2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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.
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>
27 #include "ieee80211_i.h"
36 #include "debugfs_netdev.h"
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
46 } __attribute__ ((packed));
48 /* common interface routines */
50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
56 /* must be called under mdev tx lock */
57 static void ieee80211_configure_filter(struct ieee80211_local *local)
59 unsigned int changed_flags;
60 unsigned int new_flags = 0;
62 if (atomic_read(&local->iff_promiscs))
63 new_flags |= FIF_PROMISC_IN_BSS;
65 if (atomic_read(&local->iff_allmultis))
66 new_flags |= FIF_ALLMULTI;
69 new_flags |= FIF_BCN_PRBRESP_PROMISC;
71 if (local->fif_fcsfail)
72 new_flags |= FIF_FCSFAIL;
74 if (local->fif_plcpfail)
75 new_flags |= FIF_PLCPFAIL;
77 if (local->fif_control)
78 new_flags |= FIF_CONTROL;
80 if (local->fif_other_bss)
81 new_flags |= FIF_OTHER_BSS;
83 changed_flags = local->filter_flags ^ new_flags;
88 local->ops->configure_filter(local_to_hw(local),
89 changed_flags, &new_flags,
90 local->mdev->mc_count,
91 local->mdev->mc_list);
93 WARN_ON(new_flags & (1<<31));
95 local->filter_flags = new_flags & ~(1<<31);
98 /* master interface */
100 static int ieee80211_master_open(struct net_device *dev)
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
103 struct ieee80211_sub_if_data *sdata;
104 int res = -EOPNOTSUPP;
106 /* we hold the RTNL here so can safely walk the list */
107 list_for_each_entry(sdata, &local->interfaces, list) {
108 if (netif_running(sdata->dev)) {
117 netif_tx_start_all_queues(local->mdev);
122 static int ieee80211_master_stop(struct net_device *dev)
124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
125 struct ieee80211_sub_if_data *sdata;
127 /* we hold the RTNL here so can safely walk the list */
128 list_for_each_entry(sdata, &local->interfaces, list)
129 if (netif_running(sdata->dev))
130 dev_close(sdata->dev);
135 static void ieee80211_master_set_multicast_list(struct net_device *dev)
137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
139 ieee80211_configure_filter(local);
142 /* regular interfaces */
144 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
149 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
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 */
165 static inline int identical_mac_addr_allowed(int type1, int type2)
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)));
181 static int ieee80211_open(struct net_device *dev)
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;
189 bool need_hw_reconfig = 0;
191 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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;
197 if (ndev != dev && netif_running(ndev)) {
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.
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...
208 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
209 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
213 * The remaining checks are only performed for interfaces
214 * with the same MAC address.
216 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
220 * check whether it may have the same address
222 if (!identical_mac_addr_allowed(sdata->vif.type,
227 * can only add VLANs to enabled APs
229 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
230 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
231 sdata->bss = &nsdata->u.ap;
235 switch (sdata->vif.type) {
236 case IEEE80211_IF_TYPE_WDS:
237 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
240 case IEEE80211_IF_TYPE_VLAN:
243 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
245 case IEEE80211_IF_TYPE_AP:
246 sdata->bss = &sdata->u.ap;
248 case IEEE80211_IF_TYPE_MESH_POINT:
249 /* mesh ifaces must set allmulti to forward mcast traffic */
250 atomic_inc(&local->iff_allmultis);
252 case IEEE80211_IF_TYPE_STA:
253 case IEEE80211_IF_TYPE_MNTR:
254 case IEEE80211_IF_TYPE_IBSS:
255 /* no special treatment */
257 case IEEE80211_IF_TYPE_INVALID:
263 if (local->open_count == 0) {
265 if (local->ops->start)
266 res = local->ops->start(local_to_hw(local));
269 need_hw_reconfig = 1;
270 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
273 switch (sdata->vif.type) {
274 case IEEE80211_IF_TYPE_VLAN:
275 /* no need to tell driver */
277 case IEEE80211_IF_TYPE_MNTR:
278 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
279 local->cooked_mntrs++;
283 /* must be before the call to ieee80211_configure_filter */
285 if (local->monitors == 1)
286 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
288 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
289 local->fif_fcsfail++;
290 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
291 local->fif_plcpfail++;
292 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
293 local->fif_control++;
294 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
295 local->fif_other_bss++;
297 netif_addr_lock_bh(local->mdev);
298 ieee80211_configure_filter(local);
299 netif_addr_unlock_bh(local->mdev);
301 case IEEE80211_IF_TYPE_STA:
302 case IEEE80211_IF_TYPE_IBSS:
303 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
306 conf.vif = &sdata->vif;
307 conf.type = sdata->vif.type;
308 conf.mac_addr = dev->dev_addr;
309 res = local->ops->add_interface(local_to_hw(local), &conf);
313 if (ieee80211_vif_is_mesh(&sdata->vif))
314 ieee80211_start_mesh(sdata->dev);
315 changed |= ieee80211_reset_erp_info(dev);
316 ieee80211_bss_info_change_notify(sdata, changed);
317 ieee80211_enable_keys(sdata);
319 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
320 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
321 netif_carrier_off(dev);
323 netif_carrier_on(dev);
326 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
327 /* Create STA entry for the WDS peer */
328 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
332 goto err_del_interface;
335 /* no locking required since STA is not live yet */
336 sta->flags |= WLAN_STA_AUTHORIZED;
338 res = sta_info_insert(sta);
340 /* STA has been freed */
341 goto err_del_interface;
345 if (local->open_count == 0) {
346 res = dev_open(local->mdev);
349 goto err_del_interface;
350 tasklet_enable(&local->tx_pending_tasklet);
351 tasklet_enable(&local->tasklet);
355 * set_multicast_list will be invoked by the networking core
356 * which will check whether any increments here were done in
357 * error and sync them down to the hardware as filter flags.
359 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
360 atomic_inc(&local->iff_allmultis);
362 if (sdata->flags & IEEE80211_SDATA_PROMISC)
363 atomic_inc(&local->iff_promiscs);
366 if (need_hw_reconfig)
367 ieee80211_hw_config(local);
370 * ieee80211_sta_work is disabled while network interface
371 * is down. Therefore, some configuration changes may not
372 * yet be effective. Trigger execution of ieee80211_sta_work
375 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
376 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
377 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
378 queue_work(local->hw.workqueue, &ifsta->work);
381 netif_tx_start_all_queues(dev);
385 local->ops->remove_interface(local_to_hw(local), &conf);
387 if (!local->open_count && local->ops->stop)
388 local->ops->stop(local_to_hw(local));
391 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
392 list_del(&sdata->u.vlan.list);
396 static int ieee80211_stop(struct net_device *dev)
398 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
399 struct ieee80211_local *local = sdata->local;
400 struct ieee80211_if_init_conf conf;
401 struct sta_info *sta;
404 * Stop TX on this interface first.
406 netif_tx_stop_all_queues(dev);
409 * Now delete all active aggregation sessions.
413 list_for_each_entry_rcu(sta, &local->sta_list, list) {
414 if (sta->sdata == sdata)
415 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
421 * Remove all stations associated with this interface.
423 * This must be done before calling ops->remove_interface()
424 * because otherwise we can later invoke ops->sta_notify()
425 * whenever the STAs are removed, and that invalidates driver
426 * assumptions about always getting a vif pointer that is valid
427 * (because if we remove a STA after ops->remove_interface()
428 * the driver will have removed the vif info already!)
430 * We could relax this and only unlink the stations from the
431 * hash table and list but keep them on a per-sdata list that
432 * will be inserted back again when the interface is brought
433 * up again, but I don't currently see a use case for that,
434 * except with WDS which gets a STA entry created when it is
437 sta_info_flush(local, sdata);
440 * Don't count this interface for promisc/allmulti while it
441 * is down. dev_mc_unsync() will invoke set_multicast_list
442 * on the master interface which will sync these down to the
443 * hardware as filter flags.
445 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
446 atomic_dec(&local->iff_allmultis);
448 if (sdata->flags & IEEE80211_SDATA_PROMISC)
449 atomic_dec(&local->iff_promiscs);
451 dev_mc_unsync(local->mdev, dev);
453 /* APs need special treatment */
454 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
455 struct ieee80211_sub_if_data *vlan, *tmp;
456 struct beacon_data *old_beacon = sdata->u.ap.beacon;
459 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
463 /* down all dependent devices, that is VLANs */
464 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
466 dev_close(vlan->dev);
467 WARN_ON(!list_empty(&sdata->u.ap.vlans));
472 switch (sdata->vif.type) {
473 case IEEE80211_IF_TYPE_VLAN:
474 list_del(&sdata->u.vlan.list);
475 /* no need to tell driver */
477 case IEEE80211_IF_TYPE_MNTR:
478 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
479 local->cooked_mntrs--;
484 if (local->monitors == 0)
485 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
487 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
488 local->fif_fcsfail--;
489 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
490 local->fif_plcpfail--;
491 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
492 local->fif_control--;
493 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
494 local->fif_other_bss--;
496 netif_addr_lock_bh(local->mdev);
497 ieee80211_configure_filter(local);
498 netif_addr_unlock_bh(local->mdev);
500 case IEEE80211_IF_TYPE_MESH_POINT:
501 /* allmulti is always set on mesh ifaces */
502 atomic_dec(&local->iff_allmultis);
504 case IEEE80211_IF_TYPE_STA:
505 case IEEE80211_IF_TYPE_IBSS:
506 sdata->u.sta.state = IEEE80211_DISABLED;
507 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
508 del_timer_sync(&sdata->u.sta.timer);
510 * When we get here, the interface is marked down.
511 * Call synchronize_rcu() to wait for the RX path
512 * should it be using the interface and enqueuing
513 * frames at this very time on another CPU.
516 skb_queue_purge(&sdata->u.sta.skb_queue);
518 if (local->scan_dev == sdata->dev) {
519 if (!local->ops->hw_scan) {
520 local->sta_sw_scanning = 0;
521 cancel_delayed_work(&local->scan_work);
523 local->sta_hw_scanning = 0;
526 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
527 kfree(sdata->u.sta.extra_ie);
528 sdata->u.sta.extra_ie = NULL;
529 sdata->u.sta.extra_ie_len = 0;
532 conf.vif = &sdata->vif;
533 conf.type = sdata->vif.type;
534 conf.mac_addr = dev->dev_addr;
535 /* disable all keys for as long as this netdev is down */
536 ieee80211_disable_keys(sdata);
537 local->ops->remove_interface(local_to_hw(local), &conf);
542 if (local->open_count == 0) {
543 if (netif_running(local->mdev))
544 dev_close(local->mdev);
546 if (local->ops->stop)
547 local->ops->stop(local_to_hw(local));
549 ieee80211_led_radio(local, 0);
551 flush_workqueue(local->hw.workqueue);
553 tasklet_disable(&local->tx_pending_tasklet);
554 tasklet_disable(&local->tasklet);
560 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
562 struct ieee80211_local *local = hw_to_local(hw);
563 struct sta_info *sta;
564 struct ieee80211_sub_if_data *sdata;
565 u16 start_seq_num = 0;
568 DECLARE_MAC_BUF(mac);
570 if (tid >= STA_TID_NUM)
573 #ifdef CONFIG_MAC80211_HT_DEBUG
574 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
575 print_mac(mac, ra), tid);
576 #endif /* CONFIG_MAC80211_HT_DEBUG */
580 sta = sta_info_get(local, ra);
582 #ifdef CONFIG_MAC80211_HT_DEBUG
583 printk(KERN_DEBUG "Could not find the station\n");
589 spin_lock_bh(&sta->lock);
591 /* we have tried too many times, receiver does not want A-MPDU */
592 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
597 state = &sta->ampdu_mlme.tid_state_tx[tid];
598 /* check if the TID is not in aggregation flow already */
599 if (*state != HT_AGG_STATE_IDLE) {
600 #ifdef CONFIG_MAC80211_HT_DEBUG
601 printk(KERN_DEBUG "BA request denied - session is not "
602 "idle on tid %u\n", tid);
603 #endif /* CONFIG_MAC80211_HT_DEBUG */
608 /* prepare A-MPDU MLME for Tx aggregation */
609 sta->ampdu_mlme.tid_tx[tid] =
610 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
611 if (!sta->ampdu_mlme.tid_tx[tid]) {
612 #ifdef CONFIG_MAC80211_HT_DEBUG
614 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
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);
627 /* create a new queue for this aggregation */
628 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
630 /* case no queue is available to aggregation
631 * don't switch to aggregation */
633 #ifdef CONFIG_MAC80211_HT_DEBUG
634 printk(KERN_DEBUG "BA request denied - queue unavailable for"
636 #endif /* CONFIG_MAC80211_HT_DEBUG */
637 goto err_unlock_queue;
641 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
642 * call back right away, it must see that the flow has begun */
643 *state |= HT_ADDBA_REQUESTED_MSK;
645 if (local->ops->ampdu_action)
646 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
647 ra, tid, &start_seq_num);
650 /* No need to requeue the packets in the agg queue, since we
651 * held the tx lock: no packet could be enqueued to the newly
653 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
654 #ifdef CONFIG_MAC80211_HT_DEBUG
655 printk(KERN_DEBUG "BA request denied - HW unavailable for"
657 #endif /* CONFIG_MAC80211_HT_DEBUG */
658 *state = HT_AGG_STATE_IDLE;
659 goto err_unlock_queue;
662 /* Will put all the packets in the new SW queue */
663 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
664 spin_unlock_bh(&sta->lock);
666 /* send an addBA request */
667 sta->ampdu_mlme.dialog_token_allocator++;
668 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
669 sta->ampdu_mlme.dialog_token_allocator;
670 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
673 ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
674 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
675 sta->ampdu_mlme.tid_tx[tid]->ssn,
677 /* activate the timer for the recipient's addBA response */
678 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
679 jiffies + ADDBA_RESP_INTERVAL;
680 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
681 #ifdef CONFIG_MAC80211_HT_DEBUG
682 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
687 kfree(sta->ampdu_mlme.tid_tx[tid]);
688 sta->ampdu_mlme.tid_tx[tid] = NULL;
691 spin_unlock_bh(&sta->lock);
696 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
698 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
700 enum ieee80211_back_parties initiator)
702 struct ieee80211_local *local = hw_to_local(hw);
703 struct sta_info *sta;
706 DECLARE_MAC_BUF(mac);
708 if (tid >= STA_TID_NUM)
712 sta = sta_info_get(local, ra);
718 /* check if the TID is in aggregation */
719 state = &sta->ampdu_mlme.tid_state_tx[tid];
720 spin_lock_bh(&sta->lock);
722 if (*state != HT_AGG_STATE_OPERATIONAL) {
727 #ifdef CONFIG_MAC80211_HT_DEBUG
728 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
729 print_mac(mac, ra), tid);
730 #endif /* CONFIG_MAC80211_HT_DEBUG */
732 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
734 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
735 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
737 if (local->ops->ampdu_action)
738 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
741 /* case HW denied going back to legacy */
743 WARN_ON(ret != -EBUSY);
744 *state = HT_AGG_STATE_OPERATIONAL;
745 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
750 spin_unlock_bh(&sta->lock);
754 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
756 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
758 struct ieee80211_local *local = hw_to_local(hw);
759 struct sta_info *sta;
761 DECLARE_MAC_BUF(mac);
763 if (tid >= STA_TID_NUM) {
764 #ifdef CONFIG_MAC80211_HT_DEBUG
765 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
772 sta = sta_info_get(local, ra);
775 #ifdef CONFIG_MAC80211_HT_DEBUG
776 printk(KERN_DEBUG "Could not find station: %s\n",
782 state = &sta->ampdu_mlme.tid_state_tx[tid];
783 spin_lock_bh(&sta->lock);
785 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
786 #ifdef CONFIG_MAC80211_HT_DEBUG
787 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
790 spin_unlock_bh(&sta->lock);
795 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
797 *state |= HT_ADDBA_DRV_READY_MSK;
799 if (*state == HT_AGG_STATE_OPERATIONAL) {
800 #ifdef CONFIG_MAC80211_HT_DEBUG
801 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
803 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
805 spin_unlock_bh(&sta->lock);
808 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
810 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
812 struct ieee80211_local *local = hw_to_local(hw);
813 struct sta_info *sta;
816 DECLARE_MAC_BUF(mac);
818 if (tid >= STA_TID_NUM) {
819 #ifdef CONFIG_MAC80211_HT_DEBUG
820 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
826 #ifdef CONFIG_MAC80211_HT_DEBUG
827 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
828 print_mac(mac, ra), tid);
829 #endif /* CONFIG_MAC80211_HT_DEBUG */
832 sta = sta_info_get(local, ra);
834 #ifdef CONFIG_MAC80211_HT_DEBUG
835 printk(KERN_DEBUG "Could not find station: %s\n",
841 state = &sta->ampdu_mlme.tid_state_tx[tid];
843 /* NOTE: no need to use sta->lock in this state check, as
844 * ieee80211_stop_tx_ba_session will let only one stop call to
845 * pass through per sta/tid
847 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
848 #ifdef CONFIG_MAC80211_HT_DEBUG
849 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
855 if (*state & HT_AGG_STATE_INITIATOR_MSK)
856 ieee80211_send_delba(sta->sdata->dev, ra, tid,
857 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
859 agg_queue = sta->tid_to_tx_q[tid];
861 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
863 /* We just requeued the all the frames that were in the
864 * removed queue, and since we might miss a softirq we do
865 * netif_schedule_queue. ieee80211_wake_queue is not used
866 * here as this queue is not necessarily stopped
868 netif_schedule_queue(netdev_get_tx_queue(local->mdev, agg_queue));
869 spin_lock_bh(&sta->lock);
870 *state = HT_AGG_STATE_IDLE;
871 sta->ampdu_mlme.addba_req_num[tid] = 0;
872 kfree(sta->ampdu_mlme.tid_tx[tid]);
873 sta->ampdu_mlme.tid_tx[tid] = NULL;
874 spin_unlock_bh(&sta->lock);
878 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
880 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
881 const u8 *ra, u16 tid)
883 struct ieee80211_local *local = hw_to_local(hw);
884 struct ieee80211_ra_tid *ra_tid;
885 struct sk_buff *skb = dev_alloc_skb(0);
887 if (unlikely(!skb)) {
888 #ifdef CONFIG_MAC80211_HT_DEBUG
890 printk(KERN_WARNING "%s: Not enough memory, "
891 "dropping start BA session", skb->dev->name);
895 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
896 memcpy(&ra_tid->ra, ra, ETH_ALEN);
899 skb->pkt_type = IEEE80211_ADDBA_MSG;
900 skb_queue_tail(&local->skb_queue, skb);
901 tasklet_schedule(&local->tasklet);
903 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
905 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
906 const u8 *ra, u16 tid)
908 struct ieee80211_local *local = hw_to_local(hw);
909 struct ieee80211_ra_tid *ra_tid;
910 struct sk_buff *skb = dev_alloc_skb(0);
912 if (unlikely(!skb)) {
913 #ifdef CONFIG_MAC80211_HT_DEBUG
915 printk(KERN_WARNING "%s: Not enough memory, "
916 "dropping stop BA session", skb->dev->name);
920 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
921 memcpy(&ra_tid->ra, ra, ETH_ALEN);
924 skb->pkt_type = IEEE80211_DELBA_MSG;
925 skb_queue_tail(&local->skb_queue, skb);
926 tasklet_schedule(&local->tasklet);
928 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
930 static void ieee80211_set_multicast_list(struct net_device *dev)
932 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
933 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
934 int allmulti, promisc, sdata_allmulti, sdata_promisc;
936 allmulti = !!(dev->flags & IFF_ALLMULTI);
937 promisc = !!(dev->flags & IFF_PROMISC);
938 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
939 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
941 if (allmulti != sdata_allmulti) {
942 if (dev->flags & IFF_ALLMULTI)
943 atomic_inc(&local->iff_allmultis);
945 atomic_dec(&local->iff_allmultis);
946 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
949 if (promisc != sdata_promisc) {
950 if (dev->flags & IFF_PROMISC)
951 atomic_inc(&local->iff_promiscs);
953 atomic_dec(&local->iff_promiscs);
954 sdata->flags ^= IEEE80211_SDATA_PROMISC;
957 dev_mc_sync(local->mdev, dev);
960 static const struct header_ops ieee80211_header_ops = {
961 .create = eth_header,
962 .parse = header_parse_80211,
963 .rebuild = eth_rebuild_header,
964 .cache = eth_header_cache,
965 .cache_update = eth_header_cache_update,
968 void ieee80211_if_setup(struct net_device *dev)
971 dev->hard_start_xmit = ieee80211_subif_start_xmit;
972 dev->wireless_handlers = &ieee80211_iw_handler_def;
973 dev->set_multicast_list = ieee80211_set_multicast_list;
974 dev->change_mtu = ieee80211_change_mtu;
975 dev->open = ieee80211_open;
976 dev->stop = ieee80211_stop;
977 dev->destructor = free_netdev;
980 /* everything else */
982 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
984 struct ieee80211_local *local = sdata->local;
985 struct ieee80211_if_conf conf;
987 if (WARN_ON(!netif_running(sdata->dev)))
990 if (!local->ops->config_interface)
993 memset(&conf, 0, sizeof(conf));
994 conf.changed = changed;
996 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
997 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
998 conf.bssid = sdata->u.sta.bssid;
999 conf.ssid = sdata->u.sta.ssid;
1000 conf.ssid_len = sdata->u.sta.ssid_len;
1001 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1002 conf.bssid = sdata->dev->dev_addr;
1003 conf.ssid = sdata->u.ap.ssid;
1004 conf.ssid_len = sdata->u.ap.ssid_len;
1005 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1006 u8 zero[ETH_ALEN] = { 0 };
1015 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
1018 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
1021 return local->ops->config_interface(local_to_hw(local),
1022 &sdata->vif, &conf);
1025 int ieee80211_hw_config(struct ieee80211_local *local)
1027 struct ieee80211_channel *chan;
1030 if (local->sta_sw_scanning)
1031 chan = local->scan_channel;
1033 chan = local->oper_channel;
1035 local->hw.conf.channel = chan;
1037 if (!local->hw.conf.power_level)
1038 local->hw.conf.power_level = chan->max_power;
1040 local->hw.conf.power_level = min(chan->max_power,
1041 local->hw.conf.power_level);
1043 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1045 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1046 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1047 wiphy_name(local->hw.wiphy), chan->center_freq);
1050 if (local->open_count)
1051 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1057 * ieee80211_handle_ht should be used only after legacy configuration
1058 * has been determined namely band, as ht configuration depends upon
1059 * the hardware's HT abilities for a _specific_ band.
1061 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1062 struct ieee80211_ht_info *req_ht_cap,
1063 struct ieee80211_ht_bss_info *req_bss_cap)
1065 struct ieee80211_conf *conf = &local->hw.conf;
1066 struct ieee80211_supported_band *sband;
1067 struct ieee80211_ht_info ht_conf;
1068 struct ieee80211_ht_bss_info ht_bss_conf;
1071 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1074 sband = local->hw.wiphy->bands[conf->channel->band];
1076 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1077 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1079 /* HT is not supported */
1080 if (!sband->ht_info.ht_supported) {
1081 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1087 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1088 changed |= BSS_CHANGED_HT;
1089 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1090 conf->ht_conf.ht_supported = 0;
1095 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1096 changed |= BSS_CHANGED_HT;
1098 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1099 ht_conf.ht_supported = 1;
1101 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1102 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1103 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1104 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1105 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1106 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1108 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1109 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1112 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1114 /* configure suppoerted Tx MCS according to requested MCS
1115 * (based in most cases on Rx capabilities of peer) and self
1116 * Tx MCS capabilities (as defined by low level driver HW
1117 * Tx capabilities) */
1118 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1121 /* Counting from 0 therfore + 1 */
1122 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1123 max_tx_streams = ((tx_mcs_set_cap &
1124 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1126 for (i = 0; i < max_tx_streams; i++)
1127 ht_conf.supp_mcs_set[i] =
1128 sband->ht_info.supp_mcs_set[i] &
1129 req_ht_cap->supp_mcs_set[i];
1131 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1132 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1133 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1134 ht_conf.supp_mcs_set[i] =
1135 sband->ht_info.supp_mcs_set[i] &
1136 req_ht_cap->supp_mcs_set[i];
1139 /* if bss configuration changed store the new one */
1140 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1141 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1142 changed |= BSS_CHANGED_HT;
1143 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1144 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1150 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1153 struct ieee80211_local *local = sdata->local;
1158 if (local->ops->bss_info_changed)
1159 local->ops->bss_info_changed(local_to_hw(local),
1165 u32 ieee80211_reset_erp_info(struct net_device *dev)
1167 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1169 sdata->bss_conf.use_cts_prot = 0;
1170 sdata->bss_conf.use_short_preamble = 0;
1171 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
1174 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1175 struct sk_buff *skb)
1177 struct ieee80211_local *local = hw_to_local(hw);
1178 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1181 skb->dev = local->mdev;
1182 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1183 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1184 &local->skb_queue : &local->skb_queue_unreliable, skb);
1185 tmp = skb_queue_len(&local->skb_queue) +
1186 skb_queue_len(&local->skb_queue_unreliable);
1187 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1188 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1189 dev_kfree_skb_irq(skb);
1191 I802_DEBUG_INC(local->tx_status_drop);
1193 tasklet_schedule(&local->tasklet);
1195 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1197 static void ieee80211_tasklet_handler(unsigned long data)
1199 struct ieee80211_local *local = (struct ieee80211_local *) data;
1200 struct sk_buff *skb;
1201 struct ieee80211_rx_status rx_status;
1202 struct ieee80211_ra_tid *ra_tid;
1204 while ((skb = skb_dequeue(&local->skb_queue)) ||
1205 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1206 switch (skb->pkt_type) {
1207 case IEEE80211_RX_MSG:
1208 /* status is in skb->cb */
1209 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1210 /* Clear skb->pkt_type in order to not confuse kernel
1213 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1215 case IEEE80211_TX_STATUS_MSG:
1217 ieee80211_tx_status(local_to_hw(local), skb);
1219 case IEEE80211_DELBA_MSG:
1220 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1221 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1222 ra_tid->ra, ra_tid->tid);
1225 case IEEE80211_ADDBA_MSG:
1226 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1227 ieee80211_start_tx_ba_cb(local_to_hw(local),
1228 ra_tid->ra, ra_tid->tid);
1239 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1240 * make a prepared TX frame (one that has been given to hw) to look like brand
1241 * new IEEE 802.11 frame that is ready to go through TX processing again.
1243 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1244 struct ieee80211_key *key,
1245 struct sk_buff *skb)
1247 unsigned int hdrlen, iv_len, mic_len;
1248 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1250 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1255 switch (key->conf.alg) {
1257 iv_len = WEP_IV_LEN;
1258 mic_len = WEP_ICV_LEN;
1261 iv_len = TKIP_IV_LEN;
1262 mic_len = TKIP_ICV_LEN;
1265 iv_len = CCMP_HDR_LEN;
1266 mic_len = CCMP_MIC_LEN;
1272 if (skb->len >= hdrlen + mic_len &&
1273 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1274 skb_trim(skb, skb->len - mic_len);
1275 if (skb->len >= hdrlen + iv_len) {
1276 memmove(skb->data + iv_len, skb->data, hdrlen);
1277 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
1281 if (ieee80211_is_data_qos(hdr->frame_control)) {
1282 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1283 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
1284 hdrlen - IEEE80211_QOS_CTL_LEN);
1285 skb_pull(skb, IEEE80211_QOS_CTL_LEN);
1289 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1290 struct sta_info *sta,
1291 struct sk_buff *skb)
1293 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1295 sta->tx_filtered_count++;
1298 * Clear the TX filter mask for this STA when sending the next
1299 * packet. If the STA went to power save mode, this will happen
1300 * when it wakes up for the next time.
1302 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1305 * This code races in the following way:
1307 * (1) STA sends frame indicating it will go to sleep and does so
1308 * (2) hardware/firmware adds STA to filter list, passes frame up
1309 * (3) hardware/firmware processes TX fifo and suppresses a frame
1310 * (4) we get TX status before having processed the frame and
1311 * knowing that the STA has gone to sleep.
1313 * This is actually quite unlikely even when both those events are
1314 * processed from interrupts coming in quickly after one another or
1315 * even at the same time because we queue both TX status events and
1316 * RX frames to be processed by a tasklet and process them in the
1317 * same order that they were received or TX status last. Hence, there
1318 * is no race as long as the frame RX is processed before the next TX
1319 * status, which drivers can ensure, see below.
1321 * Note that this can only happen if the hardware or firmware can
1322 * actually add STAs to the filter list, if this is done by the
1323 * driver in response to set_tim() (which will only reduce the race
1324 * this whole filtering tries to solve, not completely solve it)
1325 * this situation cannot happen.
1327 * To completely solve this race drivers need to make sure that they
1328 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1330 * (b) always process RX events before TX status events if ordering
1331 * can be unknown, for example with different interrupt status
1334 if (test_sta_flags(sta, WLAN_STA_PS) &&
1335 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1336 ieee80211_remove_tx_extra(local, sta->key, skb);
1337 skb_queue_tail(&sta->tx_filtered, skb);
1341 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1342 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1343 /* Software retry the packet once */
1344 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1345 ieee80211_remove_tx_extra(local, sta->key, skb);
1346 dev_queue_xmit(skb);
1350 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1351 if (net_ratelimit())
1352 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1353 "queue_len=%d PS=%d @%lu\n",
1354 wiphy_name(local->hw.wiphy),
1355 skb_queue_len(&sta->tx_filtered),
1356 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1361 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1363 struct sk_buff *skb2;
1364 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1365 struct ieee80211_local *local = hw_to_local(hw);
1366 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1369 struct ieee80211_tx_status_rtap_hdr *rthdr;
1370 struct ieee80211_sub_if_data *sdata;
1371 struct net_device *prev_dev = NULL;
1372 struct sta_info *sta;
1376 if (info->status.excessive_retries) {
1377 sta = sta_info_get(local, hdr->addr1);
1379 if (test_sta_flags(sta, WLAN_STA_PS)) {
1381 * The STA is in power save mode, so assume
1382 * that this TX packet failed because of that.
1384 ieee80211_handle_filtered_frame(local, sta, skb);
1391 fc = hdr->frame_control;
1393 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1394 (ieee80211_is_data_qos(fc))) {
1397 sta = sta_info_get(local, hdr->addr1);
1399 qc = ieee80211_get_qos_ctl(hdr);
1401 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1402 & IEEE80211_SCTL_SEQ);
1403 ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
1408 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1409 sta = sta_info_get(local, hdr->addr1);
1411 ieee80211_handle_filtered_frame(local, sta, skb);
1416 rate_control_tx_status(local->mdev, skb);
1420 ieee80211_led_tx(local, 0);
1423 * Fragments are passed to low-level drivers as separate skbs, so these
1424 * are actually fragments, not frames. Update frame counters only for
1425 * the first fragment of the frame. */
1427 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1428 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1430 if (info->flags & IEEE80211_TX_STAT_ACK) {
1432 local->dot11TransmittedFrameCount++;
1433 if (is_multicast_ether_addr(hdr->addr1))
1434 local->dot11MulticastTransmittedFrameCount++;
1435 if (info->status.retry_count > 0)
1436 local->dot11RetryCount++;
1437 if (info->status.retry_count > 1)
1438 local->dot11MultipleRetryCount++;
1441 /* This counter shall be incremented for an acknowledged MPDU
1442 * with an individual address in the address 1 field or an MPDU
1443 * with a multicast address in the address 1 field of type Data
1445 if (!is_multicast_ether_addr(hdr->addr1) ||
1446 type == IEEE80211_FTYPE_DATA ||
1447 type == IEEE80211_FTYPE_MGMT)
1448 local->dot11TransmittedFragmentCount++;
1451 local->dot11FailedCount++;
1454 /* this was a transmitted frame, but now we want to reuse it */
1458 * This is a bit racy but we can avoid a lot of work
1461 if (!local->monitors && !local->cooked_mntrs) {
1466 /* send frame to monitor interfaces now */
1468 if (skb_headroom(skb) < sizeof(*rthdr)) {
1469 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1474 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1475 skb_push(skb, sizeof(*rthdr));
1477 memset(rthdr, 0, sizeof(*rthdr));
1478 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1479 rthdr->hdr.it_present =
1480 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1481 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1483 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1484 !is_multicast_ether_addr(hdr->addr1))
1485 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1487 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1488 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1489 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1490 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1491 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1493 rthdr->data_retries = info->status.retry_count;
1495 /* XXX: is this sufficient for BPF? */
1496 skb_set_mac_header(skb, 0);
1497 skb->ip_summed = CHECKSUM_UNNECESSARY;
1498 skb->pkt_type = PACKET_OTHERHOST;
1499 skb->protocol = htons(ETH_P_802_2);
1500 memset(skb->cb, 0, sizeof(skb->cb));
1503 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1504 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1505 if (!netif_running(sdata->dev))
1509 skb2 = skb_clone(skb, GFP_ATOMIC);
1511 skb2->dev = prev_dev;
1516 prev_dev = sdata->dev;
1520 skb->dev = prev_dev;
1527 EXPORT_SYMBOL(ieee80211_tx_status);
1529 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1530 const struct ieee80211_ops *ops)
1532 struct ieee80211_local *local;
1534 struct wiphy *wiphy;
1536 /* Ensure 32-byte alignment of our private data and hw private data.
1537 * We use the wiphy priv data for both our ieee80211_local and for
1538 * the driver's private data
1540 * In memory it'll be like this:
1542 * +-------------------------+
1544 * +-------------------------+
1545 * | struct ieee80211_local |
1546 * +-------------------------+
1547 * | driver's private data |
1548 * +-------------------------+
1551 priv_size = ((sizeof(struct ieee80211_local) +
1552 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1555 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1560 wiphy->privid = mac80211_wiphy_privid;
1562 local = wiphy_priv(wiphy);
1563 local->hw.wiphy = wiphy;
1565 local->hw.priv = (char *)local +
1566 ((sizeof(struct ieee80211_local) +
1567 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1570 BUG_ON(!ops->start);
1572 BUG_ON(!ops->config);
1573 BUG_ON(!ops->add_interface);
1574 BUG_ON(!ops->remove_interface);
1575 BUG_ON(!ops->configure_filter);
1578 local->hw.queues = 1; /* default */
1580 local->bridge_packets = 1;
1582 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1583 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1584 local->short_retry_limit = 7;
1585 local->long_retry_limit = 4;
1586 local->hw.conf.radio_enabled = 1;
1588 INIT_LIST_HEAD(&local->interfaces);
1590 spin_lock_init(&local->key_lock);
1592 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1594 sta_info_init(local);
1596 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1597 (unsigned long)local);
1598 tasklet_disable(&local->tx_pending_tasklet);
1600 tasklet_init(&local->tasklet,
1601 ieee80211_tasklet_handler,
1602 (unsigned long) local);
1603 tasklet_disable(&local->tasklet);
1605 skb_queue_head_init(&local->skb_queue);
1606 skb_queue_head_init(&local->skb_queue_unreliable);
1608 return local_to_hw(local);
1610 EXPORT_SYMBOL(ieee80211_alloc_hw);
1612 int ieee80211_register_hw(struct ieee80211_hw *hw)
1614 struct ieee80211_local *local = hw_to_local(hw);
1617 enum ieee80211_band band;
1618 struct net_device *mdev;
1619 struct wireless_dev *mwdev;
1622 * generic code guarantees at least one band,
1623 * set this very early because much code assumes
1624 * that hw.conf.channel is assigned
1626 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1627 struct ieee80211_supported_band *sband;
1629 sband = local->hw.wiphy->bands[band];
1631 /* init channel we're on */
1632 local->hw.conf.channel =
1633 local->oper_channel =
1634 local->scan_channel = &sband->channels[0];
1639 result = wiphy_register(local->hw.wiphy);
1644 * We use the number of queues for feature tests (QoS, HT) internally
1645 * so restrict them appropriately.
1647 if (hw->queues > IEEE80211_MAX_QUEUES)
1648 hw->queues = IEEE80211_MAX_QUEUES;
1649 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1650 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1652 hw->ampdu_queues = 0;
1654 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1655 "wmaster%d", ether_setup,
1656 ieee80211_num_queues(hw));
1658 goto fail_mdev_alloc;
1660 mwdev = netdev_priv(mdev);
1661 mdev->ieee80211_ptr = mwdev;
1662 mwdev->wiphy = local->hw.wiphy;
1666 ieee80211_rx_bss_list_init(local);
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;
1675 name = wiphy_dev(local->hw.wiphy)->driver->name;
1676 local->hw.workqueue = create_freezeable_workqueue(name);
1677 if (!local->hw.workqueue) {
1679 goto fail_workqueue;
1683 * The hardware needs headroom for sending the frame,
1684 * and we need some headroom for passing the frame to monitor
1685 * interfaces, but never both at the same time.
1687 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1688 sizeof(struct ieee80211_tx_status_rtap_hdr));
1690 debugfs_hw_add(local);
1692 if (local->hw.conf.beacon_int < 10)
1693 local->hw.conf.beacon_int = 100;
1695 if (local->hw.max_listen_interval == 0)
1696 local->hw.max_listen_interval = 1;
1698 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1700 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1701 IEEE80211_HW_SIGNAL_DB |
1702 IEEE80211_HW_SIGNAL_DBM) ?
1703 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1704 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1705 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1706 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1707 local->wstats_flags |= IW_QUAL_DBM;
1709 result = sta_info_start(local);
1714 result = dev_alloc_name(local->mdev, local->mdev->name);
1718 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1719 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1721 result = register_netdevice(local->mdev);
1725 result = ieee80211_init_rate_ctrl_alg(local,
1726 hw->rate_control_algorithm);
1728 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1729 "algorithm\n", wiphy_name(local->hw.wiphy));
1733 result = ieee80211_wep_init(local);
1736 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
1737 wiphy_name(local->hw.wiphy), result);
1741 local->mdev->select_queue = ieee80211_select_queue;
1743 /* add one default STA interface */
1744 result = ieee80211_if_add(local, "wlan%d", NULL,
1745 IEEE80211_IF_TYPE_STA, NULL);
1747 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1748 wiphy_name(local->hw.wiphy));
1752 ieee80211_led_init(local);
1757 rate_control_deinitialize(local);
1759 unregister_netdevice(local->mdev);
1763 sta_info_stop(local);
1765 debugfs_hw_del(local);
1766 destroy_workqueue(local->hw.workqueue);
1769 free_netdev(local->mdev);
1771 wiphy_unregister(local->hw.wiphy);
1774 EXPORT_SYMBOL(ieee80211_register_hw);
1776 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1778 struct ieee80211_local *local = hw_to_local(hw);
1780 tasklet_kill(&local->tx_pending_tasklet);
1781 tasklet_kill(&local->tasklet);
1786 * At this point, interface list manipulations are fine
1787 * because the driver cannot be handing us frames any
1788 * more and the tasklet is killed.
1791 /* First, we remove all virtual interfaces. */
1792 ieee80211_remove_interfaces(local);
1794 /* then, finally, remove the master interface */
1795 unregister_netdevice(local->mdev);
1799 ieee80211_rx_bss_list_deinit(local);
1800 ieee80211_clear_tx_pending(local);
1801 sta_info_stop(local);
1802 rate_control_deinitialize(local);
1803 debugfs_hw_del(local);
1805 if (skb_queue_len(&local->skb_queue)
1806 || skb_queue_len(&local->skb_queue_unreliable))
1807 printk(KERN_WARNING "%s: skb_queue not empty\n",
1808 wiphy_name(local->hw.wiphy));
1809 skb_queue_purge(&local->skb_queue);
1810 skb_queue_purge(&local->skb_queue_unreliable);
1812 destroy_workqueue(local->hw.workqueue);
1813 wiphy_unregister(local->hw.wiphy);
1814 ieee80211_wep_free(local);
1815 ieee80211_led_exit(local);
1816 free_netdev(local->mdev);
1818 EXPORT_SYMBOL(ieee80211_unregister_hw);
1820 void ieee80211_free_hw(struct ieee80211_hw *hw)
1822 struct ieee80211_local *local = hw_to_local(hw);
1824 wiphy_free(local->hw.wiphy);
1826 EXPORT_SYMBOL(ieee80211_free_hw);
1828 static int __init ieee80211_init(void)
1830 struct sk_buff *skb;
1833 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1834 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1835 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1837 ret = rc80211_pid_init();
1841 ieee80211_debugfs_netdev_init();
1846 static void __exit ieee80211_exit(void)
1851 * For key todo, it'll be empty by now but the work
1852 * might still be scheduled.
1854 flush_scheduled_work();
1859 ieee80211_debugfs_netdev_exit();
1863 subsys_initcall(ieee80211_init);
1864 module_exit(ieee80211_exit);
1866 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1867 MODULE_LICENSE("GPL");