git.oblomov.eu Git - linux-2.6/blob - 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  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26
  27 #include "ieee80211_i.h"
  28 #include "rate.h"
  29 #include "mesh.h"
  30 #include "wep.h"
  31 #include "wme.h"
  32 #include "aes_ccm.h"
  33 #include "led.h"
  34 #include "cfg.h"
  35 #include "debugfs.h"
  36 #include "debugfs_netdev.h"
  37
  38 /*
  39  * For seeing transmitted packets on monitor interfaces
  40  * we have a radiotap header too.
  41  */
  42 struct ieee80211_tx_status_rtap_hdr {
  43         struct ieee80211_radiotap_header hdr;
  44         __le16 tx_flags;
  45         u8 data_retries;
  46 } __attribute__ ((packed));
  47
  48 /* common interface routines */
  49
  50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
  51 {
  52         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  53         return ETH_ALEN;
  54 }
  55
  56 /* must be called under mdev tx lock */
  57 static void ieee80211_configure_filter(struct ieee80211_local *local)
  58 {
  59         unsigned int changed_flags;
  60         unsigned int new_flags = 0;
  61
  62         if (atomic_read(&local->iff_promiscs))
  63                 new_flags |= FIF_PROMISC_IN_BSS;
  64
  65         if (atomic_read(&local->iff_allmultis))
  66                 new_flags |= FIF_ALLMULTI;
  67
  68         if (local->monitors)
  69                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  70
  71         if (local->fif_fcsfail)
  72                 new_flags |= FIF_FCSFAIL;
  73
  74         if (local->fif_plcpfail)
  75                 new_flags |= FIF_PLCPFAIL;
  76
  77         if (local->fif_control)
  78                 new_flags |= FIF_CONTROL;
  79
  80         if (local->fif_other_bss)
  81                 new_flags |= FIF_OTHER_BSS;
  82
  83         changed_flags = local->filter_flags ^ new_flags;
  84
  85         /* be a bit nasty */
  86         new_flags |= (1<<31);
  87
  88         local->ops->configure_filter(local_to_hw(local),
  89                                      changed_flags, &new_flags,
  90                                      local->mdev->mc_count,
  91                                      local->mdev->mc_list);
  92
  93         WARN_ON(new_flags & (1<<31));
  94
  95         local->filter_flags = new_flags & ~(1<<31);
  96 }
  97
  98 /* master interface */
  99
 100 static int ieee80211_master_open(struct net_device *dev)
 101 {
 102         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 103         struct ieee80211_sub_if_data *sdata;
 104         int res = -EOPNOTSUPP;
 105
 106         /* we hold the RTNL here so can safely walk the list */
 107         list_for_each_entry(sdata, &local->interfaces, list) {
 108                 if (netif_running(sdata->dev)) {
 109                         res = 0;
 110                         break;
 111                 }
 112         }
 113
 114         if (res)
 115                 return res;
 116
 117         netif_tx_start_all_queues(local->mdev);
 118
 119         return 0;
 120 }
 121
 122 static int ieee80211_master_stop(struct net_device *dev)
 123 {
 124         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 125         struct ieee80211_sub_if_data *sdata;
 126
 127         /* we hold the RTNL here so can safely walk the list */
 128         list_for_each_entry(sdata, &local->interfaces, list)
 129                 if (netif_running(sdata->dev))
 130                         dev_close(sdata->dev);
 131
 132         return 0;
 133 }
 134
 135 static void ieee80211_master_set_multicast_list(struct net_device *dev)
 136 {
 137         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 138
 139         ieee80211_configure_filter(local);
 140 }
 141
 142 /* regular interfaces */
 143
 144 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 145 {
 146         int meshhdrlen;
 147         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 148
 149         meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
 150
 151         /* FIX: what would be proper limits for MTU?
 152          * This interface uses 802.3 frames. */
 153         if (new_mtu < 256 ||
 154             new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
 155                 return -EINVAL;
 156         }
 157
 158 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 159         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 160 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 161         dev->mtu = new_mtu;
 162         return 0;
 163 }
 164
 165 static inline int identical_mac_addr_allowed(int type1, int type2)
 166 {
 167         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 168                 type2 == IEEE80211_IF_TYPE_MNTR ||
 169                 (type1 == IEEE80211_IF_TYPE_AP &&
 170                  type2 == IEEE80211_IF_TYPE_WDS) ||
 171                 (type1 == IEEE80211_IF_TYPE_WDS &&
 172                  (type2 == IEEE80211_IF_TYPE_WDS ||
 173                   type2 == IEEE80211_IF_TYPE_AP)) ||
 174                 (type1 == IEEE80211_IF_TYPE_AP &&
 175                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 176                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 177                  (type2 == IEEE80211_IF_TYPE_AP ||
 178                   type2 == IEEE80211_IF_TYPE_VLAN)));
 179 }
 180
 181 static int ieee80211_open(struct net_device *dev)
 182 {
 183         struct ieee80211_sub_if_data *sdata, *nsdata;
 184         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 185         struct sta_info *sta;
 186         struct ieee80211_if_init_conf conf;
 187         u32 changed = 0;
 188         int res;
 189         bool need_hw_reconfig = 0;
 190
 191         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 192
 193         /* we hold the RTNL here so can safely walk the list */
 194         list_for_each_entry(nsdata, &local->interfaces, list) {
 195                 struct net_device *ndev = nsdata->dev;
 196
 197                 if (ndev != dev && netif_running(ndev)) {
 198                         /*
 199                          * Allow only a single IBSS interface to be up at any
 200                          * time. This is restricted because beacon distribution
 201                          * cannot work properly if both are in the same IBSS.
 202                          *
 203                          * To remove this restriction we'd have to disallow them
 204                          * from setting the same SSID on different IBSS interfaces
 205                          * belonging to the same hardware. Then, however, we're
 206                          * faced with having to adopt two different TSF timers...
 207                          */
 208                         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
 209                             nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
 210                                 return -EBUSY;
 211
 212                         /*
 213                          * The remaining checks are only performed for interfaces
 214                          * with the same MAC address.
 215                          */
 216                         if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
 217                                 continue;
 218
 219                         /*
 220                          * check whether it may have the same address
 221                          */
 222                         if (!identical_mac_addr_allowed(sdata->vif.type,
 223                                                         nsdata->vif.type))
 224                                 return -ENOTUNIQ;
 225
 226                         /*
 227                          * can only add VLANs to enabled APs
 228                          */
 229                         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
 230                             nsdata->vif.type == IEEE80211_IF_TYPE_AP)
 231                                 sdata->bss = &nsdata->u.ap;
 232                 }
 233         }
 234
 235         switch (sdata->vif.type) {
 236         case IEEE80211_IF_TYPE_WDS:
 237                 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
 238                         return -ENOLINK;
 239                 break;
 240         case IEEE80211_IF_TYPE_VLAN:
 241                 if (!sdata->bss)
 242                         return -ENOLINK;
 243                 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
 244                 break;
 245         case IEEE80211_IF_TYPE_AP:
 246                 sdata->bss = &sdata->u.ap;
 247                 break;
 248         case IEEE80211_IF_TYPE_MESH_POINT:
 249                 /* mesh ifaces must set allmulti to forward mcast traffic */
 250                 atomic_inc(&local->iff_allmultis);
 251                 break;
 252         case IEEE80211_IF_TYPE_STA:
 253         case IEEE80211_IF_TYPE_MNTR:
 254         case IEEE80211_IF_TYPE_IBSS:
 255                 /* no special treatment */
 256                 break;
 257         case IEEE80211_IF_TYPE_INVALID:
 258                 /* cannot happen */
 259                 WARN_ON(1);
 260                 break;
 261         }
 262
 263         if (local->open_count == 0) {
 264                 res = 0;
 265                 if (local->ops->start)
 266                         res = local->ops->start(local_to_hw(local));
 267                 if (res)
 268                         goto err_del_bss;
 269                 need_hw_reconfig = 1;
 270                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 271         }
 272
 273         switch (sdata->vif.type) {
 274         case IEEE80211_IF_TYPE_VLAN:
 275                 /* no need to tell driver */
 276                 break;
 277         case IEEE80211_IF_TYPE_MNTR:
 278                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 279                         local->cooked_mntrs++;
 280                         break;
 281                 }
 282
 283                 /* must be before the call to ieee80211_configure_filter */
 284                 local->monitors++;
 285                 if (local->monitors == 1)
 286                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 287
 288                 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
 289                         local->fif_fcsfail++;
 290                 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
 291                         local->fif_plcpfail++;
 292                 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
 293                         local->fif_control++;
 294                 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
 295                         local->fif_other_bss++;
 296
 297                 netif_addr_lock_bh(local->mdev);
 298                 ieee80211_configure_filter(local);
 299                 netif_addr_unlock_bh(local->mdev);
 300                 break;
 301         case IEEE80211_IF_TYPE_STA:
 302         case IEEE80211_IF_TYPE_IBSS:
 303                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 304                 /* fall through */
 305         default:
 306                 conf.vif = &sdata->vif;
 307                 conf.type = sdata->vif.type;
 308                 conf.mac_addr = dev->dev_addr;
 309                 res = local->ops->add_interface(local_to_hw(local), &conf);
 310                 if (res)
 311                         goto err_stop;
 312
 313                 if (ieee80211_vif_is_mesh(&sdata->vif))
 314                         ieee80211_start_mesh(sdata->dev);
 315                 changed |= ieee80211_reset_erp_info(dev);
 316                 ieee80211_bss_info_change_notify(sdata, changed);
 317                 ieee80211_enable_keys(sdata);
 318
 319                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
 320                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
 321                         netif_carrier_off(dev);
 322                 else
 323                         netif_carrier_on(dev);
 324         }
 325
 326         if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
 327                 /* Create STA entry for the WDS peer */
 328                 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
 329                                      GFP_KERNEL);
 330                 if (!sta) {
 331                         res = -ENOMEM;
 332                         goto err_del_interface;
 333                 }
 334
 335                 /* no locking required since STA is not live yet */
 336                 sta->flags |= WLAN_STA_AUTHORIZED;
 337
 338                 res = sta_info_insert(sta);
 339                 if (res) {
 340                         /* STA has been freed */
 341                         goto err_del_interface;
 342                 }
 343         }
 344
 345         if (local->open_count == 0) {
 346                 res = dev_open(local->mdev);
 347                 WARN_ON(res);
 348                 if (res)
 349                         goto err_del_interface;
 350                 tasklet_enable(&local->tx_pending_tasklet);
 351                 tasklet_enable(&local->tasklet);
 352         }
 353
 354         /*
 355          * set_multicast_list will be invoked by the networking core
 356          * which will check whether any increments here were done in
 357          * error and sync them down to the hardware as filter flags.
 358          */
 359         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 360                 atomic_inc(&local->iff_allmultis);
 361
 362         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 363                 atomic_inc(&local->iff_promiscs);
 364
 365         local->open_count++;
 366         if (need_hw_reconfig)
 367                 ieee80211_hw_config(local);
 368
 369         /*
 370          * ieee80211_sta_work is disabled while network interface
 371          * is down. Therefore, some configuration changes may not
 372          * yet be effective. Trigger execution of ieee80211_sta_work
 373          * to fix this.
 374          */
 375         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 376             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 377                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 378                 queue_work(local->hw.workqueue, &ifsta->work);
 379         }
 380
 381         netif_tx_start_all_queues(dev);
 382
 383         return 0;
 384  err_del_interface:
 385         local->ops->remove_interface(local_to_hw(local), &conf);
 386  err_stop:
 387         if (!local->open_count && local->ops->stop)
 388                 local->ops->stop(local_to_hw(local));
 389  err_del_bss:
 390         sdata->bss = NULL;
 391         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
 392                 list_del(&sdata->u.vlan.list);
 393         return res;
 394 }
 395
 396 static int ieee80211_stop(struct net_device *dev)
 397 {
 398         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 399         struct ieee80211_local *local = sdata->local;
 400         struct ieee80211_if_init_conf conf;
 401         struct sta_info *sta;
 402
 403         /*
 404          * Stop TX on this interface first.
 405          */
 406         netif_tx_stop_all_queues(dev);
 407
 408         /*
 409          * Now delete all active aggregation sessions.
 410          */
 411         rcu_read_lock();
 412
 413         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 414                 if (sta->sdata == sdata)
 415                         ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
 416         }
 417
 418         rcu_read_unlock();
 419
 420         /*
 421          * Remove all stations associated with this interface.
 422          *
 423          * This must be done before calling ops->remove_interface()
 424          * because otherwise we can later invoke ops->sta_notify()
 425          * whenever the STAs are removed, and that invalidates driver
 426          * assumptions about always getting a vif pointer that is valid
 427          * (because if we remove a STA after ops->remove_interface()
 428          * the driver will have removed the vif info already!)
 429          *
 430          * We could relax this and only unlink the stations from the
 431          * hash table and list but keep them on a per-sdata list that
 432          * will be inserted back again when the interface is brought
 433          * up again, but I don't currently see a use case for that,
 434          * except with WDS which gets a STA entry created when it is
 435          * brought up.
 436          */
 437         sta_info_flush(local, sdata);
 438
 439         /*
 440          * Don't count this interface for promisc/allmulti while it
 441          * is down. dev_mc_unsync() will invoke set_multicast_list
 442          * on the master interface which will sync these down to the
 443          * hardware as filter flags.
 444          */
 445         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 446                 atomic_dec(&local->iff_allmultis);
 447
 448         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 449                 atomic_dec(&local->iff_promiscs);
 450
 451         dev_mc_unsync(local->mdev, dev);
 452
 453         /* APs need special treatment */
 454         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 455                 struct ieee80211_sub_if_data *vlan, *tmp;
 456                 struct beacon_data *old_beacon = sdata->u.ap.beacon;
 457
 458                 /* remove beacon */
 459                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 460                 synchronize_rcu();
 461                 kfree(old_beacon);
 462
 463                 /* down all dependent devices, that is VLANs */
 464                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 465                                          u.vlan.list)
 466                         dev_close(vlan->dev);
 467                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 468         }
 469
 470         local->open_count--;
 471
 472         switch (sdata->vif.type) {
 473         case IEEE80211_IF_TYPE_VLAN:
 474                 list_del(&sdata->u.vlan.list);
 475                 /* no need to tell driver */
 476                 break;
 477         case IEEE80211_IF_TYPE_MNTR:
 478                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 479                         local->cooked_mntrs--;
 480                         break;
 481                 }
 482
 483                 local->monitors--;
 484                 if (local->monitors == 0)
 485                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 486
 487                 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
 488                         local->fif_fcsfail--;
 489                 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
 490                         local->fif_plcpfail--;
 491                 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
 492                         local->fif_control--;
 493                 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
 494                         local->fif_other_bss--;
 495
 496                 netif_addr_lock_bh(local->mdev);
 497                 ieee80211_configure_filter(local);
 498                 netif_addr_unlock_bh(local->mdev);
 499                 break;
 500         case IEEE80211_IF_TYPE_MESH_POINT:
 501                 /* allmulti is always set on mesh ifaces */
 502                 atomic_dec(&local->iff_allmultis);
 503                 /* fall through */
 504         case IEEE80211_IF_TYPE_STA:
 505         case IEEE80211_IF_TYPE_IBSS:
 506                 sdata->u.sta.state = IEEE80211_DISABLED;
 507                 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
 508                 del_timer_sync(&sdata->u.sta.timer);
 509                 /*
 510                  * When we get here, the interface is marked down.
 511                  * Call synchronize_rcu() to wait for the RX path
 512                  * should it be using the interface and enqueuing
 513                  * frames at this very time on another CPU.
 514                  */
 515                 synchronize_rcu();
 516                 skb_queue_purge(&sdata->u.sta.skb_queue);
 517
 518                 if (local->scan_dev == sdata->dev) {
 519                         if (!local->ops->hw_scan) {
 520                                 local->sta_sw_scanning = 0;
 521                                 cancel_delayed_work(&local->scan_work);
 522                         } else
 523                                 local->sta_hw_scanning = 0;
 524                 }
 525
 526                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 527                 kfree(sdata->u.sta.extra_ie);
 528                 sdata->u.sta.extra_ie = NULL;
 529                 sdata->u.sta.extra_ie_len = 0;
 530                 /* fall through */
 531         default:
 532                 conf.vif = &sdata->vif;
 533                 conf.type = sdata->vif.type;
 534                 conf.mac_addr = dev->dev_addr;
 535                 /* disable all keys for as long as this netdev is down */
 536                 ieee80211_disable_keys(sdata);
 537                 local->ops->remove_interface(local_to_hw(local), &conf);
 538         }
 539
 540         sdata->bss = NULL;
 541
 542         if (local->open_count == 0) {
 543                 if (netif_running(local->mdev))
 544                         dev_close(local->mdev);
 545
 546                 if (local->ops->stop)
 547                         local->ops->stop(local_to_hw(local));
 548
 549                 ieee80211_led_radio(local, 0);
 550
 551                 flush_workqueue(local->hw.workqueue);
 552
 553                 tasklet_disable(&local->tx_pending_tasklet);
 554                 tasklet_disable(&local->tasklet);
 555         }
 556
 557         return 0;
 558 }
 559
 560 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 561 {
 562         struct ieee80211_local *local = hw_to_local(hw);
 563         struct sta_info *sta;
 564         struct ieee80211_sub_if_data *sdata;
 565         u16 start_seq_num = 0;
 566         u8 *state;
 567         int ret;
 568         DECLARE_MAC_BUF(mac);
 569
 570         if (tid >= STA_TID_NUM)
 571                 return -EINVAL;
 572
 573 #ifdef CONFIG_MAC80211_HT_DEBUG
 574         printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
 575                                 print_mac(mac, ra), tid);
 576 #endif /* CONFIG_MAC80211_HT_DEBUG */
 577
 578         rcu_read_lock();
 579
 580         sta = sta_info_get(local, ra);
 581         if (!sta) {
 582 #ifdef CONFIG_MAC80211_HT_DEBUG
 583                 printk(KERN_DEBUG "Could not find the station\n");
 584 #endif
 585                 ret = -ENOENT;
 586                 goto exit;
 587         }
 588
 589         spin_lock_bh(&sta->lock);
 590
 591         /* we have tried too many times, receiver does not want A-MPDU */
 592         if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
 593                 ret = -EBUSY;
 594                 goto err_unlock_sta;
 595         }
 596
 597         state = &sta->ampdu_mlme.tid_state_tx[tid];
 598         /* check if the TID is not in aggregation flow already */
 599         if (*state != HT_AGG_STATE_IDLE) {
 600 #ifdef CONFIG_MAC80211_HT_DEBUG
 601                 printk(KERN_DEBUG "BA request denied - session is not "
 602                                  "idle on tid %u\n", tid);
 603 #endif /* CONFIG_MAC80211_HT_DEBUG */
 604                 ret = -EAGAIN;
 605                 goto err_unlock_sta;
 606         }
 607
 608         /* prepare A-MPDU MLME for Tx aggregation */
 609         sta->ampdu_mlme.tid_tx[tid] =
 610                         kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
 611         if (!sta->ampdu_mlme.tid_tx[tid]) {
 612 #ifdef CONFIG_MAC80211_HT_DEBUG
 613                 if (net_ratelimit())
 614                         printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
 615                                         tid);
 616 #endif
 617                 ret = -ENOMEM;
 618                 goto err_unlock_sta;
 619         }
 620         /* Tx timer */
 621         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
 622                         sta_addba_resp_timer_expired;
 623         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
 624                         (unsigned long)&sta->timer_to_tid[tid];
 625         init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
 626
 627         /* create a new queue for this aggregation */
 628         ret = ieee80211_ht_agg_queue_add(local, sta, tid);
 629
 630         /* case no queue is available to aggregation
 631          * don't switch to aggregation */
 632         if (ret) {
 633 #ifdef CONFIG_MAC80211_HT_DEBUG
 634                 printk(KERN_DEBUG "BA request denied - queue unavailable for"
 635                                         " tid %d\n", tid);
 636 #endif /* CONFIG_MAC80211_HT_DEBUG */
 637                 goto err_unlock_queue;
 638         }
 639         sdata = sta->sdata;
 640
 641         /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
 642          * call back right away, it must see that the flow has begun */
 643         *state |= HT_ADDBA_REQUESTED_MSK;
 644
 645         if (local->ops->ampdu_action)
 646                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
 647                                                 ra, tid, &start_seq_num);
 648
 649         if (ret) {
 650                 /* No need to requeue the packets in the agg queue, since we
 651                  * held the tx lock: no packet could be enqueued to the newly
 652                  * allocated queue */
 653                 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
 654 #ifdef CONFIG_MAC80211_HT_DEBUG
 655                 printk(KERN_DEBUG "BA request denied - HW unavailable for"
 656                                         " tid %d\n", tid);
 657 #endif /* CONFIG_MAC80211_HT_DEBUG */
 658                 *state = HT_AGG_STATE_IDLE;
 659                 goto err_unlock_queue;
 660         }
 661
 662         /* Will put all the packets in the new SW queue */
 663         ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
 664         spin_unlock_bh(&sta->lock);
 665
 666         /* send an addBA request */
 667         sta->ampdu_mlme.dialog_token_allocator++;
 668         sta->ampdu_mlme.tid_tx[tid]->dialog_token =
 669                         sta->ampdu_mlme.dialog_token_allocator;
 670         sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
 671
 672
 673         ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
 674                          sta->ampdu_mlme.tid_tx[tid]->dialog_token,
 675                          sta->ampdu_mlme.tid_tx[tid]->ssn,
 676                          0x40, 5000);
 677         /* activate the timer for the recipient's addBA response */
 678         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
 679                                 jiffies + ADDBA_RESP_INTERVAL;
 680         add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
 681 #ifdef CONFIG_MAC80211_HT_DEBUG
 682         printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
 683 #endif
 684         goto exit;
 685
 686 err_unlock_queue:
 687         kfree(sta->ampdu_mlme.tid_tx[tid]);
 688         sta->ampdu_mlme.tid_tx[tid] = NULL;
 689         ret = -EBUSY;
 690 err_unlock_sta:
 691         spin_unlock_bh(&sta->lock);
 692 exit:
 693         rcu_read_unlock();
 694         return ret;
 695 }
 696 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
 697
 698 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
 699                                  u8 *ra, u16 tid,
 700                                  enum ieee80211_back_parties initiator)
 701 {
 702         struct ieee80211_local *local = hw_to_local(hw);
 703         struct sta_info *sta;
 704         u8 *state;
 705         int ret = 0;
 706         DECLARE_MAC_BUF(mac);
 707
 708         if (tid >= STA_TID_NUM)
 709                 return -EINVAL;
 710
 711         rcu_read_lock();
 712         sta = sta_info_get(local, ra);
 713         if (!sta) {
 714                 rcu_read_unlock();
 715                 return -ENOENT;
 716         }
 717
 718         /* check if the TID is in aggregation */
 719         state = &sta->ampdu_mlme.tid_state_tx[tid];
 720         spin_lock_bh(&sta->lock);
 721
 722         if (*state != HT_AGG_STATE_OPERATIONAL) {
 723                 ret = -ENOENT;
 724                 goto stop_BA_exit;
 725         }
 726
 727 #ifdef CONFIG_MAC80211_HT_DEBUG
 728         printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
 729                                 print_mac(mac, ra), tid);
 730 #endif /* CONFIG_MAC80211_HT_DEBUG */
 731
 732         ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
 733
 734         *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
 735                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
 736
 737         if (local->ops->ampdu_action)
 738                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
 739                                                 ra, tid, NULL);
 740
 741         /* case HW denied going back to legacy */
 742         if (ret) {
 743                 WARN_ON(ret != -EBUSY);
 744                 *state = HT_AGG_STATE_OPERATIONAL;
 745                 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 746                 goto stop_BA_exit;
 747         }
 748
 749 stop_BA_exit:
 750         spin_unlock_bh(&sta->lock);
 751         rcu_read_unlock();
 752         return ret;
 753 }
 754 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
 755
 756 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 757 {
 758         struct ieee80211_local *local = hw_to_local(hw);
 759         struct sta_info *sta;
 760         u8 *state;
 761         DECLARE_MAC_BUF(mac);
 762
 763         if (tid >= STA_TID_NUM) {
 764 #ifdef CONFIG_MAC80211_HT_DEBUG
 765                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
 766                                 tid, STA_TID_NUM);
 767 #endif
 768                 return;
 769         }
 770
 771         rcu_read_lock();
 772         sta = sta_info_get(local, ra);
 773         if (!sta) {
 774                 rcu_read_unlock();
 775 #ifdef CONFIG_MAC80211_HT_DEBUG
 776                 printk(KERN_DEBUG "Could not find station: %s\n",
 777                                 print_mac(mac, ra));
 778 #endif
 779                 return;
 780         }
 781
 782         state = &sta->ampdu_mlme.tid_state_tx[tid];
 783         spin_lock_bh(&sta->lock);
 784
 785         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
 786 #ifdef CONFIG_MAC80211_HT_DEBUG
 787                 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
 788                                 *state);
 789 #endif
 790                 spin_unlock_bh(&sta->lock);
 791                 rcu_read_unlock();
 792                 return;
 793         }
 794
 795         WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
 796
 797         *state |= HT_ADDBA_DRV_READY_MSK;
 798
 799         if (*state == HT_AGG_STATE_OPERATIONAL) {
 800 #ifdef CONFIG_MAC80211_HT_DEBUG
 801                 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
 802 #endif
 803                 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 804         }
 805         spin_unlock_bh(&sta->lock);
 806         rcu_read_unlock();
 807 }
 808 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
 809
 810 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
 811 {
 812         struct ieee80211_local *local = hw_to_local(hw);
 813         struct sta_info *sta;
 814         u8 *state;
 815         int agg_queue;
 816         DECLARE_MAC_BUF(mac);
 817
 818         if (tid >= STA_TID_NUM) {
 819 #ifdef CONFIG_MAC80211_HT_DEBUG
 820                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
 821                                 tid, STA_TID_NUM);
 822 #endif
 823                 return;
 824         }
 825
 826 #ifdef CONFIG_MAC80211_HT_DEBUG
 827         printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
 828                                 print_mac(mac, ra), tid);
 829 #endif /* CONFIG_MAC80211_HT_DEBUG */
 830
 831         rcu_read_lock();
 832         sta = sta_info_get(local, ra);
 833         if (!sta) {
 834 #ifdef CONFIG_MAC80211_HT_DEBUG
 835                 printk(KERN_DEBUG "Could not find station: %s\n",
 836                                 print_mac(mac, ra));
 837 #endif
 838                 rcu_read_unlock();
 839                 return;
 840         }
 841         state = &sta->ampdu_mlme.tid_state_tx[tid];
 842
 843         /* NOTE: no need to use sta->lock in this state check, as
 844          * ieee80211_stop_tx_ba_session will let only one stop call to
 845          * pass through per sta/tid
 846          */
 847         if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
 848 #ifdef CONFIG_MAC80211_HT_DEBUG
 849                 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
 850 #endif
 851                 rcu_read_unlock();
 852                 return;
 853         }
 854
 855         if (*state & HT_AGG_STATE_INITIATOR_MSK)
 856                 ieee80211_send_delba(sta->sdata->dev, ra, tid,
 857                         WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
 858
 859         agg_queue = sta->tid_to_tx_q[tid];
 860
 861         ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
 862
 863         /* We just requeued the all the frames that were in the
 864          * removed queue, and since we might miss a softirq we do
 865          * netif_schedule_queue.  ieee80211_wake_queue is not used
 866          * here as this queue is not necessarily stopped
 867          */
 868         netif_schedule_queue(netdev_get_tx_queue(local->mdev, agg_queue));
 869         spin_lock_bh(&sta->lock);
 870         *state = HT_AGG_STATE_IDLE;
 871         sta->ampdu_mlme.addba_req_num[tid] = 0;
 872         kfree(sta->ampdu_mlme.tid_tx[tid]);
 873         sta->ampdu_mlme.tid_tx[tid] = NULL;
 874         spin_unlock_bh(&sta->lock);
 875
 876         rcu_read_unlock();
 877 }
 878 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
 879
 880 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
 881                                       const u8 *ra, u16 tid)
 882 {
 883         struct ieee80211_local *local = hw_to_local(hw);
 884         struct ieee80211_ra_tid *ra_tid;
 885         struct sk_buff *skb = dev_alloc_skb(0);
 886
 887         if (unlikely(!skb)) {
 888 #ifdef CONFIG_MAC80211_HT_DEBUG
 889                 if (net_ratelimit())
 890                         printk(KERN_WARNING "%s: Not enough memory, "
 891                                "dropping start BA session", skb->dev->name);
 892 #endif
 893                 return;
 894         }
 895         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 896         memcpy(&ra_tid->ra, ra, ETH_ALEN);
 897         ra_tid->tid = tid;
 898
 899         skb->pkt_type = IEEE80211_ADDBA_MSG;
 900         skb_queue_tail(&local->skb_queue, skb);
 901         tasklet_schedule(&local->tasklet);
 902 }
 903 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
 904
 905 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
 906                                      const u8 *ra, u16 tid)
 907 {
 908         struct ieee80211_local *local = hw_to_local(hw);
 909         struct ieee80211_ra_tid *ra_tid;
 910         struct sk_buff *skb = dev_alloc_skb(0);
 911
 912         if (unlikely(!skb)) {
 913 #ifdef CONFIG_MAC80211_HT_DEBUG
 914                 if (net_ratelimit())
 915                         printk(KERN_WARNING "%s: Not enough memory, "
 916                                "dropping stop BA session", skb->dev->name);
 917 #endif
 918                 return;
 919         }
 920         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 921         memcpy(&ra_tid->ra, ra, ETH_ALEN);
 922         ra_tid->tid = tid;
 923
 924         skb->pkt_type = IEEE80211_DELBA_MSG;
 925         skb_queue_tail(&local->skb_queue, skb);
 926         tasklet_schedule(&local->tasklet);
 927 }
 928 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
 929
 930 static void ieee80211_set_multicast_list(struct net_device *dev)
 931 {
 932         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 933         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 934         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 935
 936         allmulti = !!(dev->flags & IFF_ALLMULTI);
 937         promisc = !!(dev->flags & IFF_PROMISC);
 938         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 939         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 940
 941         if (allmulti != sdata_allmulti) {
 942                 if (dev->flags & IFF_ALLMULTI)
 943                         atomic_inc(&local->iff_allmultis);
 944                 else
 945                         atomic_dec(&local->iff_allmultis);
 946                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 947         }
 948
 949         if (promisc != sdata_promisc) {
 950                 if (dev->flags & IFF_PROMISC)
 951                         atomic_inc(&local->iff_promiscs);
 952                 else
 953                         atomic_dec(&local->iff_promiscs);
 954                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 955         }
 956
 957         dev_mc_sync(local->mdev, dev);
 958 }
 959
 960 static const struct header_ops ieee80211_header_ops = {
 961         .create         = eth_header,
 962         .parse          = header_parse_80211,
 963         .rebuild        = eth_rebuild_header,
 964         .cache          = eth_header_cache,
 965         .cache_update   = eth_header_cache_update,
 966 };
 967
 968 void ieee80211_if_setup(struct net_device *dev)
 969 {
 970         ether_setup(dev);
 971         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 972         dev->wireless_handlers = &ieee80211_iw_handler_def;
 973         dev->set_multicast_list = ieee80211_set_multicast_list;
 974         dev->change_mtu = ieee80211_change_mtu;
 975         dev->open = ieee80211_open;
 976         dev->stop = ieee80211_stop;
 977         dev->destructor = free_netdev;
 978 }
 979
 980 /* everything else */
 981
 982 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
 983 {
 984         struct ieee80211_local *local = sdata->local;
 985         struct ieee80211_if_conf conf;
 986
 987         if (WARN_ON(!netif_running(sdata->dev)))
 988                 return 0;
 989
 990         if (!local->ops->config_interface)
 991                 return 0;
 992
 993         memset(&conf, 0, sizeof(conf));
 994         conf.changed = changed;
 995
 996         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 997             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 998                 conf.bssid = sdata->u.sta.bssid;
 999                 conf.ssid = sdata->u.sta.ssid;
1000                 conf.ssid_len = sdata->u.sta.ssid_len;
1001         } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1002                 conf.bssid = sdata->dev->dev_addr;
1003                 conf.ssid = sdata->u.ap.ssid;
1004                 conf.ssid_len = sdata->u.ap.ssid_len;
1005         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1006                 u8 zero[ETH_ALEN] = { 0 };
1007                 conf.bssid = zero;
1008                 conf.ssid = zero;
1009                 conf.ssid_len = 0;
1010         } else {
1011                 WARN_ON(1);
1012                 return -EINVAL;
1013         }
1014
1015         if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
1016                 return -EINVAL;
1017
1018         if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
1019                 return -EINVAL;
1020
1021         return local->ops->config_interface(local_to_hw(local),
1022                                             &sdata->vif, &conf);
1023 }
1024
1025 int ieee80211_hw_config(struct ieee80211_local *local)
1026 {
1027         struct ieee80211_channel *chan;
1028         int ret = 0;
1029
1030         if (local->sta_sw_scanning)
1031                 chan = local->scan_channel;
1032         else
1033                 chan = local->oper_channel;
1034
1035         local->hw.conf.channel = chan;
1036
1037         if (!local->hw.conf.power_level)
1038                 local->hw.conf.power_level = chan->max_power;
1039         else
1040                 local->hw.conf.power_level = min(chan->max_power,
1041                                                local->hw.conf.power_level);
1042
1043         local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1044
1045 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1046         printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1047                wiphy_name(local->hw.wiphy), chan->center_freq);
1048 #endif
1049
1050         if (local->open_count)
1051                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1052
1053         return ret;
1054 }
1055
1056 /**
1057  * ieee80211_handle_ht should be used only after legacy configuration
1058  * has been determined namely band, as ht configuration depends upon
1059  * the hardware's HT abilities for a _specific_ band.
1060  */
1061 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1062                            struct ieee80211_ht_info *req_ht_cap,
1063                            struct ieee80211_ht_bss_info *req_bss_cap)
1064 {
1065         struct ieee80211_conf *conf = &local->hw.conf;
1066         struct ieee80211_supported_band *sband;
1067         struct ieee80211_ht_info ht_conf;
1068         struct ieee80211_ht_bss_info ht_bss_conf;
1069         u32 changed = 0;
1070         int i;
1071         u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1072         u8 tx_mcs_set_cap;
1073
1074         sband = local->hw.wiphy->bands[conf->channel->band];
1075
1076         memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1077         memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1078
1079         /* HT is not supported */
1080         if (!sband->ht_info.ht_supported) {
1081                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1082                 goto out;
1083         }
1084
1085         /* disable HT */
1086         if (!enable_ht) {
1087                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1088                         changed |= BSS_CHANGED_HT;
1089                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1090                 conf->ht_conf.ht_supported = 0;
1091                 goto out;
1092         }
1093
1094
1095         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1096                 changed |= BSS_CHANGED_HT;
1097
1098         conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1099         ht_conf.ht_supported = 1;
1100
1101         ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1102         ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1103         ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1104         ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1105         ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1106         ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1107
1108         ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1109         ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1110
1111         /* Bits 96-100 */
1112         tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1113
1114         /* configure suppoerted Tx MCS according to requested MCS
1115          * (based in most cases on Rx capabilities of peer) and self
1116          * Tx MCS capabilities (as defined by low level driver HW
1117          * Tx capabilities) */
1118         if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1119                 goto check_changed;
1120
1121         /* Counting from 0 therfore + 1 */
1122         if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1123                 max_tx_streams = ((tx_mcs_set_cap &
1124                                 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1125
1126         for (i = 0; i < max_tx_streams; i++)
1127                 ht_conf.supp_mcs_set[i] =
1128                         sband->ht_info.supp_mcs_set[i] &
1129                                         req_ht_cap->supp_mcs_set[i];
1130
1131         if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1132                 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1133                      i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1134                         ht_conf.supp_mcs_set[i] =
1135                                 sband->ht_info.supp_mcs_set[i] &
1136                                         req_ht_cap->supp_mcs_set[i];
1137
1138 check_changed:
1139         /* if bss configuration changed store the new one */
1140         if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1141             memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1142                 changed |= BSS_CHANGED_HT;
1143                 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1144                 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1145         }
1146 out:
1147         return changed;
1148 }
1149
1150 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1151                                       u32 changed)
1152 {
1153         struct ieee80211_local *local = sdata->local;
1154
1155         if (!changed)
1156                 return;
1157
1158         if (local->ops->bss_info_changed)
1159                 local->ops->bss_info_changed(local_to_hw(local),
1160                                              &sdata->vif,
1161                                              &sdata->bss_conf,
1162                                              changed);
1163 }
1164
1165 u32 ieee80211_reset_erp_info(struct net_device *dev)
1166 {
1167         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1168
1169         sdata->bss_conf.use_cts_prot = 0;
1170         sdata->bss_conf.use_short_preamble = 0;
1171         return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
1172 }
1173
1174 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1175                                  struct sk_buff *skb)
1176 {
1177         struct ieee80211_local *local = hw_to_local(hw);
1178         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1179         int tmp;
1180
1181         skb->dev = local->mdev;
1182         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1183         skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1184                        &local->skb_queue : &local->skb_queue_unreliable, skb);
1185         tmp = skb_queue_len(&local->skb_queue) +
1186                 skb_queue_len(&local->skb_queue_unreliable);
1187         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1188                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1189                 dev_kfree_skb_irq(skb);
1190                 tmp--;
1191                 I802_DEBUG_INC(local->tx_status_drop);
1192         }
1193         tasklet_schedule(&local->tasklet);
1194 }
1195 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1196
1197 static void ieee80211_tasklet_handler(unsigned long data)
1198 {
1199         struct ieee80211_local *local = (struct ieee80211_local *) data;
1200         struct sk_buff *skb;
1201         struct ieee80211_rx_status rx_status;
1202         struct ieee80211_ra_tid *ra_tid;
1203
1204         while ((skb = skb_dequeue(&local->skb_queue)) ||
1205                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1206                 switch (skb->pkt_type) {
1207                 case IEEE80211_RX_MSG:
1208                         /* status is in skb->cb */
1209                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
1210                         /* Clear skb->pkt_type in order to not confuse kernel
1211                          * netstack. */
1212                         skb->pkt_type = 0;
1213                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1214                         break;
1215                 case IEEE80211_TX_STATUS_MSG:
1216                         skb->pkt_type = 0;
1217                         ieee80211_tx_status(local_to_hw(local), skb);
1218                         break;
1219                 case IEEE80211_DELBA_MSG:
1220                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1221                         ieee80211_stop_tx_ba_cb(local_to_hw(local),
1222                                                 ra_tid->ra, ra_tid->tid);
1223                         dev_kfree_skb(skb);
1224                         break;
1225                 case IEEE80211_ADDBA_MSG:
1226                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1227                         ieee80211_start_tx_ba_cb(local_to_hw(local),
1228                                                  ra_tid->ra, ra_tid->tid);
1229                         dev_kfree_skb(skb);
1230                         break ;
1231                 default:
1232                         WARN_ON(1);
1233                         dev_kfree_skb(skb);
1234                         break;
1235                 }
1236         }
1237 }
1238
1239 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1240  * make a prepared TX frame (one that has been given to hw) to look like brand
1241  * new IEEE 802.11 frame that is ready to go through TX processing again.
1242  */
1243 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1244                                       struct ieee80211_key *key,
1245                                       struct sk_buff *skb)
1246 {
1247         int hdrlen, iv_len, mic_len;
1248
1249         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1250
1251         if (!key)
1252                 goto no_key;
1253
1254         switch (key->conf.alg) {
1255         case ALG_WEP:
1256                 iv_len = WEP_IV_LEN;
1257                 mic_len = WEP_ICV_LEN;
1258                 break;
1259         case ALG_TKIP:
1260                 iv_len = TKIP_IV_LEN;
1261                 mic_len = TKIP_ICV_LEN;
1262                 break;
1263         case ALG_CCMP:
1264                 iv_len = CCMP_HDR_LEN;
1265                 mic_len = CCMP_MIC_LEN;
1266                 break;
1267         default:
1268                 goto no_key;
1269         }
1270
1271         if (skb->len >= mic_len &&
1272             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1273                 skb_trim(skb, skb->len - mic_len);
1274         if (skb->len >= iv_len && skb->len > hdrlen) {
1275                 memmove(skb->data + iv_len, skb->data, hdrlen);
1276                 skb_pull(skb, iv_len);
1277         }
1278
1279 no_key:
1280         {
1281                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1282                 u16 fc = le16_to_cpu(hdr->frame_control);
1283                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1284                         fc &= ~IEEE80211_STYPE_QOS_DATA;
1285                         hdr->frame_control = cpu_to_le16(fc);
1286                         memmove(skb->data + 2, skb->data, hdrlen - 2);
1287                         skb_pull(skb, 2);
1288                 }
1289         }
1290 }
1291
1292 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1293                                             struct sta_info *sta,
1294                                             struct sk_buff *skb)
1295 {
1296         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1297
1298         sta->tx_filtered_count++;
1299
1300         /*
1301          * Clear the TX filter mask for this STA when sending the next
1302          * packet. If the STA went to power save mode, this will happen
1303          * when it wakes up for the next time.
1304          */
1305         set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1306
1307         /*
1308          * This code races in the following way:
1309          *
1310          *  (1) STA sends frame indicating it will go to sleep and does so
1311          *  (2) hardware/firmware adds STA to filter list, passes frame up
1312          *  (3) hardware/firmware processes TX fifo and suppresses a frame
1313          *  (4) we get TX status before having processed the frame and
1314          *      knowing that the STA has gone to sleep.
1315          *
1316          * This is actually quite unlikely even when both those events are
1317          * processed from interrupts coming in quickly after one another or
1318          * even at the same time because we queue both TX status events and
1319          * RX frames to be processed by a tasklet and process them in the
1320          * same order that they were received or TX status last. Hence, there
1321          * is no race as long as the frame RX is processed before the next TX
1322          * status, which drivers can ensure, see below.
1323          *
1324          * Note that this can only happen if the hardware or firmware can
1325          * actually add STAs to the filter list, if this is done by the
1326          * driver in response to set_tim() (which will only reduce the race
1327          * this whole filtering tries to solve, not completely solve it)
1328          * this situation cannot happen.
1329          *
1330          * To completely solve this race drivers need to make sure that they
1331          *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1332          *      functions and
1333          *  (b) always process RX events before TX status events if ordering
1334          *      can be unknown, for example with different interrupt status
1335          *      bits.
1336          */
1337         if (test_sta_flags(sta, WLAN_STA_PS) &&
1338             skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1339                 ieee80211_remove_tx_extra(local, sta->key, skb);
1340                 skb_queue_tail(&sta->tx_filtered, skb);
1341                 return;
1342         }
1343
1344         if (!test_sta_flags(sta, WLAN_STA_PS) &&
1345             !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1346                 /* Software retry the packet once */
1347                 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1348                 ieee80211_remove_tx_extra(local, sta->key, skb);
1349                 dev_queue_xmit(skb);
1350                 return;
1351         }
1352
1353 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1354         if (net_ratelimit())
1355                 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1356                        "queue_len=%d PS=%d @%lu\n",
1357                        wiphy_name(local->hw.wiphy),
1358                        skb_queue_len(&sta->tx_filtered),
1359                        !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1360 #endif
1361         dev_kfree_skb(skb);
1362 }
1363
1364 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1365 {
1366         struct sk_buff *skb2;
1367         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1368         struct ieee80211_local *local = hw_to_local(hw);
1369         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1370         u16 frag, type;
1371         __le16 fc;
1372         struct ieee80211_tx_status_rtap_hdr *rthdr;
1373         struct ieee80211_sub_if_data *sdata;
1374         struct net_device *prev_dev = NULL;
1375         struct sta_info *sta;
1376
1377         rcu_read_lock();
1378
1379         if (info->status.excessive_retries) {
1380                 sta = sta_info_get(local, hdr->addr1);
1381                 if (sta) {
1382                         if (test_sta_flags(sta, WLAN_STA_PS)) {
1383                                 /*
1384                                  * The STA is in power save mode, so assume
1385                                  * that this TX packet failed because of that.
1386                                  */
1387                                 ieee80211_handle_filtered_frame(local, sta, skb);
1388                                 rcu_read_unlock();
1389                                 return;
1390                         }
1391                 }
1392         }
1393
1394         fc = hdr->frame_control;
1395
1396         if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1397             (ieee80211_is_data_qos(fc))) {
1398                 u16 tid, ssn;
1399                 u8 *qc;
1400                 sta = sta_info_get(local, hdr->addr1);
1401                 if (sta) {
1402                         qc = ieee80211_get_qos_ctl(hdr);
1403                         tid = qc[0] & 0xf;
1404                         ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1405                                                 & IEEE80211_SCTL_SEQ);
1406                         ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
1407                                            tid, ssn);
1408                 }
1409         }
1410
1411         if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1412                 sta = sta_info_get(local, hdr->addr1);
1413                 if (sta) {
1414                         ieee80211_handle_filtered_frame(local, sta, skb);
1415                         rcu_read_unlock();
1416                         return;
1417                 }
1418         } else
1419                 rate_control_tx_status(local->mdev, skb);
1420
1421         rcu_read_unlock();
1422
1423         ieee80211_led_tx(local, 0);
1424
1425         /* SNMP counters
1426          * Fragments are passed to low-level drivers as separate skbs, so these
1427          * are actually fragments, not frames. Update frame counters only for
1428          * the first fragment of the frame. */
1429
1430         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1431         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1432
1433         if (info->flags & IEEE80211_TX_STAT_ACK) {
1434                 if (frag == 0) {
1435                         local->dot11TransmittedFrameCount++;
1436                         if (is_multicast_ether_addr(hdr->addr1))
1437                                 local->dot11MulticastTransmittedFrameCount++;
1438                         if (info->status.retry_count > 0)
1439                                 local->dot11RetryCount++;
1440                         if (info->status.retry_count > 1)
1441                                 local->dot11MultipleRetryCount++;
1442                 }
1443
1444                 /* This counter shall be incremented for an acknowledged MPDU
1445                  * with an individual address in the address 1 field or an MPDU
1446                  * with a multicast address in the address 1 field of type Data
1447                  * or Management. */
1448                 if (!is_multicast_ether_addr(hdr->addr1) ||
1449                     type == IEEE80211_FTYPE_DATA ||
1450                     type == IEEE80211_FTYPE_MGMT)
1451                         local->dot11TransmittedFragmentCount++;
1452         } else {
1453                 if (frag == 0)
1454                         local->dot11FailedCount++;
1455         }
1456
1457         /* this was a transmitted frame, but now we want to reuse it */
1458         skb_orphan(skb);
1459
1460         /*
1461          * This is a bit racy but we can avoid a lot of work
1462          * with this test...
1463          */
1464         if (!local->monitors && !local->cooked_mntrs) {
1465                 dev_kfree_skb(skb);
1466                 return;
1467         }
1468
1469         /* send frame to monitor interfaces now */
1470
1471         if (skb_headroom(skb) < sizeof(*rthdr)) {
1472                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1473                 dev_kfree_skb(skb);
1474                 return;
1475         }
1476
1477         rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1478                                 skb_push(skb, sizeof(*rthdr));
1479
1480         memset(rthdr, 0, sizeof(*rthdr));
1481         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1482         rthdr->hdr.it_present =
1483                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1484                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1485
1486         if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1487             !is_multicast_ether_addr(hdr->addr1))
1488                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1489
1490         if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1491             (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1492                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1493         else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1494                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1495
1496         rthdr->data_retries = info->status.retry_count;
1497
1498         /* XXX: is this sufficient for BPF? */
1499         skb_set_mac_header(skb, 0);
1500         skb->ip_summed = CHECKSUM_UNNECESSARY;
1501         skb->pkt_type = PACKET_OTHERHOST;
1502         skb->protocol = htons(ETH_P_802_2);
1503         memset(skb->cb, 0, sizeof(skb->cb));
1504
1505         rcu_read_lock();
1506         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1507                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1508                         if (!netif_running(sdata->dev))
1509                                 continue;
1510
1511                         if (prev_dev) {
1512                                 skb2 = skb_clone(skb, GFP_ATOMIC);
1513                                 if (skb2) {
1514                                         skb2->dev = prev_dev;
1515                                         netif_rx(skb2);
1516                                 }
1517                         }
1518
1519                         prev_dev = sdata->dev;
1520                 }
1521         }
1522         if (prev_dev) {
1523                 skb->dev = prev_dev;
1524                 netif_rx(skb);
1525                 skb = NULL;
1526         }
1527         rcu_read_unlock();
1528         dev_kfree_skb(skb);
1529 }
1530 EXPORT_SYMBOL(ieee80211_tx_status);
1531
1532 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1533                                         const struct ieee80211_ops *ops)
1534 {
1535         struct ieee80211_local *local;
1536         int priv_size;
1537         struct wiphy *wiphy;
1538
1539         /* Ensure 32-byte alignment of our private data and hw private data.
1540          * We use the wiphy priv data for both our ieee80211_local and for
1541          * the driver's private data
1542          *
1543          * In memory it'll be like this:
1544          *
1545          * +-------------------------+
1546          * | struct wiphy           |
1547          * +-------------------------+
1548          * | struct ieee80211_local  |
1549          * +-------------------------+
1550          * | driver's private data   |
1551          * +-------------------------+
1552          *
1553          */
1554         priv_size = ((sizeof(struct ieee80211_local) +
1555                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1556                     priv_data_len;
1557
1558         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1559
1560         if (!wiphy)
1561                 return NULL;
1562
1563         wiphy->privid = mac80211_wiphy_privid;
1564
1565         local = wiphy_priv(wiphy);
1566         local->hw.wiphy = wiphy;
1567
1568         local->hw.priv = (char *)local +
1569                          ((sizeof(struct ieee80211_local) +
1570                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1571
1572         BUG_ON(!ops->tx);
1573         BUG_ON(!ops->start);
1574         BUG_ON(!ops->stop);
1575         BUG_ON(!ops->config);
1576         BUG_ON(!ops->add_interface);
1577         BUG_ON(!ops->remove_interface);
1578         BUG_ON(!ops->configure_filter);
1579         local->ops = ops;
1580
1581         local->hw.queues = 1; /* default */
1582
1583         local->bridge_packets = 1;
1584
1585         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1586         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1587         local->short_retry_limit = 7;
1588         local->long_retry_limit = 4;
1589         local->hw.conf.radio_enabled = 1;
1590
1591         INIT_LIST_HEAD(&local->interfaces);
1592
1593         spin_lock_init(&local->key_lock);
1594
1595         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1596
1597         sta_info_init(local);
1598
1599         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1600                      (unsigned long)local);
1601         tasklet_disable(&local->tx_pending_tasklet);
1602
1603         tasklet_init(&local->tasklet,
1604                      ieee80211_tasklet_handler,
1605                      (unsigned long) local);
1606         tasklet_disable(&local->tasklet);
1607
1608         skb_queue_head_init(&local->skb_queue);
1609         skb_queue_head_init(&local->skb_queue_unreliable);
1610
1611         return local_to_hw(local);
1612 }
1613 EXPORT_SYMBOL(ieee80211_alloc_hw);
1614
1615 int ieee80211_register_hw(struct ieee80211_hw *hw)
1616 {
1617         struct ieee80211_local *local = hw_to_local(hw);
1618         const char *name;
1619         int result;
1620         enum ieee80211_band band;
1621         struct net_device *mdev;
1622         struct wireless_dev *mwdev;
1623
1624         /*
1625          * generic code guarantees at least one band,
1626          * set this very early because much code assumes
1627          * that hw.conf.channel is assigned
1628          */
1629         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1630                 struct ieee80211_supported_band *sband;
1631
1632                 sband = local->hw.wiphy->bands[band];
1633                 if (sband) {
1634                         /* init channel we're on */
1635                         local->hw.conf.channel =
1636                         local->oper_channel =
1637                         local->scan_channel = &sband->channels[0];
1638                         break;
1639                 }
1640         }
1641
1642         result = wiphy_register(local->hw.wiphy);
1643         if (result < 0)
1644                 return result;
1645
1646         /*
1647          * We use the number of queues for feature tests (QoS, HT) internally
1648          * so restrict them appropriately.
1649          */
1650         if (hw->queues > IEEE80211_MAX_QUEUES)
1651                 hw->queues = IEEE80211_MAX_QUEUES;
1652         if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1653                 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1654         if (hw->queues < 4)
1655                 hw->ampdu_queues = 0;
1656
1657         mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1658                                "wmaster%d", ether_setup,
1659                                ieee80211_num_queues(hw));
1660         if (!mdev)
1661                 goto fail_mdev_alloc;
1662
1663         mwdev = netdev_priv(mdev);
1664         mdev->ieee80211_ptr = mwdev;
1665         mwdev->wiphy = local->hw.wiphy;
1666
1667         local->mdev = mdev;
1668
1669         ieee80211_rx_bss_list_init(local);
1670
1671         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1672         mdev->open = ieee80211_master_open;
1673         mdev->stop = ieee80211_master_stop;
1674         mdev->type = ARPHRD_IEEE80211;
1675         mdev->header_ops = &ieee80211_header_ops;
1676         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1677
1678         name = wiphy_dev(local->hw.wiphy)->driver->name;
1679         local->hw.workqueue = create_freezeable_workqueue(name);
1680         if (!local->hw.workqueue) {
1681                 result = -ENOMEM;
1682                 goto fail_workqueue;
1683         }
1684
1685         /*
1686          * The hardware needs headroom for sending the frame,
1687          * and we need some headroom for passing the frame to monitor
1688          * interfaces, but never both at the same time.
1689          */
1690         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1691                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1692
1693         debugfs_hw_add(local);
1694
1695         if (local->hw.conf.beacon_int < 10)
1696                 local->hw.conf.beacon_int = 100;
1697
1698         if (local->hw.max_listen_interval == 0)
1699                 local->hw.max_listen_interval = 1;
1700
1701         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1702
1703         local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1704                                                   IEEE80211_HW_SIGNAL_DB |
1705                                                   IEEE80211_HW_SIGNAL_DBM) ?
1706                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1707         local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1708                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1709         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1710                 local->wstats_flags |= IW_QUAL_DBM;
1711
1712         result = sta_info_start(local);
1713         if (result < 0)
1714                 goto fail_sta_info;
1715
1716         rtnl_lock();
1717         result = dev_alloc_name(local->mdev, local->mdev->name);
1718         if (result < 0)
1719                 goto fail_dev;
1720
1721         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1722         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1723
1724         result = register_netdevice(local->mdev);
1725         if (result < 0)
1726                 goto fail_dev;
1727
1728         result = ieee80211_init_rate_ctrl_alg(local,
1729                                               hw->rate_control_algorithm);
1730         if (result < 0) {
1731                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1732                        "algorithm\n", wiphy_name(local->hw.wiphy));
1733                 goto fail_rate;
1734         }
1735
1736         result = ieee80211_wep_init(local);
1737
1738         if (result < 0) {
1739                 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
1740                        wiphy_name(local->hw.wiphy), result);
1741                 goto fail_wep;
1742         }
1743
1744         local->mdev->select_queue = ieee80211_select_queue;
1745
1746         /* add one default STA interface */
1747         result = ieee80211_if_add(local, "wlan%d", NULL,
1748                                   IEEE80211_IF_TYPE_STA, NULL);
1749         if (result)
1750                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1751                        wiphy_name(local->hw.wiphy));
1752
1753         rtnl_unlock();
1754
1755         ieee80211_led_init(local);
1756
1757         return 0;
1758
1759 fail_wep:
1760         rate_control_deinitialize(local);
1761 fail_rate:
1762         unregister_netdevice(local->mdev);
1763         local->mdev = NULL;
1764 fail_dev:
1765         rtnl_unlock();
1766         sta_info_stop(local);
1767 fail_sta_info:
1768         debugfs_hw_del(local);
1769         destroy_workqueue(local->hw.workqueue);
1770 fail_workqueue:
1771         if (local->mdev)
1772                 free_netdev(local->mdev);
1773 fail_mdev_alloc:
1774         wiphy_unregister(local->hw.wiphy);
1775         return result;
1776 }
1777 EXPORT_SYMBOL(ieee80211_register_hw);
1778
1779 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1780 {
1781         struct ieee80211_local *local = hw_to_local(hw);
1782
1783         tasklet_kill(&local->tx_pending_tasklet);
1784         tasklet_kill(&local->tasklet);
1785
1786         rtnl_lock();
1787
1788         /*
1789          * At this point, interface list manipulations are fine
1790          * because the driver cannot be handing us frames any
1791          * more and the tasklet is killed.
1792          */
1793
1794         /* First, we remove all virtual interfaces. */
1795         ieee80211_remove_interfaces(local);
1796
1797         /* then, finally, remove the master interface */
1798         unregister_netdevice(local->mdev);
1799
1800         rtnl_unlock();
1801
1802         ieee80211_rx_bss_list_deinit(local);
1803         ieee80211_clear_tx_pending(local);
1804         sta_info_stop(local);
1805         rate_control_deinitialize(local);
1806         debugfs_hw_del(local);
1807
1808         if (skb_queue_len(&local->skb_queue)
1809                         || skb_queue_len(&local->skb_queue_unreliable))
1810                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1811                        wiphy_name(local->hw.wiphy));
1812         skb_queue_purge(&local->skb_queue);
1813         skb_queue_purge(&local->skb_queue_unreliable);
1814
1815         destroy_workqueue(local->hw.workqueue);
1816         wiphy_unregister(local->hw.wiphy);
1817         ieee80211_wep_free(local);
1818         ieee80211_led_exit(local);
1819         free_netdev(local->mdev);
1820 }
1821 EXPORT_SYMBOL(ieee80211_unregister_hw);
1822
1823 void ieee80211_free_hw(struct ieee80211_hw *hw)
1824 {
1825         struct ieee80211_local *local = hw_to_local(hw);
1826
1827         wiphy_free(local->hw.wiphy);
1828 }
1829 EXPORT_SYMBOL(ieee80211_free_hw);
1830
1831 static int __init ieee80211_init(void)
1832 {
1833         struct sk_buff *skb;
1834         int ret;
1835
1836         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1837         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1838                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1839
1840         ret = rc80211_pid_init();
1841         if (ret)
1842                 return ret;
1843
1844         ieee80211_debugfs_netdev_init();
1845
1846         return 0;
1847 }
1848
1849 static void __exit ieee80211_exit(void)
1850 {
1851         rc80211_pid_exit();
1852
1853         /*
1854          * For key todo, it'll be empty by now but the work
1855          * might still be scheduled.
1856          */
1857         flush_scheduled_work();
1858
1859         if (mesh_allocated)
1860                 ieee80211s_stop();
1861
1862         ieee80211_debugfs_netdev_exit();
1863 }
1864
1865
1866 subsys_initcall(ieee80211_init);
1867 module_exit(ieee80211_exit);
1868
1869 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1870 MODULE_LICENSE("GPL");