net/mac80211/main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  * Copyright (C) 2017     Intel Deutschland GmbH
   8  * Copyright (C) 2018 - 2019 Intel Corporation
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <linux/module.h>
  13 #include <linux/fips.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "debugfs.h"
  35
  36 void ieee80211_configure_filter(struct ieee80211_local *local)
  37 {
  38         u64 mc;
  39         unsigned int changed_flags;
  40         unsigned int new_flags = 0;
  41
  42         if (atomic_read(&local->iff_allmultis))
  43                 new_flags |= FIF_ALLMULTI;
  44
  45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  48
  49         if (local->fif_probe_req || local->probe_req_reg)
  50                 new_flags |= FIF_PROBE_REQ;
  51
  52         if (local->fif_fcsfail)
  53                 new_flags |= FIF_FCSFAIL;
  54
  55         if (local->fif_plcpfail)
  56                 new_flags |= FIF_PLCPFAIL;
  57
  58         if (local->fif_control)
  59                 new_flags |= FIF_CONTROL;
  60
  61         if (local->fif_other_bss)
  62                 new_flags |= FIF_OTHER_BSS;
  63
  64         if (local->fif_pspoll)
  65                 new_flags |= FIF_PSPOLL;
  66
  67         spin_lock_bh(&local->filter_lock);
  68         changed_flags = local->filter_flags ^ new_flags;
  69
  70         mc = drv_prepare_multicast(local, &local->mc_list);
  71         spin_unlock_bh(&local->filter_lock);
  72
  73         /* be a bit nasty */
  74         new_flags |= (1<<31);
  75
  76         drv_configure_filter(local, changed_flags, &new_flags, mc);
  77
  78         WARN_ON(new_flags & (1<<31));
  79
  80         local->filter_flags = new_flags & ~(1<<31);
  81 }
  82
  83 static void ieee80211_reconfig_filter(struct work_struct *work)
  84 {
  85         struct ieee80211_local *local =
  86                 container_of(work, struct ieee80211_local, reconfig_filter);
  87
  88         ieee80211_configure_filter(local);
  89 }
  90
  91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  92 {
  93         struct ieee80211_sub_if_data *sdata;
  94         struct cfg80211_chan_def chandef = {};
  95         u32 changed = 0;
  96         int power;
  97         u32 offchannel_flag;
  98
  99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 100
 101         if (local->scan_chandef.chan) {
 102                 chandef = local->scan_chandef;
 103         } else if (local->tmp_channel) {
 104                 chandef.chan = local->tmp_channel;
 105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 106                 chandef.center_freq1 = chandef.chan->center_freq;
 107         } else
 108                 chandef = local->_oper_chandef;
 109
 110         WARN(!cfg80211_chandef_valid(&chandef),
 111              "control:%d MHz width:%d center: %d/%d MHz",
 112              chandef.chan->center_freq, chandef.width,
 113              chandef.center_freq1, chandef.center_freq2);
 114
 115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 117         else
 118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 119
 120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 121
 122         if (offchannel_flag ||
 123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 124                                         &local->_oper_chandef)) {
 125                 local->hw.conf.chandef = chandef;
 126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 127         }
 128
 129         if (!conf_is_ht(&local->hw.conf)) {
 130                 /*
 131                  * mac80211.h documents that this is only valid
 132                  * when the channel is set to an HT type, and
 133                  * that otherwise STATIC is used.
 134                  */
 135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 137                 local->hw.conf.smps_mode = local->smps_mode;
 138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 139         }
 140
 141         power = ieee80211_chandef_max_power(&chandef);
 142
 143         rcu_read_lock();
 144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 146                         continue;
 147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 148                         continue;
 149                 if (sdata->vif.bss_conf.txpower == INT_MIN)
 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 = rtnl_dereference(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 = rtnl_dereference(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                 /*
 422                  * To support Pre Association Security Negotiation (PASN) while
 423                  * already associated to one AP, allow user space to register to
 424                  * Rx authentication frames, so that the user space logic would
 425                  * be able to receive/handle authentication frames from a
 426                  * different AP as part of PASN.
 427                  * It is expected that user space would intelligently register
 428                  * for Rx authentication frames, i.e., only when PASN is used
 429                  * and configure a match filter only for PASN authentication
 430                  * algorithm, as otherwise the MLME functionality of mac80211
 431                  * would be broken.
 432                  */
 433                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 434                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 435                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 436         },
 437         [NL80211_IFTYPE_AP] = {
 438                 .tx = 0xffff,
 439                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 440                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 441                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 442                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 443                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 444                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 445                         BIT(IEEE80211_STYPE_ACTION >> 4),
 446         },
 447         [NL80211_IFTYPE_AP_VLAN] = {
 448                 /* copy AP */
 449                 .tx = 0xffff,
 450                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 451                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 452                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 453                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 454                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 455                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 456                         BIT(IEEE80211_STYPE_ACTION >> 4),
 457         },
 458         [NL80211_IFTYPE_P2P_CLIENT] = {
 459                 .tx = 0xffff,
 460                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 461                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 462         },
 463         [NL80211_IFTYPE_P2P_GO] = {
 464                 .tx = 0xffff,
 465                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 466                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 467                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 468                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 469                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 470                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 471                         BIT(IEEE80211_STYPE_ACTION >> 4),
 472         },
 473         [NL80211_IFTYPE_MESH_POINT] = {
 474                 .tx = 0xffff,
 475                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 476                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 477                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 478         },
 479         [NL80211_IFTYPE_P2P_DEVICE] = {
 480                 .tx = 0xffff,
 481                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 482                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 483         },
 484 };
 485
 486 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 487         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 488                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 489
 490         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 491                                 IEEE80211_HT_CAP_MAX_AMSDU |
 492                                 IEEE80211_HT_CAP_SGI_20 |
 493                                 IEEE80211_HT_CAP_SGI_40 |
 494                                 IEEE80211_HT_CAP_TX_STBC |
 495                                 IEEE80211_HT_CAP_RX_STBC |
 496                                 IEEE80211_HT_CAP_LDPC_CODING |
 497                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 498         .mcs = {
 499                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 500                              0xff, 0xff, 0xff, 0xff, 0xff, },
 501         },
 502 };
 503
 504 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 505         .vht_cap_info =
 506                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 507                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 508                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 509                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 510                             IEEE80211_VHT_CAP_TXSTBC |
 511                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 512                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 513                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 514                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 515                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 516         .supp_mcs = {
 517                 .rx_mcs_map = cpu_to_le16(~0),
 518                 .tx_mcs_map = cpu_to_le16(~0),
 519         },
 520 };
 521
 522 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 523                                            const struct ieee80211_ops *ops,
 524                                            const char *requested_name)
 525 {
 526         struct ieee80211_local *local;
 527         int priv_size, i;
 528         struct wiphy *wiphy;
 529         bool use_chanctx;
 530
 531         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 532                     !ops->add_interface || !ops->remove_interface ||
 533                     !ops->configure_filter))
 534                 return NULL;
 535
 536         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 537                 return NULL;
 538
 539         /* check all or no channel context operations exist */
 540         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 541             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 542             !!ops->unassign_vif_chanctx;
 543         if (WARN_ON(i != 0 && i != 5))
 544                 return NULL;
 545         use_chanctx = i == 5;
 546
 547         /* Ensure 32-byte alignment of our private data and hw private data.
 548          * We use the wiphy priv data for both our ieee80211_local and for
 549          * the driver's private data
 550          *
 551          * In memory it'll be like this:
 552          *
 553          * +-------------------------+
 554          * | struct wiphy           |
 555          * +-------------------------+
 556          * | struct ieee80211_local  |
 557          * +-------------------------+
 558          * | driver's private data   |
 559          * +-------------------------+
 560          *
 561          */
 562         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 563
 564         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 565
 566         if (!wiphy)
 567                 return NULL;
 568
 569         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 570
 571         wiphy->privid = mac80211_wiphy_privid;
 572
 573         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 574                         WIPHY_FLAG_4ADDR_AP |
 575                         WIPHY_FLAG_4ADDR_STATION |
 576                         WIPHY_FLAG_REPORTS_OBSS |
 577                         WIPHY_FLAG_OFFCHAN_TX;
 578
 579         if (!use_chanctx || ops->remain_on_channel)
 580                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 581
 582         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 583                            NL80211_FEATURE_SAE |
 584                            NL80211_FEATURE_HT_IBSS |
 585                            NL80211_FEATURE_VIF_TXPOWER |
 586                            NL80211_FEATURE_MAC_ON_CREATE |
 587                            NL80211_FEATURE_USERSPACE_MPM |
 588                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 589         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 590         wiphy_ext_feature_set(wiphy,
 591                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 592         wiphy_ext_feature_set(wiphy,
 593                               NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
 594
 595         if (!ops->hw_scan) {
 596                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 597                                    NL80211_FEATURE_AP_SCAN;
 598                 /*
 599                  * if the driver behaves correctly using the probe request
 600                  * (template) from mac80211, then both of these should be
 601                  * supported even with hw scan - but let drivers opt in.
 602                  */
 603                 wiphy_ext_feature_set(wiphy,
 604                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 605                 wiphy_ext_feature_set(wiphy,
 606                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 607         }
 608
 609         if (!ops->set_key)
 610                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 611
 612         if (ops->wake_tx_queue)
 613                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 614
 615         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 616
 617         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 618
 619         local = wiphy_priv(wiphy);
 620
 621         if (sta_info_init(local))
 622                 goto err_free;
 623
 624         local->hw.wiphy = wiphy;
 625
 626         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 627
 628         local->ops = ops;
 629         local->use_chanctx = use_chanctx;
 630
 631         /*
 632          * We need a bit of data queued to build aggregates properly, so
 633          * instruct the TCP stack to allow more than a single ms of data
 634          * to be queued in the stack. The value is a bit-shift of 1
 635          * second, so 7 is ~8ms of queued data. Only affects local TCP
 636          * sockets.
 637          * This is the default, anyhow - drivers may need to override it
 638          * for local reasons (longer buffers, longer completion time, or
 639          * similar).
 640          */
 641         local->hw.tx_sk_pacing_shift = 7;
 642
 643         /* set up some defaults */
 644         local->hw.queues = 1;
 645         local->hw.max_rates = 1;
 646         local->hw.max_report_rates = 0;
 647         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 648         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 649         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 650         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 651         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 652         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 653                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 654                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 655         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 656                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 657         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 658         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 659         local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
 660         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 661         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 662         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 663
 664         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 665
 666         wiphy->extended_capabilities = local->ext_capa;
 667         wiphy->extended_capabilities_mask = local->ext_capa;
 668         wiphy->extended_capabilities_len =
 669                 ARRAY_SIZE(local->ext_capa);
 670
 671         INIT_LIST_HEAD(&local->interfaces);
 672         INIT_LIST_HEAD(&local->mon_list);
 673
 674         __hw_addr_init(&local->mc_list);
 675
 676         mutex_init(&local->iflist_mtx);
 677         mutex_init(&local->mtx);
 678
 679         mutex_init(&local->key_mtx);
 680         spin_lock_init(&local->filter_lock);
 681         spin_lock_init(&local->rx_path_lock);
 682         spin_lock_init(&local->queue_stop_reason_lock);
 683
 684         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 685                 INIT_LIST_HEAD(&local->active_txqs[i]);
 686                 spin_lock_init(&local->active_txq_lock[i]);
 687                 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
 688                 local->aql_txq_limit_high[i] =
 689                         IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
 690         }
 691
 692         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 693         local->aql_threshold = IEEE80211_AQL_THRESHOLD;
 694         atomic_set(&local->aql_total_pending_airtime, 0);
 695
 696         INIT_LIST_HEAD(&local->chanctx_list);
 697         mutex_init(&local->chanctx_mtx);
 698
 699         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 700
 701         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 702
 703         INIT_WORK(&local->radar_detected_work,
 704                   ieee80211_dfs_radar_detected_work);
 705
 706         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 707         local->smps_mode = IEEE80211_SMPS_OFF;
 708
 709         INIT_WORK(&local->dynamic_ps_enable_work,
 710                   ieee80211_dynamic_ps_enable_work);
 711         INIT_WORK(&local->dynamic_ps_disable_work,
 712                   ieee80211_dynamic_ps_disable_work);
 713         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 714
 715         INIT_WORK(&local->sched_scan_stopped_work,
 716                   ieee80211_sched_scan_stopped_work);
 717
 718         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 719
 720         spin_lock_init(&local->ack_status_lock);
 721         idr_init(&local->ack_status_frames);
 722
 723         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 724                 skb_queue_head_init(&local->pending[i]);
 725                 atomic_set(&local->agg_queue_stop[i], 0);
 726         }
 727         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 728                      (unsigned long)local);
 729
 730         if (ops->wake_tx_queue)
 731                 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
 732                              (unsigned long)local);
 733
 734         tasklet_init(&local->tasklet,
 735                      ieee80211_tasklet_handler,
 736                      (unsigned long) local);
 737
 738         skb_queue_head_init(&local->skb_queue);
 739         skb_queue_head_init(&local->skb_queue_unreliable);
 740         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 741
 742         ieee80211_alloc_led_names(local);
 743
 744         ieee80211_roc_setup(local);
 745
 746         local->hw.radiotap_timestamp.units_pos = -1;
 747         local->hw.radiotap_timestamp.accuracy = -1;
 748
 749         return &local->hw;
 750  err_free:
 751         wiphy_free(wiphy);
 752         return NULL;
 753 }
 754 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 755
 756 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 757 {
 758         bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
 759         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 760         int n_suites = 0, r = 0, w = 0;
 761         u32 *suites;
 762         static const u32 cipher_suites[] = {
 763                 /* keep WEP first, it may be removed below */
 764                 WLAN_CIPHER_SUITE_WEP40,
 765                 WLAN_CIPHER_SUITE_WEP104,
 766                 WLAN_CIPHER_SUITE_TKIP,
 767                 WLAN_CIPHER_SUITE_CCMP,
 768                 WLAN_CIPHER_SUITE_CCMP_256,
 769                 WLAN_CIPHER_SUITE_GCMP,
 770                 WLAN_CIPHER_SUITE_GCMP_256,
 771
 772                 /* keep last -- depends on hw flags! */
 773                 WLAN_CIPHER_SUITE_AES_CMAC,
 774                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 775                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 776                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 777         };
 778
 779         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 780             local->hw.wiphy->cipher_suites) {
 781                 /* If the driver advertises, or doesn't support SW crypto,
 782                  * we only need to remove WEP if necessary.
 783                  */
 784                 if (have_wep)
 785                         return 0;
 786
 787                 /* well if it has _no_ ciphers ... fine */
 788                 if (!local->hw.wiphy->n_cipher_suites)
 789                         return 0;
 790
 791                 /* Driver provides cipher suites, but we need to exclude WEP */
 792                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 793                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 794                                  GFP_KERNEL);
 795                 if (!suites)
 796                         return -ENOMEM;
 797
 798                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 799                         u32 suite = local->hw.wiphy->cipher_suites[r];
 800
 801                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 802                             suite == WLAN_CIPHER_SUITE_WEP104)
 803                                 continue;
 804                         suites[w++] = suite;
 805                 }
 806         } else if (!local->hw.cipher_schemes) {
 807                 /* If the driver doesn't have cipher schemes, there's nothing
 808                  * else to do other than assign the (software supported and
 809                  * perhaps offloaded) cipher suites.
 810                  */
 811                 local->hw.wiphy->cipher_suites = cipher_suites;
 812                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 813
 814                 if (!have_mfp)
 815                         local->hw.wiphy->n_cipher_suites -= 4;
 816
 817                 if (!have_wep) {
 818                         local->hw.wiphy->cipher_suites += 2;
 819                         local->hw.wiphy->n_cipher_suites -= 2;
 820                 }
 821
 822                 /* not dynamically allocated, so just return */
 823                 return 0;
 824         } else {
 825                 const struct ieee80211_cipher_scheme *cs;
 826
 827                 cs = local->hw.cipher_schemes;
 828
 829                 /* Driver specifies cipher schemes only (but not cipher suites
 830                  * including the schemes)
 831                  *
 832                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 833                  * CCMP-256, GCMP, and GCMP-256
 834                  */
 835                 n_suites = local->hw.n_cipher_schemes + 5;
 836
 837                 /* check if we have WEP40 and WEP104 */
 838                 if (have_wep)
 839                         n_suites += 2;
 840
 841                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 842                  * BIP-GMAC-256
 843                  */
 844                 if (have_mfp)
 845                         n_suites += 4;
 846
 847                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
 848                 if (!suites)
 849                         return -ENOMEM;
 850
 851                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 852                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 853                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 854                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 855                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 856
 857                 if (have_wep) {
 858                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 859                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 860                 }
 861
 862                 if (have_mfp) {
 863                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 864                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 865                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 866                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 867                 }
 868
 869                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 870                         suites[w++] = cs[r].cipher;
 871                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 872                                 kfree(suites);
 873                                 return -EINVAL;
 874                         }
 875                 }
 876         }
 877
 878         local->hw.wiphy->cipher_suites = suites;
 879         local->hw.wiphy->n_cipher_suites = w;
 880         local->wiphy_ciphers_allocated = true;
 881
 882         return 0;
 883 }
 884
 885 int ieee80211_register_hw(struct ieee80211_hw *hw)
 886 {
 887         struct ieee80211_local *local = hw_to_local(hw);
 888         int result, i;
 889         enum nl80211_band band;
 890         int channels, max_bitrates;
 891         bool supp_ht, supp_vht, supp_he;
 892         struct cfg80211_chan_def dflt_chandef = {};
 893
 894         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 895             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 896              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 897                 return -EINVAL;
 898
 899         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 900             (!local->ops->tdls_channel_switch ||
 901              !local->ops->tdls_cancel_channel_switch ||
 902              !local->ops->tdls_recv_channel_switch))
 903                 return -EOPNOTSUPP;
 904
 905         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 906                     !local->ops->set_frag_threshold))
 907                 return -EINVAL;
 908
 909         if (WARN_ON(local->hw.wiphy->interface_modes &
 910                         BIT(NL80211_IFTYPE_NAN) &&
 911                     (!local->ops->start_nan || !local->ops->stop_nan)))
 912                 return -EINVAL;
 913
 914 #ifdef CONFIG_PM
 915         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 916                 return -EINVAL;
 917 #endif
 918
 919         if (!local->use_chanctx) {
 920                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 921                         const struct ieee80211_iface_combination *comb;
 922
 923                         comb = &local->hw.wiphy->iface_combinations[i];
 924
 925                         if (comb->num_different_channels > 1)
 926                                 return -EINVAL;
 927                 }
 928         } else {
 929                 /*
 930                  * WDS is currently prohibited when channel contexts are used
 931                  * because there's no clear definition of which channel WDS
 932                  * type interfaces use
 933                  */
 934                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 935                         return -EINVAL;
 936
 937                 /* DFS is not supported with multi-channel combinations yet */
 938                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 939                         const struct ieee80211_iface_combination *comb;
 940
 941                         comb = &local->hw.wiphy->iface_combinations[i];
 942
 943                         if (comb->radar_detect_widths &&
 944                             comb->num_different_channels > 1)
 945                                 return -EINVAL;
 946                 }
 947         }
 948
 949         /* Only HW csum features are currently compatible with mac80211 */
 950         if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
 951                 return -EINVAL;
 952
 953         if (hw->max_report_rates == 0)
 954                 hw->max_report_rates = hw->max_rates;
 955
 956         local->rx_chains = 1;
 957
 958         /*
 959          * generic code guarantees at least one band,
 960          * set this very early because much code assumes
 961          * that hw.conf.channel is assigned
 962          */
 963         channels = 0;
 964         max_bitrates = 0;
 965         supp_ht = false;
 966         supp_vht = false;
 967         supp_he = false;
 968         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 969                 struct ieee80211_supported_band *sband;
 970
 971                 sband = local->hw.wiphy->bands[band];
 972                 if (!sband)
 973                         continue;
 974
 975                 if (!dflt_chandef.chan) {
 976                         cfg80211_chandef_create(&dflt_chandef,
 977                                                 &sband->channels[0],
 978                                                 NL80211_CHAN_NO_HT);
 979                         /* init channel we're on */
 980                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 981                                 local->hw.conf.chandef = dflt_chandef;
 982                                 local->_oper_chandef = dflt_chandef;
 983                         }
 984                         local->monitor_chandef = dflt_chandef;
 985                 }
 986
 987                 channels += sband->n_channels;
 988
 989                 if (max_bitrates < sband->n_bitrates)
 990                         max_bitrates = sband->n_bitrates;
 991                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 992                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 993
 994                 if (!supp_he)
 995                         supp_he = !!ieee80211_get_he_sta_cap(sband);
 996
 997                 /* HT, VHT, HE require QoS, thus >= 4 queues */
 998                 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
 999                             (supp_ht || supp_vht || supp_he)))
1000                         return -EINVAL;
1001
1002                 if (!sband->ht_cap.ht_supported)
1003                         continue;
1004
1005                 /* TODO: consider VHT for RX chains, hopefully it's the same */
1006                 local->rx_chains =
1007                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1008                             local->rx_chains);
1009
1010                 /* no need to mask, SM_PS_DISABLED has all bits set */
1011                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1012                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
1013         }
1014
1015         /* if low-level driver supports AP, we also support VLAN.
1016          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1017          * based on their support to transmit SW encrypted packets.
1018          */
1019         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1020             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1021                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1022                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1023         }
1024
1025         /* mac80211 always supports monitor */
1026         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1027         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1028
1029         /* mac80211 doesn't support more than one IBSS interface right now */
1030         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1031                 const struct ieee80211_iface_combination *c;
1032                 int j;
1033
1034                 c = &hw->wiphy->iface_combinations[i];
1035
1036                 for (j = 0; j < c->n_limits; j++)
1037                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1038                             c->limits[j].max > 1)
1039                                 return -EINVAL;
1040         }
1041
1042         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1043                                       sizeof(void *) * channels, GFP_KERNEL);
1044         if (!local->int_scan_req)
1045                 return -ENOMEM;
1046
1047         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1048                 if (!local->hw.wiphy->bands[band])
1049                         continue;
1050                 local->int_scan_req->rates[band] = (u32) -1;
1051         }
1052
1053 #ifndef CONFIG_MAC80211_MESH
1054         /* mesh depends on Kconfig, but drivers should set it if they want */
1055         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1056 #endif
1057
1058         /* if the underlying driver supports mesh, mac80211 will (at least)
1059          * provide routing of mesh authentication frames to userspace */
1060         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1061                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1062
1063         /* mac80211 supports control port protocol changing */
1064         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1065
1066         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1067                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1068         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1069                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1070                 if (hw->max_signal <= 0) {
1071                         result = -EINVAL;
1072                         goto fail_wiphy_register;
1073                 }
1074         }
1075
1076         /* Mac80211 and therefore all drivers using SW crypto only
1077          * are able to handle PTK rekeys and Extended Key ID.
1078          */
1079         if (!local->ops->set_key) {
1080                 wiphy_ext_feature_set(local->hw.wiphy,
1081                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1082                 wiphy_ext_feature_set(local->hw.wiphy,
1083                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1084         }
1085
1086         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1087                 wiphy_ext_feature_set(local->hw.wiphy,
1088                                       NL80211_EXT_FEATURE_DEL_IBSS_STA);
1089
1090         /*
1091          * Calculate scan IE length -- we need this to alloc
1092          * memory and to subtract from the driver limit. It
1093          * includes the DS Params, (extended) supported rates, and HT
1094          * information -- SSID is the driver's responsibility.
1095          */
1096         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1097                 3 /* DS Params */;
1098         if (supp_ht)
1099                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1100
1101         if (supp_vht)
1102                 local->scan_ies_len +=
1103                         2 + sizeof(struct ieee80211_vht_cap);
1104
1105         /* HE cap element is variable in size - set len to allow max size */
1106         /*
1107          * TODO: 1 is added at the end of the calculation to accommodate for
1108          *      the temporary placing of the HE capabilities IE under EXT.
1109          *      Remove it once it is placed in the final place.
1110          */
1111         if (supp_he)
1112                 local->scan_ies_len +=
1113                         2 + sizeof(struct ieee80211_he_cap_elem) +
1114                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1115                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1116
1117         if (!local->ops->hw_scan) {
1118                 /* For hw_scan, driver needs to set these up. */
1119                 local->hw.wiphy->max_scan_ssids = 4;
1120                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1121         }
1122
1123         /*
1124          * If the driver supports any scan IEs, then assume the
1125          * limit includes the IEs mac80211 will add, otherwise
1126          * leave it at zero and let the driver sort it out; we
1127          * still pass our IEs to the driver but userspace will
1128          * not be allowed to in that case.
1129          */
1130         if (local->hw.wiphy->max_scan_ie_len)
1131                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1132
1133         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1134                                          local->hw.n_cipher_schemes));
1135
1136         result = ieee80211_init_cipher_suites(local);
1137         if (result < 0)
1138                 goto fail_wiphy_register;
1139
1140         if (!local->ops->remain_on_channel)
1141                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1142
1143         /* mac80211 based drivers don't support internal TDLS setup */
1144         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1145                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1146
1147         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1148         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1149                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1150
1151         /* mac80211 supports multi BSSID, if the driver supports it */
1152         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1153                 local->hw.wiphy->support_mbssid = true;
1154                 if (ieee80211_hw_check(&local->hw,
1155                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1156                         local->hw.wiphy->support_only_he_mbssid = true;
1157                 else
1158                         local->ext_capa[2] |=
1159                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1160         }
1161
1162         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1163
1164         result = wiphy_register(local->hw.wiphy);
1165         if (result < 0)
1166                 goto fail_wiphy_register;
1167
1168         /*
1169          * We use the number of queues for feature tests (QoS, HT) internally
1170          * so restrict them appropriately.
1171          */
1172         if (hw->queues > IEEE80211_MAX_QUEUES)
1173                 hw->queues = IEEE80211_MAX_QUEUES;
1174
1175         local->workqueue =
1176                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1177         if (!local->workqueue) {
1178                 result = -ENOMEM;
1179                 goto fail_workqueue;
1180         }
1181
1182         /*
1183          * The hardware needs headroom for sending the frame,
1184          * and we need some headroom for passing the frame to monitor
1185          * interfaces, but never both at the same time.
1186          */
1187         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1188                                    IEEE80211_TX_STATUS_HEADROOM);
1189
1190         debugfs_hw_add(local);
1191
1192         /*
1193          * if the driver doesn't specify a max listen interval we
1194          * use 5 which should be a safe default
1195          */
1196         if (local->hw.max_listen_interval == 0)
1197                 local->hw.max_listen_interval = 5;
1198
1199         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1200
1201         local->dynamic_ps_forced_timeout = -1;
1202
1203         if (!local->hw.max_nan_de_entries)
1204                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1205
1206         if (!local->hw.weight_multiplier)
1207                 local->hw.weight_multiplier = 1;
1208
1209         ieee80211_wep_init(local);
1210
1211         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1212
1213         ieee80211_led_init(local);
1214
1215         result = ieee80211_txq_setup_flows(local);
1216         if (result)
1217                 goto fail_flows;
1218
1219         rtnl_lock();
1220
1221         result = ieee80211_init_rate_ctrl_alg(local,
1222                                               hw->rate_control_algorithm);
1223         if (result < 0) {
1224                 wiphy_debug(local->hw.wiphy,
1225                             "Failed to initialize rate control algorithm\n");
1226                 goto fail_rate;
1227         }
1228
1229         if (local->rate_ctrl) {
1230                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1231                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1232                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1233         }
1234
1235         /*
1236          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1237          * or have it when we don't, copy the sband structure and set/clear it.
1238          * This is necessary because rate scaling algorithms could be switched
1239          * and have different support values.
1240          * Print a message so that in the common case the reallocation can be
1241          * avoided.
1242          */
1243         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1244         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1245                 struct ieee80211_supported_band *sband;
1246                 bool local_cap, ie_cap;
1247
1248                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1249
1250                 sband = local->hw.wiphy->bands[band];
1251                 if (!sband || !sband->vht_cap.vht_supported)
1252                         continue;
1253
1254                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1255                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1256
1257                 if (local_cap == ie_cap)
1258                         continue;
1259
1260                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1261                 if (!sband) {
1262                         result = -ENOMEM;
1263                         goto fail_rate;
1264                 }
1265
1266                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1267                           band);
1268
1269                 sband->vht_cap.vht_mcs.tx_highest ^=
1270                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1271
1272                 local->hw.wiphy->bands[band] = sband;
1273                 local->sband_allocated |= BIT(band);
1274         }
1275
1276         /* add one default STA interface if supported */
1277         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1278             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1279                 struct vif_params params = {0};
1280
1281                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1282                                           NL80211_IFTYPE_STATION, &params);
1283                 if (result)
1284                         wiphy_warn(local->hw.wiphy,
1285                                    "Failed to add default virtual iface\n");
1286         }
1287
1288         rtnl_unlock();
1289
1290 #ifdef CONFIG_INET
1291         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1292         result = register_inetaddr_notifier(&local->ifa_notifier);
1293         if (result)
1294                 goto fail_ifa;
1295 #endif
1296
1297 #if IS_ENABLED(CONFIG_IPV6)
1298         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1299         result = register_inet6addr_notifier(&local->ifa6_notifier);
1300         if (result)
1301                 goto fail_ifa6;
1302 #endif
1303
1304         return 0;
1305
1306 #if IS_ENABLED(CONFIG_IPV6)
1307  fail_ifa6:
1308 #ifdef CONFIG_INET
1309         unregister_inetaddr_notifier(&local->ifa_notifier);
1310 #endif
1311 #endif
1312 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1313  fail_ifa:
1314 #endif
1315         rtnl_lock();
1316         rate_control_deinitialize(local);
1317         ieee80211_remove_interfaces(local);
1318  fail_rate:
1319         rtnl_unlock();
1320  fail_flows:
1321         ieee80211_led_exit(local);
1322         destroy_workqueue(local->workqueue);
1323  fail_workqueue:
1324         wiphy_unregister(local->hw.wiphy);
1325  fail_wiphy_register:
1326         if (local->wiphy_ciphers_allocated)
1327                 kfree(local->hw.wiphy->cipher_suites);
1328         kfree(local->int_scan_req);
1329         return result;
1330 }
1331 EXPORT_SYMBOL(ieee80211_register_hw);
1332
1333 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1334 {
1335         struct ieee80211_local *local = hw_to_local(hw);
1336
1337         tasklet_kill(&local->tx_pending_tasklet);
1338         tasklet_kill(&local->tasklet);
1339
1340 #ifdef CONFIG_INET
1341         unregister_inetaddr_notifier(&local->ifa_notifier);
1342 #endif
1343 #if IS_ENABLED(CONFIG_IPV6)
1344         unregister_inet6addr_notifier(&local->ifa6_notifier);
1345 #endif
1346
1347         rtnl_lock();
1348
1349         /*
1350          * At this point, interface list manipulations are fine
1351          * because the driver cannot be handing us frames any
1352          * more and the tasklet is killed.
1353          */
1354         ieee80211_remove_interfaces(local);
1355
1356         rtnl_unlock();
1357
1358         cancel_delayed_work_sync(&local->roc_work);
1359         cancel_work_sync(&local->restart_work);
1360         cancel_work_sync(&local->reconfig_filter);
1361         cancel_work_sync(&local->tdls_chsw_work);
1362         flush_work(&local->sched_scan_stopped_work);
1363         flush_work(&local->radar_detected_work);
1364
1365         ieee80211_clear_tx_pending(local);
1366         rate_control_deinitialize(local);
1367
1368         if (skb_queue_len(&local->skb_queue) ||
1369             skb_queue_len(&local->skb_queue_unreliable))
1370                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1371         skb_queue_purge(&local->skb_queue);
1372         skb_queue_purge(&local->skb_queue_unreliable);
1373         skb_queue_purge(&local->skb_queue_tdls_chsw);
1374
1375         destroy_workqueue(local->workqueue);
1376         wiphy_unregister(local->hw.wiphy);
1377         ieee80211_led_exit(local);
1378         kfree(local->int_scan_req);
1379 }
1380 EXPORT_SYMBOL(ieee80211_unregister_hw);
1381
1382 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1383 {
1384         WARN_ONCE(1, "Have pending ack frames!\n");
1385         kfree_skb(p);
1386         return 0;
1387 }
1388
1389 void ieee80211_free_hw(struct ieee80211_hw *hw)
1390 {
1391         struct ieee80211_local *local = hw_to_local(hw);
1392         enum nl80211_band band;
1393
1394         mutex_destroy(&local->iflist_mtx);
1395         mutex_destroy(&local->mtx);
1396
1397         if (local->wiphy_ciphers_allocated)
1398                 kfree(local->hw.wiphy->cipher_suites);
1399
1400         idr_for_each(&local->ack_status_frames,
1401                      ieee80211_free_ack_frame, NULL);
1402         idr_destroy(&local->ack_status_frames);
1403
1404         sta_info_stop(local);
1405
1406         ieee80211_free_led_names(local);
1407
1408         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1409                 if (!(local->sband_allocated & BIT(band)))
1410                         continue;
1411                 kfree(local->hw.wiphy->bands[band]);
1412         }
1413
1414         wiphy_free(local->hw.wiphy);
1415 }
1416 EXPORT_SYMBOL(ieee80211_free_hw);
1417
1418 static int __init ieee80211_init(void)
1419 {
1420         struct sk_buff *skb;
1421         int ret;
1422
1423         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1424         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1425                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1426
1427         ret = rc80211_minstrel_init();
1428         if (ret)
1429                 return ret;
1430
1431         ret = ieee80211_iface_init();
1432         if (ret)
1433                 goto err_netdev;
1434
1435         return 0;
1436  err_netdev:
1437         rc80211_minstrel_exit();
1438
1439         return ret;
1440 }
1441
1442 static void __exit ieee80211_exit(void)
1443 {
1444         rc80211_minstrel_exit();
1445
1446         ieee80211s_stop();
1447
1448         ieee80211_iface_exit();
1449
1450         rcu_barrier();
1451 }
1452
1453
1454 subsys_initcall(ieee80211_init);
1455 module_exit(ieee80211_exit);
1456
1457 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1458 MODULE_LICENSE("GPL");