net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright (C) 2017     Intel Deutschland GmbH
   7  * Copyright (C) 2018 Intel Corporation
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/types.h>
  19 #include <linux/slab.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/if_arp.h>
  23 #include <linux/rtnetlink.h>
  24 #include <linux/bitmap.h>
  25 #include <linux/inetdevice.h>
  26 #include <net/net_namespace.h>
  27 #include <net/cfg80211.h>
  28 #include <net/addrconf.h>
  29
  30 #include "ieee80211_i.h"
  31 #include "driver-ops.h"
  32 #include "rate.h"
  33 #include "mesh.h"
  34 #include "wep.h"
  35 #include "led.h"
  36 #include "debugfs.h"
  37
  38 void ieee80211_configure_filter(struct ieee80211_local *local)
  39 {
  40         u64 mc;
  41         unsigned int changed_flags;
  42         unsigned int new_flags = 0;
  43
  44         if (atomic_read(&local->iff_allmultis))
  45                 new_flags |= FIF_ALLMULTI;
  46
  47         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  48             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  49                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  50
  51         if (local->fif_probe_req || local->probe_req_reg)
  52                 new_flags |= FIF_PROBE_REQ;
  53
  54         if (local->fif_fcsfail)
  55                 new_flags |= FIF_FCSFAIL;
  56
  57         if (local->fif_plcpfail)
  58                 new_flags |= FIF_PLCPFAIL;
  59
  60         if (local->fif_control)
  61                 new_flags |= FIF_CONTROL;
  62
  63         if (local->fif_other_bss)
  64                 new_flags |= FIF_OTHER_BSS;
  65
  66         if (local->fif_pspoll)
  67                 new_flags |= FIF_PSPOLL;
  68
  69         spin_lock_bh(&local->filter_lock);
  70         changed_flags = local->filter_flags ^ new_flags;
  71
  72         mc = drv_prepare_multicast(local, &local->mc_list);
  73         spin_unlock_bh(&local->filter_lock);
  74
  75         /* be a bit nasty */
  76         new_flags |= (1<<31);
  77
  78         drv_configure_filter(local, changed_flags, &new_flags, mc);
  79
  80         WARN_ON(new_flags & (1<<31));
  81
  82         local->filter_flags = new_flags & ~(1<<31);
  83 }
  84
  85 static void ieee80211_reconfig_filter(struct work_struct *work)
  86 {
  87         struct ieee80211_local *local =
  88                 container_of(work, struct ieee80211_local, reconfig_filter);
  89
  90         ieee80211_configure_filter(local);
  91 }
  92
  93 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  94 {
  95         struct ieee80211_sub_if_data *sdata;
  96         struct cfg80211_chan_def chandef = {};
  97         u32 changed = 0;
  98         int power;
  99         u32 offchannel_flag;
 100
 101         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 102
 103         if (local->scan_chandef.chan) {
 104                 chandef = local->scan_chandef;
 105         } else if (local->tmp_channel) {
 106                 chandef.chan = local->tmp_channel;
 107                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 108                 chandef.center_freq1 = chandef.chan->center_freq;
 109         } else
 110                 chandef = local->_oper_chandef;
 111
 112         WARN(!cfg80211_chandef_valid(&chandef),
 113              "control:%d MHz width:%d center: %d/%d MHz",
 114              chandef.chan->center_freq, chandef.width,
 115              chandef.center_freq1, chandef.center_freq2);
 116
 117         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 118                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 119         else
 120                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 121
 122         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 123
 124         if (offchannel_flag ||
 125             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 126                                         &local->_oper_chandef)) {
 127                 local->hw.conf.chandef = chandef;
 128                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 129         }
 130
 131         if (!conf_is_ht(&local->hw.conf)) {
 132                 /*
 133                  * mac80211.h documents that this is only valid
 134                  * when the channel is set to an HT type, and
 135                  * that otherwise STATIC is used.
 136                  */
 137                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 138         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 139                 local->hw.conf.smps_mode = local->smps_mode;
 140                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 141         }
 142
 143         power = ieee80211_chandef_max_power(&chandef);
 144
 145         rcu_read_lock();
 146         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 147                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 148                         continue;
 149                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 150                         continue;
 151                 power = min(power, sdata->vif.bss_conf.txpower);
 152         }
 153         rcu_read_unlock();
 154
 155         if (local->hw.conf.power_level != power) {
 156                 changed |= IEEE80211_CONF_CHANGE_POWER;
 157                 local->hw.conf.power_level = power;
 158         }
 159
 160         return changed;
 161 }
 162
 163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 164 {
 165         int ret = 0;
 166
 167         might_sleep();
 168
 169         if (!local->use_chanctx)
 170                 changed |= ieee80211_hw_conf_chan(local);
 171         else
 172                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 173                              IEEE80211_CONF_CHANGE_POWER);
 174
 175         if (changed && local->open_count) {
 176                 ret = drv_config(local, changed);
 177                 /*
 178                  * Goal:
 179                  * HW reconfiguration should never fail, the driver has told
 180                  * us what it can support so it should live up to that promise.
 181                  *
 182                  * Current status:
 183                  * rfkill is not integrated with mac80211 and a
 184                  * configuration command can thus fail if hardware rfkill
 185                  * is enabled
 186                  *
 187                  * FIXME: integrate rfkill with mac80211 and then add this
 188                  * WARN_ON() back
 189                  *
 190                  */
 191                 /* WARN_ON(ret); */
 192         }
 193
 194         return ret;
 195 }
 196
 197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 198                                       u32 changed)
 199 {
 200         struct ieee80211_local *local = sdata->local;
 201
 202         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 203                 return;
 204
 205         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 206 }
 207
 208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 209 {
 210         sdata->vif.bss_conf.use_cts_prot = false;
 211         sdata->vif.bss_conf.use_short_preamble = false;
 212         sdata->vif.bss_conf.use_short_slot = false;
 213         return BSS_CHANGED_ERP_CTS_PROT |
 214                BSS_CHANGED_ERP_PREAMBLE |
 215                BSS_CHANGED_ERP_SLOT;
 216 }
 217
 218 static void ieee80211_tasklet_handler(unsigned long data)
 219 {
 220         struct ieee80211_local *local = (struct ieee80211_local *) data;
 221         struct sk_buff *skb;
 222
 223         while ((skb = skb_dequeue(&local->skb_queue)) ||
 224                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 225                 switch (skb->pkt_type) {
 226                 case IEEE80211_RX_MSG:
 227                         /* Clear skb->pkt_type in order to not confuse kernel
 228                          * netstack. */
 229                         skb->pkt_type = 0;
 230                         ieee80211_rx(&local->hw, skb);
 231                         break;
 232                 case IEEE80211_TX_STATUS_MSG:
 233                         skb->pkt_type = 0;
 234                         ieee80211_tx_status(&local->hw, skb);
 235                         break;
 236                 default:
 237                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 238                              skb->pkt_type);
 239                         dev_kfree_skb(skb);
 240                         break;
 241                 }
 242         }
 243 }
 244
 245 static void ieee80211_restart_work(struct work_struct *work)
 246 {
 247         struct ieee80211_local *local =
 248                 container_of(work, struct ieee80211_local, restart_work);
 249         struct ieee80211_sub_if_data *sdata;
 250
 251         /* wait for scan work complete */
 252         flush_workqueue(local->workqueue);
 253         flush_work(&local->sched_scan_stopped_work);
 254
 255         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 256              "%s called with hardware scan in progress\n", __func__);
 257
 258         flush_work(&local->radar_detected_work);
 259         rtnl_lock();
 260         list_for_each_entry(sdata, &local->interfaces, list) {
 261                 /*
 262                  * XXX: there may be more work for other vif types and even
 263                  * for station mode: a good thing would be to run most of
 264                  * the iface type's dependent _stop (ieee80211_mg_stop,
 265                  * ieee80211_ibss_stop) etc...
 266                  * For now, fix only the specific bug that was seen: race
 267                  * between csa_connection_drop_work and us.
 268                  */
 269                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 270                         /*
 271                          * This worker is scheduled from the iface worker that
 272                          * runs on mac80211's workqueue, so we can't be
 273                          * scheduling this worker after the cancel right here.
 274                          * The exception is ieee80211_chswitch_done.
 275                          * Then we can have a race...
 276                          */
 277                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 278                 }
 279                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 280         }
 281         ieee80211_scan_cancel(local);
 282
 283         /* make sure any new ROC will consider local->in_reconfig */
 284         flush_delayed_work(&local->roc_work);
 285         flush_work(&local->hw_roc_done);
 286
 287         /* wait for all packet processing to be done */
 288         synchronize_net();
 289
 290         ieee80211_reconfig(local);
 291         rtnl_unlock();
 292 }
 293
 294 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 295 {
 296         struct ieee80211_local *local = hw_to_local(hw);
 297
 298         trace_api_restart_hw(local);
 299
 300         wiphy_info(hw->wiphy,
 301                    "Hardware restart was requested\n");
 302
 303         /* use this reason, ieee80211_reconfig will unblock it */
 304         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 305                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 306                                         false);
 307
 308         /*
 309          * Stop all Rx during the reconfig. We don't want state changes
 310          * or driver callbacks while this is in progress.
 311          */
 312         local->in_reconfig = true;
 313         barrier();
 314
 315         queue_work(system_freezable_wq, &local->restart_work);
 316 }
 317 EXPORT_SYMBOL(ieee80211_restart_hw);
 318
 319 #ifdef CONFIG_INET
 320 static int ieee80211_ifa_changed(struct notifier_block *nb,
 321                                  unsigned long data, void *arg)
 322 {
 323         struct in_ifaddr *ifa = arg;
 324         struct ieee80211_local *local =
 325                 container_of(nb, struct ieee80211_local,
 326                              ifa_notifier);
 327         struct net_device *ndev = ifa->ifa_dev->dev;
 328         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 329         struct in_device *idev;
 330         struct ieee80211_sub_if_data *sdata;
 331         struct ieee80211_bss_conf *bss_conf;
 332         struct ieee80211_if_managed *ifmgd;
 333         int c = 0;
 334
 335         /* Make sure it's our interface that got changed */
 336         if (!wdev)
 337                 return NOTIFY_DONE;
 338
 339         if (wdev->wiphy != local->hw.wiphy)
 340                 return NOTIFY_DONE;
 341
 342         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 343         bss_conf = &sdata->vif.bss_conf;
 344
 345         /* ARP filtering is only supported in managed mode */
 346         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 347                 return NOTIFY_DONE;
 348
 349         idev = __in_dev_get_rtnl(sdata->dev);
 350         if (!idev)
 351                 return NOTIFY_DONE;
 352
 353         ifmgd = &sdata->u.mgd;
 354         sdata_lock(sdata);
 355
 356         /* Copy the addresses to the bss_conf list */
 357         ifa = idev->ifa_list;
 358         while (ifa) {
 359                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 360                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 361                 ifa = ifa->ifa_next;
 362                 c++;
 363         }
 364
 365         bss_conf->arp_addr_cnt = c;
 366
 367         /* Configure driver only if associated (which also implies it is up) */
 368         if (ifmgd->associated)
 369                 ieee80211_bss_info_change_notify(sdata,
 370                                                  BSS_CHANGED_ARP_FILTER);
 371
 372         sdata_unlock(sdata);
 373
 374         return NOTIFY_OK;
 375 }
 376 #endif
 377
 378 #if IS_ENABLED(CONFIG_IPV6)
 379 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 380                                   unsigned long data, void *arg)
 381 {
 382         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 383         struct inet6_dev *idev = ifa->idev;
 384         struct net_device *ndev = ifa->idev->dev;
 385         struct ieee80211_local *local =
 386                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 387         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 388         struct ieee80211_sub_if_data *sdata;
 389
 390         /* Make sure it's our interface that got changed */
 391         if (!wdev || wdev->wiphy != local->hw.wiphy)
 392                 return NOTIFY_DONE;
 393
 394         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 395
 396         /*
 397          * For now only support station mode. This is mostly because
 398          * doing AP would have to handle AP_VLAN in some way ...
 399          */
 400         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 401                 return NOTIFY_DONE;
 402
 403         drv_ipv6_addr_change(local, sdata, idev);
 404
 405         return NOTIFY_OK;
 406 }
 407 #endif
 408
 409 /* There isn't a lot of sense in it, but you can transmit anything you like */
 410 static const struct ieee80211_txrx_stypes
 411 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 412         [NL80211_IFTYPE_ADHOC] = {
 413                 .tx = 0xffff,
 414                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 415                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 416                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 417                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 418         },
 419         [NL80211_IFTYPE_STATION] = {
 420                 .tx = 0xffff,
 421                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 422                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 423         },
 424         [NL80211_IFTYPE_AP] = {
 425                 .tx = 0xffff,
 426                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 427                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 428                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 429                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 430                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 431                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 432                         BIT(IEEE80211_STYPE_ACTION >> 4),
 433         },
 434         [NL80211_IFTYPE_AP_VLAN] = {
 435                 /* copy AP */
 436                 .tx = 0xffff,
 437                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 438                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 439                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 440                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 441                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 442                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 443                         BIT(IEEE80211_STYPE_ACTION >> 4),
 444         },
 445         [NL80211_IFTYPE_P2P_CLIENT] = {
 446                 .tx = 0xffff,
 447                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 448                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 449         },
 450         [NL80211_IFTYPE_P2P_GO] = {
 451                 .tx = 0xffff,
 452                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 453                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 454                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 455                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 456                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 457                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 458                         BIT(IEEE80211_STYPE_ACTION >> 4),
 459         },
 460         [NL80211_IFTYPE_MESH_POINT] = {
 461                 .tx = 0xffff,
 462                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 463                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 464                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 465         },
 466         [NL80211_IFTYPE_P2P_DEVICE] = {
 467                 .tx = 0xffff,
 468                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 469                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 470         },
 471 };
 472
 473 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 474         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 475                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 476
 477         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 478                                 IEEE80211_HT_CAP_MAX_AMSDU |
 479                                 IEEE80211_HT_CAP_SGI_20 |
 480                                 IEEE80211_HT_CAP_SGI_40 |
 481                                 IEEE80211_HT_CAP_LDPC_CODING |
 482                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 483         .mcs = {
 484                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 485                              0xff, 0xff, 0xff, 0xff, 0xff, },
 486         },
 487 };
 488
 489 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 490         .vht_cap_info =
 491                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 492                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 493                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 494                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 495                             IEEE80211_VHT_CAP_TXSTBC |
 496                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 497                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 498                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 499                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 500                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 501         .supp_mcs = {
 502                 .rx_mcs_map = cpu_to_le16(~0),
 503                 .tx_mcs_map = cpu_to_le16(~0),
 504         },
 505 };
 506
 507 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 508                                            const struct ieee80211_ops *ops,
 509                                            const char *requested_name)
 510 {
 511         struct ieee80211_local *local;
 512         int priv_size, i;
 513         struct wiphy *wiphy;
 514         bool use_chanctx;
 515
 516         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 517                     !ops->add_interface || !ops->remove_interface ||
 518                     !ops->configure_filter))
 519                 return NULL;
 520
 521         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 522                 return NULL;
 523
 524         /* check all or no channel context operations exist */
 525         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 526             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 527             !!ops->unassign_vif_chanctx;
 528         if (WARN_ON(i != 0 && i != 5))
 529                 return NULL;
 530         use_chanctx = i == 5;
 531
 532         /* Ensure 32-byte alignment of our private data and hw private data.
 533          * We use the wiphy priv data for both our ieee80211_local and for
 534          * the driver's private data
 535          *
 536          * In memory it'll be like this:
 537          *
 538          * +-------------------------+
 539          * | struct wiphy           |
 540          * +-------------------------+
 541          * | struct ieee80211_local  |
 542          * +-------------------------+
 543          * | driver's private data   |
 544          * +-------------------------+
 545          *
 546          */
 547         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 548
 549         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 550
 551         if (!wiphy)
 552                 return NULL;
 553
 554         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 555
 556         wiphy->privid = mac80211_wiphy_privid;
 557
 558         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 559                         WIPHY_FLAG_4ADDR_AP |
 560                         WIPHY_FLAG_4ADDR_STATION |
 561                         WIPHY_FLAG_REPORTS_OBSS |
 562                         WIPHY_FLAG_OFFCHAN_TX;
 563
 564         if (ops->remain_on_channel)
 565                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 566
 567         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 568                            NL80211_FEATURE_SAE |
 569                            NL80211_FEATURE_HT_IBSS |
 570                            NL80211_FEATURE_VIF_TXPOWER |
 571                            NL80211_FEATURE_MAC_ON_CREATE |
 572                            NL80211_FEATURE_USERSPACE_MPM |
 573                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 574         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 575         wiphy_ext_feature_set(wiphy,
 576                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 577
 578         if (!ops->hw_scan) {
 579                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 580                                    NL80211_FEATURE_AP_SCAN;
 581                 /*
 582                  * if the driver behaves correctly using the probe request
 583                  * (template) from mac80211, then both of these should be
 584                  * supported even with hw scan - but let drivers opt in.
 585                  */
 586                 wiphy_ext_feature_set(wiphy,
 587                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 588                 wiphy_ext_feature_set(wiphy,
 589                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 590         }
 591
 592         if (!ops->set_key)
 593                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 594
 595         if (ops->wake_tx_queue)
 596                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 597
 598         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 599
 600         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 601
 602         local = wiphy_priv(wiphy);
 603
 604         if (sta_info_init(local))
 605                 goto err_free;
 606
 607         local->hw.wiphy = wiphy;
 608
 609         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 610
 611         local->ops = ops;
 612         local->use_chanctx = use_chanctx;
 613
 614         /*
 615          * We need a bit of data queued to build aggregates properly, so
 616          * instruct the TCP stack to allow more than a single ms of data
 617          * to be queued in the stack. The value is a bit-shift of 1
 618          * second, so 8 is ~4ms of queued data. Only affects local TCP
 619          * sockets.
 620          * This is the default, anyhow - drivers may need to override it
 621          * for local reasons (longer buffers, longer completion time, or
 622          * similar).
 623          */
 624         local->hw.tx_sk_pacing_shift = 8;
 625
 626         /* set up some defaults */
 627         local->hw.queues = 1;
 628         local->hw.max_rates = 1;
 629         local->hw.max_report_rates = 0;
 630         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 631         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 632         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 633         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 634         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 635         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 636                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 637                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 638         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 639                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 640         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 641         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 642         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 643         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 644         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 645
 646         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 647
 648         wiphy->extended_capabilities = local->ext_capa;
 649         wiphy->extended_capabilities_mask = local->ext_capa;
 650         wiphy->extended_capabilities_len =
 651                 ARRAY_SIZE(local->ext_capa);
 652
 653         INIT_LIST_HEAD(&local->interfaces);
 654         INIT_LIST_HEAD(&local->mon_list);
 655
 656         __hw_addr_init(&local->mc_list);
 657
 658         mutex_init(&local->iflist_mtx);
 659         mutex_init(&local->mtx);
 660
 661         mutex_init(&local->key_mtx);
 662         spin_lock_init(&local->filter_lock);
 663         spin_lock_init(&local->rx_path_lock);
 664         spin_lock_init(&local->queue_stop_reason_lock);
 665
 666         INIT_LIST_HEAD(&local->chanctx_list);
 667         mutex_init(&local->chanctx_mtx);
 668
 669         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 670
 671         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 672
 673         INIT_WORK(&local->radar_detected_work,
 674                   ieee80211_dfs_radar_detected_work);
 675
 676         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 677         local->smps_mode = IEEE80211_SMPS_OFF;
 678
 679         INIT_WORK(&local->dynamic_ps_enable_work,
 680                   ieee80211_dynamic_ps_enable_work);
 681         INIT_WORK(&local->dynamic_ps_disable_work,
 682                   ieee80211_dynamic_ps_disable_work);
 683         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 684
 685         INIT_WORK(&local->sched_scan_stopped_work,
 686                   ieee80211_sched_scan_stopped_work);
 687
 688         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 689
 690         spin_lock_init(&local->ack_status_lock);
 691         idr_init(&local->ack_status_frames);
 692
 693         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 694                 skb_queue_head_init(&local->pending[i]);
 695                 atomic_set(&local->agg_queue_stop[i], 0);
 696         }
 697         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 698                      (unsigned long)local);
 699
 700         if (ops->wake_tx_queue)
 701                 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
 702                              (unsigned long)local);
 703
 704         tasklet_init(&local->tasklet,
 705                      ieee80211_tasklet_handler,
 706                      (unsigned long) local);
 707
 708         skb_queue_head_init(&local->skb_queue);
 709         skb_queue_head_init(&local->skb_queue_unreliable);
 710         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 711
 712         ieee80211_alloc_led_names(local);
 713
 714         ieee80211_roc_setup(local);
 715
 716         local->hw.radiotap_timestamp.units_pos = -1;
 717         local->hw.radiotap_timestamp.accuracy = -1;
 718
 719         return &local->hw;
 720  err_free:
 721         wiphy_free(wiphy);
 722         return NULL;
 723 }
 724 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 725
 726 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 727 {
 728         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 729                           IS_ERR(local->wep_rx_tfm));
 730         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 731         int n_suites = 0, r = 0, w = 0;
 732         u32 *suites;
 733         static const u32 cipher_suites[] = {
 734                 /* keep WEP first, it may be removed below */
 735                 WLAN_CIPHER_SUITE_WEP40,
 736                 WLAN_CIPHER_SUITE_WEP104,
 737                 WLAN_CIPHER_SUITE_TKIP,
 738                 WLAN_CIPHER_SUITE_CCMP,
 739                 WLAN_CIPHER_SUITE_CCMP_256,
 740                 WLAN_CIPHER_SUITE_GCMP,
 741                 WLAN_CIPHER_SUITE_GCMP_256,
 742
 743                 /* keep last -- depends on hw flags! */
 744                 WLAN_CIPHER_SUITE_AES_CMAC,
 745                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 746                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 747                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 748         };
 749
 750         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 751             local->hw.wiphy->cipher_suites) {
 752                 /* If the driver advertises, or doesn't support SW crypto,
 753                  * we only need to remove WEP if necessary.
 754                  */
 755                 if (have_wep)
 756                         return 0;
 757
 758                 /* well if it has _no_ ciphers ... fine */
 759                 if (!local->hw.wiphy->n_cipher_suites)
 760                         return 0;
 761
 762                 /* Driver provides cipher suites, but we need to exclude WEP */
 763                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 764                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 765                                  GFP_KERNEL);
 766                 if (!suites)
 767                         return -ENOMEM;
 768
 769                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 770                         u32 suite = local->hw.wiphy->cipher_suites[r];
 771
 772                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 773                             suite == WLAN_CIPHER_SUITE_WEP104)
 774                                 continue;
 775                         suites[w++] = suite;
 776                 }
 777         } else if (!local->hw.cipher_schemes) {
 778                 /* If the driver doesn't have cipher schemes, there's nothing
 779                  * else to do other than assign the (software supported and
 780                  * perhaps offloaded) cipher suites.
 781                  */
 782                 local->hw.wiphy->cipher_suites = cipher_suites;
 783                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 784
 785                 if (!have_mfp)
 786                         local->hw.wiphy->n_cipher_suites -= 4;
 787
 788                 if (!have_wep) {
 789                         local->hw.wiphy->cipher_suites += 2;
 790                         local->hw.wiphy->n_cipher_suites -= 2;
 791                 }
 792
 793                 /* not dynamically allocated, so just return */
 794                 return 0;
 795         } else {
 796                 const struct ieee80211_cipher_scheme *cs;
 797
 798                 cs = local->hw.cipher_schemes;
 799
 800                 /* Driver specifies cipher schemes only (but not cipher suites
 801                  * including the schemes)
 802                  *
 803                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 804                  * CCMP-256, GCMP, and GCMP-256
 805                  */
 806                 n_suites = local->hw.n_cipher_schemes + 5;
 807
 808                 /* check if we have WEP40 and WEP104 */
 809                 if (have_wep)
 810                         n_suites += 2;
 811
 812                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 813                  * BIP-GMAC-256
 814                  */
 815                 if (have_mfp)
 816                         n_suites += 4;
 817
 818                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
 819                 if (!suites)
 820                         return -ENOMEM;
 821
 822                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 823                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 824                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 825                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 826                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 827
 828                 if (have_wep) {
 829                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 830                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 831                 }
 832
 833                 if (have_mfp) {
 834                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 835                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 836                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 837                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 838                 }
 839
 840                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 841                         suites[w++] = cs[r].cipher;
 842                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 843                                 kfree(suites);
 844                                 return -EINVAL;
 845                         }
 846                 }
 847         }
 848
 849         local->hw.wiphy->cipher_suites = suites;
 850         local->hw.wiphy->n_cipher_suites = w;
 851         local->wiphy_ciphers_allocated = true;
 852
 853         return 0;
 854 }
 855
 856 int ieee80211_register_hw(struct ieee80211_hw *hw)
 857 {
 858         struct ieee80211_local *local = hw_to_local(hw);
 859         int result, i;
 860         enum nl80211_band band;
 861         int channels, max_bitrates;
 862         bool supp_ht, supp_vht, supp_he;
 863         netdev_features_t feature_whitelist;
 864         struct cfg80211_chan_def dflt_chandef = {};
 865
 866         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 867             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 868              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 869                 return -EINVAL;
 870
 871         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 872             (!local->ops->tdls_channel_switch ||
 873              !local->ops->tdls_cancel_channel_switch ||
 874              !local->ops->tdls_recv_channel_switch))
 875                 return -EOPNOTSUPP;
 876
 877         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 878                     !local->ops->set_frag_threshold))
 879                 return -EINVAL;
 880
 881         if (WARN_ON(local->hw.wiphy->interface_modes &
 882                         BIT(NL80211_IFTYPE_NAN) &&
 883                     (!local->ops->start_nan || !local->ops->stop_nan)))
 884                 return -EINVAL;
 885
 886 #ifdef CONFIG_PM
 887         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 888                 return -EINVAL;
 889 #endif
 890
 891         if (!local->use_chanctx) {
 892                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 893                         const struct ieee80211_iface_combination *comb;
 894
 895                         comb = &local->hw.wiphy->iface_combinations[i];
 896
 897                         if (comb->num_different_channels > 1)
 898                                 return -EINVAL;
 899                 }
 900         } else {
 901                 /*
 902                  * WDS is currently prohibited when channel contexts are used
 903                  * because there's no clear definition of which channel WDS
 904                  * type interfaces use
 905                  */
 906                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 907                         return -EINVAL;
 908
 909                 /* DFS is not supported with multi-channel combinations yet */
 910                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 911                         const struct ieee80211_iface_combination *comb;
 912
 913                         comb = &local->hw.wiphy->iface_combinations[i];
 914
 915                         if (comb->radar_detect_widths &&
 916                             comb->num_different_channels > 1)
 917                                 return -EINVAL;
 918                 }
 919         }
 920
 921         /* Only HW csum features are currently compatible with mac80211 */
 922         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 923                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 924                             NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
 925         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 926                 return -EINVAL;
 927
 928         if (hw->max_report_rates == 0)
 929                 hw->max_report_rates = hw->max_rates;
 930
 931         local->rx_chains = 1;
 932
 933         /*
 934          * generic code guarantees at least one band,
 935          * set this very early because much code assumes
 936          * that hw.conf.channel is assigned
 937          */
 938         channels = 0;
 939         max_bitrates = 0;
 940         supp_ht = false;
 941         supp_vht = false;
 942         supp_he = false;
 943         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 944                 struct ieee80211_supported_band *sband;
 945
 946                 sband = local->hw.wiphy->bands[band];
 947                 if (!sband)
 948                         continue;
 949
 950                 if (!dflt_chandef.chan) {
 951                         cfg80211_chandef_create(&dflt_chandef,
 952                                                 &sband->channels[0],
 953                                                 NL80211_CHAN_NO_HT);
 954                         /* init channel we're on */
 955                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 956                                 local->hw.conf.chandef = dflt_chandef;
 957                                 local->_oper_chandef = dflt_chandef;
 958                         }
 959                         local->monitor_chandef = dflt_chandef;
 960                 }
 961
 962                 channels += sband->n_channels;
 963
 964                 if (max_bitrates < sband->n_bitrates)
 965                         max_bitrates = sband->n_bitrates;
 966                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 967                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 968
 969                 if (!supp_he)
 970                         supp_he = !!ieee80211_get_he_sta_cap(sband);
 971
 972                 if (!sband->ht_cap.ht_supported)
 973                         continue;
 974
 975                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 976                 local->rx_chains =
 977                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 978                             local->rx_chains);
 979
 980                 /* no need to mask, SM_PS_DISABLED has all bits set */
 981                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 982                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
 983         }
 984
 985         /* if low-level driver supports AP, we also support VLAN.
 986          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
 987          * based on their support to transmit SW encrypted packets.
 988          */
 989         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
 990             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
 991                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 992                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 993         }
 994
 995         /* mac80211 always supports monitor */
 996         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 997         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 998
 999         /* mac80211 doesn't support more than one IBSS interface right now */
1000         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1001                 const struct ieee80211_iface_combination *c;
1002                 int j;
1003
1004                 c = &hw->wiphy->iface_combinations[i];
1005
1006                 for (j = 0; j < c->n_limits; j++)
1007                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1008                             c->limits[j].max > 1)
1009                                 return -EINVAL;
1010         }
1011
1012         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1013                                       sizeof(void *) * channels, GFP_KERNEL);
1014         if (!local->int_scan_req)
1015                 return -ENOMEM;
1016
1017         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1018                 if (!local->hw.wiphy->bands[band])
1019                         continue;
1020                 local->int_scan_req->rates[band] = (u32) -1;
1021         }
1022
1023 #ifndef CONFIG_MAC80211_MESH
1024         /* mesh depends on Kconfig, but drivers should set it if they want */
1025         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1026 #endif
1027
1028         /* if the underlying driver supports mesh, mac80211 will (at least)
1029          * provide routing of mesh authentication frames to userspace */
1030         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1031                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1032
1033         /* mac80211 supports control port protocol changing */
1034         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1035
1036         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1037                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1038         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1039                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1040                 if (hw->max_signal <= 0) {
1041                         result = -EINVAL;
1042                         goto fail_wiphy_register;
1043                 }
1044         }
1045
1046         /*
1047          * Calculate scan IE length -- we need this to alloc
1048          * memory and to subtract from the driver limit. It
1049          * includes the DS Params, (extended) supported rates, and HT
1050          * information -- SSID is the driver's responsibility.
1051          */
1052         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1053                 3 /* DS Params */;
1054         if (supp_ht)
1055                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1056
1057         if (supp_vht)
1058                 local->scan_ies_len +=
1059                         2 + sizeof(struct ieee80211_vht_cap);
1060
1061         /* HE cap element is variable in size - set len to allow max size */
1062         /*
1063          * TODO: 1 is added at the end of the calculation to accommodate for
1064          *      the temporary placing of the HE capabilities IE under EXT.
1065          *      Remove it once it is placed in the final place.
1066          */
1067         if (supp_he)
1068                 local->scan_ies_len +=
1069                         2 + sizeof(struct ieee80211_he_cap_elem) +
1070                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1071                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1072
1073         if (!local->ops->hw_scan) {
1074                 /* For hw_scan, driver needs to set these up. */
1075                 local->hw.wiphy->max_scan_ssids = 4;
1076                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1077         }
1078
1079         /*
1080          * If the driver supports any scan IEs, then assume the
1081          * limit includes the IEs mac80211 will add, otherwise
1082          * leave it at zero and let the driver sort it out; we
1083          * still pass our IEs to the driver but userspace will
1084          * not be allowed to in that case.
1085          */
1086         if (local->hw.wiphy->max_scan_ie_len)
1087                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1088
1089         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1090                                          local->hw.n_cipher_schemes));
1091
1092         result = ieee80211_init_cipher_suites(local);
1093         if (result < 0)
1094                 goto fail_wiphy_register;
1095
1096         if (!local->ops->remain_on_channel)
1097                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1098
1099         /* mac80211 based drivers don't support internal TDLS setup */
1100         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1101                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1102
1103         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1104         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1105                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1106
1107         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1108
1109         result = wiphy_register(local->hw.wiphy);
1110         if (result < 0)
1111                 goto fail_wiphy_register;
1112
1113         /*
1114          * We use the number of queues for feature tests (QoS, HT) internally
1115          * so restrict them appropriately.
1116          */
1117         if (hw->queues > IEEE80211_MAX_QUEUES)
1118                 hw->queues = IEEE80211_MAX_QUEUES;
1119
1120         local->workqueue =
1121                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1122         if (!local->workqueue) {
1123                 result = -ENOMEM;
1124                 goto fail_workqueue;
1125         }
1126
1127         /*
1128          * The hardware needs headroom for sending the frame,
1129          * and we need some headroom for passing the frame to monitor
1130          * interfaces, but never both at the same time.
1131          */
1132         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1133                                    IEEE80211_TX_STATUS_HEADROOM);
1134
1135         debugfs_hw_add(local);
1136
1137         /*
1138          * if the driver doesn't specify a max listen interval we
1139          * use 5 which should be a safe default
1140          */
1141         if (local->hw.max_listen_interval == 0)
1142                 local->hw.max_listen_interval = 5;
1143
1144         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1145
1146         local->dynamic_ps_forced_timeout = -1;
1147
1148         if (!local->hw.max_nan_de_entries)
1149                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1150
1151         result = ieee80211_wep_init(local);
1152         if (result < 0)
1153                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1154                             result);
1155
1156         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1157
1158         ieee80211_led_init(local);
1159
1160         result = ieee80211_txq_setup_flows(local);
1161         if (result)
1162                 goto fail_flows;
1163
1164         rtnl_lock();
1165
1166         result = ieee80211_init_rate_ctrl_alg(local,
1167                                               hw->rate_control_algorithm);
1168         if (result < 0) {
1169                 wiphy_debug(local->hw.wiphy,
1170                             "Failed to initialize rate control algorithm\n");
1171                 goto fail_rate;
1172         }
1173
1174         if (local->rate_ctrl) {
1175                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1176                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1177                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1178         }
1179
1180         /*
1181          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1182          * or have it when we don't, copy the sband structure and set/clear it.
1183          * This is necessary because rate scaling algorithms could be switched
1184          * and have different support values.
1185          * Print a message so that in the common case the reallocation can be
1186          * avoided.
1187          */
1188         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1189         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1190                 struct ieee80211_supported_band *sband;
1191                 bool local_cap, ie_cap;
1192
1193                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1194
1195                 sband = local->hw.wiphy->bands[band];
1196                 if (!sband || !sband->vht_cap.vht_supported)
1197                         continue;
1198
1199                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1200                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1201
1202                 if (local_cap == ie_cap)
1203                         continue;
1204
1205                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1206                 if (!sband) {
1207                         result = -ENOMEM;
1208                         goto fail_rate;
1209                 }
1210
1211                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1212                           band);
1213
1214                 sband->vht_cap.vht_mcs.tx_highest ^=
1215                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1216
1217                 local->hw.wiphy->bands[band] = sband;
1218                 local->sband_allocated |= BIT(band);
1219         }
1220
1221         /* add one default STA interface if supported */
1222         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1223             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1224                 struct vif_params params = {0};
1225
1226                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1227                                           NL80211_IFTYPE_STATION, &params);
1228                 if (result)
1229                         wiphy_warn(local->hw.wiphy,
1230                                    "Failed to add default virtual iface\n");
1231         }
1232
1233         rtnl_unlock();
1234
1235 #ifdef CONFIG_INET
1236         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1237         result = register_inetaddr_notifier(&local->ifa_notifier);
1238         if (result)
1239                 goto fail_ifa;
1240 #endif
1241
1242 #if IS_ENABLED(CONFIG_IPV6)
1243         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1244         result = register_inet6addr_notifier(&local->ifa6_notifier);
1245         if (result)
1246                 goto fail_ifa6;
1247 #endif
1248
1249         return 0;
1250
1251 #if IS_ENABLED(CONFIG_IPV6)
1252  fail_ifa6:
1253 #ifdef CONFIG_INET
1254         unregister_inetaddr_notifier(&local->ifa_notifier);
1255 #endif
1256 #endif
1257 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1258  fail_ifa:
1259 #endif
1260         rtnl_lock();
1261         rate_control_deinitialize(local);
1262         ieee80211_remove_interfaces(local);
1263  fail_rate:
1264         rtnl_unlock();
1265         ieee80211_led_exit(local);
1266         ieee80211_wep_free(local);
1267  fail_flows:
1268         destroy_workqueue(local->workqueue);
1269  fail_workqueue:
1270         wiphy_unregister(local->hw.wiphy);
1271  fail_wiphy_register:
1272         if (local->wiphy_ciphers_allocated)
1273                 kfree(local->hw.wiphy->cipher_suites);
1274         kfree(local->int_scan_req);
1275         return result;
1276 }
1277 EXPORT_SYMBOL(ieee80211_register_hw);
1278
1279 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1280 {
1281         struct ieee80211_local *local = hw_to_local(hw);
1282
1283         tasklet_kill(&local->tx_pending_tasklet);
1284         tasklet_kill(&local->tasklet);
1285
1286 #ifdef CONFIG_INET
1287         unregister_inetaddr_notifier(&local->ifa_notifier);
1288 #endif
1289 #if IS_ENABLED(CONFIG_IPV6)
1290         unregister_inet6addr_notifier(&local->ifa6_notifier);
1291 #endif
1292
1293         rtnl_lock();
1294
1295         /*
1296          * At this point, interface list manipulations are fine
1297          * because the driver cannot be handing us frames any
1298          * more and the tasklet is killed.
1299          */
1300         ieee80211_remove_interfaces(local);
1301
1302         rtnl_unlock();
1303
1304         cancel_delayed_work_sync(&local->roc_work);
1305         cancel_work_sync(&local->restart_work);
1306         cancel_work_sync(&local->reconfig_filter);
1307         cancel_work_sync(&local->tdls_chsw_work);
1308         flush_work(&local->sched_scan_stopped_work);
1309         flush_work(&local->radar_detected_work);
1310
1311         ieee80211_clear_tx_pending(local);
1312         rate_control_deinitialize(local);
1313
1314         if (skb_queue_len(&local->skb_queue) ||
1315             skb_queue_len(&local->skb_queue_unreliable))
1316                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1317         skb_queue_purge(&local->skb_queue);
1318         skb_queue_purge(&local->skb_queue_unreliable);
1319         skb_queue_purge(&local->skb_queue_tdls_chsw);
1320
1321         destroy_workqueue(local->workqueue);
1322         wiphy_unregister(local->hw.wiphy);
1323         ieee80211_wep_free(local);
1324         ieee80211_led_exit(local);
1325         kfree(local->int_scan_req);
1326 }
1327 EXPORT_SYMBOL(ieee80211_unregister_hw);
1328
1329 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1330 {
1331         WARN_ONCE(1, "Have pending ack frames!\n");
1332         kfree_skb(p);
1333         return 0;
1334 }
1335
1336 void ieee80211_free_hw(struct ieee80211_hw *hw)
1337 {
1338         struct ieee80211_local *local = hw_to_local(hw);
1339         enum nl80211_band band;
1340
1341         mutex_destroy(&local->iflist_mtx);
1342         mutex_destroy(&local->mtx);
1343
1344         if (local->wiphy_ciphers_allocated)
1345                 kfree(local->hw.wiphy->cipher_suites);
1346
1347         idr_for_each(&local->ack_status_frames,
1348                      ieee80211_free_ack_frame, NULL);
1349         idr_destroy(&local->ack_status_frames);
1350
1351         sta_info_stop(local);
1352
1353         ieee80211_free_led_names(local);
1354
1355         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1356                 if (!(local->sband_allocated & BIT(band)))
1357                         continue;
1358                 kfree(local->hw.wiphy->bands[band]);
1359         }
1360
1361         wiphy_free(local->hw.wiphy);
1362 }
1363 EXPORT_SYMBOL(ieee80211_free_hw);
1364
1365 static int __init ieee80211_init(void)
1366 {
1367         struct sk_buff *skb;
1368         int ret;
1369
1370         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1371         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1372                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1373
1374         ret = rc80211_minstrel_init();
1375         if (ret)
1376                 return ret;
1377
1378         ret = ieee80211_iface_init();
1379         if (ret)
1380                 goto err_netdev;
1381
1382         return 0;
1383  err_netdev:
1384         rc80211_minstrel_exit();
1385
1386         return ret;
1387 }
1388
1389 static void __exit ieee80211_exit(void)
1390 {
1391         rc80211_minstrel_exit();
1392
1393         ieee80211s_stop();
1394
1395         ieee80211_iface_exit();
1396
1397         rcu_barrier();
1398 }
1399
1400
1401 subsys_initcall(ieee80211_init);
1402 module_exit(ieee80211_exit);
1403
1404 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1405 MODULE_LICENSE("GPL");