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  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <net/mac80211.h>
  13 #include <linux/module.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/pm_qos.h>
  24 #include <linux/inetdevice.h>
  25 #include <net/net_namespace.h>
  26 #include <net/cfg80211.h>
  27 #include <net/addrconf.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wep.h"
  34 #include "led.h"
  35 #include "cfg.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
 254         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 255              "%s called with hardware scan in progress\n", __func__);
 256
 257         rtnl_lock();
 258         list_for_each_entry(sdata, &local->interfaces, list)
 259                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 260         ieee80211_scan_cancel(local);
 261         ieee80211_reconfig(local);
 262         rtnl_unlock();
 263 }
 264
 265 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 266 {
 267         struct ieee80211_local *local = hw_to_local(hw);
 268
 269         trace_api_restart_hw(local);
 270
 271         wiphy_info(hw->wiphy,
 272                    "Hardware restart was requested\n");
 273
 274         /* use this reason, ieee80211_reconfig will unblock it */
 275         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 276                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 277                                         false);
 278
 279         /*
 280          * Stop all Rx during the reconfig. We don't want state changes
 281          * or driver callbacks while this is in progress.
 282          */
 283         local->in_reconfig = true;
 284         barrier();
 285
 286         schedule_work(&local->restart_work);
 287 }
 288 EXPORT_SYMBOL(ieee80211_restart_hw);
 289
 290 #ifdef CONFIG_INET
 291 static int ieee80211_ifa_changed(struct notifier_block *nb,
 292                                  unsigned long data, void *arg)
 293 {
 294         struct in_ifaddr *ifa = arg;
 295         struct ieee80211_local *local =
 296                 container_of(nb, struct ieee80211_local,
 297                              ifa_notifier);
 298         struct net_device *ndev = ifa->ifa_dev->dev;
 299         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 300         struct in_device *idev;
 301         struct ieee80211_sub_if_data *sdata;
 302         struct ieee80211_bss_conf *bss_conf;
 303         struct ieee80211_if_managed *ifmgd;
 304         int c = 0;
 305
 306         /* Make sure it's our interface that got changed */
 307         if (!wdev)
 308                 return NOTIFY_DONE;
 309
 310         if (wdev->wiphy != local->hw.wiphy)
 311                 return NOTIFY_DONE;
 312
 313         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 314         bss_conf = &sdata->vif.bss_conf;
 315
 316         /* ARP filtering is only supported in managed mode */
 317         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 318                 return NOTIFY_DONE;
 319
 320         idev = __in_dev_get_rtnl(sdata->dev);
 321         if (!idev)
 322                 return NOTIFY_DONE;
 323
 324         ifmgd = &sdata->u.mgd;
 325         sdata_lock(sdata);
 326
 327         /* Copy the addresses to the bss_conf list */
 328         ifa = idev->ifa_list;
 329         while (ifa) {
 330                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 331                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 332                 ifa = ifa->ifa_next;
 333                 c++;
 334         }
 335
 336         bss_conf->arp_addr_cnt = c;
 337
 338         /* Configure driver only if associated (which also implies it is up) */
 339         if (ifmgd->associated)
 340                 ieee80211_bss_info_change_notify(sdata,
 341                                                  BSS_CHANGED_ARP_FILTER);
 342
 343         sdata_unlock(sdata);
 344
 345         return NOTIFY_OK;
 346 }
 347 #endif
 348
 349 #if IS_ENABLED(CONFIG_IPV6)
 350 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 351                                   unsigned long data, void *arg)
 352 {
 353         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 354         struct inet6_dev *idev = ifa->idev;
 355         struct net_device *ndev = ifa->idev->dev;
 356         struct ieee80211_local *local =
 357                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 358         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 359         struct ieee80211_sub_if_data *sdata;
 360
 361         /* Make sure it's our interface that got changed */
 362         if (!wdev || wdev->wiphy != local->hw.wiphy)
 363                 return NOTIFY_DONE;
 364
 365         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 366
 367         /*
 368          * For now only support station mode. This is mostly because
 369          * doing AP would have to handle AP_VLAN in some way ...
 370          */
 371         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 372                 return NOTIFY_DONE;
 373
 374         drv_ipv6_addr_change(local, sdata, idev);
 375
 376         return NOTIFY_OK;
 377 }
 378 #endif
 379
 380 /* There isn't a lot of sense in it, but you can transmit anything you like */
 381 static const struct ieee80211_txrx_stypes
 382 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 383         [NL80211_IFTYPE_ADHOC] = {
 384                 .tx = 0xffff,
 385                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 386                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 387                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 388                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 389         },
 390         [NL80211_IFTYPE_STATION] = {
 391                 .tx = 0xffff,
 392                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 393                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 394         },
 395         [NL80211_IFTYPE_AP] = {
 396                 .tx = 0xffff,
 397                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 398                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 399                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 400                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 401                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 402                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 403                         BIT(IEEE80211_STYPE_ACTION >> 4),
 404         },
 405         [NL80211_IFTYPE_AP_VLAN] = {
 406                 /* copy AP */
 407                 .tx = 0xffff,
 408                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 409                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 410                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 411                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 412                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 413                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 414                         BIT(IEEE80211_STYPE_ACTION >> 4),
 415         },
 416         [NL80211_IFTYPE_P2P_CLIENT] = {
 417                 .tx = 0xffff,
 418                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 419                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 420         },
 421         [NL80211_IFTYPE_P2P_GO] = {
 422                 .tx = 0xffff,
 423                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 424                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 425                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 426                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 427                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 428                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 429                         BIT(IEEE80211_STYPE_ACTION >> 4),
 430         },
 431         [NL80211_IFTYPE_MESH_POINT] = {
 432                 .tx = 0xffff,
 433                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 434                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 435                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 436         },
 437         [NL80211_IFTYPE_P2P_DEVICE] = {
 438                 .tx = 0xffff,
 439                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 440                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 441         },
 442 };
 443
 444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 445         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 446                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 447
 448         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 449                                 IEEE80211_HT_CAP_MAX_AMSDU |
 450                                 IEEE80211_HT_CAP_SGI_20 |
 451                                 IEEE80211_HT_CAP_SGI_40 |
 452                                 IEEE80211_HT_CAP_LDPC_CODING |
 453                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 454         .mcs = {
 455                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 456                              0xff, 0xff, 0xff, 0xff, 0xff, },
 457         },
 458 };
 459
 460 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 461         .vht_cap_info =
 462                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 463                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 464                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 465                             IEEE80211_VHT_CAP_RXSTBC_1 |
 466                             IEEE80211_VHT_CAP_RXSTBC_2 |
 467                             IEEE80211_VHT_CAP_RXSTBC_3 |
 468                             IEEE80211_VHT_CAP_RXSTBC_4 |
 469                             IEEE80211_VHT_CAP_TXSTBC |
 470                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 471                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 472                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 473                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 474                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 475         .supp_mcs = {
 476                 .rx_mcs_map = cpu_to_le16(~0),
 477                 .tx_mcs_map = cpu_to_le16(~0),
 478         },
 479 };
 480
 481 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 482                                            const struct ieee80211_ops *ops,
 483                                            const char *requested_name)
 484 {
 485         struct ieee80211_local *local;
 486         int priv_size, i;
 487         struct wiphy *wiphy;
 488         bool use_chanctx;
 489
 490         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 491                     !ops->add_interface || !ops->remove_interface ||
 492                     !ops->configure_filter))
 493                 return NULL;
 494
 495         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 496                 return NULL;
 497
 498         /* check all or no channel context operations exist */
 499         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 500             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 501             !!ops->unassign_vif_chanctx;
 502         if (WARN_ON(i != 0 && i != 5))
 503                 return NULL;
 504         use_chanctx = i == 5;
 505
 506         /* Ensure 32-byte alignment of our private data and hw private data.
 507          * We use the wiphy priv data for both our ieee80211_local and for
 508          * the driver's private data
 509          *
 510          * In memory it'll be like this:
 511          *
 512          * +-------------------------+
 513          * | struct wiphy           |
 514          * +-------------------------+
 515          * | struct ieee80211_local  |
 516          * +-------------------------+
 517          * | driver's private data   |
 518          * +-------------------------+
 519          *
 520          */
 521         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 522
 523         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 524
 525         if (!wiphy)
 526                 return NULL;
 527
 528         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 529
 530         wiphy->privid = mac80211_wiphy_privid;
 531
 532         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 533                         WIPHY_FLAG_4ADDR_AP |
 534                         WIPHY_FLAG_4ADDR_STATION |
 535                         WIPHY_FLAG_REPORTS_OBSS |
 536                         WIPHY_FLAG_OFFCHAN_TX;
 537
 538         if (ops->remain_on_channel)
 539                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 540
 541         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 542                            NL80211_FEATURE_SAE |
 543                            NL80211_FEATURE_HT_IBSS |
 544                            NL80211_FEATURE_VIF_TXPOWER |
 545                            NL80211_FEATURE_MAC_ON_CREATE |
 546                            NL80211_FEATURE_USERSPACE_MPM;
 547
 548         if (!ops->hw_scan)
 549                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 550                                    NL80211_FEATURE_AP_SCAN;
 551
 552
 553         if (!ops->set_key)
 554                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 555
 556         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 557
 558         local = wiphy_priv(wiphy);
 559
 560         if (sta_info_init(local))
 561                 goto err_free;
 562
 563         local->hw.wiphy = wiphy;
 564
 565         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 566
 567         local->ops = ops;
 568         local->use_chanctx = use_chanctx;
 569
 570         /* set up some defaults */
 571         local->hw.queues = 1;
 572         local->hw.max_rates = 1;
 573         local->hw.max_report_rates = 0;
 574         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 575         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 576         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 577         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 578         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 579         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 580                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 581                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 582         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 583                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 584         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 585         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 586         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 587         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 588         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 589
 590         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 591
 592         wiphy->extended_capabilities = local->ext_capa;
 593         wiphy->extended_capabilities_mask = local->ext_capa;
 594         wiphy->extended_capabilities_len =
 595                 ARRAY_SIZE(local->ext_capa);
 596
 597         INIT_LIST_HEAD(&local->interfaces);
 598
 599         __hw_addr_init(&local->mc_list);
 600
 601         mutex_init(&local->iflist_mtx);
 602         mutex_init(&local->mtx);
 603
 604         mutex_init(&local->key_mtx);
 605         spin_lock_init(&local->filter_lock);
 606         spin_lock_init(&local->rx_path_lock);
 607         spin_lock_init(&local->queue_stop_reason_lock);
 608
 609         INIT_LIST_HEAD(&local->chanctx_list);
 610         mutex_init(&local->chanctx_mtx);
 611
 612         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 613
 614         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 615
 616         INIT_WORK(&local->radar_detected_work,
 617                   ieee80211_dfs_radar_detected_work);
 618
 619         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 620         local->smps_mode = IEEE80211_SMPS_OFF;
 621
 622         INIT_WORK(&local->dynamic_ps_enable_work,
 623                   ieee80211_dynamic_ps_enable_work);
 624         INIT_WORK(&local->dynamic_ps_disable_work,
 625                   ieee80211_dynamic_ps_disable_work);
 626         setup_timer(&local->dynamic_ps_timer,
 627                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 628
 629         INIT_WORK(&local->sched_scan_stopped_work,
 630                   ieee80211_sched_scan_stopped_work);
 631
 632         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 633
 634         spin_lock_init(&local->ack_status_lock);
 635         idr_init(&local->ack_status_frames);
 636
 637         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 638                 skb_queue_head_init(&local->pending[i]);
 639                 atomic_set(&local->agg_queue_stop[i], 0);
 640         }
 641         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 642                      (unsigned long)local);
 643
 644         tasklet_init(&local->tasklet,
 645                      ieee80211_tasklet_handler,
 646                      (unsigned long) local);
 647
 648         skb_queue_head_init(&local->skb_queue);
 649         skb_queue_head_init(&local->skb_queue_unreliable);
 650         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 651
 652         ieee80211_alloc_led_names(local);
 653
 654         ieee80211_roc_setup(local);
 655
 656         return &local->hw;
 657  err_free:
 658         wiphy_free(wiphy);
 659         return NULL;
 660 }
 661 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 662
 663 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 664 {
 665         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 666                           IS_ERR(local->wep_rx_tfm));
 667         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 668         int n_suites = 0, r = 0, w = 0;
 669         u32 *suites;
 670         static const u32 cipher_suites[] = {
 671                 /* keep WEP first, it may be removed below */
 672                 WLAN_CIPHER_SUITE_WEP40,
 673                 WLAN_CIPHER_SUITE_WEP104,
 674                 WLAN_CIPHER_SUITE_TKIP,
 675                 WLAN_CIPHER_SUITE_CCMP,
 676                 WLAN_CIPHER_SUITE_CCMP_256,
 677                 WLAN_CIPHER_SUITE_GCMP,
 678                 WLAN_CIPHER_SUITE_GCMP_256,
 679
 680                 /* keep last -- depends on hw flags! */
 681                 WLAN_CIPHER_SUITE_AES_CMAC,
 682                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 683                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 684                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 685         };
 686
 687         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 688             local->hw.wiphy->cipher_suites) {
 689                 /* If the driver advertises, or doesn't support SW crypto,
 690                  * we only need to remove WEP if necessary.
 691                  */
 692                 if (have_wep)
 693                         return 0;
 694
 695                 /* well if it has _no_ ciphers ... fine */
 696                 if (!local->hw.wiphy->n_cipher_suites)
 697                         return 0;
 698
 699                 /* Driver provides cipher suites, but we need to exclude WEP */
 700                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 701                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 702                                  GFP_KERNEL);
 703                 if (!suites)
 704                         return -ENOMEM;
 705
 706                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 707                         u32 suite = local->hw.wiphy->cipher_suites[r];
 708
 709                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 710                             suite == WLAN_CIPHER_SUITE_WEP104)
 711                                 continue;
 712                         suites[w++] = suite;
 713                 }
 714         } else if (!local->hw.cipher_schemes) {
 715                 /* If the driver doesn't have cipher schemes, there's nothing
 716                  * else to do other than assign the (software supported and
 717                  * perhaps offloaded) cipher suites.
 718                  */
 719                 local->hw.wiphy->cipher_suites = cipher_suites;
 720                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 721
 722                 if (!have_mfp)
 723                         local->hw.wiphy->n_cipher_suites -= 4;
 724
 725                 if (!have_wep) {
 726                         local->hw.wiphy->cipher_suites += 2;
 727                         local->hw.wiphy->n_cipher_suites -= 2;
 728                 }
 729
 730                 /* not dynamically allocated, so just return */
 731                 return 0;
 732         } else {
 733                 const struct ieee80211_cipher_scheme *cs;
 734
 735                 cs = local->hw.cipher_schemes;
 736
 737                 /* Driver specifies cipher schemes only (but not cipher suites
 738                  * including the schemes)
 739                  *
 740                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 741                  * CCMP-256, GCMP, and GCMP-256
 742                  */
 743                 n_suites = local->hw.n_cipher_schemes + 5;
 744
 745                 /* check if we have WEP40 and WEP104 */
 746                 if (have_wep)
 747                         n_suites += 2;
 748
 749                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 750                  * BIP-GMAC-256
 751                  */
 752                 if (have_mfp)
 753                         n_suites += 4;
 754
 755                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 756                 if (!suites)
 757                         return -ENOMEM;
 758
 759                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 760                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 761                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 762                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 763                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 764
 765                 if (have_wep) {
 766                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 767                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 768                 }
 769
 770                 if (have_mfp) {
 771                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 772                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 773                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 774                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 775                 }
 776
 777                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 778                         suites[w++] = cs[r].cipher;
 779                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 780                                 kfree(suites);
 781                                 return -EINVAL;
 782                         }
 783                 }
 784         }
 785
 786         local->hw.wiphy->cipher_suites = suites;
 787         local->hw.wiphy->n_cipher_suites = w;
 788         local->wiphy_ciphers_allocated = true;
 789
 790         return 0;
 791 }
 792
 793 int ieee80211_register_hw(struct ieee80211_hw *hw)
 794 {
 795         struct ieee80211_local *local = hw_to_local(hw);
 796         int result, i;
 797         enum ieee80211_band band;
 798         int channels, max_bitrates;
 799         bool supp_ht, supp_vht;
 800         netdev_features_t feature_whitelist;
 801         struct cfg80211_chan_def dflt_chandef = {};
 802
 803         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 804             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 805              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 806                 return -EINVAL;
 807
 808         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 809             (!local->ops->tdls_channel_switch ||
 810              !local->ops->tdls_cancel_channel_switch ||
 811              !local->ops->tdls_recv_channel_switch))
 812                 return -EOPNOTSUPP;
 813
 814 #ifdef CONFIG_PM
 815         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 816                 return -EINVAL;
 817 #endif
 818
 819         if (!local->use_chanctx) {
 820                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 821                         const struct ieee80211_iface_combination *comb;
 822
 823                         comb = &local->hw.wiphy->iface_combinations[i];
 824
 825                         if (comb->num_different_channels > 1)
 826                                 return -EINVAL;
 827                 }
 828         } else {
 829                 /*
 830                  * WDS is currently prohibited when channel contexts are used
 831                  * because there's no clear definition of which channel WDS
 832                  * type interfaces use
 833                  */
 834                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 835                         return -EINVAL;
 836
 837                 /* DFS is not supported with multi-channel combinations yet */
 838                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 839                         const struct ieee80211_iface_combination *comb;
 840
 841                         comb = &local->hw.wiphy->iface_combinations[i];
 842
 843                         if (comb->radar_detect_widths &&
 844                             comb->num_different_channels > 1)
 845                                 return -EINVAL;
 846                 }
 847         }
 848
 849         /* Only HW csum features are currently compatible with mac80211 */
 850         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 851                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 852                             NETIF_F_GSO_SOFTWARE;
 853         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 854                 return -EINVAL;
 855
 856         if (hw->max_report_rates == 0)
 857                 hw->max_report_rates = hw->max_rates;
 858
 859         local->rx_chains = 1;
 860
 861         /*
 862          * generic code guarantees at least one band,
 863          * set this very early because much code assumes
 864          * that hw.conf.channel is assigned
 865          */
 866         channels = 0;
 867         max_bitrates = 0;
 868         supp_ht = false;
 869         supp_vht = false;
 870         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 871                 struct ieee80211_supported_band *sband;
 872
 873                 sband = local->hw.wiphy->bands[band];
 874                 if (!sband)
 875                         continue;
 876
 877                 if (!dflt_chandef.chan) {
 878                         cfg80211_chandef_create(&dflt_chandef,
 879                                                 &sband->channels[0],
 880                                                 NL80211_CHAN_NO_HT);
 881                         /* init channel we're on */
 882                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 883                                 local->hw.conf.chandef = dflt_chandef;
 884                                 local->_oper_chandef = dflt_chandef;
 885                         }
 886                         local->monitor_chandef = dflt_chandef;
 887                 }
 888
 889                 channels += sband->n_channels;
 890
 891                 if (max_bitrates < sband->n_bitrates)
 892                         max_bitrates = sband->n_bitrates;
 893                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 894                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 895
 896                 if (sband->ht_cap.ht_supported)
 897                         local->rx_chains =
 898                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 899                                     local->rx_chains);
 900
 901                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 902         }
 903
 904         /* if low-level driver supports AP, we also support VLAN */
 905         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 906                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 907                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 908         }
 909
 910         /* mac80211 always supports monitor */
 911         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 912         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 913
 914         /* mac80211 doesn't support more than one IBSS interface right now */
 915         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 916                 const struct ieee80211_iface_combination *c;
 917                 int j;
 918
 919                 c = &hw->wiphy->iface_combinations[i];
 920
 921                 for (j = 0; j < c->n_limits; j++)
 922                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 923                             c->limits[j].max > 1)
 924                                 return -EINVAL;
 925         }
 926
 927         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 928                                       sizeof(void *) * channels, GFP_KERNEL);
 929         if (!local->int_scan_req)
 930                 return -ENOMEM;
 931
 932         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 933                 if (!local->hw.wiphy->bands[band])
 934                         continue;
 935                 local->int_scan_req->rates[band] = (u32) -1;
 936         }
 937
 938 #ifndef CONFIG_MAC80211_MESH
 939         /* mesh depends on Kconfig, but drivers should set it if they want */
 940         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 941 #endif
 942
 943         /* if the underlying driver supports mesh, mac80211 will (at least)
 944          * provide routing of mesh authentication frames to userspace */
 945         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 946                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 947
 948         /* mac80211 supports control port protocol changing */
 949         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 950
 951         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
 952                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 953         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
 954                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 955                 if (hw->max_signal <= 0) {
 956                         result = -EINVAL;
 957                         goto fail_wiphy_register;
 958                 }
 959         }
 960
 961         /*
 962          * Calculate scan IE length -- we need this to alloc
 963          * memory and to subtract from the driver limit. It
 964          * includes the DS Params, (extended) supported rates, and HT
 965          * information -- SSID is the driver's responsibility.
 966          */
 967         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 968                 3 /* DS Params */;
 969         if (supp_ht)
 970                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 971
 972         if (supp_vht)
 973                 local->scan_ies_len +=
 974                         2 + sizeof(struct ieee80211_vht_cap);
 975
 976         if (!local->ops->hw_scan) {
 977                 /* For hw_scan, driver needs to set these up. */
 978                 local->hw.wiphy->max_scan_ssids = 4;
 979                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 980         }
 981
 982         /*
 983          * If the driver supports any scan IEs, then assume the
 984          * limit includes the IEs mac80211 will add, otherwise
 985          * leave it at zero and let the driver sort it out; we
 986          * still pass our IEs to the driver but userspace will
 987          * not be allowed to in that case.
 988          */
 989         if (local->hw.wiphy->max_scan_ie_len)
 990                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
 991
 992         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
 993                                          local->hw.n_cipher_schemes));
 994
 995         result = ieee80211_init_cipher_suites(local);
 996         if (result < 0)
 997                 goto fail_wiphy_register;
 998
 999         if (!local->ops->remain_on_channel)
1000                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1001
1002         /* mac80211 based drivers don't support internal TDLS setup */
1003         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1004                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1005
1006         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1007         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1008                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1009
1010         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1011
1012         result = wiphy_register(local->hw.wiphy);
1013         if (result < 0)
1014                 goto fail_wiphy_register;
1015
1016         /*
1017          * We use the number of queues for feature tests (QoS, HT) internally
1018          * so restrict them appropriately.
1019          */
1020         if (hw->queues > IEEE80211_MAX_QUEUES)
1021                 hw->queues = IEEE80211_MAX_QUEUES;
1022
1023         local->workqueue =
1024                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1025         if (!local->workqueue) {
1026                 result = -ENOMEM;
1027                 goto fail_workqueue;
1028         }
1029
1030         /*
1031          * The hardware needs headroom for sending the frame,
1032          * and we need some headroom for passing the frame to monitor
1033          * interfaces, but never both at the same time.
1034          */
1035         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1036                                    IEEE80211_TX_STATUS_HEADROOM);
1037
1038         debugfs_hw_add(local);
1039
1040         /*
1041          * if the driver doesn't specify a max listen interval we
1042          * use 5 which should be a safe default
1043          */
1044         if (local->hw.max_listen_interval == 0)
1045                 local->hw.max_listen_interval = 5;
1046
1047         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1048
1049         local->dynamic_ps_forced_timeout = -1;
1050
1051         if (!local->hw.txq_ac_max_pending)
1052                 local->hw.txq_ac_max_pending = 64;
1053
1054         result = ieee80211_wep_init(local);
1055         if (result < 0)
1056                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1057                             result);
1058
1059         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1060
1061         ieee80211_led_init(local);
1062
1063         rtnl_lock();
1064
1065         result = ieee80211_init_rate_ctrl_alg(local,
1066                                               hw->rate_control_algorithm);
1067         if (result < 0) {
1068                 wiphy_debug(local->hw.wiphy,
1069                             "Failed to initialize rate control algorithm\n");
1070                 goto fail_rate;
1071         }
1072
1073         /* add one default STA interface if supported */
1074         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1075             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1076                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1077                                           NL80211_IFTYPE_STATION, NULL);
1078                 if (result)
1079                         wiphy_warn(local->hw.wiphy,
1080                                    "Failed to add default virtual iface\n");
1081         }
1082
1083         rtnl_unlock();
1084
1085         local->network_latency_notifier.notifier_call =
1086                 ieee80211_max_network_latency;
1087         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1088                                      &local->network_latency_notifier);
1089         if (result)
1090                 goto fail_pm_qos;
1091
1092 #ifdef CONFIG_INET
1093         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1094         result = register_inetaddr_notifier(&local->ifa_notifier);
1095         if (result)
1096                 goto fail_ifa;
1097 #endif
1098
1099 #if IS_ENABLED(CONFIG_IPV6)
1100         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1101         result = register_inet6addr_notifier(&local->ifa6_notifier);
1102         if (result)
1103                 goto fail_ifa6;
1104 #endif
1105
1106         return 0;
1107
1108 #if IS_ENABLED(CONFIG_IPV6)
1109  fail_ifa6:
1110 #ifdef CONFIG_INET
1111         unregister_inetaddr_notifier(&local->ifa_notifier);
1112 #endif
1113 #endif
1114 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1115  fail_ifa:
1116         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1117                                &local->network_latency_notifier);
1118 #endif
1119  fail_pm_qos:
1120         rtnl_lock();
1121         rate_control_deinitialize(local);
1122         ieee80211_remove_interfaces(local);
1123  fail_rate:
1124         rtnl_unlock();
1125         ieee80211_led_exit(local);
1126         ieee80211_wep_free(local);
1127         destroy_workqueue(local->workqueue);
1128  fail_workqueue:
1129         wiphy_unregister(local->hw.wiphy);
1130  fail_wiphy_register:
1131         if (local->wiphy_ciphers_allocated)
1132                 kfree(local->hw.wiphy->cipher_suites);
1133         kfree(local->int_scan_req);
1134         return result;
1135 }
1136 EXPORT_SYMBOL(ieee80211_register_hw);
1137
1138 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1139 {
1140         struct ieee80211_local *local = hw_to_local(hw);
1141
1142         tasklet_kill(&local->tx_pending_tasklet);
1143         tasklet_kill(&local->tasklet);
1144
1145         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1146                                &local->network_latency_notifier);
1147 #ifdef CONFIG_INET
1148         unregister_inetaddr_notifier(&local->ifa_notifier);
1149 #endif
1150 #if IS_ENABLED(CONFIG_IPV6)
1151         unregister_inet6addr_notifier(&local->ifa6_notifier);
1152 #endif
1153
1154         rtnl_lock();
1155
1156         /*
1157          * At this point, interface list manipulations are fine
1158          * because the driver cannot be handing us frames any
1159          * more and the tasklet is killed.
1160          */
1161         ieee80211_remove_interfaces(local);
1162
1163         rtnl_unlock();
1164
1165         cancel_work_sync(&local->restart_work);
1166         cancel_work_sync(&local->reconfig_filter);
1167         cancel_work_sync(&local->tdls_chsw_work);
1168         flush_work(&local->sched_scan_stopped_work);
1169
1170         ieee80211_clear_tx_pending(local);
1171         rate_control_deinitialize(local);
1172
1173         if (skb_queue_len(&local->skb_queue) ||
1174             skb_queue_len(&local->skb_queue_unreliable))
1175                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1176         skb_queue_purge(&local->skb_queue);
1177         skb_queue_purge(&local->skb_queue_unreliable);
1178         skb_queue_purge(&local->skb_queue_tdls_chsw);
1179
1180         destroy_workqueue(local->workqueue);
1181         wiphy_unregister(local->hw.wiphy);
1182         ieee80211_wep_free(local);
1183         ieee80211_led_exit(local);
1184         kfree(local->int_scan_req);
1185 }
1186 EXPORT_SYMBOL(ieee80211_unregister_hw);
1187
1188 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1189 {
1190         WARN_ONCE(1, "Have pending ack frames!\n");
1191         kfree_skb(p);
1192         return 0;
1193 }
1194
1195 void ieee80211_free_hw(struct ieee80211_hw *hw)
1196 {
1197         struct ieee80211_local *local = hw_to_local(hw);
1198
1199         mutex_destroy(&local->iflist_mtx);
1200         mutex_destroy(&local->mtx);
1201
1202         if (local->wiphy_ciphers_allocated)
1203                 kfree(local->hw.wiphy->cipher_suites);
1204
1205         idr_for_each(&local->ack_status_frames,
1206                      ieee80211_free_ack_frame, NULL);
1207         idr_destroy(&local->ack_status_frames);
1208
1209         sta_info_stop(local);
1210
1211         ieee80211_free_led_names(local);
1212
1213         wiphy_free(local->hw.wiphy);
1214 }
1215 EXPORT_SYMBOL(ieee80211_free_hw);
1216
1217 static int __init ieee80211_init(void)
1218 {
1219         struct sk_buff *skb;
1220         int ret;
1221
1222         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1223         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1224                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1225
1226         ret = rc80211_minstrel_init();
1227         if (ret)
1228                 return ret;
1229
1230         ret = rc80211_minstrel_ht_init();
1231         if (ret)
1232                 goto err_minstrel;
1233
1234         ret = ieee80211_iface_init();
1235         if (ret)
1236                 goto err_netdev;
1237
1238         return 0;
1239  err_netdev:
1240         rc80211_minstrel_ht_exit();
1241  err_minstrel:
1242         rc80211_minstrel_exit();
1243
1244         return ret;
1245 }
1246
1247 static void __exit ieee80211_exit(void)
1248 {
1249         rc80211_minstrel_ht_exit();
1250         rc80211_minstrel_exit();
1251
1252         ieee80211s_stop();
1253
1254         ieee80211_iface_exit();
1255
1256         rcu_barrier();
1257 }
1258
1259
1260 subsys_initcall(ieee80211_init);
1261 module_exit(ieee80211_exit);
1262
1263 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1264 MODULE_LICENSE("GPL");