMEM;
 806
 807                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 808                         u32 suite = local->hw.wiphy->cipher_suites[r];
 809
 810                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 811                             suite == WLAN_CIPHER_SUITE_WEP104)
 812                                 continue;
 813                         suites[w++] = suite;
 814                 }
 815         } else if (!local->hw.cipher_schemes) {
 816                 /* If the driver doesn't have cipher schemes, there's nothing
 817                  * else to do other than assign the (software supported and
 818                  * perhaps offloaded) cipher suites.
 819                  */
 820                 local->hw.wiphy->cipher_suites = cipher_suites;
 821                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 822
 823                 if (!have_mfp)
 824                         local->hw.wiphy->n_cipher_suites -= 4;
 825
 826                 if (!have_wep) {
 827                         local->hw.wiphy->cipher_suites += 2;
 828                         local->hw.wiphy->n_cipher_suites -= 2;
 829                 }
 830
 831                 /* not dynamically allocated, so just return */
 832                 return 0;
 833         } else {
 834                 const struct ieee80211_cipher_scheme *cs;
 835
 836                 cs = local->hw.cipher_schemes;
 837
 838                 /* Driver specifies cipher schemes only (but not cipher suites
 839                  * including the schemes)
 840                  *
 841                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 842                  * CCMP-256, GCMP, and GCMP-256
 843                  */
 844                 n_suites = local->hw.n_cipher_schemes + 5;
 845
 846                 /* check if we have WEP40 and WEP104 */
 847                 if (have_wep)
 848                         n_suites += 2;
 849
 850                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 851                  * BIP-GMAC-256
 852                  */
 853                 if (have_mfp)
 854                         n_suites += 4;
 855
 856                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
 857                 if (!suites)
 858                         return -ENOMEM;
 859
 860                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 861                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 862                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 863                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 864                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 865
 866                 if (have_wep) {
 867                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 868                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 869                 }
 870
 871                 if (have_mfp) {
 872                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 873                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 874                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 875                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 876                 }
 877
 878                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 879                         suites[w++] = cs[r].cipher;
 880                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 881                                 kfree(suites);
 882                                 return -EINVAL;
 883                         }
 884                 }
 885         }
 886
 887         local->hw.wiphy->cipher_suites = suites;
 888         local->hw.wiphy->n_cipher_suites = w;
 889         local->wiphy_ciphers_allocated = true;
 890
 891         return 0;
 892 }
 893
 894 int ieee80211_register_hw(struct ieee80211_hw *hw)
 895 {
 896         struct ieee80211_local *local = hw_to_local(hw);
 897         int result, i;
 898         enum nl80211_band band;
 899         int channels, max_bitrates;
 900         bool supp_ht, supp_vht, supp_he;
 901         struct cfg80211_chan_def dflt_chandef = {};
 902
 903         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 904             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 905              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 906                 return -EINVAL;
 907
 908         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 909             (!local->ops->tdls_channel_switch ||
 910              !local->ops->tdls_cancel_channel_switch ||
 911              !local->ops->tdls_recv_channel_switch))
 912                 return -EOPNOTSUPP;
 913
 914         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 915                     !local->ops->set_frag_threshold))
 916                 return -EINVAL;
 917
 918         if (WARN_ON(local->hw.wiphy->interface_modes &
 919                         BIT(NL80211_IFTYPE_NAN) &&
 920                     (!local->ops->start_nan || !local->ops->stop_nan)))
 921                 return -EINVAL;
 922
 923 #ifdef CONFIG_PM
 924         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 925                 return -EINVAL;
 926 #endif
 927
 928         if (!local->use_chanctx) {
 929                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 930                         const struct ieee80211_iface_combination *comb;
 931
 932                         comb = &local->hw.wiphy->iface_combinations[i];
 933
 934                         if (comb->num_different_channels > 1)
 935                                 return -EINVAL;
 936                 }
 937         } else {
 938                 /*
 939                  * WDS is currently prohibited when channel contexts are used
 940                  * because there's no clear definition of which channel WDS
 941                  * type interfaces use
 942                  */
 943                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 944                         return -EINVAL;
 945
 946                 /* DFS is not supported with multi-channel combinations yet */
 947                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 948                         const struct ieee80211_iface_combination *comb;
 949
 950                         comb = &local->hw.wiphy->iface_combinations[i];
 951
 952                         if (comb->radar_detect_widths &&
 953                             comb->num_different_channels > 1)
 954                                 return -EINVAL;
 955                 }
 956         }
 957
 958         /* Only HW csum features are currently compatible with mac80211 */
 959         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
 960                 return -EINVAL;
 961
 962         if (hw->max_report_rates == 0)
 963                 hw->max_report_rates = hw->max_rates;
 964
 965         local->rx_chains = 1;
 966
 967         /*
 968          * generic code guarantees at least one band,
 969          * set this very early because much code assumes
 970          * that hw.conf.channel is assigned
 971          */
 972         channels = 0;
 973         max_bitrates = 0;
 974         supp_ht = false;
 975         supp_vht = false;
 976         supp_he = false;
 977         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 978                 struct ieee80211_supported_band *sband;
 979
 980                 sband = local->hw.wiphy->bands[band];
 981                 if (!sband)
 982                         continue;
 983
 984                 if (!dflt_chandef.chan) {
 985                         cfg80211_chandef_create(&dflt_chandef,
 986                                                 &sband->channels[0],
 987                                                 NL80211_CHAN_NO_HT);
 988                         /* init channel we're on */
 989                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 990                                 local->hw.conf.chandef = dflt_chandef;
 991                                 local->_oper_chandef = dflt_chandef;
 992                         }
 993                         local->monitor_chandef = dflt_chandef;
 994                 }
 995
 996                 channels += sband->n_channels;
 997
 998                 if (max_bitrates < sband->n_bitrates)
 999                         max_bitrates = sband->n_bitrates;
1000                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1001                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1002
1003                 if (!supp_he)
1004                         supp_he = !!ieee80211_get_he_sta_cap(sband);
1005
1006                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1007                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1008                             (supp_ht || supp_vht || supp_he)))
1009                         return -EINVAL;
1010
1011                 if (!sband->ht_cap.ht_supported)
1012                         continue;
1013
1014                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1015                 local->rx_chains =
1016                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1017                             local->rx_chains);
1018
1019                 /* no need to mask, SM_PS_DISABLED has all bits set */
1020                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1021                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1022         }
1023
1024         /* if low-level driver supports AP, we also support VLAN.
1025          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1026          * based on their support to transmit SW encrypted packets.
1027          */
1028         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1029             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1030                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1031                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1032         }
1033
1034         /* mac80211 always supports monitor */
1035         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1036         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1037
1038         /* mac80211 doesn't support more than one IBSS interface right now */
1039         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1040                 const struct ieee80211_iface_combination *c;
1041                 int j;
1042
1043                 c = &hw->wiphy->iface_combinations[i];
1044
1045                 for (j = 0; j < c->n_limits; j++)
1046                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1047                             c->limits[j].max > 1)
1048                                 return -EINVAL;
1049         }
1050
1051         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1052                                       sizeof(void *) * channels, GFP_KERNEL);
1053         if (!local->int_scan_req)
1054                 return -ENOMEM;
1055
1056         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1057                 if (!local->hw.wiphy->bands[band])
1058                         continue;
1059                 local->int_scan_req->rates[band] = (u32) -1;
1060         }
1061
1062 #ifndef CONFIG_MAC80211_MESH
1063         /* mesh depends on Kconfig, but drivers should set it if they want */
1064         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1065 #endif
1066
1067         /* if the underlying driver supports mesh, mac80211 will (at least)
1068          * provide routing of mesh authentication frames to userspace */
1069         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1070                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1071
1072         /* mac80211 supports control port protocol changing */
1073         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1074
1075         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1076                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1077         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1078                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1079                 if (hw->max_signal <= 0) {
1080                         result = -EINVAL;
1081                         goto fail_workqueue;
1082                 }
1083         }
1084
1085         /* Mac80211 and therefore all drivers using SW crypto only
1086          * are able to handle PTK rekeys and Extended Key ID.
1087          */
1088         if (!local->ops->set_key) {
1089                 wiphy_ext_feature_set(local->hw.wiphy,
1090                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1091                 wiphy_ext_feature_set(local->hw.wiphy,
1092                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1093         }
1094
1095         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1096                 wiphy_ext_feature_set(local->hw.wiphy,
1097                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1098
1099         /*
1100          * Calculate scan IE length -- we need this to alloc
1101          * memory and to subtract from the driver limit. It
1102          * includes the DS Params, (extended) supported rates, and HT
1103          * information -- SSID is the driver's responsibility.
1104          */
1105         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1106                 3 /* DS Params */;
1107         if (supp_ht)
1108                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1109
1110         if (supp_vht)
1111                 local->scan_ies_len +=
1112                         2 + sizeof(struct ieee80211_vht_cap);
1113
1114         /* HE cap element is variable in size - set len to allow max size */
1115         /*
1116          * TODO: 1 is added at the end of the calculation to accommodate for
1117          *      the temporary placing of the HE capabilities IE under EXT.
1118          *      Remove it once it is placed in the final place.
1119          */
1120         if (supp_he)
1121                 local->scan_ies_len +=
1122                         2 + sizeof(struct ieee80211_he_cap_elem) +
1123                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1124                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1125
1126         if (!local->ops->hw_scan) {
1127                 /* For hw_scan, driver needs to set these up. */
1128                 local->hw.wiphy->max_scan_ssids = 4;
1129                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1130         }
1131
1132         /*
1133          * If the driver supports any scan IEs, then assume the
1134          * limit includes the IEs mac80211 will add, otherwise
1135          * leave it at zero and let the driver sort it out; we
1136          * still pass our IEs to the driver but userspace will
1137          * not be allowed to in that case.
1138          */
1139         if (local->hw.wiphy->max_scan_ie_len)
1140                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1141
1142         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1143                                          local->hw.n_cipher_schemes));
1144
1145         result = ieee80211_init_cipher_suites(local);
1146         if (result < 0)
1147                 goto fail_workqueue;
1148
1149         if (!local->ops->remain_on_channel)
1150                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1151
1152         /* mac80211 based drivers don't support internal TDLS setup */
1153         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1154                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1155
1156         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1157         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1158                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1159
1160         /* mac80211 supports multi BSSID, if the driver supports it */
1161         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1162                 local->hw.wiphy->support_mbssid = true;
1163                 if (ieee80211_hw_check(&local->hw,
1164                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1165                         local->hw.wiphy->support_only_he_mbssid = true;
1166                 else
1167                         local->ext_capa[2] |=
1168                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1169         }
1170
1171         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1172
1173         /*
1174          * We use the number of queues for feature tests (QoS, HT) internally
1175          * so restrict them appropriately.
1176          */
1177         if (hw->queues > IEEE80211_MAX_QUEUES)
1178                 hw->queues = IEEE80211_MAX_QUEUES;
1179
1180         local->workqueue =
1181                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1182         if (!local->workqueue) {
1183                 result = -ENOMEM;
1184                 goto fail_workqueue;
1185         }
1186
1187         /*
1188          * The hardware needs headroom for sending the frame,
1189          * and we need some headroom for passing the frame to monitor
1190          * interfaces, but never both at the same time.
1191          */
1192         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1193                                    IEEE80211_TX_STATUS_HEADROOM);
1194
1195         /*
1196          * if the driver doesn't specify a max listen interval we
1197          * use 5 which should be a safe default
1198          */
1199         if (local->hw.max_listen_interval == 0)
1200                 local->hw.max_listen_interval = 5;
1201
1202         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1203
1204         local->dynamic_ps_forced_timeout = -1;
1205
1206         if (!local->hw.max_nan_de_entries)
1207                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1208
1209         if (!local->hw.weight_multiplier)
1210                 local->hw.weight_multiplier = 1;
1211
1212         ieee80211_wep_init(local);
1213
1214         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1215
1216         ieee80211_led_init(local);
1217
1218         result = ieee80211_txq_setup_flows(local);
1219         if (result)
1220                 goto fail_flows;
1221
1222         rtnl_lock();
1223         result = ieee80211_init_rate_ctrl_alg(local,
1224                                               hw->rate_control_algorithm);
1225         rtnl_unlock();
1226         if (result < 0) {
1227                 wiphy_debug(local->hw.wiphy,
1228                             "Failed to initialize rate control algorithm\n");
1229                 goto fail_rate;
1230         }
1231
1232         if (local->rate_ctrl) {
1233                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1234                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1235                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1236         }
1237
1238         /*
1239          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1240          * or have it when we don't, copy the sband structure and set/clear it.
1241          * This is necessary because rate scaling algorithms could be switched
1242          * and have different support values.
1243          * Print a message so that in the common case the reallocation can be
1244          * avoided.
1245          */
1246         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1247         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1248                 struct ieee80211_supported_band *sband;
1249                 bool local_cap, ie_cap;
1250
1251                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1252
1253                 sband = local->hw.wiphy->bands[band];
1254                 if (!sband || !sband->vht_cap.vht_supported)
1255                         continue;
1256
1257                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1258                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1259
1260                 if (local_cap == ie_cap)
1261                         continue;
1262
1263                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1264                 if (!sband) {
1265                         result = -ENOMEM;
1266                         goto fail_rate;
1267                 }
1268
1269                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1270                           band);
1271
1272                 sband->vht_cap.vht_mcs.tx_highest ^=
1273                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1274
1275                 local->hw.wiphy->bands[band] = sband;
1276                 local->sband_allocated |= BIT(band);
1277         }
1278
1279         result = wiphy_register(local->hw.wiphy);
1280         if (result < 0)
1281                 goto fail_wiphy_register;
1282
1283         debugfs_hw_add(local);
1284         rate_control_add_debugfs(local);
1285
1286         rtnl_lock();
1287
1288         /* add one default STA interface if supported */
1289         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1290             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1291                 struct vif_params params = {0};
1292
1293                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1294                                           NL80211_IFTYPE_STATION, &params);
1295                 if (result)
1296                         wiphy_warn(local->hw.wiphy,
1297                                    "Failed to add default virtual iface\n");
1298         }
1299
1300         rtnl_unlock();
1301
1302 #ifdef CONFIG_INET
1303         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1304         result = register_inetaddr_notifier(&local->ifa_notifier);
1305         if (result)
1306                 goto fail_ifa;
1307 #endif
1308
1309 #if IS_ENABLED(CONFIG_IPV6)
1310         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1311         result = register_inet6addr_notifier(&local->ifa6_notifier);
1312         if (result)
1313                 goto fail_ifa6;
1314 #endif
1315
1316         return 0;
1317
1318 #if IS_ENABLED(CONFIG_IPV6)
1319  fail_ifa6:
1320 #ifdef CONFIG_INET
1321         unregister_inetaddr_notifier(&local->ifa_notifier);
1322 #endif
1323 #endif
1324 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1325  fail_ifa:
1326 #endif
1327         wiphy_unregister(local->hw.wiphy);
1328  fail_wiphy_register:
1329         rtnl_lock();
1330         rate_control_deinitialize(local);
1331         ieee80211_remove_interfaces(local);
1332         rtnl_unlock();
1333  fail_rate:
1334  fail_flows:
1335         ieee80211_led_exit(local);
1336         destroy_workqueue(local->workqueue);
1337  fail_workqueue:
1338         if (local->wiphy_ciphers_allocated)
1339                 kfree(local->hw.wiphy->cipher_suites);
1340         kfree(local->int_scan_req);
1341         return result;
1342 }
1343 EXPORT_SYMBOL(ieee80211_register_hw);
1344
1345 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1346 {
1347         struct ieee80211_local *local = hw_to_local(hw);
1348
1349         tasklet_kill(&local->tx_pending_tasklet);
1350         tasklet_kill(&local->tasklet);
1351
1352 #ifdef CONFIG_INET
1353         unregister_inetaddr_notifier(&local->ifa_notifier);
1354 #endif
1355 #if IS_ENABLED(CONFIG_IPV6)
1356         unregister_inet6addr_notifier(&local->ifa6_notifier);
1357 #endif
1358
1359         rtnl_lock();
1360
1361         /*
1362          * At this point, interface list manipulations are fine
1363          * because the driver cannot be handing us frames any
1364          * more and the tasklet is killed.
1365          */
1366         ieee80211_remove_interfaces(local);
1367
1368         rtnl_unlock();
1369
1370         cancel_delayed_work_sync(&local->roc_work);
1371         cancel_work_sync(&local->restart_work);
1372         cancel_work_sync(&local->reconfig_filter);
1373         cancel_work_sync(&local->tdls_chsw_work);
1374         flush_work(&local->sched_scan_stopped_work);
1375         flush_work(&local->radar_detected_work);
1376
1377         ieee80211_clear_tx_pending(local);
1378         rate_control_deinitialize(local);
1379
1380         if (skb_queue_len(&local->skb_queue) ||
1381             skb_queue_len(&local->skb_queue_unreliable))
1382                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1383         skb_queue_purge(&local->skb_queue);
1384         skb_queue_purge(&local->skb_queue_unreliable);
1385         skb_queue_purge(&local->skb_queue_tdls_chsw);
1386
1387         wiphy_unregister(local->hw.wiphy);
1388         destroy_workqueue(local->workqueue);
1389         ieee80211_led_exit(local);
1390         kfree(local->int_scan_req);
1391 }
1392 EXPORT_SYMBOL(ieee80211_unregister_hw);
1393
1394 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1395 {
1396         WARN_ONCE(1, "Have pending ack frames!\n");
1397         kfree_skb(p);
1398         return 0;
1399 }
1400
1401 void ieee80211_free_hw(struct ieee80211_hw *hw)
1402 {
1403         struct ieee80211_local *local = hw_to_local(hw);
1404         enum nl80211_band band;
1405
1406         mutex_destroy(&local->iflist_mtx);
1407         mutex_destroy(&local->mtx);
1408
1409         if (local->wiphy_ciphers_allocated)
1410                 kfree(local->hw.wiphy->cipher_suites);
1411
1412         idr_for_each(&local->ack_status_frames,
1413                      ieee80211_free_ack_frame, NULL);
1414         idr_destroy(&local->ack_status_frames);
1415
1416         sta_info_stop(local);
1417
1418         ieee80211_free_led_names(local);
1419
1420         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1421                 if (!(local->sband_allocated & BIT(band)))
1422                         continue;
1423                 kfree(local->hw.wiphy->bands[band]);
1424         }
1425
1426         wiphy_free(local->hw.wiphy);
1427 }
1428 EXPORT_SYMBOL(ieee80211_free_hw);
1429
1430 static int __init ieee80211_init(void)
1431 {
1432         struct sk_buff *skb;
1433         int ret;
1434
1435         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1436         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1437                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1438
1439         ret = rc80211_minstrel_init();
1440         if (ret)
1441                 return ret;
1442
1443         ret = ieee80211_iface_init();
1444         if (ret)
1445                 goto err_netdev;
1446
1447         return 0;
1448  err_netdev:
1449         rc80211_minstrel_exit();
1450
1451         return ret;
1452 }
1453
1454 static void __exit ieee80211_exit(void)
1455 {
1456         rc80211_minstrel_exit();
1457
1458         ieee80211s_stop();
1459
1460         ieee80211_iface_exit();
1461
1462         rcu_barrier();
1463 }
1464
1465
1466 subsys_initcall(ieee80211_init);
1467 module_exit(ieee80211_exit);
1468
1469 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1470 MODULE_LICENSE("GPL");