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