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) 2018-2021 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(struct tasklet_struct *t)
 224 {
 225         struct ieee80211_local *local = from_tasklet(local, t, tasklet);
 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         /* we might do interface manipulations, so need both */
 265         rtnl_lock();
 266         wiphy_lock(local->hw.wiphy);
 267         list_for_each_entry(sdata, &local->interfaces, list) {
 268                 /*
 269                  * XXX: there may be more work for other vif types and even
 270                  * for station mode: a good thing would be to run most of
 271                  * the iface type's dependent _stop (ieee80211_mg_stop,
 272                  * ieee80211_ibss_stop) etc...
 273                  * For now, fix only the specific bug that was seen: race
 274                  * between csa_connection_drop_work and us.
 275                  */
 276                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 277                         /*
 278                          * This worker is scheduled from the iface worker that
 279                          * runs on mac80211's workqueue, so we can't be
 280                          * scheduling this worker after the cancel right here.
 281                          * The exception is ieee80211_chswitch_done.
 282                          * Then we can have a race...
 283                          */
 284                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 285                         if (sdata->vif.csa_active) {
 286                                 sdata_lock(sdata);
 287                                 ieee80211_sta_connection_lost(sdata,
 288                                                               sdata->u.mgd.associated->bssid,
 289                                                               WLAN_REASON_UNSPECIFIED, false);
 290                                 sdata_unlock(sdata);
 291                         }
 292                 }
 293                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 294         }
 295         ieee80211_scan_cancel(local);
 296
 297         /* make sure any new ROC will consider local->in_reconfig */
 298         flush_delayed_work(&local->roc_work);
 299         flush_work(&local->hw_roc_done);
 300
 301         /* wait for all packet processing to be done */
 302         synchronize_net();
 303
 304         ieee80211_reconfig(local);
 305         wiphy_unlock(local->hw.wiphy);
 306         rtnl_unlock();
 307 }
 308
 309 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 310 {
 311         struct ieee80211_local *local = hw_to_local(hw);
 312
 313         trace_api_restart_hw(local);
 314
 315         wiphy_info(hw->wiphy,
 316                    "Hardware restart was requested\n");
 317
 318         /* use this reason, ieee80211_reconfig will unblock it */
 319         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 320                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 321                                         false);
 322
 323         /*
 324          * Stop all Rx during the reconfig. We don't want state changes
 325          * or driver callbacks while this is in progress.
 326          */
 327         local->in_reconfig = true;
 328         barrier();
 329
 330         queue_work(system_freezable_wq, &local->restart_work);
 331 }
 332 EXPORT_SYMBOL(ieee80211_restart_hw);
 333
 334 #ifdef CONFIG_INET
 335 static int ieee80211_ifa_changed(struct notifier_block *nb,
 336                                  unsigned long data, void *arg)
 337 {
 338         struct in_ifaddr *ifa = arg;
 339         struct ieee80211_local *local =
 340                 container_of(nb, struct ieee80211_local,
 341                              ifa_notifier);
 342         struct net_device *ndev = ifa->ifa_dev->dev;
 343         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 344         struct in_device *idev;
 345         struct ieee80211_sub_if_data *sdata;
 346         struct ieee80211_bss_conf *bss_conf;
 347         struct ieee80211_if_managed *ifmgd;
 348         int c = 0;
 349
 350         /* Make sure it's our interface that got changed */
 351         if (!wdev)
 352                 return NOTIFY_DONE;
 353
 354         if (wdev->wiphy != local->hw.wiphy)
 355                 return NOTIFY_DONE;
 356
 357         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 358         bss_conf = &sdata->vif.bss_conf;
 359
 360         /* ARP filtering is only supported in managed mode */
 361         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 362                 return NOTIFY_DONE;
 363
 364         idev = __in_dev_get_rtnl(sdata->dev);
 365         if (!idev)
 366                 return NOTIFY_DONE;
 367
 368         ifmgd = &sdata->u.mgd;
 369         sdata_lock(sdata);
 370
 371         /* Copy the addresses to the bss_conf list */
 372         ifa = rtnl_dereference(idev->ifa_list);
 373         while (ifa) {
 374                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 375                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 376                 ifa = rtnl_dereference(ifa->ifa_next);
 377                 c++;
 378         }
 379
 380         bss_conf->arp_addr_cnt = c;
 381
 382         /* Configure driver only if associated (which also implies it is up) */
 383         if (ifmgd->associated)
 384                 ieee80211_bss_info_change_notify(sdata,
 385                                                  BSS_CHANGED_ARP_FILTER);
 386
 387         sdata_unlock(sdata);
 388
 389         return NOTIFY_OK;
 390 }
 391 #endif
 392
 393 #if IS_ENABLED(CONFIG_IPV6)
 394 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 395                                   unsigned long data, void *arg)
 396 {
 397         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 398         struct inet6_dev *idev = ifa->idev;
 399         struct net_device *ndev = ifa->idev->dev;
 400         struct ieee80211_local *local =
 401                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 402         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 403         struct ieee80211_sub_if_data *sdata;
 404
 405         /* Make sure it's our interface that got changed */
 406         if (!wdev || wdev->wiphy != local->hw.wiphy)
 407                 return NOTIFY_DONE;
 408
 409         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 410
 411         /*
 412          * For now only support station mode. This is mostly because
 413          * doing AP would have to handle AP_VLAN in some way ...
 414          */
 415         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 416                 return NOTIFY_DONE;
 417
 418         drv_ipv6_addr_change(local, sdata, idev);
 419
 420         return NOTIFY_OK;
 421 }
 422 #endif
 423
 424 /* There isn't a lot of sense in it, but you can transmit anything you like */
 425 static const struct ieee80211_txrx_stypes
 426 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 427         [NL80211_IFTYPE_ADHOC] = {
 428                 .tx = 0xffff,
 429                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 430                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 431                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 432                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 433         },
 434         [NL80211_IFTYPE_STATION] = {
 435                 .tx = 0xffff,
 436                 /*
 437                  * To support Pre Association Security Negotiation (PASN) while
 438                  * already associated to one AP, allow user space to register to
 439                  * Rx authentication frames, so that the user space logic would
 440                  * be able to receive/handle authentication frames from a
 441                  * different AP as part of PASN.
 442                  * It is expected that user space would intelligently register
 443                  * for Rx authentication frames, i.e., only when PASN is used
 444                  * and configure a match filter only for PASN authentication
 445                  * algorithm, as otherwise the MLME functionality of mac80211
 446                  * would be broken.
 447                  */
 448                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 449                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 450                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 451         },
 452         [NL80211_IFTYPE_AP] = {
 453                 .tx = 0xffff,
 454                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 455                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 456                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 457                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 458                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 459                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 460                         BIT(IEEE80211_STYPE_ACTION >> 4),
 461         },
 462         [NL80211_IFTYPE_AP_VLAN] = {
 463                 /* copy AP */
 464                 .tx = 0xffff,
 465                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 466                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 467                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 468                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 469                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 470                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 471                         BIT(IEEE80211_STYPE_ACTION >> 4),
 472         },
 473         [NL80211_IFTYPE_P2P_CLIENT] = {
 474                 .tx = 0xffff,
 475                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 476                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 477         },
 478         [NL80211_IFTYPE_P2P_GO] = {
 479                 .tx = 0xffff,
 480                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 481                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 482                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 483                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 484                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 485                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 486                         BIT(IEEE80211_STYPE_ACTION >> 4),
 487         },
 488         [NL80211_IFTYPE_MESH_POINT] = {
 489                 .tx = 0xffff,
 490                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 491                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 492                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 493         },
 494         [NL80211_IFTYPE_P2P_DEVICE] = {
 495                 .tx = 0xffff,
 496                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 497                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 498         },
 499 };
 500
 501 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 502         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 503                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 504
 505         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 506                                 IEEE80211_HT_CAP_MAX_AMSDU |
 507                                 IEEE80211_HT_CAP_SGI_20 |
 508                                 IEEE80211_HT_CAP_SGI_40 |
 509                                 IEEE80211_HT_CAP_TX_STBC |
 510                                 IEEE80211_HT_CAP_RX_STBC |
 511                                 IEEE80211_HT_CAP_LDPC_CODING |
 512                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 513         .mcs = {
 514                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 515                              0xff, 0xff, 0xff, 0xff, 0xff, },
 516         },
 517 };
 518
 519 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 520         .vht_cap_info =
 521                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 522                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 523                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 524                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 525                             IEEE80211_VHT_CAP_TXSTBC |
 526                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 527                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 528                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 529                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 530                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 531         .supp_mcs = {
 532                 .rx_mcs_map = cpu_to_le16(~0),
 533                 .tx_mcs_map = cpu_to_le16(~0),
 534         },
 535 };
 536
 537 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 538                                            const struct ieee80211_ops *ops,
 539                                            const char *requested_name)
 540 {
 541         struct ieee80211_local *local;
 542         int priv_size, i;
 543         struct wiphy *wiphy;
 544         bool use_chanctx;
 545
 546         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 547                     !ops->add_interface || !ops->remove_interface ||
 548                     !ops->configure_filter))
 549                 return NULL;
 550
 551         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 552                 return NULL;
 553
 554         /* check all or no channel context operations exist */
 555         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 556             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 557             !!ops->unassign_vif_chanctx;
 558         if (WARN_ON(i != 0 && i != 5))
 559                 return NULL;
 560         use_chanctx = i == 5;
 561
 562         /* Ensure 32-byte alignment of our private data and hw private data.
 563          * We use the wiphy priv data for both our ieee80211_local and for
 564          * the driver's private data
 565          *
 566          * In memory it'll be like this:
 567          *
 568          * +-------------------------+
 569          * | struct wiphy           |
 570          * +-------------------------+
 571          * | struct ieee80211_local  |
 572          * +-------------------------+
 573          * | driver's private data   |
 574          * +-------------------------+
 575          *
 576          */
 577         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 578
 579         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 580
 581         if (!wiphy)
 582                 return NULL;
 583
 584         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 585
 586         wiphy->privid = mac80211_wiphy_privid;
 587
 588         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 589                         WIPHY_FLAG_4ADDR_AP |
 590                         WIPHY_FLAG_4ADDR_STATION |
 591                         WIPHY_FLAG_REPORTS_OBSS |
 592                         WIPHY_FLAG_OFFCHAN_TX;
 593
 594         if (!use_chanctx || ops->remain_on_channel)
 595                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 596
 597         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 598                            NL80211_FEATURE_SAE |
 599                            NL80211_FEATURE_HT_IBSS |
 600                            NL80211_FEATURE_VIF_TXPOWER |
 601                            NL80211_FEATURE_MAC_ON_CREATE |
 602                            NL80211_FEATURE_USERSPACE_MPM |
 603                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 604         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 605         wiphy_ext_feature_set(wiphy,
 606                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 607         wiphy_ext_feature_set(wiphy,
 608                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 609         wiphy_ext_feature_set(wiphy,
 610                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 611         wiphy_ext_feature_set(wiphy,
 612                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 613
 614         if (!ops->hw_scan) {
 615                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 616                                    NL80211_FEATURE_AP_SCAN;
 617                 /*
 618                  * if the driver behaves correctly using the probe request
 619                  * (template) from mac80211, then both of these should be
 620                  * supported even with hw scan - but let drivers opt in.
 621                  */
 622                 wiphy_ext_feature_set(wiphy,
 623                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 624                 wiphy_ext_feature_set(wiphy,
 625                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 626         }
 627
 628         if (!ops->set_key)
 629                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 630
 631         if (ops->wake_tx_queue)
 632                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 633
 634         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 635
 636         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 637
 638         local = wiphy_priv(wiphy);
 639
 640         if (sta_info_init(local))
 641                 goto err_free;
 642
 643         local->hw.wiphy = wiphy;
 644
 645         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 646
 647         local->ops = ops;
 648         local->use_chanctx = use_chanctx;
 649
 650         /*
 651          * We need a bit of data queued to build aggregates properly, so
 652          * instruct the TCP stack to allow more than a single ms of data
 653          * to be queued in the stack. The value is a bit-shift of 1
 654          * second, so 7 is ~8ms of queued data. Only affects local TCP
 655          * sockets.
 656          * This is the default, anyhow - drivers may need to override it
 657          * for local reasons (longer buffers, longer completion time, or
 658          * similar).
 659          */
 660         local->hw.tx_sk_pacing_shift = 7;
 661
 662         /* set up some defaults */
 663         local->hw.queues = 1;
 664         local->hw.max_rates = 1;
 665         local->hw.max_report_rates = 0;
 666         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 667         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 668         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 669         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 670         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 671         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 672                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 673                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 674         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 675                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 676         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 677         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 678         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 679         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 680         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 681         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 682
 683         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 684
 685         wiphy->extended_capabilities = local->ext_capa;
 686         wiphy->extended_capabilities_mask = local->ext_capa;
 687         wiphy->extended_capabilities_len =
 688                 ARRAY_SIZE(local->ext_capa);
 689
 690         INIT_LIST_HEAD(&local->interfaces);
 691         INIT_LIST_HEAD(&local->mon_list);
 692
 693         __hw_addr_init(&local->mc_list);
 694
 695         mutex_init(&local->iflist_mtx);
 696         mutex_init(&local->mtx);
 697
 698         mutex_init(&local->key_mtx);
 699         spin_lock_init(&local->filter_lock);
 700         spin_lock_init(&local->rx_path_lock);
 701         spin_lock_init(&local->queue_stop_reason_lock);
 702
 703         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 704                 INIT_LIST_HEAD(&local->active_txqs[i]);
 705                 spin_lock_init(&local->active_txq_lock[i]);
 706                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 707                 local->aql_txq_limit_high[i] =
 708                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 709         }
 710
 711         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 712         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 713         atomic_set(&local->aql_total_pending_airtime, 0);
 714
 715         INIT_LIST_HEAD(&local->chanctx_list);
 716         mutex_init(&local->chanctx_mtx);
 717
 718         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 719
 720         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 721
 722         INIT_WORK(&local->radar_detected_work,
 723                   ieee80211_dfs_radar_detected_work);
 724
 725         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 726         local->smps_mode = IEEE80211_SMPS_OFF;
 727
 728         INIT_WORK(&local->dynamic_ps_enable_work,
 729                   ieee80211_dynamic_ps_enable_work);
 730         INIT_WORK(&local->dynamic_ps_disable_work,
 731                   ieee80211_dynamic_ps_disable_work);
 732         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 733
 734         INIT_WORK(&local->sched_scan_stopped_work,
 735                   ieee80211_sched_scan_stopped_work);
 736
 737         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 738
 739         spin_lock_init(&local->ack_status_lock);
 740         idr_init(&local->ack_status_frames);
 741
 742         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 743                 skb_queue_head_init(&local->pending[i]);
 744                 atomic_set(&local->agg_queue_stop[i], 0);
 745         }
 746         tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
 747
 748         if (ops->wake_tx_queue)
 749                 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
 750
 751         tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
 752
 753         skb_queue_head_init(&local->skb_queue);
 754         skb_queue_head_init(&local->skb_queue_unreliable);
 755         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 756
 757         ieee80211_alloc_led_names(local);
 758
 759         ieee80211_roc_setup(local);
 760
 761         local->hw.radiotap_timestamp.units_pos = -1;
 762         local->hw.radiotap_timestamp.accuracy = -1;
 763
 764         return &local->hw;
 765  err_free:
 766         wiphy_free(wiphy);
 767         return NULL;
 768 }
 769 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 770
 771 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 772 {
 773         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 774         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 775         int n_suites = 0, r = 0, w = 0;
 776         u32 *suites;
 777         static const u32 cipher_suites[] = {
 778                 /* keep WEP first, it may be removed below */
 779                 WLAN_CIPHER_SUITE_WEP40,
 780                 WLAN_CIPHER_SUITE_WEP104,
 781                 WLAN_CIPHER_SUITE_TKIP,
 782                 WLAN_CIPHER_SUITE_CCMP,
 783                 WLAN_CIPHER_SUITE_CCMP_256,
 784                 WLAN_CIPHER_SUITE_GCMP,
 785                 WLAN_CIPHER_SUITE_GCMP_256,
 786
 787                 /* keep last -- depends on hw flags! */
 788                 WLAN_CIPHER_SUITE_AES_CMAC,
 789                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 790                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 791                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 792         };
 793
 794         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 795             local->hw.wiphy->cipher_suites) {
 796                 /* If the driver advertises, or doesn't support SW crypto,
 797                  * we only need to remove WEP if necessary.
 798                  */
 799                 if (have_wep)
 800                         return 0;
 801
 802                 /* well if it has _no_ ciphers ... fine */
 803                 if (!local->hw.wiphy->n_cipher_suites)
 804                         return 0;
 805
 806                 /* Driver provides cipher suites, but we need to exclude WEP */
 807                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 808                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 809                                  GFP_KERNEL);
 810                 if (!suites)
 811                         return -ENOMEM;
 812
 813                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 814                         u32 suite = local->hw.wiphy->cipher_suites[r];
 815
 816                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 817                             suite == WLAN_CIPHER_SUITE_WEP104)
 818                                 continue;
 819                         suites[w++] = suite;
 820                 }
 821         } else if (!local->hw.cipher_schemes) {
 822                 /* If the driver doesn't have cipher schemes, there's nothing
 823                  * else to do other than assign the (software supported and
 824                  * perhaps offloaded) cipher suites.
 825                  */
 826                 local->hw.wiphy->cipher_suites = cipher_suites;
 827                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 828
 829                 if (!have_mfp)
 830                         local->hw.wiphy->n_cipher_suites -= 4;
 831
 832                 if (!have_wep) {
 833                         local->hw.wiphy->cipher_suites += 2;
 834                         local->hw.wiphy->n_cipher_suites -= 2;
 835                 }
 836
 837                 /* not dynamically allocated, so just return */
 838                 return 0;
 839         } else {
 840                 const struct ieee80211_cipher_scheme *cs;
 841
 842                 cs = local->hw.cipher_schemes;
 843
 844                 /* Driver specifies cipher schemes only (but not cipher suites
 845                  * including the schemes)
 846                  *
 847                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 848                  * CCMP-256, GCMP, and GCMP-256
 849                  */
 850                 n_suites = local->hw.n_cipher_schemes + 5;
 851
 852                 /* check if we have WEP40 and WEP104 */
 853                 if (have_wep)
 854                         n_suites += 2;
 855
 856                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 857                  * BIP-GMAC-256
 858                  */
 859                 if (have_mfp)
 860                         n_suites += 4;
 861
 862                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
 863                 if (!suites)
 864                         return -ENOMEM;
 865
 866                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 867                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 868                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 869                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 870                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 871
 872                 if (have_wep) {
 873                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 874                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 875                 }
 876
 877                 if (have_mfp) {
 878                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 879                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 880                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 881                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 882                 }
 883
 884                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 885                         suites[w++] = cs[r].cipher;
 886                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 887                                 kfree(suites);
 888                                 return -EINVAL;
 889                         }
 890                 }
 891         }
 892
 893         local->hw.wiphy->cipher_suites = suites;
 894         local->hw.wiphy->n_cipher_suites = w;
 895         local->wiphy_ciphers_allocated = true;
 896
 897         return 0;
 898 }
 899
 900 int ieee80211_register_hw(struct ieee80211_hw *hw)
 901 {
 902         struct ieee80211_local *local = hw_to_local(hw);
 903         int result, i;
 904         enum nl80211_band band;
 905         int channels, max_bitrates;
 906         bool supp_ht, supp_vht, supp_he;
 907         struct cfg80211_chan_def dflt_chandef = {};
 908
 909         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 910             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 911              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 912                 return -EINVAL;
 913
 914         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 915             (!local->ops->tdls_channel_switch ||
 916              !local->ops->tdls_cancel_channel_switch ||
 917              !local->ops->tdls_recv_channel_switch))
 918                 return -EOPNOTSUPP;
 919
 920         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 921                     !local->ops->set_frag_threshold))
 922                 return -EINVAL;
 923
 924         if (WARN_ON(local->hw.wiphy->interface_modes &
 925                         BIT(NL80211_IFTYPE_NAN) &&
 926                     (!local->ops->start_nan || !local->ops->stop_nan)))
 927                 return -EINVAL;
 928
 929 #ifdef CONFIG_PM
 930         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 931                 return -EINVAL;
 932 #endif
 933
 934         if (!local->use_chanctx) {
 935                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 936                         const struct ieee80211_iface_combination *comb;
 937
 938                         comb = &local->hw.wiphy->iface_combinations[i];
 939
 940                         if (comb->num_different_channels > 1)
 941                                 return -EINVAL;
 942                 }
 943         } else {
 944                 /* DFS is not supported with multi-channel combinations yet */
 945                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 946                         const struct ieee80211_iface_combination *comb;
 947
 948                         comb = &local->hw.wiphy->iface_combinations[i];
 949
 950                         if (comb->radar_detect_widths &&
 951                             comb->num_different_channels > 1)
 952                                 return -EINVAL;
 953                 }
 954         }
 955
 956         /* Only HW csum features are currently compatible with mac80211 */
 957         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
 958                 return -EINVAL;
 959
 960         if (hw->max_report_rates == 0)
 961                 hw->max_report_rates = hw->max_rates;
 962
 963         local->rx_chains = 1;
 964
 965         /*
 966          * generic code guarantees at least one band,
 967          * set this very early because much code assumes
 968          * that hw.conf.channel is assigned
 969          */
 970         channels = 0;
 971         max_bitrates = 0;
 972         supp_ht = false;
 973         supp_vht = false;
 974         supp_he = false;
 975         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 976                 struct ieee80211_supported_band *sband;
 977
 978                 sband = local->hw.wiphy->bands[band];
 979                 if (!sband)
 980                         continue;
 981
 982                 if (!dflt_chandef.chan) {
 983                         /*
 984                          * Assign the first enabled channel to dflt_chandef
 985                          * from the list of channels
 986                          */
 987                         for (i = 0; i < sband->n_channels; i++)
 988                                 if (!(sband->channels[i].flags &
 989                                                 IEEE80211_CHAN_DISABLED))
 990                                         break;
 991                         /* if none found then use the first anyway */
 992                         if (i == sband->n_channels)
 993                                 i = 0;
 994                         cfg80211_chandef_create(&dflt_chandef,
 995                                                 &sband->channels[i],
 996                                                 NL80211_CHAN_NO_HT);
 997                         /* init channel we're on */
 998                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 999                                 local->hw.conf.chandef = dflt_chandef;
1000                                 local->_oper_chandef = dflt_chandef;
1001                         }
1002                         local->monitor_chandef = dflt_chandef;
1003                 }
1004
1005                 channels += sband->n_channels;
1006
1007                 if (max_bitrates < sband->n_bitrates)
1008                         max_bitrates = sband->n_bitrates;
1009                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1010                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1011
1012                 if (!supp_he)
1013                         supp_he = !!ieee80211_get_he_sta_cap(sband);
1014
1015                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1016                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1017                             (supp_ht || supp_vht || supp_he)))
1018                         return -EINVAL;
1019
1020                 if (!sband->ht_cap.ht_supported)
1021                         continue;
1022
1023                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1024                 local->rx_chains =
1025                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1026                             local->rx_chains);
1027
1028                 /* no need to mask, SM_PS_DISABLED has all bits set */
1029                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1030                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1031         }
1032
1033         /* if low-level driver supports AP, we also support VLAN.
1034          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1035          * based on their support to transmit SW encrypted packets.
1036          */
1037         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1038             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1039                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1040                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1041         }
1042
1043         /* mac80211 always supports monitor */
1044         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1045         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1046
1047         /* mac80211 doesn't support more than one IBSS interface right now */
1048         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1049                 const struct ieee80211_iface_combination *c;
1050                 int j;
1051
1052                 c = &hw->wiphy->iface_combinations[i];
1053
1054                 for (j = 0; j < c->n_limits; j++)
1055                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1056                             c->limits[j].max > 1)
1057                                 return -EINVAL;
1058         }
1059
1060         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1061                                       sizeof(void *) * channels, GFP_KERNEL);
1062         if (!local->int_scan_req)
1063                 return -ENOMEM;
1064
1065         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1066                 if (!local->hw.wiphy->bands[band])
1067                         continue;
1068                 local->int_scan_req->rates[band] = (u32) -1;
1069         }
1070
1071 #ifndef CONFIG_MAC80211_MESH
1072         /* mesh depends on Kconfig, but drivers should set it if they want */
1073         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1074 #endif
1075
1076         /* if the underlying driver supports mesh, mac80211 will (at least)
1077          * provide routing of mesh authentication frames to userspace */
1078         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1079                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1080
1081         /* mac80211 supports control port protocol changing */
1082         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1083
1084         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1085                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1086         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1087                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1088                 if (hw->max_signal <= 0) {
1089                         result = -EINVAL;
1090                         goto fail_workqueue;
1091                 }
1092         }
1093
1094         /* Mac80211 and therefore all drivers using SW crypto only
1095          * are able to handle PTK rekeys and Extended Key ID.
1096          */
1097         if (!local->ops->set_key) {
1098                 wiphy_ext_feature_set(local->hw.wiphy,
1099                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1100                 wiphy_ext_feature_set(local->hw.wiphy,
1101                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1102         }
1103
1104         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1105                 wiphy_ext_feature_set(local->hw.wiphy,
1106                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1107
1108         /*
1109          * Calculate scan IE length -- we need this to alloc
1110          * memory and to subtract from the driver limit. It
1111          * includes the DS Params, (extended) supported rates, and HT
1112          * information -- SSID is the driver's responsibility.
1113          */
1114         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1115                 3 /* DS Params */;
1116         if (supp_ht)
1117                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1118
1119         if (supp_vht)
1120                 local->scan_ies_len +=
1121                         2 + sizeof(struct ieee80211_vht_cap);
1122
1123         /* HE cap element is variable in size - set len to allow max size */
1124         /*
1125          * TODO: 1 is added at the end of the calculation to accommodate for
1126          *      the temporary placing of the HE capabilities IE under EXT.
1127          *      Remove it once it is placed in the final place.
1128          */
1129         if (supp_he)
1130                 local->scan_ies_len +=
1131                         2 + sizeof(struct ieee80211_he_cap_elem) +
1132                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1133                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1134
1135         if (!local->ops->hw_scan) {
1136                 /* For hw_scan, driver needs to set these up. */
1137                 local->hw.wiphy->max_scan_ssids = 4;
1138                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1139         }
1140
1141         /*
1142          * If the driver supports any scan IEs, then assume the
1143          * limit includes the IEs mac80211 will add, otherwise
1144          * leave it at zero and let the driver sort it out; we
1145          * still pass our IEs to the driver but userspace will
1146          * not be allowed to in that case.
1147          */
1148         if (local->hw.wiphy->max_scan_ie_len)
1149                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1150
1151         if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1152                                              local->hw.n_cipher_schemes))) {
1153                 result = -EINVAL;
1154                 goto fail_workqueue;
1155         }
1156
1157         result = ieee80211_init_cipher_suites(local);
1158         if (result < 0)
1159                 goto fail_workqueue;
1160
1161         if (!local->ops->remain_on_channel)
1162                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1163
1164         /* mac80211 based drivers don't support internal TDLS setup */
1165         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1166                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1167
1168         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1169         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1170                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1171
1172         /* mac80211 supports multi BSSID, if the driver supports it */
1173         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1174                 local->hw.wiphy->support_mbssid = true;
1175                 if (ieee80211_hw_check(&local->hw,
1176                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1177                         local->hw.wiphy->support_only_he_mbssid = true;
1178                 else
1179                         local->ext_capa[2] |=
1180                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1181         }
1182
1183         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1184
1185         /*
1186          * We use the number of queues for feature tests (QoS, HT) internally
1187          * so restrict them appropriately.
1188          */
1189         if (hw->queues > IEEE80211_MAX_QUEUES)
1190                 hw->queues = IEEE80211_MAX_QUEUES;
1191
1192         local->workqueue =
1193                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1194         if (!local->workqueue) {
1195                 result = -ENOMEM;
1196                 goto fail_workqueue;
1197         }
1198
1199         /*
1200          * The hardware needs headroom for sending the frame,
1201          * and we need some headroom for passing the frame to monitor
1202          * interfaces, but never both at the same time.
1203          */
1204         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1205                                    IEEE80211_TX_STATUS_HEADROOM);
1206
1207         /*
1208          * if the driver doesn't specify a max listen interval we
1209          * use 5 which should be a safe default
1210          */
1211         if (local->hw.max_listen_interval == 0)
1212                 local->hw.max_listen_interval = 5;
1213
1214         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1215
1216         local->dynamic_ps_forced_timeout = -1;
1217
1218         if (!local->hw.max_nan_de_entries)
1219                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1220
1221         if (!local->hw.weight_multiplier)
1222                 local->hw.weight_multiplier = 1;
1223
1224         ieee80211_wep_init(local);
1225
1226         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1227
1228         ieee80211_led_init(local);
1229
1230         result = ieee80211_txq_setup_flows(local);
1231         if (result)
1232                 goto fail_flows;
1233
1234         rtnl_lock();
1235         result = ieee80211_init_rate_ctrl_alg(local,
1236                                               hw->rate_control_algorithm);
1237         rtnl_unlock();
1238         if (result < 0) {
1239                 wiphy_debug(local->hw.wiphy,
1240                             "Failed to initialize rate control algorithm\n");
1241                 goto fail_rate;
1242         }
1243
1244         if (local->rate_ctrl) {
1245                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1246                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1247                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1248         }
1249
1250         /*
1251          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1252          * or have it when we don't, copy the sband structure and set/clear it.
1253          * This is necessary because rate scaling algorithms could be switched
1254          * and have different support values.
1255          * Print a message so that in the common case the reallocation can be
1256          * avoided.
1257          */
1258         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1259         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1260                 struct ieee80211_supported_band *sband;
1261                 bool local_cap, ie_cap;
1262
1263                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1264
1265                 sband = local->hw.wiphy->bands[band];
1266                 if (!sband || !sband->vht_cap.vht_supported)
1267                         continue;
1268
1269                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1270                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1271
1272                 if (local_cap == ie_cap)
1273                         continue;
1274
1275                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1276                 if (!sband) {
1277                         result = -ENOMEM;
1278                         goto fail_rate;
1279                 }
1280
1281                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1282                           band);
1283
1284                 sband->vht_cap.vht_mcs.tx_highest ^=
1285                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1286
1287                 local->hw.wiphy->bands[band] = sband;
1288                 local->sband_allocated |= BIT(band);
1289         }
1290
1291         result = wiphy_register(local->hw.wiphy);
1292         if (result < 0)
1293                 goto fail_wiphy_register;
1294
1295         debugfs_hw_add(local);
1296         rate_control_add_debugfs(local);
1297
1298         rtnl_lock();
1299         wiphy_lock(hw->wiphy);
1300
1301         /* add one default STA interface if supported */
1302         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1303             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1304                 struct vif_params params = {0};
1305
1306                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1307                                           NL80211_IFTYPE_STATION, &params);
1308                 if (result)
1309                         wiphy_warn(local->hw.wiphy,
1310                                    "Failed to add default virtual iface\n");
1311         }
1312
1313         wiphy_unlock(hw->wiphy);
1314         rtnl_unlock();
1315
1316 #ifdef CONFIG_INET
1317         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1318         result = register_inetaddr_notifier(&local->ifa_notifier);
1319         if (result)
1320                 goto fail_ifa;
1321 #endif
1322
1323 #if IS_ENABLED(CONFIG_IPV6)
1324         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1325         result = register_inet6addr_notifier(&local->ifa6_notifier);
1326         if (result)
1327                 goto fail_ifa6;
1328 #endif
1329
1330         return 0;
1331
1332 #if IS_ENABLED(CONFIG_IPV6)
1333  fail_ifa6:
1334 #ifdef CONFIG_INET
1335         unregister_inetaddr_notifier(&local->ifa_notifier);
1336 #endif
1337 #endif
1338 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1339  fail_ifa:
1340 #endif
1341         wiphy_unregister(local->hw.wiphy);
1342  fail_wiphy_register:
1343         rtnl_lock();
1344         rate_control_deinitialize(local);
1345         ieee80211_remove_interfaces(local);
1346         rtnl_unlock();
1347  fail_rate:
1348  fail_flows:
1349         ieee80211_led_exit(local);
1350         destroy_workqueue(local->workqueue);
1351  fail_workqueue:
1352         if (local->wiphy_ciphers_allocated)
1353                 kfree(local->hw.wiphy->cipher_suites);
1354         kfree(local->int_scan_req);
1355         return result;
1356 }
1357 EXPORT_SYMBOL(ieee80211_register_hw);
1358
1359 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1360 {
1361         struct ieee80211_local *local = hw_to_local(hw);
1362
1363         tasklet_kill(&local->tx_pending_tasklet);
1364         tasklet_kill(&local->tasklet);
1365
1366 #ifdef CONFIG_INET
1367         unregister_inetaddr_notifier(&local->ifa_notifier);
1368 #endif
1369 #if IS_ENABLED(CONFIG_IPV6)
1370         unregister_inet6addr_notifier(&local->ifa6_notifier);
1371 #endif
1372
1373         rtnl_lock();
1374
1375         /*
1376          * At this point, interface list manipulations are fine
1377          * because the driver cannot be handing us frames any
1378          * more and the tasklet is killed.
1379          */
1380         ieee80211_remove_interfaces(local);
1381
1382         rtnl_unlock();
1383
1384         cancel_delayed_work_sync(&local->roc_work);
1385         cancel_work_sync(&local->restart_work);
1386         cancel_work_sync(&local->reconfig_filter);
1387         cancel_work_sync(&local->tdls_chsw_work);
1388         flush_work(&local->sched_scan_stopped_work);
1389         flush_work(&local->radar_detected_work);
1390
1391         ieee80211_clear_tx_pending(local);
1392         rate_control_deinitialize(local);
1393
1394         if (skb_queue_len(&local->skb_queue) ||
1395             skb_queue_len(&local->skb_queue_unreliable))
1396                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1397         skb_queue_purge(&local->skb_queue);
1398         skb_queue_purge(&local->skb_queue_unreliable);
1399         skb_queue_purge(&local->skb_queue_tdls_chsw);
1400
1401         wiphy_unregister(local->hw.wiphy);
1402         destroy_workqueue(local->workqueue);
1403         ieee80211_led_exit(local);
1404         kfree(local->int_scan_req);
1405 }
1406 EXPORT_SYMBOL(ieee80211_unregister_hw);
1407
1408 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1409 {
1410         WARN_ONCE(1, "Have pending ack frames!\n");
1411         kfree_skb(p);
1412         return 0;
1413 }
1414
1415 void ieee80211_free_hw(struct ieee80211_hw *hw)
1416 {
1417         struct ieee80211_local *local = hw_to_local(hw);
1418         enum nl80211_band band;
1419
1420         mutex_destroy(&local->iflist_mtx);
1421         mutex_destroy(&local->mtx);
1422
1423         if (local->wiphy_ciphers_allocated)
1424                 kfree(local->hw.wiphy->cipher_suites);
1425
1426         idr_for_each(&local->ack_status_frames,
1427                      ieee80211_free_ack_frame, NULL);
1428         idr_destroy(&local->ack_status_frames);
1429
1430         sta_info_stop(local);
1431
1432         ieee80211_free_led_names(local);
1433
1434         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1435                 if (!(local->sband_allocated & BIT(band)))
1436                         continue;
1437                 kfree(local->hw.wiphy->bands[band]);
1438         }
1439
1440         wiphy_free(local->hw.wiphy);
1441 }
1442 EXPORT_SYMBOL(ieee80211_free_hw);
1443
1444 static int __init ieee80211_init(void)
1445 {
1446         struct sk_buff *skb;
1447         int ret;
1448
1449         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1450         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1451                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1452
1453         ret = rc80211_minstrel_init();
1454         if (ret)
1455                 return ret;
1456
1457         ret = ieee80211_iface_init();
1458         if (ret)
1459                 goto err_netdev;
1460
1461         return 0;
1462  err_netdev:
1463         rc80211_minstrel_exit();
1464
1465         return ret;
1466 }
1467
1468 static void __exit ieee80211_exit(void)
1469 {
1470         rc80211_minstrel_exit();
1471
1472         ieee80211s_stop();
1473
1474         ieee80211_iface_exit();
1475
1476         rcu_barrier();
1477 }
1478
1479
1480 subsys_initcall(ieee80211_init);
1481 module_exit(ieee80211_exit);
1482
1483 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1484 MODULE_LICENSE("GPL");