err.no 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 (sdata->dev != dev && netif_running(sdata->dev)) {
 109                         res = 0;
 110                         break;
 111                 }
 112         }
 113
 114         if (res)
 115                 return res;
 116
 117         netif_start_queue(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 (sdata->dev != dev && 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 && ndev != local->mdev && 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                          * Disallow multiple IBSS/STA mode interfaces.
 214                          *
 215                          * This is a technical restriction, it is possible although
 216                          * most likely not IEEE 802.11 compliant to have multiple
 217                          * STAs with just a single hardware (the TSF timer will not
 218                          * be adjusted properly.)
 219                          *
 220                          * However, because mac80211 uses the master device's BSS
 221                          * information for each STA/IBSS interface, doing this will
 222                          * currently corrupt that BSS information completely, unless,
 223                          * a not very useful case, both STAs are associated to the
 224                          * same BSS.
 225                          *
 226                          * To remove this restriction, the BSS information needs to
 227                          * be embedded in the STA/IBSS mode sdata instead of using
 228                          * the master device's BSS structure.
 229                          */
 230                         if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 231                              sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
 232                             (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
 233                              nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
 234                                 return -EBUSY;
 235
 236                         /*
 237                          * The remaining checks are only performed for interfaces
 238                          * with the same MAC address.
 239                          */
 240                         if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
 241                                 continue;
 242
 243                         /*
 244                          * check whether it may have the same address
 245                          */
 246                         if (!identical_mac_addr_allowed(sdata->vif.type,
 247                                                         nsdata->vif.type))
 248                                 return -ENOTUNIQ;
 249
 250                         /*
 251                          * can only add VLANs to enabled APs
 252                          */
 253                         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
 254                             nsdata->vif.type == IEEE80211_IF_TYPE_AP)
 255                                 sdata->u.vlan.ap = nsdata;
 256                 }
 257         }
 258
 259         switch (sdata->vif.type) {
 260         case IEEE80211_IF_TYPE_WDS:
 261                 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
 262                         return -ENOLINK;
 263                 break;
 264         case IEEE80211_IF_TYPE_VLAN:
 265                 if (!sdata->u.vlan.ap)
 266                         return -ENOLINK;
 267                 break;
 268         case IEEE80211_IF_TYPE_AP:
 269         case IEEE80211_IF_TYPE_STA:
 270         case IEEE80211_IF_TYPE_MNTR:
 271         case IEEE80211_IF_TYPE_IBSS:
 272         case IEEE80211_IF_TYPE_MESH_POINT:
 273                 /* no special treatment */
 274                 break;
 275         case IEEE80211_IF_TYPE_INVALID:
 276                 /* cannot happen */
 277                 WARN_ON(1);
 278                 break;
 279         }
 280
 281         if (local->open_count == 0) {
 282                 res = 0;
 283                 if (local->ops->start)
 284                         res = local->ops->start(local_to_hw(local));
 285                 if (res)
 286                         return res;
 287                 need_hw_reconfig = 1;
 288                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 289         }
 290
 291         switch (sdata->vif.type) {
 292         case IEEE80211_IF_TYPE_VLAN:
 293                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
 294                 /* no need to tell driver */
 295                 break;
 296         case IEEE80211_IF_TYPE_MNTR:
 297                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 298                         local->cooked_mntrs++;
 299                         break;
 300                 }
 301
 302                 /* must be before the call to ieee80211_configure_filter */
 303                 local->monitors++;
 304                 if (local->monitors == 1)
 305                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 306
 307                 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
 308                         local->fif_fcsfail++;
 309                 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
 310                         local->fif_plcpfail++;
 311                 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
 312                         local->fif_control++;
 313                 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
 314                         local->fif_other_bss++;
 315
 316                 netif_tx_lock_bh(local->mdev);
 317                 ieee80211_configure_filter(local);
 318                 netif_tx_unlock_bh(local->mdev);
 319                 break;
 320         case IEEE80211_IF_TYPE_STA:
 321         case IEEE80211_IF_TYPE_IBSS:
 322                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 323                 /* fall through */
 324         default:
 325                 conf.vif = &sdata->vif;
 326                 conf.type = sdata->vif.type;
 327                 conf.mac_addr = dev->dev_addr;
 328                 res = local->ops->add_interface(local_to_hw(local), &conf);
 329                 if (res)
 330                         goto err_stop;
 331
 332                 ieee80211_if_config(dev);
 333                 changed |= ieee80211_reset_erp_info(dev);
 334                 ieee80211_bss_info_change_notify(sdata, changed);
 335                 ieee80211_enable_keys(sdata);
 336
 337                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
 338                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
 339                         netif_carrier_off(dev);
 340                 else
 341                         netif_carrier_on(dev);
 342         }
 343
 344         if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
 345                 /* Create STA entry for the WDS peer */
 346                 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
 347                                      GFP_KERNEL);
 348                 if (!sta) {
 349                         res = -ENOMEM;
 350                         goto err_del_interface;
 351                 }
 352
 353                 /* no locking required since STA is not live yet */
 354                 sta->flags |= WLAN_STA_AUTHORIZED;
 355
 356                 res = sta_info_insert(sta);
 357                 if (res) {
 358                         /* STA has been freed */
 359                         goto err_del_interface;
 360                 }
 361         }
 362
 363         if (local->open_count == 0) {
 364                 res = dev_open(local->mdev);
 365                 WARN_ON(res);
 366                 if (res)
 367                         goto err_del_interface;
 368                 tasklet_enable(&local->tx_pending_tasklet);
 369                 tasklet_enable(&local->tasklet);
 370         }
 371
 372         /*
 373          * set_multicast_list will be invoked by the networking core
 374          * which will check whether any increments here were done in
 375          * error and sync them down to the hardware as filter flags.
 376          */
 377         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 378                 atomic_inc(&local->iff_allmultis);
 379
 380         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 381                 atomic_inc(&local->iff_promiscs);
 382
 383         local->open_count++;
 384         if (need_hw_reconfig)
 385                 ieee80211_hw_config(local);
 386
 387         /*
 388          * ieee80211_sta_work is disabled while network interface
 389          * is down. Therefore, some configuration changes may not
 390          * yet be effective. Trigger execution of ieee80211_sta_work
 391          * to fix this.
 392          */
 393         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 394             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 395                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 396                 queue_work(local->hw.workqueue, &ifsta->work);
 397         }
 398
 399         netif_start_queue(dev);
 400
 401         return 0;
 402  err_del_interface:
 403         local->ops->remove_interface(local_to_hw(local), &conf);
 404  err_stop:
 405         if (!local->open_count && local->ops->stop)
 406                 local->ops->stop(local_to_hw(local));
 407         return res;
 408 }
 409
 410 static int ieee80211_stop(struct net_device *dev)
 411 {
 412         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 413         struct ieee80211_local *local = sdata->local;
 414         struct ieee80211_if_init_conf conf;
 415         struct sta_info *sta;
 416
 417         /*
 418          * Stop TX on this interface first.
 419          */
 420         netif_stop_queue(dev);
 421
 422         /*
 423          * Now delete all active aggregation sessions.
 424          */
 425         rcu_read_lock();
 426
 427         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 428                 if (sta->sdata == sdata)
 429                         ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
 430         }
 431
 432         rcu_read_unlock();
 433
 434         /*
 435          * Remove all stations associated with this interface.
 436          *
 437          * This must be done before calling ops->remove_interface()
 438          * because otherwise we can later invoke ops->sta_notify()
 439          * whenever the STAs are removed, and that invalidates driver
 440          * assumptions about always getting a vif pointer that is valid
 441          * (because if we remove a STA after ops->remove_interface()
 442          * the driver will have removed the vif info already!)
 443          *
 444          * We could relax this and only unlink the stations from the
 445          * hash table and list but keep them on a per-sdata list that
 446          * will be inserted back again when the interface is brought
 447          * up again, but I don't currently see a use case for that,
 448          * except with WDS which gets a STA entry created when it is
 449          * brought up.
 450          */
 451         sta_info_flush(local, sdata);
 452
 453         /*
 454          * Don't count this interface for promisc/allmulti while it
 455          * is down. dev_mc_unsync() will invoke set_multicast_list
 456          * on the master interface which will sync these down to the
 457          * hardware as filter flags.
 458          */
 459         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 460                 atomic_dec(&local->iff_allmultis);
 461
 462         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 463                 atomic_dec(&local->iff_promiscs);
 464
 465         dev_mc_unsync(local->mdev, dev);
 466
 467         /* APs need special treatment */
 468         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 469                 struct ieee80211_sub_if_data *vlan, *tmp;
 470                 struct beacon_data *old_beacon = sdata->u.ap.beacon;
 471
 472                 /* remove beacon */
 473                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 474                 synchronize_rcu();
 475                 kfree(old_beacon);
 476
 477                 /* down all dependent devices, that is VLANs */
 478                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 479                                          u.vlan.list)
 480                         dev_close(vlan->dev);
 481                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 482         }
 483
 484         local->open_count--;
 485
 486         switch (sdata->vif.type) {
 487         case IEEE80211_IF_TYPE_VLAN:
 488                 list_del(&sdata->u.vlan.list);
 489                 sdata->u.vlan.ap = NULL;
 490                 /* no need to tell driver */
 491                 break;
 492         case IEEE80211_IF_TYPE_MNTR:
 493                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 494                         local->cooked_mntrs--;
 495                         break;
 496                 }
 497
 498                 local->monitors--;
 499                 if (local->monitors == 0)
 500                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 501
 502                 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
 503                         local->fif_fcsfail--;
 504                 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
 505                         local->fif_plcpfail--;
 506                 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
 507                         local->fif_control--;
 508                 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
 509                         local->fif_other_bss--;
 510
 511                 netif_tx_lock_bh(local->mdev);
 512                 ieee80211_configure_filter(local);
 513                 netif_tx_unlock_bh(local->mdev);
 514                 break;
 515         case IEEE80211_IF_TYPE_MESH_POINT:
 516         case IEEE80211_IF_TYPE_STA:
 517         case IEEE80211_IF_TYPE_IBSS:
 518                 sdata->u.sta.state = IEEE80211_DISABLED;
 519                 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
 520                 del_timer_sync(&sdata->u.sta.timer);
 521                 /*
 522                  * When we get here, the interface is marked down.
 523                  * Call synchronize_rcu() to wait for the RX path
 524                  * should it be using the interface and enqueuing
 525                  * frames at this very time on another CPU.
 526                  */
 527                 synchronize_rcu();
 528                 skb_queue_purge(&sdata->u.sta.skb_queue);
 529
 530                 if (local->scan_dev == sdata->dev) {
 531                         if (!local->ops->hw_scan) {
 532                                 local->sta_sw_scanning = 0;
 533                                 cancel_delayed_work(&local->scan_work);
 534                         } else
 535                                 local->sta_hw_scanning = 0;
 536                 }
 537
 538                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 539                 kfree(sdata->u.sta.extra_ie);
 540                 sdata->u.sta.extra_ie = NULL;
 541                 sdata->u.sta.extra_ie_len = 0;
 542                 /* fall through */
 543         default:
 544                 conf.vif = &sdata->vif;
 545                 conf.type = sdata->vif.type;
 546                 conf.mac_addr = dev->dev_addr;
 547                 /* disable all keys for as long as this netdev is down */
 548                 ieee80211_disable_keys(sdata);
 549                 local->ops->remove_interface(local_to_hw(local), &conf);
 550         }
 551
 552         if (local->open_count == 0) {
 553                 if (netif_running(local->mdev))
 554                         dev_close(local->mdev);
 555
 556                 if (local->ops->stop)
 557                         local->ops->stop(local_to_hw(local));
 558
 559                 ieee80211_led_radio(local, 0);
 560
 561                 flush_workqueue(local->hw.workqueue);
 562
 563                 tasklet_disable(&local->tx_pending_tasklet);
 564                 tasklet_disable(&local->tasklet);
 565         }
 566
 567         return 0;
 568 }
 569
 570 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 571 {
 572         struct ieee80211_local *local = hw_to_local(hw);
 573         struct netdev_queue *txq;
 574         struct sta_info *sta;
 575         struct ieee80211_sub_if_data *sdata;
 576         u16 start_seq_num = 0;
 577         u8 *state;
 578         int ret;
 579         DECLARE_MAC_BUF(mac);
 580
 581         if (tid >= STA_TID_NUM)
 582                 return -EINVAL;
 583
 584 #ifdef CONFIG_MAC80211_HT_DEBUG
 585         printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
 586                                 print_mac(mac, ra), tid);
 587 #endif /* CONFIG_MAC80211_HT_DEBUG */
 588
 589         rcu_read_lock();
 590
 591         sta = sta_info_get(local, ra);
 592         if (!sta) {
 593 #ifdef CONFIG_MAC80211_HT_DEBUG
 594                 printk(KERN_DEBUG "Could not find the station\n");
 595 #endif
 596                 ret = -ENOENT;
 597                 goto exit;
 598         }
 599
 600         spin_lock_bh(&sta->lock);
 601
 602         /* we have tried too many times, receiver does not want A-MPDU */
 603         if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
 604                 ret = -EBUSY;
 605                 goto err_unlock_sta;
 606         }
 607
 608         state = &sta->ampdu_mlme.tid_state_tx[tid];
 609         /* check if the TID is not in aggregation flow already */
 610         if (*state != HT_AGG_STATE_IDLE) {
 611 #ifdef CONFIG_MAC80211_HT_DEBUG
 612                 printk(KERN_DEBUG "BA request denied - session is not "
 613                                  "idle on tid %u\n", tid);
 614 #endif /* CONFIG_MAC80211_HT_DEBUG */
 615                 ret = -EAGAIN;
 616                 goto err_unlock_sta;
 617         }
 618
 619         /* prepare A-MPDU MLME for Tx aggregation */
 620         sta->ampdu_mlme.tid_tx[tid] =
 621                         kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
 622         if (!sta->ampdu_mlme.tid_tx[tid]) {
 623 #ifdef CONFIG_MAC80211_HT_DEBUG
 624                 if (net_ratelimit())
 625                         printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
 626                                         tid);
 627 #endif
 628                 ret = -ENOMEM;
 629                 goto err_unlock_sta;
 630         }
 631         /* Tx timer */
 632         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
 633                         sta_addba_resp_timer_expired;
 634         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
 635                         (unsigned long)&sta->timer_to_tid[tid];
 636         init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
 637
 638         /* ensure that TX flow won't interrupt us
 639          * until the end of the call to requeue function */
 640         txq = &local->mdev->tx_queue;
 641         spin_lock_bh(&txq->lock);
 642
 643         /* create a new queue for this aggregation */
 644         ret = ieee80211_ht_agg_queue_add(local, sta, tid);
 645
 646         /* case no queue is available to aggregation
 647          * don't switch to aggregation */
 648         if (ret) {
 649 #ifdef CONFIG_MAC80211_HT_DEBUG
 650                 printk(KERN_DEBUG "BA request denied - queue unavailable for"
 651                                         " tid %d\n", tid);
 652 #endif /* CONFIG_MAC80211_HT_DEBUG */
 653                 goto err_unlock_queue;
 654         }
 655         sdata = sta->sdata;
 656
 657         /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
 658          * call back right away, it must see that the flow has begun */
 659         *state |= HT_ADDBA_REQUESTED_MSK;
 660
 661         if (local->ops->ampdu_action)
 662                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
 663                                                 ra, tid, &start_seq_num);
 664
 665         if (ret) {
 666                 /* No need to requeue the packets in the agg queue, since we
 667                  * held the tx lock: no packet could be enqueued to the newly
 668                  * allocated queue */
 669                  ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
 670 #ifdef CONFIG_MAC80211_HT_DEBUG
 671                 printk(KERN_DEBUG "BA request denied - HW unavailable for"
 672                                         " tid %d\n", tid);
 673 #endif /* CONFIG_MAC80211_HT_DEBUG */
 674                 *state = HT_AGG_STATE_IDLE;
 675                 goto err_unlock_queue;
 676         }
 677
 678         /* Will put all the packets in the new SW queue */
 679         ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
 680         spin_unlock_bh(&txq->lock);
 681         spin_unlock_bh(&sta->lock);
 682
 683         /* send an addBA request */
 684         sta->ampdu_mlme.dialog_token_allocator++;
 685         sta->ampdu_mlme.tid_tx[tid]->dialog_token =
 686                         sta->ampdu_mlme.dialog_token_allocator;
 687         sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
 688
 689
 690         ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
 691                          sta->ampdu_mlme.tid_tx[tid]->dialog_token,
 692                          sta->ampdu_mlme.tid_tx[tid]->ssn,
 693                          0x40, 5000);
 694         /* activate the timer for the recipient's addBA response */
 695         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
 696                                 jiffies + ADDBA_RESP_INTERVAL;
 697         add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
 698 #ifdef CONFIG_MAC80211_HT_DEBUG
 699         printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
 700 #endif
 701         goto exit;
 702
 703 err_unlock_queue:
 704         kfree(sta->ampdu_mlme.tid_tx[tid]);
 705         sta->ampdu_mlme.tid_tx[tid] = NULL;
 706         spin_unlock_bh(&txq->lock);
 707         ret = -EBUSY;
 708 err_unlock_sta:
 709         spin_unlock_bh(&sta->lock);
 710 exit:
 711         rcu_read_unlock();
 712         return ret;
 713 }
 714 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
 715
 716 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
 717                                  u8 *ra, u16 tid,
 718                                  enum ieee80211_back_parties initiator)
 719 {
 720         struct ieee80211_local *local = hw_to_local(hw);
 721         struct sta_info *sta;
 722         u8 *state;
 723         int ret = 0;
 724         DECLARE_MAC_BUF(mac);
 725
 726         if (tid >= STA_TID_NUM)
 727                 return -EINVAL;
 728
 729         rcu_read_lock();
 730         sta = sta_info_get(local, ra);
 731         if (!sta) {
 732                 rcu_read_unlock();
 733                 return -ENOENT;
 734         }
 735
 736         /* check if the TID is in aggregation */
 737         state = &sta->ampdu_mlme.tid_state_tx[tid];
 738         spin_lock_bh(&sta->lock);
 739
 740         if (*state != HT_AGG_STATE_OPERATIONAL) {
 741                 ret = -ENOENT;
 742                 goto stop_BA_exit;
 743         }
 744
 745 #ifdef CONFIG_MAC80211_HT_DEBUG
 746         printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
 747                                 print_mac(mac, ra), tid);
 748 #endif /* CONFIG_MAC80211_HT_DEBUG */
 749
 750         ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
 751
 752         *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
 753                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
 754
 755         if (local->ops->ampdu_action)
 756                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
 757                                                 ra, tid, NULL);
 758
 759         /* case HW denied going back to legacy */
 760         if (ret) {
 761                 WARN_ON(ret != -EBUSY);
 762                 *state = HT_AGG_STATE_OPERATIONAL;
 763                 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 764                 goto stop_BA_exit;
 765         }
 766
 767 stop_BA_exit:
 768         spin_unlock_bh(&sta->lock);
 769         rcu_read_unlock();
 770         return ret;
 771 }
 772 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
 773
 774 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 775 {
 776         struct ieee80211_local *local = hw_to_local(hw);
 777         struct sta_info *sta;
 778         u8 *state;
 779         DECLARE_MAC_BUF(mac);
 780
 781         if (tid >= STA_TID_NUM) {
 782 #ifdef CONFIG_MAC80211_HT_DEBUG
 783                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
 784                                 tid, STA_TID_NUM);
 785 #endif
 786                 return;
 787         }
 788
 789         rcu_read_lock();
 790         sta = sta_info_get(local, ra);
 791         if (!sta) {
 792                 rcu_read_unlock();
 793 #ifdef CONFIG_MAC80211_HT_DEBUG
 794                 printk(KERN_DEBUG "Could not find station: %s\n",
 795                                 print_mac(mac, ra));
 796 #endif
 797                 return;
 798         }
 799
 800         state = &sta->ampdu_mlme.tid_state_tx[tid];
 801         spin_lock_bh(&sta->lock);
 802
 803         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
 804 #ifdef CONFIG_MAC80211_HT_DEBUG
 805                 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
 806                                 *state);
 807 #endif
 808                 spin_unlock_bh(&sta->lock);
 809                 rcu_read_unlock();
 810                 return;
 811         }
 812
 813         WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
 814
 815         *state |= HT_ADDBA_DRV_READY_MSK;
 816
 817         if (*state == HT_AGG_STATE_OPERATIONAL) {
 818 #ifdef CONFIG_MAC80211_HT_DEBUG
 819                 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
 820 #endif
 821                 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 822         }
 823         spin_unlock_bh(&sta->lock);
 824         rcu_read_unlock();
 825 }
 826 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
 827
 828 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
 829 {
 830         struct ieee80211_local *local = hw_to_local(hw);
 831         struct netdev_queue *txq;
 832         struct sta_info *sta;
 833         u8 *state;
 834         int agg_queue;
 835         DECLARE_MAC_BUF(mac);
 836
 837         if (tid >= STA_TID_NUM) {
 838 #ifdef CONFIG_MAC80211_HT_DEBUG
 839                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
 840                                 tid, STA_TID_NUM);
 841 #endif
 842                 return;
 843         }
 844
 845 #ifdef CONFIG_MAC80211_HT_DEBUG
 846         printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
 847                                 print_mac(mac, ra), tid);
 848 #endif /* CONFIG_MAC80211_HT_DEBUG */
 849
 850         rcu_read_lock();
 851         sta = sta_info_get(local, ra);
 852         if (!sta) {
 853 #ifdef CONFIG_MAC80211_HT_DEBUG
 854                 printk(KERN_DEBUG "Could not find station: %s\n",
 855                                 print_mac(mac, ra));
 856 #endif
 857                 rcu_read_unlock();
 858                 return;
 859         }
 860         state = &sta->ampdu_mlme.tid_state_tx[tid];
 861
 862         /* NOTE: no need to use sta->lock in this state check, as
 863          * ieee80211_stop_tx_ba_session will let only
 864          * one stop call to pass through per sta/tid */
 865         if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
 866 #ifdef CONFIG_MAC80211_HT_DEBUG
 867                 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
 868 #endif
 869                 rcu_read_unlock();
 870                 return;
 871         }
 872
 873         if (*state & HT_AGG_STATE_INITIATOR_MSK)
 874                 ieee80211_send_delba(sta->sdata->dev, ra, tid,
 875                         WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
 876
 877         agg_queue = sta->tid_to_tx_q[tid];
 878
 879         /* avoid ordering issues: we are the only one that can modify
 880          * the content of the qdiscs */
 881         txq = &local->mdev->tx_queue;
 882         spin_lock_bh(&txq->lock);
 883         /* remove the queue for this aggregation */
 884         ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
 885         spin_unlock_bh(&txq->lock);
 886
 887         /* we just requeued the all the frames that were in the removed
 888          * queue, and since we might miss a softirq we do netif_schedule.
 889          * ieee80211_wake_queue is not used here as this queue is not
 890          * necessarily stopped */
 891         netif_schedule(local->mdev);
 892         spin_lock_bh(&sta->lock);
 893         *state = HT_AGG_STATE_IDLE;
 894         sta->ampdu_mlme.addba_req_num[tid] = 0;
 895         kfree(sta->ampdu_mlme.tid_tx[tid]);
 896         sta->ampdu_mlme.tid_tx[tid] = NULL;
 897         spin_unlock_bh(&sta->lock);
 898
 899         rcu_read_unlock();
 900 }
 901 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
 902
 903 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
 904                                       const u8 *ra, u16 tid)
 905 {
 906         struct ieee80211_local *local = hw_to_local(hw);
 907         struct ieee80211_ra_tid *ra_tid;
 908         struct sk_buff *skb = dev_alloc_skb(0);
 909
 910         if (unlikely(!skb)) {
 911 #ifdef CONFIG_MAC80211_HT_DEBUG
 912                 if (net_ratelimit())
 913                         printk(KERN_WARNING "%s: Not enough memory, "
 914                                "dropping start BA session", skb->dev->name);
 915 #endif
 916                 return;
 917         }
 918         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 919         memcpy(&ra_tid->ra, ra, ETH_ALEN);
 920         ra_tid->tid = tid;
 921
 922         skb->pkt_type = IEEE80211_ADDBA_MSG;
 923         skb_queue_tail(&local->skb_queue, skb);
 924         tasklet_schedule(&local->tasklet);
 925 }
 926 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
 927
 928 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
 929                                      const u8 *ra, u16 tid)
 930 {
 931         struct ieee80211_local *local = hw_to_local(hw);
 932         struct ieee80211_ra_tid *ra_tid;
 933         struct sk_buff *skb = dev_alloc_skb(0);
 934
 935         if (unlikely(!skb)) {
 936 #ifdef CONFIG_MAC80211_HT_DEBUG
 937                 if (net_ratelimit())
 938                         printk(KERN_WARNING "%s: Not enough memory, "
 939                                "dropping stop BA session", skb->dev->name);
 940 #endif
 941                 return;
 942         }
 943         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 944         memcpy(&ra_tid->ra, ra, ETH_ALEN);
 945         ra_tid->tid = tid;
 946
 947         skb->pkt_type = IEEE80211_DELBA_MSG;
 948         skb_queue_tail(&local->skb_queue, skb);
 949         tasklet_schedule(&local->tasklet);
 950 }
 951 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
 952
 953 static void ieee80211_set_multicast_list(struct net_device *dev)
 954 {
 955         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 956         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 957         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 958
 959         allmulti = !!(dev->flags & IFF_ALLMULTI);
 960         promisc = !!(dev->flags & IFF_PROMISC);
 961         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 962         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 963
 964         if (allmulti != sdata_allmulti) {
 965                 if (dev->flags & IFF_ALLMULTI)
 966                         atomic_inc(&local->iff_allmultis);
 967                 else
 968                         atomic_dec(&local->iff_allmultis);
 969                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 970         }
 971
 972         if (promisc != sdata_promisc) {
 973                 if (dev->flags & IFF_PROMISC)
 974                         atomic_inc(&local->iff_promiscs);
 975                 else
 976                         atomic_dec(&local->iff_promiscs);
 977                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 978         }
 979
 980         dev_mc_sync(local->mdev, dev);
 981 }
 982
 983 static const struct header_ops ieee80211_header_ops = {
 984         .create         = eth_header,
 985         .parse          = header_parse_80211,
 986         .rebuild        = eth_rebuild_header,
 987         .cache          = eth_header_cache,
 988         .cache_update   = eth_header_cache_update,
 989 };
 990
 991 /* Must not be called for mdev */
 992 void ieee80211_if_setup(struct net_device *dev)
 993 {
 994         ether_setup(dev);
 995         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 996         dev->wireless_handlers = &ieee80211_iw_handler_def;
 997         dev->set_multicast_list = ieee80211_set_multicast_list;
 998         dev->change_mtu = ieee80211_change_mtu;
 999         dev->open = ieee80211_open;
1000         dev->stop = ieee80211_stop;
1001         dev->destructor = ieee80211_if_free;
1002 }
1003
1004 /* everything else */
1005
1006 static int __ieee80211_if_config(struct net_device *dev,
1007                                  struct sk_buff *beacon)
1008 {
1009         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1010         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1011         struct ieee80211_if_conf conf;
1012
1013         if (!local->ops->config_interface || !netif_running(dev))
1014                 return 0;
1015
1016         memset(&conf, 0, sizeof(conf));
1017         conf.type = sdata->vif.type;
1018         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1019             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1020                 conf.bssid = sdata->u.sta.bssid;
1021                 conf.ssid = sdata->u.sta.ssid;
1022                 conf.ssid_len = sdata->u.sta.ssid_len;
1023         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1024                 conf.beacon = beacon;
1025                 ieee80211_start_mesh(dev);
1026         } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1027                 conf.ssid = sdata->u.ap.ssid;
1028                 conf.ssid_len = sdata->u.ap.ssid_len;
1029                 conf.beacon = beacon;
1030         }
1031         return local->ops->config_interface(local_to_hw(local),
1032                                             &sdata->vif, &conf);
1033 }
1034
1035 int ieee80211_if_config(struct net_device *dev)
1036 {
1037         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1038         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1039         if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
1040             (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1041                 return ieee80211_if_config_beacon(dev);
1042         return __ieee80211_if_config(dev, NULL);
1043 }
1044
1045 int ieee80211_if_config_beacon(struct net_device *dev)
1046 {
1047         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1048         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1049         struct sk_buff *skb;
1050
1051         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1052                 return 0;
1053         skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif);
1054         if (!skb)
1055                 return -ENOMEM;
1056         return __ieee80211_if_config(dev, skb);
1057 }
1058
1059 int ieee80211_hw_config(struct ieee80211_local *local)
1060 {
1061         struct ieee80211_channel *chan;
1062         int ret = 0;
1063
1064         if (local->sta_sw_scanning)
1065                 chan = local->scan_channel;
1066         else
1067                 chan = local->oper_channel;
1068
1069         local->hw.conf.channel = chan;
1070
1071         if (!local->hw.conf.power_level)
1072                 local->hw.conf.power_level = chan->max_power;
1073         else
1074                 local->hw.conf.power_level = min(chan->max_power,
1075                                                local->hw.conf.power_level);
1076
1077         local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1078
1079 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1080         printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1081                wiphy_name(local->hw.wiphy), chan->center_freq);
1082 #endif
1083
1084         if (local->open_count)
1085                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1086
1087         return ret;
1088 }
1089
1090 /**
1091  * ieee80211_handle_ht should be used only after legacy configuration
1092  * has been determined namely band, as ht configuration depends upon
1093  * the hardware's HT abilities for a _specific_ band.
1094  */
1095 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1096                            struct ieee80211_ht_info *req_ht_cap,
1097                            struct ieee80211_ht_bss_info *req_bss_cap)
1098 {
1099         struct ieee80211_conf *conf = &local->hw.conf;
1100         struct ieee80211_supported_band *sband;
1101         struct ieee80211_ht_info ht_conf;
1102         struct ieee80211_ht_bss_info ht_bss_conf;
1103         u32 changed = 0;
1104         int i;
1105         u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1106         u8 tx_mcs_set_cap;
1107
1108         sband = local->hw.wiphy->bands[conf->channel->band];
1109
1110         memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1111         memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1112
1113         /* HT is not supported */
1114         if (!sband->ht_info.ht_supported) {
1115                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1116                 goto out;
1117         }
1118
1119         /* disable HT */
1120         if (!enable_ht) {
1121                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1122                         changed |= BSS_CHANGED_HT;
1123                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1124                 conf->ht_conf.ht_supported = 0;
1125                 goto out;
1126         }
1127
1128
1129         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1130                 changed |= BSS_CHANGED_HT;
1131
1132         conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1133         ht_conf.ht_supported = 1;
1134
1135         ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1136         ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1137         ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1138         ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1139         ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1140         ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1141
1142         ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1143         ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1144
1145         /* Bits 96-100 */
1146         tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1147
1148         /* configure suppoerted Tx MCS according to requested MCS
1149          * (based in most cases on Rx capabilities of peer) and self
1150          * Tx MCS capabilities (as defined by low level driver HW
1151          * Tx capabilities) */
1152         if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1153                 goto check_changed;
1154
1155         /* Counting from 0 therfore + 1 */
1156         if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1157                 max_tx_streams = ((tx_mcs_set_cap &
1158                                 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1159
1160         for (i = 0; i < max_tx_streams; i++)
1161                 ht_conf.supp_mcs_set[i] =
1162                         sband->ht_info.supp_mcs_set[i] &
1163                                         req_ht_cap->supp_mcs_set[i];
1164
1165         if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1166                 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1167                      i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1168                         ht_conf.supp_mcs_set[i] =
1169                                 sband->ht_info.supp_mcs_set[i] &
1170                                         req_ht_cap->supp_mcs_set[i];
1171
1172 check_changed:
1173         /* if bss configuration changed store the new one */
1174         if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1175             memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1176                 changed |= BSS_CHANGED_HT;
1177                 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1178                 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1179         }
1180 out:
1181         return changed;
1182 }
1183
1184 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1185                                       u32 changed)
1186 {
1187         struct ieee80211_local *local = sdata->local;
1188
1189         if (!changed)
1190                 return;
1191
1192         if (local->ops->bss_info_changed)
1193                 local->ops->bss_info_changed(local_to_hw(local),
1194                                              &sdata->vif,
1195                                              &sdata->bss_conf,
1196                                              changed);
1197 }
1198
1199 u32 ieee80211_reset_erp_info(struct net_device *dev)
1200 {
1201         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1202
1203         sdata->bss_conf.use_cts_prot = 0;
1204         sdata->bss_conf.use_short_preamble = 0;
1205         return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
1206 }
1207
1208 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1209                                  struct sk_buff *skb)
1210 {
1211         struct ieee80211_local *local = hw_to_local(hw);
1212         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1213         int tmp;
1214
1215         skb->dev = local->mdev;
1216         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1217         skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1218                        &local->skb_queue : &local->skb_queue_unreliable, skb);
1219         tmp = skb_queue_len(&local->skb_queue) +
1220                 skb_queue_len(&local->skb_queue_unreliable);
1221         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1222                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1223                 dev_kfree_skb_irq(skb);
1224                 tmp--;
1225                 I802_DEBUG_INC(local->tx_status_drop);
1226         }
1227         tasklet_schedule(&local->tasklet);
1228 }
1229 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1230
1231 static void ieee80211_tasklet_handler(unsigned long data)
1232 {
1233         struct ieee80211_local *local = (struct ieee80211_local *) data;
1234         struct sk_buff *skb;
1235         struct ieee80211_rx_status rx_status;
1236         struct ieee80211_ra_tid *ra_tid;
1237
1238         while ((skb = skb_dequeue(&local->skb_queue)) ||
1239                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1240                 switch (skb->pkt_type) {
1241                 case IEEE80211_RX_MSG:
1242                         /* status is in skb->cb */
1243                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
1244                         /* Clear skb->pkt_type in order to not confuse kernel
1245                          * netstack. */
1246                         skb->pkt_type = 0;
1247                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1248                         break;
1249                 case IEEE80211_TX_STATUS_MSG:
1250                         skb->pkt_type = 0;
1251                         ieee80211_tx_status(local_to_hw(local), skb);
1252                         break;
1253                 case IEEE80211_DELBA_MSG:
1254                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1255                         ieee80211_stop_tx_ba_cb(local_to_hw(local),
1256                                                 ra_tid->ra, ra_tid->tid);
1257                         dev_kfree_skb(skb);
1258                         break;
1259                 case IEEE80211_ADDBA_MSG:
1260                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1261                         ieee80211_start_tx_ba_cb(local_to_hw(local),
1262                                                  ra_tid->ra, ra_tid->tid);
1263                         dev_kfree_skb(skb);
1264                         break ;
1265                 default:
1266                         WARN_ON(1);
1267                         dev_kfree_skb(skb);
1268                         break;
1269                 }
1270         }
1271 }
1272
1273 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1274  * make a prepared TX frame (one that has been given to hw) to look like brand
1275  * new IEEE 802.11 frame that is ready to go through TX processing again.
1276  * Also, tx_packet_data in cb is restored from tx_control. */
1277 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1278                                       struct ieee80211_key *key,
1279                                       struct sk_buff *skb)
1280 {
1281         int hdrlen, iv_len, mic_len;
1282         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1283
1284         info->flags &=  IEEE80211_TX_CTL_REQ_TX_STATUS |
1285                         IEEE80211_TX_CTL_DO_NOT_ENCRYPT |
1286                         IEEE80211_TX_CTL_REQUEUE |
1287                         IEEE80211_TX_CTL_EAPOL_FRAME;
1288
1289         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1290
1291         if (!key)
1292                 goto no_key;
1293
1294         switch (key->conf.alg) {
1295         case ALG_WEP:
1296                 iv_len = WEP_IV_LEN;
1297                 mic_len = WEP_ICV_LEN;
1298                 break;
1299         case ALG_TKIP:
1300                 iv_len = TKIP_IV_LEN;
1301                 mic_len = TKIP_ICV_LEN;
1302                 break;
1303         case ALG_CCMP:
1304                 iv_len = CCMP_HDR_LEN;
1305                 mic_len = CCMP_MIC_LEN;
1306                 break;
1307         default:
1308                 goto no_key;
1309         }
1310
1311         if (skb->len >= mic_len &&
1312             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1313                 skb_trim(skb, skb->len - mic_len);
1314         if (skb->len >= iv_len && skb->len > hdrlen) {
1315                 memmove(skb->data + iv_len, skb->data, hdrlen);
1316                 skb_pull(skb, iv_len);
1317         }
1318
1319 no_key:
1320         {
1321                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1322                 u16 fc = le16_to_cpu(hdr->frame_control);
1323                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1324                         fc &= ~IEEE80211_STYPE_QOS_DATA;
1325                         hdr->frame_control = cpu_to_le16(fc);
1326                         memmove(skb->data + 2, skb->data, hdrlen - 2);
1327                         skb_pull(skb, 2);
1328                 }
1329         }
1330 }
1331
1332 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1333                                             struct sta_info *sta,
1334                                             struct sk_buff *skb)
1335 {
1336         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1337
1338         sta->tx_filtered_count++;
1339
1340         /*
1341          * Clear the TX filter mask for this STA when sending the next
1342          * packet. If the STA went to power save mode, this will happen
1343          * when it wakes up for the next time.
1344          */
1345         set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1346
1347         /*
1348          * This code races in the following way:
1349          *
1350          *  (1) STA sends frame indicating it will go to sleep and does so
1351          *  (2) hardware/firmware adds STA to filter list, passes frame up
1352          *  (3) hardware/firmware processes TX fifo and suppresses a frame
1353          *  (4) we get TX status before having processed the frame and
1354          *      knowing that the STA has gone to sleep.
1355          *
1356          * This is actually quite unlikely even when both those events are
1357          * processed from interrupts coming in quickly after one another or
1358          * even at the same time because we queue both TX status events and
1359          * RX frames to be processed by a tasklet and process them in the
1360          * same order that they were received or TX status last. Hence, there
1361          * is no race as long as the frame RX is processed before the next TX
1362          * status, which drivers can ensure, see below.
1363          *
1364          * Note that this can only happen if the hardware or firmware can
1365          * actually add STAs to the filter list, if this is done by the
1366          * driver in response to set_tim() (which will only reduce the race
1367          * this whole filtering tries to solve, not completely solve it)
1368          * this situation cannot happen.
1369          *
1370          * To completely solve this race drivers need to make sure that they
1371          *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1372          *      functions and
1373          *  (b) always process RX events before TX status events if ordering
1374          *      can be unknown, for example with different interrupt status
1375          *      bits.
1376          */
1377         if (test_sta_flags(sta, WLAN_STA_PS) &&
1378             skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1379                 ieee80211_remove_tx_extra(local, sta->key, skb);
1380                 skb_queue_tail(&sta->tx_filtered, skb);
1381                 return;
1382         }
1383
1384         if (!test_sta_flags(sta, WLAN_STA_PS) &&
1385             !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1386                 /* Software retry the packet once */
1387                 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1388                 ieee80211_remove_tx_extra(local, sta->key, skb);
1389                 dev_queue_xmit(skb);
1390                 return;
1391         }
1392
1393 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1394         if (net_ratelimit())
1395                 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1396                        "queue_len=%d PS=%d @%lu\n",
1397                        wiphy_name(local->hw.wiphy),
1398                        skb_queue_len(&sta->tx_filtered),
1399                        !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1400 #endif
1401         dev_kfree_skb(skb);
1402 }
1403
1404 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1405 {
1406         struct sk_buff *skb2;
1407         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1408         struct ieee80211_local *local = hw_to_local(hw);
1409         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1410         u16 frag, type;
1411         __le16 fc;
1412         struct ieee80211_tx_status_rtap_hdr *rthdr;
1413         struct ieee80211_sub_if_data *sdata;
1414         struct net_device *prev_dev = NULL;
1415         struct sta_info *sta;
1416
1417         rcu_read_lock();
1418
1419         if (info->status.excessive_retries) {
1420                 sta = sta_info_get(local, hdr->addr1);
1421                 if (sta) {
1422                         if (test_sta_flags(sta, WLAN_STA_PS)) {
1423                                 /*
1424                                  * The STA is in power save mode, so assume
1425                                  * that this TX packet failed because of that.
1426                                  */
1427                                 ieee80211_handle_filtered_frame(local, sta, skb);
1428                                 rcu_read_unlock();
1429                                 return;
1430                         }
1431                 }
1432         }
1433
1434         fc = hdr->frame_control;
1435
1436         if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1437             (ieee80211_is_data_qos(fc))) {
1438                 u16 tid, ssn;
1439                 u8 *qc;
1440                 sta = sta_info_get(local, hdr->addr1);
1441                 if (sta) {
1442                         qc = ieee80211_get_qos_ctl(hdr);
1443                         tid = qc[0] & 0xf;
1444                         ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1445                                                 & IEEE80211_SCTL_SEQ);
1446                         ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
1447                                            tid, ssn);
1448                 }
1449         }
1450
1451         if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1452                 sta = sta_info_get(local, hdr->addr1);
1453                 if (sta) {
1454                         ieee80211_handle_filtered_frame(local, sta, skb);
1455                         rcu_read_unlock();
1456                         return;
1457                 }
1458         } else
1459                 rate_control_tx_status(local->mdev, skb);
1460
1461         rcu_read_unlock();
1462
1463         ieee80211_led_tx(local, 0);
1464
1465         /* SNMP counters
1466          * Fragments are passed to low-level drivers as separate skbs, so these
1467          * are actually fragments, not frames. Update frame counters only for
1468          * the first fragment of the frame. */
1469
1470         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1471         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1472
1473         if (info->flags & IEEE80211_TX_STAT_ACK) {
1474                 if (frag == 0) {
1475                         local->dot11TransmittedFrameCount++;
1476                         if (is_multicast_ether_addr(hdr->addr1))
1477                                 local->dot11MulticastTransmittedFrameCount++;
1478                         if (info->status.retry_count > 0)
1479                                 local->dot11RetryCount++;
1480                         if (info->status.retry_count > 1)
1481                                 local->dot11MultipleRetryCount++;
1482                 }
1483
1484                 /* This counter shall be incremented for an acknowledged MPDU
1485                  * with an individual address in the address 1 field or an MPDU
1486                  * with a multicast address in the address 1 field of type Data
1487                  * or Management. */
1488                 if (!is_multicast_ether_addr(hdr->addr1) ||
1489                     type == IEEE80211_FTYPE_DATA ||
1490                     type == IEEE80211_FTYPE_MGMT)
1491                         local->dot11TransmittedFragmentCount++;
1492         } else {
1493                 if (frag == 0)
1494                         local->dot11FailedCount++;
1495         }
1496
1497         /* this was a transmitted frame, but now we want to reuse it */
1498         skb_orphan(skb);
1499
1500         /*
1501          * This is a bit racy but we can avoid a lot of work
1502          * with this test...
1503          */
1504         if (!local->monitors && !local->cooked_mntrs) {
1505                 dev_kfree_skb(skb);
1506                 return;
1507         }
1508
1509         /* send frame to monitor interfaces now */
1510
1511         if (skb_headroom(skb) < sizeof(*rthdr)) {
1512                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1513                 dev_kfree_skb(skb);
1514                 return;
1515         }
1516
1517         rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1518                                 skb_push(skb, sizeof(*rthdr));
1519
1520         memset(rthdr, 0, sizeof(*rthdr));
1521         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1522         rthdr->hdr.it_present =
1523                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1524                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1525
1526         if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1527             !is_multicast_ether_addr(hdr->addr1))
1528                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1529
1530         if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1531             (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1532                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1533         else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1534                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1535
1536         rthdr->data_retries = info->status.retry_count;
1537
1538         /* XXX: is this sufficient for BPF? */
1539         skb_set_mac_header(skb, 0);
1540         skb->ip_summed = CHECKSUM_UNNECESSARY;
1541         skb->pkt_type = PACKET_OTHERHOST;
1542         skb->protocol = htons(ETH_P_802_2);
1543         memset(skb->cb, 0, sizeof(skb->cb));
1544
1545         rcu_read_lock();
1546         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1547                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1548                         if (!netif_running(sdata->dev))
1549                                 continue;
1550
1551                         if (prev_dev) {
1552                                 skb2 = skb_clone(skb, GFP_ATOMIC);
1553                                 if (skb2) {
1554                                         skb2->dev = prev_dev;
1555                                         netif_rx(skb2);
1556                                 }
1557                         }
1558
1559                         prev_dev = sdata->dev;
1560                 }
1561         }
1562         if (prev_dev) {
1563                 skb->dev = prev_dev;
1564                 netif_rx(skb);
1565                 skb = NULL;
1566         }
1567         rcu_read_unlock();
1568         dev_kfree_skb(skb);
1569 }
1570 EXPORT_SYMBOL(ieee80211_tx_status);
1571
1572 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1573                                         const struct ieee80211_ops *ops)
1574 {
1575         struct ieee80211_local *local;
1576         int priv_size;
1577         struct wiphy *wiphy;
1578
1579         /* Ensure 32-byte alignment of our private data and hw private data.
1580          * We use the wiphy priv data for both our ieee80211_local and for
1581          * the driver's private data
1582          *
1583          * In memory it'll be like this:
1584          *
1585          * +-------------------------+
1586          * | struct wiphy           |
1587          * +-------------------------+
1588          * | struct ieee80211_local  |
1589          * +-------------------------+
1590          * | driver's private data   |
1591          * +-------------------------+
1592          *
1593          */
1594         priv_size = ((sizeof(struct ieee80211_local) +
1595                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1596                     priv_data_len;
1597
1598         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1599
1600         if (!wiphy)
1601                 return NULL;
1602
1603         wiphy->privid = mac80211_wiphy_privid;
1604
1605         local = wiphy_priv(wiphy);
1606         local->hw.wiphy = wiphy;
1607
1608         local->hw.priv = (char *)local +
1609                          ((sizeof(struct ieee80211_local) +
1610                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1611
1612         BUG_ON(!ops->tx);
1613         BUG_ON(!ops->start);
1614         BUG_ON(!ops->stop);
1615         BUG_ON(!ops->config);
1616         BUG_ON(!ops->add_interface);
1617         BUG_ON(!ops->remove_interface);
1618         BUG_ON(!ops->configure_filter);
1619         local->ops = ops;
1620
1621         local->hw.queues = 1; /* default */
1622
1623         local->bridge_packets = 1;
1624
1625         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1626         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1627         local->short_retry_limit = 7;
1628         local->long_retry_limit = 4;
1629         local->hw.conf.radio_enabled = 1;
1630
1631         INIT_LIST_HEAD(&local->interfaces);
1632
1633         spin_lock_init(&local->key_lock);
1634
1635         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1636
1637         sta_info_init(local);
1638
1639         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1640                      (unsigned long)local);
1641         tasklet_disable(&local->tx_pending_tasklet);
1642
1643         tasklet_init(&local->tasklet,
1644                      ieee80211_tasklet_handler,
1645                      (unsigned long) local);
1646         tasklet_disable(&local->tasklet);
1647
1648         skb_queue_head_init(&local->skb_queue);
1649         skb_queue_head_init(&local->skb_queue_unreliable);
1650
1651         return local_to_hw(local);
1652 }
1653 EXPORT_SYMBOL(ieee80211_alloc_hw);
1654
1655 int ieee80211_register_hw(struct ieee80211_hw *hw)
1656 {
1657         struct ieee80211_local *local = hw_to_local(hw);
1658         const char *name;
1659         int result;
1660         enum ieee80211_band band;
1661         struct net_device *mdev;
1662         struct ieee80211_sub_if_data *sdata;
1663
1664         /*
1665          * generic code guarantees at least one band,
1666          * set this very early because much code assumes
1667          * that hw.conf.channel is assigned
1668          */
1669         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1670                 struct ieee80211_supported_band *sband;
1671
1672                 sband = local->hw.wiphy->bands[band];
1673                 if (sband) {
1674                         /* init channel we're on */
1675                         local->hw.conf.channel =
1676                         local->oper_channel =
1677                         local->scan_channel = &sband->channels[0];
1678                         break;
1679                 }
1680         }
1681
1682         result = wiphy_register(local->hw.wiphy);
1683         if (result < 0)
1684                 return result;
1685
1686         /*
1687          * We use the number of queues for feature tests (QoS, HT) internally
1688          * so restrict them appropriately.
1689          */
1690 #ifdef CONFIG_MAC80211_QOS
1691         if (hw->queues > IEEE80211_MAX_QUEUES)
1692                 hw->queues = IEEE80211_MAX_QUEUES;
1693         if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1694                 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1695         if (hw->queues < 4)
1696                 hw->ampdu_queues = 0;
1697 #else
1698         hw->queues = 1;
1699         hw->ampdu_queues = 0;
1700 #endif
1701
1702         /* for now, mdev needs sub_if_data :/ */
1703         mdev = alloc_netdev_mq(sizeof(struct ieee80211_sub_if_data),
1704                                "wmaster%d", ether_setup,
1705                                ieee80211_num_queues(hw));
1706         if (!mdev)
1707                 goto fail_mdev_alloc;
1708
1709         if (ieee80211_num_queues(hw) > 1)
1710                 mdev->features |= NETIF_F_MULTI_QUEUE;
1711
1712         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1713         mdev->ieee80211_ptr = &sdata->wdev;
1714         sdata->wdev.wiphy = local->hw.wiphy;
1715
1716         local->mdev = mdev;
1717
1718         ieee80211_rx_bss_list_init(mdev);
1719
1720         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1721         mdev->open = ieee80211_master_open;
1722         mdev->stop = ieee80211_master_stop;
1723         mdev->type = ARPHRD_IEEE80211;
1724         mdev->header_ops = &ieee80211_header_ops;
1725         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1726
1727         sdata->vif.type = IEEE80211_IF_TYPE_AP;
1728         sdata->dev = mdev;
1729         sdata->local = local;
1730         sdata->u.ap.force_unicast_rateidx = -1;
1731         sdata->u.ap.max_ratectrl_rateidx = -1;
1732         ieee80211_if_sdata_init(sdata);
1733
1734         /* no RCU needed since we're still during init phase */
1735         list_add_tail(&sdata->list, &local->interfaces);
1736
1737         name = wiphy_dev(local->hw.wiphy)->driver->name;
1738         local->hw.workqueue = create_freezeable_workqueue(name);
1739         if (!local->hw.workqueue) {
1740                 result = -ENOMEM;
1741                 goto fail_workqueue;
1742         }
1743
1744         /*
1745          * The hardware needs headroom for sending the frame,
1746          * and we need some headroom for passing the frame to monitor
1747          * interfaces, but never both at the same time.
1748          */
1749         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1750                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1751
1752         debugfs_hw_add(local);
1753
1754         if (local->hw.conf.beacon_int < 10)
1755                 local->hw.conf.beacon_int = 100;
1756
1757         local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1758                                                   IEEE80211_HW_SIGNAL_DB |
1759                                                   IEEE80211_HW_SIGNAL_DBM) ?
1760                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1761         local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1762                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1763         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1764                 local->wstats_flags |= IW_QUAL_DBM;
1765
1766         result = sta_info_start(local);
1767         if (result < 0)
1768                 goto fail_sta_info;
1769
1770         rtnl_lock();
1771         result = dev_alloc_name(local->mdev, local->mdev->name);
1772         if (result < 0)
1773                 goto fail_dev;
1774
1775         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1776         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1777
1778         result = register_netdevice(local->mdev);
1779         if (result < 0)
1780                 goto fail_dev;
1781
1782         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1783         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1784
1785         result = ieee80211_init_rate_ctrl_alg(local,
1786                                               hw->rate_control_algorithm);
1787         if (result < 0) {
1788                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1789                        "algorithm\n", wiphy_name(local->hw.wiphy));
1790                 goto fail_rate;
1791         }
1792
1793         result = ieee80211_wep_init(local);
1794
1795         if (result < 0) {
1796                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1797                        wiphy_name(local->hw.wiphy));
1798                 goto fail_wep;
1799         }
1800
1801         ieee80211_install_qdisc(local->mdev);
1802
1803         /* add one default STA interface */
1804         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1805                                   IEEE80211_IF_TYPE_STA, NULL);
1806         if (result)
1807                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1808                        wiphy_name(local->hw.wiphy));
1809
1810         local->reg_state = IEEE80211_DEV_REGISTERED;
1811         rtnl_unlock();
1812
1813         ieee80211_led_init(local);
1814
1815         return 0;
1816
1817 fail_wep:
1818         rate_control_deinitialize(local);
1819 fail_rate:
1820         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1821         unregister_netdevice(local->mdev);
1822         local->mdev = NULL;
1823 fail_dev:
1824         rtnl_unlock();
1825         sta_info_stop(local);
1826 fail_sta_info:
1827         debugfs_hw_del(local);
1828         destroy_workqueue(local->hw.workqueue);
1829 fail_workqueue:
1830         if (local->mdev != NULL) {
1831                 ieee80211_if_free(local->mdev);
1832                 local->mdev = NULL;
1833         }
1834 fail_mdev_alloc:
1835         wiphy_unregister(local->hw.wiphy);
1836         return result;
1837 }
1838 EXPORT_SYMBOL(ieee80211_register_hw);
1839
1840 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1841 {
1842         struct ieee80211_local *local = hw_to_local(hw);
1843         struct ieee80211_sub_if_data *sdata, *tmp;
1844
1845         tasklet_kill(&local->tx_pending_tasklet);
1846         tasklet_kill(&local->tasklet);
1847
1848         rtnl_lock();
1849
1850         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1851
1852         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1853
1854         /*
1855          * At this point, interface list manipulations are fine
1856          * because the driver cannot be handing us frames any
1857          * more and the tasklet is killed.
1858          */
1859
1860         /*
1861          * First, we remove all non-master interfaces. Do this because they
1862          * may have bss pointer dependency on the master, and when we free
1863          * the master these would be freed as well, breaking our list
1864          * iteration completely.
1865          */
1866         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1867                 if (sdata->dev == local->mdev)
1868                         continue;
1869                 list_del(&sdata->list);
1870                 __ieee80211_if_del(local, sdata);
1871         }
1872
1873         /* then, finally, remove the master interface */
1874         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1875
1876         rtnl_unlock();
1877
1878         ieee80211_rx_bss_list_deinit(local->mdev);
1879         ieee80211_clear_tx_pending(local);
1880         sta_info_stop(local);
1881         rate_control_deinitialize(local);
1882         debugfs_hw_del(local);
1883
1884         if (skb_queue_len(&local->skb_queue)
1885                         || skb_queue_len(&local->skb_queue_unreliable))
1886                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1887                        wiphy_name(local->hw.wiphy));
1888         skb_queue_purge(&local->skb_queue);
1889         skb_queue_purge(&local->skb_queue_unreliable);
1890
1891         destroy_workqueue(local->hw.workqueue);
1892         wiphy_unregister(local->hw.wiphy);
1893         ieee80211_wep_free(local);
1894         ieee80211_led_exit(local);
1895         ieee80211_if_free(local->mdev);
1896         local->mdev = NULL;
1897 }
1898 EXPORT_SYMBOL(ieee80211_unregister_hw);
1899
1900 void ieee80211_free_hw(struct ieee80211_hw *hw)
1901 {
1902         struct ieee80211_local *local = hw_to_local(hw);
1903
1904         wiphy_free(local->hw.wiphy);
1905 }
1906 EXPORT_SYMBOL(ieee80211_free_hw);
1907
1908 static int __init ieee80211_init(void)
1909 {
1910         struct sk_buff *skb;
1911         int ret;
1912
1913         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1914         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1915                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1916
1917         ret = rc80211_pid_init();
1918         if (ret)
1919                 goto out;
1920
1921         ret = ieee80211_wme_register();
1922         if (ret) {
1923                 printk(KERN_DEBUG "ieee80211_init: failed to "
1924                        "initialize WME (err=%d)\n", ret);
1925                 goto out_cleanup_pid;
1926         }
1927
1928         ieee80211_debugfs_netdev_init();
1929
1930         return 0;
1931
1932  out_cleanup_pid:
1933         rc80211_pid_exit();
1934  out:
1935         return ret;
1936 }
1937
1938 static void __exit ieee80211_exit(void)
1939 {
1940         rc80211_pid_exit();
1941
1942         /*
1943          * For key todo, it'll be empty by now but the work
1944          * might still be scheduled.
1945          */
1946         flush_scheduled_work();
1947
1948         if (mesh_allocated)
1949                 ieee80211s_stop();
1950
1951         ieee80211_wme_unregister();
1952         ieee80211_debugfs_netdev_exit();
1953 }
1954
1955
1956 subsys_initcall(ieee80211_init);
1957 module_exit(ieee80211_exit);
1958
1959 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1960 MODULE_LICENSE("GPL");