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) 2018-2022 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.bss_conf.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                              IEEE80211_CONF_CHANGE_SMPS);
 180
 181         if (changed && local->open_count) {
 182                 ret = drv_config(local, changed);
 183                 /*
 184                  * Goal:
 185                  * HW reconfiguration should never fail, the driver has told
 186                  * us what it can support so it should live up to that promise.
 187                  *
 188                  * Current status:
 189                  * rfkill is not integrated with mac80211 and a
 190                  * configuration command can thus fail if hardware rfkill
 191                  * is enabled
 192                  *
 193                  * FIXME: integrate rfkill with mac80211 and then add this
 194                  * WARN_ON() back
 195                  *
 196                  */
 197                 /* WARN_ON(ret); */
 198         }
 199
 200         return ret;
 201 }
 202
 203 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
 204                                    BSS_CHANGED_IDLE |\
 205                                    BSS_CHANGED_PS |\
 206                                    BSS_CHANGED_IBSS |\
 207                                    BSS_CHANGED_ARP_FILTER |\
 208                                    BSS_CHANGED_SSID)
 209
 210 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 211                                       u64 changed)
 212 {
 213         struct ieee80211_local *local = sdata->local;
 214
 215         might_sleep();
 216
 217         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 218                 return;
 219
 220         if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
 221                                     BSS_CHANGED_BEACON_ENABLED) &&
 222                          sdata->vif.type != NL80211_IFTYPE_AP &&
 223                          sdata->vif.type != NL80211_IFTYPE_ADHOC &&
 224                          sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
 225                          sdata->vif.type != NL80211_IFTYPE_OCB))
 226                 return;
 227
 228         if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
 229                          sdata->vif.type == NL80211_IFTYPE_NAN ||
 230                          (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
 231                           !sdata->vif.bss_conf.mu_mimo_owner &&
 232                           !(changed & BSS_CHANGED_TXPOWER))))
 233                 return;
 234
 235         if (!check_sdata_in_driver(sdata))
 236                 return;
 237
 238         if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
 239                 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
 240
 241                 trace_drv_vif_cfg_changed(local, sdata, changed);
 242                 if (local->ops->vif_cfg_changed)
 243                         local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
 244         }
 245
 246         if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
 247                 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
 248
 249                 /* FIXME: should be for each link */
 250                 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
 251                                             changed);
 252                 if (local->ops->link_info_changed)
 253                         local->ops->link_info_changed(&local->hw, &sdata->vif,
 254                                                       &sdata->vif.bss_conf, ch);
 255         }
 256
 257         if (local->ops->bss_info_changed)
 258                 local->ops->bss_info_changed(&local->hw, &sdata->vif,
 259                                              &sdata->vif.bss_conf, changed);
 260         trace_drv_return_void(local);
 261 }
 262
 263 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
 264                                      u64 changed)
 265 {
 266         struct ieee80211_local *local = sdata->local;
 267
 268         WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
 269
 270         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 271                 return;
 272
 273         drv_vif_cfg_changed(local, sdata, changed);
 274 }
 275
 276 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
 277                                        struct ieee80211_link_data *link,
 278                                        u64 changed)
 279 {
 280         struct ieee80211_local *local = sdata->local;
 281
 282         WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
 283
 284         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 285                 return;
 286
 287         if (!check_sdata_in_driver(sdata))
 288                 return;
 289
 290         drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
 291 }
 292
 293 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 294 {
 295         sdata->vif.bss_conf.use_cts_prot = false;
 296         sdata->vif.bss_conf.use_short_preamble = false;
 297         sdata->vif.bss_conf.use_short_slot = false;
 298         return BSS_CHANGED_ERP_CTS_PROT |
 299                BSS_CHANGED_ERP_PREAMBLE |
 300                BSS_CHANGED_ERP_SLOT;
 301 }
 302
 303 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
 304 {
 305         struct ieee80211_local *local = from_tasklet(local, t, tasklet);
 306         struct sk_buff *skb;
 307
 308         while ((skb = skb_dequeue(&local->skb_queue)) ||
 309                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 310                 switch (skb->pkt_type) {
 311                 case IEEE80211_RX_MSG:
 312                         /* Clear skb->pkt_type in order to not confuse kernel
 313                          * netstack. */
 314                         skb->pkt_type = 0;
 315                         ieee80211_rx(&local->hw, skb);
 316                         break;
 317                 case IEEE80211_TX_STATUS_MSG:
 318                         skb->pkt_type = 0;
 319                         ieee80211_tx_status(&local->hw, skb);
 320                         break;
 321                 default:
 322                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 323                              skb->pkt_type);
 324                         dev_kfree_skb(skb);
 325                         break;
 326                 }
 327         }
 328 }
 329
 330 static void ieee80211_restart_work(struct work_struct *work)
 331 {
 332         struct ieee80211_local *local =
 333                 container_of(work, struct ieee80211_local, restart_work);
 334         struct ieee80211_sub_if_data *sdata;
 335         int ret;
 336
 337         /* wait for scan work complete */
 338         flush_workqueue(local->workqueue);
 339         flush_work(&local->sched_scan_stopped_work);
 340         flush_work(&local->radar_detected_work);
 341
 342         rtnl_lock();
 343         /* we might do interface manipulations, so need both */
 344         wiphy_lock(local->hw.wiphy);
 345
 346         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 347              "%s called with hardware scan in progress\n", __func__);
 348
 349         list_for_each_entry(sdata, &local->interfaces, list) {
 350                 /*
 351                  * XXX: there may be more work for other vif types and even
 352                  * for station mode: a good thing would be to run most of
 353                  * the iface type's dependent _stop (ieee80211_mg_stop,
 354                  * ieee80211_ibss_stop) etc...
 355                  * For now, fix only the specific bug that was seen: race
 356                  * between csa_connection_drop_work and us.
 357                  */
 358                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 359                         /*
 360                          * This worker is scheduled from the iface worker that
 361                          * runs on mac80211's workqueue, so we can't be
 362                          * scheduling this worker after the cancel right here.
 363                          * The exception is ieee80211_chswitch_done.
 364                          * Then we can have a race...
 365                          */
 366                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 367                         if (sdata->vif.bss_conf.csa_active) {
 368                                 sdata_lock(sdata);
 369                                 ieee80211_sta_connection_lost(sdata,
 370                                                               WLAN_REASON_UNSPECIFIED,
 371                                                               false);
 372                                 sdata_unlock(sdata);
 373                         }
 374                 }
 375                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 376         }
 377         ieee80211_scan_cancel(local);
 378
 379         /* make sure any new ROC will consider local->in_reconfig */
 380         flush_delayed_work(&local->roc_work);
 381         flush_work(&local->hw_roc_done);
 382
 383         /* wait for all packet processing to be done */
 384         synchronize_net();
 385
 386         ret = ieee80211_reconfig(local);
 387         wiphy_unlock(local->hw.wiphy);
 388
 389         if (ret)
 390                 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
 391
 392         rtnl_unlock();
 393 }
 394
 395 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 396 {
 397         struct ieee80211_local *local = hw_to_local(hw);
 398
 399         trace_api_restart_hw(local);
 400
 401         wiphy_info(hw->wiphy,
 402                    "Hardware restart was requested\n");
 403
 404         /* use this reason, ieee80211_reconfig will unblock it */
 405         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 406                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 407                                         false);
 408
 409         /*
 410          * Stop all Rx during the reconfig. We don't want state changes
 411          * or driver callbacks while this is in progress.
 412          */
 413         local->in_reconfig = true;
 414         barrier();
 415
 416         queue_work(system_freezable_wq, &local->restart_work);
 417 }
 418 EXPORT_SYMBOL(ieee80211_restart_hw);
 419
 420 #ifdef CONFIG_INET
 421 static int ieee80211_ifa_changed(struct notifier_block *nb,
 422                                  unsigned long data, void *arg)
 423 {
 424         struct in_ifaddr *ifa = arg;
 425         struct ieee80211_local *local =
 426                 container_of(nb, struct ieee80211_local,
 427                              ifa_notifier);
 428         struct net_device *ndev = ifa->ifa_dev->dev;
 429         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 430         struct in_device *idev;
 431         struct ieee80211_sub_if_data *sdata;
 432         struct ieee80211_vif_cfg *vif_cfg;
 433         struct ieee80211_if_managed *ifmgd;
 434         int c = 0;
 435
 436         /* Make sure it's our interface that got changed */
 437         if (!wdev)
 438                 return NOTIFY_DONE;
 439
 440         if (wdev->wiphy != local->hw.wiphy)
 441                 return NOTIFY_DONE;
 442
 443         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 444         vif_cfg = &sdata->vif.cfg;
 445
 446         /* ARP filtering is only supported in managed mode */
 447         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 448                 return NOTIFY_DONE;
 449
 450         idev = __in_dev_get_rtnl(sdata->dev);
 451         if (!idev)
 452                 return NOTIFY_DONE;
 453
 454         ifmgd = &sdata->u.mgd;
 455         sdata_lock(sdata);
 456
 457         /* Copy the addresses to the vif config list */
 458         ifa = rtnl_dereference(idev->ifa_list);
 459         while (ifa) {
 460                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 461                         vif_cfg->arp_addr_list[c] = ifa->ifa_address;
 462                 ifa = rtnl_dereference(ifa->ifa_next);
 463                 c++;
 464         }
 465
 466         vif_cfg->arp_addr_cnt = c;
 467
 468         /* Configure driver only if associated (which also implies it is up) */
 469         if (ifmgd->associated)
 470                 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
 471
 472         sdata_unlock(sdata);
 473
 474         return NOTIFY_OK;
 475 }
 476 #endif
 477
 478 #if IS_ENABLED(CONFIG_IPV6)
 479 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 480                                   unsigned long data, void *arg)
 481 {
 482         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 483         struct inet6_dev *idev = ifa->idev;
 484         struct net_device *ndev = ifa->idev->dev;
 485         struct ieee80211_local *local =
 486                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 487         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 488         struct ieee80211_sub_if_data *sdata;
 489
 490         /* Make sure it's our interface that got changed */
 491         if (!wdev || wdev->wiphy != local->hw.wiphy)
 492                 return NOTIFY_DONE;
 493
 494         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 495
 496         /*
 497          * For now only support station mode. This is mostly because
 498          * doing AP would have to handle AP_VLAN in some way ...
 499          */
 500         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 501                 return NOTIFY_DONE;
 502
 503         drv_ipv6_addr_change(local, sdata, idev);
 504
 505         return NOTIFY_OK;
 506 }
 507 #endif
 508
 509 /* There isn't a lot of sense in it, but you can transmit anything you like */
 510 static const struct ieee80211_txrx_stypes
 511 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 512         [NL80211_IFTYPE_ADHOC] = {
 513                 .tx = 0xffff,
 514                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 515                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 516                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 517                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 518         },
 519         [NL80211_IFTYPE_STATION] = {
 520                 .tx = 0xffff,
 521                 /*
 522                  * To support Pre Association Security Negotiation (PASN) while
 523                  * already associated to one AP, allow user space to register to
 524                  * Rx authentication frames, so that the user space logic would
 525                  * be able to receive/handle authentication frames from a
 526                  * different AP as part of PASN.
 527                  * It is expected that user space would intelligently register
 528                  * for Rx authentication frames, i.e., only when PASN is used
 529                  * and configure a match filter only for PASN authentication
 530                  * algorithm, as otherwise the MLME functionality of mac80211
 531                  * would be broken.
 532                  */
 533                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 534                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 535                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 536         },
 537         [NL80211_IFTYPE_AP] = {
 538                 .tx = 0xffff,
 539                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 540                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 541                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 542                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 543                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 544                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 545                         BIT(IEEE80211_STYPE_ACTION >> 4),
 546         },
 547         [NL80211_IFTYPE_AP_VLAN] = {
 548                 /* copy AP */
 549                 .tx = 0xffff,
 550                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 551                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 552                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 553                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 554                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 555                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 556                         BIT(IEEE80211_STYPE_ACTION >> 4),
 557         },
 558         [NL80211_IFTYPE_P2P_CLIENT] = {
 559                 .tx = 0xffff,
 560                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 561                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 562         },
 563         [NL80211_IFTYPE_P2P_GO] = {
 564                 .tx = 0xffff,
 565                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 566                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 567                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 568                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 569                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 570                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 571                         BIT(IEEE80211_STYPE_ACTION >> 4),
 572         },
 573         [NL80211_IFTYPE_MESH_POINT] = {
 574                 .tx = 0xffff,
 575                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 576                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 577                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 578         },
 579         [NL80211_IFTYPE_P2P_DEVICE] = {
 580                 .tx = 0xffff,
 581                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 582                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 583         },
 584 };
 585
 586 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 587         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 588                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 589
 590         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 591                                 IEEE80211_HT_CAP_MAX_AMSDU |
 592                                 IEEE80211_HT_CAP_SGI_20 |
 593                                 IEEE80211_HT_CAP_SGI_40 |
 594                                 IEEE80211_HT_CAP_TX_STBC |
 595                                 IEEE80211_HT_CAP_RX_STBC |
 596                                 IEEE80211_HT_CAP_LDPC_CODING |
 597                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 598         .mcs = {
 599                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 600                              0xff, 0xff, 0xff, 0xff, 0xff, },
 601         },
 602 };
 603
 604 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 605         .vht_cap_info =
 606                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 607                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 608                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 609                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 610                             IEEE80211_VHT_CAP_TXSTBC |
 611                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 612                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 613                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 614                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 615                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 616         .supp_mcs = {
 617                 .rx_mcs_map = cpu_to_le16(~0),
 618                 .tx_mcs_map = cpu_to_le16(~0),
 619         },
 620 };
 621
 622 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 623                                            const struct ieee80211_ops *ops,
 624                                            const char *requested_name)
 625 {
 626         struct ieee80211_local *local;
 627         int priv_size, i;
 628         struct wiphy *wiphy;
 629         bool use_chanctx;
 630
 631         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 632                     !ops->add_interface || !ops->remove_interface ||
 633                     !ops->configure_filter))
 634                 return NULL;
 635
 636         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 637                 return NULL;
 638
 639         if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
 640                     (ops->link_info_changed && ops->bss_info_changed)))
 641                 return NULL;
 642
 643         /* check all or no channel context operations exist */
 644         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 645             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 646             !!ops->unassign_vif_chanctx;
 647         if (WARN_ON(i != 0 && i != 5))
 648                 return NULL;
 649         use_chanctx = i == 5;
 650
 651         /* Ensure 32-byte alignment of our private data and hw private data.
 652          * We use the wiphy priv data for both our ieee80211_local and for
 653          * the driver's private data
 654          *
 655          * In memory it'll be like this:
 656          *
 657          * +-------------------------+
 658          * | struct wiphy           |
 659          * +-------------------------+
 660          * | struct ieee80211_local  |
 661          * +-------------------------+
 662          * | driver's private data   |
 663          * +-------------------------+
 664          *
 665          */
 666         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 667
 668         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 669
 670         if (!wiphy)
 671                 return NULL;
 672
 673         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 674
 675         wiphy->privid = mac80211_wiphy_privid;
 676
 677         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 678                         WIPHY_FLAG_4ADDR_AP |
 679                         WIPHY_FLAG_4ADDR_STATION |
 680                         WIPHY_FLAG_REPORTS_OBSS |
 681                         WIPHY_FLAG_OFFCHAN_TX;
 682
 683         if (!use_chanctx || ops->remain_on_channel)
 684                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 685
 686         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 687                            NL80211_FEATURE_SAE |
 688                            NL80211_FEATURE_HT_IBSS |
 689                            NL80211_FEATURE_VIF_TXPOWER |
 690                            NL80211_FEATURE_MAC_ON_CREATE |
 691                            NL80211_FEATURE_USERSPACE_MPM |
 692                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 693         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 694         wiphy_ext_feature_set(wiphy,
 695                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 696         wiphy_ext_feature_set(wiphy,
 697                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 698         wiphy_ext_feature_set(wiphy,
 699                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
 700         wiphy_ext_feature_set(wiphy,
 701                               NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
 702         wiphy_ext_feature_set(wiphy,
 703                               NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
 704
 705         if (!ops->hw_scan) {
 706                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 707                                    NL80211_FEATURE_AP_SCAN;
 708                 /*
 709                  * if the driver behaves correctly using the probe request
 710                  * (template) from mac80211, then both of these should be
 711                  * supported even with hw scan - but let drivers opt in.
 712                  */
 713                 wiphy_ext_feature_set(wiphy,
 714                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 715                 wiphy_ext_feature_set(wiphy,
 716                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 717         }
 718
 719         if (!ops->set_key)
 720                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 721
 722         if (ops->wake_tx_queue)
 723                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 724
 725         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 726
 727         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 728
 729         local = wiphy_priv(wiphy);
 730
 731         if (sta_info_init(local))
 732                 goto err_free;
 733
 734         local->hw.wiphy = wiphy;
 735
 736         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 737
 738         local->ops = ops;
 739         local->use_chanctx = use_chanctx;
 740
 741         /*
 742          * We need a bit of data queued to build aggregates properly, so
 743          * instruct the TCP stack to allow more than a single ms of data
 744          * to be queued in the stack. The value is a bit-shift of 1
 745          * second, so 7 is ~8ms of queued data. Only affects local TCP
 746          * sockets.
 747          * This is the default, anyhow - drivers may need to override it
 748          * for local reasons (longer buffers, longer completion time, or
 749          * similar).
 750          */
 751         local->hw.tx_sk_pacing_shift = 7;
 752
 753         /* set up some defaults */
 754         local->hw.queues = 1;
 755         local->hw.max_rates = 1;
 756         local->hw.max_report_rates = 0;
 757         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 758         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 759         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 760         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 761         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 762         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 763                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 764                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 765         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 766                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 767         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 768         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 769         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 770         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 771         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 772         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 773
 774         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 775
 776         wiphy->extended_capabilities = local->ext_capa;
 777         wiphy->extended_capabilities_mask = local->ext_capa;
 778         wiphy->extended_capabilities_len =
 779                 ARRAY_SIZE(local->ext_capa);
 780
 781         INIT_LIST_HEAD(&local->interfaces);
 782         INIT_LIST_HEAD(&local->mon_list);
 783
 784         __hw_addr_init(&local->mc_list);
 785
 786         mutex_init(&local->iflist_mtx);
 787         mutex_init(&local->mtx);
 788
 789         mutex_init(&local->key_mtx);
 790         spin_lock_init(&local->filter_lock);
 791         spin_lock_init(&local->rx_path_lock);
 792         spin_lock_init(&local->queue_stop_reason_lock);
 793
 794         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 795                 INIT_LIST_HEAD(&local->active_txqs[i]);
 796                 spin_lock_init(&local->active_txq_lock[i]);
 797                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 798                 local->aql_txq_limit_high[i] =
 799                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 800                 atomic_set(&local->aql_ac_pending_airtime[i], 0);
 801         }
 802
 803         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 804         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 805         atomic_set(&local->aql_total_pending_airtime, 0);
 806
 807         INIT_LIST_HEAD(&local->chanctx_list);
 808         mutex_init(&local->chanctx_mtx);
 809
 810         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 811
 812         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 813
 814         INIT_WORK(&local->radar_detected_work,
 815                   ieee80211_dfs_radar_detected_work);
 816
 817         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 818         local->smps_mode = IEEE80211_SMPS_OFF;
 819
 820         INIT_WORK(&local->dynamic_ps_enable_work,
 821                   ieee80211_dynamic_ps_enable_work);
 822         INIT_WORK(&local->dynamic_ps_disable_work,
 823                   ieee80211_dynamic_ps_disable_work);
 824         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 825
 826         INIT_WORK(&local->sched_scan_stopped_work,
 827                   ieee80211_sched_scan_stopped_work);
 828
 829         spin_lock_init(&local->ack_status_lock);
 830         idr_init(&local->ack_status_frames);
 831
 832         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 833                 skb_queue_head_init(&local->pending[i]);
 834                 atomic_set(&local->agg_queue_stop[i], 0);
 835         }
 836         tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
 837
 838         if (ops->wake_tx_queue)
 839                 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
 840
 841         tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
 842
 843         skb_queue_head_init(&local->skb_queue);
 844         skb_queue_head_init(&local->skb_queue_unreliable);
 845
 846         ieee80211_alloc_led_names(local);
 847
 848         ieee80211_roc_setup(local);
 849
 850         local->hw.radiotap_timestamp.units_pos = -1;
 851         local->hw.radiotap_timestamp.accuracy = -1;
 852
 853         return &local->hw;
 854  err_free:
 855         wiphy_free(wiphy);
 856         return NULL;
 857 }
 858 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 859
 860 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 861 {
 862         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 863         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 864         int r = 0, w = 0;
 865         u32 *suites;
 866         static const u32 cipher_suites[] = {
 867                 /* keep WEP first, it may be removed below */
 868                 WLAN_CIPHER_SUITE_WEP40,
 869                 WLAN_CIPHER_SUITE_WEP104,
 870                 WLAN_CIPHER_SUITE_TKIP,
 871                 WLAN_CIPHER_SUITE_CCMP,
 872                 WLAN_CIPHER_SUITE_CCMP_256,
 873                 WLAN_CIPHER_SUITE_GCMP,
 874                 WLAN_CIPHER_SUITE_GCMP_256,
 875
 876                 /* keep last -- depends on hw flags! */
 877                 WLAN_CIPHER_SUITE_AES_CMAC,
 878                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 879                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 880                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 881         };
 882
 883         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 884             local->hw.wiphy->cipher_suites) {
 885                 /* If the driver advertises, or doesn't support SW crypto,
 886                  * we only need to remove WEP if necessary.
 887                  */
 888                 if (have_wep)
 889                         return 0;
 890
 891                 /* well if it has _no_ ciphers ... fine */
 892                 if (!local->hw.wiphy->n_cipher_suites)
 893                         return 0;
 894
 895                 /* Driver provides cipher suites, but we need to exclude WEP */
 896                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 897                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 898                                  GFP_KERNEL);
 899                 if (!suites)
 900                         return -ENOMEM;
 901
 902                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 903                         u32 suite = local->hw.wiphy->cipher_suites[r];
 904
 905                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 906                             suite == WLAN_CIPHER_SUITE_WEP104)
 907                                 continue;
 908                         suites[w++] = suite;
 909                 }
 910         } else {
 911                 /* assign the (software supported and perhaps offloaded)
 912                  * cipher suites
 913                  */
 914                 local->hw.wiphy->cipher_suites = cipher_suites;
 915                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 916
 917                 if (!have_mfp)
 918                         local->hw.wiphy->n_cipher_suites -= 4;
 919
 920                 if (!have_wep) {
 921                         local->hw.wiphy->cipher_suites += 2;
 922                         local->hw.wiphy->n_cipher_suites -= 2;
 923                 }
 924
 925                 /* not dynamically allocated, so just return */
 926                 return 0;
 927         }
 928
 929         local->hw.wiphy->cipher_suites = suites;
 930         local->hw.wiphy->n_cipher_suites = w;
 931         local->wiphy_ciphers_allocated = true;
 932
 933         return 0;
 934 }
 935
 936 int ieee80211_register_hw(struct ieee80211_hw *hw)
 937 {
 938         struct ieee80211_local *local = hw_to_local(hw);
 939         int result, i;
 940         enum nl80211_band band;
 941         int channels, max_bitrates;
 942         bool supp_ht, supp_vht, supp_he, supp_eht;
 943         struct cfg80211_chan_def dflt_chandef = {};
 944
 945         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 946             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 947              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 948                 return -EINVAL;
 949
 950         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 951             (!local->ops->tdls_channel_switch ||
 952              !local->ops->tdls_cancel_channel_switch ||
 953              !local->ops->tdls_recv_channel_switch))
 954                 return -EOPNOTSUPP;
 955
 956         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 957                     !local->ops->set_frag_threshold))
 958                 return -EINVAL;
 959
 960         if (WARN_ON(local->hw.wiphy->interface_modes &
 961                         BIT(NL80211_IFTYPE_NAN) &&
 962                     (!local->ops->start_nan || !local->ops->stop_nan)))
 963                 return -EINVAL;
 964
 965         if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
 966                 /*
 967                  * For drivers capable of doing MLO, assume modern driver
 968                  * or firmware facilities, so software doesn't have to do
 969                  * as much, e.g. monitoring beacons would be hard if we
 970                  * might not even know which link is active at which time.
 971                  */
 972                 if (WARN_ON(!local->use_chanctx))
 973                         return -EINVAL;
 974
 975                 if (WARN_ON(!local->ops->link_info_changed))
 976                         return -EINVAL;
 977
 978                 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
 979                         return -EINVAL;
 980
 981                 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
 982                         return -EINVAL;
 983
 984                 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
 985                         return -EINVAL;
 986
 987                 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
 988                             (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
 989                              ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
 990                         return -EINVAL;
 991
 992                 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
 993                         return -EINVAL;
 994
 995                 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
 996                         return -EINVAL;
 997
 998                 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
 999                         return -EINVAL;
1000
1001                 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1002                         return -EINVAL;
1003
1004                 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1005                         return -EINVAL;
1006
1007                 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1008                         return -EINVAL;
1009         }
1010
1011 #ifdef CONFIG_PM
1012         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1013                 return -EINVAL;
1014 #endif
1015
1016         if (!local->use_chanctx) {
1017                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1018                         const struct ieee80211_iface_combination *comb;
1019
1020                         comb = &local->hw.wiphy->iface_combinations[i];
1021
1022                         if (comb->num_different_channels > 1)
1023                                 return -EINVAL;
1024                 }
1025         } else {
1026                 /* DFS is not supported with multi-channel combinations yet */
1027                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1028                         const struct ieee80211_iface_combination *comb;
1029
1030                         comb = &local->hw.wiphy->iface_combinations[i];
1031
1032                         if (comb->radar_detect_widths &&
1033                             comb->num_different_channels > 1)
1034                                 return -EINVAL;
1035                 }
1036         }
1037
1038         /* Only HW csum features are currently compatible with mac80211 */
1039         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1040                 return -EINVAL;
1041
1042         if (hw->max_report_rates == 0)
1043                 hw->max_report_rates = hw->max_rates;
1044
1045         local->rx_chains = 1;
1046
1047         /*
1048          * generic code guarantees at least one band,
1049          * set this very early because much code assumes
1050          * that hw.conf.channel is assigned
1051          */
1052         channels = 0;
1053         max_bitrates = 0;
1054         supp_ht = false;
1055         supp_vht = false;
1056         supp_he = false;
1057         supp_eht = false;
1058         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1059                 struct ieee80211_supported_band *sband;
1060
1061                 sband = local->hw.wiphy->bands[band];
1062                 if (!sband)
1063                         continue;
1064
1065                 if (!dflt_chandef.chan) {
1066                         /*
1067                          * Assign the first enabled channel to dflt_chandef
1068                          * from the list of channels
1069                          */
1070                         for (i = 0; i < sband->n_channels; i++)
1071                                 if (!(sband->channels[i].flags &
1072                                                 IEEE80211_CHAN_DISABLED))
1073                                         break;
1074                         /* if none found then use the first anyway */
1075                         if (i == sband->n_channels)
1076                                 i = 0;
1077                         cfg80211_chandef_create(&dflt_chandef,
1078                                                 &sband->channels[i],
1079                                                 NL80211_CHAN_NO_HT);
1080                         /* init channel we're on */
1081                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
1082                                 local->hw.conf.chandef = dflt_chandef;
1083                                 local->_oper_chandef = dflt_chandef;
1084                         }
1085                         local->monitor_chandef = dflt_chandef;
1086                 }
1087
1088                 channels += sband->n_channels;
1089
1090                 if (max_bitrates < sband->n_bitrates)
1091                         max_bitrates = sband->n_bitrates;
1092                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1093                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1094
1095                 for (i = 0; i < sband->n_iftype_data; i++) {
1096                         const struct ieee80211_sband_iftype_data *iftd;
1097
1098                         iftd = &sband->iftype_data[i];
1099
1100                         supp_he = supp_he || iftd->he_cap.has_he;
1101                         supp_eht = supp_eht || iftd->eht_cap.has_eht;
1102                 }
1103
1104                 /* HT, VHT, HE require QoS, thus >= 4 queues */
1105                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1106                             (supp_ht || supp_vht || supp_he)))
1107                         return -EINVAL;
1108
1109                 /* EHT requires HE support */
1110                 if (WARN_ON(supp_eht && !supp_he))
1111                         return -EINVAL;
1112
1113                 if (!sband->ht_cap.ht_supported)
1114                         continue;
1115
1116                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1117                 local->rx_chains =
1118                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1119                             local->rx_chains);
1120
1121                 /* no need to mask, SM_PS_DISABLED has all bits set */
1122                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1123                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1124         }
1125
1126         /* if low-level driver supports AP, we also support VLAN.
1127          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1128          * based on their support to transmit SW encrypted packets.
1129          */
1130         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1131             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1132                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1133                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1134         }
1135
1136         /* mac80211 always supports monitor */
1137         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1138         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1139
1140         /* mac80211 doesn't support more than one IBSS interface right now */
1141         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1142                 const struct ieee80211_iface_combination *c;
1143                 int j;
1144
1145                 c = &hw->wiphy->iface_combinations[i];
1146
1147                 for (j = 0; j < c->n_limits; j++)
1148                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1149                             c->limits[j].max > 1)
1150                                 return -EINVAL;
1151         }
1152
1153         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1154                                       sizeof(void *) * channels, GFP_KERNEL);
1155         if (!local->int_scan_req)
1156                 return -ENOMEM;
1157
1158         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1159                 if (!local->hw.wiphy->bands[band])
1160                         continue;
1161                 local->int_scan_req->rates[band] = (u32) -1;
1162         }
1163
1164 #ifndef CONFIG_MAC80211_MESH
1165         /* mesh depends on Kconfig, but drivers should set it if they want */
1166         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1167 #endif
1168
1169         /* if the underlying driver supports mesh, mac80211 will (at least)
1170          * provide routing of mesh authentication frames to userspace */
1171         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1172                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1173
1174         /* mac80211 supports control port protocol changing */
1175         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1176
1177         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1178                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1179         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1180                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1181                 if (hw->max_signal <= 0) {
1182                         result = -EINVAL;
1183                         goto fail_workqueue;
1184                 }
1185         }
1186
1187         /* Mac80211 and therefore all drivers using SW crypto only
1188          * are able to handle PTK rekeys and Extended Key ID.
1189          */
1190         if (!local->ops->set_key) {
1191                 wiphy_ext_feature_set(local->hw.wiphy,
1192                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1193                 wiphy_ext_feature_set(local->hw.wiphy,
1194                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1195         }
1196
1197         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1198                 wiphy_ext_feature_set(local->hw.wiphy,
1199                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1200
1201         /*
1202          * Calculate scan IE length -- we need this to alloc
1203          * memory and to subtract from the driver limit. It
1204          * includes the DS Params, (extended) supported rates, and HT
1205          * information -- SSID is the driver's responsibility.
1206          */
1207         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1208                 3 /* DS Params */;
1209         if (supp_ht)
1210                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1211
1212         if (supp_vht)
1213                 local->scan_ies_len +=
1214                         2 + sizeof(struct ieee80211_vht_cap);
1215
1216         /*
1217          * HE cap element is variable in size - set len to allow max size */
1218         if (supp_he) {
1219                 local->scan_ies_len +=
1220                         3 + sizeof(struct ieee80211_he_cap_elem) +
1221                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1222                         IEEE80211_HE_PPE_THRES_MAX_LEN;
1223
1224                 if (supp_eht)
1225                         local->scan_ies_len +=
1226                                 3 + sizeof(struct ieee80211_eht_cap_elem) +
1227                                 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1228                                 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1229         }
1230
1231         if (!local->ops->hw_scan) {
1232                 /* For hw_scan, driver needs to set these up. */
1233                 local->hw.wiphy->max_scan_ssids = 4;
1234                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1235         }
1236
1237         /*
1238          * If the driver supports any scan IEs, then assume the
1239          * limit includes the IEs mac80211 will add, otherwise
1240          * leave it at zero and let the driver sort it out; we
1241          * still pass our IEs to the driver but userspace will
1242          * not be allowed to in that case.
1243          */
1244         if (local->hw.wiphy->max_scan_ie_len)
1245                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1246
1247         result = ieee80211_init_cipher_suites(local);
1248         if (result < 0)
1249                 goto fail_workqueue;
1250
1251         if (!local->ops->remain_on_channel)
1252                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1253
1254         /* mac80211 based drivers don't support internal TDLS setup */
1255         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1256                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1257
1258         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1259         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1260                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1261
1262         /* mac80211 supports multi BSSID, if the driver supports it */
1263         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1264                 local->hw.wiphy->support_mbssid = true;
1265                 if (ieee80211_hw_check(&local->hw,
1266                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1267                         local->hw.wiphy->support_only_he_mbssid = true;
1268                 else
1269                         local->ext_capa[2] |=
1270                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1271         }
1272
1273         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1274
1275         /*
1276          * We use the number of queues for feature tests (QoS, HT) internally
1277          * so restrict them appropriately.
1278          */
1279         if (hw->queues > IEEE80211_MAX_QUEUES)
1280                 hw->queues = IEEE80211_MAX_QUEUES;
1281
1282         local->workqueue =
1283                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1284         if (!local->workqueue) {
1285                 result = -ENOMEM;
1286                 goto fail_workqueue;
1287         }
1288
1289         /*
1290          * The hardware needs headroom for sending the frame,
1291          * and we need some headroom for passing the frame to monitor
1292          * interfaces, but never both at the same time.
1293          */
1294         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1295                                    IEEE80211_TX_STATUS_HEADROOM);
1296
1297         /*
1298          * if the driver doesn't specify a max listen interval we
1299          * use 5 which should be a safe default
1300          */
1301         if (local->hw.max_listen_interval == 0)
1302                 local->hw.max_listen_interval = 5;
1303
1304         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1305
1306         local->dynamic_ps_forced_timeout = -1;
1307
1308         if (!local->hw.max_nan_de_entries)
1309                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1310
1311         if (!local->hw.weight_multiplier)
1312                 local->hw.weight_multiplier = 1;
1313
1314         ieee80211_wep_init(local);
1315
1316         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1317
1318         ieee80211_led_init(local);
1319
1320         result = ieee80211_txq_setup_flows(local);
1321         if (result)
1322                 goto fail_flows;
1323
1324         rtnl_lock();
1325         result = ieee80211_init_rate_ctrl_alg(local,
1326                                               hw->rate_control_algorithm);
1327         rtnl_unlock();
1328         if (result < 0) {
1329                 wiphy_debug(local->hw.wiphy,
1330                             "Failed to initialize rate control algorithm\n");
1331                 goto fail_rate;
1332         }
1333
1334         if (local->rate_ctrl) {
1335                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1336                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1337                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1338         }
1339
1340         /*
1341          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1342          * or have it when we don't, copy the sband structure and set/clear it.
1343          * This is necessary because rate scaling algorithms could be switched
1344          * and have different support values.
1345          * Print a message so that in the common case the reallocation can be
1346          * avoided.
1347          */
1348         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1349         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1350                 struct ieee80211_supported_band *sband;
1351                 bool local_cap, ie_cap;
1352
1353                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1354
1355                 sband = local->hw.wiphy->bands[band];
1356                 if (!sband || !sband->vht_cap.vht_supported)
1357                         continue;
1358
1359                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1360                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1361
1362                 if (local_cap == ie_cap)
1363                         continue;
1364
1365                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1366                 if (!sband) {
1367                         result = -ENOMEM;
1368                         goto fail_rate;
1369                 }
1370
1371                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1372                           band);
1373
1374                 sband->vht_cap.vht_mcs.tx_highest ^=
1375                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1376
1377                 local->hw.wiphy->bands[band] = sband;
1378                 local->sband_allocated |= BIT(band);
1379         }
1380
1381         result = wiphy_register(local->hw.wiphy);
1382         if (result < 0)
1383                 goto fail_wiphy_register;
1384
1385         debugfs_hw_add(local);
1386         rate_control_add_debugfs(local);
1387
1388         rtnl_lock();
1389         wiphy_lock(hw->wiphy);
1390
1391         /* add one default STA interface if supported */
1392         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1393             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1394                 struct vif_params params = {0};
1395
1396                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1397                                           NL80211_IFTYPE_STATION, &params);
1398                 if (result)
1399                         wiphy_warn(local->hw.wiphy,
1400                                    "Failed to add default virtual iface\n");
1401         }
1402
1403         wiphy_unlock(hw->wiphy);
1404         rtnl_unlock();
1405
1406 #ifdef CONFIG_INET
1407         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1408         result = register_inetaddr_notifier(&local->ifa_notifier);
1409         if (result)
1410                 goto fail_ifa;
1411 #endif
1412
1413 #if IS_ENABLED(CONFIG_IPV6)
1414         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1415         result = register_inet6addr_notifier(&local->ifa6_notifier);
1416         if (result)
1417                 goto fail_ifa6;
1418 #endif
1419
1420         return 0;
1421
1422 #if IS_ENABLED(CONFIG_IPV6)
1423  fail_ifa6:
1424 #ifdef CONFIG_INET
1425         unregister_inetaddr_notifier(&local->ifa_notifier);
1426 #endif
1427 #endif
1428 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1429  fail_ifa:
1430 #endif
1431         wiphy_unregister(local->hw.wiphy);
1432  fail_wiphy_register:
1433         rtnl_lock();
1434         rate_control_deinitialize(local);
1435         ieee80211_remove_interfaces(local);
1436         rtnl_unlock();
1437  fail_rate:
1438  fail_flows:
1439         ieee80211_led_exit(local);
1440         destroy_workqueue(local->workqueue);
1441  fail_workqueue:
1442         if (local->wiphy_ciphers_allocated) {
1443                 kfree(local->hw.wiphy->cipher_suites);
1444                 local->wiphy_ciphers_allocated = false;
1445         }
1446         kfree(local->int_scan_req);
1447         return result;
1448 }
1449 EXPORT_SYMBOL(ieee80211_register_hw);
1450
1451 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1452 {
1453         struct ieee80211_local *local = hw_to_local(hw);
1454
1455         tasklet_kill(&local->tx_pending_tasklet);
1456         tasklet_kill(&local->tasklet);
1457
1458 #ifdef CONFIG_INET
1459         unregister_inetaddr_notifier(&local->ifa_notifier);
1460 #endif
1461 #if IS_ENABLED(CONFIG_IPV6)
1462         unregister_inet6addr_notifier(&local->ifa6_notifier);
1463 #endif
1464
1465         rtnl_lock();
1466
1467         /*
1468          * At this point, interface list manipulations are fine
1469          * because the driver cannot be handing us frames any
1470          * more and the tasklet is killed.
1471          */
1472         ieee80211_remove_interfaces(local);
1473
1474         rtnl_unlock();
1475
1476         cancel_delayed_work_sync(&local->roc_work);
1477         cancel_work_sync(&local->restart_work);
1478         cancel_work_sync(&local->reconfig_filter);
1479         flush_work(&local->sched_scan_stopped_work);
1480         flush_work(&local->radar_detected_work);
1481
1482         ieee80211_clear_tx_pending(local);
1483         rate_control_deinitialize(local);
1484
1485         if (skb_queue_len(&local->skb_queue) ||
1486             skb_queue_len(&local->skb_queue_unreliable))
1487                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1488         skb_queue_purge(&local->skb_queue);
1489         skb_queue_purge(&local->skb_queue_unreliable);
1490
1491         wiphy_unregister(local->hw.wiphy);
1492         destroy_workqueue(local->workqueue);
1493         ieee80211_led_exit(local);
1494         kfree(local->int_scan_req);
1495 }
1496 EXPORT_SYMBOL(ieee80211_unregister_hw);
1497
1498 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1499 {
1500         WARN_ONCE(1, "Have pending ack frames!\n");
1501         kfree_skb(p);
1502         return 0;
1503 }
1504
1505 void ieee80211_free_hw(struct ieee80211_hw *hw)
1506 {
1507         struct ieee80211_local *local = hw_to_local(hw);
1508         enum nl80211_band band;
1509
1510         mutex_destroy(&local->iflist_mtx);
1511         mutex_destroy(&local->mtx);
1512
1513         if (local->wiphy_ciphers_allocated) {
1514                 kfree(local->hw.wiphy->cipher_suites);
1515                 local->wiphy_ciphers_allocated = false;
1516         }
1517
1518         idr_for_each(&local->ack_status_frames,
1519                      ieee80211_free_ack_frame, NULL);
1520         idr_destroy(&local->ack_status_frames);
1521
1522         sta_info_stop(local);
1523
1524         ieee80211_free_led_names(local);
1525
1526         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1527                 if (!(local->sband_allocated & BIT(band)))
1528                         continue;
1529                 kfree(local->hw.wiphy->bands[band]);
1530         }
1531
1532         wiphy_free(local->hw.wiphy);
1533 }
1534 EXPORT_SYMBOL(ieee80211_free_hw);
1535
1536 static int __init ieee80211_init(void)
1537 {
1538         struct sk_buff *skb;
1539         int ret;
1540
1541         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1542         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1543                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1544
1545         ret = rc80211_minstrel_init();
1546         if (ret)
1547                 return ret;
1548
1549         ret = ieee80211_iface_init();
1550         if (ret)
1551                 goto err_netdev;
1552
1553         return 0;
1554  err_netdev:
1555         rc80211_minstrel_exit();
1556
1557         return ret;
1558 }
1559
1560 static void __exit ieee80211_exit(void)
1561 {
1562         rc80211_minstrel_exit();
1563
1564         ieee80211s_stop();
1565
1566         ieee80211_iface_exit();
1567
1568         rcu_barrier();
1569 }
1570
1571
1572 subsys_initcall(ieee80211_init);
1573 module_exit(ieee80211_exit);
1574
1575 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1576 MODULE_LICENSE("GPL");