net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright (C) 2017     Intel Deutschland GmbH
   7  * Copyright (C) 2018 - 2019 Intel Corporation
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/types.h>
  19 #include <linux/slab.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/if_arp.h>
  23 #include <linux/rtnetlink.h>
  24 #include <linux/bitmap.h>
  25 #include <linux/inetdevice.h>
  26 #include <net/net_namespace.h>
  27 #include <net/cfg80211.h>
  28 #include <net/addrconf.h>
  29
  30 #include "ieee80211_i.h"
  31 #include "driver-ops.h"
  32 #include "rate.h"
  33 #include "mesh.h"
  34 #include "wep.h"
  35 #include "led.h"
  36 #include "debugfs.h"
  37
  38 void ieee80211_configure_filter(struct ieee80211_local *local)
  39 {
  40         u64 mc;
  41         unsigned int changed_flags;
  42         unsigned int new_flags = 0;
  43
  44         if (atomic_read(&local->iff_allmultis))
  45                 new_flags |= FIF_ALLMULTI;
  46
  47         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  48             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  49                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  50
  51         if (local->fif_probe_req || local->probe_req_reg)
  52                 new_flags |= FIF_PROBE_REQ;
  53
  54         if (local->fif_fcsfail)
  55                 new_flags |= FIF_FCSFAIL;
  56
  57         if (local->fif_plcpfail)
  58                 new_flags |= FIF_PLCPFAIL;
  59
  60         if (local->fif_control)
  61                 new_flags |= FIF_CONTROL;
  62
  63         if (local->fif_other_bss)
  64                 new_flags |= FIF_OTHER_BSS;
  65
  66         if (local->fif_pspoll)
  67                 new_flags |= FIF_PSPOLL;
  68
  69         spin_lock_bh(&local->filter_lock);
  70         changed_flags = local->filter_flags ^ new_flags;
  71
  72         mc = drv_prepare_multicast(local, &local->mc_list);
  73         spin_unlock_bh(&local->filter_lock);
  74
  75         /* be a bit nasty */
  76         new_flags |= (1<<31);
  77
  78         drv_configure_filter(local, changed_flags, &new_flags, mc);
  79
  80         WARN_ON(new_flags & (1<<31));
  81
  82         local->filter_flags = new_flags & ~(1<<31);
  83 }
  84
  85 static void ieee80211_reconfig_filter(struct work_struct *work)
  86 {
  87         struct ieee80211_local *local =
  88                 container_of(work, struct ieee80211_local, reconfig_filter);
  89
  90         ieee80211_configure_filter(local);
  91 }
  92
  93 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  94 {
  95         struct ieee80211_sub_if_data *sdata;
  96         struct cfg80211_chan_def chandef = {};
  97         u32 changed = 0;
  98         int power;
  99         u32 offchannel_flag;
 100
 101         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 102
 103         if (local->scan_chandef.chan) {
 104                 chandef = local->scan_chandef;
 105         } else if (local->tmp_channel) {
 106                 chandef.chan = local->tmp_channel;
 107                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 108                 chandef.center_freq1 = chandef.chan->center_freq;
 109         } else
 110                 chandef = local->_oper_chandef;
 111
 112         WARN(!cfg80211_chandef_valid(&chandef),
 113              "control:%d MHz width:%d center: %d/%d MHz",
 114              chandef.chan->center_freq, chandef.width,
 115              chandef.center_freq1, chandef.center_freq2);
 116
 117         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 118                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 119         else
 120                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 121
 122         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 123
 124         if (offchannel_flag ||
 125             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 126                                         &local->_oper_chandef)) {
 127                 local->hw.conf.chandef = chandef;
 128                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 129         }
 130
 131         if (!conf_is_ht(&local->hw.conf)) {
 132                 /*
 133                  * mac80211.h documents that this is only valid
 134                  * when the channel is set to an HT type, and
 135                  * that otherwise STATIC is used.
 136                  */
 137                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 138         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 139                 local->hw.conf.smps_mode = local->smps_mode;
 140                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 141         }
 142
 143         power = ieee80211_chandef_max_power(&chandef);
 144
 145         rcu_read_lock();
 146         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 147                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 148                         continue;
 149                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 150                         continue;
 151                 power = min(power, sdata->vif.bss_conf.txpower);
 152         }
 153         rcu_read_unlock();
 154
 155         if (local->hw.conf.power_level != power) {
 156                 changed |= IEEE80211_CONF_CHANGE_POWER;
 157                 local->hw.conf.power_level = power;
 158         }
 159
 160         return changed;
 161 }
 162
 163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 164 {
 165         int ret = 0;
 166
 167         might_sleep();
 168
 169         if (!local->use_chanctx)
 170                 changed |= ieee80211_hw_conf_chan(local);
 171         else
 172                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 173                              IEEE80211_CONF_CHANGE_POWER);
 174
 175         if (changed && local->open_count) {
 176                 ret = drv_config(local, changed);
 177                 /*
 178                  * Goal:
 179                  * HW reconfiguration should never fail, the driver has told
 180                  * us what it can support so it should live up to that promise.
 181                  *
 182                  * Current status:
 183                  * rfkill is not integrated with mac80211 and a
 184                  * configuration command can thus fail if hardware rfkill
 185                  * is enabled
 186                  *
 187                  * FIXME: integrate rfkill with mac80211 and then add this
 188                  * WARN_ON() back
 189                  *
 190                  */
 191                 /* WARN_ON(ret); */
 192         }
 193
 194         return ret;
 195 }
 196
 197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 198                                       u32 changed)
 199 {
 200         struct ieee80211_local *local = sdata->local;
 201
 202         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 203                 return;
 204
 205         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 206 }
 207
 208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 209 {
 210         sdata->vif.bss_conf.use_cts_prot = false;
 211         sdata->vif.bss_conf.use_short_preamble = false;
 212         sdata->vif.bss_conf.use_short_slot = false;
 213         return BSS_CHANGED_ERP_CTS_PROT |
 214                BSS_CHANGED_ERP_PREAMBLE |
 215                BSS_CHANGED_ERP_SLOT;
 216 }
 217
 218 static void ieee80211_tasklet_handler(unsigned long data)
 219 {
 220         struct ieee80211_local *local = (struct ieee80211_local *) data;
 221         struct sk_buff *skb;
 222
 223         while ((skb = skb_dequeue(&local->skb_queue)) ||
 224                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 225                 switch (skb->pkt_type) {
 226                 case IEEE80211_RX_MSG:
 227                         /* Clear skb->pkt_type in order to not confuse kernel
 228                          * netstack. */
 229                         skb->pkt_type = 0;
 230                         ieee80211_rx(&local->hw, skb);
 231                         break;
 232                 case IEEE80211_TX_STATUS_MSG:
 233                         skb->pkt_type = 0;
 234                         ieee80211_tx_status(&local->hw, skb);
 235                         break;
 236                 default:
 237                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 238                              skb->pkt_type);
 239                         dev_kfree_skb(skb);
 240                         break;
 241                 }
 242         }
 243 }
 244
 245 static void ieee80211_restart_work(struct work_struct *work)
 246 {
 247         struct ieee80211_local *local =
 248                 container_of(work, struct ieee80211_local, restart_work);
 249         struct ieee80211_sub_if_data *sdata;
 250
 251         /* wait for scan work complete */
 252         flush_workqueue(local->workqueue);
 253         flush_work(&local->sched_scan_stopped_work);
 254
 255         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 256              "%s called with hardware scan in progress\n", __func__);
 257
 258         flush_work(&local->radar_detected_work);
 259         rtnl_lock();
 260         list_for_each_entry(sdata, &local->interfaces, list) {
 261                 /*
 262                  * XXX: there may be more work for other vif types and even
 263                  * for station mode: a good thing would be to run most of
 264                  * the iface type's dependent _stop (ieee80211_mg_stop,
 265                  * ieee80211_ibss_stop) etc...
 266                  * For now, fix only the specific bug that was seen: race
 267                  * between csa_connection_drop_work and us.
 268                  */
 269                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 270                         /*
 271                          * This worker is scheduled from the iface worker that
 272                          * runs on mac80211's workqueue, so we can't be
 273                          * scheduling this worker after the cancel right here.
 274                          * The exception is ieee80211_chswitch_done.
 275                          * Then we can have a race...
 276                          */
 277                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 278                 }
 279                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 280         }
 281         ieee80211_scan_cancel(local);
 282
 283         /* make sure any new ROC will consider local->in_reconfig */
 284         flush_delayed_work(&local->roc_work);
 285         flush_work(&local->hw_roc_done);
 286
 287         /* wait for all packet processing to be done */
 288         synchronize_net();
 289
 290         ieee80211_reconfig(local);
 291         rtnl_unlock();
 292 }
 293
 294 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 295 {
 296         struct ieee80211_local *local = hw_to_local(hw);
 297
 298         trace_api_restart_hw(local);
 299
 300         wiphy_info(hw->wiphy,
 301                    "Hardware restart was requested\n");
 302
 303         /* use this reason, ieee80211_reconfig will unblock it */
 304         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 305                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 306                                         false);
 307
 308         /*
 309          * Stop all Rx during the reconfig. We don't want state changes
 310          * or driver callbacks while this is in progress.
 311          */
 312         local->in_reconfig = true;
 313         barrier();
 314
 315         queue_work(system_freezable_wq, &local->restart_work);
 316 }
 317 EXPORT_SYMBOL(ieee80211_restart_hw);
 318
 319 #ifdef CONFIG_INET
 320 static int ieee80211_ifa_changed(struct notifier_block *nb,
 321                                  unsigned long data, void *arg)
 322 {
 323         struct in_ifaddr *ifa = arg;
 324         struct ieee80211_local *local =
 325                 container_of(nb, struct ieee80211_local,
 326                              ifa_notifier);
 327         struct net_device *ndev = ifa->ifa_dev->dev;
 328         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 329         struct in_device *idev;
 330         struct ieee80211_sub_if_data *sdata;
 331         struct ieee80211_bss_conf *bss_conf;
 332         struct ieee80211_if_managed *ifmgd;
 333         int c = 0;
 334
 335         /* Make sure it's our interface that got changed */
 336         if (!wdev)
 337                 return NOTIFY_DONE;
 338
 339         if (wdev->wiphy != local->hw.wiphy)
 340                 return NOTIFY_DONE;
 341
 342         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 343         bss_conf = &sdata->vif.bss_conf;
 344
 345         /* ARP filtering is only supported in managed mode */
 346         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 347                 return NOTIFY_DONE;
 348
 349         idev = __in_dev_get_rtnl(sdata->dev);
 350         if (!idev)
 351                 return NOTIFY_DONE;
 352
 353         ifmgd = &sdata->u.mgd;
 354         sdata_lock(sdata);
 355
 356         /* Copy the addresses to the bss_conf list */
 357         ifa = idev->ifa_list;
 358         while (ifa) {
 359                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 360                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 361                 ifa = ifa->ifa_next;
 362                 c++;
 363         }
 364
 365         bss_conf->arp_addr_cnt = c;
 366
 367         /* Configure driver only if associated (which also implies it is up) */
 368         if (ifmgd->associated)
 369                 ieee80211_bss_info_change_notify(sdata,
 370                                                  BSS_CHANGED_ARP_FILTER);
 371
 372         sdata_unlock(sdata);
 373
 374         return NOTIFY_OK;
 375 }
 376 #endif
 377
 378 #if IS_ENABLED(CONFIG_IPV6)
 379 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 380                                   unsigned long data, void *arg)
 381 {
 382         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 383         struct inet6_dev *idev = ifa->idev;
 384         struct net_device *ndev = ifa->idev->dev;
 385         struct ieee80211_local *local =
 386                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 387         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 388         struct ieee80211_sub_if_data *sdata;
 389
 390         /* Make sure it's our interface that got changed */
 391         if (!wdev || wdev->wiphy != local->hw.wiphy)
 392                 return NOTIFY_DONE;
 393
 394         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 395
 396         /*
 397          * For now only support station mode. This is mostly because
 398          * doing AP would have to handle AP_VLAN in some way ...
 399          */
 400         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 401                 return NOTIFY_DONE;
 402
 403         drv_ipv6_addr_change(local, sdata, idev);
 404
 405         return NOTIFY_OK;
 406 }
 407 #endif
 408
 409 /* There isn't a lot of sense in it, but you can transmit anything you like */
 410 static const struct ieee80211_txrx_stypes
 411 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 412         [NL80211_IFTYPE_ADHOC] = {
 413                 .tx = 0xffff,
 414                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 415                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 416                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 417                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 418         },
 419         [NL80211_IFTYPE_STATION] = {
 420                 .tx = 0xffff,
 421                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 422                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 423         },
 424         [NL80211_IFTYPE_AP] = {
 425                 .tx = 0xffff,
 426                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 427                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 428                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 429                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 430                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 431                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 432                         BIT(IEEE80211_STYPE_ACTION >> 4),
 433         },
 434         [NL80211_IFTYPE_AP_VLAN] = {
 435                 /* copy AP */
 436                 .tx = 0xffff,
 437                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 438                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 439                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 440                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 441                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 442                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 443                         BIT(IEEE80211_STYPE_ACTION >> 4),
 444         },
 445         [NL80211_IFTYPE_P2P_CLIENT] = {
 446                 .tx = 0xffff,
 447                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 448                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 449         },
 450         [NL80211_IFTYPE_P2P_GO] = {
 451                 .tx = 0xffff,
 452                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 453                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 454                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 455                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 456                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 457                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 458                         BIT(IEEE80211_STYPE_ACTION >> 4),
 459         },
 460         [NL80211_IFTYPE_MESH_POINT] = {
 461                 .tx = 0xffff,
 462                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 463                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 464                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 465         },
 466         [NL80211_IFTYPE_P2P_DEVICE] = {
 467                 .tx = 0xffff,
 468                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 469                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 470         },
 471 };
 472
 473 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 474         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 475                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 476
 477         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 478                                 IEEE80211_HT_CAP_MAX_AMSDU |
 479                                 IEEE80211_HT_CAP_SGI_20 |
 480                                 IEEE80211_HT_CAP_SGI_40 |
 481                                 IEEE80211_HT_CAP_TX_STBC |
 482                                 IEEE80211_HT_CAP_RX_STBC |
 483                                 IEEE80211_HT_CAP_LDPC_CODING |
 484                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 485         .mcs = {
 486                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 487                              0xff, 0xff, 0xff, 0xff, 0xff, },
 488         },
 489 };
 490
 491 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 492         .vht_cap_info =
 493                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 494                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 495                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 496                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 497                             IEEE80211_VHT_CAP_TXSTBC |
 498                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 499                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 500                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 501                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 502                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 503         .supp_mcs = {
 504                 .rx_mcs_map = cpu_to_le16(~0),
 505                 .tx_mcs_map = cpu_to_le16(~0),
 506         },
 507 };
 508
 509 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 510                                            const struct ieee80211_ops *ops,
 511                                            const char *requested_name)
 512 {
 513         struct ieee80211_local *local;
 514         int priv_size, i;
 515         struct wiphy *wiphy;
 516         bool use_chanctx;
 517
 518         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 519                     !ops->add_interface || !ops->remove_interface ||
 520                     !ops->configure_filter))
 521                 return NULL;
 522
 523         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 524                 return NULL;
 525
 526         /* check all or no channel context operations exist */
 527         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 528             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 529             !!ops->unassign_vif_chanctx;
 530         if (WARN_ON(i != 0 && i != 5))
 531                 return NULL;
 532         use_chanctx = i == 5;
 533
 534         /* Ensure 32-byte alignment of our private data and hw private data.
 535          * We use the wiphy priv data for both our ieee80211_local and for
 536          * the driver's private data
 537          *
 538          * In memory it'll be like this:
 539          *
 540          * +-------------------------+
 541          * | struct wiphy           |
 542          * +-------------------------+
 543          * | struct ieee80211_local  |
 544          * +-------------------------+
 545          * | driver's private data   |
 546          * +-------------------------+
 547          *
 548          */
 549         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 550
 551         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 552
 553         if (!wiphy)
 554                 return NULL;
 555
 556         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 557
 558         wiphy->privid = mac80211_wiphy_privid;
 559
 560         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 561                         WIPHY_FLAG_4ADDR_AP |
 562                         WIPHY_FLAG_4ADDR_STATION |
 563                         WIPHY_FLAG_REPORTS_OBSS |
 564                         WIPHY_FLAG_OFFCHAN_TX;
 565
 566         if (ops->remain_on_channel)
 567                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 568
 569         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 570                            NL80211_FEATURE_SAE |
 571                            NL80211_FEATURE_HT_IBSS |
 572                            NL80211_FEATURE_VIF_TXPOWER |
 573                            NL80211_FEATURE_MAC_ON_CREATE |
 574                            NL80211_FEATURE_USERSPACE_MPM |
 575                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 576         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 577         wiphy_ext_feature_set(wiphy,
 578                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 579
 580         if (!ops->hw_scan) {
 581                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 582                                    NL80211_FEATURE_AP_SCAN;
 583                 /*
 584                  * if the driver behaves correctly using the probe request
 585                  * (template) from mac80211, then both of these should be
 586                  * supported even with hw scan - but let drivers opt in.
 587                  */
 588                 wiphy_ext_feature_set(wiphy,
 589                                       NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
 590                 wiphy_ext_feature_set(wiphy,
 591                                       NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
 592         }
 593
 594         if (!ops->set_key)
 595                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 596
 597         if (ops->wake_tx_queue)
 598                 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
 599
 600         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 601
 602         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 603
 604         local = wiphy_priv(wiphy);
 605
 606         if (sta_info_init(local))
 607                 goto err_free;
 608
 609         local->hw.wiphy = wiphy;
 610
 611         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 612
 613         local->ops = ops;
 614         local->use_chanctx = use_chanctx;
 615
 616         /*
 617          * We need a bit of data queued to build aggregates properly, so
 618          * instruct the TCP stack to allow more than a single ms of data
 619          * to be queued in the stack. The value is a bit-shift of 1
 620          * second, so 7 is ~8ms of queued data. Only affects local TCP
 621          * sockets.
 622          * This is the default, anyhow - drivers may need to override it
 623          * for local reasons (longer buffers, longer completion time, or
 624          * similar).
 625          */
 626         local->hw.tx_sk_pacing_shift = 7;
 627
 628         /* set up some defaults */
 629         local->hw.queues = 1;
 630         local->hw.max_rates = 1;
 631         local->hw.max_report_rates = 0;
 632         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 633         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
 634         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 635         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 636         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 637         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 638                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 639                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 640         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 641                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 642         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 643         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 644         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 645         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 646         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 647
 648         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 649
 650         wiphy->extended_capabilities = local->ext_capa;
 651         wiphy->extended_capabilities_mask = local->ext_capa;
 652         wiphy->extended_capabilities_len =
 653                 ARRAY_SIZE(local->ext_capa);
 654
 655         INIT_LIST_HEAD(&local->interfaces);
 656         INIT_LIST_HEAD(&local->mon_list);
 657
 658         __hw_addr_init(&local->mc_list);
 659
 660         mutex_init(&local->iflist_mtx);
 661         mutex_init(&local->mtx);
 662
 663         mutex_init(&local->key_mtx);
 664         spin_lock_init(&local->filter_lock);
 665         spin_lock_init(&local->rx_path_lock);
 666         spin_lock_init(&local->queue_stop_reason_lock);
 667
 668         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 669                 INIT_LIST_HEAD(&local->active_txqs[i]);
 670                 spin_lock_init(&local->active_txq_lock[i]);
 671         }
 672         local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
 673
 674         INIT_LIST_HEAD(&local->chanctx_list);
 675         mutex_init(&local->chanctx_mtx);
 676
 677         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 678
 679         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 680
 681         INIT_WORK(&local->radar_detected_work,
 682                   ieee80211_dfs_radar_detected_work);
 683
 684         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 685         local->smps_mode = IEEE80211_SMPS_OFF;
 686
 687         INIT_WORK(&local->dynamic_ps_enable_work,
 688                   ieee80211_dynamic_ps_enable_work);
 689         INIT_WORK(&local->dynamic_ps_disable_work,
 690                   ieee80211_dynamic_ps_disable_work);
 691         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 692
 693         INIT_WORK(&local->sched_scan_stopped_work,
 694                   ieee80211_sched_scan_stopped_work);
 695
 696         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 697
 698         spin_lock_init(&local->ack_status_lock);
 699         idr_init(&local->ack_status_frames);
 700
 701         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 702                 skb_queue_head_init(&local->pending[i]);
 703                 atomic_set(&local->agg_queue_stop[i], 0);
 704         }
 705         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 706                      (unsigned long)local);
 707
 708         if (ops->wake_tx_queue)
 709                 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
 710                              (unsigned long)local);
 711
 712         tasklet_init(&local->tasklet,
 713                      ieee80211_tasklet_handler,
 714                      (unsigned long) local);
 715
 716         skb_queue_head_init(&local->skb_queue);
 717         skb_queue_head_init(&local->skb_queue_unreliable);
 718         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 719
 720         ieee80211_alloc_led_names(local);
 721
 722         ieee80211_roc_setup(local);
 723
 724         local->hw.radiotap_timestamp.units_pos = -1;
 725         local->hw.radiotap_timestamp.accuracy = -1;
 726
 727         return &local->hw;
 728  err_free:
 729         wiphy_free(wiphy);
 730         return NULL;
 731 }
 732 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 733
 734 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 735 {
 736         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 737                           IS_ERR(local->wep_rx_tfm));
 738         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 739         int n_suites = 0, r = 0, w = 0;
 740         u32 *suites;
 741         static const u32 cipher_suites[] = {
 742                 /* keep WEP first, it may be removed below */
 743                 WLAN_CIPHER_SUITE_WEP40,
 744                 WLAN_CIPHER_SUITE_WEP104,
 745                 WLAN_CIPHER_SUITE_TKIP,
 746                 WLAN_CIPHER_SUITE_CCMP,
 747                 WLAN_CIPHER_SUITE_CCMP_256,
 748                 WLAN_CIPHER_SUITE_GCMP,
 749                 WLAN_CIPHER_SUITE_GCMP_256,
 750
 751                 /* keep last -- depends on hw flags! */
 752                 WLAN_CIPHER_SUITE_AES_CMAC,
 753                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 754                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 755                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 756         };
 757
 758         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 759             local->hw.wiphy->cipher_suites) {
 760                 /* If the driver advertises, or doesn't support SW crypto,
 761                  * we only need to remove WEP if necessary.
 762                  */
 763                 if (have_wep)
 764                         return 0;
 765
 766                 /* well if it has _no_ ciphers ... fine */
 767                 if (!local->hw.wiphy->n_cipher_suites)
 768                         return 0;
 769
 770                 /* Driver provides cipher suites, but we need to exclude WEP */
 771                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 772                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 773                                  GFP_KERNEL);
 774                 if (!suites)
 775                         return -ENOMEM;
 776
 777                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 778                         u32 suite = local->hw.wiphy->cipher_suites[r];
 779
 780                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 781                             suite == WLAN_CIPHER_SUITE_WEP104)
 782                                 continue;
 783                         suites[w++] = suite;
 784                 }
 785         } else if (!local->hw.cipher_schemes) {
 786                 /* If the driver doesn't have cipher schemes, there's nothing
 787                  * else to do other than assign the (software supported and
 788                  * perhaps offloaded) cipher suites.
 789                  */
 790                 local->hw.wiphy->cipher_suites = cipher_suites;
 791                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 792
 793                 if (!have_mfp)
 794                         local->hw.wiphy->n_cipher_suites -= 4;
 795
 796                 if (!have_wep) {
 797                         local->hw.wiphy->cipher_suites += 2;
 798                         local->hw.wiphy->n_cipher_suites -= 2;
 799                 }
 800
 801                 /* not dynamically allocated, so just return */
 802                 return 0;
 803         } else {
 804                 const struct ieee80211_cipher_scheme *cs;
 805
 806                 cs = local->hw.cipher_schemes;
 807
 808                 /* Driver specifies cipher schemes only (but not cipher suites
 809                  * including the schemes)
 810                  *
 811                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 812                  * CCMP-256, GCMP, and GCMP-256
 813                  */
 814                 n_suites = local->hw.n_cipher_schemes + 5;
 815
 816                 /* check if we have WEP40 and WEP104 */
 817                 if (have_wep)
 818                         n_suites += 2;
 819
 820                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 821                  * BIP-GMAC-256
 822                  */
 823                 if (have_mfp)
 824                         n_suites += 4;
 825
 826                 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
 827                 if (!suites)
 828                         return -ENOMEM;
 829
 830                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 831                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 832                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 833                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 834                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 835
 836                 if (have_wep) {
 837                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 838                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 839                 }
 840
 841                 if (have_mfp) {
 842                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 843                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 844                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 845                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 846                 }
 847
 848                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 849                         suites[w++] = cs[r].cipher;
 850                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 851                                 kfree(suites);
 852                                 return -EINVAL;
 853                         }
 854                 }
 855         }
 856
 857         local->hw.wiphy->cipher_suites = suites;
 858         local->hw.wiphy->n_cipher_suites = w;
 859         local->wiphy_ciphers_allocated = true;
 860
 861         return 0;
 862 }
 863
 864 int ieee80211_register_hw(struct ieee80211_hw *hw)
 865 {
 866         struct ieee80211_local *local = hw_to_local(hw);
 867         int result, i;
 868         enum nl80211_band band;
 869         int channels, max_bitrates;
 870         bool supp_ht, supp_vht, supp_he;
 871         netdev_features_t feature_whitelist;
 872         struct cfg80211_chan_def dflt_chandef = {};
 873
 874         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 875             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 876              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 877                 return -EINVAL;
 878
 879         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 880             (!local->ops->tdls_channel_switch ||
 881              !local->ops->tdls_cancel_channel_switch ||
 882              !local->ops->tdls_recv_channel_switch))
 883                 return -EOPNOTSUPP;
 884
 885         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 886                     !local->ops->set_frag_threshold))
 887                 return -EINVAL;
 888
 889         if (WARN_ON(local->hw.wiphy->interface_modes &
 890                         BIT(NL80211_IFTYPE_NAN) &&
 891                     (!local->ops->start_nan || !local->ops->stop_nan)))
 892                 return -EINVAL;
 893
 894 #ifdef CONFIG_PM
 895         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 896                 return -EINVAL;
 897 #endif
 898
 899         if (!local->use_chanctx) {
 900                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 901                         const struct ieee80211_iface_combination *comb;
 902
 903                         comb = &local->hw.wiphy->iface_combinations[i];
 904
 905                         if (comb->num_different_channels > 1)
 906                                 return -EINVAL;
 907                 }
 908         } else {
 909                 /*
 910                  * WDS is currently prohibited when channel contexts are used
 911                  * because there's no clear definition of which channel WDS
 912                  * type interfaces use
 913                  */
 914                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 915                         return -EINVAL;
 916
 917                 /* DFS is not supported with multi-channel combinations yet */
 918                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 919                         const struct ieee80211_iface_combination *comb;
 920
 921                         comb = &local->hw.wiphy->iface_combinations[i];
 922
 923                         if (comb->radar_detect_widths &&
 924                             comb->num_different_channels > 1)
 925                                 return -EINVAL;
 926                 }
 927         }
 928
 929         /* Only HW csum features are currently compatible with mac80211 */
 930         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 931                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 932                             NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
 933         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 934                 return -EINVAL;
 935
 936         if (hw->max_report_rates == 0)
 937                 hw->max_report_rates = hw->max_rates;
 938
 939         local->rx_chains = 1;
 940
 941         /*
 942          * generic code guarantees at least one band,
 943          * set this very early because much code assumes
 944          * that hw.conf.channel is assigned
 945          */
 946         channels = 0;
 947         max_bitrates = 0;
 948         supp_ht = false;
 949         supp_vht = false;
 950         supp_he = false;
 951         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 952                 struct ieee80211_supported_band *sband;
 953
 954                 sband = local->hw.wiphy->bands[band];
 955                 if (!sband)
 956                         continue;
 957
 958                 if (!dflt_chandef.chan) {
 959                         cfg80211_chandef_create(&dflt_chandef,
 960                                                 &sband->channels[0],
 961                                                 NL80211_CHAN_NO_HT);
 962                         /* init channel we're on */
 963                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 964                                 local->hw.conf.chandef = dflt_chandef;
 965                                 local->_oper_chandef = dflt_chandef;
 966                         }
 967                         local->monitor_chandef = dflt_chandef;
 968                 }
 969
 970                 channels += sband->n_channels;
 971
 972                 if (max_bitrates < sband->n_bitrates)
 973                         max_bitrates = sband->n_bitrates;
 974                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 975                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 976
 977                 if (!supp_he)
 978                         supp_he = !!ieee80211_get_he_sta_cap(sband);
 979
 980                 if (!sband->ht_cap.ht_supported)
 981                         continue;
 982
 983                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 984                 local->rx_chains =
 985                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 986                             local->rx_chains);
 987
 988                 /* no need to mask, SM_PS_DISABLED has all bits set */
 989                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 990                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
 991         }
 992
 993         /* if low-level driver supports AP, we also support VLAN.
 994          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
 995          * based on their support to transmit SW encrypted packets.
 996          */
 997         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
 998             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
 999                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1000                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1001         }
1002
1003         /* mac80211 always supports monitor */
1004         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1005         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1006
1007         /* mac80211 doesn't support more than one IBSS interface right now */
1008         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1009                 const struct ieee80211_iface_combination *c;
1010                 int j;
1011
1012                 c = &hw->wiphy->iface_combinations[i];
1013
1014                 for (j = 0; j < c->n_limits; j++)
1015                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1016                             c->limits[j].max > 1)
1017                                 return -EINVAL;
1018         }
1019
1020         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1021                                       sizeof(void *) * channels, GFP_KERNEL);
1022         if (!local->int_scan_req)
1023                 return -ENOMEM;
1024
1025         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1026                 if (!local->hw.wiphy->bands[band])
1027                         continue;
1028                 local->int_scan_req->rates[band] = (u32) -1;
1029         }
1030
1031 #ifndef CONFIG_MAC80211_MESH
1032         /* mesh depends on Kconfig, but drivers should set it if they want */
1033         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1034 #endif
1035
1036         /* if the underlying driver supports mesh, mac80211 will (at least)
1037          * provide routing of mesh authentication frames to userspace */
1038         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1039                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1040
1041         /* mac80211 supports control port protocol changing */
1042         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1043
1044         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1045                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1046         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1047                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1048                 if (hw->max_signal <= 0) {
1049                         result = -EINVAL;
1050                         goto fail_wiphy_register;
1051                 }
1052         }
1053
1054         /* Enable Extended Key IDs when driver allowed it, or when it
1055          * supports neither HW crypto nor A-MPDUs
1056          */
1057         if ((!local->ops->set_key &&
1058              !ieee80211_hw_check(hw, AMPDU_AGGREGATION)) ||
1059             ieee80211_hw_check(&local->hw, EXT_KEY_ID_NATIVE))
1060                 wiphy_ext_feature_set(local->hw.wiphy,
1061                                       NL80211_EXT_FEATURE_EXT_KEY_ID);
1062
1063         /* Mac80211 and therefore all cards only using SW crypto are able to
1064          * handle PTK rekeys correctly
1065          */
1066         if (!local->ops->set_key)
1067                 wiphy_ext_feature_set(local->hw.wiphy,
1068                                       NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1069
1070         /*
1071          * Calculate scan IE length -- we need this to alloc
1072          * memory and to subtract from the driver limit. It
1073          * includes the DS Params, (extended) supported rates, and HT
1074          * information -- SSID is the driver's responsibility.
1075          */
1076         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1077                 3 /* DS Params */;
1078         if (supp_ht)
1079                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1080
1081         if (supp_vht)
1082                 local->scan_ies_len +=
1083                         2 + sizeof(struct ieee80211_vht_cap);
1084
1085         /* HE cap element is variable in size - set len to allow max size */
1086         /*
1087          * TODO: 1 is added at the end of the calculation to accommodate for
1088          *      the temporary placing of the HE capabilities IE under EXT.
1089          *      Remove it once it is placed in the final place.
1090          */
1091         if (supp_he)
1092                 local->scan_ies_len +=
1093                         2 + sizeof(struct ieee80211_he_cap_elem) +
1094                         sizeof(struct ieee80211_he_mcs_nss_supp) +
1095                         IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1096
1097         if (!local->ops->hw_scan) {
1098                 /* For hw_scan, driver needs to set these up. */
1099                 local->hw.wiphy->max_scan_ssids = 4;
1100                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1101         }
1102
1103         /*
1104          * If the driver supports any scan IEs, then assume the
1105          * limit includes the IEs mac80211 will add, otherwise
1106          * leave it at zero and let the driver sort it out; we
1107          * still pass our IEs to the driver but userspace will
1108          * not be allowed to in that case.
1109          */
1110         if (local->hw.wiphy->max_scan_ie_len)
1111                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1112
1113         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1114                                          local->hw.n_cipher_schemes));
1115
1116         result = ieee80211_init_cipher_suites(local);
1117         if (result < 0)
1118                 goto fail_wiphy_register;
1119
1120         if (!local->ops->remain_on_channel)
1121                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1122
1123         /* mac80211 based drivers don't support internal TDLS setup */
1124         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1125                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1126
1127         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1128         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1129                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1130
1131         /* mac80211 supports multi BSSID, if the driver supports it */
1132         if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1133                 local->hw.wiphy->support_mbssid = true;
1134                 if (ieee80211_hw_check(&local->hw,
1135                                        SUPPORTS_ONLY_HE_MULTI_BSSID))
1136                         local->hw.wiphy->support_only_he_mbssid = true;
1137                 else
1138                         local->ext_capa[2] |=
1139                                 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1140         }
1141
1142         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1143
1144         result = wiphy_register(local->hw.wiphy);
1145         if (result < 0)
1146                 goto fail_wiphy_register;
1147
1148         /*
1149          * We use the number of queues for feature tests (QoS, HT) internally
1150          * so restrict them appropriately.
1151          */
1152         if (hw->queues > IEEE80211_MAX_QUEUES)
1153                 hw->queues = IEEE80211_MAX_QUEUES;
1154
1155         local->workqueue =
1156                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1157         if (!local->workqueue) {
1158                 result = -ENOMEM;
1159                 goto fail_workqueue;
1160         }
1161
1162         /*
1163          * The hardware needs headroom for sending the frame,
1164          * and we need some headroom for passing the frame to monitor
1165          * interfaces, but never both at the same time.
1166          */
1167         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1168                                    IEEE80211_TX_STATUS_HEADROOM);
1169
1170         debugfs_hw_add(local);
1171
1172         /*
1173          * if the driver doesn't specify a max listen interval we
1174          * use 5 which should be a safe default
1175          */
1176         if (local->hw.max_listen_interval == 0)
1177                 local->hw.max_listen_interval = 5;
1178
1179         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1180
1181         local->dynamic_ps_forced_timeout = -1;
1182
1183         if (!local->hw.max_nan_de_entries)
1184                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1185
1186         if (!local->hw.weight_multiplier)
1187                 local->hw.weight_multiplier = 1;
1188
1189         result = ieee80211_wep_init(local);
1190         if (result < 0)
1191                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1192                             result);
1193
1194         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1195
1196         ieee80211_led_init(local);
1197
1198         result = ieee80211_txq_setup_flows(local);
1199         if (result)
1200                 goto fail_flows;
1201
1202         rtnl_lock();
1203
1204         result = ieee80211_init_rate_ctrl_alg(local,
1205                                               hw->rate_control_algorithm);
1206         if (result < 0) {
1207                 wiphy_debug(local->hw.wiphy,
1208                             "Failed to initialize rate control algorithm\n");
1209                 goto fail_rate;
1210         }
1211
1212         if (local->rate_ctrl) {
1213                 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1214                 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1215                         ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1216         }
1217
1218         /*
1219          * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1220          * or have it when we don't, copy the sband structure and set/clear it.
1221          * This is necessary because rate scaling algorithms could be switched
1222          * and have different support values.
1223          * Print a message so that in the common case the reallocation can be
1224          * avoided.
1225          */
1226         BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1227         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1228                 struct ieee80211_supported_band *sband;
1229                 bool local_cap, ie_cap;
1230
1231                 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1232
1233                 sband = local->hw.wiphy->bands[band];
1234                 if (!sband || !sband->vht_cap.vht_supported)
1235                         continue;
1236
1237                 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1238                             cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1239
1240                 if (local_cap == ie_cap)
1241                         continue;
1242
1243                 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1244                 if (!sband) {
1245                         result = -ENOMEM;
1246                         goto fail_rate;
1247                 }
1248
1249                 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1250                           band);
1251
1252                 sband->vht_cap.vht_mcs.tx_highest ^=
1253                         cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1254
1255                 local->hw.wiphy->bands[band] = sband;
1256                 local->sband_allocated |= BIT(band);
1257         }
1258
1259         /* add one default STA interface if supported */
1260         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1261             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1262                 struct vif_params params = {0};
1263
1264                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1265                                           NL80211_IFTYPE_STATION, &params);
1266                 if (result)
1267                         wiphy_warn(local->hw.wiphy,
1268                                    "Failed to add default virtual iface\n");
1269         }
1270
1271         rtnl_unlock();
1272
1273 #ifdef CONFIG_INET
1274         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1275         result = register_inetaddr_notifier(&local->ifa_notifier);
1276         if (result)
1277                 goto fail_ifa;
1278 #endif
1279
1280 #if IS_ENABLED(CONFIG_IPV6)
1281         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1282         result = register_inet6addr_notifier(&local->ifa6_notifier);
1283         if (result)
1284                 goto fail_ifa6;
1285 #endif
1286
1287         return 0;
1288
1289 #if IS_ENABLED(CONFIG_IPV6)
1290  fail_ifa6:
1291 #ifdef CONFIG_INET
1292         unregister_inetaddr_notifier(&local->ifa_notifier);
1293 #endif
1294 #endif
1295 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1296  fail_ifa:
1297 #endif
1298         rtnl_lock();
1299         rate_control_deinitialize(local);
1300         ieee80211_remove_interfaces(local);
1301  fail_rate:
1302         rtnl_unlock();
1303         ieee80211_led_exit(local);
1304         ieee80211_wep_free(local);
1305  fail_flows:
1306         destroy_workqueue(local->workqueue);
1307  fail_workqueue:
1308         wiphy_unregister(local->hw.wiphy);
1309  fail_wiphy_register:
1310         if (local->wiphy_ciphers_allocated)
1311                 kfree(local->hw.wiphy->cipher_suites);
1312         kfree(local->int_scan_req);
1313         return result;
1314 }
1315 EXPORT_SYMBOL(ieee80211_register_hw);
1316
1317 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1318 {
1319         struct ieee80211_local *local = hw_to_local(hw);
1320
1321         tasklet_kill(&local->tx_pending_tasklet);
1322         tasklet_kill(&local->tasklet);
1323
1324 #ifdef CONFIG_INET
1325         unregister_inetaddr_notifier(&local->ifa_notifier);
1326 #endif
1327 #if IS_ENABLED(CONFIG_IPV6)
1328         unregister_inet6addr_notifier(&local->ifa6_notifier);
1329 #endif
1330
1331         rtnl_lock();
1332
1333         /*
1334          * At this point, interface list manipulations are fine
1335          * because the driver cannot be handing us frames any
1336          * more and the tasklet is killed.
1337          */
1338         ieee80211_remove_interfaces(local);
1339
1340         rtnl_unlock();
1341
1342         cancel_delayed_work_sync(&local->roc_work);
1343         cancel_work_sync(&local->restart_work);
1344         cancel_work_sync(&local->reconfig_filter);
1345         cancel_work_sync(&local->tdls_chsw_work);
1346         flush_work(&local->sched_scan_stopped_work);
1347         flush_work(&local->radar_detected_work);
1348
1349         ieee80211_clear_tx_pending(local);
1350         rate_control_deinitialize(local);
1351
1352         if (skb_queue_len(&local->skb_queue) ||
1353             skb_queue_len(&local->skb_queue_unreliable))
1354                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1355         skb_queue_purge(&local->skb_queue);
1356         skb_queue_purge(&local->skb_queue_unreliable);
1357         skb_queue_purge(&local->skb_queue_tdls_chsw);
1358
1359         destroy_workqueue(local->workqueue);
1360         wiphy_unregister(local->hw.wiphy);
1361         ieee80211_wep_free(local);
1362         ieee80211_led_exit(local);
1363         kfree(local->int_scan_req);
1364 }
1365 EXPORT_SYMBOL(ieee80211_unregister_hw);
1366
1367 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1368 {
1369         WARN_ONCE(1, "Have pending ack frames!\n");
1370         kfree_skb(p);
1371         return 0;
1372 }
1373
1374 void ieee80211_free_hw(struct ieee80211_hw *hw)
1375 {
1376         struct ieee80211_local *local = hw_to_local(hw);
1377         enum nl80211_band band;
1378
1379         mutex_destroy(&local->iflist_mtx);
1380         mutex_destroy(&local->mtx);
1381
1382         if (local->wiphy_ciphers_allocated)
1383                 kfree(local->hw.wiphy->cipher_suites);
1384
1385         idr_for_each(&local->ack_status_frames,
1386                      ieee80211_free_ack_frame, NULL);
1387         idr_destroy(&local->ack_status_frames);
1388
1389         sta_info_stop(local);
1390
1391         ieee80211_free_led_names(local);
1392
1393         for (band = 0; band < NUM_NL80211_BANDS; band++) {
1394                 if (!(local->sband_allocated & BIT(band)))
1395                         continue;
1396                 kfree(local->hw.wiphy->bands[band]);
1397         }
1398
1399         wiphy_free(local->hw.wiphy);
1400 }
1401 EXPORT_SYMBOL(ieee80211_free_hw);
1402
1403 static int __init ieee80211_init(void)
1404 {
1405         struct sk_buff *skb;
1406         int ret;
1407
1408         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1409         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1410                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1411
1412         ret = rc80211_minstrel_init();
1413         if (ret)
1414                 return ret;
1415
1416         ret = ieee80211_iface_init();
1417         if (ret)
1418                 goto err_netdev;
1419
1420         return 0;
1421  err_netdev:
1422         rc80211_minstrel_exit();
1423
1424         return ret;
1425 }
1426
1427 static void __exit ieee80211_exit(void)
1428 {
1429         rc80211_minstrel_exit();
1430
1431         ieee80211s_stop();
1432
1433         ieee80211_iface_exit();
1434
1435         rcu_barrier();
1436 }
1437
1438
1439 subsys_initcall(ieee80211_init);
1440 module_exit(ieee80211_exit);
1441
1442 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1443 MODULE_LICENSE("GPL");