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 #define SUPP_MCS_SET_LEN 16
  39
  40 /*
  41  * For seeing transmitted packets on monitor interfaces
  42  * we have a radiotap header too.
  43  */
  44 struct ieee80211_tx_status_rtap_hdr {
  45         struct ieee80211_radiotap_header hdr;
  46         __le16 tx_flags;
  47         u8 data_retries;
  48 } __attribute__ ((packed));
  49
  50 /* common interface routines */
  51
  52 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
  53 {
  54         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  55         return ETH_ALEN;
  56 }
  57
  58 /* must be called under mdev tx lock */
  59 static void ieee80211_configure_filter(struct ieee80211_local *local)
  60 {
  61         unsigned int changed_flags;
  62         unsigned int new_flags = 0;
  63
  64         if (atomic_read(&local->iff_promiscs))
  65                 new_flags |= FIF_PROMISC_IN_BSS;
  66
  67         if (atomic_read(&local->iff_allmultis))
  68                 new_flags |= FIF_ALLMULTI;
  69
  70         if (local->monitors)
  71                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  72
  73         if (local->fif_fcsfail)
  74                 new_flags |= FIF_FCSFAIL;
  75
  76         if (local->fif_plcpfail)
  77                 new_flags |= FIF_PLCPFAIL;
  78
  79         if (local->fif_control)
  80                 new_flags |= FIF_CONTROL;
  81
  82         if (local->fif_other_bss)
  83                 new_flags |= FIF_OTHER_BSS;
  84
  85         changed_flags = local->filter_flags ^ new_flags;
  86
  87         /* be a bit nasty */
  88         new_flags |= (1<<31);
  89
  90         local->ops->configure_filter(local_to_hw(local),
  91                                      changed_flags, &new_flags,
  92                                      local->mdev->mc_count,
  93                                      local->mdev->mc_list);
  94
  95         WARN_ON(new_flags & (1<<31));
  96
  97         local->filter_flags = new_flags & ~(1<<31);
  98 }
  99
 100 /* master interface */
 101
 102 static int ieee80211_master_open(struct net_device *dev)
 103 {
 104         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 105         struct ieee80211_sub_if_data *sdata;
 106         int res = -EOPNOTSUPP;
 107
 108         /* we hold the RTNL here so can safely walk the list */
 109         list_for_each_entry(sdata, &local->interfaces, list) {
 110                 if (sdata->dev != dev && netif_running(sdata->dev)) {
 111                         res = 0;
 112                         break;
 113                 }
 114         }
 115         return res;
 116 }
 117
 118 static int ieee80211_master_stop(struct net_device *dev)
 119 {
 120         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 121         struct ieee80211_sub_if_data *sdata;
 122
 123         /* we hold the RTNL here so can safely walk the list */
 124         list_for_each_entry(sdata, &local->interfaces, list)
 125                 if (sdata->dev != dev && netif_running(sdata->dev))
 126                         dev_close(sdata->dev);
 127
 128         return 0;
 129 }
 130
 131 static void ieee80211_master_set_multicast_list(struct net_device *dev)
 132 {
 133         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 134
 135         ieee80211_configure_filter(local);
 136 }
 137
 138 /* regular interfaces */
 139
 140 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 141 {
 142         int meshhdrlen;
 143         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 144
 145         meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
 146
 147         /* FIX: what would be proper limits for MTU?
 148          * This interface uses 802.3 frames. */
 149         if (new_mtu < 256 ||
 150                 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
 151                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 152                        dev->name, new_mtu);
 153                 return -EINVAL;
 154         }
 155
 156 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 157         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 158 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 159         dev->mtu = new_mtu;
 160         return 0;
 161 }
 162
 163 static inline int identical_mac_addr_allowed(int type1, int type2)
 164 {
 165         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 166                 type2 == IEEE80211_IF_TYPE_MNTR ||
 167                 (type1 == IEEE80211_IF_TYPE_AP &&
 168                  type2 == IEEE80211_IF_TYPE_WDS) ||
 169                 (type1 == IEEE80211_IF_TYPE_WDS &&
 170                  (type2 == IEEE80211_IF_TYPE_WDS ||
 171                   type2 == IEEE80211_IF_TYPE_AP)) ||
 172                 (type1 == IEEE80211_IF_TYPE_AP &&
 173                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 174                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 175                  (type2 == IEEE80211_IF_TYPE_AP ||
 176                   type2 == IEEE80211_IF_TYPE_VLAN)));
 177 }
 178
 179 static int ieee80211_open(struct net_device *dev)
 180 {
 181         struct ieee80211_sub_if_data *sdata, *nsdata;
 182         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 183         struct ieee80211_if_init_conf conf;
 184         int res;
 185         bool need_hw_reconfig = 0;
 186         struct sta_info *sta;
 187
 188         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 189
 190         /* we hold the RTNL here so can safely walk the list */
 191         list_for_each_entry(nsdata, &local->interfaces, list) {
 192                 struct net_device *ndev = nsdata->dev;
 193
 194                 if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
 195                         /*
 196                          * Allow only a single IBSS interface to be up at any
 197                          * time. This is restricted because beacon distribution
 198                          * cannot work properly if both are in the same IBSS.
 199                          *
 200                          * To remove this restriction we'd have to disallow them
 201                          * from setting the same SSID on different IBSS interfaces
 202                          * belonging to the same hardware. Then, however, we're
 203                          * faced with having to adopt two different TSF timers...
 204                          */
 205                         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
 206                             nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
 207                                 return -EBUSY;
 208
 209                         /*
 210                          * Disallow multiple IBSS/STA mode interfaces.
 211                          *
 212                          * This is a technical restriction, it is possible although
 213                          * most likely not IEEE 802.11 compliant to have multiple
 214                          * STAs with just a single hardware (the TSF timer will not
 215                          * be adjusted properly.)
 216                          *
 217                          * However, because mac80211 uses the master device's BSS
 218                          * information for each STA/IBSS interface, doing this will
 219                          * currently corrupt that BSS information completely, unless,
 220                          * a not very useful case, both STAs are associated to the
 221                          * same BSS.
 222                          *
 223                          * To remove this restriction, the BSS information needs to
 224                          * be embedded in the STA/IBSS mode sdata instead of using
 225                          * the master device's BSS structure.
 226                          */
 227                         if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 228                              sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
 229                             (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
 230                              nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
 231                                 return -EBUSY;
 232
 233                         /*
 234                          * The remaining checks are only performed for interfaces
 235                          * with the same MAC address.
 236                          */
 237                         if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
 238                                 continue;
 239
 240                         /*
 241                          * check whether it may have the same address
 242                          */
 243                         if (!identical_mac_addr_allowed(sdata->vif.type,
 244                                                         nsdata->vif.type))
 245                                 return -ENOTUNIQ;
 246
 247                         /*
 248                          * can only add VLANs to enabled APs
 249                          */
 250                         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
 251                             nsdata->vif.type == IEEE80211_IF_TYPE_AP)
 252                                 sdata->u.vlan.ap = nsdata;
 253                 }
 254         }
 255
 256         switch (sdata->vif.type) {
 257         case IEEE80211_IF_TYPE_WDS:
 258                 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
 259                         return -ENOLINK;
 260                 break;
 261         case IEEE80211_IF_TYPE_VLAN:
 262                 if (!sdata->u.vlan.ap)
 263                         return -ENOLINK;
 264                 break;
 265         case IEEE80211_IF_TYPE_AP:
 266         case IEEE80211_IF_TYPE_STA:
 267         case IEEE80211_IF_TYPE_MNTR:
 268         case IEEE80211_IF_TYPE_IBSS:
 269         case IEEE80211_IF_TYPE_MESH_POINT:
 270                 /* no special treatment */
 271                 break;
 272         case IEEE80211_IF_TYPE_INVALID:
 273                 /* cannot happen */
 274                 WARN_ON(1);
 275                 break;
 276         }
 277
 278         if (local->open_count == 0) {
 279                 res = 0;
 280                 if (local->ops->start)
 281                         res = local->ops->start(local_to_hw(local));
 282                 if (res)
 283                         return res;
 284                 need_hw_reconfig = 1;
 285                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 286         }
 287
 288         switch (sdata->vif.type) {
 289         case IEEE80211_IF_TYPE_VLAN:
 290                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
 291                 /* no need to tell driver */
 292                 break;
 293         case IEEE80211_IF_TYPE_MNTR:
 294                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 295                         local->cooked_mntrs++;
 296                         break;
 297                 }
 298
 299                 /* must be before the call to ieee80211_configure_filter */
 300                 local->monitors++;
 301                 if (local->monitors == 1)
 302                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 303
 304                 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
 305                         local->fif_fcsfail++;
 306                 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
 307                         local->fif_plcpfail++;
 308                 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
 309                         local->fif_control++;
 310                 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
 311                         local->fif_other_bss++;
 312
 313                 netif_tx_lock_bh(local->mdev);
 314                 ieee80211_configure_filter(local);
 315                 netif_tx_unlock_bh(local->mdev);
 316                 break;
 317         case IEEE80211_IF_TYPE_STA:
 318         case IEEE80211_IF_TYPE_IBSS:
 319                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 320                 /* fall through */
 321         default:
 322                 conf.vif = &sdata->vif;
 323                 conf.type = sdata->vif.type;
 324                 conf.mac_addr = dev->dev_addr;
 325                 res = local->ops->add_interface(local_to_hw(local), &conf);
 326                 if (res)
 327                         goto err_stop;
 328
 329                 ieee80211_if_config(dev);
 330                 ieee80211_reset_erp_info(dev);
 331                 ieee80211_enable_keys(sdata);
 332
 333                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
 334                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
 335                         netif_carrier_off(dev);
 336                 else
 337                         netif_carrier_on(dev);
 338         }
 339
 340         if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
 341                 /* Create STA entry for the WDS peer */
 342                 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
 343                                      GFP_KERNEL);
 344                 if (!sta) {
 345                         res = -ENOMEM;
 346                         goto err_del_interface;
 347                 }
 348
 349                 sta->flags |= WLAN_STA_AUTHORIZED;
 350
 351                 res = sta_info_insert(sta);
 352                 if (res) {
 353                         /* STA has been freed */
 354                         goto err_del_interface;
 355                 }
 356         }
 357
 358         if (local->open_count == 0) {
 359                 res = dev_open(local->mdev);
 360                 WARN_ON(res);
 361                 if (res)
 362                         goto err_del_interface;
 363                 tasklet_enable(&local->tx_pending_tasklet);
 364                 tasklet_enable(&local->tasklet);
 365         }
 366
 367         /*
 368          * set_multicast_list will be invoked by the networking core
 369          * which will check whether any increments here were done in
 370          * error and sync them down to the hardware as filter flags.
 371          */
 372         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 373                 atomic_inc(&local->iff_allmultis);
 374
 375         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 376                 atomic_inc(&local->iff_promiscs);
 377
 378         local->open_count++;
 379         if (need_hw_reconfig)
 380                 ieee80211_hw_config(local);
 381
 382         /*
 383          * ieee80211_sta_work is disabled while network interface
 384          * is down. Therefore, some configuration changes may not
 385          * yet be effective. Trigger execution of ieee80211_sta_work
 386          * to fix this.
 387          */
 388         if(sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 389            sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 390                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 391                 queue_work(local->hw.workqueue, &ifsta->work);
 392         }
 393
 394         netif_start_queue(dev);
 395
 396         return 0;
 397  err_del_interface:
 398         local->ops->remove_interface(local_to_hw(local), &conf);
 399  err_stop:
 400         if (!local->open_count && local->ops->stop)
 401                 local->ops->stop(local_to_hw(local));
 402         return res;
 403 }
 404
 405 static int ieee80211_stop(struct net_device *dev)
 406 {
 407         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 408         struct ieee80211_local *local = sdata->local;
 409         struct ieee80211_if_init_conf conf;
 410         struct sta_info *sta;
 411
 412         /*
 413          * Stop TX on this interface first.
 414          */
 415         netif_stop_queue(dev);
 416
 417         /*
 418          * Now delete all active aggregation sessions.
 419          */
 420         rcu_read_lock();
 421
 422         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 423                 if (sta->sdata == sdata)
 424                         ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
 425         }
 426
 427         rcu_read_unlock();
 428
 429         /*
 430          * Remove all stations associated with this interface.
 431          *
 432          * This must be done before calling ops->remove_interface()
 433          * because otherwise we can later invoke ops->sta_notify()
 434          * whenever the STAs are removed, and that invalidates driver
 435          * assumptions about always getting a vif pointer that is valid
 436          * (because if we remove a STA after ops->remove_interface()
 437          * the driver will have removed the vif info already!)
 438          *
 439          * We could relax this and only unlink the stations from the
 440          * hash table and list but keep them on a per-sdata list that
 441          * will be inserted back again when the interface is brought
 442          * up again, but I don't currently see a use case for that,
 443          * except with WDS which gets a STA entry created when it is
 444          * brought up.
 445          */
 446         sta_info_flush(local, sdata);
 447
 448         /*
 449          * Don't count this interface for promisc/allmulti while it
 450          * is down. dev_mc_unsync() will invoke set_multicast_list
 451          * on the master interface which will sync these down to the
 452          * hardware as filter flags.
 453          */
 454         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 455                 atomic_dec(&local->iff_allmultis);
 456
 457         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 458                 atomic_dec(&local->iff_promiscs);
 459
 460         dev_mc_unsync(local->mdev, dev);
 461
 462         /* APs need special treatment */
 463         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 464                 struct ieee80211_sub_if_data *vlan, *tmp;
 465                 struct beacon_data *old_beacon = sdata->u.ap.beacon;
 466
 467                 /* remove beacon */
 468                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 469                 synchronize_rcu();
 470                 kfree(old_beacon);
 471
 472                 /* down all dependent devices, that is VLANs */
 473                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 474                                          u.vlan.list)
 475                         dev_close(vlan->dev);
 476                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 477         }
 478
 479         local->open_count--;
 480
 481         switch (sdata->vif.type) {
 482         case IEEE80211_IF_TYPE_VLAN:
 483                 list_del(&sdata->u.vlan.list);
 484                 sdata->u.vlan.ap = NULL;
 485                 /* no need to tell driver */
 486                 break;
 487         case IEEE80211_IF_TYPE_MNTR:
 488                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 489                         local->cooked_mntrs--;
 490                         break;
 491                 }
 492
 493                 local->monitors--;
 494                 if (local->monitors == 0)
 495                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 496
 497                 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
 498                         local->fif_fcsfail--;
 499                 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
 500                         local->fif_plcpfail--;
 501                 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
 502                         local->fif_control--;
 503                 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
 504                         local->fif_other_bss--;
 505
 506                 netif_tx_lock_bh(local->mdev);
 507                 ieee80211_configure_filter(local);
 508                 netif_tx_unlock_bh(local->mdev);
 509                 break;
 510         case IEEE80211_IF_TYPE_MESH_POINT:
 511         case IEEE80211_IF_TYPE_STA:
 512         case IEEE80211_IF_TYPE_IBSS:
 513                 sdata->u.sta.state = IEEE80211_DISABLED;
 514                 del_timer_sync(&sdata->u.sta.timer);
 515                 /*
 516                  * When we get here, the interface is marked down.
 517                  * Call synchronize_rcu() to wait for the RX path
 518                  * should it be using the interface and enqueuing
 519                  * frames at this very time on another CPU.
 520                  */
 521                 synchronize_rcu();
 522                 skb_queue_purge(&sdata->u.sta.skb_queue);
 523
 524                 if (local->scan_dev == sdata->dev) {
 525                         if (!local->ops->hw_scan) {
 526                                 local->sta_sw_scanning = 0;
 527                                 cancel_delayed_work(&local->scan_work);
 528                         } else
 529                                 local->sta_hw_scanning = 0;
 530                 }
 531
 532                 flush_workqueue(local->hw.workqueue);
 533
 534                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 535                 kfree(sdata->u.sta.extra_ie);
 536                 sdata->u.sta.extra_ie = NULL;
 537                 sdata->u.sta.extra_ie_len = 0;
 538                 /* fall through */
 539         default:
 540                 conf.vif = &sdata->vif;
 541                 conf.type = sdata->vif.type;
 542                 conf.mac_addr = dev->dev_addr;
 543                 /* disable all keys for as long as this netdev is down */
 544                 ieee80211_disable_keys(sdata);
 545                 local->ops->remove_interface(local_to_hw(local), &conf);
 546         }
 547
 548         if (local->open_count == 0) {
 549                 if (netif_running(local->mdev))
 550                         dev_close(local->mdev);
 551
 552                 if (local->ops->stop)
 553                         local->ops->stop(local_to_hw(local));
 554
 555                 ieee80211_led_radio(local, 0);
 556
 557                 tasklet_disable(&local->tx_pending_tasklet);
 558                 tasklet_disable(&local->tasklet);
 559         }
 560
 561         return 0;
 562 }
 563
 564 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 565 {
 566         struct ieee80211_local *local = hw_to_local(hw);
 567         struct sta_info *sta;
 568         struct ieee80211_sub_if_data *sdata;
 569         u16 start_seq_num = 0;
 570         u8 *state;
 571         int ret;
 572         DECLARE_MAC_BUF(mac);
 573
 574         if (tid >= STA_TID_NUM)
 575                 return -EINVAL;
 576
 577 #ifdef CONFIG_MAC80211_HT_DEBUG
 578         printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
 579                                 print_mac(mac, ra), tid);
 580 #endif /* CONFIG_MAC80211_HT_DEBUG */
 581
 582         rcu_read_lock();
 583
 584         sta = sta_info_get(local, ra);
 585         if (!sta) {
 586                 printk(KERN_DEBUG "Could not find the station\n");
 587                 rcu_read_unlock();
 588                 return -ENOENT;
 589         }
 590
 591         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
 592
 593         /* we have tried too many times, receiver does not want A-MPDU */
 594         if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
 595                 ret = -EBUSY;
 596                 goto start_ba_exit;
 597         }
 598
 599         state = &sta->ampdu_mlme.tid_state_tx[tid];
 600         /* check if the TID is not in aggregation flow already */
 601         if (*state != HT_AGG_STATE_IDLE) {
 602 #ifdef CONFIG_MAC80211_HT_DEBUG
 603                 printk(KERN_DEBUG "BA request denied - session is not "
 604                                  "idle on tid %u\n", tid);
 605 #endif /* CONFIG_MAC80211_HT_DEBUG */
 606                 ret = -EAGAIN;
 607                 goto start_ba_exit;
 608         }
 609
 610         /* prepare A-MPDU MLME for Tx aggregation */
 611         sta->ampdu_mlme.tid_tx[tid] =
 612                         kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
 613         if (!sta->ampdu_mlme.tid_tx[tid]) {
 614                 if (net_ratelimit())
 615                         printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
 616                                         tid);
 617                 ret = -ENOMEM;
 618                 goto start_ba_exit;
 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         /* ensure that TX flow won't interrupt us
 628          * until the end of the call to requeue function */
 629         spin_lock_bh(&local->mdev->queue_lock);
 630
 631         /* create a new queue for this aggregation */
 632         ret = ieee80211_ht_agg_queue_add(local, sta, tid);
 633
 634         /* case no queue is available to aggregation
 635          * don't switch to aggregation */
 636         if (ret) {
 637 #ifdef CONFIG_MAC80211_HT_DEBUG
 638                 printk(KERN_DEBUG "BA request denied - queue unavailable for"
 639                                         " tid %d\n", tid);
 640 #endif /* CONFIG_MAC80211_HT_DEBUG */
 641                 goto start_ba_err;
 642         }
 643         sdata = sta->sdata;
 644
 645         /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
 646          * call back right away, it must see that the flow has begun */
 647         *state |= HT_ADDBA_REQUESTED_MSK;
 648
 649         if (local->ops->ampdu_action)
 650                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
 651                                                 ra, tid, &start_seq_num);
 652
 653         if (ret) {
 654                 /* No need to requeue the packets in the agg queue, since we
 655                  * held the tx lock: no packet could be enqueued to the newly
 656                  * allocated queue */
 657                  ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
 658 #ifdef CONFIG_MAC80211_HT_DEBUG
 659                 printk(KERN_DEBUG "BA request denied - HW unavailable for"
 660                                         " tid %d\n", tid);
 661 #endif /* CONFIG_MAC80211_HT_DEBUG */
 662                 *state = HT_AGG_STATE_IDLE;
 663                 goto start_ba_err;
 664         }
 665
 666         /* Will put all the packets in the new SW queue */
 667         ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
 668         spin_unlock_bh(&local->mdev->queue_lock);
 669
 670         /* send an addBA request */
 671         sta->ampdu_mlme.dialog_token_allocator++;
 672         sta->ampdu_mlme.tid_tx[tid]->dialog_token =
 673                         sta->ampdu_mlme.dialog_token_allocator;
 674         sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
 675
 676         ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
 677                          sta->ampdu_mlme.tid_tx[tid]->dialog_token,
 678                          sta->ampdu_mlme.tid_tx[tid]->ssn,
 679                          0x40, 5000);
 680
 681         /* activate the timer for the recipient's addBA response */
 682         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
 683                                 jiffies + ADDBA_RESP_INTERVAL;
 684         add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
 685         printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
 686         goto start_ba_exit;
 687
 688 start_ba_err:
 689         kfree(sta->ampdu_mlme.tid_tx[tid]);
 690         sta->ampdu_mlme.tid_tx[tid] = NULL;
 691         spin_unlock_bh(&local->mdev->queue_lock);
 692         ret = -EBUSY;
 693 start_ba_exit:
 694         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 695         rcu_read_unlock();
 696         return ret;
 697 }
 698 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
 699
 700 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
 701                                  u8 *ra, u16 tid,
 702                                  enum ieee80211_back_parties initiator)
 703 {
 704         struct ieee80211_local *local = hw_to_local(hw);
 705         struct sta_info *sta;
 706         u8 *state;
 707         int ret = 0;
 708         DECLARE_MAC_BUF(mac);
 709
 710         if (tid >= STA_TID_NUM)
 711                 return -EINVAL;
 712
 713         rcu_read_lock();
 714         sta = sta_info_get(local, ra);
 715         if (!sta) {
 716                 rcu_read_unlock();
 717                 return -ENOENT;
 718         }
 719
 720         /* check if the TID is in aggregation */
 721         state = &sta->ampdu_mlme.tid_state_tx[tid];
 722         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
 723
 724         if (*state != HT_AGG_STATE_OPERATIONAL) {
 725                 ret = -ENOENT;
 726                 goto stop_BA_exit;
 727         }
 728
 729 #ifdef CONFIG_MAC80211_HT_DEBUG
 730         printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
 731                                 print_mac(mac, ra), tid);
 732 #endif /* CONFIG_MAC80211_HT_DEBUG */
 733
 734         ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
 735
 736         *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
 737                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
 738
 739         if (local->ops->ampdu_action)
 740                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
 741                                                 ra, tid, NULL);
 742
 743         /* case HW denied going back to legacy */
 744         if (ret) {
 745                 WARN_ON(ret != -EBUSY);
 746                 *state = HT_AGG_STATE_OPERATIONAL;
 747                 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 748                 goto stop_BA_exit;
 749         }
 750
 751 stop_BA_exit:
 752         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 753         rcu_read_unlock();
 754         return ret;
 755 }
 756 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
 757
 758 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 759 {
 760         struct ieee80211_local *local = hw_to_local(hw);
 761         struct sta_info *sta;
 762         u8 *state;
 763         DECLARE_MAC_BUF(mac);
 764
 765         if (tid >= STA_TID_NUM) {
 766                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
 767                                 tid, STA_TID_NUM);
 768                 return;
 769         }
 770
 771         rcu_read_lock();
 772         sta = sta_info_get(local, ra);
 773         if (!sta) {
 774                 rcu_read_unlock();
 775                 printk(KERN_DEBUG "Could not find station: %s\n",
 776                                 print_mac(mac, ra));
 777                 return;
 778         }
 779
 780         state = &sta->ampdu_mlme.tid_state_tx[tid];
 781         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
 782
 783         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
 784                 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
 785                                 *state);
 786                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 787                 rcu_read_unlock();
 788                 return;
 789         }
 790
 791         WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
 792
 793         *state |= HT_ADDBA_DRV_READY_MSK;
 794
 795         if (*state == HT_AGG_STATE_OPERATIONAL) {
 796                 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
 797                 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 798         }
 799         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 800         rcu_read_unlock();
 801 }
 802 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
 803
 804 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
 805 {
 806         struct ieee80211_local *local = hw_to_local(hw);
 807         struct sta_info *sta;
 808         u8 *state;
 809         int agg_queue;
 810         DECLARE_MAC_BUF(mac);
 811
 812         if (tid >= STA_TID_NUM) {
 813                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
 814                                 tid, STA_TID_NUM);
 815                 return;
 816         }
 817
 818 #ifdef CONFIG_MAC80211_HT_DEBUG
 819         printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
 820                                 print_mac(mac, ra), tid);
 821 #endif /* CONFIG_MAC80211_HT_DEBUG */
 822
 823         rcu_read_lock();
 824         sta = sta_info_get(local, ra);
 825         if (!sta) {
 826                 printk(KERN_DEBUG "Could not find station: %s\n",
 827                                 print_mac(mac, ra));
 828                 rcu_read_unlock();
 829                 return;
 830         }
 831         state = &sta->ampdu_mlme.tid_state_tx[tid];
 832
 833         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
 834         if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
 835                 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
 836                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 837                 rcu_read_unlock();
 838                 return;
 839         }
 840
 841         if (*state & HT_AGG_STATE_INITIATOR_MSK)
 842                 ieee80211_send_delba(sta->sdata->dev, ra, tid,
 843                         WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
 844
 845         agg_queue = sta->tid_to_tx_q[tid];
 846
 847         /* avoid ordering issues: we are the only one that can modify
 848          * the content of the qdiscs */
 849         spin_lock_bh(&local->mdev->queue_lock);
 850         /* remove the queue for this aggregation */
 851         ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
 852         spin_unlock_bh(&local->mdev->queue_lock);
 853
 854         /* we just requeued the all the frames that were in the removed
 855          * queue, and since we might miss a softirq we do netif_schedule.
 856          * ieee80211_wake_queue is not used here as this queue is not
 857          * necessarily stopped */
 858         netif_schedule(local->mdev);
 859         *state = HT_AGG_STATE_IDLE;
 860         sta->ampdu_mlme.addba_req_num[tid] = 0;
 861         kfree(sta->ampdu_mlme.tid_tx[tid]);
 862         sta->ampdu_mlme.tid_tx[tid] = NULL;
 863         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 864
 865         rcu_read_unlock();
 866 }
 867 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
 868
 869 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
 870                                       const u8 *ra, u16 tid)
 871 {
 872         struct ieee80211_local *local = hw_to_local(hw);
 873         struct ieee80211_ra_tid *ra_tid;
 874         struct sk_buff *skb = dev_alloc_skb(0);
 875
 876         if (unlikely(!skb)) {
 877                 if (net_ratelimit())
 878                         printk(KERN_WARNING "%s: Not enough memory, "
 879                                "dropping start BA session", skb->dev->name);
 880                 return;
 881         }
 882         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 883         memcpy(&ra_tid->ra, ra, ETH_ALEN);
 884         ra_tid->tid = tid;
 885
 886         skb->pkt_type = IEEE80211_ADDBA_MSG;
 887         skb_queue_tail(&local->skb_queue, skb);
 888         tasklet_schedule(&local->tasklet);
 889 }
 890 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
 891
 892 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
 893                                      const u8 *ra, u16 tid)
 894 {
 895         struct ieee80211_local *local = hw_to_local(hw);
 896         struct ieee80211_ra_tid *ra_tid;
 897         struct sk_buff *skb = dev_alloc_skb(0);
 898
 899         if (unlikely(!skb)) {
 900                 if (net_ratelimit())
 901                         printk(KERN_WARNING "%s: Not enough memory, "
 902                                "dropping stop BA session", skb->dev->name);
 903                 return;
 904         }
 905         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 906         memcpy(&ra_tid->ra, ra, ETH_ALEN);
 907         ra_tid->tid = tid;
 908
 909         skb->pkt_type = IEEE80211_DELBA_MSG;
 910         skb_queue_tail(&local->skb_queue, skb);
 911         tasklet_schedule(&local->tasklet);
 912 }
 913 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
 914
 915 static void ieee80211_set_multicast_list(struct net_device *dev)
 916 {
 917         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 918         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 919         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 920
 921         allmulti = !!(dev->flags & IFF_ALLMULTI);
 922         promisc = !!(dev->flags & IFF_PROMISC);
 923         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 924         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 925
 926         if (allmulti != sdata_allmulti) {
 927                 if (dev->flags & IFF_ALLMULTI)
 928                         atomic_inc(&local->iff_allmultis);
 929                 else
 930                         atomic_dec(&local->iff_allmultis);
 931                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 932         }
 933
 934         if (promisc != sdata_promisc) {
 935                 if (dev->flags & IFF_PROMISC)
 936                         atomic_inc(&local->iff_promiscs);
 937                 else
 938                         atomic_dec(&local->iff_promiscs);
 939                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 940         }
 941
 942         dev_mc_sync(local->mdev, dev);
 943 }
 944
 945 static const struct header_ops ieee80211_header_ops = {
 946         .create         = eth_header,
 947         .parse          = header_parse_80211,
 948         .rebuild        = eth_rebuild_header,
 949         .cache          = eth_header_cache,
 950         .cache_update   = eth_header_cache_update,
 951 };
 952
 953 /* Must not be called for mdev */
 954 void ieee80211_if_setup(struct net_device *dev)
 955 {
 956         ether_setup(dev);
 957         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 958         dev->wireless_handlers = &ieee80211_iw_handler_def;
 959         dev->set_multicast_list = ieee80211_set_multicast_list;
 960         dev->change_mtu = ieee80211_change_mtu;
 961         dev->open = ieee80211_open;
 962         dev->stop = ieee80211_stop;
 963         dev->destructor = ieee80211_if_free;
 964 }
 965
 966 /* everything else */
 967
 968 static int __ieee80211_if_config(struct net_device *dev,
 969                                  struct sk_buff *beacon,
 970                                  struct ieee80211_tx_control *control)
 971 {
 972         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 973         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 974         struct ieee80211_if_conf conf;
 975
 976         if (!local->ops->config_interface || !netif_running(dev))
 977                 return 0;
 978
 979         memset(&conf, 0, sizeof(conf));
 980         conf.type = sdata->vif.type;
 981         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 982             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 983                 conf.bssid = sdata->u.sta.bssid;
 984                 conf.ssid = sdata->u.sta.ssid;
 985                 conf.ssid_len = sdata->u.sta.ssid_len;
 986         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
 987                 conf.beacon = beacon;
 988                 conf.beacon_control = control;
 989                 ieee80211_start_mesh(dev);
 990         } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 991                 conf.ssid = sdata->u.ap.ssid;
 992                 conf.ssid_len = sdata->u.ap.ssid_len;
 993                 conf.beacon = beacon;
 994                 conf.beacon_control = control;
 995         }
 996         return local->ops->config_interface(local_to_hw(local),
 997                                             &sdata->vif, &conf);
 998 }
 999
1000 int ieee80211_if_config(struct net_device *dev)
1001 {
1002         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1003         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1004         if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
1005             (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1006                 return ieee80211_if_config_beacon(dev);
1007         return __ieee80211_if_config(dev, NULL, NULL);
1008 }
1009
1010 int ieee80211_if_config_beacon(struct net_device *dev)
1011 {
1012         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1013         struct ieee80211_tx_control control;
1014         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1015         struct sk_buff *skb;
1016
1017         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1018                 return 0;
1019         skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
1020                                    &control);
1021         if (!skb)
1022                 return -ENOMEM;
1023         return __ieee80211_if_config(dev, skb, &control);
1024 }
1025
1026 int ieee80211_hw_config(struct ieee80211_local *local)
1027 {
1028         struct ieee80211_channel *chan;
1029         int ret = 0;
1030
1031         if (local->sta_sw_scanning)
1032                 chan = local->scan_channel;
1033         else
1034                 chan = local->oper_channel;
1035
1036         local->hw.conf.channel = chan;
1037
1038         if (!local->hw.conf.power_level)
1039                 local->hw.conf.power_level = chan->max_power;
1040         else
1041                 local->hw.conf.power_level = min(chan->max_power,
1042                                                local->hw.conf.power_level);
1043
1044         local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1045
1046 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1047         printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1048                wiphy_name(local->hw.wiphy), chan->center_freq);
1049 #endif
1050
1051         if (local->open_count)
1052                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1053
1054         return ret;
1055 }
1056
1057 /**
1058  * ieee80211_handle_ht should be used only after legacy configuration
1059  * has been determined namely band, as ht configuration depends upon
1060  * the hardware's HT abilities for a _specific_ band.
1061  */
1062 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1063                            struct ieee80211_ht_info *req_ht_cap,
1064                            struct ieee80211_ht_bss_info *req_bss_cap)
1065 {
1066         struct ieee80211_conf *conf = &local->hw.conf;
1067         struct ieee80211_supported_band *sband;
1068         struct ieee80211_ht_info ht_conf;
1069         struct ieee80211_ht_bss_info ht_bss_conf;
1070         int i;
1071         u32 changed = 0;
1072
1073         sband = local->hw.wiphy->bands[conf->channel->band];
1074
1075         /* HT is not supported */
1076         if (!sband->ht_info.ht_supported) {
1077                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1078                 return 0;
1079         }
1080
1081         memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1082         memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1083
1084         if (enable_ht) {
1085                 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1086                         changed |= BSS_CHANGED_HT;
1087
1088                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1089                 ht_conf.ht_supported = 1;
1090
1091                 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1092                 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1093                 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1094
1095                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
1096                         ht_conf.supp_mcs_set[i] =
1097                                         sband->ht_info.supp_mcs_set[i] &
1098                                         req_ht_cap->supp_mcs_set[i];
1099
1100                 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1101                 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1102                 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1103
1104                 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1105                 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1106
1107                 /* if bss configuration changed store the new one */
1108                 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1109                     memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1110                         changed |= BSS_CHANGED_HT;
1111                         memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1112                         memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1113                 }
1114         } else {
1115                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1116                         changed |= BSS_CHANGED_HT;
1117                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1118         }
1119
1120         return changed;
1121 }
1122
1123 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1124                                       u32 changed)
1125 {
1126         struct ieee80211_local *local = sdata->local;
1127
1128         if (!changed)
1129                 return;
1130
1131         if (local->ops->bss_info_changed)
1132                 local->ops->bss_info_changed(local_to_hw(local),
1133                                              &sdata->vif,
1134                                              &sdata->bss_conf,
1135                                              changed);
1136 }
1137
1138 void ieee80211_reset_erp_info(struct net_device *dev)
1139 {
1140         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1141
1142         sdata->bss_conf.use_cts_prot = 0;
1143         sdata->bss_conf.use_short_preamble = 0;
1144         ieee80211_bss_info_change_notify(sdata,
1145                                          BSS_CHANGED_ERP_CTS_PROT |
1146                                          BSS_CHANGED_ERP_PREAMBLE);
1147 }
1148
1149 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1150                                  struct sk_buff *skb,
1151                                  struct ieee80211_tx_status *status)
1152 {
1153         struct ieee80211_local *local = hw_to_local(hw);
1154         struct ieee80211_tx_status *saved;
1155         int tmp;
1156
1157         skb->dev = local->mdev;
1158         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
1159         if (unlikely(!saved)) {
1160                 if (net_ratelimit())
1161                         printk(KERN_WARNING "%s: Not enough memory, "
1162                                "dropping tx status", skb->dev->name);
1163                 /* should be dev_kfree_skb_irq, but due to this function being
1164                  * named _irqsafe instead of just _irq we can't be sure that
1165                  * people won't call it from non-irq contexts */
1166                 dev_kfree_skb_any(skb);
1167                 return;
1168         }
1169         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
1170         /* copy pointer to saved status into skb->cb for use by tasklet */
1171         memcpy(skb->cb, &saved, sizeof(saved));
1172
1173         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1174         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
1175                        &local->skb_queue : &local->skb_queue_unreliable, skb);
1176         tmp = skb_queue_len(&local->skb_queue) +
1177                 skb_queue_len(&local->skb_queue_unreliable);
1178         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1179                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1180                 memcpy(&saved, skb->cb, sizeof(saved));
1181                 kfree(saved);
1182                 dev_kfree_skb_irq(skb);
1183                 tmp--;
1184                 I802_DEBUG_INC(local->tx_status_drop);
1185         }
1186         tasklet_schedule(&local->tasklet);
1187 }
1188 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1189
1190 static void ieee80211_tasklet_handler(unsigned long data)
1191 {
1192         struct ieee80211_local *local = (struct ieee80211_local *) data;
1193         struct sk_buff *skb;
1194         struct ieee80211_rx_status rx_status;
1195         struct ieee80211_tx_status *tx_status;
1196         struct ieee80211_ra_tid *ra_tid;
1197
1198         while ((skb = skb_dequeue(&local->skb_queue)) ||
1199                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1200                 switch (skb->pkt_type) {
1201                 case IEEE80211_RX_MSG:
1202                         /* status is in skb->cb */
1203                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
1204                         /* Clear skb->pkt_type in order to not confuse kernel
1205                          * netstack. */
1206                         skb->pkt_type = 0;
1207                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1208                         break;
1209                 case IEEE80211_TX_STATUS_MSG:
1210                         /* get pointer to saved status out of skb->cb */
1211                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
1212                         skb->pkt_type = 0;
1213                         ieee80211_tx_status(local_to_hw(local),
1214                                             skb, tx_status);
1215                         kfree(tx_status);
1216                         break;
1217                 case IEEE80211_DELBA_MSG:
1218                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1219                         ieee80211_stop_tx_ba_cb(local_to_hw(local),
1220                                                 ra_tid->ra, ra_tid->tid);
1221                         dev_kfree_skb(skb);
1222                         break;
1223                 case IEEE80211_ADDBA_MSG:
1224                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1225                         ieee80211_start_tx_ba_cb(local_to_hw(local),
1226                                                  ra_tid->ra, ra_tid->tid);
1227                         dev_kfree_skb(skb);
1228                         break ;
1229                 default: /* should never get here! */
1230                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
1231                                wiphy_name(local->hw.wiphy), skb->pkt_type);
1232                         dev_kfree_skb(skb);
1233                         break;
1234                 }
1235         }
1236 }
1237
1238 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1239  * make a prepared TX frame (one that has been given to hw) to look like brand
1240  * new IEEE 802.11 frame that is ready to go through TX processing again.
1241  * Also, tx_packet_data in cb is restored from tx_control. */
1242 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1243                                       struct ieee80211_key *key,
1244                                       struct sk_buff *skb,
1245                                       struct ieee80211_tx_control *control)
1246 {
1247         int hdrlen, iv_len, mic_len;
1248         struct ieee80211_tx_packet_data *pkt_data;
1249
1250         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1251         pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
1252         pkt_data->flags = 0;
1253         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
1254                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
1255         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
1256                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
1257         if (control->flags & IEEE80211_TXCTL_REQUEUE)
1258                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
1259         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
1260                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
1261         pkt_data->queue = control->queue;
1262
1263         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1264
1265         if (!key)
1266                 goto no_key;
1267
1268         switch (key->conf.alg) {
1269         case ALG_WEP:
1270                 iv_len = WEP_IV_LEN;
1271                 mic_len = WEP_ICV_LEN;
1272                 break;
1273         case ALG_TKIP:
1274                 iv_len = TKIP_IV_LEN;
1275                 mic_len = TKIP_ICV_LEN;
1276                 break;
1277         case ALG_CCMP:
1278                 iv_len = CCMP_HDR_LEN;
1279                 mic_len = CCMP_MIC_LEN;
1280                 break;
1281         default:
1282                 goto no_key;
1283         }
1284
1285         if (skb->len >= mic_len &&
1286             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1287                 skb_trim(skb, skb->len - mic_len);
1288         if (skb->len >= iv_len && skb->len > hdrlen) {
1289                 memmove(skb->data + iv_len, skb->data, hdrlen);
1290                 skb_pull(skb, iv_len);
1291         }
1292
1293 no_key:
1294         {
1295                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1296                 u16 fc = le16_to_cpu(hdr->frame_control);
1297                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1298                         fc &= ~IEEE80211_STYPE_QOS_DATA;
1299                         hdr->frame_control = cpu_to_le16(fc);
1300                         memmove(skb->data + 2, skb->data, hdrlen - 2);
1301                         skb_pull(skb, 2);
1302                 }
1303         }
1304 }
1305
1306 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1307                                             struct sta_info *sta,
1308                                             struct sk_buff *skb,
1309                                             struct ieee80211_tx_status *status)
1310 {
1311         sta->tx_filtered_count++;
1312
1313         /*
1314          * Clear the TX filter mask for this STA when sending the next
1315          * packet. If the STA went to power save mode, this will happen
1316          * happen when it wakes up for the next time.
1317          */
1318         sta->flags |= WLAN_STA_CLEAR_PS_FILT;
1319
1320         /*
1321          * This code races in the following way:
1322          *
1323          *  (1) STA sends frame indicating it will go to sleep and does so
1324          *  (2) hardware/firmware adds STA to filter list, passes frame up
1325          *  (3) hardware/firmware processes TX fifo and suppresses a frame
1326          *  (4) we get TX status before having processed the frame and
1327          *      knowing that the STA has gone to sleep.
1328          *
1329          * This is actually quite unlikely even when both those events are
1330          * processed from interrupts coming in quickly after one another or
1331          * even at the same time because we queue both TX status events and
1332          * RX frames to be processed by a tasklet and process them in the
1333          * same order that they were received or TX status last. Hence, there
1334          * is no race as long as the frame RX is processed before the next TX
1335          * status, which drivers can ensure, see below.
1336          *
1337          * Note that this can only happen if the hardware or firmware can
1338          * actually add STAs to the filter list, if this is done by the
1339          * driver in response to set_tim() (which will only reduce the race
1340          * this whole filtering tries to solve, not completely solve it)
1341          * this situation cannot happen.
1342          *
1343          * To completely solve this race drivers need to make sure that they
1344          *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1345          *      functions and
1346          *  (b) always process RX events before TX status events if ordering
1347          *      can be unknown, for example with different interrupt status
1348          *      bits.
1349          */
1350         if (sta->flags & WLAN_STA_PS &&
1351             skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1352                 ieee80211_remove_tx_extra(local, sta->key, skb,
1353                                           &status->control);
1354                 skb_queue_tail(&sta->tx_filtered, skb);
1355                 return;
1356         }
1357
1358         if (!(sta->flags & WLAN_STA_PS) &&
1359             !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1360                 /* Software retry the packet once */
1361                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1362                 ieee80211_remove_tx_extra(local, sta->key, skb,
1363                                           &status->control);
1364                 dev_queue_xmit(skb);
1365                 return;
1366         }
1367
1368         if (net_ratelimit())
1369                 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1370                        "queue_len=%d PS=%d @%lu\n",
1371                        wiphy_name(local->hw.wiphy),
1372                        skb_queue_len(&sta->tx_filtered),
1373                        !!(sta->flags & WLAN_STA_PS), jiffies);
1374         dev_kfree_skb(skb);
1375 }
1376
1377 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
1378                          struct ieee80211_tx_status *status)
1379 {
1380         struct sk_buff *skb2;
1381         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1382         struct ieee80211_local *local = hw_to_local(hw);
1383         u16 frag, type;
1384         struct ieee80211_tx_status_rtap_hdr *rthdr;
1385         struct ieee80211_sub_if_data *sdata;
1386         struct net_device *prev_dev = NULL;
1387
1388         if (!status) {
1389                 printk(KERN_ERR
1390                        "%s: ieee80211_tx_status called with NULL status\n",
1391                        wiphy_name(local->hw.wiphy));
1392                 dev_kfree_skb(skb);
1393                 return;
1394         }
1395
1396         rcu_read_lock();
1397
1398         if (status->excessive_retries) {
1399                 struct sta_info *sta;
1400                 sta = sta_info_get(local, hdr->addr1);
1401                 if (sta) {
1402                         if (sta->flags & WLAN_STA_PS) {
1403                                 /*
1404                                  * The STA is in power save mode, so assume
1405                                  * that this TX packet failed because of that.
1406                                  */
1407                                 status->excessive_retries = 0;
1408                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
1409                                 ieee80211_handle_filtered_frame(local, sta,
1410                                                                 skb, status);
1411                                 rcu_read_unlock();
1412                                 return;
1413                         }
1414                 }
1415         }
1416
1417         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1418                 struct sta_info *sta;
1419                 sta = sta_info_get(local, hdr->addr1);
1420                 if (sta) {
1421                         ieee80211_handle_filtered_frame(local, sta, skb,
1422                                                         status);
1423                         rcu_read_unlock();
1424                         return;
1425                 }
1426         } else
1427                 rate_control_tx_status(local->mdev, skb, status);
1428
1429         rcu_read_unlock();
1430
1431         ieee80211_led_tx(local, 0);
1432
1433         /* SNMP counters
1434          * Fragments are passed to low-level drivers as separate skbs, so these
1435          * are actually fragments, not frames. Update frame counters only for
1436          * the first fragment of the frame. */
1437
1438         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1439         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1440
1441         if (status->flags & IEEE80211_TX_STATUS_ACK) {
1442                 if (frag == 0) {
1443                         local->dot11TransmittedFrameCount++;
1444                         if (is_multicast_ether_addr(hdr->addr1))
1445                                 local->dot11MulticastTransmittedFrameCount++;
1446                         if (status->retry_count > 0)
1447                                 local->dot11RetryCount++;
1448                         if (status->retry_count > 1)
1449                                 local->dot11MultipleRetryCount++;
1450                 }
1451
1452                 /* This counter shall be incremented for an acknowledged MPDU
1453                  * with an individual address in the address 1 field or an MPDU
1454                  * with a multicast address in the address 1 field of type Data
1455                  * or Management. */
1456                 if (!is_multicast_ether_addr(hdr->addr1) ||
1457                     type == IEEE80211_FTYPE_DATA ||
1458                     type == IEEE80211_FTYPE_MGMT)
1459                         local->dot11TransmittedFragmentCount++;
1460         } else {
1461                 if (frag == 0)
1462                         local->dot11FailedCount++;
1463         }
1464
1465         /* this was a transmitted frame, but now we want to reuse it */
1466         skb_orphan(skb);
1467
1468         /*
1469          * This is a bit racy but we can avoid a lot of work
1470          * with this test...
1471          */
1472         if (!local->monitors && !local->cooked_mntrs) {
1473                 dev_kfree_skb(skb);
1474                 return;
1475         }
1476
1477         /* send frame to monitor interfaces now */
1478
1479         if (skb_headroom(skb) < sizeof(*rthdr)) {
1480                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1481                 dev_kfree_skb(skb);
1482                 return;
1483         }
1484
1485         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1486                                 skb_push(skb, sizeof(*rthdr));
1487
1488         memset(rthdr, 0, sizeof(*rthdr));
1489         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1490         rthdr->hdr.it_present =
1491                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1492                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1493
1494         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1495             !is_multicast_ether_addr(hdr->addr1))
1496                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1497
1498         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1499             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1500                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1501         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1502                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1503
1504         rthdr->data_retries = status->retry_count;
1505
1506         /* XXX: is this sufficient for BPF? */
1507         skb_set_mac_header(skb, 0);
1508         skb->ip_summed = CHECKSUM_UNNECESSARY;
1509         skb->pkt_type = PACKET_OTHERHOST;
1510         skb->protocol = htons(ETH_P_802_2);
1511         memset(skb->cb, 0, sizeof(skb->cb));
1512
1513         rcu_read_lock();
1514         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1515                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1516                         if (!netif_running(sdata->dev))
1517                                 continue;
1518
1519                         if (prev_dev) {
1520                                 skb2 = skb_clone(skb, GFP_ATOMIC);
1521                                 if (skb2) {
1522                                         skb2->dev = prev_dev;
1523                                         netif_rx(skb2);
1524                                 }
1525                         }
1526
1527                         prev_dev = sdata->dev;
1528                 }
1529         }
1530         if (prev_dev) {
1531                 skb->dev = prev_dev;
1532                 netif_rx(skb);
1533                 skb = NULL;
1534         }
1535         rcu_read_unlock();
1536         dev_kfree_skb(skb);
1537 }
1538 EXPORT_SYMBOL(ieee80211_tx_status);
1539
1540 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1541                                         const struct ieee80211_ops *ops)
1542 {
1543         struct ieee80211_local *local;
1544         int priv_size;
1545         struct wiphy *wiphy;
1546
1547         /* Ensure 32-byte alignment of our private data and hw private data.
1548          * We use the wiphy priv data for both our ieee80211_local and for
1549          * the driver's private data
1550          *
1551          * In memory it'll be like this:
1552          *
1553          * +-------------------------+
1554          * | struct wiphy           |
1555          * +-------------------------+
1556          * | struct ieee80211_local  |
1557          * +-------------------------+
1558          * | driver's private data   |
1559          * +-------------------------+
1560          *
1561          */
1562         priv_size = ((sizeof(struct ieee80211_local) +
1563                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1564                     priv_data_len;
1565
1566         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1567
1568         if (!wiphy)
1569                 return NULL;
1570
1571         wiphy->privid = mac80211_wiphy_privid;
1572
1573         local = wiphy_priv(wiphy);
1574         local->hw.wiphy = wiphy;
1575
1576         local->hw.priv = (char *)local +
1577                          ((sizeof(struct ieee80211_local) +
1578                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1579
1580         BUG_ON(!ops->tx);
1581         BUG_ON(!ops->start);
1582         BUG_ON(!ops->stop);
1583         BUG_ON(!ops->config);
1584         BUG_ON(!ops->add_interface);
1585         BUG_ON(!ops->remove_interface);
1586         BUG_ON(!ops->configure_filter);
1587         local->ops = ops;
1588
1589         local->hw.queues = 1; /* default */
1590
1591         local->bridge_packets = 1;
1592
1593         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1594         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1595         local->short_retry_limit = 7;
1596         local->long_retry_limit = 4;
1597         local->hw.conf.radio_enabled = 1;
1598
1599         INIT_LIST_HEAD(&local->interfaces);
1600
1601         spin_lock_init(&local->key_lock);
1602
1603         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1604
1605         sta_info_init(local);
1606
1607         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1608                      (unsigned long)local);
1609         tasklet_disable(&local->tx_pending_tasklet);
1610
1611         tasklet_init(&local->tasklet,
1612                      ieee80211_tasklet_handler,
1613                      (unsigned long) local);
1614         tasklet_disable(&local->tasklet);
1615
1616         skb_queue_head_init(&local->skb_queue);
1617         skb_queue_head_init(&local->skb_queue_unreliable);
1618
1619         return local_to_hw(local);
1620 }
1621 EXPORT_SYMBOL(ieee80211_alloc_hw);
1622
1623 int ieee80211_register_hw(struct ieee80211_hw *hw)
1624 {
1625         struct ieee80211_local *local = hw_to_local(hw);
1626         const char *name;
1627         int result;
1628         enum ieee80211_band band;
1629         struct net_device *mdev;
1630         struct ieee80211_sub_if_data *sdata;
1631
1632         /*
1633          * generic code guarantees at least one band,
1634          * set this very early because much code assumes
1635          * that hw.conf.channel is assigned
1636          */
1637         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1638                 struct ieee80211_supported_band *sband;
1639
1640                 sband = local->hw.wiphy->bands[band];
1641                 if (sband) {
1642                         /* init channel we're on */
1643                         local->hw.conf.channel =
1644                         local->oper_channel =
1645                         local->scan_channel = &sband->channels[0];
1646                         break;
1647                 }
1648         }
1649
1650         result = wiphy_register(local->hw.wiphy);
1651         if (result < 0)
1652                 return result;
1653
1654         /* for now, mdev needs sub_if_data :/ */
1655         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1656                             "wmaster%d", ether_setup);
1657         if (!mdev)
1658                 goto fail_mdev_alloc;
1659
1660         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1661         mdev->ieee80211_ptr = &sdata->wdev;
1662         sdata->wdev.wiphy = local->hw.wiphy;
1663
1664         local->mdev = mdev;
1665
1666         ieee80211_rx_bss_list_init(mdev);
1667
1668         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1669         mdev->open = ieee80211_master_open;
1670         mdev->stop = ieee80211_master_stop;
1671         mdev->type = ARPHRD_IEEE80211;
1672         mdev->header_ops = &ieee80211_header_ops;
1673         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1674
1675         sdata->vif.type = IEEE80211_IF_TYPE_AP;
1676         sdata->dev = mdev;
1677         sdata->local = local;
1678         sdata->u.ap.force_unicast_rateidx = -1;
1679         sdata->u.ap.max_ratectrl_rateidx = -1;
1680         ieee80211_if_sdata_init(sdata);
1681
1682         /* no RCU needed since we're still during init phase */
1683         list_add_tail(&sdata->list, &local->interfaces);
1684
1685         name = wiphy_dev(local->hw.wiphy)->driver->name;
1686         local->hw.workqueue = create_singlethread_workqueue(name);
1687         if (!local->hw.workqueue) {
1688                 result = -ENOMEM;
1689                 goto fail_workqueue;
1690         }
1691
1692         /*
1693          * The hardware needs headroom for sending the frame,
1694          * and we need some headroom for passing the frame to monitor
1695          * interfaces, but never both at the same time.
1696          */
1697         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1698                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1699
1700         debugfs_hw_add(local);
1701
1702         local->hw.conf.beacon_int = 1000;
1703
1704         local->wstats_flags |= local->hw.max_rssi ?
1705                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1706         local->wstats_flags |= local->hw.max_signal ?
1707                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1708         local->wstats_flags |= local->hw.max_noise ?
1709                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1710         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1711                 local->wstats_flags |= IW_QUAL_DBM;
1712
1713         result = sta_info_start(local);
1714         if (result < 0)
1715                 goto fail_sta_info;
1716
1717         rtnl_lock();
1718         result = dev_alloc_name(local->mdev, local->mdev->name);
1719         if (result < 0)
1720                 goto fail_dev;
1721
1722         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1723         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1724
1725         result = register_netdevice(local->mdev);
1726         if (result < 0)
1727                 goto fail_dev;
1728
1729         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1730         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1731
1732         result = ieee80211_init_rate_ctrl_alg(local,
1733                                               hw->rate_control_algorithm);
1734         if (result < 0) {
1735                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1736                        "algorithm\n", wiphy_name(local->hw.wiphy));
1737                 goto fail_rate;
1738         }
1739
1740         result = ieee80211_wep_init(local);
1741
1742         if (result < 0) {
1743                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1744                        wiphy_name(local->hw.wiphy));
1745                 goto fail_wep;
1746         }
1747
1748         ieee80211_install_qdisc(local->mdev);
1749
1750         /* add one default STA interface */
1751         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1752                                   IEEE80211_IF_TYPE_STA, NULL);
1753         if (result)
1754                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1755                        wiphy_name(local->hw.wiphy));
1756
1757         local->reg_state = IEEE80211_DEV_REGISTERED;
1758         rtnl_unlock();
1759
1760         ieee80211_led_init(local);
1761
1762         return 0;
1763
1764 fail_wep:
1765         rate_control_deinitialize(local);
1766 fail_rate:
1767         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1768         unregister_netdevice(local->mdev);
1769         local->mdev = NULL;
1770 fail_dev:
1771         rtnl_unlock();
1772         sta_info_stop(local);
1773 fail_sta_info:
1774         debugfs_hw_del(local);
1775         destroy_workqueue(local->hw.workqueue);
1776 fail_workqueue:
1777         if (local->mdev != NULL) {
1778                 ieee80211_if_free(local->mdev);
1779                 local->mdev = NULL;
1780         }
1781 fail_mdev_alloc:
1782         wiphy_unregister(local->hw.wiphy);
1783         return result;
1784 }
1785 EXPORT_SYMBOL(ieee80211_register_hw);
1786
1787 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1788 {
1789         struct ieee80211_local *local = hw_to_local(hw);
1790         struct ieee80211_sub_if_data *sdata, *tmp;
1791
1792         tasklet_kill(&local->tx_pending_tasklet);
1793         tasklet_kill(&local->tasklet);
1794
1795         rtnl_lock();
1796
1797         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1798
1799         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1800
1801         /*
1802          * At this point, interface list manipulations are fine
1803          * because the driver cannot be handing us frames any
1804          * more and the tasklet is killed.
1805          */
1806
1807         /*
1808          * First, we remove all non-master interfaces. Do this because they
1809          * may have bss pointer dependency on the master, and when we free
1810          * the master these would be freed as well, breaking our list
1811          * iteration completely.
1812          */
1813         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1814                 if (sdata->dev == local->mdev)
1815                         continue;
1816                 list_del(&sdata->list);
1817                 __ieee80211_if_del(local, sdata);
1818         }
1819
1820         /* then, finally, remove the master interface */
1821         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1822
1823         rtnl_unlock();
1824
1825         ieee80211_rx_bss_list_deinit(local->mdev);
1826         ieee80211_clear_tx_pending(local);
1827         sta_info_stop(local);
1828         rate_control_deinitialize(local);
1829         debugfs_hw_del(local);
1830
1831         if (skb_queue_len(&local->skb_queue)
1832                         || skb_queue_len(&local->skb_queue_unreliable))
1833                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1834                        wiphy_name(local->hw.wiphy));
1835         skb_queue_purge(&local->skb_queue);
1836         skb_queue_purge(&local->skb_queue_unreliable);
1837
1838         destroy_workqueue(local->hw.workqueue);
1839         wiphy_unregister(local->hw.wiphy);
1840         ieee80211_wep_free(local);
1841         ieee80211_led_exit(local);
1842         ieee80211_if_free(local->mdev);
1843         local->mdev = NULL;
1844 }
1845 EXPORT_SYMBOL(ieee80211_unregister_hw);
1846
1847 void ieee80211_free_hw(struct ieee80211_hw *hw)
1848 {
1849         struct ieee80211_local *local = hw_to_local(hw);
1850
1851         wiphy_free(local->hw.wiphy);
1852 }
1853 EXPORT_SYMBOL(ieee80211_free_hw);
1854
1855 static int __init ieee80211_init(void)
1856 {
1857         struct sk_buff *skb;
1858         int ret;
1859
1860         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1861
1862         ret = rc80211_pid_init();
1863         if (ret)
1864                 goto out;
1865
1866         ret = ieee80211_wme_register();
1867         if (ret) {
1868                 printk(KERN_DEBUG "ieee80211_init: failed to "
1869                        "initialize WME (err=%d)\n", ret);
1870                 goto out_cleanup_pid;
1871         }
1872
1873         ieee80211_debugfs_netdev_init();
1874
1875         return 0;
1876
1877  out_cleanup_pid:
1878         rc80211_pid_exit();
1879  out:
1880         return ret;
1881 }
1882
1883 static void __exit ieee80211_exit(void)
1884 {
1885         rc80211_pid_exit();
1886
1887         /*
1888          * For key todo, it'll be empty by now but the work
1889          * might still be scheduled.
1890          */
1891         flush_scheduled_work();
1892
1893         if (mesh_allocated)
1894                 ieee80211s_stop();
1895
1896         ieee80211_wme_unregister();
1897         ieee80211_debugfs_netdev_exit();
1898 }
1899
1900
1901 subsys_initcall(ieee80211_init);
1902 module_exit(ieee80211_exit);
1903
1904 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1905 MODULE_LICENSE("GPL");